Lightning arrester

Abstract

The invention provides a lightning arrester, which comprises an arc extinguishing tube, the arc extinguishing tube comprises a tube body and an arc extinguishing medium, the tube body is internally provided with an accommodating space, the arc extinguishing medium is arranged in the accommodating space, the end part of the tube body is provided with an opening, and the opening is communicated with the accommodating space; the action indicator is separably arranged at the opening, the action indicator comprises an indicating head and a mounting column, the first end of the mounting column is connected with the indicating head, the second end of the mounting column is inserted into the accommodating space through the opening, and the second end of the mounting column is provided with a guide inclined plane. According to the technical scheme provided by the invention, the problem that the airflow sprayed by the lightning arrester in the related technology is easy to cause the insulation reduction of the adjacent wires to cause a short-circuit fault is effectively solved.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning protection equipment, in particular to a lightning arrester. Background Art

[0002] At present, most high-voltage distribution lines are laid overhead, which are prone to lightning strikes and external force damage during operation. Electric shock is also relatively frequent, causing serious economic losses and threatening personal safety. Insulation of overhead wires can reduce the risk of external force damage and electric shock. Some high-voltage overhead distribution lines have been insulated. However, insulated wires are prone to disconnection accidents when struck by lightning.

[0003] Lightning arresters using jet arc extinguishing technology can be applied to high-voltage overhead distribution lines. However, due to the small distance between lines, such as about 1 meter between 10kV lines, the jet airflow can easily cause the insulation of adjacent wires to decrease, resulting in short circuit faults. Summary of the invention

[0004] The main purpose of the present invention is to provide a lightning arrester to solve the problem in the related art that the airflow ejected by the lightning arrester easily leads to reduced insulation of adjacent wires, resulting in a short circuit fault.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a lightning arrester, comprising: an arc-extinguishing tube, the arc-extinguishing tube comprising a tube body and an arc-extinguishing medium, the tube body having a containing space, the arc-extinguishing medium being arranged in the containing space, an opening being arranged at the end of the tube body, and the opening being communicated with the containing space; an action indicator, the action indicator being detachably arranged at the opening, the action indicator comprising an indicating head and a mounting column, the first end of the mounting column being connected to the indicating head, the second end of the mounting column being inserted into the containing space through the opening, and the second end of the mounting column having a guiding inclined surface.

[0006] Furthermore, the action indicator further comprises a flexible connection column arranged between the indicator head and the mounting column, and a diameter of the flexible connection column is larger than a diameter of the accommodating space.

[0007] Furthermore, the action indicator also includes an avoidance column, which is connected between the connecting column and the indicator head, and the diameter of the avoidance column is smaller than the diameter of the flexible connecting column.

[0008] Furthermore, the lightning arrester also includes a first mounting seat and a second mounting seat detachably connected to the first mounting seat, the first mounting seat is arranged on the horizontal plate of the crossarm, the second mounting seat is arranged on the vertical plate of the crossarm, the tube body is arranged on the side of the first mounting seat away from the vertical plate of the crossarm, and the axial direction of the tube body extends along the thickness direction of the horizontal plate of the crossarm.

[0009] Furthermore, the first mounting seat includes a first seat body, on which is provided a limiting groove connected to the outside of the first seat body, and the limiting groove extends along the length direction of the first seat body. The second mounting seat includes a second seat body and a limiting protrusion arranged on the second seat body, and the limiting protrusion can enter the limiting groove, and the limiting protrusion cooperates with the first seat body in the thickness direction of the cross plate.

[0010] Furthermore, the first seat body is also provided with an avoidance groove which is in communication with the outside of the first seat body, and the avoidance groove is in communication with the limiting groove, so that the limiting protrusion plate enters the limiting groove through the avoidance groove.

[0011] Furthermore, the lightning arrester also includes a stop seat, which includes a third seat body and a stop protrusion arranged 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 avoidance groove to prevent the limiting protrusion from withdrawing from the limiting groove.

[0012] Furthermore, the third seat body is detachably connected to the second seat body, and the arrester also includes a locking member, which is arranged on the third seat body, and has a locking position for locking with the second seat body and a avoiding position for avoiding the second seat body.

[0013] Furthermore, the locking member includes a locking plate, which is movably arranged on the third seat body. A locking groove is arranged on the side of the second seat body facing the third seat body. When the locking member is in the locking position, part of the structure of the locking plate is located in the locking groove, so that the second seat body limits the movement of the third seat body in the thickness direction of the cross plate.

[0014] Furthermore, a mounting groove is provided on the third seat body, and the first end of the locking plate is rotatably arranged in the mounting groove. When the locking piece is in the locking position, the second end of the locking plate moves into the locking groove. The lightning arrester also includes an unlocking push plate, which is movably arranged 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] By applying the technical solution of the present invention, the lightning arrester includes an arc-extinguishing tube and an action indicator. The arc-extinguishing tube includes a tube body, the tube body has a containing space, and the arc-extinguishing medium is arranged in the containing space. An opening connected to the containing space is arranged at the end of the tube body, and the action indicator is detachably arranged at the opening. The action indicator includes an indicating head and a mounting column, the first end of the mounting column is connected to the indicating head, the second end of the mounting column is inserted into the containing space through the opening, and the second end of the mounting column has a guiding slope. Through the above-mentioned arrangement, when a lightning strike causes a line short-circuit current to flow through the lightning arrester, the arc-extinguishing medium in 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 column, and then the mounting column can leave the opening, that is, the mounting column is separated from the tube body. When the mounting post is separated from the tube body, under the action of the guiding slope, the guiding slope can guide the flame so that the flame deflects in the direction away from the slope, and the mounting post moves in the opposite direction under the reaction force of the flame, thereby avoiding the flame from affecting the arc extinguishing gas, thereby avoiding the arc extinguishing gas from causing the insulation of the adjacent wire to decrease, causing a short circuit fault. Therefore, the technical solution of the present application effectively solves the problem in the related art that the airflow ejected by the arrester easily causes the insulation of the adjacent wire to decrease, causing a short circuit fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

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

[0018] Figure 2 Shows Figure 1 A schematic diagram of the main view of the arc extinguishing tube of the lightning arrester;

[0019] Figure 3 Shows Figure 2 A schematic diagram of the main view of the arrester in which the action indicator is separated from the arc extinguishing tube;

[0020] Figure 4 Shows Figure 1 Schematic diagram of the exploded structure of the arrester;

[0021] Figure 5 Shows Figure 1 A schematic cross-sectional view of a first position of a lightning arrester;

[0022] Figure 6 Shows Figure 1 A schematic cross-sectional view of a second position of the arrester;

[0023] Figure 7Shows Figure 6 Schematic diagram of the exploded structure of the arrester;

[0024] Figure 8 Shows Figure 6 A schematic diagram of the three-dimensional structure of the arrester when the stop convex plate is separated from the second seat body;

[0025] Fig. 9 Shows Figure 1 A schematic diagram of the three-dimensional structure of a first mounting base of a lightning arrester;

[0026] Fig.10 Shows Figure 1 A schematic diagram of the three-dimensional structure of the second mounting base of the lightning arrester;

[0027] Fig.11 Shows Figure 1 A schematic diagram of the three-dimensional structure of the stopper of the arrester;

[0028] Fig.12 Shows Fig.11 A schematic diagram of the three-dimensional structure of the stop seat from another perspective.

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

[0030] 1. Cross arm; 2. Cross plate; 3. Vertical plate; 4. Cable; 5. Flame; 10. Arc extinguishing tube; 11. Tube body; 111. Indicator line; 20. Action indicator; 21. Indicator head; 22. Mounting column; 221. Guide slope; 23. Flexible connecting column; 24. Avoidance column; 30. First mounting seat; 31. First seat body; 311. Limiting groove; 312. Avoidance groove; 40. Second mounting seat; 41. Second seat body; 411. Locking groove; 42. Limiting convex plate; 50. Stop seat; 51. Third seat body; 511. Mounting groove; 52. Stop convex plate; 60. Locking piece; 61. Locking plate; 70. Unlocking push plate. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0033] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0034] like Figures 1 to 3 As shown, the lightning arrester of this embodiment includes: an arc extinguishing tube 10 and an action indicator 20. The arc extinguishing tube 10 includes a tube body 11 and an arc extinguishing medium. The tube body 11 has a containing space, and the arc extinguishing medium is arranged in the containing space. The end of the tube body 11 is provided with an opening, and the opening is connected to the containing space. The action indicator 20 is detachably arranged at the opening, and the action indicator 20 includes an indicating head 21 and a mounting column 22. The first end of the mounting column 22 is connected to the indicating head 21, and the second end of the mounting column 22 is inserted into the containing space through the opening. The second end of the mounting column 22 has a guiding inclined surface 221.

[0035] Applying the technical solution of this embodiment, the lightning arrester includes an arc extinguishing tube 10 and an action indicator 20. The arc extinguishing tube 10 includes a tube body 11, the tube body 11 has a storage space, and the arc extinguishing medium is arranged in the storage space. The end of the tube body 11 is provided with an opening connected to the storage space, and the action indicator 20 is detachably arranged at the opening. The action indicator 20 includes an indicator head 21 and a mounting column 22, the first end of the mounting column 22 is connected to the indicator head 21, the second end of the mounting column 22 is inserted into the storage space through the opening, and the second end of the mounting column 22 has a guide slope 221. Through the above-mentioned arrangement, when a lightning strike causes a line short-circuit current to flow through the lightning 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 column 22, and then the mounting column 22 can leave the opening, that is, the mounting column 22 is separated from the tube body 11. When the mounting post 22 is separated from the tube body 11, under the action of the guiding inclined surface 221, the guiding inclined surface 221 can guide the flame 5, so that the flame 5 deflects in the direction away from the inclined surface, and the mounting post 22 moves in the opposite direction under the reaction force of the flame 5, thereby avoiding the influence of the flame 5 on the arc extinguishing gas, thereby avoiding the arc extinguishing gas causing the insulation of the adjacent wires to be reduced, causing a short circuit fault. Therefore, the technical solution of this embodiment effectively solves the problem in the related art that the airflow ejected by the arrester easily causes the insulation of the adjacent wires to be reduced, causing a short circuit fault.

[0036] It should be noted that the arc extinguishing medium is the arc extinguishing medium in the prior art.

[0037] An indicator line 111 is provided on the outer surface of the tube body 11 , and the indicator line 111 can indicate the inclination direction of the guide slope 221 , so that the orientation of the guide slope 221 can be determined according to the indicator line 111 , thereby facilitating the correct installation of the arc-extinguishing tube 10 .

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

[0039] When the arc extinguishing tube 10 is in spraying action, the action indicator 20 that has just left the opening of the arc extinguishing tube 10 blocks the spray flame, causing the spray flame to surge back and the flame to become larger, resulting in part of the flame possibly touching the live wire adjacent to the cable 4. Due to the presence of a large number of conductive particles in the flame 5, problems such as short circuit and tripping of the live wire may be caused.

[0040] The arc-extinguishing tube 10 may be provided with an action indicator 20 at one end or at both ends.

[0041] like Figure 3As shown, in this embodiment, the action indicator 20 further includes a flexible connection column 23 disposed between the indicator head 21 and the mounting column 22, and the diameter of the flexible connection column 23 is larger than the diameter of the accommodation space. The flexible connection column 23 can be deformed, so that it is convenient to install the action indicator 20 to the tube body 11. The diameter of the flexible connection column 23 is larger than the diameter of the accommodation space, so that an interference connection is formed between the flexible connection column 23 and the tube body 11, thereby making the connection between the flexible connection column 23 and the tube body 11 more stable, and also making it possible for the action indicator 20 to be separated from the tube body 11 only when gas is generated in the arc extinguishing tube 10 under the pressure of the gas.

[0042] like Figure 3 As shown, in this embodiment, the action indicator 20 further includes an avoidance column 24, which is connected between the connecting column and the indicator head 21, and the diameter of the avoidance column 24 is smaller than the diameter of the flexible connecting column 23. By providing the avoidance column 24, when the flexible connecting column 23 is inserted into the tube body 11, the flexible connecting column 23 can be deformed more easily, which facilitates the connection between the flexible connecting column 23 and the tube body 11.

[0043] like Figure 1 As shown, in this embodiment, the arrester further includes a first mounting seat 30 and a second mounting seat 40 detachably connected to the first mounting seat 30, the first mounting seat 30 is arranged on the horizontal plate 2 of the crossarm 1, the second mounting seat 40 is arranged on the vertical plate 3 of the crossarm 1, the tube body 11 is arranged on the side of the first mounting seat 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 seat 30 and the second mounting seat 40 can be detachably connected, which facilitates the installation of the tube body 11 to the crossarm 1, and thus enables the tube body 11 to be stably installed on the crossarm 1.

[0044] like Figure 1 , Figure 4 , Fig. 9 as well as Fig.10 As shown, in this embodiment, the first mounting seat 30 includes a first seat body 31, and the first seat body 31 is provided with a limiting groove 311 that is connected to the outside of the first seat body 31, and the limiting groove 311 extends along the length direction of the first seat body 31. The second mounting seat 40 includes a second seat body 41 and a limiting convex plate 42 provided on the second seat body 41, and the limiting convex plate 42 can enter the limiting groove 311, and the limiting convex plate 42 and the first seat body 31 are limited in the thickness direction of the transverse plate 2. The limiting convex plate 42 enters the limiting groove 311, so that the limiting convex plate 42 can be limited in the limiting groove 311, and then the first seat body 31 and the second seat body 41 can be limited in the thickness direction of the transverse plate 2. Separation of the first seat body 31 and the second seat body 41 in the thickness direction of the transverse plate 2 is avoided.

[0045] It should be noted that a block is provided on one side of the first seat body 31 away from the vertical plate 3 , and the tube body 11 is passed through the block.

[0046] like Figure 1 and Figure 8 As shown, in this embodiment, the first seat body 31 is further provided with an avoidance groove 312 communicating with the outside of the first seat body 31, and the avoidance groove 312 is communicated with the limiting groove 311, so that the limiting convex plate 42 enters the limiting groove 311 through the avoidance groove 312. The limiting convex plate 42 can move from the outside of the first seat body 31 to the avoidance groove 312, and move to the limiting groove 311 through the avoidance groove 312.

[0047] like Figure 6 and Figure 7 As shown, in this embodiment, the lightning arrester also includes a stop seat 50, which includes a third seat body 51 and a stop protrusion 52 arranged on the third seat body 51, and the third seat body 51 is detachably connected to the second seat body 41, and the stop protrusion 52 is located between the limiting protrusion 42 and the groove wall of the avoidance groove 312 to prevent the limiting protrusion 42 from withdrawing from the limiting groove 311. When the limiting protrusion 42 moves into the limiting groove 311 and cooperates with the first seat body 31 in the upper limit direction of the thickness direction of the cross 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 avoidance groove 312. The stop protrusion 52 can be inserted into the gap between the limiting protrusion 42 and the groove wall of the avoidance groove 312. In this way, the limiting protrusion 42 can be limited in the length direction of the limiting protrusion 42, thereby avoiding the limiting protrusion 42 from withdrawing from the limiting groove 311 and affecting the limitation between the first seat body 31 and the second seat body 41.

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

[0049] like Figures 4 to 6 , Fig.11 as well as Fig.12 As shown, in this embodiment, the third seat body 51 is detachably connected to the second seat body 41, and the arrester further comprises a locking member 60, which is arranged on the third seat body 51, and the locking member 60 has a locking position for locking with the second seat body 41 and a avoiding position for avoiding the second seat body 41. When the locking member 60 is locked with the second seat body 41, the third seat body 51 can be prevented from being separated from the second seat body 41, so that under the action of the locking member 60, the connection between the first mounting seat 30, the second mounting seat 40 and the stop seat 50 is more stable.

[0050] like Figures 5 to 7As shown, in this embodiment, the locking member 60 includes a locking plate 61, which is movably arranged on the third seat body 51, and a locking groove 411 is arranged on the side of the second seat body 41 facing the third seat body 51. When the locking member 60 is in the locking position, part of the structure of the locking plate 61 is located in the locking groove 411, so that the second seat body 41 limits the movement of the third seat body 51 in the thickness direction of the transverse plate 2. When the locking plate 61 moves on the third seat body 51, the locking member 60 can switch between the locking position and the avoidance position. When the locking plate 61 is in the locking position, part of the structure of the locking plate 61 is located in the locking groove 411, so that the second seat body 41 can limit the movement of the third seat body 51 in the thickness direction of the transverse plate 2, that is, the second seat body 41 and the third seat body 51 are prevented from separating in the thickness direction of the transverse plate 2, so that the stop convex plate 52 can be stably arranged between the limiting convex plate 42 and the groove wall of the avoidance groove 312.

[0051] like Figures 6 to 8 As shown, in this embodiment, the third seat body 51 is provided with a mounting groove 511, the first end of the locking plate 61 is rotatably disposed in the mounting groove 511, and when the locking member 60 is in the locked position, the second end of the locking plate 61 moves into the locking groove 411, and the arrester further comprises 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, so that the locking plate 61 can limit the third seat body 51, and prevent the third seat body 51 and the second seat body 41 from being separated in the thickness direction of the transverse plate 2.

[0052] It should be noted that an operation opening is also provided on the third seat body 51, and the outer dimensions of the operation opening are smaller than the outer dimensions of the unlocking push plate 70, and the operation opening is provided corresponding to the unlocking push plate 70. In this way, the operator can push the unlocking push plate 70 to move through the operation opening, and then the unlocking push plate 70 can push the second end of the locking plate 61, so that the second end of the locking plate 61 moves from the locking groove 411 to the avoidance groove 312, that is, the locking member 60 moves from the locking position to the avoidance position, and the locking plate 61 no longer limits the movement of the third seat body 51, so that the third seat body 51 and the second seat body 41 can be separated.

[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 installation groove 511 to partially being in the installation groove 511 and partially being in the locking groove 411, thereby limiting the third seat body 51.

[0054] The first seat body 31 is provided with a first opening groove communicating with the outside of the first seat body 31, and the first opening groove can avoid the transverse plate 2, so that the first seat body 31 can be installed on the transverse plate 2. The first opening groove and the avoiding groove are spaced apart in the thickness direction of the transverse plate 2.

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

[0056] The limiting groove 311 and the avoiding groove 312 are connected and arranged in the length direction of the transverse plate 2 .

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

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

[0059] When the first mounting seat 30 is mounted to the transverse plate 2 , there is a gap between the first mounting seat 30 and the vertical plate 3 , and a part of the structure of the second seat body 41 moves into the gap between the first mounting seat 30 and the vertical plate 3 .

[0060] The installation steps of the lightning arrester of this embodiment are as follows:

[0061] (1) Move the first mounting seat 30 along the thickness direction of the vertical plate 3 so that the first mounting seat 30 is mounted 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 seat 40 along the thickness direction of the horizontal plate 2 so that the second mounting seat 40 is mounted 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 avoidance groove 312;

[0063] (3) Move the second mounting seat 40 in a direction parallel to the length direction of the horizontal plate 2 so that the limiting protrusion 42 enters the limiting groove 311 from the avoidance groove;

[0064] (4) Insert a portion of the structure of the stop seat 50 into the first mounting seat 30, that is, insert the stop protrusion 52 between the limiting protrusion 42 and the groove wall of the avoidance groove 312;

[0065] (5) The locking member 60 is moved so as to switch from the avoidance position to the locking position, that is, the locking plate 61 is moved from the installation groove 511 to a position where part of the structure of the locking plate 61 is located in the locking groove 411.

[0066] The steps for disassembling the arrester of this embodiment are as follows:

[0067] (1) Pushing the unlocking push plate 70, so that the unlocking push plate 70 drives the locking plate 61 to move, so that part of the structure of the locking plate 61 moves from the locking groove 411 to the installation groove 511, thereby enabling the third seat body 51 to be separated from the first seat body 31;

[0068] (2) Move the second mounting seat 40 in a direction parallel to the length direction of the horizontal plate 2 so that the limiting protrusion 42 enters the avoidance groove 312 from the limiting groove 311;

[0069] (3) Move the second mounting seat 40 along the thickness direction of the horizontal plate 2 to separate the second mounting seat 40 from the vertical plate 3;

[0070] (4) Move the first mounting seat 30 along the thickness direction of the vertical plate 3 to separate the first mounting seat 30 from the horizontal plate 2.

[0071] The arrester of this embodiment has a simple and reliable structure, is easy to install, and is equipped with an action indicator 20. The arrester is installed on the cross arm 1 of the overhead distribution line tower. The action indicator 20 is inserted from the opening of the arc extinguishing tube 10. When a lightning strike causes a line short-circuit current to flow through the 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 open end, thereby extinguishing the arc. During the arc extinguishing process, the action indicator 20 will fall off as a whole in the direction of the arc blowing gas. After the arc is extinguished, the absence of the arrester action indicator can be observed from under the tower, thereby distinguishing whether the arrester on the tower has been actuated.

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

[0073] The action indicator 20 is actuated by the pressure of the arc extinguishing gas flow. When the arc extinguishing tube 10 flashes over, a large amount of gas is generated in the arc extinguishing tube 10, and the action indicator is blown out while the arc is extinguished. The flame ejected by the arc extinguishing tube deviates from the adjacent live wires to avoid short circuit tripping.

[0074] When the lightning current and the power frequency continuous current are small, the initial gas production speed of the arc extinguishing tube 10 is slow, and the action indicator 20 can play a certain role in maintaining pressure, increase the initial velocity of the arc extinguishing gas flow flame at the opening of the arc extinguishing tube 10, and improve the arc extinguishing ability. When the lightning current and the power frequency continuous current are large, after the arc extinguishing gas flow blows the action indicator 20 out of the arc extinguishing tube 10, due to the slow initial velocity of the action indicator 20, the arc blowing gas flow will diffuse outward and surge back, reducing the insulation strength during the arc extinguishing process.

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

[0076] The material of the indicator head 21 is mixed with rare earth long afterglow luminous powder. After absorbing light under sunlight, it can continue to glow for more than 8 hours. The process of absorbing light, storing light and emitting light can be repeated and run stably, so that it can be discovered when there is insufficient light.

[0077] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0079] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

[0081] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

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

[0083] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0084] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A lightning arrester, characterized in that: include: An arc-extinguishing tube (10), the arc-extinguishing tube (10) comprising a tube body (11) and an arc-extinguishing medium, the tube body (11) having a containing space therein, the arc-extinguishing medium being arranged in the containing space, an opening being arranged at an end of the tube body (11), the opening being in communication with the containing space; An action indicator (20) is detachably arranged at the opening, the action indicator (20) comprising an indicator head (21) and a mounting column (22), a first end of the mounting column (22) being connected to the indicator head (21), a second end of the mounting column (22) being inserted into the accommodating space through the opening, and the second end of the mounting column (22) having a guiding inclined surface (221).

2. The lightning arrester according to claim 1, characterized in that: The action indicator (20) further comprises a flexible connection column (23) arranged between the indicator head (21) and the mounting column (22), wherein the diameter of the flexible connection column (23) is greater than the diameter of the accommodating space.

3. The lightning arrester according to claim 2, characterized in that: The action indicator (20) further comprises an avoidance column (24), wherein the avoidance column (24) is connected between the connecting column and the indicating head (21), and the diameter of the avoidance column (24) is smaller than the diameter of the flexible connecting column (23).

4. The arrester according to any one of claims 1 to 3, characterized in that: The lightning arrester also includes a first mounting seat (30) and a second mounting seat (40) detachably connected to the first mounting seat (30), the first mounting seat (30) being arranged on the horizontal plate (2) of the cross arm (1), the second mounting seat (40) being arranged on the vertical plate (3) of the cross arm (1), the tube body (11) being arranged on a side of the first mounting seat (30) away from the vertical plate (3) of the cross arm (1), and the axial direction of the tube body (11) extending along the thickness direction of the horizontal plate (2) of the cross arm (1).

5. The lightning arrester according to claim 4, characterized in that: The first mounting seat (30) comprises a first seat body (31), the first seat body (31) is provided with a limiting groove (311) connected to the outside of the first seat body (31), and the limiting groove (311) extends along the length direction of the first seat body (31); the second mounting seat (40) comprises a second seat body (41) and a limiting protrusion (42) provided on the second seat body (41), the limiting protrusion (42) can enter the limiting groove (311), and the limiting protrusion (42) cooperates with the first seat body (31) in the upper limit direction of the thickness of the transverse plate (2).

6. The arrester according to claim 5, characterized in that: The first seat body (31) is also provided with an avoidance groove (312) which is in communication with the outside of the first seat body (31), and the avoidance groove (312) is in communication with the limiting groove (311), so that the limiting convex plate (42) enters the limiting groove (311) through the avoidance groove (312).

7. The arrester according to claim 6, characterized in that: The lightning arrester also includes a stop seat (50), the stop seat (50) includes a third seat body (51) and a stop convex plate (52) arranged 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), and the stop convex plate (52) is located between the limiting convex plate (42) and the groove wall of the avoidance groove (312) to prevent the limiting convex plate (42) from withdrawing from the limiting groove (311).

8. The arrester according to claim 7, characterized in that: The third base body (51) is detachably connected to the second base body (41), and the lightning arrester also includes a locking piece (60). The locking piece (60) is arranged on the third base body (51), and the locking piece (60) has a locking position for locking with the second base body (41) and a avoiding position for avoiding the second base body (41).

9. The lightning arrester according to claim 8, characterized in that: The locking member (60) comprises a locking plate (61), and the locking plate (61) is movably arranged on the third seat body (51). A locking groove (411) is arranged on the side of the second seat body (41) facing the third seat body (51). When the locking member (60) is in the locking position, a part of the structure of the locking plate (61) is located in the locking groove (411), so that the second seat body (41) limits the movement of the third seat body (51) in the thickness direction of the transverse plate (2).

10. The lightning arrester according to claim 9, characterized in that: The third seat body (51) is provided with a mounting groove (511), and the first end of the locking plate (61) is rotatably arranged in the mounting groove (511). When the locking member (60) is in the locking position, the second end of the locking plate (61) moves into the locking groove (411). The lightning arrester also includes an unlocking push plate (70), and the unlocking push plate (70) is movably arranged 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.

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