Needle type filtering device

Abstract

The utility model discloses a needle type filtering device which comprises a needle type filter main body and a circular clamping ring, the needle type filter main body is clamped on the inner wall of the circular clamping ring, two vertically upward connecting plates are fixedly arranged on the outer wall of the circular clamping ring, vertically upward arc-shaped clamping plates are fixedly arranged on the side walls of the tops of the connecting plates, and the arc-shaped clamping plates are fixedly arranged on the outer wall of the circular clamping ring. Pull blocks are fixedly arranged on the outer walls of one sides of the tops of the two arc-shaped clamping plates, the needle type filter main body comprises an upper shell, a lower shell, a permeable membrane and a fixing ring, and the upper shell is arranged at the top of the lower shell. The two pull blocks are pulled by two fingers to press the injector, the two pull blocks drive the circular clamping ring to move towards the direction of the injector through the arc-shaped clamping plate and the connecting plate, upward force is applied to the needle type filter body through the circular clamping ring, and the fixing effect on the needle type filter body is good; and the connection part of the needle type filter and the injector can be prevented from falling off.

Description

Technical Field

[0001] The utility model relates to the technical field of filtering equipment, in particular to a needle-type filtering device. Background Art

[0002] The shell material of the needle filter is made of high-quality sanitary polypropylene. The product structure is precisely designed to ensure smooth filtration, rational internal space, and very low residual rate. The needle filter can be used in HPLC analysis and IC analysis to filter sample solutions, which is an important step in the sample pretreatment process.

[0003] The existing needle filter is directly connected to the injection port of the syringe. As the needle filter filters liquid, the internal resistance of the needle filter increases, and the force of the syringe injected into the needle filter needs to be increased. The pressure inside the needle filter increases, and the container at the connection between the needle filter and the syringe falls off. In order to prevent the connection between the needle filter and the syringe from falling off, we propose a needle filter device. Utility Model Content

[0004] The purpose of the utility model is to provide a needle filter device to solve the above-mentioned shortcomings in the technology.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical solutions: a needle filter device, comprising a needle filter body and a circular clamping ring, the needle filter body is clamped on the inner wall of the circular clamping ring, the outer wall of the circular clamping ring is fixed with two vertically upward connecting plates, the top side wall of the connecting plate is fixed with a vertically upward arc-shaped clamping plate, and the outer wall of the top side of the two arc-shaped clamping plates is fixed with a pull block.

[0006] Preferably, the needle filter body comprises an upper shell, a lower shell, a permeable membrane and a fixing ring, the upper shell is arranged on the top of the lower shell, the permeable membrane is clamped between the upper shell and the lower shell, and the fixing ring is sleeved on the outer walls of the upper shell and the lower shell.

[0007] Preferably, the top center position of the upper shell is connected to a docking tube through an opening, which facilitates connection with a syringe, and the bottom center position of the lower shell is connected to a liquid outlet pipe through an opening, which facilitates discharge of filtered liquid.

[0008] Preferably, the inner walls of the two arc-shaped clamping plates are in contact with the outer wall of the syringe.

[0009] In the above technical solution, the technical effects and advantages provided by the utility model are:

[0010] The syringe is pressed by pulling the two pull blocks with two fingers. The two pull blocks drive the circular clamping ring to move toward the syringe through the arc-shaped clamping plate and the connecting plate. The circular clamping ring applies an upward force to the needle filter body, which has a good fixing effect on the needle filter body and can prevent the connection between the needle filter and the syringe from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present utility model. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0012] Figure 1 This is a three-dimensional structural schematic diagram of a needle-type filter device of the utility model;

[0013] Figure 2 This is a schematic diagram of a circular clamping ring structure of a needle-type filter device of the utility model;

[0014] Figure 3 This is a schematic diagram of the main structure of a needle filter of a needle filter device of the utility model;

[0015] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a needle filter main body of a needle filter device.

[0016] Description of reference numerals:

[0017] 1 upper shell, 2 lower shell, 3 butt joint, 4 liquid outlet pipe, 5 permeable membrane, 6 fixing ring, 7 circular clamping ring, 8 connecting plate, 9 arc clamping plate, 10 pulling block. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0019] Embodiment 1

[0020] Refer to the instruction manual Figure 1-4 A needle filter device comprises a needle filter body and a circular clamping ring 7. The needle filter body is clamped on the inner wall of the circular clamping ring 7. Two vertically upward connecting plates 8 are fixed on the outer wall of the circular clamping ring 7. A vertically upward arc-shaped clamping plate 9 is fixed on the top side wall of the connecting plate 8. A pull block 10 is fixed on the outer wall of one side of the top of the two arc-shaped clamping plates 9.

[0021] Embodiment 2

[0022] Based on the first embodiment, the needle filter body includes an upper shell 1, a lower shell 2, a permeable membrane 5 and a fixing ring 6. The upper shell 1 is arranged on the top of the lower shell 2, the permeable membrane 5 is clamped between the upper shell 1 and the lower shell 2, and the fixing ring 6 is sleeved on the outer walls of the upper shell 1 and the lower shell 2. The top center position of the upper shell 1 is connected with a docking tube 3 through an opening, which is convenient for connecting with a syringe. The bottom center position of the lower shell 2 is connected with a liquid outlet pipe 4 through an opening, which is convenient for discharging the filtered liquid through the liquid outlet pipe 4. The inner walls of the two arc-shaped clamping plates 9 are in contact with the outer wall of the syringe.

[0023] Working principle of this utility model:

[0024] Refer to the instruction manual Figure 1-4 When the utility model is used, the butt joint 3 is firstly connected to the injection port of the syringe. At this time, the circular clamping ring 7 is sleeved on the outer wall of the needle filter main body shell, and the two arc-shaped clamping plates 9 are respectively attached to the outer walls on both sides of the syringe. At this time, the user uses two fingers to pull the two pull blocks 10 to press the syringe. The two pull blocks 10 drive the circular clamping ring 7 to move toward the syringe through the arc-shaped clamping plates 9 and the connecting plate 8. The circular clamping ring 7 applies an upward force to the needle filter, which can prevent the connection between the needle filter and the syringe from falling off, and the fixing effect is good.

[0025] The above only describes some exemplary embodiments of the present invention by way of illustration. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A needle filter device, comprising a needle filter body and a circular clamping ring (7), wherein the needle filter body is clamped to the inner wall of the circular clamping ring (7), characterized in that: Two vertically upward connecting plates (8) are fixedly provided on the outer wall of the circular clamping ring (7), a vertically upward arc-shaped clamping plate (9) is fixedly provided on the top side wall of the connecting plate (8), and a pull block (10) is fixedly provided on the outer wall of one side of the top of the two arc-shaped clamping plates (9).

2. A needle filter device according to claim 1, characterized in that: The needle filter body comprises an upper shell (1), a lower shell (2), a permeable membrane (5) and a fixing ring (6); the upper shell (1) is arranged on the top of the lower shell (2); the permeable membrane (5) is clamped between the upper shell (1) and the lower shell (2); and the fixing ring (6) is sleeved on the outer walls of the upper shell (1) and the lower shell (2).

3. A needle filter device according to claim 2, characterized in that: The top center position of the upper shell (1) is connected to a butt joint pipe (3) through an opening, and the bottom center position of the lower shell (2) is connected to a liquid outlet pipe (4) through an opening.

4. A needle filter device according to claim 1, characterized in that: The inner walls of the two arc-shaped clamping plates (9) are in contact with the outer wall of the syringe.

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