Lightning protection insulator for overhead transmission line

Abstract

The utility model discloses a lightning protection insulator used for an overhead transmission line, specifically relates to the insulator technology field, and comprises an insulator body, the bottom of the insulator body is provided with a lower rigid foot, the bottom of the lower rigid foot is provided with a first bolt, and the insulator body is connected with the lower rigid foot through the first bolt. A spherical protrusion is arranged on one side of the lower rigid foot, a hardware fitting body is arranged at the top of the insulator body, a wire pressing block is arranged at the top of the hardware fitting body, clamping holes are formed in the surfaces of the hardware fitting body and the wire pressing block, and clamping mechanisms are arranged in the two clamping holes. Mechanisms in the device can be dismounted and mounted, the device can be conveniently carried out, the insulating cover is made of silicone rubber materials, the device has good insulating performance and has the advantages of oxidation resistance and flame retardance, the labor intensity of workers is relieved, and the practicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of insulators, and more specifically, to a lightning protection insulator used for overhead power transmission lines. Background Art

[0002] Insulator is a special insulating control component that can play an important role in overhead transmission lines. It is the main body of transmission line insulation. Its function is to suspend the conductor and keep the conductor insulated from the tower and the ground. Therefore, a lightning protection insulator for overhead transmission lines is needed.

[0003] According to the patent application disclosure (announcement) number: CN204257296U, a lightning protection insulator for overhead power transmission lines, the spherical protrusion on the side of the lower steel foot and the insulating cover that covers the wire clamping hardware can protect the device, and three layers of umbrella edges are provided on the outer wall of the insulator body, and the diameter of each of the three layers of umbrella edges decreases successively from top to bottom. The utility model can not only well ensure the creepage distance of the discharge gap, but also has a very long lightning protection service life.

[0004] However, the above device may have the following problems during use: when the internal structure of the device needs to be repaired, the insulator body, the insulating cover and the three-layer umbrella ribs cannot be disassembled and repaired, which also causes inconvenience when carrying and installing outside. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides a lightning protection insulator for an overhead power transmission line to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A lightning protection insulator for an overhead power transmission line comprises an insulator body, a lower rigid foot is arranged at the bottom of the insulator body, a first bolt is arranged at the bottom of the lower rigid foot, the insulator body and the lower rigid foot are connected by the first bolt, a spherical protrusion is arranged on one side of the lower rigid foot, a hardware body is arranged at the top of the insulator body, a wire pressing block is arranged at the top of the hardware body, clamping holes are arranged on the surfaces of the hardware body and the wire pressing block, clamping mechanisms are arranged inside the two clamping holes, a connecting mechanism is sleeved on the outside of the wire pressing block, the connecting mechanism comprises an insulating cover sleeved on the outside of the wire pressing block, second bolts are arranged on both sides of the insulating cover, one end of the two second bolts extends to the inside of the hardware body, a connecting hole is arranged on one side of the insulating cover, an arc-starting rod is threadedly connected to the inside of the connecting hole, two fixing holes are arranged inside the connecting hole, a first spring is arranged inside the two fixing holes, a fixing plate is arranged at one end of the first spring, and a rubber pad is arranged on the surface of the fixing plate. The above technical solution is adopted to facilitate the disassembly and installation of the mechanism inside the device.

[0008] As a further description of the above technical solution: a plurality of connection grooves are provided on the outside of the insulator body, a clamping block is provided inside each of the plurality of connection grooves, a second spring is provided on one side of the clamping block, and an umbrella edge is connected to one end of the second spring. The above technical solution is adopted to facilitate disassembly between the insulator body and the umbrella edge.

[0009] As a further description of the above technical solution: the clamping mechanism includes a plurality of spring grooves opened inside the clamping hole, an electric telescopic rod is arranged inside the plurality of spring grooves, a third spring is arranged outside the electric telescopic rod, a clamping plate is arranged at one end of the third spring, a plurality of rotating shafts are arranged on the surface of the clamping plate, a rotating rod is arranged outside the plurality of rotating shafts, two third bolts are arranged on the surface of the wire pressing block, one end of the two third bolts extends to the interior of the hardware body, the wire pressing block and the hardware body are connected by the third bolts, and the above technical solution is adopted, which is convenient for application to insulated wires of different sizes.

