CN201322653Y

CN201322653Y - Explosion-proof flame detector

Info

Publication number: CN201322653Y
Application number: CNU2008202378081U
Authority: CN
Inventors: 周嵩; 凡灼华
Original assignee: CHANGZHOU YVHUA ELECTRIC EQUIPMENT MANUFACTURING Co Ltd
Current assignee: Cooper Yuhua Changzhou Electric Equipment Manufacturing Co Ltd
Priority date: 2008-12-18
Filing date: 2008-12-18
Publication date: 2009-10-07
Anticipated expiration: 2018-12-18

Abstract

The utility model discloses an explosion-proof flame detector which consists of case body components, upper lid components and an infrared flame detector which is arranged in the tank body; the case body components are composed of a base board, the case body and a flange ring; the upper end of the case body is welded with the flange ring, and the lower end thereof is welded with the base board; a cable leading-out device is arranged on the case body and consists of a nut seat, a nut and a rubber ring; the nut seat is fixedly connected with the case body; the rubber ring is positioned in the nut seat; the nut is connected with the nut seat in a threaded manner and the front end of the nut presses against the rubber ring; the upper lid components consist of the upper lid, transparent glass and a glass pressing ring; the transparent glass presses tightly on the inside of the upper lid by the glass pressing ring; the glass pressing ring is fixedly connected with the upper lid; the upper lid is fixedly connected with the flange ring at the upper end of the case body and the surface on which the upper lid is matched with the flange ring is an explosion-proof surface; a sealing ring is arranged between the upper lid and the flange ring. The explosion-proof flame detector has the functions of dust explosion prevention and gas explosion prevention and can be directly arranged on special industrial sites with explosion danger.

Description

Explosion-proof flame detector

Technical field

The utility model relates to a kind of flame detector with explosion-resistance characteristic, be used to survey flammable liquid or the smokeless condition of a fire of gas generation and the burning of carbonaceous material, be applicable to that large scale industry warehouse, argon arc welding industry, generating plant, transformer station, printing house, firewood store large space places such as factory, chemical plant, refinery, vestibular market.

Background technology

Places such as present chemical plant, refinery, transformer station, industrial stores, may there be inflammable gas or dust, because industrial control equipment is numerous, the operating mode complexity, these important events must be carried out strict monitoring to unexpected abnormality situations such as naked light, flue dust, electric short circuit, blasts.Present all kinds of smoke detectors and the naked light detector that exists on the market; mostly be civilian level greatly; shell generally adopts conventional materials such as engineering plastics, cast aluminium; in above-mentioned industrial environment; lack shock resistance to a certain degree, the safeguard measure dynamics of himself is not enough, in the face of on-the-spot multiple unexpected abnormality; the reliability of detector reduces greatly, thereby directly has influence on effective running of the whole mechanism of deploying to ensure effective monitoring and control of illegal activities.

Summary of the invention

The purpose of this utility model provides a kind of have dust explosion protection, the explosion-proof explosion-proof flame detector of gas, can be directly installed on the extraordinary industry spot with explosion risk.

The technical scheme that realizes above-mentioned purpose is: a kind of explosion-proof flame detector, by box assembly, cover assembly and the infrared flame detector that is installed in the casing are formed, box assembly is by base plate, casing and flange circle are formed, the upper end welding of flange circle and casing, the lower end welding of base plate and casing, the cable ejector is installed on the casing, the cable ejector is by nut seat, nut and rubber ring are formed, nut seat is fixedlyed connected with casing, rubber ring is positioned at nut seat, nut is threaded with nut seat, and the front end of nut props up rubber ring, cover assembly is by loam cake, clear glass and glass trim ring are formed, clear glass is pressed on the loam cake inboard by the glass trim ring, and the glass trim ring is fixedlyed connected with loam cake, and loam cake is fixedlyed connected with the flange circle of casing upper end, and the face that loam cake and flange circle mutually combine is explosion-proof, and is provided with O-ring seal between loam cake and flange circle.

Further, the clear glass that is adopted is a transparent toughened glass.

After adopting technique scheme, the face that loam cake and flange circle mutually combine is explosion-proof, and transparent toughened glass has been installed at the loam cake center, has improved the explosion-proof and shock resistance of casing greatly.Simultaneously, the cable ejector adopts gland nut formula device, makes cable fully compress non-loosening, simultaneously, can prevent that dust, steam etc. from entering in the casing, makes the function that the utlity model has dust explosion protection and discharge water.

Description of drawings

Fig. 1 is a sectional structure synoptic diagram of the present utility model;

Fig. 2 is the schematic top plan view of Fig. 1.

Embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail.

As Fig. 1, shown in 2, a kind of explosion-proof flame detector, by box assembly, cover assembly and the infrared flame detector 3 that is installed in the casing are formed, box assembly is by base plate 1.2, casing 1.4 and flange circle 1.3 are formed, flange circle 1.3 welds with the upper end of casing 1.4, base plate 1.2 welds with the lower end of casing 1.4, the cable ejector is installed on the casing 1.4, the cable ejector is by nut seat 8, nut 11 and rubber ring 9 are formed, nut seat 8 is fixedlyed connected with casing 1.4, rubber ring 9 is positioned at nut seat 8, nut 11 is threaded with nut seat 8, and the front end of nut 11 props up rubber ring 9, cover assembly is by loam cake 13.5, tempering clear glass 13.3 and glass trim ring 13.6 are formed, tempering clear glass 13.3 is pressed on loam cake 13.5 inboards by glass trim ring 13.6, and be lined with glass isolator 13.1 between transparent toughened glass 13.3 and the glass trim ring 13.6, be lined with metallic cover pad 13.2 between transparent toughened glass 13.3 and the loam cake 13.5, glass trim ring 13.6 is fixedlyed connected with loam cake 13.5 by screw 14, loam cake 13.5 is fixedlyed connected by screw 12 with the flange circle 1.3 of casing 1.4 upper ends, and loam cake 13.5 is explosion-proof with the face that flange circle 1.3 mutually combines, and between loam cake 13.5 and flange circle 1.3, be provided with " O " RunddichtringO 13.4, reach waterproof, prevent dust and explosion-proof purpose.

As shown in Figure 1, stifled core 10 is housed on the cable ejector, the stifled core of packing into when no cable is drawn prevents that dust, steam etc. from entering in the casing 1.4.

As shown in Figure 1, base plate 1.2 bottoms are welded with case pin 1.1.Casing 1.4 inside bottom are provided with

liner plate

2, and 4 sunk screws 5 of liner plate 2 usefulness are fixed on the base plate 1.2, and infrared flame detector 3 is fixed on the liner plate 2 with screw 4 by the mounting hole on self base.

As shown in Figure 1, earthing screw 15 is housed all inside and outside the casing 1.4, and is provided with ground connection sign 6 inside and outside casing 1.4, ground connection sign 6 is fixedlyed connected with earthing screw 15 by nut 7.

Infrared flame detector 3 is selected Siemens DF11xx series of products for use: WaveRex DF1192 infrared flame detector has three sensors: two sensors are surveyed the light of different wave length (4...4.8 μ m and 5.1...6 μ m); The 3rd sensor is used for the antijamming capability of enhancing to daylight (0.7...1.1 μ m), and its specific assessment algorithm satisfies the severe rugged environment requirement, can be directly connected to the S11 system; DF1101-EX is applied to non-addressing and interactive probing system mutually with the explosion-proof flame detector of DF1151-EX; DF1191 only is with an infrared sensor, can be directly connected to the S11 system.

Claims

1, a kind of explosion-proof flame detector, by box assembly, cover assembly and the infrared flame detector (3) that is installed in the casing are formed, it is characterized in that: box assembly is by base plate (1.2), casing (1.4) and flange circle (1.3) are formed, flange circle (1.3) welds with the upper end of casing (1.4), base plate (1.2) welds with the lower end of casing (1.4), casing is equipped with the cable ejector on (1.4), the cable ejector is by nut seat (8), nut (11) and rubber ring (9) are formed, nut seat (8) is fixedlyed connected with casing (1.4), rubber ring (9) is positioned at nut seat (8), nut (11) is threaded with nut seat (8), and the front end of nut (11) props up rubber ring (9), cover assembly is by loam cake (13.5), clear glass (13.3) and glass trim ring (13.6) are formed, clear glass (13.3) is pressed on loam cake (13.5) inboard by glass trim ring (13.6), glass trim ring (13.6) is fixedlyed connected with loam cake (13.5), loam cake (13.5) is fixedlyed connected with the flange circle (1.3) of casing (1.4) upper end, and loam cake (13.5) is explosion-proof with the face that flange circle (1.3) mutually combines, and is provided with O-ring seal (13.4) between loam cake (13.5) and flange circle (1.3).

2, explosion-proof flame detector according to claim 1 is characterized in that: described clear glass (13.3) is a transparent toughened glass.

3, explosion-proof flame detector according to claim 1 and 2, it is characterized in that: earthing screw (15) all is housed inside and outside the casing (1.4), and inside and outside casing (1.4), being provided with ground connection sign (6), ground connection sign (6) is fixedlyed connected with earthing screw (15).