CN207048920U - A kind of air extractor - Google Patents
A kind of air extractor Download PDFInfo
- Publication number
- CN207048920U CN207048920U CN201720960187.9U CN201720960187U CN207048920U CN 207048920 U CN207048920 U CN 207048920U CN 201720960187 U CN201720960187 U CN 201720960187U CN 207048920 U CN207048920 U CN 207048920U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve block
- stack shell
- block seat
- stamen
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
A kind of air extractor disclosed in the utility model, connected piston and pull bar are provided with stack shell, stack shell is connected with self-closing valve stamen close to one end of piston and closed by preceding air cylinder cover, self-closing valve stamen includes valve pocket, gas flow and supporting plate are provided with valve pocket, through hole is provided with supporting plate, valve block seat is provided with valve pocket, the axle of valve block seat passes through through hole, spring is arranged with the axle of valve block seat, the one end of valve block seat away from supporting plate is placed with valve block, and preceding air cylinder cover is connected with tracheae and connects the runner that valve forms extraneous gas disengaging.A kind of air extractor of the present utility model on valve block seat due to adding spring so that valve stamen, which is not influenced by gravitation, to be closed automatically；And the special construction of the self-closing valve stamen due to a kind of air extractor of the present utility model, even if the cavity air pressure taken out is equal with external atmosphere pressure, self-closing valve stamen can also play the mutual flowing separated between stack shell and the gas for being taken out cavity, and the gas and the air in the external world for being taken out cavity would not mix.
Description
Technical field
The utility model belongs to air extractor technical field, and in particular to a kind of air extractor.
Background technology
Pump bowl has in work, life now to be widely applied very much, but current pump bowl still has
Problem：The open and close valve stamen of pump bowl typically uses sheet rubber or ball as valve block at present, in pumping process, valve block easily by
The influence of gravity, tilting or be inverted in use, seal is bad, and the gas in the cavity taken out can mix with outside air
Close, do not applied to for the place of some specific demands such as such as hospital.
Utility model content
The purpose of this utility model is to provide a kind of air extractor solve its valve block existing for existing air extractor
The problem of being easily affected by gravity its seal.
Technical scheme is used by the utility model：A kind of air extractor, including stack shell, it is provided with stack shell connected
Piston and pull bar, the one end of stack shell away from piston are closed by rear air cylinder cover, and rear air cylinder cover is provided with runner, gas after pull bar passes through
Cover stretches out, and stack shell is connected with self-closing valve stamen close to one end of piston and closed by preceding air cylinder cover, and self-closing valve stamen includes
Valve pocket, valve pocket is interior to be provided with gas flow and supporting plate, is provided with through hole in supporting plate, valve block seat, valve block seat are provided with valve pocket
Axle pass through through hole, spring is arranged with the axle of valve block seat, the both ends of spring are connected with supporting plate and valve block seat respectively, valve block seat
One end away from supporting plate is placed with valve block, and preceding air cylinder cover is connected with tracheae and connects the runner that valve forms extraneous gas disengaging.
The characteristics of the utility model, also resides in：
Sealed between valve pocket and stack shell by the second O-ring seals.
Valve pocket is sealed with preceding air cylinder cover by the first O-ring seals.
The 3rd O-ring seals are cased with piston to be in contact with the inwall of stack shell.
The beneficial effects of the utility model are：A kind of air extractor of the present utility model solves existing air extractor and deposited
Its valve block be easily affected by gravity its seal the problem of.A kind of air extractor manufacturing process of the present utility model is simple, raw
It is low to produce cost；Due to adding spring on valve block seat so that valve stamen, which is not influenced by gravitation, to be closed automatically；And due to rubber
The deformation of ball or rough surface etc. can cause air extractor sealing bad, therefore valve stamen sealing of the present utility model is better than
Rubber spherical structure；And a kind of special construction of the self-closing valve stamen of air extractor of the present utility model, even if the cavity gas taken out
When pressure is equal with external atmosphere pressure, self-closing valve stamen can also play the mutual stream separated between stack shell and the gas for being taken out cavity
Dynamic, the gas and the air in the external world for being taken out cavity would not mix, so as to pollute the gas for being taken out cavity.
Brief description of the drawings
Fig. 1 is a kind of self-closing valve stamen open mode overall structure diagram of air extractor of the present utility model；
Fig. 2 is a kind of self-closing valve stamen closure state overall structure diagram of air extractor of the present utility model；
Fig. 3 is a kind of self-closing valve stamen Structure explosion diagram of air extractor of the present utility model；
Fig. 4 is a kind of self-closing valve stamen open mode partial schematic diagram of air extractor of the present utility model；
Fig. 5 is a kind of self-closing valve stamen closure state partial schematic diagram of air extractor of the present utility model.
In figure, 1. valve blocks, 2. valve block seats, 3. springs, 4. valve pockets, 5. first O-ring seals, 6. second O-ring seals, 7.
Preceding air cylinder cover, 8. the 3rd O-ring seals, 9. pistons, 10. pull bars, 11. stack shells, air cylinder cover after 12., 13. tracheaes, 14. connect gas
Mouth, 15. handles.
Embodiment
The utility model is described in detail with reference to the accompanying drawings and detailed description.
A kind of structure of air extractor provided by the utility model as depicted in figs. 1 and 2, including stack shell 11, in stack shell 11
Connected piston 9 and pull bar 10 are provided with, the one end of stack shell 11 away from piston 9 is closed by rear air cylinder cover 12, rear air cylinder cover 12
Runner is provided with, pull bar 10 stretches out through rear air cylinder cover 12, and stack shell is connected with self-closing valve stamen close to one end of piston 9 and led to
Cross preceding air cylinder cover 7 to close, the structure of self-closing valve stamen as shown in Figure 3-Figure 5, including valve pocket 4, is provided with gas flow and branch in valve pocket 4
Fagging, through hole is provided with supporting plate, valve block seat 2 is provided with valve pocket 4, the axle of valve block seat 2 passes through through hole, the axle of valve block seat 2
On be arranged with spring 3, the both ends of spring 3 are connected with supporting plate and valve block seat 2 respectively, and one end away from supporting plate of valve block seat is placed
There is valve block 1, preceding air cylinder cover 7 is connected with tracheae 13 and connects the runner that valve 14 forms extraneous gas disengaging.Specifically, valve block seat
2 axle, which rises, is oriented to fixation, the axle installation spring 3 of valve block seat 2, the circumference uniform distribution aperture of valve pocket 4 outside axle, plays scavenging action,
When valve block 1 in opened condition, the blow vent of valve block 1 and closed preceding air cylinder cover 7 is separated, and valve block 1 is placed on valve block seat 2, valve block
Seat 2 has four boss to hold valve block 1, and its remaining gap between valve pocket 4 is beneficial to exhaust.
Further, in order to improve the sealing of whole air extractor, the 2nd O shapes are passed through between valve pocket 4 and stack shell 11
Sealing ring 6 is sealed；Sealed in valve pocket 4 with preceding air cylinder cover 11 by the first O-ring seals 5；Is cased with piston 9
Three O-ring seals 8 are in contact with the inwall of stack shell 11.
In use, settable handle 15 is affixed with pull bar 10, direction pulls to the left as shown in Fig. 1 to Fig. 5, utilizes piston
9 when vacuumizing, and the pressure that valve block 1 is located in cylinder in valve pocket 4 is less than the outer pressure of cylinder, and the stress of valve block 1 is more than the elastic force of spring 3, spring 3
Compress air cylinder cover 7 before making, tracheae 13 and connect the extraneous gas that valve 14 is formed and enter in stack shell 11, and on the left of piston 9
The gas in cavity being evacuated is then discharged out the external air of stack shell 11 along the runner on rear air cylinder cover 12 to outflow；When
Piston move right return when, valve block 1 by the compression elasticity of air pressure in stack shell and spring 3 and the closed tracheae 13 that moves right exports
Hold, the air in stack shell 11 is arranged outward, and the air of the closed stack shell 11 of valve block 1 cannot be flowed into the cavity being evacuated, i.e.,
More effectively having reached prevents gas backflow in the cavity being evacuated.
Claims (4)
1. a kind of air extractor, it is characterised in that including stack shell (11), connected piston (9) is provided with the stack shell (11)
With pull bar (10), the one end of the stack shell (11) away from piston (9) is closed by rear air cylinder cover (12), the rear air cylinder cover (12)
Runner is provided with, the pull bar (10) stretches out through the rear air cylinder cover (12), and the stack shell is close to one end of piston (9)
It is connected with self-closing valve stamen and is closed by preceding air cylinder cover (7), the self-closing valve stamen includes valve pocket (4), is provided with the valve pocket (4)
Gas flow and supporting plate, through hole is provided with the supporting plate, valve block seat (2), the valve block are provided with the valve pocket (4)
The axle of seat (2) passes through the through hole, and spring (3), the both ends difference of the spring (3) are arranged with the axle of the valve block seat (2)
It is connected with supporting plate and valve block seat (2), the described one end of valve block seat away from the supporting plate is placed with valve block (1), the preceding gas
Cover (7) is connected with tracheae (13) and connects the runner that valve (14) forms extraneous gas disengaging.
2. a kind of air extractor as claimed in claim 1, it is characterised in that pass through between the valve pocket (4) and stack shell (11)
Second O-ring seals (6) are sealed.
3. a kind of air extractor as claimed in claim 1, it is characterised in that the valve pocket (4) and preceding air cylinder cover (7) pass through the
One O-ring seals (5) are sealed.
4. a kind of air extractor as claimed in claim 1, it is characterised in that be cased with the 3rd O-ring seals on the piston (9)
(8) inwall with stack shell (11) is in contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720960187.9U CN207048920U (en) | 2017-08-02 | 2017-08-02 | A kind of air extractor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720960187.9U CN207048920U (en) | 2017-08-02 | 2017-08-02 | A kind of air extractor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207048920U true CN207048920U (en) | 2018-02-27 |
Family
ID=61499900
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720960187.9U Active CN207048920U (en) | 2017-08-02 | 2017-08-02 | A kind of air extractor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207048920U (en) |
-
2017
- 2017-08-02 CN CN201720960187.9U patent/CN207048920U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant |