Anti-pull buffer device for power cable and use method thereof

Abstract

The present invention discloses an anti-pull buffer device for power cables and a method for using the same, which belongs to the technical field of power cables; it includes two steel wire ropes arranged in parallel with the power cables, a tensioning assembly connected at both ends of the steel wire ropes, a buffer assembly sleeved in the middle of the steel wire ropes, an anti-pull assembly connecting the middle of the power cable with the steel wire ropes, and a distributed force assembly connecting the ends of the power cable with the steel wire ropes; the two steel wire ropes are both mounted on the front transmission tower, the middle transmission tower and the rear transmission tower, and both ends of each steel wire rope are connected to the tensioning assembly; the middle transmission tower is provided with a buffer assembly, which is used to clamp the steel wire ropes and to weaken the force perpendicular to the length direction of the steel wire ropes that the steel wire ropes are subjected to due to the reciprocating swing of the power cable. The device of the present invention is convenient and quick to disassemble and assemble, and is suitable for power cables of different specifications within a certain range, and plays an effective protective role on the cables.

Description

Technical Field

[0001] The present invention belongs to the technical field of power cables, and in particular relates to an anti-pull buffer device for power cables and a use method thereof. Background Art

[0002] With the rapid development of social economy, people's lives are increasingly dependent on the demand for electricity, and power construction is becoming more and more extensive. Overhead cables are needed in the process of power construction.

[0003] Overhead cables refer to power cables suspended between two power towers. Usually, there is a long distance between two adjacent power towers. The cables have a large tension under their own gravity. When encountering strong winds, they will shake violently. When the shaking is severe, they will break, making the line unusable. Especially in summer, the cables are affected by thermal expansion and contraction, and each cable sags more seriously under the action of gravity, and will swing more violently under the action of strong winds.

[0004] To solve this problem, a Chinese invention patent with patent application number 202111184932.2 discloses a buffering and anti-pull device for power cables, which is provided with a fixing part for dispersing the force of the cable on the circumference of the power cable, and then uses the take-up drum and the wire rope to tighten the fixing part, so that the tension of the cable is transmitted to the wire rope, thereby reducing the tension on the power cable; however, the prior art has the following problems: 1. When the wire rope is tightened, the weight of the power cable will be completely applied to the wire rope, but in fact, the power cable itself can withstand a certain tension and thus share some of the weight of the cable applied to the wire rope. The weight of the power cable is completely applied to the wire rope, which will greatly increase the specifications and cost of the wire rope. Improvement; 2. When the steel wire rope is tightened, since the limit support ring cannot pass through the fixed part, and the fixed part is fixedly connected to the power cable, when the steel wire rope is tightened, the two ends of the reeled steel wire rope will drive the two fixed parts together with the cable between the two fixed parts to move to both ends through the limit support ring. At this time, the local area of ​​the power cable is prone to generate tension toward both ends (at this time, the steel wire rope between the two fixed parts is in a stress-free state). Since the steel wire rope needs to overcome the gravity of the power cable and its own gravity when being tensioned, the tension on the steel wire rope is huge. After this huge tension is applied to the local area of ​​the power cable, it is easy to damage the power cable, causing damage to the power cable. Summary of the invention

[0005] The purpose of the present invention is to provide an anti-pull buffer device for power cables and a method of using the same, so as to solve the technical problem that the existing high-voltage cables are shaken significantly and broken due to strong winds during installation and use, resulting in the line being unusable.

[0006] To achieve the above-mentioned purpose, the specific technical scheme of the anti-pull buffer device for power cables and the use method thereof of the present invention is as follows:

[0007] A pull-proof buffer device for power cables, three power cables are installed on at least three transmission towers, the three transmission towers are respectively a front transmission tower, a middle transmission tower and a rear transmission tower, the pull-proof buffer device comprises two steel wire ropes arranged in parallel with the power cables, a tensioning assembly connected at both ends of the steel wire ropes, a buffer assembly sleeved at the middle of the steel wire ropes, an anti-pull assembly connecting the middle of the power cable with the steel wire ropes, and a distributed force assembly connecting the ends of the power cable with the steel wire ropes;

[0008] Two steel wire ropes are installed on the front transmission tower, the middle transmission tower and the rear transmission tower. Both ends of each steel wire rope are detachably connected to the tensioning assembly, and the tensioning assembly is arranged around the front / rear transmission tower.

[0009] A buffer assembly is provided on the middle transmission tower, which is used to clamp the steel wire rope and to weaken the force perpendicular to the length direction of the steel wire rope caused by the reciprocating swing of the power cable;

[0010] Anti-pull components are installed in the middle of the power cable and the steel wire rope, and distributed force components are installed at both ends of the power cable and the steel wire rope.

[0011] Furthermore, guide components are fixedly arranged on the front / rear transmission pole towers, and the steel wire rope is connected with the tensioning component after passing through the guide component.

