Raw material filtering device for injection production

Abstract

The utility model belongs to the technical field of injection production, and particularly relates to a raw material filtering device for injection production, which comprises a filtering tank, a pressurizing mechanism is arranged outside the filtering tank, a liquid outlet, a filtering layer, a liquid inlet and a piston are sequentially arranged inside the filtering tank from bottom to top, and the liquid outlet penetrates through the lower surface of the filtering tank downwards. The outer side of the filtering layer and the outer side of the piston make contact with the inner side of the filtering tank, the liquid inlet is communicated with the pressurizing mechanism along one side of the filtering tank, a hydraulic cylinder is fixed to the upper surface of the filtering tank, and a hydraulic rod of the hydraulic cylinder extends into the filtering tank in the axial direction and is fixedly connected to the middle of the upper surface of the piston. The end, away from the filtering tank, of the alloy connector extends upwards in an inclined mode, and the pressurizing mechanism comprises a pressurizing pump arranged outside the filtering tank. According to the utility model, the liquid raw material can be subjected to filter pressing in the filtering tank, and the wake flow of the liquid raw material can also be subjected to filter pressing, so that the wasted wake flow is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection production, and particularly relates to a raw material filtering device for injection production. Background Art

[0002] Chinese medicinal materials are strictly selected and purified to remove impurities, non-medicinal parts, and mildewed and insect-eaten individuals. The purified Chinese medicinal materials are pulverized (some may need to be soaked and softened), and then the raw materials are extracted through distillation method, water-alcohol method, etc. These raw materials still need to be finely filtered through a microporous membrane filter or an ultrafilter and sterilized before being used in injections.

[0003] In a traditional microporous membrane filter, a filtering material made of refined nitrocellulose added with appropriate amounts of cellulose acetate, acetone, n-butanol, ethanol, etc. is placed inside a metal tank. For the transportation of fluid in the metal tank, a booster pump is required to increase the pressure to provide sufficient transmembrane driving force for the raw materials.

[0004] When the booster pump increases the pressure of the raw materials, it is generally connected to the outside of the filtering tank through a pipeline and needs to continuously transport the raw materials. Once the raw materials are cut off, the part of the raw materials remaining in the filtering tank and the pipeline forms a wake, and it is difficult to obtain the boosting effect, resulting in the tailing materials being easily left in the filtering tank and causing waste of the wake. For this reason, we propose a raw material filtering device for injection production. Content of the Utility Model

[0005] The purpose of the utility model is to provide a raw material filtering device for injection production, which can perform pressure filtration on liquid raw materials in a filtering tank, and the wake of the liquid raw materials can also be pressure filtered to reduce the wasted wake.

[0006] The technical solution adopted by the utility model is specifically as follows:

[0007] A raw material filtering device for injection production, comprising a filtering tank. A pressurizing mechanism is arranged outside the filtering tank. Inside the filtering tank, a liquid outlet, a filtering layer, a liquid inlet and a piston are sequentially arranged from bottom to top. The liquid outlet penetrates downward through the lower surface of the filtering tank. The outer sides of the filtering layer and the piston are respectively in contact with the inner side of the filtering tank. The liquid inlet communicates with the pressurizing mechanism along one side of the filtering tank. A hydraulic cylinder is fixed on the upper surface of the filtering tank. The hydraulic rod of the hydraulic cylinder extends axially into the filtering tank and is fixedly connected to the middle of the upper surface of the piston. When filtering liquid raw materials, the pressurizing mechanism is used to suck the liquid raw materials in the container, send them into the filtering tank along the liquid inlet, the liquid raw materials gradually fill the filtering tank, and then the hydraulic cylinder is started to intermittently push the piston downward, so that the liquid raw materials pass through the filtering layer and are discharged from the liquid outlet, while the impurities are adsorbed by the filtering layer, and the liquid raw materials can be pressure-filtered in the filtering tank. Then the piston rises to leave a feeding space for the liquid raw materials. This is repeated until the liquid raw materials in the container are filtered. Even if the wake of the liquid raw materials breaks away from the pressurizing mechanism and cannot obtain the pressurizing effect, it can still be pressure-filtered by the piston to reduce the wasted wake.

