Alcohol-based liquid fuel steel cylinder valve

Abstract

The utility model relates to the technical field of valves, and discloses an alcohol-based liquid fuel steel cylinder valve which comprises a valve body, a hand wheel assembly, a valve rod, a sealing piece and a valve assembly, a valve cavity is formed in the valve body, a liquid inlet port communicated with the valve cavity is formed in the bottom of the valve body, a liquid outlet port communicated with the valve cavity is formed in one side of the valve body, and a valve rod is arranged in the valve cavity. The inner wall of the liquid inlet port is in threaded connection with a liquid suction pipe, the outer wall of the liquid inlet port is provided with an external thread used for being connected with a steel cylinder, the inner wall of the liquid outlet port is provided with an internal thread used for being connected with a pipe, and the hand wheel assembly can drive the valve assembly to move up and down along the valve cavity through the valve rod; the alcohol-based liquid fuel steel cylinder has the effect of being specially suitable for alcohol-based liquid fuel steel cylinders.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve for an alcohol-based liquid fuel cylinder. Background Art

[0002] Alcohol-based fuel is a fuel mainly composed of alcohols (such as methanol, ethanol, butanol, etc.); it is a kind of biomass energy, and like nuclear energy, solar energy, wind energy, and hydropower, it is an environmentally friendly clean energy vigorously promoted by governments of various countries; in the face of the depletion of petrochemical energy, alcohol-based fuel is the most promising new alternative energy source and is deeply favored by enterprises and organizations in various countries; alcohol-based fuel is mainly used in catering and industrial boilers.

[0003] At present, civil alcohol-based liquid fuels are in the primary stage of use in China, and there are no relevant national usage specifications and standards. Alcohol-based liquid fuels for burning in stoves for residential, commercial and collective users are mainly delivered to end users in the form of steel cylinders; however, steel cylinders require cylinder valves, and there are currently no valves specifically suitable for alcohol-based liquid fuel cylinders. Utility Model Content

[0004] The utility model aims to provide a valve for an alcohol-based liquid fuel cylinder, which has the effect of being specially suitable for the alcohol-based liquid fuel cylinder.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions: comprising a valve body, a handwheel assembly, a valve stem, a sealing member and a valve assembly, wherein a valve cavity is arranged in the valve body, a liquid inlet port communicating with the valve cavity is arranged at the bottom of the valve body, a liquid outlet port communicating with the valve cavity is arranged on one side of the valve body, a liquid suction tube is threadedly connected to the inner wall of the liquid inlet port, an outer thread for connecting a steel cylinder is provided on the outer wall of the liquid inlet port, an inner thread for connecting a pipette is provided on the inner wall of the liquid outlet port, a thread matching with the valve assembly is arranged in the valve cavity, the handwheel assembly can drive the valve assembly to move up and down along the valve cavity through the valve stem, when the valve assembly abuts against the top of the valve cavity, the liquid inlet port and the liquid outlet port are in a communicating state, when the valve assembly abuts against the bottom of the valve cavity, the liquid inlet port and the liquid outlet port are in a disconnected state, and the sealing member is used to connect the valve stem and the valve body.

[0006] The utility model is further configured as follows: the handwheel assembly includes a handwheel, a clamping spring and a fixing nut, a first connecting groove is provided on the top of the handwheel, a second connecting groove with a polygonal cross section communicating with the first connecting groove is provided on the bottom of the handwheel, a first connecting chamber and a second connecting chamber are further provided in the valve body, the top of the valve chamber is communicated with the second connecting chamber, the valve stem includes, from top to bottom, a first connecting portion located in the first connecting groove, a second connecting portion movably fitted to the inner wall of the second connecting groove, a third connecting portion connected to the sealing member and a fourth connecting portion movably fitted to the first connecting chamber, the fixing nut is threadedly connected to the top of the first connecting portion, the first connecting portion movably passes through the clamping spring, the two ends of the clamping spring respectively abut against the fixing nut and the handwheel, a connecting block with a polygonal cross section is movably provided in the valve body, a first moving groove matching with the connecting block is provided at the bottom of the fourth connecting portion, and a second moving groove matching with the connecting block is provided at the top of the valve assembly.

