Self-adaptive open-type wire lifting pulley for laying ground wire

Abstract

The invention relates to a self-adaptive open-type wire lifting tackle for laying ground wires, and belongs to the technical field of wire lifting tackles. The self-adaptive open-type wire lifting tackle comprises a support, a guide wheel is rotatably installed on the support, the top of a long side rod of the support is hinged to one side of a connecting plate, the top of a short side rod of the support is fixedly connected with an eccentric wheel assembly, and a locking lifting lug assembly is hinged to the upper portion of the eccentric wheel assembly; the locking lifting lug assembly is hinged to the other side of the connecting plate. Centring valve assemblies are rotationally connected to the interiors of two side rods of the bracket; a gap through which a cable can pass is reserved between the two centering valve assemblies; the locking pins and the unlocking rods are arranged in the centering valve assemblies, when a cable passes through a gap between the two centering valve assemblies, mechanical unlocking can be achieved, and the situation that the cable cannot enter the middle guide wheel due to vibration of the centering valve during paying off is avoided; meanwhile, the centering valve assembly can turn over up and down around the rotating joint, the upper space of the guide wheels at the two ends is not occupied, the utilization rate is higher, and the production cost is reduced.

Description

Technical Field

[0001] This invention relates to an adaptive open-type wire lifting trolley for laying ground wires, belonging to the technical field of wire lifting trolleys. Background Technology

[0002] A pulley system is a specialized tool used in the construction of overhead power transmission lines to lift and support conductors and ground wires (conductors and lightning protection wires). It is typically installed on the crossarm of the tower and is mainly used to lift the deployed conductors from their temporary position to insulators or fittings for fixation. It is a key piece of equipment in the process of laying, tightening, and installing accessories for conductors and ground wires. Currently, most existing pulley systems require operators to climb to a high altitude to pass the cable through the pulley's guide wheels. This method not only poses significant safety hazards but also results in low construction efficiency.

[0003] The existing Chinese invention patent, CN113629583B, discloses an upgraded module and a wire-feeding pulley for a wire-feeding trolley. The upgraded module includes: an eccentric rotation module for guiding the guide rope into the wire-feeding trolley, a first clamping member connected to the eccentric rotation module, and a sensing module for mounting to the wire-feeding trolley. The first clamping member includes: a sliding plate, a first clamping plate, a second clamping plate, and a tightening bolt. The sliding plate has a groove and a mounting hole. The first and second clamping plates can slide along the groove, and the tightening bolt is threaded into the mounting hole. Using drones to lay cables via open-type cable laying trolleys presents several challenges. When the cable enters the trolley, the movement of the eccentric wheel causes severe vibrations in the frame. Since the centering valve module is not locked, it also swings back and forth, potentially preventing the cable from accurately landing in the central guide wheel or even causing it to jam. This necessitates operators climbing to adjust the cable position, making it inconvenient. Furthermore, the centering valve module's swinging design occupies the upper space of the guide wheels on both sides. If multiple cables need to be laid side-by-side later, it needs to be enlarged, increasing production costs. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an adaptive open-type wire lifting trolley for laying ground wires, wherein a locking device is provided on the centering gate to achieve mechanical unlocking and avoid the situation where the vibration of the centering gate during laying causes the cable to be unable to enter the center guide wheel.

[0005] The adaptive open-type cable-lifting trolley for laying ground wires according to the present invention includes a bracket with several guide wheels rotatably mounted on it. The two side rods of the bracket are asymmetrically designed. The top of the longer side rod of the bracket is hinged to one side of a connecting plate, and the top of the shorter side rod of the bracket is fixedly connected to an eccentric wheel assembly. A locking lug assembly is hinged above the eccentric wheel assembly and is hinged to the other side of the connecting plate. Centering valve assemblies are rotatably connected inside the two side rods of the bracket. The centering valve assemblies can rotate up and down around the rotatable connection. A gap is left between the two centering valve assemblies to accommodate the passage of cables. The centering valve assembly includes a triangular plate, with a locking pin and an unlocking rod elastically connected to the lower part of the triangular plate. The locking pin is adapted to the locking hole on the bracket. Before the cable passes through the gap between the two centering valve assemblies, the locking pin locks the centering valve assembly; during the process of the cable passing through the gap between the two centering valve assemblies, the unlocking rod unlocks the centering valve assembly.

