Cable tension adjusting device on electric power tower

Abstract

The utility model relates to a cable tension adjusting device on an electric power tower, and belongs to the technical field of overhead cable installation. The cable tension adjusting device comprises a tower frame and a cable, the front side and the rear side of the top of the tower frame are respectively provided with a group of first limiting wheels and a group of second limiting wheels which are used for supporting the cable in a rolling mode, and an automatic tension adjusting mechanism used for adjusting the tension of the cable is correspondingly arranged between each group of first limiting wheels and each group of second limiting wheels. The automatic tension adjusting mechanism comprises a sliding plate, a fixing plate, a sliding rail, a pulley A, a traction wheel, a pulley B, a pulley C, a pulley D and a cable, a pulley groove of the traction wheel is clamped above the cable, and the vertical pressure applied to the cable by the traction wheel is larger than the gravity of the counterweight assembly through a pulley block formed by the pulley A, the pulley B, the pulley C and the pulley D. The device is simple and reliable in structure and easier to implement.

Description

Technical Field

[0001] The utility model relates to a cable tension adjusting device on a power pole, belonging to the technical field of overhead cable installation. Background Art

[0002] A power pole is a support structure used to support transmission lines in an overhead power transmission line. According to its usage function, it can be divided into a tension tower, a straight tower, a transposition tower, and a long-span high tower. Most poles are made of steel or reinforced concrete and are the main support structures of the overhead power transmission line. In the power grid lines for residential power supply, the scraping of wires against buildings or tree branches is a common safety hazard. This is mainly because the cables installed with a large span expand and contract due to temperature changes. When the temperature is high, the cables become longer, and the sagging arc becomes significantly larger. The cables between two poles become loose. When it is windy or rainy, the cables swing greatly, which will intensify the friction between the insulating layer of the cables and buildings or tree branches, thus easily causing cable leakage. In addition, when the temperature is low, the cables shorten, and the cables between two poles will be overly tightened, resulting in a large force on the top of the poles, which will affect the service life of the poles. To keep the cables between the poles in a reasonable tension state, the prior art usually considers adding a cable tension adjusting device at the top of the power pole.

[0003] For example, the Chinese patent document with the publication number CN216971592U discloses a wire and cable tension adjusting device, which includes a vertical rod. On both sides of the top end of the vertical rod, cross rods are respectively fixedly connected. At the end parts of the cross rods, supporting wheels are respectively rotatably installed. A cable is supported on the surfaces of the two groups of supporting wheels. The supporting wheel includes two groups of relatively distributed first rotating disks. On the opposite side walls of the two groups of first rotating disks, two groups of relatively distributed first guide rollers are jointly rotatably connected. The cable passes through the two groups of first guide rollers. At the top end of the vertical rod, an adjusting mechanism matched with the cable is arranged. The adjusting mechanism includes a bearing wheel and a lifting part. The lifting part is connected with the bearing wheel. The bearing wheel includes two groups of relatively distributed second rotating disks. Two groups of relatively distributed second guide rollers are jointly rotatably connected to the two groups of second rotating disks. Inside the vertical rod, a vibration mechanism matched with the first rotating disk is arranged. The vibration mechanism includes a connecting rod and a jitter part. One end of the supporting rod is rotatably connected to the surface of the first rotating disk, and the other end of the supporting rod is connected with the jitter part. When it is specifically implemented, the bearing wheel is mainly lifted by a motor to change the force exerted by the bearing wheel on the cable, thereby realizing the adjustment of the cable tension. This solution involves the control and use of a motor, and the operation control is relatively troublesome. There may be a situation of untimely adjustment. If a cable tension detection mechanism or a cable sag detection mechanism is considered to be added to achieve linkage control, the overall structure is relatively complex and the cost is relatively high.

