Static load test device and test method

Abstract

The present invention discloses a static load test device, including a test frame, the test frame includes an upper crossbeam and a lower crossbeam arranged in parallel, a plurality of pulley assemblies are installed on the upper crossbeam and the lower crossbeam at intervals, the upper crossbeam and the lower crossbeam are also provided with hangers corresponding to the pulley assemblies, the hangers are connected to the pulley assemblies, the pulleys of the pulley assemblies are connected in sequence by a pull rope, one end of the pull rope is connected to a fixed end, and the other end applies a loading force to perform a static load test on the hanger through the pulley assembly. A static load test method is performed by the above-mentioned static load test device. In the above manner, the static load test device and the experimental method of the present invention can test multiple hangers at the same time, and are suitable for hangers with different rated loads, are simple to operate, and have high test efficiency.

Description

Technical Field

[0001] The invention relates to the field of building experiments, and in particular to a static load test device and an experimental method. Background Art

[0002] Static load tests are mainly used to detect the bearing capacity of large structures such as bridges in highway traffic. They adopt test methods close to the actual working conditions of vertical compression piles to determine the vertical (compression) ultimate bearing capacity of a single pile as a basis for design, or to conduct sampling inspection and evaluation of the bearing capacity of engineering piles.

[0003] The existing static load test method and device can only be used for large structural parts. The test process is slow and it is impossible to perform static load tests on multiple small parts (such as lifting rings and hanging parts) at the same time. Therefore, it is necessary to design a simple and easy-to-operate static load test method and device for lifting rings and hanging parts to meet production needs. Summary of the invention

[0004] The main technical problem solved by the present invention is to provide a static load test device and an experimental method, which can test multiple hanging parts at the same time and is suitable for hanging parts with different rated loads, with simple operation and high test efficiency.

[0005] In order to solve the above technical problems, a technical solution adopted by the present invention is: to provide a static load test device, including a test frame, the test frame includes an upper beam and a lower beam arranged in parallel, and a plurality of pulley assemblies are installed on the upper beam and the lower beam at intervals, and the upper beam and the lower beam are also provided with hanging parts corresponding to the pulley assemblies, the hanging parts are connected to the pulley assemblies, and the pulleys of the pulley assemblies are connected in sequence by a pull rope, one end of the pull rope is connected to a fixed end, and the other end applies a loading force to perform a static load test on the hanging parts through the pulley assembly.

[0006] In a preferred embodiment of the present invention, the inner sides of the upper beam and the lower beam have installation grooves, the pulley assembly is arranged in the installation grooves, one end of the hanger is connected to the upper beam or the lower beam, and the other end is connected to the pulley assembly, and the center of the hanger and the center of the pulley are in the same vertical plane.

[0007] In a preferred embodiment of the present invention, the pulley assembly includes a pulley frame connected to an upper beam or a lower beam, the pulley frame has a pulley cavity, the pulley frame is provided with a pulley shaft, and the pulley is arranged in the pulley cavity and connected to the pulley shaft.

[0008] In a preferred embodiment of the present invention, one end of the pulley shaft extends out of the pulley frame, and a limiting groove is provided on the extended portion, and a clamping plate that fits the pulley frame is installed in the limiting groove.

[0009] In a preferred embodiment of the present invention, two deep groove ball bearings are installed between the inner side of the pulley and the pulley shaft, and retaining rings are symmetrically arranged on the inner side of the pulley, and the retaining rings are in contact with the deep groove ball bearings to limit the movement of the deep groove ball bearings.

[0010] In a preferred embodiment of the present invention, the upper end of the pulley frame has a hanger groove and a positioning hole, the lower end of the hanger is arranged in the hanger groove, and the hanger is connected to the pulley frame by inserting a positioning piece into the positioning hole.

[0011] In a preferred embodiment of the present invention, two connecting holes are symmetrically provided on the pulley frame, and equal-length stud bolts are installed in the connecting holes. Both ends of the equal-length stud bolts are connected to the upper beam or the lower beam and locked with nuts.

[0012] In a preferred embodiment of the present invention, one end of the pull rope is connected to a hanging scale, the lower end of the hanging scale is connected to the lower cross beam, the other end is connected to the tension application end, and both ends of the pull rope are tightened by a rope clamp, and the hanging piece is a hanging ring or a hanging piece.

[0013] In a preferred embodiment of the present invention, the left and right sides of the lower crossbeam and the upper crossbeam are connected by vertical beams, the lower crossbeam is installed on the working platform, and both ends are connected to the working platform by adjusting bolts for adjusting height and level.

[0014] In order to solve the above technical problems, another technical solution adopted by the present invention is: to provide a test method of the above static load test device, comprising the following steps: a. Install multiple lifting rings or hanging parts on the upper beam and the lower beam at intervals, connect pulley assemblies of the same specifications below the lifting rings or hanging parts on the upper beam and above the lifting rings or hanging parts on the lower beam, and ensure that the pulley center and the center of the lifting ring or hanging part are on the same vertical plane; b. Pass the pull rope through the multiple pulley assemblies in sequence, one end of the pull rope is connected to a hanging scale, the lower end of the hanging scale is connected to the lower beam to fix one end, and apply tension to the other end of the pull rope, so that the pull rope is in a tensioned state, and the load rises slowly; c. When the tension reaches the required pressure of the experiment, keep the tension loading for a certain time to complete the loading experiment; d. After the static load test, observe whether there are welding defects at the weld of the workpiece. If there are no welding defects, the static load test is qualified. By measuring and comparing the changes in the key dimensions of the workpiece before and after the static load test, if the size change range meets the allowable range of the specification, the static load test is qualified; e. Replace other lifting rings or hanging parts and repeat the above steps to complete another set of static load tests.

[0015] The beneficial effects of the present invention are as follows: the static load test device and the test method of the present invention can test multiple hanging parts at the same time, are suitable for hanging parts with different rated loads, are easy to operate, and meet production needs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0017] Figure 1 It is a structural schematic diagram of a preferred embodiment of the static load test device of the present invention;

[0018] Figure 2 yes Figure 1 Left sectional view of

[0019] Figure 3 yes Figure 2 Schematic diagram of the local structure;

[0020] Figure 4 is a schematic diagram of the structure of the pulley assembly;

[0021] Figure 5 yes Figure 4 Left view of

[0022] Figure 6 It is a schematic diagram of the structure of the pulley shaft;

[0023] The markings of the components in the accompanying drawings are as follows: 1. test frame, 11. upper crossbeam, 12. lower crossbeam, 13. mounting groove, 14. vertical beam, 2. pulley assembly, 21. pulley frame, 22. pulley, 23. pulley shaft, 24. limit groove, 25. clamping plate, 26. deep groove ball bearing, 27. hanging groove, 28. positioning hole, 29. positioning piece, 30. connecting hole, 31. equal-length stud bolt, 32. nut, 33. pulley cavity, 34. spacer, 35. retaining ring, 3. hanging piece, 4. pull rope, 5. hanging scale, 6. rope clamp, 7. working platform, 8. adjusting bolt. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1A static load test device includes a test frame 1, which includes an upper beam 11 and a lower beam 12 arranged in parallel. A plurality of pulley assemblies 2 are installed on the upper beam 11 and the lower beam 12 at intervals. The upper beam 11 and the lower beam 12 are also provided with hangers 3 corresponding to the pulley assemblies 2. The hangers 3 are connected to the pulley assemblies 2. The pulleys 22 of the pulley assemblies 2 are connected in sequence through a pull rope 4. One end of the pull rope 4 is connected to a fixed end, and the other end applies a loading force to perform a static load test on the hangers 3 through the pulley assemblies 2. The pull rope is a steel wire rope.

[0026] In addition, the upper crossbeam 11 and the lower crossbeam 12 have mounting grooves 13 on their inner sides, the pulley assembly 2 is arranged in the mounting grooves 13, one end of the hanger 3 is connected to the upper crossbeam 11 or the lower crossbeam 12, and the other end is connected to the pulley assembly 2, and the center of the hanger 3 and the center of the pulley 22 are in the same vertical plane.

[0027] In addition, the pulley assembly 2 includes a pulley frame 21 connected to the upper beam 11 or the lower beam 12 , the pulley frame 21 has a pulley cavity 33 , the pulley frame 21 is provided with a pulley shaft 23 , and the pulley 22 is arranged in the pulley cavity 33 and connected to the pulley shaft 23 .

[0028] In addition, one end of the pulley shaft 23 extends out of the pulley frame 21 , and a limiting groove 24 is provided on the extended portion, and a clamping plate 25 that fits with the pulley frame 21 is installed in the limiting groove 24 .

[0029] In addition, two deep groove ball bearings 26 are installed between the inner side of the pulley 22 and the pulley shaft 23, and a spacer 34 is provided between the deep groove ball bearings 26. A retaining ring 35 is also provided on the inner side of the pulley. The retaining ring 35 contacts the deep groove ball bearings 26 to limit the movement of the deep groove ball bearings 26.

[0030] In addition, the upper end of the pulley frame 21 has a hanger groove 27 and a positioning hole 28, the lower end of the hanger 3 is arranged in the hanger groove 27, and the hanger 3 is connected to the pulley frame 21 by inserting a positioning member 29 into the positioning hole 28, and the positioning member 29 is a latch.

[0031] In addition, two connecting holes 30 are symmetrically provided on the pulley frame 21 , and stud bolts 31 of equal length are installed in the connecting holes 30 . Both ends of the stud bolts 31 of equal length are connected to the upper cross beam 11 or the lower cross beam 12 , and are locked with nuts 32 .

[0032] In addition, one end of the pull rope 4 is connected to a hanging scale 5, the lower end of the hanging scale 5 is connected to the lower cross beam 12, and the other end is connected to the tension application end. The two ends of the pull rope 4 are gathered by a rope clamp 6, and the hanging piece 3 is a hanging ring or a hanging piece.

[0033] In addition, the left and right sides of the lower cross beam 11 and the upper cross beam 12 are connected by a vertical beam 13. The lower cross beam 12 is installed on the working platform 7, and both ends are connected to the working platform 7 by adjusting bolts 8 for adjusting height and level.

[0034] A test method of the static load test device mentioned above, taking a lifting ring with a load of 0.5t as an example,

[0035] a. Install 10 lifting rings in total on the upper beam 11 and the lower beam 12 at intervals and in a staggered manner, and connect 10 pulley assemblies 2 of the same specifications below the lifting rings on the upper beam 11 and above the lifting rings on the lower beam 12, ensuring that the center of the pulley 22 and the center of the lifting ring are in the same vertical plane;

[0036] b. Pass the pull rope 4 through 10 pulley assemblies 2 in sequence. One end of the pull rope 4 is connected to a hanging scale 5. The lower end of the hanging scale 5 is connected to the lower crossbeam 11 to fix one end. Pulling force is applied to the other end of the pull rope 4 to make the pull rope 4 in a tensioned state, and the load rises slowly;

[0037] c. When the tension reaches 5KN, keep the tension loading for 10 minutes to complete the loading test;

[0038] d. After the static load test, observe whether there are any welding defects at the weld of the workpiece. If there are no welding defects, the static load test is qualified. By measuring and comparing the changes in the key dimensions of the workpiece before and after the static load test, if the size change range meets the allowable range of the specification, the static load test is qualified, and a static load test report is designed;

[0039] e. The test process for other loads such as 1.5t and 3t is the same as that for 0.5t.

[0040] Different from the prior art, the static load test device and the test method of the present invention can test multiple hanging parts at the same time, and are suitable for hanging parts with different rated loads, and are simple to operate and have high test efficiency.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A static load test device, It is characterized in that The test frame comprises an upper crossbeam and a lower crossbeam which are arranged in parallel, a plurality of pulley assemblies are installed on the upper crossbeam and the lower crossbeam at intervals, a hanging piece corresponding to the pulley assemblies is also arranged on the upper crossbeam and the lower crossbeam, the hanging piece is connected to the pulley assemblies, the pulleys of the pulley assemblies are connected in sequence by a pull rope, one end of the pull rope is connected to a fixed end, and the other end applies a loading force to perform a static load test on the hanging piece through the pulley assembly.

2. The static load test device according to claim 1, It is characterized in that The upper beam and the lower beam have mounting grooves on their inner sides, the pulley assembly is arranged in the mounting grooves, one end of the hanger is connected to the upper beam or the lower beam, and the other end is connected to the pulley assembly, and the center of the hanger and the center of the pulley are in the same vertical plane.

3. The static load test device according to claim 2, It is characterized in that The pulley assembly comprises a pulley frame connected to an upper crossbeam or a lower crossbeam, wherein the pulley frame has a pulley cavity, a pulley shaft is passed through the pulley frame, and the pulley is arranged in the pulley cavity and connected to the pulley shaft.

4. The static load test device according to claim 3, It is characterized in that One end of the pulley shaft extends out of the pulley frame, and a limiting groove is provided on the extended part, and a clamping plate that fits the pulley frame is installed in the limiting groove.

5. The static load test device according to claim 4, It is characterized in that Two deep groove ball bearings are installed between the inner side of the pulley and the pulley shaft, and retaining rings are symmetrically arranged on the inner side of the pulley. The retaining rings are in contact with the deep groove ball bearings to limit the movement of the deep groove ball bearings.

6. The static load test device according to claim 3, It is characterized in that The upper end of the pulley frame is provided with a hanging member groove and a positioning hole, the lower end of the hanging member is arranged in the hanging member groove, and the hanging member is connected to the pulley frame by inserting the positioning member into the positioning hole.

7. The static load test device according to claim 6, It is characterized in that Two connecting holes are symmetrically arranged on the pulley frame, and stud bolts of equal length are installed in the connecting holes. Both ends of the stud bolts of equal length are connected to the upper beam or the lower beam and are locked with nuts.

8. The static load test device according to any one of claims 1 to 7, It is characterized in that One end of the pull rope is connected to a hanging scale, the lower end of the hanging scale is connected to the lower cross beam, the other end is connected to the tension application end, and both ends of the pull rope are tightened by rope clamps, and the hanging piece is a hanging ring or a hanging piece.

9. The static load test device according to claim 8, It is characterized in that The left and right sides of the lower cross beam and the upper cross beam are connected by vertical beams. The lower cross beam is installed on the working platform, and both ends are connected to the working platform by adjusting bolts for adjusting height and level.

10. A test method for the static load test device according to claim 9, It is characterized in that The following steps are involved: a. Install multiple lifting rings or hanging parts on the upper beam and the lower beam at intervals, connect pulley assemblies of the same specifications below the lifting rings or hanging parts on the upper beam and above the lifting rings or hanging parts on the lower beam, and ensure that the center of the pulley and the center of the lifting ring or hanging parts are on the same vertical plane; b. Pass the pull rope through multiple pulley assemblies in sequence. One end of the pull rope is connected to a hanging scale. The lower end of the hanging scale is connected to the lower beam to fix one end. Pulling force is applied to the other end of the pull rope to make the pull rope in a tensioned state, and the load rises slowly; c. When the tension reaches the required pressure of the experiment, keep the tension loading for a certain period of time to complete the loading experiment; d. After the static load test, observe whether there are any welding defects at the weld of the workpiece. If there are no welding defects, the static load test is qualified. By measuring and comparing the changes in the key dimensions of the workpiece before and after the static load test, if the size change range meets the allowable range of the specification, the static load test is qualified; e. Replace other lifting rings or hanging parts and repeat the above steps to complete another set of static load tests.

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