CN211951569U

CN211951569U - Ever-burning fire gas valve

Info

Publication number: CN211951569U
Application number: CN201921440022.4U
Authority: CN
Inventors: 李雪波
Original assignee: Ningbo Laite Gas Stoves Co ltd
Current assignee: Ningbo Laite Gas Stoves Co ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-11-17
Anticipated expiration: 2029-08-30

Abstract

A long open fire gas valve comprises a valve body internally provided with a gas inlet channel, a main gas outlet channel and a long open fire gas outlet channel, wherein a valve core is arranged in the valve body, the valve core is provided with a vent cavity, the side wall of the vent cavity is provided with a fire hole, a knob rod is arranged on the valve body in a penetrating way, and the knob rod keeps moving upwards; a valve plate for controlling the air output of the main air outlet channel is also arranged in the valve body; the method is characterized in that: the valve plate is positioned below the valve core, the valve plate can be driven to move by the rotation of the valve core, an auxiliary long open fire air passage communicated with the main long open fire air outlet channel is arranged in the valve body, and a long open fire barrier groove is formed in the outer peripheral wall of the valve core and is blocked with the vent cavity; the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole through the long open fire barrier groove and whether the air inlet channel is communicated with the long open fire auxiliary air channel through the long open fire barrier groove. The gas valve does not need to be additionally provided with a gear clutch structure, simplifies the structure and greatly reduces the cost.

Description

Ever-burning fire gas valve

Technical Field

The utility model relates to a gas valve especially relates to a gas valve that is fit for being used for gas oven to have long naked light function.

Background

Some gas oven inside have two baking chamber that the interval set up from top to bottom, are equipped with a fire row in every baking chamber respectively, and the lower fire row that is located lower part baking chamber generally has the fire control possibility, and the fire row fire intensity of the last fire that is located upper portion baking chamber is certain, generally for big fire. Because of the fire row is sheltered from completely by the box of oven down, it is then visible to go up the fire row, consequently when setting a fire for down row ignition, can't observe with eyes whether to ignite successfully, if it is unsuccessful to ignite many times, because of there is the gas release in the ignition process, when the ignition is successful next time, can be because the gas content of fire row surrounding air is great down, can have the plosives of "popping at first" when igniting, there is certain potential safety hazard, some countries are out of the throne national standard, can not have the aforesaid condition to take place. The ignition row can directly observe whether the ignition is successful, so that the condition does not exist. Such a gas oven is disclosed in the chinese utility model patent No. ZL201220709936.8 (publication No. CN203059420U), a dual chamber gas oven consisting of flow deflectors.

How to design a gas valve which ensures the efficiency of fire grate ignition is a technical problem which needs to be solved urgently by the technical personnel in the field. For this reason, the applicant applied for a chinese patent application, namely "gas valve for electrical and gas", with application number CN201810984517.7 (publication number CN109058518A) shortly before. A clutch structure is required to be arranged between a knob rod and a valve core of the gas valve, a driving gear which can rotate along with the knob rod is sleeved on the knob rod, the knob rod can slide up and down relative to the driving gear, only one section of driving arc-shaped tooth part is arranged on the driving gear, and the other section of driving gear is a toothless arc-shaped surface; the valve core is sleeved with a driven gear which can rotate along with the valve core, the driven gear only has one section of driven arc-shaped tooth part, and the other section of the driven gear is a toothless arc-shaped surface; the driving gear and the driven gear form a clutch structure. The valve core can not rotate to ensure that the ever-burning naked flame and the main flame are always ignited in a certain rotation angle stroke, so the clutch structure is adopted, the cost of the valve is high due to the arrangement of the clutch structure, the requirements of the clutch gear structure on the product precision and the assembly are extremely high, and the competitiveness is lacked.

And the internal channel of the valve body of the existing ever-burning gas valve is complex or the valve core structure is complex.