[0010] Technical effects and advantages of the utility model:

[0011] 1. Through the coordinated use of the connecting mechanism, the connecting groove, the clamping block, the second spring and the triangular prism, the insulating cover is connected to the hardware body through the second bolt, the insulating cover and the wire pressing block can be disassembled and repaired, and the arc-starting rod on one side of the insulating cover can also be disassembled from the fixing hole of the insulating cover. The umbrella prism is sleeved on the outside of the insulator body, and the umbrella prism and the insulator body are fixed in the connecting groove by the second spring, so that the umbrella prism and the insulator body can be disassembled and connected, so that not only the structure of the device can be disassembled and repaired, but also the device can be carried out for installation, which improves the practicality of the device;

[0012] 2. By setting up a clamping mechanism, in order to make the hardware body and the wire pressing block suitable for insulated wires of different sizes, the electric telescopic rod drives the clamping plate to clamp the insulated wires of different sizes to prevent the insulated wires of different sizes from sliding inside the clamping hole. The rotating shaft on the surface of the clamping plate drives the rotating rod to rotate so that the insulated wire can slide on the surface of the clamping plate during transmission. When the insulated wire does not need to slide, the clamping force of the clamping plate driven by the electric telescopic rod can be increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0014] Figure 2 It is a schematic diagram of the connection hole structure of the utility model.

[0015] Figure 3 It is a schematic diagram of the umbrella rib structure of the utility model.

[0016] Figure 4 It is a schematic diagram of the clamping structure of the utility model.

[0017] Figure 5 It is a schematic diagram of the bottom structure of the utility model.

[0018] The accompanying drawings are marked as follows: 1. insulator body; 2. lower rigid foot; 3. first bolt; 4. spherical protrusion; 5. hardware body; 6. wire pressing block; 7. insulating cover; 8. second bolt; 9. connecting hole; 10. arc-starting rod; 11. first spring; 12. fixing plate; 13. connecting groove; 14. clamping block; 15. second spring; 16. umbrella edge; 17. third spring; 18. electric telescopic rod; 19. clamping plate; 20. rotating rod; 21. third bolt. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] The present application embodiment discloses Figure 1-5 The lightning protection insulator for overhead power transmission lines shown in the figure specifically comprises an insulator body 1, a lower rigid foot 2 is arranged at the bottom of the insulator body 1, a first bolt 3 is arranged at the bottom of the lower rigid foot 2, the insulator body 1 and the lower rigid foot 2 are connected by the first bolt 3, a spherical protrusion 4 is arranged on one side of the lower rigid foot 2, a hardware body 5 is arranged at the top of the insulator body 1, a wire pressing block 6 is arranged at the top of the hardware body 5, clamping holes are opened on the surfaces of the hardware body 5 and the wire pressing block 6, and clamping mechanisms are arranged inside the two clamping holes. The outer sleeve of the wire pressing block 6 is provided with a connecting mechanism, which includes an insulating cover 7 sleeved on the outer side of the wire pressing block 6, and second bolts 8 are provided on both sides of the insulating cover 7. One end of the two second bolts 8 extends to the inside of the hardware body 5. A connecting hole 9 is provided on one side of the insulating cover 7. The inner thread of the connecting hole 9 is connected to an arc-starting rod 10. Two fixing holes are provided inside the connecting hole 9. The first spring 11 is provided inside the two fixing holes. A fixing plate 12 is provided at one end of the first spring 11. A rubber pad is provided on the surface of the fixing plate 12. , the internal mechanism of the device is disassembled so that the device can be easily carried. The insulating cover 7 is connected to the hardware body 5 by the second bolt 8. The insulating cover 7 and the wire pressing block 6 can be disassembled and repaired. The arc-starting rod 10 on one side of the insulating cover 7 can also be disassembled from the fixing hole of the insulating cover 7. The arc-starting rod 10 is connected to the side of the wire clamping hardware and is bent to point to the lower steel foot. The end of the arc-starting rod 10 is opposite to the spherical protrusion 4 fixed to the side of the lower steel foot. The arc guided by the arc-starting rod 10 is between the arc-starting rod 10 and the spherical protrusion 4. The arc rod 10 and the lower steel leg are prevented from being damaged by lightning strikes. The diameters of the umbrella edges 16 are gradually reduced from top to bottom to ensure the creepage distance of the discharge gap and increase the rebound interval of the power frequency follow-current arc to reduce the probability of lightning tripping. The insulating cover 7 is made of silicone rubber material, which has good insulation performance and is anti-oxidation and flame retardant. At the same time, it reduces the labor intensity of the staff. Since the support insulator and the air overvoltage are combined into one, they are not affected by the load side of the ring network power supply, and the line is more beautiful and reduces the cost.

[0021] Reference Figure 1 and Figure 3As shown, a plurality of connection grooves 13 are provided on the outside of the insulator body 1, and a clamping block 14 is provided inside each of the connection grooves 13. A second spring 15 is provided on one side of the clamping block 14, and an umbrella rib 16 is connected to one end of the second spring 15. The umbrella rib 16 is sleeved on the outside of the insulator body 1, and the clamping block 14 is driven by the second spring 15 to be fixed inside the connection groove 13 between the umbrella rib 16 and the insulator body 1, so that it is convenient to disassemble and connect the umbrella rib 16 and the insulator body 1, so that not only the structure of the device can be disassembled and repaired, but also the device can be carried out for installation, thereby improving the practicality of the device.

[0022] Reference Figure 2 and Figure 4 As shown, the clamping mechanism includes a plurality of spring grooves provided inside the clamping hole, the interior of the plurality of spring grooves are all provided with an electric telescopic rod 18, the exterior of the electric telescopic rod 18 is provided with a third spring 17, a clamping plate 19 is provided at one end of the third spring 17, a plurality of rotating shafts are provided on the surface of the clamping plate 19, a rotating rod 20 is provided on the exterior of the plurality of rotating shafts, two third bolts 21 are provided on the surface of the pressing block 6, one end of the two third bolts 21 extends to the interior of the hardware body 5, the pressing block 6 and the hardware body 5 are connected by the third bolts 21, in order to make the hardware body 5 and the pressing block 6 suitable for insulated wires of different sizes, the electric telescopic rod 18 drives the clamping plate 19 to clamp the insulated wires of different sizes to prevent the insulated wires of different sizes from sliding inside the clamping hole, the rotating shaft on the surface of the clamping plate 19 drives the rotating rod 20 to rotate so that the insulated wire can slide on the surface of the clamping plate 19 during transmission, and when the insulated wire does not need to slide, the clamping force of the clamping plate 19 driven by the electric telescopic rod 18 can be increased.

[0023] Working principle of the utility model: first, the mechanism inside the device is disassembled so that the device can be conveniently carried. The insulating cover 7 is connected to the hardware body 5 by the second bolt 8, and the insulating cover 7 and the wire pressing block 6 can be disassembled and repaired. The arc-starting rod 10 on one side of the insulating cover 7 can also be disassembled from the fixing hole of the insulating cover 7. The umbrella rib 16 is sleeved on the outside of the insulator body 1. The umbrella rib 16 and the insulator body 1 are fixed inside the connecting groove 13 by the second spring 15, so that the umbrella rib 16 and the insulator body 1 can be disassembled and connected conveniently, so that not only the structure of the device can be disassembled and repaired, but also the device can be carried out for installation, which improves the practicality of the device. Repeating the above reverse steps can install the mechanism inside the device.

