A gas line filling valve

Abstract

The present invention provides an air filling valve, comprising a valve body assembly, a valve seat assembly, a centering device and a thumbwheel assembly. The valve seat assembly comprises a valve seat, and the valve seat is provided with a vacuum pneumatic valve, a pressurized pneumatic valve and a pressure relief pneumatic valve. The vacuum pneumatic valve, the pressurized pneumatic valve and the pressure relief pneumatic valve are all composed of a valve sleeve and a valve stem installed in the valve sleeve and movable left and right. An inflation valve is provided at the upper end of the wine valve stem, and the inflation valve is composed of a valve core seat, an inflation valve stem and an inflation valve core installed in the valve core seat and movable up and down. A distal end of the inflation valve stem extends into the valve core seat, and a front end is located outside the wine valve stem. A section of the inflation valve stem extending into the valve core seat is connected to the valve core seat via an elastic pin. A valve stem pin hole corresponding to the inflation valve core is provided on the wine valve stem. After filling is completed, the air filling valve of the present invention blows the residual liquid in the return air pipe back into the liquid cylinder through high-pressure purge, and secondly omits the pre-injection process, i.e., carbon dioxide purge of the return air pipe, thereby saving energy and reducing pollution of the work surface.

Description

Technical Field

[0001] The present invention relates to the field of filling equipment, and in particular to an air circuit filling valve. Background Art

[0002] Filling valves are a technology used to fill various materials, including gaseous and non-gaseous liquids, into various packaging containers such as bottles, cans, boxes, barrels, or bags. Mechanized filling not only improves productivity, reduces product loss, and ensures packaging quality, but also reduces contamination between the production environment and the materials being filled. Therefore, filling technology is currently widely used in automated filling production in factories in the pharmaceutical, daily chemical, food, and specialized industries. Filling valves are an essential component for completing filling operations. Based on the filling principle, filling valves can be divided into normal pressure filling valves, positive pressure filling valves, negative pressure filling valves, or pressurized filling valves.

[0003] During filling, the liquid level can reach the top of the wine valve stem, but this part of the liquid will not be filled into the bottle (it is difficult to ensure the consistency of the liquid level). In order to ensure the smooth progress of the filling process, the return air pipe will be purged after filling. The residual liquid in the return air pipe will be directly discharged to the work surface during the purging and wasted (liquid loss) while consuming carbon dioxide; thereby causing environmental pollution on the work surface. Summary of the Invention

[0004] In order to overcome the deficiencies of the above-mentioned prior art, the purpose of the present invention is to provide an air circuit filling valve. After the filling is completed, the residual liquid in the return air pipe is blown back into the liquid tank by high-pressure blowing. Secondly, the pre-blowing and carbon dioxide purge processes are omitted, thereby achieving energy saving and reducing pollution of the work surface.

[0005] To achieve the above-mentioned purpose, the present invention provides an air circuit filling valve, including a valve body assembly, a valve seat assembly, a centering device and a thumbwheel assembly, the valve body assembly is sealingly installed on the valve seat assembly, the thumbwheel assembly is connected to the upper end of the valve body assembly; the centering device is fixed on one side of the valve seat assembly; the valve body assembly includes a valve body and a wine valve stem installed in the valve body; the valve seat assembly includes a valve seat and a hook installed on the valve seat, and the valve seat is provided with a vacuum pneumatic valve, a pressurized pneumatic valve, and a pressure relief pneumatic valve, the vacuum pneumatic valve, the pressurized pneumatic valve, and the pressure relief pneumatic valve are all composed of a valve sleeve and a valve stem installed in the valve sleeve and movable left and right, and the valve seat is internally provided with a valve stem that is connected to the vacuum pneumatic valve and the pressurized pneumatic valve. A gas passage connecting the movable valve and the pressure relief pneumatic valve; an inflation valve is provided at the upper end of the wine valve stem, and the inflation valve is installed in the wine valve stem. The inflation valve consists of a valve core seat, an inflation valve stem and an inflation valve core installed in the valve core seat and movable up and down. The end section of the inflation valve stem extends into the valve core seat, and the front end is located outside the wine valve stem. The section of the inflation valve stem extending into the valve core seat is connected to the valve core seat through an elastic pin; a spring is provided between the inflation valve stem and the inflation valve core, the front end of the inflation valve core extends out of the valve core seat and the front end of the inflation valve core is adapted to the hollow structure of the lower section of the wine valve stem, and a sealing ring is provided at the front end of the inflation valve core; a valve stem pin hole corresponding to the inflation valve core is provided on the wine valve stem.

[0006] Furthermore, the valve seat is also provided with a filling hole, an air pressure hole and an exhaust hole. The filling hole is connected with the vacuum pneumatic valve, the pressurized pneumatic valve and the pressure relief pneumatic valve through an air channel arranged in the valve seat; the air pressure hole is connected with the pressurized pneumatic valve, and the exhaust hole is connected with the vacuum pneumatic valve and the pressure relief pneumatic valve respectively; a gas channel is also provided in the valve seat.

[0007] Furthermore, in order to ensure the linkage and sealing of the pneumatic valve, two air cavities are formed between the valve sleeve and the valve seat, and the two air cavities are connected through the air holes set on the valve sleeve; a Y-type sealing ring is provided on the valve stem, and an O-type sealing ring is also provided on the valve stem on one side of the Y-type sealing ring; a third spring is installed at the front end of the valve stem and an end face sealing ring is also provided at the front of the valve stem.

[0008] Furthermore, in order to enable smooth filling, the centering device includes a centering guide rod and a roller seat arranged at the upper end of the centering guide rod, the roller seat is provided with a roller, and the roller is installed on the roller seat through a roller shaft; the valve seat is close to the centering device and is provided with an upper guide block and a lower guide block on the upper and lower sides, the centering guide rod passes through the upper guide block and the lower guide block and is connected to the roller seat, a sliding sleeve is provided between the centering guide rod and the upper guide block, and a flange sleeve is provided between the centering guide rod and the lower guide block; an elastic pad is provided between the roller seat and the upper guide block; and a centering cup seat is also provided at the lower end of the centering guide rod.

[0009] Furthermore, the centering cup seat is connected to the centering guide rod through a centering clamping spring, a centering cup is provided on the centering cup seat, and a bottle clamping rubber is provided on the centering cup.

[0010] Furthermore, in order to ensure the sealing of the filling process, the lower end of the wine valve stem is connected to an inflation valve seat, an O-ring and a gasket are provided between the inflation valve seat and the wine valve stem, a guide ring is provided on the periphery of the inflation valve seat, a liquid valve sealing gasket is provided at the lower end of the inflation valve seat, and the lower end of the inflation valve seat is also connected to a return air pipe connected to the wine valve stem, and a diverter umbrella is provided on the return air pipe.

[0011] Furthermore, in order to ensure the sealing performance between the pneumatic valve and the vacuum hole, the pressurizing hole and the pressure relief hole, O-rings are respectively provided at the front and rear parts of the valve sleeve.

[0012] Furthermore, the vacuum pneumatic valve, the pressurizing pneumatic valve, and the pressure-relieving pneumatic valve are fixed by a pressing plate, and the pressing plate is fixed to the valve seat by screws.

[0013] Furthermore, in order to be able to control the filling action, the thumbwheel assembly includes a claw wheel and a pressure pull rod connected to the claw wheel.

[0014] Furthermore, the wine valve stem is installed in the valve body through the guide ring, and a first spring is provided between the directional ring and the inflation valve stem; a locking clamp is provided at the front end of the wine valve stem, and a second spring is provided between the locking clamp and the guide ring, and the first spring and the second spring are respectively sleeved on the wine valve stem.

[0015] The beneficial effects of the present invention are: an air path filling valve, after the filling is completed, applies pressure to the filling bottle through the pressure hole, so that the residual liquid in the return air pipe is blown back into the liquid tank, thereby ensuring that the liquid loss in the entire filling process is close to zero, and secondly omitting the pre-blowing process (equivalent to omitting the carbon dioxide purge). In the ordinary filling process, after the previous filling action is completed, the next filling action is carried out, and the return air pipe needs to be purged before filling to ensure that there is no residual liquid in the return air pipe to cause poor return air. The canning action adopted by the present invention can omit the pre-blowing process to achieve the same effect, greatly reduce the loss of filling material, and has the effects of energy saving and reducing pollution of the work surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For ease of explanation, the present invention is described in detail with reference to the following preferred embodiments and the accompanying drawings.

[0017] Figure 1 This is a schematic diagram of a gas circuit filling valve of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of an air circuit filling valve of the present invention;

[0019] Figure 3 This is a cross-sectional structural diagram of a valve seat in a gas line filling valve of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a pneumatic valve in an air circuit filling valve of the present invention and an enlarged diagram of the structure of a Y-type sealing ring;

[0021] Figure 5 This is a left view of a valve seat in a gas line filling valve of the present invention;

[0022] Figure 6 This is a structural diagram of a centering component in a gas line filling valve of the present invention;

[0023] Figure 7 It is a left view of a gas circuit filling valve of the present invention.

[0024] In the figure: valve body assembly-1, valve body-11, wine valve stem-12, valve stem pin hole-121, pressure plate-111, screw-112, guide ring-13, first spring-14, locking clamp-122, second spring-15, valve seat assembly-2, valve seat-21, filling hole-211, bottle sealing flange-212, air pressure hole-213, exhaust hole-214, airway-215, hook-22, vacuum pneumatic valve-23, pressurized pneumatic valve-24, pressure relief pneumatic valve-25, centering device-3, centering guide rod-31, roller seat-32, roller-321, roller shaft-322, upper guide block-33, lower guide block-34, sliding sleeve-35, flange sleeve -36, elastic pad -37, centering cup seat -38, centering retaining spring -39, centering cup -381, bottle clamp rubber -382, dial wheel assembly -4, clevis pulley -41, pressure pull rod -42, air cavity -5, valve sleeve -51, air hole -511, pneumatic valve stem -52, Y-type sealing ring -521, third spring -523, end face sealing ring -524, gas channel -6, inflation valve -7, valve core seat -71, inflation valve stem -72, inflation valve core -73, elastic pin -74, spring -75, sealing ring -76, O-ring -9, inflation valve seat -8, gasket -82, guide ring -83, liquid valve sealing gasket -84, return pipe -85, diverter umbrella -851. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0026] like Figure 1-7The air path filling valve shown includes a valve body assembly 1, a valve seat assembly 2, a centering device 3 and a thumbwheel assembly 4. The valve body assembly 1 is sealingly mounted on the valve seat assembly 2, and the thumbwheel assembly 4 is connected to the upper end of the valve body assembly 1; the centering device 3 is fixed on one side of the valve seat assembly 2; the valve body assembly 1 includes a valve body 11 and a wine valve stem 12 installed in the valve body 11; the valve seat assembly 2 includes a valve seat 21 and a hook 22 installed on the valve seat 21, and the valve seat 21 is also provided with a filling hole 211, an air pressure hole 213 and an exhaust hole 214.

[0027] The valve seat 21 is provided with a vacuum pneumatic valve 23, a pressurizing pneumatic valve 24, and a pressure relief pneumatic valve 25. The vacuum pneumatic valve 23, the pressurizing pneumatic valve 24, and the pressure relief pneumatic valve 25 are each composed of a valve sleeve 51 and a pneumatic valve stem 52 installed in the valve sleeve 51 and movable left and right. The vacuum pneumatic valve 23, the pressurizing pneumatic valve 24, and the pressure relief pneumatic valve 25 are fixed by a pressure plate 111, and the pressure plate 111 is fixed to the valve seat 21 by screws 112.

