CN110672595A - Water quality monitor - Google Patents
Water quality monitor Download PDFInfo
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- CN110672595A CN110672595A CN201910943673.3A CN201910943673A CN110672595A CN 110672595 A CN110672595 A CN 110672595A CN 201910943673 A CN201910943673 A CN 201910943673A CN 110672595 A CN110672595 A CN 110672595A
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
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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
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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
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
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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
- G01N2021/0106—General arrangement of respective parts
- G01N2021/0112—Apparatus in one mechanical, optical or electronic block
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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
- G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
- G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
- G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
- G01N2021/786—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour with auxiliary heating for reaction
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Abstract
The invention provides a water quality monitor, and relates to the technical field of water quality monitoring equipment. Wherein, a water quality monitoring appearance, includes the casing, is provided with sampling device, reaction unit, detection device and control terminal in the casing, and sampling device includes ten logical valve, measuring flask and peristaltic pump, and the main branch road of ten logical valve passes through the pipe intercommunication with the measuring pump, and the peristaltic pump passes through pipe and measuring flask intercommunication, and reaction unit includes the reaction flask, and the winding of week side of reaction flask has the heater strip, is provided with temperature sensor in the reaction flask, detection device includes light source transmitter and one-level light sensor. The invention has the advantages of high measurement precision, simple operation and reasonable structure.
Description
Technical Field
The invention relates to the technical field of water quality monitoring equipment, in particular to a water quality monitor.
Background
The water quality monitoring is a process of monitoring and measuring the types of pollutants in the water body, the concentrations and the variation trends of various pollutants and evaluating the water quality condition. The monitoring range is very wide, and the monitoring range comprises uncontaminated and contaminated natural water (rivers, lakes, seas and underground water), various industrial drainage and the like. The main monitoring projects can be divided into two main categories: one is a comprehensive index reflecting the water quality condition, such as items of temperature, chroma, conductivity, BOD, COD, ammonia nitrogen, total phosphorus, total nitrogen, turbidity, PH, dissolved oxygen and the like; the other is some toxic substances, such as phenol, cyanogen, arsenic, lead, chromium, cadmium, mercury, organic pesticides and the like. In order to objectively evaluate the water quality of rivers and oceans, it is sometimes necessary to measure the flow velocity and flow rate in addition to the above-mentioned monitoring items.
The water quality on-line monitor is used for on-line water quality monitoring, and generally adopts a colorimetric method to monitor water quality. When a water sample is analyzed, the water sample and measuring reagents with different components are subjected to chemical reaction, the color of the reacted test solution is changed, and the content of the component to be detected is determined by comparing the color depth of the colored substance solution. The light with specific wavelength emitted by the emitting end penetrates through the internal solution and reaches the receiving end, and the absorbance of the solution is determined by measuring the light intensity of the receiving end. Can be used for monitoring the ammonia nitrogen content, the total phosphorus content and the chemical oxygen demand in water.
Therefore, the existing ammonia nitrogen water quality on-line monitor needs to comprise a plurality of quartz tanks for chemical reaction, dilution and measurement respectively, and the whole monitoring process is long in time consumption. In addition, the existing ammonia nitrogen online monitoring instruments are manually intervened, a preparation reagent needs to be prepared on site, and the cleanliness of the instruments is difficult to maintain in the process of conveying the reagent and a water sample to perform reaction, so that the problems of low testing precision and large testing result error are caused.
Therefore, in the field of water quality monitoring and analysis, there is always a need for an improved ammonia nitrogen water quality on-line monitor which can avoid the above problems.
In view of the above, the inventor of the present application invented a water quality monitor.
Disclosure of Invention
The invention provides a water quality monitor, aiming at solving the problems that the existing detector needs an on-site reagent and has low measurement precision.
In order to achieve the purpose, the invention provides the following technical scheme:
a water quality monitor is characterized by comprising a machine shell, wherein a sample introduction device, a reaction device, a detection device for detecting the absorbance of a sample and a control terminal are arranged in the machine shell;
the sampling device comprises a ten-way valve, a metering bottle and a peristaltic pump, wherein a main branch, nine branch paths respectively communicated with the main branch and a switching assembly used for communicating the main branch with any one of the branch paths are arranged in the ten-way valve;
the reaction device comprises a lightproof installation shell and a reaction bottle, wherein the reaction bottle is positioned in the installation shell, heating wires are arranged on the periphery of the reaction bottle, two fixing rings for the heating wires to penetrate through are respectively arranged on the periphery of the reaction bottle at two ends of the reaction bottle, a fixing column for fixing the heating wires is arranged between the fixing rings, the heating wires are wound between the two fixing columns, the heating wires are spirally wound on the periphery of the reaction bottle between the adjacent fixing rings and the fixing columns, a temperature groove which obliquely extends downwards towards the axis direction of the bottle body is arranged in the middle of the reaction bottle, a temperature sensor is arranged in the temperature groove, and the reaction bottle is communicated with any branch of the ten-way valve through a guide pipe;
the detection device comprises a light source emitter and a primary optical sensor, wherein the light source emitter and the optical sensor are positioned at the same height and are respectively positioned at two sides of the mounting shell, a light splitting piece for splitting a light source into two light paths is arranged in the light source emitter, one light path is received by a secondary optical sensor of the light source emitter and is used as a contrast light beam, and the other light path penetrates through the reaction bottle and irradiates a receiving end of the primary optical sensor as a detection light beam;
the light source emitter is positioned between the two fixed columns, and the axes of the fixed columns are perpendicular to the path of the detection light beam, so that the detection light beam avoids the heating wire when penetrating through the reaction flask.
By adopting the scheme, when the reagent bottle is used, the reagent bottle is communicated with the measuring bottle through the ten-way valve, various reagents enter the measuring bottle through the ten-way valve, after the metering in the measuring bottle is finished, the measuring bottle is communicated with the reaction bottle through the ten-way valve, the reagents flow into the reaction bottle through the ten-way valve, after all the reagents are added, the measuring bottle is communicated with the reaction bottle through the ten-way valve, the reaction bottle is bubbled through the peristaltic pump, the reagents in the reaction bottle are uniformly mixed, then the reaction bottle is heated through the heating wire, after the reaction bottle is heated to the specified temperature, the heating wire is controlled by the control terminal to stop heating, after the reagents are completely reacted, the reaction bottle is cooled to room temperature, then the light source emitter is turned on, the detection light beam emitted by the light source emitter is received by the primary light sensor through the reaction bottle, and the primary light sensor sends the detected, meanwhile, a contrast light beam emitted by the light source emitter is sent to the control terminal through the secondary light sensor, and the control terminal converts the collected light intensity into the content of the measured object, so that the detection result is tested.
Further, ten logical valves include valve body seat, valve seat cover, main branch road and branch road are the circumference and offer in the week side of valve seat cover, the switching subassembly includes motor, carousel and fixed disk, the motor is located the valve body seat and keeps away from the one end of valve seat cover and is connected with control terminal electricity, the carousel rotates with the valve body seat to be connected and links with the motor, fixed disk and valve seat cover spiro union, the main groove with main branch road intercommunication is offered towards the center of carousel to the fixed disk, the fixed disk is the circumference towards the quotation of carousel and offers nine branch grooves that communicate one by one with branch road respectively, the switching groove that is used for communicating main groove and arbitrary one branch groove is offered to the quotation of carousel orientation fixed disk, the switching groove extends to the position in branch groove from the position in main groove.
By adopting the scheme, the motor turntable rotates, the switching groove does circular motion along with the motor turntable in the rotating process of the turntable, the fixed disk cannot rotate along with the turntable due to the fact that the fixed disk is in threaded connection with the valve body seat, and the positions of the branch grooves on the fixed disk are fixed.
Furthermore, a connecting piece for communicating the guide pipe with the branch road or the main road is connected with the periphery of the valve seat cover through threads, and a connecting hole for inserting the liquid guide pipe is formed in the connecting piece.
By adopting the scheme, when the guide pipe is installed, the guide pipe is forcibly inserted into the installation hole to fix the guide pipe and the connecting piece, and then the connecting piece is screwed into the peripheral side of the valve seat cover, so that the guide pipe is communicated with the branch circuit or the main branch circuit, and the installation mode is simple and stable in structure.
Further, the week side of reaction flask is located and sets up the spacing arch of a plurality of intervals between solid fixed ring and the fixed column, the heater strip is the heliciform and passes the clearance between the adjacent spacing arch.
Through adopting above-mentioned scheme, because the outer wall of reaction flask is more smooth, the heater strip is easy for the landing and is in the same place, causes the local overheat of reaction flask, and this problem can be improved to spacing arch, and the heater strip passes the clearance between two adjacent spacing archs when the winding, and adjacent spacing arch is injectd the heater strip between the two, avoids heating the silk group together.
Furthermore, the fixed column includes canned paragraph and spacing section, the canned paragraph is fixed with the reaction bottle, spacing section is located the canned paragraph and keeps away from the one end of reaction bottle and its diameter is greater than the canned paragraph.
Through adopting above-mentioned scheme, when the reaction bulb used, the heater strip winding was in the week side of canned paragraph, and spacing section can prevent that the heater strip from breaking away from the canned paragraph for the fixed column is more firm to the fixed of heater strip.