[0006] Preferably, the triangular plate has a locking pin mounting cavity and an unlocking rod mounting cavity below it. The locking pin mounting cavity and the unlocking rod mounting cavity are separated by a perforated partition and connected through an opening in the perforated partition. The locking pin is located in the locking pin mounting cavity. The locking pin includes a locking shaft and a locking cap. The locking cap is made of carbon steel and its diameter is adapted to the locking pin mounting cavity. A tension spring is sleeved on the locking shaft. One end of the tension spring is fixedly connected to the locking cap, and the other end of the tension spring is fixedly connected to the end plate on one side of the triangular plate. The locking pin is elastically connected to the triangular plate through the tension spring. The unlocking rod includes a thick rod section and a thin rod section. The thick rod section is located in the unlocking rod mounting cavity, and its diameter is adapted to the unlocking rod mounting cavity. The thin rod section extends into the locking pin mounting cavity after passing through the perforated partition. One end of the thick rod section is hemispherical, and a magnet is fixedly installed at the end of the thin rod section located in the locking pin mounting cavity. A compression spring is sleeved on the thin rod section. One end of the compression spring is fixedly connected to the thick rod section, and the other end of the compression spring is fixedly connected to the perforated partition. The unlocking rod is elastically connected to the triangular plate through the compression spring. The elastic force of the compression spring is greater than that of the tension spring. When the central valve assembly is locked, the locking pin, under the tension of the tension spring, passes through the opening on the end plate of the triangular plate and enters the locking hole of the bracket; under the action of the compression spring, the spherical end of the thick rod protrudes from the triangular plate.

[0007] Furthermore, the lock cap is provided with a locking pin handle, the thick rod is provided with an unlocking rod handle, and the bottom of the triangular plate is provided with a locking pin limiting groove and an unlocking rod limiting groove. The locking pin handle passes through the locking pin limiting groove, and the unlocking rod handle passes through the unlocking rod limiting groove. The positions of the locking pin and the unlocking rod can be easily adjusted in the future through the locking pin handle and the unlocking rod handle.

[0008] Preferably, the eccentric wheel assembly includes an eccentric wheel and an eccentric wheel mounting base. The eccentric wheel mounting base is provided with an arc-shaped groove, and the eccentric wheel is rotatably disposed in the arc-shaped groove. Limiting platforms are provided on both sides of the arc-shaped groove. The limiting platforms are adapted to the annular limiting groove on the eccentric wheel. The eccentric wheel is limited by the cooperation between the limiting platforms and the annular limiting groove to prevent it from falling out of the eccentric wheel mounting base.

[0009] Furthermore, the eccentric wheel is machined with a U-shaped notch for accommodating cables; an eccentric shaft is also provided through the eccentric wheel, and the eccentric wheel is hinged to the locking lug in the locking lug assembly via the eccentric shaft.

[0010] Preferably, guide arms are fixedly connected to both sides of the eccentric wheel mounting base, and the guide arms have a U-shaped structure.

[0011] Preferably, the locking lug assembly includes a locking lug, on which a lever is hinged, and the lever is elastically connected to the locking lug via a torsion spring.

[0012] Preferably, the lever is provided with a limiting block, and the eccentric wheel is provided with a rotation limiting groove that cooperates with the limiting block. Before the cable enters the U-shaped notch of the eccentric wheel, the lever, under the action of the torsion spring, pushes the limiting block into the rotation limiting groove, so that the U-shaped notch of the eccentric wheel is in an oblique upward state, thereby locking the eccentric wheel.

[0013] The beneficial effects of this invention compared to the prior art are: The adaptive open-type cable-lifting trolley for laying ground wire described in this invention, by setting a locking pin and an unlocking rod in the centering valve assembly, can achieve mechanical unlocking when the cable passes through the gap between the two centering valve assemblies, avoiding the situation where the vibration of the centering valve during cable laying prevents the cable from entering the central guide wheel; at the same time, the centering valve assembly can rotate up and down around the rotating connection, without occupying the upper space of the guide wheels at both ends, resulting in higher utilization and reduced production costs. Attached Figure Description Figure 1 This is a schematic diagram of the structure of the present invention in the unlocked state; Figure 2 This is a schematic diagram of the structure of the present invention in the locked state; Figure 3 This is a cross-sectional view of the invention in a locked state; Figure 4 This is a cross-sectional view of the central valve assembly; Figure 5 This is a cross-sectional view of the locking lug assembly; Figure 6 This is a structural diagram of the bracket and guide wheel; Figure 7 It is a 3D diagram of a set square; Figure 8 This is a sectional view of a set square; Figure 9 It is a 3D diagram of the unlocking lever; Figure 10 It is a 3D diagram of the locking pin; Figure 11 It is a 3D view of the eccentric wheel mounting base; Figure 12 It is a 3D diagram of an eccentric wheel; Figure 13 It is a 3D diagram of the lever; Figure 14 This is a schematic diagram showing the state of the cable before it passes through the gap between the two pairs of central valve components; Figure 15 This is a schematic diagram showing the state of the cable located in the gap between two pairs of central valve assemblies; Figure 16 This is a schematic diagram showing the state of the cable after it passes through the gap between the two pairs of central valve assemblies.

