An electronic filling valve

Abstract

The present invention provides an electronic filling valve, comprising a valve body assembly, a valve seat assembly and a centering device, an inflation valve being provided on a dial sleeve, the valve body assembly being mounted on the valve seat assembly, the valve seat assembly being mounted on the centering device, an upper end of the valve body assembly being provided with a cylinder control valve assembly, the upper end of the inflation valve being mounted on the dial sleeve, the lower portion of the inflation valve extending into a wine valve stem, the inflation valve comprising a sleeve, an inflation valve stem and a valve needle rod disposed in the sleeve and capable of moving up and down, a compression spring being provided between the inflation valve stem and the valve needle rod, the front end of the valve needle rod extending out of the sleeve and the front end of the valve needle rod being adapted to the hollow structure of the lower section of the wine valve stem, and a sealing ring being provided at the front end of the valve needle rod. The electronic filling valve of the present invention can, after the filling is completed, blow the residual liquid in the return air pipe back into the liquid cylinder by applying pressure to blow, thereby omitting the pre-blowing process, i.e., the carbon dioxide purging process of the return air pipe, thereby saving energy and reducing the pollution of the work surface.

Description

Technical Field

[0001] The present invention relates to the field of filling equipment, and in particular to an electronic 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 shortcomings of the above-mentioned prior art, the purpose of the present invention is to provide an electronic filling valve. After the filling is completed, the residual liquid in the return pipe is blown back into the liquid cylinder by applying pressure to the filling bottle. Secondly, the pre-blowing and carbon dioxide purging 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 electronic filling valve, including a valve body assembly, a valve seat assembly and a centering device, the valve body assembly is installed on the valve seat assembly, the valve seat assembly is installed on the centering device, the upper end of the valve body assembly is provided with a cylinder control valve assembly, the cylinder control valve assembly includes an upper cover, a lower cover and a cylinder sleeve installed between the upper cover and the lower cover, the upper cover, the lower cover and the cylinder sleeve form a cavity, a piston is provided in the cavity, the upper cover is provided with an air inlet, the lower part of the lower cover is connected to a bellows, the piston extends out of the cavity at one end and extends into the bellows, the lower part of the bellows is connected to a dial sleeve; the valve body assembly includes a liquid inlet sleeve and a wine valve stem arranged in the liquid inlet sleeve, the wine valve stem is sleeved with a wine valve spring; the valve seat assembly includes a valve seat and a pressure relief valve arranged on the valve seat, and the valve seat is provided with a material port.

[0006] The air filling valve is provided on the push sleeve, the upper end of the air filling valve is connected to the push sleeve, and the lower part of the air filling valve is placed in the wine valve stem. The air filling valve includes a sleeve, an air filling valve stem and a valve needle rod arranged in the sleeve and capable of moving up and down. A compression spring is provided between the air filling valve stem and the valve needle rod, the front end of the valve needle rod extends out of the sleeve and the front end of the valve needle rod 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 valve needle rod; a valve stem pin hole corresponding to the front end of the valve needle rod is provided on the wine valve stem, and the valve stem pin hole is connected to the hollow structure inside the wine valve stem; a piston cavity is provided in the valve seat, and a piston valve assembly is installed in the piston cavity; a pressurized hole connected to the piston cavity is provided at the bottom of the valve seat, and the piston cavity is connected to the material port through an airway; a bend pipe joint connected to the piston cavity is also provided on the upper part of the valve seat.

[0007] Furthermore, a spacer is provided between the shifting sleeve and the wine valve stem, and a first spring is provided between the spacer and the shifting sleeve; the upper part of the inflation valve stem passes through the spacer and is connected to the shifting sleeve, and the lower part of the inflation valve stem is located in the sleeve.

[0008] Furthermore, the centering device includes a centering guide rod and a roller shaft arranged on the centering guide rod, a roller is provided on the roller shaft, a shaft retaining spring is clamped at the front end of the roller, a valve seat sleeve is provided at the contact position between the valve seat and the centering device, and a spacer sleeve is provided between the valve seat and the roller.

[0009] Furthermore, the piston valve assembly includes a piston rod, a plug-in and a leather cap arranged at both ends of the piston rod; one end of the piston rod passes through the plug-in and is covered with a diaphragm, and the edge of the diaphragm is fixed at the junction of the inner wall of the valve seat and the plug-in; the other end of the piston rod passes through the leather cap and is covered with a displacer; a spring is covered on the piston rod between the plug-in and the leather cap.

[0010] Furthermore, the centering device is fixedly connected to the valve seat, and the lower end of the centering device is connected to a centering cup seat, the centering cup seat is provided with a centering cup, and the centering cup is provided with a bottle mouth sealing gasket; the centering cup is provided with a filling port at the material port on the valve seat corresponding to the centering cup; the pressure relief valve includes a valve core, a control valve cover, and a control valve body, a diaphragm is provided between the control valve body and the control valve cover, the valve core is arranged in the control valve body, a valve core spring is provided at the rear end of the valve core, and a diaphragm is provided at the end of the valve core extending out of the control valve body and located in the valve seat, and a quick connector is provided on the pressure relief valve.

[0011] Furthermore, the lower portion of the wine valve stem is connected to a liquid valve stem, and the lower portion of the liquid valve stem is connected to an air return pipe. The air return pipe can pass through the filling port, and a diversion umbrella is provided on the air return pipe.

[0012] Furthermore, a retaining ring is provided at the upper end of the liquid inlet sleeve, and the retaining ring is pressed on the upper end of the wine valve spring. A liquid inlet hole is provided on the liquid inlet sleeve.

[0013] Furthermore, an O-ring is provided on the upper end of the bellows; an O-ring is provided on the wine valve stem at the upper end of the retaining ring; and an O-ring is provided between the liquid valve stem and the wine valve stem.

[0014] Furthermore, a sealing gasket for sealing the material port is provided at the lower end of the liquid valve stem.

[0015] The beneficial effects of the present invention are: an electronic filling valve, after 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 cylinder, thereby ensuring that the liquid loss in the entire filling process is almost 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 an electronic filling valve of the present invention;

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

[0019] Figure 3 This is a partial cross-sectional structural diagram of an electronic filling valve of the present invention;

[0020] Figure 4 This is a cross-sectional structural diagram of a valve seat in an electronic filling valve of the present invention;

[0021] Figure 5 This is a structural diagram of an air filling valve in an electronic filling valve of the present invention;

[0022] In the figure: valve body assembly-1, valve seat assembly-2, centering device-3, cylinder control valve assembly-4, upper cover-41, lower cover-42, cylinder sleeve-43, cavity-44, piston-45, bellows-46, dial sleeve-47, liquid inlet sleeve-11, wine valve stem-12, wine valve spring-13, valve seat-21, pressure relief valve-22, material port-212, sealing gasket-213, charging valve-5, sleeve-51, charging valve stem-52, valve needle rod-53, compression spring-54, sealing ring-55, valve stem pin hole-14, piston cavity-211, piston valve assembly-6, pressurizing hole-23, elbow joint-24, liquid valve stem-7, return air pipe-8, diverter umbrella-81, centering cup holder-9, Centering cup 91, bottle mouth sealing gasket 92, filling port 93, valve core 221, control valve cover 222, control valve body 223, diaphragm 224, valve core spring 225, diaphragm 226, quick connector 227, retaining ring 111, liquid inlet 112, O-ring 461, spacer 471, first spring 472, centering guide rod 31, roller shaft 32, roller 33, shaft retaining ring 34, valve seat bushing 35, spacer 36, piston rod 61, plug-in 62, leather cap 63, diaphragm 64, displacer 65, spring 66, air inlet 411, airway 25, hexagon socket head cap screw 228, hexagon socket head cap screw 229. DETAILED DESCRIPTION

[0023] 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.

[0024] like Figure 1-5The electronic filling valve shown in the figure includes a valve body assembly 1, a valve seat assembly 2 and a centering device 3, wherein the valve body assembly 1 is mounted on the valve seat assembly 2, and the valve seat assembly 2 is mounted on the centering device 3, the valve seat assembly 2 includes a valve seat 21 and a pressure relief valve 22 arranged on the valve seat 21, and the valve seat 21 is provided with a material port 212; the upper end of the valve body assembly 1 is provided with a cylinder control valve assembly 4, and the cylinder control valve assembly 4 includes an upper cover 41, a lower cover 42 and a cylinder sleeve 43 installed between the upper cover 41 and the lower cover 42, the upper cover 41, the lower cover 42 and the cylinder sleeve 43 form a cavity 44, a piston 45 is provided in the cavity 44, the upper cover is provided with an air inlet 411, the The lower part of the lower cover 42 is connected to a bellows 46, and one end of the piston 45 extending out of the cavity 44 extends into the bellows 46. The lower part of the bellows 46 is connected to a dial sleeve 47; the valve body assembly 1 includes a liquid inlet sleeve 11 and a wine valve stem 12 disposed in the liquid inlet sleeve 11. The lower part of the wine valve stem 12 is connected to the liquid valve stem 7. The lower end of the liquid valve stem 7 is provided with a sealing gasket 213 for sealing the material port 212. The liquid valve stem 7 can control the opening and closing of the material port. When opened, the liquid cylinder (not marked) can flow out of the material port. The liquid inlet sleeve 11 is installed on the valve seat. The lower part of the liquid valve stem 7 is connected to the return air pipe 8, and the return air pipe 8 is provided with a diverter umbrella 81. The wine valve stem 12 is also covered with a wine valve spring 13.

[0025] The inflation valve 5 is provided on the sleeve 47, the upper end of the inflation valve 5 is fixedly mounted on the sleeve 47, the lower part of the inflation valve 5 is placed in the wine valve stem 12, a spacer 471 is provided between the sleeve 47 and the wine valve stem 12, and a first spring 472 is provided between the spacer 471 and the sleeve 47; the inflation valve 5 includes a sleeve 51, an inflation valve stem 52 and a valve needle rod 53 that can move up and down and are arranged in the sleeve 51, and a compression spring is provided between the inflation valve stem 52 and the valve needle rod 53. Spring 54, the front end of the valve needle rod 53 extends out of the sleeve 51 and the front end of the valve needle rod 53 is adapted to the hollow structure of the lower section of the wine valve stem 12, and a sealing ring 55 is provided at the front end of the valve needle rod 53; the wine valve stem 12 is provided with a valve stem pin hole 14 corresponding to the front end of the valve needle rod 53, and the valve stem pin hole 14 is connected to the hollow structure inside the wine valve stem 12; the upper part of the inflation valve stem 52 is connected to the pull sleeve 47 through the spacer 471, and the lower part of the inflation valve stem 52 is installed in the sleeve 51.

[0026] The inflation valve 5 is integrally installed in the space above the wine valve stem 12. The upper end of the inflation valve stem 52 is longer than the sleeve 51 and extends out of the wine valve stem 12 to be connected to the dial sleeve 47. A compression spring 54 for resetting is installed between the lower end of the inflation valve stem 52 and the valve needle rod 53. The front end of the valve needle rod 53 extends out of the sleeve 51. The front end of the valve needle rod 53 can seal the lower channel of the wine valve stem 12 (the wine valve stem is a hollow structure). A sealing ring 55 is also installed at the front end of the valve needle rod 53. The working principle of the rod 53 is that the valve needle rod 53 is pushed upward under the action of air pressure. After its front end is pushed up, the channel of the wine valve stem 12 is opened, and the filling bottle (not marked), the return air pipe 8, the wine valve stem 12 and the liquid cylinder (not marked) are connected. Under the action of air pressure, the excess material remaining in the return air pipe 8 and the filling bottle (not marked) will reach the wine valve stem 12 along the return air pipe 8, and then enter the liquid cylinder through the valve stem pin hole 14 provided on the wine valve stem 12, thereby realizing the recovery of residual liquid of the material.

[0027] The valve seat 21 is provided with a piston cavity 211, in which a piston valve assembly 6 is installed; a pressurized hole 23 communicating with the piston cavity 211 is provided at the bottom of the valve seat 21, and the piston cavity 211 is communicated with the material port 212 via an air passage 25; an elbow joint 24 communicating with the piston cavity 211 is also provided at the top of the valve seat 21. The piston valve assembly closes the air passage 25 between the piston cavity and the material port during filling, and the liquid valve stem 7 is opened. At this time, the liquid cylinder (not shown) and the filling bottle (not shown) are in contact with each other. Mark), the material port 212 on the valve seat 21 is connected to realize filling; after filling is completed, the liquid valve stem 7 closes the space between the liquid cylinder and the material port 212, and the piston valve assembly 6 opens the sealed airway 25. At this time, the pressurizing hole 23, the material port 212, and the filling bottle are connected, and the filling bottle is pressurized through the pressurizing hole 23. The material in the filling bottle that exceeds the set liquid level and the material remaining in the return air pipe 8 are returned to the liquid cylinder through the hollow channel of the wine valve stem 12 and the valve stem pin hole 14 under the action of air pressure.

[0028] The centering device 3 includes a centering guide rod 31 and a roller shaft 32 arranged on the centering guide rod 31, a roller 33 is provided on the roller shaft 32, and a shaft retaining spring 34 is clamped at the front end of the roller 33. A valve seat bushing 35 is provided at the contact position between the valve seat 21 and the centering device 3, and a spacer sleeve 36 is provided between the valve seat 21 and the roller 33.

[0029] The piston valve assembly 6 includes a piston rod 61, a plug-in 62 and a leather cap 63 arranged at both ends of the piston rod 61; one end of the piston rod 61 passes through the plug-in 62 and is covered with a diaphragm 64, and the edge of the diaphragm 64 is fixed at the junction of the inner wall of the valve seat 21 and the plug-in 62; the other end of the piston rod 61 passes through the leather cap 63 and is covered with a displacer 65; a spring 66 is covered on the piston rod 61 between the plug-in 62 and the leather cap 63, and the diaphragm seals the piston cavity to divide it into two parts, front and back. The front part is connected to the pressurized hole, and the rear area is connected to the elbow joint. The leather cap can ensure that the position of the piston rod is not offset. The front end of the diaphragm is a raised structure, which cannot seal the airway 25 well, ensuring that there is no pressure relief during filling.

[0030] The centering device 3 is fixedly connected to the valve seat 21, and the lower end of the centering device 3 is connected to a centering cup seat 9, on which a centering cup 91 is provided, and a bottle mouth sealing gasket 92 is provided on the centering cup 91; a filling port 93 is provided at the material port 212 of the valve seat 21 corresponding to the centering cup 91, and the return air pipe 8 can pass through the filling port 93; the pressure relief valve 22 includes a valve core 221, a control valve cover 222, and a control valve body 223, and a valve body 223 is provided between the control valve body 223 and the control valve cover 222. There is a diaphragm 224, and the control valve body 223 and the control valve cover 222 are fixedly connected by a hexagonal screw 229. The valve core 221 is arranged in the control valve body 223, and a valve core spring 225 is sleeved on the rear end of the valve core 221. The end of the valve core 221 extending out of the control valve body 223 and located in the valve seat 21 is provided with a diaphragm 226. The pressure relief valve 22 is provided with a quick connector 227, and the pressure relief valve is fixed to the valve seat 21 by a hexagonal screw 228. The pressure relief valve releases the air pressure in the bottle after filling is completed.

[0031] In one embodiment, a retaining ring 111 is provided at the upper end of the liquid inlet sleeve 11 , and the retaining ring 111 is pressed on the upper end of the wine valve spring 13 . In order to facilitate the filling of materials in the liquid cylinder, a liquid inlet hole 112 is provided on the liquid inlet sleeve 11 .

