Floating plug and fluid connector assembly

Abstract

The invention relates to the technical field of fluid connectors, in particular to a floating plug and a fluid connector assembly. The floating plug comprises the plug shell, the plug shell is internally provided with the mounting inner cavity extending front and back, the transmission core tube can radially float and deflect relative to the plug shell through the radial gap and the centering elastic structure arranged in the mounting inner cavity, and the plugging tube can be centered after the plug and the socket are separated. The fluid connector assembly comprises the floating plug and the socket, the problem that the whole floating plug occupies a large space due to the fact that a floating module is added for giving consideration to large radial floating tolerance and angle floating tolerance is solved, and miniaturization of the fluid connector assembly is further ensured; and the structural precision and the aesthetic degree of the server are improved.

Description

Technical Field

[0001] The invention relates to the technical field of fluid connectors, and in particular to a floating plug and a fluid connector assembly. Background Art

[0002] With the increasing demand for heat flux density, the heat dissipation requirements for high-power, high-heat flux density electronic equipment are also constantly improving. Traditional air cooling technology has gradually been unable to meet the needs of rapid heat dissipation. Liquid cooling technology has become the first choice for heat dissipation of high-power, high-heat flux density electronic equipment and an inevitable trend in the data center field due to its high heat dissipation efficiency, strong heat dissipation capacity, low noise, compact structure, energy saving and consumption reduction.

[0003] Cold plate liquid cooling server technology is highly mature and low-cost, and is being widely used. Cold plate liquid cooling servers include manual plug-in architecture and blind plug-in architecture. Blind plug-in architecture means that there is no need to manually connect the liquid cooling circuit, power circuit and data transmission link in sequence. By setting a blind plug-in fluid connector in a single node of the liquid cooling server and using it in conjunction with the water distributor connector of the cabinet, when in use, you only need to push the single node of the liquid cooling server into the server to automatically connect the liquid, power supply, data transmission, etc. The cold plate server with a blind plug-in architecture has the advantages of convenient connection and flexible layout, and has the application prospect of unmanned operation and maintenance guarantee. Although the use of the blind plug-in architecture can achieve one-time transmission and ensure the convenience of transmission, this connection structure has high requirements for the processing error of the relative installation position between the single node of the server and the cabinet, and to a certain extent increases the difficulty of the connector assembly installation operation. Once the above requirements are not met, the blind plug-in fluid connector plug and socket cannot be centrally coupled. Forced oblique plugging and unplugging may also cause mechanical damage and leakage of the fluid connector, resulting in server burnout and downtime.

[0004] Conventional blind-plug fluid connectors have a certain floating tolerance, such as a fluid connector assembly disclosed in the Chinese invention patent with the authorization announcement number CN104565629B, which can be compatible with the problem of misalignment caused by small errors, but cannot be compatible with angle errors. Data center servers are usually large in size and have low processing accuracy. The floating amount of conventional blind-plug fluid connectors cannot be compatible with the processing errors of liquid-cooled servers, nor can it solve the problem of difficulty in plugging due to angle errors. Therefore, it is usually necessary to use the existing blind-plug fluid connector with a floating module, such as a fluid connector socket and a fluid connector assembly disclosed in the Chinese invention patent with the application publication number CN117685439A. By setting the existing fluid connector in a floating module, a larger floating tolerance and a floating tolerance with more degrees of freedom can be achieved. However, adding a floating module will inevitably cause the problem of increased manufacturing costs, and because the floating module needs to be installed inside a single node of the server, it occupies and squeezes the internal space of the single node of the server, making the arrangement space of electronic components in the single node of the server tight. In addition, the server is usually a structural frame assembled by processing sheet metal, and its load-bearing capacity is limited. The existing blind-plug fluid connector needs to overcome the separation force generated between the plug and socket in order to maintain the plugged-in state after the plug and socket are inserted into place, which can easily cause deformation of the server's main structure and affect the structural accuracy and aesthetics of the server. Summary of the invention

[0005] The object of the present invention is to provide a floating plug to solve the problem that the floating plug occupies a large space due to the need to add a floating module in order to take into account the larger radial floating tolerance and angular floating tolerance of the existing blind-mating fluid connector. At the same time, the present invention also provides a fluid connector assembly using the floating plug to solve the same problem.

[0006] To achieve the above-mentioned purpose, the present invention provides a floating plug, including a plug shell, wherein the plug shell has an installation inner cavity extending forward and backward, a transmission core tube for transmitting a medium is installed in the installation inner cavity, the front end of the transmission core tube extending out of the installation inner cavity is sealed and connected with a plug tube, the plug tube is communicated with the inner cavity of the transmission core tube, a valve port is provided at the front end of the plug tube, a movable valve core cooperating with the valve port is provided in the plug tube, a valve core spring is provided on the rear side of the movable valve core, the valve core spring keeps the movable valve core in a position sealingly cooperating with the valve port in a natural state, a radial gap is provided between the transmission core tube and the plug shell so that the transmission core tube can float and / or swing radially to adapt to the insertion of the plug, and a return-to-center elastic structure is provided between the transmission core tube and the plug shell to prompt the plug tube to return to the center after the plug is detached from the socket.

[0007] Furthermore, a stopping structure for stopping the transmission core tube in the forward direction is provided in the plug housing, and a return spring for providing elastic force to the transmission core tube forward is also provided in the plug housing to elastically press the transmission core tube against the stopping structure.

[0008] Furthermore, the installation inner cavity of the plug shell is a stepped inner cavity, including a large diameter section and a small diameter section. The stopping structure is a step structure formed at the transition between the large diameter section and the small diameter section. A conical convex ring is provided on the outer peripheral surface of the tube body of the transmission core tube, and the step structure cooperates with the conical surface of the conical convex ring.

[0009] Furthermore, the reset spring is a conical spring, and the large diameter end thereof is pressed against the plug housing, and the small diameter end thereof is pressed against the rear side surface of the conical convex ring.

[0010] Furthermore, an annular groove for installing a return-to-center elastic structure is provided in the small diameter section of the installation inner cavity. The return-to-center elastic structure is an annular spring installed in the annular groove. The transmission core tube passes through the inner hole of the annular spring, and the inner side of the annular spring elastically supports the transmission core tube.

[0011] Furthermore, the annular spring is formed by winding a metal spring wire in a triangular spiral along a circumference, the vertex of the triangle is located on the inner side of the circumference so that the annular spring has an inner support sharp angle, the base of the triangle is located on the outer side of the circumference so that the annular spring has an outer mounting circumference, the annular spring is mounted in the annular groove via the outer mounting circumference, and the annular spring (10) elastically supports the transmission core tube via the inner support sharp angle.

[0012] Furthermore, the groove walls on both sides of the annular groove are inward-turned structures to constrain the annular spring to retract inward.

[0013] Furthermore, the centering elastic mechanism includes a hollow tube body, and at least two outwardly extending punching spring arms are provided on the side wall of the tube body. The ends of the punching spring arms are tightly pressed against the bottom of the annular groove. The transmission core tube passes through the tube body and fits against the inner side surface of the tube body to elastically support the tube body.

[0014] Furthermore, the centering elastic mechanism includes a hollow tube body, and at least two inwardly extending punching spring arms are provided on the side wall of the tube body. The ends of the punching spring arms press against the outer tube wall of the transmission core tube, and the outer side surface of the tube body is installed in the annular groove.

[0015] The present invention provides a new floating plug, wherein a radial gap is provided between the transmission core tube and the plug housing so that the transmission core tube can radially float and deflect relative to the plug housing, and a return-to-center elastic structure is provided between the transmission core tube and the plug housing so as to cause the plug tube to return to the center after the plug is detached from the socket. The floating plug itself can achieve greater floating in the radial and angular directions, and the tube body docking structure such as the transmission core tube and the plug tube is used as a medium transmission channel. On the basis of achieving medium transmission, the overall structure is simple and the radial size is small. In this way, the radial size of the plug housing can be reduced while ensuring the floating gap between the transmission core tube and the plug housing, thereby solving the problem that the existing blind-plug fluid connector needs to increase a floating module in order to take into account a larger radial floating tolerance and an angular floating tolerance, resulting in a larger space occupied by the entire floating plug.

[0016] The fluid connector assembly of the present invention comprises a floating plug and a socket, wherein the floating plug comprises a plug housing, wherein the plug housing has an installation inner cavity extending forward and backward, wherein a transmission core tube for transmitting a medium is inserted in the installation inner cavity, wherein the front end of the transmission core tube extending out of the installation inner cavity is sealedly connected with a plug tube, wherein the plug tube is communicated with the inner cavity of the transmission core tube, wherein a valve port is arranged at the front end of the plug tube, wherein a movable valve core cooperating with the valve port is arranged in the plug tube, wherein a valve core spring is arranged at the rear side of the movable valve core, wherein the valve core spring keeps the movable valve core in a position in a natural state in a sealing cooperation with the valve port, wherein a radial gap is arranged between the transmission core tube and the plug housing so that the transmission core tube can float and / or deflect radially in order to adapt to the insertion of the plug, wherein a return-to-center elastic structure is arranged between the transmission core tube and the plug housing so as to cause the plug tube to return to the center after the plug is separated from the socket; wherein the socket comprises a socket housing, wherein the socket housing is provided with an outwardly expanding guide surface at a port close to the plugging end, which guides the plug tube of the floating plug during plugging.

[0017] Furthermore, a stopping structure for stopping the transmission core tube in the forward direction is provided in the plug housing, and a return spring for providing elastic force to the transmission core tube forward is also provided in the plug housing to elastically press the transmission core tube against the stopping structure.

[0018] Furthermore, the installation inner cavity of the plug shell is a stepped inner cavity, including a large diameter section and a small diameter section. The stopping structure is a step structure formed at the transition between the large diameter section and the small diameter section. A conical convex ring is provided on the outer peripheral surface of the tube body of the transmission core tube, and the step structure cooperates with the conical surface of the conical convex ring.

[0019] Furthermore, the reset spring is a conical spring, and the large diameter end thereof is pressed against the plug housing, and the small diameter end thereof is pressed against the rear side surface of the conical convex ring.

[0020] Furthermore, an annular groove for installing a return-to-center elastic structure is provided in the small diameter section of the installation inner cavity. The return-to-center elastic structure is an annular spring installed in the annular groove. The transmission core tube passes through the inner hole of the annular spring, and the inner side of the annular spring elastically supports the transmission core tube.

[0021] Furthermore, the annular spring is formed by winding a metal spring wire in a triangular spiral along a circle, the vertex of the triangle is on the inner side of the circle so that the annular spring has an inner supporting sharp angle, and the base of the triangle is on the outer side of the circle so that the annular spring has an outer mounting circumference. The annular spring is installed in the annular groove through the outer mounting circumference, and the annular spring elastically supports the transmission core tube through the inner supporting sharp angle.

[0022] Furthermore, the groove walls on both sides of the annular groove are inward-turned structures to constrain the annular spring to retract inward.

[0023] Furthermore, the centering elastic mechanism includes a hollow tube body, and at least two outwardly extending punching spring arms are provided on the side wall of the tube body. The ends of the punching spring arms are tightly pressed against the bottom of the annular groove. The transmission core tube passes through the tube body and fits against the inner side surface of the tube body to elastically support the tube body.

[0024] Furthermore, the centering elastic mechanism includes a hollow tube body, and at least two inwardly extending punching spring arms are provided on the side wall of the tube body. The ends of the punching spring arms press against the outer tube wall of the transmission core tube, and the outer side surface of the tube body is installed in the annular groove.

[0025] Furthermore, the outwardly expanded guiding surface is an inner conical surface.

[0026] The present invention provides a fluid connector assembly. By optimizing the floating plug structure in the fluid connector assembly and adopting a simple tube body docking structure as a medium transmission channel, the radial size of the entire floating plug is reduced to a certain extent. As a result, the fluid connector assembly can take into account a larger radial floating tolerance and an angular floating tolerance while avoiding the problem of a larger floating plug occupying space due to an increase in a floating module, which further has a beneficial effect on the miniaturization of the entire fluid connector assembly and improves the structural accuracy and aesthetics of the server. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of the internal structure of a blind plug-in architecture server; Figure 2 for Figure 1 A local enlarged schematic diagram of the middle A; Figure 3 It is a schematic diagram of the floating plug and fluid connector assembly of the present invention being applied inside a blind-plug architecture server; Figure 4It is a structural schematic diagram of the floating plug and socket of the present invention; Figure 5 It is a structural schematic diagram of the floating plug and the socket of the present invention from another perspective; Figure 6 It is a structural schematic diagram of the floating plug and socket of the present invention from another perspective; Figure 7 A schematic diagram of the internal structure of the floating plug of the present invention; Figure 8 It is a schematic diagram of the floating plug and the socket of the present invention in the plugged state; Fig. 9 It is a schematic diagram of the floating plug and the socket of the present invention being in a state where the axes are concentric; Fig.10 It is a schematic diagram of the floating plug and the socket of the present invention floating in the radial direction; Fig.11 It is a schematic diagram of the floating plug and the socket of the present invention when they deflect in the radial direction; Fig.12 It is a schematic diagram of the floating plug and the socket of the present invention when floating and deflecting simultaneously occur in the radial direction; Fig.13 It is a structural schematic diagram of a centering elastic structure of the present invention in an installed state; Fig.14 It is a schematic cross-sectional structure diagram of a center-restoring elastic structure of the present invention in an installed state; Fig.15 It is a structural schematic diagram of a centering elastic structure of the floating plug of the present invention being in a squeezed state when the floating plug is radially floating; Fig.16 A three-dimensional structural diagram of an embodiment of the center-restoring elastic structure of the present invention; Fig.17 for Fig.15 The three-dimensional structure diagram of the centering elastic structure from another perspective; Fig.18 It is a structural schematic diagram of a second embodiment of the center-restoring elastic structure of the present invention; Fig.19 It is a structural schematic diagram of a third embodiment of the center-restoring elastic structure of the present invention; In the figure: 1. server cabinet; 11. single server node; 12. water distributor; 2. floating plug; 21. plug housing; 211. annular groove; 212. inverted structure; 22. transmission core tube; 221. conical convex ring; 222. outer convex ring; 23. plug-in tube; 24. movable valve core; 25. valve core spring; 26. return elastic structure; 261. tube body; 262. punching spring arm; 3. socket; 31. socket housing; 311. outward expansion guide surface; 32. sliding bushing; 33. supporting structure; 34. fixed valve core; 35. socket valve core spring; 4. floating plug mounting bracket; 5. hose; 6. sealing ring; 7. stop structure; 8. reset spring; 9. mounting nut; 10. annular spring; 101. apex; 102. bottom edge. DETAILED DESCRIPTION

[0028] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0029] For the sake of convenience in explanation below, the "front" and "rear" of the floating plug refer to the end of the floating plug close to the plug-in end of the socket and the end facing away from the plug-in end, and the "front" and "rear" of the socket refer to the end of the socket close to the plug-in end of the floating plug and the end facing away from the plug-in end.

[0030] The present invention provides a new floating plug, which uses a transmission core tube for transmitting the medium and a sealing connection with a plug-in tube for plugging with a socket as a medium transmission channel, simplifies the medium transmission structure and makes it have a smaller radial dimension. It is floatingly assembled with a shell, so that the overall radial dimension of the floating plug can be reduced on the basis of satisfying the floating clearance. Not only is the structure simple, but also its overall occupied space can be reduced.

[0031] The fluid connector assembly of the present invention comprises a socket and a floating plug of the present invention, wherein the socket comprises a socket housing, and when the floating plug and the socket are plugged into each other, the floating plug is connected to the socket through an outward expansion guide surface provided at a port of the socket housing near the plug end. The floating plug comprises a plug housing, wherein the plug housing has an installation inner cavity extending forward and backward, wherein a transmission core tube for transmitting a medium is installed in the installation inner cavity, and a radial gap and a return elastic structure are provided between the transmission core tube and the plug housing to ensure that the transmission core tube can generate radial floating and / or deflection relative to the plug housing.

[0032] Since the floating plug of the present invention can realize rapid conduction and disconnection between a single node of the server and a server cabinet, and has a large floating tolerance at a large inclination angle, and can realize radial and angular floating between a single node of the server and a server cabinet, the fluid connector assembly can take into account a larger radial floating tolerance and an angular floating tolerance, and can reduce the locking strength requirements for the entire server to a certain extent, and reduce the installation space occupied by the floating plug. Therefore, the fluid connector assembly of the present invention can effectively reduce the deformation of the server main structure and improve the structural accuracy and aesthetics of the server.

[0033] Based on the above main concepts, the following provides an application scenario of an embodiment of a connector assembly when applied to media transmission between a single server node and a server cabinet for illustration.

[0034] like Figure 1-12 As shown, a water divider 13 and a plurality of server single nodes 11 are provided in the server cabinet 1. The side panels of the water divider 12 and the server single node 11 are connected via a fluid connector assembly. The fluid connector assembly in the embodiment includes a socket 3 and a floating plug 2. In addition, in the server single node 11, the side of the floating plug 2 facing away from the plug end of the socket 3 is connected to the floating plug 2 in the same row via a hose 5, thereby realizing rapid connection and disconnection of the transmission medium between the server single node 11 and the server cabinet 1.

[0035] The floating plug 2 includes a plug housing 21, which has an installation inner cavity extending forward and backward. A transmission core tube 22 for transmitting a medium is installed in the installation inner cavity. The front end of the transmission core tube 22 extending out of the installation inner cavity is sealed and connected with a plug tube 23. The plug tube 23 is communicated with the inner cavity of the transmission core tube 22. A valve port is provided at the front end of the plug tube 23. A movable valve core 24 cooperating with the valve port is provided in the plug tube 23. A valve core spring 25 is provided at the rear side of the movable valve core 24. The valve core spring 25 keeps the movable valve core 24 in a position that seals and cooperates with the valve port in a natural state. A radial gap is provided between the transmission core tube 22 and the plug housing 21 so that the transmission core tube 22 can float and / or swing radially to adapt to the insertion of the plug. A return-to-center elastic structure 26 is provided between the transmission core tube 22 and the plug housing 21 to cause the plug tube 23 to return to the center after the plug is detached from the socket.

