An explosion-proof socket and arc-extinguishing connector

Abstract

The application provides a flameproof socket and arc extinguishing connector. The flameproof socket is used in cooperation with a plug. The plug comprises a pin. The flameproof socket comprises a hollow shell part one. A socket base part is arranged in the shell part one. The socket base part comprises an electrical connecting part. One end of the electrical connecting part is a cable connecting section for connecting a cable. The other end of the electrical connecting part is a pin hole section for accommodating the pin. The socket base part further comprises an arc absorbing part. The arc absorbing part has an arc absorbing cavity. The arc absorbing cavity comprises a first cavity and a second cavity. The pin hole section of the electrical connecting part is installed into the first cavity. A first gap is formed between the pin hole section and the inner wall of the first cavity. The inner diameter of the second cavity is less than or equal to the diameter of the pin. When the pin is inserted into the pin hole section through the second cavity, the generated arc is left in the first gap and is absorbed by the arc absorbing part. The pin is in close contact or interference fit with the inner wall of the second cavity, so as to block the overflow of the arc from the first gap.

Description

Technical Field

[0001] This invention relates to the field of electrical connector technology, and more particularly to an explosion-proof socket and an arc-extinguishing connector. Background Technology

[0002] The description in this section provides only background information related to the disclosure of this invention and does not constitute prior art.

[0003] With the continuous development of electrical connectors, their functions are constantly being improved. The functions of electrical connectors for petroleum and chemical industries are particularly complex. Not only are the connectors and components required to meet the requirements of airtightness and watertightness, but the connectors themselves are also required to have the capabilities of foolproof, explosion-proof, electromagnetic shielding, and grounding protection. These are all key issues that need to be addressed in the existing technology.

[0004] The electrical characteristics of plugs and sockets are high current and high voltage. When plugs and sockets are mated, separated, or have poor electrical contact, arcing can easily occur. Arcing can cause explosive gases or dust inside the explosion-proof connector's internal cavity, reducing the connector's safety performance. Patents such as CN105742887A / B fail to design or apply arc-absorbing structures or related structures within the explosion-proof connector. They only achieve explosion protection through the design of the explosion-proof surface of the shell, the base, and the explosion-proof surfaces of the contacts, but do not address the potential or direct detonation sources that could cause the connector to explode.

[0005] It should be noted that the above description of the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of the present invention and facilitating understanding by those skilled in the art. It should not be assumed that the above technical solutions are known to those skilled in the art simply because they have been described in the background section of this invention. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide an explosion-proof socket and an arc-extinguishing connector, which can extinguish an electric arc generated by the electrical contacts under conditions such as high current, high voltage insertion or electrical contact, and the arc can be extinguished by itself inside the arc-extinguishing structure.

[0007] To address the aforementioned technical problems, this invention provides an explosion-proof socket for an arc-extinguishing connector, used in conjunction with a plug. The plug includes pins, and the explosion-proof socket includes a hollow outer shell. A socket base assembly is disposed within the outer shell, and the socket base assembly includes an electrical connector. One end of the electrical connector is a cable connection segment for connecting cables, and the other end is a socket hole segment for accommodating the pins. The socket base assembly also includes an arc-absorbing component with an arc-absorbing cavity comprising a first cavity and a second cavity. The socket hole segment of the electrical connector is installed into the first cavity, and a first gap exists between the socket hole segment and the inner wall of the first cavity. The inner diameter of the second cavity is less than or equal to the diameter of the pin. When the pin is inserted into the socket hole segment through the second cavity, the generated arc remains within the first gap and is absorbed by the arc-absorbing component. The pin is fitted or press-fitted against the inner wall of the second cavity to prevent the arc from escaping from the first gap.

[0008] Preferably, the arc-absorbing component includes a first arc-absorbing sleeve and a second arc-absorbing sleeve. The second arc-absorbing sleeve is provided with multiple through holes, and the first arc-absorbing sleeve is disposed in the through holes. The outer wall of the first arc-absorbing sleeve is in contact with the inner wall of the through holes. The space defined by the first arc-absorbing sleeve is the second cavity. The inner diameter of the first arc-absorbing sleeve is less than or equal to the diameter of the pin. When the pin is inserted into the insertion hole section, the pin and the first arc-absorbing sleeve are in contact or interference fit.

[0009] Preferably, the arc-absorbing cavity further includes a third cavity, and the first cavity, the second cavity and the third cavity are arranged in sequence. The inner diameter of the third cavity is larger than the diameter of the pin. The plug is inserted into the socket section through the third cavity and the second cavity in sequence. There is a second gap between the inner wall of the third cavity and the pin. When the electric arc overflows from the inner wall of the second cavity and the pin into the second gap, it can be absorbed by the arc-absorbing component.

[0010] Preferably, the socket base assembly further includes a third arc-absorbing sleeve, and the cable connection section of the electrical connector is disposed inside the third arc-absorbing sleeve, which can absorb the electric arc between the cable and the electrical connector.

[0011] Preferably, the first gap includes a first gap formed between the end face of the electrical connector and the end face of the first cavity, and a second gap formed between the side wall of the electrical connector and the side wall of the first cavity. The first gap and the second gap are connected. After the plug is inserted into the socket section, the generated electric arc passes through the first gap and enters the second gap. And / or, the electrical connector further includes a sealing section, which is located between the cable connection section and the socket section. The socket base assembly further includes a socket rubber base, which is located between the second arc-absorbing sleeve and the third arc-absorbing sleeve. The socket rubber base is installed on the outer wall of the sealing section. After the plug is inserted into the socket section, the rear end of the second gap is sealed by the socket rubber base, and the front end of the first gap is sealed by the pin and the first arc-absorbing sleeve, so that the first gap forms a sealed space.

[0012] Preferably, the outer casing includes a first socket housing and a second socket housing that can be mated and assembled with each other. The first socket housing and the second socket housing each have a first end and a second end, respectively. The first socket housing and the second socket housing are of a through-tube structure. The first end of the first socket housing is embedded in the second end of the second socket housing. The outer casing also includes a support ring located between the first socket housing and the second socket housing. The support ring is provided with a support ring spring. When the first socket housing and the second socket housing are mated, the support ring spring is pressed between the first socket housing and the second socket housing. The support ring contacts the first socket housing and the second socket housing respectively, realizing the electrical connection between the first socket housing, the support ring, and the second socket housing.

[0013] Preferably, the support ring spring is offset radially along the support ring and extends along the thread tightening direction of the first socket housing or the second socket housing. When the threads of the first socket housing and the second socket housing are tightened, the end of the support ring spring can abut against the first socket housing or the second socket housing.

[0014] Preferably, the inner surface of the second socket housing is sequentially provided with an internal thread, a relief groove, and an annular boss, and the outer surface of the first socket housing is provided with an external thread. The first socket housing and the second socket housing are connected by the external thread and the internal thread through a threaded connection. The outer shell component also includes a support ring gasket located between the first socket housing and the second socket housing. The annular boss is used to support the support ring. The support ring gasket is embedded in the relief groove. The external thread end face of the first socket housing presses against the support ring gasket to achieve a seal between the first socket housing and the second socket housing.

[0015] Preferably, the support ring has an L-shaped cross-section and includes a ring seat. The inner edge of the ring seat extends along the axial direction of the support ring to form a ring wall. The support ring spring is disposed on the ring wall, curving outwards radially relative to the ring wall and extending along the thread tightening direction of the first socket housing. Multiple support ring springs are distributed circumferentially along the support ring. The bottom of the ring seat abuts against the annular boss. A U-shaped groove is formed between the support ring and the relief groove. The support ring pad is placed in the U-shaped groove. After the first socket housing and the second socket housing are mated, the top of the ring wall of the support ring enters the inner wall of the first socket housing. The support ring spring is in elastic contact with the inside of the first socket housing. The end face of the annular boss is a conductive interface. The support ring is a conductor. The inner wall of the first socket housing is a conductive interface, realizing the electrical connection between the first socket housing, the support ring, and the second socket housing.

[0016] This application also provides an arc-extinguishing connector, including the aforementioned explosion-proof socket, and the arc-extinguishing connector further includes a plug and a filling gland used in conjunction with the explosion-proof socket.

[0017] By employing the above technical solutions, the beneficial effects of the present invention are as follows:

[0018] 1. The explosion-proof socket and arc-extinguishing connector of the present invention are provided with an arc-extinguishing structure. The connection or separation of the pin and the socket is completed in the arc-absorbing sleeve. When the pin is plugged in or separated under power, the electric arc is left in the first gap and absorbed by the arc-absorbing component. The two ends of the first gap are sealed to prevent the electric arc from overflowing.

[0019] 2. In the explosion-proof socket and arc-extinguishing connector of the present invention, the first socket housing and the second socket housing are electrically connected by a support ring. The support ring is provided with a support ring spring, which is pressed between the first socket housing and the second socket housing and contacts the first socket housing and the second socket housing respectively, ensuring the electrical connection between the first socket housing, the support ring, and the second socket housing, forming a complete metal shielding layer to shield the signal of the internal wires. At the same time, the first socket housing and the second socket housing are sealed by a support ring gasket to prevent water / oil containing impurities from entering. Attached Figure Description

[0020] Figure 1 This is a cross-sectional schematic diagram of the arc-extinguishing connector of this application.

[0021] Figure 2 This is an exploded cross-sectional view of the arc-extinguishing connector of this application.

[0022] Figure 3 This is a schematic diagram of the explosion-proof socket of this application.

[0023] Figure 4 for Figure 2 A magnified view of part A.

[0024] Figure 5 This is a schematic diagram of a partial connection structure between the first socket housing and the second socket housing of this application.

[0025] Figure 6 This is a schematic diagram of the support ring structure of this application.

[0026] Figure 7 This is a cross-sectional schematic diagram of the support ring of this application.

[0027] Figure 8 This is a schematic diagram of the structure of the first socket housing of this application.

[0028] Figure 9 This is a cross-sectional structural diagram of the first socket housing of this application.

[0029] Figure 10 This is a cross-sectional view of the socket base assembly according to the first embodiment of this application.

[0030] Figure 11 This is a cross-sectional view of the socket base assembly according to the second embodiment of this application.

[0031] Figure 12 This is a cross-sectional view of the plug base assembly of this application.

[0032] Figure 13 This is a cross-sectional view of the plug base assembly and socket base assembly of this application after they are connected.

[0033] Figure 14 This is a schematic diagram of the electrical connector of this application.

[0034] Figure 15 This is a cross-sectional schematic diagram of the electrical connector of this application.

[0035] Figure 16 This is a schematic diagram of the arc-absorbing component of this application.

[0036] Figure 17 This is a cross-sectional structural diagram of the arc-absorbing component of this application.

[0037] The components include: 1. Explosion-proof plug; 2. Explosion-proof socket; 3. Gland filler; 11. First plug housing; 12. Locking sleeve; 13. Second plug housing; 14. Plug base assembly; 141. Pin; 131. Long protruding key; 21. First socket housing; 211. Flange; 212. External thread one; 213. External thread end face; 214. Internal groove; 217. External thread II; 22. Second socket housing; 221. Internal thread; 222. Relief groove; 223. Annular boss; 23. Socket base assembly; 231. Second arc-absorbing sleeve; 231'. Arc-absorbing component; 232. Third arc-absorbing sleeve; 233. Socket rubber base; 234. Electrical connector; 235. First arc-absorbing sleeve; 2341. Cable connection section; 2342. Socket section; 2343. Grounding spring; 2344. Sealing section; 2311. Arc-absorbing cavity; 23111. First cavity; 23112. Second cavity; 23113. Third cavity; 236. First gap; 2361. Gap part one; 2362. Gap part two; 237. Second gap; 24. Support ring; 241. Support ring spring; 242. Ring seat; 243. Ring wall; 25. Support ring gasket. Detailed Implementation

[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0039] It should be noted that in the description of this invention, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0040] like Figure 1 and 2 As shown, the arc-extinguishing connector of this application includes an explosion-proof socket 2, an explosion-proof plug 1, and a stuffing box 3.

[0041] like Figure 3 , 4 As shown in Figure 5, the explosion-proof socket 2 is used in conjunction with the explosion-proof plug 1. The explosion-proof plug 1 includes a pin 141. The explosion-proof socket 2 includes an internally hollow outer shell component 1 and a socket base assembly 23 disposed in the outer shell component 1. The outer shell component 1 includes a first socket housing 21 and a second socket housing 22 that can be connected and assembled with each other. The first socket housing 21 and the second socket housing 22 respectively include a first end and a second end opposite to each other.

[0042] The first socket housing 21 and the second socket housing 22 are central tube structures. The first end of the first socket housing 21 is embedded in the second end of the second socket housing 22. The outer casing also includes a support ring 24 located between the first socket housing 21 and the second socket housing 22.

[0043] like Figure 6 and 7 The support ring 24 is provided with a support ring spring 241. When the first socket housing 21 and the second socket housing 22 are mated, the support ring spring 241 is pressed between the first socket housing 21 and the second socket housing 22. The support ring 24 contacts the first socket housing 21 and the second socket housing 22 respectively, realizing the electrical connection between the first socket housing 21, the support ring 24, and the second socket housing 22. The support ring spring 241 is offset radially along the support ring 24 and extends in the direction of thread tightening. The support ring spring 241 can be offset inward or outward relative to the ring wall 243 of the support ring 24. When the first socket housing 21 and the second socket housing 22 are threaded, the end of the support ring spring 241 can always abut against the inner wall of the first socket housing 21 or the second socket housing 22.

[0044] like Figure 8 and 9 As shown, in a preferred embodiment, the inner surface of the second end of the second socket housing 22 is sequentially provided with an internal thread 221, a relief groove 222, and an annular boss 223. The outer surface of the first socket housing 21 is provided with an external thread 212. The first socket housing 21 and the second socket housing 22 are connected by a threaded engagement between the external thread 212 and the internal thread 221. The outer casing also includes a support ring pad 25 located between the first socket housing 21 and the second socket housing 22. The annular boss 223 is used to support the support ring 24. The support ring pad 25 is embedded in the relief groove 222. The external thread end face 213 of the first socket housing 21 presses against the support ring pad 25 to achieve a seal between the first socket housing 21 and the second socket housing 22. Figure 6 and 7As shown, the cross-section of the support ring 24 is L-shaped. The support ring 24 includes a ring seat 242. The inner edge of the ring seat 242 extends along the axial direction of the support ring 24 to form a ring wall 243. The ring wall 243 of the support ring 24 has multiple L-shaped notches. The ring wall at the L-shaped notch curves outward along the radial direction of the support ring 24 to form a support ring spring piece 241. The support ring spring piece 241 extends from the root to the end along the thread tightening direction of the first socket housing 21. The bottom of the ring seat 242 abuts against the annular boss 223. A U-shaped groove is formed between the support ring 24 and the relief groove 222. The support ring pad 25 After the first socket housing 21 and the second socket housing 22 are mated within the U-shaped groove, the top of the ring wall 243 of the support ring 24 enters the inner wall of the first socket housing 21. The end of the support ring spring piece 241 always maintains elastic contact with the inner wall of the first socket housing 21. The end face of the annular boss 223 is a conductive interface, the support ring 24 is a conductor, and the inner wall of the first socket housing 21 is a conductive interface, thus realizing the electrical connection between the first socket housing 21, the support ring 24, and the second socket housing 22, forming a complete metal shielding layer to achieve signal shielding of the internal wires.

[0045] Because the support ring pad 25 is made of an elastic material, it is easily embedded in the U-shaped groove. Furthermore, since the support ring pad 25 is embedded in the relief groove 222 and is blocked by the internal thread 221 of the second socket housing 22, it is not easy for the support ring pad 25 to detach from the U-shaped groove. Additionally, due to the structural design of the support ring spring 241, the support ring 24 and the first socket housing 21 maintain a constant, elastic, and tight contact. The first socket housing 21 compresses the support ring 24, preventing poor contact.

[0046] In this embodiment, the connection between the first socket housing 21 and the second socket housing 22 is achieved through a support ring 24 as a transition bridge. The first socket housing 21 and the support ring spring 241 are in elastic contact, while the support ring 24 and the annular boss 223 of the second socket housing 22 are in rigid conductive contact. The connection method is that the first socket housing 21 and the second socket housing 22 are threadedly locked. The threaded end face of the first socket housing 21 presses against the support ring pad 25, and the support ring pad 25 presses against the support ring 24, ensuring effective contact between the support ring 24, the first socket housing 21, and the second socket housing 22.

[0047] The outer surface of the first socket housing 21 is also provided with a flange 211. When the second socket housing 22 is connected to the first socket housing 21, the top of the second socket housing 22 contacts the flange 211 of the first socket housing 21, thereby limiting the first socket housing 21 and the second socket housing 22. The flange 211 is also provided with multiple wire mounting holes for electrically connecting the arc-extinguishing connector to external equipment.

[0048] like Figure 10-17As shown, the socket base assembly 23 includes an electrical connector 234. One end of the electrical connector 234 is a cable connection segment 2341 for connecting cables, and the other end is a socket segment 2342 for accommodating the pins 141. The socket base assembly 23 also includes an arc-absorbing component 231', which has an arc-absorbing cavity 2311-, comprising a first cavity 23111 and a second cavity 23112. The socket segment 2342 of the electrical connector 234 is installed into the first cavity 23111. There is a first gap 236 between the hole segment 2342 and the inner wall of the first cavity 23111. The inner diameter of the second cavity 23112 is less than or equal to the diameter of the pin 141. When the pin 141 is inserted into the hole segment 2342 through the second cavity 23112, the generated electric arc remains in the first gap 236 and is absorbed by the arc absorbing member 231'. The pin 141 is in contact with or has an interference fit with the inner wall of the second cavity 23112 to prevent the electric arc from overflowing from the first gap 236. The arc-absorbing cavity 2311 also includes a third cavity 23113. The first cavity 23111, the second cavity 23112 and the third cavity 23113 are arranged in sequence. The inner diameter of the third cavity 23113 is larger than the diameter of the pin 141. The plug is inserted into the socket section 2342 through the third cavity 23113 and the second cavity 23112 in sequence. There is a second gap 237 between the inner wall of the third cavity 23113 and the pin 141. When the electric arc overflows from the inner wall of the second cavity 23112 and the pin 141 into the second gap 237, it can be absorbed by the arc-absorbing element 231'.

[0049] In a preferred embodiment, such as Figure 10 As shown, the arc-absorbing component 231' includes a first arc-absorbing sleeve 235 and a second arc-absorbing sleeve 231. The second arc-absorbing sleeve 231 is provided with multiple through holes. The first arc-absorbing sleeve 235 is disposed in the through holes, and the outer wall of the first arc-absorbing sleeve 235 is in contact with the inner wall of the through holes. The space defined by the first arc-absorbing sleeve 235 is a second cavity 23112. The inner diameter of the first arc-absorbing sleeve 235 is less than or equal to the diameter of the pin 141. When the pin 141 is inserted into the socket section 2342, the pin 141 and the first arc-absorbing sleeve 235 are in contact or interference fit. The socket base assembly 23 also includes a third arc-absorbing sleeve 232. The cable connection section 2341 of the electrical connector 234 is disposed in the third arc-absorbing sleeve 232. The third arc-absorbing sleeve 232 can absorb the arc between the cable and the electrical connector 234.

[0050] like Figure 13As shown, the first gap 236 includes a first gap 2361 formed between the end face of the electrical connector 234 and the end face of the first cavity 23111, and a second gap 2362 formed between the side wall of the electrical connector 234 and the side wall of the first cavity 23111. The first gap 2361 and the second gap 2362 are connected. After the plug is inserted into the socket section 2342, the generated electric arc passes through the first gap 2361 and enters the second gap 2362.

[0051] like Figure 14 and 15 As shown, the electrical connector 234 also includes a sealing section 2344, which is located between the cable connection section 2341 and the socket section 2342. The socket base assembly 23 also includes a socket rubber base 233, which is located between the second arc-absorbing sleeve 231 and the third arc-absorbing sleeve 232. The socket rubber base 233 is installed on the outer wall of the sealing section 2344. After the plug is inserted into the socket section 2342, the rear end of the second gap 2362 is sealed by the socket rubber base 233, and the front end of the first gap 2361 is sealed by the pin 141 and the first arc-absorbing sleeve 235, so that the first gap 236 forms a sealed space. The second arc-absorbing sleeve 231 includes a first end and a second end, and the first end of the second arc-absorbing sleeve 231 is in contact with the socket rubber base 233.

[0052] The socket rubber base 233, the first arc-absorbing sleeve 235, the second arc-absorbing sleeve 231, and the third arc-absorbing sleeve 232 are made of arc-resistant materials, and the arc-absorbing structure design ensures that the connector can withstand the arc erosion generated by 500 insertions and removals, effectively ensuring product safety. In a preferred embodiment, the second arc-absorbing element 231' is made of SMC material with high hardness, i.e., fiber-reinforced unsaturated polyester sheet molding compound; the first arc-absorbing element 231' is made of rubber material with elasticity, i.e., a mixture of butyl rubber and styrene-butadiene rubber.

