lightning arrester

Abstract

This invention provides a surge arrester, comprising: an arc-extinguishing tube, the arc-extinguishing tube including a tube body and an arc-extinguishing medium, the tube body having a receiving space, the arc-extinguishing medium being disposed within the receiving space, and an opening at one end of the tube body communicating with the receiving space; and an operation indicator, the operation indicator being detachably disposed at the opening, the operation indicator including an indicator head and a mounting post, a first end of the mounting post being connected to the indicator head, and a second end of the mounting post being inserted into the receiving space through the opening, the second end of the mounting post having a guide bevel. The technical solution of this application effectively solves the problem in related technologies where the gas flow ejected by the surge arrester easily leads to reduced insulation of adjacent conductors, causing short-circuit faults.

Description

Technical Field

[0001] This invention relates to the field of lightning protection equipment technology, and more specifically, to a lightning arrester. Background Technology

[0002] Currently, most high-voltage power distribution lines are overhead, making them susceptible to lightning strikes and external damage during operation. Electric shocks are also frequent, causing serious economic losses and threatening personal safety. Insulating overhead conductors can reduce the risk of external damage and electric shock, and some high-voltage overhead power distribution lines have already implemented insulation. However, insulated conductors are prone to breakage when struck by lightning.

[0003] Surge arresters using jet arc extinguishing technology can be applied to high-voltage overhead power distribution lines. However, due to the small distance between lines, such as about 1 meter between lines in a 10kV line, the jetting airflow can easily reduce the insulation of adjacent conductors, causing short-circuit faults. Summary of the Invention

[0004] The main objective of this invention is to provide a surge arrester that solves the problem in related technologies where the airflow ejected by the surge arrester can easily lead to reduced insulation of adjacent conductors, causing short-circuit faults.

[0005] To achieve the above objectives, according to one aspect of the present invention, a surge arrester is provided, comprising: an arc-extinguishing tube, the arc-extinguishing tube including a tube body and an arc-extinguishing medium, the tube body having a receiving space, the arc-extinguishing medium being disposed within the receiving space, and an opening being provided at the end of the tube body, the opening communicating with the receiving space; and an operation indicator, the operation indicator being detachably disposed at the opening, the operation indicator including an indicator head and a mounting post, a first end of the mounting post being connected to the indicator head, a second end of the mounting post being inserted into the receiving space through the opening, and the second end of the mounting post having a guide bevel.

[0006] Furthermore, the motion indicator also includes a flexible connecting post disposed between the indicator head and the mounting post, the diameter of which is larger than the diameter of the accommodating space.

[0007] Furthermore, the motion indicator also includes a clearance post, which is connected between the connecting post and the indicator head. The diameter of the clearance post is smaller than that of the flexible connecting post.

[0008] Furthermore, the surge arrester also includes a first mounting base and a second mounting base detachably connected to the first mounting base. The first mounting base is disposed on the horizontal plate of the crossarm, the second mounting base is disposed on the vertical plate of the crossarm, and the tube body is disposed on the side of the first mounting base away from the vertical plate of the crossarm, with the axial direction of the tube body extending along the thickness direction of the horizontal plate of the crossarm.

[0009] Furthermore, the first mounting base includes a first base body, on which a limiting groove communicating with the outside of the first base body is provided, the limiting groove extending along the length direction of the first base body. The second mounting base includes a second base body and a limiting protrusion provided on the second base body, the limiting protrusion being able to enter the limiting groove, and the limiting protrusion engaging with the first base body in the thickness direction of the horizontal plate.

[0010] Furthermore, the first seat is also provided with a clearance groove that communicates with the outside of the first seat. The clearance groove communicates with the limiting groove so that the limiting protrusion enters the limiting groove through the clearance groove.

[0011] Furthermore, the surge arrester also includes a stop seat, which includes a third seat body and a stop protrusion disposed on the third seat body. The third seat body is detachably connected to the first seat body or the second seat body. The stop protrusion is located between the limiting protrusion and the groove wall of the relief groove to prevent the limiting protrusion from exiting the limiting groove.

[0012] Furthermore, the third base body is detachably connected to the second base body, and the surge arrester also includes a locking member, which is disposed on the third base body. The locking member has a locking position that engages with the second base body and a clearance position that avoids the second base body.

[0013] Furthermore, the locking element includes a locking plate, which is movably disposed on the third seat. The second seat has a locking groove on its side facing the third seat. When the locking element is in the locked position, a portion of the structure of the locking plate is located in the locking groove, so that the second seat restricts the movement of the third seat in the thickness direction of the transverse plate.

[0014] Furthermore, the third body is provided with a mounting groove, and the first end of the locking plate is rotatably disposed in the mounting groove. When the locking member is in the locked position, the second end of the locking plate moves into the locking groove. The surge arrester also includes an unlocking push plate, which is movably disposed in the mounting groove so that the locking plate moves from the locking groove to the mounting groove to switch to the avoidance position.

[0015] According to the technical solution of this invention, the surge arrester includes an arc-extinguishing tube and an operation indicator. The arc-extinguishing tube includes a tube body with a receiving space, and the arc-extinguishing medium is disposed within the receiving space. An opening communicating with the receiving space is provided at one end of the tube body, and the operation indicator is detachably disposed at the opening. The operation indicator includes an indicator head and a mounting post. A first end of the mounting post is connected to the indicator head, and a second end of the mounting post is inserted into the receiving space through the opening. The second end of the mounting post has a guide bevel. With the above configuration, when a lightning strike causes a short-circuit current to flow through the surge arrester, the arc-extinguishing medium inside the arc-extinguishing tube generates a large amount of arc-extinguishing gas at high temperature, which is ejected from the opening, thereby extinguishing the arc. When the arc-extinguishing gas is ejected from the opening, it can apply pressure to the mounting post, thereby allowing the mounting post to leave the opening, that is, the mounting post separates from the tube body. When the mounting post separates from the tube body, the guide ramp guides the flame, causing it to deflect away from the ramp. The mounting post moves in the opposite direction under the reaction force of the flame, thus preventing the flame from affecting the arc-extinguishing gas. This, in turn, prevents the arc-extinguishing gas from reducing the insulation of adjacent conductors and causing short-circuit faults. Therefore, the technical solution of this application effectively solves the problem in related technologies where the gas flow ejected by the surge arrester easily leads to reduced insulation of adjacent conductors and causes short-circuit faults. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0017] Figure 1 A three-dimensional structural schematic diagram of an embodiment of a surge arrester according to the present invention is shown;

[0018] Figure 2 It shows Figure 1 A front view schematic diagram of the arc-extinguishing tube of a surge arrester;

[0019] Figure 3 It shows Figure 2 A front view schematic diagram showing the operation indicator of the surge arrester separated from the arc extinguishing tube;

[0020] Figure 4 It shows Figure 1 A schematic diagram of the exploded structure of a surge arrester;

[0021] Figure 5 It shows Figure 1 A cross-sectional view of the surge arrester at its first position;

[0022] Figure 6 It shows Figure 1 A cross-sectional view of the second position of the surge arrester;

[0023] Figure 7It shows Figure 6 A schematic diagram of the exploded structure of a surge arrester;

[0024] Figure 8 It shows Figure 6 A three-dimensional structural diagram of the arrester when the stop plate separates from the second base body;

[0025] Figure 9 It shows Figure 1 A three-dimensional structural diagram of the first mounting base of the surge arrester;

[0026] Figure 10 It shows Figure 1 A three-dimensional structural diagram of the second mounting base of the surge arrester;

[0027] Figure 11 It shows Figure 1 A three-dimensional structural diagram of the stop seat of a surge arrester;

[0028] Figure 12 It shows Figure 11 A three-dimensional structural diagram of the stop seat from another perspective.

[0029] The above figures include the following reference numerals:

[0030] 1. Crossarm; 2. Horizontal plate; 3. Vertical plate; 4. Cable; 5. Flame; 10. Arc extinguishing tube; 11. Pipe body; 111. Indicator line; 20. Action indicator; 21. Indicator head; 22. Mounting post; 221. Guide slope; 23. Flexible connecting post; 24. Clearance post; 30. First mounting seat; 31. First seat body; 311. Limiting groove; 312. Clearance groove; 40. Second mounting seat; 41. Second seat body; 411. Locking groove; 42. Limiting protrusion; 50. Stop seat; 51. Third seat body; 511. Mounting groove; 52. Stopping protrusion; 60. Locking element; 61. Locking plate; 70. Unlocking push plate. Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] like Figures 1 to 3 As shown, the surge arrester of this embodiment includes an arc-extinguishing tube 10 and an operation indicator 20. The arc-extinguishing tube 10 includes a tube body 11 and an arc-extinguishing medium. The tube body 11 has a receiving space, and the arc-extinguishing medium is disposed in the receiving space. An opening is provided at the end of the tube body 11, and the opening communicates with the receiving space. The operation indicator 20 is detachably disposed at the opening. The operation indicator 20 includes an indicator head 21 and a mounting post 22. The first end of the mounting post 22 is connected to the indicator head 21, and the second end of the mounting post 22 is inserted into the receiving space through the opening. The second end of the mounting post 22 has a guide slope 221.

