CN2283853Y

CN2283853Y - Electrolytic analytical instrument

Info

Publication number: CN2283853Y
Application number: CN 97207015
Authority: CN
Inventors: 庄东宁
Original assignee: ZHENJIANG AODIKANG MEDICAL INSTRUMENT CO Ltd
Current assignee: ZHENJIANG AODIKANG MEDICAL INSTRUMENT CO Ltd
Priority date: 1997-01-17
Filing date: 1997-01-17
Publication date: 1998-06-10
Anticipated expiration: 2007-01-17

Abstract

The utility model relates to a medical detecting instrument, which comprises a pump, a sensor and a pipeline. The inlet of the sensor is connected with a tee; one opening of the tee is connected with a standard liquid tank pipeline through a valve and the pump; the other opening of the tee is connected with the other standard liquid tank pipeline through a sample injector, a liquid supply port, a valve and the pump. Compared with the prior art, the utility model has the advantages of low cross contamination, simple structure and low cost.

Description

Blomelicalbloodgasandelectrolrteanalyzers

The utility model relates to a kind of medical detecting Instrument.

Blomelicalbloodgasandelectrolrteanalyzers adopts the ion concentration in the ion transducer mensuration sample.Clinically, sample is generally blood and urine, but measured ion concentration is generally potassium, sodium, chlorine, calcium, lithium, PH etc., for the output level to ion transducer is demarcated, need two kinds of standard electrolytic liquid are sent in the sensor, measure its potential value, obtain the slope of sensor, again sample is sent in the sensor, measured its potential value, thereby calculate the ion concentration of sample.

Because the electrolyte sensor need regularly be calibrated, need fast measuring in actual the use, so blomelicalbloodgasandelectrolrteanalyzers is wanted to distribute two kinds of titers and a kind of sample to enter sensor fast, and mutual pollution is the smaller the better, require the reliability of distribution system high more good more simultaneously, the distribution system that uses is that a rotary four-way distribution valve distributes two kinds of titers and sample at present, its principle is photoelectricity positioning disk of a step motor drive and a two-way valve core, on the valve body outside the spool 4 delivery outlets are arranged, one of them apical pore and sensor join, three side openings and spool join, the junction seals with O-ring seal, an optoelectronic switch is housed on valve body, a light tank is arranged on the photoelectricity positioning disk, the photoelectricity positioning disk is by being subjected to the corresponding half-twist of micro-processor controlled step motor drive or 180 ° or 270 °, so that the aperture on the spool communicates respectively in an orderly manner with delivery outlet on the valve body, thereby titer or sample can be transferred in the sensor under the effect of pump through valve body and spool.

Mainly there is following shortcoming in above-mentioned instrument:

(1) because there is moving component in the inside of valve, difficult sealing to be to guarantee that inner dead space is many, easy cleaning not, and the cross pollution between three kinds of liquid is big, influences measuring accuracy.

(2) parts are many, the complicated and obstruction easily of assembling.Poor reliability.

(3) adopt stepper motor, optoelectronic switch and other precision parts, so the cost height.

The purpose of this utility model just is to overcome above-mentioned the deficiencies in the prior art part, and the blomelicalbloodgasandelectrolrteanalyzers that a kind of cross pollution is few, simple in structure, cost is low is provided.

The purpose of this utility model is achieved in that a kind of blomelicalbloodgasandelectrolrteanalyzers, comprise pump, sensor, pipeline, said sensor import connects threeway, one port of said threeway connects with standard flow container pipeline by a valve and pump, and another port of said threeway connects with another standard flow container pipeline by an injector, a supply opening, a valve and pump.

Said injector comprises a support, sample introduction body, sample introduction needle, spacer pin, and said sample introduction body is by a pin and support hinge connection, and sample introduction needle is fixedly mounted on the sample introduction body.

Said supply opening is the groove shape, and top has a breach.

The utility model is described in further detail below in conjunction with accompanying drawing.

Fig. 1 is the blomelicalbloodgasandelectrolrteanalyzers structure diagram;

Fig. 2 is injector structure figure;

Fig. 3 is the inlet sectional view;

Fig. 4 be among Fig. 3 A to partial view.

