One-way valve

Abstract

The utility model belongs to the technical field of valves, and discloses a one-way valve. The one-way valve comprises a valve seat, a valve sleeve, a valve element and a spring, one end of the valve seat is sleeved outside one end of the valve sleeve, the valve sleeve is provided with an oil inlet and an oil outlet, the valve element is arranged in the valve sleeve in a sliding mode so as to open a channel from the oil inlet to the oil outlet in a one-way mode, one end of the spring abuts against the valve element, the other end of the spring abuts against the valve seat, and a first clamping groove is formed in the inner wall of the valve seat in the circumferential direction. A second clamping groove at least partially corresponding to the first clamping groove is formed in the outer wall of the valve sleeve, the check ring is arranged outside the valve sleeve in a sleeving mode, a part of the check ring is located in the first clamping groove, and the other part of the check ring is located in the second clamping groove. According to the check valve provided by the utility model, the check ring is adopted to realize the connection between the valve seat and the valve sleeve, the check valve is convenient to mount and dismount, the problem that the valve core is blocked can be avoided, meanwhile, higher torque can be applied when the valve sleeve is connected with the valve seat, and the highest working pressure of a product is improved.

Description

Technical Field

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

[0002] A one-way valve, also known as a check valve or non-return valve, is a fluid control device primarily used to allow fluid to flow in one direction within a pipeline or system while preventing it from flowing in the opposite direction. A one-way valve primarily consists of a valve seat, a valve sleeve, a valve core, and a spring. The valve seat is mounted on one end of the valve sleeve, which is provided with an oil inlet and an oil outlet. The valve core slides within the valve sleeve to switch the connection between the oil inlet and the oil outlet. One end of the spring abuts the valve core, while the other end abuts the valve seat. Pressurized oil enters from the oil inlet. When the force acting on the valve core is greater than the spring force, the valve core moves to connect the oil inlet and the oil outlet, allowing the pressurized oil to flow out of the oil outlet while simultaneously blocking the flow of pressurized oil from the oil outlet to the oil inlet.

[0003] In the prior art, a threaded connection is typically used between the valve sleeve and valve seat. This connection has the following disadvantages: when the gap between the valve core and valve sleeve is small, excessive installation torque can cause deformation of the threads, leading to misalignment between the valve sleeve and valve core, which can cause the valve core to become stuck and unable to move. Furthermore, under long-term high pressure, the threaded connection can easily loosen, resulting in an unstable product connection, resulting in a low operating pressure.

[0004] Therefore, there is an urgent need to provide a one-way valve to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a one-way valve that is easy to install and disassemble, and can avoid the problem of valve core getting stuck. At the same time, a higher torque can be applied when the valve sleeve and the valve seat are connected, and the maximum working pressure of the product can be increased.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] A one-way valve includes a valve seat, a valve sleeve, a valve core and a spring. One end of the valve seat is sleeved on the outside of one end of the valve sleeve. The valve sleeve is provided with an oil inlet and an oil outlet. The valve core is slidably arranged in the valve sleeve to open the passage from the oil inlet to the oil outlet in one direction. One end of the spring abuts against the valve core, and the other end abuts against the valve seat. The inner wall of the valve seat is provided with a first groove along the circumferential direction, and the outer wall of the valve sleeve is provided with a second groove at least partially corresponding to the first groove. The one-way valve also includes a retaining ring, which is sleeved on the outside of the valve sleeve, and the retaining ring is partially located in the first groove, and the remaining part is located in the second groove.

[0008] As an optional solution, along the axial direction of the valve seat, the width of the first groove is greater than or equal to the wire diameter of the retaining ring.

[0009] As an optional solution, the width of the second clamping groove is greater than the diameter of the blocking ring along the axial direction of the valve sleeve.

[0010] As an optional solution, the valve sleeve is provided with a guide inclined surface near one end of the valve seat.

[0011] As an optional solution, the blocking ring has a non-closed oval shape in a natural state.

[0012] As an optional solution, the opposite ends of the blocking ring along the long axis direction are respectively located in the first clamping groove, and the opposite ends of the blocking ring along the short axis direction are respectively located in the second clamping groove.

[0013] As an optional solution, the valve core comprises a sealing part and a sliding guide part connected to each other, the outer diameter of the sliding guide part is greater than the outer diameter of the sealing part, the outer peripheral surface of the sliding guide part is in sliding guide cooperation with the inner peripheral surface of the valve sleeve, and the sealing part is used for sealingly closing the oil inlet.

[0014] As an optional solution, the valve core further comprises a rod part connected to one end of the sliding guide part away from the sealing part, the outer diameter of the rod part is smaller than the outer diameter of the sliding guide part, one end of the spring is in abutment with the valve seat, and the other end of the spring is sleeved outside the rod part and in abutment with the stepped surface between the rod part and the sliding guide part.

