PH value monitoring device

Abstract

The utility model belongs to the technical field of water quality analysis, and discloses a pH value monitoring device. The pH value monitoring device comprises a pH monitoring pipeline used for introducing wastewater to be detected, a pH meter is arranged on the pH monitoring pipeline and used for detecting the pH value of the wastewater in a pH monitoring branch, the pH value monitoring device further comprises a cleaning pipeline, one end of the cleaning pipeline is selectively communicated with the pH monitoring pipeline, and the other end of the cleaning pipeline is connected with an agent box. A cleaning agent with a known pH value is stored in the agent box, and the cleaning agent is used for cleaning the pH meter on the pH monitoring branch. After cleaning is finished, the pH meter measures the pH value of the cleaning agent and records the pH value as a measured value, and calibration of the pH meter is achieved by comparing the known value and the measured value of the cleaning agent. According to the device, the pH meter can be cleaned and calibrated at the same time only through the cleaning agent, a special calibration device does not need to be arranged, the monitoring efficiency is improved, and the monitoring cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to water quality analysis technical field especially relates to a pH value monitoring device. BACKGROUND

[0002] At present, the pH meter in the device for monitoring the pH value of the wastewater discharged by the electroplating industrial park needs to be cleaned or replaced after being used for a period of time, and after the cleaning of the pH meter is completed, it also needs to be calibrated to ensure the accuracy of the pH meter measurement. But the existing pH value monitoring device usually sets a calibration device on the monitoring pipeline for calibrating the pH meter. After the cleaning device finishes cleaning the pH meter, it is calibrated through the calibration device. This scheme not only increases the design cost of the pH value monitoring device, but also has low cleaning and calibration efficiency, and also makes the pH value monitoring device large in size, which is not conducive to its installation on the wastewater discharge pipeline. SUMMARY

[0003] The utility model aims at providing a kind of pH value monitoring device, without setting separate pH meter calibration device, reduce the volume of pH value monitoring device, improve monitoring efficiency, reduce monitoring cost.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] A kind of pH value monitoring device, comprising:

[0006] pH monitoring pipeline, the pH monitoring pipeline is used to import wastewater to be measured;

[0007] pH meter, the pH meter is located in the pH monitoring pipeline;

[0008] cleaning pipeline, one end of the cleaning pipeline is selectively communicated with the pH monitoring pipeline;

[0009] medicament tank, the medicament tank is communicated with the other end of the cleaning pipeline, the medicament tank stores cleaning medicament with known pH value, and the cleaning medicament is used to clean the pH meter.

[0010] Optionally, the pH monitoring pipeline includes at least two pH monitoring branches, the pH meter is arranged on each pH monitoring branch, and at least two pH monitoring branches work alternately, and the pH monitoring branch in non-working state is communicated with the cleaning pipeline.

[0011] Optionally, the pH value monitoring device includes at least two pH monitoring branches, at least two pH monitoring branches work alternately, and the pH monitoring branch in non-working state is communicated with the cleaning pipeline.

[0012] Optionally, the pH value monitoring device further comprises a water inlet pipeline and a water outlet pipeline, and at least two of the pH monitoring branches are arranged in parallel, the water inlet ends of the pH monitoring branches are communicated with the water inlet pipeline, and the water outlet ends of the pH monitoring branches are communicated with the water outlet pipeline.

[0013] Optionally, the switch valve is an electromagnetic valve.

[0014] Optionally, a water trap is further arranged on each of the pH monitoring branches, and the water trap is arranged between the pH meter and the water outlet end of the pH monitoring branch.

[0015] Optionally, a connecting branch is arranged between two adjacent pH monitoring branches, a three-way valve is arranged on the connecting branch, and the three-way valve is connected with the cleaning pipeline.

[0016] Optionally, the three-way valve is a three-way electromagnetic valve.

[0017] Optionally, a medicine feeding pump is further arranged on the cleaning pipeline, and the medicine feeding pump can pump the cleaning medicine into the connecting branch and the pH monitoring branch in sequence.

[0018] Optionally, the medicine feeding pump is a peristaltic pump.

