Safety lock for overhead cable maintenance

Abstract

The application discloses a safety lock buckle applied to overhead cable maintenance, which comprises a lock buckle body and a safety rope, one end of the safety rope is connected with the lock buckle body, the other end is used for being fixed on a working personnel, the lock buckle body comprises a lock buckle fixing part, a sliding block and two clamping parts, the lock buckle fixing part is provided with a threading hole for threading an overhead cable, the two clamping parts are arranged at the top of the threading hole in a horizontal direction, the sliding block is slidingly arranged on the lock buckle fixing part, and the sliding block is elastically connected with the lock buckle fixing part, and the bottom of the sliding block forms an abutting surface for abutting against the overhead cable. When the working personnel falls, the overhead cable moves to the position between the two clamping parts. Under the clamping action of the clamping parts, the lock buckle body is fixed at a certain position of the overhead cable. The working personnel can climb along the safety rope to the overhead cable to perform self-rescue, and the safety of high-altitude operation is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of aerial work equipment, and particularly relates to a safety lock buckle applied to overhead cable maintenance. BACKGROUND

[0002] In daily maintenance of overhead cables, for example, checking whether the overhead cables have broken strands, maintaining and replacing spacer rods, etc., the operating personnel need to move on the overhead cables. In order to ensure the safety of the operating personnel, the operating personnel need to wear safety equipment. As shown in the figure, the safety equipment mainly includes a safety lock buckle 1', a safety rope 2', and a safety belt worn on the operating personnel. The safety lock buckle 1' is hung on the overhead cable 3', one end of the safety rope 2' is connected with the safety lock buckle 1', and the other end is connected with the safety belt. When the operating personnel falls, the operating personnel can be hung on the overhead cable 3' through the safety rope 2' to ensure the safety of the personnel. Figure 1

[0003] The existing safety equipment has the following disadvantages: since the overhead cable 3' is in an overall arc shape, when the operating personnel falls, under the action of the gravity of the human body, the safety lock buckle 1' will slide towards the lowest part of the overhead cable 3'. The operating personnel is hung on the safety rope 2' and continues to slide along the length direction of the overhead cable 3', thereby causing the operating personnel to be unable to climb up to the overhead cable 3' along the safety rope 2' to perform self-rescue. SUMMARY

[0004] The purpose of the embodiment of the present application is to provide a safety lock buckle applied to overhead cable maintenance, which can fix the lock buckle body on the overhead cable when the operating personnel falls, avoid the lock buckle body from sliding along the length direction of the overhead cable, and facilitate self-rescue of the operating personnel, and is high in safety.

[0005] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0006] The present application provides a safety lock buckle applied to overhead cable maintenance, which comprises a lock buckle body and a safety rope. One end of the safety rope is connected with the lock buckle body, and the other end is used for fixing on the operating personnel. The lock buckle body comprises a lock buckle fixing part, a sliding block, and two clamping parts. The lock buckle fixing part has a threading hole for threading the overhead cable. The two clamping parts are arranged at the top of the threading hole in a horizontal direction. The sliding block is arranged on the lock buckle fixing part in a sliding mode, and the sliding block is elastically connected with the lock buckle fixing part. The bottom of the sliding block forms an abutting surface for abutting with the overhead cable.

[0007] When the force applied on the lock buckle body by the safety rope is less than a set value, the abutting surface is lower than the clamping part, and the overhead cable abuts on the abutting surface.

[0008] ​When the force applied by the safety rope on the lock body is greater than a set value, the overhead cable can push the slider to slide towards the direction away from the safety rope, and move the overhead cable between the two clamping parts, and the two clamping parts clamp the overhead cable.

[0009] Further, the clamping part is rotationally connected with the lock fixing part.

[0010] Further, the side of the clamping part facing the safety rope is provided as an arc surface.

[0011] Further, the side of the clamping part facing the safety rope is provided with a plurality of anti-skid grooves or anti-skid convex ridges.

[0012] Further, the lock body further comprises an elastic band, which is arranged below the clamping part, and when the overhead cable moves towards the clamping part, the elastic band can be wrapped around the surface of the overhead cable, and the elastic band is clamped between the overhead cable and the clamping part.

[0013] Further, the side of the clamping part facing the safety rope is provided with a plurality of grooves in a first direction, and the first direction is parallel to the length direction of the overhead cable.

[0014] Further, the lock fixing part is provided with a mounting groove above the threading hole, the groove opening of the mounting groove faces downward, the mounting groove is in communication with the threading hole, the clamping part is rotationally arranged on the groove wall of the mounting groove, the bottom end of the clamping part passes through the groove opening and extends into the threading hole.

[0015] Further, the slider is two, the two sliders are respectively located on the opposite sides of the lock fixing part, the two sliders are fixedly connected through a connecting rod, the side wall of the lock fixing part is provided with a sliding groove, the sliding groove is in communication with the mounting groove, the connecting rod is arranged in the sliding groove and is in sliding connection with the sliding groove, the groove bottom of the mounting groove is provided with a spring, one end of the spring is connected with the connecting rod arranged in the mounting groove.

[0016] Further, the lock body further comprises a lock movable part, the lock fixing part is provided with an opening for the overhead cable to pass through, the lock movable part is rotationally arranged on the lock fixing part, and the lock movable part is used to selectively block the opening.

[0017] Further, a safety belt is further included, the safety belt is worn on the working personnel, and one end of the safety rope away from the lock body is connected with the safety belt.

[0018] The beneficial effect of the present application is that two clamping portions are installed on the lock fixing portion, and a sliding block is slidably arranged on the lock fixing portion 11. In normal operation, the lock body is hung on the overhead cable, and the sliding block can block the overhead cable from contacting the clamping portion. When the worker falls, under the action of gravity, the overhead cable pushes the sliding block to move away from the safety rope, and the overhead cable moves between the two clamping portions. Under the clamping action of the clamping portion, the lock body is fixed at a certain position of the overhead cable. The worker can climb along the safety rope to the overhead cable for self-rescue, improving the safety of high-altitude operation. BRIEF DESCRIPTION OF DRAWINGS

[0019] The present application will be further described in detail below according to the drawings and embodiments.

[0020] Figure 1 It is a schematic diagram of the connection between the safety lock in the prior art and the overhead cable.

[0021] Figure 2 It is a schematic diagram of the safety lock applied to overhead cable maintenance in an embodiment of the present application.

[0022] Figure 3 It is a partial sectional view of the safety lock applied to overhead cable maintenance in an embodiment of the present application.

[0023] Figure 4 It is a schematic diagram of the clamping portion clamping the overhead cable in an embodiment of the present application.

[0024] Figure 5 It is a schematic diagram of the installation of the sliding block and the lock fixing portion in an embodiment of the present application.

[0025] Figure 6 It is a schematic diagram of the clamping portion in an embodiment of the present application.

[0026] Figure 7 It is a schematic diagram of the clamping portion in another embodiment of the present application.

[0027] Figure 1 In the present application,

[0028] 1', lock body; 2', safety rope; 3', overhead cable;

[0029] Figures 2 to 7 In the present application,

[0030] 1, lock body; 11, lock fixing portion; 110, threading hole; 111, installation slot; 112, sliding groove; 12, lock movable portion; 13, sliding block; 131, abutting surface; 14, clamping portion; 141, anti-skid convex ridge; 142, groove; 15, elastic band; 16, connecting rod; 17, spring; 2, connector; 3, safety rope; 4, overhead cable. DETAILED DESCRIPTION

[0031] In order to make the technical problems solved by the present application, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present application will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] As shown in Figures 2 to 5 The present application provides a safety lock (hereinafter referred to as safety lock) applied to overhead cable maintenance, which comprises a lock body 1 and a safety rope 3. The lock body 1 is used for detachable connection with the overhead cable 4, and enables the lock body 1 to move along the length direction of the overhead cable 4 to adapt to the movement of the operator when maintaining the overhead cable 4. One end of the safety rope 3 is connected with the lock body 1, and the other end is fixed on the operator's body. When the operator falls in the high-altitude operation, the operator can be hung on the overhead cable 4 through the safety rope 3 to ensure the safety of the operator. The lock body 1 comprises a lock fixing part 11, a sliding block 13 and two clamping parts 14. The lock fixing part 11 is in a "C" shape structure, and has a threading hole 110 inside for threading the overhead cable 4. The diameter of the threading hole 110 is larger than that of the overhead cable 4, so that the overhead cable 4 can move relative to the lock fixing part 11. The lock fixing part 11 has an opening on one side. When the lock body 1 is hung, the overhead cable 4 enters the threading hole 110 from the opening. The two clamping parts 14 are arranged in a horizontal direction and are installed on the top of the threading hole 110. The spacing between the two clamping parts 14 is matched with the diameter of the overhead cable 4, so that the overhead cable 4 can be clamped between the two clamping parts 14, and the overhead cable 4 cannot pass through the gap between the two clamping parts 14. The sliding block 13 is slidingly arranged on the lock fixing part 11, and is elastically connected with the lock fixing part 11. The bottom of the sliding block 13 forms an abutting surface 131 for abutting with the overhead cable 4.