[0015] As an optional solution, a tapered sealing surface is formed at one end of the sealing part away from the sliding guide part.

[0016] As an optional solution, the oil inlet is formed at one end of the valve sleeve away from the valve seat along the axial direction, the oil outlet is formed on the peripheral side of the valve sleeve, and the oil outlet is provided in a plurality of forms, and the plurality of oil outlets are arranged at intervals and uniformly around the valve sleeve.

[0017] The beneficial effects of the utility model are as follows:

[0018] The utility model provides a check valve, the inner wall of valve seat is provided with first clamping groove along the circumference, the outer wall of valve sleeve is provided with second clamping groove in the position corresponding to first clamping groove, and the blocking ring is sleeved outside valve sleeve, and the blocking ring is partially located in first clamping groove, and the rest is located in second clamping groove. Therefore, the check valve adopts the blocking ring to realize the connection between valve seat and valve sleeve, cancels the threaded connection, reduces the processing cost, facilitates installation and removal, and can avoid the problem that the valve core is jammed due to the different shafts of valve sleeve and valve core, simultaneously adopts the blocking ring connection, can exert higher torque when valve sleeve and valve seat are connected, and the connection between valve sleeve and valve seat is stable, and is not easy to loosen, thereby the highest working pressure of product can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the one-way valve provided by the utility model;

[0020] Figure 2 It is a cross-sectional view of the one-way valve provided by the utility model;

[0021] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle;

[0022] Figure 4 It is a structural schematic diagram of the retaining ring provided by the utility model.

[0023] In the picture:

[0024] 1. Valve seat; 11. First slot;

[0025] 2. Valve sleeve; 21. Oil inlet; 22. Oil outlet; 23. Second slot; 24. Guide slope;

[0026] 3. Valve core; 31. Sealing portion; 311. Conical sealing surface; 32. Sliding guide portion; 33. Rod portion; 34. Oil drain hole;

[0027] 4. Spring;

[0028] 5. Retaining ring; 51. Adjusting opening. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0030] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0031] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0032] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0033] like Figure 1 and Figure 2 As shown, this embodiment provides a one-way valve, including a valve seat 1, a valve sleeve 2, a valve core 3 and a spring 4. One end of the valve seat 1 is sleeved on the outside of one end of the valve sleeve 2. The valve sleeve 2 is provided with an oil inlet 21 and an oil outlet 22. The valve core 3 is slidably arranged in the valve sleeve 2 to open the passage from the oil inlet 21 to the oil outlet 22 in one direction. One end of the spring 4 abuts against the valve core 3, and the other end abuts against the valve seat 1. Figure 2 The pressure oil enters from the oil inlet 21, and the liquid pressure acts on the right end face of the valve core 3. When the liquid pressure acting on the valve core 3 is greater than the elastic force of the spring 4, the valve core 3 moves to the left to open the oil inlet 21. At this time, the oil inlet 21 and the oil outlet 22 are connected, and the pressure oil flows out from the oil outlet 22. The pre-compression force of the spring 4 is the closing pressure of the one-way valve, thereby cutting off the pressure oil from the oil outlet 22 to the oil inlet 21.

[0034] like Figure 1 As shown, an oil inlet 21 is provided at one axial end of the valve sleeve 2 away from the valve seat 1, and an oil outlet 22 is provided on the circumferential side of the valve sleeve 2. Multiple oil outlets 22 are provided, and the multiple oil outlets 22 are spaced and evenly arranged around the circumference of the valve sleeve 2. After the pressurized oil enters through the oil inlet 21, it can flow out simultaneously through the multiple oil outlets 22, thereby ensuring the flow rate of the oil inlet and outlet.

[0035] In the prior art, a threaded connection is typically used between the valve sleeve 2 and the valve seat 1. This connection has the following disadvantages: when the gap between the valve core 3 and the valve sleeve 2 is small, excessive installation torque can cause deformation of the threads, resulting in misalignment between the valve sleeve 2 and the valve core 3, which can cause the valve core 3 to become stuck and unable to move. Furthermore, when subjected to high pressure for a long time, the threaded connection can easily loosen, resulting in an unstable product connection, and thus a low operating pressure.

[0036] In order to solve the above problems, Figure 2 and Figure 3 As shown, in this embodiment, the inner wall of the valve seat 1 is provided with a first retaining groove 11 along the circumferential direction, and the outer wall of the valve sleeve 2 is provided with a second retaining groove 23 that at least partially corresponds to the first retaining groove 11 in the axial direction. The one-way valve also includes a retaining ring 5, which is sleeved on the outside of the valve sleeve 2, with the retaining ring 5 partially located in the first retaining groove 11 and the remaining part located in the second retaining groove 23. It should be noted that this is the case without considering the assembly gap between the valve sleeve 2 and the valve seat 1. During installation, the outer ring of the retaining ring 5 is first retained in the first retaining groove 11 of the valve seat 1, and then one end of the valve sleeve 2 is inserted into the valve seat 1. During the insertion process, the inner ring of the retaining ring 5 gradually inserts into the second retaining groove 23, thereby achieving the purpose of connecting the valve sleeve 2 and the valve seat 1.

[0037] The one-way valve adopts a retaining ring 5 to achieve a reliable connection between the valve seat 1 and the valve sleeve 2, limiting the axial movement of the valve sleeve 2 to form a stop, eliminating the threaded connection, reducing processing costs, facilitating installation and disassembly, and avoiding the problem of the valve sleeve 2 and the valve core 3 being stuck due to the misalignment of the valve sleeve 2 and the valve core 3. At the same time, the retaining ring 5 is used for connection, and a higher torque can be applied when the valve sleeve 2 and the valve seat 1 are connected. The connection between the valve sleeve 2 and the valve seat 1 is stable and not easy to loosen, thereby increasing the maximum working pressure of the product, making the one-way valve suitable for occasions with higher working pressures.

[0038] In an optional embodiment, the width of the first retaining groove 11 along the axial direction of the valve seat 1 is greater than the wire diameter of the retaining ring 5. This configuration facilitates the installation and engagement of the retaining ring 5. In another optional embodiment, the width of the first retaining groove 11 along the axial direction of the valve seat 1 can also be equal to the wire diameter of the retaining ring 5, which is not specifically limited here.

[0039] In an optional embodiment, the width of the second retaining groove 23 along the axial direction of the valve sleeve 2 is greater than the diameter of the retaining ring 5, so that there is an axial gap between the sidewall of the second retaining groove 23 and the retaining ring 5. This arrangement creates an axial floating connection between the valve sleeve 2 and the valve seat 1. When the valve sleeve 2 is installed within the valve seat 1, the valve sleeve 2 has a certain amount of left and right floating, which can prevent the valve core 3 from being stuck due to increased installation torque of the valve sleeve 2. At the same time, the floating structure design can reduce the impact of the coaxiality between the valve core 3 and the valve sleeve 2 on leakage.

[0040] refer to Figure 4 In its natural state, the shape formed by the retaining ring 5 is a non-closed ellipse. It should be noted that the "natural state" here refers to the state of the retaining ring 5 without any external force. Since the retaining ring 5 is a non-closed ellipse, it has a major axis a and a minor axis b. When the valve sleeve 2 and the valve seat 1 are assembled, the two opposite ends of the retaining ring 5 along its major axis a are respectively located in the first groove 11, and the two opposite ends of the retaining ring 5 along its minor axis b are respectively located in the second groove 23, thereby forming a stable connection between the valve sleeve 2 and the valve seat 1. The retaining ring 5 is provided with an adjustment opening 51 at one end along its major axis a to facilitate the expansion adjustment of the retaining ring 5.

[0041] Furthermore, if Figure 3 As shown, the valve sleeve 2 is provided with a guide slope 24 at one end close to the valve seat 1, and the guide slope 24 is arranged adjacent to the second clamping groove 23. By providing the guide slope 24, it is convenient for the valve sleeve 2 to open the retaining ring 5 for installation.

[0042] During installation, first install the retaining ring 5 in the first groove 11 of the valve seat 1. Since the retaining ring 5 is elliptical, the two opposite ends of the retaining ring 5 along its long axis a direction can be locked in the first groove 11. Then, one end of the valve sleeve 2 is inserted into the valve seat 1. During the insertion process, the two opposite ends of the retaining ring 5 along its short axis b direction can be gradually stretched open and finally buckled into the second groove 23 through the guide inclined surface 24 on the valve sleeve 2. At this time, the two opposite ends of the retaining ring 5 along its long axis a direction are respectively located in the first groove 11, and the two opposite ends of the retaining ring 5 along its short axis b direction are respectively located in the second groove 23, thereby achieving the purpose of connecting the valve sleeve 2 and the valve seat 1 and improving assembly efficiency.

[0043] like Figure 2 As shown, the valve core 3 includes a connected sealing portion 31 and a sliding guide portion 32. The outer diameter of the sliding guide portion 32 is larger than that of the sealing portion 31 and is adapted to the inner diameter of the valve sleeve 2. The outer circumference of the sliding guide portion 32 slides and guides with the inner circumference of the valve sleeve 2. The sealing portion 31 is used to seal and close the oil inlet 21. When the valve core 3 moves, the sliding guide portion 32 cooperates with the valve sleeve 2 to guide the movement of the valve core 3, ensuring the coaxiality of the valve sleeve 2 and the valve core 3, preventing the valve core 3 from getting stuck, and reducing the leakage of hydraulic oil into the cavity where the spring 4 is located through the gap between the valve core 3 and the valve sleeve 2.

[0044] Furthermore, if Figure 2 As shown, a conical sealing surface 311 is formed at one end of the sealing portion 31 away from the sliding guide portion 32. When the sealing portion 31 seals the oil inlet 21, the conical sealing surface 311 contacts the end of the oil inlet 21 to form a seal. The sealing surface is a line contact seal formed by the annular line and the conical surface, which has a good sealing effect.

[0045] Furthermore, if Figure 2 As shown, the valve core 3 also includes a rod 33, which is connected to the end of the sliding guide 32 away from the sealing portion 31. The outer diameter of the rod 33 is smaller than that of the sliding guide 32. One end of the spring 4 abuts the valve seat 1, and the other end of the spring 4 is sleeved outside the rod 33 and abuts the stepped surface between the rod 33 and the sliding guide 32. The rod 33 supports the spring 4, so that the spring 4 can only deform along its axial direction, ensuring stable and reliable operation of the spring 4.

[0046] like Figure 2 As shown, an oil drain hole 34 is provided in the valve core 3. One end of the oil drain hole 34 communicates with the cavity where the spring 4 is located, and the other end of the oil drain hole 34 communicates with the oil outlet 22. Hydraulic oil that leaks into the cavity where the spring 4 is located through the gap between the valve core 3 and the valve sleeve 2 can be discharged through the oil drain hole 34 in the valve core 3 and the oil outlet 22, ensuring the normal operation of the one-way valve.

[0047] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A one-way valve, comprising a valve seat (1), a valve sleeve (2), a valve core (3) and a spring (4), wherein one end of the valve seat (1) is sleeved on the outside of one end of the valve sleeve (2), the valve sleeve (2) is provided with an oil inlet (21) and an oil outlet (22), the valve core (3) is slidably arranged in the valve sleeve (2) to open a passage from the oil inlet (21) to the oil outlet (22) in one direction, one end of the spring (4) abuts against the valve core (3), and the other end abuts against the valve seat (1), characterized in that: The inner wall of the valve seat (1) is provided with a first groove (11) along the circumferential direction, and the outer wall of the valve sleeve (2) is provided with a second groove (23) at least partially corresponding to the first groove (11). The one-way valve also includes a retaining ring (5), which is sleeved on the outside of the valve sleeve (2), and the retaining ring (5) is partially located in the first groove (11), and the remaining part is located in the second groove (23).

2. The one-way valve according to claim 1, characterized in that: Along the axial direction of the valve seat (1), the width of the first clamping groove (11) is greater than or equal to the wire diameter of the retaining ring (5).

3. The one-way valve according to claim 1, characterized in that Along the axial direction of the valve sleeve (2), the width of the second clamping groove (23) is greater than the wire diameter of the retaining ring (5).

4. The one-way valve according to claim 1, characterized in that An end of the valve sleeve (2) close to the valve seat (1) is provided with a guide slope (24).

5. The one-way valve according to claim 1, characterized in that: In a natural state, the shape formed by the retaining ring (5) is a non-closed ellipse.

6. The one-way valve according to claim 5, characterized in that: The two opposite ends of the retaining ring (5) along its long axis are respectively located in the first clamping groove (11), and the two opposite ends of the retaining ring (5) along its short axis are respectively located in the second clamping groove (23).

7. The one-way valve according to any one of claims 1 to 6, characterized in that: The valve core (3) includes a sealing portion (31) and a sliding guide portion (32) connected to each other. The outer diameter of the sliding guide portion (32) is larger than the outer diameter of the sealing portion (31). The outer peripheral surface of the sliding guide portion (32) is slidingly guided with the inner peripheral surface of the valve sleeve (2). The sealing portion (31) is used to seal and close the oil inlet (21).

8. The one-way valve according to claim 7, characterized in that: The valve core (3) further comprises a rod portion (33), the rod portion (33) being connected to one end of the sliding guide portion (32) away from the sealing portion (31), the outer diameter of the rod portion (33) being smaller than the outer diameter of the sliding guide portion (32), one end of the spring (4) being in contact with the valve seat (1), and the other end of the spring (4) being sleeved outside the rod portion (33) and in contact with the step surface between the rod portion (33) and the sliding guide portion (32).

9. The one-way valve according to claim 8, characterized in that: A conical sealing surface (311) is formed at one end of the sealing portion (31) away from the sliding guide portion (32).

10. The one-way valve according to any one of claims 1 to 6, characterized in that: The oil inlet (21) is opened at an axial end of the valve sleeve (2) away from the valve seat (1), and the oil outlet (22) is opened at a circumferential side of the valve sleeve (2), and the oil outlet (22) is provided in plurality, and the plurality of oil outlets (22) are spaced and evenly arranged around the circumference of the valve sleeve (2).

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