Automatic dosing device

Abstract

The utility model discloses an automatic dosing device which comprises a medicine storage tank, one side of the bottom of the medicine storage tank is communicated with a dosing pipeline, the tail end of the dosing pipeline is communicated with a tap water dosing point, a flow calibration column and a diaphragm metering pump are arranged on the dosing pipeline, the flow calibration column is located in the direction of the liquid inlet end of the diaphragm metering pump, and the diaphragm metering pump is located at the liquid outlet end of the dosing pipeline. A pressure relief pipeline is connected to the feeding pipeline and located in the liquid outlet end direction of the diaphragm metering pump through a tee joint, the tail end of the pressure relief pipeline is communicated with the medicine storage tank, the flow calibration column is used for measuring the pressure change of the medicine liquid in the calibration column to calculate the flow, and the flow is compared with the reading of the diaphragm metering pump; therefore, the error and the calibration coefficient of the metering pump are determined. Meanwhile, under multiple cooperation of a first diaphragm pressure gauge and a second diaphragm pressure gauge, double-path measurement can be conducted on the pressure of liquid in the feeding pipeline, and the PLC control center can judge the unit feeding amount, the total feeding amount, the feeding time and the like of the liquid medicine through interaction and analysis of various data.

Description

Technical Field

[0001] The utility model relates to the technical field of disinfection control systems, in particular to an automatic drug adding device. Background Art

[0002] Water disinfection refers to the removal of pathogenic microorganisms in water. Commonly used methods include chlorine disinfection, ozone disinfection, and ultraviolet disinfection. Among them, liquid chlorine disinfection has the advantages of low price and good sterilization effect. However, liquid chlorine disinfection also has obvious disadvantages. The chlorine element is easy to react with certain substances to form organic chlorides, which can cause cancer and mutagenesis, endanger human health, and pose certain safety hazards. In order to ensure the stable, safe and efficient operation of the equipment (disinfection equipment), we have imagined whether the existing liquid chlorine disinfection process can be changed to a safer sodium hypochlorite disinfection process, which aims to improve the safety of the disinfection system, realize automatic dosing, and improve the overall efficiency and water treatment effect of the control system. To this end, an automatic dosing device is proposed to meet the above needs. Utility Model Content

[0003] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the name of the utility model of this application to avoid blurring the purpose of this section, the abstract of the specification and the name of the utility model, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] Therefore, the purpose of the utility model is to provide an automatic dosing device to solve the drawbacks of the existing liquid chlorine disinfection proposed in the above background technology, and to find out whether the existing liquid chlorine disinfection process can be changed to a sodium hypochlorite disinfection process with higher safety. It aims to improve the safety of the disinfection system, realize automatic dosing, and improve the overall efficiency and water treatment effect of the control system.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an automatic dosing device, comprising a medicine storage tank, a dosing pipeline is connected to one side of the bottom of the medicine storage tank, and the end of the dosing pipeline is connected to the tap water dosing point, a flow calibration column and a diaphragm metering pump are arranged on the dosing pipeline, the flow calibration column is located in the direction of the liquid inlet end of the diaphragm metering pump, a pressure relief pipeline is connected to the dosing pipeline and located in the direction of the liquid outlet end of the diaphragm metering pump through a tee, the end of the pressure relief pipeline is connected to the medicine storage tank, and a float flowmeter and a diaphragm pressure gauge are arranged in sequence on the dosing pipeline and located in the direction of the liquid outlet end of the diaphragm metering pump;

[0006] Among them, the automatic dosing device also includes a PLC control center, which is the master control terminal of the dosing system. The PLC control center collects water quality parameters and water volume of tap water through sensors, and automatically adjusts the dosage and addition time of sodium hypochlorite.

[0007] As a preferred solution of the automatic dosing device described in the utility model, a Y-type filter and a drain valve are also provided on the dosing pipeline and located in the middle section between the medicine storage tank and the flow calibration column, and the drain valve is close to the flow calibration column.

[0008] As a preferred solution of the automatic dosing device described in the utility model, a pressure relief valve and a diaphragm pressure gauge 2 are respectively provided on the pressure relief pipeline, and the diaphragm pressure gauge 2 is close to the connection part between the pressure relief pipeline and the dosing pipeline.

[0009] As a preferred solution of the automatic dosing device described in the utility model, an injection head is also provided at the end of the dosing pipeline.

[0010] As a preferred solution of the automatic dosing device described in the utility model, a sampling valve is provided on the dosing pipeline through a three-way connection, and the sampling valve is located on the middle pipeline between the diaphragm pressure gauge and the float flowmeter.

[0011] As a preferred solution of the automatic dosing device described in the utility model, a second drain valve is also provided on the other side of the bottom of the medicine storage tank.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: for this kind of automatic dosing device, when it is necessary to disinfect the tap water, the PLC control center can collect the water quality parameters and water volume of the tap water through the sensor and analyze and calculate the dosage, dosage time and dosage frequency of sodium hypochlorite. At the same time, the diaphragm metering pump can extract the medicine liquid in the medicine storage tank through the dosing pipeline and transport it to the tap water dosing point. In this process, through multi-node detection of the flow calibration column, float flowmeter, diaphragm pressure gauge 1 and diaphragm pressure gauge 2, the PLC control center can analyze and integrate the data through data interaction and control, and coordinate the operating status and parameters of each equipment, thereby improving the dosing accuracy and safety of the disinfection system, thereby improving the overall efficiency and water treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the structure of the drug dosing pipeline system of the utility model;

[0014] Figure 2 This is a schematic diagram of the control process structure of the utility model.

[0015] In the figure: 1. Medicine storage tank; 2. Dosing pipeline; 3. Flow calibration column; 4. Diaphragm metering pump; 5. Pressure relief pipeline; 6. Float flowmeter; 7. Diaphragm pressure gauge 1; 8. Injection head; 9. Diaphragm pressure gauge 2; 10. Back pressure valve; 11. Pressure relief valve; 12. Y-type filter; 13. Drain valve 1; 14. Drain valve 2; 15. Sampling valve. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0017] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the implementation of the present invention, for the sake of convenience, the cross-sectional diagram showing the device structure will not be partially enlarged according to the general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0018] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0019] Figure 1-Figure 2 The following is a schematic diagram of the entire structure of an automatic dosing device of the utility model. Figure 1-Figure 2 An automatic dosing device of the present embodiment comprises a medicine storage tank 1, a dosing pipeline 2 is connected to one side of the bottom of the medicine storage tank 1, and the end of the dosing pipeline 2 is connected to the tap water dosing point, a flow calibration column 3 and a diaphragm metering pump 4 are arranged on the dosing pipeline 2, the flow calibration column 3 is located in the direction of the liquid inlet end of the diaphragm metering pump 4, a pressure relief pipeline 5 is connected through a tee on the dosing pipeline 2 and in the direction of the liquid outlet end of the diaphragm metering pump 4, the end of the pressure relief pipeline 5 is connected to the medicine storage tank 1, and a float flowmeter 6 and a diaphragm pressure gauge 7 are arranged in sequence on the dosing pipeline 2 and in the direction of the liquid outlet end of the diaphragm metering pump 4; wherein, the automatic dosing device also comprises a PLC control center, which is the master control terminal of the dosing system, and the PLC control center collects the water quality parameters and water volume of the tap water through sensors, and automatically adjusts the dosage and dosing time of sodium hypochlorite.

[0020] A Y-type filter 12 and a drain valve 13 are also provided on the dosing pipeline 2 and in the middle section between the medicine storage tank 1 and the flow calibration column 3, and the drain valve 13 is close to the flow calibration column 3. Here, the impurities of the medicine liquid at the initial output end of the dosing pipeline 2 can be filtered through the Y-type filter 12, thereby protecting the accessories on the equipment pipeline from wear and blockage; at the same time, after opening the drain valve 13, the unused or remaining medicine liquid in the medicine storage tank 1 can be exported and transferred, which is simple and practical; of course, it can be understood that the drain valve 13 can be in the form of a solenoid valve, which will be more convenient in use.

[0021] The pressure relief pipeline 5 is provided with a pressure relief valve 11 and a diaphragm pressure gauge 2 9, respectively, and the diaphragm pressure gauge 2 9 is close to the connection between the pressure relief pipeline 5 and the adding pipeline 2. In this embodiment, the function of the pressure relief valve 11 is to automatically open to release excess pressure when the output pressure of the adding pipeline 2 exceeds the set value, so as to ensure that the system pressure remains within a safe range, which is conducive to the smooth flow of the pipeline and the smooth operation of the diaphragm pump. After the pressure is released, the excess gas and liquid will flow back to the medicine storage tank 1 through the pressure relief pipeline 5 to avoid waste of liquid medicine and discharge pollution. In addition, the diaphragm pressure gauge 2 9 can detect the pressure released from the adding pipeline 2 to the pressure relief pipeline 5 in real time during the drug addition process, so that the PLC control system can adjust and optimize the metering pump according to the comprehensive data of the pipeline pressure and historical data.

[0022] In this embodiment, the flow rate is calculated by measuring the pressure change of the liquid in the calibration column through the flow calibration column 3, and compared with the reading of the diaphragm metering pump 4, so as to determine the error and calibration coefficient of the metering pump. At the same time, with the multiple coordination of the diaphragm pressure gauge 1 7 and the diaphragm pressure gauge 2 9, it is possible to perform a dual-channel measurement of the liquid pressure in the dosing pipeline 2, and the PLC control center can determine the unit dosage, total dosage and dosage time of the liquid through the interaction and analysis of various data. At the same time, the back pressure valve 10 is used to ensure that the pressure of the system on the discharge side is maintained at a certain level, so as to correctly check the pressure in the metering pump.

[0023] An injection head 8 is also provided at the end of the dosing pipeline 2, through which sodium hypochlorite disinfectant can be added to the tap water source. The injection head 8 can be in the form of a sprinkler head or a multi-joint structure; a sampling valve 15 is provided on the dosing pipeline 2 through a three-way connection, and the sampling valve 15 is located on the middle pipeline between the diaphragm pressure gauge 7 and the float flowmeter 6. The sampling valve 15 can be set in the process of adding the liquid medicine, by slightly opening the sampling valve 15 and extracting a small amount of liquid medicine from the dosing pipeline 2 for sampling and testing, so as to ensure the specifications and medicinal properties of the liquid medicine.

[0024] Furthermore, a second drain valve 14 is provided on the other side of the bottom of the medicine storage tank 1. When the inside of the medicine storage tank 1 is cleaned, the second drain valve 14 can be opened to discharge the cleaning waste liquid.

[0025] In summary, in an automatic dosing device according to the present embodiment, when it is necessary to disinfect raw tap water, the PLC control center can collect the water quality parameters and water volume of the raw tap water through sensors and analyze and calculate the dosage, dosage time and dosage frequency of sodium hypochlorite. At the same time, the diaphragm metering pump 4 can extract the liquid medicine in the medicine storage tank 1 through the dosing pipeline 2 and transport it to the tap water dosing point. In this process, through multi-node detection of the flow calibration column 3, the float flowmeter 6, the diaphragm pressure gauge 1 7 and the diaphragm pressure gauge 2 8, the PLC control center can analyze and integrate the data through data interaction, coordinate the operating status and parameters of each device, and improve the overall efficiency and water treatment effect.

[0026] Although the present invention has been described above with reference to the embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the various features in the embodiments disclosed in the present invention may be used in combination with each other in any manner, and the fact that these combinations are not exhaustively described in this specification is only for the sake of omitting space and saving resources. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. An automatic dosing device, characterized in that: The invention comprises a medicine storage tank (1), wherein one side of the bottom of the medicine storage tank (1) is connected to a dosing pipeline (2), and the end of the dosing pipeline (2) is connected to a tap water dosing point, and a flow calibration column (3) and a diaphragm metering pump (4) are arranged on the dosing pipeline (2), and the flow calibration column (3) is located in the direction of the liquid inlet end of the diaphragm metering pump (4), and a pressure relief pipeline (5) is connected to the dosing pipeline (2) and is located in the direction of the liquid outlet end of the diaphragm metering pump (4) through a tee, and the end of the pressure relief pipeline (5) is connected to the medicine storage tank (1), and a float flowmeter (6) and a diaphragm pressure gauge (7) are arranged in sequence on the dosing pipeline (2) and is located in the direction of the liquid outlet end of the diaphragm metering pump (4); Among them, the automatic dosing device also includes a PLC control center, which is the master control terminal of the dosing system. The PLC control center collects water quality parameters and water volume of tap water through sensors, and automatically adjusts the dosage and addition time of sodium hypochlorite.

2. An automatic dosing device according to claim 1, characterized in that: A Y-type filter (12) and a drain valve (13) are also provided on the dosing pipeline (2) and in the middle section between the medicine storage tank (1) and the flow calibration column (3), and the drain valve (13) is close to the flow calibration column (3).

3. The automatic dosing device according to claim 1, characterized in that: The pressure relief pipeline (5) is provided with a pressure relief valve (11) and a second diaphragm pressure gauge (9), respectively, and the second diaphragm pressure gauge (9) is close to the connection portion between the pressure relief pipeline (5) and the injection pipeline (2).

4. The automatic dosing device according to claim 1, characterized in that: An injection head (8) is also provided at the end of the dosing pipeline (2).

5. The automatic dosing device according to claim 1, characterized in that: The dosing pipeline (2) is provided with a sampling valve (15) via a three-way connection, and the sampling valve (15) is located on the intermediate pipeline between the diaphragm pressure gauge (7) and the float flowmeter (6).

6. The automatic dosing device according to claim 1, characterized in that: A second sewage valve (14) is also provided on the other side of the bottom of the medicine storage tank (1).

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