[0004] Furthermore, Chinese patent document CN220775336U discloses a power line sag tool, comprising: a base, the top of which is fixedly connected to a utility pole; and a support mechanism for adjusting cable sag, the support mechanism being installed on the top of the utility pole surface. By setting up the support mechanism, when adjusting the sag of the cable body, an electric push rod drives one end of an L-shaped adjusting rod to move up and down at the bottom of the mounting plate. The L-shaped adjusting rod is connected to a pivot on one side of the bottom of a crossbar, causing one end of the crossbar to tilt upwards. Then, a support wheel rotates and supports the cable body, lifting both ends of the cable body and expanding them to the sides of the crossbar. This solution involves the control and use of an electric push rod, and shares the same drawbacks as the technical solution provided in Chinese patent document CN216971592U. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a cable tension adjustment device on power poles, which has a simple and reliable structure and is easier to implement.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: a cable tension adjustment device on a power pole, including a pole frame and a cable. A set of limiting wheels is installed on the front and rear sides of the top of the pole frame via brackets. Each set of limiting wheels includes a first limiting wheel on the left side of the pole frame and a second limiting wheel on the right side of the pole frame. The first and second limiting wheels are used to provide rolling support for the cable. An automatic tension adjustment mechanism for adjusting cable tension is correspondingly provided between each set of first and second limiting wheels. The automatic tension adjustment mechanism includes a sliding plate and a fixed plate. A vertically arranged slide rail is provided on the side of the pole frame. The sliding plate is slidably connected to the side of the pole frame via the slide rail. A rotating shaft is fixed on the top of the sliding plate, and a coaxial device is rotatably sleeved on the rotating shaft. The arrangement includes pulley A and a traction pulley. The pulley groove of the traction pulley is engaged with the upper part of the cable. Pulley B is rotatably installed at the bottom of the slide plate. A fixed plate is fixedly installed on the side of the tower frame and located below the vertical slide rail. Pulley C is rotatably installed on the top of the fixed plate, and pulley D is rotatably installed on the bottom of the fixed plate. A cable is fixed to the bottom of the slide plate. The end of the cable away from the slide plate passes around pulley C, pulley B, pulley D, and pulley A in sequence, and extends to the bottom of the fixed plate before connecting to a counterweight assembly. The axes of pulley A, traction pulley, pulley B, pulley C, pulley D, and limit wheel are all arranged horizontally along the front-back direction. The pulley group composed of pulley A, pulley B, pulley C, and pulley D makes the vertical pressure applied to the cable by the traction pulley greater than the weight of the counterweight assembly itself.

[0007] To ensure a simple and reliable structure, a further preferred embodiment is that pulleys B, C, and D are all located directly below pulley A, and the diameter of pulley B = the diameter of pulley C < the diameter of pulley D < the diameter of pulley A.

[0008] To ensure a simple and reliable structure, a further preferred option is that, in the horizontal direction, the traction wheel is positioned at the center between the first and second limit wheels.

[0009] To better ensure the safety of the power system, a further preferred option is that the limit wheel, pulley A, traction wheel, pulley B, pulley C, and pulley D are all made of ceramic material.

[0010] To make the structure simple, reliable, and easy to assemble and implement, a further preferred embodiment is that the counterweight assembly includes a box and multiple counterweight blocks. A vertically arranged limiting rod is fixedly connected inside the box, and the counterweight blocks are clamped inside the box by the limiting rod. The side of the counterweight block has a slot for the limiting rod to be clamped in.

[0011] To ensure a simple, reliable structure that is easy to assemble and implement, a further preferred option is to fix vertically arranged sliding rods on the side of the tower frame, and to slide the box body on the side of the tower frame via the sliding rods.

[0012] To make the structure more reliable, a further preferred option is that the limiting rods are arranged in parallel, and each counterweight has a slot that corresponds to one of the limiting rods.

[0013] To make the structure more reliable, a further preferred embodiment is that the counterweight has a sliding cavity inside that communicates with two slots. Two locking blocks are slidably connected inside the sliding cavity, with the two blocks located at opposite ends of the cavity. A compression spring is installed inside the sliding cavity, positioned between the two locking blocks. Each locking block has a limiting protrusion on its side, and the inner wall of the sliding cavity has a limiting cavity that mates with the limiting protrusion. When the compression spring is in its natural state, the limiting protrusion abuts against the end face of the limiting cavity, and one end of the locking block extends into the slot. For the end of the locking block extending into the slot, two driving guide surfaces are provided on the two sides corresponding to the directions facing the limiting rod into the slot and the directions away from the limiting rod into the slot. The driving guide surfaces are curved or inclined. When the limiting rod enters the slot or disengages from the slot, the limiting rod contacts the driving guide surface, which can compress the locking block back into the sliding cavity.

[0014] To make the structure more reliable, a further preferred option is that the two adjacent counterweights are engaged and positioned by a positioning boss and a positioning slot.

