CN216895947U

CN216895947U - One-way valve

Info

Publication number: CN216895947U
Application number: CN202123414781.3U
Authority: CN
Inventors: 李回城; 包华斌; 陈明月; 王新宇; 孙玉梅; 李成杰
Original assignee: Shanghai Zhaomin Power Technology Co ltd
Current assignee: Shanghai Zhaomin Power Technology Co ltd
Priority date: 2021-12-31
Filing date: 2021-12-31
Publication date: 2022-07-05
Anticipated expiration: 2031-12-31

Abstract

The utility model relates to the technical field of vacuum pumps, in particular to a one-way valve for a vacuum pump. The utility model provides a one-way valve, which aims to solve the problem that a valve core of the one-way valve for the existing vacuum pump is easy to be clamped into a valve hole when in work. The valve hole of the one-way valve is provided with the supporting structure with the top flush with the cavity bottom of the valve core cavity, so that when the valve core moves, the supporting structure can be used for supporting the valve core, the valve core is prevented from being clamped into the valve hole, and further the vacuum pump failure caused by the fact that the valve core cannot be opened or closed is avoided.

Description

One-way valve

Technical Field

The utility model relates to the technical field of vacuum pumps, in particular to a one-way valve for a vacuum pump.

Background

At present, a cross-sectional structure of a check valve commonly used for a vacuum pump is shown in fig. 1, and a valve core 01 of the check valve is in a moving state during operation and is easily clamped into a valve hole 02 of the check valve, so that the sealing function of the check valve fails.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that the valve core of the check valve for the existing vacuum pump is easy to be clamped into the valve hole when in work, the inventor carefully researches and discovers that: when the one-way valve works, the valve core plays a role in opening and sealing, but in order to ensure that the vacuum pump reaches the set air extraction rate in the set time, the diameter of the valve hole of the one-way valve cannot be changed; the diameter of the valve core cannot be changed in order to avoid the interference between the valve core and the inner wall of the valve casing. Therefore, the utility model provides a check valve, which comprises a valve casing and a valve core, wherein a valve core cavity for accommodating the valve core is arranged at the upper part of the valve casing, a valve hole communicated with the valve core cavity is arranged at the lower part of the valve casing, a support structure is arranged in the valve hole, the top of the support structure is flush with the cavity bottom of the valve core cavity, and a communication hole communicated with the valve core cavity and the valve hole is arranged on the support structure. The valve hole of the one-way valve is provided with the supporting structure with the top flush with the cavity bottom of the valve core cavity, so that when the valve core moves, the supporting structure can be used for supporting the valve core, the valve core is prevented from being clamped into the valve hole, and further the vacuum pump failure caused by the fact that the valve core cannot be opened or closed is avoided.

Preferably, the support structure is formed by connecting a plurality of support rib plates. Therefore, the supporting structure formed by connecting the supporting rib plates is simple in structure, can be integrally cast and formed with the valve shell, and reduces the manufacturing cost of the one-way valve.

Preferably, the supporting rib plates are uniformly distributed. Therefore, the valve hole close to the valve core cavity can be evenly divided into a plurality of fan-column-shaped communication holes by the supporting rib plate, and the valve hole is convenient to communicate with the valve core cavity. Further, the included angle alpha between any two adjacent supporting rib plates has a value range of [30 degrees and 60 degrees ]. Therefore, the situation that the supporting structure cannot support the valve core in the moving process of the valve core due to the fact that the communicating hole in the supporting structure is too large can be avoided, and the situation that the valve hole is not communicated with the valve core cavity smoothly due to the fact that the communicating hole in the supporting structure is too small can be avoided.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art check valve;

FIG. 2 is a schematic view of the check valve of the present invention;

FIG. 3 is a schematic bottom view of the single-phase valve of FIG. 2;

fig. 4 is a schematic sectional structure view of a-a in fig. 3.

Detailed Description

The check valve of the present invention will be described in detail with reference to fig. 2 to 4.

As shown in fig. 2 to 4, the check valve of the present invention includes a valve housing 1 and a valve core 2, wherein a valve core chamber 11 for accommodating the valve core 2 is provided at an upper portion of the valve housing 1, a valve hole 12 communicated with the valve core chamber 11 is provided at a lower portion of the valve housing 1, a support structure 3 is provided in the valve hole 12, a top of the support structure 3 is flush with a chamber bottom of the valve core chamber 11, and a communication hole 31 for communicating the valve core chamber 11 and the valve hole 12 is provided on the support structure 3. The valve hole 12 of the check valve is provided with the supporting structure 3 with the top flush with the cavity bottom of the valve core cavity 11, so that when the valve core 2 moves, the supporting structure 3 can be used for supporting the valve core 2, the valve core 2 is prevented from being clamped into the valve hole 12, and further the vacuum pump failure caused by the fact that the valve core cannot be opened or closed is avoided. Preferably, the support structure 3 is formed by a plurality of support webs 32 connected together. Thus, the support structure 3 formed by connecting the support rib plates 32 has a simple structure, can be integrally cast with the valve housing 1, and reduces the manufacturing cost of the check valve. Preferably, the support webs 32 are evenly distributed. Therefore, the support rib plate 32 can equally divide the valve hole 12 close to the valve core cavity 11 into a plurality of fan-column-shaped communication holes 31, and the valve hole 12 is conveniently communicated with the valve core cavity 11. Preferably, the included angle α between any two adjacent support rib plates 32 has a value range of [30 °, 60 ° ]. Therefore, the situation that the support structure 3 cannot support the valve core 2 in the moving process of the valve core 2 due to the fact that the communication hole 31 in the support structure 3 is too large can be avoided, and the situation that the valve hole 12 is not communicated with the valve core cavity 11 smoothly due to the fact that the communication hole 31 in the support structure 3 is too small can be avoided.

Claims

1. The one-way valve is characterized by comprising a valve casing and a valve core, wherein a valve core cavity for accommodating the valve core is arranged on the upper portion of the valve casing, a valve hole communicated with the valve core cavity is formed in the lower portion of the valve casing, a supporting structure is arranged in the valve hole, the top of the supporting structure is flush with the bottom of the valve cavity of the valve core cavity, and a communication hole communicated with the valve core cavity and the valve hole is formed in the supporting structure.

2. The check valve of claim 1, wherein the support structure is formed by a plurality of support webs connected together.

3. The check valve according to claim 2, wherein the support ribs are uniformly distributed.

4. The check valve according to claim 3, wherein an included angle α between any two adjacent support webs ranges from [30 °, 60 ° ].