Device and method for testing anti-seismic performance of expansion joint fitting

Abstract

The invention provides an expansion joint fitting anti-seismic performance test device. The expansion joint fitting anti-seismic performance test device comprises a fixed table; the fixed part assembly is fixed with the fixed table, and one end of the fixed part assembly is fixed with one end of a tested expansion joint fitting; the actuating part assembly is fixed with the fixed table, and the driving end of the actuating part assembly is fixed with the other end of the tested expansion joint fitting; the actuating part assembly, the tested expansion joint fitting and the fixed part assembly are collinearly arranged, and the tested expansion joint fitting is fixed with the fixed table; the monitoring unit is connected with the actuating part, and the monitoring unit is used for measuring and collecting stress and displacement data of the tested expansion joint fitting in the loading process; the reciprocating motion generated by the expansion joint fitting under the earthquake action is simulated through the actuating part assembly, the stress and displacement data of the expansion joint fitting in the simulation process of the actuating part assembly are detected through the monitoring unit, and the ultimate bearing capacity of the expansion joint fitting is calculated according to the obtained data. And the anti-seismic property of the expansion joint fitting is improved.

Description

Technical Field

[0001] This invention relates to the field of fitting testing, and specifically to a method for testing the seismic performance of expansion joint fittings. Background Technology

[0002] If electrical equipment fails or is damaged in an earthquake, it will cause incalculable economic losses. Power outages not only seriously affect normal production, life and earthquake relief work, but may also trigger secondary disasters such as fires, seriously threatening people's lives and property.

[0003] The equipment in substations and converter stations is connected by tubular busbars or flexible busbars. For rigid busbar connection circuits, expansion joint hardware plays the role of fixing and supporting the busbar. It can not only ensure that the rigid busbar can slide freely along the axial direction, but also has a good damping energy dissipation effect. In addition, it can reduce the seismic response at the top of the post insulator equipment in the rigid busbar connection circuit.

[0004] Under seismic loading, equipment, fittings, and the main pipe in a rigid busbar connection circuit not only reciprocate along the main pipe but also sway horizontally. Expansion joint fittings play a crucial role in support, connection, and energy dissipation; if they detach from the main pipe, connection failure will occur, affecting not only electrical functions but also damaging the circuit equipment. Therefore, the seismic performance of expansion joint fittings is paramount, and their ultimate bearing capacity and other mechanical parameters require further research. Currently, designing appropriate testing systems to conduct ultimate bearing capacity tests on expansion joint fittings and obtain their seismic performance mechanical parameters remains a research challenge. Summary of the Invention

[0005] To address the current lack of seismic resistance testing for expansion joint fittings, this invention proposes a seismic performance testing device for expansion joint fittings, comprising:

[0006] Fixed platform;

[0007] The fixing component is fixed to the fixing platform, and one end of it is fixed to one end of the expansion joint hardware being tested;

[0008] An actuating component is fixed to the fixed platform, and its driving end is fixed to the other end of the expansion joint hardware under test; the actuating component, the expansion joint hardware under test, and the fixed component are arranged collinearly, and the expansion joint hardware under test is fixed to the fixed platform;

[0009] A monitoring unit is connected to the actuating component. The monitoring unit is used to measure and collect data on the force and displacement of the tested expansion joint hardware during the loading process.

[0010] Preferably, the tested expansion joint hardware includes: a hardware, a first nut, a second nut, and a nut sliding support;

[0011] One end of the first tube nut and the second tube nut are disposed opposite to each other, the other end of the first tube nut is connected to the actuating part assembly, and the other end of the second tube nut is connected to the fixing part assembly;

[0012] One end of the sliding support of the tube nut is fixed on the fixed platform, and the other end is respectively sleeved on the outside of the first tube nut and the second tube nut, so that the first tube nut and the second tube nut are parallel to the platform surface of the fixed platform.

[0013] The two ends of the fitting are respectively connected to the first nut and the second nut, limiting the distance between the first nut and the second nut.

[0014] Preferably, multiple fittings are provided at intervals, and the multiple fittings are symmetrically arranged on the first nut and the second nut along the axis of the first nut and the second nut.

[0015] Preferably, the sliding support for the tube nut includes: a base and a collar;

[0016] The base is fixed on the fixed platform, and the collar is fixed on the base;

[0017] Two collars are symmetrically provided, and the two collars are respectively sleeved on the outside of the first tube nut and the second tube nut.

[0018] The preferred actuation assembly includes: a loading double-eared hinge and an actuator connected to each other;

[0019] One end of the actuator is the actuating end and the other end is the fixed end;

[0020] The fixed end of the actuator is hinged to the side wall of the fixed platform via a hinge shaft, and the actuating end of the actuator is connected to the first tube nut via the loading double-ear hinge seat.

[0021] Preferably, the actuation direction of the actuator is parallel to the surface of the fixed platform.

[0022] Preferably, the fixing component assembly includes: a fixing reaction seat fixed to the fixing platform;

[0023] The second tube nut is fixedly connected to the side of the fixed reaction seat.

[0024] Preferably, the monitoring unit includes: a force sensor and a displacement gauge;

[0025] The force sensor is connected to the actuating part assembly and is used to collect the force applied to the end of the expansion joint hardware under test;

[0026] The displacement gauge is connected to the actuating part assembly and is used to collect the displacement of the expansion joint fitting tube.

[0027] Based on the same inventive concept, the present invention also provides a method for testing the seismic performance of expansion joint fittings, using the seismic performance testing device for expansion joint fittings as described above, the method comprising:

[0028] The drive connection of the actuating component causes one end of the tested expansion joint hardware to move repeatedly;

[0029] The monitoring unit measures and collects data on the force and displacement of the tested expansion joint hardware during repeated movement.

[0030] The seismic performance parameters of the tested expansion joint hardware are obtained based on the collected force and displacement data.

[0031] Preferably, the repetitive horizontal movement is performed in three cycles, with each cycle increasing the displacement distance according to a set setting.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] This invention provides a seismic performance testing device for expansion joint fittings, characterized in that it comprises: a fixed platform; a fixing component assembly fixed to the fixed platform, one end of which is fixed to one end of the expansion joint fitting under test; an actuating component assembly fixed to the fixed platform, its driving end being fixed to the other end of the expansion joint fitting under test; the actuating component assembly, the expansion joint fitting under test, and the fixing component assembly are arranged collinearly, and the expansion joint fitting under test is fixed to the fixed platform; and a monitoring unit connected to the actuating component, the monitoring unit being used to measure and collect data on the force and displacement of the expansion joint fitting under test during loading. The fixed platform is equipped with a fixed component and an actuating component. The test is conducted by fixing one end and compressing or stretching the other end. When the tested expansion joint hardware is damaged during the stretching or compression process of the actuating component, the ultimate bearing capacity of the expansion joint hardware can be obtained. The actuating component, the tested expansion joint hardware, and the fixed component are arranged collinearly to simulate the reciprocating motion of the expansion joint hardware under earthquake action. The monitoring unit detects the force and displacement data and mechanical performance parameters of the expansion joint hardware during the simulation process of the actuating component, and obtains the ultimate bearing capacity of the tested expansion joint hardware in the horizontal direction and the seismic performance of the expansion joint hardware. Attached Figure Description

[0034] Figure 1 This is a front view of the low-cycle repeated loading test of the expansion joint fitting of the present invention.

[0035] Figure 2This is a side view of the expansion joint hardware structure of the present invention;

[0036] Figure 3 This is a schematic cross-sectional view of the expansion joint hardware structure of the present invention;

[0037] Figure 4 This invention relates to a test method for the seismic performance of expansion joint fittings.

[0038] Figure 5 This is a diagram illustrating the low-cycle repeated loading regime of the expansion joint fittings of the present invention;

[0039] Figure 6 This is a load displacement diagram of the low-cycle repeated loading test of the expansion joint hardware of the present invention;

[0040] Figure 7 This is the peak load-displacement curve of the expansion joint hardware of the present invention during a single loading cycle.

[0041] Among them, 1-fixed platform, 2-fixed part assembly, 2.1-fixed reaction seat, 3-actuator assembly, 3.1-loading double-ear hinge seat, 3.2-actuator, 4-tested expansion joint hardware, 4.1-hardware, 4.2-first tube nut, 4.3-second tube nut, 4.4-tube nut sliding support, 4.4.1-base, 4.4.2-ring. Detailed Implementation

[0042] Example 1:

[0043] This invention provides a test device for the seismic performance of expansion joint fittings, such as... Figure 1 As shown, it includes:

[0044] Fixed platform 1;

[0045] The fixing component 2 is fixed to the fixing platform 1, and one end of it is fixed to one end of the expansion joint fitting 4 to be tested;

[0046] The actuator assembly 3 is fixed to the fixed platform 1, and its driving end is fixed to the other end of the expansion joint hardware 4 under test; the actuator assembly 3, the expansion joint hardware 4 under test and the fixed assembly 2 are arranged in the same line.

[0047] The monitoring unit is connected to the actuating component 3. The monitoring unit is used to measure and collect data on the force and displacement of the tested expansion joint hardware 4 during the loading process.

[0048] The fixed platform 1 is a frame structure, and all components of the expansion joint hardware seismic performance testing device are installed on the fixed platform 1.

[0049] The fixed part assembly 2 and the actuating part assembly 3 are respectively fixed on the fixed platform 1. The fixed part assembly 2 and the actuating part assembly 3 are respectively connected to the two ends of the expansion joint hardware 4 under test. When the test is carried out, the fixed part assembly 2 is stationary, and the actuating part assembly 3 is driven to perform reciprocating motion in the horizontal direction to complete the loading of the expansion joint hardware 4 under test. The actuating part assembly, the expansion joint hardware under test and the fixed part assembly are arranged collinearly to simulate the reciprocating motion generated by the expansion joint hardware under earthquake action.

[0050] The monitoring unit is installed on the actuating part assembly 3. During the loading process, the monitoring unit is used to monitor the mechanical parameters such as the force data and displacement data of the tested expansion joint hardware 4, and finally calculate the seismic performance of the expansion joint hardware.

[0051] like Figure 2 As shown, the tested expansion joint fitting 4 includes: fitting 4.1, first nut 4.2, second nut 4.3, and nut sliding support 4.4;

[0052] One end of the first female connector 4.2 and the second female connector 4.3 are disposed opposite to each other, the other end of the first female connector 4.2 is connected to the actuating part assembly 3, and the other end of the second female connector 4.3 is connected to the fixing part assembly 2;

[0053] One end of the sliding support 4.4 is fixed on the fixed platform 1, and the other end is respectively sleeved on the outside of the first nut 4.2 and the second nut 4.3, so that the first nut 4.2 and the second nut 4.3 are parallel to the platform surface of the fixed platform 1;

[0054] The two ends of the fitting 4.1 are respectively connected to the first nut 4.2 and the second nut 4.3, limiting the distance between the first nut 4.2 and the second nut 4.3.

[0055] The first nut 4.2, the fitting 4.1, and the second nut 4.3 are connected in sequence. The end of the first nut 4.2 away from the fitting 4.1 is connected to the actuating part assembly 3, and the end of the second nut 4.3 away from the fitting 4.1 is connected to the fixing part assembly 2. The nut sliding support 4.4 is located at the bottom of the end of the first nut 4.2 and the second nut 4.3 that are opposite to each other, and supports the first nut 4.2 and the second nut 4.3 respectively, so that the first nut 4.2 and the second nut 4.3 are on the same horizontal line.

[0056] During the test, the fixed part assembly 2 and the second tube nut 4.3 connected to it remain stationary. The actuating part assembly 3 drives the first tube nut 4.2 to move horizontally. The first tube nut 4.2 drives the connected hardware 4.1 to deform during the stretching or compression process, and finally obtains the ultimate bearing capacity of the hardware 4.1.

[0057] Preferably, multiple fittings 4.1 are provided at intervals, and the multiple fittings 4.1 are symmetrically arranged on the first nut 4.2 and the second nut 4.3 along the axis of the first nut 4.2 and the second nut 4.3.

[0058] The first nut 4.2 and the second nut 4.3 are symmetrical about the axis along the direction of actuation. The fittings 4.1 connected to the outer sides of the first nut 4.2 and the second nut 4.3 are symmetrically arranged along the axis of symmetry, and multiple fittings 4.1 are spaced apart and distributed on both sides of the axis of symmetry of the first nut 4.2 and the second nut 4.3, simulating the fixing method of real fittings 4.1. The arrangement of the fittings 4.1 is as follows: Figure 3 As shown.

[0059] Preferably, the sliding support 4.4 for the tube includes: a base 4.4.1 and a collar 4.4.2;

[0060] The base 4.4.1 is fixed on the fixed platform 1, and the collar 4.4.2 is fixed on the base 4.4.1;

[0061] Two collars 4.4.2 are symmetrically provided, and the two collars 4.4.2 are respectively sleeved on the outside of the first tube nut 4.2 and the second tube nut 4.3.

[0062] The sliding support 4.4 for the nut includes: a base 4.4.1 and two collars 4.4.2 connected to the base 4.4.1. The base 4.4.1 is fixed on the fixed platform 1. Two collars 4.4.2 are symmetrically arranged, and the two collars 4.4.2 are respectively fitted onto the first nut 4.2 and the second nut 4.3.

[0063] When loading is applied, the actuating component 3 drives the first tube 4.2 to move horizontally. When the displacement of the first tube 4.2 exceeds a certain distance, the first tube 4.2 will disengage from the collar 4.4.2, causing the tested expansion joint hardware 4 to be damaged.

[0064] Preferably, the actuation component 3 includes: a loading double-ear hinge 3.1 and an actuator 3.2 connected to each other;

[0065] One end of the actuator 3.2 is the actuating end and the other end is the fixed end;

[0066] The fixed end of the actuator 3.2 is hinged to the side wall of the fixed platform 1 via a hinge shaft, and the actuating end of the actuator 3.2 is connected to the first tube 4.2 via the loading double-ear hinge seat 3.1.

[0067] The actuator 3.2, the loading double-ear hinge 3.1, and the first tube 4.2 are connected in sequence. The actuator 3.2 is hinged to the side wall of the fixed platform 1 through the hinge shaft, so that the actuator 3.1 and the first tube 4.2 are on the same horizontal line. The actuator 3.1 and the first tube 4.2 are hinged through the loading double-ear hinge 3.1. The actuating end of the actuator 3.1 drives the first tube 4.2 to reciprocate.

[0068] The actuation direction of the actuator 3.2 is parallel to the surface of the fixed platform 1.

[0069] The actuator 3.2 operates in a direction parallel to the surface of the fixed platform 1, applying horizontal movement.

[0070] Preferably, the fixing component 1 includes: a fixing reaction seat 2.1 fixed on the fixing platform 1;

[0071] The second tube nut 4.3 is fixedly connected to the side of the fixed reaction seat 2.1.

[0072] The fixed reaction seat 2.1 is fixedly connected to the fixed platform. When loading is applied, the fixed reaction seat 2.1 remains stationary so that the tested expansion joint fitting 4 is subjected to force in only one direction. The second tube nut 4.3 is fixedly connected to the side of the fixed reaction seat 2.1, and the axis supporting the second tube nut 4.3 is parallel to the platform surface of the fixed platform 1.

[0073] Preferably, the monitoring unit includes: a force sensor and a displacement gauge;

[0074] The force sensor is connected to the actuating part assembly 3 and is used to collect the force applied to the end of the measured telescopic joint hardware 4.

[0075] The displacement gauge is connected to the actuating part assembly 3 and is used to collect the displacement of the tube section of the expansion joint hardware 4 being measured.

[0076] The force sensor collects the force acting on the tested expansion joint hardware 4, and the displacement of the tested expansion joint hardware 4 is collected by the displacement meter.

[0077] Example 2:

[0078] Based on the same inventive concept, this invention also provides a method for testing the seismic performance of expansion joint fittings, using the seismic performance testing device for expansion joint fittings as described above, such as... Figure 4 As shown, the method includes:

[0079] The drive unit 3, which is connected to the drive, causes one end of the tested expansion joint hardware 4 to move repeatedly.

[0080] The monitoring unit measures and collects data on the force and displacement of the tested expansion joint hardware 4 during repeated movement.

[0081] The seismic performance parameters of the tested expansion joint hardware 4 are obtained based on the collected force and displacement data.

[0082] Preferably, the repetitive horizontal movement is performed in three cycles, with each cycle increasing the displacement distance according to a set setting.

[0083] The repeated motion is low-cycle repeated loading. Based on the structural characteristics of the fitting 4.1, the seismic performance parameters of the tested expansion joint fitting 4 are obtained through the low-cycle repeated loading test, and its seismic performance under seismic load is evaluated.

[0084] The experiment employed a displacement-controlled loading regime. In each cycle, the displacement was increased by a set distance, starting from 0 mm. Each displacement increment was 10 mm, and each increment consisted of three cycles. The loading regime was as follows: Figure 5 As shown.

[0085] During the test, the first nut 4.2 was subjected to tensile and compressive forces. Slippage occurred between the first nut 4.2 and the connected collar 4.4.2. As the pressure slowly increased, the first nut 4.2 slid towards the other end of the actuator 3.2, and the fitting 4.1 bulged under the pressure. As the tensile force slowly increased, the first nut 4.2 was gradually pulled out, and the fitting 4.1 was slowly straightened until the first nut 4.2 was completely detached from the collar 4.4.2, and the fitting 4 of the tested expansion joint was completely destroyed.

[0086] Example 3:

[0087] The low-cycle cyclic loading test load-displacement curve of the tested expansion joint hardware 4 is as follows: Figure 6 As shown.

[0088] As can be seen from the load-displacement diagram, when the tested expansion joint hardware 4 is under compression, the maximum displacement reaches 115mm, at which point the pressure is 3KN; when under tension, the maximum displacement reaches 130mm, at which point the load is 13KN. At this point, the expansion joint hardware detaches from the bottom circular connecting piece, and the test ends.

[0089] Extract the load displacement at the peak value for each loading cycle. The peak load displacement curve is shown below. Figure 7 As shown, the load-displacement curve of the expansion joint hardware can be obtained, and the load-displacement curve can be expressed by the following formula:

[0090] F = 10x

[0091] Where F and x represent the ultimate bearing capacity and displacement of the expansion joint hardware, respectively.

[0092] The above experimental methods were used to obtain the ultimate bearing capacity-displacement curve of the expansion joint hardware in the rigid pipe busbar connection circuit, providing technical parameter support for the seismic performance design and verification of equipment and hardware in actual engineering.

[0093] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0094] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0095] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0096] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0097] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention are included within the scope of the claims of the present invention pending approval.

Claims

1. A test device for the seismic performance of expansion joint fittings, characterized in that, include: Fixed platform (1); The fixing assembly (2) is fixed to the fixing platform (1), and one end is fixed to one end of the expansion joint fitting (4) being tested; The actuating component (3) is fixed to the fixed platform (1), and its driving end is fixed to the other end of the expansion joint fitting (4) under test; the actuating component (3), the expansion joint fitting (4) under test and the fixed component (2) are arranged in a collinear manner; The monitoring unit is connected to the actuating component (3). The monitoring unit is used to measure and collect data on the force and displacement of the tested expansion joint hardware (4) during the loading process.

2. The test device for the seismic performance of expansion joint fittings as described in claim 1, characterized in that, The tested expansion joint fitting (4) includes: fitting (4.1), first nut (4.2), second nut (4.3), and nut sliding support (4.4); One end of the first nut (4.2) and the second nut (4.3) are disposed opposite to each other, the other end of the first nut (4.2) is connected to the actuating part assembly (3), and the other end of the second nut (4.3) is connected to the fixing part assembly (2); One end of the sliding support (4) of the tube nut is fixed on the fixed platform (1), and the other end is respectively sleeved on the outside of the first tube nut (4.2) and the second tube nut (4.3), so that the first tube nut (4.2) and the second tube nut (4.3) are parallel to the platform surface of the fixed platform (1); The two ends of the fitting (4.1) are respectively connected to the first nut (4.2) and the second nut (4.3), limiting the distance between the first nut (4.2) and the second nut (4.3).

3. The test device for the seismic performance of expansion joint fittings as described in claim 2, characterized in that, The fittings (4.1) are provided in multiple intervals, and the multiple fittings (4.1) are symmetrically arranged on the first nut (4.2) and the second nut (4.3) along the axis of the first nut (4.2) and the second nut (4.3).

4. The test device for the seismic performance of expansion joint fittings as described in claim 2, characterized in that, The sliding support (4.4) for the nut includes: a base (4.4.1) and a collar (4.4.2); The base (4.4.1) is fixed on the fixed platform (1), and the collar (4.4.2) is fixed on the base (4.4.1); Two collars (4.4.2) are symmetrically provided, and the two collars (4.4.2) are respectively sleeved on the outside of the first tube nut (4.2) and the second tube nut (4.3).

5. The test device for the seismic performance of expansion joint fittings as described in claim 2, characterized in that, The actuation assembly (3) includes: a loading double-ear hinge (3.1) and an actuator (3.2) connected to each other; One end of the actuator (3.2) is the actuating end and the other end is the fixed end; The fixed end of the actuator (3.2) is hinged to the side wall of the fixed platform (1) via a hinge shaft, and the actuating end of the actuator (3.2) is connected to the first tube nut (4.1) via the loading double-ear hinge seat (3.1).

6. The test device for the seismic performance of expansion joint fittings as described in claim 5, characterized in that, The actuation direction of the actuator (3.2) is parallel to the surface of the fixed platform (1).

7. The test device for the seismic performance of expansion joint fittings as described in claim 2, characterized in that, The fixing assembly (2) includes: a fixing reaction seat (2.1) fixed on the fixing platform; The second tube nut (4.2) is fixedly connected to the side of the fixed reaction seat (2.1).

8. The test device for the seismic performance of expansion joint fittings as described in claim 1, characterized in that, The monitoring unit includes: a force sensor and a displacement meter; The force sensor is connected to the actuating part assembly (3) and is used to collect the force on the end of the tested telescopic joint fitting (4); The displacement gauge is connected to the actuating part assembly (3) and is used to collect the displacement of the tube part of the telescopic joint fitting (4).

9. A method for testing the seismic performance of expansion joint fittings, using the seismic performance testing apparatus for expansion joint fittings as described in any one of claims 1-8, characterized in that, The method includes: The drive unit assembly (3) is connected to the drive unit, causing one end of the tested expansion joint fitting (4) to move repeatedly; The monitoring unit measures and collects data on the force and displacement of the tested expansion joint hardware (4) during repeated movement. The seismic performance parameters of the tested expansion joint fitting (4) are obtained based on the collected force and displacement data.

10. The test method for the seismic performance of expansion joint fittings as described in claim 9, characterized in that, The repetitive horizontal movement consists of three cycles, with each cycle increasing the displacement distance according to a set setting.

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