Valve element assembly and one-way valve

Abstract

The utility model provides a valve element assembly and a one-way valve, and the valve element assembly comprises a valve port piece and a valve element, the limiting sleeve is provided with a first end and a second end, the limiting sleeve is further provided with a limiting channel penetrating from the first end to the second end, the first end of the limiting sleeve is connected with the valve port piece, and an overflowing hole is formed in the side wall of the limiting channel; the valve element is movably arranged in the limiting channel, and the valve element is in limiting fit with the limiting sleeve; the distance between the overflowing hole and the second end of the limiting sleeve is smaller than the distance between the valve element and the second end of the limiting sleeve when the valve port is closed. When the valve is closed, the valve element moves towards the valve port, before the valve element seals the valve port, the first overflowing hole can be communicated with the second end of the limiting sleeve, and fluid can penetrate through the second end of the limiting sleeve to enter the limiting channel, push the valve element to move and flow out of the limiting channel through the first overflowing hole. In the flowing process of fluid, the limiting channel between the valve element and the second end of the limiting sleeve can be flushed away, impurity particles in the limiting channel are flushed away, and therefore the risk that the one-way valve is stuck is reduced.

Description

Technical Field

[0001] This application relates to the technical field of valves, and specifically, to a spool assembly and a check valve. Background Art

[0002] In recent years, with the gradual improvement of people's living standards, air conditioners have become a daily necessity and entered thousands of households. In an air conditioner, a check valve is an important component. The check valve realizes the functions of forward conduction and reverse cutoff of the internal refrigerant through the movement of its internal spool.

[0003] However, during use, there will inevitably be some impurity particles in the pipeline of the air conditioner, and these impurity particles will flow in the pipeline along with the refrigerant. In some cases, these impurity particles will enter between the spool and the limit sleeve, affecting the sliding of the spool. In extreme cases, there is even a risk of jamming the spool and causing the check valve to fail. Summary of the Utility Model

[0004] This application aims to at least solve the problem of spool jamming in the prior art, and proposes a spool assembly and a check valve.

[0005] To achieve the purpose of this application, a spool assembly is provided, including:

[0006] A valve port member having a valve port;

[0007] A limit sleeve having a first end and a second end. The limit sleeve further has a limit channel penetrating from the first end to the second end. The first end of the limit sleeve is connected to the valve port member, and the side wall of the limit channel has a flow-through hole;

[0008] A spool movably arranged in the limit channel. The spool is in limit fit with the limit sleeve, and the spool opens or closes the valve port by moving;

[0009] The distance between the flow-through hole and the second end of the limit sleeve is less than the distance between the spool and the second end of the limit sleeve when the valve port is closed.

[0010] In some embodiments, at least two of the flow-through holes are circumferentially distributed along the limit sleeve to form a flow-through hole group;

[0011] At least two of the flow-through hole groups are axially distributed on the limit sleeve.

[0012] In some embodiments, the flow-through hole group includes a first flow-through hole group and a second flow-through hole group. Each of the flow-through holes in the first flow-through hole group is a first flow-through hole;

[0013] Each of the flow-through holes in the second flow-through hole group is a second flow-through hole;

[0014] The second flow-through hole and the first flow-through hole are staggered in the circumferential direction of the limit sleeve.

[0015] In some embodiments, the positions of the flow-through holes in each flow-through hole group correspond to each other in the circumferential direction of the limit sleeve.

[0016] In some embodiments, the valve core has a valve core body and a blocking portion. The blocking portion is used to block the valve port, and the valve core body is in limit fit with the limit sleeve.

[0017] In some embodiments, the second end of the limit sleeve has a limit structure for limiting the valve core.

[0018] In some embodiments, the diameter of the valve port gradually increases in the direction close to the second end of the limit sleeve, and the diameter of the blocking portion gradually increases in the direction close to the second end of the limit sleeve.

[0019] In some embodiments, the valve port member has a large-diameter section and a small-diameter section, and the first end of the limit sleeve is sleeved on the outer periphery of the small-diameter section.

[0020] According to the second aspect of the present application, a one-way valve is further disclosed, which includes a valve seat and the valve core assembly in any of the above embodiments. The valve seat has a through installation channel, and the valve core assembly is fixed in the installation channel.

[0021] In some embodiments, the outer peripheral surface of the valve port member has a connection groove arranged along the circumferential direction of the valve port member, and the valve seat has a connection structure abutting against the connection groove.

[0022] In some embodiments, the bottom of the connection groove has a convex structure for abutting against the connection structure.

[0023] In some embodiments, the valve port member is arranged in the installation channel. The valve port member has an inlet flow insertion interface for installing an inlet flow pipeline, and a welding groove can be formed among the end surface of the valve port member, the inner wall of the installation channel and the inlet flow pipeline.

[0024] The present application has the following beneficial effects:

[0025] When closing the valve, the valve core moves towards the valve port. Before the valve core closes the valve port, the first flow-through hole will communicate with the second end of the limit sleeve. The fluid can pass through the second end of the limit sleeve and enter the limit channel, push the valve core to move, and flow out of the limit channel through the first flow-through hole. During the fluid flow process, the limit channel between the valve core and the second end of the limit sleeve can be flushed, and the impurity particles in the limit channel can be washed away, thereby reducing the risk of the one-way valve being stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1Cross-sectional view of the one-way valve when it is opened in the first embodiment of the present application;

[0027] Figure 2 Cross-sectional view of the cooperation between the valve port part and the limit sleeve when the one-way valve is opened in the first embodiment of the present application;

[0028] Figure 3 Schematic structural diagram of the valve core assembly when the one-way valve is opened in the first embodiment of the present application;

[0029] Figure 4 Cross-sectional view of the one-way valve when it is closed in the first embodiment of the present application;

[0030] Figure 5 Cross-sectional view of the cooperation between the valve port part and the limit sleeve when the one-way valve is closed in the first embodiment of the present application;

[0031] Figure 6 Schematic structural diagram of the valve core assembly when the one-way valve is closed in the first embodiment of the present application;

[0032] Figure 7 Cross-sectional view when the one-way valve is opened in the second embodiment of the present application;

[0033] Figure 8 Cross-sectional view when the one-way valve is closed in the second embodiment of the present application.

[0034] List of reference numerals:

[0035] 1. Valve port part; 11. Valve port; 12. Large-diameter section; 13. Small-diameter section; 14. Connection groove;

[0036] 15. Protrusion structure; 2. Valve core; 21. Valve core body; 22. Sealing part; 3. Limit sleeve;

[0037] 30. Flow-through hole; 31. First flow-through hole; 32. Second flow-through hole; 33. Limit structure; 34. Limit channel; 4. Valve seat; 41. Connection structure; 42. Installation channel. Detailed implementation manners

[0038] To enable those skilled in the art to better understand the technical solutions of the present application, the valve core assembly and the one-way valve provided by the present application will be described in detail below with reference to the accompanying drawings.

[0039] In order to make the purpose, technical solutions and advantages of the technical solutions of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings of the specific embodiments of the present disclosure. The same reference numerals in the drawings represent the same components. It should be noted that the described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0040] Compared with the embodiments shown in the drawings, the feasible embodiments within the protection scope of the present disclosure may have fewer components, have other components not shown in the drawings, different components, components arranged differently, or components connected differently, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0041] Unless otherwise defined, the technical terms or scientific terms used herein shall have the ordinary meanings understood by those of ordinary skill in the art to which the present disclosure pertains. The terms "first", "second" and similar terms used in the specification and claims of the present patent application do not denote any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, terms such as "a", "the" and the like do not necessarily denote a quantity limitation. Terms such as "comprising" mean that the elements or objects appearing before this term cover the elements or objects listed after this term and their equivalents, without excluding other elements or objects. Terms such as "upper", "lower", "left", "right" are only used to represent the relative orientation relationship during the use of the device or the orientation relationship shown in the drawings. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0042] A spool 2 assembly provided by the present application, as Figures 1 to 6 shown, includes a valve port member 1, a limit sleeve 3 and a spool 2. The valve port member 1 has a valve port 11; the limit sleeve 3 has a first end and a second end, and the limit sleeve 3 also has a limit channel 34 penetrating from the first end to the second end. The first end of the limit sleeve 3 is connected to the valve port member 1, and the side wall of the limit channel 34 has a flow hole 30; the spool 2 is movably arranged in the limit channel 34, the spool 2 is in limit fit with the limit sleeve 3, and the spool 2 opens or closes the valve port 11 by moving; the distance between the flow hole 30 and the second end of the limit sleeve 3 is less than the distance between the spool 2 and the second end of the limit sleeve 3 when the valve port 11 is closed.

[0043] As Figure 1 and Figure 2 shown, the limit sleeve 3 can be in a cylindrical shape. The first end of the limit sleeve 3 is connected to the valve port member 1, and the spool 2 is arranged in the limit channel 34 of the limit sleeve 3 and moves between the first end and the second end of the limit sleeve 3 along the limit channel 34. During the working process, the spool 2 will move under the push of the fluid. As Figures 1 to 3 shown, when the spool 2 is away from the valve port 11, the one-way valve opens; as Figures 4 to 6As shown, when the valve core 2 fits against the valve port 11, the one-way valve closes. The side wall of the limit sleeve 3 is provided with a flow-through hole 30. After the one-way valve opens, the valve core 2 will move towards the second end of the limit sleeve 3, so that the flow-through hole 30 communicates with the valve port 11, and the fluid enters the limit channel 34 from the valve port 11 and flows out of the limit sleeve 3 through the flow-through hole 30. However, the valve core 2 will generate particles due to friction with the inner wall of the limit channel 34 during the opening and closing process of the one-way valve. The long-term accumulation of particles may cause the valve core 2 to be stuck, affecting the normal operation of the one-way valve.

[0044] In the prior art, there is usually less fluid flow at the second end of the limit sleeve 3, so it is easy to accumulate particles and cause the valve core 2 to be stuck. In this embodiment, the distance between the flow-through hole 30 and the second end of the limit sleeve 3 is less than the distance between the valve core 2 and the second end of the limit sleeve 3 when the valve port 11 is closed. As Figures 4 to 6 shown, when the one-way valve is closed, the fluid enters the limit channel 34 from the second end of the limit sleeve 3 and pushes the valve core 2 towards the valve port 11. Before the valve core 2 fits against the valve port 11, the port at the second end of the limit sleeve 3 can communicate with the flow-through hole 30 through the limit channel 34. After the fluid enters the limit channel 34 from the second end of the limit sleeve 3 and pushes the valve core 2, it flows out through the flow-through hole 30, thereby increasing the fluid flow rate through the second end of the limit sleeve 3. During the fluid flow process, the particles in the limit channel 34 can be flushed, preventing the particles from accumulating in the limit channel 34, thereby reducing the risk of the valve core 2 being stuck.

[0045] Optionally, the valve core 2 has a valve core body 21 and a blocking portion 22. The blocking portion 22 is used to block the valve port 11, and the valve core body 21 is in limit fit with the limit sleeve 3.

[0046] Optionally, the valve core 2 is made of a metal material, and its shape can be a hollow cup shape. The hollow cup shape can reduce the weight of the valve core 2, and the fluid can push the valve core 2 to move more easily, making the one-way valve operate more flexibly. Of course, the valve core 2 can be made of other materials and shapes according to needs, which are not limited here. The valve core 2 is formed by stamping or milling, etc. Among them, stamping is preferably used for processing. Stamping has higher processing efficiency and less material loss, which helps to improve the enterprise efficiency. The user can choose the processing method of the valve core 2 according to needs, which is not limited here.

[0047] The cross-section of the valve core body 21 can be circular, polygonal or other shapes. In Figure 3 and Figure 6In the specific embodiments shown, the cross-section of the valve core body 21 is circular, and the outer diameter of the valve core body 21 can be equal to or slightly smaller than the diameter of the limiting channel 34. Therefore, the valve core 2 can move within the limiting channel 34 in the middle of the limiting sleeve 3. In an embodiment where the valve core body 21 is polygonal, the diameter of the circumscribed circle of the valve core body 21 can be equal to the diameter of the limiting channel 34. Therefore, the limiting sleeve 3 can limit the valve core 2 to always move along the direction of the first axis through the valve core body 21.

[0048] Optionally, the cross-section of the blocking portion 22 and the valve port 11 can both be circular. The blocking portion 22 can partially penetrate into the valve port 11 and fit with the outer peripheral surface of the valve port 11, and the inside of the valve port member 1 cannot communicate with other parts of the limiting channel 34, achieving the sealing of the valve port 11.

[0049] In some embodiments, at least two flow holes 30 are distributed circumferentially along the limiting sleeve 3 to form a flow hole group; at least two flow hole groups are distributed axially on the limiting sleeve 3.

[0050] When the one-way valve opens, the fluid flows from the valve port 11 into the limiting channel 34, and then passes through the flow holes 30 into the valve seat 4. The one-way valve can be connected to the pipeline through the valve seat 4, and the fluid flows into the pipeline through the valve seat 4. At least two flow hole groups are distributed axially on the limiting sleeve 3, which can enable the limiting sleeve 3 to have a larger flow area. Of course, the user can also set the number of flow hole groups according to needs. For example, only one flow hole group can be provided in the limiting sleeve 3, and no limitation is made here.

[0051] Optionally, the length of at least two flow hole groups corresponding to the axial direction of the limiting sleeve 3 can be greater than the length of the valve core body 21 in the axial direction. During the process of closing the one-way valve, there is a situation where fluid flows through both sides of the valve core 2. Specifically, during the valve closing process, the valve core 2 moves to the area corresponding to the flow hole group, and there are flow holes 30 that are not completely blocked at both ends of the valve core body 21. At this time, the second end of the limiting sleeve 3 is communicated with the flow holes 30 through the limiting channel 34, and the flow holes 30 at both ends of the valve core body 21 are communicated by the space outside the limiting sleeve 3. The flow holes 30 near the first end of the limiting sleeve 3 are communicated with the valve port 11 through the limiting channel 34. The fluid passes through the second end of the limiting sleeve 3, the limiting channel 34 and the flow holes 30 and flows to the space outside the limiting sleeve 3, and then passes through the flow holes 30 near the first end of the limiting sleeve 3 into the limiting channel 34, and finally flows into the valve port 11. The above process is very short during the valve closing process of the one-way valve, and the fluid flow will wash away the particles in the limiting channel 34, reducing the risk of the valve core 2 being stuck.

[0052] Optionally, the second end of the limiting sleeve 3 has a limiting structure 33 for limiting the valve core 2.

[0053] Such as Figure 1As shown, the second end of the limit sleeve 3 can be bent in the axial direction to form a limit structure 33. The inner diameter of the limit structure 33 is smaller than the diameter of the valve core body 21, so it can play a role in limiting the valve core body 21. Of course, the limit structure 33 can also adopt structures such as limit columns and limit protrusions, which are not limited here. In this embodiment, the limit structure 33 can be formed by stamping a tubular profile, which can reduce the processing difficulty of the limit sleeve 3 and improve the processing efficiency. Of course, the processing method of the limit sleeve 3 is not limited to this.

[0054] In some embodiments, the diameter of the valve port 11 gradually increases in the direction close to the second end of the limit sleeve 3, and the diameter of the sealing portion 22 gradually increases in the direction close to the second end of the limit sleeve 3.

[0055] As Figure 1 and Figure 4 As shown, the diameter of the valve port 11 gradually increases in the direction close to the second end of the limit sleeve 3, and the diameter of the sealing portion 22 also gradually increases in the direction close to the second end of the limit sleeve 3. The minimum diameter of the sealing portion 22 can be less than or equal to the minimum diameter of the valve port 11, and the maximum diameter of the sealing portion 22 can be greater than or equal to the diameter of the valve port 11. Therefore, the sealing portion 22 can penetrate into the valve port 11 and fit with the inner peripheral surface of the valve port 11 to achieve the sealing of the valve port 11. In this embodiment, both the valve port 11 and the sealing portion 22 taper in the direction away from the second end of the limit sleeve 3, which can increase the contact area between the sealing portion 22 and the inner peripheral surface of the valve port 11, and further improve the sealing performance between the valve core 2 and the valve port 11.

