A composite surge protector with double arc extinguishing

Abstract

The present invention discloses a composite surge protector with dual arc extinguishing, comprising a first arc extinguishing protection module and a second arc extinguishing protection module; wherein the first arc extinguishing protection module is a self-blowing arc extinguishing graphite gap surge protection device, and the second arc extinguishing protection module is composed of a varistor and a discharge tube connected in series; the second arc extinguishing protection module is located above the first arc extinguishing protection module, and the first arc extinguishing protection module and the second arc extinguishing protection module are connected in parallel to form a composite surge protector with dual arc extinguishing. By providing the first and second arc extinguishing protection modules in parallel, the present invention adds an arc extinguishing function to both protection modules, thereby enabling the composite surge protector to have a high continuous current interruption capability and no leakage current, thereby improving the performance and life of the composite surge protector.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arrester alarm equipment, in particular to a composite surge protector with double arc extinguishing. Background Art

[0002] A lightning arrester, also known as a surge protection device (SPD), is an electronic device that provides safety protection for various electronic devices, instruments, and communication lines. When external interference suddenly generates a spike in current or voltage in an electrical circuit or communication line, the surge protector quickly conducts and diverts the current, preventing damage to other devices in the circuit.

[0003] Traditional composite surge protectors consist of a Class B discharge gap and a Class C voltage-limiting device connected in parallel. The Class B discharge gap in traditional composite surge protectors contains only a simple insulating ring and lacks an arc extinguishing device. Consequently, their continuous current interruption capability cannot meet the high continuous current generated by high through-current conditions. The Class C voltage-limiting device, being a separate voltage-limiting device, can easily lead to a mismatch in starting voltage between the two levels. Furthermore, the leakage current generated by the voltage-limiting device cannot be avoided, which accelerates its aging and can lead to safety incidents such as fires. Furthermore, traditional composite surge protectors lack remote alarms and alarm indicator windows.

[0004] Based on the above background and problems, it is necessary to develop a new type of surge protector with dual arc extinguishing and its 5G power on-board circuit board to meet the tripping function and alarm function of the small-sized, large-current on-board lightning arrester product. Summary of the Invention

[0005] The main purpose of the present invention is to provide a composite surge protector with dual arc extinguishing and a 5G power supply on-board circuit board thereof, aiming to solve the technical problems in the prior art that the continuous current interruption capability of the traditional composite surge protector cannot meet the high continuous current generated under large through-current conditions, and cannot avoid the leakage current generated by the voltage-limiting device.

[0006] To achieve the above-mentioned purpose, an embodiment of the present invention provides a composite surge protector with double arc extinguishing, the composite surge protector comprising a first arc extinguishing protection module and a second arc extinguishing protection module; wherein,

[0007] The first arc extinguishing protection module is a self-blowing arc extinguishing graphite gap surge protection device, and the second arc extinguishing protection module is composed of a varistor and a discharge tube in series;

[0008] The second arc extinguishing protection module is located above the first arc extinguishing protection module, and the first arc extinguishing protection module and the second arc extinguishing protection module are connected in parallel to form the composite surge protector with double arc extinguishing.

[0009] Furthermore, the self-blowing arc-extinguishing graphite gap surge protection device includes a first module box, a self-blowing arc-extinguishing graphite gap surge protection unit and a first tripping unit; wherein,

[0010] The self-blowing arc-extinguishing graphite gap surge protection unit is located inside the first module box body, and the first tripping unit is located outside the first module box body. The self-blowing arc-extinguishing graphite gap surge protection unit is welded to the first tripping unit through the first through hole of the first module box body.

[0011] Furthermore, the first tripping unit includes a first elastic piece, a slide plate and a first spring; wherein,

[0012] One end of the first spring is connected to the slide plate, and the other end is connected to the first module box body;

[0013] The slide plate abuts against the connection between the first elastic piece and the welding point of the self-blowing arc-extinguishing graphite gap surge protection unit, and the slide plate is used for placing the alarm unit.

[0014] Furthermore, the self-blowing arc-extinguishing graphite gap surge protection unit includes two electrodes arranged opposite to each other and a self-blowing arc-extinguishing graphite gap structure arranged between the two electrodes; wherein, one of the electrodes is welded to the first spring piece through the first through hole of the first module box body.

[0015] Furthermore, the second arc extinguishing protection module further includes a second module box and a second arc extinguishing tripping unit; wherein,

[0016] One end of the varistor is electrically connected to one end of the discharge tube and is located in the second module box body, and the second arc extinguishing tripping unit is located outside the second module box body;

[0017] The other end of the varistor is electrically connected to an electrode of the self-blowing arc-extinguishing graphite gap surge protection unit by welding through the second through hole of the second module box body and the second arc-extinguishing tripping unit, and the other end of the discharge tube is electrically connected to the other electrode of the self-blowing arc-extinguishing graphite gap surge protection unit.

[0018] Furthermore, the second arc extinguishing tripping unit includes a second elastic piece, a rotating shaft, a rotating disk and a second spring; wherein,

[0019] The rotating shaft is fixed on the second module box body, and the turntable rotates relative to the rotating shaft;

[0020] One end of the second spring is connected to the turntable, and the other end is connected to the second module box body;

[0021] The rotating disk abuts against the connection between the second elastic piece and the varistor welding point;

[0022] An arc extinguishing grid is further provided on the rotating disk, and the arc extinguishing grid is located on the rebound path of the second elastic piece.

[0023] Furthermore, a slider and a connecting column are provided on the turntable, and the slider and the connecting column are respectively located on both sides of the turntable, one end of the second spring is connected to the connecting column, and the slider is used to place the alarm unit.

[0024] Furthermore, the arc extinguishing grid is designed to be curved.

[0025] Furthermore, the alarm unit is a colored cardboard and is pasted on the slider or the slide.

[0026] Furthermore, the surge protector further includes a shell, and the first arc extinguishing protection module and the second arc extinguishing protection module are located in the shell.

[0027] Compared with the prior art, the composite surge protector with dual arc extinguishing type proposed in the present invention has a first arc extinguishing protection module and a second arc extinguishing protection module arranged in parallel. Both protection modules have an arc extinguishing function, so that the composite surge protector has a high continuous current interruption capability and no leakage current, thereby improving the performance and life of the composite surge protector. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0029] Figure 1 This is a structural diagram of an embodiment of a composite surge protector with double arc extinguishing according to the present invention;

[0030] Figure 2 This is a partial structural diagram of a composite surge protector with double arc extinguishing according to the present invention;

[0031] Figure 3 This is a partial structural diagram of a composite surge protector with double arc extinguishing according to the present invention;

[0032] Figure 4 for Figure 2 Schematic diagram of the structure of the self-blowing arc-extinguishing graphite gap surge protection unit;

[0033] Figure 5 for Figure 4 Schematic diagram of the structure of the middle insulating ring;

[0034] Figure 6 for Figure 4 Schematic diagram of the structure of the middle insulating column;

[0035] Figure 7 for Figure 4 Schematic diagram of the principle of self-blowing arc extinguishing;

[0036] Figure 8 The electrical schematic diagram of a composite surge protector with double arc extinguishing according to the present invention.

[0037] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0038] Description of Figure Numbers:

[0039]

[0040] DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0044] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.

[0045] Please also refer to Figures 1 to 3 , Figure 1 This is a structural diagram of an embodiment of a composite surge protector with double arc extinguishing according to the present invention; Figure 2 and Figure 3 The diagram is a partial structural diagram of a composite surge protector with double arc extinguishing according to the present invention.

[0046] like Figure 1 As shown, the composite surge protector 10 with dual arc extinguishing function in this embodiment is applied to a power supply lightning protection device. The composite surge protector 10 includes a first arc extinguishing protection module 100 and a second arc extinguishing protection module 200 .

[0047] Among them, the first arc extinguishing protection module 100 is a self-blowing arc extinguishing type graphite gap surge protection device, and the second arc extinguishing protection module 200 is composed of a varistor 201 and a discharge tube 202 connected in series; the second arc extinguishing protection module 200 is located above the first arc extinguishing protection module 100, and the first arc extinguishing protection module 100 and the second arc extinguishing protection module 200 are connected in parallel to form a composite surge protector 10 with double arc extinguishing.

[0048] The composite surge protector 10 with dual arc extinguishing provided in this embodiment has a first arc extinguishing protection module 100 and a second arc extinguishing protection module 200 arranged in parallel. Both protection modules have an arc extinguishing function, so that the composite surge protector 10 has a high continuous current interruption capability and no leakage current, thereby improving the performance and life of the composite surge protector 10.

[0049] The surge protector 10 also includes a housing 11, in which the first arc extinguishing protection module 100 and the second arc extinguishing protection module 200 are located. The electrodes on the surge protector 10 are connected to the snap-fitting pieces of the housing 11, and the surge protector 10 is snap-fitted and fixed to the housing 11 to form a surge protector.

[0050] Assuming the first arc-extinguishing protection module 100 is a Class B protection structure, and the second arc-extinguishing protection module 200 is a Class C protection structure, the B+C parallel structure also addresses the afterflow interruption issues of gap-type SPDs and the leakage issues of voltage-limiting devices. It is primarily used in AC power systems to provide differential and common-mode protection for electrical equipment. In this embodiment, Class B utilizes a graphite gap with a self-blowing arc-extinguishing structure, primarily addressing the afterflow interruption issue. Class C utilizes a varistor in series with a gas discharge tube, primarily addressing inter-stage coordination and achieving low residual voltage output. Both Classes B and C incorporate built-in disconnectors and remote alarm functions.

[0051] Specifically, the self-blowing arc-extinguishing graphite gap surge protection device 100 includes a first module box body 110, a self-blowing arc-extinguishing graphite gap surge protection unit 120 and a first tripping unit 130; wherein, the self-blowing arc-extinguishing graphite gap surge protection unit 120 is located inside the first module box body 110, and the first tripping unit 130 is located outside the first module box body 110, and the self-blowing arc-extinguishing graphite gap surge protection unit 120 is welded to the first tripping unit 130 through the first through hole 111 of the first module box body 110.

[0052] The first module box body 110 is a square box body. The accommodating cavity inside the square box body is used to place the self-blowing arc-extinguishing graphite gap surge protection unit 120, and the first trip unit 130 is placed on one side of the square box body; a first through hole 111 is provided on the first module box body 110 to facilitate welding the electrode protrusion of the self-blowing arc-extinguishing graphite gap surge protection unit 120 inside the square box body to the spring piece of the first trip unit 130 outside the square box body to achieve electrical connection.

[0053] Furthermore, the first trip unit 130 includes a first spring 131, a slide 132, and a first spring 133. One end of the first spring 133 is connected to the slide 132, and the other end is connected to the first module housing 110. The slide 132 abuts the welded joint between the first spring 131 and the self-blowout graphite gap surge protection unit 120. The slide 132 is used to house the alarm unit 140. The alarm unit 140 is a colored cardboard affixed to the slide 132. Specifically, the alarm unit 240 is made of red or green cardboard, depending on actual needs.

