Live-line work series annular gap overvoltage protector with fault indication function

Abstract

The utility model provides a live working series annular gap overvoltage protector with fault indication, which relates to the technical field of power distribution equipment, and comprises a protector body and two groups of discharge electrodes, the protector body is provided with an electrode installation area, the discharge electrodes are installed at the electrode installation area through a support, and the discharge electrodes are annular. A discharge gap is formed between the two groups of discharge electrodes, and the opposite sides of the two groups of discharge electrodes are of arc-shaped structures. By adopting the integrated design of the insulation supporting piece and the protector body, an electrode support does not need to be additionally installed, and the problem that a traditional overvoltage protector body and gap supporting insulator split type structure product is prone to loosening and mechanical damage in the live-line work installation and subsequent operation process is solved. The double-ring-shaped discharge electrode adopts an arc-shaped structure, so that the discharge is uniform and stable during lightning stroke discharge, the size is large, the heat dissipation performance is good, lightning stroke electric arcs can be rapidly dissipated, and the arc extinguishing is rapid.

Description

Technical Field

[0001] The utility model relates to the technical field of distribution equipment, in particular to an overvoltage protector with a fault indication and a series of annular gaps for live working. Background Art

[0002] The overvoltage protector is used to limit the amplitude of lightning overvoltage, avoid line tripping and power outage, and improve the power supply reliability. The traditional overvoltage protector generally uses a spherical conductive head (electrode). Due to the small volume of the spherical conductive head, it is difficult to improve the heat dissipation performance, and the formed discharge gap is small. In addition, the traditional conductive head and the protector body are generally arranged in a split type, which is easy to loosen during the installation and use process. The insulation creepage distances of the discharge gap insulation support and the protector body are both short. In view of the above defects, this application is proposed. Content of the Utility Model

[0003] The purpose of the utility model is to provide an overvoltage protector with a fault indication and a series of annular gaps for live working. By setting double annular discharge electrodes, the discharge is uniform, stable and has good heat dissipation during lightning strike discharge. The lightning arc can dissipate heat quickly and extinguish the arc quickly. And an integrated installation structure is adopted to solve the problem of easy loosening of the traditional split type.

[0004] To solve the above problems, the utility model provides an overvoltage protector with a fault indication and a series of annular gaps for live working, which includes a protector body and two groups of discharge electrodes. An electrode installation area is arranged on the protector body, and the discharge electrodes are installed at the electrode installation area through brackets. The discharge electrodes are annular, and a discharge gap is formed between the two groups of discharge electrodes. The opposite side of the two groups of discharge electrodes is an arc-shaped structure.

[0005] According to an embodiment of the utility model, the discharge electrode has a hollow structure, which reduces the weight and cost.

[0006] According to an embodiment of the utility model, through holes connected to the hollow structure are arranged on the discharge electrode for sewage discharge.

[0007] According to an embodiment of the utility model, several through holes are arranged, generally three.

[0008] According to an embodiment of the utility model, an umbrella skirt structure is arranged at the electrode installation area, so that the insulation creepage distances of the discharge gap insulation support and the protector body are longer, and it is suitable for installation in heavily polluted areas.

[0009] According to an embodiment of the utility model, the insulating jacket of the protector body adopts an anti-pollution structure.

[0010] According to an embodiment of the utility model, the protector body is connected to a fault indicator, and the copper wire of the fault indicator is connected to a metal bracket.

[0011] According to an embodiment of the present utility model, the contact position between the bracket and the electrode installation area has an arc surface to ensure stable installation.

[0012] According to an embodiment of the present utility model, bolt installation holes are provided on the metal bracket, and bolt fixing components are provided at the ends of the protector body.

[0013] According to an embodiment of the present utility model, each discharge electrode is supported by three groups of brackets.

[0014] According to an embodiment of the present utility model, a bracket connection part is provided on the discharge electrode, and the bracket connection part is connected to the bracket through a bolt assembly.

[0015] The beneficial effect of the present utility model is that an integrated design of an insulating support and the protector body is adopted, eliminating the need for additional installation of electrode brackets, and solving the problems of easy loosening and mechanical damage during live working installation and subsequent operation of traditional overvoltage protector bodies and gap support insulators with a split structure.

[0016] Due to the arc-shaped structure of the double-ring discharge electrode, the discharge is uniform and stable during lightning strikes. It has a large volume and good heat dissipation, and the lightning arc can dissipate heat quickly, extinguishing the arc rapidly.

[0017] Due to the structure that can be bolt-fixed at both ends, an installation method that allows live working is realized, and there is no need to cut off the power supply of the line when installing the overvoltage protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present utility model will be further described below with reference to the drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of an overvoltage protector with a series-connected ring gap for live working with fault indication;

[0020] Figure 2 It is a cross-sectional view of the discharge electrode;

[0021] Figure 3 It is a schematic diagram of the installation of an overvoltage protector with a series-connected ring gap for live working with fault indication. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The following description is only used to disclose the present utility model so that those skilled in the art can implement the present utility model. The embodiments described below are only examples, and those skilled in the art can think of other obvious variations. The basic principles defined in the following description can be applied to other implementation schemes, variation schemes, improvement schemes, equivalent schemes, and other schemes that do not depart from the spirit and scope of the present utility model.

[0023]

Example 1

[0024] The live working type overvoltage protector with fault indication and series annular gap includes, as shown in Figure 1 , a protector body 1 and two sets of discharge electrodes 2.

[0025] An electrode installation area 11 (formed by insulating supports) is provided on the protector body 1. The discharge electrodes 2 are installed at the electrode installation area 11 through brackets 3. The insulating supports and the protector body are integrally designed, eliminating the need for additional installation of electrode brackets and solving the problem of easy loosening during the live working installation and subsequent operation of traditional overvoltage protector products with a split structure of the protector body and gap support insulators.

[0026] The discharge electrodes 2 are annular. A discharge gap 8 is formed between the two sets of discharge electrodes 2. The relative side of the two sets of discharge electrodes 2 is an arc-shaped structure, as shown in Figure 2 . The discharge electrodes 2 have a hollow structure 21. In this embodiment, the hollow structure 21 is also annular. The discharge electrodes 2 are preferably formed by stamping a plate, with a light structure. Through holes 22 connected to the hollow structure 21 are provided on the discharge electrodes 2 for sewage discharge. It should be noted that Figure 2 the arc of the interface shown in

[0027] is not limited to a semi-circular arc and can also be an arc of other angles. The series gap of the overvoltage protector adopts a double annular gap. One pole is fixed at the upper end of the insulating support, and the other pole is fixed at the upper end of the protector body of the overvoltage protector. It is grounded through the current-limiting element of the protector body. During lightning strikes, the gap is broken down and discharges. Due to the excellent nonlinearity of the current-limiting element of the protector body, the power frequency follow current is limited to a very small value and is a spike wave, which is beneficial to the rapid extinction of the arc.

[0028] Preferably, several through holes 22 are provided. Generally, three through holes 22 are provided on one discharge electrode 2. The through holes 22 can be arranged at the bottom or side of the arc surface.

[0029] Due to the arc-shaped structure, the double annular discharge electrodes have uniform and stable discharge during lightning strikes. They have a large volume and good heat dissipation, enabling the lightning strike arc to dissipate heat quickly and extinguish the arc rapidly.

[0030] Furthermore, a petticoat structure 12 is provided at the electrode installation area 11. The petticoat structure 12 includes several umbrella-shaped structures for increasing the creepage distance. Specifically, the umbrella-shaped structures are made of silicone rubber insulators with excellent hydrophobicity, large creepage distance, and strong anti-pollution performance.

[0031] In this embodiment, the insulating jacket of the protector body 1 adopts an anti-pollution structure, that is, the umbrella-shaped structures on it are arranged at intervals of one large and one small.

[0032] The protector body 1 is connected to the fault indicator 4 to achieve the fault indication function. An insulating bracket 7 is installed on the protector body 1, and the fault indicator 4 is installed on the insulating bracket 7. The metal bracket 5 is connected to the insulating bracket 7, and the flexible copper wire of the fault indicator 4 is connected to the metal bracket 5.

[0033] As Figure 1 , bolt mounting holes are provided on the metal bracket 5, and it can be fixedly connected to the protector cross arm through bolts. A bolt fixing assembly is provided at the left end of the protector body 1 for connection with the high-voltage drainage wire. One end of the high-voltage drainage wire is fixedly connected to the high-voltage end of the overvoltage protector, and the other end is fixedly connected to the drainage wire clamp. Then, the drainage wire clamp is hung on the energized high-voltage wire using an insulating operating rod, and then the handle on the drainage wire clamp is tightened. Due to the structure that can be fixed with bolts at both ends, an installation method that allows live working is achieved, and there is no need to cut off the power supply of the line when installing the overvoltage protector.

[0034] Specifically, the overvoltage protector accessories include a drainage wire 101 and a drainage wire clamp 102. The drainage wire clamp can be an elastic clamp that directly clamps onto the energized high-voltage wire 104 using elasticity, or a bolt clamping method can be adopted, where the drainage wire clamp is clamped onto the energized high-voltage wire 104 by tightening the bolts.

[0035] As Figure 3 , during installation, a protector cross arm 105 is horizontally installed below the insulator cross arm 106 on the pole 103. A bolt assembly is installed on the protector cross arm 105 and connected to the metal bracket 5. One end of the drainage wire 101 is fixedly connected to the high-voltage end of the overvoltage protector (i.e., the bolt fixing assembly provided at the left end of the protector body 1), and the other end is fixedly connected to the drainage wire clamp 102. Then, the drainage wire clamp is hung on the energized high-voltage wire 104 using an insulating operating rod, and the drainage wire clamp 102 is tightened and fixed on the energized high-voltage wire 104. Further, as Figure 3 , in order not to affect the operation of the operating rod, the terminal connected to the drainage wire clamp 102 is installed at a 90° angle to the clamp, and the bolt for tightening is located at the bottom of the drainage wire clamp 102.

[0036] The fault indicator 4 adopts the solution in the prior art, such as the fault indicator disclosed in CN220324915U; when the fault indicator is impacted by a large lightning current or an operating overvoltage, it will not operate. When withstanding power frequency overvoltage, the indicator will not operate. Only when a fault occurs in the protector body (such as internal insulation failure and short circuit), its fault current starts the fault indicator, so that the faulty protector is forcibly disconnected from the system grounding wire, thus ensuring that the system will not have a single-phase grounding fault and avoiding the protector grounding fault. The working process is roughly as follows: when the current transformer detects that the power frequency fault current exceeds the set value, within a short time, the fault indicator can quickly operate and forcibly disconnect from the system. At the same time of disconnection, a marking ribbon is marked to clearly indicate the faulty protector.

[0037] Preferably, the contact position between the bracket 3 and the electrode installation area 11 has an arc surface, such as Figure 1 , the contact position between the right bracket 3 and the surface of the protector body 1 is an arc surface, so that it can stably contact the protector body 1, and then the bolt assembly passes through the outer insulation and is connected to the inside of the protector body.

[0038] Optionally, each discharge electrode 2 is supported by three groups of brackets 3.

[0039] A bracket connection part 23 is arranged on the discharge electrode 2. The bracket connection part 23 is plate-shaped and can be integrally formed on the discharge electrode 2 or can be welded later. The bracket connection part 23 is connected to the bracket 3 through a bolt assembly.

[0040] Embodiment 2, on the basis of Embodiment 1, when the protector is vertically arranged, the through holes 22 of the two discharge electrodes 2 are coaxially arranged.

[0041] Those skilled in the art should understand that the above description and the embodiments of the present invention shown in the drawings are only examples and do not limit the present invention. The object of the present invention has been fully and effectively achieved. The function and structural principle of the present invention have been shown and described in the embodiments. Without departing from the said principle, any deformation and modification of the embodiments of the present invention are possible.

Claims

1. Live working series ring gap overvoltage protector with fault indication, characterized in that: It includes a protector body (1) and two groups of discharge electrodes (2). An electrode installation area (11) is provided on the protector body (1). The discharge electrodes (2) are installed at the electrode installation area (11) through brackets (3). The discharge electrodes (2) are annular, and a discharge gap (8) is formed between the two groups of discharge electrodes (2). The opposite side of the two groups of discharge electrodes (2) is an arc-shaped structure.

2. The overvoltage protector with a series ring gap for live working with fault indication according to claim 1, characterized in that: The discharge electrode (2) has a hollow structure (21).

3. The live working with-fault-indication series-connected ring-gap overvoltage protector according to claim 2, characterized in that: A through hole (22) connected to the hollow structure (21) is provided on the discharge electrode (2).

4. The live working type series gap overvoltage protector with fault indication according to any one of claims 1-3, characterized in that: A petticoat structure (12) is provided at the electrode installation area (11).

5. The live working type fault indication series loop gap overvoltage protector according to any one of claims 1-3, characterized in that: The insulating jacket of the protector body (1) adopts an anti-pollution structure.

6. The live working with-fault-indication series-ring-gap overvoltage protector according to claim 4, characterized in that: The protector body (1) is connected to a fault indicator (4), and the wire of the fault indicator (4) is connected to a metal bracket (5).

7. The live working type fault indication series ring gap overvoltage protector according to any one of claims 1-3, characterized in that: The contact position between the bracket (3) and the electrode installation area (11) has an arc surface.

8. The live working type series loop gap overvoltage protector with fault indication according to claim 7, characterized in that: Each discharge electrode (2) is supported by three groups of brackets (3).

9. The live working type fault indicating series ring gap overvoltage protector according to claim 6, characterized in that: Bolt mounting holes are provided on the metal bracket (5), and bolt fixing components are provided at the end of the protector body (1).

10. The live working type fault indication series loop gap overvoltage protector according to claim 9, characterized in that: A bracket connection part (23) is provided on the discharge electrode (2), and the bracket connection part (23) is connected to the bracket (3) through a bolt assembly.

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