One-way valve

Abstract

The utility model relates to the field of valves, in particular to a one-way valve, which comprises a valve body and a through cavity, two ends of the cavity are arranged in a through manner, a rubber plug is arranged in the cavity of the valve body and is matched with one end of the cavity of the valve body in a sealing or separating manner, and a valve tail is arranged at the other end of the cavity of the valve body. The elastic piece is arranged in the valve body, the two ends of the elastic piece are connected with the rubber plug and the valve tail respectively, the valve tail and the valve body form adjustable matching in the length direction of the cavity, the elastic piece is a spring, and the pre-compression amount of the elastic piece can be adjusted in the length direction of the cavity through the adjustable matching of the valve tail and the valve body, such as threaded connection or a sliding limiting structure. Therefore, the opening pressure threshold value of the rubber plug is accurately set, the problem of opening pressure difference caused by spring force difference is solved, and product consistency is guaranteed.

Description

Technical Field

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

[0002] One-way valves, as core components for achieving unidirectional fluid flow, are widely used in medical equipment, industrial automation, and automotive manufacturing. A typical structure of a traditional one-way valve includes a rubber stopper fixed to the upper end of a spring via a non-removable connection (such as adhesive bonding or ultrasonic welding), which is then assembled into the valve body and capped to form a sealed cavity. Its working principle is based on the pressure balance formula F=P·S. When the product of the pressure difference P generated by the forward airflow and the sealing surface area S of the rubber stopper exceeds the spring preload F, the rubber stopper overcomes the spring force and opens. During reverse airflow, the spring force and gas pressure work together to ensure a tight seal between the rubber stopper and the valve tail sealing line, thereby blocking reverse flow.

[0003] The core defect of existing technology is poor consistency in opening pressure: the opening pressure of traditional structures depends entirely on the spring force parameters, and springs have a spring force tolerance of ±10% in mass production. Actual measurements show that the opening pressure dispersion of products in the same batch varies significantly, seriously affecting the stability of system performance. Utility Model Content

[0004] The purpose of this utility model is to provide a one-way valve that aims to solve the problem of opening pressure difference caused by spring force difference in the above-mentioned technical problems, and to ensure product consistency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A one-way valve, comprising:

[0007] The valve body is provided with a through chamber, which is arranged through both ends;

[0008] A rubber stopper is disposed within the cavity of the valve body and forms a sealing or separating fit with one end of the cavity of the valve body;

[0009] The valve tail is located at the other end of the chamber of the valve body;

[0010] An elastic element is disposed within the valve body and its two ends are respectively connected to the rubber plug and the valve tail.

[0011] The valve tail and the valve body form an adjustable fit along the length of the chamber, and the elastic element is a spring.

[0012] This utility model also has the following technical features:

[0013] In one embodiment of this utility model, the valve body is made of polymer plastic, and the first section of the valve tail is provided with an external thread section, which is inserted into the inner wall of the valve body cavity.

[0014] In one embodiment of this utility model, a through hole is provided on the valve tail, and the through hole is used to connect the chamber of the valve body with the outside.

[0015] In one embodiment of the present invention, one end of the chamber of the valve body is closed, and the closed section is provided with a through hole, and the rubber plug and the through hole form a closed or separate fit.

[0016] In one embodiment of this utility model, an annular sealing protrusion is provided on the edge of the through hole, and the rubber plug and the annular sealing protrusion form a sealing fit.

[0017] In one embodiment of this utility model, the mating surface between the rubber stopper and the annular sealing protrusion is a plane.

[0018] In one embodiment of this utility model, the groove cross-section of the annular sealing protrusion is a trapezoid with a larger outer diameter and a smaller inner diameter, and the smaller end face of the annular sealing protrusion fits against the plane of the rubber stopper.

[0019] In one embodiment of this utility model, an enlarged section is provided at one end of the chamber of the valve body and the valve tail, and a sealing ring is provided on the outside of the tail section of the valve tail, with the sealing ring abutting against the inner wall of the enlarged section of the valve body.

[0020] In one embodiment of the present invention, an annular groove is provided on the outer wall of the tail section of the valve tail, the sealing ring is located in the annular groove, and an adjustment part for screwing is provided on the outer end of the valve tail.

[0021] In one embodiment of this utility model, the elastic element is a tower spring with one end larger than the other. An installation step is provided at the first end of the valve tail, and an insertion step is provided on the rubber plug. The tower spring is connected to the installation step and the insertion step respectively.

[0022] Compared with existing technologies, the beneficial effects of this utility model are as follows: through the adjustable fit between the valve tail and the valve body (such as threaded connection or sliding limit structure), the pre-compression amount of the elastic element can be adjusted along the length of the chamber, thereby accurately setting the opening pressure threshold of the rubber stopper, thus eliminating the problem of opening pressure difference caused by spring force difference and ensuring product consistency; during forward flow, the fluid pressure overcomes the pre-tightening force of the elastic element to push the rubber stopper away from the valve seat, resulting in smooth opening; during reverse flow, the rubber stopper tightly fits the valve seat under the action of the elastic element, forming a reliable seal and preventing backflow; the adjustable design ensures stable sealing performance under different pressures. Attached Figure Description

[0023] Figure 1 and Figure 2 These are schematic diagrams of the one-way valve from two different perspectives in one embodiment of this utility model;

[0024] Figure 3 This is a cross-sectional structural diagram of a one-way valve in one embodiment of the present invention;

[0025] Figure 4 This is a cross-sectional view of a one-way valve in another embodiment of the present invention;

[0026] Figure 5 and Figure 6 These are schematic diagrams of the valve tail from two different perspectives in one embodiment of this utility model;

[0027] Figure 7 This is a cross-sectional structural diagram of the valve body in one embodiment of the present invention;

[0028] Explanation of icon numbers:

[0029] 10. Valve body; 11. Expanded orifice section; 12. Through hole; 121. Annular sealing protrusion;

[0030] 20. Rubber stopper;

[0031] 30. Valve tail; 301. Annular groove; 31. External thread section; 32. Through hole; 33. Sealing ring; 34. Adjustment section

[0032] 40. Elastic components. Detailed Implementation

[0033] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model.

[0034] The illustrations provided in this embodiment are only schematic representations of the basic concept of this utility model. Therefore, the drawings only show the components related to this utility model and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0035] It should be noted that the core defect of existing one-way valves is poor consistency of opening pressure: the opening pressure of traditional structures depends entirely on the spring force parameter, and the spring force has a tolerance of ±10% in mass production; actual measurements show that the opening pressure dispersion of products in the same batch varies greatly, which seriously affects the stability of system performance. To address this, a one-way valve is proposed, comprising: a valve body 10, which has a through chamber arranged through both ends; a rubber plug 20, which is disposed in the chamber of the valve body 10 and forms a sealing or separating fit with one end of the chamber of the valve body 10; a valve tail 30, which is disposed at the other end of the chamber of the valve body 10; and an elastic element 40, which is disposed in the valve body 10 and whose two ends are respectively connected to the rubber plug 20 and the valve tail 30; wherein, the valve tail 30 and the valve body 10 form an adjustable fit along the length of the chamber, and the elastic element 40 is a spring.

[0036] In one embodiment, the elastic element 40 is a spring. The compression length of the elastic element 40 can be adjusted by adjusting the valve tail 30 along the length of the chamber of the valve body 10. Then, according to the spring force formula f=k·x, the spring force is obtained by K (spring coefficient) and X (compression length) to obtain the spring force of the elastic element 40 of the batch-produced check valves. This allows the opening pressure of the check valves in the same batch to be obtained. When there is a difference in the opening pressure of the check valves in different batches, the opening pressure of the check valves in different batches can be kept consistent by adjusting the valve tail 30 along the length of the chamber of the valve body 10, so as to ensure the consistency of the check valve products.

[0037] In one embodiment, see Figure 5 and Figure 6 The rubber stopper 20 can be made of rubber material and has a certain elastic deformation capability, so that when the rubber stopper 20 is combined with one end of the valve body 10, the sealing reliability can be ensured.

[0038] In one embodiment, to facilitate adjustment of the valve tail 30, the valve body 10 is made of polymer plastic, and the first section of the valve tail 30 is provided with an external thread section 31, which is inserted into the inner wall of the cavity of the valve body 10.

[0039] In actual adjustment, by rotating the valve tail 30, the external thread section 31 is rotated along the chamber of the valve body 10, thereby adjusting the compression length of the elastic element 40 to adjust the opening pressure of the check valve.

[0040] In one embodiment, the valve body 10 is preferably made of PUM material, and the external thread section 31 of the valve tail 30 is interference-fitted with the cavity of the valve body 10. By rotating the valve tail 30, the valve tail 30 can be driven into the valve body 10 to adjust the compression length of the elastic element 40.

[0041] In one embodiment, in order to achieve the through-hole of the chamber of the valve body 10, a through hole 32 is provided on the valve tail 30, and the through hole 32 is used to enable the chamber of the valve body 10 to communicate with the outside.

[0042] In one embodiment, the diameter of the through hole 32 should be adjusted according to different application scenarios of the one-way valve to adapt to the fluid conduction efficiency requirements of different application scenarios.

[0043] In one embodiment, see Figure 7 The valve body 10 has a closed chamber at one end, and the closed section is provided with a through hole 12. The rubber plug 20 and the through hole 12 form a closed or open fit.

[0044] In one embodiment, see Figure 7 The edge of the through hole 12 is provided with an annular sealing protrusion 121, and the rubber plug 20 and the annular sealing protrusion 121 form a sealing fit.

[0045] In one embodiment, the mating surface between the rubber stopper 20 and the annular sealing protrusion 121 is a plane.

[0046] In one embodiment, the mating surface between the rubber stopper 20 and the annular sealing protrusion 121 is a plane. When this one-way valve is applied in a system, the response accuracy of the separation or engagement of the rubber stopper 20 and the annular sealing protrusion 121 is very high, making it suitable for use in systems with high precision, such as the medical field.

[0047] In one embodiment, the groove cross-section of the annular sealing protrusion 121 is a trapezoid with a larger outer diameter and a smaller inner diameter, and the smaller end face of the annular sealing protrusion 121 is in contact with the plane of the rubber stopper 20.

