Fluid connector and automatic quick connector assembly

Abstract

The invention relates to the field of pipe joints with quick cut-off devices, in particular to a fluid joint and an automatic quick joint assembly. When the fluid connectors are connected with an adaptive connector in an inserted mode, the valve element pushing sleeve can be pushed backwards and drive the spherical valve element to move and roll over, steering of a valve element channel is achieved, conduction is achieved after the two fluid connectors are connected in place, and on the contrary, when the fluid connectors and the adaptive connector are pulled out and separated, the valve element pushing sleeve can be pushed backwards to drive the spherical valve element to move and roll over. When the two fluid connectors are connected, the valve element pushing sleeve is not pushed backwards any more, the elastic maintaining structure pushes the spherical valve element to reset forwards and roll over, steering of a valve element channel is achieved, and the valve elements in the two connectors can be closed when the two fluid connectors are disconnected, that is, opening and closing of the valve elements in the two fluid connectors are achieved while the two fluid connectors are connected and separated. Operation is simple, and use is convenient.

Description

Technical Field

[0001] The invention relates to the field of pipe joints with quick disconnect devices, in particular to a fluid joint and an automatic quick joint assembly. Background Art

[0002] Ball-valve-based quick connectors are used to quickly connect and disconnect pipes, offering strong flow capacity and minimal pressure loss. Currently, most commercially available quick connector assemblies require that after the fluid connector and adapter are plugged in, the operator operates the operating handles on each connector to open the valve cores in both connectors. Before disconnecting, the operator operates the operating handles on each connector to close the valve cores in both connectors, thereby separating the two connectors. This type of quick connector assembly is cumbersome and complex to use. Summary of the Invention

[0003] The present invention aims to provide a fluid connector that solves the cumbersome operation problem of existing quick connectors, which require separate operations for connecting and disconnecting two connectors and opening and closing two valve cores. The present invention also provides an automatic quick connector assembly including the aforementioned fluid connector to solve the aforementioned problem.

[0004] The fluid connector of the present invention includes a fixed shell with an interface at the rear end, a pair of mounting arms arranged opposite to each other are provided on the fixed shell, a spherical valve core is movably installed between the mounting arms in the front-to-back direction, an elastic retaining structure is installed in the fixed shell to provide an elastic force for the spherical valve core to move forward so as to keep it in the front limit position, a pin-groove matching structure is provided between the spherical valve core and the mounting arm to enable the spherical valve core to move forward and backward in a rolling posture, a valve core push sleeve is sealed and slidably installed in the fixed shell in the front-to-back direction, and the fixed shell blocks the valve core push sleeve from the front side. When the spherical valve core is connected to the adapter joint, the spherical valve core is pushed to move to the rear limit position by the spherical valve core push sleeve of the adapter joint. A valve core channel is provided on the spherical valve core. When the spherical valve core moves to the rear limit position, the spherical valve core rolls to a state where the valve core channel extends forward and backward, and is connected with the spherical valve core push sleeve and the interface front to back. When the spherical valve core push sleeve is not subjected to top pressure and the spherical valve core returns to the front limit position, the spherical valve core rolls to a state where the valve core channel and the spherical valve core push sleeve are separated.

[0005] Furthermore, the opposite sides of the spherical valve core have mutually parallel guide mating surfaces, and the paired mounting arms are fitted with the guide mating surfaces through relative guide walls to determine the rolling axis of the spherical valve core. The pin-groove mating structure includes a rolling guide groove provided on the guide mating surface and a guide pin provided on the guide wall. The rolling guide groove extends radially outward from the center of the guide mating surface. The guide pin is eccentrically arranged relative to the spherical valve core and corresponds to the outer end position of the rolling guide groove, thereby constraining the rolling posture of the spherical valve core through the guide pin and the rolling guide groove.

[0006] Furthermore, the elastic retaining structure includes a valve core retaining sleeve, which is equipped with a retaining spring and whose front end pushes the rear outer surface of the spherical valve core. When the spherical valve core is in the rear limit position, the valve core channel is connected to the interface through the inner hole of the valve core retaining sleeve.

[0007] Furthermore, the retaining spring sleeve is located outside the valve core retaining sleeve to share a space in the front-to-back direction with the valve core retaining sleeve.

[0008] Furthermore, the flow areas of the valve core retaining sleeve, the interface and the valve core channel are equal or close to each other to ensure the flow rate.

[0009] Furthermore, the outer side surface of the mounting arm body is an arc surface on the same circumference, and the valve core pushing sleeve is sleeved on the outer side of the mounting arm body and is guided and matched with the outer side surface of the mounting arm body through the inner circumference.

[0010] Furthermore, a ball recess is provided on the outer surface of the spherical valve core so as to face the adapter forward when the spherical valve core is in the front limit position and is used to accommodate the front end portion of the spherical valve core of the adapter.

[0011] Furthermore, the outer peripheral surface of the valve core push sleeve has a sealing fitting outer peripheral surface for sealingly fitting with the fixed housing of the adapter joint when they are plugged into each other.

[0012] The present invention pioneers a novel fluid connector in which a spherical valve core is movably mounted in the front-to-back direction and is equipped with a retaining structure that provides a forward elastic force to the spherical valve core to maintain it in a front limit position. A pin-slot mating structure is also provided between the spherical valve core and the valve core mounting arm. The pin-slot mating structure enables the spherical valve core to roll back and forth around its own diameter during forward and backward movement relative to the valve core mounting arm. A valve core push sleeve installed in a fixed housing seals with the front outer surface of the spherical valve core via its front inward-turned edge. When docked with an adapter, the valve core push sleeve is pushed by the adapter to drive the spherical valve core to move rearward to a rear limit position. A valve core passage is provided in the spherical valve core. When the spherical valve core moves to the rear limit position, the spherical valve core rolls to a state in which the valve core passage extends forward and backward, and is in front-to-back communication with the valve core push sleeve and the interface. When the valve core push sleeve is no longer under pressure and the spherical valve core returns to the front limit position, the spherical valve core rolls to a state in which the valve core passage is isolated from the valve core push sleeve. When the two fluid connectors are plugged in and connected to the adapter connector, the valve core pushing sleeve can be pushed backward and drive the spherical valve core to move and roll, thereby realizing the steering of the valve core channel. After the two fluid connectors are connected in place, conduction is achieved at the same time. On the contrary, when the fluid connector and the adapter connector are pulled out and separated, the valve core pushing sleeve is no longer pushed backward, and the elastic retaining structure pushes the spherical valve core to reset forward and roll, thereby realizing the steering of the valve core channel. The two fluid connectors can be disconnected to realize the closing of the internal valve cores of the two connectors, that is, the opening and closing of the internal valve cores of each of the two connectors are realized at the same time when the two fluid connectors are connected and separated. The operation is simple and easy to use.

[0013] The automatic quick connector assembly of the present invention includes a male end connector and a female end connector for use in pairs, both of which take the plug-in side of the male end connector and the female end connector as the front side, and both the male end connector and the female end connector include a fixed shell with an interface at the rear end, a pair of mounting arms arranged relatively to each other are provided on the fixed shell, a spherical valve core is movably installed between the mounting arms in the front-to-back direction, an elastic retaining structure is installed in the fixed shell to provide an elastic force for the spherical valve core to move forward so as to keep it in the front limit position, a pin groove matching structure is provided between the spherical valve core and the mounting arm body to enable the spherical valve core to achieve forward and backward movement in a rolling posture, a valve core push sleeve is sealed and slidably installed in the fixed shell in the front-to-back direction, and the fixed shell The valve body blocks the valve core push sleeve from the front to prevent it from detaching, and the front end of the valve core push sleeve is retracted and sealed with the front outer surface of the spherical valve core. When the male connector and the female connector are connected, the valve core push sleeves of the two connectors push each other and drive their respective spherical valve cores to move backward to the rear limit position. A valve core channel is provided on the spherical valve core. When the spherical valve core moves to the rear limit position, the spherical valve core rolls to a state where the valve core channel extends forward and backward, and is connected with the valve core push sleeve and the interface front and back, and the male connector and the female connector are connected. When the valve core push sleeve is not subjected to top pressure and the spherical valve core returns to the front limit position, the spherical valve core rolls to a state where the valve core channel and the valve core push sleeve are separated, and the male connector and the female connector are disconnected.

[0014] Furthermore, the opposite sides of the spherical valve core have mutually parallel guide mating surfaces, and the paired mounting arms are fitted with the guide mating surfaces through relative guide walls to determine the rolling axis of the spherical valve core. The pin-groove mating structure includes a rolling guide groove provided on the guide mating surface and a guide pin provided on the guide wall. The rolling guide groove extends radially outward from the center of the guide mating surface. The guide pin is eccentrically arranged relative to the spherical valve core and corresponds to the outer end position of the rolling guide groove, thereby constraining the rolling posture of the spherical valve core through the guide pin and the rolling guide groove.

[0015] Furthermore, the elastic retaining structure includes a valve core retaining sleeve, which is equipped with a retaining spring and whose front end pushes the rear outer surface of the spherical valve core. When the spherical valve core is in the rear limit position, the valve core channel is connected to the interface through the inner hole of the valve core retaining sleeve.

[0016] Furthermore, the retaining spring sleeve is located outside the valve core retaining sleeve to share a space in the front-to-back direction with the valve core retaining sleeve.

[0017] Furthermore, the flow areas of the valve core retaining sleeve, the interface and the valve core channel are equal or close to each other to ensure the flow rate.

[0018] Furthermore, the outer side surface of the mounting arm body is an arc surface on the same circumference, and the valve core pushing sleeve is sleeved on the outer side of the mounting arm body and is guided and matched with the outer side surface of the mounting arm body through the inner circumference.

[0019] Furthermore, a ball recess is provided on the outer surface of the spherical valve core of the male end connector so that when the male end connector is in the front limit position, it faces forward to the female end connector, so that the front end portion of the spherical valve core of the female end connector can be adapted and embedded.

[0020] Furthermore, the outer peripheral surface of the valve core push sleeve of the male end connector has a sealing fitting outer peripheral surface for sealingly fitting with the fixed housing of the female end connector when they are plugged into each other.

[0021] Furthermore, the rolling axes of the spherical valve cores of the male end connector and the female end connector are perpendicular to each other.

[0022] Furthermore, the elastic capacity of the elastic retaining structure in the male end connector is greater than the elastic capacity of the elastic retaining structure in the female end connector, so that when the two are plugged in and connected, the valve core push sleeve of the female end connector is first pushed backward by the valve core push sleeve of the male end connector until the spherical valve core of the female end connector moves to the rear limit position, and then the valve core push sleeve of the female end connector pushes the valve core push sleeve of the male end connector in the opposite direction until the spherical valve core of the male end connector moves to the rear limit position.

[0023] Furthermore, when the male end connector and the female end connector are plugged into the initial position, the fixed housing of the female end connector is in sealing cooperation with the sealing cooperation outer peripheral surface of the valve core push sleeve of the male end connector.

