A rotary valve for aseptic filling

Abstract

The present invention discloses a rotary valve for aseptic filling, which comprises a valve body and a valve stem rotatably mounted on the valve body. The valve body is provided with a valve cavity. The valve stem includes a rod body and a valve head. The valve cavity includes a sterilization cavity, a positive pressure isolation cavity and a discharge cavity which are distributed from top to bottom. The sterilization cavity and the positive pressure isolation cavity are isolated by a gas seal. The side wall of the sterilization cavity is provided with a vaporized hydrogen peroxide outlet and a vaporized hydrogen peroxide inlet from top to bottom. The rod body penetrates through the sterilization cavity. The side wall of the positive pressure isolation cavity is provided with a sterile air inlet. A valve port is provided between the discharge cavity and the positive pressure isolation cavity. The valve stem moves axially to open and close the valve port by the valve head. During filling, the valve head is located in the discharge cavity and closes the valve port. Part of the rod body is located in the positive pressure isolation cavity. The side wall of the discharge cavity is provided with a feed inlet. The bottom end of the discharge cavity is provided with a discharge outlet. The valve head is provided with a discharge channel which has an inlet and an outlet. The outlet is communicated with the discharge outlet. The inlet is arranged on the side surface of the valve head. Rotating the valve stem can make the inlet communicate with the feed inlet or make the valve head block the feed inlet.

Description

[Technical field]

[0001] The invention relates to a filling device, in particular to a rotary valve for aseptic filling. [Background technology]

[0002] The existing rotary valve for filling includes a valve body and a valve stem rotatably mounted on the valve body, the valve body is provided with a valve cavity, the valve stem includes a rod body and a valve head connected to the bottom of the rod body, the rod body passes through the valve cavity and is connected to a driving mechanism, the rod head is located in the valve cavity, a feed port is provided on the side wall of the valve cavity, a discharge port is provided at the bottom of the valve cavity, and a discharge channel is provided in the valve head, the discharge channel has an inlet and an outlet, the outlet is connected with the discharge port, and the inlet is provided on the side of the valve head. When the driving mechanism drives the valve stem to rotate so that the inlet corresponds to the feed port, the feed port and the discharge port are connected through the discharge channel, at which time the filling of the material can be realized, and when the driving mechanism drives the valve stem to rotate so that the valve head blocks the feed port, the feed port is disconnected from 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 is continuously rotating when the rotary valve is working, a gap is inevitably generated between the stem body and the diaphragm. This gap can easily lead to bacteria entering the valve cavity and contaminating the material, causing the material to deteriorate, thereby 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 rotary valve for aseptic filling, which can improve the safety of aseptic filling production and prevent materials from being contaminated and deteriorating.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A rotary valve for aseptic filling, comprising a valve body and a valve stem rotatably mounted on the valve body, the valve body being provided with a valve cavity, the valve stem comprising a stem body and a valve head connected to the bottom of the stem body, the valve cavity comprising a sterilization cavity, a positive pressure isolation cavity and a discharge cavity distributed from top to bottom, the sterilization cavity and the positive pressure isolation cavity being isolated by an air seal, the side wall of the sterilization cavity being provided with a gasified hydrogen peroxide outlet and a gasified hydrogen peroxide inlet from top to bottom, the stem body passing through the sterilization cavity, the side wall of the positive pressure isolation cavity being provided with a sterile air inlet, and a gasifier is provided between the discharge cavity and the positive pressure isolation cavity A valve port is provided, and the valve stem moves axially to enable the valve head to open and close the valve port. During filling, the valve head is located in the discharge chamber and closes the valve port, and part of the stem body is located in the positive pressure isolation chamber. A feed port is provided on the side wall of the discharge chamber, and a discharge port is provided at the bottom end of the discharge chamber. A discharge channel is provided in the valve head, and the discharge channel has an inlet and an outlet, and the outlet is connected with the discharge port. The inlet is provided on the side of the valve head, and rotating the valve stem can connect the inlet with the feed port or cause the valve head to block the feed port.

