Gas valve and gas stove

Abstract

The utility model belongs to valve technical field, specifically discloses a kind of gas valve and gas stove.Gas valve includes valve body, valve core and valve rod of rotation installation in the valve body inside, the valve rod of rotation installation in valve body, the gas valve further includes speed reducer mechanism, the speed reducer mechanism is installed in the valve body inside and is transmission connection between the valve rod and the valve core, the rotation of the valve rod can be driven the valve core relative the valve rod deceleration rotation by the speed reducer mechanism.Gas stove includes above-mentioned gas valve.The utility model can reduce in increasing the rotation adjustment angle of valve rod, reduce the rotation angle of valve core, improve the cooperation reliability of valve core and valve body, improve the use safety of gas valve and gas stove.

Description

Technical Field

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

[0002] Gas stoves are common kitchen appliances in modern homes. They typically regulate the amount of gas supplied during combustion through a gas valve, thereby achieving the purpose of adjusting the combustion heat.

[0003] The existing gas valve includes a valve body, a valve core, and a valve stem. The valve body has a valve cavity, an inlet channel, and multiple outlet channels. The valve core is rotatably mounted within the valve cavity and has an inner cavity communicating with the inlet channel. Multiple vent holes are opened on the side wall of the valve core. The valve stem is vertically positioned with its lower end coaxially connected to the valve core, and its upper end extends beyond the upper side of the valve body and is connected to a knob. The knob is used by the user to rotate the valve stem. When the user rotates the valve stem, the rotation of the valve stem causes the valve core to rotate, thereby connecting the different vent holes with the outlet channels, achieving gas flow regulation, and thus flame control.

[0004] As gas stove flame control becomes increasingly refined, the knob's rotation angle increases compared to conventional gas valves. Because the knob rotates synchronously with the valve core, the area covered by the vent holes on the valve core in the circumferential direction increases, thus reducing the effective sealing area of ​​the valve core. This makes it more susceptible to wear and damage during long-term use, resulting in poor sealing and affecting the safety and reliability of the gas valve. At the same time, the increased stroke of the valve core relative to the valve body leads to increased wear during adjustment, which is detrimental to the long-term reliable use of the valve core and reduces the service life of the gas valve. Utility Model Content

[0005] One of the technical problems solved by this utility model is to provide a gas valve that can effectively solve the problems of increased processing cost, reduced service life and low reliability of existing gas valves with large-angle adjustment valve stems.

[0006] The second technical problem solved by this utility model is to provide a gas stove that can effectively solve the problems of increased operating costs and reduced reliability of existing gas stoves due to high processing costs, short service life, and low reliability of gas valves.

[0007] The first technical problem mentioned above is solved by the following technical solution:

[0008] A gas valve includes a valve body, a valve core rotatably mounted inside the valve body, and a valve stem rotatably mounted on the valve body. The gas valve also includes a reduction mechanism, which is installed inside the valve body and is kinetically connected between the valve stem and the valve core. The rotation of the valve stem can drive the valve core to rotate relative to the valve stem at a reduced speed through the reduction mechanism.

[0009] Compared with the prior art, the gas valve of this utility model has the following advantages: By setting a deceleration mechanism inside the valve body, and the deceleration mechanism being driven between the valve stem and the valve core, when the valve stem rotates to adjust the flame intensity, the first angle of rotation of the valve stem drives the valve stem to rotate a second angle, which is smaller than the first angle. This allows the valve stem to rotate a relatively large angle while the valve core can rotate a relatively small angle, thereby reducing the coverage area of ​​the opening on the valve core in the circumferential direction, better ensuring the effective sealing area of ​​the valve core, and thus ensuring the reliability of the fit between the valve core and the valve body, improving the reliability of the gas valve in use. At the same time, because the rotation angle of the valve core relative to the valve body is reduced, the wear of the valve core is reduced, thereby helping to ensure the service life and long-term reliability of the valve core, and thus improving the service life and long-term reliability of the gas valve.

[0010] In one embodiment, the deceleration mechanism includes a drive gear coaxially sleeved on the valve stem, a driven gear coaxially sleeved on the valve core, and a transmission gear rotatably mounted inside the valve body. The transmission gear meshes with both the drive gear and the driven gear. The drive gear rotates with the valve stem, and the valve core rotates with the driven gear.

[0011] In one embodiment, the transmission gear includes a first gear section and a second gear section arranged coaxially and side by side along the axial direction. The number of teeth in the first gear section is less than the number of teeth in the second gear section. The first gear section meshes with the driving gear, and the second gear section meshes with the driven gear.

[0012] In one embodiment, at least two transmission gears are arranged at circumferential intervals along the drive gear.

[0013] In one embodiment, the driven gear is sleeved on the outer side of the upper end of the valve core, and the upper end of the driven gear is higher than the upper end of the valve core. The lower end of the valve stem is inserted into the inner hole of the driven gear and spaced apart from the driven gear.

[0014] In one embodiment, the driven gear includes a mounting cylinder portion and a gear ring portion coaxially mounted on the upper end of the mounting cylinder portion. The outer diameter of the gear ring portion is larger than the outer diameter of the mounting cylinder portion. The gear ring portion meshes with the second gear portion. The mounting cylinder portion is sleeved on the valve core.

[0015] And / or, the upper end of the valve core has a mounting portion and a limiting step surface arranged around the outside of the mounting portion, the limiting step surface is arranged facing upward, the driven gear is screwed onto the outside of the mounting portion and its lower end abuts against the limiting step surface.

[0016] In one embodiment, the valve stem is vertically floatingly mounted on the valve body, the valve body having an upper mounting cavity and a lower mounting cavity separated by a partition plate, the driving gear being mounted in the upper mounting cavity, and the driven gear being mounted in the lower mounting cavity.

[0017] In one embodiment, the valve body includes a valve seat and a valve cover detachably mounted on the upper end of the valve seat. A partition plate is sandwiched between the valve cover and the valve seat. The partition plate and the valve cover enclose the upper mounting cavity, and the partition plate and the valve seat enclose the lower mounting cavity. The transmission gear is located outside the drive gear and passes through the partition plate.

[0018] In one embodiment, the valve stem includes a main stem body and an end head connected to the lower end of the main stem body. The cross-section of the main stem body is a non-circular cross-section. The inner hole shape of the drive gear is the same as that of the main stem body. The main stem body is slidably inserted into the inner hole of the drive gear and passes through the partition plate. The partition plate is located between the drive gear and the end head.

[0019] In one embodiment, the valve body includes a valve seat and a valve cover detachably mounted on the upper end of the valve seat, the valve stem is rotatably mounted on the valve cover and can float up and down relative to the valve cover, and the valve core is rotatably mounted on the valve seat;

[0020] The valve seat and the valve cover form a side mounting cavity that communicates with the main mounting cavity. The driving gear and the driven gear are both mounted in the main mounting cavity. The transmission gear is mounted in the side mounting cavity via a mounting shaft. The upper end of the mounting shaft is rotatably connected to the valve cover and the lower end is rotatably connected to the valve seat.

[0021] In one embodiment, the upper end of the valve body is provided with a mounting groove, the groove wall of the mounting groove is provided with an anti-rotation protrusion, and the valve stem is rotatably and vertically floatingly inserted through the bottom of the mounting groove;

[0022] A limiting plate is connected to the valve stem, the limiting plate is located in the mounting groove, and the distance between the anti-rotation protrusion and the bottom of the mounting groove is greater than the thickness of the limiting plate.

[0023] The limiting plate has a limiting groove, and when the valve stem is in the initial position, the anti-rotation protrusion is engaged in the limiting groove.

[0024] In one embodiment, the limiting plate includes a main plate portion sleeved on the valve stem, a stop portion protruding radially in a portion of the main plate portion, and the limiting groove is formed on the main plate portion;

[0025] The mounting groove has a protruding starting point limiting part on its groove wall. When the valve stem is in the initial position, the stop part is located between the starting point limiting part and the anti-rotation protrusion and abuts against the starting point limiting part; and / or, the mounting groove has a protruding ending point limiting part on its groove wall. The stop part can abut against the ending point limiting part to limit the maximum angle of rotation of the valve stem relative to the initial position.

[0026] In one embodiment, a limiting ring is provided at the bottom of the mounting groove. The limiting ring extends circumferentially along the mounting groove and its upper side can abut against the stop portion. The first end of the limiting ring is spaced apart on the side of the anti-rotation protrusion away from the starting point limiting portion, and the second end of the limiting ring extends to the ending point limiting portion in a direction away from the anti-rotation protrusion.

[0027] The second technical problem mentioned above is solved by the following technical solution:

[0028] A gas stove, including a gas valve as described above.

[0029] Compared with the prior art, the gas stove described in this utility model has the following advantages: by adopting the above-mentioned gas stove, it is possible to increase the adjustment range of the valve rod on the gas stove, while better ensuring the reliability and service life of the valve core, thereby ensuring the reliability and service life of the gas stove and improving the user experience of the gas stove. Attached Figure Description

[0030] Figure 1 A schematic diagram of the structure of the gas valve provided in this embodiment of the utility model;

[0031] Figure 2 A partial structural cross-sectional view of the gas valve provided in an embodiment of this utility model;

[0032] Figure 3 for Figure 2 A magnified view of a section at point I;

[0033] Figure 4 A schematic diagram of the valve stem and deceleration mechanism provided in an embodiment of this utility model;

[0034] Figure 5 A schematic diagram of the fit between the valve cover and the limiting plate provided in an embodiment of this utility model;

[0035] Figure 6 A schematic diagram of the valve cover provided in an embodiment of this utility model from one perspective;

[0036] Figure 7 This is a schematic diagram of the valve cover provided in an embodiment of the present invention from another perspective.

[0037] Label Explanation:

[0038] 1. Valve body; 11. Valve seat; 12. Valve cover; 121. Mounting groove; 122. Anti-rotation protrusion; 123. Limiting ring; 124. Starting point limiting part; 125. Ending point limiting part; 126. Rod mounting hole; 13. Top cover; 14. Main mounting cavity; 141. Upper mounting cavity; 142. Lower mounting cavity; 15. Side mounting cavity; 16. Fastener;

[0039] 2. Valve stem; 21. Main stem body; 22. End head; 221. Limiting groove;

[0040] 3. Valve core; 31. Main core body; 311. Adjustment chamber; 32. Mounting part; 33. Guide hole; 34. Receiving groove;

[0041] 4. Reduction mechanism; 41. Driving gear; 42. Driven gear; 421. Mounting cylinder; 422. Gear ring; 43. Transmission gear; 431. First gear; 432. Second gear;

[0042] 5. Reset mechanism; 51. Top rod; 511. Main part of the rod; 512. Limiting end; 52. Elastic element; 53. Pressure plate; 54. Sealing ring;

[0043] 6. Partition plate; 61. Clearance hole;

[0044] 7. Limiting plate; 71. Main body plate; 711. Limiting groove; 72. Stop. Detailed Implementation

[0045] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0046] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., 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 this application and simplifying the description, and do not indicate or imply that the device or element 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 this application.

[0047] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0048] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0049] This embodiment provides a gas valve that can be applied to a gas stove to regulate the firepower during gas stove operation, and improves the reliability and ease of manufacturing of both the gas valve and the gas stove.

[0050] like Figure 1 and Figure 2 As shown, the gas valve provided in this embodiment includes a valve body 1, a valve core 3, a valve stem 2, and a reduction mechanism 4. The valve core 3 has an adjustment chamber 311 and a vent hole communicating with the adjustment chamber 311. The valve core 3 is rotatably mounted inside the valve body 1, so that the rotation of the valve core 3 inside the valve body 1 regulates the gas flow rate of the gas valve, thereby achieving flame control. The valve stem 2 is vertically arranged and rotatably mounted on the valve body 1, with its upper end extending out of the valve body 1 for the operator to rotate. The reduction mechanism 4 is drively connected between the valve stem 2 and the valve core 3, so that the rotation of the valve stem 2 drives the valve core 3 to rotate relative to the valve stem 2 at a reduced speed.

[0051] The gas valve provided in this embodiment features a speed reduction mechanism 4 inside the valve body 1, which is connected to the valve stem 2 and valve core 3. When the valve stem 2 rotates to adjust the flame intensity, its rotation at a first angle causes it to rotate at a second angle, which is smaller than the first angle. This allows the valve stem 2 to rotate at a relatively large angle while the valve core 3 rotates at a relatively small angle. This reduces the area covered by the openings on the valve core 3 in the circumferential direction, better ensuring the effective sealing area of ​​the valve core 3. This, in turn, ensures the reliable fit between the valve core 3 and the valve body 1, improving the overall reliability of the gas valve. Simultaneously, the reduced rotation angle of the valve core 3 relative to the valve body 1 reduces wear on the valve core 3, thus extending its service life and long-term reliability, further improving the overall service life and long-term reliability of the gas valve.

[0052] It is worth noting that the way the air inlet and outlet channels are opened on the valve body 1, and the specific structure and adjustment principle of the valve body 1 and valve core 3 in adjusting the gas flow can be set with reference to the existing technology. This is not the focus of this utility model and will not be elaborated here.

[0053] like Figures 2 to 4 As shown, in one embodiment, the reduction mechanism 4 includes a driving gear 41 sleeved on the valve stem 2, a driven gear 42 connected to the valve core 3, and a transmission gear 43 meshing between the driving gear 41 and the driven gear 42. The driving gear 41 is fixed relative to the valve stem 2 in the circumferential direction so that the driving gear 41 rotates with the valve stem 2. The driven gear 42 is fixed relative to the valve core 3 in the circumferential direction so that the valve core 3 rotates with the driven gear 42. Thus, the rotation of the valve stem 2 drives the driving gear 41 to rotate, which in turn drives the driven gear 42 to rotate through the transmission gear 43, and subsequently drives the valve core 3 to rotate. Using a reduction gear structure as the reduction mechanism 4 results in a simple structure, high ease of installation, and high transmission reliability.

[0054] In another embodiment, the reduction mechanism 4 includes a driving belt assembly, a driven belt assembly, and a drive shaft. The driving belt assembly includes a driving pulley sleeved on the valve stem 2, a first drive pulley rotatably mounted on the valve body 1, and a driving belt wound between the driving pulley and the first drive pulley. The driven belt assembly includes a driven pulley sleeved on the valve core 3, a second drive pulley rotatably mounted on the valve body 1, and a driven belt wound between the driven pulley and the second drive pulley. Both the first and second drive pulleys are fixedly sleeved on the drive shaft. By controlling the dimensions of the driving pulley, the first drive pulley, the second drive pulley, and the driven pulley, the transmission ratio is controlled, thereby controlling the ratio of the rotational speed of the valve core 3 to the rotational speed of the valve stem 2. In another embodiment, the pulley can be replaced with a sprocket, and the belt can be replaced with a chain.

[0055] To improve the ease of installation of the valve core 3 and valve stem 2, in one embodiment, the valve core 3 and valve stem 2 are coaxially arranged to improve the overall structural compactness and installation convenience, and to ensure the rotational stability of the valve core 3, thereby improving the ease of setting the reduction mechanism 4. In other embodiments, the valve core 3 and valve stem 2 may also be coaxially arranged.

