One-way valve

Abstract

A one-way valve comprises a valve body, a valve cavity is formed in the valve body, and a valve element and a reset elastic piece are installed in the valve cavity. The valve body is provided with an inlet and an outlet which are communicated to the valve cavity, the valve element opens or closes the inlet under the support of the reset elastic piece, a gap for oil to flow is formed between the side face of the valve element and the inner wall of the valve cavity, and a sealing piece is assembled at the inlet of the valve cavity and protrudes out of the surface of the valve cavity. A through hole coaxial with the inlet is formed in the middle of the sealing piece. Compared with the prior art, the pressure maintaining valve has the following beneficial technical effects that the sealing piece is integrated on the valve body, the valve element structure is simplified, and the manufacturing cost and the assembling complexity are reduced while the pressure maintaining performance is guaranteed.

Description

Technical Field

[0001] This utility model belongs to the field of one-way valve technology, and specifically relates to a one-way valve. Background Technology

[0002] In fluid control systems, check valves are critical components for ensuring stable system pressure. Traditional check valves typically employ a sealing method where the valve core and seat are in direct contact. Their core component (such as the valve core) must simultaneously perform sealing, guiding, and opening / closing functions. For example, a common design in existing technology achieves sealing through a precise fit between the outer wall of the valve core and the inner wall of the valve seat. However, this design has the following significant drawbacks:

[0003] 1. Existing check valves require their valve cores to simultaneously fulfill multiple functions, including sealing, guiding, and opening / closing, resulting in complex structural designs. For example, the valve core typically needs to integrate components such as sealing rings, guide sleeves, and limiting structures, which not only increases the number of parts but also requires complex designs for the valve core (such as sealing grooves for assembling the sealing rings), thus significantly increasing manufacturing costs.

[0004] 2. Since the sealing function relies on the direct contact between the valve core and the valve seat, wear or misalignment of the valve core will directly lead to seal failure. Especially under high pressure, high frequency opening and closing conditions or in the presence of particulate media, the friction between the valve core and the valve seat intensifies, accelerates the wear of the sealing surface, and ultimately causes leakage, affecting the pressure holding performance of the system.

[0005] Therefore, based on some of the situations in the prior art described above, this application has made further designs and improvements. Utility Model Content

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution.

[0007] A one-way valve includes a valve body, a valve cavity within the valve body, a valve core and a reset elastic element installed within the valve cavity; the valve body has an inlet and an outlet communicating with the valve cavity, the valve core opens or closes the inlet under the support of the reset elastic element, a gap for oil flow is formed between the side of the valve core and the inner wall of the valve cavity, a sealing element is assembled at the inlet of the valve cavity, the sealing element protrudes from the surface of the valve cavity; a through hole coaxially arranged with the inlet is provided in the middle of the sealing element.

[0008] Furthermore, a control head is provided on the valve core, and in the closed state, the control head is located inside the through hole.

[0009] Furthermore, the control head is a frustum shape, wider at the bottom and narrower at the top, with the lower part of the control head connected to the valve core; the inlet is cylindrical.

[0010] Furthermore, the through hole is frustum-shaped, and the control head is located inside the end with the smaller diameter of the through hole.

[0011] Furthermore, the sealing element includes an assembly part and a sealing part, and the valve cavity is provided with corresponding assembly grooves and sealing grooves. The outer diameter of the sealing part is smaller than that of the assembly part.

[0012] Furthermore, the outer diameter of the sealing part is smaller than the diameter of the sealing groove, and a deformation space is formed between the side wall of the sealing part and the inner wall of the sealing groove.

[0013] Furthermore, the valve body adopts a split design, including a lower shell and an upper shell, both of which have internal spaces. The internal spaces of the lower shell and the upper shell cooperate to form a valve cavity.

[0014] Furthermore, the reset elastic element is a compression spring, and an assembly post is provided at the tail end of the valve core. One end of the compression spring is mounted on the assembly post, and the other end abuts against the inner wall of the valve cavity.

[0015] Furthermore, the seal is made of rubber.

[0016] Compared with the prior art, this application has the following beneficial technical effects:

[0017] 1. By integrating the seal at the valve cavity inlet, the valve core only needs to perform opening, closing and guiding functions, which significantly reduces the number of valve core components and processing difficulty, and reduces manufacturing costs and assembly complexity.

