Automatic cleaning, calibrating and maintaining device for pH sensor probe

Abstract

The utility model discloses an automatic cleaning, calibrating and maintaining device for a pH sensor probe, which comprises a telescopic rod, the pH sensor probe, a cleaning container, a rotational flow cleaner, a cut-off valve, a medium discharge port and a device integrated protective cover, a medium conveying pipeline system is connected with a rotational flow cleaner pipeline, the pH sensor probe is arranged in a channel penetrating mode, and the device integrated protective cover is arranged in the cleaning container. The working state of extending out of the medium discharging opening is achieved, the cleaning calibration maintenance state of retracting to the position above the cut-off valve is further achieved, and in the state, closing of the cut-off valve can form a space needed by the cleaning calibration maintenance state. According to the utility model, the probe can be cleaned, calibrated and maintained in situ at a monitoring point, so that the problems of insufficient timeliness, inconsistent quality, easy pollution accumulation, electrode damage, shortened service life and the like of manual maintenance of the probe in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the cleaning calibration maintenance technology field of the immersed continuous online monitoring sensor probe in sewage treatment, especially, a kind of pH sensor probe automatic cleaning calibration maintenance device. BACKGROUND

[0002] The method for continuously and rapidly determining the pH of the measured liquid is based on the two-electrode method, and the two electrodes are respectively an indicating electrode and a reference electrode. The current online pH sensor probe used in sewage treatment plants has designed the two electrodes as a whole, which is convenient for on-site measurement and daily maintenance.

[0003] The pH sensor probe generally uses a glass electrode, wherein the indicating electrode is sensitive to hydrogen ions, and is made of a sensitive glass membrane. It can produce a change in the potential of the gel layer inside and outside the sensitive glass membrane with the change of the hydrogen ions in the measured liquid. The reference electrode has no response to hydrogen ions and is made of glass that has no response to hydrogen ions. It can provide the same and stable potential point. The pH value of the measured solution can be determined by the potential difference between the two electrodes. Under ideal conditions and at a solution temperature of 25 DEG C, 59.16 mV = 1 pH.

[0004] In the use environment of sewage treatment plants, the pH sensor probe is mostly immersed, that is, it is directly set in the measured liquid and continuously measures the pH with the water flow. The measured liquid includes raw sewage, activated sludge mixture, other treatment unit sewage, and discharged sewage, etc. The raw sewage varies greatly depending on the type of sewage plant and is usually divided into municipal sewage and industrial wastewater.

[0005] The water quality of industrial wastewater is complex, and the measurement environment is variable. The activated sludge mixture is mostly stable, but the measurement environment is poor. The measurement environment of other treatment unit sewage varies according to the process of the treatment unit. The measurement environment of treated sewage is the best, as it has less pollutants and meets the discharge standard. However, for standard sewage, the measurement environment is still poor.

[0006] Due to the inherent disadvantages of glass electrode, such as fragility and susceptibility to environmental interference, the contamination of the pH sensor probe is more frequent in raw sewage, activated sludge mixture and other treatment unit sewage. The contamination that affects the pH measurement result usually occurs at two places, such as the indicating electrode sensitive glass bulb and the reference electrode liquid interface, for example, the attachment of suspended matter pollutants such as activated sludge, the long-term accumulation of calcium chloride and calcium carbonate in water, etc., which affects the accuracy, sensitivity and response characteristics of the pH sensor.

[0007] At present, the cleaning, calibration and maintenance of the pH sensor probe are basically manually performed, and there are usually problems of untimely maintenance, inconsistent maintenance quality, glass electrode damage in maintenance, etc. Especially in the working conditions with poor and changeable measurement environment, the maintenance of the pH sensor probe is more frequent. Through manual cleaning, calibration and maintenance, it is difficult to complete the cleaning, calibration and maintenance in time, efficiently and with high quality, thereby causing the accumulation of pollution, gradually deteriorating the maintenance effect, affecting the accuracy of pH measurement data, and shortening the service life of the sensor. Content of the utility model

[0008] The utility model discloses a kind of pH sensor probe automatic cleaning calibration maintenance device, to realize the automatic cleaning, automatic calibration and automatic maintenance of pH sensor probe. Further solve the problems of maintenance timeliness deficiency, maintenance quality is uneven, easy to appear pollution accumulation and sensor damage, affect sensor detection effect and service life in manual operation.

[0009] Therefore, the utility model provides a kind of pH sensor probe automatic cleaning calibration maintenance device, it include: telescopic rod, pH sensor probe, cleaning container, cyclone cleaner, cut-off valve, medium discharge port, device integrated protective cover, the bottom of the telescopic part of the telescopic rod is connected with the pH sensor probe, the cleaning container, the cyclone cleaner, cut-off valve, medium discharge port are sequentially connected from top to bottom, form passageway, the fixed part of the telescopic rod is connected to device integrated protective cover, the cyclone cleaner is connected with the medium delivery pipeline system of outside, the pH sensor probe is arranged in the mode of through passageway, with the working state of protruding medium discharge port and the cleaning calibration maintenance state of retracting to the upper of cut-off valve, when the pH sensor probe is in cleaning calibration maintenance state, cut-off valve is closed to constitute the space required for cleaning calibration maintenance state.

[0010] Further, the above-mentioned cleaning container is cylindrical, and its top is open.

[0011] Further, the above-mentioned pH sensor probe automatic cleaning calibration maintenance device system includes double pH sensor probe automatic cleaning calibration maintenance devices arranged at a single monitoring point and a double device connector, wherein one of the double pH sensor probe automatic cleaning calibration maintenance devices is in working state, and the other is in cleaning maintenance calibration state, and the two work alternately.

[0012] Further, the above-mentioned cyclone cleaner has four holes at the set position, and each hole is connected with the common delivery pipeline of cleaning agent, flushing agent and protective agent in the medium pipeline delivery system, calibration agent 1 delivery pipeline, calibration agent 2 delivery pipeline and compressed air delivery pipeline.

[0013] Further, the telescopic part of the telescopic rod is connected with the pH sensor probe through a connector, and the fixed part of the telescopic rod is connected to the device integrated protective cover through a telescopic rod connector.

[0014] Compared with the prior art, the pH sensor probe automatic cleaning calibration and maintenance device system has the following technical effects:

[0015] 1、The device is connected with the pH sensor probe through a telescopic rod, realizes switching of the working state and the cleaning and maintenance calibration state of the pH sensor probe, and constitutes a required space for cleaning and maintenance calibration through connection of a cleaning container, a cyclone cleaner and a shut-off valve.

[0016] The device solves the problems of insufficient timeliness, inconsistent quality, easy pollution accumulation, electrode damage and reduced service life in conventional pH sensor probe cleaning, calibration and maintenance work.

[0017] In addition to the purposes, features and advantages described above, the pH sensor probe automatic cleaning calibration and maintenance device system has other purposes, features and advantages. BRIEF DESCRIPTION OF DRAWINGS

[0018] The drawings accompanying the specification of this application form a part hereof, serve to provide further understanding of the present application, and together with the description of the present application make apparent to those skilled in the art the present application and the manner of practicing it. In the drawings:

[0019] Figure 1 is a schematic view of a pH sensor probe automatic cleaning calibration and maintenance device system according to the present application.

[0020] KEY

[0021] 1, telescopic rod; 2, connector; 3, pH sensor probe; 4, cleaning container; 5, cyclone cleaner; 5-1, common delivery pipeline of cleaning agent (a), flushing agent (b) and protective agent (c); 5-2, delivery pipeline of calibration agent 1 (d); 5-3, delivery pipeline of calibration agent 2 (e); 5-4, delivery pipeline of compressed air (f); V1, cleaning agent (a) control valve; V2, flushing agent (b) control valve; V3, protective agent (c) control valve; V4, compressed air control valve; P1, common delivery metering device of cleaning agent (a), flushing agent (b) and protective agent (c); P2, calibration agent 1 (d) delivery metering device; P3, calibration agent 2 (e) delivery metering device; 6, shut-off valve; 7, medium discharge port; 8, telescopic rod connector; 9, double device connector; 10, device integrated protective cover; 11, PLC controller. DETAILED DESCRIPTION

[0022] The pH sensor probe automatic cleaning and calibration maintenance device system of the present application will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0023] As shown in the drawings, the pH sensor probe automatic cleaning and calibration maintenance device system of the present application comprises a pH sensor probe automatic cleaning and calibration maintenance device, a medium delivery pipeline system, and a PLC controller 11. Figure 1 The pH sensor probe automatic cleaning and calibration maintenance device of the present application comprises a telescopic rod 1, a connector 2, a cleaning container 4, a cyclone cleaner 5, a shut-off valve 6, a medium discharge port 7, a telescopic rod connector 8, a double device connector 9, and a device integrated protective cover 10.

[0024] The pipeline system comprises medium delivery pipelines 5-1, 5-2, 5-3, 5-4, control valves V1, V2, V3, V4, and delivery metering devices P1, P2, P3.

[0025] The telescopic part of the telescopic rod 1 is connected to the pH sensor probe 3 through the connector 2 at the lower end.

[0026] The cleaning container 4 is connected to the cyclone cleaner 5, the cyclone cleaner 5 is connected to the shut-off valve 6, and the shut-off valve 6 is connected to the medium discharge port 7.

[0027] The cleaning container 4, the cyclone cleaner 5, the shut-off valve 6, and the medium discharge port 7 are connected together, and the device integrated protective cover 10 is connected to the upper end of the cleaning container 4 and the lower end of the medium discharge port 7, forming a stable whole.

[0028] The device integrated protective cover 10 is connected and fixed to the non-telescopic part of the telescopic rod 1 through the telescopic rod connector 8, forming a stable whole.

[0029]

[0030] ​The device integrated protective cover 10 is connected by the double device connecting piece 9 to form a stable whole, and the double device connecting piece has a middle vertical fixed rod which is connected to the fixing device on the surveying point structure.

[0031] For the implementation of the single pH sensor probe automatic cleaning calibration maintenance device, the non- telescopic part of the telescopic rod 1 can be fixed on the fixed connecting rod of the original pH sensor probe 3 without additional fixing device.

[0032] The telescopic part of the telescopic rod 1 is connected with the pH sensor probe 3, and the hollow interior of the telescopic rod 1 passes through the connection of the cleaning container 4, the cyclone cleaner 5, the cut-off valve 6 and the medium discharge port 7.

[0033] The cleaning agent a, the flushing agent b, the protective agent c, the calibration agent 1 d, the calibration agent 2 e and the compressed air f are connected with the filling hole of the cyclone cleaner 5 through pipelines and connecting heads. Among them, the pipelines of the cleaning agent a, the flushing agent b and the protective agent c are respectively connected with the control valves V1, V2 and V3, the outlet pipelines of the control valves are combined into a single pipeline to the inlet of the cleaning and maintenance delivery metering device P1, and the pipeline is connected with the filling hole of the cleaning and maintenance agent of the cyclone cleaner 5 through the connecting head.

[0034] The pipelines of the calibration agent 1 d and the calibration agent 2 e are respectively connected with the delivery metering devices P2 and P3, and the outlet pipelines are respectively connected with the calibration agent filling hole of the cyclone cleaner 5 through the connecting head.

[0035] The compressed air pipeline is connected with the control valve V4, and the outlet pipeline is connected with the compressed air hole of the cyclone cleaner 5 through the connecting head.

[0036] For the implementation of the double pH sensor probe automatic cleaning calibration maintenance device, the above-mentioned cleaning agent a, flushing agent b, protective agent c, calibration agent 1 d, calibration agent 2 e, compressed air pipeline, control valve V1, V2, V3, V4, delivery metering device P1, P2, P3 need to be configured with two sets, and the corresponding pipeline connection and pipeline combination are completely the same as the above-mentioned mode. The pipeline system is respectively connected with two sets of pH sensor probe automatic cleaning calibration maintenance devices, and the cleaning agent a, the flushing agent b, the protective agent c, the calibration agent 1 d, the calibration agent 2 e and the compressed air share the same source.

[0037] The PLC controller 11 controls the circulation process of the two sets of pH sensor probe automatic cleaning calibration maintenance devices.

[0038] The following describes the automatic cleaning calibration maintenance method of the utility model by taking the double pH sensor probe automatic cleaning calibration maintenance device as an example.

[0039] As Figure 1As shown, set the probe B in working condition, probe A in maintenance cycle after the end of the cycle or waiting for the state of work.

[0040] Cleaning cycle

[0041] A, B probe working period is set by PLC control terminal platform, generally the same set time, also can be individually set according to the scene needs, the working period is not less than the total execution time of the set cleaning cycle, maintenance cycle and calibration cycle. The embodiment is set to 12h.

[0042] When the actual working time of B probe reaches 12h, the system enters the cleaning cycle. The cleaning cycle of the utility model comprises the following steps:

[0043] Step 1, the pH sensor probe 3 reaches the set working period, and the cleaning cycle starts.

[0044] Step 2, the PLC controller 11 transmits the pH sensor stop signal, and the pH sensor probe is marked as non-working state, and the detection value stops uploading.

[0045] Step 3, the telescopic rod 1 control starts, the telescopic rod 1 telescopic part retracts upward, and the pH sensor probe 3 is lifted upward to the bottom of the probe inside the cyclone cleaner 5, and the telescopic rod 1 control stops.

[0046] Step 4, the cut-off valve 6 control starts, the cut-off valve 6 is closed, and after closing in place, a closed space is formed, and the cut-off valve 6 control stops.

[0047] Step 5, the cleaning agent a control starts, the cleaning agent a pipeline valve V1 is opened, and after opening in place, the cleaning and maintenance delivery metering device P1 is opened, and the cleaning agent a is pumped into the cyclone cleaner 5. After reaching the set metering value, the cleaning and maintenance delivery metering device P1 stops, the cleaning agent a pipeline valve V1 is closed, and the cleaning agent a control stops. The pH sensor probe 3 is in the cleaning agent a static soaking state.

[0048] Step 6, during the set static soaking time, the compressed air control is periodically started, the compressed air pipeline valve V4 is opened, the compressed air is pressed into the cyclone cleaner 5, and the directional cyclone is formed by contacting the cleaning agent a through the guide groove, and the pH sensor probe 3 is cleaned. After reaching the set cleaning time, the compressed air pipeline valve V4 is closed. After reaching the set cleaning times, the compressed air control stops.

[0049] Step 7, the cut-off valve 6 control starts, the cut-off valve 6 is opened, and after opening in place, the set delay interval is reached, the cut-off valve 6 is closed, and after closing in place, the cut-off valve 6 control stops.

[0050] Step 8, the flushing agent control starts, the flushing agent b pipeline valve V2 opens, and after opening to the position, the cleaning and maintenance delivery metering device P1 opens, and the flushing agent b is pumped into the cyclone cleaner 5. After reaching the set metering value, the cleaning and maintenance delivery metering device P1 stops, the flushing agent b pipeline valve V2 is closed, and the flushing agent b control stops.

[0051] Step 9, the compressed air control starts, the compressed air pipeline valve V4 opens, and the compressed air is pressed into the cyclone cleaner 5, and the directional cyclone is formed by the contact of the compressed air and the cleaning agent a through the guide groove, and the pH sensor probe 3 is flushed. After reaching the set flushing time, the compressed air pipeline valve V4 is closed, and the compressed air control stops.

[0052] Step 10, the cut-off valve 6 control starts, the cut-off valve 6 opens, and after opening to the position, the set time interval is reached, the cut-off valve 6 is closed, and after closing to the position, the cut-off valve 6 control stops.

