CN213295776U

CN213295776U - Non-woven fabric coating film scraper mechanism for medical infusion

Info

Publication number: CN213295776U
Application number: CN202021821591.6U
Authority: CN
Inventors: 朱益德; 沈家豪
Original assignee: Suzhou Zhenpu Medical Equipment Co ltd
Current assignee: Suzhou Zhenpu Medical Equipment Co ltd
Priority date: 2020-08-27
Filing date: 2020-08-27
Publication date: 2021-05-28
Anticipated expiration: 2030-08-27

Abstract

The utility model discloses a non-woven fabric coating film scraper mechanism for medical infusion, which relates to the field of composite film preparation, and comprises a hopper, wherein the hopper is internally provided with a baffle plate for dividing the hopper into a front hopper and a rear hopper, the hopper is internally provided with a plurality of transmission shafts, one side of one of the transmission shafts is provided with a power mechanism, one end of the front hopper, which is far away from the rear hopper, is provided with a gravity scraper, the utility model can be suitable for different base fabrics, the utility model adopts a semi-circular arc mechanism to enable the casting film liquid to be infiltrated in one side, the casting film liquid is infiltrated from one side of the base fabric to the other side in the air, the casting film liquid directly enters the non-woven fabric after being completely wetted by the casting film liquid, the casting film liquid is also suitable for the base fabrics which have thicker thickness or have higher viscosity and can not be wetted immediately after the casting film liquid, the upper surface and the lower surface of the non-woven fabric are scraped and coated completely through the self weight of the upper scraper.

Description

Non-woven fabric coating film scraper mechanism for medical infusion

Technical Field

The utility model relates to a complex film preparation field, in particular to medical infusion is with non-woven fabrics coating film scraper mechanism.

Background

1. At present, filtration membranes are structurally divided into support-containing and support-free structures. The support body is used for supporting the filtering membrane and strengthening the filtering membrane. The support-containing membrane generally has surface-recombination, surface coating, wet coating, and the like.

1) Surface compounding method: most typical composite filter membranes are often made by processing two or more types of nonwoven fabrics with deep processing, microporous membranes made by hot stretching. Patent 106079799a discloses a composite film based on a polytetrafluoroethylene stretch film and a base film bonded by polyurethane glue. The composite membrane is convenient to process and simple to manufacture, and is commonly used in the field of air filtering membranes. However, the polytetrafluoroethylene soft membrane or the polyethylene soft membrane is not a filtering membrane formed by phase inversion, the flux of the polytetrafluoroethylene soft membrane or the polyethylene soft membrane is more than ten times smaller than that of a phase inversion membrane, and the polytetrafluoroethylene soft membrane or the polyethylene soft membrane is not suitable for the field of medical infusion.

2) Surface coating method: generally consisting of a support layer and a surface filtration layer. It is characterized in that a layer of film coating is coated on the surface of the supporting layer on the basis of higher porosity and physical properties. A coated filtration membrane was prepared as in patent CN210495957U, characterized in that: having a porous polymeric filtration layer and a polyamide membrane coating at the surface of the porous filtration layer. The filtration of the membrane is very dependent on the aperture filtration of the surface membrane, and the aperture of the supporting layer is too large, so the membrane has no filtration significance. And in order to achieve efficient filtration, the pore diameter of the surface coating is often required to be smaller, and the casting solution seeps into the inner surface to form smaller pores, so that the flux of the filter membrane is directly influenced.

3) A wetting coating method: at present, many enterprises use fiber membranes as supporting layers and coat membrane casting solutions with phase separation reaction, so that the filtering membranes have stronger physical properties and have certain application in the medical field. For example, the electrically neutral transfer membrane of water-treated nylon manufactured by GE corporation is a pure polymer made by impregnating nylon with an inert polyester mesh. It is naturally hydrophilic and optimized for protein binding and highly reproducible binding of nucleic acids. The thickness of the supporting layer is 0.06mm, and the supporting layer is easy to wet and suitable for industrial production. However, the nylon membrane is thin, the thickness of the nylon membrane is basically close to that of the surface layer structure and the inner layer structure of the unsupported membrane, the nylon membrane is not outstanding enough, and the flow rate is low, so that the nylon membrane is not suitable for the field of clinical transfusion.

2. At present, the melt-blown filter material has high porosity, but the filter membrane has larger pore size and thicker thickness, and the material is not saved as other non-woven fabrics if the surface coating is only carried out. If the infiltration coating method is adopted, pores which cannot be discharged are often formed inside the melt-blown fabric when the melt-blown fabric is directly immersed into the membrane casting solution, and the filtration defects are often formed due to the pores in the subsequent phase inversion process.

