Gas cock valve and gas appliance

Abstract

This utility model discloses a gas plug valve and a gas appliance, relating to the field of gas appliances. The gas plug valve includes a valve body, a valve stem, and a valve core. A valve cavity is formed on the valve body, and the valve core is rotatably disposed within the valve cavity. The valve stem extends into the valve cavity to drive the valve core to rotate. The gas plug valve rotates after the valve stem is pressed to achieve ignition. A stop plate is also provided inside the valve cavity, which is sleeved on the valve stem and rotates synchronously with it. A first limiting part and a second limiting part are also provided inside the valve cavity. The first limiting part limits the axial movement of the valve stem when it is pressed and limits its rotation when it rotates after axial displacement. The second limiting part is used to rotate and limit the stop plate. This utility model's gas plug valve features an optimized structural design, making the overall structure simpler.

Description

Technical Field

[0001] This utility model relates to the field of gas appliance technology, specifically to a gas rotary valve and a gas appliance. Background Technology

[0002] A gas rotary valve is a type of valve used to control the flow of gas, and is applied in applications such as household gas appliances, city gas distribution systems, and industrial sites. It mainly consists of a valve body, valve stem, and valve core. Ignition is achieved by operating the valve stem, and rotating the valve stem adjusts the area of ​​the orifice on the valve core that supplies gas, thus regulating the flame intensity. In addition, a position control disc is installed on the valve body, with positions corresponding to different flame intensity levels, providing guidance to the user during flame intensity switching.

[0003] The operation of the valve stem involves two stages. The first stage is ignition, where the valve stem is pressed to open the gas passage, followed by rotating the valve stem to trigger the ignition switch. After ignition, rotating the valve stem adjusts the flame intensity. Existing gas rotary valves have multiple limiting structures: one axial limiting structure and two circumferential limiting structures corresponding to the valve stem. The axial limiting structure axially limits the valve stem during ignition; one circumferential limiting structure circumferentially limits the valve stem during ignition; and the other circumferential limiting structure circumferentially limits the valve stem during flame intensity adjustment, or it could be a circumferential limiting structure for the valve core. Additionally, a limiting structure for the shift plate is needed to ensure it rotates synchronously with the valve stem.

[0004] Existing gas plug valves have multiple upper limit structures, resulting in a complex overall appearance. Furthermore, the lack of a protective structure for the position dial makes it susceptible to contamination from external moisture, oil, and other substances, affecting the position indication. Utility Model Content

[0005] This utility model aims to solve one of the technical problems in related technologies to a certain extent. To this end, this utility model provides a gas rotary valve with an optimized structural design that makes the overall structure simpler.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] This utility model discloses a gas plug valve, including a valve body, a valve stem, and a valve core. The valve body has a valve cavity formed thereon, and the valve core is rotatably disposed in the valve cavity. The valve stem extends into the valve cavity to drive the valve core to rotate. The gas plug valve rotates after the valve stem is pressed to achieve ignition. A stop plate is also provided in the valve cavity. The stop plate is sleeved on the valve stem and rotates synchronously with the valve stem. A first limiting part and a second limiting part are also provided in the valve cavity. The first limiting part limits the valve stem axially when the valve stem is pressed and limits the rotation of the valve stem when the valve stem rotates after axial displacement. The second limiting part is used to limit the rotation of the stop plate.

[0008] This utility model discloses a gas rotary valve comprising a valve stem, a valve core, and a position dial. The valve stem is a user-operated component, allowing the user to ignite, adjust the flame intensity, and shut off the gas. When the valve stem is pressed, it can move axially relative to the position dial, allowing gas to flow into the valve chamber. Rotating the valve stem causes the valve core to rotate synchronously, supplying gas for ignition. After ignition, the valve stem is released and returns to its initial height position. Further rotation of the valve stem adjusts the flow rate of gas supplied by the valve core, thus regulating the flame intensity. The position dial corresponds to different flame intensity levels, indicating to the user that the desired level has been adjusted. Reversing the valve stem resets the valve core, blocking the gas supply and shutting off the gas supply. The valve stem's reset also stops gas flow, preventing gas leakage.

[0009] The valve body is equipped with a first limiting part and a second limiting part. The first limiting part can limit the valve stem during ignition. The ignition action includes pressing the valve stem and rotating the valve stem in sequence. The first limiting part has both axial and rotational limiting functions for the valve stem. It can limit the valve stem after it is pressed to prevent excessive axial displacement of the valve stem and damage to the internal structure used to trigger gas conduction. After the valve stem rotates, it limits the valve stem to prevent further rotation, meeting the industry requirement of stopping rotation after ignition. The second limiting part has a rotational limiting function for the shift plate, which can limit the rotation angle of the shift plate. Since both the valve core and the shift plate rotate with the valve stem, the rotation angle of the shift plate is limited by the rotational limitation of the second limiting part. Similarly, the rotation angle of the valve core and the valve stem can be limited, so all three can share a single limiting structure.

[0010] The gear shift disc is housed within the valve cavity, isolating it from the outside environment. External pollutants such as moisture and fumes are prevented from entering the valve cavity and contaminating the gear shift disc, ensuring its shift indication function remains unaffected and guaranteeing a good user experience. Furthermore, the first and second limiting parts are integrated within the valve cavity, resulting in a cleaner and more aesthetically pleasing exterior for the valve body.

[0011] Optionally, the valve stem is provided with a lever for actuating the gear shift disc to drive its rotation, and the first limiting part limits the lever. The lever can rotate synchronously with the valve stem to push the gear shift disc, causing the gear shift disc sleeved on the valve stem to rotate. The first limiting part limits the lever, thereby subjecting the valve stem connected to the lever to a synchronous limiting effect. This eliminates the need for an additional limiting structure on the valve stem corresponding to the first limiting part, simplifying the valve stem structure.

[0012] Optionally, a first notch is provided on the gear shift disc along the axial direction of the valve stem, and the lever passes through the first notch. The first limiting part includes a first limiting groove. After the valve stem is compressed, the lever is axially displaced into the first limiting groove and stopped by the bottom wall of the first limiting groove. When the lever rotates with the valve stem, it is stopped by the side wall of the first limiting groove. When the lever rotates clockwise or counterclockwise with the valve stem, the lever can push the side wall of the first notch to drive the gear shift disc to rotate. Because the first notch is provided along the axial direction of the valve stem, during the ignition stage, when the valve stem is compressed and axially displaced, the gear shift disc will not obstruct the lever. At the same time, the lever remains within the first notch after axial displacement with the valve stem, and can drive the gear shift disc to rotate synchronously during subsequent rotation.

[0013] The first limiting groove has a bottom wall and side walls. When the gas rotary valve is closed or after ignition, the lever is located outside the first limiting groove, so the rotation of the valve stem is not restricted by the first limiting groove. When the gas rotary valve is in the ignition stage, after the valve stem is pressed and axially displaced, the lever moves axially relative to the first notch and can enter the first limiting groove. As its axial displacement distance increases, it is stopped by the bottom wall of the first limiting groove, limiting the valve stem's continued displacement and providing the user with feedback on pressing it into place. After rotating the valve stem, the lever rotates around the valve stem's axis in the first limiting groove and is stopped by the side wall of the first limiting groove, limiting the valve stem's continued rotation and providing the user with feedback on rotating it into place. After ignition is complete, releasing the pressure on the valve stem allows it to spring back, and the lever moves out of the first limiting groove, so that the first limiting groove does not affect the valve stem's continued rotation to adjust the flame intensity. In this way, the valve stem can be axially and circumferentially limited during the ignition stage by a first limiting groove.

[0014] Optionally, the inner wall of the valve cavity is recessed radially outward to form a first step, and the end face of the first step is recessed axially along the valve stem to form the first limiting groove. An elastic element is also provided within the valve cavity, which applies pressure to the stop plate to keep it abutting against the end face of the first step. The first limiting groove is directly formed from the inner wall of the valve cavity, eliminating the need for additional assembly parts, thus facilitating assembly and simplifying the overall structure. The first step naturally forms a radial end face that supports the stop plate within the valve cavity and cooperates with the elastic element to limit the axial displacement of the stop plate, eliminating the need for additional assembly parts within the valve cavity, further simplifying assembly and the overall structure.

[0015] Optionally, the gear shift disc is provided with a limiting member that rotates synchronously with it. A second limiting part stops the limiting member when the gear shift disc rotates to limit the rotation angle of the gear shift disc. The second limiting part is disposed on the rotation path of the limiting member. The limiting member can rotate synchronously with the gear shift disc to move closer to or further away from the second limiting part. When the limiting member contacts the second limiting part, it can be stopped by the second limiting part, thus limiting the continued rotation of the limiting member and achieving the purpose of limiting the gear shift disc. The limiting member can rotate clockwise or counterclockwise with the gear shift disc, and the rotation path of the limiting member remains unchanged. Since the second limiting part is disposed on the rotation path of the limiting member, the limiting member will eventually contact the limiting member and be stopped whether rotating clockwise or counterclockwise, thereby limiting the rotation angle of the gear shift disc, and also limiting the rotation angle of the valve stem and valve core.

[0016] Optionally, the inner wall of the valve cavity is recessed radially outward to form a second step. The second limiting portion includes a second limiting groove formed by the end face of the second step recessed along the axial direction of the valve stem. The limiting member is a protrusion extending from the stop plate into the second limiting groove. The protrusion is stopped by the side wall of the second limiting groove when rotating with the stop plate. The second limiting groove is directly formed from the inner wall of the valve cavity, eliminating the need for additional assembly parts, thus facilitating assembly and simplifying the overall structure. The second limiting groove is formed on the second step and is arranged along the rotation path of the protrusion. On the rotation path of the protrusion, the second limiting groove can naturally form two side walls that can stop the protrusion.

[0017] Optionally, the valve stem is equipped with a lever, which drives the gear shift plate and the valve core to rotate synchronously with the valve stem as the valve stem rotates. The valve stem can drive both the gear shift plate and the valve core to rotate simultaneously via a single lever, and both rotate synchronously with the valve stem. This ensures that the gear position indication on the gear shift plate is consistent with the valve core's adjustment of the firepower level, allowing the user to clearly understand the firepower status. Furthermore, separate components for driving the gear shift plate and valve core rotation are not required on the valve stem, simplifying its structure.

[0018] Optionally, the gear shift plate and the valve core are coaxially arranged. A first notch is provided on the gear shift plate along the axial direction of the valve stem, and a second notch is provided on the valve core along the axial direction of the valve stem. The lever passes through both the first and second notches. When the lever rotates with the valve stem, it can simultaneously push the sidewalls of the first and second notches, thereby simultaneously driving the gear shift plate and the valve core to rotate. The first and second notches, which are arranged along the axial direction of the valve stem, allow the lever to move axially with the valve stem during the ignition phase.

[0019] Optionally, the shift plate is fitted over the valve core, and the valve core is sealed against the inner wall of the valve cavity. The inner wall of the valve cavity is radially recessed outward to form a first step. The shift plate is supported on the end face of the first step. The shift plate has an axially protruding ring, which is radially positioned by the inner ring wall of the first step to maintain a distance between the inner ring of the shift plate and the valve core. The valve core is sealed against the inner wall of the valve cavity, preventing gas leakage through the gap between the valve core and the valve cavity during valve core rotation. The shift plate is axially supported on the first step, so it does not exert an axial force on the valve core. The protruding ring of the shift plate is radially positioned by the inner ring wall of the first step, thus limiting the radial displacement of the shift plate and maintaining a distance between the shift plate and the valve core to prevent the shift plate from exerting a radial force on the valve core. Therefore, the shift plate will not contact the valve core during rotation, allowing the valve core to maintain a sealed fit with the inner wall of the valve cavity, ensuring the safety of gas use.

[0020] This utility model also discloses a gas appliance that uses the aforementioned gas plug valve and possesses all the advantages of the aforementioned gas plug valve, which will not be repeated here.

[0021] These features and advantages of this utility model will be disclosed in detail in the following specific embodiments and accompanying drawings. The preferred embodiments or means of this utility model will be shown in detail in conjunction with the accompanying drawings, but are not intended to limit the technical solutions of this utility model. In addition, each of these features, elements and components appearing in the following text and drawings is multiple and is labeled with different symbols or numbers for convenience, but all represent parts with the same or similar structure or function. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings:

[0023] Figure 1 This is a schematic diagram of the gas rotary valve in this utility model.

[0024] Figure 2 This is an exploded view of the gas rotary valve in this utility model.

[0025] Figure 3This is a schematic diagram of the gas plug valve after the end cap has been removed in this utility model.

[0026] Figure 4 This is a top view of the gas plug valve after the end cap of this utility model has been removed.

[0027] Figure 5 for Figure 4 Sectional view at point AA.

[0028] Figure 6 This is a schematic diagram of the valve body in this utility model.

[0029] Figure 7 This is a schematic diagram of the gear shift plate in this utility model.

[0030] Figure 8 for Figure 6 Enlarged diagram of point A in the middle.

[0031] Figure 9 for Figure 4 Sectional view at point BB.

[0032] Figure label:

[0033] Valve body 100, valve chamber 110, end cap 120;

[0034] Valve stem 200, lever 210;

[0035] Valve core 300, through hole 310, second notch 320;

[0036] Micro switch 400;

[0037] Air outlet 500;

[0038] Gear shift plate 600, first notch 610, elastic element 620, convex ring 630, protrusion 640, groove 650, hard ball 660;

[0039] First limiting groove 700, first step 710, second step 720, second limiting groove 730. Detailed Implementation

[0040] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described are intended to explain this utility model and should not be construed as limiting it.

[0041] The terms "an embodiment," "example," or "trademark" used in this specification refer to a particular feature, structure, or characteristic described in connection with the embodiment itself that may be included in at least one embodiment disclosed in this utility model. The phrase "in an embodiment" appearing in various places throughout the specification does not necessarily refer to the same embodiment.

[0042] Reference Figures 1 to 9 This utility model discloses a gas plug valve, which is a valve used to control the flow of gas. It can control the on / off state and flow rate of gas to achieve control of the flame. The gas plug valve of this application includes a valve body 100, a valve stem 200, a valve core 300, a fork (a conventional feature in the art, not shown in this application), and a solenoid valve (a conventional feature in the art, not shown in this application). A valve cavity 110 is formed inside the valve body 100. The valve core 300 is rotatably disposed in the valve cavity 110. The valve stem 200 is disposed on the valve body 100 and extends into the valve cavity 110 to drive the valve core 300 to rotate. The valve stem 200 can trigger the solenoid valve to conduct gas through the fork. The valve stem 200 can also trigger the micro switch 400 on the valve body 100 to ignite the gas.

[0043] Specifically:

[0044] The gas plug valve can be ignited by operating the valve stem 200. The ignition operation is divided into two stages: the first stage is pressing the valve stem 200 and the second stage is rotating the valve stem 200.

[0045] The valve body 100 is provided with an exhaust passage 500 for supplying gas to external equipment. The exhaust passage 500 is connected to the valve cavity 110. A micro switch 400 is also provided on the valve body 100. The micro switch 400 is electrically connected to the igniter of the external equipment (generally to generate an electric spark to ignite the gas). When the micro switch 400 is triggered, the igniter can continuously generate an electric spark to ignite the gas ejected from the exhaust passage 500.

[0046] When the valve stem 200 is pressed, the valve stem 200 generates axial displacement and simultaneously pushes the shift fork. After being pushed, the shift fork can push the solenoid valve, so that the solenoid valve opens the gas passage in the valve body 100 to allow gas to enter the valve chamber 110. At the same time, the valve stem 200 can also trigger the micro switch 400 during the axial displacement.

[0047] The valve core 300 is cylindrical and has multiple through holes 310 spaced out circumferentially. The through holes 310 have different conduction areas. After the gas enters the valve cavity 110, it first enters the valve core 300 and then passes through the through holes 310 into the gas outlet channel 500. The different through holes 310 have different conduction areas, resulting in different gas flow rates. In the first stage of ignition, there are no through holes 310 on the valve core 300 corresponding to the gas outlet channel 500, so the gas is sealed in the valve core 300. After rotating the valve stem 200, the valve core 300 rotates with the valve stem 200 so that the through holes 310 can correspond to the gas outlet channel 500. At this time, the gas can pass through the through holes 310 into the gas outlet channel 500.

[0048] The valve body 100 is provided with an elastic reset structure corresponding to the valve stem 200 (existing technology, which will not be described in detail in this application). After ignition is completed, releasing the valve stem 200 will reset the valve stem 200 under the action of elastic force, and the micro switch 400 will be stopped from being triggered. Then, rotating the valve stem 200 will drive the valve core 300 to rotate, which will switch the gas supply through hole 310, thereby changing the gas flow rate in the gas outlet channel 500 and thus adjusting the flame intensity.

[0049] In this application, the valve body 100 is provided with two microswitches 400. One microswitch 400 is triggered during the ignition stage to activate the igniter and achieve ignition. The other microswitch 400 remains triggered after ignition and can activate other external devices, such as a range hood. The triggering method of the two microswitches 400 and the corresponding structure on the valve body 100 are prior art and will not be described in detail in this application.

[0050] When the flame is turned off, the valve stem 200 is reversed to return it to its initial position (axial and circumferential). The valve core 300 rotates and resets with the valve stem 200, disconnecting the through hole 310 from the gas outlet passage 500. The shift fork stops pushing the solenoid valve as the valve stem 200 resets. The solenoid valve can reset and close the gas passage inside the valve body 100, preventing gas leakage.

[0051] Typically, during ignition, the through hole 310 with the largest conduction area on the valve core 300 corresponds to the gas outlet channel 500, maximizing the gas flow rate. The larger gas flow rate can quickly form a sufficiently concentrated combustible mixture (gas and air), making the mixture easier to ignite. Even with slight airflow interference (such as natural wind in the kitchen), it can ensure stable flame ignition. In addition, the flame temperature is higher and the combustion range is wider in the high-fire state, which can quickly heat the ignition area and reduce the risk of leakage caused by incomplete combustion of gas in a short period of time.

[0052] To ensure successful ignition, a first limiting part is provided within the valve chamber 110. This first limiting part serves to both axially limit the valve stem 200 during the first stage of ignition and to rotate the valve stem 200 during the second stage of ignition. During the first stage of ignition, the first limiting part restricts the valve stem 200 after it is pressed, preventing excessive axial displacement that could damage the shift fork, solenoid valve, or other internal structures. This limiting also provides a tactile feedback to the user, indicating when the pressure is complete. During the second stage of ignition, the first limiting part restricts the valve stem 200 from further rotation after it has rotated to its designated position, ensuring that the gas flow rate in the outlet channel 500 is at its maximum. This guarantees stable ignition of the gas and ensures safety. Furthermore, the limiting also provides a tactile feedback to the user, indicating when the rotation is complete.

[0053] The first limiting part can only limit the rotation of the valve stem 200 after the valve stem 200 is compressed and axially displaced. Therefore, after ignition is completed, the valve stem 200 returns to its initial height, and the rotation of the valve stem 200 is not limited by the first limiting part, so that the valve stem 200 can continue to rotate to adjust the firepower.

[0054] To improve the user experience, a position dial 600 is also provided on the valve body 100. The position dial 600 serves as an indicator and corresponds to the firepower level, providing a prompt to the user when switching firepower levels, allowing the user to clearly understand the firepower status. The position dial 600 is fitted onto the valve stem 200 and rotates synchronously with the valve stem 200. The valve core 300 can also adjust the firepower as the valve stem 200 rotates. Therefore, when the valve stem 200 rotates, both the position dial 600 and the valve core 300 can rotate, allowing the position dial 600 to be matched with the firepower level.

[0055] In existing technologies, the gear shift disc is generally located outside the valve body and rests against it. Therefore, during use, the gear shift disc can be contaminated by external moisture, oil, and small particulate solids, affecting its function as a firepower shift indicator. In this application, the gear shift disc 600 is located inside the valve cavity 110, protecting it from external contaminants by the valve body 100. This provides the gear shift indicator with a longer-lasting effect.

[0056] The valve body 100 is also provided with a second limiting part, which is used to rotate the limiting plate 600 to limit the rotation angle of the plate 600. Since both the valve core 300 and the plate 600 rotate with the valve stem 200, the rotation angle of the plate 600 is limited by the rotation limit of the second limiting part. Similarly, the rotation angles of the valve core 300 and the valve stem 200 can also be limited, so that the three can share a single limiting structure.

[0057] Both the first and second limiting parts are located in the valve cavity 110, making the exterior of the valve body 100 more concise and aesthetically pleasing. The first and second limiting parts are also protected by the valve body 100, preventing them from being affected by external contaminants and ensuring their limiting function.

[0058] Reference Figure 3 Based on the above embodiments, in one embodiment of this utility model, the method by which the valve stem 200 drives the gear plate 600 and the valve core 300 is described.

[0059] The valve core 300 has a cylindrical structure, and the position plate 600 has a disc-shaped structure; both are encircled by the valve stem 200. To better match the firing position, the position plate 600 and valve core 300 can rotate synchronously with the valve stem 200. A radially extending lever 210 is provided on the valve stem 200; the lever 210 moves synchronously with the valve stem 200, actuating the valve core 300 and position plate 600 to drive them to rotate.

[0060] Preferably, the valve stem 200 has only one lever 210, which can simultaneously actuate the valve core 300 and the position plate 600. Specifically, the position plate 600 is fitted onto the outside of the valve core 300, and the position plate 600, valve core 300, and valve stem 200 are coaxially arranged. The valve stem 200 passes through the valve core 300 and contacts the position plate 600, thus allowing both the valve core 300 and the position plate 600 to be actuated simultaneously using only one lever 210. This eliminates the need for separate components on the valve stem 200 to drive the rotation of the position plate 600 and the valve core 300, simplifying the structure of the valve stem 200.

[0061] Specifically, a first notch 610 is provided on the gear shift plate 600 along the axial direction of the valve stem 200, and a second notch 320 is provided on the valve core 300 along the axial direction of the valve stem 200. The lever 210 can pass through the second notch 320 and the first notch 610 in sequence. When the lever 210 rotates forward or backward with the valve stem 200, the lever 210 can push the side walls of the first notch 610 and the second notch 320 to drive the gear shift plate 600 and the valve core 300 to rotate. Since the first notch 610 and the second notch 320 are provided along the axial direction of the valve stem 200, the gear shift plate 600 and the valve core 300 will not obstruct the lever 210 from axially displacing with the valve stem 200 in the first stage of ignition. At the same time, after the lever 210 is axially displaced with the valve stem 200, it is still located within the first notch 610 and the second notch 320, and can drive the gear shift plate 600 and the valve core 300 to rotate synchronously in the second stage of ignition.

[0062] Reference Figures 4 to 6 , Figure 8 Based on the above embodiments, the structure of the first limiting part is specifically described in one embodiment of this utility model.

[0063] Preferably, the first limiting part limits the lever 210, thereby causing the valve stem 200 connected to the lever 210 to be subject to a synchronous limiting effect. In this way, it is not necessary to provide an additional limiting structure on the valve stem 200 corresponding to the first limiting part, thus simplifying the structure of the valve stem 200.

[0064] The first limiting part includes a first limiting groove 700. After the valve stem 200 is pressed, the lever 210 is axially displaced into the first limiting groove 700 and stopped by the bottom wall of the first limiting groove 700. When the lever 210 rotates with the valve stem 200, it is stopped by the side wall of the first limiting groove 700.

[0065] The first limiting groove 700 has a bottom wall and a side wall. When the gas rotary valve is closed or after ignition, the lever 210 is located outside the first limiting groove 700, so the rotation of the valve stem 200 is not restricted by the first limiting groove 700. When in the first stage of ignition, the lever 210 enters the first limiting groove 700 with the axial displacement of the valve stem 200, and is stopped by the bottom wall of the first limiting groove 700 as the axial displacement distance increases, limiting the valve stem 200 from continuing to move and providing the user with operation feedback of pressing into place. When in the second stage of ignition, the lever 210 rotates around the axis of the valve stem 200 in the first limiting groove 700 with the valve stem 200 and is stopped by the side wall of the first limiting groove 700, limiting the valve stem 200 from continuing to rotate, and providing the user with operation feedback of rotating into place. After ignition is complete, release the pressure on the valve stem 200 so that it can spring back, and the lever 210 moves out of the first limiting groove 700, releasing the first limiting groove 700 from limiting the valve stem 200. The valve stem 200 can then continue to rotate to adjust the flame intensity.

[0066] The above scheme allows for axial and circumferential limiting of the valve stem 200 during the ignition stage via a first limiting groove 700.

[0067] Preferably, the inner wall of the valve cavity 110 is recessed radially outward to form a first step 710, and the end face of the first step 710 is recessed axially along the valve stem 200 to form a first limiting groove 700. The first limiting groove 700 is directly formed from the inner wall of the valve cavity 110, eliminating the need for additional assembly parts, thus facilitating assembly and simplifying the overall structure.

[0068] To facilitate the insertion of the gear shift plate 600 into the valve cavity 110, the inner wall of the upper part of the valve cavity 110 is recessed radially outward and connected to the outer peripheral edge of the end face of the first step 710, so that the opening size of the upper part of the valve cavity 110 is not less than the outer diameter of the gear shift plate 600.

[0069] Alternatively, another approach can be adopted: the inner wall of the valve cavity protrudes radially inward to form a U-shaped protrusion, which can form a first limiting groove, which is also directly formed from the inner wall of the valve cavity.

[0070] Reference Figures 4 to 6 , Figure 8 and Figure 9 Based on the above embodiments, in one embodiment of the present invention, the first step 710 is arranged along the circumferential direction, and the thickness of the first step 710 in the radial direction is greater than the depth of the first limiting groove 700 in the radial direction, so that the first step 710 can naturally form a continuous end face in the radial direction, the inner diameter of the end face is smaller than the outer diameter of the stop plate 600, so that the stop plate 600 can be supported on the first step 710.

[0071] Reference Figure 2 and Figure 9 The valve body 100 also includes an end cap 120, and an elastic element 620 is provided in the valve cavity 110. The elastic element 620 is a spring. The spring is compressed between the stop plate 600 and the end cap 120. Under the action of the elastic force, the stop plate 600 can remain against the first step 710, so that the axial displacement of the stop plate 600 is restricted.

[0072] Thus, the first step 710 can not only limit the valve stem 200 during the ignition stage, but also be used to assemble the gear plate 600, so that there is no need to set up additional parts for assembling the gear plate 600 in the valve cavity 110, which facilitates assembly and simplifies the overall structure.

[0073] Reference Figure 5 , Figure 7 and Figure 9 Based on the above embodiments, in one embodiment of this utility model, the valve body 100 is further provided with a limiting structure for radially positioning the stop plate 600, for keeping the stop plate 600 coaxial with the valve stem 200. The first step 710 can form an inner ring wall, and the stop plate 600 is provided with an axially protruding convex ring 630, which is radially positioned by the inner ring wall of the first step 710.

[0074] Typically, the valve stem 200 is required to rotate 90° during the ignition phase. Therefore, the central angle corresponding to the first limiting groove 700 is about 90°, and the corresponding central angle of the inner ring wall is about 270°. Although the first limiting groove 700 causes the inner ring wall to be discontinuous, the central angle corresponding to the inner ring wall is large enough (more than 180° is sufficient) to enable the inner ring wall to radially position the stop plate 600.

[0075] Reference Figures 4 to 9 Based on the above embodiments, the structure of the second limiting part is described in one embodiment of the present invention.

[0076] The gear shift plate 600 is provided with a limiting member that rotates synchronously with it. The second limiting part stops the limiting member when the gear shift plate 600 rotates to limit the rotation angle of the gear shift plate 600. The second limiting part is provided on the rotation path of the limiting member.

[0077] The limiting member can rotate synchronously with the gear shift plate 600 to move closer to or further away from the second limiting part. When the limiting member contacts the second limiting part, it can be stopped by the second limiting part to limit the continued rotation of the limiting member, thereby achieving the purpose of limiting the gear shift plate 600.

[0078] The limiting member can rotate forward or backward with the gear plate 600. The rotation path of the limiting member remains unchanged. The second limiting part is set on the rotation path of the limiting member. Therefore, whether the limiting member rotates forward or backward, it can eventually contact the limiting member and be stopped, thereby limiting the rotation angle of the gear plate 600, and also limiting the rotation angle of the valve stem 200 and the valve core 300.

[0079] Specifically: the inner wall of the valve cavity 110 is recessed radially outward to form a second step 720. The inner diameter of the first step 710 is larger than the inner diameter of the second step 720. The second limiting part includes a second limiting groove 730 formed by the end face of the second step 720 recessed along the axial direction of the valve stem 200. The limiting member is a protrusion 640 extending from the convex ring 630 into the second limiting groove 730. The second limiting groove 730 is directly formed from the inner wall of the valve cavity 110, without the need for additional assembly parts, so as to facilitate assembly and simplify the overall structure. The second limiting groove 730 is formed on the second step 720 and is set along the rotation path of the protrusion 640. On the rotation path of the protrusion 640, the second limiting groove 730 can naturally form two side walls that can stop the protrusion 640.

[0080] In addition, the second limiting part can also be a structure formed on the inner ring wall of the first step and protruding inward.

[0081] To ensure that the movement of the gear shift disc 600 within the valve chamber 110 does not affect the airtightness of the valve body 100, refer to... Figure 3 , Figure 5 , Figure 8 and Figure 9 Based on the above embodiments, in one embodiment of this utility model, the valve core 300 is sealed and fitted to the inner wall of the valve cavity 110, and the inner diameter of the stop plate 600 is larger than the outer diameter of the valve core 300.

[0082] The valve core 300 is sealed to the inner wall of the valve cavity 110, preventing gas from leaking through the gap between the valve core 300 and the valve cavity 110 during rotation. The shift plate 600 is axially positioned by the end face of the first step 710 and the elastic element 620, and simultaneously radially positioned by the first step 710, maintaining a distance between the inner ring of the shift plate 600 and the valve core 300 (e.g., ...). Figure 3As shown in the figure, it is clear that there is a gap between the two. Therefore, the gear plate 600 will not contact the valve core 300, but will apply axial and radial forces to the valve core 300. The valve core 300 can maintain a sealed fit with the inner wall of the valve cavity 110, ensuring the safety of gas use.

[0083] like Figure 5 and Figure 9 As shown, the valve core 300 is shaped like a frustum from top to bottom, and the inner wall of the valve cavity 110 is also shaped like a frustum from the lower end of the second step 720 downwards. The sealing performance between the valve core 300 and the valve cavity 110 is improved by the conical surface fit.

[0084] Reference Figure 3 and Figure 9 Based on the above embodiments, in one embodiment of this utility model, the valve cavity 110 is further provided with a positioning member that is elastically loaded. The positioning member abuts against the gear plate 600. The gear plate 600 is provided with multiple gears on the path through which the positioning member passes, which dampen the relative movement of the positioning member and the gear plate 600.

[0085] The positioning element can maintain contact with the gear shift disk 600 under the action of elastic force. The gear shift disk 600 is provided with multiple gears. The gears can rotate synchronously with the rotation of the gear shift disk 600. As the gear shift disk 600 rotates, the gears will pass through the positioning element and generate damping when they come into contact, which hinders the relative movement of the positioning element and the gear shift disk 600. This serves as a prompt for the user to switch the firepower gear. The user can easily feel the sudden damping force during the rotation of the valve stem 200.

[0086] The gear position is a groove 650 extending radially along the gear position disc 600. The positioning element is a rigid ball 660, the radius of which is greater than the depth of the groove 650. The positioning element is pushed by an axially positioned spring and contacts the gear position disc 600. The positioning element can be engaged in the groove 650, thus hindering the rotation of the gear position disc 600. When shifting gears, the gear position disc 600 can push the rigid ball 660, causing the rigid ball 660 to push against the spring and disengage from the groove 650. After the gear position disc 600 rotates, it engages in another groove 650. During operation, the user can feel the tactile and audible feedback of the rigid ball 660 engaging in the groove 650, receiving a gear shift indication.

[0087] The sidewall of the groove 650 and the end face of the stop plate 600 are smoothly transitioned by an arc or slope, making it easy for the hard ball 660 to leave the groove 650.

[0088] The end cap is also equipped with a threaded adjustment component, with the spring located between the rigid ball 660 and the adjustment component (which can be installed from...). Figure 3 and Figure 9As can be seen from the diagram, rotating the adjusting component allows for axial displacement of the adjusting component to adjust the compression of the spring, thereby adjusting the elastic force acting on the hard sphere 660.

[0089] The rigid ball 660, spring, and adjusting component are all located between the end cover and the stop plate 600. However, due to the limited axial space within the valve cavity 110, a large thickness cannot be achieved after installing the rigid ball 660, spring, and adjusting component. To ensure that the lever 210 remains within the first notch 610, local areas on both sides of the stop plate 600 located at the first notch 610 protrude towards the end cover (from...). Figure 7 As can be seen, this is to increase the axial dimension of the first notch 610.

[0090] This utility model also discloses a gas appliance that uses the aforementioned gas plug valve and possesses all the advantages of the aforementioned gas plug valve, which will not be repeated here.

[0091] The above are merely specific embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Those skilled in the art should understand that this utility model includes, but is not limited to, the contents described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of this utility model will be included within the scope of the claims.

Claims

1. A gas plug valve, comprising a valve body (100), a valve stem (200), and a valve core (300), wherein a valve cavity (110) is formed on the valve body (100), the valve core (300) is rotatably disposed in the valve cavity (110), the valve stem (200) extends into the valve cavity (110) to drive the valve core (300) to rotate, and the gas plug valve rotates after the valve stem (200) is pressed to achieve ignition, characterized in that, The valve cavity (110) is also provided with a stop plate (600), which is sleeved on the valve stem (200) and rotates synchronously with the valve stem (200). The valve cavity (110) is also provided with a first limiting part and a second limiting part. The first limiting part limits the valve stem (200) axially when the valve stem (200) is pressed, and limits the rotation of the valve stem (200) when the valve stem (200) rotates after axial displacement. The second limiting part is used to limit the rotation of the stop plate (600).

2. The gas rotary valve according to claim 1, characterized in that, The valve stem (200) is provided with a lever (210) for moving the gear plate (600) to drive the gear plate (600) to rotate, and the first limiting part limits the lever (210).

3. The gas rotary valve according to claim 2, characterized in that, The gear plate (600) has a first notch (610) along the axial direction of the valve stem (200). The lever (210) passes through the first notch (610). The first limiting part includes a first limiting groove (700). After the valve stem (200) is pressed, the lever (210) is axially displaced into the first limiting groove (700) and stopped by the bottom wall of the first limiting groove (700). When the lever (210) rotates with the valve stem (200), it is stopped by the side wall of the first limiting groove (700).

4. The gas rotary valve according to claim 3, characterized in that, The inner wall of the valve cavity (110) is recessed radially outward to form a first step (710). The end face of the first step (710) is recessed along the axial direction of the valve stem (200) to form a first limiting groove (700). An elastic element (620) is also provided in the valve cavity (110). The elastic element (620) applies pressure to the stop plate (600) so that it abuts against the end face of the first step (710).

5. The gas rotary valve according to claim 1 or 4, characterized in that, The gear shift plate (600) is provided with a limiting member that rotates synchronously with it. The second limiting part stops the limiting member when the gear shift plate (600) rotates to limit the rotation angle of the gear shift plate (600). The second limiting part is disposed on the rotation path of the limiting member.

6. The gas rotary valve according to claim 5, characterized in that, The inner wall of the valve cavity (110) is recessed radially outward to form a second step (720). The second limiting part includes a second limiting groove (730) formed by the end face of the second step (720) recessed along the axial direction of the valve stem (200). The limiting member is a protrusion (640) extending from the stop plate (600) into the second limiting groove (730). The protrusion (640) is stopped by the side wall of the second limiting groove (730) when it rotates with the stop plate (600).

7. The gas rotary valve according to claim 1, characterized in that, The valve stem (200) is provided with a lever (210), which drives the gear plate (600) and the valve core (300) to rotate synchronously with the valve stem (200) as the valve stem (200) rotates.

8. The gas rotary valve according to claim 7, characterized in that, The gear shift plate (600) and the valve core (300) are coaxially arranged. A first notch (610) is provided on the gear shift plate (600) along the axial direction of the valve stem (200), and a second notch (320) is provided on the valve core (300) along the axial direction of the valve stem (200). The lever (210) passes through both the first notch (610) and the second notch (320).

9. The gas rotary valve according to claim 8, characterized in that, The stop plate (600) is sleeved on the outside of the valve core (300). The valve core (300) is sealed and fitted to the inner wall of the valve cavity (110). The inner wall of the valve cavity (110) is recessed radially outward to form a first step (710). The stop plate (600) is supported on the end face of the first step (710). The stop plate (600) is provided with an axially protruding convex ring (630). The convex ring (630) is radially positioned by the inner ring wall of the first step (710) so that the inner ring of the stop plate (600) and the valve core (300) maintain a distance.

10. A gas appliance, characterized in that, The gas rotary valve includes any one of claims 1 to 9.

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