A liquid medicine pH sampling and detection device

Abstract

The present invention discloses a liquid medicine pH sampling and detection device. Two connecting pipes are connected to the bottom surface of the sampling container. One connecting pipe is connected to the circulation pump pipeline of the liquid medicine tank body, and the other connecting pipe is connected to a valve port of a gas-controlled three-way valve. The other two valve ports of the gas-controlled three-way valve are respectively connected to a discharge pipe and an overflow pipe, and the overflow pipe is connected to the sampling container; the gas-controlled valve is connected to the connecting pipe between the sampling container and the circulation pump pipeline, the overflow detection switch is connected to the overflow pipe, the cleaning pure water pipe and the pH electrode are plugged into the sampling container, and the air outlet end of the CDA air compressor is connected to the sampling container. The present invention can extend the service life of the measuring sensor, reduce the spare parts cost of the sensor, and reduce the maintenance downtime. The sensor of the device can be other various detection sensors, such as conductivity detection sensors, various ion selective electrodes, etc.

Description

Technical field:

[0002] The invention relates to a device for sampling and detecting pH value of a medicinal liquid. Background technology:

[0004] In the wet process of semiconductor, LCD, food, biopharmaceutical and other industries, it is usually necessary to collect the pH value of the liquid medicine, which generally has a high temperature, contains other complex components or contains hydrofluoric acid, etc. The current common practice is to directly install the pH sensor on the liquid medicine tank to measure the pH value of the liquid medicine. This method greatly shortens the life of the pH sensor, thereby increasing maintenance costs and unnecessary downtime. Summary of the invention:

[0006] The present invention provides a device for sampling and detecting pH of a liquid medicine in order to solve the problems existing in the prior art.

[0007] The technical solutions adopted in the present invention are:

[0008] A device for sampling and detecting pH of a medicinal liquid. The device is connected to a circulating pump pipeline in a medicinal liquid tank body, and comprises an air-controlled valve, a cleaning pure water pipe, a pH electrode, a CDA air compressor, a sampling container, an overflow detection switch, an air-controlled three-way valve, a discharge pipe, a connecting pipe and an overflow pipe. Two connecting pipes are connected to the bottom surface of the sampling container, one connecting pipe is connected to the circulating pump pipeline of the medicinal liquid tank body, and the other connecting pipe is correspondingly connected to a valve port of the air-controlled three-way valve. The other two valve ports of the air-controlled three-way valve are respectively connected to the discharge pipe and the overflow pipe, and the overflow pipe is connected to the sampling container; the air-controlled valve is connected to the connecting pipe between the sampling container and the circulating pump pipeline, the overflow detection switch is connected to the overflow pipe, the cleaning pure water pipe and the pH electrode are plugged into the sampling container, and the air outlet end of the CDA air compressor is connected to the sampling container.

[0009] Furthermore, the air outlet end of the CDA air compressor is located above the liquid inlet in the overflow pipe.

[0010] Furthermore, the liquid outlet of the cleaning pure water pipe is located above the liquid inlet in the overflow pipe.

[0011] Furthermore, the bottom end of the pH electrode is located below the liquid inlet in the overflow pipe.

[0012] Furthermore, the sampling container includes a container body and a cover body, the container body and the cover body are threadedly connected, and the cover body is provided with a plug hole for plugging and installing a cleaning pure water pipe, a PH electrode and a CDA air compressor.

[0013] Furthermore, a sealing ring is provided between the cover body and the cleaning pure water pipe, the PH electrode and the CDA air compressor.

[0014] Furthermore, the overflow detection switch adopts a photoelectric overflow switch structure.

[0015] The present invention has the following beneficial effects:

[0016] The present invention can extend the service life of the measuring sensor, reduce the spare parts cost of the sensor, and reduce the maintenance downtime. The sensor of the device can be other various detection sensors, such as conductivity detection sensors, various ion selective electrodes, etc. Description of the drawings:

[0018] FIG1 is a structural diagram of the present invention. Specific implementation method:

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] like Figure 1 As shown, the present invention is a liquid medicine pH sampling and detection device, which is connected to the circulation pump pipeline 1 in the liquid medicine tank body 2, and includes an air-controlled valve 5, a cleaning pure water pipe 6, a pH electrode 7, a CDA air compressor 8, a sampling container 9, an overflow detection switch 10, an air-controlled three-way valve 11, a drain pipe 12, a connecting pipe 13 and an overflow pipe 14.

[0022] Two connecting pipes 13 are connected to the bottom surface of the sampling container 9, one connecting pipe 13 is connected to the circulation pump pipeline 1 of the medicine liquid tank body, and the other connecting pipe 13 is connected to a valve port of the air-controlled three-way valve 11, and the other two valve ports of the air-controlled three-way valve 11 are respectively connected to the drain pipe 12 and the overflow pipe 14, and the overflow pipe 14 is connected to the sampling container 9.

[0023] The air control valve 5 is connected to the connecting pipe 13 between the sampling container 9 and the circulation pump pipeline 1, the overflow detection switch 10 is connected to the overflow pipe 14, the cleaning pure water pipe 6 and the pH electrode 7 are inserted into the sampling container 9, and the air outlet end of the CDA air compressor 8 is connected to the sampling container 9.

