CN113187902A - Gas proportional valve and gas device - Google Patents

Abstract

The invention relates to a gas proportional valve and a combustion device, wherein the gas proportional valve comprises: the main part, first ooff valve and second ooff valve. The main body is provided with a gas channel. Wherein one end of gas passageway is the gas import, the gas import is used for being linked together with the air feed air supply, burner opens when the in-process needs to use the spark ignition function, control first ooff valve and second ooff valve and all open, the gas in the air feed air supply just can enter into the gas export through the ignition passageway, offer the combustor by the gas export, thereby just can carry out the spark ignition of spark, owing to be provided with first ooff valve and second ooff valve on the ignition passageway, guarantee the security of ignition passageway through the twice switch promptly. The starting process of the combustion device does not need to use a small fire ignition function, namely when the fuel gas discharged from the fuel gas channel is directly adopted for ignition, the first switch valve and the second switch valve are controlled to be closed.

Description

Gas proportional valve and gas device

Technical Field

The invention relates to the technical field of gas devices, in particular to a gas proportional valve and a gas device.

Background

With the improvement of living standards and the rapid development and progress of science and technology, gas devices are beginning to appear in the middle of the life of people in a large range. Conventional gas-fired devices include cookers, gas-fired water heating equipment or boilers, etc., and will not be described herein. The gas proportional valve, as a relatively important component of a gas device, is generally divided into two types, i.e., a type with an ignition function and a type without the ignition function. For the gas proportional valve with ignition function, only one sealing valve is arranged on the ignition branch, which does not meet the requirement of any gas passage leading to the combustor in the national standard GB 6932-2015 that at least two mutually independent closeable valves are arranged, and the safety and reliability are poor.

Disclosure of Invention

The first technical problem solved by the invention is to provide a gas proportional valve which can effectively improve the safety.

A second technical problem to be solved by the present invention is to provide a gas combustion apparatus which can effectively improve safety.

The first technical problem is solved by the following technical scheme:

a gas proportioning valve, comprising: the ignition device comprises a main body, a gas channel is arranged on the main body, one end of the gas channel is a gas inlet, the gas inlet is communicated with a gas supply source, the other end of the gas channel is a gas outlet, the gas outlet is communicated with a burner, an ignition channel is further arranged on the main body, one end of the ignition channel is communicated with the gas inlet, and the other end of the ignition channel is communicated with the gas outlet; the ignition device comprises a first switch valve and a second switch valve, wherein the first switch valve and the second switch valve are sequentially arranged on the ignition channel.

Compared with the background art, the fuel gas proportional valve has the following beneficial effects: foretell gas proportional valve, when burner open in-process need use the spark ignition function, control first ooff valve and second ooff valve and all open, the gas in the air feed source just can enter into the gas export through the ignition passageway, offers the combustor by the gas export to just can carry out the spark ignition, owing to be provided with first ooff valve and second ooff valve on the ignition passageway, guarantee the security of ignition passageway through the twice switch promptly. The starting process of the combustion device does not need to use a small fire ignition function, namely when the fuel gas discharged from the fuel gas channel is directly adopted for ignition, the first switch valve and the second switch valve are controlled to be closed.

In one embodiment, the gas channel comprises a first channel, a second channel and a third channel which are arranged in sequence; the fuel gas proportional valve also comprises a first stop valve arranged in the first channel and used for communicating or mutually cutting off the first ends of the first channel and the second channel, and a second stop valve arranged in the third channel and used for communicating or mutually cutting off the second ends of the third channel and the second channel;

the first stop valve comprises a first diaphragm, a first elastic component and a first blocking head, the first diaphragm is connected with the first blocking head through the first elastic component, the first diaphragm is connected with the wall of the first channel to divide the inner space of the first channel into a closed first back pressure chamber and a first positive pressure chamber isolated from the first back pressure chamber, the first positive pressure chamber is communicated with the gas inlet, and the first blocking head is used for blocking or opening a first port part of the second channel so as to enable the first positive pressure chamber to be communicated with or blocked from a first end of the second channel;

the second stop valve comprises a second diaphragm, a second elastic component and a second blocking head, the second diaphragm is connected with the second blocking head through the second elastic component, the second diaphragm is connected with the wall of the second channel to divide the inner space of the third channel into a closed second back pressure chamber and a second positive pressure chamber isolated from the second back pressure chamber, the second positive pressure chamber is communicated with the gas outlet, and the second blocking head is used for blocking or opening a second port part of the second channel to enable the second positive pressure chamber to be communicated with or isolated from a second end of the second channel.

In one embodiment, the main body is provided with a first concave portion, the first switch valve comprises a first valve seat detachably mounted on the main body, a first coil mounted on the first valve seat, a first magnet sleeved in the first coil, a first elastic seat arranged in the first concave portion, and a first sealing plate mounted on the first elastic seat; the first valve seat and the first concave part are enclosed to form a closed first chamber, and the first chamber is communicated with a first back pressure chamber through a first connecting pipeline;

the ignition channel comprises a first air inlet flow channel and a first air outlet flow channel which are arranged on the first valve seat at intervals, the first air inlet flow channel and the first air outlet flow channel are communicated with the first cavity, the first air inlet flow channel and the first air outlet flow channel are respectively positioned at two sides of the first magnet, and the air inlet end of the first air inlet flow channel is communicated with the gas inlet; the first sealing plate is used for sealing or opening the air outlet end of the first air inlet flow channel and is used for opening or sealing the air inlet end of the first air outlet flow channel;

when the first coil is electrified, the first magnet drives the first sealing plate to act so that the gas inlet end of the first gas outlet flow channel is opened, and the gas outlet end of the first gas inlet flow channel is closed; when the first coil is powered off, the first sealing plate acts under the action of the resetting force of the first elastic seat, so that the first sealing plate opens the air outlet end of the first air inlet flow channel and seals the air inlet end of the first air outlet flow channel.

