CN216986537U

CN216986537U - Sample filtering device for liquid chromatography detection

Info

Publication number: CN216986537U
Application number: CN202123387754.1U
Authority: CN
Inventors: 周辉丽
Original assignee: Suzhou Suyan Pharmaceutical Analysis And Testing Technology Co ltd
Current assignee: Suzhou Suyan Pharmaceutical Analysis And Testing Technology Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-19
Anticipated expiration: 2031-12-30

Abstract

The utility model provides a sample filtering device for liquid chromatography detection, and relates to the field of liquid chromatography detection. The sample filtering device for liquid chromatography detection comprises: the side wall of the guide cylinder is connected with a joint communicated with the guide cylinder, and the lower end part of the guide cylinder is also detachably connected with a filter head; the sponge is fixed on the filter head and is positioned in the guide cylinder; and the piston slides in the guide cylinder, and extrudes the sponge when moving downwards to the bottommost end of the guide cylinder. In the sample filtering device for liquid chromatography detection provided by the utility model, the adsorption effect of the sponge on impurities on the filter head is very obvious, and the sponge cannot permeate no matter the size of the particles, so that the filtering effect on liquid is better, and the sponge can be extruded by the piston, so that the liquid adsorbed in the sponge is extruded, and the waste of raw materials is reduced.

Description

Sample filtering device for liquid chromatography detection

Technical Field

The utility model relates to the field of liquid chromatography detection, in particular to a sample filtering device for liquid chromatography detection.

Background

Chromatography, also known as chromatography, is a high-performance physical separation technique that is used in analytical chemistry in conjunction with appropriate detection means to produce chromatographic analysis.

The liquid used for liquid chromatography detection needs to be filtered before use, so that insoluble solid particles contained in the liquid are removed, the prior filtering technology mainly uses a filter screen as a main filtering device, but the sizes of holes in the filter screen are fixed, so that the volume of an object which can be filtered can be only larger than the holes, and the solid particles smaller than the sizes of the holes can still penetrate through the filter screen, so that the filtering effect is poor.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a sample filtering device for liquid chromatography detection.

The utility model provides a sample filtering device for liquid chromatography detection, which comprises: the side wall of the guide cylinder is connected with a joint communicated with the guide cylinder, and the lower end part of the guide cylinder is also detachably connected with a filter head; the sponge is fixed on the filter head and is positioned in the guide cylinder; and the piston slides in the guide cylinder, and extrudes the sponge when moving downwards to the bottommost end of the guide cylinder.

Preferably, the joint is further provided with a control valve for controlling the opening and closing state of the joint.

Preferably, the lower end of the guide shell is provided with a connecting groove, and the groove wall of the connecting groove is provided with an internal thread.

Preferably, the filter head includes fixed pipe, connecting pipe and support filter screen, the connecting pipe is fixed gomphosis in fixed pipe tip, just the connecting pipe is linked together with fixed pipe, and is located the connecting pipe outer wall is equipped with the external screw thread, it connects in connecting pipe tip mouth of pipe department to support the filter screen card.

Preferably, the connecting pipe is matched with the connecting groove in size, and the connecting pipe and the connecting groove are connected through threads.

Preferably, the support filter screen is an alloy filter screen.

Preferably, a silica gel ring is bonded to the upper end of the connecting pipe.

Preferably, the sponge is bonded to a supporting screen.

Preferably, the upper end of the guide shell is clamped with a sealing cover, a penetrating push rod is connected inside the sealing cover in a sliding manner, the upper end of the push rod is fixedly embedded with a push plate, and the piston is fixedly embedded at the lower end of the push rod.

Compared with the related art, the sample filtering device for liquid chromatography detection provided by the utility model has the following beneficial effects:

in the sample filtering device for liquid chromatography detection, the adsorption effect of the sponge on impurities on the filtering head is very obvious, and the sponge cannot permeate the particles no matter the size of the particles is large, so that the filtering effect on liquid is better, and the piston can extrude the sponge, so that the liquid adsorbed in the sponge is extruded out, and the waste of raw materials is reduced.

Drawings

FIG. 1 is a schematic perspective view of a sample filtration device for liquid chromatography detection according to a preferred embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a draft tube according to the present invention;

FIG. 3 is a schematic view of the installation structure of the piston, the push rod, the sealing cover and the push plate according to the present invention;

FIG. 4 is a schematic view of the mounting arrangement of the filter head and sponge of the present invention;

FIG. 5 is a schematic view of the explosive structure of the filter head and sponge according to the present invention;

FIG. 6 is a schematic view of the construction of the joint according to the present invention;

the reference numbers in the figures: 1. a draft tube; 2. a joint; 3. a control valve; 4. sealing the cover; 5. a push rod; 6. a piston; 7. pushing the plate; 8. a filter head; 81. a fixed tube; 82. a connecting pipe; 83. supporting the filter screen; 9. a sponge; 10. connecting grooves; 11. a silica gel ring.

Detailed Description

In order to more clearly explain the overall concept of the utility model, the following detailed description is given by way of example in conjunction with the accompanying drawings.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1 to fig. 6, a sample filtering apparatus for liquid chromatography detection according to an embodiment of the present invention includes: the side wall of the guide shell 1 is connected with a joint 2 communicated with the guide shell, the lower end part of the guide shell 1 can be also detachably connected with a filter head 8, and the joint 2 is also provided with a control valve 3 for controlling the opening and closing states of the joint 2; the sponge 9, the sponge 9 is fixed on the filter head 8 and is positioned in the draft tube 1; and the piston 6 slides in the guide cylinder 1, and when the piston 6 moves downwards to the bottommost end of the guide cylinder 1, the sponge 9 is extruded.

It should be noted that: in the device, the arranged guide shell 1 has a material storage function, the joint 2 can be connected with a guide pipeline, so that liquid to be filtered is introduced into the guide shell 1, the piston 6 needs to be lifted to the uppermost part of the guide shell 1 between the introduced liquid, and the subsequently injected liquid can be positioned below the piston 6 so as to facilitate subsequent extrusion; the control valve 3 arranged on the connector 2 can realize the opening and closing of the connector 2, liquid can be introduced into the guide cylinder 1 through the connector 2 in an opening state, and the guide cylinder 1 can be sealed in a closing state, so that the gas leakage can not occur in the subsequent extrusion process of the piston 6, and the stability of the air pressure in the guide cylinder 1 can be ensured;

the filter head 8 has a certain filtering effect, and the most important function is to fix the sponge 9, so that the sponge 9 can normally play a role, the effect of the sponge 9 in filtering liquid is better, the sponge 9 can filter out the liquid no matter the size of the particle size, and the effect of filtering the liquid is improved; the piston 6 has an extrusion propulsion function, and can compress the gas in the guide cylinder 1 in the propulsion process so as to enhance the internal air pressure, so that the liquid in the guide cylinder 1 can be propelled by the air pressure, and the liquid can flow out quickly; and the piston 6 can also extrude the sponge 9, thereby extruding the liquid absorbed in the sponge 9 and avoiding the liquid from being wasted.

Referring to fig. 2, 4 and 5, the lower end of the draft tube 1 is provided with a connecting groove 10, and the wall of the connecting groove 10 is provided with an internal thread; the filter head 8 comprises a fixed pipe 81, a connecting pipe 82 and a supporting filter screen 83, wherein the connecting pipe 82 is fixedly embedded at the upper end part of the fixed pipe 81, the connecting pipe 82 is communicated with the fixed pipe 81, an external thread is arranged on the outer wall of the connecting pipe 82, the supporting filter screen 83 is an alloy filter screen and is clamped in the pipe orifice at the upper end part of the connecting pipe 82, and the upper end part of the connecting pipe 82 is bonded with a silica gel ring 11; the connecting pipe 82 is matched with the connecting groove 10 in size and is connected with the connecting groove 10 through threads; the sponge 9 is bonded on the supporting filter screen 83, so that the sponge 9 has high stability, the sponge 9 cannot deviate in the subsequent extrusion process, and the supporting filter screen 83 has water permeability and does not influence the normal circulation of liquid;

the supporting filter screen 83 is preferably made of alloy materials, so that the rigidity of the supporting filter screen can be higher, and the supporting filter screen can be used as a stress structure to better resist pressure during subsequent extrusion, so that the supporting filter screen has longer service life; the connecting pipe 82 is fixed in the guide shell 1 in a threaded connection mode, so that the connecting pipe is detachable, and the whole filter head 8 and the sponge 9 fixed on the filter head 8 can be cleaned and replaced conveniently; the silica gel ring 11 additionally arranged on the connecting pipe 82 is used as a sealing ring, and after the connecting pipe 82 is completely installed inside the guide cylinder 1, the silica gel ring 11 can fill a gap between the connecting pipe and the guide cylinder, so that the liquid is prevented from leaking.

The upper end of the guide shell 1 is clamped with a sealing cover 4, the sealing cover 4 is connected with a penetrating push rod 5 in a sliding way, the upper end of the push rod 5 is fixedly embedded with a push plate 7, and a piston 6 is fixedly embedded at the lower end of the push rod 5. When the device is used, an operator pushes the push plate 7 by hands, so that the push rod 5 is directly driven to move, the push rod 5 drives the piston 6 to move, and the piston 6 extrudes the gas and the sponge 9 in the guide cylinder 1; the sealing cover 4 is fixed at the upper end of the guide shell 1 in a clamping manner, so that the sealing cover is also detachable, and the piston 6 can be cleaned and replaced; piston 6 is the preferred rubber material, and rubber self flexibility ratio is higher, consequently when the inside slip of draft tube 1, the condition of gas leakage can not appear, and silica gel self has better corrosion resistance moreover, and life is longer relatively.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. A sample filtration device for liquid chromatography detection, comprising:

the device comprises a guide shell (1), wherein the outer wall of the guide shell (1) is connected with a joint (2) communicated with the guide shell (1), and the lower end part of the guide shell (1) is detachably connected with a filter head (8);

the sponge (9), the sponge (9) is fixed in the filter head (8), and the sponge (9) is positioned in the guide shell (1);

the piston (6) slides in inside the draft tube (1), the piston (6) is used for downwards moving to the bottom of the draft tube (1) and then extruding the sponge (9).

2. The sample filtering device for liquid chromatography detection according to claim 1, wherein the joint (2) is provided with a control valve (3) for controlling the opening and closing state of the joint (2).

3. The sample filtering device for liquid chromatography detection as claimed in claim 2, wherein the guide shell (1) is provided with a connecting groove (10) at a lower end thereof, and the wall of the connecting groove (10) is provided with an internal thread.

4. The sample filtering device for liquid chromatography detection according to claim 3, wherein the filter head (8) comprises a fixed tube (81), a connecting tube (82) and a supporting filter screen (83), the connecting tube (82) is embedded in the end of the fixed tube (81), the connecting tube (82) is communicated with the fixed tube (81), the outer wall of the connecting tube (82) is provided with an external thread matched with the internal thread, and the supporting filter screen (83) is clamped in the upper end orifice of the connecting tube (82).

5. The sample filtration device for liquid chromatography detection according to claim 4, wherein the connecting tube (82) is adapted to the connecting groove (10), and the connecting tube (82) and the connecting groove (10) are connected by matching the internal thread and the external thread.

6. The sample filtration device for liquid chromatography detection according to claim 4, wherein the support screen (83) is an alloy screen.

7. The sample filtering device for liquid chromatography detection according to claim 4, wherein a silicone ring (11) is bonded to the upper end of the connecting tube (82).

8. The sample filtration device for liquid chromatography detection according to claim 4, wherein the sponge (9) is bonded in a position above the support screen (83).

9. The sample filtering device for liquid chromatography detection according to claim 1, wherein a sealing cover (4) is clamped at the upper end of the guide shell (1), a push rod (5) penetrating through the sealing cover (4) is slidably connected inside the sealing cover (4), a push plate (7) is fixed at the upper end of the push rod (5), and the piston (6) is fixed at the lower end of the push rod (5).