Composite zinc oxide detachable lightning arrester

Abstract

The invention relates to the technical field of lightning arresters, in particular to a composite zinc oxide detachable lightning arrester which comprises an insulating column, a conductive assembly and a hanging part are arranged at the two ends of the insulating column respectively, a lightning arrester body is arranged between the conductive assembly and the hanging part, a disconnector body is arranged at the bottom of the lightning arrester body, and a thermal explosion element is arranged in the disconnector body. The separation assembly enables the lightning arrester body to be separated from the power grid through a thermal explosion mechanism, and forms a visible disconnection identifier; a shell is arranged at the bottom of the disconnector body, a traction piece is arranged in the shell, and the two ends of the traction piece are connected with the disconnector body and the connecting part respectively; by arranging the connecting part and the traction piece, after the thermal explosion mechanism is started, the connecting part can exert a traction effect on the lightning arrester body through the traction piece, so that the lightning arrester body synchronously obtains a downward extra traction force, and the situation that the lightning arrester body is damaged due to the fact that the conductive head and the conductive pressing plate are combined too tightly is avoided. And therefore, the lightning arrester body cannot be quickly separated.

Description

Technical Field

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

[0002] The removable arrester is an adaptable modification of a distribution-type zinc oxide arrester and its installation on the drop mechanism of a drop-out fuse. This design allows maintenance personnel to conveniently inspect, maintain, and replace the arrester using an insulated switch lever without disconnecting the power supply. This design not only ensures the continuous and stable operation of power lines but also significantly reduces the workload and work time of maintenance personnel.

[0003] However, in actual operation, traditional drop-type arresters carry the risk of accidental detachment during the drop operation. Specifically, during the arrester's drop, the impact of the fall can easily cause the arrester to separate from the insulator, causing the hanging rod to disengage from the hanging slot, causing the arrester to fall. This accidental fall could not only injure pedestrians but also damage surrounding objects.

[0004] The technical solution of Chinese patent application number 202110888691.3 discloses a drop-type lightning arrester for a power supply line, including an insulating cylinder, a hole plate installed on the insulating cylinder, the bottom end of the insulating cylinder is installed on the base, and a conductive seat is provided on the top of the insulating cylinder. The right side of the bottom of the conductive seat is provided with a lightning arrester body, and the bottom end of the lightning arrester body is installed with a disconnector; when the lightning arrester body falls, the lightning arrester body can be supported by a fixed box, and during the supporting process, the bottom end of the second conductive plate contacts the top end of the two first conductive plates. At this time, a loop is formed between the first conductive plate, the battery, the transmitter and the second conductive plate. At this time, the transmitter can transmit the signal to the signal room through the wireless network, and the specific location of the lightning arrester body can be clearly known through the GPS locator, so that the staff can inspect and maintain the lightning arrester body in time.

[0005] Although the aforementioned patented technical solution uses a fixed box to support the arrester body, effectively avoiding the problem of the hanging rod of the arrester body falling out of the hanging slot, in actual engineering applications, the existing detachable arrester still exposes several technical difficulties that need to be overcome.

[0006] First, the existing detachable arrester's release mechanism relies on the arrester's own gravity to achieve downward release. However, the arrester and the conductor plate, exposed to complex outdoor environments for extended periods, are inevitably subject to environmental erosion and corrosion. When the disconnector is activated, the top of the arrester and the conductor plate may occasionally become too tightly bonded to each other, preventing them from releasing quickly. If this anomaly is not promptly addressed, it will trigger a series of more serious, subsequent chain reactions, posing a threat to the safe and stable operation of the power system.

