Pulley structure for installing overhead transmission line spacer rods

Abstract

The present invention discloses a pulley structure for installing spacer bars of overhead power transmission lines, and mainly relates to the field of construction of spacer bars. The pulley frame comprises a pulley frame, on which a pulley is rotatably connected and in rolling contact with the power transmission line, a through hole is provided on one side of the pulley frame for the power transmission line to pass through, and after the power transmission line passes through the through hole, the top of the power transmission line contacts the bottom of the pulley, a pressing plate is vertically slidably connected on the pulley frame, a compression spring is provided between the pressing plate and the pulley frame, a brake block is provided at the bottom of the pressing plate, and the brake block contacts the bottom of the power transmission line, and a convex block is also provided on the side of the pulley, and a friction block is provided on the brake block, and the friction block contacts the convex block while the brake block contacts the bottom of the power transmission line. The beneficial effect of the present invention is that it can keep the position of the pulley fixed when the spacer bar is installed, and the cooperation between the spacer bar and the pulley is more firm, thereby improving the safety of the installation and construction of the spacer bar at a high place.

Description

Technical Field

[0001] The invention relates to the field of spacer bar installation, in particular to a pulley structure for installing spacer bars of overhead power transmission lines. Background Art

[0002] Spacers are used to prevent contact or entanglement between overhead lines, thereby improving the safety of overhead line power transmission. However, given that overhead lines are located at high altitudes, their installation is quite difficult. The existing installation method generally utilizes a pulley to move on the line, with the spacers hung on the pulley, and the spacers are carried to the installation position by the movement of the pulley. However, when encountering an installation position with a large terrain difference, the existing pulley structure is prone to slide on the transmission line in the direction of the difference. At this time, the operator needs to install the spacer, but it is difficult to effectively fix the pulley, resulting in the pulley carrying the spacer having a tendency to slide downward, affecting the safety of high-altitude construction. Moreover, the spacer is generally hung directly on the pulley, and the spacer may easily fall due to the shaking of the pulley during the movement of the pulley, affecting the safety below the transmission line, so that the overall safety of the construction needs to be further improved. Summary of the invention

[0003] The purpose of the present invention is to provide a pulley structure for installing overhead transmission line spacer bars, which can keep the pulley position fixed when the spacer bars are installed, and the fit between the spacer bars and the pulley is more firm, thereby improving the safety of high-place installation construction of the spacer bars.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A pulley structure for installing an overhead power transmission line spacer comprises a pulley frame, a pulley in rolling contact with the power transmission line is rotatably connected to the pulley frame, a through hole is provided on one side of the pulley frame for the power transmission line to pass through, the top of the power transmission line contacts the bottom of the pulley after passing through the through hole, a pressing plate is vertically slidably connected to the pulley frame, a compression spring is provided between the pressing plate and the pulley frame, a brake block is provided at the bottom of the pressing plate, the brake block contacts the bottom of the power transmission line, a convex block is provided on the side of the pulley, and the brake A friction block is provided on the block, and the brake block contacts the bottom of the transmission line while the friction block contacts the protrusion. A hanging rack is provided at the bottom of the pulley frame, and an inclined hanging rod is rotatably connected to the hanging rack. The inclined bottom end of the hanging rod is rotatably connected to the hanging rack, and the inclined bottom end of the hanging rod is located below the pulley frame. A tension spring is provided between the inclined top end of the hanging rod and the hanging rack, and a plurality of spacer rods are hung on the hanging rod. A hanging opening for the spacer rods to pass through is provided on the hanging rack near the inclined top end of the hanging rod.

[0006] Furthermore, an arc-shaped groove is provided on the surface of the pulley, and the top of the power transmission line contacts the arc-shaped groove. The top of the brake block is provided with an arc-shaped brake groove, and the bottom of the power transmission line contacts the arc-shaped brake groove.

[0007] Furthermore, the opposite sides of the protrusion and the friction block are both provided with friction inclined surfaces, and the friction inclined surfaces of the two are in contact with each other.

[0008] Furthermore, the pulley frame is in the shape of a U-shape, the pulley is rotatably connected to the inside of the U-shape, the through hole passes through the side of the U-shape, the pressing plate is located at the top of the pulley frame, and a plurality of sliding rods are provided at the bottom of the pressing plate, the sliding rods pass through the top of the pulley frame and are slidably connected thereto, and the brake block is located inside the U-shape and connected to the bottom of the sliding rod.

