A watertight connector with gas overpressure protection structure

Abstract

A watertight connector with a gas overpressure protection structure includes a plug and a socket, wherein a central gas path is provided in the plug, and a socket gas pipe is provided on the socket, and the two ends of the central gas path are respectively connected to the cable gas pipe and the socket gas pipe; the gas overpressure protection structure includes a first one-way sealing component, a second one-way sealing component and a pressure relief channel; the first one-way sealing component and the second one-way sealing component have the same structure, including a core shaft and two one-way sealing rings, and the two one-way sealing rings are located on both sides of the baffle ring on the core shaft; the cross section of the one-way sealing ring is U-shaped, and a U-shaped spring is installed in its U-shaped groove; one side of the U-shaped notch on the one-way sealing ring is the front of the sealing ring, and the other side opposite is the back of the sealing ring, and the gas flow direction allowed by the one-way sealing ring is from the back of the sealing ring to the front of the sealing ring; the first one-way sealing component and the second one-way sealing component are respectively arranged on the plug and the socket. The present invention can discharge the gas leaked in the connector through the gas overpressure protection structure.

Description

Technical Field

[0001] The invention belongs to the field of watertight connectors, and in particular relates to a watertight connector with a gas overpressure protection structure. Background Art

[0002] When high-pressure gas is applied to underwater electrical equipment, it is necessary to continuously supply gas to the underwater equipment while transmitting electrical signals. How to prevent the impact of gas accidentally entering the cable when transmitting from the surface gas source to the underwater equipment? The common method is to transmit gas and electrical signals separately. To transmit gas and electrical signals separately, it is necessary to lay cables for transmitting electrical signals and gas pipes for transmitting gas from the shore to the underwater equipment, which is complex in structure and high in cost.

[0003] In order to solve the problems existing in the above-mentioned prior art, a solution has emerged to transmit gas and electrical signals together. For example, the gas-electric composite cable with publication number CN221551539U can realize gas-electricity integrated transmission. The wiring tube of the gas-electric composite cable has a gas transmission pipe and a cable tube, and the cable tube contains a cable line. However, when the gas-electric composite cable is used to connect a watertight connector underwater, the high pressure generated by gas leakage may have an adverse effect on the cable line in the gas-electric composite cable and the sealing structure of the connector, and the good sealing of the watertight connector will aggravate this adverse effect. Therefore, it is necessary to set corresponding overvoltage protection when using the gas-electric composite cable to eliminate the existing safety hazards. Summary of the invention

[0004] The object of the present invention is to provide a watertight connector with a gas overpressure protection structure. By arranging corresponding one-way sealing components and matching pressure relief channels at positions where gas leakage is likely to occur in the connector, the leaked gas can be discharged from the connector while ensuring the watertightness of the connector, thereby avoiding safety hazards caused by gas leakage.

[0005] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a watertight connector with a gas overpressure protection structure, comprising a plug and a socket that match each other, wherein a central gas circuit is arranged in the plug, and a socket gas pipe is arranged on the socket, and the two ends of the central gas circuit are respectively connected with the cable gas pipe of the gas-electric composite cable and the socket gas pipe;

[0006] The gas overpressure protection structure comprises a first one-way sealing component, a second one-way sealing component and a pressure relief channel; the first one-way sealing component and the second one-way sealing component have the same structure, including a core shaft and two one-way sealing rings sleeved on the core shaft, and the two one-way sealing rings are located on both sides of the baffle ring on the core shaft; the cross section of the one-way sealing ring is U-shaped, and a U-shaped spring is installed in its U-shaped groove; one side of the U-shaped groove on the one-way sealing ring is the front side of the sealing ring, and the other side opposite to it is the back side of the sealing ring, and the one-way sealing ring allows the gas to flow from the back side of the sealing ring to the front side of the sealing ring;

[0007] There are two gas leakage points in the watertight connector, namely, the leakage point at the crimping joint where the central gas circuit and the cable gas pipe are connected, and the leakage point at the plug-in surface where the central gas circuit and the socket gas pipe are connected;

[0008] The first one-way sealing component is arranged on the plug, and the U-shaped notch of the one-way sealing ring of the first one-way sealing component is away from the leakage point at the crimping; one end of the core shaft of the first one-way sealing component is connected to the through hole on the plug that can communicate with the inner cavity of the plug, and the other end of the core shaft is connected to the air inlet of the pressure relief channel arranged on the plug, and the exhaust port of the pressure relief channel is connected to the through hole on the outer diameter surface of the plug end of the plug;

[0009] The second one-way sealing component is arranged on the socket, and the U-shaped groove portion of the one-way sealing ring of the second one-way sealing component is away from the leakage point of the plugging surface; after the socket and the plug are plugged into each other, one end of the core shaft of the second one-way sealing component is connected to the exhaust port of the pressure relief channel, and the other end is connected to the cover plate on the outer diameter surface of the socket.

[0010] Its beneficial effects are: according to the two gas leakage points in the connector, the present invention designs a second one-way sealing component on the socket side, and this structure can directly eliminate the gas leakage generated by the central gas path when the plug and socket are plugged in to the outside of the connector; a first one-way sealing component is designed inside the plug, and this structure can eliminate the gas leakage at the connection between the cable gas pipe and the central gas path to the plug-in area of ​​the plug and socket. When the gas pressure in the plug-in area increases, the gas is exhausted to the outside of the connector through the second one-way sealing component on the socket side, thereby realizing the protection of the gas-electric composite cable and the gas-electric composite connector, and eliminating the risk of damage due to high gas pressure.

[0011] As an embodiment, a first seal installation groove is provided on the plug, the bottom opening of the first seal installation groove is connected to the inner cavity of the plug, and the notch of the first seal installation groove is connected to the pressure relief channel; the first one-way sealing assembly is installed in the first seal installation groove.

[0012] The beneficial effects are as follows: the first sealing component installation groove provides a reliable installation position for the first one-way sealing component, and facilitates the outflow of gas in the inner cavity of the plug, thereby reducing the pressure in the inner cavity of the plug.

[0013] As an embodiment, a second seal installation groove is provided on the socket, the bottom opening of the second seal installation groove is connected to the interior of the socket, the notch opening of the second seal installation groove is on the outer diameter surface of the socket, the cover plate is used to seal the notch opening of the second seal installation groove, and the second one-way seal assembly is installed in the second seal installation groove.

[0014] The beneficial effect is that the second sealing component installation groove provides a reliable installation position for the second one-way sealing component, so that during the plug-in process of the plug and socket, the gas leaking from the plug surface leakage point can be discharged from the connector in time.

[0015] Furthermore, the plug-in end of the plug is provided with a plug insulating member, and the end surface of the plug insulating member is in close contact with the end surface of the plug-in end of the socket.

[0016] The beneficial effect is that the provision of the plug insulating member can protect the transmission of electrical signals and improve the safety of the connector.

[0017] Furthermore, the pressure relief channel is arranged on the plug insulating member.

[0018] The beneficial effect is that another method is provided for setting the pressure relief channel, which is convenient for customers to choose according to their needs.

[0019] Furthermore, the pressure relief channel on the plug insulation includes an axial through hole section and a radial extension section. The axial through hole section passes through the plug insulation, and the radial extension section is located on the outer end surface of the plug insulation and radially extends to communicate with the through hole on the outer diameter surface of the plug end.

[0020] The beneficial effect is that the radial extension section can be used as a channel for gas to flow out through the second one-way sealing component, and can also be used as a channel for gas to flow out of the connector through the first one-way sealing component, which can simplify the design of the pressure relief channel of the connector.

[0021] Furthermore, an electrical jack is provided on the plug insulating member, one end of which is connected to a plug electrical pin, and the other end of which is used to connect to a socket electrical pin on a socket; the plug electrical pin is used to electrically connect to the cable line of the gas-electric composite cable.

[0022] The beneficial effect is that the setting of the electrical socket can conduct the electrical pins of the plug and the electrical pins of the socket, thereby ensuring reliable transmission of electrical signals.

[0023] Furthermore, a coaxially arranged inner tube and outer tube are provided at the tail of the central gas circuit, and a plurality of elastic convex rings are also provided on the outer wall of the inner tube and the inner wall of the outer tube; the cable gas transmission pipe of the gas-electric composite cable is inserted between the inner tube and the outer tube, and a seal is formed by squeezing the elastic convex ring.

[0024] The beneficial effects are as follows: the arrangement of the inner tube and the outer tube facilitates the rapid connection between the central gas path and the cable gas transmission pipe, and the design of the elastic convex ring can seal the connection position.

[0025] Furthermore, a threading hole is provided at the rear of the plug, the gas-electric composite cable is passed through the threading hole, a vulcanized layer is coated between the portion of the gas-electric composite cable located outside the plug and the plug, and a stuffing box is also provided in the threading hole.

[0026] The beneficial effect is that the arrangement of the stuffing box and the vulcanized layer can form a reliable seal on the joint between the gas-electric composite cable and the plug tail from the inside and the outside, thereby ensuring the water tightness of the connector.

[0027] Furthermore, a first sealing ring is arranged between the central air path and the inner wall of the plug, a second sealing ring is arranged between the outer diameter surface of the plug and the inner wall of the socket, a third sealing ring is arranged between the socket air pipe and the socket shell, a fourth sealing ring is arranged between the socket air pipe and the central air path, and a fifth sealing ring and a sixth sealing ring are respectively arranged on the outer diameter surface and the end surface of the mounting end of the socket.

[0028] The beneficial effect is that the arrangement of multiple sealing rings can ensure that the connector has good water tightness.

[0029] The principle of the present invention is: after the watertight connector of the present invention is connected to the gas-electric composite cable, there are two possible leakage points in the product structure design, one is the sealing part of the central gas path when the plug and socket are plugged in, and the other is the connection between the cable gas pipe and the central gas path. In order to avoid the impact on the equipment when there is gas leakage in these two places, a second one-way sealing component is designed on one side of the socket, and this structure can directly exclude the gas leakage generated by the central gas path when the plug and socket are plugged in to the outside of the connector; a first one-way sealing component is designed inside the plug, and this structure can exclude the gas leakage at the connection between the cable gas pipe and the central gas path to the plug-in area of ​​the plug and socket. When the gas pressure in the plug-in area increases, the gas is excluded to the outside of the connector through the second one-way sealing component on the socket side, thereby protecting the gas-electric composite cable and the gas-electric composite connector and eliminating the risk of damage caused by high air pressure. At the same time, due to the use of a one-way sealing ring, the watertightness of the connector can be guaranteed on the gas pressure relief path to prevent external water from entering the connector.

[0030] The beneficial effects of the present invention are as follows: according to the gas leakage points that are prone to occur in the product, the present invention sets a one-way sealing assembly composed of a one-way sealing ring and a core shaft, which together with the designed pressure relief channel form a gas overpressure protection structure, effectively solving the adverse effects that gas leakage in the connector may have on the circuit, and realizing safe and reliable composite transmission of high-pressure gas and electrical signals on the watertight connector. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a watertight connector with a gas overpressure protection structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the sealing principle of the one-way sealing assembly of the present invention;

[0033] Figure 3 It is a schematic diagram of the structure of the plug in the present invention;

[0034] Figure 4 It is a schematic diagram of the structure of the socket in the present invention;

[0035] Markings in the figure: 100, plug, 101, central air path, 101-1, inner tube, 101-2, outer tube, 101-3, elastic convex ring, 102, plug electrical pin, 103, plug insulating member, 104, electrical socket, 105, leakage point at crimping, 106, first one-way sealing component, 107, pressure relief channel, 108, leakage point on the plug surface, 109, stuffing box, 110, vulcanized layer, 111, locking nut, 112, first sealing ring, 113, second sealing ring, 114, first sealing member mounting groove, 115, plug inner cavity;

[0036] 200, socket, 201, socket electrical pin, 202, socket gas pipe, 203, second one-way sealing assembly, 204, cover plate, 205, third sealing ring, 206, fourth sealing ring, 207, socket mounting end, 208, fifth sealing ring, 209, sixth sealing ring, 210, second sealing member mounting groove;

[0037] 300, gas-electric composite cable, 301, cable gas transmission pipe, 302, cable line;

[0038] 400, one-way sealing assembly, 401, core shaft, 401-1, spacer ring, 402, one-way sealing ring, 403, U-shaped spring, 404, sealing lip, 405, front side of sealing ring, 406, back side of sealing ring;

[0039] 501, a first structure, 502, a second structure, 503, a fluid channel. DETAILED DESCRIPTION

[0040] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the invention in any way.

[0041] See attached Figure 1As shown, a watertight connector with a gas overpressure protection structure described in the present invention includes a plug 100, a socket 200 and a gas overpressure protection structure, a gas-electric composite cable 300 is passed through the threading hole at the rear end of the plug 100 and fixed, a cable gas pipe 301 in the gas-electric composite cable 300 is connected with the central gas path 101 in the plug 100, and a cable line 302 of the gas-electric composite cable 300 is welded and fixed with the plug electrical pin 102 in the plug 100. After the socket 200 and the plug 100 are plugged in, the socket gas pipe 202 on the socket 200 is connected with the central gas path 101 in the plug 100, and the socket electrical pin 201 in the socket 200 is inserted into the electrical jack 104 in the plug 100 to achieve conduction with the plug electrical pin 102. The gas overpressure protection structure includes a one-way sealing assembly 400 and a corresponding pressure relief channel 107.

[0042] Before describing the structures of the plug 100 and the socket 200, Figure 2 The structure of the one-way sealing assembly 400 and its sealing principle are introduced in detail.

[0043] like Figure 2 As shown, the one-way sealing assembly 400 includes a core shaft 401 and a one-way sealing ring 402 installed on the core shaft 401. A spacer ring 401-1 is provided in the middle of the core shaft 401, and a one-way sealing ring 402 is sleeved on both sides of the spacer ring 401-1. The one-way sealing ring 402 includes a sealing body with a U-shaped cross section and a U-shaped spring 403 installed in the U-shaped groove of the sealing body. The two opposite sides of the sealing body are two sealing lips 404, and the tension of the U-shaped spring 403 stretches the two sealing lips 404 apart. The end faces of the two ends of the shaft body on the core shaft 401 for sleeved with the one-way sealing ring 402 are chamfered. On the one-way sealing ring 402, one end of the U-shaped groove opening is the front face 405 of the sealing ring, and the other opposite end is the back face 406 of the sealing ring.

[0044] When the one-way sealing assembly 400 is installed in a cavity surrounded by the first structure 501 and the second structure 502, the two sealing lips 404 of the one-way sealing ring 402 are squeezed between the core shaft 401 and the inner wall of the cavity, and fluid channels 503 are respectively arranged at both ends of the first structure 501 and the second structure 502 to connect the cavities. The front sides 405 of the two one-way sealing rings 402 face the fluid channel 503 on the second structure 502, and the back sides 406 of the sealing rings face the fluid channel 503 on the first structure 501. When the fluid passes through the fluid channel 503 on the second structure 502, a front fluid pressure F1 is generated that acts on the front face 405 of the sealing ring adjacent to the one-way sealing ring 402. The front fluid pressure F1 and the tension of the U-shaped spring 403 are in the same direction, so that the sealing lip 404 fits more tightly with the inner wall of the cavity, thereby preventing the fluid from passing through the sealing ring. The greater the front fluid pressure F1, the better the sealing effect. When the fluid passes through the fluid channel 503 on the first structure 501, a back fluid pressure F2 is generated that acts on the back face 406 of the sealing ring adjacent to the one-way sealing ring 402. The back fluid pressure F2 and the tension of the U-shaped spring 403 are in opposite directions. When the back fluid pressure F2 can overcome the tension of the U-shaped spring 403, it can pass through the gap between the sealing lip 404 and the inner wall of the cavity.

[0045] Therefore, the one-way sealing component 400 is reasonably arranged in the watertight connector. When high-pressure gas leaks in the watertight connector, the gas can be guided to flow to the outside of the connector to release pressure, thereby protecting the gas-electric composite cable in the connector; at the same time, external water will not enter the connector through the one-way sealing component 400. Therefore, it can play a safe and reliable role in gas overpressure protection, ensuring that the watertight connector can work reliably underwater.

[0046] Combine the following Figure 1 , 3 4 further describes the specific structure of the watertight connector and the arrangement of the one-way sealing assembly 400 and the pressure relief channel 107.

[0047] When the one-way sealing assembly 400 is applied to a watertight connector, it is respectively arranged on the plug 100 and the socket 200 of the watertight connector. The one-way sealing assembly 400 located on the plug 100 is the first one-way sealing assembly 106, and the one-way sealing assembly 400 located on the socket 200 is the second one-way sealing assembly 203.

[0048] The plug 100 includes a plug shell, the front end of which is a plug-in end for plugging and connecting with the socket 200, the rear end of which is a wiring end and is provided with a threading hole for passing the gas-electric composite cable 300, and the gas-electric composite cable 300 is connected with the corresponding gas circuit and circuit inside the plug shell to realize gas-electric composite transmission.

[0049] like Figure 3 As shown, a central gas path 101 is provided at the central axis of the plug 100, and the central gas path 101 extends from the plug-in end of the plug 100 to the inside of the plug 100, and a first sealing ring 112 is provided between the outer peripheral surface of the central gas path 101 and the inner wall of the plug shell, and the input end of the central gas path 101 is used for docking with the socket gas pipe 202 on the socket 200, and the output end of the central gas path 101 is used for docking with the cable gas pipe 301 in the gas-electric composite cable 300. Preferably, the output end of the central gas path 101 is configured as a double-layer tube, including a coaxially arranged inner tube 101-1 and an outer tube 101-2, the tube body of the cable gas pipe 301 is accommodated between the inner tube 101-1 and the outer tube 101-2, the inner tube 101-1 is used for gas circulation, the outer wall of the inner tube 101-1 and the inner wall of the outer tube 101-2 are both provided with a plurality of elastic convex rings 101-3 distributed along the axial direction, after the cable gas pipe 301 is inserted between the inner tube 101-1 and the outer tube 101-2, the elastic convex ring 101-3 is squeezed by the inner and outer tube walls of the cable gas pipe 301 to form a crimping seal. The plug-end face of the plug 100 is provided with a plug insulator 103 around the central gas path 101, and a plurality of axial through holes are provided in the plug insulator 103 along the circumference, and an electric plug hole 104 capable of conducting electricity is installed in the axial through hole, and the electric plug hole 104 is plugged with the plug electric plug pin 102 in the plug 100, and the tail of the plug electric plug pin 102 is used for welding with the cable 302 in the gas-electric composite cable 300. A stuffing box 109 is provided in the threading hole of the connection end of the plug 100, which is used to form an internal seal with the gas-electric composite cable 300 when the gas-electric composite cable 300 passes through the threading hole. After the gas-electric composite cable 300 passes through the connection end of the plug 100, a vulcanized layer 110 is also coated between the gas-electric composite cable 300 and the plug 100, which not only fixes the gas-electric composite cable, but also forms a seal on the outside of the connection between the gas-electric composite cable 300 and the plug 100.

[0050] Further, such as Figure 1 As shown, the position where the gas-electric composite cable 300 and the central gas circuit 101 are connected is prone to form a leakage point 105 at the crimping of the watertight connector. Therefore, a first one-way sealing component 106 is also provided between the output end of the central gas circuit 101 and the plug end of the plug 100, and a pressure relief channel 107 is provided on the plug insulating part 103, and the pressure relief channel 107 extends axially and passes through the plug insulating part 103.

