Composite zinc oxide detachable lightning arrester

Abstract

The application relates to the technical field of lightning arresters, in particular to a composite zinc oxide detachable lightning arrester, which comprises an insulating column, the two ends of the insulating column are respectively provided with a conductive assembly and a hanging part, a lightning arrester body is arranged between the conductive assembly and the hanging part, a disengager body is arranged at the bottom of the lightning arrester body, a thermal explosion element is arranged in the disengager body, a disengaging assembly makes the lightning arrester body disengage from the power grid through a thermal explosion mechanism, and a visible disconnection mark is formed; a shell is arranged at the bottom of the disengager body, a pulling piece is arranged in the shell, and the two ends of the pulling piece are respectively connected with the disengager body and a connecting part; through arrangement of the connecting part and the pulling piece, after the thermal explosion mechanism is started, the connecting part can exert a pulling action on the lightning arrester body through the pulling piece, so that the lightning arrester body can synchronously obtain an additional downward traction force, and the situation that the lightning arrester body cannot be rapidly disengaged due to too close combination of the conductive head and the conductive pressure plate can be avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lightning arresters, in particular to a composite zinc oxide detachable lightning arrester. BACKGROUND

[0002] The detachable lightning arrester is obtained by adaptive modification of a distribution type zinc oxide lightning arrester and installation of the lightning arrester on a falling mechanism of a falling type fuse. Based on this design, under the condition of not cutting off the power supply, the electric power maintenance personnel can conveniently implement detection, maintenance and replacement operation of the lightning arrester by means of an insulating pole operating lever. This design not only guarantees the continuous and stable operation of the power line, but also significantly reduces the work load and operation time of the electric power maintenance personnel.

[0003] However, in actual operation scenarios, the conventional falling type lightning arrester has the risk of accidental falling during the falling operation. Specifically, during the falling process of the lightning arrester body, due to the action of the falling impact force of the lightning arrester body, the lightning arrester body is prone to separate from the insulator, i.e. the hanging rod is detached from the hanging groove, thereby causing the lightning arrester body to fall. This accidental falling may not only cause injury to pedestrians, but also cause damage to surrounding objects.

[0004] The technical solution of Chinese patent application No. 202110888691.3 discloses a falling type lightning arrester for power supply lines, which comprises an insulating column body, a hole piece is installed on the insulating column body, the bottom end of the insulating column body is installed on a base, a conductive seat is arranged at the top of the insulating column body, a lightning arrester body is arranged at the bottom right of the conductive seat, and a disengager is installed at the bottom end of the lightning arrester body. When the lightning arrester body falls, the lightning arrester body can be held by a fixing box, the bottom end of the second conductive sheet is in contact with the top end of the two first conductive sheets during the holding process, at this time a loop is formed between the first conductive sheet, the battery, the transmitter and the second conductive sheet, at this time the transmitter can transmit signals to a signal chamber through a wireless network, and the specific position of the lightning arrester body can be clearly known through a GPS locator, so that the staff can timely repair and maintain the lightning arrester body.

[0005] Although the foregoing patent technical solution holds up the lightning arrester body by means of the fixing box, effectively avoiding the problem of detachment of the hanging rod from the hanging groove during the falling process of the lightning arrester body, in actual engineering applications, the existing detachable lightning arrester still exposes several technical problems to be solved.

[0006] First, in terms of the disengagement mechanism of the existing detachable surge arrester, the downward falling disengagement is realized by relying on the gravity of the surge arrester body itself. However, the surge arrester body and the conductive pressure plate in the complex outdoor environment will inevitably be eroded and rusted. When the disengagement device starts to work, the top of the surge arrester body and the conductive pressure plate may occasionally be too tightly combined to be quickly disengaged. If this abnormal situation cannot be solved in time, it will cause a series of more serious follow-up chain problems, which will threaten the safe and stable operation of the power system.