[0024] The present invention provides a new automatic quick connector assembly, which includes two compatible fluid connectors, namely a male connector and a female connector, wherein the spherical valve core of the fluid connector is movably installed in the front-to-back direction and is provided with a retaining structure that provides it with an elastic force to move forward so that it remains in the front limit position. A pin-groove matching structure is also provided between the spherical valve core and the valve core mounting arm. The pin-groove matching structure enables the spherical valve core to roll back and forth around its own diameter during the forward and backward movement relative to the valve core mounting arm, thereby fixing the valve core push sleeve installed in the housing. The front end inward-turned edge thereof is sealed with the front outer surface of the spherical valve core. When the two fluid joints are docked, the valve core push sleeve is pushed by the valve core push sleeve of the adapter joint, driving the spherical valve core to move backward to the rear limit position. A valve core channel is provided on the spherical valve core. When the spherical valve core moves to the rear limit position, the spherical valve core rolls to a state where the valve core channel extends forward and backward, and is connected with the valve core push sleeve and the interface front to back. When the valve core push sleeve is not subjected to top pressure and the spherical valve core returns to the front limit position, the spherical valve core rolls to a state where the valve core channel and the valve core push sleeve are separated. When the two fluid connectors are plugged in and connected to the adapter connector, the valve core pushing sleeve can be pushed backward and drive the spherical valve core to move and roll, thereby realizing the steering of the valve core channel. After the two fluid connectors are connected in place, conduction is achieved at the same time. On the contrary, when the fluid connector and the adapter connector are pulled out and separated, the valve core pushing sleeve is no longer pushed backward, and the elastic retaining structure pushes the spherical valve core to reset forward and roll, thereby realizing the steering of the valve core channel. The two fluid connectors can be disconnected to realize the closing of the internal valve cores of the two connectors, that is, the opening and closing of the internal valve cores of each of the two connectors are realized at the same time when the two fluid connectors are connected and separated. The operation is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the structure of an embodiment of the fluid connector of the present invention; Figure 2 Schematic diagram of the structure of another embodiment of the fluid connector of the present invention; Figure 3 for Figure 1 Schematic diagram of the structure of the spherical valve core; Figure 4 for Figure 1 A cross-sectional view of the spherical valve core; Figure 5 for Figure 1 A schematic diagram of the structure of the spherical valve core being installed on the valve core mounting arm; Figure 6 for Figure 1 Schematic diagram of the structure of the valve core mounting arm; Figure 7 for Figure 2 Schematic diagram of the structure of the valve core mounting arm; Figure 8 for Figure 2 Schematic diagram of the structure of the middle spherical valve core installed on the valve core mounting arm; Figure 9 for Figure 1 Schematic diagram of the spherical valve core in the front limit position; Figure 10 for Figure 1 Schematic diagram of the spherical valve core moving backward and rolling; Figure 11 for Figure 1 Schematic diagram of the spherical valve core in the rear limit position; Figure 12 To include Figure 1 and Figure 2 The structure diagram of the automatic quick connector assembly of the fluid connector shown is in the initial state of connecting two fluid connectors; Figure 13 To include Figure 1 and Figure 2 The structure diagram of the automatic quick connector assembly of the fluid connector shown is in the process of connecting two fluid connectors; Figure 14 To include Figure 1 and Figure 2 The structure diagram of the automatic quick connector assembly of the fluid connector shown is a state in which two fluid connectors are connected.

[0026] In the figure: 10, male end main housing; 100, male end interface; 11, male end sealing sleeve; 110, male end sealing sleeve inner convex ring; 12, male end valve core mounting arm; 120, male end mounting arm fixing seat; 121, male end mounting arm body; 122, male end guide pin; 123, male end guide mating surface; 128, male end guide pin mounting hole; 13, connecting screw sleeve; 14, male end valve core push sleeve; 140, male end push sleeve rear stop ; 141, inner edge of male end push sleeve; 142, inner arc surface of male end push sleeve; 150, male end sealing ring fixing ring; 151, male end sealing ring; 16, male end valve core retaining sleeve; 161, outer edge of male end retaining sleeve; 162, male end retaining spring; 17, male end spherical valve core; 170, male end valve core channel; 171, male end rolling guide groove; 172, ball concave; 173, male end guide wall; 18, male end moving interval; 19. Sealing mating outer peripheral surface; 22. Female valve core mounting arm; 200. Female end interface; 211. Connecting collar; 221. Female end mounting arm body; 222. Female end guide pin; 223. Female end guide mating surface; 228. Female end guide pin mounting hole; 229. Fixing flange; 23. Female end connecting sleeve; 230. Female end connecting sleeve inner collar; 24. Female end valve core push sleeve; 240. Female end push sleeve rear stop edge; 241 , the inner edge of the female end push sleeve; 242, the inner arc surface of the female end push sleeve; 250, the female end sealing ring fixing ring; 251, the female end sealing ring; 26, the female end valve core retaining sleeve; 261, the outer edge of the female end retaining sleeve; 262, the female end retaining spring; 27, the female end spherical valve core; 270, the female end valve core channel; 271, the female end rolling guide groove; 273, the female end guide wall; 28, the female end moving interval; 29, the female end plug-in sealing ring. DETAILED DESCRIPTION

[0027] The features and performance of the present invention are further described in detail below in conjunction with specific embodiments.

[0028] The overall concept of the automatic quick connector assembly of the present invention is: when the two fluid connectors constituting the connector assembly, namely the male connector and the female connector, are plugged in and connected, the spherical valve cores of the two connectors can be pushed against each other and moved backward during the plug-in connection process, and roll during the movement, thereby realizing the steering of the valve core channel. After the two fluid connectors are connected in place, conduction is achieved at the same time. Conversely, when the fluid connector and the adapter connector are pulled out and separated, the spherical valve core is pushed forward by the elastic retaining structure to reset and roll, thereby realizing the steering of the valve core channel. The two fluid connectors can be disconnected to realize the closure of the internal valve cores of the two connectors, that is, the opening and closing of the internal valve cores of each of the two fluid connectors are realized at the same time when the two fluid connectors are connected and separated. The operation is simple and easy to use.

[0029] Based on the above concept, the specific implementation of the automatic quick connector assembly is described in detail below. Among them, the automatic quick connector assembly includes two fluid connectors, namely a male connector and a female structure adapted to the male connector. Then the specific implementation of the automatic quick connector assembly is actually mainly an introduction to the two fluid connectors and their matching methods. For the convenience of explanation, the directions in the following description are first clearly defined. Specifically, the plug-in side of the male connector and the female connector is the front side, that is, the direction of the male connector toward the female connector is the forward direction of the male connector, and the direction of the female connector toward the male connector is the forward direction of the female connector.

[0030] Regarding the male end connector, a specific embodiment is as follows Figure 1 、 4 As shown in Figures 5 and 6, the male end connector includes a male end main shell 10. The male end main shell 10 is a cylindrical structure including a large diameter section and a small diameter section. The large diameter section is in the front and the small diameter section is in the back. The small diameter section is used to connect with the pipeline. The inner hole of the small diameter section constitutes a male end interface 100 for the fluid medium to flow in. A male end valve core mounting arm 12 is installed in the large diameter section. The male end valve core mounting arm 12 includes a cylindrical main body and a male end mounting arm fixing seat 120 at the rear end of the cylindrical main body. The male end mounting arm fixing seat 120 is an external convex ring structure. The rear end face of the male end mounting arm fixing seat 120 is in contact with the step surface of the male end main shell 10. The male end valve core mounting arm 12 also includes a male end mounting arm body 121 at the front end of the cylindrical main body and extending forward along the cylindrical wall of the cylindrical main body. There are two male end mounting arm bodies 121, which are arranged opposite to each other. The male end spherical valve core 17 is installed on the male end mounting arm body 121 and is located between the two opposite male end mounting arm bodies 121.

