An overhead line insulator tightening device and method

Abstract

The present application belongs to the technical field of power equipment, and relates to an overhead line insulator tight line device and method. The present application is mechanically locked with the hoop clamp plate and the side groove of the insulator, replacing the traditional aluminum wire winding. During installation, only the clamp plate needs to be buckled and the limiting part needs to be tightened, which greatly improves the installation efficiency and makes the quality uniform, beautiful and neat. The mechanical locking structure is not affected by environmental corrosion, and the double locking of the first and second locking limiting parts ensures that it does not loosen during long-term use, significantly improves the stability, and reduces the maintenance cost. Two wire pressing connecting rods connect each component into a pre-assembled whole, solving the problem of loose parts being easily lost, especially suitable for high-altitude operation environment. The present application can finely adjust the tight line pressure of the cable by driving the adjusting block in the limiting groove through the tight line screw rod, which is suitable for cables of different diameters, further improving the applicability and practicality of the device.

Description

Technical Field

[0001] This invention belongs to the field of power equipment technology and relates to a tensioning device and method for overhead line insulators. Background Technology

[0002] Post-type insulators are commonly used to fix high-voltage cables. Traditionally, the cable is tightly attached to the top or side slot of the post-type insulator, and then the cable is bound to the pin-type insulator with cable ties. Although this binding installation method is low in cost, it still has the following technical problems in practical applications: 1. It requires wrapping aluminum wire around the insulator multiple times for binding, resulting in inconsistent installation processes that are unsightly, time-consuming, labor-intensive, and inefficient. 2. Aluminum wires are susceptible to corrosion and other adverse reactions when subjected to long-term external environmental influences, resulting in a decline in structural performance. This causes the conductors to gradually loosen on the insulators, affecting installation stability and making maintenance cumbersome. 3. During installation, the conductors may be damaged by the binding effect of the aluminum wires, which can cause marks on the conductors, accelerate the aging process, increase conductor resistance and temperature rise, affect circuit safety, and cause the insulated cable to come into direct contact with the metal wires, posing a risk of leakage.

[0003] Currently, there are also technologies that have improved the traditional cable fixing method by using a wire fixing mechanism to fix the cable to the insulator. However, the existing wire fixing mechanism has relatively loose parts, which has disadvantages such as easy loss of parts and complicated installation and disassembly. Summary of the Invention

[0004] The purpose of this invention is to provide a tensioning device and method for overhead line insulators, in order to solve the technical problems of low installation efficiency, poor stability, and easy damage to conductors in the cable fixing method of post insulators, as well as the loose and easily lost parts of the cable fixing mechanism when fixing the cable to the insulator.

[0005] To achieve the above objectives, the present invention employs the following technical solution: In a first aspect, the present invention discloses an overhead line insulator tensioning device, comprising: Wire clamping plate; The adjusting block has a pressure groove, and the pressure plate has a limit groove, with the adjusting block located in the limit groove; A tensioning screw is threaded through the pressure plate and connected to the pressure plate; the tensioning screw is rotatably connected to the adjusting block. Two clamping plates are connected end to end in a ring structure; Two wire-pressing connecting rods, one end of which is connected to the wire-pressing plate, and the other end of which is connected to the joint of the two clamping plates; The first locking and limiting part is arranged on the clamp plate and located on the side of the clamp plate away from the pressure plate. The first locking and limiting part is used to lock and limit the axial movement of the pressure connecting rod. The second locking and limiting part is fixedly connected to the pressure line connecting rod and is located on the side of the pressure line plate away from the adjusting block.

[0006] Furthermore, the tensioning screw is provided with a ball head, which is movably embedded in the adjusting block.

[0007] Furthermore, the two clamping plates are a first clamping plate and a second clamping plate, each having a first end and a second end. The first end of both the first clamping plate and the second clamping plate is provided with a slot. The second end of the first clamping plate is embedded in the slot of the second clamping plate, and the second end of the second clamping plate is embedded in the slot of the first clamping plate. The first clamping plate and the second clamping plate form a circular ring structure.

[0008] Furthermore, the two pressure wire connecting rods are respectively the first pressure wire rod and the second pressure wire rod; The first pressure bar passes through the first end of the first clamping plate and the second end of the second clamping plate, and the second pressure bar passes through the second end of the first clamping plate and the first end of the second clamping plate; The first locking limiting part consists of two parts, namely a first locking nut and a second locking nut; the first locking nut is sleeved on the first pressure bar and is threadedly connected to the first pressure bar, and is fixedly connected to the first end of the first clamping plate, with the first locking nut located on the side of the first clamping plate away from the pressure bar; the second locking nut is sleeved on the second pressure bar and is threadedly connected to the second pressure bar, and is fixedly connected to the first end of the second clamping plate, with the second locking nut located on the side of the second clamping plate away from the pressure bar; The second locking limiting part consists of two parts, namely a first clamping nut and a second clamping nut; the first clamping nut is fixedly connected to the first pressure rod, and the second clamping nut is fixedly connected to the second pressure rod. Both the first clamping nut and the second clamping nut are located on the side of the pressure plate away from the adjusting block.

[0009] Furthermore, both the first clamping plate and the second clamping plate are provided with a thickened structure so that after the first clamping plate and the second clamping plate are connected, the upper and lower surfaces are respectively on the same plane; The first clamp and the second clamp are the same in shape and size.

[0010] Furthermore, both the first clamping plate and the second clamping plate are provided with rubber pads, which are located inside the circular annular structure and are used to fill the gap between the circular annular structure and the porcelain insulator clip.

[0011] Furthermore, the surfaces of the pressure plate and the clamping plate are both covered with an insulating outer layer.

[0012] Furthermore, the limiting groove is a rectangular groove or the cross-section of the limiting groove is arc-shaped, and the adjusting block follows the shape of the limiting groove.

[0013] Furthermore, the pressure groove is provided with several protruding ridges.

[0014] Secondly, the present invention discloses a method for tightening insulators on overhead lines, based on an overhead line insulator tightening device. The device is in a pre-assembled state before installation, wherein two of the wire-pressing connecting rods have passed through both ends of the wire-pressing plate, and one of the wire-pressing connecting rods has passed through a joint between two clamping plates to form a hinge. The method includes the following steps: Place the cable on the top groove of the insulator, place the pressure plate above the cable so that the cable is below the pressure groove, and rotate the two clamping plates around the hinged pressure connecting rod as an axis so that the two clamping plates are respectively located on both sides of the insulator. The two clamping plates are rotated relative to each other so that they are connected end to end to form a ring structure, which clamps the side groove of the insulator. The other wire-pressing connecting rod is passed sequentially through the second locking limiting part, the other end of the two clamping plates, and the first locking limiting part. Through the first locking limiting part and the second locking limiting part, the wire-pressing plate is moved towards the clamping plate to press the cable between the top groove and the wire-pressing groove of the insulator. Rotating the tensioning screw drives the adjusting block to move within the limiting groove, further adjusting the tensioning pressure on the cable.

[0015] Compared with the prior art, the present invention has the following beneficial effects: This invention replaces traditional aluminum wire winding with a mechanical locking mechanism between the clamping plate and the insulator side groove. Installation is simple: just fasten the clamping plate and tighten the limiting part, significantly improving installation efficiency and ensuring uniform quality and a neat appearance. The mechanical locking structure is unaffected by environmental corrosion, and the double locking mechanism with the first and second locking limiting parts ensures long-term stability and reduces maintenance costs. Two wire-pressing connecting rods connect the components into a pre-assembled whole, solving the problem of loose and easily lost parts, making it particularly suitable for high-altitude work environments. This invention uses a tensioning screw to drive the adjusting block to move within the limiting groove, allowing for precise adjustment of the cable tension. During use, the adjusting block with the appropriate wire-pressing groove size is selected according to the cable diameter, further improving the applicability and practicality of the device.

[0016] This invention's method achieves fixation through the clamping and locking of the clamping plates, completely eliminating the cumbersome traditional aluminum wire winding process. The installation steps are simple and clear, significantly improving construction efficiency. The mechanical locking and double-limiting structure ensures a tight fit between the clamping plates and the insulator side slots, preventing loosening even after long-term use. This solves the technical problems of traditional aluminum wires being prone to corrosion and loosening, requiring frequent maintenance, and significantly reducing operation and maintenance costs. The cable is pressed by the pressure groove of the adjusting block, and the tightening pressure can be finely adjusted to prevent damage to the conductor due to localized stress concentration. Based on a pre-assembled device, there is no need to assemble scattered parts on-site during installation, fundamentally solving the problem of easily lost parts in existing wire fixing mechanisms. This is particularly suitable for high-altitude field operations, improving operational safety and convenience. If slight loosening occurs after long-term use, the device does not need to be disassembled; simply rotating the tightening screw will re-tighten the cable, making maintenance convenient. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the assembly of the pressure plate and the adjustment block according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first and second clamping plates according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the connection between the tensioning screw and the adjusting block in an embodiment of the present invention; Figure 5 This is a flowchart of a method according to an embodiment of the present invention.

[0018] The components are as follows: 1. Pressure plate; 11. Limiting groove; 2. Clamping assembly; 3. Pressure connecting rod; 31. First pressure rod; 32. Second pressure rod; 4. Tightening screw; 41. Ball head; 5. Clamping plate; 51. First clamping plate; 52. Second clamping plate; 53. Slot; 54. First end; 55. Second end; 6. First locking limiting part; 61. First locking nut; 62. Second locking nut; 7. Second locking limiting part; 71. First clamping nut; 72. Second clamping nut; 8. Adjusting block; 9. Pressure groove; 10. Protruding ridge. Detailed Implementation

[0019] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0020] It should be noted that the terms "first," "second," etc., in the specification and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings: Example 1: See Figure 1 The present invention discloses an overhead line insulator tensioning device, comprising: a pressure plate 1, an adjusting block 8, a tensioning screw 4, two clamping plates 5, two pressure connecting rods 3, a first locking limiting part 6, and a second locking limiting part 7.

[0022] The pressure plate 1 serves as the main load-bearing structure of the device.

[0023] The pressure plate 1 has a limiting groove 11, and the adjusting block 8 is located in the limiting groove 11 for directly pressing the cable.

[0024] In a preferred embodiment of the present invention, the adjusting block 8 is provided with a wire pressing groove 9. In use, the adjusting block with the corresponding size wire pressing groove is selected according to the cable with different wire diameters to adapt to cables with different wire diameters, thereby further improving the applicability and practicality of the device.

[0025] The wire pressing groove 9 is provided with several protruding ridges 10. The adjusting block 8 contacts the cable surface through the wire pressing groove 9 to eliminate the damage caused by the binding of aluminum wires.

[0026] The tensioning screw 4 passes through the pressure plate 1 and is threadedly connected to the pressure plate 1. The tensioning screw 4 is rotatably connected to the adjusting block 8. By rotating the tensioning screw 4, the adjusting block 8 is driven to move within the limiting groove 11, which can finely adjust the tensioning pressure of the cable to adapt to cables of different diameters, further improving the applicability and practicality of the device.

[0027] The two clamping plates 5 are connected end to end in a ring structure, which is used to hold and fix them to the side slots of the insulator.

[0028] One end of the wire clamping rod 3 is connected to the wire clamping plate 1, and the other end is connected to the joint of the two clamping plates 5. This invention uses the clamping plates 5 to mechanically lock with the insulator side groove, replacing the traditional aluminum wire winding method. During installation, only the clamps need to be fastened and the limiting part tightened, significantly improving installation efficiency and resulting in uniform quality and a neat appearance. The two wire clamping rods 3 connect the components into a pre-assembled whole, solving the problem of loose and easily lost parts, making it particularly suitable for high-altitude work environments.

[0029] The first locking and limiting part 6 is arranged on the clamping plate 5 and located on the side of the clamping plate 5 away from the pressure plate 1. The first locking and limiting part 6 is used to lock and limit the axial movement of the pressure connecting rod 3.

[0030] The second locking and limiting part 7 is fixedly connected to the pressure line connecting rod 3 and is located on the side of the pressure line plate 1 away from the adjusting block 8, and is used to drive the pressure line plate 1 to move towards the clamping plate 5.

[0031] The mechanical locking structure is unaffected by environmental corrosion. With the double locking of the first locking limit part 6 and the second locking limit part 7, it ensures that it will not loosen during long-term use, significantly improving stability and reducing maintenance costs.

