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CN-121977810-A - Elevator safety gear braking response time testing device and testing method thereof

CN121977810ACN 121977810 ACN121977810 ACN 121977810ACN-121977810-A

Abstract

The invention relates to a test device and a test method for the brake response time of an elevator safety clamp, belonging to the technical field of elevator accessory detection, aiming at the problems of difficult control and no failure protection of the initial state of the existing test device, the device is provided with a slidable test board for installing the safety clamp, a traction part for lifting the test board, a baffle plate of a bearing part for horizontally sliding and bearing and releasing the test board, a double-side synchronous power assembly for driving the baffle plate, reduce the lateral disturbance when the test board releases, establish the protective component who contains buffer board and buffer subassembly, buffer subassembly adopts slope slide hole and compression spring cooperation, converts vertical impact into the buffer resistance, and buffer board top sets up the buffer air post and provides preliminary buffering, and this device is through accurate control test initial condition and provide fail safe, promotes test repeatability and security, is applicable to fields such as elevator accessory detects.

Inventors

  • WANG ZONGJIE
  • Lai Yaoqing
  • WEI FENG
  • LIN CHENXI
  • ZHANG SHAOQIN

Assignees

  • 福州鑫奥特纳科技有限公司

Dates

Publication Date
20260505
Application Date
20260330

Claims (10)

  1. 1. The utility model provides an elevator safety tongs braking response time testing arrangement, includes bottom plate (1), four supporting beams (2) and top frame (3), four supporting beams (2) are fixed in the top of bottom plate (1), top frame (3) with four the top fixed connection of supporting beam (2), its characterized in that, testing arrangement still includes: A test plate (4) slidably mounted between the four support beams (2) and for mounting safety tongs to be tested by means of a mounting bracket (28); The traction component is arranged on the top frame (3) and connected with the test board (4) for lifting the test board (4); A support member mounted to the support beam (2) for supporting the test plate (4) after the test plate (4) is lifted, the support member including a horizontally slidable baffle (11); Wherein, after the baffle (11) is horizontally withdrawn from under the test plate (4), the test plate (4) falls freely to trigger the safety gear brake.
  2. 2. An elevator safety gear brake response time testing device according to claim 1, wherein the traction means comprises: a rotating shaft (5) rotatably connected to the top of the top frame (3); the reel (6) is fixedly sleeved on the rotating shaft (5); A traction rope (8), one end of which is fixed on the scroll (6) and the other end of which is connected with the test board (4); the driving motor (7) is fixed on the top frame (3), and an output shaft of the driving motor is fixedly connected with the rotating shaft (5); The driving motor (7) drives the rotating shaft (5) and the scroll (6) to rotate so as to wind or release the traction rope (8), thereby realizing lifting traction of the test board (4).
  3. 3. An elevator safety gear brake response time testing device according to claim 1, wherein the support member further comprises: the support plate (9) is fixed on the support beam (2), a through groove is formed in the support plate (9), and the baffle (11) penetrates through and is in sliding fit with the through groove; the transmission rod (12) penetrates through and is fixed on the baffle plate (11), and two ends of the transmission rod extend to two sides of the top frame (3); the power components are arranged on two sides of the top frame (3) and are connected with two ends of the transmission rod (12); The power assembly is used for driving the transmission rod (12) to drive the baffle plate (11) to horizontally slide in the through groove so as to realize withdrawal or resetting from the lower part of the test plate (4).
  4. 4. An elevator safety gear brake response time testing device according to claim 3, wherein the power assembly comprises: an electric push rod (14) fixed on one side of the top frame (3); a connecting rod (15) fixed to the output shaft of the electric push rod (14); The two ends of the connecting rod (13) are respectively and rotatably connected with the connecting rod (15) and the end part of the transmission rod (12); the electric push rod (14) drives the connecting rod (15) to move vertically, and is driven by the connecting rod (13) to convert the vertical movement into the horizontal movement of the driving rod (12) so as to drive the baffle plate (11) to slide.
  5. 5. An elevator safety gear brake response time testing device according to claim 3, wherein said support member further comprises: the support cover (10) is fixed on one side of the supporting plate (9), and one end of the baffle plate (11) stretches into the support cover (10) and is in sliding connection with the support cover (10); a pressure sensor (16) mounted on the inner wall of the bracket (10); A controller electrically connected to the pressure sensor (16), the safety gear and the timer; When the baffle plate (11) is completely withdrawn and is pressed against the pressure sensor (16), the pressure sensor (16) sends a signal to the controller, and the controller immediately triggers the safety gear to brake and starts the timer to count.
  6. 6. An elevator safety gear brake response time testing device according to claim 1, characterized in that the testing device further comprises: The protection component is arranged on the bottom plate (1) and is used for buffering the falling test plate (4) when the braking of the safety tongs fails; The guard member includes: the transmission frame (23) is fixed at the top of the bottom plate (1) and provided with an inclined slide hole (24); a buffer plate (17) slidably mounted between the four support beams (2) and positioned below the test plate (4); the buffer assembly is arranged at the bottom of the buffer plate (17) and is in sliding fit with the sliding hole (24); When the falling test plate (4) impacts the buffer plate (17), the buffer assembly slides along the sliding hole (24) to convert vertical impact into buffer resistance.
  7. 7. The elevator safety gear brake response time testing device of claim 6, wherein the buffer assembly comprises: A mounting plate (20) fixed to the bottom of the buffer plate (17); the sliding rod (21) is fixedly arranged between the two mounting plates (20); the moving plate (22) is sleeved on the sliding rod (21) in a sliding manner; A sliding plate (25), one end of which is fixedly connected with the moving plate (22), and the other end of which penetrates through and is in sliding fit with the sliding hole (24); a compression spring (26) sleeved on the sliding rod (21), and two ends of the compression spring are respectively abutted against the moving plate (22) and the mounting plate (20); When the buffer plate (17) moves downwards, the sliding plate (25) slides downwards along the sliding hole (24) in an inclined way, and drives the moving plate (22) to compress the compression spring (26), so that impact energy is absorbed.
  8. 8. An elevator safety gear brake response time testing device according to claim 7, characterized in that the protective means further comprises a plurality of buffer air columns (18) fixed to the top of the buffer plate (17), the buffer air columns (18) being adapted to provide a preliminary buffer when the test plate (4) is in contact with the buffer plate (17).
  9. 9. An elevator safety gear brake response time testing device according to any one of claims 2 to 8, characterized by two limit rails (27) fixed between the floor (1) and the top frame (3), the limit rails (27) being adapted to cooperate with the working surface of the safety gear to be tested for guiding and braking the test plate (4) during the braking of the safety gear.
  10. 10. A test method applied to an elevator safety gear brake response time test device according to any one of claims 1 to 9, characterized by comprising the steps of: S1, mounting and preparing, namely mounting safety tongs on two mounting frames (28) at the bottom of a test board (4), ensuring that the safety tongs are matched with two limit guide rails (27) symmetrically and fixedly mounted at the top of a bottom board (1), and simultaneously checking whether the connection of all parts of the test device is stable or not, wherein the safety tongs comprise a traction part, a bearing part, a protection part and the like; S2, pulling the test board, namely starting a driving motor (7), driving the rotating shaft (5) to rotate by the driving motor (7), driving the scroll (6) to rotate by the rotating shaft (5), winding the pulling rope (8) on the scroll (6), and pulling the test board (4) upwards by utilizing the pulling rope (8) until the test board (4) moves to the position above the supporting part capable of being supported by the supporting part; S3, supporting the test board by using two baffles (11) of the supporting component, wherein the test board (4) stops moving upwards at the moment, and starting a driving motor (7) to drive a rotating shaft (5) to rotate reversely, and releasing a traction rope (8) to enable the traction rope (8) to lose traction force on the test board (4), but the test board (4) is still supported by the baffles (11); S4, preparing free falling, namely starting an electric push rod (14) of the two power assemblies, wherein the electric push rod (14) drives a connecting rod (15) to move downwards, the connecting rod (15) drives two transmission rods (12) to be away from each other through two connecting rods (13), and the transmission rods (12) drive two baffles (11) to be away from each other until the baffles (11) move to be separated from contact with the bottom of the test board (4); s5, triggering the safety tongs and timing, namely after the baffle plate (11) moves to a position separated from the test board (4), generating pressure on the pressure sensor (16) on the inner wall of the supporting cover (10), starting the safety tongs through the controller after the pressure sensor (16) senses the pressure, and starting the timer by the controller at the same time, and starting timing on the running time of the safety tongs; S6, testing the braking response time of the safety tongs, namely, the test board (4) performs free falling movement downwards under the action of gravity, simulating the downward falling condition of the elevator, after the safety tongs are triggered, clamping and braking the limit guide rail (27) to stop falling of the test board (4), and after the safety tongs clamp and position the limit guide rail (27), pausing a timer, and controlling a display screen (19) to display the counted time, wherein the counted time is the response time of the safety tongs; S7, safety protection (if safety clamp braking fails) is achieved, if the safety clamp fails to work, the test plate (4) loses braking effect, the test plate (4) continues to fall, two mounting frames (28) fall on the buffer plate (17) to drive two buffer components to move downwards, sliding plates (25) of the buffer components move downwards along corresponding sliding holes (24) in an inclined mode to drive moving plates (22) to move along sliding rods (21), compression springs (26) are compressed, buffer supporting is carried out on the buffer plate (17) by utilizing the elasticity of the compression springs (26), meanwhile, a plurality of buffer air columns (18) at the top of the buffer plate (17) support the test plate (4), and direct contact between the two mounting frames (28) and the buffer plate (17) is avoided, so that the broken safety clamp is prevented from being damaged; And S8, overhauling the safety tongs with faults, repeating the steps S1-S7 after the overhauling is finished, and performing multiple tests to obtain more accurate safety tongs braking response time data.

Description

Elevator safety gear braking response time testing device and testing method thereof Technical Field The invention relates to the technical field of elevator accessory detection, in particular to an elevator safety gear braking response time testing device and an elevator safety gear braking response time testing method. Background In the field of detection of elevator safety tongs, a common test method is generally developed around how to simulate the falling condition of an elevator car, and a typical method is that a simulated load provided with the safety tongs is lifted to a certain height by a manual or simple lifting mechanism and then released, whether the safety tongs can finish braking on a preset guide rail is observed, and the technical focus of the method is often whether the gravitational potential energy of the simulated load is enough to trigger the safety tongs to act; When the test is implemented, the structural design of the test device is subject to some limitations due to the fact that the release and the braking triggering of the load are both required in the test process, for example, in order to facilitate the release of the load, the support structure is required to be withdrawn quickly, but the introduction of the withdrawal action may cause the initial state of the release of the load (such as levelness and initial clearance with the guide rail) to generate little change which is not easy to control, in some cases, the little difference of the initial state may interfere the contact process of the wedge block of the safety tongs with the guide rail, thereby affecting the repeatability of the braking response time measurement, in addition, when the test load is lifted to a high position, if the safety tongs completely fail in the test, the load directly falls on the rigid structure at the bottom, and the risk of damaging the test load and the device itself exists, which restricts the repeatable performance of the test process and the safe operation space of the test personnel to a certain extent; therefore, how to simulate the free-fall working condition and control the initial test condition more accurately and provide necessary failure protection in the test is a direction which can be further considered in the structural design of the related test device; Aiming at the problems, the technical scheme provides a device and a method for testing the braking response time of the safety gear of the elevator. Disclosure of Invention The invention aims to solve the problems of difficult control and no failure protection of the initial state of the conventional testing device, and provides a testing device and a testing method for the braking response time of an elevator safety clamp. In order to achieve the above purpose, the present invention adopts the following technical scheme: The utility model provides an elevator safety tongs braking response time testing arrangement, includes bottom plate, four supporting beams and top frame, four supporting beams are fixed in the top of bottom plate, top frame with four the top fixed connection of supporting beams, testing arrangement still includes: the test board is slidably arranged among the four supporting beams and is used for installing safety tongs to be tested through the installation frame; The traction component is arranged on the top frame, connected with the test board and used for lifting the test board; a supporting member mounted to the support beam for supporting the test plate after the test plate is lifted, the supporting member including a barrier plate horizontally slidable; Wherein, after the baffle is withdrawn from below the test plate horizontally, the test plate falls freely to trigger the safety tongs to brake. In one possible design, the traction means comprises: The rotating shaft is rotatably connected to the top of the top frame; The reel is fixedly sleeved on the rotating shaft; One end of the traction rope is fixed on the scroll, and the other end of the traction rope is connected with the test board; the driving motor is fixed on the top frame, and an output shaft of the driving motor is fixedly connected with the rotating shaft; the driving motor drives the rotating shaft and the scroll to rotate so as to wind or release the traction rope, thereby realizing lifting traction of the test board. In one possible design, the support member further comprises: The support plate is fixed on the support beam, a through groove is formed in the support plate, and the baffle plate penetrates through and is in sliding fit with the through groove; the transmission rod penetrates through and is fixed on the baffle plate, and two ends of the transmission rod extend to two sides of the top frame; The power components are arranged on two sides of the top frame and are connected with two ends of the transmission rod; the power assembly is used for driving the transmission rod to drive the baffle to horizontally slide in the thro