[0048] In one embodiment, the small-sized end face of the annular sealing protrusion 121 is a small-sized plane. When the small-sized end face of the annular sealing protrusion 121 is in contact with the plane of the rubber stopper 20, the reliability of the seal can be ensured, and the response sensitivity of the one-way valve can be effectively improved. When the external pressure causes the rubber stopper 20 to separate from the annular sealing protrusion 121, the small-sized end face of the annular sealing protrusion 121 can quickly detach from the plane of the rubber stopper 20.

[0049] In one embodiment, to ensure a seal between the valve tail 30 and the valve body 10, an enlarged section 11 is provided at one end of the chamber of the valve body 10 and the valve tail 30, and a sealing ring 33 is provided on the outside of the tail section of the valve tail 30, with the sealing ring 33 abutting against the inner wall of the enlarged section of the valve body 10.

[0050] In one embodiment, see Figure 5 , Figure 6 and Figure 3The outer wall of the tail section of the valve tail 30 is provided with an annular groove 301, and the sealing ring 33 is located in the annular groove 301. In order to implement the screwing of the valve tail 30 and facilitate the adjustment of the elastic force of the entire elastic element 40, the outer end of the valve tail 30 is provided with an adjustment part 34 for screwing.

[0051] In one embodiment, see Figure 5 and Figure 6 and Figure 3 The adjustment part 34 is a straight or cross-shaped groove, which is convenient for screwing and adjusting with a screwdriver.

[0052] In one embodiment, an arrow is provided on the outer wall of the valve body 10, and the direction of conduction of the one-way valve can be determined by the arrow.

[0053] In another embodiment, see Figure 4 The adjustment part 34 is a manual rotating disc. One end of the valve tail 30 extends out of one end of the valve body 10, and the manual rotating disc is located at the extended end of the valve tail 30.

[0054] Specifically, the elastic element 40 is a tower spring with one end larger than the other. An installation step is provided at the first end of the valve tail 30, and an insertion step is provided on the rubber plug 20. The tower spring is connected to the installation step and the insertion step respectively.

[0055] In summary, the one-way valve of this utility model, through the adjustable cooperation between the valve tail 30 and the valve body 10, can adjust the pre-compression of the elastic element 40 along the length of the chamber, thereby accurately setting the opening pressure threshold of the rubber plug 20, thus eliminating the problem of opening pressure difference caused by spring force difference and ensuring product consistency.

[0056] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0057] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A one-way valve, characterized in that, include: The valve body (10) is provided with a through chamber, which is arranged through both ends; A rubber stopper (20) is disposed in the cavity of the valve body (10) and forms a sealing or separating fit with one end of the cavity of the valve body (10); The valve tail (30) is located at the other end of the chamber of the valve body (10); An elastic element (40) is disposed inside the valve body (10) and its two ends are respectively connected to the rubber plug (20) and the valve tail (30); The valve tail (30) and the valve body (10) are in an adjustable fit along the length of the chamber, and the elastic element (40) is a spring.

2. The one-way valve according to claim 1, characterized in that, The valve body (10) is made of polymer plastic, and the first section of the valve tail (30) is provided with an external thread section (31), which penetrates into the inner wall of the cavity of the valve body (10).

3. The one-way valve according to claim 1, characterized in that, A through hole (32) is provided on the valve tail (30), and the through hole (32) is used to enable the chamber of the valve body (10) to communicate with the outside.

4. The one-way valve according to claim 1, characterized in that, The valve body (10) has a closed chamber at one end, and the closed section is provided with a through hole (12). The rubber plug (20) and the through hole (12) form a closed or separate fit.

5. The one-way valve according to claim 4, characterized in that, The edge of the through hole (12) is provided with an annular sealing protrusion (121), and the rubber plug (20) and the annular sealing protrusion (121) form a sealing fit.

6. The one-way valve according to claim 5, characterized in that, The mating surface between the rubber stopper (20) and the annular sealing protrusion (121) is a plane.

7. The one-way valve according to claim 6, characterized in that, The groove cross-section of the annular sealing protrusion (121) is a trapezoid with a larger outer diameter and a smaller inner diameter, and the small-sized end face of the annular sealing protrusion (121) fits against the plane of the rubber stopper (20).

8. The one-way valve according to claim 2, characterized in that, The valve body (10) and the valve tail (30) are provided with an enlarged section (11) at one end of the chamber, and a sealing ring (33) is provided on the outside of the tail section of the valve tail (30). The sealing ring (33) abuts against the inner wall of the enlarged section of the valve body (10).

9. The one-way valve according to claim 8, characterized in that, The valve tail (30) has an annular groove (301) on its outer wall, and the sealing ring (33) is located in the annular groove (301). The valve tail (30) has an adjustment part (34) for screwing on its outer end.

10. The one-way valve according to claim 1, characterized in that, The elastic element (40) is a tower spring with one end larger than the other. An installation step is provided at the first end of the valve tail (30), and an insertion step is provided on the rubber plug (20). The tower spring is connected to the installation step and the insertion step respectively.

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