[0028] like Figure 1 、 Figure 4 The vacuum pneumatic valve 23, the pressurized pneumatic valve 24, and the pressure relief pneumatic valve 25 are all composed of a valve sleeve 51 and a pneumatic valve stem 52 installed in the valve sleeve 51 and movable left and right. The pneumatic valve stem is installed in the valve sleeve, and an O-ring 9 is provided at the front and rear of the valve sleeve 51. A Y-ring 521 and an O-ring 9 are provided on the pneumatic valve stem for sealing. A third spring 523 for resetting the pneumatic valve stem is provided at the front end of the valve sleeve, and an end face sealing ring 524 is also provided at the front end of the pneumatic valve stem. The end face sealing ring 524 is used for the pneumatic valve stem and the valve The sealing effect of the front end of the sleeve ensures the smooth progress of the entire filling process. The pneumatic valve stems on the vacuum pneumatic valve 23, the pressurizing pneumatic valve 24 and the pressure relief pneumatic valve 25 are provided with Y-shaped sealing rings 521, and their orientations are different according to the different actions of the pneumatic valve stems. The Y-shaped structure of the Y-shaped sealing ring 521 on the pneumatic valve stem of the vacuum pneumatic valve 23 is opposite to the Y-shaped sealing ring 521 on the pneumatic valve stem 52 in the pressure relief pneumatic valve 25 and the pressurizing pneumatic valve 24, mainly for better sealing effect of each pneumatic valve in different states.

[0029] Two air cavities 5 are formed between the valve sleeve 51 and the valve seat 21. The air cavities 5 are connected through the air holes 511 provided on the valve sleeve 51, and the end face sealing ring 524 provided at the front end of the valve stem can seal the valve sleeve 51. In the sealed state, the two air cavities 5 are not connected. When vacuuming is required during the filling process, the vacuum pneumatic valve 23 is opened and the other valves are closed. The air in the filling bottle is extracted through the gas channel 6 and the airway 215 provided in the valve seat, and then the filling action is carried out; after the filling is completed, the filling port of the entire filling valve is forcibly closed, and then a large air pressure is applied to the filling bottle through the pressurized pneumatic valve 24 to prompt the liquid remaining in the return pipe 85 after the filling is completed to return to the liquid tank through the wine valve stem 12, thereby reducing waste. After the residual liquid is blown back, the air pressure in the bottle is discharged through the pressure relief pneumatic valve 25.

[0030] like Figure 2 The wine valve stem 12 is shown as having an inflation valve 7 at the upper end. The wine valve stem 12 is a valve stem with a hollow structure. The inflation valve 7 is installed in the wine valve stem 12. The inflation valve 7 is composed of a valve core seat 71, an inflation valve stem 72 and an inflation valve core 73 installed in the valve core seat 71 and movable up and down. The end of the inflation valve stem 72 extends into the valve core seat 71, and the front end is located outside the wine valve stem 12. The section of the inflation valve stem 72 extending into the valve core seat 71 is connected to the valve core seat 71 by an elastic pin 74. The elastic pin can greatly reduce the torque force of the inflation valve during operation to ensure the stability of operation; a spring 75 is provided between the inflation valve stem 72 and the inflation valve core 73, the front end of the inflation valve core 73 extends out of the valve core seat 71 and the front end of the inflation valve core 73 is adapted to the hollow structure of the lower section of the wine valve stem 12, and the front end of the inflation valve core 73 is provided with a sealing ring 76 for sealing; the wine The valve stem 12 is provided with a valve stem pin hole 121 corresponding to the inflation valve core 73. During filling, the inflation valve 7 is in a closed state. At the same time, the inflation valve core 73 closes the return air duct (not marked) at the lower end of the wine valve stem 12 under the action of the spring 75 and the inflation valve stem. After the filling is completed, the pressurized pneumatic valve 24 is opened to apply pressure to the filling bottle. At this time, the air pressure in the bottle is higher than the air pressure in the liquid tank (not marked), which prompts the residual liquid in the return air pipe 85 to return to the liquid tank (not marked). Under the action of pressure, the inflation valve core 73 in the inflation valve 7 is pushed up and opened, so that the liquid tank (not marked) and the wine valve stem 12 are connected through the valve stem pin hole 121, and the residual liquid is discharged into the liquid tank (not marked) through the valve stem pin hole 121 under the action of air pressure, solving the problem of liquid waste. At the same time, the return air pipe 85 and the wine valve stem 12 are purged, thereby eliminating the pre-blowing action before filling.

[0031] The filling hole 211 is connected to the vacuum pneumatic valve 23, the pressurizing pneumatic valve 24, and the pressure relief pneumatic valve 25 through the air channel 215; the air pressure hole 213 is connected to the pressurizing pneumatic valve 24 through a single gas channel 6, and the exhaust hole 214 is connected to the vacuum pneumatic valve 23 and the pressure relief pneumatic valve 25 through another gas channel 6 respectively.

[0032] In order to ensure the sealing of the entire filling valve, the lower end of the wine valve stem 12 is connected to the inflation valve seat 8, and an O-ring 9 and a gasket 82 are provided between the inflation valve seat 8 and the wine valve stem 12. A guide ring 83 is provided on the periphery of the inflation valve seat 8, and a liquid valve sealing gasket 84 is provided at the lower end of the inflation valve seat 8. The lower end of the inflation valve seat 8 is also connected to a return air pipe 85 connected to the wine valve stem 12. A diverter umbrella 851 is provided on the return air pipe 85, and the material can flow into the container evenly along the diverter umbrella 851.

[0033] The wine valve stem 12 is installed in the valve body 11 through the guide ring 13, and a first spring 14 is provided between the guide ring 13 and the inflation valve stem 72; a locking clamp 122 is provided at the front end of the wine valve stem 12, and a second spring 15 is provided between the locking clamp 122 and the guide ring 13. The first spring 14 and the second spring 15 are respectively sleeved on the wine valve stem 12, and the first spring 14 can reset the wine valve stem 12, and the second spring 15 can reset the inflation valve stem 72.

[0034] The centering device 3 includes a centering guide rod 31 and a roller seat 32 arranged at the upper end of the centering guide rod 31, a roller 321 is provided on the roller seat 32, and the roller 321 is installed on the roller seat 32 through a roller shaft 322. In order to increase the stability of the centering guide rod 31, a parallel double guide rod is provided; the valve seat 21 is provided with an upper guide block 33 and a lower guide block 34 on the upper and lower sides of the side close to the centering device 3, the centering guide rod 31 passes through the upper guide block 33 and the lower guide block 34 and is connected to the roller seat 32, and the centering guide rod 31 is provided with a plurality of parallel double guide rods. A sliding sleeve 35 is provided between the rod 31 and the upper guide block 33 to facilitate the movement of the centering guide rod 31, and a flange sleeve 36 is provided between the centering guide rod 31 and the lower guide block 34; an elastic pad 37 for mitigating impact force is provided between the roller seat 32 and the upper guide block 33; a centering cup seat 38 is also provided at the lower end of the centering guide rod 31, and the centering cup seat 38 is connected to the centering guide rod 31 through a centering retaining spring 39, and a centering cup 381 is provided on the centering cup seat 38, and a bottle clamping rubber 382 is provided on the centering cup 381.

[0035] The thumbwheel assembly 4 includes a claw wheel 41 and a pressure pull rod 42 connected to the claw wheel 41. The pressure pull rod on the thumbwheel assembly 4 can control the action of the entire valve body assembly filling process.

