Positive pressure extraction filter

Abstract

The utility model relates to the technical field of extraction filters, and discloses a positive pressure extraction filter which comprises a column body, the bottom of the column body is in threaded connection with a lower joint, the top of the column body is in threaded connection with an upper joint, a pair of sieve plates are arranged in the column body at intervals, and an extraction agent is placed at the interval of the pair of sieve plates. According to the positive pressure extraction device, the lower connector is in threaded connection with the bottom of the column body, the upper connector is in threaded connection with the top of the column body, the pair of sieve plates are arranged in the column body at intervals, and the extraction agent is placed at the interval of the pair of sieve plates, so that the positive pressure extraction process can be realized, and the filtering speed is greatly increased; the filtering uniformity is also improved; and the generation of foam is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of extraction, in particular to a positive pressure extraction filter. Background Art

[0002] Solid phase extraction technology is widely used as a sample pretreatment technology. It uses solid adsorbents to adsorb target compounds in liquid samples, separate them from the sample matrix and interfering compounds, and then elutes them with eluent or desorbs them by heating to achieve the purpose of separating and enriching target compounds.

[0003] Traditional solid phase extraction technology mostly uses negative pressure to suck from the bottom, so that the liquid passes through the extractant part to complete the extraction process. However, since the negative pressure is sucked through the bottom, the liquid needs to pass through the filter medium in reverse, so the filtration process is relatively slow, and during the process of passing through the bottom of the negative pressure extraction filter, the negative pressure may cause gas or bubbles to mix into the filtrate. This may affect the filtration effect, causing the filtrate to contain gas or bubbles.

[0004] Therefore, those skilled in the art provide a positive pressure extraction filter to solve the problems raised in the above background technology. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a positive pressure extraction filter, in which a lower joint is threadedly connected to the bottom of the column, an upper joint is threadedly connected to the top of the column, a pair of sieve plates are arranged at intervals inside the column, and an extractant is placed at the intervals between the pair of sieve plates, thereby realizing a positive pressure extraction process, which not only greatly improves the filtration speed, but also improves the filtration uniformity and reduces the generation of foam.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A positive pressure extraction filter comprises a column, wherein the bottom of the column is threadedly connected to a lower joint, the top of the column is threadedly connected to an upper joint, a pair of sieve plates are arranged at intervals inside the column, and an extractant is placed at the intervals between the pair of sieve plates;

[0008] Through the above technical solution, a lower joint is threadedly connected to the bottom of the column, an upper joint is threadedly connected to the top of the column, a pair of sieve plates are arranged at intervals inside the column, and an extractant is placed at the intervals between the pair of sieve plates, thereby realizing a positive pressure extraction process, which not only greatly improves the filtration speed, but also improves the uniformity of filtration and reduces the generation of foam.

[0009] Furthermore, the outer end thread sleeve of the upper joint is provided with a protective shell, and the outer surface of the protective shell is evenly provided with a plurality of anti-slip strips;

[0010] Through the above technical solution, a protective shell is provided on the threaded sleeve at the outer end of the upper joint to facilitate protection of the upper joint, and a plurality of anti-slip strips are evenly provided on the outer surface of the protective shell to facilitate installation and removal of the protective shell.

[0011] Furthermore, a plurality of reinforcing ribs are evenly arranged on one end of the outer surface of the column;

[0012] Through the above technical solution, a plurality of reinforcing ribs are evenly arranged on one end of the outer surface of the column, thereby improving the structural strength of the entire device.

[0013] Furthermore, one end of the upper joint is sleeved with a top cap;

[0014] Through the above technical solution, a top cap is sleeved on one end of the upper joint so as to facilitate sealing of the joint of the upper joint.

[0015] Furthermore, one end of the lower joint is sleeved with a bottom cap;

[0016] According to the technical solution, a bottom cap is sleeved on one end of the lower joint so as to facilitate sealing of the interface of the lower joint.

[0017] Furthermore, the column, the upper joint and the lower joint are all made of polypropylene material;

[0018] Through the above technical solution, the column, the upper joint and the lower joint are all made of polypropylene material, so that they have strong corrosion resistance and impact resistance.

[0019] The utility model has the following beneficial effects:

[0020] 1. The utility model proposes a positive pressure extraction filter, in which a lower joint is threadedly connected at the bottom of the column, an upper joint is threadedly connected at the top of the column, a pair of sieve plates are arranged at intervals inside the column, and an extractant is placed at the intervals between the pair of sieve plates, thereby realizing a positive pressure extraction process, which not only greatly improves the filtration speed, but also improves the filtration uniformity and reduces the generation of foam.

