CN110145623A - Gas ratio valve - Google Patents
Gas ratio valve Download PDFInfo
- Publication number
- CN110145623A CN110145623A CN201910463683.7A CN201910463683A CN110145623A CN 110145623 A CN110145623 A CN 110145623A CN 201910463683 A CN201910463683 A CN 201910463683A CN 110145623 A CN110145623 A CN 110145623A
- Authority
- CN
- China
- Prior art keywords
- valve
- gas
- chamber
- port
- aperture regulation
- 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.)
- Granted
Links
- 239000007789 gas Substances 0.000 claims abstract description 201
- 230000001105 regulatory effect Effects 0.000 claims abstract description 95
- 238000003860 storage Methods 0.000 claims abstract description 43
- 239000002737 fuel gas Substances 0.000 claims abstract description 13
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 28
- 239000000567 combustion gas Substances 0.000 claims description 4
- 230000008676 import Effects 0.000 claims 1
- 230000003044 adaptive effect Effects 0.000 abstract 1
- 238000009434 installation Methods 0.000 description 8
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000009530 blood pressure measurement Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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
- 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
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/20—Excess-flow valves
- F16K17/22—Excess-flow valves actuated by the difference of pressure between two places in the flow line
- F16K17/32—Excess-flow valves actuated by the difference of pressure between two places in the flow line acting on a servo-mechanism or on a catch-releasing mechanism
-
- 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
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0644—One-way valve
- F16K31/0655—Lift valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a kind of gas ratio valves, comprising: main valve body, the first regulating valve and the second regulating valve, main valve body are interior equipped with fuel gas inlet, gas outlet and the air storage chamber for being connected to fuel gas inlet；First regulating valve is installed in air storage chamber, and the first regulating valve includes the first valve body and aperture regulation component, and the inner cavity of the first valve body is divided into the first chamber and the second chamber by aperture regulation component；First chamber is connected to gas outlet, and the first port by being arranged on the first valve body is connected to air storage chamber；Aperture regulation component adjusts the aperture of the first port by entering to the second intracavitary gas flow；Second regulating valve in gas supply, exhaust and keeps three state switchings by the change of input current.The present invention is combined by the first regulating valve and the second regulating valve, it is compared according to gas outlet pressure and demand pressure, the constantly state of the second regulating valve of adjustment, so that the pressure of gas outlet reaches demand pressure, so that gas ratio valve realizes adaptive adjustment when installing.
Description
Technical field
The present invention relates to gas utensil technical field more particularly to a kind of gas ratio valves.
Background technique
Gas ratio valve is the core control part of gas utensil, is adjusted by the pressure of gas ratio valve and voltage stabilizing function,
Can in the case where the pressure oscillation of fuel gas inlet road stable output pressure, for gas heater, it will be able to guarantee water
Temperature is constant.The discharge characteristic of current gas ratio valve needs work in gas ratio valve installation process by its structure determination
Personnel are set up manually, can not achieve automatic adjusument, inconvenient to use.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of gas ratio valves, have automatic adjusument during installation
Ability is not required to staff and manually adjusts.
To achieve the object of the present invention, the invention adopts the following technical scheme:
A kind of gas ratio valve, comprising:
Main valve body, the interior air storage chamber equipped with fuel gas inlet, gas outlet and the connection fuel gas inlet of the main valve body；
First regulating valve is installed in the air storage chamber, and first regulating valve includes the first valve body and aperture regulation
The inner cavity of component, first valve body is divided into the first chamber and the second chamber by aperture regulation component；Described in the first chamber connection
Gas outlet, and the first port by being arranged on the first valve body is connected to the air storage chamber；The aperture regulation component by into
Enter to the second intracavitary gas flow to adjust the aperture of the first port；And
Second regulating valve is installed on the main valve body, for the change by input current in gas supply, exhaust and holding
Three state switchings, when the second regulating valve is in for gaseity, second regulating valve send the indoor gas of the gas storage
Enter to described second intracavitary, aperture regulation component is driven to increase the aperture of the first port；When the second regulating valve is in exhaust condition
When, the second intracavitary gas is fed through the gas outlet by second regulating valve, and aperture regulation component is driven to reduce first
The aperture of port；When the second regulating valve is in hold mode, the described second intracavitary neither air inlet nor it is vented, the first port
Aperture remains unchanged.
Gas ratio valve of the invention passes through the combination of the first regulating valve and the second regulating valve, can be in pressure measuring unit to combustion
The survey pressure and external control device of gas outlet realize during installation by the gas of gas outlet the control of the second regulating valve
Pressure value adjust to required pressure value, can automatic adjusument, do not need to set up manually, and because adjust for switching second
The driving current of the state of valve is adjusted correspondingly according to the required pressure value of the gas of gas outlet, therefore of the invention
The air-flow variation of gas ratio valve can customize as current-to-pressure characteristic curve, by pulse modulation technology, control combustion gas and go out
The air pressure of mouth reaches requirements, thus can be applied in different types of gas, accurately controls gas flow.
In one embodiment, first valve body includes that adjusting valve casing and cover board, the adjusting valve casing are installed on institute
It states in main valve body, the cover board is removably mounted to outside the main valve body, and the adjusting valve casing and the cover board surround described
The inner cavity of one valve body；First port and the second port are set on the adjusting valve casing.It include adjusting by the first valve body of setting
Valve casing and cover board are saved, convenient for aperture regulation component in the intracorporal installation of the first valve.
In one embodiment, the aperture regulation component includes the diaphragm for separating the first chamber and the second chamber, connection
The aperture regulation rod piece of push plate, the connection push plate of the diaphragm and the aperture regulation of the linkage aperture regulation rod piece
Spring；The push plate is intracavitary positioned at described first, and one end of the aperture regulation rod piece connects the push plate, and the other end corresponds to institute
The setting of the first port is stated, for changing the aperture of the first port；The aperture regulation spring is for driving aperture regulation rod piece certainly
Dynamic reset seals first port.The aperture regulation modular construction of the structure is simple, convenient for production.
In one embodiment, the edge of the diaphragm, which is located in, is adjusted between valve casing and cover board.By the way that diaphragm is arranged
Edge be located in and adjust between valve casing and cover board, convenient for the replacement of diaphragm.
In one embodiment, the aperture regulation rod piece include one end connect the push plate aperture regulation bar and
Set on the aperture regulation plug of the other end of the aperture regulation bar, the aperture regulation plug corresponds to first port and sets
It sets, and is detachably connected the aperture regulation bar；The aperture regulation plug is close to one end of first port for being inserted into
To in first port, the size of the one end of the aperture regulation plug close to the first port is towards the aperture regulation plug
The direction of one end to first port far from first port is gradually reduced.By setting aperture regulation rod piece by removable
The aperture regulation bar and aperture regulation plug composition for unloading connection can be only when the damage of aperture regulation plug seriously needs replacing
Aperture regulation plug is replaced, is not required to replace entire aperture regulation rod piece, reduces maintenance cost.
In one embodiment, second regulating valve is threeway valve arrangement, and second regulating valve includes the second valve
The regulating magnet of suction can be generated after body, switching mechanism and energization to switching mechanism；Second valve body is installed on described
In main valve body, switching gas circuit is equipped in second valve body, the switching gas circuit, which has, is sequentially connected logical air intake duct, working chamber
And gas off-take；The air intake duct, working chamber, gas off-take are respectively communicated with the air storage chamber, the second chamber and gas outlet；The switching
Mechanism is movably arranged in the switching gas circuit；The regulating magnet is installed on the main valve body, for passing through input current
Variation change to the driving force size of switching mechanism, to drive switching mechanism in holding position, inflation position and the exhaust position of position three
Set switching；When switching mechanism is switched to inflation position, air intake duct and working chamber are communicated, the working chamber and the gas off-take not phase
It is logical；When switching mechanism is switched to exhaust position, the air intake duct and working chamber are not communicated with, and the working chamber and gas off-take communicate；
When switching mechanism is switched to holding position, it is not communicated between air intake duct, working chamber and gas off-take.
In one embodiment, the switching gas circuit further includes the uuper valve chamber for being connected to the air intake duct and the working chamber
And the lower valve chamber of the connection working chamber and the gas off-take；The switching mechanism includes being movably arranged in the switching gas circuit
Self-resetting piston component and self-resetting valve port component；The valve port component is set in the lower valve chamber, and
The lower valve chamber is divided into and is connected to the first Room of the working chamber and the second Room for being connected to the gas off-take；The valve port component
Equipped with the gas passageway for being connected to first Room and second Room；The piston component include changer lever and be set to the changer lever
On and be in baffle-like upper valve core and bottom spool；The upper valve core is located in the uuper valve chamber, and the bottom spool is located at institute
It states in second Room.The valve port component pushed by piston component, so that the second regulating valve of threeway valve arrangement only needs a tune
Economize on electricity magnet can drive piston component to switch in three inflation position, exhaust position and holding position positions, reduce the second regulating valve
Cost of manufacture.
In one embodiment, the valve port component includes the pushing block of block, the gear film of annular and the linkage block
Spring, the gas passageway are set on the block, and the gear film connects the block and the second valve around the block
Body；The pushing block spring is for driving block to automatically reset.
In one embodiment, the upper valve core and the bottom spool with changer lever split settings, and with it is described
Changer lever is detachably connected.It is detachably connected with changer lever by setting upper valve core and bottom spool, is convenient for upper valve core and lower valve
The replacement of core.
It in one embodiment, further include the shut-off valve being installed on the main valve body, described in the shut-off valve correspondence
The air inlet of air storage chamber is arranged, for being opened and closed the air inlet of the air storage chamber.Shut-off valve can quickly shut off fuel gas inlet to
Air storage chamber inputs air-flow, so that gas outlet can not have gas discharge rapidly.
Detailed description of the invention
Fig. 1 is the cross-sectional view for inventing gas ratio valve described in an embodiment；
Fig. 2 is the partial structure diagram at position where the first regulating valve；
Fig. 3 is the partial structure diagram at position where the second regulating valve；
Fig. 4 is the partial structure diagram at position where shut-off valve.
In figure:
10, main valve body；11, fuel gas inlet；12, gas outlet；13, air storage chamber；
20, the first regulating valve；30, the first valve body；31, valve casing is adjusted；32, cover board；33, the first chamber；34, the second chamber；35,
First port；36, the second port；40, aperture regulation component；41, diaphragm；42, push plate；43, aperture regulation rod piece；44, aperture
Adjusting rod；45, aperture regulation plug；46, aperture regulation spring；
50, the second regulating valve；60, the second valve body；61, air intake duct；62, working chamber；63, gas off-take；64, uuper valve chamber；65,
Lower valve chamber；66, the first Room；67, second Room；
70, switching mechanism；71, piston component；72, changer lever；73, upper valve core；74, bottom spool；75, push rod spring；76,
Valve port component；77, film is kept off；78, block；781, gas passageway；79, the second switching spring；
80, regulating magnet；81, regulating valve coil brace；82, regulating valve fixed core；83, valve coil is adjusted；84, it adjusts
Valve plunger；
90, shut-off valve；91, line stop valve coil support；92, shut-off valve fixed core；93, shut-off valve coil；94, end valve actuation
Iron core；93, end valve rod；94, shut-off valve plug；95, end valve spring.
Specific embodiment
In the description of the present invention, it is to be understood that, term " length ", " width ", "top", "bottom", "inner", "outside" etc.
The orientation or positional relationship of instruction is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of the description present invention and letter
Change description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construct and
Operation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, " second ", feature can be expressed or
Person implicitly includes one or more of the features.
In the description of the present invention unless specifically defined or limited otherwise, term " connection ", " fixation " should do broad sense reason
Solution, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connection, be also possible to electricity
Connection；It can be directly connected, the connection inside two elements or two can also be can be indirectly connected through an intermediary
The interaction relationship of element.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature "upper" or "lower"
It may include that the first and second features directly contact, also may include that the first and second features are not direct contacts but pass through it
Between other characterisation contact.
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
Referring to Fig. 1, being gas ratio valve of the present invention, including main valve body 10 and it is installed on main valve body 10
First regulating valve 20 and the second regulating valve 50.
Equipped with fuel gas inlet 11, gas outlet 12 and the air storage chamber 13 for being connected to fuel gas inlet 11 in main valve body 10.
As shown in Fig. 2, the first regulating valve 20 is installed in air storage chamber 13, the first regulating valve 20 include the first valve body 30 and
The inner cavity of aperture regulation component 40,30 inner hollow of the first valve body, the first valve body 30 is divided into first by aperture regulation component 40
Chamber 33 and the second chamber 34；First chamber 33 is connected to air storage chamber 13, the first chamber 33 by the first port 35 being arranged on the first valve body 30
Gas outlet 12 is connected to by the second port 36 being arranged on the first valve body 30 again；Aperture regulation component 40 is by entering to second
Gas flow in chamber 34 adjusts the aperture of the first port 35.
Second regulating valve 50 in gas supply, exhaust and keeps three state switchings by the change of input current, when the second tune
When saving valve 50 in for gaseity, the gas in air storage chamber 13 is fed through in the second chamber 34 by the second regulating valve 50, drives aperture
Adjust the aperture that component 40 is gradually increased the first port 35；When the second regulating valve 50 is in exhaust condition, the second regulating valve 50
Gas in second chamber 34 is fed through gas outlet 12, aperture regulation component 40 is driven to reduce the aperture of the first port 35；When
When second regulating valve 50 is in hold mode, the gas in air storage chamber 13 is neither fed through the second chamber 34 by the second regulating valve 50
It is interior, also the gas in the second chamber 34 is not fed through gas outlet 12, the aperture of the first port 35 remains unchanged
Above-mentioned gas ratio valve when work, carries out pressure measurement to the gas at gas outlet 12 by pressure measuring unit,
Pressure measuring unit can be set at gas outlet 12, can also install connection gas ratio valve gas outlet 12 device into
At port.The pressure information of test passes to extraneous control device by pressure measuring unit, and extraneous control device, which passes through, to be received
Pressure information changes the size of current of the second regulating valve 50, drives the working condition of the second regulating valve 50 in gas supply, exhaust and guarantor
Hold three state switchings.When gas is supplied in air storage chamber 13 from fuel gas inlet 11, the second regulating valve 50 is in for gaseity,
Gas in air storage chamber 13 is fed through in the second chamber 34 by the second regulating valve 50, and the gas entered in the second chamber 34 drives aperture
It adjusts component 40 and opens the second port 36, as the amount of the gas entered in the second chamber 34 is more and more, the second port 36
Aperture is also increasing, and the gas entered in the first chamber 33 in air storage chamber 13 is also increasing, because of the connection combustion of the first chamber 33
Gas outlet 12, so the gas of gas outlet 12 is also gradually increased, when extraneous pressure measuring unit measures the gas of gas outlet 12
When the pressure of body reaches required pressure value, extraneous control device changes the size for being input to the electric current of the second regulating valve 50,
The second regulating valve 50 is set to switch to hold mode, at this point, the gas in air storage chamber 13 is neither fed through by the second regulating valve 50
In two chambers 34, also the gas in the second chamber 34 gas outlet 12 is not fed through, the size of the gas in the second chamber 34 is kept not
Become, so that the aperture of the first port 35 remains unchanged, so that the air pressure of the gas at gas outlet 12 is also kept not
Become；When the air pressure of the gas at gas outlet 12 to be reduced, the electric current that control device change is input to the second regulating valve 50 is big
It is small that the second regulating valve 50 is made to enter to exhaust condition, at this point, the gas in air storage chamber 13 is fed through by the stopping of the second regulating valve 50
In second chamber 34, but the gas in the second chamber 34 is fed through gas outlet 12, so that the gas flow in the second chamber 34 tails off,
Aperture regulation component 40 is gradually reduced the aperture of the first port 35 with the reduction movement of the 34 Indoor Air scale of construction of the second chamber, works as the external world
Pressure measuring unit when measuring the gas pressure at gas outlet 12 equal to required pressure value, extraneous control device changes input
To the size of current of the second regulating valve 50, the second regulating valve 50 is made to enter to hold mode, the second regulating valve 50, which enters, keeps shape
After state, the air-flow size of gas outlet 12 is constant, so that pressure remains unchanged.
Therefore gas ratio valve of the invention passes through the combination of the first regulating valve 20 and the second regulating valve 50, can be pressed surveying
It sets and is realized the gas at gas outlet 12 under the control of the pressure measurement and external control device to gas outlet during installation
Pressure value adjust to required pressure value, can automatic adjusument, do not need to set up manually, and because adjust for switching second
The driving current of the state of valve 50 be adjusted correspondingly according to the required pressure value of the gas at gas outlet 12, therefore this
The air-flow variation of the gas ratio valve of invention can customize as current-to-pressure characteristic curve, pass through pulse modulation technology, control combustion
The air pressure of gas outlet 12 reaches requirements, thus can be applied in different types of gas, accurately controls gas flow.
In one embodiment, it as shown in Fig. 2, the first valve body 30 includes adjusting valve casing 31 and cover board 32, adjusts valve casing 31 and pacifies
Loaded in main valve body 10, cover board 32 is installed on outside main valve body 10, adjusts valve casing 31 and cover board 32 surrounds the inner cavity of the first valve body 30；
First port 35 and the second port 36, which are set to, to be adjusted on valve casing 31.It include adjusting valve casing 31 and cover board by the first valve body 30 of setting
32, convenient for installation of the aperture regulation component 40 in the first valve body 30.
Specifically, aperture regulation component 40 includes the diaphragm 41 for separating the first chamber 33 and the second chamber 34, connection diaphragm 41
Push plate 42, connect push plate 42 aperture regulation rod piece 43 and link aperture regulation rod piece 43 aperture regulation spring 46；It pushes away
Plate 42 is located in the first chamber 33, and one end of aperture regulation rod piece 43 connects push plate 42, and corresponding first port 35 setting of the other end is used
In the aperture for changing the first port 35.40 structure of aperture regulation component of the structure is simple, convenient for production.
Preferably, the edge of diaphragm 41, which is located in, is adjusted between valve casing 31 and cover board 32, realizes diaphragm 41 and the first valve body
30 connection.The connection type of diaphragm 41 and the first valve body 30 is convenient for the replacement and installation of diaphragm 41.
Further, aperture regulation rod piece 43 includes the aperture regulation bar 44 of one end connection push plate 42 and is set to aperture tune
The aperture regulation plug 45 of the other end of pole 44, corresponding first port 35 setting of aperture regulation plug 45；Aperture regulation plug
45 close to one end of the first port 35 for being inserted into the first port 35, aperture regulation plug 45 close to the first port 35 one
The direction of the size at end one end towards aperture regulation plug 45 far from the first port 35 to the first port 35 is gradually reduced, to reach
The purpose of the aperture of the first port 35 is adjustable to aperture regulation plug 45.By setting aperture regulation rod piece 43 by detachably connecting
Aperture regulation bar 44 and aperture regulation plug 45 composition connect can be with when aperture regulation plug 45, which damages, seriously to be needed replacing
Only aperture regulation plug 45 is replaced, is not required to replace entire aperture regulation rod piece 43, reduces maintenance cost.
In this embodiment, aperture regulation plug 45 is hemispherical close to one end of the first port 35, aperture regulation plug
45 one end far from the first port 35 are located in air storage chamber 13.In other embodiments, aperture regulation plug 45 is far from the first gas
One end of mouth 35 is also possible to be located in the first chamber 33.
In one embodiment, the second regulating valve 50 is threeway valve arrangement, as shown in figure 3, the second regulating valve 50 includes second
The regulating magnet 80 that switching mechanism 70 can be driven to move after valve body 60, switching mechanism 70 and energization；The installation of second valve body 60
In in main valve body 10, being equipped with switching gas circuit in the second valve body 60, switching gas circuit, which has, is sequentially connected logical air intake duct 61, working chamber
62 and gas off-take 63；Air intake duct 61, working chamber 62, gas off-take 63 are respectively communicated with air storage chamber 13, the second chamber 34 and gas outlet 12；
Switching mechanism 70 is movably arranged in switching gas circuit；Regulating magnet 80 is installed on main valve body 10, for passing through input current
Variation driving switching mechanism 70 switches in holding position, inflation position and exhaust position three position；When switching mechanism 70 is moved to inflation
When position, the second regulating valve 50 is in inflated condition, and air intake duct 61 and working chamber 62 communicate, working chamber 62 and gas off-take 63 not phase
Logical, because working chamber 62 is connected to the second chamber 34, therefore the air-flow in air storage chamber 13 can be by the air intake duct 61 and working chamber that are connected
62 enter in the second chamber 34, and the movement of aperture regulation component 40 is enabled to increase the aperture of the first port 35；When switching mechanism 70
It when being moved to holding position, is not connected between air intake duct 61, working chamber 62 and gas off-take 63, the second regulating valve 50 can not be by air storage chamber
Air-flow in 13 is fed through in the second chamber 34, also the gas in the second chamber 34 can not be drained into gas outlet 12, second is adjusted at this time
Section valve 50 is in hold mode；When switching mechanism 70 is switched to exhaust position, air intake duct 61 and working chamber 62 are not communicated with, working chamber
62 and gas off-take 63 communicate, the gas in the second chamber 34 can enter to combustion gas by the working chamber 62 and gas off-take 63 being connected and go out
Mouthfuls 12, the second regulating valve 50 be in exhaust condition at this time, the gas flow reduction in the second chamber 34, and aperture regulation component 40 is with the
The reduction movement of gas flow reduces the aperture of the first port 35 in two chambers 34, achievees the purpose that reduce 12 pressure of gas outlet.
Further, switching air flue further includes connection air intake duct 61 and the uuper valve chamber 64 of working chamber 62 and is connected to working chamber
62 and gas off-take 63 lower valve chamber 65, switching mechanism 70 includes the self-resetting piston component that is movably arranged in switching gas circuit
71 and self-resetting valve port component 76；Valve port component 76 is set in lower valve chamber 65, and lower valve chamber 65 is divided into connection work
The first Room 66 for making chamber 62 and the second Room 67 for being connected to gas off-take 63；Valve port component 76 is equipped with the first Room 66 of connection and second Room 67
Gas passageway 781；Piston component 71 includes changer lever 72 and upper valve core that is on changer lever 72 and being in baffle-like
73 and bottom spool 74；One end of changer lever 72 connects regulating magnet 80, and the other end passes through the gas outlet of air intake duct 61, uuper valve chamber
64, working chamber 62 stretches in lower valve chamber 65；Upper valve core 73 is movably arranged in uuper valve chamber 64, and bottom spool 74 is movably arranged at second Room
In 67；Regulating magnet 80 is for driving piston component 71 to move in gas circuit, so that piston component 71 is in holding position, inflation position
With the position switching of exhaust position three.Under original state, upper valve core 73 seals the air inlet of working chamber 62, uuper valve chamber 64 and working chamber
62 phases are disconnected, and bottom spool 74 is arranged far from valve port component 76, and the first Room 66 is connected with second Room 67.
The switching mechanism 70 of the structure comprises the following steps under the driving of regulating magnet 80:
A, it is first powered to regulating magnet 80, regulating magnet 80 is made to generate the driving force of F size to piston component 71,
Under the driving of driving force F1, direction of the piston component 71 towards lower valve chamber 65 to uuper valve chamber 64 is mobile, and upper valve core 73 leaves work
The air inlet of chamber 62, uuper valve chamber 64 is connected to working chamber 62, and bottom spool 74 then contacts valve port component 76 and seals gas passageway 781
Air inlet, the first Room 66 and second Room 67 disconnect, and piston component 71 switches to inflation position at this time, when air intake duct 61 is connected to gas source
When, gas enters in working chamber 62 from air intake duct 61 by uuper valve chamber 64, because the first Room 66 and second Room 67 disconnect,
Gas in working chamber 62 enters in the second chamber 34, but can not flow in gas off-take 63 across the first Room 66, second Room 67,
It is entered in the second chamber 34 as the gas in uuper valve chamber 64 constantly passes through working chamber 62, gas increases in the second chamber 34, makes
The aperture for obtaining the first port 35 becomes larger, so that the pressure at gas outlet 12 also becomes larger therewith；When pressure measuring unit measures combustion
When pressure at gas outlet 12 is equal to required pressure value, driving force that regulating magnet 80 generates piston component 71 is from F1
Increase to F2, bottom spool 74 pushes valve port component 76 mobile towards working chamber 62, until upper valve core 73 seal air intake duct 61 into
After port, bottom spool 74 just stops pushing valve port component 76 mobile, and piston component 71 switches to holding position, 61 He of air intake duct at this time
64 phase of uuper valve chamber disconnects, and the first Room 66 is mutually disconnected with the continuation of second Room 67, and the gas in uuper valve chamber 64 can not again supply gas
To working chamber 62, the gas in working chamber 62 can not also pass through the first Room 66, second Room 67 flow to gas off-take 63,62 He of working chamber
The pressure of gas in first chamber 33 remains unchanged, so that the aperture of the first port 35 remains unchanged, so that gas outlet
Pressure at 12 also remains unchanged.
C, it when needing the pressure at gas outlet 12 being decreased to specified pressure value, breaks to regulating magnet 80
Power supply, regulating magnet 80 are applied to the disappearance of the power on piston component 71, and piston component 71 and valve port component 76 automatically reset,
Upper valve core 73 seals the air inlet of working chamber 62 again, disconnects uuper valve chamber 64 mutually with working chamber 62, meanwhile, bottom spool 74 is remote
From valve port component 76, the first Room 66 is made to be connected with second Room 67, piston component 71 is in exhaust position at this time, and air intake duct 61 can not
Working chamber 62 is supplied gas to, but the gas in the second chamber 34 can pass through working chamber 62, the first Room 66, the entrance of second Room 67
To gas off-take 63, the gas in the second chamber 34 is reduced, so that the aperture of the first port 35 reduces, so that gas outlet 12
The pressure at place also reduces therewith, when the pressure at pressure measuring unit measures gas outlet 12 is decreased to specified pressure value, will adjust
The driving force that economize on electricity magnet 80 generates piston component 71 increases to F, so that piston component 71 is moved to holding position, goes out combustion gas
Pressure at mouth 12 remains unchanged.
The piston component of above structure cooperates the valve port component 76 being movably arranged in lower valve chamber 65, can make three-position three-way valve
As long as 50 1 regulating magnets 80 of the second regulating valve of structure can realize piston component 71 in holding position, inflation position and exhaust
The switching of three positions in position is reduced the production cost without two regulating magnets 80.
In this embodiment, upper valve core 73 and bottom spool 74, and can with changer lever 72 with 72 split settings of changer lever
Dismantling connection, in order to the replacement of upper valve core 73 and bottom spool 74.Preferably, upper valve core 73 and bottom spool 74 are sheathed on switching
On bar 72, and it is threadedly coupled with changer lever 72.It is threadedly coupled with changer lever 72 by setting upper valve core 73 and bottom spool 74,
The position of adjustable adjustment according to actual needs upper valve core 73 and bottom spool 74 on changer lever 72, so that upper valve core 73 is under
Spool 74 can accuracy move to specified position.In other embodiments, it is also possible to upper valve core 73 and bottom spool 74 is equal
It is wholely set with changer lever 72.
