Miniature overflow valve

Abstract

This invention addresses the problem of complex and bulky existing overflow valves by providing a miniature overflow valve, comprising a filter, a throttling element, a valve core, a spring, a spring seat, and a valve body. The throttling element is located inside the tubular valve body, with one edge of the throttling element abutting against a stepped surface within the valve body. A spring seat is also fixedly installed inside the valve body, with the spring and valve core positioned between the spring seat and the throttling element. The spring pushes the valve core against the throttling element. The filter is located on one side of the throttling element relative to the valve core, with its end abutting against the throttling element. The spring seat has a first through-hole for liquid flow. The throttling element has a second through-hole for liquid flow, and the valve core has a corresponding top bead protruding from its end face. The valve core also has a third through-hole for liquid flow. This design achieves both pressure relief and miniaturization.

Description

Technical Field

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

[0002] A relief valve is a device used to protect pipelines and prevent excessive pressure. Existing relief valves fall into two main categories: spring-loaded and rod-loaded. Spring-loaded valves rely on a spring to press against a plug to achieve a seal, and when the pressure is too high, the spring pressure pushes the plug open to release pressure, as shown in patent application publication number CN120576140A. However, the complex structure of existing relief valves limits their size, making them difficult to fit into small pipelines, especially those used in hydraulic components. Therefore, a simpler, miniature relief valve is needed. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a miniature overflow valve.

[0004] To solve the above problems, the present invention adopts the following solution: A miniature overflow valve includes a filter, a throttling element, a valve core, a spring, a spring seat, and a valve body. The throttling element is located inside the tubular valve body, with one edge of the throttling element abutting against a stepped surface inside the valve body. A spring seat is also fixedly installed inside the valve body, with the spring and valve core located between the spring seat and the throttling element. The spring pushes the valve core against the throttling element. The filter is located on one side of the throttling element that is perpendicular to the valve core, with the end of the filter abutting against the throttling element. The spring seat has a first through hole for liquid flow. The throttling element has a second through hole for liquid flow, and the end of the valve core has a top bead corresponding to the second through hole, with the top bead protruding from the end face of the valve core. The valve core has a third through hole for liquid flow.

[0005] Furthermore, the top ball on the valve core is separately disposed from the valve core; a concave hole corresponding to the spherical top ball is provided at the end of the valve core.

[0006] Furthermore, the top bead is located on the axis of the valve core; the second through hole on the throttling element is also located on its axis.

[0007] Furthermore, the second through hole on the throttling device has a spherical concave hole at one end near the top bead.

[0008] Furthermore, the third through hole on the valve core includes a main passage and at least one secondary passage; the main passage and the secondary passage are connected; the main passage extends from one end of the valve core near the spring to the other side to a set depth; one end of the secondary passage is located around the concave hole on the valve core corresponding to the top ball, and the other end is connected to the main passage.

[0009] Furthermore, the valve core is provided with four secondary passages, which are arranged at equal angles about the axis of the valve core.

[0010] Furthermore, the end face of the valve core corresponding to the top ball is set as a conical surface.

[0011] Furthermore, the spring seat and the valve body are connected by a thread, and a "I" shaped cut is provided on the end face of the spring seat away from the spring.

[0012] Furthermore, it also includes a pin, which is embedded inside the valve body and located on the side of the spring seat away from the spring; the pin and the valve body are fitted with an interference fit, causing the outer side of the valve body to expand outward; a fourth through hole for the flow of liquid is provided on the axial part of the pin.

[0013] Furthermore, the outer side of the valve body is provided with several annular grooves in the area corresponding to the pin.

[0014] The beneficial effects of this utility model are as follows: By setting up an assembly structure of throttling element, valve core, spring, spring seat, valve body and pin, the overall structure is simplified, and while meeting the pressure relief requirements, miniaturization can be achieved to meet the needs of special equipment. By setting pins, the valve body can expand and support itself after installation, achieving a meshing and sealing with the outer contact surface; By setting an annular groove on the outside of the valve body, it is possible to facilitate the expansion of the valve body and ensure the sealing effect on the outside of the valve body after installation. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of Example 1; Figure 2 This is an exploded view of the overall structure of Example 1; Figure 3 This is a front view of the overall structure of Example 1; Figure 4 for Figure 3 BB section view; Figure 5 This is a schematic diagram of the valve core in Example 1.

