A valve for a gas cylinder and a heater

Abstract

A valve for a gas cylinder, comprising a gas valve connected to the gas cylinder body; a one-way valve is provided at the interface end of the cylinder body; a connecting slot hole that is threadedly matched with the interface end of the cylinder body is provided at the air inlet end of the gas valve; a thimble is provided in the connecting slot hole; an annular sealing sleeve is further provided at the air inlet end; the outer diameter of one end of the sealing sleeve away from the air inlet end is less than or equal to the inner diameter of the interface end of the cylinder body; when the cylinder body is screwed with the gas valve through threads, the end of the sealing sleeve away from the air inlet end comes into contact with the interface end of the cylinder body prior to the thimble; thus, a sealing structure is formed between the sealing sleeve and the cylinder body before the thimble opens the one-way valve, improving the sealing performance between the gas valve and the cylinder body, reducing the risk of gas leakage, and enhancing the safety of the valve for the gas cylinder during use.

Description

Technical Field

[0001] This application relates to the technical field of gas cylinder safety, and particularly to a valve for a gas cylinder and a heater. Background Art

[0002] People usually choose outdoor activities as a way to relieve stress and relax. When people choose to travel outdoors, in order to solve the problems of diet and heating during accommodation, heaters are usually needed. Most of the current outdoor heaters use gas-driven methods, that is, they include a furnace body, and a gas cylinder for supplying gas is connected below the furnace body. The gas cylinder and the furnace body are connected through a valve and a burner assembly to control the on-off of the gas cylinder.

[0003] A Chinese patent discloses a heater (publication number: CN211399982U), which includes a main body; a burner assembly installed on the main body; a gas cylinder placed in the main body and located directly below the burner assembly, and the interface end of the gas cylinder is connected to the fuel inlet end of the burner assembly through a valve; a reflector installed in the main body and located between the burner assembly and the gas cylinder to block the heat from the bottom of the burner head of the burner assembly from directly radiating to the interface end of the gas cylinder, and allowing the heat around the burner head to radiate to the surrounding position of the upper interface end of the gas cylinder and heat the gas cylinder. The valve structure is basically the same as the conventional structure in the art.

[0004] The valve structure commonly used in the art usually includes a check valve and a thimble. When the thimble touches the check valve, the check valve opens, and the gas cylinder supplies gas through the valve. When the thimble leaves the check valve, the check valve closes under the action of the gas pressure in the gas cylinder, and the gas cylinder stops supplying gas. A sealing ring is also provided between the gas cylinder and the valve. When the gas cylinder approaches the valve until the thimble touches the check valve, the gas cylinder and the valve also touch the sealing ring with each other. At this time, a sealed environment is formed between the gas cylinder and the valve through the sealing ring, and the gas is output from the check valve of the gas cylinder and transported to the furnace body through the burner assembly, and no leakage occurs at the connection between the gas cylinder and the valve.

[0005] However, due to the low processing accuracy of the gas cylinder and the valve in the prior art, there is often a problem that the length of the thimble is too long. When the thimble has touched the check valve and opened the check valve, the gas cylinder has not yet touched the sealing ring, resulting in no sealed connection between the gas cylinder and the valve, and gas leakage occurs between the gas cylinder and the valve. If the user ignites the heater at this time, there is a risk of explosion. Summary of the Invention

[0006] To solve the problems existing in the above-mentioned prior art, the present invention provides a valve for a gas cylinder and a heater. The valve for the gas cylinder and the heater are provided with an additional sealing sleeve, and the sealing sleeve can contact the gas cylinder prior to the thimble, thereby preventing gas leakage and having the advantage of safer use.

[0007] The technical solution adopted in this application is as follows:

[0008] A valve for a gas cylinder, comprising a gas valve connected to the gas cylinder body;

[0009] A one-way valve is provided at the interface end of the body;

[0010] A connection groove hole that is threadedly engaged with the interface end of the body is provided at the intake end of the gas valve;

[0011] A thimble is provided in the connection groove hole;

[0012] An annular sealing sleeve is further provided at the intake end; the outer diameter of one end of the sealing sleeve away from the intake end is less than or equal to the inner diameter of the interface end of the body;

[0013] When the body is screwed with the gas valve, the end of the sealing sleeve away from the intake end contacts the interface end of the body prior to the thimble.

