CN110145623B - Gas Proportional Valve - Google Patents
Gas Proportional Valve Download PDFInfo
- Publication number
- CN110145623B CN110145623B CN201910463683.7A CN201910463683A CN110145623B CN 110145623 B CN110145623 B CN 110145623B CN 201910463683 A CN201910463683 A CN 201910463683A CN 110145623 B CN110145623 B CN 110145623B
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- valve
- gas
- air
- cavity
- opening
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- 239000007789 gas Substances 0.000 claims abstract description 184
- 230000001105 regulatory effect Effects 0.000 claims abstract description 113
- 239000002737 fuel gas Substances 0.000 claims abstract description 32
- 230000008859 change Effects 0.000 claims abstract description 8
- 230000007246 mechanism Effects 0.000 claims description 28
- 238000012423 maintenance Methods 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- 230000007423 decrease Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 abstract description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000903 blocking effect Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005516 engineering process Methods 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
- 239000012528 membrane Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction 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
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- 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
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- 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 fuel gas proportional valve, which comprises: the main valve body is internally provided with a fuel gas inlet, a fuel gas outlet and a gas storage chamber communicated with the fuel gas inlet; the first regulating valve is arranged in the gas storage chamber and comprises a first valve body and an opening regulating assembly, and the inner cavity of the first valve body is divided into a first cavity and a second cavity by the opening regulating assembly; the first cavity is communicated with a fuel gas outlet and is communicated with the gas storage chamber through a first gas port arranged on the first valve body; the opening adjusting component adjusts the opening of the first air port through the amount of the air entering the second cavity; the second regulating valve is switched between the air supply state, the air discharge state and the holding state by a change in the input current. According to the invention, the first regulating valve and the second regulating valve are combined, and the state of the second regulating valve is continuously regulated according to the comparison between the pressure of the gas outlet and the required pressure, so that the pressure of the gas outlet reaches the required pressure, and the gas proportional valve is self-adaptively regulated during installation.
Description
Technical Field
The invention relates to the technical field of gas appliances, in particular to a gas proportional valve.
Background
The fuel gas proportional valve is a core control component of the fuel gas appliance, and can stabilize output pressure under the condition of pressure fluctuation of a fuel gas inlet channel through the pressure regulation and pressure stabilization functions of the fuel gas proportional valve, so that the constant water temperature of the fuel gas water heater can be ensured. The flow characteristic of the existing fuel gas proportional valve is determined by the structure, and the fuel gas proportional valve is manually set by a worker in the installation process, so that self-adaptive adjustment cannot be realized, and the fuel gas proportional valve is inconvenient to use.
Disclosure of Invention
The invention aims to solve the technical problem of providing a fuel gas proportional valve which has self-adaptive adjustment capability during installation and does not need manual adjustment by a worker.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a gas proportioning valve, comprising:
the main valve body is internally provided with a fuel gas inlet, a fuel gas outlet and a gas storage chamber communicated with the fuel gas inlet;
the first regulating valve is arranged in the gas storage chamber and comprises a first valve body and an opening regulating assembly, and the inner cavity of the first valve body is divided into a first cavity and a second cavity by the opening regulating assembly; the first cavity is communicated with the fuel gas outlet and is communicated with the gas storage chamber through a first gas port arranged on the first valve body; the opening adjusting component adjusts the opening of the first air port through the amount of the air entering the second cavity; the method comprises the steps of,
the second regulating valve is arranged on the main valve body and is used for switching among three states of air supply, air exhaust and maintenance through the change of input current, and when the second regulating valve is in an air supply state, the second regulating valve sends the air in the air storage chamber into the second cavity to drive the opening regulating component to increase the opening of the first air port; when the second regulating valve is in an exhaust state, the second regulating valve sends the gas in the second cavity to the gas outlet to drive the opening regulating component to reduce the opening of the first gas port; when the second regulating valve is in a holding state, the second cavity is neither in air intake nor in air exhaust, and the opening degree of the first air port is kept unchanged.
The gas proportional valve can adjust the pressure value of the gas at the gas outlet to a required pressure value when the pressure measuring device measures the pressure of the gas at the gas outlet and the external control device controls the second regulating valve through the combination of the first regulating valve and the second regulating valve, can be adjusted in a self-adaptive mode, does not need manual adjustment, and can be used for accurately controlling the gas flow because the driving current for switching the state of the second regulating valve is correspondingly adjusted according to the required pressure value of the gas at the gas outlet.
In one embodiment, the first valve body comprises an adjusting valve casing and a cover plate, the adjusting valve casing is installed in the main valve body, the cover plate is detachably installed outside the main valve body, and the adjusting valve casing and the cover plate enclose an inner cavity of the first valve body; the first air port and the second air port are arranged on the adjusting valve casing. Through setting up first valve body including adjusting valve casing and apron, the installation of aperture regulation subassembly in first valve body of being convenient for.
In one embodiment, the opening degree adjusting assembly comprises a diaphragm separating a first cavity from a second cavity, a push plate connected with the diaphragm, an opening degree adjusting rod connected with the push plate, and an opening degree adjusting spring linked with the opening degree adjusting rod; the pushing plate is positioned in the first cavity, one end of the opening adjusting rod piece is connected with the pushing plate, and the other end of the opening adjusting rod piece is arranged corresponding to the first air port and used for changing the opening of the first air port; the opening adjusting spring is used for driving the opening adjusting rod piece to automatically reset and seal the first air port. The opening adjusting assembly of the structure is simple in structure and convenient to manufacture.
In one embodiment, the diaphragm is sandwiched between the valve housing and the cover plate at its edge. The edge part of the diaphragm is clamped between the adjusting valve casing and the cover plate, so that the diaphragm can be replaced conveniently.
In one embodiment, the opening adjusting rod piece comprises an opening adjusting rod with one end connected with the push plate and an opening adjusting plug arranged at the other end of the opening adjusting rod, and the opening adjusting plug is arranged corresponding to the first air port and is detachably connected with the opening adjusting rod; the opening adjusting plug is used for being inserted into the first air port at one end close to the first air port, and the size of one end of the opening adjusting plug close to the first air port gradually decreases towards the direction from one end of the opening adjusting plug away from the first air port to the first air port. The opening adjusting rod piece is composed of the opening adjusting rod and the opening adjusting plug which are detachably connected, when the opening adjusting plug is seriously damaged and needs to be replaced, the opening adjusting plug can be replaced only, the whole opening adjusting rod piece does not need to be replaced, and maintenance cost is reduced.
In one embodiment, the second regulating valve is of a three-way valve structure, and comprises a second valve body, a switching mechanism and a regulating electromagnet capable of generating suction force to the switching mechanism after being electrified; the second valve body is arranged in the main valve body, a switching gas circuit is arranged in the second valve body, and the switching gas circuit is provided with a gas inlet channel, a working cavity and a gas outlet channel which are sequentially communicated; the air inlet channel, the working cavity and the air outlet channel are respectively communicated with the air storage chamber, the second cavity and the fuel gas outlet; the switching mechanism is movably arranged in the switching air path; the regulating electromagnet is arranged on the main valve body and is used for driving the switching mechanism to switch among a holding position, an inflating position and an exhausting position by changing the driving force of the switching mechanism through the change of input current; when the switching mechanism is switched to the inflation position, the air inlet channel is communicated with the working cavity, and the working cavity is not communicated with the air outlet channel; when the switching mechanism is switched to the exhaust position, the air inlet channel is not communicated with the working cavity, and the working cavity is communicated with the air outlet channel; when the switching mechanism is switched to the holding position, the air inlet channel, the working cavity and the air outlet channel are not communicated.
In one embodiment, the switching gas path further includes an upper valve cavity communicating the gas inlet channel and the working cavity, and a lower valve cavity communicating the working cavity and the gas outlet channel; the switching mechanism comprises a piston assembly capable of automatically resetting and a valve port assembly capable of automatically resetting which are movably arranged in the switching gas circuit; the valve port assembly is arranged in the lower valve cavity and divides the lower valve cavity into a first chamber communicated with the working cavity and a second chamber communicated with the air outlet channel; the valve port assembly is provided with a gas passage which is communicated with the first chamber and the second chamber; the piston assembly comprises a switching rod, an upper valve core and a lower valve core which are arranged on the switching rod and are both in a baffle shape; the upper valve core is positioned in the upper valve cavity, and the lower valve core is positioned in the second chamber. The valve port assembly pushed by the piston assembly enables the second regulating valve of the three-way valve structure to drive the piston assembly to switch among the three positions of the inflating position, the exhausting position and the holding position only by one regulating electromagnet, and reduces the manufacturing cost of the second regulating valve.
In one embodiment, the valve port assembly comprises a stop block, an annular blocking film and a push block spring, wherein the push block spring is used for linking the stop block, the gas passage is arranged on the stop block, and the blocking film surrounds the stop block and is connected with the stop block and the second valve body; the pushing block spring is used for driving the stop block to reset automatically.
In one embodiment, the upper valve core and the lower valve core are both separately arranged with the switching rod and are both detachably connected with the switching rod. Through setting up the case and lower case and all being connected with the selector lever can be dismantled, the change of the case of being convenient for case and lower case.
In one embodiment, the air storage device further comprises a stop valve arranged on the main valve body, wherein the stop valve is arranged corresponding to the air inlet of the air storage chamber and used for opening and closing the air inlet of the air storage chamber. The stop valve can rapidly cut off the gas inlet from inputting the gas flow into the gas storage chamber, so that the gas outlet can rapidly avoid gas discharge.
Drawings
FIG. 1 is a cross-sectional view of a fuel gas proportional valve according to an embodiment of the invention;
FIG. 2 is a schematic view of a part of the structure of the first regulating valve;
FIG. 3 is a schematic view of a part of the structure of the portion where the second regulating valve is located;
fig. 4 is a schematic view of a part of the structure of the portion where the stop valve is located.
In the figure:
10. a main valve body; 11. a gas inlet; 12. a gas outlet; 13. an air storage chamber;
20. a first regulating valve; 30. a first valve body; 31. adjusting the valve housing; 32. a cover plate; 33. a first chamber; 34. a second chamber; 35. a first gas port; 36. a second gas port; 40. an opening degree adjusting component; 41. a membrane; 42. a push plate; 43. an opening degree adjusting rod member; 44. an opening adjusting rod; 45. an opening adjusting plug; 46. an opening degree adjusting spring;
50. a second regulating valve; 60. a second valve body; 61. an air inlet channel; 62. a working chamber; 63. an air outlet channel; 64. an upper valve cavity; 65. a lower valve cavity; 66. a first chamber; 67. a second chamber;
70. a switching mechanism; 71. a piston assembly; 72. a switching lever; 73. an upper valve core; 74. a lower valve core; 75. a push rod spring; 76. a valve port assembly; 77. a blocking film; 78. a stop block; 781. a gas aisle; 79. a second switching spring;
80. adjusting an electromagnet; 81. an adjusting valve coil bracket; 82. an adjusting valve fixed iron core; 83. a regulating valve coil; 84. an adjusting valve movable iron core;
90. a stop valve; 91. a shut-off valve coil holder; 92. a stop valve fixed iron core; 93. a shutoff valve coil; 94. a stop valve plunger; 93. a shut-off valve stem; 94. a stop valve plug; 95. and a stop valve spring.
Detailed Description
In the description of the present invention, it should be understood that the terms "length," "width," "top," "bottom," "inner," "outer," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second", or the like, may include one or more such features, either explicitly or implicitly.
In the description of the present invention, unless explicitly stated and limited otherwise, the terms "connected," "secured" and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween.
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
Referring to fig. 1, the fuel gas proportional valve according to the present invention includes a main valve body 10, and a first regulating valve 20 and a second regulating valve 50 mounted on the main valve body 10.
The main valve body 10 is internally provided with a fuel gas inlet 11, a fuel gas outlet 12 and a gas storage chamber 13 communicated with the fuel gas inlet 11.
As shown in fig. 2, the first regulating valve 20 is installed in the air storage chamber 13, the first regulating valve 20 comprises a first valve body 30 and an opening degree regulating assembly 40, the interior of the first valve body 30 is hollow, and the inner cavity of the first valve body 30 is divided into a first cavity 33 and a second cavity 34 by the opening degree regulating assembly 40; the first cavity 33 is communicated with the air storage chamber 13 through a first air port 35 arranged on the first valve body 30, and the first cavity 33 is communicated with the fuel gas outlet 12 through a second air port 36 arranged on the first valve body 30; the opening degree adjustment assembly 40 adjusts the opening degree of the first gas port 35 by the amount of gas that enters into the second chamber 34.
The second regulating valve 50 is switched among three states of air supply, air exhaust and maintenance through the change of input current, when the second regulating valve 50 is in an air supply state, the second regulating valve 50 sends the air in the air storage chamber 13 into the second cavity 34, and the opening regulating assembly 40 is driven to gradually increase the opening of the first air port 35; when the second regulating valve 50 is in the exhaust state, the second regulating valve 50 sends the gas in the second cavity 34 to the gas outlet 12 to drive the opening regulating assembly 40 to reduce the opening of the first gas port 35; when the second regulating valve 50 is in the holding state, the second regulating valve 50 neither feeds the gas in the gas storage chamber 13 into the second chamber 34 nor feeds the gas in the second chamber 34 into the gas outlet 12, and the opening degree of the first gas port 35 is kept unchanged
The gas proportional valve is characterized in that the pressure measuring device is used for measuring the pressure of the gas at the gas outlet 12 during operation, and the pressure measuring device can be arranged at the gas outlet 12 or can be provided with a gas inlet of a device communicated with the gas outlet 12 of the gas proportional valve. The pressure measuring device transmits the tested pressure information to an external control device, and the external control device changes the current of the second regulating valve 50 through the received pressure information to drive the working state of the second regulating valve 50 to switch among air supply, air exhaust and maintenance states. When the gas is supplied into the gas storage chamber 13 from the gas inlet 11, the second regulating valve 50 is in a gas supply state, the second regulating valve 50 sends the gas in the gas storage chamber 13 into the second cavity 34, the gas entering into the second cavity 34 drives the opening regulating assembly 40 to open the second gas port 36, the opening of the second gas port 36 is also larger and larger along with the increasing amount of the gas entering into the second cavity 34, the gas entering into the first cavity 33 in the gas storage chamber 13 is also larger and larger along with the increasing amount of the gas entering into the first cavity 33, because the first cavity 33 is communicated with the gas outlet 12, the gas of the gas outlet 12 is also gradually increased, when the pressure measuring device of the outside measures that the pressure of the gas outlet 12 reaches a required pressure value, the external control device changes the magnitude of the current input into the second regulating valve 50, so that the second regulating valve 50 is switched to a holding state, at this time, the second regulating valve 50 neither sends the gas in the gas storage chamber 13 into the second cavity 34 nor the gas outlet 12, and the magnitude of the gas in the second cavity 34 is kept unchanged, so that the gas in the second cavity 34 is kept unchanged, and the gas opening of the gas outlet 12 is kept unchanged; when the gas pressure of the gas at the gas outlet 12 is to be reduced, the control device changes the magnitude of the current input to the second regulating valve 50 so that the second regulating valve 50 enters the exhaust state, at this time, the second regulating valve 50 stops feeding the gas in the gas storage chamber 13 into the second chamber 34, but feeds the gas in the second chamber 34 into the gas outlet 12 so that the gas amount in the second chamber 34 becomes smaller, the opening regulating assembly 40 gradually reduces the opening of the first gas port 35 along with the reducing action of the gas amount in the second chamber 34, and when the external pressure measuring device measures that the gas pressure at the gas outlet 12 is equal to the required pressure value, the external control device changes the magnitude of the current input to the second regulating valve 50 so that the second regulating valve 50 enters the holding state, and after the second regulating valve 50 enters the holding state, the gas flow magnitude of the gas outlet 12 is unchanged so that the pressure is kept unchanged.