[0054] In a specific application, the slide plate 132 is made of a high-temperature resistant material and is integrally formed. In this embodiment, the first spring 133 is located in the middle of the slide plate 132. The first spring 133 is a spring with hooks at both ends. The connection points at both ends of the first spring 133 can be designed as circular through-holes added to the connecting column, so that the hook of the first spring 133 can pass through the circular through-holes to achieve elastic connection. This design shape has a strong connection. In other embodiments, the connection points at both ends of the spring can also be designed as concave rings added to the connecting column, so that the hook of the first spring 133 can be stuck in the concave ring. At this time, the expansion and contraction direction of the spring is perpendicular to the direction of the connecting column. In some other practical applications, the two can also be combined and selected according to needs, which is not limited here. In some embodiments, the first spring 133 can also be a spring with a hook at one end or a spring without a hook, etc. Similarly, the design shape of the spring connection point can also be conventionally designed according to actual conditions, which will not be repeated here.

[0055] The first trip unit 130 is implemented as follows: one end of a first spring 131 is welded to the electrode 121, and the other end of the first spring 131 is welded to an external pin electrode and fixed to the first module housing 110. A slide 132 is fixed to the guide rail of the first module housing 110. A first spring 132 connects the slide 132 and the first module housing 110, forming a force-bearing member. When the first spring 131 is separated from the electrode 121, the slide 132 slides in the direction of the force, and the color of the window (i.e., the alarm unit 140) changes, thereby determining whether the first arc protection module 100 has failed.

[0056] In this embodiment, the self-blowing arc-extinguishing graphite gap surge protection unit 120 includes two electrodes arranged opposite to each other and a self-blowing arc-extinguishing graphite gap structure arranged between the two electrodes, specifically a first electrode 121 and a second electrode 122 arranged opposite to each other; wherein, one electrode 121 is welded to the first spring piece 131 through the first through hole 111 of the first module box body 110.

[0057] See also Figure 4 The self-blowing arc-extinguishing graphite gap surge protection unit 120 includes a first electrode 121, a second electrode 122, and a self-blowing arc-extinguishing graphite gap structure located between the first and second electrodes 121, 122. The first and second electrodes 121, 122 are disposed opposite each other and connected to the second arc-extinguishing protection module 200. Specifically, the first electrode 121 is electrically connected to the varistor 201 of the second arc-extinguishing protection module 200, and the second electrode 122 is electrically connected to the discharge tube 202 of the second arc-extinguishing protection module 200. In this embodiment, both the first and second electrodes 121, 122 have two electrode pins.

[0058] The self-blowing arc-extinguishing graphite gap structure includes two insulating pillars 123 arranged opposite each other to form a receiving cavity, multiple insulating rings 124 positioned within the receiving cavity, and multiple graphite electrodes 125 positioned on the insulating rings. Both the insulating pillars 123 and the multiple insulating rings 124 are provided with arc-extinguishing cavities, which are connected to form a gas channel to extinguish arcs generated between the graphite electrodes 125. The multiple graphite electrodes 125 are spaced apart from the multiple insulating rings 124, with adjacent graphite electrodes 125 located on either side of the same insulating ring 124, and a gap exists between adjacent graphite electrodes 125. The number of graphite electrodes 125 is equal to the number of insulating rings 124 plus one. To ensure a gap between the two graphite electrodes 125 and the insulating rings 124 when they contact each other, the two sides of the graphite electrodes 125 are designed in a stepped manner. In this embodiment, the graphite electrodes 125 are circular in shape; in other embodiments, they can be rectangular, elliptical, or other shapes. The thickness of each graphite electrode 125 can be equal or unequal.

[0059] The self-blowing arc-extinguishing graphite gap structure also includes a circuit board 126, which is located at the junction of the two insulating pillars 123 and is electrically connected to the graphite electrode 125. Circuit board 126 is provided with multiple capacitors and multiple ejector pins. The ejector pins are connected to the capacitors via wiring on the circuit board, and are directly connected to the graphite electrode 125.

[0060] like Figure 5 As shown, opposite lugs 1241 are provided on both sides of the insulating ring 124 , each lug is provided with a through hole 1242 , and the gap between the through hole 1242 and the graphite electrode 125 on the insulating ring 124 forms an arc extinguishing cavity of the insulating ring 124 .

[0061] like Figure 6 As shown, the arc-extinguishing chamber of the insulating column 123 is provided with an air inlet arc-extinguishing channel 1231 and an air outlet arc-extinguishing channel 1232 arranged opposite each other, as well as multiple slots 1233 for engaging the multiple insulating rings 124. The slots 1233 are used to retain the lugs 1241. Each slot 1233 is provided with a slotted hole 1234 corresponding to the through hole 1242. The slots 1234 communicate with the upper arc-extinguishing channel 1231 and the lower arc-extinguishing channel 1232, forming the arc-extinguishing chamber of the insulating column 123. Specifically, the air inlet arc-extinguishing channel 1231 and the air outlet arc-extinguishing channel 1232 are each provided with a slot 1233 corresponding one-to-one with the lugs 1241.

[0062] Specifically, the gas outlet arc extinguishing channel 1232 is provided with a first gas outlet arc extinguishing channel A and a second gas outlet arc extinguishing channel B, and the slots 1234 of the gas outlet arc extinguishing channel 1232 are sequentially connected to the first gas outlet arc extinguishing channel A and the second gas outlet arc extinguishing channel B.

[0063] The inlet arc-extinguishing channel 1231 is provided with a first piston column 1235 and a first spring 1236. The first piston column 1235 is located at the entrance of the inlet arc-extinguishing channel 1231. The first spring 1236 abuts the first piston column 1235 and is located inside the inlet arc-extinguishing channel 1231. The outlet arc-extinguishing channel 1232 is provided with a second piston column 1237 and a second spring 1238. The second piston column 1237 is located at the exit of the outlet arc-extinguishing channel 1231. The second spring 1238 abuts the second piston column 1237 and is located outside the outlet arc-extinguishing channel 1232.

[0064] Specific implementation method of the self-blowing arc-extinguishing graphite gap surge protection unit 120: The protection unit 120 adopts a self-blowing arc-extinguishing principle. The key structure for realizing this principle is the arc-extinguishing chamber composed of the air holes (i.e., the through hole 1242 and the slot 1234) on the insulating ring 124 and the insulating column 123. It mainly utilizes the rapid rise in temperature inside the cavity at the moment of lightning current discharge, the rapid expansion of the gas, the increase in internal pressure, and the second piston column 1237 opens under the action of pressure. At this time, the thermal ionized gas is discharged. When the lightning current is released, the gas temperature inside the graphite discharge gap drops, forming a short-term approximate vacuum state. At this time, the external pressure is greater than the internal pressure. The first piston column 1235 opens, and cold air enters the graphite discharge gap to form air convection. Therefore, the arc is forced to be stretched to the arc-extinguishing chamber, thereby achieving arc extinguishing.

[0065] See also Figure 3 The second arc-extinguishing protection module 200 also includes a second module housing 210 and a second arc-extinguishing tripping unit 230. One end of the varistor 201 is electrically connected to one end of the discharge tube 202 and is located inside the second module housing 210. The second arc-extinguishing tripping unit 230 is located outside the second module housing 210. The other end of the varistor 201 is electrically connected to the first electrode 121 of the self-blow-out arc-extinguishing graphite gap surge protection unit 120 by welding through the second through-hole 211 of the second module housing 210 and the second arc-extinguishing tripping unit 230. The other end of the discharge tube 202 is electrically connected to the other electrode 122 of the self-blow-out arc-extinguishing graphite gap surge protection unit 120.

[0066] The second module housing 210 is a flat, square-shaped housing located on the upper side of the first module housing 110. The housing cavity within the flat, square-shaped housing accommodates the varistor 201 and the discharge tube 202. Specifically, the second module housing 210 snaps the varistor 201 and discharge tube 202 into the cavity and is located on the first module housing 110. The bottom surface area of ​​the second module housing 210 is substantially the same as the top surface area of ​​the first module housing 110, forming a single unit when the first and second module housings 110 and 210 are snapped together. A second arc-extinguishing trip unit 230 is located on the top surface of the second module housing 210 and trips and extinguishes the arc in the event of damage to the varistor 201 within the second module housing 210.

[0067] Specifically, the second arc-extinguishing trip unit 230 includes a second spring 231, a rotating shaft 232, a rotating disk 233, and a second spring 234. The rotating shaft 232 is fixed to the second module housing 210, and the rotating disk 233 rotates relative to the rotating shaft 232. One end of the second spring 234 is connected to the rotating disk 233, and the other end of the second spring 234 is connected to the second module housing 230. The rotating disk 233 abuts the connection between the second spring 231 and the welded joint of the varistor 201. An arc chute 235 is also provided on the rotating disk 233. The arc chute 235 is made of a metal block and is formed by grooves in the metal block to form a grid shape. The arc chute 235 can also have a serrated shape. The arc chute 235 is located along the rebound path of the second spring 231. The rebound path of the second spring 231 is curved, resulting in the arc chute 235 being curved and unfolding as a portion of a fan shape.

[0068] In this embodiment, the turntable 233 includes a turntable surface, side surfaces, and a hollow cavity. The turntable surface and side surfaces 2332 enclose the hollow cavity, which occupies 70% to 90% of the entire disk. The remaining portion houses the welding location between the second spring 231 and the varistor 201. When the welding point between the second spring 231 and the varistor 201 melts, the turntable 233 rotates under the elastic action of the second spring 234. The side of the turntable 233 blocks the electrical isolation between the second spring 231 and the varistor 201, thereby providing lightning protection. Similarly, the second spring 234 is a spring with hooks at both ends. The structure and principle of the connection points of the second spring 234 are basically the same as those of the first spring 133, and will not be repeated here.

[0069] The turntable 233 is equipped with a slider 236 and a connecting post 237, located on either side of the turntable. One end of the second spring 234 is connected to the connecting post 237. The slider 236 is used to house the alarm unit 240. The alarm unit 240 is a colored cardboard affixed to the sliding plate of the slider 236. Specifically, the alarm unit 240 can be red or green cardboard, depending on actual needs.

[0070] The specific implementation method of the second arc extinguishing tripping unit 230: one end of the second spring 234 is connected to the second module box body 210, and the other end is connected to the turntable 233. The turntable 233 is a force-bearing part. When the second spring 234 is separated from the varistor 201, the turntable 233 is forced to rotate counterclockwise, thereby driving the slider 236 to slide, causing the color of the indicator window corresponding to the slider 236 (that is, the alarm unit 240) to change, thereby judging whether the second arc extinguishing protection module 200 has failed.

[0071] In summary, the first arc extinguishing protection module 100 and the second arc extinguishing protection module 200 are respectively installed in different module boxes, and are connected by connecting parts to form a parallel structure of the upper and lower modules. The second arc extinguishing protection module 200 is located at the top and the first arc extinguishing protection module 100 is located at the bottom, wherein the trigger capacitor and the circuit board are located below the self-blowing arc extinguishing type graphite gap structure of the first arc extinguishing protection module 100, and the copper spring pins on the circuit board are connected to the graphite electrodes of the self-blowing arc extinguishing type graphite gap structure to induce graphite gap breakdown, and alarm windows are set on the top and sides of the composite surge protector product with double arc extinguishing to facilitate identification of whether the product has failed.

[0072] This dual-arc-extinguishing composite surge protector provides a protective solution for low-voltage power systems, aiming to improve their safety, reliability, and service life. Features include a compact design, remote alarm functionality, and an alarm indicator window. High continuous current interruption capability, zero leakage current, and a built-in trip mechanism prevent fires and other safety incidents caused by degradation of the voltage-limiting device during use.

[0073] To sum up, it is easy for those skilled in the art to understand that the composite surge protector with dual arc extinguishing type proposed in the present invention has a first arc extinguishing protection module and a second arc extinguishing protection module arranged in parallel, and both protection modules have added arc extinguishing functions, so that the composite surge protector has high continuous current interruption capability and no leakage current, thereby improving the performance and life of the composite surge protector.

[0074] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the embodiment of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the embodiment of the present invention under the inventive concept of the embodiment of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the embodiment of the present invention.

Claims

1. A composite surge protector with double arc extinguishing, characterized in that: The composite surge protector includes a first arc extinguishing protection module and a second arc extinguishing protection module; wherein, The first arc extinguishing protection module is a self-blowing arc extinguishing graphite gap surge protection device, and the second arc extinguishing protection module is composed of a varistor and a discharge tube in series; The second arc extinguishing protection module is located above the first arc extinguishing protection module, and the first arc extinguishing protection module and the second arc extinguishing protection module are connected in parallel to form the composite surge protector with double arc extinguishing; The self-blowing arc-extinguishing graphite gap surge protection device comprises a first module box, a self-blowing arc-extinguishing graphite gap surge protection unit and a first tripping unit; wherein, The self-blowing arc-extinguishing graphite gap surge protection unit is located inside the first module box body, and the first tripping unit is located outside the first module box body. The self-blowing arc-extinguishing graphite gap surge protection unit is welded to the first tripping unit through the first through hole of the first module box body; The first tripping unit includes a first elastic piece, a slide plate and a first spring; wherein, One end of the first spring is connected to the slide plate, and the other end is connected to the first module box body; The slide plate abuts against the connection between the first spring piece and the welding point of the self-blowing arc-extinguishing graphite gap surge protection unit, and the slide plate is used to place the alarm unit; The self-blowing arc-extinguishing graphite gap surge protection unit includes two electrodes arranged opposite to each other and a self-blowing arc-extinguishing graphite gap structure arranged between the two electrodes; wherein one of the electrodes is welded to the first spring piece through the first through hole of the first module box body; The self-blowing arc-extinguishing graphite gap structure comprises two insulating columns arranged opposite to each other to form an accommodating cavity, a plurality of insulating rings located in the accommodating cavity, and a plurality of graphite electrodes located on the insulating rings.

2. The composite surge protector according to claim 1, characterized in that: The second arc extinguishing protection module further includes a second module box and a second arc extinguishing tripping unit; wherein, One end of the varistor is electrically connected to one end of the discharge tube and is located in the second module box body, and the second arc extinguishing tripping unit is located outside the second module box body; The other end of the varistor is electrically connected to an electrode of the self-blowing arc-extinguishing graphite gap surge protection unit by welding through the second through hole of the second module box body and the second arc-extinguishing tripping unit, and the other end of the discharge tube is electrically connected to the other electrode of the self-blowing arc-extinguishing graphite gap surge protection unit.

3. The composite surge protector according to claim 2, characterized in that: The second arc extinguishing tripping unit includes a second elastic piece, a rotating shaft, a rotating disk and a second spring; wherein, The rotating shaft is fixed on the second module box body, and the turntable rotates relative to the rotating shaft; One end of the second spring is connected to the turntable, and the other end is connected to the second module box body; The rotating disk abuts against the connection between the second elastic piece and the varistor welding point; An arc extinguishing grid is further provided on the rotating disk, and the arc extinguishing grid is located on the rebound path of the second elastic piece.

4. The composite surge protector according to claim 3, characterized in that: The turntable is provided with a slider and a connecting column, the slider and the connecting column are respectively located on both sides of the turntable, one end of the second spring is connected to the connecting column, and the slider is used to place the alarm unit.

5. The composite surge protector according to claim 4, characterized in that: The arc extinguishing grid is designed to be curved.

6. The composite surge protector according to claim 4, characterized in that: The alarm unit is a colored cardboard and is pasted on the slider or the slide.

7. The composite surge protector according to claim 1, characterized in that: The surge protector further includes a housing, and the first arc extinguishing protection module and the second arc extinguishing protection module are located in the housing.

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