CN2154348Y - Consistency determining instrument for drilling liquid polymer - Google Patents

Abstract

The utility model provides a consistency determining instrument for drilling liquid polymers. The circuits of the utility model comprise an input buffer and temperature compensation circuit, a function selection circuit, a scale adjustment circuit, and an exponential transformation circuit, and the utility model also comprises a digital display. The electric potential or the consistency of the drilling liquid polymers is directly measured through gas sensing electrodes so that convenience is arranged for drilling on site, and the consistency of the polymers can be accurately controlled in time. The utility model has the advantages of small size and convenient carrying, being suitable for polymer drilling fluid which uses multiple copolymers as main polymers, wherein, the multiple copolymers contain acid amide groups and ammonium salt.

Description

Consistency determining instrument for drilling liquid polymer

The constantly progressive and development along with the polymer drilling fluid application technology, how in time to measure and rationally control polymer concentration in the drilling fluid then, guarantee that it is stable and reliable for performance, being subjected to professional day by day payes attention to, whether polymer concentration control is proper, is the key factor that this class drilling fluid uses success or failure.Present domestic shortage is suitable for the short-cut method and the supporting means of on-site measurement, and on-the-spot mensuration to polymer concentration only is confined to estimate by rule of thumb that the polymer concentration control of carrying out thus is not the amount of owing often, is exactly excessive, is difficult for obtaining promising result.Though also had some analysis determining methods to recommend the scene, eventually because of operating cumbersome or error is not accepted by the scene greatly.

The purpose of this utility model is to provide the drilling fluid polymer concentration analyzer of a kind of circuit design based on characteristic group's analytic approach and ISE mensuration.

The utility model drilling fluid polymer concentration analyzer is achieved in that it is made up of casing and the wiring board that is arranged in the casing.The wiring board circuit comprises input buffering and temperature-compensation circuit, and function selector circuit, ratio are adjusted circuit, exponential transform circuit, digital display and power supply.Its circuit is connected to, IO buffering and temperature-compensation circuit behind electrode signal and the location voltage signal superposition, and its output connection function is selected circuit input end, when function selecting is current potential " mv " measurement, function selector circuit output termination digital display; When function selecting was concentration " mg/L " measurement, its output termination ratio was adjusted circuit input end, and ratio is adjusted circuit output end and connect the exponential transform circuit input end, and exponential transform circuit output end connection function is selected circuit input end.

Wherein input buffering and temperature-compensation circuit are, electrode signal Vi is connected to input socket X1 positive pole, behind the location voltage Vc superposition that is connected to the X1 negative pole, enter the in-phase input end IN+1 of the integrated double operational IC1 of high resistant from resistance R 4 through the corner, resistance R 5 between the 3a of the IN-1 of IC1 end and three road bidirectional electronic switch IC3 end constitutes input buffering and temperature-compensation circuit in potentiometer RP2 between IC1 inverting input IN-1 and the output OUT1 and cross-over connection in cross-over connection, regulate RP2 and can carry out temperature-compensating within the specific limits, circuit output signal V1 at the corresponding levels is from the OUT1 end output of IC1; Function selector circuit is, OUT1 by IC1 holds the signal V1 of output to enter the 1b end of three road bidirectional electronic switch IC3, enter the 2a end through the corner from resistance R 7 simultaneously, when functional select switch SB2 places " mv " function, the 1b end of IC3 is logical with the 1c termination, signal V1 is held by the IN+ that the output of 1c end enters digital display VM1, demonstrates a millivolt value; When SB2 placed " mg/L " function, the 2a of IC3 end was logical with the 2c termination, and signal V1 is entered the IN+2 end of IC1 by the output of 2c end.Circuit at the corresponding levels is finished function selecting and corresponding signal switch operating; Ratio is adjusted circuit, 2c by IC3 holds the signal of output to enter the IN+2 end of IC1 at the corresponding levels, the potentiometer RP3 of cross-over connection between the IN-2 of IC1 end and OUT2 end, and cross-over connection constitutes the in-phase proportion amplifier in IN-2 and the resistance R between ground 6 of IC1, regulate RP3, can carry out the ratio adjustment, output signal V2 at the corresponding levels is by the OUT2 end output of IC1.The exponential transform circuit is that the signal V2 of the OUT2 end output of higher level IC1 enters the IN1 end of antilogarithm module I C2, is held by OUT end output signal V3 to IC31a behind transformation transformation, is entered the IN+ end of digital display VM1 by the 1c end output of IC3; The signal input part IN-ground connection of digital display VM1, V '+termination power V '+, signal input part IN+ connects the 1c end of IC3, and decimal point control end D2 connects the 3b end of IC3.Power supply is conventional integrated stable voltage circuit PW1, input 220V AC power, and direct-current power supply circuit workings at different levels such as output V+, V-, V+ ', VR+ and VR-are used.

Describe the utility model embodiment in detail below in conjunction with accompanying drawing.

Fig. 1: the utility model circuit block diagram

Fig. 2: the utility model circuit connection diagram

The circuit of the utility model drilling fluid polymer concentration analyzer is connected to, the pin 1 that electrode signal input socket X1, corner adjust potentiometer RP1, temperature-compensating potentiometer RP2 and resistance R 5, short switch SB1 and the integrated double operational CA3240 of high resistant from resistance R 1 and R4, divider resistance R2 and R3, location circuit formation input buffering and temperature-compensation circuit to the pin 3.The termination reference voltage VR+ of R2, another termination RP1 one end of R2, meet reference voltage VR-behind the RP1 other end series connection R3, the RP1 sliding end takes out location voltage Vc and connects R1 one end, another termination of R1 X1 negative pole, SB1 one termination X1 negative pole, SB1 other end ground connection, electrode signal Vi connects the X1 positive pole, and inserts R4 one end behind the Vc superposition of X1 negative pole, another termination of R4 CA3240 pin 3, CA3240 pin 2 links to each other with R5 one end with RP2 respectively, and the RP2 other end and its slip termination CA3240 pin 1, the other end of R5 insert integrated electronic switch IC3 pin 13, CA3240 pin 4 meets power supply V-, and pin 8 meets power supply V+; Integrated electronic switch CD4053, corner constitute function selector circuit from resistance R 7, functional select switch SB2, current-limiting resistance R9 and R10, " mv " indicator VD1 and " mg/L " indicator VD2.CD4053 pin 1 connect antilogarithm module ZF755P pin 3 and the series connection R8 after pin 5, CD4052 pin 2 connects CA3240 pin 1, connects CA3240 pin 1 behind the CD4053 pin 3 series connection R7, and CD4053 pin 4 connects CA3240 pin 5, pin 5, pin 6 and pin 8 common grounds, pin 7 meets power supply V-, and pin 9, pin 10 and pin 11 are with being connected to SB2 pin 5, and pin 12 meets the decimal point control end D2 of digital display VM1, pin 13 connects R5 one end, pin 14 ground connection, pin 15 meet VM1 signal input part IN+, and pin 16 meets power supply V+.SB2 pin 1 connects VD1 one end, and its pin 2 and pin 4 are connected to ground altogether, and pin 3 connects VD2 one end, and pin 6 connects R10 one end, and the end of VD1 and VD2 and R9 one end join, another termination power V ' of the R9 other end and R10+; CA3240 pin 5 is to pin 7 interior circuit, and resistance R 6, ratio are adjusted potentiometer RP3 composition and adjusted circuit.CA3240 pin 5 connects CD4053 pin 4, and CA3240 pin 6 connects RP3 and R6 one end, another termination of RP3 CA3240 pin 7 and ZF755P pin 1, and connect self sliding end, R6 other end ground connection; Antilogarithm module ZF755P, feedback resistance R8 and imbalance are adjusted potentiometer RP4 and are constituted the exponential transform circuit.ZF755P pin 1 connects CA3240 pin 7, and its pin 3 connects R8 one end and CD4053 pin 1, and pin 5 connects the R5 other end, and pin 6 connects power supply V-and RP4 one end, pin 7 ground connection, and pin 8 connects the power supply V+ and the RP4 other end, and pin 9 connects the RP4 sliding end, adjusts RP4 and can adjust imbalance zero; 41/2 LED digital display CD4802, signal input part IN-ground connection, V '+connect power supply V '+, signal input part IN+ connects CD4053 pin 15, and decimal point control end D2 connects CD4053 pin 12; Power supply is conventional integrated stable voltage circuit PW1, input 220V AC power, and direct-current power supply circuit workings at different levels such as output V+, V-, V+ ', VR+ and VR-are used.

Claims (2)

1, a kind of drilling fluid polymer concentration analyzer, form by casing and the wiring board that is arranged in the casing, the circuit that it is characterized in that wiring board comprises input buffering and temperature-compensation circuit, function selector circuit, ratio is adjusted circuit, exponential transform circuit and digital display, its annexation is, IO buffering and temperature-compensation circuit behind electrode signal and the location voltage signal superposition, its output connection function is selected circuit input end, the function selector circuit output connects digital display respectively and ratio is adjusted circuit input end, ratio is adjusted circuit output end and is connect the exponential transform circuit input end, and exponential transform circuit output end connection function is selected circuit input end.

2, drilling fluid polymer concentration analyzer as claimed in claim 1 is characterized in that input buffering and temperature-compensation circuit are made of electrode signal input socket X1, the integrated double operational IC1 of high resistant, the potentiometer RP2 and the peripheral circuit thereof of cross-over connection between IC1 inverting input IN-1 and output OUT1; Function selector circuit is made of three road bidirectional electronic switch IC3, functional select switch SB2 and peripheral circuit thereof; Ratio is adjusted circuit by the integrated double operational IC1 of high resistant, and cross-over connection is in inverting input IN-2 and potentiometer RP3 between the output OUT2 and the peripheral circuit formation thereof of IC1; The exponential transform circuit is made of antilogarithm module I C2 and peripheral circuit thereof.

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