CN2591619Y

CN2591619Y - Optical ionization detector

Info

Publication number: CN2591619Y
Application number: CN 02280230
Authority: CN
Inventors: 陈一之
Original assignee: RAE Systems Shanghai Inc
Current assignee: RAE Systems Shanghai Inc
Priority date: 2002-12-04
Filing date: 2002-12-04
Publication date: 2003-12-10
Anticipated expiration: 2012-12-04

Abstract

The utility model relates to an optical ionization detector comprising an air inlet connector, a lamp case, an upper cover box and a lower cover box. The screw side of the air inlet connector is connected with a cylindrical case seat of the lamp case through a PID sensor. The other end of the lamp case passes through a hole which is together formed by one side of the upper cover box and one side of the lower cover box. The exterior of one end of the cylindrical cavity of the lamp case is sheathed with a C-shaped flaky printed circuit board. The outer surface of the cover box is provided with an LCD for displaying measuring results. The display of the LCD is controlled by a circuit on the printed circuit board. Because of the structure, the detector has the advantages of fast reaction speed, high measuring precision, easy operation and stable performance.

Description

Photoionization detect instrument

Technical field

The utility model relates to detector, refers in particular to a kind of photoionization detect instrument.

Background technology

In existing technology, the detection of gas concentration mainly is to rely on mimic channel or digital circuit, its operation is not very convenient, measurement index shows not directly perceived, volume ratio is bigger, be not easy to carry, generally need connect fixed power source, circuit itself can not be worked under rugged environment, as: high temperature, high pressure, and such detector is slower to the reaction velocity that tested gas changes, and can not reflect that the instantaneous concentration of gas changes, the precision of such detector can reduce after long-time the use, causes measurement inaccurate.

Summary of the invention

It is rapid that fundamental purpose of the present utility model provides a kind of reaction velocity, measuring accuracy height, the photoionization detect instrument of easy and simple to handle and stable performance.

To achieve these goals, the technical solution of the utility model is: a kind of photoionization detect instrument, be characterized in that this detector comprises inlet suction port, and lamp housing, upper and lower hamper, wherein:

Inlet suction port, polyfluortetraethylene pipe is contained in system, adapter is surveyed in sensor cover and import, this polyfluortetraethylene pipe is with a pipe box with thermal shrinkage function outward, be provided with long spring between the two, one end of polyfluortetraethylene pipe stretches out from pipe box, its other end and pipe box are joined by air output pipe wrench and sensor cover center through hole one side, one end of import detection adapter inserts the opposite side of this sensor cover center through hole, the other end of this adapter is arranged with O type circle, and a size is fixed thereon by the filtrator screw with the metallic filter of its coupling;

Lamp housing, the centre that one size and its coupling are installed in the cylindrical cavity of this lamp housing has the tubular flexible circuit of spring, one end outer cover of this lamp housing cylindrical cavity is provided with the printed circuit board (PCB) of a C matrix shape, and the projection of the corresponding side of this printed circuit board (PCB) and flexible circuit electrically contacts, and a high-pressure lamp is placed in the cylindrical cavity of this lamp housing;

Upper and lower hamper, be provided with an aspiration pump in the system, the exhaust tube of this aspiration pump is connected with the end that this lamp housing is arranged with printed circuit board (PCB), its escape pipe then is inserted in down in the gas air outlet adapter of hamper one side, be placed with two batteries in this upper and lower hamper, one links to each other with motor on this aspiration pump, and another piece then links to each other with printed circuit board (PCB) on this lamp housing;

One side of this inlet suction port screw is connected with the cylindrical shape shell block end of this lamp housing by a PID sensor, and the other end of this lamp housing then passes the common hole of forming of this upper and lower hamper one side.

Should go up a LCDs that is used to show measurement result is housed on the outside surface of hamper, the demonstration of this display screen is controlled by the circuit on this printed circuit board (PCB).

Description of drawings

Illustrate in greater detail the utility model by means of accompanying drawing below, wherein:

Fig. 1 is the stereographic map of the utility model photoion detector.

Fig. 2 is the inner structure synoptic diagram of the utility model photoion detector.

Fig. 3 is the exploded view of inlet suction port in the utility model.

Fig. 4 is the exploded view of lamp housing in the utility model.

Fig. 5 is an inlet suction port in the utility model, the connection layout of PID sensor and lamp housing.

Embodiment

See also Fig. 1 to shown in Figure 5, the utility model is a kind of photoionization detect instrument, and this detector comprises inlet suction port 1, lamp housing 2, and upper and

lower hamper

3 and 4, wherein:

Inlet suction port 1, polyfluortetraethylene pipe 11 is contained in system, adapter 13 is surveyed in sensor cover 12 and import, these polyfluortetraethylene pipe 11 outer pipe boxes 14 with thermal shrinkage function that are with, be provided with long spring 15 between the two, one end of polyfluortetraethylene pipe 11 stretches out from pipe box 14, its other end and pipe box 14 are joined with sensor cover 12 center through hole one side by air output pipe wrench 16, one end of import detection adapter 13 inserts the opposite side of these sensor cover 12 center through hole, the metallic filter 18 that the other end of this adapter 13 is arranged with O type circle 17, one sizes and its coupling is fixed thereon by filtrator screw 19;

Lamp housing 2, the centre that one size and its coupling are installed in the cylindrical cavity 21 of this lamp housing 2 has the tubular flexible circuit 23 of spring 22, one end outer cover of this lamp housing cylindrical cavity 21 is provided with the printed circuit board (PCB) 24 of a C matrix shape, and this printed circuit board (PCB) 24 electrically contacts with the projection of flexible circuit 23 corresponding sides, and a high-pressure lamp 25 is placed in the cylindrical cavity 21 of this lamp housing 2;

Upper and

lower hamper

3 and 4, be provided with an aspiration pump 41 in the system, the exhaust tube 411 of this aspiration pump 41 is connected with the end that this lamp housing 2 is arranged with printed circuit board (PCB) 24,412 of its escape pipes are inserted in down in the gas air outlet adapter 42 of hamper 4 one sides, be placed with two

batteries

43,44 in this upper and

lower hamper

3,4, one links to each other with motor on this aspiration pump 41, and another piece then links to each other with printed circuit board (PCB) 24 on this lamp housing 2;

One side of this inlet suction port 1 screw 19 is connected with the cylindrical shape shell block end 25 of this lamp housing 2 by a PID sensor 5, and the other end of this lamp housing 2 then passes the common hole of forming 45 of these upper and

lower hamper

3,4 one sides.

Should go up a LCDs 31 that is used to show measurement result is housed on the outside surface of hamper 3, the demonstration of this display screen 31 is controlled by the circuit on this printed circuit board (PCB) 24.

The principle of work of this photoionization detect instrument is: gas passes through aspiration pump 41 in this instrument of inlet suction port 1 suction, activate the organic gas layering by the PID sensor 5 that high-pressure lamp 25 direct projections are arranged, produce different electronic interface, convert electronic pulse signal to, through printed circuit board (PCB) 24 samplings, amplify the back and show gas concentration by LCDs 31.

Range of application of the present utility model can be used for organic gas and vapor concentration detects, also can be used for the safety and sanitation testing of all kinds of uses, production, storage, all kinds of organic compound of transportation enterprise, can also be used for simultaneously the every field such as emergent accident, industrial hygiene consulting, public security checking, chemical defence of environmental protection industry (epi).

Claims

1, a kind of photoionization detect instrument is characterized in that, this detector comprises inlet suction port, lamp housing, and upper and lower hamper, wherein:

2. photoionization detect instrument according to claim 1 is characterized in that, a LCDs that is used to show measurement result is housed on the outside surface of hamper on this, and the demonstration of this display screen is controlled by the circuit on this printed circuit board (PCB).