Elevator car ascending and descending overspeed and car accidental movement protection braking system
The encoder detects speed abnormalities and controls the electronic top pressure assembly to clamp the steel rope, which solves the safety hazards of elevator car overspeed or unexpected movement, achieves a reliable braking effect, and improves the safety and maintenance convenience of the elevator.
Patent Information
- Application Number
- CN202510802548.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2025-08-15
AI Technical Summary
When the traction brake or speed limiter fails, the existing elevators lack effective protective braking when the car is upward or downward, or accidentally moves, resulting in safety hazards and equipment damage.
A protective braking system for overspeeding up and downward elevator car and accidental movement of the car is designed. The encoder detects speed abnormality, and the controller controls the electronic top pressure assembly to make the multi-link wedge clamping rope clamp the steel rope to achieve braking.
When the car is overspeeded or accidentally moved, it can effectively brake to improve the safety performance and reliability of the elevator, with a simple structure and convenient maintenance.
Smart Images
Figure CN120482867A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of elevators, in particular to a braking system for protecting an elevator car from overspeeding and accidental movement of the car when the car goes up or down. Background Art
[0002] Traction elevators have hundreds of mechanical and electrical functions, including safety features, incorporated into their structure. During use, elevator-related accidents can occasionally cause injuries or fatalities, such as overspeeding or unexpected movement of the elevator car while ascending or descending. Overspeeding refers specifically to the situation where the elevator car loses control, passes over the limit switches, and overspeeds, impacting the top or bottom of the shaft. Unexpected movement refers specifically to abnormal movement of the car caused by an elevator malfunction or human error, such as after the elevator stops at a landing.
[0003] However, in the above-mentioned elevator failure situation, although the traction elevator is equipped with a traction machine brake or speed limiter, when the traction machine brake or speed limiter fails due to the fault, the elevator car does not receive further protective braking action when it exceeds the speed limit or moves unexpectedly when traveling upward or downward, thereby causing damage to the equipment or personal safety issues. As a result, the elevator still has a great safety hazard, resulting in a decrease in the safety value of the elevator. Summary of the Invention
[0004] In order to overcome the defects of the prior art, the present invention provides an elevator car overspeed and car accidental movement protection braking system to solve the above and related problems.
[0005] The technical solution adopted by the present invention to solve the technical problem is: a braking system for protecting an elevator car from overspeeding and accidental movement in both the up and down directions, comprising a hoistway, a machine room provided on the hoistway, a car provided in the hoistway, a drive main unit, a guide wheel, and a controller provided in the machine room, a traction sheave mounted on the output shaft of the drive main unit, a first steel rope wound around the traction sheave and the guide wheel, one end of the first steel rope being connected to the car, and the other end being connected to a counterweight frame; One side of the car is connected to a speed governor via a second steel rope, an encoder is mounted on the shaft of the speed governor, and a multi-link wedge-clamping rope clamp is also mounted on the first steel rope, the multi-link wedge-clamping rope clamp comprises a first clamping block assembly and a second clamping block assembly located on both sides of the first steel rope on one side of the traction sheave, first sliders are provided on both sides above the first clamping block assembly and the second clamping block assembly, and second sliders are provided on both sides below the first clamping block assembly and the second clamping block assembly, the side surfaces of the first clamping block assembly, the second clamping block assembly, the first slider and the second slider are hinged to each other via four links, and an electronic top pressure assembly installed in the hoistway machine room is provided on the side of the first clamping block assembly away from the first steel rope; The electronic top-pressing assembly and the encoder are both communicatively connected to the controller. When the encoder detects abnormal speed or unexpected movement of the car, the encoder feeds back a signal to the controller, which then sends an action signal to the electronic top-pressing assembly. The electronic top-pressing assembly presses the first clamping block assembly, causing the first clamping block assembly and the second clamping block assembly to move toward each other through a four-bar linkage and clamp the first steel rope.