[0031] The inner circumference of the large-diameter section of the male main housing 10 is provided with an internally threaded section, through which a male sealing sleeve 11 is threadedly mounted. A sealing ring is provided between the male sealing sleeve 11 and the male main housing 10 to achieve a seal between the two. After the male sealing sleeve 11 is connected to the large-diameter section of the male main housing 10, its rear end presses backward against the male mounting arm fixing seat 120, pressing the male mounting arm fixing seat 120 against the stepped surface, thereby achieving a fixed assembly between the male mounting arm and the male main housing 10.

[0032] An annular space is provided between the male end sealing sleeve 11 and the male end mounting arm, in which a male end valve core push sleeve 14 is installed, and the male end valve core push sleeve 14 can move back and forth in the annular space. The inner circumference of the male end valve core push sleeve 14 is adapted and fitted with the outer circumference of the cylindrical body of the male end valve core mounting arm 12 and the outer side surface of the male end mounting arm body 121. At the same time, the rear end of the male end valve core push sleeve 14 is provided with an outwardly protruding male end push sleeve rear stop 140, and the front end of the male end sealing sleeve 11 is provided with an inwardly protruding inner convex ring of the male end sealing sleeve 11. In this way, the male end valve core push sleeve 14 is fixedly connected to the male end main housing 10 and the inner convex ring of the male end sealing sleeve 11 blocks the male end push sleeve rear stop 140 in the forward direction, thereby preventing the male end valve core push sleeve 14 from falling off at the front side. The male end sealing sleeve 11 also achieves a sliding seal with the male end valve core push sleeve 14 by sealingly cooperating with the inner convex ring of the male end sealing sleeve 11 and the outer peripheral surface of the male end push sleeve. It can be seen that the male end sealing sleeve 11 simultaneously achieves a seal with the male end main housing 10 and the male end valve core push sleeve 14.

[0033] The male end main housing 10, the male end sealing sleeve 11 and the male end valve core mounting arm 12 of the male end connector together constitute a fixed housing of the male end connector.

[0034] The male end spherical valve core 17 is mounted on two male end mounting arms 121. Flat surfaces are machined on the male end spherical valve core 17 at positions corresponding to the two male end mounting arms 121. The line connecting the two flat surfaces passes through the diameter of the male end spherical valve core 17, and the extension direction of this diameter is the parallel direction of the two male end mounting arms 121. Correspondingly, the opposing sides of the two male end mounting arms 121 also have flat surfaces, and the flat surfaces on the two male end mounting arms 121 are parallel to each other.

[0035] Male tumbling guide grooves 171 are defined on two flat surfaces of the male spherical valve core 17. These grooves are straight grooves extending radially outward from the center of the flat surfaces and extending through the spherical valve core 17. The straight grooves on the two flat surfaces of the male spherical valve core 17 overlap along the line connecting the two flat surfaces. Accordingly, male guide pin mounting holes 128 are defined on the circumferential edges of the two male mounting arms 121. Male guide pins 122 are mounted within these holes. These pins extend inward of the male mounting arms 121 and into the male tumbling guide grooves 171. The male end guide pin 122 and the male end rolling guide groove 171 together constitute a pin-groove matching structure. The pin-groove matching structure enables the male end spherical valve core 17 to roll in the fore-and-aft direction due to the mutual constraint between the male end rolling guide groove 171 and the male end guide pin 122 when it moves in the fore-and-aft direction, that is, to roll around the diameter of two planes perpendicular to the male end spherical valve core 17. The two mutually parallel planes on the male end spherical valve core 17 are referred to as the male end guide matching surfaces 123, and the planes on the opposite sides of the two male end mounting arms 121 are referred to as the male end guide wall surfaces 173. The male end guide wall surfaces 173 fit the male end guide matching surfaces 123 to ensure that the extension direction of the rolling axis of the male end spherical valve core 17 does not change, that is, the rolling posture of the male end spherical valve core 17 is constrained.

[0036] A male end valve core channel 170 is opened in the male end spherical valve core 17. The male end valve core channel 170 is parallel to the two planes of the male end spherical valve core 17, that is, parallel to the male end mounting arm body 121. When the male end spherical valve core 17 rolls back and forth, the direction of the male end valve core channel 170 can be changed.

[0037] An elastic retaining structure is also installed in the male end fixed shell to provide an elastic force to the male end spherical valve core 17 forward to keep it at the front limit position. Specifically, the elastic retaining structure includes a male end valve core retaining sleeve 16, and the male end valve core retaining sleeve 16 includes a cylindrical male end retaining sleeve body. The rear end of the male end retaining sleeve body extends into the small diameter section of the male end main shell 10 and slides with the inner wall surface of the small diameter section. The front end of the male end retaining sleeve body extends into the cylindrical main body of the male end valve core mounting arm 12. The front end of the male end retaining sleeve body is provided with a male end retaining sleeve outward turning edge 161, and the front side surface of the male end retaining sleeve outward turning edge is provided with a male end retaining sleeve outward turning edge 161. The outer surface of 17 is adapted to the annular arc surface, and the outer side of the male end retaining sleeve is covered with a male end retaining spring 162. The male end retaining spring 162 is a compression spring, and the rear end is against the male end main shell 10, and the front end is against the outer edge of the male end retaining sleeve. The male end retaining spring 162 provides an elastic force for the male end retaining sleeve to move forward, so that the front end of the male end valve core retaining sleeve 16 pushes the rear outer surface of the male end spherical valve core 17, and keeps the male end spherical valve core 17 in the front limit position in a natural state.