[0009] Furthermore, the compression spring is located between the bottom of the pressing plate and the top of the pulley frame, and the compression spring is sleeved on the outside of the slide rod.

[0010] Furthermore, the bottom of the slide bar on the side away from the through hole is connected to the brake block, and a through hole for the transmission line to pass through is provided between the bottom of the slide bar on the side close to the through hole and the brake block.

[0011] Furthermore, a baffle is rotatably connected to the top of the through hole, a torsion spring is provided between the baffle and the pulley frame, and the longitudinal length of the baffle is greater than the height of the through hole.

[0012] Furthermore, a sliding hole is provided on one side of the hanging rack, and the inclined top end of the hanging rod passes through the sliding hole and moves up and down therein, and a pedal is provided at the inclined top end of the hanging rod.

[0013] Furthermore, a moving contact is vertically slidably connected in the arc-shaped slot, a reset spring is provided between the moving contact and the pulley, a counter is provided on the pressing plate, a static contact electrically connected to the counter is provided on the pulley, and the moving contact is squeezed by the power transmission line and contacts the static contact.

[0014] Furthermore, the pulley is provided with a slide groove connected to the arc-shaped slot, the static contact is located at the bottom of the slide groove, the moving contact is slidably connected in the slide groove, and the two sides of the slide groove are symmetrically provided with connected limit grooves, and the side surfaces of the moving contact are symmetrically provided with limit blocks, the limit blocks are slidably connected in the limit grooves, and the reset spring is located between the bottom of the limit block and the bottom of the limit groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The present invention sets a pressing plate on the pulley frame along the vertical sliding direction. Under the action of the compression spring, the pressing plate makes the brake block at the bottom contact with the bottom of the power transmission line, clamps the power transmission line between the pulley and the brake block, and realizes the relative fixation of the pulley frame relative to the power transmission line without the action of external force. Therefore, when encountering an installation position with a large drop, the pulley frame can automatically maintain the specified position of the power transmission line, and the operator does not need to be distracted to fix it, thereby ensuring the safety of the construction operation. When the pulley frame needs to be moved, it only needs to press the pressing plate to make the brake block separate from the power transmission line to push the pulley frame to move. The structure is simple, making the movement or fixation of the pulley frame more convenient and stable.

[0017] 2. A friction block is also arranged on the brake block, and a convex block is arranged on the side of the pulley. When the brake block contacts the bottom of the power transmission line, the friction block contacts the convex block. In this way, the power transmission line is not only clamped by the brake block, but also the rotation of the pulley is stopped by the contact between the friction block and the convex block, which further improves the fixing effect of the pulley frame, making the pulley frame more stable relative to the power transmission line, avoiding uncontrolled sliding along the power transmission line with a large drop, ensuring the accuracy of the position of the spacer bar thereon, and facilitating the operation of taking the spacer bar;

[0018] 3. A hanging rack is arranged at the bottom of the pulley frame, and an inclined hanging rod is rotatably arranged on the hanging rack. The inclined bottom end of the hanging rod is located below the pulley frame and is rotatably connected to the hanging rack. A tension spring is arranged between the inclined top end of the hanging rod and the hanging rack. Such an arrangement makes the hanging rod in an inclined state under normal conditions, and the spacer rods hung thereon are located near the bottom end of the hanging rod under the action of gravity, that is, located below the pulley frame, so that the overall force of the pulley frame is more stable, and the position relative to the transmission line is more stable, and at the same time, the spacer rods are The hanging opening is located away from the top end of the hanging rod, so that the spacer bar is not easy to slip out of the hanging opening, so that it is more firmly hung on the hanging rod, effectively preventing the spacer bar from falling. When taking it out, you only need to rotate the top of the hanging rod to tilt the hanging rod downward toward the hanging opening, so that the spacer bar slides toward the hanging opening, and you can easily take out the spacer bar, making the hanging of the spacer bar safer, and taking it out more efficient and convenient, improving the stability of the spacer bar moving process, and making the overall installation and construction of the spacer bar safer and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Attached Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Attached Figure 2 It is a right side view of the present invention.

[0021] Attached Figure 3 This invention is attached Figure 2 Cross-sectional view along the AA direction.

[0022] Attached Figure 4 This invention is attached Figure 3 Cross-sectional view along the BB direction.

[0023] Attached Figure 5 This invention is attached Figure 3 A partial enlarged view of area C in the middle.

[0024] Numbers shown in the accompanying drawings:

[0025] 1. Pulley frame; 2. Transmission line; 3. Pulley; 4. Through hole; 5. Press plate; 6. Compression spring; 7. Brake block; 8. Bump; 9. Friction block; 10. Hanging frame; 11. Hanging rod; 12. Tension spring; 13. Spacer; 14. Hanging opening; 15. Arc-shaped slot; 16. Arc-shaped brake slot; 17. Friction slope; 18. Slide bar; 19. Through opening; 20. Baffle; 21. Torsion spring; 22. Slide hole; 23. Pedal; 24. Moving contact; 25. Reset spring; 26. Counter; 27. Static contact; 28. Slide groove; 29. ​​Limiting groove; 30. Limiting block. DETAILED DESCRIPTION

[0026] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the application equally.

[0027] The present invention discloses a pulley structure for installing spacer bars of an overhead power transmission line. The main structure includes a pulley frame 1, which is used to move along the power transmission line and carry the spacer bars. The pulley frame 1 is rotatably connected to a pulley 3 that is in rolling contact with the power transmission line 2. Specifically, a rotating shaft is rotatably arranged on the pulley frame 1, and the pulley 3 is fixed on the rotating shaft to realize rotation relative to the pulley frame 1. A through hole 4 is provided on one side of the pulley frame 1 for the power transmission line 2 to pass through. When the pulley frame 1 is matched with the power transmission line, it is only necessary to align the through hole 4 of the pulley frame 1 with the power transmission line, so that the power transmission line can pass through the through hole 4 and enter the interior of the pulley frame 1 and contact the bottom of the pulley 3, thereby realizing rolling movement of the pulley 3 on the power transmission line 2. After the line 2 passes through the through hole 4, its top contacts the bottom of the pulley 3. A pressing plate 5 is vertically slidably connected to the upper edge of the pulley frame 1. The pressing plate 5 is located at the top of the pulley frame 1, which is convenient for the operator to press with his hand. A compression spring 6 is provided between the pressing plate 5 and the pulley frame 1. Under the action of the compression spring 6, the pressing plate 5 is in a high position. When pressed downward, the compression spring 6 is compressed. A brake block 7 is provided at the bottom of the pressing plate 5. The brake block 7 contacts the bottom of the transmission line 2. When the pressing plate 5 is in a high position, the brake block 7 contacts the bottom of the transmission line 2, so that the transmission line 2 is clamped between the pulley 3 and the brake block 7, and the braking effect of the pulley frame 1 relative to the transmission line 2 is achieved, so that the interval When the spacer is installed, the pulley frame 1 remains in a relatively fixed state relative to the transmission line 2, especially when the spacer is installed at the position of the transmission line 2 with a large drop, the pulley frame 1 can automatically maintain the stability of the position, without the need for additional maintenance operations by the operator, and the installation of the spacer can be more convenient, thereby improving the convenience of construction; a protrusion 8 is also welded or bolted on the side of the pulley 3, and a friction block 9 is provided on the top of the brake block 7. The brake block 7 contacts the bottom of the transmission line 2 while the friction block 9 contacts the protrusion 8. Rubber pad components with large friction are arranged at the two contact positions to increase the friction at the contact position and ensure the braking effect of the pulley frame 1. Such an arrangement between the brake block 7 and the transmission line The contact between the line 2 realizes that the position of the pulley frame 1 relative to the transmission line 2 is relatively stable, and the contact between the friction block 9 and the protrusion 8 is used to lock the rotation of the pulley 3, thereby preventing the rotation of the pulley 3, so that the transmission line 2 is more firmly clamped between the pulley 3 and the brake block 7, and the stability of the relative position of the pulley frame 1 relative to the transmission line 2 is further improved. When the pulley frame 1 needs to be moved, it is only necessary to press the pressing plate 5 downward to separate the brake block 7 from the transmission line 2 and the friction block 9 from the protrusion 8, so that the pulley 3 can slide freely on the transmission line 2, making the movement and fixation of the pulley frame 1 very convenient, and improving the stability of the pulley frame 1 when the spacer is installed and the convenience of moving the pulley frame 1;

