A housing for a surge protection device and a related surge protection device

Abstract

The present invention discloses a housing for a surge protection device and a related surge protection device. The housing includes a base and a cover plate disposed on one side of the base. The cover plate and the base are detachably connected by a limiting mechanism. The limiting mechanism includes a limiting post rotatably disposed on the cover plate. A fixing plate is fixedly connected to the inner wall of the base. A limiting hole matching with the limiting post is formed in the fixing plate. Top plates are hinged to both the top and bottom of the limiting post. A sealing chamber is formed on the side surface of the top plate away from the hinge axis. A positioning plate is slidably connected inside the sealing chamber. An extrusion assembly is disposed between the upper and lower top plates. When the top plate and the positioning plate cross over the fixing plate; this structure connects the base and the cover plate through the mutual cooperation between the limiting post and the fixing plate. Compared with the traditional bolt connection method, this structure is more convenient and fast in connection, enabling the cover plate to be installed or disassembled more quickly during installation and maintenance.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and particularly relates to a housing for a surge protection device and a related surge protection device. Background Art

[0002] A surge protector is also known as a lightning arrester, surge arrester, lightning protection device, overvoltage protector, and is applicable to 50, 60 Hz. A surge protector is a device that prevents equipment from being struck by lightning through modern electrical and other technologies.

[0003] Chinese invention patent CN103151226B discloses a housing for a surge protection device and a related surge protection device. A housing for a surge protection device includes: two electrical connection members; a surge protection component, which is electrically connected to the two electrical connection members and whose temperature increases when there is a voltage drop; a locking member, which contacts the electrical protection component; a mechanical switch, which is connected to the locking member and is serially installed between one of the two electrical connection members and the surge protection component, and the locking member keeps the switch in the closed position.

[0004] However, when installing the housing of the above-mentioned surge protector, it is generally installed by fixing methods such as bolts or screws. As a result, during the installation or disassembly and maintenance process, multiple bolts need to be turned to disassemble the housing, which makes the disassembly steps relatively cumbersome and is not conducive to the daily maintenance and installation work.

[0005] Therefore, it is necessary to provide a housing for a surge protection device and a related surge protection device to solve the above technical problems. Summary of the Invention

[0006] The purpose of the present invention is to provide a housing for a surge protection device and a related surge protection device to solve the problem that when installing the housing of the existing surge protector, it is generally installed by fixing methods such as bolts or screws, resulting in multiple bolts needing to be turned to disassemble the housing during the installation or disassembly and maintenance process, thus making the disassembly steps relatively cumbersome and not conducive to the daily maintenance and installation work as mentioned in the above background art.

[0007] Based on the above idea, the present invention provides the following technical solution: It includes a base and a cover plate arranged on one side of the base. The cover plate and the base are detachably connected through a limiting mechanism. The limiting mechanism includes a limiting column rotatably arranged on the cover plate. An fixing plate is fixedly connected to the inner wall of the base. A limiting hole matching the limiting column is opened on the fixing plate. The top and bottom of the limiting column are both hinged with a top plate. A sealing chamber is opened on the side surface of the top plate far away from the hinge axis. A positioning plate is slidably connected inside the sealing chamber;

[0008] An extrusion assembly is arranged between the upper and lower top plates. When the top plate and the positioning plate cross the fixing plate, the top plate is clamped on the inner side surface of the fixing plate, and the positioning plate is driven by the extrusion assembly to slide outward along the sealing chamber and press against the inner side surface of the fixing plate.

[0009] As a further solution of the present invention: a square groove is formed on the outer circumferential surface of the limit post, the top plate is hinged inside the square groove, a limit spring is arranged at the bottom of the top plate, the limit spring is fixedly connected to the inner bottom surface of the square groove, a limit plate is arranged on the outer side surface of the top plate, the limit plate is fixedly connected to the inner wall of the square groove, and when the top plate rotates upward and contacts the limit plate, the top plate rotates to the limit position.

[0010] As a further solution of the present invention: the extrusion assembly includes a limit piece arranged between the upper and lower top plates, the limit piece is arc-shaped, connecting heads are arranged at the top and bottom ends of the limit piece, the connecting heads are hinged to the limit piece, a sliding groove is formed on the bottom surface of the top plate, and one end of the connecting head away from the limit piece is slidably connected inside the sliding groove; when the upper and lower top plates rotate and approach each other, the limit piece is extruded to be bent.

[0011] As a further solution of the present invention: a sleeve and a sliding rod are arranged between the two limit pieces, the inside of the sleeve is an accommodation chamber, one end of the sliding rod extends into the accommodation chamber and is slidably connected to the sleeve through the accommodation chamber, and the ends of the sleeve and the sliding rod close to the limit piece are both hinged to the limit piece.

[0012] As a further solution of the present invention: two diversion pipes are symmetrically communicated with the outside of the sleeve, and the ends of the diversion pipes away from the sleeve extend upward to the inner wall of the top plate and are communicated with the bottom end of the sealing chamber.

[0013] As a further solution of the present invention: stop grooves are formed on the top and bottom of the inner side surface of the fixing plate at the position of the limit holes, the stop grooves are arc-shaped, when the top plate rotates downward to extrude the limit piece to be bent, the positioning plate moves downward to the stop grooves, so that the cover plate moves away from the base and an exhaust gap is formed between the cover plate and the base.

[0014] As a further solution of the present invention: a groove is formed on one side of the base close to the cover plate, the groove is in a zigzag shape, and a filter frame matched with the groove is fixedly connected to the inner side surface of the cover plate.

[0015] As a further solution of the present invention: a support frame is fixedly connected to the inner side surface of the cover plate, the filter frame is fixed to the outside of the support frame, a sliding plate is slidably connected inside the groove, a first magnetic strip is fixedly connected to the side of the sliding plate close to the support frame, and a second magnetic strip cooperating with the first magnetic strip is fixedly connected to the side surface of the support frame. The inner wall of the support frame is in contact with the inner bottom surface of the groove. A return spring is arranged inside the sliding plate, and the return spring is fixedly arranged between the inner end wall of the groove and the sliding plate. An exhaust groove penetrating through is formed in the sliding plate.

[0016] As a further solution of the present invention: a through groove is formed in the limiting column, the limiting piece passes through this through groove, and baffles are arranged on both sides of the through groove.

[0017] A related surge protection device includes a surge protection device body, and the surge protection device body is installed inside a housing.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows: the acting force of the limiting spring on the top plate can drive the top plate to rotate upward and be clamped inside the fixing plate, so as to connect the cover plate and the base to each other. And by arranging a limiting plate on the outside of the top plate, when the top plate is clamped inside the fixing plate, it cannot rotate upward anymore, so that the connection between the cover plate and the base is tighter. This structure connects the base and the cover plate to each other through the mutual cooperation between the limiting column and the fixing plate. Compared with the traditional bolt connection method, this structure is more convenient and fast to connect, enabling the cover plate to be installed or disassembled more quickly during the installation and maintenance processes. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the drawings and embodiments.

[0020] Figure 1 is the overall structure schematic diagram of the present invention;

[0021] Figure 2 is the structure schematic diagram of the limiting column and the fixing plate of the present invention;

[0022] Figure 3 is the present invention Figure 1 magnified structure schematic diagram at B of;

[0023] Figure 4 is the present invention Figure 1 magnified structure schematic diagram at A of;

[0024] Figure 5 is the present invention Figure 2 magnified structure schematic diagram at C of;

[0025] Figure 6 is the structure schematic diagram of the limiting piece of the present invention;

[0026] Figure 7 Schematic diagram of the top plate and chute structure of the present invention;

[0027] Figure 8 Schematic diagram of the baffle structure of the present invention;

[0028] Figure 9 Schematic diagram of the support frame and filter frame structure of the present invention;

[0029] Figure 10 Schematic diagram of the groove structure of the present invention;

[0030] Figure 11 Schematic diagram of the limiting hole and lead-out groove structure of the present invention.

