CN101738432A - Concentration measuring apparatus with corrosion resistance - Google Patents
Concentration measuring apparatus with corrosion resistance Download PDFInfo
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- CN101738432A CN101738432A CN200810234242A CN200810234242A CN101738432A CN 101738432 A CN101738432 A CN 101738432A CN 200810234242 A CN200810234242 A CN 200810234242A CN 200810234242 A CN200810234242 A CN 200810234242A CN 101738432 A CN101738432 A CN 101738432A
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- transducer
- measuring apparatus
- concentration measuring
- concentration
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Abstract
The invention belongs to the technical field of analyzers, particularly to a concentration measuring apparatus for a strong corrosion medium. The concentration measuring apparatus is mainly characterized by being internally provided with an ultrasonic transducer with corrosion resistance and comprises a transducing element, an emitting face, a measuring barrel and a reflector, wherein the transducing element is tightly arranged at one end of an inner barrel of a transducer shell, the measuring barrel is connected with the transducer shell, and the reflector with a reflecting face is arranged at the other end of the measuring barrel. By selecting the structural design and materials, the concentration measuring apparatus is practical and convenient and suitable for corrosion-resistance concentration measurement in a plurality of working conditions.
Description
Technical field: the invention belongs to technical field of analytical instruments, be specifically related to a kind ofly can be applied to the instrument that strong corrosive medium carries out concentration analysis.
Background technology: in the analyser of measuring strong corrosive medium (as red fuming nitric acid (RFNA), the concentrated sulphuric acid) concentration, it is best choice that the utilization ultrasound wave is finished, and the material of its critical component transducer and structure are the analyser key points of operate as normal for a long time.Common ultrasonic transducer is owing to the field difference of its application, and the ultrasonic frequency of its generation and the measured medium that is suitable for all can not satisfy the requirement of strong corrosive medium.
Summary of the invention: the objective of the invention is by selection, design a kind of measuring instrument of measuring Korrosionsmedium concentration that is applicable to transducer structure Design and material therefor.
The present invention is provided with a kind of corrosion resistant ultrasonic transducer to realize in measuring instrument, mainly comprise: sealing is arranged at the inverting element and the surface of emission of transducer enclosure inner core one end, the measurement tube that is connected with transducer enclosure is arranged at the reverberator that has reflecting surface of measuring the tube other end.
The present invention can adopt the piezoelectric ceramics disk with piezoelectric effect as inverting element, convert electric pulse to mechanical vibration and produce (ultrasound wave), otherwise also can convert the ultrasound wave that acts on the piezoelectric ceramics disk to electric signal, ultrasound wave is propagated back and forth at transmitting-receiving face and reflecting surface.Used piezoelectric ceramics is 1.2mm for the zirconium metatitanic acid bores wafer thickness, diameter 18mm.
The inverting element (piezoelectric ceramic wafer) that this transducer adopts transmitting-receiving to share, promptly hyperacoustic transmitting and receiving by same inverting element (piezoelectric ceramic wafer) realize, thereby simplified the structure of transducer.Whole energy transducer is formed by a plurality of unit constructions, and cooperatively interacting by screw thread and sealing gasket forms a whole.Each parts of transducer are independent workpiece, and can dismantle easily.Thereby make that the manufacturing procedure of each parts is simple.In the process of repairing and debugging, can change individual component easily like this, and need not integral replacing.Transducer adopts the flange mounting means with being connected of technological process, so that be suitable for various technological processs.
The shell of transducer of the present invention adopts teflon, can be suitable for most strong corrosive media; Transmitting-receiving face adopts flat glass, can guarantee the smooth and corrosion resistant performance of receiving and dispatching; Sealing surface adopts the plane expanded polytetrafluoroethyltoe; The material of joint flange can be decided according to the difference of measured medium, for example, can adopt rafifinal for red fuming nitric acid (RFNA), then can adopt 316L for the concentrated sulphuric acid.
Description of drawings: accompanying drawing 1 is an embodiment of the invention structural representation sketch, and among the figure, 1-measures tube; The 2-transducer enclosure; The 3-joint flange; 4-surface of emission sealing gasket; The 5-surface of emission; The 6-piezoelectric crystal; The 7-seal joint; 8-crystal hold-down bolt; 9-joint flange gland nut; The 10-sealing gland; 11-transducer sealing gasket; 12-reverberator shell; 13-reverberator gland nut; The 14-reflecting surface.
Embodiment: the present invention is described in detail below in conjunction with accompanying drawing 1 and embodiment.
Embodiment: the present embodiment emphasis carries out with critical component ultrasonic transducer of the present invention.Utilize measurement tube 1 to realize the relative fixed of the two between the surface of emission 5 and the reflecting surface 14,, measure tube 1 simultaneously and also provide a passage for hyperacoustic propagation to guarantee constant distance between the two.The uniform aperture in side can make measured medium constantly be replaced; Sealing gasket 4 between the surface of emission 5 and the transducer adopts expanded polytetrafluoroethyl,ne, utilizes the pressuring action of sealing gland 10 and seal joint 7 to realize sealing between the surface of emission 5 and the transducer; Coupling between the piezoelectric crystal 6 and the surface of emission 5 adopts the high temperature silicone grease to make couplant, and by crystal hold-down bolt 8 piezoelectric crystal 6 and the surface of emission 5 is closely cooperated, and must not have bubble to exist in the coupling layer; Transducer and sealing between the joint flange 3 are to adopt that M40 * 2 coarse threads reach sealing purpose with cooperating of joint flange gland nut 9 on the transducer enclosure 2, and sealing gasket 11 is an expanded polytetrafluoroethyl,ne; Reflecting surface 14 is installed in the reverberator shell 12, utilizes reflecting surface gland nut 13 to be fixed, and does not need to add in addition sealing gasket.
Transducer of the present invention needs and specific circuit is used.Circuit should at first apply a spike pulse (transponder pulse) on two lead-in wires of inverting element (piezoelectric ceramic wafer), trigger inverting element (piezoelectric ceramic wafer), makes it to produce ultrasonic vibration (hyperacoustic emission).This ultrasound wave is reflected back toward the surface of emission again after reaching reflecting surface through the measured medium in the measurement tube, and act on inverting element (piezoelectric ceramic wafer) by the surface of emission and go up to produce corresponding pulse (received pulse), measure mistiming between transponder pulse and the received pulse by electronic circuit again, be the time that ultrasound wave is propagated in measured medium, and obtain the speed that ultrasound wave is propagated thus in measured medium.
This method is applied in the measurement of concentration of nitric acid, be exactly according to ultrasound wave nitric acid medium in velocity of propagation and the relation of concentration, obtain concentration of nitric acid.
Claims (1)
1. a concentration measuring apparatus with corrosion resistance mainly is corrosion resistant ultrasonic transducer to be set realize in measuring instrument.It is characterized in that transducer comprises that mainly sealing is arranged at the inverting element and the surface of emission of transducer enclosure inner core one end, the measurement tube that is connected with transducer enclosure is arranged at the reverberator that has reflecting surface of measuring the tube other end; The inverting element piezoelectric ceramics is that thickness is 1.2mm, and the zirconium metatitanic acid of diameter 18mm bores wafer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810234242A CN101738432A (en) | 2008-11-18 | 2008-11-18 | Concentration measuring apparatus with corrosion resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810234242A CN101738432A (en) | 2008-11-18 | 2008-11-18 | Concentration measuring apparatus with corrosion resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101738432A true CN101738432A (en) | 2010-06-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810234242A Pending CN101738432A (en) | 2008-11-18 | 2008-11-18 | Concentration measuring apparatus with corrosion resistance |
Country Status (1)
| Country | Link |
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| CN (1) | CN101738432A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634838A (en) * | 2015-02-05 | 2015-05-20 | 左海彤 | Concentration meter for monitoring electrolyte of lead-acid storage battery |
| CN109507300A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field measuring method and device in a kind of high-temperature material directional solidification process |
-
2008
- 2008-11-18 CN CN200810234242A patent/CN101738432A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104634838A (en) * | 2015-02-05 | 2015-05-20 | 左海彤 | Concentration meter for monitoring electrolyte of lead-acid storage battery |
| CN104634838B (en) * | 2015-02-05 | 2017-05-17 | 左海彤 | Concentration meter for monitoring electrolyte of lead-acid storage battery |
| CN109507300A (en) * | 2018-11-20 | 2019-03-22 | 西北工业大学 | Sound field measuring method and device in a kind of high-temperature material directional solidification process |
| CN109507300B (en) * | 2018-11-20 | 2019-08-09 | 西北工业大学 | A kind of sound field measuring method in high-temperature material directional solidification process |
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Application publication date: 20100616 |