Valve assembly, one-way valve and electromagnetic valve

Abstract

The utility model provides a valve assembly, a one-way valve and an electromagnetic valve, the valve assembly comprises a valve cover structure and a valve body structure, and the valve cover structure is in threaded fit with the valve body structure; one of the valve cover structure and the valve body structure is provided with a protruding piece, and the other one is provided with a limiting groove and a limiting piece; the valve deck structure rotates relative to the valve body structure in the screwing direction, and at least part of the protruding piece stretches into the limiting groove. The limiting piece has a limiting state, and in the limiting state, the protruding piece is located in the limiting groove and matched with the limiting piece in a limiting mode so that the valve deck structure can be prevented from rotating in the unscrewing direction. The valve cover structure and the valve body structure are effectively limited, and the valve cover structure and the valve body structure are effectively prevented from being loosened in threaded fit.

Description

Technical Field

[0001] The utility model relates to the technical field of valve structures, in particular to a valve assembly, a one-way valve and a solenoid valve. Background Art

[0002] At present, in the field of fluid control, a one-way valve is a valve device that allows fluid to flow in through an inlet and out through an outlet, and is used to control the flow direction of the fluid. A one-way valve assembly usually includes a valve cover and a valve core assembly, and the valve core assembly includes a valve body and a valve core assembled in the valve body. The valve body and the valve cover are connected to form a fixed connection or a limited fit. During the use of the one-way valve, the connection and fit between the valve body and the valve cover will affect the reliability of the connection between the two. If the connection between the valve body and the valve cover is unreliable, it may affect the normal use of the one-way valve. Therefore, how to improve the reliability of the connection between the valve body and the valve cover is a technical problem to be solved. Utility Model Content

[0003] The utility model provides a valve assembly, a one-way valve and a solenoid valve to solve the problems in the prior art that the connection strength between the valve body and the valve cover is low and the valve body is prone to loosening and disconnection.

[0004] In order to solve the above problems, according to one aspect of the utility model, a valve assembly is provided, including: a valve cover structure and a valve body structure, one axial end of the valve cover structure is threadedly matched with one axial end of the valve body structure; one of the valve cover structure and the valve body structure has a protrusion extending along the axial direction, and the other has a limiting groove and an elastically arranged limiting member; the valve cover structure rotates relative to the valve body structure in the tightening direction, and at least part of the protrusion extends into the limiting groove; the limiting member has a limiting state, in which the protrusion is located in the limiting groove and is limitedly matched with the limiting member to prevent the valve cover structure from rotating in the loosening direction.

[0005] Furthermore, when the valve cover structure rotates relative to the valve body structure in the tightening direction, the protruding piece moves relative to the limiting groove along the circumference of the valve cover structure and moves axially toward the inside of the limiting groove.

[0006] Furthermore, one end of the limiting member elastically arranged in the limiting groove is a free end, and the free end is used to cooperate with the protruding member in limiting manner; the other end of the limiting member is a fixed end, which is located in the limiting groove and fixedly connected to the inner wall of the limiting groove.

[0007] Furthermore, the protruding piece is made of metal material or plastic; the limiting piece is made of plastic or metal material.

[0008] Further, under the condition that the valve cover structure has a protruding piece extending axially, and the valve body structure has a limiting groove and a limiting piece with one end elastically set in the limiting groove, the end of the limiting piece elastically set in the limiting groove is a free end, and the other end of the limiting piece is a fixed end, and the fixed end is fixedly connected to the inner wall of the limiting groove; wherein, in the limiting state, the protruding piece extends into the limiting groove, and cooperates with the inner wall of the limiting groove and the free end in limiting manner.

[0009] Furthermore, the inside of the valve cover structure has an internal thread, and two protrusions are arranged at intervals on the end face of the valve cover structure with the internal thread; the valve body structure includes a threaded section and a matching section connected in sequence along the axial direction, and the outer periphery of the threaded section has an external thread, and the external thread matches the internal thread; the matching section has a limiting groove, and there are two limiting grooves, and a limiting member is arranged in each limiting groove; wherein the two limiting grooves are arranged symmetrically and at intervals; the two limiting members have the same extension direction from the fixed end to the free end. Further, the outer wall of the valve cover structure includes a first section and a second section in a stepped shape; the outer wall of the valve body structure is protruded with an annular plate; the protrusion is located at one end of the second section facing the annular plate, and the limiting member and the limiting groove are located on the annular plate.