[0006] In the above-mentioned rotary valve for aseptic filling, a sealing boss is provided between the positive pressure isolation chamber and the discharge chamber, the top surface of the sealing boss forms a first conical surface which gradually shrinks inward from top to bottom, the first conical surface surrounds the valve port, the valve head is provided with a second conical surface, and when the valve head closes the valve port, the first conical surface and the second conical surface form a bevel seal.

[0007] In the above-mentioned rotary valve for aseptic filling, the valve body includes a stainless steel shell and a ceramic core installed in the stainless steel shell, the discharge cavity is arranged on the ceramic core, and the sealing boss is arranged on the inner side surface of the ceramic core.

[0008] In the above-mentioned rotary valve for aseptic filling, a through hole is provided on the top of the sterilization chamber, a connecting hole is provided between the sterilization chamber and the positive pressure isolation chamber, the rod body passes through the through hole and the connecting hole, and the air sealing member is a pan-seal ring provided between the through hole and the rod body and between the connecting hole and the rod body.

[0009] In the above-mentioned rotary valve for aseptic filling, the pan seal ring includes a body and an elastic rubber ring, and the upper and lower end surfaces of the body are respectively provided with annular V-shaped grooves, the elastic rubber ring is clamped in the V-shaped groove, and the elastic rubber ring protrudes from the end surface of the body.

[0010] In the above-mentioned rotary valve for aseptic filling, the pan-seal seal ring also includes a mounting ring protruding on the outer peripheral side of the body, a valve sleeve sleeved on the outer side of the rod body is provided in the sterilization chamber, the mounting ring is clamped and fixed between the end face of the valve sleeve and the wall of the sterilization chamber, and a first through hole and a second through hole are radially connected to the side wall of the valve sleeve, the first through hole is connected to the gasified hydrogen peroxide outlet, and the second through hole is connected to the gasified hydrogen peroxide inlet.

[0011] In the above-mentioned rotary valve for aseptic filling, a partition is further provided in the valve cavity, the communicating hole is provided on the partition, and the partition sets an upper limit on the valve head.

[0012] In the above-mentioned rotary valve for aseptic filling, a threaded hole is provided on the bottom surface of the rod body, a screw threadedly connected to the threaded hole is convexly provided on the top surface of the valve head, a pin shaft radially penetrates the rod body and the screw, and a sealing ring is clamped between the top surface of the valve head and the bottom surface of the rod body.

[0013] In the above-mentioned rotary valve for aseptic filling, the valve head is a plastic valve head.

[0014] In the above-mentioned rotary valve for aseptic filling, the rotary valve for aseptic filling further includes a feed pipe which is independently processed and formed, and the feed pipe is connected to the feed port.

[0015] Beneficial effects of the present invention:

[0016] 1. When the rotary valve for aseptic filling in the present invention is used, sterile air is first continuously introduced into the positive pressure isolation chamber. Since the valve port is in a closed state, the air pressure in the positive pressure isolation chamber will gradually increase with the increase of the amount of sterile air. Then, gasified hydrogen peroxide is continuously introduced into the sterilization chamber through the gasified hydrogen peroxide inlet, and the air pressure in the positive pressure isolation chamber is kept greater than the air pressure in the sterilization chamber. At this time, the gasified hydrogen peroxide in the sterilization chamber cannot penetrate into the positive pressure isolation chamber under the action of the pressure difference, thereby preventing the gasified hydrogen peroxide from entering the discharge chamber and damaging the material; while the gasified hydrogen peroxide in the sterilization chamber flows upward under the action of the pressure difference and The part of the rod body located in the sterilization chamber is sterilized and disinfected, and then discharged from the vaporized hydrogen peroxide outlet. By sterilizing and disinfecting the rod body in the sterilization chamber, bacteria can be prevented from entering the positive pressure isolation chamber, thereby preventing bacteria from entering the discharge chamber and contaminating the valve head. It can be seen that although there is a movable gap between the valve stem and the valve body, the movable gap is to enable the valve stem to move axially and rotate, but the gas sterilization barrier formed by vaporized hydrogen peroxide and the positive pressure isolation barrier formed by sterile air can form a permanent sterile isolation for the discharge chamber, thereby improving the safety of aseptic filling production and avoiding material contamination and deterioration.

