CN114088649A - Water quality monitoring device for preventing sample crosstalk and detection method - Google Patents
Water quality monitoring device for preventing sample crosstalk and detection method Download PDFInfo
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- CN114088649A CN114088649A CN202210057906.1A CN202210057906A CN114088649A CN 114088649 A CN114088649 A CN 114088649A CN 202210057906 A CN202210057906 A CN 202210057906A CN 114088649 A CN114088649 A CN 114088649A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N1/14—Suction devices, e.g. pumps; Ejector devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
Abstract
The invention discloses a water quality monitoring device for preventing sample crosstalk and a detection method, wherein the water quality monitoring device comprises a shell, a sampling device, a homogenizing device and a separating device, the shell is connected with the sampling device, the sampling device is fixedly connected with the homogenizing device, the separating device is communicated with the shell, the shell is provided with a sampling groove, a sampling bottle is arranged in the sampling groove, the shell is provided with a detection cavity, the detection cavity is positioned at the upper side of the sampling groove, the sampling device comprises a water drawing pipe and a detection assembly, the upper end of the water drawing pipe is communicated with the detection cavity, the detection assembly is arranged in the detection cavity, the detection assembly comprises a detection plate, a light source plate and an injection pump, the detection plate and the light source plate are symmetrically arranged along the detection cavity, the output end of the injection pump is communicated with the detection cavity, and an original conveying passage is cleaned by clean water to prevent the sample crosstalk from occurring, so that the detection precision is influenced.
Description
Technical Field
The invention relates to the technical field of water quality monitoring, in particular to a water quality monitoring device and a water quality monitoring method for preventing sample crosstalk.
Background
The ammonia nitrogen in the water is mostly ammonia existing in the form of free ammonia or ammonium salt, the pollution degree of organic matters in the water is mainly based on the content of nitrogen compounds, and the pollution degree of the water body is detected by measuring the content of the nitrogen compounds.
However, when the salt concentration in the water sample to be detected is high, the salt is easy to precipitate and precipitate due to environmental fluctuation and temperature fluctuation, and when sampling is performed, the water sample to be detected is mostly filled into a sampling bottle, and then the water sample in the sampling bottle is sampled and detected. Because the detection capacity is limited, only partial water sample is drawn, when salt substances are precipitated at the bottom end of the sampling bottle, the sample drawn through the pipeline cannot uniformly sample precipitated salt, so that inaccurate sampling is easily caused, and the sampling precision is influenced.
In addition, ammonia nitrogen detection is mostly performed by an electrode method or a photometric method, and when the ammonia nitrogen detection is performed by the photometric method, precipitated salts easily influence absorbance detection, so that detection accuracy is influenced. In order to satisfy short-term test and detect the precision demand, need often clean the detection water route, prevent that different concentration water samples from causing crosstalk, and the composition in order to prevent the outside air from getting into the detection space and causing, detection space often airtight setting, inconvenient clearance can influence detection efficiency.
Disclosure of Invention
The invention aims to provide a water quality monitoring device and a water quality monitoring method for preventing sample crosstalk, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme:
the utility model provides a prevent water quality monitoring device of sample crosstalk, which comprises a housin, sampling device, homogenization device and separator, casing and sampling device connect, sampling device and homogenization device fastening connection, separator and casing intercommunication, be equipped with the sample groove on the casing, the sample bottle is arranged in the sample groove, be equipped with the detection chamber on the casing, the detection chamber is located the sample groove upside, sampling device is including drawing water pipe and determine module, draw water pipe upper end and detection chamber intercommunication, determine module arranges the detection intracavity in, determine module includes the probe plate, light source board and syringe pump, probe plate and light source board are along detecting chamber symmetrical arrangement, syringe pump output end and detection chamber intercommunication.
The shell is a main installation foundation, other devices are installed, a water sample is homogenized through the homogenizing device, the water sample is collected and detected through the sampling device, the detected water sample is separated through the separating device, partial salts are separated out, water is evaporated to form clean water, an original conveying passage is cleaned through the clean water to prevent the water sample from crosstalk, so that the detection precision is influenced, the detection cavity is a main detection space, the sampling bottle is fixed through the sampling groove, the detection cavity is arranged on the upper side of the sampling groove and is used for drawing the water sample through the water drawing pipe, free ammonia and ammonium salt are detected through the detection assembly, when detection is carried out, the injection pump is started, relevant reagents are injected into the detection cavity, the light source plate and the detection plate are opened, the light source plate provides an initial light source, light absorption is carried out through water sample screening, different absorbances are measured on the detection plate, thereby calculating the ammonia nitrogen concentration in the water sample.
Furthermore, the lower end of the water drawing pipe extends into the sampling groove, the lower end of the water drawing pipe is provided with a homogenizing device, the homogenizing device is arranged in the sampling bottle, the homogenizing device comprises a fixed seat and a stirring wheel, driving motor and kickboard, the fixing base is connected with drawing water pipe fastening, be equipped with the feed liquor way on the fixing base, the feed liquor way import is towards the sample bottle, the feed liquor way export with draw water pipe intercommunication, be equipped with the rotary trough on the fixing base, be equipped with the revolving axle on the stirring wheel, revolving axle both ends and rotary trough swing joint, rotary trough one side is equipped with the mounting groove, driving motor arranges in the mounting groove, driving motor output and revolving axle transmission are connected, driving motor frame and mounting groove sliding connection, the wall under the rotary trough is arranged in to the kickboard, the kickboard upside is equipped with the draw-in groove, the inside lateral wall of draw-in groove is equipped with the friction surface, the kickboard passes through friction surface and revolving axle contact, the inside cavity of revolving axle sets up, be equipped with the skew clearance between revolving axle upside and the rotary trough upper wall.
The water sample is drawn through a water drawing pipe, the homogenizing device is arranged in a sampling bottle, a water sample uniformly mixed by the homogenizing device is conveyed through the water drawing pipe, a fixing seat is installed through the water drawing pipe, the fixing seat supports a rotating shaft at two ends through a rotating groove, a stirring wheel is arranged on the outer ring of the rotating shaft and stirs the water sample through an outer paddle, so that the bottom end of the sampling bottle is precipitated and floated, the homogenizing device is uniformly mixed with the water sample, a driving motor is installed through a mounting groove and drives the rotating shaft to move downwards through self weight, so that the paddle of the stirring wheel extends into the water sample of the sampling bottle, the driving motor outputs torque to drive the rotating shaft to rotate, so as to drive the stirring wheel to rotate, stir the water sample in the sampling bottle, homogenize the water sample, improve the uniform mixing degree of the water sample, reduce detection errors caused by salt precipitation due to temperature change, and support the rotating shaft in an auxiliary way through a floating plate, the floating plate is in friction contact with the lower side wall surface of the rotating shaft through the friction surface of the inner wall of the clamping groove, initial gravity is provided through the driving motor, the rotating shaft and the stirring wheel, when different water samples are sampled and detected, different sampling bottles are different in capacity from the water samples in the sampling bottles, the positions of the fixing seats are relatively fixed, the rotating shaft is internally hollow, the buoyancy generated by the water samples with different heights to the rotating shaft is different, when the water sample capacity is small, the buoyancy borne by the stirring wheel is small, the friction force between the rotating shaft and the friction surface of the floating plate is large, the driving motor outputs rated power, most of power is converted into internal friction energy, so that the rotating speed of the stirring wheel is reduced, the rotating speed is too high when the water samples are small, liquid splashing is caused, the detection precision is affected, when the water sample capacity is large, the buoyancy obtained by the inner space of the rotating shaft of the stirring wheel is increased, and the rotating shaft is enabled to overcome the dead weight of the driving motor and the stirring wheel to float, along with pressure reduces, revolving axle and kickboard frictional force reduce, and driving motor output rated power makes the increase of stirring wheel rotational speed to make the stirring wheel drive the rapid disturbance of water sample in the sample bottle, carry out quick homogenization, according to different water sample capacities, automatically regulated homogenization time, thereby improve water sample homogenization efficiency, reduce check-out time.
Furthermore, the sampling device further comprises a sampling pump and a negative pressure pipe, the sampling pump is arranged at the communication position of the water drawing pipe and the detection cavity, the sampling pump is communicated with the liquid inlet channel through the water drawing pipe, one end of the negative pressure pipe is communicated with the detection cavity, a separation flow channel is arranged on one side of the detection cavity, the separation device comprises a liquid collection chamber, a separation cavity is arranged on the liquid collection chamber, the separation cavity is communicated with the separation flow channel, and an opening and closing valve is arranged on the separation flow channel.
Through sample pump and draw water pipe intercommunication, produce the negative pressure at the entrance point, through draw water pipe and feed liquor way intercommunication, thereby pump the water sample into the detection chamber, sample pump servo control, carry out the ration sample, improve and detect the precision, negative pressure pipe and detection chamber intercommunication, produce the negative pressure in detecting the intracavity, the negative pressure pipe mouth of pipe sets up filter paper, prevent that the water sample from revealing, thereby make and detect intracavity pressure reduction, improve the salt saturation concentration in the water sample, make the salt class that separates out dissolve in the water sample again, rethread injection pump injection reagent detects, improve and detect the precision, accomplish and detect the back, directly carry the separation intracavity of collecting chamber through the water sample after detecting the separation runner, through the break-make of open-close valve control separation runner, thereby carry out quick flowing back, improve detection efficiency.
Further, sampling device still includes the high-pressure pipe, and high-pressure pipe and disengagement chamber intercommunication, separator still include heating rod and condensing plate, and the disengagement chamber upside is equipped with the liquid outlet, is equipped with the backward flow way on the casing, and the backward flow way both ends communicate with separation runner and liquid outlet respectively, and the disengagement intracavity is arranged in to the heating rod, and the condensing plate is arranged in the backward flow way.
The water in the water sample is evaporated through the heating stick, salt substances are separated out along with the reduction of water amount, the water sample is pressurized through the high-pressure pipe, the separation amount of partial salts is improved, the purity of the evaporated water is improved, the water vapor gradually moves upwards along with the increase of pressure and flows out of a liquid outlet, the water vapor enters the backflow channel, the water vapor is condensed into liquid water through the condensation plate, the liquid water flows out of the backflow channel, the backflow channel is cleaned, the cleanliness of the separation flow channel is improved, the water sample remained in the separation flow channel is prevented from causing crosstalk to next detection, and the detection precision is improved.
Furthermore, the separating device also comprises a reversing plate, the reversing plate is arranged at the intersection of the separating flow channel and the return channel, the reversing plate is an L-shaped folded plate, a bump is arranged at the folded angle of the reversing plate, a pre-tightening spring is arranged on the outer side of the bump, the reversing plate is rotatably connected with the wall surface of the intersection of the separating flow channel and the return channel through the bump, and two folded edges of the reversing plate are respectively matched with the sizes of the separating flow channel and the return channel.
The two ends of the reversing plate alternately block the separation flow passage and the return flow passage by the L-shaped arrangement of the reversing plate, when the drainage is carried out, the reversing plate enables the upper end to plug the return channel under the action of the pre-tightening spring, so as to prevent the water sample without salt separation from directly entering the return channel, thereby reducing the efficiency of backflow cleaning, causing pollution to the cleaning water and even corrosion to the condensation plate, affecting the service life, when the cleaning water flows out from the backflow passage, along with the increase of pressure, continuously impacting the reversing plate to enable the reversing plate to overcome the elasticity of a pre-tightening spring to rotate, so that the lower end of the reversing plate plugs the junction of the separation flow channel and the return flow channel, clean water flow directly enters the detection cavity through the front section of the diversion flow channel, the inner wall of the detection cavity is cleaned, so that multiple tests are convenient to carry out, sample crosstalk of water samples with different concentrations is prevented, and the detection efficiency is improved.
Furthermore, a V-shaped angle section is arranged on the separation flow channel, the angle of the V-shaped angle section is arranged downwards, the return channel is arranged in an inclined mode, and one end, close to the liquid outlet, of the return channel is located at a high position.
Through the dog-ear section that "V" type set up, make along the clean water that the return channel flows and commutate to detecting the chamber upside blowout along "V" type groove, clean detecting chamber wall from the top down, guarantee to detect chamber wall cleanliness, prevent to take place sample and cross talk, the waste water after the cleanness is discharged along drawing water pipe and feed liquor way in proper order through the sampling pump, thereby clears up whole flow path, improves the clean degree in water route, thereby improves and detects the precision.
As optimization, a charging chute is arranged on the liquid collecting chamber and is communicated with the separation cavity. The separated salt substances are collected through the charging chute, so that the cleaning is convenient, and the scale deposition is prevented.
Further, draw the water pipe and include outer tube and inner tube, outer tube and sample pump input end intercommunication, inner tube and feed liquor way intercommunication, the outer tube lower extreme is equipped with the slide, the slide upside is equipped with the baffle, inner tube and slide sliding connection, the slide downside is equipped with the earial drainage way, the earial drainage way is towards the outer disc of inner tube.
Draw the water pipe and pass through outer tube and inner tube setting, the slide seal setting of inner tube pipe wall and outer tube, when carrying out the water sample and draw, produce the negative pressure in the outer tube, thereby make the inner tube shift up, it is spacing to move on the inner tube through the baffle, jacking spring is established to inner tube upper end outer lane cover, when carrying out the pipeline cleanness, the rivers that the sampling pump was pumped impact the inner tube along the outer tube, make the inner tube overcome jacking spring elasticity and move down, thereby it moves down to drive the inner tube, when the inner tube moved to the bottom, slide and earial drainage way intercommunication, clean water flows along the inner tube outer wall, and carry out self-cleaning to fixing base and lower extreme pipeline, prevent to take place to crosstalk, improve and detect the precision.
A detection method of a water quality monitoring device for preventing sample crosstalk comprises the following steps:
1) drawing a sample; firstly, the sampling pump 22 pumps the water sample, so that part of the water sample flows out of the sampling bottle 5 and enters the detection cavity 11.
2) Dissolving under negative pressure; the negative pressure pipe 24 generates negative pressure in the detection cavity 11, so that the saturated concentration of salt substances is improved, part of precipitated salts are dissolved in the water sample again, and the detection precision is improved.
3) Detecting the concentration; the reagent is injected into the detection chamber 11 by the injection pump, and the light source plate 232 and the detection plate 231 are simultaneously activated, thereby detecting the absorbance of the water sample.
4) Pressurizing, evaporating, separating out crystal, and gas-solid separating; the water in the detected water sample is evaporated by heating, salt substances are separated out, partial salt substances are further separated out by pressurizing to form clean steam, and clean water is formed by condensation.
5) The passage is self-cleaned. Carry out self-cleaning to the sample water route through clean water to insert the part in the sampling bottle to the lower extreme and clean, prevent that the sample from crosstalking, improve and detect the precision.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the driving motor, the rotating shaft and the stirring wheel are used for providing initial gravity, when different water samples are sampled and detected, different sampling bottles and internal water samples are different in capacity, the rotating shaft is internally hollow, the buoyancy generated by the water samples with different heights on the rotating shaft is different, when the water samples are less in capacity, the buoyancy borne by the stirring wheel is smaller, the friction force of the friction surfaces of the rotating shaft and the floating plate is larger, and the driving motor outputs rated power, so that the rotating speed of the stirring wheel is reduced, and the phenomenon that the rotating speed is too high when the water samples are less, so that liquid splashes and the detection precision is influenced is prevented; when the water sample capacity is large, the stirring wheel obtains increased buoyancy through the inner space of the rotating shaft, so that the rotating shaft overcomes the self weight of the driving motor and the stirring wheel to float upwards, the friction force between the rotating shaft and the floating plate is reduced along with the reduction of the pressure, the driving motor outputs rated power, the rotating speed of the stirring wheel is increased, so that the stirring wheel drives the water sample to be rapidly disturbed in the sampling bottle to carry out rapid homogenization, the homogenization time is automatically adjusted according to different water sample capacities, the water sample homogenization efficiency is improved, and the detection time is reduced; the negative pressure tube generates negative pressure in the detection cavity, so that the pressure in the detection cavity is reduced, the saturated concentration of the salts in the water sample is improved, the precipitated salts are dissolved in the water sample again, the interference caused by the precipitated salts is prevented, and the detection precision is improved; the water in the water sample is evaporated through the heating stick, salt substances are separated out along with the reduction of the water amount, the water sample is pressurized through the high-pressure pipe, and the separation amount of partial salts is improved, so that the purity of the evaporated water is improved, the water vapor is condensed into liquid water through the condensing plate, the liquid water flows out of the backflow channel, the backflow channel is cleaned, the cleanliness of the separation flow channel is improved, the water sample remained in the separation flow channel is prevented from causing crosstalk to the next detection, and the detection precision is improved; when carrying out the pipeline clean, the rivers that the sampling pump pumped impact the inner tube along the outer tube, make the inner tube overcome jacking spring elasticity and move down to drive the inner tube and move down, when the inner tube removed the bottommost, slide and earial drainage way intercommunication, clean water flows along the inner tube outer wall, and self-cleaning is carried out fixing base and lower extreme pipeline, prevents to take place to crosstalk.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic diagram of the general structure of the present invention;
FIG. 2 is a half sectional view of the housing, homogenizing device of the present invention;
FIG. 3 is a schematic view of the power transmission configuration of the homogenizing device of the present invention;
FIG. 4 is a cross-sectional view taken along line B-B of the view of FIG. 3;
FIG. 5 is a flow diagram of the waterway self-cleaning of the present invention;
FIG. 6 is a sectional view taken along line A-A of the view of FIG. 2;
FIG. 7 is an enlarged view of portion C of the view of FIG. 2;
FIG. 8 is an enlarged view of a portion D of the view of FIG. 2;
in the figure: 1-shell, 11-detection cavity, 12-separation flow channel, 13-return channel, 2-sampling device, 21-water drawing pipe, 211-outer pipe, 2111-drainage channel, 2112-slideway, 212-inner pipe, 213-baffle plate, 22-sampling pump, 23-detection component, 231-detection plate, 232-light source plate, 24-negative pressure pipe, 25-high pressure pipe, 3-homogenizing device, 31-fixing seat, 311-liquid inlet channel, 312-rotary tank, 313-mounting groove, 32-stirring wheel, 33-driving motor, 34-floating plate, 341-clamping groove, 35-rotary shaft, 4-separation device, 41-heating rod, 42-condensation plate, 43-liquid collecting chamber, 431-blanking groove, 432-liquid outlet, liquid outlet, 433-separation cavity, 44-reversing plate and 5-sampling bottle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides the technical scheme that:
as shown in fig. 1-8, a prevent water quality monitoring device of sample crosstalk, including casing 1, sampling device 2, homogenization device 3 and separator 4, casing 1 and sampling device 2 are connected, sampling device 2 and homogenization device 3 fastening connection, separator 4 and casing 1 intercommunication, be equipped with the sample tank on casing 1, sample bottle 5 is arranged in the sample tank, be equipped with detection chamber 11 on casing 1, detection chamber 11 is located the sample tank upside, sampling device 2 is including drawing water pipe 21 and detection component 23, draw water pipe 21 upper end and detection chamber 11 intercommunication, detection component 23 arranges in detection chamber 11, detection component 23 includes probe plate 231, light source plate 232 and injection pump, probe plate 231 and light source plate 232 arrange along detection chamber 11 symmetry, injection pump output end and detection chamber 11 intercommunication.
The shell 1 is a main installation foundation, other devices are installed, a water sample is homogenized through the homogenizing device 3, the water sample is collected and detected through the sampling device 2, the detected water sample is separated through the separating device 4, partial salts are separated out, water is evaporated to form clean water, an original conveying passage is cleaned through the clean water to prevent the water sample from crosstalk, and therefore detection precision is affected, the detection cavity 11 is a main detection space, the sampling bottle 5 is fixed through the sampling groove, the detection cavity is arranged on the upper side of the sampling groove and is used for drawing the water sample through the water drawing pipe 21, free ammonia and ammonium salt are detected through the detection assembly 23, when detection is carried out, the injection pump is started, relevant reagents are injected into the detection cavity 11, the light source plate 232 and the detection plate 231 are opened, the light source plate provides an initial light source, light absorption is carried out through water sample screening, and measuring different absorbances on the detection plate so as to calculate the ammonia nitrogen concentration in the water sample.
As shown in fig. 1 to 4, the lower end of the water drawing pipe 21 extends into the sampling groove, the lower end of the water drawing pipe 21 is provided with a homogenizing device 3, the homogenizing device 3 is arranged in the sampling bottle 5, the homogenizing device 3 comprises a fixed seat 31, a stirring wheel 32, a driving motor 33 and a floating plate 34, the fixed seat 31 is fixedly connected with the water drawing pipe 21, the fixed seat 31 is provided with a liquid inlet passage 311, the inlet of the liquid inlet passage 311 faces the sampling bottle 5, the outlet of the liquid inlet passage 311 is communicated with the water drawing pipe 21, the fixed seat 31 is provided with a rotating groove 312, the stirring wheel 32 is provided with a rotating shaft 35, two ends of the rotating shaft 35 are movably connected with the rotating groove 312, one side of the rotating groove 312 is provided with a mounting groove 313, the driving motor 33 is arranged in the mounting groove 313, the output end of the driving motor 33 is in transmission connection with the rotating shaft 35, the outer frame of the driving motor 33 is in sliding connection with the mounting groove 313, the floating plate 34 is arranged on the lower wall of the rotating groove 312, the upper side of the floating plate 34 is provided with a clamping groove 341, the inner side wall of the clamping groove 341, the floating plate 34 is in contact with the rotating shaft 35 through a friction surface, the rotating shaft 35 is hollow, and an offset gap is provided between the upper side of the rotating shaft 35 and the upper wall surface of the rotating groove 312.
The water sample is drawn through the water drawing pipe 21, the homogenizing device 3 is arranged in the sampling bottle 5, the water sample uniformly mixed by the homogenizing device 3 is conveyed through the water drawing pipe, the fixing seat 31 is installed through the water drawing pipe 21, the fixing seat 31 supports the double ends of the rotating shaft 35 through the rotating groove 312, the outer ring of the rotating shaft is provided with the stirring wheel 32, the stirring wheel stirs the water sample through the outer paddle, so that the bottom end of the sampling bottle 5 is settled and floated and the water sample is uniformly mixed, the driving motor 33 is installed through the installation groove 313, the driving motor 33 drives the rotating shaft 35 to move downwards through self weight, so that the paddle of the stirring wheel 32 extends into the water sample of the sampling bottle 5, the driving motor 33 outputs torque to drive the rotating shaft 35 to rotate, so as to drive the stirring wheel 32 to stir the water sample in the sampling bottle, so as to homogenize the water sample, improve the uniform mixing degree of the water sample, and reduce the detection error caused by salt precipitation due to temperature change, the floating plate 34 is used for supporting the rotating shaft 35 in an auxiliary way, the floating plate 34 is in frictional contact with the lower side wall surface of the rotating shaft 35 through the friction surface of the inner wall of the clamping groove 341, the driving motor 33, the rotating shaft 35 and the stirring wheel 32 provide initial gravity, when different water samples are sampled and detected, different sampling bottles 5 are different in internal water sample capacity from each other, the fixed seat is relatively fixed, the rotating shaft 35 is arranged in a hollow way, the buoyancy generated by the water samples with different heights on the rotating shaft 35 is different, when the water sample capacity is less, the buoyancy borne by the stirring wheel 32 is smaller, the friction force of the friction surface of the rotating shaft 35 and the floating plate 34 is larger, the driving motor 33 outputs rated power, most of the power is converted into friction internal energy, so that the rotating speed of the stirring wheel 32 is reduced, the rotating speed is too fast when the water samples are less, liquid splashing is caused, the detection precision is influenced, when the water sample capacity is more, the buoyancy obtained by the stirring wheel 32 through the internal space of the rotating shaft 35 is increased, therefore, the rotating shaft overcomes the self-weight floating of the driving motor 33 and the stirring wheel 32, the friction force between the rotating shaft 35 and the floating plate 34 is reduced along with the reduction of the pressure, the driving motor 33 outputs rated power, the rotating speed of the stirring wheel 32 is increased, the stirring wheel 32 drives the water sample to be rapidly disturbed in the sampling bottle for rapid homogenization, and the homogenization time is automatically adjusted according to different water sample capacities, so that the water sample homogenization efficiency is improved, and the detection time is reduced.
As shown in fig. 2 and 5, the sampling device 2 further includes a sampling pump 22 and a negative pressure pipe 24, the sampling pump 22 is disposed at a communication position between the water drawing pipe 21 and the detection chamber 11, the sampling pump 22 is communicated with the liquid inlet passage 311 through the water drawing pipe 21, one end of the negative pressure pipe 24 is communicated with the detection chamber 11, a separation flow passage 12 is disposed on one side of the detection chamber 11, the separation device 4 includes a liquid collecting chamber 43, a separation chamber 433 is disposed on the liquid collecting chamber 43, the separation chamber 433 is communicated with the separation flow passage 12, and an opening and closing valve is disposed on the separation flow passage 12.
The sampling pump 22 is communicated with the water drawing pipe 21, negative pressure is generated at the inlet end, the water drawing pipe 21 is communicated with the liquid inlet channel 311, a water sample is pumped into the detection cavity 11, the sampling pump 22 is controlled in a servo mode to perform quantitative sampling, the detection precision is improved, the negative pressure pipe 24 is communicated with the detection cavity 11, negative pressure is generated in the detection cavity 11, filter paper is arranged at the pipe opening of the negative pressure pipe to prevent the water sample from leaking, the pressure in the detection cavity 11 is reduced, the salt saturation concentration in the water sample is improved, precipitated salts are dissolved in the water sample again, the detection is performed by injecting a reagent through the injection pump, the detection precision is improved, after detection is completed, the detected water sample is directly conveyed into the separation cavity 433 of the liquid collection chamber 43 through the separation flow channel 12, the on-off state of the separation flow channel 12 is controlled through an opening and closing valve, rapid liquid discharge is performed, and the detection efficiency is improved.
As shown in fig. 1-2, the sampling device 2 further includes a high-pressure pipe 25, the high-pressure pipe 25 is communicated with the separation cavity 433, the separation device 4 further includes a heating rod 41 and a condensation plate 42, a liquid outlet 432 is disposed on the upper side of the separation cavity 433, a return channel 13 is disposed on the housing 1, two ends of the return channel 13 are respectively communicated with the separation channel 12 and the liquid outlet 432, the heating rod 41 is disposed in the separation cavity 433, and the condensation plate 42 is disposed in the return channel 13.
The water in the water sample is evaporated through the heating rod 41, the water amount is reduced, salt substances are separated out, the water sample is pressurized through the high-pressure pipe 25, the amount of separated partial salt is increased, the purity of the evaporated water is improved, the water vapor gradually moves upwards along with the increase of the pressure, flows out of the liquid outlet 432 and enters the return channel 13, the water is condensed into liquid water through the condensation plate 42, the liquid water flows out of the return channel 13, the return channel 13 is cleaned, the cleanliness of the separation flow channel 12 is improved, the water sample remained in the separation flow channel 12 is prevented from causing crosstalk to next detection, and the detection precision is improved.
As shown in fig. 2 and 5, the separation device 4 further includes a reversing plate 44, the reversing plate 44 is disposed at the intersection of the separation flow channel 12 and the return flow channel 13, the reversing plate 44 is an "L" -shaped folded plate, a convex block is disposed at a folded corner of the reversing plate 44, a pre-tightening spring is disposed outside the convex block, the reversing plate 44 is rotatably connected with the wall surface of the intersection of the separation flow channel 12 and the return flow channel 13 through the convex block, and two folded edges of the reversing plate 44 are respectively matched with the separation flow channel 12 and the return flow channel 13 in size.
The separation flow channel 12 and the return flow channel 13 are alternatively plugged by two ends of the reversing plate 44 through the L-shaped arrangement of the reversing plate 44, when the flow is discharged, the upper end of the reversing plate 44 is plugged to the return flow channel 13 under the action of the pre-tightening spring, the water sample without salt is prevented from directly entering the return flow channel 13, the cleaning efficiency of the return flow is reduced, the cleaning water is polluted, even the condensing plate 42 is corroded, the service life is influenced, when the cleaning water flows out of the return flow channel 13, the pressure is increased along with the continuous impact on the reversing plate 44, the reversing plate overcomes the elasticity of the pre-tightening spring to rotate, the junction of the separation flow channel 12 and the return flow channel 13 is plugged by the lower end of the reversing plate, the cleaning water directly enters the detection cavity 11 through the front section of the diversion flow channel 12, the inner wall of the detection cavity 11 is cleaned, multiple tests are facilitated, and the crosstalk of the water samples with different concentrations is prevented, the detection efficiency is improved.
As shown in fig. 2, a V-shaped angle section is provided on the separation flow channel 12, the angle of the V-shaped angle section is arranged downward, the return channel 13 is arranged obliquely, and one end of the return channel 13 close to the liquid outlet 432 is located at a high position.
Through the dog-ear section that "V" type set up, make along the clean water that return channel 13 flows and commutate, and spout to detecting 11 upsides in chamber along "V" type groove, clean detecting chamber wall from the top down, guarantee to detect chamber wall cleanliness, prevent to take place sample and cross talk, waste water after the cleanness draws water pipe 21 and feed liquor way 311 discharge along water pipe through sampling pump 22 in proper order, thereby clear up whole flow path, improve the clean degree in water route, thereby improve and detect the precision.
Preferably, a charging chute 431 is arranged on the liquid collecting chamber 43, and the charging chute 431 is communicated with the separation cavity 433. The separated salt substances are collected through the blanking groove 431, so that the cleaning is convenient and the scale deposition is prevented.
As shown in fig. 2 and 7, the water drawing pipe 21 includes an outer pipe 211 and an inner pipe 212, the outer pipe 211 is communicated with an input end of the sampling pump 22, the inner pipe 212 is communicated with the liquid inlet passage 311, a chute 2112 is provided at a lower end of the outer pipe 211, a partition plate 213 is provided at an upper side of the chute 2112, the inner pipe 212 is slidably connected with the chute 2112, a liquid discharge passage 2111 is provided at a lower side of the chute 2112, and the liquid discharge passage 2111 faces an outer circumferential surface of the inner pipe 212.
The water drawing pipe 21 is arranged through the outer pipe 211 and the inner pipe 212, the pipe wall of the inner pipe 212 and the slideway 2112 of the outer pipe 211 are arranged in a sealing mode, when a water sample is drawn, negative pressure is generated in the outer pipe 212, the inner pipe 212 moves upwards, the inner pipe moves upwards for limiting through the partition plate 213, the jacking spring is sleeved on the outer ring of the upper end of the inner pipe, when the pipeline is cleaned, water flow pumped out by the sampling pump 22 impacts the inner pipe 212 along the outer pipe 211, the inner pipe moves downwards by overcoming the elastic force of the jacking spring, the inner pipe is driven to move downwards, when the inner pipe moves to the bottommost end, the slideway 2112 is communicated with the drainage channel 2111, clean water flows out along the outer wall of the inner pipe, the fixing seat 31 and the lower end pipeline are self-cleaned, crosstalk is prevented, and the detection precision is improved.
A detection method of a water quality monitoring device for preventing sample crosstalk comprises the following steps:
1) drawing a sample; firstly, the sampling pump 22 pumps the water sample, so that part of the water sample flows out of the sampling bottle 5 and enters the detection cavity 11.
2) Dissolving under negative pressure; the negative pressure pipe 24 generates negative pressure in the detection cavity 11, so that the saturated concentration of salt substances is improved, part of precipitated salts are dissolved in the water sample again, and the detection precision is improved.
3) Detecting the concentration; the reagent is injected into the detection chamber 11 by the injection pump, and the light source plate 232 and the detection plate 231 are simultaneously activated, thereby detecting the absorbance of the water sample.
4) Pressurizing, evaporating, separating out crystal, and gas-solid separating; the water in the detected water sample is evaporated by heating, salt substances are separated out, partial salt substances are further separated out by pressurizing to form clean steam, and clean water is formed by condensation.
5) The passage is self-cleaned. Carry out self-cleaning to the sample water route through clean water to insert the part in the sampling bottle to the lower extreme and clean, prevent that the sample from crosstalking, improve and detect the precision.
The working principle of the invention is as follows: the driving motor 33, the rotating shaft 35 and the stirring wheel 32 provide initial gravity, when different water samples are sampled and detected, different sampling bottles 5 are different in capacity from the water samples in the sampling bottles, the rotating shaft 35 is arranged in a hollow mode, the water samples with different heights are different in buoyancy generated on the rotating shaft 35, when the water samples are small in capacity, the buoyancy borne by the stirring wheel 32 is small, the friction force between the rotating shaft 35 and the friction surface of the floating plate 34 is large, and the driving motor 33 outputs rated power, so that the rotating speed of the stirring wheel 32 is reduced, the phenomenon that the rotating speed is too high when the water samples are small, liquid splashes and detection precision is affected is avoided; when the water sample capacity is large, the buoyancy obtained by the stirring wheel 32 through the inner space of the rotating shaft 35 is increased, so that the rotating shaft overcomes the self-weight of the driving motor 33 and the stirring wheel 32 to float upwards, the friction force between the rotating shaft 35 and the floating plate 34 is reduced along with the reduction of the pressure, the driving motor 33 outputs rated power, and the rotating speed of the stirring wheel 32 is increased, so that the stirring wheel 32 drives the water sample to rapidly disturb in the sampling bottle for rapid homogenization, and the homogenization time is automatically adjusted according to different water sample capacities, so that the water sample homogenization efficiency is improved, and the detection time is reduced; the negative pressure pipe 24 generates negative pressure in the detection cavity 11, so that the pressure in the detection cavity 11 is reduced, the saturated concentration of the salts in the water sample is improved, the precipitated salts are dissolved in the water sample again, the interference caused by the precipitated salts is prevented, and the detection precision is improved; the water in the water sample is evaporated through the heating rod 41, salt substances are separated out along with the reduction of the water amount, the water sample is pressurized through the high-pressure pipe 25, the separation amount of partial salts is improved, so that the purity of the evaporated water is improved, water vapor is condensed into liquid water through the condensing plate 42, the liquid water flows out of the return channel 13, the return channel 13 is cleaned, the cleanliness of the separation channel 12 is improved, the crosstalk of the water sample remained in the separation channel 12 to the next detection is prevented, and the detection precision is improved; when the pipeline is cleaned, the water flow pumped by the sampling pump 22 impacts the inner pipe 212 along the outer pipe 211, so that the inner pipe moves downwards against the elastic force of the jacking spring, the inner pipe is driven to move downwards, when the inner pipe moves to the bottommost end, the slide way 2112 is communicated with the drainage way 2111, clean water flows out along the outer wall of the inner pipe, the fixing seat 31 and the pipeline at the lower end are self-cleaned, and crosstalk is prevented.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a prevent water quality monitoring device that sample crosstalked, water quality monitoring device detects the water sample of transfer in to sampling bottle (5), its characterized in that: the water quality monitoring device for preventing sample crosstalk comprises a shell (1), a sampling device (2), a homogenizing device (3) and a separating device (4), wherein the shell (1) is connected with the sampling device (2), the sampling device (2) is fixedly connected with the homogenizing device (3), the separating device (4) is communicated with the shell (1), a sampling groove is formed in the shell (1), a sampling bottle (5) is arranged in the sampling groove, a detection cavity (11) is formed in the shell (1), the detection cavity (11) is positioned on the upper side of the sampling groove, the sampling device (2) comprises a water suction pipe (21) and a detection assembly (23), the upper end of the water suction pipe (21) is communicated with the detection cavity (11), the detection assembly (23) is arranged in the detection cavity (11), and the detection assembly (23) comprises a detection plate (231), a light source plate (232) and an injection pump, the detection plate (231) and the light source plate (232) are symmetrically arranged along the detection cavity (11), and the output end of the injection pump is communicated with the detection cavity (11).
2. The water quality monitoring device for preventing the crosstalk of the sample according to claim 1, wherein: the lower end of the water drawing pipe (21) extends into the sampling groove, the lower end of the water drawing pipe (21) is provided with a homogenizing device (3), the homogenizing device (3) is arranged in the sampling bottle (5), the homogenizing device (3) comprises a fixing seat (31), a stirring wheel (32), a driving motor (33) and a floating plate (34), the fixing seat (31) is fixedly connected with the water drawing pipe (21), the fixing seat (31) is provided with a liquid inlet channel (311), the inlet of the liquid inlet channel (311) faces the sampling bottle (5), the outlet of the liquid inlet channel (311) is communicated with the water drawing pipe (21), the fixing seat (31) is provided with a rotating groove (312), the stirring wheel (32) is provided with a rotating shaft (35), two ends of the rotating shaft (35) are movably connected with the rotating groove (312), one side of the rotating groove (312) is provided with a mounting groove (313), the driving motor (33) is arranged in the mounting groove (313), the output end of a driving motor (33) is in transmission connection with a rotating shaft (35), the outer frame of the driving motor (33) is in sliding connection with a mounting groove (313), a floating plate (34) is arranged on the lower wall surface of the rotating groove (312), a clamping groove (341) is formed in the upper side of the floating plate (34), a friction surface is arranged on the inner side wall surface of the clamping groove (341), the floating plate (34) is in contact with the rotating shaft (35) through the friction surface, the rotating shaft (35) is arranged in a hollow mode, and an offset gap is formed between the upper side of the rotating shaft (35) and the upper wall surface of the rotating groove (312).
3. The water quality monitoring device for preventing the crosstalk of the sample according to claim 2, wherein: the sampling device (2) further comprises a sampling pump (22) and a negative pressure pipe (24), the sampling pump (22) is arranged at a communication position of the water drawing pipe (21) and the detection cavity (11), the sampling pump (22) is communicated with the liquid inlet channel (311) through the water drawing pipe (21), one end of the negative pressure pipe (24) is communicated with the detection cavity (11), a separation flow channel (12) is arranged on one side of the detection cavity (11), the separation device (4) comprises a liquid collection chamber (43), a separation cavity (433) is arranged on the liquid collection chamber (43), the separation cavity (433) is communicated with the separation flow channel (12), and an opening and closing valve is arranged on the separation flow channel (12).
4. The water quality monitoring device for preventing the crosstalk of the sample according to claim 3, wherein: sampling device (2) still includes high-pressure pipe (25), high-pressure pipe (25) and disengagement chamber (433) intercommunication, disengagement device (4) are still including heating rod (41) and condenser plate (42), disengagement chamber (433) upside is equipped with liquid outlet (432), be equipped with return channel (13) on casing (1), return channel (13) both ends communicate with disengagement flow way (12) and liquid outlet (432) respectively, in disengagement chamber (433) are arranged in to heating rod (41), condenser plate (42) are arranged in return channel (13).
5. The water quality monitoring device for preventing the crosstalk of the sample according to claim 4, wherein: separator (4) still include switching-over board (44), separation runner (12) and return runner (13) intersection are arranged in to switching-over board (44), and switching-over board (44) are "L" type folded plate, and switching-over board (44) dog-ear department is equipped with the lug, the lug outside is equipped with the pretension spring, switching-over board (44) are connected through lug and separation runner (12) and return runner (13) intersection wall rotation, two hems of switching-over board (44) respectively with separation runner (12) and return runner (13) size adaptation.
6. The water quality monitoring device for preventing the crosstalk of the sample according to claim 5, wherein: the separation runner (12) is provided with a V-shaped break angle section, the break angle of the V-shaped break angle section is arranged downwards, the return channel (13) is obliquely arranged, and one end of the return channel (13) close to the liquid outlet (432) is positioned at a high position.
7. The water quality monitoring device for preventing the crosstalk of the sample according to claim 5, wherein: a charging chute (431) is arranged on the liquid collecting chamber (43), and the charging chute (431) is communicated with the separation cavity (433).
8. The water quality monitoring device for preventing the crosstalk of the sample according to claim 6, wherein: the water drawing pipe (21) comprises an outer pipe (211) and an inner pipe (212), the outer pipe (211) is communicated with an input end of a sampling pump (22), the inner pipe (212) is communicated with a liquid inlet channel (311), a slide way (2112) is arranged at the lower end of the outer pipe (211), a partition plate (213) is arranged on the upper side of the slide way (2112), the inner pipe (212) is connected with the slide way (2112) in a sliding mode, a flow discharging channel (2111) is arranged on the lower side of the slide way (2112), and the flow discharging channel (2111) faces to the outer circular surface of the inner pipe (212).
9. The detection method of the water quality monitoring device for preventing the sample crosstalk according to claim 1, characterized in that: the detection method comprises the following steps:
1) drawing a sample;
2) dissolving under negative pressure;
3) detecting the concentration;
4) pressurizing, evaporating, separating out crystal, and gas-solid separating;
5) the passage is self-cleaned.
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| CN102949856A (en) * | 2011-08-26 | 2013-03-06 | 俞天翔 | Natural-circulation self-cleaning evaporation device |
| CN108896349A (en) * | 2018-07-18 | 2018-11-27 | 李建英 | A method of the monitoring contaminated degree of fully-loaded stream |
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