Impact load testing machine for track lock

Abstract

The utility model relates to a kind of impact load testing machine of track self-locker, belongs to the technical field of self-locker performance test.In the top of test tower (1), lifting mechanism is provided, connecting steel cable (5) leading out from self-lifting mechanism is connected heavy hammer (10) by releaser (7), guide rail (9) is vertically arranged on the surface of test tower (1), and the self-locker (4) to be measured is clamped on the surface of guide rail (9), and heavy hammer (10) is connected with the brake arm of the self-locker (4) to be measured, characterized by: displacement sensor is further provided on test tower (1), displacement sensor is connected with the self-locker (4) to be measured, and it is used for measuring the buffer distance that heavy hammer (10) pulls down the self-locker (4) to be measured after losing weight.In the impact load testing machine of track self-locker of the utility model, the distance that the self-locker to be measured falls with the heavy hammer is accurately measured by setting displacement sensor, so as to obtain the buffer distance after triggering, and the performance test is further realized.

Description

Technical Field

[0001] An impact load testing machine for a track self-locking device belongs to the field of performance testing technology for self-locking devices. Background Technology

[0002] Currently, when working in high-altitude environments, especially in fields such as wind power generation, construction, and fire rescue, protective equipment is required to prevent accidental falls. Among these, a rail self-locking device is a common type of protective equipment. The rail self-locking device's wing plate works in conjunction with the guide rail. When the worker is moving up and down normally, the self-locking device can move up and down along the guide rail. If the worker loses their footing, the self-locking device will lock itself onto the guide rail immediately to prevent a fall.

[0003] Therefore, impact tests simulating a person's fall are an important means of verifying the performance of rail self-locking devices. In the existing technology, there are also some schemes for impact load tests on rail self-locking devices, such as the technical solutions described in Chinese invention patent application number 201010000806.2 (filed January 18, 2010) entitled "Multifunctional Fall Arrestor Test Tower," the technical solutions described in Chinese invention patent application number 202010433309.5 (filed May 20, 2020) entitled "A Test Tower Device," and the technical solutions described in Chinese utility model patent application number 201220239789.2 (filed May 25, 2012) entitled "Guide Rail Fall Arrestor Fall Test Device."

[0004] Existing technologies, including the aforementioned solutions, primarily rely on sensors to detect the pulling force on a person during a simulated fall. However, the buffer height from triggering to locking of the self-locking device during a fall is also a crucial parameter. A small buffer height can cause significant impact, while a large buffer height poses a safety hazard. Chinese invention patent application number 202510334824.0, filed on March 20, 2025, entitled "A Reliability Testing Device for a Guide Rail Self-Locking Device," describes a method for detecting the buffer height. In this method, multiple sensors are arranged along the movement direction of the self-locking device, and the buffer height can be obtained by triggering the sensors. However, this method only determines compliance based on whether the sensors are triggered, and cannot determine the specific buffer height. Therefore, designing a technical solution that can accurately measure the buffer height of the self-locking device to precisely determine its performance has become a pressing problem in this field. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide an impact load testing machine for a track self-locking device that can accurately measure the distance of the self-locking device to be tested as it falls with the weight by setting a displacement sensor, so as to obtain the buffer distance after its triggering, and further realize the testing of its performance.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: The impact load testing machine for the track self-locking device includes a test tower, a lifting mechanism is set at the top of the test tower, a connecting steel cable led out from the lifting mechanism is connected to the weight through a release device, a guide rail is arranged vertically on the surface of the test tower, the self-locking device to be tested is clamped on the surface of the guide rail, and the weight is connected to the brake arm of the self-locking device to be tested. The feature is that a displacement sensor is also set on the test tower, the displacement sensor is connected to the self-locking device to be tested, and is used to measure the buffer distance that pulls the self-locking device to be tested down after the weight of the weight is lost.

[0007] Preferably, the displacement sensor is a pull-rope displacement sensor located directly above the self-locking device under test, and the test rope leading out from the pull-rope displacement sensor is connected to the self-locking device under test.

[0008] Preferably, the displacement sensor is a grating ruler, with the scale grating of the grating ruler located parallel to one side of the guide rail. The grating reading head in the grating ruler is connected to the side of the self-locking device under test.

[0009] Preferably, a top plate is horizontally installed at the top of the test tower, with the front end of the top plate extending forward beyond the front side of the test tower, and the lifting mechanism is an electric hoist fixed to the front end of the top plate.

[0010] Preferably, the upper part of the release device is hooked to the bottom of the connecting steel cable, and the lower part of the release device is connected to the counterweight by adsorption.

[0011] Preferably, the release device is an electromagnet, a connecting rod is provided in the middle of the weight, a connecting frame is connected to the connecting rod, and the top of the connecting frame is a metal plate for adsorption in conjunction with the electromagnet.

[0012] Preferably, an impact hook is also connected to the counterweight, and the impact hook is connected to the brake arm of the self-locking device under test via a steel cable.

[0013] Preferably, the impact hook includes two hook sections, one of which is connected to the counterweight, and the other of which is connected to the brake arm of the self-locking device under test via a steel cable. The two hook sections are connected by a tension sensor.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] In the impact load testing machine for the track self-locking device of this application, by setting a displacement sensor, the distance that the self-locking device under test falls as it falls with the weight can be accurately measured, so as to obtain the buffer distance after its triggering, and further realize the testing of its performance.

[0016] The release mechanism, implemented using an electromagnet, allows for precise control of the hammer's descent, thus improving experimental accuracy.

[0017] By installing a tension sensor, the tension at the drop buffer height of the self-locking device can be measured, allowing for accurate assessment of the impact on workers. Attached Figure Description

[0018] Figure 1 This is an isometric view of Example 1 of the impact load testing machine for a track self-locking device.

[0019] Figure 2 This is a front view of Example 1 of the impact load testing machine for a track self-locking device.

[0020] Figure 3 for Figure 2 The left view.

[0021] Figure 4 This is a front view of Example 2 of the impact load testing machine for a track self-locking device.

[0022] The components include: 1. Test tower; 2. Top plate; 3. Test rope; 4. Self-locking device under test; 5. Connecting steel cable; 6. Hook; 7. Release device; 8. Connecting frame; 9. Guide rail; 10. Counterweight; 11. Fixing plate; 12. Electric hoist; 13. Pull rope displacement sensor; 14. Impact hook; 15. Tension sensor; 16. Grating ruler. Detailed Implementation

[0023] Figures 1-3 This is the preferred embodiment of the present invention, which is described below in conjunction with the appendix. Figures 1-4 The present invention will be further described below.

[0024] Example 1:

[0025] like Figures 1-2 As shown, an impact load testing machine for a track self-locking device includes a test tower 1 vertically arranged on the ground, the test tower 1 being a rigid frame structure. A fixing plate 11 is vertically arranged in the middle of the front side of the test tower 1, and a guide rail 9 is also vertically arranged at the center of the front side of the fixing plate 11, the self-locking device 4 to be tested is clamped onto the surface of the guide rail 9.

[0026] A top plate 2 is horizontally installed at the top of the test tower 1, with its front end extending forward beyond the front side of the test tower 1. An electric hoist 12 is fixed to the lower surface of the front end of the top plate 2. A hook 6 is connected to the bottom of the connecting steel cable 5 extending from the electric hoist 12, and a release device 7 is attached to the bottom of the hook 6. The release device 7 is implemented using an electromagnet known in the art, such as the technical solution described in Chinese invention patent application number 202510334824.0, filed on March 20, 2025, entitled "A Reliability Testing Device for a Guide Rail Self-Locking Device". The specific release principle and process will not be elaborated further.

[0027] Combination Figure 3 A counterweight 10 is located below the hook 6. A connecting rod is located in the middle of the counterweight 10, and a connecting frame 8 is connected to the connecting rod. The top of the connecting frame 8 is a metal plate for engaging with the release device 7. An impact hook 14 is also connected to the connecting rod in the middle of the counterweight 10. The impact hook 14 consists of two hook sections. One hook section is connected to the connecting rod in the middle of the counterweight 10, and the other hook section is connected to the brake arm of the self-locking device 4 under test, which is mounted on the guide rail 9, via a steel cable (not shown in the figure). The two hook sections are connected by a tension sensor 15.

[0028] A pull rope displacement sensor 13 is also provided on the lower surface of the top plate 2. The body of the pull rope displacement sensor 13 is fixed on the lower surface of the top plate 2 and located directly above the self-locking device 4 to be tested. The test rope 3 led out from the pull rope displacement sensor 13 extends downward to the self-locking device 4 to be tested and is connected to the self-locking device 4 to be tested.

[0029] The specific working process and working principle are as follows:

[0030] After connecting the steel cable 5, hook 6, release device 7, connecting frame 8, and counterweight 10 in sequence, the electric hoist 12 is started to hoist the counterweight 10 to the test height, and the impact hook 14 is connected to the brake arm of the self-locking device 4 under test via the steel cable. The tester cuts off the power to the electromagnet coil. After the electromagnet coil loses power and the magnetic force disappears instantly, the counterweight 10 is released and begins to fall freely.

[0031] After the weight 10 falls freely, it simulates a person falling accidentally. When the weight 10 has fallen a certain distance, the brake arm of the self-locking device 4 under test is pulled down through the impact hook 14 and the steel cable connected to the impact hook 14. After the self-locking device 4 under test is triggered, it falls a certain distance and locks with the guide rail 9.

[0032] The displacement difference measured by the rope displacement sensor 13 can be used to measure the buffer distance after the self-locking device 4 under test is triggered. At the same time, the tension value measured by the tension sensor 15 can be used to obtain the tension of the self-locking device 4 under test on the falling person, so as to further determine whether the self-locking device 4 under test meets the test requirements.

[0033] Example 2:

[0034] The difference between this embodiment and Embodiment 1 lies in the method of measuring the buffer distance of the self-locking device 4 under test. In this embodiment, the buffer distance of the self-locking device 4 under test is measured using a grating ruler 16. For example... Figure 4 As shown, the scale grating of the grating ruler 16 is fixed to the surface of the fixing plate 11 and is located parallel to one side of the guide rail 9. The grating reading head, which is slidably connected to the scale grating in the grating ruler 16, is connected to the side of the self-locking device 4 under test. The grating reading head and the self-locking device 4 under test are preferably connected by a rigid connection, such as through a connecting plate. When the weight 10 falls freely and triggers the self-locking device 4 under test, it drives the grating reading head to fall synchronously, thereby realizing the measurement of its buffer distance.

[0035] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model without departing from its technical solution shall still fall within the protection scope of this utility model.

Claims

1. An impact load testing machine for a track self-locking device, comprising a test tower (1), a lifting mechanism being provided at the top of the test tower (1), a connecting steel cable (5) extending from the lifting mechanism being connected to a weight (10) via a release device (7), a guide rail (9) being arranged vertically on the surface of the test tower (1), a self-locking device (4) to be tested being mounted on the surface of the guide rail (9), and the weight (10) being connected to the brake arm of the self-locking device (4) to be tested, characterized in that: A displacement sensor is also installed on the test tower (1). The displacement sensor is connected to the self-locking device (4) under test and is used to measure the buffer distance that the self-locking device (4) under test is pulled down after the weight (10) loses weight.

2. The impact load testing machine for the track self-locking device according to claim 1, characterized in that: The displacement sensor is a pull rope displacement sensor (13) located directly above the self-locking device (4) under test. The test rope (3) led out from the pull rope displacement sensor (13) is connected to the self-locking device (4) under test.

3. The impact load testing machine for the track self-locking device according to claim 1, characterized in that: The displacement sensor is a grating ruler (16). The scale grating of the grating ruler (16) is parallel to one side of the guide rail (9). The grating reading head in the grating ruler (16) is connected to the side of the self-locking device (4) to be tested.

4. The impact load testing machine for the track self-locking device according to claim 1, characterized in that: A top plate (2) is horizontally installed at the top of the test tower (1). The front end of the top plate (2) extends forward from the front side of the test tower (1). The lifting mechanism is an electric hoist (12) fixed at the front end of the top plate (2).

5. The impact load testing machine for the track self-locking device according to claim 1, characterized in that: The upper part of the release device (7) is attached to the bottom of the connecting steel cable (5) by a hook (6), and the lower part of the release device (7) is connected to the weight (10) by adsorption.

6. The impact load testing machine for the track self-locking device according to claim 5, characterized in that: The release device (7) is an electromagnet, and a connecting rod is provided in the middle of the weight (10). A connecting frame (8) is connected to the connecting rod, and the top of the connecting frame (8) is a metal plate for adsorption in conjunction with the electromagnet.

7. The impact load testing machine for the track self-locking device according to claim 1, characterized in that: An impact hook (14) is also connected to the hammer (10), and the impact hook (14) is connected to the brake arm of the self-locking device (4) under test via a steel cable.

8. The impact load testing machine for the track self-locking device according to claim 7, characterized in that: The impact hook (14) includes two hook sections, one of which is connected to the hammer (10), and the other is connected to the brake arm of the self-locking device (4) under test via a steel cable. The two hook sections are connected by a tension sensor (15).

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