Steel wire rope adjusting system

Abstract

A steel wire rope adjusting system comprises a pressing wheel and a linear driving mechanism, and further comprises a switch assembly which is fixed to a lift car and comprises a pressing switch, the pressing switch is provided with a key for starting the linear driving mechanism when the pressing switch is pressed down, and the switch assembly further comprises a pressing part located on the side of the key and a spring for limiting the pressing part to move relative to the key; the end, away from the key, of the pressing part is provided with a first slope. The triggering device comprises a triggering block and a transmission mechanism enabling the triggering block to obtain the speed equal to the linear speed of the traction wheel, the triggering block is provided with a second inclined face matched with the first inclined face, and therefore a wedge structure is formed by the triggering block and the pressing component; when the steel wire rope slips, the trigger block and the pressing part move relatively in the vertical direction, the pressing part presses the key through the relative movement, and therefore the linear driving mechanism is started to drive the pressing wheel to extrude the steel wire rope. When the elevator slips, dynamic adjustment of the steel wire rope is achieved by controlling the linear driving mechanism through a mechanical structure, and faults are low during adjustment.

Description

Technical Field

[0001] The invention relates to a steel wire rope adjustment system and belongs to the technical field of elevator lifting. Background Art

[0002] In the elevator lifting system, the occurrence of car falling accidents should be avoided as much as possible to prevent a great impact on the passengers in the car. The car falling is mainly caused by the friction between the wire rope and the traction sheave decreasing, causing the wire rope to slip.

[0003] Chinese patent application number 201410117973.3 describes an adjustment wheel that increases the wire rope wrap angle, thereby reducing wire rope slippage. The adjustment wheel compresses the wire rope under the drive of a linear drive mechanism to adjust the wire rope wrap angle. Currently, some elevators utilize an electrical system. When the wire rope slips, a sensor generates a signal that is sent to a host computer, which then issues a control signal to activate the linear drive mechanism, thereby achieving dynamic adjustment when the wire rope slips. However, electrical systems are prone to malfunction, resulting in delayed or even no adjustment of the adjustment wheel. Summary of the Invention

[0004] In response to the deficiencies in the prior art, the present application provides a wire rope adjustment system that achieves dynamic adjustment of the wire rope by controlling the linear drive mechanism through a mechanical structure when the elevator slips, with low failure rate during adjustment.

[0005] A wire rope adjustment system for an elevator comprises a pressure wheel, a linear drive mechanism, and further comprises: A switch assembly is fixed to the car and includes a push switch, wherein the push switch has a button for activating the linear drive mechanism when pressed, and the switch assembly further includes a pressing component located on the side of the button, a spring for limiting the movement of the pressing component relative to the button, and an inclined surface 1 is provided on the end of the pressing component away from the button; The trigger device includes a trigger block and a transmission mechanism. The transmission mechanism enables the trigger block to obtain a speed equal to the linear speed of the traction wheel. Thus, when the wire rope is not slipping, the trigger block is stationary relative to the pressing component. The trigger block is provided with a second inclined surface that matches the first inclined surface, thereby forming an inclined wedge structure with the pressing component. When the wire rope slips, the trigger block and the pressing component form relative movement in the vertical direction. The relative movement causes the pressing component to move toward the key to press the key, thereby starting the linear drive mechanism to drive the pressure wheel to squeeze the wire rope wound around the traction wheel.

[0006] Preferably, the transmission mechanism includes a running belt, an upper pulley and a lower pulley for installing the running belt, the running belt has a vertical section located on the side of the pressing component and used to fix the trigger block, the axle of the upper pulley and the axle of the traction wheel are connected by a transmission assembly with a transmission ratio of 1:1, and the diameter of the upper pulley is equal to the diameter of the traction wheel.

[0007] Preferably, the transmission assembly includes a gear 1 arranged on the axle of the traction wheel and a gear 2 arranged on the axle of the upper pulley, and the gear 2 is meshed with the gear 1.

[0008] Preferably, the transmission assembly comprises a coupling connecting the axle of the traction wheel and the axle of the upper pulley.

[0009] Preferably, the upper pulley is offset in the horizontal direction relative to the lower pulley toward the traction sheave, and the running belt is further provided with a plurality of redirecting pulleys for forming the vertical section.