[0008] An alloy joint is fixedly connected to the outer edge of the liquid inlet. The end of the alloy joint away from the filtering tank extends obliquely upward. The alloy joint is used to strengthen the structure of the liquid inlet and reduce the occurrence of cracking of the liquid inlet caused by the pressurizing effect of the liquid raw materials.

[0009] The pressurizing mechanism includes a booster pump arranged outside the filtering tank. The output end of the booster pump is fixedly connected with a feeding pipe. The end of the feeding pipe away from the booster pump is connected to the obliquely upward end of the alloy joint. When the booster pump is started to suck the liquid raw materials in the container, they are pumped to the filtering tank along the feeding pipe, the alloy joint and the liquid inlet, and the liquid raw materials can be squeezed and filtered in the filtering tank.

[0010] An inverted U-shaped section is arranged on the feeding pipe. The inverted U-shaped section is used in cooperation with the obliquely upward alloy joint for drainage, so that the liquid raw materials can fall after passing over the highest point of the inverted U-shaped section, preventing the liquid raw materials from flowing back when they are stationary.

[0011] A one-way valve is assembled at the position of the feeding pipe downstream of the inverted U-shaped section. The liquid raw materials in the one-way valve flow unidirectionally towards the alloy joint. When pressure-filtering is carried out inside the filtering tank, the one-way valve can close the alloy joint to avoid the reverse flow of the liquid raw materials along the alloy joint, so that the liquid raw materials are pressed by the piston towards the filtering layer and the liquid outlet.

[0012] An alloy mesh is fixed at the position of the inner wall of the filtering tank below the filtering layer. The alloy mesh is used to support the filtering layer. While allowing the liquid raw materials to flow through, it can prevent the filtering layer from sagging due to the pressure-filtering effect, facilitating the stable setting of the filtering layer in the filtering tank.

[0013] The technical effects achieved by the present utility model are:

[0014] A raw material filtering device for the production of injection solution of the present utility model, when filtering liquid raw materials, uses a pressurizing mechanism to suck the liquid raw materials in the container and send them into the filtering tank along the liquid inlet. The liquid raw materials gradually fill the filtering tank, and then the hydraulic cylinder is started to intermittently push the piston downward, so that the liquid raw materials pass through the filtering layer and are discharged from the liquid outlet, while the impurities are adsorbed by the filtering layer. The liquid raw materials can be pressure-filtered in the filtering tank, and then the piston rises to leave a feeding space for the liquid raw materials. This process is repeated until the liquid raw materials in the container are filtered. Even if the wake of the liquid raw materials breaks away from the pressurizing mechanism and cannot obtain the pressurizing effect, it can still be pressure-filtered by the piston to reduce the wasted wake. Description of the Drawings

[0015] Figure 1 is the front view of a raw material filtering device for the production of injection solution of the present utility model;

[0016] Figure 2 is the sectional view of a raw material filtering device for the production of injection solution of the present utility model;

[0017] Figure 3 is the front view of the hydraulic cylinder of the present utility model;

[0018] Figure 4 is of the present utility model Figure 2 The enlarged view of part A in

[0019] In the drawings, the list of components represented by each reference numeral is as follows:

[0020] 1. Filtering tank; 2. Liquid outlet; 3. Filtering layer; 4. Liquid inlet; 5. Piston; 6. Hydraulic cylinder; 7. Alloy joint; 8. Booster pump; 9. Feeding pipe; 10. Inverted U-shaped section; 11. Check valve; 12. Alloy mesh. Detailed Embodiment

[0021] In order to make the purpose and advantages of the present utility model clearer, the present utility model will be specifically described below in conjunction with embodiments. It should be understood that the following text only describes one or several specific implementation manners of the present utility model, and does not strictly limit the specific protection scope claimed by the present utility model.

[0022] As Figures 1-4As shown in the figure, a raw material filtering device for injection production includes a filtering tank 1. The filtering tank 1 is supported by a steel frame and suspended above the ground. A pressurizing mechanism is arranged outside the filtering tank 1. Inside the filtering tank 1, a liquid outlet 2, a filtering layer 3, a liquid inlet 4, and a piston 5 are arranged in sequence from bottom to top. The liquid outlet 2 penetrates downward through the lower surface of the filtering tank 1. The outer sides of the filtering layer 3 and the piston 5 are respectively in contact with the inner side of the filtering tank 1. The filtering layer 3 is a filtering material made of refined nitrocellulose added with appropriate amounts of cellulose acetate, acetone, n-butanol, ethanol, etc. The liquid inlet 4 communicates with the pressurizing mechanism along one side of the filtering tank 1. A hydraulic cylinder 6 is fixed on the upper surface of the filtering tank 1;

[0023] Among them, the hydraulic cylinder 6 can be a single-cylinder hydraulic push rod. A hydraulic system is equipped in the production workshop for starting the hydraulic cylinder 6. The hydraulic rod of the hydraulic cylinder 6 extends axially into the filtering tank 1 and is fixedly connected to the middle of the upper surface of the piston 5. The Chinese medicinal materials are strictly selected to remove impurities, non-medicinal parts, and mildewed and insect-eaten individuals. The selected Chinese medicinal materials are pulverized (some may need to be soaked and softened), and then the raw materials are extracted through distillation, water-alcohol method, etc. The liquid raw materials are contained in utensils. When filtering the liquid raw materials, the pressurizing mechanism is used to suck the liquid raw materials in the utensils and send them into the filtering tank 1 along the liquid inlet 4. The liquid raw materials gradually fill the filtering tank 1, and then the hydraulic cylinder 6 is started to intermittently push the piston 5 downward, so that the liquid raw materials pass through the filtering layer 3 and are discharged from the liquid outlet 2, while the impurities are adsorbed by the filtering layer 3, and the liquid raw materials can be pressure-filtered in the filtering tank 1;

[0024] Then the piston 5 rises to leave a feeding space for the liquid raw materials. This process is repeated until the liquid raw materials in the utensils are filtered. Even if the wake of the liquid raw materials breaks away from the pressurizing mechanism and cannot obtain the pressurizing effect, it can still be pressure-filtered by the piston 5 to reduce the wasted wake. After a certain period, the filtering tank 1 can be opened to replace the filtering layer 3.

[0025] As Figure 1 、 Figure 2 and Figure 3 shown, a number of sealing rubber strips are sleeved on the piston 5 at intervals to improve the airtightness of the piston 5 moving inside the filtering tank 1, and the piston 5 does not contact the liquid inlet 4 and always moves above the liquid inlet 4 to avoid hindering the pressurized pumping of the liquid raw materials.

[0026] As Figure 1 and Figure 2 shown, an alloy joint 7 is fixedly connected to the outer edge of the liquid inlet 4. One end of the alloy joint 7 away from the filtering tank 1 extends obliquely upward. The alloy joint 7 is used to strengthen the structure of the liquid inlet 4 and reduce the occurrence of cracking of the liquid inlet 4 caused by the pressurizing effect of the liquid raw materials. And when the tail materials do not obtain the pressurizing effect, the alloy joint 7 can drain the wake obliquely upward to reduce the retained wake.

[0027] As Figure 1 andFigure 2 As shown, the pressurizing mechanism includes a booster pump 8 disposed outside the filter tank 1. The booster pump 8 can be a pipeline pump of the ISG model, which operates smoothly and has low noise. The output end of the booster pump 8 is connected and fixed with a feed pipe 9. One end of the feed pipe 9 away from the booster pump 8 is connected to one end of the alloy joint 7 obliquely upward. Starting the booster pump 8 to suck the liquid raw material in the container, and pumping it to the filter tank 1 along the feed pipe 9, the alloy joint 7 and the liquid inlet 4, it can squeeze and filter the liquid raw material in the filter tank 1.

[0028] As Figure 1 and Figure 2 shown, an inverted U-shaped section 10 is provided on the feed pipe 9. Using the inverted U-shaped section 10 to cooperate with the alloy joint 7 obliquely upward for drainage, so that the liquid raw material can fall after passing over the highest point of the inverted U-shaped section 10, preventing the liquid raw material from flowing back when it is static.

[0029] As Figure 1 and Figure 2 shown, a check valve 11 is assembled at the position of the feed pipe 9 downstream of the inverted U-shaped section 10. The liquid raw material in the check valve 11 flows unidirectionally towards the alloy joint 7. When pressure filtering is carried out inside the filter tank 1, the check valve 11 can close the alloy joint 7 to prevent the liquid raw material from flowing back along the alloy joint 7, so that the liquid raw material is pressed by the piston 5 towards the filter layer 3 and the liquid outlet 2.

[0030] As Figure 2 and Figure 4 shown, an alloy mesh 12 is fixed at the position of the inner wall of the filter tank 1 below the filter layer 3. Using the alloy mesh 12 to support the filter layer 3, while allowing the liquid raw material to flow through, it can prevent the filter layer 3 from sagging due to the pressure filtering effect, and facilitate the stable setting of the filter layer 3 in the filter tank 1.

[0031] The working principle of the present utility model is as follows: When filtering the liquid raw material, use the pressurizing mechanism to suck the liquid raw material in the container and send it into the filter tank 1 along the liquid inlet 4. The liquid raw material gradually fills the filter tank 1, and then start the hydraulic cylinder 6 to intermittently push the piston 5 downward, so that the liquid raw material passes through the filter layer 3 and is discharged from the liquid outlet 2, while the impurities are adsorbed by the filter layer 3, and pressure filtration of the liquid raw material can be carried out in the filter tank 1.

[0032] Then the piston 5 rises to leave a feeding space for the liquid raw material. Repeat this process until the liquid raw material in the container is filtered. Even if the wake of the liquid raw material breaks away from the pressurizing mechanism and cannot obtain the pressurizing effect, it can still be pressure filtered by the piston 5 to reduce the wasted wake.

[0033] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present utility model. The structures, devices, and operation methods not specifically described and explained in the present utility model, unless otherwise specified and limited, are implemented according to the conventional means in the art.

Claims

1. A raw material filtering device for injection production, comprising a filter tank (1), wherein a pressurizing mechanism is provided outside the filter tank (1), characterized in that: The filter tank (1) is provided with a liquid outlet (2), a filter layer (3), a liquid inlet (4) and a piston (5) in sequence from bottom to top. The liquid outlet (2) penetrates downward through the lower surface of the filter tank (1). The outer side of the filter layer (3) and the outer side of the piston (5) respectively contact the inner side of the filter tank (1). The liquid inlet (4) is connected to the boosting mechanism along one side of the filter tank (1). A hydraulic cylinder (6) is fixed on the upper surface of the filter tank (1). The hydraulic rod of the hydraulic cylinder (6) extends axially into the filter tank (1) and is fixedly connected to the middle of the upper surface of the piston (5).

2. The raw material filtering device for injection production according to claim 1, characterized in that: An alloy joint (7) is fixedly connected to the outer edge of the liquid inlet (4), and the alloy joint (7) extends obliquely upwards from one end away from the filter tank (1).

3. The raw material filtering device for injection production according to claim 2, characterized in that: The boosting mechanism comprises a boosting pump (8) arranged outside the filter tank (1); the output end of the boosting pump (8) is connected and fixedly connected to a feed pipe (9); the end of the feed pipe (9) away from the boosting pump (8) is connected to the end of the alloy joint (7) that is inclined upward.

4. The raw material filtering device for injection production according to claim 3, characterized in that: The feed pipe (9) is provided with an inverted U-shaped section (10).

5. The raw material filtering device for injection production according to claim 4, characterized in that: The feed pipe (9) is equipped with a one-way valve (11) at a position downstream of the inverted U-shaped section (10).

6. The raw material filtering device for injection production according to claim 1, characterized in that: An alloy mesh (12) is fixed to the inner wall of the filter tank (1) at a position below the filter layer (3).

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