CN201621328U - Pneumatic valve seal device based on compound seal surface - Google Patents
Pneumatic valve seal device based on compound seal surface Download PDFInfo
- Publication number
- CN201621328U CN201621328U CN2010201407084U CN201020140708U CN201621328U CN 201621328 U CN201621328 U CN 201621328U CN 2010201407084 U CN2010201407084 U CN 2010201407084U CN 201020140708 U CN201020140708 U CN 201020140708U CN 201621328 U CN201621328 U CN 201621328U
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- valve
- compound seal
- valve seat
- seal
- spool
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Abstract
The utility model relates to a pneumatic valve, especially relates to a pneumatic valve seal device based on a compound seal surface, which comprises a valve core, a valve base, a gas discharge port, a gas outlet, a lower spring, a gas outlet and a compound seal, wherein, a valve base middle cavity and a valve core are positioned in a valve base cavity position from top to bottom, the gas discharge port is positioned at the bottom of the valve base cavity position, the gas inlet is positioned at one side of the valve base, the gas outlet is positioned at the other side of the valve base, the compound seal is of a cylinder step-shaped structure, a sealing face is arranged between a top boss and the valve base, the compound seal is positioned under the valve core, the lower spring is arranged under the compound seal. The structure can be applied into a pressure servo valve, and also can be applied into a changing-over valve. The utility model has simple structure and wide popularization and application values without the precise dimension requirement in the height direction.
Description
Technical field
The utility model relates to a kind of pneumatic valve, relates in particular to a kind of pneumatic valve seal arrangement based on compound seal face.
Background technique
The two-position three way valve is a kind of selector valve that changes the pressurized air flow direction, also is the most basic selector valve.Its fundamental function as shown in Figure 1, spool 1 moves downward, suction port 3 and air outlet 6 communicate, and continue to move downward valve seat 2 sealing surfaces, air outlet 6 and relief opening 4 sealings, on the contrary spool 1 moves upward.
At present, widely used valve all is to adopt structural type shown in Figure 1, and difference is at plane sealing and circumferential sealing, the just alleged usually poppet valve and the difference of sliding valve structure.Along with the extensive application of the expansion of valve applications, particularly pressure servo valve, the such spool design of Fig. 1 is difficult to satisfy usage requirement.There is internal leakage in the valve of Fig. 1 structure in commutation process, just have 3 full communicating phenomenons of path in commutation process.For the pressure servo valve of precision, if adopt the shortcoming that structure meet imminent earthquake swings, overshoot is excessive of Fig. 1.
In this case, the structure of Fig. 2 is pushed out, becomes the main flow spool seal form of pressure servo valve gradually.Adopt 2 sealing surfaces that motion is separated from each other in this structure.When spool 1 moves downward, under suction port 3 and the situation that air outlet 6 is communicated with, exhaust sealing 8 does not move, and seals relief opening 4 all the time under upper spring 9 effects; Move on spool 1, air inlet sealing 7 is at lower spring 5 effect lower seal suction ports 3, and when suction port 3 was sealed, exhaust sealing 8 was opened, and air outlet 6 is communicated with relief opening 4.This design can realize the high-speed transitions of air intake-exhaust, gets rid of the phenomenon of internal leakage.But this design is quite high to the processing request of servovalve, and particularly the size requirement between the relative spool height of upper-lower seal face is very accurate, and the part of motion is also more relatively.
Summary of the invention
The purpose of this utility model is to provide a kind of pneumatic valve seal arrangement based on compound seal face.
A kind of pneumatic valve seal arrangement based on compound seal face that the utility model proposes, its structure as shown in Figure 3.Form by spool 1, valve seat 2, suction port 3, relief opening 4, lower spring 5, air outlet 6 and compound seal 10, wherein: cavities in the valve seat 2, spool 1 is positioned at valve seat 2 re-entrant portions from top to bottom, relief opening 4 is positioned at the bottom of valve seat 2 re-entrant portions, suction port 3 is positioned at valve seat 2 one sides, air outlet 6 is positioned at valve seat 2 opposite sides, described compound seal 10 is the cylinder step-like structure, be provided with sealing surface between top boss and the valve seat 2, compound seal 10 is positioned at spool 1 below, and compound seal 10 belows are provided with lower spring 5.
