CN210153293U - Gas valve for gas stove - Google Patents

Gas valve for gas stove Download PDF

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Publication number
CN210153293U
CN210153293U CN201920876713.2U CN201920876713U CN210153293U CN 210153293 U CN210153293 U CN 210153293U CN 201920876713 U CN201920876713 U CN 201920876713U CN 210153293 U CN210153293 U CN 210153293U
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gas
channel
valve body
switch
state
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CN201920876713.2U
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Chinese (zh)
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李少杰
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Shengli Guangzhou Pressure Reducing Valve Manufacturing Co Ltd
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Shengli Guangzhou Pressure Reducing Valve Manufacturing Co Ltd
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Abstract

The utility model discloses a gas valve for a gas furnace, which comprises a valve body, wherein the valve body is provided with a first channel, a second channel, a decompression cavity and an exhaust channel which are sequentially communicated, and a first gas on-off switch, a second gas on-off switch and a gas source interface which are arranged on the valve body; the first gas on-off switch and the first channel surround a transition cavity, and when the gas pressure of the fuel gas in the transition cavity is greater than a set first limit pressure, the first gas on-off switch blocks the second channel from the gas source interface; when the gas pressure of the fuel gas in the decompression cavity is greater than a set second limit pressure, the second gas on-off switch blocks the decompression cavity from the second channel; the air source interface and the first air on-off switch are coaxially arranged. Therefore, when the gas pressure in the valve body exceeds the set limit pressure, the exhaust channel is automatically blocked from an external gas source through the first gas on-off switch and the second gas on-off switch, and double insurance is realized; the gas source interface and the first gas on-off switch are coaxially arranged, so that the structure of the valve body is simplified and compact.