[0006] The beneficial effect of the present invention is that when the car runs at an abnormal speed or moves unexpectedly, the second steel rope drives the speed limiter to rotate, so that the encoder on the speed limiter can detect the speed exceeding the range or the unexpected movement, and the electronic top pressure assembly can be controlled by the controller to press the first clamping block assembly, so that the first clamping block assembly and the second clamping block assembly clamp the first steel rope in opposite directions through the linkage of the four-bar linkage, thereby braking the car and preventing the car from moving further rapidly after the traction machine brake or speed limiter fails, thereby improving the protection and safety performance of the elevator; the structure is reliable and easy to maintain. Among them, the abnormal running speed or unexpected movement of the car refers to the car's up and down speed overspeed and unexpected movement of the car.
[0007] Furthermore, the first clamping block assembly and the second clamping block assembly can be movably mounted on a rope clamp support, the rope clamp support is mounted on a load-bearing beam of a shaft machine room, the electronic top pressure assembly is an electromagnetic valve, the electromagnetic valve is mounted on the rope clamp support, and the electromagnetic valve has a moving contact at one end close to the first clamping block assembly, and the moving contact is in contact with the side surface of the first clamping block assembly.
[0008] After adopting the above-mentioned further structure, the first clamping block assembly can be pressed by the electromagnetic valve, so that the first clamping block assembly and the second clamping block assembly can move synchronously in opposite directions through the linkage of the four-bar linkage, and the structure is stable and reliable.
[0009] Furthermore, the first clamping block assembly includes a wedge block and a pressure block, and a first guide groove is provided on the inner wall of the rope clamp support close to the pressure block, the pressure block is located in the first guide groove, and an embedding groove is provided on the side of the pressure block close to the wedge block, and a first embedding block hinged to one side of the four-link is provided on the side of the wedge block close to the embedding groove, and an upper and lower symmetrical inclined surface is provided on the side of the wedge block close to the first steel rope, and a spacer is provided between the upper and lower symmetrical inclined surfaces, and the inclination angle depth of the inclined surface gradually deepens toward the spacer block. Rollers are provided on the upper and lower sides of the spacer block, and the roller includes at least two cylinders, and at least two of the cylinders are connected by an axis core, and tension spring mounting grooves are provided at both ends of the axis core, and a third tension spring is connected in the tension spring mounting grooves at both ends, and the other end of the third tension spring is connected to the end face of the first embedding block.
[0010] After adopting the above-mentioned further structure, since the rollers are located on the upper and lower side positions of the spacer and on the upper and lower symmetrical inclined planes, when the upward speed of the car exceeds the speed limit or moves accidentally, the first steel rope moves upward quickly, and when the first clamping block assembly and the second clamping block assembly move in opposite directions, the upper and lower rollers contact the first steel rope, and the contact becomes tighter and tighter until the friction force drives the roller on the upper side of the spacer to move upward through the elastic action of the third tension spring, and the movement direction is toward the inclined plane away from the spacer, so that the roller and the second clamping block assembly clamp the first steel rope at the same time, causing the car to slow down and stop quickly; similarly, when the downward speed of the car exceeds the speed limit or moves accidentally, the roller on the lower side of the spacer and the second clamping block assembly clamp the first steel rope at the same time, and the overall reliability is higher.
[0011] Furthermore, a first tension spring is installed on a side of the pressing block away from the wedge block, and an end of the first tension spring away from the pressing block is installed at the end of the first guide groove.
[0012] With the above-mentioned further structure, the pressing block can move under the top pressure of the electromagnetic valve. At the same time, after the electromagnetic valve is reset, the pressing block can be reset under the action of the first tension spring to cancel the clamping state of the first steel rope.
[0013] Furthermore, the second clamping block assembly includes a movable plate and a second embedded block, a second guide groove is provided on the inner wall of the rope clamp support close to the movable plate, the second embedded block is embedded and installed in the second guide groove, the other side of the four-link is hingedly installed on the second embedded block, a second tension spring is installed on the side of the second embedded block away from the movable plate, and the second tension spring is installed on the end of the second guide groove on the side away from the second embedded block.
[0014] After adopting the above-mentioned further structure, during the movement of the wedge block, the second embedded block can be driven to move in the second guide groove through the four-link rod. The movement process is more stable and smooth, and the safety and reliability are improved. During reset, the second tension spring pulls the second embedded block to reset, and at the same time, the wedge block is driven to reset through the four-link rod.
[0015] Furthermore, the first slider and the second slider are respectively installed on the rope clamp support through slide rails.
[0016] After adopting the above-mentioned further structure, during the movement of the four-bar linkage, the first slider and the second slider move on the slide rail, thereby improving the smoothness of the entire structure and thus improving reliability.
[0017] Furthermore, a switch top plate is provided at the lower end of the second slider, and an electrical switch for mounting the rope clamp support is provided below the switch top plate. After adopting the above-mentioned further structure, after the solenoid valve is triggered, the four-linkage moves in opposite directions driven by the wedge block and the movable plate, so that the first slider and the second slider move away from each other in the longitudinal direction until the switch top plate touches the in-position electrical switch, so as to verify through the in-position electrical switch that the elevator car overspeed and car accidental movement protection brake system has been activated.
[0018] Furthermore, a pressure sensor is installed on the moving contact of the solenoid valve. When the pressure sensor moves, a pressure threshold is generated. The pressure threshold is used to verify whether the moving contact on the solenoid valve has moved into position, and then confirm whether the clamping force generated by the multi-link wedge-clamping rope clamp to clamp the first steel rope meets the design requirement value, ensuring that the car is effectively stopped or decelerated to a stop. The in-position electrical switch is communicatively connected to the controller so that the controller detects that the second slider has moved to a specified position, thereby determining that the four-bar linkage has reached its position, that is, the braking system for protecting the elevator car from overspeeding and accidental movement in the up and down directions has issued a brake in-position signal to the car.
[0019] After adopting the above-mentioned further structure, it is convenient for maintenance personnel or installers to adjust the pressure of the solenoid valve through the data of the pressure sensor, so that the electrical switch in place can detect whether the elevator car overspeeds and accidental movement protection braking system has made reliable braking action on the car.
[0020] Furthermore, an encoder is installed on the speed limiter shaft, which serves as a trigger device for the rope clamp. When the car running speed is abnormal or moves unexpectedly, the trigger device detects the car overspeeding or unexpected movement in the upward or downward directions, and activates the moving contact on the solenoid valve in the multi-link wedge clamping rope clamp through the controller to ensure that the car is effectively stopped or decelerated to a stop.
[0021] Furthermore, it also includes a communication module and an elevator remote safety ecological monitoring terminal, and the communication module is electrically connected to the controller, the encoder on the speed limiter shaft, the in-position electrical switch and the elevator remote safety ecological monitoring terminal respectively; the communication module is a 5G communicator, and the elevator remote safety ecological monitoring terminal is a mobile phone or a computer.
[0022] After adopting the above-mentioned further structure, the data of the controller can be transmitted through the communication module and displayed or alerted through the elevator remote safety ecological monitoring terminal. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 The present invention is a schematic structural diagram of the elevator car up and down overspeed and car accidental movement protection braking system.
[0024] Figure 2 This is a schematic structural diagram of the connection diagram of the first clamping block assembly and the second clamping block assembly.
[0025] Figure 3 It is a schematic diagram of the cross-sectional structure of the drum.
[0026] Figure 4 Schematic diagram of the structure of the moving contact of the solenoid valve.
[0027] Figure 5 This is a control flow chart of the elevator car up and down overspeed and car accidental movement protection braking system of the present invention.
[0028] In the figure: hoistway 1, controller 2, drive main unit 3, guide wheel 4, first steel rope 5, car 6, counterweight 7, multi-link wedge clamping rope clamp 8, first clamping block assembly 9, second clamping block assembly 10, wedge 11, pressure block 12, solenoid valve 13, movable plate 14, second embedded block 15, first slider 16, second slider 17, four-link 18, first guide groove 19, first tension spring 20, second guide groove 21, second tension spring 22, embedded groove 23, first embedded block 24, inclined surface 25, roller 26, third tension spring 27, switch top plate 28, said switch top plate 28, in-position electrical switch 29, shaft core 30, tension spring mounting groove 31, speed limiter 32, rope clamp support 33, pressure sensor 34, machine room load-bearing beam 35. DETAILED DESCRIPTION
[0029] The following is a further description of specific embodiments of the present invention in conjunction with the accompanying drawings. It should be noted that the description of these embodiments is intended to facilitate understanding of the present invention and does not constitute a limitation of the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
[0030] Combine Figures 1 to 5The elevator car up and down overspeed and car accidental movement protection braking system shown in the figure has a shaft 1, a machine room is set on the shaft 1, a car 6 is set in the shaft 1, a driving host 3, a guide wheel 4 and a controller 2 are set in the machine room, the output shaft of the driving host 3 is installed with a traction wheel, the traction wheel and the guide wheel 4 are wound with a first steel rope 5, one end of the first steel rope 5 is connected to the car 6, and the other end is connected to the counterweight frame 7; one side of the car 6 is connected to the speed limiter 32 through the second steel rope, the shaft of the speed limiter 32 is installed with an encoder, and the first steel rope 5 is also wound around the traction wheel and the guide wheel 4. The multi-link wedge clamping rope clamp 8 is installed. The multi-link wedge clamping rope clamp 8 includes a first clamping block assembly 9 and a second clamping block assembly 10 on both sides of the first steel rope 5 on one side of the traction wheel. A first slider 16 is provided on both sides above the first clamping block assembly 9 and the second clamping block assembly 10, and a second slider 17 is provided on both sides below. The sides of the first clamping block assembly 9, the second clamping block assembly 10, the first slider 16 and the second slider 17 are hinged to each other through a four-link 18. The side of the first clamping block assembly 9 away from the first steel rope 5 is provided with a An electronic top pressure assembly in the machine room of the hoistway 1; the electronic top pressure assembly and the encoder are both communicatively connected to the controller 2. When the encoder detects that the car 6 is running at an abnormal speed or moves unexpectedly, the encoder feeds back a signal to the controller 2, which sends an action signal to the electronic top pressure assembly through the controller 2. The electronic top pressure assembly presses the first clamping block assembly 9, causing the first clamping block assembly 9 and the second clamping block assembly 10 to move toward each other through the four-link 18 and clamp the first steel rope 5. In this embodiment, when the car is running at an abnormal speed or moves unexpectedly, the second steel rope drives the speed governor 32 to rotate, so that the encoder on the speed governor can detect that the speed is out of range or moves unexpectedly, so that the electronic top pressure assembly can be controlled by the controller 2, so that the electronic top pressure assembly presses the first clamping block assembly 9, causing the first clamping block assembly 9 and the second clamping block assembly 10 to clamp the first steel rope 5 toward each other through the linkage of the four-link 18, thereby braking the car 6 to prevent the car 6 from moving further rapidly after the speed governor 32 fails, thereby improving the protection and safety performance of the elevator. Its structure is reliable and easy to maintain. The abnormal running speed or unexpected movement of the car 6 refers to the up and down overspeed of the car 6 or the unexpected movement of the car.
[0031] In this embodiment, the first clamping block assembly 9 and the second clamping block assembly 10 are both movably mounted on the rope clamp support 33, which is mounted on the load-bearing beam 35 of the machine room of the shaft 1. The electronic pressure assembly is a solenoid valve 13, which is mounted on the rope clamp support 33. The solenoid valve 13 has a moving contact at one end close to the first clamping block assembly 9, and the moving contact is in contact with the side surface of the first clamping block assembly 9. The first clamping block assembly 9 can be pressed by the solenoid valve 13, so that the first clamping block assembly 9 and the second clamping block assembly 10 can move synchronously in opposite directions under the linkage of the four-link 18, and its structure is stable and reliable.
[0032] The first clamping block assembly 9 of this embodiment includes a wedge block 11 and a pressure block 12. A first guide groove 19 is provided on the inner wall of the rope clamp support 33 near the pressure block 12. The pressure block 12 is located in the first guide groove 19. An embedding groove 23 is provided on the side of the pressure block 12 near the wedge block 11. A first embedding block 24 hinged to one side of the four-link 18 is provided on the side of the wedge block 11 near the embedding groove 23. A side of the wedge block 11 near the first steel rope 5 is provided with upper and lower symmetrical inclined surfaces 25. A spacer is provided between the upper and lower symmetrical inclined surfaces 25. The inclination angle depth of the inclined surface 25 gradually deepens toward the spacer block. Rollers 26 are provided on the upper and lower sides of the spacer. The roller 26 includes at least two cylinders. At least two cylinders 18 are connected by an axis core 30. Tension spring mounting grooves 31 are provided at both ends of the axis core 30. The tension spring mounting grooves 31 at both ends are connected with a third tension spring 27. The other end is connected to the end face of the first embedded block 24; since the roller 26 is located on the upper and lower side positions of the spacer and on the upper and lower symmetrical inclined surfaces 25, when the car 6 exceeds the speed or moves accidentally, the first steel rope 5 moves upward quickly. When the first clamping block assembly 9 and the second clamping block assembly 10 move in opposite directions, the upper and lower rollers 26 contact the first steel rope 5, and the contact becomes tighter and tighter until the friction force drives the roller 26 on the upper side of the spacer to move upward through the elastic action of the third tension spring 27, and the moving direction is toward the inclined surface 25 away from the spacer, so that the roller 26 and the second clamping block assembly 10 clamp the first steel rope 5 at the same time, causing the car 6 to slow down and stop quickly; similarly, when the car 6 exceeds the speed or moves accidentally, the roller 26 on the lower side of the spacer and the second clamping block assembly 10 clamp the first steel rope 5 at the same time, and the overall reliability is higher.
[0033] In this embodiment, a first tension spring 20 is installed on the side of the pressure block 12 away from the wedge block 11, and the end of the first tension spring 20 away from the pressure block 12 is installed at the end of the first guide groove 19; so that the pressure block 12 can move under the top pressure of the solenoid valve 13, and at the same time, after the solenoid valve 13 is reset, the pressure block can be reset under the action of the first tension spring 20, so as to cancel the clamping state of the first steel rope 5.
[0034] The second clamping block assembly 10 of this embodiment includes a movable plate 14 and a second embedded block 15. A second guide groove 21 is provided on the inner wall of the rope clamp support 33 on the side close to the movable plate 14. The second embedded block 15 is embedded and installed in the second guide groove 21. The other side of the four-link 18 is hingedly installed on the second embedded block 15. A second tension spring 22 is installed on the side of the second embedded block 15 away from the movable plate 14. The side of the second tension spring 22 away from the second embedded block 15 is installed at the end of the second guide groove 21; during the movement of the wedge block 11, the second embedded block 15 can be driven to move in the second guide groove 21 by the four-link 18, and the movement process is more stable and smooth, thereby improving safety and reliability. When resetting, the second tension spring 22 pulls the second embedded block 15 to reset, and at the same time, the wedge block 11 is driven to reset through the four-link 18.
[0035] It is worth noting that, in this embodiment, a switch top plate 28 is provided at the lower end of the second slider 17, and an in-position electrical switch 29 mounted on the rope clamp support 33 is provided below the switch top plate 28; during the movement of the four-link 18, the first slider 16 and the second slider 17 move on the slide rail, thereby improving the smoothness of the entire structure and thus improving reliability.
[0036] In this embodiment, a switch top plate 28 is provided at the lower end of the second slider 17, and an in-position electrical switch 29 mounted on the rope gripper support 33 is provided below the switch top plate 28. After the solenoid valve 13 is triggered, the four-link 18 moves toward each other driven by the wedge block 11 and the movable plate 14, causing the first slider 16 and the second slider 17 to move away from each other in the longitudinal direction until the switch top plate 28 contacts the in-position electrical switch 29. This allows the in-position electrical switch 29 to verify that the elevator car overspeed and accidental car movement protection brake system has been activated.
[0037] A pressure sensor 34 is mounted on the movable contact of the solenoid valve 13 of this embodiment. When the pressure sensor 34 moves, a pressure threshold is generated. The pressure threshold is used to verify whether the movable contact of the solenoid valve 13 has moved into position, and then to confirm whether the clamping force generated by the multi-link wedge-clamping rope clamp 8 for clamping the first steel rope 5 meets the design requirement, thereby ensuring that the car is effectively stopped or decelerated to a stop. The in-position electrical switch 29 is communicatively connected to the controller 2 so that the controller 2 detects that the second slider 17 has moved to a specified position and thereby determines that the four-link mechanism 18 has been actuated into position, i.e., the braking system for protecting the elevator car from up and down overspeed and unexpected car movement has issued a braking in-position signal to the car 6. This allows maintenance personnel or installers to adjust the pressure of the solenoid valve 13 based on the data from the pressure sensor 34, thereby enabling the in-position electrical switch 29 to detect whether the braking system for protecting the elevator car from up and down overspeed and unexpected car movement has reliably braked the car.
[0038] refer to Figure 4As shown, in this embodiment, a pressure sensor 34 is mounted on the movable contact of the solenoid valve 13. The in-position electrical switch 29 is in communication with the controller 2. This allows the controller 2 to detect that the second slider 17 has moved to a specified position and determine whether the elevator car's up / down overspeed and unexpected car movement protection braking system has braked the car 6. This allows maintenance personnel or installers to adjust the pressure of the solenoid valve 13 based on the data from the pressure sensor. The in-position electrical switch 29 can then detect whether the elevator car's up / down overspeed and unexpected car movement protection braking system has reliably braked the car 6. The clamping force between the first clamping block assembly 9 and the second clamping block assembly 10 is achieved by the pressure exerted by the movable contact of the solenoid valve on the pressure block 12. The pressure block 12 generates a resistance F on the movable contact. This resistance F is detected by the pressure sensor 34. During the assembly or installation of the elevator, this resistance F needs to be tested and the pressure F(X) of the movable contact adjusted. The calculation formula is: F(X) = (k1·k2X-R)f1·f2. Where: f1 and f2 are the friction coefficients between the moving plate or roller and the wire rope, respectively; k1 is the component's operating friction damping coefficient; k2 is the component's mechanical efficiency; R is the spring tension; and X is the pressure sensor operating value (design range). The pressure sensor operating value, X, is randomly adjusted during the safety component type test. Its range is from the point at which an unloaded car at any landing remains stationary when the main engine brake is deactivated to the point at which the car's speed is reduced to at least the design range of the counterweight buffer.
[0039] In this embodiment, the speed limiter 32 is equipped with an encoder on its shaft, which serves as the triggering device for the rope clamp 8. When the car 6 is running at an abnormal speed or moves unexpectedly, the triggering device detects the car overspeeding or unexpected movement in the upward or downward directions. The controller 2 activates the moving contact of the solenoid valve 13 in the multi-link wedge-clamping rope clamp 8, ensuring that the car is effectively stopped or decelerated to a stop.
