CN111473368B - Safety device for gas stove - Google Patents
Safety device for gas stove Download PDFInfo
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- CN111473368B CN111473368B CN201910066094.5A CN201910066094A CN111473368B CN 111473368 B CN111473368 B CN 111473368B CN 201910066094 A CN201910066094 A CN 201910066094A CN 111473368 B CN111473368 B CN 111473368B
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- gas
- unit
- shaft
- hole
- air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- F24C3/00—Stoves or ranges for gaseous fuels
- F24C3/12—Arrangement or mounting of control or safety devices
- F24C3/122—Arrangement or mounting of control or safety devices on stoves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Feeding And Controlling Fuel (AREA)
Abstract
A safety device of a card type gas stove is suitable for detachably connecting a gas tank to supply gas, and comprises a base body unit, an air tap unit and a safety unit. The seat body unit defines an air outlet chamber, a first accommodating groove communicated with the air chamber and a second accommodating groove communicated with the first accommodating groove. The air tap unit comprises a magnetic ring arranged outside the second accommodating groove, a push pipe movably arranged in the second accommodating groove, and a valve shaft movably arranged in the push pipe in a penetrating mode. The safety unit includes a shaft movably mounted in the first vessel. When the air pressure is too high, on one hand, the shaft rod can be driven by high-pressure air to automatically block the passage between the first containing groove and the air chamber, and on the other hand, the valve shaft can also be driven by the high-pressure air to drive the push pipe to push the gas tank away, so that the supply of the gas is interrupted, and double safety protection is formed to avoid accidents.
Description
Technical Field
The present invention relates to a gas burner, and more particularly, to a safety device for a gas burner which is installed in a gas burner and prevents excessive gas pressure.
Background
In recent years, card type gas stoves have been widely used in various applications requiring cooking and roasting because of their light weight and portability. However, in the cassette gas stove, a gas tank must be installed to supply a gas such as gas for a burner to be used as fuel, but when the cassette gas stove is used for combustion, unsafe factors such as fire or explosion caused by gas leakage or excessive pressure are often accompanied, and dangerous accidents are easily caused. Therefore, a safety device is usually installed between the gas can and the burner to prevent the accidents.
The safety device developed in the industry at present can be classified into two types, i.e., a detachable type and a magnetic type, if the safety device is combined with the gas tank, and can be roughly classified into three types, i.e., the safety device can automatically block a gas flow path and interrupt gas supply when the gas pressure is too high, e.g., the safety device of the card type gas stove disclosed in taiwan patent No. M342484, the safety device can automatically push the gas tank open to interrupt gas supply when the gas pressure is too high, e.g., the safety structure of the card type gas stove disclosed in taiwan patent No. 240800, and the third type is a gas regulator having the above two safety mechanisms, e.g., the double overpressure protection disclosed in taiwan patent No. M547079.
The present invention is designed for the magnetic-attraction type safety device with two safety mechanisms, and further provides a safety device of a cassette gas stove with an innovative structure for consumers to choose.
Disclosure of Invention
The object of the present invention is to provide a safety device for a card gas range which overcomes at least one of the drawbacks of the background art.
The safety device of the cassette gas stove of the invention is suitable for supplying gas by detachably connecting a gas tank, the safety device comprises: the gas nozzle unit comprises a magnetic ring arranged outside the second accommodating groove of the seat body unit, a push pipe movably arranged in the second accommodating groove and a valve shaft movably arranged in the push pipe in a penetrating way; the gas nozzle unit can be changed among an uninflated state, an inflated state and a safe state, the gas nozzle unit is not magnetically attracted and connected with the gas can when in the uninflated state, the magnetic ring is magnetically attracted and connected with the gas can when in the inflated state, the gas can is inserted into the push pipe and pushes the valve shaft to move forwards so that the gas flows into the first containing groove, when in the safe state, the high-pressure gas in the first containing groove forces the valve shaft to drive the push pipe to move backwards to push the gas can so that the gas can is separated from the magnetic ring and does not supply gas, and the safe unit comprises a shaft rod movably arranged in the first containing groove; the shaft rod moves between a ventilation position and an unvented position relative to the seat body unit, when the shaft rod is at the ventilation position, the gas in the first containing groove can flow into the gas chamber, and when the shaft rod is at the unvented position, the shaft rod moves outwards under the oppression of the high-pressure gas in the first containing groove, so that the gas in the first containing groove cannot flow into the gas chamber to interrupt gas supply.
In the safety device of the card type gas stove, the base body unit is further provided with a first through hole for communicating the first containing groove and the gas chamber and a second through hole for communicating the first containing groove and the second containing groove; when the shaft lever of the safety unit is in the ventilation position, the first containing groove is communicated with the first through hole, and when the shaft lever is in the non-ventilation position, the first through hole is sealed, so that the first containing groove is not communicated with the first through hole.
In the safety device for a card type gas range of the present invention, the push pipe of the air nozzle unit has a pipe hole extending in the front-rear direction and accommodating the valve shaft, the pipe hole having a tapered hole portion; when the air nozzle unit is in the non-inflation state, the valve shaft blocks and seals the inclined taper hole part of the push pipe, when the air nozzle unit is changed from the non-inflation state to the inflation state, the valve shaft is pushed by the gas tank to leave the inclined taper hole part and is matched with the push pipe to form a gap through which gas can pass, and when the air nozzle unit is in the safety state, the valve shaft blocks and seals the inclined taper hole part of the push pipe.
The safety device of the card gas stove comprises a base body unit, a gas nozzle unit, a magnetic base, a sleeve, a front ring, a rear ring, a return spring and a pushing spring, wherein the magnetic base is fixed on the base body unit and used for accommodating the magnetic ring, the sleeve is fixedly arranged in the center of the magnetic base and extends into the second accommodating groove and used for accommodating the pushing pipe, the front ring is arranged on the front side of the inner peripheral surface of the sleeve, the rear ring is arranged on the rear side of the inner peripheral surface of the sleeve, the return spring is arranged between the pushing pipe and the rear ring, and the pushing spring is arranged between the valve shaft and the base body unit; when the air nozzle unit is changed from the non-inflated state to the inflated state, the valve shaft moves forwards to compress the pushing spring, when the air nozzle unit is changed from the inflated state to the safe state, the pushing spring releases elastic force to push the valve shaft to move backwards to drive the push pipe to move backwards and compress the return spring, and when the air nozzle unit is changed from the safe state to the non-inflated state, the return spring releases elastic force to push the push pipe forwards to link the valve shaft to reset.
In the safety device of the cassette gas stove, the air nozzle unit further comprises a plurality of air seals, and the air seals are respectively arranged between the sleeve and the front ring, between the sleeve and the rear ring, between the periphery of the push pipe and the sleeve, on the rear side of the inner circumferential surface of the push pipe, and between the periphery of the valve shaft and the push pipe.
The safety device of the card type gas stove comprises a base body unit, a first plug head, a second plug head, a compression spring and a plurality of annular rings, wherein the base body unit comprises the first plug head which is plugged at one end of a first containing groove and is adjacent to a second through hole, the second plug head is installed at the other end of the first containing groove and is used for extending out of a shaft rod; when the shaft rod is at the ventilation position, the channel is communicated with the first through hole, the gas flowing into the first containing groove from the second containing groove enters the gas chamber through the channel and the first through hole, and when the shaft rod is at the non-ventilation position, the channel is not communicated with the first through hole, so that the gas in the first containing groove cannot enter the gas chamber.
The safety device of the card type gas stove comprises a shaft rod, a clamping unit and a torsion spring, wherein the shaft rod is also provided with a clamping groove which is adjacent to the second end part and is concavely arranged on the peripheral surface; when the shaft lever is located at the ventilation position, the clamping plate is abutted against the second end of the shaft lever, and when the shaft lever moves outwards to the non-ventilation position, the clamping plate swings and is partially embedded into the clamping groove of the shaft lever to be positioned through the elasticity of the torsion spring.
The safety unit of the safety device of the clamping type gas stove also comprises a rod head which is fixedly connected with one end of the shaft rod extending out of the second plug head and is positioned outside the clamping plate.
The safety device of the card gas stove comprises a base, a top cover and an air valve unit, wherein the top cover is sealed above the base, the safety device also comprises the air valve unit which is used for controlling whether the first through hole is communicated with the air chamber or not, the air valve unit comprises a valve rod which is positioned in the air chamber and is pivotally connected on the base in a swinging mode, a piston which is transversely arranged between the base and the top cover and is connected with the valve rod at the bottom, and a pressing spring which is arranged between the center of the piston and the top cover and has elasticity for pushing and pressing the piston downwards; the gas entering the gas chamber from the first through hole can push the piston and simultaneously compress the abutting spring, so that the piston upwards drives the valve rod to seal the first through hole, and the abutting spring can push the piston and the valve rod to reset after the gas is output and released.
In the safety device of the card type gas stove, the base body unit further defines a third containing groove which extends along the front-back direction and is communicated with the gas chamber, and the safety device further comprises a switch unit which is movably arranged in the third containing groove and is used for controlling whether the gas is output from the gas chamber or not and controlling the flow rate.
The invention has the beneficial effects that: through the air cock unit reaches safety unit's setting, when atmospheric pressure was too high, can form dual safety protection to avoid meeting accident.
Drawings
Other features and effects of the present invention will become apparent from the following detailed description of the embodiments with reference to the accompanying drawings, in which:
FIG. 1 is a partial exploded perspective view of an embodiment of a safety device for a card type gas range according to the present invention;
FIG. 2 is a cross-sectional side view of the embodiment taken along a fore-aft direction, illustrating an air nozzle unit in an uninflated state;
FIG. 3 is a fragmentary enlarged view of FIG. 2;
FIG. 4 is a front view of the embodiment taken in a side-to-side direction illustrating a shaft in an air venting position;
FIG. 5 is a cross-sectional view similar to FIG. 2, illustrating the air nozzle unit in an inflated condition;
FIG. 6 is a fragmentary enlarged view of FIG. 5;
FIG. 7 is a cross-sectional view similar to FIG. 4, illustrating the shaft in an unventilated position;
FIG. 8 is a side view of the embodiment; and
FIG. 9 is an enlarged view similar to FIG. 6 illustrating the air nozzle unit in a safe state.
Detailed Description
Referring to fig. 1 to 4, an embodiment of the safety device of a card type gas stove according to the present invention is suitable for detachably connecting a gas canister 1 for outputting and supplying gas such as gas, wherein the gas canister 1 has a canister body 11 for accommodating the gas, a nozzle 12 telescopically disposed at a center of one end of the canister body 11, and a top ring 13 protrudingly disposed at one end of the canister body 11 and surrounding the nozzle 12. The safety device comprises a seat body unit 2, an air nozzle unit 3, a safety unit 4, a clamping unit 5, an air valve unit 6 and a switch unit 7.
The seat unit 2 defines an air chamber 20 extending along an up-and-down direction Z and having an upward opening, a first accommodating groove 21 located below the air chamber 20 and extending along a left-and-right direction Y, a first through hole 22 communicating the first accommodating groove 21 with the air chamber 20, a second accommodating groove 23 located below the air chamber 20 and extending along a front-and-back direction X, a second through hole 24 communicating the first accommodating groove 21 with the second accommodating groove 23, and a third accommodating groove 25 extending along the front-and-back direction X and communicating the air chamber 20 with an output port (not shown).
In terms of structure, the holder body unit 2 includes a base 26, a top cover 27 covering the base 26, a first plug 28 closing one end of the first vessel 21 and adjacent to the second through hole 24, and a second plug 29 mounted at the other end of the first vessel 21. The air chamber 20, the first accommodating groove 21, the first through hole 22, the second accommodating groove 23, the second through hole 24 and the third accommodating groove 25 are arranged in the base 26.
The air nozzle unit 3 is disposed along the front-back direction X, and includes a magnetic base 31 fixed outside the second accommodating groove 23 of the seat body unit 2, a sleeve 32 fixedly disposed at the center of the magnetic base 31 and extending into the second accommodating groove 23, a magnetic ring 33 disposed in the magnetic base 31 and sleeved on the periphery of the sleeve 32, a push pipe 34 movably accommodated in the sleeve 32, a valve shaft 35 movably inserted in the push pipe 34, a front ring 36 disposed in front of the inner peripheral surface of the sleeve 32, a rear ring 37 disposed in rear of the inner peripheral surface of the sleeve 32, a return spring 38 disposed between the push pipe 34 and the rear ring 37, a push spring 39 disposed between the valve shaft 35 and the seat body unit 2, and a plurality of air seals 30.
The gas seals 30 are respectively installed between the sleeve 32 and the front ring 36, between the sleeve 32 and the rear ring 37, between the outer periphery of the push pipe 34 and the sleeve 32, on the rear side of the inner peripheral surface of the push pipe 34, and between the outer periphery of the valve shaft 35 and the push pipe 34. The magnetic ring 33 has a magnetic attraction force suitable for magnetically attracting and positioning the top ring 13 of the gas tank 1. The pushing pipe 34 has a pipe hole 341 extending along the front-rear direction X and accommodating the valve shaft 35, the front end of the pipe hole 341 is adapted to be inserted by the nozzle 12 of the gas canister 1 to push the valve shaft 35, and the pipe hole 341 has a tapered hole portion 342. The valve shaft 35 and the air seal 30 sleeved on the periphery thereof can move together to close or open the tapered hole portion 342.
The safety unit 4 is disposed along the left-right direction Y, and includes a shaft 41 movably installed in the first receiving groove 21, a rod head 42 fixedly connected to an end of the shaft 41 extending out of the second plug 29, a compression spring 43 disposed between the shaft 41 and the second plug 29 and having an elastic force for restoring the shaft 41 after moving, and a plurality of rings 44 disposed around the shaft 41. The shaft 41 has a first end 411 facing the first plug 28 and adjacent to the second through hole 24, and a second end 412 extending out of the second plug 29 and fixed to the rod head 42. The shaft 41 defines a channel 413 extending from an end surface of the first end 411 toward the second end 412 and passing radially upward, and a groove 414 recessed on an outer peripheral surface adjacent to the second end 412. With the movement of the shaft 41, the passage 413 can be directly communicated with the first through hole 22, or can be staggered with the first through hole 22 without being communicated.
The locking unit 5 includes a locking plate 51 disposed outside the base unit 2 and correspondingly abutted against the portion of the shaft 41 extending out of the second plug 29, a pivot 52 pivotally connecting the locking plate 51 to the base unit 2 in a swinging manner, a pin 53 passing through the locking plate 51 and fixed to the base unit 2 and used for limiting the swinging range of the locking plate 51, and a torsion spring 54 installed between the base unit 2 and the locking plate 51 and having an elastic force for swinging the locking plate 51 toward the shaft 41. The clamping plate 51 is correspondingly located between the rod head 42 and the second plug 29, and has a sliding slot 511 for the pin 53 to slide relatively. In general, the catch plate 51 is elastically abutted against the second end 412, and when the shaft 41 protrudes outward, the catch plate 51 is rotatably inserted into the catch groove 414 downward as shown in fig. 7 and 8, so that the shaft 41 is locked and fixed.
The air valve unit 6 is used for controlling whether the first through hole 22 is communicated with the air chamber 20, the air valve unit 6 is arranged along the vertical direction Z, and comprises a valve rod 61 which is pivotally connected in the air chamber 20 and can be used for covering the first through hole 22, a piston 62 of which the periphery is transversely arranged between the base 26 and the top cover 27 and the bottom center is connected with the valve rod 61, and a pressing spring 63 which is arranged between the center of the piston 62 and the top cover 27 and has elastic force for pressing the piston 62 downwards.
The switch unit 7 is movably disposed in the third accommodating groove 25, and can be used for controlling the output and flow rate of the gas in the gas chamber 20. Since the construction and operation of the switch unit 7 is of a general design and is not the focus of the present invention, it will not be described here.
In the following, the safety device of the present invention is further described, in a situation that the gas canister 1 is not installed, the gas nozzle unit 3 is in an unaerated state of being magnetically connected to the gas canister 1, the valve shaft 35 blocks the tapered hole 342 of the push pipe 34, the shaft 41 of the safety unit 4 is in a ventilation position relative to the base unit 2, so that the passage 413 is correspondingly communicated with the first through hole 22, at this time, the pipe hole 341, the second through hole 24, the first receiving groove 21 are communicated with the first through hole 22, and the shaft 41 is retracted, so that the engaging groove 414 does not protrude out of the second plug 29, and the engaging plate 51 is elastically abutted against the second end 412, so that the torsion spring 54 stores an elastic force. In addition, since no gas is filled into the air chamber 20, the piston 62 is not pushed upward, and only the pressing spring 63 presses the piston 62 downward, so that the valve rod 61 is inclined away from the upper side of the first through hole 22, and the first through hole 22 is communicated with the air chamber 20.
As shown in fig. 4 to 6, when the gas canister 1 is to be inflated, the gas canister 1 is mounted to the air nozzle unit 3 forward along the front-back direction X, the nozzle 12 is inserted forward into the pipe hole 341 of the push pipe 34, the valve shaft 35 is pushed to slide forward and leave the tapered hole 342, and a gap 343 is formed by the cooperation of the pushing tube 34, the valve shaft 35 will also compress the pushing spring 39 to make the pushing spring 39 accumulate elastic force, when the front end of the valve shaft 35 abuts against the end surface of the seat 26 that delimits the second pocket 23, the nozzle 12 of the gas canister 1 is pressed relatively to eject the gas from the nozzle 12, and flows into the first vessel 21 through the second through hole 24 from the gap 343, meanwhile, the magnetic ring 33 also magnetically attracts and positions the top ring 13 of the gas tank 1, so that the gas nozzle unit 3 is changed from the uninflated state to an inflated state for the gas to be filled.
Then, the other structure is operated according to the flow direction of the gas, as shown in fig. 4, since the shaft 41 of the safety unit 4 is located at the ventilation position, when the gas enters the first groove 21, the gas flows into the channel 413 of the shaft 41 and flows into the gas chamber 20 through the first through hole 22. When the gas pressure in the gas chamber 20 rises, the piston 62 is pushed upwards as shown in fig. 5, the valve rod 61 is driven to swing to close the first through hole 22, the pressing spring 63 is compressed, and when the gas in the gas chamber 20 is conveyed outwards for ignition, the gas pressure in the gas chamber 20 is reduced, namely the piston 62 and the valve rod 61 can be pushed to reset through the resetting elasticity of the pressing spring 63, and the first through hole 22 is opened for gas to enter for supplement as shown in fig. 2 and 4, so that the gas valve unit 6 can reciprocate between the positions shown in fig. 2 and 5, and can be used for automatically adjusting the gas flow entering the gas chamber 20.
As shown in fig. 7 and 8, when the gas pressure in the gas chamber 20 is too high, or when the gas pressure filled in the gas tank 1 is too high, the high-pressure gas entering the first container 21 will force the shaft 41 to move outwards, so that the shaft moves from the ventilation position (see fig. 4) to an unventilated position, the channel 413 and the first through hole 22 are dislocated and not communicated, the first through hole 22 is closed to interrupt the gas path, the first container 21 and the first through hole 22 are not communicated, the gas in the first container 21 cannot flow into the gas chamber 20, the gas supply interruption flame is extinguished, and thereby the abnormal overpressure of the gas chamber 20 is avoided, so as to have a safety effect.
In addition, when the shaft 41 moves toward the second plug 29, not only the compression spring 43 is pushed, but also the catch plate 51 can swing by the elastic force of the torsion spring 54 while the catch groove 414 of the shaft 41 protrudes out of the second plug 29, and partially insert downward into the catch groove 414 to avoid the accident that the shaft 41 moves back to the ventilation position due to carelessness or other factors when the high pressure is not relieved, so that the safety can be further enhanced. When the overpressure condition is released and the gas supply is to be resumed, the locking plate 51 is pulled to swing the locking plate 51 away from the locking groove 414, the shaft 41 can be reset by the elastic force of the compression spring 43, and then the locking plate 51 is released to allow the locking plate 51 to elastically abut against the second end 412 again.
As shown in fig. 9, on the other hand, when the gas pressure is too high, the gas nozzle unit 3 also changes from the inflated state (see fig. 6) to a safe state, that is, the valve shaft 35 is forced to move backwards to block the inclined conical hole 342 of the push pipe 34 by the high-pressure gas in the first accommodating groove 21 and the elastic force released by the push spring 39, and then the push pipe 34 is driven to move backwards together to push the gas canister 1 until the gas canister 1 is disengaged from the magnetic ring 33 and no gas is supplied any more. When the push tube 34 moves backward, the return spring 38 is compressed to accumulate the elastic force, so that when the gas pressure returns to normal, the return spring 38 releases the elastic force to push the push tube 34 and the valve shaft 35 to move forward and return, and the gas nozzle unit 3 is changed from the safe state to the non-inflated state shown in fig. 3.
In summary, in the safety device of the card-type gas stove of the present invention, the air nozzle unit 3 and the safety unit 4 are disposed on the base unit 2, so that when the air pressure is abnormally too high, on one hand, the shaft 41 of the safety unit 4 is driven by the high-pressure air to automatically block the passage between the first groove 21 and the air chamber 20, and on the other hand, the valve shaft 35 of the air nozzle unit 3 is also driven by the high-pressure air to drive the push pipe 34 to push the gas canister 1 open, so that the gas canister 1 is separated from the adsorption location of the magnetic ring 33, thereby interrupting the supply of air, and thus forming a double safety protection mechanism, further enhancing the safety, avoiding accidents, ensuring the safety in practical use, and indeed achieving the purpose of the present invention.
The above description is only an example of the present invention, and the scope of the present invention should not be limited thereby, and the invention is still within the scope of the present invention by simple equivalent changes and modifications made according to the claims and the contents of the specification.
Claims (10)
1. A safety device of a card type gas range adapted to detachably connect a gas canister for supplying gas, the safety device comprising: pedestal unit, air cock unit, and the safety unit, the pedestal unit defines out the air chamber, extends and communicates along left right direction the first groove, the second that extends and communicate along the fore-and-aft direction of holding the first groove of holding, intercommunication the first groove with the first through-hole of air chamber, and the intercommunication the first groove with the second through-hole in second appearance groove, its characterized in that:
the air faucet unit comprises a magnetic ring arranged outside the second accommodating groove of the seat body unit, a push pipe movably arranged in the second accommodating groove, a valve shaft movably arranged in the push pipe in a penetrating manner, a magnetic seat fixed on the seat body unit and used for accommodating the magnetic ring, a sleeve fixedly arranged in the center of the magnetic seat and used for accommodating the push pipe, a front ring arranged on the front side of the sleeve, a rear ring arranged on the rear side of the sleeve, a return spring arranged between the push pipe and the rear ring, and a push spring arranged between the valve shaft and the seat body unit, wherein the push pipe is provided with a pipe hole for accommodating the valve shaft, and the pipe hole is provided with an oblique taper hole part; the gas nozzle unit can be changed among an uninflated state, an inflated state and a safe state, when the gas nozzle unit is in the uninflated state, the gas can is not magnetically attracted and connected, the valve shaft seals the inclined conical hole part, when the gas nozzle unit is in the inflated state, the magnetic ring is magnetically attracted and connected with the gas can, the gas can is inserted into the push pipe and pushes the valve shaft to move forwards to leave the inclined conical hole part, the gas flows into the first containing groove, and when the gas nozzle unit is in the safe state, high-pressure gas in the first containing groove forces the valve shaft to drive the push pipe to move backwards to push the gas can, so that the gas can is separated from the magnetic ring and is not supplied with gas;
the safety unit comprises a shaft movably mounted in the first vessel; the shaft rod moves between a ventilation position and an unvented position relative to the seat body unit, when the shaft rod is at the ventilation position, the first through hole is not closed, and the gas in the first containing groove can flow into the gas chamber, when the shaft rod is at the unvented position, the shaft rod moves outwards under the pressure of the high-pressure gas in the first containing groove to close the first through hole, so that the gas in the first containing groove cannot flow into the gas chamber to interrupt gas supply.
2. The safety device for a card type gas range according to claim 1, wherein: the shaft of the safety unit is communicated with the first containing groove and the first through hole when the shaft of the safety unit is at the ventilation position.
3. The safety device for a card type gas range according to claim 2, wherein: the pipe hole is along the fore-and-aft direction extends the air cock unit is in during the non-inflation state, the valve shaft blocks and seals oblique taper hole portion, the air cock unit by the non-inflation state changes into during the inflation state, the valve shaft with the pipe push cooperatees and forms the clearance that can supply the gas to pass through, the air cock unit is in during the safety condition, the valve shaft blocks and seals the oblique taper hole portion of pipe push.
4. A safety device for a card type gas range according to claim 3, wherein: the sleeve extends into the second containing groove, the front ring is arranged on the front side of the inner circumferential surface of the sleeve, and the rear ring is arranged on the rear side of the inner circumferential surface of the sleeve; when the air nozzle unit is converted from the non-inflated state to the inflated state, the valve shaft moves forwards to compress the pushing spring, when the air nozzle unit is converted from the inflated state to the safe state, the pushing spring releases elasticity to push the valve shaft to move backwards to drive the push pipe to move backwards and compress the return spring, and when the air nozzle unit is converted from the safe state to the non-inflated state, the return spring releases elasticity to push the push pipe forwards to drive the valve shaft to return.
5. The safety device for a card type gas range according to claim 4, wherein: the air nozzle unit further comprises a plurality of air seals, and the air seals are respectively arranged between the sleeve and the front ring, between the sleeve and the rear ring, between the periphery of the push pipe and the sleeve, on the rear side of the inner circumferential surface of the push pipe and between the periphery of the valve shaft and the push pipe.
6. The safety device for a card type gas range according to claim 2, wherein: the seat body unit comprises a first plug head which is plugged at one end of the first accommodating groove and is adjacent to the second through hole, a second plug head which is installed at the other end of the first accommodating groove and is used for the shaft lever to extend out, the safety unit also comprises a compression spring which is arranged between the shaft lever and the second plug head and has elasticity for restoring the shaft lever after moving, and a plurality of annular rings which are sleeved on the periphery of the shaft lever, the shaft lever is provided with a first end part which is adjacent to the second through hole and a second end part which extends out of the second plug head, and the shaft lever defines a channel which extends from the end surface of the first end part to the direction of the second end part and then radially upwards passes out; when the shaft rod is at the ventilation position, the channel is communicated with the first through hole, the gas flowing into the first containing groove from the second containing groove enters the gas chamber through the channel and the first through hole, and when the shaft rod is at the non-ventilation position, the channel is not communicated with the first through hole, so that the gas in the first containing groove cannot enter the gas chamber.
7. The safety device for a card type gas range according to claim 6, wherein: the shaft lever further defines a clamping groove which is adjacent to the second end part and is concavely formed on the peripheral surface, the safety device further comprises a clamping unit which is used for clamping and positioning the shaft lever, the clamping unit comprises a clamping plate which can be pivotally connected on the seat body unit in a swinging mode, and a torsion spring which is arranged between the seat body unit and the clamping plate and has elasticity enabling the clamping plate to swing towards the shaft lever; when the shaft lever is located at the ventilation position, the clamping plate is abutted against the second end of the shaft lever, and when the shaft lever moves outwards to the non-ventilation position, the clamping plate swings and is partially embedded into the clamping groove of the shaft lever to be positioned through the elasticity of the torsion spring.
8. The safety device for a card type gas range according to claim 7, wherein: the safety unit further comprises a rod head fixedly connected to one end, extending out of the second plug head, of the shaft rod and located on the outer side of the clamping plate.
9. The safety device for a card type gas range according to claim 2, wherein: the safety device comprises a base, a top cover and an air valve unit, wherein the top cover is sealed above the base, the safety device further comprises an air valve unit used for controlling whether the first through hole is communicated with the air chamber or not, the air valve unit comprises a valve rod which is positioned in the air chamber and can be pivoted on the base in a swinging mode, a piston which is transversely arranged between the base and the top cover and is connected with the valve rod at the bottom, and a pressing spring which is arranged between the center of the piston and the top cover and has elastic force for pushing and pressing the piston downwards; the gas entering the gas chamber from the first through hole can push the piston and simultaneously compress the abutting spring, so that the piston upwards drives the valve rod to seal the first through hole, and the abutting spring can push the piston and the valve rod to reset after the gas is output and released.
10. The safety device for a card type gas range according to claim 1, wherein: the seat body unit is also provided with a third containing groove which extends along the front-back direction and is communicated with the air chamber, and the safety device also comprises a switch unit which is movably arranged in the third containing groove and is used for controlling whether the air is output from the air chamber or not and controlling the flow.
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|---|---|---|---|
| CN201910066094.5A CN111473368B (en) | 2019-01-24 | 2019-01-24 | Safety device for gas stove |
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| CN201910066094.5A CN111473368B (en) | 2019-01-24 | 2019-01-24 | Safety device for gas stove |
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| CN111473368B true CN111473368B (en) | 2022-06-07 |
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| CN201910066094.5A Active CN111473368B (en) | 2019-01-24 | 2019-01-24 | Safety device for gas stove |
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| CN111473368A (en) | 2020-07-31 |
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