Lightning protection arrester insulator discharge ring

Abstract

The utility model discloses an insulator discharge ring of a lightning arrester, and relates to the technical field of lightning protection and lightning protection, in particular to the insulator discharge ring of the lightning arrester, which comprises a discharge ring and an outer sleeve umbrella skirt, and the discharge ring comprises an upper discharge ring and a lower discharge ring. According to the lightning protection arrester insulator discharge ring, through the arrangement of the upper discharge ring, the upper crimping piece, the outer sleeve umbrella skirt, the high-gradient zinc oxide resistor disc, the lower electrode, the lower fitting, the discharge connecting rod, the upper electrode, the lower discharge ring and the drawing rod, the lightning protection arrester insulator discharge ring has the functions of improving the arc guide and arc extinguishing of the insulator; through full discharge between the two discharge rings of 50 mm-60 mm, the discharge area is equal to the sum of the areas of the two rings and is far larger than the spherical area, the arc guide and arc extinguishing functions of the insulator can be effectively improved, the lightning protection performance of the product is more excellent due to the connection of the two discharge rings, and the purpose of improving the practicability is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of lightning protection and lightning arrester, in particular to a discharge loop of a lightning protection arrester insulator. Background Technique

[0002] With the popularization of the insulation work of overhead distribution networks, there have been many studies on measures to prevent lightning breakage of insulated conductors. However, at present, the lightning protection measures for insulated distribution lines abroad are mainly applied to the insulators of straight poles, and there are no lightning protection measures for strain insulators. An insulator is a device that can withstand voltage and mechanical stress and is installed between conductors at different potentials or between a conductor and a grounding member. There are many types of insulators with different shapes. Although the structures and appearances of different types of insulators are quite different, they are all composed of two major parts: insulating parts and connecting fittings. An insulator is a special insulating control device that plays an important role in overhead transmission lines. In the early years, insulators were mostly used for utility poles. Slowly, many disc-shaped insulators were hung at one end of the high-voltage wire connection tower. It is used to increase the creepage distance and is usually made of glass or ceramics, which is called an insulator. The insulator should not fail due to various mechanical and electrical stresses caused by changes in environmental and electrical load conditions. Otherwise, the insulator will not play a major role and will damage the service life and operation life of the entire line. Due to the relatively harsh working conditions of the zinc oxide arrester, there is a normal leakage current in the zinc oxide arrester under normal conditions, which causes a large loss to the line. Therefore, a gap discharge, that is, a discharge ball, is added to the zinc oxide arrester. Using the principle of spherical discharge, it is not connected at low voltage, greatly reducing the leakage current, and the spherical discharge is connected at high voltage. However, since the conduction rate of spherical discharge is related to the size of the spherical surface, the conduction rate in the case of discharge is limited.

[0003] Now, a discharge loop of a lightning protection arrester insulator is invented to solve the problem of insufficient discharge in the case of discharge. Content of the Utility Model

[0004] (1) Technical Problem to be Solved

[0005] Aiming at the deficiencies of the prior art, the utility model provides a discharge loop of a lightning protection arrester insulator, which solves the problems put forward in the above background technique.

[0006] (2) Technical Solution

[0007] To achieve the above objectives, the utility model is realized through the following technical solutions: A lightning protection arrester insulator discharge ring, comprising a discharge ring and an outer umbrella skirt. The discharge ring includes an upper discharge ring and a lower discharge ring. Inside the outer umbrella skirt, a lower electrode, a high-gradient zinc oxide resistor chip, and an upper electrode are respectively placed. A draw rod is inserted into the inside of the outer umbrella skirt. An upper crimping part is installed at the top of the draw rod, and a lower fitting is installed at one end of the draw rod away from the upper crimping part. Discharge connecting rods are installed on the outer surfaces of the upper discharge ring and the lower discharge ring. An arc guiding cover and a tying part are respectively arranged at the top of the upper crimping part.

[0008] Optionally, one end of the upper crimping part close to the draw rod and one end of the lower fitting close to the draw rod are both located inside the outer umbrella skirt.

[0009] Optionally, the end of the discharge connecting rod penetrates through the outer umbrella skirt, and the discharge connecting rod connected to the upper discharge ring is fixedly connected to the upper crimping part.

[0010] Optionally, the upper discharge ring and the lower discharge ring are sleeved with each other, and the position of the upper discharge ring is higher than that of the lower discharge ring.

[0011] Optionally, the lower electrode is fixedly connected to the lower fitting through a threaded setscrew, and one end of the discharge connecting rod away from the lower discharge ring is fixedly connected to the upper electrode through a threaded setscrew.

[0012] Optionally, the position of the lower electrode is lower than that of the high-gradient zinc oxide resistor chip, and the position of the high-gradient zinc oxide resistor chip is lower than that of the upper electrode.

[0013] Optionally, the draw rod penetrates through the lower electrode, the high-gradient zinc oxide resistor chip, and the upper electrode respectively.

[0014] Optionally, the maximum diameter of the discharge ring is 60 mm, and the minimum diameter of the discharge ring is 50 mm.

[0015] The utility model provides a lightning protection arrester insulator discharge ring, which has the following beneficial effects:

[0016] 1. For this lightning protection arrester insulator discharge ring, through the settings of the upper discharge ring, the upper crimping part, the outer umbrella skirt, the high-gradient zinc oxide resistor chip, the lower electrode, the lower fitting, the discharge connecting rod, the upper electrode, the lower discharge ring, and the draw rod, the lightning protection arrester insulator discharge ring has the functions of improving the arc guiding and arc extinguishing of the insulator. Through sufficient discharge between two 50 mm - 60 mm discharge rings, the discharge area is equal to the sum of the areas of the two rings, which is much larger than the area of a sphere, and can effectively improve the arc guiding and arc extinguishing functions of the insulator. The connection of the two discharge rings makes the lightning protection performance of the product more excellent, achieving the purpose of improving the high practicality.

[0017] 2. The lightning protection arrester insulator discharge ring, through the settings of the upper discharge ring, upper crimping part, outer umbrella skirt, high-gradient zinc oxide resistor chip, lower electrode, lower fitting, discharge connecting rod, upper electrode, lower discharge ring and drawing rod, enables the lightning protection arrester insulator discharge ring to have the effects of simple tooling and strong lightning protection performance. The tooling of the discharge ring is relatively simple, and the manufacturing difficulty is less than that of a normal spherical insulator. While improving the performance, the production efficiency is also improved. This annular insulator has the advantages of a spherical insulator and strong lightning protection performance, and its installation does not require changing the existing tower structure, which is conducive to promotion. After being put into operation, it is basically maintenance-free, achieving the purpose of improving practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view sectional structure schematic diagram of the present utility model.

[0019] In the figure: 1. Binding wire part; 2. Upper discharge ring; 3. Upper crimping part; 4. Outer umbrella skirt; 5. High-gradient zinc oxide resistor chip; 6. Lower electrode; 7. Lower fitting; 8. Discharge connecting rod; 9. Upper electrode; 10. Lower discharge ring; 18. Drawing rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments.

[0021] Embodiment 1

[0022] Please refer to Figure 1, the present utility model provides a technical solution: a lightning protection arrester insulator discharge ring, which includes a discharge ring and an outer umbrella skirt 4. The maximum diameter of the discharge ring is 60 mm, and the minimum diameter of the discharge ring is 50 mm. The discharge ring includes an upper discharge ring 2 and a lower discharge ring 10. The upper discharge ring 2 and the lower discharge ring 10 are sleeved with each other, and the position of the upper discharge ring 2 is higher than that of the lower discharge ring 10. Inside the outer umbrella skirt 4, a lower electrode 6, a high-gradient zinc oxide resistor chip 5, and an upper electrode 9 are respectively placed. The lower electrode 6 is fixedly connected to the lower fitting 7 through a threaded set screw. One end of the discharge connecting rod 8 away from the lower discharge ring 10 is fixedly connected to the upper electrode 9 through a threaded set screw. The position of the lower electrode 6 is lower than that of the high-gradient zinc oxide resistor chip 5, and the position of the high-gradient zinc oxide resistor chip 5 is lower than that of the upper electrode 9. A drawbar 18 is inserted into the inside of the outer umbrella skirt 4. The drawbar 18 respectively penetrates through the lower electrode 6, the high-gradient zinc oxide resistor chip 5, and the upper electrode 9. An upper crimping part 3 is installed at the top of the drawbar 18. One end of the upper crimping part 3 close to the drawbar 18 and one end of the lower fitting 7 close to the drawbar 18 are both located inside the outer umbrella skirt 4. A lower fitting 7 is installed at one end of the drawbar 18 away from the upper crimping part 3. Discharge connecting rods 8 are installed on the outer surfaces of the upper discharge ring 2 and the lower discharge ring 10. The end of the discharge connecting rod 8 penetrates through the outer umbrella skirt 4, and the discharge connecting rod 8 connected to the upper discharge ring 2 is fixedly connected to the upper crimping part 3. An arc guide cover and a tying part 1 are respectively arranged at the top of the upper crimping part 3.

