A power transmission line engineering stringing construction pulley

Abstract

The application discloses a power transmission line engineering stringing construction pulley, and belongs to the technical field of stringing construction equipment, which comprises a frame and a pulley, the frame comprises a vertical plate, a horizontal plate is installed on the upper portion of the vertical plate, a horizontal shaft is fixedly installed on the lower portion of the vertical plate, the pulley is rotatably installed on the horizontal shaft, a shell is rotatably installed on the end of the horizontal shaft away from the vertical plate, the shell is composed of two rectangular bodies which are connected with each other, the width of the upper rectangular body is smaller than that of the lower rectangular body, the horizontal shaft penetrates through the lower portion of the shell, a limiting plate is installed on the side of the middle portion of the shell close to the horizontal plate, the limiting plate is located below the horizontal plate and is detachably connected with the horizontal plate through a pin, and a locking mechanism matched with the horizontal shaft is further arranged in the shell. The application solves the technical problems that the existing cable pulley has no additional locking structure and the pin is prone to falling off accidentally to cause safety accidents, realizes multiple locking protection of the pulley, and improves the use safety and stability of the equipment under complex outdoor construction conditions.

Description

Technical Field

[0001] This invention belongs to the technical field of overhead line construction equipment, and specifically relates to a pulley for overhead line construction in power transmission line engineering. Background Technology

[0002] Cable laying pulleys are a common tool in power transmission line construction. They are used to conveniently and safely lay and pull power conductors during installation. Their main function is to reduce friction and tension on the conductors during the laying process through a pulley structure, protecting the conductor surface from wear. This also reduces the labor intensity of construction workers and improves construction efficiency. When using pulleys for support during power transmission line installation, the appropriate pulley with corresponding pulleys must be selected based on the number of cables being pulled. The pulleys prevent friction damage to the power cables during construction. Current cable pulleys typically consist of a frame and pulleys. The frame allows the pulleys to be fixed in suitable positions, providing a good cable laying effect. After the cable pulley has pulled the power cables, workers need to separate the pulled power cables from the cable pulley.

[0003] The existing cable trolley frame beams are mostly designed as movable structures. One end of the beam is hinged to the frame, and the other end is detachably connected to the frame via a pin. After the cable is pulled, the workers remove the pin, which pushes the beam to rotate around the hinge axis to create a gap, thus separating the trolley from the power cable. However, this type of trolley relies solely on the pin to fix the beam and does not have an additional locking and protective structure, resulting in poor equipment safety. In the complex outdoor working conditions of power transmission line construction, the pin is prone to accidentally falling off due to equipment bumps, vibrations, or external collisions, which can lead to the beam loosening, causing cable detachment, trolley falls, and other safety accidents, posing a great threat to construction safety and equipment property. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a cable trolley for overhead line construction in power transmission line engineering. This invention solves the technical problems of existing cable trolleys lacking additional locking structures and having pins that are prone to accidental falling off, causing safety accidents. It achieves multiple locking protections for the trolley and improves the safety and stability of the equipment under complex outdoor construction conditions.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A trolley for overhead line construction in power transmission line engineering includes a frame and pulleys. The frame includes a vertical plate, a horizontal plate is installed on the upper part of the vertical plate, and a horizontal shaft is fixedly installed on the lower part of the vertical plate. The pulleys are rotatably mounted on the horizontal shaft. A housing is rotatably mounted on the end of the horizontal shaft away from the vertical plate. The housing is composed of two connected rectangular bodies, the width of the upper rectangle being smaller than the width of the lower rectangle. The horizontal shaft passes through the lower part of the housing. A limiting plate is installed on the middle part of the housing near the horizontal plate. The limiting plate is located below the horizontal plate and is detachably connected to the horizontal plate by a pin. A locking mechanism that cooperates with the horizontal shaft is also provided inside the housing. An additional safety mechanism that cooperates with the locking mechanism is provided on the side wall of the housing away from the pulleys.

