An explosion-proof prefabricated plug-in metal oxide arrester

Abstract

The present application relates to an explosion-proof prefabricated plug-in metal oxide arrester, which relates to the field of power equipment protection, and includes a protection component, an assembly component, a drive component and a fastening component. The protection component includes a protection tube and a protection tube, both ends of the protection tube are open, one end of the protection tube is connected to a closing plate for closing the opening, the protection tube is slidably arranged in the protection tube, the assembly component includes a conductor, a conductive cavity is opened in the protection tube, and the conductor is located in the conductive cavity; the drive component includes an insulating sleeve, a spring and a drive member, the closing plate is coaxially fixed with a sleeve near one side of the protective tube, the insulating sleeve is slidably arranged in the sleeve, the insulating sleeve is connected to the protection tube, the spring is sleeved on the outer wall of the sleeve, the drive member is connected to the insulating sleeve to drive the insulating sleeve to move, and the fastening component includes a conductive seat, the conductor is connected to the conductive seat, and the conductive seat is connected to the metal contact surface in the installation port. The present application has the effect of improving the time-consuming and labor-intensive operation of personnel.

Description

Technical Field

[0001] The present application relates to the field of power equipment protection, and in particular to an explosion-proof prefabricated plug-in metal oxide arrester. Background Art

[0002] The lightning arrester is connected between the cable and the ground, usually in parallel with the protected equipment. The lightning arrester can effectively protect related equipment. Once abnormal voltage occurs, the lightning arrester will take action to play a protective role. The metal oxide lightning arrester is an important protective device in the power system, used to protect electrical equipment from damage caused by lightning overvoltage and operating overvoltage.

[0003] In the related art, when the existing metal oxide arrester needs to be installed, first, the area where the metal oxide arrester is to be installed is selected, the installation plate is laid on the installation area, and an installation opening is dug out on the installation plate. Subsequently, the metal oxide arrester is moved to the installation opening, and the pointed end of the metal oxide arrester is inserted into the corresponding installation opening. After that, the long bolt is taken out, and the long bolt is passed through the flange on the metal oxide arrester and the flange at the installation opening in turn, and then the long bolt is screwed, and the flange of the metal oxide arrester moves toward the flange at the installation opening until the pointed end of the metal oxide arrester fits into the installation hole, and then the flange on the metal oxide arrester and the flange at the installation opening are fixed by welding or bolting, and the installation of the metal oxide arrester is completed.

[0004] With respect to the above-mentioned related technologies, the pointed end of the metal oxide arrester is inserted into the installation port, and the flange on the metal oxide arrester is contacted with the flange at the installation port by a long bolt, so that the long bolt can fix the metal oxide arrester. However, inserting the pointed end of the metal oxide arrester into the installation port and then screwing the long bolt to fix the flange on the metal oxide arrester with the flange at the installation port causes the installation operation time to be too long, resulting in time-consuming and laborious operation for personnel. Summary of the invention

[0005] In order to improve the problem of time-consuming and labor-intensive operation of personnel, the present application provides an explosion-proof prefabricated plug-in metal oxide arrester.

[0006] The present application provides an explosion-proof prefabricated plug-in metal oxide arrester adopts the following technical solution:

[0007] An explosion-proof prefabricated plug-in metal oxide arrester, comprising a protection component, an assembly component, a drive component and a fastening component, the protection component comprising a protection tube and a protection tube, the protection tube is hollow, both ends of the protection tube are open, one end of the protection tube is connected to a closing plate for closing the opening, the end of the protection tube away from the closing plate is connected to a flange at the installation port, the protection tube is slidably arranged in the protection tube, the protection tube is coaxially arranged with the protection tube, and the protection tube can slide along the axial direction of the protection tube, the assembly component comprises a conductor, a conductive cavity is opened in the protection tube, and the conductor is located in the conductive cavity;

[0008] The driving assembly includes an insulating sleeve, a spring and a driving member. A sleeve is coaxially fixed to the closing plate near one side of the protective tube. The insulating sleeve is slidably arranged in the sleeve. The insulating sleeve slides toward or away from the closing plate along the axial direction of the sleeve. The insulating sleeve is connected to the protective tube. The spring is sleeved on the outer wall of the sleeve. One end of the spring is connected to the protective tube, and the other end is connected to the closing plate. The driving member is connected to the insulating sleeve to drive the insulating sleeve to move. The fastening assembly includes a conductive seat. The conductor is connected to the conductive seat, and the conductive seat is connected to the metal contact surface in the mounting port.

[0009] By adopting the above technical scheme, the protective tube, assembly components, drive components and fastening components are prefabricated in the factory in advance, and the lightning arrester is assembled and transported to the construction site. When the lightning arrester needs to be installed, the personnel first start the drive component, and the drive component drives the insulating sleeve to move. At this time, the insulating sleeve moves toward the closing plate. During the movement of the insulating sleeve, the insulating sleeve drives the protective tube to move synchronously. When the protective tube moves to a suitable position, the spring is compressed and has elastic potential energy. The protective tube is moved close to the designated installation port. The personnel start the drive component again, and the drive component drives the insulating sleeve to move toward the side away from the closing plate. The spring restores the deformation, and the protective tube can be pushed. The protective tube moves synchronously with the insulating sleeve. The protective tube moves toward one side of the installation port to connect the conductive seat with the metal contact surface in the installation port. Subsequently, the personnel take out the long bolts and fix the protective tube and the flange at the installation port by the long bolts. The lightning arrester is installed. Compared with the related art, the present application drives the insulating sleeve to move toward or away from the closing plate by a driving member, and moves the protective tube close to the designated installation port. By starting the driving member again, the driving member drives the protective tube to move, so that the conductive seat is connected with the metal contact surface of the installation port, and the protective tube contacts the flange of the installation port. Then, the protective tube and the flange of the installation port are fixed. There is no need for personnel to tighten the long bolts to make the protective tube contact the flange of the installation port, thereby saving labor for installation and helping to improve the problem of time-consuming and labor-intensive operation of personnel.

[0010] Optionally, the driving member includes a bolt and a fixing nut, a connecting tube is coaxially fixed to the side of the closing plate away from the protective tube, the connecting tube is opened on the side close to the closing plate, the connecting tube is connected to the sleeve, the bolt is connected to the insulating sleeve, and the fixing nut is threadedly connected to one end of the bolt close to the connecting tube.

[0011] By adopting the above technical scheme, when the protective tube needs to move, the personnel pulls the bolt, and the bolt can drive the protective tube to move toward the side of the closing plate. When the protective tube moves to the appropriate position, the protective tube is moved close to the installation port. Then, the bolt is loosened, and the spring restores the deformation, which can push the protective tube to move away from the closing plate until the conductive seat is connected to the metal contact surface of the installation port, and then the fixing nut is connected to the bolt, the bolt is fixed, and then the long bolt is taken out to fix the protective tube and the flange at the installation port. By setting the coordination of the bolt and the fixing bolt, the personnel only needs to pull the bolt to move the protective tube, move the protective tube close to the installation port, loosen the bolt, and use the spring to restore the deformation to push the protective tube until the conductive seat is connected to the metal contact surface of the installation port, and the protective tube contacts the flange of the installation port, which is convenient for personnel to install the lightning arrester, and further helps to improve the problem of time-consuming and labor-intensive operation of personnel.

[0012] Optionally, the driving member includes a pull rod and two latches, the pull rod is connected to the insulating sleeve, the pull rod is hollow, the pull rod and the protective tube are coaxially arranged, the two latches are symmetrically distributed along the axis of the pull rod, the setting direction of the latch is perpendicular to the axial direction of the pull rod, the latch passes through the pull rod and the insulating sleeve in turn, the latch is slidably connected to the pull rod and the insulating sleeve in turn, and the sleeve is provided with a slot for the latch to be inserted.

[0013] By adopting the above technical solution, when the protective tube needs to move, first, the personnel drives the pin to move, and the pin can move toward the inside of the pull rod to separate the pin from the slot. Then, the pull rod is pulled, and the pull rod drives the insulating sleeve to move toward the side close to the closing plate, the spring is compressed, and the spring has elastic potential energy. When the protective tube moves to a suitable position, the protective tube is moved close to the installation port, the pull rod is released, and the spring recovers its deformation to push the protective tube to move until the metal contact surface of the conductive seat and the installation port is connected. At the same time, the pin is driven to move toward the outside of the pull rod until the pin is inserted into the slot, the pull rod is fixed, and then the protective tube and the flange of the installation port are fixed. By setting the cooperation of the pull rod and the two pins, on the one hand, the insertion of the pin into the slot is conducive to reducing the loosening of the protective tube due to deformation of the spring after the metal contact surface of the conductive seat and the installation port is connected, which is convenient for fixing the pull rod; on the other hand, the personnel only need to pull the pull rod to drive the movement of the protective tube, which is convenient for personnel to operate.

[0014] Optionally, the driving member also includes a rotating rod and a conical push block, the rotating rod passes through the top of the pull rod, the rotating rod is threadedly connected to the pull rod, the conical push block is located inside the pull rod, the rotating rod is connected to the conical push block, the axis of the rotating rod coincides with the axis of the conical push block, the conical push block can move toward or away from the closing plate, the conical push block can push the pin to move, and the diameter of the conical push block gradually decreases from the closing plate to the protective tube side.

[0015] By adopting the above technical solution, when it is necessary to insert the pin into the slot, the person drives the rotating rod to move toward the side close to the closing plate, the rotating rod drives the conical pushing block to move, the conical pushing block pushes the pin to move, the pin moves toward the outside of the pull rod, the pin passes through the pull rod and the insulating sleeve in turn and is inserted into the slot, and then the rotating rod is stopped. By arranging the cooperation of the rotating rod, the conical pushing block and the pin, there is no need for the person to put his fingers into the pull rod to push the pin, which is convenient for the person to work and helps to save time and effort.

[0016] Optionally, the driving member further includes two abutment springs, the abutment springs corresponding to the latch one-to-one, the abutment springs being sleeved on one end of the latch located inside the pull rod, one end of the abutment spring being fixed to the latch, and the other end being fixed to the pull rod.

[0017] By adopting the above technical solution, when a person drives the rotating rod to move toward the side close to the closing plate, the conical pushing block can push the pin into the slot, and at this time, the abutment spring is compressed; when a person drives the rotating rod to move toward the side away from the closing plate, in the process of the abutment spring restoring its deformation, the end of the pin away from the inside of the pull rod can be separated from the slot, and the pin moves toward the inside of the pull rod. By setting the abutment spring, it is convenient to separate the pin from the slot.

[0018] Optionally, the closing plate is provided with a plurality of waist-shaped holes, and the plurality of waist-shaped holes are evenly distributed along the circumference of the closing plate.

[0019] By adopting the above technical solution and providing waist-shaped holes, when the arrester is working, as the temperature inside the arrester becomes higher and higher, the energy inside the arrester can be released through the waist-shaped holes, which is helpful to reduce the possibility of explosion inside the arrester.

[0020] Optionally, the conductor includes multiple resistors, contact pins, electrodes, a fixing seat and two insulating pull rings, the multiple resistors are distributed along the axis of the protective tube, the multiple resistors are spliced ​​into a resistor rod, the contact pin contacts one end of the resistor rod, the electrode contacts the other end of the resistor rod, the fixing seat is connected to the side of the electrode away from the resistor rod, the two insulating pull rings are each located on one side of the resistor rod, one end of the insulating pull ring is connected to the contact pin, and the other end is connected to the fixing seat, and the two insulating pull rings fix the multiple resistors.

[0021] By adopting the above technical solution, multiple resistors are spliced ​​into a resistor rod. By providing an insulating pull ring, the insulating pull ring further fixes the contact pin, resistor, electrode and fixing seat, so that the resistor is in close contact, which is convenient for fixing the resistor. If an explosion occurs, it is helpful to reduce the splashing of the resistor.

[0022] Optionally, the fastening assembly further includes a fastening spring, a side wall of the conductive seat is provided with an annular groove, the fastening spring is located in the annular groove, and the fastening spring is fixed to the conductive seat.

[0023] By adopting the above technical solution, the conductive seat and the metal contact surface are in hard contact, which increases the contact resistance. By setting the fastening spring, on the one hand, the fastening spring can strengthen the contact between the conductive seat and the metal contact surface, and the fastening spring can increase the stability of the connection of the conductive seat; on the other hand, the use of the fastening spring improves the reliability of the lightning arrester, ensuring that under various working conditions, the contact resistance between the contact pin and the metal contact surface remains at a low level, thereby ensuring the performance and protection effect of the lightning arrester. The fastening spring can provide continuous contact pressure to ensure that the contact pin is in close contact with the metal contact surface, and even in the case of equipment vibration or temperature changes, it can maintain a stable contact state and reduce the contact resistance.

[0024] Optionally, glass fiber is wound helically and reciprocatingly on the surface of the resistor rod.

[0025] By adopting the above technical solution and winding glass fiber on the surface of the resistor rod, it is further helpful to reduce the resistor splashing.

[0026] Optionally, glass fiber impregnated with epoxy resin is wound on the surface of the conductor, and a plurality of circular holes for heat release are opened on the glass fiber.

[0027] By adopting the above technical solution, glass fiber is wound on the surface of the conductor for multiple windings, which is further beneficial to reduce the splashing of the resistor; the energy generated by the heat of the resistor can be released through the circular hole, further ensuring the explosion-proof performance of the lightning arrester.

