Circuit lightning protection device convenient to maintain

Abstract

The invention relates to the technical field of circuit lightning protection, and provides a circuit lightning protection device convenient to maintain, which comprises a mounting seat, four plugging grooves are formed in the upper part of the front side of the mounting seat, a shell is arranged in each plugging groove, a wire inlet for connecting an equipment line is formed in the top end of each shell, and a wire outlet for connecting the equipment line is formed in the top end of each shell. The bottom end of the mounting seat is provided with a wire inlet which is connected with a ground wire used for guiding high-voltage lightning current, and the wire inlet is connected with the mounting groove through a fixing assembly, so that the fixation of a line can be quickly relieved by unfastening the fixing assembly. According to the lightning protection device, in the maintenance and replacement process of the lightning protection device through the modular design, the shell and internal equipment are pulled out, detached and replaced in a modular mode, overall replacement is not needed, the maintenance cost is reduced, and through cooperation with quick unlocking of the module and one-key removal of equipment line fixation after the first piezoresistor is burnt out, the lightning protection device is convenient to maintain and replace. And the maintenance and replacement speed and convenience of the lightning protection device are greatly improved.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit lightning protection, and specifically relates to a circuit lightning arrester that is convenient for maintenance. Background Art

[0002] A surge protector, also called a lightning arrester, is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When a peak current or voltage suddenly occurs in an electrical circuit or communication line due to external interference, the surge protector can conduct and shunt in an extremely short time, thereby avoiding damage to other devices in the circuit caused by the surge.

[0003] Traditional surge protector type lightning arresters are usually of an integrated design. This results in the inability to repair the surge protector type lightning arrester after it is damaged, and only maintenance and replacement can be carried out. This greatly increases the maintenance and repair costs, and affects the repair efficiency and convenience of repair. Circuit maintenance staff need to consume more time and energy for circuit maintenance work. Therefore, a circuit lightning arrester that is convenient for maintenance is needed. Summary of the Invention

[0004] In view of the deficiencies of the prior art, the present invention provides a circuit lightning arrester that is convenient for maintenance, and solves the problem that traditional integrated surge protector type lightning arresters cannot be repaired after being damaged, and only maintenance and replacement can be carried out, which greatly increases the maintenance and repair costs, and affects the repair efficiency and convenience of repair.

[0005] To achieve the above objectives, the present invention is realized through the following technical solutions:

[0006] A circuit lightning arrester that is convenient for maintenance, comprising:

[0007] A mounting base, four insertion slots are provided above the front side of the mounting base, a housing is arranged inside the insertion slots, an inlet for accessing device lines is installed at the top end of the housing, an outlet for connecting a ground wire for guiding high-voltage lightning current is installed at the bottom end of the mounting base, and the inlet is connected to the mounting slot through a fixing component to quickly release the fixation of the line by unlocking the fixing component;

[0008] A support frame fixedly connected to the inside of the shell, two varistors for guiding current when struck by lightning are installed on the front side of the middle end of the support frame, a choke coil is arranged on the top side of the varistor, an insulating protective sleeve is arranged on the outer wall of the choke coil, the input end of the choke coil is connected to the line inlet to guide the high-voltage lightning current through the choke coil to effectively suppress the common-mode interference signal, an electric socket is arranged at the output end of the choke coil, a rotating seat is arranged on the side close to the choke coil and the two electric sockets, one end of the switching member sleeved on the outer wall thereof is slidably connected to the outer wall of the electric socket, and the other end of the switching member abuts against the input end of one of the varistor one, so that one of the electric sockets and the choke coil form a series current, and a fuse support member for switching the connection line is arranged on the right side of the switching member;

[0009] A first electrical terminal, the first electrical terminal is installed on the bottom side of the housing, the first electrical terminal input is connected to the two first varistors through a circuit protection component, the first electrical terminal output is electrically connected to a second electrical terminal, the four second electrical terminals are located inside the bottom end of the mounting base, and are connected through a fifth conductive sheet, and the fifth conductive sheet is connected to the outlet;

[0010] Two mirror images are provided with limit members, which are located on the rear side of the support frame. The bottom side of the support frame is rotatably connected with a rotating seat. The separated ends of the two limit members penetrate the outer wall of the shell and are clamped in the limit grooves provided on the inner wall of the installation groove. The separated sides of the two rotating seats are connected to the inner wall of the shell through spring three. The adjacent sides of the two rotating seats are provided with a fuse fixing seat to cooperate with spring three to make the limit member disengage from the limit groove after melting.

[0011] Preferably, the line inlet includes a wiring port 1 arranged on the top side of the inner wall of the shell, the outer wall of the wiring port 1 is slidably connected with a sliding sleeve, the sliding sleeve is connected to the adjacent side of the wiring port 1 through a spring 1, a power connection plate 1 is arranged inside the wiring port 1, a spring 2 is arranged on the adjacent side of the power connection plate 1 and the bottom end of the power connection plate 1 is slidably connected to the input end of the choke coil, the front side of the sliding sleeve passes through the outer wall of the shell, and the middle end is threadedly connected with a clamping bolt 1, and the rear side of the clamping bolt 1 sequentially passes through the rear side of the sliding sleeve and the front side of the inner wall of the wiring port 1, and abuts against the front side of the power connection plate 1.

[0012] Preferably, the outlet includes a second wiring port arranged on the bottom side of the mounting base, a second power connection plate is arranged inside the second wiring port, the top of the second power connection plate is slidably connected to the bottom end of the conductive plate 5, and a second clamping bolt is threadedly connected to the front side of the second wiring port, and the second clamping bolt abuts against the front side of the second power connection plate.

[0013] Preferably, the fixing component includes two clamping members respectively and slidably connected to both ends of the top inner wall of the installation groove. Clamping grooves are formed on both the left and right sides of the sliding sleeve. The adjacent sides of the two clamping members penetrate through the outer wall of the housing and are arranged inside the clamping grooves. Elastic pieces II are arranged on the separated sides of the two clamping members.

[0014] Preferably, the fusing support member includes a torsion spring arranged on the right side of the rotating seat. The bottom end of the torsion spring is connected to the lower right side of the switching member. A fusing trigger member I is fixedly connected to the adjacent sides of the switching member and the support frame.

[0015] Preferably, the circuit protection component includes a suppression diode and a gas discharge tube installed on the bottom side of the inner wall of the installation seat. The suppression diode and the gas discharge tube are connected by a conductive sheet I. The output end of the gas discharge tube and the power connection end point I are connected by a conductive sheet III. The input end of the suppression diode is connected to the output ends of the two varistors I by a conductive sheet II.

[0016] Preferably, the fusing fixing seat includes a fusing trigger member II fixedly connected to the rear side of the support frame. The left and right ends of the fusing trigger member II are fixedly connected to the rotating seat. A varistor II is installed in the middle of the bottom side of the fusing trigger member II. The input end of the varistor II and the output end of the other varistor I are connected by a conductive sheet IV.

[0017] Preferably, an elastic piece I is arranged on the top side of the limiting member. The bottom side of the elastic piece I abuts against the top side of the limiting member. The top end of the elastic piece I is fixedly connected to the rear side of the support frame.

[0018] Preferably, a cable fixing member is fixedly connected to the outer periphery of the top side of the housing. A limiting protrusion is arranged at the opening of the cable fixing member.

[0019] Preferably, a pulling handle facilitating force application is fixedly connected to the front side of the outer wall of the housing.

[0020] Working principle: When the lightning arrester encounters a lightning strike, the varistor I is activated under the high voltage of the surge current generated by the lightning strike, and its resistance becomes lower to guide the current into the lightning arrester. Thus, the current sequentially passes through the connection line and the power connection piece I, reaches the choke coil to suppress the common-mode interference signal. Subsequently, the current sequentially passes through the power connection seat, the switching member, the varistor I, and the conductive sheet II to reach the suppression diode, and reaches the gas discharge tube through the conductive sheet I. The current after two voltage reductions is connected to the connected power connection end point I and power connection end point II through the conductive sheet III and introduced into the conductive sheet V, and is introduced into the ground wire abutted thereto from the power connection piece II connected to the conductive sheet V to conduct the high-voltage current into the ground.

[0021] When one of the varistors fails due to lightning strike, a short circuit will form at the switching part and the fuse trigger part 1, causing high temperature, which will cause the fuse trigger part 1 to fuse and break. As a result, the switching part loses its support. The output end of the switching part driven by the normally compressed torsion spring is connected to the input end of the other varistor 1, reconstituting a short-term protection circuit. The current is conducted into the ground wire and through the conductive sheet 4 to the varistor 2, activating the varistor 2. A short circuit occurs at the fuse trigger part 2, causing it to fuse. The rotating seat connected to the limiting part loses its support and fixation. Under the reset push of the compressed spring 3, the limiting part disengages from the limiting groove in the installation groove, causing the installation of the housing in the installation groove to become slightly loose. After the second varistor 1 is burned out, the external circuit breaker is triggered to cut off the power in a timely manner. By extending the grounding time, the high-voltage current is shared, reducing the damage caused by the backtracking of the high-voltage current to the equipment.

[0022] When replacing the protection module, pull the two clamping parts to make them disengage from the clamping grooves on the sliding sleeve, causing the compressed spring 1 and the stretched spring 2 to rebound, pushing up the sliding sleeve and the pressing bolt 1, releasing the connection and fixation of the equipment circuit and the fixation at the top of the housing. Pull out the protection module and insert a new one. Press the limiting parts on both sides of the housing of the new protection module to make them retract into the interior of the housing, causing the elastic sheet 1 to deform, and pull the two clamping parts to compress the elastic sheet 2. Then insert the protection module into the installation groove. When the limiting parts move to the limiting grooves in the installation groove, under the push of the elastic deformation recovery of the elastic sheet 1, they are snapped into the limiting grooves. Press down the sliding sleeve and the pressing bolt 1 to compress the spring 1. When the clamping grooves on the sliding sleeve and the clamping parts are at the same level, the clamping parts penetrate the housing and insert into the clamping grooves under the reset push of the compressed elastic sheet 2. Finally, place the equipment circuit into the wiring port 1 and tighten the pressing bolt 1 to press and fix the circuit with the electrical connection sheet 1, stretching the spring 2. Finally, snap the circuit into the card slot of the cable fixing part, and the repair and replacement are completed.

[0023] The present invention provides a circuit lightning arrester that is convenient for maintenance, having the following beneficial effects:

[0024] 1. In the maintenance and replacement of the lightning arrester designed in a modular form, the housing together with the internal equipment is pulled out and disassembled and replaced in the form of a module, without the need for overall replacement, reducing the maintenance cost. Combined with the quick unlocking of the module after the varistor 1 is burned out and the one-key release of the fixation of the equipment circuit, the maintenance and replacement speed and convenience of the lightning arrester are greatly improved.

[0025] 2. When one of the varistors in the present invention fails due to lightning strike, a transient protection circuit can be reconstituted to continue to play the role of guiding current, extend the time for the surge current generated by lightning strike to be introduced into the ground wire, reduce the damage caused by the backtracking of high-voltage current to the equipment, and thus improve the protection ability.

[0026] 3. Fixed by a limiting member located in the limiting groove that cannot be released externally, and cooperating with the first wiring port and the housing, the module of the present invention can be installed more firmly and stably, preventing loosening and avoiding theft by outsiders, ensuring its safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a perspective view of the present invention;

[0028] Figure 2 is a schematic separation structure diagram of the housing and the mounting base of the present invention;

[0029] Figure 3 is a schematic internal structure diagram of the housing of the present invention;

[0030] Figure 4 is a schematic structure diagram of the first wiring port of the present invention;

[0031] Figure 5 is a schematic position diagram of the second spring of the present invention;

[0032] Figure 6 is a schematic structure diagram of the rotating base of the present invention;

[0033] Figure 7 is a schematic structure diagram of the switching member of the present invention;

[0034] Figure 8 is a schematic connection structure diagram of the second conductive sheet of the present invention;

[0035] Figure 9 is a schematic structure diagram of the suppression diode and the gas discharge tube of the present invention;

[0036] Figure 10 is a schematic bottom side structure diagram of the support frame of the present invention;

[0037] Figure 11 is a schematic structure diagram of the second fusing trigger member of the present invention;

[0038] Figure 12 is a schematic structure diagram of the clamping member of the present invention;

[0039] Figure 13 is a schematic internal structure diagram of the bottom end of the mounting base of the present invention;

[0040] Figure 14 is a schematic structure diagram of the fifth conductive sheet of the present invention;

[0041] Figure 15 This is a schematic structural diagram of the second wiring port of the present invention.

[0042] Among them, 1. Mounting base; 2. Housing; 3. Support frame; 4. First wiring port; 5. Sliding sleeve; 6. First electrical connection piece; 7. Compression bolt one; 8. First spring; 9. Second spring; 10. Cable fixing piece; 11. Choke coil; 12. Electrical connection base; 13. Rotating base; 14. Switching piece; 15. Torsion spring; 16. First varistor; 17. First fuse trigger; 18. Suppression diode; 19. Gas discharge tube; 20. First conductive piece; 21. Second conductive piece; 22. Third conductive piece; 23. First electrical connection end point; 24. Fourth conductive piece; 25. Second varistor; 26. Second fuse trigger; 27. Rotating seat; 28. Limiting piece; 29. First elastic piece; 30. Clamping piece; 31. Second elastic piece; 32. Second electrical connection end point; 33. Fifth conductive piece; 34. Second wiring port; 35. Second electrical connection piece; 36. Compression bolt two; 37. State detector. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] Embodiment:

[0045] The embodiment of the present invention provides a circuit lightning arrester that is convenient for maintenance, including:

[0046] Please refer to the attached Figure 1 - Attachment Figure 3, mounting base 1. Four plug slots are provided above the front side of the mounting base 1. A housing 2 is arranged inside the plug slots. An inlet for accessing the device circuit is installed at the top end of the housing 2. An outlet for connecting the ground wire for guiding the high-voltage lightning current is installed at the bottom end of the mounting base 1. A pulling handle for facilitating the application of force is fixedly connected to the front side of the outer wall of the housing 2. This circuit lightning arrester is designed in a modular form, splitting the traditional integrated surge protector type lightning arrester into a protection module including the housing 2 and its internal structure for connecting the device circuit, and a mounting base 1 for installing the protection module and connecting the ground wire. Since the surge protector type lightning arrester cannot be repaired after damage and can only be maintained and replaced, in the maintenance and replacement of this lightning arrester, the housing 2 together with the internal devices is pulled out and disassembled and replaced in the form of a module, without the need for overall replacement, reducing the maintenance cost. The status detector 37 at the bottom end of the mounting base 1 is electrically connected to the internal circuit fuse. By emitting an electromagnetic pulse and detecting the signal of the pulse return, it judges whether the varistor 16 in the protection module is normal. If all are normal, four corresponding green lights will light up on the detector screen. If one or more of them fail, the yellow light at the corresponding position will light up, facilitating the maintenance personnel to make a judgment.

[0047] Please refer to the attached Figure 4 , attached Figure 6 and attached Figure 7 , the support frame 3 fixedly connected inside the housing 2. Two varistors 16 for guiding the current during lightning strike are installed on the front side of the middle end of the support frame 3. A choke coil 11 is arranged on the top side of the varistor 16. An insulating protective sleeve is sleeved on the outer wall of the choke coil 11. The input end of the choke coil 11 is connected to the inlet to guide the high-voltage lightning current through the choke coil 11 to effectively suppress the common-mode interference signal. The output end of the choke coil 11 is provided with a power connection seat 12. A rotating seat 13 is arranged on the side close to the two power connection seats 12 of the choke coil 11. One end of the switching part 14 sleeved on its outer wall is slidably connected to the outer wall of the power connection seat 12. The other end of the switching part 14 abuts against the input end of one of the varistors 16, so that one of the power connection seats 12 forms a series current with the choke coil 11. A fuse support part for switching the connection circuit is arranged on the right side of the switching part 14. The fuse support part includes a torsion spring 15 arranged on the right side of the rotating seat 13. The bottom end of the torsion spring 15 is connected to the lower right side of the switching part 14. A fuse trigger part 17 is fixedly connected to the side of the switching part 14 close to the support frame 3;

[0048] Specifically, the first fusing trigger 17 is made of a lead-tin alloy containing 60% tin and 40% lead, and has a relatively low melting point and a certain strength. When one of the first varistors 16 fails due to lightning strike, a short circuit will be formed at the switching member 14 and the first fusing trigger 17, causing high temperature, which will cause the first fusing trigger 17 to melt and break, so that the switching member 14 loses its support. The output end of the switching member 14 driven by the normally compressed torsion spring 15 is connected to the input end of the other first varistor 16, reconstituting a short-term protection circuit, continuing to play the role of guiding current, prolonging the time for the surge current generated by lightning strike to be introduced into the ground wire, reducing the damage caused by the backtracking of high-voltage current to the equipment, and thus improving the protection ability.

[0049] Please refer to the attached Figure 4 , the attached Figure 5 and Figure 12 , the inlet is composed of a first wiring port 4 provided on the top side of the inner wall of the housing 2, a sliding sleeve 5 slidably connected to the outer wall of the first wiring port 4 and a first current-carrying piece 6 provided inside the first wiring port 4. The sliding sleeve 5 and the adjacent side of the first wiring port 4 are connected by a first spring 8. A second spring 9 is provided on the adjacent side of the first current-carrying piece 6 and the first wiring port 4. The bottom end of the first current-carrying piece 6 is slidably connected to the input end of the choke coil 11. The front side of the sliding sleeve 5 penetrates through the outer wall of the housing 2, and the middle part is threadedly connected with a first pressing bolt 7. The rear side of the first pressing bolt 7 sequentially penetrates through the rear side of the sliding sleeve 5 and the front side of the inner wall of the first wiring port 4 to tightly press against the front side of the first current-carrying piece 6 to tightly fix the equipment line inserted into the first wiring port 4. Clamping grooves are formed on both the left and right sides of the sliding sleeve 5. The adjacent sides of two clamping members 30 respectively slidably connected to both ends of the top of the inner wall of the installation groove penetrate through the outer wall of the housing 2 and are arranged inside the clamping grooves. Elastic pieces 31 are provided on the separated sides of the two clamping members 30. A cable fixing member 10 is fixedly connected to the outer periphery of the top side of the housing 2, and a limiting protrusion is provided at the opening of the cable fixing member 10;

[0050] Specifically, when installing and fixing the first wiring port 4, by pressing down the sliding sleeve 5 and the first compression bolt 7, the first spring 8 is compressed. When the clamping groove on the sliding sleeve 5 and the clamping member 30 are at the same horizontal level, the clamping member 30 penetrates the housing 2 and inserts into the clamping groove under the reset push of the compressed second elastic piece 31. Finally, the device circuit is placed in the first wiring port 4, and the first compression bolt 7 is tightened to make the first electrical connection piece 6 tightly press and fix the circuit, stretching the second spring 9. Finally, the circuit is clamped into the card slot of the cable fixing member 10, causing the opening to deform so that the circuit can be squeezed into the interior for fixation. After the opening is restored, the cooperation with the limiting protrusion reduces the space at the opening to limit the circuit. When disconnecting and fixing the device circuit on the protection module, the two clamping members 30 are pulled to disengage them from the clamping groove on the sliding sleeve 5, causing the compressed first spring 8 and the stretched second spring 9 to rebound, pushing up the sliding sleeve 5 and the first compression bolt 7, and quickly disconnecting and fixing the device circuit. The firmly fixed circuit can be quickly disconnected without loosening the first compression bolt 7, improving the convenience and efficiency of maintenance and replacement.

