Extensible pulley device

Abstract

The utility model relates to an extensible pulley device, which comprises a support main body, the support main body comprises a connecting seat and a plurality of support bodies connected with the connecting seat, the plurality of support bodies are circularly distributed around the center of the connecting seat, and the plurality of support bodies have a contraction state and an expansion state; the first telescopic rods are located on the same plane and radiate in the radial direction with the connecting base as the center, one end of any first telescopic rod is connected with the connecting base, the other end of any first telescopic rod is connected with one supporting body, and the first telescopic rods extend to drive the supporting bodies to move from the contraction state to the expansion state in the radial direction at the same time; when the multiple supporting bodies are in the expansion state, the filling blocks are seamlessly spliced between every two adjacent supporting bodies; according to the utility model, the contact area between the tackle and the coiled tubing is increased, and the turning radius of the coiled tubing is increased, so that the phenomenon that the coiled tubing jumps out of the tackle when turning by 90 degrees on the tackle is greatly reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power construction, in particular to an expandable pulley device. Background Art

[0002] In today's society, overhead transmission lines are one of the common facilities in circuit engineering. Currently, most overhead transmission lines are laid in mountainous areas with large height differences. Some mountainous areas have extreme situations where the terrain difference is too large. If the lines are laid directly, not only will the wires be unable to go directly to the tower, but the wire laying angle is too large, which may also cause internal damage or loosening and bulging. Therefore, the existing wires need to use ordinary pulleys to make double 90-degree turns before they can go up the tower. Specifically, one end of the wire first reaches the bottom of the tower at a small angle, and then bypasses the pulley at the first 90-degree angle to turn vertically and rise to the top of the tower. Then, the second 90-degree angle bypasses the pulley and turns vertically parallel to the ground to other towers. The pulley is a component used to realize the steering, support, and friction reduction of the guide rail. Usually, the ends of the two wires are connected by a continuous tube, and the ordinary pulley The inflexible joint pipe cannot be passed smoothly because it often jumps out when passing through the pulley, causing damage to the wire. The conventional construction steps are relatively cumbersome: first, after the joint pipe is pulled to the vicinity of the pulley, the traction machine and the tension machine are stopped; second, the worker uses the wire clamp to clamp the wire on the side of the pulley close to the tower, and connects the hand-operated hoist, which is fixed on the tower; third, tighten the hoist and work with the traction machine to tighten and fix the wire; fourth, start the tension machine and release the wire so that the wire from the wire clamp to the tension machine section is not stressed; fifth, slowly loosen the hoist to release the wire, and at the same time cooperate to pass the joint pipe through the pulley; sixth, after the joint pipe passes the pulley, continue to loosen the hoist until the wire behind the wire clamp is stressed again; seventh, remove the wire clamp and release it normally until the joint pipe reaches the next pulley, and repeat the above steps. The above construction steps are cumbersome and difficult, and waste a lot of time, which seriously affects the construction progress. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the coiled tubing cannot smoothly pass through the pulley, and further provide an expandable pulley device, which increases the contact area between the pulley and the coiled tubing and increases the turning radius of the coiled tubing, thereby greatly reducing the phenomenon of the coiled tubing jumping out of the pulley when turning 90 degrees on the pulley, thereby improving the construction efficiency.

[0004] In order to solve the above technical problems, the utility model provides an expandable pulley device, comprising:

[0005] A stent body, comprising a connecting seat and a plurality of supporting bodies connected to the connecting seat, wherein the plurality of supporting bodies are distributed in a circular shape around the center of the connecting seat, and the plurality of supporting bodies have a contracted state and an expanded state;

[0006] A first telescopic rod, wherein the plurality of the first telescopic rods are all located on the same plane and radially radiate from the connecting seat as the center, wherein one end of any one of the first telescopic rods is connected to the connecting seat, and the other end is connected to one of the supporting bodies, and the plurality of first telescopic rods are extended to drive the plurality of supporting bodies to move from the contracted state to the expanded state along the radial direction at the same time;

[0007] A filling block is seamlessly spliced ​​between two adjacent supporting bodies when the plurality of supporting bodies are in the expanded state.

[0008] In one embodiment of the utility model, it also includes a plurality of second telescopic rods that are all located on the same plane and radially radiate from the center of the bracket body, wherein one end of any one of the second telescopic rods is coaxially connected to the first telescopic rod, and the other end is connected to the support body, and the plurality of first telescopic rods simultaneously drive the plurality of second telescopic rods to move along the radial direction.

[0009] In one embodiment of the present invention, the second telescopic rod is sleeved on the first telescopic rod, and the first telescopic rod and the second telescopic rod are slidably connected via a slide rail.

[0010] In one embodiment of the present invention, a bearing is provided at the center of the bracket body.

[0011] In one embodiment of the utility model, the bearing is provided with an air hole and an air valve, the air hole connects the first telescopic rod and the second telescopic rod, compressed gas is input into the air hole, and the compressed gas drives the first telescopic rod and the second telescopic rod to extend in the radial direction.

[0012] In one embodiment of the utility model, grooves are provided on both sides of the support body, and protrusions are provided on both sides of the filling block corresponding to the grooves. When the filling block is spliced ​​between two adjacent support bodies, the protrusions are inserted into the grooves.

[0013] In one embodiment of the utility model, the protrusion includes a limit block and an elastic element, one end of the elastic element is connected to the filling block, and the other end is connected to the limit block, and the limit block is inserted into the groove.

[0014] In one embodiment of the utility model, the support body is configured as a fan-shaped structure, and when a plurality of the support bodies are in the contracted state, the edges of adjacent fan-shaped structures abut against each other, and the plurality of support bodies are combined into a closed circular ring structure.

[0015] In an embodiment of the present invention, the filling block is made of nylon.

[0016] In an embodiment of the present invention, six first telescopic rods are disposed on the bracket body, and the angles between two adjacent first telescopic rods are equal.

[0017] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0018] The expandable pulley device of the utility model is provided with a plurality of first telescopic rods on a connecting seat, and a plurality of supporting bodies are extended from a contracted state to an expanded state by utilizing the radial telescopic characteristics of the plurality of first telescopic rods, and are spliced ​​between adjacent supporting bodies by using filling blocks. Compared with the contracted state, the radius of the pulley device in the expanded state is greatly increased, the force-bearing area of ​​the continuous pipe and the pulley device is increased, the turning radius of the continuous pipe is increased, and the phenomenon of the continuous pipe jumping out when passing through the pulley device is reduced; the first telescopic rods can also be used to contract the supporting bodies to the contracted state, thereby improving the portability of the pulley device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0020] Figure 1 It is a schematic structural diagram of an expandable pulley device in a preferred embodiment of the utility model.

[0021] Figure 2 for Figure 1 A schematic structural diagram of the expandable pulley device shown in FIG. 1 is a schematic structural diagram of the expandable pulley device in a contracted state.

[0022] Figure 3 for Figure 1 The schematic diagram of the structure of the expandable pulley device shown is in the expanded state.

[0023] Explanation of the reference numerals in the accompanying drawings in the specification: 1. filling block; 2. protrusion; 3. support body; 4. groove; 5. second telescopic rod; 6. first telescopic rod; 7. air valve; 8. bearing; 9. connecting seat. DETAILED DESCRIPTION

[0024] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0025] Example

[0026] Reference Figure 1 , 2 As shown in FIG. 3 , in one embodiment of the present utility model, an expandable pulley device includes:

[0027] A stent body, comprising a connecting seat 9 and a plurality of supporting bodies 3 indirectly connected to the connecting seat 9, wherein the supporting bodies 3 can be arranged to be 3, 4, 5, 6, 7, 8, 9, etc., and the plurality of supporting bodies 3 are evenly distributed in a circle around the center of the connecting seat 9, and the plurality of supporting bodies 3 have a contracted state and an expanded state, wherein the contracted state refers to the position of the plurality of supporting bodies 3 when the pulley device has a minimum diameter, and the expanded state refers to the position of the plurality of supporting bodies 3 after the pulley device has expanded its diameter, and since the diameter of the pulley device is adjustable, one diameter of the pulley device corresponds to one expanded state of the plurality of supporting bodies 3;

[0028] A first telescopic rod 6, wherein the plurality of first telescopic rods 6 are all located on the same plane and radiate radially with the connecting seat 9 as the center, and the angles between two adjacent first telescopic rods 6 are equal, and the number of the first telescopic rods 6 is consistent with the number of the supporting bodies 3, wherein one end of any one of the first telescopic rods 6 is fixedly connected to the connecting seat 9, and the other end is connected to one of the supporting bodies 3, and when it is necessary to expand the diameter of the pulley device, the plurality of first telescopic rods 6 are extended to drive the plurality of supporting bodies 3 to move from the contracted state to the expanded state along the radial direction at the same time, and when it is necessary to reduce the diameter of the pulley device, the plurality of first telescopic rods 6 are contracted to drive the plurality of supporting bodies 3 to move from the expanded state to the contracted state along the radial direction at the same time, and the first telescopic rod 6 can be configured to realize the telescopic function by being driven by its own driver, and can also be configured to realize the telescopic function by an external force;

