CN111578026A - Under-pressure cutting construction method for water supply pipelines made of different materials - Google Patents
Under-pressure cutting construction method for water supply pipelines made of different materials Download PDFInfo
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- CN111578026A CN111578026A CN202010274967.4A CN202010274967A CN111578026A CN 111578026 A CN111578026 A CN 111578026A CN 202010274967 A CN202010274967 A CN 202010274967A CN 111578026 A CN111578026 A CN 111578026A
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- supply pipeline
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L41/00—Branching pipes; Joining pipes to walls
- F16L41/04—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor
- F16L41/06—Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow in pipes or hoses
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- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a construction method for cutting water supply pipelines made of different materials under pressure, which comprises the following steps: s1) selecting a cutting and collision position of the main water supply pipeline according to a pipeline drawing and the surrounding environment, excavating the covering soil at the cutting and collision position of the main water supply pipeline until the covering soil is exposed out of the main water supply pipeline, and continuously excavating downwards from the bottom of the main water supply pipeline to form a cutting and collision working well with a designed depth; s2) sleeving the anchor ear in the connecting sleeve at the position of the cutting and collision port of the main water supply pipeline, and installing the connecting flange in the connecting sleeve towards the direction of the pipeline to be connected; s3) filling the gap between the hoop and the main water supply pipeline; s4) butting one end of the gate valve with the connecting flange, and installing the rhinestone at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline; s5) opening the gate valve, starting the water drill to open a hole in the main water supply pipeline, withdrawing the water drill after the hole is opened, and closing the gate valve; s6) splicing and installing the pipeline to be connected with the other end of the gate valve.
Description
Technical Field
The invention relates to the technical field of subway construction, in particular to a construction method for cutting water supply pipelines made of different materials under pressure.
Background
In the construction process of the subway, the subway needs to pass through a residential gathering area frequently, the construction area is close to residential and commercial building, the surrounding environment is complex, underground pipelines are distributed, and considerable difficulty is increased for the migration and reconstruction construction of the subway early-stage pipelines; wherein because old water supply main pipeline is plain concrete pipe usually, if take traditional drilling, pipe laying, concrete encapsulation construction then need to stop water for many days, will influence nearly every family daily drinking water in this process, and at the cutover in-process, the gesture control degree of difficulty is big, very easily causes water supply main pipeline seepage water, the scheduling problem that breaks.
Disclosure of Invention
The invention provides a construction method for cutting under pressure water supply pipelines made of different materials, which solves the problem of connection among pipelines made of different materials and effectively shortens the construction period; the water pressure operation can be carried out without stopping the water supply in the process of cutting the main water supply pipeline, so that the adverse effect on nearby residents is reduced to the maximum extent; flexible construction, convenient operation, wide application range and suitability for popularization and application.
The invention provides a construction method for cutting under pressure water supply pipelines made of different materials, which comprises the following steps: s1) selecting a cutting and butting position of the main water supply pipeline according to a pipeline drawing and the surrounding environment, excavating the covering soil at the cutting and butting position of the main water supply pipeline until the main water supply pipeline is exposed, and continuously excavating downwards from the pipe bottom of the main water supply pipeline to form a cutting and butting working well with a designed depth; s2) sleeving a hoop in a connecting sleeve at the position of the cutting and collision port of the main water supply pipeline, and installing a connecting flange in the connecting sleeve towards the direction of a pipeline to be connected; s3) filling the gap between the hoop and the main water supply pipeline; s4) butting one end of a gate valve with the connecting flange, and installing a rhinestone at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline; s5) opening the gate valve, starting the rhinestones to open holes in the main water supply pipeline, withdrawing the rhinestones after the holes are opened, and closing the gate valve; s6) splicing and installing the pipe to be connected and the other end of the gate valve.
Preferably, in step S1), excavating the casing soil at the position of the main water supply pipe cutting collision mouth until exposing the main water supply pipe, and further excavating downwards from the bottom of the main water supply pipe to form a cutting working well with a designed depth, including: when the design depth of the cutting and jointing working well is less than or equal to a first depth, excavating in a slope releasing mode; and when the design depth of the cutting-connecting working well is greater than the first depth, excavating in a supporting mode.
Preferably, the step S1) further includes: excavating the covering soil at the position of the cutting and contacting port of the main water supply pipeline in a manual excavation mode so as to expose the main water supply pipeline; and after the main water supply pipeline is exposed, cleaning and washing sludge on the surface of the main water supply pipeline.
Preferably, in the step S2), the connection kit is prepared according to the diameters of the main water supply pipeline and the pipeline to be connected; the diameter of the hoop in the connecting kit is larger than that of the position of the cutting and jointing collision port of the main water supply pipeline; the diameter of the connecting flange in the connecting kit is equal to the diameter of the pipeline to be connected.
Preferably, the hoop is made of steel plates through splicing and welding; and installing the connecting flange on the opening of the side wall of the welded steel plate hoop to form the connecting suite.
Preferably, in step S3), the filling the gap between the anchor ear and the main water supply pipe includes: filling hemp ropes into gaps between the hoops and the main water supply pipeline; and after the hemp ropes are filled, continuously filling the mixed quick cement until the gap between the anchor ear and the main water supply pipeline is filled.
Preferably, in step S4), the one end of the gate valve has a gate valve connecting flange, the other end of the gate valve has a gate valve mounting flange, the gate valve connecting flange is used for being installed in a butt joint manner with the connecting flange in the connection kit, and the gate valve mounting flange is used for connecting the pipe to be connected.
Preferably, the gate valve is further provided with a hand wheel type switch, and a valve core of the gate valve can be opened and closed by rotating the hand wheel type switch.
Preferably, in step S4), the butt-fitting of one end of the gate valve to the connecting flange includes: and installing the gate valve connecting flange of the gate valve and the connecting flange in parallel and fastening by using bolts.
Preferably, in step S6), the splicing and installing the pipe to be connected and the other end of the gate valve includes: and splicing and installing the to-be-connected pipeline and the gate valve installation flange at the other end of the gate valve.
According to the construction method for cutting under pressure water supply pipelines made of different materials, the cutting collision position of the water supply main pipeline is exposed by excavating the cutting working well, and an operator can conveniently go into the well to operate; the connecting pipe is butted with the main water supply pipe through the connecting sleeve, so that the problem of connection among pipes made of different materials is solved, and the construction period is effectively shortened; the gap between the hoop and the main water supply pipeline is filled to play a role in sealing, water pressure operation can be carried out without stopping water pressure during the process of cutting the main water supply pipeline, and adverse effects on nearby residents are reduced to the greatest extent; one end of a gate valve is in butt joint with the connecting flange, and a rhinestone is arranged at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline; the construction is flexible, the operation is convenient, and the application range is wide; opening the gate valve, starting the rhinestones to open holes in the main water supply pipeline, withdrawing the rhinestones after the holes are opened, and closing the gate valve; and splicing and installing the to-be-connected pipeline and the other end of the gate valve to finish the cutting construction of the main water supply pipeline.
Additional features and advantages of embodiments of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the embodiments of the invention without limiting the embodiments of the invention. In the drawings:
FIG. 1 is a flow chart of steps of a construction method for cutting under pressure water supply pipelines made of different materials according to an embodiment of the invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration and explanation only, not limitation.
The technical solution in the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
In the construction process of the subway, the subway needs to pass through a residential gathering area frequently, the construction area is close to residential and commercial building, the surrounding environment is complex, underground pipelines are distributed, and considerable difficulty is increased for the migration and reconstruction construction of the subway early-stage pipelines; wherein because old water supply main pipeline is plain concrete pipe usually, if take traditional drilling, pipe laying, concrete encapsulation construction then need to stop water for many days, will influence nearly every family daily drinking water in this process, and at the cutover in-process, the gesture control degree of difficulty is big, very easily causes water supply main pipeline seepage water, the scheduling problem that breaks.
As shown in FIG. 1, the invention provides a construction method for cutting under pressure water supply pipelines made of different materials, which comprises the following steps: s1) selecting a cutting and butting position of the main water supply pipeline according to a pipeline drawing and the surrounding environment, excavating the covering soil at the cutting and butting position of the main water supply pipeline until the main water supply pipeline is exposed, and continuously excavating downwards from the pipe bottom of the main water supply pipeline to form a cutting and butting working well with a designed depth; s2) sleeving a hoop in a connecting sleeve at the position of the cutting and collision port of the main water supply pipeline, and installing a connecting flange in the connecting sleeve towards the direction of a pipeline to be connected; s3) filling the gap between the hoop and the main water supply pipeline; s4) butting one end of a gate valve with the connecting flange, and installing a rhinestone at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline; s5) opening the gate valve, starting the rhinestones to open holes in the main water supply pipeline, withdrawing the rhinestones after the holes are opened, and closing the gate valve; s6) splicing and installing the pipe to be connected and the other end of the gate valve.
According to the technical scheme of the invention, the construction method for cutting under pressure of the water supply pipelines made of different materials comprises the steps of S1) selecting a cutting and butting position of the main water supply pipeline according to a pipeline drawing and the surrounding environment, excavating the covering soil at the cutting and butting position of the main water supply pipeline until the main water supply pipeline is exposed, and continuously excavating downwards from the bottom of the main water supply pipeline to form a cutting working well with a designed depth; the cutting and jointing working well is excavated to expose the cutting and jointing collision port of the main water supply pipeline, and operators can conveniently go into the well to operate.
The length and the width of the cutting working well are larger than the diameter and the width of the main water supply pipeline, wherein the cutting working well needs to be dug for 1m towards the two radial sides of the main water supply pipeline in the width direction, and the cutting working well needs to continue to be dug for 1m downwards from the pipe bottom of the main water supply pipeline in the depth direction so as to form the cutting working well with enough operating space.
The distance between the piled soil formed by excavating the cutting and connecting working well and the edge of the cutting and connecting working well is not less than 1m, and the height of the piled earthwork is not more than 1.5 m.
According to an embodiment of the present invention, in step S1), excavating the casing soil at the position of the main water supply pipe cutting collision port until exposing the main water supply pipe, and further excavating downwards from the pipe bottom of the main water supply pipe to form a cutting working well with a designed depth, includes: when the design depth of the cutting and jointing working well is less than or equal to a first depth, excavating in a slope releasing mode; and when the design depth of the cutting-connecting working well is greater than the first depth, excavating in a supporting mode.
Preferably, when the depth of the cutting-connecting working well is less than 3m, excavating in a slope releasing mode, wherein the slope ratio of an excavation side slope is not less than 1: 1; and when the depth of the cutting-over working well is more than 3m, excavating in a supporting mode to ensure the safety of the construction process.
According to an embodiment of the present invention, preferably, the step S1) further includes: excavating the covering soil at the position of the cutting and contacting port of the main water supply pipeline in a manual excavation mode so as to expose the main water supply pipeline; and after the main water supply pipeline is exposed, cleaning and washing sludge on the surface of the main water supply pipeline. In order to ensure that the main water supply pipeline is not damaged, the main water supply pipeline is excavated by adopting a manual excavation mode, and after the main water supply pipeline is exposed, mud on the surface of the main water supply pipeline is cleaned and washed clean, so that preparation is made for subsequent pipe connection work.
According to the technical scheme of the invention, step S2) is to sleeve the hoop in the connecting sleeve at the position of the cutting and collision port of the main water supply pipeline and install the connecting flange in the connecting sleeve towards the direction of the pipeline to be connected; through connect the external member with connecting tube with the main pipeline that supplies water docks, has solved the connection problem between different material pipelines, the effectual construction period that has shortened.
According to an embodiment of the invention, in the step S2), the connection kit is prepared according to the diameters of the main water supply pipeline and the pipeline to be connected; the diameter of the hoop in the connecting kit is larger than that of the position of the cutting and jointing collision port of the main water supply pipeline; the diameter of the connecting flange in the connecting kit is equal to the diameter of the pipeline to be connected.
Preferably, the diameter of the hoop is 10cm larger than that of the position of a cutting collision port of the main water supply pipeline, and a gap between the hoop and the main water supply pipeline is used for sealing and filling.
According to an embodiment of the present invention, preferably, the anchor ear is made of steel plates by splicing and welding; and installing the connecting flange on the opening of the side wall of the welded steel plate hoop to form the connecting suite. In the process of welding the anchor ear, welding missing and over welding are avoided, the height of a welding leg is not less than 0.3d (d is the thickness of a steel plate), welding slag on the surface is cleaned after welding is finished, and a preservative is coated to ensure the welding quality.
According to the technical scheme of the invention, the step S3) is used for filling the gap between the hoop and the main water supply pipe to play a role in sealing, so that the water can be continuously pressed during the process of cutting the main water supply pipe, and the adverse effect on nearby residents is reduced to the greatest extent.
According to an embodiment of the present invention, the step S3) of filling the gap between the anchor ear and the main water supply pipe includes: filling hemp ropes into gaps between the hoops and the main water supply pipeline; and after the hemp ropes are filled, continuously filling the mixed quick cement until the gap between the anchor ear and the main water supply pipeline is filled. Because the hemp rope can expand when soaking water, can play the sealed effect of stagnant water after meeting water, effectively prevent pipeline kneck later stage seepage problem through packing hemp rope, asbestos concrete mixture etc. simple process, the measure is reliable.
Filling hemp ropes into the gap between the hoop and the main water supply pipeline, wherein the filling process comprises the following steps: twisting three strands of hemp ropes with the thickness of 1.5cm into one strand, filling a gap between the hoop and the concrete water supply pipeline with an iron flat-head wedge block, filling at least two strands of hemp ropes, and knocking the hemp ropes to a position 50cm away from the edge of the hoop so as to fix the hoop to prevent the movement of the hoop.
And after filling the hemp rope, adding a small amount of water into the mixed asbestos-doped quick cement to further fill the gap between the anchor ear and the main water supply pipeline, ensuring compactness during filling, ensuring that the pipeline does not leak after the hole is opened, and performing next construction after waiting for 24 hours after filling.
According to the technical scheme, in the step S4), one end of a gate valve is in butt joint with the connecting flange, and a rhinestone is arranged at the other end of the gate valve, so that the rhinestone passes through a closed cavity formed between the gate valve and the main water supply pipeline; flexible construction, convenient operation and wide application range.
Before the gate valve is installed, whether the inner surface and the outer surface of the gate valve have defects such as sand holes and cracks or not needs to be checked; whether a valve core of the gate valve is matched with a valve seat or not is checked, and a sealing surface has no defect; checking whether the linkage between the valve rod and the valve core of the gate valve is flexible and reliable; checking whether the valve rod is bent or not in the transportation process; the thread is not damaged or corroded in the preservation process; whether the filler and the gasket are aged and damaged, whether the valve is opened flexibly and the like; and cleaning a connecting pipeline of the gate valve after the detection is correct, and blowing away iron oxide chips, mud sand, welding slag and other impurities by using compressed air to avoid scratching the sealing surface of the gate valve.
According to an embodiment of the present invention, preferably, in the step S4), the one end of the gate valve has a gate valve connecting flange, the other end of the gate valve has a gate valve mounting flange, the gate valve connecting flange is configured to be installed in a butt joint manner with the connecting flange in the connection kit, the gate valve mounting flange is configured to be connected to the pipe to be connected, and the flange structure is flexible to install and detach and convenient to operate.
According to an embodiment of the invention, preferably, the gate valve is further provided with a hand wheel type switch, and a valve core of the gate valve can be opened and closed by rotating the hand wheel type switch, so that a constructor can open and close the gate valve conveniently, and the operation is simple and convenient.
According to an embodiment of the present invention, preferably, the step S4) of butt-mounting one end of the gate valve to the connecting flange includes: and installing the gate valve connecting flange of the gate valve and the connecting flange in parallel and fastening by using bolts. The gate valve is prevented from generating excessive pressure, and prestress is prevented from being left to influence subsequent construction.
According to the technical scheme, in the step S5), the gate valve is opened, the water drill is started to open a hole in the main water supply pipeline, the water drill is withdrawn after the hole is opened, and the gate valve is closed.
Preferably, the water drill is a hydraulic water drill with the opening diameter of 400 mm.
According to the technical scheme of the invention, step S6) is carried out to splice and install the pipeline to be connected and the other end of the gate valve, so as to finish the cutting construction of the main water supply pipeline.
Preferably, the pipeline to be connected is a nodular cast iron pipe, and the nodular cast iron pipe is spliced with the other end of the gate valve; when splicing is carried out, the splicing surface of the gate valve needs to be perpendicular to the central line of the nodular cast iron pipe. The allowable skewness is 1mm when the diameter DN of the nodular cast iron pipe is less than 300mm, and is 2mm when the diameter DN of the nodular cast iron pipe is more than 300 mm.
According to an embodiment of the present invention, preferably, the splicing and installing the pipe to be connected and the other end of the gate valve in step S6) includes: will the want connecting tube with the gate valve the other end gate valve mounting flange carries out the concatenation installation, and is nimble convenient through the flange mounting, and the centering of being convenient for can effectually prevent to reveal.
According to an embodiment of the present invention, after the step S6), the pipe to be connected is cleaned and checked, the gate valve is opened, and the main water supply pipe supplies water to the pipe to be connected.
The washing flow rate of the pipeline to be connected is not less than 1.0m/s, after the first washing is finished by using the clean water, the clean water with the effective chloride ion content not less than 20mg/L is used for soaking for 24 hours, and then the clean water is used for carrying out the second washing; because the washing speed of the pipeline to be connected is high, the head loss is large, and the washing length of each time is not suitable to exceed 1500 m; after washing, the turbidity of the washing water is detected by using a portable turbidity meter, and the washing water is qualified when the turbidity is less than 1 NTU. After the portable turbidity meter is used for detecting the qualified water samples, not less than 10ml of water samples at each discharge point are extracted and sent to a qualified water quality detection center for assay, after the pipeline is detected to be qualified, the gate valve is opened, and the main water supply pipeline supplies water for the to-be-connected pipeline.
The invention aims to provide a construction method for cutting under pressure water supply pipelines made of different materials, which is characterized in that a cutting collision opening position of a water supply main pipeline is exposed by excavating a cutting working well, and an operator can conveniently go into a well to operate; the connecting pipe is butted with the main water supply pipe through the connecting sleeve, so that the problem of connection among pipes made of different materials is solved, and the construction period is effectively shortened; the gap between the hoop and the main water supply pipeline is filled to play a role in sealing, water pressure operation can be carried out without stopping water pressure during the process of cutting the main water supply pipeline, and adverse effects on nearby residents are reduced to the greatest extent; one end of a gate valve is in butt joint with the connecting flange, and a rhinestone is arranged at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline; the construction is flexible, the operation is convenient, and the application range is wide; opening the gate valve, starting the rhinestones to open holes in the main water supply pipeline, withdrawing the rhinestones after the holes are opened, and closing the gate valve; and splicing and installing the to-be-connected pipeline and the other end of the gate valve to finish the cutting construction of the main water supply pipeline.
Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, the embodiments of the present invention are not limited to the details of the above embodiments, and various simple modifications can be made to the technical solutions of the embodiments of the present invention within the technical idea of the embodiments of the present invention, and the simple modifications all belong to the protection scope of the embodiments of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the embodiments of the present invention do not describe every possible combination.
In addition, any combination of various different implementation manners of the embodiments of the present invention is also possible, and the embodiments of the present invention should be considered as disclosed in the embodiments of the present invention as long as the combination does not depart from the spirit of the embodiments of the present invention.
Claims (10)
1. A construction method for cutting and connecting water supply pipelines made of different materials under pressure is characterized by comprising the following steps:
s1) selecting a cutting and butting position of the main water supply pipeline according to a pipeline drawing and the surrounding environment, excavating the covering soil at the cutting and butting position of the main water supply pipeline until the main water supply pipeline is exposed, and continuously excavating downwards from the pipe bottom of the main water supply pipeline to form a cutting and butting working well with a designed depth;
s2) sleeving a hoop in a connecting sleeve at the position of the cutting and collision port of the main water supply pipeline, and installing a connecting flange in the connecting sleeve towards the direction of a pipeline to be connected;
s3) filling the gap between the hoop and the main water supply pipeline;
s4) butting one end of a gate valve with the connecting flange, and installing a rhinestone at the other end of the gate valve, so that the rhinestone forms a closed cavity between the gate valve and the main water supply pipeline;
s5) opening the gate valve, starting the rhinestones to open holes in the main water supply pipeline, withdrawing the rhinestones after the holes are opened, and closing the gate valve;
s6) splicing and installing the pipe to be connected and the other end of the gate valve.