[0056] The valve stem 2 has an initial state and an adjustment state relative to the valve body 1. When the valve stem 2 is in the initial state, it can be switched to the adjustment state after being pressed and rotated by a preset angle. The valve stem 2 can be slidably installed on the valve body 1 vertically so that the valve stem 2 can switch between the initial height and the lowering height. When the valve stem 2 is in the initial state, the valve stem 2 is at the initial height; after pressing the valve stem 2 to the lowering height, rotating the valve stem 2 can switch the valve stem 2 to the adjustment state.

[0057] The gas valve also includes a reset mechanism 5, which is installed inside the valve seat 11 and includes an elastic element 52. The elastic element 52 is used to apply an elastic force to the valve stem 2 to maintain or return to the initial height, so that the valve stem 2 can be reset upward to the initial height after being released, thereby causing the valve stem 2 to return to the initial state and ensuring the reliability of the gas valve.

[0058] Furthermore, the reset mechanism 5 also includes a push rod 51, which is slidably inserted into the valve core 3 and its upper end abuts against the lower end of the valve stem 2. An elastic element 52 is sleeved on the push rod 51 and acts on the push rod 51, so that the push rod 51 applies an upward elastic force to the valve core 3. This arrangement can reduce the length of the valve cover 12 while realizing the reset of the valve stem 2, thereby reducing the processing difficulty of the valve stem 2.

[0059] Specifically, the valve core 3 has a guide hole 33 that communicates with the regulating cavity 311. The push rod 51 is slidably inserted into the guide hole 33 and its lower end is inserted into the regulating cavity 311. The push rod 51 includes a vertically arranged rod main part 511 and a limiting end part 512 connected to the upper end of the rod main part 511. The limiting end part 512 protrudes radially from the rod main part 511. The elastic member 52 is sleeved on the rod main part 511 and its upper end abuts against the limiting end part 512. Its lower end presses down against the valve core 3. The elastic member 52 is always in a compressed state to apply an upward elastic force to the push rod 51, thereby causing the push rod 51 to push the valve rod 2 upward to reset upward.

[0060] To ensure the connection stability between the push rod 51 and the valve stem 2, a limiting groove 221 is formed at the lower end of the valve stem 2, and the limiting end 512 is accommodated in the limiting groove 221. This prevents relative misalignment between the two and ensures the stability and reliability of the lifting and lowering of the valve stem 2. The limiting groove 221 is preferably a circular groove, and the shape of the limiting end 512 is consistent with the shape of the limiting groove 221 so that the two can rotate relative to each other.

[0061] To prevent gas leakage between the guide hole 33 and the push rod 51, in one embodiment, the reset mechanism 5 further includes a pressure plate 53 and a sealing ring 54. The sealing ring 54 is interference-fitted onto the rod main portion 511, and the sealing ring 54 is pressed tightly between the upper end face of the opening of the guide hole 33 and the pressure plate 53 to prevent gas leakage and ensure the safety and reliability of the gas valve. The lower end of the elastic member 52 presses against the pressure plate 53. Furthermore, the rod main portion 511 passes through the pressure plate 53 to improve the assembly stability and reliability of the reset mechanism 5.

[0062] In one embodiment, the upper end of the valve core 3 is provided with a receiving groove 34, and the bottom of the receiving groove 34 is provided with a guide hole 33. The sealing ring 54, the pressure plate 53, and the elastic element 52 are all disposed in the receiving groove 34, thereby improving the ease of setting the reset mechanism 5 and reducing the space occupied. The elastic element 52 is preferably a helical spring with a smaller bottom and a larger top, so as to avoid the upper end of the elastic element 52 being too large, which would require a large size of the limiting part, while ensuring that the elastic force of the elastic element 52 is sufficient.

[0063] To improve the ease of disassembly and assembly of the gas valve, in one embodiment, the valve body 1 includes a valve seat 11 and a valve cover 12. The valve seat 11 has a valve cavity, an air inlet channel communicating with the valve cavity, and an air outlet channel communicating with the valve cavity. The valve core 3 is rotatably installed in the valve cavity. The valve cover 12 is detachably installed on the upper end of the valve seat 11, and the valve cover 12 and the valve seat 11 together form an installation space, which communicates with the upper opening of the valve cavity. The reset mechanism 5 is installed in the installation space, and the valve stem 2 is rotatably installed on the valve cover 12. This arrangement facilitates the disassembly and assembly of the reset mechanism 5, the valve core 3, and the reset mechanism 5 by disassembling the valve cover 12 relative to the valve seat 11, thereby improving the ease of disassembly and assembly of the gas valve.

[0064] In one embodiment, the installation space includes a main installation cavity 14 and a side installation cavity 15. The upper end of the valve cavity is open and extends through the bottom of the main installation cavity 14. The driven gear 42 and the driving gear 41 are located in the main installation cavity 14. The transmission gear 43 is installed in the side installation cavity 14 via a mounting shaft 44. The upper end of the mounting shaft 44 is rotatably connected to the valve cover 12 and the lower end is rotatably connected to the valve seat 11. This arrangement allows the transmission gear 43 to be located on the side of the driven gear 42, which helps to reduce the size of the transmission gear 43 and improve the ease of installation. The side installation cavity 15 facilitates the installation, positioning, and limiting of the transmission gear 43 on the valve body 1. Furthermore, the two ends of the mounting shaft 44 are rotatably connected to the valve cover 12 and the valve seat 11, respectively, which effectively ensures the installation stability and reliability of the transmission gear 43.