[0024] In the present invention, the air outlet of the CDA air compressor 8 is located above the liquid inlet in the overflow pipe 14, the liquid outlet of the cleaning pure water pipe 6 is located above the liquid inlet in the overflow pipe 14, and the bottom end of the pH electrode 7 is located below the liquid inlet in the overflow pipe 14.

[0025] The sampling container 9 in the present invention comprises a container body and a cover body, the container body and the cover body are threadedly connected, and a plug hole for plugging and installing a cleaning pure water pipe 6, a PH electrode 7 and an air outlet of a CDA air compressor 8 is provided on the cover body.

[0026] To ensure the sealing performance, a sealing ring is provided between the cover body and the cleaning pure water pipe 6, the PH electrode 7 and the air outlet of the CDA air compressor 8.

[0027] The overflow detection switch 10 in the present invention adopts a photoelectric overflow switch structure.

[0028] The present invention installs the device of the present invention on the pipeline of the medicine liquid circulation pump. Since the pH of the medicine liquid cannot change suddenly in a short time, the device can be used to perform periodic measurement according to the required measurement cycle. Generally, the measurement cycle required is 15-20 minutes.

[0029] The sampling, measuring and cleaning process of the device of the present invention:

[0030] The air-controlled valve 5 and the air-controlled three-way valve 11 are opened. At this time, the medicinal liquid enters the container from the bottom of the sampling container 9, and then flows out from the drain pipe 12 through the A and C paths of the air-controlled three-way valve 11. After a small period of time of about 10 seconds, the medicinal liquid in the sampling pipeline is replaced. At this time, the air-controlled three-way valve 11 is closed, and the air-controlled valve 5 continues to be in the open state. As time goes by, the sampler 9 begins to overflow. When the overflow detection switch 10 stably detects the overflow, the air-controlled valve 5 is automatically closed. Then, after standing for about 5 seconds, the PH electrode 7 can read the PH value of the current medicinal liquid.

[0031] When one measurement is completed, the cleaning process of the sampling container 9 begins, and the process is as follows:

[0032] The pneumatic three-way valve 11 is opened, and the liquid flow paths A and C are connected. At this time, CDA compressed air is introduced into the sampling container, and the liquid medicine in the sampling container 9 will be quickly discharged. After the liquid medicine is discharged, the pneumatic three-way valve 11 is closed, and the pure water in the pure water pipe 6 for cleaning begins to be injected into the sampling container 9. After the overflow detection switch 10 is activated, the pure water injection is stopped, and the pneumatic three-way valve 11 is opened. At the same time, CDA compressed air 8 enters the sampling container 9, and the water in the container will be quickly discharged, thus completing a cleaning process of the sampling container 9. The number of cleaning times can be set in the control system as needed.

[0033] The above description is only a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements without departing from the principle of the present invention, and these improvements should also be regarded as within the protection scope of the present invention.

Claims

1. A device for sampling and detecting pH of a liquid medicine, the device being connected to a circulating pump pipeline in a liquid medicine tank, characterized in that: The invention comprises an air-controlled valve (5), a cleaning pure water pipe (6), a pH electrode (7), a CDA air compressor (8), a sampling container (9), an overflow detection switch (10), an air-controlled three-way valve (11), a discharge pipe (12), a connecting pipe (13) and an overflow pipe (14), wherein two connecting pipes (13) are connected to the bottom surface of the sampling container (9), one connecting pipe (13) is connected to the circulation pump pipeline of the liquid medicine tank body, and the other connecting pipe (13) is connected to a valve port of the air-controlled three-way valve (11), and the other two valve ports of the air-controlled three-way valve (11) are respectively connected to the discharge pipe (12) and the overflow pipe (14), and the overflow pipe (14) is connected to the sampling container (9); The air control valve (5) is connected to the connecting pipe (13) between the sampling container (9) and the circulation pump pipeline, the overflow detection switch (10) is connected to the overflow pipe (14), the cleaning pure water pipe (6) and the pH electrode (7) are inserted into the sampling container (9), and the air outlet end of the CDA air compressor (8) is connected to the sampling container (9).

2. The liquid medicine pH sampling and detection device according to claim 1, characterized in that: The air outlet end of the CDA air compressor (8) is located above the liquid inlet in the overflow pipe (14).

3. The liquid medicine pH sampling and detection device according to claim 1, characterized in that: The liquid outlet of the cleaning pure water pipe (6) is located above the liquid inlet in the overflow pipe (14).

4. The liquid medicine pH sampling and detection device according to claim 1, characterized in that: The bottom end of the pH electrode (7) is located below the liquid inlet in the overflow pipe (14).

5. The liquid medicine pH sampling and detection device according to claim 1, characterized in that: The sampling container (9) comprises a container body and a cover body, the container body and the cover body are threadedly connected, and a plug hole for plugging and installing a cleaning pure water pipe (6), a pH electrode (7) and a CDA air compressor (8) is provided on the cover body.

6. The liquid medicine pH sampling and detection device according to claim 5, characterized in that: A sealing ring is provided between the cover body and the cleaning pure water pipe (6), the pH electrode (7) and the CDA air compressor (8).

7. The liquid medicine pH sampling and detection device according to claim 1, characterized in that: The overflow detection switch (10) adopts a photoelectric overflow switch structure.

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