Online automatic sampling device for detecting anions and cations in water

Abstract

The utility model relates to the technical field of water quality detection, in particular to an on-line automatic sampling device for detecting anions and cations in water. The on-line automatic sampling device comprises a water storage tank and a sewage tank, a branch pipe A and a branch pipe B are mounted on the water storage tank, a three-way electromagnetic valve A and a three-way electromagnetic valve B are mounted on the branch pipe A and the branch pipe B through pipelines respectively, and a plunger pump is mounted on the pipeline between the three-way electromagnetic valve A and the three-way electromagnetic valve B. According to the on-line automatic sampling device for detecting the anions and the cations in the water, the cleanliness of a pipeline is greatly improved through two-way flushing, meanwhile, a filter element of a water sample purifying and filtering unit is enhanced through high-pressure water back flushing, the service life of the filter element is effectively prolonged, and the hidden danger that the filter element is prone to being blocked is reduced; due to the innovative design of chemical cleaning and high-precision sampling of the plunger pump, the stability of the online sampling device is improved, and the service life of the online sampling device is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water quality detection, in particular to an online automatic sampling device for detecting anions and cations in water. Background Art

[0002] With the rapid development of industry and agriculture, large amounts of industrial and domestic sewage, garbage, and industrial wastewater are continuously entering water bodies, leading to increasingly severe water pollution and posing a significant threat to the environment and human health. Excessive levels of anions and cations in water not only harm the health of plants and animals in the environment, but also harm human health, leading to various diseases. Therefore, monitoring and studying anions and cations in water has garnered widespread attention from researchers. Traditional methods for detecting anions and cations in water include ICP (inductively coupled plasma emission spectrometry) and electrophoresis, but these methods suffer from high interference, poor stability and sensitivity, and complex operation.

[0003] At present, the methods for detecting anions and cations in water mostly adopt on-site sampling and manual sampling and analysis in the laboratory offline. The whole process requires human participation, such as manual sampling and sampling. This method cannot meet the requirements of on-site continuous monitoring of water pollution, especially in response to emergencies. Moreover, due to human errors, the accuracy of experimental data is affected, resulting in the accuracy of the test results being affected. To solve this problem, in the patent document with publication number CN212483001U, a three-way solenoid valve is used to control the filtered water sample or switch the pure water inlet to clean the pipeline, and then the water is pumped into the ion chromatography sample bottle by a peristaltic pump, and the next operation is performed according to the timing. However, in the patent document with publication number CN212483001U, only relying on forward flushing with pure water cannot remove deep particles or biofilms in the filter element, and the accumulation of pollutants will reduce the filtration efficiency, thereby breeding microbial pollution system.

[0004] In order to solve the above problems, it is necessary to improve the structure of the pure water bottle based on the structure of publication number CN212483001U to solve the above technical problems. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides an online automatic sampling device for detecting anions and cations in water.

[0006] The utility model provides an online automatic sampling device for anion and cation detection in water, comprising a water storage tank and a sewage tank, wherein a branch A pipe and a branch B pipe are installed on the water storage tank, and the branch A pipe and the branch B pipe are respectively installed with a three-way electromagnetic valve A and a three-way electromagnetic valve B through pipelines, and a plunger pump is installed on the pipeline between the three-way electromagnetic valve A and the three-way electromagnetic valve B;

[0007] Two water inlet pipelines are installed on the sewage tank, and the two water inlet pipelines are fixedly connected to the water inlet interface of the water sample purification and filtration unit and the drainage interface of the three-way electromagnetic B valve respectively. The two water inlet pipelines on the sewage tank are fixedly installed with control A valve and control B valve respectively.

[0008] Preferably, a turbidity sensor is installed on the pipeline between the three-way electromagnetic A valve and the control A valve.

[0009] Preferably, an agitator is installed on the water tank.

[0010] Preferably, the agitator includes a drive motor, which is fixedly mounted on the water tank via a frame, and a stirring shaft is fixedly mounted on the output end of the drive motor, and a plurality of annularly distributed stirring blades are mounted on the stirring shaft.

[0011] Preferably, the water storage tank is provided with a feed port for feeding materials.

[0012] Preferably, the three-way electromagnetic B valve is connected to the ion chromatography inlet or the purge and trap system through a pipeline.

[0013] Preferably, two submersible pumps are installed in the water storage tank, and the output ends of the two submersible pumps are connected to the branch A pipe and the branch B pipe respectively.

[0014] Compared with related technologies, the online automatic sampling device for anion and cation detection in water provided by the utility model has the following beneficial effects:

[0015] The utility model greatly improves the cleanliness of the pipeline through two-way flushing, and at the same time uses high-pressure water back flushing to enhance the filter element of the water sample purification filter unit, effectively extending the life of the filter element and reducing the hidden danger of filter element clogging. The innovative design of chemical cleaning and high-precision sampling by the plunger pump improves the stability and life of the online sampling device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of an online automatic sampling device for detecting anions and cations in water provided by the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure of the water tank shown.

[0018] Numbers in the figure: 1. Water storage tank; 1a. Feed inlet; 11. Branch pipe A; 12. Branch pipe B; 13. Agitator; 131. Drive motor; 132. Agitator shaft; 133. Agitator blade; 2. Three-way solenoid valve A; 3. Plunger pump; 4. Three-way solenoid valve B; 5. Sewage tank; 6. Control valve A; 7. Control valve B; 8. Turbidity sensor. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0021] See also Figures 1 to 2 The embodiment of the present invention provides an online automatic sampling device for detecting anions and cations in water. The online automatic sampling device for detecting anions and cations in water includes a water tank 1, a plunger pump 3 and a sewage tank 5. The water tank 1 and the plunger pump 3 in this application replace the pure water bottle and the peristaltic pump in the patent document with publication number CN212483001U respectively.

[0022] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 A branch A pipe 11 and a branch B pipe 12 are installed on the water storage tank 1, and the branch A pipe 11 and the branch B pipe 12 are respectively installed with a three-way electromagnetic A valve 2 and a three-way electromagnetic B valve 4 through pipelines. The three-way electromagnetic B valve 4 is connected to the ion chromatography inlet or the purge and capture system through a pipeline. A plunger pump 3 is installed on the pipeline between the three-way electromagnetic A valve 2 and the three-way electromagnetic B valve 4. Two water inlet pipelines are installed on the sewage tank 5, and the two water inlet pipelines are respectively fixedly connected to the water inlet interface of the water sample purification and filtration unit and the drainage interface of the three-way electromagnetic B valve 4. The two water inlet pipelines on the sewage tank 5 are respectively fixedly installed with a control A valve 6 and a control B valve 7, and a turbidity sensor 8 is installed on the pipeline between the three-way electromagnetic A valve 2 and the control A valve 6.

[0023] It should be noted that: a pipeline of the sewage tank 5 is connected to the water inlet of the water sample purification and filtration unit in the patent document with publication number CN212483001U, and the three-way electromagnetic B valve 4 is connected to the ion chromatography inlet or the purge and trap system through a pipeline;

[0024] After the experiment is completed, the pipeline is flushed through the water tank 1, specifically,

[0025] Open the three-way electromagnetic A valve 2, the three-way electromagnetic B valve 4 and the control B valve 7, and close the control A valve 6. Therefore, the flushing path of the water tank 1 is:

[0026] Water storage tank 1 → branch A pipe 11 → three-way electromagnetic A valve 2 → plunger pump 3 → three-way electromagnetic B valve 4 → sewage tank 5;

[0027] The pipeline is then backwashed again through the water storage tank 1, specifically,

[0028] Open the three-way electromagnetic valve A 2, the three-way electromagnetic valve B 4 and the control valve A 6, and close the control valve B 7. Therefore, the flushing path of the water tank 1 is:

[0029] Water storage tank 1 → branch B pipe 12 → three-way electromagnetic B valve 4 → plunger pump 3 → three-way electromagnetic A valve 2 → turbidity sensor 8 → water sample purification and filtration unit in the patent document with publication number CN212483001U → sewage tank 5;

[0030] Therefore, the pipeline is regularly flushed forward and backward through the water tank 1, which greatly improves the cleanliness of the pipeline. At the same time, the filter element of the water sample purification filter unit in the patent document with publication number CN212483001U is backwashed with high-pressure water, which effectively extends the life of the filter element and reduces the hidden danger of filter element clogging.

[0031] In this embodiment, the plunger pump 3 replaces the peristaltic pump in the patent document CN212483001U, thereby eliminating the pulsation problem of the peristaltic pump and making the accuracy reach ±1% (peristaltic pumps are usually ±2-5%).

[0032] Among them, the turbidity sensor 8 is provided to provide real-time feedback on the flushing effect and prompt the staff to perform forward and reverse flushing operations.

[0033] In the embodiments of the present invention, please refer to Figure 1 and Figure 2 A stirrer 13 is installed on the water tank 1, and the stirrer 13 includes a drive motor 131. The drive motor 131 is fixedly mounted on the water tank 1 through a frame, and a stirring shaft 132 is fixedly mounted on the output end of the drive motor 131. A plurality of annularly distributed stirring blades 133 are mounted on the stirring shaft 132. A feeding port 1a for feeding is opened on the water tank 1. Two submersible pumps are installed in the water tank 1, and the output ends of the two submersible pumps are respectively connected to the branch A pipe 11 and the branch B pipe 12.

[0034] It should be noted that: by adding citric acid or sodium hypochlorite solution into the water tank 1, and then turning on the drive motor 131 to drive the stirring shaft 132 to rotate, the stirring blade 133 can quickly stir and mix the citric acid or sodium hypochlorite solution added to the pure water, and then use forward and backwashing to dissolve inorganic / organic sediments in the water sample purification filter unit filter element.

[0035] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0036] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An online automatic sampling device for detecting anions and cations in water, comprising a water storage tank (1) and a sewage tank (5), characterized in that: The water storage tank (1) is provided with a branch A pipe (11) and a branch B pipe (12), and the branch A pipe (11) and the branch B pipe (12) are respectively provided with a three-way electromagnetic A valve (2) and a three-way electromagnetic B valve (4) through pipelines, and a plunger pump (3) is provided on the pipeline between the three-way electromagnetic A valve (2) and the three-way electromagnetic B valve (4); Two water inlet pipelines are installed on the sewage tank (5), and the two water inlet pipelines are fixedly connected to the water inlet interface of the water sample purification and filtration unit and the drainage interface of the three-way electromagnetic B valve (4), respectively. The two water inlet pipelines on the sewage tank (5) are fixedly installed with a control A valve (6) and a control B valve (7).

2. The online automatic sampling device for detecting anions and cations in water according to claim 1, characterized in that: A turbidity sensor (8) is installed on the pipeline between the three-way electromagnetic A valve (2) and the control A valve (6).

3. The online automatic sampling device for detecting anions and cations in water according to claim 1, characterized in that: The water storage tank (1) is equipped with an agitator (13).

4. The online automatic sampling device for detecting anions and cations in water according to claim 3, characterized in that: The stirrer (13) comprises a drive motor (131), the drive motor (131) being fixedly mounted on the water storage tank (1) via a frame, and a stirring shaft (132) being fixedly mounted on the output end of the drive motor (131), and a plurality of annularly distributed stirring blades (133) being mounted on the stirring shaft (132).

5. The online automatic sampling device for detecting anions and cations in water according to claim 3, characterized in that: The water storage tank (1) is provided with a feeding port (1a) for feeding materials.

6. The online automatic sampling device for detecting anions and cations in water according to claim 1, characterized in that: The three-way electromagnetic B valve (4) is connected to the ion chromatography inlet or the purge and trap system through a pipeline.

7. The online automatic sampling device for detecting anions and cations in water according to claim 1, characterized in that: Two submersible pumps are installed in the water storage tank (1), and the output ends of the two submersible pumps are respectively connected to the branch A pipe (11) and the branch B pipe (12).

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