Gas cock valve and gas appliance

Abstract

The utility model discloses a kind of gas plug valves and gas appliances, it is related to gas appliance field, gas plug valve includes valve body and the end cap of lid on valve body, end cap is equipped with the valve stem of being inserted into valve body, valve body is rotatably equipped with the valve core of control gas on-off, valve stem is used to drive valve core rotation to adjust the on-off of gas, or the flow of gas changes firepower gear position, end cap is equipped with the protective sleeve for the radial positioning valve stem along the axial direction of valve stem, the part of valve stem in protective sleeve is fixedly installed first prompt part, end cap is equipped with second prompt part, second prompt part when switching firepower gear position, the relative movement of second prompt part generates damping to prompt the switching of firepower gear position.The utility model's gas plug valve, optimize structure, make whole more simple and convenient to assemble.

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, the valve body is equipped with a flame level indicator to provide guidance to the user during flame level switching.

[0003] The existing gas rotary valve has an overly complex structure. The position indicator is located outside the valve body, and a corresponding installation limit structure for the position indicator also needs to be installed on the valve body. Furthermore, a structure that links with the position indicator is also required on the valve stem. Utility Model Content

[0004] The present invention provides a gas rotary valve with an optimized structure, making the overall design simpler and easier to assemble.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A gas rotary valve includes a valve body and an end cap that covers the valve body. A valve stem extending into the valve body is provided through the end cap. A valve core for controlling the on / off of gas is rotatably provided on the valve body. The valve stem is used to drive the valve core to rotate to adjust the on / off of gas or change the gas flow rate to change the fire level. A protective sleeve for radially positioning the valve stem is provided on the end cap along the axial direction of the valve stem. A first indicator part is fixedly installed on the portion of the valve stem located inside the protective sleeve. A second indicator part is provided on the end cap. When the fire level is switched, the relative movement of the second indicator part is damped to indicate the switch of the fire level.

[0007] The gas plug valve disclosed in this application includes a valve body, a valve stem, and a valve core. The valve stem is the component operated by the user to perform ignition, flame adjustment, and flameout operations. The valve core is rotated by the valve stem, which allows gas to be supplied externally after rotation. By adjusting the rotation angle of the valve core by the valve stem, the flow rate of the supplied gas can be adjusted, thereby changing the flame intensity and providing multiple flame levels for external gas appliances. The valve body has open sections for assembling various parts, such as the valve core. An end cap covers the open sections of the valve body, which not only shields the internal components but also provides a certain degree of protection, preventing external contaminants from affecting the airtightness of the plug valve and the smooth movement of the internal components. An axial protective sleeve is provided on the end cap to radially position the valve stem, ensuring that the valve stem's axis does not deviate during user operation, ensuring that ignition, flame adjustment, and flameout operations are not affected. This simplifies the overall structure of the plug valve by eliminating the need for a radial limiting structure for the valve stem on the outside of the protective sleeve. The first indicator is mounted on the valve stem and rotates with it, while the second indicator is mounted on the end cap and remains fixed (axially and circumferentially immobile). Therefore, when the valve stem is rotated to adjust the firing level, relative movement occurs between the first and second indicator. The second indicator dampens the relative movement of the first indicator, which is then applied to the valve stem and fed back to the user, improving the user experience. The damping effect of the second indicator on the first indicator occurs when switching firing levels. Damping also occurs when the valve stem continues to rotate after switching firing levels. In actual use, it's impossible to rotate the valve stem precisely to complete the firing level switch; usually, a slightly larger rotation is required. This damping is also perceived by the user. Therefore, the user experiences two instances of damping during operation: the first at the start of firing level switching and the second after the switch is complete, allowing the user to easily determine when the firing level switch is finished.

[0008] Unlike existing technologies where the gear position indicator structure is located on the end cap, in this application, the first indicator part is located on the part of the valve stem inside the protective sleeve, so that the first indicator part can be protected by the protective sleeve and avoid external pollutants from contaminating it and affecting its gear shift indicator effect.

[0009] It should be noted that the first indicator part mentioned in the above solution is fixedly mounted on the valve stem, meaning that the first indicator part can move with the movement of the valve stem, and the relative positions of the two in the axial and circumferential directions will not change. Since the first indicator part can move with the valve stem, it is unnecessary to set axial and circumferential limiting structures for the first indicator part as in existing technologies, thereby simplifying the overall structure of the plug valve and optimizing costs.