[0065] In one embodiment, the transmission gear 43 includes a first gear portion 431 and a second gear portion 432 coaxially connected. The first gear portion 431 meshes with the driving gear 41, and the second gear portion 432 meshes with the driven gear 42. The second gear portion 432 has more teeth than the first gear portion 431, thereby facilitating an increase in the reduction ratio. In other embodiments, the transmission gear 43 is a single gear, with both the driving gear 41 and the transmission gear 43 meshing with it. The outer diameter of the driven gear 42 is larger than the outer diameter of the driving gear 41 to achieve speed reduction. This configuration requires the valve stem 2 and the valve core 3 to be relatively eccentrically positioned.

[0066] In one embodiment, at least two transmission gears 43 are spaced apart circumferentially along the driving gear 41 to ensure the force balance and stability of the driven gear 42 in the circumferential direction, thereby ensuring the rotational reliability of the valve core 3 and improving the overall reliability and service life of the gas valve. Preferably, two transmission gears 43 are arranged opposite each other to simplify the structure of the reduction mechanism 4, reduce costs, and improve structural compactness while ensuring force stability. Further, at least two side mounting cavities 15 are spaced apart around the main mounting cavity 14, and each side mounting cavity 15 corresponds to one transmission gear 43. In other embodiments, the number of transmission gears 43 can be one, three, or other numbers.

[0067] In other embodiments, the transmission gear 43 can be a gear ring structure, which is coaxially sleeved on the outside of the driving gear 41. The gear ring structure includes a first gear ring portion and a second gear ring portion with different inner diameters. The first gear ring portion meshes with the driving gear 41, and the second gear ring portion meshes with the driven gear 42.

[0068] To improve the ease of meshing between the driven gear 42 and the transmission gear 43, in one embodiment, the transmission gear 43 includes a mounting cylinder portion 421 and a gear ring portion 422 coaxially connected. The outer diameter of the gear ring portion 422 is larger than the outer diameter of the mounting cylinder portion 421. The mounting cylinder portion 421 is sleeved on the upper end of the valve core 3. This allows for increasing the outer diameter of the gear ring portion 422 while avoiding excessive size of the mounting cylinder portion 421. This facilitates meshing between the gear ring portion 422 and the second gear portion 432, while also increasing the number of teeth on the driven gear 42. This further increases the reduction ratio of the driven gear 42 relative to the driving gear 41, making it easier to achieve a reduction setting. It also reduces the overall weight of the transmission gear 43 and lowers the cost.

[0069] It is worth noting that the number of teeth of the driving gear 41 is N1, the number of teeth of the driven gear 42 is N2, the number of teeth of the first gear section 431 is N3, and the number of teeth of the second gear section 432 is N4. When (N1×N3) / (N2×N4)<1, deceleration is achieved.

[0070] In one embodiment, the valve body 1 has an upper mounting cavity 141 and a lower mounting cavity 142 separated by a partition plate 6. The driving gear 41 is mounted in the upper mounting cavity 141, and the driven gear 42 is mounted in the lower mounting cavity 142. The partition plate 6 prevents the driving gear 41 from being driven downward during the downward movement of the valve stem 2, thus avoiding collision with the driven gear 42 and improving the operational reliability and stability of the reduction mechanism 4. In other embodiments, the distance between the driving gear 41 and the driven gear 42 can also be controlled to prevent the driving gear 41 from contacting the driven gear 42 when the valve stem 2 is pressed down to the pressing position. The main mounting cavity 14 is divided into the upper mounting cavity 141 and the lower mounting cavity 142 by the partition plate 6.

[0071] In one embodiment, the partition plate 6 is sandwiched between the valve cover 12 and the valve seat 11. The partition plate 6 and the valve cover 12 form an upper mounting cavity 141, and the partition plate 6 and the valve seat 11 form a lower mounting cavity 142. The transmission gear 43 is located outside the drive gear 41 and passes through the partition plate 6. This arrangement simplifies the installation structure of the partition plate 6 and improves the stability and ease of installation of the partition plate 6. Specifically, the partition plate 6 has a clearance hole 61 for each transmission gear 43 to drive the transmission gear 43.

[0072] Furthermore, the valve cover 12 and the valve seat 11 are connected by fasteners 16 that pass vertically through both, and the fasteners 16 pass through the partition plate 6 to ensure that the partition plate 6 is pressed between the valve cover 12 and the valve seat 11, thus ensuring the stability and reliability of the three components. The fasteners 16 are located on the outside of the installation space to avoid structural interference between the fasteners 16 and the reset mechanism 5. Preferably, multiple fasteners 16 are spaced apart along the circumference of the valve cover 12 to ensure the assembly stability and reliability of the valve cover 12 and the valve seat 11.

[0073] To further improve the operational reliability of the reset mechanism 5, in one embodiment, the valve stem 2 includes a main stem body 21 and an end head 22 connected to the lower end of the main stem body 21. The end head 22 protrudes radially from the main stem body 21. The main stem body 21 rotatably passes through the valve body 1 and extends out of the valve body 1 at its upper end. The cross-section of the main stem body 21 is a non-circular cross-section. The drive gear 41 is sleeved on the main stem body 21, and the inner hole shape of the drive gear 41 is consistent with the cross-sectional shape of the main stem body 21 to restrict the rotation of the drive gear 41 relative to the main stem body 21. The drive gear 41 can slide vertically relative to the main stem body 21. This configuration ensures that the rotation of the valve stem 2 reliably drives the drive gear 41 to rotate, which in turn drives the driven gear 42 to rotate. The drive gear 41 can slide vertically relative to the main rod 21, so that the drive gear 41 can maintain a fixed vertical position under the meshing constraint with the driven gear 42. The lifting and lowering of the main rod 21 will not drive the lifting and lowering of the drive gear 41, thereby ensuring the meshing stability of the drive gear 41 and the transmission gear 43 and improving the operational reliability of the reduction mechanism 4.

[0074] In other embodiments, the driving gear 41 can be fixed vertically relative to the valve stem 2. Both the driving gear 41 and the first gear part 431 are spur gears, so that the driving gear 41 can slide vertically relative to the driven gear 42 while ensuring the meshing between the two.

[0075] The driven gear 42 is fixedly sleeved on the valve core 3 to ensure the coaxiality of the driven gear 42 and the valve core 3. In one embodiment, the upper outer wall of the valve core 3 has an external thread, and the inner wall of the inner ring of the driven gear 42 has an internal thread. The internal thread and the external thread are threaded together, that is, the driven gear 42 is screwed onto the valve core 3 to ensure the stability and reliability of the connection between the driven gear 42 and the valve core 3. In other embodiments, the driven gear 42 can be fastened to the valve core 3 with screws, or the driven gear 42 can be coaxially sleeved on the valve core 3 through interference fit or other installation methods.

[0076] In one embodiment, the upper end of the valve core 3 has a mounting portion 32 and a limiting step surface surrounding the outer side of the mounting portion 32, with the limiting step surface facing upwards. The driven gear 42 is screwed onto the outer side of the mounting portion 32, and its lower end abuts against the limiting step surface. By providing the limiting step surface, the depth of screwing of the driven gear 42 relative to the valve core 3 can be limited, thereby improving the assembly reliability and smoothness of the valve core 3 and the driven gear 42.

[0077] Specifically, the valve core 3 includes a main core body 31 and a mounting part 32 coaxially connected. The main core body 31 has a frustoconical structure that is smaller at the bottom and larger at the top. An adjustment chamber 311 is provided inside the main core body 31, and a vent hole is provided on the side wall of the main core body 31. The mounting part 32 is coaxially connected to the larger end of the main core body 31, and the outer diameter of the mounting part 32 is smaller than the outer diameter of the larger end of the main core body 31, so that the end face of the larger end of the main core body 31 forms a limiting step surface. The receiving groove 34 extends from the mounting part 32 to the main core body 31.

[0078] In one embodiment, the upper end of the driven gear 42 is higher than the upper end of the valve core 3, and the inner diameter of the driven gear 42 is larger than the outer diameter of the valve stem 2. The lower end of the valve stem 2 is movably inserted into the inner hole of the driven gear 42 and spaced apart from the driven gear 42. This can improve the compactness of the structure while avoiding interference between the structures.

[0079] like Figures 5 to 7 As shown, in one embodiment, the upper end of the valve body 1 has a mounting groove 121. The valve stem 2 can rotate and float vertically through the bottom of the mounting groove 121. An anti-rotation protrusion 122 protrudes from the groove wall of the mounting groove 121. A limiting plate 7 is connected to the valve stem 2. The limiting plate 7 rotates with the valve stem 2 and is located in the mounting groove 121. A limiting groove 711 is formed on the limiting plate 7. The distance between the anti-rotation protrusion 122 and the bottom of the mounting groove 121 is greater than the thickness of the limiting plate 7. When the gas valve is in the closed state, the valve stem 2 is in the initial position, and the anti-rotation protrusion 122 is engaged in the limiting groove 711. A rod mounting hole 126 is formed at the bottom of the mounting groove 121. The valve stem 2 rotates through the rod mounting hole 126.

[0080] When the gas valve is closed, the anti-rotation protrusion 122 is engaged in the limiting groove 711, preventing the valve stem 2 from being rotated directly, thus avoiding accidental activation and realizing the child lock function. At the same time, since the distance between the anti-rotation protrusion 122 and the bottom of the mounting groove 121 is greater than the thickness of the limiting plate 7, the valve stem 2 can be rotated by pressing down the valve stem 2, causing the anti-rotation protrusion 122 to disengage from the limiting groove 711, thereby enabling the valve stem 2 to be rotated and thus adjusting the firepower.

[0081] The above-mentioned design improves the safety of the gas valve and, by providing an anti-rotation protrusion 122 on the groove wall of the mounting groove 121, which cooperates with the limiting plate 7 on the valve stem 2 to achieve a child lock structure, the overall structure of the gas valve is highly compact. Specifically, the upper end of the valve cover 12 has the aforementioned mounting groove 121, and the lower end of the valve cover 12 has an upper groove. The partition plate 6 and the groove wall of the upper groove form an upper mounting cavity 141.

[0082] In one embodiment, the valve body 1 further includes an upper cover 13, which covers the upper end of the mounting groove 121 to close the upper opening of the mounting groove 121. The valve stem 2 can rotatably pass through the upper cover 13. The upper cover 13 prevents the limiting plate 7 and the inner structure of the mounting groove 121 from being exposed, thereby improving the safety of the gas valve. Specifically, the upper cover 13 covers the upper end of the valve cover 12 and is adapted to the outer contour of the upper end of the valve cover 12. The upper cover 13 and the valve body 1 are fastened together by fasteners 16 passing through the valve cover 12 and the valve seat 11.

[0083] To further improve the safety and reliability of the gas valve, in one embodiment, the limiting plate 7 includes a main body plate 71 sleeved on the valve stem 2. A stop portion 72 is partially provided radially protruding from the main body plate 71, and a limiting groove 711 is formed on the main body plate 71. A starting point limiting portion 124 protrudes from the groove wall of the mounting groove 121. When the valve stem 2 is in its initial position, the stop portion 72 is located between the anti-rotation protrusion 122 and the starting point limiting portion 124 and abuts against the starting point limiting portion 124, thereby restricting the valve stem 2 from rotating in a direction that moves the stop portion 72 away from the anti-rotation protrusion 122. This limits the position where the valve stem 2 rotates back to its original position when the gas valve is closed, ensuring the reliability of the initial position of the valve stem 2.

[0084] The starting point limiting part 124 preferably extends vertically from the bottom of the mounting groove 121 to the opening of the mounting groove 121 to reliably prevent the stop part 72 from going over the starting point limiting part 124.

[0085] In one embodiment, the groove wall of the mounting groove 121 is provided with an end-point limiting portion 125, which can abut against the stop portion 72 to limit the valve stem 2 from continuing to rotate in the direction of increasing firepower, that is, to limit the maximum angle of rotation of the valve stem 2 and ensure the operational reliability of the valve stem 2. Furthermore, the end-point limiting portion 125 extends from the bottom of the mounting groove 121 to the opening of the mounting groove 121 to prevent the stop portion 72 from exceeding the end-point limiting portion 125, ensuring the reliability and stability of the limiting position.

[0086] In one embodiment, a limiting ring portion 123 protrudes from the bottom of the mounting groove 121. The height of the limiting ring portion 123 protruding from the bottom of the mounting groove 121 is greater than the thickness of the main body plate portion 71. The limiting ring portion 123 extends circumferentially along the mounting groove 121 and its upper side can abut against the stop portion 72. The first end of the limiting ring portion 123 is spaced apart from the side of the anti-rotation protrusion 122 away from the starting point limiting portion 124. The second end of the limiting ring portion 123 extends in a direction away from the anti-rotation protrusion 122 to the ending point limiting portion 125. The limiting ring 123 is provided so that when the valve stem 2 is pressed and rotated until the stop 72 passes the anti-rotation protrusion 122, the stop 72 can abut against the first end of the limiting ring 123 to restrict the valve stem 2 from continuing to rotate in the pressed state. Then the user can release the stop 72 upward so that the stop 72 is located on the upper side of the limiting ring 123, thereby enabling the valve stem 2 to be rotated and adjusted even when it is not pressed down, and the pressing release position of the valve stem 2 can be positioned.

[0087] In one embodiment, the central angle between the starting point limiting portion 124 and the limiting ring portion 123 is 90° to better accommodate the user's adjustment operation. In other embodiments, the central angle between the first end of the starting point limiting portion 124 and the limiting ring portion 123 is 60° to 100°.

[0088] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0089] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas valve, comprising a valve body (1), a valve core (3) rotatably mounted inside the valve body (1), and a valve stem (2) rotatably mounted on the valve body (1), characterized in that, The gas valve also includes a deceleration mechanism (4), which is installed inside the valve body (1) and is connected to the valve stem (2) and the valve core (3). The rotation of the valve stem (2) can drive the valve core (3) to rotate relative to the valve stem (2) at a reduced speed through the deceleration mechanism (4).

2. The gas valve according to claim 1, characterized in that, The deceleration mechanism (4) includes a drive gear (41) coaxially sleeved on the valve stem (2), a driven gear (42) coaxially sleeved on the valve core (3), and a transmission gear (43) rotatably installed inside the valve body (1). The transmission gear (43) meshes with both the drive gear (41) and the driven gear (42). The drive gear (41) rotates with the valve stem (2), and the valve core (3) rotates with the driven gear (42).

3. The gas valve according to claim 2, characterized in that, The transmission gear (43) includes a first gear section (431) and a second gear section (432) arranged coaxially and side by side along the axial direction. The number of teeth of the first gear section (431) is less than the number of teeth of the second gear section (432). The first gear section (431) meshes with the driving gear (41), and the second gear section (432) meshes with the driven gear (42).