[0056] In some embodiments, the valve port member 1 has a large-diameter section 12 and a small-diameter section 13, and the first end of the limit sleeve 3 is sleeved on the outer periphery of the small-diameter section 13.

[0057] The large-diameter section 12 and the small-diameter section 13 of the valve port member 1 are coaxially arranged, and the valve port 11 is located at one end of the small-diameter section 13 away from the large-diameter section 12. The outer diameter of the large-diameter section 12 is greater than the outer diameter of the small-diameter section 13. The first end of the limit sleeve 3 is sleeved on the outer periphery of the small-diameter section 13, and the large-diameter section 12 can limit the limit sleeve 3 axially. The limit sleeve 3 and the small-diameter section 13 can be fixed by welding, bonding or interference fit, etc. The valve port member 1 can be formed by stamping or cutting, etc.

[0058] Embodiment 1

[0059] In some embodiments, the flow-through hole group includes a first flow-through hole group and a second flow-through hole group. Each flow-through hole 30 in the first flow-through hole group is a first flow-through hole 31; each flow-through hole 30 in the second flow-through hole group is a second flow-through hole 32; the second flow-through holes 32 and the first flow-through holes 31 are staggered in the circumferential direction of the limit sleeve 3.

[0060] As Figures 1 to 6As shown, the first flow-through hole 31 and the second flow-through hole 32 are staggered in the circumferential direction of the limit sleeve 3, that is, the positions of the first through-hole and the second through-hole in the circumferential direction of the limit sleeve 3 do not coincide. As Figure 1 and Figure 2 shown, the limit sleeve 3 has two first through-holes and two second through-holes. In the figure, the two first through-holes are respectively located on the upper side and the lower side of the limit sleeve 3, and the two first flow-through holes 31 are arranged close to the second end of the limit sleeve 3. The two second through-holes are respectively located on the front side and the rear side of the limit sleeve 3. The positions of the two first through-holes in the axial direction of the limit sleeve 3 are the same, the positions of the two second through-holes in the axial direction of the limit sleeve 3 are the same, and the position of the first through-hole in the axial direction of the limit sleeve 3 partially overlaps with the position of the second through-hole in the axial direction of the limit sleeve 3. Due to the staggered distribution of the first through-hole and the second through-hole, the influence between them is reduced, so a larger diameter can be adopted, thereby increasing the area for fluid to flow through. Of course, the user can set the number of flow-through hole groups according to needs. For example, the user can set multiple flow-through hole groups, and the first flow-through hole group and the second flow-through hole group can be alternately distributed in the axial direction of the limit sleeve 3.

[0061] Embodiment 2

[0062] In some embodiments, the positions of the flow-through holes 30 in each flow-through hole group correspond to each other in the circumferential direction of the limit sleeve 3.

[0063] As Figure 7 and Figure 8 shown, the limit sleeve 3 has two flow-through hole groups, each flow-through hole group includes four flow-through holes 30, and the positions of the flow-through holes 30 in the two flow-through hole groups correspond to each other in the circumferential direction of the limit sleeve 3, that is, the two corresponding flow-through holes 30 are distributed along the direction parallel to the axis of the limit sleeve 3. In this embodiment, the arrangement of the flow-through holes 30 is relatively neat, reducing the processing difficulty of the flow-through holes 30 on the limit sleeve 3.

[0064] It should be noted that, in addition to the above two embodiments, the flow-through holes 30 can also adopt other arrangement methods. For example, the flow-through holes 30 can be arranged along a spiral line on the outer surface of the limit sleeve 3, which is not limited here.

[0065] According to the second aspect of the present application, a one-way valve is also disclosed, including a valve seat 4 and the valve core 2 assembly in any of the above embodiments. The valve seat 4 has a through installation channel 42, and the valve core 2 assembly is fixed in the installation channel 42.

[0066] As Figure 1 and Figure 7 shown, the valve seat 4 can be in a cylindrical shape, and the inside of the valve seat 4 is the installation channel 42. The valve core 2 assembly can be fixed in the installation channel 42 by welding, clamping or bonding, etc. The valve seat 4 has a first end and a second end. The first end of the valve seat 4 is close to the valve port member 1, and the second end of the valve seat 4 is close to the second end of the limit sleeve 3.

[0067] In some embodiments, the outer peripheral surface of the valve port member 1 has a connecting groove 14 provided along the circumferential direction of the valve port member 1, and the valve seat 4 has a connecting structure 41 that abuts against the connecting groove 14.

[0068] In Figure 7 and Figure 8 In the specific embodiment shown, the connecting structure 41 cooperates with the connecting groove 14 to fix the valve port member 1. The valve port member 1 may include a large-diameter section 12 and a small-diameter section 13, and the connecting groove 14 is provided on the outer peripheral surface of the large-diameter section 12. The valve port member 1 is installed in the valve seat 4, and the limiting sleeve 3 is formed with the connecting structure 41 by stamping. The connecting structure 41 abuts against the inner wall of the connecting groove 14, thereby fixedly connecting the valve port member 1 and the limiting sleeve 3.

[0069] In some embodiments, the bottom of the connecting groove 14 has a convex structure 15 for abutting against the connecting structure 41.

[0070] As Figure 7 and Figure 8 shown, the convex structure 15 extends along the circumferential direction of the valve port member 1 and surrounds the valve port member 1. The valve seat 4 is formed with the connecting structure 41 by stamping, and the connecting structure 41 fits with the convex structure 15. The connecting structure 41 and the convex structure 15 can improve the sealing performance between the valve seat 4 and the valve port member 1 and reduce the leakage of fluid. Of course, the convex structure 15 can also adopt other shapes. For example, the convex structure 15 is spiral, and packing can also be provided in the connecting groove 14 to improve the sealing performance of the check valve, which is not limited herein.

[0071] Optionally, the number of the convex structures 15 can be multiple, and the multiple convex structures 15 are axially distributed along the valve port member 1. In Figure 7 and Figure 8 the specific embodiment shown, the number of the convex structures 15 is three, and the three convex structures 15 are axially distributed along the valve port member 1. The three convex structures 15 all abut against the connecting structure 41, further improving the sealing performance of the check valve. Of course, the number of the convex structures 15 is not limited to this.

[0072] In some embodiments, the valve port member 1 is arranged in the installation channel 42. The valve port member 1 has an inlet flow socket for installing the inlet flow pipeline, and a welding groove can be formed among the end face of the valve port member 1, the inner wall of the installation channel 42, and the inlet flow pipeline.

[0073] The valve port member 1 has an inlet flow socket, and the diameter of the inlet flow socket can be equal to or slightly larger than the outer diameter of the inlet flow pipeline. The inlet flow pipeline is in plug-in fit with the inlet flow socket. One end of the valve port member 1 away from the valve port 11 has an end face, which is located in the installation channel 42 and is at a preset distance from the end face of the valve seat 4. After the inlet flow pipeline is inserted into the inlet flow socket, a welding groove can be formed among the end face of the valve port member 1, the inner wall of the installation channel 42, and the inlet flow pipeline.

[0074] The valve seat 4, the valve port member 1, and the inflow pipeline can be fixed by welding. The welding groove can accommodate solder. After the solder melts, the valve seat 4, the valve port member 1, and the inflow pipeline are fixed. The welding groove can increase the accommodation capacity of the solder, thereby increasing the contact area between the solder and the valve seat 4 and the inflow pipeline, and improving the firmness of the connection between the valve seat 4, the valve port member 1, and the inflow pipeline. Of course, the valve seat 4, the valve port member 1, and the inflow pipeline can also be connected by other methods, such as interference fit, bonding, etc., which are not limited herein.