[0012] Furthermore, the guide assembly includes a mounting ring fixedly connected to the front / rear end transmission tower, and a guide wheel is fixedly arranged on the mounting ring.

[0013] Furthermore, the tensioning assembly includes a first counterweight block sleeved on the two steel wire ropes, a second counterweight block connected to the first counterweight block, and a connecting piece connecting the first counterweight block and the second counterweight block.

[0014] Furthermore, the first counterweight block and the second counterweight block have the same structure. The first counterweight block includes a main body that fits tightly with the front / rear end transmission pole tower, and a groove that matches the front / rear end transmission pole tower is provided on one side of the main body facing the front / rear end transmission pole tower, and lugs connected to the ends of the steel wire rope are integrally formed on both sides of the main body.

[0015] Furthermore, the buffer assembly includes a mounting frame fixed on the middle end transmission tower, a group of clamping blocks are fixed on the mounting frame, a buffer portion is arranged between two clamping blocks, and two steel wire ropes are respectively clamped between the two clamping blocks and the buffer portion.

[0016] Furthermore, the buffer part includes an adjustment column threadedly connected to the mounting frame, a receiving column is integrally formed at the top of the adjustment column, a damping buffer rod is arranged in the receiving column, a telescopic rod is slidably arranged in the damping buffer rod, and a buffer shock absorbing spring is sleeved on the damping buffer rod and the telescopic rod;

[0017] A cover body is arranged at one end of the telescopic rod away from the damping buffer rod, the peripheral side of the cover body is rotatably connected to the adjusting rod, the end of the adjusting rod away from the cover body is rotatably connected to the matching block, the matching block is slidably arranged on the clamping block, and the wire rope clamping is arranged between the matching block and the clamping block.

[0018] Furthermore, a first nut and a second nut are threadedly connected on the adjusting column, and the first nut and the second nut are respectively arranged on both sides of the mounting frame.

[0019] Furthermore, at least one group of through slots for accommodating the ends of the adjusting rods is arranged on the periphery of the cover body, and through holes are arranged through the through slots along the direction of the wire rope, screws are sleeved in the through holes, and the ends of the screws are threadedly connected to nuts.

[0020] Furthermore, the anti-pull component includes a Z-shaped connecting frame, both ends of which are provided with universal through holes, and universal balls are rotatably connected in the two universal through holes. A threaded through hole is provided in the middle of each universal ball, and a threaded rod is threadedly connected in the threaded through hole. The end of the threaded rod away from the connecting frame is detachably connected to the clamping part.

[0021] Furthermore, the clamping part includes a mounting block threadedly connected to the threaded rod, a first clamping block is integrally formed at one end of the mounting block away from the threaded rod, the first clamping block is rotatably connected to the second clamping block at one end away from the mounting block, and through holes are provided at one end of the first clamping block and the second clamping block near the mounting block, a screw rod is detachably provided in the through hole, and the end of the screw rod is threadedly connected to a nut.

[0022] Furthermore, the difference between the distributed force component and the anti-pull component is that a clamping component is also provided on the first clamp block or the second clamp block of the distributed force component, and a friction component is also provided on the inner wall of the first clamp block and the second clamp block.

[0023] Furthermore, a threaded through hole is provided on the first clamping block or the second clamping block, and the threaded through hole is threadedly connected to the clamping assembly;

[0024] The clamping assembly comprises a clamping column threadedly connected to the threaded through hole, and the clamping column is integrally formed with the second clamping block or the first clamping block to form a clamping block.

[0025] Furthermore, the friction assembly includes convex strips arranged in parallel on the inner walls of the first clamping block and the second clamping block, and multiple groups of convex strips are vertically arranged along the length direction of the wire rope or the power cable.

[0026] The present invention also provides a method for using the anti-pull buffer device for a power cable, comprising the following steps:

[0027] Step S1, installing a buffer assembly on a mid-end transmission tower;

[0028] Step S2, setting two steel wire ropes on the front transmission tower, the middle transmission tower and the rear transmission tower, and clamping the middle parts of the two steel wire ropes in the buffer assembly;

[0029] Step S3, connecting a certain number of tensioning components to the ends of the two steel wire ropes;

[0030] Step S4, using two anti-pull components to be respectively sleeved on the middle parts of the two steel wire ropes and the middle parts of the power cables at both ends;

[0031] Step S5: Use four distributed force components to be respectively mounted on the ends of the two steel wire ropes and the end of the middle power cable.

[0032] The anti-pull buffer device for power cables of the present invention and the use method thereof have the following advantages: through the tensioning component, the auxiliary steel wire rope is always in a taut state, which can reduce the shaking of the steel wire rope in windy weather and further reduce the swing of the power cable; the buffer component is used to achieve support and wind and break prevention between the steel wire rope and the power cable; the anti-pull components and the distributed force components are distributed on the steel wire rope and the power cable at intervals, so that during the swing of the power cable, the force exerted on the swing of the power cable can be decomposed into the steel wire rope and the adjacent power cables, so that the forces exerted on the power cable and the steel wire rope in different directions can be released, thereby reducing the influence of wind on the power cable, avoiding the breakage of the power cable and extending the service life of the power cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a usage status diagram of an anti-pull buffer device for power cables in Example 3 of the present invention.

