Heating unit for thermal treatment of concrete

 

(57) Abstract:

Heating unit for thermal treatment of concrete includes a vertical outer and inner surface of the insulating casing, the upper ceiling box and the guide ribs and the heaters. Feature: heating unit equipped with a rotary air heater mounted on the canopy, vertical and horizontal screens, mounted respectively on the box and the guide ribs. 5 Il.

The invention relates to a device for heat treatment of concrete and can be used in construction during the construction of monolithic construction projects.

Currently, monolithic housing starts becoming more widely implemented in the construction industry.

There are several ways to heat treatment of concrete, designed to give it the necessary strength. One of them keeping the concrete by means of a thermos, the essence of which consists in the use of heat supplied to the concrete prior to its installation in the casing and the heat released by the cement during curing concrete (guide for the production of concrete work in th method is its poor suitability for winter concreting at low ambient temperatures, as announced and released heat is not enough to cover the heat losses of the formwork. As a result of violations of the technological mode of hardening his final strength is significantly reduced.

This disadvantage is eliminated in a variety of ways of heating the concrete in the mold during its hardening. One such method is the heating up of the concrete. When heating up electric current is passed through the concrete emitted during this heat is used for heating. The voltage supplied by the steel electrodes and rods installed in the thickness of the concrete or strip electrodes placed between the concrete and neocuproine formwork (usually made of wooden boards). (Guide for the production of concrete work in winter conditions, in areas of the Far East, Siberia and the Far North. M stroiizdat, 1982, S. 95). This method is unsuitable when the monolithic construction, when the whole casing is made of metal and through the volume of concrete are metal rods that connect the elements of the formwork, due to the complexity of compliance with electrical safety and trouble-free operation of electrical equipment.

In monolithic domasco warmth through the dividing wall formwork in the surface layer of concrete from the heaters, installed between the outer surface of the casing and thermal insulation. The heat in the concrete is distributed due to the heat. The disadvantage of this method is the danger of local overheating and critical temperature deformations due to the inability to maintain a uniform supply of heat to the concrete, significant design complexity casing at high velocity high temperature (>7aboutWith/h). (Guide for the production of concrete work in winter conditions, the regions of the Far East, Siberia and the Far North. M stroiizdat, 1982, S. 139).

Closest to the technical essence and the achieved effect in the present invention is a heating casing, the outer surfaces of which are heated by the heaters, and the inner surface of the air heated in the heater and circulating by natural convection in the volume bounded by the inner surfaces of the casing (guide for the production of concrete work in winter conditions, the regions of the Far East, Siberia and the Far North. M stroiizdat, 1982, S. 130).

The invention is directed to improving the quality of monolithic structures and reduce the time the operator of the heat is used recirculation heating unit, and to compensate for heat losses to the environment of the heated structure is applied heating formwork.

The difference from the prototype is that the installation for thermal treatment of concrete provided with a rotary heater, and on the ribs of the inner casing are screens. Therefore, the proposed solution meets the criterion of "novelty."

In Fig. 1 shows a heating unit for thermal treatment of concrete, side view; Fig. 2 section b-b of Fig.1; Fig. 3 section a-a in Fig.2, the seal design; Fig. 4 the node I in Fig.2, the angular design of the seal of Fig. 5 site II in Fig.2, the outer shield casing.

Heating unit for thermal treatment of concrete contains 1 internal, 2 external surface of the insulating casing and the upper ceiling of 3. On the surface casing is installed vertical box-shaped ribs formed by channel 4. In the space between the box-shaped ribs on the external surfaces of the casing 2 laid the tape heaters 5 and heat-insulating mineral wool mats 6. The space between the box-shaped ribs of the inner surfaces of the casing separated from the rest of the inside is tough frame structure, formed by the channel bars 10 and insulated mineral wool mats. On the frame overlap fasten the motor 11 connected to the rotor aerodynamic heating 12, the guide ribs 13, louvred grille 14 and the top of the screen 15.

Overlap 3, the top of the screen 15 and the guide ribs 13 form a horizontal cavity 16. Between 1 internal and 2 external surfaces of the casing is filled concrete 17.

Heating unit for thermal treatment of concrete works in the following way. The air pumped by the rotor aerodynamic heating 12, moves in a horizontal cavity 16, is rotated 90aboutand falls into the vertical air channels 9 of the casing, where, moving from top to bottom, cooled, transferring heat through the surface of the inner casing 1 concrete 17. After the air channel 9, the air expands and is directed through the internal volume of the installation of 7, the louvered grill 14 to the rotor 12. The rotor 12 also serves as a compressor and a generator of heat.

The main heat necessary for the heat treatment of concrete occurs when the work of rotary air heater due to the effect of heat losses generated during rabona tract. Band heaters 5 are used for compensation of heat loss of the heated concrete in the environment.

Used as the heat generator rotor aerodynamic heating allows the efficient regulation of heat dissipation by changing the number of revolutions of the motor, and the throttle to keep air circulating louvered grill.

The advantages of the proposed heating unit are intense and uniform heating of the concrete, the exact observance of the specified mode of heat treatment of concrete with effective and simple adjustment of thermal capacity of the rotary heater.

HEATING unit FOR thermal TREATMENT of CONCRETE containing heat insulating casing with a vertical external and internal surfaces, which strengthened accordingly, the heaters and the box-shaped ribs, the upper cover, and the guide ribs, characterized in that the installation is equipped with a rotary air heater installed on brahnam overlapping, vertical and horizontal screens, mounted respectively on the box and the guide ribs.

 

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