Gas valve resistant to air leakage

Abstract

The present invention discloses a gas valve that prevents air leakage, which includes a valve body, a valve core, a valve stem, a connecting piece, and an elastic component. The connecting piece is movably arranged in the valve cavity. The connecting piece can rotate following the valve stem, the connecting piece can be inserted into the valve core or the connecting piece is movably connected to the valve core, the connecting piece can drive the valve core to rotate, and the connecting piece can move relative to the valve core in the up-and-down direction; the elastic component includes a first spring arranged between the valve stem and the connecting piece, and / or a second spring arranged between the valve stem and the valve core; wherein, the valve stem can move downward relative to the connecting piece and drive the valve core to rotate through the connecting piece to open or close the air inlet passage. Thus, when the valve stem pops outwards, it may drive the connecting piece to move upwards relative to the valve core, but it is not easy to drive the valve core to move upwards, so that the risk of gas leakage and other phenomena caused by the valve core moving upwards relative to the valve body can be reduced, and the use safety of the gas valve can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of gas valves, and particularly relates to a gas valve with leak prevention. Background Art

[0002] Existing gas valves generally include a valve body, a valve core, and a valve stem. The valve body has a valve cavity and an air inlet passage communicating with the valve cavity. The valve core is movably installed in the valve cavity. The valve stem can move downward to be inserted into the valve core and drive the valve core to rotate to open or close the air inlet passage. A compression spring is connected between the valve stem and the valve core. When it is necessary to open or close the air inlet passage, the valve stem is pressed down to make the compression spring contract, and then the valve stem is rotated to drive the valve core to rotate to open or close the air inlet passage. Then the valve stem is released, and the valve stem can move upward away from the valve core under the elastic action of the compression spring.

[0003] However, since the valve stem and the valve core are inserted into each other, during the upward ejection process of the valve stem, the valve stem may drive the valve core to move upward relative to the valve body, resulting in air leakage and potential safety hazards. Summary of the Invention

[0004] The present invention aims to at least solve one of the technical problems existing in the prior art. For this purpose, the present invention provides a gas valve with leak prevention, which can reduce the risk of air leakage when the valve stem ejects.

[0005] The gas valve with leak prevention according to an embodiment of the present invention includes: a valve body having a valve cavity, an air inlet passage, and an air outlet passage communicating with the valve cavity; a valve core rotatably installed in the valve cavity, and the valve core can rotate relative to the valve body to open or close the air inlet passage; a valve stem movably installed in the valve cavity and extending outside the valve body; a connecting member movably arranged in the valve cavity and located between the valve core and the valve stem. The connecting member can rotate following the valve stem, the connecting member can be inserted into the valve core or the connecting member is movably connected to the valve core, the connecting member can drive the valve core to rotate, and the connecting member can move up and down relative to the valve core; an elastic component including a first spring provided between the valve stem and the connecting member, and / or a second spring provided between the valve stem and the valve core; wherein, the valve stem can move downward relative to the connecting member and drive the valve core to rotate to open or close the air inlet passage through the connecting member.

[0006] The gas valve with leak prevention according to an embodiment of the present invention has at least the following beneficial effects:

[0007] In the above structure, a connecting piece is movably arranged between the valve core and the valve stem, and a first spring is arranged between the connecting piece and the valve stem. When the air intake channel needs to be opened or closed, the valve stem can be pressed down to compress the elastic component, and then the valve stem is rotated. The valve stem can drive the valve core to rotate through the connecting piece to open or close the air intake channel. Finally, the valve stem is released, and the valve stem can pop up upward under the elastic action of the elastic component. In this process, since the valve stem is not directly connected to the valve core, but drives the valve core to rotate through the connecting piece, the valve stem may drive the connecting piece to move upward relative to the valve core when it pops out, but it is not easy to drive the valve core to move upward. Therefore, the risk of gas leakage caused by the upward movement of the valve core relative to the valve body can be reduced, thereby improving the safety of the gas valve.

[0008] According to some embodiments of the present invention, the elastic component includes the first spring and the second spring, the first spring is sleeved on the outer circumference of the valve stem and the connecting member, and one end of the first spring abuts against the valve stem, and the other end abuts against the connecting member; the second spring is passed through the inside of the connecting member, and one end of the second spring abuts against the valve stem, and the other end abuts against the valve core.

