A self-blowing arc-extinguishing graphite gap surge protection device and surge protector

Abstract

The present invention discloses a self-blowing arc-extinguishing graphite gap surge protection device and a surge protector. The surge protection device includes a first electrode, a second electrode, and a self-blowing arc-extinguishing graphite gap structure located between the first and second electrodes; wherein the first electrode and the second electrode are arranged opposite each other and connected to an external circuit; the self-blowing arc-extinguishing graphite gap structure includes two insulating columns arranged oppositely to form an accommodating cavity, a plurality of insulating rings located within the accommodating cavity, and a plurality of graphite electrodes located on the insulating rings; wherein the two insulating columns and the plurality of insulating rings are each provided with an arc-extinguishing cavity, and the arc-extinguishing cavities are connected to form a gas channel to extinguish the arc generated between the graphite electrodes. The present invention provides arc-extinguishing cavities on both the insulating columns and the insulating rings, thereby forming a gas channel through which gas can flow, thereby extinguishing the arc generated by the graphite electrodes. The high continuous current interruption capability of the surge protection device is greatly improved, thereby optimizing the performance of the surge protection device.

Description

Technical Field

[0001] The present invention relates to the technical field of lightning arrester alarm equipment, in particular to a self-blowing arc-extinguishing graphite gap surge protection device and a surge protector. 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 surge protectors only have simple insulating rings placed in the graphite discharge gap, and no arc extinguishing device. Their continuous current interruption capability cannot meet the high continuous current generated under large through-current conditions; the arc generated in the graphite discharge gap cannot be eliminated, affecting the protection performance of the surge protector.

[0004] Based on the above background and problems, it is necessary to develop a new type of self-blowing arc-extinguishing graphite gap surge protection device and surge protector to meet the requirements of small-volume, large-current lightning arrester products. Summary of the Invention

[0005] The main purpose of the present invention is to provide a self-blowing arc-extinguishing graphite gap surge protection device and a surge protector, aiming to solve the technical problem that the continuous current interruption capability of the surge protector in the prior art cannot meet the high continuous current generated under large through-current conditions.

[0006] To achieve the above objectives, an embodiment of the present invention provides a self-blowing arc-extinguishing graphite gap surge protection device, which includes a first electrode, a second electrode, and a self-blowing arc-extinguishing graphite gap structure located between the first electrode and the second electrode; wherein,

[0007] The first electrode and the second electrode are arranged opposite to each other and connected to an external circuit;

[0008] The self-blowing arc-extinguishing graphite gap structure includes two insulating columns arranged relative to each other to form an accommodating cavity, multiple insulating rings located in the accommodating cavity, and multiple graphite electrodes located on the insulating rings, wherein the two insulating columns and the multiple insulating rings are each provided with an arc-extinguishing cavity, and the arc-extinguishing cavities are connected to form a gas channel to extinguish the arc generated between the graphite electrodes.

[0009] Furthermore, the plurality of graphite electrodes are spaced apart from the plurality of insulating rings, adjacent graphite electrodes are located on both sides of the same insulating ring, and there are gaps between the graphites; wherein the number of the graphite electrodes is equal to the number of the insulating rings plus one.

[0010] Furthermore, opposite lugs are provided on both sides of the insulating ring, each lug is provided with a through hole, and the gap between the through hole and the graphite electrode on the insulating ring forms an arc extinguishing cavity of the insulating ring.

[0011] Furthermore, the arc extinguishing chamber of the insulating column is provided with relatively arranged air inlet arc extinguishing channels and air outlet arc extinguishing channels and a plurality of slots for engaging a plurality of the insulating rings, and the slots are used to clamp the lugs; each of the slots is provided with a slot hole corresponding to the through hole, and the slot hole is connected with the air inlet arc extinguishing channel and the air outlet arc extinguishing channel to form the arc extinguishing chamber of the insulating column.

[0012] Furthermore, the gas outlet arc extinguishing channel is provided with a first gas outlet arc extinguishing channel and a second gas outlet arc extinguishing channel, and the slots of the gas outlet arc extinguishing channel are sequentially and spacedly connected with the first gas outlet arc extinguishing channel and the second gas outlet arc extinguishing channel.

[0013] Furthermore, the air intake arc extinguishing channel is provided with a first piston column and a first spring; wherein, the first piston column is located at the entrance of the air intake arc extinguishing channel; the first spring abuts against the first piston column and is located in the air intake arc extinguishing channel.

[0014] Furthermore, the gas outlet arc extinguishing channel is provided with a second piston column and a second spring; wherein, the second piston column is located at the outlet of the gas outlet arc extinguishing channel; the second spring abuts against the first piston column and is located outside the gas outlet arc extinguishing channel.

[0015] Furthermore, both sides of the graphite electrode are designed in a stepped manner.

[0016] Furthermore, the self-blowing arc-extinguishing graphite gap structure also includes a circuit board, which is located at the connection between the two insulating columns and is electrically connected to the graphite electrode.

[0017] To achieve the above objectives, an embodiment of the present invention provides a self-blowing arc-extinguishing graphite gap surge protector, which includes a box body and the above-mentioned surge protection device, wherein the surge protection device is located in the box body.

[0018] Compared with the existing technology, the self-blowing arc-extinguishing graphite gap surge protection device proposed in the present invention provides arc-extinguishing cavities on both the insulating column and the insulating ring, making them into gas channels through which gas can flow, thereby extinguishing the arc generated by the graphite electrode. The high continuous current interruption capability of the surge protection device is greatly improved, thereby optimizing the performance of the surge protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] 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.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of a self-blowing arc-extinguishing graphite gap surge protection device of the present invention;

[0021] Figure 2 for Figure 1 A schematic structural diagram of an embodiment of a graphite electrode;

[0022] Figure 3 for Figure 1 A schematic structural diagram of another embodiment of a graphite electrode;

[0023] Figure 4 for Figure 1 Schematic diagram of the structure of the middle insulating ring;

[0024] Figure 5 for Figure 1 Schematic diagram of the structure of the middle insulating column;

[0025] Figure 6 for Figure 1 Schematic diagram of the principle of self-blowing arc extinguishing;

[0026] Figure 7 The figure is a structural diagram of an embodiment of a self-blowing arc-extinguishing graphite gap surge protector of the present invention.

[0027] 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.

[0028] Description of Figure Numbers:

[0029] Label name Label name 10 Self-blowing arc-extinguishing graphite gap surge protector 11 Box 100 Self-blowing arc-extinguishing graphite gap surge protection device 110 First electrode 130 Self-blowing arc-extinguishing graphite gap structure 111 Bump electrode 131、132 Insulation column 120 Second electrode 133 Accommodation cavity 121 Second electrode body 134 Insulating ring 122 Second electrode pin 1 135 graphite electrodes 123 Second electrode pin 2 136 circuit board 1313 card slot 1311 Inlet arc quenching channel 1314 slots 1322 Air outlet arc extinguishing channel 1315 First piston rod 1341 lugs 1316 First spring 1342 through-hole 1325 Second piston rod / / 1326 Second spring DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] 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.

[0033] In order to better understand the above technical solution, the above technical solution is described in detail below with reference to the accompanying drawings.

[0034] See also Figure 1 , Figure 1 This is a structural diagram of an embodiment of a self-blowing arc-extinguishing graphite gap surge protection device of the present invention. Figure 1 As shown, the self-blowing arc-extinguishing graphite gap surge protection device 100 includes a first electrode 110 , a second electrode 120 , and a self-blowing arc-extinguishing graphite gap structure 130 located between the first electrode 110 and the second electrode 120 .

[0035] Among them, the first electrode 110 and the second electrode 120 are arranged opposite to each other and connected to the external circuit; the self-blowing arc-extinguishing graphite gap structure 130 includes two insulating columns (namely a first insulating column 131 and a second insulating column 132) arranged opposite to each other to form a accommodating cavity 133, a plurality of insulating rings 134 located in the accommodating cavity 133, and a plurality of graphite electrodes 135 located on the insulating rings 134, wherein the two insulating columns and the plurality of insulating rings are both provided with an arc-extinguishing cavity, and the arc-extinguishing cavities are connected to form a gas channel to extinguish the arc generated between the graphite electrodes 135.

[0036] The self-blowing arc-extinguishing graphite gap surge protection device 100 provided in this embodiment has arc-extinguishing cavities provided on both the insulating column and the insulating ring 134, so that they become gas channels through which gas can flow, thereby extinguishing the arc generated by the graphite electrode. The high continuous current interruption capability of the surge protection device 100 is greatly improved, thereby optimizing the performance of the surge protection device 100.

[0037] The self-blowing arc-extinguishing graphite gap structure 130 also includes a circuit board 136, which is located at the junction of the two insulating pillars and is electrically connected to the graphite electrode 135. Circuit board 136 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 135.

[0038] Specifically, the first electrode 110 and the second electrode 120 are made of a conductive metal material. The first electrode 110 is composed of a conductive metal block. In a specific embodiment, a bump electrode 111 is provided in the middle of the entire conductive metal block. The bump electrode 111 protrudes from the first electrode 110 and is made of the same material as the first electrode 110. The conductive electrode 111 and the first electrode 110 can be integrally formed or manufactured separately, depending on actual needs to ensure that the conductive electrode 111 is connected to the first electrode 110. Since both the first electrode 110 and the conductive electrode 111 are composed of metal blocks, the contact area is large and the conductive stability is good.

[0039] In this embodiment, the second electrode 120 includes a second electrode body 121, a second electrode pin 122, and a second electrode pin 2 123. The second electrode pin 122 and the second electrode pin 2 123 are both connected to the second electrode body 121. The second electrode body 121 is composed of a conductive metal block, and the second electrode pin 122 and the second electrode pin 2 123 are composed of a conductive metal strip. The second electrode body 121, the second electrode pin 122, and the second electrode pin 2 123 can be integrally formed or separately manufactured according to actual needs so that the second electrode pin 122 and the second electrode pin 2 123 are connected to the second electrode body 121. In this embodiment, integral molding is preferred and has good stability. In other embodiments, the number of pins of the second electrode can be single or multiple, based on the actual number of requirements for contacting the peripheral circuit, and is not limited here.

[0040] Please also refer to Figure 2 、 Figure 3 and Figure 4 , multiple graphite electrodes 135 are spaced apart from multiple insulating rings 134, adjacent graphite electrodes 135 are located on both sides of the same insulating ring 134, and there are gaps between adjacent graphite electrodes 135; wherein, the number of graphite electrodes 135 is equal to the number of insulating rings 134 plus one, that is, when the number of insulating rings 134 is 8, the number of graphite electrodes 135 is 9.

[0041] In order to create a gap when the two graphite electrodes 135 and the insulating ring 134 are in contact, the gap distance is set to a, and the two sides of the graphite electrode 135 are designed in a stepped manner. Specifically, the graphite electrode 135 includes an integrally formed graphite electrode body and graphite electrode side bodies located on both sides of the graphite electrode body, wherein the diameter of the graphite electrode body is larger than the diameter of the graphite electrode side body, the diameter of the graphite electrode side body is slightly smaller than the inner diameter of the insulating ring 134, and the diameter of the graphite electrode body is not larger than the outer diameter of the insulating ring 134. Assuming the thickness of the graphite electrode side body is d, the thickness of the insulating ring 134 is the sum of the thickness of the two graphite electrode side bodies plus the gap distance, that is, the thickness H of the insulating ring 134 is equal to 2d+a, a is the gap distance, and the range of a is 1-5 mm. Among them, the graphite electrode side body can also be provided with a chamfered or rounded corner design to facilitate the processing and production of the graphite electrode, such as Figure 3 shown.

[0042] In other embodiments, the graphite electrode 135 is circular in shape, and an isolation ridge is provided in the middle of the insulating ring 134 to isolate adjacent graphite electrodes 135 . The width of the isolation ridge is set according to the gap distance.

[0043] In this embodiment, the graphite electrodes 135 are circular in shape, and the corresponding insulating rings 134 are also circular in shape. In other embodiments, the graphite electrodes 135 may be rectangular or elliptical, and the corresponding insulating rings 134 may be rectangular or elliptical, respectively, to isolate adjacent graphite electrodes 135. In this embodiment, the thickness of each graphite electrode 135 may be equal or unequal.