[0053] like Figure 15 As shown, the socket base assembly 23 includes a plurality of electrical connectors 234, at least one of the plurality of electrical connectors 234 is provided with a grounding spring 2343, and the grounding spring 2343 contacts and abuts against the outer casing.

[0054] like Figure 1 , 2As shown, the explosion-proof plug 1 includes a second outer shell, within which a plug base assembly 14 is disposed. The plug base assembly 14 includes a plug. The second outer shell includes a first plug housing 11 and a second plug housing 13 that can be mated and assembled with each other. The first plug housing 11 and the second plug housing 13 each include a first end and a second end opposite to each other. The first plug housing 11 and the second plug housing 13 have a through-tube structure, with the first end of the first plug housing 11 embedded in the second end of the second plug housing 13. The second outer shell also includes a locking sleeve 12 that is fitted and limited outside the first plug housing 11 and the second plug housing 13. A mating gap is reserved between the first plug housing 11 and the locking sleeve 12. The second end of the first plug housing 11 mates with the second end of the first socket housing 21. The first plug housing 11 is fitted into the inner hole of the first socket housing 21, and the wall of the hole of the first socket housing 21 can be inserted into the mating gap between the first plug housing 11 and the locking sleeve 12. The outer wall of the first socket housing 21 is connected to the inner wall of the locking sleeve 12 by threads.

[0055] The inner wall of the second end of the first socket housing 21 is provided with an axially extending inner groove 214, and the outer wall of the first plug housing 11 is provided with an axially extending elongated key 131. The inner groove 214 and the elongated key 131 are correspondingly arranged. When the second end of the first plug housing 11 is inserted into the second end of the first socket housing 21, the elongated key 131 of the first plug housing 11 is embedded in the inner groove 214 of the first socket housing 21, which serves to guide, prevent rotation, and prevent mis-insertion of the connector contacts. At the same time, it enables blind insertion of the product without damaging the contacts.

[0056] The end face of the second end of the second arc-absorbing sleeve 231 is located inside the first socket housing 21 and is a certain distance away from the end face of the second end of the first socket housing 21. This ensures that when the explosion-proof plug 1 and the explosion-proof socket 2 are connected, the long protruding key 131 is first inserted into the inner groove 214 to complete the positioning of the first plug housing 11 and the first socket housing 21. Then, the pin 141 is inserted into the arc-absorbing cavity 2311. Finally, the pin 141 is connected to the socket to achieve blind insertion of the product without damaging the pin 141 and the socket.

[0057] like Figure 1 and 2 As shown, the connector also includes a stuffing box 3. The second socket housing and the stuffing box 3 are locked together by a threaded connection. The support sleeve of the stuffing box 3 and the cylindrical surface at the tail of the second socket housing cooperate to form an explosion-proof flame-retardant passage.

[0058] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.

Claims

1. An explosion-proof socket for an arc-extinguishing connector, used in conjunction with a plug, wherein the plug includes pins, and the explosion-proof socket includes a hollow outer shell, wherein a socket base assembly is disposed within the outer shell, and the socket base assembly includes an electrical connector, one end of which is a cable connection segment for connecting a cable, and the other end of which is a socket segment for accommodating the pins, characterized in that... The socket base assembly further includes an arc-absorbing component, which has an arc-absorbing cavity. The arc-absorbing cavity includes a first cavity and a second cavity. The plug-in segment of the electrical connector is installed into the first cavity, and a first gap exists between the plug-in segment and the inner wall of the first cavity. The inner diameter of the second cavity is less than or equal to the diameter of the pin. When the pin is inserted into the socket section through the second cavity, the generated arc remains in the first gap and is absorbed by the arc-absorbing component. The pin is fitted or press-fitted against the inner wall of the second cavity to prevent the arc from escaping from the first gap. The arc-absorbing component includes a first arc-absorbing sleeve and a second arc-absorbing sleeve. The second arc-absorbing sleeve has multiple through holes, and the first arc-absorbing sleeve is disposed within the through holes. The outer wall of the first arc-absorbing sleeve is in contact with the inner wall of the through holes. The space defined by the first arc-absorbing sleeve is the second cavity. The inner diameter of the first arc-absorbing sleeve is less than or equal to the diameter of the pin. When the pin is inserted into the insertion hole section, the pin and the first arc-absorbing sleeve are in close contact or with an interference fit. The outer casing includes a first socket housing and a second socket housing that can be mated and assembled with each other. The first socket housing and the second socket housing each include a first end and a second end that are opposite to each other. The first socket housing and the second socket housing are both centrally located tube structures. The first end of the first socket housing is embedded in the second end of the second socket housing. The outer casing also includes a support ring located between the first socket housing and the second socket housing. The support ring is provided with a support ring spring. When the first socket housing and the second socket housing are mated, the support ring spring is pressed between the first socket housing and the second socket housing. The support ring contacts the first socket housing and the second socket housing respectively, realizing the electrical connection between the first socket housing, the support ring, and the second socket housing.

2. The explosion-proof socket according to claim 1, characterized in that, The arc-absorbing cavity further includes a third cavity. The first cavity, the second cavity, and the third cavity are arranged sequentially. The inner diameter of the third cavity is larger than the diameter of the pin. The plug is inserted into the socket section through the third cavity and the second cavity in sequence. There is a second gap between the inner wall of the third cavity and the pin. When the electric arc overflows from the inner wall of the second cavity and the pin into the second gap, it can be absorbed by the arc-absorbing component.

3. The explosion-proof socket according to claim 2, characterized in that, The socket base assembly also includes a third arc-absorbing sleeve, and the cable connection section of the electrical connector is located inside the third arc-absorbing sleeve. The third arc-absorbing sleeve can absorb the electric arc between the cable and the electrical connector.

4. The explosion-proof socket according to claim 3, characterized in that, The first gap includes a gap portion one formed between the end face of the electrical connector and the end face of the first cavity, and a gap portion two formed between the side wall of the electrical connector and the side wall of the first cavity. The gap portion one and the gap portion two are connected. After the plug is inserted into the socket section, the generated electric arc passes through the gap portion one and then enters the gap portion two. And / or, the electrical connector further includes a sealing section, which is disposed between the cable connection section and the socket section. The socket base assembly further includes a socket rubber base, which is disposed between the second arc-absorbing sleeve and the third arc-absorbing sleeve. The socket rubber base is installed on the outer wall of the sealing section. After the plug is inserted into the socket section, the rear end of the second gap is sealed by the socket rubber base, and the front end of the first gap is sealed by the pin and the first arc-absorbing sleeve, so that the first gap forms a sealed space.

5. The explosion-proof socket according to claim 4, characterized in that, The support ring spring is offset radially along the support ring and extends in the direction of thread tightening of the first socket housing or the second socket housing. When the threads of the first socket housing and the second socket housing are tightened, the end of the support ring spring can abut against the first socket housing or the second socket housing.

6. The explosion-proof socket according to claim 4, characterized in that, The inner surface of the second socket housing is sequentially provided with an internal thread, a relief groove, and an annular boss. The outer surface of the first socket housing is provided with an external thread. The first socket housing and the second socket housing are connected by the external thread and the internal thread through a threaded engagement. The outer shell component also includes a support ring gasket located between the first socket housing and the second socket housing. The annular boss is used to support the support ring. The support ring gasket is embedded in the relief groove. The external thread end face of the first socket housing presses against the support ring gasket to achieve a seal between the first socket housing and the second socket housing.

7. The explosion-proof socket according to claim 6, characterized in that, The support ring has an L-shaped cross-section and includes a ring seat. The inner edge of the ring seat extends along the axial direction of the support ring to form a ring wall. The support ring spring is disposed on the ring wall, curving outwards radially relative to the ring wall and extending along the thread tightening direction of the first socket housing. Multiple support ring springs are distributed circumferentially along the support ring. The bottom of the ring seat abuts against the annular boss. A U-shaped groove is formed between the support ring and the relief groove. The support ring pad is placed in the U-shaped groove. After the first socket housing and the second socket housing are mated, the top of the ring wall of the support ring enters the inner wall of the first socket housing. The support ring spring is in elastic contact with the inside of the first socket housing. The end face of the annular boss is a conductive interface. The support ring is a conductor, and the inner wall of the first socket housing is a conductive interface, realizing the electrical connection between the first socket housing, the support ring, and the second socket housing.

8. An arc-extinguishing connector, characterized in that, The explosion-proof socket includes any one of claims 1 to 7, and the arc-extinguishing connector further includes a plug and a filling gland used in conjunction with the explosion-proof socket.

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