CN207648206U - A kind of mechanical high sealing check valve - Google Patents
A kind of mechanical high sealing check valve Download PDFInfo
- Publication number
- CN207648206U CN207648206U CN201721518477.4U CN201721518477U CN207648206U CN 207648206 U CN207648206 U CN 207648206U CN 201721518477 U CN201721518477 U CN 201721518477U CN 207648206 U CN207648206 U CN 207648206U
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- spool
- shell
- piston
- check valve
- cavity
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Abstract
The utility model is related to a kind of mechanical high sealing check valves, including shell, spool, piston, inlet nipple and outlet nozzle, inlet nipple and outlet nozzle is respectively set in the both sides of shell, spool is slidably arranged in the inner cavity of shell, adjusting nut is arranged in the top of the shell, the top of spool connects piston, and spring is arranged between adjusting nut and piston.The utility model uses this structure, expands one-way valve inlet pressure sensitive area, to reduce unidirectional valve opening pressure, increases initial tension of spring, improves product longitudinal direction vibration resistance；Meanwhile vibration is set in moving member spool and is limited, overcome the problems, such as to cause spring force value to change because vibrating or impacting condition, effectively improves the reversed low pressure seal performance of product, can realize the index request of the zero leakage under vibration or shock environment.
Description
Technical field
The utility model is related to a kind of mechanical high sealing check valves, belong to valve type field.
Background technology
Check valve is a kind of automatic valve, and the extensive use in various pneumatic systems, function is the unidirectional of control fluid
Flowing, prevents medium from flowing backwards.It before engine start, need to ensure that the fuel oil in fuel tank can not be flow backwards into supercharging gas circuit, and work as
After engine start, check valve is opened, and is continued to fuel tank pressure supply, and hereafter, check valve is without being again switched off.Currently, due to body
Air source is limited, to increase missile air range, improves the utilization rate of air source, reduces the pressure loss, the Opening pressure of check valve compared with
Low, initial tension of spring is insufficient, therefore, should ensure that the low-pressure of check valve is opened, ensure that the sealing of reversed low-pressure is wanted again
The design difficulty of Seeking Truth check valve is an important development direction of air-channel system from now on especially in transport and vibration processes,
Have a vast market foreground.
Invention content
The utility model for the above-mentioned prior art the problem of, a kind of mechanical high sealing check valve is provided, will
One-way valve designs realize that low-pressure can be opened at mechanical disposable products, and reversely have the guarantee of taller springs pretightning force
It is sealed.
The technical solution of the utility model is as follows：
A kind of mechanical high sealing check valve, including shell, spool, piston, inlet nipple and outlet nozzle, the two of shell
Inlet nipple and outlet nozzle is respectively set in side, and spool is slidably arranged in the inner cavity of shell, and the top setting of the shell is adjusted
The top of whole nut, spool connects piston, and spring is arranged between adjusting nut and piston.
Sealing rubber ring I is equipped between the piston and shell.
Sealing rubber ring II is set between the spool and shell.
The housing cavity is laterally-graded formula cavity, and staged cavity includes the first cavity and the second cavity, spool
It is fitted closely with the first cavity, piston is fitted closely with the second cavity.
The advantageous effect of the utility model compared with prior art：
Utility model Opening pressure is not more than 0.02MPa, reversed zero leakage.
Using this structure, expand one-way valve inlet pressure sensitive area, to reduce unidirectional valve opening pressure, it is pre- to increase spring
Clamp force improves product longitudinal direction vibration resistance；Meanwhile vibration is set in moving member spool and is limited, overcome because vibrating or impacting condition
It causes spring force value to change problem, effectively improves the reversed low pressure seal performance of product, can realize in vibration or impact ring
The index request of zero leakage under border.In addition, the utility model Opening pressure is low, leakproofness is high, reliable operation, is vibrating and is impacting
Condition can guarantee the leakproofness of product.
Description of the drawings
FIG. 1 is a schematic structural view of the utility model.
In figure, 1- shells, 2- cushion rubbers I, 3- adjusting nut, 4- springs, 5- pistons, 6- cushion rubbers II, 7- outlet nozzle, 8-
Spool.
Specific implementation mode
Referring to the drawings, in conjunction with specific embodiments, the utility model is described in detail.
As shown, a kind of mechanical high sealing check valve, including shell 1, spool 8, inlet nipple and outlet nozzle 7,
Inlet nipple and outlet nozzle is respectively set in the both sides of shell 1, and spool 8 is slidably arranged in the inner cavity of shell, the shell
Adjusting nut 3 is arranged in top, and the top of spool connects piston 5, spring 4 is arranged between adjusting nut and piston.
Sealing rubber ring I is equipped between the piston and shell；Sealing rubber ring II is set between the spool and shell.
The housing cavity is laterally-graded formula cavity, and staged cavity includes the first cavity and the second cavity, spool
It is fitted closely with the first cavity, piston is fitted closely with the second cavity.
In given inlet pressure P1, by adjusting adjusting nut 3, keep spring 4 compressed, spring-force driven dual is in piston 5
On, then in entrance given pressure P1, inlet pressure will produce upward active force to offset spring pre-tightening at piston at this time
Power, when more than buffer brake and preload force effect, piston upwards are moved right in inlet pressure effect bottom spool 8, when
When one-way valved outlet has fluid generation, as check valve is opened, and inlet pressure is the Opening pressure of check valve at this time, in conjunction with head
The Opening pressure of secondary debugging carries out accurate adjustment according to index request to check valve, to meet Opening pressure requirement.When system does not work
Or when import no pressure, under the action of initial tension of spring, spool 8 can be fitted closely with shell, and sealing rubber ring I and fluid sealant
Circle II will produce deformation, by the deformation of sealing rubber ring I and sealing rubber ring II, reach the reversed sealing function of check valve, hinder
The reverse flow of system fluid under transport, vibration environment, it is ensured that stable state when system works.
The above is specific embodiment of the utility model and the technical principle used, any to be based on the utility model
Equivalent transformation on the basis of technical solution, belongs within the scope of protection of the utility model.
The utility model unspecified part is known to the skilled person technology.
Claims (4)
1. a kind of mechanical high sealing check valve, it is characterised in that including shell, spool, piston, inlet nipple and outlet nozzle,
Inlet nipple and outlet nozzle is respectively set in the both sides of shell, and spool is slidably arranged in the inner cavity of shell, the top of the shell
End setting adjusting nut, the top of spool connect piston, spring are arranged between adjusting nut and piston.
2. a kind of mechanical high sealing check valve according to claim 1, it is characterised in that the piston and shell it
Between be equipped with sealing rubber ring I.
3. a kind of mechanical high sealing check valve according to claim 1, it is characterised in that the spool and shell it
Between setting sealing rubber ring II.
4. a kind of mechanical high sealing check valve according to claim 1, it is characterised in that the housing cavity is cross
To staged cavity, staged cavity includes the first cavity and the second cavity, and spool is fitted closely with the first cavity, piston and the
Two cavitys fit closely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721518477.4U CN207648206U (en) | 2017-11-15 | 2017-11-15 | A kind of mechanical high sealing check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721518477.4U CN207648206U (en) | 2017-11-15 | 2017-11-15 | A kind of mechanical high sealing check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207648206U true CN207648206U (en) | 2018-07-24 |
Family
ID=62889703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721518477.4U Active CN207648206U (en) | 2017-11-15 | 2017-11-15 | A kind of mechanical high sealing check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207648206U (en) |
-
2017
- 2017-11-15 CN CN201721518477.4U patent/CN207648206U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |