Porous plastic cushion film for Buchner funnel suction filtration solid-liquid separation

Abstract

The utility model discloses a porous plastic cushion film for suction filtration solid-liquid separation of a Buchner funnel, which is of a circular sheet structure and is arranged between suction filtration holes of the Buchner funnel and filter paper, the diameter of the cushion film is 0.83-0.91 times of that of the filter paper, the cushion film is ensured to be tightly attached to the edges of the suction filtration holes of the Buchner funnel, uniform support is provided for the filter paper, and the filter paper is prevented from being damaged. And the filter paper is prevented from being broken due to negative pressure. The cushion film is made of corrosion-resistant and chemically inert materials such as ziplock bag plastic, umbrella cloth and acrylic fibers, the surface of the cushion film is smooth and easy to clean or disposable, and the problems that traditional filter cloth is difficult to clean and pollutes are solved. According to the pad film, liquid circulation is optimized through a porous structure, meanwhile, the fitting degree of the filter paper and the Buchner funnel is enhanced, liquid leakage is prevented, and the experiment success rate and operation convenience are remarkably improved. Compared with the prior art, the technical scheme is simple in structure, low in cost and high in adaptability, provides a stable and efficient solid-liquid separation effect, and solves the problems of filter paper damage and liquid leakage.

Description

Technical Field

[0001] The utility model relates to the technical field of laboratory filtration equipment, in particular to a porous plastic pad film for solid-liquid separation by suction filtration using a Buchner funnel. Background Art

[0002] The solid-liquid separation technology by suction filtration using a Buchner funnel is widely used in laboratory and industrial scenarios. By placing a filter paper in the funnel for suction filtration, solid-liquid separation is achieved. However, in actual operation, since the filter paper directly bears the negative pressure from the suction filtration holes of the funnel, the wet filter paper is prone to breakage due to uneven local stress during suction filtration, resulting in solid particles passing through the filter paper and entering the filter flask, affecting the experimental results and even leading to experimental failure. To solve this problem, the prior art usually adopts two methods:

[0003] 1. A filter cloth is placed under the filter paper to provide support and prevent the filter paper from breaking. However, the filter cloth is usually thick and difficult to fit tightly with the edge of the suction filtration holes of the Buchner funnel, resulting in the possibility that the liquid may directly enter the filter flask by bypassing the filter paper, and the solid-liquid separation effect is not ideal. In addition, the filter cloth is difficult to clean, not easy to completely remove residues, prone to contaminating subsequent experiments, and the cost of the filter cloth is high, not suitable for single-use.

[0004] 2. Stack multiple layers of filter paper to enhance the strength of the filter paper. However, even when multiple layers of filter paper are stacked and used, it is still difficult to completely avoid the risk of filter paper breakage, and it increases the consumption of experimental materials and the operation complexity. The stacking of multiple layers of filter paper will also reduce the filtration efficiency, wasting time and resources.

[0005] Therefore, how to provide uniform support for the filter paper, avoid filter paper breakage and ensure tight fit with the Buchner funnel has become the technical problem to be solved by the present utility model. Summary of the Utility Model

[0006] The technical problem solved by the present utility model is to provide a porous plastic pad film for solid-liquid separation by suction filtration using a Buchner funnel to solve the problems of easy breakage of the filter paper, difficult cleaning of the filter cloth and poor solid-liquid separation effect as mentioned in the above background art.

[0007] To solve the above technical problem, the technical solution adopted by the present utility model is as follows:

[0008] A porous plastic pad film for solid-liquid separation by suction filtration using a Buchner funnel, the porous plastic pad film is in a thin sheet structure and is used to be arranged between the suction filtration holes of the Buchner funnel and the filter paper;

[0009] The diameter of the porous plastic pad film is more than 0.83 times the diameter of the filter paper, and the edge of the porous plastic pad film corresponds to and tightly fits with the edge of the suction filtration holes of the Buchner funnel, so that the porous plastic pad film covers the suction filtration holes of the Buchner funnel but does not completely cover the bottom of the Buchner funnel;

[0010] The porous plastic cushion film includes holes densely distributed on the porous plastic cushion film. The porous plastic cushion film with holes is located between the suction filtration hole of the Buchner funnel and the filter paper to provide uniform support for the filter paper and prevent the filter paper from being punctured due to negative pressure during suction filtration.

[0011] As a further solution of the present utility model, the diameter of the porous plastic cushion film is 0.83 to 0.91 times the diameter of the filter paper.

[0012] As a further solution of the present utility model, the porous plastic cushion film is of a circular thin sheet structure.

