Independent check valve plugging connection structure

Abstract

The utility model discloses an independent check valve plugging connecting structure which comprises a first connecting piece and a second connecting piece. The first connecting piece comprises a first main body and a first valve element arranged in the first main body, and a connecting plug and a first pipeline connector are arranged at the two ends of the first main body respectively. The second connecting piece comprises a second main body and a second valve element arranged in the second main body. The two ends of the second main body are provided with a bell and spigot joint and a second pipeline connector respectively. Wherein the bell and spigot is matched with the connecting plug, when the connecting plug is inserted into the bell and spigot, the first valve element opens the flow channel in the first main body, the second valve element opens the flow channel in the second main body, and when the connecting plug is pulled out of the bell and spigot, the first valve element closes the flow channel in the first main body, and the second valve element closes the flow channel in the second main body. According to the utility model, the radiating medium in the pipeline can be prevented from overflowing or leaking to pollute the surrounding environment during plugging and unplugging.

Description

Technical Field

[0001] The utility model relates to the technical field of plug - in connectors for cooling systems, and particularly relates to an independent check valve plug - in connection structure. Background Technique

[0002] In many fields such as new energy, hydrogen energy industry batteries, motors, electronic controls, charging systems, AI servers, and cooling and cleaning water - gas path connection systems in the medical field, cooling systems are required for heat dissipation. The heat dissipation system uses fluids such as water, oil, or gas as heat dissipation media. The heat dissipation medium flows through the equipment that needs to be cooled to take away heat and achieve the heat dissipation and cooling of the equipment.

[0003] The heat dissipation system needs to be connected and plugged into the heat dissipation structure of the equipment. When connecting and unplugging, the heat dissipation medium in the pipeline will overflow or drip, thus polluting the surrounding environment. Content of the Utility Model

[0004] Aiming at the defects in the prior art, the utility model provides an independent check valve plug - in connection structure to avoid the overflow or drip of the heat dissipation medium in the pipeline during plugging and unplugging, which pollutes the surrounding environment.

[0005] The utility model provides an independent check valve plug - in connection structure, which includes a first connector and a second connector;

[0006] The first connector includes a first main body and a first valve core arranged in the first main body. Plug connectors and a first pipeline connector are respectively arranged at both ends of the first main body;

[0007] The second connector includes a second main body and a second valve core arranged in the second main body. A socket and a second pipeline connector are respectively arranged at both ends of the second main body;

[0008] Wherein, the socket is adapted to the plug connector. When the plug connector is inserted into the socket, the first valve core opens the flow channel in the first main body, and the second valve core opens the flow channel in the second main body. When the plug connector is pulled out of the socket, the first valve core closes the flow channel in the first main body, and the second valve core closes the flow channel in the second main body.

[0009] Furthermore, a first flow - through cavity connected between the plug connector and the first pipeline connector is arranged in the first main body, and a first valve port is arranged at one end of the first flow - through cavity near the plug connector;

[0010] The first valve core is provided with a flow passage hole. The first valve core is slidably fitted inside the first main body. One end of the first valve core penetrates through the socket joint, and the other end of the first valve core penetrates into the first flow passage cavity and is provided with a first valve head capable of blocking or opening the first valve port. One end of the side wall of the first valve core close to the first valve head is provided with a first water outlet window. A first spring is arranged in the first flow passage cavity and supported between the first valve head and one end of the first flow passage cavity close to the first pipeline joint.

[0011] A second flow passage cavity connected between the socket and the second pipeline joint is arranged inside the second main body. A second valve port is arranged at one end of the second flow passage cavity close to the socket. An annular platform is arranged on one side of the second valve port close to the socket.

[0012] The second valve core is provided with a flow passage hole. The second valve core is slidably fitted inside the second main body. One end of the second valve core is provided with an outer convex ring adapted to be inside the socket. The other end of the second valve core penetrates into the second flow passage cavity and is provided with a second valve head capable of blocking or opening the second valve port. One end of the side wall of the second valve core close to the second valve head is provided with a second water outlet window. A second spring is arranged outside the second valve core and supported between the annular platform and the outer convex ring.

[0013] Further, the first main body includes a first structural member and a second structural member. The socket joint and the first flow passage cavity are respectively arranged at both ends of the first structural member. First internal threads are arranged inside the first structural member at one end of the first flow passage cavity. The first pipeline joint is arranged at one end of the second structural member. First external threads connected to the first internal threads are arranged outside the other end of the second structural member.