[0036] The present invention eliminates the pre-blowing action during the filling process. Its principle is as follows: first, the bottle is fed in, and the bottle supporting cylinder (not shown) in the machine rises, so that the upper part of the bottle clamping rubber 382 is tightly fitted with the filling hole 211 on the valve seat 21. A bottle sealing flange 212 is provided at the joint between the filling hole 211 and the bottle clamping rubber 382 for sealing; the bottle mouth is tightly fitted with the bottle clamping rubber 382 and forms a sealed whole with the filling valve through the bottle clamping rubber 382--bottle sealing flange 212; the filling is completed through the exhaust hole 214 and the air pressure hole 213 provided on the valve seat 21. After the bottle is placed, the vacuum pneumatic valve 23 is first opened to perform the first vacuum to remove all the air in the bottle, and then the first back pressure is performed; the second vacuum is performed again, and then the second back pressure is performed; at this time, the preparation process before filling is completed, and then the filling process is carried out. During the filling process, the wine valve stem 12 in the valve body assembly 1 is reset under the action of the first spring 14. At this time, the inflation valve seat 8 connected to the lower end of the wine valve stem 12 is opened, and the liquid in the liquid tank (not marked) flows into the filling bottle. After the filling is completed, the dial wheel assembly 4 moves the wine valve stem 12 downward Pressure is applied, at this time the inflation valve seat 8 closes the filling port, forcibly closes the filling valve, and then begins the process of purging the residual liquid in the return air pipe; pressure is applied through the air pressure hole 213 on the valve seat 21, the pressurized pneumatic valve is opened, and the pressure enters the connected filling hole 211 and the filling bottle (not marked) connected to the filling hole 211 through the air channel 215. The purpose is to pressurize the filling bottle so that the air pressure in the bottle is higher than the air pressure in the liquid tank (not marked), thereby prompting the residual liquid in the return air pipe 85 to return to the liquid tank (not marked), and under the action of pressure, the inflation air in the inflation valve 7 is discharged. The valve core 73 is lifted up and opened, so that the liquid tank (not marked) and the wine valve stem 12 are connected through the valve stem pin hole 121, and the residual liquid is discharged into the liquid tank (not marked) through the valve stem pin hole 121 under the action of air pressure, thereby solving the problem of liquid waste. At the same time, the return air pipe 85 and the wine valve stem 12 are also purged, thus eliminating the pre-blowing action before filling. The residual liquid in the return air pipe 85 is blown back into the liquid tank (not marked) by high pressure, and then the pressure relief pneumatic valve is opened to release the pressure in the filling bottle and the air channel 215. At this time, the entire filling process is completed.

[0037] The main purpose of the invention is to force the valve to close and then apply a pressure greater than that in the liquid tank to the filling bottle, so as to blow the liquid remaining in the return pipe 85 back into the liquid tank (not marked). The focus of the invention is that the liquid loss during the filling process is almost zero. For example, when filling a bottle of 500ML liquid, there will be a loss of 10-20ML of liquid. Usually 40,000 bottles of liquid can be filled in one hour. The use of the present invention can greatly reduce production costs. Secondly, the pre-blowing process is omitted, which greatly reduces gas loss (equivalent to omitting carbon dioxide purge). Since the residual liquid will not be blown out, the pollution of the work surface is reduced.

[0038] The preferred embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the left-right rotation technical solution of the present invention is not limited to the above-mentioned embodiment, nor is it limited to use only on air purifiers. Within the scope of knowledge possessed by ordinary technicians in this field, various changes can be made without departing from the left-right rotation solution of the present invention. These changes involve related technologies well known to those skilled in the art, and all fall within the scope of protection of the patent of this invention.

Claims

1. A gas line filling valve, comprising a valve body assembly, a valve seat assembly, a centering device, and a thumbwheel assembly, wherein the valve body assembly is sealingly mounted on the valve seat assembly, and the thumbwheel assembly is engaged with the upper end of the valve body assembly; the centering device is fixed to one side of the valve seat assembly; the valve body assembly comprises a valve body and a wine valve stem mounted within the valve body; the valve seat assembly comprises a valve seat and a hook mounted on the valve seat, characterized in that: The valve seat is provided with a vacuum pneumatic valve, a pressurized pneumatic valve, and a pressure relief pneumatic valve, each of which is composed of a valve sleeve and a valve stem installed in the valve sleeve and movable left and right. A gas channel connected to the vacuum pneumatic valve, the pressurized pneumatic valve, and the pressure relief pneumatic valve is provided inside the valve seat; an inflation valve is provided at the upper end of the wine valve stem, and the inflation valve is installed in the wine valve stem. The inflation valve is composed of a valve core seat, an inflation valve stem, and a valve stem installed in the valve core seat and movable left and right. The inflation valve core is composed of a downward-moving inflation valve core, the end section of the inflation valve stem extends into the valve core seat, and the front end is located outside the wine valve stem. The section of the inflation valve stem extending into the valve core seat is connected to the valve core seat through an elastic pin; a spring is provided between the inflation valve stem and the inflation valve core, the front end of the inflation valve core extends out of the valve core seat and the front end of the inflation valve core is adapted to the hollow structure of the lower section of the wine valve stem, and a sealing ring is provided at the front end of the inflation valve core; the wine valve stem is provided with a valve stem pin hole corresponding to the inflation valve core.

2. The gas line filling valve according to claim 1, characterized in that: The valve seat is also provided with a filling hole, an air pressure hole and an exhaust hole. The filling hole is connected with the vacuum pneumatic valve, the pressurized pneumatic valve and the pressure relief pneumatic valve through an air channel arranged in the valve seat; the air pressure hole is connected with the pressurized pneumatic valve, and the exhaust hole is connected with the vacuum pneumatic valve and the pressure relief pneumatic valve respectively; a gas channel is also provided in the valve seat.

3. The gas line filling valve according to claim 1, characterized in that: Two air cavities are formed between the valve sleeve and the valve seat, and the two air cavities are connected through the air holes provided on the valve sleeve; a Y-shaped sealing ring is provided on the valve stem, and an O-shaped sealing ring is also provided on the valve stem on one side of the Y-shaped sealing ring; a third spring is installed at the front end of the valve stem and an end face sealing ring is also provided at the front of the valve stem.

4. The gas line filling valve according to claim 1, characterized in that: The centering device includes a centering guide rod and a roller seat arranged at the upper end of the centering guide rod, the roller seat is provided with a roller, and the roller is installed on the roller seat through a roller shaft; the valve seat is close to the centering device and is provided with an upper guide block and a lower guide block on the upper and lower sides, the centering guide rod passes through the upper guide block and the lower guide block and is connected to the roller seat, a sliding sleeve is provided between the centering guide rod and the upper guide block, and a flange sleeve is provided between the centering guide rod and the lower guide block; an elastic pad is provided between the roller seat and the upper guide block; and a centering cup seat is also provided at the lower end of the centering guide rod.

5. The gas line filling valve according to claim 4, characterized in that: The centering cup seat is connected to the centering guide rod through a centering clamping spring. The centering cup seat is provided with a centering cup, and the centering cup is provided with a bottle clamping rubber.

6. The gas line filling valve according to claim 1, characterized in that: The lower end of the wine valve stem is connected to an inflation valve seat, an O-ring and a gasket are provided between the inflation valve seat and the wine valve stem, a guide ring is provided on the periphery of the inflation valve seat, a liquid valve sealing gasket is provided at the lower end of the inflation valve seat, and the lower end of the inflation valve seat is also connected to a return air pipe connected to the wine valve stem, and a diverter umbrella is provided on the return air pipe.

7. The gas line filling valve according to claim 1, characterized in that: The front and rear parts of the valve sleeve are respectively provided with O-type sealing rings.

8. The gas line filling valve according to claim 1, characterized in that: The vacuum pneumatic valve, the pressurizing pneumatic valve, and the pressure-relieving pneumatic valve are fixed by a pressing plate, and the pressing plate is fixed on the valve seat by screws.

9. The gas line filling valve according to claim 1, characterized in that: The thumbwheel assembly comprises a claw wheel and a pressure pull rod connected to the claw wheel.

10. The gas line filling valve according to claim 1, characterized in that: The wine valve stem is installed in the valve body through the guide ring, and a first spring is provided between the guide ring and the inflation valve stem; a locking clamp is provided at the front end of the wine valve stem, and a second spring is provided between the locking clamp and the guide ring, and the first spring and the second spring are respectively sleeved on the wine valve stem.

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