[0034] Figure 2 This is a partial usage state diagram of an anti-pull buffer device for power cables in Example 3 of the present invention.

[0035] Figure 3 The structure of the tensioning assembly of the anti-pull buffer device for power cables of the present invention is schematically shown. Figure 1 .

[0036] Figure 4 The present invention is a schematic structural diagram of a first counterweight block of an anti-pull buffer device for power cables.

[0037] Figure 5 This is a usage state diagram of a buffer component of an anti-pull buffer device for a power cable of the present invention.

[0038] Figure 6 for Figure 5 A partial enlarged view of point A.

[0039] Figure 7 The structure of the buffer assembly of the anti-pull buffer device for power cables of the present invention is schematically shown. Figure 1 .

[0040] Figure 8 The structure of the buffer assembly of the anti-pull buffer device for power cables of the present invention is schematically shown. Figure 2 .

[0041] Fig. 9 The present invention is a top view of a buffer assembly of an anti-pull buffer device for a power cable.

[0042] Fig.10 for Fig. 9 Cross-sectional view along the AA direction.

[0043] Fig.11 The present invention is a schematic structural diagram of an anti-pull component of an anti-pull buffer device for a power cable.

[0044] Fig.12 The present invention is a side view of an anti-pull component of an anti-pull buffer device for a power cable.

[0045] Fig.13 for Fig.12 Cross-sectional view along direction BB.

[0046] Fig.14 The structure of the distributed force component of the anti-pull buffer device for power cables of the present invention is schematically shown. Figure 1 .

[0047] Fig.15 The structure of the distributed force component of the anti-pull buffer device for power cables of the present invention is schematically shown. Figure 2 .

[0048] Fig.16 This is a diagram showing the use status of a compression assembly and a friction assembly of an anti-pull buffer device for a power cable of the present invention installed on a clamping part.

[0049] Fig.17 The present invention is a schematic structural diagram of a guide assembly of an anti-pull buffer device for a power cable.

[0050] Fig.18 The use state of the anti-pull buffer device for power cables described in Example 4 of the present invention Figure 1 .

[0051] Fig.19 The use state of the anti-pull buffer device for power cables described in Example 4 of the present invention Figure 2 .

[0052] Description of the markings in the figure:

[0053] 1. Power cables; 2. Front-end transmission towers; 3. Middle-end transmission towers; 4. Back-end transmission towers; 5. Steel wire ropes;

[0054] 6. tensioning assembly; 601. first counterweight; 6011. body; 6012. groove; 6013. lug; 602. second counterweight; 603. connector;

[0055] 7. Buffer assembly; 701. Mounting frame; 702. Clamping block; 703. Buffering part; 7031. Adjusting column; 7032. Accommodating column; 7033. Damping buffer rod; 7034. Telescopic rod; 7035. Buffer shock absorbing spring; 7036. Cover body; 7037. Adjusting rod; 7038. Matching block; 704. Slide rail; 705. Sliding block; 706. First nut; 707. Second nut;

[0056] 8. Anti-pull assembly; 801. Connecting frame; 802. Universal ball; 803. Threaded rod; 804. Clamping part; 8041. Mounting block; 8042. First clamping block; 8043. Second clamping block;

[0057] 9. Distributed force component; 901. Pressing component; 9011. Pressing column; 9012. Pressing block; 902. Friction component; 9021. Raised strip;

[0058] 10. Pull ring;

[0059] 11. Guide assembly; 111. Mounting ring; 112. Guide wheel. DETAILED DESCRIPTION

[0060] In order to better understand the purpose, structure and function of the present invention, the following is a further detailed description of an anti-pull buffer device for a power cable and a method of using the same in conjunction with the accompanying drawings.

[0061] Embodiment 1:

[0062] A pulling-proof buffer device for power cables, wherein three power cables 1 are installed on at least three transmission towers, and the three transmission towers are a front transmission tower 2, a middle transmission tower 3 and a rear transmission tower 4 in sequence;

[0063] The anti-pull buffer device includes two steel wire ropes 5 arranged in parallel with the power cable 1, a tensioning assembly 6 connected to both ends of the steel wire rope 5, a buffer assembly 7 sleeved on the middle of the steel wire rope 5, an anti-pull assembly 8 connecting the middle of the power cable 1 with the steel wire rope 5, and a distributed force assembly 9 connecting the end of the power cable 1 with the steel wire rope 5;

