PH meter flow cell capable of being automatically cleaned

Abstract

The utility model provides a pH meter flow cell capable of being automatically cleaned, which comprises an inlet stop valve (2) which is in fluid connection with an outlet of a to-be-measured medium storage device (14) through a first flow pipeline (1), the other end of the inlet stop valve (2) is in fluid connection with one side of the bottom of a measuring chamber (4) through a second flow pipeline (3), a pH meter probe (11) is inserted in the measuring chamber (4), and the pH meter probe (11) is connected with the inlet stop valve (2). The pH meter flow cell comprises a cleaning device, one end of the cleaning device is in fluid connection with the first flow pipeline (1), the other end of the cleaning device is arranged in the measuring cavity (4), and the cleaning device is used for spraying a medium to be measured to clean the pH meter probe (11).

Description

Technical Field

[0001] This utility model relates to a pH meter flow cell, and more particularly to a pH meter flow cell that can be automatically cleaned. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] pH meters are widely used in water quality monitoring, water treatment, and environmental monitoring. In water quality monitoring, they can monitor changes in the pH of water bodies in real time, providing a scientific basis for water quality management. In water treatment, they help companies adjust treatment processes in a timely manner to ensure that wastewater discharge meets environmental standards. In environmental monitoring, they provide data support to environmental protection departments, enabling the timely detection and handling of water pollution problems.

[0004] In existing pH meters, the flow cell is an indispensable device during measurement. Most flow cells used in factories are of the drainage type. Because the medium being measured produces scale and hydrolysates within the flow cell, pH measurements can be inaccurate. Therefore, regular cleaning of the flow cell and probe cleaning is necessary. However, frequent disassembly of the probe can damage the probe and its mounting threads, rendering the probe unusable.

[0005] If a forced cleaning device is added to the flow cell, the flow cell can be cleaned and backwashed with high-pressure cleaning equipment without disassembling the probe, thus avoiding damage to the probe, extending the service life of the equipment, and reducing the frequency of instrument maintenance.

[0006] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0007] Purpose of the invention: The technical problem to be solved by this invention is to provide a pH meter flow cell that can be automatically cleaned, addressing the shortcomings of existing technologies.

[0008] To address the aforementioned technical problems, this utility model discloses an automatically cleanable pH meter flow cell, comprising an inlet shut-off valve fluidly connected to the outlet of a storage device for the medium to be measured via a first flow pipeline, the other end of which is fluidly connected to one side of the bottom of a measuring chamber via a second flow pipeline, wherein a pH meter probe is inserted into the measuring chamber, and the pH meter flow cell includes:

[0009] A cleaning device with one end connected to the first flow pipeline in fluid, and the other end of the cleaning device disposed in the measuring chamber, is used to spray out the medium to be measured to clean the pH meter probe.

[0010] Furthermore, the cleaning device includes:

[0011] A backflushing line, one end of which is fluidly connected to the first flow line, and the other end of which is located in the measuring chamber.

[0012] Furthermore, the backflushing pipeline is located at one end of the measuring chamber, and has a backflushing port in the direction of the pH meter probe.

[0013] Furthermore, one end of the backflushing line is located in the measuring chamber and is fluidly connected to the annular line;

[0014] The loop is arranged around the pH meter probe;

[0015] The backflushing port is located on the annular pipeline.

[0016] Furthermore, a backwash booster pump is sequentially installed on the backwash pipeline to increase the pressure of the medium to be tested in the backwash pipeline.

[0017] Furthermore, on the backwash pipeline, a backwash booster pump is provided with a front shut-off valve and a rear shut-off valve, respectively, before and after the backwash booster pump.

[0018] Furthermore, a third flow line is provided on the bottom side of the measuring chamber away from the second flow line, for discharging the medium to be measured from the measuring chamber.

[0019] Furthermore, a discharge port shut-off valve is provided at the other end of the third flow pipeline.

[0020] Furthermore, the discharge port shut-off valve is fluidly connected to the return tank via a pipeline, and the return tank is fluidly connected to the return port of the test medium storage device via a pipeline.

[0021] Furthermore, both the annular pipeline and the backflushing pipeline are made of Ф8 stainless steel.

[0022] Beneficial effects:

[0023] 1. This utility model can periodically backwash the probe, reducing the pH meter failure rate and maintenance frequency.

[0024] 2. When the probe is contaminated or contains impurities, this invention allows for rinsing without disassembling the pH meter probe, avoiding frequent disassembly and reassembly that could damage the probe and extending its service life. Attached Figure Description

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0026] Figure 1 This is a schematic diagram of the overall structure of the flow cell.

[0027] Figure 2 This is a top view of the backwash nozzles inside the flow tank cavity.

[0028] In the diagram, 1 is the first flow pipeline, 2 is the inlet shut-off valve, 3 is the second flow pipeline, 4 is the flow tank measurement chamber, 5 is the third flow pipeline, 6 is the discharge shut-off valve, 7 is the shut-off valve after the backwash booster pump, 8 is the backwash booster pump, 9 is the shut-off valve before the backwash booster pump, 10 is the backwash pipeline, 11 is the pH meter probe, 12 is the backwash port, 13 is the reflux tank, and 14 is the storage device for the medium to be tested. Detailed Implementation

[0029] The present invention adopts the following technical solution:

[0030] like Figure 1 As shown, the flow cell includes an inlet shut-off valve 2 for controlling the flow of the medium, flow lines 1 / 3 / 5 for allowing the medium to flow normally to the measuring chamber 4, the measuring chamber 4 for installing the pH meter probe 11, a backflushing port 12 for cleaning the flow cell and the pH meter probe, a backflushing booster pump 8 for cleaning, and an outlet shut-off valve 6 for discharging the medium. When the pH meter is not in use, it is essential to ensure that the measuring chamber 4 of the probe 11 is filled with the medium, and that the probe 11 is immersed in the medium being measured.

[0031] The device for storing the medium to be tested is fluidly connected to the inlet shut-off valve 2 through the first flow line 1. The shut-off valve 2 is connected to one end of the second flow line 2 by means of a compression fitting. The second flow line 2 is made of Ф18 304 stainless steel. The other end of the second flow line 2 is welded to the inlet of the measuring chamber 4.

[0032] The outlet of measuring chamber 4 is still welded to the third flow line 5, which is still made of Ф18 304 stainless steel.

[0033] The other end of the third flow pipeline 5 is connected to the outlet shut-off valve 6 using a compression fitting connection.

[0034] The other end of the shut-off valve 6 is connected to the discharge pipe, which leads the medium into the return tank and returns the medium to the equipment storing the medium to be tested through the pipeline.

[0035] The pH meter probe 11 can be inserted into the middle of the measuring chamber 4. It is connected by a 3 / 4 NPT thread. There is a certain space between the probe 11 and the chamber 4, which allows the measured medium to evenly wrap around the pH meter probe 11, so that the measurement can be accurate.

[0036] On the side of the measuring chamber 4, make a small hole with a diameter of Ф8. Lead out a Ф8 stainless steel pipe from the small hole as the backwash line 10.

[0037] After the backwash line 10 is connected in sequence to the backwash booster pump downstream shut-off valve 7, the 24VDC backwash booster pump 8, and the backwash booster pump upstream shut-off valve 9, it is connected to the flow line 1.

[0038] like Figure 2 As shown, a Ф8 stainless steel pipe is welded around the inside of the measuring chamber 4 of the flow pool, and connected to the shut-off valve 7 of the backwash booster pump through the backwash pipeline 10. When welding the stainless steel pipe, it is necessary to ensure a smooth weld without any dead corners. Six holes are opened around the pipe as backwash ports for backwashing.

[0039] The first circulation pipeline 1, the second circulation pipeline 3, and the third circulation pipeline 5 are all circulation pipelines made of Ф18 stainless steel.

[0040] Before being put into use, the first flow line 1 is connected to the test medium line to form a bypass, which can introduce the test medium into the flow cell measurement chamber 4. The pH meter probe 11 can then accurately measure the pH value. At the same time, it is ensured that all components are properly connected to prevent leakage.