[0044] like Figure 4 As shown, opposing lugs 1341 are provided on either side of the insulating ring 134. Each lug 1341 has a through-hole 1342. The gap between the through-hole 1342 and the graphite electrode 135 on the insulating ring 134 forms the arc-extinguishing chamber of the insulating ring 134. The two lugs 1341 are centrally symmetrically arranged on either side of the insulating ring 134 and are configured to be inserted into the slots of the insulating pillars 123. Each lug may have multiple through-holes. In this embodiment, two through-holes are used as an example, but this is not limiting.

[0045] like Figure 5 As shown, the arc-extinguishing chambers of the two insulating columns are provided with oppositely arranged air inlet arc-extinguishing channels 1311 and air outlet arc-extinguishing channels 1322, as well as multiple slots 1313 for engaging multiple insulating rings 134. The slots 1313 are used to retain the lugs 1341. Each slot 1313 is provided with a slotted hole 1314 corresponding to the through hole. The slots 1314 communicate with the air inlet arc-extinguishing channels 1311 and the air outlet arc-extinguishing channels 1322, forming the arc-extinguishing chambers of the insulating columns. This embodiment is specifically described using the example of the air inlet arc-extinguishing channels 1311 being provided on the first insulating column 131 and the air outlet arc-extinguishing channels 1322 being provided on the second insulating column 132, but this is not intended to be limiting.

[0046] Specifically, each of the first insulating column 131 and the second insulating column 132 is provided with a plurality of corresponding slots 1313 for engaging the plurality of insulating rings 134. The slots 1313 are used to retain the lugs 1341. Each slot 1313 is provided with a slotted hole 1314 corresponding to the through hole 1342. The slots 1314 communicate with the inlet arc extinguishing channel 1311 and the outlet arc extinguishing channel 1322, forming an arc extinguishing cavity between the two insulating columns. The slots 1313 are located at the ends or tails of the inlet arc extinguishing channel 1311 and the outlet arc extinguishing channel 1322.

[0047] Furthermore, the outlet arc extinguishing channel 1322 is provided with a first outlet arc extinguishing channel A and a second outlet arc extinguishing channel B, and the slots 1314 of the outlet arc extinguishing channel 1322 are sequentially connected to the first outlet arc extinguishing channel A and the second outlet arc extinguishing channel B, that is, the first slot 1314 on the outlet arc extinguishing channel 1322 is connected to the first outlet arc extinguishing channel A, and the second slot 1314 on the outlet arc extinguishing channel 1322 is connected to the second outlet arc extinguishing channel B, and so on, which are not explained one by one here. The outlet arc extinguishing channel 1322 of this embodiment is provided with a first outlet arc extinguishing channel A and a second outlet arc extinguishing channel B that are staggered and separated, and the first outlet arc extinguishing channel A and the second outlet arc extinguishing channel B are respectively located on both sides of the second insulating column 132, thereby increasing the arc pulling distance and further improving the arc extinguishing ability. Similarly, in other embodiments, the inlet arc extinguishing channel 1311 can also be provided with staggered inlet arc extinguishing channels like the air arc extinguishing channel 1322.

[0048] like Figure 6 As shown, Figure 6 This is a schematic diagram of the gas flow principle of the self-blowout arc-extinguishing graphite gap surge protection device 100. Specifically, the inlet arc-extinguishing channel 1311 is equipped with a first piston column 1315 and a first spring 1316. The first piston column 1315 is located at the entrance of the inlet arc-extinguishing channel 1311. The first spring 1316 abuts the first piston column 1315 and is located inside the inlet arc-extinguishing channel 1311. The outlet arc-extinguishing channel 1322 is equipped with a second piston column 1325 and a second spring 1326. The second piston column 1325 is located at the exit of the outlet arc-extinguishing channel 1311. The second spring 1326 abuts the second piston column 1325 and is located outside the outlet arc-extinguishing channel 1322. With this arrangement, gas can only enter through the inlet arc-extinguishing channel 1311, and gas can only be discharged through the outlet arc-extinguishing channel 1322.

[0049] Specific implementation method of the self-blowing arc-extinguishing graphite gap surge protection device 100: The protection device 100 adopts a self-blowing arc-extinguishing principle. The key structure for realizing this principle is the arc-extinguishing chamber composed of the air holes on the insulating ring and the air holes on the two insulating columns (i.e., the through hole 1342 and the slot 1314). 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 1325 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 1315 opens, and cold air enters the graphite discharge gap, forming air convection. Therefore, the arc is forced to be stretched to the arc-extinguishing chamber, thereby achieving arc extinguishing.

