CN102288544B - Turbidity flowing cell - Google Patents
Turbidity flowing cell Download PDFInfo
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- CN102288544B CN102288544B CN 201010202560 CN201010202560A CN102288544B CN 102288544 B CN102288544 B CN 102288544B CN 201010202560 CN201010202560 CN 201010202560 CN 201010202560 A CN201010202560 A CN 201010202560A CN 102288544 B CN102288544 B CN 102288544B
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Abstract
The invention provides a turbidity flowing cell. Trough holes on the side wall of the main body of the flowing cell form two light source transmission holes through which light can penetrate, light emitted by a light-emitting device is directly transmitted into the inner cavity of the flowing cell by virtue of one light source transmission hole, and the light in the inner cavity of the flowing cell is received by a receiving device by virtue of the other light source transmission hole. The invention also provides another turbidity flowing cell which also comprises a transmitting/receiving device besides the main body the flowing cell, wherein one part of the transmitting/receiving device is embedded into the side wall of the main body of the flowing cell with certain thickness to form an integrated structure with the main body of the flowing cell. The flowing cell and a light source structure form a unified whole, thus linear distance between sample liquid in the flowing cell and a light source is greatly shortened and measuring accuracy is improved.
Description
Technical field
The present invention relates to the flow cell technology, particularly relate to a kind of for the turbidity flow-through cell on water quality on-line monitoring instrument.
Background technology
Along with the raising of economic development and people's living standard, environmental pollution and water pollution problems are more and more serious.For the pollution level of analyzing water quality will detect various parameters in water, as parameters such as COD (or hydrocarbon, chlorophyll A, rhodamine), ammonia nitrogen, colourity, turbidity, dissolved oxygen DO, conductivity, temperature and pH.the water quality on-line monitoring instrument that uses in the market adopts flow cell and testing liquid input pipe more, surveyed and be arranged in the water quality on-line monitoring instrument housing after liquid output pipe is connected, light source emitter and receiving device respectively are arranged on the flow cell both sides and are fixed in the water quality on-line monitoring instrument housing, and flow cell used adopts the glass structure of tubulose or rectangular shape more, adopt the flow cell of this structure to have sealing poor, and because all being arranged on the flow cell outside, light source emitter and receiving device cause apparatus measures not accurate enough, produce the problems such as bubble in flow cell.
Summary of the invention
The present invention provides a kind of turbidity flow-through cell in order to address the above problem, and this flow cell and light-source structure form Unified Global, has greatly shortened the air line distance of the interior sample liquid of flow cell to light source, has improved the accuracy of measuring.
Technical scheme of the present invention is as follows:
A kind of turbidity flow-through cell, comprise the sample liquid feed tube of flow cell main body, input testing liquid, the waste liquid vent pipe that liquid has been surveyed in output, described sample liquid feed tube is connected with the waste liquid vent pipe with described flow cell main body and is connected, it is characterized in that: boring a hole on described flow cell main body wall forms two light source beam orifices that can pass through light, and the light that is respectively by the emitter emission enters flow cell inner chamber, receiving trap by the light in the described circulation cell cavity of another one light source beam orifice reception by one of them light source beam orifice direct projection.
Described two light source beam orifices are separately positioned on the horizontal section of described flow cell main body each other on the position at right angle.
A kind of turbidity flow-through cell, comprise the sample liquid feed tube of flow cell main body, input testing liquid, the waste liquid vent pipe that liquid has been surveyed in output, described sample liquid feed tube is connected with the waste liquid vent pipe with described flow cell main body and is connected, it is characterized in that: also comprise transmission/reception, the part of described transmission/reception is embedded into to have on certain thickness flow cell main body wall with the flow cell main body and forms integrative-structure.
Described transmission/reception is divided into emitter and receiving trap, is separately positioned on flow cell main body horizontal section each other on the position at right angle.
Perforation forms two light source beam orifices that can pass through light on described flow cell main body wall, described light source beam orifice outer end arranges transmission/reception, the part of described transmission/reception is embedded into to have on certain thickness flow cell main body wall with the flow cell main body and forms integrative-structure, described two light source beam orifices are arranged on the horizontal section of flow cell main body each other on the position at right angle, a light source beam orifice outer end arranges emitter therein, and another light source beam orifice outer end arranges receiving trap.
Described transmission/reception comprises the housing that radially coordinates with the flow cell main body, described housing be hollow, the centrosymmetric structure take central axis as axle, light source mounting groove, the light source transmission through hole that sets gradually from the flow cell body distal end to near-end is set in it; Described housing is the hollow ring cylinder towards an end of flow cell main body side, the correspondence position correspondence that described flow cell main body is installed described housing is provided with annular embeded slot with chimeric described hollow ring cylinder, the inboard of described hollow ring cylinder arranges internal thread, the corresponding external thread that matches with described internal thread that arranges on annular embeded slot internal face.
Described light source beam orifice outer end namely also arranges the light path fit structure that coordinates with each parts in described housing, ladder planar optics, drying box, planar optics that described light path fit structure comprises the eyeglass groove and places successively from the inside to surface at the correspondence position of the described housing of described flow cell main body installation in the eyeglass groove; The diameter of described eyeglass groove is less than the diameter of annular embeded slot inwall; The external diameter of described ladder planar optics and described eyeglass groove internal diameter match, described ladder planar optics forms ladder planar optics boss in the face of light source beam orifice one side centre arranges boss, and the external diameter of described ladder planar optics boss probes in the light source beam orifice with the merging of light source beam orifice internal diameter kissing; Described drying box is made of inside and outside concentric cell wall, communicates with described light source beam orifice in internal groove side wall, and inside and outside cell wall is forming by the hollow ring sealing drying agent groove that can put drying agent near flow cell main body one end; Described planar optics external diameter and eyeglass groove internal diameter match; The junction of the part of the formation transmission/reception light source beam orifice of the hollow ring cylinder of described housing and described housing is a hollow ring plane, this plane described housing with fit tightly described planar optics after described flow cell main body screw is connected; In described eyeglass groove, the boss outer race of ladder planar optics has ladder planar optics O-ring seal, its diameter arranges less than ladder planar optics boss external diameter the ladder planar optics seal groove that can place ladder planar optics O-ring seal between described light source beam orifice and eyeglass groove; The cell wall outer end of described eyeglass groove stretches out and forms planar optics cone seal groove, in described planar optics cone seal groove, the planar optics O-ring seal is set, and its diameter is less than the planar optics external diameter; Described transmission/reception housing away from arrange on the outer face of an end of flow cell main body side make that transmission/reception and external environment completely cut off the transmitting/receiving case lid.
described flow cell main body comprises opening up having that certain accommodation space and this space consist of the tubbiness flow cell cavity of flow cell main body inner chamber and the flow cell lid of this opening of sealing of arranging at described opening part, the top of its sidewall is provided with inlet, described sample liquid feed tube is communicated with this inlet, described flow cell lid comprises and the airtight bound fraction that is connected in flow cell cavity upper end and the funtion part that stretches into flow cell main body inner chamber, described bound fraction and funtion part are structure as a whole, described funtion part has the inner concave arc surface over against described inlet, described inner concave arc surface and its flow cell body sidewall inwall of facing form the feed liquor water channel, described feed liquor water channel is communicated with the main channel of flow cell main body, described flow cell bottom is provided with the fluid water channel that is communicated with the waste liquid vent pipe.
described flow cell lid is the three section hollow cylinder lids that consist of of its periphery by different-diameter, its enlarged diameter section and interlude are above-mentioned bound fraction, described reduced diameter section is described funtion part, described enlarged diameter section is the round platform that its external diameter and flow cell cavity external diameter are complementary, several sunk screws holes is set on enlarged diameter section, interlude is the flow cell lid sealing ladder step that its external diameter and flow cell cavity internal diameter are complementary, described flow cell lid sealing ladder step outer ring sleeve has O type rubber ring, its diameter is less than the diameter of flow cell lid sealing ladder step, the reduced diameter section periphery is inner concave arc surface, when facing described inlet, described inner concave arc surface forms the feed liquor water channel, the hollow part of flow cell lid arranges for vertically connecting along cylindrical cover body axial line the fluid water channel that forms, described fluid water channel is communicated with described waste liquid vent pipe, the lid bottom surface of described flow cell lid is namely arc-shaped concave in the face of the face of flow cell inner chamber.
Described turbidity flow-through cell also comprises road circulation pipe and cleaning efferent duct in sample liquid, in described sample liquid the road circulation pipe for respectively from the outside connecting pipe that is communicated with the fluid water channel of fluid water channel that flow cell covers and flow cell cavity bottom of flow cell, in described sample liquid the road circulation pipe respectively with the fluid water channel that flow cell covers be connected with the flow cell cavity bottom fluid water channel when being communicated with by threeway respectively with the waste liquid vent pipe be connected efferent duct and be connected; Arrange on described flow cell cavity lateral wall flow cell is arranged on flow cell fixed support on water turbidity on-line monitoring instrument.
Technique effect of the present invention is:
The invention provides a kind of turbidity flow-through cell, on on the bucket wall of the side of flow cell main body perforation form two can be by the light source beam orifices of light, be respectively to enter flow cell inner chamber, receiving trap by the light of emitter emission by one of them light source beam orifice direct projection and receive light in described circulation cell cavity by another one light source beam orifice.The flow cell of this structure can adopt the material of lighttight energy explained hereafter, as the black polyformaldehyde resin, adopts this material can produce the flow cell of moulding, the problem that the sealing of avoiding the glass structure flow cell to have is poor on production line.
The present invention also provides a kind of turbidity flow-through cell, comprise the transmission/reception that forms Unified Global with the flow cell main body, but can receive or utilizing emitted light when this transmitting/receiving housing built-in light source circuit and on-line monitoring, the turbidity flow-through cell of this embedded transmission/reception can shorten sample liquid in flow cell and improve accuracy of measurement to the air line distance of light source.
two light source beam orifices are separately positioned on the flow cell sidewall, on the horizontal section of flow cell main body each other on the position at right angle, the i.e. transmission/reception that arranges of two light source beam orifice outer ends right angle each other on the horizontal section of flow cell main body, scattering is spuious penetrates because light all around all can occur when beating granule in water, reduce measuring accuracy, and granule is more effective for the scattering of long wavelength's light for the scattering ratio of short wavelength light, when turbidity value during lower than 40NTU, use 90 degree light scattering detectors to measure turbidity and can effectively avoid the interference that brings due to colourity or extinction material, and with minimum stray light, increased the accuracy of measuring.