[0051] Please refer to the appendix Figure 13 - appendix Figure 15 , the first power connection end 23, the first power connection end 23 is installed on the bottom side of the housing 2. The input end of the first power connection end 23 is connected to two first varistors 16 through a circuit protection component. The output end of the first power connection end 23 is electrically fused to the second power connection end 32. The four second power connection ends 32 are located inside the bottom end of the mounting base 1 and are connected by a fifth conductive sheet 33. The fifth conductive sheet 33 is connected to the wire outlet. The wire outlet is composed of a second wiring port 34 provided on the bottom side of the mounting base 1 and a second electrical connection piece 35 provided inside the second wiring port 34. The top end of the second electrical connection piece 35 is slidably connected to the bottom end of the fifth conductive sheet 33. The front side of the second electrical connection piece 35 is tightly pressed by the second compression bolt 36 threadedly connected to the front side of the second wiring port 34 to firmly fix the ground wire inside the second wiring port 34;

[0052] Specifically, when the lightning arrester is struck by lightning, the first varistor 16 is activated under the high voltage of the surge current generated by the lightning strike, and the resistance becomes lower to guide the current into the lightning arrester. Thus, the current sequentially passes through the connection line and the first electrical connection piece 6 and reaches the choke coil 11 to suppress the common-mode interference signal. Subsequently, the current sequentially passes through the connection seat 12, the switching member 14, the first varistor 16 and the second conductive sheet 21 and reaches the suppression diode 18, and reaches the gas discharge tube 19 through the first conductive sheet 20. The current after two voltage reductions is connected to the connected first power connection end 23 and the second power connection end 32 through the third conductive sheet 22 and introduced into the fifth conductive sheet 33, and is introduced into the ground wire in contact with it from the second electrical connection piece 35 connected to the fifth conductive sheet 33, leading the high-voltage current into the ground.

[0053] Please refer to the appendix Figure 8 , appendix Figure 10 and appendixFigure 11 There are two mirror-image setting limit members 28. The limit members 28 are located at the rear side of the support frame 3. A rotating seat 27 is rotatably connected to the bottom side of the support frame 3. The separated ends of the two limit members 28 penetrate through the outer wall of the housing 2 and are clamped in the limit grooves provided on the inner wall of the installation groove. The separated sides of the two rotating seats 27 are connected to the inner wall of the housing 2 through the third spring. The bottom side of the first elastic piece 29 provided on the top side of the limit member 28 abuts against the top side of the limit member 28. The top end of the first elastic piece 29 is fixedly connected to the rear side of the support frame 3. A fusing fixing seat is provided on the adjacent sides of the two rotating seats 27. The fusing fixing seat is mainly composed of a second fusing trigger member 26 fixedly connected to the rear side of the support frame 3. The left and right ends of the second fusing trigger member 26 are fixedly connected to the rotating seat 27. A second varistor 25 is installed at the middle of the bottom side of the second fusing trigger member 26. The input end of the second varistor 25 is connected to the output end of another first varistor 16 through a fourth conductive sheet 24;

[0054] Specifically, the third spring is in a compressed state under normal conditions. The second fusing trigger member 26 is the same as the first fusing trigger member 17 and is made of lead-tin alloy, so as to cooperate with the third spring to make the limit member 28 disengage from the limit groove after fusing. When installing the protection module, the limit members 28 on both sides of the housing 2 of the protection module are pressed to retract into the interior of the housing 2, causing the first elastic piece 29 to deform, and pulling the two clamping members 30 to compress the second elastic piece 31. Then, the protection module is inserted into the installation groove. When the limit member 28 moves to the limit groove in the installation groove, under the push of the elastic deformation recovery of the first elastic piece 29, it is clamped into the limit groove, and the outside cannot release the state of the limit member 28 in the limit groove, and the housing 2 cannot be pulled out of the installation groove through this limit structure, thereby improving the firmness of the installation of the protection module. When the first varistor 16 burns out, the current is conducted to the second varistor 25 through the fourth conductive sheet 24 to activate the second varistor 25. The current is introduced into the second fusing trigger member 26 through the fourth conductive sheet 24 to cause a short circuit, causing it to fuse. The rotating seat 27 connected to the limit member 28 loses its support and fixation. Under the reset push of the compressed third spring, the limit member 28 disengages from the limit groove in the installation groove, causing a certain looseness in the installation of the housing 2 in the installation groove, releasing the restriction of the safety module, and enabling it to be removed from the installation groove, thereby further improving the installation and maintenance speed and convenience.

[0055] Please refer to the appendix Figure 8 、appendix Figure 9 As shown in the figure, the circuit protection component includes a suppression diode 18 and a gas discharge tube 19 installed on the bottom side of the inner wall of the mounting seat 1. The suppression diode 18 and the gas discharge tube 19 are connected through a first conductive sheet 20. The output end of the gas discharge tube 19 and the first power connection point 23 are connected through a third conductive sheet 22. The input end of the suppression diode 18 is connected to the output ends of the two first varistors 16 through a second conductive sheet 21;

[0056] Specifically, the suppression diode 18 and the gas discharge tube 19 are in series, used to receive the current from the varistor 16, suppress the transient voltage thereof, reduce the damage of high voltage to the lightning arrester, and enable it to be normally conducted to the ground wire. The conductive sheet 4 24 is in series with another varistor 16 after the first varistor 16 is burned out, and is in parallel with the suppression diode 18 and the gas discharge tube 19, and simultaneously conducts the work of delivering the current to the varistor 2 25 and continuing to deliver the current to the ground wire.

[0057] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A circuit lightning arrester that is convenient for maintenance, characterized in that, include: A mounting seat (1), wherein four plug-in slots are provided on the upper front side of the mounting seat (1), a shell (2) is provided inside the plug-in slot, a line inlet for accessing a device line is provided at the top end of the shell (2), and a line outlet for connecting a ground line for guiding a high-voltage lightning current is provided at the bottom end of the mounting seat (1), the line inlet is connected to the mounting slot via a fixing component, so that the fixing of the line can be quickly released by unfastening the fixing component; A support frame (3) is fixedly connected to the inside of the housing (2), two varistors (16) for guiding current when struck by lightning are installed on the front side of the middle end of the support frame (3), a choke coil (11) is arranged on the top side of the varistor (16), an outer wall of the choke coil (11) is provided with an insulating protective sleeve, an input end of the choke coil (11) is connected to the line inlet to guide high-voltage lightning current through the choke coil (11) to effectively suppress common-mode interference signals, and an output end of the choke coil (11) is provided There is an electric connection seat (12), and a rotating seat (13) is arranged on the side close to the choke coil (11) and the two electric connection seats (12). One end of a switching member (14) sleeved on the outer wall is slidably connected to the outer wall of the electric connection seat (12), and the other end of the switching member (14) is abutted against the input end of one of the varistor (16) so that one of the electric connection seats (12) and the choke coil (11) form a series current. A fuse support member for switching the connection line is arranged on the right side of the switching member (14); An electrical terminal (23), the electrical terminal (23) being mounted on the bottom side of the housing (2), the input end of the electrical terminal (23) being connected to the two varistors (16) via a circuit protection component, the output end of the electrical terminal (23) being electrically fused to an electrical terminal (32), the four electrical terminal (32) being located inside the bottom end of the mounting base (1) and connected via a conductive sheet (33), the conductive sheet (33) being connected to the outlet; Two mirror-image limit members (28) are provided, the limit members (28) are located at the rear side of the support frame (3), the bottom side of the support frame (3) is rotatably connected with a rotating seat (27), the separated ends of the two limit members (28) both penetrate the outer wall of the shell (2) and are clamped in the limit grooves provided on the inner wall of the installation groove, the separated sides of the two rotating seats (27) are connected to the inner wall of the shell (2) through spring three, and the adjacent sides of the two rotating seats (27) are provided with a fuse fixing seat to cooperate with spring three to make the limit member (28) disengage from the limit groove after melting.

2. The lightning arrester for a circuit that is convenient for maintenance according to claim 1, wherein, The incoming line port includes a first wiring port (4) arranged on the top side of the inner wall of the housing (2). A sliding sleeve (5) is slidably connected to the outer wall of the first wiring port (4). The sliding sleeve (5) and the adjacent side of the first wiring port (4) are connected by a first spring (8). A first electrical contact piece (6) is arranged inside the first wiring port (4). A second spring (9) is arranged between the first electrical contact piece (6) and the adjacent side of the first wiring port (4). The bottom end of the first electrical contact piece (6) is slidably connected to the input end of the choke coil (11). The front side of the sliding sleeve (5) penetrates through the outer wall of the housing (2), and a first compression bolt (7) is threadedly connected to the middle part. The rear side of the first compression bolt (7) sequentially penetrates through the rear side of the sliding sleeve (5) and the front side of the inner wall of the first wiring port (4), and abuts against the front side of the first electrical contact piece (6).

3. A circuit lightning arrester convenient for maintenance according to claim 1, characterized in that, The outgoing line port includes a second wiring port (34) arranged on the bottom side of the mounting base (1). A second electrical contact piece (35) is arranged inside the second wiring port (34). The top end of the second electrical contact piece (35) is slidably connected to the bottom end of the fifth conductive piece (33). A second compression bolt (36) is threadedly connected to the front side of the second wiring port (34). The second compression bolt (36) abuts against the front side of the second electrical contact piece (35).

4. The lightning arrester for a circuit that is convenient for maintenance according to claim 2, wherein, The fixing component includes two clamping members (30) respectively slidably connected to both ends of the top of the inner wall of the mounting groove. Clamping grooves are formed on both the left and right sides of the sliding sleeve (5). The adjacent sides of the two clamping members (30) penetrate through the outer wall of the housing (2) and are arranged inside the clamping grooves. Elastic pieces two (31) are arranged on the separated sides of the two clamping members (30).

5. A circuit lightning arrester convenient for maintenance according to claim 1, characterized in that, The fuse support member includes a torsion spring (15) arranged on the right side of the rotating seat (13). The bottom end of the torsion spring (15) is connected to the lower right side of the switching member (14). A first fuse triggering member (17) is fixedly connected between the switching member (14) and the adjacent side of the support frame (3).

6. The lightning arrester for a circuit which is convenient for maintenance according to claim 1, characterized in that, The circuit protection component includes a suppression diode (18) and a gas discharge tube (19) installed on the bottom side of the inner wall of the mounting base (1). The suppression diode (18) and the gas discharge tube (19) are connected by a first conductive piece (20). The output end of the gas discharge tube (19) and the first electrical connection point (23) are connected by a third conductive piece (22). The input end of the suppression diode (18) is connected to the output ends of the two first varistors (16) by a second conductive piece (21).

7. The lightning arrester for a circuit which is convenient for maintenance according to claim 1, characterized in that The fuse fixing seat includes a second fuse triggering member (26) fixedly connected to the rear side of the support frame (3). The left and right ends of the second fuse triggering member (26) are fixedly connected to the rotating seat (27). A second varistor (25) is installed in the middle of the bottom side of the second fuse triggering member (26). The input end of the second varistor (25) and the output end of the other first varistor (16) are connected by a fourth conductive piece (24).

8. A circuit lightning arrester convenient for maintenance according to claim 1, characterized in that, A first elastic piece (29) is arranged on the top side of the limiting piece (28), the bottom side of the first elastic piece (29) abuts against the top side of the limiting piece (28), and the top end of the first elastic piece (29) is fixedly connected to the rear side of the support frame (3).

9. The lightning arrester for a circuit which is convenient for maintenance according to claim 1, characterized in that, A cable fixing member (10) is fixedly connected to the outer periphery of the top side of the outer wall of the housing (2), and a limiting protrusion is arranged at the opening of the cable fixing member (10).

10. The lightning arrester for a circuit which is convenient for maintenance according to claim 1, wherein, A pulling handle facilitating force application is fixedly connected to the front side of the outer wall of the housing (2).

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