Dry separation oil-gas coupling valve

Abstract

The present application relates to oil-gas coupling valve, specifically relates to a kind of dry separation oil-gas coupling valve, including shell assembly, valve core assembly, valve seat assembly and sealing assembly, the cavity is formed in the inside of the shell assembly, the valve core assembly, valve seat assembly and sealing assembly are all arranged in the cavity, the valve seat assembly includes valve seat body, the sealing assembly is fixed on the valve seat body, and the valve seat body can be moved up and down relative to the shell assembly;One end of the valve core assembly passes through the valve seat body, and can be moved up and down relative to the shell assembly.The dry separation oil-gas coupling valve of the present application is optimized and designed by structure, so that in the process of loading, parking and opening and closing stage, oil-gas coupling valve all-around no oil-gas leakage, ensure the reliability of oil-gas coupling valve and oil-gas recovery joint connection.

Description

TECHNICAL FIELD

[0001] The present application relates to an oil-gas coupling valve, in particular to a dry separation oil-gas coupling valve. BACKGROUND

[0002] The statements herein are provided only to complement the background of the present disclosure and are not necessarily prior art.

[0003] The oil-gas coupling valve is mainly used for quick connection and connection between the crane pipe and the tank truck in the bottom sealed loading and unloading system of hazardous chemicals (oil products, chemical products) and the like, so as to realize the recovery of hazardous gas in the tank truck and the pipeline, and there is no hazardous gas leakage when it is disconnected, which is an important equipment in the hazardous gas recovery link.

[0004] Before the loading and unloading operation of the tank truck, the oil-gas coupling valve on the oil depot crane pipe is connected with the oil-gas recovery connector on the tank truck. The existing oil-gas coupling valve is composed of a valve shell and a valve core. The sealing ring connected with the oil-gas recovery connector is fixed on the valve shell, and the sealing gasket on the valve core is a fixed rubber, which has a small compression amount and cannot compensate the distance. The sealing gasket is in the oil-gas environment for a long time, and the sealing performance is poor due to the shrinkage of the sealing gasket. The installation groove is shallow, the sealing gasket is easy to fall off, and there is a safety hazard of oil-gas leakage, which cannot guarantee the reliability of the connection between the oil-gas coupling valve and the oil-gas recovery connector.

[0005] Therefore, how to design a dry separation oil-gas coupling valve, so that the oil-gas coupling valve is free of oil-gas leakage in all directions during the loading process, parking and opening and closing stages, and the connection is reliable is a problem to be solved by the person skilled in the art at present. SUMMARY

[0006] In order to solve the problems existing in the prior art, the present application provides a dry separation oil-gas coupling valve, which is optimized in structure, so that the oil-gas coupling valve is free of oil-gas leakage in all directions during the loading process, parking and opening and closing stages, and the reliability of the connection between the oil-gas coupling valve and the oil-gas recovery connector is guaranteed.

[0007] The technical scheme of the present application is as follows:

[0008] The present application provides a dry separation oil-gas coupling valve, which comprises a shell assembly, a valve core assembly, a valve seat assembly and a sealing assembly. The shell assembly forms a cavity inside. The valve core assembly, the valve seat assembly and the sealing assembly are all arranged in the cavity. The valve seat assembly comprises a valve seat body. The sealing assembly is fixed on the valve seat body, and the valve seat body can move up and down relative to the shell assembly. One end of the valve core assembly passes through the valve seat body and can move up and down relative to the shell assembly.

[0009] Further, the sealing assembly comprises a first sealing ring arranged in a first sealing groove opened on the top of the valve seat body, for sealing the valve seat body and the valve core assembly; and a second sealing ring arranged in a second sealing groove opened on the sidewall of the valve seat body, for sealing the valve seat body and the shell assembly.

[0010] Further, the shell assembly comprises a valve shell, a sleeve arranged outside the valve shell, a third elastic member arranged between the sleeve and the valve shell to enable the sleeve to move up and down relative to the valve shell, the valve core assembly, the valve seat assembly and the sealing assembly being located in the valve shell, the valve seat assembly further comprising a second elastic member, and a step structure formed in the shell assembly for placing the valve seat assembly, the second elastic member being arranged between the valve seat body and the step structure.

[0011] The valve seat assembly further comprises a movable sleeve and a first elastic member arranged between the movable sleeve and the valve seat body.

[0012] Further, the oil-gas coupling valve further comprises a linkage structure for enabling the sleeve and the movable sleeve to realize linkage action, the linkage structure comprising a mounting groove opened on the sidewall of the valve shell, a rolling connecting part arranged in the mounting groove, a limiting sunken part opened on the movable sleeve, and a clamping groove opened on the inner wall of the sleeve, one end of the rolling connecting part being selectively connected with the limiting sunken part, and the other end being selectively connected with the clamping groove. The connection action is that when the movable sleeve is connected with the linkage structure, the sleeve is reset, and when the sleeve is opened, the movable sleeve is reset.

[0013] Further, the rolling connecting part is provided as one or more first rolling balls.

[0014] Further, the second elastic member is provided as a wave spring, and the first elastic member and the third elastic member are provided as outer guide columns with telescopic function.

[0015] Further, the oil-gas coupling valve further comprises a pull rod assembly, one end of the pull rod assembly being connected with the sleeve, and the other end being connected with the third elastic member, so that when the pull rod assembly is pulled, the third elastic member is pressed to drive the sleeve to move downward.

[0016] Further, the side wall of the valve housing is provided with a plurality of mounting holes in the circumferential direction, a second ball is arranged in the mounting hole, the cross section of the mounting hole is large outside and small inside, so that part of the spherical structure of the second ball enters the cavity of the valve housing; a first limiting wall for limiting the position of the second ball is arranged on the inner side of the sleeve side wall in the circumferential direction, a second limiting wall above the first limiting wall is arranged to prevent the second ball from rolling out of the mounting hole, the diameter of the second limiting wall is larger than that of the first limiting wall, and the clamping groove is located below the first limiting wall.

[0017] Further, the valve core assembly includes a valve core, a main shaft assembly and a handle; the top end of the valve core is in sealing connection with the valve seat, the bottom end of the valve core is connected with one end of the main shaft assembly, the other end of the main shaft assembly is connected with the handle, and the handle is located outside the valve housing.

[0018] Further, the main shaft assembly includes a main shaft, a main shaft sleeve arranged on the main shaft and a V-shaped connecting plate hinged to the main shaft sleeve, the V-shaped connecting plate is hinged to the valve core, the main shaft is connected with the handle, and the main shaft sleeve is arranged in a cam shape and located at the center position of the cavity of the valve housing.

[0019] The present application has the following beneficial effects:

[0020] The oil-gas coupling valve of the present application is a dry separation type, which comprises a housing assembly, a valve core assembly, a valve seat assembly and a sealing assembly. The housing assembly forms a cavity inside, and the valve core assembly, the valve seat assembly and the sealing assembly are arranged in the cavity. The valve seat assembly comprises a valve seat body, and the sealing assembly is fixed on the valve seat body. The valve core assembly is connected with one end of the valve seat body and can move up and down relative to the housing assembly. Through the optimized design of the structure, the oil-gas coupling valve can be used without oil and gas leakage in the stages of loading, parking, opening and closing, and the reliability of the connection between the oil-gas coupling valve and the oil-gas recovery joint is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is the overall structure schematic diagram of an embodiment of the oil-gas coupling valve of the present application.

[0022] Figure 2 is the overall structure sectional view schematic diagram of an embodiment of the oil-gas coupling valve of the present application.

[0023] Figure 3 is Figure 2 is the structure schematic diagram of A in the figure.

[0024] Figure 4 is Figure 2 is the structure schematic diagram of B in the figure.

[0025] Figure 5 Figure 5 is a schematic view of a connection structure of an embodiment of the oil-gas coupling valve of the present application.

[0026] Figure 6 Figure 6 is a schematic view of a partial structure of the oil-gas coupling valve after the sleeve is reset of an embodiment of the oil-gas coupling valve of the present application.

[0027] Figure 7 Figure 7 is a schematic view of a partial structure of the oil-gas coupling valve after the sleeve is pressed down of an embodiment of the oil-gas coupling valve of the present application.

[0028] Figure 8 Figure 8 is a schematic view of an assembly of an embodiment of the oil-gas coupling valve of the present application and a tanker oil-gas recovery connector before being connected.

[0029] Figure 9 Figure 9 is a schematic view of a structure of an embodiment of the oil-gas coupling valve of the present application and a tanker oil-gas recovery connector in a butting state.

[0030] Figure 10 Figure 10 is a schematic view of a structure of an embodiment of the oil-gas coupling valve of the present application and a tanker oil-gas recovery connector in an open state after being connected.

[0031] In the figures, 100 is a housing assembly; 110 is a valve housing; 111 is a step structure; 112 is a mounting groove; 113 is a mounting hole; 120 is a sleeve; 121 is a clamping groove; 122 is a first limiting wall; 123 is a second limiting wall; 130 is a third elastic member; 140 is a rolling connection part; 150 is a pull rod assembly; 160 is a second ball; 200 is a valve core assembly; 210 is a valve core; 220 is a main shaft assembly; 221 is a main shaft; 222 is a main shaft sleeve; 223 is a V-shaped connecting plate; 230 is a handle; 300 is a valve seat assembly; 310 is a valve seat body; 311 is a first sealing groove; 312 is a second sealing groove; 320 is a first elastic member; 330 is a movable sleeve; 331 is a limiting sunken table; 340 is a second elastic member; 400 is a sealing assembly; 410 is a first sealing ring; 420 is a second sealing ring; 10 is an oil-gas recovery connector sealing ring; 11 is an oil-gas recovery valve core; 12 is an oil-gas recovery spring; 13 is a guide column; and 14 is an oil-gas recovery valve body. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0033] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, which are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0034] It should be noted that when a component is referred to as "mounted on" another component, it can be directly on the other component or there can be a middle component. When a component is considered to be "provided on" another component, it can be directly provided on the other component or there can be a middle component. When a component is considered to be "fixed to" another component, it can be directly fixed to the other component or there can be a middle component.

[0035] It should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0037] As shown in Figures 1-10 The present application provides a dry separation oil-gas coupling valve, which comprises a housing assembly 100, a valve core assembly 200, a valve seat assembly 300 and a sealing assembly 400. The housing assembly 100 forms a cavity inside, and the valve core assembly 200, the valve seat assembly 300 and the sealing assembly 400 are all arranged in the cavity. The valve seat assembly 300 comprises a valve seat body 310, and the sealing assembly 400 is fixed on the valve seat body 310, and the valve seat body 310 can move up and down relative to the housing assembly 100. One end of the valve core assembly 200 passes through the valve seat body 310 and can move up and down relative to the housing assembly 100.

[0038] The sealing assembly 400 comprises a first sealing ring 410 and a second sealing ring 420. The first sealing ring 410 is arranged in the first sealing groove 311 formed on the top of the valve seat body 310, and is used to seal the valve seat body 310 and the valve core assembly 200. The second sealing ring 420 is arranged in the second sealing groove 312 formed on the side wall of the valve seat body 310, and is used to seal the valve seat body 310 and the housing assembly 100. The oil-gas coupling valve of the embodiment of the present application can effectively prevent sundries from entering the sealing chamber through the double-layer sealing structure among the valve housing 110, the valve core 210 and the valve seat body 310, and the first and second sealing rings are respectively embedded in the first and second sealing grooves and are not easy to fall off.

[0039] As shown in Figure 1 , the overall shape of the housing assembly 100 is in a cylindrical structure, and the housing assembly 100 comprises a valve housing 110 and a sleeve 120 arranged outside the valve housing 110. A third elastic member 130 is arranged between the sleeve 120 and the valve housing 110 to enable the sleeve 120 to move up and down relative to the valve housing 110. In this embodiment, the third elastic member 130 is selected as a telescopic outer guide column.

[0040] A chamber is formed in the valve housing 110. As shown in Figure 2 , 3 , a circular stepped structure 111 for limiting is formed in the inside of the valve housing 110, and a second elastic member 340 is arranged on the stepped structure 111. The valve seat body 310 is located on the upper part of the second elastic member 340 and tightly presses the second elastic member 340. An active adapter 330 is arranged on the upper part of the valve seat body 310, and a first elastic member 320 is arranged between the active adapter 330 and the valve seat body 310. Thus, when the first elastic member 320 is stretched and contracted, the active adapter 330 can move up and down relative to the valve seat body 310. In this embodiment, the second elastic member 340 is selected as a wave spring, and the first elastic member 320 and the third elastic member 130 are selected as telescopic outer guide columns.

[0041] In order to better control the up and down movement of the sleeve 120, a pull rod assembly 150 is installed on the outside of the sleeve 120. One end of the pull rod assembly 150 is connected with the sleeve 120, and the other end is connected with the third elastic member 130. In use, the pull rod assembly 150 is pressed downward to extrude the third elastic member 130, thereby driving the sleeve 120 to move downward. If the sleeve 120 is to be reset, the active adapter 330 is pressed downward, and the third elastic member 130 rebounds to drive the sleeve 120 to move upward. Figure 2 , 3As shown, in the closed state of the oil-gas coupling valve, the valve core 210 presses the first sealing ring 410, and the second sealing ring 420 on the side of the valve seat body 310 separates the inside of the chamber from the outside, preventing foreign matter from entering the inside of the chamber. The first sealing ring 410 is installed in the first sealing groove 311 of the valve seat and is pressed by the valve core 210. The second sealing ring 420 is installed in the second sealing groove 312 on the side wall of the valve body and is in a compressed state. The outer ring of the second sealing ring 420 is surrounded by the chamber of the valve shell 110 and is not easy to fall off during long-term use. The wave spring is below the valve seat and can absorb excess compression and provide a continuous pressure to the first and second sealing rings to ensure reliable connection. When the oil-gas coupling valve is tightly fitted, the first and second sealing rings at the fitting are compressed, and the excess compression is absorbed by the wave spring, so that the pressure on the first and second sealing rings is basically consistent in any case, improving the service life of the first and second sealing rings.

[0042] The valve seat body 310 has a through hole in the middle for the valve core assembly 200 to pass through, and a plurality of air holes uniformly distributed around the valve seat body 310.

[0043] As shown, Figure 5 The oil-gas coupling valve also includes a locking structure for locking the sleeve 120 and the movable sleeve 330. The locking structure includes a mounting groove 112 on the side wall of the valve shell 110, a rolling connection part 140 placed in the mounting groove 112, a limiting sunken table 331 on the movable sleeve 330, and a clamping groove 121 on the inner wall of the sleeve 120. One end of the rolling connection part 140 selectively abuts the limiting sunken table 331, and the other end selectively clamps the clamping groove 121. Figure 5 When the oil-gas coupling valve is connected to the oil-gas recovery joint, the movable sleeve 330 is pressed downward, the limiting sunken table 331 abuts the rolling connection part 140, and part of the structure of the rolling connection part 140 is located in the limiting sunken table 331, providing a pressure to the movable sleeve 330. At the same time, part of the structure of the rolling connection part 140 has left the clamping groove 121, so that the sleeve 120 moves upward under the elastic force of the third elastic member 130, achieving the reset of the sleeve 120; see Figure 7When the sleeve 120 is opened (i.e. the sleeve 120 is moved downward), the rolling connection part 140 is moved, and part of the structure falls into the clamping groove 121, so that the abutting force of the rolling connection part 140 and the limiting sink 331 is small, and the movable sleeve 330 is reset. When connected with other equipment, the oil and gas coupling valve only needs to be close to the oil and gas recovery joint or the parking joint, and through the interlocking structure, the oil and gas coupling valve will automatically align the connection, clamp the joint, greatly reducing the working strength of the operator, saving time and effort, and being easy to operate and not easy to make mistakes. The automatic alignment connection action of the oil and gas coupling valve is as shown in Figure 8 、 9 , before being connected with other equipment, the sleeve 120 is in an open state, and the second ball 160 is placed in the mounting hole 113 at the top of the valve housing 110 of the oil and gas coupling valve, when being connected with other equipment, the oil and gas coupling valve is close to the oil and gas recovery joint or the parking joint, the movable sleeve 330 is extruded and moved downward, and relies on the interlocking structure between the sleeve 120, at this time, the sleeve 120 is reset, and the second ball 160 is clamped into the clamping groove of the oil and gas recovery joint or the parking joint, realizing automatic alignment connection.

[0044] The rolling connection part 140 is provided with one or more first balls. In this embodiment, three first balls are selected as an example.

[0045] As shown in Figure 2 , the side wall of the top of the valve housing 110 (i.e. the end connected with the oil and gas recovery joint) is provided with a plurality of mounting holes 113 uniformly distributed in the circumferential direction, and one second ball 160 is placed in each mounting hole 113. The cross section of the mounting hole 113 is in the shape of large outside and small inside, so that part of the spherical structure of the second ball 160 enters the cavity of the valve housing 110, so that when the oil and gas coupling valve is connected with the oil and gas recovery joint, a plurality of second balls 160 are used for butt joint, and are clamped in all directions, to ensure the centering during coupling. The second ball 160 forms rolling friction during connection, is not easy to wear, can ensure that the oil and gas recovery joint and the parking joint connected therewith are not easy to be damaged, and improves the service life of the matched joint. Correspondingly, as shown in Figure 6 、 7 , at the position of the sleeve 120 corresponding to the mounting hole 113, the inner side of the side wall of the sleeve 120 is provided with a first limiting wall 122 for limiting the position of the second ball 160 in the circumferential direction, the upper portion of the first limiting wall 122 is provided with a second limiting wall 123 for preventing the second ball 160 from rolling out of the outer side of the mounting hole 113, the diameter of the second limiting wall 123 is greater than that of the first limiting wall 122, and the first limiting wall 122 and the second limiting wall 123 are connected by a slope. The clamping groove 121 is located below the first limiting wall 122.

[0046] As shown in Figure 2 、 4As shown, the valve core assembly 200 includes a valve core 210, a spindle assembly 220, and a handle 230. The top end of the valve core 210 is sealingly connected to the valve seat, the bottom end of the valve core 210 is connected to one end of the spindle assembly 220, the other end of the spindle assembly 220 is connected to the handle 230, and the handle 230 is located outside the valve housing 110.

[0047] As shown in Figure 4 , the spindle assembly 220 includes a spindle 221, a spindle sleeve 222 sleeved on the spindle 221, and a V-shaped connecting plate 223 hinged to the spindle sleeve 222, which is further hinged to the valve core 210. The spindle 221 is connected to the handle 230, and the spindle sleeve 222 has a cavity similar in shape to the longitudinal section of the spindle 221. The spindle sleeve 222 is sleeved on the spindle 221 and located at the center of the chamber of the valve housing 110. The spindle sleeve 222 is arranged in a cam shape. By rotating the external handle 230, the oil and gas coupling valve drives the spindle sleeve 222 on the spindle 221 to rotate, which in turn drives the V-shaped connecting plate 223 to move, ultimately changing the stroke of the valve core 210, and thereby realizing the opening and closing of the oil and gas coupling valve. The valve core assembly 200 adopts a mechanical lever structure, which controls the stroke of the valve core 210 by opening and closing the handle 230, changing the form of the past top rod compressing spring, so that the valve core 210 can completely open the oil and gas recovery connector.

[0048] As shown in Figure 1 , the pull rod assembly 150 is arranged on the same side of the oil and gas coupling valve as the handle 230, and is located above the handle 230. The pull rod assembly 150 drives the sleeve 120 to move towards the handle 230, and the bottom surface of the sleeve 120 is very close to the handle 230, which hinders the normal movement of the rotation center of the handle 230, thereby limiting the rotation of the handle 230. At this time, the valve core 210 cannot be opened, and the self-locking function is achieved to prevent accidental opening of the handle 230.

[0049] Operation and principle flow of the oil and gas coupling valve:

[0050] 1. As shown in 8, the right side of the oil and gas coupling valve is the tanker oil and gas recovery connector part, which mainly includes an oil and gas recovery connector sealing ring 10, an oil and gas recovery connector valve core 11, an oil and gas recovery spring 12, a guide column 13, and an oil and gas recovery valve body 14. The oil and gas recovery connector is installed at the bottom of the tanker. In the non-working state, the connector is in the closed state as shown in Figure 8 , which ensures that the dangerous gas inside the tanker will not leak out.

[0051] 2. As shown in 8, the oil-gas coupling valve is in a completely disconnected state: at this time, the oil-gas coupling valve and the oil and gas recovery joint are both closed, preventing dangerous gas leakage. When the oil-gas coupling valve is in a completely disconnected state, the dial lever assembly moves the sleeve 120 towards the handle 230, and the sleeve 120 is clamped in the clamping groove 121 by the interlocking structure, preventing the sleeve 120 from loosening. At this time, the top end of the valve housing 110 is far above the edge of the sleeve 120, and the sleeve 120 is in an open state. Because the bottom surface of the sleeve 120 is very close to the handle 230, the rotation of the handle 230 is limited, so the handle 230 cannot be opened now, preventing gas leakage caused by misoperation. The movable sleeve 330 has been reset when the sleeve 120 is opened. From the side with the second ball 160, the height of the movable sleeve 330 is much higher than the height of the valve core 210. At this time, the valve core 210 is pulled tight by the V-shaped connecting plate 223, the main shaft assembly 220 is in a closed state position, the handle 230 is in a closed state, the first sealing ring 410 on the valve seat body 310 is pressed on one side of the end surface of the valve core 210, sealing the gap between the valve core 210 and the valve seat body 310, and the second sealing ring 420 on the side of the valve seat body 310 is in a compressed sealing state. At this time, the valve seat assembly 300 and the valve core 210 separate the inner cavity of the oil-gas coupling valve from the outside, preventing gas leakage in the swan pipe.