Therefore, the gas proportional valve of the present invention can adjust the pressure value of the gas at the gas outlet 12 to a desired pressure value under the control of the pressure measuring device for the gas outlet and the external control device by combining the first regulating valve 20 and the second regulating valve 50, can adaptively adjust without manual adjustment, and can be applied to different types of gases to precisely control the gas flow because the driving current for switching the state of the second regulating valve 50 is correspondingly adjusted according to the desired pressure value of the gas at the gas outlet 12, so that the gas flow variation of the gas proportional valve of the present invention can be customized as a current-pressure characteristic curve, and the gas pressure of the gas outlet 12 can be controlled to the desired value by the pulse width modulation technology.
In one embodiment, as shown in fig. 2, the first valve body 30 includes an adjusting valve housing 31 and a cover plate 32, the adjusting valve housing 31 is installed in the main valve body 10, the cover plate 32 is installed outside the main valve body 10, and the adjusting valve housing 31 and the cover plate 32 enclose an inner cavity of the first valve body 30; a first air port 35 and a second air port 36 are provided on the regulator valve housing 31. By providing the first valve body 30 including the valve housing 31 and the cover plate 32, installation of the opening degree adjustment assembly 40 within the first valve body 30 is facilitated.
Specifically, the opening degree adjustment assembly 40 includes a diaphragm 41 that separates the first chamber 33 and the second chamber 34, a push plate 42 that connects the diaphragm 41, an opening degree adjustment lever 43 that connects the push plate 42, and an opening degree adjustment spring 46 that links the opening degree adjustment lever 43; the push plate 42 is located in the first cavity 33, and one end of the opening adjusting rod 43 is connected to the push plate 42, and the other end is disposed corresponding to the first air port 35, for changing the opening of the first air port 35. The opening degree adjusting assembly 40 of the structure is simple in structure and convenient to manufacture.
Preferably, the edge of the diaphragm 41 is sandwiched between the valve housing 31 and the cover plate 32, and the diaphragm 41 is connected to the first valve body 30. This manner of connection of the diaphragm 41 and the first valve body 30 facilitates replacement and installation of the diaphragm 41.
Further, the opening adjusting rod 43 includes an opening adjusting rod 44 with one end connected to the push plate 42 and an opening adjusting plug 45 disposed at the other end of the opening adjusting rod 44, where the opening adjusting plug 45 is disposed corresponding to the first air port 35; the opening adjusting plug 45 is used for being inserted into the first air port 35 at one end close to the first air port 35, and the size of the opening adjusting plug 45 at one end close to the first air port 35 is gradually reduced towards the direction from one end of the opening adjusting plug 45 away from the first air port 35 to the first air port 35, so that the purpose that the opening adjusting plug 45 can adjust the opening of the first air port 35 is achieved. By arranging the opening adjusting rod piece 43 to be composed of the opening adjusting rod 44 and the opening adjusting plug 45 which are detachably connected, when the opening adjusting plug 45 is seriously damaged and needs to be replaced, the opening adjusting plug 45 can be replaced without replacing the whole opening adjusting rod piece 43, and the maintenance cost is reduced.
In this embodiment, the end of the opening adjustment plug 45 near the first air port 35 is hemispherical, and the end of the opening adjustment plug 45 far from the first air port 35 is located in the air storage chamber 13. In other embodiments, the end of the opening adjustment plug 45 remote from the first port 35 may be located in the first chamber 33.
In one embodiment, the second regulating valve 50 is a three-way valve structure, as shown in fig. 3, the second regulating valve 50 includes a second valve body 60, a switching mechanism 70, and a regulating electromagnet 80 that can drive the switching mechanism 70 to move after being electrified; the second valve body 60 is installed in the main valve body 10, a switching air passage is arranged in the second valve body 60, and the switching air passage is provided with an air inlet passage 61, a working cavity 62 and an air outlet passage 63 which are sequentially communicated; the air inlet channel 61, the working cavity 62 and the air outlet channel 63 are respectively communicated with the air storage chamber 13, the second cavity 34 and the fuel gas outlet 12; the switching mechanism 70 is movably arranged in the switching air path; an adjusting electromagnet 80 is mounted on the main valve body 10 for driving the switching mechanism 70 to switch among three positions of a holding position, an inflating position and an exhausting position by a change in an input current; when the switching mechanism 70 moves to the inflation position, the second regulating valve 50 is in an inflation state, the air inlet channel 61 is communicated with the working cavity 62, the working cavity 62 is not communicated with the air outlet channel 63, and because the working cavity 62 is communicated with the second cavity 34, air flow in the air storage chamber 13 can enter the second cavity 34 through the communicated air inlet channel 61 and the working cavity 62, so that the opening regulating assembly 40 can act to increase the opening of the first air inlet 35; when the switching mechanism 70 moves to the holding position, the air inlet channel 61, the working chamber 62 and the air outlet channel 63 are not communicated, the second regulating valve 50 cannot send the air flow in the air storage chamber 13 into the second chamber 34, and cannot discharge the air in the second chamber 34 to the fuel gas outlet 12, and at this time, the second regulating valve 50 is in the holding state; when the switching mechanism 70 is switched to the exhaust position, the air inlet 61 is not communicated with the working chamber 62, the working chamber 62 is communicated with the air outlet 63, the air in the second chamber 34 can enter the gas outlet 12 through the working chamber 62 and the air outlet 63 which are communicated, at this time, the second regulating valve 50 is in an exhaust state, the air quantity in the second chamber 34 is reduced, and the opening regulating component 40 reduces the opening of the first gas port 35 along with the reduction action of the air quantity in the second chamber 34, so that the purpose of reducing the pressure of the gas outlet 12 is achieved.
Further, the switching air passage also comprises an upper valve cavity 64 communicated with the air inlet passage 61 and the working cavity 62 and a lower valve cavity 65 communicated with the working cavity 62 and the air outlet passage 63, and the switching mechanism 70 comprises an automatically-resettable piston assembly 71 and an automatically-resettable valve port assembly 76 which are movably arranged in the switching air passage; the valve port assembly 76 is disposed within the lower valve chamber 65 and divides the lower valve chamber 65 into a first chamber 66 communicating with the working chamber 62 and a second chamber 67 communicating with the outlet passage 63; the valve port assembly 76 is provided with a gas passageway 781 that communicates with the first chamber 66 and the second chamber 67; the piston assembly 71 includes a switching lever 72, and an upper valve core 73 and a lower valve core 74 which are provided on the switching lever 72 and each take the shape of a baffle plate; one end of the switching rod 72 is connected with the adjusting electromagnet 80, and the other end of the switching rod passes through the air outlet of the air inlet channel 61, the upper valve cavity 64 and the working cavity 62 and stretches into the lower valve cavity 65; the upper valve core 73 is movably arranged in the upper valve cavity 64, and the lower valve core 74 is movably arranged in the second chamber 67; the adjusting electromagnet 80 is used for driving the piston assembly 71 to move in the air path so as to switch the piston assembly 71 among three positions of a holding position, an inflating position and an exhausting position. In an initial state, the upper valve core 73 seals the air inlet of the working chamber 62, the upper valve cavity 64 is disconnected from the working chamber 62, the lower valve core 74 is arranged away from the valve port assembly 76, and the first chamber 66 and the second chamber 67 are communicated.
The switching mechanism 70 of this structure includes the following steps under the drive of the regulating electromagnet 80:
a. the adjusting electromagnet 80 is electrified firstly, so that the adjusting electromagnet 80 generates driving force of F on the piston assembly 71, the piston assembly 71 moves towards the direction of the lower valve cavity 65 to the upper valve cavity 64 under the driving of the driving force F1, the upper valve core 73 leaves the air inlet of the working cavity 62, the upper valve cavity 64 is communicated with the working cavity 62, the lower valve core 74 contacts the valve port assembly 76 to seal the air inlet of the air passage 781, the first chamber 66 and the second chamber 67 are disconnected, at the moment, the piston assembly 71 is switched to the charging position, when the air inlet channel 61 is communicated with the air source, air enters the working cavity 62 from the air inlet channel 61 through the upper valve cavity 64, and because the first chamber 66 and the second chamber 67 are disconnected, the air in the working cavity 62 enters the second cavity 34, but cannot flow into the air outlet channel 63 through the first chamber 66 and the second chamber 67, and as the air in the upper valve cavity 64 continuously passes through the working cavity 62 to enter the second cavity 34, the opening of the first air port 35 is increased, and accordingly the pressure at the gas outlet 12 is also increased; when the pressure measuring device measures that the pressure at the gas outlet 12 is equal to the required pressure value, the driving force generated by the regulating electromagnet 80 on the piston assembly 71 is increased from F1 to F2, the lower valve core 74 pushes the valve port assembly 76 to move towards the working cavity 62, the lower valve core 74 stops pushing the valve port assembly 76 to move until the upper valve core 73 seals the gas inlet of the gas inlet channel 61, at this time, the piston assembly 71 is switched to a retaining position, the gas inlet channel 61 is disconnected from the upper valve cavity 64, the first chamber 66 and the second chamber 67 are continuously disconnected, the gas in the upper valve cavity 64 cannot supply the gas to the working cavity 62 any more, the gas in the working cavity 62 cannot pass through the first chamber 66 and the second chamber 67 to flow to the gas outlet channel 63, and the pressures of the working cavity 62 and the gas in the first cavity 33 remain unchanged, so that the opening degree of the first gas inlet 35 remains unchanged, and the pressure at the gas outlet 12 remains unchanged.
c. When the pressure at the gas outlet 12 needs to be reduced to a specified pressure value, the power supply to the regulating electromagnet 80 is cut off, the force applied by the regulating electromagnet 80 to the piston assembly 71 is eliminated, the piston assembly 71 and the valve port assembly 76 are automatically reset, the upper valve core 73 again seals the gas inlet of the working cavity 62, the upper valve cavity 64 and the working cavity 62 are disconnected, simultaneously, the lower valve core 74 is far away from the valve port assembly 76, the first chamber 66 and the second chamber 67 are communicated, at the moment, the piston assembly 71 is in the exhaust position, the gas inlet channel 61 cannot supply gas to the working cavity 62, but the gas in the second chamber 34 can pass through the working cavity 62, the first chamber 66 and the second chamber 67 to enter the gas outlet channel 63, the gas in the second chamber 34 is reduced, the opening degree of the first gas port 35 is reduced, the pressure at the gas outlet 12 is reduced accordingly, when the pressure at the gas outlet 12 is measured by the pressure measuring device, the driving force generated by the regulating electromagnet 80 on the piston assembly 71 is increased to F, the piston assembly 71 is moved to the holding position, and the pressure at the gas outlet 12 is kept unchanged.
The piston assembly with the structure is matched with the valve port assembly 76 movably arranged in the lower valve cavity 65, so that the second regulating valve 50 with the three-position three-way valve structure can realize the switching of the piston assembly 71 in three positions of a holding position, an inflating position and an exhausting position only by one regulating electromagnet 80, two regulating electromagnets 80 are not needed, and the manufacturing cost is reduced.
In this embodiment, the upper spool 73 and the lower spool 74 are each provided separately from the switch lever 72, and are each detachably connected to the switch lever 72, so that replacement of the upper spool 73 and the lower spool 74 is facilitated. Preferably, the upper valve core 73 and the lower valve core 74 are both sleeved on the switching rod 72 and are both in threaded connection with the switching rod 72. By arranging the upper valve core 73 and the lower valve core 74 to be in threaded connection with the switching rod 72, the positions of the upper valve core 73 and the lower valve core 74 on the switching rod 72 can be adjusted according to actual needs, so that the upper valve core 73 and the lower valve core 74 can be accurately moved to specified positions. In other embodiments, the upper valve element 73 and the lower valve element 74 may be provided integrally with the switching lever 72.
In other embodiments, an upper valve element elastic layer may be disposed on a side of the upper valve element 73 near the working chamber 62 and a side of the upper valve element 73 near the air outlet of the air intake duct 61, so that the upper valve element 73 can tightly seal the air outlet of the air intake duct 61 or the air inlet of the working chamber 62. A lower valve core elastic layer may be disposed on a side of the lower valve core 74 adjacent to the valve port assembly 76 so that the lower valve core 74 can tightly seal the air outlet of the air passage 781 of the valve port assembly 76. The upper valve core elastic layer and the lower valve core elastic layer are preferably made of silica gel materials with stable performance and difficult corrosion.
Optionally, the piston assembly 71 further comprises a push rod spring 75 linking the valve rod member consisting of the switching lever 72, the upper valve core 73 and the lower valve core 74 for driving the piston assembly 71 to automatically reset. In this embodiment, the push rod spring 75 is sleeved on the switching rod 72, the push rod spring 75 is located at one side of the upper valve core 73 away from the lower valve core 74, and two ends of the push rod spring 75 respectively support the upper valve core 73 and the second valve body 60.
Alternatively, the regulating electromagnet 80 includes a regulating valve coil bracket 81 mounted on the second valve body 60, a regulating valve fixed iron core 82 mounted in the regulating valve bracket, a regulating valve coil bracket 81 sleeved on the regulating valve fixed iron core 82, a regulating valve coil 83 sleeved on the regulating valve coil bracket 81, and a regulating valve movable iron core 84 slidably disposed in the regulating valve fixed iron core 82; the regulator valve plunger 84 is connected to the switch lever 72 of the piston assembly 71. When the regulator valve coil 83 is energized, the regulator valve stator core 82 generates a driving force that drives the piston assembly 71 to move, to the regulator valve plunger 84.