[0018] 2. The seal is fixed in the assembly groove and sealing groove of the valve cavity, avoiding vibration and displacement caused by the movement of the valve core. This reduces wear on the seal due to dynamic friction and also avoids wear caused by direct contact between the valve core and the valve cavity. Simultaneously, the deformation space design between the sealing part and the inner wall of the sealing groove allows the rubber seal to deform moderately under pressure, enhancing the tightness of the sealing contact, thereby extending the service life of the seal and reducing the risk of leakage.

[0019] 3. The frustum-shaped through-hole in the center of the seal forms a precise fit with the valve core control head (a frustum-shaped head with a larger bottom and a smaller top). In the closed state, the control head is embedded in the smaller end of the through-hole, effectively blocking the backflow path of oil from the inlet to the valve cavity. Compared with the moving valve core seal, this fixed sealing structure can more accurately control the contact area and pressure distribution of the sealing surface, reducing the possibility of leakage.

[0020] 4. The structural design of the valve cavity fixed seal ensures its stability under high pressure or impact conditions, preventing seal failure due to vibration that could cause the valve core to move. The rubber seal material and its fit with the deformation space also accommodate material deformation caused by temperature changes, ensuring sealing reliability under harsh conditions. Attached Figure Description

[0021] Figure 1 This is a 3D view of a one-way valve.

[0022] Figure 2This is a cross-sectional view of a check valve.

[0023] Figure 3 This is an exploded view of a check valve.

[0024] The following is a description of the markings:

[0025] 100. Valve body; 110. Lower shell; 120. Upper shell; 121. Inlet; 122. Outlet; 123. Deformation space; 130. Seal; 131. Through hole;

[0026] 200. Valve core; 201. Control head; 202. Assembly column; 210. Reset elastic element. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0028] In the following embodiments, the same or similar reference numerals denote the same or similar components or components with the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0029] In the description of this utility model, it should be understood that the terms such as center, longitudinal, transverse, length, width, thickness, upper, lower, front, back, left, right, vertical, horizontal, top, bottom, inner, outer, clockwise, and counterclockwise, indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features shown. In the description of this utility model, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," etc., should be interpreted broadly, and those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Reference Figures 1 to 3A one-way valve includes a valve body 100, within which a valve cavity is provided. A valve core 200 and a reset elastic element 210 are installed within the valve cavity. The valve body 100 has an inlet 121 and an outlet 122 communicating with the valve cavity. The valve core 200, supported by the reset elastic element 210, opens or closes the inlet 121. A gap for oil flow is formed between the side of the valve core 200 and the inner wall of the valve cavity. A seal 130 is fitted at the inlet 121 of the valve cavity, protruding from the surface of the valve cavity. A through hole 131, coaxially aligned with the inlet 121, is provided in the center of the seal 130. This design integrates the seal 130 at the valve cavity inlet 121, allowing the valve core 200 to only perform opening, closing, and guiding functions, significantly reducing the number of components and processing difficulty of the valve core 200, and lowering manufacturing costs and assembly complexity.

[0031] The valve body 100 adopts a split design, including a lower shell 110 and an upper shell 120. Both the lower shell 110 and the upper shell 120 have internal spaces, which cooperate to form a valve cavity. When it is necessary to replace the seal 130 or other components, the upper and lower shells 110 can be easily separated for operation, without disassembling the entire valve body 100, greatly improving maintenance efficiency and reducing equipment downtime. The reset elastic element 210 is a compression spring. An assembly post 202 is provided at the tail end of the valve core 200. One end of the compression spring is mounted on the assembly post 202, and the other end abuts against the inner wall of the valve cavity. This structure ensures that the valve core 200 can accurately and stably reset after each action, guaranteeing the normal operation of the check valve. The elastic characteristics of the compression spring enable it to maintain a stable reset force under different operating conditions, further improving the reliability and stability of the check valve.

[0032] Furthermore, a control head 201 is provided on the valve core 200. In the closed state, the control head 201 is located within the through hole 131. The control head 201 is a frustum shape, wider at the bottom and narrower at the top, and its lower part is connected to the valve core 200; the inlet 121 is cylindrical. The through hole 131 is also frustum-shaped, with the control head 201 located within the smaller diameter end of the through hole 131. The frustum-shaped through hole 131 in the middle of the seal 130 forms a precise fit with the control head 201 (frustum-shaped, wider at the bottom and narrower at the top) of the valve core 200. In the closed state, the control head 201 is embedded in the smaller diameter end of the through hole 131, effectively blocking the backflow path of oil from the inlet 121 to the valve cavity. Compared with the moving seal of the valve core 200, this fixed sealing structure can more accurately control the contact area and pressure distribution of the sealing surface, reducing the possibility of leakage.

[0033] Furthermore, the seal 130 includes an assembly part and a sealing part. The valve cavity has corresponding assembly grooves and sealing grooves, with the outer diameter of the sealing part being smaller than that of the assembly part. The outer diameter of the sealing part is smaller than the diameter of the sealing groove, forming a deformation space 123 between the side wall of the sealing part and the inner wall of the sealing groove. The seal 130 is fixed in the assembly groove and sealing groove of the valve cavity, avoiding vibration and displacement caused by the movement of the valve core 200, reducing wear of the seal 130 due to dynamic friction, and also preventing wear caused by direct contact between the valve core 200 and the valve cavity. Simultaneously, the deformation space 123 between the sealing part and the inner wall of the sealing groove allows the rubber seal 130 to deform moderately under pressure, enhancing the tightness of the sealing contact, thereby extending the service life of the seal 130 and reducing the risk of leakage. In addition, the structural design of fixing the seal 130 in the valve cavity ensures its stability under high pressure or impact conditions, preventing seal failure due to vibration that might occur when the valve core 200 moves. The rubber seal 130, in conjunction with the deformation space 123, can also adapt to material deformation caused by temperature changes, ensuring sealing reliability under harsh working conditions.

[0034] The scope of protection of this utility model includes, but is not limited to, the above embodiments. The scope of protection of this utility model is defined by the claims. Any substitutions, modifications, or improvements to this technology that are easily conceived by those skilled in the art shall fall within the scope of protection of this utility model.

Claims

1. A one-way valve, comprising a valve body (100), a valve cavity being provided within the valve body (100), and a valve core (200) and a reset elastic element (210) being installed within the valve cavity; the valve body (100) being provided with an inlet (121) and an outlet (122) communicating with the valve cavity; the valve core (200) opening or closing the inlet (121) under the support of the reset elastic element (210); a gap for oil flow is formed between the side of the valve core (200) and the inner wall of the valve cavity, characterized in that, The valve cavity is fitted with a seal (130) at the inlet (121), and the seal (130) protrudes from the surface of the valve cavity; the seal (130) has a through hole (131) in the middle that is coaxial with the inlet (121).

2. A one-way valve according to claim 1, characterized in that, A control head (201) is provided on the valve core (200). When the valve is closed, the control head (201) is located in the through hole (131).

3. A one-way valve according to claim 2, characterized in that, The control head (201) is a frustum shape with a larger bottom and a smaller top. The lower part of the control head (201) is connected to the valve core (200); the inlet (121) is cylindrical.

4. A one-way valve according to claim 2, characterized in that, The through hole (131) is frustum shaped, and the control head (201) is located inside the smaller end of the through hole (131).

5. A one-way valve according to claim 1, characterized in that, The sealing element (130) includes an assembly part and a sealing part. The valve cavity is provided with corresponding assembly grooves and sealing grooves. The outer diameter of the sealing part is smaller than that of the assembly part.

6. A one-way valve according to claim 5, characterized in that, The outer diameter of the sealing part is smaller than the diameter of the sealing groove, and a deformation space is formed between the side wall of the sealing part and the inner wall of the sealing groove (123).

7. A one-way valve according to claim 1, characterized in that, The valve body (100) adopts a split design, including a lower shell (110) and an upper shell (120). Both the lower shell (110) and the upper shell (120) have internal spaces, and the internal spaces of the lower shell (110) and the upper shell (120) cooperate to form a valve cavity.

8. A one-way valve according to claim 1, characterized in that, The reset elastic element (210) is a compression spring. The valve core (200) has an assembly post (202) at its tail end. One end of the compression spring is mounted on the assembly post (202), and the other end abuts against the inner wall of the valve cavity.

9. A one-way valve according to claim 1, characterized in that, The seal (130) is made of rubber.

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