Furthermore, two electromagnetic valves are respectively arranged at two ends of the installation shell in the machine shell, the electromagnetic valves are electrically connected with the control terminal, and the two electromagnetic valves are respectively communicated with two ends of the reaction bottle through guide pipes.
Through adopting above-mentioned scheme, at the in-process of reaction bottle heating, can produce steam, the solenoid valve plays sealed effect, prevents that steam from running out, leads to the reactor to resume atmospheric pressure after the normal atmospheric temperature and changes, influences the condition of measuring result and appears, improves measurement accuracy.
Furthermore, be provided with the refrigerating plant who is used for preserving chemical reagent in the casing, refrigerating plant includes refrigeration piece, refrigeration inner bag and fin, the refrigeration inner bag contacts with the cold junction of refrigeration piece, the fin contacts with the hot junction of refrigeration piece, the storage tank that is used for putting into the reagent bottle is seted up to the refrigeration inner bag, the week side of refrigeration inner bag is provided with thermal-insulated asbestos.
Through adopting above-mentioned scheme, during the use, put into the storage tank with reagent in, the refrigeration piece cools off the refrigeration inner bag, for reagent provides the low temperature condition, and the heat that the refrigeration piece gived off distributes away through the fin, and turbofan accelerates the circulation speed of air in the shell for the radiating rate of fin, refrigeration effect is good, make the stable performance of reagent, further improves measurement accuracy.
Furthermore, a reagent placing table is arranged below the ten-way valve in the machine shell, and a plurality of cylindrical placing grooves are formed in the placing table.
Through adopting above-mentioned scheme, make things convenient for the placing of multiple reagent.
Furthermore, the outer wall of the casing is provided with a display screen, and the display screen is electrically connected with the control terminal.
By adopting the scheme, the working conditions of all parts of the monitor can be visually seen through the display screen, and the control on the work of all the parts is facilitated.
Compared with the prior art, the invention has the beneficial effects that:
(1) by arranging the fixing ring, the fixing column, the limiting bulge and the temperature sensor, the fixing ring, the fixing column and the limiting bulge are matched with each other, so that the heating wires are uniformly distributed on the periphery of the reaction bottle, the temperature inside the reaction bottle is uniform, the influence of nonuniform temperature on a measurement structure is eliminated, meanwhile, the temperature sensor realizes accurate control on the reaction temperature, the reaction is carried out under a constant temperature condition, the influence of temperature difference on the measurement structure is eliminated, and the measurement precision of the monitor is improved;
(2) the light source emitter emits two beams of light of a contrast light beam and a detection light beam, and the arrangement of the contrast light beam eliminates the influence of the change of the light intensity of the light source on the measurement of the absorbance, thereby further improving the measurement precision of the monitor;
(3) the fixed column is arranged, and the light source emitter and the fixed column are staggered in space, so that the detection light beam avoids the heating wire when passing through the reaction flask, the reaction flask can be uniformly heated, meanwhile, the light intensity of the detection light beam cannot be influenced by the heating wire, and the structure arrangement is reasonable;
(4) through setting up the solenoid valve, guarantee that the pressure before the reaction of reaction bottle is unanimous with the pressure after the reaction, eliminate the influence of pressure variation to measuring result, further improve measurement accuracy.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a schematic view of the overall structure of the monitor;
FIG. 2 is a block diagram of a ten way valve;
FIG. 3 is an exploded view of the ten way valve;
FIG. 4 is a cross-sectional view of the ten-way valve highlighting the internal passage;
FIG. 5 is a view showing the construction of the reaction apparatus and the detection apparatus;
FIG. 6 is a schematic view of a combination of a reaction flask and a heating wire;
FIG. 7 is a schematic view of a combination of a reaction flask and a temperature bath;
FIG. 8 is an overall view of the refrigerating apparatus
FIG. 9 is a block diagram of a refrigeration unit;
fig. 10 is an internal structure view of the refrigeration apparatus.
Description of the main elements
1. A housing; 2. mounting a plate; 3. a display screen; 4. a placing table; 5. a placement groove;
6. a sample introduction device; 61. a ten-way valve; 611. a valve body seat; 612. a valve seat cover; 613. a motor; 614. a turntable; 615. fixing the disc; 62. a metering bottle; 63. a peristaltic pump;
7. a reaction device; 71. mounting a shell; 72. a reaction bottle;
8. a detection device; 81. a light source emitter; 82. a primary light sensor;
9. a main branch; 10. a branch circuit; 11. a branch groove; 12. a main tank; 13. switching a slot; 14. a drive shaft; 15. limiting convex strips; 16. a limiting groove; 17. a compression spring; 18. sealing the sheet; 19. a connecting member; 20. mounting holes; 21. mounting blocks; 22. heating wires; 23. a fixing ring; 24. fixing a column; 25. a limiting bulge; 26. a temperature tank; 27. a temperature sensor;
28. a refrigeration device; 281. a housing; 282. a refrigeration plate; 283. refrigerating the inner container; 284. a heat sink; 29. a containing groove; 30. heat insulating asbestos; 31. a heat radiation fan; 32. heat dissipation holes; 33. an electromagnetic valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Example one
As shown in fig. 1, a water quality monitor comprises a casing 1, wherein a sample introduction device 6, a reaction device 7, a detection device 8 for detecting the absorbance of a sample and a control terminal are arranged in the casing 1, a mounting plate 2 is arranged in the casing 1, and the sample introduction device 6, the reaction device 7 and the detection device 8 are all mounted on the mounting plate 2. The outer wall of the casing 1 is provided with a display screen 3, and the display screen 3 is electrically connected with the control terminal. A reagent placing table 4 is arranged below the sample injection device 6 in the machine shell 1, a plurality of cylindrical placing grooves 5 are formed in the placing table 4, and a reaction reagent is placed in the placing grooves 5 when the device is used. A refrigerating device 28 for storing chemical reagents is provided in the casing 1, and the refrigerating device 28 is positioned below the placement table 4 and fixed to the casing 1 by bolts.
As shown in fig. 1, the sample feeding device 6 includes a ten-way valve 61, a metering bottle 62 and a peristaltic pump 63, a main branch 9, nine branch lines 10 respectively communicated with the main branch 9, and a switching assembly for communicating the main branch 9 and the branch lines 10 are disposed in the ten-way valve 61, the main branch 9 of the ten-way valve 61 is communicated with the metering pump through a conduit, and the peristaltic pump 63 is communicated with the metering bottle 62 through a conduit.
As shown in fig. 2 and 3, the ten-way valve 61 includes a valve body seat 611, a valve seat cover 612, and a switching assembly, the main branch 9 and the branch 10 are circumferentially opened on the periphery of the valve seat cover 612, the switching assembly includes a motor 613, a rotating disc 614, and a fixed disc 615, the motor 613 is located on the side of the valve body seat 611 away from the valve seat cover 612 and is embedded in the housing 1, the fixed disc 615 is located in the valve seat cover 612 and is screwed with the valve seat cover 612, and the rotating disc 614 is located in the valve seat cover 612 and is linked with the motor 613.
As shown in fig. 2 and 4, nine branch grooves 11, which are respectively in one-to-one correspondence with the branch passages 10, are formed in the fixed disk 615 so as to extend circumferentially toward the disk surface of the turntable 614. A main groove 12 communicating with the main path 9 is opened in a surface of the fixed disk 615 facing the turntable 614, and the main groove 12 is coaxial with the fixed disk 615. A switching groove 13 for communicating the main groove 12 with any one of the branch grooves 11 is formed on the disk surface of the rotating disk 614 facing the fixed disk 615, and the switching groove 13 extends from the position of the main groove 12 to the position of the branch groove 11 and has a length equal to the distance between the main groove 12 and any one of the branch grooves 11.
Through the structure, the motor 613 drives the rotating disc 614 to rotate, and during the rotation process, the switching groove 13 makes circular motion with the main groove 12 as the center, and as the fixed disc 615 is in threaded connection with the valve body seat 611, the position of the branch groove 11 on the fixed disc 615 is fixed, so that the branch grooves 11 at different positions can be respectively communicated with the main groove 12 during the circular motion process of the switching groove 13, thereby realizing the switching of the ten-way valve 61 and controlling the flow direction of liquid.
As shown in fig. 2 and 3, a transmission shaft 14 is disposed between a rotating shaft of the motor 613 and the fixed disk 615, the transmission shaft 14 is rotatably connected to the valve body seat 611 and is linked with the motor 613, a limit protrusion 15 is disposed on the circumferential side of the rotating disk 614 facing the transmission shaft 14, a limit groove 16 matched with the limit protrusion 15 is disposed on one surface of the transmission shaft 14 facing the rotating disk 614, when the motor 613 rotates, the transmission shaft 14 rotates, the limit protrusion 15 rotates together with the transmission shaft 14, thereby driving the rotating disk 614 to rotate, and realizing the linkage between the rotating disk 614 and the motor 613.
A pressing spring 17 is arranged between the rotary disc 614 and the rotating shaft of the motor 613, and the pressing spring 17 is sleeved on the periphery of the transmission shaft 14, so that the rotary disc 614 can press the fixed disc 615 under the action of the elastic force of the pressing spring 17, so that the two are tightly abutted, and the liquid is prevented from leaking from the disc surfaces contacted with the two. A sealing sheet 18 is arranged between the rotating disc 614 and the fixed disc 615, the sealing sheet 18 is embedded on the disc surface of the fixed disc 615, the sealing sheet 18 enables the two to be attached more tightly, and liquid is prevented from leaking from the disc surfaces contacted with the two.
A connector 19 for connecting the conduit to the main branch 9 or the branch line 10 is screwed to the periphery of the valve body cover, and a mounting hole 20 into which the conduit is inserted is formed in the connector 19. When the connecting device is used, the conduit is forcibly inserted into the mounting hole 20, and then the connecting piece 19 is connected with the valve seat cover 612, so that the conduit can be communicated with the main groove 12 or the branch groove 11, and the mounting mode is simple.
As shown in fig. 5, the reaction device 7 includes a mounting case 71 and a reaction flask 72 located in the mounting case 71, and the mounting case 71 is located on the mounting plate 2 and on the left side of the metering flask 62. The mounting shell 71 is a closed rectangle and is light-tight, soft mounting blocks 21 are respectively fixed at two ends of the mounting shell 71, and two ends of the reaction flask 72 are embedded in the mounting blocks 21 and are coaxial with the mounting blocks 21.
As shown in fig. 6, a heating wire 22 is wound around the circumference of the reaction flask 72, two fixing rings 23 are integrally formed at both ends of the reaction flask 72 on the circumference, two fixing posts 24 are spaced apart from each other on the circumference of the reaction flask 72, and the two fixing posts 24 are located between the two fixing rings 23. The heating wire 22 firstly passes through the fixing ring 23 at one end of the reaction flask 72 and is spirally wound on the periphery of the reaction flask 72, then is wound between the two fixing columns 24, and then is spirally wound on the periphery of the reaction flask 72 until penetrating out from the fixing ring 23 at the other end, so that the fixing of the heating wire 22 is realized, the structure is stable, and the heating of the reaction flask 72 is more uniform.
The plurality of limiting bulges 25 are arranged between the adjacent fixing ring 23 and the fixing column 24 on the peripheral side of the reaction flask 72, and the heating wire 22 passes through the gap between the two adjacent limiting bulges 25 when being wound on the peripheral side of the reaction flask 72, so that the limitation on the heating wire 22 is realized, and the phenomenon that the heating wire 22 is clustered together due to the smoothness of the outer wall of the reaction flask 72 to cause the local overheating of the reaction flask 72 is avoided.
As shown in fig. 7, a temperature groove 26 is provided in the reaction flask 72 in a recessed manner, a temperature sensor 27 is provided in the temperature groove 26, and an end of the temperature sensor 27 remote from the temperature groove 26 penetrates the mounting plate 2. The temperature sensor 27 realizes accurate control of the temperature of the reaction flask 72, and ensures that the reaction is carried out under a constant temperature condition.
As shown in fig. 1 and 5, the detecting device 8 includes a light source emitter 81 and a primary light sensor 82, the light source emitter 81 and the primary light sensor 82 are located at the same height and both extend into the mounting shell 71 through the mounting shell 71. The light source emitter 81 is internally provided with a light splitting piece which divides a light source into two light paths, one light path is received by the second-level light sensor of the light source emitter and is used as a contrast light beam, the other light path penetrates through the reaction bottle 72 and irradiates the receiving end of the first-level light sensor 82 to be used as a detection light beam, and the structure of the light source emitter 81 is consistent with that of the on-line monitor disclosed with the publication number of CN 208313812U. When the light source of the light source emitter 81 is changed, the detection light beam and the contrast light beam transmitted through the reaction vial 72 are also changed at the same time. The comparison light beam is used as the zero light intensity, so that the time for reading the zero light intensity and the light intensity of the detection light beam of the reaction bottle 72 can be ensured to be the same, then the measurement error caused by the change of the light source emitter 81 can be eliminated through calculation, and the accuracy of the measurement result is improved.
The light outlet of the light source emitter 81 is located between the two fixing posts 24, and the fixing posts 24 are far away from the side wall of the mounting plate 2 towards the mounting shell 71. Through the structure, the detection light beam emitted by the light source emitter 81 just can pass through the section of the peripheral side of the reaction flask 72 without the heating wire 22, so that the light beam emitted by the light source emitter 81 is prevented from encountering the heating wire 22 when penetrating through the reaction flask 72 and influencing the detection of light intensity, thereby influencing the measurement result, ensuring the uniform heating of the reaction flask 72 and ensuring the measurement accuracy of the light intensity of the detection light beam.
The control terminal comprises a switching module for controlling the switching of the ten-way valve 61, a flow module for controlling the flow of the reagent, a temperature control module for controlling the temperature, and a calculation module for converting the absorbance into the content of the measured object, the peristaltic pump 63 is electrically connected with the flow module, the temperature sensor 27 is electrically connected with the temperature control module, and the primary optical sensor 82 and the secondary optical sensor are both electrically connected with the calculation module.
As shown in fig. 8 and 9, the refrigeration device 28 includes a closed housing 281, a refrigeration sheet 282, a refrigeration liner 283 and a heat sink 284, wherein the refrigeration sheet 282, the refrigeration liner 283 and the heat sink 284 are all located in the housing 281, the refrigeration liner 283 is connected with the housing 281 by screws, the refrigeration sheet 282 is located between the refrigeration liner 283 and the heat sink 284, the refrigeration sheet 282 and the heat sink 284 are fixed with the refrigeration liner 283 by screws, the refrigeration liner 283 is in contact with the cold end of the refrigeration sheet 282, and the heat sink 284 is in contact with the hot end of the refrigeration sheet 282.
The refrigeration liner 283 is made of aluminum, the aluminum has excellent heat conductivity, the refrigeration efficiency of the refrigeration device 28 is improved, and meanwhile, the aluminum is light in weight, so that the weight of the refrigeration device 28 can be reduced. The upper surface of the refrigerating inner container 283 is provided with a containing groove 29 for placing the reagent bottle. The outer wall of the refrigerating liner 283 comprises two planes and two curved surfaces, and the two planes and the two curved surfaces are symmetrically distributed by taking the axis of the accommodating groove 29 as a symmetric center.
As shown in fig. 10, the refrigerating sheet 282 is attached to a plane and fixed together by screws, and the heat insulation asbestos 30 is adhered to the curved surface of the refrigerating liner 283, so that the heat insulation asbestos 30 has a heat insulation function, thereby greatly reducing the heat exchange between the refrigerating liner 283 and the outside, keeping the refrigerating liner 283 at a low temperature, and reducing the energy consumption.
A heat dissipation fan 31 is disposed in the casing 281 at an end of the heat dissipation plate 284 away from the cooling plate 282, the heat dissipation fan 31 is a turbine fan, the heat dissipation fan 31 is connected to the casing 281 by screws, and a plurality of heat dissipation holes 32 are disposed on the casing 281 at two sides of the heat dissipation plate 284.
When the cooling device is used, a reagent is placed in the accommodating groove 29, the refrigerating sheet 282 cools the refrigerating liner 283 to provide a low-temperature condition for the reagent, heat emitted by the refrigerating sheet 282 is emitted through the radiating fins 284, the circulation rate of air in the shell is increased by the turbofan, and the radiating speed of the radiating fins 284 is increased. The refrigerating device has the advantages of good refrigerating effect, simple structure, small volume and low energy consumption.
The working process of the invention is as follows:
when the water quality monitor is used for detecting the content of ammonia nitrogen in water, required reagents except alkaline hypochlorous acid solution are placed in the placing groove 5, the alkaline hypochlorous acid solution is placed in the containing groove 29 of the refrigerating device 28, the reagent bottle is communicated with the metering bottle 62 through the ten-way valve 61, various reagents enter the metering bottle 62 through the ten-way valve 61, after metering in the metering bottle 62 is completed, the metering bottle 62 is communicated with the reaction bottle 72 through the ten-way valve 61, and the reagents flow into the reaction bottle 72 through the ten-way valve 61 to complete sample introduction operation.
After all reagents are added, the metering bottle 62 is communicated with the reaction bottle 72 through the ten-way valve 61, the reaction bottle 72 is bubbled through the peristaltic pump 63, the reagents in the reaction bottle 72 are uniformly mixed, then the reaction bottle 72 is heated through the heating wire 22, after the reaction bottle is heated to a specified temperature, the control terminal controls the heating wire 22 to stop heating, and the reaction bottle 72 is kept stand to wait for the reagents to react in order to complete the reaction operation.
After the reagents completely react, the reaction bottle 72 is cooled to room temperature, the light source emitter 81 is turned on, a detection light beam emitted by the light source emitter 81 penetrates through the reaction bottle 72 and is received by the primary light sensor 82, the primary light sensor 82 sends the detected light intensity to the control terminal, meanwhile, a comparison light beam emitted by the light source emitter 81 is sent to the control terminal through the secondary light sensor, the control terminal converts the collected light intensity into the content of ammonia nitrogen, and therefore the ammonia nitrogen content is tested, and detection operation is completed.
The invention has the following beneficial effects:
because the heating wire 22 is wound around the periphery of the reaction flask 72, the temperature inside the reaction flask 72 is uniform, the influence of temperature unevenness on the measurement structure is eliminated, and meanwhile, the temperature sensor 27 realizes accurate control on the reaction temperature, so that the reaction is carried out under a constant temperature condition, and the influence of temperature difference on the measurement structure is eliminated; and the influence that the change of light source light intensity caused to the measuring result has been eliminated in setting up of contrast light beam, the dislocation of light source emitter 81 and fixed column 24 for reaction flask 72 can heat evenly, and heater strip 22 still can not influence the light intensity of detecting light beam simultaneously, possesses the advantage that measurement accuracy is high, structural arrangement is reasonable.
Example two
The difference from the first embodiment is that, as shown in fig. 1 and 5, the online water quality monitor further includes two electromagnetic valves 33, the two electromagnetic valves 33 are respectively located at two ends of the mounting shell 71 and are communicated with the reaction flask 72 through a conduit, and the electromagnetic valves 33 play a role in sealing, so as to prevent that steam escapes in the process of heating the reaction flask 72, which causes the change of the air pressure after the reactor returns to the normal temperature, and affects the measurement result.
Since the reagent for detecting the total phosphorus content contains corrosive reagent, the rotating disc 614, the fixed disc 615, the valve body seat 611 and the valve seat cover 612 of the ten-way valve 61 all adopt corrosion-resistant materials, and the service life of the ten-way valve 61 is prolonged.
The working process of the invention is as follows:
when the water quality monitor is used for detecting the total phosphorus content or the chemical oxygen demand in water, all required reagents are placed in the placing groove 5, the alkaline hypochlorous acid solution is placed in the containing groove 29 of the refrigerating device 28, the reagent bottles are communicated with the metering bottle 62 through the ten-way valve 61, various reagents enter the metering bottle 62 through the ten-way valve 61, after metering in the metering bottle 62 is completed, the metering bottle 62 is communicated with the reaction bottle 72 through the ten-way valve 61, and the reagents flow into the reaction bottle 72 through the ten-way valve 61 to complete sample feeding operation.
After all the reagents are added, the metering bottle 62 is communicated with the reaction bottle 72 through the ten-way valve 61, the reaction bottle 72 is bubbled through the peristaltic pump 63, the reagents in the reaction bottle 72 are uniformly mixed, the electromagnetic valve 33 is closed, then the reaction bottle 72 is heated through the heating wire 22, after the reaction bottle is heated to the specified temperature, the control terminal controls the heating wire 22 to stop heating, and the reaction bottle 72 is kept stand to wait for the reagents to react so as to complete the reaction operation.
The detection operation is the same as the first embodiment, and is not described herein again.
The invention has the following beneficial effects:
in the detection of the total phosphorus content and the chemical oxygen demand, the temperature in the reaction bottle 72 is usually higher, the amount of generated steam is more, the electromagnetic valve 33 plays a sealing role, the phenomenon that the steam escapes in the heating process of the reaction bottle 72, so that the air pressure of the reactor is changed after the reactor is restored to the normal temperature is avoided, the influence of the pressure change on the detection result is eliminated, and the measurement precision is higher. Other advantages are the same as those of the first embodiment, and are not described herein again.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. 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. A water quality monitor is characterized by comprising a machine shell (1), wherein a sample introduction device (6), a reaction device (7), a detection device (8) for detecting the absorbance of a sample and a control terminal are arranged in the machine shell (1);
the sample feeding device (6) comprises a ten-way valve (61), a metering bottle (62) and a peristaltic pump (63), wherein a main branch (9), nine branch paths (10) respectively communicated with the main branch (9) and a switching assembly used for communicating the main branch (9) with any one branch path (10) are arranged in the ten-way valve (61), the main branch (9) of the ten-way valve (61) is communicated with the metering pump through a conduit, and the peristaltic pump (63) is communicated with the metering bottle (62) through a conduit;
the reaction device (7) comprises a lighttight installation shell (71) and a reaction bottle (72), the reaction bottle (72) is positioned in the installation shell (71), heating wires (22) are arranged on the peripheral side of the reaction bottle (72), two fixing rings (23) for the heating wires (22) to pass through are respectively arranged on the peripheral side of the reaction bottle (72) at the two ends of the reaction bottle, fixing columns (24) for fixing the heating wires (22) are arranged between the fixing rings (23), the heating wires (22) are wound between the two fixing columns (24), the heating wires (22) are spirally wound on the peripheral side of the reaction bottle (72) between the adjacent fixing rings (23) and the fixing columns (24), a temperature groove (26) which extends downwards in an inclined manner towards the axis direction of the bottle body is arranged in the middle of the reaction bottle (72), and a temperature sensor (27) is arranged in the temperature groove (26), the reaction bottle (72) is communicated with any branch circuit (10) of the ten-way valve (61) through a conduit;
the detection device (8) comprises a light source emitter (81) and a primary optical sensor (82), the light source emitter (81) and the optical sensor are located at the same height and located on two sides of the installation shell (71) respectively, a light splitting sheet for splitting a light source into two light paths is arranged in the light source emitter (81), one light path is received by the secondary optical sensor of the light source emitter (81) and used as a contrast light beam, and the other light path irradiates the receiving end of the primary optical sensor (82) through the reaction bottle (72) and serves as a detection light beam;
the light source emitter (81) is positioned between the two fixed columns (24) and the axes of the fixed columns (24) are vertical to the path of the detection light beam, so that the detection light beam avoids the heating wire (22) when passing through the reaction bottle (72).
2. The water quality monitor according to claim 1, wherein the ten-way valve (61) comprises a valve body seat (611) and a valve seat cover (612), the main branch (9) and the branch (10) are circumferentially arranged on the periphery of the valve seat cover (612), the switching assembly comprises a motor (613), a rotating disc (614) and a fixed disc (615), the motor (613) is electrically connected with a control terminal, the rotating disc (614) is linked with the motor (613), the fixed disc (615) is in threaded connection with the valve seat cover (612), the fixed disc (615) is provided with a main groove (12) communicated with the main branch (9) towards the center of the rotating disc (614), the fixed disc (614) is provided with nine branch grooves (11) which are respectively communicated with the branch (10) one by one, and the switching groove(s) (for communicating the main groove (12) with any one branch groove (11) towards the disc surface of the fixed disc (614) 13) The switching groove (13) extends from the position of the main groove (12) to the position of the branch groove (11).
3. A water quality monitor according to claim 2, wherein a connector (19) for connecting the conduit with the branch line (10) or the main branch line (9) is screwed to the peripheral side of the valve seat cover (612), and a connection hole for inserting the catheter is formed in the connector (19).
4. A water quality monitor according to claim 1, wherein a plurality of spaced limiting protrusions (25) are provided between adjacent fixing rings (23) and fixing posts (24) on the peripheral side of the reaction flask (72), and the heating wire (22) is spirally passed through the gap between adjacent limiting protrusions (25).
5. The water quality monitor according to claim 1, wherein the fixing column (24) comprises a fixing section and a limiting section, the fixing section is fixed with the reaction bottle (72), and the limiting section is positioned at one end of the fixing section far away from the reaction bottle (72) and has a diameter larger than that of the fixing section.
6. A water quality monitor according to claim 1, wherein two electromagnetic valves (33) are respectively arranged at two ends of the installation shell (71) in the machine shell (1), the electromagnetic valves (33) are electrically connected with the control terminal, and the two electromagnetic valves (33) are respectively communicated with two ends of the reaction bottle (72) through guide pipes.
7. A water quality monitor according to claim 1, wherein a refrigerating device (28) for storing chemical reagents is arranged in the casing (1), the refrigerating device (28) comprises a refrigerating sheet (282), a refrigerating liner (283) and radiating fins (284), the refrigerating liner (283) is in contact with the cold end of the refrigerating sheet (282), the radiating fins (284) are in contact with the hot end of the refrigerating sheet (282), the refrigerating liner (283) is provided with a containing groove (29) for placing a reagent bottle, and heat-insulating asbestos (30) is arranged on the peripheral side of the refrigerating liner (283).
8. A water quality monitor according to claim 1, wherein a reagent placing table (4) is arranged below the ten-way valve (61) in the casing (1), and a plurality of cylindrical placing grooves (5) are formed in the placing table (4).
9. A water quality monitor according to claim 1, wherein the outer wall of the casing (1) is provided with a display screen (3), and the display screen (3) is electrically connected with a control terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910943673.3A CN110672595A (en) | 2019-09-30 | 2019-09-30 | Water quality monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910943673.3A CN110672595A (en) | 2019-09-30 | 2019-09-30 | Water quality monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110672595A true CN110672595A (en) | 2020-01-10 |
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ID=69080545
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910943673.3A Pending CN110672595A (en) | 2019-09-30 | 2019-09-30 | Water quality monitor |
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| Country | Link |
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| CN (1) | CN110672595A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514406A (en) * | 2021-06-15 | 2021-10-19 | 杭州谱育科技发展有限公司 | Water quality on-line monitoring system and method |
| CN115077597A (en) * | 2022-02-16 | 2022-09-20 | 山西路桥集团吕梁国道项目建设管理有限公司 | Intelligent monitoring device for automatic monitoring, detection and early warning of underground water |
-
2019
- 2019-09-30 CN CN201910943673.3A patent/CN110672595A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113514406A (en) * | 2021-06-15 | 2021-10-19 | 杭州谱育科技发展有限公司 | Water quality on-line monitoring system and method |
| CN113514406B (en) * | 2021-06-15 | 2024-03-29 | 杭州谱育科技发展有限公司 | Water quality on-line monitoring system and method |
| CN115077597A (en) * | 2022-02-16 | 2022-09-20 | 山西路桥集团吕梁国道项目建设管理有限公司 | Intelligent monitoring device for automatic monitoring, detection and early warning of underground water |
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