CN111174033A - Swing arm type crane test device and using method thereof - Google Patents
Swing arm type crane test device and using method thereof Download PDFInfo
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- CN111174033A CN111174033A CN202010106771.4A CN202010106771A CN111174033A CN 111174033 A CN111174033 A CN 111174033A CN 202010106771 A CN202010106771 A CN 202010106771A CN 111174033 A CN111174033 A CN 111174033A
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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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M5/00—Engine beds, i.e. means for supporting engines or machines on foundations
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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
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M7/00—Details of attaching or adjusting engine beds, frames, or supporting-legs on foundation or base; Attaching non-moving engine parts, e.g. cylinder blocks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M5/00—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings
- G01M5/0041—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress
- G01M5/005—Investigating the elasticity of structures, e.g. deflection of bridges or air-craft wings by determining deflection or stress by means of external apparatus, e.g. test benches or portable test systems
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- Aviation & Aerospace Engineering (AREA)
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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Jib Cranes (AREA)
Abstract
The invention discloses a swing arm type crane test device and a using method thereof, wherein the swing arm type crane test device comprises a pre-buried foundation, a base, an angle adjusting oil cylinder and a mounting seat; the embedded foundation is connected to the bottom of the base and arranged below the ground; the mounting seats are distributed on the top of the base, first mounting round holes are formed in the mounting seats, and the bottom of the rear end of each mounting seat is hinged to the base; the two angle adjusting oil cylinders are symmetrically distributed on two sides of the front end of the mounting seat, the lower ends of the angle adjusting oil cylinders are hinged to the base, and the upper ends of the angle adjusting oil cylinders are hinged to the mounting seat; the invention can simulate the non-perpendicularity of the jib crane and the tank top, and can realize the deflection detection of the jib crane by matching with a deflection measurer so as to test the structural strength of the upright post of the jib crane, mount seats with different specifications can be mounted, and various function test places are provided for the jib cranes with different hoisting capabilities, so that the invention has good interchangeability and specificity.
Description
Technical Field
The invention relates to a crane test device and a using method thereof, in particular to a swing-arm crane test device for an LNG storage tank top and a using method thereof.
Background
In recent years, liquefied natural gas (LNG for short) is used as a high-quality clean fuel, has the characteristics of high heat value, cleanness, environmental protection, high safety performance and the like, and has wide application and development prospects in the field of energy. In the LNG industry chain, LNG storage is a key technology for its development and utilization, and LNG receiving stations are planned to be constructed in countries around the world, including china, in the coming years. Although the liquefied natural gas industry in China starts late, every link of the whole industrial chain of LNG is developed in the last decade, and the method is particularly applied to the aspect of independent development of major LNG equipment.
The storage tank is used as an LNG receiving terminal, and the top of the storage tank needs a matched crane to complete the hoisting and other work of LNG pump installation, inspection and maintenance. When the operation maintenance of the pump in the tank is carried out, the crane can move the pump and the pump well top plate out. For a storage tank top crane, there are often severe requirements on its structure and use. On one hand, the LNG pump is high in manufacturing cost, and needs to meet the installation requirement of micro-speed accurate positioning during installation, and the crane can collide with a pump well and even damage a low-pressure pump body if the crane is operated improperly; on the other hand, the flammable and explosive medium characteristics of LNG determine the high explosion-proof characteristics of the tank-top crane. Due to the special use condition of the crane, the crane is required to have the characteristics of high explosion-proof level, accurate action positioning, large high-speed and low-speed ratio of the motor and the like.
In order to ensure that the comprehensive inspection and the type test can be carried out in a factory after the manufacture of the swing-arm crane is finished, ensure that the product performance meets the design requirement of the LNG storage tank top crane, meet the requirement of special equipment inspection carried out by the national inspection department, and obtain the special equipment inspection certificate, the device for carrying out the test detection after the manufacture of the swing-arm crane is required to be developed so as to ensure that the swing-arm crane has good performance, safety, reliability and normal operation before leaving a factory.