[0007] Secondly, during the installation of the surge arrester body, the elastic contact piece or spring of the conductive pressure plate is prone to metal fatigue under the action of long-term pressure. At the same time, the moisture, pollutants and other adverse factors in the environment will accelerate the rusting process of the elastic contact piece or spring, resulting in a significant decrease in the springback force. When the compression force is insufficient, the surge arrester body will sway back and forth during use, thereby causing the arcing phenomenon between the surge arrester body and the conductive pressure plate. In addition, in strong wind weather conditions, the strong wind will cause the horizontal swing of the surge arrester body, resulting in the displacement of the contact point between the conductive pressure plate and the surge arrester body. At this time, the original contact surface is separated, and the arc is generated at the moment of disconnection; when the surge arrester body swings back, it may re-contact, forming a periodic discharge phenomenon. Compared with stable arc, this intermittent arc is more harmful. Each time the arc is disconnected, the air ionization has not completely dissipated, the reignition voltage is reduced, thereby causing the discharge frequency to increase sharply, accelerating the ablation process of the equipment and shortening the service life of the equipment. SUMMARY

[0008] The purpose of the present application is to provide a composite zinc oxide detachable surge arrester to solve the technical problems raised in the above background.

[0009] To achieve the above purpose, the present application provides the following technical scheme:

[0010] A composite zinc oxide detachable surge arrester, comprising an insulating column, the two ends of which are respectively provided with a conductive assembly and a hanging part;

[0011] A surge arrester body, the top of which is connected with the conductive assembly through a conductive head, and the bottom of which is connected with the hanging part through a butt joint;

[0012] A disengagement assembly, comprising a disengagement device body arranged between the surge arrester body and the hanging part, the disengagement device body being provided with a thermal explosion element, when the power frequency leakage current of the surge arrester body abnormally increases, the disengagement assembly makes the surge arrester body disengage from the power grid through the thermal explosion mechanism, and forms a visible disconnection mark;

[0013] The traction assembly comprises a shell connected with the disconnector body, a traction member is arranged in the shell, one end of the traction member is connected with the disconnector body, and the other end is connected with a connecting part; when the thermal explosion mechanism of the disconnection assembly is started, the connecting part pulls the arrester body through the traction member.

[0014] Preferably, the thermal explosion element comprises:

[0015] A cavity is arranged in the disconnector body, and an electric resistance member is arranged in the cavity, electrically conductive tabs are arranged at the upper and lower ends of the electric resistance member, and a discharge gap exists between the two electrically conductive tabs

[0016] A thermal explosion tube is arranged below the electric resistance member and is connected with the connecting part; when the thermal explosion mechanism is started, the thermal explosion tube pushes the connecting part to disconnect from the disconnection assembly.

[0017] Preferably, the connecting part comprises:

[0018] A mounting cylinder is arranged at the bottom of the shell and is connected with the counterpiece;

[0019] A moving member is arranged in the shell and is connected with the mounting cylinder in a sliding manner, and one end of the moving member extending into the cavity is connected with the thermal explosion tube.

[0020] Preferably, an abutting assembly is arranged at the hanging part, the abutting assembly is connected with the mounting cylinder, and when the abutting assembly is in a compressed state, the moving member is in an upward moving state.

[0021] A pushing assembly is arranged between the disconnection assembly and the arrester body, the pushing assembly is in contact with the moving member, and when the moving member moves upward, the arrester body is pushed upward by the pushing assembly.

[0022] Preferably, the pushing assembly comprises:

[0023] A connecting block is fixedly connected with the arrester body;

[0024] An elastic connecting member is arranged in a movable chamber in the connecting block and is connected with the movable chamber in a limiting and sliding manner, one end of the elastic connecting member extending out of the connecting block is fixedly connected with the disconnector body;

[0025] A movable member is arranged below the connecting block, one end of the movable member is connected with the connecting block, and the other end of the movable member is in contact with the moving member.

[0026] Preferably, the abutting assembly comprises:

[0027] A pressing part is connected with the hanging part through a support at one end and is in abutment with the counterpiece at the other end;

[0028] A connecting pipe is connected with the pressing part at one end and is connected with the mounting cylinder at the other end.

[0029] Preferably, the docking piece comprises:

[0030] The docking block is provided with a hanging rod, and the hanging rod is connected with the hanging part;

[0031] The first connecting piece is connected with the docking block at one end and fixedly connected with the body of the disconnector at the other end;

[0032] The second connecting piece is connected with the docking block at one end and fixedly connected with the mounting cylinder at the other end.

[0033] Preferably, the hanging part comprises a connecting plate arranged at the bottom of the insulating column, and the connecting plate is provided with a hook connected with the docking block;

[0034] The extrusion part is arranged at the connection between the connecting plate and the hook, and the extrusion part is abutted with the docking block.

[0035] Preferably, the conductive assembly comprises a conductive seat arranged at the top of the insulating column, and a conductive pressure plate is arranged below the conductive seat, and an elastic piece is arranged between the conductive pressure plate and the conductive seat.

[0036] Preferably, the lower surface of the conductive pressure plate is provided with a groove.

[0037] The technical effects and advantages of the present application are as follows:

[0038] 1. The present application sets the moving piece and the pulling piece, when the body of the lightning arrester is damaged by lightning or aging, and a strong impact force is generated by the explosion of the thermal explosion tube, since one end of the pulling piece is fixed with the body of the disconnector and the other end is connected with the second connecting piece through the connecting part, the connecting part exerts a pulling action on the body of the disconnector through the pulling piece at the moment of explosion, so that the body of the lightning arrester obtains an additional downward pulling force synchronously. This pulling force can effectively avoid the situation that the body of the lightning arrester cannot be quickly separated due to the close combination of the conductive head and the conductive pressure plate, and ensures that the lightning arrester can be reliably separated in the fault condition, thereby providing protection for the safe and stable operation of the power system.

[0039] 2. The present application sets the moving piece and the pulling piece, when the pressing force of the conductive pressure plate on the conductive head is insufficient, and the body of the lightning arrester shakes in severe weather such as strong wind, the docking block extrudes the extrusion part, the medium enters the mounting cylinder through the connecting pipe to push the moving piece to move upward, and then the connecting block connected with the body of the lightning arrester moves upward, which increases the length of the body of the lightning arrester and enhances the connection strength of the conductive head and the conductive pressure plate, thereby effectively avoiding the shaking of the body of the lightning arrester. At the same time, the moving piece moves upward to compress the cavity free space, and when the thermal explosion tube explodes, the gas pressure rises sharply, thereby enhancing the pulling force on the body of the lightning arrester and ensuring that it can be reliably separated in the fault condition. BRIEF DESCRIPTION OF DRAWINGS

[0040] Figure 1 The present application is a schematic diagram of the main structure;

[0041] Figure 2 The main structure diagram of the stable assembly of the present application;

[0042] Figure 3 The connection structure diagram of the disengagement assembly and the traction assembly of the present application;

[0043] Figure 4 The structure diagram of the disengagement assembly of the present application;

[0044] Figure 5 The cross-sectional diagram of the traction assembly of the present application;

[0045] Figure 6 The enlarged structure diagram of A in the present application Figure 5

[0046] Figure 7 The state diagram of the disengagement assembly of the present application when disengaging;

[0047] Figure 8 The working principle diagram of the disengagement assembly of the present application.

[0048] In the figure:

[0049] 1, insulating column;

[0050] 2, conducting assembly; 201, conducting seat; 202, conducting pressure plate; 203, elastic piece;

[0051] 3, hanging part; 301, connecting plate; 302, hook;

[0052] 4, disengagement assembly; 401, disengagement body; 402, cavity; 403, conducting tab; 404, resistance piece; 405, thermal detonator;

[0053] 5, traction assembly; 501, shell; 502, traction piece; 503, connecting part; 5031, mounting cylinder; 5032, moving piece;

[0054] 6, butt joint piece; 601, butt joint block; 602, first connecting piece; 603, second connecting piece;

[0055] 7, abutting assembly; 701, extrusion part; 702, connecting pipe;

[0056] 8, pushing assembly; 801, connecting block; 802, elastic connecting piece; 803, movable piece;

[0057] 9, arrester body;

[0058] 10, conducting head. DETAILED DESCRIPTION

[0059] ​With reference to the accompanying drawings on the basis of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0060] Embodiment one

[0061] With reference to the accompanying drawings on the basis of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application. Figures 1 to 8 As shown in the figure, the present application provides a composite zinc oxide detachable lightning arrester, which comprises an insulating column 1, a conductive assembly 2 and a hanging part 3 arranged at both ends of the insulating column 1 respectively, and a lightning arrester body 9 arranged between the conductive assembly 2 and the hanging part 3.

[0062] The top of the lightning arrester body 9 is connected with the conductive assembly 2 through a conductive head 10, and the bottom of the lightning arrester body 9 is connected with the hanging part 3 through a butt joint 6.

[0063] The conductive assembly 2 comprises a conductive seat 201 arranged at the top of the insulating column 1, a conductive pressure plate 202 arranged below the conductive seat 201, an elastic piece 203 arranged between the conductive pressure plate 202 and the conductive seat 201, and a recess arranged on the lower surface of the conductive pressure plate 202.

[0064] The hanging part 3 comprises a connecting plate 301 arranged at the bottom of the insulating column 1, and a hook 302 arranged on the connecting plate 301.

[0065] The butt joint 6 comprises a butt block 601, a hanging rod connected with the hook 302 arranged on the butt block 601, a first connecting piece 602 and a second connecting piece 603 connected with the lightning arrester body 9 arranged on the butt block 601, and a disengaging assembly 4 arranged between the first connecting piece 602 and the second connecting piece 603.

[0066] The disengaging assembly 4 comprises a disengaging device body 401 connected with the lightning arrester body 9, a cavity 402 arranged in the disengaging device body 401, a resistance piece 404 arranged in the cavity 402, conductive poles 403 arranged at the upper and lower ends of the resistance piece 404, and a discharge gap between the two conductive poles 403, and a thermal explosion tube 405 arranged below the resistance piece 404. When the power frequency leakage current of the lightning arrester body 9 abnormally increases, the current will break through the discharge gap between the conductive poles 403, thereby triggering the thermal explosion tube 405 to act, and realizing the disengaging operation of the lightning arrester body 9 and the conductive assembly 2.

[0067] In the embodiment, one end of the first connecting piece 602 and the second connecting piece 603 close to the butt block 601 is rotatably connected with the butt block 601, and the other end of the first connecting piece 602 and the second connecting piece 603 close to the lightning arrester body 9 is fixedly connected with the lightning arrester body 9.

[0068] In actual application process, the worker will be connected to the block 601 of the hook rod hook 302, and then the arrester body 9 is deflected to operate, so that the conductive head 10 on the arrester body 9 is accurately connected with the recess on the conductive pressure plate 202, and then the installation of the arrester body 9 is completed. After installation, the arrester body 9 is between the conductive assembly 2 and the hooking part 3. The specific installation position can be referred to Figure 1 As shown in Figure 2 As shown in

[0069] When lightning or operating overvoltage occurs, the zinc oxide resistor inside the arrester body 9 will quickly change from high resistance state to low resistance state, and the overvoltage current will be effectively led to the ground, thereby realizing the protection of the rear-end equipment.

[0070] If the arrester body 9 is damaged due to repeated lightning or its own aging and other factors, the continuous power frequency short-circuit current will generate an arc at the discharge gap between the conductive sheets 403 when flowing through the cavity 402. The arc energy will quickly heat the thermal explosion tube 405, and when the temperature rises to about 160°C, the thermal explosion tube 405 will have a controllable explosion. The impact force generated by the explosion will push the second connecting piece 603 and the arrester body 9 to disconnect.

[0071] When the second connecting piece 603 and the arrester body 9 are disconnected, the stable connection between the arrester body 9 and the adapter 6 is broken. At this time, the arrester body 9 falls under the action of gravity (its falling process is similar to the falling of the fuse tube of the fuse), and a clear isolation fracture is formed.

[0072] The disconnected arrester body 9 is suspended in the air or falls to the ground, providing a visible fault signal for the operation and maintenance personnel, so that they can quickly locate and replace it.

[0073] Embodiment two

[0074] Although the above embodiment realizes the disconnection of the arrester body 9 from the power grid through the thermal explosion mechanism of the disconnection assembly 4, but in terms of disconnection mechanism, it mainly relies on the gravity of the arrester body itself to realize downward falling disconnection. However, the arrester body and the conductive pressure plate 202 in the long-term outdoor complex environment will inevitably be eroded and rusted. When the disconnector starts to work, occasionally the top of the arrester body and the conductive pressure plate 202 cannot be quickly disconnected due to too tight combination. In view of this, the technical improvement is made on the basis of the first embodiment, and the improved technical scheme is as follows.

[0075] As shown in Figures 1 to 8 The present application provides a composite zinc oxide detachable arrester, which comprises a traction assembly 5 arranged below the disconnection assembly 4.