[0032] In order to ensure the sealing of each connection part, an O-ring 461 is provided on the upper end of the bellows 46; an O-ring 461 is provided at the wine valve stem 12 at the upper end of the retaining ring 111; and an O-ring 461 is provided between the liquid valve stem 7 and the wine valve stem 12.

[0033] 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 mouth sealing gasket 92 is tightly fitted with the material port 212 on the valve seat 21. The bottle mouth and the bottle mouth sealing gasket 92 are tightly fitted and form a sealed whole with the filling valve through the bottle mouth sealing gasket 92 and the material port 212; after the filling bottle (not shown) is placed, the piston valve assembly 6 closes the airway 25 by applying pressure using the diaphragm 64, blocking the communication between the material port 212 and the pressurized hole 23. This is the state before filling. The purpose of this action is to seal the filling bottle and the valve seat; then the first vacuum is carried out through the pressure relief valve 22 to remove all the air in the bottle, and then the first back pressure is applied; the second vacuum is applied again, and then the second back pressure is applied; at this time, the preparation process before filling is completed, and then the filling procedure is carried out. During the filling process, the wine valve stem 12 is lifted by the cylinder control valve assembly 4, and the liquid valve stem 7 connected to the lower end of the wine valve stem 12 is opened, and the liquid in the liquid cylinder (not marked) flows into the filling bottle. After the filling is completed, the cylinder control valve assembly 4 presses the wine valve stem 12 downward, and the liquid The valve stem 7 closes the material port 212, forcibly closing the filling valve, and then starts the process of purging the residual liquid in the return air pipe 8; the pressure is applied through the pressure hole 23 on the valve seat 21. Before the pressure action, the pressure relief diaphragm 64 of the piston valve assembly 6 moves backward under the drive of the piston rod 61, opening the air channel 25, so that the pressure hole 23 is connected to the material port 212. The applied air pressure enters the filling bottle (not marked) connected to the material port 212 through the air channel 25. 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 cylinder, so as to promote the residual material in the return air pipe 8. The liquid returns to the liquid cylinder, and the valve needle rod 53 in the inflation valve 5 is lifted up and opened under the action of pressure, so that the channel between the liquid cylinder and the wine valve stem 12 is connected through the valve stem pin hole 14, and the residual liquid is discharged into the liquid cylinder through the valve stem pin hole 14 under the action of air pressure, solving the problem of liquid waste. At the same time, the return air pipe 8 and the wine valve stem 12 are also purged, thus eliminating the pre-blowing action before filling, and using high pressure to blow the residual liquid in the return air pipe 8 back into the liquid cylinder, and then open the pressure relief valve to release the pressure in the filling bottle and the airway 25, and the whole filling process is completed at this time.

[0034] The main purpose of the invention is to apply pressure to the filling bottle after the valve is forced to close, and the applied pressure is greater than the pressure in the liquid cylinder. Under the action of pressure, the liquid remaining in the return air pipe 8 is blown back into the liquid cylinder. The focus of the invention is that the liquid loss during the filling process is almost zero. For example, when a traditional filling valve fills a bottle of 500ML liquid, there will usually be a loss of 10-20ML of liquid. Forty thousand bottles of liquid can be filled in one hour. The present invention can reduce the loss of liquid, so the use of the present invention can greatly reduce the production cost; secondly, the pre-blowing process is omitted, which reduces the gas loss (equivalent to omitting the carbon dioxide purge), and since the residual liquid will not be blown out, the pollution of the work surface is reduced.