This structure can be applied in the pressure servo valve, also can be applied in the selector valve.This structure has reduced numerous parts with respect to Fig. 2, does not also have the very accurate size requirement of short transverse, has wide application value.
Description of drawings
Fig. 1 is existing a kind of valve sealing structure.
Fig. 2 is existing alternative valve sealing configuration.
Fig. 3 is a structural diagrams of the present utility model.
Number in the figure: 1 is spool, and 2 is valve seat, and 3 is suction port, and 4 is relief opening, and 5 is lower spring, and 6 is the air outlet, and 7 are the air inlet sealing, and 8 is exhaust sealing, and 9 is upper spring, and 10 are compound seal.
Embodiment
Further specify the utility model in conjunction with the accompanying drawings below by embodiment.
Embodiment 1: as shown in Figure 3, by spool 1, valve seat 2, suction port 3, relief opening 4, lower spring 5, air outlet 6 and compound seal 10 are formed, valve seat 2 middle parts connect from top to bottom, spool 1 inserts in valve seat 2 re-entrant portions from top to bottom, relief opening 4 is positioned at the bottom of valve seat 2 re-entrant portions, suction port 3 is positioned at valve seat 2 one sides, air outlet 6 is positioned at valve seat 2 opposite sides, compound seal 10 is the cylinder step-like structure, be provided with sealing surface between top boss and the valve seat 2, compound seal 10 is positioned at spool 1 below, and boss is under spool 1 drives, can move down along suction port, compound seal 10 belows are provided with lower spring 5.
Working procedure of the present utility model is as follows: air inlet sealing and exhaust sealing are on same sealing surface.When spool 1 moves down, spool 1 is pushed down compound seal 10, and suction port 3 is communicated with air outlet 6; On spool 1, move, under lower spring 5 effects, valve seat 2 and compound seal 10 sealings, suction port 3 and air outlet 6 sealings, at the same time, air outlet 6 is connected with relief opening 4.
Claims (1)
1. pneumatic valve seal arrangement based on compound seal face, by spool (1), valve seat (2), suction port (3), relief opening (4), lower spring (5), air outlet (6) and compound seal (10) are formed, it is characterized in that: cavities in the valve seat (2), spool (1) is positioned at valve seat (2) re-entrant portion from top to bottom, relief opening (4) is positioned at the bottom of valve seat (2) re-entrant portion, suction port (3) is positioned at valve seat (2) one sides, air outlet (6) is positioned at valve seat (2) opposite side, described compound seal (10) is the cylinder step-like structure, top boss and valve seat are provided with sealing surface between (2), compound seal (10) is positioned at spool (1) below, and compound seal (10) below is provided with lower spring (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201407084U CN201621328U (en) | 2010-03-25 | 2010-03-25 | Pneumatic valve seal device based on compound seal surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201407084U CN201621328U (en) | 2010-03-25 | 2010-03-25 | Pneumatic valve seal device based on compound seal surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201621328U true CN201621328U (en) | 2010-11-03 |
Family
ID=43024783
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201407084U Expired - Lifetime CN201621328U (en) | 2010-03-25 | 2010-03-25 | Pneumatic valve seal device based on compound seal surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201621328U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339546A (en) * | 2021-05-27 | 2021-09-03 | 苏州艾尔泰流体控制有限公司 | Two-position three-way valve |
-
2010
- 2010-03-25 CN CN2010201407084U patent/CN201621328U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113339546A (en) * | 2021-05-27 | 2021-09-03 | 苏州艾尔泰流体控制有限公司 | Two-position three-way valve |
| CN113339546B (en) * | 2021-05-27 | 2023-02-24 | 苏州艾尔泰流体控制有限公司 | Two-position three-way valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20101103 |