[0032] See Figure 1 In a preferred embodiment of the present invention, the cross-section of the limiting groove 11 is arc-shaped and the adjusting block 8 follows the shape of the limiting groove 11.

[0033] See Figure 4In a preferred embodiment of the present invention, the tensioning screw 4 is provided with a ball head 41, which is movably embedded in the adjusting block 8, ensuring that the tensioning screw 4 can rotate relative to the adjusting block 8. Simultaneously, when the tensioning screw 4 rotates on the pressure plate 1, due to the threaded connection between the two, the tensioning screw 4 can move up and down, thereby driving the adjusting block 8 to move within the limiting groove 11, allowing for fine adjustment of the cable tensioning pressure. This ensures that the adjusting block 8, the tensioning screw 4, and the pressure plate 1 are integrally connected, solving the problem of loose parts being easily lost, and is suitable for high-altitude working environments.

[0034] See Figure 1 and Figure 3 In a preferred embodiment of the present invention, the two clamping plates 5 are a first clamping plate 51 and a second clamping plate 52, both the first clamping plate 51 and the second clamping plate 52 have a first end 54 and a second end 55, and both the first end 54 of the first clamping plate 51 and the second clamping plate 52 have a slot 53, the second end 55 of the first clamping plate 51 is embedded in the slot 53 of the second clamping plate 52, and the second end 55 of the second clamping plate 52 is embedded in the slot 53 of the first clamping plate 51, forming a circular ring structure.

[0035] In a preferred embodiment of the present invention, both the first clamping plate 51 and the second clamping plate 52 are provided with a thickened structure so that after the first clamping plate 51 and the second clamping plate 52 are connected, their upper and lower surfaces are respectively on the same plane. The first clamping plate 51 and the second clamping plate 52 have the same shape and size.

[0036] In a preferred embodiment of the present invention, both the first clamping plate 51 and the second clamping plate 52 are provided with rubber pads, which are located inside the circular annular structure and are used to fill the gap between the circular annular structure and the porcelain insulator clip.

[0037] In a preferred embodiment of the present invention, the two wire pressing connecting rods 3 are respectively the first wire pressing rod 31 and the second wire pressing rod 32.

[0038] The first pressure bar 31 passes through the first end 54 of the first clamping plate 51 and the second end 55 of the second clamping plate 52, and the second pressure bar 32 passes through the second end 55 of the first clamping plate 51 and the first end 54 of the second clamping plate 52.

[0039] The first locking limiting part 6 consists of two parts, namely a first locking nut 61 and a second locking nut 62. The first locking nut 61 is sleeved on the first pressure rod 31 and is threadedly connected to the first pressure rod 31. The first locking nut 61 is fixedly connected to the first end 54 of the first clamping plate 51, and the first locking nut 61 is located on the side of the first clamping plate 51 away from the pressure plate 1. The second locking nut 62 is sleeved on the second pressure rod 32 and is threadedly connected to the second pressure rod 32. The second locking nut 62 is fixedly connected to the first end 54 of the second clamping plate 52, and the second locking nut 62 is located on the side of the second clamping plate 52 away from the pressure plate 1. The second locking limiting part 7 consists of two parts, namely a first clamping nut 71 and a second clamping nut 72; the first clamping nut 71 is fixedly connected to the first pressure rod 31, and the second clamping nut 72 is fixedly connected to the second pressure rod 32. The first clamping nut 71 and the second clamping nut 72 are both located on the side of the pressure plate 1 away from the adjusting block 8.

[0040] In a preferred embodiment of the present invention, the surfaces of the pressure plate 1 and the clamping plate 5 are both covered with an insulating outer layer, which can eliminate the risk of leakage and effectively ensure the safety of the conductor.

[0041] See Figure 5 Based on the above-mentioned device, the present invention also discloses a method for tightening insulators on overhead lines. The device is in a pre-assembled state before installation, wherein two of the wire-pressing connecting rods 3 have passed through both ends of the wire-pressing plate 1, and one of the wire-pressing connecting rods 3 has passed through a connection point of the two clamping plates 5 to form a hinge. The method includes the following steps: S1: Place the cable on the top groove of the insulator, place the pressure plate 1 above the cable, so that the cable is below the pressure groove 9, and rotate the two clamping plates 5 around the hinged pressure connecting rod 3, so that the two clamping plates 5 are respectively located on both sides of the insulator. Utilizing the pre-assembled hinged structure, the entire device can be erected on the insulator and cable in one operation, reducing the difficulty of high-altitude operations.

[0042] S2: Rotate the two clamping plates 5 relative to each other, so that the two clamping plates 5 are connected end to end to form a ring structure, which clamps the side groove of the insulator. The ring structure forms a mechanical lock with the side groove of the insulator, which replaces the friction fixation of the traditional aluminum wire, resulting in high connection strength and good reliability.

[0043] S3: Pass the other wire-pressing connecting rod 3 through the second locking limiting part 7, the other end of the two clamping plates 5 and the first locking limiting part 6 in sequence, and through the first locking limiting part 6 and the second locking limiting part 7, move the wire-pressing plate 1 toward the clamping plate 5 to press the cable between the top groove of the insulator and the wire-pressing groove 9.

[0044] S4: Rotate the tensioning screw 4 to drive the adjusting block 8 to move within the limiting groove 11, further adjusting the tensioning pressure on the cable. The pressure plate 1 drives the adjusting block 8 to press the cable into the top groove of the insulator, forming a large-area contact and eliminating the marks and damage caused by traditional line contact. If slight loosening occurs after long-term use, there is no need to disassemble the device; simply rotate the tensioning screw to re-tighten it, making maintenance convenient.

[0045] Example 2: See Figure 1 This invention discloses a tensioning device for insulators of overhead lines. Unlike embodiment 1, the limiting groove 11 in this embodiment is a rectangular groove and the adjusting block 8 follows the shape of the limiting groove 11, which helps to ensure the stability of the adjustment of the adjusting block 8.

[0046] Example 3: See Figures 1 to 4 This embodiment discloses a 10kV overhead line insulator tensioning device, such as... Figure 1 As shown, the assembly includes a wire clamping plate 1, a clamping assembly 2, a first wire clamping rod 31, and a second wire clamping rod 32. The wire clamping plate 1 has a tensioning screw 4 in the middle, and each end of the wire clamping plate 1 has a hole with a diameter equal to the diameter of the first wire clamping rod 31 and the second wire clamping rod 32. The first wire clamping rod 31 and the second wire clamping rod 32 pass through the holes at both ends of the wire clamping plate 1 and are connected to both ends of the wire clamping plate 1. The clamping assembly 2 includes a first clamping plate 51, a second clamping plate 52, a first locking nut 61, and a second locking nut 62. The first clamping plate 51... Each of the first clamping plate 51 and the second clamping plate 52 has a slot 53 at one end. One end of the first clamping plate 51 and the second clamping plate 52 is hinged by the first pressure rod 31. On the side that is hinged by the first pressure rod 31, the end of the second clamping plate 52 is placed in the slot 53 of the first clamping plate 51. The other end of the first clamping plate 51 and the second clamping plate 52 is connected by the second pressure rod 32. On the side that is connected by the second pressure rod 32, the end of the first clamping plate 51 is placed in the slot 53 of the second clamping plate 52.

[0047] The bottom end of the first pressure rod 31 is detachably connected to the clamp assembly 2, and the bottom end of the second pressure rod 32 is detachably connected to the clamp assembly 2.

[0048] The first clamp 51 and the second clamp 52 are the same in shape and size. The mating ends of the first clamp 51 and the second clamp 52 are both formed into a half-circular bayonet structure. A rubber pad for fastening connection is respectively attached to the inner wall of the bayonet structure. After the clamp assembly 2 is mated, a clamp is formed inside that locks with the porcelain insulator buckle.

[0049] The first clamping plate 51 and the second clamping plate 52 are respectively provided with a first locking nut 61 and a second locking nut 62 below them, and the locking nuts are fixed to the clamping plates as one piece.

[0050] Both the first pressure rod 31 and the second pressure rod 32 are screw rods. The screw rods are respectively provided with a first clamping nut 71 and a second clamping nut 72. The clamping nut and the screw rod are fixed together. By tightening the second clamping nut 72 and cooperating with the second locking nut 62 below the second clamping plate 52, the pressure plate 1 can move toward the clamping assembly 2, thereby pressing the cable onto the top groove of the pin insulator.

[0051] like Figure 2 As shown, an adjusting block 8 is provided in the middle of the lower end face of the pressure plate 1. The upper end face of the adjusting block 8 conforms to the lower end face of the pressure plate 1. The lower end face of the adjusting block 8 is provided with an upwardly recessed pressure groove 9. The surface of the pressure groove 9 is provided with multiple convex ridges 10 with equal spacing to increase friction resistance.

[0052] The upper end of the adjusting block 8 is provided with a spherical hole extending vertically. The tensioning screw 4 passes through the pressure plate 1 and is connected to the pressure plate 1 by a thread. The lower end of the tensioning screw 4 is provided with a ball head 41, which is embedded in the spherical hole of the adjusting block 8. The adjusting block 8 is moved up and down by adjusting the tensioning screw 4 to tighten or loosen the cable.

[0053] The surfaces of the wire clamping plate 1, the first clamping plate 51, and the second clamping plate 52 are all covered with an insulating outer layer.

[0054] The first clamping plate 51 and the second clamping plate 52 are equipped with a thickened structure and have the same thickness, so that after the first clamping plate 51 and the second clamping plate 52 are connected, their upper surfaces are flush and their lower surfaces are flush.

[0055] like Figure 3 As shown, the upper and lower surfaces of the connection port at one end of the first clamping plate 51 and the second clamping plate 52 are slightly higher than the thickness of the clamping plate, and a slot 53 is provided in the middle of the port. The connection port at the other end is the same as the thickness of the clamping plate, and the two ports of the first clamping plate 51 and the second clamping plate 52 are tightly connected to each other.

[0056] Before installation, the first pressure rod 31 and the second pressure rod 32 can be assembled on both ends of the pressure plate 1. At this time, although the entire 10kV overhead line insulator tensioning device can move, it is also a connected integrated structure.

[0057] See Figure 5 During installation, the cable is placed in the top groove of the pin insulator.

[0058] Step 1: Rotate the first clamping plate 51 counterclockwise and the second clamping plate 52 clockwise around the first clamping rod 31 as the axis, so that the 10kV overhead line insulator tensioning device presses the clamping plate 1 onto the cable from top to bottom.

[0059] Step 2: Rotate the first clamping plate 51 clockwise and the second clamping plate 52 counterclockwise around the first clamping rod 31, so that the clamping assembly 2 is embedded in the annular side groove of the pin insulator, and the other end of the first clamping plate 51 is embedded in the middle of the other end of the second clamping plate 52.

[0060] Step 3: Pass the second pressure rod 32 through the other end of the first clamping plate 51 and the second clamping plate 52, and tighten the second clamping nut 72 downwards. This will cooperate with the second locking nut 62 below the second clamping plate 52, causing the pressure plate 1 to move toward the clamping assembly 2 and press the cable onto the top groove of the pin insulator.

[0061] Step 4: Adjust the tensioning screw 4 to move the adjusting block 8 up and down, thereby adjusting the tensioning pressure on the cable located at the top groove of the insulator, further stabilizing the cable.

[0062] The upper end face of the adjusting block 8 conforms to the lower end face of the pressure plate 1, allowing the adjusting block 8 to be inserted into the top groove to clamp small-diameter cables, thereby increasing the range of applicable cable diameters.

[0063] The inner circumferential surfaces of the first clamping plate 51 and the second clamping plate 52 are provided with a filling layer. When the first clamping plate 51 and the second clamping plate 52 abut against the side groove of the pin insulator, the filling layer can fill the gap between the first clamping plate 51, the second clamping plate 52 and the insulator, thereby achieving a tight fit between the clamping assembly and the insulator. This helps to avoid the problem of unstable clamping of the cable caused by the first clamping plate 51 and the second clamping plate 52 moving relative to the insulator.

[0064] The specific steps for demolition are as follows: Step 1: Loosen the tension screw 4 to move the adjusting block 8 upwards to loosen the cable and reduce the tension. Step 2: Loosen the second clamping nut 72 to disengage the second clamping rod 32 from the second locking nut 62; Step 3: Remove the second pressure bar 32 from the connection port of the first clamping plate 51 and the second clamping plate 52; Step 4: Rotate the first clamping plate 51 counterclockwise and the second clamping plate 52 clockwise around the first clamping rod 31 to remove the 10kV overhead line insulator tensioning device of the present invention from bottom to top.

[0065] The installation and removal of this device are very simple and convenient.

[0066] This invention provides a novel 10kV overhead line insulator tightening device, which can be used for the fastening connection of porcelain insulator lines, replacing the existing conventional metal wire fastening connection method. In this solution, the components can be pre-assembled before installation, so that the components are connected as a whole, which can avoid the problem of parts being scattered or missing. At the same time, it is also convenient for high-altitude installation, reducing installation procedures and shortening operation time.

[0067] The present invention uses the cooperation of the pressure plate and the clamp assembly to press the cable onto the top groove of the pin insulator. The cable's pressed surface contacts the pressure groove 9 of the pressure plate 1 and the top groove of the pin insulator, which are both surface contacts with a large contact area, making it less likely to damage the cable's outer surface.

[0068] The cable clamping groove 9 of this invention has multiple convex ridges 10 with equal spacing, which increases the frictional resistance. Moreover, by adjusting the tightening screw 4, the cable can be firmly fixed and is not easy to fall off.

[0069] In this invention, one end of the pressure plate 1 and one end of the clamp assembly 2 are connected together by the second pressure rod 32 and the second locking nut 62, and the other end of the pressure plate 1 and the other end of the clamp assembly 2 are connected together by the first pressure rod 31 and the first locking nut 61. There are few loose parts that are not easy to lose, rotation is convenient, and installation and disassembly are convenient.

[0070] By providing an adjusting block 8, the present invention enables the adjusting block 8 to be inserted into the top groove, so as to clamp cables with small diameters, thereby increasing the range of applicable cable diameters.

[0071] This invention, by setting a thickened structure so that the upper and lower surfaces of the first clamping plate and the second clamping plate are respectively on the same plane, enables the upper and lower surfaces of the clamping assembly to be pressed and fixed against the inner wall of the annular side groove of the pin insulator when the clamping nut is tightened, thereby increasing the firmness and balance of the connection between the clamping assembly and the pin insulator.

[0072] The present invention features an insulating outer layer, ensuring that all parts of the cable's outer surface that come into direct contact with the cable are made of insulating material. This increases insulation, prevents the cable tensioner from damaging the cable's outer surface, and extends its service life.

[0073] The device of this invention has a robust and reliable overall structure, uniform operation, durability and safety, long service life, and effectively reduces maintenance costs.

[0074] The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solution based on the technical concept proposed in this invention shall fall within the scope of protection of this invention.

Claims

1. A tensioning device for insulators of overhead lines, characterized in that, include: Wire clamp (1); The adjusting block (8) has a pressure groove (9), and the pressure plate (1) has a limit groove (11), and the adjusting block (8) is located in the limit groove (11); A tensioning screw (4) is threaded through the pressure plate (1) and connected to the pressure plate (1). The tensioning screw (4) is rotatably connected to the adjusting block (8). Two clamping plates (5) are connected end to end in a ring structure; Two wire-pressing connecting rods (3), one end of the wire-pressing connecting rod (3) is connected to the wire-pressing plate (1), and the other end of the wire-pressing connecting rod (3) is connected to the connection point of the two clamping plates (5); The first locking limiting part (6) is arranged on the clamp plate (5) and located on the side of the clamp plate (5) away from the pressure plate (1). The first locking limiting part (6) is used to lock and limit the axial movement of the pressure connecting rod (3). The second locking limit part (7) is fixedly connected to the pressure line connecting rod (3) and is located on the side of the pressure line plate (1) away from the adjusting block (8).

2. The overhead line insulator tensioning device according to claim 1, characterized in that, The tensioning screw (4) is provided with a ball head (41), which is movably embedded in the adjusting block (8).

3. The overhead line insulator tensioning device according to claim 1, characterized in that, The two clamping plates (5) are a first clamping plate (51) and a second clamping plate (52). Both the first clamping plate (51) and the second clamping plate (52) have a first end (54) and a second end (55). The first end (54) of both the first clamping plate (51) and the second clamping plate (52) are provided with a slot (53). The second end (55) of the first clamping plate (51) is embedded in the slot (53) of the second clamping plate (52), and the second end (55) of the second clamping plate (52) is embedded in the slot (53) of the first clamping plate (51). The first clamping plate (51) and the second clamping plate (52) form a circular ring structure.

4. The overhead line insulator tensioning device according to claim 3, characterized in that, The two wire-pressing connecting rods (3) are respectively the first wire-pressing rod (31) and the second wire-pressing rod (32); The first pressure bar (31) passes through the first end (54) of the first clamping plate (51) and the second end (55) of the second clamping plate (52), and the second pressure bar (32) passes through the second end (55) of the first clamping plate (51) and the first end (54) of the second clamping plate (52). The first locking limiting part (6) consists of two parts, namely a first locking nut (61) and a second locking nut (62); the first locking nut (61) is sleeved on the first pressure rod (31) and is threadedly connected to the first pressure rod (31), the first locking nut (61) is fixedly connected to the first end (54) of the first clamping plate (51), and the first locking nut (61) is located on the side of the first clamping plate (51) away from the pressure plate (1); the second locking nut (62) is sleeved on the second pressure rod (32) and is threadedly connected to the second pressure rod (32), the second locking nut (62) is fixedly connected to the first end (54) of the second clamping plate (52), and the second locking nut (62) is located on the side of the second clamping plate (52) away from the pressure plate (1); The second locking limiting part (7) consists of two parts, namely a first clamping nut (71) and a second clamping nut (72); the first clamping nut (71) is fixedly connected to the first pressure rod (31), and the second clamping nut (72) is fixedly connected to the second pressure rod (32). The first clamping nut (71) and the second clamping nut (72) are both located on the side of the pressure plate (1) away from the adjusting block (8).

5. A tensioning device for overhead line insulators according to claim 3, characterized in that, Both the first clamping plate (51) and the second clamping plate (52) are provided with a thickened structure so that after the first clamping plate (51) and the second clamping plate (52) are connected, the upper and lower surfaces are respectively on the same plane; The first clamp (51) and the second clamp (52) have the same shape and size.

6. A tensioning device for overhead line insulators according to claim 3, characterized in that, Both the first clamping plate (51) and the second clamping plate (52) are provided with rubber pads, which are located on the inner side of the circular ring structure and are used to fill the gap between the circular ring structure and the porcelain insulator buckle.

7. The overhead line insulator tensioning device according to claim 1, characterized in that, The surfaces of the pressure plate (1) and the clamping plate (5) are both covered with an insulating outer layer.

8. A tensioning device for overhead line insulators according to claim 1, characterized in that, The limiting groove (11) is a rectangular groove or the cross section of the limiting groove (11) is arc-shaped, and the adjusting block (8) follows the shape of the limiting groove (11).

9. A tensioning device for overhead line insulators according to claim 1, characterized in that, The pressure groove (9) is provided with several protruding ridges (10).

10. A method for tightening insulators on overhead lines, based on the overhead line insulator tightening device according to any one of claims 1 to 9, characterized in that, The device is in a pre-assembled state before installation, wherein the two wire-pressing connecting rods (3) have passed through both ends of the wire-pressing plate (1), and one of the wire-pressing connecting rods (3) has passed through a joint of the two clamping plates (5) to form a hinge; the method includes the following steps: Place the cable on the top groove of the insulator, place the pressure plate (1) above the cable, so that the cable is below the pressure groove (9), and rotate the two clamping plates (5) around the hinged pressure connecting rod (3) so that the two clamping plates (5) are located on both sides of the insulator respectively. The two clamping plates (5) are rotated relative to each other so that the two clamping plates (5) are connected end to end to form a ring structure and clamp the side groove of the insulator. The other wire-pressing connecting rod (3) is passed through the second locking limiting part (7), the other end of the two clamping plates (5) and the first locking limiting part (6) in sequence, and through the first locking limiting part (6) and the second locking limiting part (7), the wire-pressing plate (1) is moved toward the clamping plate (5) to press the cable between the top groove of the insulator and the wire-pressing groove (9); Rotate the tensioning screw (4) to drive the adjusting block (8) to move within the limiting groove (11) and further adjust the tensioning pressure on the cable.

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