[0076] The traction assembly 5 comprises a shell 501 connected with the disconnector body 401, and a traction member 502 is arranged in the shell 501. One end of the traction member 502 is fixedly connected with the disconnector body 401, and the other end is connected with a connecting part 503. When the thermal explosion mechanism of the disconnection assembly 4 is started, the connecting part 503 pulls the arrester body 9 through the traction member 502. The connecting part 503 is connected with the second connecting member 603.

[0077] The traction member 502 is composed of a steel wire or other high-strength wire. One end of the steel wire is fixedly connected with the disconnector body 401 by welding, and the other end is also fixedly connected with the connecting part 503 by welding, so as to ensure the stability of the traction member 502 in the system.

[0078] It should be particularly pointed out that the disconnector body 401 in the embodiment is made of explosion-proof material. A through hole is arranged at the bottom of the disconnector body 401 and is in communication with the shell 501. When the thermal explosion tube 405 works, the explosion energy has strong impact force, but cannot cause explosion damage to the disconnector body 401 made of explosion-proof material. The energy will enter the shell 501 through the through hole at the bottom, and then push the shell 501 and the disconnector body 401 to be disconnected.

[0079] When the arrester body 9 is damaged due to multiple lightning strikes or its own aging and other factors, the continuous power frequency short-circuit current will generate an arc at the discharge gap between the conductive sheets 403. The arc energy rapidly accumulates and heats the thermal explosion tube 405, so as to cause the thermal explosion tube 405 to have a controllable explosion. The strong impact force generated by the explosion of the thermal explosion tube 405 is transmitted into the shell 501 through the through hole, and the shell 501 and the disconnector body 401 are separated.

[0080] At the same time, the energy generated by the explosion also pushes the connecting part 503 away from the disconnector body 401. However, since the two ends of the traction member 502 are fixedly connected with the connecting part 503 and the disconnector body 401 respectively, at the moment of explosion, the connecting part 503 will exert a pulling action on the disconnector body 401 through the traction member 502. Since the disconnector body 401 is fixedly connected with the arrester body 9, and the explosion energy of the thermal explosion tube 405 will not damage the disconnector body 401, when the connecting part 503 pulls the disconnector body 401 through the traction member 502, the arrester body 9 will synchronously obtain an additional downward traction force. This additional traction force can effectively avoid the situation that the arrester body 9 cannot be rapidly disconnected due to the too tight combination of the conductive head 10 and the conductive pressure plate 202, so as to ensure the reliable disconnection of the arrester under fault conditions.

[0081] Embodiment three

[0082] Although the above embodiment achieves the rapid disengagement of the arrester body 9 by the pulling force generated by the pulling member 502 when exploding, when the pressing force of the conductive pressure plate 202 on the conductive head 10 is insufficient, in strong wind weather conditions, the arrester body will sway back and forth, causing the contact point of the conductive pressure plate 202 with the arrester body to displace, and an arc will be generated at the moment of separation of the original contact surface. When swinging back, it may re-contact and form periodic discharge. Such intermittent arc is more harmful, the discharge frequency increases, which can accelerate the ablation of the equipment and shorten the service life. In view of this, technical improvement is made on the basis of the second embodiment, and the improved technical scheme is as follows.

[0083] Referring to Figures 3 to 7 As shown in the figure, the connecting part 503 includes a mounting cylinder 5031 arranged at the bottom of the shell 501, and the mounting cylinder 5031 is connected with the second connecting piece 603. The outer side of the mounting cylinder 5031 is provided with threads, and the second connecting piece 603 is fixedly connected with the mounting cylinder 5031 through a nut.

[0084] The inside of the shell 501 is provided with a moving piece 5032, which is slidingly connected with the mounting cylinder 5031. One end of the moving piece 5032 extending into the cavity 402 is connected with the heat bomb 405.

[0085] Referring to Figures 1 to 8 As shown in the figure, the hanging part 3 is provided with an abutting assembly 7, which is connected with the mounting cylinder 5031. When the abutting assembly 7 is in a pressed state, the moving piece 5032 is in an upward moving state.

[0086] The disengaging assembly 4 and the arrester body 9 are provided with a pushing assembly 8, which is in contact with the moving piece 5032. When the moving piece 5032 moves upward, the arrester body 9 is pushed upward by the pushing assembly 8.

[0087] Referring to Figures 4 to 7 As shown in the figure, the pushing assembly 8 includes a connecting block 801 fixedly connected with the arrester body 9. The connecting block 801 is provided with a movable chamber. The movable chamber is provided with an elastic connecting piece 802 in limiting sliding connection. One end of the elastic connecting piece 802 extending out of the connecting block 801 is fixedly connected with the disengager body 401. The lower side of the connecting block 801 is provided with a movable piece 803. One end of the movable piece 803 is connected with the connecting block 801, and the other end of the movable piece 803 is in contact with the moving piece 5032.

[0088] The elastic connecting piece 802 includes a movable block in limiting sliding connection with the movable chamber. The movable block and the movable chamber are provided with a spring. The middle part of the spring is provided with a fixed rod fixedly connected with the movable block. One end of the fixed rod extending out of the connecting block 801 is fixedly connected with the disengager body 401.

[0089] In this embodiment, the cross section of the moving piece 5032 is in the shape of a "cross", the horizontal part of the moving piece 5032 is in contact with the movable piece 803, one end of the vertical part of the moving piece 5032 extends into the cavity 402 through the through hole and is connected with the thermal detonation tube 405, and the other end of the vertical part of the moving piece 5032 is in sealed sliding connection with the mounting cylinder 5031 through the rubber ring. The outer surface of the vertical part of the moving piece 5032 is in close contact with the inner ring of the through hole.

[0090] Referring to Figure 2 As shown in the figure, the abutting assembly 7 includes a pressing part 701 connected with the hanging part 3 through a support, and the pressing part 701 is in abutment with the counterpiece 6; a connecting pipe 702 is arranged between the pressing part 701 and the mounting cylinder 5031.

[0091] The pressing part 701 is mainly composed of an elastic bellows, and a one-way air inlet valve is arranged on the elastic bellows. One end of the connecting pipe 702 is in communication with the elastic bellows, and the other end is fixedly connected with the mounting cylinder 5031, and a one-way air inlet valve is also arranged at the connection between the connecting pipe 702 and the mounting cylinder 5031. During the reciprocating shaking of the arrester body 9, the counterpiece 601 will exert a pressing action on the pressing part 701, so that the medium in the pressing part 701 enters the inside of the mounting cylinder 5031, and then pushes the moving piece 5032 to move upward. It is a mature technology to deliver medium into the container by pressing the pressing part 701, which will not be described here.

[0092] In actual use scenarios, when the spring on the conductive pressure plate 202 appears metal fatigue phenomenon, or encounters strong wind weather, the arrester body 9 may produce back and forth shaking. Since the counterpiece 601 is fixed with the arrester body 9 through the first connecting piece 602 and the second connecting piece 603, when the arrester body 9 shakes, the counterpiece 601 will reciprocally press the pressing part 701. After the pressing part 701 is pressed, the medium is injected into the inside of the mounting cylinder 5031 through the connecting pipe 702. With the gradual increase of the pressure in the inside of the mounting cylinder 5031, the vertical part of the moving piece 5032 is pushed to move upward. During the upward movement of the moving piece 5032, the horizontal part of the moving piece 5032 pushes the connecting block 801 fixedly connected with the arrester body 9 through the movable piece 803 to move upward, thereby increasing the length of the arrester body 9. This process improves the connection strength between the conductive head 10 on the arrester body 9 and the conductive pressure plate 202, effectively avoiding the phenomenon that the arrester body 9 shakes back and forth due to the insufficient pressing force of the conductive pressure plate 202 on the conductive head 10.

[0093] It should be noted that the connecting block 801 is fixedly connected with the disconnector body 401 through the elastic connecting piece 802; when the movable piece 803 pushes the connecting block 801 to move upward, the elastic connecting piece 802 will extend out of the movable cavity, providing a certain margin for the upward movement of the connecting block 801, and ensuring the smooth progress of the whole process.

[0094] During the upward movement of the vertical part of the moving piece 5032, the part of the moving piece 5032 entering the cavity 402 gradually increases, thereby compressing the empty interval in the cavity 402. When the thermal detonator 405 explodes, due to the decrease of the area of the empty interval in the cavity 402, the gas pressure generated by the explosion rises sharply in a short time, and the energy of the explosion acting on the moving piece 5032 also increases synchronously. This makes the pulling force of the moving piece 5032 on the arrester body 9 through the pulling piece 502 increase synchronously, effectively avoiding the situation that the pulling force of the pulling piece 502 on the arrester body 9 is not enough to pull the arrester body 9 and the conductive pressure plate 202 apart quickly due to the increase of the connection strength between the conductive head 10 and the conductive pressure plate 202.

[0095] In addition, since the connecting part 503 is fixedly connected with the disconnector body 401 through the pulling piece 502, and the shell 501 is connected with the extrusion part 701 through the connecting pipe 702, when the thermal detonator 405 explodes, the connecting part 503 and the shell 501 will not splash due to the restriction of the pulling piece 502 and the connecting pipe 702. This is particularly important for the arrester body 9 arranged in urban areas or densely populated areas, and can effectively avoid the adverse effects of splashed fragments on human safety.

[0096] Finally, it should be pointed out that the above description is only a preferred embodiment of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent replacements for some technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

[0097] Although embodiments of the present application have been shown and described, those skilled in the art can make various changes, modifications, replacements and deformations to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A composite zinc oxide detachable surge arrester, comprising an insulating column, with conductive components and mounting parts respectively provided at both ends, characterized in that: The surge arrester body has its top connected to the conductive component via a conductive head, and its bottom connected to the mounting part via a docking part; The disconnection assembly includes a disconnector body disposed between the surge arrester body and the mounting part. The disconnector body is equipped with a thermal explosion element. When the power frequency leakage current of the surge arrester body increases abnormally, the disconnection assembly disconnects the surge arrester body from the power grid through the thermal explosion mechanism and forms a visible disconnection mark. The traction assembly includes a housing connected to the release arrester body, and a traction member is provided inside the housing. One end of the traction member is connected to the release arrester body, and the other end is connected to a connecting part. When the thermal explosion mechanism of the release assembly is activated, the connecting part pulls the arrester body through the traction member. The connecting part includes: a mounting cylinder, which is disposed at the bottom of the housing and connected to the mating part; The movable part is located inside the housing and is slidably connected to the mounting cylinder, with one end of it extending into the cavity connected to the thermal explosion tube; The hook-on part is provided with an abutment component, which is connected to the mounting cylinder. When the abutment component is under pressure, the moving part is in an upward state. A push assembly is provided between the disconnection component and the surge arrester body. The push assembly is in contact with the moving part. When the moving part moves upward, the surge arrester body is pushed upward by the push assembly. The jacking assembly includes: a connecting block, which is fixedly connected to the surge arrester body; The elastic connector is located in the movable chamber inside the connecting block and is slidably connected to the movable chamber. One end of the connector extending out of the connecting block is fixedly connected to the body of the release device. The movable part is located below the connecting block, with one end connected to the connecting block and the other end in contact with the moving part; The abutting component includes: a pressing part, one end of which is connected to the hanging part via a bracket, and the other end abutting against the mating part; The connecting tube has one end connected to the extrusion section and the other end connected to the mounting cylinder; The docking component includes: a docking block, on which a hanging rod is provided, and which is connected to the hanging part through the hanging rod; The first connector has one end connected to the docking block and the other end fixedly connected to the release device body; The second connector has one end connected to the mating block and the other end fixedly connected to the mounting cylinder; One end of the pulling member is fixed to the body of the release device, and the other end is connected to the second connecting member through the connecting part.

2. The composite zinc oxide detachable surge arrester according to claim 1, characterized in that, The thermal explosion element includes: a cavity disposed within the body of the detacher, a resistive element disposed inside the cavity, conductive electrode plates disposed at both ends of the resistive element, a discharge gap thermal explosion tube disposed below the resistive element and connected to the connecting part; when the thermal explosion mechanism is activated, the thermal explosion tube pushes the connecting part to detach from the detachment assembly.

3. The composite zinc oxide detachable surge arrester according to claim 1, characterized in that, The mounting part includes a connecting plate disposed at the bottom of the insulating column, and the connecting plate is provided with a hook, which is connected to the docking block; The extrusion part is located at the connection between the connecting plate and the hook, and the extrusion part abuts against the docking block.

4. The composite zinc oxide detachable surge arrester according to claim 1, characterized in that, The conductive component includes a conductive base disposed on top of an insulating pillar, a voltage-conducting plate disposed below the conductive base, and an elastic element disposed between the voltage-conducting plate and the conductive base.

5. The composite zinc oxide detachable surge arrester according to claim 4, characterized in that, The lower surface of the voltage-conducting plate is provided with a groove.

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