[0007] The utility model is further configured as follows: the valve assembly includes a valve block and an elastic valve pad, the outer wall of the valve block is threadedly connected to the inner wall of the valve cavity, the second movable groove is located on the valve block, a matching groove is provided at the bottom of the valve block, the elastic valve pad is engaged with the matching groove, the height of the elastic valve pad is not less than the depth of the matching groove, and the cross-sectional area of ​​the elastic valve pad is larger than the opening area of ​​the top end of the liquid inlet port.

[0008] The utility model is further configured as follows: a third moving groove connected to the second moving groove is provided on the top of the elastic valve pad, and the bottom end of the connecting block is engaged with the third moving groove.

[0009] The utility model is further configured as follows: the sealing member comprises a first sealing portion threadedly connected to the top of the valve body, a second sealing portion movably fitted to the top of the valve body, and a third sealing portion movably fitted to the outer wall of the third connecting portion, the radius of the fourth connecting portion is greater than the radius of the third connecting portion, a first sealing ring is arranged at the top of the valve body, the bottom of the second sealing portion can abut against the first sealing ring, an annular sealing groove is provided on the inner wall of the third sealing portion, a second sealing ring is arranged in the sealing groove, and the outer wall of the third connecting portion abuts against the second sealing ring.

[0010] The utility model is further configured as follows: a first wear-resistant gasket is movably arranged in the first connecting cavity, and two sides of the first elastic gasket respectively abut against the top of the fourth connecting portion and the bottom of the first sealing ring.

[0011] The utility model is further configured as follows: an outer wall of the valve body is provided with a circular limiting block, and when the bottom of the first sealing portion abuts against the limiting block, the second sealing portion abuts against the first sealing ring.

[0012] The utility model is further configured as follows: a cover plate which is clamped or threadedly connected to the inner wall of the first connecting groove is provided on the top of the hand wheel, and the top end of the fixing nut is movably fitted to the cover plate.

[0013] The utility model is further configured as follows: a second annular wear-resistant gasket is provided at the top end of the third sealing portion, and the bottom end of the hand wheel abuts against the second wear-resistant gasket.

[0014] The utility model is further configured as follows: the cross section of the connecting block is a rectangle.

[0015] The beneficial effects of the utility model are:

[0016] 1. By setting the liquid inlet port, liquid outlet port, etc., the connection with the cylinder, the liquid suction tube and the pipe is realized, so it is specially suitable for the connection with the alcohol-based liquid fuel cylinder; at the same time, by setting the handwheel assembly and the valve stem to drive the valve assembly to move up and down in the valve cavity, the valve is opened and closed, the sealing element connects the valve stem and the valve body, and seals the valve stems to avoid leakage.

[0017] 2. By setting a fixing nut, a compression spring, etc., the fixing nut is fixedly connected to the top of the valve stem, and the compression spring is compressed between the handwheel and the fixing nut. The compression spring applies a downward elastic force to the handwheel, so that the handwheel is always close to the seal; when the handwheel is turned, the polygonal second connecting groove and the matching second connecting part drive the valve stem to rotate synchronously as a whole, and the valve stem drives the valve assembly to rotate synchronously through the first moving groove, the second moving groove and the connecting block, so that the valve assembly moves up and down in the valve cavity to realize the opening and closing of the valve.

[0018] 3. By setting an elastic valve pad, a third movable groove, etc., the elastic valve pad is engaged in the matching groove, and the bottom end of the connecting block is engaged in the third movable groove, thereby ensuring that the elastic valve pad moves synchronously with the valve block. At the same time, the thickness of the elastic valve pad is not less than the depth of the matching groove. Therefore, when the valve block contacts the bottom of the valve cavity, the elastic valve pad contacts the connection between the liquid inlet port and the valve body. Through the elastic compression of the elastic valve pad, the top of the liquid inlet port is ensured to be completely sealed, thereby ensuring that the valve is in a closed state.

[0019] 4. By setting the first wear-resistant gasket so that its two sides respectively contact the first sealing ring and the fourth connecting part, the sealing effect of the first sealing ring can be ensured. At the same time, when the hand wheel is turned, the valve stem rotates with the hand wheel. At this time, the fourth connecting part on the valve stem rotates around the first wear-resistant gasket, thereby avoiding friction between the fourth connecting part and the first sealing ring, which affects the service life of the first sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 This is a structural schematic diagram of an embodiment of a valve for an alcohol-based liquid fuel cylinder of the utility model;

[0022] Figure 2 yes Figure 1 A is an enlarged schematic diagram;

[0023] Figure 3 yes Figure 1 A magnified schematic diagram of B;

[0024] Figure 4 yes Figure 1 A magnified schematic diagram of C in the middle.

[0025] In the figure, 1, valve body; 2, hand wheel assembly; 2a, hand wheel; 2b, compression spring; 2c, fixing nut; 3, valve stem; 3a, first connecting part; 3b, second connecting part; 3c, third connecting part; 3d, fourth connecting part; 4, sealing member; 4a, first sealing part; 4b, second sealing part; 4c, third sealing part; 5, valve assembly; 5a, valve block; 5b, elastic valve pad; 6, valve cavity; 7, liquid inlet port; 8. Liquid outlet port; 9. First connecting groove; 10. Second connecting groove; 11. First connecting cavity; 12. Second connecting cavity; 13. Connecting block; 14. First movable groove; 15. Second movable groove; 16. Matching groove; 17. Third movable groove; 18. First sealing ring; 19. Sealing groove; 20. Second sealing ring; 21. First wear-resistant gasket; 22. Limiting block; 23. Cover plate; 24. Second wear-resistant gasket; 25. Liquid suction tube. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with specific embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] The utility model provides a valve for an alcohol-based liquid fuel cylinder. Figures 1 to 4 As shown, it comprises a valve body 1, a handwheel assembly 2, a valve stem 3, a sealing member 4 and a valve assembly 5, wherein a valve cavity 6 is arranged in the valve body 1, a liquid inlet port 7 communicating with the valve cavity 6 is arranged at the bottom of the valve body 1, a liquid outlet port 8 communicating with the valve cavity 6 is arranged on one side of the valve body 1, a liquid inlet port 7 is threadedly connected with a liquid suction tube 25 on the inner wall thereof, an outer wall of the liquid inlet port 7 is provided with an outer thread for connecting to a steel cylinder, an inner wall of the liquid outlet port 8 is provided with an inner thread for connecting to a pipe, and the valve cavity 6 is provided with a sealing member 4 and a sealing member 5. A thread matching the valve assembly 5 is provided in the door cavity 6. The handwheel assembly 2 can drive the valve assembly 5 to move up and down along the valve cavity 6 through the valve stem 3. When the valve assembly 5 abuts against the top of the valve cavity 6, the liquid inlet port 7 and the liquid outlet port 8 are in a connected state. When the valve assembly 5 abuts against the bottom of the valve cavity 6, the liquid inlet port 7 and the liquid outlet port 8 are in a disconnected state. The sealing member 4 is used to connect the valve stem 3 and the valve body 1.

[0028] Further, the handwheel assembly 2 includes a handwheel 2a, a compression spring 2b and a fixing nut 2c, the top of the handwheel 2a is provided with a first connecting groove 9, the bottom of the handwheel 2a is provided with a second connecting groove 10 with a polygonal cross section connected to the first connecting groove 9, the valve body 1 is further provided with a first connecting chamber 11 and a second connecting chamber 12, the top of the valve chamber 6 is connected to the second connecting chamber 12, and the valve stem 3 includes, from top to bottom, a first connecting portion 3a located in the first connecting groove 9, a second connecting portion 3b movably attached to the inner wall of the second connecting groove 10, and a connecting portion 3a connected to the sealing member 4. The third connecting part 3c and the fourth connecting part 3d movably fitted in the first connecting cavity 11, the fixing nut 2c is threadedly connected to the top of the first connecting part 3a, the first connecting part 3a movably passes through the clamping spring 2b, and the two ends of the clamping spring 2b respectively abut against the fixing nut 2c and the handwheel 2a, a connecting block 13 with a polygonal cross section is movably arranged in the valve body 1, the bottom of the fourth connecting part 3d is provided with a first movable groove 14 matched with the connecting block 13, and the top of the valve assembly 5 is provided with a second movable groove 15 matched with the connecting block 13.

[0029] Furthermore, the valve assembly 5 includes a valve block 5a and an elastic valve pad 5b, the outer wall of the valve block 5a is threadedly connected to the inner wall of the valve cavity 6, the second movable groove 15 is located on the valve block 5a, and a matching groove 16 is provided at the bottom of the valve block 5a. The elastic valve pad 5b is engaged with the matching groove 16, the height of the elastic valve pad 5b is not less than the depth of the matching groove 16, and the cross-sectional area of ​​the elastic valve pad 5b is larger than the opening area of ​​the top of the liquid inlet port 7.

[0030] Furthermore, a third moving groove 17 communicating with the second moving groove 15 is formed on the top of the elastic valve pad 5 b , and the bottom end of the connecting block 13 is engaged with the third moving groove 17 .

[0031] Furthermore, the sealing member 4 includes a first sealing portion 4a threadedly connected to the top of the valve body 1, a second sealing portion 4b movably fitted to the top of the valve body 1, and a third sealing portion 4c movably fitted to the outer wall of the third connecting portion 3c, the radius of the fourth connecting portion 3d is greater than the radius of the third connecting portion 3c, a first sealing ring 18 is provided at the top of the valve body 1, the bottom of the second sealing portion 4b can abut against the first sealing ring 18, a circular sealing groove 19 is provided on the inner wall of the third sealing portion 4c, a second sealing ring 20 is provided in the sealing groove 19, and the outer wall of the third connecting portion 3c abuts against the second sealing ring 20.

[0032] Furthermore, a first wear-resistant gasket 21 is movably disposed in the first connecting cavity 11 , and two sides of the first elastic gasket respectively abut against the top of the fourth connecting portion 3 d and the bottom of the first sealing ring 18 .

[0033] Furthermore, a circular limiting block 22 is disposed on the outer wall of the valve body 1 . When the bottom of the first sealing portion 4 a contacts the limiting block 22 , the second sealing portion 4 b contacts the first sealing ring 18 .

[0034] Furthermore, a cover plate 23 is provided on the top of the hand wheel 2 a and is snap-fitted or threadedly connected to the inner wall of the first connecting groove 9 , and the top end of the fixing nut 2 c is movably fitted to the cover plate 23 .

[0035] Furthermore, a second annular wear-resistant gasket 24 is disposed at the top end of the third sealing portion 4 c , and the bottom end of the hand wheel 2 a contacts the second wear-resistant gasket 24 .

[0036] Furthermore, the cross section of the connecting block 13 is rectangular.

[0037] When it is necessary to connect the alcohol-based liquid fuel cylinder, firstly, the liquid suction tube 25 is threadedly connected to the inner wall of the liquid inlet port 7, the liquid suction tube 25 is placed in the cylinder, and then the cylinder is threadedly connected to the outer wall of the liquid inlet port 7, and the pipe is threadedly connected to the inner wall of the liquid outlet port 8; when it is necessary to open the valve, the hand wheel 2a is turned to drive the valve stem 3 to rotate synchronously, the valve stem 3 drives the connecting block 13 to rotate synchronously through the first moving groove 14, and the connecting block 13 then drives the valve block 5a and the elastic valve gasket 5b to rotate through the second moving groove 15 and the third moving groove 17. It is threadedly connected to the inner wall of the valve chamber 6, so the valve block 5a will rise along the valve chamber 6 during rotation until the valve block 5a hits the top of the valve chamber 6. At this time, the hand wheel 2a cannot be rotated further and the valve is in a connected state; by setting the liquid inlet port 7, the liquid outlet port 8, etc., the connection with the cylinder, the suction tube 25 and the pipe is achieved, so that it is specifically suitable for connection with the alcohol-based liquid fuel cylinder; at the same time, by setting the hand wheel 2a, the valve stem 3 and the connecting block 13, etc., the valve assembly 5 is driven to move up and down in the valve chamber 6, thereby realizing the opening and closing of the valve.

[0038] By setting a fixing nut 2c, a compression spring, etc., the fixing nut 2c is fixedly connected to the top of the valve stem 3, and the compression spring 2b is compressed between the handwheel 2a and the fixing nut 2c. The compression spring 2b applies a downward elastic force to the handwheel 2a, so that the handwheel 2a is always close to the sealing member 4; when the handwheel 2a is rotated, the valve stem 3 is driven to rotate synchronously as a whole through the polygonal second connecting groove 10 and the matching second connecting portion 3b, and the valve stem 3 drives the valve assembly 5 to rotate synchronously through the first moving groove 14, the second moving groove 15 and the connecting block 13, so that the valve assembly 5 moves up and down in the valve cavity 6 to realize the opening and closing of the valve.

[0039] By setting an elastic valve pad 5b, a third movable groove 17, etc., the elastic valve pad 5b is engaged in the matching groove 16, and the bottom end of the connecting block 13 is engaged in the third movable groove 17, thereby ensuring that the elastic valve pad 5b moves synchronously with the valve block 5a. At the same time, the thickness of the elastic valve pad 5b is not less than the depth of the matching groove 16. Therefore, when the valve block 5a contacts the bottom of the valve cavity 6, the elastic valve pad 5b contacts the connection between the liquid inlet port 7 and the valve body 1. Through the elastic compression of the elastic valve pad 5b, it is ensured that the top of the liquid inlet port 7 is completely sealed, thereby ensuring that the valve is in a closed state.

[0040] By setting the first wear-resistant gasket 21 so that its two sides respectively contact the first sealing ring 18 and the fourth connecting portion 3d, the sealing effect of the first sealing ring 18 can be ensured. At the same time, when the hand wheel 2a is turned, the valve stem 3 rotates with the hand wheel 2a. At this time, the fourth connecting portion 3d on the valve stem 3 rotates around the first wear-resistant gasket 21, thereby avoiding friction between the fourth connecting portion 3d and the first sealing ring 18, which affects the service life of the first sealing ring 18.

[0041] By providing the second wear-resistant washer 24, the bottom end of the handwheel 2a contacts the second wear-resistant washer 24. Therefore, when the handwheel 2a is rotated, the handwheel 2a rotates around the second wear-resistant washer 24, thereby avoiding relative friction between the handwheel 2a and the third sealing portion 4c of the seal 4, thereby extending the service life of the valve.

[0042] By setting the limit block 22, when it is necessary to connect the seal 4 and the valve body 1, the first sealing part 4a is rotated until the first sealing part 4a contacts the limit block 22. At this time, the second sealing part 4b also presses the first sealing ring 18 into the valve body 1. Therefore, by setting the limit block 22, it is ensured that the first sealing ring 18 is tightly connected with the valve body 1 and the seal 4, thereby ensuring the sealing effect of the first sealing ring 18.

[0043] By providing the cover plate 23 , on the one hand, the cover plate 23 is easy to install and replace, and valve related information can be printed on the cover plate 23 ; on the other hand, the cover plate 23 can prevent dust and other debris from entering the first connecting groove 9 to avoid affecting the rotation of the valve stem 3 .

[0044] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0045] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. An alcohol-based liquid fuel cylinder valve, characterized in that: The invention comprises a valve body (1), a hand wheel assembly (2), a valve stem (3), a sealing member (4) and a valve assembly (5); a valve cavity (6) is arranged in the valve body (1); a liquid inlet port (7) communicating with the valve cavity (6) is arranged at the bottom of the valve body (1); a liquid outlet port (8) communicating with the valve cavity (6) is arranged on one side of the valve body (1); a liquid suction pipe (25) is threadedly connected to the inner wall of the liquid inlet port (7); an outer thread for connecting to a steel cylinder is provided on the outer wall of the liquid inlet port (7); an inner thread for connecting to a pipette is provided on the inner wall of the liquid outlet port (8); and the valve cavity (1) is provided with a plurality of inner threads for connecting to a plurality of inner threads. (6) is provided with a thread matching with the valve assembly (5), and the handwheel assembly (2) can drive the valve assembly (5) to move up and down along the valve cavity (6) through the valve stem (3). When the valve assembly (5) abuts against the top of the valve cavity (6), the liquid inlet port (7) and the liquid outlet port (8) are in a connected state. When the valve assembly (5) abuts against the bottom of the valve cavity (6), the liquid inlet port (7) and the liquid outlet port (8) are in a disconnected state. The sealing member (4) is used to connect the valve stem (3) and the valve body (1).

2. The alcohol-based liquid fuel cylinder valve according to claim 1, characterized in that: The handwheel assembly (2) comprises a handwheel (2a), a compression spring (2b) and a fixing nut (2c); a first connecting groove (9) is provided at the top of the handwheel (2a); a second connecting groove (10) with a polygonal cross section and communicating with the first connecting groove (9) is provided at the bottom of the handwheel (2a); a first connecting chamber (11) and a second connecting chamber (12) are also provided in the valve body (1); the top of the valve chamber (6) is communicated with the second connecting chamber (12); the valve stem (3) comprises, from top to bottom, a first connecting portion (3a) located in the first connecting groove (9), a second connecting portion (3b) movably fitted to the inner wall of the second connecting groove (10), a second connecting portion (3b) connected to the sealing member (4); The valve body (1) comprises a third connecting portion (3c) connected to the valve body (1) and a fourth connecting portion (3d) movably fitted in the first connecting cavity (11); the fixing nut (2c) is threadedly connected to the top of the first connecting portion (3a); the first connecting portion (3a) movably passes through the clamping spring (2b); the two ends of the clamping spring (2b) respectively abut against the fixing nut (2c) and the hand wheel (2a); a connecting block (13) with a polygonal cross section is movably arranged in the valve body (1); a first movable groove (14) matching with the connecting block (13) is provided at the bottom of the fourth connecting portion (3d); and a second movable groove (15) matching with the connecting block (13) is provided at the top of the valve assembly (5).

3. The alcohol-based liquid fuel cylinder valve according to claim 2, characterized in that: The valve assembly (5) comprises a valve block (5a) and an elastic valve pad (5b), the outer wall of the valve block (5a) is threadedly connected to the inner wall of the valve cavity (6), the second movable groove (15) is located on the valve block (5a), a matching groove (16) is provided at the bottom of the valve block (5a), the elastic valve pad (5b) is engaged with the matching groove (16), the height of the elastic valve pad (5b) is not less than the depth of the matching groove (16), and the cross-sectional area of ​​the elastic valve pad (5b) is larger than the opening area of ​​the top end of the liquid inlet port (7).

4. The alcohol-based liquid fuel cylinder valve according to claim 3, characterized in that: A third movable groove (17) communicating with the second movable groove (15) is provided on the top of the elastic valve pad (5b), and the bottom end of the connecting block (13) is engaged with the third movable groove (17).

5. The alcohol-based liquid fuel cylinder valve according to claim 2, characterized in that: The sealing member (4) comprises a first sealing portion (4a) threadedly connected to the top of the valve body (1), a second sealing portion (4b) movably fitted to the top of the valve body (1), and a third sealing portion (4c) movably fitted to the outer wall of the third connecting portion (3c), the radius of the fourth connecting portion (3d) is greater than the radius of the third connecting portion (3c), a first sealing ring (18) is arranged at the top of the valve body (1), the bottom of the second sealing portion (4b) can abut against the first sealing ring (18), an annular sealing groove (19) is provided on the inner wall of the third sealing portion (4c), a second sealing ring (20) is arranged in the sealing groove (19), and the outer wall of the third connecting portion (3c) abuts against the second sealing ring (20).

6. The alcohol-based liquid fuel cylinder valve according to claim 5, characterized in that: A first wear-resistant gasket (21) is movably arranged in the first connecting cavity (11), and two sides of the first wear-resistant gasket (21) respectively abut against the top of the fourth connecting portion (3d) and the bottom of the first sealing ring (18).

7. The alcohol-based liquid fuel cylinder valve according to claim 6, characterized in that: The outer wall of the valve body (1) is provided with a circular limit block (22), and when the bottom of the first sealing portion (4a) contacts the limit block (22), the second sealing portion (4b) contacts the first sealing ring (18).

8. The alcohol-based liquid fuel cylinder valve according to claim 2, characterized in that: A cover plate (23) is provided on the top of the hand wheel (2a) and is snap-fitted or threadedly connected to the inner wall of the first connecting groove (9), and the top end of the fixing nut (2c) is movably fitted to the cover plate (23).

9. The alcohol-based liquid fuel cylinder valve according to claim 5, characterized in that: A second annular wear-resistant gasket (24) is provided at the top end of the third sealing portion (4c), and the bottom end of the hand wheel (2a) abuts against the second wear-resistant gasket (24).

10. The alcohol-based liquid fuel cylinder valve according to claim 2, characterized in that: The cross section of the connecting block (13) is rectangular.

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