Three-in-one angle valve for liquid fuel storage

Abstract

The invention relates to the technical field of angle valves, and discloses a three-in-one angle valve for liquid fuel storage, which comprises an angle valve, an air outlet, a fuel channel and a fuel filling and output channel which are communicated with one another are arranged in the angle valve, and a mounting hole, a fuel output hole and a valve plug hole which are communicated with one another are arranged in a fuel tee joint; a sealing valve is mounted at the top in the angle valve, and an air channel is formed in the sealing valve; the valve rod is connected with the air valve plug and the fuel valve plug through connecting pieces, and the fuel valve plug penetrates through the sealing valve and then is located in the valve plug hole; a self-closing valve connector is installed in the normally-closed fixing nut, and an output butt joint is installed in the self-closing valve connector; and the oil filling pipe is communicated with the fuel channel. According to the angle valve, the fuel tee joint, the self-closing valve connector and the sealing valve are arranged in the angle valve, the valve rod is rotated to drive the air valve plug and the fuel valve plug to move synchronously, the problem of operating a plurality of valves and switches is simplified, errors and leakage risks are reduced, and safety and convenience are improved.

Description

Technical Field

[0001] The invention relates to the technical field of angle valves, in particular to a three-in-one angle valve for storing liquid fuel. Background Art

[0002] In recent years, gas explosion accidents have occurred frequently, which has attracted great attention from relevant departments and enterprises. Many places have begun to ban the use of gas, and places that still use gas have increasingly strict requirements for the specifications of cylinders. In order to cope with this situation, a variety of relatively safe and environmentally friendly alternative liquid fuels have appeared on the market. At the same time, the state has put forward strict safety standards for cylinders containing liquid fuels, requiring them to not generate pressure and to ensure safe use. This requirement has prompted cylinder manufacturers to continuously improve technology and standardize production, but most companies are still similar in appearance design, only manufactured according to national standards, and lack innovation.

[0003] The liquid fuel cylinders currently used in the market still have some shortcomings. When in use, the liquid fuel cylinder completely relies on the pump that comes with the stove to deliver the fuel to the stove or burner. An air self-closing valve is usually added to the cylinder to prevent leakage when the volatile liquid generates gas pressure. The air self-closing valve is in a normally closed state and will only open automatically when a certain gas pressure is generated. However, this design follows the idea of ​​the liquefied gas angle valve, but only installs a fuel pipe at one end inside the angle valve. The pipe must consider both filling and fuel output. In many occasions, the two cannot be compatible. Although it can prevent static electricity from being generated, it cannot adapt to all types of stoves, especially stoves with less suction, which may have the problem of insufficient fuel supply. In addition, the operation method of the existing design is relatively complicated. The user needs to manually open the air valve or switch installed on the upper part of the cylinder while opening the angle valve, otherwise the negative pressure inside the cylinder will not be able to extract the fuel. Although the normally closed valve and manual switch are set on the cylinder, this operation method makes users less adaptable, which brings many inconveniences and usage problems. Summary of the invention

[0004] In view of the above deficiencies in the prior art, the present invention provides a three-in-one angle valve for storing liquid fuel. The existing design is cumbersome to operate, cannot be adapted to all stove scene applications, and is prone to generating negative pressure and insufficient fuel supply during use.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: a three-in-one angle valve for storing liquid fuel, comprising: An angle valve, which is provided with interconnected air outlet, fuel channel and fuel filling and output channel, a fuel tee is installed in the middle of the angle valve, and the fuel tee is provided with interconnected mounting holes, fuel output holes and valve plug holes, a sealing valve is installed at the top of the angle valve, and an air channel is opened inside the sealing valve; The valve stem is located at the top of the angle valve and is connected to the air valve plug and the fuel valve plug through a connecting piece. The air valve plug is located in the air channel, and the fuel valve plug is located in the valve plug hole after passing through the sealing valve. A normally closed fixed nut, which is installed in the fuel filling and output channel and has a self-closing valve joint installed inside, and an output butt joint is installed inside the self-closing valve joint; The refueling pipe has an air through hole at its upper portion and an inner tube inside thereof. The refueling pipe is communicated with the fuel channel, and the inner tube is communicated with the mounting hole.

[0006] Preferably, a filter is installed at the bottom of the inner tube.

[0007] Preferably, a hand wheel is connected to the top of the valve stem, a valve cap is installed on the outside of the angle valve, a valve stem spring is installed on the top of the outer wall of the valve stem, and a pressure cap is installed on the top of the hand wheel.

[0008] Preferably, an air valve plug spring is installed on the outer wall of the air valve plug, and the air valve plug spring is located in the air channel. A valve plug sealing ring is fixedly connected to the middle and lower part of the outer wall of the fuel valve plug, and a fuel valve plug spring is provided at the bottom of the outer wall of the fuel valve plug, and the fuel valve plug spring is located in the valve plug hole.

[0009] Preferably, the connecting piece is at the bottom of the valve stem, and the bottom surface of the connecting piece is connected to a movable valve stem, a screw thread is provided on the outer wall of the movable valve stem, a fixing ring is threadedly connected to the outer wall of the movable valve stem, and the fixing ring is located at the inner bottom of the angle valve, and the bottom surface of the movable valve stem is rotatably connected to a movable meson, and the fuel valve plug and the air valve plug are respectively fixedly connected to the center and both sides of the bottom surface of the movable meson.

[0010] Preferably, an air connection hole is opened at the top of the refueling pipe, and a through hole is arranged in the middle, the inner tube is in the through hole, an anti-disassembly seat is installed at the inner top of the refueling pipe, a spring column is installed inside the anti-disassembly seat, and the spring column passes through the refueling pipe.

[0011] Preferably, a fuel inner pipe joint is installed at the inner bottom of the fuel tee, and the bottom of the fuel inner pipe joint passes through the middle of the anti-disassembly seat.

[0012] Preferably, the normally closed fixing nut and the angle valve and the self-closing valve joint and the normally closed fixing nut are sealed by a seal, the outer wall of the output joint and the self-closing valve joint are sealed by a self-closing valve sealing ring, a self-closing valve spring is provided on one side of the self-closing valve joint, and the self-closing valve spring is in contact with the interior of the angle valve.

[0013] Preferably, a sealing valve moving valve core is arranged below the moving meson, the fuel valve plug passes through the middle part of the sealing valve moving valve core, the bottom of the sealing valve moving valve core is sleeved with the outer wall of the valve plug hole, the bottom of the inner wall of the air channel is installed with a sealing valve nut, the top of the outer wall of the fuel tee is sleeved with a sealing valve spring, and the top of the fuel tee, between the sealing valve nut and the air channel, and the middle part of the outer wall of the sealing valve moving valve core are all provided with sealing component 2.

[0014] The present invention provides a three-in-one angle valve for storing liquid fuel. It has the following beneficial effects: 1. The present invention sets a fuel tee, a self-closing valve joint and a sealing valve inside the angle valve, and rotates the hand wheel to drive the valve stem to move the air valve plug and the fuel valve plug together, and opens and closes the fuel channel and the air channel at the same time, thereby simplifying the problem of operating multiple valves and switches separately in the prior art. In actual use, the user only needs to rotate the hand wheel to control the switch of fuel and air, avoiding the complicated operation of manually opening the air valve and switch at the same time to prevent negative pressure inside the cylinder, reducing the risk of operating errors and fuel leakage, and improving safety and convenience.

[0015] 2. The present invention effectively solves the problem in the prior art that the steel cylinder cannot be completely sealed when not in use by installing a self-closing valve sealing ring on the outside of the output joint, combining the normally closed fixing nut and the sealing member 1 of the self-closing valve joint, thereby ensuring the sealing of the steel cylinder when it is stored and not in use, thereby avoiding fuel leakage caused by improper operation and improving safety during use.

[0016] 3. The present invention respectively sets a fuel channel and a fuel filling and output channel inside the angle valve to ensure that fuel filling and fuel output can be used independently, prevent poor fluidity of fuel filling and limitations of scene applications, ensure the flow rate and static electricity generation when the cylinder is filled with fuel, thereby avoiding the problem of untimely fuel supply during scene application and improving the good experience during use.

[0017] 4. The present invention extends the output inner tube to the bottom in the angle valve and sets a filter at the bottom of the inner tube, so that the user can filter out fuel impurities when directly sucking fuel from the bottom of the cylinder during use, thereby solving the problems of excessive fuel residue in the cylinder and oil pump blockage or damage due to fuel transportation or impure fuel in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the structure of the fuel filling pipe of the present invention; Figure 3 It is a front cross-sectional view of the fuel filling pipe of the present invention; Figure 4 It is a schematic diagram of the internal structure of the angle valve of the present invention; Figure 5 It is a front cross-sectional view of the angle valve of the present invention; Figure 6 It is a front cross-sectional view of the self-closing valve spring of the present invention; Figure 7 It is a front cross-sectional view of the sealing valve of the present invention; Figure 8 It is a front cross-sectional view of the sealing valve nut of the present invention.

[0019] Among them, 1. hand wheel; 2. valve cap; 3. angle valve; 4. refueling pipe; 5. spring column; 6. valve stem; 7. connecting piece; 8. moving meson; 9. sealing valve; 10. normally closed fixed nut; 11. moving valve stem; 12. fuel valve plug; 13. air valve plug; 14. output joint; 15. self-closing valve joint; 16. fuel inner pipe joint; 17. anti-disassembly seat; 18. inner pipe; 19. valve plug sealing ring; 20. fuel valve plug spring; 21. self-closing valve sealing ring; 22. self-closing Valve spring; 23. Air valve plug spring; 24. Valve stem spring; 25. Pressure cap; 26. Seal one; 27. Air outlet; 28. Fuel channel; 29. ​​Fuel filling and output channel; 30. Air channel; 31. Fuel tee; 32. Mounting hole; 33. Fuel output hole; 34. Valve plug hole; 35. Air connection hole; 36. Filter; 37. Fixing ring; 38. Sealing valve nut; 39. Sealing valve moving valve core; 40. Seal two; 41. Sealing valve spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the specification of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] In order to better understand the present invention, the above contents are described in detail below in conjunction with specific embodiments.

[0022] Example 1: Please refer to the attached Figure 1 -Attached Figure 7The embodiment of the present invention provides a three-in-one angle valve for storing liquid fuel, including: an angle valve 3, which is provided with an air outlet 27, a fuel channel 28 and a fuel filling and output channel 29 that are interconnected, a fuel tee 31 is installed in the middle of the angle valve 3, and the fuel tee 31 is provided with a mounting hole 32, a fuel output hole 33 and a valve plug hole 34 that are interconnected, a sealing valve 9 is installed at the top of the angle valve 3, and an air channel 30 is opened inside the sealing valve 9; a valve stem 6, which is located at the top of the angle valve 3 and is connected to the valve stem 6 through a connecting piece. 7 is connected with the air valve plug 13 and the fuel valve plug 12, the air valve plug 13 is located in the air channel 30, and the fuel valve plug 12 is located in the valve plug hole 34 after passing through the sealing valve 9; the normally closed fixed nut 10 is installed in the fuel filling and output channel 29, and a self-closing valve joint 15 is installed inside, and an output joint 14 is installed inside the self-closing valve joint 15; the refueling pipe 4 is provided with an air through hole on the upper part, and an inner tube 18 is provided inside it, the refueling pipe 4 is connected with the fuel channel 28, and the inner tube 18 is connected with the installation hole 32. A filter 36 is installed at the bottom of the inner tube 18. The top of the valve stem 6 is connected with a hand wheel 1, and a valve cap 2 is installed outside the angle valve 3, and a valve stem spring 24 is installed on the top of the outer wall of the valve stem 6, and a pressure cap 25 is installed on the top of the hand wheel 1.

[0023] In this embodiment, since the air valve plug 13 and the fuel valve plug 12 are both installed on the bottom surface of the movable meson 8, when the valve stem 6 moves downward, it will squeeze the connecting piece 7 and then squeeze the movable meson 8 downward. At this time, the air valve plug 13 blocks the air channel 30, and the fuel valve plug 12 enters the valve plug hole 34 to block the mounting hole 32. At this time, the cylinder is in a closed state, that is, the fuel cannot be discharged from the cylinder. When the valve stem 6 moves upward, the air valve plug 13 moves out of the air channel 30, and the fuel valve plug 12 moves out of the mounting hole 32. At this time, the fuel in the cylinder can be discharged from the cylinder, or fuel can be added to the cylinder. Therefore, in actual use, the user only needs to rotate the hand wheel 1 to control the switch of the fuel and air, avoiding the complicated operation of manually opening the air valve and the switch at the same time to prevent the negative pressure inside the cylinder, reducing the risk of operating errors and fuel leakage, and improving safety and convenience.

[0024] An air valve plug spring 23 is installed on the outer wall of the air valve plug 13, and the air valve plug spring 23 is located in the air channel 30. A valve plug sealing ring 19 is fixedly connected to the middle and lower part of the outer wall of the fuel valve plug 12. A fuel valve plug spring 20 is provided at the bottom of the outer wall of the fuel valve plug 12, and the fuel valve plug spring 20 is located in the valve plug hole 34.

[0025] In this embodiment, the air valve plug 13 will squeeze the air valve plug spring 23 when it moves downward, and the fuel valve plug 12 will squeeze the fuel valve plug spring 20 when it moves downward. Therefore, when the moving meson 8 moves upward, the elastic force of the air valve plug spring 23 and the fuel valve plug spring 20 will lift up the air valve plug 13 and the fuel valve plug 12 respectively, thereby helping the two to reset.

[0026] The connecting piece 7 is at the bottom of the valve stem 6, and the bottom surface of the connecting piece 7 is connected to the movable valve stem 11. The outer wall of the movable valve stem 11 is provided with screw threads, and the outer wall of the movable valve stem 11 is threadedly connected with a fixing ring 37. The fixing ring 37 is located at the inner bottom of the angle valve 3. The bottom surface of the movable valve stem 11 is rotatably connected to the movable meson 8, and the fuel valve plug 12 and the air valve plug 13 are respectively fixedly connected to the center and both sides of the bottom surface of the movable meson 8.

[0027] In this embodiment, after the handwheel 1 drives the valve stem 6 to rotate, the valve stem 6 will move up or down while rotating through the setting of the screw thread. When the valve stem 6 moves down, it drives the connecting piece 7, the movable valve stem 11 and the movable meson 8 to move down, and finally drives the fuel valve plug 12 and the air valve plug 13 to move down. At this time, the fuel valve plug spring 20 and the air valve plug spring 23 can be compressed.

[0028] The top of the filling pipe 4 is provided with an air connection hole 35, and the middle is provided with a through hole, the inner tube 18 is in the through hole, the inner top of the filling pipe 4 is provided with an anti-disassembly seat 17, the inner part of the anti-disassembly seat 17 is provided with a spring column 5, and the spring column 5 passes through the filling pipe 4. The inner bottom of the fuel tee 31 is provided with a fuel inner pipe joint 16, and the bottom of the fuel inner pipe joint 16 passes through the middle of the anti-disassembly seat 17.

[0029] In this embodiment, by installing the spring column 5 inside the anti-disassembly seat 17, and the spring column 5 passes through the filling pipe 4, the anti-disassembly seat 17 can be firmly engaged in the cylinder, thereby achieving the purpose of anti-disassembly.

[0030] The normally closed fixing nut 10 and the angle valve 3 and the self-closing valve joint 15 and the normally closed fixing nut 10 are sealed by a seal 26, the outer wall of the output joint 14 and the self-closing valve joint 15 are sealed by a self-closing valve sealing ring 21, and a self-closing valve spring 22 is provided on one side of the self-closing valve joint 15, and the self-closing valve spring 22 is in contact with the interior of the angle valve 3.

[0031] In this embodiment, the sealing effect between the inner wall of the angle valve 3 and the normally closed fixed nut 10 can be ensured by the seal 26 to prevent fuel leakage. The self-closing valve sealing ring 21 can ensure the sealing between the output joint 14 and the self-closing valve joint 15. With the cooperation of the self-closing valve spring 22, automatic sealing can be ensured when no fuel is filled to prevent fuel or gas leakage.

[0032] Working principle: When in use, rotating the hand wheel 1 clockwise drives the valve stem 6 to rotate clockwise. At this time, the valve stem 6 drives the connecting piece 7, moves the valve stem 11, and moves the meson 8 downward. At this time, the moving meson 8 simultaneously pushes the fuel valve plug 12 to compress the fuel valve plug spring 20, and the air valve plug 13 compresses the air valve plug spring 23. The fuel valve plug 12 blocks the valve plug hole 34, and the air valve plug 13 blocks the air channel 30, so the mounting hole 32 and the air channel 30 are in a closed state. When the valve stem 6 is loosened counterclockwise, the connecting piece 7 drives the movable valve stem 11 to rotate and move upward, and the fuel valve plug spring 20 and the air valve plug spring 23 will rebound, thereby pushing open the fuel valve plug 12, the air valve plug 13 and the movable meson 8, and then the fuel valve plug 12 will move away from the mounting hole 32, so that the mounting hole 32 is connected with the fuel output hole 33, and the air valve plug 13 is away from the air channel 30. At this time, the fuel channel 28, the fuel filling and output channel 29, the air channel 30 and the air outlet 27 are connected to each other, and then the air outlet 27 is connected to the inside of the steel cylinder, and the fuel can enter or be discharged from the steel cylinder; After the fuel filling and output channel 29 is connected to the fuel output hole 33, the fuel in the cylinder is discharged through the filter 36, the inner tube 18, the fuel inner tube joint 16, the mounting hole 32, the fuel output hole 33 and the fuel filling and output channel 29 in sequence. At this time, the outer tube of the stove is connected through the output joint 14, the self-closing valve joint 15 and the normally closed fixing nut 10, so that the fuel can be output to the stove and then enter the stove for combustion. At the same time, the air in the cylinder can be discharged and entered to prevent the generation of negative pressure and steam, and then the fuel channel 28 and the air channel 30 are in an open state. When the use is over, the hand wheel 1 is rotated clockwise to drive the valve stem 6 to rotate clockwise, so that the fuel valve plug 12 blocks the valve plug hole 34, and the air valve plug 13 blocks the air channel 30. At this time, the cylinder can be closed to stop the output of fuel.

[0033] Example 2: Please refer to the attached Figure 8 A sealing valve moving valve core 39 is arranged below the moving meson 8, the fuel valve plug 12 passes through the middle part of the sealing valve moving valve core 39, the bottom of the sealing valve moving valve core 39 is sleeved with the outer wall of the valve plug hole 34, the bottom of the inner wall of the air channel 30 is installed with a sealing valve nut 38, the top of the outer wall of the fuel tee 31 is sleeved with a sealing valve spring 41, and the top of the fuel tee 31, between the sealing valve nut 38 and the air channel 30, and the middle part of the outer wall of the sealing valve moving valve core 39 are all provided with a sealing member 2 40.

[0034] In this embodiment, based on Example 1, the sealing valve 9 is replaced by a sealing valve movable valve core 39. At this time, when the movable meson 8 moves downward, the middle part of the bottom of the sealing valve movable valve core 39 will contact the outer wall of the valve plug hole 34 at the top of the fuel tee 31, and the sealing member 2 40 at the top of the valve plug hole 34 will be squeezed, so the sealing valve movable valve core 39 and the valve plug hole 34 will be in a sealed state. At the same time, the sealing member 2 40 on the outer wall of the sealing valve movable valve core 39 will also contact the sealing valve nut 38. At this time, the sealing valve movable valve core 39 and the sealing valve nut 38 will also be in a sealed state, and the sealing valve spring 41 will also be compressed. The fuel valve plug 12 will seal the mounting hole 32 at this time, and when the movable meson 8 moves upward, the sealing valve spring 41 will lift the sealing valve movable valve core 39, and the fuel valve plug 12 will move out of the valve plug hole 34.

[0035] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-in-one angle valve for liquid fuel storage, characterized in that: include: An angle valve (3) is provided with an air outlet (27), a fuel passage (28) and a fuel filling and output passage (29) which are interconnected. A fuel tee (31) is installed in the middle of the angle valve (3). The fuel tee (31) is provided with a mounting hole (32), a fuel output hole (33) and a valve plug hole (34) which are interconnected. A sealing valve (9) is installed at the top of the angle valve (3). An air passage (30) is provided inside the sealing valve (9). A valve stem (6) is located at the top of the angle valve (3) and is connected to an air valve plug (13) and a fuel valve plug (12) via a connecting piece (7); the air valve plug (13) is located in the air passage (30); and the fuel valve plug (12) is located in the valve plug hole (34) after passing through the sealing valve (9); A normally closed fixed nut (10) is installed in the fuel filling and output channel (29) and has a self-closing valve joint (15) installed inside, and an output butt joint (14) is installed inside the self-closing valve joint (15); The refueling pipe (4) is provided with an air through hole at its upper portion and an inner tube (18) is provided inside the refueling pipe (4). The refueling pipe (4) is in communication with a fuel channel (28), and the inner tube (18) is in communication with a mounting hole (32).

2. A three-in-one angle valve for storing liquid fuel according to claim 1, characterized in that: A filter (36) is installed at the bottom of the inner tube (18).

3. A three-in-one angle valve for storing liquid fuel according to claim 1, characterized in that: The top of the valve stem (6) is connected to a hand wheel (1), a valve cap (2) is installed on the outside of the angle valve (3), a valve stem spring (24) is installed on the top of the outer wall of the valve stem (6), and a pressure cap (25) is installed on the top of the hand wheel (1).

4. A three-in-one angle valve for storing liquid fuel according to claim 1, characterized in that: An air valve plug spring (23) is installed on the outer wall of the air valve plug (13), and the air valve plug spring (23) is located in the air passage (30). A valve plug sealing ring (19) is fixedly connected to the middle and lower part of the outer wall of the fuel valve plug (12), and a fuel valve plug spring (20) is provided at the bottom of the outer wall of the fuel valve plug (12), and the fuel valve plug spring (20) is located in the valve plug hole (34).

5. The three-in-one angle valve for storing liquid fuel according to claim 1, characterized in that: The connecting piece (7) is located at the bottom of the valve stem (6); the bottom surface of the connecting piece (7) is connected to a movable valve stem (11); a screw thread is arranged on the outer wall of the movable valve stem (11); a fixing ring (37) is threadedly connected to the outer wall of the movable valve stem (11); the fixing ring (37) is located at the inner bottom of the angle valve (3); the bottom surface of the movable valve stem (11) is rotatably connected to a movable meson (8); the fuel valve plug (12) and the air valve plug (13) are respectively fixedly connected to the center and both sides of the bottom surface of the movable meson (8).

6. A three-in-one angle valve for storing liquid fuel according to claim 5, characterized in that: The top of the refueling pipe (4) is provided with an air connection hole (35), and the middle is provided with a through hole, the inner tube (18) is located in the through hole, an anti-disassembly seat (17) is installed at the inner top of the refueling pipe (4), a spring column (5) is installed inside the anti-disassembly seat (17), and the spring column (5) passes through the refueling pipe (4).

7. A three-in-one angle valve for storing liquid fuel according to claim 6, characterized in that: A fuel inner pipe joint (16) is installed at the inner bottom of the fuel tee (31), and the bottom of the fuel inner pipe joint (16) passes through the middle of the anti-disassembly seat (17).

8. The three-in-one angle valve for storing liquid fuel according to claim 1, characterized in that: The normally closed fixing nut (10) and the angle valve (3) and the self-closing valve joint (15) and the normally closed fixing nut (10) are sealed by a sealing member 1 (26); the outer wall of the output joint (14) and the self-closing valve joint (15) are sealed by a self-closing valve sealing ring (21); a self-closing valve spring (22) is provided on one side of the self-closing valve joint (15), and the self-closing valve spring (22) is in contact with the interior of the angle valve (3).

9. A three-in-one angle valve for storing liquid fuel according to claim 7, characterized in that: A sealing valve movable valve core (39) is arranged below the movable meson (8), the fuel valve plug (12) penetrates the middle of the sealing valve movable valve core (39), the bottom of the sealing valve movable valve core (39) is sleeved with the outer wall of the valve plug hole (34), the bottom of the inner wall of the air channel (30) is installed with a sealing valve nut (38), the top of the outer wall of the fuel tee (31) is sleeved with a sealing valve spring (41), and the top of the fuel tee (31), between the sealing valve nut (38) and the air channel (30), and the middle of the outer wall of the sealing valve movable valve core (39) are all provided with a sealing member 2 (40).

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