On one hand, in industrial application, the crane has hoisting types with different tonnages, so that the stress condition, strength, stability and other parameters of the crane under different hoisting capacity conditions need to be checked before formal installation to ensure the operation reliability. On the other hand, when the cantilever crane is actually installed on site, the crane upright post can generate bending deformation at a certain angle after being stressed, and the cantilever crane can also generate a certain non-perpendicularity when being installed on the top of the storage tank. Therefore, the deflection of the upright posts is the guarantee that the lifting and traveling mechanism of the crane runs on the track. Therefore, it is necessary to test the column deflection of the jib crane and study and check the mechanical calculation of the installation offset of the column to the base. Secondly, when the swing-arm crane is used, the relative motion parts of the crane structural parts can not generate sparks, so that the explosion-proof performance of the swing-arm crane needs to be checked, and the requirement of the use environment of the top of the storage tank is met.
Disclosure of Invention
In view of the above problems, the present invention provides a jib crane testing apparatus with both versatility and specificity and a method of using the same, which can satisfy crane tests with different overturning moments by combining mounting seats with different specifications, and can measure mechanical parameters such as deflection of jib crane columns with different hoisting tonnages to check whether the structural strength of the column meets design requirements.
In order to achieve the purpose, the invention adopts the following technical scheme that the swing arm type crane test device comprises a pre-buried foundation, a base, an angle adjusting oil cylinder and a mounting seat;
the embedded foundation is connected to the bottom of the base and arranged below the ground; the mounting seats are distributed on the top of the base, first mounting round holes matched with the stand columns of the swing-arm crane are formed in the mounting seats, and the bottom of the rear ends of the mounting seats are hinged to the base; the two angle adjusting oil cylinders are symmetrically distributed on two sides of the front end of the mounting seat, the lower ends of the angle adjusting oil cylinders are hinged to the base, and the upper ends of the angle adjusting oil cylinders are hinged to the mounting seat.
Further, the embedded foundation comprises an upper flange, a lower flange and foundation bolts; the upper flange and the lower flange are arranged in parallel at intervals, a plurality of foundation bolts are arranged between the upper flange and the lower flange at intervals along the circumferential direction, two ends of each foundation bolt are respectively and tightly connected to the upper flange and the lower flange, and concrete is poured in a space surrounded by the upper flange, the lower flange and the foundation bolts to form an installation foundation of the swing arm crane test device.
Furthermore, the base is of a box girder structure formed by welding steel plates, a second mounting round hole is formed in the center of the box girder structure, the second mounting round hole and the first mounting round hole are concentrically arranged, and a plurality of bolt holes are uniformly distributed in the bottom of the box girder structure and along the circumferential direction of the second mounting round hole; the base passes through rag bolt to be fixed at the top of pre-buried basis, the both sides of the front end of base and rear end all set up two first round pin axle flanges.
Furthermore, the mounting seat is of a box girder structure formed by welding steel plates; a first mounting round hole is formed in the center of the box girder structure, and a plurality of bolt holes are uniformly distributed in the top of the box girder structure along the circumferential direction of the first mounting round hole; and second pin shaft flanges matched with the first pin shaft flanges are respectively arranged on two sides of the bottom of the rear end of the mounting seat, and third pin shaft flanges matched with the angle adjusting oil cylinder are respectively arranged on two sides of the top of the front end of the mounting seat.
The hydraulic pump station comprises a motor, a hydraulic pump, a hydraulic oil tank, a valve group, a pipeline and a support, wherein the motor is fixedly arranged in the support, and a transmission shaft of the hydraulic pump is in transmission connection with the output end of the motor; the hydraulic oil tank is fixedly arranged at the top of the support, the oil inlet end of the hydraulic pump is connected with the oil outlet end of the hydraulic oil tank through a pipeline, the oil outlet end of the hydraulic pump is connected with the oil inlet of the angle adjusting oil cylinder through a pipeline, the oil outlet of the angle adjusting oil cylinder is connected with the oil return port of the hydraulic oil tank through a pipeline, and a valve group is arranged on the pipeline;
the power pump station also comprises an electrical control system, and the electrical control system is connected with the motor.