[0024] In order to make the insulated wires of different sizes suitable for the hardware body 5 and the wire pressing block 6, the electric telescopic rod 18 drives the clamping plate 19 to clamp the insulated wires of different sizes to prevent the insulated wires of different sizes from sliding inside the clamping hole. The rotating shaft on the surface of the clamping plate 19 drives the rotating rod 20 to rotate so that the insulated wire can slide on the surface of the clamping plate 19 during transmission. When the insulated wire does not need to slide, the clamping force of the clamping plate 19 driven by the electric telescopic rod 18 can be increased. The arc-starting rod 10 is connected to the side of the clamping hardware and is bent to point to the lower steel foot. The end of the arc-starting rod 10 is fixed to the side of the lower steel foot. The spherical protrusions 4 are opposite to each other in the air, and the arc guided by the arc-starting rod 10 burns between the arc-starting rod 10 and the spherical protrusion 4, thereby avoiding direct damage to the arc-starting rod 10 and the lower steel leg due to lightning strikes. The diameters of the umbrella edges 16 decrease gradually from top to bottom, thereby ensuring the creepage distance of the discharge gap and increasing the rebound range of the power frequency follow-current arc to reduce the probability of lightning tripping. The insulating cover 7 is made of silicone rubber material, which has good insulation properties and is anti-oxidation and flame retardant. At the same time, it reduces the labor intensity of the staff. Since the support insulator and the air overvoltage are combined into one, it is not affected by the load side of the ring network power supply, and the line is more beautiful and reduces costs.

[0025] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A lightning protection insulator for an overhead transmission line, comprising an insulator body (1), characterized in that: A lower rigid foot (2) is arranged at the bottom of the insulator body (1), a first bolt (3) is arranged at the bottom of the lower rigid foot (2), the insulator body (1) and the lower rigid foot (2) are connected via the first bolt (3), a spherical protrusion (4) is arranged on one side of the lower rigid foot (2), a hardware body (5) is arranged at the top of the insulator body (1), a wire pressing block (6) is arranged at the top of the hardware body (5), clamping holes are provided on the surfaces of the hardware body (5) and the wire pressing block (6), clamping mechanisms are arranged inside the two clamping holes, and a connecting mechanism is sleeved on the outside of the wire pressing block (6).

2. The lightning protection insulator for overhead power transmission lines according to claim 1, characterized in that: The connecting mechanism comprises an insulating cover (7) sleeved on the outside of the wire pressing block (6), second bolts (8) are arranged on both sides of the insulating cover (7), one end of each of the two second bolts (8) extends into the interior of the hardware body (5), a connecting hole (9) is provided on one side of the insulating cover (7), an arc-starting rod (10) is threadedly connected to the interior of the connecting hole (9), two fixing holes are provided inside the connecting hole (9), first springs (11) are arranged inside the two fixing holes, a fixing plate (12) is arranged at one end of the first spring (11), and a rubber pad is arranged on the surface of the fixing plate (12).

3. The lightning protection insulator for overhead power transmission lines according to claim 1, characterized in that: The insulator body (1) is provided with a plurality of connection grooves (13) on the outside, each of the plurality of connection grooves (13) is provided with a clamping block (14), a second spring (15) is provided on one side of the clamping block (14), and one end of the second spring (15) is connected to an umbrella ridge (16).

4. The lightning protection insulator for overhead power transmission lines according to claim 1, characterized in that: The clamping mechanism comprises a plurality of spring slots formed inside the clamping hole, an electric telescopic rod (18) being arranged inside each of the plurality of spring slots, and a third spring (17) being arranged outside the electric telescopic rod (18).

5. The lightning protection insulator for overhead power transmission lines according to claim 4, characterized in that: A clamping plate (19) is provided at one end of the third spring (17), a plurality of rotating shafts are provided on the surface of the clamping plate (19), and a rotating rod (20) is provided outside each of the plurality of rotating shafts.

6. The lightning protection insulator for overhead power transmission lines according to claim 1, characterized in that: Two third bolts (21) are provided on the surface of the wire pressing block (6), one end of the two third bolts (21) extends into the interior of the hardware body (5), and the wire pressing block (6) and the hardware body (5) are connected via the third bolts (21).

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