CN212377363U - Gas valve with optimized structure and capable of realizing long-time open fire function - Google Patents

Abstract

The utility model relates to a gas valve with optimized structure and capable of realizing the function of ever-burning fire, which comprises a valve body internally provided with an air inlet channel, an air outlet channel and an ever-burning fire air outlet channel, wherein a valve core is arranged in the valve body, the lower part of the valve core is provided with a ventilation cavity, the side wall of the ventilation cavity is provided with a fire hole, and a knob rod is arranged on the valve body in a penetrating way; a valve plate is also arranged in the valve body; the method is characterized in that: the valve plate is positioned below the valve core, the peripheral wall of the valve core is provided with an ever-burning open fire barrier groove, the ever-burning open fire barrier groove is blocked with the vent cavity, and the ever-burning open fire air outlet channel can be communicated with the vent cavity through an inner cutting groove with a downward opening on the side wall of the valve core; the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole or not, whether the air inlet channel is communicated with the ever-open fire air outlet channel through the ever-open fire barrier groove or not, and whether the ever-open fire air outlet channel is communicated with the inner tangent groove or not can be determined by the rotation of the valve core. The gas valve does not need to be additionally provided with a gear clutch structure, simplifies the structure and greatly reduces the cost.

Description

Gas valve with optimized structure and capable of realizing long-time open fire function

Technical Field

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

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 setting of separation and reunion structure directly leads to the cost of valve to be high, and separation and reunion gear structure requires high to product precision and assembly, lacks the competitiveness.

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 has the gas valve of ever-burning fire function is provided to above-mentioned prior art current situation, only ever-burning fire passageway ventilates earlier when guaranteeing to arrange the ignition down, and the passageway of giving vent to anger is not ventilated, and ever-burning fire is lighted earlier promptly, then turns to the knob pole again, lets out the passageway and ventilate and accomplish down to arrange the ignition of burning fire.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a structure-improved gas valve with a long open fire function comprises a valve body, wherein the valve body is internally provided with a gas inlet channel, a gas outlet channel and a long open fire gas outlet channel, 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 vent cavity is communicated with the gas outlet channel, 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 manner, and the knob rod keeps moving upwards; a valve plate for controlling the air outlet quantity of the 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 rotation of the valve core, an ever-open fire air outlet channel communicated with the ever-open fire air outlet channel is arranged in the valve body, and an ever-open fire barrier groove is formed in the peripheral wall of the valve core, wherein the ever-open fire barrier groove is blocked with the vent cavity, and the ever-open fire air outlet channel can be communicated with the vent cavity through an inner cutting groove with a downward opening in the side wall of the valve core; the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole or not, whether the air inlet channel is communicated with the ever-open fire air outlet channel through the ever-open fire barrier groove or not, and whether the ever-open fire air outlet channel is communicated with the inner tangent groove or not can be determined by the rotation of the valve core.

As a specific preferred gas path control mode, when the knob rod and the valve core are in an original state, the gas outlet channel, the ever-burning fire gas outlet channel and the fire hole are all blocked from the gas inlet channel; 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 long open fire air outlet channel through the long open 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 state, the valve core is driven to rotate to the position where the air inlet channel and the ever-burning fire rampart groove are blocked, meanwhile, the air inlet channel and the fire hole are in a communicated state, and the ever-burning fire air outlet channel and the internal cutting groove are in a communicated state. The gas inlet channel is communicated with the fire hole, and meanwhile, the gas is communicated with the pilot fire gas outlet channel through the inner cutting groove, so that the pilot fire is ignited and the pilot fire gas outlet channel is not interrupted.

Preferably, the middle part of the air outlet channel is provided with a valve port communicated with the vent cavity, the valve port is positioned right below the valve core, the valve plate is constrained 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 is closed, the gas coming out of the fire hole can only be communicated with an outlet end of the 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 air outlet channel can only flow out from the outlet end of the air outlet channel through the auxiliary air channel, so that the fire 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. Power component passes through heat-conducting component and is connected with the temperature sensing stick, there is temperature sensing oil inside the power component, through expend with heat and contract with cold and drive reciprocating of power component, reach the uniform temperature when the hot row temperature, the temperature sensing stick conducts the heat for temperature sensing oil through heat-conducting component, power component 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 air outlet channel of control, because of power component the range that moves up under the expend with heat 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, a rotary limiting disc is fixed on a knob rod, and the rotary limiting disc is provided with a limiting block with a side protrusion; when the knob rod is in an original state, the limiting block on the rotating limiting disc keeps the trend of being clamped into the limiting groove, and the knob rod can only be rotated 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 block to prevent the knob rod from rotating clockwise; under the condition that the knob rod rotates to a first angle from the original state, the limiting block 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 limiting block and the upper limiting boss are in a gear state, so that the knob rod is blocked from further anticlockwise rotating. 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 valve rod cannot trigger the ignition switch, when the valve core reaches the first angle position, due to the arrangement of the ignition groove, the valve rod cannot rotate further by combining with the blocking of the lower limiting boss, the valve rod can move further downward sufficiently, the ignition switch is triggered, the ignition can be ensured only when the long-time open fire 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, and the limiting block and the lower limiting boss are staggered and can further rotate anticlockwise to adjust the fire.

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 if the knob rod presses down the safety electromagnetic valve, the air source main switch can be opened, if the knob rod is not pressed down 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 ever-burning open fire barrier groove which is blocked with the vent cavity, and the ever-burning open fire air outlet channel can be communicated with the vent cavity through the internal cutting groove with a downward opening on the side wall of the valve core; the rotation of the valve core can determine whether the air inlet channel is communicated with the fire hole or not, whether the air inlet channel is communicated with the ever-open fire air outlet channel through the ever-open fire barrier groove or not, and whether the ever-open fire air outlet channel is communicated with the inner tangent groove or not can be determined by the rotation of the valve core. The valve plate can be arranged below the valve core, the valve plate can be driven to move by rotation of the valve core, the air inlet channel is communicated with the ever-burning flame air outlet channel through the ever-burning flame barrier groove or is communicated with the ever-burning flame air outlet channel through the internal cutting groove, the vent cavity and the fire hole, the ever-burning flame is ensured to be ignited first, meanwhile, the ever-burning flame is in an ignition state in the whole process, a gear clutch structure is not required to be additionally arranged, the structure is simplified, and the cost is greatly reduced. And the related channels in the gas valve are few, and the structure is simpler.

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 of an embodiment of the present invention;

FIG. 4 is a cross-sectional view (original state) of the valve of the embodiment of the present invention along the central axis of the outlet channel of the ever-burning fire;

fig. 5 is a sectional view of the valve according to the embodiment of the present invention along the central axis of the outlet channel of the ever-burning fire (rotated to a second angular position);

fig. 6 is a schematic perspective view of a valve element in a valve according to an embodiment of the present invention;

fig. 7 is a schematic view of a three-dimensional structure 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 seat in a valve according to an embodiment of the present invention;

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

fig. 10 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 10, it is a preferred embodiment of the present invention.

The gas valve with the optimized structure and capable of realizing the function of long open fire comprises a valve body 1 with an air inlet channel 1a, an air outlet channel 1b and an air outlet channel 1c inside, wherein a rotatable valve core 2 is arranged in the valve body 1, a vent cavity 21 with a downward opening is arranged at the lower part of the valve core 2, the vent cavity 21 is communicated with the air outlet channel 1b, a fire hole 24 is formed in the side wall of the vent cavity 21, 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 under the action of a return spring 32; and a valve plate 4 for controlling the air output of the air outlet channel 1b is also arranged in the valve body 1. 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 valve plate 4 is positioned below the valve core 2, the valve core 2 can drive the valve plate 4 to move through rotation, an open flame gas outlet channel 1c communicated with the open flame gas outlet channel 1c is arranged in the valve body 1, and an open flame barrier groove 22 is arranged on the outer peripheral wall of the valve core 2, wherein the open flame barrier groove 22 is blocked with the vent cavity 21, and the open flame gas outlet channel 1c can be communicated with the vent cavity 21 through an inner cutting groove 23 with a downward opening on the side wall of the valve core 2; the rotation of the valve core 2 can determine whether the air inlet channel 1a is communicated with the fire hole 24 or not, whether the air inlet channel 1a is communicated with the ever-open fire air outlet channel 1c through the ever-open fire barrier groove 22 or not, and the rotation of the valve core 2 can also determine whether the ever-open fire air outlet channel 1c is communicated with the internal cutting groove 23 or not.

When the knob rod 3 and the valve core 2 are in the original state, the fire holes 24 of the air outlet channel 1b and the long open fire air outlet channel 1c are blocked from the air inlet channel 1 a.

In the process that the knob rod 3 rotates to a first angle alpha 1 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 long open fire air outlet channel 1c through the long open fire barrier groove 22, and meanwhile, the air inlet channel 1a and the fire hole 24 are in a blocking state;

in the process that the knob rod 3 continues to rotate from the first angle alpha 1 state to the second angle alpha 2, the valve core 2 is driven to rotate to the position where the air inlet channel 1a is blocked from the long open fire barrier groove 22, the air inlet channel 1a is communicated with the fire hole 24, and meanwhile, the long open fire air outlet channel 1c is communicated with the inner tangent groove 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 air outlet channel 1 b.

The middle part of the air outlet channel 1b is provided with a valve port 10 which is used for being communicated with the air vent cavity 21, the valve port 10 is positioned under the valve core 2, the valve plate 4 is restricted under the valve port 10 and can move up and down, the opening degree of the valve port 10 is increased by the downward movement of the valve plate 4, and the opening degree of the valve port 10 is reduced by the 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 24 can only be communicated with the outlet end of the 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 23 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 located below the adjusting rod 7 and is inserted 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 10 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 reciprocate according to the expend with heat and contract with cold production of inside temperature sensing oil, 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 valve block 4 upper and lower position, control outlet channel 1 b's the gas output. 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 24 can only be communicated with the outlet end of the 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, the knob rod 3 is fixed with a rotary limiting disc 31, and the rotary limiting disc 31 is provided with a side convex limiting block 311; when the knob rod 3 is in the original state, the limiting block 311 on the limiting disc 31 is rotated to keep the tendency 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 block 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 block 311 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 stopper 311 and the upper stopper boss 122 are shifted to block the knob lever 3 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 down, the limiting block 311 is separated from the limiting groove 121 for constraint, the driving plate 92 moves down along with the knob rod 3, the ejector rod 9 overcomes the elasticity of the spring 91 and moves down to trigger the safety electromagnetic valve 8, and the air source main switch is opened.

The lower limiting boss 112 shifts the limiting block 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 α 1, the first angle α 1 in the embodiment is 50 degrees, so as to drive the valve core 2 to rotate until the air inlet channel 1a is communicated with the open flame air outlet channel 1c through the open flame barrier groove 22, and meanwhile, the air inlet channel 1a is blocked from the flame hole 24; the gas passes through the gas inlet channel 1a, the ventilation cavity 21 and the long open fire barrier groove 22 in sequence and then is discharged through the long open fire gas outlet channel 1c, and the fire hole 24 is still blocked with the gas outlet channel 1b, so that the gas outlet channel 1b is ensured to be in a gas-cut-off state; the ignition switch is not triggered at this time.

When the knob rod 3 is at the first angle α 1 position, the stopper 311 is aligned with the ignition recess 111, so that the knob rod 3 can be moved further downward at the position to complete ignition, and open flame can be ignited.

After the hand is loosened, the knob rod 3 moves up under the action of the return spring 32, the limit block 311 is dislocated with the lower limit boss 112, and the knob rod 3 can be further rotated counterclockwise.

In the process that the knob rod 3 rotates anticlockwise from the first angle alpha 1 to the second angle alpha 2, the valve core 2 is driven to rotate until the air inlet channel 1a is blocked with the long open fire air outlet channel 1c, the air inlet channel 1a is communicated with the fire hole 24, and meanwhile, the long open fire air outlet channel 1c is communicated with the inner tangent groove 23. The fuel gas is divided into two paths, one path of the fuel gas passes through the gas inlet channel 1a, the vent cavity 21, the inner notch 23 and the long open fire gas outlet channel 1c and then is discharged through the long open fire gas outlet channel 1d, and the long open fire is still ignited, as shown in fig. 5; the other path of gas passes through the gas inlet channel 1a, the ventilation cavity 21, the fire hole 24 and the valve port 10 in sequence and then is discharged through the gas outlet channel 1b, and the gas outlet channel 1b can be communicated with a fire outlet in the gas oven.

Claims (10)

1. A gas valve with an optimized structure and capable of achieving a long open fire function comprises a valve body (1) with an air inlet channel (1a), an air outlet channel (1b) and a long open fire air outlet channel (1c) inside, wherein a rotatable valve core (2) is arranged in the valve body (1), a downward-opening ventilation cavity (21) is formed in the lower portion of the valve core (2), the ventilation cavity (21) is communicated with the air outlet channel (1b), a fire hole (24) is formed in the side wall of the ventilation cavity (21), a knob rod (3) used for driving the valve core (2) to rotate penetrates through the valve body (1), and the knob rod (3) keeps moving upwards; a valve plate (4) for controlling the air outlet quantity of the air outlet channel (1b) is also arranged in the valve body (1); the method is characterized in that: the valve plate (4) is positioned below the valve core (2), the valve plate (4) can be driven to move by the rotation of the valve core (2), a long open fire barrier groove (22) is formed in the peripheral wall of the valve core (2), the long open fire barrier groove (22) is blocked with the vent cavity (21), and the long open fire air outlet channel (1c) can be communicated with the vent cavity (21) through an inner cutting groove (23) with a downward opening in the side wall of the valve core (2); the rotation of the valve core (2) can determine whether the air inlet channel (1a) is communicated with the fire hole (24) or not, whether the air inlet channel (1a) is communicated with the ever-open fire air outlet channel (1c) through the ever-open fire barrier groove (22) or not, and the rotation of the valve core (2) can also determine whether the ever-open fire air outlet channel (1c) is communicated with the internal cutting groove (23) or not.

2. The structurally optimized gas valve capable of achieving the long open flame function according to claim 1, wherein:

when the knob rod (3) and the valve core (2) are in the original state, the air outlet channel (1b), the long open fire air outlet channel (1c) and the fire hole (24) are all blocked from the air inlet channel (1 a);

in the process that the knob rod (3) rotates to a first angle (alpha 1) 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 long open fire air outlet channel (1c) through the long open fire barrier groove (22), and meanwhile, the air inlet channel (1a) and the fire hole (24) are in a blocking state;

in the process that the knob rod (3) continues to rotate from the state of the first angle (alpha 1) to the state of the second angle (alpha 2), the valve core (2) is driven to rotate to the position where the air inlet channel (1a) is blocked by the ever-burning open fire barrier groove (22), meanwhile, the air inlet channel (1a) is communicated with the fire hole (24), and the ever-burning open fire air outlet channel (1c) is communicated with the internal cutting groove (23).

3. The structurally optimized gas valve capable of achieving the long open flame function according to claim 2, wherein: and 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 which increases the air output of the air outlet channel (1 b).

4. The structurally optimized gas valve capable of achieving the long open flame function according to claim 3, wherein: the middle part of the air outlet channel (1b) is provided with a valve port (10) communicated with a vent cavity (21), the valve port (10) is positioned under the valve core (2), the valve plate (4) is restricted under 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 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 structurally optimized gas valve capable of achieving the long open flame function according to claim 4, is characterized in that: the gas valve is characterized in that an auxiliary air passage (1d) is arranged in the valve body (1), an air inlet (1d1) of the auxiliary air passage (1d) is located above the valve port (10), an air outlet (1d2) of the auxiliary air passage (1d) is located below the valve port (10), and when the valve plate (4) is closed and the valve port (10) is closed, gas coming out of the fire hole (24) can only be communicated with an outlet end of the air outlet channel (1b) through the auxiliary air passage (1 d).

6. The structurally optimized gas valve capable of achieving the long open flame function according to claim 5, is characterized in that: 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).

7. The structurally optimized gas valve capable of achieving the long open flame function according to claim 5, is characterized in that: valve block (4) are fixed in the middle part of an regulation pole (7), and the upper portion of adjusting pole (7) is inserted in the interior grooving of case (2) lower extreme, and the case can adjust pole (7) relatively and reciprocate and the rotation of case can drive the rotation of adjusting pole (7), and open the bottom of adjusting pole (7) has opening screw hole (71) down, bottom in valve body (1) is fixed with screw thread post (61), and screw thread post (61) are located the below of adjusting pole (7) and insert threaded connection in screw hole (71).

8. The structurally optimized gas valve capable of achieving the long open flame function according to claim 7, wherein: 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).

9. The structurally optimized gas valve capable of achieving the long open flame function according to 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 an inner hole of the valve seat (11) is provided with an ignition groove (111) and a lower limiting boss (112), a rotary limiting disc (31) is fixed on the knob rod (3), and the rotary limiting disc (31) is provided with a side-convex limiting block (311); when the knob rod (3) is in an original state, the limiting block (311) on the rotary limiting disc (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 block (311) to prevent the knob rod (3) from rotating clockwise; under the condition that the knob rod (3) rotates to a first angle (alpha 1) from the original state, the limiting block (311) 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 limiting block (311) and the upper limiting boss (122) are in a gear state, and the knob rod (3) is blocked from further rotating anticlockwise.

10. The structurally optimized gas valve capable of achieving the long open flame function according to 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).

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