CN213364576U - Colorimetric measuring device for water quality analyzer - Google Patents

Abstract

The invention provides a colorimetric measuring device for a water quality analyzer, which comprises a light-emitting unit; the full spectrum detection unit comprises a detection unit shell, and a colorimetric pool, a parallel lens, a beam splitter and a reflector which are arranged in the detection unit shell; a light receiving unit; wherein the detection unit housing has a light inlet and two light outlets, the light inlet is connected with the light emitting unit through an optical fiber, and the light outlet is connected with the light receiving unit through an optical fiber; the cuvette has a first inner diameter section and a second inner diameter section with unequal inner diameters; the mirror is positioned such that a reflected beam of the beam splitter passes perpendicularly through the second inner diameter segment of the cuvette and exits the other of the light outlets. Utilize the utility model discloses, can solve the problem of water quality analyzer high concentration measurement and low concentration measurement restriction each other, improve water quality analyzer's suitability.

Description

Colorimetric measuring device for water quality analyzer

Technical Field

The invention belongs to the technical field of environmental monitoring, and relates to a colorimetric measuring device for a water quality analyzer.

Background

With the maturity of automation control technology and exponential increase of the demand of chemical analysis application occasions, the online water quality analyzer is in the beginning of the last 30-40 years. The water quality on-line analyzer is mainly used for monitoring the water quality of domestic water, sewage treatment and industrial process control.

The colorimetric measuring device is a core component of a colorimetric water quality automatic analyzer and generally comprises a light-emitting unit, a colorimetric pool and a light-receiving unit. The colorimetry realizes measurement mainly based on the Lambert beer law, that is, when a beam of parallel monochromatic light vertically passes through a uniform and non-scattering light-absorbing substance, the absorbance A of the light-absorbing substance is in direct proportion to the concentration c of the light-absorbing substance and the thickness b of an absorbing layer. Due to the limitation of electronic devices and other factors, the measurement range of absorbance in the prior art is limited, so that in actual measurement work, when the concentration of a measured substance is low or when lower detection limit is obtained, a colorimetric pool with a large light absorption layer thickness is often selected, and when a relatively higher measurement range is obtained, a colorimetric pool with a small light absorption layer thickness is often selected. In the field of environmental monitoring, particularly in the field of water environment on-line monitoring, the concentration of a substance to be detected is unknown, and the concentration difference of the substance to be detected is large in different occasions, so that the adaptability of the automatic water quality analyzer in different occasions is poor, and troubles are brought to the design and use of the automatic water quality analyzer and the selection of a colorimetric measuring device.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a colorimetric measuring device for a water quality analyzer, which is used for solving the technical problem that the high concentration and the low concentration of the colorimetric measuring device in the prior art are mutually restricted in the actual measuring process.

To achieve the above and other related objects, the present invention provides a colorimetric measuring device for a water quality analyzer, comprising:

a light emitting unit;

the full spectrum detection unit comprises a detection unit shell, and a colorimetric pool, a parallel lens, a beam splitter and a reflector which are arranged in the detection unit shell;

a light receiving unit;

wherein the detection unit housing has a light inlet and two light outlets, the light inlet is connected with the light emitting unit through an optical fiber, and the light outlet is connected with the light receiving unit through an optical fiber; the colorimetric pool is provided with a first inner diameter section and a second inner diameter section with unequal inner diameters, and a liquid inlet and an overflow port which are arranged at two ends of the colorimetric pool; the parallel lens, the beam splitter and the first inner diameter section of the colorimetric pool are sequentially arranged from the light inlet to the light outlet; the mirror is positioned such that a reflected beam of the beam splitter passes perpendicularly through the second inner diameter segment of the cuvette and exits the other of the light outlets.

In an alternative embodiment, the colorimetric measurement device further comprises a first focusing lens disposed between the first inner diameter section of the cuvette and one of the light outlets.

In an alternative embodiment, the colorimetric measurement device further comprises a second converging lens disposed between the second inner diameter section of the cuvette and the other of the light outlets.

In an alternative embodiment, the first inner diameter section is smaller in size than the second inner diameter section.

In an alternative embodiment, the first inner diameter section is larger in size than the second inner diameter section.

In an alternative embodiment, the lighting unit comprises a xenon lamp.

In an optional embodiment, the colorimetric measurement device further comprises a data processing control unit for controlling each electrical component in the colorimetric measurement device. In an optional embodiment, the liquid inlet is positioned at the lower end part of the colorimetric pool and is connected with a sample feeding device; the overflow port is positioned at the upper end part of the colorimetric pool and is connected with the liquid discharge pool.

In an alternative embodiment, the light receiving unit includes a receiving unit housing, a beam splitter, and a photosensor array; the receiving unit comprises a receiving unit shell, a photoelectric sensor array and a spectroscope, wherein a reflecting cavity for reflecting light beams is arranged in the receiving unit shell, an optical fiber socket for inserting optical fibers is formed in the side wall of one end of the reflecting cavity, the photoelectric sensor array is arranged on the side wall where the optical fiber socket is located, and the spectroscope is paved on the side wall opposite to the optical fiber socket.

In an alternative embodiment, the light receiving unit includes a first light receiving unit and a second light receiving unit respectively connected to the two light outlets of the detection unit housing through optical fibers.

The utility model discloses a colorimetric measurement device for water quality analyzer, its colorimetric pool include two internal diameter sections that the internal diameter is unequal, different internal diameter sections can form different solution and measure thickness, through the data acquisition subassembly that the internal diameter section corresponds separately, water quality analyzer can be according to its absorbance value of setting for, select the absorbance value of water sample in the suitable measuring section to carry out the calculation of water sample concentration to the problem of water quality analyzer high concentration measurement and low concentration measurement mutual restriction has been solved, water quality analyzer's suitability has been improved;

the utility model discloses a color comparison measuring device for water quality analyzer, through setting up beam splitter and speculum at colorimetric pool incident side, thereby can fall into two bundles of incident lights with the parallel light beam from the parallel lens outgoing, every bundle of incident light corresponds an internal diameter section, thereby can only set up a luminescence unit, just can provide the incident light for water quality analysis for each internal diameter section of colorimetric pool respectively, the component quantity of water quality analyzer has been reduced, both can reduce cost, can reduce water quality analyzer's volume again.

Drawings

Fig. 1 shows a schematic diagram of the pipeline connection of the water quality analyzer of the present invention.

Fig. 2 shows a schematic structural diagram of the colorimetric measuring device of the water quality analyzer of the present invention.

Fig. 3 shows a schematic structural diagram of the colorimetric pool of the colorimetric measuring device of the present invention.

Fig. 4 is a schematic structural diagram of the light receiving unit according to the present invention.

Fig. 5 is a schematic structural diagram of the digestion unit for the water quality analyzer of the present invention.

Element numbers:

100 digestion unit

101 ultraviolet lamp

102 digestion cavity

103 heating sheet

104 temperature sensor

200 colorimetric measuring device

210 colorimetric measuring device shell

220 luminous unit

230 full spectrum detection unit

231 parallel lens

232 beam splitter

233 reflecting mirror

234a first collecting lens

234b second focusing lens

235 colorimetric pool

2351 Overflow orifice

2352 first inner diameter section

2353 second inner diameter section

2354 liquid inlet

236 detection unit casing

240 light receiving unit

240a first light receiving unit

240b second light receiving unit

241 photoelectric sensor array

242 reflective cavity

243 receiving unit casing

244 optical fiber socket

245, 246 side wall

250, 260 optical fiber

300 data processing control unit

400 heat dissipation unit

500 peristaltic pump

600 heating unit

700a-700d first-fourth liquid container

801a-d first control valve

802 second control valve

803a,803b third control valve

804 fourth control valve

805 three-way control valve

Detailed Description

The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.

It should be understood that the structures, ratios, sizes, and the like shown in the drawings and described in the specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions under which the present invention can be implemented, so that the present invention has no technical significance, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

Referring to fig. 1, the present invention provides a colorimetric water quality analyzer, which mainly comprises a housing (not shown), a sample introduction device disposed in the housing, a colorimetric measurement device 200, a data processing control unit 300, and a display screen (not shown). Wherein, fig. 1 is a schematic diagram showing the pipeline connection of the water quality analyzer of the present invention; fig. 2 is a schematic structural diagram of a colorimetric measuring device 200 of a water quality analyzer according to the present invention; fig. 3 is a schematic structural diagram of a colorimetric cell 235 of the water quality analyzer according to the present invention; fig. 4 is a schematic structural diagram of the light receiving unit 240 of the water quality analyzer of the present invention; fig. 5 is a schematic structural diagram of the digestion unit 100 of the water quality analyzer of the present invention.

It should be noted that, in the utility model discloses in, data processing control unit 300 can adopt the singlechip for example, data processing control unit 300 can utilize electric line connection respectively for example the sampling device each electrical components in colorimetric measurement device 200 to show the result that detects for the user through the display screen. The display screen can adopt a touch screen, a user can select total phosphorus, total nitrogen, ammonia nitrogen, Chemical Oxygen Demand (COD), nitrate or turbidity of water to be detected by clicking the touch screen, and the data processing control unit 300 can start a corresponding control program according to an electric signal generated by clicking of the user on the touch screen to sequentially complete water quality detection.

Referring to fig. 1, in the present invention, the sample feeding device comprises a plurality of liquid containers for storing a sample to be tested, an oxidant and a display agent, a peristaltic pump 500, a digestion unit 100, a connection pipeline and a control valve disposed on the connection pipeline.

Referring to fig. 1, in the present invention, the number of the liquid containers may be set as required, in order to meet the test requirements of total phosphorus, total nitrogen, ammonia nitrogen, Chemical Oxygen Demand (COD), nitrate or turbidity, in this embodiment, the liquid containers at least include four liquid containers (fig. 4 shows a situation including four liquid containers), which are defined as a first liquid container 700a, a second liquid container 700b, a third liquid container 700c, and a fourth liquid container 700d, respectively, and the four liquid containers 700a-700d may contain different liquids according to the detection items, which will be specifically described later and will not be described herein again. The liquid inlet of the peristaltic pump 500 is respectively connected with the liquid containers 700a-700d through a plurality of first control valves 801a-801 d; specifically, the first liquid container 700a is connected to a liquid inlet of the peristaltic pump 500 through a first control valve 801a, the second liquid container 700b is connected to a liquid inlet of the peristaltic pump 500 through a first control valve 801b, the third liquid container 700c is connected to a liquid inlet of the peristaltic pump 500 through a first control valve 801c, and the fourth liquid container 700d is connected to a liquid inlet of the peristaltic pump 500 through a first control valve 801 d. A liquid inlet of the digestion unit 100 is connected with a liquid outlet of the peristaltic pump 500 through a second control valve 802, and a liquid outlet of the digestion unit 100 is connected with a liquid inlet of the peristaltic pump 500 through third control valves 803a and 803b in sequence. The line between the second control valve 802 and the peristaltic pump 500 is connected to a liquid inlet 2354 of the cuvette 235, which will be described later, via a fourth control valve 804. In this embodiment, for example, two-way solenoid valves may be used as the first control valves 801a to d, the second control valve 802, the third control valves 803a,803b, and the fourth control valve 804.

Referring to fig. 1, since the digestion process requires heating of the sample, the temperature of the digested sample is high, and in order to conveniently cool the digested sample, in an alternative embodiment, as shown in fig. 1, a heat radiating unit 400 is placed below the digestion unit 100, the heat dissipation unit 400 is disposed between the digestion unit 100 and the liquid inlet of the peristaltic pump 500, and, in particular, the heat radiating unit 400 is disposed between the third control valve 803a and the third control valve 803b, after the sample to be measured is digested, the third control valve 803a arranged on the pipeline between the liquid outlet of the digestion unit 100 and the heat dissipation unit 400 is controlled to be opened by the data processing control unit 300 only after the digestion unit 100 completes the digestion reaction, and the water sample digestion solution flows into the heat dissipation unit 400 from the liquid outlet of the digestion unit 100 through the third control valve 803a under the action of gravity; in the process, the third control valve 803b at the bottom of the digestion unit 100 is closed, the peristaltic pump 500 stops working, and the pipe wall of the second control valve 802 arranged between the peristaltic pump 500 and the liquid inlet of the digestion unit 100 prevents the water sample digestion liquid of the digestion unit 100 from flowing into the pipeline between the second control valve 802 and the peristaltic pump 500.

In order to simplify the pipeline connection manner of the colorimetric water quality analyzer and reduce the volume of the water quality analyzer, in this embodiment, as shown in fig. 1, the liquid inlet and the liquid outlet of the digestion unit 100 share one liquid inlet and outlet, the sample injection device further includes a three-way control valve 805, and three ports of the three-way control valve 805 are respectively connected to the second control valve 802, the third control valve 803a, and the liquid inlet and outlet of the digestion unit 100. It should be noted that, in order to facilitate the heat dissipation of the heat dissipation unit 400, in this embodiment, the heat dissipation unit 400 may be made of a glass material, and meanwhile, the diameter of the inner cavity of the heat dissipation unit 400 is significantly larger than the pipe diameter of the pipeline connected thereto, and the digested sample flows into the heat dissipation unit 400 under the action of gravity to dissipate heat. It will be appreciated that in other embodiments, the liquid inlet and the liquid outlet of the digestion unit 100 may be separate.

In an alternative embodiment, a temperature sensor (not shown) may be further fixed outside the sidewall of the heat dissipation unit 400, the temperature sensor is connected to the data processing control unit 300 through a wire, and the temperature sensor detects the temperature on the sidewall of the heat dissipation unit 400 to determine the temperature of the water sample digestion, wherein a set temperature may be preset in the temperature sensor, when the temperature collected by the temperature sensor is lower than the set temperature, the temperature sensor sends a signal to the data processing control unit 300 through a wire, the data processing control unit 300 controls the third control valve 803b at the bottom of the heat dissipation unit 400 to open, and the peristaltic pump 500 is started to inject the water sample digestion solution in the heat dissipation unit 400 and the color developing agent in the solution container into the cuvette 235 in the colorimetric measurement device 200, and complete mixing during transportation. It should be noted that, in order to improve the heat dissipation efficiency of the heat dissipation unit 400, a heat dissipation fan may be fixed at a position close to the heat dissipation unit 400.

In an optional embodiment, when the colorimetric water quality analyzer is used for measuring ammonia nitrogen in water, a water sample to be measured of three color developers of mixed oil needs to be heated, so a heating unit 600 may be disposed in a sample injection device of the water quality analyzer, and a pipeline between the second control valve 802 and the peristaltic pump 500 is connected with the inlet 2354 of the cuvette 235 through the fourth control valve 804 and the heating unit 600 in sequence.

Referring to fig. 1-3, in the present embodiment, the colorimetric measurement device 200 includes a colorimetric measurement device housing 210, and a light emitting unit 220, a full spectrum detection unit 230, and a light receiving unit 240 disposed inside the colorimetric measurement device housing 210; the full spectrum detection unit 230 includes a detection unit housing 236, a colorimetric cell 235 disposed in the detection unit housing 236, a parallel lens 231, a beam splitter 232, and a reflector 233, where the beam splitter 232 is an optical device capable of splitting a beam into two or more beams. The sensing unit housing 236 has a light inlet and two light outlets, the light inlet of the sensing unit housing 236 is connected to the light emitting unit 220 through an optical fiber 250, and the light outlet is connected to the light receiving unit 240 through an optical fiber 260.

Referring to fig. 1 to 3, in the present embodiment, the internal cross section of the cuvette 235 may be, for example, a rectangle, and has a first inner diameter section 2352 and a second inner diameter section 2353 (when the cross section is a rectangle, the inner diameter refers to a side length of the rectangle parallel to one side of a light ray), which have unequal inner diameters, and a liquid inlet and an overflow outlet 2351 disposed at two ends of the cuvette 235; the collimator lens 231 is disposed at a side close to the light inlet of the detection unit housing 236; the collimator lens 231, the beam splitter 232, and the first inner diameter section 2352 of the cuvette 235 are sequentially disposed from the light inlet to one of the light outlets; the mirror 233 is positioned such that the reflected beam of the beam splitter 232 passes perpendicularly through the second inner diameter section 2353 of the cuvette 235 and exits the other of the light outlets. It is noted that while fig. 3 illustrates the first inner diameter segment 2352 having a size that is less than the size of the second inner diameter segment 2353, it is to be understood that in some embodiments, the first inner diameter segment 2352 may have a size that is greater than the size of the second inner diameter segment 2353. The colorimetric pool 235 of the colorimetric measuring device 200 of the present invention comprises different inner diameter sections capable of forming different solution measurement thicknesses, and the water quality analyzer can select the absorbance value of the water sample in a proper measurement section to calculate the water sample concentration according to the set absorbance value, thereby solving the problem of mutual restriction between high concentration measurement and low concentration measurement of the water quality analyzer and improving the applicability of the water quality analyzer; the liquid inlet 2354 is located at the lower end of the cuvette 235, the liquid inlet 2354 is connected to the sample injection device, the overflow outlet 2351 is located at the upper end of the cuvette 235, and the overflow outlet 2351 may be connected to a liquid discharge tank disposed outside the colorimetry water quality analyzer, for example.

The beam splitting diaphragm 232 is positioned between the collimating lens 231 and the cuvette 235, the beam splitting diaphragm 232 having a first opening opposite a first inner diameter section 2352 of the cuvette 235 and a second opening opposite a second inner diameter section 2353 of the cuvette 235.

Referring to fig. 1-3, in the present embodiment, the colorimetric measuring device 200 further includes a first collecting lens 234a disposed between the first inner diameter section 2352 of the cuvette 235 and the light outlet (corresponding to the upper light outlet in fig. 2), for collecting the light transmitted through the first inner diameter section 2352 and guiding the collected light to the optical fiber socket 244 of the first light receiving unit 240a to be described later through the optical fiber 260 for measurement; the colorimetric measurement device 200 further includes a second collecting lens 234b disposed between the second inner diameter section 2353 of the cuvette 235 and another light outlet (corresponding to the lower light outlet in fig. 2), for collecting the light transmitted through the second inner diameter section 2353 and transmitting the light to the second light receiving unit 240b through the optical fiber 260.

It should be noted that, although only the case where the cuvette 235 includes two inner diameter sections is shown in this embodiment, it can be understood that the technical solution of the present invention is also applicable to the case where the cuvette 235 includes three or more inner diameter sections, except that a corresponding optical path detection system needs to be additionally added.

Referring to fig. 2, in the present embodiment, the light emitting unit 220 may adopt a xenon lamp, for example, after the xenon lamp is turned on, light emitted by the xenon lamp reaches the light inlet of the full spectrum detecting unit 230 through the optical fiber 250, and the light beam is changed into parallel light through the parallel lens 231 in the full spectrum detecting unit 230. When parallel light incides on the beam splitter 232, partly light passes shine behind the beam splitter 232 first internal diameter section 2352 of colorimetric pool 235, and another part light by beam splitter 232 reflects, and light after the reflection shines after the reflection of speculum 233 second internal diameter section 2353 of colorimetric pool 235, and partly light is absorbed by the material that contains of the interior liquid of colorimetric pool 235, and other part parallel light passes on the colorimetric pool 235 assembles to the optic fibre 260 of full spectrum detecting element 230's light exit through corresponding convergent lens, in the optic fibre 260 conduction to corresponding light receiving element in the light exit 240.

Referring to fig. 2, in the present embodiment, the light receiving unit 240 includes a first light receiving unit 240a and a second light receiving unit 240b respectively connected to the two light outlets of the detecting unit housing 236 through optical fibers 260, the first light receiving unit 240a is configured to detect light passing through a first inner diameter section 2352 of the cuvette 235, and the second light receiving unit 240b is configured to detect light passing through a second inner diameter section 2353 of the cuvette 235.

The utility model discloses the colorimetric measurement device 200 that fig. 2 shows carries out the measuring test principle as follows:

a sample is added to the cuvette 235 by a sample injection device, each inner diameter section is filled with a sample, the light emitting unit 220 and the light receiving unit 240 are started to detect the absorbance value of each inner diameter section, taking the size of the second inner diameter section 2353 as an example larger than the size of the first inner diameter section 2352, when the absorbance value of the second inner diameter section 2353 is not larger than the corresponding preset absorbance value, the absorbance value of the second inner diameter section 2353 is used to calculate the concentration of the sample, when the absorbance value of the second inner diameter section 2353 is larger than the corresponding preset absorbance value, the absorbance value of the first inner diameter section 2352 is compared with the corresponding preset absorbance value, when the absorbance value of the first inner diameter section 2352 is not larger than the corresponding preset absorbance value, the absorbance value of the first inner diameter section 2352 is used to calculate the concentration of the sample, otherwise, the test result is invalid, and the sample can be diluted and then measured.

Fig. 4 is a schematic structural diagram of the optical receiver of the present embodiment, please refer to fig. 4, the optical receiving unit 240 includes a receiving unit casing 243, a waveband beam splitter for splitting the received light into different nanometer wavelengths, and a plurality of photosensor arrays 241 for detecting light beams of different wavebands; a reflection cavity 242 for reflecting light beams is arranged in the receiving unit casing 243, an optical fiber socket 244 into which an optical fiber 260 is inserted is formed in a side wall 246 (a right side wall in fig. 4) at one end of the reflection cavity 242, the side wall 246 where the optical fiber socket 244 is located and a side wall 245 (a left side wall in fig. 4) opposite to the optical fiber socket 244 are arc-shaped side walls with the same curvature radius, a plurality of photoelectric sensor arrays 241 are arranged on the side wall 246 where the optical fiber socket 244 is located, the spectroscope is laid on the side wall 245 opposite to the optical fiber socket 244, and the specific arrangement position of each photoelectric sensor array 241 can be adjusted according to the radian of the optical fiber socket 244 and the arc-shaped side wall and the corresponding light beam band. The light receiving unit 240 may divide the received light into bands with different nanometer wavelengths by using a spectroscope, and project the light with different bands onto corresponding photoelectric sensor arrays 241, and the data processing control unit 300 collects corresponding absorbances through the photoelectric sensor arrays 241. Because the concentration of the liquid substance in the cuvette 235 is in a linear direct proportion with the light absorbed by the specific waveband of the substance, the concentration of the substance in the solution can be calculated according to the light energy (i.e., absorbance) absorbed by the specific waveband, wherein the wavebands corresponding to different substances to be measured are different, so that the interference of other substances to the substances to be measured can be avoided.

Before starting the measurement, the colorimetric device 200 may be calibrated to obtain a calibration coefficient, which is the concentration/absorbance of the calibration solution; for example, the calibration solution in the calibration solution container may be pumped into the colorimetric measurement device 200 by the peristaltic pump 500, and the absorbance of the calibration solution may be measured to obtain the calibration coefficient. When performing the measurement, the data processing control unit 300 may obtain a specific measurement value according to a calibration coefficient set in advance, where the measurement value is the calibration coefficient × absorbance.

As shown in fig. 5, in the present embodiment, a digestion chamber 102 is provided in the digestion unit 100, a liquid inlet and a liquid outlet of the digestion chamber 102 are correspondingly installed, and the liquid outlet is directly connected with a liquid discharge pipe. A heating piece 103 is wrapped outside the digestion cavity 102, and a temperature sensor 104 is embedded between the heating piece 103 and the digestion cavity 102, and the temperature sensor 104 is used for detecting the digestion reaction temperature in the digestion cavity 102 in real time. An ultraviolet lamp 101 is inserted into the digestion chamber 102, and the ultraviolet lamp 101 is arranged coaxially with the digestion chamber 102. The ultraviolet lamp 101 emits ultra-short ultraviolet UVC. The ultraviolet light has a catalytic effect on partial chemical reaction, can be used for digesting the total phosphorus, reduces the digestion reaction temperature, and does not need additional pressurization. As an example, the digestion chamber 102 may be designed as a hollow sandwich, for example, a liquid inlet of the digestion chamber 102 is communicated with one end of the digestion chamber 102, a liquid outlet of the digestion chamber 102 is communicated with the other end of the digestion chamber 102, and a sample injected into the digestion unit 100 enters the sandwich for digestion reaction. As an example, the outer wall of the digestion chamber 102 may be coated with an insulating layer, for example, to insulate light from uv light. As an example, an insulating layer may also be wrapped outside the digestion unit 100, for example, to prevent heat of the heating sheet 103 from overflowing.

In this embodiment, as shown in fig. 5, the ultraviolet lamp 101, the heating sheet 103 and the temperature sensor 104 are respectively electrically connected to the data processing control unit 300, and the data processing control unit 300 controls the operations of the ultraviolet lamp 101 and the heating sheet 103. In the heating process, corresponding set temperatures are preset in the temperature sensor 104 for different measured substances, the data processing control unit 300 selects the set temperature according to the received corresponding electric signals of the sample to be detected, and controls the heating sheet 103 to heat, when the temperature sensor 104 detects that the temperature in the digestion cavity 102 reaches the set temperature, an electric signal is generated and sent to the data processing control unit 300, the data processing control unit 300 controls the working frequency of the heating sheet 103, the temperature in the cavity of the digestion unit 100 is guaranteed to be maintained at the set temperature until the preset time is reached, and then the ultraviolet lamp 101 and the heating sheet 103 are turned off.

According to the pipeline system, the test process is explained aiming at six parameters of total phosphorus, total nitrogen, ammonia nitrogen, Chemical Oxygen Demand (COD), nitrate and turbidity respectively:

as shown in fig. 1, the total phosphorus measurement procedure is as follows:

digestion step: starting the peristaltic pump 500, controlling the first control valves 801a and 801b, controlling the second control valve 802 to be opened, opening the three-way control valve 805 to enable the liquid outlet of the peristaltic pump 500 to be communicated with the pipeline between the digestion units 100, enabling other control valves to be in a closed state, respectively pumping the sample and the oxidant from the first liquid container 700a and the second liquid container 700b by the peristaltic pump 500 after the sample and the oxidant are mixed in the pipeline, pumping the mixture into the digestion units 100 by the peristaltic pump 500 to perform digestion reaction, and obtaining the water sample digestion solution after the digestion reaction is completed.

Cooling: the three-way control valve 805 disconnects the connection between the digestion unit 100 and the liquid outlet of the peristaltic pump 500, and conducts the pipeline between the digestion unit 100 and the heat dissipation unit 400, that is, opens the third control valve 803a, and closes all the other control valves, at this time, under the action of gravity, the digestion liquid falls into the heat dissipation unit 400 through the pipeline between the digestion unit 100 and the heat dissipation unit 400. After the heat is dissipated to the set temperature in the heat dissipating unit 400, the third control valve 803b of the on-off valve at the bottom of the heat dissipating unit 400 may be opened.

And (3) total phosphorus measurement: and opening the third control valve 803b, the fourth control valve 804, the first control valves 801c and 801d, and keeping the other control valves in a pipe wall state, respectively pumping the water sample digestion solution in the heat dissipation unit 400 and the display agents in the third container 700c and the third container 700d into the pipeline by the peristaltic pump 500, mixing the water sample digestion solution and the display agents in the third container 700c and the third container 700d, pumping the mixture into the colorimetric pool 235 in the colorimetric measuring device 200, and measuring the total phosphorus value. The measured water sample digestion solution is discharged out of the analyzer from the overflow port 2351.

As shown in fig. 1, the total nitrogen measurement test procedure is as follows:

digestion step: starting the peristaltic pump 500, controlling the first control valves 801a and 801b, controlling the second control valve 802 to be opened, opening the three-way control valve 805 to enable the liquid outlet of the peristaltic pump 500 to be communicated with the pipeline between the digestion units 100, enabling other control valves to be in a closed state, respectively pumping the sample and the oxidant from the first liquid container 700a and the second liquid container 700b by the peristaltic pump 500 after the sample and the oxidant are mixed in the pipeline, pumping the mixture into the digestion units 100 by the peristaltic pump 500 to perform digestion reaction, and obtaining the water sample digestion solution after the digestion reaction is completed.

Cooling: the three-way control valve 805 disconnects the connection between the digestion unit 100 and the liquid outlet of the peristaltic pump 500, and conducts the pipeline between the digestion unit 100 and the heat dissipation unit 400, that is, opens the third control valve 803a, and closes all the other control valves, at this time, under the action of gravity, the digestion liquid falls into the heat dissipation unit 400 through the pipeline between the digestion unit 100 and the heat dissipation unit 400. After the heat is dissipated to the set temperature in the heat dissipating unit 400, the third control valve 803b of the on-off valve at the bottom of the heat dissipating unit 400 may be opened.

And (3) total phosphorus measurement: and opening the third control valve 803b, the fourth control valve 804, the first control valves 801c and 801d, and keeping the other control valves in a pipe wall state, respectively pumping the water sample digestion solution in the heat dissipation unit 400 and the display agents in the third container 700c and the third container 700d into the pipeline by the peristaltic pump 500, mixing the water sample digestion solution and the display agents in the third container 700c and the third container 700d, pumping the mixture into the colorimetric pool 235 in the colorimetric measuring device 200, and measuring the total nitrogen value. The measured water sample digestion solution is discharged out of the analyzer from the overflow port 2351.

As shown in fig. 1, the ammonia nitrogen measurement test procedure is as follows:

ammonia nitrogen measurement: the peristaltic pump 500 is started, the first control valves 801a, 801b, 801c and 801d are controlled, other control valves are closed, the peristaltic pump 500 pumps the water sample and the three color developing reagents out of the first liquid container, the fourth liquid container 700a and the fourth liquid container 700d respectively, the water sample and the three color developing reagents are mixed in the pipeline and then pumped into the heating unit 600, after the heating unit 600 is heated for 3 minutes, the fourth control valve 804 is opened, the mixed liquid in the heating unit 600 is pumped into the colorimetric pool 235 in the colorimetric measuring device 200 through the peristaltic pump 500, and the ammonia nitrogen value is measured.

As shown in fig. 1, the Chemical Oxygen Demand (COD), nitrate, turbidity test procedures were as follows:

a measurement step: the peristaltic pump 500 is started, the first control valve 801a and the fourth control valve 804 are controlled, other control valves are closed, and the peristaltic pump 500 pumps the water sample from the first liquid container into the colorimetric pool 235 in the colorimetric measuring device 200 to measure Chemical Oxygen Demand (COD), nitrate and turbidity.

It should be noted that, in the measurement process, before each measurement, the measurement pipeline related to the water quality analyzer needs to be cleaned, so that cross contamination is avoided, and the measurement accuracy is ensured.

To sum up, the utility model discloses a colorimetric measurement device for water quality analyzer, its colorimetric pool include two internal diameter sections that the internal diameter is unequal, different internal diameter sections can form different solution and measure thickness, through the data acquisition subassembly that the internal diameter section corresponds separately, water quality analyzer can be according to its absorbance value of setting for, select the absorbance value of water sample in the appropriate measurement section to carry out the calculation of water sample concentration to the problem of water quality analyzer high concentration measurement and the mutual restriction of low concentration measurement has been solved, water quality analyzer's suitability has been improved; the utility model discloses a colorimetric measurement device for water quality analyzer through set up beam splitter and speculum at colorimetric pool incident side to can divide into two bundles of incident lights from the parallel light beam of parallel lens outgoing, every bundle of incident light corresponds an internal diameter section, thereby can only set up a luminescence unit, just can provide the incident light for water quality analysis for each internal diameter section of colorimetric pool respectively, has reduced water quality analyzer's component quantity, both can reduce cost, can reduce water quality analyzer's volume again; the utility model discloses a colorimetry water quality analyzer only needs a peristaltic pump can accomplish colorimetry water quality analyzer's measurement, and holistic flow path is simple, reduces the later maintenance cost. Effectively overcomes various defects in the prior art and has high industrial utilization value. Therefore, the utility model effectively overcomes various defects in the prior art and has high industrial utilization value.