[0029] A filling block 1, when the plurality of support bodies 3 are in the expanded state, the filling block 1 is seamlessly spliced ​​between two adjacent support bodies 3, and when the support bodies 3 are in the expanded state, there is a gap between the adjacent support bodies 3, and the filling block 1 is used to fill the gap, so that the plurality of support bodies 3 are connected to a complete annular structure. In order to fully contact the conductor, the filling block 1 is provided with a rectangular support surface, and the support surface can also be provided with a groove 4 matching the conductor. The filling block 1 includes a plurality of sizes matching the gaps of different sizes.

[0030] In one embodiment of the present invention, referring to Figure 1 As shown, it also includes a plurality of second telescopic rods 5 that are all located on the same plane and radially radiate from the center of the bracket body, wherein one end of any one of the second telescopic rods 5 is coaxially connected to one end of the first telescopic rod 6, and the other end is connected to the support body 3, and the extension of the plurality of first telescopic rods 6 simultaneously drives the plurality of second telescopic rods 5 to move along the radial direction, and the second telescopic rods 5 are used to further expand the diameter of the pulley device, and the second telescopic rod 5 can be set to realize the telescopic function by being driven by its own driver, and can also be set to realize the telescopic function by an external force.

[0031] In one embodiment of the present invention, referring to Figure 1As shown, the second telescopic rod 5 is coaxially sleeved outside the first telescopic rod 6, and the first telescopic rod 6 and the second telescopic rod 5 are slidably connected via a slide rail.

[0032] In one embodiment of the present invention, referring to Figure 1 As shown, in order to reduce the resistance to the rotation of the pulley device, a bearing 8 is provided at the center of the bracket body.

[0033] In one embodiment of the present invention, referring to Figure 1 As shown, in order to reduce cost and weight, the first telescopic rod 6 and the second telescopic rod 5 are configured to be extended by compressed gas drive, and a sealed cavity is provided inside the first telescopic rod 6 and the second telescopic rod 5, and the bearing 8 is provided with an air hole and an air valve 7, and the air hole is connected to the sealed cavity inside the first telescopic rod 6 and the second telescopic rod 5 through an air passage. After sufficiently strong compressed gas is input into the air hole through the air valve 7, the compressed gas drives the first telescopic rod 6 and the second telescopic rod 5 to extend in the radial direction, tightly supporting the wire, and after the gas is released through the air valve 7, the first telescopic rod 6 and the second telescopic rod 5 are manually retracted.

[0034] In one embodiment of the present invention, referring to Figure 1 As shown, in order to facilitate the splicing of the filling block 1, grooves 4 are provided on both side edges of the support body 3, and protrusions 2 are provided on both sides of the filling block 1 corresponding to the grooves 4. When the filling block 1 is spliced ​​between two adjacent support bodies 3, the protrusions 2 are inserted into the grooves 4 to achieve snap-on connection.

[0035] In one embodiment of the present invention, referring to Figure 1 As shown, in order to quickly splice the filling block 1, the protrusion 2 includes a limit block and an elastic element, one end of the elastic element is connected to the filling block 1, and the other end is connected to the limit block. The elastic element inserts the limit block into the groove 4 through the restoring force, and the elastic element is preferably a spring.

[0036] In one embodiment of the present invention, referring to Figure 2 As shown, the support body 3 is configured as a fan-shaped structure, the central angle of the fan-shaped structure coincides with the center of the connecting seat 9, a rectangular support surface is provided on the top of the fan-shaped structure, the wire abuts on the rectangular support surface, and a groove 4 matching the wire can be provided on the rectangular support surface to prevent the wire from jumping out, and when multiple support bodies 3 are in the contracted state, the edges of adjacent fan-shaped structures are tightly abutted against each other, and multiple support bodies 3 are combined into a closed circular ring structure, at which time the pulley device has the smallest diameter and volume.

[0037] In an embodiment of the present invention, the filling block 1 is made of nylon material, which has the characteristics of good wear resistance, high tensile strength and light weight.

[0038] In one embodiment of the present invention, referring to Figure 2 As shown, six first telescopic rods 6 are provided on the bracket body, and the angles between two adjacent first telescopic rods 6 are equal.

[0039] The working principle of the expandable pulley device of the utility model is:

[0040] After the pulley device is rotated at the bottom and top of the pole tower, compressed gas is filled into the first telescopic rod 6 and the second telescopic rod 5, so that the first telescopic rod 6 and the second telescopic rod 5 extend to drive the support body 3 from the contracted state to the diffused state, and the diameter of the pulley device is expanded until it matches the length of the continuous pipe, and then the filling block 1 is spliced ​​between the adjacent supports 3. After the construction starts, one end of the conductor bypasses the pulley device and abuts against the support surfaces of multiple supports 3 and the filling block 1 to achieve a ninety-degree turn. When the taut conductor moves slowly, the pulley device rotates, and the connecting pipe follows the conductor to move to the pulley device. The conductor abuts against the surface of the support body 3 and the filling block 1 and bends. The connecting pipe fully abuts against the rectangular support surface of the support body 3 and the filling block 1 and slowly turns with the conductor, and finally passes through the pulley device smoothly. After the construction is completed, the filling block 1 is removed and the air valve 7 is opened to release the gas in the first telescopic rod 6 and the second telescopic rod 5. The first telescopic rod 6 and the second telescopic rod 5 are contracted to pull the support body 3 back to the contracted state, or the first telescopic rod 6 and the second telescopic rod 5 are manually contracted.

[0041] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. An expandable pulley device, characterized in that: include, A stent body, comprising a connecting seat and a plurality of supporting bodies connected to the connecting seat, wherein the plurality of supporting bodies are distributed in a circular shape around the center of the connecting seat, and the plurality of supporting bodies have a contracted state and an expanded state; A first telescopic rod, wherein the plurality of the first telescopic rods are all located on the same plane and radially radiate from the connecting seat as the center, wherein one end of any one of the first telescopic rods is connected to the connecting seat, and the other end is connected to one of the supporting bodies, and the plurality of first telescopic rods are extended to drive the plurality of supporting bodies to move from the contracted state to the expanded state along the radial direction at the same time; A filling block is seamlessly spliced ​​between two adjacent supporting bodies when the plurality of supporting bodies are in the expanded state.

2. An expandable pulley device according to claim 1, characterized in that: It also includes a plurality of second telescopic rods that are all located on the same plane and radially radiate from the center of the bracket body, wherein one end of any one of the second telescopic rods is coaxially connected to the first telescopic rod, and the other end is connected to the support body, and the plurality of first telescopic rods simultaneously drive the plurality of second telescopic rods to move along the radial direction.

3. An expandable pulley device according to claim 2, characterized in that: The second telescopic rod is sleeved on the first telescopic rod, and the first telescopic rod is slidably connected to the second telescopic rod via a slide rail.

4. An expandable pulley device according to claim 2, characterized in that: A bearing is arranged at the center of the bracket body.

5. An expandable pulley device according to claim 4, characterized in that: The bearing is provided with an air hole and an air valve, the air hole is connected with the first telescopic rod and the second telescopic rod, compressed gas is input into the air hole, and the compressed gas drives the first telescopic rod and the second telescopic rod to extend in the radial direction.

6. The expandable pulley device according to claim 1, characterized in that: Grooves are arranged on both sides of the support body, and protrusions are arranged on both sides of the filling block corresponding to the grooves. When the filling block is spliced ​​between two adjacent support bodies, the protrusions are inserted into the grooves.

7. An expandable pulley device according to claim 6, characterized in that: The protrusion includes a limit block and an elastic element, one end of the elastic element is connected to the filling block, and the other end is connected to the limit block, and the limit block is inserted into the groove.

8. The expandable pulley device according to claim 1, characterized in that: The support body is configured as a fan-shaped structure, and when the plurality of support bodies are in the contracted state, the edges of adjacent fan-shaped structures abut against each other, and the plurality of support bodies are combined into a closed circular ring structure.

9. The expandable pulley device according to claim 1, characterized in that: The filling block is made of nylon.

10. The expandable pulley device according to claim 1, characterized in that: The bracket body is provided with six first telescopic rods, and the angles between two adjacent first telescopic rods are equal.

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