A filling valve for aseptic filling

Abstract

The present invention discloses a filling valve for aseptic filling, which includes a valve body and a valve stem. Inside the valve body, a sterilization chamber and a positive pressure isolation chamber are distributed from top to bottom. The sterilization chamber and the positive pressure isolation chamber are isolated by an airtight seal. The valve body is provided with a sterilization medium input port, a sterilization medium output port, and a sterile air input port. Both the sterilization medium input port and the sterilization medium output port are communicated with the sterilization chamber, and the sterile air input port is communicated with the positive pressure isolation chamber. The valve body is also provided with a discharge chamber. One end of the valve stem is located in the discharge chamber and the valve stem is hermetically connected to the valve body in the discharge chamber. The discharge chamber is isolated from the positive pressure isolation chamber. The lower end of the discharge chamber forms a discharge port on the valve body. The valve body is provided with a feed channel on one side of the positive pressure isolation chamber. One end of the feed channel is communicated with the discharge chamber, and the other end of the feed channel forms a feed port on the surface of the valve body. The valve stem blocks one end of the feed channel to disconnect the communication between the feed port and the discharge port, and the valve stem disengages from one end of the feed channel to enable the communication between the feed port and the discharge port.

Description

Technical Field

[0001] The present invention relates to a filling device, and more particularly to a filling valve for aseptic filling.

Background Art

[0002] Existing filling valves for filling include a valve body and a valve stem. The valve stem is movably installed in the valve body. A valve cavity is provided in the valve body. A feed port is provided on the side wall of the valve cavity. The feed port is connected to an independently processed and formed feed pipe. The bottom of the valve cavity is open to form a discharge port. The valve stem slides in the valve cavity to connect or disconnect the feed port and the discharge port. In order to achieve aseptic production, a diaphragm is provided between the valve stem and the valve cavity in the prior art for aseptic isolation to prevent bacteria from entering the valve cavity and contaminating the material. However, since the valve stem slides up and down continuously when the filling valve is working, an inevitable gap will be generated between the rod body and the diaphragm. This gap is likely to cause bacteria to enter the valve cavity and contaminate the material, resulting in the deterioration of the material, thereby reducing the safety of aseptic production. In addition, the independent processing and forming of the feed pipe also increases the area of the feed pipe exposed to the external environment, resulting in many gaps between the feed pipe and the valve body. Bacteria are likely to grow in the gaps, further reducing the safety of aseptic production.

Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a filling valve for aseptic filling, which can improve the safety of aseptic filling production and prevent the material from being contaminated and deteriorated.

[0004] To solve the above technical problem, the present invention adopts the following technical solutions:

[0005] A filling valve for aseptic filling includes a valve body and a valve stem. The valve stem is movably installed in the valve body. A sterilization cavity and a positive pressure isolation cavity are distributed in the valve body from top to bottom. The valve stem passes through the sterilization cavity and the positive pressure isolation cavity. The sterilization cavity and the positive pressure isolation cavity are isolated by an airtight seal. The airtight seal is hermetically installed on the valve body and is hermetically connected to the valve stem. The valve body is provided with a sterilization medium input port, a sterilization medium output port, and a sterile air input port. The sterilization medium input port and the sterilization medium output port are both communicated with the sterilization cavity. The sterile air input port is communicated with the positive pressure isolation cavity. The valve body is further provided with a discharge cavity. One end of the valve stem is located in the discharge cavity and the valve stem is hermetically connected to the valve body in the discharge cavity. The discharge cavity is isolated from the positive pressure isolation cavity. The lower end of the discharge cavity forms a discharge port on the valve body. The valve body is further provided with a feed channel on one side of the positive pressure isolation cavity. One end of the feed channel is communicated with the discharge cavity. The other end of the feed channel forms a feed port on the surface of the valve body. The valve stem blocks one end of the feed channel to disconnect the communication between the feed port and the discharge port, and the valve stem disengages from one end of the feed channel to connect the feed port and the discharge port.

[0006] In the above-mentioned filling valve for aseptic filling, the feeding channel includes a vertical section and an inclined section. The upper end of the vertical section forms the feeding port, the lower end of the vertical section is communicated with the discharging cavity through the inclined section, and the end of the inclined section communicated with the vertical section is higher than the end of the inclined section communicated with the discharging cavity.

