Check valve

Abstract

The utility model discloses a check valve, which comprises an umbrella nail and an umbrella seat, the umbrella nail comprises a curved disc, a connecting rod is fixed at the center of the concave surface of the curved disc, and a plurality of anti-blocking raised strips are arranged on the convex surface of the curved disc and are uniformly distributed around the center of the curved disc; according to the anti-blocking umbrella nail, the elastic arm adopts a double-semicircle mode, it can be ensured that the umbrella nail is in the center when opened and returned each time, the anti-blocking protruding strips are arranged to be in a semicircle long-strip shape and evenly distributed around the center of the curved-surface disc, the umbrella nail can be prevented from being opened to block an air hole in the upper portion, the strength of the umbrella nail is enhanced, airflow guiding is achieved, and the anti-blocking effect is good. Abnormal sound caused by resonance when high-pressure gas passes through is prevented; the arc-shaped surface of the curved-surface disc and the plane of the connecting circular ring enable the matching surface of the umbrella base and the umbrella nail to be in a line-surface matching mode, the sealing performance can be greatly improved, an inverted buckling mode does not exist, and air resistance is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic comfort system technology, and in particular to a check valve. Background Technology

[0002] Currently, automotive seat comfort systems—pneumatic products—control the air circuits via solenoid valves. The air circuit module uses solenoid valves to control the inflation and deflation of each air circuit to achieve the module's operation. Among them, the supporting electromagnet relies on a check valve solution to achieve a low-cost pressure-holding function. The existing check valve consists of a pin and a base, fixed by a three-bridge method. The pin has many round granules on its surface to prevent it from blocking the air passage when it opens. The lower air pump inflates the pin, allowing air to enter the upper inflation port. When the air pump stops inflating, the negative pressure at the upper end seals the pin and the base, achieving the pressure-holding function.

[0003] However, when high-pressure gas passes through, the umbrella pins are pushed open by the airflow, causing resonance and abnormal noise; the three-bridge design may cause the umbrella pins to be out of center when returning to their original position, resulting in defects in the airtightness of the product and causing air leakage; the umbrella pins have circular inverted buckles on the outside, which will cause vortices to form on the umbrella pins in the airflow, increasing air resistance.

[0004] To address the shortcomings of existing technologies, a check valve needs to be designed. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a check valve.

[0006] A check valve includes an umbrella pin and an umbrella base. The umbrella pin includes a curved disc, and a connecting rod is fixed at the center of the concave surface of the curved disc. Several anti-clogging protrusions are provided on the convex surface of the curved disc and are evenly distributed around the center of the curved disc. The umbrella base includes a housing, and two elastic arms are fixed on the inner wall of the housing. The elastic arms are symmetrically arranged, and a connecting ring is fixed at the center of the two elastic arms. The connecting ring is sleeved on the connecting rod.

[0007] Furthermore, the connecting ring has a flat surface and an inclined surface on the side near the umbrella nail, and an arc-shaped connecting surface is provided at the connection between the connecting rod and the curved disk. The inclined surface and the arc-shaped connecting surface are adapted to each other, and the position of the connecting ring corresponds to the position of the connecting rod.

[0008] Furthermore, the anti-blocking protrusion is a semi-circular strip, the shell is frustum-shaped, and a fixed edge is provided at the end away from the curved disk, and the elastic arm is semi-circular.

[0009] Furthermore, an anti-detachment block is provided at the end of the connecting rod away from the curved disk.

[0010] Furthermore, both the elastic arm and the connecting ring are made of rubber.

[0011] Furthermore, the anti-detachment block is shaped like an inverted frustum, with the diameter of the side closest to the connecting ring being larger than the inner diameter of the connecting ring.

[0012] Beneficial effects: The elastic arm of this utility model adopts a double semi-circular design, which ensures that the umbrella nail is centered every time it opens and returns to its original position. The anti-blocking protrusion is set as a semi-circular strip and is evenly distributed around the center of the curved disk, which can prevent the umbrella nail from blocking the upper air hole when it opens, and strengthen the umbrella nail, realize airflow guidance, and prevent resonance and abnormal noise when high-pressure gas passes through. The arc surface of the curved disk and the plane of the connecting ring make the mating surface of the umbrella seat and the umbrella nail a line-plane mating method, which can greatly improve the sealing performance and eliminate the need for a reverse snap, thus reducing air resistance. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the check valve of this utility model;

[0014] Figure 2 This is a three-dimensional structural diagram of the interior of the umbrella holder after assembly with the umbrella nails of this utility model.

[0015] Figure 3 This is a schematic diagram of the structure of the umbrella holder of this utility model;

[0016] In the picture:

[0017] 1. Umbrella nail; 11. Curved disc; 12. Connecting rod; 13. Anti-blocking protrusion strip; 2. Umbrella base; 21. Shell; 22. Elastic arm; 23. Connecting ring. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please refer to Figures 1-3This embodiment proposes a check valve, including an umbrella pin 1 and an umbrella base 2. The umbrella pin 1 includes a curved disc 11, with a connecting rod 12 fixed at the center of the concave surface of the curved disc 11. Several anti-clogging protrusions 13 are provided on the convex surface of the curved disc 11 and are evenly distributed around the center of the curved disc 11. The umbrella base 2 includes a shell 21, which is frustoconical in shape. A fixed edge is provided at the end of the shell 21 away from the curved disc 11. Two elastic arms 22 are fixed to the inner wall of the shell 21 and are symmetrically arranged. A connecting ring 23 is fixed at the center of the two elastic arms 22 and is sleeved on the connecting rod 12. The elastic arms 22 and the connecting ring 23 are made of the same material. The rubber elastic arm 22 is semi-circular, and the double semi-circular design of the elastic arm 22 ensures that the umbrella nail 1 is centered every time it opens and returns. The anti-blocking protrusion 13 is a semi-circular strip. The anti-blocking protrusion 13 is set as a semi-circular strip and is evenly distributed around the center of the curved disk 11. This can prevent the umbrella nail 1 from opening and blocking the upper air hole, strengthen the umbrella nail 1, guide the airflow, and prevent resonance and abnormal noise when high-pressure gas passes through. In addition, the arc surface of the curved disk 11 and the plane of the connecting ring 23 make the mating surface of the umbrella seat 2 and the umbrella nail 1 a line-plane mating method, which can greatly improve the sealing performance and eliminate the need for reverse snapping, thus reducing air resistance.

[0020] The connecting ring 23 has a flat surface and an inclined surface on the side near the umbrella nail 1. The connection between the connecting rod 12 and the curved disk 11 has an arc-shaped connecting surface, with the inclined surface matching the arc-shaped connecting surface. The position of the connecting ring 23 corresponds to the position of the connecting rod 12. An anti-detachment block is provided at the end of the connecting rod 12 away from the curved disk 11. The connecting rod 12 passes through the connecting ring 23, causing the anti-detachment block to be engaged with the connecting ring 23. The anti-detachment block is shaped like an inverted frustum, with its diameter on the side near the connecting ring 23 larger than the inner diameter of the connecting ring 23, preventing the umbrella nail 1 from falling off.

[0021] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A check valve, characterized in that: The umbrella includes an umbrella nail (1) and an umbrella base (2). The umbrella nail (1) includes a curved disc (11). A connecting rod (12) is fixed at the center of the concave surface of the curved disc (11). Several anti-blocking protrusions (13) are provided on the convex surface of the curved disc (11) and are evenly distributed around the center of the curved disc (11). The umbrella base (2) includes a shell (21). Two elastic arms (22) are fixed on the inner wall of the shell (21) and the elastic arms (22) are symmetrically arranged. A connecting ring (23) is fixed at the center of the two elastic arms (22) and the connecting ring (23) is sleeved on the connecting rod (12).

2. The check valve according to claim 1, characterized in that: The connecting ring (23) has a flat surface and an inclined surface on the side near the umbrella nail (1). The connection between the connecting rod (12) and the curved disk (11) has an arc-shaped connecting surface. The inclined surface and the arc-shaped connecting surface are adapted to each other. The position of the connecting ring (23) corresponds to the position of the connecting rod (12).

3. The check valve according to claim 1, characterized in that: The anti-blocking protrusion (13) is a semi-circular strip, the shell (21) is a frustum, and a fixed edge is provided at the end away from the curved disk (11). The elastic arm (22) is semi-circular.

4. The check valve according to claim 1, characterized in that: An anti-detachment block is provided at the end of the connecting rod (12) away from the curved disk (11).

5. The check valve according to claim 1, characterized in that: Both the elastic arm (22) and the connecting ring (23) are made of rubber.

6. The check valve according to claim 4, characterized in that: The anti-detachment block is in the shape of an inverted frustum, and the diameter of the side closest to the connecting ring (23) is larger than the inner diameter of the connecting ring (23).

Images