[0031] In the figure: 1, base; 2, surge protection device body; 3, filter screen; 4, cover plate; 5, knob; 6, limiting post; 7, exhaust gap; 8, baffle; 9, stop groove; 10, positioning plate; 11, sealing strip; 12, sealing chamber; 13, top plate; 14, limiting plate; 15, limiting spring; 16, diversion pipe; 17, chute; 18, connector; 19, limiting piece; 20, support frame; 21, sliding plate; 22, groove; 23, reset spring; 24, exhaust groove; 25, filter frame; 26, sleeve; 27, sliding rod; 28, first magnetic strip; 29, second magnetic strip; 30, through groove; 31, fixing plate; 32, limiting hole; 33, lead-out groove; 34, limiting ring. Detailed implementation manner

[0032] As Figure 1-2 shown, a housing for a surge protection device includes a housing, the housing includes a base 1 and a cover plate 4 provided on one side of the base 1. A surge protection device body 2 is provided inside the base 1, and the cover plate 4 and the base 1 are detachably connected through a limiting mechanism. A heat dissipation groove is provided at the bottom of the base 1, and a filter screen 3 is provided at the heat dissipation groove.

[0033] Specifically, the limiting mechanism includes a limiting post 6 rotatably provided on the cover plate 4. Specifically, through holes are provided through the top and bottom of the outer side of the cover plate 4, and the limiting post 6 passes through the through holes and is rotatably connected to the cover plate 4. In order to prevent the limiting post 6 from detaching from the cover plate 4, an annular groove is provided on the cover plate 4 outside the through hole, and a limiting ring 34 is fixedly connected to the outer circumferential surface of the limiting post 6. The limiting ring 34 is rotatably provided inside the annular groove.

[0034] In addition, a fixing plate 31 is fixedly connected inside the base 1 at the opening. The fixing plate 31 is in a square frame shape with a hole in the middle, and a limiting hole 32 matching the limiting post 6 is provided on the fixing plate 31. When the cover plate 4 is clamped on one side of the base 1, the limiting post 6 passes through the limiting hole 32 to detachably connect the cover plate 4 and the base 1.

[0035] Further, a square groove is formed on the outer circumferential surface of the limit post 6, and a top plate 13 is rotatably connected inside the square groove. Specifically, hinge shafts are fixedly connected to the front and rear sides of the bottom end of the top plate 13, and hinge seats matched with the hinge shafts are fixedly connected to the inner bottom surface of the square groove, enabling the top plate 13 to be hinged to the hinge seats. Meanwhile, a limit spring 15 is arranged at the bottom of the top plate 13, and the limit spring 15 is fixedly connected to the inner bottom surface of the square groove to limit the top plate 13.

[0036] Furthermore, a limit plate 14 is arranged on the outer side surface of the top plate 13. The limit plate 14 is fixedly connected to the inner wall of the square groove and is arranged along a direction parallel to the bottom surface of the square groove. When the top plate 13 rotates upward and contacts the limit plate 14, the top plate 13 rotates to the limit position.

[0037] During actual use, when the cover plate 4 moves to the outside of the base 1, the limit post 6 will first penetrate into the limit hole 32 on the fixing plate 31. The extrusion of the inner wall of the limit hole 32 on the top plate 13 can cause the top plate 13 to rotate downward against the action force of the limit spring 15 and be received into the square groove. When the cover plate 4 is completely clamped outside the base 1, the top plate 13 passes through the limit hole 32 on the fixing plate 31. At this time, the action force of the limit spring 15 on the top plate 13 can drive the top plate 13 to rotate upward and be clamped inside the fixing plate 31, thereby connecting the cover plate 4 and the base 1 to each other. By arranging the limit plate 14 on the outer side of the top plate 13, when the top plate 13 is clamped inside the fixing plate 31, it cannot rotate upward anymore, making the connection between the cover plate 4 and the base 1 tighter. This structure connects the base 1 and the cover plate 4 to each other through the mutual cooperation between the limit post 6 and the fixing plate 31. Compared with the traditional bolt connection method, this structure is more convenient and fast in connection, enabling the cover plate 4 to be installed or disassembled more quickly during installation and maintenance.

[0038] As shown in Figure 2-8 Figures 11, in order to facilitate the limit spring 15 to push the top plate 13 upward so that it is placed inside the fixing plate 31, during the movement process, it is often necessary to move the top plate 13 inward to the inside of the fixing plate 31 and have a certain distance from the inner side surface of the fixing plate 31, so as to facilitate the limit spring 15 to bounce the top plate 13 upward to form a clamping structure with the fixing plate 31, thereby connecting the cover plate 4 and the base 1 to each other. At this time, due to the certain distance between the top plate 13 and the inner side surface of the fixing plate 31, the connection between the base 1 and the cover plate 4 is relatively loose.

[0039] To solve the above problems, a sealing chamber 12 is provided on the side surface of the top plate 13 away from the hinge axis. A positioning plate 10 is slidably connected inside the sealing chamber 12. One end of the positioning plate 10 extending into the sealing chamber 12 is fixedly connected with a sealing strip 11 to increase the sealing performance between the positioning plate 10 and the top plate 13. At the same time, an extrusion assembly is provided between the upper and lower top plates 13. When the top plate 13 and the positioning plate 10 at its top pass over the fixing plate 31, the top plate 13 is clamped on the inner side surface of the fixing plate 31. Meanwhile, the extrusion assembly drives the positioning plate 10 to slide outward along the sealing chamber 12 and press against the inner side surface of the fixing plate 31. At this time, the inner side surface of the fixing plate 31 will form a reaction force on the positioning plate 10, so as to drive the limit post 6 and the cover plate 4 to move towards the base 1 through the positioning plate 10 and the top plate 13, which is beneficial to improving the connection tightness between the base 1 and the cover plate 4.

[0040] Further, the extrusion assembly includes a limiting piece 19 provided between the upper and lower top plates 13. The limiting piece 19 is made of a relatively thin steel sheet and has good elasticity. As Figure 6 shown, connection heads 18 are provided at the top and bottom ends of the limiting piece 19, and the connection heads 18 are hinged to the limiting piece 19 through hinges, so that the connection heads 18 can rotate relative to the limiting piece 19. The connection heads 18 are arranged in an arc shape, and the end away from the limiting piece 19 is perpendicular to the bottom surface of the top plate 13. Specifically, a sliding groove 17 is provided on the bottom surface of the top plate 13, and the end of the connection head 18 away from the limiting piece 19 is slidably connected inside the sliding groove 17.

[0041] Furthermore, the limiting piece 19 is arranged in an arc shape. When the upper and lower top plates 13 rotate and approach each other, the limiting piece 19 can be squeezed and bent. Here, two limiting pieces 19 are provided and symmetrically arranged with respect to the width direction of the top plate 13. A sleeve 26 and a sliding rod 27 are provided between the two limiting pieces 19. Specifically, the inside of the sleeve 26 is provided with a receiving chamber, and one end of the sliding rod 27 extends into the receiving chamber and is slidably connected with the sleeve 26 through the receiving chamber. In addition, in order to improve the sealing performance between the sliding rod 27 and the sleeve 26, a sealing plug can be fixedly connected to the end of the sliding rod 27 extending into the sleeve 26 to improve the sealing performance between the two. One ends of the sleeve 26 and the sliding rod 27 close to the limiting piece 19 are both hinged to the limiting piece 19. Specifically, the hinged structure is that a connecting plate is fixedly connected to one ends of the sleeve 26 and the sliding rod 27 close to the limiting piece 19, and a connecting seat is fixedly connected to the inner side surface of the limiting piece 19. The connecting plate and the connecting seat are rotationally connected through a pin shaft. The sleeve 26 and the sliding rod 27 are both arranged at the middle position of the limiting piece 19, so that the limiting piece 19 can drive the sliding rod 27 to move a large distance when it bends.

[0042] In addition, two diversion pipes 16 are symmetrically connected to the outside of the sleeve 26. One end of the diversion pipe 16 away from the sleeve 26 extends upward to the inner wall of the top plate 13 and is connected to the bottom end of the sealing chamber 12. Therefore, the diversion pipe 16 provided is conducive to connecting the sleeve 26 and the sealing chamber 12 to each other.

[0043] For the installation of the limiting piece 19, a through groove 30 is formed on the limiting column 6 between the upper and lower square grooves, and the limiting piece 19 passes through this through groove 30. At the same time, a baffle 8 is fixedly connected to the inner bottom surface of the square groove. The baffle 8 is arranged on both sides of the through groove 30 to limit the limiting piece 19 and improve its stability during the bending process.

