CN117848703A

CN117848703A - Testing system and testing method for hydraulic characteristics of rainwater buckets used for building roof drainage

Info

Publication number: CN117848703A
Application number: CN202410040004.6A
Authority: CN
Inventors: 朱生高; 高佳华; 宋志堃; 杨川; 张奇奇; 王晟; 王勇华; 路扬
Original assignee: National Testing And Testing Holding Group Beijing Technology Co ltd
Current assignee: National Testing And Testing Holding Group Beijing Technology Co ltd
Priority date: 2024-01-10
Filing date: 2024-01-10
Publication date: 2024-04-09
Anticipated expiration: 2044-01-10
Also published as: CN117848703B

Abstract

The invention discloses a system and a method for testing hydraulic characteristics of a rain water bucket for drainage of a building roof, wherein the system comprises a water storage tank, a variable frequency pump assembly, a water inlet pipe assembly, a test water tank assembly, a drain pipe assembly, two operation tables and a plurality of support columns, wherein the water storage tank, the variable frequency pump assembly, the water inlet pipe assembly, the test water tank assembly and the drain pipe assembly are sequentially connected to form a closed loop for water inlet and drainage, the side surfaces of the two operation tables are fixedly connected with a test platform, one end of the plurality of support columns is fixedly connected with the test system, and the other end of the plurality of support columns is fixedly connected with the test platform; the test method comprises the following steps: installing and checking a test system; testing the flow and the front water depth of the direct drainage type rainwater hopper and testing the local resistance coefficient; and testing the maximum flow of the side-entering type rainwater hopper. According to the invention, the direct drainage type rain water bucket and the side inlet type rain water bucket are combined into one test water tank, so that a shared test water tank is formed, the installation workload is reduced, and the working efficiency is improved.

Description

System and method for testing hydraulic characteristics of rain bucket for building roof drainage

Technical Field

The invention belongs to the technical field of building roof drainage equipment testing, and particularly relates to a system and a method for testing hydraulic characteristics of a rain bucket for building roof drainage.

Background

With the rapid increase of the number of public buildings such as airports, high-speed rail stations, gyms and the like and the rapid development of high-rise buildings, the performance requirements of the building roofs on the rainwater drainage system are higher and higher, and particularly for building roofs with high building, large span and complex structure, the performance of the rainwater drainage system should be paid more attention to. When the rainy season encounters heavy rain, industrial buildings and civil buildings can quickly gather rainwater due to unsmooth drainage of building roofs, so that the building roofs leak rainwater and even collapse, and accidents such as property loss, casualties and the like can be caused when the accidents are serious.

At present, roof rainwater drainage systems of industrial buildings and civil buildings adopt rainwater hopper drainage systems, and a rainwater hopper is arranged at an inlet of roof rainwater entering a rainwater pipeline from a gutter. Be equipped with the rectification grille installation in the rainwater fill, this rectification grille installation has the rectification effect, can avoid the rainwater to form too big vortex in the rainwater fill, stabilizes the fill front water level, reduces the air entrainment to the rainwater of quick discharge building roofing can effectively block the debris that the size is great simultaneously and get into the downspout and influence drainage effect. The metallic water falling system composed of the rain water bucket, the gutter and the water falling pipe plays a practical and decorative role.

At the end of 2021, china issued a general technical Standard for rain Water bucket for drainage of building roofing (CJ/T245-2021), wherein key technical indexes of the rain Water bucket are hydraulic characteristics, and the hydraulic characteristics mainly comprise the relation between flow and depth of water in front of the bucket, local resistance coefficient and the like. At present, no corresponding testing device and no corresponding testing method exist in units such as a rain bucket manufacturer, a higher institution, a scientific research institution, a detection mechanism and the like, the units only calculate the hydraulic characteristics of the rain bucket through a software modeling and analog calculation method, and the theoretical calculation and the actual application have great difference, so that the obtained calculation result cannot completely meet the requirements of actual engineering, and meanwhile, no reliable basis exists for improvement of the rain bucket and improvement of the hydraulic characteristics.

In addition, the standards describe a flow and bucket front water depth test device diagram, a side entry type rain bucket and rain bearing bucket flow and bucket front water depth test device diagram and a siphon rain bucket local resistance coefficient test device diagram, and the comparison shows that: the three independent test devices are used for testing the flow of the in-line rain water bucket, the front water depth of the bucket, the flow of the side-entry rain water bucket, the front water depth of the bucket and the local resistance coefficient of the in-line rain water bucket respectively; the three independent test devices are different in structure, size, function and principle, the rain water bucket and the hydraulic characteristics thereof which are matched with the three independent test devices are required to be tested according to the standard record, the size and the weight of the three independent test devices are large, the occupied space is large, so that the test cost is high and the test efficiency is low; all the three independent test devices cannot form a closed loop for water supply and water drainage, namely cannot form water circulation, so that huge waste of water resources can be caused in the test process; the lack of explicit process parameters in the test steps described in the standard can lead to inaccurate test results, resulting in erroneous determination of the hydraulic characteristics of the rain water bucket. Therefore, the development of a system and a method for testing the hydraulic characteristics of a rain water bucket for building roof drainage is an urgent need of units such as rain water bucket manufacturers, scientific research institutions and detection institutions at present.

Disclosure of Invention

In order to solve the problems in the prior art, the invention provides a testing system for hydraulic characteristics of a rain bucket for drainage of a building roof, which is built on a testing platform and is connected with a control cabinet, wherein the testing system comprises a water storage tank, a variable frequency pump assembly, a water inlet pipe assembly, a testing water tank assembly, a drainage pipe assembly, two operation tables and a plurality of support columns, the water storage tank, the variable frequency pump assembly, the water inlet pipe assembly, the testing water tank assembly and the drainage pipe assembly are sequentially connected to form a closed loop for water inlet and drainage, the side surfaces of the two operation tables are fixedly connected with the testing platform, one end of each support column is fixedly connected with the testing system, and the other end of each support column is fixedly connected with the testing platform.

According to the invention, a test platform is built according to actual conditions, the test platform can be composed of a transverse platform, a longitudinal platform, a supporting platform and the like in various modes, and a plurality of supporting columns are dispersed at different positions and used for supporting a test system; the control cabinet is connected with the test system and used for controlling the operation of the test system, the control cabinet can realize precise switching of the frequency conversion pump frequency and the flow through the PLC module, the water supply flow in the test system is regulated to be in a balanced state, and test data are collected in real time.

Preferably, the water storage tank and variable frequency pump assembly comprises a water storage tank, a first variable frequency pump, a second variable frequency pump, a first telescopic connecting pipe, a second telescopic connecting pipe, a first gate valve, a second gate valve, a first check valve, a second check valve, a first sleeve and a second sleeve; the water storage tank, the first variable frequency pump and the second variable frequency pump are arranged on the concrete base; the side bottom of the water storage tank is sequentially connected with the first gate valve, the first telescopic connecting pipe, the first variable frequency pump and the first check valve through the connecting short pipe, the connecting bent pipe and the sealing flange, and the same side bottom of the water storage tank is sequentially connected with the second gate valve, the second telescopic connecting pipe, the second variable frequency pump and the second check valve through the connecting short pipe, the connecting bent pipe and the sealing flange.

In any of the above schemes, preferably, the first sleeve and the second sleeve vertically penetrate through the top surface of the water storage tank and are fixedly connected with the bottom surface of the water storage tank, and the bottom ends of the first sleeve and the second sleeve are respectively provided with two V-shaped drainage holes and a plurality of round drainage holes; the top surface of the water storage tank is provided with an inspection port, and the bottom of the side surface of the water storage tank is provided with a drain valve.

In the invention, the length of the water storage tank is not less than 3m, the width is not less than 2m, and the height is not less than 1.5m. The two variable frequency pumps with the same size are adopted, the measuring range of the first variable frequency pump is 0-40L/s, the measuring range of the second variable frequency pump is 0-60L/s, and one or two variable frequency pumps can be selected according to rain hoppers with different flow rates, so that the requirements of test precision can be met, and the purpose of energy conservation can be achieved. The diameters of the first sleeve and the second sleeve are 300mm.

In any of the above schemes, preferably, the water inlet pipe assembly comprises a first horizontal water inlet pipe, a vertical water inlet pipe, a second horizontal water inlet pipe, an annular water inlet pipe and six vertical water pipes which are sequentially connected from bottom to top; the two ends of the vertical water inlet pipe are respectively and vertically connected with the first transverse water inlet pipe and the second transverse water inlet pipe, the center position of one long side of the annular water inlet pipe is connected with one end of the second transverse water inlet pipe, and the annular water inlet pipe and the second transverse water inlet pipe are positioned on the same plane; four vertical water pipes are vertically arranged on the long side of the annular water inlet pipe connected with the second transverse water inlet pipe, wherein gate valves are respectively arranged on the two middle vertical water pipes, two vertical water pipes are vertically arranged on the other long side of the annular water inlet pipe, and gate valves are respectively arranged on the two vertical water pipes; and an electromagnetic flowmeter is arranged at the position of the vertical water inlet pipe close to the bottom of the vertical water inlet pipe.

In the invention, the diameters of the first transverse water inlet pipe, the vertical water inlet pipe, the second transverse water inlet pipe and the annular water inlet pipe are 300mm, and the engineering pressure is 1.6MPa; the length of the first transverse water inlet pipe, the height of the vertical water inlet pipe and the length of the second transverse water inlet pipe can be designed according to practical conditions, the distance between the centers of the two short side pipes of the annular water inlet pipe is 100-300mm greater than the length of the square test water tank, and the distance between the centers of the two long side pipes of the annular water inlet pipe is equal to the side length of the square formed by the centers of the six vertical water pipe mounting holes. The diameters of the six water standing pipes are 200mm, the engineering pressure is 1.6MPa, and the heights of the six water standing pipes are 500-1000mm. The distance between the electromagnetic flowmeter and the first transverse water inlet pipe is not less than three times of the diameter of the vertical water inlet pipe, the diameter of the electromagnetic flowmeter is 300mm, the engineering pressure is 1.6MPa, the dustproof and waterproof grade is IP68, and the measurement accuracy is 0.5%.

In any of the above aspects, preferably, the test tank assembly includes a test tank, a rectifying plate, and a liquid level sensor; the test water tank is a square tank body, a middle area of the bottom of the test water tank protrudes towards the inside of the test water tank to form a rectangular boss, and the rectifying plate is arranged on the rectangular boss and integrally formed with the rectangular boss; the edge of the rectifying plate is fixedly connected with the inner wall of the test water tank through a connecting piece, and a certain gap is formed between the edge of the rectifying plate and the inner wall of the test water tank.

In any of the above schemes, preferably, a square direct drainage type rain water bucket mounting hole is formed in the position of the rectangular boss located in the center of the test water tank, and an L-shaped side entry type rain water bucket mounting hole is formed in the position of the rectangular boss located at the edge of the test water tank; a first pressure taking hole and a second pressure taking hole are formed between the square direct-discharge type rain water bucket mounting hole and the L-shaped side-in type rain water bucket mounting hole, the first pressure taking hole is close to one side of the L-shaped side-in type rain water bucket mounting hole, and the second pressure taking hole is close to one side of the square direct-discharge type rain water bucket mounting hole; the first pressure taking hole and the second pressure taking hole are connected with the liquid level sensor.

In any of the above schemes, it is preferable that two standing water pipe mounting holes are symmetrically arranged on one side of the bottom of the test water tank, which is close to the L-shaped side-entry type rain water bucket mounting hole, four standing water pipe mounting holes are equidistantly arranged on one side of the bottom of the test water tank, which is far away from the L-shaped side-entry type rain water bucket mounting hole, the centers of the six standing water pipe mounting holes form a square, and the center of the square coincides with the center of the test water tank.

In the invention, the test water tank is a square tank body, the side length of which is not less than 2200mm and the height of which is 500-600mm. The length of the rectangular boss is 500-700mm smaller than that of the test water tank, the width is 600-1200mm, and the height is 80-120mm. The clearance formed by the edge of the rectifying plate and the inner wall of the test water tank is 80-120mm, and the radius of the rounding of the rectifying plate is 300mm. The side length of the square in-line rain bucket mounting hole is 500mm; the width of the L-shaped side-entering type rain water bucket installation hole is 430mm, the vertical height of the L shape is 260mm, and the horizontal length of the L shape is 160mm.

The centers of the six water standing pipe mounting holes form a square, and the vertical distances from the centers of the water standing pipes positioned at the four corners of the square to the inner wall of the test water tank are 300-400mm. The distance from the first pressure taking hole to the center of the square direct-discharge type rain water bucket installing hole is 650mm, and the distance from the second pressure taking hole to the inner wall of the testing water tank where the L-shaped side-entering type rain water bucket installing hole is located is 650mm. The measuring range of the liquid level sensor is 0-5kPa, and the precision is 0.25 level.

In any of the above aspects, preferably, the drain pipe assembly includes a first drain pipe, a second drain pipe, a first throttle valve, a second throttle valve, a first reducing flange, a second reducing flange, a drain riser, a transparent pipe, a first pressure sensor, a second pressure sensor, a first air supply pipe, and a second air supply pipe; the bottom of the first drain pipe is embedded into the first sleeve, the top end of the first drain pipe is sequentially connected with a first throttle valve, a first reducing flange, a drain vertical pipe and a transparent pipe from bottom to top, the top end of the transparent pipe is connected with a water outlet short pipe of a rainwater hopper, and the diameters of the water outlet short pipe, the transparent pipe and the drain vertical pipe are equal; the first pressure sensor and the second pressure sensor are sequentially arranged on the drainage vertical pipe from top to bottom; the first air supplementing pipe is arranged on the first drain pipe and forms a certain angle with the first drain pipe, and the air inlet plane of the first air supplementing pipe is flush with the top end of the first throttle valve.

In any of the above schemes, preferably, the bottom of the second drain pipe is embedded in the second sleeve, and the top end of the second drain pipe is sequentially connected with the second throttle valve and the second reducing flange from bottom to top; the second air supplementing pipe is arranged on the second drain pipe and forms a certain angle with the second drain pipe, and the air inlet plane of the second air supplementing pipe is flush with the top end of the second throttle valve.

In the invention, if the bottom of the rain water bucket is not provided with a water collecting bucket, the total length of the water outlet short pipe, the transparent pipe and the drainage vertical pipe is 3000mm, and if the bottom of the rain water bucket is provided with the water collecting bucket, the total length of 3000mm needs to contain the depth of the water collecting bucket; the length of the water outlet short pipe is determined by a rain water bucket to be detected, and is usually 10-20mm, and the diameter of the water outlet short pipe is not more than 150mm; the length of the transparent tube is 1000mm.

The diameter of the first drain pipe is 200mm, the length is determined according to practical conditions, and the length of the bottom of the first drain pipe embedded in the first sleeve is 500mm. The diameter of the first throttle valve is 200mm, and the diameter of the first reducing flange is 200mm. The diameter of the first air supplementing pipe is 200mm, and an included angle formed between the first air supplementing pipe and the first drain pipe is 30-45 degrees.

The diameter of the second drain pipe is 200mm, the length is determined according to the actual situation, and the length of the bottom of the second drain pipe embedded in the second sleeve pipe is 500mm. The diameter of the second throttle valve is 200mm, and the diameter of the second reducing flange is 200mm. The diameter of the second air supplementing pipe is 200mm, and an included angle formed between the second air supplementing pipe and the second drain pipe is 30-45 degrees.

The large-caliber throttling valve is directly adopted, the variable-diameter flange is connected to the upper end of the large-caliber throttling valve, the air supplementing pipe is connected to the lower end of the large-caliber throttling valve, the throttling valve and drain pipes below the throttling valve are not required to be replaced, only the variable-diameter flange, the drain stand pipe and the transparent pipe are required to be replaced, the installation workload is greatly reduced, the working efficiency is improved, and meanwhile, the standard requirements are met.

For the test of the hydraulic characteristics of the direct drainage type rain water bucket, two pressure sensors are required to be arranged on the drainage vertical pipe, a first pressure sensor and a second pressure sensor are sequentially arranged from top to bottom, the measuring ranges of the two pressure sensors are all +/-100 kPa, and the precision is 0.25 level. The first pressure sensor is arranged on the drainage vertical pipe, and the distance from the first pressure sensor to the top end of the water outlet short pipe is not less than 10 times of the diameter of the water outlet short pipe; the second pressure sensor is also arranged on the water draining vertical pipe, and the distance between the second pressure sensor and the first pressure sensor is not smaller than 10 times of the diameter of the water outlet short pipe. And for the test of the hydraulic characteristics of the side-entry rain water bucket, a pressure sensor is not needed.

According to the invention, the test water tank of the direct drainage type rain water bucket and the test water tank of the side inlet type rain water bucket are creatively combined into one test water tank, the size of the combined test water tank is increased, meanwhile, the bottom and the side surfaces of the test water tank are respectively provided with the direct drainage type rain water bucket mounting opening and the side inlet type rain water bucket mounting opening, and in the test process, a blind plate, a cover plate or a connecting pressing plate can be used for blocking, so that the effect of mutual noninterference is achieved. Meanwhile, an annular water inlet pipe is arranged below the test water tank, a water standing pipe is respectively connected to the positions, close to four corners, below the test water tank, two water standing pipes are connected to the middle position of the opposite side of the L-shaped side inlet type rainwater hopper mounting hole, and the four water standing pipes are controlled through a gate valve so as to meet the water supply requirements of different rainwater hoppers.

The test water tank, the transverse water inlet pipe, the vertical water inlet pipe, the annular water inlet pipe, the water outlet pipe, the water storage tank, the short connecting pipe and the like are all made of stainless steel materials, so that the high-flow strength requirement is met, the connection is easy, and the aging resistance is realized.

The invention also provides a method for testing the hydraulic characteristics of the rain water bucket for building roof drainage, which uses the system for testing the hydraulic characteristics of the rain water bucket for building roof drainage, wherein:

the method for testing the hydraulic characteristics of the direct drainage rain water bucket comprises the following steps in sequence:

step A: building a test system on a test platform according to design requirements, installing a direct-discharge type rain water bucket in a square direct-discharge type rain water bucket installation hole, fastening and sealing the direct-discharge type rain water bucket, sealing and connecting a water outlet short pipe at the bottom of the direct-discharge type rain water bucket with a transparent pipe at the top of a drain pipe assembly by using an auxiliary connecting piece, and sealing and blocking the L-shaped side-entry type rain water bucket installation hole; closing gate valves on two vertical water pipes positioned in the middle on the long side of the annular water inlet pipe connected with the second transverse water inlet pipe, and simultaneously opening gate valves on two vertical water pipes on the other long side of the annular water inlet pipe; injecting water into the water storage tank, wherein the water injection quantity is at least 2/3 of the volume of the water storage tank; and (B) step (B): starting a test system, opening the first variable frequency pump and/or the second variable frequency pump, enabling the test system to run for 3-5min, and checking the tightness and stability of the test system; after the inspection is finished and good tightness and stability of the test system are ensured, the first variable frequency pump and/or the second variable frequency pump are/is turned off, the water flow state in the transparent pipe is observed, when no water flow exists in the transparent pipe, the water level in the test water tank is at a relative zero water level, the display values of the liquid level sensor, the first pressure sensor and the second pressure sensor are cleared, and then a formal test process is carried out;

Step C: opening the first throttle valve to a full-open state, and opening the first variable frequency pump and/or the second variable frequency pump; while adjusting the flow of the first variable frequency pump and/or the second variable frequency pump, observing the water flow state in the transparent pipe and the water depth in front of the bucket measured by the liquid level sensor; when the water flow state in the transparent pipe is observed to reach full flow and the water depth before the bucket measured by the liquid level sensor is not more than 80% of the diameter of the water outlet short pipe of the in-line rainwater bucket, taking the flow of the first variable frequency pump and/or the second variable frequency pump at the moment as the maximum flow of the in-line rainwater bucket, and simultaneously recording the water depth before the bucket measured by the liquid level sensor at the moment;

step D: taking 1/3 of the maximum flow of the in-line rainwater hopper as the starting flow of the in-line rainwater hopper, and averaging 10 gradient flows between the maximum flow and the starting flow, wherein the 10 gradient flows comprise the maximum flow and the starting flow; firstly, downwards regulating 1 gradient flow from the maximum flow, observing the water flow state in the transparent pipe, at the moment, not fully flowing, slowly regulating the first throttle valve until the water flow state in the transparent pipe reaches full flow again, and recording the water depth in front of the bucket, which is measured by the liquid level sensor at the moment; then, continuously regulating down 1 gradient flow, observing the water flow state in the transparent pipe, at the moment, not fully flowing, continuously slowly regulating the first throttle valve until the water flow state in the transparent pipe reaches full flowing again, and recording the water depth before the bucket, which is measured by the liquid level sensor at the moment; and so on until the starting flow is adjusted downwards, and recording the depth of water in front of the bucket measured by the liquid level sensor when the starting flow is adjusted; after the test of the front water depth of the bucket corresponding to the 10 gradient flows is finished, drawing a relation curve of the flow of the in-line rainwater bucket and the front water depth of the bucket;

Step E: subtracting 10L/s from the maximum flow of the in-line rainwater hopper as the starting flow of the local resistance coefficient test of the in-line rainwater hopper, and taking 5 gradient flows between the maximum flow and the starting flow in an average or gradually reduced interval form, wherein the 5 gradient flows comprise the maximum flow and the starting flow; opening the first throttle valve to a fully open state; firstly, the starting flow of an in-line rainwater hopper is adjusted to the starting flow, and the front water depth, the pressure measured by a first pressure sensor and the pressure measured by a second pressure sensor measured by a liquid level sensor at the moment are recorded; then, 1 gradient flow is adjusted upwards from the starting point flow, and the water depth before the bucket, the pressure measured by the first pressure sensor and the pressure measured by the second pressure sensor measured by the liquid level sensor at the moment are recorded; and similarly, until the flow reaches the maximum flow, recording the depth of water in front of the bucket, which is measured by the liquid level sensor, the pressure measured by the first pressure sensor and the pressure measured by the second pressure sensor; after the front water depth and the pressure intensity of the bucket corresponding to the 5 gradient flows are tested, respectively obtaining local resistance coefficients corresponding to the 5 gradient flows by using a calculation formula of the local resistance coefficients of the in-line type rainwater bucket, and taking the value reaching a stable state as the local resistance coefficient of the final in-line type rainwater bucket;

Step F: and closing the testing system, and closing the first variable frequency pump and/or the second variable frequency pump to finish the testing of the hydraulic characteristics of the directly-discharged rainwater hopper.

The method for testing the hydraulic characteristics of the side-entry rain water bucket comprises the following steps in sequence:

step a: building a test system on a test platform according to design requirements, integrally translating a drainage vertical pipe above a first drainage pipe and a transparent pipe above a second drainage pipe, and hermetically connecting the bottom end of the drainage vertical pipe with a second reducing flange; the side-entering type rain water bucket is arranged in an L-shaped side-entering type rain water bucket mounting hole, the side-entering type rain water bucket mounting hole is fastened and sealed, a rain bearing bucket and a water outlet short pipe are sequentially connected below the side-entering type rain water bucket, the water outlet short pipe is connected with a transparent pipe in a sealing mode through an auxiliary connecting piece, and meanwhile the square direct-discharging type rain water bucket mounting hole is plugged; opening gate valves on two vertical water pipes positioned in the middle on the long side of the annular water inlet pipe connected with the second transverse water inlet pipe, and closing gate valves on two vertical water pipes on the other long side of the annular water inlet pipe; injecting water into the water storage tank, wherein the water injection quantity is at least 2/3 of the volume of the water storage tank;

step b: starting a test system, opening the first variable frequency pump and/or the second variable frequency pump, enabling the test system to run for 3-5min, and checking the tightness and stability of the test system; after the inspection is finished and good tightness and stability of the test system are ensured, the first variable frequency pump and/or the second variable frequency pump are/is closed, the water flow state in the transparent pipe is observed, when no water flow exists in the transparent pipe, the water level in the test water tank is at a relative zero water level, the display value of the liquid level sensor is cleared, and then a formal test process is carried out;

Step c: opening the second throttle valve to a full-open state, and opening the first variable frequency pump and/or the second variable frequency pump; while adjusting the flow of the first variable frequency pump and/or the second variable frequency pump, observing the water flow state in the transparent pipe and the water depth in front of the bucket measured by the liquid level sensor; when the state of water flow in the transparent pipe is not fully observed and the water depth in front of the bucket measured by the liquid level sensor is stable at the water level required by the building design, taking the flow of the first variable frequency pump and/or the second variable frequency pump at the moment as the maximum flow of the side-entering type rainwater bucket;

step d: and closing the testing system, and closing the first variable frequency pump and/or the second variable frequency pump to finish the testing of the hydraulic characteristics of the side-entry rain water bucket.

The invention relates to a system and a method for testing hydraulic characteristics of a rain water bucket for building roof drainage, which relate to a plurality of parameters including structural parameters and process parameters, and all the parameters have to cooperate with each other to achieve the expected technical effects of the invention. Especially, the structural parameters of the annular water inlet pipe and the vertical water pipe in the water inlet pipe assembly, the structural parameters of the test water tank assembly, the structural parameters of the transparent pipe, the drain vertical pipe, the air supplementing pipe and the pressure sensor in the drain pipe assembly and the like are very important, and the key parameters are matched and cooperate with each other to realize the combination of the hydraulic characteristic test device and the hydraulic characteristic test method of the direct drainage type rain water bucket and the side entry type rain water bucket.

The system and the method for testing the hydraulic characteristics of the rain water bucket for building roof drainage have the following beneficial effects:

(1) The test water tanks of the direct drainage type rain water bucket and the side inlet type rain water bucket are combined into one, a shared test water tank is formed, and the annular water inlet pipe and six vertical water pipes are designed below the test water tank so as to meet the water supply requirements of different rain water buckets, and meanwhile, the annular water inlet pipe plays a role in rectification, so that the working efficiency is improved.

(2) The variable frequency pump with different flow rates is adopted to play a role in energy conservation.

(3) The reducing flange and the air supplementing pipe are adopted, the drain pipes of the throttle valve and the parts below the throttle valve are not required to be replaced aiming at the rain hoppers with different calibers, and only the reducing flange and the connecting tail pipe are required to be replaced, so that the installation workload is greatly reduced, the working efficiency is improved, and the standard requirements are met.

(4) The device can provide stable water supply flow, simulate the working state of the rain bucket in the gutter when heavy rain falls, and accurately test the hydraulic characteristic of the rain bucket.

Drawings

FIG. 1 is a schematic diagram of the construction of a test system and test platform in a preferred embodiment of the system and method for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to the present invention;

FIG. 2 is a schematic diagram of the test system in the embodiment shown in FIG. 1;

FIG. 3 is a schematic diagram of the reservoir and variable frequency pump assembly of the embodiment of FIG. 1;

FIG. 4 is a top view of the reservoir and variable frequency pump assembly of the embodiment of FIG. 1;

FIG. 5 is a schematic view of the construction of the first and second sleeves inside the water reservoir of the embodiment of FIG. 1;

FIG. 6 is a schematic view of the water inlet pipe assembly of the embodiment of FIG. 1;

FIG. 7 is a schematic view of the structure of the test tank assembly of the embodiment of FIG. 1;

FIG. 8 is a schematic view of the test tank assembly of the embodiment of FIG. 1 at an alternative angle;

FIG. 9 is a bottom view of the test sink assembly of the embodiment of FIG. 1;

FIG. 10 is a schematic view of the drain pipe assembly of the embodiment of FIG. 1;

FIG. 11 is a graph showing the flow rate of the in-line rain water bucket versus the depth of water in front of the bucket in the embodiment of FIG. 1.

The reference numerals in the drawings indicate: the test system A and the test platform B;

1-a water storage tank and variable frequency pump assembly, 101-a water storage tank, 102-a first variable frequency pump, 103-a second variable frequency pump, 104-a first telescopic connecting pipe, 105-a second telescopic connecting pipe, 106-a first gate valve, 107-a second gate valve, 108-a first check valve, 109-a second check valve, 110-a first sleeve, 111-a second sleeve, 112-a concrete base, 113-a V-shaped drain hole, 114-a round drain hole, 115-a check port and 116-a drain valve;

2-a water inlet pipe assembly, 201-a first transverse water inlet pipe, 202-a vertical water inlet pipe, 203-a second transverse water inlet pipe, 204-an annular water inlet pipe, 205-a vertical water pipe, 206-a gate valve, 207-an electromagnetic flowmeter;

3-test water tank components, 301-test water tanks, 302-rectifying plates, 303-liquid level sensors, 304-rectangular bosses, 305-connecting pieces, 306-square in-line rain bucket mounting holes, 307-L-shaped side-in rain bucket mounting holes, 308-first pressure taking holes, 309-second pressure taking holes and 310-standing water pipe mounting holes;

4-drain pipe assembly, 401-first drain pipe, 402-second drain pipe, 403-first throttle valve, 404-second throttle valve, 405-first reducing flange, 406-second reducing flange, 407-drain riser, 408-transparent pipe, 409-first pressure sensor, 410-second pressure sensor, 411-first air make-up pipe, 412-second air make-up pipe, 413-outlet spool;

5-an operation table;

6-supporting columns.

Detailed Description

For a further understanding of the present invention, the present invention will be described in detail with reference to the following examples.

Embodiment one:

as shown in fig. 1-2, according to a preferred embodiment of the system for testing hydraulic characteristics of a rain water bucket for drainage of a building roof of the present invention, the testing system a is built on a testing platform B and is connected with a control cabinet, the testing system a includes a water storage tank and a variable frequency pump assembly 1, a water inlet pipe assembly 2, a testing water tank assembly 3, a water outlet pipe assembly 4, two operation tables 5 and a plurality of support columns 6, the water storage tank and the variable frequency pump assembly 1, the water inlet pipe assembly 2, the testing water tank assembly 3 and the water outlet pipe assembly 4 are sequentially connected to form a closed loop for water inlet and drainage, the lateral surfaces of the two operation tables 5 are fixedly connected with the testing platform B, one end of the plurality of support columns 6 is fixedly connected with the testing system a, and the other end is fixedly connected with the testing platform B.

In the embodiment, the test platform consists of a transverse platform, a longitudinal platform, a support platform and the like in various modes, and a plurality of support columns are dispersed at different positions and used for supporting the test system; the control cabinet is connected with the test system and used for controlling the operation of the test system, adjusting the water supply flow in the test system to a balance state and collecting test data in real time.

As shown in fig. 3-5, the water tank and variable frequency pump assembly 1 comprises a water tank 101, a first variable frequency pump 102, a second variable frequency pump 103, a first telescopic connection pipe 104, a second telescopic connection pipe 105, a first gate valve 106, a second gate valve 107, a first check valve 108, a second check valve 109, a first sleeve 110 and a second sleeve 111; the water storage tank 101, the first variable frequency pump 102 and the second variable frequency pump 103 are arranged on a concrete base 112; the side bottom of the water storage tank 101 is sequentially connected with the first gate valve 106, the first telescopic connecting pipe 104, the first variable frequency pump 102 and the first check valve 108 through a short connecting pipe, a connecting bent pipe and a sealing flange, and the same side bottom of the water storage tank 101 is sequentially connected with the second gate valve 107, the second telescopic connecting pipe 105, the second variable frequency pump 103 and the second check valve 109 through a short connecting pipe, a connecting bent pipe and a sealing flange.

The first sleeve 110 and the second sleeve 111 vertically penetrate through the top surface of the water storage tank 101 and are fixedly connected with the bottom surface of the water storage tank 101, and two V-shaped drain holes 113 and a plurality of circular drain holes 114 are respectively arranged at the bottom ends of the first sleeve 110 and the second sleeve 111; an inspection port 115 is formed in the top surface of the water storage tank 101, and a drain valve 116 is formed in the bottom of the side surface of the water storage tank 101.

In this embodiment, the length of the water storage tank is 3m, the width is 2m, and the height is 1.5m. The two variable frequency pumps with the same size are adopted, the range of the first variable frequency pump is 0-40L/s, the range of the second variable frequency pump is 0-60L/s, and one or two variable frequency pumps can be selected according to the rain hoppers with different flow rates. The diameters of the first sleeve and the second sleeve are 300mm.

As shown in fig. 6, the water inlet pipe assembly 2 comprises a first horizontal water inlet pipe 201, a vertical water inlet pipe 202, a second horizontal water inlet pipe 203, an annular water inlet pipe 204 and six water standing pipes 205 which are sequentially connected from bottom to top; the two ends of the vertical water inlet pipe 202 are respectively and vertically connected with the first transverse water inlet pipe 201 and the second transverse water inlet pipe 203, the center position of one long side of the annular water inlet pipe 204 is connected with one end of the second transverse water inlet pipe 203, and the annular water inlet pipe 204 and the second transverse water inlet pipe 203 are positioned on the same plane; four vertical water pipes 205 are vertically arranged on the long side of the annular water inlet pipe 204 connected with the second transverse water inlet pipe 203, wherein gate valves 206 are respectively arranged on the two vertical water pipes 205 positioned in the middle, two vertical water pipes 205 are vertically arranged on the other long side of the annular water inlet pipe 204, and gate valves 206 are respectively arranged on the two vertical water pipes 205; an electromagnetic flowmeter 207 is arranged at a position of the vertical water inlet pipe 202 close to the bottom of the vertical water inlet pipe.

In the embodiment, the diameters of the first transverse water inlet pipe, the vertical water inlet pipe, the second transverse water inlet pipe and the annular water inlet pipe are 300mm, and the engineering pressure is 1.6MPa; the height of the vertical water inlet pipe is about 6000mm, and the length of the second transverse water inlet pipe is about 3000 mm; the distance between the centers of the two short side pipes of the annular water inlet pipe is 100mm greater than the length of the square test water tank, and the distance between the centers of the two long side pipes of the annular water inlet pipe is equal to the side length of the square formed by the centers of the six vertical water pipe mounting holes. The diameters of the six water standing pipes are 200mm, the engineering pressure is 1.6MPa, and the heights of the six water standing pipes are 500mm. The distance between the electromagnetic flowmeter and the first horizontal water inlet pipe is three times the diameter of the vertical water inlet pipe, namely 900mm, the diameter of the electromagnetic flowmeter is 300mm, the engineering pressure is 1.6MPa, the dustproof and waterproof grade is IP68, and the measurement accuracy is 0.5%.

As shown in fig. 7-9, the test tank assembly 3 includes a test tank 301, a rectifying plate 302, and a liquid level sensor 303; the test water tank 301 is a square tank body, a middle area at the bottom of the test water tank 301 protrudes towards the inside of the test water tank 301 to form a rectangular boss 304, and the rectifying plate 302 is arranged on the rectangular boss 304 and is integrally formed with the rectangular boss 304; the edge of the rectifying plate 302 is fixedly connected with the inner wall of the test water tank 301 through a connecting piece 305, and a certain gap is formed between the edge of the rectifying plate 302 and the inner wall of the test water tank 301.

A square direct drainage type rain water bucket mounting hole 306 is formed in the position, located in the center of the test water tank 301, of the rectangular boss 304, and an L-shaped side inlet type rain water bucket mounting hole 307 is formed in the position, located at the edge of the test water tank 301, of the rectangular boss 304; a first pressure taking hole 308 and a second pressure taking hole 309 are arranged between the square direct-discharge type rain water bucket mounting hole 306 and the L-shaped side-in type rain water bucket mounting hole 307, the first pressure taking hole 308 is close to one side of the L-shaped side-in type rain water bucket mounting hole 307, and the second pressure taking hole 309 is close to one side of the square direct-discharge type rain water bucket mounting hole 306; the first pressure-taking hole 308 and the second pressure-taking hole 309 are connected with the liquid level sensor 303.

Two water standing pipe mounting holes 310 are symmetrically formed in the bottom of the test water tank 301 on the side, close to the L-shaped side-entry type rain water bucket mounting hole 307, four water standing pipe mounting holes 310 are formed in the bottom of the test water tank 301 on the side, far away from the L-shaped side-entry type rain water bucket mounting hole 307, of the four water standing pipe mounting holes 310 at equal distances, the centers of the six water standing pipe mounting holes 310 form a square, and the centers of the square coincide with the center of the test water tank 301.

In this embodiment, the test water tank is a square tank body, and the side length is 2200mm and the height is 600mm. The length of the rectangular boss is 500mm smaller than that of the test water tank, the width is 600mm, and the height is 120mm. The clearance formed by the edge of the rectifying plate and the inner wall of the test water tank is 80mm, and the radius of the rounding of the rectifying plate is 300mm. The side length of the square in-line rain bucket mounting hole is 500mm; the width of the L-shaped side-entering type rain water bucket installation hole is 430mm, the vertical height of the L shape is 260mm, and the horizontal length of the L shape is 160mm. The centers of the six water standing pipe mounting holes form a square, and the vertical distances from the centers of the water standing pipes positioned at four corners of the square to the inner wall of the test water tank are 300mm. The distance from the first pressure taking hole to the center of the square direct-discharge type rain water bucket installing hole is 650mm, and the distance from the second pressure taking hole to the inner wall of the testing water tank where the L-shaped side-entering type rain water bucket installing hole is located is 650mm. The measuring range of the liquid level sensor is 0-5kPa, and the precision is 0.25 level.

As shown in fig. 10, the drain pipe assembly 4 includes a first drain pipe 401, a second drain pipe 402, a first throttle valve 403, a second throttle valve 404, a first reducing flange 405, a second reducing flange 406, a drain riser 407, a transparent pipe 408, a first pressure sensor 409, a second pressure sensor 410, a first air make-up pipe 411, and a second air make-up pipe 412; the bottom of the first drain pipe 401 is embedded in the first sleeve 110, the top end of the first drain pipe 401 is sequentially connected with a first throttle valve 403, a first reducing flange 405, a drain vertical pipe 407 and a transparent pipe 408 from bottom to top, the top end of the transparent pipe 408 is connected with a water outlet short pipe 413 of a rainwater hopper, and the diameters of the water outlet short pipe 413, the transparent pipe 408 and the drain vertical pipe 407 are equal; the first pressure sensor 409 and the second pressure sensor 410 are sequentially disposed on the drain riser 407 from top to bottom; the first air supplementing pipe 411 is disposed on the first drain pipe 401 and forms a certain angle with the first drain pipe 401, and an air inlet plane of the first air supplementing pipe 411 is flush with the top end of the first throttle valve 403.

The bottom of the second drain pipe 402 is embedded in the second sleeve 111, and the top end of the second drain pipe 402 is sequentially connected with a second throttle valve 404 and a second reducing flange 406 from bottom to top; the second air supplementing pipe 412 is disposed on the second drain pipe 402 and forms a certain angle with the second drain pipe 402, and an air inlet plane of the second air supplementing pipe 412 is flush with a top end of the second throttle valve 404.

In this embodiment, there is not the water catch bowl in the bottom of rainwater fill, and the total length of play water nozzle stub, transparent pipe and drainage riser is 3000mm, and the length of play water nozzle stub is 100mm, and the diameter of play water nozzle stub is 100mm, and the length of transparent pipe is 1000mm, and the length of drainage riser is 1900mm.

The diameter of the first drain pipe is 200mm, and the length of the bottom of the first drain pipe embedded into the first sleeve pipe is 500mm; the diameter of the first throttle valve is 200mm, and the diameter of the first reducing flange is 200mm; the diameter of the first air supplementing pipe is 200mm, and an included angle formed between the first air supplementing pipe and the first drain pipe is 30 degrees. The diameter of the second drain pipe is 200mm, and the length of the bottom of the second drain pipe embedded into the second sleeve pipe is 500mm; the diameter of the second throttle valve is 200mm, and the diameter of the second reducing flange is 200mm; the diameter of the second air supplementing pipe is 200mm, and an included angle formed between the second air supplementing pipe and the second drain pipe is 30 degrees.

For the test of the hydraulic characteristics of the direct drainage type rain water bucket, two pressure sensors are required to be arranged on the drainage vertical pipe, a first pressure sensor and a second pressure sensor are sequentially arranged from top to bottom, the measuring ranges of the two pressure sensors are all +/-100 kPa, and the precision is 0.25 level. The first pressure sensor is arranged on the drainage vertical pipe, and the distance from the first pressure sensor to the top end of the water outlet short pipe is 15.5 times of the diameter of the water outlet short pipe, namely 1550mm; a second pressure sensor is also provided on the drain riser and the distance between the second pressure sensor and the first pressure sensor is 11.7 times the diameter of the outlet stub, i.e. 1170mm. And for the test of the hydraulic characteristics of the side-entry rain water bucket, a pressure sensor is not needed.

According to the embodiment, the test water tank of the direct drainage type rain water bucket and the test water tank of the side inlet type rain water bucket are combined into one test water tank creatively, the size of the combined test water tank is increased, meanwhile, the direct drainage type rain water bucket mounting opening and the side inlet type rain water bucket mounting opening are respectively formed in the bottom and the side face of the test water tank, and in the test process, a blind plate, a cover plate or a connecting pressing plate can be used for blocking, so that the effect of mutual noninterference is achieved. Meanwhile, an annular water inlet pipe is arranged below the test water tank, a water standing pipe is respectively connected to the positions, close to four corners, below the test water tank, two water standing pipes are connected to the middle position of the opposite side of the L-shaped side inlet type rainwater hopper mounting hole, and the four water standing pipes are controlled through a gate valve so as to meet the water supply requirements of different rainwater hoppers.

The embodiment also provides a method for testing hydraulic characteristics of a rain water bucket for building roof drainage, which uses the system for testing hydraulic characteristics of the rain water bucket for building roof drainage, wherein:

The above test results show that the flow and the front water depth of the in-line rain water bucket are shown in table 1, the test curve is shown in fig. 11, and the local resistance coefficient of the in-line rain water bucket is shown in table 2. As can be seen from tables 1 and 2, the maximum flow rate of the in-line rainwater hopper is 43.27L/s, the depth of water in front of the hopper corresponding to the maximum flow rate is 76.58mm, and the local resistance coefficient is 1.02.

