CN114512949B - A cable suspension fitting for overhead transmission lines - Google Patents

Abstract

The invention discloses a cable suspension fitting for an overhead transmission line, which comprises a lower clamping plate and a movable cover plate, wherein a plurality of fixing screws are arranged at the lower part of the lower clamping plate and fixedly arranged on a cable bridge; be equipped with the arc recess that holds the cable on the lower plate, removable cover one end is articulated with the lower plate, and the other end passes through bolt detachably with the lower plate and is connected, and removable cover is inside to be equipped with the link, and the link inboard is equipped with a plurality of punch holder, and the punch holder is V-arrangement structure, and punch holder upper portion both ends are articulated with the link, and the opening part of punch holder is equipped with the arc recess that holds the cable, and link upper portion swing joint has first adjusting screw. According to the invention, the upper clamping plate is of an inverted V-shaped structure, when the cable slides in the hardware fitting, the friction force between the cable and the upper clamping plate drives the upper clamping plate to rotate, one side of the upper clamping plate pressurizes the cable downwards, so that the sliding of the cable is avoided, and the connection stability of the cable and the hanging hardware fitting is ensured.

Description

A cable suspension fitting for overhead transmission lines

Technical field

The invention belongs to the technical field of cable erection hardware, and particularly relates to a cable suspension hardware for overhead transmission lines.

Background technique

Compared with underground transmission lines, overhead lines have low construction costs, short construction periods, and are easy to repair and maintain. They have been the main transmission method used since the development of the electric power industry. Usually called transmission lines refer to overhead transmission lines. Through overhead lines Connect power stations, substations, and load points in different areas to transmit or exchange electric energy to form a power network or distribution network of various voltage levels. Overhead transmission lines consist of line towers, conductors, insulators, line fittings, guy wires, and tower foundations. , grounding device and other components, erected above the ground.

There are generally two ways to hang existing transmission lines. One is to use insulators as cable supports and tie the cables to the insulators. This fixing method has many flaws and shortcomings. First, the binding process is complicated and requires a high degree of proficiency, making it inconvenient to work at high places. Moreover, in strong wind areas, vibration occurs between the cable and the binding wire, and the binding wire is easy to loosen, causing the cable to slip. .

Another way is to use line fittings to fix the cables on the cable bridge. For example, the Chinese invention patent application with publication number CN114094525A discloses a wire and pipeline fixing device, which discloses the following features: it includes a fixed frame, and the fixing device The upper part of the frame is provided with a fixed bar. The middle part of the fixed frame is provided with fixed clamping parts and movable clamping parts respectively from top to bottom. The lower part of the fixed clamping part is provided with two sets of arc-shaped bearing parts. The upper part of the movable clamping part is provided with a second arc bearing part. The first arc bearing part and the second arc bearing part correspond to each other. The lower part of the movable clamping part is provided with a locking rod, and the locking rod is fixed through The lower border of the frame. Although it reduces the difficulty of cable suspension and improves the efficiency of cable suspension, in a strong wind environment, the cable will still cause the cable to slide when it swings.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art and provide a cable suspension fitting for overhead transmission lines to solve the problem that cable swings in harsh environments such as strong winds can easily cause the cable to slide from the suspension fitting, ensuring that the cable is suspended stability.

In order to achieve the above objects, the technical solution adopted by the present invention is:

A cable suspension fitting for overhead transmission lines, including a lower plywood and a movable cover. The lower part of the lower plywood is provided with a number of fixed screws, and the fixed screws are fixedly installed on the cable bridge; the lower plywood is provided with a cable accommodating plate. An arc-shaped groove, one end of the movable cover is hinged to the lower plywood, and the other end is removably connected to the lower plywood through bolts. There is a connecting frame inside the movable cover, and several upper plywood are provided inside the connecting frame. , the upper splint has a V-shaped structure, and the upper two ends of the upper splint are hinged with the connecting frame. The opening of the upper plying plate is provided with an arc-shaped groove to accommodate the cable, and the upper part of the connecting frame is movably connected with a first adjusting screw. , the upper end of the first adjusting screw passes through the movable cover and is threadedly connected with the movable cover.

As a further preference of this technical solution, both ends of the arc-shaped groove of the lower plywood and the arc-shaped groove of the upper plywood are provided with rounded corners, which prevents the ends of the upper and lower plywood from cutting the cable when the cable swings. The upper part of the arc-shaped groove of the lower plywood and the lower part of the arc-shaped groove of the upper plywood are equipped with anti-slip rubber pads, which not only prevents the cable from slipping in the hanging fittings, but also reduces the impact of the hanging fittings on the cable when the cable shakes. wear and tear.

As a further preference of the present technical solution, a plurality of first installation grooves are provided inside the lower splint, and a first anti-return mechanism is provided inside the first installation grooves. The first anti-return mechanism includes a support frame and a support frame. The ram inside the frame is provided with V-shaped guide grooves on both sides of the support frame. The upper part of the ram is provided with an arc-shaped groove that matches the arc-shaped groove of the lower plywood. The two sides of the ram are There is a guide rod at the end. The guide rod is slidably installed inside the V-shaped guide groove. In the initial state, the guide rod is located at the bottom of the V-shaped guide groove. At this time, the ram protrudes from the arc-shaped groove of the lower plywood; due to the upper The plywood and lower plywood clamp the cable. There is friction between the cable and the ram. When the cable slides between the upper plywood and the lower plywood, the friction between the cable and the ram drives the ram to the left or right in the support frame. Sliding, the guide rod simultaneously drives the ram to move upward under the guidance of the V-shaped guide groove, increasing the friction between the cable and the ram, thus preventing the cable from sliding.

As a further preference of this technical solution, a number of springs are provided on both sides of the ram, and the other end of the spring is against the inner wall of the support frame. The spring ensures that the ram is at the bottom of the V-shaped guide groove in the initial state, thereby The anti-return effect of the first anti-return mechanism is guaranteed.

As a further preference of this technical solution, a second adjusting screw is movably connected to the lower part of the support frame. The lower end of the second adjusting screw extends through the first installation groove to the lower part of the lower clamping plate, and the second adjusting screw is threaded with the lower clamping plate. connection, the second adjusting screw is convenient for adjusting the height of the first anti-return mechanism, so that sufficient friction is formed between the ram and the cable, thereby ensuring the anti-return effect of the first anti-return mechanism, and is suitable for use with cables of different diameters.

As a further preference of this technical solution, the first anti-return mechanism is arranged in the middle of the opening of the upper plywood. When the cable slides, the ram of the first anti-return mechanism moves upward, causing the cable to form a wave between the upper plywood and the ram. The shape structure further ensures the anti-reverse effect of the cable and ensures the stability of the cable suspension.

As a further preference of the present technical solution, extension plates are provided at both ends of the lower plywood, and a second anti-return mechanism is provided on the extension plate. The second anti-return mechanism includes an arc-shaped groove provided on one side of the lower plywood. The first turntable and the second turntable provided on the other side of the arc-shaped groove of the lower splint, the cable is provided between the first turntable and the second turntable, and in the initial state, the side walls of the first turntable and the second turntable are both In contact with the cable; the lower parts of the first turntable and the second turntable are equipped with eccentric shafts, and the eccentric shaft is arranged on the side close to the cable, and the lower end of the eccentric shaft is rotationally connected to the extension plate; the cable is provided with an A hoop connected by cable clamping. The upper part of the hoop is hinged with connecting rods on both sides. The other end of the connecting rod is hinged with the first turntable or the second turntable, and its hinge point is eccentrically arranged with the first turntable or the second turntable. ; When the cable slides in the suspension fitting, it drives the hoop to move left or right, and the hoop drives the first turntable and the second turntable to rotate around the eccentric shaft through the connecting rod. Since the eccentric shaft is eccentrically arranged with the first turntable and the second turntable , at this time, the first turntable and the second turntable form a cam structure. When the first turntable and the second turntable rotate eccentrically, the ends of the first turntable and the second turntable close to the hinge point of the connecting rod deflect toward the cable side, thereby clamping the cable , realizing the secondary check of cable suspension.

