Pressure-adjustable liquid filling head for pharmacy

Abstract

The utility model discloses a pharmaceutical adjustable pressure type liquid filling head which comprises an air cylinder, the lower end of the air cylinder is connected with a filling mechanism, the filling mechanism is used for filling liquid medicine into a medicine bottle, the filling mechanism comprises a water inlet tank connected with the lower end of an air cylinder piston, and one side of the water inlet tank is connected with a water inlet pipe. Due to the design of the mesh sleeve, dust and impurities can be prevented from flying into the exhaust groove and adhering to the surface of the sealing gasket, so that the dust and the impurities are washed to flow into the medicine bottle when the medicine liquid is injected, and the medicine liquid is deteriorated; the air in the medicine bottle flows into the exhaust groove and is exhausted outwards from the mesh sleeve through the threaded sleeve when the medicine liquid is injected into the medicine bottle through the filling pipe; and when filling of the liquid medicine is stopped, the second spring pushes the baffle to drive the sealing gasket to press the lower end of the filling pipe, so that the situation that the liquid medicine leaks and wastes materials in the process of replacing the medicine bottle, and the production environment and the product package are polluted due to leakage of the liquid medicine can be effectively prevented.

Description

Technical Field

[0001] This utility model relates to the technical field of pharmaceutical liquid filling devices, specifically an adjustable pressure liquid filling head for pharmaceutical applications. Background Technology

[0002] Liquid drug filling is an important method for preparing oral dosage forms and other pharmaceutical preparations. It is flexible, efficient, and adaptable to various production requirements. Using specific equipment and techniques, it accurately injects the liquid drug into vials to meet the needs of drug production and use.

[0003] For example, a liquid filling head disclosed in patent announcement number CN208667072U includes a water inlet device and a cylinder fixed on a filling machine platform. The telescopic rod of the cylinder is connected to a connecting end cap, and the filling head connecting end cap is connected to the water inlet device. The water inlet device has a water inlet end. The feature is that it also includes a positioning overflow device. A filling core is provided axially inside the water inlet device. The lower end of the filling core passes through the bottom of the water inlet device and extends into the positioning overflow device. The lower part of the positioning overflow device is provided with a filling head outlet, the bottom of the filling core is provided with a filling core outlet, and the upper part of the filling core is provided with a filling core inlet. The water inlet device is connected to the positioning overflow device through a spring, and the upper part of the positioning overflow device is provided with an overflow outlet.

[0004] This new liquid filling head improves production efficiency, extends service life, reduces maintenance costs, and enhances the reliability and safety of the filling machine.

[0005] As can be seen from the solutions disclosed in the existing patent documents, when the filling tube injects the liquid medicine into the medicine bottle, it is not convenient for the air inside the medicine bottle to be vented out. The air inside the medicine bottle is easy to mix into the liquid medicine, which causes many small bubbles to be generated in the liquid medicine, resulting in inaccurate filling volume. In addition, when the filling of the liquid medicine is stopped and the medicine bottle is replaced, the liquid medicine is prone to continue to flow downward due to the influence of gravity, resulting in liquid medicine leakage and waste of materials. Moreover, the liquid medicine leakage pollutes the production environment and product packaging. Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of this invention is to provide an adjustable pressure liquid filling head for pharmaceutical use, so as to solve the problems existing in the prior art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an adjustable pressure liquid filling head for pharmaceutical use, comprising a cylinder, a filling mechanism connected to the lower end of the cylinder, the filling mechanism being used to fill liquid medicine into a medicine bottle, the filling mechanism including a water inlet tank connected to the lower end of the cylinder piston, a water inlet pipe connected to one side of the water inlet tank, a sealing ring sleeved inside the water inlet tank, a filling tube slidably inserted inside the sealing ring, a sealing block connected to the upper end of the filling tube, a water inlet provided at the upper end of the filling tube, a spring sleeved on the outer side of the filling tube, a support tube connected to the lower end of the spring, a filling cap connected to the lower end of the support tube, a sealing ring sleeved inside the upper end of the filling cap, and a water inlet groove provided inside the filling tube;