[0017] 2. A sealing boss is provided between the positive pressure isolation chamber and the discharge chamber. The top surface of the sealing boss forms a first cone surface that gradually shrinks inward from top to bottom. The first cone surface surrounds the valve port. The valve head is provided with a second cone surface. When the valve head closes the valve port, the first cone surface and the second cone surface form an inclined surface seal. The inclined surface seal can increase the contact area between the valve head and the sealing boss, thereby increasing the sealing reliability of the two, thereby preventing sterile air from entering the discharge chamber.

[0018] 3. The valve body includes a stainless steel shell and a ceramic core installed in the stainless steel shell. The discharge cavity is arranged on the ceramic core, and the sealing boss is arranged on the inner side of the ceramic core. Since the vaporized hydrogen peroxide is in a high temperature state, its heat will be transferred to the valve body and the valve stem. If the valve body is made of metal parts, the metal parts are easily deformed due to heat. When the valve body is deformed, the gap between the valve head and the wall of the discharge cavity will expand, resulting in a poor sealing effect between the valve head and the wall of the discharge cavity, which is prone to leakage. However, the ceramic core is used in this technical solution. Since ceramics are not easily deformed by heat, the gap between the valve head and the wall of the discharge cavity is avoided. Therefore, the sealing effect between the two is guaranteed, and leakage is avoided.

[0019] 4. A perforation is provided on the top of the sterilization chamber, a connecting hole is provided between the sterilization chamber and the positive pressure isolation chamber, the rod body passes through the perforation and the connecting hole, and the air seal is a pan-seal ring provided between the perforation and the rod body and between the connecting hole and the rod body. This design can improve the sealing performance and service life of the air seal, thereby preventing gasified hydrogen peroxide from leaking from the perforation and the connecting hole.

[0020] 5. The Variseal seal ring includes a body and an elastic rubber ring. The upper and lower end surfaces of the body are respectively provided with annular V-shaped grooves. The elastic rubber ring is clamped in the V-shaped groove, and the elastic rubber ring protrudes from the end surface of the body. This design can further improve the sealing performance between the Variseal seal ring and the rod body.

[0021] 6. The Pan-Seal seal also includes a mounting ring protruding on the outer peripheral side of the body, a valve sleeve sleeved on the outside of the rod body is provided in the sterilization chamber, the mounting ring is clamped and fixed between the end face of the valve sleeve and the wall of the sterilization chamber, and the side wall of the valve sleeve is provided with a first through hole and a second through hole that penetrate radially, the first through hole is connected to the outlet of the vaporized hydrogen peroxide, and the second through hole is connected to the inlet of the vaporized hydrogen peroxide. With such a design, during assembly, no additional fasteners are required to fix the mounting ring, and the mounting ring can be fixed by clamping the valve sleeve and the wall of the sterilization chamber, thereby facilitating the disassembly and assembly of the Pan-Seal seal.

[0022] 7. A threaded hole is provided on the bottom surface of the rod body, a screw connected to the threaded hole is convexly provided on the top surface of the valve head, a pin radially penetrates the rod body and the screw, and a sealing ring is sandwiched between the top surface of the valve head and the bottom surface of the rod body. With this design, the rod body and the valve head can be independently processed and formed, and then the valve stem can be formed by later assembly. Compared with the method of integrally processing the valve stem, this design can effectively reduce the processing difficulty of the valve stem, thereby reducing the processing cost.

[0023] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0024] The present invention will be further described below in conjunction with the accompanying drawings:

[0025] Figure 1 It is a cross-sectional view of the aseptic filling rotary valve in the preferred embodiment of the present invention when not filling;

[0026] Figure 2 for Figure 1 A is a partial enlarged schematic diagram;

[0027] Figure 3 It is a cross-sectional view of the rotary valve for aseptic filling during cleaning in the preferred embodiment of the present invention. Description of the drawings:

[0029] 100, valve body; 101, stainless steel shell; 102, ceramic core; 110, sterilization chamber; 111, perforation; 112, gasified hydrogen peroxide outlet; 113, gasified hydrogen peroxide inlet; 120, positive pressure isolation chamber; 121, sterile air inlet; 130, discharge chamber; 131, feed inlet; 132, discharge outlet; 140, connecting hole; 150, valve port; 160, sealing boss; 161, A conical surface; 200, valve stem; 210, rod body; 220, valve head; 221, discharge channel; 222, second conical surface; 300, air sealing member; 310, body; 320, elastic rubber ring; 330, mounting ring; 400, feed pipe; 500, valve sleeve; 510, first annular groove; 511, first through hole; 520, second annular groove; 521, second through hole; 600, partition. [Specific implementation method]

[0030] The technical solutions of the embodiments of the present invention are explained and described below in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0031] Reference Figures 1 to 3As shown in the figure, the rotary valve for aseptic filling in this preferred embodiment includes a valve body 100 and a valve stem 200. The valve body 100 includes an upper valve body, a middle valve body, and a lower valve body that are sequentially sealed and connected. The valve body 100 is provided with a valve cavity, and the valve cavity includes a sterilization cavity 110, a positive pressure isolation cavity 120, and a discharge cavity 130 that are distributed from top to bottom. The sterilization cavity 110 is arranged in the upper valve body, the positive pressure isolation cavity 120 is arranged in the middle valve body, and the discharge cavity 130 is arranged in the lower valve body. A perforation 111 communicating with the sterilization cavity 110 is provided at the top of the upper valve body, and a partition plate 600 is clamped and fixed between the upper valve body and the middle valve body. A communication hole 140 communicating the sterilization cavity 110 with the positive pressure isolation cavity 120 is provided on the partition plate 600. The valve stem 200 includes a rod body 210 and a valve head 220. The valve head 220 is a plastic valve head. A threaded hole is provided on the bottom surface of the rod body 210, and a screw rod threadedly connected to the threaded hole protrudes from the top surface of the valve head 220. A pin shaft radially penetrates the rod body 210 and the screw rod to prevent the valve head 220 from rotating relative to the rod body 210. A sealing ring is clamped between the top surface of the valve head 220 and the bottom surface of the rod body 210. The outer diameter of the valve head 220 is larger than the communication hole 140, so that the partition plate 600 provides an upper limit for the valve head 220. The rod body 210 penetrates through the sterilization cavity 110. Gas seals 300 are respectively provided at the perforation 111 and the communication hole 140 and are hermetically sleeved on the rod body 210. The gas seal 300 provided at the perforation 111 isolates the sterilization cavity 110 from the outside, and the gas seal 300 provided at the communication hole 140 isolates the sterilization cavity 110 from the positive pressure isolation cavity 120. In this embodiment, a vaporized hydrogen peroxide outlet 112 and a vaporized hydrogen peroxide inlet 113 are provided on the side wall of the sterilization cavity 110 from top to bottom, and a sterile air inlet 121 is provided on the side wall of the positive pressure isolation cavity 120. A valve port 150 is provided between the discharge cavity 130 and the positive pressure isolation cavity 120. The valve stem 200 can move axially relative to the valve body 100, and the valve head 220 can open and close the valve port 150 through the axial movement of the valve stem 200.

[0032] In addition, in this embodiment, a feed port 131 is provided on the side wall of the discharge cavity 130. The rotary valve further includes an independently processed and formed feed pipe 400, and the feed pipe 400 is connected to the feed port 131. A discharge port 132 is provided at the bottom end of the discharge cavity 130. A discharge channel 221 is provided in the valve head 220. The discharge channel 221 has an inlet and an outlet that opens downward. The outlet is always in communication with the discharge port 132, and the inlet is provided on the side surface of the valve head 220. During filling, the valve stem 200 is driven to move axially downward so that the valve head 220 is located in the discharge cavity 130 and is in a state of closing the valve port 150. At this time, part of the rod body 210 is located in the positive pressure isolation cavity 120. Then, the valve stem 200 is rotated so that the inlet communicates with the feed port 131 correspondingly. At this time, the material in the feed pipe 400 is discharged through the outlet of the discharge channel 221. When filling is not required (such as Figure 1 and 2As shown in the figure, rotate the valve stem 200 to stagger the inlet from the feed port 131, that is, block the feed port 131 with the valve head 220, thereby disconnecting the communication between the feed pipe 400 and the discharge channel 221.

[0033] In order to achieve aseptic filling, in this embodiment, when the rotary valve is in the filling state, sterile air is continuously introduced into the positive pressure isolation chamber 120. Since the valve port 150 is in the closed state, 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 vaporized hydrogen peroxide inlet 113, and the air pressure in the positive pressure isolation chamber 120 is maintained 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, thereby preventing the vaporized hydrogen peroxide from entering the discharge chamber 130 and damaging the material. The vaporized hydrogen peroxide in the sterilization chamber 110 flows upward under the action of the pressure difference and sterilizes part of the rod body 210 located in the sterilization chamber 110, and then is discharged from the vaporized hydrogen peroxide outlet 112. By sterilizing the rod body 210 in the sterilization chamber 110, bacteria can be prevented from entering the positive pressure isolation chamber 120, thereby preventing bacteria from entering the discharge chamber 130 and contaminating the valve head 220. It can be seen that although there is an activity gap between the valve stem 200 and the valve body 100, this activity gap is for the valve stem 200 to axially move and rotate. However, based on the gas sterilization barrier formed by vaporized hydrogen peroxide and the positive pressure isolation barrier formed by sterile air, a permanent aseptic isolation can be formed for the discharge chamber 130, thereby improving the safety of aseptic filling production and preventing the material from being contaminated and deteriorated.

[0034] In order to facilitate the discharge of vaporized hydrogen peroxide from the vaporized hydrogen peroxide outlet 112, in this embodiment, the vaporized hydrogen peroxide outlet 112 is under negative pressure suction. At this time, the air pressure at the vaporized hydrogen peroxide outlet 112 is less than the air pressure at the vaporized hydrogen peroxide inlet 113, and the vaporized hydrogen peroxide naturally flows upward and is discharged from the vaporized hydrogen peroxide outlet 112 under the action of the pressure difference.

[0035] Since the vaporized hydrogen peroxide is in a high-temperature state, its heat will be transferred to the valve body 100 and the valve stem 200. If the lower valve body is made of a metal part, since the metal part is prone to deformation when heated, after the lower valve body is deformed, the gap between the valve head 220 and the wall of the discharge chamber 130 will expand, resulting in a poor sealing effect between the valve head 220 and the wall of the discharge chamber 130 and prone to material leakage. In order to prevent the above phenomenon from occurring, the lower valve body in this embodiment includes a stainless steel outer shell 101 and a ceramic inner core 102 installed in the stainless steel outer shell 101. The discharge chamber 130 is provided on the ceramic inner core 102. Since the ceramic is not prone to deformation when heated, the expansion of the gap between the valve head 220 and the wall of the discharge chamber 130 is avoided, thereby ensuring the sealing effect between the two and preventing the occurrence of material leakage.

[0036] Preferably, in order to improve the sealing performance of the valve head 220 closing the valve port 150 to prevent sterile air from entering the discharge chamber 130, a sealing boss 160 is provided between the positive pressure isolation chamber 120 and the discharge chamber 130 in this embodiment. The sealing boss 160 is provided on the inner side surface of the ceramic inner core 102. The top surface of the sealing boss 160 forms a first tapered surface 161 that gradually contracts inward from top to bottom. The first tapered surface 161 encloses the valve port 150. The valve head 220 is provided with a second tapered surface 222. When the valve head 220 closes the valve port 150, the second tapered surface 222 closely adheres to the first tapered surface 161 and forms an inclined surface seal with the first tapered surface 161. Through the inclined surface seal, the contact area between the valve head 220 and the sealing boss 160 can be increased, thereby increasing the sealing reliability of the two and preventing sterile air from entering the discharge chamber; in addition, the sealing boss 160 protrudes from the inner side surface of the ceramic inner core 102, which can prevent the sealing boss 160 from deforming, and further ensures the sealing performance when the valve head 220 closes the valve port 150.

[0037] In addition, in order to improve the sealing performance between the gas seal 300 and the rod body 210 and extend the service life of the gas seal 300, the gas seal 300 in this embodiment is a Teflon seal ring. The Teflon seal ring 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 surfaces of the body 310. The elastic rubber ring 320 is clamped in the V-shaped grooves, and the elastic rubber ring 320 protrudes from the end surface of the body 310. A valve sleeve 500 sleeved on the outer side of the rod body 210 is provided in the sterilization chamber 110. The valve sleeve 500 is clamped and fixed between the partition plate 600 and the top wall of the sterilization chamber 110. Installation grooves are provided between the top of the valve sleeve 500 and the top wall of the sterilization chamber 110 and between the bottom of the valve sleeve 500 and the top surface of the partition plate 600. The mounting ring 330 is clamped and fixed in the installation grooves. When assembling, no additional fasteners are required to fix the mounting ring 330, which facilitates the disassembly and assembly of the Teflon seal ring; in addition, a first annular groove 510 and a second annular groove 520 are provided on the outer side surface of the valve sleeve 500 in this embodiment. The first annular groove 510 corresponds to the vaporized hydrogen peroxide outlet 112, so that a first flow gap can be formed between the first annular groove 510 and the inner wall of the valve body 100. A plurality of first through holes 511 that are circumferentially spaced and radially penetrate are further provided on the side wall of the valve sleeve 500. The first through holes 511 communicate the first flow gap and the inside of the valve sleeve 500. The second annular groove 520 corresponds to the vaporized hydrogen peroxide inlet 113, so that a second flow gap can be formed between the second annular groove 520 and the inner wall of the valve body 100. A plurality of second through holes 521 that are circumferentially spaced and radially penetrate are further provided on the side wall of the valve sleeve 500. The second through holes 521 communicate the second flow gap and the inside of the valve sleeve 500. Thus, vaporized hydrogen peroxide can flow into the valve sleeve 500 to sterilize the rod body 210.

[0038] Finally, as Figure 3 shown, when the valve cavity needs to be cleaned, a wastewater treatment system is connected to the discharge port 132, the valve stem 200 is driven to move axially upward to open the valve port 150. At this time, the cleaning agent enters from the sterile air inlet 121 to clean the positive pressure isolation cavity 120, the discharge cavity 130, and the valve head 220, and the wastewater after cleaning is discharged into the wastewater treatment system.

[0039] It can be understood that in other embodiments of the present invention, the lower valve body is made of stainless steel.

[0040] It can be understood that in other embodiments of the present invention, the rod body and the valve head are integrally processed.

[0041] It can be understood that in other embodiments of the present invention, the valve sleeve can be omitted. At this time, an annular clamping groove is provided on the inner wall of the upper valve body, and the installation ring is clamped in the clamping groove to fix the pantograph seal ring.

[0042] 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 rotary valve for aseptic filling, comprising a valve body and a valve stem rotatably mounted on the valve body. The valve body is provided with a valve cavity. The valve stem includes a rod body and a valve head connected to the bottom of the rod body. It is characterized in that the valve cavity includes a sterilization cavity, a positive pressure isolation cavity and a discharge cavity distributed from top to bottom. The sterilization cavity and the positive pressure isolation cavity are isolated by a gas seal. The side wall of the sterilization cavity is provided with a vaporized hydrogen peroxide outlet and a vaporized hydrogen peroxide inlet from top to bottom. The rod body penetrates through the sterilization cavity. The side wall of the positive pressure isolation cavity is provided with a sterile air inlet. A valve port is provided between the discharge cavity and the positive pressure isolation cavity. The valve stem moves axially to open and close the valve port by the valve head. During filling, the valve head is located in the discharge cavity and closes the valve port. Part of the rod body is located in the positive pressure isolation cavity. The side wall of the discharge cavity is provided with a feed port. The bottom end of the discharge cavity is provided with a discharge port. The valve head is provided with a discharge channel having an inlet and an outlet. The outlet is communicated with the discharge port. The inlet is arranged on the side surface of the valve head. Rotating the valve stem can make the inlet communicate with the feed port or make the valve head block the feed port. A sealing boss is provided between the positive pressure isolation cavity and the discharge cavity. The top surface of the sealing boss forms a first conical surface that gradually contracts inward from top to bottom. The first conical surface encloses the valve port. The valve head is provided with a second conical surface. When the valve head closes the valve port, the first conical surface and the second conical surface form an inclined surface seal. A through hole is provided at the top of the sterilization cavity. A communication hole is provided between the sterilization cavity and the positive pressure isolation cavity. The rod body penetrates through the through hole and the communication hole. The gas seal is a lip seal ring arranged between the through hole and the rod body and between the communication hole and the rod body. The lip seal ring includes a body and an elastic rubber ring. Annular V-shaped grooves are respectively provided on the upper and lower end surfaces of the body. The elastic rubber ring is clamped in the V-shaped groove, and the elastic rubber ring protrudes from the end surface of the body. The lip seal ring further includes a mounting ring protruding from the outer peripheral side of the body. A valve sleeve sleeved on the outer side of the rod body is provided in the sterilization cavity. The mounting ring is clamped and fixed between the end surface of the valve sleeve and the wall of the sterilization cavity. The side wall of the valve sleeve is provided with a first through hole and a second through hole that penetrate radially. The first through hole is communicated with the vaporized hydrogen peroxide outlet. The second through hole is communicated with the vaporized hydrogen peroxide inlet.

2. The rotary valve for aseptic filling according to claim 1, It is characterized in that the valve body includes a stainless steel outer shell and a ceramic inner core installed in the stainless steel outer shell. The discharge cavity is arranged on the ceramic inner core. The sealing boss is arranged on the inner side surface of the ceramic inner core.

3. The rotary valve for aseptic filling according to claim 1, It is characterized in that a partition is further provided in the valve cavity. The communication hole is arranged on the partition. The partition performs an upper limit on the valve head.

4. The rotary valve for aseptic filling according to claim 1, It is characterized in that The bottom surface of the rod body is provided with a threaded hole, the top surface of the valve head is convexly provided with a screw rod that is threadedly connected to the threaded hole, a pin shaft radially penetrates the rod body and the screw rod, and a sealing ring is clamped between the top surface of the valve head and the bottom surface of the rod body.

5. The rotary valve for aseptic filling according to claim 1, characterized in that the valve head is a plastic valve head.

6. The rotary valve for aseptic filling according to claim 1, characterized in that the rotary valve for aseptic filling further includes a feed pipe independently processed and formed, and the feed pipe is connected to the feed port.

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