[0050] like Figure 7As shown, the self-blowing arc-extinguishing graphite gap surge protector 10 includes a box body 11 and the above self-blowing arc-extinguishing graphite gap surge protector 100, and the self-blowing arc-extinguishing graphite gap surge protector 100 is located in the box body 11. The structure of the self-blowing arc-extinguishing graphite gap surge protector 100 is described above and will not be repeated here.

[0051] In some embodiments, the self-blowing arc-extinguishing graphite gap surge protector 10 also includes a tripping module, which is located on the outer side of the box body 11. The tripping module is welded to an electrode of the self-blowing arc-extinguishing graphite gap surge protector 100. The tripping module can adopt an existing tripping module, which is not limited here.

[0052] To sum up, it is easy for those skilled in the art to understand that the self-blowing arc-extinguishing graphite gap surge protection device proposed in the present invention provides an arc-extinguishing cavity on both the insulating column and the insulating ring, so that they become gas channels through which gas can flow, thereby extinguishing the arc generated by the graphite electrode. The high follow-on current interruption capability of the surge protection device is greatly improved, thereby optimizing the performance of the surge protection device.

[0053] 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 self-blowing arc-extinguishing graphite gap surge protection device, characterized in that: The surge protection device comprises a first electrode, a second electrode and a self-blowing arc-extinguishing graphite gap structure located between the first electrode and the second electrode; wherein, The first electrode and the second electrode are arranged opposite to each other and connected to an external circuit; The self-blowing arc-extinguishing graphite gap structure includes 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, wherein the two insulating columns and the plurality of insulating rings are each provided with an arc-extinguishing cavity, and the arc-extinguishing cavities are connected to form a gas channel to extinguish the arc generated between the graphite electrodes; The plurality of graphite electrodes are spaced apart from the plurality of insulating rings, and adjacent graphite electrodes are located on both sides of the same insulating ring, with gaps between the graphite electrodes; wherein the number of the graphite electrodes is equal to the number of the insulating rings plus one; The insulating ring is provided with lugs arranged opposite to each other on both sides, each lug is provided with a through hole, and the gap between the through hole and the graphite electrode located on the insulating ring forms an arc extinguishing cavity of the insulating ring; The arc-extinguishing cavity of the insulating column is provided with an air inlet arc-extinguishing channel and an air outlet arc-extinguishing channel arranged opposite to each other, and a plurality of slots for engaging the plurality of insulating rings, the slots being used to clamp the lugs; each slot is provided with a slot corresponding to the through hole, the slot being connected to the air inlet arc-extinguishing channel and the air outlet arc-extinguishing channel to form the arc-extinguishing cavity of the insulating column; The gas outlet arc extinguishing channel is provided with a first gas outlet arc extinguishing channel and a second gas outlet arc extinguishing channel, and the slots of the gas outlet arc extinguishing channel are sequentially spaced and communicated with the first gas outlet arc extinguishing channel and the second gas outlet arc extinguishing channel; The air inlet arc extinguishing channel is provided with a first piston column and a first spring; wherein, the first piston column is located at the entrance of the air inlet arc extinguishing channel; the first spring abuts against the first piston column and is located in the air inlet arc extinguishing channel; The gas outlet arc extinguishing channel is provided with a second piston column and a second spring; wherein, the second piston column is located at the outlet of the gas outlet arc extinguishing channel; the second spring abuts against the first piston column and is located outside the gas outlet arc extinguishing channel. 2 . The surge protection device according to claim 1 , wherein two sides of the graphite electrode are designed in a stepped manner. 3 . The surge protection device according to claim 1 , wherein the self-blowing arc-extinguishing graphite gap structure further comprises a circuit board, wherein the circuit board is located at the connection between the two insulating pillars and is electrically connected to the graphite electrode.

4. A self-blowing arc-extinguishing graphite gap surge protector, characterized in that: The surge protector comprises a box body and the surge protection device according to any one of claims 1 to 3, wherein the surge protection device is located in the box body.

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