Elevator steel wire rope bearing performance testing device

Abstract

The invention provides an elevator steel wire rope bearing performance testing device which comprises a base, a top plate is fixedly connected to the base through a plurality of supporting legs, fixing rings are fixed to the bottoms of the left side, the right side and the rear side of the top plate, steel wire ropes are bound to the fixing rings, and hooks are installed at the lower ends of the steel wire ropes. An installation cover is further fixedly installed among the supporting legs, three penetrating holes allowing the corresponding steel wire ropes to penetrate through are formed in the top of the installation cover, a rotary disc capable of moving up and down and rotating forwards and backwards is installed in the installation cover, and extrusion plates capable of moving in the radial direction to extrude the steel wire ropes are installed on the left side, the right side and the rear side of the rotary disc. And an electric rotating seat is also mounted on the base. The device can wear three steel wire ropes at the same time and can respectively control the wear strength, so that the bearing performance of the steel wire ropes in different wear states can be tested, and not only can static load test be performed, but also the instant bearing capacity of the steel wire ropes can be tested.

Description

Technical Field

[0001] The invention relates to the technical field of steel wire rope performance testing, and in particular to a device for testing the load-bearing performance of elevator steel wire ropes. Background Art

[0002] Elevator ropes are a vital component of the elevator system, carrying the weight of the elevator car and its load, and ensuring the elevator moves up and down the shaft safely and smoothly.

[0003] At present, the detection of the load-bearing state of wire ropes mainly includes performance detection under static load and motion state detection under dynamic load. The performance detection under static load is mainly carried out by tensile testing machine for tensile loading test and measured by extensometer. However, in actual use, during the winding process of wire rope, there will be large friction between the wire rope and the winding wheel or between the ropes under load. Long-term friction will cause the wear of the wire rope, and the existing static load test cannot test the performance of the wire rope under different wear conditions. In addition, in elevators, the limit mechanism may fail occasionally and fall may occur. At this time, the wire rope needs to bear the instantaneous tension, and the current static load test cannot meet the test requirements. Summary of the invention

[0004] In view of the above problems, the present invention provides an elevator wire rope bearing performance testing device, which can wear three wire ropes at the same time and can control the wear intensity separately, so as to test the bearing performance of the wire ropes under different wear conditions. It can not only perform static load tests, but also test the instantaneous bearing capacity of the wire ropes.

[0005] To solve the above problems, the technical solution adopted by the present invention is:

[0006] The lifting of the ...

[0007] Preferably, a rotating rod is fixedly connected to the center of the turntable. The upper end of the rotating rod penetrates through the installation cover. A gear is rotatably connected to the top of the installation cover. The gear is provided with a through hole for the rotating rod to pass through. A plurality of limiting strips are fixedly connected to the side wall of the rotating rod. The inner wall of the through hole is provided with a limiting groove adapted to the limiting strips. A first cylinder is installed on the top of the installation cover. The telescopic end of the first cylinder is fixedly connected to a toothed plate meshing with the gear.

[0008] Preferably, a second cylinder is installed on the top plate. The telescopic end of the second cylinder is rotatably connected to the upper end of the rotating rod.

[0009] Preferably, hydraulic cylinders are installed inside the left and right sides and the rear side of the turntable. The telescopic ends of the hydraulic cylinders are fixedly connected to the corresponding pressing plates. The pressing plates are arc-shaped plates, and anti-slip patterns are arranged on the outer sides of the pressing plates.

[0010] Preferably, cylinders are fixedly connected to the left and right sides and the rear side of the electric rotating base. A connecting rod is elastically connected inside the cylinder through a first spring. The upper end of the connecting rod extends out of the cylinder and is fixedly connected to the arc-shaped pull rod.

[0011] Preferably, sliding grooves are provided on the side walls of the two fixing plates. Guide rods are fixedly connected inside the sliding grooves. Two sliders slidingly matched with the guide rods are fixedly connected to both sides of the counterweight box.

[0012] Preferably, the buffer mechanism includes a resisting plate sleeved on the guide rod. A second spring is sleeved on the guide rod between the resisting plate and the bottom of the sliding groove. The end of the resisting plate extends out of the sliding groove.

[0013] Preferably, a threaded rod is rotatably connected to the side wall of one of the fixing plates. A motor capable of driving the threaded rod to rotate is also installed on the fixing plate. A U-shaped plate is threadedly connected to the threaded rod. The side wall of the fixing plate is provided with a strip-shaped opening for the two ends of the U-shaped plate to pass through. A docking mechanism capable of docking with the corresponding two sliders is installed on the U-shaped plate.

[0014] Preferably, the docking mechanism includes a third cylinder installed on the side wall of the U-shaped plate. The telescopic end of the third cylinder is fixedly connected to a U-shaped rod. The two ends of the U-shaped rod penetrate through the U-shaped plate. Docking grooves adapted to the U-shaped rod are provided on the side walls of the two corresponding sliders.

[0015] Preferably, a plug rod is fixedly connected inside the counterweight box. A plurality of counterweight blocks are inserted on the plug rod. A hanging ring adapted to a hook is installed on the top of the counterweight box.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. By installing a turntable and three pressing plates, three steel wire ropes can be respectively tied to three fixed rings. The steel wire ropes pass through the through holes of the installation cover. Pull up the arc-shaped pull rod so that the hooks at the lower ends of the steel wire ropes are hung on the arc-shaped pull rod. Under the action of the first spring, the three steel wire ropes are kept in a vertically tightened state. Then start the three hydraulic cylinders respectively to make the pressing plates press the steel wire ropes, and the pressing force can be controlled respectively. Finally, start the first air cylinder to drive the toothed plate to move left and right reciprocally, and then drive the turntable to rotate forward and backward quickly through the gear and the rotating rod, so that the pressing plates can rub the steel wire ropes reciprocally, making the three steel wire ropes in different wear states and testing the bearing performance more comprehensively.

[0018] 2. By installing the second air cylinder, it can drive the turntable to move up and down, and then a section of the steel wire rope located inside the installation cover can be worn, which is more in line with the wear state of the steel wire rope in reality and improves the test accuracy.

[0019] 3. By installing an electric rotating seat, the counterweight box can be driven to rotate to the lower part of the three steel wire ropes in turn, which is convenient to use. The hook at the lower end of the steel wire rope directly hangs on the hanging ring at the top of the counterweight box, and then add or reduce counterweight blocks to the counterweight box to test the bearing capacity of the steel wire rope under static conditions.

[0020] 4. By installing a threaded rod and a docking mechanism, after the steel wire rope hangs the counterweight box, the motor can be started to drive the threaded rod to rotate, and then drive the counterweight box to rise to the top through the U-shaped plate and the slider. Then start the third air cylinder to make the U-shaped rod leave the docking groove of the slider, so that the counterweight box is in a released state, and the counterweight box slides down naturally, instantly straightening the steel wire rope to test the tensile force value that the steel wire rope can withstand instantly.

[0021] 5. By installing a buffer mechanism, during the test, after the performance exceeding the load of the steel wire rope, the steel wire rope breaks, and the counterweight box will slide down to the bottom plate and achieve buffering under the action of the second spring to avoid damaging the equipment. Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is a cross-sectional view of two fixing plates proposed by the present invention;

[0024] Figure 3 is a top view of the electric rotating seat proposed by the present invention;

[0025] Figure 4 is Figure 1 a magnified schematic view of the structure at A in

[0026] Figure 5 is a top view sectional view of the installation cover and the turntable proposed by the present invention;

[0027] Figure 6Schematic diagram of the test state of the present invention.

[0028] In the figure: 1 base, 2 electric rotating seat, 3 motor, 4 cylinder, 5 first spring, 6 connecting rod, 7 hook, 8 U-shaped rod, 9 third cylinder, 10 U-shaped plate, 11 threaded rod, 12 arc-shaped pull rod, 13 hanging ring, 14 pressing plate, 15 counterweight box, 16 counterweight block, 17 fixing plate, 18 mounting cover, 19 pressing plate, 20 hydraulic cylinder, 21 turntable, 22 support leg, 23 fixing ring, 24 top plate, 25 second cylinder, 26 steel wire rope, 27 rotating rod, 28 limiting strip, 29 toothed plate, 30 gear, 31 first cylinder, 32 second spring, 33 chute, 34 guide rod, 35 slider, 36 plug rod. Detailed implementation manners

[0029] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific implementations disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manners.

[0031] Referring to Figure 1-6 , an elevator steel wire rope bearing performance test device, including a base 1, a top plate 24 is fixedly connected to the base 1 through a plurality of support legs 22. Fixed rings 23 are fixed on the left and right sides and the rear bottom of the top plate 24. A steel wire rope 26 is tied to the fixed rings 23. A hook 7 is installed at the lower end of the steel wire rope 26. An installation cover 18 is also fixedly installed between the plurality of support legs 22. Three through holes for the corresponding steel wire ropes 26 to pass through are provided at the top of the installation cover 18. A turntable 21 that can move up and down and rotate forward and backward is installed in the installation cover 18. Pressing plates 19 that can move radially to press the steel wire rope 26 are installed on the left and right sides and the rear side of the turntable 21. An electric rotating seat 2 is also installed on the base 1. An arc-shaped pull rod 12 is elastically installed on the electric rotating seat 2. The hook 7 is hung on the arc-shaped pull rod 12. Two vertically arranged fixing plates 17 are fixedly connected to the front side of the electric rotating seat 2. A counterweight box 15 that can move up and down is slidably installed between the two fixing plates 17. A buffer mechanism is also installed at the top of the two fixing plates 17.

[0032] Furthermore, a rotating rod 27 is fixedly connected to the center of the turntable 21, and the upper end of the rotating rod 27 passes through the mounting cover 18. The top of the mounting cover 18 is rotatably connected to a gear 30. The gear 30 is provided with a through hole for the rotating rod 27 to pass through. A plurality of limit strips 28 are fixedly connected to the side wall of the rotating rod 27, and the inner wall of the through hole is provided with a limit groove adapted to the limit strip 28. A first cylinder 31 is installed on the top of the mounting cover 18, and the telescopic end of the first cylinder 31 is fixedly connected to a toothed plate 29 meshing with the gear 30. The setting of the limit strip 28 can enable the rotating rod 27 to move up and down, and can also drive the gear 30 to rotate.

[0033] Furthermore, a second cylinder 25 is installed on the top plate 24, and the telescopic end of the second cylinder 25 is rotatably connected to the upper end of the rotating rod 27. Starting the second cylinder 25 drives the turntable 21 to move up and down, thereby wearing out a section of the wire rope 26 located in the mounting cover 18, which is more in line with the actual wear state of the wire rope in the elevator.

[0034] Furthermore, hydraulic cylinders 20 are installed on both sides and the rear side of the turntable 21. The telescopic ends of the hydraulic cylinders 20 are fixedly connected to the corresponding extrusion plates 19. The extrusion plates 19 are arc-shaped plates, and anti-slip grooves are arranged on the outer side of the extrusion plates 19.

[0035] Furthermore, the left and right sides and the rear side of the electric rotating seat 2 are fixedly connected with a cylinder 4, and a connecting rod 6 is elastically connected to the cylinder 4 through a first spring 5. The upper end of the connecting rod 6 extends out of the cylinder 4 and is fixedly connected to the arc-shaped pull rod 12. The arc-shaped pull rod 12 is pulled up to make the hook 7 at the lower end of the wire rope 26 hang on the arc-shaped pull rod 12. Under the action of the first spring 5, the three steel wire ropes 26 are kept in a vertically tensioned state.

[0036] Furthermore, the side walls of the two fixed plates 17 are provided with a slide groove 33, and a guide rod 34 is fixedly connected in the slide groove 33. Two sliding blocks 35 slidably matched with the guide rod 34 are fixedly connected to both sides of the counterweight box 15.

[0037] Specifically, the buffer mechanism includes a support plate 14 sleeved on the guide rod 34, and a second spring 32 is sleeved on the guide rod 34 between the support plate 14 and the bottom of the slide groove 33. The end of the support plate 14 extends out of the slide groove 33. When the performance of the wire rope load is exceeded during the test, the wire rope breaks and the counterweight box 15 slides onto the support plate 14. Buffering is achieved under the action of the second spring 32 to avoid damage to the equipment.

[0038] Further, a threaded rod 11 is rotatably connected to the side wall of one of the fixing plates 17. A motor 3 capable of driving the threaded rod 11 to rotate is also installed on the fixing plate 17. A U-shaped plate 10 is threadedly connected to the threaded rod 11. A strip-shaped opening for both ends of the U-shaped plate 10 to pass through is provided on the side wall of the fixing plate 17. A docking mechanism capable of docking with the corresponding two sliders 35 is installed on the U-shaped plate 10. Start the motor 3 to drive the threaded rod 11 to rotate, and drive the counterweight box 15 to rise to the top through the U-shaped plate 10 and the slider 35.

[0039] Specifically, the docking mechanism includes a third cylinder 9 installed on the side wall of the U-shaped plate 10. The telescopic end of the third cylinder 9 is fixedly connected with a U-shaped rod 8. Both ends of the U-shaped rod 8 penetrate through the U-shaped plate 10. Docking grooves adapted to the U-shaped rod 8 are provided on the side walls of the two sliders 35 on the corresponding side. Start the third cylinder 9 to make the U-shaped rod 18 leave the docking groove of the slider 35, so that the counterweight box 15 is in a released state.

[0040] Further, a plug rod 36 is fixedly connected inside the counterweight box 15. A plurality of counterweight blocks 16 are inserted on the plug rod 36. A hanging ring 13 adapted to the hook 7 is installed on the top of the counterweight box 15. The plug rod 36 can limit the counterweight blocks 16 to prevent them from falling.

[0041] The three steel wire ropes 26 can be respectively tied to the three fixing rings 23. The steel wire ropes 26 pass through the through holes of the mounting cover 18 and hang down. Then pull up the arc-shaped pull rod 12 to make the hook 7 at the lower end of the steel wire rope 26 hang on the arc-shaped pull rod 12. Under the action of the first spring 5, the three steel wire ropes 26 are kept in a vertically tightened state. Then start the three hydraulic cylinders 20 respectively to make the extrusion plate 19 extrude the steel wire ropes 26. The telescopic degrees of the three hydraulic cylinders 20 can be respectively controlled, so as to control the extrusion force. One of the hydraulic cylinders 20 can also not be started to avoid wearing one of the steel wire ropes. Finally, start the first cylinder 31 to drive the toothed plate 29 to move left and right reciprocally, and then drive the turntable 21 to rotate forward and backward quickly through the gear 30 and the rotating rod 27, so that the extrusion plate 19 can reciprocally extrude and rub the steel wire ropes 26, so that the three steel wire ropes are in different wear states (or one of them is not worn). Start the second cylinder 25 to drive the turntable 21 to move up and down, and then the steel wire rope 26 located inside the mounting cover 18 can be worn, which is more in line with the wear state of the steel wire ropes in actual elevators and improves the test accuracy.

[0042] After wear, start the electric rotating seat 2 to drive the counterweight box 15 to rotate below the three steel wire ropes 26 in turn. The hook 7 at the lower end of the steel wire rope 26 directly hangs on the hanging ring 13 at the top of the counterweight box 15. Then add or reduce the counterweight blocks 16 in the counterweight box 15, and the static bearing capacity test of the steel wire ropes can be carried out. When performing the static test, the U-shaped rod 8 should be made to leave the docking groove so that the counterweight box 15 is in a released state.

[0043] After static testing, start the motor 3 to drive the threaded rod 11 to rotate, drive the counterweight box 15 to rise to the top through the U-shaped plate 10 and the slider 35, and then start the third cylinder 9 to make the U-shaped rod 18 leave the docking groove of the slider 35, so that the counterweight box 15 is in a released state, and the counterweight box 15 slides down naturally, instantly straightening the steel wire rope 26, and testing the tensile force value that the steel wire rope 26 can withstand instantaneously under different wear states.

[0044] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An elevator wire rope load-bearing performance testing device, comprising a base (1), characterized in that: The base (1) is fixedly connected to a top plate (24) via a plurality of supporting legs (22); a fixing ring (23) is fixed to the left and right sides and the rear bottom of the top plate (24); a steel wire rope (26) is tied to the fixing ring (23); a hook (7) is installed at the lower end of the steel wire rope (26); a mounting cover (18) is also fixedly installed between the plurality of supporting legs (22); three through holes are provided on the top of the mounting cover (18) for the corresponding steel wire ropes (26) to pass through; a turntable (21) which can move up and down and can rotate forward and reverse is installed in the mounting cover (18); The left and right sides and the rear side of the turntable (21) are both equipped with extrusion plates (19) that can move radially to extrude the steel wire rope (26); the base (1) is also equipped with an electric rotating seat (2); an arc-shaped pull rod (12) is elastically installed on the electric rotating seat (2); the hook (7) is hung on the arc-shaped pull rod (12); the front side of the electric rotating seat (2) is also fixedly connected with two vertically arranged fixed plates (17); a counterweight box (15) that can move up and down is slidably installed between the two fixed plates (17); and a buffer mechanism is also installed on the top of the two fixed plates (17).

2. The elevator wire rope load-bearing performance testing device according to claim 1, characterized in that: The center of the rotating disk (21) is fixedly connected to a rotating rod (27), the upper end of the rotating rod (27) passes through the mounting cover (18), the top of the mounting cover (18) is rotatably connected to a gear (30), the gear (30) is provided with a through hole for the rotating rod (27) to pass through, the side wall of the rotating rod (27) is fixedly connected to a plurality of limit bars (28), the inner wall of the through hole is provided with a limit groove adapted to the limit bars (28), the top of the mounting cover (18) is installed with a first cylinder (31), the telescopic end of the first cylinder (31) is fixedly connected to a toothed plate (29) meshing with the gear (30).

3. The elevator wire rope load-bearing performance testing device according to claim 2, characterized in that: A second cylinder (25) is mounted on the top plate (24), and a telescopic end of the second cylinder (25) is rotatably connected to an upper end of a rotating rod (27).

4. The elevator wire rope load-bearing performance testing device according to claim 1, characterized in that: Hydraulic cylinders (20) are installed on both sides of the left and right sides and the rear side of the rotating disk (21). The telescopic ends of the hydraulic cylinders (20) are fixedly connected to corresponding extrusion plates (19). The extrusion plates (19) are arc-shaped plates, and the outer sides of the extrusion plates (19) are provided with anti-slip grooves.

5. The elevator wire rope load-bearing performance testing device according to claim 1, characterized in that: The left and right sides and the rear side of the electric rotating seat (2) are fixedly connected to a cylinder (4), and a connecting rod (6) is elastically connected to the cylinder (4) via a first spring (5). The upper end of the connecting rod (6) extends out of the cylinder (4) and is fixedly connected to the arc-shaped pull rod (12).

6. The elevator wire rope load-bearing performance testing device according to claim 1, characterized in that: The side walls of the two fixed plates (17) are each provided with a slide groove (33), a guide rod (34) is fixedly connected in the slide groove (33), and two sliding blocks (35) slidably matched with the guide rod (34) are fixedly connected on both sides of the counterweight box (15).

7. The elevator wire rope load-bearing performance testing device according to claim 6, characterized in that: The buffer mechanism includes a pressing plate (14) sleeved on a guide rod (34), a second spring (32) is sleeved on the guide rod (34) between the pressing plate (14) and the bottom of the sliding groove (33), and the end of the pressing plate (14) extends out of the sliding groove (33).

8. The elevator wire rope load-bearing performance testing device according to claim 6, characterized in that: A threaded rod (11) is rotatably connected to the side wall of one of the fixing plates (17), a motor (3) capable of driving the threaded rod (11) to rotate is further installed on the fixing plate (17), a U-shaped plate (10) is threadedly connected to the threaded rod (11), a strip-shaped opening for the two ends of the U-shaped plate (10) to pass through is provided on the side wall of the fixing plate (17), and a docking mechanism capable of docking with the corresponding two sliders (35) is installed on the U-shaped plate (10).

9. The elevator wire rope load-bearing performance testing device according to claim 8, characterized in that: The docking mechanism includes a third cylinder (9) installed on the side wall of the U-shaped plate (10), a U-shaped rod (8) is fixedly connected to the telescopic end of the third cylinder (9), the two ends of the U-shaped rod (8) penetrate through the U-shaped plate (10), and docking grooves adapted to the U-shaped rod (8) are provided on the side walls of the two corresponding sliders (35).

10. The elevator wire rope load-bearing performance testing device according to claim 1, characterized in that: A plug rod (36) is fixedly connected inside the counterweight box (15), a plurality of counterweight blocks (16) are inserted on the plug rod (36), and a hanging ring (13) adapted to the hook (7) is installed on the top of the counterweight box (15).

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