[0014] Further, second external threads are arranged outside the first structural member at one end of the first flow passage cavity. An installation and fixing nut is connected outside the second external threads. An installation and positioning protrusion is arranged on the first structural member between the first pipeline joint and the second external threads.

[0015] Further, third external threads are arranged outside the second structural member at one end of the first pipeline joint, and a pagoda interface is arranged at its side end. A nut locking sleeve is connected outside the third external threads. A pressing convex ring for pressing the connecting pipeline sleeved outside the pagoda interface against the conical surface of the pagoda interface is arranged inside the end of the nut locking sleeve.

[0016] Further, the second main body includes a third structural member and a fourth structural member. The socket is arranged at one end of the third structural member. Fourth external threads are arranged at the other end of the third structural member. The second pipeline joint and the second flow passage cavity are respectively arranged at both ends of the fourth structural member. Second internal threads connected outside the fourth external threads are arranged inside the fourth structural member at the second flow passage cavity.

[0017] Further, a positioning convex ring is provided outside the plug connector. The side of the positioning convex ring facing the second connecting member is transitioned with the surface of the plug connector through a conical guiding surface. An annular recess adapted to the positioning convex ring is provided near the port inside the socket. The annular recess is transitioned with the inner surface of the socket through a conical guiding surface.

[0018] Further, a locking mechanism is further included, which is used for locking when the plug connector is inserted into the socket.

[0019] The locking mechanism includes a locking piece. A positioning sliding rail extending radially is provided on the end surface of the second main body near the socket. The locking piece is slidably installed in the positioning sliding rail. A through hole for the plug connector to pass through is provided on the locking piece. A locking groove is provided outside the plug connector. When the plug connector is inserted and mated with the socket, the locking piece can be made to snap into or out of the locking groove by sliding the locking piece.

[0020] Further, the locking mechanism further includes a pre-locking post, a third spring, and a fourth spring.

[0021] A guiding hole is axially opened on the end surface of the second main body inside the locking piece. The pre-locking post has a sliding installation portion and a pre-locking portion. The sliding installation portion is adapted to be inside the guiding hole. The third spring is supported between the bottom of the guiding hole and the sliding installation portion. The pre-locking portion extends outside the guiding hole. A positioning boss is provided between the pre-locking portion and the sliding installation portion. An annular groove is provided outside the pre-locking portion.

[0022] The locking piece is provided with a first locking port and a second locking port that are sequentially connected to the outside of the through hole along the direction of the positioning sliding rail corresponding to the position of the pre-locking post. The first locking port is wider than the second locking port. The first locking port is adapted to the pre-locking portion. The second locking port is adapted to the annular groove. The fourth spring is used to drive the locking piece to slide toward the side away from the first locking port and the second locking port.

[0023] Further, one end of the locking piece away from the first locking port and the second locking port is provided with a bent portion that bends toward the side of the second main body. A spring installation groove is provided outside the second main body corresponding to the position of the bent portion. The fourth spring is supported between the bottom of the spring installation groove and the bent portion.

[0024] The beneficial effects of the present utility model are embodied in:

[0025] In this application, a first valve core is arranged in the first connecting piece, and a second valve core is arranged in the second connecting piece. When the insertion joint of the first connecting piece is inserted into the socket of the second connecting piece, the first valve core automatically opens the flow channel in the first main body, and the second valve core automatically opens the flow channel in the second main body, thereby connecting the pipeline to meet the requirement of the flow of the heat dissipation medium. When the insertion joint of the first connecting piece is pulled out from the socket of the second connecting piece, the first valve core closes the flow channel in the first main body, and the second valve core closes the flow channel in the second main body, which can avoid the overflow of the heat dissipation medium in the pipeline or dripping and leakage during plugging and unplugging, thus preventing pollution of the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0027] Figure 1 Schematic diagram of the connection between the first connecting piece and the second connecting piece according to an embodiment of the present invention;

[0028] Figure 2 Stereogram of the first connecting piece according to an embodiment of the present invention;

[0029] Figure 3 Longitudinal sectional view of the first connecting piece according to an embodiment of the present invention;

[0030] Figure 4 Stereogram of the second connecting piece according to an embodiment of the present invention;

[0031] Figure 5 Longitudinal sectional view of the second connecting piece according to an embodiment of the present invention.

[0032] In the attached drawings, 100 - first connecting piece; 110 - first main body; 111 - socket; 1111 - positioning convex ring; 1112 - locking groove; 112 - first pipe joint; 113 - first flow - through cavity; 114 - first valve port; 115 - first structural member; 1151 - first internal thread; 1152 - second external thread; 1153 - installation positioning protrusion; 116 - second structural member; 1161 - first external thread; 1162 - third external thread; 1163 - bell - mouth interface; 117 - installation fixing nut; 118 - nut locking sleeve; 1181 - pressing convex ring; 120 - first valve core; 121 - first valve head; 122 - first water outlet window; 123 - first spring; 200 - second connecting piece; 210 - second main body; 211 - socket; 2111 - annular recess; 212 - second pipe joint; 213 - second flow - through cavity; 214 - second valve port; 2141 - annular platform; 215 - third structural member; 2151 - fourth external thread; 216 - fourth structural member; 2161 - second internal thread; 217 - positioning slide rail; 218 - guiding hole; 219 - spring installation groove; 220 - second valve core; 221 - outer convex ring; 222 - second valve head; 223 - second water outlet window; 224 - second spring; 300 - locking mechanism; 310 - locking piece; 311 - through - hole; 312 - first locking port; 313 - second locking port; 314 - bending part; 320 - pre - locking column; 321 - sliding installation part; 322 - pre - locking part; 323 - positioning boss; 324 - annular groove; 330 - third spring; 340 - fourth spring; 400 - connecting pipe; 500 - support installation plate. Detailed implementation manners

[0033] The embodiments of the technical solution of the present utility model will be described in detail below with reference to the attached drawings. The following embodiments are only used to illustrate the technical solution of the present utility model more clearly, so they are only examples and cannot be used to limit the protection scope of the present utility model.

[0034] It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meanings understood by those skilled in the art to which the present utility model belongs.

[0035] As Figures 1 - 5 shown, the embodiment of the present utility model provides an independent check valve plug - and - play connection structure, including a first connecting piece 100 and a second connecting piece 200.

[0036] The first connecting piece 100 includes a first main body 110 and a first valve core 120 arranged inside the first main body 110. The two ends of the first main body 110 are respectively provided with a socket 111 and a first pipe joint 112.

[0037] The second connecting member 200 includes a second main body 210 and a second valve core 220 disposed within the second main body 210. Socket joints 211 and second pipe connectors 212 are respectively provided at two ends of the second main body 210.

[0038] Among them, the socket joint 211 is adapted to the plug joint 111. When the plug joint 111 is inserted into the socket joint 211, the first valve core 120 opens the flow channel within the first main body 110, and the second valve core 220 opens the flow channel within the second main body 210. When the plug joint 111 is pulled out of the socket joint 211, the first valve core 120 closes the flow channel within the first main body 110, and the second valve core 220 closes the flow channel within the second main body 210.

[0039] In order to improve the sealing performance when the plug joint 111 and the socket joint 211 are plugged and matched, several sealing rings are provided between the plug joint 111 and the socket joint 211.

[0040] In this application, by providing the first valve core 120 within the first connecting member 100 and the second valve core 220 within the second connecting member 200, when the plug joint 111 of the first connecting member 100 is inserted into the socket joint 211 of the second connecting member 200, the first valve core 120 automatically opens the flow channel within the first main body 110, and the second valve core 220 automatically opens the flow channel within the second main body 210, thereby connecting the pipeline to meet the requirements for the flow of the heat dissipation medium. When the plug joint 111 of the first connecting member 100 is pulled out from the socket joint 211 of the second connecting member 200, the first valve core 120 closes the flow channel within the first main body 110, and the second valve core 220 closes the flow channel within the second main body 210. This can prevent the heat dissipation medium within the pipeline from overflowing or dripping and leaking during plugging and unplugging, thus polluting the surrounding environment.

[0041] In some embodiments, referring to Figure 2 and Figure 3 , a first flow-through cavity 113 is provided within the first main body 110 and is connected between the plug joint 111 and the first pipe connector 112. A first valve port 114 is provided at one end of the first flow-through cavity 113 close to the plug joint 111.