Description

Gas valve for gas stove
Technical Field
The utility model relates to a gas valve technical field, concretely relates to gas valve for gas furnace.
Background
The general gas valve is used for connecting or cutting off a gas furnace and a gas source, gas connected into the gas valve from the gas source can be discharged through an exhaust pipe communicated with the gas valve, then the gas discharged from an exhaust port of the exhaust pipe is ignited through an ignition device arranged on the gas valve or on the gas furnace outside the gas valve, and the gas discharged from the exhaust port of the exhaust pipe is ignited.
However, a general gas valve (for example, a portable gas stove and a valve thereof disclosed in utility model CN 207830634U) cannot automatically disconnect the gas stove from the gas source when the pressure of the introduced gas source exceeds the safety standard, and the gas stove is continuously used when the gas pressure exceeds the safety standard, so that the gas stove is easily exploded and has potential safety hazard.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the general gas valve can't automatically disconnect the gas stove and the path of gas source under the condition that the pressure of the introduced gas source exceeds the safety standard, the potential safety hazard exists, according to the utility model discloses an aspect provides a gas valve for gas stove.
This gas valve for gas furnace includes: the valve body is provided with a first channel, a second channel, a decompression cavity and an exhaust channel which are sequentially communicated; the gas source interface is arranged on the valve body and used for being detachably and hermetically connected with an external gas source, the gas source interface is provided with a gas inlet channel, and the gas inlet channel is arranged to communicate the first channel with the outside; the first gas on-off switch is arranged in the first channel in a sliding mode, the first gas on-off switch and the first channel are encircled to form a transition cavity, the first gas on-off switch is provided with a first off state corresponding to the condition that a gas source interface is not connected with an external gas source, a second off state corresponding to the condition that the gas pressure of gas introduced into the first channel is greater than a set first limit pressure and a first on state corresponding to the condition that the gas pressure of gas introduced into the transition cavity is less than the set first limit pressure, the first gas on-off switch is arranged in a mode that in the first off state and the second off state, the first gas on-off switch and the first channel are encircled to form the transition cavity, the transition cavity is communicated with the second channel and is not communicated with the gas inlet channel, and in the first on state, the second channel is communicated with the gas inlet channel through the transition cavity; the second gas on-off switch is arranged on the valve body, and has a third off state corresponding to the situation that the gas pressure of the fuel gas introduced into the decompression cavity is greater than a set second limit pressure and a second on state in other states; the air source interface and the first air on-off switch are coaxially arranged.
When the gas valve for the gas furnace is used, the gas valve for the gas furnace is fixedly arranged on the gas furnace, and before the gas valve for the gas furnace is not connected with an external gas source (the external gas source can be a pipeline communicated with gas or a gas bottle containing gas for example), because the first gas on-off switch is arranged, a transition cavity formed by the first gas on-off switch and the first channel is not communicated with the gas inlet channel, namely, at the moment, the gas cannot enter the transition cavity through the gas inlet channel and cannot enter the second channel; then, can dismantle sealing connection with air supply interface and outside gas air supply, both connect the back, and the gas in the outside gas air supply can flow through inlet channel, transition chamber, second passageway, decompression chamber and exhaust passage in proper order, after a period of gas flow, three kinds of circumstances can appear: in the first case, the gas flowing into the gas valve for the gas furnace flows out through the exhaust passage; under the second condition, the exhaust channel is closed, the air pressure of the fuel gas in the decompression cavity is greater than the second limit pressure, at the moment, the second gas on-off switch blocks the decompression cavity from the second channel, and dangerous events such as explosion and the like caused by the fact that the fuel gas in the decompression cavity is too high due to the fact that the fuel gas continuously enters the decompression cavity and the exhaust channel, the exhaust channel is opened again, and the high-pressure fuel gas exhausted from the exhaust channel is ignited are avoided; under the third condition, the exhaust passage is closed, and the gaseous on-off switch of second blocks decompression chamber and second passageway, the atmospheric pressure of the gas in the transition chamber is greater than first limit pressure, at this moment, first gaseous on-off switch blocks transition chamber and inlet channel, avoid continuing to get into in the transition chamber because of the gas, lead to excessive intracavity medium pressure too high, when the pressure in the decompression chamber is less than second limit pressure, when the gaseous on-off switch of second will decompress chamber and second passageway intercommunication, high-pressure gas in the transition chamber flows like in the decompression chamber through the second passageway instantaneously, lead to the gas pressure in the decompression chamber too high, then, the second kind of condition appears. Because the first gas on-off switch and the second gas on-off switch are arranged, when the gas pressure in the valve body exceeds the set limit pressure, the first gas on-off switch and the second gas on-off switch automatically block the exhaust channel from an external gas source, and double insurance is realized; and because the gas source interface and the first gas on-off switch are coaxially arranged, on one hand, the processing of the first channel and the installation of the first gas on-off switch and the gas source interface are convenient, the structure of the valve body is simplified and compact, and on the other hand, the gas can flow in the valve body conveniently.
In some embodiments, the gas source interface comprises a gas source connection block for detachable connection with an external gas source; the air inlet channel is arranged in the air source connecting block; the inner wall of the gas source connecting block, which is provided with the gas inlet channel, is also provided with a first annular groove and a second annular groove which are coaxially arranged with the gas inlet channel, and sealing rings matched with an external gas source are filled in the first annular groove and the second annular groove; a third annular groove is formed in the periphery of the gas source connecting block, and a third sealing ring is filled in the third annular groove; the air source connecting block is installed on the valve body and arranged in the first channel, and the outer diameter of the third sealing ring is abutted against the inner wall, provided with the first channel, of the valve body, so that the transition cavity is not communicated with the outside in the first disconnection state and the second disconnection state. Therefore, when the gas source interface is connected with an external gas source, the gas source interface can be hermetically connected with the external gas source through the first sealing ring and the second sealing ring, so that the leakage of the gas of the external gas source, which is introduced into the gas valve for the gas furnace, from the joint of the gas source interface and the external gas source is avoided; when the first gas on-off switch is in the first off state and the second off state, the third sealing ring ensures that the transition cavity is not communicated with the outside, so that the gas introduced into the transition cavity is prevented from leaking out; and because the external diameter of the third sealing ring is abutted against the inner wall of the valve body, which is provided with the first channel, when the first gas on-off switch is in the first opening state, because the external gas source is detachably and hermetically connected with the gas source interface, the gas introduced into the transition cavity can only flow into the decompression cavity through the second channel and is discharged through the exhaust channel, and cannot leak from the gap between the gas source connecting block and the valve body, thereby ensuring the use safety of the gas valve for the gas furnace.
In some embodiments, the gas source connection block comprises a first connection block and a second connection block; the first connecting block is provided with a first gas channel communicated with the outside and a second gas channel communicated with the first gas channel and the second connecting block, the second connecting block is provided with a third gas channel communicated with the second gas channel and the first gas on-off switch, the periphery of the second connecting block is provided with an annular flange, and the first gas channel, the second gas channel and the third gas channel form a gas inlet channel together; the second connecting block is arranged in the second gas channel, the first connecting block is arranged on the valve body, the annular flange is arranged outside the second gas channel, and the first connecting block and the second connecting block surround a third annular groove; the first annular groove and the second annular groove are formed in the first connecting block. Therefore, the processing of the air source connecting block and the installation of the sealing ring are facilitated.
In some embodiments, the first connecting block is made of a zinc alloy and the second connecting block is made of an aluminum alloy. The first connecting block is made of zinc alloy, so that the valve has certain strength and corrosion resistance, the first connecting block is convenient to connect with the valve body and an external fuel gas source, and the service life of the first connecting block is ensured; the second connecting block is made of aluminum alloy, so that the second connecting block has certain strength, and meanwhile, the weight of the second connecting block is reduced.
In some embodiments, the first gas on-off switch comprises: the sliding rod is matched in the first channel, and a fourth annular groove and a fifth annular groove are formed in the periphery of the sliding rod; the fourth sealing ring is filled in the fourth annular groove, the fifth sealing ring is filled in the fifth annular groove, and the fifth sealing ring is matched with the first channel; the first elastic piece is arranged on the sliding rod and arranged along the flowing direction of the fuel gas in the first channel, one end of the first elastic piece abuts against the sliding rod, and the other end of the first elastic piece abuts against the valve body; the first elastic piece is provided with a first compression state corresponding to the first disconnection state, a third compression state corresponding to the second disconnection state and a second compression state corresponding to the first opening state; the fourth sealing ring and the fifth sealing ring are arranged to be positioned on one side, close to the air source interface, of the second channel when the first elastic piece is in the first compression state and the second compression state, the fifth sealing ring is positioned on one side, away from the air source interface, of the second channel, the fourth sealing ring is further arranged to be abutted against the air source interface when the first elastic piece is in the first compression state, the fourth sealing ring is in clearance fit with the first channel of the valve body when the first elastic piece is in the second compression state, and the fourth sealing ring is matched with the first channel when the first elastic piece is in the third compression state. Due to the arrangement of the first elastic part, the fourth sealing ring and the fifth sealing ring, when the first elastic part is in a first compression state, the fourth sealing ring is abutted against the air source interface, and at the moment, the fourth sealing ring blocks the air inlet channel from the transition cavity to keep the interior of the transition cavity clean; when the first elastic piece is in a second compression state, the transition cavity is communicated with the air inlet channel, and at the moment, fuel gas introduced through the air inlet channel can enter the transition cavity, sequentially passes through the second channel and the decompression cavity and is finally discharged through the exhaust channel; when first elastic component was in the third compression state, the fourth sealing washer blocked inlet channel and transition chamber, avoided the gas pressure in the transition chamber too high.
In some embodiments, the valve body is further provided with a slide bar extension port for communicating the first channel with the outside, and the slide bar extension port is coaxially arranged with the slide bar and arranged at one end of the valve body far away from the air source interface; the outer diameter of the sliding rod is also provided with a positioning clamping groove, the positioning clamping groove is arranged on one side, away from the air source interface, of the fifth annular groove, one end, away from the air source interface, of the positioning clamping groove is provided with an end head, the end head is set to extend out of the extending port of the sliding rod in a first disconnecting state, a second disconnecting state and a first opening state, and the positioning clamping groove is set to extend out of the valve body from the extending port of the sliding rod in the second disconnecting state; the valve body is also provided with a limit switch with a driving mechanism, and the limit switch is set to abut against the outer diameter of the sliding rod under the driving of the driving mechanism. Therefore, when the first gas on-off switch is in the second off state, the positioning clamping groove of the sliding rod can extend out of the extending port of the sliding rod, then the limit switch is abutted against the clamping groove of the sliding rod under the driving of the driving mechanism of the limit switch so as to prevent the positioning clamping groove on the sliding rod from retracting into the first channel, so that the first gas on-off switch is kept in the second off state, and the gas valve for the gas furnace is prevented from being reduced in safety and stability due to the fact that the first gas on-off switch repeatedly changes between the second off state and the first off state or the first on state when the gas pressure of gas entering the transition cavity fluctuates up and down at the first limit pressure; by arranging the limit switch, the gas pressure in the transition cavity is further prevented from being too high, and the safety of a gas valve for the gas furnace is further ensured; the limit switch can be driven to move towards one side away from the sliding rod by manually operating the driving mechanism, so that the positioning clamping groove on the sliding rod retracts into the first channel, and the gas valve for the gas furnace can be continuously used.
In some embodiments, the limit switch comprises: the limiting block can be connected to the valve body in a pivoting mode, and an arc-shaped groove which is coaxial with a pivoting shaft of the limiting block is formed in the limiting block; the torsional spring is sleeved on the valve body, the torsional spring and a pivoting shaft of the limiting block are coaxially arranged, and the torsional spring is arranged to drive the limiting block to abut against the outer diameter of the sliding rod so that the torsional spring forms a driving mechanism; the valve body is also provided with a positioning block at the position corresponding to the arc-shaped groove, and the positioning block is arranged into a cylindrical bulge matched with the groove width of the arc-shaped groove. Therefore, under the driving of the torsion spring, the limiting block is abutted against the sliding rod; when first gaseous on-off switch is in the second off-state, positioning groove stretches out the outside that the valve body stretches out from the slide bar, the stopper supports under torsion spring's drive and leans on in positioning groove, under the drive of no external force, even when atmospheric pressure in the transition chamber is less than first extreme pressure, positioning groove also can't retract in the first passageway, need rotate the stopper orientation that deviates from the slide bar through artificial or other actuating mechanism, exert pressure to torsion spring this moment, when the atmospheric pressure in transition chamber is less than first extreme pressure, under the effect of first elastic component, the slide bar can move towards the direction of air supply interface, move into in the first passageway until positioning groove.
In some embodiments, the valve body is further provided with a third channel and a gas flow regulating cavity which are communicated with each other; the exhaust channel is communicated with the decompression cavity through the gas flow regulating cavity and the third channel in sequence; and a flow regulating device for regulating the flow of the gas flowing into the exhaust channel from the third channel is arranged in the gas flow regulating cavity. Therefore, the size of the gas discharged from the exhaust channel can be adjusted through the gas flow adjusting device, the gas flow adjusting device is more convenient to use, the gas flow adjusting device can also be used as a gas discharge switch of a gas valve for the gas furnace, the discharge amount of the gas flow adjusting device is adjusted to zero, and namely the exhaust channel is closed.
In some embodiments, a flow regulating device comprises: the gas flow regulating device comprises a barrel-shaped sealing sleeve which is non-rotatably sleeved in a gas flow regulating cavity, wherein the sealing sleeve is provided with an accommodating cavity with an opening, the bottom of the sealing sleeve is provided with a first sealing sleeve through hole which communicates a third channel with the accommodating cavity, the first sealing sleeve through hole is eccentrically arranged, and the side wall of the sealing sleeve is provided with a second sealing sleeve through hole which communicates the accommodating cavity with an exhaust channel; the adjusting head is rotatably sleeved in the accommodating cavity and comprises an adjusting part and an adjusting handle, the adjusting part is adapted in the accommodating cavity, the adjusting handle is positioned outside the accommodating cavity, the adjusting part is provided with a first adjusting head through hole corresponding to the first sealing sleeve through hole and a second adjusting head through hole corresponding to the second sealing sleeve through hole, and the first adjusting head through hole is communicated with the second adjusting head through hole; can dismantle the adjusting device mounting panel of fixed connection on the valve body and locate the second elastic component between adjusting device mounting panel and the adjustment head, be equipped with the adjustment head that supplies the adjustment handle to stretch out on the adjusting device mounting panel and pass through the hole, the one end of second elastic component supports and leans on the adjusting device mounting panel, and the other end supports and leans on the adjustment portion. Because the first seal sleeve through hole and the first adjusting head through hole are eccentrically arranged, in the process of rotating the adjusting head, when the first adjusting head through hole is not communicated with the first seal sleeve through hole, the gas in the third channel cannot be discharged into the exhaust channel through the flow adjusting device, and at the moment, the flow adjusting device is equivalent to close the exhaust channel; when the adjusting head is rotated until the first adjusting head through hole corresponds to the first sealing sleeve through hole and the second adjusting head through hole corresponds to the second sealing sleeve through hole, the gas quantity discharged into the exhaust channel by the third channel through the flow regulating device is maximum; when the adjusting head is rotated to the state that the first adjusting head through hole is staggered with the first sealing sleeve through hole and the second adjusting head through hole is staggered with the second sealing sleeve through hole, the gas quantity discharged into the exhaust passage through the flow regulating device by the third passage is smaller than the maximum value, and the value of the gas quantity is increased along with the staggered area of the first adjusting head through hole and the first sealing sleeve through hole and the increase of the staggered area of the second adjusting head through hole and the second sealing sleeve through hole.
In some embodiments, the valve body is further provided with an ignition device for igniting the gas discharged from the exhaust passage. Therefore, when the gas discharged from the exhaust channel needs to be ignited, the gas can be ignited by the ignition device of the gas valve for the gas furnace, and the use is convenient.
Drawings
Fig. 1 is a schematic structural view of a gas valve for a gas furnace according to an embodiment of the present invention;
FIG. 2 is a schematic view of a gas valve for the gas stove shown in FIG. 1 from another perspective;
FIG. 3 is a schematic structural view of a gas valve for the gas furnace shown in FIG. 1, with an exhaust pipe and an ignition head omitted;
FIG. 4 is a schematic view of a gas valve for the gas stove of FIG. 3 from another perspective;
FIG. 5 is a schematic view of a gas valve for the gas stove of FIG. 3 from a further perspective;
FIG. 6 is a schematic sectional view taken along A-A of the gas valve for a gas furnace shown in FIG. 5, in which a first passage communicates with a decompression chamber;
FIG. 7 is a sectional view schematically showing a configuration of a gas valve for the gas furnace shown in FIG. 6 in a state where a first passage is blocked from a decompression chamber;
FIG. 8 is a sectional view schematically showing a configuration of a gas valve for the gas furnace shown in FIG. 6 in a state where a first passage and an intake passage are blocked;
FIG. 9 is a schematic sectional view of a gas valve for the gas furnace shown in FIG. 5 taken along the line B-B;
FIG. 10 is a schematic view showing a gas valve for the gas stove of FIG. 3 from a further perspective;
FIG. 11 is a schematic view of a gas valve for the gas furnace shown in FIG. 10, taken along the H-H section;
FIG. 12 is a schematic sectional view taken along the line I-I of a gas valve for the gas furnace shown in FIG. 10;
FIG. 13 is a schematic view showing a disassembled state of a gas valve for the gas furnace shown in FIG. 3;
FIG. 14 is a schematic structural view of the valve body of FIG. 13;
FIG. 15 is a schematic structural view from another perspective of the valve body of FIG. 14;
FIG. 16 is a schematic view of the valve body of FIG. 15 taken along the line K-K;
FIG. 17 is a schematic view of the valve body of FIG. 15 taken along the line L-L;
FIG. 18 is a schematic view of the valve body of FIG. 15 taken along the line M-M;
figure 19 is a schematic view of the structure of the gland of figure 15;
FIG. 20 is a schematic view of the adjustment head of FIG. 15;
fig. 21 is a schematic view of another angle of view of the adjustment head shown in fig. 15.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Fig. 1 to 21 schematically show a gas valve for a gas furnace according to an embodiment of the present invention.
As shown in fig. 6 to 8 and 12, the gas valve for a gas furnace includes: the valve body 20 is integrally formed or machined on the valve body 20, and a first channel 21, a second channel 22, a decompression cavity 23 and an exhaust channel 26 which are sequentially communicated are formed or machined on the valve body 20, wherein the integral forming can be realized by adopting a die casting mode; the gas source interface 30 is arranged on the valve body 20 and used for being detachably connected with an external gas source in a sealing mode, the gas source interface 30 is provided with a gas inlet channel 301, and the gas inlet channel 301 is used for communicating the first channel 21 with the outside; the first gas on-off switch 40 is slidably arranged in the first channel 21, the first gas on-off switch 40 and the first channel 21 surround to form a transition cavity 401, the first gas on-off switch 40 has a first off state, a second off state and a first on state, wherein in the first off state, the gas source interface 30 is not connected with an external gas source, in the second off state, the gas pressure of gas introduced into the transition cavity 401 is greater than a set first limit pressure, and in the first on state, the gas source interface 30 is connected with the external gas source to enable the gas inlet channel 301 to be communicated with the transition cavity 401, and the gas pressure of gas introduced into the transition cavity 401 is less than the set first limit pressure; the first gas on-off switch 40 is arranged such that in a first off state and a second off state, the first gas on-off switch 40 and the first passage 21 enclose a transition cavity 401, the transition cavity 401 is communicated with the second passage 22 and is not communicated with the air inlet passage 301, and in a first on state, the second passage 22 is communicated with the air inlet passage 301 through the transition cavity 401; a second gas on-off switch 50 provided on the valve body 20, the second gas on-off switch 50 having a third off state and a second on state, wherein in the third off state, the gas pressure of the gas introduced into the decompression chamber 23 is greater than a set second limit pressure, at this time, the second gas on-off switch 50 disconnects the decompression chamber 23 from the second passage 22, the third off state occurs under a condition that the exhaust passage 26 is closed, when the gas pressure of the gas in the decompression chamber 23 is less than the set second limit pressure, the second gas on-off switch 50 is in the second on state, at this time, the decompression chamber 23 is communicated with the second passage 22; wherein the second off state needs to occur when the third off state occurs; the air source interface 30, the first channel 21 and the first air on-off switch 40 are coaxially arranged.
Specifically, the gas valve can be dismantled with outside gas air supply (especially the gas bottle) and the connected mode can be dismantled with outside gas air supply to the gas source interface 30 that can dismantle the sealed connected mode with the outside gas air supply and use commonly used among the prior art and realize, the utility model discloses do not limit to the concrete connected mode of gas source interface 30 and outside gas air supply.
When using this gas valve for gas stove, with this gas valve for gas stove through establishing at the outside installation screw 27 and screw 28 fixed mounting on the gas stove of valve body 20, before this gas valve for gas stove is connected with outside gas air supply, owing to set up first gas on-off switch 40, transition chamber 401 that first gas on-off switch 40 and first passageway 21 surround does not communicate with inlet channel 301, this moment promptly, the gas can not get into transition chamber 401 through inlet channel 301, also can not get into in the second passageway 22, then, with air supply interface 30 and outside gas air supply sealing connection, preferably can dismantle the connection, after both connect, outside gas air supply can flow through inlet channel 301 in proper order, transition chamber 401, second passageway 22, decompression chamber 23 and exhaust passage 26, after gas flows a period, three kinds of circumstances can appear: in the first case, as shown in fig. 6, the gas flowing into the gas valve for the gas furnace flows out through the exhaust passage 26; in the second situation, as shown in fig. 7, the exhaust passage 26 is closed, the gas pressure in the decompression chamber 23 is greater than the second limit pressure, and at this time, the second gas on-off switch 50 blocks the decompression chamber 23 from the second passage 22, so as to avoid the occurrence of dangerous events such as explosion and the like caused by that the gas pressure in the decompression chamber 23 and the exhaust passage 26 is too high due to the fact that the gas continues to enter the decompression chamber 23 and the exhaust passage 26, and the exhaust passage 26 is opened again and the high-pressure gas discharged from the exhaust passage 26 is ignited; in the third case, as shown in fig. 8, the exhaust passage 26 is closed, and the second gas on-off switch 50 blocks the decompression chamber 23 from the second passage 22, and the gas pressure of the gas in the transition chamber 401 is greater than the first limit pressure, at this time, the first gas on-off switch 40 blocks the transition chamber 401 from the gas inlet passage 301, so as to avoid that the pressure in the transition chamber 401 is too high because the gas continues to enter the transition chamber 401, and when the pressure in the decompression chamber 23 is lower than the second limit pressure, the second gas on-off switch 50 communicates the decompression chamber 23 with the second passage 22, and simultaneously, the high-pressure gas in the transition chamber 401 instantaneously flows through the second passage 22 into the decompression chamber 23, so that the gas pressure in the decompression chamber 23 is too high, and then, the second case occurs. Due to the arrangement of the first gas on-off switch 40 and the second gas on-off switch 50, when the gas pressure in the valve body 20 exceeds the set limit pressure, the first gas on-off switch 40 and the second gas on-off switch 50 automatically block the exhaust channel 26 from an external gas source, so that double insurance is realized; moreover, because the air source interface 30, the first channel 21 and the first air on-off switch 40 are coaxially arranged, on one hand, the processing of the first channel 21 and the installation of the first air on-off switch 40 and the air source interface 30 are facilitated, the structure of the valve body 20 is simplified and compact, and on the other hand, the flowing of fuel gas in the valve body 20 is facilitated.
The specific structure of the valve body 20 is as shown in fig. 14 to 18, and as shown in fig. 16, the first passage 21 communicates with the outside through a first opening 211 integrally formed or machined on the surface of the valve body 20, and the first gas on-off switch 40 can be installed in the first passage 21 through the first opening 211; the second passage 22 communicates with the first passage 21 through a second opening 221 integrally formed or machined on the inner wall of the first passage 21 of the valve body 20, and communicates with the decompression chamber 23 through a third opening 231 integrally formed or machined on the wall of the decompression chamber 23 of the valve body 20, the decompression chamber 23 communicates with the outside through a decompression chamber opening 232 integrally formed or machined on the surface of the valve body 20, and the second gas on-off switch 50 can be installed into the decompression chamber 23 through the decompression chamber opening 232. Thereby, the second passage 22 communicates with the outside through the decompression chamber 23. The third opening 231 is not blocked by the valve body 20 on the path extending toward the side of the decompression chamber 23 in the extending direction of the second passage 22, and when the second passage 22 is machined by machining or casting, a machining tool or a forming die of the second passage 22 can be passed through the decompression chamber opening 232 and the decompression chamber 23 to form the second passage 22 on the valve body 20, and the machining is convenient, and preferably, the second passage 22 is arranged perpendicular to the first passage 21 to more conveniently machine the second passage 22. As shown in fig. 18, the exhaust passage 26 communicates with the outside through a sixth opening 261 integrally formed or machined in the surface of the valve body 20.
The gas source interface 30 is implemented as shown in fig. 6 to 8 and 13, the gas source interface 30 includes a gas source connecting block 31 for being hermetically connected with an external gas source; the air inlet channel 301 is arranged in the air source connecting block 31, and the air inlet channel 301 and the first air on-off switch 40 are coaxially arranged; still be equipped with on the inner wall that is equipped with inlet channel 301 of air supply connecting block 31 and with inlet channel 301 coaxial arrangement (the mode of setting can be integrated into one piece, also can be processing and make) first ring channel 311 and second ring channel 312, all fill in first ring channel 311 and the second ring channel 312 have with the sealing washer of outside gas air supply adaptation, it is concrete, it has first sealing washer 313 to fill in first ring channel 311, it has second sealing washer 314 to fill in second ring channel 312, so that outside gas air supply is connected for sealing connection with air supply interface 30, the concrete connected mode refers to the connected mode of common gas furnace gas valve for the gas stove and outside gas air supply among the prior art, the utility model discloses do not limit to this. A third annular groove 315 is formed in the periphery of the gas source connecting block 31, and a third sealing ring 316 is filled in the third annular groove 315; the gas source connecting block 31 is installed on the valve body 20, preferably, in the first passage 21, to achieve a compact structure of the gas valve for a gas furnace, and the outer diameter of the third sealing ring 316 abuts against the inner wall of the valve body 20, on which the first passage 21 is provided, so that the transition chamber 401 is not communicated with the outside in both the first off-state and the second off-state. Therefore, when the gas source interface 30 is detachably connected with an external gas source, the detachable sealing connection between the gas source interface 30 and the external gas source can be realized through the first sealing ring 313 and the second sealing ring 314, so that the leakage of the gas of the external gas source, which is introduced into the gas valve for the gas furnace, from the connection part of the gas source and the external gas valve is avoided; when the first gas on-off switch 40 is in the first off state and the second off state, the third sealing ring 316 ensures that the transition cavity 401 is not communicated with the outside, so that the gas introduced into the transition cavity 401 is prevented from leaking out, and the sealing property of the connection between the gas source connecting block and the valve body is realized; and because the outer diameter of the third sealing ring 316 is abutted against the inner wall of the valve body 20, which is provided with the first channel 21, when the first gas on-off switch 40 is in the first opening state, because the external gas source is detachably and hermetically connected with the gas source interface 30, the gas introduced into the transition cavity 401 can only flow into the decompression cavity 23 through the second channel 22 and is discharged through the exhaust channel 26, and cannot leak from the gap between the gas source connecting block 31 and the valve body 20, thereby ensuring the use safety of the gas valve for the gas furnace.
Further, with continued reference to fig. 6-8 and 13, the gas supply connection block 31 includes a first connection block 32 and a second connection block 33; the first connection block 32 is integrally formed or machined with a first gas passage 321 communicating with the outside and a second gas passage 322 communicating the first gas passage 321 with the second connection block 33, the second connection block 33 is accommodated in the second gas passage 322, the second connection block 33 is integrally formed or machined with a third gas passage 331 communicating the second gas passage 322 with the first gas on-off switch 40, a part of the first gas on-off switch 40 is accommodated in the third gas passage 331 and the other part is accommodated in the first passage 21, an annular flange 332 is integrally formed, machined or connected to the outer periphery of the second connection block 33, and the first gas passage 321, the second gas passage 322 and the third gas passage 331 together form the gas inlet passage 301; the first connecting block 32 and the second connecting block 33 are arranged in the first channel 21, the first connecting block 32 is arranged on the valve body 20, the annular flange 332 is arranged outside the second gas channel 322, and the first connecting block 32 and the second connecting block 33 surround a third annular groove 315; a first annular groove 311 and a second annular groove 312 are provided on the first connecting block 32. Thereby, the processing of the gas source connecting block 31 and the installation of the sealing ring are facilitated.
In this embodiment, as shown in fig. 3, 5 to 8, 12 and 13, the gas source connecting block 31 may be pressed in the first passage 21 by the inlet port mounting plate 34 connected to the valve body 20, so that the outer diameter of the third sealing ring 316 abuts against the inner wall of the valve body 20 where the first passage 21 is located, and the inner diameter of the third sealing ring 316 abuts against the bottom of the third annular groove 315, so as to achieve the sealing connection between the gas source connecting block 31 and the valve body 20. Specifically, the air inlet interface mounting plate 34 is mounted on the valve body 20 through the screw 28, the air inlet opening 341 is integrally formed or machined on the air inlet interface mounting plate 34, the diameter of the air inlet opening 341 is smaller than the outer diameter of the air source connecting block 31 and is smaller than the outer diameter of the sealing ring closest to the air inlet opening 341, so that the sealing ring is prevented from sliding out of the air inlet opening 341, and the air inlet opening 341 is set to be larger than the outer diameter of the external gas source, so that the connection between the air source connecting block 31 and the external gas source is prevented from being blocked.
Preferably, in order to facilitate the installation of the first and second connection blocks 32 and 33, as shown in fig. 16, the first channel 21 includes a first connection block accommodating cavity 212 for accommodating the first connection block 32, a second connection block accommodating cavity 213 for accommodating the second connection block 33, and a first gas on-off switch accommodating cavity for accommodating the first gas on-off switch 40, which are sequentially communicated, the diameter of the first connection block accommodating cavity 212 is larger than that of the second connection block accommodating cavity 213, and the diameter of the second connection block accommodating cavity 213 is larger than that of the first gas on-off switch accommodating cavity, so that when the first and second connection blocks 32 and 33 are installed on the valve body 20, the outer diameter of the third sealing ring 316, which is sleeved between the first and second connection blocks 32 and 33, may abut against the inner wall of the second connection block accommodating cavity 213 of the valve body 20.
In other embodiments, the gas source connecting block 31 may be connected to the valve body 20 by a screw connection, so that the outer diameter of the third sealing ring 316 abuts against the inner wall (not shown) of the valve body 20 where the first channel 21 is located.
In this embodiment, it is preferable that the first connecting block 32 is made of zinc alloy and the second connecting block 33 is made of aluminum alloy. Because the first connecting block 32 is made of zinc alloy, the connecting block has certain strength and corrosion resistance, the first connecting block 32 is convenient to be connected with the valve body 20 and an external fuel gas source, and the service life of the first connecting block 32 is ensured; the second connecting block 33 is made of aluminum alloy, so that the second connecting block 33 has certain strength, and the weight of the second connecting block 33 is reduced.
In the present embodiment, as shown in fig. 6 to 8, the first gas on-off switch 40 includes: a slide rod 41 fitted in the first channel 21, the slide rod 41 being slidably disposed in the first channel 21, a fourth annular groove 411 and a fifth annular groove 412 being integrally formed or machined on the outer periphery of the slide rod 41; a fourth seal ring 42 filled in the fourth annular groove 411, a fifth seal ring 43 filled in the fifth annular groove 412, the fifth seal ring 43 fitting with the first passage 21; a first elastic member 44 disposed on the sliding rod 41, wherein the first elastic member 44 is disposed along a direction in which the fuel gas flows in the first channel 21, that is, along an axial direction of the first channel 21, one end of the first elastic member 44 abuts against the sliding rod 41, and the other end abuts against the valve body 20; the first elastic member 44 has a first compression state corresponding to the first off-state, a second compression state corresponding to the second off-state, and a third compression state corresponding to the first on-state; the fourth seal ring 42 and the fifth seal ring 43 are arranged such that when the first resilient member 44 is in the first, second and third compressed states, the fourth seal ring 42 is located on a side of the second passage 22 that is adjacent to the air supply interface 30, the fifth seal ring 43 is located on a side of the second passage 22 that is remote from the air supply interface 30, and the fourth seal ring 42 is further arranged such that when the first resilient member 44 is in the first compressed state, the fourth seal ring 42 abuts against the air supply interface 30, when the first resilient member 44 is in the second compressed state, the fourth seal ring 42 is in clearance fit with the first passage 21 of the valve body 20, and when the first resilient member 44 is in the third compressed state, the fourth seal ring 42 is fitted with the first passage 21. Due to the arrangement of the first elastic member 44, the fourth sealing ring 42 and the fifth sealing ring 43, when the first elastic member 44 is in the first compression state, as shown in fig. 6, the fourth sealing ring 42 abuts against the air supply interface 30, at this time, the fourth sealing ring 42 blocks the air inlet channel 301 from the transition cavity 401, so as to keep the interior of the transition cavity 401 clean, and when the air supply interface 30 includes the air supply connection block 31, and the air supply connection block 31 includes the first connection block 32 and the second connection block 33, the fourth sealing ring 42 abuts against the annular flange 332 of the second connection block 33; when the first elastic member 44 is in the second compression state, an external gas source connected to the gas source connecting block 31 abuts against the sliding rod 41, the sliding rod 41 is pressed to compress the first elastic member 44, the sliding rod 41 moves towards one side away from the gas source interface 30 along the axis of the gas inlet channel 301, as shown in fig. 7, the fourth sealing ring 42 is separated from the gas source connecting block 31, the transition cavity 401 is communicated with the gas inlet channel 301, at this time, gas introduced through the gas inlet channel 301 can enter the transition cavity 401, sequentially pass through the second channel 22 and the decompression cavity 23, and finally is discharged through the exhaust channel 26; when the first elastic member 44 is in the third compressed state, the air pressure introduced into the transition cavity 401 further presses the sliding rod 41, so that the first elastic member 44 is further compressed and contracted, the axis of the sliding rod 41 further moves towards the side of the air channel 301 away from the air source interface 30, as shown in fig. 8, the fourth sealing ring 42 blocks the air channel 301 from the transition cavity 401, and the gas pressure in the transition cavity 401 is prevented from being too high.
Preferably, in order to facilitate the installation of the sliding rod 41, as shown in fig. 16, the first channel 21 further includes a first sliding rod accommodating cavity 214 communicated with the second connecting block accommodating cavity 213 and a second sliding rod accommodating cavity 215 communicated with the second connecting block accommodating cavity 213 through the first sliding rod accommodating cavity 214, the first sliding rod accommodating cavity 214 and the second sliding rod accommodating cavity 215 enclose a first gas on-off switch accommodating cavity for accommodating the first gas on-off switch 40, the first sliding rod accommodating cavity 214 is adapted to the fourth sealing ring 42, the second sliding rod accommodating cavity 215 is adapted to the fifth sealing ring 43, the first sliding rod accommodating cavity 214 has a diameter smaller than that of the second connecting block accommodating cavity 213, a transition region is provided between the first sliding rod accommodating cavity 214 and the second connecting block accommodating cavity 213, the diameter of the transition region is gradually reduced from the second connecting block accommodating cavity 213 to the first sliding rod accommodating cavity 214, and the diameters of the two ends are respectively equal to the diameters of the first sliding rod accommodating cavity 214 and the second connecting block accommodating cavity 213, the diameter of the slide bar second accommodating cavity 215 is smaller than that of the slide bar first accommodating cavity 214, so that the first connecting block accommodating cavity 212, the second connecting block accommodating cavity 213, the slide bar first accommodating cavity 214 and the slide bar second accommodating cavity 215 can be machined at one time in a machining or die forming mode; moreover, because the diameter of the transition area is gradually reduced from the second connecting block accommodating cavity 213 to the first sliding rod accommodating cavity 214, when the gas pressure of the transition cavity 401 is greater than the first limit pressure, the sliding rod 41 slides along the first channel 21 in the direction away from the gas source interface 30 under the action of the gas pressure, so that the fourth annular groove 411 slides into the first sliding rod accommodating cavity 214, the fourth sealing ring 42 blocks the transition cavity 401 from the gas inlet channel 301, and at this time, due to the movement of the sliding rod 41, the first elastic member 44 is in the third compression state. The fifth sealing ring 43 is fitted in the sliding rod second accommodating chamber 215, when the first gas on-off switch 40 is in the second off state, the fourth sealing ring 42 is fitted in the sliding rod first accommodating chamber 214 to block the transition chamber 401 from the air intake passage 301, when the first gas on-off switch 40 is in the other state, the fourth sealing ring 42 is located outside the sliding rod first accommodating chamber 214 and in the transition area or the second connecting block accommodating chamber 213, at this time, the transition chamber 401 is communicated with the air intake passage 301.
Further, as shown in fig. 6 to 9 and 13, a sliding rod extension port 29 for communicating the first channel 21 with the outside is integrally formed or machined on the valve body 20, and the sliding rod extension port 29 and the sliding rod 41 are coaxially arranged and are arranged at one end of the valve body 20 far away from the air source interface 30; a positioning clamping groove 413 is integrally formed or machined on the outer diameter of the sliding rod 41, the positioning clamping groove 413 is arranged on one side, away from the air source interface 30, of the fifth annular groove 412, one end, away from the air source interface 30, of the positioning clamping groove 413 is integrally formed or connected with an end head 414, the end head 414 is set to extend out of the sliding rod extension port 29 in a first disconnecting state, a second disconnecting state and a first opening state, and the positioning clamping groove 413 is set to extend out of the valve body 20 from the sliding rod extension port 29 in the second disconnecting state; the valve body 20 is further provided with a limit switch 60 having a driving mechanism, and the limit switch 60 is disposed to abut against the outer diameter of the slide rod 41 under the driving of the driving mechanism. Therefore, when the first gas on-off switch 40 is in the second off state, the positioning slot 413 of the sliding rod 41 can extend from the sliding rod extension port 29, then the limit switch 60 is abutted against the positioning slot 413 of the sliding rod 41 under the driving of the driving mechanism thereof so as to prevent the positioning slot 413 on the sliding rod 41 from retracting into the first channel 21, so that the first gas on-off switch 40 keeps the second off state, and when the air pressure of the gas entering the transition cavity 401 fluctuates up and down at the first limit pressure, the first gas on-off switch 40 repeatedly changes between the second off state and the first off state or the first on state, so that the safety and the stability of the gas valve for the gas furnace are reduced; by arranging the limit switch 60, the gas pressure in the transition cavity 401 is further prevented from being too high, and the safety of the gas valve for the gas furnace is further ensured; the limit switch 60 can be driven by a human-operated driving mechanism to move towards the side away from the sliding rod 41, so that the positioning clamping groove 413 on the sliding rod 41 retracts into the first channel 21, and the gas valve for the gas stove can be continuously used.
Preferably, as shown in fig. 13, the end of the sliding rod 41 facing the air supply port 30 is integrally formed, connected or machined with an air supply contact 45. When the external gas source is connected with the gas source interface 30 in a sealing manner, the external gas source applies pressure to the gas source contact 45, so that the sliding rod 41 moves towards the direction departing from the gas source interface 30, the first elastic piece 44 is compressed, the fourth sealing ring 42 is separated from the gas source interface 30, the gas inlet channel 301 is communicated with the transition cavity 401, and gas can enter the transition cavity 401 through the gas inlet channel 301.
Specifically, as shown in fig. 3 to 5, 10, and 13, the limit switch 60 includes: the limiting block 61 can be pivotally connected to the valve body 20, the pivotal connection mode can be realized by processing a through hole on the limiting block 61, installing the limiting block on the valve body 20 through a bolt, and adopting other pivotal connection modes in the prior art, the utility model does not limit the pivotal connection mode, and the pivotal axis of the limiting block 61 is parallel to the first channel 21; the limiting block 61 is integrally formed or processed with an arc-shaped groove 611 coaxially arranged with a pivot shaft thereof; the torsion spring 62 is sleeved on the valve body 20, the torsion spring 62 is coaxially arranged with a pivot shaft of the limiting block 61, and the torsion spring 62 is arranged to drive the limiting block 61 to abut against the outer diameter of the sliding rod 41, so that the torsion spring 62 forms a driving mechanism; the valve body 20 is further provided with a positioning block 63 at a position corresponding to the arc-shaped groove 611, and the positioning block 63 is provided as a cylindrical protrusion adapted to the groove width of the arc-shaped groove 611. Therefore, under the driving of the torsion spring 62, the limiting block 61 is abutted against the sliding rod 41; when the first gas on-off switch 40 is in the second off state, the positioning slot 413 extends from the sliding rod extension port 29 to the outside of the valve body 20, the limiting block 61 abuts against the positioning slot 413 under the driving of the torsion spring 62, under the driving of no external force, even if the air pressure in the transition chamber 401 is lower than the first limit pressure, the positioning slot 413 cannot retract into the first channel 21, the limiting block 61 needs to be rotated in the direction away from the sliding rod 41 by a person or other driving mechanism, at this time, pressure is applied to the torsion spring 62, and if the air pressure in the transition chamber 401 is lower than the first limit pressure, under the action of the first elastic member 44, the sliding rod 41 moves towards the gas source interface 30 until the positioning slot 413 moves into the first channel 21.
In the present embodiment, as shown in fig. 11, 12, 17 and 18, the valve body 20 is further integrally formed or machined with a third passage 24 and a gas flow regulating chamber 25 which are communicated with each other; the exhaust passage 26 is communicated with the decompression chamber 23 through the gas flow rate adjusting chamber 25 and the third passage 24 in sequence; the gas flow rate adjustment chamber 25 is provided with a flow rate adjustment device 70 for adjusting the flow rate of the gas flowing from the third passage 24 into the exhaust passage 26. Therefore, the gas flow rate adjusting device 70 can adjust the size of the gas discharged from the exhaust passage 26, and the gas flow rate adjusting device 70 can be used more conveniently, and can also be used as a gas discharge switch of a gas valve for a gas furnace, so that the discharge amount of the gas flow rate adjusting device 70 is adjusted to zero, namely, the exhaust passage 26 is closed.
Specifically, as shown in fig. 11, 12, 17 and 18, the third passage 24 communicates with the decompression chamber 23 through a fourth opening 241 formed or machined on the inner wall of the decompression chamber 23 of the valve body 20, the gas flow rate adjustment chamber 25 communicates with the gas discharge passage 26 through a fifth opening 251 formed or machined on the inner wall of the gas flow rate adjustment chamber 25 of the valve body 20, the gas flow rate adjustment chamber 25 further communicates with the outside through a flow rate adjustment chamber opening 252 formed or machined on the surface of the valve body 20, and the flow rate adjustment device 70 can be installed into the gas flow rate adjustment chamber 25 through the flow rate adjustment chamber opening 252. Preferably, the third channel 24 is perpendicular to the second channel 22, the exhaust channel 26 is perpendicular to the third channel 24, and the third channel 24 is coaxial with the gas flow regulating cavity 25, so as to facilitate the processing of the third channel 24 and the exhaust channel 26.
As shown in fig. 11 to 13, the flow rate adjustment device 70 includes: a barrel-shaped sealing sleeve 71 which is non-rotatably sleeved in the gas flow regulating cavity 25, wherein the sealing sleeve 71 is provided with an accommodating cavity 711 with an opening, a first sealing sleeve through hole 712 for communicating the third channel 24 with the accommodating cavity 711 is integrally formed or machined at the bottom of the sealing sleeve 71, the first sealing sleeve through hole 712 is eccentrically arranged, and a second sealing sleeve through hole 713 for communicating the accommodating cavity 711 with the exhaust channel 26 is integrally formed or machined on the side wall of the sealing sleeve 71; the adjusting head 72 is rotatably sleeved in the accommodating cavity 711, the adjusting head 72 comprises an adjusting part 724 matched in the accommodating cavity 711 and an adjusting handle 723 positioned outside the accommodating cavity 711, the adjusting part 724 is integrally formed or machined with a first adjusting head through hole 721 corresponding to the first sealing sleeve through hole 712 and a second adjusting head through hole 722 corresponding to the second sealing sleeve through hole 713, and the first adjusting head through hole 721 is communicated with the second adjusting head through hole 722; the adjusting device comprises an adjusting device mounting plate 73 detachably and fixedly connected to the valve body 20 and a second elastic piece 74 arranged between the adjusting device mounting plate 73 and an adjusting head 72, wherein an adjusting head penetrating hole 731 for an adjusting handle 723 to extend out is arranged on the adjusting device mounting plate 73, one end of the second elastic piece 74 abuts against the adjusting device mounting plate 73, and the other end of the second elastic piece abuts against an adjusting part 724. Because the first seal gland through hole 712 and the first adjusting head through hole 721 are eccentrically arranged, in the process of rotating the adjusting head 72, when the first adjusting head through hole 721 is not communicated with the first seal gland through hole 712, the gas in the third passage 24 is not discharged to the exhaust passage 26 through the flow regulating device 70, and at this time, the flow regulating device 70 is equivalent to closing the exhaust passage 26; when the adjusting head 72 is rotated until the first adjusting head through hole 721 corresponds to the first seal sleeve through hole 712 and the second adjusting head through hole 722 corresponds to the second seal sleeve through hole 713, the gas quantity discharged from the third passage 24 into the exhaust passage 26 through the flow regulating device 70 is the largest; when the adjusting head 72 is rotated until the first adjusting head through hole 721 is staggered with the first sealing sleeve through hole 712 and the second adjusting head through hole 722 is staggered with the second sealing sleeve through hole 713, the amount of gas discharged from the third passage 24 into the exhaust passage 26 through the flow rate adjusting device 70 is smaller than the maximum value, and the value thereof is increased along with the increase of the staggered area of the first adjusting head through hole 721 and the first sealing sleeve through hole 712 and the increase of the staggered area of the second adjusting head through hole 722 and the second sealing sleeve through hole 713.
In the present embodiment, the sealing sleeve 71 is non-rotatably disposed in the gas flow regulating cavity 25 as shown in fig. 13, 15, and 17 to 19, a sealing sleeve slot 253 is integrally formed or machined on an inner wall of the gas flow regulating cavity 25, a sealing sleeve rib 714 corresponding to and fitting with the sealing sleeve slot 253 is integrally formed or machined on an outer circumference of the sealing sleeve 71, and when the sealing sleeve is disposed in the gas flow regulating cavity 25, the sealing sleeve rib 714 is engaged with the sealing sleeve slot 253 to limit the sealing sleeve 71 from rotating relative to the gas flow regulating cavity 25.
In other embodiments, the sealing sleeve 71 is non-rotatably disposed in the gas flow regulating cavity 25, and the gas flow regulating cavity 25 is configured as a non-rotating structure, and the sealing sleeve 71 is fitted in the gas flow regulating cavity 25, and at this time, the sealing sleeve 71 cannot rotate relative to the gas flow regulating cavity 25 (not shown in the figure).
In this embodiment, the adjusting head 72 is rotatably sleeved in the accommodating cavity 711, as shown in fig. 11 to 13, 20 and 21, a cavity of the accommodating cavity 711 is a revolving structure, such as a cylinder, a circular truncated cone or a cone, the adjusting portion 724 of the adjusting head 72, which is fitted in the accommodating cavity 711, is fitted with the shape of the accommodating cavity 711, so that the adjusting head 72 can rotate relative to the accommodating cavity 711, and the rotation axis is parallel to the axis of the third channel 24.
Preferably, as shown in fig. 4, 10, 13 and 20, an indication mark 725 is integrally formed or machined at the free end of the adjusting handle 723, the indication mark 725 may be in the form of a clamping groove or a protrusion, the indication mark 725 is located on the same side as the second adjusting head through hole 722, when the adjusting head 72 is rotated to the side where the indication mark 725 is located on the exhaust passage 26, the second adjusting head through hole 722 corresponds to the second sealing sleeve through hole 713, at this time, the amount of gas discharged to the exhaust passage 26 from the third passage 24 through the flow regulating device 70 is the largest, when the adjusting head 72 is rotated to the side where the indication mark 725 is located away from the exhaust passage 26, the second adjusting head through hole 722 is completely staggered from the second sealing sleeve through hole 713, at this time, the third passage 24 cannot discharge gas into the exhaust passage 26 through the flow regulating device 70, and when the adjusting head 72 is rotated, the indication mark 725 is rotated from the side where the exhaust passage 26 is located to the side where the exhaust passage 26 is located The amount of gas discharged into the exhaust passage 26 from the third passage 24 through the flow rate adjustment device 70 gradually decreases, and the amount of gas discharged into the exhaust passage 26 from the third passage 24 through the flow rate adjustment device 70 gradually increases during the rotation of the indicator 725 from the side away from the exhaust passage 26 to the side where the exhaust passage 26 is located. Thus, the adjustment position of the flow rate adjustment device 70 can be observed by the indication mark 725, which facilitates grasping the flow rate adjustment.
In the present embodiment, as shown in fig. 1 and 2, it is preferable that the valve body 20 is further provided with an ignition device 80 for igniting the gas discharged from the exhaust passage 26. Therefore, when the gas discharged from the exhaust passage 26 needs to be ignited, the gas can be ignited by the ignition device 80 of the gas valve, and the gas stove is convenient to use.
Specifically, as shown in fig. 1 and 2, the ignition device 80 includes a piezoelectric ceramic type ignition mechanism 81 commonly used in the prior art, the piezoelectric ceramic is connected to an ignition head 811 through a power line, the ignition head 811 can generate sparks by pressing the piezoelectric ceramic type ignition mechanism 81, and then the sparks of the ignition head 811 ignite the gas discharged from the exhaust passage 26. In order to facilitate the installation of the piezoelectric ceramic type ignition mechanism 81, an ignition mechanism mounting groove 732 is integrally formed or machined on the adjustment device mounting plate 73, the piezoelectric ceramic type ignition mechanism 81 is placed in the ignition mechanism mounting groove 732, and then, the ignition mechanism mounting plate 82 is detachably connected to the adjustment device mounting plate 73 so as to press the piezoelectric ceramic type ignition mechanism 81 between the ignition mechanism mounting plate 82 and the adjustment device mounting plate 73. Preferably, the striking mechanism mounting plate 82 is further pivotally connected with a pressing plate 83, and the pressing of the piezoelectric ceramic striking mechanism 81 can be realized by rotating the pressing plate 83.
In order to facilitate the discharge of the gas from the gas discharge passage 26 to the distributor of the gas burner, as shown in fig. 1 and 2, the gas valve for a gas burner further includes an exhaust pipe 264, the exhaust pipe 264 being detachably and hermetically connected to the gas discharge passage 26, and the exhaust pipe 264 having an exhaust port 265 therein for communicating the gas discharge passage 26 with the outside. The specific implementation manner of the sealing connection between the exhaust pipe 264 and the exhaust channel 26 is as shown in fig. 3, 4, 12 and 13, a sixth sealing ring 262 is fitted in the exhaust channel 26, the inner diameter of the sixth sealing ring 262 is fitted with the exhaust pipe 264, a protrusion is integrally formed, machined or connected to the exhaust pipe 264, one end of the exhaust pipe 264 passes through the sixth sealing ring 262 and is inserted into the exhaust channel 26, an exhaust pipe through hole 266 through which the exhaust pipe 264 passes is integrally formed or machined on the exhaust pipe mounting plate 263, the exhaust pipe 264 is placed in the exhaust pipe through hole 266, the exhaust pipe mounting plate 263 is fixed on the valve body 20, and the protrusion of the exhaust pipe 264 is pressed against the sixth sealing ring 262, so as to achieve the sealing connection between the exhaust pipe 264 and the exhaust.
In the present embodiment, the second gas on-off switch 50 is implemented as shown in fig. 6 to 9 and 13, the second gas on-off switch 50 includes a pressure reducing cover 51 pivotably provided on the valve body 20, the pressure reducing cover 51 includes a pressure reducing portion 511 and a pressure reducing lever 514, pressure reducing portion pivot shafts 513 are provided on both sides of the pressure reducing cover 51, the pressure reducing portion pivot shafts 513 are pivotably provided on the valve body 20, specifically, pivot shaft installation grooves 233 adapted to the pressure reducing portion pivot shafts 513 are integrally formed or machined on an inner wall of the valve body 20 located in the pressure reducing chamber 23, installation screw holes 27 are further machined on the inner wall of the valve body 20 located in the pressure reducing chamber 23, the pressure reducing portion pivot shafts 513 can be restricted from moving out of the pivot shaft installation grooves 233 when screws 28 are installed in the installation screw holes 27, a seal block 512 is provided on the pressure reducing portion 511 at a position corresponding to the third opening 231, an axis of the pressure reducing portion pivot shafts 513 is, the decompression rod 514 is arranged perpendicular to the decompression part pivot shaft 513, the decompression rod 514 is pivotally connected with the connecting rod 52, the connecting rod 52 is connected with the connecting cover 54, the sealing cover 53 is clamped between the connecting rod 52 and the connecting cover 54, the decompression rod 514 and the connecting rod 52 are pivotally connected in a way that a decompression rod through hole 522 which is matched with the decompression rod 514 and is used for the decompression rod 514 to pass through is arranged on the connecting rod 52, the connecting rod 52 and the connecting cover 54 are connected in a way that a screw 521 is processed or connected on the connecting rod 52, the screw 521 passes through the sealing cover 53, the connecting cover 54 and a washer 541 and then is in threaded connection with a nut 542, the sealing cover 53 is pressed on the valve body 20 through the decompression cavity mounting cover 56 to avoid the gas leakage from the decompression cavity opening 232, in a way that the sealing cover 53 is mounted on the valve body 20 through a screw 28 and the sealing cover 53 is, at this time, the connecting rod 52 connected to the connecting cover 54 rotates the decompression rod 514 to separate the decompression cover 51 from the third opening 231, and the second passage 22 communicates with the decompression chamber 23; a third elastic member 55 is provided between the connection cover 54 and the decompression chamber installation cover 56, the third elastic member 55 having an initial compression state in which the third elastic member 55 is pressed by the decompression chamber installation cover 56 and a final compression state in which it drives the decompression cover 51 to be separated from the third opening 231 through the connection cover 54 and the connection rod 52; in the final compression state, the pressure of the decompression chamber 23 is greater than the second limit pressure, the gas pressure presses the third elastic member 55 through the connecting cover 54, the third elastic member 55 is further compressed, the connecting cover 54 drives the connecting rod 52 to move upwards, and drives the decompression cover 51 to rotate, so that the sealing block 512 abuts against the third opening 231, and the second channel 22 is blocked from the decompression chamber 23.
The first limit pressure and the second limit pressure can be set according to requirements, the pressure range of the general first limit pressure can be 0.55MPa-0.6MPa, and the range of the second limit pressure can be 0.45MPa-0.55MPa, or can be selected according to requirements. The model that specific pressure value can be controlled through selecting the elastic component, and suitable elastic component model can be selected through the experiment of commonly used to specific mode of setting, the utility model discloses do not do the injecing to the specific mode of setting of extreme pressure.
Preferably, the first elastic member 44, the second elastic member 74 and the third elastic member 55 are compression springs.
Preferably, the material of the sealing sleeve 71, the sealing block 512 and the sealing cover 53 is the same as that of the sealing ring.
In other embodiments, the second gas on-off switch 50 may also adopt a structure of a pressure adjusting device in a magnetic-attraction type safety explosion-proof cassette gas valve disclosed in utility model with publication No. CN 204042436U. Other pressure adjusting devices for adjusting the pressure in the decompression chamber 23 may also be used in the prior art, and the present invention does not limit the specific structure of the second gas on/off switch 50 for adjusting the pressure in the decompression chamber 23.
Can dismantle and connect can use threaded connection or buckle connection etc. commonly used among the prior art and can dismantle the connected mode and realize, the utility model discloses do not do the injecing to the concrete implementation who can dismantle the connection.
What has been described above are only some embodiments of the invention. For those skilled in the art, without departing from the inventive concept, several modifications and improvements can be made, which are within the scope of the invention.

Claims (10)

1. Gas valve for gas stove, its characterized in that includes:
the valve body (20), the said valve body (20) is equipped with the first channel (21), the second channel (22), the decompression chamber (23) and the exhaust passage (26) that communicate sequentially;
the gas source interface (30) is arranged on the valve body (20) and used for being detachably and hermetically connected with an external gas source, the gas source interface (30) is provided with a gas inlet channel (301), and the gas inlet channel (301) is arranged to communicate the first channel (21) with the outside;
the first gas on-off switch (40) is slidably arranged in the first channel (21), the first gas on-off switch (40) and the first channel (21) enclose a transition cavity (401), the first gas on-off switch (40) has a first off state corresponding to the condition that the gas source interface (30) is not connected with an external gas source, a second off state corresponding to the condition that the gas pressure of gas introduced into the transition cavity (401) is greater than a set first limit pressure and a first on state corresponding to the condition that the gas pressure of gas introduced into the transition cavity (401) is less than the set first limit pressure, the first gas on-off switch (40) is arranged in such a way that in the first off state and the second off state, the transition cavity (401) is communicated with the second channel (22) and is not communicated with the gas inlet channel (301), and in the first on state, the second passage (22) is communicated with the air inlet passage (301) through the transition cavity (401);
a second gas on-off switch (50) provided on the valve body (20), the second gas on-off switch (50) having a third off state corresponding to when the gas pressure of the gas introduced into the decompression chamber (23) is greater than a set second limit pressure and a second on state in other states, the second gas on-off switch (50) being configured to disconnect the decompression chamber (23) from the second passage (22) in the third off state and communicate the decompression chamber (23) with the second passage (22) in the second on state;
the air source interface (30) and the first air on-off switch (40) are coaxially arranged.
2. Gas valve for gas furnaces according to claim 1, characterized in that the gas source interface (30) comprises a gas source connection block (31) for detachable connection with an external gas source;
the air inlet channel (301) is arranged in the air source connecting block (31);
the inner wall, provided with the air inlet channel (301), of the air source connecting block (31) is also provided with a first annular groove (311) and a second annular groove (312) which are coaxially arranged with the air inlet channel (301), and sealing rings matched with an external fuel gas source are filled in the first annular groove (311) and the second annular groove (312);
a third annular groove (315) is formed in the periphery of the gas source connecting block (31), and a third sealing ring (316) is filled in the third annular groove (315);
the gas source connecting block (31) is installed on the valve body (20) and arranged in the first channel (21), and the outer diameter of the third sealing ring (316) abuts against the inner wall, provided with the first channel (21), of the valve body (20), so that the transition cavity (401) is not communicated with the outside in the first disconnecting state and the second disconnecting state.
3. Gas valve for gas furnaces according to claim 2, characterised in that the gas source connection block (31) comprises a first connection block (32) and a second connection block (33);
the first connecting block (32) is provided with a first gas channel (321) communicated with the outside and a second gas channel (322) communicated with the first gas channel (321) and a second connecting block (33), the second connecting block (33) is provided with a third gas channel (331) communicated with the second gas channel (322) and a first gas on-off switch (40), the periphery of the second connecting block is provided with an annular flange (332), and the first gas channel (321), the second gas channel (322) and the third gas channel (331) jointly form the gas inlet channel (301);
the second connecting block (33) is arranged in the second gas channel (322), the first connecting block (32) is arranged on the valve body (20), the annular flange (332) is arranged outside the second gas channel (322), and the first connecting block (32) and the second connecting block (33) enclose the third annular groove (315);
the first annular groove (311) and the second annular groove (312) are provided on the first connecting block (32).
4. Gas valve for gas furnaces according to claim 3, characterised in that the first connecting block (32) is made of zinc alloy and the second connecting block (33) is made of aluminium alloy.
5. Gas valve for gas furnaces according to any of the claims 1 to 4, characterised in that the first gas on-off switch (40) comprises:
a slide bar (41) fitted in the first channel (21), a fourth annular groove (411) and a fifth annular groove (412) being provided on the outer periphery of the slide bar (41);
-a fourth sealing ring (42) filled in said fourth annular groove (411), -a fifth sealing ring (43) filled in said fifth annular groove (412), said fifth sealing ring (43) being adapted to said first channel (21);
the first elastic piece (44) is arranged on the sliding rod (41), the first elastic piece (44) is arranged along the flowing direction of the fuel gas in the first channel (21), one end of the first elastic piece (44) abuts against the sliding rod (41), and the other end of the first elastic piece (44) abuts against the valve body (20);
the first elastic member (44) has a first compressed state corresponding to the first off-state, a third compressed state corresponding to the second off-state, and a second compressed state corresponding to the first on-state;
the fourth sealing ring (42) and the fifth sealing ring (43) are arranged such that when the first elastic member (44) is in the first compression state and the second compression state, the fourth sealing ring (42) is located on the side of the second passage (22) close to the air supply interface (30), the fifth sealing ring (43) is located on the side of the second passage (22) away from the air supply interface (30), and the fourth sealing ring (42) is further arranged such that when the first elastic member (44) is in the first compression state, the fourth sealing ring (42) abuts against the air supply interface (30), when the first elastic member (44) is in the second compression state, the fourth sealing ring (42) is in clearance fit with the first passage (21) of the valve body (20), and when the first elastic member (44) is in the third compression state, the fourth sealing ring (42) is adapted to the first channel (21).
6. The gas valve for the gas furnace according to claim 5, wherein the valve body (20) is further provided with a sliding rod extension port (29) for communicating the first channel (21) with the outside, the sliding rod extension port (29) and the sliding rod (41) are coaxially arranged and are arranged at one end of the valve body (20) far away from the gas source interface (30);
a positioning clamping groove (413) is further formed in the outer diameter of the sliding rod (41), the positioning clamping groove (413) is formed in one side, away from the air source interface (30), of the fifth annular groove (412), an end head (414) is arranged at one end, away from the air source interface (30), of the positioning clamping groove (413), the end head (414) is set to extend out of the sliding rod extension port (29) in a first disconnecting state, a second disconnecting state and a first opening state, and the positioning clamping groove (413) is set to extend out of the valve body (20) from the sliding rod extension port (29) in the second disconnecting state;
the valve body (20) is further provided with a limit switch (60) with a driving mechanism, and the limit switch (60) is arranged to abut against the outer diameter of the sliding rod (41) under the driving of the driving mechanism.
7. Gas valve for gas furnaces according to claim 6, characterised in that the limit switch (60) comprises:
a limiting block (61) which can be connected to the valve body (20) in a pivoting manner, wherein an arc-shaped groove (611) which is coaxial with a pivoting shaft of the limiting block (61) is arranged on the limiting block (61);
the torsion spring (62) is sleeved on the valve body (20), the torsion spring (62) and a pivot shaft of the limiting block (61) are coaxially arranged, and the torsion spring (62) is arranged to drive the limiting block (61) to abut against the outer diameter of the sliding rod (41) so that the torsion spring (62) forms a driving mechanism;
the valve body (20) is further provided with a positioning block (63) at a position corresponding to the arc-shaped groove (611), and the positioning block (63) is arranged to be a cylindrical protrusion matched with the groove width of the arc-shaped groove (611).
8. The gas valve for gas furnaces as claimed in claim 6, characterised in that the valve body (20) is further provided with a third channel (24) and a gas flow regulating chamber (25) communicating with each other;
the exhaust channel (26) is communicated with the decompression cavity (23) through the gas flow regulating cavity (25) and the third channel (24) in sequence;
and a flow regulating device (70) for regulating the flow of the gas flowing into the exhaust channel (26) from the third channel (24) is arranged in the gas flow regulating cavity (25).
9. Gas valve for gas furnaces according to claim 8, characterised in that said flow regulating means (70) comprise:
the gas flow regulating device comprises a barrel-shaped sealing sleeve (71) which is sleeved in the gas flow regulating cavity (25) in a non-rotatable manner, wherein the sealing sleeve (71) is provided with an accommodating cavity (711) with an opening, the bottom of the sealing sleeve (71) is provided with a first sealing sleeve through hole (712) which is used for communicating the third channel (24) with the accommodating cavity (711), the first sealing sleeve through hole (712) is arranged in an eccentric manner, and the side wall of the sealing sleeve (71) is provided with a second sealing sleeve through hole (713) which is used for communicating the accommodating cavity (711) with the exhaust channel (26);
the adjusting head (72) is rotatably sleeved in the accommodating cavity (711), the adjusting head (72) comprises an adjusting part (724) matched in the accommodating cavity (711) and an adjusting handle (723) positioned outside the accommodating cavity (711), the adjusting part (724) is provided with a first adjusting head through hole (721) corresponding to the first sealing sleeve through hole (712) and a second adjusting head through hole (722) corresponding to the second sealing sleeve through hole (713), and the first adjusting head through hole (721) is communicated with the second adjusting head through hole (722);
can dismantle fixed connection adjusting device mounting panel (73) on valve body (20) and locate second elastic component (74) between adjusting device mounting panel (73) and adjusting head (72), be equipped with the confession on adjusting device mounting panel (73) adjusting head that adjustment handle (723) stretches out passes through hole (731), the one end of second elastic component (74) supports and leans on adjusting device mounting panel (73), and the other end supports and leans on adjusting portion (724).
10. Gas valve for gas furnaces according to claim 9, characterised in that the valve body (20) is also provided with ignition means (80) for igniting the gas discharged from the exhaust channel (26).
CN201920876713.2U 2019-06-11 2019-06-11 Gas valve for gas stove Active CN210153293U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920876713.2U CN210153293U (en) 2019-06-11 2019-06-11 Gas valve for gas stove

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920876713.2U CN210153293U (en) 2019-06-11 2019-06-11 Gas valve for gas stove

Publications (1)

Publication Number Publication Date
CN210153293U true CN210153293U (en) 2020-03-17

Family

ID=69762544

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920876713.2U Active CN210153293U (en) 2019-06-11 2019-06-11 Gas valve for gas stove

Country Status (1)

Country Link
CN (1) CN210153293U (en)

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