Stopcock and hob

Abstract

The application provides a cock valve and a stove. The cock valve comprises a valve core and a valve shell. The valve core is surrounded to form a hollow valve core cavity, a valve core air inlet communicating with the valve core cavity is formed in the side wall of the valve core, and the bottom of the valve core is provided with a valve core inner ring air outlet. The valve shell is surrounded to form a valve shell cavity, a valve shell air inlet and a valve shell outer ring air outlet communicating with the valve shell cavity are formed in the side wall of the valve shell, and the valve core has a first position when rotating in the valve shell cavity. Wherein, the end of the valve core close to the valve shell corresponding to the valve core air inlet is provided with a gas guide groove communicating with the valve core air inlet, the width of the gas guide groove along the circumference of the valve core is greater than the hole diameter of the valve core air inlet, and the overlapping area of the gas guide groove and the valve shell air inlet increases when the valve core rotates in the valve shell cavity and is in the first position. The valve core of the cock valve is replaced by the gas guide groove to replace the valve core air inlet and the valve shell air inlet, so that the gas enters the inner ring air channel of the valve shell in advance and adjusts the gas concentration, so that the ignition is successful at one time, and abnormal combustion such as deflagration is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of kitchen appliances, in particular to a plug valve and a gas stove. BACKGROUND

[0002] In a household gas stove, the most important control component is the control valve of the gas stove. Most of the gas valves of the gas stove currently use plug valves for control. The plug valve generally controls the opening and closing of the gas stove, the on-off of the gas, the size of the fire, and the like. Therefore, the gas valve of the gas stove controls the size and rate of the gas entering and exiting the gas stove, and even the flow direction of the gas.

[0003] However, during use and adjustment of the gas stove, the following problems still exist: the success rate of one-time ignition is low, multiple ignitions are required, and an explosion occurs during ignition; it is difficult to smoothly adjust the fire during adjustment of the fire, the adjustment range of the fire does not match or is not harmonious with the adjustment of the valve core, and the cooking needs of the user cannot be met; backfire occurs during extinguishing of the fire, an extinguishing explosion sound occurs, and the user experience is affected. SUMMARY

[0004] The purpose of the present application is to provide a plug valve. The valve core of the plug valve is connected to the valve shell gas inlet through a gas guide groove instead of the valve core gas inlet, so that the gas enters the inner ring gas channel of the valve shell in advance and adjusts the gas concentration. The one-time ignition success rate is high, the gas concentration has a gradient, the gas can be normally burned after ignition, and abnormal combustion such as explosion is avoided.

[0005] To achieve the purpose of the present application, the following technical solutions are adopted:

[0006] According to one aspect of the present application, a plug valve is provided, which includes a valve core and a valve shell. The valve core is surrounded to form a hollow valve core cavity. The side wall of the valve core is provided with a valve core gas inlet communicating with the valve core cavity. The bottom of the valve core has a valve core inner ring gas outlet. The valve shell is surrounded to form a valve shell cavity. The side wall of the valve shell is provided with a valve shell gas inlet and a valve shell outer ring gas outlet, which communicate with the valve shell cavity. The valve core has a first position when rotating in the valve shell cavity. The valve core is provided with a gas guide groove communicating with the valve core gas inlet near one end of the valve shell corresponding to the valve core gas inlet. The width of the gas guide groove along the circumference of the valve core is greater than the hole diameter of the valve core gas inlet. When the valve core rotates in the valve shell cavity and is in the first position, the overlapping area of the gas guide groove and the valve shell gas inlet increases.

[0007] According to one embodiment of the present application, the angle range of the gas guide groove extending along the circumference of the valve core is 40° to 90°, and the width of the gas guide groove is 2mm to 4mm.

[0008] According to an embodiment of the present application, wherein the side wall of the valve core is further provided with an adjusting hole communicating with the valve core cavity, and the adjusting hole communicates with the outer ring outlet of the valve shell when the valve core is in the first position.

[0009] According to an embodiment of the present application, wherein the adjusting hole is coaxial with the outer ring outlet of the valve shell when the valve core is in the first position, and the included angle between the inlet of the valve core and the inlet of the valve shell is 70°.

[0010] According to an embodiment of the present application, wherein the side wall of the valve core is further provided with an outer ring outlet of the valve core communicating with the valve core cavity, and the valve core has a second position when it rotates relative to the valve shell, and the valve core is configured to have the maximum overlapping area between the inlet of the valve core and the inlet of the valve shell and the maximum overlapping area between the outer ring outlet of the valve core and the outer ring outlet of the valve shell when it is in the second position.

[0011] According to an embodiment of the present application, wherein the side wall of the valve core is further provided with an adjusting hole and an outer ring outlet of the valve core respectively communicating with the valve core cavity, the outer ring outlet of the valve core is opposite to the inlet of the valve core, the adjusting hole is arranged between the outer ring outlet of the valve core and the inlet of the valve core, and the communication between the outer ring outlet of the valve shell and the adjusting hole is switched to the communication between the outer ring outlet of the valve shell and the outer ring outlet of the valve core when the valve core rotates from the first position to the second position.

[0012] According to an embodiment of the present application, wherein the valve core has a third position when it rotates in the valve shell cavity, and the valve core is configured to have the guide groove communicate with the inlet of the valve shell and the outer ring outlet of the valve core disconnect from the outer ring outlet of the valve shell when it is in the third position.

[0013] According to an embodiment of the present application, wherein the communication area between the outer ring outlet of the valve core and the outer ring outlet of the valve shell decreases to complete disconnection when the valve core moves from the second position to the third position.

[0014] According to an embodiment of the present application, wherein the valve core has a fourth position when it rotates in the valve shell cavity, and the valve shell inlet communicates with the adjusting hole when the valve core is in the fourth position.

[0015] According to an embodiment of the present application, wherein the communication area between the inlet of the valve core and the inlet of the valve shell decreases to complete disconnection and the communication area between the inlet of the valve shell and the adjusting hole increases to complete communication when the valve core moves from the third position to the fourth position.

[0016] According to an embodiment of the present application, the plug valve further comprises a valve cover connected to the top of the valve housing cavity to limit rotation of the valve cover within the valve housing cavity.

[0017] According to another aspect of the present application, a stove is provided. The stove comprises the aforementioned plug valve, a toggle and a micro switch. The toggle is connected to the top of the valve core; the micro switch is connected to one side of the valve housing; wherein the valve core is in abutment with the micro switch when the stove is in a non-working state, and the valve core is out of abutment with the micro switch when the valve core is in the first position.

[0018] An embodiment of the present application has the following advantages or benefits:

[0019] The valve core of the plug valve of the present application is connected to the valve housing through a gas guide groove instead of the valve core gas inlet and the valve housing gas inlet, so that the gas enters the inner ring gas channel of the valve housing in advance and adjusts the gas concentration, so that the ignition is successful at the first time. Meanwhile, the gas concentration has a gradient, so that the gas can be normally combusted after ignition, and abnormal combustion such as deflagration is avoided. The included angle between the line from the left end of the gas guide groove to the center of the valve core and the line from the right end of the gas guide groove to the center of the valve core is 40° to 90°, which plays a role of "peak flattening" and "peak elimination", so that the adjustment is more gentle. The existence of the gas guide groove delays the gas cutoff time, so that the gas flow is slowly weakened until zero, the flow action time is increased, backfire is prevented, and flameout and booming are avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] The above and other features and advantages of the present application will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings.

[0021] Figure 1 is a perspective view of a plug valve according to an exemplary embodiment.

[0022] Figure 2 is an exploded view of a plug valve according to an exemplary embodiment.

[0023] Figure 3 is a schematic view of a valve core of a plug valve in a non-working state according to an exemplary embodiment.

[0024] Figure 4 is a schematic view of a valve core of a plug valve in a first position according to an exemplary embodiment.

[0025] Figure 5 is a schematic view of a valve core of a plug valve in a second position according to an exemplary embodiment.

[0026] Figure 6 is a schematic view of a valve core of a plug valve in a third position according to an exemplary embodiment.

[0027] Figure 7 is a schematic view of a valve core of a plug valve according to an exemplary embodiment in a fourth position.

[0028] In the drawings:

[0029] 1, valve core; 11, valve core cavity; 12, valve core inlet; 13, valve core inner ring outlet; 14, air guide groove; 15, adjusting hole; 16, valve core outer ring outlet; 2, valve shell; 21, valve shell cavity; 22, valve shell inlet; 23, valve shell outer ring outlet; 24, valve shell outer ring air passage; 25, valve shell inner ring air passage; 26, valve shell inlet passage; 3, valve cover; 4, knob; 5, micro switch; 6, valve rod. DETAILED DESCRIPTION

[0030] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings; however, the example embodiments can be implemented 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 scope of the example embodiments to those skilled in the art. Like reference numerals refer to like elements throughout the several views and the detailed description.

[0031] The terms "a," "an," "the" and "said" are used to refer to one or more than one (i.e., to "at least one") of the referenced elements / constituents / etc.; the terms "comprising," "having" and "including" are used to mean "including but not limited to;" and the term "consisting essentially of" means including an element / constituent / etc. that does not materially change the basic and novel characteristics of the claimed application.

[0032] As Figures 1 to 7 shown, Figure 1 a perspective view of a plug valve according to an exemplary embodiment is shown. Figure 2 an exploded view of a plug valve according to an exemplary embodiment is shown. Figure 3 a schematic view of a valve core 1 of a plug valve according to an exemplary embodiment in a non-working state is shown. Figure 4 a schematic view of a valve core 1 of a plug valve according to an exemplary embodiment in a first position is shown. Figure 5 a schematic view of a valve core 1 of a plug valve according to an exemplary embodiment in a second position is shown. Figure 6 a schematic view of a valve core 1 of a plug valve according to an exemplary embodiment in a third position is shown. Figure 7 a schematic view of a valve core 1 of a plug valve according to an exemplary embodiment in a fourth position is shown.

[0033] The plug valve of the embodiment of the present application comprises a valve core 1 and a valve shell 2. The valve core 1 is surrounded to form a hollow valve core cavity 11, a valve core air inlet 12 is formed in the side wall of the valve core 1 and communicates with the valve core cavity 11, and the bottom of the valve core 1 is provided with a valve core inner ring air outlet 13. The valve shell 2 is surrounded to form a valve shell cavity 21, a valve shell air inlet 22 and a valve shell outer ring air outlet 23 are formed in the side wall of the valve shell 2 and communicate with the valve shell cavity 21. When the valve core 1 rotates in the valve shell cavity 21, the valve core 1 has a first position. The valve core 1 is provided with a gas guide groove 14 corresponding to the valve core air inlet 12 and communicating with the valve core air inlet 12 at the end close to the valve shell 2. The width of the gas guide groove 14 along the circumference of the valve core 1 is greater than the hole diameter of the valve core air inlet 12. When the valve core 1 rotates in the valve shell cavity 21 and is in the first position, the overlapping area of the gas guide groove 14 and the valve shell air inlet 22 is increased.

[0034] As shown in Figures 1 to 4 , the valve shell 2 is provided with a left valve shell outer ring air channel 24, a middle valve shell inner ring air channel 25 and a right valve shell air inlet channel 26. The valve shell air inlet 22 corresponds to the valve shell air inlet channel 26, the valve shell inner ring air outlet corresponds to the valve shell inner ring air channel 25, and the valve shell outer ring air outlet 23 corresponds to the valve shell outer ring air channel 24. The valve core 1 is surrounded to form a hollow valve core cavity 11. The bottom of the valve core 1 is opened to form a valve core inner ring air outlet 13. The bottom of the valve shell 2 is provided with a valve shell inner ring air outlet. After the outer periphery of the valve core 1 abuts against the inner periphery of the valve shell 2, the valve core inner ring air outlet 13 at the bottom of the valve core 1 and the valve shell inner ring air outlet in the side wall of the bottom of the valve shell 2 are communicated. The valve core 1 is surrounded to form a valve core cavity 11 with an open lower end. The side wall of the valve core 1 is provided with a valve core air inlet 12. The outer end of the valve core air inlet 12 is provided with a gas guide groove 14. The gas guide groove 14 is arranged along the circumferential direction of the valve core 1. The extension width of the gas guide groove 14 along the circumference of the valve core 1 is greater than the hole diameter of the valve core air inlet 12. Therefore, when the valve core 1 rotates to the first position, the valve core air inlet 12 is first connected to the valve shell air inlet 22 through the gas guide groove 14 with a flow area smaller than the cross-sectional area of the valve core air inlet 12. The greater the rotation angle, the greater the flow area, and the greater the gas flow. The gas is allowed to enter the combustion chamber of the burner in advance and adjust the gas concentration for ignition of the combustion chamber. The concentration in the burner gradually increases. The gas concentration in the combustion chamber exists in a progressive gradient. The gas ignites immediately after the electric spark is applied. The gas can be normally burned after ignition. The ignition is successful once. Abnormal combustion such as deflagration is avoided.

[0035] Specifically, as shown in Figure 3 , in the non-working state, the valve core air inlet 12 and the valve shell air inlet 22 are in a vertical state, the valve core air inlet 12 is disconnected from the valve shell air inlet 22, and the gas guide groove 14 is arranged at the outer end of the valve core air inlet 12. When the fire starts, the valve core 1 rotates counterclockwise, and the valve core 1 in the initial state rotates by 20° to reach the first position. Figure 4As shown, the valve core 1 continues to rotate. At this time, the right end of the air guide groove 14 begins to connect with the air inlet 22 of the valve body. As the valve core 1 rotates further, the connection area between the air inlet 12 of the valve core and the air inlet 22 of the valve body further increases. In the process of this flow area gradually increasing, the gas gradually flows through the flow surface and enters the valve core cavity 11.

[0036] In a preferred embodiment of the present invention, the air guide groove 14 extends circumferentially along the valve core 1 at an angle ranging from 40° to 90°, and the width of the air guide groove 14 is from 2 mm to 4 mm.

[0037] The angle between the line connecting the left end of the air guide groove 14 to the center of the valve core 1 and the line connecting the right end of the air guide groove 14 to the center of the valve core 1 is 40° to 90°. When the diameter of the valve core air inlet 12 is 4.5cm, the right end of the air guide groove 14 extends a distance to the right side of the valve core air inlet 12, which can gradually increase the gas concentration in the burner before ignition. The left end of the air guide groove 14 extends a distance to the left side of the valve core air inlet 12, which can gradually reduce the gas concentration in the burner when the connection between the valve core air inlet 12 and the valve housing air inlet 22 is disconnected. After continuing to rotate the valve core 1, the gas concentration can be adjusted when the gas concentration adjustment hole 15 is connected to the valve housing air inlet 22. Preferably, the angle of the air guide groove 14 extending circumferentially along the valve core 1 is 86°, and the width of the air guide groove 14 is 2mm to 4mm, ensuring that the gas can effectively enter the valve core air inlet 12 through the air guide groove 14.

[0038] In a preferred embodiment of the present invention, the side wall of the valve core 1 is further provided with an adjustment hole 15 that communicates with the valve core cavity 11. When the valve core 1 is in the first position, the adjustment hole 15 communicates with the air outlet 23 of the outer ring of the valve shell.

[0039] like Figures 1 to 4 As shown, an adjustment hole 15 is provided on the side wall. When the valve core 1 rotates from the first position to the second position, the gas enters the valve core inlet 12 through the valve housing inlet 22 via the gas guide groove 14, and then enters the valve core cavity 11. Part of the gas entering the valve core cavity 11 enters the valve housing outer ring outlet 23 through the adjustment hole 15, thereby increasing the gas concentration entering the valve housing outer ring gas passage 24. The small diameter of the adjustment hole 15 can slow down the rate of increase in gas concentration from the outer ring to the inside, thus avoiding the defect of failure to ignite when the ignition needle discharges when the gas concentration increases instantaneously. At the same time, the adjustment hole 15 and the gas guide groove 14 can further improve the success rate of first ignition.

[0040] In a preferred embodiment of the present invention, when the valve core 1 is in the first position, the adjusting hole 15 is coaxial with the air outlet 23 of the outer ring of the valve housing, and the included angle between the air inlet 12 of the valve core and the air inlet 22 of the valve housing is 70°.

[0041] like Figure 4As shown, the angle between the valve core inlet 12 and the valve shell inlet 22 is 90° when the stove is in a non-working state, and the valve core 1 is counterclockwise rotated when the fire is needed, and is converted from the non-working state to the first position, and when the angle between the valve core inlet 12 and the valve shell inlet 22 is 70°, the adjusting hole 15 is coaxially arranged with the valve shell outer ring gas outlet 23, the valve core 1 continues to rotate to the second position, so that the gap is formed between the gas guide groove 14 and the valve shell inlet 22, and a part of the gas gradually enters the inner ring channel through the valve core inner ring gas outlet 13, and a part of the gas gradually enters the outer ring channel through the adjusting hole 15 and the valve shell outer ring gas outlet 23, and the gas concentration in the inner ring channel and the outer ring channel is gradually increased, and the ignition success rate is improved when the ignition needle is ignited.

[0042] In a preferred embodiment of the present application, the side wall of the valve core 1 is further provided with a valve core outer ring gas outlet 16 communicated with the valve core cavity 11, and the valve core 1 has a second position relative to the valve shell 2, and the valve core 1 is configured to be in the second position, the overlapping area of the valve core inlet 12 and the valve shell inlet 22 is maximum, and the overlapping area of the valve core outer ring gas outlet 16 and the valve shell outer ring gas outlet 23 is maximum.

[0043] As shown in Figure 4 and Figure 5 , the valve core 1 continues to rotate in the first position, and when the adjusting hole 15 is disconnected with the valve shell outer ring gas outlet 23, the valve core inlet 12 is communicated with the valve shell inlet 22, and the valve core outer ring gas outlet 16 is communicated with the valve shell outer ring gas outlet 23, and when the valve core inlet 12 is opposite to the valve shell inlet 22, and the valve core outer ring gas outlet 16 is opposite to the valve shell outer ring gas outlet 23, the gas flow rate entering the outer ring channel and the inner ring channel reaches the maximum, so that the stove is in a fierce fire state, that is, the outer ring and the inner ring are in a fierce fire state at the same time, and at this time, the valve core 1 is in the second position, the angle between the valve shell outer ring gas outlet 23 and the adjusting hole 15 is 70°, and the valve core 1 continues to rotate counterclockwise to the third position, the valve core inlet 12 and the valve shell inlet 22 are gradually misaligned until only the gas guide groove 14 and the valve shell inlet 22 have an overlapping part, and after the valve core outer ring gas outlet 16 and the valve shell outer ring gas outlet 23 are completely misaligned, the valve core 1 rotates from the second position to the third position.

[0044] In a preferred embodiment of the present application, the side wall of the valve core 1 is further provided with an adjusting hole 15 and a valve core outer ring gas outlet 16 communicated with the valve core cavity 11 respectively, the valve core outer ring gas outlet 16 is oppositely arranged with the valve core inlet 12, and the adjusting hole 15 is arranged between the valve core outer ring gas outlet 16 and the valve core inlet 12, and when the valve core 1 rotates from the first position to the second position, the communication between the valve shell outer ring gas outlet 23 and the adjusting hole 15 is converted to the communication between the valve shell outer ring gas outlet 23 and the valve core outer ring gas outlet 16.

[0045] As shown in Figure 4 and Figure 5As shown, the valve core outer ring gas outlet 16 is arranged on the left side, the valve core gas inlet 12 is arranged on the right side and opposite to the valve core outer ring gas outlet 16, the adjusting hole 15 is arranged between the valve core outer ring gas outlet 16 and the valve core gas inlet 12, further, the included angle between the adjusting hole 15 and the valve core outer ring gas outlet 16 is 70°, when the valve core 1 rotates from the first position to the second position, the overlapping part of the adjusting hole 15 and the valve shell outer ring gas outlet 23 gradually decreases until completely misaligned, then the valve shell outer ring gas outlet 23 is communicated with the valve core outer ring gas outlet 16, and the adjusting hole 15 can inject gas into the outer ring channel through the valve shell outer ring gas outlet 23.

[0046] Specifically, when the valve core 1 is in the first position, the valve core 1 is located at a position rotated counterclockwise by 20° from the non-working state, and when the valve core 1 is in the second position, the valve core 1 is located at a position rotated counterclockwise by 90° from the non-working state.

[0047] In a preferred embodiment of the present application, the valve core 1 has a third position when rotating in the valve shell cavity 21, and the valve core 1 is configured to be in the third position, the gas guide groove 14 is communicated with the valve shell gas inlet 22, and the valve core outer ring gas outlet 16 is disconnected with the valve shell outer ring gas outlet 23.

[0048] As shown, Figure 6 When the valve core 1 is in the third position, the left end of the gas guide groove 14 is communicated with the valve shell gas inlet 22, and the communication area of the gas guide groove 14 and the valve shell gas inlet 22 is small, and the valve core outer ring gas outlet 16 and the valve shell outer ring gas outlet 23 are disconnected, at this time, the gas flowing through the valve shell gas inlet 22, the gas guide groove 14 and the valve core gas inlet 12 in turn can only flow out to the valve shell inner ring gas channel 25 through the valve core inner ring gas outlet 13 at the bottom of the valve core 1, at this time, the fire state of the stove is the state of no fire in the outer ring and large fire in the inner ring.

[0049] Specifically, when the valve core 1 is in the third position, the valve core 1 is located at a position rotated counterclockwise by 145° from the non-working state.

[0050] In a preferred embodiment of the present application, when the valve core 1 moves from the second position to the third position, the communication area of the valve core outer ring gas outlet 16 and the valve shell outer ring gas outlet 23 decreases to complete disconnection.

[0051] As shown, Figure 5 and Figure 6As shown, when valve core 1 is in the second position, it is in a non-working state and rotated 90° counterclockwise. When valve core 1 is in the third position, it is in a non-working state and rotated 145° counterclockwise. As valve core 1 continues to rotate counterclockwise from the second position to the third position, the overlapping area of ​​the valve core outer ring outlet 16 and the valve body outer ring outlet 23 gradually decreases, thus reducing the connection area until it is completely disconnected. This results in less and less gas entering the outer ring channel through the valve body outer ring outlet 23, and the outer ring flame becomes smaller and smaller until it is completely closed. When the valve core inlet 12 and the valve body inlet 22 do not intersect, the gas is guided... The groove 14 delays the gas cutoff time, causing the gas flow rate that flows sequentially through the valve body inlet 22, the guide groove 14, and the valve core inlet 12 to gradually decrease until it reaches zero. This increases the flow rate action time, prevents backfire, and avoids flameout and knocking. The length of the guide groove 14 along the circumference of the valve core 1 is greater than the orifice diameter of the valve core inlet 12, which increases the gas flow rate adjustment range by approximately 90°. That is, when the angle between the position of the valve core 1 and its non-working state is between 20° and 110°, whereas the current standard is generally 50°, that is, when the angle between the position of the valve core 1 and its non-working state is between 40° and 90°. This plays a role in "peak leveling" and "peak reduction", making the adjustment smoother.

[0052] In a preferred embodiment of the present invention, the valve core 1 has a fourth position when it rotates in the valve housing cavity 21. When the valve core 1 is configured to be in the fourth position, the valve housing air inlet 22 is connected to the adjustment hole 15.

[0053] like Figure 7 As shown, when valve core 1 is in the fourth position, valve core 1 rotates 180° counterclockwise from the non-working state, and the valve body air inlet 22 is connected to the adjustment hole 15. The gas entering the valve core cavity 11 is restricted by the adjustment hole 15, thereby controlling the amount of gas entering the valve body inner ring gas passage 25 through the valve core inner ring gas outlet 13. Thus, when the adjustment hole 15 and the valve core inner ring gas outlet 13 are fully connected, the inner ring flame of the stove is always in a low flame state.

[0054] In a preferred embodiment of the present invention, when the valve core 1 moves from the third position to the fourth position, the communication area between the valve core air inlet 12 and the valve housing air inlet 22 decreases to be completely disconnected, and the communication area between the valve housing air inlet 22 and the adjustment hole 15 increases to be completely connected.