[0010] Preferably, the steel wire rope includes a car side rope body and a counterweight side rope body, and the pressure wheel is arranged at the counterweight side rope body.

[0011] Preferably, the linear drive mechanism includes a cylinder and a solenoid valve for controlling the cylinder; the push switch is connected to the electromagnetic coil of the solenoid valve and the power supply for powering the electromagnetic coil through wires, and the wires are arranged in the drag chain, the upper end of the drag chain is fixed in the machine room, and the lower end of the drag chain is fixed on the car.

[0012] Preferably, a guide rail for guiding the trigger block is provided on the outer side of the pressing component, and the guide rail is connected to the car through a guide rail frame.

[0013] Preferably, the trigger block comprises a first half block and a second half block provided on the limit slide rod, wherein the first half block and the second half block are respectively formed with a half groove, and the two half grooves constitute a fixing groove for fixing on the wire rope, and the first half block and the second half block are connected by a tension spring; The portion of the guide rail located above the trigger block is provided with an expansion piece for expanding the space between the first half block and the second half block.

[0014] In summary, the present invention has the following beneficial effects: 1. The traction wire rope adjustment system of the present invention is provided with structures such as a switch assembly and a trigger device that interact with each other. When the wire rope slips, the relative movement generated between the trigger block in the trigger device and the pressing component in the switch assembly causes the pressing component to press a button on the push switch, thereby activating the linear drive mechanism, allowing the pressure wheel to dynamically adjust the wire rope wrap angle. This replaces the means of controlling the linear drive mechanism by the electrical system in the prior art. Compared with the prior art, the present invention uses mechanical structure control to avoid abnormal phenomena such as program errors, component aging, signal interference, and sensor detection failures that are prone to electrical components in the electrical system. It has the advantages of reliable and stable control and low failure rate.

[0015] The traction wire rope adjustment system of the present invention, when the wire rope wrap angle increases and secondary slip occurs during the operation of the elevator, the trigger block falls with the car when the car falls, and the height difference between the trigger block and the car can be controlled within a small range. In the later stage, workers are allowed to stand directly on the top of the car to reset the trigger block. At the same time, the trigger block falls with the car when the car falls, avoiding serious accidents such as the trigger block colliding with the machine room. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a layout diagram of the traction wire rope adjustment system in Example 1; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 This is a layout diagram of the traction wire rope adjustment system in Example 2 after the wire rope wrap angle is changed; Figure 4 for Figure 3 Layout diagram of the trigger block and expansion piece; Figure 5 for Figure 3 Top view of the actuator in . DETAILED DESCRIPTION

[0017] The present invention will be further described below through specific embodiments with reference to the accompanying drawings.

[0018] Example 1: A wire rope adjustment system for lifting elevators, such as Figure 1-2As shown, it includes a pressure wheel 1 and a linear drive mechanism 2 for driving the pressure wheel 1. The linear drive mechanism 2 adopts the most common cylinder 21. The pressure wheel 1 is fixed to the cylinder 21. The cylinder 21 is equipped with a solenoid valve 22 for controlling the activation of the cylinder 21. When the solenoid valve 22 is energized, the cylinder 21 is activated, so that the pressure wheel 12 on it squeezes the wire rope 02 wrapped around the traction sheave 01, thereby increasing the wrap angle of the wire rope 02. The wire rope 02 is structurally composed of a car side rope body and a counterweight side rope body, and the pressure wheel 1 is set at the counterweight side rope body. These can all be considered as existing technologies and will not be described in detail here.

[0019] The system of the present invention further includes a switch component 3 and a trigger device 4.

[0020] The switch assembly 3 is fixed on the car 03, preferably set on the car top for easy installation. The switch assembly 3 includes a push switch 31. The push switch 31 is connected to the electromagnetic coil of the electromagnetic valve 22 and the power supply through the wire 6. The push switch 31 has a button 311. When the button 311 is pressed, the electromagnetic coil and the power supply are connected, thereby energizing the electromagnetic valve 22 and starting the above-mentioned linear drive mechanism 2. The switch assembly 3 also includes a pressing component 32 located on the side of the button 311. The pressing component 32 is slidably set on a fixed frame 30 connected to the car top 03. The fixing frame 30 can be assembled from profiles as long as the sliding performance of the pressing component 32 is met. The fixing frame 30 is connected to a spring 33 at the part close to the car 03. The pressing component 32 is also provided with a spring connecting portion 320. The other end of the spring 33 is connected to the spring connecting portion 320, thereby limiting the movement of the pressing component 32 relative to the button 311 when the elevator is operating normally, that is, when the wire rope is not slipping, to prevent the button 311 from being pressed. The end of the pressing component 32 away from the button 311 is provided with an inclined surface 321, and the inclined surface 321 is inclined from bottom to top in the direction away from the car.

[0021] The trigger device 4 includes a trigger block 45 and a transmission mechanism. The trigger block 45 has a second inclined surface 451 that matches the first inclined surface 321. The second inclined surface 451 is parallel to the first inclined surface 321, so that the trigger block 45 and the pressing component 32 form an inclined wedge structure. The transmission mechanism specifically includes a running belt 41, an upper pulley 42 and a lower pulley 43 for installing the running belt 41, the upper pulley 42 is arranged in the machine room 04, and the lower pulley 43 is arranged in the bottom pit 05 of the shaft. The running belt 41 is tightened as much as possible, and the running belt 41 has a vertical section located on the side of the pressing component 32. The trigger block 45 is fixedly installed on the vertical section. The axle of the upper pulley 42 and the axle of the traction wheel 01 are connected through a transmission component 44 with a transmission ratio of 1:1, and the diameter of the upper pulley 42 is equal to the diameter of the traction wheel 01. The transmission component 44 specifically includes a gear 1 441 arranged on the axle of the traction wheel 01 and a gear 2 442 arranged on the axle of the upper pulley 42. , gear 2 442 is meshed with gear 1 441. Under the conditions that the transmission assembly 44 has a transmission ratio of 1:1 and the diameter of the upper pulley 42 is equal to the diameter of the traction sheave 01, the trigger block 45 can obtain a speed equal to the linear speed of the traction sheave. In this way, when the elevator is operating normally or the wire is not slipping (that is, the linear speed of the traction sheave 01 is equal to the speed of the car 03), the trigger block 45 and the pressing component 32 on the car 03 are relatively stationary, and the trigger block 45 does not affect the operation of the car 03. Of course, in other embodiments, the transmission assembly 44 can also be a coupling connecting the axle of the traction sheave 01 and the axle of the upper pulley 42. The coupling is not shown in the accompanying drawings.

[0022] The working principle is as follows: when the elevator goes up and the wire slips, the car 03 starts to slow down due to the lack of effective traction from the traction sheave 01, and the pressing component 32 drops as the speed of the car 03 decreases. At this time, the trigger block 45 moves upward relative to the pressing component 32, and the second inclined surface 451 squeezes the first inclined surface 321, causing the pressing component 32 to move and squeeze the button 311, thereby turning on the press switch 31, thereby energizing the solenoid valve 22 to start the linear drive mechanism, so that the pressure wheel 1 dynamically adjusts the wire rope wrap angle, replacing the conventional method of controlling the linear drive mechanism by the electrical system. In the electrical system, electrical components are prone to abnormal phenomena such as program errors, component aging, signal interference, and sensor detection failures, which may lead to untimely or even no adjustment of the adjustment wheel. The present invention uses mechanical structure control to avoid abnormal phenomena such as program errors, component aging, signal interference, and sensor detection failures that are prone to occur in electrical components in the electrical system. It has the advantages of reliable and stable control and low failure rate. Similarly, when the elevator goes down and the wire rope slips, the speed of the car 03 increases, and the speed of the pressing component 32 also increases accordingly. The pressing component 32 moves downward relative to the trigger block 45 and squeezes the button 311, so that the press switch 31 is turned on, thereby energizing the solenoid valve 22 to start the linear drive mechanism.

[0023] In the present invention, the upper pulley 42 is offset in the horizontal direction relative to the lower pulley 43 toward the traction sheave 01, so that the upper pulley 42 in the machine room 04 is closer to the traction sheave 01. As a result, the gear 2 442 and the gear 1 441 are smaller in size design, which is beneficial to the arrangement of the gear 2 442, the gear 1 441 and the upper pulley 42 in the machine room 04. When there is a relative offset between the upper pulley 42 and the lower pulley 43, the running belt 41 is also provided with a plurality of redirecting pulleys 46 for forming a vertical section.

