CN2746388Y

CN2746388Y - Distillation automatic investigator

Info

Publication number: CN2746388Y
Application number: CN 200420082044
Authority: CN
Inventors: 陈国良
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-23
Filing date: 2004-08-23
Publication date: 2005-12-14
Anticipated expiration: 2014-08-23

Abstract

The utility model relates to a distillation automatic investigator, which mainly comprises a temperature control and measuring module(21), a semiconductor refrigeration (heating) module (22), a displaying and printing module (23), an ADuc834 microcontroller (20). The utility model is characterized in that an oil drop pulse width measuring module (24) is provided, which comprises a recovery funnel (16) with a photosensor (18), a recovery cylinder (19) and a measuring circuit for pulse width (17). The photosensor (18) is connected with the input of the measuring circuit for pulse width (17); the output of the measuring circuit for pulse width (17) is connected with the ADuc834 microcontroller (20); each functional module is centrally controlled and operated by the ADuc834 microcontroller (20); Compared with the prior art, the utility model has the advantages that the tracking device with higher cost introducing errors and step motor transmission actuator are omitted, the measuring circuit for pulse width without a mechanic gearing is adopted, and measuring accuracy is improved and the cost is saved.

Description

The distillation automatic analyzer

Technical field

The utility model relates to a kind of distillation automatic analyzer, especially a kind of tester that is used for testing stone oil product boiling range.

Background technology

Boiling range is one of main physical and chemical index of petroleum products, and it both we can say the boiling spread of alum oil product, can judge the big body burden of weight component in the petroleum products composition again.Therefore boiling range is measured, and for aspects such as the production of petroleum products, use, storages important meaning is arranged all.In mensuration, need to know initial boiling point, the end point of distillation and 5%, 10%, 20% pairing temperature during 95% recovery per cent by the time, because degree of accuracy when recovery volume and recovered temperature read and instantaneity require high, the information that whether can accurately obtain recovery per cent just seems very important.Existing domestic and international automatic detection instrument all adopts the liquid level in the stepper motor device tracking recovery graduated cylinder, and the determination of distillation instrument of reporting as article " development of petroleum products automatic distillation analyzer " (" industrial instrument and automation equipment " 2001 (3) .-19-21) adopts liquid level stepping tracking means to carry out the measurement of recovery volume.The said method weak point is that all there are intrinsic error in the tracking means of instrument itself and stepper motor gearing, will certainly cause the measuring error of recovery volume, and can improve instrument cost, and this in addition method also must adopt fixing special-purpose graduated cylinder, and the assurance graduated cylinder is not changed.

Summary of the invention

The purpose of this utility model is to provide the measured for petroleum product distillation instrument of a kind of automaticity height, accuracy and good reliability, moderate cost, solves in the prior art not enough.

Technical solution of the present utility model is: a kind of distillation automatic analyzer, mainly comprise temperature control and measurement module, semiconductor refrigerating (heating) module, show print module, ADuC834 microcontroller and oil droplet pulse width measure module: the temperature control and measurement module is made up of zero-cross triggering circuit, controllable silicon, electric furnace, distilling flask and Pt1000 platinum sensor, the Pt1000 platinum sensor is installed in the distilling flask, detect the recovered temperature in the distilling flask, distilling flask places on the electric furnace, and electric furnace is connected with controllable silicon with zero-cross triggering circuit; Semiconductor refrigerating (heating) module is made up of semiconductor stack, PWM pulse-width modulation circuit, cryostat, graduated cylinder bath, condenser pipe, temperature sensor, the break-make of the PWM pulse-width modulation waveform control semiconductor stack that the ADuC834 microcontroller produces, with guarantee cryostat, the graduated cylinder bath temperature is adjustable in 0～60 ℃ scope, detects the temperature that cryostat, graduated cylinder are bathed with the DS18B20 digital temperature sensor; Show that print module is made up of input-output device such as LCD, keyboard, printer etc.; Oil droplet pulse width measure module is by the recovery funnel that photoelectric sensor is installed, reclaiming graduated cylinder and pulse width measurement circuit forms, photoelectric sensor connects the input end of pulse width measurement circuit, the output terminal of pulse width measurement circuit links to each other with microcontroller, the recovery funnel of oil droplet pulse width measure module connects the condenser pipe delivery outlet, receive the condensing droplet that condenser pipe oozes by the photoelectric sensor that reclaims funnel, and convert electric signal to, by pulse width measurement circuit the pairing electric pulse of each drop is shaped to square wave, by the ADuC834 microcontroller calculate that pulse width adds up and, thereby can add up and reflect the volume that reclaims withdrawal liquid in the graduated cylinder with pulse width.Different oil products can be revised on the basis of a demarcation Oil Recovery volume.Above-mentioned each main functional modules is electrically connected to the ADuC834 microcontroller respectively, carries out centralized control and computing by it.

It is higher and can introduce tracking means and the stepper motor gearing of error that advantage compared with prior art of the present utility model has been to save cost, adopted the pulse width measurement circuit that does not have mechanical gearing to improve measuring accuracy, saves cost.

Description of drawings

Fig. 1 is a distillation automatic analyzer modular structure synoptic diagram

Fig. 2 is distillation automatic analyzer pulse width measurement circuit figure

Embodiment

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

According to shown in Figure 1, zero-cross triggering circuit 1 connects controllable silicon 2 and electric furnace 3, and distilling flask 4 places on the electric furnace 3, and Pt1000 platinum sensor 5 detects distilling flask 4 temperature, temperature signal is transferred to ADuC834 microcontroller 20, and each part mentioned above is formed temperature control and measurement module 21; PWM pulse-width modulation circuit 6 connects semiconductor stack 7, the temperature of control cryostat 8, condenser pipe 9 places cryostat 8, DS18B20 digital temperature sensor 11 detects the temperature of cryostat 8 and graduated cylinder bath 10, temperature detection signal input ADuC834 microcontroller 20, above-mentioned semiconductor refrigerating (heating) module 22 of having formed; Input-output device such as LCD 12, keyboard 13, printer 14 are electrically connected with ADuC834 microcontroller 20, show all kinds of parameters of printout, form to show print module 23; The recovery funnel 16 that photoelectric sensor 18 is installed places and reclaims on the graduated cylinder 19, photoelectric sensor 18 connects the input end of pulse width measurement circuit 17, the output terminal of pulse width measurement circuit 17 links to each other with ADuC834 microcontroller 20, and each part mentioned above is formed oil droplet pulse width measure module 24; 20 pairs of each functional modules of ADuC834 microcontroller are carried out centralized control and computing.

According to shown in Figure 2, pulse width measurement circuit comprises that reception diode 25 1 ends and the resistance R 1 26 of infrared photoelectric sensor are in series, other end ground connection, the A end was connected to comparer 31 positive poles, other end ground connection after emitting diode 27 was connected with resistance R 2 28, resistance R 4 30 and resistance R 3 29 series connection back intermediate points are connected to comparer 31 negative poles, other end ground connection, and the end of resistance R 1 26, R2 28, R3 29 and R5 32 is connected positive source jointly.Resistance R 1, R3 can choose 1k Ω, and R2 chooses 30k Ω, and R5 chooses 4.7k Ω.The output terminal of resistance R 532 and comparer 31 is received the input end of Sheffer stroke gate Y1 33.Sheffer stroke gate Y1 33 output terminals are connected to the input end of clock of trigger D1 36 and two input ends of Sheffer stroke gate Y2 34, and Sheffer stroke gate Y2 34 output terminals are connected to the input end of clock of trigger D237.The output terminal of trigger D1 36, D2 37 links to each other with Sheffer stroke gate Y3 35, and the output terminal of Sheffer stroke gate Y3 35 is received ADuC834 microcontroller 20, is convenient to ADuC834 microcontroller 20 accumulative total pulse widths.

Claims

1. one kind is distilled automatic analyzer, comprising:

Temperature control and measurement module (21), form by zero-cross triggering circuit (1), controllable silicon (2), electric furnace (3), distilling flask (4) and Pt1000 platinum sensor (5), Pt1000 platinum sensor (5) is installed in the distilling flask (4), distilling flask (4) places on the electric furnace (3), and electric furnace (3) is connected with ghyristor circuit (2) with zero-cross triggering circuit (1);

Semiconductor refrigerating (heating) module (22) is made up of semiconductor stack (7), PWM pulse-width modulation circuit (6), cryostat (8), condenser pipe (9), graduated cylinder bath (10), temperature sensor (11);

Show print module (23), form by LCD (12), keyboard (13), printer input-output device such as (14) etc.;

ADuC834 microcontroller (22);

It is characterized in that, also comprise oil droplet pulse width measure module (24), form by the recovery funnel (16) that photoelectric sensor (18) is installed, recovery graduated cylinder (19) and pulse width measurement circuit (17), photoelectric sensor (18) connects the input end of pulse width measurement circuit (17), and the output terminal of pulse width measurement circuit (17) links to each other with microcontroller (20);

Above-mentioned each main functional modules is electrically connected to ADuC834 microcontroller (20) respectively, carries out centralized control and computing by it.

2. distillation automatic analyzer according to claim 1, the recovery funnel (16) that it is characterized in that described oil droplet pulse width measure module (24) connects condenser pipe (9) delivery outlet, receive the condensing droplet that condenser pipe (9) oozes by the photoelectric sensor (18) that reclaims funnel (16), and convert electric signal to, by pulse width measurement circuit (17) the pairing electric pulse of each drop is shaped to square wave, by ADuC834 microcontroller (20) calculate that pulse width adds up and, add up and convert recovery volume by pulse width.