[0055] like Figure 6 and Figure 7As shown, when valve core 1 is in the third position, valve core 1 is in a non-working state and rotated 145° counterclockwise. When valve core 1 is in the fourth position, valve core 1 is in a non-working state and rotated 180° counterclockwise. When valve core 1 rotates counterclockwise from the third position to the fourth position, the overlapping area of ​​air guide groove 14 and valve body air inlet 22 gradually decreases. When the overlapping area of ​​air guide groove 14 and valve body air inlet 22 decreases to zero, the overlapping area of ​​adjustment hole 15 and valve body air inlet 22 gradually increases, thereby gradually increasing the communication area between valve body air inlet 22 and adjustment hole 15 until they are completely connected.

[0056] In a preferred embodiment of the present invention, the plug valve further includes a valve cover 3, which is connected to the top of the valve housing cavity 21 to confine the valve cover 3 within the valve housing cavity 21 for rotation.

[0057] like Figure 1 and Figure 2 As shown, the valve housing 2 surrounds a valve housing cavity 21 with an opening at the top. The valve core 1 is installed into the valve housing cavity 21 from top to bottom. The valve cover 3 is installed onto the top of the valve housing cavity 21 from top to bottom and is fixed to the valve housing 2 with screws to limit the valve core 1, so that the valve core 1 can rotate along its central axis in the valve housing cavity 21.

[0058] In this invention, the valve core 1 of the plug valve is connected to the valve body inlet 22 in advance via the air guide groove 14 instead of the valve core inlet 12. This allows the gas to enter the inner ring gas passage of the valve body 2 in advance and adjust the gas concentration, ensuring successful ignition on the first attempt. At the same time, the gas concentration increases gradually, allowing the gas to burn normally after ignition and avoiding abnormal combustion such as deflagration. The angle formed by the line connecting the left end of the air guide groove 14 to the center of the valve core 1 and the line connecting the right end of the air guide groove 14 to the center of the valve core 1 is 40° to 90°, which plays a role in "peak leveling" and "peak reduction", making the adjustment smoother. The presence of the air guide groove 14 delays the gas interruption time, allowing the gas flow to gradually decrease until it reaches zero, increasing the flow duration, preventing backfire, and avoiding flameout and knocking.

[0059] The stove of this embodiment includes the aforementioned stopcock valve, lever 4, and micro switch 5. Lever 4 is connected to the top of valve core 1; micro switch 5 is connected to one side of valve housing 2; wherein, when the stove is in a non-working state, valve core 1 abuts against micro switch 5, and when valve core 1 is in a first position, it is released from abutment against micro switch 5.

[0060] like Figure 1 and Figure 2As shown, the plug valve also includes a valve stem 6 and a panel. The panel has a valve hole, through which the valve stem 6 passes. The middle part of the valve stem 6 is elastically connected to the valve cover 3 by a spring to reset the valve stem 6 after it is pressed down. The lower end of the valve stem 6 passes through the valve cover 3. After being pressed down, the valve stem 6 is inserted into the upper end of the valve core 1 so that the valve core 1 can rotate synchronously with the valve stem 6. The lever 4 is connected to the top of the valve core 1. When the stove is finished or in the off state, the lever presses against the spring of the micro switch 5, so that the micro switch 5 is in the off state. When in use, the valve stem 6 is usually pressed down first and then rotated counterclockwise. After rotation, the lever sleeved on the valve core 1 also rotates synchronously, causing the lug on the lever to leave the micro switch 5. The micro switch 5 becomes open under the action of its own internal spring force. When the micro switch 5 is open, it transmits this signal to the controller, which can control the ignition needle to perform the ignition action.

[0061] In this embodiment of the invention, the term "multiple" refers to two or more, unless otherwise explicitly defined. The terms "install," "connect," and "fix" should be interpreted broadly. For example, "connect" can mean a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention based on the specific circumstances.

[0062] In the description of the embodiments of the present invention, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention.

[0063] In the description of this specification, the terms "an embodiment," "a preferred embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0064] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. For those skilled in the art, the embodiments of the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of the present invention should be included within the protection scope of the embodiments of the present invention.

Claims

1. A plug valve, characterized in that, include: A valve core (1) is provided, which surrounds a hollow valve core cavity (11). The side wall of the valve core (1) has a valve core air inlet (12) communicating with the valve core cavity (11). The bottom of the valve core (1) has a valve core inner ring air outlet (13). The valve housing (2) surrounds and forms a valve housing cavity (21). The side wall of the valve housing (2) is provided with a valve housing air inlet (22) and a valve housing outer ring air outlet (23) communicating with the valve housing cavity (21). When the valve core (1) rotates in the valve housing cavity (21), it has a first position. Wherein, the valve core (1) is provided with an air guide groove (14) that communicates with the air guide groove (12) at one end of the valve core inlet (12) near the valve shell (2). The width of the air guide groove (14) along the circumference of the valve core (1) is greater than the aperture of the air guide groove (12). When the valve core (1) rotates in the valve shell cavity (21) and is in the first position, the overlap area between the air guide groove (14) and the air guide groove (22) of the valve shell increases. The air guide groove (14) extends circumferentially along the valve core (1) at an angle ranging from 40° to 90°, and the width of the air guide groove (14) is from 2 mm to 4 mm. The valve core (1) is also provided with an adjustment hole (15) that communicates with the valve core cavity (11). When the valve core (1) is in the first position, the adjustment hole (15) communicates with the air outlet (23) of the outer ring of the valve shell. The valve core (1) is also provided with an outer ring air outlet (16) communicating with the valve core cavity (11) on its side wall. When the valve core (1) rotates relative to the valve shell (2), it has a second position. When the valve core (1) is configured to be in the second position, the overlap area between the valve core air inlet (12) and the valve shell air inlet (22) is the largest, and the overlap area between the outer ring air outlet (16) and the outer ring air outlet (23) of the valve shell is the largest.

2. The plug valve according to claim 1, characterized in that, When the valve core (1) is in the first position, the adjusting hole (15) is coaxial with the air outlet (23) of the outer ring of the valve body, and the included angle between the air inlet (12) of the valve core and the air inlet (22) of the valve body is 70°.

3. The plug valve according to claim 1, characterized in that, The side wall of the valve core (1) is also provided with an adjustment hole (15) and an outer ring air outlet (16) that are respectively connected to the valve core cavity (11). The outer ring air outlet (16) of the valve core is arranged opposite to the valve core air inlet (12). The adjustment hole (15) is arranged between the outer ring air outlet (16) of the valve core and the valve core air inlet (12). When the valve core (1) rotates from the first position to the second position, the connection between the outer ring air outlet (23) of the valve shell and the adjustment hole (15) is converted into the connection between the outer ring air outlet (23) of the valve shell and the outer ring air outlet (16) of the valve core.

4. The plug valve according to claim 1, characterized in that, When the valve core (1) rotates within the valve housing cavity (21), it has a third position. When the valve core (1) is configured to be in the third position, the air guide groove (14) is connected to the air inlet (22) of the valve housing, and the air outlet (16) of the outer ring of the valve core is disconnected from the air outlet (23) of the outer ring of the valve housing.

5. The plug valve according to claim 4, characterized in that, When the valve core (1) moves from the second position to the third position, the communication area between the valve core outer ring air outlet (16) and the valve housing outer ring air outlet (23) is reduced to a complete disconnection.

6. The plug valve according to claim 4, characterized in that, When the valve core (1) rotates within the valve housing cavity (21), it has a fourth position. When the valve core (1) is configured to be in the fourth position, the valve housing inlet (22) is connected to the adjustment hole (15).

7. The plug valve according to claim 6, characterized in that, When the valve core (1) moves from the third position to the fourth position, the communication area between the valve core air inlet (12) and the valve housing air inlet (22) decreases to be completely disconnected, and the communication area between the valve housing air inlet (22) and the adjustment hole (15) increases to be completely connected.

8. The plug valve according to claim 1, characterized in that, It also includes a valve cover (3), which is connected to the top of the valve housing cavity (21) to confine the valve cover (3) to the valve housing cavity (21) for rotation.

9. A stove, characterized in that, include: The plug valve as described in any one of claims 1 to 8; A lever (4), the lever (4) being connected to the top of the valve core (1); and A micro switch (5) is connected to one side of the valve housing (2); The valve core (1) abuts against the micro switch (5) when the stove is in a non-working state, and the valve core (1) releases from the micro switch (5) when it is in the first position.

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