Safety tongs testing device

Abstract

The utility model discloses a safety tongs testing device. The safety tongs testing device comprises a frame; the guide rail is arranged in the vertical direction, and the guide rail is fixedly connected with the frame; the load frame moves along the guide of the guide rail; the test safety tongs are fixedly connected with the load frame, and the guide rail passes through the test safety tongs; the protection safety tongs are fixedly connected with the load frame, the guide rail passes through the protection safety tongs, the protection safety tongs are provided with a first triggering position and a first triggering speed, the protection safety tongs are connected with a first lifting mechanism, and when the load frame reaches the first triggering position or reaches the first triggering speed, the first lifting mechanism is connected with the protection safety tongs. And the protection safety tongs are triggered. And the protection safety tongs carry out secondary protection on the load frame, so that the safety of the safety tongs testing device is improved.

Description

Technical Field

[0001] This utility model generally relates to the field of elevators, specifically to the field of elevator testing, and particularly to a safety clamp testing device. Background Technology

[0002] The safety brake is a safety protection device for elevators. When the elevator speed exceeds the speed limit set by the protective speed governor, or when the suspension rope breaks or slackens, causing the elevator car to stall, the safety brake, in conjunction with the protective speed governor, stops the car in an emergency and clamps it onto the guide rails. It provides effective protection for the safe operation of the elevator and is typically installed on the car frame or counterweight frame. The safety brake needs to be tested to verify its reliability. Usually, the test safety brake is installed on a load frame, which is then subjected to free fall, triggering the test safety brake for testing.

[0003] In the prior art, if the safety clamp fails to operate effectively or fails to stop the load frame in time during the testing process, abnormal overspeed and bottoming out may occur, resulting in damage to the testing device. Utility Model Content

[0004] In view of the above-mentioned defects or deficiencies in the prior art, it is desirable to provide a safety clamp test device to avoid abnormal overspeed bottoming.

[0005] Firstly, the safety clamp testing device of this utility model includes:

[0006] frame;

[0007] A guide rail is provided vertically and is fixedly connected to the frame.

[0008] A load holder that moves along the guide rail;

[0009] A test safety clamp, fixedly connected to the load rack, with the guide rail passing through the test safety clamp; and

[0010] A safety clamp is fixedly connected to the load frame, and a guide rail passes through the safety clamp. The safety clamp is provided with a first trigger position and a first trigger speed, and is connected to a first lifting mechanism.

[0011] The protective safety clamp is triggered when the load rack reaches the first trigger position or reaches the first trigger speed.

[0012] According to the technical solution provided in the embodiments of this application, by setting a protective safety clamp, if the test safety clamp fails to operate effectively or fails to stop the load frame in time, the protective safety clamp is triggered when the load frame reaches the first trigger position or reaches the first trigger speed to stop the load frame or decelerate the load frame, thereby preventing the load frame from abnormally overspeeding and bottoming out. The protective safety clamp provides secondary protection for the load frame, improving the safety of the safety clamp test device. Attached Figure Description

[0013] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the safety clamp testing device according to an embodiment of the present invention. Detailed Implementation

[0015] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the relevant utility model and not intended to limit the scope of the utility model. Furthermore, it should be noted that, for ease of description, only the parts relevant to the utility model are shown in the accompanying drawings.

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] Please refer to Figure 1 The safety clamp testing device of this utility model includes: a frame 100; a guide rail arranged vertically and fixedly connected to the frame 100; a load frame 200 that moves along the guide rail; a test safety clamp fixedly connected to the load frame 200, with the guide rail passing over the test safety clamp; and a protective safety clamp 300 fixedly connected to the load frame 200, with the guide rail passing over the protective safety clamp 300. The protective safety clamp 300 is provided with a first trigger position and a first trigger speed. The protective safety clamp 300 is connected to a first lifting mechanism. When the load frame 200 reaches the first trigger position or reaches the first trigger speed, the protective safety clamp 300 is triggered.

[0018] In an embodiment of this utility model, the test safety clamp is fixedly connected to the load rack 200, and the guide rail passes through the test safety clamp. After the test safety clamp is triggered, the test safety clamp can clamp the guide rail, thereby stopping the load rack 200.

[0019] The safety clamp 300 is fixedly connected to the load rack 200, and the guide rail passes through the safety clamp 300. After the safety clamp 300 is triggered, it can clamp the guide rail, thereby stopping the load rack 200.

[0020] If the test safety clamp is position-triggered, it has a second trigger position. The height at which the load frame 200 moves the test safety clamp to the second trigger position is greater than the height at which the load frame 200 moves the protective safety clamp 300 to the first trigger position. That is, during the free fall of the load frame 200, the test safety clamp is triggered first. After the test safety clamp is triggered, if the load frame 200 continues to fall without being stopped, the protective safety clamp 300 is triggered to stop the load frame 200, ensuring the safety of the safety clamp testing device. After the test safety clamp is triggered and the load frame 200 is stopped, the load frame 200 will not move the protective safety clamp 300 to the first trigger position, and the protective safety clamp 300 will not be triggered. This ensures the reliability of the test data for the test safety clamp. Of course, when the load frame 200 reaches the first trigger speed, the protective safety clamp 300 is triggered to stop the load frame 200, ensuring the safety of the safety clamp testing device.

[0021] If the test safety clamp is speed-triggered, it has a second trigger speed, which is lower than the first trigger speed. That is, when the load frame 200 is in free fall, the test safety clamp is triggered when it reaches the second trigger speed. After the test safety clamp is triggered, the load frame 200 continues to fall without being stopped. When the load frame 200 reaches the first trigger speed, the protective safety clamp 300 is triggered to stop the load frame 200, ensuring the safety of the safety clamp testing device. After the test safety clamp is triggered and the load frame 200 is stopped, it will not reach the first trigger speed, and the protective safety clamp 300 will not be triggered. This ensures the reliability of the test data for the test safety clamp. Of course, when the load frame 200 moves the protective safety clamp 300 to the first trigger position, the protective safety clamp 300 is triggered to stop the load frame 200, ensuring the safety of the safety clamp testing device.

[0022] When the test safety clamp does not activate or fails to stop the load frame 200, the protective safety clamp 300 will be activated when the load frame 200 drives the protective safety clamp 300 to the first trigger position or the load frame 200 reaches the first trigger speed. This will stop the load frame 200 or decelerate it, preventing the load frame 200 from overspeeding and bottoming out. The protective safety clamp 300 provides secondary protection for the load frame 200, improving the safety of the safety clamp test device.

[0023] It is possible, but not limited to, having two guide rails and two test safety clamps. One guide rail passes over one test safety clamp, and the two test safety clamps can be synchronized using a first linkage mechanism. There are also two protective safety clamps 300, with one guide rail passing over one protective safety clamp 300. The two protective safety clamps 300 can be synchronized using a second linkage mechanism 600.

[0024] Furthermore, it also includes a protective speed limiter 400 and a first steel wire rope 410. The first steel wire rope 410 passes around the protective speed limiter 400 and is connected to the first lifting mechanism. When the load frame 200 reaches the first trigger speed, the protective speed limiter 400 is triggered and the first lifting mechanism is lifted through the first steel wire rope 410. The first lifting mechanism triggers the protective safety clamp 300 to operate.

[0025] In this embodiment of the invention, the first wire rope 410 bypasses the protective speed limiter 400, and the first lifting mechanism is connected to the first wire rope 410 and the protective safety clamp 300. During the descent of the load frame 200, the first lifting mechanism is driven to fall as well, and the first lifting mechanism drives the first wire rope 410 to move. The protective speed limiter 400 can be set to an operating speed corresponding to a first trigger speed. When the load frame 200 reaches the first trigger speed, the protective speed limiter 400 reaches its operating speed, actuates, and pulls the first lifting mechanism via the first wire rope 410. The first lifting mechanism triggers the protective safety clamp 300 to actuate, and the protective safety clamp 300 clamps the guide rail to stop the load frame 200.

[0026] During the testing of the safety gear by the safety gear testing device, if the falling speed of the load frame 200 reaches the action speed of the protection speed limiter 400, and the load frame 200 has not reached the first trigger position, the protection speed limiter 400 will be directly triggered and the first lifting mechanism will be pulled through the first steel wire rope 410. The first lifting mechanism will trigger the action of the protection safety gear 300, and the protection safety gear 300 will clamp the guide rail to stop the load frame 200.

[0027] It is possible, but not limited to, that the protection speed limiter 400 is equipped with a second encoder, and that the protection speed limiter 400 can be remotely triggered. The speed can be manually input before the test, and the protection speed limiter 400 will activate after the manually input speed is reached, thus improving the flexibility and versatility of the test.

[0028] Furthermore, it also includes an electromagnetic switch, which is electrically connected to the protection speed limiter 400. A magnetic strip 210 is provided on the load frame 200. When the load frame 200 reaches the first trigger position, the magnetic strip 210 triggers the electromagnetic switch, and the electromagnetic switch triggers the protection speed limiter 400 to operate.

[0029] In this embodiment of the invention, a magnetic strip 210 is provided on the load frame 200. The magnet follows the load frame 200 as it falls. When the magnetic strip 210 reaches the position of the electromagnetic switch, it triggers the electromagnetic switch to operate. The electromagnetic switch then triggers the protective speed limiter 400 to operate. The protective speed limiter 400, in turn, pulls the first lifting mechanism via the first steel wire rope 410. The first lifting mechanism then triggers the protective safety clamp 300 to operate. The protective safety clamp 300 clamps the guide rail to stop the load frame 200. The magnetic strip 210, in conjunction with the electromagnetic switch, enables the position triggering of the protective safety clamp 300.

[0030] Furthermore, the speed limiter 400 is fixedly connected to the top of the frame 100, and the bottom of the frame 100 is rotatably connected to the first lower wheel 110, with the first wire rope 410 passing over the first lower wheel 110.

[0031] In the embodiments of this utility model, the first wire rope 410 passes around the first lower pulley 110 and the protection speed limiter 400 to achieve tensioning of the first wire rope 410 and ensure the reliability of the first wire rope 410.

[0032] Furthermore, it also includes a second steel wire rope 500, on which a trigger block 510 is detachably fixed. The trigger block 510 is located on the movement path of the first lifting mechanism. When the load frame 200 reaches the first trigger position, the trigger block 510 stops the first lifting mechanism.

[0033] In an embodiment of this utility model, by setting a trigger block 510 on the second wire rope 500, when the load frame 200 reaches the first trigger position, the trigger block 510 stops the first lifting mechanism, the first lifting mechanism triggers the protective safety clamp 300, and the protective safety clamp 300 stops the load frame 200, thereby realizing position triggering.

[0034] Furthermore, it also includes an upper wheel 520 and a motor, with a second steel wire rope 500 passing around the upper wheel 520, and the motor driving the upper wheel 520 to rotate.

[0035] In this embodiment of the invention, the upper wheel 520 is driven to rotate by a motor, which in turn moves the second wire rope 500, thereby adjusting the vertical position of the trigger block 510 and thus adjusting the first trigger position of the safety clamp 300 to meet different testing requirements of the safety clamp testing device. Using a motor to adjust the vertical position of the trigger block 510 allows for remote control, making adjustment more convenient and safer.

[0036] Furthermore, it also includes a first encoder, which is electrically connected to the motor.

[0037] In an embodiment of this invention, the first encoder is a rotary sensor that converts the physical quantities of the position and displacement of a rotating component into a series of digital pulse signals. The first encoder not only provides accurate position and speed feedback but also enhances the stability and safety of the motor.

[0038] Furthermore, a second lower wheel 120 is rotatably connected to the bottom of the frame 100, and a second steel wire rope 500 passes around the second lower wheel 120.

[0039] In this embodiment of the invention, the second wire rope 500 passes around the second lower pulley 120 and the upper pulley 520 to achieve tensioning of the second wire rope 500, thereby ensuring the reliability of the second wire rope 500.

[0040] Furthermore, a rope clamp 530 is fixedly connected to the frame 100, and a second wire rope 500 passes through the rope clamp 530.

[0041] In this embodiment of the invention, the rope clamp 530 can clamp or release the second wire rope 500. When the motor rotates and drives the second wire rope 500 to move, and the height of the stop block is adjusted, the rope clamp 530 releases the second wire rope 500. After the height of the stop block is adjusted, the rope clamp 530 clamps the second wire rope 500. When the load frame 200 reaches the first trigger position, the trigger block 510 can effectively stop the first lifting mechanism, thereby triggering the safety clamp 300. Of course, the rope clamp 530 can be remotely driven by a drive mechanism such as a cylinder, hydraulic cylinder, or motor.

[0042] Furthermore, the test safety clamp is located at the bottom of the load rack 200, and the protective safety clamp 300 is located at the top of the load rack 200.

[0043] In this embodiment of the invention, the test safety clamp is located at the bottom of the load rack 200, simulating the position of the actual safety clamp in the car. The protective safety clamp 300 is located at the top of the load rack 200, thus separating the protective safety clamp 300 from the test safety clamp and preventing them from interfering with each other.

[0044] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the utility model involved in this application is not limited to the technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A safety clamp testing device, characterized in that, include: frame; A guide rail is provided vertically and is fixedly connected to the frame. A load holder that moves along the guide rail; A test safety clamp is fixedly connected to the load rack, and the guide rail passes through the test safety clamp; as well as A safety clamp is fixedly connected to the load frame, and a guide rail passes through the safety clamp. The safety clamp is provided with a first trigger position and a first trigger speed, and is connected to a first lifting mechanism. The protective safety clamp is triggered when the load rack reaches the first trigger position or reaches the first trigger speed.

2. The safety clamp testing device according to claim 1, characterized in that, It also includes a protective speed limiter and a first steel wire rope, which bypasses the protective speed limiter and is connected to the first lifting mechanism. When the load frame reaches the first trigger speed, the protective speed limiter is triggered and the first lifting mechanism is lifted by the first wire rope, and the first lifting mechanism triggers the protective safety clamp to operate.

3. The safety clamp testing device according to claim 2, characterized in that, It also includes an electromagnetic switch, which is electrically connected to the protective speed limiter, and a magnetic strip is provided on the load frame. When the load rack reaches the first trigger position, the magnetic strip triggers the electromagnetic switch, and the electromagnetic switch triggers the protection speed limiter to operate.

4. The safety clamp testing device according to claim 2, characterized in that, The protective speed limiter is fixedly connected to the top of the frame, and a first lower wheel is rotatably connected to the bottom of the frame, with the first steel wire rope passing around the first lower wheel.

5. The safety clamp testing device according to claim 1, characterized in that, It also includes a second steel wire rope, to which a trigger block is detachably fixed, the trigger block being located on the movement path of the first lifting mechanism. When the load frame reaches the first trigger position, the trigger block stops the first lifting mechanism.

6. The safety clamp testing device according to claim 5, characterized in that, It also includes an upper wheel and a motor, with the second wire rope passing around the upper wheel and the motor driving the upper wheel to rotate.

7. The safety clamp testing device according to claim 6, characterized in that, It also includes a first encoder, which is electrically connected to the motor.

8. The safety clamp testing device according to claim 6, characterized in that, The bottom of the frame is rotatably connected to a second lower wheel, and the second steel wire rope passes around the second lower wheel.

9. The safety clamp testing device according to claim 5, characterized in that, The frame is fixedly connected to a rope clamp, and the second steel wire rope passes through the rope clamp.

10. The safety clamp testing device according to claim 1, characterized in that, The test safety clamp is located at the bottom of the load rack, and the protective safety clamp is located at the top of the load rack.

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