A decoupling test device for a fall arrester

Abstract

This utility model relates to the technical field of fall arrester unhooking test devices, and proposes a test device for fall arresters, including a steel cable. An installation sleeve is fixedly sleeved on the outer wall of the steel cable. A fixing ring is fixedly sleeved on the outer wall of the installation sleeve. A limiting ring is fixedly sleeved on the outer wall of the installation sleeve, with the limiting ring located above the fixing ring. A sliding cylinder is slidably sleeved on the outer wall of the installation sleeve. An L-shaped connecting rod is fixedly connected to the outer wall of the sliding cylinder. The bottom end of the L-shaped connecting rod slidably passes through the upper surface of the fixing ring. A limiting slot is provided on the side of the L-shaped connecting rod away from the installation sleeve. This technical solution solves the problem in the prior art where, when a heavy object is unhooked, the unhooking device often rebounds and swings due to the release of the elastic energy stored in the lifting wire rope. The rapidly swinging unhooking device may collide with surrounding support equipment, causing damage to the unhooking device.

Description

Technical Field

[0001] This utility model relates to the technical field of fall arrestor disengagement test devices, specifically, to a disengagement test device for fall arrestors. Background Technology

[0002] A fall arrestor is a safety device used to prevent falls from heights. It can quickly brake and lock falling objects within a limited distance and is widely used in high-altitude operations, cargo hoisting, and other fields. Depending on the type of equipment and the usage scenario, fall arrestors need to undergo a disengagement test every six months to a year. The fall arrestor disengagement test is the core link in verifying the safety performance of high-altitude work equipment. By simulating a sudden disengagement scenario, the braking response, swing control, and structural reliability of the fall arrestor are tested.

[0003] When conducting fall arrestor release tests, a release device must be used. During the test, at the moment the weight is released, the release device often rebounds and swings due to the release of the elastic energy stored in the lifting wire rope. The rapidly swinging release device may collide with surrounding support equipment, causing damage. In this case, the release device must be replaced promptly before the test can continue, resulting in not only economic losses but also delays in the experimental process. Therefore, this invention proposes a device for fall arrestor release testing. Utility Model Content

[0004] This invention proposes a release testing device for fall arresters, solving the problem in related technologies where, upon release of a heavy object, the release device often rebounds and swings due to the release of the elastic energy stored in the lifting wire rope. This rapid swinging of the release device may collide with surrounding support equipment, causing damage to the device.

[0005] The technical solution of this utility model is as follows: a disengagement test device for a fall arrestor, comprising a steel cable, an installation sleeve fixedly sleeved on the outer side wall of the steel cable, a fixing ring fixedly sleeved on the outer side wall of the installation sleeve, a limiting ring fixedly sleeved on the outer side wall of the installation sleeve, the limiting ring being located above the fixing ring, a sliding cylinder slidably sleeved on the outer side wall of the installation sleeve, an L-shaped connecting rod fixedly connected to the outer side wall of the sliding cylinder, the bottom end of the L-shaped connecting rod slidably passing through the upper surface of the fixing ring, and a limiting slot being formed on the side of the L-shaped connecting rod away from the installation sleeve. A return spring is slidably fitted onto the outer wall of the mounting sleeve. The two ends of the return spring abut against the sides of the limiting ring and the slide cylinder that are close to each other. A protective cover is fixedly fitted onto the outer wall of the slide cylinder. A pin limiting block is slidably inserted into one side of the fixed ring. A trigger through hole is opened on the upper surface of the pin limiting block. A triangular guide block is fixedly connected to the inner wall of the pin limiting block away from the fixed ring. A reset mechanism is fixedly connected to the outer wall of the fixed ring. A trigger mechanism is fixedly connected to the outer wall of the fixed ring. The trigger mechanism is located below the pin limiting block.

[0006] Preferably, the first reset spring is set in a compressed state.

[0007] Preferably, the pin limiting block extends into the limiting slot.

[0008] Preferably, the reset mechanism includes a U-shaped frame, which is fixedly connected to the outer wall of the fixed ring. The pin limiting block is located on the inner side of the U-shaped frame. A connecting plate is fixedly connected to the side of the pin limiting block away from the fixed ring. Two symmetrically arranged reset springs are fixedly connected to the side of the connecting plate away from the pin limiting block. The end of the reset spring away from the connecting plate abuts against the inner wall of the U-shaped frame.

[0009] Preferably, the second reset spring is set in a compressed state.

[0010] Preferably, the triggering mechanism includes a mounting plate, which is fixedly connected to the outer wall of the fixing ring. A sliding sleeve rod is slidably passed through the upper surface of the mounting plate. A circular limiting block is fixedly sleeved on the outer wall of the sliding sleeve rod, and the circular limiting block abuts against the upper surface of the mounting plate. A trigger rod is slidably inserted into the bottom end of the sliding sleeve rod.

[0011] Preferably, the top end of the sliding sleeve is inclined, and the top end of the sliding sleeve abuts against the triangular inclined surface of the triangular guide block. An adjusting threaded rod is threadedly inserted into the outer wall of the mounting plate, and the adjusting threaded rod abuts against the outer wall of the trigger rod.

[0012] The beneficial effects of this utility model are as follows: 1. Achieve simultaneous decoupling and protection, enhancing experimental safety. Through the linkage design of the triggering mechanism and the reset mechanism, at the moment the unhooking device is triggered, the sliding sleeve pushes the pin limit block to disengage from the limit slot, and the first reset spring quickly drives the slide cylinder and the protective cover to move down, realizing the synchronous completion of "unhooking action and protective cover closure". This can effectively prevent the swing, impact or splashing objects that may be generated at the moment of unhooking from damaging the unhooking device, and solve the problem of equipment damage caused by the lag of protection after unhooking in traditional experiments.

[0013] 2. The structure and linkage are reliable, and the action response is rapid. The first return spring (in a pre-compressed state) provides instantaneous driving force, which, together with the inclined surface of the pin limit block and the limit slot, ensures that the pin quickly disengages and the protective cover falls immediately after the hook is triggered. The response delay can be controlled in milliseconds to avoid affecting the protective effect due to slow action. At the same time, the second return spring continuously applies pre-tightening force to the pin limit block to ensure locking stability in the non-triggered state and prevent false locking.

[0014] 3. High versatility, compatible with various unhooking devices The adjusting threaded rod in the triggering mechanism can flexibly adjust the extension length of the trigger rod, enabling it to precisely connect with the triggering structure of different models and triggering strokes of the unhooker. This eliminates the need to design adapter parts separately for specific unhookers, broadens the applicability of the device, and reduces the specialization cost of experimental equipment.

[0015] 4. Purely mechanical structure design, excellent environmental adaptability The entire system adopts mechanical linkage (spring, inclined plane transmission, pin limit), without relying on electronic components or hydraulic systems. It can work stably in harsh experimental environments such as high and low temperatures (e.g. -30℃ to +85℃), humidity, and dust, avoiding failures caused by electronic component failure or hydraulic oil leakage, and improving the durability and ease of maintenance of the device.

[0016] 5. Simple operation and high experimental efficiency The preparation process of the device only requires two steps: "pulling the slide cylinder to lock" and "adjusting the position of the trigger rod", without the need for complicated debugging. After triggering, the initial state can be quickly restored through the reset mechanism (the pin limit block automatically resets under the action of the second reset spring), which facilitates repeated experiments, reduces the experimental interval time, and improves the testing efficiency. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a perspective view of the entire utility model; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 for Figure 2 Enlarged structural diagram of part A in the middle; Figure 4 This is a schematic diagram of the reset mechanism in this utility model; Figure 5 This is a schematic diagram of the triggering mechanism in this utility model; Figure 6 This is a schematic diagram of the L-shaped connecting rod in this utility model.

[0019] In the diagram: 1. Steel cable; 11. Mounting sleeve; 12. Fixing ring; 13. Limiting ring; 2. Slide cylinder; 21. L-shaped connecting rod; 22. Limiting slot; 23. No. 1 return spring; 3. Protective cover; 4. Pin limiting block; 41. Trigger through hole; 42. Triangular guide block; 5. Reset mechanism; 51. U-shaped frame; 52. Connecting plate; 53. Second reset spring; 6. Triggering mechanism; 61. Mounting plate; 62. Sliding sleeve; 63. Circular limit block; 64. Triggering rod. Detailed Implementation

[0020] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example

[0021] like Figures 1-6 As shown, this embodiment proposes a disengagement test device for a fall arrester, including a steel cable 1. An installation sleeve 11 is fixedly sleeved on the outer wall of the steel cable 1. A fixing ring 12 is fixedly sleeved on the outer wall of the installation sleeve 11. A limiting ring 13 is fixedly sleeved on the outer wall of the installation sleeve 11, with the limiting ring 13 located above the fixing ring 12. A sliding cylinder 2 is slidably sleeved on the outer wall of the installation sleeve 11. An L-shaped connecting rod 21 is fixedly connected to the outer wall of the sliding cylinder 2. The bottom end of the L-shaped connecting rod 21 slidably passes through the upper surface of the fixing ring 12. A limiting slot 22 is formed on the side of the L-shaped connecting rod 21 away from the installation sleeve 11. A first return spring 23 is slidably sleeved on the outer wall of the mounting sleeve 11. The two ends of the first return spring 23 abut against the sides of the limiting ring 13 and the slide cylinder 2 respectively. A protective cover 3 is fixedly sleeved on the outer wall of the slide cylinder 2. A pin limiting block 4 is slidably inserted into one side of the fixing ring 12. A trigger through hole 41 is opened on the upper surface of the pin limiting block 4. A triangular guide block 42 is fixedly connected to the inner wall of the pin limiting block 4 away from the fixing ring 12. A reset mechanism 5 is fixedly connected to the outer wall of the fixing ring 12. A trigger mechanism 6 is fixedly connected to the outer wall of the fixing ring 12. The trigger mechanism 6 is located below the pin limiting block 4.

[0022] The first reset spring 23 is set in a compressed state, and the compressed first reset spring 23 can provide kinetic energy for the reset of the slide cylinder 2.

[0023] The pin limiting block 4 extends into the limiting slot 22, and the pin limiting block 4 can limit the L-shaped connecting rod 21.

[0024] The reset mechanism 5 includes a U-shaped frame 51, which is fixedly connected to the outer wall of the fixing ring 12. The pin limiting block 4 is located on the inner side of the U-shaped frame 51. A connecting plate 52 is fixedly connected to the side of the pin limiting block 4 away from the fixing ring 12. Two symmetrically arranged reset springs 53 are fixedly connected to the side of the connecting plate 52 away from the pin limiting block 4. The end of the reset spring 53 away from the connecting plate 52 abuts against the inner wall of the U-shaped frame 51.

[0025] The second reset spring 53 is set in a compressed state, and the compressed second reset spring 53 can provide the pin limiting block 4 with the kinetic energy to insert into the limiting slot 22.

[0026] The triggering mechanism 6 includes a mounting plate 61, which is fixedly connected to the outer wall of the fixing ring 12. A sliding sleeve rod 62 is slidably passed through the upper surface of the mounting plate 61. A circular limiting block 63 is fixedly sleeved on the outer wall of the sliding sleeve rod 62. The circular limiting block 63 abuts against the upper surface of the mounting plate 61. A trigger rod 64 is slidably inserted into the bottom end of the sliding sleeve rod 62. When the sliding sleeve rod 62 moves upward, it can push the pin limiting block 4 out of the limiting slot 22 through the triangular guide block 42, thereby canceling the limitation on the L-shaped connecting rod 21.

[0027] The top end of the sliding sleeve 62 is inclined and abuts against the triangular inclined surface of the triangular guide block 42. An adjusting threaded rod is threaded into the outer wall of the mounting plate 61. The adjusting threaded rod abuts against the outer wall of the trigger rod 64. Rotating the adjusting threaded rod can release the pressure on the trigger rod 64, thereby adjusting the length of the trigger rod 64 extending out of the sliding sleeve 62.

[0028] Specifically, the unhooking device is installed on the steel cable 1 directly below the device. When using this invention, the slide cylinder 2 needs to be pulled upwards first. The first return spring 23 will be gradually compressed, and the L-shaped connecting rod 21 and the protective cover 3 will move upwards synchronously. When the limiting slot 22 on the L-shaped connecting rod 21 is aligned with the pin limiting block 4, the pin limiting block 4 will be pushed into the limiting slot 22 by the two second return springs 53, thereby fixing the slide cylinder 2 through the L-shaped connecting rod 21. At this time, the triangular guide block 42 will abut against the inclined surface at the top of the sliding sleeve rod 62 under the action of the pin limiting block 4. Then, the adjusting threaded rod needs to be loosened so that the bottom end of the trigger rod 64 is aligned with the unhooking device. The trigger structure abuts against each other, and then the threaded rod is tightened to fix the trigger rod 64. The trigger structure of the unhooking device is usually tilted upward based on the lever principle to achieve the unhooking action. At the moment of unhooking experiment, the trigger structure of the unhooking device will push the trigger rod 64 upward, causing the sliding sleeve rod 62 to move upward. Its top inclined surface pushes the pin limiting block 4 out of the limiting slot 22 through the triangular guide block 42, canceling the limitation on the L-shaped connecting rod 21. At this time, the slide cylinder 2 will move downward quickly under the action of the first return spring 23, thereby causing the protective cover 3 to move downward quickly and cover the unhooking device, realizing the protection of the unhooking device at the same time as unhooking, and preventing damage to the unhooking device.

[0029] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A device for testing the unhooking of a fall arrester, characterised in that, The system includes a steel cable (1), an installation sleeve (11) fixedly sleeved on the outer wall of the steel cable (1), a fixing ring (12) fixedly sleeved on the outer wall of the installation sleeve (11), a limiting ring (13) fixedly sleeved on the outer wall of the installation sleeve (11), the limiting ring (13) being located above the fixing ring (12), a sliding cylinder (2) slidably sleeved on the outer wall of the installation sleeve (11), an L-shaped connecting rod (21) fixedly connected to the outer wall of the sliding cylinder (2), the bottom end of the L-shaped connecting rod (21) slidably passing through the upper surface of the fixing ring (12), a limiting slot (22) being opened on the side of the L-shaped connecting rod (21) away from the installation sleeve (11), and a sliding cylinder (22) being slidably sleeved on the outer wall of the installation sleeve (11). A reset spring (23) is connected to the movable sleeve. The two ends of the reset spring (23) abut against the side of the limiting ring (13) and the slide cylinder (2) respectively. A protective cover (3) is fixedly sleeved on the outer wall of the slide cylinder (2). A pin limiting block (4) is slidably inserted into one side of the fixed ring (12). A trigger through hole (41) is opened on the upper surface of the pin limiting block (4). A triangular guide block (42) is fixedly connected to the inner wall of the pin limiting block (4) away from the fixed ring (12). A reset mechanism (5) is fixedly connected to the outer wall of the fixed ring (12). A trigger mechanism (6) is fixedly connected to the outer wall of the fixed ring (12). The trigger mechanism (6) is located below the pin limiting block (4).

2. The unhooking test device for a fall arrester according to claim 1, characterized in that, The first reset spring (23) is set in a compressed state.

3. The unhooking test device for a fall arrester according to claim 1, characterized in that, The pin limiting block (4) extends into the limiting slot (22).

4. The disengagement test device for a fall arrestor according to claim 1, characterized in that, The reset mechanism (5) includes a U-shaped frame (51), which is fixedly connected to the outer wall of the fixed ring (12). The pin limiting block (4) is located inside the U-shaped frame (51). A connecting plate (52) is fixedly connected to the side of the pin limiting block (4) away from the fixed ring (12). Two symmetrically arranged reset springs (53) are fixedly connected to the side of the connecting plate (52) away from the pin limiting block (4). The end of the reset spring (53) away from the connecting plate (52) abuts against the inner wall of the U-shaped frame (51).

5. The de-hooking test device for a fall arrestor of claim 4, wherein, The second reset spring (53) is set in a compressed state.

6. The device for testing the unhooking of a fall arrester according to claim 1, characterized in that, The triggering mechanism (6) includes a mounting plate (61), which is fixedly connected to the outer wall of the fixing ring (12). A sliding sleeve rod (62) is slidably passed through the upper surface of the mounting plate (61). A circular limiting block (63) is fixedly sleeved on the outer wall of the sliding sleeve rod (62). The circular limiting block (63) abuts against the upper surface of the mounting plate (61). A trigger rod (64) is slidably inserted into the bottom end of the sliding sleeve rod (62).

7. The device for testing the unhooking of a fall arrester according to claim 6, characterized in that, The top end of the sliding sleeve (62) is inclined, and the top end of the sliding sleeve (62) abuts against the triangular inclined surface of the triangular guide block (42). An adjusting threaded rod is threaded into the outer wall of the mounting plate (61), and the adjusting threaded rod abuts against the outer wall of the trigger rod (64).

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