Plug valve and gas stove with same

Abstract

The utility model provides a plug valve and a gas stove with the plug valve, and belongs to the technical field of kitchen appliances, the plug valve comprises a valve body, a valve core, a valve rod and a valve cover, the valve body is provided with a valve body cavity and a gas inlet pipe; the valve element is arranged in the valve body cavity, and the side wall of the valve element is provided with a first firepower adjusting channel used for achieving adjustment from big fire to small fire and a second firepower adjusting channel used for achieving starting of the small fire. The valve rod is connected to the valve element, the valve deck is connected to the valve body, and the valve deck is provided with a guide structure for conducting bidirectional rotation on the valve rod. When the valve element is started in the forward direction, one of the first firepower adjusting channel and the second firepower adjusting channel communicates with the air inlet pipe. And when the valve element is reversely started, the other one of the first firepower adjusting channel and the second firepower adjusting channel is communicated with the air inlet pipe. Two-way starting can be achieved, big fire can be achieved quickly, small fire can also be started directly, a user can conveniently rotate the rotary knob once to achieve the desired load fire power, and the cooking experience feeling of the user is improved.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a stopcock valve and a gas stove having the same. Background Technology

[0002] The gas rotary valve is one of the most important components in gas appliances, typically used to control the opening and closing of the stove, gas flow, and flame adjustment. However, traditionally, precise control of the valve's settings involved reverse rotation, with the settings generally progressing from high to low, making it impossible to quickly switch from high to low. Some stoves only started with low flame, resulting in a poor user experience. Furthermore, there was a lack of effective flame control when low-temperature cooking was required. On the other hand, due to the sealing distance of the valve core orifice, more settings meant a larger angle. To achieve 5, 7, or even 9 cooking settings, the valve angle was often 240 or 300 degrees. Users could not easily switch from high to low flame in a single rotation when adjusting the valve knob, further impacting the user experience. Utility Model Content

[0003] The first technical problem to be solved by this utility model is to address the problems of the prior art by providing a stop valve that optimizes the structure of the valve core and the valve cover, enabling the stop valve to be activated in both directions. It not only has the function of adjusting from high to low heat, but also can directly start the low heat, allowing users to achieve the desired heat load with a single rotation of the knob, thus improving the user's cooking experience.

[0004] The second technical problem to be solved by this utility model is to provide a gas stove that is applied to the aforementioned plug valve.

[0005] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a plug valve, the plug valve comprising:

[0006] A valve body having a valve body cavity and an air inlet pipe communicating with the valve body cavity;

[0007] The valve core is disposed in the valve body cavity, and its side wall is provided with a first fire adjustment channel for adjusting from high fire to low fire and a second fire adjustment channel for starting low fire.

[0008] A valve stem, connected to the valve core, is used to drive the valve core to rotate clockwise or counterclockwise;

[0009] A valve cover, connected to the valve body, the valve cover having a guide structure for allowing the valve stem to rotate in both directions;

[0010] When the valve core is activated in the forward direction, one of the first firepower adjustment channel and the second firepower adjustment channel is connected to the air intake pipe; when the valve core is activated in the reverse direction, the other of the first firepower adjustment channel and the second firepower adjustment channel is connected to the air intake pipe.

[0011] According to one embodiment of the present invention, the valve body further includes a first air outlet pipe and a second air outlet pipe, the valve core further includes a valve core cavity, the first firepower adjustment channel is connected to the second firepower adjustment channel through the valve core cavity, and the air outlet end of the second firepower adjustment channel is connected to the air inlet end of the second air outlet pipe.

[0012] When the valve core is configured for forward start-up, the air intake pipe is connected to the air intake end of the first firepower adjustment channel, and the first firepower adjustment channel is connected to the second firepower adjustment channel and the second air outlet pipe in sequence through the valve core cavity. The air outlet end of the first firepower adjustment channel is connected to or disconnected from the first air outlet pipe.

[0013] When the valve core is configured to start in reverse, the first firepower adjustment channel is disconnected from the first air outlet pipe, and the air inlet pipe, the second firepower adjustment channel, and the second air outlet pipe are connected in sequence, and the air flow rate of the second firepower adjustment channel decreases as the rotation angle increases.

[0014] According to one embodiment of the present invention, the first firepower adjustment channel includes:

[0015] The first air inlet group is disposed on the side wall of the valve core and can be connected to the air inlet pipe as the valve core rotates;

[0016] The first air outlet group is disposed on the side wall of the valve core, and can be connected or disconnected from the first air outlet pipe as the valve core rotates;

[0017] The first air inlet group and the first air outlet group are connected to the first firepower adjustment channel.

[0018] According to one embodiment of the present invention, the first air inlet group includes a plurality of first air inlets arranged circumferentially along the sidewall of the valve core, and the first air outlet group includes a plurality of first air outlets arranged circumferentially along the sidewall of the valve core.

[0019] The diameters of the multiple first air inlets are different, and the diameters of the multiple first air outlets are different. The combination of the multiple first air inlets and first air outlets forms the first firepower adjustment channel that can deliver different amounts of gas.

[0020] According to one embodiment of the present invention, as the forward rotation angle of the valve core increases, the diameter of the outlet end of the plurality of first air inlets and first air outlets shows a trend of first increasing and then decreasing.

[0021] According to one embodiment of the present invention, the number of the first air inlets is greater than the number of the first air outlets, so that when some of the first air inlets are connected to the air inlet pipe, the first air outlet group is not connected to the first air outlet pipe.

[0022] According to one embodiment of the present invention, the angle between the first air inlet and its corresponding first air outlet is equal to the angle between the air inlet pipe and the first air outlet pipe.

[0023] According to one embodiment of the present invention, at least one of the plurality of first air inlets is a blind hole, and the remaining first air inlets are through holes. Each blind hole has an air passage in its wall, and each blind hole is connected to the nearest through hole through the air passage, so that the gas delivered by the air inlet pipe enters the interior of the valve core through the air passage and the through hole connected to it.

[0024] According to one embodiment of the present invention, there are multiple air passages, and the diameter of the multiple air passages decreases as the forward rotation angle increases.

[0025] According to one embodiment of the present invention, the second firepower adjustment channel includes:

[0026] The second air inlet group includes multiple second air inlets, which are arranged circumferentially along the side wall of the valve core, and the air inlet ends of the multiple second air inlets can be connected to the air inlet pipe respectively.

[0027] The second air outlet is located on the bottom wall of the valve core and connects to multiple second air inlets and the second air outlet pipe;

[0028] As the reverse rotation angle of the valve core increases, the diameter of the multiple second air inlets gradually decreases, and the multiple second air inlets and second air outlets cooperate to form a second firepower adjustment channel for supplying gas only to the second air outlet pipe.

[0029] According to one embodiment of the present invention, the valve cover includes a valve cover body, and the guide structure includes a first guide block and a second guide block connected to the top inner side of the valve cover body. The bottom of the first guide block is inclined towards its top to form a first guide surface on the side away from the second guide block, and the bottom of the second guide block is inclined towards its top to form a second guide surface on the side away from the first guide block. The first guide surface and the second guide surface can guide the forward and reverse movement of the valve stem.

[0030] According to one embodiment of the present invention, the guide structure includes a guide plate connected to the outer periphery of the valve stem. The top surface of the guide plate can abut against the first guide surface and the second guide surface, and can drive the valve stem to rotate smoothly clockwise or counterclockwise under the action of the first guide surface and the second guide surface.

[0031] According to one embodiment of the present invention, the valve cover further includes:

[0032] The first limiting block is connected to the valve cover body on the side near the end point of the first guide block, and there is a gap between the first limiting block and the top of the valve cover body, for axially limiting the valve stem when it is rotated to a certain degree.

[0033] The second limiting block is connected to the top of the valve cover body and is used to circumferentially limit the valve stem.

[0034] According to one embodiment of the present invention, the plug valve further includes a positioner assembly, the positioner assembly comprising:

[0035] A positioner is connected to the valve core on the side near the valve stem;

[0036] A mounting post is connected to the top of the valve body and has a mounting hole along its axial direction;

[0037] A return spring, one end of which is fixed to the mounting hole, and the other end extends toward the gear shifter;

[0038] The gear bead is fixed to the other end of the reset spring. The gear shifter has multiple gear slots, and the gear bead can be inserted into or removed from each gear slot to achieve switching between different gears.

[0039] According to one embodiment of the present invention, the gear shifter includes:

[0040] The first gear plate has multiple first gear teeth on its outer periphery, and two adjacent first gear teeth form a gear slot.

[0041] The second gear shift disc is connected to the bottom of the first gear shift disc, and has multiple second gear teeth on its outer circumference. The outer diameter of the first gear shift disc is larger than the outer diameter of the second gear shift disc.

[0042] According to one embodiment of the present invention, the longitudinal section of each of the first and second gear teeth gradually decreases from the inside to the outside.

[0043] According to one embodiment of the present invention, an oil reservoir is formed between a plurality of first gear teeth and second gear teeth.

[0044] According to one embodiment of the present invention, the plug valve further includes a limiting structure for limiting the position of the gear shifter. The limiting structure includes a first limiting component and a second limiting component. The first limiting component is connected to the valve core, and the second limiting component is connected to the valve body. The cooperation of the first limiting component and the second limiting component prevents the gear shifter and the valve core from dislodging from the valve body cavity.

[0045] According to one embodiment of the present invention, the first limiting component includes:

[0046] A retaining ring is provided. A retaining ring groove is provided on the outer periphery of the valve core for installing the retaining ring. The retaining ring is inserted into the retaining ring groove and abuts against the top surface of the gear shifter to prevent the gear shifter from moving along the axial direction of the valve core.

[0047] According to one embodiment of the present invention, the second limiting component includes:

[0048] Multiple mounting blocks are connected to the side of the valve body near the valve cover, and each mounting block has a U-shaped groove on its inner side;

[0049] A limiting ring is inserted into each of the U-shaped grooves, and the multiple U-shaped grooves together limit the limiting ring;

[0050] The axial projection of the limiting ring and the axial projection of the gear shifter overlap to prevent the gear shifter from dislodging from the valve body cavity.

[0051] The technical solution adopted by this utility model to solve the second technical problem mentioned above is: a gas stove, the gas stove including the stop valve as described in any of the above items.

[0052] Compared with the prior art, the present invention has the following advantages or beneficial effects:

[0053] The plug valve of this invention optimizes the structure of the valve core and the valve cover, enabling the plug valve to be activated in both directions. It not only allows for adjustment from high to low heat, but also allows for direct activation of low heat, eliminating the need to first switch to high heat and then adjust to low heat. This allows users to achieve the desired heat output with a single knob rotation, improving the user's cooking experience.

[0054] The valve core utilizes an up-and-down staggered air intake structure, which prevents the air intake from increasing or decreasing suddenly due to changes in the orifice diameter during rotation. This increases the air intake path, slows down changes in flow rate, and achieves a stable air intake speed, thus ensuring stable combustion on the stove.

[0055] The gear shifter utilizes a double-layer wave-shaped structure, which not only enhances the feel of each gear and reduces the friction area between the gear shifter and the valve body, but also prevents further leakage of lubricating oil, thereby reducing torque and improving the user's gear shifting experience.

[0056] By setting dual limiting devices at the valve core and the valve body, the valve positioner and its position bead can be effectively limited, and the valve core can be prevented from running out during transportation or falling in the opposite direction, which could lead to the failure of the entire valve. Attached Figure Description

[0057] The above and other features and advantages of this invention will become more apparent from a detailed description of exemplary embodiments with reference to the accompanying drawings.

[0058] Figure 1 This is a schematic diagram of a plug valve according to an exemplary embodiment.

[0059] Figure 2 This is an exploded view of a plug valve according to an exemplary embodiment.

[0060] Figure 3 This is a cross-sectional view of a plug valve according to an exemplary embodiment.

[0061] Figure 4 This is a schematic diagram of a valve core according to an exemplary embodiment.

[0062] Figure 5 This is a right view of the valve core shown according to an exemplary embodiment.

[0063] Figure 6 This is a front view of the valve core shown according to an exemplary embodiment.

[0064] Figure 7 yes Figure 6 Sectional view along the AA direction.

[0065] Figure 8 yes Figure 6Sectional view in the BB direction.

[0066] Figure 9 This is a schematic diagram showing the relative positions of the valve core and the gear position according to an exemplary embodiment.

[0067] Figure 10 This is a schematic diagram illustrating the connection between the valve cover and the valve stem according to an exemplary embodiment.

[0068] Figure 11 This is a perspective view of a valve cover according to an exemplary embodiment.

[0069] Figure 12 This is a schematic diagram of a gear shifter according to an exemplary embodiment.

[0070] Figure 13 This is a cross-sectional view of a gear shifter according to an exemplary embodiment.

[0071] Figure 14 This is a perspective view of a gear shifter according to an exemplary embodiment.

[0072] Figure 15 This is a schematic diagram showing the connection of the valve body, valve core, and limiting structure according to an exemplary embodiment.

[0073] Figure 16 This is a schematic diagram of a valve body according to an exemplary embodiment.

[0074] Figure 17 This is a schematic diagram of the connection of the limiting ring according to an exemplary embodiment.

[0075] 1. Valve body; 10. Valve body cavity; 11. Inlet pipe; 12. First outlet pipe; 13. Second outlet pipe;

[0076] 2. Valve core; 20. Valve core cavity; 21. First air inlet group; 211. First air inlet; 212. Air outlet; 22. Second air inlet group; 221. Second air inlet; 23. First air outlet group; 231. First air outlet; 24. Second air outlet; 25. Snap ring groove;

[0077] 3. Valve stem;

[0078] 4. Valve cover; 40. Valve cover body; 41. Guide structure; 411. First guide block; 4111. First guide surface; 412. Second guide block; 4121. Second guide surface; 413. Guide plate; 42. First limiting block; 420. Gap; 43. Second limiting block;

[0079] 5. Gearbox assembly; 51. Gearbox; 511. First gearbox; 5111. First gear tooth; 5112. Gearbox groove; 512. Second gearbox; 5121. Second gear tooth; 513. Oil reservoir; 52. Mounting post; 521. Mounting hole;

[0080] 6. Limiting structure; 61. First limiting component; 611. Snap ring; 62. Second limiting component; 621. Mounting block; 6211. U-shaped groove; 622. Limiting ring; 6221. Notch;

[0081] 7. Paddle; 8. Microswitch; 9. Pressure plate. Detailed Implementation

[0082] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0083] The terms “a,” “one,” “the,” and “” are used to indicate the existence of one or more elements / components / etc.; the terms “include” and “have” are used to indicate an open-ended meaning of inclusion and that there may be other elements / components / etc. in addition to the listed elements / components / etc.

[0084] This utility model embodiment provides a plug valve, such as Figure 1-16As shown, the plug valve includes a valve body 1, a valve core 2, a valve stem 3, and a valve cover 4. The valve body 1 has a valve body cavity 10 and an air inlet pipe 11 communicating with the valve body cavity 10. The valve core 2 is disposed in the valve body cavity 10. The side wall of the valve core 2 is provided with a first fire adjustment channel for adjusting from high to low fire and a second fire adjustment channel for starting low fire. The valve stem 3 is connected to the valve core 2 and is used to drive the valve core 2 to rotate clockwise or counterclockwise. The valve cover 4 is connected to the valve body 1 and is provided with a guide structure 41 for allowing the valve stem 3 to rotate in both directions. When the valve core 2 is started in the forward direction, one of the first fire adjustment channel and the second fire adjustment channel is connected to the air inlet pipe 11. When the valve core 2 is started in the reverse direction, the other of the first fire adjustment channel and the second fire adjustment channel is connected to the air inlet pipe 11. In this embodiment, the first heat adjustment channel allows for adjustments from high to low heat, meaning it can handle various heat levels from low to high. The second heat adjustment channel is for low-heat start-up, meaning it's always for low heat. This allows users to easily select the desired heat level during cooking. For example, to start low heat, simply drive the valve stem 3 to rotate the valve core 2 clockwise, eliminating the need to switch to high heat first and then low heat. Similarly, to start medium or high heat, simply drive the valve stem 3 to rotate the valve core 2 counter-clockwise. Furthermore, to adapt to this application, the valve cover 4 structure has been optimized. Through the guide structure 41, the valve stem 3 can rotate both clockwise and counter-clockwise in the OFF position, enabling bidirectional start-up. This allows users to achieve the desired heat level with a single knob rotation, improving the cooking experience.

[0085] It should be noted that in this embodiment, forward start refers to the valve core 2 being in the position shown in the diagram. Figure 9 The indicated OFF position, along with the counter-clockwise rotation of valve stem 3, initiates ignition, allowing selection of the desired cooking setting after ignition; reverse start refers to valve core 2 rotating from the OFF position... Figure 9 The OFF position is indicated by rotating the valve stem 3 clockwise to ignite the valve. After ignition, cooking can be performed at one of the reverse positions 1-3. It should be noted that in this embodiment, the air holes of the valve core 2 and the position slots 5112 on the positioner 51 correspond one-to-one. The position slots 5112 have one more position than the air holes, corresponding to the OFF position. For ease of description, this application refers to the position corresponding to the OFF position as the 0-degree position of the valve core 2. Figure 9 The 5 forward gears and 3 reverse gears shown are for ease of description and explanation only. The specific number of forward and reverse gears can be set according to different usage needs, and this application does not impose any specific restrictions.

[0086] In a preferred embodiment of this utility model, such as Figure 2-9The valve body 1 shown includes a valve body 1 and a first air outlet pipe 12 and a second air outlet pipe 13. The valve core 2 includes a valve core cavity 20. A first firepower adjustment channel is connected to the second firepower adjustment channel through the valve core cavity 20. The air outlet end of the second firepower adjustment channel is connected to the air inlet end of the second air outlet pipe 13. When the valve core 2 is configured to start in the forward direction, the air inlet pipe 11 is connected to the air inlet end of the first firepower adjustment channel. The first firepower adjustment channel is connected to the second firepower adjustment channel and the second air outlet pipe 13 in sequence through the valve core cavity 20. The air outlet end of the first firepower adjustment channel is connected to or disconnected from the first air outlet pipe 12. When the valve core 2 is configured to start in the reverse direction, the first firepower adjustment channel is disconnected from the first air outlet pipe 12. The air inlet pipe 11, the second firepower adjustment channel and the second air outlet pipe 13 are connected in sequence. The air flow rate of the second firepower adjustment channel decreases as the rotation angle increases. In other words, in this embodiment, the first power adjustment channel is connected to the valve core cavity 20 and the second power adjustment channel, so that both the first power adjustment channel and the second power adjustment channel can be connected to the second exhaust pipe 13. However, the first exhaust pipe 12 is only connected to the first power adjustment channel, and according to usage needs, in some gears such as low power, the first power adjustment channel and the first exhaust pipe 12 are not connected, and the first power adjustment channel can only deliver gas through the second exhaust pipe 13.

[0087] If the forward start is at a specific heat adjustment point, such as a commonly used non-high heat cooking mode, the gas flow rate of the first heat adjustment channel can, of course, be adjusted according to actual needs with the valve core 2. This assumption is only for convenience of description and is not intended to limit this application. The specific process is as follows: When the valve core 2 is activated forward, the gas in the intake pipe 11 enters the first heat adjustment channel. The gas in the first heat adjustment channel simultaneously enters the first exhaust pipe 12 and the second exhaust pipe 13 before entering the inner and outer annular cavities of the burner head for combustion. The first exhaust pipe 12 and the second exhaust pipe 13 increase in size as the gas flow rate of the first heat adjustment channel increases, and decrease in size as the gas flow rate of the first heat adjustment channel decreases. When the gas flow rate of the first heat adjustment channel reaches the preset low heat state, the first heat adjustment channel only connects to the second exhaust pipe 13, satisfying the need to switch from high heat cooking to low heat. When valve core 2 is activated in reverse, the second heat adjustment channel directly corresponds to the low flame. The second heat adjustment channel is only connected to the second gas outlet pipe 13, and as the clockwise rotation angle of valve core 2 increases, the gas flow rate of the second heat adjustment channel gradually decreases. In this way, users can directly start the stove to ignite by reversing the operation, and the stove will start directly to the low flame, eliminating the need to switch to high flame and then adjust to low flame, thus improving the user's cooking experience.

[0088] In a preferred embodiment of this utility model, such as Figure 2-9The first heat adjustment channel shown includes a first air inlet group 21 and a first air outlet group 23. The first air inlet group 21 is located on the side wall of the valve core 2 and can be connected to the air inlet pipe 11 as the valve core 2 rotates. The first air outlet group 23 is located on the side wall of the valve core 2 and can be connected to or disconnected from the first air outlet pipe 12 as the valve core 2 rotates. The first air inlet group 21 and the first air outlet group 23 are connected to the first heat adjustment channel. In this embodiment, the first air inlet group 21 and the first air outlet group 23 are connected to form various heat settings from low to medium. When the air intake of the first air inlet group 21 is small and belongs to low heat, all the gas can be delivered to the second air outlet pipe 13 and enter the inner ring of the burner head. That is, even during the forward start-up process, the first heat adjustment channel can achieve low heat cooking through the first air inlet group 21. In other words, the cooking needs of high heat first and then low heat can be met within the minimum rotation angle range, improving the user experience.

[0089] In a preferred embodiment of this utility model, such as Figure 2-9 The first air inlet group 21 shown includes a plurality of first air inlets 211 arranged circumferentially along the side wall of the valve core 2, and the first air outlet group 23 includes a plurality of first air outlets 231 arranged circumferentially along the side wall of the valve core 2. The apertures of the plurality of first air inlets 211 are all different, and the apertures of the plurality of first air outlets 231 are also different. The combination of the plurality of first air inlets 211 and first air outlets 231 forms a first firepower adjustment channel capable of delivering different amounts of gas. Figure 2-9 As shown, the aperture variation patterns of the multiple first air outlets 231 are the same as those of the multiple first air inlets 211. For example, when the first air inlet 211 is rotated to the high-fire position, the aperture of the first air outlet 231 is also at its maximum, ensuring maximum firepower. Precise control of firepower is achieved through the cooperation of both.

[0090] In a preferred embodiment of this utility model, such as Figure 2-9 As shown, with the increase of the forward rotation angle of the valve core 2, the diameters of the outlet ends of the multiple first air inlets 211 and first air outlets 231 all show a trend of first increasing and then decreasing. In this embodiment, the forward rotation angle refers to the angle by which the valve core 2 rotates from the 0-degree position to the corresponding forward position. In this embodiment, the diameter of the first air inlet 211 first increases and then decreases, and the power output of the stopcock valve also first increases and then decreases. Figure 2-9This diagram illustrates the precise control of five heat levels. Levels 1-4 all use the first exhaust pipe 12 and the second exhaust pipe 13 (inner and outer rings), while level 5 uses only the second exhaust pipe 13 (inner ring). Level 1 is a specific heat adjustment point, not the maximum heat, typically set to a common, non-high-heat cooking mode. This design can be matched to medium-temperature cooking modes by adjusting the orifice size. Level 2 is the maximum load position, commonly used in stir-fry mode. Level 3, compared to level 2, features a double-ring heat reduction for heat control. Level 4, compared to level 3, further reduces the double-ring heat for heat control. Level 5 uses only the inner ring for minimum heat load. This design addresses the issue of excessive rotation when switching from high heat to low heat, improving the user's cooking experience. Of course, the number of heat levels can be 3, 4, 5, 6, 7, 8, 9, 10, or even more, depending on user needs; this application does not impose any restrictions.

[0091] Preferably, the multiple first air inlets 211 are staggered vertically on the valve core 2, that is, the central axis of two adjacent first air inlets 211 is set vertically. In this way, when the gear is changed and the air inlet diameter becomes smaller or larger, the air intake path is increased, the change in flow rate is slowed down, and a stable air intake flow rate is achieved, so as to achieve stable combustion on the stove.

[0092] In a preferred embodiment of this utility model, such as Figure 2-9 The number of first air inlets 211 shown is greater than the number of first air outlets 231, so that when some of the first air inlets 211 are connected to the air inlet pipe 11, the first air outlet group 23 is not connected to the first air outlet pipe 12. Since the firepower of the first firepower adjustment channel first increases and then decreases, when its firepower is low, only the inner ring corresponding to the second air outlet pipe 13 needs to be ignited. Therefore, the first air outlet pipe 12 needs to be disconnected at this time. Thus, the number of first air outlets 231 is less than the number of first air inlets 211, and the first firepower adjustment channel is connected to the second firepower adjustment channel through the valve core cavity 20, which satisfies the above requirements. The structure is ingenious and reasonable, facilitating gear shifting.

[0093] In a preferred embodiment of this utility model, such as Figure 2-9 The angle between the first air inlet 211 and its corresponding first air outlet 231 is equal to the angle between the air inlet pipe 11 and the first air outlet pipe 12. In this embodiment, the first air inlet 211 and its corresponding first air outlet 231 refer to the situation where, when the first air inlet 211 is connected to the air inlet pipe 11, gas can be output from the corresponding first air outlet 231 and enter the first air outlet pipe 12. For example... Figure 8-9The first air inlet 211, located 20 degrees from the valve core, corresponds to the first air inlet 211 in the forward 1st gear position. The corresponding first air outlet 231 is located closest to the valve core at a 20-degree angle. The angle between the first air inlet 211 and its corresponding first air outlet 231 is equal to the angle between the air inlet pipe 11 and the first air outlet pipe 12. In this embodiment, the angle between the first air inlet 211 and its corresponding first air outlet 231 is designed to be 90°. The valve core 2 is processed and formed accordingly. By matching the angle and diameter of the first air inlet 211 and its corresponding first air outlet 231, precise control of the firepower is ensured.

[0094] In a preferred embodiment of this utility model, such as Figure 2-9 At least one of the multiple first air inlets 211 shown is a blind hole, and the remaining first air inlets 211 are through holes. Each blind hole has an air passage 212 formed in its wall. Each blind hole is connected to the nearest through hole through the air passage 212, so that the gas delivered by the air inlet pipe 11 enters the interior of the valve core 2 through the air passage 212 and the connected through hole. Figure 8-9 In the middle, at the second gear, high fire position, as the valve core 2 continues to rotate, the diameter of the first air intake port 211 continues to decrease. Since there will be momentary changes in firepower between gear positions, part of the first air intake port 211 can be designed as a blind port, and the air passage port 212 can be used to ensure a gradual reduction in air intake during gear switching, ensuring a smooth transition and preventing momentary changes in firepower due to gear intervals. For example, attached... Figure 2-9 This illustration depicts a scenario where forward gears 1, 2, and 3 are through holes with their diameters increasing and then decreasing, while forward gears 4 and 5 are blind holes. An air vent 212 is provided between forward gears 4 and 5 for gear switching. The design of the air vent 212 for forward gears 4 and 3 means that when switching from forward gear 3 to forward gear 4, the heat needs to gradually decrease. Without the air vent 212, the interval between forward gears 4 and 3 would not allow air to enter, resulting in a sudden change in heat output, negatively impacting the user experience. The air vent 212 allows for smooth transitions in heat output between gear levels.

[0095] In a preferred embodiment of this utility model, such as Figure 2-9 The vent holes 212 shown are multiple, and their diameters decrease as the rotation angle increases. For some applications requiring precise gear shifting within a very small range, when the diameter of the first air inlet 211 decreases, multiple blind holes and vent holes 212 need to be designed, such as in the attached... Figure 2-9The illustration shows a scenario where forward gear 1, forward gear 2, and forward gear 3 are all through holes with corresponding hole diameters that first increase and then decrease, while forward gear 4 and forward gear 5 are blind holes. As the firepower gradually decreases, the diameter of the air passage 212 also gradually decreases, thus achieving the switching from forward gear 4 to forward gear 5 with reduced firepower.

[0096] Preferably, the central axes of two adjacent air vents 212 are collinear, and the air outlet of each air vent and the air inlet of its adjacent air vent partially overlap, meaning that there is a certain misalignment between two adjacent air vents to prevent sudden increases or decreases in airflow. This misalignment serves to buffer changes in airflow.

[0097] In a preferred embodiment of this utility model, such as Figure 2-9 The second firepower adjustment channel shown includes a second air inlet group 22 and a second air outlet 24. The second air inlet group 22 includes multiple second air inlets 221, which are arranged circumferentially along the side wall of the valve core 2. The air inlet ends of the multiple second air inlets 221 can be connected to the air inlet pipe 11 respectively. The second air outlet 24 is disposed on the bottom wall of the valve core 2 and connects the multiple second air inlets 221 and the second air outlet pipe 13. As the reverse rotation angle of the valve core 2 increases, the diameter of the multiple second air inlets 221 gradually decreases. The multiple second air inlets 221 and the second air outlet 24 cooperate to form a second firepower adjustment channel for supplying gas only to the second air outlet pipe 13. In this application, the multiple second air inlets 221 all correspond to the low flame, and the firepower decreases as the reverse rotation angle increases. In other words, reverse start only sets the heat to the low setting. Users can directly start the low heat by simply reversing the start, eliminating the need to first switch to high heat and then back to low heat, thus improving the user's cooking experience. (Attached) Figure 9 This illustration shows the reverse 3rd gear configuration. Of course, there can be other gears such as 2, 4, 5, 6, 7, 8, or even more. Adjustments can be made according to design requirements, and this application does not impose any restrictions.

[0098] Preferably, the multiple second air inlets 221 are staggered vertically on the valve core 2, that is, the central axis of two adjacent second air inlets 221 is set vertically. In this way, when the gear is changed and the air inlet diameter becomes smaller or larger, the air intake path is increased, the change in flow rate is slowed down, and a stable air intake flow rate is achieved, so as to achieve stable combustion on the stove.

[0099] In a preferred embodiment of this utility model, such as Figure 10-11The valve cover 4 shown includes a valve cover body 40. The guide structure 41 includes a first guide block 411 and a second guide block 412 connected to the inner top of the valve cover body 40. The bottom of the first guide block 411, away from the second guide block 412, slopes towards its top to form a first guide surface 4111. The bottom of the second guide block 412, away from the first guide block 411, slopes towards its top to form a second guide surface 4121. The first guide surface 4111 and the second guide surface 4121 can guide the forward and reverse movement of the valve stem 3. This application limits the 0-degree position of the valve stem 3 by setting the first guide block 411 and the second guide block 412 on the valve cover 4. The first guide surface 4111 and the second guide surface 4121 can guide the forward and reverse starting processes. That is, during ignition, the user can choose to start in the forward direction (counterclockwise rotation of the valve stem 3) or in the reverse direction (clockwise rotation of the valve stem 3) as needed, satisfying the bidirectional starting of the valve stem 3, allowing the user to achieve the desired load and firepower with a single knob rotation. for example Figure 9 The valve has five forward gears and three reverse gears. Users only need to rotate the valve stem 3 to the corresponding gear, making operation simple and convenient and improving the user experience.

[0100] In a preferred embodiment of this utility model, such as Figure 10-11 The guide structure 41 shown includes a guide plate 413 connected to the outer periphery of the valve stem 3. The top surface of the guide plate 413 can abut against the first guide surface 4111 and the second guide surface 4121, and can drive the valve stem 3 to rotate smoothly clockwise or counterclockwise under the action of the first guide surface 4111 and the second guide surface 4121. In this embodiment, the guide plate 413 includes an annular segment sleeved on the outer periphery of the valve stem 3 and a straight segment for contacting the first guide surface 4111 and the second guide surface 4121. When the stove is ignited, the valve stem 3 is pressed down and rotated to achieve ignition. The guide plate 413 moves downward and rotates with the valve stem 3. The first guide surface 4111 or the second guide surface 4121 moves away from the 0-degree limit after the knob is pressed down, giving the guide plate 413 and the valve stem 3 a smooth transition.

[0101] In a preferred embodiment of this utility model, such as Figure 10-11The valve cover 4 shown also includes a first limiting block 42 and a second limiting block 43. The first limiting block 42 is connected to the side of the valve cover body 40 near the end point of the first guide block 411, and there is a gap 420 between the first limiting block 42 and the top of the valve cover body 40 for axial limiting of the valve stem 3 when rotated to 90 degrees. The second limiting block 43 is connected to the top of the valve cover body 40 for circumferential limiting of the valve stem 3. The first limiting block 42 can limit the valve stem 3 to 90 degrees, and the second limiting block 43 can limit the valve stem 3 to 180 degrees. The gap 420 designed on the valve cover 4 has a depth of ±1mm within the downward stroke range. Typically, with a downward stroke of 3.5mm, the depth of the gap 420 is between 2.5mm and 4.5mm. The function of the gap 420 is to ensure that when the plug valve is rotated to the 90-degree limit, it can continue to be rotated downwards without being blocked by the limit in the valve cover 4, allowing it to continue to be pressed down and start stir-frying, thus ensuring the user's stir-frying experience. The second limit block 43 and the first guide surface 4111 form the rotation range for the valve stem 3 to rotate in the forward direction, and the second limit block 43 and the second guide surface 4121 form the rotation range for the valve stem 3 to rotate in the reverse direction. The limiting step in the prior art is eliminated, reducing the sway of the pressure plate 9 and avoiding the fluctuation problem of the pressure plate 9 when rotating from the high heat position to the low heat position or vice versa.

[0102] In a preferred embodiment of this utility model, such as Figure 2 , 3 The plug valve shown in Figures 12-14 also includes a positioner assembly 5, which includes a positioner 51, a mounting post 52, a return spring, and a positioner bead. The positioner 51 is connected to the valve core 2 on the side near the valve stem 3; the mounting post 52 is connected to the top of the valve body 1 and has an axial mounting hole 521; one end of the return spring is fixed to the mounting hole 521, and the other end extends towards the positioner 51; the positioner bead 54 is fixed to the other end of the return spring 53. The positioner 51 has multiple position slots 5112, and the positioner bead 54 can be inserted into or disengaged from each position slot 5112 to achieve switching between different positions. The cooperation of the positioner 51, the positioner bead, and the return spring provides tactile feedback at each power level, allowing users to easily understand the power level and conveniently adjust the power.

[0103] In a preferred embodiment of this utility model, such as Figure 2 , 3 The gear shifter 51 shown in Figures 12-14 includes a first gear shift plate 511 and a second gear shift plate 512. The outer periphery of the first gear shift plate 511 has multiple first gear teeth 5111, with adjacent first gear teeth 5111 forming a gear shift groove 5112. The second gear shift plate 512 is connected to the bottom of the first gear shift plate 511, and its outer periphery has multiple second gear teeth 5121. The outer diameter of the first gear shift plate 511 is larger than the outer diameter of the second gear shift plate 512. Figure 12-14 It is easy to see that the first gear plate 511 and the second gear plate 512 are stepped. This design can reduce the friction area between the outer periphery of the gear shifter 51 and the gear ball, and reduce the rotational torque of the valve core 2.

[0104] In a preferred embodiment of this utility model, such as Figure 12-14 The longitudinal section of each first gear tooth 5111 and second gear tooth 5121 shown gradually decreases from the inside to the outside. That is, the top and bottom surfaces of the first gear tooth 5111 are both sloped, effectively reducing the friction area between the first gear tooth 5111 and the valve body 1, and reducing the rotational torque of the valve core 2. The bottom surface of the second gear tooth 5121 is also sloped, reducing the friction between the positioner 51 and the valve core 2, thereby reducing the rotational torque of the valve body 1.

[0105] In a preferred embodiment of this utility model, such as Figure 12-14 An oil reservoir 513 is formed between the multiple first gear teeth 5111 and second gear teeth 5121 shown. Generally, the valve core 2 is ground and lubricated. Excessive lubricating oil overflow will increase the torque of the valve core 2 and the valve body 1. The oil reservoir 513 can provide an additional storage space for the valve body 1, prevent lubricating oil overflow, and ensure a smaller rotational torque.

[0106] In a preferred embodiment of this utility model, such as Figure 15-17 The shown plug valve also includes a limiting structure 6 for limiting the positioner 51. The limiting structure 6 includes a first limiting component 61 and a second limiting component 62. The first limiting component 61 is connected to the valve core 2, and the second limiting component 62 is connected to the valve body 1. Through the cooperation of the first limiting component 61 and the second limiting component 62, the positioner 51 and the valve core 2 are prevented from dislodging from the valve body cavity 10. In this example, by setting a double limiting structure at the valve core 2 and the valve body 1, the positioner 51 and the position bead are restricted from running out, and the valve core 2 is also restricted during transportation. If the valve body 1 falls in the opposite direction, the valve core 2 will run out, causing the entire valve to fail and affecting user operation.

[0107] In a preferred embodiment of this utility model, such as Figure 15 The first limiting assembly 61 shown includes a retaining ring 611. A retaining ring groove 25 is provided on the outer periphery of the valve core 2 for mounting the retaining ring 611. The retaining ring 611 is inserted into the retaining ring groove 25 and abuts against the top surface of the gear shifter 51, preventing the gear shifter 51 from moving axially along the valve core 2. The retaining ring 611, also called a retaining ring or snap ring, prevents axial movement of the gear shifter 51 by fitting it into the retaining ring groove 25 on the outer periphery of the valve core 2, thus preventing problems such as the gear shifter 51, the gear shift ball slipping out, and gear failure.

[0108] In a preferred embodiment of this utility model, such as Figure 16 , 17The second limiting assembly 62 shown includes multiple mounting blocks 621 and a limiting ring 622. The mounting blocks 621 are connected to the side of the valve body 1 near the valve cover 4. Each mounting block 621 has a U-shaped groove 6211 on its inner side. The limiting ring 622 is inserted into each U-shaped groove 6211, and the multiple U-shaped grooves 6211 together limit the limiting ring 622. The axial projection of the limiting ring 622 overlaps with the axial projection of the shifter 51 to prevent the shifter 51 from dislodging from the valve body cavity 10. The limiting ring 622 is located above the shifter 51, and the overlap of their axial projections prevents the valve core 2 from slipping out during transportation or reverse drops, thus preventing the entire plug valve from failing.

[0109] Preferably, the limiting ring 622 has a notch 6221 to facilitate its insertion into multiple U-shaped grooves 6211.

[0110] This utility model embodiment provides a gas stove, the gas stove including as follows: Figure 1-17 The above-described stopcock valve is shown. Because the gas stove includes any of the above-described stopcock valves, the gas stove in this embodiment also has the above-described technical effects. That is to say, when the user starts the stove, they can rotate the knob in the forward direction (i.e., the existing counterclockwise rotation) to adjust the flame to the desired flame, such as high or medium, or they can directly start it in the reverse direction (i.e., rotate the knob clockwise), which allows the user to start the stove directly on low flame, eliminating the process of first turning to high flame and then adjusting to low flame, thus improving the user's cooking experience. In addition, the first air inlet hole group 21 and the second air inlet hole group 22 on the valve core 2 utilize an upper and lower staggered air inlet structure, so that the air intake will not suddenly increase or decrease due to changes in the hole diameter during the rotation of the valve core 2. This increases the air intake path, slows down the change in flow rate, and achieves a stable air intake speed, resulting in stable combustion on the stove. The gear shifter 51 not only improves the feel of each gear, reduces the friction area between the gear shifter 51 and the valve body 1, and prevents further leakage of lubricating oil, thus preventing increased rotational resistance and torque caused by excessive lubricating oil leakage, but also enhances the user's gear shifting experience. By setting dual limiting devices at the valve core 2 and valve body 1, the gear shifter 51 and its gear shift beads can be effectively limited, and the problem of the valve core 2 running out during transportation or reverse drop, leading to overall valve failure, can also be prevented.

[0111] In addition, a microswitch 8 is provided at the 190-degree high-fire position of the valve body to detect whether the cooking firepower is in the stir-fry position. When the paddle 7 installed on the top of the valve core 2 rotates to the stir-fry position along with the valve core 2, the protrusion on the paddle 7 presses against the sensing part of the microswitch 8, causing the microswitch 8 to close and transmit a signal to the controller. The controller then controls the range hood to start the stir-fry air volume. When in other non-stir-fry positions, the paddle 7 does not contact the microswitch 8, and the microswitch 8 is in the open state. The controller controls the range hood to reduce the air volume according to the gear where the valve core 2 is located. This solution is simple and intelligent, without the need to set up additional electronic control. The controller only needs to realize the linkage control of the air volume size according to the on-off circuit current of the microswitch, and achieve the linkage control of the large and small air volumes.

[0112] In the embodiments of the present invention, the term "multiple" refers to two or more, unless otherwise clearly defined. Terms such as "installed", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0113] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present invention.

[0114] In the description of this specification, the description of terms such as "one embodiment", "one preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0115] The above are only the preferred embodiments of the embodiments of the present invention, and are not used to limit the embodiments of the present invention. For those skilled in the art, the embodiments of the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the embodiments of the present invention shall be included in the protection scope of the embodiments of the present invention.

Claims

1. A plug valve, characterized in that, include: The valve body (1) has a valve body cavity (10) and an air inlet pipe (11) communicating with the valve body cavity (10). The valve core (2) is located in the valve body cavity (10), and its side wall is provided with a first fire adjustment channel for adjusting from high fire to low fire and a second fire adjustment channel for starting low fire. The valve stem (3) is connected to the valve core (2) and is used to drive the valve core (2) to rotate clockwise or counterclockwise. A valve cover (4) is connected to the valve body (1), and the valve cover (4) is provided with a guide structure (41) for allowing the valve stem (3) to rotate in both directions. When the valve core (2) is started in the forward direction, one of the first firepower adjustment channel and the second firepower adjustment channel is connected to the air intake pipe (11); when the valve core (2) is started in the reverse direction, the other of the first firepower adjustment channel and the second firepower adjustment channel is connected to the air intake pipe (11).

2. The plug valve according to claim 1, characterized in that, The valve body (1) further includes a first air outlet pipe (12) and a second air outlet pipe (13), and the valve core (2) further includes a valve core cavity (20). The first firepower adjustment channel is connected to the second firepower adjustment channel through the valve core cavity (20), and the air outlet end of the second firepower adjustment channel is connected to the air inlet end of the second air outlet pipe (13). When the valve core (2) is configured to start in the forward direction, the air inlet pipe (11) is connected to the air inlet end of the first firepower adjustment channel, and the first firepower adjustment channel is connected to the second firepower adjustment channel and the second air outlet pipe (13) in sequence through the valve core cavity (20). The air outlet end of the first firepower adjustment channel is connected to or disconnected from the first air outlet pipe (12). When the valve core (2) is configured to start in reverse, the first firepower adjustment channel is disconnected from the first air outlet pipe (12), the air inlet pipe (11), the second firepower adjustment channel and the second air outlet pipe (13) are connected in sequence, and the air flow rate of the second firepower adjustment channel decreases as the rotation angle increases.

3. The plug valve according to claim 2, characterized in that, The first firepower adjustment channel includes: The first air inlet group (21) is disposed on the side wall of the valve core (2) and can be connected to the air inlet pipe (11) as the valve core (2) rotates. The first air outlet group (23) is disposed on the side wall of the valve core (2), and can be connected or disconnected from the first air outlet pipe (12) as the valve core (2) rotates; The first air inlet group (21) and the first air outlet group (23) are connected to the first firepower adjustment channel.

4. The plug valve according to claim 3, characterized in that, The first air inlet group (21) includes a plurality of first air inlets (211) arranged circumferentially along the side wall of the valve core (2), and the first air outlet group (23) includes a plurality of first air outlets (231) arranged circumferentially along the side wall of the valve core (2). The diameters of the multiple first air inlets (211) are different, and the diameters of the multiple first air outlets (231) are different. The combination of the multiple first air inlets (211) and first air outlets (231) forms the first firepower adjustment channel that can deliver different amounts of gas.

5. The plug valve according to claim 4, characterized in that, As the forward rotation angle of the valve core (2) increases, the diameter of the outlet end of the plurality of first air inlets (211) and first air outlets (231) all show a trend of first increasing and then decreasing.

6. The plug valve according to claim 4, characterized in that, The number of the first air inlets (211) is greater than the number of the first air outlets (231) so that when a portion of the first air inlets (211) are connected to the air inlet pipe (11), the first air outlet group (23) is not connected to the first air outlet pipe (12).

7. The plug valve according to claim 4, characterized in that, The angle between the first air inlet (211) and its corresponding first air outlet (231) is equal to the angle between the air inlet pipe (11) and the first air outlet pipe (12).

8. The plug valve according to claim 4, characterized in that, At least one of the multiple first air inlets (211) is a blind hole, and the remaining first air inlets (211) are through holes. Each blind hole has an air passage (212) on its wall. Each blind hole is connected to the nearest through hole through the air passage (212) so that the gas delivered by the air inlet pipe (11) enters the interior of the valve core (2) through the air passage (212) and the through hole connected to it.

9. The plug valve according to claim 8, characterized in that, There are multiple air passages (212), and the diameter of the multiple air passages (212) decreases as the forward rotation angle increases.

10. The plug valve according to claim 2, characterized in that, The second firepower adjustment channel includes: The second air inlet group (22) includes a plurality of second air inlets (221), which are arranged circumferentially along the side wall of the valve core (2), and the air inlet ends of the plurality of second air inlets (221) can be connected to the air inlet pipe (11) respectively. The second air outlet (24) is located on the bottom wall of the valve core (2) and connects to multiple second air inlets (221) and the second air outlet pipe (13). As the reverse rotation angle of the valve core (2) increases, the diameter of the multiple second air inlets (221) gradually decreases, and the multiple second air inlets (221) and the second air outlet (24) cooperate to form a second firepower adjustment channel for supplying gas only to the second air outlet pipe (13).

11. The plug valve according to claim 1, characterized in that, The valve cover (4) includes a valve cover body (40), and the guide structure (41) includes a first guide block (411) and a second guide block (412) connected to the top inner side of the valve cover body (40). The bottom of the first guide block (411) is inclined towards its top to form a first guide surface (4111) on the side away from the second guide block (412), and the bottom of the second guide block (412) is inclined towards its top to form a second guide surface (4121). The first guide surface (4111) and the second guide surface (4121) can guide the forward and reverse movement of the valve stem (3).

12. The plug valve according to claim 11, characterized in that, The guide structure (41) includes a guide plate (413) connected to the outer periphery of the valve stem (3). The top surface of the guide plate (413) can abut against the first guide surface (4111) and the second guide surface (4121), and can drive the valve stem (3) to rotate smoothly clockwise or counterclockwise under the action of the first guide surface (4111) and the second guide surface (4121).

13. The plug valve according to claim 11, characterized in that, The valve cover (4) also includes: The first limiting block (42) is connected to the side of the valve cover body (40) near the end of the first guide block (411), and there is a gap (420) between the first limiting block (42) and the top of the valve cover body (40) for axially limiting the valve stem (3) when it is rotated to 90 degrees. The second limiting block (43) is connected to the top of the valve cover body (40) and is used to circumferentially limit the valve stem (3).

14. The plug valve according to claim 1, characterized in that, It also includes a gear shift assembly (5), which includes: A gear shifter (51) is connected to the valve core (2) on the side near the valve stem (3); Mounting post (52) is connected to the top of the valve body (1) and has mounting holes (521) along its axial direction. A return spring, one end of which is fixed to the mounting hole (521), and the other end extends toward the stop (51); The gear bead is fixed to the other end of the reset spring. The gear positioner (51) has multiple gear slots (5112). The gear bead can be inserted into or removed from each gear slot (5112) to achieve switching between different gears.

15. The plug valve according to claim 14, characterized in that, The gear shifter (51) includes: The first gear plate (511) has multiple first gear teeth (5111) on its outer periphery, and two adjacent first gear teeth (5111) form a gear groove (5112). The second gear plate (512) is connected to the bottom of the first gear plate (511), and its outer circumference is provided with a plurality of second gear teeth (5121). The outer diameter of the first gear plate (511) is larger than the outer diameter of the second gear plate (512).

16. The plug valve according to claim 15, characterized in that, The longitudinal section of each of the first gear tooth (5111) and the second gear tooth (5121) gradually decreases from the inside to the outside.

17. The plug valve according to claim 15, characterized in that, An oil reservoir (513) is formed between multiple first gear teeth (5111) and second gear teeth (5121).

18. The plug valve according to claim 14, characterized in that, It also includes a limiting structure (6) for limiting the position of the gear shifter (51). The limiting structure (6) includes a first limiting component (61) and a second limiting component (62). The first limiting component (61) is connected to the valve core (2), and the second limiting component (62) is connected to the valve body (1). The cooperation of the first limiting component (61) and the second limiting component (62) prevents the gear shifter (51) and the valve core (2) from dislodging from the valve body cavity (10).

19. The plug valve according to claim 18, characterized in that, The first limiting component (61) includes: A retaining ring (611) is provided on the outer periphery of the valve core (2) for installing the retaining ring (611). The retaining ring (611) is inserted into the retaining ring groove (25) and abuts against the top surface of the gear shifter (51) to prevent the gear shifter (51) from moving along the axial direction of the valve core (2).

20. The plug valve according to claim 18, characterized in that, The second limiting component (62) includes: Multiple mounting blocks (621) are connected to the side of the valve body (1) near the valve cover (4), and each mounting block (621) has a U-shaped groove (6211) on its inner side. A limiting ring (622) is inserted into each of the U-shaped grooves (6211), and the plurality of U-shaped grooves (6211) together limit the limiting ring (622); The axial projection of the limiting ring (622) and the axial projection of the gear shifter (51) overlap to prevent the gear shifter (51) from dislodging from the valve body cavity (10).

21. A gas stove, characterized in that, Includes the plug valve as described in any one of claims 1-20.

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