[0028] In summary, the present application includes at least one of the following beneficial technical effects:

[0029] Compared with the related art, the present application drives the insulating sleeve to move toward or away from the closing plate through the driving member, moves the protective tube close to the designated installation port, and starts the driving member again to drive the protective tube to move, so that the conductive seat is connected to the metal contact surface of the installation port, the protective tube contacts the flange of the installation port, and then fixes the protective tube to the flange of the installation port, without the need for personnel to screw long bolts to contact the flange of the installation port, thereby saving labor for installation and helping to improve the problem of time-consuming and labor-intensive operation of personnel;

[0030] By setting the combination of bolts and fixing bolts, personnel only need to pull the bolts to move the protective tube, move the protective tube close to the installation port, loosen the bolts, and use the spring to restore the deformation, so that the protective tube can be pushed until the conductive seat is connected with the metal contact surface of the installation port, and the protective tube is in contact with the flange of the installation port, which is convenient for personnel to install the lightning arrester, and further helps to improve the problem of time-consuming and labor-intensive operation of personnel;

[0031] By winding glass fiber on the surface of the conductor for multiple windings, it is further helpful to reduce the splashing of the resistor; the energy generated by the heat of the resistor can be released through the circular hole, further ensuring the explosion-proof performance of the lightning arrester. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure in Example 1;

[0033] Figure 2 is a cross-sectional view of the first viewing angle in Example 1;

[0034] Figure 3 yes Figure 2 A magnified view of middle;

[0035] Figure 4 is a schematic structural diagram of the conductor in Example 1;

[0036] Figure 5 is a cross-sectional view of the second viewing angle in Example 1;

[0037] Figure 6 is a cross-sectional view in Example 2;

[0038] Figure 7 yes Figure 6 Enlarged view of middle B;

[0039] Figure 8 It is a schematic diagram of the structure of the driving member in Example 2.

[0040] Description of reference numerals: 1. protection component; 11. protection cylinder; 111. closing plate; 1111. waist-shaped hole; 1112. connecting cylinder; 112. metal flange; 113. positioning hole; 114. sleeve; 1141. slot; 12. protection cylinder; 121. flexible ring; 122. conductive cavity; 13. insertion cylinder; 131. placement groove; 2. assembly component; 21. conductor; 211. resistor; 212. contact pin; 2121. contact plate; 2122, contact needle; 213, electrode; 214, fixed seat; 215, insulating pull ring; 3, driving assembly; 31, pressure plate; 32, insulating sleeve; 33, driving member; 331, bolt; 332, fixing nut; 333, spring; 334, pull rod; 335, rotating rod; 336, conical push block; 337, latch; 338, abutting spring; 4, fastening assembly; 41, conductive seat; 411, ring groove; 42, fastening spring. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-8 This application is described in further detail.

[0042] The embodiment of the present application discloses an explosion-proof prefabricated plug-in metal oxide arrester.

[0043] Example 1

[0044] Reference Figure 1 and Figure 2 An explosion-proof prefabricated plug-in metal oxide arrester includes a protection component 1 and an assembly component 2, wherein the assembly component 2 is arranged on the protection component 1.

[0045] Reference Figure 1 and Figure 2 The protection component 1 includes a protection tube 11, a protection tube 12 and an insertion tube 13. The protection tube 11 is hollow, and both ends of the protection tube 11 are open. A closing plate 111 is integrated at one end of the protection tube 11. The closing plate 111 closes one end of the protection tube 11. A plurality of waist-shaped holes 1111 are opened on the closing plate 111. The plurality of waist-shaped holes 1111 are evenly distributed along the circumference of the closing plate 111. As the temperature inside the arrester increases, the energy inside the arrester can be released through the waist-shaped holes 1111, which is beneficial to reduce the explosion inside the arrester. A metal flange 112 is provided at one end of the protection tube 11 away from the closing plate 111, and the metal flange 112 is fixedly connected to the protection tube 11.

