CN2250518Y - Ultraviolet spectrophotometer for on-line measurement - Google Patents
Ultraviolet spectrophotometer for on-line measurement Download PDFInfo
- Publication number
- CN2250518Y CN2250518Y CN 95216453 CN95216453U CN2250518Y CN 2250518 Y CN2250518 Y CN 2250518Y CN 95216453 CN95216453 CN 95216453 CN 95216453 U CN95216453 U CN 95216453U CN 2250518 Y CN2250518 Y CN 2250518Y
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- explosion
- cuvette
- light
- opticator
- proof tank
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Abstract
The utility model relates to an ultraviolet spectrophotometer for on-line measurement, comprising a sample injection and analyzer part, an electricity part, an optics part and an explosion-proof tank part. An optical system part, a flow heating type colourimetric container part and the electricity part are arranged in the explosion-proof tank, wherein, the optical system part and a colourimetric container device are fixedly arranged on a same bottom board which then is fixed on the bottom face of the explosion-proof tank, the electricity part is arranged in the other space in the tank, and meanwhile, cooling water also flows in the tank.
Description
The utility model relates to a kind of process analysis procedure analysis online in production of lube base oils and explosion-proof uv-spectrophotometric instrument, belongs to spectral measurement and analysis technical field.
So far, in petroleum refining process, the controlling index in the OIL IN LUBRICATING OIL PRODUCTION process is had: viscosity, viscosity index, acid number, colourity, ultraviolet light absorption coefficient etc.Wherein, the measurement of the ultraviolet light absorption coefficient in the relevant oil product production run generally is by artificial sample, weigh, join standard solution, dilute sample, on the uv-spectrophotometric instrument of breadboard standard, carry out, rather than on-line measurement.Usually, sample of manual analysis needs 2～3 hours, and the most of the time is used for the processing of sample, and needs different propane or other dilution of spectral order.Therefore, with duration, expense height and to operative skill certain requirement is arranged.
The purpose of this utility model is, a kind of ultraviolet spectrometry spectrometer that sample in the production of lube base oils is carried out on-line measurement is provided, wherein utilize the Holographic Blazed Grating monochromator as beam splitting system, the mobile cuvette device of adapted heated type, and the explosion-proof casing of flame-proof type explosion-proof form.
Above-mentioned purpose of the present utility model reaches by following technical proposals.The uv-spectrophotometric instrument that a kind of on-line measurement is used, it comprises: sample introduction and analyzer part, electricity part, opticator, it is characterized in that, also comprise the explosion-proof tank part, described sample introduction and analyzer part are by filtrator, fixed displacement pump, throttling valve, the heated type cuvette device that flows, and instrument wind or steam pipeline purging composition, wherein said mobile heated type cuvette device is by temperature relay, and heat shield and two heating iron cores constitute; Described explosion-proof tank is provided with opticator in it, heated type cuvette part flows, with the electricity part, wherein with opticator and cuvette device fixed in position on same base plate, then base plate is fixed on the bottom surface of explosion-proof tank, its complementary space is settled the electricity part in the case, simultaneously, also feeds chilled water in the case; Described opticator comprises, the double grating beam splitting system, wherein panchromatic light (L) the line focus mirror (M1) that is sent by deuterium lamp stitches (S1) to cuvette (C) and incident, be divided into monochromatic light by the light after the absorption of sample through grating (G1), the monochromatic light of required wavelength is passed through the centre joint (S2), be mapped to grating (G2) through reflective mirror (M2) again, beam split obtains low spuious monochromatic light once more, through going out seam (S3) to photoelectric commutator; The output electric signal.Described mobile heated type cuvette device has three positions when working, that is, analysis position makes light path pass through the middle sample to be analyzed of cuvette; Zero check is put, and makes the light path retaining between cuvette and reference light damping plate, the zero point that is used to proofread light path part and circuit part; The extinction scale finishes the position, and light path is passed through in the middle of the reference light damping plate, is used to demarcate the accuracy of spectroscope institute cls analysis value.
The technical solution of the utility model is described in detail with embodiment below in conjunction with accompanying drawing.
Fig. 1 represents the main one-piece construction of the online uv-spectrophotometric instrument of the utility model and the synoptic diagram of ingredient thereof.
The synoptic diagram of the two light grating beam splitting light paths of beam splitting system shown in Fig. 2 presentation graphs 1.
The structural representation of the mobile cuvette device of heated type shown in Fig. 3 presentation graphs 1.
Referring to accompanying drawing 1, online uv-spectrophotometric instrument of the present utility model can be divided into four major parts basically:
1. sample introduction and analyzer part:
This part is by filtrator 1.1, fixed displacement pump 1.2, throttling valve 1.3, and compositions such as heated type cuvette device 1.4, instrument wind or steam pipeline purging 1.5 flow.To guarantee that qualified analytic sample 1.0 enters cuvette.Cuvette can prevent that for the analyzer of the heated type that flows oil product from solidifying, and guarantees that the light path of analytic sample is certain.Three working positions are arranged, that is, a position is the detection position, and this moment, light path was analyzed by sample.Another position is the zero correction position, is used to proofread instrument, adjusts the zero point of electro-optical system.The 3rd position is reference check and correction position, is used to proofread the accuracy (also can proofread the accuracy of absorbance A by the standard proof) that absorbance A is analyzed.Outside the explosion-proof tank 2.1 of photometer, be provided with and have steam tracing and instrument wind or steam blowing equipment 1.5.Oil extraction can select single pump or double pump to carry out according to the pressure condition of oil return pipeline 1.6.This part also comprises standard sample inlet and thief hatch 1.8, so that demarcate.
2. explosion-proof tank part.
Referring to accompanying drawing 1, electricity part of the present utility model, double grating beam splitting system part, heated type cuvette part all is arranged in the explosion-proof tank 2.1, in case, also have chilled water 3.0 to feed, to take away the heat of heater element, reduce the work drift of light/power conversion device, improve adaptive faculty to the industry spot environment.
3. electricity part.
Referring to accompanying drawing 1, this part has ultraviolet source power source special 3.2, and it is a power supply with self-starting, constant current, guarantees the ultraviolet source 3.1 that provides stable under the industry spot environment.Next is the high-voltage power supply 3.3 of photoelectric commutator 3.4 usefulness, makes switching device have adjustable high light/electricity conversion, amplification effect.The 3rd is that signal amplifies 3.5 and logarithm operation 3.6, and absorptivity computing 3.7 and V/I change-over circuit 3.8 amplify electric signal, computing and convert required absorbance to or the absorptivity value.Above-mentioned various piece all is arranged in the above-mentioned explosion-proof tank.Change registering instrument 3.9 over to and write down or show by above-mentioned absorbance or absorptivity value through V/I conversion.
4. opticator.
Optical system of the present utility model mainly is meant the double grating beam splitting system 4.1 shown in the accompanying drawing 1, and it is arranged in the explosion-proof tank 2.1.Referring to accompanying drawing 2, wherein, the panchromatic light (laying particular stress on ultraviolet light) that sends by deuterium lamp L, line focus mirror M1 is divided into monochromatic light by the light after the absorption of sample through grating G to cuvette C and incident seam S1, with the monochromatic light of required wavelength by centre joint S2, be mapped to grating G2 through reflective mirror M2 again, beam split once more, the monochromatic light that obtains required utmost point low stray light arrives photoelectric commutator 3.4 through going out to stitch S3, becomes electric signal.Be provided with analytical wavelengths and regulate sine mechanism 4.2 and wavelength indication mechanism 4.3 below the darkroom of double grating beam splitting system, when length scanning, two grating G1 and G2 and wavelength indication mechanism 4.3 will rotate synchronously, can be used for carrying out the long calibration of scanning analysis and filter.The monochromatic light of the above-mentioned selected wavelength that obtains through the second grating G2 beam split has low-down parasitic light (about 10
-9～10
-10), thereby amplify the input signal of raising signal to noise ratio (S/N ratio) for signal.
The mobile heated type cuvette device 1.4 that is adopted in (1) part sample introduction described in the utility model and the analyzer part, it is a kind of cuvette of not usefulness, its concrete structure can be referring to Fig. 3.Wherein, be used for the upper and lower limit (being generally in 10 ℃ of scopes) of A.T.C by temperature relay 1 with the onesize heat shield 2 in temperature relay bottom surface.Heat by two Electric soldering iron cores 3.
Referring to Fig. 3, cuvette pedestal 4 is used for fixing cuvette sheet 20 and reference light damping plate 21 etc. and into and out of joint (6,7) of sample etc.Pedestal fixed mount 5 can be regulated the height of cuvette pedestal 4 in the 2-3mm scope, with optical system for alignment.Adopt the sealing of bite type pressure ring into and out of sample joint 6,7, use true footpath to connect closely, guarantee the sample introduction requirement of online spectroscope as the metal tube of Φ 3.
Sample flows between the cuvette sheet 20 by the fabrication hole of 4 li of cuvette pedestals, described cuvette sheet is made up of the quartz glass plate of two Φ 20, has light path sheet 19 between two, it is to make with polytetrafluoroethylmaterial material, can make sample from light path sheet 19 intermediate flow mistakes, the thickness of light path sheet 19 is between 0.5～1.0mm.Light path is vertically analyzed by the cuvette sheet.
Pull bar 9 is used for manually spurring moving of cuvette pedestal 4, and brace 8 is used for adjusting because of the caused parallel mobile interference of machine work tolerance.Guide rod 10 is two guide poles.Branch hole, three location is arranged on the cuvette locating rack 13, by pulley 14, location channel bar 15, rivet 16 (also having a torsion spring) is positioned on the stand 17 of location.By the pulling pull bar, carry out the variation of working position, various supports 11,12 and 23 are respectively applied for immobilising device.
Mobile heated type cuvette device of the present utility model has three positions when working, that is:
(a) analysis position.That is, make light path pass through to wait between the cuvette device sample of analyzing.
(b) zero check is put.That is, make the light path retaining between cuvette and reference light damping plate, the zero point that is used for proofreading light path part and circuit part.
(c) absorbance calibration position promptly, passes through in the middle of the reference light damping plate light path, is used for demarcating the accuracy of spectroscope institute cls analysis value.
Above-mentioned three positions are realized by pulling pull bar 9 by the operator.
The advantage of heated type floating cuvette described in the utility model is:
Temperature relay that can be by setting control temperature and the electric iron stamen of heating carry out temperature automatically controlled, And do not need hot water or radiator valve. This temperature control is applicable to that the use of online measurement spectroscope will Ask, temperature-controlled precision is limited by the precision of temperature relay. Secondly, can connect by turnover sample joint Connect the metal pipe line into and out of sample, satisfy the reliability requirement of on-line measurement spectroscope. In addition, establish Be set up and state three operating positions, be convenient to operation and the debugging of on-line measurement spectroscope. At last, have even The fine tuning structure of contact pin equidimension, to satisfy since requirement of explosion proof because pull bar operation shape, size Adjustment is interfered in tolerance and the operation that produces with the processing alignment error of cuvette device, thereby convenient The use of whole spectroscope, install and adjust.
Another characteristics of the present utility model are that whole analyzer is to adopt the flame-proof type explosion-proof form, It refers to that with opticator the heated type cuvette part that flows and electricity partly are installed in one In the anti-explosion box body, shown in the dotted portion in the accompanying drawing 1, it structurally is with opticator (comprising beam splitting system and light-source system) and cuvette device all fixed in position on same base plate, then The end, be fixed on the bottom surface of explosion-proof tank again. The electricity part is settled in all the other gaps in case.
Adopt the advantage of explosion-proof tank of the present utility model to be, owing in a casing electricity part is set, with the interference that reduces weak electric signal, for the high s/n ratio of circuit has been created condition.Secondly, the explosion-proof type design can reduce the technical difficulty to opticator and electricity partial design, the insecurity of having avoided on-line measurement to cause, and meet China about the essential requirement of explosion of explosive atmosphere application electrical system, at last, each Account Dept's diversity is put in an explosion-proof casing, and the volume of whole online check and analysis system is reduced, and cost descends.
The uv-spectrophotometric instrument of the on-line testing lube base oil ultraviolet light absorption coefficient that the utility model proposed can be applied in the online side amount of industry spot, solved hand sampling in the past, the problems that the chamber of testing, chamber is measured are surveyed means for the oil refining robotization provides a kind of mirror.Secondly, spectrometer is applied to industrial explosive atmosphere, and has solved the sample introduction difficulty, utilize the heating of flowing, need not dilute and the chemical treatment sample.In addition, the precision of analysis of the utility model spectroscope, repeatability and stability all can reach the requirement that surpasses the off-line manual analysis with part.
Claims (1)
1. uv-spectrophotometric instrument that on-line measurement is used, it comprises: sample introduction and analyzer part, electricity part, opticator is characterized in that, also comprises the explosion-proof tank part, described explosion-proof tank is provided with opticator in it, the heated type cuvette part that flows and electricity part, wherein with opticator and cuvette device fixed in position on same base plate, then base plate is fixed on the bottom surface of explosion-proof tank, its complementary space is settled the electricity part in the case, simultaneously, also feeds chilled water in the case; Described opticator comprises, the double grating beam splitting system, wherein panchromatic light (L) the line focus mirror (M1) that is sent by deuterium lamp stitches (S1) to cuvette (C) and incident, be divided into monochromatic light by the light after the absorption of sample through grating (G1), the monochromatic light of required wavelength is passed through the centre joint (S2), be mapped to grating (G2) through reflective mirror (M2) again, beam split obtains low spuious monochromatic light once more, through going out seam (S3) to photoelectric commutator; The output electric signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95216453 CN2250518Y (en) | 1995-07-21 | 1995-07-21 | Ultraviolet spectrophotometer for on-line measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95216453 CN2250518Y (en) | 1995-07-21 | 1995-07-21 | Ultraviolet spectrophotometer for on-line measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2250518Y true CN2250518Y (en) | 1997-03-26 |
Family
ID=33865541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95216453 Expired - Fee Related CN2250518Y (en) | 1995-07-21 | 1995-07-21 | Ultraviolet spectrophotometer for on-line measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2250518Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949930A (en) * | 2014-03-28 | 2015-09-30 | 希森美康株式会社 | Sample analyzer and sample analysis method |
| CN106680474A (en) * | 2017-02-04 | 2017-05-17 | 上海为然环保科技有限公司 | Instrument capable of quickly detecting escherichia coli on household tableware |
-
1995
- 1995-07-21 CN CN 95216453 patent/CN2250518Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104949930A (en) * | 2014-03-28 | 2015-09-30 | 希森美康株式会社 | Sample analyzer and sample analysis method |
| CN104949930B (en) * | 2014-03-28 | 2020-06-19 | 希森美康株式会社 | Sample analyzer and sample analyzing method |
| CN106680474A (en) * | 2017-02-04 | 2017-05-17 | 上海为然环保科技有限公司 | Instrument capable of quickly detecting escherichia coli on household tableware |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |