PXK series positive pressure explosion-proof distribution cabinet explosion-proof analysis room

Positive pressure ventilation explosion proof analysis room
1 scope
Positive pressure ventilation and explosion - proof analysis cabin products. It is used in the production of oil refining, chemical industry, metallurgy, pharmaceutical industry and light industry, etc., to provide safe installation space and protection for various on-line gas analyzers and on-line water quality analyzers in various processes.
2 cabin size
Manufacture according to customer needs. Generally, it is expressed as the outer dimension of the cabin: 3000mm (length) ×3000mm (width) ×3000mm (height).
The cabin is a non-standard product, and its size can be determined according to the number of analyzers, types, system complexity and operation and maintenance space. Limited by long-distance transport conditions, its overall dimensions are generally as follows:
Length: outdoor main body 2.5-6.5m (considering the standard steel size, hoisting and transportation structural strength, the length of a single analysis hut should not exceed 6.5m. If the length is 6.5m, a combined structure can be adopted, which can be made separately and combined into one after being transported to the site, or two analysis cabins can be used).
Width: outdoor main body 2.5m, the widest should not exceed 3.0m (limited by road transport width, width should not exceed 3.0m).
Height: outdoor main body 2.5-3.0m (subject to the height limit when passing through the overpass and tunnel), indoor net height 2.2-2.8m.
3. Mechanical structure and material requirements of the cabin
The frame, base, and roof
The framework, base and roof of the analysis cabin are metal members welded with section steel, which should have sufficient strength and rigidity to ensure that the analysis cabin will not deform under load, lifting, translation and transportation.
The advocate frame of base appropriate USES 12# ~ 20# channel steel, floor keel lower part USES 2 10# ~ 12# channel steel or I beam to serve as prop beam, advocate frame, floor keel and prop beam all should be welded join, assure the floor when maintain personnel to walk indoors not tremor.
Roof frame and main beam should adopt 10# ~ 12# channel steel, and 8# ~ 10# channel steel in the width direction as the main beam and roof keel support, should be welded together to prevent distortion. The roof should have A certain inclination, slope of at least 4%, can be A type A or A slope structure, do not allow the use of flat roof to prevent rainwater accumulation.
The interior and exterior walls and interior and exterior roof panels
The outer wall panel should be made of 1.5mm# ~ 2.0mm steel plate, and can be formed by combination structure of flight-type plate. If the welding process can be guaranteed, the outer wall can also be formed by welding structure of ribbed galvanized sheet. It is advisable to use stainless steel board (304SS, stainless steel wire-drawing laminating board is recommended) for exterior wall board with split-board structure using xx, or use galvanized steel plate. When using galvanized steel plate, the surface must be sprayed with white or international gray.
The inner wall panel and ceiling should be made of 1.5mm# ~ 2.0mm steel plate. The material of the second engineering electrical cabin should be galvanized steel plate or cold-rolled steel plate. Stainless steel plate can also be used according to user requirements. When using galvanized steel or cold-rolled plate, the surface must be painted with white varnish for the ceiling and white matt paint for the inner wall.
The roof panels shall be designed to provide effective rain protection, which may be constructed with a combination of snap structures or by plane welding. The material is made of 1.5mm# ~ 2.0mm stainless steel plate, which can ensure the durable corrosion resistance of the roof surface, and the roof weight capacity ≥250kg/m2 (weight of two persons) without permanent deformation.
(3) insulation
The insulation layer thickness is generally 70 ~ 75mm (3in), and should be increased to 80 ~ 85mm in cold or hot areas.
(4) the floor
The floor should be anti-skid metal plate, appropriate use 4 ~ 6mm steel plate production, material according to user requirements can use decorative stainless steel plate, also can use decorative galvanized steel plate or hot rolled steel plate, using galvanized steel plate or hot rolled plate must be surface spray treatment, spray color is generally gray, when necessary can add a layer of anti-static plastic plate.
Inside the cabin, avoid dead corners and grooves that may cause gas accumulation. Suitable manual or automatic vent holes should be provided at the height of the cabin to prevent gas accumulation. Sample preparation units, carrier cylinders, standard cylinders, and laboratory sampling points for manual analysis shall be located outside the cabin.
4 power distribution of huts
Analysis of the cabin lighting, fan, air conditioning, maintenance socket and other public equipment by industrial power supply. The analyzer system, installation test alarm and interlocking system are powered by UPS power.
Analyze the security detection and alarm system of the cabin
Combustible gas detector adopts the product with integrated structure of detection probe and signal transmitter, and with local display head and contact signal output.
Toxic gas detector when the sample or the surrounding gas contains toxic group, the toxic gas detection alarm must be set, the same as combustible gas detection alarm.
Different amounts of differential pressure transmitters are installed according to the internal volume of the cabin to detect and analyze the positive pressure in the cabin. Differential pressure transmitter to PLC controller provides the signal for the principle of three choose two, namely PLC cabin through the analysis of the pressure signal of the power cut off control of explosion-proof electrical equipment, must be the cabin if you have three micro differential pressure transmitter, there are more than 2 below the value of the security rules are given at the same time, PLC was given to cut off the analysis command cabin of explosion-proof electrical equipment power supply.
Sound and light alarm device refers to siren and light (rotating flashing type), installed outside the cabin.
The explosion-proof alarm control box is equipped with a small programmable controller (PLC or processor), with various indicator lights and buttons on the panel. Its function is to control the safety detection and alarm system to realize local alarm (indoor and outdoor cabin), control room alarm and interlocking functions (such as starting the fan and turning on the instrument to change and exhaust).