CN211206390U

CN211206390U - Sample introduction device of liquid chromatograph

Info

Publication number: CN211206390U
Application number: CN201921612374.3U
Authority: CN
Inventors: 郭飞; 张娟; 唐清华; 王天增
Original assignee: Shanghai Gerui Product Testing Co ltd
Current assignee: Shanghai Gerui Product Testing Co ltd
Priority date: 2019-09-25
Filing date: 2019-09-25
Publication date: 2020-08-07
Anticipated expiration: 2029-09-25

Abstract

The utility model discloses a sample feeding device of a liquid chromatograph, which comprises a filtering section, an upper connecting section and a lower connecting section, wherein the filtering section is of a circular structure, and the upper connecting section and the lower connecting section are respectively connected with the filtering section through threads; a liquid inlet is formed in the upper connecting section, and a liquid outlet is formed in the lower connecting section; a filter cavity is arranged in the filter section, and a filter plate is arranged in the filter cavity; the upper surface and the lower surface of the upper connecting section and the lower connecting section are respectively provided with a spherical surface, a plurality of liquid inlets are uniformly arranged along the spherical surfaces, the liquid outlets are arranged at the bottom end of the lower connecting section, and a plug is arranged in the liquid inlet; a liquid inlet pipe is arranged in the liquid inlet, and the liquid outlet is connected with a liquid outlet pipe which is connected with a chromatograph; the utility model discloses can realize multiple liquid sample and advance the appearance in step to the chromatograph, can filter the sample simultaneously, guarantee the purity nature of sample, avoid impurity to cause the influence to the chromatograph.

Description

Sample introduction device of liquid chromatograph

Technical Field

The utility model relates to a liquid chromatograph technical field specifically is a liquid chromatograph's sampling device.

Background

The chromatographic method is characterized in that the distribution coefficients of the components of the substance to be researched in a stationary phase and a mobile phase are slightly different, when the two phases perform relative convection motion, the substance to be researched is repeatedly distributed between the two phases, so that the original slight difference is changed into a large difference, and the components are separated, thereby achieving the purposes of separating, analyzing and determining some physicochemical properties of the substance. When a substance as a mobile phase in a chromatographic analysis is a liquid, it is called "liquid chromatography".

When liquid enters a chromatograph for analysis, if impurities are contained in the liquid, the analysis result is influenced, and the result is inaccurate.

Disclosure of Invention

An object of the utility model is to provide a sampling device of liquid chromatograph to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: a sample introduction device of a liquid chromatograph comprises a filter section, an upper connecting section and a lower connecting section, wherein the filter section is of a circular structure, and the upper connecting section and the lower connecting section are respectively connected with the filter section through threads; a liquid inlet is formed in the upper connecting section, and a liquid outlet is formed in the lower connecting section; a filter cavity is arranged in the filter section, and a filter plate is arranged in the filter cavity; the upper surface and the lower surface of the upper connecting section and the lower connecting section are respectively provided with a spherical surface, a plurality of liquid inlets are uniformly arranged along the spherical surfaces, the liquid inlets are internally provided with plugs, and the liquid outlets are arranged at the bottom end of the lower connecting section; the liquid inlet is connected with a liquid inlet pipe, the liquid outlet is connected with a liquid outlet pipe, and the liquid outlet pipe is connected with a chromatograph.

Preferably, the upper end and the lower end of the filtering section are respectively provided with a connecting belt, and the connecting belts are provided with threads; an upper connecting groove and a lower connecting groove are respectively arranged on the upper connecting section and the lower connecting section, and threads are arranged on the upper connecting groove and the lower connecting groove and are respectively matched with the threads on the connecting bands at the upper end and the lower end.

Preferably, the bottom of the upper connecting groove is provided with a sealing strip, the sealing strip is of an annular structure and is matched with the bottom of the upper connecting groove, and the sealing strip is connected with the connecting groove through a spring; and the lower connecting section is internally provided with a structure the same as that of the sealing strip.

