Auxiliary device for erecting power cable

Abstract

The invention provides an auxiliary device for power cable erection, and belongs to the technical field of cable erection construction.The auxiliary device comprises a cable rack, a take-up and pay-off assembly, a traction rope, an inflatable lifting assembly and an inflation assembly.The side wall of the cable rack is fixedly provided with a cross arm, and the take-up and pay-off assembly is fixedly installed on the cable rack; one end of the traction rope is connected with the winding and unwinding assembly and is controlled by the winding and unwinding assembly to wind and unwind, the other end of the traction rope is connected with the inflatable lifting assembly, the inflatable lifting assembly is movably arranged outside a cable, and the inflatable assembly is located on the ground and used for filling gas with the density smaller than that of air into the inflatable lifting assembly. Compared with the prior art, in the erecting and tightening process of the power cable, the convenience of cable tightening can be improved, meanwhile, the friction resistance between the cable and the cross arm during cable tightening is reduced, and the protection performance of the cable is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of cable installation, in particular to an auxiliary device for installing a power cable. Background Art

[0002] During the installation of power cables, the cable heads are usually passed through the cross arms on the cable racks, and then the cables are tightened with a tensioner so that the cables between the two cable racks are straightened.

[0003] Before the tensioner tightens the cable, the cable between two adjacent cable racks is in a sagging and bending state. Therefore, when the tensioner tightens the cable and causes the cable to move relative to the cross arm, on the one hand, the sagging cable is heavier, resulting in a more difficult cable tightening action. On the other hand, the sagging cable exerts a greater pressure on the cross arm, resulting in a greater frictional resistance when the cable moves, making the cable more susceptible to wear and tear when moving relative to the cross arm. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the embodiments of the present invention is to provide an auxiliary device for installing a power cable.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: An auxiliary device for installing a power cable, comprising a cable rack, a retractable assembly, a traction rope, an inflatable lifting assembly and an inflatable assembly. The side wall of the cable rack is fixedly provided with a cross arm. The retractable assembly is fixedly mounted on the cable rack. One end of the traction rope is connected to the retractable assembly and is controlled by the retractable assembly to be retracted and unreeled, and the other end is connected to the inflatable lifting assembly. The inflatable lifting component is movably arranged outside the cable, and the inflatable component is located on the ground and is used to fill the inflatable lifting component with gas whose density is less than that of air.

[0006] As a further improvement of the present invention: the inflatable lifting assembly includes a balloon storage bag, a first flexible air pipe, a slip ring and a second flexible air pipe, The slip ring is arranged on the outside of the cable, and the end of the traction rope away from the retractable assembly is connected to the slip ring. One end of the first flexible air tube is connected to the slip ring, and the other end is connected to the inner cavity of the balloon. One end of the second flexible air tube is connected to the inflation assembly, and the other end is connected to the first flexible air tube.

[0007] As a further improvement of the present invention: an arc-shaped channel is opened inside the slip ring, the end of the first flexible air tube away from the balloon is connected to the arc-shaped channel, and the end of the second flexible air tube away from the inflation component is connected to the arc-shaped channel.

[0008] As a further improvement of the present invention: a limiting airbag is arranged on the inner wall of the sliding ring, and an air hole is opened on the arc-shaped channel, and the air hole is communicated with the inner cavity of the limiting airbag.

[0009] As a further improvement of the present invention: the slip ring is provided with a notch for the cable to pass through, and a baffle is hingedly provided in the notch. The retractable assembly includes a winding wheel and a handle. The handle is fixedly mounted on one side of the winding wheel, and one end of the traction rope away from the slip ring is wound around the outside of the winding wheel.

[0010] As a further improvement of the present invention: the retractable assembly further includes a U-shaped clamp and a locking bolt. The locking bolt is installed on the side wall of the U-shaped clamp, and the winding wheel is rotatably arranged on the outside of the U-shaped clamp.

[0011] As a further improvement of the present invention: the inflation assembly includes an air storage box and an air pump installed on the side wall of the air storage box, and one end of the second flexible air pipe is connected to the air pump.

[0012] As a further improvement of the present invention: the slip ring is further provided with an air venting pipe, and the air venting pipe is provided with an air venting valve.

[0013] Compared with the prior art, the present invention has the following beneficial effects: In the embodiment of the present invention, during the cable installation process, one end of the cable can be passed through the cross arm on the side wall of one group of cable racks, and then the cable can be tightened with the help of a tensioner, so that the cable between the two groups of cable racks is in a straightened state. When one end of the cable passes through the cross arm, the cable between the two adjacent groups of cable racks is in a drooping and bending state. When the tensioner tightens the cable, the cable itself is heavy, which will make it more difficult for the tensioner to tighten the cable. On the other hand, the pressure applied by the cable to the cross arm is large, which leads to large friction resistance. The cable is more likely to wear when moving than the cross arm, which makes the cable easy to be damaged. Based on this, before the tensioner tightens the cable, the retraction assembly can be used to tighten the traction rope. The unwinding is performed so that the inflatable lifting assembly slides along the outside of the cable to the lowest point. When the inflatable lifting assembly slides to the lowest point, the inflatable assembly on the ground fills the inflatable lifting assembly with gas whose density is lower than that of air. The gas whose density is lower than that of air can automatically float up after entering the inflatable lifting assembly, thereby pulling the lowest point of the cable upward, thereby reducing the pressure applied by the cable to the cross arm, thereby facilitating the tightening of the cable by the tensioner, reducing the wear of the cable during the tightening process, and improving the protection and convenience of the cable during installation. Compared with the existing technology, during the tightening process of power cable installation, the convenience of cable tightening can be improved, and the friction resistance between the cable and the cross arm during tightening can be reduced, thereby improving the protection of the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of an auxiliary device for power cable installation Figure 1 ; Figure 2 A schematic diagram of the structure of an auxiliary device for power cable installation Figure 2 ; Figure 3 for Figure 1 A magnified schematic diagram of the middle A area; Figure 4 for Figure 1 A magnified schematic diagram of the middle B area; In the figure: 10-cable rack, 101-cross arm, 20-retracting and releasing assembly, 201-U-shaped splint, 202-locking bolt, 203-reel, 204-handle, 30-traction rope, 40-inflatable lifting assembly, 401-balloon storage bag, 402-first flexible air pipe, 403-slip ring, 4031-arc channel, 4032-air hole, 4033-limiting air bag, 4034-blocking piece, 404-second flexible air pipe. DETAILED DESCRIPTION

[0015] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0016] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] See also Figure 1 as well as Figure 2 The present embodiment provides an auxiliary device for installing a power cable, including a cable rack 10, a retractable assembly 20, a traction rope 30, an inflatable lifting assembly 40 and an inflatable assembly (not shown in the figure). The side wall of the cable rack 10 is fixedly provided with a cross arm 101, the retractable assembly 20 is fixedly installed on the cable rack 10, one end of the traction rope 30 is connected to the retractable assembly 30 and is controlled by the retractable assembly 20 to be retracted and unreeled, and the other end is connected to the inflatable lifting assembly 40. The inflatable lifting assembly 40 is movably arranged outside the cable, and the inflatable assembly is located on the ground, and is used to fill the inflatable lifting assembly 40 with a gas with a density less than that of air.

[0018] During the cable installation process, one end of the cable can be passed through the cross arm 101 on the side wall of one group of cable racks 10, and then the cable can be tightened with the help of a tensioner, so that the cable between the two groups of cable racks 10 is in a straightened state. When one end of the cable passes through the cross arm 101, the cable between the two adjacent groups of cable racks 10 is in a drooping and bending state. When the tensioner tightens the cable, the cable itself is heavy, which makes it more difficult for the tensioner to tighten the cable. On the other hand, the pressure applied by the cable to the cross arm 101 is large, resulting in large friction resistance. The cable is more prone to wear when moving than the cross arm 101, which makes the cable easy to be damaged. Based on this, before the tensioner tightens the cable, the retractable assembly 20 can be used to unwind the traction rope 30, so that the inflatable lifting assembly 40 slides along the outside of the cable to the lowest point (such as Figure 1 as well as Figure 2 As shown), when the inflatable lifting assembly 40 slides to the lowest point, the inflatable assembly on the ground fills the inflatable lifting assembly 40 with gas whose density is lower than that of air. The gas whose density is lower than that of air can automatically float up after entering the inflatable lifting assembly 40, thereby pulling the lowest point of the cable upward, so that the pressure applied by the cable to the cross arm 101 is reduced, thereby facilitating the tightening of the cable by the tensioner, and at the same time reducing the wear of the cable during the tightening process, thereby improving the protection and convenience of the cable during the installation process.

[0019] See also Figure 1In one embodiment, the inflatable lifting assembly 40 includes a ball storage balloon 401, a first flexible air tube 402, a slip ring 403 and a second flexible air tube 404. The slip ring 403 is sleeved on the outside of the cable, and the end of the traction rope 30 away from the retractable assembly 20 is connected to the slip ring 403. One end of the first flexible air tube 402 is connected to the slip ring 403, and the other end is connected to the inner cavity of the ball storage balloon 401. One end of the second flexible air tube 404 is connected to the inflatable assembly, and the other end is connected to the first flexible air tube 402.

[0020] Initially, the air storage balloon 401 is in a deflated state. When one end of the cable passes through the crosswalk 101, the retracting assembly 20 unwinds the traction rope 30, and the slip ring 403 slides to the lowest point along the outside of the drooping and curved cable. Then the inflation assembly fills the air with a density less than that of air into the air storage balloon 401 through the second flexible air tube 404 and the first flexible air tube 402, thereby driving the air storage balloon 401 to expand. When the air storage balloon 401 expands, it can provide an upward pulling force to the cable with the help of air buoyancy, and then pull the cable upward through the first flexible air tube 402 and the slip ring 403. When the cable moves upward, on the one hand, the weight is reduced, so that the tensioner can tighten the cable smoothly. On the other hand, the pressure applied by the cable to the cross arm 101 is reduced, thereby reducing the friction resistance when the cable is tightened. In the process of the drooping and curved cable being moved upward, the tensioner simultaneously tightens the cable.

[0021] See also Figure 3 In one embodiment, an arc-shaped channel 4031 is opened inside the slip ring 403, and the end of the first flexible air tube 402 away from the balloon 401 is connected to the arc-shaped channel 4031, and the end of the second flexible air tube 404 away from the inflatable component is connected to the arc-shaped channel 4031.

[0022] After the slip ring 403 slides to the lowest point along the outside of the drooping and curved cable, the inflation component fills the gas with a density less than that of air into the interior of the arc channel 4031 through the second flexible air tube 404, and then enters the interior of the first flexible air tube 402 from the interior of the arc channel 4031, and finally enters the interior of the ball storage balloon 401 from the first flexible air tube 402, thereby driving the ball storage balloon 401 to expand and pull the curved cable upward.

[0023] See also Figure 3 In one embodiment, a limiting airbag 4033 is disposed on the inner wall of the slip ring 403 , and an air hole 4032 is opened on the arc channel 4031 , and the air hole 4032 is communicated with the inner cavity of the limiting airbag 4033 .

[0024] When the inflation component fills the gas with density less than that of air into the arc channel 4031 through the second flexible air tube 404, the gas enters the air storage balloon 401 through the first flexible air tube 402 on the one hand to drive the air storage balloon 401 to expand, and on the other hand, the gas can also enter the limiting air bag 4033 through the air hole 4032, thereby driving the limiting air bag 4033 to expand. When the limiting air bag 4033 expands, the cable on the inside of the slip ring 403 is tightened to achieve the limitation between the slip ring 403 and the cable. In this way, when the air storage balloon 401 floats, the slip ring 403 can be prevented from sliding randomly along the length direction of the cable, thereby ensuring that the cable can be smoothly pulled upward.

[0025] See also Figure 3 as well as Figure 4 In one embodiment, the slip ring 403 is provided with a gap for the cable to pass through, and a baffle 4034 is hingedly provided in the gap. The retractable assembly 20 includes a winding wheel 203 and a handle 204, and the handle 204 is fixedly mounted on one side of the winding wheel 203. The end of the traction rope 30 away from the slip ring 403 is wound around the outside of the winding wheel 203.

[0026] When one end of the cable passes through the crosswalk 101, the staff can rotate the handle 204, and the handle 204 drives the winding wheel 203 to rotate, thereby unwinding the traction rope 30. When the traction rope 30 is unwinding, the slip ring 403 slides to the lowest point along the outside of the drooping and curved cable; when the cable is tightened, the staff rotates the handle 204 in the opposite direction, thereby driving the winding wheel 203 to rotate in the opposite direction to reel in the traction rope 30. When the traction rope 30 is reeled in, the slip ring 403 is pulled so that the slip ring 403 slides along the outside of the cable toward the cable rack 10, and then the staff presses the baffle 4034 toward the inside of the slip ring 403, and the baffle 4034 rotates toward the inside of the slip ring 403 to open the gap, and then the staff moves the cable from the opened gap to the outside of the slip ring 403, thereby removing the slip ring 403 from the cable.

[0027] See also Figure 4 In one embodiment, the retractable assembly 20 further includes a U-shaped clamp 201 and a locking bolt 202 , wherein the locking bolt 202 is mounted on a side wall of the U-shaped clamp 201 , and the winding wheel 203 is rotatably disposed on the outer side of the U-shaped clamp 201 .

[0028] By clamping the U-shaped clamp 201 on the outside of the cable rack 10, and then tightening the locking bolt 202, the locking bolt 202 is used to support the side wall of the cable rack 10 to fix the U-shaped clamp 201 and the cable rack 10 as a whole, the positioning support of the winding wheel 203 is achieved, thereby facilitating the rotation operation of the winding wheel 203.

[0029] In one embodiment, the gas with a density less than that of air may be hydrogen or helium, which is not limited here.

[0030] In one embodiment, the inflation assembly includes an air storage box and an air pump installed on a side wall of the air storage box, and one end of the second flexible air tube 402 is connected to the air pump.

[0031] When the slip ring 403 slides to the lowest point along the outside of the drooping and curved cable, the staff starts the air pump, which pumps the gas with a density lower than that of air stored in the air storage box into the arc channel 4031 through the second flexible air pipe 402, and then enters the air storage balloon 401 through the first flexible air pipe 402, so that the air storage balloon 401 expands and pulls the cable to move upward.

[0032] In one embodiment, the slip ring 403 is further provided with an air vent (not shown in the figure), and the air vent pipe is provided with an air vent valve. After the slip ring 403 is removed from the cable, the staff can twist the air vent valve to open the air vent pipe. After the air vent pipe is opened, the gas in the air storage balloon 401 and the limiting air bag 4033 is released through the air vent pipe, so that the air storage balloon 401 and the limiting air bag 4033 are in a deflated state again.

[0033] In the embodiment of the present invention, during the cable installation process, one end of the cable can be passed through the cross arm 101 on the side wall of one group of cable racks 10, and then the cable can be tightened with the help of a tensioner, so that the cable between the two groups of cable racks 10 is in a straightened state. When one end of the cable passes through the cross arm 101, the cable between the two adjacent groups of cable racks 10 is in a drooping and bending state. When the tensioner tightens the cable, the cable itself is heavy, which will make it more difficult for the tensioner to tighten the cable. On the other hand, the pressure applied by the cable to the cross arm 101 is large, resulting in large friction resistance. The cable is more prone to wear when moving than the cross arm 101, which makes the cable easy to be damaged. Based on this, before the tensioner tightens the cable, the retractable assembly 20 can be used to unwind the traction rope 30, so that the inflatable lifting assembly 40 slides along the outside of the cable to the lowest point (such as Figure 1 as well as Figure 2As shown), when the inflatable lifting component 40 slides to the lowest point, the inflatable component on the ground fills the inflatable lifting component 40 with gas whose density is less than that of air. The gas whose density is less than that of air can automatically float after entering the inflatable lifting component 40, thereby pulling the lowest point of the cable upward, so that the pressure applied by the cable to the cross arm 101 is reduced, thereby facilitating the tightening of the cable by the tensioner, and reducing the wear of the cable during the tightening process, thereby improving the protection and convenience of the cable during the installation process. Compared with the prior art, during the tightening process of the power cable, the convenience of cable tightening can be improved, and the friction resistance between the cable and the cross arm 101 during tightening can be reduced, thereby improving the protection of the cable.

[0034] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention, and any reference numerals in the claims should not be regarded as limiting the claims involved.

[0035] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An auxiliary device for installing a power cable, characterized in that: It includes cable rack, retractable assembly, traction rope, inflatable lifting assembly and inflatable assembly. The side wall of the cable rack is fixedly provided with a cross arm. The retractable assembly is fixedly mounted on the cable rack. One end of the traction rope is connected to the retractable assembly and is controlled by the retractable assembly to be retracted and unreeled, and the other end is connected to the inflatable lifting assembly. The inflatable lifting component is movably arranged outside the cable, and the inflatable component is located on the ground and is used to fill the inflatable lifting component with gas whose density is less than that of air.

2. The auxiliary device for installing a power cable according to claim 1, characterized in that: The inflatable lifting assembly includes a gas storage balloon, a first flexible air tube, a slip ring and a second flexible air tube. The slip ring is arranged on the outside of the cable, and the end of the traction rope away from the retractable assembly is connected to the slip ring. One end of the first flexible air tube is connected to the slip ring, and the other end is connected to the inner cavity of the balloon. One end of the second flexible air tube is connected to the inflation assembly, and the other end is connected to the first flexible air tube.

3. The auxiliary device for installing a power cable according to claim 2, characterized in that: An arc-shaped channel is provided inside the slip ring, one end of the first flexible air tube away from the balloon is communicated with the arc-shaped channel, and one end of the second flexible air tube away from the inflation assembly is communicated with the arc-shaped channel.

4. The auxiliary device for installing a power cable according to claim 2, characterized in that: The inner wall of the sliding ring is provided with a limiting air bag, and the arc-shaped channel is provided with an air hole, and the air hole is communicated with the inner cavity of the limiting air bag.

5. The auxiliary device for installing a power cable according to claim 2, characterized in that: The slip ring is provided with a notch through which the cable can pass, and a blocking piece is hingedly provided in the notch. The retractable assembly includes a winding wheel and a handle. The handle is fixedly mounted on one side of the winding wheel, and one end of the traction rope away from the slip ring is wound around the outside of the winding wheel.

6. The auxiliary device for installing a power cable according to claim 5, characterized in that: The retractable assembly also includes a U-shaped clamp and a locking bolt. The locking bolt is installed on the side wall of the U-shaped clamp, and the winding wheel is rotatably arranged on the outside of the U-shaped clamp.

7. The auxiliary device for installing a power cable according to claim 4, characterized in that: The inflation assembly comprises an air storage box and an air pump installed on the side wall of the air storage box, and one end of the second flexible air pipe is connected to the air pump.

8. The auxiliary device for installing a power cable according to claim 7, characterized in that: The slip ring is also provided with an air release pipe, and the air release pipe is provided with an air release valve.

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