High-altitude cable clamping tool and tensioning device

Abstract

The invention provides a wire clamping tool and a tensioning device for a high-altitude cable, and relates to the field of cable installation equipment, and the wire clamping tool comprises a lower clamping plate, a lower clamping groove is formed in one side of the rear end of the lower clamping plate, and an adjusting groove is formed in the other front end of the lower clamping plate in the front-back direction; the lower end of the upper clamping plate is rotatably connected with the rear end of the lower clamping plate, and a rotatable upper clamping groove is formed in the middle; the rear end of the driving rod is rotatably connected with the front end of the upper clamping plate, the front end of the driving rod is rotatably connected with an adjusting block, the adjusting block is arranged in the adjusting groove in a front-back sliding mode, a movable hole is formed in the adjusting block, a one-way threaded rod is further arranged in the adjusting groove, a plurality of ejector pins capable of sliding in the radial direction are arranged on the inner wall of the movable hole, and the ejector pins are connected with the adjusting block through elastic pieces. And each ejector pin is clamped into the surface of the one-way threaded rod. The cable clamping device has the beneficial effects that in the process of pulling a cable to move, the driving rod pushes the adjusting block to slide in the adjusting groove, the ejector pins slide along the surface of the one-way threaded rod and are clamped, the cable is firmly clamped, and the cable is prevented from sliding and falling off.

Description

Technical Field

[0001] The present invention relates to the technical field of cable installation equipment, and in particular to a wire clamping tool and a tensioning device for aerial cables. Background Art

[0002] In the maintenance and renovation of power facilities, the installation, maintenance, disconnection and reconnection of cables are common and important work links. When installing cables or disconnecting cables at high altitudes and needing maintenance, it is often necessary to tension two high-altitude cables to a horizontal level and bring the ends of the two cables close together for connection. However, traditional wire pulling tools have many inconveniences during adjustment and maintenance, such as difficulty in adjustment and long operation time, which seriously affect construction efficiency and safety. Specifically, the cable that is tensioned and fixed first must wait for the other cable to reach the predetermined position before it can be connected, which not only prolongs the operation time, but also increases the difficulty and complexity of the operation. In addition, when the cable is gradually tensioned from a relaxed state to near the horizontal, the clamping effect of the wire tensioner on the cable is weakened, which can easily cause slippage between the cable and the tensioner, affecting the tensioning accuracy and safety, and may even cause accidents. Summary of the invention

[0003] In view of this, in order to solve the above-mentioned problem of tensioning two high-altitude cables together for connection, an embodiment of the present invention provides a wire clamping tool and a tensioning device for high-altitude cables.

[0004] An embodiment of the present invention provides a wire clamping tool for an aerial cable, comprising: A lower clamping plate, with a lower clamping groove on one side of the rear end and an adjustment groove arranged along the front-to-back direction on the front end; An upper clamping plate, the lower end of which is rotatably connected to the rear end of the lower clamping plate, and a rotatable upper clamping groove is provided in the middle, and the upper clamping groove and the lower clamping groove are arranged opposite to each other in the upper and lower directions; And a driving rod, a rear end of which is rotatably connected to the front end of the upper clamping plate, and the front end is rotatably connected to an adjusting block, the adjusting block is slidably arranged in the adjusting groove, the adjusting block is provided with a movable hole extending in the front-to-back direction, and the adjusting groove is also provided with a one-way threaded rod penetrating the movable hole, the inner wall of the movable hole is provided with a plurality of radially slidable ejectors, the ejectors are connected to the adjusting block through an elastic member, and each of the ejectors is clamped in the surface of the one-way threaded rod, and the adjusting block slides forward along the adjusting groove so that each of the ejectors can slide forward along the surface of the one-way threaded rod and be clamped.

[0005] Furthermore, the adjustment block is provided with a mounting groove above the movable hole, the ejector pin can slidably pass through the bottom of the mounting groove and extend to the inner wall of the movable hole, the upper end of the ejector pin is connected to the adjustment block through the elastic member, and the lower end can be stuck in the surface of the one-way threaded rod.

[0006] Furthermore, a vertically slidable pressing plate is provided in the installation groove, the upper end of each ejector pin is fixedly connected to the pressing plate, and the upper surface of the pressing plate is connected to the upper part of the adjusting block through an elastic member.

[0007] Furthermore, the elastic member is a spring.

[0008] Furthermore, the bottom surface of the adjustment groove is provided with a lower sliding groove, the top surface is provided with an upper sliding groove, the lower end of the adjustment block is provided with a lower sliding block, and the upper end is provided with an upper sliding block, the lower sliding block can be slidably embedded in the lower sliding groove, and the upper sliding block can be slidably embedded in the upper sliding groove.

[0009] Furthermore, the thread profile of the surface of the one-way threaded rod is sawtooth-shaped, and the lower end of each of the ejector pins is inserted between two thread teeth of the thread.

[0010] Furthermore, the lower clamping plate is L-shaped, a lower clamping block is provided on one side of the rear end of the lower clamping plate, a lower clamping groove is provided on the upper surface of the lower clamping block, a horizontally arranged first rotating shaft is provided in the middle of the upper clamping plate, the first rotating shaft can be rotatably connected to the upper clamping block, the upper clamping block and the lower clamping block are arranged opposite to each other up and down, and an upper clamping groove is provided on the bottom of the upper clamping block.

[0011] Furthermore, it also includes a pull rod, which is rotatably connected to the adjustment block.

[0012] In addition, an embodiment of the present invention also provides a tensioning device for an aerial cable, comprising two of the above-mentioned wire clamping tools for the aerial cable, and also comprising a traction mechanism, which is used to respectively connect the two wire clamping tools to pull the two wire clamping tools toward the traction mechanism at the same time.

[0013] Furthermore, the traction mechanism includes a fixed frame, a first pull rope, a second pull rope, a pulley, a winding drum, a ratchet, a pawl and a handle, wherein the winding drum is rotatably mounted in the fixed frame, the ratchet is mounted on one side of the fixed frame and connected to the winding drum, the pawl is rotatably mounted on one side of the fixed frame and a second torsion spring is provided between the pawl and the fixed frame, the pawl is located on the rotation path of the ratchet, the handle is detachably connected to the ratchet, the first pull rope passes around the pulley and one end is connected to one end of the fixed frame and the other end is wound around the winding drum, the pulley can be connected to an adjustment block of the wire clamping tool, one end of the second pull rope is connected to the other end of the fixed frame and the other end can be connected to another adjustment block of the wire clamping tool.

[0014] The technical solution provided by the embodiment of the present invention has the following beneficial effects: 1. A wire clamping tool for aerial cables of the present invention can clamp the cable with the upper clamping groove and the lower clamping groove by pulling the upper clamping plate with a driving rod, and in the process of pulling the cable, the driving rod pushes the adjustment block to slide in the adjustment groove, and each ejector pin slides along the surface of the one-way threaded rod and is clamped, so that the cable can be firmly clamped when it is pulled, avoiding the cable from sliding and falling off during the pulling process.

[0015] 2. The present invention provides a wire clamping tool for aerial cables, wherein the upper clamping plate and the lower clamping plate are rotatably connected so that the distance between the upper clamping groove and the lower clamping groove can be adjusted, and cables of different diameters can be clamped. The position of the adjustment block can be adaptively adjusted according to the state of the upper clamping plate to ensure a good clamping effect during the cable pulling process, and the tool is suitable for clamping cables of different diameters.

[0016] 3. A tensioning device for a high-altitude cable of the present invention clamps the ends of two high-altitude cables respectively through two wire clamping tools, and then pulls the two wire clamping tools through a traction mechanism to pull the two cables to a horizontal level and drive the ends of the two cables to be relatively close, so that the ends of the two cables are in contact and connected, which can realize the connection between the two high-altitude cables, reduce the difficulty of operation, and improve the efficiency of cable installation and maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a wire clamping tool for an aerial cable of the present invention; Figure 2 is a cross-sectional schematic diagram of the regulating tank; Figure 3 It is a schematic diagram of a one-way threaded rod; Figure 4 is a schematic diagram of the traction mechanism; Figure 5 It is a working schematic diagram of a tensioning device for an aerial cable of the present invention.

[0018] In the figure: 100, line tool; 101, lower clamping plate; 102, upper clamping plate; 103, driving rod; 104, lower clamping groove; 105, upper clamping groove; 106, adjusting groove; 107, adjusting block; 108, one-way threaded rod; 109, pull rod; 110, lower clamping block; 111, upper clamping block; 112, second rotating shaft; 113, first rotating shaft; 114, third rotating shaft; 115, ejector pin; 116, elastic member; 117, mounting groove; 118, pressing plate; 119, lower sliding groove; 120, upper sliding groove; 200, traction mechanism; 201, fixing frame; 202, first pull rope; 203, second pull rope; 204, pulley; 205, ratchet; 206, stop claw; 207, handle; 208, ratchet; 209, latching tooth; 210, slot; 300, cable. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in conjunction with the accompanying drawings. The following is a preferred embodiment of the present invention, which is intended to provide a basic understanding of the present invention, but is not intended to confirm the key or decisive elements of the present invention or to limit the scope of protection.

[0020] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0021] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0022] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings. At the same time, it should be understood that for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0023] It should be further explained that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] Please refer to Figure 1 An embodiment of the present invention provides a cable clamping tool 100 for an aerial cable, comprising a lower clamping plate 101 , an upper clamping plate 102 and a driving rod 103 .

[0025] The lower clamping plate 101 has a lower clamping groove 104 on one side of the rear end and an adjustment groove 106 arranged along the front-rear direction on the other side. Specifically, the lower clamping plate 101 is approximately L-shaped, and a lower clamping block 110 is provided on one side of the rear end of the lower clamping plate 101. One side of the lower clamping block 110 is attached to and fixedly connected to the side surface of the lower clamping plate 101, and the upper surface of the lower clamping block 110 is provided with a lower clamping groove 104.

[0026] The upper clamping plate 102 has a lower end rotatably connected to the rear end of the lower clamping plate 101, and a rotatable upper clamping groove 105 is provided in the middle, and the upper clamping groove 105 is arranged opposite to the lower clamping groove 104. Specifically, the rear end of the lower clamping plate 101 is provided with a second rotating shaft 112 and is rotatably connected to the lower end of the upper clamping plate 102 through the second rotating shaft 112. The middle part of the upper clamping plate 102 is provided with a horizontally arranged first rotating shaft 113, one end of the first rotating shaft 113 is vertically connected to the upper clamping plate 102, and the other end of the first rotating shaft 113 is rotatably connected to the upper clamping block 111, and the upper clamping block 111 is arranged opposite to the lower clamping block 110, and the bottom of the upper clamping block 111 is provided with an upper clamping groove 105.

[0027] The lower clamping groove 104 and the upper clamping groove 105 are both linear clamping grooves, respectively used to clamp the lower surface and the upper surface of the cable 300. Preferably, the longitudinal cross-section of the lower clamping groove 104 and the upper clamping groove 105 are both arc-shaped or elliptical arc-shaped, which can adapt to cables 300 with a certain range of diameters.

[0028] The rear end of the driving rod 103 is rotatably connected to the front end of the upper clamping plate 102, and the front end is rotatably connected to the adjusting block 107. Here, the front end of the upper clamping plate 102 is provided with a third rotating shaft 114, and the rear end of the driving rod 103 is rotatably connected to the third rotating shaft 114. A fourth rotating shaft is provided on the side of the adjusting block 107, and the front end of the driving rod 103 is rotatably connected to the fourth rotating shaft.

[0029] Please refer to Figure 2 and 3 , the adjustment block 107 can be slidably arranged in the adjustment groove 106. Specifically, the adjustment groove 106 is a rectangular groove, the bottom surface of the adjustment groove 106 is provided with a lower sliding groove 119, the top surface is provided with an upper sliding groove 120, the lower end of the adjustment block 107 is provided with a lower slider, and the upper end is provided with an upper slider, the lower slider can be slidably embedded in the lower sliding groove 119, and the upper slider can be slidably embedded in the upper sliding groove 120. In this way, the adjustment block 107 can stably slide in the adjustment groove 106 along the front-back direction.