TABLE 1 test data of flow and front depth of in-line rain bucket

Test numbering	Flow (L/s)	Bucket front water depth (mm)
			01#	15.31	44.29
02#	19.07	47.98
			03#	22.92	49.83
04#	26.87	54.72
			05#	31.38	59.05
06#	34.04	60.38
			07#	36.42	64.62
08#	38.11	65.47
			09#	41.10	67.36
10#	43.27	76.58
			11#	44.40	121.97

Table 2 test data of local resistance coefficient of in-line rain hoppers

Parameters (parameters)	01#	02#	03#	04#	05#
						Q(L/s)	43.27	41.59	40.58	37.99	33.69
d _j (mm)	100.4	100.4	100.4	100.4	100.4
						d(mm)	101.2	101.2	101.2	101.2	101.2
V(m/s)	5.47	5.26	5.13	4.80	4.26
						Vout(m/s)	5.38	5.17	5.05	4.73	4.19
L ₁ (mm)	1550	1550	1550	1550	1550
						L ₂ (mm)	1170	1170	1170	1170	1170
p ₁ (Pa)	-15307	-14465	-13323	-11369	-10125
						p ₂ (Pa)	-4963	-3947	-3030	-1076	-419
λ	0.007	0.006	0.008	0.009	0.017
						a(mm)	0	0	0	0	0
h(mm)	76.58	71.72	70.65	70.65	64.59
						ξ	1.02	1.14	1.14	1.27	1.66

The calculation formula of the local resistance coefficient of the direct drainage type rain water bucket isWherein the flow rate is calculated as +.>And->The calculation formula of the on-way resistance coefficient is as followsWherein: zeta—local drag coefficient, dimensionless; a, the depth of a water collecting bucket is mm; h, the depth of water in front of the bucket is mm; p is p ₁ -the relative pressure measured by the first pressure sensor, pa; p is p ₂ -the relative pressure, pa, measured by the second pressure sensor; ρ -density of water, 1000kg/m ³ The method comprises the steps of carrying out a first treatment on the surface of the g-gravity acceleration, 9.81m/s ² ；L ₁ -distance from the first pressure sensor to the top end of the water outlet short pipe, mm; l (L) ₂ -distance between two pressure sensors, mm; v-average flow rate of water in the drain stand pipe, m/s; v (V) _out -average flow rate of water in the outlet pipe spool, m/s; q-water inflow, L/s; d, the inner diameter of the short water outlet pipe is mm; d, d _j -inner diameter of the drainage riser, mm.

The maximum flow of the side inlet type rainwater hopper is 29.2L/m, and the water level required by the building design is 250mm, namely the roof overflow water level is 250mm.

The system and the method for testing the hydraulic characteristics of the rain water bucket for building roof drainage relate to a plurality of parameters, including structural parameters and process parameters, and the parameters must be cooperated. Especially, the structural parameters of the annular water inlet pipe and the vertical water pipe in the water inlet pipe assembly, the structural parameters of the test water tank assembly, the structural parameters of the transparent pipe, the drain vertical pipe, the air supplementing pipe and the pressure sensor in the drain pipe assembly and the like are very important, and the key parameters are matched and cooperate with each other to realize the combination of the hydraulic characteristic test device and the hydraulic characteristic test method of the direct drainage type rain water bucket and the side entry type rain water bucket.

The system and the method for testing the hydraulic characteristics of the rainwater hopper for building roof drainage have the following beneficial effects: the test water tanks of the direct drainage type rain water bucket and the side inlet type rain water bucket are combined into a whole to form a shared test water tank, and an annular water inlet pipe and six vertical water pipes are designed below the test water tank so as to meet the water supply requirements of different rain water buckets, and meanwhile, the annular water inlet pipe plays a role in rectification, so that the working efficiency is improved; the variable frequency pump with different flow rates is adopted to play a role in energy conservation; the reducing flange and the air supplementing pipe are adopted, the drain pipes of the throttle valve and the parts below the throttle valve are not required to be replaced aiming at the rain hoppers with different calibers, and only the reducing flange and the connecting tail pipe are required to be replaced, so that the installation workload is greatly reduced, the working efficiency is improved, and the standard requirements are met.

Embodiment two:

according to another preferred embodiment of the system and the method for testing the hydraulic characteristics of the rain water bucket for building roof drainage, the structure, the testing steps, the technical principle, the beneficial effects and the like of the testing system are basically the same as those of the first embodiment, except that:

the length of the water storage tank is 5m, the width is 3m, the height is 2m, the measuring range of the first variable frequency pump is 0-40L/s, the measuring range of the second variable frequency pump is 0-60L/s, and the diameters of the first sleeve and the second sleeve are 300mm.

The diameters of the first transverse water inlet pipe, the vertical water inlet pipe, the second transverse water inlet pipe and the annular water inlet pipe are 300mm; the height of the vertical water inlet pipe is about 5500mm, and the length of the second transverse water inlet pipe is about 2500 mm; the distance between the centers of the two short side pipes of the annular water inlet pipe is 300mm greater than the length of the square test water tank, and the distance between the centers of the two long side pipes of the annular water inlet pipe is equal to the side length of the square formed by the centers of the six vertical water pipe mounting holes; the diameters of the six standing water pipes are 200mm and the heights are 800mm.

The side length of the test water tank is 2500mm, and the height of the test water tank is 500mm; the length of the rectangular boss is 700mm smaller than that of the test water tank, the width is 1000mm, and the height is 120mm; the gap formed between the edge of the rectifying plate and the inner wall of the test water tank is 120mm. The side length of the square in-line rain bucket mounting hole is 500mm; the width of the L-shaped side-entering type rain water bucket installation hole is 430mm, the vertical height of the L shape is 260mm, and the horizontal length of the L shape is 160mm. The centers of the six water standing pipe mounting holes form a square, and the vertical distances from the centers of the water standing pipes positioned at four corners of the square to the inner wall of the test water tank are 400mm. The distance from the first pressure taking hole to the center of the square direct-discharge type rain water bucket installing hole is 650mm, and the distance from the second pressure taking hole to the inner wall of the testing water tank where the L-shaped side-entering type rain water bucket installing hole is located is 650mm.

The bottom of the rainwater hopper is not provided with a water collecting hopper, the total length of the water outlet short pipe, the transparent pipe and the drainage vertical pipe is 3000mm, the length of the water outlet short pipe is 100mm, the diameter of the water outlet short pipe is 100mm, the length of the transparent pipe is 1000mm, and the length of the drainage vertical pipe is 1900mm. The diameters of the first drain pipe and the second drain pipe are 200mm, and the lengths of the bottoms of the first drain pipe and the second drain pipe embedded in the sleeve are 500mm; the diameters of the first throttle valve, the second throttle valve, the first reducing flange and the second reducing flange are 200mm; the diameter of the first air supplementing pipe is 200mm, and an included angle formed between the first air supplementing pipe and the first drain pipe is 45 degrees; the diameter of the second air supplementing pipe is 200mm, and an included angle formed between the second air supplementing pipe and the second drain pipe is 45 degrees.

For the test of the hydraulic characteristics of the direct drainage type rain water bucket, two pressure sensors are required to be arranged. The first pressure sensor is arranged on the drainage vertical pipe, and the distance from the first pressure sensor to the top end of the water outlet short pipe is 14 times the diameter of the water outlet short pipe, namely 1400mm; a second pressure sensor is also provided on the drain riser and the distance between the second pressure sensor and the first pressure sensor is 13 times the diameter of the outlet stub, i.e. 1300mm.

