CN212321500U - Automatic cleaning device for pH meter on-line measurement - Google Patents
Automatic cleaning device for pH meter on-line measurement Download PDFInfo
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- CN212321500U CN212321500U CN201922354744.4U CN201922354744U CN212321500U CN 212321500 U CN212321500 U CN 212321500U CN 201922354744 U CN201922354744 U CN 201922354744U CN 212321500 U CN212321500 U CN 212321500U
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Abstract
The utility model discloses an automatic cleaning device for online measurement of a pH meter, which comprises a cleaning pipeline connected with a cleaning water source, wherein the pH meter is arranged in a protective sleeve of the automatic cleaning device, and the protective sleeve of the pH meter is provided with an inlet and an outlet; the device is characterized in that the inlet is connected with a cleaning pipeline, and an inlet valve is arranged on the cleaning pipeline in front of the inlet; the outlet is connected with different collecting devices in parallel through pipelines, and outlet valves are respectively arranged on the parallel pipelines; a cleaning water source outlet valve is arranged in a pipeline for connecting the cleaning water source with the cleaning pipeline; the measuring liquid connecting pipeline is connected between the cleaning water source outlet valve and the inlet valve, and a valve is arranged on the measuring liquid connecting pipeline. All valve switches of the device are controlled by the DCS. The device provided by the utility model simple structure, self-cleaning, convenient operation, reduction block up, control are stable, provide effectual guarantee to the long-time on-line measuring of maintaining the pH meter.
Description
Technical Field
The utility model relates to an automatic cleaning device for pH meter on-line measuring.
Background
The pH meter is a common instrument and equipment and is mainly used for precisely measuring the pH value of a liquid medium, and is widely applied to the fields of environmental protection, sewage treatment, scientific research, pharmacy, chemical industry and the like.
When a pH meter is used for measuring the pH value of a solution, the most important work for ensuring the measurement accuracy, sensitivity and stability of the pH meter is to keep the electric contact part of an electrode and the solution clean. However, the contamination of the electrodes is a problem which is difficult to avoid because the solution to be measured may contain substances causing the contamination of the electrodes, such as suspensions, gels, microorganisms, oils, chemical agents, calcium salts, and crystalline substances which are liable to form scale. In order to guarantee that the pH meter can be continuously used for a long time, the polluted electrode is prevented from being inaccurate in measuring the pH value of water, the control of water quality neutralizers is further influenced, and the electrode system is necessary to be automatically cleaned.
In the field, the current normal solution is to take the pH meter out of the production equipment periodically, and clean the pH meter thoroughly after detaching the detection electrode, which not only affects the stability and fluency of the process operation, but also damages the electrode and the electrode lead easily, and increases the maintenance cost and labor intensity. Related personnel also use the pH measurement system box matched with the production device for detection, but the use cost is relatively high, and the selection space is relatively small.
Therefore, how to provide an automatic cleaning device for online measurement of a pH meter, which can be automatically cleaned in time, is a problem to be solved in the art.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an automatic cleaning device for pH meter, can on-line measuring and washing. In order to achieve the above object, the utility model adopts the following technical scheme:
an automatic cleaning device for a pH meter comprises a cleaning pipeline connected with a cleaning water source, wherein the pH meter is arranged in a protective sleeve of the automatic cleaning device, and the protective sleeve of the pH meter is provided with an inlet and an outlet; the device is characterized in that the inlet is connected with a cleaning pipeline, and an inlet valve is arranged on the cleaning pipeline in front of the inlet; the outlet is connected with different collecting devices in parallel through pipelines, and outlet valves are respectively arranged on the parallel pipelines; a cleaning water source outlet valve is arranged in a pipeline for connecting the cleaning water source with the cleaning pipeline; the measuring liquid connecting pipeline is connected between the washing water source outlet valve and the inlet valve, and a valve is arranged on the measuring liquid connecting pipeline; the cleaning control device comprises a DCS control system, and the valves on the inlet valve, the outlet valve, the cleaning water source outlet valve and the measuring liquid connecting pipeline are controlled by the DCS control system.
The valve can adopt an electric valve, a pneumatic valve or an electromagnetic valve. As the preferred technical scheme, the inlet valve, the outlet valve, the cleaning water source outlet valve and the valves on the measuring liquid connecting pipeline adopt pneumatic valves.
As a preferable technical scheme, the pneumatic valve adopts a pneumatic ball valve.
As a preferred technical scheme, a control panel is arranged in the DCS control system, and a DCS control state lamp, a valve state lamp, an operation switch, a manual cleaning switch and a maintenance switch are arranged on the control panel.
The utility model discloses following beneficial effect has:
(1) simple structure and low cost.
(2) The electrode system can be automatically cleaned, so that the service life of the pH meter is prolonged.
(3) The washing water can be recovered, and the recovered washing water can be used as washing water of the alkaline washing tower, for example, as measured by a pH meter of the alkaline washing tower, so that no excessive waste water is generated.
(4) The instrument can realize intermittent detection, greatly prolongs the service life of the electrode, and ensures the measurement accuracy, sensitivity and stability of the pH meter.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without inventive exercise.
Fig. 1 is a schematic structural diagram of an embodiment of the present invention, wherein "→" indicates a flow direction of the liquid.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it should be understood that the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, a pH meter applied to a caustic tower to measure the pH of the caustic solution is taken as an example. The alkaline tower 1 and the alkaline tower 2 are respectively connected to a cleaning pipeline 12 between a valve 7 and a valve 8 through a measuring liquid connecting pipeline controlled by the valve 5 and a valve 6. One end of a cleaning pipeline 12 controls the inflow of a cleaning water source through a cleaning water source outlet valve 7, the other end of the pipeline 12 is connected with an inlet of a pH meter protective sleeve, and a valve 8 is arranged in front of the inlet. The cleaning water source flows out through a pipeline provided with a cleaning water source outlet valve 7 and flows through a valve 8 and a pH meter protective sleeve 9 in front of the inlet of the pH meter protective sleeve. The outlet of the pH meter protective sleeve 9 is connected with a waste lye collecting tank 3 and a cleaning water collecting tank 4 through a parallel pipeline controlled by a valve 10 and a valve 11 so as to respectively recover cleaning water and measuring liquid.
The pH meter protective sleeve can adopt a pneumatic telescopic sheath, so that the pH meter is always in liquid, and the pneumatic telescopic sheath can be controlled by a DCS control system to be telescopic. The parallel pipeline of the valve 11 to the collecting and cleaning water tank 4 can adopt a PVC pipe. The valves 5, 6, 7, 8, 10 and 11 are pneumatic ball valves and are controlled by a DCS control system.
The instrument adopts intermittent on-line detection, and the on-line detection and the intermittent on-line cleaning are carried out. In use, before the pH value of a substance is to be detected, the outlet valve 7 of a cleaning water source is opened, the inlet valve 8 of the protective sleeve of the pH meter is opened, the drainage outlet valve 11 of the pH meter is opened, cleaning water flows through the pH meter, and the pH value of the cleaning water is tested until the pH value is stably neutral. And then closing the cleaning water source outlet valve 7, closing the pH meter drainage outlet valve 11, opening the pH meter drainage outlet valve 10, opening the valve 5 or the valve 6 of the alkaline tower measuring liquid connecting pipeline, enabling the substance to be detected to flow into the pipeline, detecting the pH value of the substance through the pH meter, and then flowing to the waste alkali collecting tank 3. And (4) the numerical value is stable, after the test is finished, the valve of the measuring liquid connecting pipeline is closed, the valve 10 is closed, the cleaning water source outlet valve 7 is opened, the valve 11 is opened, and the device is cleaned. After the cleaning is finished, the cleaning water source outlet valve 7 is closed, the pH meter protective sleeve inlet valve 8 is closed, the valve 11 is closed, and the equipment is recovered to the closed state.
The automatic cleaning device provided by the embodiment has the advantages of simple structure, automatic cleaning, convenience in operation, reduction of blockage, stability in control and capability of providing effective guarantee for long-time online measurement of the maintenance of the pH meter.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the scope of the invention. Any person skilled in the art can make some modifications without departing from the scope of the invention, i.e. all equivalent modifications made according to the invention are intended to be covered by the scope of the invention.
Claims (4)
1. An automatic cleaning device for online measurement of a pH meter comprises a cleaning pipeline connected with a cleaning water source, wherein the pH meter is arranged in a protective sleeve of the automatic cleaning device, and the protective sleeve of the pH meter is provided with an inlet and an outlet; the device is characterized in that the inlet is connected with a cleaning pipeline, and an inlet valve is arranged on the cleaning pipeline in front of the inlet; the outlet is connected with different collecting devices in parallel through pipelines, and outlet valves are respectively arranged on the parallel pipelines; a cleaning water source outlet valve is arranged in a pipeline for connecting the cleaning water source with the cleaning pipeline; the measuring liquid connecting pipeline is connected between the washing water source outlet valve and the inlet valve, and a valve is arranged on the measuring liquid connecting pipeline; the automatic cleaning device comprises a DCS control system, and the valves on the inlet valve, the outlet valve, the cleaning water source outlet valve and the measuring liquid connecting pipeline are controlled by the DCS control system.
2. The automatic cleaning device for the online measurement of the pH meter according to claim 1, wherein the inlet valve, the outlet valve, the cleaning water source outlet valve and the valves on the measuring liquid connecting pipeline are pneumatic valves.
3. The automatic cleaning device for the online measurement of the pH meter according to claim 2, wherein the pneumatic valve is a pneumatic ball valve.
4. The automatic washing device for the online measurement of the pH meter according to claim 1, wherein the collecting device is a collecting tank, and the different collecting devices comprise a washing water collecting device and a measuring liquid collecting device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354744.4U CN212321500U (en) | 2019-12-25 | 2019-12-25 | Automatic cleaning device for pH meter on-line measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922354744.4U CN212321500U (en) | 2019-12-25 | 2019-12-25 | Automatic cleaning device for pH meter on-line measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212321500U true CN212321500U (en) | 2021-01-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922354744.4U Active CN212321500U (en) | 2019-12-25 | 2019-12-25 | Automatic cleaning device for pH meter on-line measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212321500U (en) |
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2019
- 2019-12-25 CN CN201922354744.4U patent/CN212321500U/en active Active
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