CN219104802U

CN219104802U - Pure water pH measurement system

Info

Publication number: CN219104802U
Application number: CN202223176406.4U
Authority: CN
Inventors: 柏永春; 陈立志
Original assignee: Nanjing Lemon Technology Development Co ltd
Current assignee: Nanjing Lemon Technology Development Co ltd
Priority date: 2022-11-29
Filing date: 2022-11-29
Publication date: 2023-05-30
Anticipated expiration: 2032-11-29

Abstract

The utility model discloses a pure water pH measurement system, which comprises a fixing frame, wherein a reagent bottle, a flow cell, a peristaltic pump, a buffer tube and a sample injection connector are arranged on the fixing frame; the sample injection joint is connected with the tee joint through the PU pipe, the middle joint of the tee joint is connected with the water outlet end of the peristaltic pump, the water inlet end of the peristaltic pump is connected with the reagent bottle, the drainage joint of the tee joint is connected with the buffer pipe, and the buffer pipe is connected with the flow cell. The pure water PH measurement system provided by the utility model is isolated from the outside air, so that the pollution of carbon dioxide to sample water is prevented; in addition, a micro neutral regulator is added into the sample water to increase the conductivity of the sample water, thereby avoiding the influence of static charge; and the flow direction of sample water in the flow cell adopts a rotational flow design, so that the electrode friction is reduced, the liquid connection potential is stabilized, the static charge interference is reduced, and the stability and the accuracy of measuring the PH value of the pure water are obviously improved.

Description

Pure water pH measurement system

Technical Field

The utility model relates to the technical field of PH measurement, in particular to a pure water pH measurement system.

Background

High purity water often requires measurement of its PH during use to meet the needs of some use scenarios. The current measurement of the PH of high purity water using PH meters tends to suffer from the following problems: 1. carbon dioxide in the environment affects, resulting in a decrease in the pH value of pure water; 2. the flow rate has a great influence on the pH measurement of the pure water, and if the flow rate is unstable, the junction potential E6 and the diffusion potential E5 are unstable, so that the pH measurement is unstable and inaccurate; 3. the conductivity of high purity water is very poor, and is easy to be interfered by external electromagnetic fields, and meanwhile, static electricity, impact and the like are very easy to generate in the flowing process, so that the measurement stability and accuracy are affected.

Disclosure of Invention

The utility model aims to provide a pure water pH measuring system for solving the problems in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the pure water pH measurement system comprises a fixing frame, wherein a reagent bottle, a flow cell, a peristaltic pump, a buffer tube and a sample injection connector are arranged on the fixing frame;

the sample injection joint is connected with the tee joint through the PU pipe, the middle joint of the tee joint is connected with the water outlet end of the peristaltic pump, the water inlet end of the peristaltic pump is connected with the reagent bottle, the drainage joint of the tee joint is connected with the buffer pipe, and the buffer pipe is connected with the flow cell.

As a preferable technical scheme of the utility model, the cover of the flow cell is provided with external threads, and the port at the upper part of the flow cell is provided with internal threads.

As a preferable technical scheme of the utility model, the pool cover is provided with a mounting hole, and a sealing ring is arranged in the mounting hole.

As a preferable technical scheme of the utility model, the sample injection joint is connected with a sample water pipe.

As a preferred technical scheme of the utility model, the peristaltic pump is a constant peristaltic pump.

As a preferable technical scheme of the utility model, the flow cell is provided with a first internal thread and a second internal thread, a baffle is arranged in the flow cell, and holes are formed around the baffle.

The utility model has the technical effects and advantages that: the pure water PH measurement system provided by the utility model is isolated from the outside air, so that the pollution of carbon dioxide to sample water is prevented; in addition, a micro neutral regulator is added into the sample water to increase the conductivity of the sample water, thereby avoiding the influence of static charge; and the flow direction of sample water in the flow cell adopts a rotational flow design, so that the electrode friction is reduced, the liquid connection potential is stabilized, the static charge interference is reduced, and the stability and the accuracy of measuring the PH value of the pure water are obviously improved.

Drawings

FIG. 1 is a schematic diagram of a system according to the present utility model.

FIG. 2 is a schematic diagram of the interior of a flow cell of the present utility model.

In the figure: 1-a fixing frame; 2-sample introduction joint; 3-buffer tube; 4-reagent bottles; 5-a flow cell;

6-peristaltic pump; 51-first internal thread; 52-a baffle; 53-second internal thread.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-2, a pure water pH measurement system comprises a fixing frame 1, wherein the fixing frame 1 can be made of stainless steel, and a reagent bottle 4, a flow cell 5, a peristaltic pump 6, a buffer tube 3, a sample injection joint 2 and a common pipeline connecting piece are arranged on the fixing frame 1, wherein the peristaltic pump 6 is a constant micro peristaltic pump.

The sample injection joint 2 is connected with a sample water pipe, meanwhile, the sample injection joint 2 is connected with a three-way joint through a PU pipe, an intermediate joint of the three-way joint is connected with a water outlet end of a peristaltic pump 6, a water inlet end of the peristaltic pump 6 is connected with a reagent bottle 4, a drainage joint of the three-way joint is connected with a buffer pipe 3, and the buffer pipe 3 is connected with a flow cell 5.

In this embodiment, the cell cover of the flow cell 5 is provided with external threads, the port at the upper part of the flow cell 5 is provided with internal threads, the cell cover is provided with a mounting hole, and a sealing ring is arranged in the mounting hole.

In the embodiment, a first internal thread 51 and a second internal thread 53 are arranged on a flow cell 5, a baffle plate 52 is arranged in the flow cell 5, holes are formed in the periphery of the baffle plate 52, a cell cover is made of black engineering plastic materials, external threads on a cover are screwed on the internal threads of the stainless steel flow cell, two mounting holes on the cell cover are formed near the center of the cover, the diameter of a large hole is 13mm, the diameter of a small hole is 6.5mm, the upper side of the large hole is provided with PG13.5 internal threads, and the depth of the large hole is 13mm; the sample water enters the flow cell 5, and then, the sample water does not directly enter the flow cell 5 due to the baffle plate 52, but enters the flow cell 5 by rotating along the side surface of the baffle plate 52.

In this embodiment, the peristaltic pump 6 is used to stably add the regulating agent into the sample water, the buffer tube 3 is used to dissolve the regulating agent, the mixture is uniform, the regulated sample water enters the flow cell 5, the flow rate of the sample water is slowed down, so that the pH electrode is stably measured, and the sample water is discharged through the overflow port of the flow cell 5.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and "secured" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Standard parts used by the utility model can be purchased from the market, and special-shaped parts can be customized according to the description of the specification and the drawings.

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

Claims

1. A pure water pH measurement system, characterized by: the device comprises a fixing frame (1), wherein a reagent bottle (4), a flow cell (5), a peristaltic pump (6), a buffer tube (3) and a sample injection joint (2) are arranged on the fixing frame (1);

sample introduction joint (2) are through PU union coupling three way connection, and three way connection intermediate head and peristaltic pump (6) play water end are connected, peristaltic pump (6) advance water end and are connected with reagent bottle (4), three way connection's drainage joint inserts buffer tube (3), and buffer tube (3) are connected with flow cell (5).

2. The pure water pH measurement system according to claim 1, wherein: the cell cover of the flow cell (5) is provided with external threads, and the port at the upper part of the flow cell (5) is provided with internal threads.

3. A pure water pH measurement system according to claim 2, wherein: the pool cover is provided with a mounting hole, and a sealing ring is arranged in the mounting hole.

4. The pure water pH measurement system according to claim 1, wherein: the sample injection joint (2) is connected with a sample water pipe.

5. The pure water pH measurement system according to claim 1, wherein: the peristaltic pump (6) is a constant peristaltic pump.

6. The pure water pH measurement system according to claim 1, wherein: the flow cell (5) is provided with a first internal thread (51) and a second internal thread (53), a baffle plate (52) is arranged in the flow cell (5), and holes are formed in the periphery of the baffle plate (52).