[0036] The socket 3 in this embodiment is the same as the socket included in a fluid connector assembly disclosed in the Chinese invention patent with the authorization announcement number CN104565629B in the background technology. The socket 3 includes a socket housing 31. The socket housing 31 is provided with an outward expansion guide surface 311 at the port near the front end, which plays a guiding role with the plug tube 23 of the floating plug 2 when plugging. The socket 3 is also provided with an axially slidable sliding bushing 32 in the socket housing 31 near the outward expansion guide surface 311. A fixed valve core 34 is installed in the socket 3. The fixed valve core 34 is fixedly installed in the socket 3 through a support structure 33 provided at its rear end. A socket valve core spring 35 is provided between the sliding bushing 32 and the support structure 33. When the plug and socket are in a completely separated state, the front end of the fixed valve core 34 is sealed with the sliding bushing 32. In addition, a sealing matching structure is also provided between the sliding bushing 32 and the socket housing 31. The sealing matching structure is a sealing ring 6 with a certain length provided on the socket housing 31.

[0037] In the process of the floating plug 2 and the socket 3 of the existing fluid connector assembly, the plug-in tube 23 of the floating plug 2 is inserted into the socket housing 31 through the guidance of the outward expansion guide surface 311 of the socket 3. When further plugged, the plug-in tube 23 pushes the sliding bushing 32, and the sliding bushing 32 moves toward the rear end of the socket 3 in the axial direction. The fixed valve core 34 that seals with the sliding bushing 32 is exposed and contacts with the movable valve core 24 on the floating plug 2. The plug-in tube 23 replaces the sliding bushing 32 and maintains a sealed fit with the socket housing 31. After the floating plug and the socket are inserted into place, the fixed valve core 34 and the movable valve core 24 push each other, and the valve core spring 25 and the socket valve core spring 35 are squeezed at the same time, so that a large separation force is generated between the floating plug 2 and the socket 3.

[0038] In order to keep the plug and socket connected in place, the separation force generated by the valve core spring 25 and the socket valve core spring 35 needs to be overcome, which requires the server to have a higher locking strength. Existing fluid connector assemblies mostly use larger locking members to overcome the above separation force.

[0039] In order to avoid the problem of tight arrangement space for electronic components in a single node of the server due to the large locking member used to overcome the separation force, reduce the possibility of deformation of the main structure of the server, and further improve the structural accuracy and aesthetics of the server, in a more preferred embodiment, a stop structure 7 for stopping the transmission core tube 22 in the forward direction is provided in the plug housing 21, and a reset spring 8 for providing elastic force to the transmission core tube 22 in the forward direction is also provided in the plug housing 21. When the plug and socket are in a completely disengaged state, the reset spring 8 provides elastic force to the transmission core tube 22 forward, pressing the transmission core tube 22 against the stop structure 7. After the plug and socket are inserted into place, the reset spring 8 is subjected to backward pressure. At this time, the reset spring 8 provides a force in the opposite direction of the separation force to overcome a part of the separation force, which reduces the separation force generated by the valve core spring 25 and the socket valve core spring 35 to a certain extent, and reduces the locking strength requirements of the server.

[0040] The stopping structure 7 provided on the mounting inner cavity of the plug shell 21 can be provided in a variety of forms. For example, the stopping structure 7 can be an annular protrusion provided on the mounting inner cavity. Specifically, the mounting inner cavity is an inner cavity with the same inner diameter at the front and rear ends. The annular protrusion provided on the mounting inner cavity can realize the axial direction. The transmission core tube 22 is stopped in the forward direction. However, considering that the transmission core tube 22 and the plug shell 21 must also be able to achieve radial floating and deflection, therefore, in a more preferred embodiment, the mounting inner cavity of the plug shell 21 is a stepped inner cavity, including a large diameter section and a small diameter section, and the stopping structure 7 is a step structure formed at the transition between the large diameter section and the small diameter section, and a conical convex ring 221 is provided on the outer peripheral surface of the tube body of the transmission core tube 22, and the step structure cooperates with the conical surface of the conical convex ring 221. The two vertical step surfaces of the step structure are provided with chamfers at the intersection of the surfaces, which can fit with the conical surface of the conical convex ring 221, to ensure that when the transmission core tube 22 floats or deflects radially relative to the plug housing 21, the conical surface and the chamfer are more likely to slide relative to each other.

[0041] When the return spring 8 is a cylindrical spring, the rear end of the cylindrical spring is pressed against the plug housing 21, and the front end is pressed against the rear side of the conical convex ring 221. When the transmission core tube 22 floats and / or deflects radially relative to the plug housing 21, the rear side of the conical convex ring 221 drives the front end of the cylindrical spring to move toward one side of the plug housing 21. Since the diameter of the cylindrical spring is substantially the same throughout, the front end of the cylindrical spring cannot cooperate with the rear side of the conical convex ring 221 to move toward one side of the plug housing 21. The return spring 8 is preferably arranged to ensure that a part of the separation force can be overcome while promoting the floating and / or deflection of the transmission core tube 22 in the radial direction. Therefore, in one embodiment, the return spring 8 provided in the plug housing 21 for providing elastic force to the transmission core tube 22 toward the front is a conical spring, and the large diameter end is pressed against the plug housing 21, and the small diameter end is pressed against the rear side surface of the conical convex ring 221. When the transmission core tube 22 floats and / or deflects radially relative to the plug housing 21, the rear side surface of the conical convex ring 221 drives the small diameter end toward one side of the plug housing 21. At this time, the corresponding side of the conical spring is squeezed, cooperating with the transmission core tube 22 to complete the radial floating and / or deflection relative to the plug housing 21.

[0042] In addition to the radial gap between the transmission core tube 22 and the plug housing 21 so that the transmission core tube 22 can float and deflect radially relative to the plug housing 21, a centering elastic structure 26 is also provided between the transmission core tube 22 and the plug housing 21 to promote the plug tube 23 to return to the center after the floating plug 2 is completely separated from the socket 3. The centering elastic structure can be arranged in a variety of ways. For example, the centering elastic structure 26 can be two groups of support arms arranged outside the transmission core tube 22, one group of support arms extending forward obliquely, and the other group of support arms extending backward obliquely, one end of the two groups of support arms being hinged to the hinge seat on the outside of the transmission core tube, and the other end being provided with a support arm sliding wheel that rolls with the mounting inner cavity, and a limit tension spring is arranged between the support arm and the transmission core tube 22, the limit tension spring provides the two groups of support arms with a force to swing in a direction close to each other, and the support arm is reset by the elastic force generated by the limit spring in the rebound process after being stretched, so that the transmission core tube 22 can quickly promote the plug tube 23 to return to the center after radial floating and deflecting relative to the plug housing 21.

[0043] Considering that the above-mentioned setting method will have an adverse effect on the processing cost and difficulty of parts, such as Figure 13-17As shown, in one embodiment, the centering elastic structure 26 is an annular spring 10 installed in an annular groove 211, and the transmission core tube 22 passes through the inner hole of the annular spring 10, and the inner side of the annular spring 10 elastically supports the transmission core tube 22. Specifically, the annular spring 10 is formed by winding a metal spring wire in a triangular spiral along a circumference, and the vertex 101 of the triangular spiral is located on the inner side of the annular spring 10, and the base 102 of the triangle constitutes the outer circumference of the annular spring 10. The annular spring 10 is installed in the annular groove 211 through the outer circumference, and the annular spring 10 elastically supports the transmission core tube 22 through the inner support sharp angle formed by the inner vertex 101. Under the action of the annular spring 10, the transmission core tube 22, the plug housing 21 and the plug tube 23 maintain concentric axes in the axial direction. When the floating plug 2 is plugged into the socket 3, the plug tube 23 radially floats and deflects under the guidance of the outward expansion guide surface 311 of the socket housing 31. At this time, the transmission core tube 22, the plug housing 21 and the plug tube 23 are not concentric in the axial direction. One side of the outer side of the transmission core tube 22 compresses the annular spring 10, and the other side opposite to it moves away from the annular spring 10. When the floating plug 2 is separated from the socket 3, the transmission core tube 22 drives the plug tube 23 at the front end to return to a state of being concentric with the axis of the plug housing 21 under the action of the annular spring 10.

[0044] In order to prevent the annular spring 10 from being squeezed out of the annular groove 211 due to excessive extrusion pressure, in a more preferred embodiment, the groove walls on both sides of the annular groove 211 are inwardly turned structures 212. Specifically, the annular groove 211 is provided with inward bends at both end notches in the length direction to constrain the annular spring 211 to retract inward.