3. At present, many researches on preparing a phase inversion film by an immersion coating method in a plurality of mechanisms still stay at low viscosity of casting solution and select thinner base materials, which causes great limitation to design and improvement of a formula. The design of the film-making scraper mechanism suitable for different conditions can bring great help to industrial production.

SUMMERY OF THE UTILITY MODEL

The technical problem solved by the utility model is to provide a medical infusion is with non-woven fabrics coating film scraper mechanism that can be suitable for different base cloths.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a medical non-woven fabrics coating film scraper mechanism for infusion, includes the hopper, be provided with the baffle that is used for divideing into preceding hopper and back hopper with the hopper in the hopper, be provided with a plurality of transmission shafts that are used for driving the non-woven fabrics transmission in the hopper, one side of one of them transmission shaft is provided with and is used for driving the driven power unit of transmission shaft, one of them hopper is kept away from one of them and is served and be provided with the gravity scraper that is used for scraping unnecessary feed liquid on the non-woven fabrics, the transmission shaft is used for driving the non-woven fabrics transmission, power unit is used for driving the transmission shaft transmission, the gravity.

Further, the method comprises the following steps: the gravity scraper comprises an upper scraper body, a lower scraper body and a scraper frame, wherein the scraper frame is fixedly arranged on the upper end surface of the front hopper, the lower scraper body is fixedly arranged on the scraper frame, the upper scraper body and the lower scraper body are connected through a top cutter nut, so that the distance between the upper scraper body and the lower scraper body can be adjusted, the gravity scraper can be suitable for non-woven fabrics with different thicknesses, and the gravity scraper is used for leading the non-woven fabrics to enter water from the rear oblique lower part after passing through the scraper, and leading the upper surface and the lower surface of the non-woven fabrics to be completely coated by blade coating through the self weight of.

Further, the method comprises the following steps: and liquid inlets for allowing the casting solution to respectively enter the front hopper and the rear hopper are formed in one sides of the front hopper and the rear hopper, and the liquid inlets are used for allowing the casting solution to respectively enter the front hopper and the rear hopper.

Further, the method comprises the following steps: one side of preceding hopper is provided with the first liquid level indicator who is used for detecting liquid level in the preceding hopper, be provided with the second liquid level indicator who is used for detecting liquid level in the back hopper, liquid level in the hopper before first liquid level indicator is used for detecting, liquid level in the second liquid level indicator is used for detecting the back hopper.

Further, the method comprises the following steps: be provided with the tight regulator in the preceding hopper, the tight regulator is including the first connecting block and the second connecting block of connecting from top to bottom, first connecting block and second connecting block pass through screw nut and connect and make the distance between first connecting block and the second connecting block adjustable, the lower extreme of second connecting block and one of them transmission shaft fixed connection for thereby can adjust the vertical distance between two transmission shafts through adjusting nut and adjust the vertical distance between first connecting block and the second connecting block, the tight regulator can revise unreeling tension balance of non-woven fabrics, prevents to unreel tension and crosses the pine and produce the shake.

Further, the method comprises the following steps: the rear hopper is internally and longitudinally provided with a semicircular arc structure, so that the non-woven fabric is soaked by the membrane casting solution on one side, the membrane casting solution directly enters the membrane casting solution after the non-woven fabric is completely wetted by the membrane casting solution, the structure can enable the membrane casting solution to permeate to the other side from one side of the base cloth in the air after the non-woven fabric on one side is wetted, and the structure is also suitable for the base cloth which is thicker in thickness or cannot be wetted immediately due to higher viscosity of the membrane casting solution.

Further, the method comprises the following steps: and a water bath is arranged below the front hopper and the rear hopper, and is externally connected with a circulating water pump for heating so as to control the temperature of the casting solution in the water bath.

Further, the method comprises the following steps: the anti-overflow trough is arranged at one end, far away from the rear hopper, of the front hopper, the anti-overflow trough is V-shaped and is deeper than the depth of the front hopper, the waste of a small area in a certain time can be avoided due to the design, and meanwhile, the liquid inlet can be closed if a large amount of overflow occurs in a short time, and the overflowing casting solution is used to a certain extent.

Further, the method comprises the following steps: and a front cover plate for protecting the membrane casting liquid in the front hopper is arranged above the front hopper, and a rear cover plate for protecting the membrane casting liquid in the front hopper is arranged above the rear hopper.

The utility model has the advantages that: the utility model can be suitable for different base fabrics, including base fabrics with thicker thickness and poorer permeability, the utility model adopts a half-circular arc mechanism to enable the casting solution to be infiltrated on one side, the casting solution is infiltrated to the other side from one side of the base fabric in the air, the non-woven fabrics are directly entered into the casting solution after the casting solution is completely wetted, the utility model is also suitable for base fabrics with thicker thickness or which cannot be wetted immediately due to larger viscosity of the casting solution, the gravity scraper is used for entering water from the oblique lower side after the non-woven fabrics pass through the scraper, the upper and lower surfaces of the non-woven fabrics are all scraped and coated completely through the self weight of the upper scraper, the anti-overflow trough can avoid the waste of small area in a certain time, and simultaneously, the liquid inlet can be closed when a large amount of overflow occurs in a short time, and the casting solution of overflow is used to a certain degree, the tightness regulator can correct the tension balance of unwinding of, prevent that unwinding tension from loosening excessively and producing the shake.

Drawings

FIG. 1 is a schematic structural view of a non-woven fabric coating film scraper mechanism for medical infusion;

FIG. 2 is a schematic view of a slack adjuster;

labeled as: 1. a drive shaft; 3. a water bath; 4. a semi-circular arc structure; 5. an overflow prevention trough; 6. a gravity scraper; 7. a top cutter nut; 8. a liquid inlet; 9. a baffle plate; 10. a rear cover plate; 11. a slack adjuster; 12. a front hopper; 13. a rear hopper; 21. a first liquid level indicator; 22. a second liquid level indicator.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

As shown in fig. 1 a medical non-woven fabrics coating film scraper mechanism for infusion, including the hopper, be provided with in the hopper and be used for divideing into preceding hopper 12 and back hopper 13 baffle 9, be provided with a plurality of transmission shafts 1 that are used for driving the non-woven fabrics transmission in the hopper, one side of one of them transmission shaft 1 is provided with and is used for driving the driven power unit of transmission shaft 1, preceding hopper 12 is kept away from one of back hopper 13 and is served and be provided with the gravity scraper 6 that is used for scraping unnecessary feed liquid on the non-woven fabrics, transmission shaft 1 is used for driving the non-woven fabrics transmission, power unit is used for driving transmission shaft 1 transmission, gravity scraper 6 is used for scraping unnecessary feed liquid on the non-woven.

On the basis, the gravity scraper 6 includes cutter body, lower cutter body and knife rest, the knife rest is fixed to be set up in the front on the up end of hopper 12, the cutter body is fixed to be set up on the knife rest down, go up the cutter body and connect through top knife nut 7 with lower cutter body for it is adjustable to go up the distance between cutter body and the lower cutter body, makes gravity scraper 6 can be suitable for the non-woven fabrics of different thickness, gravity scraper 6 is used for passing through the scraper to the below income water to the slope after the non-woven fabrics, through the self weight of last scraper, makes the non-woven fabrics upper and lower surface all by the knife coating clean.

On the basis, one side of each of the front hopper 12 and the rear hopper 13 is provided with a liquid inlet 8 for allowing casting solution to enter the front hopper 12 and the rear hopper 13 respectively, and the liquid inlet 8 is used for allowing casting solution to enter the front hopper 12 and the rear hopper 13 respectively.

On the basis, one side of preceding hopper 12 is provided with first liquid level indicator 21 that is used for detecting the interior liquid level of preceding hopper 12, be provided with second liquid level indicator 22 that is used for detecting the interior liquid level of back hopper 13 in the back hopper 13, first liquid level indicator 21 is used for detecting the interior liquid level of preceding hopper 12, second liquid level indicator 22 is used for detecting the interior liquid level of back hopper 13, all there is the green scale region that is used for expressing suitable liquid level on first liquid level indicator 21 and the second liquid level indicator 22.

On the basis, as shown in fig. 2, be provided with elasticity controller 11 in the preceding hopper 12, elasticity controller 11 is including the first connecting block and the second connecting block of connecting from top to bottom, first connecting block and second connecting block pass through screw nut and connect and make the distance between first connecting block and the second connecting block adjustable, the lower extreme and one of them transmission shaft 1 fixed connection of second connecting block for thereby can adjust the vertical distance between two transmission shafts 1 through adjusting nut and adjust the vertical distance between first connecting block and the second connecting block, elasticity controller 11 can revise unreeling tension balance of non-woven fabrics, prevents to unreel tension and excessively loose the production shake.

On the basis, the semi-arc structure 4 is longitudinally arranged in the rear hopper 13, so that the non-woven fabric is soaked by the membrane casting solution on one side, and the membrane casting solution directly enters the membrane casting solution after the non-woven fabric is completely wetted by the membrane casting solution.

On the basis, a water bath 3 is arranged below the front hopper 12 and the rear hopper 13, and the water bath 3 is externally connected with a circulating water pump for heating so as to control the temperature of the casting solution in the water bath 3.

On the basis, one of the ends of the front hopper 12 far away from the rear hopper 13 is provided with an anti-overflow trough 5, the anti-overflow trough 5 is V-shaped and the depth of the anti-overflow trough 5 is deeper than the front hopper 12, the design can avoid waste of a small area in a certain time, and meanwhile, if a large amount of overflow occurs in a short time, the liquid inlet 8 can be closed, and the membrane casting liquid of the overflow is used to a certain extent.

On the basis, a front cover plate for protecting the membrane casting solution in the front hopper 12 is arranged above the front hopper 12, and a rear cover plate 10 for protecting the membrane casting solution in the front hopper 12 is arranged above the rear hopper 13.

On the basis, firstly, the base cloth is penetrated through membranes according to a cloth feeding mode, a circulating water bath is started, a hot water bath is heated to a specified temperature, then the membrane casting solutions are respectively connected into the two solution inlets 8, the membrane casting solutions are placed in a brake opening mode, the liquid level of the membrane casting solutions reaches the corresponding scale green area, then a power mechanism is started to drive a transmission shaft 1 to drive the base cloth to be in transmission, an elastic regulator is preferably adjusted until the base cloth does not have dynamic pause shake, top knife nuts 7 on two sides of a gravity scraper 6 are adjusted until no excess solution exists on the upper surface and the lower surface of the base cloth, the solution pouring speed of the membrane casting solutions in a front hopper 12 is adjusted, the liquid level of the membrane casting solutions is balanced at a certain position, the solution pouring speed of the membrane casting solutions in a rear hopper 13 is adjusted to be balanced, and the.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. The utility model provides a medical infusion is with non-woven fabrics coating film scraper mechanism, includes the hopper, its characterized in that: be provided with baffle (9) that are used for divideing into preceding hopper (12) and back hopper (13) with the hopper in the hopper, be provided with a plurality of transmission shafts (1) that are used for driving the non-woven fabrics transmission in the hopper, one side of one of them transmission shaft (1) is provided with and is used for driving transmission shaft (1) driven power unit, preceding hopper (12) are kept away from one of back hopper (13) and are served and are provided with gravity scraper (6) that are used for scraping unnecessary feed liquid on the non-woven fabrics.

2. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: the gravity scraper (6) comprises an upper scraper body, a lower scraper body and a scraper frame, wherein the scraper frame is fixedly arranged on the upper end face of the front hopper (12), the lower scraper body is fixedly arranged on the scraper frame, and the upper scraper body and the lower scraper body are connected through a top scraper nut (7), so that the distance between the upper scraper body and the lower scraper body can be adjusted.

3. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: and liquid inlets (8) for allowing casting solution to enter the front hopper (12) and the rear hopper (13) are formed in one sides of the front hopper (12) and the rear hopper (13) respectively.

4. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: one side of preceding hopper (12) is provided with first liquid level indicator (21) that is used for detecting the interior liquid level of preceding hopper (12), be provided with second liquid level indicator (22) that is used for detecting the interior liquid level of back hopper (13) in back hopper (13).

5. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: be provided with elasticity adjuster (11) in preceding hopper (12), elasticity adjuster (11) are including the first connecting block and the second connecting block of connecting from top to bottom, first connecting block and second connecting block pass through screw nut and connect and make the distance between first connecting block and the second connecting block adjustable, the lower extreme and one of them transmission shaft (1) fixed connection of second connecting block for thereby can adjust the vertical distance between two transmission shaft (1) through adjusting nut and adjust the vertical distance between first connecting block and the second connecting block.

6. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: and a semi-arc structure (4) is longitudinally arranged in the rear hopper (13), so that the non-woven fabric is soaked by the casting solution on one side.

7. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: a water bath (3) is arranged below the front hopper (12) and the rear hopper (13), and the water bath (3) is externally connected with a circulating water pump for heating so as to control the temperature of the casting solution in the water bath (3).

8. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: the anti-overflow device is characterized in that an anti-overflow trough (5) is arranged at one end, far away from the rear hopper (13), of the front hopper (12), and the anti-overflow trough (5) is V-shaped and is deeper than the front hopper (12).

9. The medical non-woven fabric coating film scraper mechanism for infusion as claimed in claim 1, wherein: a front cover plate used for protecting the membrane casting liquid in the front hopper (12) is arranged above the front hopper (12), and a rear cover plate (10) used for protecting the membrane casting liquid in the front hopper (12) is arranged above the rear hopper (13).