[0075] Optionally, in Figures 1 to 6 the specific embodiment shown, one end of the valve seat 4 away from the valve port member 1 has an outflow socket for plugging and mating with the outflow pipeline. One end of the valve seat 4 away from the valve port member 1 can be formed with an outflow socket by stamping. The outflow pipeline can be plugged and mated with the outflow socket. The inner diameter of the outflow plugging portion can be equal to the outer diameter of the outflow pipeline. The valve seat 4 also has a limiting portion, and the inner diameter of the limiting portion can be smaller than the inner diameter of the outflow plugging portion. Therefore, the limiting portion can limit the outflow pipeline axially. Of course, the valve seat 4 can also be provided with an outflow socket by other methods, which are not limited herein.

[0076] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present application. However, the present application is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present application, and these modifications and improvements are also regarded as the protection scope of the present application.

Claims

1. A spool valve assembly, characterized in that, Comprising: A valve port member (1) having a valve port (11); A limit sleeve (3) having a first end and a second end, the limit sleeve (3) further having a limit channel (34) penetrating from the first end to the second end, the first end of the limit sleeve (3) being connected to the valve port member (1), and the side wall of the limit channel (34) having flow holes; A valve core (2) movably disposed within the limit channel (34), the valve core (2) being in limit fit with the limit sleeve (3), and the valve core (2) opening or closing the valve port (11) by moving; The distance between the flow hole and the second end of the limit sleeve (3) is less than the distance between the valve core (2) and the second end of the limit sleeve (3) when the valve port (11) is closed.

2. The spool assembly according to claim 1, characterized in that, At least two of the flow holes are circumferentially distributed along the limit sleeve (3) to form a flow hole group; At least two of the flow hole groups are axially distributed on the limit sleeve (3).

3. The spool assembly according to claim 2, wherein, The flow hole group includes a first flow hole group and a second flow hole group, and each of the flow holes in the first flow hole group is a first flow hole (31); Each of the flow holes in the second flow hole group is a second flow hole (32); The second flow holes (32) and the first flow holes (31) are staggered in the circumferential direction of the limit sleeve (3).

4. The spool assembly according to claim 2, characterized in that The flow holes in each of the flow hole groups are circumferentially corresponding in position on the limit sleeve (3).

5. The spool assembly according to claim 1, characterized in that, The valve core (2) has a valve core body (21) and a plugging portion (22), the plugging portion (22) being used to plug the valve port (11), and the valve core body (21) being in limit fit with the limit sleeve (3).

6. The valve core assembly according to claim 5, characterized in that The second end of the limit sleeve (3) has a limit structure (33) for limiting the valve core (2).

7. The spool assembly according to claim 5, wherein, The diameter of the valve port (11) gradually increases in the direction close to the second end of the limit sleeve (3), and the diameter of the plugging portion (22) gradually increases in the direction close to the second end of the limit sleeve (3).

8. The valve core assembly according to claim 1, characterized in that The valve port member (1) has a large-diameter section (12) and a small-diameter section (13), and the first end of the limit sleeve (3) is sleeved on the outer periphery of the small-diameter section (13).

9. A one-way valve, characterized in that, Comprising a valve seat (4) and the valve core assembly according to any one of claims 1 to 8, the valve seat (4) having a through installation channel (42), and the valve core assembly being fixed within the installation channel (42).

10. The one-way valve according to claim 9, characterized in that, The outer peripheral surface of the valve port member (1) has a connection groove (14) provided along the circumferential direction of the valve port member (1), and the valve seat (4) has a connection structure (41) abutting against the connection groove (14).

11. The one-way valve according to claim 10, characterized in that, The bottom of the connection groove (14) has a convex structure (15) for abutting against the connection structure (41).

12. The one-way valve according to claim 9, characterized in that, The valve port member (1) is disposed within the installation channel (42), the valve port member (1) having an inlet flow insertion port for installing an inlet flow pipeline, and a welding groove can be formed among the end face of the valve port member (1), the inner wall of the installation channel (42), and the inlet flow pipeline.

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