[0064] Two steel wire ropes 5 are both erected on the front transmission pole tower 2, the middle transmission pole tower 3 and the rear transmission pole tower 4, and the two steel wire ropes 5 are arranged on the same horizontal plane and symmetrically distributed along the central axis of the front transmission pole tower 2, the middle transmission pole tower 3 and the rear transmission pole tower 4. Both ends of each steel wire rope 5 are detachably connected to the tensioning assembly 6, and the tensioning assembly 6 is arranged on the periphery of the front transmission pole tower 2 and the rear transmission pole tower 4;

[0065] A buffer assembly 7 is provided on the middle end transmission tower 3, and the buffer assembly 7 is used to clamp the steel wire rope 5 and to weaken the force perpendicular to the length direction of the steel wire rope 5 that the steel wire rope 5 is subjected to due to the reciprocating swing of the power cable 1;

[0066] The middle of the power cable 1 and the steel wire rope 5 is sleeved with an anti-pull component 8, and both ends of the power cable 1 and the steel wire rope 5 are sleeved with a distributed force component 9;

[0067] In this embodiment, a total of four anti-pull components 8 and eight distributed force components 9 are arranged on the three power cables 1 of the three transmission towers. Specifically, a total of two anti-pull components 8 and four distributed force components 9 are arranged on the three power cables 1 of two adjacent transmission towers; the two anti-pull components 8 are respectively sleeved on the middle parts of the two steel wire ropes 5 and the middle parts of the power cables 1 at both ends; the four distributed force components 9 are respectively sleeved on the ends of the two steel wire ropes 5 and the end of the middle power cable 1.

[0068] Working principle:

[0069] When encountering strong winds, the power cable 1 is connected to the steel wire rope 5 through the anti-pull component 8 and the distributed force component 9, so the power cable 1 will pull the connected steel wire rope 5 to swing together. However, because the tensioning components 6 are set at both ends of the two steel wire ropes 5, the auxiliary steel wire rope 5 is always in a taut state, which can reduce the shaking of the steel wire rope 5 in windy weather and further reduce the swing of the power cable 1.

[0070] Furthermore, by arranging a buffer assembly 7 in the middle of the steel wire rope 5, the vibration amplitude of the steel wire rope 5 can be weakened by the buffer assembly 7, and the swing of the power cable 1 can be further weakened;

[0071] Due to the influence of gravity, the power cable 1 presents a downward arc when laid. In windy weather, the position where the power cable 1 swings the most is the middle cable between two adjacent transmission towers. Therefore, the anti-pull component 8 is set in the middle of the power cable 1 and the wire rope 5, which can effectively pull the swinging action of the power cable 1. In order to avoid the middle part of the wire rope 5 on the adjacent transmission tower being stressed and breaking, the distributed force component 9 is set at both ends of the power cable 1 and the wire rope 5 to help share the pulling force on the wire rope 5 locally and avoid the wire rope 5 from breaking.

[0072] A method for using an anti-pull buffer device for a power cable comprises the following steps:

[0073] Step S1, installing a buffer assembly 7 on a mid-end transmission tower 3;

[0074] Step S2, setting two steel wire ropes 5 on the front transmission tower 2, the middle transmission tower 3 and the rear transmission tower 4, and clamping the middle parts of the two steel wire ropes 5 in the buffer assembly 7;

[0075] Step S3, the ends of the two steel wire ropes 5 are connected to a certain number of tensioning components 6;

[0076] Step S4, using two anti-pull components 8 to be respectively sleeved on the middle parts of the two steel wire ropes 5 and the middle parts of the power cables 1 at both ends;

[0077] Step S5: Use four distributed force components 9 to be respectively sleeved on the ends of the two steel wire ropes 5 and the end of the middle power cable 1.

[0078] In this embodiment, pull rings 10 are provided at both ends of the steel wire rope 5, which are detachably connected to the tensioning assembly 6 through the pull rings 10; the tensioning assembly 6 includes a first counterweight block 601 sleeved on the two steel wire ropes 5, a second counterweight block 602 connected to the first counterweight block 601, and a connecting piece 603 connecting the first counterweight block 601 and the second counterweight block 602; the number of the second counterweight blocks 602 can be increased or decreased at will according to the size of the wind force and the swing of the power cable 1.

[0079] In this embodiment, the first counterweight block 601 and the second counterweight block 602 have the same structure. The first counterweight block 601 includes a body 6011 that fits tightly with the front / rear transmission pole tower 4, and a groove 6012 that matches the front / rear transmission pole tower 4 is provided on one side of the body 6011 facing the front / rear transmission pole tower 4. The body 6011 is integrally formed with lugs 6013 connected to the ends of the steel wire rope 5 on both sides of the central axis of the front / rear transmission pole tower 4, and the lugs 6013 match the pull rings 10 and the connector 603 at both ends of the steel wire rope 5.

[0080] When in use, the installation of the first counterweight 601 can be completed by sleeve-mounting the pull rings 10 of the two steel wire ropes 5 on the two lugs 6013 on both sides of the main body 6011. The second counterweight 602 and the first counterweight 601 can be connected through the connecting piece 603. When the wind force is strong, the number of second counterweights 602 can be increased to stabilize the steel wire rope 5. By providing a groove 6012 on one side of the main body 6011 that matches the front / rear end transmission pole tower 4, the main body 6011 and the front / rear end transmission pole tower 4 can be closely fitted. At the same time, by arranging the lugs 6013 on both sides of the central axis of the front / rear end transmission pole tower 4, and the two steel wire ropes 5 are arranged on both sides of the central axis of the front / rear end transmission pole tower 4, and then the two steel wire ropes 5 are respectively sleeved on the lugs 6013 on both sides, the shaking phenomenon of the tensioning component 6 in windy weather can be reduced.

[0081] In this embodiment, the buffer assembly 7 includes a mounting frame 701 fixed on the middle end transmission tower 3, a group of clamping blocks 702 are fixedly arranged on the mounting frame 701, a buffer portion 703 is arranged between two clamping blocks 702, and two steel wire ropes 5 are clamped and arranged between the two clamping blocks 702 and the buffer portion 703 respectively;

[0082] When the power cable 1 swings back and forth, the two steel wire ropes 5 are connected to the power cable 1 through the anti-pull component 8 and the distributed force component 9. The two steel wire ropes 5 will swing back and forth with the power cable 1 between the clamping block 702 and the buffer part 703. The buffer part 703 is used to buffer the swing of the two steel wire ropes 5, further reducing the amplitude of the shaking of the power cable 1 and preventing the power cable 1 from being excessively deformed and broken due to excessive wind force.

[0083] In this embodiment, the buffer part 703 includes an adjustment column 7031 threadedly connected to the mounting frame 701, a receiving column 7032 is integrally formed at the top of the adjustment column 7031, a damping buffer rod 7033 is arranged in the receiving column 7032, a telescopic rod 7034 is slidably arranged in the damping buffer rod 7033, and a buffer shock absorbing spring 7035 is sleeved on the damping buffer rod 7033 and the telescopic rod 7034;

[0084] A cover body 7036 is set at one end of the telescopic rod 7034 away from the damping buffer rod 7033, and the cover body 7036 is rotatably connected to the adjusting rod 7037 on the periphery, and the adjusting rod 7037 is rotatably connected to the matching block 7038 at one end away from the cover body 7036. The matching block 7038 is slidably set on the clamping block 702, and the wire rope 5 is clamped between the matching block 7038 and the clamping block 702.

[0085] In this embodiment, a slide rail 704 is disposed in the middle of the clamping block 702 , and a slider 705 that cooperates with the slide rail 704 is disposed at the bottom end of the matching block 7038 .

[0086] When in use, the steel wire rope 5 is clamped between the matching block 7038 and the clamping block 702. When the power cable 1 swings back and forth in windy weather, the steel wire rope 5 is further pulled to swing back and forth, and the steel wire rope 5 repeatedly squeezes the matching block 7038. Since the matching block 7038 is connected to the damping buffer rod 7033, the telescopic rod 7034 and the buffer shock-absorbing spring 7035 through the adjusting rod 7037, the matching block 7038 will make reciprocating translational motion on the clamping block 702 along the slide rail 704 under the repeated squeezing of the steel wire rope 5.

[0087] In this embodiment, the first nut 706 and the second nut 707 are threadedly connected to the adjusting column 7031 , and the first nut 706 and the second nut 707 are respectively disposed on two sides of the mounting frame 701 .

[0088] In this embodiment, at least one group of through grooves for accommodating the ends of the adjusting rods 7037 are arranged on the periphery of the cover body 7036. Through holes are arranged through the through grooves along the direction of the wire rope 5. Screws are sleeved in the through holes, and the ends of the screws are threadedly connected to nuts.

[0089] In this embodiment, the anti-pull component 8 includes a Z-shaped connecting frame 801, and universal through holes are provided at both ends of the connecting frame 801. Universal balls 802 are rotatably connected in the two universal through holes. A threaded through hole is provided in the middle of each universal ball 802, and a threaded rod 803 is threadedly connected in the threaded through hole. The end of the threaded rod 803 away from the connecting frame 801 can be detachably connected to the clamping part 804.

[0090] When in use, the threaded rod 803 can be threadedly rotated in the threaded through hole to adjust the length of the entire anti-pull assembly 8, so that the anti-pull assembly 8 can be used in more occasions. By arranging universal balls 802 at both ends of the connecting frame 801, the pulling force on the anti-pull assembly 8 can be buffered, thereby extending the service life of the anti-pull assembly 8.

[0091] The clamping part 804 and the threaded rod 803 are arranged in a detachable connection mode, so as to facilitate replacement of the clamping part 804 with different specifications according to needs.

[0092] In this embodiment, the clamping portion 804 includes a mounting block 8041 threadedly connected to the threaded rod 803, and a first clamping block 8042 is integrally formed at one end of the mounting block 8041 away from the threaded rod 803, and the first clamping block 8042 is rotatably connected to the second clamping block 8043 at one end away from the mounting block 8041. Through holes are provided at one end of the first clamping block 8042 and the second clamping block 8043 near the mounting block 8041, and a screw rod is detachably provided in the through hole, and a nut is threadedly connected to the end of the screw rod; the first clamping block 8042 and the second clamping block 8043 are rotatably connected to the second clamping block 8043. The clamp block 8043 is adapted to the steel wire rope 5. The second clamp block 8043 is rotated to open the clamping part 804, and then the first clamp block 8042 is put on the steel wire rope 5. The second clamp block 8043 is reversed, and the clamping part 804 is closed. The steel wire rope 5 is stored between the first clamp block 8042 and the second clamp block 8043. Finally, the screw is passed through the through holes on the first clamp block 8042 and the second clamp block 8043, and a nut is installed on the end of the screw to achieve the purpose of placing the anti-pull component 8 between the steel wire rope 5 and the power cable 1.

[0093] In this embodiment, the difference between the distributed force component 9 and the anti-pull component 8 is that a clamping component 901 is also provided on the first clamp block 8042 or the second clamp block 8043 of the distributed force component 9, and a friction component 902 is also provided on the inner wall of the first clamp block 8042 and the second clamp block 8043.

[0094] In this embodiment, a threaded through hole is provided on the first clamping block 8042 or the second clamping block 8043, and the threaded through hole is threadedly connected to the clamping assembly 901;

[0095] The clamping assembly 901 includes a clamping column 9011 threadedly connected to the threaded through hole, and the clamping column 9011 is integrally formed with a clamping block 9012 toward the second clamping block 8043 or the first clamping block 8042 .

[0096] In this embodiment, the friction assembly 902 includes convex strips 9021 arranged in parallel on the inner walls of the first clamping block 8042 and the second clamping block 8043 , and multiple groups of convex strips 9021 are vertically arranged along the length direction of the wire rope 5 or the power cable 1 .

[0097] When in use, the convex strip 9021 and the clamping assembly 901 are provided to increase the friction between the distributed force assembly 9 and the steel wire rope 5 and the end of the power cable, so as to prevent the distributed force assembly 9 from sliding toward the anti-pull assembly 8 under the influence of gravity.

[0098] Embodiment 2:

[0099] A guide assembly 11 is fixedly arranged on both the front transmission pole tower 2 and the rear transmission pole tower 4 , and the steel wire rope 5 is connected to the tensioning assembly 6 after passing through the guide assembly 11 .

[0100] In this embodiment, the guide assembly 11 includes a mounting ring 111 fixedly connected to the front transmission pole tower 2 and the rear transmission pole tower 4, and a guide wheel 112 is fixedly arranged on the mounting ring 111; specifically, a group of guide wheels 112 are symmetrically arranged on the mounting ring 111.

[0101] A method for using an anti-pull buffer device for a power cable comprises the following steps:

[0102] Step S1, installing a buffer assembly 7 on the middle transmission tower 3, and installing a guide assembly 11 on the front transmission tower 2 and the rear transmission tower 4;

[0103] Step S2, setting two steel wire ropes 5 on the front transmission tower 2, the middle transmission tower 3 and the rear transmission tower 4, and clamping the middle parts of the two steel wire ropes 5 in the buffer assembly 7;

[0104] Step S3, the ends of the two steel wire ropes 5 are connected to a certain number of tensioning assemblies 6 after passing through the guide assembly 11;

[0105] Step S4, using two anti-pull components 8 to be respectively sleeved on the middle parts of the two steel wire ropes 5 and the middle parts of the power cables 1 at both ends;

[0106] Step S5: Use four distributed force components 9 to be respectively sleeved on the ends of the two steel wire ropes 5 and the end of the middle power cable 1.

[0107] Embodiment 3:

[0108] A pull-proof buffer device for power cables, installed in Figure 1-Figure 2 The overhead cable shown has three power cables 1 in total, and the three power cables 1 are installed on the same horizontal plane.

[0109] In this embodiment, at least two anti-pull components 8 are provided.

[0110] In this embodiment, at least four distributed force components 9 are provided.

[0111] In this embodiment, two steel wire ropes 5 are arranged below the three power cables 1 .

[0112] In this embodiment, two steel wire ropes 5 are arranged above the three power cables 1 .

[0113] Embodiment 4:

[0114] A pull-proof buffer device for power cables, installed in Figure 18-19 The overhead cable shown has three power cables 1 , two of which are installed on the same horizontal plane, and the remaining power cable 1 is installed at a height greater than that of the two power cables 1 .

[0115] Tensioning components 6 are set at both ends of the two steel wire ropes 5, and the auxiliary steel wire ropes 5 are always in a taut state, so that part of the weight and pulling force of the two power cables 1 located below the steel wire ropes 5 can be transmitted to the two steel wire ropes 5; at the same time, because the two steel wire ropes 5 are connected to the power cable 1 above, part of the weight of the steel wire ropes 5 and part of the pulling force they are subjected to can be transmitted to the power cable 1 at the top, so that the specifications of the steel wire ropes 5 can be appropriately reduced, thereby achieving the purpose of reducing costs, and at the same time, it also avoids the steel wire ropes 5 from being broken due to excessive pulling.

[0116] And because the steel wire rope 5 and the power cable 1 are connected by at least two anti-pull components 8 and at least four distributed force components 9, the two anti-pull components 8 are respectively sleeved on the middle part of the two steel wire ropes 5 and the middle part of the power cable 1 at both ends; the four distributed force components 9 are respectively sleeved on the ends of the two steel wire ropes 5 and the end of the middle power cable 1; through the above setting method, the power cable 1 and the steel wire rope 5 can be prevented from being broken due to local force.

[0117] In this embodiment, a group of buffer components 7 are symmetrically arranged along the middle transmission tower 3 .

[0118] When using:

[0119] First, fix the mounting frame 701 on the middle-end transmission tower 3, respectively set up the two steel wire ropes 5 in the two clamping blocks 702, respectively slide the two matching blocks 7038 to the surfaces of the two clamping blocks 702, thread the buffer part 703 to the mounting frame 701, and adjust the height of the adjusting column 7031 on the mounting frame 701 to achieve the clamping action of the matching block 7038 and the clamping block 702 on the steel wire rope 5. Finally, tighten the first nut 706 and the second nut 707 to achieve the purpose of fixing the buffer part 703 on the mounting frame 701, use a screw to pass through the through hole and the adjusting rod 7037, and connect the nut to the end of the screw to fix the matching block 7038 at the specified position, and firmly clamp the steel wire rope 5 together with the clamping block 702.

[0120] Secondly, fix the mounting ring 111 on the front transmission tower 2 and the rear transmission tower 4, connect the two ends of the wire rope 5 to the first counterweight 601 through the guide wheel 112, and increase the number of second counterweights 602 as needed.

[0121] Again, the two anti-pull components 8 are respectively mounted on the middle part of the two steel wire ropes 5 and the middle part of the power cable 1 at both ends; specifically, the first clamp 8042 and the second clamp 8043 at one end are first mounted on the power cable 1 or the steel wire rope 5, and then the first clamp 8042 and the second clamp 8043 at the other end are mounted on the steel wire rope 5 or the power cable 1 by adjusting the length of the threaded rod 803. Under the action of gravity, the two anti-pull components 8 will automatically slide to the middle part of the two steel wire ropes 5 and the middle part of the power cable 1 at both ends.

[0122] Finally, the four distributed force components 9 are respectively mounted on the ends of the two steel wire ropes 5 and the end of the middle power cable 1; specifically, the first clamp 8042 and the second clamp 8043 at one end are first mounted on the power cable 1 or the steel wire rope 5, and the clamping column 9011 is rotated to make the clamping block 9012 closely contact the surface of the power cable 1 or the steel wire rope 5, and then the first clamp 8042 and the second clamp 8043 at the other end are mounted on the steel wire rope 5 or the power cable 1 by adjusting the length of the threaded rod 803, and the clamping column 9011 is rotated similarly to make the clamping block 9012 closely contact the surface of the steel wire rope 5 or the power cable 1, so as to fix the four distributed force components 9 on the ends of the two steel wire ropes 5 and the end of the middle power cable 1.

[0123] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A pull-proof buffer device for power cables, wherein three power cables (1) are installed on at least three transmission towers, wherein the three transmission towers are a front transmission tower (2), a middle transmission tower (3) and a rear transmission tower (4), characterized in that: The anti-pull buffer device comprises two steel wire ropes (5) arranged in parallel with the power cable (1), a tensioning assembly (6) connected to both ends of the steel wire rope (5), a buffer assembly (7) sleeved on the middle of the steel wire rope (5), an anti-pull assembly (8) connecting the middle of the power cable (1) with the steel wire rope (5), and a distributed force assembly (9) connecting the end of the power cable (1) with the steel wire rope (5); Two steel wire ropes (5) are both installed on the front transmission pole tower (2), the middle transmission pole tower (3) and the rear transmission pole tower (4), and both ends of each steel wire rope (5) are connected to a tensioning assembly (6); Under the action of gravity, the anti-pull component (8) will automatically slide to the middle of the two steel wire ropes (5) and the middle of the power cables (1) at both ends; the force distribution component (9) is fixed to the ends of the two steel wire ropes (5) and the end of the power cable (1) in the middle; A buffer assembly (7) is provided on the middle end transmission pole tower (3), and the buffer assembly (7) is used to clamp the steel wire rope (5) and to weaken the force perpendicular to the length direction of the steel wire rope (5) exerted on the steel wire rope (5) due to the reciprocating swing of the power cable (1).

2. The anti-pull buffer device for power cables according to claim 1, characterized in that: Two anti-pull components (8) and four distributed force components (9) are arranged on three power cables (1) of two adjacent transmission towers; Two anti-pull components (8) are respectively sleeved on the middle parts of the two steel wire ropes (5) and the middle parts of the power cables (1) at both ends; The four distributed force components (9) are respectively sleeved on the ends of the two steel wire ropes (5) and the end of the middle power cable (1).

3. The anti-pull buffer device for power cables according to claim 1, characterized in that: A guide assembly (11) is fixedly arranged on both the front transmission pole tower (2) and the rear transmission pole tower (4), and the steel wire rope (5) is detachably connected to the tensioning assembly (6) after passing through the guide assembly (11).

4. The anti-pull buffer device for power cables according to claim 1, characterized in that: The tensioning assembly (6) comprises a first counterweight (601) sleeved on two steel wire ropes (5), a second counterweight (602) connected to the first counterweight (601), and a connecting piece (603) connecting the first counterweight (601) and the second counterweight (602).

5. The anti-pull buffer device for power cables according to claim 1, characterized in that: The buffer assembly (7) comprises a mounting frame (701) fixed on a middle-end power transmission tower (3); a group of clamping blocks (702) are fixedly arranged on the mounting frame (701); a buffer portion (703) is arranged between two clamping blocks (702); and two steel wire ropes (5) are clamped and arranged between the two clamping blocks (702) and the buffer portion (703), respectively.

6. The anti-pull buffer device for power cables according to claim 5, characterized in that: The buffer part (703) comprises an adjusting column (7031) threadedly connected to the mounting frame (701); a receiving column (7032) is integrally formed at the top of the adjusting column (7031); a damping buffer rod (7033) is arranged inside the receiving column (7032); a telescopic rod (7034) is slidably arranged inside the damping buffer rod (7033); and a buffer shock absorbing spring (7035) is sleeved on the damping buffer rod (7033) and the telescopic rod (7034); A cover body (7036) is arranged at one end of the telescopic rod (7034) away from the damping buffer rod (7033); the cover body (7036) is rotatably connected to the adjusting rod (7037) on the peripheral side; the adjusting rod (7037) is rotatably connected to the matching block (7038) at one end away from the cover body (7036); the matching block (7038) is slidably arranged on the clamping block (702); and the steel wire rope (5) is clamped between the matching block (7038) and the clamping block (702).

7. The anti-pull buffer device for power cables according to claim 1, characterized in that: The anti-pull assembly (8) comprises a Z-shaped connecting frame (801), both ends of the connecting frame (801) are provided with universal through holes, both universal through holes are rotatably connected to universal balls (802), a threaded through hole is provided in the middle of the universal ball (802), a threaded rod (803) is threadedly connected in the threaded through hole, and one end of the threaded rod (803) away from the connecting frame (801) is detachably connected to a clamping portion (804).

8. The anti-pull buffer device for power cables according to claim 7, characterized in that: The clamping portion (804) comprises a mounting block (8041) threadedly connected to the threaded rod (803); a first clamping block (8042) is integrally formed at one end of the mounting block (8041) away from the threaded rod (803); an end of the first clamping block (8042) away from the mounting block (8041) is rotatably connected to a second clamping block (8043); through holes are provided at one end of the first clamping block (8042) and the second clamping block (8043) close to the mounting block (8041); a screw rod is detachably provided in the through hole; and a nut is threadedly connected to the end of the screw rod.

9. The anti-pull buffer device for power cables according to claim 8, characterized in that: A clamping assembly (901) is also provided on the first clamping block (8042) or the second clamping block (8043) of the distributed force assembly (9), and a friction assembly (902) is also provided on the inner walls of the first clamping block (8042) and the second clamping block (8043).

10. A method for using the anti-pull buffer device for power cables according to claim 1, characterized in that: The following steps are involved: Step S1, installing a buffer assembly (7) on a mid-end transmission tower (3); Step S2, arranging two steel wire ropes (5) on the front-end transmission pole tower (2), the middle-end transmission pole tower (3) and the rear-end transmission pole tower (4), and clamping the middle parts of the two steel wire ropes (5) in the buffer assembly (7); Step S3, the ends of the two steel wire ropes (5) are connected to the tensioning assembly (6); Step S4, using two anti-pull components (8) to be respectively sleeved on the middle parts of the two steel wire ropes (5) and the middle parts of the power cables (1) at both ends; Step S5: Use four distributed force components (9) to be respectively mounted on the ends of the two steel wire ropes (5) and the end of the middle power cable (1).

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