In one embodiment, the main body is further provided with a second concave portion, the second switch valve comprises a second valve seat detachably mounted on the main body, a second coil mounted on the second valve seat, a second magnet sleeved in the second coil, a second elastic seat arranged in the second concave portion, and a second sealing plate mounted on the second elastic seat; the second valve seat and the second concave part are enclosed to form a closed second chamber;

the ignition channel comprises a second air inlet flow channel and a second air outlet flow channel which are arranged on the second valve seat at intervals, the second air inlet flow channel and the second air outlet flow channel are both communicated with the second chamber, and the second air inlet flow channel and the second air outlet flow channel are respectively positioned on two sides of the second magnet; the second sealing plate is used for opening or sealing the gas inlet end of the second gas outlet flow channel, the gas outlet end of the second gas outlet flow channel is communicated with the gas outlet through a second connecting pipeline, and the first gas outlet flow channel is communicated with the second cavity through the second gas inlet flow channel;

when the second coil is electrified, the second magnet drives the second sealing plate to act so as to open the air inlet end of the second air outlet flow channel; when the second coil is powered off, the second sealing plate acts under the action of the resetting force of the second elastic seat, so that the second sealing plate seals the air inlet end of the second air outlet flow passage.

In one embodiment, the wall of the first channel is provided with a first mounting opening, a first sealing cover is detachably mounted at the first mounting opening, the outer edge of the first diaphragm is arranged at the first mounting opening, and the first sealing cover and the first diaphragm form a first backpressure chamber in an enclosed mode;

the wall of the third channel is provided with a second mounting hole, a second sealing cover is detachably arranged at the second mounting hole, the outer edge of the second diaphragm is arranged at the second mounting hole, and the second sealing cover and the second diaphragm enclose the second back pressure chamber.

In one embodiment, the first shut-off valve further comprises a first rigid plate, and the first diaphragm is attached to the first rigid plate; the second stop valve further comprises a second hard plate, and the second diaphragm is attached to the second hard plate.

In one embodiment, the first elastic element includes a first base mounted on a wall of the first channel, a first push rod movably mounted on the first base, and a first spring sleeved on the first push rod, two ends of the first spring abut against between the first base and the first blocking head, and the first blocking head and the first diaphragm are respectively connected to two ends of the first push rod; the second elastic component comprises a second base arranged on the wall of the third channel, a second push rod movably arranged on the second base and a second spring sleeved on the second push rod, two ends of the second spring are abutted between the second base and the second blocking head, and the second blocking head and the second diaphragm are respectively connected with two ends of the second push rod.

In one embodiment, the gas proportional valve further comprises a proportional regulating valve arranged on the main body and a third on-off valve arranged on the proportional regulating valve; the ratio regulating valve comprises a rack, a third coil fixedly arranged on the rack and a movable shaft movably arranged on the rack, and the third coil is sleeved outside the movable shaft;

the third switch valve comprises a shell provided with a butt joint, a partition plate arranged in the shell, a valve shaft movably arranged on the partition plate in a penetrating mode, a third diaphragm fixedly arranged on the valve shaft and a sealing seat fixedly arranged at the end portion of the valve shaft; the shell is arranged on the machine frame, and the third diaphragm seals the butt joint port; the partition plate is provided with a shaft hole, the valve shaft is movably arranged in the shaft hole, the outer diameter of the valve shaft is smaller than the diameter of the shaft hole, and an airflow gap is formed between the outer wall of the valve shaft and the wall of the shaft hole; the valve shaft and the movable shaft are coaxially arranged, the movable shaft can drive the valve shaft to move when moving, and the valve shaft can drive the sealing seat to seal or open the airflow gap;

the partition plate divides the inner space of the shell into a third chamber and a fourth chamber, and the sealing seat is positioned in the third chamber; the shell is also provided with a first air hole communicated with the third chamber and a second air hole communicated with the fourth chamber, the wall of the second channel is provided with a first butt joint hole in butt joint communication with the first air hole, and the main body is also provided with a second butt joint hole in communication with the second air hole and the fuel gas outlet; and the partition plate is also provided with a third air hole communicated with the airflow gap, and the third air hole is communicated with the second back pressure chamber through a third connecting pipeline.

In one embodiment, the proportional regulating valve further comprises a third spring, and the end of the moving shaft far away from the valve shaft is connected with the frame through the third spring; the third switch valve also comprises a fourth spring, and the sealing seat is abutted against the inner wall of the shell through the fourth spring; the first flange is arranged on one side surface of the partition plate in the circumferential direction around the shaft hole and is in interference fit with the sealing seat; and a second flange is arranged on the other side surface of the partition plate in a circumferential direction around the shaft hole, and the second flange is in interference fit with the third diaphragm.

The second technical problem is solved by the following technical solutions:

a gas device comprises the gas proportional valve.

Compared with the background art, the gas device of the invention has the following beneficial effects: above-mentioned gas device, when burner opened the in-process and need use the spark ignition function, control first ooff valve and second ooff valve and all open, the gas in the air feed source just can enter into the gas export through the ignition passageway, offers the combustor by the gas export to just can carry out the spark ignition, owing to be provided with first ooff valve and second ooff valve on the ignition passageway, guarantee the security of ignition passageway through the twice switch promptly. The starting process of the combustion device does not need to use a small fire ignition function, namely when the fuel gas discharged from the fuel gas channel is directly adopted for ignition, the first switch valve and the second switch valve are controlled to be closed.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a gas proportional valve according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the gas proportional valve in an operating state when the first stop valve and the second stop valve are both closed and the first switch valve and the second switch valve are both de-energized according to an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the gas proportional valve in an operating state when the first stop valve and the second stop valve are both closed, the first switch valve is frequently turned on and off, and the second switch valve is turned on and off according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of the gas proportional valve of an embodiment of the present invention in an operating state when the first stop valve is open, the second stop valve is closed, the first switch valve is energized, the second switch valve is energized, and the proportional regulating valve is closed;

FIG. 5 is a cross-sectional view of the gas proportional valve of an embodiment of the present invention in an operating state when the first stop valve is open, the second stop valve is closed, the first on-off valve is energized, the second on-off valve is energized, and the proportional regulating valve is energized;

FIG. 6 is a cross-sectional view of the gas proportional valve of an embodiment of the present invention in an operating state when the first stop valve is open, the second stop valve is open, the first on-off valve is energized, the second on-off valve is energized, and the proportional regulating valve is energized;

fig. 7 is a schematic structural diagram of a proportional regulating valve and a third switch in the gas proportional valve according to an embodiment of the present invention.

Reference numerals:

10. a main body; 11. a gas channel; 111. a gas inlet; 112. a gas outlet; 113. a first channel; 1131. a first back pressure chamber; 1132. a first plenum; 1133. a first cover; 114. a second channel; 1141. a first end of a second channel; 1142. a second end of the second channel; 11434. a first mating hole; 115. a third channel; 1151. a second backpressure chamber; 1152. a second plenum; 1153. a second cover; 12. an ignition channel; 121. a first intake runner; 1211. an air outlet end of the first air inlet flow channel; 122. a first air outlet flow channel; 1221. the gas inlet end of the first gas outlet flow channel; 123. a second intake runner; 124. a second air outlet flow channel; 1241. the gas inlet end of the second gas outlet flow channel; 13. a first chamber; 14. a second chamber; 15. a second docking hole; 20. a first on-off valve; 21. a first valve seat; 22. a first coil; 23. a first magnet; 24. a first elastic seat; 25. a first sealing plate; 30. a second on-off valve; 31. a second valve seat; 32. a second coil; 33. a second magnet; 34. a second elastic seat; 35. a second sealing plate; 40. a first shut-off valve; 41. a first diaphragm; 42. a first plugging head; 43. a first base; 44. a first push rod; 45. a first spring; 50. a second stop valve; 51. a second diaphragm; 52. a second plugging head; 53. a second base; 54. a second push rod; 55. a second spring; 61. a first connecting pipe; 62. a second connecting pipe; 63. a third connecting pipe; 70. a proportional regulating valve; 71. a frame; 72. a third coil; 73. a moving shaft; 74. a third spring; 80. a third on-off valve; 81. a housing; 811. a third chamber; 812. a fourth chamber; 813. a first air hole; 814. a second air hole; 82. a partition plate; 821. a shaft hole; 822. a third air hole; 823. a first flange; 824. a second flange; 83. a valve shaft; 84. a third diaphragm; 85. a sealing seat; 86. an air flow gap; 87. and a fourth spring.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 and 2, fig. 1 is a schematic structural diagram illustrating a gas proportional valve according to an embodiment of the present invention, and fig. 2 is a cross-sectional view illustrating an operating state of the gas proportional valve according to the embodiment of the present invention when both the first stop valve 40 and the second stop valve 50 are closed and both the first switch valve 20 and the second switch valve 30 are de-energized. An embodiment of the present invention provides a gas proportional valve, which includes: a main body 10, a first switching valve 20, and a second switching valve 30.

The main body 10 is provided with a gas passage 11. One end of the gas channel 11 is a gas inlet 111, the gas inlet 111 is used for being communicated with a gas supply source, the other end of the gas channel 11 is a gas outlet 112, and the gas outlet 112 is used for being communicated with a burner. The main body 10 is also provided with an ignition passage 12. One end of the ignition passage 12 communicates with the gas inlet 111, and the other end of the ignition passage 12 communicates with the gas outlet 112. The first on-off valve 20 and the second on-off valve 30 are disposed on the ignition passage 12 in this order.

According to the gas proportional valve, when a small-fire ignition function is needed in the starting process of the combustion device, the first switch valve 20 and the second switch valve 30 are controlled to be opened, gas in a gas supply source can enter the gas outlet 112 through the ignition channel 12 and is provided for a combustor through the gas outlet 112, so that small-fire ignition can be performed, and the safety of the ignition channel 12 is ensured through two switches due to the fact that the first switch valve 20 and the second switch valve 30 are arranged on the ignition channel 12. When the combustion device is started, the function of small fire ignition is not needed, that is, the gas discharged from the gas channel 11 is directly used for ignition, and the first switch valve 20 and the second switch valve 30 are controlled to be closed.

Referring to fig. 2 and 3, fig. 3 is a cross-sectional view illustrating an operation state of the gas proportional valve according to an embodiment of the present invention when the first cut-off valve 40 and the second cut-off valve 50 are both closed, the first switch valve 20 is frequently turned on and off, and the second switch valve 30 is turned on. Further, the gas channel 11 includes a first channel 113, a second channel 114 and a third channel 115 which are sequentially arranged. The gas proportional valve further includes a first cut-off valve 40 disposed in the first passage 113 for communicating or cutting off the first passage 113 with or from the first end 1141 of the second passage 114, and a second cut-off valve 50 disposed in the third passage 115 for communicating or cutting off the third passage 115 with or from the second end 1142 of the second passage 114.

Referring to fig. 2 and 3, in particular, the first stop valve 40 includes a first diaphragm 41, a first elastic element and a first blocking head 42. The first diaphragm 41 is connected to the first blocking head 42 by a first elastic member, and the first diaphragm 41 is connected to the wall of the first passage 113 to divide the inner space of the first passage 113 into a closed first back pressure chamber 1131 and a first positive pressure chamber 1132 isolated from the first back pressure chamber 1131. The first plenum 1132 is in communication with the combustion gas inlet 111. The first blocking head 42 is used for blocking or opening the opening of the first end 1141 of the second channel 114 so as to enable the first positive pressure chamber 1132 and the first end 1141 of the second channel 114 to be communicated or separated from each other.

Referring to fig. 2 and 3, in particular, the second stop valve 50 includes a second diaphragm 51, a second elastic element and a second blocking head 52. The second diaphragm 51 is connected to the second blocking head 52 through a second elastic member, and the second diaphragm 51 is connected to the wall of the second passage 114 to divide the inner space of the third passage 115 into a closed second back pressure chamber 1151 and a second positive pressure chamber 1152 isolated from the second back pressure chamber 1151. The second plenum 1152 communicates with the gas outlet 112. The second blocking head 52 is used for blocking or unblocking the opening of the second end 1142 of the second channel 114 so that the second positive pressure chamber 1152 is communicated with or isolated from the second end 1142 of the second channel 114.

Referring to fig. 4 to 6, fig. 4 is a sectional view showing an operating state of the gas proportional valve according to the embodiment of the present invention when the first cut-off valve 40 is opened, the second cut-off valve 50 is closed, the first on-off valve 20 is energized, the second on-off valve 30 is energized, and the proportional control valve 70 is closed, fig. 5 is a sectional view showing an operating state of the gas proportional valve according to the embodiment of the present invention when the first cut-off valve 40 is opened, the second cut-off valve 50 is closed, the first on-off valve 20 is energized, the second on-off valve 30 is energized, and the proportional control valve 70 is energized, and fig. 6 is a sectional view showing an operating state of the gas proportional valve according to the embodiment of the present invention when the first cut-off valve 40 is opened, the second cut-off valve 50 is opened, the first on-off valve 20 is energized, the second on-off valve 30 is energized, and the proportional control valve 70 is energized. On the circulation route of the gas channel 11, the first end 1141 of the second channel 114 can be closed by the first stop valve 40, and the second end 1142 of the second channel 114 can be synchronously closed by the second stop valve 50, so that the gas channel 11 is also provided with two switches, the national standard requirement is met, and the safety is high. Specifically, when the air pressure in the first positive pressure chamber 1132 is greater than the first back pressure chamber 1131, the first diaphragm 41 drives the first elastic component to move, the first elastic component drives the first blocking head 42 to open the first end 1141 of the second channel 114, at this time, the first positive pressure chamber 1132 is communicated with the first end 1141 of the second channel 114, and then the gas in the first positive pressure chamber 1132 can enter the second channel 114; on the contrary, when the air pressure in the first positive pressure chamber 1132 is not greater than the first back pressure chamber 1131, the first elastic component resets and moves to drive the first blocking head 42 to close the first end 1141 of the second channel 114, at this time, the first positive pressure chamber 1132 is separated from the first end 1141 of the second channel 114, that is, the gas in the first positive pressure chamber 1132 cannot enter the second channel 114.

Similarly, when the air pressure in the second back-pressure chamber 1151 is greater than the second positive-pressure chamber 1152, the second diaphragm 51 drives the second elastic element to move, the second elastic element drives the second blocking head 52 to open the second end 1142 of the second channel 114, at this time, the second positive-pressure chamber 1152 is communicated with the second end 1142 of the second channel 114, and the gas at the second end 1142 of the second channel 114 can enter the gas outlet 112 from the second positive-pressure chamber 1152; on the contrary, when the air pressure in the second back pressure chamber 1151 is not greater than the second positive pressure chamber 1152, the second elastic element resets and moves to drive the second blocking head 52 to close the second end 1142 of the second channel 114, at this time, the second positive pressure chamber 1152 is separated from the second end 1142 of the second channel 114, that is, the gas in the second channel 114 cannot enter the gas outlet 112 from the second positive pressure chamber 1152.

Referring to fig. 2 and 3, in one embodiment, the main body 10 is provided with a first recess, and the first switching valve 20 includes a first valve seat 21 detachably mounted on the main body 10, a first coil 22 mounted on the first valve seat 21, a first magnet 23 sleeved in the first coil 22, a first elastic seat 24 disposed in the first recess, and a first sealing plate 25 mounted on the first elastic seat 24. The first valve seat 21 and the first recess enclose a closed first chamber 13, and the first chamber 13 communicates with the first back pressure chamber 1131 through a first connecting duct 61.

Referring to fig. 2 and 3, the ignition channel 12 includes a first inlet flow channel 121 and a first outlet flow channel 122 that are disposed on the first valve seat 21 at intervals, the first inlet flow channel 121 and the first outlet flow channel 122 are both communicated with the first chamber 13, the first inlet flow channel 121 and the first outlet flow channel 122 are respectively located at two sides of the first magnet 23, and an inlet end of the first inlet flow channel 121 is communicated with the gas inlet 111. The first sealing plate 25 is used to seal or open the gas outlet 1211 of the first gas inlet flow passage 121 and to seal or open the gas inlet 1221 of the first gas outlet flow passage 122. When the first coil 22 is energized, the first magnet 23 drives the first sealing plate 25 to act, so that the gas inlet end 1221 of the first gas outlet flow channel 122 is opened, and the gas outlet end 1211 of the first gas inlet flow channel 121 is closed; when the first coil 22 is powered off, the first sealing plate 25 is acted by the restoring force of the first elastic seat 24, so that the first sealing plate 25 opens the gas outlet 1211 of the first gas inlet flow channel 121 and seals the gas inlet 1221 of the first gas outlet flow channel 122.

Thus, when the combustion apparatus needs to use the pilot fire ignition function in the starting process, the second switch valve 30 is opened, and for example, the first coil 22 is powered on and off according to the preset frequency, at this time, the gas at the gas inlet 111 enters the first chamber 13 according to the preset frequency, and flows backwards to the gas outlet 112 through the first gas outlet flow channel 122 according to the preset frequency, so that pilot fire ignition can be performed, meanwhile, the gas in the first chamber 13 can also enter the first back pressure chamber 1131 through the first connecting pipe 61, so that the pressure in the first back pressure chamber 1131 is equal to the pressure in the first positive pressure chamber 1132, and the first end 1141 of the second channel 114 is closed by the first blocking head 42 under the acting force of the first elastic component. When the combustion apparatus does not need to use the small fire ignition function, the first coil 22 is energized, and the second on-off valve 30 is opened, at this time, the first magnet 23 drives the first sealing plate 25 to move, so that the gas inlet end 1221 of the first gas outlet flow channel 122 is opened, the gas outlet end 1211 of the first gas inlet flow channel 121 is closed, the gas in the gas inlet 111 cannot enter the first chamber 13 through the first gas inlet flow channel 121, the gas in the first back pressure chamber 1131 can enter the first chamber 13 through the first connecting pipe, the gas in the first chamber 13 continues to flow to the gas outlet 112 through the first gas outlet flow channel 122, since the gas in the first back pressure chamber 1131 is discharged outwards, the pressure in the first back pressure chamber 1131 is smaller than the pressure in the first positive pressure chamber 1132, so that the first diaphragm 41 drives the first elastic component to move, the first elastic component drives the first sealing head 42 to open the first end 1141 of the second channel 114, at this time, the first positive pressure chamber 1132 is communicated with the first end 1141 of the second passage 114, and the gas in the first positive pressure chamber 1132 can enter the second passage 114.

Specifically, a first permanent magnet is mounted on the middle portion of the first sealing plate 25 at a position corresponding to the first magnet 23. When the first coil 22 is energized, the first magnet 23 is attracted to and acts on the first permanent magnet, so that the first permanent magnet deflects, the first elastic seat 24 is compressed in the deflection process of the first permanent magnet, and the first sealing plate 25 is driven to act at the same time, so that the gas inlet end 1221 of the first gas outlet flow passage 122 is opened, and the gas outlet end 1211 of the first gas inlet flow passage 121 is closed; when the first coil 22 is powered off, the first elastic seat 24 resets and synchronously drives the first permanent magnet to rotate in the opposite direction, and the first permanent magnet drives the first sealing plate 25 to move in the opposite direction so as to close the gas inlet end 1221 of the first gas outlet flow passage 122 and open the gas outlet end 1211 of the first gas inlet flow passage 121.

In one embodiment, the main body 10 is further provided with a second recess, and the second switch valve 30 includes a second valve seat 31 detachably mounted on the main body 10, a second coil 32 mounted on the second valve seat 31, a second magnet 33 sleeved in the second coil 32, a second elastic seat 34 disposed in the second recess, and a second sealing plate 35 mounted on the second elastic seat 34. The second valve seat 31 encloses with the second recess a closed second chamber 14.

The ignition passage 12 includes a second inlet flow passage 123 and a second outlet flow passage 124 that are disposed at an interval on the second valve seat 31. The second inlet flow channel 123 and the second outlet flow channel 124 are both communicated with the second chamber 14, and the second inlet flow channel 123 and the second outlet flow channel 124 are respectively located at two sides of the second magnet 33. The second sealing plate 35 is used to open or seal the gas inlet 1241 of the second gas outlet channel 124, the gas outlet of the second gas outlet channel 124 is communicated with the gas outlet 112 through the second connecting pipe 62, and the first gas outlet channel 122 is communicated with the second chamber 14 through the second gas inlet channel 123.

When the second coil 32 is energized, the second magnet 33 drives the second sealing plate 35 to move, so that the gas inlet end 1241 of the second gas outlet channel 124 is opened; when the second coil 32 is de-energized, the second sealing plate 35 acts under the restoring force of the second elastic seat 34, so that the second sealing plate 35 seals the gas inlet end 1241 of the second gas outlet passage 124.

In this way, the second switch valve 30 has a structure similar to that of the first switch valve 20, so that the universality is enhanced, and the rapid production and manufacturing are facilitated. In addition, the structures of the second switch valve 30 and the first switch valve 20 are realized by respectively matching the first elastic seat 24 and the second elastic seat 34 in the opening and closing processes, so that the movement is sensitive, and the labor and the electricity are saved.

It is to be understood that the second on-off valve 30 may also have a structure different from that of the first on-off valve 20 as long as it functions to block the ignition passage 12 or open the ignition passage 12, and a specific structure thereof is not limited herein.

Referring to fig. 2 and 3, in one embodiment, the wall of the first channel 113 is provided with a first mounting opening, a first cover 1133 is detachably mounted on the first mounting opening, the outer edge of the first diaphragm 41 is disposed on the first mounting opening, and the first cover 1133 and the first diaphragm 41 enclose a first backpressure chamber 1131. The wall of the third passage 115 is provided with a second mounting opening, a second cap 1153 is detachably mounted at the second mounting opening, the outer edge of the second diaphragm 51 is disposed at the second mounting opening, and the second cap 1153 and the second diaphragm 51 enclose a second back pressure chamber 1151.

In this manner, by opening the first lid 1133, the operation of attaching and detaching the first stop valve 40 to and from the first passage 113 can be facilitated; likewise, by opening the second cover 1153, the operation of attaching and detaching the second cutoff valve 50 in the third passage 115 can be facilitated. Specifically, the outer edge of the first diaphragm 41 is pressed between the first cover 1133 and the opening edge of the first mounting opening, and then the first cover 1133 is fixed to the opening edge of the first mounting opening by using a screw, a bolt, a pin, a rivet, or the like, so that the sealing performance of the first back pressure chamber 1131 can be ensured. Similarly, the outer edge of the second diaphragm 51 is pressed between the second cover 1153 and the mouth edge of the second mounting port, and then the second cover 1153 is fixed to the mouth edge of the second mounting port using a screw, bolt, pin, rivet, or the like, so that the sealing performance of the second back-pressure chamber 1151 can be ensured.

In one embodiment, the first shut off valve 40 further comprises a first rigid plate to which the first diaphragm 41 is attached. The second shut-off valve 50 further comprises a second rigid plate to which the second diaphragm 51 is attached. Thus, the first rigid plate can ensure that the first diaphragm 41 can drive the first elastic component to move when the air pressure is unbalanced, thereby realizing the opening or closing action of the first end 1141 of the second channel 114; similarly, the second rigid plate ensures that the second diaphragm 51 can move the second resilient element when the air pressure is unbalanced, thereby opening or closing the second end 1142 of the second channel 114.

In one embodiment, the first elastic element includes a first base 43 mounted on the wall of the first channel 113, a first push rod 44 movably disposed on the first base 43, and a first spring 45 sleeved on the first push rod 44. Two ends of the first spring 45 are abutted between the first base 43 and the first plugging head 42. The first blocking head 42 and the first diaphragm 41 are connected to both ends of a first push rod 44, respectively. The second elastic component includes a second base 53 installed on the wall of the third channel 115, a second push rod 54 movably installed on the second base 53, and a second spring 55 sleeved on the second push rod 54, two ends of the second spring 55 abut against between the second base 53 and the second sealing head 52, and the second sealing head 52 and the second diaphragm 51 are respectively connected with two ends of the second push rod 54.

Referring to fig. 5 to 7, fig. 7 is a schematic structural diagram illustrating a proportional regulating valve 70 and a third switch in a gas proportional valve according to an embodiment of the present invention. In one embodiment, the gas proportional valve further includes a proportional regulating valve 70 provided on the body 10 and a third on/off valve 80 provided on the proportional regulating valve 70. The proportional control valve 70 includes a frame 71, a third coil 72 fixed to the frame 71, and a moving shaft 73 movably disposed on the frame 71, wherein the third coil 72 is sleeved outside the moving shaft 73.

The third on/off valve 80 includes a housing 81 provided with a mating port, a partition 82 provided in the housing 81, a valve shaft 83 movably inserted through the partition 82, a third diaphragm 84 fixed to the valve shaft 83, and a seal holder 85 fixed to an end of the valve shaft 83. The housing 81 is mounted on the frame 71 and the third diaphragm 84 seals the interface. The partition plate 82 is provided with a shaft hole 821, the valve shaft 83 is movably arranged in the shaft hole 821, the outer diameter of the valve shaft 83 is smaller than the diameter of the shaft hole 821, and an air flow gap 86 is formed between the outer wall of the valve shaft 83 and the wall of the shaft hole 821. The valve shaft 83 is arranged coaxially with the moving shaft 73, the moving shaft 73 can drive the valve shaft 83 to move, and the valve shaft 83 can drive the sealing seat 85 to seal or open the airflow gap 86.

Referring to fig. 5 to 7, the partition 82 divides the inner space of the housing 81 into a third chamber 811 and a fourth chamber 812. A seal seat 85 is located in the third chamber 811. The housing 81 is further provided with a first air hole 813 communicated with the third chamber 811 and a second air hole 814 communicated with the fourth chamber 812, the wall of the second channel 114 is provided with a first connection hole 11434 connected with the first air hole 813 in a butt joint manner, and the main body 10 is further provided with a second connection hole 15 connected with the second air hole 814 and the gas outlet 112. The partition 82 is further provided with a third air hole 822 communicating with the air flow gap 86, and the third air hole 822 communicates with the second back pressure chamber 1151 through a third connecting pipe 63.

Thus, when the third coil 72 of the proportional regulating valve 70 is energized, the moving shaft 73 drives the valve shaft 83 to move away from the gas proportional valve, the valve shaft 83 drives the seal seat 85 to open the gas flow gap 86, the gas in the second passage 114 can enter the third chamber 811 through the first coupling hole 11434 and the first gas hole 813, and enter the gas flow gap 86 from the third chamber 811, a part of the gas in the air flow gap 86 enters the second back pressure chamber 1151 through the third air hole 822 and the third connecting pipe 63, so that the air pressure in the second back-pressure chamber 1151 is greater than the air pressure in the second positive-pressure chamber 1152, the second diaphragm 51 drives the second elastic element to move, the second elastic element drives the second blocking head 52 to open the second end 1142 of the second channel 114, at this time, the second positive pressure chamber 1152 is communicated with the second end 1142 of the second channel 114, the gas at the second end 1142 of the second channel 114 can enter the gas outlet 112 from the second plenum 1152; when the proportional control valve 70 works with currents of different magnitudes, the moving shaft 73 drives the valve shaft 83 to move upwards in different magnitudes, and the proportional size of the airflow gap 86 introduced into the third air hole 822 and the fourth cavity 812 can be adjusted, that is, the gas amount entering the second back pressure chamber 1151 and the gas amount entering the gas outlet 112 can be adjusted, so that the proportional control function is achieved.

In addition, when the gas pressure of the gas inlet 111 is increased, the gas pressure of the second passage 114 is correspondingly increased, the gas quantity entering the third chamber 811 through the second passage 114, the first connection hole 11434 and the first air hole 813 is synchronously increased, so that the pressure acting on the third diaphragm 84 of the proportional control valve 70 is increased, the moving shaft 73 of the proportional control valve 70 is driven to move downwards, and the size of the valve port communicated into the fourth chamber 812 through the air flow gap 86 can be reduced when the moving shaft 73 moves downwards, thereby achieving the purpose of pressure stabilization.

Referring to fig. 2, 3 and 7, in one embodiment, the proportional regulating valve 70 further includes a third spring 74, and the end of the moving shaft 73 away from the valve shaft 83 is connected to the frame 71 through the third spring 74. The third switching valve 80 further includes a fourth spring 87. The seal holder 85 is abutted against the inner wall of the housing 81 by a fourth spring 87. A first flange 823 is provided on one side surface of the partition 82 around the axial hole 821 in the circumferential direction, and the first flange 823 is in interference fit with the seal holder 85. A second flange 824 circumferentially disposed about the axial bore 821 on the other side of the diaphragm 82, the second flange 824 interferingly engaging the third diaphragm 84. Thus, when the first flange 823 abuts against the seal seat 85, the seal seat 85 has a good sealing effect on one end of the airflow gap 86, so that gas can be prevented from entering the airflow gap 86; similarly, when the second flange 824 abuts against the third diaphragm 84, the third diaphragm 84 has a good sealing effect on the other end of the airflow gap 86, and the gas in the airflow gap 86 is prevented from entering the fourth chamber 812.