The vibration measurer comprises a vibration measuring sensor, a signal transmission line and a data collecting and processing unit, wherein the vibration measuring sensor is installed on the base and is connected with the data collecting and processing unit through the signal transmission line; the data collection processing unit is a computer.
Further, the device also comprises a deflection measurer, wherein the deflection measurer comprises a stress induction unit, a portable transmission unit and a data processing and displaying unit; the stress induction units are arranged on the upright post of the swing-arm crane at intervals along the height direction of the upright post, the stress induction units are arranged on the swing arm of the swing-arm crane at intervals along the length direction of the swing arm, and the stress induction units are connected with the data processing and displaying unit through the portable transmission unit.
Furthermore, the stress sensing unit adopts a resistance strain gauge; the portable transmission unit adopts a signal transmission line; the data processing and displaying unit adopts a computer.
The invention also provides a use method of the swing arm type crane test device, which comprises the following steps:
1) forming a pre-buried foundation below the ground;
2) the base is fixed on the top of the embedded foundation, the mounting seat is correspondingly mounted on the base, the upright post of the swing-arm crane is fixed in the first mounting round hole in the mounting seat, and the upright post is fixedly connected with the top of the mounting seat through a bolt so that the swing-arm crane is mounted on the testing device;
3) a deflection measurer is arranged on the swing arm type crane, and a power pump station is connected with an angle adjusting oil cylinder;
4) carrying out deflection measurement on the stand column so as to check whether the stand column meets the structural requirement;
the power pump station provides auxiliary power for the angle adjusting oil cylinder, the angle adjusting oil cylinder makes telescopic motion, so that the mounting seat is subjected to inclination angle change of 0-1 degrees, the upright post is subjected to inclination angle change of 0-1 degrees along with the mounting seat, the deflection measurer measures stress data of the highest position of the upright post of the swing arm crane when the inclination angle is 0-1 degrees, deflection measured values of the upright post are obtained and are compared with stress cloud charts of finite element models at the same position of the upright post, and whether the deflection measured values of the upright post are within an allowable error range of an analysis value in the finite element models or not is judged by comparing whether the deflection measured values of the upright post are within the allowable error range of the analysis value.
Further, in the step 4), the measuring process of the deflection of the upright column includes: when the inclination angle of the mounting seat is 0 degree, the stand column is subjected to bending deformation due to stress due to the length of the stand column and the gravity condition, the stress change data of the highest position of the stand column is measured in real time through the stress sensing units arranged on the surfaces of the stand column and the spiral arm, the data are transmitted to the data processing and displaying unit through the portable transmitting unit, and the data processing and displaying unit processes the data; obtaining the deflection value of the upright post of the swing-arm crane with no load at the inclination angle of 0 degree; when the tank top jib crane runs from one end of a jib crane upright post to the tail end of a jib at a low speed during full-load hoisting, the moment of the whole upright post changes, the stress change of the upright post is measured by a stress sensing unit on the upright post and is transmitted to a data processing and displaying unit by a portable transmitting unit, and the data processing and displaying unit processes the data to obtain the deflection value of the upright post when the full-load jib crane runs from one end of the jib crane upright post to the tail end of the jib at an inclination angle of 0 degrees;
the deflection value of the rotating arm type crane upright post under the inclination angle of 0 degree is compared with the stress cloud picture of the finite element model under the corresponding working condition, and the structural strength of the rotating arm type crane upright post is checked by comparing whether the deflection measured value of the upright post is within the allowable error range of the analysis value in the finite element model;
when the inclination angle of the mounting base is 1 degree, the non-perpendicularity of the swing-arm crane and the tank top of the storage tank during field installation is simulated, the stress sensing unit collects stress change data of the highest position of the upright column and transmits the stress change data to the data processing and displaying unit through the portable transmission unit, the data processing and displaying unit processes the data to obtain the deflection of the upright column of the swing-arm crane under the inclination angle of 1 degree, the deflection of the upright column of the swing-arm crane under the corresponding working condition is compared with a stress cloud chart of a finite element model under the corresponding working condition, and the structural strength of the upright column of the swing-arm crane is tested by comparing whether the measured value of.
By adopting the technical scheme, the invention has the following advantages: 1. the testing device comprises an embedded foundation, a base, a mounting seat and an angle adjusting oil cylinder, wherein a first mounting round hole matched with an upright post of the swing-arm crane is formed in the top of the mounting seat, the bottom of the rear end of the mounting seat is hinged to the base, the front end of the mounting seat is hinged to the base through the angle adjusting oil cylinder, the inclination angle of the mounting seat is adjusted through the angle adjusting oil cylinder, the non-perpendicularity of the swing-arm crane and the top of a storage tank is simulated, and the deflection detection of the swing-arm crane can be realized by matching with a deflection measurer so as to test the structural strength of the upright post of the swing-arm crane. 2. The invention also comprises a vibration measuring device which can monitor and record vibration data under various working conditions in real time, such as vibration data transmitted downwards by the swing-arm crane under different loads, different lifting speeds, walking speeds and rotating speeds, and provides basic data for strengthening the installation foundation of the LNG storage tank.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic view of the construction of the base of the present invention;
FIG. 4 is a schematic top view of the base of the present invention;
FIG. 5 is a schematic structural view of the mount of the present invention;
FIG. 6 is a schematic top view of the mount of the present invention;
FIG. 7 is a schematic view of the power pump station of the present invention;
FIG. 8 is a side view schematic of the structure of FIG. 7;
FIG. 9 is a schematic top view of the structure of FIG. 7;
FIG. 10 is a layout diagram of stress induction units when column deflection measurement is performed;
in the figure, 1, a foundation is embedded; 1. an upper flange; 12. a lower flange; 13. anchor bolts; 14. secondary grouting material; 2. a base; 21. a second mounting circular hole; 22. a first pin flange; 3. an angle adjusting oil cylinder; 4. a mounting seat; 41. a first mounting circular hole; 42. bolt holes; 43. a second pin flange; 44. a third pin flange; 5. a power pump station; 51. a motor; 52. a hydraulic pump; 53. a hydraulic oil tank; 54. a support; 55. an electrical control system; 6. a stress sensing unit; 7. a portable transfer unit; 8. and a data processing and displaying unit.
Detailed Description
The invention is described in detail below with reference to the figures and examples. It is to be understood, however, that the drawings are provided solely for the purposes of promoting an understanding of the invention and that they are not to be construed as limiting the invention.
As shown in fig. 1, the test device for the swing arm crane provided by the invention comprises an embedded foundation 1, a base 2, an angle adjusting oil cylinder 3 and a mounting base 4;
wherein, the embedded foundation 1 is connected with the bottom of the base 2 and arranged below the ground; the mounting seats 4 are distributed on the top of the base 2, first mounting round holes 41 matched with the stand columns of the swing-arm crane are formed in the top of the mounting seats 4, and the bottom of the rear ends of the mounting seats 4 are hinged to the base 2; two angle adjusting oil cylinders 3 are symmetrically distributed on two sides of the front end of the mounting seat 4, the lower ends of the angle adjusting oil cylinders 3 are hinged on the base 2, and the upper ends of the angle adjusting oil cylinders 3 are hinged on the mounting seat 4.
In a preferred embodiment, the embedded foundation 1 comprises an upper flange 11, a lower flange 12 and anchor bolts 13; the upper flange 11 and the lower flange 12 are arranged in parallel at intervals, a plurality of anchor bolts 13 are arranged between the upper flange 11 and the lower flange 12 at intervals along the circumferential direction, two ends of each anchor bolt 13 are respectively and tightly connected to the upper flange 11 and the lower flange 12, and concrete is poured in a space surrounded by the upper flange 11, the lower flange 12 and the anchor bolts 13 to form an installation foundation of the swing arm crane test device.
In a preferred embodiment, the base 2 is a box girder structure formed by welding high-strength steel plates, a second mounting circular hole 21 is formed in the center of the box girder structure, the second mounting circular hole 21 and the first mounting circular hole 41 are concentrically arranged, and a plurality of bolt holes are uniformly distributed at the bottom of the box girder structure and along the circumferential direction of the second mounting circular hole 21; the base 2 is fixed at the top of the embedded foundation 1 through foundation bolts, and two first pin shaft flanges 22 are arranged on the two sides of the front end and the rear end of the base 2 so as to facilitate connection of the base 2 with the mounting base 4 and the angle adjusting oil cylinder 3.
In a preferred embodiment, the mounting seat 4 is a box girder structure formed by welding high-strength steel plates; a first mounting round hole 41 is formed in the center of the box girder structure, and a plurality of bolt holes 42 are uniformly distributed in the top of the box girder structure along the circumferential direction of the first mounting round hole 41; second pin shaft flanges 43 matched with the first pin shaft flanges 22 are respectively arranged on two sides of the bottom of the rear end of the mounting seat 4, and third pin shaft flanges 44 matched with the angle adjusting oil cylinder 3 are respectively arranged on two sides of the top of the front end of the mounting seat 4. The sizes of the first mounting round hole 41 and the bolt hole 42 on the mounting seat 4 can be designed according to different specifications of the upright columns of the swing-arm cranes with different tonnages. In addition, the size of the butt joint of the installation seat 4 and the base 2 is kept unchanged (namely, the size of the first pin shaft flange 22 on the base 2 and the second pin shaft flange 43 on the installation seat 4 and the butt joint position of the two are unchanged), so that the test device has good interchangeability, the test device of the swing-arm crane can be used for installing different types of swing-arm cranes, and various function test places are provided for the swing-arm cranes with different hoisting capabilities.
In a preferred embodiment, the invention also comprises a power pump station 5, wherein the power pump station 5 comprises a motor 51, a hydraulic pump 52, a hydraulic oil tank 53, a valve bank, a pipeline and a bracket 54, the motor 51 is fixedly arranged in the bracket 54, and a transmission shaft of the hydraulic pump 52 is in transmission connection with the output end of the motor 51; the hydraulic oil tank 53 is fixedly mounted at the top of the support 54, the oil inlet end of the hydraulic pump 52 is connected with the oil outlet end of the hydraulic oil tank 53 through a pipeline, the oil outlet end of the hydraulic pump 52 is connected with the oil inlet of the angle adjusting oil cylinder 3 through a pipeline, the oil outlet of the angle adjusting oil cylinder 3 is connected with the oil return port of the hydraulic oil tank 53 through a pipeline, and a valve group is arranged on the pipeline. When the length of the angle adjusting oil cylinder 3 needs to be changed to carry out the column structure flexibility test, the power pump station is started to provide auxiliary power for the angle adjusting oil cylinder. Otherwise, it does not need to be turned on.
In a preferred embodiment, the present invention further comprises a vibrometer, which comprises a vibrometer sensor, a signal transmission line and a data collection processing unit, wherein the vibrometer sensor is mounted on the base 2, and the vibrometer sensor is connected with the data collection processing unit through the signal transmission line; during the use, vibration measurement sensor gathers the vibration data of jib crane test device down transmission when jib crane has different loads, different lifting speed, walking and slewing speed in real time to transmit to data collection processing unit through signal transmission line, data collection processing unit handles and preserves the vibration data, can provide basic data for the enhancement of LNG storage tank installation basis.
In a preferred embodiment, the invention also comprises a deflection measurer, which comprises a stress sensing unit 6, a portable transmission unit 7 and a data processing and displaying unit 8; a plurality of stress induction units 6 are arranged on the upright post of the jib crane at intervals along the height direction of the upright post, a plurality of stress induction units 6 are arranged on the jib of the jib crane at intervals along the length direction of the jib crane, and the stress induction units 6 are connected with a data processing display unit 8 through a portable transmission unit 7; the stress sensing unit 6 collects surface stress change data of the stand column and the swing arm in real time and transmits the surface stress change data to the data processing and displaying unit 8 through the portable transmission unit 7, and the data processing and displaying unit 8 processes and displays the transmitted data so that testers can know the deflection change of the stand column of the whole swing arm crane in the test process conveniently.
In a preferred embodiment, the stress sensing unit 6 may employ a resistance strain gauge; the portable transmission unit 7 may employ a signal transmission line; the data collection processing unit and the data processing display unit 8 both adopt computers.
In a preferred embodiment, the power pump station 5 further comprises an electrical control system 55, the electrical control system 55 being connected to the motor 51 for controlling the operation of the motor 51.
In a preferred embodiment, a water source, a power source, a gas source, and fire equipment are provided in the vicinity of the jib crane test rig.
In a preferred embodiment, the swing arm crane test rig physical dimensions (length x width x height) are about 2400 x 2100 x 1800 mm.
In a preferred embodiment, the base 2 has overall dimensions (length x width x height) of about 2300 x 2100 x 1050 mm.
In a preferred embodiment, the mounting base 4 has outer dimensions (length x width x height) of about 2300 x 2100 x 1070 mm.
Based on the test device of the swing-arm crane, the invention also provides a use method of the test device of the swing-arm crane, which comprises the following steps:
1) forming a pre-buried foundation 1 below the ground;
a plurality of foundation bolts 13 are arranged between an upper flange 11 and a lower flange 12 at intervals along the circumferential direction, two ends of each foundation bolt 13 are respectively fastened and connected to the upper flange 11 and the lower flange 12, a frame connected with the upper flange 11, the lower flange 12 and the foundation bolts 13 is placed in a pre-dug pit, then concrete is poured, after the concrete is solidified for a certain time, a secondary grouting material 14 is poured between the concrete and the upper flange 11, a gap between the concrete and the upper flange 11 is filled, then the upper flange 11 is leveled, so that the top surface of the whole embedded foundation 1 is kept horizontal, and then the upper flange 11 is detached;
2) the base 2 is fixedly connected with a plurality of foundation bolts 13 on the embedded base 1, the mounting base 4 is correspondingly mounted on the base 2, the upright column of the swing-arm crane is fixed in a first mounting round hole 41 on the mounting base 4, and the upright column is fixedly connected with the top of the mounting base 4 through bolts so that the swing-arm crane is mounted on the test device;
3) a deflection measurer is arranged on the swing arm crane, and a power pump station 5 is connected with an angle adjusting oil cylinder 3;
4) carrying out deflection measurement on the stand column so as to check whether the stand column meets the structural requirement;
the deflection of the upright column is an important parameter for testing the mechanical property of the material, and the safe operation of the lifting travelling mechanism on a designed track is ensured. If the deflection is too large, the inclination angle of the rail surface exceeds a certain range, and the walking trolley can slide, so that potential safety hazards are generated.
The power pump station 5 provides auxiliary power for the angle adjusting oil cylinder 3, the angle adjusting oil cylinder 3 makes telescopic motion, so that the mounting seat 4 is subjected to inclination angle change of 0-1 degrees, the upright post is subjected to inclination angle change of 0-1 degrees along with the mounting seat 4, and the deflection measurer measures stress data of the highest position (namely a maximum deflection point and a most dangerous point) of the upright post of the swing arm crane at the inclination angles of 0-1 degrees to obtain a deflection measured value of the upright post, and compares the deflection measured value with a stress cloud chart of a finite element model at the same position of the upright post. And (4) comparing whether the deflection measured value of the upright column is within the allowable error range of the analysis value in the finite element model or not, so as to check whether the upright column meets the structural requirement or not.
In a preferred embodiment, in step 4), the measuring process of the deflection of the column includes: when the inclination angle of the mounting seat 4 is 0 degrees, namely the rotary arm type crane upright is vertical to the ground. Because the length of the upright column and the gravity condition borne by the upright column cause bending deformation due to stress, the stress change data of the highest part of the upright column is measured in real time by a stress sensing unit 6 (namely a resistance strain gauge) arranged on the surfaces of the upright column and the spiral arm, the data is transmitted to a data processing and displaying unit 8 by a portable transmitting unit 7, and the data is processed by the data processing and displaying unit 8; obtaining the deflection value of the upright post of the swing-arm crane with no load at the inclination angle of 0 degree; when the tank top swing-arm crane runs from one end of the upright post of the swing-arm crane to the tail end of the swing arm at a low speed during full-load hoisting, the moment of the whole upright post changes. Measuring the stress change of the upright column through a stress sensing unit 6 on the upright column, and transmitting data to a data processing display unit 8 through a portable transmission unit 7 to obtain the deflection value of the upright column when the fully loaded jib crane at an inclination angle of 0 degrees travels from one end of the upright column of the jib crane to the tail end of the jib at a low speed;
and comparing the deflection value of the rotating arm type crane upright post under the inclination angle of 0 degree with the stress cloud picture of the finite element model under the corresponding working condition, and checking the structural strength of the rotating arm type crane upright post by comparing whether the deflection measured value of the upright post is within the allowable error range of the analysis value in the finite element model.
When the inclination angle of the mounting base 4 is 1 degree, namely the upright post of the swing-arm crane is also inclined by 1 degree, the non-perpendicularity of the swing-arm crane and the tank top of the storage tank during field installation can be simulated, so that the maximum deflection in the test range of the device is measured, the stress sensing unit 6 collects stress change data of the highest position of the upright post, the data are transmitted to the data processing display unit 8 through the portable transmission unit 7, the data are processed by the data processing display unit 8, the deflection of the upright post of the swing-arm crane at the inclination angle of 1 degree is obtained, the comparison with a stress cloud chart of a finite element model under the corresponding working condition is carried out, and the structural strength of the upright post of the swing-arm crane is tested by comparing whether the measured deflection of the upright post is.
In a preferred embodiment, before step 1), the test device is inspected, specifically including inspecting its appearance, mounting surface, and connections of parts. Firstly, the appearance of each part is required to be checked to have the phenomena of no damage, looseness and the like; secondly, checking whether each mounting surface is clean or not, whether foreign matters such as metal debris exist or not, and if so, cleaning; thirdly, whether the strength grade marks of the bolts and the nuts for the test are intact or not and whether the bolts and the nuts have the phenomena of damage, tooth damage, shearing, stretching deformation and the like are checked. If so, the bolt cannot be used and scrapped, and a new bolt and a new nut are required to be replaced; fourthly, checking whether each connecting bolt is loosened or not, and if so, eliminating the looseness.
In a preferred embodiment, the jib crane test apparatus requires a safety check during use thereof, comprising: firstly, the test device of the swing-arm crane has no abnormal vibration, obvious deformation and the like in the use process; secondly, the swing arm crane test device notices whether the welding seam of the stand structural part has a burst phenomenon or not in the use process, and stops the test immediately if the welding seam has the burst phenomenon; thirdly, it should be noted that there is no looseness between the parts (e.g., the connecting bolts).
In a preferred embodiment, after the test is completed, the jib crane should be serviced, comprising: firstly, after each test is finished, cleaning the test device to remove impurities, scraps, oil stains and the like; secondly, after each test is finished, checking each part, and eliminating the connecting bolt if the connecting bolt is loosened; thirdly, the connecting bolts and nuts for each test are inspected for the presence of damage, tooth breakage, shear tensile deformation and the like, and if so, the connecting bolts and nuts are not used, and replaced with new ones after being discarded. After the test is finished, cleaning the bolt and the nut, smearing lubricating grease and storing the bolts and the nut in a unified way; fourthly, each use should be well recorded, and the use condition and the existing problems are recorded; fifthly, the equipment management department should make a long-term maintenance, maintenance and overhaul plan of the jib crane test device, and regularly maintain, maintain and overhaul the jib crane to ensure that the jib crane has a good use state at any time.
The present invention has been described with reference to the above embodiments, and the structure, arrangement, and connection of the respective members may be changed. On the basis of the technical scheme of the invention, the improvement or equivalent transformation of the individual components according to the principle of the invention is not excluded from the protection scope of the invention.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010106771.4A CN111174033B (en) | 2020-02-20 | 2020-02-20 | Radial arm type crane test device and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010106771.4A CN111174033B (en) | 2020-02-20 | 2020-02-20 | Radial arm type crane test device and use method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN111174033A true CN111174033A (en) | 2020-05-19 |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104214172A (en) * | 2014-09-02 | 2014-12-17 | 润邦卡哥特科工业有限公司 | Test transition flange for marine engineering goose-neck jib crane and application thereof |
| CN104400415A (en) * | 2014-10-31 | 2015-03-11 | 湖南百特随车起重机有限公司 | Crane jib assembling and debugging system |
| WO2015076769A2 (en) * | 2013-11-25 | 2015-05-28 | Kadir Koymen Film Yapimi Sinema Ekipmanlari Uretimi Ithalat Ve Ihracat A.S. | Crane targeting for a dolly |
| CN105334014A (en) * | 2015-11-10 | 2016-02-17 | 长安大学 | Adjustable suspended cable method for testing bridge deflection |
| CN106287117A (en) * | 2016-08-22 | 2017-01-04 | 赵恕轲 | A kind of adjustable type pumping plant machine unit support |
| CN206637189U (en) * | 2017-03-29 | 2017-11-14 | 山东天齐置业集团股份有限公司 | A kind of large-scale tower crane foundation pre-embedded bolt fixing device |
| KR20180111137A (en) * | 2017-03-31 | 2018-10-11 | 주식회사수산중공업 | Crane |
| CN211694033U (en) * | 2020-02-20 | 2020-10-16 | 中海石油气电集团有限责任公司 | Jib Crane Test Device |
-
2020
- 2020-02-20 CN CN202010106771.4A patent/CN111174033B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015076769A2 (en) * | 2013-11-25 | 2015-05-28 | Kadir Koymen Film Yapimi Sinema Ekipmanlari Uretimi Ithalat Ve Ihracat A.S. | Crane targeting for a dolly |
| CN104214172A (en) * | 2014-09-02 | 2014-12-17 | 润邦卡哥特科工业有限公司 | Test transition flange for marine engineering goose-neck jib crane and application thereof |
| CN104400415A (en) * | 2014-10-31 | 2015-03-11 | 湖南百特随车起重机有限公司 | Crane jib assembling and debugging system |
| CN105334014A (en) * | 2015-11-10 | 2016-02-17 | 长安大学 | Adjustable suspended cable method for testing bridge deflection |
| CN106287117A (en) * | 2016-08-22 | 2017-01-04 | 赵恕轲 | A kind of adjustable type pumping plant machine unit support |
| CN206637189U (en) * | 2017-03-29 | 2017-11-14 | 山东天齐置业集团股份有限公司 | A kind of large-scale tower crane foundation pre-embedded bolt fixing device |
| KR20180111137A (en) * | 2017-03-31 | 2018-10-11 | 주식회사수산중공업 | Crane |
| CN211694033U (en) * | 2020-02-20 | 2020-10-16 | 中海石油气电集团有限责任公司 | Jib Crane Test Device |
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