CN104776262B - Automatic exhaust valve - Google Patents
Automatic exhaust valve Download PDFInfo
- Publication number
- CN104776262B CN104776262B CN201510231681.7A CN201510231681A CN104776262B CN 104776262 B CN104776262 B CN 104776262B CN 201510231681 A CN201510231681 A CN 201510231681A CN 104776262 B CN104776262 B CN 104776262B
- Authority
- CN
- China
- Prior art keywords
- valve
- guide post
- valve element
- bonnet
- float
- 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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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
- F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
- F16K1/38—Valve members of conical shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K33/00—Floats for actuation of valves or other apparatus
Abstract
The invention discloses an automatic exhaust valve. The automatic exhaust valve comprises an upper valve deck, a guide rod, a valve element, a floater and a valve body formed by connecting a support and a lower valve deck. A lower guide rod via hole is formed in the center of the lower valve deck. The support is provided with gas-liquid inlets. An upper guide rod via hole and exhaust ports are formed in the center of the upper portion of the upper valve deck, and a main exhaust hole is formed in the center of the lower portion of the upper valve deck. The valve element is of a circular cone frustum structure, the conical surface of the valve element can be matched with the main exhaust hole to form a main sealing surface. The center of the valve element is provided with an auxiliary exhaust hole with the aperture larger than the diameter of the guide rod. The guide rod penetrates through the upper guide rod via hole, the main exhaust hole, the auxiliary exhaust hole and the lower guide rod via hole. A conical boss is arranged in the middle of the guide rod. The valve element is located above the conical boss. The conical surface of the conical box can be matched with the auxiliary exhaust hole to form an auxiliary sealing surface. The floater is located below the conical boss and bonded to the guide rod in a penetrated and sleeving mode. The automatic exhaust valve can increase the exhaust rate, the valve element and the floater can conduct guiding reliably, and the phenomenon that the valve element and the floater get stuck is avoided.
Description
Technical field
The present invention relates to a kind of automatic exhaust steam valve.
Background technology
In the industrial and civilian occasion of many, realize gas-liquid separation or in order to arrange to exclude the gas in container or pipeline
Liquid in clean pipeline and air inlet, automatic exhaust steam valve is adopted in a large number.But some automatic exhaust steam valves at present, though can realize just
Phase high-flow air-exhaust and later stage primary exhaust flow function, but valve mechanism is complicated, bulky；Some automatic exhaust steam valves adopt valve
Core, float integral structure, it can only realize initial stage aerofluxuss, once initial stage aerofluxuss terminate, tank is interior or manifold pressure rises to
After certain value, due in tank or manifold pressure effect, make power upwards suffered by valve element be more than the gravity of valve element and float, when
Reassemble in tank or in pipeline after gas, valve will not move down and reopen, lead to degassing function to be lost.
Cn202158201u discloses a kind of buffering exhaust valve, and it includes valve body and the valve gap being placed in above valve body, valve body
Bottom is provided with air inlet, and valve gap is provided with main vent, is provided with ball float in valve pocket, is provided with and can pass through in valve pocket above ball float
Lifting turns off or on the buffering flap of main vent, and buffering flap has upper and lower two end faces, and upper surface is provided with and main row
The sealing surface of QI KOU cooperation, has the gap that supply stream passes through, buffering flap has between buffering flap side wall and valve interior wall
Link up the second exhaust port that upper and lower end face and ball float can be closed when floating.It enables initial stage high-flow air-exhaust and later stage
Primary exhaust flow.But still suffer from following problem: (1) ball float can be subject to head-on blowing of the air-flow entering from air inlet, as long as
Air velocity reaches certain value, and buffering flap may turn off, and ball float also can close second exhaust port, may also have a large amount of gases not
Discharge, exhaust effect is bad, and does not enable Quick air-discharge；(2) buffering flap relies on guide post guiding, leading on buffering flap
Only has single point supporting to bar and fairlead, guide effect difference is in fact it could happen that clamping stagnation；Ball float relies on the guiding rib of valve interior wall to lead
To difficulty of processing is big；(3) the top floating ball float surface of second exhaust port forms sealing surface, and ball float processing request is high, otherwise easily
Cause to seal (closing) not tight problem.
Content of the invention
It is an object of the invention to provide a kind of simple automatic exhaust steam valve of structure, with realize initial stage high-flow air-exhaust and after
Under conditions of phase primary exhaust flow, accelerate deflation rate, make valve element and floater guiding reliable, it is to avoid catching phenomenon occurs simultaneously.
Automatic exhaust steam valve of the present invention, including bonnet, guide post, valve element, float and by support and bottom flange
The valve body connecting and composing, described bonnet, is arranged on above valve body, and described valve element and float are located in the valve pocket that valve body is formed.Institute
The center stating bottom flange offers lower guide post via, and described support is provided with gas-liquid import.The central upper portion of described bonnet,
Offer guide post via, the top of bonnet, offers the air vent around upper guide post via, under bonnet,
Portion center offers the main exhaust hole that can connect air vent with valve pocket.Described valve element is circular cone structure, and its conical surface can be with master
Steam vent cooperatively forms primary sealing area, and the center of valve element offers the auxiliary exhaust ports that aperture is more than the diameter of described guide post,
Air vent can be connected by this auxiliary exhaust ports with valve pocket.Described guide post passes through upper guide post via, main exhaust hole, auxiliary exhaust
Hole and lower guide post via and one end is stretched out outside bonnet, the other end stretches out outside bottom flange, guide post and auxiliary exhaust ports
Between formed gap constitute auxiliary exhaust passages；The middle part of described guide post has conical boss, and valve element is located at conical boss
Top, and the conical surface of this conical boss can cooperatively form auxiliary seal face with described auxiliary exhaust ports, float is located at conical boss
Lower section and wear and bonding on the guide bar, float can drive guide post to move up and down relative to bonnet, valve element and bottom flange.
Described support is arranged to make up by the many columns being circumferentially evenly arranged, and described gas-liquid import is adjacent two root posts
Between formed interval.
Described support is alternatively cylinder, and described gas-liquid import is the via being opened on this cylinder wall.
Described valve element is made up of with the rubber sleeve being coated on outside steel core steel core；Valve element directly can also be added by politef
Work forms.
Described float is hollow ball structure or solid cylinder structure.
Described bottom flange is circular flat board or square plate, and offers the bottom flange peace being connected with described support thereon
Dress hole.
Described air vent is three equally distributed fan looping pits along around described guide post via；Edge on described bonnet,
Even circumferential offers six bonnet, installing holes.Bonnet, can be used as mounting flange and pipeline or the liquid storage of automatic exhaust steam valve
Tank is connected.
Its operation principle is as follows:
When not having liquid in pipeline (or fluid reservoir), float and valve element are in bottom, the conical boss of guide post
The auxiliary exhaust ports of the conical surface and valve element cooperatively form auxiliary seal face, float is supported on bottom flange, gas-liquid import, valve pocket,
Main exhaust hole, air vent connection, carry out initial stage high-flow air-exhaust；With the carrying out of aerofluxuss, liquid enters from gas-liquid import, works as gas
When body will be drained, liquid level makes float floating band movable valve plug and guide post move upwards, the wall in the conical surface of valve element and main exhaust hole
Face cooperatively forms primary sealing area, closes main exhaust hole, stops high-flow air-exhaust.After main exhaust bore closure, with liquid (or gas
Liquid mixture) go successively to, the interior pressure of pipeline (or fluid reservoir) rises, and due to differential pressure action, continues to closed mode；When
When bubble coalescence in pipeline (or fluid reservoir) and so that the interior liquid level of pipeline (or fluid reservoir) is declined, float and guide post can be with
Move down with liquid level, and valve element because differential pressure action (i.e. gas act on the pressure of valve element be more than the gravity of valve element) still maintain original with
The state of the wall fitted seal in main exhaust hole, guide post moves down makes the conical surface disengaging of its conical boss and joining of auxiliary exhaust ports
Close, gas-liquid import, valve pocket, auxiliary exhaust ports, air vent connection, start primary exhaust flow.This process can with pipeline (or
Fluid reservoir) accumulation of interior gas, exclusion and constantly repeat, to ensure no more air volume in pipeline (or fluid reservoir)
Deposit.Need manually opened when carrying out primary exhaust flow, be pressed downward the part outside guide post is located at bonnet,.
When the air pressure in pipeline (or fluid reservoir) is less than ambient pressure, valve element moves down and automatically turns on main exhaust hole and enter
Gas.
The present invention compared with prior art, has the effect that
(1) the gas-liquid import of valve pocket is located on support, and float and valve element are intercepted by bottom flange, will not be blown by air-flow,
Only gas will drain, and liquid makes float, guide post and valve element just close aerofluxuss when rising, and will not produce misoperation, aerofluxuss
Effect is good, and enables Quick air-discharge.
(2) valve element and float are all guided by guide post, and guide post passes through bonnet, and bottom flange, is two dot point, leads
To reliability, it is difficult clamping stagnation, and guide post structure is simple, handling ease.
(3) conical surface of the conical boss in the middle part of guide post and auxiliary exhaust ports cooperatively form auxiliary seal face, and processing is held
Easily, and good sealing effect.
(4) by the part outside pushing guide post and being located at bonnet, it is achieved that the function of manually opened primary exhaust flow.
Brief description
Fig. 1 is the structural representation of the automatic exhaust steam valve of embodiment 1.
Fig. 2 is the structural representation of the bonnet, of embodiment 1.
Fig. 3 is the upward view of the support of embodiment 1.
Fig. 4 is the structural representation of the bottom flange of embodiment 1.
Fig. 5 is the structural representation that in embodiment 1, automatic exhaust steam valve is closed.
Fig. 6 is the schematic diagram that in embodiment 1, automatic exhaust steam valve carries out primary exhaust flow.
Fig. 7 is that the automatic exhaust steam valve of embodiment 1 is arranged on the view on pipeline.
Fig. 8 is the structural representation of the valve element of embodiment 2.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is elaborated.
Embodiment 1: automatic exhaust steam valve as shown in Figures 1 to 7, including bonnet, 1, guide post 2, valve element 3, float 5 with
And the valve body being connected and composed by support 4 and bottom flange 6, bonnet, 1 is welded on above valve body, and valve element 3 and float 5 are located at valve body shape
In the valve pocket 7 becoming, float 5 is solid cylinder structure (can also be hollow ball structure).
Support 4 is cylinder, this cylinder wall offers via 41 as the gas-liquid import of valve body, the lower surface of this cylinder
Offer four connecting screw holes 42.
Bottom flange 6 is circular flat board, and the center of bottom flange 6 offers lower guide post via 61, and surrounding uniformly offers four
The individual bottom flange installing hole 62 coordinating and being connected by screw with support 4 four connecting screw holes 42.
The central upper portion of bonnet, 1 offers guide post via 11, and the top of bonnet, 1 offers three along guide post
Around via 11, as air vent 12, the lower central of bonnet, 1 offers can be by air vent 12 for equally distributed fan looping pit
The main exhaust hole 13 being connected with valve pocket 7, bonnet, 1 is circumferentially uniformly offered six bonnet,s being connected with pipeline 8 and installs
Hole 14.
Valve element 3 is circular cone structure, and valve element 3 is directly processed by politef.The conical surface energy of valve element 3 and main exhaust
Hole 13 cooperatively forms primary sealing area, and the center of valve element 3 offers the auxiliary exhaust ports 31 that aperture is more than the diameter of guide post 2, should
Air vent 12 can be connected by auxiliary exhaust ports with valve pocket 7.
Guide post 2 passes through upper guide post via 11, main exhaust hole 13, auxiliary exhaust ports 31 and lower guide post via 61 and
End is stretched out outside bonnet, 1, and the other end stretches out outside bottom flange 6, the gap structure being formed between guide post 2 and auxiliary exhaust ports 31
Become auxiliary exhaust passages；The middle part of guide post 2 has conical boss 21, and valve element 3 is located above conical boss 21, and this circular cone is convex
The conical surface of platform 21 can cooperatively form auxiliary seal face with auxiliary exhaust ports 31, and float 5 is located at conical boss 21 lower section and wears simultaneously
It is bonded on guide post 2, float 5 can drive guide post 2 bonnet, 1, valve element 3 and bottom flange 6 relatively to move up and down.
Using bolt by 81 points of six pipeline connecting holes on the six bonnet, installing holes 14 on bonnet, 1 and pipeline 8
Dui Ying not connect, thus realizing installation on pipeline 8 for the above-mentioned automatic exhaust steam valve.
Its operation principle is as follows: when not having liquid in pipeline 8, float 5 and valve element 3 are in bottom, the circle of guide post 2
The conical surface of cone boss 21 and the auxiliary exhaust ports 31 of valve element 3 cooperatively form auxiliary seal face, and float 5 is supported on bottom flange 6, gas
Liquid import (i.e. via 41), valve pocket 7, main exhaust hole 13, air vent 12 connect, and carry out initial stage high-flow air-exhaust；With aerofluxuss
Carry out, liquid from gas-liquid import enter, when gas will be drained, liquid level make float 5 float band movable valve plug 3 and guide post 2 to
Upper motion, the conical surface of valve element 3 cooperatively forms primary sealing area with the wall in main exhaust hole 13, closes main exhaust hole 13, stops big stream
Amount aerofluxuss.After main exhaust hole 13 is closed, go successively to liquid (or gas-liquid mixture), in pipeline 8, pressure rises, due to
Differential pressure action, continues to closed mode；When bubble coalescence occurring in pipeline 8 making in pipeline liquid level decline, float 5 and guiding
Bar 2 can be followed liquid level and be moved down, and valve element 3 is still tieed up because of differential pressure action (i.e. gas acts on the gravity more than valve element for the pressure of valve element)
Hold the state of the original wall fitted seal with main exhaust hole 13, guide post 2 move down the conical boss 21 making the conical surface depart from and
The cooperation of auxiliary exhaust ports 31, gas-liquid import (i.e. via 41), valve pocket 7, auxiliary exhaust ports 31, air vent 12 connect, and start little
Flow aerofluxuss.This process can with the accumulation of gas in pipelines, exclusion and constantly repeat, no more to ensure in pipeline
Gas accumulation.Need manually opened when carrying out primary exhaust flow, be pressed downward the part outside guide post 2 is located at bonnet, 1.
When the air pressure in pipeline is less than ambient pressure, valve element 3 moves down and automatically turns on main exhaust hole 13 air inlet.
Embodiment 2: the structure of its automatic exhaust steam valve is identical with the structure major part of automatic exhaust steam valve in embodiment 1 is different
Part is: valve element 3 constitutes (referring to Fig. 8) by steel core 32 with the rubber sleeve 33 being coated on outside steel core 32；Support 4 is by four along circle
The column being evenly arranged in week is arranged to make up, and gas-liquid import is the interval being formed between adjacent two root posts；Bottom flange 6 is square flat
Plate.The operation principle of its automatic exhaust steam valve is identical with the operation principle of automatic exhaust steam valve in embodiment 1.
Claims (7)
1. a kind of automatic exhaust steam valve, including bonnet, (1), guide post (2), valve element (3), float (5) and by support (4) and under
The valve body that valve gap (6) connects and composes, described bonnet, (1) is arranged on above valve body, and described valve element (3) and float (5) are located at valve
In the valve pocket (7) that body is formed；It is characterized in that:
The center of described bottom flange (6) offers lower guide post via (61), and described support (4) is provided with gas-liquid import；
The central upper portion of described bonnet, (1) offers guide post via (11), and the top of bonnet, offers to be located at and above leads
To the air vent (12) around bar via, the lower central of bonnet, is offered and can be connected air vent (12) with valve pocket (7)
Main exhaust hole (13)；
Described valve element (3) is circular cone structure, and its conical surface can cooperatively form primary sealing area, the center of valve element with main exhaust hole (13)
Offer the auxiliary exhaust ports (31) that aperture is more than the diameter of described guide post (2), this auxiliary exhaust ports can be by air vent (12)
Connect with valve pocket (7)；
Described guide post (2) passes through upper guide post via (11), main exhaust hole (13), auxiliary exhaust ports (31) and lower guide post mistake
Hole (61) and one end is stretched out outside bonnet, (1), the other end stretches out outside bottom flange (6)；The middle part of described guide post (2) has
Conical boss (21), valve element (3) is located above conical boss (21), and the conical surface of this conical boss can be with described auxiliary exhaust ports
(31) cooperatively form auxiliary seal face, float (5) is located at below conical boss (21) and wears and be bonded on guide post (2),
Float (5) can drive guide post (2) bonnet, (1), valve element (3) and bottom flange (6) relatively to move up and down.
2. automatic exhaust steam valve according to claim 1 it is characterised in that: described support (4) is by many circumferentially uniform cloth
The column put is arranged to make up, and described gas-liquid import is the interval being formed between adjacent two root posts.
3. automatic exhaust steam valve according to claim 1 it is characterised in that: described support (4) be cylinder, described gas-liquid import
For the via (41) being opened on this cylinder wall.
4. automatic exhaust steam valve according to claim 1 it is characterised in that: described valve element (3) by steel core (32) and is coated on
Rubber sleeve (33) outside steel core is constituted.
5. the automatic exhaust steam valve according to claim 1 or 2 or 3 or 4 it is characterised in that: described float (5) be hollow ball
Structure or solid cylinder structure.
6. automatic exhaust steam valve according to claim 5 it is characterised in that: described bottom flange (6) is circular flat board or side
Shape flat board, and offer the bottom flange installing hole (62) being connected with described support (4) thereon.
7. automatic exhaust steam valve according to claim 6 it is characterised in that: described air vent (12) be three along described guiding
Equally distributed fan looping pit around bar via (11)；Six bonnet, peaces are circumferentially uniformly offered on described bonnet, (1)
Dress hole (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231681.7A CN104776262B (en) | 2015-05-08 | 2015-05-08 | Automatic exhaust valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510231681.7A CN104776262B (en) | 2015-05-08 | 2015-05-08 | Automatic exhaust valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104776262A CN104776262A (en) | 2015-07-15 |
| CN104776262B true CN104776262B (en) | 2017-02-01 |
Family
ID=53617906
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510231681.7A Active CN104776262B (en) | 2015-05-08 | 2015-05-08 | Automatic exhaust valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104776262B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105114656A (en) * | 2015-08-17 | 2015-12-02 | 平原机器厂（新乡） | Exhaust valve and piston thereof |
| CN106051287B (en) * | 2016-05-27 | 2018-02-06 | 中国工程物理研究院化工材料研究所 | A kind of isostatic pressing machine Work container upper end cover float-type air inlet-and-exhaust device |
| CN107869606A (en) * | 2017-12-05 | 2018-04-03 | 博纳斯威阀门股份有限公司 | A kind of micro-exhaust valve for carrying filtering function |
| CN108561617A (en) * | 2018-05-23 | 2018-09-21 | 青岛双瑞海洋环境工程股份有限公司 | The float-type steam-water separation valve for the failure phenomenon that builds the pressure can be overcome |
| CN110043672B (en) * | 2019-04-16 | 2020-12-08 | 海洋石油工程股份有限公司 | Hand-pulling type air release valve |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209032A (en) * | 1978-05-22 | 1980-06-24 | Mordeki Drori | Air-relief valves |
| CN87210480U (en) * | 1987-08-24 | 1988-05-25 | 缪平溪 | Composite exhausting valve with double outlet |
| US5595210A (en) * | 1993-09-30 | 1997-01-21 | Smc Corporation | Auto-drain unit |
| JP2001132862A (en) * | 1999-11-08 | 2001-05-18 | Asahi Organic Chem Ind Co Ltd | Air valve |
| CN2806908Y (en) * | 2005-07-19 | 2006-08-16 | 刘阳 | Core of quick exhaust valve |
| CN2809354Y (en) * | 2005-01-17 | 2006-08-23 | 贺传政 | Automatic exhaust valve with variable submerged weight and double gas passages |
| CN202158201U (en) * | 2011-07-22 | 2012-03-07 | 安徽铜都阀门股份有限公司 | Buffering exhaust valve |
| CN204692721U (en) * | 2015-05-08 | 2015-10-07 | 中国人民解放军后勤工程学院 | Embedded automatic control pressure vent |
-
2015
- 2015-05-08 CN CN201510231681.7A patent/CN104776262B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4209032A (en) * | 1978-05-22 | 1980-06-24 | Mordeki Drori | Air-relief valves |
| CN87210480U (en) * | 1987-08-24 | 1988-05-25 | 缪平溪 | Composite exhausting valve with double outlet |
| US5595210A (en) * | 1993-09-30 | 1997-01-21 | Smc Corporation | Auto-drain unit |
| JP2001132862A (en) * | 1999-11-08 | 2001-05-18 | Asahi Organic Chem Ind Co Ltd | Air valve |
| CN2809354Y (en) * | 2005-01-17 | 2006-08-23 | 贺传政 | Automatic exhaust valve with variable submerged weight and double gas passages |
| CN2806908Y (en) * | 2005-07-19 | 2006-08-16 | 刘阳 | Core of quick exhaust valve |
| CN202158201U (en) * | 2011-07-22 | 2012-03-07 | 安徽铜都阀门股份有限公司 | Buffering exhaust valve |
| CN204692721U (en) * | 2015-05-08 | 2015-10-07 | 中国人民解放军后勤工程学院 | Embedded automatic control pressure vent |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104776262A (en) | 2015-07-15 |
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