CN206468857U - It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve - Google Patents
It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve Download PDFInfo
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- CN206468857U CN206468857U CN201621355670.6U CN201621355670U CN206468857U CN 206468857 U CN206468857 U CN 206468857U CN 201621355670 U CN201621355670 U CN 201621355670U CN 206468857 U CN206468857 U CN 206468857U
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Abstract
It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve, belong to pipe safety protection technique field.Including main valve cavity, the main valve piston being arranged in the main valve chamber body, big ball float and main valve air slot, be arranged on the cylinder on the main valve piston top, be arranged on the pilot valve of the external side of the main valve chamber, the small floating ball being arranged in pilot valve and pilot valve air slot and pilot valve top match somebody with somebody press mechanism.Using with pressure principle, couple pilot valve in the outside of main valve cavity, pilot valve is constituted by pilot valve cavity and with press mechanism, distributing valve valve is driven to move up and down by the floating of small floating ball in pilot valve, realize and the auto-control of gas flow is distributed, then drive main valve piston action, promote the big ball float in main valve chamber body to automatically return to original position, discharge next section of gas, the continuous exhaust pneumatic wallop under the alternate operating mode of gas column is realized, the utility model design science, principle is simple, easy to process, intake and exhaust effect is good.
Description
Technical field
The utility model is related to a kind of air inlet and exhaust valve, specifically a kind of to enter row based on the two-chamber external coupling type total head with pressure principle
Air valve, belongs to pipe safety protection technique field.
Background technology
In large-scale irrigation engineering or long distance water transfer project, water is made in pressure flow impact interception air and cutout up again
Hammer is the emphasis of pipe-line system security protection, and gas accumulation influences flow in that can reduce the efficiency of pipeline flow and pump in pipeline
Accurate measurement, it is often more important that huge pressure oscillations can be produced when pipeline air exhaust water is not smooth, or even pipeline breaking can be caused, produce
Raw huge economic losses, it is known that 80% booster phenomenon is relevant with pipeline gassiness.Air inlet and exhaust valve is a kind of is used in purging line
Gas, at the same when occurring vacuum in pipeline into pipeline gas injection to prevent from producing the device of gas explosion and cut-off water hammer in pipeline.
Common air inlet and exhaust valve mainly has four classes in current China market：High pressure micro air inlet and exhaust valve, low-voltage high speed enter row
Air valve, combined type air inlet and exhaust valve and air-cylinder type air inlet and exhaust valve.Micro air inlet and exhaust valve exhaust outlet bore very little, is only available for pipeline
Micro exhaust during normal work, it is impossible to which discharge system runs for the first time, a large amount of gases for overhauling or producing during other operating modes.At a high speed
Air inlet and exhaust valve and combined type air inlet and exhaust valve can discharge a large amount of gases produced under above-mentioned operating mode, but run into the alternate operating mode of gas column
When, after drained first paragraph gas, ball float under big exhaust outlet will not open exhaust again because of the effect of gas support, so can not be carried out continuously
Exhaust.Air-cylinder type air inlet and exhaust valve is to overcome ball float because gas support acts on the problem of can not automatically opening up exhaust using cylinder principle,
But it still suffers from water leakage situation seriously, and the part such as pin, lever is easy to wear, the low problem of service life.And it is in actual production
During it is high to manufacturing technique requirent, production difficulty is very big.
Utility model content
The purpose of this utility model is：In large-scale irrigation pipe-networks engineering, the deficiency existed for existing air inlet and exhaust valve,
There is provided a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, using with pressure principle, join in the outside of main valve cavity
Pilot valve is connect, pilot valve is constituted by pilot valve cavity and with press mechanism, driven and moved above and below distributing valve valve by the floating of small floating ball in pilot valve
Work, realization is distributed the auto-control of gas flow, then drives main valve piston to act, and the big ball float in promotion main valve chamber body is certainly
It is dynamic to return to original position, next section of gas is discharged, the continuous exhaust pneumatic wallop under the alternate operating mode of gas column is realized, meanwhile, using external connection pilot valve
Form regulation and control distribution is carried out to gas flow in main valve, it is to avoid it is mutually dry in action with press mechanism and main valve piston
Disturb, the utility model design science, principle is simple, and easy to process, intake and exhaust effect is good, the pipeline for solving extensive pipe network is pacified
Full problem has especially important meaning.