[0024] The electric wire 6 is set in the drag chain 5. The upper end of the drag chain 5 can be fixed in the machine room 04 through a fixed plate and other structures, and the lower end of the drag chain 5 is fixed to the bottom of the car 03 to prevent the electric wire 6 from causing interference such as entanglement when the car 03 is raised or lowered.

[0025] A guide rail 61 is provided on the outside of the pressing component 32. The guide rail 61 is vertically arranged. The trigger block 45 is slidably arranged on the guide rail 61. It specifically has a sliding portion 450 that is stuck in the sliding groove of the guide rail 61. The guide rail 61 is used to guide the trigger block 45 to ensure that its movement direction is vertical. The guide rail 61 is connected to the car 03 through the guide rail frame 62. The structural form of the guide rail frame 62 is not limited and can be assembled from profile parts.

[0026] Example 2: After the wire rope wrap angle increases, at this time, see Figure 3 As shown, the second slope 451 is above the first slope 321. Of course, it is not ruled out that the wire rope 02 may slip a second time. During the subsequent use of the elevator, no matter whether the elevator is in the upward or downward state, once the wire rope 02 slips for the second time, the car speed, which was originally equal to the speed of the trigger block 45, changes, and relative movement occurs between the trigger block 45 and the car 03. Therefore, after the car 03 falls due to the slip of the wire rope 02, there is often a large height difference between the trigger block 45 and the car 03, which makes it difficult for workers to stand directly on the top of the car to reset the trigger block 45. The conventional operation is often to first determine the position of the trigger block 45, and then move the car through the winch to the height of the trigger block 45. Resetting is relatively cumbersome. What's more, when the elevator goes up to the top floor, if the wire rope suddenly slips and causes the elevator to fall, and before the traction machine brake makes the elevator stop suddenly, the trigger block 45 still moves upward with the rotation of the traction wheel 01, and a serious accident of colliding with the machine room is very likely to occur.

[0027] Example 2, based on the above problems, is a further improvement on Example 1.

[0028] like Figure 3-5As shown, the trigger block 45 includes half block one 453 and half block two 454, and half block one 453 and half block two 454 are arranged on multiple limit slides 452. The end of the limit slide 452 has a limit portion 4521 for preventing half block one 453 and half block two 454 from sliding off the limit slide 452. Half grooves 453 are formed on half block one 453 and half block two 454 respectively, and the two half grooves constitute a fixed groove for fixing on the wire rope 02. The fixed groove is fixed on the wire rope 02 specifically by the friction between the fixed groove and the wire rope 02. The half block one 453 and the half block two 454 are connected by a tension spring 455. The tension spring 455 provides elastic force to make the half block one 453 and the half block two 454 tend to approach each other, so that the fixed groove is fixed on the wire rope 02. An expansion member 63 is provided at the portion of the guide rail 61 located above the trigger block 45. The expansion member 63 is opposite to the space between the first half block 453 and the second half block 454 and has two oppositely arranged oblique expansion surfaces 631. The oblique expansion surfaces 631 expand outward as they move away from the lower portion of the expansion member 63. The expansion member 63 also has a retaining surface 632 connected to the top of the oblique expansion surface 631, and the retaining surface 632 is vertical.

[0029] In the present invention, after the wire rope wrap angle increases and a secondary slip occurs during elevator operation, relative movement occurs between the trigger block 45 and the car, so that the trigger block 45 and the expander 63 approach each other, and the expander 63 is inserted into the space between the half block 1 453 and the half block 2 454. As the expander 63 continues to be inserted, the two oblique expansion surfaces 631 push the trigger block 45 to both sides, so that the connection between the fixing groove and the wire rope is disconnected. Finally, the expander 63 moves to the retaining surface 632 to keep the trigger block 45 in the expanded state, that is, the trigger block 45 is finally restrained on the expander 63 by the retaining surface 632. When the car falls, the trigger block 45 falls with the car, and the height difference between the trigger block 45 and the car is controlled within a small range. In the later stage, a worker is allowed to stand directly on the car roof to reset the trigger block 45. At the same time, when the car falls, the trigger block 45 falls with the car, avoiding a serious accident of the trigger block 45 colliding with the machine room.

[0030] The above embodiments are merely descriptions of preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Any modifications and improvements made to the technical solution of the present invention by a person of ordinary skill in the art without departing from the design concept of the present invention shall fall within the scope of protection of the present invention. The technical content for which protection is sought in the present invention is fully set forth in the claims.

Claims

1. A wire rope adjustment system for an elevator, comprising a pressure wheel (1) and a linear drive mechanism (2), characterized in that: Also includes: A switch assembly (3) is fixed on the car (03) and includes a push switch (31). The push switch (31) has a button (311) for activating the linear drive mechanism (2) when pressed. The switch assembly (3) further includes a push component (32) located on the side of the button (311), a spring (33) for limiting the movement of the push component (32) relative to the button (311), and an inclined surface (321) is provided at the end of the push component (32) away from the button (311). The trigger device (4) comprises a trigger block (45) and a transmission mechanism, wherein the transmission mechanism enables the trigger block (45) to obtain a speed equal to the linear speed of the traction wheel, so that the trigger block (45) is stationary relative to the pressing component (32) when the wire rope (02) does not slip, and the trigger block (45) is provided with a second inclined surface (451) matched with the first inclined surface (321), thereby forming an inclined wedge structure with the pressing component (32); when the wire rope (02) slips, the trigger block (45) and the pressing component (32) form a relative motion in the vertical direction, and the relative motion causes the pressing component (32) to move toward the button (311) to press the button (311), thereby starting the linear drive mechanism (2) to drive the pressing wheel (1) to squeeze the wire rope (02) wound on the traction wheel (01).

2. A wire rope adjustment system according to claim 1, characterized in that: The transmission mechanism comprises a running belt (41), an upper pulley (42) and a lower pulley (43) for mounting the running belt (41); the running belt (41) has a vertical section located on the side of the pressing component (32) and used for fixedly connecting the trigger block (45); the axle of the upper pulley (42) and the axle of the traction wheel (01) are connected to each other through a transmission assembly (44) with a transmission ratio of 1:1, and the diameter of the upper pulley (42) is equal to the diameter of the traction wheel (01).

3. A wire rope adjustment system according to claim 2, characterized in that: The transmission assembly (44) includes a gear 1 (441) arranged on the axle of the traction wheel (01) and a gear 2 (442) arranged on the axle of the upper pulley (42), and the gear 2 (442) is meshed with the gear 1 (441).

4. A wire rope adjustment system according to claim 2, characterized in that: The transmission assembly (44) includes a coupling connecting the axle of the traction wheel (01) and the axle of the upper pulley (42).

5. A wire rope adjustment system according to claim 3 or 4, characterized in that: The upper pulley (42) is offset in the horizontal direction relative to the lower pulley (43) toward the traction wheel (01), and the running belt (41) is also provided with a plurality of redirecting wheels (46) for forming the vertical section.

6. The wire rope adjustment system according to claim 1, characterized in that: The steel wire rope (02) comprises a car side rope body and a counterweight side rope body, and the pressure wheel (1) is arranged at the counterweight side rope body.

7. The wire rope adjustment system according to claim 1, characterized in that: The linear drive mechanism (2) includes a cylinder (21) and a solenoid valve (22) for controlling the cylinder (21); the push switch (31) is connected to the electromagnetic coil of the solenoid valve (22) and a power supply for supplying power to the electromagnetic coil via an electric wire (6); the electric wire (6) is arranged in a drag chain (5), the upper end of the drag chain (5) is fixed in a machine room, and the lower end of the drag chain (5) is fixed on the car (03).

8. The wire rope adjustment system according to claim 1, characterized in that: A guide rail (61) for guiding the trigger block (45) is provided on the outside of the pressing component (32), and the guide rail (61) is connected to the car (03) via a guide rail frame (62).

9. The wire rope adjustment system according to claim 8, characterized in that: The trigger block (45) comprises a half block one (453) and a half block two (454) arranged on a limit slide bar (452), half grooves are formed on the half block one (453) and the half block two (454), respectively, and the two half grooves form a fixing groove for fixing on the wire rope (02), and the half block one (453) and the half block two (454) are connected by a tension spring (455); The guide rail (61) is provided with an expansion piece (63) at a portion located above the trigger block (45) for expanding the space between the first half block (453) and the second half block (454).

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