[0014] In the diagram: 1. Connecting plate; 2. Locking lug assembly; 21. Locking lug; 22. Torsion spring; 23. Lever; 231. Limiting block; 3. Eccentric wheel assembly; 31. Eccentric wheel; 311. U-shaped notch; 312. Eccentric shaft; 313. Rotational limiting groove; 314. Annular limiting groove; 32. Guide arm; 33. Eccentric wheel mounting base; 331. Arc groove; 332. Limiting platform; 4. Guide wheel; 5. Bracket; 51. Locking hole; 6. Centering valve Components; 61. Triangle plate; 611. Perforated partition; 612. End plate; 613. Unlocking rod limiting groove; 614. Locking pin limiting groove; 615. Unlocking rod mounting cavity; 616. Locking pin mounting cavity; 62. Unlocking rod; 621. Thick rod section; 622. Thin rod section; 623. Magnet; 624. Unlocking rod handle; 63. Compression spring; 64. Locking pin; 641. Lock cap; 642. Lock shaft; 643. Locking pin handle; 65. Tension spring; 7. Cable. Detailed Implementation

[0015] like Figures 1-16 As shown, this embodiment is achieved through the following technical solution: It includes a bracket 5, on which several guide wheels 4 are rotatably mounted. The two side rods of the bracket 5 are asymmetrically designed. The top of the longer side rod of the bracket 5 is hinged to one side of the connecting plate 1. The top of the shorter side rod of the bracket 5 is fixedly connected to an eccentric wheel assembly 3. A locking lug assembly 2 is hinged above the eccentric wheel assembly 3, and the locking lug assembly 2 is hinged to the other side of the connecting plate 1. A centering valve assembly 6 is rotatably connected inside the two side rods of the bracket 5. The centering valve assembly 6 can rotate up and down around the rotatable connection point. A gap is left between the two centering valve assemblies 6 for the passage of an adapter cable 7. The centering valve assembly 6 includes a triangular plate 61. A locking pin 64 and an unlocking rod 62 are elastically connected to the lower part of the triangular plate 61. The locking pin 64 is adapted to the locking hole 51 on the bracket 5. Before the cable 7 passes through the gap between the two centering valve assemblies 6, the locking pin 64 locks the centering valve assembly 6. During the process of the cable 7 passing through the gap between the two centering valve assemblies 6, the unlocking rod 62 unlocks the centering valve assembly 6.

[0016] In this embodiment, the triangular plate 61 is provided with a locking pin mounting cavity 616 and an unlocking rod mounting cavity 615 below it. The locking pin mounting cavity 616 and the unlocking rod mounting cavity 615 are separated by a perforated partition 611 and are connected through an opening on the perforated partition 611. The locking pin 64 is located in the locking pin mounting cavity 616. The locking pin 64 includes a locking shaft 642 and a locking cap 641. The locking cap 641 is made of carbon steel and its diameter is adapted to the locking pin mounting cavity 616. A tension spring 65 is sleeved on the locking shaft 642. One end of the tension spring 65 is fixedly connected to the locking cap 641, and the other end of the tension spring 65 is fixedly connected to the end plate 612 on one side of the triangular plate. The locking pin 64 is elastically connected to the triangular plate 61 through the tension spring 65. The unlocking rod 62 includes a thick rod portion 621 and a thin rod portion 622. The thick rod portion 621 is located in the unlocking rod mounting cavity 615, and its diameter is adapted to the unlocking rod mounting cavity 615. The thin rod portion 622 passes through the perforated partition 611 and extends into the locking pin mounting cavity 616. One end of the thick rod portion 621 is hemispherical. A magnet 623 is fixedly installed at one end of the thin rod portion 622 located in the locking pin mounting cavity 616. A compression spring 63 is sleeved on the thin rod portion 622. One end of the compression spring 63 is fixedly connected to the thick rod portion 621, and the other end of the compression spring 63 is fixedly connected to the perforated partition 611. The unlocking rod 62 is elastically connected to the triangular plate 61 through the compression spring 63. The elastic force of the compression spring 63 is greater than that of the tension spring 65. When the central valve assembly 6 is locked, the locking pin 64, under the tension of the tension spring 65, causes the locking shaft 642 to pass through the opening on the end plate 612 of the triangular plate and enter the locking hole 51 of the bracket 5; under the action of the compression spring 63, the spherical end of the thick rod 621 protrudes out of the triangular plate 61.

