Anti-falling brake structure of double-car running mining elevator

Abstract

The invention provides an anti-falling braking structure for a double-car running mining elevator, and relates to the technical field of anti-falling of mining elevators, the anti-falling braking structure comprises a guide rail frame and cars, a control cabinet and a traction machine are arranged above the guide rail frame, two supporting rods are fixedly connected in the guide rail frame, and a connecting frame is fixedly connected to the upper surface of the car; according to the braking structure, the speed limiter, the control cabinet, the servo motor, the air cylinder and other components work cooperatively, multi-stage braking of the lift car is achieved, when the descending speed of the lift car exceeds the rated speed by a certain proportion, the speed limiter is triggered, the control cabinet starts the servo motor, the lead screw is driven to rotate, and the lift car is braked. And meanwhile, the control cabinet controls the air cylinder to push the limiting block and the supporting rod to be clamped and locked, the lift car is prevented from continuing to descend, and the safety of elevator operation is greatly improved through the double-guarantee braking mode.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-falling of mine elevators, and more specifically, particularly relates to an anti-falling braking structure for a mine elevator with double-carriage operation. Background Art

[0002] The anti-falling braking structure for a mine elevator with double-carriage operation is a key part to ensure the safe operation of the mine elevator. In the mine environment, the elevator undertakes the important tasks of transporting personnel and materials, and its safety is of crucial importance. This braking structure is usually arranged between the elevator car and the guide rail frame, and is in a standby state during the normal operation of the elevator. Once the elevator has an abnormal falling situation, it will be quickly activated to play a braking role.

[0003] In practical applications, the anti-falling braking structure for a mine elevator with double-carriage operation generally includes the following main parts:

[0004] 1. The guide rail frame, as the support structure for the elevator operation, provides a stable running track for the carriages, and at the same time is an important installation foundation for the braking structure, and needs to have sufficient strength and stability to withstand various acting forces during the elevator operation process.

[0005] 2. The carriage is the carrier for carrying personnel and goods, and is closely connected with the braking structure. A variety of braking-related components are installed on the carriage, such as connecting frames, fixing frames, fixing plates, etc. These components play a role in transmitting force and acting in coordination during the braking process.

[0006] 3. The control cabinet, as the control center of the elevator, receives signals from sensors such as speed limiters, and controls the actions of actuators such as servo motors and cylinders according to the signals to achieve precise control of the braking process.

[0007] 4. The traction machine is responsible for driving the lifting movement of the elevator carriages, providing power during normal operation, and during the braking process, its working state will also be affected and controlled by the braking structure.

[0008] Currently, in order to achieve the safe braking of mine elevators, a variety of technologies and structures have been adopted in the industry. Some elevators use the traditional safety clamp-speed limiter braking method, where the speed limiter monitors the elevator speed, and when the speed exceeds the specified value, the safety clamp is triggered to clamp the guide rail to achieve braking. There are also some elevators using a hydraulic buffer braking structure, where a hydraulic buffer is installed at the bottom of the carriage. When the carriage falls, the hydraulic buffer slows down the impact force of the carriage by consuming energy. In addition, some advanced elevators are equipped with an electronic braking system, which uses the reverse rotation of the motor to generate a braking torque and cooperates with the mechanical braking device to jointly achieve braking.

[0009] However, there are still some problems in the above-mentioned existing technologies in practical applications. In the traditional safety gear - speed limiter braking method, after long-term use, wear is likely to occur between the brake blocks of the safety gear and the guide rail, resulting in a decrease in braking effect and even possible braking failure. The hydraulic buffer braking structure has relatively high requirements for the quality and maintenance of hydraulic oil. If the hydraulic oil leaks or deteriorates, it will seriously affect the braking performance. Although the electronic braking system has a fast response speed, it is easily interfered in the complex electromagnetic environment of the mine, resulting in inaccurate braking control. In addition, most of the existing braking structures lack a multiple safeguard mechanism. Once a key component fails, the reliability of the entire braking system will be threatened. In response to these problems, the present application proposes a brand-new anti-falling braking structure for a mine elevator with double carriages running. This structure realizes multi-stage braking through the coordinated work of multiple components. When the speed of the carriage is abnormal, first, the limiting plate is used to fit with the round rod for deceleration and buffering, and then the limiting block is clamped and locked with the support rod to double-guarantee the braking effect. At the same time, an energy absorption system composed of a buffer and a shock-absorbing spring is equipped. When the carriage falls to the bottom, it can effectively absorb kinetic energy and reduce the impact force on the personnel and equipment in the carriage, greatly improving the safety and reliability of the elevator operation. Summary of the Invention

[0010] In order to solve the above technical problems, the present invention provides an anti-falling braking structure for a mine elevator with double carriages running to solve the above problems.

[0011] An anti-falling braking structure for a mine elevator with double carriages running includes a guide rail frame and a carriage. Above the guide rail frame, there are a control cabinet and a traction machine. Two support rods are fixedly connected inside the guide rail frame. A connecting frame is fixedly connected to the upper surface of the carriage. A fixing frame is fixedly connected to the front surface of the connecting frame. Limiting blocks for limiting are arranged on both the upper and lower sides of the fixing frame. A fixing plate is fixedly connected to the rear surface of the carriage. Two rollers are fixedly connected to both the upper and lower sides of the fixing plate. Two positioning blocks are movably connected inside the fixing plate. Fixed blocks are fixedly connected to the rear surfaces of the two positioning blocks. Limiting plates are fixedly connected to the opposite surfaces of the two fixed blocks. A lead screw is rotatably connected inside the fixing plate. A buffer frame is fixedly connected to the lower surface of the guide rail frame. Two buffers are arranged above the buffer frame. Two movable blocks are movably connected inside the buffer frame. A shock-absorbing spring is fixedly connected between the two movable blocks. Cylinders are fixedly installed on both the upper and lower sides of the fixing frame. The pistons of the two cylinders are respectively fixedly connected to the two limiting blocks.

[0012] Preferably, brackets are fixedly connected to the front surfaces of the two limiting blocks. Both brackets are movably connected to the fixing frame. Sliders are fixedly connected to both the left and right sides of the fixing frame. The two sliders are respectively movably connected to the two support rods. The two support rods are respectively movably clamped with the two limiting blocks.

[0013] Preferably, the lead screw is threadedly sleeved with two positioning blocks. A servo motor is fixedly installed on the left surface of the fixed plate. The output shaft of the servo motor is fixedly connected to the lead screw. Two round rods are fixedly connected inside the guide rail frame, and the two round rods are respectively in contact with the two limiting plates.

[0014] Preferably, a connecting plate is movably clamped on the upper surface of the buffer frame. The connecting plate is fixedly connected to two buffers. Two connecting rods are rotatably connected to the opposite sides of the two pulleys, and the two pairs of connecting rods are respectively fixedly connected to the buffer frame and the connecting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] In the present invention, the braking structure realizes multi-stage braking of the car through the coordinated work of multiple components such as a speed limiter, a control cabinet, a servo motor, and a cylinder. When the descending speed of the car exceeds a certain proportion of the rated speed, the speed limiter is triggered, and the control cabinet starts the servo motor to drive the lead screw to rotate, so that the limiting plate is in contact with the round rod to generate frictional force for deceleration and buffering. At the same time, the control cabinet controls the cylinder to push the limiting block to be clamped and locked with the support rod to prevent the car from continuing to descend. This double-guarantee braking method greatly improves the safety of elevator operation and effectively reduces the risk of falling accidents.

[0017] In the present invention, when the car falls to the bottom, the buffer and shock-absorbing spring arranged below form an efficient energy absorption system. The buffer first absorbs most of the kinetic energy of the car and slows down the impact force through its own deformation. Then, the shock-absorbing spring further buffers and extends the deceleration time of the car, greatly reducing the harm of the impact force to the people and equipment in the car and providing the last reliable guarantee for the safe operation of the elevator.

[0018] In the present invention, the connection and cooperation between the components are reasonably designed. For example, the limiting block is movably connected to the fixed frame through a bracket to ensure its stability during movement. The fixed frame is movably connected to the support rod through a slider, which helps to improve the smoothness of the operation of the entire car. These design details ensure the reliability of the braking structure during operation and reduce the risk of braking failure caused by unstable structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic diagram of the double-car anti-falling structure of the present invention;

[0021] Figure 3 is a side view of the overall structure of the present invention;

[0022] Figure 4 is a schematic diagram of the buffer frame structure of the present invention;

[0023] Figure 5 is a schematic diagram of the car structure of the present invention;

[0024] Figure 6 is a schematic diagram of the fixing frame structure of the present invention;

[0025] Figure 7 is a schematic diagram of the fixing plate structure of the present invention;

[0026] Figure 8 is a schematic diagram of the limit plate structure of the present invention.