[0051] like Figure 3As shown, the housing of the plug 100 is provided with a first seal installation groove 114, the bottom opening of the first seal installation groove 114 is connected to the plug inner cavity 115, the notch of the first seal installation groove 114 is in contact with the inner end surface of the plug insulating member 103, the first one-way seal assembly 106 is installed in the first seal installation groove 114, the U-shaped notch of the one-way seal ring 402 faces the plug end of the plug 100, and the two ends of the core shaft 401 of the first one-way seal assembly 106 are respectively stuck in the groove around the bottom opening of the first seal installation groove 114 and the groove around the mouth of the pressure relief channel 107. In this structure, the plug housing structure where the first seal installation groove 114 is located is equivalent to Figure 2 The first structure 501 in the plug insulator 103 is equivalent to Figure 2 In the second structure 502, according to the sealing principle of the one-way sealing assembly 400, when high-pressure gas leaks at the position where the gas-electric composite cable 300 and the central gas path 101 are connected, the gas diffuses to the plug cavity 115, and the gas pressure acts on the back of the one-way sealing ring 402 through the opening at the bottom of the first sealing component installation groove 114. As the air pressure increases, the gas overcomes the tension of the U-shaped spring 403, passes through the gap between the sealing lip 404 and the inner wall of the first sealing component installation groove 114, and enters the pressure relief channel 107, thereby reducing the air pressure in the plug cavity 115 and protecting the gas-electric composite cable 300 therein.

[0052] Furthermore, the pressure relief channel 107 extends radially after reaching the outer end surface of the plug insulating member 103 , and communicates with a through hole provided on the side surface of the plug end housing of the plug 100 .

[0053] The plug-in end side of the plug 100 is provided with a second sealing ring 113 for extruding and contacting with the housing of the socket 200 to form a seal. The plug-in end side of the plug 100 is also provided with a locking nut 111 for locking the socket 200 after the plug 100 and the socket 200 are inserted into place, and further extruding the second sealing ring 113 to ensure the sealing effect.

[0054] The specific structure of the socket 200 can be referred to Figure 4As shown, a socket gas pipe 202 is provided at the center of the socket 200, and the output end of the socket gas pipe 202 is used to connect with the central gas path 101 in the plug 100. A third sealing ring 205 and a fourth sealing ring 206 are provided on the socket gas pipe 202, and the third sealing ring 205 is used to seal the socket gas pipe 202 and the inner wall of the socket 200, and the fourth sealing ring 206 is used to seal the socket gas pipe 202 and the central gas path 101. A plurality of socket electrical pins 201 are provided around the socket gas pipe 202, and the socket electrical pins 201 are used to be plugged into the electrical socket 104 in the plug 100, and after being plugged in, conduction with the socket electrical pins 102 is achieved through the electrical socket 104. One end of the socket 200 is a socket plug-in end, and the other end is a socket mounting end 207, and the socket plug-in end is used to be plugged into the plug 100, and the socket mounting end 207 is used to be connected to a corresponding device. The socket mounting end 207 is provided with a fifth sealing ring 208 and a sixth sealing ring 209 . The fifth sealing ring 208 is a radial sealing ring provided on the outer diameter surface of the socket mounting end 207 , and the sixth sealing ring 209 is an axial sealing ring provided on the end surface of the socket mounting end 207 .

[0055] Further, such as Figure 1 As shown, during the plug-in process of the plug 100 and the socket 200, a plug-in surface leakage point 108 is formed between the socket gas pipe 202 and the central gas path 101 of the plug 100. The gas leaked during the plug-in process leaks out from the plug-in surface leakage point 108. If the leaked gas is not discharged, it is difficult to achieve the plug-in of the head seat, which affects the water tightness of the connector after the plug-in. For this reason, a second one-way sealing component 203 is also provided on the socket 200 to discharge the gas leaked at the plug-in surface leakage point 108 out of the connector.

