CN204201190U - Vacuum control check valve - Google Patents
Vacuum control check valve Download PDFInfo
- Publication number
- CN204201190U CN204201190U CN201420518366.3U CN201420518366U CN204201190U CN 204201190 U CN204201190 U CN 204201190U CN 201420518366 U CN201420518366 U CN 201420518366U CN 204201190 U CN204201190 U CN 204201190U
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Abstract
The utility model relates to a kind of vacuum control check valve, and it belongs to vacuum valve technical field.It mainly comprises the valve body being provided with suction port and air outlet, and valve inner is provided with the valve plate of teflon and is supported the spring installed by bayonet-like structures spring support; Valve plate is arranged in valve body by guide pad, and the yield pressure of spring is equal to valve plate gravity; The section of valve plate is trapezium structure.The beneficial effects of the utility model are: ensure that valve plate open and close run more smooth, ensure that vacuum pump also can normally work in high vacuum environment, greatly improve the pumping efficiency of vacuum pump simultaneously.
Description
Technical field
The utility model relates to a kind of vacuum control check valve, and it belongs to vacuum valve technical field.
Background technique
When vacuum pump has a power failure as met by chance in the course of the work or other faults are shut down suddenly, because the pressure of vacuum system is lower than the pressure of pump discharge, so gas can backflow, destroy system vacuum.The vacuum pump vacuumized by liquid medium also can cause liquid to backflow into vacuum chamber, contaminated vacuum system.Current existing safety check has that ball seals, hard sealing, and resistance is too large under vacuum conditions, affects vacuum pump pumping efficiency, even can not open when vacuum is higher, cannot work.
Existing vacuum valve has following two kinds: a kind of do not have spring, and this shortcoming is that the gravity of valve plate itself is large, valve plate slow motion when breaking down, when pressure reduction is less, valve plate is failure to actuate, when the atmospheric pressure acting on valve plate surface is lower than valve plate gravity, valve plate drops automatically, and seal isolation lost efficacy; Another is band spring, and the spring strength of current this configuration, all much larger than the gravity of valve plate, even can not be opened when vacuum is higher, thisly can not apply under vacuum conditions.
Model utility content
The utility model, for above the deficiencies in the prior art, provides the vacuum control check valve that a kind of resistance is little, be convenient to installation.
The technological scheme that the utility model solves the problems of the technologies described above is as follows:
A kind of vacuum control check valve, comprises the valve body being provided with suction port and air outlet, and valve inner is provided with the valve plate of teflon and is supported the spring installed by spring support; Valve plate is arranged in valve body by guide pad, and the yield pressure of spring is equal to valve plate gravity; The section of valve plate is trapezium structure.
Compared with prior art, the beneficial effects of the utility model are: the yield pressure of spring just can offset valve plate gravity, thus effectively can ensure that the valve plate in high vacuum is opened closed smoothly; The section of valve plate is trapezium structure, and air flow method is even, and suffered resistance is less, thus makes valve plate open and close more smooth and easy.
On the basis of technique scheme, the utility model can also do following improvement.
Further, described spring support is bayonet-like structures.
The beneficial effect of above-mentioned further scheme is adopted to be: clamping-type spring support is stamping part preparation process, is convenient to the installation in valve body, and makes the structure in valve body simpler.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the plan view of spring support of the present utility model;
Fig. 3 is that the A-A of Fig. 2 is to sectional drawing.
In the drawings, 1, suction port; 2, valve plate; 3, valve body; 4, air outlet; 5, spring; 6, spring support; 7, guide pad.
Embodiment
Be described principle of the present utility model and feature below in conjunction with accompanying drawing, example, only for explaining the utility model, is not intended to limit scope of the present utility model.
A kind of vacuum control check valve, comprise the valve body 3 being provided with suction port 1 and air outlet 4, valve body 3 inside is provided with the valve plate 2 of teflon and is supported the spring 5 of installation by the spring support 6 of bayonet-like structures; Valve plate 2 is arranged in valve body 3 by guide pad 7, and the yield pressure of spring 5 is equal to valve plate 2 gravity; The section of valve plate 2 is trapezium structure.
The utility model operationally, because the yield pressure of spring 5 is equal to valve plate 2 gravity, makes valve plate 2 activity open and close more smooth, ensures that vacuum pump also can normally work in high vacuum environment, greatly improves the pumping efficiency of vacuum pump simultaneously.
The foregoing is only preferred embodiment of the present utility model, not in order to limit the utility model, all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection domain of the present utility model.
Claims (2)
1. a vacuum control check valve, comprise the valve body (3) being provided with suction port (1) and air outlet (4), it is characterized in that: valve body (3) inside is provided with the valve plate (2) of teflon and is supported the spring (5) installed by spring support (6); Valve plate (2) is arranged in valve body (3) by guide pad (7), and the yield pressure of spring (5) is equal to valve plate (2) gravity; The section of valve plate (2) is trapezium structure.
2. vacuum control check valve according to claim 1, is characterized in that: described spring support (6) is bayonet-like structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420518366.3U CN204201190U (en) | 2014-09-09 | 2014-09-09 | Vacuum control check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420518366.3U CN204201190U (en) | 2014-09-09 | 2014-09-09 | Vacuum control check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204201190U true CN204201190U (en) | 2015-03-11 |
Family
ID=52659153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420518366.3U Active CN204201190U (en) | 2014-09-09 | 2014-09-09 | Vacuum control check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204201190U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402437A (en) * | 2016-12-06 | 2017-02-15 | 无锡优耐特净化装备有限公司 | Butt clamp lift check valve |
| CN109869511A (en) * | 2019-03-25 | 2019-06-11 | 浙江德宏汽车电子电器股份有限公司 | A kind of vacuum pump exhaust tube structure |
| CN109869511B (en) * | 2019-03-25 | 2024-07-09 | 浙江德宏汽车电子电器股份有限公司 | Vacuum pump exhausting structure |
-
2014
- 2014-09-09 CN CN201420518366.3U patent/CN204201190U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106402437A (en) * | 2016-12-06 | 2017-02-15 | 无锡优耐特净化装备有限公司 | Butt clamp lift check valve |
| CN109869511A (en) * | 2019-03-25 | 2019-06-11 | 浙江德宏汽车电子电器股份有限公司 | A kind of vacuum pump exhaust tube structure |
| CN109869511B (en) * | 2019-03-25 | 2024-07-09 | 浙江德宏汽车电子电器股份有限公司 | Vacuum pump exhausting structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |