CN111220664A - Open type pH value on-line measurement and automatic cleaning device - Google Patents
Open type pH value on-line measurement and automatic cleaning device Download PDFInfo
- Publication number
- CN111220664A CN111220664A CN201911063759.3A CN201911063759A CN111220664A CN 111220664 A CN111220664 A CN 111220664A CN 201911063759 A CN201911063759 A CN 201911063759A CN 111220664 A CN111220664 A CN 111220664A
- Authority
- CN
- China
- Prior art keywords
- waste water
- liquid level
- sampling
- cleaning device
- sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 69
- 238000005259 measurement Methods 0.000 title claims description 43
- 239000002351 wastewater Substances 0.000 claims abstract description 178
- 239000007788 liquid Substances 0.000 claims abstract description 166
- 238000005070 sampling Methods 0.000 claims abstract description 164
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 239000007921 spray Substances 0.000 claims description 12
- 238000012544 monitoring process Methods 0.000 abstract description 6
- 238000007599 discharging Methods 0.000 abstract 1
- 239000002609 medium Substances 0.000 description 36
- 230000000694 effects Effects 0.000 description 12
- 238000005507 spraying Methods 0.000 description 11
- 230000009471 action Effects 0.000 description 9
- 239000012737 fresh medium Substances 0.000 description 8
- 230000005484 gravity Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007667 floating Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000000717 retained effect Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- 239000012736 aqueous medium Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000012780 transparent material Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000010926 purge Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/302—Electrodes, e.g. test electrodes; Half-cells pH sensitive, e.g. quinhydron, antimony or hydrogen electrodes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
- G01N27/28—Electrolytic cell components
- G01N27/30—Electrodes, e.g. test electrodes; Half-cells
- G01N27/38—Cleaning of electrodes
Abstract
The utility model provides an open pH value on-line measuring and self-cleaning device, belongs to the petrochemical field, the device is including sample chamber and waste water chamber, the pH meter is placed to the sample intracavity, sample chamber bottom is equipped with belt cleaning device, belt cleaning device can wash the pH meter, the sample chamber links to each other through the sampling tube with production process water pipeline, sample chamber liquid outlet is equipped with the plugging device that can open and shut, the sample chamber links to each other with the waste water chamber, waste water chamber bottom is equipped with the waste water drainage mouth, sample chamber, waste water chamber are open. The functions of automatically sampling by using an open cup, measuring the pH value on line in real time under normal pressure, automatically discharging waste water, and automatically cleaning and maintaining the pH electrode series are realized. The problems that the pH electrode is inaccurate to measure in a pipeline with pressure and the diameter of the bottle is easy to be polluted and damaged in the pH value online monitoring process are solved.
Description
Technical Field
The invention belongs to the field of petrochemical industry, and relates to an open type automatic sampling and measuring and pH electrode automatic cleaning device for pH value of production process water, in particular to an open type online pH value measuring and automatic cleaning device.
Background
The pH value is an essential parameter needing to be controlled in the production of petrochemical enterprises, the earliest pH value measurement is that a sample is manually taken from the site and then taken back to a laboratory for measurement by a table pH meter, and after the measurement, the measured value is manually uploaded to an enterprise database and is provided for relevant departments in the enterprises through a local area network. The pH electrode was manually cleaned after each measurement. With the development of science and technology, the pH value monitoring in the production process is developed to an online real-time monitoring stage, as shown in figure 1, a rectangular connector 2 is welded on a production process water pipeline 1 through a hole, a pH electrode 3 is installed on the short connector 2 to enable the pH electrode to be directly contacted with a measured aqueous medium, the pH value of the medium is measured through a pH meter 4, the measurement result is uploaded to a monitor and a server through an instrument bus 5, and the server directly provides the measurement result for relevant departments in enterprises through an enterprise local area network for use. Therefore, the pH value measurement is developed from the original manual sampling measurement to all-weather uninterrupted real-time measurement, which is also an inevitable trend of scientific and technological development.
Until now, the pH electrode is still the only technical means for enterprises to measure the pH value of the aqueous medium. The pH electrode consists of a measuring electrode, a reference electrode and a salt bridge loop, and the core element of the pH electrode is a sensitive glass membrane made of special glass and positioned at the front end part of the pH electrode. The pH electrode has strict requirements on the application environment, the normal measurement method is to measure in an open container under normal pressure, and the pH electrode is cleaned and maintained after measurement. The pH electrode is in a working environment shown in figure 1, is in a pressurized environment and needs to be in continuous contact with a measured medium for a long time, the production process water medium contains a plurality of harmful substances polluting the pH electrode, the pH electrode is in contact with the measured medium for a long time in a pressurized environment, irreversible pollution damage is rapidly caused to the pH electrode, the service life of most on-line pH electrodes is only two to three months, and the service life of each on-line pH electrode is less than one month. This is the only fatal problem encountered in online monitoring of pH value, which makes the online monitoring service of pH value in industrial production very unsmooth. On-line pH electrodes are usually composite electrodes with high quality, and the cost of each electrode is about 0.5 ten thousand yuan. The pollution and inaccurate measurement of the pH electrode, frequent replacement of the pH electrode and the like cause related damages to production, manpower, material resources and financial resources, so the problem of the pollution of the pH electrode becomes an insurmountable bottle diameter in the process of automatic and intelligent development of enterprise production. In contrast, desktop pH electrodes used in laboratories typically cost less than one twentieth of the cost of on-line pH electrodes, and because they can be cleaned after measurement in an open environment, the desktop pH electrodes typically have a useful life of no less than two years.
In the process of solving the pollution of the pH electrode, some technical means for automatically cleaning the pH electrode on line appear in sequence, but no matter what automatic pH electrode cleaning technology, the working environment of the pH electrode under pressure can not be got rid of, which is seriously inconsistent with the condition of adopting an open cup to measure the pH value under the common condition, and the environment under pressure is also an important reason for causing pollution and inaccurate measurement to the pH electrode. The invention provides an open type pH value on-line measurement and pH electrode automatic cleaning device, which is invented in view of the background, not only provides an open type non-pressure measurement environment, but also soaks a pH electrode in a cleaning water medium after each measurement, and separates the pH electrode from the measured medium, so that the pH electrode is maintained and maintained, and the service life of the pH electrode is prolonged.
Disclosure of Invention
The technical problem to be solved by the invention is that a manual sampling and pH value measuring mode is simulated, a sample is automatically taken and taken into an open container through program control, the last-time measurement reserved medium in a sampling tube is automatically discharged at one time, the subsequent fresh medium is isolated from the last-time measurement reserved medium, a pH electrode is measured in the open container, the waste water is automatically discharged after the measurement, the pH electrode is cleaned by clear water, and the pH electrode is soaked in the clear water after the cleaning, so that the pH electrode is only contacted with the measured medium during the measurement, the polluted time is reduced, and the service life is prolonged.
The technical scheme is as follows:
the utility model provides an open pH value on-line measuring and self-cleaning device, the device is including sample chamber and waste water chamber, the pH meter is placed to the sample intracavity, sample chamber bottom is equipped with belt cleaning device, belt cleaning device can wash the pH meter, the sample chamber links to each other through the sampling tube with production process water pipeline, sample chamber liquid outlet is equipped with the plugging device that can open and shut, the sample chamber links to each other with the waste water chamber, waste water chamber bottom is equipped with the waste water drainage mouth, sample chamber, waste water chamber are open.
Further, it is cursory that the intracavity of taking a sample is equipped with the sample liquid level, the cursory cover of sample liquid level is outside in the pH meter, can reciprocate for the pH meter.
Furthermore, a gap is reserved between the sampling liquid level buoy and the pH meter and the side wall.
Further, sample chamber top is equipped with sample chamber lid, sample chamber lid central point puts and opens and has pH electrode hickey, and the pH electrode inserts the sample intracavity through hickey, sample chamber is covered to open and is had two guiding holes, and the sample liquid level floats and is equipped with two sample liquid level trigger bars, and sample liquid level trigger bar passes and with guiding hole clearance fit in following the guiding hole, but sample liquid level trigger bar and sample liquid level switch touching contact, sample chamber cover and open there is the overflow pipeline, and the overflow pipeline export is drawn forth from sample chamber lid lateral wall.
Furthermore, the lower surface of the sampling cavity cover is provided with hemispherical spherical surfaces at two sides of the pH meter.
Furthermore, the cleaning device is just opposite to the lower part of the pH meter, the cleaning device is an annular nozzle, the annular nozzle is provided with a small middle spray hole, an annular water spray hole is formed in the outer circle of the annular nozzle, and the cleaning device is connected with a cleaning control valve and a clean water pipeline.
Furthermore, the sampling cavity is connected with the waste water cavity through a communicating vessel, a three-way pipeline is arranged in the communicating vessel, an outlet on the three-way pipeline is communicated with the sampling cavity, a lower outlet of the three-way pipeline is communicated with the waste water tank, and a side outlet of the three-way pipeline is connected with the sampling pipe through a sampling control valve.
Furthermore, the wastewater cavity is internally provided with a wastewater liquid level float, a wastewater liquid level trigger rod and a conical plug are arranged on the wastewater liquid level float, a lower outlet of the three-way pipeline is in a conical surface form and is matched with an upper conical surface of the conical plug, a wastewater liquid level trigger rod guide groove is arranged in the communicating vessel, the wastewater liquid level trigger rod is in clearance fit with the guide groove, and the wastewater liquid level trigger rod can be in touch contact with a wastewater tank low liquid level switch.
Further, the waste water cavity is provided with a waste water overflow port, and the waste water overflow port is led out of the box body through a pipeline.
Furthermore, the sampling cavity cover is connected with a communicating vessel through a transparent round pipe, and the communicating vessel is connected with the waste water tank base through a transparent thick round pipe.
The specific scheme is as follows: an open type pH value on-line measurement and pH electrode automatic cleaning device comprises a sampling cavity and a waste water tank frame which are vertically discharged and communicated, wherein the sampling cavity and the waste water tank frame are composed of a sampling cavity cover 15, a transparent circular tube 16, a communicating vessel 20, a transparent thick circular tube 21 and a waste water tank base 22; the sampling cavity cover 15, the transparent round pipe 16, the communicating vessel 20, the transparent thick round pipe 21 and the waste water tank base 22 are fixedly connected in a sealing way; a threaded interface of the pH electrode 3 is arranged at the central position of the sampling cavity cover 15, and the pH electrode 3 is inserted into the sampling cavity from top to bottom from the threaded interface and is fixed through threads; two guide holes are formed in the sampling cavity cover 15, the sampling liquid level trigger rod 13 penetrates through the guide holes, the sampling liquid level trigger rod 13 is in clearance fit with the guide holes, and the inside of the sampling cavity is communicated with the outside air through the clearance. In three movable dimensions, the sampling liquid level trigger rod 13 can only float freely up and down and cannot move transversely.
An overflow pipeline is arranged on the sampling cavity cover 15, the outlet of the overflow pipeline is led out from the side wall of the sampling cavity cover, all the overflow pipelines are lower than the upper surface of the sampling cavity cover, and when the medium in the sampling cavity is ultrahigh, the medium preferentially flows out of the overflow pipeline;
the lower surface of the sampling cavity cover 15 is designed into a radial annular surface, and an annular pressurized water curtain sprayed by an annular nozzle 17 is impacted and diffused from an inner annular surface to an outer annular surface under the guidance of the annular surface and is scattered radially to the periphery along an angle of 360 degrees;
the transparent round tube 16 is made of transparent materials such as glass fiber reinforced plastics and the like, and the running state in the sampling cavity can be seen from the outside; the upper portion of the connector 20 is formed into a cup shape for receiving a sampling medium.
A cleaning water line is opened in the communicating vessel 20. The cleaning water pipeline enters from the side part and exits from the center of the top part, and the outlet is positioned at the same central line with the threaded interface of the pH electrode 3 arranged on the sampling cavity cover 15.
A three-way pipe 8 is opened in the communicating vessel 20. The upper outlet of the three-way pipeline 8 is communicated with the sampling cavity. The lower outlet of the three-way pipeline 8 is communicated with the waste water tank, and the central line of the lower outlet is superposed with the central line of the waste water tank. The outlet of the three-way pipeline 8 is arranged on the side wall of the communicating vessel 20 and is used for connecting a sampling tube.
The lower outlet of the three-way pipeline 8 is in a conical surface form and is just matched with the upper conical surface of the conical plug 26.
The transparent thick circular tube 21 is made of transparent materials such as glass fiber reinforced plastics, and the operation state in the waste water tank can be seen from the outside.
Two guide holes are formed in the communicating vessel 20. Wherein the left side guiding hole is a blind hole, and the right side guiding hole is a through hole. The left wastewater level trigger rod 11 is contained in a left guide blind hole on the communicating vessel 20, and the right wastewater level trigger rod 11 passes through a right guide hole on the communicating vessel 20. The wastewater liquid level trigger rod 11 is in clearance fit with the guide hole, and the clearance in the guide hole on the right side enables the interior of the wastewater tank to be communicated with the outside air. In three dimensions of movement, the wastewater level trigger rod 13 can only float freely up and down and cannot move transversely.
The connecting connector 20 is provided with a waste water overflow port 27. The outside of the overflow port of the waste water is fixedly connected with the overflow pipe in a sealing way, and the overflowing medium is guided out of the box body 28. The waste water tank base 22 is provided with a waste water discharge port.
An overflow port on the sampling cavity cover 15, a three-way pipe 10 and a guide hole on the right side of the communicating vessel 20 form a multifunctional structure, and the left outlet of the three-way pipe 10 is fixedly connected with the overflow port on the sampling cavity cover 15 in a sealing way. The lower outlet of the three-way pipe 10 is fixedly connected with the right guide hole on the communicating vessel 20 in a sealing way. The upper outlet of the tee 10 is open.
When the liquid level of the sampling cavity is ultrahigh, the medium can flow to a waste water tank through a pipeline formed by an overflow port on the sampling cavity cover 15, the three-way pipe 10 and the hole on the communicating vessel 20;
the waste water liquid level trigger rod 11 penetrates through the three-way pipe 10, and the waste water liquid level trigger rod 11 is in clearance fit with the inner wall of the three-way pipe 10, so that the waste water tank is communicated with the outside air, and the pressure in the waste water tank is normal pressure. In three movable dimensions, the wastewater liquid level trigger rod 11 is limited by a guide hole on the communicating vessel 20 and the three-way pipe 10, can only move in one dimension in the vertical direction, and cannot move transversely;
special structure of the annular nozzle 17. The annular nozzle 17 includes a middle small nozzle hole and an annular nozzle outside the small nozzle hole. The middle small spray hole is upward and directly opposite to the lower end part of the pH electrode 3, and the water column sprayed by the middle small spray hole is directly sprayed on the pH electrode 3. The annular nozzle is vertically upward and directly faces to a gap between the outer annular surface of the pH electrode 3 and the inner annular surface of the sampling liquid level float 9.
A streamline water spraying line is formed by a gap between the outer ring surface of the pH electrode 3 and the inner ring surface of the sampling liquid level float 9, a lower ring surface of the sampling cavity cover 15, a gap between the outer ring surface of the sampling liquid level float 9 and the inner ring surface of the transparent circular tube 16, and an annular water curtain sprayed by the annular nozzle 17 can carry spraying force under the guidance of the water spraying line, and radially sprays along an angle of 360 degrees until the annular water curtain returns to the upper surface of the communicating vessel 20. In the whole cleaning process, the cleaning water is sprayed with impact force instead of simple flow-through cleaning.
The annular sampling liquid level buoy 9 is connected with a sampling liquid level trigger rod 13 structure. The sampling liquid level float 9 is annular, and the inner ring space is used for placing the pH electrode 3. The sampling liquid level trigger rod 13 is fixedly connected to the sampling liquid level buoy 9 and is linked with the sampling liquid level buoy 9.
The sampling liquid level float 9 is made of a material with the specific gravity being lighter than that of water, and can float on the water surface and float up and down along with the change of the liquid level.
One of the sampling liquid level trigger rods 13 extends to the top of the device through a guide hole on the sampling cavity cover 15 and contacts with a sampling high liquid level switch. The other sampling liquid level trigger rod is contained in the guide hole;
the guide hole on sample liquid level trigger bar 13 and the sample chamber lid 15 is clearance fit for between, and the air can be through clearance to sample chamber and outside intercommunication, makes the sample intracavity be the ordinary pressure. Limited by matching, the sampling liquid level trigger rod can only float freely in the vertical direction but cannot move transversely in three moving dimensions;
the annular sampling liquid level buoy 9 and the pH electrode 3, the lower ring surface of the sampling cavity cover and the gaps between the annular surface of the transparent circular tube are symmetrically distributed, so that the annular water curtain sprayed by the annular nozzle 17 forms a uniform streamline spray washing route between the gaps. The spray washing lines are distributed in a radial manner from inside to outside like an m shape, and the whole circumference has no dead angle of 360 degrees.
The waste water liquid level float 25 is connected with the waste water liquid level trigger rod 11. The wastewater liquid level trigger rod 11 is fixedly connected to the wastewater liquid level buoy 25 and is linked with the sampling liquid level buoy 9.
The wastewater level float 25 is made of a material with a specific gravity lower than that of water, and can float on the water surface and float up and down along with the change of the liquid level.
The left wastewater level trigger lever 11 is contained within a guide blind hole in the left side of the communicating vessel 20. The right wastewater level trigger bar 11 extends to the top of the device through a guide hole on the communicating pipe 20 and the inside of the communicating pipe 10, and is contacted with the wastewater low level switch 12.
The wastewater liquid level trigger rod 11 is in clearance fit with the guide hole and the communicating pipe 10, and the air can communicate the inside and the outside of the wastewater tank through a clearance, so that the inside of the wastewater tank is at normal pressure. Limited by the fit, in three dimensions, the wastewater level trigger bar 11 can only float up and down in one dimension in the vertical direction, but cannot move laterally.
The conical plug 26 is fixedly connected to the center of the upper part of the wastewater liquid level float 25, the axis of the conical plug 26 is superposed with the axis of the wastewater liquid level float, the assembly is in an axis symmetric structure, and the upward buoyancy force received by the conical plug is symmetric, so that when the liquid level of the wastewater tank floats to a specified liquid level, the conical plug can plug the lower conical opening of the three-way pipeline 8 tightly.
The quantitative medium-removing and remaining structure 29 for the last measurement consists of a sampling cavity, a waste water tank, a three-way pipeline 8, a waste water liquid level trigger rod 11, a conical plug 26 and a waste water liquid level float 25. After the sampling control valve 7 is opened, the medium 29 which is measured and retained last time flows into the waste water tank firstly under the action of gravity, the medium 29 which is measured and retained last time is emptied, after the fresh medium 30 flows into the waste water tank in a micro amount, the waste water liquid level buoy 25 floats upwards and drives the conical plug 26 to block the lower outlet of the three-way pipeline 8, and the fresh medium 30 which flows afterwards flows into the sampling cavity from the upper outlet of the three-way pipeline 8 under the action of self-pressure. Only one sampling action is used, so that the medium 29 remained in the previous measurement is quantitatively and accurately eliminated, the isolation of new and old media is realized, and the sampling is completed.
The invention has the following beneficial effects:
1. simulating a manual sampling measurement environment, automatically taking a medium into a measurement cavity equivalent to an opening, measuring under normal pressure, and enabling a pH electrode to work under the normal pressure environment forever.
2. Program control and full-automatic measurement.
3. After measurement, the pH electrode is automatically cleaned by clear water, and after cleaning, the pH electrode is soaked in the clear water, so that the pH electrode is prevented from being polluted due to long-time contact with a measured medium.
4. The last measurement retention medium 29 in the sampling tube is automatically and quantitatively emptied only by sampling once, and the fresh medium 30 flowing through the sampling tube is completely isolated from the last measurement retention medium 29, so that cross contamination is avoided, and the real-time performance and the accuracy of a measurement result are ensured.
5. The high liquid level of the sampling cavity and the low liquid level of the waste water tank are automatically controlled to form a strict dynamic circulation chain. The sample amount and the wastewater discharge amount are small in each measurement, and the workload of a wastewater discharge or recovery device is reduced.
6. The device is miniaturized, the sampling quantity of single measurement is generally not more than 1000 ml, and the occupied space volume of the module body is not more than phi 220X330 mm.
7. The measuring cavity and the waste water tank are visible, so that the internal running state and maintenance are conveniently observed.
The pH electrode and sampling cavity cleaning structure is specially designed, an annular water curtain is arranged, no dead angle exists in the 360-degree full circumferential direction, a cleaning water path is smooth, the whole sampling cavity wading surface can be sprayed and cleaned by pressurized water instead of simple flowing-through type washing, and the washing is clean, so that the pH electrode and sampling cavity cleaning structure is an important factor for ensuring the successful application of the invention.
Drawings
FIG. 1 shows a general pH value on-line measuring device;
FIG. 2 shows an open type pH value on-line measuring and automatic cleaning device;
FIG. 3 is a top view of the annular nozzle.
The components in the figure: 1: producing a process water pipeline; 2: short-circuit connection; 3: a pH electrode; 4: a pH meter; 5: an instrument bus; 6: a sampling tube; 7: a sampling control valve; 8: a three-way pipeline; 9: the sampling liquid level is floated; 10: a communicating pipe; 11: a wastewater level trigger lever; 12: a wastewater tank low level switch; 13: a sampling liquid level trigger lever; 14: a sampling high liquid level switch; 15: a sampling cavity cover; 16: a transparent circular tube; 17: an annular nozzle; 18: cleaning the control valve; 19: washing water inlet, 20: a communicating vessel; 21: a transparent thick circular tube; 22: a wastewater tank base; 23: a waste water discharge port; 24: a drain control valve; 25: the wastewater liquid level floats; 26: conical blocking; 27: . A wastewater overflow port; 28: a box body; 29: last measurement of the retained medium; 30: fresh medium; 31: a middle small spray hole; 32: and (4) an annular water spraying hole.
Detailed Description
The invention is further explained below with reference to the figures and the examples.
As shown in FIG. 2, the invention is composed of a sampling cavity cover 15, a transparent circular tube 16 and a communicating vessel 20 which are fixedly connected by sealing to form a sampling cavity; the communicating vessel 20, the transparent thick circular tube 21 and the waste water tank base 22 are fixedly connected through sealing to form a waste water tank; the sampling cavity and the waste water tank are fixedly connected into a main body frame which is communicated up and down in a sealing way through a communicating vessel 20.
A pH electrode screw thread connection outlet is arranged at the middle position of the sampling cavity cover 15, and the pH electrode 3 extends into the sampling cavity from the connection outlet and is screwed and fixed through screw threads.
The design has 2 vertical direction through-holes on the sample chamber lid 15, and its effect has: 1) the sampling liquid level trigger rod 13 is matched with the sampling liquid level trigger rod 13, so that the sampling liquid level trigger rod 13 can only automatically slide up and down in three moving dimensions and cannot transversely move, and the sampling liquid level trigger rod not only plays a role in triggering a sampling high liquid level switch 14, but also plays a role in transversely positioning a sampling liquid level float 9; 2) the gap between the guide hole and the sampling liquid level trigger switch enables the sampling cavity to be communicated with the external space through air, so that the sampling cavity is equivalent to an open cup, and the sampling cavity and the open cup are taken manually to take samples to achieve the same effect.
An L-shaped overflow pipe is designed on the sampling cavity cover 15, and the pipe enters from the lower surface of the sampling cavity cover 15 and exits from the right side surface of the sampling cavity cover 15.
The communicating pipe 10 is a three-way tubular structure. The left outlet of the communicating pipe 10 is fixedly connected with the right overflow port of the sampling cavity cover. The lower outlet of the communicating pipe 10 is fixedly connected with the guide hole at the upper right portion of the communicating vessel 20. The upper portion of the communication pipe 10 is opened. The wastewater level trigger rod 11 penetrates through the interior of the communicating pipe and extends upwards. Communication pipe 10 functions to: 1) when the liquid level of the sampling cavity is out of control, the medium flows out from the overflow port and flows to the wastewater tank through the annular gap between the wastewater liquid level trigger rod 11 and the inner wall of the communicating pipe 10. 2) The communicating pipe 10 is matched with the wastewater liquid level trigger rod 11, so that the wastewater liquid level trigger rod 11 can only automatically slide up and down in three moving dimensions, but cannot transversely move, namely, the wastewater tank low liquid level switch 12 can be triggered, and the wastewater float 25 is positioned.
The lower surface of the sampling cavity cover 15 is designed into a radial circular ring surface, which is equivalent to a hollow circular ring, and the inner surface of the remaining upper half part is cut off at the lower half part along the horizontal direction. The design is to ensure the smooth injection of the cleaning water and form a horn-shaped annular water curtain.
The sampling liquid level float 9 is an annular structure with an approximately rectangular section, is made of light plastic materials with specific gravity lower than that of water, is hollow in the interior design for increasing buoyancy, and can float up and down under the buoyancy action of water. The inner annular space of the sampling liquid level float 9 is used for arranging the pH electrode 3 and forming a cleaning water channel.
Sample liquid level trigger bar 13 is total 2, all fixes on sample liquid level is cursory 9, cursory 9 component interlock mechanisms of liquid level with the sample, and its effect has: 1) through 2 vertical guiding holes cooperation with sample on the chamber lid 15, play the guide effect, guarantee that sample liquid level is cursory 9 can be from top to bottom free floating, can also give sample liquid level cursory 9 transverse orientation, make cursory remain throughout at sample chamber intermediate position to in with the 16 inside wall contacts of transparent pipe, hinder sample liquid level cursory 9 free floating from top to bottom. 2) Left sample liquid level trigger bar 13 still has the effect of triggering sample high liquid level switch 14, and along with the sample liquid level rises, sample liquid level cursory 9 and sample liquid level trigger bar 13 are the interlock together and rise under the effect of buoyancy, and when the sample liquid level rises to the settlement height, sample liquid level trigger bar 13 triggers sample high liquid level switch 14, stops the sample.
A gap is reserved between the inner ring surface of the sampling liquid level float 9 and the outer ring surface of the pH electrode 3. A gap is reserved between the outer annular surface of the sampling liquid level float 9 and the inner annular surface of the transparent circular tube 16. The sampling liquid level floats 9 are completely independent, the upper part and the lower part are prevented from being blocked when the sampling liquid level floats freely, and the gaps and the lower cambered surface of the sampling cavity cover 15 form an annular radial water spraying channel together.
The connector 20 serves to connect the sampling chamber and the waste water tank. The upper interface of the communicating vessel 20 is designed into a round shape and is fixedly connected with the transparent round tube 16. The lower port of the communicating vessel 20 is designed to be circular and fixedly connected with the transparent thick circular tube 21.
The upper surface of the communicating vessel 20 is designed in the shape of an open cup, and the capacity of the open cup is designed.
A cleaning water pipeline is arranged in the middle of the communicating vessel 20, and the pipeline shown in the figure enters from the left side part and exits from the center of the upper part of the communicating vessel. The left outlet of the cleaning water pipeline is fixedly connected with a cleaning control valve 18, and the upper outlet of the cleaning water pipeline is fixedly connected with an annular nozzle 17. The clean water flows in through the cleaning water inlet 19 by self pressure, and is sprayed upwards through the cleaning water pipeline in the communicating vessel by the annular nozzle 17 to clean the pH electrode 3 and the whole sampling cavity.
As shown in fig. 3, a small water spraying hole is formed in the middle of the annular nozzle 17, the small water spraying hole is directed upward to the lower end of the pH electrode 3, and the water column sprayed out of the small water spraying hole is mainly responsible for cleaning the sensitive glass film of the pH electrode 3. The outer side of the middle small round hole is provided with a round water spraying ring, and the water spraying ring is directly opposite to the gap between the outer ring surface of the pH electrode 3 and the inner ring surface of the sampling liquid level float 9 in the upward direction. When water is sprayed, the annular water curtain vertically sprayed upwards by the water spraying ring is sprayed to the lower ring surface of the sampling cavity cover 15 through the gap between the pH electrode 3 and the sampling liquid level buoy 9, and is sprayed to the gap between the inner ring surface of the transparent circular tube 16 and the outer ring surface of the sampling liquid level buoy 9 after continuous refraction of the lower ring surface of the sampling cavity cover 15, and then returns to the bottom of the sampling cavity and flows to the wastewater tank through the three-way pipeline 8. The annular nozzle 17 functions to: the middle small round hole can be specially cleaned to the pH electrode; 2) the annular water curtain can wash all the solid surfaces which are contacted with the medium in the sampling cavity from 360 degrees, and the washing structure is symmetrical without dead angles.
The middle of the communicating vessel 20 is also provided with a sampling pipeline, the pipeline enters from the right side part and forms a three-way pipeline 8 with the vertical pipeline in the communicating vessel 20. The three-way pipeline 8 is communicated with the sampling cavity upwards. The three-way pipeline 8 is communicated with the waste water tank downwards, and the lower outlet is designed into a lower conical surface which is just matched with the upper conical surface of the conical plug 26. The three-way pipeline 8 is connected with the sampling control valve 7 through the sampling pipe 6 rightwards and then is connected to the production process water pipeline 1 through the sampling pipe 6.
The communicating vessel 20 is further provided with 2 guiding holes. Wherein, the left side guiding hole is the blind hole, cooperates with the short waste water liquid level trigger lever 11 on the left on waste water liquid level cursory 25, plays the cursory guide action of floating from top to bottom of giving waste water liquid level and gives waste water liquid level cursory horizontal orientation effect. The right side guiding hole with communicate 10 fixed connection, the long waste water liquid level trigger bar 11 on the right side on waste water liquid level cursory 25 upwards stretches out through right side guiding hole and communicating 10 insides, plays for waste water liquid level cursory unsteady guide effect from top to bottom and gives waste water liquid level cursory lateral positioning effect, supplies waste water liquid level trigger bar 11 freely to pass through in addition, goes to trigger the low liquid level switch 12 of waste water tank.
The right upper part of the communicating vessel 20 is provided with a waste water overflow port 27 which is led out of the tank body 28 through a pipeline, and when the liquid level of the waste water tank is out of control, the waste water flows out of the tank body through the overflow port.
The wastewater level float 25 is made of light plastic with specific gravity smaller than that of water, can be made into a hollow structure for increasing buoyancy, and can float up and down under the buoyancy action of water. Waste water liquid level trigger bar 11 is total 2, all fixes on waste water liquid level cursory 25 to can reciprocate in 2 vertical guiding holes that the linker 20 inside was equipped with. 2 individual waste water liquid level trigger bars 11 all have for the cursory 25 guide effect that floats from top to bottom of waste water liquid level and give the cursory 25 transverse orientation effect of waste water liquid level, make it remain throughout at the waste water tank intermediate position to avoid with the contact of the 21 inside walls of transparent thick pipe, hinder the cursory 25 free floating from top to bottom of waste water liquid level. Wherein, the right wastewater liquid level trigger rod 11 extends upwards to the upper part of the sampling cavity cover 15 through the inside of the communicating pipe 10, and has the function of triggering the wastewater tank low liquid level switch 12. Along with the decline of waste water tank liquid level, waste water liquid level buoy 25 and waste water liquid level trigger lever 11 are the interlock descends together under the effect of buoyancy, and waste water tank low level switch 12 also slides down under the action of gravity, and when the waste water liquid level dropped to the settlement height, waste water tank low level switch 12 slided down to effective position, stops waste water discharge.
A conical plug 26 is fixed at the center of the upper part of the wastewater liquid level float 25, the conical plug 26 is right opposite to the lower conical opening of the three-way pipeline 8 in the communicating vessel, and the conical surface of the conical plug 26 is just fit with the lower conical opening of the three-way pipeline 8. Along with the rising of waste water tank liquid level, waste water liquid level buoy 25, waste water liquid level trigger lever 11, toper are stifled the interlock and are risen, and when the liquid level rose to a take the altitude, the toper was stifled the lower mouth of blocking tee bend pipeline 8, made the sample that flows over by the sampling tube flow no longer to the waste water tank, but flowed into the sample chamber through tee bend pipeline 8's last export.
A waste water discharge port is formed in the waste water tank base 22, the waste water discharge port is hermetically connected with the waste water control valve 24, and after the waste water control valve 24 is opened, waste water flows out through the waste water discharge port 23 by self weight.
The whole set of open type pH value on-line measuring and automatic cleaning device can be integrated into a whole and is integrally installed and fixed in the box body 28 as a module.
Referring to fig. 1, a pH meter 4 is integrally installed in a case. One end of the pH meter 4 is connected with a pH electrode for measuring the pH value of the medium, and the other end of the pH meter 4 is connected with an instrument bus 5 and is connected to an indoor monitoring computer through the instrument bus 5. The instrument bus 5 also contains 5 paths of I/O switching value signals, three paths of I/O switching value signals are used for controlling the switches of the sampling control valve 7, the cleaning control valve 18 and the drain control valve 24, and 2 paths of I/O switching value signals are used for receiving action signals of the waste water tank low liquid level switch 12 and the sampling cavity high liquid level switch 14. The system is a set of products.
The working process is as follows:
the device initialization settings are as follows:
the volume of the retention medium 29 of the previous measurement in the sampling tube 6 is calculated based on the inner diameter and length of the sampling tube 6. And adjusting the upper position and the lower position of a low liquid level switch of the waste water tank to enable the reserved space in the waste water tank to be slightly larger than the total amount of the reserved medium 29 measured last time. During sampling, after the retained medium 29 is completely measured and flows into the wastewater tank last time, the conical plug 26 blocks the lower outlet of the three-way pipeline 8, so that the fresh medium 30 flowing through the lower outlet of the three-way pipeline 8 flows upwards into the sampling cavity through the three-way pipeline 8.
The sampling control valve 7, the purge control valve 18, and the drain control valve 24 are all closed.
The sample liquid level cursory 9 depends on gravity to fall on the opening cup on communicating vessel 20 upper portion, makes sample liquid level trigger bar 13 upper end just in time contact sample high liquid level switch 14, connects the back full at the opening cup on communicating vessel upper portion, and sample liquid level cursory 9 just rises and just triggers sample high liquid level switch 14, stops the sample, guarantees the sampling volume of measuring each time.
The time interval between the two measurements is set.
One measurement cycle step is as follows:
the program opens the sampling control valve 7 and the medium in the production process water pipeline 1 flows to the communicating vessel 20 by self-pressure. Due to the action of gravity, the sampling medium which flows firstly flows downwards into the waste water tank through the three-way pipeline 8. According to the initialization setting, after the reserved medium 29 completely flows into the waste water tank in the last measurement and a little fresh medium 30 flows into the waste water tank, the conical plug 26 blocks the lower outlet of the three-way pipeline 8, so that the new medium and the old medium are completely isolated. The fresh medium flowing back flows into the sampling cavity through the upper outlet of the three-way pipeline 8.
After the open cup at the upper part of the communicating vessel 20 is filled, the sampling liquid level buoy 9 starts to be acted by buoyancy. As the liquid level rises, the buoyancy increases, a sampling high liquid level switch 14 is triggered just after the sampling liquid level buoy 9 rises, and the program closes the sampling control valve 7 to stop sampling.
The on-line pH meter 4 starts to measure the pH value through the pH electrode 3, and the measured result is uploaded to the indoor monitor through the instrument bus 5 in real time.
After the measurement is completed, the drain control valve 24 is opened, and the wastewater in the wastewater tank flows out through the wastewater discharge port 23. Along with the liquid level in the waste water tank descends, the waste water liquid level buoy 25 descends by the dead weight, the conical plug 26 is separated from the lower outlet of the three-way pipeline 8, and the medium in the sampling cavity flows into the waste water tank by the dead weight. After the medium in the sampling cavity is emptied and the liquid level of the wastewater tank is reduced to the initial set liquid level, the upper wastewater tank low liquid level switch 12 of the wastewater liquid level trigger lever 11 slides down to the effective position, and the drainage control valve 24 is closed by a program.
The program opens the cleaning control valve 18, and the cleaning water flows in from the cleaning water inlet 19 by its own pressure, passes through the cleaning pipe line in the communicating vessel, and is ejected upward from the ring nozzle 17. The middle small spray hole of the annular nozzle 17 mainly cleans the pH electrode 3. The annular nozzle on the annular nozzle 17 sprays an annular water curtain upwards. The annular water curtain is projected to the lower projection-shaped arc surface of the sampling cavity cover 15 through a gap between the outer ring surface of the pH electrode 3 and the inner ring surface of the sampling liquid level floater 9, is projected to the periphery in 360 degrees after being refracted by the arc surface, and flows back to the bottom of the sampling cavity through a gap between the outer ring surface of the sampling liquid level floater 9 and the inner ring surface of the transparent circular tube 16.
The cleaning water firstly flows into the waste water tank through the three-way pipeline 8 by the dead weight, the liquid level of the waste water rises to the conical plug 26 to block the lower outlet of the three-way pipeline 8, then the cleaning water level in the sampling cavity rises until the sampling liquid level buoy 9 floats upwards, the sampling high liquid level switch 14 is triggered, the cleaning control valve 18 is closed by a program, and the cleaning is stopped.
The pH electrode 3 is immersed in the washing water and the program starts to wait according to the time interval between the two measurements.
After the waiting time is reached, the program opens the drain control valve 24 and the wastewater tank level drops in conjunction with the sampling chamber level. After the sampling chamber cleaning water is completely emptied and the liquid level of the wastewater tank drops to the set liquid level, the wastewater low liquid level switch 12 is triggered, the drainage control valve 24 is closed by a program, and wastewater drainage is stopped.
After the wastewater discharge is stopped, the program waits for a fixed time to completely drip the residual water on the inner wall of the sampling cavity.
After one measurement cycle is finished and the set time is reached, the program starts the next measurement.
Meanwhile, when the sampling control valve 7 and the cleaning control valve 18 are not closed tightly or the liquid level of the sampling cavity is ultrahigh due to large medium flow velocity, water flows to the waste water tank from an overflow port on the sampling cavity cover through the communicating pipe 10. Similarly, when the wastewater tank is at an ultra-high level, the media will be directed from the wastewater overflow to the desired location, and the walls will be free of media flowing into the tank 28.
Claims (10)
1. The utility model provides an open pH value on-line measurement and self-cleaning device which characterized in that: the device is including sample chamber and waste water chamber, the pH meter is placed to the sample intracavity, sample chamber bottom is equipped with belt cleaning device, belt cleaning device can wash the pH meter, sample chamber links to each other through sampling tube (6) with production process water pipeline (1), sample chamber liquid outlet is equipped with the plugging device that can open and shut, the sample chamber links to each other with the waste water chamber, waste water chamber bottom is equipped with waste water outlet (23), sample chamber, waste water chamber are open.
2. The open type online pH value measuring and automatic cleaning device according to claim 1, wherein: the sampling cavity is internally provided with a sampling liquid level buoy (9), and the sampling liquid level buoy (9) is sleeved outside the pH meter and can move up and down relative to the pH meter.
3. The open type online pH measuring and automatic cleaning device according to claim 2, wherein: and a gap is reserved between the sampling liquid level buoy (9) and the pH meter and the side wall.
4. The open type pH value on-line measuring and automatic cleaning device according to claim 2 or 3, wherein: sample chamber top is equipped with sample chamber lid (15), sample chamber lid (15) central point puts and opens and has pH electrode (3) hickey, and pH electrode (3) insert the sample intracavity through hickey, it has two guiding holes to open on sample chamber lid (15), and sample liquid level floats to be equipped with two sample liquid level trigger bars (13) on (9), and sample liquid level trigger bar (13) pass and with guiding hole clearance fit in following the guiding hole, sample liquid level trigger bar (13) and sample liquid level switch (14) touching contact, and it has the overflow pipeline to open on sample chamber lid (15), and the overflow pipeline export is drawn forth from sample chamber lid lateral wall.
5. The open type pH value on-line measuring and automatic cleaning device according to claim 4, wherein: and hemispherical spherical surfaces are arranged on the lower surface of the sampling cavity cover (15) at two sides of the pH meter.
6. The open type online pH value measuring and automatic cleaning device according to claim 1, wherein: the cleaning device is just opposite to the lower part of the pH meter, the cleaning device is an annular nozzle (17), the annular nozzle (17) is provided with a small middle spray hole (31), an annular water spray hole (32) is formed in the outer circle of the annular nozzle, and the cleaning device is connected with a cleaning control valve and a clean water pipeline.
7. The open type online pH value measuring and automatic cleaning device according to claim 1, wherein: the sampling cavity is connected with the waste water cavity through a communicating vessel (20), a three-way pipeline (8) is arranged in the communicating vessel (20), an upper outlet of the three-way pipeline (8) is communicated with the sampling cavity, a lower outlet of the three-way pipeline (8) is communicated with the waste water tank, and a side outlet of the three-way pipeline (8) is connected with a sampling pipe (6) through a sampling control valve (7).
8. The open-type online pH measuring and automatic cleaning device according to claim 7, wherein: the waste water intracavity is equipped with that the waste water liquid level floats (25), is equipped with waste water liquid level trigger bar (11) and toper on it and blocks up (26), the lower export of tee bend pipeline (8) is the conical surface form, agrees with mutually with the last conical surface that toper was stifled (26), be equipped with waste water liquid level trigger bar guide way in linker (20), waste water liquid level trigger bar (11) and this guide way clearance fit, but waste water liquid level trigger bar (11) and waste water tank low level switch (12) touching contact.
9. The open-type online pH measuring and automatic cleaning device according to claim 8, wherein: the waste water cavity is provided with a waste water overflow port (27), and the waste water overflow port (27) is led out of the box body (28) through a pipeline.
10. The open type pH value on-line measuring and automatic cleaning device according to claim 5 or 7, wherein: the sampling cavity cover (15) is connected with a communicating vessel (20) through a transparent round tube (16), and the communicating vessel (20) is connected with a waste water tank base (22) through a transparent thick round tube (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063759.3A CN111220664A (en) | 2019-11-04 | 2019-11-04 | Open type pH value on-line measurement and automatic cleaning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911063759.3A CN111220664A (en) | 2019-11-04 | 2019-11-04 | Open type pH value on-line measurement and automatic cleaning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111220664A true CN111220664A (en) | 2020-06-02 |
Family
ID=70829173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911063759.3A Withdrawn CN111220664A (en) | 2019-11-04 | 2019-11-04 | Open type pH value on-line measurement and automatic cleaning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111220664A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7700335L (en) * | 1976-01-20 | 1977-07-21 | Anthony Alain | DEVICE FOR EMPTYING WASTE PRODUCTS |
| JPH05164736A (en) * | 1991-10-14 | 1993-06-29 | Yokogawa Electric Corp | Ph meter fitted with ph sensor calibration part |
| US20020050460A1 (en) * | 1999-03-04 | 2002-05-02 | Lagreca Alfred J. | Method and apparatus for calibrating a pH meter |
| CN101458224A (en) * | 2009-01-06 | 2009-06-17 | 大连华城电子有限公司 | On-line cleaner for environment protection desulphurization PH value detector |
| CN102706943A (en) * | 2012-06-01 | 2012-10-03 | 轻工业环境保护研究所 | Cleaning device for pH meter and cleaning method thereof |
| CN204188561U (en) * | 2014-11-21 | 2015-03-04 | 沈阳中科韦尔腐蚀控制技术有限公司 | A kind of novel pH electrode on-line auto-cleaning device |
| CN106066382A (en) * | 2016-07-04 | 2016-11-02 | 新疆电力建设调试所 | PH value parameter measuring device |
| JP2017075883A (en) * | 2015-10-16 | 2017-04-20 | Ｊｆｅアドバンテック株式会社 | Washing apparatus, and washing method for immersion type detectors |
| CN206930617U (en) * | 2017-07-28 | 2018-01-26 | 衢州市鼎盛化工科技有限公司 | The online PH detectors and its detecting system of automatic cleaning electrode |
| CN211122650U (en) * | 2019-11-04 | 2020-07-28 | 沈阳中科韦尔腐蚀控制技术有限公司 | Open type pH value on-line measurement and automatic cleaning device |
-
2019
- 2019-11-04 CN CN201911063759.3A patent/CN111220664A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE7700335L (en) * | 1976-01-20 | 1977-07-21 | Anthony Alain | DEVICE FOR EMPTYING WASTE PRODUCTS |
| JPH05164736A (en) * | 1991-10-14 | 1993-06-29 | Yokogawa Electric Corp | Ph meter fitted with ph sensor calibration part |
| US20020050460A1 (en) * | 1999-03-04 | 2002-05-02 | Lagreca Alfred J. | Method and apparatus for calibrating a pH meter |
| CN101458224A (en) * | 2009-01-06 | 2009-06-17 | 大连华城电子有限公司 | On-line cleaner for environment protection desulphurization PH value detector |
| CN102706943A (en) * | 2012-06-01 | 2012-10-03 | 轻工业环境保护研究所 | Cleaning device for pH meter and cleaning method thereof |
| CN204188561U (en) * | 2014-11-21 | 2015-03-04 | 沈阳中科韦尔腐蚀控制技术有限公司 | A kind of novel pH electrode on-line auto-cleaning device |
| JP2017075883A (en) * | 2015-10-16 | 2017-04-20 | Ｊｆｅアドバンテック株式会社 | Washing apparatus, and washing method for immersion type detectors |
| CN106066382A (en) * | 2016-07-04 | 2016-11-02 | 新疆电力建设调试所 | PH value parameter measuring device |
| CN206930617U (en) * | 2017-07-28 | 2018-01-26 | 衢州市鼎盛化工科技有限公司 | The online PH detectors and its detecting system of automatic cleaning electrode |
| CN211122650U (en) * | 2019-11-04 | 2020-07-28 | 沈阳中科韦尔腐蚀控制技术有限公司 | Open type pH value on-line measurement and automatic cleaning device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN211122650U (en) | Open type pH value on-line measurement and automatic cleaning device | |
| CN102175622B (en) | Method and device for detecting automatic sample injection of laboratory liquid | |
| CN208995124U (en) | Water purification storage tank and water purifier | |
| CN203178290U (en) | Full-automatic biochemical ionic analysis liquid path system | |
| CN111220664A (en) | Open type pH value on-line measurement and automatic cleaning device | |
| CN208799806U (en) | A kind of oil resistance drainage arrangement | |
| CN112782419A (en) | Metering and dosing method for reagent of analyzer | |
| CN209173436U (en) | A kind of floating ball quantizer | |
| CN2222350Y (en) | Water quality on-line automatic tester | |
| CN201188014Y (en) | Anticorrosion fluid metering apparatus | |
| CN209270892U (en) | A kind of accurate separator of chemical waste liquid | |
| CN212722597U (en) | Sewage on-line monitoring device based on spectral analysis | |
| CN219455841U (en) | Closed Baume degree detection device | |
| CN208916794U (en) | A kind of definite quantity filling valve | |
| CN209123953U (en) | A kind of analysis liquid relief auxiliary device | |
| CN207278249U (en) | A kind of quick oil-water metering device | |
| CN207300661U (en) | A kind of efficient sounding bottle | |
| CN201434862Y (en) | Switching gate valve for taking liquid of water quality online automatic detector | |
| CN204788589U (en) | First -class standard metal measurer | |
| CN104897251A (en) | First-class standard metal measure | |
| CN214408230U (en) | Defoaming device for sampling system of turbidity on-line monitoring analyzer | |
| CN201156034Y (en) | Water quality measuring instrument | |
| RU2483795C2 (en) | Multi-position valveless dispenser | |
| CN208636095U (en) | The complete airborne hydrophore of water route rinse of coiled | |
| CN219084488U (en) | Sampling frame, medicine adding frame and detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200602 |
|
| WW01 | Invention patent application withdrawn after publication |