CN202300654U - State switching valve and system - Google Patents

State switching valve and system Download PDF

Info

Publication number
CN202300654U
CN202300654U CN 201120284165 CN201120284165U CN202300654U CN 202300654 U CN202300654 U CN 202300654U CN 201120284165 CN201120284165 CN 201120284165 CN 201120284165 U CN201120284165 U CN 201120284165U CN 202300654 U CN202300654 U CN 202300654U
Authority
CN
China
Prior art keywords
oil
outlet
valve
fuel
air
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.)
Expired - Fee Related
Application number
CN 201120284165
Other languages
Chinese (zh)
Inventor
梁战辉
王红莲
黄谭喜
李斐
薛二鹏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AECC South Industry Co Ltd
Original Assignee
China National South Aviation Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by China National South Aviation Industry Co Ltd filed Critical China National South Aviation Industry Co Ltd
Priority to CN 201120284165 priority Critical patent/CN202300654U/en
Application granted granted Critical
Publication of CN202300654U publication Critical patent/CN202300654U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Abstract

The utility model provides a state switching valve and a state switching system. The state switching system comprises a nozzle valve, a nozzle connecting piece, an air pressure suction device, an air valve and the state switching valve, wherein the nozzle valve comprises a first inlet which is connected with an oil outlet hole of the state switching valve and a first outlet which is operably communicated with the first inlet; the nozzle connecting piece comprises a fuel oil inlet which is connected with the first outlet, a fuel oil outlet which is operably communicated with the fuel oil inlet, and an air inlet which is communicated with the fuel oil outlet; the air valve comprises a high pressure air outlet which is connected with the air inlet and a high pressure air inlet which is operably communicated with the high pressure air outlet; the air pressure suction device is provided with the oil outlet hole; and a first oil discharge outlet and a second oil discharge outlet of the state switching valve and a control port of the air valve are in communication connection with the air pressure suction device. By the utility model, effects of switching the large state of a gas turbine into the small state and timely eliminating remaining oil in a pipeline can be achieved, and the operating reliability of the gas turbine is improved.

Description

State exchange valve and system
Technical field
The utility model relates to the gas turbine field, especially, relates to a kind of fuel feeding state exchange valve of gas turbine.In addition, the utility model also relates to a kind of state transition system that comprises above-mentioned state exchange valve.
Background technique
Gas turbine when the little state, need cut out the oil circuit of one group of nozzle from big state exchange.(big state is meant slow train and the above state of slow train, and little state is meant the state of starting and parking slow train.Yet the oil circuit of shut-off nozzle needs mechanical structure to realize.And after the nozzle oil circuit was closed, remaining fuel oil must be got rid of immediately in the pipeline of pass close point to nozzle, long-pending Jiao of cracking to avoid remaining fuel oil Yin Gaowen, and then plug nozzle, thereby the reliability of reduction gas turbine operation.
Do not exist this type of mechanical structure to come the oil circuit of shut-off nozzle as yet in the relevant at present existing technology.
The model utility content
The utility model purpose is to provide a kind of state exchange valve and system, but to solve oil circuit that does not have shut-off nozzle in the related art as yet and the technical problem of removing the mechanical structure of the excess oil in the pipeline that closes close point to nozzle.
For realizing above-mentioned purpose, an aspect according to the utility model provides a kind of state exchange valve, comprises housing, sleeve and valve core, and wherein, the sleeve fixed cover places in the housing; Valve core movable sheath places in the sleeve; Housing comprises closed end and opening end; The barrel of housing is provided with oil inlet hole, oil outlet and the fuel-economizing mouth that runs through; The contiguous closed end of oil inlet hole, and oil outlet is between oil inlet hole and fuel-economizing mouth; The barrel of housing also is provided with first oil drain out and second oil drain out that runs through, the contiguous closed end of first oil drain out; One section sidewall of the contiguous closed end of valve core is provided with a groove; The valve core is away from the end wall of an end of the groove blind hole that extended internally; The valve core is provided with first hole and second hole of running through with blind hole; When the valve core was positioned at the primary importance of contiguous closed end, oil inlet hole, oil outlet and first oil drain out connected through groove each other, and first hole and fuel-economizing mouth stagger, and second hole and second oil drain out stagger; When the valve core was positioned at the second place away from closed end, oil inlet hole, oil outlet and first oil drain out were intercepted each other, the perforation of aliging with the fuel-economizing mouth of first hole, the perforation of aliging with second oil drain out of second hole.
Further, opening end is connected with a friction top; The state exchange valve also comprises an elasticity; The two ends of elasticity are respectively against friction top and valve core.
Further, the side-walls of valve core neighbouring open end is provided with a protruding circle; The inwall of friction top is provided with a boss; Elasticity is a spring; One end of elasticity is placed on boss, and the other end is placed on the valve core and against protruding circle.
According to the utility model on the other hand; A kind of state transition system also is provided; It comprises above-mentioned state exchange valve, nozzle valve, nozzle link, air pressure aspirator and air register; Wherein, the nozzle valve comprises first inlet that is connected with oil outlet, and first outlet that operationally connects with first inlet; The nozzle link comprise fuel filler that one and first outlet is connected, and the fuel outlet that operationally connects with fuel filler and with the air inlet of fuel outlet perforation; Air register comprises that the high pressure air that is connected with the air inlet of nozzle link exports and operationally exports the high pressure air inlet that connects with high pressure air that air register also comprises the control mouth; The air pressure aspirator is provided with an oil outlet, and first oil drain out, second oil drain out and control mouth all are connected with the perforation of air pressure aspirator.
Further, state transition system also comprises flow nipple, and wherein, the two ends of flow nipple connect respectively and connect the fuel-economizing mouth and first outlet.
Further, state transition system also comprises the filter of buffering oil; The filter of buffering oil comprises second inlet that is connected with first oil drain out and second outlet that connects with second inlet; Second outlet connects with the air pressure aspirator and is connected.
Further, the nozzle valve comprises first plug of operationally blocking first outlet and first elasticity that is resisted against first plug; The nozzle link also is provided with check valve and is placed on second elasticity of check valve and the nozzle unlatching oil-in relative with check valve.
Further, air register also is provided with the 3rd piston and is resisted against the 3rd elasticity of the 3rd piston.
The utlity model has following beneficial effect:
Through the utility model, can reach gas turbine from big state to the conversion of little state and can in time remove the effect of the excess oil the pipeline, and then improve the reliability of gas turbine operation.
Except top described purpose, feature and advantage, the utility model also has other purpose, feature and advantage.To do further detailed explanation to the utility model with reference to figure below.
Description of drawings
The accompanying drawing that constitutes the application's a part is used to provide the further understanding to the utility model, and illustrative examples of the utility model and explanation thereof are used to explain the utility model, do not constitute the improper qualification to the utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the state transition system of the utility model preferred embodiment; And
Fig. 2 is the structural representation of the state exchange valve of the utility model preferred embodiment.
Embodiment
Embodiment to the utility model is elaborated below in conjunction with accompanying drawing, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
Referring to Fig. 1, state transition system comprises state exchange valve 1, also comprises nozzle valve 2, flow nipple 3, nozzle link 4, buffering oil filter 5, air pressure aspirator 6, air register 7 and oil drainage main 8.
Please combine referring to Fig. 2, this state exchange valve 1 comprises housing 11, sleeve 13, valve core 15, friction top 17 and elasticity 19.Wherein, sleeve 13 fixed covers place in the housing 11.Valve core 15 movable sheaths place in the sleeve 13.
Housing 11 is cylindric, comprises a closed end 111 and opening end 113.
Sleeve 13 is cylindric for what connect, and sleeve 13 can insert and fixed cover places in the housing 11 from the mode that opening end 113 is sentenced interference fit.The outer side wall of sleeve 13 is provided with a plurality of recessed circles, is nested with seal ring in each recessed circle, and then makes sealing and fixing between sleeve 13 and the housing 11, to prevent fuel leakage.
The barrel of housing 11 is provided with the oil inlet hole 110 that runs through sleeve 13 sidewalls.Oil inlet hole 110 is close to closed ends 111, and is connected with fuel manifold 10, so that to this state exchange valve 1 fuel feeding.The contiguous oil inlet hole of the barrel of housing 11 110 places also are disposed with oil outlet 115 and the fuel-economizing mouth 119 that runs through sleeve 13 sidewalls.Wherein, oil outlet 115 is between oil inlet hole 110 and fuel-economizing mouth 119.
The barrel of housing 11 also is provided with first oil drain out 117 and second oil drain out 112 that runs through sleeve 13 sidewalls.First oil drain out 1117 and second oil drain out 112 and oil inlet hole 110, oil outlet 115 and fuel-economizing mouth 119 can be relative the barrel that is arranged at housing 11.The closed end 111 of first oil drain out, 117 contiguous housings 1.And first oil drain out 117 and oil inlet hole 110 are roughly on same plane.The opening end 113 of second oil drain out, 112 contiguous housings 1.
Valve core 15 can be for cylindric, and valve core 15 enters in the sleeve 3 from the opening of sleeve 13, thereby movable sheath places in the sleeve 3.
The periphery that valve core 15 contiguous housing 11 closed ends are 111 1 sections caves inward and forms the groove 150 of an annular.The end face axial of the end that valve core 15 and this groove 150 are relative is extended with a blind hole 155.Valve core 15 is provided with first hole 157 that connects with blind hole 155.These first hole, 157 adjacent recess 150, and operationally align with fuel-economizing mouth 119 in first hole 157.Valve core 15 also is provided with second hole 159 that connects with blind hole 155.This second hole 159 is away from groove 150, and second hole 159 operationally aligns with second oil drain out 112, and contiguous housing 11 opening ends 113.The outside in valve core 15 contiguous second holes 159 outwards convexes with a protruding circle 156, with an end face of backstop sleeve 13.
When the primary importance of the closed end 111 of the contiguous housings 11 of valve core 15, and the protruding circle 156 of valve core 15 is during with backstop sleeve 13, and the oil inlet hole 110 of housing 11, oil outlet 115 and first oil drain out 117 connect through the groove 150 of valve core 15 each other.Staggering with the fuel-economizing mouth 119 of housing 11 in first hole 157 of valve core 15, staggers with second oil drain out 112 of housing 11 in second hole 159 of valve core 15.
When valve core 15 during away from the second place of the closed end 111 of housing 11, the oil inlet hole 110 of housing 11, oil outlet 115 and first oil drain out 117 are intercepted each other, and promptly oil inlet hole 110, oil outlet 115 and first oil drain out 117 do not communicate.The perforation of aliging with the fuel-economizing mouth 119 of housing 11 of first hole 157 of valve core 15, second hole 159 of valve core 15 perforation of aliging with second oil drain out 112 of housing 11.
Friction top 17 is installed on the opening end 13 of housing 11.Friction top 17 can cooperate through the mode that is threaded with opening end 13.The inwall of friction top 17 is provided with a boss 171.
This elasticity 19 can be spring.One end of elasticity 19 is placed on the boss 171 of friction top 17, and against the madial wall of friction top 17.The other end of spring is placed on valve core 15 and against protruding circle 156.
Nozzle valve 2 comprises first plug 25 and is resisted against first elasticity 251 of first plug 25.First elasticity 251 can be spring.First plug 25 is movably set in the nozzle valve 2, and first outlet 23 of first plug, 25 shutoff nozzle valve 2.Nozzle valve 2 also comprise one be connected with oil outlet 115 first the inlet 21.Open first outlet 23 the time when first plug 25, first inlet 21 is connected perforations with first outlet 23,21 flows to first and exports 23 thereby the fuel oil warp first of state exchange valve 1 is entered the mouth.The two ends of flow nipple 3 connect first outlet 23 of the fuel-economizing mouth 119 and the nozzle valve 2 of coupled condition changeover valve 1 respectively.
First side 42 of nozzle link 4 is provided with fuel filler 41 and air inlet 43.This fuel filler 41 connects with first outlet 23 of nozzle valve 2 and is connected.
Nozzle link 4 be provided with fuel outlet 45 with first side, 42 second side surface opposite 44, fuel outlet 45 is connected with nozzle.This air inlet 43 is oppositely arranged and connects with fuel outlet 45.
In the nozzle link 4, between fuel filler 41 and fuel outlet 45, also be provided with check valve 48.Check valve 48 is equipped with second elasticity 49, and this second elasticity 49 can be spring.The two ends of second elasticity 49 are respectively against check valve 48 and piston base 40.
Being provided with nozzle with check valve 48 relative sides and opening oil-in 47 of nozzle link 4, this nozzle is opened oil-in 47 and is connected with control oil channel, is used for supplying high pressure fuels to nozzle link 4.
When gas turbine is in big state, in first oil drain out 117 of state exchange valve 1, and flow nipple 3 interior the reaching in the pipeline that are connected with first outlet 23 of nozzle valve 2 be full of fuel oil.
Buffering oil filter 5 comprises 51 and second outlet 53 of second inlet.Second inlet 51 connects with first oil drain out 117 of state exchange valve 1 through oil drainage main 8 and is connected.Second outlet 53 connects with second oil drain out 112 through oil drainage main 8 and is connected.
Also be provided with second piston 55 in the buffering oil filter 5.When the atmospheric pressure in the oil drainage main 8 was filtered the pressure imbalance in 5 with buffering oil, second piston 55 carried out piston motion.
Air pressure aspirator 6 connects with each other with second oil drain out 112 and second outlet 53 respectively through oil drainage main 8.Air pressure aspirator 6 also comprises a fuel outlet 61.
Air register 7 comprises control mouth 71 that is connected with air pressure aspirator 6 through oil drainage main 8 and the high pressure air outlet 73 that is connected with air inlet 43 perforations of nozzle link 4.
Air register 7 also is provided with one and connects the high pressure air is connected with the high-pressure air pipe of supply high pressure air and enter the mouth 75.Wherein, high pressure air inlet 75 and high pressure air outlet 73 can be arranged on the relative both sides of air register 7.Also be provided with the 3rd piston 77 and the 3rd elasticity 79 in the air register 7.The 3rd elasticity 79 can be spring.The two ends of the 3rd elasticity 79 are resisted against the 3rd piston 77 and base 70 respectively.
When the operating mode of gas turbine was in big state, air pressure aspirator 6 was not worked.The high pressure air inlet 75 of air register 7 is intercepted with high pressure air outlet 73; The 3rd elasticity 79 is in compressive state.Second inlet, 51 and second outlet 53 of buffering oil filter 5 connects each other, and through the oil pressure in first oil drain out 117 of the air pressure balance in the oil drainage main 8, avoids the fuel oil in first oil drain out 117 to flow to buffering oil filter 5.
Nozzle is opened oil-in 47 and is opened, and high pressure fuel is pushed the check valve 48 of nozzle link 4 and first plug 25 of nozzle valve 2 open.First inlet 21 is connected perforation with first outlet 23; Fuel filler 41 connects with fuel outlet 45 each other.At this moment, first elasticity 251 and second elasticity 49 all are in compressive state.
The pressure in the elastic force of the elasticity 19 in the state exchange valve 1 and the oil drainage main 8 and the gravitational equilibrium of valve core 15, thus make oil inlet hole 110, oil outlet 115 and first oil drain out 117 of housing 11 connect each other through the groove 150 of valve core 15.Staggering with the fuel-economizing mouth 119 of housing 11 in first hole 157 of valve core 15, staggers with second oil drain out 112 of housing 11 in second hole 159 of valve core 15.
Fuel oil in the fuel manifold 10 gets into groove 150 through oil inlet hole 110, and through oil outlet 115 and first inlet, 21 flow nozzle valve 2; Again through first outlet 23 and the fuel filler 41 flow nozzle links 4.Afterwards, the fuel oil in the nozzle link 4 is through the ejection of fuel outlet 45 flow nozzles.
When the operating mode of gas turbine from big state during to little state exchange, the nozzle that at first reduces nozzle link 4 is opened the oil pressure of the high pressure fuel at 47 places, oil-in.First elasticity 251 and second elasticity 49 reset.Thereby, make check valve 48 that fuel filler 41 and fuel outlet 45 are intercepted; First plug 25 of nozzle valve 2 is blocked first outlet 23.
The then electromagnet energising work of air pressure aspirator 6.When air pressure aspirator 6 is bled, make that the air pressure in the oil drainage main 8 reduces.At this moment, the valve core 15 of state exchange valve 1 under the effect of gravity away from the closed end 111 of housing 11, and pressure elasticity thing 19.The oil inlet hole 110 of housing 11, oil outlet 115 and first oil drain out 117 are intercepted, thereby make the fuel oil in the fuel manifold 10 can't enter in the state exchange valve 1 the stop supplies fuel oil.
The perforation of aliging with the fuel-economizing mouth 119 of housing 11 of first hole 157 of valve core 15, second hole 159 of valve core 15 perforation of aliging with second oil drain out 112 of housing 11.
Meanwhile, the 3rd elasticity 79 forces 77 motions of the 3rd piston, and high pressure air inlet 75 and high pressure air outlet 73 are connected each other.
Excess oil in first oil drain out 117 is in second inlet 51 that cushions oil filter 5 enters into buffering oil filter 5.Second piston 55 in the buffering oil filter 5 is released second outlet 53 with the excess oil in the buffering oil filter 5 under the effect of atmospheric pressure, excess oil and then flow to oil drainage main 8.
Excess oil in the nozzle valve 2 enters in the blind hole 155 of valve core 15 through flow nipple 3, fuel-economizing mouth 119 and first hole 157 successively.Excess oil in the blind hole 155 and then flow to oil drainage main 8 through second hole 159, second oil drain out 112 successively.Excess oil in the oil drainage main 8 enters into air pressure aspirator 6, and then discharges through the fuel outlet 61 of air pressure aspirator 6.
High pressure air in the high-pressure air pipe is through the high pressure air inlet 75 high pressure air outlet 73 of flowing through, and then is blown in the nozzle through the air inlet 43 of nozzle link 4, thereby the excess oil in the nozzle is blown out.Check valve 48 in the nozzle link 4 has stopped that high pressure air enters into fuel pipe simultaneously.
More than be that gas turbine is from the overall process of big state to little state exchange.
When gas turbine needs from little state during to big state exchange, the electromagnet outage of air pressure aspirator 6, piston is toward extrapolation gas, thereby makes the atmospheric pressures in the oil drainage main 8 increase.
Second piston 55 in the buffering oil filter 5 up moves because of the effect of atmospheric pressure.
Valve core 15 in the state exchange valve 1 resets under the effect of the elastic force of the effect of atmospheric pressure and elasticity 19.And then oil inlet hole 110, oil outlet 115 and first oil drain out 117 connect through the groove of valve core 15 150 and connect, and fuel-economizing mouth 119 and second oil drain out 112 are intercepted with first hole 157 and second hole 159 of valve core 15 respectively.Fuel oil in the fuel manifold 10 enters in the groove 150 through the oil inlet hole 110 of state exchange valve 1, and then enters in the nozzle valve 2.
The 3rd piston 77 of air register 7 moves towards the end away from control mouth 71 under the effect of atmospheric pressure, and compresses the 3rd elasticity 79.Thereby make high pressure air inlet 75 and high pressure air outlet 73 intercept.
Open the nozzle of nozzle link 4 and open oil-in 47, thereby make high pressure fuel that first plug 25 of nozzle valve 2 is pushed open.First inlet 21 of nozzle valve 2 connects with first outlet 23 and is connected.Fuel oil flows to nozzle link 4 through nozzle valve 2.Simultaneously, high pressure fuel is pushed check valve 48 open, and then makes fuel oil flow to the nozzle place.At this moment, realize of the conversion of the little state of gas turbine to big state operating mode.
Apparently, in other embodiments, this state transition system also can need not to be provided with flow nipple 3 and buffering oil filter 5.First oil drain out 117 is directly connected connect air pressure aspirator 6.
The preferred embodiment that the above is merely the utility model is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within the spirit and principle of the utility model, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection domain of the utility model.

Claims (8)

1. a state exchange valve is characterized in that, comprises housing (11), sleeve (13) and valve core (15), wherein,
Said sleeve (13) fixed cover places in the said housing (11);
Said valve core (15) movable sheath places in the said sleeve (13);
Said housing (11) comprises closed end (111) and opening end (113);
The barrel of said housing (11) is provided with oil inlet hole (110), oil outlet (115) and the fuel-economizing mouth (119) that runs through;
The contiguous said closed end (111) of said oil inlet hole (110), and said oil outlet (115) is positioned between said oil inlet hole (110) and the said fuel-economizing mouth (119);
The said barrel of housing (11) also is provided with first oil drain out (117) and second oil drain out (112) that runs through, the contiguous said closed end (111) of said first oil drain out (117);
One section sidewall of the contiguous said closed end of said valve core (15) (111) is provided with a groove (150);
Said valve core (15) is away from the end wall of an end of said groove (150) blind hole (155) that extended internally;
Said valve core (15) is provided with first hole (157) and second hole (159 of running through with said blind hole (155));
When said valve core (15) is positioned at the primary importance of contiguous said closed end (111); Said oil inlet hole (110), said oil outlet (115) and said first oil drain out (117) connect through said groove (150) each other; Staggering with said fuel-economizing mouth (119) in said first hole (157), staggers with said second oil drain out (112) in said second hole (159);
When said valve core (15) is positioned at the second place away from said closed end (111); Said oil inlet hole (110), said oil outlet (115) and said first oil drain out (117) are intercepted each other; Said first hole (157) perforation of aliging with said fuel-economizing mouth (119), said second hole (159) perforation of aliging with said second oil drain out (112).
2. state exchange valve according to claim 1 is characterized in that,
Said opening end (113) is connected with a friction top (17);
Said state exchange valve also comprises an elasticity (19);
The two ends of said elasticity (19) are respectively against said friction top (17) and said valve core (15).
3. state exchange valve according to claim 2 is characterized in that,
The side-walls of the contiguous said opening end of said valve core (15) (113) is provided with a protruding circle (156);
The inwall of said friction top (17) is provided with a boss (171);
Said elasticity (19) is a spring;
One end of said elasticity (19) is placed on said boss (171), and the other end is placed on said valve core (15) and against said protruding circle (156).
4. a state transition system is characterized in that, said state transition system comprises any described state exchange valve (1) in nozzle valve (2), nozzle link (4), air pressure aspirator (6), air register (7) and the claim 1 to 3, wherein,
Said nozzle valve (2) comprises first inlet (21) that is connected with said oil outlet (115), and first outlet (23) that operationally connects with said first inlet (21);
Said nozzle link (4) comprise one and said first fuel filler (41) that is connected of outlet (23), and the fuel outlet (45) that operationally connects with said fuel filler (41) and with the air inlet (43) of said fuel outlet (45) perforation;
Said air register (7) comprises the high pressure air outlet (73) that is connected with the air inlet (43) of said nozzle link and operationally exports the high pressure air inlet (75) that (73) connect with said high pressure air that said air register (7) also comprises control mouthful (71);
Said air pressure aspirator (6) is provided with an oil outlet (61), and said first oil drain out (117), said second oil drain out (112) and said control mouthful (71) all are connected with said air pressure aspirator (6) perforation.
5. state transition system according to claim 4 is characterized in that,
Said state transition system also comprises flow nipple (3), wherein,
The two ends of said flow nipple (3) connect respectively and connect said fuel-economizing mouth (119) and said first outlet (23).
6. state transition system according to claim 4 is characterized in that,
Said state transition system also comprises buffering oil filter (5);
Said buffering oil filter (5) comprises second inlet (51) that is connected with said first oil drain out (117) and second outlet (53) that connects with said second inlet (51);
Said second outlet (53) connects with said air pressure aspirator (6) and is connected.
7. state transition system according to claim 6 is characterized in that,
Said nozzle valve (2) comprises first plug (25) of operationally blocking said first outlet (23) and first elasticity (251) that is resisted against said first plug (25);
Said nozzle link (4) also is provided with check valve (48) and is placed on second elasticity (49) of said check valve (48) and the nozzle unlatching oil-in (47) relative with said check valve (48).
8. state transition system according to claim 7 is characterized in that,
Said air register (7) also is provided with the 3rd piston (77) and is resisted against the 3rd elasticity (79) of said the 3rd piston (77).
CN 201120284165 2011-08-05 2011-08-05 State switching valve and system Expired - Fee Related CN202300654U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201120284165 CN202300654U (en) 2011-08-05 2011-08-05 State switching valve and system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201120284165 CN202300654U (en) 2011-08-05 2011-08-05 State switching valve and system

Publications (1)

Publication Number Publication Date
CN202300654U true CN202300654U (en) 2012-07-04

Family

ID=46369574

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201120284165 Expired - Fee Related CN202300654U (en) 2011-08-05 2011-08-05 State switching valve and system

Country Status (1)

Country Link
CN (1) CN202300654U (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287268A (en) * 2011-08-05 2011-12-21 中国南方航空工业(集团)有限公司 State transition valve and system
CN107013339A (en) * 2017-05-28 2017-08-04 西安成立航空制造有限公司 A kind of aero-engine fuel nozzle main combustion stage working connection valve and its application method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287268A (en) * 2011-08-05 2011-12-21 中国南方航空工业(集团)有限公司 State transition valve and system
CN102287268B (en) * 2011-08-05 2013-10-30 中国南方航空工业(集团)有限公司 State transition valve and system
CN107013339A (en) * 2017-05-28 2017-08-04 西安成立航空制造有限公司 A kind of aero-engine fuel nozzle main combustion stage working connection valve and its application method
CN107013339B (en) * 2017-05-28 2023-09-26 中国航发商用航空发动机有限责任公司 Main fuel level main oil way valve for aeroengine fuel nozzle and use method thereof

Similar Documents

Publication Publication Date Title
CN102287268B (en) State transition valve and system
CN202300654U (en) State switching valve and system
CN101614292B (en) Backflow preventer
CN203757101U (en) Emergency cut-off safety device
CN204345034U (en) A kind of compressed natural gas guide electromagnetic valve
CN204781251U (en) Vacuum drainage system
CN201992149U (en) Low-temperature safety valve
CN204387386U (en) A kind of vacuum diaphragm valve of simple structure
CN205634674U (en) Pneumatic single track hangs gas circuit interlocking protection device
CN209743605U (en) Gas combination valve
CN210739004U (en) Double-pipeline explosion-proof valve
CN211259750U (en) One-way interface gas circuit replacing device
CN204784886U (en) A multifunctional valve
CN210662323U (en) Drainage bypass system of large valve
CN107120528A (en) A kind of integrated cylinder valve of novel high-pressure gas storage
CN209540166U (en) A kind of loss of novel free floating ball type zero water trap
CN209688180U (en) A kind of discharging device that automatic water stopping is non-return, shower faucet and water supply elbow
CN203214991U (en) Low-leakage high-sealing valve
CN202971418U (en) High-reliability direct-acting safety valve device with hydraulic balance principle
CN206708726U (en) A kind of novel high-pressure gas storage integrates cylinder valve
CN206647567U (en) A kind of plastic air intake manifold one-way valve structures
CN102192347B (en) Low-temperature safety valve
CN201547347U (en) Backflow preventer
CN214008829U (en) Cylinder valve for gas cylinder and gas cylinder
CN212337639U (en) Automatic oil return device in vacuum pump

Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 412002 Dong Jiaduan, Zhuzhou, Hunan

Patentee after: China Hangfa South Industrial Co. Ltd.

Address before: 412002 Dong Jiaduan, Zhuzhou, Hunan

Patentee before: China Southern Airlines Industry (Group) Co., Ltd.

CF01 Termination of patent right due to non-payment of annual fee
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20120704

Termination date: 20200805