[0035] 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. An electronic filling valve, comprising a valve body assembly, a valve seat assembly and a centering device, the valve body assembly is mounted on the valve seat assembly, the valve seat assembly is mounted on the centering device, the upper end of the valve body assembly is provided with a cylinder control valve assembly, the cylinder control valve assembly comprises an upper cover, a lower cover and a cylinder sleeve mounted between the upper cover and the lower cover, the upper cover, the lower cover and the cylinder sleeve form a cavity, a piston is provided in the cavity, the upper cover is provided with an air inlet, a bellows is connected to the lower part of the lower cover, one end of the piston extends out of the cavity and extends into the bellows, the lower part of the bellows is connected to a dial sleeve; the valve body assembly comprises a liquid inlet sleeve and a wine valve stem arranged in the liquid inlet sleeve, the wine valve stem is sleeved with a wine valve spring; the valve seat assembly comprises a valve seat and a pressure relief valve arranged on the valve seat, the valve seat is provided with a material port, Its characteristics are: The air filling valve is provided on the dial sleeve, the upper end of the air filling valve is connected to the dial sleeve, and the lower part of the air filling valve is placed in the wine valve stem. The air filling valve comprises a sleeve, an air filling valve stem and a valve needle rod which are arranged in the sleeve and can move up and down. A compression spring is provided between the air filling valve stem and the valve needle rod, the front end of the valve needle rod extends out of the sleeve and the front end of the valve needle rod 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 valve needle rod; a valve stem pin hole corresponding to the front end of the valve needle rod is provided on the wine valve stem, and the valve stem pin hole is connected to the hollow structure inside the wine valve stem; A piston cavity is provided in the valve seat, and a piston valve assembly is installed in the piston cavity; a pressurized hole is provided at the bottom of the valve seat that is connected to the piston cavity, and the piston cavity is connected to the material port through an air channel; a bend pipe joint that is connected to the piston cavity is also provided on the upper part of the valve seat; the lower part of the wine valve stem is connected to the liquid valve stem, and the lower part of the liquid valve stem is connected to the return air pipe, and the return air pipe can pass through the filling port, and a diverter umbrella is provided on the return air pipe; a retaining ring is provided at the upper end of the liquid inlet sleeve, and the retaining ring is pressed on the upper end of the wine valve spring, and a liquid inlet hole is provided on the liquid inlet sleeve.

2. The electronic filling valve according to claim 1, characterized in that: A spacer is provided between the shifting sleeve and the wine valve stem, and a first spring is provided between the spacer and the shifting sleeve; the upper portion of the inflation valve stem passes through the spacer and is connected to the shifting sleeve, and the lower portion of the inflation valve stem is located in the sleeve.

3. The electronic filling valve according to claim 1, characterized in that: The centering device includes a centering guide rod and a roller shaft arranged on the centering guide rod. A roller is provided on the roller shaft, and a shaft retaining spring is clamped at the front end of the roller. A valve seat bushing is provided at the contact position between the valve seat and the centering device, and a spacer sleeve is provided between the valve seat and the roller.

4. The electronic filling valve according to claim 1, characterized in that: The piston valve assembly includes a piston rod, plug-ins and leather caps arranged at both ends of the piston rod; one end of the piston rod passes through the plug-in and is covered with a diaphragm, and the edge of the diaphragm is fixed at the junction of the inner wall of the valve seat and the plug-in; the other end of the piston rod passes through the leather cap and is covered with a displacer; a spring is covered on the piston rod between the plug-in and the leather cap.

5. The electronic filling valve according to claim 1, characterized in that: The centering device is fixedly connected to the valve seat, and the lower end of the centering device is connected to a centering cup seat, a centering cup is provided on the centering cup seat, and a bottle mouth sealing gasket is provided on the centering cup; the centering cup is provided with a filling port at the material port on the valve seat corresponding to the valve seat; the pressure relief valve includes a valve core, a control valve cover, and a control valve body, a diaphragm is provided between the control valve body and the control valve cover, the valve core is arranged in the control valve body, a valve core spring is sleeved on the rear end of the valve core, and a diaphragm is provided on the end of the valve core extending out of the control valve body and located in the valve seat, and a quick connector is provided on the pressure relief valve.

6. The electronic filling valve according to claim 1, characterized in that: An O-type sealing ring is sleeved on the upper end of the bellows; an O-type sealing ring is provided at the wine valve stem at the upper end of the retaining ring; and an O-type sealing ring is provided between the liquid valve stem and the wine valve stem.

7. The electronic filling valve according to claim 1, characterized in that: The lower end of the liquid valve stem is provided with a sealing gasket for sealing the material port.

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