As a further preference of this technical solution, the extension plate is provided with a second installation groove, a slide block is slidably connected in the second installation groove, a bearing is provided on the slide block, and the lower end of the eccentric shaft is fixedly installed In the inner ring of the bearing, a third adjustment screw is movably connected to one side of the slider. One end of the third adjustment screw extends to the outside of the extension plate and is threadedly connected to the extension plate; the slider and the third adjustment screw are used for adjustment. The distance between the first turntable and the second turntable is suitable for use with cables of different diameters.

As a further preference of this technical solution, grooves are provided on the side walls of the first turntable and the second turntable to increase the contact area between the first turntable and the second turntable and the cable. The two turntables are arranged staggered; when the cable slides in the hanging fittings, the first turntable and the second turntable rotate in opposite directions, so that the cable forms a wavy structure between the first turntable and the second turntable, and the cable passes between the first turntable and the second turntable. The wavy structure formed between the second turntable and the wavy structure formed between the upper plywood and the ram of the cable are perpendicular to each other, so that the cable forms a space check structure and avoids the sliding of the cable as much as possible.

As a further preference of this technical solution, the connecting rod includes a double-headed stud and a connecting sleeve threadedly connected to both ends of the double-ended stud. The connecting sleeve at one end is hingedly connected to the hoop, and the connecting sleeve at the other end is connected to the first turntable or the third turntable. The two turntables are hinged; the double-headed studs make it easy to adjust the length of the connecting rod, and adjust the angle between the connecting rods on both sides to the maximum to ensure the sensitivity of the second anti-return mechanism when it is anti-return.

The beneficial effects of the present invention are:

1) The present invention sets the upper plywood into an inverted V-shaped structure. When the cable slides in the fitting, the friction between the cable and the upper plywood drives the upper plywood to rotate, and one side of the upper plywood pressurizes the cable downward, thus avoiding The sliding of the cable ensures the stability of the connection between the cable and the hanging hardware.

2) In order to prevent the cable from being damaged by the hanging hardware, the present invention is provided with rounded corners at the contact points between the lower and upper splints and the cable, and is provided with anti-slip rubber at the contact points between the upper and lower splints and the cable.

3) The present invention is provided with several first anti-return mechanisms in the lower plywood. Since the upper plywood and the lower plywood clamp the cable, there is friction between the cable and the ram. When the cable slides between the upper plywood and the lower plywood, the cable The friction between the cable and the ram drives the ram to slide left or right in the support frame. The guide rod simultaneously drives the ram upward under the guidance of the V-shaped guide groove, increasing the friction between the cable and the ram. Avoids cable slipping.

4) In order to ensure the anti-return effect of the first anti-return mechanism, a number of springs are installed on both sides of the ram so that the ram is at the bottom of the V-shaped guide groove in the initial state so that the ram can respond quickly when the cable slides. Stop reversal.

5) A second adjustment screw is provided at the lower part of the support frame of the first anti-return mechanism to adjust the height of the first anti-return mechanism so that sufficient friction is formed between the ram and the cable, thereby ensuring the stability of the first anti-return mechanism. Anti-return effect, and suitable for use with cables of different diameters.

6) Set the first anti-return mechanism in the middle of the opening of the upper plywood. When the cable slides, the ram of the first anti-return mechanism moves upward, causing the cable to form a wavy structure between the upper plywood and the ram, further ensuring that the cable The anti-return effect ensures the stability of cable suspension.

7) A second anti-return mechanism is set up on both sides of the lower splint. When the cable slides in the suspension fitting, it drives the hoop to move to the left or right. The hoop drives the first turntable and the second turntable to rotate around the eccentric axis through the connecting rod. , since the eccentric shaft is eccentrically arranged with the first turntable and the second turntable, the first turntable and the second turntable form a cam structure at this time. When the first turntable and the second turntable rotate eccentrically, the first turntable and the second turntable are hinged close to the connecting rod. One end of the point is deflected to one side of the cable, thereby clamping the cable and achieving secondary backstop for cable suspension.

8) A second installation groove is provided on the extension plate, an adjustable slide block is provided in the second installation groove, and a second anti-return mechanism is installed on the slide block to facilitate adjustment of the first turntable and the second turntable. The spacing is suitable for use with cables of different diameters.

9) The present invention arranges the first turntable and the second turntable in a staggered manner; when the cable slides in the hanging fittings, the first turntable and the second turntable rotate in opposite directions, so that the cable forms between the first turntable and the second turntable. Wave structure, and the wave-shaped structure formed by the cable between the first turntable and the second turntable is perpendicular to the wave-shaped structure formed by the cable between the upper plywood and the ram, so that the cable forms a space check structure and avoids the cable as much as possible. of sliding.

10) The connecting rod of the present invention is configured as a length-adjustable structure. In the initial state, the angle between the connecting rods on both sides is adjusted to the maximum to ensure the sensitivity of the second anti-return mechanism when it is anti-return.

Description of the drawings

Figure 1 is a schematic structural diagram of a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 2 is a diagram of a cable suspension fitting for overhead transmission lines in use according to the present invention.

Figure 3 is a diagram of the open state of the movable cover of a cable suspension fitting used for overhead transmission lines according to the present invention.

Figure 4 is a schematic structural diagram of a connecting frame in a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 5 is a schematic structural diagram of the middle and lower splints of a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 6 is a cross-sectional view of the middle and lower splints of a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 7 is a schematic structural diagram of the first anti-return mechanism in a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 8 is a schematic structural diagram of a second anti-return mechanism in a cable suspension fitting for overhead transmission lines according to the present invention.

Figure 9 is a schematic structural diagram of a slider in a cable suspension fitting for overhead transmission lines according to the present invention.

In the picture: 1. Lower splint; 101. First mounting slot; 102. Second mounting slot; 103. Extension plate; 104. Fixed screw; 2. Movable cover; 201. Connecting frame; 202. Upper splint; 203. The first adjusting screw; 3. The first non-return mechanism; 301. Ram; 302. Support frame; 303. V-shaped guide groove; 304. Guide rod; 305. Spring; 306. The second adjusting screw; 4. The second Anti-return mechanism; 401, first turntable; 402, connecting rod; 4021, connecting sleeve; 4022, double-headed stud; 403, eccentric shaft; 404, hoop; 405, second turntable; 406, slider; 407, Bearing; 408, third adjusting screw; 5, cable; 6, cable bridge.

Detailed ways

The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It is implied that the indicated device or element must have a specific orientation, specific orientation construction and operation, and therefore is not to be construed as a limitation of the invention.

As shown in Figures 1-4, a cable suspension fitting for overhead transmission lines includes a lower splint 1 and a movable cover 2. The lower part of the lower splint 1 is provided with a number of fixing screws 104, and the fixing screws 104 are fixedly installed on On the cable bridge 6; the lower plywood 1 is provided with an arc-shaped groove to accommodate the cable 5. One end of the movable cover 2 is hinged to the lower plywood 1, and the other end is removably connected to the lower plywood 1 through bolts. There is a connecting frame 201 inside the movable cover 2. There are a number of upper splints 202 on the inside of the connecting frame 201. The upper plying plates 202 have a V-shaped structure, and the upper ends of the upper plying plate 202 are hinged with the connecting frame 201. The opening of the clamping plate 202 is provided with an arc-shaped groove for accommodating the cable 5. A first adjusting screw 203 is movably connected to the upper part of the connecting frame 201. The upper end of the first adjusting screw 203 penetrates the movable cover 2 and is threadedly connected to the movable cover 2. .

In this embodiment, both ends of the arc-shaped groove of the lower plywood 1 and the arc-shaped groove of the upper plywood 202 are provided with rounded corners, which prevents the ends of the upper plywood 202 and the lower plywood 1 from swinging when the cable 5 swings. If the cable 5 is cut, the upper part of the arc-shaped groove of the lower plywood 1 and the lower part of the arc-shaped groove of the upper plywood 202 are equipped with anti-slip rubber pads, which not only prevents the cable 5 from slipping in the hanging fittings, but also reduces the risk of the cable. 5. The wear of the cable 5 caused by the hanging hardware when shaking.

As shown in Figures 5-7, in this embodiment, a plurality of first installation grooves 101 are provided inside the lower plywood 1, and a first anti-return mechanism 3 is provided inside the first installation grooves 101. The anti-return mechanism 3 includes a support frame 302 and a ram 301 arranged inside the support frame 302. V-shaped guide grooves 303 are provided on both sides of the support frame 302. The upper part of the ram 301 is provided with a connection with the lower splint 1. The arc groove matches the arc groove. Guide rods 304 are provided at both ends of the ram 301. The guide rods 304 are slidably disposed inside the V-shaped guide groove 303. In the initial state, the guide rods 304 are located in the V-shaped guide groove 303. At the bottom of the guide groove 303, the ram protrudes from the arc-shaped groove of the lower plywood 1; since the upper plywood 202 and the lower plywood 1 clamp the cable 5, there is friction between the cable 5 and the ram 301. When the cable 5 When sliding between the upper plywood 202 and the lower plywood 1, the friction between the cable 5 and the ram 301 drives the ram 301 to slide left or right in the support frame 302, and the guide rod 304 is guided by the V-shaped guide groove 303. Under the action, the ram 301 is driven to move upward at the same time, increasing the friction between the cable 5 and the ram 301, thereby preventing the cable 5 from sliding.

As shown in Figure 7, in this embodiment, a number of springs 305 are provided on both sides of the ram 301. The other end of the spring 305 is against the inner wall of the support frame 302. The springs 305 ensure that the ram 301 is in the initial state. The bottom is at the bottom of the V-shaped guide groove 303, thereby ensuring the anti-return effect of the first anti-return mechanism 3.

As shown in Figure 6, in this embodiment, a second adjustment screw 306 is movably connected to the lower part of the support frame 302, and the lower end of the second adjustment screw 306 extends through the first installation groove 101 to the lower part of the lower splint 1. And the second adjusting screw 306 is threadedly connected to the lower clamping plate 1. The second adjusting screw 306 is convenient for adjusting the height of the first anti-return mechanism 3, so that sufficient friction is formed between the ram 301 and the cable 5, thereby ensuring the first anti-return mechanism. 3. Anti-return effect, and suitable for use with cables 5 of different diameters.

As shown in Figure 3, in this embodiment, the first anti-return mechanism 3 is disposed in the middle of the opening of the upper clamping plate 202. When the cable 5 slides, the ram 301 of the first anti-return mechanism 3 moves upward, causing the cable to 5 forms a wavy structure between the upper plywood 202 and the ram 301, further ensuring the anti-reverse effect of the cable 5 and ensuring the stability of the suspension of the cable 5.

As shown in Figures 1 and 8, in this embodiment, extension plates 103 are provided at both ends of the lower clamping plate 1, and a second anti-return mechanism 4 is provided on the extension plate 103. The second anti-return mechanism 4 includes a first turntable 401 disposed on one side of the arc-shaped groove of the lower plywood 1 and a second turntable 405 disposed on the other side of the arc-shaped groove of the lower plywood 1. The cable 5 is disposed on the first turntable 401 and the second turntable 405. in between, and in the initial state, the side walls of the first turntable 401 and the second turntable 405 are in contact with the cable 5; the lower parts of the first turntable 401 and the second turntable 405 are both provided with eccentric shafts 403, and the eccentric shafts 403 Disposed on the side close to the cable 5, the lower end of the eccentric shaft 403 is rotationally connected to the extension plate 103; the cable 5 is provided with a hoop 404 that is clamped and connected to the cable 5, and both sides of the upper part of the hoop 404 are hinged There is a connecting rod 402, the other end of the connecting rod 402 is hinged with the first turntable 401 or the second turntable 405, and its hinge point is eccentrically arranged with the first turntable 401 or the second turntable 405; when the cable 5 slides in the suspension fitting, it is driven The hoop 404 moves to the left or right, and the hoop 404 drives the first turntable 401 and the second turntable 405 to rotate around the eccentric shaft 403 through the connecting rod 402. Since the eccentric shaft 403 is eccentrically arranged with the first turntable 401 and the second turntable 405, At this time, the first turntable 401 and the second turntable 405 form a cam structure. When the first turntable 401 and the second turntable 405 rotate eccentrically, the end of the first turntable 401 and the second turntable 405 close to the hinge point of the connecting rod 402 faces the cable 5 side. deflection, thereby clamping the cable 5, and realizing the secondary backstop of the suspension of the cable 5.

As shown in Figures 5 and 9, in this embodiment, the extension plate 103 is provided with a second installation groove 102, and a slider 406 is slidably connected in the second installation groove 102. The slider 406 The lower end of the eccentric shaft 403 is fixedly installed in the inner ring of the bearing 407. A third adjusting screw 408 is movably connected to one side of the slider 406. One end of the third adjusting screw 408 extends to the extension plate 103. and is threadedly connected to the extension plate 103; the slider 406 and the third adjustment screw 408 are used to adjust the distance between the first turntable 401 and the second turntable 405, and are suitable for use with cables 5 of different diameters.

As shown in Figure 1, in this embodiment, grooves are provided on the side walls of the first turntable 401 and the second turntable 405 to increase the contact between the first turntable 401 and the second turntable 405 and the cable 5 area, the first turntable 401 and the second turntable 405 are arranged in a staggered manner; when the cable 5 slides in the hanging fittings, the first turntable 401 and the second turntable 405 rotate in opposite directions, so that the cable 5 moves between the first turntable 401 and the second turntable 405. A wavy structure is formed between the second turntables 405, and the wavy structure formed by the cable 5 between the first turntable 401 and the second turntable 405 is perpendicular to the wavy structure formed by the cable 5 between the upper clamping plate 202 and the ram 301, so that The cable 5 forms a space check structure to prevent the cable 5 from sliding as much as possible.

As shown in Figure 8, in this embodiment, the connecting rod 402 includes a double-ended stud 4022 and a connecting sleeve 4021 threadedly connected to both ends of the double-ended stud 4022. The connecting sleeve 4021 at one end is hingedly connected to the hoop 404, and the other end is hinged to the hoop 404. The connecting sleeve 4021 at one end is hingedly connected to the first turntable 401 or the second turntable 405; the double-headed stud 4022 is convenient for adjusting the length of the connecting rod 402, and the angle between the connecting rods 402 on both sides is adjusted to the maximum to ensure the second stop. The sensitivity of reverse mechanism 4 when preventing reverse flow.

When using this hardware, first fix the hardware on the cable bridge 6 at the upper end of the pole through the fixing screw 104, then open the movable cover 2, place the cable 5 on the lower splint 1, and then cover the movable cover 2. Turn the first adjusting screw 203 to make the upper clamping plate 202 compress the cable 5. Since the upper clamping plate 202 has an inverted V-shaped structure, and the middle part of the upper clamping plate 202 is hinged with the connecting frame 201, when the cable 5 slides in the fitting, the cable 5 The friction force between the upper clamping plate 202 and the upper clamping plate 202 drives the upper clamping plate 202 to rotate, and one side of the upper clamping plate 202 presses the cable 5 downward to prevent the cable 5 from sliding. When the cable 5 slides in the hardware, the friction between the cable 5 and the ram 301 in the first anti-return mechanism 3 drives the ram 301 to slide left or right in the support frame 302, and the guide rod 304 moves in the V-shaped guide groove 303 Under the guidance of When 405 rotates eccentrically driven by the connecting rod 402, the ends of the first turntable 401 and the second turntable 405 close to the hinge point of the connecting rod 402 deflect toward the side of the cable 5, thereby clamping the cable 5 and realizing the suspension of the cable 5. The secondary backstop enhances the backstop effect of the cable 5 and ensures the stability of the connection between the cable 5 and the hanging hardware.

The above contents are only examples and descriptions of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or substitute them in similar ways, as long as they do not deviate from the structure of the invention. or beyond the scope defined by the claims, shall belong to the protection scope of the present invention.

Claims (6)

1. A cable suspension fitting for overhead transmission lines, including a lower plywood and a movable cover. The lower part of the lower plywood is provided with a number of fixed screws, and the fixed screws are fixedly installed on the cable bridge; the lower plywood is provided with An arc-shaped groove that accommodates cables. One end of the movable cover is hinged to the lower plywood, and the other end is removably connected to the lower plywood through bolts. The characteristic is that a connecting frame is provided inside the movable cover, and the connecting frame There are several upper splints on the inside. The upper splints have a V-shaped structure, and the upper ends of the upper splints are hinged with the connecting frame. The opening of the upper plying plate is provided with an arc-shaped groove for accommodating cables. The upper part of the connecting frame is movable. A first adjusting screw is connected, and the upper end of the first adjusting screw penetrates the movable cover and is threadedly connected to the movable cover; the lower clamping plate is provided with a plurality of first installation slots, and the first installation slot is provided with a first check Mechanism, the first anti-return mechanism includes a support frame and a ram arranged inside the support frame. V-shaped guide grooves are provided on both sides of the support frame. The upper part of the ram is provided with an arc-shaped arc with the lower splint. The grooves match the arc-shaped grooves, and guide rods are provided at both ends of the ram. The guide rods are slidably arranged inside the V-shaped guide groove, and in the initial state, the guide rod is located at the bottom of the V-shaped guide groove. When the ram protrudes from the arc-shaped groove of the lower plywood; the first anti-return mechanism is arranged in the middle of the opening of the upper plywood. When the cable slides, the ram of the first anti-return mechanism moves upward, allowing the cable to pass between the upper plywood and the upper plywood. A corrugated structure is formed between the rams; extension plates are provided at both ends of the lower plywood, and a second anti-return mechanism is provided on the extension plate. The second anti-return mechanism includes an arc-shaped groove provided on one side of the lower plywood. The first turntable and the second turntable provided on the other side of the arc-shaped groove of the lower splint, the cable is provided between the first turntable and the second turntable, and in the initial state, the side walls of the first turntable and the second turntable are both In contact with the cable; the lower parts of the first turntable and the second turntable are equipped with eccentric shafts, and the eccentric shaft is arranged on the side close to the cable, and the lower end of the eccentric shaft is rotationally connected to the extension plate; the cable is provided with an A hoop connected by cable clamping. The upper part of the hoop is hinged with connecting rods on both sides. The other end of the connecting rod is hinged with the first turntable or the second turntable, and its hinge point is eccentrically arranged with the first turntable or the second turntable. ; The extension plate is provided with a second installation groove, a slide block is slidably connected in the second installation groove, a bearing is provided on the slide block, and the lower end of the eccentric shaft is fixedly installed in the inner ring of the bearing, so A third adjusting screw is movably connected to one side of the slider, and one end of the third adjusting screw extends to the outside of the extension plate and is threadedly connected to the extension plate. 2. A cable suspension fitting for overhead transmission lines according to claim 1, characterized in that, both ends of the arc-shaped groove of the lower plywood and the arc-shaped groove of the upper plywood are provided with rounded corners. , the upper part of the arc-shaped groove of the lower plywood and the lower part of the arc-shaped groove of the upper plywood are equipped with anti-slip rubber pads. 3. A cable suspension fitting for overhead transmission lines according to claim 1, characterized in that a plurality of springs are provided on both sides of the ram, and the other end of the spring is against the inner wall of the support frame. 4. A cable suspension fitting for overhead transmission lines according to claim 1, characterized in that a second adjustment screw is movably connected to the lower part of the support frame, and the lower end of the second adjustment screw passes through the first installation The groove extends to the lower part of the lower clamping plate, and the second adjusting screw is threadedly connected to the lower clamping plate. 5. A cable suspension fitting for overhead power transmission lines according to claim 1, characterized in that grooves are provided on the side walls of the first turntable and the second turntable, and the first turntable and the second turntable are The second turntables are arranged in a staggered manner; when the cable slides in the hanging fittings, the first turntable and the second turntable rotate in opposite directions, causing the cable to form a wavy structure between the first turntable and the second turntable, and the cables move between the first turntable and the second turntable. The wavy structure formed between the second turntable and the wavy structure formed between the upper plywood and the ram of the cable are perpendicular to each other, so that the cable forms a space check structure. 6. A kind of cable suspension fitting for overhead transmission lines according to claim 1, characterized in that the connecting rod includes a double-ended stud and a connecting sleeve threadedly connected to both ends of the double-ended stud, and the connection at one end The sleeve is hinged with the hoop, and the connecting sleeve at the other end is hinged with the first turntable or the second turntable.