In the description herein, numerous specific details are provided, such as examples of components and/or methods, to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

The above description of illustrated embodiments of the invention, including what is described in the abstract of the specification, is not intended to be exhaustive or to limit the invention to the precise forms disclosed herein. While specific embodiments of, and examples for, the invention are described herein for illustrative purposes only, various equivalent modifications are possible within the spirit and scope of the present invention, as those skilled in the relevant art will recognize and appreciate. As noted, these modifications may be made to the present invention in light of the foregoing description of illustrated embodiments of the invention and are to be included within the spirit and scope of the present invention.

The system and method have been described herein in general terms as providing details to facilitate the understanding of the invention. Furthermore, various specific details have been given to provide a general understanding of the embodiments of the invention. One skilled in the relevant art will recognize, however, that an embodiment of the invention can be practiced without one or more of the specific details, or with other apparatus, systems, assemblies, methods, components, materials, parts, and/or the like. In other instances, well-known structures, materials, and/or operations are not specifically shown or described in detail to avoid obscuring aspects of embodiments of the invention.

Thus, although the present invention has been described herein with reference to particular embodiments thereof, freedom of modification, various changes and substitutions are intended in the foregoing disclosure, and it should be understood that in some instances some features of the present invention will be employed without a corresponding use of other features without departing from the scope and spirit of the present invention as set forth. Accordingly, many modifications may be made to adapt a particular situation or material to the essential scope and spirit of the present invention. It is intended that the invention not be limited to the particular terms used in following claims and/or to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include any and all embodiments and equivalents falling within the scope of the appended claims. Accordingly, the scope of the invention is to be determined solely by the appended claims.

Claims (10)

1. A colorimetric measurement device for a water quality analyzer, comprising:

a light emitting unit;

the full spectrum detection unit comprises a detection unit shell, and a colorimetric pool, a parallel lens, a beam splitter and a reflector which are arranged in the detection unit shell;

a light receiving unit;

wherein the detection unit housing has a light inlet and two light outlets, the light inlet is connected with the light emitting unit through an optical fiber, and the light outlet is connected with the light receiving unit through an optical fiber; the colorimetric pool is provided with a first inner diameter section and a second inner diameter section with unequal inner diameters, and a liquid inlet and an overflow port which are arranged at two ends of the colorimetric pool; the parallel lens, the beam splitter and the first inner diameter section of the colorimetric pool are sequentially arranged from the light inlet to the light outlet; the mirror is positioned such that a reflected beam of the beam splitter passes perpendicularly through the second inner diameter segment of the cuvette and exits the other of the light outlets.

2. A colorimetric measurement device for a water quality analyzer in accordance with claim 1, further comprising a first focusing lens disposed between the first inner diameter section of the cuvette and the light outlet.

3. A colorimetric measurement device for a water quality analyzer in accordance with claim 1, further comprising a second converging lens disposed between the second inner diameter section of the cuvette and the other of the light outlets.

4. A colorimetric measurement device for a water quality analyzer in accordance with claim 1, wherein the first inner diameter section has a size smaller than that of the second inner diameter section.

5. A colorimetric measurement device for a water quality analyzer in accordance with claim 1, wherein the first inner diameter section has a size larger than that of the second inner diameter section.

6. The colorimetric measurement device for a water quality analyzer according to claim 1, wherein the light emitting unit includes a xenon lamp.

7. A colorimetric measurement device for a water quality analyzer in accordance with claim 1, further comprising a data processing control unit for controlling each electrical component in the colorimetric measurement device.

8. The colorimetric measurement device for a water quality analyzer according to claim 1, wherein the liquid inlet is located at a lower end of the colorimetric cell, and the liquid inlet is connected with a sample introduction device; the overflow port is positioned at the upper end part of the colorimetric pool and is connected with the liquid discharge pool.

9. A colorimetric measurement device for a water quality analyzer in accordance with any one of claims 1 to 8, wherein the light receiving unit comprises a receiving unit housing, a spectroscope and a photosensor array; the receiving unit comprises a receiving unit shell, a photoelectric sensor array and a spectroscope, wherein a reflecting cavity for reflecting light beams is arranged in the receiving unit shell, an optical fiber socket for inserting optical fibers is formed in the side wall of one end of the reflecting cavity, the photoelectric sensor array is arranged on the side wall where the optical fiber socket is located, and the spectroscope is paved on the side wall opposite to the optical fiber socket.

10. A colorimetric measurement device for a water quality analyzer in accordance with claim 9, wherein the light receiving unit comprises a first light receiving unit and a second light receiving unit which are connected to the two light outlets of the detection unit housing through optical fibers, respectively.

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