CN211612287U

CN211612287U - Sample filtering device for ion chromatograph analysis system

Info

Publication number: CN211612287U
Application number: CN201921446664.5U
Authority: CN
Inventors: 潘志东; 张俊杰; 柳世波; 吴程; 胡烟华
Original assignee: Zhejiang Hengda Instruments Co ltd
Current assignee: Zhejiang Hengda Instruments Co ltd
Priority date: 2019-09-02
Filing date: 2019-09-02
Publication date: 2020-10-02
Anticipated expiration: 2029-09-02

Abstract

The utility model discloses a sample filter equipment for ion chromatograph analytic system, including the closed casing that is formed with the stock solution chamber, locate the inlet of casing upper portion lateral wall, be in the overflow mouth of coplanar with the inlet, stretch into the support in stock solution chamber downwards from the casing top, and locate the filter assembly of support lower extreme, stock solution chamber bottom forms the quiet liquid district, the height that filter assembly belongs to is located more than the quiet liquid district, filter assembly includes the filtration membrane that parallels with the casing inner bottom surface, locate the support piece of filtration membrane below, the sealing member, and be used for with the connecting piece of support piece butt in the support, form the filtrating passageway that is linked together with the stock solution chamber in the support, this filtrating passageway is located the outer one end of casing and links to each other with ion chromatograph analytic system. The utility model provides an ion chromatograph sample pretreatment problem, the filter membrane surface is parallel with jar body bottom, is unfavorable for the adhesion of particulate matter, and the cleaning-free maintenance in the use, filtration membrane installation and dismantlement are convenient.

Description

Sample filtering device for ion chromatograph analysis system

Technical Field

The utility model belongs to the technical field of the sample filters, especially, relate to a sample filter equipment for ion chromatograph analytic system.

Background

When the ion chromatograph is used for analyzing samples, because chromatograph parts all belong to precision devices and the anti-interference capability of particulate matter impurities is poor, the samples to be detected need to be subjected to filtration pretreatment.

The traditional filtration mode adopts an interception type membrane filter, and has the following problems: 1) the filter does not have a self-cleaning function, and the filtering performance of the filter is gradually reduced along with the prolonging of the service life; 2) the filter is required to be maintained regularly, and the maintenance workload is large; 3) the filtering effect is not ideal.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a filtration membrane surface can not the adhesion particulate matter, possesses self-cleaning function, and the non-washing is maintained in the use, easy dismounting's a sample filter equipment for ion chromatograph analytic system.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a sample filter equipment for ion chromatograph analytic system, including the closed casing that is formed with the stock solution chamber, locate the inlet of casing upper portion lateral wall, with the inlet in coplanar overflow mouth, stretch into the support in stock solution chamber downwards from the casing top, and locate the filter assembly of support lower extreme, stock solution chamber bottom forms the quiet liquid district, and the filter assembly place highly lies in the quiet liquid district more than, and filter assembly includes the filtration membrane that parallels with the casing inner surface, locates the support piece of filtration membrane below, and the sealing member, and is used for the connecting piece with support piece butt in the support, form the filtrating passageway that is linked together with the stock solution chamber in the support, this filtrating passageway is located the outer one end of casing and links to each other with ion chromatograph analytic system.

The shell and the filtering membrane component of the utility model adopt an integrated design, the surface of the filtering membrane is parallel to the bottom of the shell, which is not beneficial to the adhesion of particles and has better filtering effect; the design of the sample inlet and the overflow port on the same plane ensures that a sample to be filtered with enough depth is stored in the liquid storage cavity, and ensures the continuous filtration; the setting in stock solution intracavity quiet liquid district avoids treating that the sample that filters flows and causes the filter effect that the disturbance influences filtration membrane, treats simultaneously that the sample that filters carries out a preliminary sedimentation filtering action, alleviates filtration membrane's filtration burden.

Furthermore, the bottom of the shell is provided with a sample discharge port which can be connected with an air pump, and a liquid discharge valve is arranged on the sample discharge port. The stock form mouth has been seted up to the casing bottom, and one effect is the thorough emission of the stock solution intracavity water sample of being convenient for, in addition in filtering process, opens the air pump and carries out aeration cleaning to filtering membrane piece from the filtration membrane bottom, avoids the adhesion of particulate matter on filtration membrane surface.