[0015] The beneficial effects of this invention are as follows: By utilizing the weight of the counterweight assembly and pulling the slide plate downwards with the cable, the cable is kept taut, preventing it from sagging significantly. Simultaneously, the pulley system structure consisting of pulleys A, B, C, and D allows the pulling force on the slide plate to be several times the weight of the counterweight assembly. This means that a lighter counterweight assembly is sufficient to achieve a large downward pulling force on the slide plate and cable. In other words, while ensuring sufficient pulling force on the cable, the weight of the counterweight assembly is reduced, thereby reducing the load on the tower and increasing its service life.

[0016] In practical implementation, the counterweight component pulls the cable downwards. Due to the cable's thermal expansion and contraction, it elongates at higher temperatures. At this time, the counterweight component moves downwards to keep the cable taut, preventing it from slack. Conversely, at lower temperatures, the cable contracts. When the contraction force is greater than the vertical pressure applied to the cable by the counterweight component, the counterweight component moves upwards to prevent the cable from becoming overly taut, thus avoiding excessive stress on the top of the tower and affecting its service life. This invention maintains a reasonable cable tension at both high and low temperatures, preventing significant cable sag or excessive tension. Furthermore, the counterweight component provides adaptive adjustment, eliminating the need for additional moving parts and control systems, greatly improving operational convenience.

[0017] This invention provides a counterweight assembly with multiple detachable counterweight blocks, which allows for adjustment of the counterweight assembly's own weight according to the force applied during implementation, and also makes it easy to secure the counterweight blocks inside the housing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a front view structural diagram of the present utility model;

[0020] Figure 3 This is a three-dimensional structural diagram of the top of the central tower frame of this utility model;

[0021] Figure 4 This is a three-dimensional structural diagram of the automatic tension adjustment mechanism in this utility model. Figure 1 ;

[0022] Figure 5 This is a cross-sectional view of pulleys A, B, C and D in this utility model;

[0023] Figure 6 This is a three-dimensional structural diagram of the automatic tension adjustment mechanism in this utility model. Figure 2 ;

[0024] Figure 7 This is a three-dimensional structural diagram of the counterweight component in this utility model;

[0025] Figure 8 This is a three-dimensional structural diagram of the counterweight in this utility model;

[0026] Figure 9 This is a top-section structural diagram of the counterweight block in this utility model.

[0027] The following are marked in the diagram: 1. Pole tower; 2. Support; 3. Limiting wheel; 4. Slide rail; 5. Slide plate; 6. Rotating shaft; 7. Pulley A; 8. Pulling wheel; 9. Pulley B; 10. Fixing plate; 11. Pulley C; 12. Pulley D; 13. Cable; 14. Counterweight assembly; 141. Box; 142. Limiting rod; 143. Counterweight block; 1431. Slot; 1432. Slide cavity; 1433. Locking block; 1434. Compression spring; 1435. Positioning boss; 15. Slide rod; 16. Cable. Detailed Implementation

[0028] The present invention will be further described below with reference to the accompanying drawings. It should be noted that the limitations on the front, back, left, and right directions in the present invention are merely for the purpose of facilitating understanding of the technical solution.

[0029] like Figures 1 to 6 As shown, this utility model includes a pole tower 1 and a cable 16. A set of limiting wheels 3 are mounted on the front and rear sides of the top of the pole tower 1 via brackets 2. Each set of limiting wheels 3 includes a first limiting wheel on the left side of the pole tower 1 and a second limiting wheel on the right side of the pole tower 1. The first and second limiting wheels provide rolling support for the cable 16 (i.e., the limiting wheels 3 are essentially rotatable). The limiting wheels 3 can be broadly interpreted; generally, the cable 16 is simply snapped into the annular groove of the limiting wheel 3. Alternatively, existing technology can be consulted, using spaced tension rollers to achieve rolling support for the cable 16. The brackets 2 only need to provide support for the limiting wheels 3 and install the limiting wheels 3 in the designed positions.

[0030] Each set of first and second limit wheels is respectively equipped with an automatic tension adjustment mechanism for adjusting the tension of cable 16, which is equivalent to the automatic tension adjustment mechanism being installed on the front and rear sides of the pole tower 1 respectively.

[0031] The automatic tension adjustment mechanism includes a sliding plate 5 and a fixed plate 10. A vertically arranged slide rail 4 is provided on the side of the tower frame 1, and the sliding plate 5 is slidably connected to the side of the tower frame 1 via the slide rail 4. The vertical arrangement of the slide rail 4 means that the sliding plate 5 is positioned vertically in the direction of movement. The slide rail 4 can be interpreted broadly as long as it provides sliding guidance for the sliding plate 5. In this embodiment, a groove is preferably directly formed on the side of the tower frame 1. In some alternative embodiments, the slide rail 4 can also be an external, independent component.

[0032] A rotating shaft 6 is fixed to the top of the slide plate 5. A pulley A7 and a traction wheel 8 are rotatably connected to the rotating shaft 6, arranged coaxially. The pulley groove of the traction wheel 8 engages above the cable 16, meaning the cable 16 is essentially positioned within the pulley groove at the bottom of the traction wheel 8. The cable 16 and the traction wheel 8 form a rolling fit, and the traction wheel 8 applies downward pressure to the cable 16. A pulley B9 is rotatably mounted at the bottom of the slide plate 5. A fixing plate 10 is fixedly installed on the side of the tower frame 1, located below the vertical slide rail 4. A pulley C11 is rotatably mounted on the top of the fixing plate 10, and a pulley D12 is rotatably mounted on the bottom of the fixing plate 10. A cable 13 is fixed to the bottom of the slide plate 5, with the end of the cable 13 furthest from the slide plate 5 arranged sequentially... A counterweight assembly 14 is connected after passing pulleys C11, B9, D12, and A7 and extending below the fixed plate 10. The axes of pulleys A7, traction wheel 8, B9, C11, D12, and limit wheel 3 are all arranged horizontally along the front-to-back direction. The pulley group formed by pulleys A7, B9, C11, and D12 ensures that the vertical pressure applied to the cable 16 by the traction wheel 8 is greater than the weight of the counterweight assembly 14 itself. The specific multiple of the weight can be flexibly designed according to the actual situation. The pulling force on the slide plate 5 is several times the weight of the counterweight assembly 14, meaning that a relatively light counterweight assembly 14 can achieve a large downward pulling force on the slide plate 5 and the cable 16. In other words, while ensuring the pulling force on the cable 16, the weight required for the counterweight assembly 14 can be reduced, thereby reducing the load on the pole tower 1 and increasing the service life of the pole tower 1.

[0033] The design principle of this utility model is as follows: the counterweight component 14 pulls the cable 16 downwards. Due to the thermal expansion and contraction of the cable 16 itself, when the temperature is high, the cable 16 elongates. At this time, the counterweight component 14 moves downwards to keep the cable 16 taut, thus preventing the cable 16 from slack. Conversely, when the temperature is low, the cable 16 contracts. When the contraction force is large, i.e., the contraction force of the cable 16 is greater than the sliding plate 5 and the downward pulling force on the cable 16, the counterweight component 14 moves upwards to prevent the cable 16 from becoming excessively taut, thus avoiding excessive stress on the top of the pole tower 1 and affecting its service life. In summary, this utility model can keep the cable 16 in a reasonable taut state at both high and low temperatures, preventing the cable 16 from sag significantly or become excessively taut.

[0034] In some preferred embodiments, pulleys B9, C11, and D12 are all located directly below pulley A7, and the diameter of pulley B9 = the diameter of pulley C11 < the diameter of pulley D12 < the diameter of pulley A7. This creates a more reasonable pulley assembly structure and reduces friction on cable 13.

[0035] In some preferred embodiments, the pull wheel 8 is positioned horizontally at the center between the first and second limiting wheels. This means the vertical distance between the axis of the pull wheel 8 and the axis of the first limiting wheel in the horizontal direction is equal to the vertical distance between the axis of the pull wheel 8 and the axis of the second limiting wheel in the horizontal direction. This results in a more balanced overall force distribution.

[0036] In some preferred embodiments, the limiting wheel 3, pulley A7, traction wheel 8, pulley B9, pulley C11, and pulley D12 are all made of ceramic material. It is understood that the specific strength of the selected ceramic material should meet the design requirements. The overall use of ceramic material for all components facilitates implementation and effectively ensures the insulation between the cable 16 and the tower 1.

[0037] Further reading Figures 7 to 9 In some preferred embodiments, the counterweight assembly 14 includes a housing 141 and a plurality of counterweight blocks 143. A vertically arranged limiting rod 142 is fixedly connected inside the housing 141. The counterweight blocks 143 are snapped into the housing 141 by the limiting rod 142. The side of the counterweight block 143 has a slot 1431 for the limiting rod 142 to be snapped into. The counterweight blocks 143 being snapped into the housing 141 by the limiting rod 142 can better ensure structural safety and prevent the counterweight blocks 143 from falling accidentally. At the same time, the snap-fit ​​method of the counterweight blocks 143 also makes it easy to adjust the weight of the counterweight assembly 14 itself by adding, removing or replacing the counterweight blocks 143 according to the stress conditions during implementation. It is understood that in some alternative embodiments, the counterweight blocks 143 can also be directly connected to the cable 13 by connecting components such as lifting rings. In some alternative embodiments, the counterweight 143 can also be directly supported and fixed by the support base plate, and the support base plate can also be equipped with a limiting rod 142 to hold multiple counterweights 143.

[0038] In some preferred embodiments, a vertically arranged sliding rod 15 is fixedly provided on the side of the pole tower 1, and the housing 141 is slidably mounted on the side of the pole tower 1 via the sliding rod 15, which ensures that the counterweight assembly 14 can move up and down more smoothly. It is understood that in some alternative embodiments, the counterweight assembly 14 may also be directly suspended in the air.

[0039] In some preferred embodiments, the limiting rods 142 are two rods arranged side by side, and each counterweight 143 has a slot 1431 that corresponds one-to-one with the limiting rod 142, so as to further improve the reliability of the guide structure.

[0040] In some preferred embodiments, the counterweight 143 has a sliding cavity 1432 communicating with two slots 1431. Two locking blocks 1433 are slidably connected inside the sliding cavity 1432, with the two locking blocks 1433 located at opposite ends of the sliding cavity 1432. A compression spring 1434 is disposed inside the sliding cavity 1432, located between the two locking blocks 1433. Each locking block 1433 has a limiting protrusion on its side, and the inner wall of the sliding cavity 1432 has a limiting cavity that mates with the limiting protrusion. When the compression spring 1434 is in its natural state, the limiting protrusion abuts against the end face of the limiting cavity, and one end of the locking block 1433 extends into the slot 1431. For the end of the locking block 1433 extending into the slot 1431, the locking block 1433, facing the limiting... Both sides corresponding to the direction in which the limiting rod 142 engages with the slot 1431 and the direction in which the limiting rod 142 engages with the slot 1431 are provided with driving guide surfaces. The driving guide surfaces are arc-shaped or inclined. When the limiting rod 142 engages with the slot 1431 or when the limiting rod 142 disengages from the slot 1431, the limiting rod 142 contacts the driving guide surface and can squeeze the block 1433 back into the sliding cavity 1432. After the limiting rod 142 is engaged in place or after the limiting rod 142 is completely disengaged from the slot 1431, under the restoring force of the compression spring 1434, the block 1433 returns to its initial state (i.e., the limiting protrusions on the side of the block 1433 abut against the end face of the limiting cavity, and one end of the block 1433 extends into the slot 1431). With the above structure, when the counterweight 143 is installed inside the housing 141, the two slots 1431 of the counterweight 143 are respectively locked to the outside of the two limiting rods 142. At the same time, the compression spring 1434 pushes the two locking blocks 1433 to engage with the outside of the two limiting rods 142, thus securing the counterweight 143 inside the housing 141. The locking blocks 1433 can limit the limiting rods 142, preventing them from detaching from the slots 1431, thereby better ensuring structural safety.

[0041] In some preferred embodiments, two adjacent counterweights 143 are engaged with positioning slots via positioning bosses 1435, facilitating the mounting of multiple counterweights 143 inside the housing 141 and ensuring their stability within the housing 141. In a preferred embodiment, each counterweight 143 has a positioning boss 1435 on its upper surface and a corresponding positioning slot on its bottom surface. In some alternative embodiments, each counterweight 143 may also have a positioning boss 1435 on its lower surface and a corresponding positioning slot on its top surface. In this alternative embodiment, a corresponding positioning slot needs to be added to the upper surface of the bottom plate of the housing 141. In some alternative embodiments, the bottommost counterweight 143 may be designed with a horizontal bottom surface and a positioning slot only on the top surface, while the other counterweights 143 have positioning bosses 1435 on their lower surfaces and positioning slots corresponding to the positioning bosses 1435 on their top surfaces.

[0042] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A cable tension adjustment device on a power pole, comprising a pole frame (1) and a cable (16), wherein a set of limiting wheels (3) are respectively installed on the front and rear sides of the top of the pole frame (1) via brackets (2), each set of limiting wheels (3) includes a first limiting wheel located on the left side of the pole frame (1) and a second limiting wheel located on the right side of the pole frame (1), the first limiting wheel and the second limiting wheel being used to provide rolling support for the cable (16), and an automatic tension adjustment mechanism for adjusting the tension of the cable (16) is respectively provided between each set of first limiting wheels and second limiting wheels, characterized in that: The tension automatic adjustment mechanism includes a sliding plate (5) and a fixed plate (10). A vertically arranged slide rail (4) is provided on the side of the tower (1). The sliding plate (5) is slidably connected to the side of the tower (1) through the slide rail (4). A rotating shaft (6) is fixed on the top of the sliding plate (5). A pulley A (7) and a traction wheel (8) are rotatably sleeved on the rotating shaft (6). The pulley groove of the traction wheel (8) is engaged above the cable (16). A pulley B (9) is rotatably installed at the bottom of the sliding plate (5). A fixing plate (10) is fixedly installed on the side of the pole tower (1) and located below the vertical slide rail (4). A pulley C (11) is rotatably installed on the top of the fixing plate (10), and a pulley D (12) is rotatably installed on the bottom of the fixing plate (10). A cable (13) is fixed to the bottom end of the slide plate (5). The end of the cable (13) away from the slide plate (5) passes around pulley C (11), pulley B (9), pulley D (12) and pulley A (7) in sequence, and extends... A counterweight assembly (14) is connected below the fixed plate (10). The axes of pulley A (7), pulley (8), pulley B (9), pulley C (11), pulley D (12) and limit wheel (3) are all arranged horizontally along the front-back direction. The pulley group composed of pulley A (7), pulley B (9), pulley C (11) and pulley D (12) makes the vertical pressure applied by the pulley (8) to the cable (16) greater than the weight of the counterweight assembly (14).

2. The cable tension adjustment device on the power pole as described in claim 1, characterized in that: Pulleys B (9), C (11) and D (12) are all located directly below pulley A (7). The diameter of pulley B (9) = the diameter of pulley C (11) < the diameter of pulley D (12) < the diameter of pulley A (7).

3. The cable tension adjusting device on the power pole as described in claim 1, characterized in that: In the horizontal direction, the pull wheel (8) is positioned at the center between the first limit wheel and the second limit wheel.

4. The cable tension adjusting device on the power pole as described in claim 1, characterized in that: The limiting wheel (3), pulley A (7), traction wheel (8), pulley B (9), pulley C (11) and pulley D (12) are all made of ceramic material.

5. The cable tension adjusting device on the power pole as described in any one of claims 1 to 4, characterized in that: The counterweight assembly (14) includes a box (141) and multiple counterweight blocks (143). A vertically arranged limiting rod (142) is fixedly connected inside the box (141). The counterweight blocks (143) are clamped inside the box (141) by the limiting rod (142). The side of the counterweight block (143) has a slot (1431) for the limiting rod (142) to be inserted.

6. The cable tension adjusting device on the power pole as described in claim 5, characterized in that: A vertically arranged sliding rod (15) is fixedly installed on the side of the tower frame (1), and the box (141) is slidably installed on the side of the tower frame (1) via the sliding rod (15).

7. The cable tension adjusting device on the power pole as described in claim 5, characterized in that: The limiting rods (142) are two rods arranged side by side, and each counterweight (143) has a slot (1431) that corresponds to the limiting rod (142).

8. The cable tension adjusting device on the power pole as described in claim 7, characterized in that: The counterweight (143) has a sliding cavity (1432) inside that communicates with two slots (1431). Two locking blocks (1433) are slidably connected inside the sliding cavity (1432), with the two locking blocks (1433) located at opposite ends of the sliding cavity (1432). A compression spring (1434) is installed inside the sliding cavity (1432) between the two locking blocks (1433). Each locking block (1433) has a limiting protrusion on its side, and the inner wall of the sliding cavity (1432) has a limiting cavity that mates with the limiting protrusion. When the compression spring (1434) is in its natural state, the limiting protrusion abuts against the end face of the limiting cavity, and the locking blocks ( One end of the block (1433) extends into the slot (1431); for the end of the block (1433) extending into the slot (1431), the two sides corresponding to the direction of the block (1433) facing the limit rod (142) into the slot (1431) and the direction of the block (1433) facing away from the limit rod (142) into the slot (1431) are provided with driving guide surfaces. The driving guide surfaces are arc-shaped or inclined surfaces. When the limit rod (142) is inserted into the slot (1431) or when the limit rod (142) is disengaged from the slot (1431), the limit rod (142) contacts the driving guide surface and can squeeze the block (1433) back into the slide cavity (1432).

9. The cable tension adjusting device on the power pole as described in claim 5, characterized in that: The two adjacent counterweights (143) are engaged with the positioning slots through the positioning boss (1435).

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