A short-distance lifting device for a simple transmission overhead ground line

Abstract

The application discloses a simple power transmission overhead ground wire short-distance lifting device, and aims to solve the problems and defects that the load of the ground wire lifting device is limited and inconvenient to use when the ground wire lifting device adopts a motor to lift power fittings or ground wires, and the ground wire lifting device is not suitable for long-time maintenance of power transmission lines. The application solves the above technical problems through the following technical scheme: a setting opening is arranged on a fixing frame; a chain lifting device comprises a miniature hand-operated hoist and a ground wire hook, a chain is arranged on the miniature hand-operated hoist, the miniature hand-operated hoist is arranged on one side of the setting opening, a chain connecting part is arranged on the other side of the setting opening, and the end of the chain is connected with the chain connecting part through the ground wire hook. Through cooperation of the chain and the miniature hand-operated hoist, the device has the advantages of light overall weight, small structure, high lifting efficiency and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lifting devices, more particularly, it relates to a simple power transmission overhead ground wire short distance lifting device. BACKGROUND

[0002] The power transmission line maintenance involves the replacement of ground wire fittings, which requires lifting the ground wire to replace the fittings. The current commonly used ground wire lifting device mainly includes chain hoist, double-hook tight line device, etc. Other accessories of the lifting device include wire sleeve, turning block, U-shaped ring, etc. Due to the limited lifting space above the ground wire, the "reverse tight line" method must be used. Using tools such as wire sleeve, turning block, U-shaped ring, multiple turning hanging points are set on the tower, a lifting hook is set on the ground wire, a steel wire rope is connected, the steel wire rope is connected with the chain hoist (or double hook) through the turning block, and the chain hoist is tightened, thereby the ground wire is lifted through force transmission. The use of the above-mentioned method for lifting the ground wire uses many tools, making it very inconvenient to carry and transmit. In addition, due to the complex on-site arrangement and multiple procedures, personnel with certain work experience are required to complete the operation, making the operation complex, time-consuming and low in work efficiency.

[0003] Chinese patent No. CN113471872A, published on October 1, 2021, is entitled "Double-hoisting-point power transmission line overhead ground wire lifting device", which discloses a double-hoisting-point power transmission line overhead ground wire lifting device. The device controls the rotation of the double-end output shaft through a bidirectional servo motor, and the output shaft electrically retracts the rotating wheel, thereby driving the pull rope to move the hook body upward, and the hook moves the power fittings or ground wire up and down, thereby lifting the power fittings or ground wire. Although the above-mentioned device is convenient to use, the output torque of the motor is limited when replacing the power fittings, making the load of the above-mentioned device very small when in use, and the load used is very limited. In addition, during the maintenance of the power transmission line, the device may run out of power during use, making it very inconvenient to use and unsuitable for long-term maintenance of the power transmission line. SUMMARY

[0004] The present application overcomes the shortcomings of the prior art that the load of the ground wire lifting device is limited when the motor is used to lift the power fittings or ground wire, making it very inconvenient to use. At the same time, it is not suitable for long-term maintenance of the power transmission line. The present application provides a simple power transmission overhead ground wire short distance lifting device, which uses a micro hand plate hoist to lift the ground wire or power fittings by manually pulling the force handle, and mechanically lifts the power fittings or ground wire. The load is directly carried by the chain, which has the characteristics of large load, convenient use and stable structure.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a simplified overhead power transmission ground wire short-distance lifting device, comprising:

[0006] A mounting frame with mounting openings;

[0007] The chain lifting device includes a mini lever hoist and a ground wire hook. The mini lever hoist is equipped with a chain and is located on one side of the mounting opening. A chain connection part is located on the other side of the mounting opening. The end of the chain passes through the ground wire hook and connects to the chain connection part.

[0008] This invention can accommodate crossarm towers of varying widths by adjusting the size of the mounting opening, allowing for easy installation of the fixing frame on the crossarm tower. The ground wire hook and chain work together to easily connect the ground wire to the fixing frame support, and the chain-driven load-bearing design allows for greater load capacity. During lifting or lowering, the chain can be retracted or released by operating the handle on the miniature hand-operated hoist, facilitating the lifting or lowering of the ground wire. Furthermore, as the miniature hand-operated hoist is a mechanical structure, it is more stable during use and, compared to existing devices that use motors to lift ground wires, avoids issues of power depletion or insufficient load capacity. Therefore, this device is lightweight, compact, and highly efficient.

[0009] Preferably, the fixing frame includes a left bracket and a right bracket. The right bracket is provided with a fixing rod, and an adjusting nut is threaded onto the fixing rod. The left bracket is provided with an adjusting hole that mates with the fixing rod. The left bracket is slidably mounted on the fixing rod through the adjustment hole and the fixing rod.

[0010] By adjusting the fit between the nut and the fixing rod, the size of the mounting opening can be easily adjusted.

[0011] Preferably, the bottom of the miniature wrench hoist is equipped with a fall-prevention safety structure that works with the chain. The fall-prevention safety structure includes a guide roller and a locking roller that are rotatably mounted on the fixed frame. The locking roller is located to the side of the guide roller, and the chain passes between the locking roller and the guide roller. The locking roller is equipped with a variable-diameter locking block. The distance between the outer arc of the variable-diameter locking block and the rotation center gradually increases, and the outer arc forms a locking part at the end of the variable-diameter locking block.

[0012] By setting guide rollers and locking rollers, the chain can be effectively prevented from suddenly falling, thus ensuring safe use.

[0013] Preferably, the left bracket has a mounting groove on the side near the mounting opening, and a mounting cavity is provided inside the left bracket. The mounting cavity and the mounting groove are connected by a connecting hole. An auxiliary clamping mechanism is provided on the left bracket, and the auxiliary clamping mechanism includes:

[0014] The clamping plate is vertically arranged in the mounting groove, and the two sides of the clamping plate are provided with first springs for pushing the clamping plate into the mounting groove; the side of the clamping plate away from the erection opening is provided with an abutting protruding plate, and the abutting protruding plate is slidingly arranged in the communication hole;

[0015] The pushing plate is vertically arranged in the mounting cavity, and the side of the pushing plate close to the clamping plate is provided with a pushing protruding plate, the pushing protruding plate is obliquely arranged, and the pushing protruding plate is matched with the abutting protruding plate; the bottom of the pushing plate is provided with a second spring for pushing the pushing plate upward, and the two ends of the bottom of the pushing plate in the length direction are provided with connecting strips, and the lower parts of the connecting strips are connected with the chain connecting part.

[0016] By arranging the auxiliary clamping mechanism, the adjusting nut can be easily removed after the ground wire is lifted, so that the device can be conveniently disassembled to the next place for maintenance of the ground wire.

[0017] As preferred, the ground wire lifting hook comprises a lifting hook frame, chain wheels are rotatably arranged at the two ends of the lifting hook frame, and the axes of the two chain wheels are perpendicular to each other; a ground wire roller is rotatably arranged in the lifting hook frame.

[0018] The chain wheels at the two ends of the lifting hook frame are arranged vertically, and can adapt to ground wires in different directions in use.

[0019] As preferred, the chain connecting part comprises first and second connecting blocks arranged below the left support, and the first and second connecting blocks are both provided with through holes, bolts pass through the through holes and are connected with nuts, and the ends of the chain are arranged on the bolts.

[0020] By arranging the first and second connecting blocks, the connection between the chain and the left support can be facilitated.

[0021] As preferred, the guide roller is a waist-shaped roller, and the outer circumferences of the guide roller and the detent wheel are both provided with rubber layers.

[0022] The waist-shaped roller can make the chain abut against the waist-shaped roller more stably, the outer circumferences of the guide roller and the detent wheel are sleeved with rubber layers, which can play a role in buffering and shock absorption, and can reduce noise.

[0023] As preferred, the two ends of the bottom of the mounting cavity in the length direction are provided with mounting holes, and the second spring is arranged in the mounting hole, one end of the second spring abuts against the pushing plate, and the other end of the second spring abuts against the bottom of the mounting hole.

[0024] The second spring is arranged to push the pushing plate back to the original position, and the two mounting holes are arranged to cooperate with the second spring, so that the pushing plate is more stable when pushed back to the original position.

[0025] Preferably, abutting pads are arranged on both sides of the erection opening, and the abutting pad comprises a vertical plate fixedly connected to the side wall of the erection opening and a horizontal plate arranged horizontally.

[0026] The abutting pad can be more conveniently abutted on the cross arm head tower material.

[0027] Compared with the prior art, the present application has the following beneficial effects:

[0028] (1) By cooperation between the fixed frame and the chain lifting device, the device has the characteristics of light overall weight, small structure, light mass and high use efficiency;

[0029] (2) Compared with the device for lifting the ground wire by a motor, the device using a chain and a miniature hand plate hoist does not have the problems of power depletion or small load. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 is the front view of the present application;

[0031] Figure 2 is the front view of another embodiment of the present application;

[0032] Figure 3 is the side view of another embodiment of the present application;

[0033] Figure 4 is the working state schematic view of the auxiliary clamping device of the present application;

[0034] In the drawings: 1, fixed frame, 11, erection opening, 111, abutting pad, 112, vertical plate, 113, horizontal plate, 12, chain connecting part, 121, first connecting block, 122, second connecting block, 123, connecting bolt, 124, connecting nut;

[0035] 21, miniature hand plate hoist, 211, chain, 212, handle, 22, ground wire hook, 221, hook bracket, 222, chain roller, 223, ground wire roller;

[0036] 3, left support, 31, adjusting hole, 32, mounting groove, 33, mounting cavity, 331, mounting hole, 34, communication hole;

[0037] 4, right support, 41, fixed rod, 42, adjusting nut;

[0038] 5, anti-falling safety structure, 51, guide roller, 52, clamping wheel, 521, variable-diameter clamping block, 522, clamping part;

[0039] 6, auxiliary clamping mechanism, 61, clamping plate, 611, first spring, 612, abutting protruding plate, 62, pushing plate, 621, pushing protruding plate, 622, second spring, 623, connecting strip.

[0040] 7. Cross arm head tower member, 71. Ground wire. DETAILED DESCRIPTION

[0041] The technical solutions of the present application will be further described below by specific examples and in conjunction with the drawings:

[0042] Example 1: Referring to Figures 1 to 3 As shown in the figure, a simple type overhead ground wire short distance lifting device includes a fixed frame 1 and a chain lifting device.

[0043] The fixed frame 1 includes a left support 3 and a right support 4, and the right support 4 is fixedly provided with a fixed rod 41, and the fixed rod 41 is threadedly matched with an adjusting nut 42, and the left support 3 is provided with an adjusting hole 31 matched with the fixed rod 41, and the left support 3 is slidably arranged on the fixed rod 41 through the cooperation of the adjusting hole 31 and the fixed rod 41. A setting port 11 is formed between the left support 3 and the right support 4; abutting pads 111 are arranged on both sides of the setting port 11, and the abutting pads 111 include vertical plates 112 fixedly connected to the side walls of the setting port 11 and horizontal plates 112 arranged horizontally.

[0044] The chain lifting device includes a miniature hand-operated hoist 21 and a ground wire hook 22, the miniature hand-operated hoist 21 is prior art, the miniature hand-operated hoist 21 is fixedly arranged on the right support 4, the miniature hand-operated hoist 21 is provided with a chain 211, the miniature hand-operated hoist 21 is arranged on one side of the setting port 11, the other side of the setting port 11 is provided with a chain connecting portion 12, and the end of the chain 211 is connected to the chain connecting portion 12 through the ground wire hook 22. A guide roller 51 is arranged below the miniature hand-operated hoist 21, and the guide roller 51 is used to keep the chain 211 and the upper miniature hand-operated hoist 12 in a vertical state when the chain 211 pulls the ground wire, the guide roller 51 is a waist-shaped wheel with a gradually increasing diameter from the middle to both ends, the waist-shaped wheel can make the chain 211 abut on the waist-shaped wheel more stably, and in order to reduce noise, a rubber layer is sleeved on the outer circumference of the guide roller 51.

[0045] The ground wire hook 22 includes a hook frame 221, chain rollers 222 are rotatably arranged at both ends of the hook frame 221, the axes of the two chain rollers 222 are perpendicular to each other, and the two chain rollers 222 are detachably arranged on the hook frame 221 through bolts; a ground wire roller 223 is rotatably arranged in the hook frame 221, the ground wire roller 223 is arranged between the two hook frames 221, and the chain rollers 222 at both ends of the hook frame 221 are arranged vertically, which can adapt to ground wires in different directions during use.

[0046] The chain connecting part 12 comprises a first connecting block 121 and a second connecting block 122 arranged below the left support 3, the first connecting block 121 and the second connecting block 122 are both provided with a through hole, a connecting bolt 123 is connected with a connecting nut 124 through the through hole, and the end of the chain 211 is arranged on the connecting bolt 123. When in use, the connecting bolt 123 is first passed through a through hole, then the bolt 123 is passed through the chain 211 and connected with the connecting bolt 123 through another through hole, so as to realize the connection with the chain 211.

[0047] The working principle of the embodiment is as follows: when in use, the adjusting nut 42 is first rotated to adjust the distance between the left support 3 and the right support 4, so that the size of the erecting opening 11 can be erected on the cross arm head tower material 7 above the ground wire, then the fixing frame 1 is erected on the cross arm head tower material 7 above the ground wire 71 to be lifted through the erecting opening 11, so that the cross arm head tower material 7 abuts against the horizontal plate 113, then the adjusting nut 42 is rotated, so that the left support 3 and the right support 4 are clamped on the cross arm head tower material 7;

[0048] According to the direction of the ground wire 71, the chain roller 222 is selected and removed from the ground wire hook 22, then the ground wire 71 is placed in the hook bracket 221, and then the chain roller 222 is installed on the ground wire hook 22;

[0049] The chain 211 is passed through the chain roller 222, so that the chain roller 222 is hung on the chain 211, and then the end of the chain 221 is connected to the chain connecting part 12;

[0050] The handle of the micro hand plate hoist 21 is pulled, so that the chain 211 is retracted on the micro hand plate hoist 21, so that the ground wire hook 22 is lifted, the ground wire hook 22 drives the ground wire to be lifted upward, so as to achieve the purpose of lifting the ground wire;

[0051] When it is needed to lower the ground wire, the force handle plate is tightly pulled, the pin position of the handle is placed in the descending position, then the handle is pulled, the micro hand plate hoist 21 is reversely rotated, the chain 211 is loosened, the ground wire hook 22 is lowered, so as to lower the ground wire.

[0052] The present application can adapt to the cross arm head tower material 7 of different width by adjusting the size of the erection opening 11, so that the fixing frame 1 can be conveniently installed on the cross arm head tower material 7; the ground wire and the fixing frame 1 support can be conveniently connected through the cooperation of the ground wire hook 22 and the chain 211, and since the chain 211 is used to bear, a larger load can be borne; when ascending or descending, the handle 212 on the micro hand plate hoist 21 is operated, so that the chain can be contracted and relaxed, thereby conveniently lifting or lowering the ground wire, so that the ground wire is more convenient to lift; and since the micro hand plate hoist 21 belongs to a mechanical structure, it is more stable during use, and compared with the device for lifting the ground wire by the motor in the prior art, there is no problem of power consumption or small load; therefore, the whole device has the advantages of light weight, small structure, high lifting efficiency and the like.

[0053] Embodiment 2: Refer to Figures 1 to 3 As shown in the figure, the present embodiment is similar in structure to embodiment 1, and the difference lies in that the bottom of the micro wrench hoist 21 is provided with a falling prevention safety structure 5 matched with the chain 211, the falling prevention safety structure 5 includes a guide roller 51 and a clamping wheel 52 which are both rotationally arranged on the fixing frame 1, the clamping wheel 52 is arranged on the side of the guide roller 51, and the chain 211 passes between the clamping wheel 52 and the guide roller 51; the clamping wheel 52 is provided with a variable-diameter clamping block 521, the distance between the outer arc line of the variable-diameter clamping block 521 and the rotation center gradually increases, and the outer arc line forms a clamping portion 522 at the end of the variable-diameter clamping block 521.

[0054] The outer circumferential direction of the guide roller 51 is provided with a rubber layer.

[0055] In the present embodiment, in order to prevent the handle on the micro hand plate hoist 21 from being misoperated and causing the chain 211 to suddenly drop, which may easily cause safety hazards, the falling prevention safety structure 5 is arranged; when the ground wire is lifted, the clamping wheel 52 is rotated to abut against the guide roller 51, so that the clamping portion 522 abuts against the chain 211, when the chain 211 is lowered due to misoperation of the handle on the micro hand plate hoist 21, the descending chain 211 acts on the clamping portion 522, and the variable-diameter clamping block 521 abuts against the guide roller 51, thereby preventing the chain 211 from falling; when normal operation is needed, the clamping wheel 52 is rotated by hand to be separated from the guide roller 5 (as shown in the figure). Figure 2

[0056] Embodiment 3: Refer to Figures 1 to 4 ​As shown, the embodiment is similar to the structure of embodiment 1 or embodiment 2, except that the left support 3 is provided with a mounting groove 32 on the side close to the erection opening 11, and the left support 3 is provided with a mounting cavity 33, and the mounting cavity 33 and the mounting groove 32 are connected through a communication hole 34, and the left support 3 is provided with an auxiliary clamping mechanism 6, and the auxiliary clamping mechanism 6 comprises a clamping plate 61 and a push plate 62:

[0057] The clamping plate 61 is vertically arranged in the mounting groove 32, and the two sides of the clamping plate 61 are provided with first springs 611 for pushing the clamping plate 61 into the mounting groove 32, and the first springs 611 abut between the clamping plate 61 and the mounting groove 32; The side of the clamping plate 61 away from the erection opening 11 is provided with an abutting convex plate 612, and the abutting convex plate 612 and the clamping plate 61 are connected in a circular arc transition, and the abutting convex plate 612 is slidingly arranged in the communication hole 34;

[0058] The push plate 62 is vertically arranged in the mounting cavity 33, and the push plate 62 and the clamping plate 61 are arranged in parallel, and the push plate 62 is provided with a push convex plate 621 on the side close to the clamping plate 61, and the push convex plate 621 and the push plate 62 are connected in a circular arc transition, and the push convex plate 621 cooperates with the abutting convex plate 612, and the push convex plate 621 is arranged obliquely; The bottom of the push plate 51 is provided with a second spring 622 for pushing the push plate 62 upward, and the two ends of the bottom of the push plate 62 in the length direction are provided with connecting strips 623, and the bottom of the mounting cavity 33 is provided with through holes, and the connecting strips 623 below pass through the through holes and are connected with the chain connecting part 12.

[0059] The bottom of the mounting cavity 33 in the length direction is provided with mounting holes 331, and the second spring 622 is arranged in the mounting hole 331, and one end of the second spring 622 abuts with the push plate 62, and the other end of the second spring 622 abuts with the bottom of the mounting hole 331. The mounting hole 331 and the second spring 622 are provided with two, which can make the push plate 62 rebound better.

[0060] In actual use, in order to prevent the fixing frame 1 from being installed on the cross arm head tower material 7 more stably, the adjusting nut 42 is often screwed very tightly, so that the fixing frame 1 is installed on the cross arm head tower material 7 very stably and firmly, but after use, due to the slight deformation of the fixing frame when pulling the ground wire, it is difficult to unscrew the adjusting nut 42 from the fixing rod 41, which makes the operation very inconvenient, therefore, this embodiment is set to solve the above technical problems.

[0061] The working principle of the embodiment is as follows: when the fixing frame 1 is installed on the cross arm head tower material 7, the adjusting nut 42 is tightened on the fixing rod 41, and the adjusting nut 42 does not need to be tightened very tightly, and generally, the adjusting nut 42 is stopped from being tightened before two to three turns of the adjusting nut 42 are completely tightened, so that the spacing between the two side walls of the erecting opening 11 is greater than the width of the cross arm head tower material 7; when there is no connection with the ground wire, as shown in the figure, the pushing plate 62 is located above the installation cavity 33 under the action of the second spring 622, the pushing convex plate 621 and the abutting convex plate 612 are staggered at this time, and the clamping plate 61 is retracted in the installation slot 32 under the action of the first spring 611; Figure 4

[0062] After the installation of the use steps in the embodiment 1, the ground wire is lifted upward in the process, the chain connecting part 12 is pulled downward by the ground wire, the chain connecting part 12 pulls the pushing plate 62 downward through the action of the connecting strip 623, the inclined surface on the pushing convex plate 621 abuts on the abutting convex plate 612 in the process of pulling the pushing plate 62 downward, the pushing convex plate 621 continuously moves downward as the pulling force of the pushing plate 62 downward gradually increases, the pushing convex plate 621 continuously acts on the abutting convex plate 612, so that the clamping plate 61 continuously moves towards the direction of the erecting opening 11, thereby the clamping plate 61 is clamped on the side wall of the cross arm head tower material 7, as shown in the figure, when the pushing plate 62 is abutted on the bottom of the installation cavity 33 after being pulled downward, the outward movement stroke of the clamping plate 62 is the largest at this time, so that the clamping plate 62 is clamped on the side wall of the cross arm head tower material 7; Figure 2

[0063] When the ground wire is lifted, the pushing plate 62 is pulled downward, and the clamping plate 61 is clamped on the side wall of the cross arm head tower material 7, as shown in the figure, when the pushing plate 62 is abutted on the bottom of the installation cavity 33 after being pulled downward, the outward movement stroke of the clamping plate 62 is the largest at this time, so that the clamping plate 62 is clamped on the side wall of the cross arm head tower material 7;

[0064] The above-described embodiments are only the preferred schemes of the present application, and do not limit the present application in any form, and other variants and modifications can be made without exceeding the technical scheme recited in the claims.​​

Claims

1. A simplified short-distance lifting device for overhead power transmission ground wires, characterized in that, include: A mounting frame with mounting openings; The chain lifting device includes a mini lever hoist and a ground wire hook. The mini lever hoist is equipped with a chain and is located on one side of the mounting opening. The other side of the mounting opening is equipped with a chain connection part, and the end of the chain passes through the ground wire hook and connects to the chain connection part. The mounting bracket includes a left bracket and a right bracket. The mini lever hoist is fixedly mounted on the right bracket, and the chain connection is located below the left bracket.

2. The simplified overhead ground wire short-distance lifting device according to claim 1, characterized in that, A fixing rod is provided on the right bracket, and an adjusting nut is threaded onto the fixing rod. An adjusting hole is provided on the left bracket to cooperate with the fixing rod. The left bracket is slidably mounted on the fixing rod through the cooperation of the adjusting hole and the fixing rod.

3. The simplified overhead ground wire short-distance lifting device according to claim 1, characterized in that, The bottom of the mini wrench hoist is equipped with a fall prevention safety structure that works with the chain. The fall prevention safety structure includes a guide roller and a locking roller that are rotatably mounted on the fixed frame. The locking roller is located to the side of the guide roller, and the chain passes between the locking roller and the guide roller. The locking roller is equipped with a variable diameter locking block. The distance between the outer arc of the variable diameter locking block and the rotation center gradually increases, and the outer arc forms a locking part at the end of the variable diameter locking block.

4. The simplified overhead ground wire short-distance lifting device according to claim 2, characterized in that, The left support has a mounting groove on the side near the mounting opening, and a mounting cavity is provided inside the left support. The mounting cavity and the mounting groove are connected by a connecting hole. An auxiliary clamping mechanism is provided on the left support, which includes: A clamping plate is vertically installed in the mounting groove. First springs are provided on both sides of the clamping plate to push the clamping plate into the mounting groove. An abutting protrusion is provided on the side of the clamping plate away from the mounting opening, and the abutting protrusion is slidably installed in the connecting hole. The push plate is vertically installed in the mounting cavity. A push protrusion is provided on the side of the push plate near the clamping plate. The push protrusion is inclined and cooperates with the abutment protrusion. A second spring is provided at the bottom of the push plate to push the push plate upward. Connecting strips are provided at both ends of the bottom of the push plate along the length direction. The lower part of the connecting strips is connected to the chain connection part.

5. The simplified overhead ground wire short-distance lifting device according to any one of claims 1 to 4, characterized in that, The grounding hook includes a hook frame, with chain rollers rotatably mounted at both ends of the hook frame, the axes of the two chain rollers being perpendicular to each other; a grounding roller is rotatably mounted inside the hook frame.

6. The simplified overhead ground wire short-distance lifting device according to any one of claims 1 to 4, characterized in that, The chain connection includes a first connecting block and a second connecting block located below the left bracket. Both the first and second connecting blocks have through holes, through which bolts pass and are connected to nuts. The end of the chain is located on the connecting bolt.

7. The simplified overhead ground wire short-distance lifting device according to claim 3, characterized in that, The guide roller is an oblong roller, and both the guide roller and the positioning roller have a rubber layer on their outer circumference.

8. The simplified overhead ground wire short-distance lifting device according to claim 4, characterized in that, Mounting holes are provided at both ends of the bottom of the mounting cavity along its length. The second spring is installed in the mounting holes, with one end of the second spring abutting against the push plate and the other end of the second spring abutting against the bottom of the mounting hole.

9. The simplified overhead ground wire short-distance lifting device according to any one of claims 1 to 4, characterized in that, The two sides of the erection opening are provided with abutment plates, which include a vertical plate fixedly connected to the side wall of the erection opening and a horizontal plate set horizontally.

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