[0052] 3. As shown in 9, the oil-gas coupling valve is in a docking state:

[0053] During docking, the oil-gas coupling valve gradually approaches the oil and gas recovery joint, and the oil and gas recovery valve body 14 first contacts the movable sleeve 330. The movable sleeve 330 is pressed against the valve seat body 310, and the interlocking structure between the movable sleeve 330 and the sleeve 120 resets the sleeve 120. The height of the side of the sleeve 120 close to the oil and gas recovery joint is basically level with the top of the valve housing 110, and the second ball 160 is just clamped into the clamping groove of the oil and gas recovery valve body 14. At this time, the first sealing ring 410 is tightly attached to the oil and gas recovery valve body 14. When the first and second sealing rings are compressed too tightly, the excess compression will be absorbed by the wave spring. The valve core 210 is in close contact with the oil and gas recovery valve core 210, completing the initial docking.

[0054] 4. As shown in 10, the oil-gas coupling valve is in a completely open state:

[0055] After the connecting process, the oil-gas coupling valve and the oil-gas recovery joint are tightly connected together, the handle 230 is rotated counterclockwise to open, the handle 230 is connected with the main shaft 221, the main shaft 221 is externally provided with the main shaft rotating sleeve 222 which moves synchronously with the main shaft 221, the main shaft rotating sleeve 222 is similar to a cam structure, drives the V-shaped connecting plate 223 to move, pushes the valve core 210 to open the oil-gas recovery valve, and makes the oil-gas recovery valve and the oil-gas recovery joint form a cavity, here the rotary motion of the handle 230 is converted into the linear motion of the valve core 210, as shown in the figure, at this time the oil-gas coupling valve is in the completely open working state, and the loading and unloading operation of the gas medium is realized.

[0056] As shown in 8-9, the oil-gas coupling valve realizes the state from closing to completely opening, when the loading and unloading operation is completed, the state from completely opening to closing is also needed. At this time the handle 230 is pulled in the clockwise direction, drives the main shaft 221 to rotate and close, drives the V-shaped connecting plate 223 and the valve core 210 through the main shaft rotating sleeve 222, under the action of the spring on the oil-gas recovery joint, the oil-gas recovery valve core 11 moves synchronously with the valve core 210, so that the oil-gas coupling valve and the oil-gas recovery joint are closed at the same time, then the pull rod assembly is pulled, so that the oil-gas recovery joint is completely separated, at this time the oil-gas coupling valve is in the completely closed non-working state. In the whole process of connecting and separating, the inner cavity of the oil-gas coupling valve is always isolated from the outside, the double-layer sealing form guarantees the sealing of the connection, there is no volatile and leakage of dangerous gas, and the dry separation in the gas phase form is realized.

[0057] The above-mentioned embodiments of the present application do not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. A dry-separation oil-gas coupling valve, characterized by: The application relates to a dry separation oil-gas coupling valve, which comprises a shell assembly (100), a valve core assembly (200), a valve seat assembly (300) and a sealing assembly (400), the shell assembly (100) is internally formed with a cavity, the valve core assembly (200), the valve seat assembly (300) and the sealing assembly (400) are arranged in the cavity, the valve seat assembly (300) comprises a valve seat body (310), the sealing assembly (400) is fixed on the valve seat body (310), and the valve seat body (310) can move up and down relative to the shell assembly (100); one end of the valve core assembly (200) penetrates through the valve seat body (310) and can move up and down relative to the shell assembly (100); the sealing assembly (400) comprises a first sealing ring (410) arranged in a first sealing groove (311) opened at the top of the valve seat body (310) and used for sealing the valve seat body (310) and the valve core assembly (200), and a second sealing ring (420) arranged in a second sealing groove (312) opened in the side wall of the valve seat body (310) and used for sealing the valve seat body (310) and the shell assembly (100); a double-layer sealing structure is formed; the valve seat assembly (300) further comprises a second elastic member (340), a step structure (111) for placing the valve seat assembly (300) is formed in the shell assembly (100), the second elastic member (340) is arranged between the valve seat body (310) and the step structure (111), and the second elastic member (340) is configured to absorb the excess compression amount of the valve seat body (310) and make the first sealing ring (410) and the second sealing ring (420) keep constant pressure in dynamic operation.

2. A dry-separation, oil-gas coupling valve according to claim 1, characterized in that: The shell assembly (100) comprises a valve shell (110) and a sleeve (120) arranged outside the valve shell (110), a third elastic member (130) is arranged between the sleeve (120) and the valve shell (110) so that the sleeve (120) can move up and down relative to the valve shell (110); the valve core assembly (200), the valve seat assembly (300) and the sealing assembly (400) are located in the valve shell (110); The valve seat assembly (300) further comprises a movable sleeve (330) and a first elastic member (320), and the first elastic member (320) is arranged between the movable sleeve (330) and the valve seat body (310).

3. The dry separation oil-gas coupling valve according to claim 2, characterized in that: The oil-gas coupling valve further comprises a linkage structure for realizing linkage action of the sleeve (120) and the movable sleeve (330), the linkage structure comprising a mounting groove (112) formed on the side wall of the valve housing (110), a rolling connection part (140) arranged in the mounting groove (112), a limiting sunken table (331) formed on the movable sleeve (330), and a clamping groove (121) formed on the inner wall of the sleeve (120), one end of the rolling connection part (140) being selectively connected with the limiting sunken table (331), and the other end being selectively connected with the clamping groove (121).

4. A dry-separation, oil-gas coupling valve according to claim 3, characterized in that: The rolling connection part (140) is provided as one or more first rolling balls.

5. A dry-separation, oil-gas coupling valve according to claim 2, characterized in that: The second elastic member (340) is provided as a wave spring, and the first elastic member (320) and the third elastic member (130) are provided as external guide columns with telescopic function.

6. A dry-separation, oil-gas coupling valve according to claim 2, characterized in that: The oil-gas coupling valve further comprises a pull rod assembly (150), one end of the pull rod assembly (150) being connected with the sleeve (120), and the other end being connected with the third elastic member (130), so that the third elastic member (130) is pressed to drive the sleeve (120) to move downward by pulling the pull rod assembly (150).

7. A dry-separation, oil-gas coupling valve according to claim 3, characterized in that: The side wall of the valve housing (110) is provided with a plurality of mounting holes (113) in the circumferential direction, a second rolling ball (160) being arranged in each mounting hole (113), and the cross section of each mounting hole (113) being in the shape of large outside and small inside so that part of the spherical structure of the second rolling ball (160) enters the cavity of the valve housing (110). The inner side of the side wall of the sleeve (120) is provided with a first limiting wall (122) in the circumferential direction for limiting the position of the second rolling ball (160), a second limiting wall (123) being arranged above the first limiting wall (122) for preventing the second rolling ball (160) from rolling off the mounting hole (113), the diameter of the second limiting wall (123) being larger than that of the first limiting wall (122), and the clamping groove (121) being located below the first limiting wall (122).

8. A dry-separation, oil-gas coupling valve according to claim 2, characterized in that: The valve core assembly (200) comprises a valve core (210), a main shaft assembly (220), and a handle (230), the top end of the valve core (210) being sealingly connected with the valve seat, the bottom end of the valve core (210) being connected with one end of the main shaft assembly (220), the other end of the main shaft assembly (220) being connected with the handle (230), and the handle (230) being located outside the valve housing (110).

9. A dry-separation, oil-gas coupling valve according to claim 8, characterized in that: The main shaft assembly (220) comprises a main shaft (221), a main shaft sleeve (222) sleeved on the main shaft (221), and a V-shaped connecting plate (223) hinged with the main shaft sleeve (222), the V-shaped connecting plate (223) being hinged with the valve core (210), the main shaft (221) being connected with the handle (230), and the main shaft sleeve (222) being arranged in the shape of a cam and located at the center position of the cavity of the valve housing (110).

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