[0030] The adjusting block 107 is provided with a movable hole extending in the front-to-back direction, and a one-way threaded rod 108 penetrating the movable hole is further provided in the adjusting groove 106, and a plurality of radially slidable ejector pins 115 are provided on the inner wall of the movable hole, and the ejector pins 115 are connected to the adjusting block 107 through elastic members 116, and each ejector pin 115 is clamped into the surface of the one-way threaded rod 108, and the adjusting block 107 slides forward along the adjusting groove 106 so that each ejector pin 115 can slide forward along the surface of the one-way threaded rod 108 and be clamped.

[0031] Specifically, the adjustment block 107 is provided with a mounting groove 117 above the movable hole, the diameter of the movable hole is larger than the maximum diameter of the one-way threaded rod 108, and the mounting groove 117 is a closed rectangular groove. The ejector pins 115 are arranged at intervals along the front-to-back direction, and the distance between the ejector pins 115 is one or more times the pitch of the thread on the surface of the one-way threaded rod 108. The ejector pin 115 can slidably penetrate the bottom of the mounting groove 117 and extend to the inner wall of the movable hole. The upper end of the ejector pin 115 is connected to the adjustment block 107 through the elastic member 116, and the lower end can be stuck in the surface of the one-way threaded rod 108.

[0032] In some embodiments, a vertically slidable pressing plate 118 is provided in the mounting groove 117, the pressing plate 118 is arranged horizontally, each of the ejector pins 115 is arranged vertically and the upper end is fixedly connected to the pressing plate 118, the upper surface of the pressing plate 118 is connected to the upper part of the adjusting block 107 through an elastic member 116, and the spring is in a compressed state to press the pressing plate 118 upward. The elastic member 116 can be a spring. In order to ensure stable squeezing of the pressing plate 118 to move downward, the number of the elastic members 116 can be set to multiple, and each of the elastic members 116 is evenly distributed above the pressing plate 118.

[0033] In some other embodiments, the thread profile of the surface of the one-way threaded rod 108 is sawtooth-shaped, and the two threads of the thread are inclined forward relative to each other. The lower end of each ejector pin 115 is inserted between the two threads of the thread, so that the ejector pin 115 can slide forward along the threads of the thread, and the threads of the thread can prevent the ejector pin 115 from moving backward.

[0034] In some other embodiments, the cable clamping tool 100 for an aerial cable of the present invention further includes a pull rod 109, which is rotatably connected to the adjustment block 107. In order to stabilize the adjustment block 107, the pull rod 109 is U-shaped, and the pull rod 109 is rotatably connected to both ends of the fourth rotating shaft.

[0035] In addition, an embodiment of the present invention also provides a tensioning device for an aerial cable, comprising two of the above-mentioned aerial cable clamping tools 100, and also comprising a traction mechanism 200, which is used to respectively connect the two clamping tools 100 to pull the two clamping tools 100 toward the traction mechanism 200 at the same time.

[0036] The traction mechanism 200 includes a fixing frame 201 , a first pull rope 202 , a second pull rope 203 , a pulley 204 , a winding drum, a ratchet 205 , a locking claw 206 and a handle 207 .

[0037] The fixing frame 201 is in an I-shape, the winding drum is located in the fixing frame 201, and the winding drum is rotatably installed in the fixing frame 201. The ratchet 205 is installed on one side of the fixing frame 201 and connected to the winding drum, and the ratchet 205 can drive the winding drum to rotate.

[0038] The stop pawl 206 is rotatably mounted on one side of the fixing frame 201, and a second torsion spring is provided between the stop pawl 206 and the fixing frame 201. The stop pawl 206 is located on the rotation path of the ratchet 205. Here, the stop pawl 206 and the ratchet 205 are both mounted on the front side of the fixing frame 201, and the stop pawl 206 is provided with a latching tooth 209 that matches with the ratchet tooth 208 of the ratchet 205. A square plug rod bent at a right angle is provided at the end of the handle 207, and a direction slot 210 is provided in the middle of the ratchet 205. The handle 207 can be inserted into the slot 210 by the plug rod to be detachably connected with the ratchet 205. The rotation of the handle 207 can drive the ratchet 205 to rotate. Under the restriction of the latching tooth 209 of the stop pawl 206, the ratchet 205 can only rotate clockwise, thereby driving the winding drum to rotate clockwise.

[0039] The first pull rope 202 and the second pull rope 203 are generally steel wire ropes. The first pull rope 202 is passed around the pulley 204 and one end is connected to one end of the fixed frame 201, and the other end is wound on the winding drum. When the winding drum rotates clockwise, the first pull rope 202 can be wound on the winding drum. The pulley 204 can be connected to the traction end of the pull rod 109 of one of the clamping tools 100, and one end of the second pull rope 203 is connected to the other end of the fixed frame 201, and the other end can be connected to the traction end of the pull rod 109 of another clamping tool 100. Here, both ends of the fixed frame 201 are provided with rope holes for connecting the first pull rope 202 and the second pull rope 203 respectively. In addition, the traction ends are both provided with traction holes, through which the traction end of the pull rod 109 of one wire clamping tool 100 can be connected to the bracket of the pulley 204, and the traction end of the pull rod 109 of the other wire clamping tool 100 can be connected to the second pull rope 203.

[0040] like Figure 4 and 5 As shown, the tensioning device of the aerial cable can pull the two loose cables 300 overhead to a horizontal position and overlap the ends of the two cables 300, thereby performing wiring. The wiring process of the cables 300 on both sides of the wiring position is as follows: First, the traction mechanism 200 is arranged at a high position such as a utility pole or a work platform where the wire is to be connected, the pulley 204 is connected to the adjustment block 107 of one of the wire clamping tools 100, and the second pull rope 203 is connected to the adjustment block 107 of another of the wire clamping tools 100; Then, the ends of the two cables 300 are clamped by the two clamping tools 100, that is, the ends of the two cables 300 are placed between the upper clamping groove 105 and the lower clamping groove 104 of the two clamping tools 100, respectively. At this time, the cables 300 are initially clamped but not firmly clamped; Next, the handle 207 is rotated to drive the ratchet 205 to rotate, so that the first pull rope 202 is wound on the winding drum, and the first pull rope 202 drives the pulley 204 to pull one of the cables 300 toward the fixing frame 201. At the same time, under the reaction force, the second pull rope 203 drives the other cable 300 to move toward the fixing frame 201, and drives the two cables 300 to rise upward at the same time. At this time, under the pulling force of the traction mechanism 200, the pull rod 109 drives the adjusting block 10 7 slides along the adjustment groove 106, so that each of the ejector pins 115 slides forward along the surface of the one-way threaded rod 108 until it cannot slide anymore and is clamped by the thread of the thread on the surface of the one-way threaded rod 108, so that the lower clamping plate 101 cooperates with the upper clamping plate 102 to clamp the cable 300 between the upper clamping groove 105 and the lower clamping groove 104, ensuring that the cable 300 is firmly clamped during the pulling process; as the ratchet 205 rotates, the traction mechanism 200 pulls the two cables 300 to approximately horizontal level, and the ends overlap.

[0041] Finally, the ends of the two cables 300 are connected, and then the two wire clamping tools 100 are disassembled to complete the entire wiring process.

[0042] In this article, the directional words such as front, back, top, and bottom involved are defined by the positions of the parts in the drawings and the positions of the parts relative to each other, just for the sake of clarity and convenience in expressing the technical solution. It should be understood that they are relative concepts and can change accordingly according to different ways of use and placement, and the use of the directional words should not limit the scope of protection claimed in this application.

[0043] In the absence of conflict, the above embodiments and features in the embodiments may be combined with each other. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A cable clamping tool for high-altitude cables, characterized in that: include: A lower clamping plate, one side of the rear end of which is provided with a lower clamping groove, and the other front end is provided with an adjustment groove arranged along the front-to-back direction; An upper clamping plate, the lower end of which is rotatably connected to the rear end of the lower clamping plate, and a rotatable upper clamping groove is provided in the middle, and the upper clamping groove and the lower clamping groove are arranged opposite to each other in the upper and lower directions; And a driving rod, a rear end of which is rotatably connected to the front end of the upper clamping plate, and the front end is rotatably connected to an adjusting block, the adjusting block is slidably arranged in the adjusting groove, the adjusting block is provided with a movable hole extending in the front-to-back direction, and the adjusting groove is also provided with a one-way threaded rod penetrating the movable hole, the inner wall of the movable hole is provided with a plurality of radially slidable ejectors, the ejectors are connected to the adjusting block through an elastic member, and each of the ejectors is clamped in the surface of the one-way threaded rod, and the adjusting block slides forward along the adjusting groove so that each of the ejectors can slide forward along the surface of the one-way threaded rod and be clamped.

2. A cable clamping tool for an aerial cable as claimed in claim 1, characterized in that: The adjusting block is provided with a mounting groove above the movable hole, the ejector pin can slidably pass through the bottom of the mounting groove and extend to the inner wall of the movable hole, the upper end of the ejector pin is connected to the adjusting block through the elastic member, and the lower end can be stuck in the surface of the one-way threaded rod.

3. A cable clamping tool for an aerial cable as claimed in claim 2, characterized in that: A vertically slidable pressing plate is arranged in the installation groove, the upper end of each ejector pin is fixedly connected to the pressing plate, and the upper surface of the pressing plate is connected to the upper part of the adjusting block through an elastic member.

4. A cable clamping tool for an aerial cable as claimed in claim 1, characterized in that: The elastic member is a spring.

5. The high-altitude cable clamping tool according to claim 1, characterized in that: The bottom surface of the adjustment groove is provided with a lower sliding groove, and the top surface is provided with an upper sliding groove. The lower end of the adjustment block is provided with a lower sliding block, and the upper end is provided with an upper sliding block. The lower sliding block can be slidably embedded in the lower sliding groove, and the upper sliding block can be slidably embedded in the upper sliding groove.

6. A cable clamping tool for an aerial cable as claimed in claim 1, characterized in that: The thread profile of the surface of the one-way threaded rod is sawtooth-shaped, and the lower end of each ejector pin is inserted between two thread teeth of the thread.

7. A cable clamping tool for an aerial cable as claimed in claim 1, characterized in that: The lower clamping plate is L-shaped, and a lower clamping block is provided on one side of the rear end of the lower clamping plate. A lower clamping groove is provided on the upper surface of the lower clamping block. A horizontally arranged first rotating shaft is provided in the middle of the upper clamping plate, and the first rotating shaft can be rotatably connected to the upper clamping block. The upper clamping block and the lower clamping block are arranged opposite to each other up and down, and an upper clamping groove is provided on the bottom of the upper clamping block.

8. The high-altitude cable clamping tool according to claim 1, characterized in that: It also includes a pull rod, which is rotatably connected to the adjustment block.

9. A tensioning device for an aerial cable, characterized in that: It comprises two wire clamping tools for aerial cables as described in any one of claims 1 to 8, and also comprises a traction mechanism, which is used to connect the two wire clamping tools respectively so as to pull the two wire clamping tools toward the traction mechanism at the same time.

10. A tensioning device for an aerial cable as claimed in claim 9, characterized in that: The traction mechanism includes a fixed frame, a first pull rope, a second pull rope, a pulley, a winding drum, a ratchet, a pawl and a handle, wherein the winding drum is rotatably installed in the fixed frame, the ratchet is installed on one side of the fixed frame and connected to the winding drum, the pawl is rotatably installed on one side of the fixed frame and a second torsion spring is provided between the pawl and the fixed frame, the pawl is located on the rotation path of the ratchet, the handle is detachably connected to the ratchet, the first pull rope passes around the pulley and one end is connected to one end of the fixed frame and the other end is wound around the winding drum, the pulley can be connected to an adjustment block of the wire clamping tool, one end of the second pull rope is connected to the other end of the fixed frame and the other end can be connected to another adjustment block of the wire clamping tool.

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