[0006] The locking mechanism includes a first disc and a second disc, both mounted on a horizontal axis. The first disc is fixedly mounted on the horizontal axis, and a plurality of locking holes are evenly distributed on the side wall near the second disc. The second disc is movably mounted on the horizontal axis and can slide left and right along the horizontal axis. A plurality of locking rods that mate with the locking holes are evenly distributed on the side wall of the second disc near the first disc. The locking rods can be inserted into the locking holes on the first disc. Guide rods are fixedly mounted at the upper and lower ends of the side wall of the second disc away from the locking rods. The guide rods pass through the housing and are slidably connected to the housing. The housing has through holes that mate with the guide rods. A spring is sleeved between the side wall of the second disc and the inner wall of the housing, and on the horizontal axis.

[0007] A drive plate is installed on the top of the second disc body. A drive rod that can slide up and down is movably installed inside the housing. A slanted groove that cooperates with the drive rod is opened on the drive plate. The top end of the drive rod passes through the housing and extends to the outside of the housing. The bottom end of the drive rod is installed in the slanted groove on the drive plate.

[0008] Preferably, a guide block that can slide up and down is movably installed inside the housing, the guide block is fixedly connected to the drive rod, and a drive pull ring is installed on the top of the drive rod.

[0009] The additional safety mechanism includes an extension cylinder and a cap. The extension cylinder is located around the two guide rods and is installed on the side wall of the housing. The cap is threaded onto the end of the extension cylinder. A limiting ring that mates with the guide rod on the second disc is installed inside the cap. A first indicator strip and a second indicator strip are also provided on the outer wall of the extension cylinder.

[0010] Preferably, an emergency pull ring is installed at the end of one of the guide rods on the second disc.

[0011] Preferably, a base plate is installed at the lower part of the vertical plate, and a T-shaped block is installed at the top of the bottom of the base plate away from the vertical plate. A limiting groove that mates with the T-shaped block is provided at the bottom of the housing. The T-shaped block is made of rubber.

[0012] Preferably, a hanging plate is installed on the upper part of the horizontal plate, the hanging plate has hanging holes, and a reinforcing rib is installed at the connection between the horizontal plate and the vertical plate.

[0013] Preferably, a cover plate is detachably mounted on the housing by screws.

[0014] The beneficial effects of this invention are: 1) Solve the technical problem that the existing cable trolley has no additional locking structure and the pins are prone to accidental falling off, causing safety accidents. Achieve multiple locking protections for the trolley and improve the safety and stability of the equipment in complex outdoor construction conditions.

[0015] 2) The spring in the locking mechanism provides continuous preload to the second disc, ensuring stable insertion of the locking rod and the locking hole. This makes the locking mechanism less prone to accidental disengagement when the equipment vibrates or bumps, thus improving the working stability of the locking structure. At the same time, through the sliding cooperation of the drive rod and the drive plate, the up-and-down linear motion of the drive rod is converted into the left-and-right linear motion of the second disc, enabling the locking mechanism to unlock quickly. This makes the operation convenient and improves construction efficiency.

[0016] 3) The additional safety mechanism adjusts the relative position of the limiting ring and the guide rod through the threaded cap, thereby limiting or releasing the unlocking action of the locking mechanism. The first and second indicator bars on the extension tube make the working position of the cap visible, allowing the operator to quickly determine the working status of the additional safety mechanism. The cap also provides a sealing protection for the guide rod, preventing external dust and debris from entering the housing and affecting the normal operation of the locking mechanism.

[0017] 4) This invention is equipped with an emergency pull ring. When the drive rod is broken, stuck, or otherwise unable to unlock normally, the emergency pull ring can be pulled after removing the cap to unlock the locking mechanism. This improves the equipment's fault tolerance and ease of construction. The rubber T-block and the limiting groove at the bottom of the housing can form a closed structure with the frame and housing to prevent external cables and ropes from accidentally getting caught in the connection between the pulley and the horizontal shaft. It can also provide a return force to the housing through elastic deformation when the housing rotates, and at the same time play an auxiliary limiting role in the rotation of the housing.

[0018] 5) The overall structure of this invention is simple and reasonable, and the connection of each component is reliable. The shell adopts a rectangular structure with vertical connection, which is suitable for the installation layout of the horizontal axis and the internal locking mechanism. The frame is equipped with reinforcing ribs to improve the structural strength and load-bearing capacity. The shell is equipped with a detachable cover plate to facilitate the inspection, maintenance and component replacement of the internal locking mechanism by the staff. Attached Figure Description

[0019] Appendix Figure 1 This is a front view of Embodiment 1 of the present invention; Appendix Figure 2 This is a partial cross-sectional view of Embodiment 1 of the present invention; Appendix Figure 3 This is a partial cross-sectional view of Embodiment 2 of the present invention; Appendix Figure 4 for Figure 3 Enlarged view of the central locking mechanism; Appendix Figure 5 This is a left view of the first disc body in this invention; Appendix Figure 6 This is an isometric view of the first disc body in this invention; Appendix Figure 7 This is a left view of the second disc body in this invention; Appendix Figure 8 This is a right view of the second disc body in this invention; Appendix Figure 9 This is an isometric view of the screw cap body in this invention.

[0020] In the picture: 1. Frame; 101. Vertical panel; 102. Base plate; 103. Horizontal panel; 104. Hanging panel; 2. Housing; 201. T-block; 202. Limiting groove; 203. Limiting plate; 204. Pin; 205. Cover plate; 206. Guide block; 3. Pulley; 301. Horizontal shaft; 4. Locking mechanism; 401. First disc; 402. Second disc; 403. Locking rod; 404. Guide rod; 405. Spring; 406. Drive plate; 407. Inclined groove; 408. Drive rod; 409. Emergency pull ring; 410. Drive pull ring; 411. Locking hole; 5. Additional safety mechanism; 501. Extension tube; 502. Screw cap; 503. Limiting ring; 504. First indicator bar; 505. Second indicator bar. Detailed Implementation

[0021] The following is in conjunction with the appendix Figure 1 -Appendix Figure 9The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not 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 effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this invention, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0023] Example 1 like Figure 1 , Figure 2 , Figures 4-9 As shown, a trolley for overhead line construction in power transmission line engineering includes a frame 1 and pulleys 3. The frame 1 includes a vertical plate 101, a horizontal plate 103 is installed on the upper part of the vertical plate 101, and a hanging plate 104 is installed on the upper part of the horizontal plate 103. The hanging plate 104 has a suspension hole. A reinforcing rib is installed at the connection between the horizontal plate 103 and the vertical plate 101. A horizontal shaft 301 is fixedly installed on the lower part of the vertical plate 101. The pulleys 3 are rotatably installed on the horizontal shaft 301. A housing 2 is rotatably installed at the end of the horizontal shaft 301 away from the vertical plate 101. The housing 2 is composed of two connected rectangular bodies, the width of the upper rectangle is smaller than the width of the lower rectangle. The horizontal shaft 301 passes through the lower part of the housing 2, and the housing 2 and the horizontal shaft 301 cannot slide laterally. A cover plate 205 is detachably installed on the housing 2 by screws.

[0024] A limiting plate 203 is installed on the side of the middle of the housing 2 near the horizontal plate 103. The limiting plate 203 is located below the horizontal plate 103 and is detachably connected to the horizontal plate 103 by a pin 204. The housing 2 is also provided with a locking mechanism 4 that cooperates with the horizontal shaft 301.

[0025] Specifically, such as Figure 4As shown, the first disc 401 and the second disc 402 are both mounted on the horizontal shaft 301. The first disc 401 is fixedly mounted on the horizontal shaft 301, and a plurality of locking holes 411 are evenly distributed on the side wall near the second disc 402. The second disc 402 is movably mounted on the horizontal shaft 301 and can slide left and right along the horizontal shaft 301. A plurality of locking holes 411 are evenly distributed on the side wall of the second disc 402 near the first disc 401. A locking rod 403 is fitted with a hole 411. The locking rod 403 can be inserted into the locking hole 411 on the first disc 401. Guide rods 404 are fixedly installed at the upper and lower ends of the side wall of the second disc 402 away from the locking rod 403. The guide rods 404 pass through the housing 2 and are slidably connected to the housing 2. The housing 2 has a through hole that fits with the guide rods 404. A spring 405 is sleeved between the side wall of the second disc 402 and the inner wall of the housing 2, and on the horizontal shaft 301.

[0026] The locking rod 403 on the second disc 402 is inserted into the locking hole 411 on the first disc 401 to lock the housing 2 and the frame 1. Since the spring 405 in the housing 2 provides a certain preload to the second disc 402, the equipment is not easy to accidentally disengage under bumpy or vibrating conditions.

[0027] A drive plate 406 is mounted on the top of the second disc body 402. A drive rod 408 that can slide up and down is movably mounted inside the housing 2. A slanted groove 407 that cooperates with the drive rod 408 is provided on the drive plate 406. The top end of the drive rod 408 passes through the housing 2 and extends to the outside of the housing 2. The bottom end of the drive rod 408 is installed in the slanted groove 407 on the drive plate 406. A guide block 206 that can slide up and down is movably mounted inside the housing 2. The guide block 206 is fixedly connected to the drive rod 408. A drive pull ring 410 is mounted on the top of the drive rod 408.

[0028] When the locking mechanism 4 is in the locked state, the second disc 402, under the preload of the spring 405, firmly inserts the locking rod 403 into the locking hole 411 of the first disc 401.

[0029] When the locking mechanism 4 needs to be unlocked, the drive ring 410 pulls the drive rod 408 upward. The drive rod 408 cooperates with the inclined groove 407 on the drive plate 406, causing the second disc 402 to move to the right after overcoming the preload of the spring 405, thereby pulling the locking rod 403 out of the locking hole 411 of the first disc 401 and completing the unlocking.

[0030] An additional safety mechanism 5, which cooperates with the locking mechanism 4, is provided on the side wall of the housing 2 away from the pulley 3.

[0031] Specifically, such as Figure 1-2 , Figure 4 As shown, the additional safety mechanism 5 includes an extension cylinder 501 and a cap 502. The extension cylinder 501 is located around the two guide rods and is installed on the side wall of the housing 2. The cap 502 is threaded onto the end of the extension cylinder 501. A limiting ring 503 that cooperates with the guide rod 404 on the second disc 402 is installed inside the cap 502. A first indicator strip 504 and a second indicator strip 505 are also provided on the outer wall of the extension cylinder 501.

[0032] The cap 502 also provides a certain degree of sealing protection for the guide rod 404, preventing external dust from entering the additional safety mechanism 5 and the locking mechanism 4.

[0033] When the locking mechanism 4 is in the locked state: when the cap 502 is aligned with the first indicator bar 504, the limiting ring 503 will not affect the guide rod 404 on the second disc 402 from moving to the right. At this time, pulling the drive ring 410 upward can unlock the locking mechanism 4. When the cap 502 is aligned with the second indicator bar 505, the limiting ring 503 is in close contact with the guide rod 404 on the second disc 402, preventing it from moving to the right. At this time, pulling the drive ring 410 upward cannot unlock the locking mechanism 4.

[0034] An emergency pull ring 409 is installed at the end of one of the guide rods 404 on the second disc body 402. When the drive rod 408 is accidentally broken or other malfunctions occur, the cap 502 can be removed and the emergency pull ring 409 on the guide rod 404 can be pulled to unlock it.

[0035] Example 2 like Figure 3 As shown, based on Embodiment 1, a base plate 102 is installed at the lower part of the vertical plate 101. The device can stand on the ground by sliding the base plate 102, avoiding damage to the pulley 3. A T-shaped block 201 is installed at the top of the bottom of the housing 2, away from the vertical plate 101. A limiting groove 202 that cooperates with the T-shaped block 201 is provided at the bottom of the housing 2. The T-shaped block 201 and the limiting groove 202 can form a closed square with the frame 1 and the housing 2, which can prevent external cables and ropes from accidentally contacting the pulley 3 or getting caught in the cooperation between the pulley 3 and the horizontal axis 301 to a certain extent. The T-shaped block 201 is made of rubber. When the housing 2 rotates relative to the horizontal axis 301, the T-shaped block 201 is compressed, which can give the housing 2 a return force.

[0036] A pulley for stringing power transmission lines, the working process of which is as follows: First, align the screw cap 502 with the first indicator strip 504 on the extension tube 501 to release the restriction of the additional safety mechanism 5 on the locking mechanism 4. The second step is to remove the pin 204 between the horizontal plate 103 on frame 1 and the limiting plate 203 on housing 2. The third step is to pull the drive rod 408 upward by driving the pull ring 410. The drive rod 408 cooperates with the inclined groove 407 on the drive plate 406, so that the second disc 402 moves to the right after overcoming the preload of the spring 405, thereby pulling the locking rod 403 out of the locking hole 411 of the first disc 401 and completing the unlocking. Fourth step: After unlocking, rotate the housing 2 by hand to create a notch and separate the power supply cable and cable trolley.

[0037] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A trolley for overhead line construction in power transmission line engineering, comprising a frame and pulleys, wherein the frame includes a vertical plate, a horizontal plate is installed on the upper part of the vertical plate, a horizontal shaft is fixedly installed on the lower part of the vertical plate, and the pulleys are rotatably mounted on the horizontal shaft; Its features are, It also includes a housing, which is rotatably mounted on the end of the horizontal axis away from the vertical plate. The housing is composed of two connected rectangular bodies, with the width of the upper rectangle being smaller than the width of the lower rectangle. The horizontal axis passes through the lower part of the housing. A limiting plate is installed on the middle part of the housing near the horizontal plate. The limiting plate is located below the horizontal plate and is detachably connected to the horizontal plate by a pin. The housing is also equipped with a locking mechanism that cooperates with the horizontal axis. An additional safety mechanism that cooperates with the locking mechanism is provided on the side wall of the housing away from the pulley.

2. The overhead line construction pulley for power transmission line engineering according to claim 1, characterized in that, The locking mechanism includes a first disc and a second disc, both mounted on a horizontal axis. The first disc is fixedly mounted on the horizontal axis, and a plurality of locking holes are evenly distributed on the side wall near the second disc. The second disc is movably mounted on the horizontal axis and can slide left and right along the horizontal axis. A plurality of locking rods that mate with the locking holes are evenly distributed on the side wall of the second disc near the first disc. The locking rods can be inserted into the locking holes on the first disc. Guide rods are fixedly mounted at the upper and lower ends of the side wall of the second disc away from the locking rods. The guide rods pass through the housing and are slidably connected to the housing. The housing has through holes that mate with the guide rods. A spring is sleeved between the side wall of the second disc and the inner wall of the housing, and on the horizontal axis.

3. The overhead line construction pulley for power transmission line engineering according to claim 2, characterized in that, A drive plate is installed on the top of the second disc body. A drive rod that can slide up and down is movably installed inside the housing. A slanted groove that cooperates with the drive rod is opened on the drive plate. The top end of the drive rod passes through the housing and extends to the outside of the housing. The bottom end of the drive rod is installed in the slanted groove on the drive plate.

4. The overhead line construction pulley for power transmission line engineering according to claim 3, characterized in that, The housing contains a sliding guide block that can slide up and down, and the guide block is fixedly connected to the drive rod.

5. The overhead line construction pulley for power transmission line engineering according to claim 3, characterized in that, A drive pull ring is installed at the top of the drive rod.

6. The overhead line construction pulley for power transmission line engineering according to claim 2, characterized in that, The additional safety mechanism includes an extension cylinder and a cap. The extension cylinder is located around the two guide rods and is installed on the side wall of the housing. The cap is threaded onto the end of the extension cylinder. A limiting ring that mates with the guide rod on the second disc is installed inside the cap. A first indicator strip and a second indicator strip are also provided on the outer wall of the extension cylinder.

7. The overhead line construction pulley for power transmission line engineering according to claim 2, characterized in that, An emergency pull ring is installed at the end of one of the guide rods on the second disc.

8. The overhead line construction pulley for power transmission line engineering according to claim 1, characterized in that, A base plate is installed at the lower part of the vertical plate. A T-shaped block is installed at the top of the bottom of the base plate away from the vertical plate. A limiting groove that mates with the T-shaped block is provided at the bottom of the housing. The T-shaped block is made of rubber.

9. The overhead line construction pulley for power transmission line engineering according to claim 1, characterized in that, A hanging plate is installed on the upper part of the horizontal plate, and a hanging hole is provided on the hanging plate. A reinforcing rib is installed at the connection between the horizontal plate and the vertical plate.

10. A pulley for overhead line construction in power transmission line engineering according to claim 1, characterized in that, A cover plate is detachably mounted on the housing by screws.

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