CN214472723U - Colorimetric device with digestion function for online analyzer - Google Patents
Colorimetric device with digestion function for online analyzer Download PDFInfo
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- CN214472723U CN214472723U CN202022894711.1U CN202022894711U CN214472723U CN 214472723 U CN214472723 U CN 214472723U CN 202022894711 U CN202022894711 U CN 202022894711U CN 214472723 U CN214472723 U CN 214472723U
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Abstract
The utility model relates to a colorimetric device with digestion function for an on-line analyzer, which comprises a shell, a cuvette, a heating wire and a cooling fan, wherein the cuvette is fixedly arranged in the shell through an upper end fixing part and a lower end fixing part, the heating wire is wound on the outer surface of the cuvette, the cooling fan is arranged at the rear side of the cuvette, the left side and the right side of the shell are respectively provided with a circuit module, two light emitting diodes are welded on the circuit module at one side and are arranged up and down, two photodiodes are welded on the circuit module at the other side and are respectively arranged corresponding to the two light emitting diodes arranged up and down one by one, two side surfaces of the shell are respectively provided with a light source through hole for light sources of the light-emitting diode and the photodiode to pass through, the light-emitting diode positioned below is a white light diode, and the light filter is arranged in the light source through hole corresponding to the light-emitting diode. The utility model discloses simple structure connects through circuit module, has subtracted the cost of using optic fibre.
Description
Technical Field
The utility model relates to an online analysis field, especially chemical surface treatment, chemicals production technology process, water treatment are relevant promptly surface water, groundwater, industrial waste water, domestic wastewater, reuse water's analysis and detection process. In particular to a colorimetric device with digestion function for an on-line analyzer.
Background
In the on-line heavy metal detector, a photoelectric colorimetric method is a commonly used detection method.
The authorization notice number CN210665513U discloses a cuvette detection device for a total nitrogen online analyzer, which consists of a shell, an LED light emitter and a light receiver with a lens, and is characterized in that a fixed narrow-wavelength LED is used for improving the reliability of a light source, and a fixing mechanism adopts a quick assembly and disassembly design. The grant public number CN208012938U has disclosed a flexible module of clearing up with adjustable, has inlayed two high-pressure valves in clearing up the module, and one of them is fixed high-pressure valve, one is movable high-pressure valve, and the former is as cell upper end support piece, and the latter is used for adjusting fixed cell lower extreme, reaches the purpose that promotes change cell efficiency and compatible different length cells. The patent public No. CN202599813U discloses a colorimetric pool of a heavy metal on-line detector, which consists of a light-emitting diode, a photodiode, a cuvette with a digestion function and a cooling fan. It is characterized by integrating a reaction tank, a cooling tank and a colorimetric tank. An authorization notice number CN206945542U discloses an online total phosphorus and total nitrogen water quality monitor, the operation principle of which is that a reagent is pumped into a digestion tube through a peristaltic pump, a metering tube and a valve island module, and then total phosphorus and total nitrogen are respectively measured through photoelectric measurement and spectral measurement.
As can be seen from the typical art techniques described above, the need for a corresponding test can be met. However, there are still some disadvantages in some areas:
1.) fixed wavelength LEDs are generally inexpensive and typically have a continuous operating life of more than one year, so that the actual number of single purchases is small, which can cause difficulties in daily purchases, and the LEDs of different wavelengths need to be stocked separately.
2.) light emitting diodes and photodiodes are typically wired to a controller or circuit board, which is a solution where the measurement results are subject to high interference from the wired connections and are not easily maintained. Some better schemes are to make the light emitting diode and the photodiode on the controller or the circuit board and then connect the controller or the circuit board to the digestion pool module by using optical fibers, which utilizes the characteristic of small transmission loss of the optical fibers to light, and the scheme bears the extra cost of the optical fibers and adds a fault point and a maintenance point.
3.) when throwing into a certain amount of chemicals reagent in the cell each time, present technique is outside the color comparison device, through being equipped with emitting diode and photodiode's metering tube, peristaltic pump, the multiple-position switch valve combination use completion, and the reagent is firstly by the peristaltic pump through mostly the switch valve throw into the metering tube ration, then the multiple-position switch valve switches over to the passageway to the cell, and the last peristaltic pump reverse work is thrown into the cell with the chemicals in the metering tube. This design seems to be straightforward, and there are actually three drawbacks. Firstly, a separate metering tube is needed, and the integration level is not high. Secondly, the control step is open-loop control, the reagent actually injected into the cuvette cannot be ensured, and the leakage of mechanical parts can directly influence the detection result. Third, the metering tube usually only has two pairs of diodes to combine, and the volume of the reagent to be driven can only be two fixed volumes, so when a plurality of reagents need to be driven, the concentration and the volume of the reagent are limited.