[0035] Using the technical solution of this embodiment, the surge arrester includes an arc-extinguishing tube 10 and an operation indicator 20. The arc-extinguishing tube 10 includes a tube body 11 with a receiving space, in which the arc-extinguishing medium is disposed. An opening communicating with the receiving space is provided at the end of the tube body 11, and the operation indicator 20 is detachably disposed at the opening. The operation indicator 20 includes an indicator head 21 and a mounting post 22. A first end of the mounting post 22 is connected to the indicator head 21, and a second end of the mounting post 22 is inserted into the receiving space through the opening. The second end of the mounting post 22 has a guide slope 221. With the above configuration, when a lightning strike causes a short-circuit current to flow through the surge arrester, the arc-extinguishing medium in the arc-extinguishing tube 10 generates a large amount of arc-extinguishing gas at high temperature, which is ejected from the opening, thereby extinguishing the arc. When the arc-extinguishing gas is ejected from the opening, it can apply pressure to the mounting post 22, thereby allowing the mounting post 22 to leave the opening, that is, the mounting post 22 separates from the tube body 11. When the mounting post 22 separates from the tube body 11, the guide slope 221 guides the flame 5, causing it to deflect away from the slope. The mounting post 22 moves in the opposite direction under the reaction force of the flame 5, thus preventing the flame 5 from affecting the arc-extinguishing gas. This, in turn, prevents the arc-extinguishing gas from reducing the insulation of adjacent conductors and causing a short circuit. Therefore, the technical solution of this embodiment effectively solves the problem in related technologies where the gas flow ejected by the surge arrester easily leads to reduced insulation of adjacent conductors and causes a short circuit.

[0036] It should be noted that the arc-extinguishing medium is the arc-extinguishing medium in the existing technology.

[0037] An indicator line 111 is provided on the outer surface of the tube body 11. The inclination direction of the guide slope 221 can be indicated by the indicator line 111, which makes it easy to determine the orientation of the guide slope 221 according to the indicator line 111, and facilitates the correct installation of the arc extinguishing tube 10.

[0038] The axial direction of the pipe body 11 is perpendicular to the axial direction of the cable 4.

[0039] When the arc extinguishing tube 10 sprays, the action indicator 20, which has just left the opening of the arc extinguishing tube 10, blocks the sprayed flame, causing the sprayed flame to surge back and the flame ball to become larger. This may cause some of the flame to touch the live wire adjacent to the cable 4. Since there are a large number of conductive particles in the flame 5, this may cause problems such as short circuit and tripping of the live wire.

[0040] An action indicator 20 may be provided at one end of the arc extinguishing tube 10, or an action indicator may be provided at both ends.

[0041] like Figure 3As shown, in this embodiment, the action indicator 20 further includes a flexible connecting post 23 disposed between the indicator head 21 and the mounting post 22. The diameter of the flexible connecting post 23 is larger than the diameter of the accommodating space. The flexible connecting post 23 can deform, which facilitates the installation of the action indicator 20 onto the tube body 11. The larger diameter of the flexible connecting post 23 than the diameter of the accommodating space creates an interference fit between the flexible connecting post 23 and the tube body 11, thereby making the connection between the flexible connecting post 23 and the tube body 11 more stable. Furthermore, the action indicator 20 can only separate from the tube body 11 under the pressure of gas generated inside the arc-extinguishing tube 10.

[0042] like Figure 3 As shown, in this embodiment, the action indicator 20 also includes a clearance post 24, which is connected between the connecting post and the indicator head 21. The diameter of the clearance post 24 is smaller than the diameter of the flexible connecting post 23. By setting the clearance post 24, the flexible connecting post 23 can deform more easily when inserted into the tube body 11, facilitating the connection between the flexible connecting post 23 and the tube body 11.

[0043] like Figure 1 As shown, in this embodiment, the surge arrester further includes a first mounting base 30 and a second mounting base 40 detachably connected to the first mounting base 30. The first mounting base 30 is disposed on the horizontal plate 2 of the crossarm 1, and the second mounting base 40 is disposed on the vertical plate 3 of the crossarm 1. The tube body 11 is disposed on the side of the first mounting base 30 away from the vertical plate 3 of the crossarm 1, and the axial direction of the tube body 11 extends along the thickness direction of the horizontal plate 2 of the crossarm 1. The first mounting base 30 and the second mounting base 40 can be detachably connected, which facilitates the installation of the tube body 11 onto the crossarm 1, thereby enabling the tube body 11 to be stably installed on the crossarm 1.

[0044] like Figure 1 , Figure 4 , Figure 9 as well as Figure 10 As shown, in this embodiment, the first mounting base 30 includes a first base body 31, on which a limiting groove 311 communicating with the outside of the first base body 31 is provided. The limiting groove 311 extends along the length direction of the first base body 31. The second mounting base 40 includes a second base body 41 and a limiting protrusion 42 provided on the second base body 41. The limiting protrusion 42 can enter the limiting groove 311, and the limiting protrusion 42 and the first base body 31 are engaged in a limiting fit in the thickness direction of the horizontal plate 2. The limiting protrusion 42 enters the limiting groove 311, so that the limiting protrusion 42 can be engaged in a limiting fit with the limiting groove 311, thereby enabling the first base body 31 and the second base body 41 to be engaged in a limiting fit in the thickness direction of the horizontal plate 2, preventing the first base body 31 and the second base body 41 from separating in the thickness direction of the horizontal plate 2.

[0045] It should be noted that a block is provided on the side of the first base 31 away from the vertical plate 3, and the tube 11 is inserted into the block.

[0046] like Figure 1 and Figure 8 As shown, in this embodiment, the first base 31 is further provided with a clearance groove 312 communicating with the outside of the first base 31. The clearance groove 312 communicates with the limiting groove 311 so that the limiting protrusion 42 enters the limiting groove 311 through the clearance groove 312. The limiting protrusion 42 can move from the outside of the first base 31 into the clearance groove 312, and then move through the clearance groove 312 into the limiting groove 311.

[0047] like Figure 6 and Figure 7 As shown, in this embodiment, the surge arrester also includes a stop seat 50, which includes a third seat body 51 and a stop protrusion 52 disposed on the third seat body 51. The third seat body 51 is detachably connected to the second seat body 41. The stop protrusion 52 is located between the limiting protrusion 42 and the groove wall of the relief groove 312 to prevent the limiting protrusion 42 from exiting the limiting groove 311. When the limiting protrusion 42 moves into the limiting groove 311 and engages with the first seat 31 in the thickness direction of the horizontal plate 2, part of the structure of the limiting protrusion 42 is located in the limiting groove 311 and part of the structure of the limiting protrusion 42 is located in the relief groove 312. The stop protrusion 52 can be inserted into the gap between the limiting protrusion 42 and the groove wall of the relief groove 312. This allows the limiting protrusion 42 to be limited in the length direction of the limiting protrusion 42, preventing the limiting protrusion 42 from exiting from the limiting groove 311 and affecting the limiting between the first seat 31 and the second seat 41.

[0048] In other embodiments, the third seat 51 is detachably connected to the first seat 31.

[0049] like Figures 4 to 6 , Figure 11 as well as Figure 12 As shown, in this embodiment, the third base 51 is detachably connected to the second base 41. The surge arrester also includes a locking member 60, which is disposed on the third base 51. The locking member 60 has a locking position that engages with the second base 41 and a clearance position that avoids the second base 41. When the locking member 60 engages with the second base 41, it can prevent the third base 51 from separating from the second base 41, thereby making the connection between the first mounting base 30, the second mounting base 40, and the stop base 50 more stable under the action of the locking member 60.