[0045] like Fig.18 As shown, in one embodiment, the re-centering elastic mechanism 26 comprises a hollow tube body 261, and at least two outwardly extending punching elastic arms 262 are provided on the side wall of the tube body 261, and the ends of the punching elastic arms 262 are pressed against the bottom of the annular groove 211, and the transmission core tube 22 passes through the tube body 261 and fits against the inner side of the tube body 261 and elastically supports the tube body 261. Similarly, when the floating plug 2 and the socket 3 are plugged in, the plug tube 23 floats and deflects radially under the guidance of the outward expansion guide surface 311 of the socket housing 31. At this time, the transmission core tube 22, the plug housing 21 and the plug tube 23 are not concentric in the axial direction. The punching elastic arms 262 on one side of the re-centering elastic mechanism of this embodiment are squeezed by the inner wall of the inner cavity of the plug housing 21. When the floating plug 2 is separated from the socket 3, the punching elastic arms 262 return to a state without stress, and the re-centering elastic mechanism of this embodiment drives the transmission core tube 22 and the plug tube 23 to return to a state concentric with the axis of the plug housing 21.

[0046] like Fig.19As shown, in another embodiment, the return-to-center elastic mechanism 26 includes a hollow tube body 261, and at least two inwardly extending punching spring arms 262 are provided on the side wall of the tube body 261. The ends of the punching spring arms 262 press against the outer tube wall of the transmission core tube 22, and the outer side surface of the tube body 261 is installed in the annular groove 211. When the floating plug 2 and the socket 3 are plugged in, the plug tube 23 floats and deflects radially under the guidance of the outward expansion guide surface 311 of the socket housing 31. At this time, the axes of the transmission core tube 22, the plug housing 21 and the plug tube 23 are not concentric in the axial direction. The punching spring arms 262 on one side of the return-to-center elastic mechanism of this embodiment are squeezed by the transmission core tube 22. When the floating plug 2 is separated from the socket 3, the punching spring arms 262 return to a state without stress, and the transmission core tube 22 drives the plug tube 23 to return to a state concentric with the axis of the plug housing 21.

[0047] In order to ensure that the plug-in tube 23 and the transmission core tube 22 always maintain a sealed connection, in one embodiment, the plug-in tube 23 is forcibly inserted into the transmission core tube 22, and a sealing ring 6 is provided between the plug-in tube 23 and the transmission core tube 22 to ensure a sealed connection. In another embodiment, the plug-in tube 23 is installed on the transmission core tube 22 by means of a threaded connection. Specifically, the outer periphery of the transmission core tube 22 is provided with an external thread, and the plug-in tube 23 is provided with an internal thread used in conjunction with the external thread. A sealing ring 6 is provided at the front end of the threaded connection section. The above arrangement realizes that the plug-in tube 23 and the transmission core tube 22 always maintain a sealed connection. The outer periphery of the transmission core tube 22 is provided with a stop structure that stops the plug-in tube 23 in the backward direction, so that the transmission core tube 22 and the plug-in tube 23 remain in a sealed position without causing leakage of the transmission medium due to radial or angular floating.

[0048] Based on this, in one embodiment, a groove is provided on the outer circumference of the transmission core tube 22, and the groove is an annular groove, in which a C-shaped collar is installed, and the C-shaped collar constitutes a stop structure, and the front end face of the C-shaped collar fits with the rear end face of the plug-in tube 23, and stops the plug-in tube 23 in the backward direction. In another embodiment, the stop structure is an outer convex ring 222, and the front end face of the outer convex ring 222 fits with the rear end face of the plug-in tube 23, and stops the plug-in tube 23 in the backward direction.

[0049] When the floating plug 2 is plugged into the socket 3, the outward expansion guide surface 311 provided at the front end of the socket 3 guides the plug-in and the socket. Based on this, in one embodiment, the outward expansion guide surface can be a trumpet-shaped arc surface, and when the plug and the socket are plugged into each other, the trumpet-shaped arc surface cooperates with the plug-in tube 23. In another embodiment, the outward expansion guide surface 311 is an inner conical surface. After the floating plug 2 and the socket 3 are plugged into place, the outer sides of the plug housing 21 and the socket housing 31 are locked simultaneously by using the mounting nut 9. In this embodiment, the mounting nut is sleeved on the outer side of the plug housing 21, and when the plug and the socket are completely separated, the mounting nut 9 is located at the front end of the outer side of the plug housing 21 by means of a threaded connection. After the plug and the socket are plugged into place, the mounting nut 9 is screwed to sleeve the plug housing 21 and the socket housing 31 together to realize the locking function.

[0050] The present invention further provides a floating plug, and an embodiment of the floating plug has the same structure as the floating plug in the above-mentioned fluid connector assembly, which will not be further described herein.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The patent protection scope of the present invention shall be based on the claims. All equivalent structural changes made using the contents of the description and drawings of the present invention should also be included in the protection scope of the present invention.

Claims

1. A floating plug, characterized in that: The invention comprises a plug housing (21), wherein the plug housing (21) has an installation inner cavity extending forward and backward, wherein a transmission core tube (22) for transmitting a medium is installed in the installation inner cavity, wherein the front end of the transmission core tube (22) extending out of the installation inner cavity is sealedly connected to a plug tube (23), wherein the plug tube (23) is communicated with the inner cavity of the transmission core tube (22), wherein a valve port is provided at the front end of the plug tube (23), wherein a movable valve core (24) cooperating with the valve port is provided in the plug tube (23), wherein a valve core spring (25) is provided at the rear side of the movable valve core (24), wherein the valve core spring (25) maintains the movable valve core (24) in a position in a natural state in a sealing manner cooperating with the valve port, wherein a radial gap is provided between the transmission core tube (22) and the plug housing (21) so that the transmission core tube (22) can float and / or deflect radially in order to adapt to the insertion of the plug, and wherein a return-to-center elastic structure (26) is provided between the transmission core tube (22) and the plug housing (21) so as to cause the plug tube (23) to return to the center after the plug is detached from the socket.

2. The floating plug according to claim 1, characterized in that: A stop structure (7) for stopping the transmission core tube (22) in the forward direction is provided in the plug housing (21), and a return spring (8) for providing an elastic force to the transmission core tube (22) in the forward direction is also provided in the plug housing (21) so as to elastically press the transmission core tube (22) against the stop structure (7).

3. The floating plug according to claim 2, characterized in that: The installation inner cavity of the plug housing (21) is a stepped inner cavity, including a large diameter section and a small diameter section. The stop structure (7) is a step structure formed at the transition between the large diameter section and the small diameter section. A conical convex ring (221) is provided on the outer peripheral surface of the tube body of the transmission core tube (22). The step structure is engaged with the conical surface of the conical convex ring (221).

4. The floating plug according to claim 2, characterized in that: The return spring (8) is a conical spring, with a large diameter end pressed against the plug housing and a small diameter end pressed against the rear side surface of the conical convex ring (221).

5. The floating plug according to claim 3, characterized in that: An annular groove (211) for installing a centering elastic structure (26) is provided in the small diameter section of the installation inner cavity. The centering elastic structure (26) is an annular spring (10) installed in the annular groove (211). The transmission core tube (22) passes through the inner hole of the annular spring (10). The inner side of the annular spring (10) elastically supports the transmission core tube (22).

6. The floating plug according to claim 5, characterized in that: The annular spring (10) is formed by winding a metal spring wire in a triangular spiral along a circumference, the vertex (101) of the triangle is located on the inner side of the circumference so that the annular spring (10) has an inner support sharp corner, the base (102) of the triangle is located on the outer side of the circumference so that the annular spring (10) has an outer mounting circumference, the annular spring (10) is installed in the annular groove (211) through the outer mounting circumference, and the annular spring (10) elastically supports the transmission core tube (22) through the inner support sharp corner.

7. The floating plug according to claim 5, characterized in that: The groove walls on both sides of the annular groove (211) are inverted structures (212) to constrain the annular spring to retract inwards.

8. The floating plug according to claim 1, characterized in that: The centering elastic mechanism (26) comprises a hollow tube body (261), and at least two outwardly extending punching elastic arms (262) are provided on the side wall of the tube body. The ends of the punching elastic arms (262) are tightly pressed against the bottom of the annular groove (211). The transmission core tube (22) passes through the tube body (261) and fits against the inner side surface of the tube body (261) to elastically support the tube body (261).

9. The floating plug according to claim 1, characterized in that: The centering elastic mechanism (26) comprises a hollow tube body (261), and at least two inwardly extending punching elastic arms (262) are provided on the side wall of the tube body. The ends of the punching elastic arms (262) press against the outer tube wall of the transmission core tube (22), and the outer side surface of the tube body (261) is installed in the annular groove (211).

10. A fluid connector assembly comprising a floating plug (2) and a socket (3), characterized in that: The floating plug (2) is the floating plug according to any one of claims 1 to 9; the socket (3) comprises a socket housing (31), and the socket housing (31) is provided with an outwardly expanded guide surface (311) at a port close to the plugging end for guiding the plug tube (23) of the floating plug (2) during plugging.

11. The fluid connector assembly according to claim 10, characterized in that: The outwardly expanded guiding surface (311) is an inner conical surface.

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