[0040] In this embodiment, the speed limiter 32 is equipped with an encoder on its shaft, which serves as the triggering device for the rope clamp 8. When the car 6's operating speed becomes abnormal, i.e., when the triggering device detects that the car's downward speed exceeds 120% of its rated speed, the controller 2 activates the moving contact of the solenoid valve 13 in the multi-link wedge-clamping rope clamp 8. The pressure sensor operating value X is randomly adjusted based on the safety component type test. The range of its value is sufficient to slow down the fully loaded car to a stop, or at least reduce the car's speed to the designed range of the car buffer, in the event of a failure of the main engine brake or the speed limiter.
[0041] This embodiment also includes a communication module and an elevator remote safety ecological monitoring terminal. The communication module is electrically connected to the controller 2, the encoder on the speed limiter 32 axis, the in-position electrical switch and the elevator remote safety ecological monitoring terminal respectively; the communication module is a 5G communicator, and can also be an AI chip. The elevator remote safety ecological monitoring terminal is a mobile phone or a computer, or other IoT terminal devices with a screen.
[0042] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It is apparent to those skilled in the art that various changes, modifications, substitutions, and variations to these embodiments may be made without departing from the principles and spirit of the present invention, and these changes and modifications still fall within the scope of protection of the present invention.
Claims
1. An elevator car overspeed and car accidental movement protection braking system, which has a hoistway (1), characterized in that: A machine room is provided on the shaft (1), a car (6) is provided in the shaft (1), a driving main unit (3), a guide wheel (4) and a controller (2) are provided in the machine room, a traction wheel is installed on the output shaft of the driving main unit (3), a first steel rope (5) is wound around the traction wheel and the guide wheel (4), one end of the first steel rope (5) is connected to the car (6), and the other end is connected to the counterweight frame (7); One side of the car (6) is connected to a speed limiter (32) via a second steel rope, an encoder is installed on the shaft of the speed limiter (32), and a multi-link wedge clamping type rope clamp (8) is also clamped and installed on the first steel rope (5), and the multi-link wedge clamping type rope clamp (8) includes a first clamping block assembly (9) and a second clamping block assembly (10) on both sides of the first steel rope (5) on one side of the traction wheel, a first slider (16) is provided on both sides above between the first clamping block assembly (9) and the second clamping block assembly (10), and a second slider (17) is provided on both sides below, and the side surfaces of the first clamping block assembly (9), the second clamping block assembly (10), the first slider (16) and the second slider (17) are hinged to each other through a four-link (18), and an electronic top pressure assembly installed in the machine room of the hoistway (1) is provided on the side of the first clamping block assembly (9) away from the first steel rope (5); The electronic top-pressing assembly and the encoder are both in communication connection with the controller (2). When the encoder detects that the car (6) is running at an abnormal speed or moves unexpectedly, the encoder feeds back a signal to the controller (2). The controller (2) sends an action signal to the electronic top-pressing assembly, and the electronic top-pressing assembly presses the first clamping block assembly (9), causing the first clamping block assembly (9) and the second clamping block assembly (10) to move in opposite directions through the four-link (18) and clamp the first steel rope (5).
2. The elevator car overspeed and car accidental movement protection braking system according to claim 1 is characterized in that: The first clamping block assembly (9) and the second clamping block assembly (10) are both movably mounted on a rope clamp support (33), and the rope clamp support (33) is mounted on a machine room load-bearing beam (35) of the shaft (1). The electronic top pressure assembly is a solenoid valve (13), and the solenoid valve (13) is mounted on the rope clamp support (33). The solenoid valve (13) has a moving contact at one end close to the first clamping block assembly (9), and the moving contact is in contact with a side surface of the first clamping block assembly (9).
3. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 2 is characterized in that: The first clamping block assembly (9) includes a wedge block (11) and a pressure block (12); a first guide groove (19) is provided on the inner wall of the rope clamp support (33) on the side close to the pressure block (12); the pressure block (12) is located in the first guide groove (19); an embedding groove (23) is provided on the side of the pressure block (12) close to the wedge block (11); a first embedding block (24) hinged to one side of the four-link (18) is provided on the side of the wedge block (11) close to the embedding groove (23); and a vertically symmetrical oblique groove is provided on the side of the wedge block (11) close to the first steel rope (5). A spacer is provided between the upper and lower symmetrical inclined surfaces (25), and the inclination angle depth of the inclined surface (25) gradually deepens toward the spacer. Rollers (26) are provided on the upper and lower sides of the spacer, and the roller (26) includes at least two cylinders, and at least two of the cylinders (18) are connected through an axis core (30). Tension spring mounting grooves (31) are provided at both ends of the axis core (30), and a third tension spring (27) is connected in the tension spring mounting grooves (31) at both ends. The other end of the third tension spring (27) is connected to the end face of the first embedded block (24).
4. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 3 is characterized in that: A first tension spring (20) is installed on the side of the pressure block (12) away from the wedge block (11), and an end of the first tension spring (20) away from the pressure block (12) is installed at the end of the first guide groove (19).
5. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 3 is characterized in that: The second clamping block assembly (10) includes a movable plate (14) and a second embedded block (15); a second guide groove (21) is provided on the inner wall of the rope clamp support (33) on the side close to the movable plate (14); the second embedded block (15) is embedded in the second guide groove (21); the other side of the four-link (18) is hingedly mounted on the second embedded block (15); a second tension spring (22) is installed on the side of the second embedded block (15) away from the movable plate (14); and the second tension spring (22) is installed at the end of the second guide groove (21) on the side away from the second embedded block (15).
6. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 5 is characterized in that: The first slider (16) and the second slider (17) are respectively mounted on the rope clamp support (33) via slide rails.
7. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 6 is characterized in that: A switch top plate (28) is provided at the lower end of the second slider (17), and an in-position electrical switch (29) mounted on the rope clamp support (33) is provided below the switch top plate (28).
8. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 7 is characterized in that: A pressure sensor (34) is installed on the moving contact of the solenoid valve (13). When the pressure sensor (34) moves, a pressure threshold is generated. The pressure threshold is used to verify whether the moving contact on the solenoid valve (13) moves to the right position, and then confirm whether the clamping force generated by the multi-link wedge clamping rope clamp (8) to clamp the first steel rope (5) meets the design requirement value, ensuring that the car is effectively stopped or decelerated. The in-position electrical switch (29) is connected to the controller (2) for communication, so that the controller (2) detects that the second slider (17) moves to the specified position, thereby judging that the four-link (18) mechanism is in position, that is, the braking system for protecting the elevator car from overspeeding and accidental movement of the car has sent a braking in-position signal to the car (6).
9. An elevator car up and down overspeed and car accidental movement protection braking system according to any one of claims 1 to 8, characterized in that: The speed limiter (32) is provided with an encoder on its shaft, which serves as a triggering device for the rope clamp (8). When the car (6) is running at an abnormal speed or moves unexpectedly, the triggering device detects the car's upward or downward overspeed or unexpected movement, and activates the moving contact on the electromagnetic valve (13) in the multi-link wedge clamping rope clamp (8) through the controller (2), thereby ensuring that the car is effectively stopped or decelerated to a stop.
10. The elevator car up and down overspeed and car accidental movement protection braking system according to claim 9, characterized in that: It also includes a communication module and an elevator remote safety ecological monitoring terminal, wherein the communication module is electrically connected to the controller (2), the speed limiter (32) shaft encoder, the in-position electrical switch and the elevator remote safety ecological monitoring terminal respectively; The communication module is a 5G communicator, and the elevator remote safety ecological monitoring terminal is a mobile phone or a computer.