The specific description is as follows: the technical scheme of the invention relates to a plurality of parameters, and the beneficial effects and remarkable progress of the invention can be obtained by comprehensively considering the synergistic effect among the parameters. In addition, the value ranges of all the parameters in the technical scheme are obtained through a large number of tests, and aiming at each parameter and the mutual combination of all the parameters, the inventor records a large number of test data, and the specific test data are not disclosed herein for a long period of time.

It will be appreciated by those skilled in the art that the system and method for testing hydraulic characteristics of a rain water bucket for drainage of building roofs of the present invention includes any combination of the above-described summary of the invention and detailed description of the invention and the parts shown in the drawings, which is limited in space and is not described in detail in order to simplify the description. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a building roof drainage is with test system of rainwater fill hydraulic property, test system builds on test platform to be connected with the switch board, its characterized in that: the test system comprises a water storage tank, a variable frequency pump assembly, a water inlet pipe assembly, a test water tank assembly, a water outlet pipe assembly, two operation tables and a plurality of support columns, wherein the water storage tank, the variable frequency pump assembly, the water inlet pipe assembly, the test water tank assembly and the water outlet pipe assembly are sequentially connected to form a closed loop for water inlet and water outlet, the side surfaces of the operation tables are fixedly connected with the test platform, and one ends of the support columns are fixedly connected with the test system, and the other ends of the support columns are fixedly connected with the test platform.

2. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 1, wherein: the water storage tank and variable frequency pump assembly comprises a water storage tank, a first variable frequency pump, a second variable frequency pump, a first telescopic connecting pipe, a second telescopic connecting pipe, a first gate valve, a second gate valve, a first check valve, a second check valve, a first sleeve and a second sleeve; the water storage tank, the first variable frequency pump and the second variable frequency pump are arranged on the concrete base; the side bottom of the water storage tank is sequentially connected with the first gate valve, the first telescopic connecting pipe, the first variable frequency pump and the first check valve through the connecting short pipe, the connecting bent pipe and the sealing flange, and the same side bottom of the water storage tank is sequentially connected with the second gate valve, the second telescopic connecting pipe, the second variable frequency pump and the second check valve through the connecting short pipe, the connecting bent pipe and the sealing flange.

3. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 2, wherein: the first sleeve and the second sleeve vertically penetrate through the top surface of the water storage tank and are fixedly connected with the bottom surface of the water storage tank, and two V-shaped drainage holes and a plurality of circular drainage holes are respectively formed in the bottom ends of the first sleeve and the second sleeve; the top surface of the water storage tank is provided with an inspection port, and the bottom of the side surface of the water storage tank is provided with a drain valve.

4. A system for testing the hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 3, wherein: the water inlet pipe assembly comprises a first transverse water inlet pipe, a vertical water inlet pipe, a second transverse water inlet pipe, an annular water inlet pipe and six vertical water pipes which are sequentially connected from bottom to top; the two ends of the vertical water inlet pipe are respectively and vertically connected with the first transverse water inlet pipe and the second transverse water inlet pipe, the center position of one long side of the annular water inlet pipe is connected with one end of the second transverse water inlet pipe, and the annular water inlet pipe and the second transverse water inlet pipe are positioned on the same plane; four vertical water pipes are vertically arranged on the long side of the annular water inlet pipe connected with the second transverse water inlet pipe, wherein gate valves are respectively arranged on the two middle vertical water pipes, two vertical water pipes are vertically arranged on the other long side of the annular water inlet pipe, and gate valves are respectively arranged on the two vertical water pipes; and an electromagnetic flowmeter is arranged at the position of the vertical water inlet pipe close to the bottom of the vertical water inlet pipe.

5. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 4, wherein: the test water tank assembly comprises a test water tank, a rectifying plate and a liquid level sensor; the test water tank is a square tank body, a middle area of the bottom of the test water tank protrudes towards the inside of the test water tank to form a rectangular boss, and the rectifying plate is arranged on the rectangular boss and integrally formed with the rectangular boss; the edge of the rectifying plate is fixedly connected with the inner wall of the test water tank through a connecting piece, and a certain gap is formed between the edge of the rectifying plate and the inner wall of the test water tank.

6. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 5, wherein: a square direct-discharge type rain water bucket mounting hole is formed in the position, located in the center of the test water tank, of the rectangular boss, and an L-shaped side-entering type rain water bucket mounting hole is formed in the position, located at the edge of the test water tank, of the rectangular boss; a first pressure taking hole and a second pressure taking hole are formed between the square direct-discharge type rain water bucket mounting hole and the L-shaped side-in type rain water bucket mounting hole, the first pressure taking hole is close to one side of the L-shaped side-in type rain water bucket mounting hole, and the second pressure taking hole is close to one side of the square direct-discharge type rain water bucket mounting hole; the first pressure taking hole and the second pressure taking hole are connected with the liquid level sensor.

7. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 6, wherein: two water standing pipe mounting holes are symmetrically formed in one side, close to the L-shaped side inlet type rain water bucket mounting holes, of the bottom of the test water tank, four water standing pipe mounting holes are formed in one side, far away from the L-shaped side inlet type rain water bucket mounting holes, of the bottom of the test water tank at equal distance, the centers of the six water standing pipe mounting holes form a square, and the centers of the square coincide with the centers of the test water tank.

8. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 7, wherein: the drain pipe assembly comprises a first drain pipe, a second drain pipe, a first throttle valve, a second throttle valve, a first reducing flange, a second reducing flange, a drain vertical pipe, a transparent pipe, a first pressure sensor, a second pressure sensor, a first air supplementing pipe and a second air supplementing pipe; the bottom of the first drain pipe is embedded into the first sleeve, the top end of the first drain pipe is sequentially connected with a first throttle valve, a first reducing flange, a drain vertical pipe and a transparent pipe from bottom to top, the top end of the transparent pipe is connected with a water outlet short pipe of a rainwater hopper, and the diameters of the water outlet short pipe, the transparent pipe and the drain vertical pipe are equal; the first pressure sensor and the second pressure sensor are sequentially arranged on the drainage vertical pipe from top to bottom; the first air supplementing pipe is arranged on the first drain pipe and forms a certain angle with the first drain pipe, and the air inlet plane of the first air supplementing pipe is flush with the top end of the first throttle valve.

9. The system for testing hydraulic characteristics of a rain bucket for drainage of a building roof according to claim 8, wherein: the bottom of the second drain pipe is embedded in the second sleeve, and the top end of the second drain pipe is sequentially connected with a second throttle valve and a second reducing flange from bottom to top; the second air supplementing pipe is arranged on the second drain pipe and forms a certain angle with the second drain pipe, and the air inlet plane of the second air supplementing pipe is flush with the top end of the second throttle valve.

10. A method for testing hydraulic characteristics of a rain bucket for building roof drainage is characterized by comprising the following steps of: a test system for hydraulic characteristics of a rain bucket for drainage of building roofs according to any one of claims 1 to 9, wherein,

Step F: closing the testing system, and closing the first variable frequency pump and/or the second variable frequency pump to finish the test of the hydraulic characteristics of the directly-discharged rainwater hopper;