[0007] Secondly, during the installation of the arrester body, the elastic contacts or springs of the conductive plate are susceptible to metal fatigue under long-term pressure. Furthermore, adverse environmental factors such as moisture and contaminants can accelerate the corrosion of the elastic contacts or springs, significantly reducing their resilience. If the clamping force is insufficient, the arrester body may rock back and forth during use, causing arcing between the arrester body and the conductive plate. Furthermore, in strong winds, the arrester body can oscillate horizontally, causing the contact point between the conductive plate and the arrester body to shift. This causes the original contact surfaces to separate, generating an arc at the moment of disconnection. However, as the arrester body swings back, contact may re-establish, resulting in periodic discharge. This intermittent arcing is more hazardous than a steady arc. Each time the arrester body disconnects, the air ionization has not yet fully dissipated, reducing the restrike voltage. This leads to a sharp increase in the frequency of discharges, accelerating the erosion process and shortening the equipment's service life. Summary of the Invention

[0008] The object of the present invention is to provide a composite zinc oxide detachable lightning arrester to solve the technical problems raised in the above background technology.

[0009] To achieve the above object, the present invention provides the following technical solutions: A composite zinc oxide detachable lightning arrester comprises an insulating column, with a conductive component and a hanging portion provided at both ends thereof; The arrester body has a top connected to the conductive assembly via a conductive head, and a bottom connected to the hanging portion via a docking piece; A disconnect assembly includes a disconnector body disposed between the arrester body and the attachment portion. The disconnector body includes a thermal explosion element. When the power frequency leakage current of the arrester body increases abnormally, the disconnect assembly disconnects the arrester body from the power grid through a thermal explosion mechanism, forming a visible disconnection mark. The traction assembly includes a shell connected to the disconnector body, a pulling piece is provided in the shell, one end of the pulling piece is connected to the disconnector body, and the other end is connected to a connecting part; when the thermal explosion mechanism of the disconnector assembly is activated, the connecting part pulls the lightning arrester body through the pulling piece.

[0010] Preferably, the thermal explosion element comprises: The cavity is set in the body of the disconnector, and a resistor is provided inside the cavity. The upper and lower ends of the resistor are provided with conductive electrodes, and there is a discharge gap between the two conductive electrodes. The thermal explosion tube is arranged below the resistor and connected to the connecting portion. When the thermal explosion mechanism is activated, the thermal explosion tube pushes the connecting portion to disengage from the connection with the disengagement component.

[0011] Preferably, the connecting portion includes: an installation cylinder, which is arranged at the bottom of the shell and connected to the docking piece; The moving part is arranged inside the shell and is slidably connected with the mounting tube. One end of the moving part extending into the cavity is connected with the thermal explosion tube.

[0012] Preferably, the hanging portion is provided with an abutment assembly, the abutment assembly is connected to the mounting cylinder, and when the abutment assembly is in a compressed state, the moving member is in an upward moving state; A pushing assembly is provided between the separation assembly and the arrester body. The pushing assembly is in contact with the moving part. When the moving part moves upward, the arrester body is pushed upward by the pushing assembly.

[0013] Preferably, the pushing assembly comprises: A connecting block, which is fixedly connected to the arrester body; An elastic connector is located in the movable chamber inside the connecting block and is in limited sliding connection with the movable chamber, and one end of the elastic connector extends out of the connecting block and is fixedly connected to the disconnector body; The movable part is located below the connecting block, one end of which is connected to the connecting block and the other end of which is in contact with the movable part.

[0014] Preferably, the abutment assembly comprises: An extrusion portion, one end of which is connected to the hanging portion through a bracket and the other end of which is in contact with the docking member; The connecting tube has one end connected to the extrusion portion and the other end connected to the mounting tube.

[0015] Preferably, the docking member comprises: A docking block is provided with a hooking rod and is connected to the hooking portion via the hooking rod; a first connecting member, one end of which is connected to the docking block and the other end of which is fixedly connected to the disconnector body; The second connecting piece has one end connected to the docking block and the other end fixedly connected to the mounting tube.

[0016] Preferably, the hanging portion includes a connecting plate arranged at the bottom of the insulating column, the connecting plate is provided with a hook, and the hook is connected to the docking block; The extrusion portion is arranged at the connection between the connecting plate and the hook, and the extrusion portion abuts against the docking block.

[0017] Preferably, the conductive assembly includes a conductive seat arranged on the top of the insulating column, a conductive voltage plate is provided below the conductive seat, and an elastic member is provided between the conductive voltage plate and the conductive seat.

[0018] Preferably, a groove is provided on the lower surface of the conductive plate.

[0019] Technical effects and advantages of the present invention: 1. The present invention provides a movable member and a pulling member. When the arrester body is damaged by multiple lightning strikes or aging, and a thermal burst tube explodes, generating a strong impact force, the pulling member is fixed to the disconnector body at one end and connected to the second connecting member via a connecting portion. At the moment of explosion, the connecting portion applies a pulling action on the disconnector body through the pulling member, causing the arrester body to simultaneously receive additional downward traction. This traction effectively prevents the arrester body from being unable to quickly detach due to the tight connection between the conductive head and the conductive plate, ensuring that the arrester can be reliably separated in the event of a fault, thus safeguarding the safe and stable operation of the power system.

[0020] 2. The present invention provides a moving part and a pulling part. When the pressure of the conductive plate on the conductive head is insufficient and the arrester body shakes in severe weather such as strong winds, the docking block squeezes the extrusion portion, and the medium enters the installation tube through the connecting pipe, pushing the moving part upward, thereby causing the connecting block connected to the arrester body to move upward, thereby increasing the length of the arrester body in disguise, strengthening the connection strength between the conductive head and the conductive plate, and effectively preventing the arrester body from shaking. At the same time, the upward movement of the moving part compresses the empty space in the cavity, causing the gas pressure to rise sharply when the thermal explosion tube explodes, thereby increasing the pulling force on the arrester body and ensuring its reliable separation in the event of a fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 Schematic diagram of the main structure of the stabilizing assembly of the present invention; Figure 3 This is a schematic diagram of the connection structure between the separation component and the traction component of the present invention; Figure 4 It is a structural schematic diagram of the separation component of the present invention; Figure 5 is a schematic cross-sectional view of a traction assembly of the present invention; Figure 6 For the present invention Figure 5 Schematic diagram of the enlarged structure at A in the middle; Figure 7 This is a schematic diagram of the state of the detachment component of the present invention when it is detached; Figure 8Schematic diagram of the working principle of the separation component of the present invention.

[0022] In the picture: 1. Insulation column; 2. Conductive component; 201. Conductive seat; 202. Conductive plate; 203. Elastic member; 3. Hanging part; 301. Connecting plate; 302. Hook; 4. Disconnection assembly; 401. Disconnector body; 402. Cavity; 403. Conductive electrode; 404. Resistor; 405. Thermal explosion tube; 5. Pulling assembly; 501. Housing; 502. Pulling member; 503. Connecting portion; 5031. Mounting cylinder; 5032. Moving member; 6. Docking member; 601. Docking block; 602. First connecting member; 603. Second connecting member; 7. Abutment assembly; 701. Extrusion portion; 702. Connecting pipe; 8. Push assembly; 801. Connecting block; 802. Elastic connecting piece; 803. Movable piece; 9. Arrester body; 10. Conductive head. DETAILED DESCRIPTION

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0024] Example 1 Reference Figures 1 to 8 As shown, the present invention provides a composite zinc oxide detachable lightning arrester, including an insulating column 1, with a conductive component 2 and a hanging part 3 at both ends of the insulating column 1, and an arrester body 9 is provided between the conductive component 2 and the hanging part 3.

[0025] The top of the arrester body 9 is connected to the conductive component 2 through the conductive head 10 , and the bottom of the arrester body 9 is connected to the hanging part 3 through the docking piece 6 .

[0026] The conductive assembly 2 includes a conductive base 201 disposed on the top of the insulating column 1 , a conductive plate 202 is disposed below the conductive base 201 , an elastic member 203 is disposed between the conductive plate 202 and the conductive base 201 , and a groove is disposed on the lower surface of the conductive plate 202 .

[0027] The hanging portion 3 includes a connecting plate 301 arranged at the bottom of the insulating column 1 , and a hook 302 is provided on the connecting plate 301 .

[0028] The docking member 6 includes a docking block 601, which is provided with a hooking rod connected to the hook 302, and a first connecting member 602 and a second connecting member 603 connected to the lightning arrester body 9. A separation component 4 is provided between the first connecting member 602 and the second connecting member 603.

[0029] The disconnection component 4 includes a disconnector body 401 connected to the lightning arrester body 9, a cavity 402 is provided in the disconnector body 401, a resistor 404 is provided inside the cavity 402, and conductive electrodes 403 are provided at the upper and lower ends of the resistor 404, and a discharge gap exists between the two conductive electrodes 403; a thermal explosion tube 405 is provided below the resistor 404. When the power frequency leakage current of the lightning arrester body 9 increases abnormally, the current will break through the discharge gap between the conductive electrodes 403, thereby triggering the action of the thermal explosion tube 405, thereby realizing the disconnection operation of the lightning arrester body 9 and the conductive component 2.

[0030] In this embodiment, one end of the first connecting member 602 and the second connecting member 603 close to the docking block 601 is rotatably connected to the docking block 601, and one end of the first connecting member 602 and the second connecting member 603 close to the arrester body 9 is fixedly connected to the arrester body 9.

[0031] In actual application, the staff will hang the hook rod of the docking block 601 on the hook 302, and then deflect the arrester body 9 to make the conductive head 10 on the arrester body 9 accurately dock with the groove on the conductive voltage plate 202, thereby completing the installation of the arrester body 9. After installation, the arrester body 9 is located between the conductive component 2 and the hanging part 3. The specific installation position can be referred to Figure 1 and Figure 2 shown.

[0032] When encountering lightning strikes or operational overvoltage conditions, the zinc oxide resistor inside the arrester body 9 will quickly change from a high resistance state to a low resistance state, effectively conducting the overvoltage current into the ground, thereby protecting the back-end equipment.

[0033] If the arrester body 9 is damaged internally due to factors such as repeated lightning strikes or aging, the continuous power-frequency short-circuit current flowing through the cavity 402 will generate an arc in the discharge gap between the conductive electrodes 403. The arc energy will rapidly heat the thermal squib 405. When the temperature rises to approximately 160°C, the thermal squib 405 will cause a controlled explosion. The impact force generated by the explosion will push the second connector 603 to disconnect from the arrester body 9.

[0034] When the second connector 603 is disconnected from the arrester body 9, the stable connection between the arrester body 9 and the docking member 6 is broken. At this point, the arrester body 9 falls under the action of gravity (the falling process is similar to the falling of a fuse tube), forming a clear isolation fracture.

[0035] The arrester body 9 after detachment is either suspended in the air or falls to the ground, providing a visible fault signal to the operation and maintenance personnel, facilitating their rapid location and replacement.

[0036] Example 2 Although the above embodiment realizes the separation operation of the arrester body 9 from the power grid by the thermal explosion mechanism of the separation component 4, the separation mechanism mainly relies on the gravity of the arrester body itself to achieve the separation by falling downward. However, the arrester body and the conductive plate 202 that are in a complex outdoor environment for a long time will inevitably be eroded by the environment and rust will occur. When the disconnector starts working, occasionally the top of the arrester body and the conductive plate 202 are too tightly combined and cannot be quickly separated. In view of this, technical improvements are made on the basis of Example 1, and the improved technical solution is as follows.

[0037] Reference Figures 1 to 8 As shown, the present invention provides a composite zinc oxide detachable lightning arrester, including a traction component 5 arranged below a separation component 4.

[0038] The pulling assembly 5 includes a housing 501 connected to the disconnector body 401. A pulling member 502 is provided within the housing 501. One end of the pulling member 502 is fixedly connected to the disconnector body 401, and the other end is connected to a connecting portion 503. When the thermal explosion mechanism of the disconnector assembly 4 is activated, the connecting portion 503 pulls the arrester body 9 through the pulling member 502. The connecting portion 503 is connected to a second connecting member 603.

[0039] The puller 502 is made of steel wire or other high-strength guide wire. One end of the steel wire is firmly fixed to the disconnector body 401 by welding, and the other end is also tightly connected to the connecting part 503 by welding, thereby ensuring the stability of the puller 502 in the system.

[0040] It should be noted that the disconnector body 401 in this embodiment is made of explosion-proof material. A through-hole is provided at the bottom of the disconnector body 401, connecting it to the housing 501. When the thermal explosion tube 405 is activated, the energy generated by its explosion, while powerful, does not cause explosive damage to the explosion-proof disconnector body 401. This energy enters the housing 501 through the bottom through-hole, thereby disconnecting the housing 501 from the disconnector body 401.

[0041] When the arrester body 9 is damaged internally due to factors such as repeated lightning strikes or aging, the continuous power-frequency short-circuit current generates an arc in the discharge gap between the conductive electrodes 403. The arc energy rapidly accumulates and heats the thermal squib 405, causing it to explode in a controlled manner. The powerful impact force generated by the explosion of the thermal squib 405 is transmitted through the through hole into the housing 501, pushing the housing 501 apart from the disconnector body 401.

[0042] At the same time, the energy generated by the explosion will also push the connection part 503 away from the disconnector body 401. However, since the two ends of the pulling member 502 are fixedly connected to the connection part 503 and the disconnector body 401 respectively, at the moment of the explosion, the connection part 503 will exert a pulling effect on the disconnector body 401 through the pulling member 502. In view of the fact that the disconnector body 401 is fixedly connected to the arrester body 9, and the explosion energy of the thermal explosion tube 405 will not cause damage to the disconnector body 401, when the connection part 503 pulls the disconnector body 401 through the pulling member 502, the arrester body 9 will simultaneously obtain an additional downward traction force. This additional traction force can effectively avoid the situation where the arrester body 9 cannot be quickly detached due to the conductive head 10 being too tightly combined with the conductive voltage plate 202, thereby ensuring the reliable separation of the arrester in the event of a fault.

[0043] Example 3 Although the above embodiment achieves the rapid separation of the arrester body 9 by the traction force generated by the pulling member 502 during the explosion, when the pressing force of the conductive plate 202 on the conductive head 10 is insufficient, under strong wind conditions, the arrester body will swing back and forth, causing the contact point between the conductive plate 202 and the arrester body to shift, and an arc will be generated when the original contact surface separates. When it swings back, it may re-contact, forming a periodic discharge. This intermittent arc is more harmful, the discharge frequency increases, and it will accelerate the ablation of the equipment and shorten the service life. In view of this, technical improvements are made on the basis of Example 2, and the improved technical solution is as follows.

[0044] Reference Figures 3 to 7 As shown, the connecting portion 503 includes a mounting tube 5031 arranged at the bottom of the shell 501, and the mounting tube 5031 is connected to the second connecting member 603; a thread is provided on the outside of the mounting tube 5031, and the second connecting member 603 is fixedly connected to the mounting tube 5031 through a nut.

[0045] A moving member 5032 is provided inside the housing 501 . The moving member 5032 is slidably connected to the mounting tube 5031 . One end of the moving member 5032 extending into the cavity 402 is connected to the thermal explosion tube 405 .

[0046] Reference Figures 1 to 8As shown, the hanging portion 3 is provided with an abutment assembly 7, which is connected to the mounting cylinder 5031. When the abutment assembly 7 is in a compressed state, the moving member 5032 is in an upward moving state; A pushing assembly 8 is provided between the separation assembly 4 and the arrester body 9 . The pushing assembly 8 is in contact with the moving member 5032 . When the moving member 5032 moves upward, the arrester body 9 is pushed upward by the pushing assembly 8 .

[0047] Reference Figures 4 to 7 As shown, the pushing assembly 8 includes a connecting block 801 fixedly connected to the lightning arrester body 9, a movable chamber is provided on the connecting block 801, and an elastic connecting member 802 with a limited sliding connection is provided in the movable chamber, and one end of the elastic connecting member 802 extends out of the connecting block 801 and is fixedly connected to the disconnector body 401; a movable member 803 is provided below the connecting block 801, one end of the movable member 803 is connected to the connecting block 801, and the other end of the movable member 803 is in contact with the moving member 5032.

[0048] The elastic connecting member 802 includes a movable block that is limitedly slidably connected to the movable chamber, a spring is provided between the movable block and the movable chamber, and a fixed rod fixedly connected to the movable block is provided in the middle of the spring. One end of the fixed rod extends out of the connecting block 801 and is fixedly connected to the disconnector body 401.

[0049] In this embodiment, the cross-section of the moving member 5032 is in the shape of a cross. The horizontal portion of the moving member 5032 contacts the movable member 803. One end of the vertical portion of the moving member 5032 extends into the cavity 402 through the through hole and is connected to the thermal explosion tube 405. The other end of the vertical portion of the moving member 5032 is sealed and slidably connected to the mounting tube 5031 via a rubber ring. The outer surface of the vertical portion of the moving member 5032 fits in contact with the inner ring of the through hole.

[0050] Reference Figure 2 As shown, the abutting assembly 7 includes an extrusion portion 701 connected to the hanging portion 3 through a bracket, and the extrusion portion 701 abuts against the docking member 6; a connecting pipe 702 is provided between the extrusion portion 701 and the installation tube 5031.

[0051] The extrusion portion 701 is primarily composed of an elastic bellows equipped with a one-way air inlet valve. One end of the connecting tube 702 is connected to the elastic bellows, while the other end is fixedly connected to the mounting tube 5031. A one-way air inlet valve is also provided at the junction of the connecting tube 702 and the mounting tube 5031. As the arrester body 9 reciprocates, the docking block 601 exerts an extrusion force on the extrusion portion 701, forcing the medium within the extrusion portion 701 into the interior of the mounting tube 5031, thereby pushing the movable member 5032 upward. The method of conveying the medium into the container by squeezing the extrusion portion 701 is a well-established technique and will not be further elaborated herein.

[0052] In actual use scenarios, when the spring on the conductive pressure plate 202 experiences metal fatigue or encounters strong winds, the lightning arrester body 9 may produce a back-and-forth shaking condition. Since the docking block 601 is fixed with the second connecting piece 603 through the first connecting piece 602 and the lightning arrester body 9, when the lightning arrester body 9 shakes, the docking block 601 reciprocally presses the extrusion part 701. After the extrusion part 701 is pressed, the connecting pipe 702 injects the medium into the inside of the mounting cylinder 5031. As the pressure inside the mounting cylinder 5031 gradually increases, it pushes the vertical part of the moving piece 5032 to move upward. In the process of the moving piece 5032 moving upward, the horizontal part of the moving piece 5032 is pushed upward by the movable piece 803 and the connecting block 801 fixedly connected with the lightning arrester body 9, thereby increasing the length of the lightning arrester body 9. This process increases the connection strength between the conductive head 10 on the lightning arrester body 9 and the conductive pressure plate 202, effectively avoiding the phenomenon that the lightning arrester body 9 shakes back and forth due to insufficient pressing force of the conductive pressure plate 202 on the conductive head 10.

[0053] It should be particularly noted that the connecting block 801 is fixedly connected with the disengager 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 extends from the active chamber to provide a certain margin for the upward movement of the connecting block 801, ensuring smooth operation of the entire process.

[0054] In the process of the vertical part of the moving piece 5032 moving upward, the part of the moving piece 5032 entering the cavity 402 gradually increases, thereby compressing the empty space in the cavity 402. When the thermal detonator 405 explodes, due to the decrease of the area of the empty space in the cavity 402, the gas pressure generated by the explosion sharply rises in a short time, and the energy of the explosion acting on the moving piece 5032 also synchronously increases. This synchronously enhances the pulling force of the moving piece 5032 on the lightning arrester body 9 through the pulling piece 502, effectively avoiding the situation that the pulling force of the pulling piece 502 on the lightning arrester body 9 is insufficient to pull the lightning 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.

[0055] In addition, since the connecting part 503 is fixedly connected with the disengager 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 lightning arrester body 9 laid in urban areas or densely populated areas, which can effectively avoid the adverse effects of splashed fragments on human safety.

[0056] Finally, it should be noted that the above only describes the preferred embodiments 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 will appreciate that modifications, substitutions and changes can be made to the technical solutions described in the foregoing embodiments, or some of the technical features thereof can be equivalently replaced, and any modifications, equivalently replaced, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0057] Although embodiments of the present application have been shown and described, those of ordinary skill in the art will appreciate that various changes, modifications, substitutions, and alterations can be made to the 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 lightning arrester, comprising an insulating column, with a conductive component and a hanging portion provided at both ends thereof, characterized in that: The arrester body has a top connected to the conductive assembly via a conductive head, and a bottom connected to the hanging portion via a docking piece; A disconnect assembly includes a disconnector body disposed between the arrester body and the attachment portion. The disconnector body includes a thermal explosion element. When the power frequency leakage current of the arrester body increases abnormally, the disconnect assembly disconnects the arrester body from the power grid through a thermal explosion mechanism, forming a visible disconnection mark. The traction assembly includes a shell connected to the disconnector body, a pulling piece is provided in the shell, one end of the pulling piece is connected to the disconnector body, and the other end is connected to a connecting part; when the thermal explosion mechanism of the disconnector assembly is activated, the connecting part pulls the lightning arrester body through the pulling piece.

2. The composite zinc oxide detachable arrester according to claim 1, characterized in that: Thermal explosion components include: The cavity is set in the body of the disconnector, and a resistor is provided inside the cavity. The upper and lower ends of the resistor are provided with conductive electrodes, and there is a discharge gap between the two conductive electrodes. The thermal explosion tube is arranged below the resistor and connected to the connecting portion. When the thermal explosion mechanism is activated, the thermal explosion tube pushes the connecting portion to disengage from the connection with the disengagement component.

3. The composite zinc oxide detachable arrester according to claim 1, characterized in that: The connecting portion includes: an installation cylinder, which is arranged at the bottom of the shell and connected to the docking piece; The moving part is arranged inside the shell and is slidably connected with the mounting tube. One end of the moving part extending into the cavity is connected with the thermal explosion tube.

4. The composite zinc oxide detachable arrester according to claim 3, characterized in that: The hanging portion is provided with an abutment assembly, which is connected to the mounting tube. When the abutment assembly is in a compressed state, the moving part is in an upward moving state. A pushing assembly is provided between the separation assembly and the arrester body. The pushing assembly is in contact with the moving part. When the moving part moves upward, the arrester body is pushed upward by the pushing assembly.

5. The composite zinc oxide detachable arrester according to claim 4, characterized in that: The push assembly includes: A connecting block, which is fixedly connected to the arrester body; An elastic connector is located in the movable chamber inside the connecting block and is in limited sliding connection with the movable chamber, and one end of the elastic connector extends out of the connecting block and is fixedly connected to the disconnector body; The movable part is located below the connecting block, one end of which is connected to the connecting block and the other end of which is in contact with the movable part.

6. The composite zinc oxide detachable arrester according to claim 4, characterized in that: The abutment assembly comprises: An extrusion portion, one end of which is connected to the hanging portion through a bracket and the other end of which is in contact with the docking member; The connecting tube has one end connected to the extrusion portion and the other end connected to the mounting tube.

7. The composite zinc oxide detachable arrester according to claim 6, characterized in that: The docking piece includes: A docking block is provided with a hooking rod and is connected to the hooking portion via the hooking rod; a first connecting member, one end of which is connected to the docking block and the other end of which is fixedly connected to the disconnector body; The second connecting piece has one end connected to the docking block and the other end fixedly connected to the mounting tube.

8. The composite zinc oxide detachable arrester according to claim 7, characterized in that: The hanging part includes a connecting plate arranged at the bottom of the insulating column, the connecting plate is provided with a hook, and the hook is connected to the docking block; The extrusion portion is arranged at the connection between the connecting plate and the hook, and the extrusion portion abuts against the docking block.

9. The composite zinc oxide detachable arrester according to claim 1, characterized in that: The conductive assembly includes a conductive seat arranged on the top of the insulating column, a conductive voltage plate is arranged below the conductive seat, and an elastic member is arranged between the conductive voltage plate and the conductive seat.

10. The composite zinc oxide detachable arrester according to claim 9, characterized in that: A groove is provided on the lower surface of the conductive plate.

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