[0028] A hanging frame 10 is welded or bolted to the bottom of the pulley frame 1, and an inclined hanging rod 11 is rotatably connected to the hanging frame 10 via a pin shaft or a hinge. The inclined bottom end of the hanging rod 11 is rotatably connected to the hanging frame 10 via a pin shaft or a hinge. The inclined bottom end of the hanging rod 11 is located below the pulley frame 1, and a tension spring 12 is provided between the inclined top end of the hanging rod 11 and the hanging frame 10. A plurality of spacer bars 13 are hung on the hanging rod 11, and a hanging opening 14 for the spacer bars 13 to pass through is provided at a position of the hanging frame 10 near the inclined top end of the hanging rod 11, and the hanging frame 10 maintains an inclined state under the action of the tension spring 12, and the spacer bars 13 hung thereon are concentrated on the hanging rod 11 near the bottom end under the action of gravity, that is, located below the pulley frame 1, so that the overall center of the pulley frame 1 is close to the lower position of the transmission line 2, and its position relative to the transmission line 2 It is more stable and not easy to tilt, ensuring stability when fixing and moving. At the same time, the spacer bars 13 are located away from the hanging opening 14, so that the spacer bars 13 are not easy to slip off from the hanging opening 14 when fixing and moving, making the structure of the hung spacer bars 13 more stable, avoiding the safety threat caused by the falling of the spacer bars 13 to the bottom of the transmission line 2, and improving the safety of construction operations. When taking the spacer bars 13, you only need to rotate the top of the hanging rod 11 so that it becomes an inclined bottom after rotation, so that the spacer bars 13 on it slide toward the position of the hanging opening 14, so that the spacer bars 13 are conveniently taken out from the hanging opening 14. After the hanging rod 11 is released after taking it, the hanging rod 11 automatically resets under the action of the tension spring 12, so that the spacer bars 13 move to a position away from the hanging opening 14 and maintain a stable hanging state, making it more convenient to take the spacer bars 13, and improving the convenience of construction taking.

[0029] Preferably, the surface of the pulley 3 is provided with an arc-shaped groove 15, and the arc-shaped groove 15 is formed by the surface of the pulley 3 being recessed inward, so that the pulley 3 fits better with the arc-shaped surface of the transmission line 2, thereby making the movement of the pulley frame 1 on the transmission line 2 more stable and not easy to tilt or slip, and the top of the transmission line 2 contacts with the arc-shaped groove 15, and the top of the brake block 7 is provided with an arc-shaped brake groove 16, and the bottom of the transmission line 2 contacts with the arc-shaped brake groove 16. When the brake block 7 contacts with the transmission line 2, the arc-shaped brake groove 16 contacts with the arc-shaped surface of the transmission line 2, thereby increasing the contact area, increasing the friction force, and achieving a better braking effect on the pulley frame 1, so that the pulley frame 1 is more stable when fixed relative to the transmission line.

[0030] Preferably, the opposing sides of the protrusion 8 and the friction block 9 are provided with friction slopes 17, and the friction slopes 17 of the two are in contact with each other. Such a configuration enables the contact area to be larger and the contact friction force to be greater when the brake block 7 drives the friction block 9 to move upward and contact the protrusion 8. At the same time, the contact mode of the slope has a better fitting effect, is not easy to be relatively misaligned, and can maintain a more stable contact effect, thereby improving the locking effect of the rotation of the pulley 3.

[0031] Preferably, the pulley frame 1 is in the shape of a Chinese character "U". The pulley 3 is rotatably connected to the inside of the Chinese character "U". The through hole 4 passes through the side of the Chinese character "U". The pressing plate 5 is located at the top of the pulley frame 1. A plurality of sliding rods 18 are welded or bolted to the bottom of the pressing plate 5. Specifically, there are four sliding rods 18, which are distributed at the four corners of the pressing plate 5. The sliding rod 18 passes through the top of the pulley frame 1 and is slidably connected thereto. The brake block 7 is located inside the Chinese character "U" and is connected to the bottom of the sliding rod 18. Such an arrangement enables multiple sliding rods 18 to pass through the top of the pulley frame 1 and slide relatively when the pressing plate 5 slides up and down relative to the pulley frame 1, making the structure of the pressing plate 5 more stable when it moves up and down relative to the pulley frame 1. When the operator presses the pressing plate 5 by hand, the overall force on the pulley frame 1 is more evenly distributed, and it is not easy for the pulley frame 1 to tip over or slip due to the pressing, thereby improving the stability of the pulley frame 1 relative to the transmission line 2.

[0032] Preferably, the compression spring 6 is located between the bottom of the pressing plate 5 and the top of the pulley frame 1, and the compression spring 6 is sleeved on the outside of the slide rod 18. Under the action of the compression spring 6, the pressing plate 5 can be more stably located at a high position above the pulley frame 1, ensuring the contact effect between the brake block 7 and the transmission line 2. When pressed, the compression spring 6 at each position can be stably compressed, so that its reset is more timely and accurate.

[0033] Preferably, the bottom of the slide rod 18 on the side away from the through hole 4 is connected to the brake block 7, and a through hole 19 for the transmission line 2 to pass through is provided between the bottom of the slide rod 18 on the side close to the through hole 4 and the brake block 7. Such an arrangement ensures that the arrangement of multiple slide rods 18 will not affect the coordination between the transmission line 2 and the pulley frame 1. When the transmission line 2 enters the interior of the pulley frame 1 from the through hole 4, it can simultaneously pass through the through hole 19 and enter the position between the brake block 7 and the pulley 3, making the structural arrangement more reasonable. At the same time, it does not affect the arrangement of multiple compression springs 6, making its structural arrangement more reasonable, ensuring the braking effect of the pulley frame 1 without interfering with the coordination between the pulley frame 1 and the transmission line 2.

[0034] Preferably, a baffle 20 is rotatably connected to the top of the through hole 4 via a pin or a hinge, a torsion spring 21 is provided between the baffle 20 and the pulley frame 1, and the longitudinal length of the baffle 20 is greater than the height of the through hole 4. The baffle 20 can be used to close the through hole 4, and it is always located inside the pulley frame 1. When the transmission line 2 enters the interior of the pulley frame 1, the baffle 20 is rotated inward to open the through hole 4. After entering, the baffle 20 automatically resets under the action of the torsion spring 21 to close the through hole 4, so that the transmission line 2 is not easily separated from the pulley frame 1 after passing through the through hole 4, thereby further improving the stability of the pulley frame 1 relative to the transmission line 2.

[0035] Preferably, a sliding hole 22 is provided on one side of the hanging bracket 10, and the inclined top end of the hanging rod 11 passes through the sliding hole 22 and moves up and down therein. A pedal 23 is provided at the inclined top end of the hanging rod 11. Such an arrangement allows the hanging rod 11 to slide up and down in the sliding hole 22 by stepping on the pedal 23 when the hanging rod 11 is rotated, thereby realizing position control of the spacer rod 13 hung thereon, making operation more convenient and the rotation of the hanging rod 11 smoother.

[0036] Preferably, a moving contact 24 is vertically slidably connected in the arc-shaped slot 15, and a reset spring 25 is provided between the moving contact 24 and the pulley 3. When the pulley 3 rolls and contacts the power transmission line 2, the moving contact 24 is squeezed by the power transmission line 2, that is, the moving contact 24 is squeezed once for each rotation. A counter 26 is provided on the pressing plate 5, and the counter 26 can use any structure with a counting function in the prior art, and a display screen is connected thereto to facilitate the display of the number of rotations, that is, the distance moved by the pulley frame 1. A static contact 27 electrically connected to the counter 26 is provided on the pulley 3, and the moving contact 24 contacts with the static contact 27 after being squeezed by the power transmission line 2. A count is generated once the moving contact 24 contacts the static contact 27 once, and the specific principle can be that a pulse is generated when the circuit is connected, that is, a count is generated once, or other counting principles are all possible, so that the installation distance of the two spacer bars 13 can be better controlled, and there is no need to use a hundred-meter ruler in the prior art for measurement and control, which further improves the convenience of installation and construction of the spacer bars 13.

[0037] Preferably, the pulley 3 is provided with a slide groove 28 connected to the arc-shaped slot 15, the static contact 27 is located at the bottom of the slide groove 28, the moving contact 24 is slidably connected in the slide groove 28, the slide groove 28 runs through the surface of the arc-shaped slot 15, and the two sides of the slide groove 28 are symmetrically provided with connected limit grooves 29, and the side surfaces of the moving contact 24 are symmetrically provided with limit blocks 30, and the limit blocks 30 are slidably connected in the limit groove 29, and the reset spring 25 is located between the bottom of the limit block 30 and the bottom of the limit groove 29. When the moving contact 24 is squeezed, it slides downward to compress the reset spring 25, so that the moving contact 24 is reset in time after contacting and counting once with the static contact 27, thereby facilitating preparation for the next count and making the counting result more accurate.

[0038] Working principle: In the present invention, a pressing plate 5 is arranged on the pulley frame 1 along the vertical sliding direction. Under the action of the compression spring 6, the pressing plate 5 makes the brake block 7 at the bottom contact with the bottom of the transmission line 2, and clamps the transmission line 2 between the pulley 3 and the brake block 7, so that the position of the pulley frame 1 relative to the transmission line 2 is relatively fixed without the action of external force. Therefore, when encountering an installation position with a large drop, the pulley frame 1 can automatically maintain the specified position of the transmission line 2, and the operator does not need to be distracted to fix it, thereby ensuring the safety of the construction operation. When the pulley frame 1 needs to be moved, it is only necessary to press the pressing plate 5 to make the brake block 7 separate from the transmission line 2 to push the pulley. The frame 1 is movable and has a simple structure, which makes the movement or fixation of the pulley frame 1 more convenient and stable; a friction block 9 is also arranged on the brake block 7, and a protrusion 8 is arranged on the side of the pulley 3. When the brake block 7 contacts the bottom of the transmission line 2, the friction block 9 contacts the protrusion 8. In this way, not only the brake block 7 is used to clamp the transmission line 2, but also the contact between the friction block 9 and the protrusion 8 is used to stop the rotation of the pulley 3, which further improves the fixing effect of the pulley frame 1, makes the pulley frame 1 more stable relative to the transmission line 2, avoids its uncontrolled sliding along the transmission line 2 with a large drop, and ensures the accuracy of the position of the spacer 13 thereon. , which is convenient for taking out the spacer rod 13; a hanging rack 10 is arranged at the bottom of the pulley frame 1, and an inclined hanging rod 11 is rotatably arranged on the hanging rack 10, and the inclined bottom end of the hanging rod 11 is located below the pulley frame 1 and is rotatably connected to the hanging rack 10, and a tension spring 12 is arranged between the inclined top end of the hanging rod 11 and the hanging rack 10. Such an arrangement makes the hanging rod 11 in an inclined state under normal conditions, and the spacer rod 13 hung thereon is located near the bottom end of the hanging rod 11 under the action of gravity, that is, located below the pulley frame 1, so that the overall force of the pulley frame 1 is more stable, and the position relative to the transmission line 2 is more stable, and at the same time The spacer bars 13 are all located at the hanging opening 14 far away from the top end of the hanging rod 11, so that the spacer bars 13 are not easy to slip off from the hanging opening 14, so that they are more firmly hung on the hanging rod 11, effectively preventing the spacer bars 13 from falling. When taking them out, you only need to rotate the top of the hanging rod 11 to tilt the hanging rod 11 downward toward the hanging opening 14, so that the spacer bars 13 slide toward the hanging opening 14, and you can easily take out the spacer bars 13, making the hanging of the spacer bars 13 safer, and taking them out more efficiently and conveniently, thereby improving the stability of the moving process of the spacer bars 13 and making the overall installation and construction of the spacer bars 13 safer and more convenient.

Claims

1. A pulley structure for installing a spacer rod of an overhead power transmission line, comprising a pulley frame (1), a pulley (3) rotatably connected to the pulley frame (1) and in rolling contact with a power transmission line (2), characterized in that: One side of the trolley frame (1) is provided with a through hole (4) for the transmission line (2) to pass through. After the transmission line (2) passes through the through hole (4), the top of the transmission line (2) contacts the bottom of the pulley (3). A pressing plate (5) is slidably connected to the trolley frame (1) vertically. A compression spring (6) is arranged between the pressing plate (5) and the trolley frame (1). A brake block (7) is arranged at the bottom of the pressing plate (5). The brake block (7) contacts the bottom of the transmission line (2). A convex block (8) is further arranged on the side surface of the pulley (3). A friction block (9) is arranged on the brake block (7). When the brake block (7) contacts the bottom of the transmission line (2), the friction block (9) contacts the convex block (8). A hanging rack (10) is arranged at the bottom of the trolley frame (1). An inclined hanging rod (11) is rotatably connected to the hanging rack (10). The inclined bottom end of the hanging rod (11) is rotatably connected to the hanging rack (10). The inclined bottom end of the hanging rod (11) is located below the trolley frame (1). A tension spring (12) is arranged between the inclined top end of the hanging rod (11) and the hanging rack (10). A plurality of spacer dampers (13) are hung on the hanging rod (11). A hanging port (14) for the spacer damper (13) to pass through is arranged at a position of the hanging rack (10) close to the inclined top end of the hanging rod (11). A sliding hole (22) is arranged on one side of the hanging rack (10). The inclined top end of the hanging rod (11) passes through the sliding hole (22) and moves up and down therein. A pedal (23) is arranged at the inclined top end of the hanging rod (11).

2. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 1, characterized in that: An arc-shaped card slot (15) is arranged on the surface of the pulley (3). The top of the transmission line (2) contacts the arc-shaped card slot (15). An arc-shaped brake slot (16) is arranged at the top of the brake block (7). The bottom of the transmission line (2) contacts the arc-shaped brake slot (16).

3. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 1, characterized in that: Friction inclined surfaces (17) are arranged on the opposite side surfaces of the convex block (8) and the friction block (9), and the two friction inclined surfaces (17) are in contact with each other.

4. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 1, characterized in that: The trolley frame (1) is in a square shape with a hole in the middle. The pulley (3) is rotatably connected inside the square shape. The through hole (4) penetrates through the side surface of the square shape. The pressing plate (5) is located at the top of the trolley frame (1). A plurality of sliding rods (18) are arranged at the bottom of the pressing plate (5). The sliding rods (18) penetrate through the top of the trolley frame (1) and are slidably connected thereto. The brake block (7) is located inside the square shape and is connected to the bottom of the sliding rods (18).

5. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 4, characterized in that: The compression spring (6) is located between the bottom of the pressing plate (5) and the top of the trolley frame (1), and the compression spring (6) is sleeved outside the sliding rods (18).

6. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 5, characterized in that: The bottom of the sliding rod (18) on the side away from the through hole (4) is connected to the brake block (7). A through port (19) for the transmission line (2) to pass through is arranged between the bottom of the sliding rod (18) on the side close to the through hole (4) and the brake block (7).

7. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 1, characterized in that: A baffle (20) is rotatably connected to the top of the through hole (4), a torsion spring (21) is provided between the baffle (20) and the pulley frame (1), and the longitudinal length of the baffle (20) is greater than the height of the through hole (4).

8. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 2, characterized in that: A moving contact (24) is vertically slidably connected in the arc-shaped slot (15); a return spring (25) is provided between the moving contact (24) and the pulley (3); a counter (26) is provided on the pressing plate (5); a stationary contact (27) electrically connected to the counter (26) is provided on the pulley (3); and the moving contact (24) is pressed by the power transmission line (2) to contact the stationary contact (27).

9. The pulley structure for installing the spacer rod of the overhead power transmission line according to claim 8, characterized in that: The pulley (3) is provided with a slide groove (28) connected to the arc-shaped slot (15); the static contact (27) is located at the bottom of the slide groove (28); the moving contact (24) is slidably connected in the slide groove (28); both sides of the slide groove (28) are symmetrically provided with connected limit grooves (29); the side surfaces of the moving contact (24) are symmetrically provided with limit blocks (30); the limit blocks (30) are slidably connected in the limit groove (29); and the return spring (25) is located between the bottom of the limit block (30) and the bottom of the limit groove (29).

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