2. The construction method according to claim 1, wherein in the step S1), excavating the covering soil at the position of the main water supply pipe cutting collision mouth until the main water supply pipe is exposed, and further excavating downwards from the pipe bottom of the main water supply pipe to form a cutting working well with a designed depth comprises:
when the design depth of the cutting and jointing working well is less than or equal to a first depth, excavating in a slope releasing mode;
and when the design depth of the cutting-connecting working well is greater than the first depth, excavating in a supporting mode.
3. The construction method according to claim 2, wherein the step S1) further includes: excavating the covering soil at the position of the cutting and contacting port of the main water supply pipeline in a manual excavation mode so as to expose the main water supply pipeline;
and after the main water supply pipeline is exposed, cleaning and washing sludge on the surface of the main water supply pipeline.
4. The construction method according to claim 1, wherein in the step S2), the connection kit is prepared according to the diameters of the main water supply pipeline and the pipeline to be connected; the diameter of the hoop in the connecting kit is larger than that of the position of the cutting and jointing collision port of the main water supply pipeline; the diameter of the connecting flange in the connecting kit is equal to the diameter of the pipeline to be connected.
5. The construction method according to claim 4, wherein the anchor ear is made of steel plates by splicing and welding;
and installing the connecting flange on the opening of the side wall of the welded steel plate hoop to form the connecting suite.
6. The construction method according to claim 1, wherein the step S3) of filling the gap between the anchor ear and the main water supply pipeline comprises:
filling hemp ropes into gaps between the hoops and the main water supply pipeline;
and after the hemp ropes are filled, continuously filling the mixed quick cement until the gap between the anchor ear and the main water supply pipeline is filled.
7. The construction method according to claim 1, wherein in the step S4), the one end of the gate valve has a gate valve connecting flange, the other end of the gate valve has a gate valve mounting flange, the gate valve connecting flange is used for butt-jointing with the connecting flange in the connecting kit, and the gate valve mounting flange is used for connecting the pipes to be connected.
8. The construction method according to claim 7, wherein the gate valve is further provided with a hand wheel type switch, and a spool of the gate valve can be opened and closed by rotating the hand wheel type switch.
9. The construction method according to claim 7, wherein the step S4) of butt-jointing one end of the gate valve with the connecting flange comprises:
and installing the gate valve connecting flange of the gate valve and the connecting flange in parallel and fastening by using bolts.
10. The construction method according to claim 7, wherein the splicing installation of the pipe to be connected and the other end of the gate valve in step S6) comprises:
and splicing and installing the to-be-connected pipeline and the gate valve installation flange at the other end of the gate valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010274967.4A CN111578026A (en) | 2020-04-09 | 2020-04-09 | Under-pressure cutting construction method for water supply pipelines made of different materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010274967.4A CN111578026A (en) | 2020-04-09 | 2020-04-09 | Under-pressure cutting construction method for water supply pipelines made of different materials |
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| CN111578026A true CN111578026A (en) | 2020-08-25 |
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| CN206816219U (en) * | 2017-06-26 | 2017-12-29 | 中铁十二局集团第二工程有限公司 | Port seal |
| US20180372256A1 (en) * | 2017-06-27 | 2018-12-27 | Craig V. Winborn | Pipeline insertion apparatus and method |
| CN209294436U (en) * | 2018-11-27 | 2019-08-23 | 美钻深海能源科技研发（上海）有限公司 | A Simple Manual Gate Valve |
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2020
- 2020-04-09 CN CN202010274967.4A patent/CN111578026A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205013938U (en) * | 2015-09-21 | 2016-02-03 | 陕西建工第二建设集团有限公司 | City tap water pipeline water connection pipe construction structures that does not stop |
| CN206816219U (en) * | 2017-06-26 | 2017-12-29 | 中铁十二局集团第二工程有限公司 | Port seal |
| US20180372256A1 (en) * | 2017-06-27 | 2018-12-27 | Craig V. Winborn | Pipeline insertion apparatus and method |
| CN209294436U (en) * | 2018-11-27 | 2019-08-23 | 美钻深海能源科技研发（上海）有限公司 | A Simple Manual Gate Valve |
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Application publication date: 20200825 |
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