[0042] A flow channel hole is provided within the first valve core 120. The first valve core 120 is slidably fitted within the first main body 110. One end of the first valve core 120 passes through the plug joint 111, and the other end of the first valve core 120 penetrates into the first flow-through cavity 113 and is provided with a first valve head 121 capable of blocking or opening the first valve port 114. A first water outlet window 122 is provided at one end of the side wall of the first valve core 120 close to the first valve head 121. A first spring 123 is provided within the first flow-through cavity 113 and is supported between the first valve head 121 and the end of the first flow-through cavity 113 close to the first pipe connector 112.

[0043] Referring to Figure 4 and Figure 5, a second flow passage chamber 213 is provided inside the second main body 210 and is connected between the socket 211 and the second pipe joint 212. At one end of the second flow passage chamber 213 close to the socket 211, a second valve port 214 is provided, and an annular platform 2141 is provided on one side of the second valve port 214 close to the socket 211.

[0044] A flow passage hole is provided inside the second valve core 220. The second valve core 220 is slidably fitted inside the second main body 210. An outer convex ring 221 adapted to be inside the socket 211 is provided at one end of the second valve core 220. The other end of the second valve core 220 penetrates into the second flow passage chamber 213 and is provided with a second valve head 222 capable of blocking or opening the second valve port 214. A second water outlet window 223 is provided at one end of the side wall of the second valve core 220 close to the second valve head 222. A second spring 224 is provided outside the second valve core 220 and is supported between the annular platform 2141 and the outer convex ring 221.

[0045] When the socket 111 of the first connector 100 is inserted into the socket 211 of the second connector 200, the first valve core 120 inside the socket 111 and the second valve core 220 inside the socket 211 abut and push against each other. The first water outlet window 122 on the first valve core 120 is pushed into the first flow passage chamber 113, and the second water outlet window 223 on the second valve core 220 is pushed into the second flow passage chamber 213, thereby connecting the flow passage inside the first main body 110 to meet the requirement for the heat dissipation medium to flow through.

[0046] When the socket 111 is pulled out from the socket 211, the first spring 123 pushes the first valve core 120 to move outward, so that the first valve head 121 at the inner end of the first valve core 120 blocks at the first valve port 114, thereby closing the flow passage inside the first main body 110 to prevent the heat dissipation medium from flowing out of the first connector 100. In order to improve the sealing performance between the first valve head 121 and the first valve port 114, a sealing ring in contact with the inner wall of the first valve port 114 is provided outside the first valve head 121.

[0047] Similarly, when the socket 111 is pulled out from the socket 211, the second spring 224 pushes the second valve core 220 to move outward, so that the second valve head 222 at the inner end of the second valve core 220 blocks at the second valve port 214, thereby closing the flow passage inside the second main body 210 to prevent the heat dissipation medium from flowing out of the second connector 200. In order to improve the sealing performance between the second valve head 222 and the second valve port 214, a sealing ring in contact with the inner wall of the second valve port 214 is provided outside the second valve head 222.

[0048] In some embodiments, referring to Figure 2 and Figure 3, To facilitate the assembly of the first spool valve 120 and the first spring 123 within the first body 110, the first body 110 includes a first structural member 115 and a second structural member 116. Both the first structural member 115 and the second structural member 116 are metal parts. The plug connector 111 and the first fluid passage chamber 113 are respectively provided at both ends of the first structural member 115. Inside the first structural member 115 at one end of the first fluid passage chamber 113, a first internal thread 1151 is provided. The first pipe joint 112 is provided at one end of the second structural member 116, and a first external thread 1161 connected to the first internal thread 1151 is provided on the outside of the other end of the second structural member 116. To improve the sealing performance of the connection between the first structural member 115 and the second structural member 116, a sealing ring is provided between the connection parts of the first structural member 115 and the second structural member 116.

[0049] In some embodiments, referring to Figure 1 and Figure 2 , on the outside of the first structural member 115 at one end of the first fluid passage chamber 113, a second external thread 1152 is provided, and an installation and fixing nut 117 is connected to the outside of the second external thread 1152. An installation and positioning protrusion 1153 is provided on the first structural member 115 between the first pipe joint 112 and the second external thread 1152. In this embodiment, the first connecting member 100 can be fixedly installed on the support mounting plate 500 of the equipment port. During installation, pass the second external thread 1152 of the first structural member 115 through the hole in the support mounting plate 500 and screw on the installation and fixing nut 117 for fixation.

