A plug valve for stoves

Abstract

This invention discloses a stopcock valve for a stove, comprising: a valve body with an upwardly extending vertical shaft hole fixed at the top of the valve body, and an upper notch on the side wall of the vertical shaft hole; a rotating shaft with a flat section, movably inserted into the vertical shaft hole, with an annular control area located below the flat section at the position corresponding to the upper notch on the rotating shaft, the annular control area being divided circumferentially into an outer wall section of the shaft and a groove opening radially outward towards the rotating shaft, the groove being staggered from the flat section; and a position switch disposed outside the vertical shaft hole, the position switch having a contact head transversely passing through the upper notch, the contact head being movable between abutting the outer wall section of the shaft and being inserted into the groove, the stir-fry function being activated when the contact head is inserted into the groove and switched to the released state. The stopcock valve of this invention has a simple structure, not only enabling range judgment of the rotation angle of the rotating shaft, but also reliably activating the stir-fry function.

Description

Technical Field

[0001] This invention relates to the field of cooktops and stopcock valves, and more particularly to a stopcock valve for cooktops. Background Technology

[0002] Currently, in the gas stove industry, stopcock valves typically provide ignition when rotated to 90 degrees, at which point the flow rate is at its maximum. Continuing to rotate counter-clockwise gradually reduces the flow rate. However, the standard design cannot determine the valve's exact rotation angle and current position when rotating the valve shaft. Therefore, it's impossible to implement functions like stove-range linkage, flame display, and high-heat start based on the stopcock valve's rotation angle on the gas stove product.

[0003] In the industry, some manufacturers add multiple microswitches to plug valves to determine different positions, but this method can only determine the position at a specific angle (maximum or minimum value) and cannot determine the range of rotation at any angle.

[0004] In addition, existing gas stoves activate the stir-fry function by setting a separate stir-fry button or pressing down the rotating shaft to trigger a micro switch. Although this method can activate the stir-fry function, it cannot determine the rotation range at any angle. Summary of the Invention

[0005] The present invention aims to at least partially solve one of the problems existing in the existing related technologies. To this end, the present invention proposes a stop valve for stoves, which has a simple structure and can not only determine the range of rotation angle of the rotating shaft, but also reliably activate the stir-fry function.

[0006] The above-mentioned plug valve for a stove is achieved through the following technical solution:

[0007] A stopcock valve for a stove includes: a valve body having a valve chamber, a vertical shaft hole extending upward and communicating with the valve chamber fixedly provided on the top of the valve body, and an upper notch communicating with the vertical shaft hole on the side wall of the vertical shaft hole; a rotating shaft having a flat position, movably inserted into the vertical shaft hole, the rotating shaft having an annular control area located below the flat position at a position corresponding to the upper notch, the annular control area being divided circumferentially into an outer wall section of the shaft and a groove opening radially outward toward the rotating shaft, the groove being staggered from the flat position; and a position switch disposed outside the vertical shaft hole, the position switch having a pressing head extending laterally through the upper notch, the pressing head being movable between abutting the outer wall section of the shaft and being inserted into the groove, the stir-fry function being activated when the pressing head is inserted into the groove and the pressing head is switched to the released state.

[0008] In some embodiments, the groove is located at a first angle to the flat position, wherein the first angle is any one of 90 degrees, 180 degrees, or 270 degrees.

[0009] In some embodiments, when the rotating shaft rotates to the second angle, the pressing head is inserted into the groove and switches to the released state, the second angle being the first angle ±30 degrees.

[0010] In some embodiments, the maximum cutting depth of the groove in the radial direction is 1 mm, and the second angle is the first angle ±15 degrees; or the maximum cutting depth of the groove in the radial direction is 1.5 mm, and the second angle is the first angle ±25 degrees.

[0011] In some embodiments, the end of the pressure head near the rotating shaft has a semi-circular head, and the side of the groove facing its opening is a vertical surface or an inner arc surface, the inner arc surface being curved or recessed toward the inside of the rotating shaft.

[0012] In some embodiments, an arcuate transition surface is formed at the junction of the outer wall section of the shaft and the groove, the arcuate transition surface being curved or protruding radially outward toward the rotating shaft.

[0013] In some embodiments, the bottom surface of the groove is a lower horizontal surface; the top surface of the groove is an upper horizontal surface, or the top surface of the groove is an upper guide surface that is inclined or curved outward from bottom to top.

[0014] In some embodiments, a lower guide surface is formed on the lower side of the upper guide surface, which curves upward and inward.

[0015] In some embodiments, the width of the groove in the circumferential direction is less than half the circumference of the shaft and greater than or equal to one-quarter the circumference of the shaft.

[0016] In some embodiments, a solenoid valve is also included. The valve body is further provided with an outer ring air passage and a stir-fry air passage. The solenoid valve is disposed on the stir-fry air passage and is used to open or close the stir-fry air passage. The position switch is linked to the solenoid valve.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] 1. The plug valve of the present invention has an annular control area located below the flat position on the rotating shaft. The annular control area is divided into an outer wall section and a groove in the circumferential direction. The contact head of the position switch can move between the outer wall section and the groove. In this way, the rotation angle that triggers the position switch to close or open when the rotating shaft rotates can be adjusted according to the width of the groove and the cutting depth, thereby realizing the range judgment of the rotation angle of the rotating shaft.

[0019] 2. When the contact head of the position switch is inserted into the groove and switched to the released state, the position switch is in the open state and the stir-fry function is activated. This realizes the activation of the stir-fry function by triggering the position switch through the groove of the rotating shaft, eliminating the need for an additional stir-fry button on the stove control panel and simplifying the stove structure.

[0020] 3. By forming an arc-shaped transition surface at the junction of the outer wall section of the shaft and the groove, as the groove on the rotating shaft gradually moves away from the contact head of the position switch, it slowly transitions away from the contact head by the arc-shaped transition surface, reducing the lateral force of the contact head, increasing the downward pressure of the contact head, improving the rotation feel, and enhancing reliability. Attached Figure Description

[0021] Figure 1 This is an exploded view of the plug valve in Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic diagram of the plug valve in Embodiment 1 of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the rotating shaft in Embodiment 1 of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of some position switches in Embodiment 1 of the present invention;

[0025] Figure 5 This is a cross-sectional view of the plug valve in Embodiment 1 of the present invention, with the rotating shaft in the zero position.

[0026] Figure 6 This is a cross-sectional view of the plug valve in Embodiment 1 of the present invention, in which the rotating shaft is in the first position;

[0027] Figure 7 This is a cross-sectional view of the plug valve in Embodiment 1 of the present invention, in which the rotating shaft is in the second position;

[0028] Figure 8 This is a cross-sectional view of the plug valve in Embodiment 1 of the present invention, with the rotating shaft in the third position.

[0029] Figure 9 This is a schematic diagram of the structure of the rotating shaft in Embodiment 2 of the present invention;

[0030] Figure 10 This is a cross-sectional view of the plug valve in Embodiment 2 of the present invention, with the rotating shaft in the second position.

[0031] In the diagram: 1-Valve body, 11-Valve chamber, 111-Lower notch, 12-Vertical shaft hole, 121-Upper notch, 131-Outer ring air passage, 132-Stir-fry air passage; 2-Rotating shaft, 21-Flat position, 22-Outer wall section of shaft, 23-Groove, 231-Vertical surface, 232-Inner arc surface, 233-Archive transition surface, 234-Lower horizontal surface, 235-Upper guide surface, 236-Lower guide surface; 3-Position switch, 31-Touch head, 311-Semi-circular head; 4-Solenoid valve; 5-Dial; 6-Ignition switch, 61-Spring. Detailed Implementation

[0032] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific embodiments of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solutions claimed in the present invention.

[0033] Example 1

[0034] refer to Figure 1-2 This embodiment provides a stopcock valve for a stove, including a valve body 1, a rotating shaft 2, and a position switch 3. The valve body 1 has a valve chamber 11, and a vertical shaft hole 12 extending upward and opening upward is fixed on the top of the valve body 1. The lower end of the vertical shaft hole 12 communicates with the valve chamber 11, and an upper notch 121 communicating with the vertical shaft hole 12 is provided on the side wall of the vertical shaft hole 12. The rotating shaft 2 is movably inserted into the vertical shaft hole 12. A flat part 21 is provided at the upper end of the rotating shaft 2. An annular control area (not shown in the figure) is provided below the flat part 21 at the position of the rotating shaft 2 corresponding to the upper notch 121. The annular control area is divided into an outer wall section 22 and a groove 23 opening radially outward towards the rotating shaft 2 along the circumferential direction of the rotating shaft 2. In this embodiment, the outer wall section 22 is arc-shaped to reduce the lateral force of the contact head 31 of the position switch 3, thereby improving the rotation feel of the rotating shaft 2 and enhancing reliability. In addition, the groove 23 and the flat part 21 are arranged in a staggered manner, that is, the side of the groove 23 facing its opening faces differently from the flat part 21 and is not on the same vertical plane.

[0035] Position switch 3 is mounted on top of valve body 1 and located outside vertical shaft hole 12. Position switch 3 has a contact head 31 that extends laterally through upper notch 121. Contact head 31 can move between the section abutting the outer wall of shaft 22 and the section inserted into groove 23. Reference Figure 5 When the touch head 31 abuts against the outer wall section 22 of the shaft, the touch head 311 is in a pressed state, that is, the touch head 311 of the position switch 3 and the rotating shaft 2 are in a pressed fit state. At this time, the position switch 3 is in a closed state, and the stir-fry function is in standby mode; Reference Figure 6-8When the pressure head 31 is inserted into the groove 23 and the pressure head 31 is switched to the released state, the pressure head 311 is in the released state, that is, the pressure head 311 of the position switch 3 and the rotating shaft 2 are in the released engagement state. At this time, the position switch 3 is in the open state or open circuit state and the stir-fry function is activated.

[0036] Therefore, the plug valve of this embodiment has an annular control area located below the flat position 21 on the rotating shaft 2. This annular control area is divided into an outer wall section 22 and a groove 23 along the circumferential direction. The contact head 31 of the position switch 3 can move between the outer wall section 22 and the groove 23. In this way, the limiting of the groove 23 can act on the contact head 31 of the position switch 3 within a certain range. The rotation angle range of the rotating shaft 2 is controlled according to the width and cutting depth of the groove 23, so that the rotation angle position of the rotating shaft 2 presents a range change. Thus, the rotation angle of the rotating shaft 2 is adjusted according to the width and cutting depth of the groove 23 to trigger the position switch 3 to close or open, thereby realizing the range judgment of the rotation angle of the rotating shaft 2. In addition, when the pressing head 31 of the position switch 3 is inserted into the groove 23 and the pressing head 31 is switched to the released state, the position switch 3 is in the open state and the stir-fry function is activated. This realizes that the position switch 3 is triggered by the groove 23 of the rotating shaft 2 to activate the stir-fry function, eliminating the need to set an additional stir-fry button on the stove control panel, which helps to simplify the stove structure.

[0037] refer to Figure 1-2 A lower notch 111 communicating with the valve chamber 11 is provided on the side wall of the valve body 1. In this embodiment, the lower notch 111 is located below the upper notch 121, and the lower notch 111 and the upper notch 121 are staggered. The valve body 1 is also provided with an outer ring gas passage 131 and a stir-fry gas passage 132. The outer ring gas passage 131 is used to provide the gas required for combustion in the high-heat zone of the stove, and the stir-fry gas passage 132 is used to provide the gas required for stir-frying after the stir-frying function of the stove is activated.

[0038] refer to Figure 1-3The groove 23 is located at the first angle in the positive direction of the flat position 21. The first angle can be any one of 90 degrees, 180 degrees, or 270 degrees. Of course, the first angle can also be designed to be any angle other than 0 degrees and 160 degrees. It should be noted that the groove 23 is located at the first angle in the positive direction of the flat position 21, specifically meaning that the groove 23 is located in the counterclockwise direction of the flat position 21, and the angle between the groove 23 and the flat position 21 is the first angle. Therefore, when the rotating shaft 2 is at the first angle, the contact head 31 of the position switch 3 is located in the groove 23 of the rotating shaft 2. At this time, the position switch 3 is in the open state or open circuit state. It can be seen that by rotating the rotating shaft 2, the position of the groove 23 changes. When the position of the groove 23 coincides with the contact head 31 of the position switch, since the cutting depth of the groove 23 is greater than the travel of the contact head 31 of the position switch 3, the contact head 31 of the position switch can be released, thereby putting the position switch 3 in the open state and activating the stir-fry function.

[0039] When the rotating shaft 2 rotates to the second angle, the pressing head 31 is inserted into the groove 23 and switched to the released state. The second angle is ±30 degrees of the first angle. Thus, by restricting the left and right sides of the pressing head 31 by the groove 23, the position switch 3 remains in the open state within the range of the first angle ±30 degrees, and remains in the closed state outside the range of the first angle ±30 degrees. This achieves the purpose of realizing the product function within a specific rotation angle, that is, the stir-fry function can be activated within a specific rotation angle range, allowing the product to identify and judge the rotation angle of the rotating shaft 2.

[0040] Optionally, the maximum cutting depth d of the groove 23 in the radial direction is 1 mm, and the second angle is the first angle ±15 degrees. Alternatively, the maximum cutting depth d of the groove 23 in the radial direction is 1.5 mm, and the second angle is the first angle ±25 degrees.

[0041] refer to Figure 3-4 The pressure head 31 has a semi-circular head 311 at one end near the rotating shaft 2. The side of the groove 23 facing its opening is an inner arc-shaped surface 232, which is curved or recessed towards the inside of the rotating shaft 2. Thus, by matching the semi-circular head 311 with the inner arc-shaped surface 232, it is ensured that when the rotating shaft 2 is at the first angle, the semi-circular head 311 of the position switch 3 is within the groove 23 of the rotating shaft 2, at which point the position switch 3 is in an open or on state. When the rotating shaft 2 needs to rotate to other angles, the groove 23 of the rotating shaft 2 gradually moves away from the semi-circular head 311, slowly transitioning away through the inner arc-shaped surface 232. This reduces the lateral force on the semi-circular head 311, improving the feel of rotating the shaft 2 and increasing reliability. Furthermore, compared to the groove 23 having a vertical surface 231 facing its opening, this inner arc-shaped surface 232 not only reduces the lateral force on the semi-circular head 311 but also improves the accuracy of angle judgment for the stopcock valve rotating shaft 2.

[0042] An arc-shaped transition surface 233 is formed at the junction of the outer wall section 22 and the groove 23. The arc-shaped transition surface 233 bends or protrudes radially outward from the rotating shaft 2. Therefore, when the groove 23 of the rotating shaft 2 moves counterclockwise towards the semi-circular head 311, the arc-shaped transition surface 233 on the left side of the groove 23 slowly transitions into the groove 23. (Refer to...) Figure 6 Alternatively, as the groove 23 of the rotating shaft 2 gradually moves away from the semi-circular head 311 in a counterclockwise direction, it slowly transitions away from the groove 23 via the arc-shaped transition surface 233 on the right side of the groove 23. (Refer to...) Figure 8 By setting the arc-shaped transition surface 233, the semi-circular head 311 can slowly transition into or out of the groove 23. During this process, the lateral force of the semi-circular head 311 of the position switch 3 can be reduced, and the downward pressure of the semi-circular head 311 can be increased, thereby improving the rotation feel of the rotating shaft 2 and enhancing reliability.

[0043] Specifically, the two arc-shaped transition surfaces 233 can serve as the left and right sides of the groove 23 in the circumferential direction. In this case, the left and right sides of the inner arc-shaped surface 232 are fixedly connected to the outer wall section 22 of the shaft through the two arc-shaped transition surfaces 233. Of course, the two arc-shaped transition surfaces 233 may not serve as the left and right sides of the groove 23 in the circumferential direction. In this case, the two arc-shaped transition surfaces 233 serve as the junction between the groove 23 and the outer wall section 22 of the shaft. (Reference) Figure 6 and Figure 8 When the arc-shaped transition surface 233 rotates to the semi-circular head 311, the semi-circular head 311 abuts against the arc-shaped transition surface 233, at which point the position switch 3 switches to the closed state. (Reference) Figure 6-8 When the semi-circular head 311 is on the inner arc surface 232 and between the two arc transition surfaces 233, the semi-circular head 311 is released and the position switch 3 is in the open state. In this way, the position switch 3 is kept in the open state within a specific rotation angle range, and the stir-fry function is kept active, so as to identify and judge the rotation angle of the rotating shaft 2.

[0044] refer to Figure 3 The bottom surface of the groove 23 is a lower horizontal surface 234. The top surface of the groove 23 is an upper guide surface 235 that slopes upwards and outwards; alternatively, the top surface of the groove 23 can be designed as an upper horizontal surface. Furthermore, a lower guide surface 236 that slopes upwards and inwards is formed below the upper guide surface 235. The lower side of the inner arc-shaped surface 232 is fixedly connected to the lower horizontal surface 234, and the upper side is fixedly connected to the upper guide surface 235 via the lower guide surface 236.

[0045] Optionally, the width of the groove 23 in the circumferential direction is less than half the circumference of the rotating shaft 2, and greater than or equal to one-quarter of the circumference of the rotating shaft 2. The width of the inner arc surface 232 in the circumferential direction is greater than the radius of the rotating shaft 2 and less than the diameter of the rotating shaft 2. Therefore, the rotation angle of the rotating shaft 2's rotation trigger position switch 3 can be adjusted according to the width of the inner arc surface 232 of the groove 23, thereby realizing the range determination of the rotation angle position of the rotating shaft 2.

[0046] refer to Figure 1-2 The stopcock valve also includes a solenoid valve 4, which is installed on the stir-fry gas passage 132 and used to open or close the stir-fry gas passage 132. The position switch 3 is linked to the solenoid valve 4. Specifically, when the position switch 3 is in the open state, the solenoid valve 4 opens the stir-fry gas passage 132 to provide the gas required for stir-frying; when the position switch 3 is in the closed state, the solenoid valve 4 closes the stir-fry gas passage 132. In this way, the opening or closing of the stir-fry gas passage 132 is automatically controlled according to the closed or open state of the position switch 3.

[0047] refer to Figure 1-2 The stopcock valve also includes a dial 5 and an ignition switch 6. The dial 5 is rotatably mounted within the valve chamber 11 and fitted onto the lower outer surface of the rotating shaft 2. The ignition switch 6 is located on the outer side wall of the valve body 1 and near the lower notch 111. The ignition switch 6 has contacts (not shown) for controlling its on / off state and a spring 61 for controlling the pressing or releasing of the contacts. The spring 61 is inserted into the lower notch 111 and located below the dial 5. When the rotating shaft 2 is pressed down and rotated, the rotating shaft 2 can push the spring 61 toward the contacts via the dial 5, causing the spring 61 to press the contacts, thereby turning on the ignition switch 6 and sending an ignition signal.

[0048] Example 2

[0049] refer to Figure 9-10 The difference between this embodiment and embodiment 1 is that the side of the groove 23 facing its opening is a vertical surface 231, that is, the inner arc surface 232 is changed to a vertical surface 231. When the contact head of the position switch 3 is placed in the groove 23 with the vertical surface 231, a simple solution is achieved to determine the rotation angle control of the rotating shaft 2.

[0050] It should be noted that when the side of the groove 23 facing its opening is a vertical surface 231, and the diameter of the rotating shaft 2 is large, the rotating shaft 2 is prone to a large deflection angle, resulting in significant angular misalignment and a large deviation of the rotating shaft 2 from its original angle. In this case, the accuracy of the rotation angle position judgment of the rotating shaft 2 is low. In addition, since the groove 23 with the vertical surface 231 cooperates with the contact head of the position switch 3, the rotating shaft 2 exerts an additional lateral force on the contact head when rotating, which will cause the position switch 3 to lower.

[0051] In other embodiments, an arc-shaped transition surface 233 can be added at the junction of the vertical surface 231 and the outer wall section 22 of the shaft. The arc-shaped transition surface 233 bends or protrudes radially outward toward the rotating shaft 2, so that when the semi-circular head 311 slowly transitions into the groove 23 with the vertical surface 231 or slowly transitions out of the groove 23 with the vertical surface 231, the lateral force of the semi-circular head 311 can be reduced, the rotation feel of the rotating shaft 2 can be improved, and the reliability can be enhanced.

[0052] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A stopcock valve for a stove, characterized in that, include: A valve body (1) having a valve chamber (11) has a vertical shaft hole (12) that extends upward and communicates with the valve chamber (11) fixed on the top of the valve body (1), and an upper notch (121) that communicates with the vertical shaft hole (12) is provided on the side wall of the vertical shaft hole (12). A rotating shaft (2) with a flat section (21) is movably inserted into the vertical shaft hole (12). The rotating shaft (2) has an annular control area located below the flat section (21) at the position corresponding to the upper notch (121). The annular control area is divided into an outer wall section (22) and a groove (23) that opens radially outward toward the rotating shaft (2) along the circumferential direction. The groove (23) is staggered from the flat section (21). A position switch (3) is provided on the outside of the vertical shaft hole (12). The position switch (3) has a pressing head (31) that extends laterally through the upper notch (121). The pressing head (31) can move between abutting the outer wall section (22) of the shaft and being inserted into the groove (23). When the pressing head (31) is inserted into the groove (23) and the pressing head (31) is switched to the released state, the stir-fry function is activated.

2. A stopcock valve for a stove according to claim 1, characterized in that, The groove (23) is located at a first angle to the flat position (21), and the first angle is any one of 90 degrees, 180 degrees or 270 degrees.

3. A stopcock valve for a stove according to claim 2, characterized in that, When the rotating shaft (2) rotates to the second angle, the pressing head (31) is inserted into the groove (23) and switched to the released state. The second angle is the first angle ±30 degrees.

4. A stopcock valve for a stove according to claim 3, characterized in that, The maximum cutting depth of the groove (23) in the radial direction is 1 mm, and the second angle is the first angle ±15 degrees; or the maximum cutting depth of the groove (23) in the radial direction is 1.5 mm, and the second angle is the first angle ±25 degrees.

5. A stopcock valve for a stove according to claim 1, characterized in that, The pressure head (31) has a semi-circular head (311) at one end near the rotating shaft (2). The side of the groove (23) facing its opening is a vertical surface (231) or an inner arc surface (232). The inner arc surface (232) is bent or recessed towards the inside of the rotating shaft (2).

6. A stopcock valve for a stove according to claim 1 or 5, characterized in that, An arc-shaped transition surface (233) is formed at the junction of the outer wall section (22) of the shaft and the groove (23), and the arc-shaped transition surface (233) bends or protrudes radially outward toward the rotating shaft (2).

7. A stopcock valve for a stove according to claim 1 or 5, characterized in that, The bottom surface of the groove (23) is a lower horizontal surface (234); the top surface of the groove (23) is an upper horizontal surface, or the top surface of the groove (23) is an upper guide surface (235) that is inclined or bent from bottom to top and outward.

8. A stopcock valve for a stove according to claim 7, characterized in that, A lower guide surface (236) is formed on the lower side of the upper guide surface (235) that curves upward and inward.

9. A stopcock valve for a stove according to claim 1 or 5, characterized in that, The width of the groove (23) in the circumferential direction is less than half the circumference of the shaft (2) and greater than or equal to one-quarter of the circumference of the shaft (2).

10. A stopcock valve for a stove according to any one of claims 1-5, characterized in that, It also includes a solenoid valve (4), and the valve body (1) is also provided with an outer ring air passage (131) and a stir-fry air passage (132). The solenoid valve (4) is set on the stir-fry air passage (132) and is used to open or close the stir-fry air passage (132). The position switch (3) is linked to the solenoid valve (4).

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