CN115218000A

CN115218000A - Plug valve and stove with same

Info

Publication number: CN115218000A
Application number: CN202210909045.5A
Authority: CN
Inventors: 邓志亮; 邓飞忠; 吴亭; 刘华荣; 谭卓鑫; 欧伟成; 潘叶江
Original assignee: Vatti Co Ltd
Current assignee: Vatti Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-10-21

Abstract

The invention provides a plug valve and a stove with the same, belonging to the technical field of infrared gas stoves, the plug valve comprises a valve body, a valve core, a valve cover, a valve rod and a regulating and controlling assembly, wherein the valve body is provided with a cavity, an air inlet channel and an air outlet pipe, the air inlet channel and the air outlet pipe are both communicated with the cavity, and the air outlet pipe is provided with a nozzle; the valve core is arranged in the cavity and used for opening or closing the air outlet pipe; the valve cover is connected with the valve body and used for sealing the cavity; the valve rod is connected with the valve core and penetrates through the valve cover to extend to the outside of the valve body and be used for driving the valve core to rotate; one side of the regulating and controlling component is connected with the valve rod, and the other side of the regulating and controlling component is connected with the air outlet pipe, so that the proportion of oxygen in the nozzle is changed when the nozzle is ignited, and the proportion of oxygen in the nozzle is not influenced when the nozzle is not ignited. By arranging the regulating and controlling assembly, the gas proportion is improved during ignition, instant ignition is realized, and the ignition success rate is improved; when the gas stove is not ignited, sufficient oxygen can be provided, and the requirements of the gas stove on different gas sources are met.

Description

Plug valve and stove with same

Technical Field

The invention relates to the technical field of infrared gas stoves, in particular to a plug valve and a stove with the same.

Background

Along with the improvement of living standard, gas appliances including household gas cookers, heaters, barbecue ovens and the like become more and more indispensable appliances in people's life, and infrared gas burners have the advantages of energy conservation, environmental protection, cleanness, sanitation, safety, reliability and the like, are accepted by most of household consumers, because the combustion mode of the infrared gas burners is completely premixed combustion and is premixed to 1.03-1.10 times of the air quantity required by complete combustion, complete combustion is realized, the energy utilization rate is high, less harmful gas (carbon monoxide and nitrogen monoxide) is generated, the thermal efficiency of the infrared gas cookers is higher than that of atmospheric gas burners, because the infrared gas burners adopt primary air coefficients which are much larger than that of the atmospheric gas burners (0.5-0.7), and a furnace chamber in which the gas of the burners is mixed with the primary air, after partial air in the furnace chamber of the burners is evacuated, the mixed gas reaches ignition concentration, the burners can normally ignite and burn, so that the infrared gas burners are low in concentration and difficult to ignite, especially when the ceramic is used, the infrared gas burners are difficult to be ignited, the infrared gas burners are difficult to be used, and the infrared gas burners are difficult to be used, so that the infrared gas burners are not easy to be used, and the infrared gas burners are not easy to be used.

Disclosure of Invention

The invention aims to provide a plug valve, a plug valve and a stove, wherein the plug valve is provided with a regulating and controlling component, so that the gas proportion is improved during ignition, instant ignition is realized, and the ignition success rate is improved; when the gas stove is not ignited, sufficient oxygen can be provided, and the requirements of the stove on different gas sources are met.

The invention aims to provide a stove.

In order to realize the purpose of the invention, the invention adopts the following technical scheme:

according to one aspect of the present invention, a plug valve is provided. The plug valve includes:

the valve body is provided with a cavity, an air inlet channel and an air outlet pipe, wherein the air inlet channel and the air outlet pipe are both communicated with the cavity, and the air outlet pipe is provided with a nozzle;

the valve core is arranged in the cavity and used for opening or closing the air outlet pipe;

the valve cover is connected with the valve body and used for sealing the cavity;

the valve rod is connected with the valve core, penetrates through the valve cover, extends to the outside of the valve body and is used for driving the valve core to rotate;

and one side of the regulating and controlling component is connected with the valve rod, and the other side of the regulating and controlling component is connected with the air outlet pipe, so that the proportion of oxygen in the nozzle is changed during ignition, and the proportion of oxygen in the nozzle is not influenced during non-ignition.

According to an embodiment of the present invention, the regulating member comprises:

a sleeve which is sleeved on the air outlet pipe,

a pushing component fixedly connected with the sleeve,

the nozzle is provided with a nozzle air inlet hole at the periphery, and the pushing assembly pushes the sleeve to shield the nozzle air inlet hole so as to change the supply amount of oxygen to the nozzle.

According to an embodiment of the invention, the pushing assembly comprises:

the cam is sleeved on the periphery of the valve rod and is positioned on the periphery of the valve cover;

a pushing plate, one side of which is fixedly connected with the sleeve and the other side of which is matched with the cam to push the pushing plate to move linearly,

wherein, when in ignition, the cam is contacted with the pushing plate; when the ignition is not performed, the cam is not in contact with the pushing plate.

According to an embodiment of the present invention, the pushing plate is zigzag-shaped, including:

the first straight line section is fixedly connected to the periphery of the sleeve;

one end of the second straight line segment is vertically connected with the first straight line segment;

one end of the third straight line section is vertically connected to the other end of the second straight line section, and the other end of the third straight line section is tangent to the periphery of the cam, so that the periphery of the cam is abutted to the third straight line section during ignition;

the other end of the third straight line section is folded towards the direction far away from the cam, and the folded edge is not in contact with the cam, so that the pushing plate is not in contact with the cam when the ignition is not performed.

According to an embodiment of the invention, the pushing assembly further comprises:

the fixing support is sleeved on the air outlet pipe and is positioned between the cam and the sleeve, and a threaded hole is formed in the fixing support;

and the screw rod is in threaded connection with the threaded hole, and the pushing plate is sleeved on the periphery of the screw rod to move linearly along the screw rod.

According to an embodiment of the present invention, a fixing block for connecting the screw rod is installed on an inner side of the second straight line segment, the fixing block is provided with a first through hole, the first straight line segment is provided with a second through hole corresponding to the fixing block through hole, and the screw rod passes through the first through hole and the second through hole, so that the pushing plate is sleeved on an outer periphery of the screw rod;

the outer diameter of the first through hole and the outer diameter of the second through hole are both larger than the outer diameter of the screw rod, so that the pushing plate can move linearly along the screw rod.

According to an embodiment of the invention, the regulating assembly further comprises:

the reset spring is sleeved on the screw rod, one end of the reset spring is abutted to the pushing plate, and the other end of the reset spring is connected to the fixed support, wherein when the ignition is not started, the reset spring pushes the pushing plate, so that the sleeve is reset.

According to one embodiment of the invention, a cam spring is arranged between the cam and the valve cover, so that the cam is separated from the push plate when the cam is not ignited;

the outer side of the cam is provided with a clamp spring, and the position of the cam is limited through the cam spring and the clamp spring, so that the cam is in contact with the pushing plate.

According to an embodiment of the present invention, an axis of the outlet pipe is perpendicular to an axis of the valve stem, so that an outer circumference of the cam contacts the push plate.

According to another aspect of the present invention, there is provided a hob including:

the plug valve as described above;

a burner;

wherein, the outlet duct intercommunication of plug valve in the input of combustor.

One embodiment of the present invention has the following advantages or benefits:

according to the plug valve and the stove with the plug valve, the regulating and controlling assembly is arranged, so that the gas proportion is increased during ignition, instant ignition is realized, and the ignition success rate is increased; in a non-ignition state, sufficient oxygen can be provided, and the requirements of the cooker on different gas sources are met.

Drawings

The above and other features and advantages of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

FIG. 1 is a schematic illustration of a plug valve shown according to an exemplary embodiment.

FIG. 2 is an exploded view of a plug valve shown in accordance with an exemplary embodiment.

FIG. 3 is a front view of a plug valve shown in accordance with an exemplary embodiment.

FIG. 4 is a cross-sectional view of a plug valve shown in accordance with an exemplary embodiment.

FIG. 5 is a schematic view of a cooktop shown according to an exemplary embodiment.

Wherein the reference numerals are as follows:

1. a valve body; 11. an air outlet pipe; 12. a nozzle; 121. a nozzle inlet;

2. a valve cover;

3. a valve stem;

4. a regulatory component; 41. a sleeve; 42. a pushing assembly; 421. a cam; 4211. a cam spring; 4212. a clamp spring; 422. a push plate; 4221. a first straight line segment; 4222. a second straight line segment; 4223. a third straight line segment; 4224. folding edges; 4225. a fixed block; 423. fixing a bracket; 424. a screw;

5. a burner.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus a detailed description thereof will be omitted.

The terms "a," "an," "the," "said" are used to indicate the presence of one or more elements/components/etc.; the terms "comprising" and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in fig. 1 to 5, fig. 1 shows a schematic view of a plug valve provided by the present invention. Figure 2 shows an exploded view of a plug valve provided by the present invention. FIG. 3 illustrates a front view of a plug valve provided by the present invention. FIG. 4 shows a cross-sectional view of a plug valve provided by the present invention. Fig. 5 shows a schematic view of a cooktop provided by the present invention.

The plug valve of the embodiment of the invention comprises:

the valve body 1 is provided with a cavity, an air inlet channel and an air outlet pipe 11, wherein the air inlet channel and the air outlet pipe 11 are both communicated with the cavity, and the air outlet pipe 11 is provided with a nozzle 12;

the valve core is arranged in the cavity and used for opening or closing the air outlet pipe 11;

the valve cover 2 is connected with the valve body 1 and used for sealing the cavity;

the valve rod 3 is connected with the valve core, penetrates through the valve cover 2, extends to the outside of the valve body 1 and is used for driving the valve core to rotate;

and the regulating and controlling assembly 4 is connected with the valve rod 3 on one side and the air outlet pipe 11 on the other side, so that the proportion of oxygen in the nozzle 12 is changed during ignition, and the proportion of oxygen in the nozzle 12 is not influenced during non-ignition.

The valve body 1 is provided with two air outlet pipes 11, the two air outlet pipes 11 are respectively an outer ring air outlet pipe and an inner ring air outlet pipe, the valve rod 3 drives the valve core to rotate so as to open or close the two air outlet pipes 11, the two air outlet pipes 11 are respectively communicated with an outer ring channel and an inner ring channel of the combustor 5, and the proportion of gas output by the two air outlet pipes 11 is controlled by the regulating and controlling component 4, so that the proportion of gas in the combustor 5 can be regulated and controlled;

the regulating and controlling component 4 can be arranged on the inner ring air outlet pipe or the outer ring air outlet pipe, when the combustor 5, particularly an inner ring channel of an infrared combustor, needs a larger gas proportion, the regulating and controlling component 4 can be arranged on the inner ring air outlet pipe, the gas use requirement of the combustor 5 is met by reducing the oxygen proportion sprayed by the nozzle 12 on the inner ring air outlet pipe, similarly, when the gas proportion output by the outer ring air outlet pipe needs to be improved, the regulating and controlling component 4 can be arranged on the outer ring air outlet pipe, or the regulating and controlling components 4 are arranged on the two air outlet pipes 11 simultaneously, and the gas proportion of one of the two gas outlet pipes can be controlled simultaneously or respectively, in the embodiment, the regulating and controlling component 4 can change the supply amount of primary air of the nozzle 12 during ignition, so that the gas proportion sprayed by the nozzle 12 is improved, instant ignition is realized, and the ignition success rate is improved; when the gas stove is not ignited, the supply amount of primary air of the nozzle 12 can not be influenced, so that the gas can be fully combusted, and the combustion performance of the gas stove can be improved. The invention can meet the requirements of the gas source in different stages of the stove, can also meet the requirements of different stoves, and has wide application range.

In a preferred embodiment of the present invention, the regulatory component 4 comprises:

a sleeve 41 which is sleeved on the air outlet pipe 11,

the pushing component 42 is fixedly connected with the sleeve 41,

wherein, the nozzle 12 is provided with a nozzle inlet hole 121 on the periphery, and the pushing assembly 42 pushes the sleeve 41 to shield the nozzle inlet hole 121, so as to change the oxygen supply amount to the nozzle 12.

As shown in fig. 1 to 4, the nozzle 12 is provided with a nozzle inlet hole 121 on the periphery thereof, and the pushing assembly 42 pushes the sleeve 41 to shield the nozzle inlet hole 121, so as to change the supply amount of oxygen to the nozzle 12, which is specifically the supply amount of primary air in this embodiment, and may be other oxygen sources, as long as the ratio of the fuel gas and the oxygen gas ejected from the nozzle 12 can be adjusted and controlled.

In a preferred embodiment of the present invention, the pushing assembly 42 comprises:

the cam 421 is sleeved on the periphery of the valve rod 3 and is positioned on the periphery of the valve cover 2;

a pushing plate 422, one side of which is fixed on the sleeve 41 and the other side of which is matched with the cam 421 to push the pushing plate 422 to move linearly,

wherein, when igniting, the cam 421 contacts with the pushing plate 422; when not igniting, the cam 421 does not contact the push plate 422.

As shown in fig. 1-4, a cam through hole is formed in the cam 421, the valve rod 3 penetrates through the cam 421 through hole, and the valve rod 3 is in clearance fit with the cam through hole, so that the cam 421 is clamped in the cam through hole, and the cam 421 can operate along with the valve rod 3. When the gas burner is ignited, the valve rod 3 is pressed, the valve rod 3 drives the cam 421 to approach the valve cover 2, at this time, the periphery of the cam 421 contacts with the pushing plate 422, then, the cam 421 rotates along with the valve rod 3, and simultaneously, the rotation of the cam 421 can push the pushing plate 422 to move left and right.

The push plate 422 is Z-shaped, including:

a first straight line segment 4221 fixedly connected to the periphery of the sleeve 41;

a second straight segment 4222 vertically connected at one end to first straight segment 4221;

a third straight line segment 4223, one end of which is vertically connected to the other end of the second straight line segment 4222, and the other end of which is tangent to the periphery of the cam 421, so that the periphery of the cam 421 abuts against the third straight line segment 4223 during ignition;

the other end of the third straight line segment 4223 is folded towards the direction away from the cam 421, and the folded edge 4224 is not in contact with the cam 421, so that the push plate 422 is not in contact with the cam 421 during non-ignition.

As shown in fig. 1-4, the pushing plate 422 is Z-shaped and includes a first linear segment 4221, a second linear segment 4222 and a third linear segment 4223, wherein the first linear segment 4221 is fixedly connected to the outer periphery of the sleeve 41, the second linear segment 4222 connects the first linear segment 4221 and the third linear segment 4223, and the third linear segment 4223 is provided with a folding edge 4224. When the valve is ignited, the cam 421 approaches the valve cover 2 along with the valve rod 3, so that the periphery of the cam 421 abuts against the third straight-line segment 4223, the cam 421 rotates leftwards to push the third straight-line segment 4223 to move leftwards, when the cam 421 rotates 90 degrees, the third straight-line segment 4223 moves to the farthest left end, the sleeve 41 completely shields the nozzle air inlet hole 121, the primary air supply amount of the nozzle air inlet hole 121 is reduced, the gas ratio sprayed out by the nozzle 12 is improved, and the ignition success rate is improved. When the ignition is successful, the cam 421 returns to the initial position, the folding edge 4224 is not in contact with the cam 421, and the movement of the cam 421 does not influence the primary air supply amount of the nozzle air inlet holes 121. In addition, the flap 4224 can facilitate the insertion of the cam 421 into the third linear segment 4223.

In a preferred embodiment of the present invention, the pushing assembly 42 further comprises:

the fixing bracket 423 is sleeved on the air outlet pipe 11 and is positioned between the cam 421 and the sleeve 41, wherein the fixing bracket 423 is provided with a threaded hole;

the screw rod 424 is threaded in the threaded hole, wherein the pushing plate 422 is sleeved on the periphery of the screw rod 424 to move linearly along the screw rod 424.

A fixing block 4225 for connecting the screw 424 is mounted on the inner side of the second straight line segment 4222, the fixing block 4225 is provided with a first through hole, the first straight line segment 4221 is provided with a second through hole corresponding to the through hole of the fixing block 4225, and the screw 424 penetrates through the first through hole and the second through hole, so that the pushing plate 422 is sleeved on the periphery of the screw 424;

the outer diameters of the first through hole and the second through hole are larger than the outer diameter of the screw rod 424, so that the push plate 422 moves linearly along the screw rod 424.

As shown in fig. 1 to 4, the fixing bracket 423 is located between the first linear segment 4221 and the third linear segment 4223, the screw rod 424 is screwed to the fixing bracket 423, and the screw rod 424 passes through the first through hole and the second through hole, so that the pushing plate 422 moves linearly along the screw rod 424 because the outer diameter of the first through hole and the outer diameter of the second through hole are both larger than the outer diameter of the screw rod 424. In addition, the fixed support 423 can limit the left and right movement range of the push plate 422, so that unnecessary formation is avoided, when the cam 421 is located at the initial position, the sleeve 41 does not shield the nozzle air inlet hole 121 completely, when the cam 421 rotates to rotate by 90 degrees, the nozzle air inlet hole 121 is completely shielded, the gas proportion or the oxygen proportion sprayed by the nozzle 12 is regulated, and the requirements of different cookers on air sources are met.

In a preferred embodiment of the present invention, the regulating assembly 4 further comprises:

the return spring 43 is sleeved on the screw 424, one end of the return spring is abutted against the pushing plate 422, and the other end of the return spring is connected to the fixed support 423, wherein when the ignition is not performed, the return spring 43 pushes the pushing plate 422, so that the sleeve 41 is returned.

As shown in fig. 1-4, the return spring 43 is sleeved on the screw 424, one end of the return spring is abutted to the pushing plate 422, the other end of the return spring is connected to the fixing support 423, the return spring 43 is continuously compressed along with the leftward rotation of the cam 421, when the cam 4211 returns to the original position, i.e., during non-ignition, the cam 421 is not in contact with the pushing plate 422 at this time, the return spring 43 can push the pushing plate 422 to move rightward, so that the sleeve 41 does not shield the nozzle inlet hole 121, and at this time, the valve rod 3 and the cam 421 are rotated, which does not affect the primary air supply amount of the nozzle 12. After ignition is ensured, a sufficient air source can be provided for the nozzle 12, and the combustion performance of the cooker is improved.

In a preferred embodiment of the present invention, a cam spring 4211 is disposed between the cam 421 and the valve cover 2, so that the cam 421 is separated from the push plate 422 when the ignition is not performed;

the cam 421 has a circlip 4212 on the outside, and the cam 421 is contacted with the pushing plate 422 by the cam spring 4211 and the circlip 4212 to define the position of the cam 421.

As shown in fig. 1-4, a cam spring 4211 is disposed between the cam 421 and the valve cap 2, when ignition is performed, the cam 421 approaches the valve cap 2 along with the valve rod 3, the cam spring 4211 is compressed, and after ignition is completed, the cam spring 4211 can push the cam 421 away from the valve cap 2, so that the cam 421 is restored to the original position and is separated from the push plate 422, thereby avoiding affecting the primary air supply amount to the nozzle 12.

In a preferred embodiment of the present invention, the axis of the outlet pipe 11 is perpendicular to the axis of the valve stem 3 so that the outer circumference of the cam 421 contacts the push plate 422.

As shown in fig. 1 to 4, the cam 421 includes an arc section and a convex section, wherein, the arc section is in contact with the pushing plate 422 in an initial state, and at this time, a connection line between a highest point of the convex section and a center of the arc section is perpendicular to an axis of the outlet pipe 11, so that when the cam 421 rotates by 90 °, the pushing plate 422 moves to a position farthest away from the center of the cam 421, that is, the center of the arc section, and this setting can facilitate calculation of a movement stroke of the pushing plate 422, and further, an installation position of the sleeve 41 on the outlet pipe 11 is designed, and the structure is simple and the operation is convenient.

The cooking utensil of the embodiment of the invention comprises:

a plug valve as described in any of the above;

a burner 5;

wherein, the outlet pipe 11 of the plug valve is communicated with the input end of the burner 5.

Wherein, the plug valve is used for controlling the gas inflow of the gas in the burner 5, the cooking utensil in the embodiment comprises the plug valve as any one of the above, and the cooking utensil with the plug valve has the same technical effects because the plug valve has the technical effects.

When the burner is ignited, the valve rod 3 is pressed, the cam 421 moves downwards along with the valve rod, the cam spring 4211 is compressed, the periphery of the cam 421 is contacted with the pushing plate 422, at the moment, the valve rod 3 is rotated to drive the cam 421 to rotate anticlockwise to a position of 90 degrees, the pushing plate 422 moves to the farthest position from left to right at the highest position of the cam 421, at the moment, the pushing plate 422 stops the nozzle air inlet hole 121 of the nozzle 12, at the moment, the once air inlet amount of the nozzle 12 is reduced, the content of fuel gas in the cavity of the burner 5 is rapidly increased, and when the fuel gas overflows above the inner ring or the outer ring of the burner 5, the fuel gas is ignited by high-pressure electric sparks emitted by an ignition needle in the burner 5; after ignition is successful, after hands are released, the cam 421 moves upwards under the action of the elastic force of the cam spring 4211 and is separated from the push plate 422, the push plate 422 pushes the push plate 422 to the right under the action of the return spring 43, at the moment, the nozzle air inlet 121 of the nozzle 12 is completely exposed, and primary air quantity of the nozzle 12 is normally injected, so that fuel gas is fully combusted.

In embodiments of the present invention, the term "plurality" means two or more unless explicitly defined otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly and include, for example, fixed connections, removable connections, or integral connections. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured in a specific orientation, and operate, and thus, should not be construed as limiting the embodiments of the present invention.

In the description herein, the appearances of the phrases "one embodiment," "a preferred embodiment," and similar language, throughout this specification may, but do not necessarily, all refer to the same embodiment or example. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made to the present embodiment by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the embodiments of the present invention should be included in the protection scope of the embodiments of the present invention.

Claims

1. A plug valve, comprising:

the valve body (1) is provided with a cavity, an air inlet channel and an air outlet pipe (11), wherein the air inlet channel and the air outlet pipe (11) are both communicated with the cavity, and the air outlet pipe (11) is provided with a nozzle (12);

the valve core is arranged in the cavity and used for opening or closing the air outlet pipe (11);

the valve cover (2) is connected to the valve body (1) and used for sealing the cavity;

the valve rod (3) is connected to the valve core, penetrates through the valve cover (2), extends to the outside of the valve body (1) and is used for driving the valve core to rotate;

and the regulating and controlling component (4) is connected with the valve rod (3) on one side and the air outlet pipe (11) on the other side, so that the proportion of oxygen in the nozzle (12) is changed when in ignition, and the proportion of oxygen in the nozzle (12) is not influenced when in non-ignition.

2. A plug valve according to claim 1, characterized in that the regulating assembly (4) comprises:

a sleeve (41) sleeved on the air outlet pipe (11),

a pushing component (42) fixedly connected to the sleeve (41),

the nozzle (12) is provided with a nozzle air inlet hole (121) on the periphery, and the pushing assembly (42) pushes the sleeve (41) to shield the nozzle air inlet hole (121) so as to change the supply amount of oxygen to the nozzle (12).

3. The plug valve of claim 2, wherein the pushing assembly (42) comprises:

the cam (421) is sleeved on the periphery of the valve rod (3) and is positioned on the periphery of the valve cover (2);

a pushing plate (422), one side of which is fixedly connected with the sleeve (41), and the other side of which is matched with the cam (421) to push the pushing plate (422) to move linearly,

wherein, when igniting, the cam (421) contacts with the pushing plate (422); when the ignition is not started, the cam (421) is not contacted with the pushing plate (422).

4. A plug valve according to claim 3, wherein the push plate (422) is Z-shaped comprising:

a first straight line segment (4221) fixedly connected to the periphery of the sleeve (41);

a second straight line segment (4222) with one end vertically connected with the first straight line segment (4221);

a third straight line segment (4223), one end of which is vertically connected with the other end of the second straight line segment (4222), and the other end of which is tangent to the periphery of the cam (421), so that when the ignition is performed, the periphery of the cam (421) abuts against the third straight line segment (4223);

the other end of the third straight line segment (4223) is folded towards a direction away from the cam (421) to form a fold (4224), and the fold (4224) is not in contact with the cam (421) so that the push plate (422) is not in contact with the cam (421) when the ignition is not performed.

5. The plug valve of claim 4, wherein the push assembly (42) further comprises:

the fixing support (423) is sleeved on the air outlet pipe (11) and is positioned between the cam (421) and the sleeve (41), and the fixing support (423) is provided with a threaded hole;

and the screw rod (424) is in threaded connection with the threaded hole, wherein the pushing plate (422) is sleeved on the periphery of the screw rod (424) so as to move linearly along the screw rod (424).

6. The plug valve according to claim 5, characterized in that a fixing block (4225) for connecting the screw rod (424) is installed at the inner side of the second straight line segment (4222), the fixing block (4225) is provided with a first through hole, the first straight line segment (4221) is provided with a second through hole corresponding to the through hole of the fixing block (4225), and the screw rod (424) passes through the first through hole and the second through hole, so that the pushing plate (422) is sleeved on the periphery of the screw rod (424);

wherein the outer diameter of the first through hole and the outer diameter of the second through hole are both larger than the outer diameter of the screw rod (424) so that the push plate (422) moves linearly along the screw rod (424).

7. Plug valve according to claim 5, characterized in that said regulation assembly (4) further comprises:

and the return spring (43) is sleeved on the screw rod (424), one end of the return spring is abutted to the pushing plate (422), the other end of the return spring is connected to the fixed support (423), and when the ignition is not started, the return spring (43) pushes the pushing plate (422) so that the sleeve (41) is returned.

8. A plug valve according to claim 3, wherein a cam spring (4211) is provided between the cam (421) and the valve cover (2) to disengage the cam (421) from the push plate (422) when non-firing;

the outer side of the cam (421) is provided with a clamping spring (4212), and the position of the cam (421) is limited by the cam spring (4211) and the clamping spring (4212) so that the cam (421) is in contact with the pushing plate (422).

9. A plug valve according to claim 3, wherein the axis of the outlet tube (11) is perpendicular to the axis of the valve stem (3) so that the periphery of the cam (421) contacts the push plate (422).

10. A hob, characterized in that it comprises:

the stopcock of any one of claims 1-9;

a burner (5);

wherein, the outlet duct (11) of plug valve communicate with the input of combustor (5).