Elevator car stall detection device

Abstract

The utility model relates to the technical field of elevators, in particular to an elevator car stall detection device which comprises a base and two supporting parts arranged on the base, a rotating rod is arranged between the two supporting parts, a steel rope is sleeved on the rotating rod, a rotating speed sensor is arranged on each supporting part, the elevator car stall detection device further comprises a rotating disc, the rotating disc is arranged on the supporting parts, and the rotating disc is fixedly connected with the rotating rod. The lock hook is arranged on the peripheral side of the turntable; the electric telescopic rod is arranged on the base, a lock catch is arranged at the output end of the electric telescopic rod, the lock catch is connected with the brake rope, the free end of the brake rope is connected with a buffer block, the buffer block is arranged on the base, and the electric telescopic rod is in signal connection with the rotating speed sensor through a controller. By arranging the brake rope, when the rotating speed sensor senses that the rotating speed of the rotating rod exceeds a preset threshold value, the controller can control the electric telescopic rod to lift the lock catch to buckle the lock hook, and then the brake rope is straightened to forcibly brake the car, so that the car is prevented from falling.

Description

Technical Field

[0001] The utility model relates to the technical field of elevators, in particular to an elevator car stall detection device. Background Art

[0002] The elevator car is a box-shaped space used by the elevator to carry and transport people and materials. It is generally composed of the car bottom, car wall, car roof, car door and other main components. It is the part of the elevator that transports passengers or goods. Its internal net height should not be less than 2 meters, and the ceiling is usually made of mirror stainless steel.

[0003] In order to detect whether the elevator is overspeeding or stalling during operation, the elevator is generally equipped with a stall detection device. When the speed of the elevator car exceeds the set safety range, the device will trigger the corresponding safety mechanism, such as emergency braking, to prevent the elevator from continuing to overspeed, thereby protecting the safety of passengers. For example, the existing patent with publication number CN212924020U proposes an elevator overspeed detection device, which bypasses one side of the elevator's steel rope group around the outside of the drum and the guide cylinder, and at the same time allows the steel rope group to enter the inside of the ring groove group. During the elevator lifting process, the steel rope group is under the action of friction. The guide cylinder is driven to rotate around the rotating rod. When the elevator moves at an overspeed, the steel rope group drives the guide cylinder to rotate at an overspeed. The speed sensor detects the overspeed rotating guide cylinder and transmits the signal to the controller. The controller controls the electric valve to open. The electric valve is connected to the external hydraulic pump. The external hydraulic pump introduces the brake fluid into the U-shaped cavity through the electric valve and the joint. The brake fluid squeezes the piston, and the piston drives the friction plate to fit the brake disc. Under the action of friction, the brake disc slows down, and the brake disc drives the guide cylinder to slow down. The steel rope group and the guide cylinder frictionally decelerate, reducing the load of the elevator drive device, thereby achieving the purpose of auxiliary deceleration.

[0004] However, in the above technical solution, although the cooperation between the speed sensor and the electric valve can detect overspeeding and timely brake the elevator car, it relies on friction to reduce the load of the elevator drive device. Although the purpose of auxiliary deceleration is achieved, when the friction between the friction plate and the brake disc is insufficient, there may be safety hazards. Therefore, the utility model aims to provide an elevator car stall detection device that can more stably detect stalls of the car and brake the car in time. Utility Model Content

[0005] In view of the shortcomings of the prior art, the utility model provides an elevator car stall detection device, which can more stably detect the stall of the car and brake the car in time, so as to solve the problem that it is difficult to stably detect the stall of the car and brake the car in time in the prior art.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an elevator car stall detection device, including a base and two support parts arranged on the base and relatively spaced apart, a rotating rod is rotatably provided between the two support parts, a steel rope is sleeved on the rotating rod, a speed sensor is provided on the support part, and also includes a turntable, which is arranged on the support part, and the turntable is fixedly connected to the rotating rod; a lock hook is arranged on the circumference of the turntable; and an electric telescopic rod, which is arranged on the base, a lock buckle is provided on the output end of the electric telescopic rod, the lock buckle is connected to the brake rope, the free end of the brake rope is connected to a buffer block, the buffer block is arranged on the base, and the electric telescopic rod is connected to the speed sensor signal through a controller.

[0007] Optionally, a plurality of first friction-increasing protrusions are provided at intervals inside the lock buckle.

[0008] Optionally, a plurality of second friction-increasing protrusions are provided at intervals on the lock hook.

[0009] Optionally, a buffer cavity is defined inside the base, and a buffer groove connected to the buffer cavity is provided on the base along the length direction of the buffer cavity. A sliding block is slidably provided in the buffer cavity, and the sliding block is fixed to the buffer block. A spring is provided in the buffer cavity, and the spring elastically abuts against the sliding block.

[0010] Optionally, a guide rod is fixed in the buffer cavity, and the guide rod movably passes through the sliding block.

[0011] Optionally, a buffer protrusion is provided in the buffer cavity, and the buffer protrusion is arranged at an end away from the sliding block.

[0012] Compared with the prior art, the utility model provides an elevator car stall detection device, which has the following beneficial effects:

[0013] The utility model sets a brake rope. When the speed sensor senses that the speed of the rotating rod exceeds a predetermined threshold, the controller controls the electric telescopic rod to raise the lock buckle and buckle the lock hook. The brake rope is then straightened to force the car to brake and prevent the car from falling.

[0014] The utility model provides a first friction-increasing protrusion. When the lock hook hooks the lock buckle, the first friction-increasing protrusion located inside the lock buckle increases the friction between the lock hook and the lock buckle to prevent the lock hook from being separated from the lock buckle.

[0015] The utility model provides the second friction-increasing protrusion, and when the lock hook hooks the lock buckle, the second friction-increasing protrusion on the lock hook increases the friction between the lock hook and the lock buckle to prevent the lock hook from being separated from the lock buckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A three-dimensional structural schematic diagram of the utility model is shown;

[0017] Figure 2 Shows Figure 1 A schematic diagram of the enlarged structure at point A;

[0018] Figure 3 A schematic diagram of a three-dimensional cutaway structure of the utility model is shown;

[0019] Figure 4 Shows Figure 3 A schematic diagram of the enlarged structure at B;

[0020] Figure 5 The three-dimensional structure schematic diagram of the utility model after the steel rope is removed is shown.

[0021] In the figure: 1. base; 2. support part; 3. rotating rod; 4. steel rope; 5. speed sensor; 6. turntable; 7. locking hook; 8. locking buckle; 9. electric telescopic rod; 10. brake rope; 11. buffer block; 12. controller; 13. first friction-increasing protrusion; 14. second friction-increasing protrusion; 15. buffer cavity; 16. buffer groove; 17. sliding block; 18. spring; 19. guide rod; 20. buffer protrusion. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Example: See Figures 1 to 5 According to an embodiment of the utility model, a technical solution is provided: an elevator car stall detection device, comprising a base 1 and two support parts 2 arranged on the base 1 and spaced apart from each other, a rotating rod 3 is rotatably provided between the two support parts 2, a steel rope 4 is sleeved on the rotating rod 3, a speed sensor 5 is provided on the support part 2, and also comprises a turntable 6, which is arranged on the support part 2, and the turntable 6 is fixedly connected to the rotating rod 3; a lock hook 7, which is arranged on the peripheral side of the turntable 6; and an electric telescopic rod 9, which is arranged on the base 1, and a lock buckle 8 is provided on the output end of the electric telescopic rod 9, and the lock buckle 8 is connected to the brake rope 10, and the free end of the brake rope 10 is connected to a buffer block 11, and the buffer block 11 is arranged on the base 1, and the electric telescopic rod 9 is connected to the speed sensor 5 signal through a controller 12.

[0024] With the elevator car stall detection device of the above structure, when the car stalls, the speed sensor 5 will sense that the speed of the rotating rod 3 exceeds a predetermined threshold value. At this time, the controller 12 will control the electric telescopic rod 9 to lift the lock buckle 8 and buckle the lock hook 7. Subsequently, the brake rope 10 will be driven by the turntable 6 to straighten the car to force the car to brake and prevent the car from falling.

[0025] In this embodiment, a plurality of first friction-increasing protrusions 13 are provided at intervals inside the lock buckle 8; when the lock hook 7 hooks the lock buckle 8, the first friction-increasing protrusions 13 inside the lock buckle 8 will increase the friction between the lock hook 7 and the lock buckle 8 to prevent the lock hook 7 from detaching from the lock buckle 8.

[0026] In this embodiment, a plurality of second friction-increasing protrusions 14 are provided at intervals on the lock hook 7; when the lock hook 7 hooks the lock buckle 8, the second friction-increasing protrusions 14 on the lock hook 7 increase the friction between the lock hook 7 and the lock buckle 8 to prevent the lock hook 7 from detaching from the lock buckle 8.

[0027] In this embodiment, a buffer cavity 15 is defined inside the base 1, and a buffer groove 16 connected to the buffer cavity 15 is provided on the base 1 along the length direction of the buffer cavity 15. A sliding block 17 is slidably provided in the buffer cavity 15, and the sliding block 17 is fixed to the buffer block 11. A spring 18 is provided in the buffer cavity 15, and the spring 18 elastically abuts against the sliding block 17; when the car triggers the emergency brake, the brake rope 10 will be entangled by the turntable 6. At this time, the free end of the brake rope 10 will pull the buffer block 11, and the buffer block 11 will drive the sliding block 17 to move along the length direction of the sliding groove. At this time, the spring 18 will elastically abut against the sliding block 17 to slow down the moving speed of the sliding block 17 to prevent the brake rope 10 from being directly stretched and hard braked, causing the brake rope 10 to break.

[0028] In this embodiment, a guide rod 19 is fixed in the buffer cavity 15 , and the guide rod 19 movably passes through the sliding block 17 ; when the sliding block 17 moves, the guide rod 19 increases the stability of the sliding block 17 during movement.

[0029] In this embodiment, a buffer protrusion 20 is provided in the buffer cavity 15, and the buffer protrusion 20 is arranged at an end away from the sliding block 17; when the car falls too fast and the force of the sliding block 17 moving exceeds the energy absorption threshold of the spring 18, the buffer protrusion 20 will slow down the impact force of the sliding block 17 when contacting the sliding block 17.

[0030] Working principle: When the car stalls, the speed sensor 5 will sense that the speed of the rotating rod 3 exceeds the predetermined threshold. At this time, the controller 12 will control the electric telescopic rod 9 to lift the lock buckle 8 and buckle the lock hook 7. When the lock hook 7 hooks the lock buckle 8, the first friction-increasing protrusion 13 inside the lock buckle 8 will increase the friction between the lock hook 7 and the lock buckle 8. At the same time, the second friction-increasing protrusion 14 on the lock hook 7 will also increase the friction between the lock hook 7 and the lock buckle 8 to prevent the lock hook 7 from detaching from the lock buckle 8. Subsequently, the brake rope 10 will be driven by the turntable 6 to straighten the car to force the car to brake and prevent the car from falling. When the car triggers the emergency brake, The brake rope 10 will be entangled by the turntable 6. At this time, the free end of the brake rope 10 will pull the buffer block 11, and the buffer block 11 will drive the sliding block 17 to move along the length direction of the sliding groove. At this time, the spring 18 will elastically abut the sliding block 17 to slow down the movement speed of the sliding block 17 and prevent the brake rope 10 from being directly stretched and hard braked, causing the brake rope 10 to break; when the sliding block 17 moves, the guide rod 19 will increase the stability of the sliding block 17 during movement; when the car falls too fast and the force of the sliding block 17 moving exceeds the energy absorption threshold of the spring 18, the buffer protrusion 20 will slow down the impact force of the sliding block 17 when it contacts the sliding block 17.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An elevator car stall detection device, comprising a base (1) and two support parts (2) arranged on the base (1) and spaced apart from each other, a rotating rod (3) rotatably arranged between the two support parts (2), a steel rope (4) sleeved on the rotating rod (3), a rotation speed sensor (5) arranged on the support part (2), characterized in that: Also includes: A rotating disk (6) is arranged on the supporting portion (2), and the rotating disk (6) is fixedly connected to the rotating rod (3); A locking hook (7) disposed on the peripheral side of the rotating disk (6); and an electric telescopic rod (9) which is arranged on the base (1); a lock buckle (8) is arranged on the output end of the electric telescopic rod (9); the lock buckle (8) is connected to a brake rope (10); the free end of the brake rope (10) is connected to a buffer block (11); the buffer block (11) is arranged on the base (1); the electric telescopic rod (9) is connected to the rotation speed sensor (5) signal through a controller (12).

2. An elevator car stall detection device according to claim 1, characterized in that: A plurality of first friction-increasing protrusions (13) are arranged at intervals inside the lock buckle (8).

3. An elevator car stall detection device according to claim 1, characterized in that: A plurality of second friction-increasing protrusions (14) are arranged at intervals on the lock hook (7).

4. An elevator car stall detection device according to claim 1, characterized in that: A buffer cavity (15) is defined inside the base (1); a buffer groove (16) connected to the buffer cavity (15) is provided on the base (1) along the length direction of the buffer cavity (15); a sliding block (17) is slidably provided in the buffer cavity (15); the sliding block (17) is fixed to the buffer block (11); a spring (18) is provided in the buffer cavity (15); the spring (18) elastically abuts against the sliding block (17).

5. An elevator car stall detection device according to claim 4, characterized in that: A guide rod (19) is fixed in the buffer cavity (15), and the guide rod (19) movably passes through the sliding block (17).

6. An elevator car stall detection device according to claim 4, characterized in that: A buffer protrusion (20) is provided in the buffer cavity (15), and the buffer protrusion (20) is arranged at an end away from the sliding block (17).

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