CN217057159U - Automatic water sample switching device - Google Patents

Abstract

The utility model discloses an automatic switching device for water samples, comprising a flow monitoring system, a temperature monitoring and control system, a chemical instrument, a calculation and analysis system, a control system and several water inlet pipes; each water inlet pipe is provided with a valve, and each water inlet pipe is provided with valves. The outlet of the flow monitoring system is connected with the inlet of the flow monitoring system after being paralleled by pipes. The outlet of the flow monitoring system is connected with the inlet of the temperature monitoring and control system, and the outlet of the temperature monitoring and control system is connected with the inlet of the chemical instrument. The output of the flow monitoring system The end is connected with the input end of the control system, the output end of the chemical instrument is connected with the input end of the calculation and analysis system, the output end of the calculation and analysis system is connected with the input end of the control system, and the output end of the control system is connected with the control end of the valve The device can realize automatic switching of different water samples, realize continuous measurement of different water samples, and the measurement accuracy is high.

Description

An automatic water sample switching device

technical field

The utility model belongs to the field of water quality monitoring of power generation technology, and relates to an automatic water sample switching device.

Background technique

Inaccurate chemical supervision of the water vapor system of thermal power plants will lead to the failure to detect the deterioration of water vapor quality in time, the deviation of chemical control, and the occurrence of corrosion, scaling and salt accumulation in the water vapor system of the generator set, resulting in huge economic losses. Therefore, it is necessary to carry out online monitoring of each water sample through the chemical instrument, and ensure that the online chemical instrument measurement is accurate, control its measured value within the qualified range, and effectively prevent the corrosion, scaling and salt accumulation of thermal equipment.

At present, there are the following problems in the online monitoring of each water sample by chemical instruments:

1) When measuring different water samples with chemical instruments, it is necessary to manually replace the sampling tube, which is cumbersome and cannot be measured continuously.

2) When measuring water samples by chemical instruments, the flow rate of water samples is mainly controlled by manually adjusting the valve size, which is cumbersome to operate, and the flow rate of water samples also changes with load fluctuations, which affects the accuracy of chemical instrument measurements.

3) When the water sample is measured by the chemical instrument, the temperature control is not accurate, and the temperature variation range is large, which affects the measurement accuracy of the chemical instrument.

Utility model content

The purpose of the present utility model is to overcome the shortcomings of the above-mentioned prior art, and to provide a water sample automatic switching device, which can realize the automatic switching of different water samples, realize the continuous measurement of different water samples, and the accuracy of the measurement. higher.

In order to achieve the above purpose, the water sample automatic switching device of the present invention includes a flow monitoring system, a temperature monitoring and control system, a chemical instrument, a calculation and analysis system, a control system and a number of water inlet pipes;

Each inlet pipe is provided with a valve, the outlet of each inlet pipe is connected with the inlet of the flow monitoring system after being paralleled by the pipeline, the outlet of the flow monitoring system is connected with the inlet of the temperature monitoring and control system, and the outlet of the temperature monitoring and control system is connected with The inlet of the chemical instrument is connected, the output end of the flow monitoring system is connected with the input end of the control system, the output end of the chemical instrument is connected with the input end of the calculation and analysis system, and the output end of the calculation and analysis system is connected with the input end of the control system. Connection, the output end of the control system is connected with the control end of the valve.

The temperature monitoring and control system includes a temperature detection device and a temperature adjustment device, wherein the outlet of the flow monitoring system is connected to the inlet of the chemical instrument through the temperature adjustment device and the temperature detection device in turn, and the temperature detection device and the temperature adjustment device are connected with the control system. .

The temperature adjustment device includes a heater and a cooler.

During operation, the control system controls the state of each valve, among which, only one valve is open, and the remaining valves are all closed.

When working, the control system controls the opening of the valve on the corresponding water inlet pipe according to the water sample flow signal detected by the flow monitoring system, so that the flow rate of the water sample entering the chemical instrument is within the flow measurement range of the chemical instrument.

When working, the control system detects the temperature of the water sample through the temperature detection device, and adjusts the temperature of the water sample through the temperature adjustment device according to the current temperature of the water sample, so that the temperature of the water sample entering the chemical instrument is within the temperature measurement range of the chemical instrument Inside.

The utility model has the following beneficial effects:

During the specific operation of the water sample automatic switching device of the utility model, when detecting the water sample in any water inlet pipe, the valve on the water inlet pipe is opened, the valves on the remaining water inlet pipes are closed, and the valves on the water inlet pipe are closed. The water sample is monitored by the flow monitoring system and the temperature monitoring and control system monitors and controls the water temperature and then enters the chemical instrument for measurement to adapt to the current chemical instrument. The chemical instrument sends the measurement data of the water sample to the calculation and analysis system. When the fluctuation range of the measured data of the sample within the preset time is within the preset range, the average value of the measured data of the water sample within the preset time is calculated, and then the calculated average value is used as the water sample in the water inlet pipe. The final measurement data is obtained to improve the accuracy of the measurement, and then the valve on the water inlet pipe is closed to detect the water sample in the next water inlet pipe, so as to realize the automatic switching of different water samples and realize the continuous measurement of different water samples. .

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

Among them, 1 is a flow monitoring system, 2 is a temperature monitoring and control system, 3 is a chemical instrument, 4 is a calculation and analysis system, 5 is a control system, and 6 is a valve.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in further detail:

Referring to FIG. 1, the water sample automatic switching device of the present invention includes a flow monitoring system 1, a temperature monitoring and control system 2, a chemical instrument 3, a calculation and analysis system 4, a control system 5 and a number of water inlet pipes; A valve 6 is provided, the outlet of each water inlet pipe is connected with the inlet of the flow monitoring system 1 after passing through the pipeline, the outlet of the flow monitoring system 1 and the inlet of the temperature monitoring and control system 2, and the outlet of the temperature monitoring and control system 2 and The inlet of the chemical meter 3 is connected, the output end of the flow monitoring system 1 is connected with the input end of the control system 5, the output end of the chemical meter 3 is connected with the input end of the calculation and analysis system 4, and the output end of the calculation and analysis system 4 is connected with the input end of the control system 5. The input end of the control system 5 is connected, and the output end of the control system 5 is connected with the control end of the valve 6 .

During the detection process, only one valve 6 is opened, the other valves 6 are all closed, and the opening of the valve 6 is controlled by the control system 5 .

The control system 5 automatically switches each valve 6 according to the output signal of the calculation and analysis system 4 .

The flow monitoring system 1 monitors the water sample flow signal, and sends the water sample flow signal to the control system 5. The control system 5 automatically adjusts the opening of the valve 6 according to the flow rate, so that the flow rate of the water entering the chemical meter 3 meets the chemical requirements. Meter 3 flow range.

The temperature monitoring and control system 2 includes a temperature detection device and a temperature adjustment device, wherein the outlet of the flow monitoring system 1 is communicated with the inlet of the chemical instrument 3 through the temperature adjustment device and the temperature detection device in turn, and the temperature detection device and the temperature adjustment device are connected with the control device. The system 5 is connected; the temperature adjustment device includes a heater and a cooler. During operation, the control system 5 detects the temperature of the water sample through the temperature detection device, and adjusts the temperature of the water sample through the temperature adjustment device according to the current temperature of the water sample. , so that the temperature of the water sample entering the chemical meter 3 is within the temperature measurement range of the chemical meter 3 .

The concrete working process of the present utility model is:

When detecting the water sample in any water inlet pipe, then open the valve 6 on the water inlet pipe, close the valve 6 on the remaining water inlet pipe, the water sample on the water inlet pipe is monitored by the flow monitoring system 1 for flow and temperature monitoring and control After the system 2 monitors and controls the water temperature, it enters the chemical meter 3 for measurement, and the chemical meter 3 sends the measurement data of the water sample to the calculation and analysis system 4. When the fluctuation range of the measurement data of the water sample within the preset time is within the preset value Within the range, the average value of the measurement data of the water sample within the preset time is calculated, and then the calculated average value is taken as the final measurement data of the water sample in the water inlet pipe and sent to the control system 5 to complete the water inlet. To measure the water sample in the pipeline, the control system 5 closes the valve 6 on the water inlet pipeline, opens the valve 6 on the next water inlet pipeline, and then measures the water sample on the next water inlet pipeline until all the water samples in the water inlet pipeline are completed. until measurement.

Claims (6)

1. The automatic water sample switching device is characterized by comprising a flow monitoring system (1), a temperature monitoring and controlling system (2), a chemical instrument (3), a calculation and analysis system (4), a control system (5) and a plurality of water inlet pipelines;

all be provided with valve (6) on each inlet pipe way, the export of each inlet pipe way is managed the back through the pipeline and is linked together with the entry of flow monitoring system (1), the export of flow monitoring system (1) and the entry of temperature monitoring and control system (2), the export of temperature monitoring and control system (2) is linked together with the entry of chemical instrumentation (3), the output of flow monitoring system (1) is connected with the input of control system (5), the output of chemical instrumentation (3) is connected with the input of computational analysis system (4), the output of computational analysis system (4) is connected with the input of control system (5), the output of control system (5) is connected with the control end of valve (6).

2. The automatic water sample switching device according to claim 1, wherein the temperature monitoring and controlling system (2) comprises a temperature detecting device and a temperature adjusting device, wherein the outlet of the flow monitoring system (1) is communicated with the inlet of the chemical instrument (3) through the temperature adjusting device and the temperature detecting device in sequence, and the temperature detecting device and the temperature adjusting device are connected with the controlling system (5).

3. The automatic water sample switching device according to claim 2, wherein the temperature regulating device comprises a heater and a cooler.

4. An automatic water sample switching device according to claim 1, wherein in use the control system (5) controls the state of each valve (6), wherein only one valve (6) is open and the remaining valves (6) are closed.

5. The automatic water sample switching device according to claim 1, wherein, in operation, the control system (5) controls the opening of the corresponding water inlet pipeline upper valve (6) according to the water sample flow signal detected by the flow monitoring system (1), so that the flow of the water sample entering the chemical meter (3) is within the flow measurement range of the chemical meter (3).

6. The automatic water sample switching device according to claim 5, wherein in operation, the control system (5) detects the temperature of the water sample through the temperature detection device and adjusts the temperature of the water sample through the temperature adjustment device according to the temperature of the current water sample, so that the temperature of the water sample entering the chemical meter (3) is within the temperature measurement range of the chemical meter (3).

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