[0008] The filling tube is equipped with an exhaust mechanism inside, which is used to expel internal air when the medicine bottle is filled with liquid medicine. The exhaust mechanism includes a partition inside the filling tube and an exhaust groove inside the filling tube. A threaded sleeve is threaded to one side of the support tube. A mesh sleeve is connected to one end of the threaded sleeve. A nut is connected to one end of the mesh sleeve. A limit ring is connected to the outer side of one end of the threaded sleeve. A fixing tube is pressed against the inner side of the limit ring.

[0009] The lower end of the filling tube is equipped with an anti-drip mechanism to prevent the medicine from dripping and causing pollution and waste of materials when changing medicine bottles. The anti-drip mechanism includes a guide rod connected to the lower end of the partition, a sealing gasket slidably inserted into the outer side of the guide rod, a baffle glued to the lower end face of the sealing gasket, a second spring connected to the lower end face of the baffle, a washer connected to the lower end of the second spring, and a nut tightly attached to the lower end face of the washer.

[0010] Preferably, a filling tube is sleeved inside the water inlet tank, a sealing block is sleeved inside the water inlet tank, a spring is connected to the lower end face of the water inlet tank, and a filling tube is sleeved inside the spring.

[0011] Preferably, the filling tube is internally connected to the support tube, and a sealing ring is adhered to the lower end face of the support tube, with the filling tube slidably inserted into the sealing ring.

[0012] Preferably, an exhaust groove is provided inside one side of the support tube, and a fixing tube is provided on one side of the support tube. The fixing tube is internally threaded to a threaded sleeve, and the exhaust groove communicates with the inside of the threaded sleeve.

[0013] Preferably, the lower end face of the filling tube is pressed with a sealing gasket, the lower end face of the partition is pressed with a sealing gasket, the outer side of the guide rod is slidably sleeved with a baffle, the outer side of the guide rod is slidably sleeved with a spring, the outer side of the guide rod is slidably sleeved with a washer, and the outer side of the guide rod is threadedly connected with a nut.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This pharmaceutical adjustable pressure liquid filling head features a mesh sleeve design that prevents dust and impurities from entering the venting groove and adhering to the sealing gasket surface. This prevents dust and impurities from flowing into the medicine bottle during liquid injection, which could lead to deterioration of the medicine. When the filling tube injects the medicine into the bottle, air inside the bottle flows into the venting groove, passes through the threaded sleeve, and is vented outwards through the mesh sleeve. This prevents air from inside the bottle from mixing into the medicine, which could cause many small air bubbles in the medicine and result in inaccurate filling volume.

[0016] When filling the medicine stops, the second spring pushes the baffle to press the sealing gasket against the lower end of the filling tube, which can effectively prevent the medicine from dripping and wasting materials during the replacement of medicine bottles, and prevent the medicine from dripping and polluting the production environment and product packaging. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a sectional view of the water inlet tank of this utility model;

[0019] Figure 3 This is an enlarged perspective view of the nut of this utility model;

[0020] Figure 4 This is an enlarged sectional perspective view of the lower end of the filling tube of this utility model.

[0021] In the diagram: 1. Cylinder, 11. Water inlet tank, 12. Water inlet pipe, 13. Sealing ring, 14. Filling pipe, 15. Sealing block, 16. Water inlet, 17. Spring 1, 18. Support pipe, 19. Filling cap, 110. Sealing ring, 111. Water inlet groove, 2. Partition plate, 21. Vent groove, 22. Threaded sleeve, 23. Mesh sleeve, 24. Nut, 25. Limiting ring, 26. Fixing pipe, 3. Guide rod, 31. Sealing gasket, 32. Baffle plate, 33. Spring 2, 34. Washer, 35. Nut. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Please see Figure 1-4The figure shows an adjustable pressure liquid filling head for pharmaceutical use, including a cylinder 1. The lower end of the cylinder 1 is connected to a filling mechanism, which is used to fill the medicine bottle with liquid medicine. The filling mechanism includes a water inlet tank 11 connected to the lower end of the piston of the cylinder 1. A water inlet pipe 12 is connected to one side of the water inlet tank 11. One end of the water inlet pipe 12 is connected to a liquid medicine filling device. A sealing ring 13 is sleeved inside the water inlet tank 11. A filling tube 14 is slidably inserted inside the sealing ring 13. A sealing block 15 is connected to the upper end of the filling tube 14. A water inlet 16 is provided at the upper end of the filling tube 14. A spring 17 is sleeved on the outside of the filling tube 14. A support tube 18 is connected to the lower end of the spring 17. A filling cap 19 is connected to the lower end of the support tube 18. A sealing ring 110 is sleeved inside the upper end of the filling cap 19. A water inlet groove 111 is provided inside the filling tube 14.

[0024] The filling tube 14 is equipped with an exhaust mechanism inside. The exhaust mechanism is used to expel internal air when filling the medicine bottle with liquid medicine. The exhaust mechanism includes a partition 2 inside the filling tube 14, an exhaust groove 21 inside the filling tube 14, a threaded sleeve 22 threadedly connected to one side of the support tube 18, a mesh sleeve 23 connected to one end of the threaded sleeve 22, a nut 24 connected to one end of the mesh sleeve 23, a limiting ring 25 connected to the outer side of one end of the threaded sleeve 22, and a fixing tube 26 pressed against the inner side of the limiting ring 25.

[0025] The lower end of the filling tube 14 is equipped with an anti-drip mechanism. The anti-drip mechanism is used to prevent the medicine from dripping and causing pollution and waste of materials when changing medicine bottles. The anti-drip mechanism includes a guide rod 3 connected to the lower end of the partition 2, a sealing gasket 31 slidably inserted into the outer side of the guide rod 3, a baffle 32 glued to the lower end face of the sealing gasket 31, a spring 33 connected to the lower end face of the baffle 32, a gasket 34 connected to the lower end of the spring 33, and a nut 35 tightly attached to the lower end face of the gasket 34.

[0026] Please see Figure 1 , Figure 2 and Figure 4 The water inlet tank 11 is internally fitted with a filling tube 14, and the water inlet tank 11 is internally fitted with a sealing block 15. The lower end face of the water inlet tank 11 is connected to a spring 17, and the spring 17 is internally fitted with a filling tube 14.

[0027] In this configuration, the cylinder 1 is activated to move the water inlet tank 11, support tube 18, and filling tube 14 downwards, causing the filling cap 19 to clamp the medicine bottle. The filling tube 14 is inserted into the medicine bottle, and the filling tube 14 is pressed upwards, causing the sealing block 15 to move upwards. The medicine liquid inside the water inlet tank 11 flows into the filling tube 14 from the water inlet 16 and impacts the sealing gasket 31. The sealing gasket 31 is impacted, pushing the baffle 32 downwards, and the spring 2 33 contracts, allowing the medicine liquid to flow into the medicine bottle to achieve filling.

[0028] Please see Figure 1 and Figure 2The filling tube 14 is connected inside the support tube 18, and a sealing ring 110 is glued to the lower end face of the support tube 18. The filling tube 14 is slidably inserted into the sealing ring 110.

[0029] With this setup, the design of spring 17 can cushion the push of the support tube 18, so that the sealing ring 110 inside the filling cap 19 can cushion the pressure on the mouth of the medicine bottle.

[0030] Please see Figure 1-3 An exhaust groove 21 is provided inside one side of the support tube 18, and a fixing tube 26 is provided on one side of the support tube 18. The fixing tube 26 is internally threaded to a threaded sleeve 22, and the exhaust groove 21 is connected to the inside of the threaded sleeve 22.

[0031] In this configuration, rotating the tightening nut 24 drives the threaded sleeve 22 to connect the support tube 18, and the limiting ring 25 presses the fixing tube 26, facilitating the installation of the mesh sleeve 23. The mesh sleeve 23 is designed to prevent dust and impurities from drifting into the venting groove 21 and adhering to the surface of the sealing gasket 31, so that when the medicine is injected, the dust and impurities are washed into the medicine bottle, causing the medicine to deteriorate. When the filling tube 14 injects the medicine into the medicine bottle, the air inside the medicine bottle flows into the venting groove 21 and passes through the threaded sleeve 22 to vent outward from the mesh sleeve 23, preventing the air inside the medicine bottle from mixing into the medicine, which would cause many small bubbles to be generated in the medicine, resulting in inaccurate filling volume.

[0032] Please see Figure 4 The lower end face of the filling tube 14 is pressed with a sealing gasket 31, the lower end face of the partition 2 is pressed with a sealing gasket 31, the outer side of the guide rod 3 is slidably connected to a baffle 32, the outer side of the guide rod 3 is slidably connected to a spring 33, the outer side of the guide rod 3 is slidably connected to a gasket 34, and the outer side of the guide rod 3 is threadedly connected to a nut 35.

[0033] With this setup, by rotating the nut 35, the shim 34 can be moved longitudinally in conjunction with the spring 33 pushing the shim 34, so that the pressure of the spring 33 can be adjusted as needed. When the filling of medicine is stopped, the spring 33 pushes the baffle 32 to drive the sealing gasket 31 to press the lower end of the filling tube 14, which can effectively prevent the medicine from dripping and wasting materials during the replacement of medicine bottles, and prevent the medicine from dripping and polluting the production environment and product packaging.

[0034] The working principle of this embodiment is as follows: When the pharmaceutical adjustable pressure liquid filling head is in use, the cylinder 1 is activated to drive the water inlet tank 11, support tube 18 and filling tube 14 to move downward, so that the filling cap 19 clamps the medicine bottle, the filling tube 14 is inserted into the medicine bottle, the filling tube 14 is pressed and moves upward, driving the sealing block 15 to move upward, the medicine liquid inside the water inlet tank 11 flows into the filling tube 14 from the water inlet 16 and impacts the sealing gasket 31. The sealing gasket 31 is impacted and pushes the baffle 32 to move downward, the spring 2 33 contracts, and the medicine liquid can flow into the medicine bottle to realize the filling of medicine liquid;

[0035] The design of spring 17 can cushion the push of support tube 18, so that the sealing ring 110 inside filling cap 19 can cushion the compression of the bottle mouth.

[0036] By rotating the tightening nut 24, the threaded sleeve 22 is threaded to connect the support tube 18, and the limiting ring 25 presses the fixing tube 26, which facilitates the installation of the mesh sleeve 23. The design of the mesh sleeve 23 can prevent dust and impurities from drifting into the venting groove 21 and adhering to the surface of the sealing gasket 31, so that when the medicine is injected, the dust and impurities are washed into the medicine bottle, causing the medicine to deteriorate. When the filling tube 14 injects the medicine into the medicine bottle, the air inside the medicine bottle flows into the venting groove 21 and passes through the threaded sleeve 22 to vent outward from the mesh sleeve 23, preventing the air inside the medicine bottle from mixing into the medicine, which would cause many small bubbles to be generated in the medicine, resulting in inaccurate filling volume.

[0037] By rotating the nut 35, the spring 33 pushes the washer 34, which can move the washer 34 longitudinally to adjust the pressure of the spring 33 as needed. When the filling of medicine is stopped, the spring 33 pushes the baffle 32 to press the sealing gasket 31 against the lower end of the filling tube 14. The cylinder 1 drives the water inlet tank 11, the support tube 18 and the filling tube 14 to reset. This can effectively prevent the medicine from dripping and wasting materials during the replacement of medicine bottles, and prevent the medicine from dripping and polluting the production environment and product packaging.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A pharmaceutical use adjustable pressure liquid filling head, characterized by: The utility model provides a medicine bottle filling device, including cylinder (1), the lower end of cylinder (1) is connected with filling mechanism, filling mechanism is used for filling liquid medicine in the inside of medicine bottle, filling mechanism includes the water inlet tank (11) of cylinder (1) piston lower end connection, one side of water inlet tank (11) is connected with water inlet pipe (12), the inside sleeve of water inlet tank (11) is connected with sealing ring (13), the inside sliding insertion of sealing ring (13) is connected with filling pipe (14), the upper end of filling pipe (14) is connected with sealing block (15), the upper end of filling pipe (14) is provided with water inlet (16), the outside sleeve of filling pipe (14) is connected with spring one (17), the lower end of spring one (17) is connected with support pipe (18), the lower end of support pipe (18) is connected with filling cover (19), the inside sleeve of filling cover (19) upper end is connected with sealing ring (110), the inside of filling pipe (14) is provided with water inlet groove (111), The inside of filling pipe (14) is provided with exhaust mechanism, exhaust mechanism is used for discharging internal air when medicine bottle fills liquid medicine, exhaust mechanism includes the baffle (2) of filling pipe (14) inside, the inside of filling pipe (14) is provided with exhaust groove (21), one side of support pipe (18) is connected with threaded sleeve (22) by screwing, one end of threaded sleeve (22) is connected with mesh sleeve (23), one end of mesh sleeve (23) is connected with nut (24), one end of threaded sleeve (22) outside is connected with limit ring (25), the inner side surface of limit ring (25) is pressed with fixed pipe (26); The lower end of filling pipe (14) is equipped with anti-dripping mechanism, anti-dripping mechanism is used for preventing liquid medicine from dripping and causing pollution and wasting material when replacing medicine bottle, anti-dripping mechanism includes guide rod (3) connected with baffle (2) lower end, the outside sliding insertion of guide rod (3) is connected with sealing pad (31), the lower end surface of sealing pad (31) is adhered with baffle (32), the lower end surface of baffle (32) is connected with spring two (33), the lower end of spring two (33) is connected with gasket (34), the lower end surface of gasket (34) is tightly attached with nut (35).

2. The adjustable pressure liquid filling head for pharmaceutical use according to claim 1, characterized in that: The inside of water inlet tank (11) is sleeved with filling pipe (14), the inside of water inlet tank (11) is sleeved with sealing block (15), the lower end surface of water inlet tank (11) is connected with spring one (17), the inside of spring one (17) is sleeved with filling pipe (14).

3. The adjustable pressure liquid filling head for pharmaceutical use according to claim 1, characterized in that: The inside of support pipe (18) is connected with filling pipe (14), the lower end surface of support pipe (18) is adhered with sealing ring (110), the inside sliding insertion of sealing ring (110) is connected with filling pipe (14).

4. The adjustable pressure liquid filling head for pharmaceutical use according to claim 1, characterized in that: One side of support pipe (18) is provided with exhaust groove (21) inside, one side of support pipe (18) is provided with fixed pipe (26), the inside of fixed pipe (26) is connected with threaded sleeve (22) by screwing, exhaust groove (21) communicates inside threaded sleeve (22).

5. The adjustable pressure liquid filling head for pharmaceutical use according to claim 1, characterized in that: The lower end surface of the filling pipe (14) presses the sealing gasket (31), the lower end surface of the partition plate (2) presses the sealing gasket (31), the outer side of the guide rod (3) slides and connects the baffle (32), the outer side of the guide rod (3) slides and connects the spring two (33), the outer side of the guide rod (3) slides and connects the gasket (34), and the outer side of the guide rod (3) is screwed with the nut (35).

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