[0019] The pH value monitoring device has the following beneficial effects:

[0020] The pH value monitoring device provided by the utility model uses cleaning medicine with a known pH value, measures the pH value of the cleaning medicine by the pH meter after cleaning, and records the measured value. By comparing the known value and the measured value of the cleaning medicine, the pH meter can be calibrated. Compared with the prior art, the utility model does not need to set a special calibration device, but can clean and calibrate the pH meter at the same time by using the cleaning medicine, so that the pH value monitoring device has a small size, a compact internal structure, improved monitoring efficiency and reduced monitoring cost. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 is a schematic view of the pH value monitoring device provided by the utility model embodiment.

[0022] In the drawings:

[0023] 1, first pH monitoring branch; 11, first switch valve; 12, first pH meter; 13, first water trap;

[0024] 2, second pH monitoring branch; 21, second switch valve; 22, second pH meter; 23, second water trap;

[0025] 3, connecting branch;

[0026] 4, cleaning pipeline; 41, medicine sending pump; 42, medicine tank;

[0027] 5, three-way valve; 6, control unit; 7, water inlet pipeline; 8, water outlet pipeline. DETAILED DESCRIPTION

[0028] The utility model will be described in further detail below in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0029] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0030] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0031] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification of operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0032] As Figure 1As shown, the pH monitoring device provided by the embodiment comprises a pH monitoring pipeline and a cleaning pipeline 4. A pH meter for measuring the pH value of the wastewater to be measured is arranged on the pH monitoring pipeline. One end of the cleaning pipeline 4 is selectively communicated with the pH monitoring branch, and the other end of the cleaning pipeline 4 is connected with a reagent tank 42. The reagent tank 42 stores a cleaning reagent with a known pH value. When the cleaning pipeline 4 is communicated with the pH monitoring pipeline, the cleaning reagent in the reagent tank 42 flows into the pH monitoring pipeline from the cleaning pipeline 4, thereby cleaning the pH meter on the pH monitoring pipeline. After the cleaning is completed, the pH meter measures the pH value of the cleaning reagent and records it as a measured value. By comparing the known value and the measured value of the cleaning reagent, the calibration of the pH meter is realized. For example, it is assumed that the pH value of the known cleaning reagent is 2. The measured pH value is subtracted from the known value 2. If the absolute value is less than 1, the pH meter is considered normal. If the absolute value is greater than 1, the pH meter is considered abnormal and needs to be cleaned again. If it is still greater than 1, manual maintenance and repair are required. The absolute value less than 1 is also an example value, and the actual calibration value can be adaptively set according to the actual calibration requirement. By using the above calibration method, a special calibration device does not need to be arranged in the pH monitoring device. The cleaning and calibration of the pH meter can be realized at the same time by using the cleaning reagent, thereby reducing the size of the pH monitoring device and the monitoring cost.

[0033] Optionally, as shown, Figure 1 In the embodiment, the pH monitoring pipeline comprises a first pH monitoring branch 1 and a second pH monitoring branch 2. A first pH meter 12 is arranged on the first pH monitoring branch 1, and the first pH meter 12 is used to detect the pH value of the wastewater flowing into the first pH monitoring branch 1. A second pH meter 22 is arranged on the second pH monitoring branch 2, and the second pH meter 22 is used to detect the pH value of the wastewater flowing into the second pH monitoring branch 2. The first pH monitoring branch 1 and the second pH monitoring branch 2 alternately work in the pH monitoring device. In this way, the pH value of the wastewater to be measured can be continuously measured online. When one of the first pH monitoring branch 1 and the second pH monitoring branch 2 is in a working state, the other monitoring branch in a non-working state can be communicated with the cleaning pipeline 4, thereby cleaning and calibrating the pH meter on the branch, and improving the working efficiency of the pH monitoring device.

[0034] Further, as shown, Figure 1As shown, the first pH monitoring branch 1 and the second pH monitoring branch 2 are arranged in parallel in the embodiment, and the pH value monitoring device further comprises a water inlet pipeline 7 and a water outlet pipeline 8, wherein the water inlet ends of the first pH monitoring branch 1 and the second pH monitoring branch 2 are communicated with the water inlet pipeline 7, and the water outlet ends of the first pH monitoring branch 1 and the second pH monitoring branch 2 are communicated with the water outlet pipeline 8. Such arrangement can reduce the number of water inlet pipeline 7 and water outlet pipeline 8 required in the pH value monitoring device, simplify the internal structure of the pH value monitoring device, and further reduce the volume and design cost of the pH value monitoring device.

[0035] It can be understood that in some other embodiments, the pH monitoring pipeline can also comprise two or more pH monitoring branches, and a pH meter is arranged on each pH monitoring branch, and the multiple pH monitoring branches are arranged in parallel and alternately work, the water inlet ends of the multiple pH monitoring branches are communicated with the water inlet pipeline 7, and the water outlet ends of the multiple pH monitoring branches are communicated with the water outlet pipeline 8, that is, the number of pH monitoring branches can be set according to actual monitoring requirements, which is not limited herein.

[0036] Further, as shown in the figure, Figure 1 The first pH monitoring branch 1 is provided with a first switch valve 11, and the first switch valve 11 is arranged between the water inlet end of the first pH monitoring branch 1 and the first pH meter 12, for controlling the on-off of the first pH monitoring branch 1. The second pH monitoring branch 2 is provided with a second switch valve 21, and the second switch valve 21 is arranged between the water inlet end of the second pH monitoring branch 2 and the second pH meter 22, for controlling the on-off of the second pH monitoring branch 2. Since the first pH monitoring branch 1 and the second pH monitoring branch 2 alternately work, when the first switch valve 11 is opened, the second switch valve 21 is closed, at this time, the first pH monitoring branch 1 is in working state, and the second pH monitoring branch 2 is in non-working state, or when the second switch valve 21 is opened, the first switch valve 11 is closed, at this time, the second pH monitoring branch 2 is in working state, and the first pH monitoring branch 1 is in non-working state.

[0037] It can be understood that in some other embodiments, when the pH monitoring pipeline comprises two or more pH monitoring branches, a switch valve needs to be arranged between the water inlet end and the pH meter on each pH monitoring branch, when one of the pH monitoring branches works, the switch valve on this branch is opened, and the switch valves on the other branches are closed.

[0038] Optionally, the first switch valve 11 and the second switch valve 21 in the embodiment are both electromagnetic valves, as shown in the figure, Figure 1As shown, the pH monitoring device in this embodiment also includes a control unit 6. The control unit 6 can be a centralized or distributed controller. For example, the controller can be a single microcontroller or a combination of multiple distributed microcontrollers. The microcontroller can run a control program to control the first switching valve 11 and the second switching valve 21 to achieve their functions. By setting the first switching valve 11 and the second switching valve 21 as solenoid valves, the control unit 6 can control the opening and closing of the first switching valve 11 and the second switching valve 21, realizing automated monitoring of the pH value without manual operation. This not only reduces labor costs but also avoids the danger to operators caused by wastewater leakage from the monitoring branch during operation.

[0039] It is understood that in some other embodiments, the first switching valve 11 and the second switching valve 21 may also be selected from other types of switching valves as needed, and no limitation is made here. When the pH monitoring pipeline includes two or more pH monitoring branches, the switching valves on multiple pH monitoring branches may all be solenoid valves, or other types of switching valves may be selected as needed, and no limitation is made here.

[0040] Optionally, such as Figure 1 As shown, in this embodiment, a first water trap 13 is also provided on the first pH monitoring branch 1, and the first water trap 13 is located between the first pH meter 12 and the outlet end of the first pH monitoring branch 1. A second water trap 23 is also provided on the second pH monitoring branch 2, and the second water trap 23 is located between the second pH meter 22 and the outlet end of the second pH monitoring branch 2. By providing water traps on the pH monitoring branches, when the pH monitoring branches are not in operation, the cleaning agent cleans the pH meter and replaces the wastewater in the water trap, so that the probe part of the pH meter is immersed in the cleaning agent during non-operation periods, thereby protecting the sensitive element of the pH meter probe part and ensuring the accuracy and stability of pH measurement.

[0041] It is understood that in some other embodiments, when the pH monitoring pipeline includes two or more pH monitoring branches, a water trap can be installed between the outlet end of each pH monitoring branch and the pH meter to protect the pH meter on that branch.

[0042] like Figure 1As shown, in the embodiment, a connecting branch 3 is further arranged between the first pH monitoring branch 1 and the second pH monitoring branch 2. One end of the connecting branch 3 is connected between the first switch valve 11 and the first pH meter 12 on the first pH monitoring branch 1, and the other end of the connecting branch 3 is connected between the second switch valve 21 and the second pH meter 22 on the second pH monitoring branch 2. A three-way valve 5 is further arranged on the connecting branch 3. The three-way valve 5 has one inlet and two outlets. The inlet is in communication with the cleaning pipeline 4, and the two outlets are in communication with the first pH monitoring branch 1 and the second pH monitoring branch 2 through the connecting branch 3, respectively. When the first pH monitoring branch 1 or the second pH monitoring branch 2 is in a non-working state, the inlet of the three-way valve 5 is in communication with the corresponding outlet, so that the cleaning medicament in the medicament tank 42 can flow into the first pH monitoring branch 1 or the second pH monitoring branch 2 through the cleaning pipeline 4 and the connecting branch 3, thereby cleaning the pH meter on the non-working branch.

[0043] It can be understood that in some other embodiments, when the pH monitoring pipeline includes more than two pH monitoring branches, a connecting branch 3 is arranged between each two adjacent pH monitoring branches, and a three-way valve 5 is arranged on each connecting branch 3, and the three-way valve 5 is connected with the cleaning pipeline 4.

[0044] Optionally, the three-way valve 5 in the embodiment is a three-way electromagnetic valve, and thus the communication between the inlet and the two outlets of the three-way electromagnetic valve can be controlled by the control unit 6, so as to realize automatic cleaning of the pH value monitoring device without manual operation, thereby reducing labor cost.

[0045] It can be understood that in some other embodiments, the three-way valve 5 can also be selected according to actual needs, which is not limited herein. When the pH monitoring pipeline includes more than two pH monitoring branches, the three-way valves 5 on the plurality of pH monitoring branches can all use three-way electromagnetic valves, or can be selected according to actual needs, which is not limited herein.

[0046] As shown, in the embodiment, a cleaning pipeline 4 is further arranged on the first pH monitoring branch 1 and the second pH monitoring branch 2. The cleaning pipeline 4 is in communication with the first pH monitoring branch 1 and the second pH monitoring branch 2 through the first switch valve 11 and the second switch valve 21, respectively. The cleaning pipeline 4 is in communication with the medicament tank 42 through a cleaning pump 41 and a three-way valve 5. Figure 1

[0047] ​Optionally, the medicine delivery pump 41 in the embodiment is a peristaltic pump. The medium delivered by the peristaltic pump does not contact the pump body, which is beneficial to the delivery of some media with strong corrosiveness to metal. Since the delivered medium only moves in the hose, cleaning is only needed for the hose, and cleaning and disassembly are simple and fast, and maintenance cost is low. It can be understood that in some other embodiments, the medicine delivery pump 41 can also be selected according to actual needs, and other types of pumps can also be selected, which are not limited herein.

[0048] The specific working process of the pH monitoring device (taking an example of having two pH monitoring branches) provided in the embodiment is as follows:

[0049] 1. The first switch valve 11 on the first pH monitoring branch 1 is opened, the second switch valve 21 on the second pH monitoring branch 2 is closed, and the cleaning pipeline 4 is closed. Waste water flows into the first pH monitoring branch 1 from the water inlet pipeline 7, and the first pH meter 12 on the first pH monitoring branch 1 determines and records the pH value data of the waste water in real time. When the pH value exceeds the preset value, an alarm will be sent, and the staff will handle the problem according to the alarm indication. The preset value is an empirical value in the actual production process.

[0050] 2. After 6 hours, the first switch valve 11 on the first pH monitoring branch 1 is closed, the second switch valve 21 on the second pH monitoring branch 2 is opened, and the waste water flows through the second pH monitoring branch 2. The second pH meter 22 on the second pH monitoring branch 2 determines and records the pH value data of the waste water in real time. When the pH value exceeds the preset value, an alarm will be sent, and the staff will handle the problem according to the alarm indication.

[0051] At the same time, the cleaning pipeline 4 is connected with the first pH monitoring branch 1, and the medicine delivery pump 41 is started to pump the cleaning medicine in the medicine tank 42 into the first pH meter 12 on the first pH monitoring branch 1, and replace the waste water in the first pH meter 12 with the cleaning medicine according to the double volume, so as to clean and soak the probe of the first pH meter 12. It is known that the pH value of the cleaning medicine is 2. After 20 minutes of soaking, the pH value of the cleaning medicine is measured by the first pH meter 12, so as to calibrate the first pH meter 12. Specifically, the measured pH value is subtracted from the known value 2, and if the absolute value is less than 1, it is considered that the pH meter is normal; if the absolute value is greater than 1, it is considered that the pH meter is abnormal and needs to be cleaned again. If it is still greater than 1, manual maintenance is needed. The absolute value less than 1 is an example value, and the actual calibration value can be adaptively set according to actual calibration needs.

[0052] 3. The first pH monitoring branch 1 and the second pH monitoring branch 2 work alternately, and the alternation period is 6 hours. If one of the branches is repaired or damaged, the other branch needs to work alone. When working alone, cleaning and soaking are performed every 6 hours, the cleaning and soaking time is 20 minutes, the pH meter is normal and continues to work, the pH meter is abnormal and needs to be repaired, and both branches are abnormal and need to be replaced with new equipment.

[0053] It can be understood that in the above workflow, the working order in which the first pH monitoring branch 1 and the second pH monitoring branch 2 start can be replaced, that is, the second pH monitoring branch 2 starts first, and the first pH monitoring branch 1 starts later, which does not affect the effect of the pH value monitoring device.

[0054] The pH value monitoring device provided by the utility model can be directly calibrated to the pH meter when the cleaning is completed by setting the pH value of the cleaning medicament as a known value, without the need to set a special calibration device, thereby making the pH value monitoring device smaller in size and more compact in internal structure, and reducing the design cost. Meanwhile, by setting multiple monitoring branches to work alternately, when the pH meter on one of the monitoring branches is cleaned or replaced, another monitoring branch can be used to continuously measure the pH value of the wastewater online, uninterrupted measurement is realized, the monitoring process is automatically controlled by the control unit 6, thereby reducing the labor intensity of the workers and reducing the labor cost. In addition, the collected pH value data can be stored and analyzed, and after integration with the water quantity data, the required medicament dosage at the production end can be predicted, rough estimation of the operation parameters is achieved, and dynamic adjustment of the medicament reserve quantity is facilitated.

[0055] Obviously, the above embodiments of the utility model are only examples for clearly illustrating the utility model, and are not a limitation on the embodiments of the utility model. For ordinary skilled persons in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the utility model. Here, all the embodiments need not and cannot be exhausted. Any modification, equivalent substitution and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A pH monitoring device, characterized in that, The application relates to a pH value monitoring device for monitoring the pH value of waste water. The pH value monitoring device comprises a pH monitoring pipeline for leading in waste water to be monitored; a pH meter arranged in the pH monitoring pipeline; a cleaning pipeline (4) having one end selectively communicated with the pH monitoring pipeline; a medicament tank (42) communicated with the other end of the cleaning pipeline (4), and storing a cleaning medicament with a known pH value in the medicament tank (42), the cleaning medicament being used for cleaning the pH meter. The pH monitoring pipeline comprises at least two pH monitoring branches, each of which is provided with the pH meter, and the at least two pH monitoring branches are alternately operated, and the pH monitoring branch in a non-working state is communicated with the cleaning pipeline (4). The pH value monitoring device further comprises a water inlet pipeline (7) and a water outlet pipeline (8), and the at least two pH monitoring branches are arranged in parallel, the water inlet ends of the pH monitoring branches are communicated with the water inlet pipeline (7), and the water outlet ends of the pH monitoring branches are communicated with the water outlet pipeline (8). Each of the pH monitoring branches is provided with a switch valve arranged between the water inlet end of the pH monitoring branch and the pH meter, and the switch valve is used for controlling the on-off of the pH monitoring branch.

2. The pH monitoring device of claim 1, wherein, The switch valve is an electromagnetic valve.

3. The pH monitoring device of claim 2, wherein, Each of the pH monitoring branches is further provided with a water trap arranged between the pH meter and the water outlet end of the pH monitoring branch.

4. The pH monitoring device of claim 2, wherein, Adjacent two of the pH monitoring branches are provided with a connecting branch (3), and the connecting branch (3) is provided with a three-way valve (5) connected with the cleaning pipeline (4).

5. The pH monitoring device of claim 4, wherein, The three-way valve (5) is a three-way electromagnetic valve.

6. The pH monitoring device of claim 2, wherein, The cleaning pipeline (4) is further provided with a medicament feeding pump (41), and the medicament feeding pump (41) can sequentially pump the cleaning medicament into the connecting branch (3) and the pH monitoring branch.

7. The pH monitoring device of claim 2, wherein, The medicament feeding pump (41) is a peristaltic pump.

8. The pH monitoring device of claim 7, wherein, ​ 9. The pH monitoring device of claim 7, wherein, ​ 10. The pH monitoring device of claim 9, wherein, ​

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