[0021] 2. The utility model proposes a positive pressure extraction filter. Since the upper joint and the lower joint at both ends of the column are connected to the column itself through threads, and a protective shell is threadedly sleeved on the outer end of the upper joint, it is convenient to install and disassemble the entire filter, and the filter can be cleaned and reused, thereby reducing the cost of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is an axonometric diagram of a positive pressure extraction filter proposed by the utility model;

[0023] Figure 2 This is an exploded view of a positive pressure extraction filter proposed by the utility model;

[0024] Figure 3 This is a cross-sectional view of a positive pressure extraction filter proposed by the utility model;

[0025] Figure 4 This is an axonometric diagram of a cylinder of a positive pressure extraction filter proposed by the utility model;

[0026] Figure 5 This is an axonometric diagram of a protective shell of a positive pressure extraction filter proposed by the utility model;

[0027] Figure 6 This is an axonometric view of an upper joint of a positive pressure extraction filter proposed by the utility model;

[0028] Figure 7 The utility model is an axonometric view of the lower joint of a positive pressure extraction filter.

[0029] Legend:

[0030] 1. Column; 2. Upper joint; 3. Lower joint; 4. Protective shell; 5. Top cap; 6. Bottom cap; 7. Reinforcement ribs; 8. Sieve plate; 9. Extractant; 10. Anti-slip strip. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-7 The utility model provides an embodiment: a positive pressure extraction filter, including a column 1, a lower joint 3 is threadedly connected at the bottom of the column 1, an upper joint 2 is threadedly connected at the top of the column 1, a pair of sieve plates 8 are arranged at the internal interval of the column 1, and an extractant 9 is placed at the interval between the pair of sieve plates 8. By threading the lower joint 3 at the bottom of the column 1, threading the upper joint 2 at the top of the column 1, a pair of sieve plates 8 are arranged at the internal interval of the column 1, and an extractant 9 is placed at the interval between the pair of sieve plates 8, the positive pressure extraction process can be realized, which not only greatly improves the filtration speed, but also improves the filtration uniformity and reduces the generation of foam.

[0033] A protective shell 4 is provided on the threaded sleeve at the outer end of the upper joint 2, and a plurality of anti-slip strips 10 are evenly arranged on the outer surface of the protective shell 4. By providing a protective shell 4 on the threaded sleeve at the outer end of the upper joint 2, it is convenient to protect the upper joint 2. A plurality of anti-slip strips 10 are evenly arranged on the outer surface of the protective shell 4, so as to facilitate the installation and disassembly of the protective shell 4. A plurality of reinforcing ribs 7 are evenly arranged on one end of the outer surface of the column 1. By evenly arranging a plurality of reinforcing ribs 7 on one end of the outer surface of the column 1, the structural strength of the entire device can be improved. A top cap 5 is provided on one end of the upper joint 2. By providing a top cap 5 on one end of the upper joint 2, it is convenient to seal the joint of the upper joint 2. A bottom cap 6 is provided on one end of the lower joint 3. By providing a bottom cap 6 on one end of the lower joint 3, it is convenient to seal the interface of the lower joint 3. The column 1, the upper joint 2 and the lower joint 3 are all made of polypropylene material. The column 1, the upper joint 2 and the lower joint 3 are all made of polypropylene material, so that they have strong corrosion resistance and impact resistance.

[0034] Working principle: A lower joint 3 is threadedly connected to the bottom of the column 1, an upper joint 2 is threadedly connected to the top of the column 1, a pair of sieve plates 8 are arranged at the internal intervals of the column 1, and an extractant 9 is placed at the intervals between the pair of sieve plates 8, so that a positive pressure extraction process can be achieved, which not only greatly improves the filtration speed, but also improves the uniformity of filtration and reduces the generation of foam. Since the upper joint 2 and the lower joint 3 at both ends of the column 1 are connected to the column 1 itself by threads, and the protective shell 4 is threadedly sleeved on the outer end of the upper joint 2, it is convenient to install and disassemble the entire filter, and the filter can be cleaned conveniently so that it can be reused, reducing the cost of use.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positive pressure extraction filter, comprising a column (1), characterized in that: The bottom of the column (1) is threadedly connected to a lower joint (3), the top of the column (1) is threadedly connected to an upper joint (2), a pair of sieve plates (8) are arranged at intervals inside the column (1), and an extractant (9) is placed at the intervals between the pair of sieve plates (8).

2. A positive pressure extraction filter according to claim 1, characterized in that: The outer end thread sleeve of the upper joint (2) is provided with a protective shell (4), and the outer surface of the protective shell (4) is evenly provided with a plurality of anti-slip strips (10).

3. A positive pressure extraction filter according to claim 1, characterized in that: A plurality of reinforcing ribs (7) are evenly arranged on one end of the outer surface of the column (1).

4. The positive pressure extraction filter according to claim 1, characterized in that: One end of the upper joint (2) is sleeved with a top cap (5).

5. The positive pressure extraction filter according to claim 1, characterized in that: One end of the lower joint (3) is sleeved with a bottom cap (6).

6. The positive pressure extraction filter according to claim 1, characterized in that: The column (1), the upper joint (2) and the lower joint (3) are all made of polypropylene material.

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