[0009] According to some embodiments of the present invention, it is characterized in that the outer periphery of the connecting member has a first limiting portion, the outer periphery of the valve stem has a second limiting portion, the upper end of the first spring abuts against the second limiting portion, and the lower end of the first spring abuts against the first limiting portion; the second limiting portion is provided with a second protrusion protruding upward, the upper surface of the second protrusion abuts against the top wall of the valve cavity, the top wall of the valve cavity is provided with a first protrusion protruding downward, and the first protrusion can abut against the side of the second protrusion to prevent the valve stem from rotating.

[0010] According to some embodiments of the present invention, the air intake channel has a first connecting port extending to the side wall of the valve cavity, the side wall of the valve core is provided with a second connecting port connected to the valve cavity, and the valve core can rotate relative to the valve body so that the first connecting port and the second connecting port are connected to each other or staggered.

[0011] According to some embodiments of the present invention, the air outlet channel is located below the valve cavity, the valve core has a connecting channel, the second connecting port is connected to the valve cavity through the connecting channel, the valve core is installed with a blocking piece capable of blocking the connecting channel, the blocking piece is located at the upper end of the connecting channel, and the lower end of the second spring abuts against the blocking piece.

[0012] According to some embodiments of the present invention, a first connection structure is provided between the connecting member and the valve stem. The first connection structure includes a first connection portion and a second connection portion. One of the first connection portion and the second connection portion is provided on the connecting member, and the other is provided on the valve stem. One end of the first connection portion close to the second connection portion is provided with a first card slot arranged in the up-down direction. The second connection portion can move in and out of the first card slot relative to the first connection portion in the up-down direction. When the second connection portion is inserted into the first card slot, the valve stem can drive the valve core to rotate synchronously.

[0013] According to some embodiments of the present invention, when the second connection portion is inserted into the first card slot, the second connection portion and the first card slot are in clearance fit.

[0014] According to some embodiments of the present invention, a second connection structure is provided between the connecting member and the valve core. The second connection structure includes a third connection portion and a fourth connection portion. One of the third connection portion and the fourth connection portion is provided on the connecting member, and the other is provided on the valve core. One end of the third connection portion close to the fourth connection portion is provided with a second card slot arranged in the up-down direction. The fourth connection portion is inserted into the second card slot and can move relative to the third connection portion along the second card slot, and the connecting member can also drive the valve core to rotate synchronously.

[0015] According to some embodiments of the present invention, the fourth connection portion and the second card slot are in clearance fit.

[0016] According to some embodiments of the present invention, an abutting position located on the outer periphery of the valve core is provided on the inner peripheral wall of the valve cavity. The lower end of the connecting member abuts against the abutting position, and the fourth connection portion is movably inserted into the second card slot.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a schematic diagram of a gas valve for preventing air leakage according to an embodiment of the present invention;

[0020] Figure 2 is Figure 1 a cross-sectional schematic diagram of the gas valve for preventing air leakage in

[0021] Figure 3 is Figure 1Another cross-sectional schematic diagram of the gas valve for preventing air leakage;

[0022] Figure 4 Partial structural decomposition diagram of the gas valve for preventing air leakage according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Valve body 100, valve cavity 110, intake passage 120, first communication port 121, outlet passage 130, abutting position 140;

[0025] Valve core 200, communication passage 210, second communication port 220, plugging member 230, fourth connection portion 240;

[0026] Valve stem 300, second connection portion 310, second limiting portion 320, second protruding portion 321;

[0027] Connecting member 400, first spring 410, second spring 420, first connection portion 430, first card slot 431, third connection portion 440, second card slot 441, first limiting portion 450. Detailed implementation manners

[0028] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0029] In the description of the present invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0030] In the description of the present invention, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including the present number, and above, below, within, etc. are understood as including the present number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and should not be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0032] Referring to Figures 1 to 4 , an embodiment of the present invention provides a gas valve that prevents air leakage. The gas valve includes a valve body 100, a valve core 200, a valve rod 300, an elastic component, and a connecting member 400. The valve body 100 has a valve cavity 110 and an air inlet passage 120 and an air outlet passage 130 that communicate with the valve cavity 110. The valve core 200 is rotatably installed in the valve cavity 110 and can rotate relative to the valve body 100 to open or close the air inlet passage 120. The valve rod 300 is movably installed in the valve cavity 110 and extends outside the valve body 100. The connecting member 400 is movably disposed in the valve cavity 110 and is located between the valve core 200 and the valve rod 300. The connecting member 400 can rotate following the valve rod 300. The connecting member 400 can be inserted into or movably connected to the valve core 200. The connecting member 400 can drive the valve core 200 to rotate, and the connecting member 400 can move up and down relative to the valve core 200. The elastic component includes a first spring 410 disposed between the valve rod 300 and the connecting member 400 and a second spring 420 disposed between the valve rod 300 and the valve core 200. Wherein, the valve rod 300 can move downward relative to the connecting member 400 and drive the valve core 200 to rotate to open or close the air inlet passage 120 through the connecting member 400.

[0033] In the above structure, by movably disposing the connecting member 400 between the valve core 200 and the valve rod 300 and providing the first spring 410 between the connecting member 400 and the valve rod 300, when it is necessary to open or close the air inlet passage 120, the valve rod 300 can be pressed down to compress the elastic component, and then the valve rod 300 is rotated. The valve rod 300 can drive the valve core 200 to rotate to open or close the air inlet passage 120 through the connecting member 400. Finally, the valve rod 300 is released, and the valve rod 300 can pop up upward under the elastic action of the elastic component. During this process, since the valve rod 300 is not directly connected to the valve core 200 but drives the valve core 200 to rotate through the connecting member 400, when the valve rod 300 pops out outward, it may drive the connecting member 400 to move upward relative to the valve core 200, but it is not easy to drive the valve core 200 to move upward. Therefore, the risk of gas leakage and other phenomena caused by the upward movement of the valve core 200 relative to the valve body 100 can be reduced, and the use safety of the gas valve can be improved.

[0034] It can be understood that the above-mentioned connecting member 400 can be inserted into the valve core 200 or the connecting member 400 is movably connected to the valve core 200. Specifically, in some embodiments, the connecting member 400 can be inserted into the valve core 200, that is, the connecting member 400 is movably installed in the valve cavity 110 and can move up and down relative to the valve body 100. The valve stem 300 can move downward and push the connecting member 400 downward until it is inserted into the valve core 200. At this time, the valve stem 300 can drive the valve core 200 to rotate to open or close the air inlet passage 120 through the connecting member 400. Or, in other embodiments, the connecting member 400 is movably connected to the valve core 200, that is, the connecting member 400 is movably installed in the valve cavity 110 and is directly movably connected to the valve core 200. The valve stem 300 can move downward to be connected to the connecting member 400. At this time, the valve stem 300 can drive the valve core 200 to rotate to open or close the air inlet passage 120 through the connecting member 400. In the above two embodiments, after the valve stem 300 is released, the valve stem 300 can pop up upward under the elastic action of the elastic component. And in this process, since the valve stem 300 is not directly connected to the valve core 200, when the valve stem 300 pops up upward, it will drive the connecting member 400 to move upward relative to the valve core 200, but it is not easy to drive the valve core 200 to move upward. Therefore, the risk of gas leakage and other phenomena caused by the upward movement of the valve core 200 relative to the valve body 100 can be reduced, and the use safety of the gas valve can be improved.

[0035] It can be understood that the above-mentioned elastic component includes a first spring 410 disposed between the valve stem 300 and the connecting member 400 and a second spring 420 disposed between the valve stem 300 and the valve core 200, which is only Figures 1 to 4 an exemplary illustration. In order to realize the reset of the valve stem 300, in addition to including the first spring 410 and the second spring 420, the elastic component can also only include the first spring 410 disposed between the valve stem 300 and the connecting member 400, or only include the second spring 420 disposed between the valve stem 300 and the valve core 200. The present invention does not make specific limitations on this.

[0036] Referring to Figures 1 to 4 , in some embodiments, the elastic component includes a first spring 410 and a second spring 420. The first spring 410 is sleeved on the outer peripheries of the valve stem 300 and the connecting member 400, and one end of the first spring 410 abuts against the valve stem 300 and the other end abuts against the connecting member 400. The second spring 420 is inserted through the inside of the connecting member 400, and one end of the second spring 420 abuts against the valve stem 300 and the other end abuts against the valve core 200.

[0037] In the above structure, the arrangement of the first spring 410 and the second spring 420 can make the structure of the gas valve more compact and the operation more stable. And when the valve stem 300 bounces upward, the second spring 420 can give a downward thrust to the valve core 200 to prevent the valve core 200 from moving upward following the valve stem 300.

[0038] Referring to Figures 1 to 4 , in some embodiments, the outer periphery of the connecting member 400 has a first limiting portion 450, the outer periphery of the valve stem 300 has a second limiting portion 320, the upper end of the first spring 410 abuts against the second limiting portion 320, the lower end of the first spring 410 abuts against the first limiting portion 450, the second limiting portion 320 is provided with an upwardly protruding second protrusion 321, the upper surface of the second protrusion 321 abuts against the top wall of the valve cavity 110, and the top wall of the valve cavity 110 is provided with a downwardly protruding first protrusion. The first protrusion can abut against the side surface of the second protrusion 321 to prevent the valve stem 300 from rotating.

[0039] In the above structure, the arrangement of the first limiting portion 450 and the second limiting portion 320 can facilitate the installation and fixation of the first spring 410, and the arrangement of the first protrusion and the second protrusion 321 can limit the rotation of the valve stem 300. That is, when the side surface of the second protrusion 321 abuts against the first protrusion, the first protrusion can prevent the second protrusion 321 from rotating. Only when the valve stem 300 is pressed down until the second protrusion 321 is located below the first protrusion can the valve stem 300 be rotated to drive the valve core 200 to rotate to open or close the air inlet passage 120 through the connecting member 400. In addition, the arrangement of the second protrusion 321 can also limit the up and down movement of the valve stem 300. When the second protrusion 321 abuts against the top wall of the valve cavity 110, the valve stem 300 can no longer move upward, thereby preventing the valve stem 300 from moving upward to be disconnected from the valve body 100.

[0040] Referring to Figures 1 to 3 , in some embodiments, the air inlet passage 120 has a first communication port 121 extending to the side wall of the valve cavity 110, the side wall of the valve core 200 is provided with a second communication port 220 communicating with the valve cavity 110, and the valve core 200 can rotate relative to the valve body 100 so that the first communication port 121 and the second communication port 220 communicate with each other or are staggered.

[0041] In the above structure, when the valve core 200 rotates relative to the valve body 100 until the first communication port 121 and the second communication port 220 communicate with each other, the air inlet passage 120 is opened. When the valve core 200 rotates relative to the valve body 100 until the first communication port 121 and the second communication port 220 are staggered, the air inlet passage 120 is closed. The structure is simple and easy to operate.

[0042] Referring to Figures 1 to 3In some embodiments, the air outlet channel 130 is located below the valve cavity 110, the valve core 200 has a connecting channel 210, the second connecting port 220 is connected to the valve cavity 110 through the connecting channel 210, and the valve core 200 is installed with a blocking member 230 capable of blocking the connecting channel 210. The blocking member 230 is located at the upper end of the connecting channel 210, and the lower end of the second spring 420 abuts against the blocking member 230.

[0043] In the above structure, the provision of the blocking member 230 facilitates the installation of the second spring 420 and facilitates the production and processing of the valve core 200. By providing the blocking member 230, when manufacturing the valve core 200, it is sufficient to directly open the connecting passage 210 through the valve core 200. The blocking member 230 is then installed at the upper end of the connecting passage 210 to block the connecting passage 210. This provides a simple structure and easy installation.

[0044] Reference Figures 1 to 4 In some embodiments, a first connecting structure is provided between the connecting member 400 and the valve stem 300. The first connecting structure includes a first connecting portion 430 provided on the connecting member 400 and a second connecting portion 310 provided on the valve stem 300. The first connecting portion 430 is provided with a first card groove 431 arranged in the up-down direction at one end close to the second connecting portion 310. The second connecting portion 310 can move in and out of the first card groove 431 relative to the first connecting portion 430 in the up-down direction. When the second connecting portion 310 is inserted into the first card groove 431, the valve stem 300 can drive the valve core 200 to rotate synchronously.

[0045] In the above structure, by providing a first engaging groove 431 on the first connecting portion 430, the valve stem 300 is pressed downward during use so that the second connecting portion 310 of the valve stem 300 is inserted into the first engaging groove 431. At this time, the valve stem 300 can drive the connecting member 400 to rotate synchronously, thereby driving the valve core 200 to rotate relative to the valve body 100 to open or close the air inlet passage 120. When the valve stem 300 is released, the valve stem 300 can move upward along the first engaging groove 431 under the elastic action of the elastic component and eventually disengage from the first engaging groove 431.

[0046] It is understandable that, referring to Figures 1 to 4 The first connecting portion 430 of the connecting member 400 is provided with two first slots 431 arranged opposite to each other, and the second connecting portion 310 of the valve stem 300 can be inserted into the two first slots 431 .

[0047] It is understandable that, referring to Figures 1 to 4, in the above structure, the first connecting portion 430 is disposed on the connecting member 400. Specifically, the first connecting portion 430 and the connecting member 400 may be provided as an integral structure, or the first connecting portion 430 may also be fixedly connected to the connecting member 400. Similarly, the second connecting portion 310 is disposed on the valve stem 300. Specifically, the second connecting portion 310 and the valve stem 300 may also be provided as an integral structure, or the second connecting portion 310 may also be fixedly connected to the valve stem 300.

[0048] It can be understood that in the above structure, the first connecting portion 430 is disposed on the connecting member 400, and the second connecting portion 310 is disposed on the valve stem 300, which is only an exemplary illustration of Figures 1 to 4 . In some other embodiments, it may also be that the first connecting portion 430 is disposed on the valve stem 300 and the second connecting portion 310 is disposed on the connecting member 400. The present invention does not make specific limitations thereto, as long as one of the first connecting portion 430 and the second connecting portion 310 is disposed on the connecting member 400 and the other is disposed on the valve stem 300.

[0049] It can be understood that in order to enable the connecting member 400 to move relative to the valve stem 300 in the up and down direction and the connecting member 400 to rotate synchronously with the valve stem 300, in addition to opening a first slot 431 at one end of the first connecting portion 430 close to the second connecting portion 310 that can be inserted into the second connecting portion 310, a non-circular slot may also be opened at one end of the first connecting portion 430 close to the second connecting portion 310, and the cross-sectional shape of the second connecting portion 310 is set to be non-circular and adapted to the cross-sectional shape of the slot.

[0050] Referring to Figures 1 to 4 , in some embodiments, when the second connecting portion 310 is inserted into the first slot 431, the second connecting portion 310 and the first slot 431 are in clearance fit.

[0051] In the above structure, the second connecting portion 310 and the first slot 431 are in clearance fit, that is, there is a gap between the side wall of the first slot 431 and the side wall of the second connecting portion 310. Thus, when the valve stem 300 pops up upward, the second connecting portion 310 can be easily disengaged from the connection with the first slot 431, thereby further preventing the valve stem 300 from driving the connecting member 400 to move upward, and further increasing the difficulty of the connecting member 400 driving the valve core 200 to move upward. Therefore, the risk of gas leakage and other phenomena caused by the valve core 200 moving upward relative to the valve body 100 can be further reduced, and the use safety of the gas valve can be improved.

[0052] Referring to Figures 1 to 4, in some embodiments, a second connection structure is provided between the connecting member 400 and the valve core 200. The second connection structure includes a third connection portion 440 provided on the connecting member 400 and a second connection portion 310 provided on the valve core 200. A second card slot 441 arranged in the up-and-down direction is formed at one end of the third connection portion 440 close to the fourth connection portion 240. The fourth connection portion 240 is inserted into the second card slot 441 and can move relative to the third connection portion 440 along the second card slot 441. The connecting member 400 can also drive the valve core 200 to rotate synchronously.

[0053] In the above structure, by forming the second card slot 441 in the third connection portion 440 and movably inserting the fourth connection portion 240 into the second card slot 441, thus, when the valve stem 300 moves downward to be connected to the connecting member 400, the valve stem 300 can drive the valve core 200 to rotate relative to the valve body 100 through the connecting member 400 to open or close the air inlet passage 120. When the valve stem 300 rebounds upward under the elastic action of the elastic component, the third connection portion 440 can move upward relative to the fourth connection portion 240, that is, the valve stem 300 can drive the connection portion to move upward but is not easy to drive the valve core 200 to move upward. Thereby, the risk of gas leakage and other phenomena caused by the upward movement of the valve core 200 relative to the valve body 100 can be reduced, and the use safety of the gas valve can be improved.

[0054] It can be understood that, referring to Figures 1 to 4 , two sets of second connection structures are provided between the connecting member 400 and the valve core 200, that is, the connecting member 400 has two third connection portions 440, and each second connection portion 310 is provided with a second card slot 441. The valve core 200 is provided with two fourth connection portions 240 corresponding to the respective second card slots 441 one by one. Of course, the specific number of the second connection structures can be not only two sets, but also one set, three sets or more sets. The present invention does not make specific limitations on this.

[0055] It can be understood that, referring to Figures 1 to 4 , in the above structure, the third connection portion 440 is provided on the connecting member 400. Specifically, the third connection portion 440 can be integrally formed with the connecting member 400, or the third connection portion 440 can also be fixedly connected to the connecting member 400. Similarly, the fourth connection portion 240 is provided on the valve core 200. Specifically, the fourth connection portion 240 can also be integrally formed with the valve core 200, or the fourth connection portion 240 can also be fixedly connected to the valve core 200.

[0056] It can be understood that, in the above structure, the third connection portion 440 is provided on the connecting member 400 and the fourth connection portion 240 is provided on the valve core 200, only for Figures 1 to 4An exemplary illustration is that in other embodiments, the third connecting portion 440 may be provided on the valve core 200, and the fourth connecting portion 240 may be provided on the connecting member 400. The present invention does not make specific limitations on this, as long as one of the third connecting portion 440 and the fourth connecting portion 240 is provided on the connecting member 400 and the other is provided on the valve core 200.

[0057] It can be understood that in order to enable the connecting member 400 to move relative to the valve core 200 in the up and down direction and enable the connecting member 400 to drive the valve core 200 to rotate synchronously, in addition to opening a second card slot 441 for movable insertion with the fourth connecting portion 240 at one end of the third connecting portion 440 close to the fourth connecting portion 240, a non-circular slot may also be opened at one end of the third connecting portion 440 close to the fourth connecting portion 240, and the cross-sectional shape of the fourth connecting portion 240 may be set to a non-circular shape adapted to the cross-sectional shape of the slot.

[0058] Refer to Figures 1 to 3 , in some embodiments, the fourth connecting portion 240 is in clearance fit with the second card slot 441.

[0059] In the above structure, the fourth connecting portion 240 is in clearance fit with the second card slot 441, that is, there is a gap between the side wall of the second card slot 441 and the side wall of the fourth connecting portion 240. Thus, when the connecting member 400 moves upward following the valve rod 300, the fourth connecting portion 240 can more easily disengage from the connection with the second card slot 441. Thereby, the difficulty for the connecting member 400 to drive the valve core 200 to move upward can be further increased, and thus the risk of gas leakage and other phenomena caused by the valve core 200 moving upward relative to the valve body 100 can be further reduced, improving the use safety of the gas valve.

[0060] Refer to Figures 1 to 3 , in some embodiments, an abutting position 140 located outside the valve core 200 is provided on the inner peripheral wall of the valve cavity 110, the lower end of the connecting member 400 abuts against the abutting position 140, and the fourth connecting portion 240 is movably inserted into the second card slot 441.

[0061] In the above structure, the provision of the abutting position 140 can facilitate the installation of the connecting member 400, enabling the connecting member 400 to be more stably installed in the valve cavity 110.

[0062] The embodiments of the present invention have been described in detail above with reference to the drawings, but the present invention is not limited to the above embodiments. Various changes can be made without departing from the gist of the present invention within the knowledge scope of those of ordinary skill in the art.

Claims

1. A gas valve that prevents air leakage, characterized in that, Comprising: A valve body (100) having a valve cavity (110), an intake passage (120) and an exhaust passage (130) communicating with the valve cavity (110); A valve core (200) rotatably mounted in the valve cavity (110), the valve core (200) being able to rotate relative to the valve body (100) to open or close the intake passage (120); A valve stem (300) movably mounted in the valve cavity (110) and extending outside the valve body (100); A connecting member (400) movably disposed in the valve cavity (110) and located between the valve core (200) and the valve stem (300), the connecting member (400) being able to rotate following the valve stem (300), the connecting member (400) being able to be inserted into the valve core (200) or the connecting member (400) being movably connected to the valve core (200), the connecting member (400) being able to drive the valve core (200) to rotate, and the connecting member (400) being able to move in the vertical direction relative to the valve core (200); An elastic component including a first spring (410) disposed between the valve stem (300) and the connecting member (400), and / or a second spring (420) disposed between the valve stem (300) and the valve core (200); Wherein, the valve stem (300) can move downward relative to the connecting member (400) and drive the valve core (200) to rotate to open or close the intake passage (120) through the connecting member (400); The elastic component includes the first spring (410) and the second spring (420), The first spring (410) is sleeved on the outer peripheries of the valve stem (300) and the connecting member (400), and one end of the first spring (410) abuts against the valve stem (300), and the other end abuts against the connecting member (400); The second spring (420) is disposed inside the connecting member (400), and one end of the second spring (420) abuts against the valve stem (300), and the other end abuts against the valve core (200); The outer periphery of the connecting member (400) has a first limiting portion (450), the outer periphery of the valve stem (300) has a second limiting portion (320), the upper end of the first spring (410) abuts against the second limiting portion (320), and the lower end of the first spring (410) abuts against the first limiting portion (450); The second limiting portion (320) is provided with an upwardly protruding second protruding portion (321), the upper surface of the second protruding portion (321) abuts against the top wall of the valve cavity (110), and the top wall of the valve cavity (110) is provided with a downwardly protruding first protruding portion, and the first protruding portion can abut against the side surface of the second protruding portion (321) to prevent the valve stem (300) from rotating; The air inlet passage (120) has a first communication port (121) extending to the side wall of the valve cavity (110); the side wall of the valve core (200) is provided with a second communication port (220) communicating with the valve cavity (110); the valve core (200) is rotatable relative to the valve body (100) so that the first communication port (121) and the second communication port (220) are in communication with or staggered with each other; The air outlet channel (130) is located below the valve cavity (110), the valve core (200) has a connecting channel (210), the second connecting port (220) is connected to the valve cavity (110) through the connecting channel (210), and the valve core (200) is equipped with a blocking member (230) capable of blocking the connecting channel (210), the blocking member (230) is located at the upper end of the connecting channel (210), and the lower end of the second spring (420) abuts against the blocking member (230).

2. The gas valve for preventing air leakage according to claim 1, wherein A first connection structure is provided between the connecting member (400) and the valve stem (300), the first connection structure comprising a first connection portion (430) and a second connection portion (310), one of the first connection portion (430) and the second connection portion (310) being provided on the connecting member (400), and the other being provided on the valve stem (300); A first clamping groove (431) arranged in an up-down direction is provided at one end of the first connecting portion (430) close to the second connecting portion (310); the second connecting portion (310) can move in and out of the first clamping groove (431) relative to the first connecting portion (430) in an up-down direction; when the second connecting portion (310) is inserted into the first clamping groove (431), the valve stem (300) can drive the valve core (200) to rotate synchronously.

3. The gas valve for preventing air leakage according to claim 2, wherein, When the second connecting portion (310) is inserted into the first card slot (431), the second connecting portion (310) and the first card slot (431) are clearance-matched.

4. The gas valve for preventing air leakage according to claim 1, characterized in that, A second connection structure is provided between the connection member (400) and the valve core (200), the second connection structure comprising a third connection portion (440) and a fourth connection portion (240), one of the third connection portion (440) and the fourth connection portion (240) being provided on the connection member (400), and the other being provided on the valve core (200); The third connecting portion (440) is provided with a second slot (441) arranged in an up-down direction at one end thereof close to the fourth connecting portion (240); the fourth connecting portion (240) is inserted into the second slot (441) and is movable relative to the third connecting portion (440) along the second slot (441); and the connecting member (400) is also capable of driving the valve core (200) to rotate synchronously.

5. The gas valve for preventing air leakage according to claim 4, characterized in that, The fourth connecting portion (240) is clearance-fitted with the second clamping slot (441).

6. The gas valve for preventing air leakage according to claim 4, characterized in that, The inner peripheral wall of the valve cavity (110) is provided with an abutting position (140) located on the outer periphery of the valve core (200). The lower end of the connecting member (400) abuts against the abutting position (140), and the fourth connecting portion (240) is movably inserted into the second card slot (441).

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