CN205446828U - a one-way valve - Google Patents

Abstract

The utility model discloses a check valve, including last disk seat and lower disk seat, last disk seat install disk seat upper portion under, go up the disk seat and vacuole formation down between the disk seat, the lower part of going up the disk seat is provided with sealed cambered surface, spherical case is installed to sealed cambered surface lower part, guide post is installed on spherical case upper portion, the roof is installed at the guide post top, go up be provided with in the cavity of disk seat with roof complex stopper, install the spring on the guide post, the top of spring is fixed on the roof, the lower extreme of spring is fixed on last disk seat. The utility model discloses a check valve simple structure is novel, and through two-layer seal structure, sealing performance and backflow prevention performance are good, are worth popularizing and applying.

Description

a one-way valve

technical field

The utility model relates to a one-way valve.

Background technique

The one-way valve is that the fluid can only flow along the water inlet, but the outlet medium cannot flow back, commonly known as a one-way valve. One-way valve is also called check valve or check valve. Used in hydraulic systems to prevent reverse flow of oil flow, or used in pneumatic systems to prevent reverse flow of compressed air. There are two types of check valves, straight-through and right-angle. The straight-through check valve is installed on the pipeline with a threaded connection. There are three types of right-angle check valves: threaded connection, plate connection and flange connection. The hydraulic control check valve is also called a lock valve or a pressure maintaining valve. It is the same as a check valve and is used to prevent the reverse flow of oil. However, when the reverse flow of the oil flow is required in the hydraulic circuit, the control oil pressure can be used to open the check valve so that the oil flow can flow in both directions. The hydraulically controlled one-way valve adopts a tapered valve core, so the sealing performance is good. When it is required to close the oil circuit, this valve can be used as a one-way locking of the oil circuit to maintain pressure. There are two ways of hydraulic control check valve to control oil leakage: internal leakage type and external leakage type. The internal leakage type can be used in the oil circuit with no back pressure at the oil flow reverse outlet; otherwise, the external leakage type is required to reduce the control oil pressure.

The structure of the existing one-way valve is complex, and the sealing performance and anti-backflow performance are not ideal.

Utility model content

The purpose of the utility model is to provide a one-way valve in order to make up for the deficiencies of the prior art.

The purpose of this utility model is achieved by the following technical solutions:

A check valve, comprising an upper valve seat and a lower valve seat, characterized in that: the upper valve seat is installed on the upper part of the lower valve seat, a cavity is formed between the upper valve seat and the lower valve seat, and the lower part of the upper valve seat is arranged There is a sealing arc surface, the lower part of the sealing arc surface is installed with a spherical valve core, the upper part of the spherical valve core is installed with a guide column, the top of the guide column is installed with a top plate, and the cavity of the upper valve seat is provided with a limit block that cooperates with the top plate, and the guide column A spring is installed on the top, the top of the spring is fixed on the top plate, and the lower end of the spring is fixed on the upper valve seat.

The above-mentioned one-way valve is characterized in that: the upper valve seat and the lower valve seat are connected by threads.

The above one-way valve is characterized in that: the top plate is in the shape of a truncated cone, and the upper surface of the top plate is smaller than the lower surface.

The above-mentioned one-way valve is characterized in that: the lower end of the lower valve seat is provided with several rings of grooves.

The above one-way valve is characterized in that: sealing rings are installed between the spherical valve core and the upper valve seat and the lower valve seat.

The utility model has the advantages of:

The structure of the one-way valve of the utility model is simple and novel, and the two-layer sealing structure has good sealing performance and anti-backflow performance, and is worthy of popularization and application.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1. Upper valve seat, 2. Lower valve seat, 3. Cavity, 4. Sealing arc surface, 5. Spherical valve core, 6. Guide column, 7. Top plate, 8. Limiting block, 9. Spring , 10. Groove, 11. Sealing ring.

detailed description

Referring to the accompanying drawings, a one-way valve includes an upper valve seat 1 and a lower valve seat 2, the upper valve seat 1 is installed on the upper part of the lower valve seat 2, and a cavity 3 is formed between the upper valve seat 1 and the lower valve seat 2 , the lower part of the upper valve seat 1 is provided with a sealing arc surface 4, the lower part of the sealing arc surface 4 is equipped with a spherical valve core 5, the upper part of the spherical valve core 5 is equipped with a guide column 6, and the top of the guide column 6 is equipped with a top plate 7, and the upper valve seat 1 A limit block 8 cooperating with the top plate 7 is arranged in the cavity 3 of the valve body, a spring 9 is installed on the guide column 6, the top end of the spring 9 is fixed on the top plate 6, and the lower end of the spring 9 is fixed on the upper valve seat 1.

The upper valve seat 1 and the lower valve seat 2 are threaded.

The top plate 6 is in the shape of a truncated cone, and the upper surface of the top plate 6 is smaller than the lower surface.

The lower end of the lower valve seat 2 is provided with several rings of grooves 10 .

A sealing ring 11 is installed between the spherical valve core 5 and the upper valve seat 1 and the lower valve seat 2 .

The structure of the one-way valve of the utility model is simple and novel, and the two-layer sealing structure has good sealing performance and anti-backflow performance, and is worthy of popularization and application.

Embodiments of the present utility model have been described above in conjunction with the accompanying drawings, but the present utility model is not limited to the above-mentioned specific embodiments, and the above-mentioned specific embodiments are only illustrative, rather than restrictive, and those of ordinary skill in the art Under the enlightenment of the utility model, personnel can also make many forms without departing from the scope of protection of the purpose of the utility model and claims, and these all belong to the protection of the utility model.

Claims (5)

1. A check valve, comprising an upper valve seat and a lower valve seat, is characterized in that: the upper valve seat is installed on the upper part of the lower valve seat, a cavity is formed between the upper valve seat and the lower valve seat, and the upper valve seat The lower part is provided with a sealing arc surface, the lower part of the sealing arc surface is installed with a spherical valve core, the upper part of the spherical valve core is installed with a guide column, the top of the guide column is installed with a top plate, and the cavity of the upper valve seat is provided with a limit block that cooperates with the top plate. A spring is installed on the guide post, the top of the spring is fixed on the top plate, and the lower end of the spring is fixed on the upper valve seat. 2. A one-way valve according to claim 1, characterized in that: the upper valve seat and the lower valve seat are connected by threads. 3. A one-way valve according to claim 1, characterized in that: the top plate is in the shape of a truncated cone, and the upper surface of the top plate is smaller than the lower surface. 4. A one-way valve according to claim 1, characterized in that: the lower end of the lower valve seat is provided with several rings of grooves. 5. A one-way valve according to claim 1, characterized in that: sealing rings are installed between the spherical valve core, the upper valve seat and the lower valve seat.