Leak-proof valve body in a sterile delivery system for a droplet bottle

Abstract

The utility model discloses an anti -leak valve body in drip bottle aseptic delivery system, include: valve body ontology is provided with backflow groove, back gas hole, gas collection groove, liquid inlet hole and a plurality of intercommunication's isolated groove on valve body ontology, is provided with hollow spring post in gas collection groove, has the hydrophobic bacteria -resistant filter membrane that integrative encapsulation has in hollow spring post, and the bacteria -resistant filter membrane is blocked in through -hole, is provided with the mounting groove on the bottom wall of valve body ontology, is provided with one -way diaphragm in mounting groove, one -way diaphragm includes: the positioning ring of integral forming, elastic sealing sheet and elastic connecting silk, and positioning ring is connected with mounting groove, and elastic sealing sheet zero -pressure is attached on the bottom wall of valve body ontology and blocks up the through -hole of hollow spring post, and elastic connecting silk is evenly distributed between positioning ring and elastic sealing sheet. The utility model can improve the connection sealing property between bacteria -resistant filter membrane and valve body ontology, prevent appearing leakage, can also protect bacteria -resistant filter membrane not to be blocked.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical packaging, and in particular to a leak-proof valve body in a drip bottle aseptic delivery system. Background Technology

[0002] In daily life, dropper bottles are needed for precise medication administration, the most common being eye dropper bottles. Currently, commercially available dropper bottles have issues such as medication contamination by air flowing back into the bottle after dispensing, and medication residue remaining on the dropper head. To address this problem, a new type of sterile dropper bottle with authorization number CN118415813B has emerged, featuring an air-blocking design for external residual medication handling. After dispensing, under negative pressure, residual medication mixes with air and enters the isolation chamber of the valve body. Upon entering the isolation chamber, the residual medication separates; the residual medication flows into the isolation chamber, while the air flows back into the bottle body through the sterilization filter in the vent, causing the bottle to expand and recover. This prevents residual medication from clogging the sterilization filter and affecting the backflow effect. However, in actual use, it was found that after the medicine came into contact with the sterilizing filter membrane, the medicine would remain on the membrane. The medicine residue on the membrane pores would crystallize and block the pores, increasing the filtration resistance of the sterilizing filter membrane, affecting air return, and preventing the bottle from returning to its original shape in time. Moreover, the biological components in the medicine (such as hyaluronic acid) would form a hydrophilic contamination layer on the surface of the sterilizing filter membrane, covering the original mesh structure of the sterilizing filter membrane, thereby destroying the air passage efficiency of the sterilizing filter membrane. When the medicine was being dispensed, the sterilizing filter membrane could not perform well in terms of air permeability, and the bottle could not return to its original shape, resulting in functional failure when used again. During the sealing test of the dropping bottle, the following problems were also found: After adding tracer solution mixed with dye to the dropping bottle, tightening the cap, and inverting the dropping bottle in a container equipped with a vacuum device, a vacuum of 60 kPa was created and maintained for a period of time, and tracer solution leakage was observed; after adding pure water to the dropping bottle, tightening the cap, and placing the dropping bottle in a container containing tracer solution, and pressurizing the container to 35 kPa, after maintaining this pressure for a period of time, tracer solution was found to seep into the container. Inside the dropper bottle, the antibacterial membrane in the hydrophobic sterilization filter cartridge can withstand water pressure above 150 kPa. Therefore, in the two experiments mentioned above, it was impossible for the antibacterial membrane to permeate. Analysis revealed that since the sterilization filter cartridge is sealed on the bottom wall of the valve body, when a large pressure difference occurs between the inside and outside of the dropper bottle, the sterilization filter cartridge will radially contract, creating a gap between it and the valve body. This leads to leakage of the tracer solution through the gap, which poses a high risk to the airtightness of the aseptic delivery system in the dropper bottle. Utility Model Content

[0003] The purpose of this invention is to provide a leak-proof valve body for a sterile delivery system of a dropper bottle that can prevent the antibacterial filter membrane from being blocked and prevent leakage during sealing tests.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a leak-proof valve body in a drip bottle aseptic delivery system, comprising: a valve body body, with an inner mounting groove and an outer mounting groove concentrically arranged on the top wall of the valve body body, capable of engaging with a diaphragm valve and a drip nozzle respectively; a side mounting groove capable of engaging with a dispenser is arranged on the outer side wall of the valve body body; a return groove, a vent hole, a gas collecting groove, a liquid inlet hole, and several interconnected isolation grooves are provided on the valve body body; a hollow spring column capable of installing a spring is arranged in the gas collecting groove; and a hollow spring column is arranged in the hollow spring column. The column is integrally encapsulated with a hydrophobic antibacterial filter membrane, which is blocked in the through hole. An installation groove connected to the hollow spring column is provided on the bottom wall of the valve body. A one-way diaphragm is clamped in the installation groove. The one-way diaphragm includes: an integrally formed positioning ring, an elastic sealing plate and an elastic connecting wire. The elastic sealing plate is coaxially arranged with the positioning ring. The positioning ring is clamped to the installation groove. The elastic sealing plate is in zero-pressure contact with the bottom wall of the valve body and blocks the through hole of the hollow spring column. The elastic connecting wire is evenly distributed circumferentially between the positioning ring and the elastic sealing plate.

[0005] Furthermore, in the aforementioned aseptic delivery system for drip bottles, the leak-proof valve body contains an elastic connecting wire that is arc-shaped. The two ends of the elastic connecting wire are respectively located on the inner wall of the positioning ring and the outer wall of the elastic sealing plate, and the center of the elastic connecting wire is concentric with the center of the elastic sealing plate.

[0006] Furthermore, in the aforementioned aseptic delivery system for drip bottles, the leak-proof valve body has an annular groove on the bottom wall of the valve body and a positioning ring on the top wall of the elastic sealing plate. When the elastic sealing plate is in contact with the valve body at zero pressure, the positioning ring is engaged in the annular groove.

[0007] Furthermore, in the aforementioned aseptic delivery system for drip bottles, the leak-proof valve body has a bottom wall of an elastic sealing plate that is a protruding arched pressure wall. The arched pressure wall is coaxial with the elastic sealing plate, and the maximum diameter of the arched pressure wall is greater than the diameter of the through hole. A horn-shaped buffer groove is recessed at the center of the top wall of the elastic sealing plate, and the maximum diameter of the horn-shaped buffer groove is smaller than the diameter of the through hole.

[0008] Furthermore, in the aforementioned aseptic delivery system for dropper bottles, a leak-proof valve body has a weight-reduction process groove at the apex of the arched pressure wall.

[0009] Furthermore, in the aforementioned aseptic delivery system for drip bottles, a leak-proof valve body has a stop ring protruding from the inner wall of the mounting groove. When the positioning ring is engaged in the mounting groove, the outer wall of the positioning ring abuts against the inner wall of the mounting groove, the top wall of the positioning ring abuts against the bottom wall of the valve body, and the bottom wall of the positioning ring abuts against the stop ring.

[0010] Furthermore, in the aforementioned aseptic delivery system for drip bottles, the leak-proof valve body has five rows of annular isolation grooves spaced vertically on the outer wall of the valve body. A baffle plate is installed between two adjacent isolation grooves. A baffle rib connected to the baffle plate is installed on the outer wall of the valve body, blocking the beginning and end of the isolation grooves. A reflux groove and a vent hole are both installed on the baffle rib. The beginning of the first row of isolation grooves is connected to the reflux groove. A venting groove connected to the second row of isolation grooves is installed on the baffle plate at the end of the first row of isolation grooves. A venting groove connected to the third row of isolation grooves is installed on the baffle plate at the beginning of the second row of isolation grooves. A venting groove connected to the fourth row of isolation grooves is installed on the baffle plate at the end of the third row of isolation grooves. A venting groove connected to the fifth row of isolation grooves is installed on the baffle plate at the beginning of the fourth row of isolation grooves. The end of the fifth row of isolation grooves is connected to the vent hole.

[0011] Furthermore, in the aforementioned aseptic delivery system for dropper bottles, the leak-proof valve body has three supporting ribs circumferentially distributed in each row of isolation slots, and an air passage groove connected to the isolation slots in the same row is provided on the side wall of the supporting ribs.

[0012] Furthermore, in the aforementioned aseptic delivery system for drip bottles, the leak-proof valve body has the same vertical width for the first to fourth rows of isolation slots, while the vertical width of the fifth row of isolation slots is greater than that of the other four rows of isolation slots.

[0013] The advantages of this invention are as follows: The antibacterial filter membrane is integrally encapsulated with the valve body, and the antibacterial filter membrane is contained within the through-hole of the hollow spring column. Therefore, there is no assembly gap between the antibacterial filter membrane and the valve body. During sealing tests, it avoids leakage due to assembly gaps, unlike the gas-barrier sterile drip bottle with external residual liquid treatment (CN118415813B), thus improving sealing performance. Furthermore, after installing a one-way diaphragm on the valve body, the one-way diaphragm can seal the through-hole, protecting the antibacterial filter membrane located within the through-hole from contact with the liquid in the drip bottle. This prevents blockage of the membrane pores in the antibacterial filter membrane. The hydrophobicity of the membrane is not compromised, maintaining its complete hydrophobicity and breathability. Furthermore, the elastic sealing plate in the one-way diaphragm is in zero-pressure contact with the valve body. The pressure generated during gas recirculation can push open the elastic sealing plate in the one-way diaphragm, allowing the gas to flow back into the bottle without affecting the gas recirculation efficiency. Five rows of interconnected isolation grooves are arranged at intervals from top to bottom on the valve body, enabling the mixed gas containing residual medicine and air to flow in a spiral manner. This accelerates the flow rate and centrifugal force of the mixed gas, improves the separation effect between air and residual medicine, and allows the separated residual medicine to form a thin and large liquid film in the isolation groove under high-speed flow, thereby improving the evaporation efficiency. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the anti-leakage valve body in the aseptic delivery system for drip bottles described in this utility model.

[0015] Figure 2 yes Figure 1 A cross-sectional structural diagram.

[0016] Figure 3 yes Figure 2 A magnified schematic diagram of the structure in the A direction.

[0017] Figure 4 yes Figure 2 A schematic diagram of the structure of a unidirectional diaphragm.

[0018] Figure 5 yes Figure 2 A schematic diagram of the structure of the unidirectional diaphragm in the other direction.

[0019] Figure 6 This is a schematic diagram of the structure of a drip bottle using the anti-leakage valve body in the aseptic delivery system for drip bottles described in this utility model. Detailed Implementation

[0020] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0021] like Figures 1-6As shown, the leak-proof valve body in the aseptic delivery system for drip bottles of this utility model includes: a valve body 1, with an inner mounting groove 11 and an outer mounting groove 12 concentrically arranged on the top wall of the valve body 1, which can respectively engage with the diaphragm valve 4 and the drip nozzle 5; and a side mounting groove 13 arranged on the outer side wall of the valve body 1, which can engage with the dispenser 6. The connection structure between the diaphragm valve, the drip nozzle, the dispenser, and the valve body 1 can refer to the gas-blocking aseptic drip bottle with external residual liquid treatment as described in the authorized announcement number: CN118415813B. The valve body 1 is provided with a reflux groove 14, a vent hole 15, a gas collecting groove 16, a liquid inlet hole 17, and several interconnected isolation grooves 18. A hollow spring column 19 capable of installing a spring is provided in the gas collecting groove 16, and a hydrophobic antibacterial filter membrane 2 is integrally encapsulated in the hollow spring column 19, which blocks the through hole 191. During injection molding, the antibacterial filter membrane 2 is pre-installed in the injection mold of the valve body 1. During the injection process, the molten plastic wraps around the edge of the antibacterial filter membrane 2, forming an integrated sealing structure between the antibacterial filter membrane 2 and the valve body 1. The leak-proof valve body described in this application is assembled with the diaphragm valve 4, the nozzle 5, the dispenser 6, and the spring 7 to form a drip head with a sterile delivery system. After the drip head is installed on the bottle body 8, a drip bottle is formed. When the drip bottle is sealed, the tracer liquid can only flow to the external environment through the through hole 191 in the hollow spring column 19. However, since the antibacterial filter membrane 2 blocks the through hole 191, and there is no assembly gap between the antibacterial filter membrane 2 and the valve body 1, there is no assembly gap for the tracer liquid to leak out. Therefore, the tracer liquid cannot leak out through the hydrophobic antibacterial filter membrane 2, thus improving the sealing performance.

[0022] A mounting groove 192 communicating with a hollow spring column 19 is provided on the bottom wall of the valve body 1. A stop ring 193 protrudes from the inner side wall of the mounting groove 192. A one-way diaphragm 3 is engaged in the mounting groove 192. The one-way diaphragm 3 includes: an integrally formed positioning ring 31, an elastic sealing piece 32, and an elastic connecting wire 33. The positioning ring 31 is engaged with the mounting groove 192. The positioning ring 31 provides rigid support for the one-way diaphragm 3 when engaged in the mounting groove 192. When the positioning ring 31 is engaged in the mounting groove 192, the outer side wall of the positioning ring 31 abuts against... On the inner wall of the mounting groove 192, the top wall of the positioning ring 31 abuts against the bottom wall of the valve body 1, and the bottom wall of the positioning ring 31 abuts against the stop ring 193, thus limiting the positioning ring 31. The elastic sealing piece 32 is coaxially arranged with the positioning ring 31, and the elastic sealing piece 32 is in zero-pressure contact with the bottom wall of the valve body 1, sealing the through hole 191 of the hollow spring column 19, and is used to control the opening and closing of the through hole 191. The elastic sealing piece 32 and the valve body 1 can approach each other under the combined action of the micro-adhesion of van der Waals force and the elastic support of the elastic connecting wire 33. To achieve zero-pressure bonding, an annular groove 194 is provided on the bottom wall of the valve body 1, and a positioning ring 321 is provided on the top wall of the elastic sealing plate 32. When the elastic sealing plate 32 is bonded to the valve body 1 under zero pressure, the positioning ring 321 engages with the annular groove 194, improving the bonding stability and sealing performance between the elastic sealing plate 32 and the valve body 1. The bottom wall of the elastic sealing plate 32 is a protruding arched pressure-bearing wall 322, which is coaxial with the elastic sealing plate 32. The maximum diameter of the arched pressure-bearing wall 322 is larger than that of the through hole 1. The diameter of 91 is provided with a weight reduction process groove 323 at the apex of the arched pressure wall 322 to prevent the one-way diaphragm 3 from protruding excessively and unsightly after being installed in the mounting groove 192 of the valve body 1. A horn-shaped buffer groove 324 is recessed at the center of the top wall of the elastic sealing plate 32. The maximum diameter of the horn-shaped buffer groove 324 is smaller than the diameter of the through hole 191. When the elastic sealing plate 32 is pushed open and deformed by the airflow, the horn-shaped buffer groove 324 provides deformation space for the elastic sealing plate 32 by recessing or expanding, thereby reducing the deformation fatigue of the elastic sealing plate 32. The elastic connecting wires 33 are evenly distributed around the circumference between the positioning ring 31 and the elastic sealing plate 32. When the airflow passes through the through hole 191 and blows onto the elastic sealing plate 32, the elastic connecting wires 33 control the elastic sealing plate 32 to open in an directional manner through elastic deformation. When no airflow passes through the through hole 191 and blows onto the elastic sealing plate 32, the elastic connecting wires 33 control the elastic sealing plate 32 to close in an directional manner through elastic deformation, so that the elastic sealing plate 32 and the valve body 1 are re-fitted.

[0023] The elastic connecting wire 33 is arc-shaped, with its two ends respectively located on the inner wall of the positioning ring 31 and the outer wall of the elastic sealing plate 32. The center of the elastic connecting wire 33 is concentric with the center of the elastic sealing plate 32. The concentricity of the elastic connecting wire 33 with the elastic sealing plate 32 ensures that each segment of the elastic connecting wire 33 has the same curvature, and the elastic restoring force is evenly distributed. This makes the valve opening pressure of the elastic sealing plate 32 more stable and prevents jamming. Moreover, when the valve is closed, the concentric arc-shaped elastic connecting wire 33 can evenly pull the elastic sealing plate 32, allowing the elastic sealing plate 32 to automatically center and avoid reset offset that could lead to poor sealing. Since the circumferentially distributed elastic connecting wires 33 are all arc-shaped, there are arc-shaped gaps evenly distributed circumferentially between the elastic sealing plate 32 and the positioning ring 31. When the airflow in the through hole 191 pushes open the elastic sealing plate 32 and flows, the airflow will flow along the circumference under the guidance of the arc-shaped gaps, reducing gas turbulence and pressure loss, and increasing the airflow velocity.

[0024] The anti-backflow valve body described in this application is assembled with the diaphragm valve 4, the drip nozzle 5, the dispenser 6, and the spring 7 to form a drip head with a sterile delivery system. This drip head is then installed on the bottle body 8 to form a drip bottle. During use, the one-way membrane 3 seals the through-hole 191, preventing the liquid medicine in the bottle body 8 from contacting the antibacterial filter membrane 2 in the through-hole 191, thus keeping the antibacterial filter membrane 2 dry. During dripping, the pressure of the liquid medicine is applied to the elastic sealing plate 32. Without the arched pressure-bearing wall 322, the force on the elastic sealing plate 32 is uneven, easily resulting in high pressure on one side and low pressure on the other. Under low pressure, the elastic sealing plate 32 is prone to warping, causing the medicine to come into contact with the antibacterial filter membrane 2 in the through hole 191. When an arched pressure-bearing wall 322 is provided on the elastic sealing plate 32, the arched pressure-bearing wall 322 will evenly distribute the pressure to the entire elastic sealing plate 32, so that the elastic sealing plate 32 is evenly pressurized. Since the maximum diameter of the arched pressure-bearing wall 322 is larger than the aperture of the through hole 191, the force of the arched pressure-bearing wall 322 in evenly distributing the pressure can act on the elastic sealing plate 32 that is attached to the valve body 1 on the outside of the through hole 191, ensuring the sealing performance of the elastic sealing plate 32 in the through hole 191. When the dispensing is complete, the returning air separates from the residual medication and is sprayed onto the elastic sealing plate 32 through the through-hole 191. Since the elastic sealing plate 32 is in zero-pressure contact with the valve body 1, it opens upon being sprayed with returning air, allowing it to enter the bottle 8. Because the elastic sealing plate 32 in the one-way membrane 3 blocks the through-hole 191, the antibacterial filter membrane 2 in the through-hole 191 will not come into contact with the medication and become blocked, thus not affecting the gas reflux efficiency. When the inverted drip bottle is used for reflux, the refluxed gas is evenly discharged from around the elastic sealing plate 32. This not only pushes away the liquid around the elastic sealing plate 32, but also forms annular bubbles around the elastic sealing plate 32. When there is no more airflow in the through hole 191 to push the elastic sealing plate 32, the elastic sealing plate 32 re-adheres onto the valve body 1 to seal the through hole 191. The annular bubbles will only rupture after the elastic sealing plate 32 is adhered to the valve body 1. This prevents the liquid from entering the through hole 191 from the opened elastic sealing plate 32 and coming into contact with the antibacterial filter membrane 2 in the through hole 191.

[0025] In this embodiment, the antibacterial filter membrane 2 is a PTFE filter membrane (TE type) manufactured by Topvan, an independently operated company under the Danaher Group. The filtration accuracy of the antibacterial filter membrane 2 in this embodiment is 0.2 μm, and the bubble point of this type of antibacterial filter membrane 2 is 1.29 psi. This means that the airflow pressure needs to be greater than 1.29 psi to pass through the antibacterial filter membrane 2 and return to the bottle 8. For information on the characteristics of the antibacterial filter membrane 2, please refer to Topvan's "Whatman" documentation. TM Laboratory Filtration and Separation Product Guide.

[0026] In this embodiment, the unidirectional diaphragm 3 is injection molded from TPE material. The diameter of the elastic sealing piece 32 in the unidirectional diaphragm 3 is 2-3 mm, preferably 2.5 mm. The upper and lower thicknesses and the left and right widths of the arc segment of the elastic connecting wire 33 are the same, both being 0.18-0.22 mm, preferably 0.2 mm. The arc length of the elastic connecting wire 33 is 1.2-1.25 mm, preferably 1.24 mm, and the central angle is 45°.

[0027] Static stress analysis of the unidirectional diaphragm 3 using finite element analysis software yielded the following results: Under a pressure of 1 psi, the displacement gap generated by the elastic sealing plate 32 in the unidirectional diaphragm 3 is 0.003566 mm, or 3.566 μm. This means that under a pressure of 1 psi, the elastic connecting wire 33 in the unidirectional diaphragm 3 can undergo elastic deformation. Since the return air in the through-hole 191 can pass through the 0.2 μm filtration membrane 2, the air returning from the through-hole 191 can push open the elastic sealing plate 32 and escape through the gap between the opened elastic sealing plate 32 and the valve body 1. The air flows back into the bottle 8 because the bubble point of the antibacterial filter membrane 2 is 1.29 psi. The pressure of the reflux air in the through hole 191 when passing through the antibacterial filter membrane 2 is greater than 1.29 psi. Therefore, after passing through the antibacterial filter membrane 2, the reflux air can push the elastic sealing plate 32 to cause the elastic connecting wire 33 to deform elastically, thereby opening the elastic sealing plate 32. The diameter of the membrane pores of the antibacterial filter membrane 2 is 0.2 μm, which is much smaller than the displacement gap of the elastic sealing plate 32 (3.566 μm). Therefore, the air can pass through the antibacterial filter membrane 2 and then flow back into the bottle 8 through the gap between the elastic sealing plate 32 and the valve body 1. When selecting antibacterial filter membrane 2 with other filtration precision, static stress analysis of unidirectional membrane 3 is performed on the antibacterial filter membrane 2 based on the bubble point using finite element analysis software. This yields the pressure required for the elastic sealing sheet 32 ​​and elastic connecting wire 33 in unidirectional membrane 3 to undergo elastic deformation at the corresponding bubble point of the antibacterial filter membrane 2. Then, the parameters of the elastic sealing sheet 32 ​​and elastic connecting wire 33 in unidirectional membrane 3 are corrected based on this pressure. After the correction is completed, a unidirectional membrane 3 that is compatible with the antibacterial filter membrane 2 with this filtration precision can be produced.

[0028] In this embodiment, five rows of annular isolation grooves 18 are arranged vertically at intervals on the outer wall of the valve body 1. The vertical width of the first to fourth rows of isolation grooves 18 is the same, while the vertical width of the fifth row of isolation grooves 18 is greater than that of the other four rows. Three supporting ribs 181 are circumferentially distributed in each row of isolation grooves 18. Air passage grooves 1811, connected to the isolation grooves 18 in the same row, are provided on the sidewalls of the supporting ribs 181. The supporting ribs 181 increase the strength of the isolation grooves 18, while the air passage grooves 1811 on the supporting ribs 181 ensure that the isolation grooves 18 are not blocked by the supporting ribs 181, ensuring that each row of isolation grooves 18 is continuous. A baffle plate 182 is provided between two adjacent isolation grooves 18. A baffle rib 183, connected to the baffle plate 182, is provided on the outer wall of the valve body 1. A baffle 183 is positioned between the beginning and end of the isolation trough 18. A return trough 14 and a return air hole 15 are both located on the baffle 183. The beginning of the first row of isolation troughs 18 is connected to the return trough 14. A ventilation trough 1821 connected to the second row of isolation troughs 18 is provided on the baffle plate 182 at the end of the isolation trough 18. A ventilation trough 1821 connected to the third row of isolation troughs 18 is provided on the baffle plate 182 at the beginning of the second row of isolation troughs 18. A ventilation trough 1821 connected to the fourth row of isolation troughs 18 is provided on the baffle plate 182 at the end of the third row of isolation troughs 18. A ventilation trough 1821 connected to the fifth row of isolation troughs 18 is provided on the baffle plate 182 at the beginning of the fourth row of isolation troughs 18. The end of the fifth row of isolation troughs 18 is connected to the return air hole 15.

[0029] After the residual medication mixed with air flows from between the dropper 5 and the dispenser 6 into the return tank 14 (for the return of the mixed gas, refer to the gas-blocking sterile drip bottle with external residual liquid treatment authorized announcement number: CN118415813B), it then enters the first row of isolation tanks 18 from the first end to the last end of the first row of isolation tanks 18, and enters the second row of isolation tanks 18 from the last end of the first row of isolation tanks 18 through the vent 1821, flowing from the last end of the second row of isolation tanks 18 to the first end, and then enters the third row of isolation tanks 18 from the first end to the last end, and finally enters the fourth row of isolation tanks 18 from the last end of the fourth row of isolation tanks 18, flowing from the last end of the fourth row of isolation tanks 18 to the first end, and then... The gas mixture enters the fifth isolation trough 18 from the vent 1821 at the beginning of the fourth isolation trough 18, flows from the beginning to the end of the fifth isolation trough 18, and then flows into the return vent 15. The mixed gas flows in a spiral manner in the fifth isolation trough 18, which increases the flow rate of the mixed gas. When the mixed gas flows at high speed, the residual liquid in the mixed gas will form a thin and large liquid film in the isolation trough 18, which accelerates the evaporation rate of the residual liquid. The vertical width of the fifth isolation trough 18 is set to be larger than that of the other four isolation troughs 18, while the vertical width of the other four isolation troughs 18 is the same. This is to increase the vertical width of the fifth isolation trough 18 to compress the vertical width of the other four isolation troughs 18, reduce the flow cross-sectional area of ​​the other four isolation troughs 18, and cause the mixed gas to produce a narrow tube effect when flowing in the other four isolation troughs 18, further increasing the flow rate.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. A leak-proof valve body in a sterile delivery system for drip bottles, comprising: The valve body has an inner mounting groove and an outer mounting groove concentrically arranged on its top wall, which can respectively engage with a diaphragm valve and a drip nozzle. A side mounting groove is provided on the outer side wall of the valve body, which can engage with a distributor. The valve body also has a return groove, a return air hole, a gas collecting groove, a liquid inlet hole, and several interconnected isolation grooves. A hollow spring column for installing a spring is provided in the gas collecting groove. The key feature is that a hydrophobic antibacterial filter membrane is integrally encapsulated within the hollow spring column. A bacterial filter membrane is blocked in the through hole. An installation groove connected to the hollow spring column is provided on the bottom wall of the valve body. A one-way diaphragm is clamped in the installation groove. The one-way diaphragm includes: an integrally formed positioning ring, an elastic sealing plate and an elastic connecting wire. The elastic sealing plate is coaxially arranged with the positioning ring. The positioning ring is clamped to the installation groove. The elastic sealing plate is in zero-pressure contact with the bottom wall of the valve body and blocks the through hole of the hollow spring column. The elastic connecting wire is evenly distributed circumferentially between the positioning ring and the elastic sealing plate.

2. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 1, characterized in that: The elastic connecting wire is arc-shaped, with its two ends respectively located on the inner wall of the positioning ring and the outer wall of the elastic sealing plate. The center of the elastic connecting wire is concentric with the center of the elastic sealing plate.

3. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 1, characterized in that: An annular groove is provided on the bottom wall of the valve body, and a positioning ring is provided on the top wall of the elastic sealing plate. When the elastic sealing plate is in contact with the valve body at zero pressure, the positioning ring is engaged in the annular groove.

4. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 1, characterized in that: The bottom wall of the elastic sealing plate is a protruding arched pressure wall, which is coaxial with the elastic sealing plate. The maximum diameter of the arched pressure wall is greater than the diameter of the through hole. A horn-shaped buffer groove is recessed at the center of the top wall of the elastic sealing plate. The maximum diameter of the horn-shaped buffer groove is smaller than the diameter of the through hole.

5. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 1, characterized in that: A weight reduction process groove is set at the apex of the arched pressure wall.

6. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 1, characterized in that: A stop ring is protruding from the inner wall of the mounting groove. When the positioning ring is engaged in the mounting groove, the outer wall of the positioning ring abuts against the inner wall of the mounting groove, the top wall of the positioning ring abuts against the bottom wall of the valve body, and the bottom wall of the positioning ring abuts against the stop ring.

7. The leak-proof valve body in the aseptic delivery system for drip bottles according to any one of claims 1 to 6, characterized in that: Five rows of annular isolation grooves are arranged vertically at intervals on the outer wall of the valve body. A baffle plate is arranged between two adjacent isolation grooves. A baffle rib connected to the baffle plate is arranged on the outer wall of the valve body. The baffle rib is located between the beginning and end of the isolation groove. The return groove and the return air hole are both arranged on the baffle rib. The beginning of the first row of isolation grooves is connected to the return groove. A venting groove connected to the second row of isolation grooves is arranged on the baffle plate at the end of the first row of isolation grooves. A venting groove connected to the third row of isolation grooves is arranged on the baffle plate at the beginning of the second row of isolation grooves. A venting groove connected to the fourth row of isolation grooves is arranged on the baffle plate at the end of the third row of isolation grooves. A venting groove connected to the fifth row of isolation grooves is arranged on the baffle plate at the beginning of the fourth row of isolation grooves. The end of the fifth row of isolation grooves is connected to the return air hole.

8. The leak-proof valve body in the aseptic delivery system for drip bottles according to claim 7, characterized in that: Each row of isolation slots has three supporting ribs distributed circumferentially, and an air passage is provided on the side wall of the supporting ribs, which is connected to the isolation slots in the same row.

9. The leak-proof valve body in the aseptic delivery system for dropper bottles according to claim 8, characterized in that: The top and bottom widths of the first to fourth rows of isolation channels are the same, while the top and bottom widths of the fifth row of isolation channels are greater than those of the other four rows.

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