The security and the rationality of present country to gas valve product require more and more high, and current gas valve is rotating to arbitrary angular position, all pushes down and triggers ignition switch, and this just is igniteed when main gas outlet channel ventilates, and the air has higher gas content around the fire was arranged in a stove or a fuel gas, still has the plosives of "popping at" during the ignition. For this reason, the supplier is required to design a knob lever in which the ignition switch is not activated when the knob lever is initially pressed down, but only after a certain angle of rotation (ensuring that the open flame path is vented in this angular position).

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a structural design is more reasonable and simple ever-burning flame gas valve is provided to above-mentioned prior art current situation, when guaranteeing that the fire row ignites, only ever-burning flame passageway ventilates earlier (main air outlet channel is not ventilated), and ever-burning flame ignites earlier promptly, then turns to the knob pole again, lets main air outlet channel ventilate and accomplish down the fire row and ignite.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a gas valve with ever-burning flame comprises a valve body internally provided with a gas inlet channel, a main gas outlet channel and an ever-burning flame gas outlet channel, wherein a rotatable valve core is arranged in the valve body, the lower part of the valve core is provided with a vent cavity with a downward opening, the side wall of the vent cavity is provided with a fire hole, a knob rod for driving the valve core to rotate is arranged on the valve body in a penetrating way, and the knob rod keeps moving upwards; a valve plate for controlling the air output of the main air outlet channel is also arranged in the valve body; the method is characterized in that: the valve plate is positioned below the valve core, the valve plate can be driven to move by the rotation of the valve core, a long open fire auxiliary air passage communicated with the long open fire main air outlet channel is arranged in the valve body, and a long open fire barrier groove is formed in the outer peripheral wall of the valve core and is blocked with the vent cavity; the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole through the long open fire barrier groove and whether the air inlet channel is communicated with the long open fire auxiliary air channel through the long open fire barrier groove.

As a specific preferred gas path control mode, when the knob rod and the valve core are in an original state, the fire hole is blocked from the main gas outlet channel, and the pilot gas channel of the long open fire is blocked from the pilot gas channel of the long open fire; in the process that the knob rod rotates to a first angle from an original state, the valve core can be driven to rotate to a position where the air inlet channel is communicated with the pilot gas channel of the pilot fire through the pilot fire barrier groove, and meanwhile, the air inlet channel and the fire hole are in a blocking state; and in the process that the knob rod continues to rotate from the first angle state to the second angle, the valve core is driven to rotate to the air inlet channel and is simultaneously communicated with the pilot gas channel and the fire hole of the ever-burning fire. The gas inlet channel can only rotate in one direction after starting in the working process, when the gas inlet channel rotates to a first angle, the gas is communicated with the ever-burning open fire gas outlet channel through the ever-burning open fire barrier groove and the ever-burning open fire auxiliary air channel through the gas inlet channel, the ever-burning open fire is ventilated, the gas continues to rotate, the gas is communicated with the ever-burning open fire gas outlet channel through the ever-burning open fire barrier groove and the ever-burning open fire auxiliary air channel, the ever-burning open fire gas outlet channel is ensured to be not disconnected, meanwhile, the gas inlet channel is communicated with the main gas outlet channel through the fire hole, and.

Preferably, the middle part of the main air outlet channel is provided with a valve port, the valve port is positioned right below the valve core, the valve plate is restrained below the valve port and can move up and down, the opening degree of the valve port is increased by the downward movement of the valve plate, and the opening degree of the valve port is reduced by the upward movement of the valve plate; in the process of anticlockwise rotating of the valve core, the valve plate is driven to move downwards by the rotation of the valve core; in the process of clockwise rotation of the valve core, the valve plate is driven to move upwards by the rotation of the valve core. The valve plate is designed to be directly linked with the valve core by the structure, so that the valve plate is convenient to assemble and enables a product to be miniaturized.

As an improvement, an auxiliary air passage is arranged in the valve body, an air inlet of the auxiliary air passage is positioned above the valve port, an air outlet of the auxiliary air passage is positioned below the valve port, and when the valve plate closes the valve port, the fuel gas coming out of the fire hole can only be communicated with the outlet end of the main air outlet passage through the auxiliary air passage. When the fire discharge temperature exceeds a set value, the valve plate can close the valve port, and the air flow passing through the main air outlet channel can only flow out from the outlet end of the main air outlet channel through the auxiliary air channel, so that the fire discharge temperature is kept in a minimum fire state. Preferably, an adjusting fluid for adjusting the air output of the auxiliary air passage is vertically arranged in the auxiliary air passage in a penetrating manner. The setting of the adjusting flow can adjust the fire behavior of the minimum fire of the fire row.

The valve block is further improved, the valve block is fixed in the middle of an adjusting rod, the upper portion of the adjusting rod is inserted into an inner cutting groove in the lower end of a valve core, the valve core can move up and down relative to the adjusting rod, the valve core can rotate to drive the adjusting rod to rotate, a threaded hole with a downward opening is formed in the bottom of the adjusting rod, a threaded column is fixed at the bottom in the valve body, and the threaded column is located below the adjusting rod and is inserted into the threaded hole in a threaded mode. The inner cutting groove of the valve core is connected with the adjusting rod, so that the adjusting rod can be driven to rotate, the structure of the valve core is fully utilized, the structure is simplified, the valve block is driven to move by the aid of the principle of thread transmission because the adjusting rod is in rotating operation, the valve block is driven to move up and down by the aid of rotation of the adjusting rod, and the design is more reasonable.

For making the gas valve have automatic temperature control regulatory function, as preferred, above-mentioned valve body bottom is worn to establish and is fixed with power component, the screw thread post sets up on this power component, and power component can reciprocate through expend with heat and contract with cold, the below of valve block is equipped with auxiliary spring. The power part passes through the heat-conducting component and is connected with the temperature sensing stick, there is temperature sensing oil inside the power part, drive reciprocating of power part through expend with heat and contract with cold, reach the uniform temperature when the hot row temperature, the temperature sensing stick passes through the heat-conducting component conduction with the heat and gives temperature sensing oil, the power part reciprocates under the promotion of temperature sensing oil, finally realize the regulation to the valve block upper and lower position, the air output of the first main air outlet channel of control, because of the power part range of moving up under the expend with heat effect is not very big, still can not let the valve block effectively plug up the valve port, and under auxiliary spring's effect, guarantee that the valve block effectively plugs up the valve port.

The valve body comprises a valve seat and a valve cover fixed on the valve seat, wherein a limiting groove and an upper limiting boss are arranged on the inner top surface of the valve cover, an ignition groove and a lower limiting boss are arranged on the top surface of an inner hole of the valve seat, and a knob rod is provided with a limiting column with a side projection; when the knob rod is in an original state, the limiting column keeps the tendency of being clamped into the limiting groove, and the knob rod can be rotated only by pressing down in the original state; after the knob rod is pressed down at the original position, the lower limiting boss shifts the limiting column to prevent the knob rod from rotating clockwise; under the condition that the knob rod rotates to a first angle from an original state, the limiting column is aligned with the ignition groove, so that the knob rod can be further moved downwards in the position state to finish ignition; and the knob rod is blocked from further anticlockwise rotating when the limiting column and the upper limiting boss are in a gear state. The design is safer, namely when the valve core rotates to a first angle position from an original state, the downward movement amplitude of the knob rod cannot trigger the ignition switch, when the valve core reaches the first angle position, due to the arrangement of the ignition groove, the knob rod cannot rotate further when the valve core reaches the first angle position by combining the blocking of the lower limiting boss, the knob rod can be fully moved further downward, the ignition switch is further triggered, the ignition can be ensured only when the long open flame air outlet channel exhausts air, and the safety is better; after the ignition is successful, the knob rod moves upwards under the action of the reset spring, the limiting column and the lower limiting boss are staggered, and the knob rod can further rotate anticlockwise to adjust the fire.

Preferably, the fire hole includes two hole portions formed in a side wall of the valve body and communicating with the vent chamber, and a main fire barrier groove formed in an outer peripheral wall of the valve body, the main fire barrier groove being blocked from the vent chamber, and both ends of the main fire barrier groove communicating with the hole portions. The provision of the main fire barrier groove increases the time for communication with the intake passage, and of course, the bore of the hole portion may be made large, which in turn affects the strength of the valve element.

In order to facilitate the communication of the air inlet channel with the fire hole and the long open fire rampart groove, the cross section of the port of the air inlet channel communicated with the cavity in which the valve core is arranged in the valve body is in a strip shape.

In order to ensure that the operation of the gas valve is safer, a safety electromagnetic valve is arranged in the valve body, the safety electromagnetic valve and the valve core are arranged at intervals and are positioned in the air inlet channel, a top rod penetrates through the valve body, the top rod can trigger the safety electromagnetic valve when moving downwards, a spring enabling the top rod to keep moving upwards is sleeved on the top rod, an energy driving plate is sleeved on the knob rod, the driving plate can move axially along with the knob rod, but the knob rod can rotate around the axis of the driving plate relative to the driving plate. Only the knob rod is pressed downwards to trigger the safety electromagnetic valve, the air source main switch can be opened, if the knob rod is not pressed downwards in place, the safety electromagnetic valve is not triggered, and no fuel gas flows out even if the valve core rotates.

Compared with the prior art, the utility model has the advantages of: through the special design of the valve core, namely the peripheral wall of the valve core is provided with the long open fire barrier groove which is blocked with the vent cavity, and then the combination is carried out, the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole through the long open fire barrier groove or not, and whether the air inlet channel is communicated with the long open fire auxiliary air channel through the long open fire barrier groove or not. The valve plate can be arranged below the valve core, the valve plate can be driven to move by rotation of the valve core, an original gear transmission structure is omitted, the structure is simplified, the manufacturing and assembling difficulty is reduced, ignition of the pilot flame is realized by communicating the pilot flame barrier groove and the pilot flame auxiliary air passage, a gear clutch structure is not required to be additionally arranged, the structure is simplified, and the cost is greatly reduced.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention;

fig. 2 is a schematic perspective view of an embodiment of the present invention;

fig. 3 is a cross-sectional view (original state) of an embodiment of the present invention;

FIG. 4 is a sectional view taken along line A-A of FIG. 3;

fig. 5 is a cross-sectional view of an embodiment of the invention (rotated to a first angular position);

fig. 6 is a cross-sectional view (rotated to a second angular position) of an embodiment of the present invention;

fig. 7 is a schematic perspective view of a valve element in a valve according to an embodiment of the present invention;

fig. 8 is a schematic perspective view of a valve element in a valve according to an embodiment of the present invention;

fig. 9 is a schematic perspective view of a valve seat in a valve according to an embodiment of the present invention;

fig. 10 is a schematic perspective view of a valve cover in a valve according to an embodiment of the present invention;

fig. 11 is a schematic perspective view of a knob stem with a rotation limiting disc in a valve according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

As shown in fig. 1 to 11, it is a preferred embodiment of the present invention.

A gas valve with an improved structure and a long open fire function comprises a valve body 1 internally provided with an air inlet channel 1a, a main air outlet channel 1b and a long open fire air outlet channel 1c, wherein a rotatable valve core 2 is arranged in the valve body 1, the lower part of the valve core 2 is provided with a vent cavity 21 with a downward opening, the side wall of the vent cavity 21 is provided with a fire hole 23, a knob rod 3 for driving the valve core 2 to rotate is arranged on the valve body 1 in a penetrating way, and the knob rod 3 keeps moving upwards under the action of a return spring 32; the valve body 1 is also internally provided with a valve plate 4 for controlling the air output of the main air outlet channel 1 b. The valve body 1 comprises a valve seat 11 and a valve cover 12 fixed on the valve seat 11, and the knob rod 3 penetrates through the valve cover 12 and extends into the valve seat 11.

The fire hole 23 includes two hole portions 231 formed in the side wall of the valve body 2 and communicating with the vent chamber 21, and a main fire barrier groove 232 formed in the outer peripheral wall of the valve body 2, the main fire barrier groove 232 is blocked from the vent chamber 21, and both ends of the main fire barrier groove 232 communicate with the hole portions 231. The cross section of the inlet channel 1a and the port 1a1 communicated with the chamber of the valve body 1 in which the valve core 2 is arranged is strip-shaped.

The valve plate 4 is positioned below the valve core 2, the valve core 2 can drive the valve plate 4 to move through rotation, a long open fire auxiliary air channel 1c1 communicated with the long open fire air outlet channel 1c is arranged in the valve body 1, a long open fire barrier groove 22 is arranged on the outer peripheral wall of the valve core 2, and the long open fire barrier groove 22 is blocked with the vent cavity 21; the rotation of the valve body 2 determines whether the intake passage 1a communicates with the flame hole 23 through the long open flame barrier groove 22 and whether the intake passage 1a communicates with the long open flame auxiliary air passage 1c1 through the long open flame barrier groove 22.

As shown in fig. 3 and 4, in the original state of the knob stem 3 and the valve body 2, the fire hole 23 is blocked from the main outlet passage 1b, and the pilot gas passage 1c1 is blocked from the pilot base groove 22.

As shown in fig. 5, in the process that the knob lever 3 is rotated from the original state to the first angle α 1, the valve body 2 can be driven to rotate to a position where the air intake passage 1a communicates with the pilot gas duct 1c1 through the pilot flame barrier groove 22, and the air intake passage 1a and the flame hole 23 are blocked.

As shown in fig. 6, in the process that the knob rod 3 continues to rotate from the first angle α 1 to the second angle, the valve core 2 is driven to rotate to the air inlet channel 1a and simultaneously to communicate with the pilot gas channel 1c1 of the open flame and the flame hole 23.

In the process that the knob rod 3 rotates anticlockwise from the first angle alpha 1 to the second angle alpha 2, the valve plate 4 is driven to move towards the direction of increasing the air output of the main air outlet channel 1 b.

The middle part of the main air outlet channel 1b is provided with a valve port 10, the valve port 10 is positioned right below the valve core 2, the valve plate 4 is restrained below the valve port 10 and can move up and down, the opening degree of the valve port 10 is increased by downward movement of the valve plate 4, and the opening degree of the valve port 10 is reduced by upward movement of the valve plate 4; in the process of anticlockwise rotating of the valve core 2, the valve plate 4 is driven to move downwards by the rotation of the valve core 2; in the process of clockwise rotation of the valve core 2, the valve plate 4 is driven to move upwards by the rotation of the valve core 2.

An auxiliary air passage 1d is arranged in the valve body 1, an air inlet 1d1 of the auxiliary air passage 1d is positioned above the valve port 10, an air outlet 1d2 of the auxiliary air passage 1d is positioned below the valve port 10, and under the state that the valve plate 4 closes the valve port 10, the fuel gas coming out of the fire hole 23 can only be communicated with the outlet end of the main air outlet channel 1b through the auxiliary air passage 1 d.

An adjusting fluid 13 for adjusting the air output of the auxiliary air passage 1d vertically penetrates through the auxiliary air passage 1 d. Of course, the regulator 13 may not be provided

The valve plate 4 is fixed in the middle of an adjusting rod 7, the upper part of the adjusting rod 7 is inserted into the inner cutting groove 24 at the lower end of the valve core 2, the valve core can move up and down relative to the adjusting rod 7, the valve core can rotate to drive the adjusting rod 7, the bottom of the adjusting rod 7 is provided with a threaded hole 71 with a downward opening, the bottom in the valve body 1 is fixed with a threaded column 61, and the threaded column 61 is positioned below the adjusting rod 7 and is inserted into the threaded hole 71 to be connected into the threaded hole 71.

The bottom of the valve body 1 is fixedly provided with a power component 6 in a penetrating way, the threaded column 61 is arranged on the power component 6, the power component 6 can move up and down through expansion with heat and contraction with cold, and the structure inside the power component 6 is not shown in the drawing. An auxiliary spring 62 is arranged below the valve plate 4. This power part 6's drive structure is connected with temperature sensing stick 63, power part 6's built-in cavity has temperature sensing oil, the cavity can be based on the expend with heat and contract with cold production of inside temperature sensing oil and reciprocate, when the hot row temperature reaches the uniform temperature, the heat of temperature sensing stick 63 conducts through the heat-conducting component and gives temperature sensing oil, power part 6 reciprocates (is heated, the inflation, power part 6 moves up, meet the cold, the shrink, power part 6 moves down) under the promotion of temperature sensing oil, finally realize the regulation to the upper and lower position of valve block 4, the volume of giving vent to anger of control main gas outlet channel 1 b. If the power part 6 moves upwards to push the valve plate 4 to move upwards, and the valve port 10 is closed under the action of the auxiliary spring 62, the gas from the fire hole 23 can only be communicated with the outlet end of the main gas outlet channel 1b through the auxiliary gas channel 1d, and is at the minimum fire position.

The inner top surface of the valve cover 12 is provided with a limiting groove 121 and an upper limiting boss 122, the inner hole top surface of the valve seat 11 is provided with an ignition groove 111 and a lower limiting boss 112, and the knob rod 3 is provided with a laterally convex limiting column 31; when the knob stem 3 is in the original state, the limiting column 31 keeps the trend of being clamped into the limiting groove 121; after the knob rod 3 is pressed down at the original position, the lower limiting boss 112 shifts the limiting column 31 to prevent the knob rod 3 from rotating clockwise; in the state that the knob rod 3 rotates to the first angle alpha 1 from the original state, the limiting column 31 is aligned with the ignition groove 111, so that the knob rod 3 can be further moved downwards in the position state to finish ignition; when the stopper post 31 and the upper stopper boss 122 are in a shift state, the knob lever 3 is blocked from further counterclockwise rotation.

The safety electromagnetic valve 8 is arranged in the valve body 1, the safety electromagnetic valve 8 and the valve core 2 are arranged at intervals and are located in the air inlet channel 1a, the valve body 1 is provided with the ejector rod 9 in a penetrating mode, the ejector rod 9 can trigger the safety electromagnetic valve 8 when moving downwards, the ejector rod 9 is sleeved with a spring 91 enabling the ejector rod 9 to keep moving upwards, the knob rod 3 is sleeved with the driving plate 92, and the driving plate 92 can move axially along with the knob rod 3, but the knob rod 3 can rotate around the axis of the driving plate 92 relative to the driving plate 92.

The working principle and the process of the gas valve are as follows:

the knob rod 3 is pressed downwards, the limiting column 31 is separated from the limiting groove 121 for constraint, the driving plate 92 moves downwards along with the knob rod 3, the ejector rod 9 overcomes the elasticity of the spring 91 to move downwards to trigger the safety electromagnetic valve 8, and the air source main switch is opened.

The lower limit boss 112 shifts the limit column 31 to prevent the knob rod 3 from rotating clockwise, and in the process of rotating the knob rod 3 counterclockwise to a first angle, the first angle in the embodiment is 50 degrees, that is, when the knob rod is rotated to the first angle, the valve core 2 is driven to rotate until the air inlet channel 1a is communicated with the long open flame auxiliary air passage 1c1 through the long open flame barrier groove 22, and meanwhile, the air inlet channel 1a is blocked from the fire hole 23; the fuel gas sequentially passes through the air inlet channel 1a, the ventilation cavity 21, the long open fire barrier groove 22 and the long open fire auxiliary air channel 1c1 and then is discharged through the long open fire outlet channel 1c, and the fire hole 23 is still blocked with the main outlet channel 1b, so that the main outlet channel 1b is ensured to be in an air-cut-off state; the ignition switch is not triggered at this time.

As shown in FIG. 5, when the knob stem 3 is at the first angular position, the position-limiting post 31 is aligned with the ignition recess 111, so that the knob stem 3 can be moved further downward at the position to complete ignition, and ignite the long-term open fire.

After the hand is loosened, the knob rod 3 moves upwards under the action of the return spring 32, the limiting column 31 is dislocated with the lower limiting boss 112, and the knob rod 3 can be further rotated anticlockwise.

As shown in fig. 6, in the process that the knob lever 3 rotates counterclockwise from the first angle α 1 to the second angle α 2, the valve core 2 is driven to rotate to the air inlet passage 1a and is simultaneously communicated with the pilot gas passage 1c1 of the open flame and the flame hole 23. The fuel gas is divided into two paths, one path of the fuel gas passes through the air inlet channel 1a, the ventilation cavity 21, the auxiliary barrier groove 23 for long open fire and the auxiliary air channel 1c1 for long open fire and then is discharged through the air outlet channel 1c for long open fire, and the long open fire is still ignited; the other path of gas passes through the gas inlet channel 1a, the ventilation cavity 21, the fire hole 23 and the valve port 10 in sequence and then is discharged through the main gas outlet channel 1b, and the main gas outlet channel 1b can be communicated with a fire row in the gas oven.

Claims

1. A long open fire gas valve comprises a valve body (1) internally provided with a gas inlet channel (1a), a main gas outlet channel (1b) and a long open fire gas outlet channel (1c), wherein a rotatable valve core (2) is arranged in the valve body (1), the lower part of the valve core (2) is provided with a vent cavity (21) with a downward opening, the side wall of the vent cavity (21) is provided with a fire hole (23), a knob rod (3) for driving the valve core (2) to rotate is arranged on the valve body (1) in a penetrating manner, and the knob rod (3) keeps moving upwards; a valve plate (4) for controlling the air outlet quantity of the main air outlet channel (1b) is also arranged in the valve body (1); the method is characterized in that: the valve plate (4) is located below the valve core (2), the valve plate (4) can be driven to move by rotation of the valve core (2), an open flame auxiliary air channel (1c1) communicated with the open flame air outlet channel (1c) is arranged in the valve body (1), an open flame barrier groove (22) is formed in the outer peripheral wall of the valve core (2), and the open flame barrier groove (22) is blocked with the vent cavity (21); the rotation of the valve body (2) can determine whether the air inlet channel (1a) is communicated with the fire hole (23) through the long open fire barrier groove (22) or not, and whether the air inlet channel (1a) is communicated with the long open fire auxiliary air channel (1c1) through the long open fire barrier groove (22) or not.

2. The ever-burning gas valve as set forth in claim 1, wherein:

when the knob rod (3) and the valve core (2) are in the original state, the fire hole (23) is blocked with the main air outlet channel (1b), and the auxiliary air channel (1c1) of the long open fire is blocked with the long open fire barrier groove (22);

in the process that the knob rod (3) rotates to a first angle from an original state, the valve core (2) can be driven to rotate to a position where the air inlet channel (1a) is communicated with the pilot gas channel (1c1) of the pilot gas channel of the pilot gas of the;

in the process that the knob rod (3) continues to rotate from the first angle state to the second angle state, the valve core (2) is driven to rotate to the air inlet channel (1a) and simultaneously is communicated with the pilot gas channel (1c1) of the ever-burning fire and the fire hole (23).

3. The ever-burning gas valve as set forth in claim 2, wherein: and in the process that the knob rod (3) rotates anticlockwise from the first angle to the second angle, the valve plate (4) is driven to move towards the direction of increasing the air output of the main air outlet channel (1 b).

4. The ever-burning gas valve as set forth in claim 3, wherein: the middle part of the main air outlet channel (1b) is provided with a valve port (10), the valve port (10) is positioned under the valve core (2), the valve plate (4) is restrained under the valve port (10) and can move up and down, the opening degree of the valve port (10) can be increased by downward movement of the valve plate (4), and the opening degree of the valve port (10) can be reduced by upward movement of the valve plate (4); in the process that the valve core (2) rotates anticlockwise, the valve plate (4) is driven to move downwards by the rotation of the valve core (2); in the process of clockwise rotation of the valve core (2), the valve plate (4) is driven to move upwards by the rotation of the valve core (2).

5. The ever-burning gas valve as set forth in claim 4, wherein: an auxiliary air passage (1d) is arranged in the valve body (1), an air inlet (1d1) of the auxiliary air passage (1d) is positioned above the valve port (10), an air outlet (1d2) of the auxiliary air passage (1d) is positioned below the valve port (10), and under the state that the valve plate (4) closes the valve port (10), the fuel gas coming out of the fire hole (23) can only be communicated with the outlet end of the main air outlet channel (1b) through the auxiliary air passage (1 d); an adjusting fluid (13) used for adjusting the air output of the auxiliary air passage (1d) vertically penetrates through the auxiliary air passage (1 d).

6. The ever-burning gas valve as set forth in claim 5, wherein: the valve block (4) is fixed in the middle of an adjusting rod (7), the upper part of the adjusting rod (7) is inserted into an inner cutting groove (24) at the lower end of the valve core (2), the valve core can move up and down relative to the adjusting rod (7) and the rotation of the valve core can drive the adjusting rod (7) to rotate, a threaded hole (71) with a downward opening is formed in the bottom of the adjusting rod (7), a threaded column (61) is fixed at the bottom in the valve body (1), and the threaded column (61) is located below the adjusting rod (7) and is inserted into the threaded hole (71) and connected with the threaded hole; the valve body (1) bottom is worn to establish and is fixed with power unit (6), screw thread post (61) set up on this power unit (6), and power unit (6) can reciprocate through expend with heat and contract with cold, the below of valve block (4) is equipped with auxiliary spring (62).

7. The ever-burning gas valve as set forth in claim 2, wherein: the valve body (1) comprises a valve seat (11) and a valve cover (12) fixed on the valve seat (11), the inner top surface of the valve cover (12) is provided with a limiting groove (121) and an upper limiting boss (122), the top surface of the inner hole of the valve seat (11) is provided with an ignition groove (111) and a lower limiting boss (112), and the knob rod (3) is provided with a laterally convex limiting column (31); when the knob rod (3) is in an original state, the limiting column (31) keeps the trend of being clamped into the limiting groove (121); after the knob rod (3) is pressed down at the original position, the lower limiting boss (112) shifts the limiting column (31) to prevent the knob rod (3) from rotating clockwise; in the state that the knob rod (3) rotates to a first angle (alpha 1) from the original state, the limiting column (31) is aligned with the ignition groove (111), so that the knob rod (3) can be further moved downwards in the position state to finish ignition; the knob rod (3) is blocked from further anticlockwise rotating when the limiting column (31) and the upper limiting boss (122) are in a gear state.

8. The ever-burning gas valve as set forth in claim 1, wherein: the fire hole (23) comprises two hole parts (231) which are positioned on the side wall of the valve core (2) and communicated with the vent cavity (21) and a main fire barrier groove (232) which is positioned on the peripheral wall of the valve core (2), the main fire barrier groove (232) is blocked with the vent cavity (21), and two ends of the main fire barrier groove (232) are communicated with the hole parts (231).

9. The ever-burning gas valve as set forth in claim 8, wherein: the cross section of the air inlet channel (1a) is in a strip shape with a port (1a1) communicated with a cavity in which the valve core (2) is installed in the valve body (1).

10. The ever-burning gas valve as set forth in claim 1, wherein: be equipped with in valve body (1) and be used for safety solenoid valve (8), safety solenoid valve (8) with case (2) interval sets up and is located inlet channel (1a), wear to be equipped with ejector pin (9) on valve body (1), the ability trigger that moves down of ejector pin (9) safety solenoid valve (8), the cover is equipped with spring (91) that makes ejector pin (9) keep moving up the trend on ejector pin (9), cover is established on knob pole (3) and can be driven plate (92), and drive plate (92) can be rotatory around self axis along with knob pole (3) axial displacement but knob pole (3) can be relative drive plate (92).