[0046] Reference Figure 1 , Figure 2 and Figure 3The protective tube 12 is located in the protective tube 11, the protective tube 12 is coaxially arranged with the protective tube 11, and the protective tube 12 is slidably connected to the protective tube 11, the protective tube 12 slides along the axial direction of the protective tube 11, and the end of the protective tube 12 away from the closing plate 111 is conical, and the side wall of the protective tube 12 fits the side wall of the protective tube 11. In this embodiment, the material of the protective tube 12 is silicone rubber, which has good dielectric properties and high breakdown strength, can effectively prevent the generation of arcs, and improve the electrical stability of the lightning arrester. Silicone rubber has high mechanical strength and elasticity, can withstand the mechanical stress of the lightning arrester during installation and operation, and reduce the performance degradation caused by mechanical damage. A flexible ring 121 is provided on the outer wall of the protective tube 12, and the protective tube 12 is fixedly bonded to the flexible ring 121 A plurality of positioning holes 113 are provided on the side wall of the protective tube 11 at one end away from the closing plate 111. The plurality of positioning holes 113 are evenly distributed along the circumference of the protective tube 11. When the protective tube 12 is installed in the protective tube 11, the flexible ring 121 is close to the positioning holes 113. Personnel observe the flexible ring 121 through the positioning holes 113, which is convenient for assembling the lightning arrester. The insertion tube 13 is located at the end of the protective tube 12 away from the closing plate 111. In the present embodiment, the insertion tube 13 is truncated cone-shaped, and the larger end of the insertion tube 13 is integrally connected with the protective tube 12. The insertion tube 13 can be inserted into the designated installation port. Personnel insert the long bolts into the metal flange 112 on the protective tube 11 and the flange at the installation port, and tighten the long bolts until the metal flange 112 on the protective tube 11 and the flange at the installation port are fixed.

[0047] Reference Figure 2 and Figure 4The assembly component 2 includes a conductor 21. A conductive cavity 122 is provided in the protective tube 12 for placing the conductor 21. The conductor 21 includes a plurality of resistors 211, a contact pin 212, an electrode 213, a fixing seat 214 and two insulating pull rings 215. In this embodiment, the resistor 211 adopts a zinc oxide resistor sheet. The plurality of resistors 211 are distributed along the axis of the protective tube 11, and the plurality of resistors 211 are spliced ​​into a resistor rod. Two adjacent resistors 211 are in contact with each other. Glass fiber is wound spirally and reciprocatingly on the surface of the resistor rod. The contact pin 212 is located at one end of the resistor rod. The shape of the contact pin 212 is determined according to personnel needs. The contact pin 212 includes a contact plate 2121 and a contact plate 2122. The contact pin 2122 and the contact plate 2121 are in contact with the resistor 211. The contact pin 2122 is located at the end of the contact plate 2121 away from the resistor 211, and one end of the contact pin 2122 is integrally connected with the contact plate 2121. The length direction of the contact pin 2122 is consistent with the axial direction of the protective tube 11. The electrode 213 is located at the end of the resistor rod away from the contact plate 2121, and the electrode 213 is in contact with the resistor 211. The fixing seat 214 is located on the side of the electrode 213 away from the resistor 211. The clamping screw passes through the fixing seat 214 and the electrode 213 in sequence. The clamping screw is threadedly connected to the fixing seat 214 and the electrode 213, and the clamping screw fixes the fixing seat 214 and the electrode 213.

[0048] Reference Figure 2 and Figure 4 , two insulating pull rings 215 are respectively located on one side of the resistor rod, and can also be replaced by an insulating pull rod 334. The insulating pull ring 215 is made of glass fiber impregnated with epoxy resin. A fixing groove for the insulating pull ring 215 to be hung is provided on the contact plate 2121, and an arc groove for the insulating pull ring 215 to be hung is provided on the fixing seat 214. The insulating pull ring 215 further fixes the contact pin 212, the resistor 211, the electrode 213 and the fixing seat 214, so that the resistor 211 is in close contact, which is convenient for fixing the resistor 211. If an explosion occurs, it is helpful to reduce the splashing of the resistor 211; the glass fiber or the weftless glass fiber cloth impregnated with epoxy resin is set by a specific program of the winding machine, and is intermittently wound on the conductor 21 according to a certain rule, so that the glass fiber or the weftless glass fiber cloth is regularly distributed with blank winding circular holes of 5 to 8 mm in size. The energy generated by the heat of the resistor 211 can be released through the circular holes, further ensuring the explosion-proof performance of the lightning arrester.

[0049] Reference Figure 5 An explosion-proof prefabricated plug-in metal oxide arrester also includes a driving component 3 and a fastening component 4. The driving component 3 and the fastening component 4 are both arranged on the protection component 1, and the driving component 3 is connected to the assembly component 2.

