Injection filtering device

Abstract

The utility model relates to an injection filtering device in the technical field of pharmaceutical equipment, which comprises a base and a filter cartridge, the lower end of the filter cartridge is fixed on the base, a filter screen is arranged in the filter cartridge, and a liquid discharge pipe and a slag discharge pipe are arranged on the base; the filter screen is cylindrical, the lower end of the filter screen is arranged on the base, one end of the liquid discharging pipe is communicated with the filter cylinder, one end of the slag discharging pipe is communicated with the filter screen, a matched feeding screw is arranged in the filter screen, the lower end of the feeding screw is connected with a stepping motor, the upper end of the feeding screw is rotationally connected with a cover plate through a bearing, and a feeding port is formed in the cover plate. A fixing ring matched with the cover plate is fixed at the top end of the filter cartridge, and the cover plate is detachably connected with the fixing ring. The filter is reasonable in structure and easy to use, continuous efficient filtering operation can be carried out, meanwhile, the feeding screw is detachable, the filter screen and the feeding screw can be thoroughly cleaned conveniently, and next use is not affected.

Description

Technical Field

[0001] This utility model belongs to the field of pharmaceutical equipment technology, and specifically relates to an injection solution filtration device. Background Technology

[0002] Injectable solutions refer to sterile solutions of drugs intended for injection into the body, as well as sterile powders or concentrated solutions prepared into solutions or suspensions before use. In the production of clear injectable solutions, filtration devices are required to remove impurities. In existing technologies, filter residue often remains inside the filter screen during filtration and cannot be promptly removed; it can only be cleaned after filtration is complete. Accumulated filter residue easily clogs the filter screen pores, affecting the filtration effect and efficiency. Therefore, an injectable solution filtration device is needed to solve the above-mentioned technical problems. Utility Model Content

[0003] To address the aforementioned deficiencies in the existing technology, this utility model provides an injection solution filtration device, comprising a base and a filter cylinder. The lower end of the filter cylinder is fixed to the base, and a filter screen is disposed inside the filter cylinder. The base is provided with a drain pipe and a slag discharge pipe. The filter screen is cylindrical, with its lower end positioned on the base. One end of the drain pipe is connected to the filter cylinder, and one end of the slag discharge pipe is connected to the filter screen.

[0004] The filter screen is equipped with a matching feeding screw. The lower end of the feeding screw is connected to a stepper motor, and the upper end of the feeding screw is rotatably connected to a cover plate via a bearing. The cover plate is provided with a feed inlet. The top of the filter cylinder is fixed with a fixing ring that cooperates with the cover plate. The cover plate and the fixing ring are detachably connected.

[0005] Preferably, the base inside the filter screen is provided with a conical rotating block. The center of the lower surface of the rotating block is fixedly connected to a stepper motor, and the center of the upper surface of the rotating block is provided with a groove. A cross-shaped retaining groove is provided in the groove, and the lower end of the feeding screw matches the groove and is provided with a cross spline that mates with the cross-shaped retaining groove. This arrangement allows the feeding screw and the stepper motor to be detached, facilitating the cleaning of the feeding screw.

[0006] Preferably, a sealing ring is provided on the feeding screw above the cross spline. The sealing ring can be a rubber ring or a silicone ring. The sealing ring can improve the sealing between the feeding screw and the rotating block, preventing liquid or filter residue from entering the groove.

[0007] Preferably, the fixing ring is provided with a pressure cap assembly, which includes a pressure block and a horizontal telescopic rod. The fixed end of the horizontal telescopic rod is fixed to the fixing ring, and the telescopic end of the horizontal telescopic rod faces the cover plate and is fixedly connected to the pressure block. This arrangement makes the cover plate more stable and prevents the cover plate from being lifted when the feeding screw rotates, thus affecting filtration.

[0008] Preferably, a vertical rod is fixedly connected to the bottom of the end of the pressure block away from the cover plate, and a horizontal plate is fixedly connected to the lower end of the vertical rod. A matching groove is provided on the fixing ring corresponding to the horizontal plate, and the horizontal plate is slidably disposed in the groove. A receiving cavity matching the horizontal plate is provided at the end of the groove near the cover plate. This arrangement can limit the position of the cover plate when the pressure block exerts upward pressure on it, preventing the cover plate from rotating when the feeding screw rotates, which would affect filtration.

[0009] Preferably, at least two capping assemblies are provided, and each capping assembly is evenly distributed along the circumference of the fixing ring. This further improves the stability between the cap plate and the fixing ring.

[0010] Preferably, the horizontal telescopic rod is an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

[0011] This invention also includes other components that enable the normal operation of an injection filtration device, such as the control components for a stepper motor and the control components for a horizontal telescopic rod, which are all conventional technologies in the field. Furthermore, devices or components not limited in this invention, such as feeding screws, electric push rods, hydraulic cylinders, pneumatic cylinders, and sealing rings, all employ conventional technologies and equipment in the field.

[0012] Working principle: The injection solution to be filtered continuously enters the filter screen through the inlet. The stepper motor drives the feeding screw to rotate. After being filtered by the filter screen, the injection solution enters the filter cylinder and is discharged from the drain pipe. The filter residue remaining in the filter screen is transported downwards by the feeding screw and finally discharged from the residue discharge pipe, achieving efficient and continuous filtration. After filtration, the cover plate can be opened to remove the feeding screw for thorough cleaning of the filter screen and the feeding screw.

[0013] The beneficial effects of this utility model are: reasonable structure, simple to use, and continuous high-efficiency filtration operation. At the same time, the feeding screw can transport the filtered filter residue downwards and discharge it from the slag discharge pipe, avoiding the accumulation of filter residue and improving the filtration effect and filtration efficiency. The feeding screw is detachable, which facilitates the thorough cleaning of the filter screen and the feeding screw without affecting the next use. Attached Figure Description

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of an injection fluid filtration device according to an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0017] Figure 3 for Figure 1A diagram showing the state of the feed screw as it is removed from the filter cylinder;

[0018] Figure 4 for Figure 3 Enlarged view of point B in the middle;

[0019] Figure 5 for Figure 1 Top view of the rotating block.

[0020] In the diagram: 1. Base; 2. Filter cylinder; 3. Drain pipe; 4. Slag discharge pipe; 5. Filter screen; 6. Feeding screw; 7. Feed inlet; 8. Cover plate; 9. Pressing block; 10. Horizontal telescopic rod; 11. Slide groove; 12. Horizontal plate; 13. Stepper motor; 14. Rotating block; 15. Sealing ring; 16. Fixing ring; 17. Groove; 18. Cross groove; 19. Receiving cavity; 20. Vertical rod. Detailed Implementation

[0021] The present invention will now be clearly described with reference to the accompanying drawings and specific embodiments. This description is merely for explaining the present invention and is not intended to limit it. Any modifications, equivalent substitutions, improvements, etc., made by those skilled in the art based on the embodiments of the present invention without inventive effort to obtain all other embodiments should be included within the protection scope of the present invention.

[0022] Example

[0023] like Figure 1-5 As shown, this utility model provides an injection solution filtration device, including a base 1 and a filter cylinder 2. The lower end of the filter cylinder 2 is fixed to the base 1, and a filter screen 5 is provided inside the filter cylinder 2. The base 1 is provided with a drain pipe 3 and a slag discharge pipe 4. The filter screen 5 is cylindrical, and its lower end is set on the base 1. One end of the drain pipe 3 is connected to the filter cylinder 2, and one end of the slag discharge pipe 4 is connected to the filter screen 5.

[0024] The filter screen 5 is equipped with a matching feeding screw 6. The lower end of the feeding screw 6 is connected to a stepper motor 13. The upper end of the feeding screw 6 is rotatably connected to a cover plate 8 through a bearing. The cover plate 8 is provided with a feed inlet 7. The top end of the filter cylinder 2 is fixed with a fixing ring 16 that cooperates with the cover plate 8. The cover plate 8 and the fixing ring 16 are detachably connected.

[0025] The base 1 inside the filter screen 5 is provided with a conical rotating block 14. The center of the lower surface of the rotating block 14 is fixedly connected to the stepper motor 13. The center of the upper surface of the rotating block 14 is provided with a groove 17. The groove 17 is provided with a cross-shaped slot 18. The lower end of the feeding screw 6 matches the groove 17 and is provided with a cross spline that mates with the cross-shaped slot 18. This arrangement allows the feeding screw 6 to be detached from the stepper motor 13, facilitating the cleaning of the feeding screw 6.

[0026] A sealing ring 15 is provided on the feeding screw 6 above the cross spline. The sealing ring 15 can be a rubber ring or a silicone ring. The sealing ring 15 can improve the sealing between the feeding screw 6 and the rotating block 14, and prevent liquid or filter residue from entering the groove 17.

[0027] The fixing ring 16 is equipped with a pressure cap assembly, which includes a pressure block 9 and a horizontal telescopic rod 10. The fixed end of the horizontal telescopic rod 10 is fixed to the fixing ring 16, and the telescopic end of the horizontal telescopic rod 10 faces the cover plate 8 and is fixedly connected to the pressure block 9. This arrangement makes the cover plate 8 more stable and prevents the cover plate 8 from being lifted when the feeding screw 6 rotates, thus affecting filtration.

[0028] A vertical rod 20 is fixedly connected to the bottom of the end of the pressure block 9 away from the cover plate 8. The lower end of the vertical rod 20 is fixedly connected to a horizontal plate 12. A matching sliding groove 11 is provided on the fixing ring 16 corresponding to the horizontal plate 12. The horizontal plate 12 is slidably disposed in the sliding groove 11. A receiving cavity 19 matching the horizontal plate 12 is provided at the end of the sliding groove 11 near the cover plate 8. This arrangement can limit the position of the cover plate 8 when the pressure block 9 exerts pressure on it, preventing the cover plate 8 from rotating when the feeding screw 6 rotates, which would affect filtration.

[0029] At least two capping assemblies are provided, and each capping assembly is evenly distributed along the circumference of the fixing ring 16. This further improves the stability between the cover plate 8 and the fixing ring 16.

[0030] The horizontal telescopic rod 10 is an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

[0031] During operation, the injection solution to be filtered continuously enters the filter screen through the inlet. A stepper motor drives the feeding screw to rotate. After being filtered by the filter screen, the injection solution enters the filter cylinder and is discharged from the drain pipe. The filter residue remaining in the filter screen is transported downwards by the feeding screw and finally discharged from the residue discharge pipe, achieving efficient and continuous filtration. After filtration, the cover plate can be opened to remove the feeding screw for thorough cleaning of the filter screen and the feeding screw.

[0032] The embodiments of this utility model have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An injection solution filtration device, comprising a base and a filter cylinder, wherein the lower end of the filter cylinder is fixed to the base, a filter screen is provided inside the filter cylinder, and a drain pipe and a sludge discharge pipe are provided on the base; characterized in that: The filter screen is cylindrical, with its lower end mounted on a base. One end of the drain pipe is connected to the filter cylinder, and one end of the slag discharge pipe is connected to the filter screen. The filter screen is equipped with a matching feeding screw. The lower end of the feeding screw is connected to a stepper motor, and the upper end of the feeding screw is rotatably connected to a cover plate via a bearing. The cover plate is provided with a feed inlet. The top of the filter cylinder is fixed with a fixing ring that cooperates with the cover plate. The cover plate and the fixing ring are detachably connected.

2. The injection solution filtration device according to claim 1, characterized in that: The base inside the filter screen is provided with a conical rotating block. The center of the lower surface of the rotating block is fixedly connected to a stepper motor. The center of the upper surface of the rotating block is provided with a groove. A cross slot is provided in the groove. The lower end of the feeding screw matches the groove and is provided with a cross spline that cooperates with the cross slot.

3. The injection solution filtration device according to claim 2, characterized in that: A sealing ring is provided on the feed screw above the cross spline.

4. The injection solution filtration device according to claim 1, characterized in that: The fixing ring is provided with a pressure cap assembly, which includes a pressure block and a horizontal telescopic rod. The fixed end of the horizontal telescopic rod is fixed to the fixing ring, and the telescopic end of the horizontal telescopic rod faces the cover plate and is fixedly connected to the pressure block.

5. The injection solution filtration device according to claim 4, characterized in that: A vertical rod is fixedly connected to the bottom of the end of the pressure block away from the cover plate. A horizontal plate is fixedly connected to the lower end of the vertical rod. A matching groove is provided on the fixing ring corresponding to the horizontal plate. The horizontal plate is slidably disposed in the groove. A receiving cavity matching the horizontal plate is provided at the end of the groove near the cover plate.

6. The injection solution filtration device according to claim 4, characterized in that: At least two capping assemblies are provided, and each capping assembly is evenly distributed along the circumference of the fixing ring.

7. The injection solution filtration device according to claim 4, characterized in that: The horizontal telescopic rod is an electric push rod, a hydraulic cylinder, or a pneumatic cylinder.

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