CN102288544A - Turbidity flowing cell - Google Patents
Turbidity flowing cell Download PDFInfo
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- CN102288544A CN102288544A CN2010102025607A CN201010202560A CN102288544A CN 102288544 A CN102288544 A CN 102288544A CN 2010102025607 A CN2010102025607 A CN 2010102025607A CN 201010202560 A CN201010202560 A CN 201010202560A CN 102288544 A CN102288544 A CN 102288544A
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- flow cell
- main body
- light source
- planar optics
- turbidity
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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 turbidity flow cell that is used on the 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 the water, as parameters such as COD (or hydrocarbon, chlorophyll A, rhodamine), ammonia nitrogen, colourity, turbidity, dissolved oxygen DO, conductivity, temperature and pH.Employed in the market water quality on-line monitoring instrument adopts flow cell and testing liquid input pipe more, surveyed and be installed in the water quality on-line monitoring instrument housing after liquid output pipe is connected, light emitted device 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 used flow cell adopts the glass structure of tubulose or rectangular shape more, and it is poor to adopt the flow cell of this structure to have sealing, and, light emitted device and receiving device cause apparatus measures not accurate enough because of all being arranged on the flow cell outside, produce problems such as bubble in the flow cell.
Summary of the invention
The present invention provides a kind of turbidity flow cell in order to address the above problem, and this flow cell and light-source structure form unified whole, has shortened the air line distance of the interior sample liquid of flow cell to light source greatly, has improved the accuracy of measuring.
Technical scheme of the present invention is as follows:
A kind of turbidity flow 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 described flow cell main body respectively with the waste liquid vent pipe, it is characterized in that: on the described flow cell main body wall perforation form two can be by the light source beam orifices of light, be respectively and go into 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 the described circulation cell cavity by another one light source beam orifice.
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 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 described flow cell main body respectively with the waste liquid vent pipe, it is characterized in that: also comprise transmission/reception, the part of described transmission/reception is embedded into to have on the 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 the 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 is provided with transmission/reception, the part of described transmission/reception is embedded into to have on the 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 is provided with emitter therein, and another light source beam orifice outer end is provided with receiving trap.
Described transmission/reception comprises the housing that radially cooperates with the flow cell main body, described housing be hollow, be the centrosymmetric structure of axle with the central axis, 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 is provided with internal thread, the corresponding external thread that matches with described internal thread that is provided with on the annular embeded slot internal face.
Described light source beam orifice outer end promptly also is provided with the light path fit structure that cooperates with each parts in the described housing at the correspondence position that described flow cell main body is installed 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 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 is provided with boss, and the external diameter of described ladder planar optics boss and the merging of light source beam orifice internal diameter kissing probe in the light source beam orifice; Described drying box is made of inside and outside concentric cell wall, communicates with described light source beam orifice in the internal groove side wall, and inside and outside cell wall is forming the drying agent groove that can put drying agent near flow cell main body one end by the hollow ring sealing; 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 is threaded; The boss periphery of ladder planar optics is with ladder planar optics O-ring seal in the described eyeglass groove, its diameter is provided with the ladder planar optics seal groove that can place ladder planar optics O-ring seal less than ladder planar optics boss external diameter 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 the described planar optics cone seal groove planar optics O-ring seal is set, and its diameter is less than the planar optics external diameter; Described transmission/reception housing away from be provided with on the outer face of an end of flow cell main body side make that transmission/reception and external environment completely cut off emission/reception case lid.
Described flow cell main body comprise opening up have that certain accommodation space and this space constitute the tubbiness flow cell cavity of flow cell main body inner chamber and the flow cell lid of this opening of sealing of being provided with 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 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, the flow cell body sidewall inwall that described inner concave arc surface and its are faced forms the feed liquor water channel, described feed liquor water channel is communicated with the main channel of flow cell main body, and 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 constitute 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 screw holes are set on the 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 is with O type rubber ring, its diameter is less than the diameter of flow cell lid sealing ladder step, the reduced diameter section periphery is an inner concave arc surface, described inner concave arc surface forms the feed liquor water channel during in the face of described inlet, the hollow part of flow cell lid is provided with the fluid water channel that forms for vertically connecting along cylindrical cover body axial line, described fluid water channel is communicated with described waste liquid vent pipe, and the lid bottom surface of described flow cell lid is an arc-shaped concave in the face of the face of flow cell inner chamber promptly.
Described turbidity flow cell also comprises road circulation pipe and cleaning efferent duct in the sample liquid, the road circulation pipe is the connecting pipe of the fluid water channel of the fluid water channel that covers from flow cell external communications flow cell respectively and flow cell cavity bottom in the described sample liquid, and the road circulation pipe is connected with waste liquid vent pipe and cleaning efferent duct respectively by threeway when the fluid water channel of fluid water channel that covers with flow cell respectively and flow cell cavity bottom is communicated with in the described sample liquid; Be provided with on the described flow cell cavity lateral wall flow cell is installed in flow cell fixed support on the water turbidity on-line monitoring instrument.
Technique effect of the present invention is:
The invention provides a kind of turbidity flow 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 and go into 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 the described circulation cell cavity by another one light source beam orifice.The flow cell of this structure can adopt lighttight material that can explained hereafter, as the black polyformaldehyde resin, adopts this material can produce the flow cell of moulding on production line, avoids the problem of the sealing difference that the glass structure flow cell has.
The present invention also provides a kind of turbidity flow cell, comprise with the flow cell main body and form unified whole transmission/reception, but can receive or launch light when this emission/reception housing built-in light source circuit and on-line monitoring, the turbidity flow cell of this embedded transmission/reception can shorten sample liquid in the 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 is provided with 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 take place 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 is lower than 40NTU, use 90 degree light scattering detectors measurement turbidity can effectively avoid because the interference that colourity or extinction material bring, and, increased the accuracy of measuring with minimum stray light.
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 up and down two fluid water channels and with sample liquid that these two fluid water channels link to each other in road circulation pipe, built-in light source circuit and flow cell form unified overall emission/reception housing.The turbidity flow cell of this structure, when sample liquid is measured, after liquid enters turbidity flow cell inner chamber from sample liquid feed tube, beat and having on the feed liquor water channel of arc-shaped concave, the circular arc type design of water channel can make liquid spiral down by circular arc cleverly, sample liquid current are played the effect of good decompression impact-reducing, effectively avoid sample liquid when feed liquor, to produce aeration and measure; The full flow cell inner chamber of flow of liquid loops back cavity from bottom to top by road circulation pipe in the sample liquid; At this moment the transmission/reception that is contained in the emission/reception housing on the flow cell body barrel wall is measured sample liquid, this embedded light source installation form moves to emission/reception enclosure interior with circuit of light sources, form unified whole with flow cell, shortened the air line distance of the interior sample liquid of flow cell greatly, improved the accuracy of measuring to light source; The fluid water channel two-way water outlet simultaneously that measurement finishes and can cover by the 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 of avoiding of current and produce.Whole turbidity flow cell adopts enclosed construction, water sample to be measured is by the totally-enclosed interior circulation waterway of turbidity flow cell, disposable realization feed liquor, check and analysis, discharge opeing, overall process is all finished in the turbidity flow cell, need not assistance, can realize bubble and discharge opeing work in the filtering liquid to be measured by the peace external member.
The cleaning efferent duct of installing on the flow cell can be when clean and maintenance equipment, and cleansing solution can directly be discharged by the cleaning efferent duct that flow cell bottom three-way pipe fitting left end connects, 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 emission/reception 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 the 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 flow in emission/reception housing by the interior liquid that can not of seal protection flow cell main body inner chamber; keep the dry more stable circuit of light sources environment in the emission/reception housing; sealing structure is good; use drying agent to strengthen drying effect synchronously; structural maintenance is easy for installation; external form is succinctly attractive in appearance; functional strong, can satisfy the desired structure requirement that sample liquid detects to greatest extent.
Description of drawings
Fig. 1 is a turbidity flow cell front view of the present invention;
Fig. 2 is the turbidity flow 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 a turbidity flow cell lid vertical view of the present invention;
Fig. 6 is the side sectional view of Fig. 5;
Flow cell main body base cut-open view when Fig. 7 does not install emission/reception housing for;
Fig. 8 is the partial enlarged drawing of the I of Fig. 7;
Fig. 9 is an emission/reception housing cut-open view;
Figure 10 is a 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, 3-transmission/reception, the 31-housing, 4-emission/reception case lid, road circulation pipe in the 5-sample liquid, 6-cleans efferent duct, 7-sample liquid feed tube, 8-waste liquid vent pipe, 9-flow cell fixed support, 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, 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, 29-gap.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described further.Fig. 1 is a turbidity flow cell front view of the present invention, Fig. 2 is the turbidity flow 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 a turbidity flow cell lid vertical view of the present invention, Fig. 6 is the side sectional view of Fig. 5, flow cell main body base cut-open view when Fig. 7 does not install emission/reception housing for, Fig. 8 is the partial enlarged drawing of the I of Fig. 7, Fig. 9 is an emission/reception housing cut-open view, and Figure 10 is a ladder planar optics side view, and Figure 11 is the vertical view of Figure 10, Figure 12 is the side view of drying box, and Figure 13 is the vertical view of Figure 12.
The invention provides a kind of turbidity flow 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 flow cell main body respectively with waste liquid vent pipe 8, 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, is respectively by the light of emitter emission to go into flow cell inner chamber, receiving trap by the light in the described circulation cell cavity of another one light source beam orifice 14 receptions 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 cell, and as shown in Figure 1, this turbidity flow cell also comprises transmission/reception 3, and the part of transmission/reception 3 is embedded into to have on the 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 the 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 are provided with emitter therein, and another light source beam orifice 14 outer ends are provided with receiving trap.
As Fig. 2, shown in Figure 3, above-mentioned transmission/reception 3 comprises the housing 31 that radially cooperates with the flow cell main body, as shown in Figure 9, this housing 31 for hollow, be the centrosymmetric structure of axle with the central axis, 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 that the flow cell main body is installed housing 31 is provided with annular embeded slot with chimeric hollow ring cylinder, the inboard of hollow ring cylinder is provided with internal thread 27, the corresponding external thread 26 that matches with internal thread 27 that is provided with on the 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 is provided with the light path fit structure that cooperates with each parts in the 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, constitute light source beam orifice 14, ladder planar optics seal groove 16 and the eyeglass groove 18 of printing opacity successively, the diameter of eyeglass groove 18 is less than the diameter of above-mentioned annular embeded slot inwall.
As shown in Figure 3, place ladder planar optics 15, drying box 19, planar optics 21 in the eyeglass groove 18 from the inside to surface successively; 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 are provided with boss, and the external diameter of ladder planar optics boss 28 and the merging of light source beam orifice 14 internal diameter kissings probe in the light source beam orifice 14.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 the internal groove side wall, and inside and outside cell wall is forming the drying agent groove 20 that can put drying agent near flow cell main body one end by the hollow ring sealing.Planar optics 21 external diameters and eyeglass groove 18 internal diameters match.
As shown in Figure 9, the junction of the part in logical 24 holes of the formation transmission/reception light source transmission of the hollow ring cylinder of housing 31 and housing 31 is a hollow ring plane, this plane housing 31 with fit tightly planar optics 21 after the flow cell main body is threaded.
As shown in Figure 3, boss 28 peripheries of ladder planar optics 15 are with ladder planar optics O-ring seal 17 in the eyeglass groove 18, its diameter is provided with the ladder planar optics seal groove 16 that can place ladder planar optics O-ring seal 17 less than ladder planar optics boss 28 external diameters 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, in the planar optics cone seal groove 22 planar optics O-ring seal 23 is set, and its diameter is less than planar optics 21 external diameters; Transmission/reception 3 housings 31 away from be provided with on the outer face of an end of flow cell main body side make transmission/reception 3 and external environment isolated emission/reception case lid 4.
As shown in Figure 1 and Figure 2, preferably, the flow cell main body comprise opening up have that certain accommodation space and this space constitute 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 being provided with 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 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, the flow cell body sidewall inwall that inner concave arc surface and its are faced forms feed liquor water channel 12, feed liquor water channel 12 is communicated with the main channel of flow cell main body, and the 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 constitute of its periphery by different-diameter, its enlarged diameter section and interlude are above-mentioned bound fraction, reduced diameter section is a funtion part, enlarged diameter section is the round platform that its external diameter and flow cell cavity 2 external diameters are complementary, several sunk screw holes are set on the 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 an 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 is provided with the fluid water channel 13 that forms for vertically connecting along cylindrical cover body axial line, fluid water channel 13 is communicated with waste liquid vent pipe 8, and the lid bottom surface of flow cell lid 1 is an arc-shaped concave in the face of the face of flow cell inner chamber promptly; Flow cell lid sealing ladder step 11 outer rings are with 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, the turbidity flow cell also comprises road circulation pipe 5 and cleaning efferent duct 6 in the sample liquid, road circulation pipe 5 be the connecting pipe of the fluid water channel 13 of the fluid water channel 13 from the flow cell external communications flow cell lid 1 and flow cell cavity 2 bottoms respectively in the sample liquid, in the sample liquid road circulation pipe 5 respectively with flow cell lid 1 on the fluid water channel 13 and the fluid water channel 13 of flow cell cavity 2 bottoms be connected with cleaning efferent duct 6 with waste liquid vent pipe 8 respectively by threeway when being communicated with; Be provided with on flow cell cavity 2 lateral walls flow cell is installed in flow cell fixed support 9 on the water turbidity on-line monitoring instrument.
Below be most preferred embodiment.
As Fig. 1, Fig. 2, shown in Figure 4, turbidity flow cell of the present invention for be made, have by black polyformaldehyde resin (the black polyformaldehyde resin can be avoided other catoptrical interference, improve accuracy of detection) streamline certain thickness chamber wall form 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 constitute 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 screw holes are set on the 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 an inner concave arc surface, the hollow part of flow cell lid 1 is provided with the fluid water channel 13 that forms for vertically connecting along cylindrical cover body axial line, and the lid bottom surface of flow cell lid 1 is an arc-shaped concave in the face of the face of flow cell inner chamber promptly.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 the 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 a cone tank 10, and not residual surplus liquid improved drainage effect when this cone tank 10 made draining for alleviating hydraulic pressure, and the cone tank bottom is provided with fluid water channel 13.
As shown in Figure 1, flow cell fixed support 9 is set on the flow cell lateral wall, connects 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 in, 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 the sample liquid.A straight pipe fitting connects sample liquid feed tube 7.
The assembling flow cell covers and put the O type rubber ring that is slightly less than stepped diameters in turbidity flow cell sealing ladder step 11 outer rings at 1 o'clock on the flow cell cavity 2, 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 promptly is compacted on flow cell cavity 2 surfaces, O type loop diameter is slightly less than the ladder step in addition, assembling back O-ring seal is from the installation gap closing of two directions with 2 of turbidity flow 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 the 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, on the flow cell sidewall,, constitute light source beam orifice 14, ladder planar optics seal groove 16, the eyeglass groove 18 of printing opacity successively by three annular housings that flow cell cavity 2 inwalls set gradually laterally, diameter increases successively.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 is provided with boss, and the external diameter of ladder planar optics boss 28 and the merging of light source beam orifice 14 internal diameter kissings probe in the light source beam orifice 14; 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 the internal groove side wall, inside and outside cell wall is forming the drying agent groove 20 that can put drying agent near flow cell cavity 2 one ends by the hollow ring sealing, the end that internal groove side wall contacts with planar optics 21 is provided with two gap 29, and this gap 29 can make the drying agent in the drying box 19 keep drying in the 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 the annular embeded slot inwall external thread 26 to be set.This flow cell also comprises the housing 31 that radially cooperates with the flow cell main body, as shown in Figure 9, the housing 31 of this transmission/reception 3 for hollow, be the centrosymmetric structure of axle with the central axis, the one end is provided with internal thread 27, the housing 31 of transmission/reception 3 is connected with corresponding position external thread 26 on the flow cell cavity 2 by this internal thread 27, is provided with in it from the distal-to-proximal light source mounting groove 25 that sets gradually of flow cell cavity, light source transmission through hole 24; Housing 31 inside of transmission/reception 3 are fixed on the circuit light source in the light source mounting groove 25 by screw.The dual seal mode is adopted in sealing herein, one deck has sealed the primary seal effect, by add the O type rubber ring that the cover internal diameter is slightly less than the boss diameter on ladder planar optics boss 28 external diameters is that ladder planar optics O-ring seal 17 realizes that the rubber ring frame after the 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 assembling back rubber ring frame is in the tapered seal groove of the planar optics that is arranged on eyeglass groove 18 outer ends 22 surfaces.Because the thickness of ladder planar optics boss 28, planar optics 21 and the stacked backwardness of O-ring seal is greater than the degree of depth of 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 cell respective surfaces, good sealing function is reliably played in the complete filling slit.One deck sealing guaranteed sample liquid in the flow cell appropriate be sealed in turbidity flow cell inner chamber, two layers of sealing then form the secondary insurance between water route and circuit of light sources, during as one deck sealing wear or accidental water leakage, can guarantee the safety at circuit light source place 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, is finally gone into 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 emission/reception housing 31 and external environment isolated, install emission/reception case lid 4 additional, connect by screw, make emission/reception housing 31 inner sealings and the isolated effect of external environment of realizing.For building dry more 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 desiccant-filled particle is strengthened drying effect in drying agent groove 20.
When sample liquid is measured, liquid enters turbidity flow cell inner chamber from sample liquid feed tube 7, beat on feed liquor water channel 12, the circular arc type design of water channel can make liquid spiral down by circular arc cleverly, sample liquid current are played the effect of good decompression impact-reducing, effectively avoid sample liquid when feed liquor, to produce aeration and measure.The full flow cell inner chamber of flow of liquid, the three-way pipe fitting outflow by the lower end loops back cavity from bottom to top by road circulation pipe 5 in the threeway right-hand member sample liquid.When measurement finishes, can be by closed circuit under the flow cell, and through hole two-way water outlet simultaneously on the top flow cell lid 1, with cover threeway left end waste liquid vent pipe 8 and converge the discharge cavity, circular arc type design immediate decompression impact-reducing when discharge opeing of fluid water channel 13 on the flow cell lid 1 can relax the more effective bubble of avoiding of current and produce, 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 surplus liquid.When equipment cleaning was safeguarded, cleansing solution can promptly clean efferent duct 6 by flow cell bottom three-way pipe fitting left end connecting leg and directly discharge, and was 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 the flow cell cavity horizontal section position at right angle each other, because of granule more effective for the scattering ratio of short wavelength light for the scattering of long wavelength's light, when turbidity value is lower than 40NTU, use 90 degree light scattering detectors measurement turbidity can effectively avoid because the interference that colourity or extinction material bring, 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 the emitter, photodiode is set in the receiving trap.
The turbidity flow cell adopts enclosed construction, water sample to be measured is by the totally-enclosed interior circulation waterway of turbidity flow cell, disposable realization feed liquor, check and analysis, discharge opeing, overall process is all finished in the turbidity flow cell, need not assistance, can realize bubble and discharge opeing work in the filtering liquid to be measured by the peace external member.And light source is installed in emission/reception housing 31, and embedded structure makes light source nearer apart from liquid to be measured, makes measurement data more accurate.Sealing structure is good, promptly adds desiccant box in the structure, uses drying agent to strengthen drying effect synchronously.This device characteristic is a compactness simple for structure, can get rid of bubble in the liquid to be measured in the 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 install maintenance, cleans to make things convenient for blowdown totally thorough.
The arcuate structure of inner each water channel of turbidity flow cell makes current milder, avoid bubble to produce, and whole circulation is finished compact conformation in turbidity flow cell inside, under the totally enclosed state of turbidity flow cell, finish feed liquor, discharge opeing, cleaning, have good globality.And mechanism's sealing is good, and embedded light source installation form moves to emission/reception enclosure interior with circuit of light sources, forms unified integral body with flow cell, has shortened the air line distance of the interior sample liquid of flow cell to light source greatly, 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 the desired structure requirement that sample liquid detects to greatest extent.
The above only is a preferred implementation 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 (10)
1. turbidity flow 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 described flow cell main body respectively with the waste liquid vent pipe, it is characterized in that: on the described flow cell main body wall perforation form two can be by the light source beam orifices of light, be respectively and go into 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 the described circulation cell cavity by another one light source beam orifice.
2. turbidity flow cell according to claim 1 is characterized in that: 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.
3. turbidity flow 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 described flow cell main body respectively with the waste liquid vent pipe, it is characterized in that: also comprise transmission/reception, the part of described transmission/reception is embedded into to have on the certain thickness flow cell main body wall with the flow cell main body and forms integrative-structure.
4. turbidity flow cell according to claim 1 is characterized in that: described transmission/reception is divided into emitter and receiving trap, is separately positioned on the flow cell main body horizontal section each other on the position at right angle.
5. according to claim 2 or 4 described turbidity flow cells, it is characterized in that: 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 is provided with transmission/reception, the part of described transmission/reception is embedded into to have on the 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 is provided with emitter therein, and another light source beam orifice outer end is provided with receiving trap.
6. turbidity flow cell according to claim 5, it is characterized in that: described transmission/reception comprises the housing that radially cooperates with the flow cell main body, described housing be hollow, be the centrosymmetric structure of axle with the central axis, 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 is provided with internal thread, the corresponding external thread that matches with described internal thread that is provided with on the annular embeded slot internal face.
7. turbidity flow cell according to claim 6, it is characterized in that: described light source beam orifice outer end promptly also is provided with the light path fit structure that cooperates with each parts in the described housing at the correspondence position that described flow cell main body is installed 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 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 is provided with boss, and the external diameter of described ladder planar optics boss and the merging of light source beam orifice internal diameter kissing probe in the light source beam orifice; Described drying box is made of inside and outside concentric cell wall, communicates with described light source beam orifice in the internal groove side wall, and inside and outside cell wall is forming the drying agent groove that can put drying agent near flow cell main body one end by the hollow ring sealing; 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 is threaded; The boss periphery of ladder planar optics is with ladder planar optics O-ring seal in the described eyeglass groove, its diameter is provided with the ladder planar optics seal groove that can place ladder planar optics O-ring seal less than ladder planar optics boss external diameter 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 the described planar optics cone seal groove planar optics O-ring seal is set, and its diameter is less than the planar optics external diameter; Described transmission/reception housing away from be provided with on the outer face of an end of flow cell main body side make that transmission/reception and external environment completely cut off emission/reception case lid.
8. according to the described turbidity flow cell of one of claim 1 to 7, it is characterized in that: described flow cell main body comprise opening up have that certain accommodation space and this space constitute the tubbiness flow cell cavity of flow cell main body inner chamber and the flow cell lid of this opening of sealing of being provided with 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 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, the flow cell body sidewall inwall that described inner concave arc surface and its are faced forms the feed liquor water channel, described feed liquor water channel is communicated with the main channel of flow cell main body, and described flow cell bottom is provided with the fluid water channel that is communicated with the waste liquid vent pipe.
9. turbidity flow cell according to claim 8, it is characterized in that: described flow cell lid is the three section hollow cylinder lids that constitute 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 screw holes are set on the 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 is with O type rubber ring, its diameter is less than the diameter of flow cell lid sealing ladder step, the reduced diameter section periphery is an inner concave arc surface, described inner concave arc surface forms the feed liquor water channel during in the face of described inlet, the hollow part of flow cell lid is provided with the fluid water channel that forms for vertically connecting along cylindrical cover body axial line, described fluid water channel is communicated with described waste liquid vent pipe, and the lid bottom surface of described flow cell lid is an arc-shaped concave in the face of the face of flow cell inner chamber promptly.
10. turbidity flow cell according to claim 9, it is characterized in that: described turbidity flow cell also comprises road circulation pipe and cleaning efferent duct in the sample liquid, the road circulation pipe is the connecting pipe of the fluid water channel of the fluid water channel that covers from flow cell external communications flow cell respectively and flow cell cavity bottom in the described sample liquid, and the road circulation pipe is connected with waste liquid vent pipe and cleaning efferent duct respectively by threeway when the fluid water channel of fluid water channel that covers with flow cell respectively and flow cell cavity bottom is communicated with in the described sample liquid; Be provided with on the described flow cell cavity lateral wall flow cell is installed in flow cell fixed support on the 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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| CN 201010202560 CN102288544B (en) | 2010-06-17 | 2010-06-17 | Turbidity flowing cell |
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| CN105247344A (en) * | 2013-05-09 | 2016-01-13 | 国立大学法人德岛大学 | Raw material fluid density detector |
| CN107076670A (en) * | 2014-09-19 | 2017-08-18 | 哈希公司 | Scattering formula nephelometer with axially illumination and circular photodetector |
| CN107532995A (en) * | 2015-04-24 | 2018-01-02 | 株式会社岛津制作所 | Optical assay device |
| CN108107011A (en) * | 2017-12-30 | 2018-06-01 | 北方工业大学 | Intelligent sensor based on double-light-source water quality COD detection parameters |
| CN110132905A (en) * | 2019-05-29 | 2019-08-16 | 清华大学 | Liquid pool device and its dynamic measurement system for Peace Park instrument |
| CN110325830A (en) * | 2017-02-23 | 2019-10-11 | 锋翔科技公司 | Integrated irradiating and detecting flow cell for liquid chromatogram |
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| 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 |
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| CN105247344A (en) * | 2013-05-09 | 2016-01-13 | 国立大学法人德岛大学 | Raw material fluid density detector |
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| CN110132905A (en) * | 2019-05-29 | 2019-08-16 | 清华大学 | Liquid pool device and its dynamic measurement system for Peace Park instrument |
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| CN102288544B (en) | 2013-05-22 |
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