[0053] Maintenance cycle

[0054] After the cleaning cycle or the calibration cycle ends, the maintenance cycle is continued. After the cleaning cycle ends, the system determines to enter the maintenance cycle; or after the calibration cycle ends, the difference between the remaining time of the A probe working cycle and the time required for the B probe maintenance cycle is greater than a set value, and the system enters the maintenance cycle. The maintenance cycle of the utility model comprises the following steps 1 to step 2.

[0055] Step 1, the protective agent c control starts, the protective agent c pipeline valve V3 opens, and after opening to the position, the cleaning and maintenance delivery metering device P1 opens, and the protective agent c is pumped into the cyclone cleaner 5. After reaching the set metering value, the cleaning and maintenance delivery metering device P1 stops, the protective agent c pipeline valve V3 is closed, and the protective agent c control stops.

[0056] Step 2, the pH sensor probe 3 is placed in the protective agent c for protection, and the standing protection set time is synchronized with the remaining time of the A probe working cycle.

[0057] Calibration cycle

[0058] When the B probe cleaning cycle ends, the program pauses, and the system enters the calibration cycle determination. The A and B probe calibration cycles are set by the PLC control end platform, and generally, the set times of the two are the same, and can also be individually set according to the needs of the scene, and the calibration cycle is not less than the set working cycle, and in the example, the calibration cycle is set to 120h.

[0059] When the system determines that the B probe calibration cycle timing is greater than or equal to the set cycle time, the calibration cycle is continued; when the system determines that the B probe calibration cycle timing is less than the set cycle time, the maintenance cycle is continued.

[0060] The early calibration judgment mode can be set through the PLC control terminal platform, and in the mode, when the system judges that the remaining time of the set calibration period is less than the set working period, the system will perform calibration cycle in advance.

[0061] The calibration cycle of the utility model comprises the following steps 1-6.

[0062] Step 1, calibration agent 1d control starts, calibration agent 1d delivery metering device P2 opens, and calibration agent 1d is pumped into the cyclone cleaner 5. After reaching the set metering value, calibration agent 1d delivery metering device P2 stops, and calibration agent 1d control stops.

[0063] Step 2, the pH sensor probe 3 is placed in calibration agent 1d and is stable, after reaching the set stable time, the PLC automatically reads the measured data, and the probe is calibrated.

[0064] Step 3, steps 7 to 10 in the cleaning cycle are performed.

[0065] Step 4, calibration agent 2e control starts, calibration agent 2e delivery metering device P3 opens, and calibration agent 2e is pumped into the cyclone cleaner 5. After reaching the set metering value, calibration agent 2e delivery metering device P3 stops, and calibration agent 2e control stops.

[0066] Step 5, the pH sensor probe 3 is placed in calibration agent 2e and is stable, after reaching the set stable time, the PLC automatically reads the measured data, and the probe is calibrated.

[0067] Step 6, steps 7 to 10 in the cleaning cycle are performed.

[0068] Working cycle

[0069] After the cleaning cycle, the maintenance cycle or the calibration cycle ends, the working cycle is continued. The working cycle of the utility model comprises the following steps 1-3.

[0070] Step 1, the cut-off valve 6 control starts, the cut-off valve 6 opens, and after opening to the position, the cut-off valve 6 control stops.

[0071] Step 2, the telescopic rod 1 control starts, the telescopic rod 1 telescopic component stretches downward, pushes the pH sensor probe 3 downward, and after the probe is immersed in the measured liquid to the set depth, the telescopic rod 1 control stops.

[0072] Step 3, the PLC controller 11 transmits the pH sensor opening signal, the pH sensor probe is marked as the working state, and the pH detection value starts to upload.

[0073] In the utility model, the cleaning cycle, the maintenance cycle, the calibration cycle and the working cycle can be used in combination according to the field requirement on the control terminal platform, and the set value parameters in each cycle can also be adjusted.

[0074] In the utility model, the double pH sensor monitoring and automatic cleaning calibration maintenance device system is adopted, two sets of pH sensor and two sets of pH sensor probe automatic cleaning calibration maintenance devices are installed at a single pH monitoring point, one set of PLC control system is matched, and the pH sensor probe automatic cleaning calibration maintenance under the pH continuous monitoring of the monitoring point is realized.

[0075] The two pH sensor probes alternately enter the working cycle, according to the set pH sensor probe working cycle, when one of the pH sensor probes (referred to as probe A) enters the working state through the working cycle, the other pH sensor probe (referred to as probe B) will successively perform the cleaning cycle and the maintenance cycle, and according to the set time determination, the calibration cycle is executed, and the specific mode is illustrated by the following examples:

[0076] The probe B is set to be in the working state, and the probe A is set to be in the maintenance cycle after the working state.

[0077] Step 1, the probe B reaches the set working cycle, the probe A starts the working cycle, and the probe B enters the cleaning cycle and waits for the starting state

[0078] Step 2, in the step 2 of the working cycle of the probe A, the telescopic rod 1 is controlled to stop, the probe B starts the cleaning cycle, and simultaneously performs the step 2 of the cleaning cycle (the PLC controller 11 transmits the pH sensor stop signal, the pH sensor probe is marked as a non-working state, and the measured value is stopped uploading), the probe A performs the step 3 of the working cycle, and the alternation of the working state of the double pH sensor probes is completed.

[0079] Step 3, the probe B performs the subsequent cleaning cycle, and according to the set cycle time determination, the maintenance cycle is started or the calibration cycle is inserted after the cleaning cycle is completed.

[0080] Step 4, according to the set working cycle, the above steps are cycled to realize the pH sensor probe online cleaning calibration maintenance under the pH continuous monitoring state.

[0081] The above only describes the embodiments of the utility model, and is not used for limiting the utility model, for the person skilled in the art, the utility model can have various changes and changes. Any modification, replacement, improvement, etc. made within the spirit and principles of the utility model shall be included in the protection scope of the utility model.

Claims

1. An automatic cleaning, calibration, and maintenance device for a pH sensor probe, characterized in that, include: Telescopic rod (1), pH sensor probe (3), cleaning container (4), cyclone washer (5), shut-off valve (6), media outlet (7), integrated protective cover (10), The bottom of the telescopic component of the telescopic rod (1) is connected to the pH sensor probe (3). The cleaning container (4), the cyclone cleaner (5), the shut-off valve (6), and the medium outlet (7) are connected from top to bottom to form a channel. The fixed part of the telescopic rod (1) is connected to the device integrated protective cover (10). The cyclone cleaner (5) is connected to an external media delivery pipeline system. The pH sensor probe is arranged in a through-channel manner, with a working state extending out of the media outlet (7) and a cleaning calibration and maintenance state retracted above the shut-off valve (6). When the pH sensor probe is in the cleaning calibration and maintenance state, the shut-off valve (6) is closed to form the space required for the cleaning calibration and maintenance state.

2. The automatic cleaning, calibration, and maintenance device for pH sensor probes according to claim 1, characterized in that, The cleaning container (4) is cylindrical and has an open top.

3. The automatic cleaning, calibration, and maintenance device for pH sensor probes according to claim 1, characterized in that, Includes an automatic cleaning, calibration and maintenance device for dual pH sensor probes arranged at a single monitoring point and a dual-device connector (9), wherein one of the dual pH sensor probe automatic cleaning, calibration and maintenance devices is in working state and the other is in cleaning, maintenance and calibration state, and the two work alternately.

4. The automatic cleaning, calibration, and maintenance device for pH sensor probes according to claim 1, characterized in that, The cyclone cleaner (5) has four openings at set positions, each of which is connected to the cleaning agent-rinse agent-protectant delivery pipeline, calibration agent 1 delivery pipeline, calibration agent 2 delivery pipeline, and compressed air delivery pipeline in the media pipeline delivery system.

5. The automatic cleaning, calibration, and maintenance device for pH sensor probes according to claim 1, characterized in that, The telescopic component of the telescopic rod (1) is connected to the pH sensor probe via a connector (2), and the fixed part of the telescopic rod (1) is connected to the device integrated protective cover (10) via a telescopic rod connector (8).

Images