[0033] In this embodiment, the orientation of the locking body 1 is described with reference to the state when the locking body 1 is hung on the overhead cable 4. When the locking body 1 is hung on the overhead cable 4, the overhead cable 4 is located at the top of the threading hole 110 under its own gravity, and the safety rope 3 is located at the bottom of the locking body 1. Correspondingly, the clamping portion 14 and the sliding block 13 are both arranged at the top of the locking fixing portion 11, and are located above the overhead cable 4. Under the action of its own gravity, the safety rope 3 will be pulled by the worker during movement, so that the safety rope 3 will exert a force on the locking body 1. When the force exerted by the safety rope 3 on the locking body 1 is less than a set value, the abutting surface 131 is lower than the clamping portion 14, so that the overhead cable 4 abuts against the abutting surface 131 of the sliding block 13. When the force exerted by the safety rope 3 on the locking body 1 is greater than the set value, the overhead cable 4 can push the sliding block 13 to slide away from the safety rope 3, and move the overhead cable 4 to between the two clamping portions 14, and the two clamping portions 14 clamp the overhead cable 4. It should be noted that the set value is set according to the weight of the worker. The set value needs to be greater than the sum of the weight of the locking body 1, the safety rope 3 and the pulling force when the worker pulls the locking body 1 to move along the overhead cable 4 during work. At the same time, the set value needs to be less than the weight of the worker when falling. The purpose is that when the worker does not fall, the force acting on the locking body 1 is small, the sliding block 13 cannot be pushed to slide, so that the overhead cable 4 can only abut against the abutting surface 131 of the sliding block 13; when the worker falls, the force acting on the locking body 1 is large, the sliding block 13 can be pushed to slide, so that the overhead cable 4 can move to between the two clamping portions 14 and be clamped by the two clamping portions 14. It can be understood that by installing two clamping portions 14 on the locking fixing portion 11 and slidingly arranging the sliding block 13 on the locking fixing portion 11, when the worker falls, the body weight causes the overhead cable 4 to be clamped between the two clamping portions 14, avoiding the whole locking body 1 to slide along the length direction of the overhead cable 4, so that the worker can climb the overhead cable 4 along the safety rope 3 to perform self-rescue.

[0034] Specifically, the safety lock further includes a connector 2 and a safety belt. The connector 2 includes two rotationally connected connecting portions, one of which is fixedly installed at the bottom end of the locking fixing portion 11, and the other of which is fixedly connected with one end of the safety rope 3. The two connecting portions in the connector 2 are rotated relative to each other to avoid twisting and winding of the safety rope 3 during use. The safety belt is worn on the worker's body, and the end of the safety rope 3 away from the locking body 1 is connected with the safety belt.

[0035] Specifically, the lock body 1 also includes a lock movable part 12. An opening for the passage of the overhead cable 4 is provided on one side of the lock fixing part 11, and the lock movable part 12 is provided on the lock fixing part 11. One end of the lock movable part 12 is rotatably connected to the lock fixing part 11 at a position close to the opening, and the other end of the lock movable part 12 extends toward the side of the opening away from the lock movable part 12, and the end of the lock movable part 12 overlaps the inner wall of the threading hole 110. A torsion spring is also provided between the lock movable part 12 and the lock fixing part 11. Driven by the elastic force of the torsion spring, the end of the lock movable part 12 always remains against the inner wall of the threading hole 110, and the lock movable part 12 blocks the opening. At this time, the threading hole 110 is in a closed state. When the lock body 1 is hung, the overhead cable 4 enters the threading hole 110 from the opening. During this process, the overhead cable 4 pushes the lock movable part 12 to rotate toward the inside of the threading hole 110 ( Figure 2 The direction of the middle arrow is the rotation direction of the locking movable portion 12. When the overhead cable 4 enters the threading hole 110, the locking movable portion 12 returns to its initial state.

[0036] Specifically, the cross-section of the clamping portion 14 is fan-shaped. One end of the clamping portion 14 is rotatably connected to the lock fixing portion 11 so that the clamping portion 14 can rotate relative to the lock fixing portion 11. In the free state, the end of the clamping portion 14 having the arc surface faces downward. It can also be understood that the side of the clamping portion 14 facing the safety rope 3 is set as an arc surface. This structure makes the gap between the two clamping portions 14 have a shape that is larger at the bottom and smaller at the top, which is conducive to the overhead cable 4 entering the gap between the two clamping portions 14. By rotating the clamping portion 14, the overhead cable 4 can drive the clamping portion 14 to rotate after contacting the arc surface of the clamping portion 14, which is more conducive to the movement of the overhead cable 4 toward the two clamping portions 14.

[0037] Specifically, the lock body 1 also includes an elastic band 15. The elastic band 15 has good elasticity and is a thin sheet made of materials such as rubber and silicone. The elastic band 15 is arranged below the clamping portion 14 and close to the bottom of the clamping portion 14. The two ends of the elastic band 15 are respectively connected to the two opposite inner walls of the threading hole 110. When the overhead cable 4 moves toward the clamping portion 14, the elastic band 15 can be wrapped around the surface of the overhead cable 4 and the elastic band 15 is clamped between the overhead cable 4 and the clamping portion 14. It can be understood that the function of the elastic band 15 is to maximize the friction between the overhead cable 4 and the clamping portion 14. Since the elastic band 15 is wrapped around the surface of the overhead cable 4, the elastic band 15 can fill the gap between the overhead cable 4 and the clamping portion 14 to promote the clamping of the overhead cable 4, thereby preventing the lock body 1 from sliding along the length direction of the overhead cable 4.

[0038] Specifically, refer to Figure 2 and Figure 5As shown, the locking buckle fixing portion 11 is provided with a mounting groove 111 located above the threading hole 110. It can also be understood that the mounting groove 111 is opened on the top inner wall of the threading hole 110, and the slot of the mounting groove 111 is downward to communicate the mounting groove 111 with the threading hole 110. The clamping portion 14 is rotationally connected with the slot wall of the mounting groove 111 through a rotating shaft. The clamping portion 14 is located at a position close to the slot of the mounting groove 111, and the bottom end of the clamping portion 14 passes through the slot and extends into the threading hole 110, so that the aerial cable 4 enters the gap between the two clamping portions 14.

[0039] The slider 13 is provided with two, and the two sliders 13 are respectively located on the opposite sides of the locking buckle fixing portion 11. Specifically, the two sliders 13 are respectively located on the two sides of the thickness direction of the locking buckle fixing portion 11. The two side walls of the locking buckle fixing portion 11 in the thickness direction are provided with sliding grooves 112 which communicate with the mounting groove 111. The two sliders 13 are symmetrically arranged and fixed by a connecting rod 16. The connecting rod 16 is provided in the sliding groove 112 and the mounting groove 111. The connecting rod 16 is slidingly connected with the sliding groove 112, so that the slider 13 is slidingly connected with the locking buckle fixing portion 11 through the connecting rod 16. A spring 17 is arranged in the mounting groove 111, one end of the spring 17 is fixed on the groove bottom of the mounting groove 111, and the other end is fixedly connected with the connecting rod 16 in the mounting groove 111, so as to realize the elastic connection of the slider 13 with the locking buckle fixing portion 11 through the connecting rod 16 and the spring 17. When the force applied by the safety rope 3 on the locking buckle body 1 is less than the set value, the aerial cable 4 cannot push the slider 13 to move, that is, the spring 17 cannot be compressed and deformed. When the force applied by the safety rope 3 on the locking buckle body 1 is greater than the set value, the aerial cable 4 can push the slider 13 to move, that is, the spring 17 can be compressed and deformed.

[0040] Specifically, the abutting surface 131 of the slider 13 is arc-shaped. This structure enables the aerial cable 4 to abut against the middle position of the slider 13, and enables the aerial cable 4 to be closer to the gap between the two clamping portions 14. When the worker falls, the aerial cable 4 can quickly and accurately enter between the two clamping portions 14.

[0041] In one embodiment, referring to Figure 6 As shown, the side of the clamping portion 14 facing the safety rope 3 (i.e. the bottom end of the clamping portion 14) is provided with a plurality of anti-skid grooves or anti-skid convex ridges 141 at intervals, so as to increase the surface friction. By providing the anti-skid grooves or anti-skid convex ridges 141, it is beneficial to make the aerial cable 4 be clamped by the two clamping portions 14.

[0042] In another embodiment, referring to Figure 7As shown, the clamping portion 14 is provided with a plurality of grooves 142 on the side facing the safety rope 3, the plurality of grooves 142 are arranged in a first direction, and the first direction is parallel to the length direction of the overhead cable 4. By arranging the grooves 142, the bottom of the clamping portion 14 can form more gaps for accommodating the elastic band 15. When the overhead cable 4 is clamped between the two clamping portions 14, the elastic band 15 will be squeezed into the grooves 142, which is beneficial to increase the friction and ensure that the overhead cable 4 is clamped between the two clamping portions 14.

[0043] In this embodiment, the working principle of the safety lock is as follows: during normal operation, the operator hangs the lock body 1 on the overhead cable 4, and the overhead cable 4 abuts against the abutting surface 131 of the sliding block 13. When the operator falls, the operator is suspended on the overhead cable 4 through the safety rope 3. Under the action of the body weight, the lock body 1 moves downward relative to the overhead cable 4. At this time, the overhead cable 4 moves upward relative to the lock body 1. The overhead cable 4 drives the sliding block 13 to move upward and compresses the spring 17, the overhead cable 4 moves between the two clamping portions 14 and is clamped by the two clamping portions 14. Under the clamping action of the clamping portion 14, the entire lock body 1 can be prevented from sliding along the length direction of the overhead cable 4. The operator can climb upward along the safety rope 3 to the overhead cable 4 to perform self-rescue, thereby improving the safety of high-altitude operation.

[0044] The above is only the preferred embodiment of the present application. For those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed, and the content of the description should not be understood as the limitation of the present application.

Claims

1. A safety catch for use in the maintenance of overhead cables, characterised in that, The utility model provides a locking body and a safety rope, one end of the safety rope is connected with the locking body, the other end is used for fixing on the body of operating personnel, the locking body includes a locking fixed part, a sliding block and two clamping parts, the clamping part is rotatably connected with the locking fixed part, the locking fixed part has a threading hole for threading overhead cable, two clamping parts are arranged in the horizontal direction and are spaced apart on the top of the threading hole, the sliding block is slidably arranged on the locking fixed part, and the sliding block is elastically connected with the locking fixed part, the bottom of the sliding block forms an abutting surface for abutting with the overhead cable. When the force applied by the safety rope on the locking body is less than a set value, the abutting surface is lower than the clamping part, and the overhead cable abuts on the abutting surface. When the force applied by the safety rope on the locking body is greater than a set value, the overhead cable can push the sliding block to slide in a direction away from the safety rope, and move the overhead cable between the two clamping parts, and the two clamping parts clamp the overhead cable. The locking body further comprises an elastic band arranged below the clamping part, when the overhead cable moves towards the clamping part, the elastic band can wrap around the surface of the overhead cable, and the elastic band is clamped between the overhead cable and the clamping part. The locking fixed part is provided with a mounting groove above the threading hole, the slot opening of the mounting groove is downward, and the mounting groove is communicated with the threading hole, the clamping part is rotatably arranged on the groove wall of the mounting groove, and the bottom end of the clamping part extends into the threading hole through the slot opening. The sliding block is two, two sliding blocks are respectively located on the opposite sides of the locking fixed part, and the two sliding blocks are fixedly connected through a connecting rod, a sliding groove is arranged on the side wall of the locking fixed part, the sliding groove is communicated with the mounting groove, the connecting rod is arranged in the sliding groove and is slidably connected with the sliding groove, and a spring is arranged at the groove bottom of the mounting groove, one end of the spring is connected with the connecting rod in the mounting groove.

2. The safety catch for overhead cable maintenance according to claim 1, characterized in that, The side surface of the clamping part towards the safety rope is arranged as an arc surface.

3. The safety catch for overhead cable maintenance as claimed in claim 1, wherein, The side surface of the clamping part towards the safety rope is spaced apart and provided with a plurality of anti-skid grooves or anti-skid convex ridges.

4. The safety catch for overhead cable maintenance as claimed in claim 1, wherein, The side surface of the clamping part towards the safety rope is spaced apart and provided with a plurality of grooves in a first direction, and the first direction is parallel to the length direction of the overhead cable.

5. The safety catch for overhead cable maintenance according to any one of claims 1 to 4, characterized in that, The locking body further comprises a locking movable part, the locking fixed part is provided with an opening for the overhead cable to pass through, and the locking movable part is rotatably arranged on the locking fixed part, and the locking movable part is used for selectively plugging the opening.

6. The safety catch for overhead cable maintenance according to any one of claims 1 to 4, wherein Further comprising a safety belt, the safety rope is connected with the safety belt away from the locking body.

Images