[0007] In the above-mentioned filling valve for aseptic filling, the inclined section penetrates through the vertical section and forms a processing port on the surface of the valve body, and a sealing cover for blocking the processing port is installed on the valve body.

[0008] In the above-mentioned filling valve for aseptic filling, a plurality of guiding ribs are circumferentially and spacedly protruded on the part of the valve stem located in the positive pressure isolation cavity, and the guiding ribs are in sliding contact with the wall of the positive pressure isolation cavity.

[0009] In the above-mentioned filling valve for aseptic filling, the valve stem includes an upper valve stem, a lower valve stem and a valve head which are connected in sequence from top to bottom. The upper valve stem penetrates through the sterilization cavity, the lower end of the lower valve stem extends into the discharging cavity and is connected with the valve head, and the valve head is used for opening and closing the discharging port.

[0010] In the above-mentioned filling valve for aseptic filling, a first conical surface which gradually contracts inwards from top to bottom is arranged at the lower end of the discharging cavity, the first conical surface encloses the discharging port, the valve head is provided with a second conical surface, and when the valve head closes the discharging port, the first conical surface and the second conical surface form an inclined surface seal.

[0011] In the above-mentioned filling valve for aseptic filling, the sterilization cavity is used for accommodating a sterilization medium, and the sterilization medium is vaporized hydrogen peroxide or high-temperature water vapor.

[0012] In the above-mentioned filling valve for aseptic filling, the feeding port is lower than the sterilization cavity.

[0013] In the above-mentioned filling valve for aseptic filling, a perforation is arranged at the top of the sterilization cavity, a through hole is arranged between the bottom of the sterilization cavity and the top of the positive pressure isolation cavity, the valve stem penetrates through the perforation and the through hole, and the air seal is a lip seal ring arranged between the perforation and the valve stem and between the through hole and the valve stem.

[0014] In the above-mentioned filling valve for aseptic filling, the lip seal ring includes a body and an elastic rubber ring. Annular V-shaped grooves are respectively arranged on the upper and lower end faces of the body, the elastic rubber ring is clamped in the V-shaped grooves, and the elastic rubber ring protrudes from the end face of the body.

[0015] Advantages of the present invention:

[0016] 1. When the filling valve for aseptic filling in the present invention is in use, sterile air is continuously introduced into the positive pressure isolation chamber. Since the valve stem is sealingly connected to the discharge chamber, it can effectively prevent the sterile air from flowing into the discharge chamber. At this time, the sterile air is encapsulated in the positive pressure isolation chamber. As the amount of sterile air increases, the air pressure in the positive pressure isolation chamber will gradually increase. Then, sterilizing gas is continuously introduced into the sterilization chamber through the sterilizing medium inlet, and the air pressure in the positive pressure isolation chamber is maintained greater than the air pressure in the sterilization chamber. At this time, the sterilizing gas in the sterilization chamber cannot penetrate into the positive pressure isolation chamber under the action of the pressure difference, thus avoiding the sterilizing gas from entering the positive pressure isolation chamber. At this time, all the sterilizing gas flows upward under the action of the pressure difference and sterilizes and disinfects part of the valve stem located in the sterilization chamber, and then is discharged from the sterilizing medium outlet. By sterilizing and disinfecting part of the valve stem in the sterilization chamber, it can prevent bacteria from being brought into the valve body and penetrating into the discharge chamber when the valve stem slides, thus preventing bacterial contamination of the material. It can be seen that through the gas sterilization barrier formed by the sterilizing gas and the positive pressure isolation barrier formed by the sterile air, a permanent aseptic isolation can be formed for the discharge chamber, thereby improving the safety of aseptic filling production and avoiding material contamination and deterioration. In addition, the feed channel in the present invention is integrally formed on the valve body. In this way, the area of the outer surface of the feed channel exposed to the outside can be reduced, and at the same time, the generation of gaps between the feed channel and the valve body can be avoided, thereby reducing the growth of bacteria and the number of bacteria, making the external environment where the filling valve is located close to an aseptic environment, and further improving the safety of aseptic filling production.

[0017] 2. The feed channel includes a vertical section and an inclined section. The upper end of the vertical section forms a feed port, and the lower end of the vertical section is communicated with the discharge chamber through the inclined section. The end of the inclined section communicated with the vertical section is higher than the end of the inclined section communicated with the discharge chamber. With such a design, not only can the inclined section guide the material to quickly enter the discharge chamber, but also the generation of cleaning dead corners in the feed channel can be avoided.

[0018] 3. The inclined section penetrates through the vertical section and forms a processing port on the surface of the valve body. A sealing cover for blocking the processing port is installed on the valve body. With such a design, the inclined section can be formed by drilling process, thereby reducing the processing difficulty of the inclined section.

[0019] 4. A plurality of guiding ribs are circumferentially and spacedly protruded on the part of the valve stem located in the positive pressure isolation chamber, and the guiding ribs are in sliding contact with the wall of the positive pressure isolation chamber. With such a design, the sliding of the valve stem can be guided through the cooperation between the guiding ribs and the wall of the positive pressure isolation chamber to avoid the valve stem from tilting and getting stuck.

[0020] 5. The valve stem includes an upper valve stem, a lower valve stem, and a valve head that are connected in sequence from top to bottom. The upper valve stem penetrates the sterilization chamber. The lower end of the lower valve stem extends into the discharge chamber and is connected to the valve head. The valve head is used to open and close the discharge port. With such a design, not only can the processing difficulty of the valve stem be reduced, but also the replacement of local parts is facilitated, thereby reducing the maintenance cost.

[0021] 6. The lower end of the discharge chamber is provided with a first conical surface that gradually contracts inward from top to bottom. The first conical surface encloses the discharge port. The valve head is provided with a second conical surface. When the valve head closes the discharge port, the first conical surface and the second conical surface form an inclined surface seal. With such a design, the contact area between the valve head and the lower end of the discharge chamber can be increased through the inclined surface seal, thereby increasing the sealing reliability between the two and preventing material leakage.

[0022] 7. The feed port is lower than the sterilization chamber. Since the sterilization medium is high-temperature gas, with such a design, the influence of high temperature on the material can be reduced.

[0023] 8. The top of the sterilization chamber is provided with a perforation. There is a through hole between the bottom of the sterilization chamber and the top of the positive pressure isolation chamber. The valve stem penetrates the perforation and the through hole. The gas seal is a lip seal ring provided between the perforation and the valve stem and between the through hole and the valve stem. With such a design, the sealing performance and service life of the gas seal can be improved.

[0024] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Description of the Drawings

[0025] The following further describes the present invention with reference to the drawings:

[0026] Figure 1 It is a state diagram of the filling valve in the preferred embodiment of the present invention when the valve stem disconnects the communication between the feed port and the discharge port;

[0027] Figure 2 It is a state diagram of the filling valve during filling in the preferred embodiment of the present invention;

[0028] Figure 3 It is a schematic structural diagram of the gas seal in the preferred embodiment of the present invention. Description of the Drawings:

[0030] 100, valve body; 110, sterilization chamber; 120, positive pressure isolation chamber; 130, sterilization medium inlet; 140, sterilization medium outlet; 150, sterile air inlet; 160, discharge chamber; 161, discharge port; 162, first conical surface; 170, feed channel; 171, vertical section; 1711, feed port; 172, inclined section; 200, valve stem; 210, upper valve stem; 220, lower valve stem; 221, guiding rib; 230, valve head; 231, second conical surface; 300, gas seal; 310, body; 320, elastic rubber ring; 330, mounting ring; 400, valve sleeve; 410, first annular groove; 411, first through hole; 420, second annular groove; 421, second through hole; 500, sealing cover.

Detailed implementation manners

[0031] The technical solutions of the embodiments of the present invention will be explained and described below with reference to the accompanying drawings of the embodiments of the present invention. However, the following embodiments are only the preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation manners, other embodiments obtained by those skilled in the art without creative efforts all fall within the protection scope of the present invention.

[0032] Refer to Figures 1 to 3 As shown, the filling valve for aseptic filling in this preferred embodiment includes a valve body 100 and a valve stem 200. The valve stem 200 is movably installed in the valve body 100. Inside the valve body 100, a sterilization chamber 110 and a positive pressure isolation chamber 120 are distributed from top to bottom. The sterilization chamber 110 is used to accommodate gaseous sterilization medium. The sterilization medium is vaporized hydrogen peroxide or high-temperature water vapor. Since the temperature of vaporized hydrogen peroxide is relatively low, in order to reduce the influence on the valve body 100 and the valve stem 200, the sterilization medium in this embodiment is preferably vaporized hydrogen peroxide. The valve stem 200 penetrates through the sterilization chamber 110 and the positive pressure isolation chamber 120. There is a perforation at the top of the sterilization chamber 110, and there is a through hole between the bottom of the sterilization chamber 110 and the top of the positive pressure isolation chamber 120. The valve stem 200 penetrates through the perforation and the through hole. Two gas seals 300 are also hermetically installed in the valve body 100. One of the gas seals 300 is arranged at the perforation and hermetically sleeved on the valve stem 200 to isolate the outside from the sterilization chamber 110, and the other gas seal 300 is arranged at the through hole and hermetically sleeved on the valve stem 200 to isolate the sterilization chamber 110 from the positive pressure isolation chamber 120.

[0033] The valve body 100 is further provided with a sterilization medium input port 130, a sterilization medium output port 140, and a sterile air input port 150. The sterilization medium input port 130 and the sterilization medium output port 140 are both communicated with the sterilization chamber 110, and the sterilization medium input port 130 is located below the sterilization medium output port 140. The sterile air input port 150 is communicated with the positive pressure isolation chamber 120. In addition, the valve body 100 is further provided with a discharge chamber 160 located below the positive pressure isolation chamber 120. The lower end of the valve rod 200 is located in the discharge chamber 160, and the valve rod 200 is hermetically connected to the valve body 100 in the discharge chamber 160 to prevent gas from entering the discharge chamber 160. The discharge chamber 160 and the positive pressure isolation chamber 120 are isolated by the hermetic connection between the valve rod 200 and the valve body 100. The lower end of the discharge chamber 160 forms a discharge port 161 on the valve body 100.

[0034] As Figure 1 and Figure 3 shown, in order to improve the sealing performance and service life of the gas seal 300, the gas seal 300 in this embodiment is preferably a pantograph seal ring, which includes a body 310, an elastic rubber ring 320, and a mounting ring 330 protruding from the outer peripheral side of the body 310. Annular V-shaped grooves are respectively provided on the upper and lower end faces of the body 310. The elastic rubber ring 320 is clamped in the V-shaped groove, and the elastic rubber ring 320 protrudes from the end face of the body 310. A valve sleeve 400 sleeved outside the valve rod 200 is provided in the sterilization chamber 110. Installation grooves are provided between the top of the valve sleeve 400 and the top wall of the sterilization chamber 110, and between the bottom of the valve sleeve 400 and the bottom wall of the sterilization chamber 110. The mounting ring 330 is clamped and fixed in the installation groove. During assembly, no additional fasteners are required to fix the mounting ring 330, which facilitates the disassembly and assembly of the pantograph seal ring. In addition, in this embodiment, a first annular groove 410 and a second annular groove 420 are provided on the outer side surface of the valve sleeve 400. The first annular groove 410 corresponds to the sterilization medium input port 130, so that a first flow gap can be formed between the first annular groove 410 and the inner wall of the valve body 100. A plurality of first through holes 411 are circumferentially spaced and radially penetrate through the side wall of the valve sleeve 400. The first through holes 411 communicate the first flow gap and the inside of the valve sleeve 400. The second annular groove 420 corresponds to the sterilization medium output port 140, so that a second flow gap can be formed between the second annular groove 420 and the inner wall of the valve body 100. A plurality of second through holes 421 are circumferentially spaced and radially penetrate through the side wall of the valve sleeve 400. The second through holes 421 communicate the second flow gap and the inside of the valve sleeve 400. Thus, the sterilization medium can flow into the valve sleeve 400 to sterilize the valve rod 200.

[0035] In addition, a feed channel 170 is provided on the valve body 100 in this embodiment on one side of the positive pressure isolation chamber 120. The feed channel 170 includes a vertical section 171 and an inclined section 172. The upper end of the vertical section 171 forms a feed port 1711 on the surface of the valve body 100, and the feed port 1711 is lower than the sterilization chamber 110. Since the vaporized hydrogen peroxide is a high-temperature gas, such a design can reduce the influence of high temperature on the material. The lower end of the vertical section 171 is connected to the discharge chamber 160 through the inclined section 172. The upper end of the inclined section 172 is connected to the lower end of the vertical section 171, and the lower end of the inclined section 172 is connected to the discharge chamber 160. Such a design can not only guide the material to quickly enter the discharge chamber 160 through the inclined section 172, but also avoid the generation of cleaning dead corners in the feed channel 170. For the convenience of the processing and forming of the inclined section 172, in this embodiment, the upper end of the inclined section 172 penetrates through the vertical section 171 and forms a processing port on the surface of the valve body 100, and a sealing cover 500 for blocking the processing port is installed on the valve body 100. Such a design enables the inclined section 172 to be processed and formed by drilling, thereby reducing the processing difficulty of the inclined section 172.

[0036] Secondly, the valve stem 200 in this embodiment includes an upper valve stem 210, a lower valve stem 220, and a valve head 230 that are sequentially connected from top to bottom. The upper valve stem 210 penetrates through the sterilization chamber 110, and the lower end of the upper valve stem 210 extends into the positive pressure isolation chamber 120 and is threadedly connected to the upper end of the lower valve stem 220. The lower end of the lower valve stem 220 extends into the discharge chamber 160 and is threadedly connected to the valve head 230. The valve head 230 is used to open and close the discharge port 161. Such a design can not only reduce the processing difficulty of the valve stem 200, but also facilitate the replacement of local parts to reduce the maintenance cost.

[0037] In order to improve the sealing performance when the valve head 230 closes the discharge port 161, in this embodiment, a first conical surface 162 that gradually contracts inward from top to bottom is provided at the lower end of the discharge chamber 160. The first conical surface 162 encloses the discharge port 161. The valve head 230 is provided with a second conical surface 231. When the valve head 230 closes the discharge port 161, the first conical surface 162 and the second conical surface 231 form an inclined surface seal. Thus, through the inclined surface seal, the contact area between the valve head 230 and the lower end of the discharge chamber 160 can be increased, thereby increasing the sealing reliability of the two and avoiding material leakage.

[0038] In addition, in order to prevent the valve stem 200 from getting stuck with the valve body 100 when sliding up and down, in this embodiment, a plurality of guiding ribs 221 are circumferentially and spacedly protruded on the part of the lower valve stem 220 located in the positive pressure isolation chamber 120, and the guiding ribs 221 are in sliding contact with the wall of the positive pressure isolation chamber 120. Such a design can guide the sliding of the valve stem 200 through the cooperation between the guiding ribs 221 and the wall of the positive pressure isolation chamber to ensure the coaxiality of the valve stem 200 and the valve body 100, thereby avoiding the phenomenon of the valve stem 200 getting stuck due to inclination.

[0039] As Figure 1 shown, when the filling valve in this embodiment is in use and the drive valve stem 200 slides downward to block the discharge port 161, the lower end of the inclined section 172 will be blocked simultaneously. At this time, the communication between the feed port 1711 and the discharge port 161 can be disconnected. And when the drive valve stem 200 slides upward and disengages from the lower end of the inclined section 172, as Figure 2 shown, at this time, the feed port 1711 is communicated with the discharge port 161 through the feed channel 170 and the discharge cavity 160, and then the container is filled.

[0040] During the filling process, sterile air is continuously introduced into the positive pressure isolation chamber 120 through the sterile air input port 150. Since the valve stem 200 is hermetically connected to the discharge cavity 160, it can effectively prevent sterile air from flowing into the discharge cavity 160. At this time, the sterile air is encapsulated in the positive pressure isolation chamber 120. As the amount of sterile air increases, the air pressure in the positive pressure isolation chamber 120 will gradually increase. Then, vaporized hydrogen peroxide is continuously introduced into the sterilization chamber 110 through the sterilization medium input port 130, and the air pressure in the positive pressure isolation chamber 120 is kept greater than the air pressure in the sterilization chamber 110. At this time, the vaporized hydrogen peroxide in the sterilization chamber 110 cannot penetrate into the positive pressure isolation chamber 120 under the action of the pressure difference, thus avoiding the vaporized hydrogen peroxide entering the positive pressure isolation chamber 120. At this time, all the vaporized hydrogen peroxide flows upward under the action of the pressure difference and sterilizes and disinfects a part of the valve stem 200 located in the sterilization chamber 110, and then is discharged from the sterilization medium output port 140. By sterilizing and disinfecting a part of the valve stem 200 in the sterilization chamber 110, it can prevent bacteria from being brought into the valve body 100 when the valve stem 200 slides and penetrating into the discharge cavity 160, thereby preventing bacterial contamination of the material. It can be seen that through the gas sterilization barrier formed by vaporized hydrogen peroxide and the positive pressure isolation barrier formed by sterile air, a permanent sterile isolation can be formed for the discharge cavity 160, thereby improving the safety of aseptic filling production and avoiding material contamination and deterioration; in addition, the feed channel 170 in this embodiment is integrally formed on the valve body 100. In this way, the area of the outer surface of the feed channel 170 exposed to the outside can be reduced, and at the same time, the gap between the feed channel 170 and the valve body 100 can be avoided, thereby reducing the growth of bacteria and the number of bacteria, making the external environment where the filling valve is located close to a sterile environment, thereby further improving the safety of aseptic filling production.

[0041] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the content described in the drawings and the above specific implementation manner. Any modification that does not deviate from the functional and structural principles of the present invention will be included in the scope of the claims.

Claims

1. A filling valve for aseptic filling, comprising a valve body and a valve stem, the valve stem is movably installed in the valve body, Characterized in that: An aseptic chamber and a positive pressure isolation chamber are distributed from top to bottom inside the valve body, the valve stem passes through the aseptic chamber and the positive pressure isolation chamber, the aseptic chamber and the positive pressure isolation chamber are isolated by a gas seal, the gas seal is sealed and installed on the valve body and is hermetically connected to the valve stem, the valve body is provided with a sterilization medium input port, a sterilization medium output port and a sterile air input port, the sterilization medium input port and the sterilization medium output port are both communicated with the aseptic chamber, the sterile air input port is communicated with the positive pressure isolation chamber, the valve body is further provided with a discharge chamber, one end of the valve stem is located in the discharge chamber and the valve stem is hermetically connected to the valve body in the discharge chamber, the discharge chamber is isolated from the positive pressure isolation chamber, the lower end of the discharge chamber forms a discharge port on the valve body, the valve body is further provided with a feed channel on one side of the positive pressure isolation chamber, one end of the feed channel is communicated with the discharge chamber, the other end of the feed channel forms a feed port on the surface of the valve body, the valve stem blocks one end of the feed channel to disconnect the communication between the feed port and the discharge port, the valve stem disengages from one end of the feed channel to enable the communication between the feed port and the discharge port, a perforation is provided at the top of the aseptic chamber, a through hole is provided between the bottom of the aseptic chamber and the top of the positive pressure isolation chamber, the valve stem penetrates through the perforation and the through hole, the gas seal is a pantograph seal ring provided between the perforation and the valve stem and between the through hole and the valve stem, the pantograph seal ring includes a body and an elastic rubber ring, annular V-shaped card slots are respectively provided on the upper and lower end faces of the body, the elastic rubber ring is clamped in the V-shaped card slot, and the elastic rubber ring protrudes from the end face of the body.

2. A filling valve for aseptic filling according to claim 1, Characterized in that, The feed channel includes a vertical section and an inclined section, the upper end of the vertical section forms the feed port, the lower end of the vertical section is communicated with the discharge chamber through the inclined section, and the end of the inclined section communicated with the vertical section is higher than the end of the inclined section communicated with the discharge chamber.

3. A filling valve for aseptic filling according to claim 2, Characterized in that, The inclined section penetrates through the vertical section and forms a processing port on the surface of the valve body, and a sealing cover for blocking the processing port is installed on the valve body.

4. A filling valve for aseptic filling according to claim 1, Characterized in that, A plurality of guiding ribs are circumferentially and spacedly protruded on the part of the valve stem located in the positive pressure isolation chamber, and the guiding ribs are in sliding contact with the wall of the positive pressure isolation chamber.

5. A filling valve for aseptic filling according to claim 4, Characterized in that, The valve stem includes an upper valve stem, a lower valve stem and a valve head which are connected in sequence from top to bottom, the upper valve stem penetrates through the aseptic chamber, the lower end of the lower valve stem extends into the discharge chamber and is connected to the valve head, and the valve head is used to open and close the discharge port.

6. A filling valve for aseptic filling according to claim 5, Characterized in that, The lower end of the discharge chamber is provided with a first conical surface that gradually contracts inward from top to bottom. The first conical surface encloses the discharge port. The valve head is provided with a second conical surface. When the valve head closes the discharge port, the first conical surface and the second conical surface form an inclined surface seal.

7. A filling valve for aseptic filling according to claim 1, characterized in that the sterilization chamber is used to accommodate a sterilization medium, and the sterilization medium is vaporized hydrogen peroxide or high-temperature steam.

8. A filling valve for aseptic filling according to claim 1, characterized in that the feed port is lower than the sterilization chamber.

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