[0010] Optionally, the second indicator part abuts against the first indicator part, and one of the second and first indicator parts is elastically loaded to dampen the relative movement of the second and first indicator parts when rotating the valve stem to switch the firing level and after the firing level switch is completed. Under the action of the elastic force, the second and first indicator parts can remain in an abutting state, and the elastic force can also hinder their relative movement, so that the user can feel the elastic damping force transmitted to the valve stem to hinder the rotation of the valve stem when switching the firing level and after switching the firing level, thus sensing the switching of the firing level.

[0011] Optionally, the first prompting part includes multiple corresponding firepower levels formed circumferentially on the valve stem. The second prompting part includes a positioning member, which is subjected to a radial elastic force and abuts against one of the positions. During firepower adjustment, the positioning member overcomes the elastic force and switches to the position it abuts against. The first prompting part can switch the position cooperating with the positioning member as the valve stem rotates, and the valve stem also adjusts the valve core by rotating to adjust the firepower level, so that the position prompting function of the first prompting part can match the firepower changes. The elastic force on the positioning member is radial, so that the positioning member tends to move towards the valve stem axis under the elastic force, ensuring that the positioning member can remain abutting against the valve stem. The position of the positioning member on the end cap remains unchanged. As the valve stem rotates, the first prompting part can adjust the position of all the positions accordingly, changing the position corresponding to the positioning member. During this process, the positioning member needs to overcome the elastic force to allow the position change. During the operation of the valve stem, the user can clearly perceive the position change based on the operating feel.

[0012] Optionally, the stop is a groove formed on the side of the valve stem and extending axially. The positioning element is a hard ball that engages in the groove. When adjusting the heat level, the positioning element overcomes the elastic force to leave the current groove and engage in another groove. When rotating the valve stem to adjust the heat level, the hard ball acts as a stop against the side wall of the groove to hinder the rotation of the valve stem. Because the outer circumference of the hard ball is spherical, increasing the force applied to the valve stem results in a radial component of the force exerted by the side wall of the groove on the hard ball. This allows the hard ball to overcome the elastic force and exit the groove, sliding along the side of the valve stem between two adjacent grooves, and engaging in another groove under the action of the elastic force. Therefore, the user can perceive two damping forces during operation: one is the force applied to move the hard ball out of the groove, and the other is the hard ball re-engaging in the groove to prevent the valve stem from continuing to rotate. In addition, the valve stem not only rotates during operation, but also moves axially. For example, when igniting, the valve stem needs to be pressed to trigger the gas conduction. The groove extending axially can maintain its engagement with the hard ball during the axial displacement of the valve stem, so that the gear position indication function remains effective.

[0013] Optionally, the end cap is further provided with a threaded hole communicating with the protective sleeve. The positioning member is disposed in the threaded hole, and an adjusting member and an elastic member compressed between the adjusting member and the positioning member are threadedly engaged in the threaded hole. After the adjusting member rotates, it generates axial displacement to adjust the elastic force exerted by the elastic member on the positioning member. The threaded hole has a positioning function for the positioning member, which can prevent the positioning member from shifting and disengaging from the valve stem. When the threaded adjusting member rotates, it can convert the rotational motion into its own axial displacement to reduce or increase the distance between itself and the positioning member, thereby changing the amount of compression of the elastic member and thus changing the magnitude of the elastic force on the positioning member.

[0014] Optionally, the second indication part includes a plurality of axially extending grooves formed at intervals along the circumference of the valve stem on the inner wall of the protective sleeve. The valve stem has radially arranged holes. The first indication part includes a hard ball disposed in one of the holes and elastically loaded and engaged in one of the grooves. During the adjustment of the firepower, the hard ball overcomes the elastic force to leave the current groove and engage in another groove. Under the action of elastic force, the hard ball can abut against the inner wall of the protective sleeve. As the valve stem rotates, the hard ball can also slide along the inner wall of the protective sleeve in the hole. The hole has a positioning function for the hard ball, causing the hard ball to have a tendency to move radially outward under the action of elastic force. When the valve stem is rotated to adjust the firing power, the sidewall of the groove acts as a stop against the hard ball, hindering the rotation of the valve stem. Because the outer circumference of the hard ball is spherical, when the force applied to the valve stem is increased, the reaction force exerted by the sidewall of the groove on the hard ball has a radial component. This allows the hard ball to overcome the elastic force, retract into its hole, and exit the groove. It then slides along the inner wall of the protective sleeve and, under the action of elastic force, gets into another groove. When the valve stem moves axially, the axially extending groove allows the hard ball to maintain its fit while moving axially with the valve stem, ensuring the position indication function remains effective.

[0015] Optionally, the end cap is further provided with a micro ignition switch extending into the protective sleeve, and the valve stem is further provided with a trigger portion axially spaced from the first indication portion. During the ignition of the gas rotary valve, the trigger portion acts on the micro ignition switch as the valve stem moves axially. The micro ignition switch is a switch used to trigger an external ignition device to ignite the gas. The trigger portion is located on the valve stem and can move axially with the valve stem, approaching and triggering the micro ignition switch during axial movement. The micro ignition switch extends into the protective sleeve and can be triggered by the trigger portion. The triggered part of the micro ignition switch is protected by the protective sleeve, preventing accidental external triggering of the micro ignition switch. During the process of the trigger portion triggering the micro ignition switch with the axial displacement of the valve stem, the hard ball slides axially along the groove, and the two can maintain cooperation; the axially spaced trigger portion and the first indication portion will not interfere with each other, allowing the gear position indication function and the ignition function to operate normally.

[0016] Optionally, the end cap has a limiting boss on the side facing the valve body, and the part of the valve stem that extends into the valve body has a limiting rod that rotates synchronously with the valve stem. The limiting boss stops the limiting rod to limit the rotation angle of the valve stem. As the valve stem rotates, the limiting rod can move closer to or further away from the limiting boss. After contacting the limiting boss, it can be stopped by the limiting boss to limit further rotation, thus stopping the valve stem from rotating. The limiting boss has two sides on its circumference, so both forward and reverse rotation of the valve stem will be stopped by the limiting boss, thereby limiting the rotation angle of the valve stem for user convenience.

[0017] Optionally, the end cap has an annular protrusion along the circumference of the valve stem on the side facing the valve body. The limiting rod rotates along the end face of the annular protrusion with the valve stem. The annular protrusion has a notch. When the gas plug valve is in the closed state, the limiting rod engages with the notch to lock the valve stem. The limiting protrusion extends from one side of the annular protrusion of the notch. The two sidewalls of the notch can stop the limiting rod to restrict the forward and reverse rotation of the valve stem, keeping the gas plug valve in the closed state to prevent gas leakage. When ignition is required, pressing the valve stem can disengage the limiting rod from the notch and engage the notch to lock the rotation of the valve stem. When turning off the ignition, reversing the valve stem will stop the limiting rod to reverse into place, and the limiting rod will then engage with the notch along the sidewall of the limiting protrusion to lock the valve stem.

[0018] This utility model also discloses a gas appliance that uses the gas plug valve disclosed above and has all the beneficial effects of the gas plug valve, which will not be repeated here.

[0019] 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

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the gas rotary valve in this utility model.

[0022] Figure 2 This is an exploded view of the gas rotary valve in this utility model.

[0023] Figure 3This is an exploded view of the structure of the end cap portion of this utility model.

[0024] Figure 4 This is a top view of the structure of the end cap portion of this utility model.

[0025] Figure 5 for Figure 4 Sectional view at point AA.

[0026] Figure 6 for Figure 4 Sectional view at point BB.

[0027] Figure 7 This is a schematic diagram of the structure of the first prompting part and the positioning member in another embodiment of the present invention.

[0028] Figure 8 This is a schematic diagram of the bottom structure of the end cap of this utility model.

[0029] Figure 9 This is a schematic diagram of the structure of the end cap of this utility model.

[0030] Figure label:

[0031] Valve body 100, valve chamber 110;

[0032] Valve stem 200, limit rod 210, triggering part 220, and clearance part 230;

[0033] Valve core 300, through hole 310;

[0034] End cap 400, protective sleeve 410, limiting boss 420, annular boss 430, notch 440, opening 450;

[0035] Micro ignition switch 500, contact 510;

[0036] Groove 600, hard sphere 610, threaded hole 620, adjusting element 630, elastic element 640. Detailed Implementation

[0037] 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.

[0038] 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.

[0039] 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). An end cap 400 is covered on the valve body 100, and 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 is disposed on the end cap 400 and extends into the valve cavity 110 of the valve body 100 to drive the valve core 300 to rotate. A micro ignition switch 500 is also installed on the end cap 400. The valve stem 200 can trigger the solenoid valve to conduct gas through the fork, and the valve stem 200 can also trigger the micro ignition switch 500 on the valve body 100 to ignite the gas.

[0040] Specifically:

[0041] 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.

[0042] The valve body 100 is provided with an exhaust channel (a conventional feature in the art) for supplying gas to external devices. The exhaust channel is connected to the valve chamber 110. The micro ignition switch 500 is electrically connected to the igniter of the external device (generally to generate an electric spark to ignite the gas). When the micro ignition switch 500 is triggered, the igniter can continuously generate an electric spark to ignite the gas ejected from the exhaust channel.

[0043] 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 ignition switch 500 during the axial displacement.

[0044] 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 chamber 110, it first enters the valve core 300 and then passes through the through holes 310 into the gas outlet channel. 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, 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. At this time, the gas can pass through the through holes 310 into the gas outlet channel.

[0045] 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 allow the valve stem 200 to reset under the action of elastic force, and the micro ignition switch 500 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 and thus adjusting the flame intensity.

[0046] When the flame is turned off, the valve stem 200 is reversed to return it to its initial position. The valve core 300 rotates and resets with the valve stem 200, disconnecting the through hole 310 from the gas outlet passage. 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.

[0047] Since ignition, flame adjustment, and flameout are all achieved by operating the valve stem 200, the valve stem 200 can be linked with multiple structures to achieve the above functions through different operations. A protective sleeve 410 for radially positioning the valve stem 200 is provided on the end cap 400 along the axial direction of the valve stem 200. The valve stem 200 passes through the protective sleeve 410 and extends into the valve cavity 110. Under the radial positioning effect of the protective sleeve 410, the valve stem 200's axis remains unchanged during user operation, ensuring that ignition, flame adjustment, and flameout operations are not affected. Therefore, there is no need to set a radial limiting structure for the valve stem 200 outside the protective sleeve 410, simplifying the overall structure of the plug valve.

[0048] The valve core 300 is open on the side facing the end cover 400 for mounting the valve core 300 and other parts. The end cover 400 covers the valve body 100 and the valve cavity 110. In addition to shielding the components inside the valve cavity 110, it also provides a certain degree of protection, preventing external pollutants from affecting the airtightness of the plug valve and the smoothness of the movement of the internal components.

[0049] The gas rotary valve is also equipped with a first indicator section and a second indicator section that cooperates with the first indicator section. The first and second indicator sections can provide users with shift prompts when adjusting the firepower level, improving the user experience. The damping of the second indicator section on the first indicator section is generated when switching the firepower level. When the valve stem 200 is still rotating after switching the firepower level, damping is also generated. In actual use, it is not possible to rotate the valve stem 200 exactly to complete the firepower level switch. Usually, it is rotated by a slightly larger angle. At this time, the damping is also perceived by the user. Therefore, the user will perceive damping twice during operation: the first time when switching the firepower level, and the second time when the firepower level switch is completed, which helps the user judge when the firepower switch is completed.

[0050] Unlike existing technologies where the gear position indicator structure is located on the end cover 400, in this application, the first indicator part is located on the portion of the valve stem 200 within the protective sleeve 410. This allows the first indicator part to be protected by the protective sleeve 410, preventing external contaminants from affecting its gear shift indicator effect. The first indicator part is fixedly mounted on the valve stem 200 and can move with the valve stem 200. The relative positions of the two parts in the axial and circumferential directions do not change. This eliminates the need for axial and circumferential limiting structures for the first indicator part, as is common in existing technologies, thus simplifying the overall structure of the plug valve and optimizing costs.

[0051] like Figure 5 , Figure 7 As shown, based on the above embodiments, in one embodiment of this utility model, a firepower level switching prompt mechanism is specifically described.

[0052] The second indicator part abuts against the first indicator part, and one of the second indicator part and the first indicator part is elastically loaded to dampen the relative movement of the second indicator part and the first indicator part when the valve stem 200 rotates to switch the fire level and after the fire level switch is completed.

[0053] Under the action of elastic force, the second indicator part and the first indicator part can be kept in a resisting state. The second indicator part is set on the end cover 400 and is fixed with the end cover 400 (not moving in the axial and circumferential directions). The first indicator part rotates with the valve stem 200, so that the first indicator part and the second indicator part have relative movement in the circumferential direction. The elastic force can resist the relative movement between the two, so that the user can feel the elastic damping force that resists the rotation of the valve stem 200 when switching gears and after switching gears, and thus perceive the switching of the fire gear.

[0054] Reference Figure 5 Based on the above embodiments, in one embodiment of this utility model, the structure of the first prompting part and the second prompting part is specifically described.

[0055] The first prompting part includes a plurality of positions corresponding to the firepower level formed circumferentially on the valve stem 200. The second prompting part includes a positioning member, which is pressed against one of the positions by an elastic force in the radial direction, and switches to the position it is pressed against during the adjustment of the firepower, overcoming the elastic force.

[0056] The first indicator section can rotate with the valve stem 200 to switch the position that cooperates with the positioning component. The valve stem 200 also adjusts the valve core 300 by rotating to adjust the firepower level, so that the level indication function can match the firepower changes. The level is directly formed by the valve stem 200, which simplifies the structure and assembly process.

[0057] The elastic force acting on the positioning element is radial, causing it to tend to move towards the axis of the valve stem 200, ensuring it remains against the valve stem 200. The position of the positioning element on the end cover 400 remains unchanged. As the valve stem 200 rotates, all the gear positions adjust accordingly, changing the gear corresponding to the positioning element. During this process, the positioning element needs to overcome the elastic force to allow the gear position change. The user can clearly perceive the gear position change through tactile feedback while operating the valve stem 200.

[0058] Specifically: the stop is a groove 600 formed on the side of the valve stem 200 and extending axially, and the positioning element is a hard ball 610 that is inserted into the groove 600. When adjusting the fire intensity, the positioning element overcomes the elastic force to leave the current groove 600 and is inserted into another groove 600.

[0059] When the valve stem 200 is rotated to adjust the heat output, the rigid ball 610 acts as a stop against the side wall of the groove 600 to prevent the valve stem 200 from rotating. Because the outer circumference of the rigid ball 610 is spherical, increasing the force applied to the valve stem 200 causes the force exerted by the side wall of the groove 600 on the rigid ball 610 to have a radial component. This allows the rigid ball 610 to overcome the elastic force and exit the groove 600, sliding along the side of the valve stem 200 between two adjacent grooves 600, and then locking into another groove 600 under the action of the elastic force. Therefore, the user can feel two damping forces during operation: one is the force applied to move the rigid ball 610 out of the groove 600, and the other is the rigid ball 610 re-locking into the groove 600 to prevent the valve stem 200 from continuing to rotate. In addition, when the rigid ball 610 re-locks into the groove 600, the user can also feel the vibration generated by the rigid ball 610 being locked into the groove 600.

[0060] The radial depth and circumferential width of the groove 600 are smaller than the radius and diameter of the rigid ball 610, respectively, to avoid excessive obstruction force exerted by the groove 600 on the rigid ball 610, which could affect user operation. The sidewall of the groove 600 and the side of the valve stem 200 can transition through an arc surface or a slope, so that the rigid ball 610 can slide along the arc surface and exit the groove 600.

[0061] In addition, the valve stem 200 not only rotates during operation, but also moves axially. For example, during the ignition stage, axial displacement is required to trigger the gas conduction. The groove 600 extending axially can maintain its engagement with the hard ball 610 during the axial displacement of the valve stem 200, so that the gear position indication function remains effective.

[0062] Reference Figure 5 and Figure 9Based on the above embodiments, in one embodiment of this utility model, the end cap 400 is further provided with a threaded hole 620 communicating with the protective sleeve 410. The threaded hole 620 is arranged radially along the valve stem 200. The hard ball 610 is disposed in the threaded hole 620. The second prompting part also includes an adjusting member 630 and an elastic member 640. The adjusting member 630 and the elastic member 640 are disposed in the threaded hole 620. The adjusting member 630 is threadedly engaged with the threaded hole 620. The elastic member 640 is compressed between the adjusting member 630 and the hard ball 610. After the adjusting member 630 rotates, it generates axial displacement to adjust the elastic force of the elastic member 640 acting on the hard ball 610.