[0041] The measurement process is as follows:

[0042] With the inlet shut-off valve 2 open, the medium can enter the flow tank measuring chamber 4 through the flow pipeline 1, shut-off valve 2, and flow pipeline 3. Once the measuring chamber is filled with the flowing medium, the pH meter probe 11 can accurately measure the pH value of the medium. To ensure that the measured pH value is fresh and stable, the outlet shut-off valve 6 must be opened, allowing the medium to be discharged into the return tank through the return pipeline 5 and outlet shut-off valve 6. The medium in the return tank will return to the product water device, thus ensuring that the measured medium is circulating.

[0043] If impurities are present at the pH meter probe, the following procedure should be followed:

[0044] Close the inlet shut-off valve 2, open the shut-off valve 9 before the backwash booster pump and the shut-off valve 7 after the backwash booster pump, and then turn on the backwash booster pump 8. The backwash booster pump 8 can bring the measured medium from the inlet shut-off valve 2 through the backwash pipeline 10 to the pH meter probe 11. Since the flushing water is pressurized, the pressurized flushing water can be used to clean the pH meter probe 11 through the 6 flushing ports 12 in the chamber 4. The cleaned pH meter probe 11 can then be used again.

[0045] This invention provides a concept and method for an automatically cleanable pH meter flow cell. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A pH meter flow cell capable of automatic cleaning, comprising an inlet shut-off valve (2) fluidly connected to the outlet of a storage device (14) for the medium to be measured via a first flow line (1), the other end of the inlet shut-off valve (2) being fluidly connected to one side of the bottom of a measuring chamber (4) via a second flow line (3), wherein a pH meter probe (11) is inserted in the measuring chamber (4), characterized in that, include: A cleaning device with one end fluidly connected to the first flow line (1), and the other end of the cleaning device is set in the measuring chamber (4) for spraying out the medium to be measured to clean the pH meter probe (11).

2. The pH meter flow cell with automatic cleaning capability according to claim 1, characterized in that, The cleaning device includes: A backwash line (10) is provided, one end of which is fluidly connected to the first flow line (1), and the other end is located in the measuring chamber (4).

3. The pH meter flow cell with automatic cleaning capability according to claim 2, characterized in that, The backwash line (10) is located at one end in the measuring chamber (4), and has a backwash port (12) in the direction of the pH meter probe (11).

4. The pH meter flow cell with automatic cleaning capability according to claim 3, characterized in that, The backwash line (10) is located at one end in the measuring chamber (4) and is fluidly connected to the annular line; The annular tubing is arranged around the pH meter probe (11); The backflushing port (12) is located on the annular pipeline.

5. The pH meter flow cell with automatic cleaning capability according to claim 2, characterized in that, A backwash booster pump (8) is sequentially installed on the backwash pipeline (10) to increase the pressure of the medium to be tested in the backwash pipeline (10).

6. The pH meter flow cell with automatic cleaning capability according to claim 5, characterized in that, On the backwash pipeline (10), a backwash booster pump (8) is provided with a front shut-off valve (9) and a backwash booster pump (7) before and after it, respectively.

7. The pH meter flow cell with automatic cleaning capability according to claim 1, characterized in that, The bottom of the measuring chamber (4) is away from the second flow line (3) and a third flow line (5) is provided on the other side for discharging the medium to be measured in the measuring chamber (4).

8. The pH meter flow cell with automatic cleaning capability according to claim 7, characterized in that, The other end of the third flow pipeline (5) is equipped with a discharge port shut-off valve (6).

9. A pH meter flow cell with automatic cleaning capability according to claim 8, characterized in that, The discharge port shut-off valve (6) is fluidly connected to the return tank (13) via a pipeline, and the return tank (13) is fluidly connected to the return port of the test medium storage device (14) via a pipeline.

10. A pH meter flow cell capable of automatic cleaning according to claim 4, characterized in that, Both the annular pipeline and the backwash pipeline (10) are stainless steel pipelines with a diameter of Ф8.

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