[0017] The lock cap 641 is provided with a locking pin handle 643, and the thick rod part 621 is provided with an unlocking rod handle 624. The bottom of the triangular plate 61 is provided with a locking pin limiting groove 614 and an unlocking rod limiting groove 613. The locking pin handle 643 passes through the locking pin limiting groove 614, and the unlocking rod handle 624 passes through the unlocking rod limiting groove 613. The positions of the locking pin 64 and the unlocking rod 62 can be easily adjusted later through the locking pin handle 643 and the unlocking rod handle 624.

[0018] The eccentric wheel assembly 3 includes an eccentric wheel 31 and an eccentric wheel mounting base 33. The eccentric wheel mounting base 33 is provided with an arc-shaped groove 331. The eccentric wheel 31 is rotatably disposed in the arc-shaped groove 331. Limiting platforms 332 are provided on both sides of the arc-shaped groove 331. The limiting platforms 332 are adapted to the annular limiting groove 314 on the eccentric wheel 31. The eccentric wheel 31 is limited by the cooperation between the limiting platforms 332 and the annular limiting groove 314 to prevent it from falling out of the eccentric wheel mounting base 33.

[0019] The eccentric wheel 31 has a U-shaped notch 311 machined on it to accommodate the cable 7; an eccentric shaft 312 is also provided through the eccentric wheel 31, and the eccentric wheel 31 is hinged to the locking lug 21 in the locking lug assembly 2 through the eccentric shaft 312. Guide arms 32 are fixedly connected to both sides of the eccentric wheel mounting base 33, and the guide arms 32 have a U-shaped structure.

[0020] The locking lug assembly 2 includes a locking lug 21, on which a lever 23 is hinged. The lever 23 is also elastically connected to the locking lug 21 via a torsion spring 22. The lever 23 is provided with a limiting block 231, and the eccentric wheel 31 is provided with a rotation limiting groove 313 that cooperates with the limiting block 231. Before the cable 7 enters the U-shaped notch 311 of the eccentric wheel 31, the lever 23, under the action of the torsion spring 22, pushes the limiting block 231 into the rotation limiting groove 313, so that the U-shaped notch 311 of the eccentric wheel 31 is in an upward angle, thereby locking the eccentric wheel 31.

[0021] The working process of this invention is as follows: 1. The drone carrying cable 7 is raised to the vicinity of this device, and cable 7 is placed on the guide arm 32, so that cable 7 slides down along the guide arm 32 to the vicinity of lever 23; 2. The drone continues to pull the cable 7 towards the inside of the device, so that the tension of the cable 7 overcomes the elastic force exerted by the torsion spring 22 on the lever 23, and the limiting block 231 of the lever disengages from the rotation limiting slot 313; at the same time, the cable 7 enters the U-shaped notch 311 of the eccentric wheel 31, and under the action of gravity, the eccentric wheel 31 rotates, bringing the cable 7 into the inside of the device. 3. The drone continues to pull the cable 7 downward. During the movement, the cable 7 pushes the unlocking rods 62 on both sides to compress the springs 63. The unlocking rods 62 retract into the triangular plate 61, and the magnet 623 contacts and attracts the locking pin 64. 4. Cable 7 continues to move to below triangle plate 61, and after disengaging from the unlocking rods 62 on both sides, it falls into the groove of the middle guide wheel 4; at this time, the compression spring 63 resets, and at the same time pulls the locking pin 64 to overcome the tension of the tension spring 65, so that the locking shaft 642 disengages from the locking hole 51, and the central valve assembly 6 is unlocked. 5. Later, the cable can be pulled through this device using a walkway, and the centering valve components 6 on both sides will not cause interference.