[0050] In some embodiments, referring to Figure 3 , on the outside of the second structural member 116 at one end of the first pipe joint 112, a third external thread 1162 is provided, and a flare fitting 1163 is provided at its side end. A nut locking sleeve 118 is connected to the outside of the third external thread 1162. On the inner side of the end of the nut locking sleeve 118, a pressing convex ring 1181 is provided to press the connecting pipe 400 sleeved outside the flare fitting 1163 against the conical surface of the flare fitting 1163. When the first pipe joint 112 is connected to the connecting pipe 400, sleeve the connecting pipe 400 outside the flare fitting 1163, and then tighten the nut locking sleeve 118, so that the pressing convex ring 1181 at the end of the nut locking sleeve 118 presses the connecting pipe 400 against the conical surface of the flare fitting 1163, which can improve the firmness of the connection between the first pipe joint 112 and the connecting pipe 400.

[0051] In some embodiments, referring to Figure 4 and Figure 5, To facilitate the assembly of the second spool valve 220 and the second spring 224 inside the second body 210, the second body 210 includes a third structural member 215 and a fourth structural member 216. A socket 211 is provided at one end of the third structural member 215, and a fourth external thread 2151 is provided at the other end of the third structural member 215. The second pipe joint 212 and the second flow-through cavity 213 are respectively provided at both ends of the fourth structural member 216. Inside the fourth structural member 216 and within the second flow-through cavity 213, there is a second internal thread 2161 connected to the outside of the fourth external thread 2151. To improve the sealing performance of the connection between the third structural member 215 and the fourth structural member 216, a sealing ring is provided between the connection parts of the third structural member 215 and the fourth structural member 216.

[0052] In some embodiments, the second pipe joint 212 preferably adopts a flare fitting. The flare fitting has a number of anti-retreat grooves on the outside, so that when the connected water pipe is sleeved outside the flare fitting, it is not easy to fall off.

[0053] In some embodiments, referring to Figure 2 and Figure 4 , there is a positioning collar 1111 provided outside the plug connector 111. The side of the positioning collar 1111 facing the second connector 200 and the surface of the plug connector 111 are transitioned through a conical guiding surface. Inside the socket 211 and near the port, there is an annular recess 2111 adapted to the positioning collar 1111. The annular recess 2111 and the inner surface of the socket 211 are transitioned through a conical guiding surface. When the first connector 100 and the second connector 200 are connected, the plug connector 111 is inserted into the socket 211, and the positioning collar 1111 outside the plug connector 111 is positioned inside the annular recess 2111 in the socket 211. This can reduce the wobbling clearance, improve the connection stability, and is beneficial to increasing the waterproof airtightness.

[0054] In some embodiments, the connection structure further includes a locking mechanism 300 for locking when the plug connector 111 is inserted into the socket 211.

[0055] Referring to Figures 2 - 5 , the locking mechanism 300 includes a locking piece 310. On the end face of the second body 210 near the socket 211, there is a radially extending positioning slide rail 217. The locking piece 310 is slidably installed in the positioning slide rail 217. The locking piece 310 is provided with a through hole 311 for the plug connector 111 to pass through. There is a locking groove 1112 provided outside the plug connector 111. When the plug connector 111 and the socket 211 are in plug-in fit, by sliding the locking piece 310, it can be engaged with or disengaged from the locking groove 1112 to achieve the locking and unlocking of the first body 110 and the second body 210.

[0056] Preferably, the locking mechanism 300 further includes a pre-locking post 320, a third spring 330, and a fourth spring 340.

[0057] On the end face of the second body 210, a guiding hole 218 is axially formed inside the locking piece 310. The pre-locking column 320 has a sliding mounting portion 321 and a pre-locking portion 322. The sliding mounting portion 321 is adapted to be inside the guiding hole 218. A third spring 330 is supported between the bottom of the guiding hole 218 and the sliding mounting portion 321. The pre-locking portion 322 extends outside the guiding hole 218. A positioning boss 323 is provided between the pre-locking portion 322 and the sliding mounting portion 321. An annular groove 324 is provided outside the pre-locking portion 322.

[0058] At the position of the locking piece 310 corresponding to the pre-locking column 320, a first locking opening 312 and a second locking opening 313 are successively connected to the outside of the through hole 311 along the direction of the positioning slide rail 217. The first locking opening 312 is wider than the second locking opening 313. The first locking opening 312 is adapted to the pre-locking portion 322. The second locking opening 313 is adapted to the annular groove 324. A fourth spring 340 is used to drive the locking piece 310 to slide toward the side away from the first locking opening 312 and the second locking opening 313.

[0059] Specifically, at one end of the locking piece 310 away from the first locking opening 312 and the second locking opening 313, a bent portion 314 bent toward the side of the second body 210 is provided. At the position of the second body 210 corresponding to the bent portion 314, a spring mounting groove 219 is provided. The fourth spring 340 is supported between the bottom of the spring mounting groove 219 and the bent portion 314.

[0060] In the pre-locking state, the pre-locking portion 322 of the pre-locking column 320 is stuck in the first locking opening 312 on the locking piece 310. At the same time, the positioning boss 323 of the pre-locking column 320 is pressed against the inside of the locking piece 310 under the action of the third spring 330. When the plug connector 111 is inserted into the socket 211, the outer end of the pre-locking column 320 abuts against the end face of the first body 110, pushing the pre-locking column 320 to retract into the guiding hole 218, and the third spring 330 is compressed. When the first locking opening 312 on the locking piece 310 slides to align with the annular groove 324 on the pre-locking portion 322, the fourth spring 340 will push the locking piece 310 to slide toward the side away from the first locking opening 312 and the second locking opening 313. The second locking opening 313 on the locking piece 310 slides into the annular groove 324 on the pre-locking portion 322, and the locking piece 310 is automatically stuck into the locking groove 1112 outside the plug connector 111, so as to realize automatic locking when the plug connector 111 is inserted into the socket 211.

[0061] When the connector 111 needs to be pulled out from the socket 211, the locking piece 310 can be directly pushed by the bending part 314 to slide towards the side of the first locking port 312 and the second locking port 313. The fourth spring 340 is compressed, and the locking piece 310 withdraws from the locking groove 1112 outside the connector 111, so as to release the locking between the first main body 110 and the second main body 210. The first spring 123 pushes out the first valve core 120, and the second spring 224 pushes out the second valve core 220, so that the first main body 110 and the second main body 210 automatically bounce off and separate. At this time, the second locking port 313 on the locking piece 310 pushes out the annular groove 324 on the pre-locking part 322, and the first locking port 312 is aligned with the pre-locking part 322 of the pre-locking column 320 again. The third spring 330 pushes out the pre-locking column 320 until the positioning boss 323 of the pre-locking column 320 abuts against the inner side of the locking piece 310. At this time, the pre-locking column 320 returns to the pre-locking state.

[0062] Therefore, this embodiment can quickly plug and lock and unlock and pop out. The plugging and unplugging operations of the first connector 100 and the second connector 200 are convenient and fast.

[0063] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered by the scope of the claims and the description of the present invention.

Claims

1. An independent check valve plug-and-play connection structure, comprising a first connector and a second connector, characterized in that: The first connector includes a first main body and a first valve core disposed within the first main body. At both ends of the first main body, a plug joint and a first pipe joint are respectively provided; The second connector includes a second main body and a second valve core disposed within the second main body. At both ends of the second main body, a socket and a second pipe joint are respectively provided; Wherein, the socket is adapted to the plug joint. When the plug joint is inserted into the socket, the first valve core opens the flow channel within the first main body, and the second valve core opens the flow channel within the second main body. When the plug joint is pulled out of the socket, the first valve core closes the flow channel within the first main body, and the second valve core closes the flow channel within the second main body.

2. The independent check valve plug-and-play connection structure according to claim 1, characterized in that: A first flow-through cavity connected between the plug joint and the first pipe joint is provided within the first main body. At one end of the first flow-through cavity close to the plug joint, a first valve port is provided; A flow channel hole is provided within the first valve core. The first valve core is slidably fitted within the first main body. One end of the first valve core passes through the plug joint, and the other end of the first valve core penetrates into the first flow-through cavity and is provided with a first valve head capable of blocking or opening the first valve port. At one end of the side wall of the first valve core close to the first valve head, a first water outlet window is provided. A first spring is provided within the first flow-through cavity and supported between the first valve head and one end of the first flow-through cavity close to the first pipe joint; A second flow-through cavity connected between the socket and the second pipe joint is provided within the second main body. At one end of the second flow-through cavity close to the socket, a second valve port is provided. A ring platform is provided on one side of the second valve port close to the socket; A flow channel hole is provided within the second valve core. The second valve core is slidably fitted within the second main body. One end of the second valve core is provided with an outer convex ring adapted within the socket. The other end of the second valve core penetrates into the second flow-through cavity and is provided with a second valve head capable of blocking or opening the second valve port. At one end of the side wall of the second valve core close to the second valve head, a second water outlet window is provided. A second spring is provided outside the second valve core and supported between the ring platform and the outer convex ring; 3. The independent check valve plug-and-play connection structure according to claim 2, characterized in that: The first main body includes a first structural member and a second structural member. The plug joint and the first flow-through cavity are respectively provided at both ends of the first structural member. First internal threads are provided inside the first structural member at one end of the first flow-through cavity. The first pipe joint is provided at one end of the second structural member. First external threads connected within the first internal threads are provided outside the other end of the second structural member; 4. The independent check valve plug-and-play connection structure according to claim 3, characterized in that: Second external threads are provided outside one end of the first structural member at the first flow-through cavity. An installation and fixing nut is connected outside the second external threads. An installation and positioning protrusion is provided between the first pipe joint and the second external threads of the first structural member; 5. The independent check valve plug-and-play connection structure according to claim 3, characterized in that: The second structural member is provided with a third external thread on the outside of one end of the first pipe joint, and a pagoda interface is provided on its side end. A nut locking sleeve is externally connected to the third external thread, and a pressing convex ring for pressing the connecting pipe sleeved outside the pagoda interface against the conical surface outside the pagoda interface is provided on the inner side of the end of the nut locking sleeve.

6. The independent check valve plug-and-play connection structure according to claim 2, wherein: The second main body includes a third structural member and a fourth structural member. The socket is provided at one end of the third structural member. A fourth external thread is provided at the other end of the third structural member. The second pipe joint and the second flow-through cavity are respectively provided at both ends of the fourth structural member. A second internal thread connected to the outside of the fourth external thread is provided inside the fourth structural member at the position of the second flow-through cavity.

7. The independent check valve plug-and-play connection structure according to claim 1, wherein: A positioning convex ring is provided outside the plug joint. The side of the positioning convex ring facing the second connecting member is transitioned with the surface of the plug joint through a conical guiding surface. An annular recess adapted to the positioning convex ring is provided inside the socket near the port. The annular recess and the inner surface of the socket are transitioned through a conical guiding surface.

8. The independent check valve plug-and-play connection structure according to any one of claims 1-7, wherein: It further includes a locking mechanism for locking when the plug joint is inserted into the socket; The locking mechanism includes a locking piece. A positioning slide rail extending radially is provided on the end face of the second main body near one end of the socket. The locking piece is slidably installed in the positioning slide rail. A through hole for the plug joint to pass through is provided on the locking piece. A locking groove is provided outside the plug joint. When the plug joint and the socket are inserted and matched, the locking piece can be made to snap into or out of the locking groove by sliding the locking piece.

9. The independent check valve plug-and-play connection structure according to claim 8, wherein: The locking mechanism further includes a pre-locking post, a third spring and a fourth spring; A guiding hole is axially opened on the end face of the second main body inside the locking piece. The pre-locking post has a sliding installation part and a pre-locking part. The sliding installation part is adapted to be inside the guiding hole. The third spring is supported between the bottom of the guiding hole and the sliding installation part. The pre-locking part extends outside the guiding hole. A positioning boss is provided between the pre-locking part and the sliding installation part. An annular groove is provided outside the pre-locking part. The locking piece is provided with a first locking port and a second locking port that are sequentially connected outside the through hole along the direction of the positioning slide rail corresponding to the position of the pre-locking post. The first locking port is wider than the second locking port. The first locking port is adapted to the pre-locking part. The second locking port is adapted to the annular groove. The fourth spring is used to drive the locking piece to slide away from the first locking port and the second locking port.

10. The independent check valve plug-and-play connection structure according to claim 9, wherein: One end of the locking piece away from the first locking port and the second locking port is provided with a bent part bent towards the second main body. A spring installation groove is provided outside the second main body corresponding to the position of the bent part. The fourth spring is supported between the bottom of the spring installation groove and the bent part.

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