[0013] As a further solution of the present utility model, the edge of the porous plastic cushion film corresponding to the edge of the suction filtration hole of the Buchner funnel means that the circular center line of the circular thin sheet and the center line of the filter paper are on the same straight line.

[0014] As a further solution of the present utility model, the Buchner funnel is a cylindrical Buchner funnel with a groove at one end, and the axis line of the cylindrical Buchner funnel with the groove is on the same straight line as the circular center line of the circular thin sheet.

[0015] As a further solution of the present utility model, the holes are evenly distributed on the porous plastic cushion film.

[0016] As a further solution of the present utility model, the porous plastic cushion film is made of a material that is corrosion-resistant and chemically inert. The material includes but is not limited to self-sealing bag plastic, umbrella cloth, acrylic, spandex, nylon or spandex. The surface of the material of the porous plastic cushion film is a smooth structure to reduce the interaction with the liquid, suitable for cleaning or for single use.

[0017] As a further solution of the present utility model, the geometric shape of the holes includes but is not limited to circular and elliptical, and the arrangement form of the holes is regular or irregular arrangement.

[0018] As a further solution of the present utility model, the thickness of the porous plastic cushion film is less than the thickness of the filter paper to ensure that when the porous plastic cushion film is laid on the suction filtration hole of the Buchner funnel, it will not affect the tight fit between the filter paper and the Buchner funnel.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. Effectively prevent the filter paper from being damaged and ensure the success rate of the experiment: By setting a porous plastic cushion film between the filter paper and the suction filtration hole of the Buchner funnel, uniform support is provided for the filter paper, avoiding the problem that the filter paper is punctured due to excessive local force during suction filtration. This structure significantly improves the stability and success rate of the experiment, overcoming the common defect in the prior art that the experiment fails due to the damage of the filter paper.

[0021] 2. Close fitting and optimized design: The size of the porous plastic gasket film is designed to be 0.83 to 0.91 times the diameter of the filter paper. Its edge corresponds to and closely fits the edge of the suction filtration hole of the Buchner funnel, avoiding gaps between the gasket film and the filter paper, thus eliminating the phenomenon that liquid directly enters the filter flask by bypassing the filter paper and ensuring the accuracy of solid-liquid separation.

[0022] 3. Simple structure and easy to implement: As a thin sheet structure, the porous plastic gasket film has evenly distributed holes, and the geometric shapes and arrangement forms of the holes are flexible and diverse. It is not only easy to process and manufacture, but also the hole size and arrangement form can be flexibly adjusted according to experimental needs, thereby optimizing the suction filtration efficiency and the support effect of the filter paper. Compared with the existing multi-layer filter paper stacking and thick filter cloth, this design significantly simplifies the operation process and reduces the experimental cost.

[0023] 4. Enhanced stability and reliability: When performing suction filtration, the porous plastic gasket film is naturally adsorbed on the suction filtration hole of the Buchner funnel by the negative pressure effect, with high stability and not easy to move, further ensuring the close fit between the filter paper and the Buchner funnel. This design completely eliminates the hidden dangers of the filter paper edge warping and liquid leakage, while achieving the experimental cleanliness, improving the safety of operation and the reliability of experimental results.

[0024] 5. High adaptability and wide application: The material and structure design of this porous plastic gasket film has wide adaptability and is suitable for various chemical experimental environments, especially for experimental scenarios with high cleanliness requirements. It solves the problems of existing filter cloth being easy to be contaminated, difficult to clean, and high cost, provides an economical and practical solution, and significantly improves the efficiency and effect of laboratory operations.

[0025] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 It is a schematic structural diagram of the present utility model.

[0028] Figure 2 For Figure 1 the enlarged schematic diagram of part A of

[0029] The reference numerals and names in the drawings are as follows:

[0030] A porous plastic pad film 1, a Buchner funnel 2, a suction filtration hole 3, a filter paper 4, and holes 5. Specific embodiments