[0016] Figure labeling: Throttling element 1, Second through hole 11, Valve core 2, Main passage 21, Secondary passage 22, Top ball 23, Spring 3, Spring seat 4, First through hole 41, "I" shaped cut 42, Valve body 5, Annular groove 51, Pin 6, Fourth through hole 61, Filter 7. Detailed Implementation

[0017] 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. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the figures only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components in the actual implementation. In the 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.

[0019] Example 1: like Figures 1-5 As shown, a miniature overflow valve includes a filter 7, a throttling element 1, a valve core 2, a spring 3, a spring seat 4, and a valve body 5. The throttling element 1 is located inside the tubular valve body 5, with one edge of the throttling element abutting against a stepped surface inside the valve body 5. A spring seat 4 is also fixedly installed inside the valve body 5, with the spring 3 and valve core 2 located between the spring seat 4 and the throttling element 1. The spring 3 pushes the valve core 2 against the throttling element 1. The filter 7 is located on the side of the throttling element 1 facing the valve core 2, with its end abutting against the throttling element 1, allowing filtered liquid to enter the space between the throttling element 1 and the filter. In the area between 7, the valve core 2 is compressed; the spring seat 4 is provided with a first through hole 41 for liquid flow; the throttling element 1 is provided with a second through hole 11 for liquid flow, and the end of the valve core 2 is provided with a top bead 23 corresponding to the second through hole 11. The top bead 23 protrudes from the end face of the valve core 2, so that the top bead 23 can be subjected to the elastic force of the spring 3 to press the second through hole 11 on the valve core 2, thereby blocking the valve core 2 and achieving a seal. In addition, a gap is formed between the valve core 2 and the throttling element 1 to facilitate liquid flow; the valve core 2 is provided with a third through hole for liquid flow. The liquid exerts pressure on the top bead 23 through the second through hole 11 on the throttling element 1. After the pressure exceeds the elastic force of the spring 3, the spring 3 is compressed, allowing the liquid to enter the third through hole on the valve core 2. Finally, it passes through the area of ​​the spring 3 and the first through hole 41 on the spring seat 4 to achieve pressure relief and avoid excessive pressure.

[0020] The top bead 23 on the valve core 2 is separately disposed from the valve core 2. A concave hole corresponding to the spherical top bead 23 is provided at the end of the valve core 2, so that the top bead can remain in the concave hole at the end of the valve core 2 and is not easy to fall out. The end face of the valve core 2 corresponding to the top bead 23 is set as a conical surface, which increases the gap space between the valve core 2 and the throttling element 1, so that the liquid can flow into the third through hole through the gap space. The top bead 23 is located on the axis of the valve core 2; the second through hole 11 on the throttling element 1 is also located on its axis, ensuring that the pressure and elastic force can be concentrated on the axis and avoid causing the valve core 2 to deflect.

[0021] The second through hole 11 on the throttling device 1 has a spherical concave hole at one end near the top bead 23, which facilitates the alignment of the top bead 23 and the blocking of the second through hole 11.

[0022] The third through hole on the valve core 2 includes a main passage 21 and at least one secondary passage 22. In this example, four secondary passages 22 are provided on the valve core 2, and these secondary passages 22 are spaced 90° apart about the axis of the valve core 2. The main passage 21 and the secondary passages 22 are connected. The main passage 21 extends from one end of the valve core 2 near the spring 3 to the other side to a set depth. One end of the secondary passage 22 is located around the concave hole on the valve core 2 corresponding to the top bead 23, and the other end is connected to the main passage 21.

[0023] The spring seat 4 and the valve body 5 are connected by a thread. A "I" shaped cut 42 is provided on the end face of the spring seat 4 away from the spring 3, which facilitates the rotation and fixing of the spring seat 4 to achieve the purpose of compressing the spring 3.

[0024] It also includes a pin 6, which is embedded inside the valve body 5 and located on the side of the spring seat 4 away from the spring 3. The pin 6 and the valve body 5 are interference-fitted, causing the outer side of the valve body 5 to expand outward. During installation, pressure is applied to the pin 6 by an external device, pressing it into the valve body 5, causing a slight expansion of the valve body 5, thereby installing the valve body 5 in an external pipeline or instrument. A fourth through hole 61 for liquid flow is provided on the axial part of the pin 6. Several annular grooves 51 are also provided on the outer side of the valve body 5 corresponding to the area of ​​the pin 6, which facilitates the expansion of the valve body 5 and ensures the sealing effect on the outer side of the valve body 5 after installation. It should be noted that the fourth through hole 61 inside the pin 6 is also provided with an internal thread. This internal thread is used to separate the pin 6 and the valve body 5 during the trial installation of the pin 6; once the pin 6 is fully installed in the valve body 5, it is difficult to pull it out through the internal thread.

[0025] It should be noted that the miniature overflow valve in this example has a total length of 24.5mm, an outer diameter of 5mm, and a weight of 3g after assembly. Its overall size is very small, making it suitable for some special equipment.

[0026] During implementation, the assembly structure of throttling element 1, valve core 2, spring 3, spring seat 4, valve body 5, and pin 6 simplifies the overall structure, achieving miniaturization while meeting pressure relief requirements, thus adapting to the needs of special equipment. The pin 6 allows the valve body 5 to expand and support itself after installation, achieving a sealing engagement with the outer contact surface. The annular groove 51 on the outer side of the valve body 5 facilitates expansion and ensures a good sealing effect on the outer side after installation.

[0027] The above description is merely a specific example of this utility model and does not constitute any limitation on this utility model. Obviously, those skilled in the art, after understanding the content and principle of this utility model, may make various modifications and changes in form and details without departing from the principle and structure of this utility model. However, these modifications and changes based on the concept of this utility model are still within the protection scope of the claims of this utility model.

Claims

1. A micro relief valve characterized by, It includes a filter (7), a throttle member (1), a valve core (2), a spring (3), a spring seat (4), and a valve body (5); wherein the throttle member (1) is located inside the tubular valve body (5), and the edge on one side of the throttle is abutted against the stepped surface inside the valve body (5); a spring seat (4) is also fixedly arranged inside the valve body (5), and the spring (3) and the valve core (2) are located between the spring seat (4) and the throttle member (1); the spring (3) presses the valve core (2) towards the throttle member (1); the filter (7) is located on the side of the throttle member (1) away from the valve core (2), and the end of the filter (7) abuts against the throttle member (1); a first through hole (41) for liquid flow is provided on the spring seat (4); a second through hole (11) for liquid flow is provided on the throttle member (1), a top bead (23) corresponding to the second through hole (11) is provided at the end of the valve core (2), and the top bead (23) protrudes from the end face of the valve core (2); a third through hole for liquid flow is provided on the valve core (2).

2. A micro relief valve according to claim 1, characterized in that The top bead (23) on the valve core (2) is separately arranged from the valve core (2); a concave hole corresponding to the spherical top bead (23) is provided at the end of the valve core (2).

3. A micro relief valve according to claim 2, characterized in that The top bead (23) is located on the axis of the valve core (2); the second through hole (11) on the throttle member (1) is also located on its axis.

4. A micro relief valve according to claim 2, wherein A spherical concave hole is provided at one end of the second through hole (11) on the throttle member (1) close to the top bead (23).

5. A micro relief valve according to claim 3, wherein The third through hole on the valve core (2) includes a main passage (21) and at least one sub-passage (22); the main passage (21) and the sub-passage (22) are connected; the main passage (21) extends from one end of the valve core (2) close to the spring (3) to the other side by a set depth; one end of the sub-passage (22) is located around the concave hole on the valve core (2) corresponding to the top bead (23), and the other end is connected to the main passage (21).

6. A micro relief valve according to claim 5, characterized in that Four sub-passages (22) are provided on the valve core (2), and these sub-passages (22) are arranged at equal angles with respect to the axis of the valve core (2).

7. A micro relief valve according to any one of claims 2 to 6, characterized in that The end face of the valve core (2) corresponding to the top bead (23) is set as a conical surface.

8. A micro relief valve according to claim 1, wherein The spring seat (4) and the valve body (5) are in threaded fit, and a "one" - shaped notch (42) is provided on the end face of the spring seat (4) far from the spring (3).

9. A micro relief valve according to claim 1, wherein It further includes a pin (6), the pin (6) is embedded inside the valve body (5), and is located on the side of the spring seat (4) far from the spring (3); an interference fit is adopted between the pin (6) and the valve body (5) to make the outside of the valve body (5) expand outwards; a fourth through hole for liquid flow is provided at the axis part of the pin (6).

10. A micro relief valve according to claim 9, characterized in that A number of annular grooves (51) are also provided on the outside of the valve body (5) corresponding to the area of the pin (6).

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