Online sample purification device

Abstract

The utility model belongs to the technical field of ion chromatographs, and particularly relates to an online sample purification device which comprises a four-way valve and a feeding pipe, the feeding pipe is fixedly connected to a valve port at the left end of the four-way valve, the four-way valve is in signal connection with a controller, and the outer end of the four-way valve is connected with a purification mechanism. According to the on-line sample purification device, when a six-way valve in an ion chromatograph conveys a to-be-detected sample to a chromatographic column, the to-be-detected sample firstly enters the four-way valve through the feeding pipe, then enters the communicated connecting pipe and then enters the purification cylinder to react with resin in the purification cylinder, ions which do not need to be detected in the sample are adsorbed, and then the to-be-detected sample is purified. The problems that when the ion chromatograph analyzes components to be detected, fine particulate matter in a sample blocks the interiors of pipelines and accessories, liquid leakage of a system is caused, parts are damaged, organic matter and heavy metal matter in the sample are prevented from being adsorbed on the chromatographic column and an ion exchange membrane, and the service life of consumables is affected are solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to ion chromatograph technical field especially relates to an online sample purification device. BACKGROUND

[0002] Ion chromatograph is a kind of chromatograph instrument, and ion chromatography is a kind of high performance liquid chromatography, so it is also called high performance ion chromatography (HPIC) or modern ion chromatography, and the main difference between it and traditional ion exchange column chromatography is that the resin has very high crosslinking degree and lower exchange capacity, and the sample volume is very small, and the column pump is used to deliver the eluent, and the eluent is usually detected on line automatically and continuously by electric conductivity.

[0003] However, when the existing ion chromatograph analyzes the components to be measured, the fine particulate matters in the sample can block the internal pipeline and accessories, causing system leakage and damage to parts; on the other hand, the organic matter and heavy metal substances in the sample can be adsorbed on the chromatograph and ion exchange membrane, affecting the service life of consumables.

[0004] Therefore, it is urgent to provide an online sample purification device for ion chromatograph. SUMMARY

[0005] The utility model discloses an online sample purification device to solve the problems in the above background.

[0006] To achieve the above object, the utility model provides the following technical scheme: an online sample purification device, including four-way valve and feed pipe, feed pipe fixed connection in four-way valve left end's valve port place, four-way valve (1) with controller signal connection, the outer end of four-way valve is connected with purification mechanism.

[0007] The purification mechanism includes a connecting pipe fixedly connected to the other three valve ports of the outer end of the four-way valve, the other end of the connecting pipe is fixedly connected with a purification cylinder, and the right end of the purification cylinder is fixedly connected with a feed pipe.

[0008] Further improvement lies in that the left end of the feed pipe is connected with a six-way valve in the ion chromatograph, and the right end of the feed pipe is connected with a chromatographic column in the ion chromatograph, so that when the six-way valve sends the sample to be detected to the chromatographic column, it will first enter the four-way valve through the feed pipe, then enter the connected connecting pipe, and then enter the chromatographic column through the purification cylinder and the feed pipe.

[0009] Further improvement lies in that the purification cylinder is filled with filler, and the filler is resin that adsorbs ions in the sample that do not need to be detected, so that when the sample to be detected passes through the purification cylinder, it will react with the resin therein and adsorb the ions in the sample that do not need to be detected.

[0010] Further improvement lies in that the outer end of the purification cylinder is connected with a dismounting mechanism, the dismounting mechanism comprises fixing rings fixedly connected to the left and right ends of the purification cylinder, and filter screens are arranged on the two fixing rings.

[0011] Further improvement lies in that the outer end of the purification cylinder is connected with a dismounting mechanism, the dismounting mechanism comprises fixing rings fixedly connected to the left and right ends of the purification cylinder, and filter screens are arranged on the two fixing rings.

[0012] Further improvement lies in that the outer end of the purification cylinder is connected with a dismounting mechanism, the dismounting mechanism comprises fixing rings fixedly connected to the left and right ends of the purification cylinder, and filter screens are arranged on the two fixing rings.

[0013] Further improvement lies in that the outer end of the purification cylinder is connected with a dismounting mechanism, the dismounting mechanism comprises fixing rings fixedly connected to the left and right ends of the purification cylinder, and filter screens are arranged on the two fixing rings.