Optionally, the valve port assembly 76 includes a stopper 78, an annular barrier film 77, and a second switching spring 79 that links the stopper 78, a gas passage 781 is provided on the stopper 78, the barrier film 77 surrounds the stopper 78 and connects the stopper 78 and the second valve body 60 to enable the stopper 78 to move relative to the valve body such that gas in the first chamber 66 does not flow from between the stopper 78 and an inner wall of the second valve body 60 into the second chamber 67; the second switching spring 79 is used for driving the stop block 78 to automatically reset. Preferably, the second switching spring 79 is sleeved on the switching rod 72 and is located at one side of the stop block 78 close to the working chamber 62, and two ends of the second switching spring 79 respectively abut against the stop block 78 and the second valve body 60.
In one embodiment, as shown in fig. 1, the fuel gas proportional valve further includes a stop valve 90 mounted on the main valve body 10, where the stop valve 90 is disposed corresponding to the air inlet of the air storage chamber 13, and is used for opening and closing the air inlet of the air storage chamber 13. The shut-off valve 90 can rapidly shut off the gas port channel from supplying gas flow to the gas reservoir 13, so that the gas outlet 12 can be quickly freed from gas.
As shown in fig. 4, the shutoff valve 90 includes a shutoff valve coil holder 91 attached to the main valve body 10, a shutoff valve stator core 92 attached to the shutoff valve coil holder 91, a shutoff valve coil 93 fitted over the shutoff valve coil 93, a shutoff valve plunger 94 slidably fitted to the shutoff valve stator core 92, a shutoff valve stem 93 and a shutoff valve plug 94 fitted to the main valve body 10, and a shutoff valve spring 95 interlocking with the shutoff valve plug 94; one end of the stop valve rod 93 is connected with the stop valve movable iron core 94, the other end of the stop valve rod is connected with the stop valve plug 94, and the stop valve plug 94 is arranged corresponding to the air inlet of the air storage chamber 13; the stop valve spring 95 is used for driving the stop valve plug 94 to reset automatically. When the stop valve coil 93 is not electrified, the stop valve plug 94 tightly seals the air inlet of the air storage chamber 13 under the action of the restoring force of the stop valve spring 95, and the gas supply of the gas inlet 11 to the air storage chamber 13 is cut off; when the stop valve coil 93 is energized, the stop valve iron core 92 generates an adsorption force to the stop valve iron core 94, and drives the stop valve plug 94 to be far away from the air inlet of the air storage chamber 13, so that the air inlet of the air storage chamber 13 is opened, the gas inlet 11 is communicated with the air storage chamber 13, and gas can enter the air storage chamber 13.
Optionally, a stop valve spring 95 is sleeved on the stop valve rod 93, and two ends of the stop valve spring 95 respectively support the stop valve plug 94 and the main valve body 10.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A gas proportioning valve, comprising:
the gas storage device comprises a main valve body (10), wherein a gas inlet (11), a gas outlet (12) and a gas storage chamber (13) communicated with the gas inlet (11) are arranged in the main valve body (10);
the first regulating valve (20) is arranged in the air storage chamber (13), the first regulating valve (20) comprises a first valve body (30) and an opening regulating assembly (40), and the inner cavity of the first valve body (30) is divided into a first cavity (33) and a second cavity (34) by the opening regulating assembly (40); the first cavity (33) is communicated with the fuel gas outlet (12) and is communicated with the gas storage chamber (13) through a first gas port (35) arranged on the first valve body (30); the opening adjusting component (40) adjusts the opening of the first air port (35) through the air quantity entering the second cavity (34); the method comprises the steps of,
the second regulating valve (50) is arranged on the main valve body (10) and is used for switching among three states of air supply, air exhaust and maintenance through the change of input current, and when the second regulating valve (50) is in an air supply state, the second regulating valve (50) sends the air in the air storage chamber (13) into the second cavity (34) to drive the opening regulating assembly (40) to increase the opening of the first air port (35); when the second regulating valve (50) is in an exhaust state, the second regulating valve (50) sends the gas in the second cavity (34) to the gas outlet (12) to drive the opening regulating assembly (40) to reduce the opening of the first gas port (35); when the second regulating valve (50) is in a holding state, the second cavity (34) is neither in air intake nor in air exhaust, and the opening degree of the first air port (35) is kept unchanged;
the second regulating valve (50) comprises a second valve body (60) and a switching mechanism (70); the second valve body (60) is arranged in the main valve body (10), a switching gas circuit is arranged in the second valve body (60), and the switching gas circuit is provided with a gas inlet channel (61), a working cavity (62) and a gas outlet channel (63) which are communicated in sequence; the air inlet channel (61), the working cavity (62) and the air outlet channel (63) are respectively communicated with the air storage chamber (13), the second cavity (34) and the fuel gas outlet (12); the switching mechanism (70) is movably arranged in the switching air path; the switching gas circuit further comprises an upper valve cavity (64) communicated with the gas inlet channel (61) and the working cavity (62) and a lower valve cavity (65) communicated with the working cavity (62) and the gas outlet channel (63); the switching mechanism (70) comprises an automatically resettable piston assembly (71) and an automatically resettable valve port assembly (76) which are movably arranged in the switching gas path; the valve port assembly (76) is arranged in the lower valve cavity (65) and divides the lower valve cavity (65) into a first chamber (66) communicated with the working cavity (62) and a second chamber (67) communicated with the air outlet channel (63); the valve port assembly (76) is provided with a gas passage (781) which is communicated with the first chamber (66) and the second chamber (67); the piston assembly (71) comprises a switching rod (72), and an upper valve core (73) and a lower valve core (74) which are arranged on the switching rod (72) and are all in a baffle shape; the upper spool (73) is located within the upper valve chamber (64) and the lower spool (74) is located within the second chamber (67).
2. The gas proportional valve as claimed in claim 1, wherein the first valve body (30) comprises an adjusting valve housing (31) and a cover plate (32), the adjusting valve housing (31) is installed in the main valve body (10), the cover plate (32) is detachably installed outside the main valve body (10), and the adjusting valve housing (31) and the cover plate (32) enclose an inner cavity of the first valve body (30); the first air port (35) and the second air port (36) are arranged on the adjusting valve casing (31).
3. The gas proportional valve as claimed in claim 2, wherein the opening degree adjustment assembly (40) includes a diaphragm (41) that separates the first chamber (33) and the second chamber (34), a push plate (42) that connects the diaphragm (41), an opening degree adjustment lever (43) that connects the push plate (42), and an opening degree adjustment spring (46) that links the opening degree adjustment lever (43); the push plate (42) is positioned in the first cavity (33), one end of the opening degree adjusting rod piece (43) is connected with the push plate (42), and the other end of the opening degree adjusting rod piece is arranged corresponding to the first air port (35) and used for changing the opening degree of the first air port (35); the opening adjusting spring (46) is used for driving the opening adjusting rod piece (43) to automatically reset and seal the first air port (35).
4. A gas proportional valve as claimed in claim 3, characterized in that the edge of the diaphragm (41) is clamped between the regulating valve housing (31) and the cover plate (32).
5. A gas proportional valve as claimed in claim 3, wherein the opening degree adjusting rod (43) comprises an opening degree adjusting rod (44) with one end connected with the push plate (42) and an opening degree adjusting plug (45) arranged at the other end of the opening degree adjusting rod (44), and the opening degree adjusting plug (45) is arranged corresponding to the first air port (35) and is detachably connected with the opening degree adjusting rod (44); the opening adjusting plug (45) is used for being inserted into the first air port (35) at one end close to the first air port (35), and the size of one end of the opening adjusting plug (45) close to the first air port (35) gradually decreases towards the direction from one end of the opening adjusting plug (45) away from the first air port (35) to the first air port (35).
6. The fuel gas proportional valve as claimed in claim 5, wherein an end of the opening degree adjusting plug (45) close to the first air port (35) is hemispherical, and an end of the opening degree adjusting plug (45) away from the first air port (35) is located in the air storage chamber (13).
7. The fuel gas proportional valve according to claim 1, wherein the second regulating valve (50) is of a three-way valve structure, and the second regulating valve (50) comprises a regulating electromagnet (80) which can generate suction force to the switching mechanism (70) after being electrified; the regulating electromagnet is arranged on the main valve body (10) and is used for driving the switching mechanism (70) to switch among three positions of a holding position, an inflating position and an exhausting position by changing the driving force of the switching mechanism (70) through the change of input current; when the switching mechanism (70) is switched to the charging position, the air inlet channel (61) is communicated with the working cavity (62), and the working cavity (62) is not communicated with the air outlet channel (63); when the switching mechanism (70) is switched to an exhaust position, the air inlet channel (61) is not communicated with the working cavity (62), and the working cavity (62) is communicated with the air outlet channel (63); when the switching mechanism (70) is switched to the holding position, the air inlet channel (61), the working cavity (62) and the air outlet channel (63) are not communicated.
8. The gas proportional valve of claim 1, wherein the valve port assembly (76) comprises a stop (78), an annular barrier (77), and a pusher spring (79) that links the stop (78), the gas passageway (781) is disposed on the stop (78), the barrier (77) surrounds the stop (78) and connects the stop (78) and the second valve body (60); the pushing block spring (79) is used for driving the stop block (78) to automatically reset.
9. The gas proportional valve as claimed in claim 1, wherein the upper valve spool (73) and the lower valve spool (74) are each provided separately from the switching lever (72) and are each detachably connected to the switching lever (72).
10. The gas proportional valve according to claim 1, further comprising a shut-off valve (90) mounted on the main valve body (10), the shut-off valve (90) being arranged in correspondence with the gas inlet of the gas storage chamber (13) for opening and closing the gas inlet of the gas storage chamber (13).
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| CN201910463683.7A CN110145623B (en) | 2019-05-30 | 2019-05-30 | Gas Proportional Valve |
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| CN201910463683.7A CN110145623B (en) | 2019-05-30 | 2019-05-30 | Gas Proportional Valve |
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| CN110145623B true CN110145623B (en) | 2024-04-09 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN111255926B (en) * | 2020-01-19 | 2021-04-09 | 绍兴艾柯电气有限公司 | Gas proportional valve |
| 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 |
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