[0044] During specific use, when the limiting column 6 is inserted into the limiting hole 32 on the fixing plate 31, the inner wall of the limiting hole 32 squeezes the top plate 13 to make it rotate downward and be received into the square groove. When the upper and lower top plates 13 rotate downward, the connecting head 18 squeezes the limiting piece 19 to make it bend, so that the distance between the two limiting pieces 19 gradually increases. At this time, the sliding rod 27 and the sleeve 26 move relative to each other, so that the sleeve 26 and the sliding rod 27 gradually separate. When one end of the sliding rod 27 moves outward inside the sleeve 26, a negative pressure is formed inside the sleeve 26. Since the sleeve 26 is connected to the sealing chamber 12 on the top plate 13 through the diversion pipe 16, a negative pressure is also formed inside the sealing chamber 12, which drives the positioning plate 10 to move into the sealing chamber 12 and be received inside the sealing chamber 12. This is conducive to the movement of the limiting column 6 inside the limiting hole 32, so that the top plate 13 and the positioning plate 10 pass through the limiting hole 32 and reach the inner side surface of the fixing plate 31. When the top plate 13 and the positioning plate 10 pass over the limiting hole 32, the fixing plate 31 loses the extrusion on the positioning plate 10 and the top plate 13. At this time, under the elastic restoring force of the limiting piece 19 itself, it will gradually reset, so as to gradually reduce the distance between the two limiting pieces 19, thereby compressing the sliding rod 27 and making the sliding rod 27 move towards the sleeve 26. This is conducive to squeezing the gas inside the sleeve 26 into the sealing chamber 12 through the diversion pipe 16, so that the air pressure inside the sealing chamber 12 increases and ejects the positioning plate 10, making the positioning plate 10 tightly clamped on the inner side surface of the fixing plate 31. At this time, the fixing plate 31 forms a certain reaction force on the positioning plate 10, which can drive the positioning plate 10 and the top plate 13 to move towards the base 1, and further drive the limiting column 6 and the cover plate 4 to move towards the base 1, which is conducive to making the connection between the base 1 and the cover plate 4 more tight.

[0045] On both sides of the limiting hole 32 on the fixed plate 31, lead-out grooves 33 are provided, and the lead-out grooves 33 communicate with the limiting hole 32. When the cover plate 4 needs to be disassembled, only by driving the limiting post 6 to rotate through the knob 5 on the outer side of the limiting post 6, the top plate 13 and the positioning plate 10 are aligned with the lead-out groove 33, and then the cover plate 4 can be pulled out.

[0046] Through the arranged positioning plate 10, when the top plate 13 passes over the limiting hole 32 on the fixed plate 31, the positioning plate 10 can abut against the inner side surface of the fixed plate 31. Since the process of squeezing the gas through the guide pipe 16 to the sealing chamber 12 by the sliding rod 27 and the sleeve 26 approaching each other is relatively slow, when the top plate 13 passes over the fixed plate 31, the positioning plate 10 cannot immediately move out. At this time, there is a certain distance between the top plate 13 and the fixed plate 31, which facilitates inserting the top plate 13 into the inner side of the fixed plate 31. Then, as the gas gradually fills the sealing chamber 12, the positioning plate 10 is pushed out, making it clamp the fixed plate 31 and gradually pull the cover plate 4 towards the base 1, thereby improving the connection tightness between the two and being convenient for operation, making the connection between the cover plate 4 and the base 1 more convenient.

[0047] As Figure 3 shown, on the inner side surface of the fixed plate 31, stop grooves 9 are provided at the top and bottom of the limiting hole 32. The stop grooves 9 are arranged in an arc shape. When the top plate 13 rotates downward to squeeze the limiting piece 19 to bend, the positioning plate 10 contracts and moves downward to the stop groove 9, causing the limiting post 6 to move a certain distance away from the base 1.

[0048] Furthermore, a groove 22 is provided on one side of the base 1 close to the cover plate 4. The groove 22 is in a zigzag shape, and a filter frame 25 matched with the groove 22 is fixedly connected to the inner side surface of the cover plate 4.

[0049] Furthermore, the sleeve 26 is made of a heat-conducting material, such as brass or the like.

[0050] During actual use, when the temperature inside the base 1 rises, the temperature of the sleeve 26 rises, causing the temperature of the internal space thereof to rise and the air pressure to increase. The sliding rod 27 can be pushed outwards, so that the distance between the sliding rod 27 and the sleeve 26 gradually increases, thereby squeezing the limiting piece 19 outwards, causing the two limiting pieces 19 to bend outwards, further driving the top plate 13 to rotate downwards, thereby prompting the positioning plate 10 to move downwards into the stop groove 9. Since the stop groove 9 is arc-shaped and bends away from the base 1, when the positioning plate 10 moves downwards to the stop groove 9, the positioning plate 10 together with the entire limiting column 6 will move away from the base 1, making the positioning plate 10 in close contact with the stop groove 9. At this time, the limiting column 6 and the cover plate 4 move outwards to have a certain distance from the base 1 and form an exhaust gap 7, and the filter frame 25 also moves out of the groove 22. At this time, the heat inside the base 1 can be discharged through this exhaust gap 7, so as to accelerate the heat dissipation of the electrical components inside the base 1, and the dust can be filtered by the provided filter frame 25 to prevent the dust in the air from entering the base 1.

[0051] With the limiting piece 19 provided in this structure, when the temperature inside the base 1 is too high, an exhaust gap 7 is formed between the cover plate 4 and the base 1, so as to accelerate the discharge of the heat inside the base 1. When the temperature inside the base 1 drops later, the air inside the sleeve 26 gradually contracts and its air pressure decreases, thereby driving the sliding rod 27 to contract. At this time, the limiting piece 19 gradually resets and drives the top plate 13 to move upwards, making the positioning plate 10 move upwards and out of the outside of the stop groove 9. At this time, the reaction force of the fixing plate 31 on the positioning plate 10 can drive the limiting column 6 and the cover plate 4 to move towards the base 1, so that the cover plate 4 is tightly connected to the base 1. To sum up, when the temperature inside the base 1 is high, this device can assist in heat dissipation through the exhaust gap 7, and when the temperature inside the base 1 is normal, the base 1 is tightly connected to the cover plate 4 to prevent external dust from entering the base 1.

[0052] As Figure 9-10 shown, a support frame 20 is fixedly connected to the inner side surface of the cover plate 4, and the filter frame 25 is fixed to the outside of the support frame 20, so as to facilitate the installation of the filter frame 25. A sliding plate 21 is slidably connected inside the groove 22, and the sliding plate 21 is in a shape of a Chinese character "hui". A first magnetic strip 28 is fixedly connected to one side of the sliding plate 21 close to the support frame 20, and a second magnetic strip 29 that cooperates with the first magnetic strip 28 is fixedly connected to the side surface of the support frame 20. And the inner wall of the support frame 20 is in contact with the inner bottom surface of the groove 22 to limit the cover plate 4, so that the cover plate 4 does not shake when installed on one side of the base 1. A return spring 23 is arranged inside the sliding plate 21, and the return spring 23 is fixedly arranged between the inner end wall of the groove 22 and the sliding plate 21.

[0053] Further, a through exhaust groove 24 is formed in the sliding plate 21.

[0054] During actual use, when the positioning plate 10 moves downward to the stop groove 9, the reset spring 23 can drive the cover plate 4 to move outward. When the first magnetic strip 28 adsorbs to the second magnet, the sliding plate 21 can be driven to slide outward inside the groove 22. Since the sliding plate 21 is hermetically connected to the groove 22, when the sliding plate 21 moves outward, external air can enter the inside of the groove 22 at the inner side of the sliding plate 21 through the exhaust groove 24. When the cover plate 4 resets and contacts the base 1, the support frame 20 can drive the sliding plate 21 to slide inward, thereby squeezing the air inside the groove 22 out through the exhaust groove 24 to form an air flow, blowing away the dust filtered on the filter frame 25, cleaning the filter frame 25, and prolonging its service life.

Claims

1. A housing for a surge protection device, comprising a base and a cover plate disposed on one side of the base. The cover plate and the base are detachably connected by a limiting mechanism. The limiting mechanism includes a limiting post rotatably disposed on the cover plate. An fixing plate is fixedly connected to the inner wall of the base. A limiting hole matching the limiting post is formed in the fixing plate. Characterized in that: At the top and bottom of the limiting post, top plates are hinged. A sealing chamber is formed on the side surface of the top plate away from the hinge axis. A positioning plate is slidably connected inside the sealing chamber. A square groove is formed on the outer circumferential surface of the limiting post. The top plate is hinged inside the square groove. On both sides of the limiting hole on the fixing plate, lead-out grooves are formed. The lead-out grooves are communicated with the limiting hole. When disassembling the cover plate, by rotating the limiting post, the top plate and the positioning plate are aligned with the lead-out grooves, so that the cover plate can be pulled out; An extrusion assembly is disposed between the upper and lower top plates. When the top plate and the positioning plate cross the fixing plate, the top plate is clamped on the inner side surface of the fixing plate. The extrusion assembly drives the positioning plate to slide outward along the sealing chamber and abut against the inner side surface of the fixing plate; The extrusion assembly includes a limiting piece disposed between the upper and lower top plates. The limiting piece is arc-shaped. Connecting heads are disposed at the top end and the bottom end of the limiting piece. The connecting head and the limiting piece are hinged to each other. A sliding groove is formed on the bottom surface of the top plate. The end of the connecting head away from the limiting piece is slidably connected inside the sliding groove. When the upper and lower top plates rotate and approach each other, the limiting piece is extruded and bent; A sleeve and a sliding rod are disposed between the two limiting pieces. The inside of the sleeve is a receiving chamber. One end of the sliding rod extends into the receiving chamber and is slidably connected to the sleeve through the receiving chamber. The ends of the sleeve and the sliding rod close to the limiting piece are both hinged to the limiting piece; Two diversion pipes are symmetrically communicated with the outside of the sleeve. The end of the diversion pipe away from the sleeve extends upward to the inner wall of the top plate and is communicated with the bottom end of the sealing chamber.

2. The housing for a surge protection device according to claim 1, Characterized in that: A limiting spring is disposed at the bottom of the top plate. The limiting spring is fixedly connected to the inner bottom surface of the square groove. A limiting plate is disposed on the outer side surface of the top plate. The limiting plate is fixedly connected to the inner wall of the square groove. When the top plate rotates upward and contacts the limiting plate, the top plate rotates to the limit position.

3. The housing for a surge protection device according to claim 1, Characterized in that: Arc-shaped stop grooves are formed at the top and bottom of the limiting hole on the inner side surface of the fixing plate. When the top plate rotates downward to extrude the limiting piece to bend, the positioning plate moves downward to the stop groove, so that the cover plate moves away from the base and forms an exhaust gap between the cover plate and the base.

4. The housing for a surge protection device according to claim 1, Characterized in that: A groove is formed on the side of the base close to the cover plate. The groove is in a shape of a double square frame. A filter frame matching the groove is fixedly connected to the inner side surface of the cover plate.

5. The housing for a surge protection device according to claim 4, Characterized in that: A support frame is fixedly connected to the inner side surface of the cover plate. The filter frame is fixed to the outer side of the support frame. A sliding plate is slidably connected inside the groove. A first magnetic strip is fixedly connected to the side of the sliding plate close to the support frame. A second magnetic strip that cooperates with the first magnetic strip is fixedly connected to the side surface of the support frame. The inner wall of the support frame is in contact with the inner bottom surface of the groove. A return spring is arranged inside the sliding plate. The return spring is fixedly arranged between the inner end wall of the groove and the sliding plate. An exhaust groove is formed through the sliding plate.

6. The housing for a surge protection device according to claim 1, characterized in that: A through groove is formed in the limiting post. The limiting piece passes through this through groove. Baffles are arranged on both sides of the through groove.

7. A related surge protection device, characterized in that: It includes a surge protection device body, and the surge protection device body is installed inside the housing according to any one of claims 1-6.

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