[0050] like Figures 5 to 7As shown, in this embodiment, the locking member 60 includes a locking plate 61, which is movably disposed on the third seat 51. A locking groove 411 is provided on the side of the second seat 41 facing the third seat 51. When the locking member 60 is in the locked position, a portion of the structure of the locking plate 61 is located within the locking groove 411, thereby restricting the movement of the third seat 51 in the thickness direction of the horizontal plate 2. When the locking plate 61 moves on the third seat 51, the locking member 60 can switch between a locked position and a clearance position. When the locking plate 61 is in the locked position, a portion of the structure of the locking plate 61 is located within the locking groove 411, thus restricting the movement of the third seat 51 in the thickness direction of the horizontal plate 2. That is, it prevents the second seat 41 and the third seat 51 from separating in the thickness direction of the horizontal plate 2, thereby allowing the stop protrusion 52 to be stably disposed between the limiting protrusion 42 and the groove wall of the clearance groove 312.

[0051] like Figures 6 to 8 As shown, in this embodiment, the third seat 51 is provided with a mounting groove 511. The first end of the locking plate 61 is rotatably disposed in the mounting groove 511. When the locking member 60 is in the locked position, the second end of the locking plate 61 moves into the locking groove 411. The surge arrester also includes an unlocking push plate 70, which is movably disposed in the mounting groove 511 so that the locking plate 61 moves from the locking groove 411 to the mounting groove 511 to switch to the avoidance position. When the locking plate 61 rotates, the second end of the locking plate 61 can move into the locking groove 411, thus enabling the locking plate 61 to limit the third seat 51 and prevent the third seat 51 and the second seat 41 from separating in the thickness direction of the horizontal plate 2.

[0052] It should be noted that the third seat 51 is also provided with an operating opening. The outer dimensions of the operating opening are smaller than those of the unlocking push plate 70, and the operating opening corresponds to the unlocking push plate 70. This allows the operator to push the unlocking push plate 70 through the operating opening, which in turn pushes the second end of the locking plate 61, causing the second end of the locking plate 61 to move from the locking groove 411 to the clearance groove 312. That is, the locking member 60 moves from the locking position to the clearance position, and the locking plate 61 no longer limits the movement of the third seat 51, allowing the third seat 51 to separate from the second seat 41.

[0053] In other embodiments, the locking plate 61 can move along the thickness direction of the vertical plate 3, that is, the locking plate 61 can move from being completely in the mounting groove 511 to having part of the structure in the mounting groove 511 and part of the structure in the locking groove 411, thereby limiting the position of the third seat 51.

[0054] The first base 31 is provided with a first opening groove that communicates with the outside of the first base 31. The first opening groove can avoid the horizontal plate 2, so that the first base 31 can be installed on the horizontal plate 2. The first opening groove and the avoidance groove are spaced apart in the thickness direction of the horizontal plate 2.

[0055] The second base 41 is provided with a second opening groove that communicates with the outside of the second base 41. The second opening groove can avoid the vertical plate 3, so that the second base 41 can be installed on the vertical plate 3.

[0056] The limiting groove 311 and the clearance groove 312 are connected in the length direction of the horizontal plate 2.

[0057] The distance between the two side walls of the locking groove 411 in the length direction of the horizontal plate 2 is greater than the distance between the two side walls of the mounting groove 511 in the length direction of the horizontal plate 2.

[0058] A through hole is also provided on the outer surface of the third seat 51. A column is connected to the first end of the locking plate 61 facing the through hole. The column extends out of the third seat 51, so that the locking plate 61 can be rotated through the column.

[0059] When the first mounting base 30 is installed on the horizontal plate 2, there is a gap between the first mounting base 30 and the vertical plate 3, and part of the structure of the second base 41 moves into the gap between the first mounting base 30 and the vertical plate 3.

[0060] The installation steps for the surge arrester in this embodiment are as follows:

[0061] (1) Move the first mounting base 30 along the thickness direction of the vertical plate 3 so that the first mounting base 30 is installed on the horizontal plate 2, that is, part of the structure of the horizontal plate 2 is located in the first opening groove.

[0062] (2) Move the second mounting base 40 along the thickness direction of the horizontal plate 2 so that the second mounting base 40 is installed on the vertical plate 3, that is, part of the structure of the vertical plate 3 is located in the second opening groove. During this process, the limiting protrusion 42 enters the clearance groove 312.

[0063] (3) Move the second mounting base 40 along the length direction parallel to the horizontal plate 2 so that the limiting protrusion 42 enters the limiting groove 311 from the clearance groove.

[0064] (4) Insert part of the structure of the stop seat 50 into the first mounting seat 30, that is, insert the stop convex plate 52 into the groove wall between the limiting convex plate 42 and the relief groove 312.

[0065] (5) Make the locking member 60 move so that the locking member 60 switches from the avoidance position to the locking position, that is, make the locking plate 61 move from the mounting groove 511 to the part of the structure of the locking plate 61 located in the locking groove 411.

[0066] The disassembly steps for the surge arrester in this embodiment are as follows:

[0067] (1) Push the unlocking push plate 70 to move the locking plate 61, so that part of the structure of the locking plate 61 moves from the locking groove 411 to the mounting groove 511, thereby allowing the third seat 51 to separate from the first seat 31.

[0068] (2) Move the second mounting base 40 along the direction parallel to the length of the horizontal plate 2 so that the limiting protrusion 42 enters the clearance groove 312 from the limiting groove 311.

[0069] (3) Move the second mounting base 40 along the thickness direction of the horizontal plate 2 so that the second mounting base 40 is separated from the vertical plate 3;

[0070] (4) Move the first mounting base 30 along the thickness direction of the vertical plate 3 so that the first mounting base 30 is separated from the horizontal plate 2.

[0071] The surge arrester in this embodiment has a simple and reliable structure, is easy to install, and includes an operation indicator 20. The surge arrester is installed on the crossarm 1 of the overhead power distribution line tower. The operation indicator 20 is inserted through the opening of the arc-extinguishing tube 10. When a lightning strike causes a short-circuit current to flow through the surge arrester, the arc-extinguishing medium inside the arc-extinguishing tube 10 generates a large amount of arc-extinguishing gas at high temperature, which is ejected from the opening end, thereby extinguishing the arc. During the arc extinguishing process, the operation indicator 20 will detach entirely along with the direction of the arc-extinguishing gas. After the arc is extinguished, the absence of the surge arrester's operation indicator can be observed from below the tower, thus indicating whether the surge arrester on the tower has been activated.

[0072] The main body of the action indicator 20 is made of an elastic material. The main body is divided into an indicator end (i.e., indicator head 21) and an insertion end (i.e., mounting post 22, flexible connecting post 23 and clearance post 24). The indicator end is a hemisphere, and the insertion end is a ring-shaped protrusion that is interference-fitted with the arc-extinguishing tube 10, so that the air pressure inside the arc-extinguishing tube 10 must reach a set threshold before it can be ejected.

[0073] The action indicator 20 operates based on the pressure of the arc-extinguishing gas flow. When a flashover occurs inside the arc-extinguishing tube 10, a large amount of gas is generated inside the arc-extinguishing tube 10, which simultaneously extinguishes the arc and blows out the action indicator. The flame ejected from the arc-extinguishing tube is deflected away from adjacent live conductors to avoid short-circuit tripping.

[0074] When the lightning current and power frequency follow current are relatively small, the initial gas generation velocity of the arc-extinguishing tube 10 is slow. The action indicator 20 can play a certain role in maintaining pressure, increasing the initial velocity of the arc-extinguishing gas flame at the opening of the arc-extinguishing tube 10, and improving the arc-extinguishing capability. When the lightning current and power frequency follow current are relatively large, after the arc-extinguishing gas blows the action indicator 20 out of the arc-extinguishing tube 10, the initial velocity of the action indicator 20 is relatively slow, which will cause the arc-blowing gas to diffuse outward and surge back, reducing the insulation strength during the arc-extinguishing process.

[0075] In this embodiment, an inclined surface (i.e., guide inclined surface 221) is added to the action indicator 20. The inclined surface faces away from the adjacent live wire. When the action indicator 20 is ejected from the arc extinguishing tube 10 with the flame, the action indicator 20 can deflect the flame to one side of the inclined surface due to the airflow guidance of the inclined surface. At the same time, the action indicator 20 quickly deflects to the opposite side under the reaction force, thereby avoiding the influence on the arc extinguishing airflow.

[0076] The indicator head 21 is made of rare earth long afterglow phosphorescent powder. After absorbing sunlight, it can continue to emit light for more than 8 hours. The processes of light absorption, light storage and light emission can be repeated and it can operate stably, so that it can be detected when there is insufficient light.

[0077] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0078] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0079] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0080] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

[0081] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0082] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0083] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A surge arrester, characterized in that, include: An arc-extinguishing tube (10) includes a tube body (11) and an arc-extinguishing medium. The tube body (11) has a receiving space, and the arc-extinguishing medium is disposed in the receiving space. An opening is provided at the end of the tube body (11), and the opening communicates with the receiving space. An action indicator (20) is detachably disposed at the opening. The action indicator (20) includes an indicator head (21) and a mounting post (22). The first end of the mounting post (22) is connected to the indicator head (21), and the second end of the mounting post (22) is inserted into the receiving space through the opening. The second end of the mounting post (22) has a guide slope (221). When the arc-extinguishing gas is ejected from the opening, the mounting post (22) separates from the tube body (11), and the guide slope (221) guides the flame, causing the flame to deflect away from the slope.

2. The surge arrester according to claim 1, characterized in that, The action indicator (20) also includes a flexible connecting post (23) disposed between the indicator head (21) and the mounting post (22), the diameter of the flexible connecting post (23) being larger than the diameter of the accommodating space.

3. The surge arrester according to claim 2, characterized in that, The motion indicator (20) also includes a clearance post (24) connected between the connecting post and the indicator head (21), and the diameter of the clearance post (24) is smaller than the diameter of the flexible connecting post (23).

4. The surge arrester according to any one of claims 1 to 3, characterized in that, The surge arrester also includes a first mounting base (30) and a second mounting base (40) detachably connected to the first mounting base (30). The first mounting base (30) is disposed on the horizontal plate (2) of the crossarm (1), and the second mounting base (40) is disposed on the vertical plate (3) of the crossarm (1). The tube body (11) is disposed on the side of the first mounting base (30) away from the vertical plate (3) of the crossarm (1), and the axial direction of the tube body (11) extends along the thickness direction of the horizontal plate (2) of the crossarm (1).

5. The surge arrester according to claim 4, characterized in that, The first mounting base (30) includes a first base body (31), on which a limiting groove (311) communicating with the outside of the first base body (31) is provided. The limiting groove (311) extends along the length direction of the first base body (31). The second mounting base (40) includes a second base body (41) and a limiting protrusion (42) provided on the second base body (41). The limiting protrusion (42) can enter the limiting groove (311). The limiting protrusion (42) and the first base body (31) are in a limiting engagement in the thickness direction of the horizontal plate (2).

6. The surge arrester according to claim 5, characterized in that, The first seat (31) is also provided with a clearance groove (312) that communicates with the outside of the first seat (31). The clearance groove (312) communicates with the limiting groove (311) so that the limiting protrusion (42) enters the limiting groove (311) through the clearance groove (312).

7. The surge arrester according to claim 6, characterized in that, The surge arrester also includes a stop seat (50), which includes a third seat body (51) and a stop protrusion (52) disposed on the third seat body (51). The third seat body (51) is detachably connected to the first seat body (31) or the second seat body (41). The stop protrusion (52) is located between the limiting protrusion (42) and the groove wall of the relief groove (312) to prevent the limiting protrusion (42) from exiting the limiting groove (311).

8. The surge arrester according to claim 7, characterized in that, The third base (51) is detachably connected to the second base (41), and the surge arrester also includes a locking member (60), which is disposed on the third base (51). The locking member (60) has a locking position that engages with the second base (41) and a clearance position that avoids the second base (41).

9. The surge arrester according to claim 8, characterized in that, The locking member (60) includes a locking plate (61), which is movably disposed on the third seat (51). The second seat (41) has a locking groove (411) on its side facing the third seat (51). When the locking member (60) is in the locked position, a portion of the structure of the locking plate (61) is located in the locking groove (411) so that the second seat (41) restricts the movement of the third seat (51) in the thickness direction of the horizontal plate (2).

10. The surge arrester according to claim 9, characterized in that, The third seat (51) is provided with a mounting groove (511). The first end of the locking plate (61) is rotatably disposed in the mounting groove (511). When the locking member (60) is in the locked position, the second end of the locking plate (61) moves into the locking groove (411). The surge arrester also includes an unlocking push plate (70). The unlocking push plate (70) is movably disposed in the mounting groove (511) so that the locking plate (61) moves from the locking groove (411) into the mounting groove (511) to switch to the avoidance position.

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