[0010] Furthermore, the valve assembly also includes a mounting body, a sealing member is provided in the space surrounded by the first section, the second section and the annular plate, and the valve cover structure is sealedly connected to the mounting body via the sealing member.

[0011] Furthermore, the limiting member also has a loosened state; in the loosened state, one end of the limiting member is driven away from the protruding member to avoid the protruding member, and the valve cover structure rotates relative to the valve body structure in the loosening direction.

[0012] Furthermore, the limit groove extends along the circumference of the valve body structure, and when the protrusion moves from one end of the limit groove to the other end of the limit groove, the relative rotation angle between the valve cover structure and the valve body structure is A; the pitch of the thread between the valve cover structure and the valve body structure is P, and a first axial length L=P*A / π is set; in the limited state, the axial length of the protrusion located in the limit groove is a second axial length B, then L>B, so that when the protrusion moves from one end of the limit groove to the other end of the limit groove, the protrusion is out of contact with the limit groove.

[0013] Furthermore, the end of the limiting groove opposite to the limiting member has a limiting surface, and the protruding member located in the limiting groove cooperates with the limiting surface; the limiting surface and the limiting member jointly limit the protruding member.

[0014] Furthermore, the valve assembly also includes an elastic limiting member, one end of the elastic limiting member elastically set in the limiting groove is the first end, and the other end of the elastic limiting member is the second end; the second end is fixedly connected to the inner wall of the limiting groove at one end away from the limiting member, and the first end and the limiting member are spaced apart in the limiting groove to jointly limit the protruding member.

[0015] According to another aspect of the utility model, a one-way valve is provided, which includes the above-mentioned valve assembly; the one-way valve also includes a valve core assembly, the valve body structure has a valve port, and the valve core assembly can be movably and elastically arranged in the valve body structure for one-way opening and closing of the valve port.

[0016] Furthermore, a guide groove is provided on the inner wall of the valve body structure, and a part of the valve core assembly penetrates into the guide groove and cooperates with the guide groove.

[0017] According to another aspect of the utility model, a solenoid valve is provided, comprising the above-mentioned valve assembly.

[0018] Applying the technical solution of the utility model, the utility model provides a valve assembly, including: a valve cover structure and a valve body structure, wherein one axial end of the valve cover structure is threadedly matched with one axial end of the valve body structure; one of the valve cover structure and the valve body structure has a protruding piece extending along the axial direction, and the other has a limiting groove and a limiting piece with one end elastically arranged in the limiting groove; the valve cover structure rotates in a tightening direction relative to the valve body structure, and at least part of the protruding piece extends into the limiting groove; the limiting piece has a limiting state, and in the limiting state, the protruding piece is located in the limiting groove and is limitedly matched with the limiting piece to prevent the valve cover structure from rotating in a loosening direction.

[0019] The utility model simplifies the connection process between the valve cover structure and the valve body structure by arranging the threaded cooperation between the valve cover structure and the valve body structure, and at the same time facilitates the installation and disassembly of the valve cover structure and the valve body structure; during the installation process, the valve cover structure and the valve body structure are not easy to break; in addition, by arranging the protrusions, the limit grooves and the limit members working together, the effective anti-loosening of the threaded cooperation between the valve cover structure and the valve body structure is achieved, the connection strength of the valve cover structure and the valve body structure is effectively improved, and the problem of loosening and disconnection of the valve cover structure and the valve body structure is avoided; the subsequent valve cover structure and valve body structure can be made of plastic material, which is lower in cost than the existing metal valve cover structure and metal valve body structure; compared with the existing metal valve cover structure and plastic valve body structure, the valve body structure is also not easy to break. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0021] Figure 1 The external structure schematic diagram of the valve body structure provided by the embodiment of the utility model is shown;

[0022] Figure 2 The figure shows the external structure schematic diagram of the valve body structure provided by the embodiment of the utility model at another angle;

[0023] Figure 3 A schematic diagram showing a specific structure of a valve body structure provided by an embodiment of the utility model in a top view is shown;

[0024] Figure 4 A specific structural schematic diagram of a valve cover structure provided by an embodiment of the utility model is shown;

[0025] Figure 5 A schematic diagram of the external structure of a one-way valve provided in an embodiment of the utility model is shown;

[0026] Figure 6 A schematic diagram of the internal structure of a one-way valve provided in an embodiment of the utility model is shown;

[0027] Figure 7 A schematic diagram of the specific structure of the valve cover structure and the valve body structure provided in the embodiment of the utility model when they are disconnected in a loosened state;

[0028] Figure 8 A specific structural schematic diagram of the valve cover structure and the valve body structure provided by the embodiment of the utility model in a limited position state is shown.

[0029] The above drawings include the following reference numerals:

[0030] 10. Valve cover structure; 11. Internal thread; 12. First section; 13. Second section;

[0031] 20. Valve body structure; 21. Threaded section; 22. Fitting section; 23. Valve port; 24. Ring plate;

[0032] 30. Protruding parts;

[0033] 40. Limiting groove; 41. Limiting surface;

[0034] 50. Limiting member; 51. Free end; 52. Fixed end;

[0035] 60. Valve core assembly;

[0036] 70. Mounting body;

[0037] 80. Seals. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0039] like Figures 1 to 8 As shown, an embodiment of the utility model provides a valve assembly, including: a valve cover structure 10 and a valve body structure 20, wherein one axial end of the valve cover structure 10 is threadedly matched with one axial end of the valve body structure 20; one of the valve cover structure 10 and the valve body structure 20 has a protrusion 30 extending along the axial direction, and the other has a limiting groove 40 and a limiting member 50 elastically arranged in the limiting groove 40; the valve cover structure 10 rotates relative to the valve body structure 20 in the tightening direction, and at least part of the protrusion 30 extends into the limiting groove 40; the limiting member 50 has a limiting state, in which the protrusion 30 is located in the limiting groove 40 and is limitedly matched with the limiting member 50 to prevent the valve cover structure 10 from rotating in the loosening direction.

[0040] For example, the valve cover structure 10 has a protrusion 30 extending along the axial direction, the valve body structure 20 has a limiting groove 40 and a limiting member 50 with one end elastically set in the limiting groove 40; or, the valve body structure 20 has a protrusion 30 extending along the axial direction, the valve cover structure 10 has a limiting groove 40 and a limiting member 50 with one end elastically set in the limiting groove 40.

[0041] It should be noted that the limiting groove 40 can be a through-structure or a non-through-structure; Figure 7 and Figure 8 As shown, the limiting member 50 has a limiting state and a loosened state. In the limiting state, at least a portion of the protruding member 30 extends into the limiting groove 40, and cooperates with the inner wall of the limiting groove 40 and the limiting member 50 to prevent the valve cover structure 10 and the valve body structure 20 from rotating relative to each other; in the loosened state, at least a portion of the limiting member 50 at one end close to the protruding member 30 extends out of the limiting groove 40 to avoid the protruding member 30, and the thread between the valve cover structure 10 and the valve body structure 20 can be loosened.

[0042] The utility model provides a valve cover structure 10 and a valve body structure 20 for threaded cooperation, which simplifies the connection process between the valve cover structure 10 and the valve body structure 20, and is convenient for installation and disassembly between the valve cover structure 10 and the valve body structure 20; during the installation process, the valve cover structure 10 and the valve body structure 20 are not easy to break; in addition, by providing a protruding member 30, a limiting groove 40 and a limiting member 50 for cooperation, it is possible to achieve effective limiting of the valve cover structure 10 and the valve body structure 20, and also to achieve effective anti-loosening of the valve cover structure 10 and the valve body structure 20 for threaded cooperation; and, combined with the threaded cooperation of the valve cover structure 10 and the valve body structure 20, the utility model effectively improves The connection strength between the valve cover structure 10 and the valve body structure 20 is improved, the problem of the valve cover structure 10 and the valve body structure 20 being loose and disconnected can be avoided, and the connection reliability of the valve cover structure 10 and the valve body structure 20 can be effectively guaranteed; when the valve assembly proposed by the utility model is actually used in a one-way valve, it is found that the working reliability of the one-way valve is significantly improved, and it is suitable for large-scale promotion and use; the subsequent valve cover structure 10 and the valve body structure 20 can both be made of plastic material, which is lower in cost than the existing metal valve cover structure and metal valve body structure; compared with the existing metal valve cover structure and plastic valve body structure, the valve body structure 20 is also not easy to break.

[0043] It should be noted that: in a specific embodiment of the present invention, the protrusion 30 can be set at a position that does not follow the rotation of the thread (on the valve cover structure 10 or the valve body structure 20), so that the protrusion 30 only has the freedom to move axially close to or away from the limiting groove 40, so as to facilitate manual adjustment by the staff; of course, it is foreseeable that the limiting groove 40 and the limiting member 50 can also be set at a position that does not follow the rotation of the thread; however, such a setting can only realize the limiting function of the part between the valve cover structure 10 and the valve body structure 20 that does not follow the rotation of the thread, and cannot achieve effective anti-loosening of the threaded cooperation between the valve cover structure 10 and the valve body structure 20. It is necessary to flexibly adopt the above method according to actual use requirements.

[0044] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7 and Figure 8As shown, the threaded fit has opposite tightening directions and loosening directions; the valve cover structure 10 has a protruding piece 30 at one threaded end, and the valve body structure 20 has a limiting groove 40 and a limiting piece 50 at one threaded end; or, the valve body structure 20 has a protruding piece 30 at one threaded end, and the valve cover structure 10 has a limiting groove 40 and a limiting piece 50 at one threaded end; wherein, when the valve body structure 20 rotates in the tightening direction, the protruding piece 30 moves relative to the limiting groove 40 along the circumference of the valve cover structure 10, and moves axially toward the inside of the limiting groove 40; when the valve body structure 20 rotates in the loosening direction, the protruding piece 30 moves relative to the limiting groove 40 along the circumferential direction, and the protruding piece 30 moves away from the limiting groove 40 along the axial direction.

[0045] This arrangement allows the protrusion 30 to rotate with the thread and move axially toward or away from the limiting groove 40, further facilitating the adjustment of the relative movement between the protrusion 30 and the limiting groove 40 and ensuring effective anti-loosening of the threaded fit between the valve cover structure 10 and the valve body structure 20.

[0046] In addition, in a specific embodiment of the present invention, the tightening direction and the loosening direction can be the rotation direction of the valve body structure 20 itself when the valve cover structure 10 is stationary and the valve body structure 20 is rotated, so as to facilitate the installation of the valve assembly structure; of course, it is foreseeable that the tightening direction and the loosening direction can be the rotation direction of the valve body structure 10 itself when the valve body structure 20 is stationary and the valve cover structure 10 is rotated.

[0047] like Figure 1 , Figure 2 and Figure 3 As shown, the limiter 50 is made of elastic material; one end of the limiter 50 elastically arranged in the limit groove 40 is a free end 51, and the free end 51 is used to cooperate with the protruding member 30; the other end of the limiter 50 is a fixed end 52, and the fixed end 52 is located in the limit groove 40 and is fixedly connected to the inner wall of the limit groove 40; wherein, through the elastic deformation of the limiter 50, the position of the free end 51 relative to the protruding member 30 is adjusted to switch the limit state and the release state. By setting the fixed end 52 to be located in the limit groove 40 and fixedly connected to the inner wall of the limit groove 40, the limiter 50 is convenient to be directly processed in the limit groove 40, and the limiter 50 is covered in the limit groove 40, so as to achieve effective protection for the limiter 50 and avoid the limiter 50 from breaking and other problems.

[0048] Optionally, the limiter 50 is made of elastic material; one end of the limiter 50 elastically arranged in the limit groove 40 is a free end 51, and the other end of the limiter 50 is a fixed end 52, the fixed end 52 is located outside the limit groove 40, and is fixedly connected to the part of the valve body structure 20 or the valve cover structure 10 located outside the limit groove 40; wherein, through the elastic deformation of the limiter 50, the position of the free end 51 relative to the protruding member 30 is adjusted to switch between the limit state and the release state. By setting the fixed end 52 to be located outside the limit groove 40 and fixedly connected to the part of the valve body structure 20 or the valve cover structure 10 located outside the limit groove 40, the installation position of the limiter 50 is not limited to the limit groove 40, and a flexible setting is achieved, thereby improving the application range of the valve assembly.

[0049] Specifically, the limiting groove 40 extends along the circumference of the valve body structure 20, and when the protrusion 30 moves from one end of the limiting groove 40 to the other end of the limiting groove 40, the relative rotation angle of the valve cover structure 10 and the valve body structure 20 is A; the pitch of the thread between the valve cover structure 10 and the valve body structure 20 is P, and the first axial length L=P*A / π is set; in the limiting state, the axial length of the part of the protrusion 30 located in the limiting groove 40 is the second axial length B, then L>B, so that when the protrusion 30 moves from one end of the limiting groove 40 to the other end of the limiting groove 40, the protrusion 30 is out of contact with the limiting groove 40.