[0031] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0032] Please refer to Figure 1 -2. In the embodiment of the present invention, a porous plastic pad film for solid-liquid separation by suction filtration using a Buchner funnel. The porous plastic pad film 1 is a thin sheet structure and is used to be disposed between the suction filtration hole 3 of the Buchner funnel 2 and the filter paper 4. The diameter of the porous plastic pad film 1 is more than 0.73 times the diameter of the filter paper 4. The edge of the porous plastic pad film 1 corresponds to and closely adheres to the edge of the suction filtration hole 3 of the Buchner funnel 2, so that the porous plastic pad film 1 covers the suction filtration hole 3 of the Buchner funnel 2 but does not completely cover the bottom of the Buchner funnel 2. The porous plastic pad film 1 includes holes 5 densely distributed on the porous plastic pad film 1. The porous plastic pad film 1 having holes 5 is located between the suction filtration hole 3 of the Buchner funnel 2 and the filter paper 4 to provide uniform support for the filter paper 4 and prevent the filter paper 4 from being broken by negative pressure during suction filtration. The diameter of the porous plastic pad film 1 is 0.83 to 0.91 times the diameter of the filter paper 4, and the porous plastic pad film 1 is a circular thin sheet structure. The edge of the porous plastic pad film 1 corresponding to the edge of the suction filtration hole 3 of the Buchner funnel 2 means that the circular center line of the circular thin sheet and the center line of the filter paper 4 are on the same straight line. The Buchner funnel 2 is a cylindrical Buchner funnel 2 with a groove at one end, and the axis line of the cylindrical Buchner funnel 2 with a groove is on the same straight line as the circular center line of the circular thin sheet.

[0033] The holes 5 are evenly distributed on the porous plastic pad film 1. The porous plastic pad film 1 is made of corrosion-resistant and chemically inert materials, and the materials include but are not limited to self-sealing bag plastic, umbrella cloth, acrylic, spandex, cotton or spandex. The surface of the material of the porous plastic pad film 1 is a smooth structure to reduce the interaction with the liquid, suitable for cleaning or for single use. The geometric shape of the holes 5 includes but is not limited to circular and elliptical, and the arrangement form of the holes 5 is regular or irregular.

[0034] The thickness of the porous plastic pad film 1 is less than that of the filter paper 4 to ensure that when the porous plastic pad film 1 is laid on the suction filtration hole 3 of the Buchner funnel 2, it will not affect the tight fit between the filter paper 4 and the Buchner funnel 2. Specifically, the thickness of the porous plastic pad film 1 is designed to be thinner than that of the filter paper 4. In this way, when laying, the porous plastic pad film 1 can closely adhere to the surface of the suction filtration hole 3 of the Buchner funnel 2 and will not raise the filter paper 4 due to the excessive thickness of the pad film, thus ensuring that the filter paper 4 can be in close contact with the surface of the Buchner funnel 2 without gaps. This design prevents the liquid from bypassing the filter paper and entering the funnel, ensuring the normal progress of the suction filtration process and the effect of solid-liquid separation.

[0035] Example 1:

[0036] In a chemical laboratory, the Buchner funnel 2 is widely used in various solid-liquid separation experiments, such as separating the solid product after a reaction or purifying a solution, etc. During the experiment, it is necessary to lay the filter paper 4 on the suction filtration hole 3 of the Buchner funnel 2 and perform suction filtration through a vacuum pump to achieve solid-liquid separation. However, due to the direct action of the vacuum negative pressure on the filter paper 4, the filter paper 4 is often punctured and solid particles pass through the filter paper 4 and enter the filter flask. This not only affects the accuracy of the experimental results but also leads to experimental failure, wasting materials and time.

[0037] To solve this problem, the present utility model provides a porous plastic pad film 1, which is designed to be disposed between the suction filtration hole 3 of the Buchner funnel 2 and the filter paper 4 to provide uniform support for the filter paper 4 and prevent it from being damaged due to negative pressure. In specific applications, first select a porous plastic pad film 1 with a suitable diameter, and its diameter is 0.83 to 0.91 times the diameter of the filter paper 4, so that the pad film can just cover the suction filtration hole 3 of the Buchner funnel 2 without completely covering the bottom of the Buchner funnel 2, ensuring that the filter paper 4 can be in close contact with the bottom of the Buchner funnel 2 and avoiding the phenomenon that the liquid bypasses the filter paper 4 and directly enters the filter flask.

[0038] When in use, lay the porous plastic pad film 1 flat above the suction filtration hole 3 of the Buchner funnel 2, and then cover the filter paper 4 on the porous plastic pad film 1. The hole 5 structure of the porous plastic pad film 1 is evenly distributed to ensure that the liquid can pass through the filter paper 4 smoothly and provide a stable supporting effect to prevent the filter paper 4 from being damaged under negative pressure. Since the material of the pad film is selected as a corrosion-resistant and chemically inert material (such as self-sealing bag plastic, umbrella cloth, acrylic fiber, etc.), the surface is smooth and it is not easy to adsorb the components of the experimental liquid, making the porous plastic pad film 1 easy to clean after the experiment or used as a disposable item, avoiding the problem of experimental contamination caused by incomplete cleaning of the traditional filter cloth.