The technical solution of the utility model is as follows：It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve, bag
Include main valve cavity, main valve piston, the big ball float being arranged in main valve chamber body, the cylinder for being arranged on the main valve piston top, institute
Main valve cavity bottom is stated provided with main valve valve port, it is characterized in that, the main valve piston includes piston boit, is placed in the cylinder of cylinder inner cavity
Piston, piston boit one end is connected with cylinder piston, and the other end is stretched into be connected in main valve chamber body with big ball float, and the cylinder head is set
There is micro-exhaust valve, cylinder sidewall is provided with the big exhaust outlet communicated with outside atmosphere；The main valve chamber is associated with pilot valve cavity in vitro,
Pilot valve cavity bottom is provided with pilot valve valve port, and pilot valve valve port is connected with main valve cavity by airway tube, is provided with the pilot valve cavity
Small floating ball, pilot valve cavity top, which is provided with, matches somebody with somebody press mechanism；
It is described to include with press mechanism with pressure chamber, be placed in the upper flap and lower Disc, four air guide channels in pressure chamber,
By being connected with pressure connecting rod between upper and lower flap, at the top of upper flap and with being provided with spring, lower Disc bottom between pressure chamber roof
Provided with connecting rod, the connecting rod is passed through with pressure cavity bottom, stretched into pilot valve cavity, and is connected with small floating ball；Described four are led
Gas passage be respectively connect pilot valve cavity and the air guide channel I with pressure chamber, be connected match somebody with somebody the air guide channel II for pressing chamber and cylinder,
Connection matches somebody with somebody the small exhaust outlet for pressing chamber and air, connection and presses air guide with upper flap epicoele in pressure chamber and matching somebody with somebody for lower Disc cavity of resorption
Pipe, the airway tube can play a part of balancing upper and lower cavity air pressure when upper lower Disc is acted；Two are driven by the floating of small floating ball
Flap is moved up and down, so as to control the keying of corresponding air guide channel, realizes and the auto-control of gas flow is distributed.
Further, the main valve cavity, the inside bottom of pilot valve cavity are respectively equipped with section for U-shaped main valve air guide
Groove, pilot valve air slot, in side wall, level opens up four osculums to two air slots respectively.
Further, the main valve piston also includes the sealing baffle being placed in main valve chamber body, and the sealing baffle is connected to
Piston boit, the vertical applied force area of the cylinder piston upper surface is more than the vertical applied force area of the sealing baffle lower surface.
Further, the sealing baffle is provided with sealing ring with main valve cavity contact position.
Further, the air guide channel I is higher than air guide channel II and the company with pressure chamber with the junction with pressure chamber
Place is met, the small exhaust outlet is with the junction with pressure chamber higher than air guide channel I and the junction with pressure chamber.(with pressure connecting rod
Length be equal to air guide channel II and the junction with pressure chamber to small exhaust outlet with the distance between the junction for pressing chamber,
When ensureing that air guide channel II is closed, gas can be discharged by small exhaust outlet, realize the micro exhaust under normal operation.
Further, the cylinder includes upper cylinder body and lower cylinder body two parts, is connected by bolt；The main valve cavity
Including upper valve body and lower valve body two parts, it is connected also by bolt.
Further, the pilot valve cavity is connected with pressure chamber by welding manner.
Further, the main valve valve port is arranged in the lower cavity wall of the main valve cavity, and main valve valve port passes through ring flange
Or be connected with externally threaded connecting tube with irrigation pipeline or supply channel.
Further, the main valve cavity and pilot valve cavity use cast steel material, main valve air slot, pilot valve air slot with
Large and small ball float is made using stainless steel material, and airway tube is made using copper tube.
Compared with prior art, the utility model has the advantages that：
First, the most essential distinction of the utility model and other air inlet and exhaust valves is that this air inlet and exhaust valve is utilized with pressure principle,
Couple pilot valve in the outside of main valve cavity, pilot valve is constituted by pilot valve cavity and with press mechanism, passes through the floating of small floating ball in pilot valve
Drive distributing valve valve to move up and down, realize and the auto-control of gas flow is distributed, then drive main valve piston action, promote master
Big ball float in valve chamber automatically returns to original position, discharges next section of gas, realizes the continuous exhaust pneumatic wallop under the alternate operating mode of gas column,
The utility model design science, principle is simple, and easy to process, intake and exhaust effect is good.
Second, the utility model will be separated with press mechanism and main valve piston, using the form of external connection pilot valve to main valve
Interior gas flow carries out regulation and control distribution, it is to avoid the interfering in action with press mechanism and main valve piston, simplifies device
Structure, improve the stability of plant running.
3rd, the utility model can realize the high speed exhaust in the whole pressure limits of pipeline, when producing negative pressure in pipeline,
Air can be injected into pipeline, the water hammer produced to alleviate water column to hit boosts；When there is a large amount of gases in pipeline, no matter gas
Whether group presses, or with the presence or absence of the alternate situation of multistage gas column, is attained by the effect of high speed exhaust.
4th, the utility model main chamber valve body is interior to be not present the structure members such as pin, lever, overcomes the base part long-term
It is immersed in easy-to-rust in water, lever construction unstable, the problem of exhaust effect is not good caused by situations such as easily occurring stuck enters
One step improves the intake and exhaust effect of this patent.
5th, the utility model dexterously with laminated structure is matched somebody with somebody, is driven by pilot valve small floating ball and floated with pressure connecting rod, finally
Air guide channel of the connection with press mechanism and air can be closed, sealing leak preventing effect is reached, solves air inlet and exhaust valve in the course of work
In the seepy question that often occurs.
6th, the utility model changes the flow direction that current enter main chamber valve body by way of setting air slot, eliminates
Current and gas directly impact the active force of ball float, solve hollow float easy quilt in the case of having high pressure, big pneumatic hammer or water hammer
The problem of compressive strain.
The problem of solving existing air inlet and exhaust valve exhaust effect difference under the alternate operating mode of gas column of the utility model novelty,
The popularization and application device has a high potential in large-scale irrigation pipe network system or water supply pipline system, will obtain significant economic society
Can benefit.
Brief description of the drawings
Fig. 1 is a kind of structural representation based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle of the utility model；
Fig. 2 is A portions enlarged drawing in Fig. 1；
In figure：1 cylinder, 2 main valve cavitys, 3 are with pressure chamber, 4 cylinder pistons, 5 sealing baffles, the big ball float of 6 main valves, 7 main valves
Air slot, 8 main valve air slot osculums, 9 micro-exhaust valves, 10 main valve valve ports, 11 big exhaust outlets, 12 sealing rings, 13 pilot valve chambers
Body, 14 pilot valve valve ports, 15 pilot valve small floating balls, 16 pilot valve air slots, 17 pilot valve air slot osculums, 18 springs, 19 connection pilot valves
Valve body is connected the air guide channel II with press mechanism and cylinder, the small exhaust outlet of 21 pilot valves, 22 with the air guide channel I, 20 with press mechanism
With pressure upper flap, 23 with pressure flap, 24 with pressure connecting rod, 25 piston boits, 26 airway tubes, 27 connecting rods, 28 upper flap epicoeles,
29 lower Disc cavity of resorptions, 30 are with pressure airway tube.
Embodiment
As shown in figure 1, a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, including cylinder 1, main valve cavity
2nd, the three parts of pilot valve cavity 13.