The utility model blomelicalbloodgasandelectrolrteanalyzers comprises that pump, sensor 2, pipeline, sensor import connect threeway 3, one port of threeway connects with standard flow container 5 pipelines by valve 4 and pump 1, another port of threeway connects with another standard flow container 10 pipelines by injector 6, supply opening 7, valve 8 and pump 9, and the sensor outlet connects with waste liquid tank 12 pipelines by pump 11.Pump 1,9,11 is a pump integrating, by same driven by motor.Injector comprises support 13, sample introduction body 14, sample introduction needle 15, spacer pin 16, and the sample introduction body is by a pin 17 and support hinge connection, and sample introduction needle is fixedly mounted on the sample introduction body.Supply opening is the groove shape, and top has a breach 18, and supply opening can be changeed into, be produced to sample introduction needle by this breach.

The utility model principle of work is as follows:

1, when needs is supplied with the A titer.This moment, valve 4 cut out, valve 8 is opened, it is that the sample introduction body leans against on the lower limit pin that sample introduction needle is in the normal position, and the sample introduction needle of this moment is at supply opening groove mouth, and pump rotates, the A titer is through valve 8, enter supply opening by the supply opening pipe adapter, suck threeway by sample introduction needle then, send into sensor by threeway after, pump stall, shut-off valve 8 can carry out the A mark and demarcate.

Because valve 4 closes valve, B titer in from valve 4 to the pipeline the threeway does not have mobile, the B titer of the crossing in threeway, partly flow away at the A titer initial stage of flowing with the A titer, major part is stayed the interior B titer of pipe owing to flowing of A titer makes it to form negative pressure, make the B titer in threeway, not mix and flow sensor, thereby avoided of the pollution of B titer the A titer with the A titer.

2, when needs are supplied with the B titer, valve 8 closes valves at this moment, and valve 4 is opened, and sample introduction needle still is in the normal position, and pump rotates, and the B titer is in valve 4 input threeways, and again by in the threeway input pickup, pump stall and shut-off valve 4 can carry out the demarcation of B mark to end.

Because valve 8 cuts out, A mark titer in from valve 8 to supply opening does not have mobile, and the A titer in from the sample introduction needle to the threeway is sucked away owing to the effect of pump, the B titer that enters threeway from valve 4 then constantly enters threeway and input pickup, owing to the rotation that lags behind pump of opening of valve 4, thereby the A titer in sample introduction needle and the pipe can not pollute the B titer.

3, when needs are measured sample, valve 8, valve 4 are all closed, pump rotates, even opening injection port sample introduction body leans against on the upper arresting pin, at this moment, pump will be inhaled empty sensor and pipeline, then sample be sucked by sample introduction needle, through the pump stall so far of threeway input pickup, close injection port and can carry out sample mensuration.

B titer in the threeway in like manner can not pollute sample.

Core of the present utility model is threeway and pipe system thereof, though there is the B mark to exist in the threeway, does not pollute A mark and sample, that is to say that after valve 8 cut out, the B titer in the threeway can't enter sensor, thereby has realized following advantage:

(1) whole measurement pipeline does not have the dead angle, does not have the transhipment parts, is easy to clean, and sealing is simple, thereby has realized no cross pollution.

(2) simple in structure, be easy to processing, be easy to assembling, and the reliability height, the life-span is long.

(3) replace stepper motor, optoelectronic switch by universaling electromagnetic valve, threeway, cost has reduction greatly.

Claims

1, a kind of blomelicalbloodgasandelectrolrteanalyzers, comprise pump, sensor, pipeline, it is characterized in that: said sensor import connects threeway, one port of said threeway connects with standard flow container pipeline by a valve and pump, and another port of said threeway connects with another standard flow container pipeline by an injector, a supply opening, a valve and pump.

2, blomelicalbloodgasandelectrolrteanalyzers according to claim 1 is characterized in that: said injector comprises a support, sample introduction body, sample introduction needle, spacer pin, and said sample introduction body is by a pin and support hinge connection, and sample introduction needle is fixedly mounted on the sample introduction body.

3, blomelicalbloodgasandelectrolrteanalyzers according to claim 1 is characterized in that: said supply opening is the groove shape, and top has a breach.