In other embodiments, can in upper valve core 73 close to the side of working chamber 62 and upper valve core 73 close to air intake duct 61
Gas outlet side be arranged upper valve core elastic layer, for enabling upper valve core 73 closely to seal gas outlet or the work of air intake duct 61
Make the air inlet of chamber 62.Bottom spool elastic layer can be set close to the side of valve port component 76 in bottom spool 74, so that bottom spool 74
The gas outlet in the gas passageway 781 of valve port component 76 can tightly be sealed.Upper valve core elastic layer and bottom spool elastic layer preferably use
Performance is stable, the silica gel material of corrosion-vulnerable is not made.
Optionally, piston component 71 further includes the valve rod part being made of changer lever 72, upper valve core 73 and bottom spool 74 that links
Push rod spring 75, for driving piston component 71 to automatically reset.In the present embodiment, push rod spring 75 is sheathed on changer lever 72
On, push rod spring 75 is located at side of the upper valve core 73 far from bottom spool 74, and the both ends of push rod spring 75 support upper valve core 73 respectively
With the second valve body 60.
Optionally, regulating magnet 80 includes the regulating valve coil brace 81 being installed on the second valve body 60, is installed on tune
It saves the regulating valve fixed core 82 in valve support, the regulating valve coil brace 81 being sheathed on regulating valve fixed core 82, be sheathed on tune
It saves and adjusts the adjusting valve plunger 84 of valve coil 83 and sliding in regulating valve fixed core 82 on valve coil bracket 81；
Adjust the changer lever 72 that valve plunger 84 connects piston component 71.After adjusting the energization of valve coil 83, regulating valve fixed core 82 is right
It adjusts valve plunger 84 and generates the driving force for driving piston component 71 mobile.
Optionally, valve port component 76 includes the second switching spring 79 of block 78, the gear film 77 of annular and linkage block 78,
Gas passageway 781 is set on block 78, and gear film 77 connects block 78 and the second valve body 60 around block 78, so that block 78
Can be mobile relative to valve body, by flow into the gas in the first Room 66 will not between block 78 and the inner wall of the second valve body 60
To second Room 67；Second switching spring 79 is for driving block 78 to automatically reset.Preferably, the second switching spring 79 is sheathed on
On changer lever 72, and it is located at block 78 close to the side of working chamber 62, the both ends of the second switching spring 79 support block 78 respectively
With the second valve body 60.
In one embodiment, it as shown in Figure 1, gas ratio valve further includes the shut-off valve 90 being installed on main valve body 10, cuts
The only air inlet setting of the corresponding air storage chamber 13 of valve 90, for being opened and closed the air inlet of air storage chamber 13.Shut-off valve 90 can rapidly be cut
Disconnected gas port road is to 13 supply air flow of air storage chamber, so that gas outlet 12 can not have gas discharge rapidly.
Have, as shown in figure 4, shut-off valve 90 includes the line stop valve coil support 91 being installed on main valve body 10, installation
In in line stop valve coil support 91 shut-off valve fixed core 92, be sheathed on shut-off valve coil 93 shut-off valve coil 93, sliding
Cut-off valve plunger 94, cut-off valve rod 93 and shut-off valve plug in main valve body 10 in shut-off valve fixed core 92
94 and link shut-off valve plug 94 cut-off valve spring 95；End one end connection cut-off valve plunger 94 of valve rod 93, it is another
End connection shut-off valve plug 94, the air inlet setting of the corresponding air storage chamber 13 of shut-off valve plug 94；Cut-off valve spring 95 is for driving
Shut-off valve plug 94 automatically resets.When shut-off valve 93 no power of coil, restoring force of the shut-off valve plug 94 in cut-off valve spring 95
The air inlet of air storage chamber 13 is tightly sealed under effect, cutting fuel gas inlet 11 supplies the gas of air storage chamber 13；Work as line stop valve
When circle 93 is powered, 92 pairs of cut-off valve plungers 94 of shut-off valve fixed core generate adsorption capacity, drive shut-off valve plug 94 far from gas storage
The air inlet of room 13, so that the air inlet open of air storage chamber 13, so that fuel gas inlet 11 is connected to air storage chamber 13, so that gas
It can enter to air storage chamber 13.
Optionally, cut-off valve spring 95 is sheathed on cut-off valve rod 93, and the both ends of cut-off valve spring 95 support cut-off respectively
Valve plug head 94 and main valve body 10.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of gas ratio valve characterized by comprising
Main valve body (10), the main valve body (10) is interior to be equipped with fuel gas inlet (11), gas outlet (12) and the connection combustion gas
The air storage chamber (13) of import (11)；
First regulating valve (20) is installed in the air storage chamber (13), and first regulating valve (20) includes the first valve body (30)
And aperture regulation component (40), the inner cavity of first valve body (30) are divided into the first chamber (33) by aperture regulation component (40)
With the second chamber (34)；First chamber (33) is connected to the gas outlet (12), and the by being arranged on the first valve body (30)
One port (35) is connected to the air storage chamber (13)；The aperture regulation component (40) passes through the gas that enters in the second chamber (34)
Amount adjusts the aperture of the first port (35)；And
Second regulating valve (50) is installed on the main valve body (10), for by the change of input current gas supply, exhaust and
The switching of three states is kept, when the second regulating valve (50) are in for gaseity, second regulating valve (50) is by the gas storage
Gas in room (13) is fed through in second chamber (34), and aperture regulation component (40) is driven to increase opening for the first port (35)
Degree；When the second regulating valve (50) is in exhaust condition, the gas in the second chamber (34) is sent by second regulating valve (50)
To the gas outlet (12), aperture regulation component (40) is driven to reduce the aperture of the first port (35)；When the second regulating valve
(50) it when being in hold mode, neither air inlet nor is vented in second chamber (34), the aperture of the first port (35) is kept not
Become.
2. gas ratio valve according to claim 1, which is characterized in that first valve body (30) includes adjusting valve casing
(31) it is installed in the main valve body (10) with cover board (32), the adjusting valve casing (31), the cover board (32) is detachably installed
Outside in the main valve body (10), adjusting valve casing (31) and the cover board (32) surround the inner cavity of first valve body (30)；
First port (35) and the second port (36) are set on the adjusting valve casing (31).
3. gas ratio valve according to claim 2, which is characterized in that the aperture regulation component (40) includes by first
The push plate (42) of diaphragm (41), the connection diaphragm (41) that chamber (33) and the second chamber (34) separate, the connection push plate (42)
Aperture regulation rod piece (43) and the linkage aperture regulation rod piece (43) aperture regulation spring (46)；The push plate
(42) it is located in first chamber (33), one end of the aperture regulation rod piece (43) connects the push plate (42), the other end pair
First port (35) is answered to be arranged, for changing the aperture of the first port (35)；The aperture regulation spring (46) is for driving
So that aperture regulation rod piece (43) is automatically reset and seals first port (35).
4. gas ratio valve according to claim 3, which is characterized in that the edge of the diaphragm (41) is located in regulating valve
Between shell (31) and cover board (32).
5. gas ratio valve according to claim 3, which is characterized in that the aperture regulation rod piece (43) includes that one end connects
The aperture regulation for connecing the aperture regulation bar (44) of the push plate (42) and being set to the other end of the aperture regulation bar (44) is stifled
Head (45), corresponding first port (35) setting of the aperture regulation plug (45), and it is detachably connected the aperture regulation
Bar (44)；The aperture regulation plug (45) is close to one end of first port (35) for being inserted into first port
(35) in, the aperture regulation plug (45) close to the one end of the first port (35) size towards the aperture regulation plug
(45) direction of one end to first port (35) far from first port (35) is gradually reduced.
6. gas ratio valve according to claim 1, which is characterized in that second regulating valve (50) is triple valve knot
Structure, second regulating valve (50) include the second valve body (60), switching mechanism (70) and be powered after can be to switching mechanism (70)
Generate the regulating magnet (80) of suction；Second valve body (60) is installed in the main valve body (10), second valve body
(60) switching gas circuit is equipped in, the switching gas circuit, which has, is sequentially connected logical air intake duct (61), working chamber (62) and gas off-take
(63)；The air intake duct (61), working chamber (62), gas off-take (63) be respectively communicated with the air storage chamber (13), the second chamber (34) and
Gas outlet (12)；The switching mechanism (70) is movably arranged in the switching gas circuit；The regulating magnet is installed on described
On main valve body (10), change the driving force size to switching mechanism (70) for the variation by input current, to drive switching
Mechanism (70) switches in holding position, inflation position and exhaust position three position；When switching mechanism (70) is switched to inflation position, air inlet
Road (61) and working chamber (62) communicate, and the working chamber (62) and the gas off-take (63) are not communicated with；When switching mechanism (70) is cut
When changing to exhaust position, the air intake duct (61) and working chamber (62) are not communicated with, and the working chamber (62) and gas off-take (63) communicate；
When switching mechanism (70) is switched to holding position, it is not communicated between air intake duct (61), working chamber (62) and gas off-take (63).
7. gas ratio valve according to claim 6, which is characterized in that the switching gas circuit further includes being connected to the air inlet
It road (61) and the uuper valve chamber (64) of the working chamber (62) and is connected under the working chamber (62) and the gas off-take (63)
Valve chamber (65)；The switching mechanism (70) includes the self-resetting piston component (71) being movably arranged in the switching gas circuit
With self-resetting valve port component (76)；The valve port component (76) is set in the lower valve chamber (65), and by the lower valve
Chamber (65), which is divided into, is connected to the first room (66) of the working chamber (62) and the second Room (67) for being connected to the gas off-take (63)；Institute
It states valve port component (76) and is equipped with the gas passageway (781) for being connected to first room (66) and second Room (67)；The piston component
It (71) include changer lever (72) and upper valve core (73) and bottom spool on the changer lever (72) and that be in baffle-like
(74)；The upper valve core (73) is located in the uuper valve chamber (64), and the bottom spool (74) is located in the second Room (67).
8. gas ratio valve according to claim 7, which is characterized in that the valve port component (76) include block (78),
The gear film (77) of annular and the pushing block spring (79) of the linkage block (78), the gas passageway (781) are set to the block
(78) on, the gear film (77) connects the block (78) and the second valve body (60) around the block (78)；The pushing block
Spring (79) is for driving block (78) to automatically reset.
9. gas ratio valve according to claim 7, which is characterized in that the upper valve core (73) and the bottom spool (74)
With changer lever (72) split settings, and it is detachably connected with the changer lever (72).
10. gas ratio valve according to claim 1, which is characterized in that further include being installed on the main valve body (10)
Shut-off valve (90), the air inlet setting of the corresponding air storage chamber (13) of the shut-off valve (90), for being opened and closed the air storage chamber
(13) air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463683.7A CN110145623B (en) | 2019-05-30 | 2019-05-30 | Gas Proportional Valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910463683.7A CN110145623B (en) | 2019-05-30 | 2019-05-30 | Gas Proportional Valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110145623A true CN110145623A (en) | 2019-08-20 |
| CN110145623B CN110145623B (en) | 2024-04-09 |
Family
ID=67592186
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910463683.7A Active CN110145623B (en) | 2019-05-30 | 2019-05-30 | Gas Proportional Valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110145623B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686097A (en) * | 2019-09-02 | 2020-01-14 | 广东万和热能科技有限公司 | Control method and device for gas proportional valve and storage medium |
| CN111255926A (en) * | 2020-01-19 | 2020-06-09 | 绍兴艾柯电气有限公司 | Gas proportional valve |
| CN115823290A (en) * | 2022-12-28 | 2023-03-21 | 广州市精鼎电器科技有限公司 | Pneumatic type bistable compression ignition air proportion adjusting device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283145B1 (en) * | 2000-02-03 | 2001-09-04 | Cybertech Ventures, Inc. | Proportional control gas valve |
| CN203272886U (en) * | 2013-05-17 | 2013-11-06 | 黄依华 | Gas proportional control valve with dual safety latch function |
| CN105736710A (en) * | 2016-04-11 | 2016-07-06 | 西安丛羽电子科技有限公司 | Proportional control valve |
| CN106481866A (en) * | 2016-11-16 | 2017-03-08 | 广州市精鼎电器科技有限公司 | The multifunctional servo control device being convenient to clean |
| CN108953683A (en) * | 2017-05-18 | 2018-12-07 | 惠州市唐群座椅科技股份有限公司 | Solenoid valve |
| CN110030403A (en) * | 2019-04-15 | 2019-07-19 | 广东万和热能科技有限公司 | A kind of gas ratio valve |
| CN210088099U (en) * | 2019-05-30 | 2020-02-18 | 广东万和热能科技有限公司 | Gas proportional valve |
-
2019
- 2019-05-30 CN CN201910463683.7A patent/CN110145623B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6283145B1 (en) * | 2000-02-03 | 2001-09-04 | Cybertech Ventures, Inc. | Proportional control gas valve |
| CN203272886U (en) * | 2013-05-17 | 2013-11-06 | 黄依华 | Gas proportional control valve with dual safety latch function |
| CN105736710A (en) * | 2016-04-11 | 2016-07-06 | 西安丛羽电子科技有限公司 | Proportional control valve |
| CN106481866A (en) * | 2016-11-16 | 2017-03-08 | 广州市精鼎电器科技有限公司 | The multifunctional servo control device being convenient to clean |
| CN108953683A (en) * | 2017-05-18 | 2018-12-07 | 惠州市唐群座椅科技股份有限公司 | Solenoid valve |
| CN110030403A (en) * | 2019-04-15 | 2019-07-19 | 广东万和热能科技有限公司 | A kind of gas ratio valve |
| CN210088099U (en) * | 2019-05-30 | 2020-02-18 | 广东万和热能科技有限公司 | Gas proportional valve |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110686097A (en) * | 2019-09-02 | 2020-01-14 | 广东万和热能科技有限公司 | Control method and device for gas proportional valve and storage medium |
| CN110686097B (en) * | 2019-09-02 | 2021-07-13 | 广东万和热能科技有限公司 | Control method and device for gas proportional valve and storage medium |
| CN111255926A (en) * | 2020-01-19 | 2020-06-09 | 绍兴艾柯电气有限公司 | Gas proportional valve |
| CN111255926B (en) * | 2020-01-19 | 2021-04-09 | 绍兴艾柯电气有限公司 | Gas proportional valve |
| CN115823290A (en) * | 2022-12-28 | 2023-03-21 | 广州市精鼎电器科技有限公司 | Pneumatic type bistable compression ignition air proportion adjusting device |
| CN115823290B (en) * | 2022-12-28 | 2023-12-05 | 广州市精鼎电器科技有限公司 | Pneumatic bistable gas-air ratio adjusting device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110145623B (en) | 2024-04-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110145623A (en) | Gas ratio valve | |
| CN102803920B (en) | Tire testing device's pneumatic circuit, tire testing device, and tire testing method | |
| KR20150026265A (en) | Method for controlling pressure of fuel cell stack | |
| RU2009145998A (en) | GAS PUMP MIXER WITH VARIABLE INLET | |
| CN109854560A (en) | A kind of high-voltage electrical apparatus proportioning valve | |
| CN204114272U (en) | Pneumatic oxygen economizer and assisted breathing system | |
| CN209638129U (en) | A kind of high-voltage electrical apparatus proportioning valve | |
| CN111006135B (en) | High-efficient portable gas pressure regulating measurement sled | |
| CN204448441U (en) | A kind of adhesive supplier | |
| CN210664949U (en) | Air tightness and back pressure tester | |
| CN108644454B (en) | Electrical integrated control system for adjusting type pneumatic actuating mechanism | |
| CN210088099U (en) | Gas proportional valve | |
| CN218566779U (en) | Standard leak hole calibration device | |
| CN207848515U (en) | Pressure-regulating valve component | |
| JPH11324963A (en) | Pressure control method for screw compressor | |
| CN114964758A (en) | Portable calibration equipment of idle call pressure switch | |
| CN217560938U (en) | Portable calibration equipment of idle call pressure switch | |
| CN216524772U (en) | Testing arrangement is used in pneumatic control valve production | |
| CN111022736A (en) | Evaporating pressure regulating valve capable of electrically regulating pressure | |
| KR101836656B1 (en) | Fuel cell system for vihicle and method for controlling the same | |
| CN113093824B (en) | High-precision air pressure controller applied to adjustment of initial position of water level sensor bolt | |
| CN110094570A (en) | Electromagnetism three-position three-way valve | |
| CN212900030U (en) | Small-sized pilot-operated gas electric control valve | |
| CN104344048A (en) | Liquid level regulating device and liquid level regulating method | |
| CN204362359U (en) | Multifunctional bedside lamp employing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |