Line lightning arrester capable of preventing multiple lightning strokes

Abstract

The invention discloses a line lightning arrester capable of preventing multiple lightning strokes, which comprises a mounting seat, and is characterized in that the line lightning arrester comprises an insulating jacket arranged at one end of the mounting seat, and a zinc oxide resistor disc is arranged in the insulating jacket; the pressure relief disc penetrates through the insulating outer sleeve and is fixedly connected with the insulating outer sleeve, a mounting groove and a first ventilation opening are formed in the pressure relief disc, and the first ventilation opening and the mounting groove are arranged in a penetrating mode; and the pressure relief seat is arranged in the mounting groove, a pressure relief cylinder is arranged on the pressure relief seat, a second ventilation opening is formed in the pressure relief seat, and the second ventilation opening is communicated with the pressure relief cylinder. Through arrangement of the pressure relief disc, the pressure relief seat and the pressure relief cylinder, the pressure relief disc, the pressure relief seat and the pressure relief cylinder are communicated with the space in the insulating jacket, so that the pressure in the insulating jacket can be released, damage caused by internal pressure increase after the lightning arrester is subjected to multiple lightning strokes is avoided, the service life of the line lightning arrester is prolonged, and the use safety of the line lightning arrester is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of line arresters, in particular to a line arrester capable of preventing multiple lightning strikes. BACKGROUND

[0002] A line arrester is a device used to protect power lines and related equipment from lightning overvoltage and operating overvoltage damage. When the line arrester is in normal operation, it presents a high impedance state, and only a small leakage current passes through. When lightning or operating overvoltage occurs, the voltage exceeds the action threshold, and the arrester quickly changes to a low impedance state, leading the large current generated by the overvoltage to the ground, limiting the voltage amplitude on the line and protecting the line and connected equipment. After the overvoltage disappears, it returns to a high impedance state, without affecting the normal operation of the line.

[0003] According to statistics, 28% of lightning strikes in southern China are multiple lightning strikes, and the total number of lightning strikes can reach more than 10 times. Multiple lightning strikes have led to many substation equipment failure events due to their short time interval and high frequency, including circuit breakers, arresters and other main equipment. In general, a single lightning strike cannot damage the arrester, but multiple lightning strikes in a short period of time can easily cause the arrester to absorb more energy than its 2ms square wave current capacity. In addition, for line side arresters, when lightning causes the circuit breaker to trip, if the subsequent lightning strikes the transmission line, the line side arrester is affected by the lightning wave and the reflected wave, and the arrester absorbs more energy after the two are superimposed, and a certain amount of energy passes through the arrester each time the lightning strikes.

[0004] Although the arrester can withstand a certain amount of lightning strike during design, the cumulative energy of multiple lightning strikes can cause the internal temperature of the arrester to rise, causing the internal gas to expand and the pressure to increase, thereby easily causing damage to the line arrester. SUMMARY

[0005] The present application aims to at least solve one of the problems in the prior art or related art.

[0006] In view of this, the present application provides a line arrester capable of preventing multiple lightning strikes, wherein the space in the insulating outer sleeve is communicated through the setting of the pressure release disc, the pressure release seat and the pressure release cylinder, so that the pressure in the insulating outer sleeve can be released, avoiding damage caused by the increase in internal pressure after the arrester is subjected to multiple lightning strikes, and improving the service life and safety of the line arrester.

[0007] Specifically, the technical scheme comprises the following:

[0008] The present application provides a line arrester capable of preventing multiple lightning strikes, comprising a mounting seat, wherein the line arrester comprises:

[0009] An insulating sheath is arranged at one end of the mounting base, and a zinc oxide resistor is arranged in the insulating sheath.

[0010] A pressure relief disc is arranged through the insulating sheath, and the pressure relief disc is fixedly connected with the insulating sheath, and a mounting groove and a first air passage are arranged in the pressure relief disc, and the first air passage is arranged through the mounting groove.

[0011] A pressure relief base is arranged in the mounting groove, and a pressure relief cylinder is arranged on the pressure relief base, and a second air passage is arranged on the pressure relief base, and the second air passage is in communication with the pressure relief cylinder.

[0012] Optionally, the line lightning arrester further comprises:

[0013] A mounting mechanism is arranged between the mounting groove and the pressure relief base, and the mounting mechanism is configured to connect the pressure relief disc and the pressure relief base.

[0014] A sealing mechanism is arranged in the pressure relief cylinder, and the sealing mechanism is configured to seal the pressure relief cylinder.

[0015] Optionally, a first sealing groove is arranged at one end of the mounting groove away from the pressure relief cylinder, and the first sealing groove is arranged above the first air passage, and a sealing ring is arranged at one end of the pressure relief base facing the pressure relief disc, and one end of the sealing ring facing the pressure relief disc is arranged flush with one end of the second air passage facing the pressure relief disc, and a first sealing ring is further arranged at one end of the sealing ring facing the pressure relief disc, and the first sealing ring is in abutment with the first sealing groove.

[0016] Optionally, the sealing mechanism comprises:

[0017] An annular groove is arranged on the inner wall of the pressure relief cylinder, and a sealing disc is slidably arranged in the annular groove.

[0018] A first support pipe and a second support pipe are respectively arranged at two ends of the sealing disc in the axial direction, and one end of the first support pipe and the second support pipe away from the sealing disc is slidably connected with the inner wall of the pressure relief cylinder, and a plurality of support openings are respectively arranged on the side walls of the first support pipe and the second support pipe.

[0019] A U-shaped pipe is arranged at least partially in the annular groove, and the open end of the U-shaped pipe faces the direction of the pressure relief cylinder.

[0020] A second sealing ring is arranged on the side of the sealing disc facing the pressure relief disc, and the second sealing ring is sleeved on the first support pipe.

[0021] A reset spring is arranged on the second support pipe, one end of the reset spring is connected with the sealing disc, and the other end of the reset spring is connected with the side of the annular groove away from the pressure relief disc.

[0022] Optionally, the mounting mechanism comprises:

[0023] A first positioning groove is arranged on the inner wall of the mounting groove, and the first positioning groove is annular.

[0024] A first cavity is arranged in the pressure relief seat, a first positioning opening is arranged on the corresponding pressure relief seat of the first cavity, and the first positioning opening corresponds to the first positioning groove.

[0025] A positioning ring is slidingly arranged in the first cavity.

[0026] A positioning mechanism is arranged between the positioning ring and the first positioning groove, and the positioning mechanism is configured to position the positioning ring and the first positioning groove.

[0027] A position adjusting mechanism is arranged between the positioning ring and the pressure relief seat, and the position adjusting mechanism is configured to adjust the position of the positioning ring in the first cavity.

[0028] Optionally, the positioning mechanism comprises:

[0029] A pair of second cavities are symmetrically arranged in the positioning ring, a second positioning opening is arranged on the side wall of the second cavity, and the second positioning opening is arranged correspondingly to the first positioning opening.

[0030] A first gear is rotatably arranged in the second cavity, a positioning block is arranged on the first gear, the positioning block penetrates the second positioning opening and the first positioning opening in sequence, and the positioning block is clamped in the first positioning groove.

[0031] A third cavity is arranged in the positioning ring, and the third cavity is located at the center of the positioning ring. A pair of second cavities are symmetrically arranged relative to the third cavity, and the third cavity is in communication with the second cavities. A first gear ring is rotatably connected in the third cavity, and the first gear ring is engaged with the first gear.

[0032] A first driving mechanism is arranged in the first cavity, and the first driving mechanism is configured to drive the first gear to rotate.

[0033] Optionally, the first driving mechanism comprises:

[0034] A driving prism penetrates the pressure relief seat towards the side of the pressure relief cylinder, the positioning ring and the first gear in sequence, and the driving prism is connected with the first gear.

[0035] A first hexagonal head is fixedly connected with the driving prism, and the first hexagonal head is located outside the pressure relief seat.

[0036] Optionally, the position adjusting structure comprises:

[0037] A first threaded rod is arranged in the first cavity, and the first threaded rod is threadedly connected with the positioning ring.

[0038] A second gear is arranged in the first cavity, and the second gear is fixedly connected with the first threaded rod.

[0039] A second driving mechanism is arranged on the pressure relief seat, and the second driving mechanism is configured to drive a pair of the first threaded rods to synchronously rotate.

[0040] Optionally, the second driving mechanism comprises:

[0041] A second gear ring is arranged in the first cavity, and the second gear ring is engaged with the second gear.

[0042] A second hexagonal head is arranged on one of the first threaded rods, and the second hexagonal head is located outside the pressure relief seat.

[0043] Optionally, the line arrester further comprises:

[0044] A terminal is arranged at both ends of the length direction of the insulating sleeve, and the terminal is electrically connected with the zinc oxide varistor.

[0045] The line arrester for preventing multiple lightning strikes provided by the embodiment of the application, wherein the line arrester comprises an insulating sleeve arranged at one end of a mounting seat, a zinc oxide varistor arranged in the insulating sleeve, a pressure relief disc penetratingly connected to the insulating sleeve, a mounting groove and a first air passage arranged in the pressure relief disc, a pressure relief seat arranged in the mounting groove, a pressure relief cylinder connected to the pressure relief seat, a second air passage arranged on the pressure relief seat, and the first air passage, the second air passage and the pressure relief cylinder being communicated. When the line is subjected to multiple lightning strikes, the pressure in the insulating sleeve is increased, and the pressure in the insulating sleeve can drive the components in the pressure relief cylinder to rotate, so as to communicate the insulating sleeve with the external environment, thereby releasing the pressure in the insulating sleeve, avoiding damage of the line arrester due to the increase of the internal pressure after the line arrester is subjected to multiple lightning strikes, and further improving the safety and reliability of the line arrester.

[0046] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clearly understood and implemented according to the content of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application will be described. BRIEF DESCRIPTION OF DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0048] Figure 1 Schematic diagram of a line arrester for preventing multiple lightning strikes according to an embodiment of the present application;

[0049] Figure 2 Schematic diagram of a line arrester for preventing multiple lightning strikes according to an embodiment of the present application from another angle;

[0050] Figure 3 Schematic diagram of the inside of an insulation jacket according to an embodiment of the present application;

[0051] Figure 4 Exploded schematic diagram of a pressure release disc and a pressure release seat according to an embodiment of the present application;

[0052] Figure 5 Schematic diagram of a mounting mechanism according to an embodiment of the present application;

[0053] Figure 6 Schematic diagram of a positioning mechanism according to an embodiment of the present application;

[0054] Figure 7 Schematic diagram of a position adjusting mechanism according to an embodiment of the present application.

[0055] Wherein, Figures 1 to 7 The correspondence between the reference signs and the component names in the drawings is as follows:

[0056] 1mounting seat, 2insulating sleeve, 3zinc oxide resistor, 4terminal, 5pressure relief disc, 6mounting groove, 7first air vent, 8pressure relief seat, 9pressure relief cylinder, 10second air vent, 11first sealing groove, 12sealing ring, 13first sealing ring, 14annular groove, 15sealing disc, 16first support tube, 17second support tube, 18U-shaped tube, 19return spring, 20first positioning groove, 21first positioning port, 22positioning ring, 23second positioning port, 24first gear, 25positioning block, 26first toothed ring, 27driving prism, 28first inner hexagonal bolt head, 29first threaded rod, 30second gear, 31second toothed ring, 32second inner hexagonal bolt head. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0058] Before the embodiments of the present application are described in further detail, the orientation terms such as "upper", "lower", "side" in the embodiments of the present application do not have the meaning of limiting the scope of protection of the present application.

[0059] In order to make the technical solutions and advantages of the present application clearer, the embodiments of the present application will be described in further detail below with reference to the drawings.

[0060] Figure 1 A schematic view of a line arrester for preventing multiple lightning strikes according to an embodiment of the present application; Figure 2 Another angle schematic view of a line arrester for preventing multiple lightning strikes according to an embodiment of the present application; Figure 4 An exploded schematic view of a pressure relief disc and a pressure relief seat according to an embodiment of the present application.

[0061] As shown in FIGS. Figure 1 , Figure 2 and Figure 4 An embodiment of the present application provides a line arrester for preventing multiple lightning strikes, which comprises a mounting seat 1, and the line arrester comprises:

[0062] An insulating sleeve 2 is arranged at one end of the mounting seat 1, and the insulating sleeve 2 is internally provided with a zinc oxide resistor 3;

[0063] A pressure relief disc 5 penetrates the insulating sleeve 2, and the pressure relief disc 5 is fixedly connected with the insulating sleeve 2, and the pressure relief disc 5 is internally provided with a mounting groove 6 and a first air vent 7, and the first air vent 7 is arranged through the mounting groove 6;

[0064] The pressure relief seat 8 is arranged in the mounting groove 6, and the pressure relief seat 8 is provided with a pressure relief cylinder 9. The pressure relief seat 8 is provided with a second air vent 10, and the second air vent 10 is in communication with the pressure relief cylinder 9.

[0065] The line arrester includes an insulating sleeve 2 arranged at one end of the mounting seat 1, a zinc oxide resistance sheet 3 arranged in the insulating sleeve 2, a pressure relief disc 5 connected through the insulating sleeve 2, a mounting groove 6 and a first air vent 7 arranged in the pressure relief disc 5, a pressure relief seat 8 arranged in the mounting groove 6, a pressure relief cylinder 9 connected to the pressure relief seat 8, a second air vent 10 arranged on the pressure relief seat 8, and the first air vent 7, the second air vent 10 and the pressure relief cylinder 9 being in communication. When the line is subjected to multiple lightning strikes, the pressure in the insulating sleeve 2 is increased, and the pressure in the insulating sleeve 2 can drive the components in the pressure relief cylinder 9 to rotate, so as to connect the insulating sleeve 2 with the external environment, thereby releasing the pressure in the insulating sleeve 2, avoiding damage of the line arrester due to the increase of the internal pressure after the line arrester is subjected to multiple lightning strikes, and further improving the safety and reliability of the line arrester.

[0066] In a feasible implementation, the line arrester further includes:

[0067] A mounting mechanism arranged between the mounting groove 6 and the pressure relief seat 8, and configured to connect the pressure relief disc 5 and the pressure relief seat 8.

[0068] A sealing mechanism arranged in the pressure relief cylinder 9, and configured to seal the pressure relief cylinder 9.

[0069] The mounting mechanism is configured to connect the pressure relief seat 8 and the pressure relief disc 5, and the sealing mechanism is configured to seal the pressure relief cylinder 9, thereby improving the sealing performance of the pressure relief cylinder 9 and avoiding impurities or water vapor in the external environment from entering the insulating sleeve 2, which affects the normal operation of the line arrester.

[0070] In a feasible implementation, the mounting groove 6 is provided with a first sealing groove 11 at an end away from the pressure relief cylinder 9, the first sealing groove 11 is located above the first air vent 7, the pressure relief seat 8 is provided with a sealing ring 12 at an end facing the pressure relief disc 5, the end of the sealing ring 12 facing the pressure relief disc 5 is flush with an end of the second air vent 10 facing the pressure relief disc 5, and the end of the sealing ring 12 facing the pressure relief disc 5 is further provided with a first sealing ring 13, and the first sealing ring 13 abuts against the first sealing groove 11.

[0071] The sealing connection of the pressure relief disc 5 and the pressure relief seat 8 is realized by the first sealing ring 13, so that the pressure in the insulation outer sleeve 2 cannot enter the pressure relief disc 5, and the pressure relief disc 5 is not damaged due to excessive pressure. That is, the pressure in the insulation outer sleeve 2 can only enter the second air passage 10 through the first air passage 7, which helps to concentrate the reciprocating movement of the sealing mechanism. At the same time, impurities in the external environment cannot enter the insulation outer sleeve 2 through the gap between the first sealing groove 11 and the pressure relief seat 8, so that the insulation performance of the insulation outer sleeve 2 is reduced, the risk of partial discharge is increased, and in severe cases, breakdown or line damage may occur. That is, the reliability and safety of the use of the insulation outer sleeve 2 are improved.

[0072] In an embodiment, the sealing mechanism comprises:

[0073] The annular groove 14 is arranged on the inner wall of the pressure relief cylinder 9, and the sealing disc 15 is arranged in the annular groove 14 in a sliding manner.

[0074] The first support pipe 16 and the second support pipe 17 are arranged at the two axial ends of the sealing disc 15, respectively. The ends of the first support pipe 16 and the second support pipe 17 away from the sealing disc 15 are connected to the inner wall of the pressure relief cylinder 9 in a sliding manner. The side walls of the first support pipe 16 and the second support pipe 17 are respectively provided with a plurality of support openings.

[0075] The U-shaped pipe 18 is arranged at least partially in the annular groove 14, and the open end of the U-shaped pipe 18 faces the direction of the pressure relief cylinder 9.

[0076] The second sealing ring is arranged on the side of the sealing disc 15 facing the pressure relief disc 5, and the second sealing ring is sleeved on the first support pipe 16.

[0077] The reset spring 19 is arranged outside the second support pipe 17. One end of the reset spring 19 is connected to the sealing disc 15, and the other end of the reset spring 19 is connected to the side of the annular groove 14 away from the pressure relief disc 5.

[0078] The pressure relief cylinder 9 and the second gas vent 0 are sealed and isolated by the sealing disc 15, the U-shaped tube 18 includes two first connecting tubes arranged in parallel and a second connecting tube connecting the two first connecting tubes, the first connecting tubes are arranged through the pressure relief cylinder 9, and the first connecting tubes are located within the range of the annular groove 14. During the pressure relief process, the gas pressure in the insulating jacket 2 can drive the sealing disc 15 to move between the two first connecting tubes, so that the gas on the upper and lower sides of the sealing disc 15 can be communicated through the U-shaped tube 18, and then the gas pressure in the insulating jacket 2 can be released through the first connecting tubes, the second connecting tube and the outer end of the pressure relief cylinder 9. By arranging the reset spring 19, on the one hand, the stability and reliability of the movement of the sealing disc 15 in the annular groove 14 can be ensured, and on the other hand, the reset of the sealing disc 15 is facilitated when there is no pressure release in the insulating jacket 2, which is helpful for the movement of the sealing disc 15 driven by the pressure in the insulating jacket 2 again next time. It should be noted that the second sealing ring is arranged away from the support ports on the first support tube 16.

[0079] Specifically, as shown in Figures 5 to 7 the sealing mechanism includes an annular groove 14, a first support tube 16, a second support tube 17, a U-shaped tube 18, a reset spring 19 and a second sealing ring. The annular groove 14 is arranged on the inner wall of the pressure relief cylinder 9, the sealing disc 15 is arranged in the annular groove 14 in a sliding manner, the first support tube 16 and the second support tube 17 are fixedly arranged at the two ends of the sealing disc 15 in the axial direction, the side walls of the first support tube 16 and the second support tube 17 are provided with a plurality of support ports, the first support tube 16 and the second support tube 17 extend into the pressure relief cylinder 9 and can reciprocate on the inner wall of the pressure relief cylinder 9, a plurality of U-shaped tubes 18 are arranged in the circumferential direction of the pressure relief cylinder 9, the first connecting tubes of the U-shaped tubes 18 penetrate the side wall of the pressure relief cylinder 9, one pair of first connecting tubes are located at the two ends in the height direction of the annular groove 14, the second connecting tube connecting the pair of first connecting tubes is located on the outer side of the pressure relief cylinder 9 or in the side wall of the annular groove 14, and the second sealing ring is fixedly arranged below the sealing disc 15. Figure 5The second sealing ring is sleeved on the first supporting tube 16, avoiding the supporting port arrangement, the reset spring 19 is sleeved on the second supporting tube 17, one end of the reset spring 19 is connected with the annular groove 14, and the other end of the reset spring 19 is connected with the sealing disc 15. After the pressure in the insulating sleeve 2 is increased, the gas pressure in the insulating sleeve 2 enters the second gas port 10 through the first gas port 7, so that the sealing disc 15 is pushed to move upwards, the reset spring 19 is compressed, and the first supporting tube 16 also enters the annular groove 14. The space in the insulating sleeve 2 is communicated with the space outside through the supporting ports on the first supporting tube 16 and the second supporting tube 17 and the U-shaped tube 18, so that the pressure in the insulating sleeve 2 is released, and damage of the insulating sleeve 2 caused by continuous increase of the pressure in the insulating sleeve 2 is avoided, and the normal work of the line is affected. The line lightning arrester has the advantages that the sealing disc 15 and the second sealing ring are sealed in normal times, and when the pressure in the insulating sleeve 2 is increased and released, the sealing disc 15 is pushed to move to between the two first connecting tubes of the U-shaped tube 18 by the gas pressure. The pressure release path is: the first supporting tube 16-the supporting port on the first supporting tube 16-the end of the annular groove 14 close to the first supporting tube 16-the U-shaped tube 18-the end of the annular groove 14 close to the second supporting tube 17-the supporting port on the second supporting tube 17-the second supporting tube 17-the pressure release cylinder 9.

[0080] Figure 5 A schematic view of a mounting mechanism according to an embodiment of the application.

[0081] In one possible implementation, as shown in Figure 5 the mounting mechanism comprises:

[0082] a first positioning groove 20 arranged on an inner wall of the mounting groove 6, and the first positioning groove 20 is annular;

[0083] a first cavity arranged in the pressure release seat 8, and a first positioning port 21 is arranged on the pressure release seat 8 corresponding to the first cavity;

[0084] a positioning ring 22 slidingly arranged in the first cavity;

[0085] a positioning mechanism arranged between the positioning ring 22 and the first positioning groove 20, and the positioning mechanism is configured to position the positioning ring 22 and the first positioning groove 20;

[0086] a position adjusting mechanism arranged between the positioning ring 22 and the pressure release seat 8, and the position adjusting mechanism is configured to adjust the position of the positioning ring 22 in the first cavity.

[0087] The mounting mechanism comprises a first positioning groove 20, a first cavity, a positioning ring 22, a positioning mechanism and a position adjusting mechanism. The first positioning groove 20 is formed in the side wall of the mounting groove 6. The first cavity is annular and is formed in the pressure relief seat 8. The pressure relief seat 8 is arranged in the pressure relief disc 5. The side wall of the first cavity (the side wall of the pressure relief seat 8) is provided with a first positioning opening 21 on the side facing the first positioning groove 20. The positioning ring 22 is slidingly arranged in the first cavity, i.e., can reciprocate in the height direction of the first cavity. The positioning mechanism connects the pressure relief disc 5 and the pressure relief seat 8. At least part of the position adjusting mechanism is arranged in the first cavity and connected with the positioning ring 22. The position of the positioning ring 22 in the first cavity can be adjusted by the position adjusting mechanism.

[0088] Figure 6 A schematic view of a positioning mechanism according to an embodiment of the present application.

[0089] In one possible implementation, as shown in Figure 6 the positioning mechanism comprises:

[0090] A second cavity is symmetrically arranged in the positioning ring 22. A second positioning opening 23 is formed in the side wall of the second cavity. The second positioning opening 23 is arranged corresponding to the first positioning opening 21.

[0091] A first gear 24 is rotatably arranged in the second cavity. The first gear 24 is provided with a positioning block 25. The positioning block 25 penetrates the second positioning opening 23 and the first positioning opening 21 in sequence. The positioning block 25 is clamped in the first positioning groove 20.

[0092] A third cavity is arranged in the positioning ring 22. The third cavity is located at the center of the positioning ring 22. The pair of second cavities are symmetrically arranged relative to the third cavity. The third cavity is in communication with the second cavities. A first gear ring 26 is rotatably connected in the third cavity. The first gear ring 26 is engaged with the first gear 24.

[0093] A first driving mechanism is arranged in the first cavity. The first driving mechanism is configured to drive the first gear 24 to rotate.

[0094] The positioning mechanism comprises a second cavity, a first gear 24, a third cavity and a first driving mechanism. The second cavity and the third cavity are arranged in the positioning ring 22. The third cavity is located at the center of the positioning ring 22. The two second cavities are symmetrically arranged relative to the third cavity. The sidewall (the outer wall of the positioning ring 22) of the second cavity is provided with a second positioning opening 23. When facing the first positioning opening 21, the second positioning opening 23 is located in the first positioning opening 21, and the size of the second positioning opening 23 is not greater than the size of the first positioning opening 21. The first gear 24 is rotatably arranged in the second cavity. The sidewall of the first gear 24 is fixedly provided with a positioning block 25. The positioning block 25 is configured to pass through the first positioning opening 21 and the second positioning opening 23, and the positioning block 25 can be clamped with the first positioning groove 20. The first gear ring 26 is rotatably connected in the third cavity. The first gear ring 26 is engaged with the first gear 24. The first driving mechanism is arranged in the first cavity and can drive the first gear 24 to rotate.

[0095] In an available embodiment, the first driving mechanism comprises:

[0096] The driving prism 27 sequentially penetrates the pressure relief seat 8, the positioning ring 22 and the first gear 24 from the side of the pressure relief cylinder 9. The driving prism 27 is connected with the first gear 24.

[0097] The first inner hexagonal bolt head 28 is fixedly connected with the driving prism 27, and the first inner hexagonal bolt head 28 is located outside the pressure relief seat 8.

[0098] Specifically, the first driving mechanism comprises the driving prism 27 and the first inner hexagonal bolt head 28. The driving prism 27 penetrates the upper wall of the pressure relief seat 8, and is arranged in the first cavity. The driving prism 27 is connected with the first gear 24. The center hole of the first gear 24 is matched with the driving prism 27. In this way, the first gear 24 and the positioning ring 22 can move on the driving prism 27, and the rotation of the driving prism 27 can drive the first gear 24 to rotate by clamping the center hole of the first gear 24 through the ridge of the driving prism 27. The first inner hexagonal bolt head 28 is fixedly arranged at one end of the driving prism 27, and the first inner hexagonal bolt head 28 is located outside the pressure relief seat 8.

[0099] It should be noted that the worker drives the prismatic 27 by turning the first inner hexagonal bolt head 28 with a wrench (an electric wrench or a manual wrench), so that the prismatic 27 rotates together with the first inner hexagonal bolt 28, drives the first gear 24 to rotate, drives the first gear ring 26 to rotate through the first gear 24, and enables the two positioning blocks 25 to be deeply inserted into the first positioning groove 20, so as to realize the connection between the pressure relief seat 8 and the pressure relief disc 5 through the cooperation of the positioning block 25 and the first positioning groove 20. The positioning block 25 is driven to move around the first gear 24 through the rotation of the first gear 24, and in the movement process of the positioning block 25, the end of the positioning block 25 away from the first gear 24 can be inserted into the first positioning groove 20; at the same time, during disassembly, the rotation of the positioning block 25 can be driven by the first gear 24, so that the positioning block 25 is rotated back to the second cavity for storage, thereby avoiding the influence of the extension state of the positioning block 25 on the disassembly of the pressure relief seat 8 and the mounting groove 6. It can be understood that the first positioning port 21 and the second positioning port 23 are both gap-fitted with the positioning block 25, and the gap will not interfere with the rotation of the positioning block 25, so as to facilitate the positioning block 25 to rotate in the second cavity and the second positioning port 21 (the first positioning port 21), and complete the installation and disassembly operation. Since there are two second cavities, there are two first gears 24, and the two first gears 24 are engaged with the first gear ring 26, so that the rotation directions of the two first gears 24 are consistent, and the clockwise or counterclockwise rotation of the positioning ring 22 is ensured.

[0100] Figure 7 Schematic view of a position adjustment mechanism according to an embodiment of the application.

[0101] In one possible implementation, as shown in Figure 7 the position adjustment mechanism comprises:

[0102] a first threaded rod 29, a pair of first threaded rods 29 being arranged in the first cavity, and the first threaded rod 29 being threadedly connected with the positioning ring 22;

[0103] a second gear 30 arranged in the first cavity, and the second gear 30 being fixedly connected with the first threaded rod 29;

[0104] a second driving mechanism arranged on the pressure relief seat 8, the second driving mechanism being configured to drive the pair of first threaded rods 29 to rotate synchronously.

[0105] As shown in Figures 4 to 7As shown, the position adjusting mechanism comprises a first threaded rod 29, a second gear 30 and a second driving mechanism, two first threaded rods 39 are rotationally arranged in the first cavity, the first threaded rod 29 is connected with the positioning ring 22 through threads, the second gear 30 is fixed on the upper end of the first threaded rod 29, and the second gear 30 is located in the first cavity, the second driving mechanism is arranged on the pressure relief seat 8, the first threaded rod 29 is driven to rotate through the second driving mechanism, and the up-down movement (micro-motion) of the positioning ring 22 in the first cavity is realized.

[0106] In an available embodiment, the second driving mechanism comprises:

[0107] A second tooth ring 31 is arranged in the first cavity, and the second tooth ring 31 is engaged with the second gear 30;

[0108] A second inner hexagonal bolt head 32 is arranged on one of the first threaded rods 29, and the second inner hexagonal bolt head 32 is located outside the pressure relief seat 8.

[0109] Further, the second driving mechanism comprises the second tooth ring 31 and the second inner hexagonal bolt head 32, the second tooth ring 31 is rotationally arranged in the first cavity and located at the upper end of the first cavity (close to the top wall of the pressure relief seat 8), the second tooth ring 31 is engaged with the second gear 30, and the second inner hexagonal bolt head 32 is connected with one end of one of the first threaded rods 29 and located outside the pressure relief seat 8.

[0110] Specifically, the staff drives the second inner hexagonal bolt head 32 by using a wrench, simultaneously drives the rotation of the two first threaded rods 29 through the engagement of the second gear 30 and the second tooth ring 31 by one inner hexagonal bolt head, and realizes the same direction rotation of the two first threaded rods 29 due to the connection of the two second gears 30 through the second tooth ring 31, and further realizes the up-down movement of the positioning ring 22 on the first threaded rod 29, realizes the position adjustment of the positioning ring 22 in the first cavity, and realizes the stable connection of the pressure relief seat 8 and the pressure relief disc 5 through the extrusion of the positioning block 25 to the first positioning groove 20.

[0111] Wherein, the driving prism 27 can be externally sleeved with a torsional spring, one end of the torsional spring is connected with the side wall of the first cavity, and the other end of the torsional spring is fixedly connected with the driving prism 27, and the rotation angle of the driving prism 27 is limited. Through the limiting of the torsional spring, the positioning block 25 can be prevented from being out of the first positioning groove 20 under the influence of vibration and other factors, that is, the stability of the positioning block 25 in the first positioning groove 20 is realized through the reset of the torsional spring. That is to say, the rotation of the driving prism 27 driving the first gear 24 is avoided due to vibration, that is, the first gear 24 is prevented from being out of the first positioning port 21 (the second positioning port 23).

[0112] Figure 3An internal schematic view of an insulating jacket according to one embodiment of the present application.

[0113] In one possible implementation, as shown in Figure 3 The line arrester further comprises:

[0114] The wiring terminal 4 is arranged at both ends of the length direction of the insulating jacket 2, and the wiring terminal 4 is electrically connected with the zinc oxide varistor 3.

[0115] The wiring terminal 4 is arranged at both ends of the length direction of the insulating jacket 2, and the wiring terminal 4 is electrically connected with the zinc oxide varistor 3.

[0116] It should be noted that the up and down in the present application refer to the up and down positions in the drawings.

[0117] In use, the worker inserts the pressure relief seat 8 into the installation groove 6 (pressure relief disc 5), turns the first inner hexagonal bolt head 28 by using a wrench, and then drives the driving prism 27, the first gear 24, the first toothed ring 26, and the other first gear 24 to rotate, so that the positioning block 25 can move out of the second cavity and penetrate through the second positioning opening 23 and the first positioning opening 21, and the positioning hole 25 extends into the clamping in the first positioning groove 20. The connection of the pressure relief disc 5 and the pressure relief seat 8 is realized by the cooperation of the positioning block 25 and the first positioning groove 20. Then the worker turns the second inner hexagonal bolt head 32 by using a wrench, and then drives the first threaded rod 29, the second gear 30, the second toothed ring 31, and the other first threaded rod 29 to rotate together, realizing the up and down movement of the positioning ring 22 on the first threaded rod 29 (two first threaded rods 29 are arranged to make the movement of the positioning ring 22 more stable), so that the positioning block 25 can be extruded on the upper wall of the first positioning groove 20, realizing the extrusion of the positioning block 25 on the first positioning groove 20, and further improving the reliability and stability of the connection of the pressure relief disc 5 and the pressure relief seat 8. When multiple lightning strikes cause the pressure in the insulating sleeve 2 to increase, the pressure in the insulating sleeve 2 can drive the sealing disc 15 to move, so that the sealing disc 15 moves to between the two first connecting pipes of the U-shaped pipe 18. At this time, the pressure is discharged through the plurality of supporting openings on the first supporting pipe 16 and the second supporting pipe 17, enters the first connecting pipe of the U-shaped pipe 18, so that the gas pressure in the first supporting pipe 16 enters the second supporting pipe 17 through the U-shaped pipe 18, and then is discharged through the pressure relief cylinder 9, reducing the gas pressure in the insulating sleeve 2, that is, the insulating sleeve 2 can be connected with the external environment, facilitating the release of the pressure in the insulating sleeve 2, avoiding the damage of the insulating sleeve 2 caused by the continuous increase of the pressure in the insulating sleeve 2, and improving the service life of the insulating sleeve 2. The pressure relief seat 8 and the pressure relief cylinder 9 are integrally formed.

[0118] It should be noted that the detachable connection of the pressure relief disc 5 and the pressure relief seat 8 can avoid the gas pressure entering the pressure relief seat 8 to cause a certain torsion. That is, when the gas pressure enters the pressure relief disc 5 to form a certain torsional force on the pressure relief seat 8, the pressure relief seat 8 can rotate as a whole in the pressure relief disc 5 (the positioning block 25 is in the first positioning groove 20) to release the torsional force, avoiding the pressure relief seat 8 being twisted hard, and affecting the service life of the pressure relief disc 5 and the pressure relief seat 8. Therefore, the pressure relief disc 5 and the pressure relief seat 8 are not integrally formed.

[0119] In the present disclosure, the terms "first" and "second" are used only for descriptive purposes and not to connote or imply relative importance. The term "plurality" refers to two or more, unless otherwise indicated.

[0120] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the present application along with its general principles and features. The specification and examples are to be construed as merely illustrative of preferred embodiments of the present application.

[0121] The above description is only the preferred embodiment of the present application, not to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A line arrester for protection against multiple lightning strokes, comprising a mounting base, characterized in that The line lightning arrester comprises: An insulating sheath is arranged at one end of the mounting base, and a zinc oxide resistor is arranged in the insulating sheath; A pressure relief disc penetrates the insulating sheath, and the pressure relief disc is fixedly connected with the insulating sheath, and a mounting groove and a first air passage are arranged in the pressure relief disc, and the first air passage is arranged in communication with the mounting groove; A pressure relief seat is arranged in the mounting groove, a pressure relief cylinder is arranged on the pressure relief seat, and a second air passage is arranged on the pressure relief seat, and the second air passage is in communication with the pressure relief cylinder.

2. The line surge arrester for protection against multiple lightning strokes according to claim 1, characterized in that, The line lightning arrester further comprises: A mounting mechanism is arranged between the mounting groove and the pressure relief seat, and the mounting mechanism is configured to connect the pressure relief disc and the pressure relief seat; A sealing mechanism is arranged in the pressure relief cylinder, and the sealing mechanism is configured to seal the pressure relief cylinder.

3. The line surge arrester for protection against multiple lightning strokes according to claim 1, characterized in that, An end of the mounting groove away from the pressure relief cylinder is provided with a first sealing groove, the first sealing groove is arranged above the first air passage, one end of the pressure relief seat towards the pressure relief disc is provided with a sealing ring, one end of the sealing ring towards the pressure relief disc is arranged in flush with one end of the second air passage towards the pressure relief disc, and a first sealing ring is further arranged on one end of the sealing ring towards the pressure relief disc, and the first sealing ring is in abutment with the first sealing groove.

4. The line surge arrester for protection against multiple lightning strokes according to claim 2, characterized in that, The sealing mechanism comprises: An annular groove is arranged on the inner wall of the pressure relief cylinder, and a sealing disc is slidably arranged in the annular groove; A first support pipe and a second support pipe are respectively arranged at two ends of the sealing disc in the axial direction, one end of the first support pipe and the second support pipe away from the sealing disc is slidably connected with the inner wall of the pressure relief cylinder, and a plurality of support openings are respectively arranged on the side walls of the first support pipe and the second support pipe; A U-shaped pipe is at least partially arranged in the annular groove, and the opening end of the U-shaped pipe is towards the direction of the pressure relief cylinder; A second sealing ring is arranged on one side of the sealing disc towards the pressure relief disc, and the second sealing ring is sleeved on the first support pipe; A reset spring is externally arranged on the second support pipe, one end of the reset spring is connected with the sealing disc, and the other end of the reset spring is connected with one side of the annular groove away from the pressure relief disc.

5. The line surge arrester for protection against multiple lightning strokes according to claim 1, characterized in that, The mounting mechanism comprises: A first positioning groove is arranged on the inner wall of the mounting groove, and the first positioning groove is annular; A first cavity is arranged in the pressure relief seat, and a first positioning opening is arranged on the corresponding pressure relief seat of the first cavity, and the first positioning opening corresponds to the first positioning groove; A positioning ring is slidably arranged in the first cavity; A positioning mechanism is arranged between the positioning ring and the first positioning groove, and the positioning mechanism is configured to position the positioning ring and the first positioning groove; A position adjusting mechanism is arranged between the positioning ring and the pressure relief seat, and the position adjusting mechanism is configured to adjust the position of the positioning ring in the first cavity.

6. The line surge arrester for protection against multiple lightning strokes according to claim 5, characterized in that, The positioning mechanism comprises: A pair of second cavities are symmetrically arranged in the positioning ring, a second positioning opening is arranged on the side wall of the second cavity, and the second positioning opening is arranged corresponding to the first positioning opening. A first gear is rotatably arranged in the second cavity, and the first gear is provided with a positioning block, the positioning block sequentially penetrates the second positioning opening and the first positioning opening, and the positioning block is clamped in the first positioning groove; A third cavity is arranged in the positioning ring, and the third cavity is located at the center of the positioning ring. A pair of second cavities are symmetrically arranged relative to the third cavity, and the third cavity is in communication with the second cavities. A first tooth ring is rotatably connected in the third cavity, and the first tooth ring is engaged with the first gear; A first driving mechanism is arranged in the first cavity, and the first driving mechanism is configured to drive the first gear to rotate.

7. The line surge arrester for protection against multiple lightning strokes according to claim 6, characterized in that, The first driving mechanism comprises: A driving prism sequentially penetrates the pressure relief seat, the side of the pressure relief cylinder, the positioning ring and the first gear, and the driving prism is connected with the first gear; A first inner hexagonal bolt head is fixedly connected with the driving prism, and the first inner hexagonal bolt head is located outside the pressure relief seat.

8. The line surge arrester for protection against multiple lightning strokes according to claim 5, characterized in that, The position adjusting structure comprises: A pair of first threaded rods are arranged in the first cavity, and the first threaded rods are threadedly connected with the positioning ring; A second gear is arranged in the first cavity, and the second gear is fixedly connected with the first threaded rods; A second driving mechanism is arranged on the pressure relief seat, and the second driving mechanism is configured to drive the pair of first threaded rods to synchronously rotate.

9. The line surge arrester for protection against multiple lightning strokes according to claim 8, characterized in that, The second driving mechanism comprises: A second tooth ring is arranged in the first cavity, and the second tooth ring is engaged with the second gear; A second inner hexagonal bolt head is arranged on one of the first threaded rods, and the second inner hexagonal bolt head is located outside the pressure relief seat.

10. The line surge arrester for protection against multiple lightning strokes according to any one of claims 1 to 9, characterized in that, The line lightning arrester further comprises: Wire terminals are arranged at both ends of the length direction of the insulating outer sleeve, and the wire terminals are electrically connected with the zinc oxide varistor.

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