[0050] Reference Figure 5The driving assembly 3 includes a pressing plate 31, an insulating sleeve 32 and a driving member 33. The surface of the protective tube 12 is evenly coated with conductive glue to prevent dust, moisture and other external factors from affecting the resistor 211. The pressing plate 31 is located on the side of the protective tube 12 close to the closing plate 111. The setting direction of the pressing plate 31 is perpendicular to the axial direction of the protective tube 11. In this embodiment, the pressing plate 31 is made of aluminum plate. The pressing plate 31 and the protective tube 12 are fixed by conductive glue. The conductive glue is connected to the pressing plate 31 to form an equipotential body. A sleeve 114 is provided on the protective tube 11 at the side of the closing plate 111 close to the inner side of the protective tube 11. The sleeve 114 is coaxially arranged with the protective tube 11. The sleeve 114 is welded to the protective tube 11. The insulating sleeve 32 is located in the sleeve 114, and the insulating sleeve 32 is slidably connected to the sleeve 114. The insulating sleeve 32 can slide along the axial direction of the sleeve 114. The end of the insulating sleeve 32 close to the pressing plate 31 is fixedly connected to the pressing plate 31 by screws, and the pressing plate 31 moves synchronously with the insulating sleeve 32.

[0051] Reference Figure 5 The driving member 33 includes a bolt 331, a fixing nut 332 and a spring 333. A connecting tube 1112 is provided on the side of the closing plate 111 away from the inner side of the protective tube 11. The connecting tube 1112 is coaxially arranged with the protective tube 11. The connecting tube 1112 is hollow, and the side of the connecting tube 1112 close to the closing plate 111 is open. The connecting tube 1112 is fixedly connected to the closing plate 111 by screws. The connecting tube 1112 is connected to the sleeve 114. The bolt 331 passes through the connecting tube 1112, the insulating sleeve 32 and the protective tube 12 in sequence and is connected to the fixing seat 214 by threaded connection. The bolt 331 is fixed to the insulating sleeve 32 by a threaded connection. When a person pulls the bolt 331, the bolt 331 can drive the protective tube 12 to slide. The fixing nut 332 is threadedly connected to the bolt 331 near one end of the connecting tube 1112. When the protective tube 12 moves to a suitable position and the insertion tube 13 is inserted into the designated installation port, the bolt 331 is fixed by the fixing nut 332. The spring 333 is sleeved on the outer wall of the sleeve 114. One end of the spring 333 is welded to the pressure plate 31, and the other end is welded to the closing plate 111. In this embodiment, the spring 333 is a compression spring.

[0052] Reference Figure 5The fastening assembly 4 includes a conductive seat 41 and a fastening spring 42. The conductive seat 41 is located on the side of the insertion tube 13 away from the protective tube 12. The insertion tube 13 is provided with a placement groove 131 for the conductive seat 41 to be placed. The side wall of the conductive seat 41 is in contact with the side wall of the placement groove 131. In this embodiment, the conductive seat 41 is cylindrical. The conductive seat 41 and the contact pin 2122 are fixedly connected by screws. The side wall of the conductive seat 41 is provided with an annular groove 411. The fastening spring 42 is located in the annular groove 411. The fastening spring 42 is welded to the conductive seat 41. When the insertion tube 13 is inserted into the designated installation port, the conductive seat 41 is in contact with the metal surface. Contact, the tightening spring 42 can strengthen the contact between the conductive seat 41 and the metal contact surface, the tightening spring 42 can increase the stability of the connection of the conductive seat 41, the use of the tightening spring 42 improves the reliability of the lightning arrester, and ensures that under various working conditions, the contact resistance 211 between the contact pin 212 and the metal contact surface is maintained at a low level, thereby ensuring the performance and protection effect of the lightning arrester, the tightening spring 42 can provide continuous contact pressure, ensure that the contact pin 212 is in close contact with the metal contact surface, and maintain a stable contact state even in the case of equipment vibration or temperature changes, thereby reducing the contact resistance 211.

[0053] The implementation principle of Example 1 is: the protective tube 11, assembly component 2, drive component 3 and fastening component 4 are prefabricated in the factory in advance, and the lightning arrester is assembled and transported to the construction site. When the lightning arrester needs to be installed, the personnel first start the drive component 3, and the drive component 3 drives the protective tube 12 to slide in the protective tube 11, and the protective tube 12 moves toward the side close to the closing plate 111, and the insertion tube 13 moves synchronously with the protective tube 12. When it moves to the appropriate position, the insertion tube 13 is inserted into the designated installation port. Through the personnel's hand support, the personnel start the drive component 3 again, and the drive component 3 drives the protective tube 12 to move toward the side away from the closing plate 111, and the insertion tube 13 is inserted into the installation port. Subsequently, the personnel take out the long bolts, and pass the long bolts through the metal flange 112 on the protective tube 11 and the flange at the installation port in turn, and fix the metal flange 112 on the protective tube 11 and the flange at the installation port.

[0054] When it is necessary to drive the protective tube 12 to move, the personnel pulls the bolt 331, and the bolt 331 can drive the protective tube 12 to move toward the side of the closing plate 111. When the protective tube 12 moves to the appropriate position, the spring 333 is compressed and has elastic potential energy. Then, the bolt 331 is loosened, and the spring 333 restores its deformation, which can push the protective tube 12 to move away from the closing plate 111. Then, the fixing nut 332 is connected to the bolt 331, the bolt 331 is fixed, and then the long bolt is taken out to fix the metal flange 112 on the protective tube 11 and the flange at the installation port.

[0055] Example 2

[0056] Reference Figure 6, Figure 7 and Figure 8 The difference between this embodiment and embodiment 1 is that the driving member 33 also includes a pull rod 334, a rotating rod 335, a conical push block 336, two pins 337 and two abutment springs 338. The pull rod 334 passes through the connecting tube 1112, the insulating sleeve 32 and the protective tube 12 in sequence and is fixedly connected to the fixing seat 214 by screws, and the pull rod 334 is fixed to the insulating sleeve 32 by screws. When a person drives the pull rod 334, the pull rod 334 can drive the protective tube 12 to slide. The pull rod 334 is hollow.

[0057] Reference Figure 6 , Figure 7 and Figure 8 The rotating rod 335 passes through the top of the pull rod 334, and the rotating rod 335 is threadedly connected to the pull rod 334. The conical push block 336 is located in the pull rod 334, and the rotating rod 335 is welded to the conical push block 336. In this embodiment, the conical push block 336 is a truncated cone, and the diameter of the conical push block 336 gradually decreases from the closing plate 111 to the side of the pressure plate 31. The latch 337 is located in the pull rod 334, and the setting direction of the latch 337 is perpendicular to the axial direction of the pull rod 334. The latch 337 passes through the pull rod 334 and the insulating sleeve 32 in sequence. The latch 337 is slidably connected to the pull rod 334 and the insulating sleeve 32 in sequence. A slot 1141 is provided on the sleeve 114 for the latch 337 to be inserted into. The abutment spring 338 corresponds to the latch 337 one by one. The abutment spring 338 is sleeved on one end of the latch 337 located in the pull rod 334. One end of the abutment spring 338 is welded to the latch 337, and the other end is welded to the pull rod 334. When the pull rod 334 needs to be pulled, the latch 337 is separated from the slot 1141; when the insertion tube 13 is inserted into the installation port, the latch 337 is inserted into the slot 1141.

[0058] The implementation principle of Example 2 is as follows: when it is necessary to drive the protective tube 12 to move, the personnel screws the rotating rod 335, and the rotating rod 335 drives the conical push block 336 to move, which can separate the pin 337 from the slot 1141, and then pulls the pull rod 334, and the pull rod 334 can drive the protective tube 12 to move toward the side of the closing plate 111. When the protective tube 12 moves to a suitable position, the spring 333 is compressed and has elastic potential energy, and the insertion tube 13 is inserted into the installation port. Subsequently, the pull rod 334 is released, and the spring 333 recovers its deformation, which can push the protective tube 12 to move away from the closing plate 111. The rotating rod 335 is screwed in the opposite direction, and the rotating rod 335 pushes the conical push block 336 to move, and the conical push block 336 pushes the pin 337, and the pin 337 can be inserted into the slot 1141, fix the pull rod 334, and then take out the long bolt to fix the metal flange 112 on the protective tube 11 and the flange at the installation port.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An explosion-proof prefabricated plug-in metal oxide arrester, characterized in that: The invention comprises a protection component (1), an assembly component (2), a driving component (3) and a fastening component (4), wherein the protection component (1) comprises a protection tube (11) and a protection tube (12), wherein the protection tube (11) is hollow, and both ends of the protection tube (11) are open, and one end of the protection tube (11) is connected to a closing plate (111) for closing the opening, and the end of the protection tube (11) away from the closing plate (111) is connected to a flange at a mounting opening, and the protection tube (12) is slidably arranged in the protection tube (11), and the protection tube (12) is coaxially arranged with the protection tube (11), and the protection tube (12) can slide along the axial direction of the protection tube (11), and the assembly component (2) comprises a conductor (21), and a conductive cavity (122) is opened in the protection tube (12), and the conductor (21) is located in the conductive cavity (122); The driving assembly (3) comprises an insulating sleeve (32), a spring (333) and a driving member (33); a sleeve (114) is coaxially fixed to one side of the closing plate (111) close to the inner side of the protective tube (11); the insulating sleeve (32) is slidably arranged in the sleeve (114); the insulating sleeve (32) slides along the axial direction of the sleeve (114) toward or away from the closing plate (111); the insulating sleeve (32) is connected to the protective tube (12); The spring (333) is sleeved on the outer wall of the sleeve (114), one end of the spring (333) is connected to the protective tube (12), and the other end is connected to the closing plate (111), the driving member (33) is connected to the insulating sleeve (32) to drive the insulating sleeve (32) to move, the fastening assembly (4) includes a conductive seat (41), the conductor (21) is connected to the conductive seat (41), and the conductive seat (41) is connected to the metal contact surface in the installation opening; The driving member (33) comprises a bolt (331) and a fixing nut (332); a connecting tube (1112) is coaxially fixed to the side of the closing plate (111) away from the inner side of the protective tube (11); the connecting tube (1112) is opened on the side close to the closing plate (111); the connecting tube (1112) is connected to the sleeve (114); the bolt (331) is connected to the insulating sleeve (32); and the fixing nut (332) is threadedly connected to one end of the bolt (331) close to the connecting tube (1112); The conductor (21) comprises a plurality of resistors (211), a contact pin (212), an electrode (213), a fixing seat (214) and two insulating pull rings (215). The plurality of resistors (211) are distributed along the axis of the protective tube (11). The plurality of resistors (211) are spliced ​​into a resistor rod. The contact pin (212) contacts one end of the resistor rod, and the electrode (213) contacts the other end of the resistor rod. The fixing seat (214) is connected to the side of the electrode (213) away from the resistor rod. The two insulating pull rings (215) are respectively located on one side of the resistor rod. One end of the insulating pull ring (215) is connected to the contact pin (212), and the other end is connected to the fixing seat (214). The two insulating pull rings (215) fix the plurality of resistors (211).

2. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 1, characterized in that: The driving member (33) includes a pull rod (334) and two latches (337). The pull rod (334) is connected to the insulating sleeve (32). The pull rod (334) is hollow and coaxial with the protective tube (11). The two latches (337) are symmetrically distributed along the axis of the pull rod (334). The setting direction of the latches (337) is perpendicular to the axial direction of the pull rod (334). The latches (337) pass through the pull rod (334) and the insulating sleeve (32) in sequence. The latches (337) are slidably connected to the pull rod (334) and the insulating sleeve (32) in sequence. The sleeve (114) is provided with a slot (1141) for inserting the latches (337).

3. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 2, characterized in that: The driving member (33) also includes a rotating rod (335) and a conical push block (336), wherein the rotating rod (335) passes through the top of the pull rod (334), the rotating rod (335) is threadedly connected to the pull rod (334), the conical push block (336) is located inside the pull rod (334), the rotating rod (335) is connected to the conical push block (336), the axis of the rotating rod (335) coincides with the axis of the conical push block (336), the conical push block (336) can move toward or away from the side of the closing plate (111), the conical push block (336) can push the pin (337) to move, and the diameter of the conical push block (336) gradually decreases from the closing plate (111) to the side of the protective tube (12).

4. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 3, characterized in that: The driving member (33) further includes two abutment springs (338), the abutment springs (338) corresponding one to the latch pin (337), the abutment springs (338) being sleeved on one end of the latch pin (337) located inside the pull rod (334), one end of the abutment spring (338) being fixed to the latch pin (337), and the other end being fixed to the pull rod (334).

5. An explosion-proof prefabricated pluggable metal oxide arrester according to any one of claims 1 to 4, characterized in that: The closing plate (111) is provided with a plurality of waist-shaped holes (1111), and the plurality of waist-shaped holes (1111) are evenly distributed along the circumference of the closing plate (111).

6. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 1, characterized in that: The fastening assembly (4) further comprises a fastening spring (42); a side wall of the conductive seat (41) is provided with an annular groove (411); the fastening spring (42) is located in the annular groove (411); and the fastening spring (42) is fixed to the conductive seat (41).

7. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 1, characterized in that: The surface of the resistor rod is wound with glass fiber in a spiral manner.

8. The explosion-proof prefabricated plug-in metal oxide arrester according to claim 7, characterized in that: Glass fibers impregnated with epoxy resin are wound on the surface of the conductor (21), and a plurality of circular holes for heat release are provided on the glass fibers.

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