Claims

1. An adaptive open-type wire-lifting trolley for laying ground wires, characterized in that, Includes a bracket (5), on which several guide wheels (4) are rotatably mounted. The two side rods of the bracket (5) are asymmetrically designed. The top of the longer side rod of the bracket (5) is hinged to one side of the connecting plate (1). The top of the shorter side rod of the bracket (5) is fixedly connected to an eccentric wheel assembly (3). A locking lug assembly (2) is hinged above the eccentric wheel assembly (3). The locking lug assembly (2) is hinged to the other side of the connecting plate (1). The two side rods of the bracket (5) are rotatably connected to a centering valve assembly (6). A gap is left between the two centering valve assemblies (6) for the adapter cable (7) to pass through. The centering valve assembly (6) includes a triangular plate (61), and a locking pin (64) and an unlocking rod (62) are elastically connected inside the lower part of the triangular plate (61). The locking pin (64) is adapted to the locking hole (51) on the bracket.

2. The adaptive open-type wire-lifting trolley for laying conductors according to claim 1, characterized in that, The triangular plate (61) is provided with a locking pin mounting cavity (616) and an unlocking rod mounting cavity (615) below it. The locking pin mounting cavity (616) and the unlocking rod mounting cavity (615) are separated by a perforated partition (611) and are connected through the opening on the perforated partition (611). The locking pin (64) is located in the locking pin mounting cavity (616). The locking pin (64) includes a locking shaft (642) and a locking cap (641). The diameter of the locking cap (641) is adapted to the locking pin mounting cavity (616). A tension spring (65) is sleeved on the locking shaft (642). One end of the tension spring (65) is fixedly connected to the locking cap (641), and the other end of the tension spring (65) is fixedly connected to the end plate (612) on one side of the triangular plate. The locking pin (64) is elastically connected to the triangular plate (61) through the tension spring (65).

3. The adaptive open-type wire-lifting trolley for laying conductors according to claim 2, characterized in that, The unlocking rod (62) includes a thick rod portion (621) and a thin rod portion (622). The thick rod portion (621) is located in the unlocking rod mounting cavity (615), and the diameter of the thick rod portion (621) is adapted to the unlocking rod mounting cavity (615). The thin rod portion (622) extends into the locking pin mounting cavity (616) after passing through the perforated partition (611). One end of the thick rod portion (621) is hemispherical, and a magnet (623) is fixedly installed at one end of the thin rod portion (622) located in the locking pin mounting cavity (616). A compression spring (63) is sleeved on the thin rod portion (622). One end of the compression spring (63) is fixedly connected to the thick rod portion (621), and the other end of the compression spring (63) is fixedly connected to the perforated partition (611). The unlocking rod (62) forms an elastic connection with the triangular plate (61) through the compression spring (63). The elastic force of the compression spring (63) is greater than that of the tension spring (65).

4. The adaptive open-type wire-lifting trolley for laying conductors according to claim 3, characterized in that, The lock cap (641) is provided with a lock stop pin handle (643), the thick rod part (621) is provided with an unlocking rod handle (624), the bottom of the triangular plate (61) is provided with a lock stop pin limiting groove (614) and an unlocking rod limiting groove (613), the lock stop pin handle (643) passes through the lock stop pin limiting groove (614), and the unlocking rod handle (624) passes through the unlocking rod limiting groove (613).

5. The adaptive open-type wire-lifting trolley for laying conductors according to claim 1, characterized in that, The eccentric wheel assembly (3) includes an eccentric wheel (31) and an eccentric wheel mounting base (33). The eccentric wheel mounting base (33) is provided with an arc groove (331). The eccentric wheel (31) is rotatably disposed in the arc groove (331). Limiting platforms (332) are provided on both sides of the arc groove (331). The limiting platforms (332) are adapted to the annular limiting groove (314) on the eccentric wheel.

6. The adaptive open-type wire-lifting trolley for laying conductors according to claim 5, characterized in that, The eccentric wheel (31) is machined with a U-shaped notch (311) for accommodating the cable (7); the eccentric wheel (31) is also provided with an eccentric shaft (312), and the eccentric wheel (31) is hinged to the locking lug (21) in the locking lug assembly (2) through the eccentric shaft (312).

7. The adaptive open-type wire-lifting trolley for laying conductors according to claim 5, characterized in that, The guide arms (32) are fixedly connected to both sides of the eccentric wheel mounting base (33).

8. The adaptive open-type wire-lifting trolley for laying conductors according to claim 6, characterized in that, The locking lug assembly (2) includes a locking lug (21), on which a lever (23) is hinged, and the lever (23) is elastically connected to the locking lug (21) through a torsion spring (22).

9. The adaptive open-type wire-lifting trolley for laying conductors according to claim 8, characterized in that, The lever (23) is provided with a limiting block (231), and the eccentric wheel (31) is provided with a rotation limiting groove (313) that cooperates with the limiting block (231).

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