Anti-skid elevator safety tongs for elevator braking safety and using method of anti-skid elevator safety tongs

Abstract

The invention relates to the technical field of elevator safety tongs, and particularly discloses an anti-skid elevator safety tongs for elevator braking safety and a using method thereof.The anti-skid elevator safety tongs for elevator braking safety comprise a device outer shell of a square hollow structure, and the device outer shell and an elevator car are fixedly installed through a fixing plate fixedly installed on the side face of the device outer shell; a receding groove is formed in the middle of the device outer shell, the receding groove corresponds to an elevator guide rail installed in an elevator shaft, and an acceleration sensor used for detecting out-of-control falling of an elevator is fixedly installed on the inner wall of the device outer shell. According to the antiskid elevator safety tongs for elevator braking safety and the using method thereof, a second air bag is extruded through an extrusion ball, air in the second air bag enters a first air bag through a connecting hose, at the moment, the first air bag expands and pushes a mounting plate, extrusion between the mounting plate and an elevator guide rail is increased, and therefore the contact friction force is increased; and the condition of slipping caused by overlarge acceleration is prevented.

Description

Technical Field

[0001] The invention relates to the technical field of elevator safety clamps, in particular to an anti-skid elevator safety clamp for elevator braking safety and a use method thereof. Background Art

[0002] Elevator safety clamps, also known as elevator safety clamps or safety devices, are vital safety components in elevator systems. Their main function is to immediately prevent the elevator from sliding freely when an elevator malfunctions, such as overspeed descent or failure of the support system, to ensure the safety of passengers; The elevator safety clamp mainly achieves the purpose of braking through the squeezing friction between the elevator guide rails to prevent the elevator from continuing to descend.

[0003] As in the prior art, a Chinese patent with publication number CN108584610A discloses an elevator safety clamp, which includes a safety clamp seat, an operating rod, a main clamp block, a secondary clamp block, and a guide ball; two secondary clamp blocks are symmetrically arranged in the safety clamp seat, so that the two sides of the elevator guide rail passing through the safety clamp seat are respectively in contact with the two secondary clamp blocks; two main clamp blocks are symmetrically arranged on both sides of the safety clamp seat; guide balls are arranged between the main clamp block and the secondary clamp block, a side of the main clamp block facing the secondary clamp block is a main inclined surface, and a side of the secondary clamp block facing the main clamp block is a secondary inclined surface, and the main inclined surface is arranged parallel to the secondary inclined surface; a side of the secondary clamp block facing the elevator guide rail is a vertical plane parallel to the guide rail, and a damping layer is arranged on the vertical plane; an operating rod is arranged on the secondary clamp block.

[0004] As another example in the prior art, a Chinese patent with publication number CN115872254A discloses an elevator safety clamp, including a support frame, a U-shaped spring, a first guide, a second guide, a first wedge, a second wedge and a connecting plate. The U-shaped spring is arranged in the support frame, and the first guide and the second guide are symmetrically installed in the U-shaped spring respectively, and the first guide and the second guide are arranged in an "eight" shape. The first guide and the second guide are both provided with positioning pins, and one end of the positioning pin passes through the U-shaped spring and the support frame in turn and is threadedly connected to the adjusting nut. The first wedge and the second wedge are respectively slidably installed on the first guide and the second guide, and a guide position is formed between the first wedge and the second wedge, and the guide rail of the elevator cooperates with the guide position. The first wedge and the second wedge are respectively movably connected to the connecting plate, and the connecting plate is connected to the action end of the speed limiter of the elevator.

[0005] Based on the above materials, it can be known that in the prior art, the purpose of extrusion braking is generally achieved through the cooperation between the wedge block and the friction block. However, in actual use, the general device only has one set of friction blocks. Only one set of friction blocks may slip due to insufficient braking force during operation, thereby affecting the safety of the elevator. Summary of the invention

[0006] The object of the present invention is to provide an anti-skid elevator safety clamp for elevator braking safety and a method of using the same, so as to solve the problem of slippage caused by insufficient braking force in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solution: an anti-skid elevator safety clamp for elevator braking safety and a method of using the same, comprising a device outer shell in a square hollow structure, the device outer shell being fixedly installed between the elevator car through a fixing plate fixedly installed on the side thereof, and further comprising: An avoidance groove is provided in the middle of the outer shell of the device, and the avoidance groove corresponds to the elevator guide rail installed inside the elevator shaft, and an acceleration sensor for detecting an uncontrolled fall of the elevator is fixedly installed on the inner wall of the outer shell of the device; Guide blocks are fixedly installed on the left and right sides of the outer shell of the device, and extrusion blocks matching with them are fitted on the sides of the guide blocks. The contact surfaces of the extrusion blocks and the guide blocks are both arranged in an inclined structure. A telescopic cylinder is fixedly installed on the lower surface of the inner shell of the device, and an adsorption magnet for adsorbing the extrusion block is fixedly installed on the top of the telescopic cylinder; A corresponding mounting plate is installed on the side of the extrusion block, and rubber friction strips evenly distributed at equal intervals are fixedly installed on the outer surface of the mounting plate, and a pushing mechanism for maintaining the extrusion force is arranged between the mounting plate and the extrusion block; A storage box is fixedly installed inside the outer shell of the device, and carbon powder for improving friction is stored inside the storage box.

[0008] Preferably, a limiting slider is fixedly installed on the outer surface of the extrusion block, and the limiting slider and a limiting sliding groove provided on the outer surface of the guide block are slidably connected to each other.

[0009] Preferably, the pushing mechanism includes a first airbag fixedly installed between the extrusion block and the guide block and a second airbag fixedly installed outside the side of the extrusion block.

[0010] Preferably, the first airbag and the second airbag are connected to each other through a connecting hose, and the second airbag and a squeezing ball fixedly mounted on the outer surface of the guide block correspond to and squeeze each other.

[0011] Preferably, mounting holes are provided at four corners of the outer surface of the extrusion block, and the mounting holes correspond to mounting columns fixedly mounted on the back of the mounting plate.

[0012] Preferably, two friction rollers with rough surfaces are symmetrically installed below the outer shell of the device, and a connecting rod rotatably connected to the lower surface of the outer shell of the device is fixedly installed on the side of the friction roller.

[0013] Preferably, a return spring is fixedly installed between the upper surface of the connecting rod and the lower surface of the device outer shell, and a pulling rod is rotatably installed on the upper surface of the front end of the connecting rod, and a mounting rod is rotatably installed on the upper end of the pulling rod, and the upper end of the mounting rod is fixedly connected to the telescopic end of the telescopic cylinder.

[0014] Preferably, a coating nozzle is fixedly mounted on the rear side wall inside the outer shell of the device, and the position of the coating nozzle corresponds to the position of the mounting plate, and the coating nozzle is connected to the storage box through a delivery pipe.

[0015] Preferably, a stirring rod for stirring and rubbing the carbon powder is rotatably installed inside the storage box, and the stirring rod and the friction roller are coaxially fixedly installed, and the outer surface of the friction roller is in contact with the elevator guide rail for friction.

[0016] Preferably, a method for using an anti-skid elevator safety pliers for elevator braking safety is characterized by comprising the following steps: S1. Use a fixing plate to fix the outer shell of the device on the outside of the elevator car. At this time, the elevator guide rail is embedded in the avoidance groove opened in the outer shell of the device; S2. When the elevator fails and falls uncontrollably, the acceleration sensor detects this phenomenon and controls the telescopic cylinder through the computer board, so that the telescopic cylinder pushes the extrusion plate upward. Under the action of the inclined surface, the two extrusion plates are brought close to each other to achieve extrusion friction on the elevator guide rail 3, thereby achieving the purpose of braking; S3, after the squeezing block moves upward, the squeezing ball is used to squeeze the second airbag, so that the air in the second airbag is transported to the first airbag through the connecting hose. At this time, the first airbag expands and pushes the mounting plate to ensure the squeezing force between the mounting plate and the elevator guide rail; S4, the telescopic cylinder extends and drives the installation rod to move synchronously, and then the friction roller is pulled close to and squeezes the elevator guide rail under the action of the pulling rod and the connecting rod to achieve the purpose of secondary braking; S5. The coating nozzle regularly sprays the carbon powder in the storage box onto the surface of the mounting plate through the delivery pipe to increase its friction and prevent slipping.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the anti-skid elevator safety clamp for elevator braking safety and the use method thereof adopt a new structural design, and the specific contents are as follows: 1. Use the acceleration sensor to detect the uncontrolled fall of the elevator. When this happens, open the telescopic cylinder, and use the telescopic cylinder to push the extrusion block upward. Under the cooperation of the inclined surfaces of the extrusion block and the guide block, the two extrusion blocks are brought closer to each other, and finally the friction strip outside the mounting plate is used to rub the elevator guide rail to achieve the purpose of braking; Furthermore, after the extrusion block moves upward, the second airbag on the outside of its side moves to a position corresponding to the extrusion ball. At this time, the extrusion ball is used to squeeze the second airbag, so that the air in the second airbag enters the first airbag through the connecting hose. At this time, the first airbag expands and pushes the mounting plate, increasing the extrusion between the mounting plate and the elevator guide rail, thereby increasing the contact friction and preventing slipping due to excessive acceleration.

[0018] 2. When the telescopic cylinder is extended, it drives the mounting rod to move upward synchronously. At this time, the mounting rod drives the pull rod at its lower end to rotate, and the pull rod drives the connecting rod to rotate upward, so that the friction roller at the bottom of the connecting rod moves to the position of squeezing the outer surface of the elevator guide rail. The friction roller provides friction again to achieve the purpose of secondary braking and ensure the overall braking effect of the device.

[0019] 3. Regularly apply the nozzle to spray the carbon ink in the storage box to the surface of the mounting plate through the delivery pipe, and use the carbon powder to increase its friction. When the device is running, the elevator guide rail is used to drive the friction roller to rotate, so that the friction roller drives the stirring to stir the carbon powder in the storage box, increase the static electricity on the surface of the carbon powder, and make it better adsorbed on the surface of the mounting plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the decomposed structure of the guide block and the extrusion block of the present invention; Figure 3 This is a schematic diagram of the exploded structure of the extrusion block and the mounting plate of the present invention; Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle; Figure 5 It is a schematic diagram of the bottom surface structure of the outer shell of the device of the present invention; Figure 6 For the present invention Figure 5 The enlarged structural diagram at B in the middle; Figure 7 This is a schematic diagram of the back structure of the outer shell of the device of the present invention; Figure 8 It is a schematic diagram of the cross-sectional structure of the outer shell of the device of the present invention; Fig. 9 This is a schematic diagram of the position relationship between the guide rail and the friction roller of the elevator of the present invention; Fig.10 It is a schematic diagram of the cross-sectional structure of the storage box of the present invention.

[0021] In the figure: 1. device outer shell; 101. fixing plate; 2. avoidance groove; 3. elevator guide rail; 4. acceleration sensor; 5. guide block; 6. extrusion block; 7. telescopic cylinder; 8. adsorption magnet; 9. limit slider; 10. limit slide groove; 11. mounting plate; 12. friction strip; 13. first air bag; 14. second air bag; 15. connecting hose; 16. extrusion ball; 17. mounting column; 18. mounting hole; 19. friction roller; 20. connecting rod; 21. reset spring; 22. pulling rod; 23. mounting rod; 24. storage box; 25. coating nozzle; 26. delivery pipe; 27. stirring rod; 28. friction roller. DETAILED DESCRIPTION

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

[0023] Example 1: Please refer to Figure 1-Figure 4In order to solve the problem that the traditional device slips during braking due to excessive acceleration, the present embodiment provides the following technical solutions, which utilize a pushing mechanism to increase the squeezing force between the mounting plate 11 and the elevator guide rail 3 to enhance the friction braking effect. Specifically disclosed is: a device outer shell 1 with a square hollow structure, the device outer shell 1 is fixedly installed with the elevator car through a fixing plate 101 fixedly installed on its side, an avoidance groove 2 is provided in the middle of the device outer shell 1, and the avoidance groove 2 corresponds to the elevator guide rail 3 installed inside the elevator shaft, and an acceleration sensor 4 for detecting the uncontrolled falling of the elevator is fixedly installed on the inner wall of the device outer shell 1, guide blocks 5 are fixedly installed on the left and right sides of the device outer shell 1, and a matching squeezing block 6 is fitted on the side of the guide block 5, and the contact surface of the squeezing block 6 and the guide block 5 are both set to an inclined structure, and a telescopic cylinder 7 is fixedly installed on the lower surface of the inner shell 1 of the device, and a telescopic cylinder 7 is fixedly installed on the top of the telescopic cylinder 7 for suction An adsorption magnet 8 is attached to the extrusion block 6, a corresponding mounting plate 11 is installed on the side of the extrusion block 6, and a rubber friction strip 12 is fixedly installed on the outer surface of the mounting plate 11 with equal intervals and uniform distribution, and a pushing mechanism for maintaining the extrusion force is arranged between the mounting plate 11 and the extrusion block 6, the pushing mechanism includes a first air bag 13 fixedly installed between the extrusion block 6 and the guide block 5 and a second air bag 14 fixedly installed on the outside of the side of the extrusion block 6, the first air bag 13 and the second air bag 14 are connected to each other through a connecting hose 15, and the second air bag 14 corresponds to and squeezes the extrusion ball 16 fixedly installed on the outer surface of the guide block 5, the four corners of the outer surface of the extrusion block 6 are provided with mounting holes 18, and the mounting holes 18 correspond to the mounting columns 17 fixedly installed on the back of the mounting plate 11, the outer surface of the extrusion block 6 is fixedly installed with a limiting slider 9, and the limiting slider 9 is slidably connected to the limiting slide groove 10 opened on the outer surface of the guide block 5.

[0024] When using the device, first use the fixing plate 101 to fix the device outer shell 1 on the outside of the elevator car. Then, when the elevator is operating normally, the elevator guide rail 3 slides in the avoidance groove 2 accordingly without generating friction. When the elevator falls out of control, the acceleration sensor 4 detects this situation and turns on the telescopic cylinder 7 through the central control computer. At this time, the telescopic cylinder 7 pushes the extrusion block 6 to move upward (in normal use, the telescopic cylinder 7 contracts and drives the extrusion block 6 to move downward under the adsorption effect of the adsorption magnet 8). The extrusion block 6 moves upward relative to the guide block 5 by sliding between the external limit slider 9 and the limit slide groove 10. The cooperation of the inclined surfaces between the two makes the extrusion block 6 move upward relative to the guide block 5. The block 6 moves toward the middle, and finally the friction strip 12 on the outer surface of the mounting plate 11 contacts and rubs and squeezes the elevator guide rail 3, so as to achieve the purpose of braking. When the squeezing block 6 moves upward, the second airbag 14 on the outer side thereof moves to the position corresponding to the squeezing ball 16. At this time, the squeezing ball 16 is used to squeeze the second airbag 14. The air inside the second airbag 14 is squeezed and enters the first airbag 13 through the connecting hose 15, so that the first airbag 13 expands and pushes the mounting plate 11 (the mounting plate 11 is limited by the cooperation between the mounting column 17 and the mounting hole 18), thereby increasing the squeezing friction between the mounting plate 11 and the elevator guide rail 3 and avoiding slipping.

[0025] Example 2: Please refer to Figure 5-Figure 6 In order to achieve a better braking effect, the present embodiment provides the following technical solution, which utilizes the friction roller 19 to perform secondary braking on the elevator, thereby ensuring its braking effect. Specifically, it discloses: two friction rollers 19 with rough surfaces are symmetrically installed below the outer shell 1 of the device, and a connecting rod 20 rotatably connected to the lower surface of the outer shell 1 of the device is fixedly installed on the side of the friction roller 19, a return spring 21 is fixedly installed between the upper surface of the connecting rod 20 and the lower surface of the outer shell 1 of the device, and a pulling rod 22 is rotatably installed on the upper surface of the front end of the connecting rod 20, and a mounting rod 23 is rotatably installed on the upper end of the pulling rod 22, and the upper end of the mounting rod 23 is fixedly connected to the telescopic end of the telescopic cylinder 7.

[0026] When the telescopic cylinder 7 is extended, its telescopic end drives the mounting rod 23 to move upward synchronously. At this time, the mounting rod 23 drives the pulling rod 22 to rotate, and the connecting rod 20 is driven to rotate upward under the pulling action of the pulling rod 22 (under normal circumstances, the position of the connecting rod 20 is maintained under the pushing action of the return spring 21). The connecting rod 20 rotates upward to make the friction roller 19 approach and squeeze the elevator guide rail 3, and the friction force is used to achieve the purpose of secondary braking.

[0027] Example 3: Please refer to Figure 7-Figure 10In order to solve the problem of reduced friction on the friction block surface, the present embodiment provides the following technical solutions, which ensure the surface friction by increasing carbon powder. Specifically, a storage box 24 is fixedly installed inside the outer shell 1 of the device, and the storage box 24 stores carbon powder for increasing friction. A coating nozzle 25 is fixedly installed on the rear side wall inside the outer shell 1 of the device, and the position of the coating nozzle 25 corresponds to the position of the mounting plate 11, and the coating nozzle 25 is connected to the storage box 24 through a conveying pipe 26. A stirring rod 27 for stirring and rubbing the carbon powder is rotatably installed inside the storage box 24, and the stirring rod 27 and the friction roller 28 are coaxially fixedly installed, and the outer surface of the friction roller 28 is in contact with the elevator guide rail 3 for friction.

[0028] When the elevator is operating normally, the friction between the elevator guide rail 3 and the friction roller 28 is used to drive the stirring rod 27 to rotate, so that the stirring rod 27 is used to stir the carbon powder stored in the storage box 24, so that the carbon powder rubs against each other to generate static electricity. Then, the coating nozzle 25 is turned on regularly, and the carbon powder in the storage box 24 is sprayed onto the outer surface of the mounting plate 11 through the conveying pipe 26 by the coating nozzle 25 (carbon powder with static electricity can achieve a better adhesion effect), thereby increasing the friction on the surface of the mounting plate 11.

[0029] 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 anti-skid elevator safety clamp for elevator braking safety, comprising a device outer shell (1) in a square hollow structure, wherein the device outer shell (1) is fixedly installed on the elevator car through a fixing plate (101) fixedly installed on the side thereof, characterized in that: Also includes: An avoidance groove (2) is provided in the middle of the outer shell (1) of the device, and the avoidance groove (2) corresponds to an elevator guide rail (3) installed inside the elevator shaft, and an acceleration sensor (4) for detecting an uncontrolled fall of the elevator is fixedly installed on the inner wall of the outer shell (1) of the device; Guide blocks (5) are fixedly mounted on the left and right sides of the outer shell (1) of the device, and extrusion blocks (6) matching the guide blocks (5) are fitted on the sides of the guide blocks (5), and the contact surfaces of the extrusion blocks (6) and the guide blocks (5) are both arranged in an inclined structure. A telescopic cylinder (7) is fixedly mounted on the lower surface of the inner shell (1) of the device, and an adsorption magnet (8) for adsorbing the extrusion block (6) is fixedly mounted on the top of the telescopic cylinder (7); A mounting plate (11) corresponding to the extrusion block (6) is mounted on a side surface thereof, and rubber friction strips (12) evenly distributed at equal intervals are fixedly mounted on the outer surface of the mounting plate (11), and a pushing mechanism for maintaining the extrusion force is provided between the mounting plate (11) and the extrusion block (6); A storage box (24) is fixedly installed inside the outer shell (1) of the device, and carbon powder for improving friction is stored inside the storage box (24).

2. The anti-skid elevator safety clamp for elevator braking safety according to claim 1, characterized in that: A limiting slide block (9) is fixedly mounted on the outer surface of the extrusion block (6), and the limiting slide block (9) is slidably connected to a limiting slide groove (10) provided on the outer surface of the guide block (5).

3. The anti-skid elevator safety clamp for elevator braking safety according to claim 1, characterized in that: The pushing mechanism comprises a first air bag (13) fixedly mounted between the extrusion block (6) and the guide block (5), and a second air bag (14) fixedly mounted outside the side of the extrusion block (6).

4. The anti-skid elevator safety pliers for elevator braking safety according to claim 3, characterized in that: The first airbag (13) and the second airbag (14) are connected to each other via a connecting hose (15), and the second airbag (14) and a squeezing ball (16) fixedly mounted on the outer surface of the guide block (5) correspond to and squeeze each other.

5. The anti-skid elevator safety clamp for elevator braking safety according to claim 4, characterized in that: The four corners of the outer surface of the extrusion block (6) are provided with mounting holes (18), and the mounting holes (18) correspond to mounting columns (17) fixedly mounted on the back of the mounting plate (11).

6. The anti-skid elevator safety clamp for elevator braking safety according to claim 1, characterized in that: Two friction rollers (19) with rough surfaces are symmetrically mounted below the outer shell (1) of the device, and a connecting rod (20) rotatably connected to the lower surface of the outer shell (1) of the device is fixedly mounted on the side of the friction roller (19).

7. The anti-skid elevator safety pliers for elevator braking safety according to claim 6, characterized in that: A return spring (21) is fixedly mounted between the upper surface of the connecting rod (20) and the lower surface of the device outer shell (1), and a pulling rod (22) is rotatably mounted on the upper surface of the front end of the connecting rod (20), and a mounting rod (23) is rotatably mounted on the upper end of the pulling rod (22), and the upper end of the mounting rod (23) is fixedly connected to the telescopic end of the telescopic cylinder (7).

8. The anti-skid elevator safety clamp for elevator braking safety according to claim 1, characterized in that: A coating nozzle (25) is fixedly mounted on the rear side wall of the device outer shell (1), and the position of the coating nozzle (25) corresponds to the position of the mounting plate (11), and the coating nozzle (25) is connected to the storage box (24) via a delivery pipe (26).

9. The anti-skid elevator safety clamp for elevator braking safety according to claim 8, characterized in that: A stirring rod (27) for stirring and rubbing the carbon powder is rotatably mounted inside the storage box (24), and the stirring rod (27) and the friction roller (28) are coaxially fixedly mounted, and the outer surface of the friction roller (28) is in contact with the elevator guide rail (3) for friction.

10. A method for using the anti-skid elevator safety clamp for elevator braking safety according to claim 1, characterized in that: The following steps are involved: S1. Using a fixing plate (101), the outer casing (1) of the device is fixedly installed outside the elevator car, and the elevator guide rail (3) is embedded in the avoidance groove (2) provided in the outer casing (1) of the device; S2. When the elevator fails and falls uncontrollably, the acceleration sensor (4) detects this phenomenon and controls the telescopic cylinder (7) through the computer board, so that the telescopic cylinder (7) pushes the extrusion plate (6) to move upward. Under the action of the inclined surface, the two extrusion plates (6) are brought closer to each other to achieve extrusion friction on the elevator guide rail 3, thereby achieving the purpose of braking; S3, after the squeezing block (6) moves upward, the squeezing ball (16) is used to squeeze the second airbag (14), so that the air in the second airbag (14) is transported to the first airbag (13) through the connecting hose (15). At this time, the first airbag (13) expands and pushes the mounting plate (11), thereby ensuring the squeezing force between the mounting plate (11) and the elevator guide rail (3); S4, the telescopic cylinder (7) extends and drives the mounting rod (23) to move synchronously, and then the friction roller (19) is pulled close to and squeezed against the elevator guide rail (3) under the action of the pulling rod (22) and the connecting rod (20), thereby achieving the purpose of secondary braking; S5. The coating nozzle (25) regularly sprays the carbon powder in the storage box (24) onto the surface of the mounting plate (11) through the delivery pipe (26) to increase the friction force and prevent slipping.

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