[0027] In the figure, the corresponding relationship between the component names and the attached drawing numbers is as follows: 1. Guide rail frame; 2. Control cabinet; 3. Traction machine; 4. Support rod; 5. Car; 6. Connecting frame; 7. Fixing frame; 8. Buffer frame; 9. Round rod; 10. Buffer; 11. Connecting plate; 12. Movable block; 13. Shock-absorbing spring; 14. Pulley; 15. Connecting rod; 16. Limit block; 17. Cylinder; 18. Slide block; 19. Bracket; 20. Servo motor; 21. Fixing plate; 22. Roller; 23. Lead screw; 24. Positioning block; 25. Fixed block; 26. Limit plate. Specific embodiments

[0028] The following further describes in detail the embodiments of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0029] Please refer to Figure 1 - Figure 8, the present invention provides an anti-falling braking structure for a double-car running mine elevator, which includes a guide rail frame 1 and a car 5. Above the guide rail frame 1, there is a control cabinet 2 and a traction machine 3. Two support rods 4 are fixedly connected inside the guide rail frame 1. A connecting frame 6 is fixedly connected to the upper surface of the car 5. A fixing frame 7 is fixedly connected to the front surface of the connecting frame 6. Limit blocks 16 for limiting are arranged on both the upper and lower sides of the fixing frame 7. A fixing plate 21 is fixedly connected to the rear surface of the car 5. Two rollers 22 are fixedly connected to both the upper and lower sides of the fixing plate 21. Two positioning blocks 24 are movably connected inside the fixing plate 21. Fixing blocks 25 are fixedly connected to the rear surfaces of the two positioning blocks 24. Limiting plates 26 are fixedly connected to the opposite surfaces of the two fixing blocks 25. A lead screw 23 is rotatably connected inside the fixing plate 21. A buffer frame 8 is fixedly connected to the lower surface of the guide rail frame 1. Two buffers 10 are arranged above the buffer frame 8. Two movable blocks 12 are movably connected inside the buffer frame 8. A shock-absorbing spring 13 is fixedly connected between the two movable blocks 12. Cylinders 17 are fixedly installed on both the upper and lower sides of the fixing frame 7. The pistons of the two cylinders 17 are fixedly connected to the two limit blocks 16 respectively. During the operation of the elevator, a speed limiter is installed on the upper surface of the car 5, and its function is to monitor the running speed of the elevator in real time. When the descending speed of the car 5 exceeds a specific proportion of the rated speed, the speed limiter immediately triggers an action and sends a signal to the control cabinet 2. After receiving the signal, the control cabinet 2 starts the servo motor 20 to operate. The output shaft of the servo motor 20 drives the lead screw 23 fixedly connected thereto to rotate. When the lead screw 23 rotates, the two positioning blocks 24 sleeved thereon generate displacements under the action of thread transmission. The two positioning blocks 24 move in opposite directions, and then drive the fixing blocks 25 fixedly connected thereto to move synchronously. The two fixing blocks 25 drive the limiting plates 26 fixed thereon to move. When the two limiting plates 26 move in opposite directions and are in close contact with the two round rods 9 fixed inside the guide rail frame 1, frictional force will be generated to achieve deceleration and buffering of the car 5.

[0030] A bracket 19 is fixedly connected to the front surface of each of the two limit blocks 16. Both brackets 19 are movably connected to the fixed frame 7. A slider 18 is fixedly connected to each of the left and right sides of the fixed frame 7. The two sliders 18 are respectively movably connected to the two support rods 4. The two support rods 4 are respectively movably clamped to the two limit blocks 16. At the same time, the control cabinet 2 also sends a signal to the two cylinders 17. After receiving the signal, the piston of the cylinder 17 pushes the fixed limit block 16 to move. The two limit blocks 16 are movably connected to the fixed frame 7 through the brackets 19 fixed thereto, ensuring the stability during the movement process. The two limit blocks 16 move away from each other until they are clamped to the support rods 4. Since a set of serrated grooves corresponding to the limit blocks 16 are provided on the surface of the support rods 4, the two are locked after being clamped, thereby preventing the car 5 from continuing to descend and completing the braking process. This braking method realizes the multi-stage braking of the car 5 through the coordinated work of multiple components such as the speed limiter, the control cabinet 2, the servo motor 20, and the cylinder 17. When the speed of the car 5 is abnormal, it first decelerates and buffers by the contact between the limit plate 26 and the round rod 9, and then uses the clamping and locking of the limit block 16 and the support rod 4 to double-guarantee the braking effect, effectively improving the safety of the elevator operation and reducing the risk of falling accidents.

[0031] The lead screw 23 is threadedly sleeved with two positioning blocks 24. A servo motor 20 is fixedly installed on the left surface of the fixed plate 21. The output shaft of the servo motor 20 is fixedly connected to the lead screw 23. Two round rods 9 are fixedly connected inside the guide rail frame 1. The two round rods 9 are respectively in contact with the two limit plates 26. A connecting plate 11 is movably clamped to the upper surface of the buffer frame 8. The connecting plate 11 is fixedly connected to the two buffers 10. Two connecting rods 15 are rotatably connected to the opposite surfaces of the two pulleys 14. The two pairs of connecting rods 15 are respectively fixedly connected to the buffer frame 8 and the connecting plate 11. When the car 5 continues to fall and contacts the two buffers 10 arranged below, the buffers 10 start to function, absorbing the kinetic energy of the car 5 and slowing down the impact force of the car 5 through its own deformation. At the moment when the buffers 10 contact the car 5, it drives the connecting plate 11 fixed thereto to move downward. When the connecting plate 11 moves downward under the action of pressure, it drives the two fixed connecting rods 15 to move. Since the two connecting rods 15 are rotatably connected to the two movable blocks 12, the downward movement of the connecting plate 11 causes the two connecting rods 15 to rotate. The position change of the connecting rods 15 presents a relative movement state, thereby pushing the two fixed movable blocks 12 to move relatively. During the relative movement of the two movable blocks 12, the shock absorption springs 13 will be compressed, and the elastic deformation of the shock absorption springs 13 is used to further absorb the impact force, achieving the purpose of protecting the safety of the personnel and equipment in the car 5. The buffers 10 and the shock absorption springs 13 together form an efficient energy absorption system. When the car 5 falls to the bottom, the buffers 10 first absorb most of the kinetic energy, and then the shock absorption springs 13 further buffer, extending the deceleration time of the car 5 and greatly reducing the harm of the impact force to the personnel and equipment in the car 5, providing the last reliable guarantee for the safe operation of the elevator.

[0032] Working principle:

[0033] First step, during the operation of the elevator, a speed limiter is installed on the upper surface of the car 5, whose function is to monitor the elevator running speed in real time. When the descending speed of the car 5 exceeds a specific proportion of the rated speed, the speed limiter immediately triggers an action and sends a signal to the control cabinet 2. After receiving the signal, the control cabinet 2 starts the operation of the servo motor 20. The output shaft of the servo motor 20 drives the screw rod 23 fixed thereto to rotate. When the screw rod 23 rotates, two positioning blocks 24 sleeved thereon generate displacements under the action of screw thread transmission. The two positioning blocks 24 move in opposite directions, and then drive the fixed blocks 25 fixed thereto to move synchronously. The two fixed blocks 25 drive the limit plates 26 fixed thereon to move. When the two limit plates 26 move in opposite directions and closely fit with two round rods 9 fixed in the guide rail frame 1, frictional force will be generated to achieve deceleration and buffering of the car 5. At the same time, the control cabinet 2 also sends a signal to the two cylinders 17. After receiving the signal, the pistons of the cylinders 17 push the fixed limit blocks 16 to move. The two limit blocks 16 are movably connected to the fixed frame 7 through the brackets 19 fixed thereto to ensure the stability of the moving process. The two limit blocks 16 move in opposite directions and are clamped with the support rod 4. Since a set of sawtooth grooves corresponding to the limit blocks 16 are provided on the surface of the support rod 4, the two are locked after being clamped, thereby preventing the car 5 from continuing to descend and completing the braking process. This braking method realizes multi-stage braking of the car 5 through the coordinated work of multiple components such as the speed limiter, the control cabinet 2, the servo motor 20, and the cylinders 17. When the speed of the car 5 is abnormal, first, deceleration and buffering are carried out by the close fit of the limit plate 26 and the round rod 9, and then the limit block 16 and the support rod 4 are clamped and locked, double guaranteeing the braking effect, effectively improving the safety of elevator operation and reducing the risk of falling accidents.

[0034] Second step

[0035] When the car 5 continues to fall and contacts the two buffers 10 arranged below, the buffers 10 start to function, absorb the kinetic energy of the car 5, and slow down the impact force of the car 5 through its own deformation. At the moment when the buffer 10 contacts the car 5, it drives the connecting plate 11 fixed to it to move downward. When the connecting plate 11 moves downward under the action of pressure, it drives the two fixed connecting rods 15 to move. Since the two connecting rods 15 are rotatably connected to the two movable blocks 12, the downward movement of the connecting plate 11 causes the two connecting rods 15 to rotate. The position change of the connecting rods 15 presents a relative movement state, and then pushes the two fixed movable blocks 12 to move relatively. During the relative movement of the two movable blocks 12, the shock-absorbing springs 13 will be compressed, and the elastic deformation of the shock-absorbing springs 13 is used to further absorb the impact force, achieving the purpose of protecting the safety of the personnel and equipment in the car 5. The buffer 10 and the shock-absorbing spring 13 together form an efficient energy absorption system. When the car 5 falls to the bottom, the buffer 10 first absorbs most of the kinetic energy, and then the shock-absorbing spring 13 further buffers, extending the deceleration time of the car 5 and greatly reducing the harm of the impact force to the personnel and equipment in the car 5, providing the last reliable guarantee for the safe operation of the elevator.

[0036] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are chosen and described in order to better illustrate the principles of the invention and its practical application, and to enable those of ordinary skill in the art to understand the invention and design various embodiments with various modifications suitable for specific purposes.

Claims

1. A fall prevention braking structure for a double - car operating mine elevator, comprising a guide rail frame (1) and a car (5), wherein a control cabinet (2) and a traction machine (3) are arranged above the guide rail frame (1), and it is characterized in that: Two support rods (4) are fixedly connected inside the guide rail frame (1). A connecting frame (6) is fixedly connected to the upper surface of the car (5). A fixing frame (7) is fixedly connected to the front surface of the connecting frame (6). Limit blocks (16) for limiting are arranged on both the upper and lower sides of the fixing frame (7). A fixing plate (21) is fixedly connected to the rear surface of the car (5). Two rollers (22) are fixedly connected to both the upper and lower sides of the fixing plate (21). Among them, two positioning blocks (24) are movably connected inside the fixing plate (21). Fixing blocks (25) are fixedly connected to the rear surfaces of the two positioning blocks (24). Limiting plates (26) are fixedly connected to the opposite surfaces of the two fixing blocks (25). A lead screw (23) is rotatably connected inside the fixing plate (21). A buffer frame (8) is fixedly connected to the lower surface of the guide rail frame (1). Two buffers (10) are arranged above the buffer frame (8). Two movable blocks (12) are movably connected inside the buffer frame (8). A shock-absorbing spring (13) is fixedly connected between the two movable blocks (12).

2. The anti-falling braking structure of a mine elevator with double carriages running as described in claim 1, characterized in that, Cylinders (17) are fixedly installed on both the upper and lower sides of the fixing frame (7). Among them, the pistons of the two cylinders (17) are fixedly connected to the two limit blocks (16) respectively.

3. The anti-falling braking structure of a double-car running mine elevator according to claim 1, characterized in that Support brackets (19) are fixedly connected to the front surfaces of the two limit blocks (16). Among them, the two support brackets (19) are movably connected to the fixing frame (7).

4. The anti-falling braking structure of a double-car running mine elevator according to claim 1, wherein, Sliders (18) are fixedly connected to both the left and right sides of the fixing frame (7). Among them, the two sliders (18) are movably connected to the two support rods (4) respectively.

5. The anti-falling braking structure of a double-car running mine elevator as described in claim 1, wherein, The two support rods (4) are movably clamped with the two limit blocks (16) respectively.

6. The anti-falling braking structure of a double-car operating mine elevator according to claim 1, characterized in that, The lead screw (23) is threadedly sleeved with the two positioning blocks (24).

7. The anti-falling braking structure of a double-car operating mine elevator according to claim 1, characterized in that, A servo motor (20) is fixedly installed on the left surface of the fixing plate (21). Among them, the output shaft of the servo motor (20) is fixedly connected to the lead screw (23).

8. The anti-falling braking structure of a double-car running mine elevator according to claim 1, characterized in that, Two round rods (9) are fixedly connected inside the guide rail frame (1). Among them, the two round rods (9) are respectively in contact with the two limiting plates (26).

9. The anti-falling braking structure of a double-car running mine elevator according to claim 1, characterized in that, A connecting plate (11) is movably clamped on the upper surface of the buffer frame (8). Among them, the connecting plate (11) is fixedly connected to the two buffers (10).

10. The anti-falling braking structure of a double-car running mine elevator according to claim 1, characterized in that, Two connecting rods (15) are rotatably connected to the opposite surfaces of the two pulleys (14). Among them, the two pairs of connecting rods (15) are fixedly connected to the buffer frame (8) and the connecting plate (11) respectively.

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