[0023] In use, first place the lower electrode 6 into the tooling, then sequentially place the high-gradient zinc oxide resistor chip 5 and the upper electrode 9. Place the arranged lower electrode 6, high-gradient zinc oxide resistor chip 5, and upper electrode 9 into a glass fiber winding machine for winding. Subsequently, place the resistor chip group wrapped with glass fiber into an oven for high-temperature curing. Then, place the wound resistor chip group into an oven for curing and then grind it on a grinder until the outer surface is rough to obtain a lightning protection winding core. For high-voltage testing, pass the drawbar 18 through the made lightning protection winding core. First, fixedly connect one end of the drawbar 18 to the lower fitting 7 through a press-fitting machine, and then fixedly connect the other end of the drawbar 18 to the upper press-fitting part 3 with a press-fitting machine. Fix the lower electrode 6 at one end of the lightning protection winding core close to the lower fitting 7 to the lower fitting 7 with a threaded jackscrew. Fix the upper electrode 9 at the other end of the lightning protection winding core to the discharge connecting rod 8 with a threaded jackscrew and a spring washer to obtain an integrated lightning protection core group. Place the made integrated lightning protection core group into an injection vulcanization mold to inject and vulcanize to form a rubber outer umbrella skirt 4 to obtain a vulcanized insulator. Then, sequentially connect the upper press-fitting part 3 of the vulcanized insulator to the arc guide cover and the wire tying part 1. Finally, fix the discharge ring to the discharge connecting rod 8 to obtain a lightning protection ring-shaped insulator. Through sufficient discharge between two discharge rings of 50 mm - 60 mm, the discharge area is equal to the sum of the areas of the upper discharge ring 2 and the lower discharge ring 10, which is much larger than the area of a sphere, and can effectively improve the arc guiding and arc extinguishing functions of the insulator. The connection of the two discharge rings makes the lightning protection performance of the product more excellent. The tooling of the discharge ring is relatively simple, and the manufacturing difficulty is less than that of a normal spherical insulator, improving the production efficiency while improving the performance. This ring-shaped insulator has the advantages of a spherical insulator and strong lightning protection performance, and its installation does not require changing the existing tower structure, which is conducive to promotion and basically requires no maintenance after being put into operation.

[0024] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A discharge ring for a lightning arrester insulator, comprising a discharge ring and a jacket shed, characterized in that: The discharge ring comprises an upper discharge ring and a lower discharge ring. A lower electrode, a high-gradient zinc oxide resistor and an upper electrode are placed inside the outer shed respectively. A pull-out rod is inserted inside the outer shed. An upper crimping piece is installed on the top of the pull-out rod. A lower hardware is installed on the end of the pull-out rod away from the upper crimping piece. Discharge connecting rods are installed on the outer surfaces of the upper discharge ring and the lower discharge ring. An arc guide cover and a wire tie are respectively arranged on the top of the upper crimping piece.

2. The lightning arrester insulator discharge ring according to claim 1, characterized in that: One end of the upper crimping part close to the drawing rod and one end of the lower hardware close to the drawing rod are both located inside the outer sheath.

3. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The end of the discharge connecting rod passes through the outer sheath, and the discharge connecting rod connected to the upper discharge ring is fixedly connected to the upper crimping piece.

4. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The upper discharge ring and the lower discharge ring are sleeved with each other, and the position of the upper discharge ring is higher than that of the lower discharge ring.

5. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The lower electrode is fixedly connected to the lower hardware by a threaded top screw, and one end of the discharge connecting rod away from the lower discharge ring is fixedly connected to the upper electrode by a threaded top screw.

6. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The position of the lower electrode is lower than the position of the high-gradient zinc oxide resistor, and the position of the high-gradient zinc oxide resistor is lower than the position of the upper electrode.

7. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The lead rods penetrate the lower electrode, the high-gradient zinc oxide resistor and the upper electrode respectively.

8. The lightning arrester insulator discharge ring according to claim 1, characterized in that: The maximum diameter of the discharge ring is 60mm, and the minimum diameter of the discharge ring is 50mm.

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