CN201289460Y - Color comparison device with variable optical distance - Google Patents

Abstract

The utility model discloses a color comparison device with variable light length, and particularly relates to a color comparison device used in flow chemical analysis. The color comparison device consists of an optical interference filter, a fiber access sleeve, an incident light diaphragm, a flow cell, a photodiode, a measuring circuit board, a detection box, a cover plate, a base, a moving bracket, a track bracket, a track, a light shading cover plate, a track locking block and a positioning sheet. When the color comparison device is in use, the light from a light source is transmitted to the optical interference filter, the incident light diaphragm, a detection light channel of the flow cell, an optical window and the optical photodiode through an optical fiber, and then transmitted to a computer through the measuring circuit board for processing, and finally, the detection data is acquired. The utility model has the advantages of displacement of flow cells of different light lengths, high sensitivity, good anti-vibration performance, small volume and operation in moving conditions.

Description

A kind of colorimetric device of variable light path

Technical field

The utility model relates to a kind of colorimetric device of variable light path, in particular for the colorimetric device in the chemical analysis that flows.

Background technology

Adopting spectrophotometric method in the chemical analysis that flows, is to utilize the detected solution that flows can absorb a certain monochromatic characteristic to carry out method for measuring, is a kind of rapid chemical analytical approach that makes things convenient for.Existing colorimetric device as described in the CN201083685 patent, mainly is made up of light source, monochromator, flow cell, photoelectric commutator and support etc.The colorimetric device that this device and grating are made beam splitter compares that to have shock resistance good, can adapt to the advantage of under roving condition, using, but weak point is the light path of flow cell fixes, sensitivity based on its assay determination of analyser of spectrophotometric method then is to be directly proportional with its path by light, therefore uses the flow cell of same light path impact analysis to measure sensitivity.

Summary of the invention

The purpose of this utility model provides a kind of colorimetric device of variable light path, and it has the adjustable advantage of spacing between monochromator and the flow cell, to improve the assay determination sensitivity of device.

For achieving the above object, the utility model comprises optical interference filter, optical fiber inserts cover, the incident diaphragm, flow cell, photodiode, the metering circuit plate, detect box, cover plate, support, flow cell is provided with and detects optical channel and flow of solution inlet and flow export, detect in the box photodiode is housed, the metering circuit plate, and be fixed on an end of support, photodiode connects the metering circuit plate, cover plate is detecting on the end face of box by screw retention, in optical fiber access cover, be provided with the optical fiber access port, and optical interference filter is housed, it is characterized in that: also comprise traversing carriage, track support, track, the shading cover plate, the lock on track piece, track support is fixed on the other end of support, the lock on track piece is installed in the groove on traversing carriage top, the track two ends are separately fixed at track support and detect the both sides of box, traversing carriage and lock on track piece kink are in the middle-end of track, between traversing carriage and detection box, flow cell and spacer are housed respectively, spacer is separately fixed at traversing carriage by screw and detects on the box, the shading cover plate is positioned at traversing carriage and detects the recess on box top, and by screw connection lock on track piece, side at the close track support of traversing carriage is equipped with optical fiber access cover and optical interference filter, incident diaphragm and optical window are housed at the traversing carriage of the detection optical channel both sides of flow cell with detecting in the box respectively, optical fiber inserts the optical fiber access port of cover, optical interference filter, the incident diaphragm, detect optical channel, the center of optical window photodiode is at same axial line.

The utility model then can be laid the flow cell of different in width owing to adopt the structure of above-mentioned traversing carriage track-movable, and historical facts or anecdotes has showed can change the flow cell of different light paths as required, thereby has improved detection sensitivity.In addition, the utility model also has the advantage that the compact conformation volume is little, replacing different wave length optical interference filter is more convenient and can use under roving condition.

Description of drawings

Fig. 1, be structure cut-open view of the present utility model;

Fig. 2, be schematic perspective view of the present utility model;

Fig. 3, be the utility model middle orbit clamping block structural representation.

Embodiment:

By shown in Figure 1, the utility model is made up of optical interference filter 19, optical fiber access cover 5, incident diaphragm 26, flow cell 20, photodiode 18, metering circuit plate 17, detection box 16, cover plate 14, support 7, traversing carriage 6, track support 4, track 3, shading cover plate 23, lock on track piece 2, spacer 10,12.Flow cell 20 is provided with and detects optical channel 24 and flow of solution inlet 22 and flow export 21.Detect in the box 16 photodiode 18, metering circuit plate 17 are housed, and be fixed on an end of support 7, photodiode 18 connects metering circuit plate 17, and cover plate 14 is fixed on the end face that detects box 16 by screw 11.In optical fiber access cover 5, be provided with the optical fiber access port, and optical interference filter 19 is housed.Track support 4 is fixed on the other end of support 7.Lock on track piece 2 is installed in the groove on traversing carriage 6 tops.Between traversing carriage 6 and detection box 16 flow cell 20 and spacer 10,12 are housed respectively, spacer 10,12 is separately fixed at traversing carriage 6 by screw 8,9,13,15 and detects on the box 16.Shading cover plate 23 is positioned at traversing carriage 6 and detects the recess on box 16 tops, and connects lock on track piece 2 by screw 1, and traversing carriage 6 can be locked or unclamp to rotating screw 1.Side at traversing carriage 6 close track supports 4 is equipped with optical fiber access cover 5 and optical interference filter 19.Incident diaphragm 26 and optical window 25 are housed at the traversing carriage 6 of detection optical channel 24 both sides of flow cell 20 with detecting in the box 16 respectively.The optical fiber access port of optical fiber access cover 5, optical interference filter 19, incident diaphragm 26, the center of optical channel 24, optical window 25, photodiode 18 of detecting are at same axial line.

When changing the flow cell 20 of different light paths, for guaranteeing to detect optical channel 24 and incident diaphragm 26, optical window 25 in being connected of same axial line and shading cover plate 23 and lock on track piece 2, the screw hole on spacer 10,12 and the shading cover plate 23 is a mounting hole.

By shown in Figure 2, detect the end that box 16 is fixed on support 7, track support 4 is fixed on the other end of support 7.Lock on track piece 2 is installed in the groove on traversing carriage 6 tops.Track 3 two ends are separately fixed at track support 4 and detect the both sides of box 16, and traversing carriage 6 and lock on track piece 2 kinks are in the middle-end of track 3.Shading cover plate 23 is positioned at traversing carriage 6 and detects the recess on box 16 tops, and connects lock on track piece 2 by screw 1, and rotating screw 1 can make lock on track piece 2 move up and down, with locking or unclamp traversing carriage 6.The flow of solution inlet 22 of flow cell 20 and flow export 21 pass shading cover plate 23 and extend upward.

By shown in Figure 3, symmetrical circular hole is kink (referring to Fig. 2) in orbit among the figure, and middle screw is to admit screw.

During use, optical fiber is installed in the optical fiber access port that optical fiber inserts cover 5, and the light that sends from light source produces monochromatic light by fiber optic conduction to optical interference filter 19, forms small light spots through incident diaphragm 26 again, i.e. monochromatic light pointolite, spot diameter 1.0mm.This monochromatic light passes through the detection optical channel 24 interior solution of flow cell 20 after optical window 25 arrives photodiodes 18, to be converted into electric signal by the monochromatic light of flow cell 20 by metering circuit plate 17 again, be transferred to computing machine and handle, can obtain to detect data.Change the flow cell 20 of different light paths, can improve the sensitivity of this Device Testing, change the optical interference filter 19 of different wave length, can make the detection of this device realization multi-wavelength's light signal.

Claims (2)

1, a kind of colorimetric device of variable light path, it comprises optical interference filter (19), optical fiber inserts cover (5), incident diaphragm (26), flow cell (20), photodiode (18), metering circuit plate (17), detect box (16), cover plate (14), support (7), flow cell (20) is provided with and detects optical channel (24) and flow of solution inlet (22) and flow export (21), detect in the box (16) photodiode (18) is housed, metering circuit plate (17), and be fixed on an end of support (7), photodiode (18) connects metering circuit plate (17), cover plate (14) is fixed on the end face that detects box (16) by screw (11), in optical fiber access cover (5), be provided with the optical fiber access port, and optical interference filter (19) is housed, it is characterized in that: also comprise traversing carriage (6), track support (4), track (3), shading cover plate (23), lock on track piece (2), track support (4) is fixed on the other end of support (7), lock on track piece (2) is installed in the groove on traversing carriage (6) top, track (3) two ends are separately fixed at track support (4) and detect the both sides of box (16), traversing carriage (6) and lock on track piece (2) kink are in the middle-end of track (3), between traversing carriage (6) and detection box (16), flow cell (20) and spacer (10) are housed respectively, (12), spacer (10), (12) by screw (8), (9), (13), (15) be separately fixed on traversing carriage (6) and the detection box (16), shading cover plate (23) is positioned at traversing carriage (6) and detects the recess on box (16) top, and by screw (1) connection lock on track piece (2), side at the close track support (4) of traversing carriage (6) is equipped with optical fiber access cover (5) and optical interference filter (19), incident diaphragm (26) and optical window (25) are housed at the traversing carriage (6) of detection optical channel (24) both sides of flow cell (20) with detecting in the box (16) respectively, optical fiber inserts the optical fiber access port that overlaps (5), optical interference filter (19), incident diaphragm (26), detect optical channel (24), optical window (25), the center of photodiode (18) is at same axial line.

2, according to the colorimetric device of the described a kind of variable light path of claim 1, it is characterized in that: the screw hole on spacer (10), (12) and the shading cover plate (23) is a mounting hole.

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