Referring to fig. 2 and 3, in an embodiment, a gas device includes a gas proportional valve according to any one of the embodiments.

In the gas device, when the small-fire ignition function is needed to be used in the starting process of the combustion device, the first switch valve 20 and the second switch valve 30 are controlled to be opened, the gas in the gas supply source can enter the gas outlet 112 through the ignition channel 12 and is provided for the combustor through the gas outlet 112, so that the small-fire ignition can be carried out, and the safety of the ignition channel 12 is ensured through two switches because the first switch valve 20 and the second switch valve 30 are arranged on the ignition channel 12. When the combustion device is started, the function of small fire ignition is not needed, that is, the gas discharged from the gas channel 11 is directly used for ignition, and the first switch valve 20 and the second switch valve 30 are controlled to be closed.

It should be noted that in an infringement comparison, where one of the elements is described as being connected to another element and one of the elements is attached to another element, it is understood that the two elements may be connected by fasteners such as bolts, screws, pins, rivets, etc., or may be fixedly connected by snapping, welding or integral molding. Wherein, the integrated molding mode can adopt the processes of extrusion, casting, press fitting, injection molding and the like.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. A gas proportioning valve, comprising:

the ignition device comprises a main body (10), wherein a gas channel (11) is arranged on the main body (10), one end of the gas channel (11) is a gas inlet (111), the gas inlet (111) is communicated with a gas supply source, the other end of the gas channel (11) is a gas outlet (112), the gas outlet (112) is communicated with a burner, an ignition channel (12) is further arranged on the main body (10), one end of the ignition channel (12) is communicated with the gas inlet (111), and the other end of the ignition channel (12) is communicated with the gas outlet (112);

the ignition device comprises a first switch valve (20) and a second switch valve (30), wherein the first switch valve (20) and the second switch valve (30) are sequentially arranged on the ignition channel (12).

2. The gas proportioning valve of claim 1, wherein the gas passage (11) comprises a first passage (113), a second passage (114) and a third passage (115) which are arranged in sequence; the gas proportional valve further comprises a first stop valve (40) arranged in the first channel (113) and used for communicating or mutually cutting off the first channel (113) and the first end (1141) of the second channel (114), and a second stop valve (50) arranged in the third channel (115) and used for communicating or mutually cutting off the third channel (115) and the second end (1142) of the second channel (114);

the first shut-off valve (40) comprises a first diaphragm (41), a first elastic assembly and a first blocking head (42), the first diaphragm (41) is connected with the first blocking head (42) through the first elastic assembly, the first diaphragm (41) is connected with the wall of the first channel (113) to divide the inner space of the first channel (113) into a closed first back pressure chamber (1131) and a first positive pressure chamber (1132) isolated from the first back pressure chamber (1131), the first positive pressure chamber (1132) is communicated with the gas inlet (111), and the first blocking head (42) is used for sealing or opening the opening part of the first end (1141) of the second channel (114) to enable the first positive pressure chamber (1132) to be communicated with or isolated from the first end (1141) of the second channel (114);

the second stop valve (50) comprises a second diaphragm (51), a second elastic component and a second blocking head (52), the second diaphragm (51) is connected with the second blocking head (52) through the second elastic component, the second diaphragm (51) is connected with the wall of the second channel (114) to divide the inner space of the third channel (115) into a closed second back pressure chamber (1151) and a second positive pressure chamber (1152) isolated from the second back pressure chamber (1151), the second positive pressure chamber (1152) is communicated with the gas outlet (112), and the second blocking head (52) is used for closing or opening the opening part of the second end (1142) of the second channel (114) to enable the second positive pressure chamber (1152) to be communicated with or isolated from the second end (1142) of the second channel (114).

3. The gas proportioning valve according to claim 2, wherein the main body (10) is provided with a first recess, and the first on-off valve (20) comprises a first valve seat (21) detachably mounted on the main body (10), a first coil (22) mounted on the first valve seat (21), a first magnet (23) fitted in the first coil (22), a first elastic seat (24) disposed in the first recess, and a first sealing plate (25) mounted on the first elastic seat (24); the first valve seat (21) and the first concave part enclose to form a closed first chamber (13), and the first chamber (13) is communicated with a first backpressure chamber (1131) through a first connecting pipeline (61);

the ignition channel (12) comprises a first air inlet flow channel (121) and a first air outlet flow channel (122) which are arranged on the first valve seat (21) at intervals, the first air inlet flow channel (121) and the first air outlet flow channel (122) are communicated with the first chamber (13), the first air inlet flow channel (121) and the first air outlet flow channel (122) are respectively positioned at two sides of the first magnet (23), and the air inlet end of the first air inlet flow channel (121) is communicated with the gas inlet (111); the first sealing plate (25) is used for sealing or opening the gas outlet end (1211) of the first gas inlet flow channel (121) and sealing or opening the gas inlet end (1221) of the first gas outlet flow channel (122);

when the first coil (22) is electrified, the first magnet (23) drives the first sealing plate (25) to act, so that the gas inlet end (1221) of the first gas outlet flow channel (122) is opened, and the gas outlet end (1211) of the first gas inlet flow channel (121) is closed; when the first coil (22) is powered off, the first sealing plate (25) acts under the action of the resetting force of the first elastic seat (24), so that the first sealing plate (25) opens the air outlet end (1211) of the first air inlet flow channel (121) and seals the air inlet end (1221) of the first air outlet flow channel (122).

4. The gas proportioning valve of claim 3, wherein a second recess is further provided on the main body (10), and the second switching valve (30) comprises a second valve seat (31) detachably mounted on the main body (10), a second coil (32) mounted on the second valve seat (31), a second magnet (33) sleeved in the second coil (32), a second elastic seat (34) provided in the second recess, and a second sealing plate (35) mounted on the second elastic seat (34); the second valve seat (31) and the second recess enclose to form a closed second chamber (14);

the ignition channel (12) comprises a second air inlet flow channel (123) and a second air outlet flow channel (124) which are arranged on the second valve seat (31) at intervals, the second air inlet flow channel (123) and the second air outlet flow channel (124) are communicated with the second chamber (14), and the second air inlet flow channel (123) and the second air outlet flow channel (124) are respectively positioned at two sides of the second magnet (33); the second sealing plate (35) is used for opening or sealing a gas inlet end (1241) of the second gas outlet flow channel (124), a gas outlet end of the second gas outlet flow channel (124) is communicated with the gas outlet (112) through a second connecting pipeline (62), and the first gas outlet flow channel (122) is communicated with the second chamber (14) through the second gas inlet flow channel (123);

when the second coil (32) is electrified, the second magnet (33) drives the second sealing plate (35) to act so that the gas inlet end (1241) of the second gas outlet flow passage (124) is opened; when the second coil (32) is powered off, the second sealing plate (35) acts under the action of the restoring force of the second elastic seat (34), so that the second sealing plate (35) seals the air inlet end (1241) of the second air outlet flow passage (124).

5. The gas proportional valve according to claim 2, wherein a wall of the first passage (113) is provided with a first mounting opening, a first cover (1133) is detachably mounted at the first mounting opening, an outer edge of the first diaphragm (41) is arranged at the first mounting opening, and the first cover (1133) and the first diaphragm (41) enclose the first backpressure chamber (1131);

the wall of the third channel (115) is provided with a second mounting opening, a second sealing cover (1153) is detachably arranged at the second mounting opening, the outer edge of the second diaphragm (51) is arranged at the second mounting opening, and the second sealing cover (1153) and the second diaphragm (51) are enclosed to form the second back pressure chamber (1151).

6. The gas proportioning valve of claim 2 wherein said first shut off valve (40) further comprises a first rigid plate, said first diaphragm (41) being attached to said first rigid plate; the second stop valve (50) further comprises a second hard plate, and the second diaphragm (51) is attached to the second hard plate.

7. The gas proportional valve according to claim 6, wherein the first elastic component comprises a first base (43) mounted on the wall of the first channel (113), a first push rod (44) movably disposed on the first base (43), and a first spring (45) sleeved on the first push rod (44), two ends of the first spring (45) are abutted between the first base (43) and the first blocking head (42), and the first blocking head (42) and the first diaphragm (41) are respectively connected to two ends of the first push rod (44); the second elastic component comprises a second base (53) arranged on the wall of the third channel (115), a second push rod (54) movably arranged on the second base (53) and a second spring (55) sleeved on the second push rod (54), two ends of the second spring (55) are abutted between the second base (53) and the second sealing head (52), and the second sealing head (52) and the second diaphragm (51) are respectively connected with two ends of the second push rod (54).

8. The gas proportional valve according to claim 2, further comprising a proportional regulating valve (70) provided on the main body (10) and a third on/off valve (80) provided on the proportional regulating valve (70); the ratio regulating valve (70) comprises a frame (71), a third coil (72) fixedly arranged on the frame (71) and a moving shaft (73) movably arranged on the frame (71), wherein the third coil (72) is sleeved outside the moving shaft (73);

the third switch valve (80) comprises a shell (81) provided with a butt joint, a partition plate (82) arranged in the shell (81), a valve shaft (83) movably arranged on the partition plate (82) in a penetrating mode, a third diaphragm (84) fixedly arranged on the valve shaft (83) and a sealing seat (85) fixedly arranged at the end portion of the valve shaft (83); the housing (81) is arranged on the frame (71), and the third diaphragm (84) seals the butt joint port; a shaft hole (821) is formed in the partition plate (82), the valve shaft (83) is movably arranged in the shaft hole (821), the outer diameter of the valve shaft (83) is smaller than the diameter of the shaft hole (821), and an airflow gap (86) is formed between the outer wall of the valve shaft (83) and the wall of the shaft hole (821); the valve shaft (83) is coaxially arranged with the moving shaft (73), the moving shaft (73) can drive the valve shaft (83) to move when moving, and the valve shaft (83) can drive the sealing seat (85) to seal or open the airflow gap (86);

the partition plate (82) divides the internal space of the housing (81) into a third chamber (811) and a fourth chamber (812), the seal seat (85) being located in the third chamber (811); the shell (81) is further provided with a first air hole (813) communicated with the third chamber (811) and a second air hole (814) communicated with the fourth chamber (812), the wall of the second channel (114) is provided with a first butt hole (11434) in butt joint communication with the first air hole (813), and the main body (10) is further provided with a second butt hole (15) in communication with the second air hole (814) and the gas outlet (112); and a third air hole (822) communicated with the airflow gap (86) is further formed in the partition plate (82), and the third air hole (822) is communicated with the second back pressure chamber (1151) through a third connecting pipeline (63).

9. The gas proportional valve according to claim 8, characterized in that the proportional regulating valve (70) further comprises a third spring (74), and the end of the moving shaft (73) remote from the valve shaft (83) is connected with the frame (71) through the third spring (74); the third switch valve (80) further comprises a fourth spring (87), and the sealing seat (85) is abutted against the inner wall of the shell (81) through the fourth spring (87); a first flange (823) arranged on one side surface of the partition plate (82) in the circumferential direction around the shaft hole (821), wherein the first flange (823) is in interference fit with the sealing seat (85); a second flange (824) disposed circumferentially around the axial bore (821) on the other side of the spacer (82), the second flange (824) being in interference fit with the third diaphragm (84).

10. A gas appliance, characterized in that it comprises a gas proportional valve according to any one of claims 1 to 9.

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