4.) in principle, the cuvette is required to have the maximum transmittance under the condition of the empty inside, namely the voltage fed back by the photodiode is the maximum, the transmittance is the second transmittance when measuring a blank solution, and the transmittance of the discolored solution containing the sample to be measured is the lowest. In fact, most current cuvette designs are cylindrical, and when the cuvette is a cylindrical shape design, the transmittance of the empty cuvette is between that of the blank solution and that of the post-color-change solution, because the light emitting diode inevitably causes problems of scattering and refraction of light when penetrating the cylindrical cuvette. In this case, there is a great risk that, when for any reason the intended reagent is not efficiently pumped into the cuvette (e.g. a peristaltic pump failure), the transmittance of the empty cuvette is greater than that of the blank solution and the detection result is non-zero.
SUMMERY OF THE UTILITY MODEL
The utility model provides a solve above-mentioned technical problem, provide one kind and avoid using optic fibre, the color comparison device of function is cleared up in low cost's online analysis appearance area.
The technical scheme is as follows,
the colorimetric device with the digestion function for the online analyzer comprises a shell, a cuvette, a heating wire and a cooling fan, wherein the cuvette is fixedly arranged in the shell through an upper end fixing part and a lower end fixing part, the heating wire is wound on the outer surface of the cuvette, the cooling fan is arranged at the rear side of the cuvette, the colorimetric device is characterized in that a circuit module is respectively arranged at the left side and the right side of the shell, two light-emitting diodes are welded on the circuit module at one side and are arranged up and down, two photodiodes are welded on the circuit module at the other side, the two photodiodes are respectively arranged corresponding to the two light-emitting diodes which are arranged up and down one by one, light source through holes for the light sources of the two light-emitting diodes and the two photodiodes to pass through are respectively arranged on the two side surfaces of the shell, the light emitting diode positioned at the lower part is a white light diode, and a light filter is arranged in the light source through hole corresponding to the light emitting diode.
As a further improvement, light source channels are arranged on the inner sides of the two light source through holes above, and the light source channels extend to two sides of the upper half section of the cuvette.
As a further improvement, two light inlet channels are respectively arranged on two sides of the lower half section of the cuvette, the positions of the two light inlet channels respectively correspond to the white light diode and the photodiode which are arranged below, and the light inlet surfaces of the two light inlet channels are planes.
As a further improvement, the upper end fixing piece, the lower end fixing piece and the upper end and the lower end of the cuvette are both provided with sealing rings, wherein the sealing ring at the upper end is an O-shaped sealing ring, and the sealing ring at the lower end is a flat sealing ring.
As a further improvement, the shell comprises a shell body and a front baffle, and the front baffle is connected with the shell body through a quick-release structure.
As a further improvement, the quick release structure is designed to be a slot type, two sides of a front baffle mounting opening of the shell body are respectively provided with a slot, two sides of the front baffle are respectively provided with a clamping edge, and the front baffle is inserted into the slots from top to bottom through the clamping edges, so that the shell body and the front baffle are sealed to form an opaque box body.
As a further improvement, the shell body and the front baffle can be fixed through a knob.
As a further improvement, the upper end of the front baffle is also provided with an upward protruding hat brim structure, and the hat brim structure is provided with a multipurpose hole.
Advantageous effects
The beneficial effects are that: the utility model has simple structure, enhances the anti-interference capability and has more stable detection result; the cost of using optical fibers is reduced by the circuit module connection, and the maintenance is easy; the condition that the empty cuvette appears has been solved, and the device adopts closed-loop control, multiple protection, and the reliability is showing and is increasing.
Drawings
The present invention will be further described with reference to the accompanying drawings and embodiments.
FIG. 1 is an exploded view of the present invention;
fig. 2 is a left side view of the present invention;
fig. 3 is a sectional view of a-a portion of fig. 2.
Reference numbers in the figures:
1. casing 101, light source through hole 102, light source passageway
103. Housing body 1031, card slot 104 and front baffle
1041. Brim structure 1043 of the clip rim 1042 and multipurpose hole
105. Knob 2, cuvette 201, light inlet channel
2011. Light inlet surface 3, heating wire 4 and cooling fan
5. Upper end mounting 6, lower extreme mounting 7, circuit module
8. Light emitting diode 8', white light diode 9, photodiode
10. Optical filter 11, O-shaped sealing ring 12 and flat sealing ring
13. Outer cover
Detailed Description
In order to further understand and appreciate the structural features and advantages of the present invention, preferred embodiments and the accompanying drawings are described in detail as follows:
as shown in fig. 1-2, a colorimetric device with digestion function for an online analyzer comprises a housing 1, a cuvette 2, a heating wire 3 and a cooling fan 4, wherein the cuvette 2 is fixedly mounted in the housing 1 through an upper fixing member 5 and a lower fixing member 6, the heating wire 3 is wound on the outer surface of the cuvette 2, the binding route of the heating wire 3 on the outer surface of the cuvette 2 is limited by the protruding surface of the cuvette, the heating wire is wound upwards from the lower end of the cuvette 2 to the middle position of the cuvette 2, the cooling fan 4 is arranged at the rear side of the cuvette 2, a circuit module 7 is respectively arranged at the left side and the right side of the housing 1, the circuit module 7 is protected by an outer cover 13, two light emitting diodes 8 are welded on the circuit module at one side, the two light emitting diodes 8 are arranged up and down, two photodiodes 9 are welded on the circuit module at the other side, the two photodiodes 9 are respectively arranged corresponding to the two light emitting diodes 8 arranged up and down one by one, light source through holes 101 for light sources of the two light emitting diodes 8 and the two photodiodes 9 to pass through are respectively arranged on two side surfaces of the shell 1, wherein the light emitting diode 8' positioned below is a white light diode, the light filter 10 is arranged in the light source through hole corresponding to the light source through hole, the white light diode can cover the visible light wavelength range, and the light filter can be replaced according to different wavelength requirements during application instead of directly replacing the light emitting diodes. The light-emitting diode light-. The light emitting diode 8 and the photodiode 9 are welded on the circuit modules 7 at two sides, as a part of the circuit modules, and the signal acquisition and AD conversion are completed locally on the circuit modules, and the circuit modules communicate with a main controller or a circuit board through 485/232 communication. The advantage of this is that the digital signal is communicated to the main controller or circuit board, avoiding the influence of the wire itself on the analog signal when the wire is directly connected, and also saving the cost of using optical fiber. The modular design concept further improves the stability and reliability of the signal.
The inboard of two light source through-holes that are located the top all is equipped with light source channel 102, and light source channel 102 extends to the both sides of the first half section of cell 2 for confirm the liquid level, but light source channel gathering light source makes the light source directly shine on the cell.
Two light inlet channels 201 are respectively arranged on two sides of the lower half section of the cuvette 2, the positions of the two light inlet channels 201 respectively correspond to a white light diode and a photodiode which are arranged below, and light inlet surfaces 2011 of the two light inlet channels 201 are planes. The white light diode and the photodiode arranged below are used for measurement. The light inlet surface is designed to be a plane, so that the transmittance of the empty cuvette is equal to or lower than that of the blank solution. The advantage of doing so is that, when the solution did not effectively squeeze into the cell because of any fault reason, only through the transmittance detection singleton, can judge whether the cell is empty. As multiple protection, as mentioned above, the device cooperates with an injection pump or a plunger pump with an external direct quantitative function and cooperates with liquid level confirmation at the upper end inside the colorimetric device, so that the purpose of multiple protection can be achieved, the detection process can be effectively monitored, the detection reliability is obviously improved, and the application requirement of an unattended online analyzer is met.
The sealing rings are arranged between the upper end fixing part 5 and the lower end fixing part 6 and the upper end and the lower end of the cuvette 2, the sealing ring at the upper end is an O-shaped sealing ring 11, the sealing ring at the lower end is a flat sealing ring 12, and the cuvette 2 is pressed and fixed from bottom to top, so that the O-shaped sealing ring at the upper end is beneficial to sealing the upper port of the cuvette 2, the flat sealing ring for the lower end is large in contact area, and the port pressing of the colorimetric surface 2 is facilitated.
As a further improvement, in order to allow an aspect tester to check the reaction condition of the cuvettes in the shell, the shell 1 is designed to be a shell body 103 of a half-wrapped structure, a front baffle 104 is additionally arranged on the front side surface of the shell body 103 for sealing, and the front baffle 104 is connected with the shell body 103 through a quick-release structure. The quick release structure is designed to be a slot type, specifically, two sides of a front baffle mounting opening of the shell body 103 are respectively provided with a slot 1031, two sides of the front baffle 104 are respectively provided with a clamping edge 1041, and the front baffle 104 is inserted into the slot 1031 from top to bottom through the clamping edge 1041, so that the shell body 103 and the front baffle 104 are sealed to form a light-tight box body. And the shell body 103 and the front baffle 104 can be further fixed through a knob 105. The upper end of the front baffle 104 is further provided with a brim structure 1042 protruding upwards for blocking light from the top to avoid light leakage. The brim structure 1042 is provided with a multi-purpose hole 1043, so that the front baffle can be conveniently held by a hand during installation or disassembly, and a small rod-shaped object such as a screwdriver can penetrate through the multi-purpose hole under the condition of incapability of holding force, so that the front baffle can be conveniently lifted.
In practical application, the colorimetric device is not recommended to be matched with a metering tube for use, and is used for filling reagent into the cuvette by combining an injection pump or a plunger pump with a rotary valve or a valve group, and then observing whether the volume of solution in the cuvette reaches a predicted target or not through a pair of light emitting diodes and a photodiode at the upper end of the colorimetric device. The advantage of doing so is realized closed-loop control, and outside syringe pump or plunger pump itself have the ration function on the one hand, and the emitting diode and the photodiode of the inside upper end of colorimetric device on the other hand regard as the audit mechanism of liquid level, and whether the total volume of auditing stage nature accords with the total volume that the reagent was squeezed into. In addition, because a syringe pump or a plunger pump is used externally, the volume selection of each reagent is more flexible and is not limited by fixed volumes of the metering tube, and the integration level is further improved.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications of the shapes, structures, features and spirit described in the claims of the present invention should be included in the scope of the present invention.
Claims (8)
1. The colorimetric device with the digestion function for the online analyzer comprises a shell, a cuvette, a heating wire and a cooling fan, wherein the cuvette is fixedly arranged in the shell through an upper end fixing part and a lower end fixing part, the heating wire is wound on the outer surface of the cuvette, the cooling fan is arranged at the rear side of the cuvette, the colorimetric device is characterized in that a circuit module is respectively arranged at the left side and the right side of the shell, two light-emitting diodes are welded on the circuit module at one side and are arranged up and down, two photodiodes are welded on the circuit module at the other side, the two photodiodes are respectively arranged corresponding to the two light-emitting diodes which are arranged up and down one by one, light source through holes for the light sources of the two light-emitting diodes and the two photodiodes to pass through are respectively arranged on the two side surfaces of the shell, the light emitting diode positioned at the lower part is a white light diode, and a light filter is arranged in the light source through hole corresponding to the light emitting diode.
2. The colorimetric device with digestion function of the on-line analyzer according to claim 1, wherein light source channels are provided inside the two light source through holes located above, and the light source channels extend to both sides of the upper half section of the cuvette.
3. The colorimetric device with digestion function of the on-line analyzer according to claim 1, wherein two light inlet channels are respectively arranged on two sides of the lower half section of the cuvette, the two light inlet channels are respectively corresponding to a white light diode and a photodiode which are arranged below, and light inlet surfaces of the two light inlet channels are planes.
4. The colorimetric device with digestion function of the on-line analyzer according to claim 1, wherein sealing rings are respectively arranged between the upper end fixing member and the lower end fixing member and the upper end and the lower end of the cuvette, wherein the sealing ring at the upper end is an O-shaped sealing ring, and the sealing ring at the lower end is a flat sealing ring.
5. The colorimetric device with digestion function of the on-line analyzer according to claim 1, wherein the housing comprises a housing body and a front baffle, and the front baffle is connected with the housing body through a quick-release structure.
6. The colorimetric device with digestion function of the on-line analyzer according to claim 5, wherein the quick-release structure is designed as a slot-locking type, two sides of the mounting opening of the front baffle of the housing body are respectively provided with a slot, two sides of the front baffle are respectively provided with a locking edge, and the front baffle is inserted into the slots from top to bottom through the locking edges, so that the housing body and the front baffle are sealed to form an opaque box body.
7. The colorimetric device with digestion function for on-line analyzer of claim 6, wherein the housing body and the front baffle can be further fixed by a knob.
8. The colorimetric device with digestion function of the on-line analyzer according to claim 6, wherein an upwardly protruding cap structure is further provided at the upper end of the front baffle, and a multipurpose hole is provided on the cap structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022894711.1U CN214472723U (en) | 2020-12-03 | 2020-12-03 | Colorimetric device with digestion function for online analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022894711.1U CN214472723U (en) | 2020-12-03 | 2020-12-03 | Colorimetric device with digestion function for online analyzer |
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| Publication Number | Publication Date |
|---|---|
| CN214472723U true CN214472723U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022894711.1U Active CN214472723U (en) | 2020-12-03 | 2020-12-03 | Colorimetric device with digestion function for online analyzer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609279A (en) * | 2023-05-29 | 2023-08-18 | 上海博取仪器有限公司 | Calibrating device of water quality testing equipment light source |
-
2020
- 2020-12-03 CN CN202022894711.1U patent/CN214472723U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116609279A (en) * | 2023-05-29 | 2023-08-18 | 上海博取仪器有限公司 | Calibrating device of water quality testing equipment light source |
| CN116609279B (en) * | 2023-05-29 | 2023-12-22 | 上海博取仪器有限公司 | Calibrating device of water quality testing equipment light source |
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Address after: 201422 room 71, building 11, 171 Wusi Branch Road, Haiwan Town, Fengxian District, Shanghai Patentee after: Jitao Automation Technology (Shanghai) Co.,Ltd. Address before: 201422 room 71, building 11, 171 Wusi Branch Road, Haiwan Town, Fengxian District, Shanghai Patentee before: Shanghai Jitao Automation Technology Co.,Ltd. |
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