[0050] It should be noted that the distance that the thread between the valve cover structure 10 and the valve body structure 20 moves axially for one rotation is determined by the pitch; the pitch is the distance that the thread moves for each rotation; specifically, the pitch is the axial distance between two adjacent points on the spiral line of the thread, usually expressed in millimeters or inches. The larger the pitch of the thread, the greater the distance that the thread moves axially for one rotation; the smaller the pitch, the smaller the distance that the thread moves axially for one rotation. Therefore, the pitch is an important parameter that determines the distance that the thread moves axially for one rotation. The utility model limits the numerical relationship between the first axial length L and the second axial length B, and effectively ensures that the protrusion 30 is out of contact with the limiting groove 40 when the protrusion 30 moves from one end of the limiting groove 40 to the other end of the limiting groove 40, thereby ensuring the convenience of thread disassembly between the valve cover structure 10 and the valve body structure 20.

[0051] Optionally, the protruding member 30 is made of metal or plastic; the limiting member 50 is made of plastic or metal. By setting the materials of the protruding member 30 and the limiting member 50, the working reliability of the two is ensured and the elastic deformation can be adjusted manually, and the protruding member 30 and the limiting member 50 are easy to process and shape.

[0052] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 7and Figure 8 As shown, under the condition that the valve cover structure 10 has a protruding piece 30 extending in the axial direction, the valve body structure 20 has a limiting groove 40 and a limiting piece 50 at one end elastically set in the limiting groove 40, one end of the limiting piece 50 elastically set in the limiting groove 40 is a free end 51, and the other end of the limiting piece 50 is a fixed end 52, and the fixed end 52 is fixedly connected to the inner wall of the limiting groove 40; wherein, in the limiting state, the protruding piece 30 extends into the limiting groove 40, and is limitedly matched with the inner wall of the limiting groove 40 and the free end 51; in the released state, through the elastic deformation of the limiting piece 50, the free end 51 extends out of the limiting groove 40 in the axial direction and away from the valve cover structure 10, and the protruding piece 30 can move in the limiting groove 40.

[0053] By arranging the free end 51 to extend out of the limiting groove 40 in the axial direction and away from the valve cover structure 10 , the deformation control of the free end 51 is further facilitated, thereby making it more convenient for the staff to manually adjust the free end 51 .

[0054] like Figures 1 to 8 As shown, the interior of the valve cover structure 10 has an internal thread 11, and two protrusions 30 are arranged at intervals on the end face of the valve cover structure 10 having the internal thread 11; the valve body structure 20 includes a threaded section 21 and a matching section 22 connected in sequence along the axial direction, and the outer periphery of the threaded section 21 has an external thread, and the external thread matches the internal thread 11; the matching section 22 has a limiting groove 40 that passes through along the axis, and there are two limiting grooves 40, and a limiting member 50 is arranged in each limiting groove 40; wherein the two limiting grooves 40 are symmetrically spaced; the two limiting members 50 have the same extension direction from the fixed end 52 to the free end 51.

[0055] By setting the two limit members 50 to extend in the same direction from the fixed end 52 to the free end 51, it is convenient to uniformly adjust the two limit members 50 when the thread rotates; and such a setting further improves the limit strength between the valve cover structure 10 and the valve body structure 20.

[0056] It should be noted that: in a specific embodiment of the present invention, the rotation direction of tightening the external thread is the tightening direction, and the rotation direction of loosening the external thread is the loosening direction.

[0057] like Figure 1 , Figure 2 and Figure 4 As shown, the outer wall of the valve cover structure 10 includes a first section 12 and a second section 13 in a stepped shape; the outer wall of the valve body structure 20 is protrudingly provided with an annular plate 24; the protruding member 30 is located at one end of the second section 13 facing the annular plate 24, and the limiting member 50 and the limiting groove 40 are located on the annular plate 24.

[0058] Alternatively, if Figure 5 and Figure 6As shown, the valve assembly further includes a mounting body 70, a sealing member 80 is provided in the space enclosed by the first section 12, the second section 13, and the annular plate 24, and the valve cover structure 10 is sealedly connected to the mounting body 70 via the sealing member 80. By providing the sealing member 80, a seal between the sealing member 80 and the mounting body 70 is achieved.

[0059] In addition, if Figure 2 As shown, the end of the limiting groove 40 opposite to the limiting member 50 has a limiting surface 41, and the protruding member 30 located in the limiting groove 40 cooperates with the limiting surface 41; the limiting surface 41 and the limiting member 50 jointly limit the protruding member 30.

[0060] Optionally, the valve assembly also includes an elastic limiting member, one end of the elastic limiting member elastically set in the limiting groove 40 is the first end, and the other end of the elastic limiting member is the second end; the second end is fixedly connected to the inner wall of the limiting groove 40 at one end away from the limiting member 50, and the first end and the limiting member 50 are spaced apart in the limiting groove 40 to jointly limit the protrusion 30.

[0061] In a specific embodiment of the present utility model, the elastic limiting member adopts the same structure as the limiting member 50, that is, there are two structures similar to the limiting member 50, one for preventing the valve cover structure 10 from rotating in the loosening direction, and the other for preventing the valve cover structure 10 from rotating in the tightening direction; one end of the limiting member 50 elastically arranged in the limiting groove 40 is the free end 51, and the other end of the limiting member 50 is the fixed end 52; one end of the elastic limiting member elastically arranged in the limiting groove 40 is the free end 51, and the other end of the elastic limiting member is the fixed end 52; the fixed end 52 (i.e. the second end) of the limiting member 50 is fixedly connected to the inner wall of one end of the limiting groove 40, and the fixed end 52 of the elastic limiting member is fixedly connected to the inner wall of the other end of the limiting groove 40, and the free ends 51 (including the first end) of the elastic limiting member and the limiting member 50 are spaced apart in the limiting groove 40 to jointly limit the protruding member 30.

[0062] By arranging an elastic limiting member and a limiting member 50 in a limiting groove 40, in a limiting state (i.e. when the protruding member 30 is located in the limiting groove 40), the two ends of a protruding member 30 are respectively limited and cooperated with the two free ends 51, so that the movement range of the protruding member 30 in two directions (i.e. tightening direction and loosening direction) in the limiting groove 40 can be adjusted, which further facilitates the staff to manually adjust the thread.

[0063] Optionally, a limiting groove 40, a limiting member 50 elastically disposed in the limiting groove 40 and a corresponding protruding member 30 form a limiting assembly, and the limiting assembly is provided in multiple groups, and the multiple groups of limiting assemblies are distributed at intervals along the circumferential direction. By providing multiple groups of limiting assemblies, the limiting strength between the valve cover structure 10 and the valve body structure 20 can be maximized.

[0064] like Figure 5 and Figure 6 As shown, the utility model also provides a one-way valve, the one-way valve includes the above-mentioned valve assembly; the one-way valve also includes a valve core assembly 60, the valve body structure 20 has a valve port 23, and the valve core assembly 60 is movably and elastically arranged in the valve body structure 20 for one-way opening and closing of the valve port 23. The one-way valve proposed by the utility model has a simple structure and reliable operation, and the valve cover structure 10 and the valve body structure 20 have good sealing performance and high connection strength.

[0065] Specifically, a guide groove is provided on the inner wall of the valve body structure 20, and a part of the valve core assembly 60 is inserted into the guide groove and cooperates with the guide groove. This arrangement ensures the working reliability of the valve core assembly 60.

[0066] The utility model also provides a solenoid valve, which includes the above-mentioned valve assembly. It should be noted that the valve cover structure 10 in the valve assembly proposed by the utility model can also be a valve seat structure of a common solenoid valve, so as to achieve thread loosening prevention and reliable position limiting when the valve body structure 20 is threadedly matched with the valve seat structure.

[0067] Now the specific working process and principle of an embodiment of the utility model are described in detail as follows:

[0068] The valve cover structure 10 has a protruding piece 30 extending in the axial direction, and the interior of the valve cover structure 10 has an internal thread 11; the protruding piece 30 is arranged on the end surface of the valve cover structure 10 having the internal thread 11; the valve body structure 20 includes a threaded section 21 and a matching section 22 connected in sequence along the axial direction, the outer periphery of the threaded section 21 has an external thread, and the external thread matches the internal thread 11; the matching section 22 has a limiting groove 40 that passes through along the axis, and one end of the limiting piece 50 is elastically arranged in the limiting groove 40, and one end of the limiting piece 50 elastically arranged in the limiting groove 40 is a free end 51, and the other end of the limiting piece 50 is a fixed end 52, and the fixed end 52 is fixedly connected to the inner wall of the limiting groove 40;

[0069] 1. When the valve cover structure 10 and the valve body structure 20 need to be installed, the number of meshing circles of the internal thread 11 and the external thread between the valve cover structure 10 and the valve body structure 20 is increased by rotating the valve body structure 20. When the internal thread 11 and the external thread are about to be tightened, the protruding piece 30 gradually extends into the limiting groove 40. Since the protruding piece 30, the valve cover structure 10, the valve body structure 20 and the limiting piece 50 are all made of elastic materials (such as plastic), when the protruding piece 30 gradually extends into the limiting groove 40, the motion interference problem (such as the interference problem of the protruding piece 30 abutting against the end face of the matching section 22) can be solved by manually adjusting the deformation of each component, so that the protruding piece 30 can be fully extended into the limiting groove 40, and the inner wall of the limiting groove 40 and the free end 51 are limited and matched, and the valve cover structure 10 and the valve body structure 20 are fixed in the limited state, and the connection and thread anti-loosening setting of the valve cover structure 10 and the valve body structure 20 are completed;

[0070] 2. When it is necessary to separate the installed valve cover structure 10 and the valve body structure 20, manually move the free end 51 of the limiting member 50 so that the free end 51 extends out of the limiting groove 40 in the axial direction and away from the valve cover structure 10. At this time, it is in a loosened state, and the protruding member 30 can move in the limiting groove 40 in the loosening direction, and continue to rotate the valve body structure 20 to reduce the number of meshing circles between the internal thread 11 and the external thread between the valve cover structure 10 and the valve body structure 20. The protruding member 30 gradually disengages from the limiting groove 40. After the internal thread 11 is completely disengaged from the external thread, the separation of the valve cover structure 10 and the valve body structure 20 is completed.

[0071] In summary, the utility model provides a valve assembly, a one-way valve and a solenoid valve. The utility model sets a valve cover structure 10 and a valve body structure 20 for threaded cooperation, which simplifies the connection process between the valve cover structure 10 and the valve body structure 20 and facilitates the installation and disassembly of the valve cover structure 10 and the valve body structure 20. During the installation process, the valve cover structure 10 and the valve body structure 20 are not prone to breakage. In addition, by setting a protruding piece 30, a limiting groove 40 and a limiting piece 50 for cooperation, it is possible to achieve effective limiting of the valve cover structure 10 and the valve body structure 20 and also achieve effective anti-loosening of the valve cover structure 10 and the valve body structure 20 for threaded cooperation. In addition, combined with the threaded cooperation of the valve cover structure 10 and the valve body structure 20, The utility model effectively improves the connection strength between the valve cover structure 10 and the valve body structure 20 by matching with the grooves, avoids the problem of loosening and disconnection between the valve cover structure 10 and the valve body structure 20, and can effectively ensure the connection reliability between the valve cover structure 10 and the valve body structure 20; when the valve assembly proposed by the utility model is actually used in a one-way valve, it is found that the working reliability of the one-way valve is significantly improved, and it is suitable for large-scale promotion and use; the subsequent valve cover structure 10 and valve body structure 20 can both be made of plastic material, which is lower in cost than the existing metal valve cover structure and metal valve body structure; compared with the existing metal valve cover structure and plastic valve body structure, the valve body structure 20 is also not easy to break.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0073] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0074] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0075] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0076] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the utility model.

[0077] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A valve assembly, characterized in that: include: A valve cover structure (10) and a valve body structure (20), wherein one axial end of the valve cover structure (10) is threadedly matched with one axial end of the valve body structure (20); one of the valve cover structure (10) and the valve body structure (20) has a protruding piece (30) extending in the axial direction, and the other has a limiting groove (40) and an elastically arranged limiting piece (50); the valve cover structure (10) rotates relative to the valve body structure (20) in a tightening direction, and at least part of the protruding piece (30) extends into the limiting groove (40); the limiting piece (50) has a limiting state, in which the protruding piece (30) is located in the limiting groove (40) and is limitedly matched with the limiting piece (50) to prevent the valve cover structure (10) from rotating in a loosening direction.

2. The valve assembly according to claim 1, characterized in that When the valve cover structure (10) rotates relative to the valve body structure (20) in the tightening direction, the protruding member (30) moves relative to the limiting groove (40) along the circumference of the valve cover structure (10) and moves axially toward the inside of the limiting groove (40).

3. The valve assembly according to claim 1, characterized in that One end of the limiting member (50) elastically arranged in the limiting groove (40) is a free end (51), and the free end (51) is used for limiting cooperation with the protruding member (30); the other end of the limiting member (50) is a fixed end (52), and the fixed end (52) is located in the limiting groove (40) and fixedly connected to the inner wall of the limiting groove (40).

4. The valve assembly according to claim 1, characterized in that The protruding piece (30) is made of metal material or plastic; the limiting piece (50) is made of plastic or metal material.

5. The valve assembly according to claim 1, characterized in that Under the condition that the valve cover structure (10) has a protruding piece (30) extending in the axial direction, and the valve body structure (20) has a limiting groove (40) and a limiting piece (50) with one end elastically arranged in the limiting groove (40), one end of the limiting piece (50) elastically arranged in the limiting groove (40) is a free end (51), and the other end of the limiting piece (50) is a fixed end (52), and the fixed end (52) is fixedly connected to the inner wall of the limiting groove (40); wherein, in the limiting state, the protruding piece (30) extends into the limiting groove (40) and is limitedly matched with the inner wall of the limiting groove (40) and the free end (51).

6. The valve assembly according to claim 5, characterized in that The valve cover structure (10) has an internal thread (11) inside, and the two protruding parts (30) are arranged at intervals on the end surface of the valve cover structure (10) having the internal thread (11); the valve body structure (20) includes a threaded section (21) and a matching section (22) connected in sequence along the axial direction, and the outer periphery of the threaded section (21) has an external thread, and the external thread matches the internal thread (11); the matching section (22) has a limiting groove (40), and there are two limiting grooves (40), and each of the limiting grooves (40) is provided with a limiting part (50); wherein the two limiting grooves (40) are symmetrically spaced; and the two limiting parts (50) have the same extension direction from the fixed end (52) to the free end (51).

7. The valve assembly according to claim 1, characterized in that The outer wall of the valve cover structure (10) comprises a first section (12) and a second section (13) in a stepped shape; the outer wall of the valve body structure (20) is provided with a protruding annular plate (24); the protruding member (30) is located at one end of the second section (13) facing the annular plate (24), and the limiting member (50) and the limiting groove (40) are located on the annular plate (24).

8. The valve assembly according to claim 7, characterized in that The valve assembly further comprises a mounting body (70), a sealing member (80) being provided in a space enclosed by the first section (12), the second section (13) and the annular plate (24), and the valve cover structure (10) being sealingly connected to the mounting body (70) via the sealing member (80).

9. The valve assembly according to claim 1, characterized in that: The limiting member (50) also has a loosened state; in the loosened state, one end of the limiting member (50) is driven away from the protruding member (30) to avoid the protruding member (30), and the valve cover structure (10) rotates relative to the valve body structure (20) along the loosening direction.

10. The valve assembly according to claim 1, characterized in that The limiting groove (40) extends along the circumference of the valve body structure (20); when the protruding piece (30) moves from one end of the limiting groove (40) to the other end of the limiting groove (40), the relative rotation angle between the valve cover structure (10) and the valve body structure (20) is A; the pitch of the thread between the valve cover structure (10) and the valve body structure (20) is P, and a first axial length L=P*A / π is set; in the limiting state, the axial length of the part of the protruding piece (30) located in the limiting groove (40) is a second axial length B, then L>B, so that when the protruding piece (30) moves from one end of the limiting groove (40) to the other end of the limiting groove (40), the protruding piece (30) is out of contact with the limiting groove (40).

11. The valve assembly according to claim 1, characterized in that The end of the limiting groove (40) opposite to the limiting member (50) has a limiting surface (41), and the protruding member (30) located in the limiting groove (40) cooperates with the limiting surface (41) in limiting manner; the limiting surface (41) and the limiting member (50) jointly limit the protruding member (30).

12. The valve assembly according to claim 1, characterized in that The valve assembly also includes an elastic limiting member, wherein one end of the elastic limiting member elastically disposed in the limiting groove (40) is a first end, and the other end of the elastic limiting member is a second end; the second end is fixedly connected to an inner wall of an end of the limiting groove (40) away from the limiting member (50), and the first end and the limiting member (50) are spaced apart in the limiting groove (40) to jointly limit the protruding member (30).

13. A one-way valve, characterized in that: The one-way valve comprises the valve assembly according to any one of claims 1 to 12; the one-way valve also comprises a valve core assembly (60), the valve body structure (20) has a valve port (23), and the valve core assembly (60) can be movably and elastically arranged in the valve body structure (20) for one-way opening and closing of the valve port (23).

14. The one-way valve according to claim 13, characterized in that: The inner wall of the valve body structure (20) is provided with a guide groove, and a portion of the valve core assembly (60) penetrates into the guide groove and cooperates with the guide groove for guidance.

15. A solenoid valve, characterized in that: A valve assembly comprising any one of claims 1 to 13.

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