Main valve piston, hollow big ball float 6 and main valve air slot 7 are provided with main valve chamber body.Main valve is coupled to outside pilot valve cavity 13
Cavity 2, it is interior provided with small floating ball 15, pilot valve air slot 16 and with press mechanism.Two panels flap 22,23, valve up and down are included with press mechanism
Between valve by with pressure connecting rod 24 connect, the top of upper flap 22 set match somebody with somebody pressing spring 18, lower Disc 23 by connecting rod 27 with it is small
Ball float 15 is connected.
With there are four air guide channels in press mechanism, respectively connect pilot valve valve body and match somebody with somebody the air guide channel I 19 of press mechanism, connect
Connect the air guide channel II 20 with press mechanism and cylinder, connection small exhaust outlet 21 and connection with press mechanism and air and match somebody with somebody press mechanism
Upper flap epicoele 28 is with lower Disc cavity of resorption 29 with pressure airway tube 30, and the airway tube can be played in balance when upper lower Disc is acted
The effect of cavity of resorption air pressure.
The top of cylinder 1 sets micro-exhaust valve 9, the pressure-air for being collected in cylinder is slowly discharged, while playing energy dissipating
The effect of Slow Close.
Main valve air slot 7 and pilot valve air slot 16 are respectively equipped with main valve and pilot valve cavity, air slot changes current and entered
The flow direction of main chamber valve body, eliminates the impulsive force of current and gas directly to hollow float.Air slot sidewall horizontal opens up four
Draining aperture (main valve air slot osculum 8, pilot valve air slot osculum 17), when (big/small) ball float is with water level decreasing, water
Stream can be discharged by corresponding osculum, ball float is returned to origin-location.
Cylinder 1 includes being bolted upper cylinder body and lower cylinder body together, and main valve cavity 4 includes being bolted
Upper valve body together and lower valve body, together with cylinder piston is bolted with piston boit.Pilot valve cavity 13 is with matching somebody with somebody press
Structure 3 is connected by welding manner.
Main valve piston includes piston boit and is separately positioned on the cylinder piston 4 and sealing baffle 5 of piston boit upper and lower ends,
The vertical applied force area of cylinder piston upper surface is more than the vertical applied force area of the sealing baffle lower surface.
Sealing baffle is provided with sealing ring 12 with main valve cavity junction.
Main valve valve port 10 is arranged in the lower cavity wall of main valve cavity, and main valve valve port is by ring flange or with externally threaded company
Adapter is connected with pipeline.Pilot valve valve port 14 is arranged in the lower cavity wall of pilot valve cavity, is connected by airway tube with main valve cavity 2
Connect.
The main part of main valve and pilot valve uses cast steel material, and air slot is made with ball float using stainless steel material, air guide
Pipe is made using copper tube, can be made with press mechanism, cylinder assembly etc. in the form of sub-assembly, material is true according to actual requirement
It is fixed.
The course of work of the utility model under each state：
(1) low-voltage high speed exhaust process：When starting water filling in pipe, big ball float rests on lower position, and gas is by leading
Tracheae, imports via main valve cavity and pilot valve cavity and matches somebody with somebody press mechanism, then by entering with the air guide channel in press mechanism on main valve
Portion's cylinder, cylinder promotes main valve piston downward actuation, opens the big exhaust outlet of main valve, discharges large quantity of air.The process is mainly used to
The a large amount of gases produced when discharge system is run for the first time.
(2) high pressure micro exhaust process：When air is drained, pilot valve valve internal water accumulation, pilot valve small floating ball floats, and promotes with pressure
Connecting rod is moved upwards, and connection cylinder and the air guide channel with press mechanism are blocked with pressure flap, is stopped high in a large amount of exhausts, cylinder
Body of calming the anger slowly is discharged by the micro exhaust outlet in cylinder top, plays the effect of energy dissipating Slow Close.Simultaneously fortune is continued up with pressure connecting rod
Dynamic, air guide channel of the connection with press mechanism and air is opened, and gas is discharged into air by small exhaust outlet, realizes that water is normally defeated in pipe
Micro exhaust when sending.
(3) sealing leakproof process：When being full of water in pilot valve, moved upwards with press mechanism connecting rod, lower Disc blocks connection
Air guide channel with press mechanism and main valve cavity, then current cannot be introduced into press mechanism, reach the effect of sealing leakproof.
(4) continuous exhaust pneumatic wallop process：When next section of gas column arrives, because valve body is pipeline peak, gas is collected in valve
In vivo, the ponding between pilot valve air slot and small floating ball is discharged from the small discharge outlet of pilot valve air slot, pilot valve small floating ball declines
Initial position is returned to, the air guide channel for connecting pilot valve and cylinder is again turned on, and gas push main valve piston is moved downward, big exhaust
Mouth is opened can carry out high speed exhaust again, discharge next section of gas column, so as to overcome ball float because the effect of gas support can not the row of automatically opening up
The problem of gas.
(5) air inlet tonifying Qi process：When pump stops, and negative pressure is produced in in-pipe flow sky or chance pipe, the big ball float decline of main valve,
Big Exhaust Open, suction air ensures pipe safety.
Most essential distinction with other air inlet and exhaust valves is that this air inlet and exhaust valve is utilized with pressure principle, in the outside of main valve cavity
Couple pilot valve, pilot valve is constituted by pilot valve cavity and with press mechanism, driven by the floating of small floating ball in pilot valve above and below distributing valve valve
Action, realizes and the auto-control of gas flow is distributed, and then drives main valve piston action, promotes the big ball float in main valve chamber body
Original position is automatically returned to, next section of gas is discharged, realizes the continuous exhaust pneumatic wallop under the alternate operating mode of gas column, so as to overcome ball float in row
Go out the problem of can not returning to origin-location after first paragraph gas.
The utility model will be separated with press mechanism and main valve piston, using the form of external connection pilot valve to gas in main valve
Flow direction carries out regulation and control distribution, it is to avoid the interfering in action with press mechanism and main valve piston, simplifies the structure of device,
Improve the stability of plant running.
The utility model eliminates lever in original air inlet and exhaust valve, sends the structure of nail to avoid the base part to soak for a long time simultaneously
Duck in drink easy-to-rust, lever construction is unstable, the problem of exhaust effect is not good caused by situations such as easily occurring stuck.This reality
With new by can finally close air guide channel of the connection with press mechanism and air with laminated structure, sealing leak preventing effect is reached, is solved
The seepy question that air inlet and exhaust valve of having determined often occurs in the course of the work.The utility model changes water by way of setting air slot
Stream enters the flow direction of main chamber valve body, eliminates the active force that current and gas directly impact ball float, solving hollow float is having
The problem of being easily crushed out of shape in the case of high pressure, big pneumatic hammer or water hammer.
The utility model is ingenious in design, scientific in principle, it is easy to accomplish, it can be achieved to arrange at a high speed in pipeline whole pressure limit
Gas, applied widely, intake and exhaust effect is good.
Claims (9)
1. it is a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, including main valve cavity (2), main valve piston, setting
Big ball float (6) in main valve chamber body, the cylinder (1) for being arranged on the main valve piston top, the main valve cavity bottom are provided with
Main valve valve port (10), it is characterized in that, the main valve piston includes piston boit (25), is placed in the cylinder piston (4) of cylinder inner cavity, living
Stick harness one end is connected with cylinder piston, and the other end is stretched into be connected in main valve chamber body with big ball float, and the cylinder head is provided with micro
Air bleeding valve (9), cylinder sidewall is provided with the big exhaust outlet (11) communicated with outside atmosphere；The main valve chamber is associated with pilot valve cavity in vitro
(13), pilot valve cavity bottom is provided with pilot valve valve port (14), and pilot valve valve port is connected by airway tube (26) with main valve cavity, described to lead
Small floating ball (15) is provided with valve chamber, pilot valve cavity top, which is provided with, matches somebody with somebody press mechanism；
It is described to include with press mechanism with pressure chamber (3), be placed in and led with the upper flap (22) and lower Disc (23) in pressure chamber, four
By being connected with pressure connecting rod (24) between gas passage, upper and lower flap, at the top of upper flap and with being provided with spring between pressure chamber roof
(18), lower Disc bottom be provided with connecting rod (27), the connecting rod pass through with pressure cavity bottom, stretch into pilot valve cavity, and with it is small
Ball float is connected；Four air guide channels are respectively to connect pilot valve cavity to press the air guide channel I (19) of chamber with matching somebody with somebody, be connected with pressure
The small exhaust outlet (21) of air guide channel II (20), connection with pressure chamber and air of chamber and cylinder, connection are matched somebody with somebody in pressure chamber
Flap epicoele (28) is with lower Disc cavity of resorption (29) with pressure airway tube (30)；Driven and moved above and below two flaps by the floating of small floating ball
Make, so as to control the keying of corresponding air guide channel, realize and the auto-control of gas flow is distributed.
2. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
State main valve cavity, the inside bottom of pilot valve cavity and be respectively equipped with section for U-shaped main valve air slot (7), pilot valve air slot (16),
In side wall, level opens up four osculums to two air slots respectively.
3. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
The sealing baffle (5) that main valve piston also includes being placed in main valve chamber body is stated, the sealing baffle is connected to piston boit, and the cylinder is lived
The vertical applied force area on surface is more than the vertical applied force area of the sealing baffle lower surface beyond the Great Wall.
4. it is according to claim 3 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
State sealing baffle and be provided with sealing ring (12) with main valve cavity contact position.
5. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
State air guide channel I with pressure chamber junction higher than air guide channel II with pressure chamber junction, the small exhaust outlet with
Junction with pressure chamber is higher than air guide channel I and the junction with pressure chamber.
6. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
Stating cylinder includes upper cylinder body and lower cylinder body two parts, is connected by bolt；The main valve cavity includes upper valve body and lower valve body
Two parts, are connected also by bolt.
7. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
Pilot valve cavity is stated to be connected by welding manner with pressure chamber.
8. it is according to claim 1 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
State main valve valve port to be arranged in the lower cavity wall of the main valve cavity, main valve valve port is by ring flange or with externally threaded connecting tube
It is connected with irrigation pipeline or supply channel.
9. it is according to claim 2 a kind of based on the two-chamber external coupling type total head air inlet and exhaust valve with pressure principle, it is characterized in that, institute
State main valve cavity and pilot valve cavity uses cast steel material, main valve air slot, pilot valve air slot use stainless steel with large and small ball float
Material is made, and airway tube is made using copper tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621355670.6U CN206468857U (en) | 2016-12-12 | 2016-12-12 | It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621355670.6U CN206468857U (en) | 2016-12-12 | 2016-12-12 | It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206468857U true CN206468857U (en) | 2017-09-05 |
Family
ID=59710858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621355670.6U Withdrawn - After Issue CN206468857U (en) | 2016-12-12 | 2016-12-12 | It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve |
Country Status (1)
| Country | Link |
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| CN (1) | CN206468857U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439123A (en) * | 2016-12-12 | 2017-02-22 | 扬州大学 | Double-chamber external connected type full-pressure suction and exhaust valve based on pressure distribution principle and application method thereof |
-
2016
- 2016-12-12 CN CN201621355670.6U patent/CN206468857U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106439123A (en) * | 2016-12-12 | 2017-02-22 | 扬州大学 | Double-chamber external connected type full-pressure suction and exhaust valve based on pressure distribution principle and application method thereof |
| CN106439123B (en) * | 2016-12-12 | 2018-09-28 | 扬州大学 | It is a kind of based on pressure principle two-chamber external coupling type total head air inlet and exhaust valve and its application process |
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Granted publication date: 20170905 Effective date of abandoning: 20180928 |