Three-channel plug valve

Abstract

The utility model discloses a three-channel plug valve, and belongs to the technical field of plug valves of gas stoves. The flow adjusting structure comprises a valve body and a flow adjusting device, wherein the valve body is provided with valve body air outlet channels (A, B, C and E); the surface of the valve element is provided with valve element grooves (A, B, C, D and E) which are communicated with one another, and along with rotation of the valve element, the communication area of the valve element grooves located on the same bus and the air outlet channel of the valve body changes. The gear shifting structure comprises a support provided with a gear groove; and the gear wheel is provided with an elastic piece, and the elastic piece is switched among the different gear grooves along with rotation of the gear wheel. The plug valve is provided with the flow adjusting structure and / or the gear shifting structure. The flow adjusting structure can achieve the purpose of synchronous opening and closing of the three gas outlet channels and can also change the gas flow of the three gas outlet channels, and independent or combined fire adjustment of the gas stove is achieved. And the elastic sheet is elastically matched with the gear groove, so that each gear has obvious damping feeling.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas stove cock valves, and in particular relates to a three-channel cock valve. Background Art

[0002] As a type of valve widely used in civil gas equipment, the main function of the plug valve is to control the switch and supply of gas source through manual operation, thereby adjusting the fire. This type of valve usually contains a rotatable valve core (or plug), which is provided with a hole groove connected to the inner cavity of the gas pipeline. When the valve core rotates, the hole groove forms a different alignment state with the opening or channel of the gas pipeline, thereby changing the flow path and flow of the gas, and realizing the control of the size of the fire.

[0003] The existing three-channel stopcock valves are usually designed for three-ring fire of gas cookers, that is, they have three independent fire outlets (rings), and each ring corresponds to a gas supply channel. The user rotates the gear controller (such as a knob) on the gas cooker to rotate the valve core to different angles, thereby changing the degree of connection between the three channels and the valve core hole grooves, so as to achieve independent or joint adjustment of the fire power of the three rings.

[0004] However, the existing three-channel stopcock may have the following deficiencies in meeting the diversity of users' demands for three-ring fire gear changes during cooking:

[0005] 1. Limited number of gears: Traditional three-channel stopcocks may only provide limited fire gear settings, such as high, medium, low and off. For situations that require more delicate heat control during cooking, such as slow cooking, low-temperature baking, precise frying, etc., these fixed gear settings may not meet the user's needs for fine-tuning the gas flow;

[0006] 2. Inflexible firepower distribution: Existing plug valves may not be able to achieve independent and precise firepower distribution for three rings. For example, users may want to adjust the firepower of only one ring without affecting other rings, or require a specific combination of rings (such as high fire on the outer ring and low fire on the inner ring) to suit specific pots or cooking techniques. Existing valve structures and control mechanisms may not provide such flexibility.

[0007] 3. Insufficient operating feel and feedback: The design of some plug valves may not fully consider the optimization of operating feel, which makes it difficult for users to accurately perceive the current firepower setting or whether the gear is in place when switching gears. Especially during continuous adjustment, there is a lack of clear resistance changes or "stuck" feeling, which affects user experience and operational accuracy.

[0008] In view of the above problems, users may feel that the existing three-channel stopcock has limitations in terms of the diversity, accuracy, and ease of operation of fire power adjustment during the actual cooking process, and it is difficult to meet the increasingly sophisticated cooking needs. Utility Model Content

[0009] The utility model aims at the above problems existing in the prior art and proposes a three-channel plug valve which provides more firepower gear selections, more flexible firepower distribution mode, better operating feel and feedback mechanism.

[0010] The utility model can be realized through the following technical solutions:

[0011] A three-channel plug valve, comprising:

[0012] The valve body has a valve body air outlet channel A, a valve body air outlet channel B, a valve body air outlet channel C, and a valve body air inlet channel E;

[0013] The valve core is rotatably mounted in the valve body, and the surface of the valve core is provided with valve core grooves A, B, C, D and E which are interconnected, wherein:

[0014] The valve core groove E and the valve body air inlet channel E are on the same busbar and are used to control the entry of gas;

[0015] The valve core groove A and the valve body air outlet channel A, the valve core groove B and the valve body air outlet channel B, the valve core groove C and the valve core groove D and the valve body air outlet channel C are respectively on the same generatrix;

[0016] As the valve core rotates, the connection area between the valve core groove and the valve body gas outlet channel on the same busbar changes, and the gas flow rate of each channel is controlled according to the connection angle, sequence and duration.

[0017] As a further improvement of the present invention, when the valve core is at the 0° position, the valve body air inlet passage E and the valve core groove E form a sealing angle to prevent the gas from entering.

[0018] As a further improvement of the present invention, during the rotation of the valve core in the front gear position, the valve body air inlet channel E is not connected to the valve core groove E, and the valve core groove A and the valve body air outlet channel A, the valve core groove B and the valve body air outlet channel B, and the valve core groove C and the valve body air outlet channel C are pre-connected.

[0019] As a further improvement of the present invention, when the valve body air inlet channel E is connected to the valve core groove E, the valve body air outlet channel A, the valve body air outlet channel B, and the valve body air outlet channel C discharge air at the same time.

[0020] As a further improvement of the present utility model, in the first rotation stroke of the valve core in the rear gear position:

[0021] The connection area between the valve body air outlet channel B and the valve core groove B gradually decreases;

[0022] The connection area between the valve body air outlet channel A and the valve core groove A remains unchanged or gradually decreases;

[0023] The connection area between the valve body air outlet channel C and the valve core groove C remains unchanged or gradually decreases.

[0024] As a further improvement of the present invention, in the second rotation stroke of the valve core in the rear gear position:

[0025] The connection area between the valve body air outlet channel B and the valve core groove B gradually decreases until it is 0;

[0026] The connection area between the valve body air outlet channel A and the valve core groove A remains unchanged or gradually decreases;

[0027] The connection area between the valve body air outlet channel C and the valve core groove C remains unchanged.

[0028] As a further improvement of the present invention, in the third rotation stroke of the valve core in the rear gear position:

[0029] The connection area between the valve body air outlet channel B and the valve core groove B is maintained at 0;

[0030] The connection area between the valve body air outlet channel A and the valve core groove A gradually decreases until it is 0;

[0031] The connection area between the valve body air outlet channel C and the valve core groove C gradually decreases until it is 0, and at the same time, the connection area between the valve body air outlet channel C and the valve core groove D gradually increases until the two are fully connected.

[0032] As a further improvement of the utility model, it also includes:

[0033] A bracket having a receiving cavity, wherein a gear slot is provided in the receiving cavity of the bracket;

[0034] A gear wheel is rotatably arranged in the accommodating cavity, and the gear wheel has an elastic sheet. As the gear wheel rotates, the elastic sheet switches between different gear slots.

[0035] As a further improvement of the present invention, the gear wheel is integrally formed by a main body and the elastic sheet, a single-point connection structure is formed between one end of the elastic sheet and the main body to make the elastic sheet elastic, and the elastic sheet has an elastic protrusion protruding outward, and during the rotation of the gear wheel, the elastic protrusion switches between different gear slots.

[0036] As a further improvement of the utility model, it also includes:

[0037] A valve stem structure is installed on the valve body and connected to the valve core, wherein the bracket is installed on the valve stem structure, and the valve stem of the valve stem structure passes through the bracket and the gear wheel, and the gear wheel and the valve core are driven to rotate by the rotation of the valve stem.

[0038] Compared with the prior art, the utility model has the following beneficial effects:

[0039] 1. The three-channel flow regulation structure can achieve the purpose of synchronous on / off of the three gas outlet channels, ensuring the consistency and safety of gas supply;

[0040] 2. By adjusting the rotation angle of the valve core, the gas flow of the three outlet channels can be changed separately or jointly, so as to achieve independent or joint firepower adjustment of the three-ring fire of the gas stove. Users can choose different firepower gears according to cooking needs to meet the requirements of refined cooking;

[0041] 3. The elastic sheet on the gear wheel and the gear slot opened in the bracket cooperate elastically, so that each gear has obvious damping feedback, realizing the gear feel effect when the user adjusts the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a cross-sectional view of the three-channel plug valve of the utility model;

[0043] Figure 2 It is a schematic diagram of the structure of the valve core of the utility model and a schematic diagram of the structure after the gear wheel and the gear groove of the bracket are assembled;

[0044] Figure 3 It is a cross-sectional view of each air outlet channel when the valve core and the valve body of the utility model are in the 0° gear state;

[0045] Figure 4 It is a cross-sectional view of each air outlet channel when the valve core and the valve body of the utility model are in a 35° gear state;

[0046] Figure 5 It is a cross-sectional view of each air outlet channel when the valve core and the valve body of the utility model are in a 90° gear state;

[0047] Figure 6It is a cross-sectional view of each air outlet channel when the valve core and the valve body of the utility model are in a 125° gear state;

[0048] Figure 7 It is a cross-sectional view of each air outlet channel when the valve core and the valve body of the utility model are in a 145° gear state;

[0049] Figure 8 It is a cross-sectional view of each air outlet passage when the valve core and the valve body of the utility model are in a 170° gear state.

[0050] In the figure, 100, valve body; 110, valve body air outlet channel A; 120, valve body air outlet channel B; 130, valve body air outlet channel C; 140, valve body air inlet channel E;

[0051] 200, valve core; 210, valve core groove A; 220, valve core groove B; 230, valve core groove C; 240, valve core groove D; 250, valve core groove E;

[0052] 300, bracket; 310, gear slot; 320, boss;

[0053] 400, gear wheel; 410, elastic sheet; 420, elastic convex part;

[0054] 500, valve stem structure; 510, valve stem;

[0055] 600. Valve cover. DETAILED DESCRIPTION

[0056] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical method of the present invention, but the present invention is not limited to these embodiments.

[0057] like Figure 1-8 As shown, the utility model provides a three-channel plug valve, comprising:

[0058] The valve body 100 has a valve body air outlet channel A110, a valve body air outlet channel B120, a valve body air outlet channel C130, and a valve body air inlet channel E140, wherein the valve body air inlet channel E140 is a total air inlet channel;

[0059] The valve core 200 is rotatably mounted in the valve body 100. The surface of the valve core 200 is provided with valve core grooves A210, B220, C230, D240 and E250 which are interlinked with each other. The rotation of the valve core 200 is the key action to realize the gas flow regulation.

[0060] The valve core groove E250 and the valve body air inlet channel E140 are on the same busbar and are used to control the entry of gas. When the valve core groove E250 is connected to the valve body air inlet channel E140, gas can enter the valve core 200. When the valve core groove E250 is not connected to the valve body 100 air inlet channel, gas cannot enter the valve core 200.

[0061] The valve core groove A210 and the valve body gas outlet channel A110, the valve core groove B220 and the valve body gas outlet channel B120, the valve core groove C230 and the valve core groove D240 and the valve body gas outlet channel C130 are respectively on the same busbar, which means that when the valve core 200 rotates, the connecting area between the valve core grooves A210, B, C and the corresponding gas outlet channels will change, thereby controlling the gas supply of each ring fire;

[0062] Specifically, as the valve core 200 rotates, the connection area (i.e., the opening) between the valve core 200 groove and the gas outlet channel of the valve body 100 located on the same busbar changes, and the gas flow rate of each channel is controlled according to the angle, sequence and duration of the connection. The larger the opening, the larger the gas flow cross-section, and the larger the corresponding gas flow rate of the gas outlet channel; conversely, the smaller the opening, the smaller the gas flow rate.

[0063] That is to say, the three-channel flow regulation structure provided in this embodiment can not only achieve the purpose of synchronously opening / closing the three gas outlet channels to ensure the consistency and safety of gas supply, but also can change the gas flow of the three gas outlet channels separately or jointly by adjusting the rotation angle of the valve core 200, thereby achieving independent or joint fire power regulation of the three-ring fire of the gas stove. Users can choose different fire power gears according to cooking needs to meet the requirements of refined cooking.

[0064] Preferably, Figure 3 As shown, when the valve core 200 is at the 0° position, the valve body air inlet channel E140 and the valve core groove E250 form a sealing angle to prevent gas from entering, ensuring the complete gas-off state of the plug valve, achieving the synchronous closure of all ring fires of the gas stove, and ensuring the safe use of the equipment.

[0065] Preferably, when the valve core 200 is rotating in the front gear (the valve core 200 rotates between 0°-35°), the valve body air inlet channel E140 and the valve core groove E250 are not connected, and the valve core groove A210 and the valve body air outlet channel A110, the valve core groove B220 and the valve body air outlet channel B120, and the valve core groove C230 and the valve body air outlet channel C130 are pre-connected. At this time, although the gas has not yet entered the valve body 100, each air outlet channel is ready to receive and transport the gas. Therefore, once the valve core 200 rotates to the point where the valve body air inlet channel E140 is connected to the valve core groove E250, the gas can quickly and synchronously enter and flow out of each air outlet channel, ensuring the rapid and synchronous start-up of the three-ring fire of the gas stove, thereby improving cooking efficiency and user experience.

[0066] This design avoids the problem of uneven gas output or ignition delay caused by delayed gas entry, and reflects the precision and response speed of the plug valve in controlling gas flow.

[0067] For example Figure 4 As shown, when the valve core 200 rotates to 35°, the air inlet channel E of the valve core 200 and the valve core groove E250 are on the edge of connection. At this time, the valve core groove A210 and the valve body air outlet channel A110, the valve core groove B220 and the valve body air outlet channel B120, and the valve core groove C230 and the valve body air outlet channel C130 are in a pre-connected state. Once the air inlet channel E of the valve core 200 is connected to the valve core groove E250, the purpose of synchronous ignition of the three channels can be achieved.

[0068] Preferably, in the first rotation stroke of the valve core 200 in the rear gear position (the valve core 200 rotates between 90°-125°):

[0069] The connection area between the valve body gas outlet channel B120 and the valve core groove B220 gradually decreases, which means that as the valve core 200 rotates, the overlapping area between the valve core groove B220 and the valve body gas outlet channel B120 becomes smaller, and the flow cross section of the gas through the channel decreases accordingly, resulting in a decrease in the gas flow rate of the second ring fire of the gas stove (corresponding to the valve body gas outlet channel B120) and a weakening of the firepower;

[0070] The connection area between the valve body air outlet channel A110 and the valve core groove A210 remains unchanged or gradually decreases; the connection area between the valve body air outlet channel C130 and the valve core groove C230 remains unchanged or gradually decreases.

[0071] That is to say, the valve body gas outlet channel B120 changes from high fire to low fire, while the valve body gas outlet channel A110 and the valve body gas outlet channel C130 may also change from high fire to low fire, or may remain unchanged, depending on the specific design scheme and user needs. If the valve body gas outlet channel A110 and the valve body gas outlet channel C130 are designed to remain unchanged, the gas flow of the first ring fire (corresponding to the valve body gas outlet channel A110) and the third ring fire (corresponding to the valve body gas outlet channel C130) of the gas stove will not change during the rotation stroke, and the firepower remains stable. If it is designed to gradually decrease, the gas flow of these two ring fires will also decrease with the rotation of the valve core 200, and the firepower will be weakened accordingly.

[0072] Preferably, in the second rotation stroke of the valve core 200 in the rear gear position (the valve core 200 rotates between 125°-145°):

[0073] The connection area between the valve body gas outlet channel B120 and the valve core groove B220 gradually decreases until it reaches 0, which means that as the valve core 200 further rotates, the overlapping area between the valve core groove B220 and the valve body gas outlet channel B120 gradually disappears, and the gas cannot flow through the channel to the second ring fire of the gas stove, and the ring fire is completely extinguished;

[0074] The connection area between the valve body gas outlet channel A110 and the valve core groove A210 remains unchanged or gradually decreases, depending on the specific design scheme and user needs. If it is designed to remain unchanged, the gas flow rate of the first ring fire of the gas stove (corresponding to the valve body gas outlet channel A110) will not change during the rotation stroke, and the firepower remains stable. If it is designed to gradually decrease, the gas flow rate of the ring fire will also decrease with the rotation of the valve core 200, and the firepower will be weakened accordingly.

[0075] The connection area between the valve body air outlet channel C130 and the valve core groove C230 remains unchanged, the gas flow rate of the third ring fire of the gas stove (corresponding to the valve body air outlet channel C130) is always maintained at the same level, and the firepower remains constant.

[0076] Preferably, the valve core 200 is in the third rotation stroke of the rear gear (the valve core 200 rotates between 145°-170°):

[0077] The connection area between the valve body air outlet channel B120 and the valve core groove B220 remains at 0, and the valve body air outlet channel B120 remains in a closed state;

[0078] The connection area between the valve body gas outlet channel A110 and the valve core groove A210 gradually decreases until it reaches 0, which means that as the valve core 200 further rotates, the overlapping area between the valve core groove A210 and the valve body gas outlet channel A110 gradually disappears, and the gas cannot flow through the channel to the first ring fire of the gas stove, and the ring fire is completely extinguished;

[0079] The connection area between the valve body air outlet channel C130 and the valve core groove C230 gradually decreases until it is 0, and at the same time, the connection area between the valve body air outlet channel C130 and the valve core groove D240 gradually increases until the two are fully connected, wherein the valve core groove D240 is the smallest air inlet hole, i.e., the fire-keeping hole, and at this time, the valve body air outlet channel C130 is in a fire-keeping state.

[0080] This series of actions reflects the ability of the valve core 200 to accurately adjust the opening and closing degree of each gas outlet channel according to operational requirements, so as to achieve effective control of gas flow, pressure or direction.

[0081] In addition, it should be noted that the fire protection function of the valve core groove D240 can be interchanged with the valve core groove B220.

[0082] Preferably, it also includes:

[0083] The bracket 300 has a receiving cavity, and a shift slot 310 is provided in the receiving cavity of the bracket 300;

[0084] The gear wheel 400 is rotatably disposed in the accommodating cavity. The gear wheel 400 has an elastic sheet 410 . As the gear wheel 400 rotates, the elastic sheet 410 switches between different gear slots 310 .

[0085] The gear wheel 400 is integrally formed by a main body and an elastic sheet 410. A single-point connection structure is formed between one end of the elastic sheet 410 and the main body to make the elastic sheet 410 elastic. The elastic sheet 410 has an elastic protrusion 420 protruding outward. During the rotation of the gear wheel 400, the elastic protrusion 420 switches between different gear slots 310.

[0086] Among them, during the rotation of the gear wheel 400, when the elastic protrusion 420 moves out of any gear slot 310, the elastic sheet 410 will be compressed and deformed. At this time, the elastic force of the elastic sheet 410 increases until the elastic protrusion 420 moves into the next gear slot 310 again, thereby making each gear have obvious damping feedback, realizing the gear feel effect when the user adjusts the gear.

[0087] Preferably, it also includes:

[0088] The valve stem structure 500 is installed on the valve body 100 and connected to the valve core 200, wherein the bracket 300 is installed on the valve stem structure 500, and the valve stem 510 of the valve stem structure 500 passes through the bracket 300 and the gear wheel 400. The rotation of the valve stem 510 drives the gear wheel 400 and the valve core 200 to rotate, thereby achieving the purpose of shifting.

[0089] The central axial hole of the bracket 300 has a boss 320 , which cooperates with the valve cover 600 to fix the plane direction of the gear wheel 400 so that it will not move up and down, and can reduce the shaking of the valve stem 510 and the gear wheel 400 .

[0090] The technical means disclosed in the scheme of the utility model are not limited to the technical means disclosed by the above technical means, but also include technical solutions composed of any combination of the above technical features. The above is a specific implementation method of the utility model. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

[0091] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0092] In addition, in the present invention, the descriptions of "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0093] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0094] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

Claims

1. A three-channel plug valve, characterized in that: include: The valve body has a valve body air outlet channel A, a valve body air outlet channel B, a valve body air outlet channel C, and a valve body air inlet channel E; The valve core is rotatably mounted in the valve body, and the surface of the valve core is provided with valve core grooves A, B, C, D and E which are interconnected, wherein: The valve core groove E and the valve body air inlet channel E are on the same busbar and are used to control the entry of gas; The valve core groove A and the valve body air outlet channel A, the valve core groove B and the valve body air outlet channel B, the valve core groove C and the valve core groove D and the valve body air outlet channel C are respectively on the same generatrix; As the valve core rotates, the connection area between the valve core groove and the valve body gas outlet channel on the same busbar changes, and the gas flow rate of each channel is controlled according to the connection angle, sequence and duration.

2. A three-channel plug valve according to claim 1, characterized in that: When the valve core is at the 0° position, the valve body air inlet passage E and the valve core groove E form a sealing angle to prevent the gas from entering.

3. A three-channel plug valve according to claim 1, characterized in that: During the rotation of the valve core in the front gear, the valve body air inlet channel E is not connected to the valve core groove E, and the valve core groove A and the valve body air outlet channel A, the valve core groove B and the valve body air outlet channel B, and the valve core groove C and the valve body air outlet channel C are pre-connected.

4. A three-channel plug valve according to claim 1, characterized in that: When the valve body air inlet channel E is connected to the valve core groove E, the valve body air outlet channel A, the valve body air outlet channel B, and the valve body air outlet channel C simultaneously discharge air.

5. A three-channel plug valve according to claim 1, characterized in that: In the first rotation stroke of the valve core in the rear gear position: The connection area between the valve body air outlet channel B and the valve core groove B gradually decreases; The connection area between the valve body air outlet channel A and the valve core groove A remains unchanged or gradually decreases; The connection area between the valve body air outlet channel C and the valve core groove C remains unchanged or gradually decreases.

6. A three-channel plug valve according to claim 1, characterized in that: In the second rotation stroke of the valve core in the rear gear position: The connection area between the valve body air outlet channel B and the valve core groove B gradually decreases until it is 0; The connection area between the valve body air outlet channel A and the valve core groove A remains unchanged or gradually decreases; The connection area between the valve body air outlet channel C and the valve core groove C remains unchanged.

7. A three-channel plug valve according to claim 1, characterized in that: In the third rotation stroke of the valve core in the rear gear position: The connection area between the valve body air outlet channel B and the valve core groove B is maintained at 0; The connection area between the valve body air outlet channel A and the valve core groove A gradually decreases until it is 0; The connection area between the valve body air outlet channel C and the valve core groove C gradually decreases until it is 0, and at the same time, the connection area between the valve body air outlet channel C and the valve core groove D gradually increases until the two are fully connected.

8. A three-channel plug valve according to claim 1, characterized in that: Also includes: A bracket having a receiving cavity, wherein a gear slot is provided in the receiving cavity of the bracket; A gear wheel is rotatably arranged in the accommodating cavity, and the gear wheel has an elastic sheet. As the gear wheel rotates, the elastic sheet switches between different gear slots.

9. A three-channel plug valve according to claim 8, characterized in that: The gear wheel is integrally formed by a main body and the elastic sheet, a single-point connection structure is formed between one end of the elastic sheet and the main body to make the elastic sheet elastic, and the elastic sheet has an elastic protrusion protruding outward, and during the rotation of the gear wheel, the elastic protrusion switches between different gear slots.

10. A three-channel plug valve according to claim 8, characterized in that: Also includes: A valve stem structure is installed on the valve body and connected to the valve core, wherein the bracket is installed on the valve stem structure, and the valve stem of the valve stem structure passes through the bracket and the gear wheel, and the gear wheel and the valve core are driven to rotate by the rotation of the valve stem.

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