[0038] The front limit position of the male end spherical valve core 17 is determined by the male end valve core push sleeve 14. The front end of the male end valve core push sleeve 14 is provided with an inward-retracting structure, and the inward-retracting structure is used to seal and cooperate with the front outer surface of the male end spherical valve core 17. Specifically, the inward-retracting structure includes an inward-turned edge 141 of the male end push sleeve provided at the front end of the male end valve core push sleeve 14, and a male end sealing ring 151 provided at the inward-turned edge 141 of the male end push sleeve. A male end sealing ring fixing ring 150 is fixedly installed on the rear side of the inward-turned edge 141 of the male end push sleeve, and the male end sealing ring 151 is clamped between the male end sealing ring fixing ring 150 and the inward-turned edge 141 of the male end push sleeve. The inner side of the male end sealing ring 151 is in a sealed fit with the front outer surface of the male end spherical valve core 17. In order to improve the sealing effect at this location, the rear side surface of the inverted edge 141 of the male end push sleeve has an annular male end push sleeve inner arc surface 142 that is adapted to the outer surface shape of the male end spherical valve core 17 to better fit the outer surface of the male end spherical valve core 17. Since the male end valve core push sleeve 14 is constrained by the male end sealing sleeve 11 and has the ability to move to the front end limit position, the male end spherical valve core 17 can, under the action of the elastic retaining structure on its rear side, push the male end valve core push sleeve 14 forward in a natural state until the male end valve core push sleeve 14 is in the front end limit position. At this time, the male end spherical valve core 17 is in the front end limit position. There is a certain gap between the inward portion of the male end valve core push sleeve 14 and the front end of the male end mounting arm body 121. This gap is the male end movement gap 18, which allows the male end valve core push sleeve 14 to move back and forth relative to the male end main housing 10 to avoid interference.

[0039] When the male end spherical valve core 17 is in the front limit position, the male end valve core channel 170 is in a posture roughly perpendicular to the front and rear directions. At this time, the male end sealing ring 151 is sealed and fitted with the front outer surface of the male end spherical valve core 17 over the entire circumference, and the male end interface 100 is connected to the inner cavity of the male end valve core push sleeve 14, but is not connected to the valve core channel, and the male end connector is in a closed state.

[0040] During the backward movement of the male end valve core push sleeve 14, the inward-retracting structure can push the male end spherical valve core 17 to overcome the elastic force of the elastic retaining structure and move backward. As described above, due to the existence of the pin-groove matching structure, the male end spherical valve core 17 moves backward in a rolling manner. During this process, the direction of the male end valve core channel 170 changes. When the male end spherical valve core 17 is in the rear limit position, the male end valve core channel 170 is in a posture of extending forward and backward. At this time, the male end interface 100 and the inner cavity of the male end valve core retaining sleeve 16, the male end valve core channel 170 and the inner hole of the inner inverted edge 141 of the male end push sleeve are connected front to back, and the male end connector is in a conductive state.

[0041] In order to avoid a significant decrease in flow at the male end joint, the flow areas of the male end valve core retaining sleeve 16, the male end interface 100, the inner hole of the male end push sleeve inward edge 141 and the male end valve core channel 170 are equal or close to ensure the flow rate.

[0042] The outer side surface of the large diameter section of the male end main housing 10 is rotatably mounted with a connecting screw sleeve 13 around its axis. The connecting screw sleeve 13 is axially anti-detachably connected to the male end main housing 10 and is used to connect to the female end connecting sleeve 23 on the female end connector.

[0043] Regarding the female end connector, a specific embodiment is as follows Figure 2 、 3 As shown in Figures 7 and 8, the female end connector includes a female end main housing, which as a whole constitutes a female end valve core mounting arm 22. The female end main housing includes a cylindrical body, and the rear end of the cylindrical body has an inner convex ring. The inner hole of the inner convex ring constitutes a female end interface 200 for connecting to a fluid pipeline for fluid medium to flow in. The female end valve core mounting arm 22 also includes a female end mounting arm fixing seat at the rear end of the cylindrical body, and the female end mounting arm fixing seat is a fixed flange 229. The female end valve core mounting arm 22 also includes a female end mounting arm body 221 extending forward from the front end of the cylindrical body. There are two female end mounting arm bodies 221, which are arranged opposite to each other. The female end spherical valve core 27 is mounted on the female end mounting arm body 221 and is located between the two opposite female end mounting arm bodies 221. The female end main housing and the female end connecting sleeve 23 constitute the fixed housing of the female end connector.

[0044] The outer side of the cylindrical body is provided with an external thread section, and a female end connecting sleeve 23 is connected through the external thread section. The front end of the female end connecting sleeve 23 has an external thread section for threaded connection with the connecting screw sleeve 13 of the male end connector. There is a radial gap between the female end connecting sleeve 23 and the female end mounting arm 221. A female end valve core push sleeve 24 is installed in this radial gap. The inner circumference of the female end valve core push sleeve 24 is adapted and fits with the outer circumference of the female end mounting arm 221, and the female end valve core push sleeve 24 can be guided and slid in the front and back directions. The front end of the female end connecting sleeve 23 is provided with a female end connecting sleeve inner convex ring 230, and the rear end of the female end valve core push sleeve 24 is provided with an outwardly protruding female end push sleeve rear stop 240. In this way, the female end connecting sleeve inner convex ring 230 blocks the female end push sleeve rear stop 240 in the forward direction, thereby preventing the female end valve core push sleeve 24 from falling off at the front side. Two or more sealing rings are provided on the inner convex ring 230 of the female end connecting sleeve, and the sealing ring on the rear side is sealed with the outer peripheral surface of the female end push sleeve, thereby realizing a sliding seal with the female end valve core push sleeve 24.

[0045] The female end spherical valve core 27 is mounted on two female end mounting arms 221. Flat surfaces are machined on the female end spherical valve core 27 at locations corresponding to the two female end mounting arms 221. The line connecting the two flat surfaces passes through the diameter of the female end spherical valve core 27, and the direction in which this diameter extends is the parallel direction of the two female end mounting arms 221. Accordingly, the opposing sides of the two female end mounting arms 221 also have flat surfaces, and the flat surfaces on the two female end mounting arms 221 are parallel to each other.

[0046] Female tumbling guide grooves 271 are defined on two flat surfaces of the female spherical valve core 27. These grooves are straight grooves extending radially outward from the center of the flat surfaces and extending through them. The straight grooves on the two flat surfaces of the female spherical valve core 27 overlap along the line connecting the two flat surfaces. Accordingly, female guide pin mounting holes 228 are defined on the circumferential edges of the two female mounting arms 221. Female guide pins 222 are mounted within these holes. These pins extend inward of the female mounting arms 221 and into the female tumbling guide grooves 271. The female end guide pin 222 and the female end rolling guide groove 271 together constitute a pin-groove matching structure. This pin-groove matching structure enables the female end spherical valve core 27 to roll in the fore-and-aft direction due to the mutual constraint between the female end rolling guide groove 271 and the female end guide pin 222 when it moves in the fore-and-aft direction. That is, it rolls around the diameter of two planes perpendicular to the female end spherical valve core 27. The two mutually parallel planes on the female end spherical valve core 27 are referred to as the female end guide matching surfaces 223, and the planes on the opposite sides of the two female end mounting arms 221 are referred to as the female end guide wall surfaces 273. The female end guide wall surfaces 273 fit the female end guide matching surfaces 223 to ensure that the extension direction of the rolling axis of the female end spherical valve core 27 does not change, thereby constraining the rolling posture of the female end spherical valve core 27.

[0047] A female end valve core channel 270 is provided in the female end spherical valve core 27. The female end valve core channel 270 is parallel to the two planes of the female end spherical valve core 27, that is, parallel to the female end mounting arm 221. When the female end spherical valve core 27 rolls back and forth, the direction of the female end valve core channel 270 can be changed.

[0048] The female end fixed housing also houses an elastic retaining structure that applies an elastic force to the female end spherical valve core 27 to maintain it in its front limit position. Specifically, the elastic retaining structure comprises a female end valve core retaining sleeve 26, which comprises a cylindrical female end retaining sleeve body. The female end retaining sleeve body is entirely located within the female end main housing. The front end of the female end retaining sleeve body is provided with a female end retaining sleeve outward flange 261. The outer side surface of the female end retaining sleeve outward flange 261 is adapted and fitted with the inner side surface of the female end mounting arm 221, thereby achieving guided movement of the female end retaining sleeve in the front-to-back direction. The front side surface of the outer eversion edge of the female end retaining sleeve is provided with an annular arc surface adapted to the outer surface of the female end spherical valve core 27. The outer side of the female end retaining sleeve is covered with a female end retaining spring 262. The female end retaining spring 262 is a compression spring, and the rear end is abutted against the inner convex ring of the female end main shell, and the front end is abutted against the outer eversion edge of the female end retaining sleeve. The female end retaining spring 262 provides an elastic force for the female end retaining sleeve to move forward, so that the front end of the female end valve core retaining sleeve 26 pushes the rear outer surface of the female end spherical valve core 27, and keeps the female end spherical valve core 27 in the front limit position in a natural state.

[0049] The front limit position of the female end spherical valve core 27 is determined by the female end valve core push sleeve 24. The front end of the female end valve core push sleeve 24 is provided with an inward-retracting structure, and the inward-retracting structure is used to seal and cooperate with the front outer surface of the female end spherical valve core 27. Specifically, the inward-retracting structure includes an inward-turned edge 241 of the female end push sleeve provided at the front end of the female end valve core push sleeve 24, and a female end sealing ring 251 provided at the inward-turned edge 241 of the female end push sleeve. A female end sealing ring fixing ring 250 is fixedly installed on the rear side of the inward-turned edge 241 of the female end push sleeve, and the female end sealing ring 251 is sandwiched between the female end sealing ring fixing ring 250 and the inward-turned edge 241 of the female end push sleeve. The inner side of the female end sealing ring 251 is in a sealed fit with the front outer surface of the female end spherical valve core 27. In order to improve the sealing effect at this location, the rear side surface of the inner edge 241 of the female end push sleeve has an annular female end push sleeve inner arc surface 242 that is adapted to the outer surface shape of the female end spherical valve core 27, so as to better fit the outer surface of the female end spherical valve core 27. Part of the female end spherical valve core 27 is exposed from the inner hole of the inner edge 241 of the female end push sleeve and protrudes from the front end surface of the female end push sleeve. Since the female end valve core push sleeve 24 is constrained by the female end sealing sleeve body and has the function of moving to the front end limit position, the female end spherical valve core 27 can push the female end valve core push sleeve 24 forward in a natural state under the action of the elastic retaining structure on its rear side until the female end valve core push sleeve 24 is in the front end limit position, at which time the female end spherical valve core 27 is in the front end limit position. There is a certain gap between the retracted part of the female end valve core push sleeve 24 and the front end of the female end mounting arm 221, which is the female end moving gap 28, so that the female end valve core push sleeve 24 can move forward and backward relative to the female end main housing to avoid interference.

[0050] The front end face of the female valve core push sleeve 24 is also on the rear side of the front end face of the female connecting sleeve 23, that is, the female valve core push sleeve 24 is sunken within the front end face of the female connecting sleeve 23. The sunken space is used for the male valve core push sleeve 14 to extend into and resist against the female valve core push sleeve 24 when the male joint and the female joint are connected. Moreover, the outer peripheral surface of the male valve core push sleeve 14 has a sealing fitting outer peripheral surface 19 for sealing with the female connecting sleeve 23. When the male valve core push sleeve 14 enters the sunken space, the sealing ring on the inner convex ring 230 of the female connecting sleeve is sealed with the sealing fitting outer peripheral surface 19 on the male valve core push sleeve 14 to achieve sealing when the male joint and the female joint are connected in the initial position, which is conducive to achieving better sealing during the entire connection process of the male joint and the female joint.

[0051] When the female end spherical valve core 27 is in the front limit position, the female end valve core channel 270 is in a posture roughly perpendicular to the front and rear directions. At this time, the female end sealing ring 251 is sealed and fitted with the front outer surface of the female end spherical valve core 27 over the entire circumference, and the female end interface 200 is connected to the inner cavity of the female end valve core push sleeve 24, but is not connected to the valve core channel, and the female end connector is in a closed state.

[0052] During the backward movement of the female end valve core push sleeve 24, the female end spherical valve core 27 can be pushed by the inward-retracting structure to overcome the elastic force of the elastic retaining structure and move backward. As described above, due to the existence of the pin-groove matching structure, the female end spherical valve core 27 moves backward in a rolling manner. During this process, the direction of the female end valve core channel 270 changes. When the female end spherical valve core 27 is in the rear limit position, the female end valve core channel 270 is in a posture of extending forward and backward. At this time, the female end interface 200 and the inner cavity of the female end valve core push sleeve 24, the female end valve core channel 270 and the inner hole of the inner folded edge 241 of the female end push sleeve are connected front to back, and the female end connector is in a conductive state.

[0053] To avoid a significant drop in flow at the female connector, the female valve core retaining sleeve 26, the female interface 200, the inner hole of the female push sleeve inward edge 241, and the female valve core passage 270 have equal or similar flow areas to ensure flow. Furthermore, to avoid a significant drop in flow when the fluid medium flows between the male and female connectors, the flow areas of the female valve core passage 270 and the male valve core passage 170 are equal or similar.

[0054] The automatic quick connector assembly of the present invention includes a male end connector and a female end connector. The connection process of the male end connector and the female end connector can refer to Figure 9-14 ,in Figure 12-14 The three typical states of the male and female connectors during the connection process are fully displayed. Since the process of disconnecting the male and female connectors is the opposite of the connection process, you can refer to it in reverse order. Figure 14-12, no further description will be given.

[0055] The connection process of the male and female connectors: When the male end connector and the female end connector are initially plugged in, the male end valve core push sleeve 14 extends into the female end connecting sleeve 23 and is in perfect contact with the end face of the female end valve core push sleeve 24. The male end connecting screw sleeve 13 and the female end connecting sleeve 23 are in a position where the threads are about to be screwed together. The outer peripheral surface of the male end valve core push sleeve 14 is sealed with the female end connecting sleeve 23. The male end spherical valve core 17 and the female end spherical valve core 27 are both in the front limit position, that is, both connectors are in a closed state. As described above, since the female end ball valve core 27 has a portion protruding from the front end surface of the female end valve core push sleeve 24, in order to achieve the end surface fit between the male end valve core push sleeve 14 and the female end valve core push sleeve 24, and to prevent interference between the male end ball valve core 17 and the female end ball valve core 27, a ball recess 172 is provided on the male end ball valve core 17 to accommodate the portion of the female end ball valve core 27 protruding from the front end surface of the female end valve core push sleeve 24 in this state. This arrangement can prevent a large gap between the male end connector and the female end connector at the beginning of connection and in the connected state, and prevent leakage of the fluid medium when the two connectors are separated.

[0056] In the embodiment shown in the figure, the rolling axes of the spherical valve cores of the male end connector and the female end connector are perpendicular to each other, so that the sealing can be better ensured when the two connectors are in the closed state. Of course, in other embodiments, the rolling axes of the spherical valve cores of the male end connector and the female end connector may not be perpendicular but at a certain angle, or in other embodiments, the rolling axes of the spherical valve cores of the work order connector and the female end connector may be parallel.

[0057] Afterwards, the male end connecting sleeve 13 is screwed, the male end fixed shell and the female end fixed shell are close to each other, the male end valve core pushing sleeve 14 and the female end valve core pushing sleeve 24 push each other backward, and drive their corresponding spherical valve cores to roll backward, realizing the direction change of the valve core channel, until the male end spherical valve core 17 and the female end spherical valve core 27 both move from the front limit position to the rear limit position, the valve core channels are in the front and rear extension direction, the male end connector and the female end connector are both in the open state, and the male end connector and the female end connector are completed.

[0058] In the embodiment shown in the figure, the elastic capacity of the elastic retaining structure in the male end connector is greater than the elastic capacity of the elastic retaining structure in the female end connector, so that when the two are plugged in and connected, the valve core push sleeve of the female end connector is first pushed backward by the valve core push sleeve of the male end connector until the spherical valve core of the female end connector moves to the rear limit position, and then the valve core push sleeve of the female end connector pushes the valve core push sleeve of the male end connector in the opposite direction until the spherical valve core of the male end connector moves to the rear limit position. In this way, the two spherical valve cores can be opened or closed in sequence during the connection or separation process of the two connectors, ensuring the sealing and leak-proof performance during the connection and separation process. Of course, in other embodiments, the elastic capacity of the elastic retaining joints of the two connectors can be equal, so that the two spherical valve cores can roll roughly synchronously during the connection or separation process of the two connectors, and the opening or closing of the two connectors can be achieved roughly at the same time, so as to increase the speed of opening and closing.

[0059] In a specific embodiment of the present invention, Figure 2 and 14 As shown, a connection-in-place convex ring 211 is also provided on the outer peripheral surface of the female end connecting sleeve 23, so that when the male end valve core and the female end valve core are both in the rear limit position, the end of the male end connecting screw sleeve 13 is abutted against the connection-in-place convex ring 211 on the female end connecting sleeve 23 to avoid excessive connection.

[0060] In the above-mentioned specific embodiment of the present invention, the connection between the male end connector and the female end connector is achieved by means of the male end connecting sleeve 13 and the female end connecting sleeve 23. This connection method is an existing connection method, which is similar to the connection method of the connector disclosed in the invention patent application with application publication number CN103346431A. Of course, in other embodiments for realizing the connection between the male end connector and the female end connector, the connection method of the connector disclosed in the utility model patent with authorization announcement number CN205051114U can also be adopted; or alternatively, the connection method of the connector disclosed in the invention patent application with application publication number CN110212369A can also be adopted.

[0061] In the above specific implementation manner, regardless of whether it is a male end connector or a female end connector, the guide pin of the pin-groove matching structure is arranged on the mounting arm body, and the rolling guide groove is arranged on the spherical valve core. In another embodiment of the pin-groove matching structure, the rolling guide groove is arranged on the mounting arm body, and the guide pin is arranged on the spherical valve core. At this time, the guide pin is eccentrically arranged on the guide matching surface, and the rolling guide groove is an arc groove arranged around the rolling axis, and the guide pin extends into the arc groove.

[0062] In the above specific embodiments, regardless of whether it is a male end connector or a female end connector, the elastic retaining structure includes a valve core retaining sleeve and a retaining spring. The retaining spring is sleeved on the outside of the valve core retaining sleeve to jointly utilize part of the axial space. In some other embodiments, the retaining spring and the valve core retaining sleeve can be arranged axially, that is, one end of the retaining spring presses against the fixed shell, and the other end presses against the rear end of the valve core retaining sleeve, so that the radial dimension of the elastic retaining structure can be reduced.

[0063] In addition, in the different embodiments introduced above, the elastic retaining structure includes two components: a valve core retaining sleeve and a retaining spring. In other embodiments of the elastic retaining structure, the elastic retaining structure can also be a cylindrical coil spring or a conical coil spring. One end of the coil spring is pressed against the fixed shell, and the other end is directly mortgaged to the surface of the spherical valve core.

[0064] In the above-mentioned specific embodiment, the retraction structure of the valve core push sleeve includes an inward-turned edge of the push sleeve arranged at the front end of the valve core push sleeve, a sealing ring arranged on the rear side of the inward-turned edge of the push sleeve, and a sealing ring fixing ring for pressing the sealing ring onto the inward-turned edge of the push sleeve. In another different embodiment, the retraction structure of the valve core push sleeve includes an inward-turned edge of the push sleeve, and a sealing ring mounting groove is provided on the inner ring surface of the inward-turned edge of the push sleeve that cooperates with the spherical valve core. The sealing ring is installed at this position, so that the structure is simpler.

[0065] In the above-mentioned specific embodiment, a front end portion of the female end spherical valve core 27 protrudes from the female end valve core push sleeve 24, while the male end spherical valve core 17 does not protrude from the male end valve core push sleeve 14 because of the provision of the ball recess 172. In other embodiments, the thickness of the inner fold edge of the valve core push sleeve can be set larger so that the male end spherical valve core 17 no longer has the ball recess 172, and neither the male end spherical valve core 17 nor the female end spherical valve core 27 protrudes from the front end surface of the corresponding valve core push sleeve.

[0066] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall be included in the scope of protection of the present invention.

Claims

1. A fluid connector, characterized in that: The spherical valve core is movably mounted between the mounting arms in the front and rear directions; an elastic retaining structure is installed in the fixed housing to provide an elastic force for the spherical valve core to move forward so as to keep it in the front limit position; a pin-groove matching structure is provided between the spherical valve core and the mounting arm to enable the spherical valve core to move forward and backward in a rolling posture; a valve core push sleeve is sealed and slidably mounted in the fixed housing in the front and rear directions; the fixed housing blocks the valve core push sleeve from the front side to prevent it from being pushed forward When the spherical valve core is disengaged, the front end of the valve core push sleeve is retracted and sealed with the front outer surface of the spherical valve core, and is used to drive the spherical valve core to move backward to the rear limit position under the push of the valve core push sleeve of the adapter joint when docking with the adapter joint. A valve core channel is provided on the spherical valve core. When the spherical valve core moves to the rear limit position, the spherical valve core rolls to a state where the valve core channel extends front and back, and is connected with the valve core push sleeve and the interface front and back. When the valve core push sleeve is not subjected to top pressure and the spherical valve core returns to the front limit position, the spherical valve core rolls to a state where the valve core channel and the valve core push sleeve are separated.

2. The fluid connector according to claim 1, wherein the spherical The opposite sides of the valve core have mutually parallel guide mating surfaces, and the paired mounting arms are fitted with the guide mating surfaces through the relative guide walls to determine the rolling axis of the spherical valve core. The pin-groove mating structure includes a rolling guide groove provided on the guide mating surface and a guide pin provided on the guide wall. The rolling guide groove extends radially outward from the center of the guide mating surface. The guide pin is eccentrically arranged relative to the spherical valve core and corresponds to the outer end position of the rolling guide groove, thereby constraining the rolling posture of the spherical valve core through the guide pin and the rolling guide groove.

3. The fluid connector according to claim 1, wherein: The elastic retaining structure includes a valve core retaining sleeve, which is equipped with a retaining spring and has a front end that pushes the rear outer surface of the spherical valve core. When the spherical valve core is in the rear limit position, the valve core channel is connected to the interface through the inner hole of the valve core retaining sleeve.

4. The fluid connector according to claim 3, wherein: The retaining spring is sleeved on the outer side of the valve core retaining sleeve to share a space in a front-to-rear direction with the valve core retaining sleeve.

5. The fluid connector according to claim 3, wherein: The flow areas of the valve core retaining sleeve, the interface and the valve core channel are equal or close to ensure the flow rate.

6. The fluid connector according to any one of claims 1 to 5, characterized in that: The outer side surface of the mounting arm body is an arc surface on the same circumference. The valve core pushing sleeve is sleeved on the outer side of the mounting arm body and is guided and matched with the outer side surface of the mounting arm body through the inner circumference.

7. The fluid connector according to any one of claims 1 to 5, characterized in that: A ball recess (172) is provided on the outer surface of the spherical valve core so as to face the adapter forward when the spherical valve core is in the front limit position and to accommodate the front end portion of the spherical valve core of the adapter.

8. The fluid connector according to any one of claims 1 to 5, characterized in that: The outer peripheral surface of the valve core push sleeve has a sealing matching outer peripheral surface (19) for sealingly matching with the fixed housing of the adapter when they are plugged into each other.

9. Automatic quick connector assembly, characterized by: It comprises a male end connector and a female end connector for use in pairs, wherein the male end connector is the fluid connector according to any one of claims 1 to 8, and the female end connector is the fluid connector according to any one of claims 1 to 6.

10. The automatic quick connector assembly according to claim 9, wherein: The rolling axes of the spherical valve cores of the male end connector and the female end connector are perpendicular to each other.

11. The automatic quick connector assembly according to claim 9, wherein: The elastic capacity of the elastic retaining structure in the male end connector is greater than that of the elastic retaining structure in the female end connector, so that when the two are plugged in and connected, the valve core push sleeve of the female end connector is first pushed backward by the valve core push sleeve of the male end connector until the spherical valve core of the female end connector moves to the rear limit position, and then the valve core push sleeve of the female end connector pushes the valve core push sleeve of the male end connector in the opposite direction until the spherical valve core of the male end connector moves to the rear limit position.

12. The automatic quick connector assembly according to claim 9, wherein: When the male end connector and the female end connector are plugged into the initial position, the fixed housing of the female end connector is in sealing engagement with the sealing engagement outer peripheral surface (19) on the valve core push sleeve of the male end connector.

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