Preferably, a support ring is arranged in the filter cavity, the support ring is fixedly arranged in the middle of the filter cavity, the filter plate is arranged on the support ring, the filter plate is attached to the wall of the filter cavity, and a filter screen is arranged in the middle of the filter plate.

Preferably, the support ring is provided with a limit column, the filter plate is correspondingly provided with a limit groove, and the limit column is matched and clamped in the limit groove; the number of the limiting columns is not less than three.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model filters the liquid passing through the filter plate, thereby ensuring the purity of the liquid entering the chromatograph and the accuracy of the result; simultaneously, set up a plurality of inlets on the upper junction piece for connect different kinds of liquid, make things convenient for the mixing in advance of liquid phase, the going on of the follow-up analysis of being convenient for.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the filtering section of the present invention;

FIG. 3 is a top view of the filter segment of the present invention;

fig. 4 is a schematic structural view of the upper connecting section of the present invention;

FIG. 5 is a schematic view of the installation of the filter plate of the present invention;

reference numbers in the figures: 1. a filtration section; 11. a filter chamber; 12. a connecting belt; 13. a support ring; 14. a limiting column; 2. an upper connecting section; 21. a liquid inlet; 22. a port plug; 23. an upper connecting groove; 24. sealing tape; 3. a lower connecting section; 31. a liquid outlet; 4. filtering the plate; 41. and (5) filtering by using a filter screen.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1-5, the present invention provides a technical solution: a sample introduction device of a liquid chromatograph comprises a filter section 1, an upper connecting section 2 and a lower connecting section 3, wherein the filter section 1 is of a circular structure, and the upper connecting section 2 and the lower connecting section 3 are respectively connected with the filter section 1 through threads; a liquid inlet 21 is arranged on the upper connecting section 2, and a liquid outlet 31 is arranged on the lower connecting section 3; a filter cavity 11 is arranged in the filter section 1, and a filter plate 4 is arranged in the filter cavity 11; the upper and lower surfaces of the upper connecting section 2 and the lower connecting section 3 are respectively provided with spherical surfaces, a plurality of liquid inlets 21 are uniformly arranged along the spherical surfaces, a plug 22 is arranged in the liquid inlet 21, and the liquid outlet 31 is arranged at the bottom end of the lower connecting section 3; the liquid inlet 21 is connected with a liquid inlet pipe, the liquid outlet 31 is connected with a liquid outlet pipe, and the liquid outlet pipe is connected with a chromatograph.

Furthermore, the upper end and the lower end of the filter section 1 are respectively provided with a connecting belt 12, and the connecting belt 12 is provided with threads; an upper connecting groove 23 and a lower connecting groove are respectively arranged on the upper connecting section 2 and the lower connecting section 3, and threads are arranged on the upper connecting groove 23 and the lower connecting groove and are respectively matched with the threads on the upper connecting belt 12 and the lower connecting belt 12.

Further, a sealing belt 24 is arranged at the bottom of the upper connecting groove 23, the sealing belt 24 is of an annular structure and is matched with the bottom of the upper connecting groove 23, and the sealing belt 24 is connected with the connecting groove 23 through a spring; the lower connecting section 3 is provided with the same structure as the sealing strip 24.

Further, a support ring 13 is arranged in the filter cavity 11, the support ring 13 is fixedly arranged in the middle of the filter cavity 11, the filter plate 4 is arranged on the support ring 13, the walls of the filter plate 4 and the filter cavity 11 are attached to each other, and a filter screen 41 is arranged in the middle of the filter plate 4.

Further, a limiting column 14 is arranged on the support ring 13, a limiting groove is correspondingly arranged on the filter plate 4, and the limiting column 14 is clamped in the limiting groove in a matching manner; the number of the limiting columns 14 is not less than three.

The working principle is as follows: according to the type of liquid to be added in analysis, the liquid pipe is connected with the liquid inlet 21 by opening the opening plug 22; the liquid enters the filter cavity 11, is filtered by the filter screen 41 on the filter plate 4, flows out of the liquid outlet 31, and is conveyed to a chromatograph for analysis through a pipeline.

The upper connecting section and the lower connecting section are respectively connected with the connecting bands 12 on the upper side and the lower side through upper connecting grooves and lower connecting grooves through threads, so that the connecting mode is firm, and the connecting bands can be detached; with the screwing of the screw thread, the connecting band 12 is pressed against the sealing band 24, and the spring connected with the sealing band 24 is compressed, so that the sealing band 24 is tightly attached to the bottom of the upper connecting groove 23; a sinking groove is arranged at the bottom of the upper connecting groove 23, and a spring is placed in the sinking groove; the spring can be used for bouncing the sealing belt 24, so that the sealing belt can be conveniently replaced. The lower connecting section 3 is also provided with a structure the same as that of the sealing belt 24, the same connection is carried out, and the connection tightness of the filtering section 1, the upper connecting section 2 and the lower connecting section 3 is ensured.

The filter plate 4 is put on the support ring 13, which is convenient for replacement, cleaning and disassembly; meanwhile, the support ring 13 is provided with a limit column 14, and the limit column 14 is inserted into the limit groove for limiting, so that the rotation of the filter plate 4 is avoided. The filter screen 41 can be replaced, and the size of impurity particles in the solution can be adaptively selected according to actual conditions.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a sampling device of liquid chromatograph which characterized in that: the filter comprises a filter section (1), an upper connecting section (2) and a lower connecting section (3), wherein the filter section (1) is of a circular structure, and the upper connecting section (2) and the lower connecting section (3) are respectively connected with the filter section (1) through threads; a liquid inlet (21) is arranged on the upper connecting section (2), and a liquid outlet (31) is arranged on the lower connecting section (3); a filter cavity (11) is arranged in the filter section (1), and a filter plate (4) is arranged in the filter cavity (11); the upper surface and the lower surface of the upper connecting section (2) and the lower connecting section (3) are respectively provided with a spherical surface, a plurality of liquid inlets (21) are uniformly arranged along the spherical surfaces, a port plug (22) is arranged in the liquid inlet (21), and the liquid outlet (31) is arranged at the bottom end of the lower connecting section (3); the liquid inlet (21) is connected with a liquid inlet pipe, the liquid outlet (31) is connected with a liquid outlet pipe, and the liquid outlet pipe is connected with a chromatograph.

2. The sample introduction device of a liquid chromatograph according to claim 1, wherein: the upper end and the lower end of the filtering section (1) are respectively provided with a connecting belt (12), and the connecting belt (12) is provided with threads; an upper connecting groove (23) and a lower connecting groove are respectively arranged on the upper connecting section (2) and the lower connecting section (3), and threads are arranged on the upper connecting groove (23) and the lower connecting groove and are respectively matched with the threads on the upper connecting belt (12) and the lower connecting belt (12).

3. The sample introduction device of a liquid chromatograph according to claim 2, wherein: a sealing belt (24) is arranged at the bottom of the upper connecting groove (23), the sealing belt (24) is of an annular structure and is matched with the bottom of the upper connecting groove (23), and the sealing belt (24) is connected with the connecting groove (23) through a spring; the lower connecting section (3) is internally provided with a structure the same as that of the sealing strip (24).

4. The sample introduction device of a liquid chromatograph according to claim 1, wherein: the filter is characterized in that a support ring (13) is arranged in the filter cavity (11), the support ring (13) is fixedly arranged in the middle of the filter cavity (11), the filter plate (4) is arranged on the support ring (13), the filter plate (4) and the wall of the filter cavity (11) are mutually attached, and a filter screen (41) is arranged in the middle of the filter plate (4).

5. The sample introduction device of a liquid chromatograph according to claim 4, wherein: a limiting column (14) is arranged on the support ring (13), a limiting groove is correspondingly arranged on the filter plate (4), and the limiting column (14) is clamped in the limiting groove in a matching manner; the number of the limiting columns (14) is not less than three.