[0014] According to an embodiment of the present invention, the intake end further includes a connection ring for enclosing and forming the connection groove hole;

[0015] A mating groove is further provided at the interface end of the body, and the mating groove is annular and provided on the periphery of the one-way valve;

[0016] The projection of the sealing sleeve on the body falls into the mating groove.

[0017] When the body and the gas valve are tightened, the sealing sleeve first contacts the interface end of the body to form a sealing structure, and then the thimble contacts and opens the one-way valve, thereby ensuring that gas does not leak.

[0018] According to an embodiment of the present invention, the interface end of the body further includes a connection block, and the one-way valve is arranged in the connection block;

[0019] External threads are provided on the outer peripheral surface of the connection block, and the body is threadedly engaged with the connection groove hole through the connection block.

[0020] The body is connected to the gas valve through threaded engagement. When the distance between the body and the gas valve needs to be changed, the movement is more flexible, and the distance between the body and the gas valve can be fixed through threaded engagement.

[0021] According to an embodiment of the present invention, a sealing groove is provided on the periphery of the connection ring, and the sealing sleeve is fixedly connected in the sealing groove.

[0022] According to an embodiment of the present invention, one end of the sealing sleeve away from the air inlet end can contact and be sealingly connected to the fitting groove;

[0023] When the gas cylinder and the gas valve are not screwed together, the distance between the sealing sleeve and the fitting groove is less than the distance between the ejector pin and the one-way valve.

[0024] The sealing sleeve can touch the fitting groove and form a sealing structure, thereby ensuring that the gas does not leak.

[0025] According to an embodiment of the present invention, an annular convex edge formed by the convex gas cylinder is further provided on the periphery of the fitting groove;

[0026] The sealing sleeve can contact and be sealingly connected to the convex edge;

[0027] When the gas cylinder and the gas valve are not screwed together, the distance between the sealing sleeve and the convex edge is less than the distance between the ejector pin and the one-way valve.

[0028] The sealing sleeve can touch the convex edge and form a sealing structure, thereby ensuring that the gas does not leak.

[0029] According to an embodiment of the present invention, a sealing ring is provided in the connecting groove hole, and the sealing ring is used to improve the sealing performance between the gas cylinder and the connecting groove hole.

[0030] According to an embodiment of the present invention, the projection of the ejector pin on the gas cylinder falls within the range of the one-way valve;

[0031] The ejector pin is of a hollow structure and communicates with the air inlet end and the air outlet end of the gas valve;

[0032] The ejector pin is used to push open the one-way valve, so that the gas in the gas cylinder is transported to the outside of the gas cylinder through the one-way valve.

[0033] After the ejector pin pushes open the one-way valve, the gas in the gas cylinder is transported from the one-way valve to the outside of the pipe, and then is transported from the air inlet end of the gas valve to the air outlet end through the hollow inner cavity of the ejector pin.

[0034] According to an embodiment of the present invention, an adjusting handle is further provided on the gas valve, and the adjusting handle is used to adjust the gas output of the ejector pin.

[0035] According to an embodiment of the present invention, a heater is further provided. The heater includes a furnace body and a burner assembly connected to each other. The heater further includes a gas cylinder valve as mentioned in any of the above embodiments, and the burner assembly is communicated with the air outlet end of the gas valve.

[0036] The beneficial effects of this application are as follows:

[0037] By providing a sealing groove around the connecting slot and connecting a sealing sleeve in the sealing groove, the distance between the sealing sleeve and the interface end of the tank body is set to be less than the distance between the ejector pin and the one-way valve. Thus, when the tank body is tightened so that the distance between the tank body and the gas valve is shortened, the sealing sleeve can touch the interface end of the tank body earlier than the ejector pin, and a sealing structure between the gas valve and the tank body is formed before the ejector pin opens the one-way valve, improving the sealing performance of the valve, reducing the risk of gas leakage, and enhancing the safety of the valve during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present application will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0039] Figure 1 is a schematic structural diagram of the heater provided in the embodiment of the present application;

[0040] Figure 2 is a schematic internal structural diagram of the heater provided in the embodiment of the present application;

[0041] Figure 3 is a schematic internal structural diagram of the valve for the gas tank provided in the first embodiment of the present application;

[0042] Figure 4 is Figure 3 an enlarged view of area A in

[0043] Figure 5 is a schematic internal structural diagram of the valve for the gas tank provided in the second embodiment of the present application;

[0044] Figure 6 is Figure 5 an enlarged view of area B in

[0045] Figure 7 is a schematic structural diagram of the valve provided in the embodiment of the present application;

[0046] Figure 8 is a schematic structural diagram of one perspective of the sealing sleeve provided in the second embodiment of the present application;

[0047] Figure 9 is a schematic structural diagram of another perspective of the sealing sleeve provided in the second embodiment of the present application.

[0048] In the figure: 1. Tank body; 11. Connecting block; 12. Check valve; 13. Fitting groove; 14. Convex edge; 2. Air valve; 21. Intake end; 211. Connecting ring; 212. Connecting slot hole; 213. Thumb latch; 214. Sealing ring; 215. Sealing groove; 22. Exhaust end; 23. Adjusting handle; 3. Sealing sleeve; 31. Connecting surface; 32. Protruding part; 33. Fitting surface; 4. Furnace body; 41. Burner head; 42. Gas connection part; 43. Support cover; 5. Burner assembly; 6. Reflector; 7. Sealing screw sleeve. Detailed implementation manners

[0049] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and 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 thus should not be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0050] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be a mechanical connection, an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0051] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes that the first feature is directly above and obliquely above the second feature, or merely indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes that the first feature is directly below and obliquely below the second feature, or merely indicates that the horizontal height of the first feature is less than that of the second feature.

[0052] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0053] Embodiment 1

[0054] Please refer to Figures 1-4 , this embodiment provides a valve for a gas cylinder, and the valve for the gas cylinder will be specifically described below.

[0055] The valve for the gas cylinder includes a cylinder body 1 and a gas valve 2 connected in sequence. The cylinder body 1 is made of a metal material. The cylinder body 1 includes an inner cavity filled with fuel gas, and the pressure in the inner cavity is greater than the normal atmospheric pressure. The top of the cylinder body 1 is set as an interface end, and a mating groove 13 formed by the concave cylinder body 1 is provided on the interface end. A protruding connecting block 11 is provided in the middle of the mating groove 13. An external thread is provided on the outer peripheral surface of the connecting block 11. A vent hole is provided in the middle of the connecting block 11. The vent hole communicates the inner cavity of the cylinder body 1 with the connecting block 11. A one-way valve 12 is installed in the vent hole. Through the one-way valve 12, it can be ensured that the user can only fill gas into the inner cavity of the cylinder body 1 from outside the cylinder body 1, and the fuel gas cannot pass through the one-way valve 12 and the vent hole by the structure of the cylinder body 1 itself. When an external force is applied to the one-way valve 12, that is, when the one-way valve 12 is pressed, the one-way valve 12 is opened at this time, and the inner cavity of the cylinder body 1 is communicated with the external environment. The structure of the one-way valve 12 in the present application is basically the same as the structure existing in the prior art in the field, and is not the innovation point of this case, so it will not be elaborated here.

[0056] The described gas valve 2 includes an air inlet end 21 and an air outlet end 22. The air inlet end 21 is arranged at the bottom of the gas valve 2, and the air outlet end 22 is arranged at the top of the gas valve 2. A raised connecting ring 211 is arranged in the middle of the air inlet end 21. An internal thread is arranged on the inner circumferential surface of the connecting ring 211. The connecting ring 211 forms a threaded fit with the external thread of the connecting block 11 through the internal thread, so as to realize connecting the tank body 1 to the bottom of the gas valve 2.

[0057] The air inlet end 21 further includes a connecting groove hole 212 formed by enclosing the connecting ring 211. A sealing ring 214 is arranged in the connecting groove hole 212. The outer diameter of the sealing ring 214 is set to be equal to the inner diameter of the connecting ring 211. When the connecting block 11 rotates through the thread to shorten the distance from the gas valve 2, the connecting block 11 and the connecting groove hole 212 come into contact with the sealing ring 214 respectively, so as to ensure a sealed connection between the connecting block 11 and the connecting ring 211 and have good sealing performance, preventing gas from leaking from the connection gap between the connecting block 11 and the connecting ring 211.

[0058] A thimble 213 is connected to the center position of the groove surface of the connecting groove hole 212. The projection of the thimble 213 on the connecting block 11 just falls within the range of the one-way valve 12, and the diameter of the thimble 213 is set to be smaller than the diameter of the one-way valve 12. Further, the thimble 213 is of a hollow structure, and a hollow inner cavity along the axial direction is opened inside the thimble 213. The thimble 213 extends into the interior of the gas valve 2 and communicates the air inlet end 21 and the air outlet end 22. When the tank body 1 rotates through the thread to shorten the distance from the gas valve 2, the thimble 213 also shortens the distance from the one-way valve 12 until the thimble 213 touches the one-way valve 12. When the distance is further shortened, the thimble 213 applies a force to the one-way valve 12 and presses the one-way valve 12 towards the inner cavity of the gas tank. At the same time, a sealed connection is also formed between the connecting block 11, the connecting groove hole 212 and the sealing ring 214. At this time, the one-way valve 12 opens, and the gas in the inner cavity of the gas tank enters the connecting groove hole 212 through the one-way valve 12, and the sealing structure formed by the sealing ring 214 ensures that it does not leak or leaks as little as possible. The gas reaching the connecting groove hole 212 then enters the inner cavity of the thimble 213 and reaches the air outlet end 22 from the air inlet end 21 through the inner cavity of the thimble 213.

[0059] Further, the gas valve 2 includes a side surface located between the air outlet end 22 and the air inlet end 21. A regulating handle 23 is connected to the side surface of the gas valve 2. The regulating handle 23 extends into the interior of the gas valve 2 and is used to adjust the cross-sectional area of the inner cavity of the thimble 213, thereby controlling the flow rate of the gas in the inner cavity of the thimble 213, and further controlling the air output volume of the air outlet end 22. The structure of the regulating handle 23 in this application belongs to a common structure in the prior art and is not an innovation point of this application, so it will not be elaborated here.

[0060] Preferably, a sealing groove 215 is further provided on the air inlet end 21 of the gas valve 2. The sealing groove 215 is arranged on the periphery of the connecting ring 211. A sealing sleeve 3 is fixedly connected in the sealing groove 215. The projection of the sealing sleeve 3 on the tank body 1 falls within the range of the mating groove 13. The height of the sealing sleeve 3 is set as L1, the height of the connecting block 11 is set as L2, and the length of the part of the thimble 213 protruding from the air inlet end 21 is L3, and L1 > L2 + L3; that is, when the tank body 1 and the gas valve 2 are not tightened, the distance between the sealing sleeve 3 and the mating groove 13 is set to be less than the distance between the thimble 213 and the one-way valve 12; the outer diameter of the end of the sealing sleeve 3 away from the air inlet end 21 is less than or equal to the inner diameter of the interface end of the tank body 1; when the tank body 1 rotates through the thread to shorten the distance from the gas valve 2, the sealing sleeve 3 contacts the tank body 1 before the thimble 213; after the sealing sleeve 3 has touched the mating groove 13 and formed a sealed connection with the mating groove 13, the thimble 213 touches the one-way valve 12, thereby opening the one-way valve 12, so as to ensure that a sealed connection has been formed between the gas valve 2 and the tank body 1 when the gas is output from the one-way valve 12, thereby preventing the gas from leaking.

[0061] Because there is a problem of low machining accuracy at the present stage, it often occurs that when the thimble 213 has opened the one-way valve 12, the connecting block 11 has not yet contacted the sealing ring 214, resulting in gas leakage from the connection between the connecting block 11 and the connecting ring 211. The provision of the sealing sleeve 3 can form a sealing structure before the one-way valve 12 is opened, thereby preventing gas leakage and improving the safety of the valve for the gas cylinder during use.

[0062] Embodiment 2

[0063] Please refer to Figures 5-9 , this embodiment is based on the foregoing embodiment and provides another embodiment.

[0064] The structure and content of the valve for the gas cylinder provided in this embodiment are basically the same as those of the valve for the gas cylinder in the above-mentioned embodiment 1. The difference lies only in that in this embodiment, a sealing groove 215 is also provided on the air inlet end 21, and the sealing sleeve 3 is fixedly connected within the sealing groove 215; specifically, a circular connecting surface 31 is provided at the top of the sealing sleeve 3, and the connecting surface 31 is fitted and fixedly connected with the sealing groove 215. The fixed connection is achieved by gluing or screw connection, etc. The projection of the sealing sleeve 3 on the tank body 1 also falls within the range of the fitting groove 13. A raised portion 32 is provided at the bottom of the sealing sleeve 3, and a mating surface 33 is provided between the raised portion 32 and the outer edge of the sealing sleeve 3. The mating surface 33 is a circular arc surface, and the mating surface 33 is arranged to be concave towards the inside of the sealing sleeve 3.

[0065] Furthermore, the interface end of the tank body 1 further includes a convex edge 14 formed by the raised tank body 1. The convex edge 14 is provided at the outermost periphery of the interface end of the tank body 1, and the convex edge 14 is adjacent to the fitting groove 13 and is located outside the fitting groove 13. The height from the mating surface 33 to the sealing groove 215 is set as L1, the height of the convex edge 14 protruding from the interface end is set as L2, the height of the connecting block 11 is set as L3, and the length of the part where the ejector pin 213 protrudes from the air inlet end 21 is L4. L1 + L2 > L3 + L4; the outer diameter of the end of the sealing sleeve 3 away from the air inlet end 21 is less than or equal to the inner diameter of the interface end of the tank body 1; that is, when the tank body 1 and the gas valve 2 are not tightened, the distance between the sealing sleeve 3 and the convex edge 14 is set to be less than the distance between the ejector pin 213 and the one-way valve 12; when the tank body 1 is rotated through the thread to shorten the distance from the gas valve 2, the sealing sleeve 3 contacts the tank body 1 prior to the ejector pin 213; specifically, the mating surface 33 of the sealing sleeve 3 contacts the convex edge 14 to form a sealing structure; after the sealing sleeve 3 has touched the convex edge 14 and formed a sealed connection with the fitting groove 13, the ejector pin 213 touches the one-way valve 12, thereby opening the one-way valve 12, so as to ensure that a sealed connection has been formed between the gas valve 2 and the tank body 1 when the gas is output from the one-way valve 12, thereby preventing the leakage of gas.

[0066] The rest of the content in this embodiment is the same as that in the above-mentioned embodiment.

[0067] Embodiment 3

[0068] Please refer to Figures 1-9 , this embodiment provides another embodiment based on the foregoing embodiment.

[0069] A sealing screw sleeve 7 is provided between the connecting ring 211 and the connecting block 11. The sealing screw sleeve 7 includes an external thread provided on the outer peripheral surface and an internal thread provided on the inner peripheral surface. The sealing screw sleeve 7 cooperatively connects the connecting block 11 and the connecting ring 211 in a threaded connection manner, and further improves the sealing performance between the connecting block 11 and the connecting ring 211.

[0070] The remaining content in this embodiment is the same as that in the above-mentioned embodiment.

[0071] Embodiment 4

[0072] Please refer to Figures 1-9 , this embodiment provides another embodiment based on the foregoing embodiment.

[0073] In this embodiment, a heater is provided.

[0074] The heater includes a furnace body 4, a burner head assembly 5 and a gas cylinder valve. The gas cylinder valve mentioned in this embodiment is the gas cylinder valve described in Embodiments 1 to 3.

[0075] The furnace body 4 includes a burner head 41 and a gas connection part 42. The burner head 41 is fixedly connected to the top of the gas connection part 42. An ignition device is provided in the burner head 41. The burner head 41 mentioned in this embodiment has the same structure as that in the prior art and is not an innovation point of this application, so it will not be elaborated here. The gas connection part 42 is provided as a cylindrical shell. There is an opening below the gas connection part 42. The upper part of the gas connection part 42 is enclosed and connected to the burner head 41. The inside of the gas connection part 42 is used to connect and accommodate the gas cylinder valve; the burner head assembly 5 is arranged in the furnace body 4 and penetrates through the furnace body 4. One end of the burner head assembly 5 is connected to the burner head 41, and the other end of the burner head assembly 5 is connected to the gas outlet end 22 of the gas valve 2 of the gas cylinder valve.

[0076] A support cover 43 is connected to the outside of the burner head 41. The support cover 43 can be used to separate the burner head 41 to ensure the safe use of the product; it can also be used to place the object to be heated to realize the function of heating the object. The structure of the support cover 43 is the same as that in the prior art, so it will not be elaborated here either.

[0077] Preferably, a reflector 6 is further provided between the burner head 41 and the gas connection part 42. The reflector 6 is used to block the heat of the burner head 41 from directly radiating to the gas outlet end 22 of the gas cylinder valve, and allows the heat around the burner head assembly 5 to radiate to the surrounding position of the gas outlet end 22 of the gas cylinder valve and heat the gas cylinder valve.

[0078] The heat generated by the burner head assembly 5 is radiated by the reflector 6 to the periphery of the gas outlet end 22 of the valve for the gas cylinder and blocks the direct radiation to the gas outlet end 22, making the fuel in the valve for the gas cylinder more fully utilized, avoiding the problem of waste caused by the condensation of the gas in the valve for the gas cylinder due to the low temperature inside the valve for the gas cylinder, effectively improving the utilization rate of the gas, and is particularly applicable to areas with low air pressure such as plateaus.

[0079] In this embodiment, the reflector 6 adopts a structure that already exists in the prior art, so it will not be elaborated here.

[0080] The above embodiments can be arbitrarily combined with each other.

[0081] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A valve for a gas cylinder, comprising a gas valve (2) connected to the gas cylinder body (1); A check valve (12) is provided at the interface end of the cylinder body (1); A connecting groove hole (212) in threaded fit with the interface end of the cylinder body (1) is provided at the air inlet end (21) of the gas valve (2); A thimble (213) is provided in the connecting groove hole (212); It is characterized in that An annular sealing sleeve (3) is further provided on the air inlet end (21); the outer diameter of one end of the sealing sleeve (3) far from the air inlet end (21) is less than or equal to the inner diameter of the interface end of the cylinder body (1); When the cylinder body (1) is screwed with the gas valve (2), the end of the sealing sleeve (3) far from the air inlet end (21) contacts the interface end of the cylinder body (1) prior to the thimble (213); The air inlet end (21) further includes a connecting ring (211) for enclosing to form the connecting groove hole (212); a mating groove (13) is further provided at the interface end of the cylinder body (1), and the mating groove (13) is annular and is arranged outside the check valve (12); the projection of the sealing sleeve (3) on the cylinder body (1) falls into the mating groove (13); A sealing groove (215) is provided on the periphery of the connecting ring (211), and the sealing sleeve (3) is fixedly connected in the sealing groove (215); The end of the sealing sleeve (3) far from the air inlet end (21) can contact and be sealingly connected to the mating groove (13); when the cylinder body (1) and the gas valve (2) are not screwed together, the distance between the sealing sleeve (3) and the mating groove (13) is less than the distance between the thimble (213) and the check valve (12); A sealing ring (214) is provided in the connecting groove hole (212), and the sealing ring (214) is used to improve the sealing performance between the cylinder body (1) and the connecting groove hole (212).

2. The valve for a gas cylinder according to claim 1, characterized in that The interface end of the cylinder body (1) further includes a connecting block (11), and the check valve (12) is arranged in the connecting block (11); External threads are provided on the outer peripheral surface of the connecting block (11), and the cylinder body (1) is in threaded fit with the connecting groove hole (212) through the connecting block (11).

3. The valve for a gas cylinder according to claim 1, characterized in that The projection of the thimble (213) on the cylinder body (1) falls within the range of the check valve (12); The thimble (213) is of a hollow structure and communicates the air inlet end (21) and the air outlet end (22) of the gas valve (2); The thimble (213) is used to push open the check valve (12), so that the gas in the cylinder body (1) is transported outside the cylinder body (1) through the check valve (12).

4. The valve for a gas cylinder according to claim 3, characterized in that An adjusting handle (23) is further provided on the gas valve (2), and the adjusting handle (23) is used to adjust the gas outlet volume of the thimble (213).

5. A heater, comprising a furnace body (4) and a burner assembly (5) connected to each other, characterized in that It further includes a valve for a gas cylinder as described in any one of claims 1-4, and the burner head assembly (5) is in communication with the gas outlet end (22) of the gas valve (2).

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