[0014] In conclusion, the application discloses an online sample purification device.

[0015] The technical scheme solves the problem that when the ion chromatograph analyzes the components to be detected, the fine particulate matters in the sample block the internal pipeline and fittings, causing liquid leakage of the system and damage of the parts, and prevents the organic matters and heavy metal matters in the sample from being adsorbed on the chromatographic column and the ion exchange membrane, thereby affecting the service life of consumables.

[0016] Further, when the resin filler in the purification cylinder is deactivated after long-time reaction, the purification cylinder is removed from the connecting pipe and the purification cylinder after the connecting ring is rotated to move to the outer end of the fixing ring, then the resin filler in the connecting pipe is replaced and reinstalled, so that the purification effect of the purification device is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 It is a schematic view of the main structure of the utility model;

[0018] Fig. 2 It is the structure schematic view of the connecting place of the outer end of the purification cylinder of the utility model;

[0019] Fig. 3 It is the structure sectional view of the purification cylinder of the utility model.

[0020] In the drawing: 1, four-way valve; 2, feed pipe; 301, connecting pipe; 302, purification cylinder; 303, feed pipe; 401, fixed ring; 402, connecting ring. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be apparently and completely described below with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skilled in the art without making creative labor belong to the protection scope of the utility model.

[0022] Please refer to Figs. 1-3 The utility model provides a kind of technical scheme: an online sample purification device, including four-way valve 1 and feed pipe 2, feed pipe 2 is fixedly connected at the valve port of the left end of four-way valve 1, and the outer end of four-way valve 1 is connected with purification mechanism.

[0023] Purification mechanism includes connecting pipe 301 fixedly connected at the other three valve ports of the outer end of four-way valve 1, another end of connecting pipe 301 is fixedly connected with purification cylinder 302, and the right end of purification cylinder 302 is fixedly connected with feed pipe 303, and the left end of feed pipe 2 is connected with six-way valve in ion chromatograph, and the right end of feed pipe 303 is connected with chromatographic column in ion chromatograph. When six-way valve transports sample to be detected to chromatographic column, it will first enter four-way valve 1 through feed pipe 2, then enter connecting pipe 301 in communication, then enter chromatographic column through purification cylinder 302 and feed pipe 303. The four-way valve (1) is connected with controller signal, and the controller is PLC, and the signal cooperation of controller and four-way valve (1) makes sample to be detected enter corresponding purification cylinder 302.

[0024] Purification cylinder 302 is filled with filler, and the filler is resin for adsorbing ions in sample that need not be detected. When sample to be detected passes through purification cylinder 302, it will react with resin therein, and adsorb ions in sample that need not be detected.

[0025] The outer end of the purification cylinder 302 is connected with a dismounting mechanism, which comprises two fixed rings 401 fixedly connected to the left and right ends of the purification cylinder 302, and two filter screens 404 arranged on the two fixed rings. The pore size of the filter screens 404 is 0.45 microns, which can filter particulate matter and prevent resin loss. The outer end of the connecting pipe 301 and the feed pipe 303 is provided with a connecting ring 402. The outer side of the end of the connecting pipe 301 and the feed pipe 303 close to the purification cylinder 302 is provided with external threads, and the inner side of the connecting ring 402 is provided with internal threads. The outer side of the connecting pipe 301 and the feed pipe 303 is connected with the inner side of the connecting ring 402 through the threads. The outer side of the fixed ring 401 is slidingly connected with the inner side of the connecting ring 402, and the side of the fixed ring 401 away from the purification cylinder 302 is slidingly connected with the side of the connecting pipe 301 and the feed pipe 303 close to the purification cylinder 302. Therefore, after the purification cylinder 302 is placed between the connecting pipe 301 and the feed pipe 303, the connecting ring 402 is rotated and moved at the same time, and one end of the connecting ring 402 is moved to the outer side of the fixed ring 401. Then, the fixed rings 401 at the left and right ends of the purification cylinder 302 are limited to the inner side of the connecting ring 402, so that the purification cylinder 302 can be fixed between the connecting pipe 301 and the feed pipe 303. After the purification cylinder 302 is fixed between the connecting pipe 301 and the feed pipe 303, the filter screens 404 are pressed against the fixed rings 401.

[0026] The side of the connecting pipe 301 and the feed pipe 303 close to the purification cylinder 302 is fixedly connected with rubber pads. Therefore, after the purification cylinder 302 is installed between the connecting pipe 301 and the feed pipe 303, the rubber pads at the outer end of the connecting pipe 301 and the feed pipe 303 will contact the end of the fixed ring 401 away from the purification cylinder 302, so that the connecting pipe 301 and the feed pipe 303 can be sealed at the contact position with the fixed ring 401, preventing the sample from leaking from the contact position of the fixed ring 401 with the connecting pipe 301 and the feed pipe 303.

[0027] Working principle: When the six-way valve in the ion chromatograph delivers the sample to be detected to the chromatographic column, the sample first enters the four-way valve 1 through the feed pipe 2, then enters the connecting pipe 301, and then enters the purification cylinder 302, reacts with the resin therein, adsorbs the ions in the sample that do not need to be detected, and then enters the chromatographic column through the feed pipe 303 for detection, solving the problem that the small particles in the sample will block the pipeline and the internal parts of the fittings when the ion chromatograph analyzes the components to be detected, causing the system to leak and the parts to be damaged. Also, the organic matter and heavy metal substances in the sample can be prevented from being adsorbed on the chromatographic column and the ion exchange membrane, affecting the service life of consumables.

[0028] It is to be noted that, as used in this specification and the appended claims, the singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to "a component" can include a combination of two or more components. Additionally, the terms "comprise," "comprises," and "comprising," or any variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, unless otherwise indicated herein, the terms "first," "second," "third," etc., are not intended to denote a physical order, quantity, or importance, but rather are used for the purpose of nomenclature.

Claims

1. An online sample purification device, comprising a four-way valve (1) and a feed pipe (2), the feed pipe (2) being fixedly connected to the valve port at the left end of the four-way valve (1), the four-way valve (1) being connected to a controller signal, characterized in that: The outer end of the four-way valve (1) is connected with a purifying mechanism; The purifying mechanism comprises a connecting pipe (301) fixedly connected to the other three valve ports of the outer end of the four-way valve (1), the other end of the connecting pipe (301) is fixedly connected with a purifying cylinder (302), and the right end of the purifying cylinder (302) is fixedly connected with a material conveying pipe (303).

2. An on-line sample clean-up device according to claim 1, characterised in that: The left end of the material conveying pipe (2) is connected with a six-way valve in an ion chromatograph, and the right end of the material conveying pipe (303) is connected with a chromatographic column in the ion chromatograph.

3. An on-line sample clean-up device according to claim 1, characterised in that: The purifying cylinder (302) is filled with filler, and the filler is a resin capable of adsorbing ions in the sample which are not required to be detected.

4. An on-line sample clean-up device according to claim 1, characterised in that: The outer end of the purifying cylinder (302) is connected with a dismounting mechanism, the dismounting mechanism comprises a fixed ring (401) fixedly connected to the left and right ends of the purifying cylinder (302), and a filter sieve plate (404) is arranged on each of the two fixed rings (401), and the outer ends of the connecting pipe (301) and the material conveying pipe (303) are provided with a connecting ring (402).

5. An on-line sample clean-up device according to claim 4, characterised in that: The outer side of the end of the connecting pipe (301) and the material conveying pipe (303) close to the purifying cylinder (302) is provided with external threads, the inner side of the connecting ring (402) is provided with internal threads, the outer side of the connecting pipe (301) and the material conveying pipe (303) is provided with threads, and the threads are connected with the internal threads of the connecting ring (402), the outer side of the fixed ring (401) is slidingly connected with the inner side of the connecting ring (402), and the side of the fixed ring (401) away from the purifying cylinder (302) is slidingly connected with the side of the connecting pipe (301) and the material conveying pipe (303) close to the purifying cylinder (302).

6. An on-line sample clean-up device according to claim 4, characterised in that: The connecting pipe (301) and the material conveying pipe (303) are fixedly connected with rubber pads on the side close to the purifying cylinder (302).

7. An on-line sample clean-up device according to claim 4, characterised in that: The pore size of the filter sieve plate is 0.45 microns.

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