Furthermore, the support comprises a first section body penetrating through the top surface of the shell, a second section body vertically extending downwards and a flaring section connected with the filtering component, the first section body and the second section body form the filtrate channel, and the outer diameter of the first section body is smaller than that of the second section body. The support multistage sets up the installation of being convenient for, has reduced the preparation requirement.

Furthermore, the connecting piece is of an annular structure with external threads, the end part of the flaring section is bent to form a connecting part with internal threads, and the connecting piece is in threaded connection with the connecting part to upwards support the supporting piece. The supporting piece plays a role in supporting the filtering membrane and also ensures the stable connection of the filtering membrane and the bracket.

Furthermore, the filtering assembly further comprises a sealing element which is an O-shaped sealing ring and is arranged between the connecting piece, the supporting piece and the inner wall of the bracket. The sealing member guarantees the sealing connection between support piece, connecting piece and the support, avoids in the unfiltered water sample flows into the filtrating passageway.

Furthermore, the supporting pieces are supporting plates evenly provided with through holes. The support piece forms a rigid support for the filtering membrane and simultaneously ensures that the sample smoothly passes through the filtering membrane.

The utility model has the advantages that: 1) the problem of pretreatment of the sample of the ion chromatograph is solved; 2) the surface of the filter membrane is parallel to the bottom of the tank body, so that the adhesion of particles is not facilitated; 3) the filtering device adopts compressed gas to carry out aeration cleaning on the surface of the filtering membrane, particles cannot be adhered to the surface of the filtering membrane, and cleaning and maintenance are not needed in the using process; 4) the filter membrane is convenient to mount and dismount; 5) the liquid adopts a bottom-up filtering mode, so that the blockage of the filter membrane by large particles is reduced; 6) the four-port design is adopted, and the water inlet and the water outlet work independently, so that the pollution is reduced; 7) the sample shell and the filtering membrane component adopt an integrated design, and the structure is simpler.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic sectional view of the present invention.

Fig. 3 is a perspective view of the sectional structure of the present invention.

Detailed Description

In order to make the technical solution of the present invention better understood, the following figures in the embodiments of the present invention are combined to clearly and completely describe the technical solution 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 efforts shall belong to the protection scope of the present invention.

As shown in fig. 1-3, a sample filtering device for an ion chromatograph analysis system comprises a housing 1, wherein the housing 1 comprises a bottom plate, a cylindrical side wall and a top cover, the bottom plate, the cylindrical side wall and the top cover enclose a relatively closed liquid storage cavity 11, a sample inlet 12 is formed in the side wall of the housing 1 close to the top cover, and an overflow port 13 is formed in the side wall of the housing 1 opposite to the sample inlet 12, namely, the sample inlet 12 and the overflow port 13 are positioned on the same horizontal plane; the top cover of the shell 1 is connected with the support 1, specifically, the support 1 comprises a first section body 21 vertically penetrating through the top cover of the shell 1, a second section body 22 coaxially connected below the first section body 21, and a flaring section 23 connected with the filtering component, the outer diameter of the first section body 21 is smaller than that of the second section body 22, the first section body 21 is connected with a bolt 211 and erected on the top cover of the shell 1, and a filtrate channel 24 communicated with the outside is formed in the first section body 21 and the second section body 22; the end of the flared section 23 is bent to form a connecting portion 231, and the inner wall of the connecting portion 231 is provided with internal threads.

The filtering component comprises a filtering membrane 311 made of TPFE (polytetrafluoroethylene) materials, a supporting piece 32 positioned below the filtering membrane 311, and a connecting piece 33, the shape of the supporting piece 32, the size and the adaptation of the filtering membrane 311, the supporting plate structure is an even supporting plate structure provided with a plurality of through holes 321, the filtering membrane 311 is arranged at the bending part of the flaring section 23, and is parallel to the bottom plate of the shell 1, the connecting piece 33 is of an annular structure, the outer wall of the connecting piece is provided with external threads, the connecting piece 33 can be in threaded connection with the connecting part 231, the supporting piece 32 is upwards pressed, and the supporting connection of the supporting piece 32 and the support 2. In order to ensure the sealing performance, sealing elements are arranged between the top surface of the connecting piece 33, the side wall of the supporting piece 32 and the inner wall of the bracket 2, and are of an O-shaped sealing ring structure.

The one end that filtrating passageway 24 lies in the casing 1 outside links to each other with ion chromatograph analytic system through the aspiration pump (not shown in the figure), its other end is linked together with liquid storage cavity 11, the bottom in liquid storage cavity 11 forms quiet liquid district 14, treat in quiet liquid district 14 that the filtration sample carries out a preliminary sedimentation filtration process of stewing, the burden has been lightened for filtration membrane 31, reduce the adverse effect that the sample disturbance produced to filtering simultaneously, the level that the filter assembly is located quiet liquid district 14 above, thereby as shown by the arrow in figure 2, treat that the filtration sample gets into liquid storage cavity 11 from introduction port 12, until the liquid level reaches and advances the level that mouth 12 and overflow mouth 13 are located and level, can guarantee the volume of treating the filtration sample this moment, guarantee simultaneously that the preliminary sedimentation of quiet liquid district 14 goes on smoothly. When the extraction pump extracts the filtrate from one end of the filtrate channel 24 under negative pressure, the water sample after standing, pre-precipitating and filtering is pushed by the pressure difference at two sides of the filter membrane 31, filtered by the filter membrane 31 and then conveyed to the ion chromatograph analysis system.

In order to clean the filtering membrane 31 while filtering, a sample discharge port 15 is formed in the center of the bottom plate of the shell 1, a liquid discharge valve is mounted on the sample discharge port 15 and connected with an air pump, and in the filtering process, the air pump is started to perform aeration cleaning on the filtering membrane 31 from the lower side of the filtering membrane 31, so that the adhesion of particles on the surface of the filtering membrane 31 is avoided. The sample discharge port 15 also facilitates the evacuation of the sample in the reservoir chamber 11.

The above detailed description is provided for illustrative purposes, and is not intended to limit the present invention, and any modifications and variations of the present invention are within the spirit and scope of the following claims.

Claims

1. A sample filtration device for an ion chromatograph analysis system, characterized by: comprises a closed shell (1) formed with a liquid storage cavity (11), a sample inlet (12) arranged on the side wall of the upper part of the shell (1), an overflow port (13) which is positioned on the same plane with the sample inlet (12), a bracket (2) which extends into the liquid storage cavity (11) downwards from the top of the shell (1), and a filtering component which is arranged at the lower end of the bracket (2), a static liquid area (14) is formed at the bottom of the liquid storage cavity (11), the height of the filter assembly is higher than the static liquid area (14), the filter assembly comprises a filter membrane (31) parallel to the inner bottom surface of the shell (1), a support member (32) arranged below the filter membrane (31), and a connecting member (33) used for abutting the support member (32) against the bracket (2), a filtrate channel (24) communicated with the liquid storage cavity (11) is formed in the bracket (2), the end of the filtrate channel (24) which is positioned outside the shell (1) is connected with an ion chromatograph analysis system.

2. The sample filtration device of claim 1, wherein: the bottom of the shell (1) is provided with a sample discharge port (15) which can be connected with an air pump, and a liquid discharge valve is arranged on the sample discharge port (15).

3. The sample filtration device of claim 1, wherein: the support (2) comprises a first section body (21) penetrating through the top surface of the shell (1), a second section body (22) extending vertically downwards and an opening expanding section (23) connected with the filtering component, the first section body (21) and the second section body (22) form a filtrate channel (24), and the outer diameter of the first section body (21) is smaller than that of the second section body (22).

4. The sample filtration device of claim 3, wherein: the connecting piece (33) is of an annular structure with external threads, the end part of the flaring section (23) is bent to form a connecting part (231) with internal threads, and the connecting piece (33) is in threaded connection with the connecting part (231) to upwards press the supporting piece (32).

5. The sample filtration device of claim 1, wherein: the filter assembly further comprises a sealing element which is an O-shaped sealing ring and is arranged among the connecting piece (33), the supporting piece (32) and the inner wall of the bracket (2).

6. The sample filtration device of claim 1, wherein: the supporting pieces (32) are supporting plates evenly provided with through holes (321).