4. The gas valve according to claim 3, characterized in that, The transmission gear (43) is provided with at least two gears spaced circumferentially along the drive gear (41).

5. The gas valve according to claim 3, characterized in that, The driven gear (42) is sleeved on the outer side of the upper end of the valve core (3), and the upper end of the driven gear (42) is higher than the upper end of the valve core (3). The lower end of the valve stem (2) is inserted into the inner hole of the driven gear (42) and spaced apart from the driven gear (42).

6. The gas valve according to claim 3, characterized in that, The driven gear (42) includes a mounting cylinder (421) and a gear ring (422) coaxially mounted on the upper end of the mounting cylinder (421). The outer diameter of the gear ring (422) is larger than the outer diameter of the mounting cylinder (421). The gear ring (422) meshes with the second gear (432). The mounting cylinder (421) is sleeved on the valve core (3). And / or, the upper end of the valve core (3) has a mounting portion (32) and a limiting step surface arranged around the outside of the mounting portion (32), the limiting step surface is arranged facing upward, the driven gear (42) is screwed onto the outside of the mounting portion (32) and its lower end abuts against the limiting step surface.

7. The gas valve according to claim 2, characterized in that, The valve stem (2) can be vertically and floatingly mounted on the valve body (1). The valve body (1) has an upper mounting cavity (141) and a lower mounting cavity (142) separated by a partition plate (6). The driving gear (41) is mounted on the upper mounting cavity (141), and the driven gear (42) is mounted on the lower mounting cavity (142).

8. The gas valve according to claim 7, characterized in that, The valve body (1) includes a valve seat (11) and a valve cover (12) detachably mounted on the upper end of the valve seat (11). The partition plate (6) is sandwiched between the valve cover (12) and the valve seat (11). The partition plate (6) and the valve cover (12) surround to form the upper mounting cavity (141). The partition plate (6) and the valve seat (11) surround to form the lower mounting cavity (142). The transmission gear (43) is located outside the drive gear (41) and passes through the partition plate (6).

9. The gas valve according to claim 8, characterized in that, The valve stem (2) includes a main stem body (21) and an end head (22) connected to the lower end of the main stem body (21). The cross-section of the main stem body (21) is a non-circular cross-section. The inner hole shape of the drive gear (41) is the same as that of the main stem body (21). The main stem body (21) is slidably inserted into the inner hole of the drive gear (41) and passes through the partition plate (6). The partition plate (6) is located between the drive gear (41) and the end head (22).

10. The gas valve according to any one of claims 2-7, characterized in that, The valve body (1) includes a valve seat (11) and a valve cover (12) detachably mounted on the upper end of the valve seat (11). The valve stem (2) is rotatably mounted on the valve cover (12) and can float up and down relative to the valve cover (12). The valve core (3) is rotatably mounted on the valve seat (11). The valve seat (11) and the valve cover (12) enclose a side mounting cavity (15) that is connected to the main mounting cavity (14). The driving gear (41) and the driven gear (42) are both installed in the main mounting cavity (14). The transmission gear (43) is installed in the side mounting cavity (15) through the mounting shaft (44). The upper end of the mounting shaft (44) is rotatably connected to the valve cover (12) and the lower end is rotatably connected to the valve seat (11).

11. The gas valve according to any one of claims 1-9, characterized in that, The upper end of the valve body (1) is provided with an installation groove (121), and the groove wall of the installation groove (121) is provided with an anti-rotation protrusion (122). The valve stem (2) can rotate and float vertically through the bottom of the installation groove (121). A limiting plate (7) is connected to the valve stem (2). The limiting plate (7) is located in the mounting groove (121). The distance between the anti-rotation protrusion (122) and the bottom of the mounting groove (121) is greater than the thickness of the limiting plate (7). The limiting plate (7) has a limiting groove (711). When the valve stem (2) is in the initial position, the anti-rotation protrusion (122) is engaged in the limiting groove (711).

12. The gas valve according to claim 11, characterized in that, The limiting plate (7) includes a main plate (71) sleeved on the valve stem (2), and a stop (72) is provided in part of the main plate (71) protruding radially. The limiting groove (711) is provided on the main plate (71). The mounting groove (121) has a protruding starting point limiting part (124) on its groove wall. When the valve stem (2) is in the initial position, the stop part (72) is located between the starting point limiting part (124) and the anti-rotation protrusion (122) and abuts against the starting point limiting part (124); and / or, the mounting groove (121) has a protruding ending point limiting part (125) on its groove wall. The stop part (72) can abut against the ending point limiting part (125) to limit the maximum angle of rotation of the valve stem (2) relative to the initial position.

13. The gas valve according to claim 12, characterized in that, The bottom of the mounting groove (121) is provided with a limiting ring (123). The limiting ring (123) extends circumferentially along the mounting groove (121) and its upper side can abut against the stop (72). The first end of the limiting ring (123) is spaced apart on the side of the anti-rotation protrusion (122) away from the starting point limiting part (124). The second end of the limiting ring (123) extends in a direction away from the anti-rotation protrusion (122) to the ending point limiting part (125).

14. A gas stove, characterized in that, Including the gas valve as described in any one of claims 1-13.

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