Case sharing of some construction procedures of an aluminum-magnesium-manganese aluminum plate project

A, aluminum magnesium manganese aluminum plate engineering construction process:

Purlin installation → installation of the bottom roof board → installation of steam barrier, Z-shaped purlin, laying of glass wool and waterproof and ventilation layer → installation of upper insulation board.

Second, the construction technology:

1, purlin installation:

Main and secondary sandalwood structures are selected. The primary main purlin is connected with the steel beam with bolts by setting sandalwood supporting plates on the H-beam, and the connection between the secondary purlin and the main purlin is directly fixed with self-tapping screws. During construction, the installation work shall be carried out from the lower part of the roof to the center of the house.

(1) Before roof construction, measure the deviation of steel structure, process the primary and secondary purlin brackets according to the measured data, and confirm the position and number of the purlin brackets according to the length of the secondary purlin.

(2) According to the measured position, install purlin brackets with different heights on the No.1 passenger seat. After the purlin bracket is in place, it shall be welded with the main purlin, and the height of the welding leg shall not be less than 6mm, and girth welding shall be carried out. After the welding slag is cleaned, the anti-corrosion process shall be carried out.

(3) After welding the purlin bracket, re-measure the elevation on the purlin bracket. Purlin shall be installed at known elevation. Fine adjustment of elliptical hole, welding and positioning of steel gasket.

(4) The transportation and stacking of sandalwood strips should be standardized, and measures should be taken to prevent deformation. The seriously deformed purlins should be corrected in time.

(5) Installation position of sandalwood strips. Elevation, radian and deflection spacing shall be strictly measured and controlled to meet the installation accuracy requirements of Al-Mg-Mn-Al plate.

2, the roof bottom plate installation:

(1) The plates shall be supported reasonably after being transported to the site, and the stacking height shall be appropriate, so as to avoid the deformation of the plates, and waterproof and drainage measures shall be taken at the site.

(2) When the board is lifted vertically, a specific lifting frame is provided. Lift the whole bundle of goods with a crane. Wear-resistant pads should be set at the contact place between plates and hanging ropes, and plates of various specifications should be reasonably hung on purlins and fixed with white brown ropes. When the profiled Al-Mg-Mn plate is hoisted to the roof for storage. The overlapping edge faces the roof edge. Avoid rotating Al-Mg-Mn plate and rotating Al-Mg-Mn plate, so that the installation work can be carried out smoothly.

(3) When fixing the initial Al-Mg-Mn plate, keep its position vertical and square, and accurately put it on the installed purlin.

(4) Laying Al-Mg-Mn plates in an orderly manner according to the deepening typesetting diagram, reserving the flat-fell seam of the two plates, and fixing them after the two plates are put in place.

(5) When installing the Al-Mg-Mn-Al plate at the bottom of the roof, self-tapping screws are used for direct connection and fixation.

Technology sharing of aluminum magnesium manganese aluminum coating production process

A, coating thickness measurement system:

In order to accurately control the thickness of Al-Mg-Mn-Al coating, an isotope thickness gauge is generally equipped, and the thickness is controlled in closed loop together with the coating roller. When three isotope thickness gauges are configured, one is located in front of the coating machine to measure the thickness of wet film or the thickness of Al-Mg-Mn plate before coating; Two sets are located behind the curing furnace to measure the dry film thickness of the upper and lower surfaces. There are two measuring methods, namely, centerline measurement (the thickness gauge head is positioned at a preset position) and continuous scanning (the thickness gauge head moves continuously along the width direction of the aluminum-magnesium-manganese plate), which can be selected according to needs and is flexible. The sampling time is short (20ms, the comprehensive time is 100ms), and the closed-loop control accuracy of coating thickness reaches 0.7%.

Second, the curing furnace heating system:

Part of the air discharged from the coating chamber passes through an auxiliary heat exchanger to exchange heat with the high-temperature flue gas discharged from the afterburner; Another part of the air discharged from the coating room directly enters the curing furnace through the conduit as supplementary fresh cold air. The proportion of hot air and cold air is controlled by the hot air and cold air flow regulating plates (which can be rotated by 90 degrees by using electro-mechanical actuators) arranged in each zone, and the temperature of each zone of the aluminum magnesium manganese aluminum plate is accurately controlled by mixing the preheated air with balanced flow and supplementing fresh cold air. At the same time, the thermocouple arranged between each circulating fan and the nozzle outlet of the furnace provides the required feedback information for the temperature control of the furnace zone.

The solvent volatilized in the coating chamber is also introduced into the afterburner from the curing furnace, and can be used as waste heat after incineration, which not only improves the thermal efficiency of the curing furnace, but also meets the requirements of environmental protection. The system has the advantages of reducing dust accumulation in the furnace and high efficiency; There is no burner or ignition source for direct combustion in the furnace area, which solves the phenomenon of direct contact between combustion particles and Al-Mg-Mn plate as a whole and improves the quality of surface coating of Al-Mg-Mn plate. The curing furnace environment is clean.

Three, hot water production system:

The waste heat from the flue gas discharged from the afterburner system is used to provide hot water for the operation of the aluminum-magnesium-manganese-aluminum plate production line, and its heat is recovered before the flue gas discharged from the afterburner system is released into the air. The heat exchanger is an air/water heat exchanger system, including an exhaust fan control regulator, an actuator, a control sensor and a standby steam/water heat exchanger as a supplement. The temperature of hot water after heat exchange can reach 95℃ (75 ~ 85℃ in general), and the exhaust temperature of flue gas is about 300℃.

Link-B2B is a professional supplier listing service platform which will provide high quality and trustworthy supplier list to international buyers. If you are looking for aluminum magnesium manganese aluminum plate  suppliers, feel free to visit Link-B2B.com and send a request.