[0063] The threaded hole 620 positions the rigid ball 610. A portion of the rigid ball 610 protrudes from the threaded hole 620 and engages with the groove 600, preventing the rigid ball 610 from shifting (i.e., disengaging from the threaded hole 620) and disengaging from the valve stem 200. The threaded adjusting member 630, when rotated, converts its rotational motion into axial displacement, thereby reducing or increasing the distance between itself and the rigid ball 610. This alters the compression of the elastic member 640, changing the magnitude of the elastic force on the rigid ball 610, thus adjusting the damping force for smoother gear shifting.

[0064] Preferably, to improve the simplicity and aesthetics of the end cap 400, the threaded hole 620 is located on the upper surface of the end cap 400 on the side of the protective sleeve 410, eliminating the need for a protruding strip structure on the side wall of the protective sleeve 410. Furthermore, the upper surface of the end cap 400 has a recessed portion corresponding to the threaded hole 620, extending from the edge to the threaded hole 620. This prevents the portion containing the threaded hole 620 from protruding excessively from the end face of the end cap 400. Additionally, since the hard ball 610 needs to engage with the groove 600, to ensure that the hard ball 610 and the groove 600 maintain their engagement after the valve stem 200 moves axially, the position of the groove 600 on the valve stem 200 is affected by the position of the hard ball 610. The closer the hard ball 610 is to the bottom of the protective sleeve 410, the smaller the height of the protective sleeve 410 can be (the height of the protective sleeve ≥ the axial displacement distance of the valve stem during ignition + the distance between the center of the hard ball and the bottom of the protective sleeve).

[0065] The elastic element 640 is preferably a spring.

[0066] Alternatively, the positioning element can be a columnar structure with a spherical end that can fit into the groove, achieving the same technical effect.

[0067] like Figure 7As shown, unlike the above embodiments, in another embodiment of this utility model, the second prompting part includes a plurality of axially extending grooves 600 formed circumferentially on the inner wall of the protective sleeve 410 along the valve stem 200. The valve stem 200 is provided with radially arranged holes. The first prompting part includes a hard ball 610 disposed in the hole and elastically loaded and inserted into one of the grooves 600. During the adjustment of the firepower, the hard ball 610 overcomes the elastic force to leave the current groove 600 and insert into another groove 600.

[0068] Under the action of elastic force, the hard ball 610 can abut against the inner wall of the protective sleeve 410. As the valve stem 200 rotates, the hard ball 610 can also slide along the inner wall of the protective sleeve 410 in the hole. The hole has a positioning function for the hard ball 610, so that the hard ball 610 has a tendency to move radially outward under the action of elastic force.

[0069] When the valve stem 200 is rotated to adjust the fire intensity, the side wall of the groove 600 acts as a stop to the hard ball 610 to prevent the rotation of the valve stem 200. Since the outer circumferential surface of the hard ball 610 is spherical, after increasing the force applied to the valve stem 200, the reaction force of the side wall of the groove 600 acting on the hard ball 610 has a radial component, which allows the hard ball 610 to overcome the elastic force, retract into the hole and exit the groove 600, and slide along the inner wall of the protective sleeve 410 and be stuck into another groove 600 under the action of elastic force.

[0070] When the valve stem 200 moves axially, the axially extending groove 600 allows the hard ball 610 to remain in contact with the valve stem 200 while it moves axially, thus keeping the gear position indication function effective.

[0071] Reference Figure 5 , Figure 6 and Figure 8 Based on the above embodiments, in one embodiment of the present invention, a limiting boss 420 is provided on the side of the end cap 400 facing the valve body 100, and a limiting rod 210 is provided on the part of the valve stem 200 that extends into the valve body 100 and rotates synchronously with the valve stem 200. The limiting boss 420 stops the limiting rod 210 to limit the rotation angle of the valve stem 200.

[0072] As the valve stem 200 rotates, the limiting rod 210 can approach or move away from the limiting boss 420. After contacting the limiting boss 420, it can be stopped by the limiting boss 420 and its rotation is restricted, thus stopping the valve stem 200 from rotating. The limiting boss 420 has two sides on its circumference, so both the forward and reverse rotation of the valve stem 200 will be stopped by the limiting boss 420, thereby limiting the rotation angle of the valve stem 200 for user convenience.

[0073] In addition to requiring circumferential limits to restrict the rotation angle of the valve stem 200, the valve stem 200 also needs to have limits to restrict its rotation when the gas plug valve is closed. (Refer to...) Figure 5 , Figure 6 and Figure 8 Based on the above embodiments, in one embodiment of this utility model, an annular boss 430 is provided on the side of the end cap 400 facing the valve body 100. The annular boss 430 is arranged along the circumference of the valve stem 200. A notch 440 is provided on the annular boss 430. When the gas plug valve is in the closed state, the limiting rod 210 is inserted into the notch 440. The two side walls of the notch 440 can stop the limiting rod 210 to limit the forward and reverse rotation of the valve stem 200, and keep the gas plug valve in the closed state to prevent gas leakage.

[0074] The gas rotary valve is equipped with an elastic structure adapted to the valve stem 200. The elastic structure has an axial elastic force acting on the valve stem 200, so that the valve stem 200 can rebound after being pressed and released. During the ignition stage, the valve stem 200 can move axially after being pressed and exit the notch 440. After rotation, it triggers the micro ignition switch 500 to ignite. At this time, the pressure on the valve stem 200 is released, allowing the valve stem 200 to rebound under the action of the elastic force. The limiting rod 210 can abut against the annular boss 430 and can slide along the upper end face of the annular boss 430 with the valve stem 200.

[0075] The limiting boss 420 protrudes from the annular boss 430, and one side of the notch 440 is axially connected to one side of the limiting boss 420. When the gas plug valve needs to be turned off, the valve stem 200 is reversed, and the limiting boss 420 can stop the limiting rod 210 to reverse into place, and the limiting rod 210 is thus inserted into the notch 440 along the side wall of the limiting boss 420 to lock the valve stem 200.

[0076] Reference Figure 3 , Figure 5 , Figure 6 and Figure 9 Based on the above embodiments, in one embodiment of this utility model, the protective sleeve 410 is provided with a radially penetrating opening 450, the micro ignition switch 500 has a contact 510, the contact 510 extends into the protective sleeve 410 through the opening 450, and the valve stem 200 is also provided with a trigger part 220 axially spaced from the first indication part. During the ignition process of the gas rotary valve, the trigger part 220 acts on the contact 510 by mechanical compression during the axial movement with the valve stem 200 to trigger the micro ignition switch 500.

[0077] The trigger part 220 is disposed on the valve stem 200 and can move axially with the valve stem 200. During the axial movement, it approaches the contact 510 and triggers the micro ignition switch 500. During the axial movement of the valve stem 200, the hard ball 610 can slide axially relative to the groove 600 and the two can maintain a fit. The trigger part 220 and the first indication part will not interfere with each other due to the axial distance, so that the ignition function and the gear indication function can operate normally without affecting each other.

[0078] Because the hard ball 610 is located close to the lower end of the protective sleeve 410, and the micro ignition switch 500 is installed on the upper surface of the end cover 400, the position of the contact 510 is higher than that of the hard ball 610. Correspondingly, the position of the trigger part 220 on the valve stem 200 is higher than that of the first indication part. In order to prevent the contact 510 from being accidentally triggered when the ignition is off or after the valve stem 200 has completed the ignition reset, a clearance part 230 is also provided between the trigger part 220 and the first indication part on the valve stem 200. The clearance part 230 can maintain a distance from the contact 510 when the ignition is off or after ignition, so as to prevent the micro ignition switch 500 from being accidentally triggered during the adjustment of the firepower.

[0079] Specifically, the trigger section 220 is a large-diameter section, and the clearance section 230 is a small-diameter section. The diameter of the large-diameter section is larger than that of the small-diameter section, and the two are smoothly transitioned by a slope or curved surface, allowing the contact 510 to gradually contact the large-diameter section along the transition surface between them. Because the diameter of the large-diameter section is larger, it can get closer to the inner wall of the protective sleeve 410 to compress the contact 510; because the diameter of the small-diameter section is smaller, it maintains a larger distance from the inner wall of the protective sleeve 410 to accommodate the contact 510. The trigger section 220 and the clearance section 230 can be directly formed from the valve stem 200, which facilitates processing and assembly.

[0080] A positioning structure is also provided on the end cap 400 corresponding to the micro ignition switch 500, so that the position of the micro ignition switch 500 will not shift laterally and the position of the contact 510 remains unchanged. The valve stem 200 is also able to ensure that the avoidance part 230 will not squeeze the contact 510 due to the radial positioning of the protective sleeve 410, and the triggering part 220 can squeeze the contact 510 to trigger the micro ignition switch 500, thus ensuring that the micro ignition switch 500 can operate normally.

[0081] This utility model embodiment also discloses a gas appliance, which adopts the gas plug valve disclosed in the above embodiment and has all the technical effects of the gas plug valve, which will not be described in detail here.

[0082] 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 rotary valve, comprising a valve body (100) and an end cap (400) covering the valve body (100), wherein a valve stem (200) is provided through the end cap (400) and extends into the valve body (100), and a valve core (300) is provided on the valve body (100) for controlling the on / off of gas, wherein the valve stem (200) is used to drive the valve core (300) to rotate to adjust the on / off of gas or change the fire level by adjusting the gas flow rate, characterized in that, The end cap (400) is provided with a protective sleeve (410) for radially positioning the valve stem (200) along the axial direction of the valve stem (200). A first prompting part is fixedly installed on the part of the valve stem (200) located inside the protective sleeve (410). The end cap (400) is provided with a second prompting part. When switching the fire level, the second prompting part dampens the relative movement of the second prompting part to indicate the switching of the fire level.

2. The gas rotary valve according to claim 1, characterized in that, The second prompting part abuts against the first prompting part, and one of the second prompting part and the first prompting part is elastically loaded to dampen the relative movement of the second prompting part and the first prompting part when rotating the valve stem (200) to switch the fire level and after the fire level switch is completed.

3. The gas rotary valve according to claim 2, characterized in that, The first prompting part includes a plurality of positions corresponding to the firepower level formed circumferentially on the valve stem (200) along the valve stem (200). The second prompting part includes a positioning member, which is subjected to an elastic force in the radial direction and abuts against one of the positions, and switches to the position it abuts against in the process of adjusting the firepower, overcoming the elastic force.

4. The gas rotary valve according to claim 3, characterized in that, The stop is a groove (600) formed on the side of the valve stem (200) and extending axially. The positioning element is a hard ball (610) that is inserted into the groove (600). When adjusting the fire intensity, the positioning element overcomes the elastic force to leave the current groove (600) and is inserted into another groove (600).

5. The gas rotary valve according to claim 3, characterized in that, The end cap (400) is also provided with a threaded hole (620) communicating with the protective sleeve (410). The positioning member is provided in the threaded hole (620). An adjusting member (630) and an elastic member (640) compressed between the adjusting member (630) and the positioning member are provided in the threaded hole (620). After the adjusting member (630) rotates, it generates an axial displacement to adjust the elastic force of the elastic member (640) acting on the positioning member.

6. The gas rotary valve according to claim 2, characterized in that, The second prompting part includes a plurality of axially extending grooves (600) formed circumferentially on the inner wall of the protective sleeve (410) along the valve stem (200). The valve stem (200) is provided with radially arranged holes. The first prompting part includes a hard ball (610) disposed in the holes and elastically loaded and inserted into one of the grooves (600). During the adjustment of the firepower, the hard ball (610) overcomes the elastic force to leave the current groove (600) and insert into another groove (600).

7. The gas rotary valve according to claim 4 or 6, characterized in that, The end cap (400) is also provided with a micro ignition switch (500) extending into the protective sleeve (410), and the valve stem (200) is also provided with a trigger part (220) axially spaced from the first indication part. During the ignition process of the gas rotary valve, the trigger part (220) acts on the contact (510) of the micro ignition switch (500) as it moves axially with the valve stem (200).

8. The gas rotary valve according to any one of claims 1 to 6, characterized in that, The end cap (400) has a limiting boss (420) on one side facing the valve body (100). The valve stem (200) has a limiting rod (210) that rotates synchronously with the valve stem (200) at the part that extends into the valve body (100). The limiting boss (420) stops the limiting rod (210) to limit the rotation angle of the valve stem (200).

9. The gas rotary valve according to claim 8, characterized in that, The end cap (400) has an annular boss (430) on the side facing the valve body (100) along the circumference of the valve stem (200). The limiting rod (210) rotates with the valve stem (200) along the end face of the annular boss (430). The annular boss (430) has a notch (440). When the gas rotary valve is in the closed state, the limiting rod (210) is engaged in the notch (440) to lock the valve stem (200). The limiting boss (420) extends from the annular boss (430) on one side of the notch (440).

10. A gas appliance, characterized in that, Includes the gas rotary valve as described in any one of claims 1 to 9.

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