The main body of this flow cell adopt installed surface on the barreled cavity to the position of sample liquid feed tube be arc-shaped concave the flow cell lid, be provided with two of up and down fluid water channel and with sample liquid that these two fluid water channels are connected in road circulation pipe, built-in light source circuit and flow cell formation Unified Global transmitting/receiving housing.The turbidity flow-through cell of this structure, when sample liquid is measured, after liquid enters the turbidity flow-through cell inner chamber from sample liquid feed tube, beat on the feed liquor water channel with arc-shaped concave, the design of the circular arc type of water channel liquid is spiraled by circular arc and under, sample liquid current are played the effect of good decompression impact-reducing, effectively avoid sample liquid to produce aeration when feed liquor and measure; The full flow cell inner chamber of liquid stream loops back cavity from bottom to top by road circulation pipe in sample liquid; At this moment the transmission/reception that is contained in the transmitting/receiving housing on flow cell body barrel wall is measured sample liquid, this embedded light source installation form moves to the transmitting/receiving enclosure interior with circuit of light sources, form Unified Global with flow cell, greatly shorten the air line distance of the interior sample liquid of flow cell to light source, improved the accuracy of measuring; Measure the complete fluid water channel two-way water outlet simultaneously that can cover by fluid water channel and the flow cell of cone tank bottom, with cover threeway left end manifold and close by the waste liquid vent pipe and discharge cavity, flow cell covers circular arc type design immediate decompression impact-reducing when discharge opeing of fluid water channel, can relax the more effective Bubble formation of avoiding of current.Whole turbidity flow-through cell adopts enclosed construction, water sample to be measured is by the totally-enclosed interior circulation waterway of turbidity flow-through cell, disposablely realize feed liquor, detect to analyze, discharge opeing, overall process is all completed in turbidity flow-through cell, need not the assistance by the peace external member, can realize bubble and discharge opeing work in filtering liquid to be measured.
The cleaning efferent duct of installing on flow cell can be when clean and maintenance equipment, and cleansing solution can directly be discharged by the cleaning efferent duct of flow cell bottom three-way pipe fitting left end connection, and is easy to operate, will the flow cell one-piece construction not pull down in cabinet.
adopt multi-sealed protection between flow cell main body and transmitting/receiving housing, the ladder planar optics is set, planar optics, be arranged on the desiccant box of the built-in drying agent between ladder planar optics and planar optics, be enclosed within flow cell lid sealing ladder step outer ring O type rubber ring, ladder planar optics O-ring seal, the planar optics O-ring seal, these devices can not flow in the transmitting/receiving housing by the interior liquid of seal protection flow cell main body inner chamber, keep the more dry stable circuit of light sources environment in the transmitting/receiving housing, sealing structure is good, the synchronous drying agent that uses is strengthened drying effect, structural maintenance is easy for installation, external form is succinctly attractive in appearance, functional strong, can satisfy to greatest extent the desired structure requirement that sample liquid detects.
Description of drawings
Fig. 1 is turbidity flow-through cell front view of the present invention;
Fig. 2 is the turbidity flow-through cell longitudinal sectional view of Fig. 1;
Fig. 3 is the partial enlarged drawing of the I of Fig. 2;
Fig. 4 is the vertical view of Fig. 1;
Fig. 5 is turbidity flow-through cell lid vertical view of the present invention;
Fig. 6 is the side sectional view of Fig. 5;
Fig. 7 is the flow cell main body base cut-open view when the transmitting/receiving housing is not installed;
Fig. 8 is the partial enlarged drawing of the I of Fig. 7;
Fig. 9 is transmitting/receiving housing cut-open view;
Figure 10 is ladder planar optics side view;
Figure 11 is the vertical view of Figure 10;
Figure 12 is the side view of drying box;
Figure 13 is the vertical view of Figure 12.
Reference numeral lists as follows:
1-flow cell lid, 2-flow cell cavity, the 3-transmission/reception, the 31-housing, 4-transmitting/receiving case lid, road circulation pipe in 5-sample liquid, 6-cleans efferent duct, 7-sample liquid feed tube, 8-waste liquid vent pipe, 9-flow cell fixed support, the 10-cone tank, 11-flow cell lid sealing ladder step, 12-feed liquor water channel, 13-fluid water channel, 14-light source beam orifice, 15-ladder planar optics, 16-ladder planar optics seal groove, 17-ladder planar optics O-ring seal, 18-eyeglass groove, the 19-drying box, 20-drying agent groove, the 21-planar optics, 22-planar optics cone seal groove, 23-planar optics O-ring seal, 24-light source transmission through hole, 25-light source mounting groove, the 26-external thread, the 27-internal thread, 28-ladder planar optics boss, the 29-gap.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described further.Fig. 1 is turbidity flow-through cell front view of the present invention, Fig. 2 is the turbidity flow-through cell longitudinal sectional view of Fig. 1, Fig. 3 is the partial enlarged drawing of the I of Fig. 2, Fig. 4 is the vertical view of Fig. 1, Fig. 5 is turbidity flow-through cell lid vertical view of the present invention, Fig. 6 is the side sectional view of Fig. 5, Fig. 7 is the flow cell main body base cut-open view when the transmitting/receiving housing is not installed, Fig. 8 is the partial enlarged drawing of the I of Fig. 7, Fig. 9 is transmitting/receiving housing cut-open view, Figure 10 is ladder planar optics side view, Figure 11 is the vertical view of Figure 10, Figure 12 is the side view of drying box, Figure 13 is the vertical view of Figure 12.
The invention provides a kind of turbidity flow-through cell, as shown in Figure 1, comprise the sample liquid feed tube 7 of flow cell main body, input testing liquid, the waste liquid vent pipe 8 that liquid has been surveyed in output, sample liquid feed tube 7 is connected with the waste liquid vent pipe and is connected with the flow cell main body respectively, as shown in Figure 3, boring a hole on the flow cell main body wall forms two light source beam orifices 14 that can pass through light, and the light that is respectively by the emitter emission enters flow cell inner chamber, receiving trap by the light in the another one light source beam orifice 14 described circulation cell cavities of reception by one of them light source beam orifice 14 direct projection.
Preferably, two light source beam orifices 14 are separately positioned on the horizontal section of described flow cell main body each other on the position at right angle.
The present invention also provides a kind of turbidity flow-through cell, and as shown in Figure 1, this turbidity flow-through cell also comprises transmission/reception 3, and the part of transmission/reception 3 is embedded into to have on certain thickness flow cell main body wall with the flow cell main body and forms integrative-structure.
Preferably, transmission/reception 3 is divided into emitter and receiving trap, as shown in Figure 1, is separately positioned on flow cell main body horizontal section each other on the position at right angle.
Preferably, in above-mentioned light source beam orifice 14 outer ends, above-mentioned transmission/reception 3 is set, light source beam orifice 14 outer ends arrange emitter therein, and another light source beam orifice 14 outer ends arrange receiving trap.
As shown in Figure 2 and Figure 3, above-mentioned transmission/reception 3 comprises the housing 31 that radially coordinates with the flow cell main body, as shown in Figure 9, this housing 31 for hollow, the centrosymmetric structure take central axis as axle, light source mounting groove 25, the light source transmission through hole 24 that sets gradually from the flow cell body distal end to near-end is set in it; Housing 31 is the hollow ring cylinder towards an end of flow cell main body side, as Fig. 3, shown in Figure 7, the correspondence position correspondence of flow cell main body holder housing 31 is provided with annular embeded slot with chimeric hollow ring cylinder, the inboard of hollow ring cylinder arranges internal thread 27, the corresponding external thread 26 that matches with internal thread 27 that arranges on annular embeded slot internal face.
As Fig. 7, shown in Figure 8, the correspondence position that above-mentioned housing 31 is installed in the flow cell main body also arranges the light path fit structure that coordinates with each parts in housing 31, the light path fit structure comprises three annular housings by the flow cell main body inner wall sets gradually laterally, diameter increases successively, consist of successively light source beam orifice 14, ladder planar optics seal groove 16 and the eyeglass groove 18 of printing opacity, the diameter of eyeglass groove 18 is less than the diameter of above-mentioned annular embeded slot inwall.
As shown in Figure 3, place successively from the inside to surface ladder planar optics 15, drying box 19, planar optics 21 in eyeglass groove 18; The diameter of eyeglass groove 18 is less than the diameter of annular embeded slot inwall, and the external diameter of ladder planar optics 15 and eyeglass groove 18 internal diameters match.As Figure 10, shown in Figure 11, ladder planar optics 21 forms ladder planar optics boss 28 in the face of light source beam orifice 14 1 side centres arrange boss, and the external diameter of ladder planar optics boss 28 probes in light source beam orifice 14 with the 14 internal diameter kissings merging of light source beam orifice.As shown in Figure 12 and Figure 13, drying box 19 is made of inside and outside concentric cell wall, communicates with light source beam orifice 14 in internal groove side wall, and inside and outside cell wall is forming by the hollow ring sealing drying agent groove 20 that can put drying agent near flow cell main body one end.Planar optics 21 external diameters and eyeglass groove 18 internal diameters match.
As shown in Figure 9, the junction of the part in the formation transmission/reception light source transmission of the hollow ring cylinder of housing 31 and housing 31 logical 24 holes is a hollow ring plane, this plane housing 31 with fit tightly planar optics 21 after the flow cell main body screw is connected.
As shown in Figure 3, boss 28 outer race of the interior ladder planar optics 15 of eyeglass groove 18 have ladder planar optics O-ring seal 17, its diameter arranges less than ladder planar optics boss 28 external diameters the ladder planar optics seal groove 16 that can place ladder planar optics O-ring seal 17 between light source beam orifice 14 and eyeglass groove 18.The cell wall outer end of eyeglass groove 18 stretches out and forms planar optics cone seal groove 22, the interior planar optics O-ring seal 23 that arranges of planar optics cone seal groove 22, and its diameter is less than planar optics 21 external diameters; Transmission/reception 3 housings 31 away from arrange on the outer face of an end of flow cell main body side make transmission/reception 3 and external environment isolated transmitting/receiving case lid 4.
As shown in Figure 1 and Figure 2, preferably, the flow cell main body comprises opening up having that certain accommodation space and this space consist of the tubbiness flow cell cavity 2 of flow cell main body inner chamber and the flow cell lid 1 of this opening of sealing of arranging at this opening part, the top of its sidewall is provided with inlet, and sample liquid feed tube 7 is communicated with this inlet.
As Fig. 5, shown in Figure 6, flow cell lid 1 comprises and the airtight bound fraction that is connected in flow cell cavity 2 upper ends and the funtion part that stretches into flow cell main body inner chamber, bound fraction and funtion part are structure as a whole, funtion part has the inner concave arc surface over against described inlet, inner concave arc surface and its flow cell body sidewall inwall of facing form feed liquor water channel 12, feed liquor water channel 12 is communicated with the main channel of flow cell main body, and flow cell bottom is provided with the fluid water channel 13 that is communicated with waste liquid vent pipe 8.
as Fig. 5, shown in Figure 6, flow cell lid 1 is the three section hollow cylinder lids that consist of of its periphery by different-diameter, its enlarged diameter section and interlude are above-mentioned bound fraction, reduced diameter section is funtion part, enlarged diameter section is the round platform that its external diameter and flow cell cavity 2 external diameters are complementary, several sunk screws holes is set on enlarged diameter section, interlude is the flow cell lid sealing ladder step 11 that its external diameter and flow cell cavity 2 internal diameters are complementary, the reduced diameter section periphery is inner concave arc surface, when facing inlet, inner concave arc surface forms feed liquor water channel 12, the hollow part of flow cell lid 1 arranges for vertically connecting along cylindrical cover body axial line the fluid water channel 13 that forms, fluid water channel 13 is communicated with waste liquid vent pipe 8, the lid bottom surface of flow cell lid 1 is namely arc-shaped concave in the face of the face of flow cell inner chamber, flow cell lid sealing ladder step 11 outer ring sleeves have O type rubber ring, and its diameter is less than the diameter of flow cell lid sealing ladder step 11.
As shown in Figure 1, turbidity flow-through cell also comprises road circulation pipe 5 and cleaning efferent duct 6 in sample liquid, road circulation pipe 5 be respectively from the outside connecting pipe that is communicated with the fluid water channel 13 of fluid water channel 13 on flow cell lid 1 and flow cell cavity 2 bottoms of flow cell in sample liquid, in sample liquid road circulation pipe 5 respectively with flow cell lid 1 on fluid water channel 13 when being connected fluid water channel 13 connection of bottom with the flow cell cavity by threeway respectively with waste liquid vent pipe 8 be connected efferent duct 6 and be connected; Arrange on flow cell cavity 2 lateral walls flow cell is arranged on flow cell fixed support 9 on water turbidity on-line monitoring instrument.
It is below most preferred embodiment.
As Fig. 1, Fig. 2, shown in Figure 4, turbidity flow-through cell of the present invention form for be made, have certain thickness chamber wall by black polyformaldehyde resin (the black polyformaldehyde resin can be avoided other catoptrical interference, improve accuracy of detection) streamline on the barreled flow cell cavity 2 of flow cell inner chamber with sunk screw fixedly flow cell cover 1 and form.
as Fig. 5, shown in Figure 6, flow cell lid 1 is the three section hollow cylinder lids that consist of of its periphery by different-diameter, enlarged diameter section is the round platform that its external diameter and flow cell cavity 2 external diameters are complementary, several sunk screws holes is set on enlarged diameter section, interlude is the flow cell lid sealing ladder step 11 that its external diameter and flow cell cavity 2 internal diameters are complementary, the reduced diameter section periphery is inner concave arc surface, the hollow part of flow cell lid 1 arranges for vertically connecting along cylindrical cover body axial line the fluid water channel 13 that forms, the lid bottom surface of flow cell lid 1 is namely arc-shaped concave in the face of the face of flow cell inner chamber.As shown in Figure 1, the top of flow cell cavity 2 sidewalls is provided with inlet, this inlet is communicated with sample liquid feed tube 7, the inner concave arc surface of the periphery on above-mentioned flow cell lid 1 forms feed liquor water channel 12 in the face of inlet, as shown in Figure 2, the intracavity bottom of flow cell main body is cone tank 10, and when this cone tank 10 makes draining for alleviating hydraulic pressure, not residual remaining liquid improves drainage effect, and the cone tank bottom arranges fluid water channel 13.
As shown in Figure 1, flow cell fixed support 9 is set on the flow cell lateral wall, is connected by screw.Package unit has two three-way pipe fittings, and a straight pipe fitting, is connected with flow cell with the flow cell lid by taper thread respectively.An end of road circulation pipe 5 the upper end of flow cell lid 1 connects fluid water channel 13, waste liquid vent pipe 8 and the sample liquid of flow cell lid 1 with the three-way pipe fitting within, the lower end of flow cell cavity 2 with the three-way pipe fitting connect the cone tank bottom fluid water channel 13, clean the other end of road circulation pipe 5 in efferent duct 6 and sample liquid.A straight pipe fitting connects sample liquid feed tube 7.
On flow cell cavity 2, assembling flow cell lid was slightly less than the O type rubber ring of stepped diameters at 1 o'clock on turbidity flow-through cell sealing ladder step 11 outer ring sleeves, after flow cell lid 1 and flow cell cavity 2 assemble, O type rubber ring is that frame is on flow cell cavity 2, when sunk screw is locked flow cell lid 1 with flow cell cavity 2, O type rubber ring namely is compacted on flow cell cavity 2 surfaces, O type loop diameter is slightly less than the ladder step in addition, after assembling, O-ring seal is from the installation gap closing of two directions with 2 of turbidity flow-through cell lid and flow cell cavitys, the airtight effect of its good sealing.
As shown in Figure 1 and Figure 2, at flow cell cavity 2 sidewalls, transmission/reception 3 is set, one is partially submerged on circulation cell cavity wall and forms integrative-structure with flow cell, comprises housing 31 and inner parts thereof.As Fig. 7, shown in Figure 8, by three annular housings that flow cell cavity 2 inwalls set gradually laterally, diameter increases successively, consist of successively light source beam orifice 14, ladder planar optics seal groove 16, the eyeglass groove 18 of printing opacity on the flow cell sidewall.As shown in Figure 3, eyeglass groove 18 is placed ladder planar optics 15, drying box 19, planar optics 21 from the inside to surface successively, ladder planar optics 15 and planar optics 21 are quartz wafer, the external diameter of ladder planar optics 15 and eyeglass groove 18 internal diameters match, as Figure 10, shown in Figure 11, ladder planar optics 15 forms ladder planar optics boss 28 in the face of light source beam orifice one side centre arranges boss, and the external diameter of ladder planar optics boss 28 probes in light source beam orifice 14 with the 14 internal diameter kissings merging of light source beam orifice; As shown in Figure 12 and Figure 13, drying box 19 is made of inside and outside concentric cell wall, communicate with light source beam orifice 14 in internal groove side wall, inside and outside cell wall is forming by the hollow ring sealing drying agent groove 20 that can put drying agent near flow cell cavity 2 one ends, the end that internal groove side wall contacts with planar optics 21 arranges two gap 29, and this gap 29 can make the drying agent in drying box 19 keep the interior drying of transmission/reception 3; Planar optics 21 external diameters and eyeglass groove 18 internal diameters match.The periphery of above-mentioned eyeglass groove 18 is annular embeded slot, on the outer wall of eyeglass groove 18 is on annular embeded slot inwall, external thread 26 to be set.This flow cell also comprises the housing 31 that radially coordinates with the flow cell main body, as shown in Figure 9, the housing 31 of this transmission/reception 3 for hollow, the centrosymmetric structure take central axis as axle, the one end arranges internal thread 27, the housing 31 of transmission/reception 3 is connected with corresponding position external thread 26 on flow cell cavity 2 by this internal thread 27, arranges from the distal-to-proximal light source mounting groove 25 that sets gradually of flow cell cavity, light source transmission through hole 24 in it; Housing 31 inside of transmission/reception 3 are fixed on the circuit light source in light source mounting groove 25 by screw.The dual seal mode is adopted in sealing herein, one deck has sealed the primary seal effect, the O type rubber ring that is slightly less than the boss diameter by add the cover internal diameter on ladder planar optics boss 28 external diameters is that ladder planar optics O-ring seal 17 is realized, the rubber ring frame after assembling is on ladder planar optics seal groove 16 surfaces.Two layers have sealed the insurance sealing function, are that planar optics O-ring seal 23 is realized by add cover O type rubber ring on the planar optics external diameter, and after assembling, the rubber ring frame is in the tapered seal groove of planar optics 22 surfaces that are arranged on eyeglass groove 18 outer ends.Due to the thickness of ladder planar optics boss 28, planar optics 21 and the stacked backwardness of the O-ring seal degree of depth greater than eyeglass groove 18, the internal thread 27 of housing 31 that can be by transmission/reception 3 when screw-threaded coupling by coupling mechanism force with two-layer O-ring seal compacting, abundant applying turbidity flow-through cell respective surfaces, good sealing function is reliably played in blind fully.One deck sealing guaranteed sample liquid in flow cell appropriate be sealed in the turbidity flow-through cell inner chamber, two layers of sealing form secondary fuse between water route and circuit of light sources, during as one deck sealing wear or accidental water leakage, the safety at circuit light source place can be guaranteed by 2 sealings, in order to avoid the circuit light source is damaged because of immersion.Light source more successively by planar optics 21, drying box 19 light source open-works, ladder planar optics 15, finally enters the flow cell inner chamber by 14 direct projections of light source beam orifice by light source transmission through hole 24, and sample liquid is measured.For making transmitting/receiving housing 31 and external environment isolated, install transmitting/receiving case lid 4 additional, be connected by screw, make the effect that realizes that transmitting/receiving housing 31 inner sealings and external environment completely cut off.For building more dry stable circuit of light sources environment, the spy adds dry member turbidity drying box 19 in the middle of two-layer quartz glass eyeglass, and strengthens drying effect at the interior desiccant-filled particle of drying agent groove 20.
When sample liquid is measured, liquid enters the turbidity flow-through cell inner chamber from sample liquid feed tube 7, beat on feed liquor water channel 12, the design of the circular arc type of water channel liquid is spiraled by circular arc and under, sample liquid current are played the effect of good decompression impact-reducing, effectively avoid sample liquid to produce aeration when feed liquor and measure.The full flow cell inner chamber of liquid stream, the three-way pipe fitting outflow by the lower end loops back cavity from bottom to top by road circulation pipe 5 in threeway right-hand member sample liquid.Measure when complete, can be by closed circuit under flow cell, and through hole two-way water outlet simultaneously on top flow cell lid 1, with cover threeway left end waste liquid vent pipe 8 and converge the discharge cavity, on flow cell lid 1, circular arc type design immediate decompression impact-reducing when discharge opeing of fluid water channel 13, can relax the more effective Bubble formation of avoiding of current, flow cell inner chamber lower end is set to the tapered water channel of draining that cone tank 10 becomes the flow cell lower end, can effectively alleviate hydraulic pressure, make drainage effect better, not residual remaining liquid.During the equipment clean and maintenance, cleansing solution can namely clean efferent duct 6 by three-way pipe fitting left end connecting leg bottom flow cell and directly discharge, and is easy to operate, will the flow cell one-piece construction not pull down in cabinet.
Transmission/reception 3 is divided into emitter and receiving trap, be separately positioned on flow cell cavity horizontal section the position at right angle each other, because of granule more effective for the scattering of long wavelength's light for the scattering ratio of short wavelength light, when turbidity value during lower than 40NTU, use 90 degree light scattering detectors to measure turbidity and can effectively avoid the interference that brings due to colourity or extinction material, and with minimum stray light, so emitter and receiving trap are arranged on the accuracy that the position at right angle each other can increase measurement.Light emitting diode is set in emitter, photodiode is set in receiving trap.
Turbidity flow-through cell adopts enclosed construction, water sample to be measured is by the totally-enclosed interior circulation waterway of turbidity flow-through cell, disposablely realize feed liquor, detect to analyze, discharge opeing, overall process is all completed in turbidity flow-through cell, need not the assistance by the peace external member, can realize bubble and discharge opeing work in filtering liquid to be measured.And light source is arranged in transmitting/receiving housing 31, and embedded structure makes light source nearer apart from liquid to be measured, makes measurement data more accurate.Sealing structure is good, namely adds desiccant box in structure, synchronously uses drying agent to strengthen drying effect.This device characteristic is compactness simple for structure, can get rid of bubble in liquid to be measured in structure, and light source is more accurate apart from the less measurement of liquid distance to be measured, and good airproof performance, is easy to maintenance is installed, and the easy to clean blowdown is totally thorough.
The arcuate structure of inner each water channel of turbidity flow-through cell makes current milder, avoid Bubble formation, and the whole turbidity flow-through cell inside of circulating in completes, compact conformation, complete feed liquor, discharge opeing, cleaning under the totally enclosed state of turbidity flow-through cell, have good globality.And mechanism's sealing is good, and embedded light source installation form moves to the transmitting/receiving enclosure interior with circuit of light sources, forms Unified Global with flow cell, has greatly shortened the air line distance of the interior sample liquid of flow cell to light source, has improved the accuracy of measuring.Structural maintenance is easy for installation, and external form is succinctly attractive in appearance, and is functional strong, can satisfy to greatest extent the desired structure requirement that sample liquid detects.
The above is only the preferred embodiment of the present invention, and other modification and the improvement for making according to essence of the present invention all will fall into protection scope of the present invention.
Claims (4)
1. turbidity flow-through cell, comprise the flow cell main body, the sample liquid feed tube of input testing liquid, the waste liquid vent pipe of liquid has been surveyed in output, described sample liquid feed tube is connected with the waste liquid vent pipe with described flow cell main body and is connected, it is characterized in that: also comprise transmission/reception, described transmission/reception is divided into emitter and receiving trap, on described flow cell main body wall, perforation forms two light source beam orifices that can pass through light, light by the emitter emission enters the flow cell inner chamber by one of them light source beam orifice direct projection, receiving trap receives the interior light of described circulation cell cavity by another one light source beam orifice, described light source beam orifice outer end arranges transmission/reception, the part of described transmission/reception is embedded into to have on certain thickness flow cell main body wall with the flow cell main body and forms integrative-structure, described two light source beam orifices are arranged on the horizontal section of flow cell main body each other on the position at right angle, a light source beam orifice outer end arranges emitter therein, and another light source beam orifice outer end arranges receiving trap, described transmission/reception comprises the housing that radially coordinates with the flow cell main body, described housing be hollow, the centrosymmetric structure take central axis as axle, light source mounting groove, the light source transmission through hole that sets gradually from the flow cell body distal end to near-end is set in it, described housing is the hollow ring cylinder towards an end of flow cell main body side, the correspondence position correspondence that described flow cell main body is installed described housing is provided with annular embeded slot with chimeric described hollow ring cylinder, the inboard of described hollow ring cylinder arranges internal thread, the corresponding external thread that matches with described internal thread that arranges on annular embeded slot internal face, described light source beam orifice outer end namely also arranges the light path fit structure that coordinates with each parts in described housing, ladder planar optics, drying box, planar optics that described light path fit structure comprises the eyeglass groove and places successively from the inside to surface at the correspondence position of the described housing of described flow cell main body installation in the eyeglass groove, the diameter of described eyeglass groove is less than the diameter of annular embeded slot inwall, the external diameter of described ladder planar optics and described eyeglass groove internal diameter match, described ladder planar optics forms ladder planar optics boss in the face of light source beam orifice one side centre arranges boss, and the external diameter of described ladder planar optics boss probes in the light source beam orifice with the merging of light source beam orifice internal diameter kissing, described drying box is made of inside and outside concentric cell wall, communicates with described light source beam orifice in internal groove side wall, and inside and outside cell wall is forming by the hollow ring sealing drying agent groove that can put drying agent near flow cell main body one end, described planar optics external diameter and eyeglass groove internal diameter match, the junction of the part of the formation transmission/reception light source beam orifice of the hollow ring cylinder of described housing and described housing is a hollow ring plane, this plane described housing with fit tightly described planar optics after described flow cell main body screw is connected, in described eyeglass groove, the boss outer race of ladder planar optics has ladder planar optics O-ring seal, its diameter arranges less than ladder planar optics boss external diameter the ladder planar optics seal groove that can place ladder planar optics O-ring seal between described light source beam orifice and eyeglass groove, the cell wall outer end of described eyeglass groove stretches out and forms planar optics cone seal groove, in described planar optics cone seal groove, the planar optics O-ring seal is set, and its diameter is less than the planar optics external diameter, described transmission/reception housing is away from the transmitting/receiving case lid that transmission/reception and external environment are completely cut off is set on the outer face of an end of flow cell main body side.
2. turbidity flow-through cell according to claim 1, it is characterized in that: described flow cell main body comprises opening up having that certain accommodation space and this space consist of the tubbiness flow cell cavity of flow cell main body inner chamber and the flow cell lid of this opening of sealing of arranging at described opening part, the top of its sidewall is provided with inlet, described sample liquid feed tube is communicated with this inlet, described flow cell lid comprises and the airtight bound fraction that is connected in flow cell cavity upper end and the funtion part that stretches into flow cell main body inner chamber, described bound fraction and funtion part are structure as a whole, described funtion part has the inner concave arc surface over against described inlet, described inner concave arc surface and its flow cell body sidewall inwall of facing form the feed liquor water channel, described feed liquor water channel is communicated with the main channel of flow cell main body, described flow cell bottom is provided with the fluid water channel that is communicated with the waste liquid vent pipe.
3. turbidity flow-through cell according to claim 2, it is characterized in that: described flow cell lid is the three section hollow cylinder lids that consist of of its periphery by different-diameter, its enlarged diameter section and interlude are above-mentioned bound fraction, reduced diameter section is described funtion part, described enlarged diameter section is the round platform that its external diameter and flow cell cavity external diameter are complementary, several sunk screws holes is set on enlarged diameter section, interlude is the flow cell lid sealing ladder step that its external diameter and flow cell cavity internal diameter are complementary, described flow cell lid sealing ladder step outer ring sleeve has O type rubber ring, its diameter is less than the diameter of flow cell lid sealing ladder step, the reduced diameter section periphery is inner concave arc surface, when facing described inlet, described inner concave arc surface forms the feed liquor water channel, the hollow part of flow cell lid arranges for vertically connecting along cylindrical cover body axial line the fluid water channel that forms, described fluid water channel is communicated with described waste liquid vent pipe, the lid bottom surface of described flow cell lid is namely arc-shaped concave in the face of the face of flow cell inner chamber.
4. turbidity flow-through cell according to claim 3, it is characterized in that: described turbidity flow-through cell also comprises road circulation pipe and cleaning efferent duct in sample liquid, in described sample liquid the road circulation pipe for respectively from the outside connecting pipe that is communicated with the fluid water channel of fluid water channel that flow cell covers and flow cell cavity bottom of flow cell, in described sample liquid the road circulation pipe respectively with the fluid water channel that flow cell covers be connected with the flow cell cavity bottom fluid water channel when being communicated with by threeway respectively with the waste liquid vent pipe be connected efferent duct and be connected; Arrange on described flow cell cavity lateral wall flow cell is arranged on flow cell fixed support on water turbidity on-line monitoring instrument.
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| CN 201010202560 CN102288544B (en) | 2010-06-17 | 2010-06-17 | Turbidity flowing cell |
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| WO2014181527A1 (en) * | 2013-05-09 | 2014-11-13 | 国立大学法人徳島大学 | Raw material fluid density detector |
| AU2015317377A1 (en) * | 2014-09-19 | 2017-01-19 | Hach Company | Nephelometric turbidimeter with axial illumination and circumferential photodetector |
| CN107532995B (en) * | 2015-04-24 | 2021-02-05 | 株式会社岛津制作所 | Optical analysis device and method for manufacturing the same |
| JP7071987B2 (en) * | 2017-02-23 | 2022-05-19 | フォセオン テクノロジー， インコーポレイテッド | Integrated Illumination Detection Flow Cell for Liquid Chromatography |
| CN108107011B (en) * | 2017-12-30 | 2020-08-14 | 北方工业大学 | Intelligent sensor based on double-light-source water quality COD detection parameters |
| CN110132905B (en) * | 2019-05-29 | 2021-03-16 | 清华大学 | Dynamic measuring system |
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|---|---|---|---|---|
| CN2514351Y (en) * | 2001-12-20 | 2002-10-02 | 孙墨杰 | Batch-type on-line automatic washing turbidimeter |
| CN2556638Y (en) * | 2002-01-09 | 2003-06-18 | 吉林市光大电力设备有限责任公司 | Photoelectric detector for water quality turbidity measurer |
| CN201497700U (en) * | 2009-07-04 | 2010-06-02 | 白壮 | Water supply online turbidity sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2007093566A (en) * | 2005-09-28 | 2007-04-12 | Kurihara Kogyo:Kk | Turbidimeter |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2514351Y (en) * | 2001-12-20 | 2002-10-02 | 孙墨杰 | Batch-type on-line automatic washing turbidimeter |
| CN2556638Y (en) * | 2002-01-09 | 2003-06-18 | 吉林市光大电力设备有限责任公司 | Photoelectric detector for water quality turbidity measurer |
| CN201497700U (en) * | 2009-07-04 | 2010-06-02 | 白壮 | Water supply online turbidity sensor |
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| JP特开2007-93566A 2007.04.12 |
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