[0056] The configuration of the second one-way sealing component 203 can refer to Figure 4 As shown, a second seal installation groove 210 is provided on the side of the shell of the socket 200, the bottom of the second seal installation groove 210 is open and communicated with the inside of the socket 200, the notch of the second seal installation groove 210 is open to the outer diameter surface of the socket 200, and the second seal installation groove 210 is closed by a cover plate 204. The cover plate 204 is connected to the socket 200 by screws. The second one-way sealing assembly 203 is installed in the second seal installation groove 210, wherein the U-shaped notch portion of the one-way sealing ring 402 faces the outer diameter surface of the socket 200, one end of the core shaft 401 is in contact with the bottom opening of the second seal installation groove 210, and the other end is located in the groove on the inner side of the cover plate 204. In this structure, the shell of the socket 200 is equivalent to Figure 2 The first structure 501 shown, the cover plate 204 is equivalent to Figure 2The second structure 502 is shown. During the plug-in process of the header, when gas leakage occurs at the plug-in surface leakage point 108, the gas diffuses to the plug-in area between the plug 100 and the socket 200, and the gas pressure acts on the back of the one-way sealing ring 402 through the bottom opening of the second seal installation groove 210. As the gas pressure increases, the gas pressure overcomes the tension of the U-shaped spring 403, passes through the gap between the sealing lip 404 and the inner wall of the second seal installation groove 210, and then flows out of the connector through the gap between the cover plate 204 and the outer diameter surface of the socket 200.

[0057] Furthermore, after the plug 100 and the socket 200 are plugged into each other, the radially extending portion of the pressure relief channel 107 on the end face of the plug insulator 103 is connected to the bottom opening of the second seal mounting groove 210, so that the gas leaked from the leakage point 105 at the crimping joint passes through the first one-way sealing component 106, and then through the pressure relief channel 107, and is further discharged from the connector by the second one-way sealing component 203.

[0058] The first sealing ring 112 , the second sealing ring 113 , the third sealing ring 205 , the fourth sealing ring 206 , the fifth sealing ring 208 and the sixth sealing ring 209 are all O-type sealing rings.

[0059] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit the same. Those skilled in the art should understand that the specific implementation modes of the present invention may be modified or replaced by equivalents with reference to the above embodiments. Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention are within the scope of protection of the pending claims.

Claims

1. A watertight connector with a gas overpressure protection structure, comprising a plug (100) and a socket (200) that are compatible with each other, characterized in that: The plug (100) is provided with a central gas circuit (101), the socket (200) is provided with a socket gas supply pipe (202), and two ends of the central gas circuit (101) are respectively connected to the cable gas supply pipe (301) of the gas-electric composite cable (300) and the socket gas supply pipe (202); The gas overpressure protection structure comprises a first one-way sealing component (106), a second one-way sealing component (203) and a pressure relief channel (107); the first one-way sealing component (106) and the second one-way sealing component (203) have the same structure, comprising a core shaft (401) and two one-way sealing rings (402) sleeved on the core shaft (401), the two one-way sealing rings (402) being located on both sides of a spacer ring (401-1) on the core shaft (401); the cross section of the one-way sealing ring (402) is U-shaped, and a U-shaped spring (403) is installed in the U-shaped groove; one side of the U-shaped groove on the one-way sealing ring (402) is the front side of the sealing ring (405), and the other side opposite to the one-way sealing ring is the back side of the sealing ring (406), and the gas flow direction allowed by the one-way sealing ring (402) is from the back side of the sealing ring (406) to the front side of the sealing ring (405); There are two gas leakage points in the watertight connector, namely a leakage point (105) at the crimping joint where the central gas path (101) and the cable gas pipe (301) are connected, and a leakage point (108) at the mating surface where the central gas path (101) and the socket gas pipe (202) are connected. The first one-way sealing component (106) is arranged on the plug (100), and the U-shaped notch portion of the one-way sealing ring (402) of the first one-way sealing component (106) faces away from the leakage point (105) at the crimping joint; one end of the core shaft (401) of the first one-way sealing component (106) is connected to a through hole on the plug (100) that can be connected to the inner cavity (115) of the plug, and the other end of the core shaft (401) is connected to the air inlet of the pressure relief channel (107) provided on the plug (100), and the exhaust port of the pressure relief channel (107) is connected to the through hole on the outer diameter surface of the plug end of the plug; The second one-way sealing component (203) is arranged on the socket (200), and the U-shaped notch portion of the one-way sealing ring (402) of the second one-way sealing component (203) faces away from the plug surface leakage point (108); after the socket (200) and the plug (100) are plugged into each other, one end of the core shaft (401) of the second one-way sealing component (203) is connected to the exhaust port of the pressure relief channel (107), and the other end is connected to the cover plate (204) on the outer diameter surface of the socket.

2. The watertight connector according to claim 1, characterized in that: The plug (100) is provided with a first sealing member installation groove (114), the groove bottom opening of the first sealing member installation groove (114) is communicated with the plug inner cavity (115), and the notch of the first sealing member installation groove (114) is communicated with the pressure relief channel (107); the first one-way sealing assembly (106) is installed in the first sealing member installation groove (114).

3. The watertight connector according to claim 1, characterized in that: The socket (200) is provided with a second sealing member installation groove (210), the groove bottom opening of the second sealing member installation groove (210) is communicated with the interior of the socket (200), the notch opening of the second sealing member installation groove (210) is opened on the outer diameter surface of the socket (200), the cover plate (204) is used to seal the notch opening of the second sealing member installation groove (210), and the second one-way sealing assembly (203) is installed in the second sealing member installation groove (210).

4. The watertight connector according to claim 1, characterized in that: The plug-in end of the plug (100) is provided with a plug insulating member (103), and the end surface of the plug insulating member (103) is in close contact with the end surface of the plug-in end of the socket (200).

5. The watertight connector according to claim 4, characterized in that: The pressure relief channel (107) is arranged on the plug insulating component (103).

6. The watertight connector according to claim 5, characterized in that: The pressure relief channel (107) on the plug insulating member (103) comprises an axial through hole section and a radial extension section, the axial through hole section passes through the plug insulating member (103), the radial extension section is located on the outer end surface of the plug insulating member (103) and extends radially to communicate with the through hole on the outer diameter surface of the plug end.

7. The watertight connector according to claim 4, characterized in that: The plug insulating member (103) is also provided with an electrical socket (104), one end of the electrical socket (104) being connected to a plug electrical pin (102), and the other end of the electrical socket (104) being used to connect to a socket electrical pin (201) on the socket (200); the plug electrical pin (102) being used to be electrically connected to a cable line (302) of the gas-electric composite cable (300).

8. The watertight connector according to claim 1, characterized in that: The tail of the central gas path (101) is provided with a coaxially arranged inner tube (101-1) and outer tube (101-2), and the outer wall of the inner tube (101-1) and the inner wall of the outer tube (101-2) are also provided with a plurality of elastic convex rings (101-3); the cable gas transmission pipe (301) of the gas-electric composite cable (300) is inserted between the inner tube (101-1) and the outer tube (101-2), and a seal is formed by squeezing the elastic convex rings (101-3).

9. The watertight connector according to claim 1, characterized in that: A threading hole is provided at the rear of the plug (100), and the gas-electric composite cable (300) is threaded through the threading hole. A vulcanized layer (110) is coated between a portion of the gas-electric composite cable (300) located outside the plug (100) and the plug (100), and a stuffing box (109) is also provided in the threading hole.

10. The watertight connector according to claim 1, characterized in that: A first sealing ring (112) is provided between the central gas path (101) and the inner wall of the plug (100), a second sealing ring (113) is provided between the outer diameter surface of the plug and the inner wall of the socket, a third sealing ring (205) is provided between the socket gas pipe (202) and the socket shell, a fourth sealing ring (206) is provided between the socket gas pipe (202) and the central gas path (101), a fifth sealing ring (208) is provided on the outer diameter surface of the mounting end of the socket (200), and a sixth sealing ring (209) is provided on the end surface of the mounting end of the socket (200).

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