[0039] In actual operation, when performing suction filtration, a negative pressure environment is formed between the Buchner funnel 2 and the filter flask. The suction-filtered liquid passes through the filter paper 4 and enters the filter flask. Supported by the porous plastic spacer film 1, the filter paper 4 can withstand uniform pressure and is not easily damaged. Experimental results show that after using the porous plastic spacer film 1, even under high negative pressure suction filtration conditions, the filter paper 4 remains intact, and both the filtration efficiency and separation effect are significantly improved. Compared with the traditional method of stacking multiple layers of filter paper 4, the porous plastic spacer film 1 significantly reduces the usage amount of the filter paper 4, lowers the experimental cost, and is simple and convenient to operate; compared with the method of using a filter cloth, this spacer film fits better with the suction filtration holes 3 of the Buchner funnel 2, solves the problem of liquid leakage, and has no cleaning trouble.

[0040] Through the above embodiments, the utility model realizes uniform support and anti-breakage protection for the filter paper 4, ensures the smooth progress of the solid-liquid separation process, avoids various drawbacks in the use of traditional filter paper 4 or filter cloth, and significantly improves the success rate and efficiency of the experiment. This improved structure not only optimizes the existing laboratory suction filtration operation but also provides an economical, efficient, and easy-to-operate solution for related fields.

[0041] In the present utility model, unless otherwise clearly defined and limited, terms such as "installation", "setting", "connection", "fixation", "swivel connection", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present utility model, the present utility model can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, it is intended to include all changes falling within the meaning and scope of the equivalent elements of the claims in the present utility model.

Claims

1. A porous plastic pad film for solid-liquid separation by Buchner funnel suction filtration, characterized in that, The porous plastic pad film is in a sheet structure and is used to be disposed between the suction filtration hole of the Buchner funnel and the filter paper; The diameter of the porous plastic pad film is more than 0.83 times the diameter of the filter paper. The edge of the porous plastic pad film corresponds to and closely fits with the edge of the suction filtration hole of the Buchner funnel, so that the porous plastic pad film covers the suction filtration hole of the Buchner funnel but does not completely cover the bottom of the Buchner funnel; The porous plastic pad film includes holes densely distributed on the porous plastic pad film. The porous plastic pad film with holes is located between the suction filtration hole of the Buchner funnel and the filter paper and is used to provide uniform support for the filter paper and prevent the filter paper from being punctured due to negative pressure during suction filtration.

2. A porous plastic pad film for solid-liquid separation by Buchner funnel suction filtration according to claim 1, characterized in that, The diameter of the porous plastic pad film is 0.83 to 0.91 times the diameter of the filter paper.

3. A porous plastic membrane for Buchner funnel suction filtration solid-liquid separation according to claim 1, characterized in that The porous plastic pad film is in a circular sheet structure.

4. A porous plastic pad film for solid-liquid separation by Buchner funnel suction filtration according to claim 3, characterized in that, The fact that the edge of the porous plastic pad film corresponds to the edge of the suction filtration hole of the Buchner funnel means that the circular center line of the circular sheet and the center line of the filter paper are on the same straight line.

5. A porous plastic membrane pad for solid-liquid separation by Buchner funnel suction filtration according to claim 4, characterized in that, The Buchner funnel is a cylindrical Buchner funnel with a groove at one end. The axis line of the cylindrical Buchner funnel with a groove and the circular center line of the circular sheet are on the same straight line.

6. A porous plastic pad film for Buchner funnel suction filtration solid-liquid separation according to claim 1, characterized in that, The holes are evenly distributed on the porous plastic pad film.

7. A porous plastic membrane for solid-liquid separation by Buchner funnel suction filtration according to claim 1, characterized in that The porous plastic pad film is made of a material that is corrosion-resistant and chemically inert. The materials include but are not limited to self-sealing bag plastic, umbrella cloth, acrylic, spandex, polyamide or spandex.

8. A porous plastic pad film for solid-liquid separation by Buchner funnel suction filtration according to claim 1, characterized in that, The geometric shape of the holes includes but is not limited to circular and oval, and the arrangement form of the holes is regular or irregular arrangement.

9. A porous plastic pad film for solid-liquid separation by Buchner funnel suction filtration according to claim 1, characterized in that, The thickness of the porous plastic pad film is less than the thickness of the filter paper to ensure that the laying of the porous plastic pad film on the suction filtration hole of the Buchner funnel does not affect the close fit between the filter paper and the Buchner funnel.

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