Apparatus for heat treatment of monolithic reinforced concrete blocks

FIELD: building industry branches, namely apparatuses for heat treatment of constructions of reinforced concrete erected in building site with use of automatic control of heat treatment processes.

SUBSTANCE: apparatus includes concrete form having electric heating units mounted in its boards for convection-irradiation heating of concrete mixture and heating members mounted in bottom of concrete form for convection-irradiation heating; temperature pickups having individual control circuits and connected to inlets of heat regulators. Outlets of heat regulators are connected through switching units having magnetic starters with respective electric heating units. Each control circuit includes at least six temperature pickups placed in monolithic construction and pickup for measuring temperature of environmental air. Said pickups are connected with inlets of respective programmed heat regulator for supplying control signals.

EFFECT: enhanced quality of constructions.

3 cl, 4 dwg

 

The invention relates to the construction, namely, devices for heat treatment erected in conditions of construction sites in two or more stages of a monolithic bridge structures made of reinforced concrete, using automatic control of thermal processes.

Known the closest in technical essence is a device for heat treatment of precast concrete products with the automatic control device process heat treatment (EN N2147987, CL 28 In 11/24, 2000).

The known device is not applicable to a construction site in preparation for concreting long structures of complex geometry, types of bridges, because of the inability to maintain them heat mode training needs in the presence of a specially equipped booth-camera.

The present invention is to improve the quality of the manufacture of structures due to the possibility to create a high uniformity of temperature distribution throughout the volume of the site, regardless of its thermal characteristics, as well as improving the reliability of structures by reducing the risk of cracking temperature of character in areas of the Association built previously and newly constructed area specified monolithic reinforced concrete con is e.g..

This is achieved in that the device for the heat treatment of monolithic concrete structures, mainly bridges, in the conditions of the construction site contains formwork installed in its sides with electric heating elements for convective-radiative heating of the concrete mixture and set in its bottom heating elements for convection-contact heating with independent control channels of the sensors connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements, with each control channel includes at least six installed in the monolithic design of temperature sensors and the temperature sensor ambient air connected to the inputs of the corresponding programmable controller for supplying control signals. Each channel regulation may be made in the form of at least three independent sub-regulation temperature, respectively, in the middle, top, or right, or lower left points of the control area, and to provide visual inspection it is equipped with a monitor and/or printer to display temperature values.

The invention is illustrated by drawings, where:

on f is 1 - General view of the design, immured in the first stage;

figure 2 - Approximate placement of temperature sensors;

figure 3 - Indicative breakdown prepared designs for independent control channels;

figure 4 - diagram of the device of the automated process control of thermal prepare to construct monolithic concrete structures constructed in two or more stages in the conditions of a construction site.

Device for heat treatment of monolithic concrete structures, mainly bridges, in conditions of construction sites includes forming a pre-computed number of independent channels of control “control” and “control” the devices 1 connected to the inputs of the controllers 2, the outputs of which through the switching units 3 with magnetic actuators connected to respective electric heating elements 4. Each control channel contains at least six installed in the designated settlement areas monolithic design of the sensor, and the sensor 5 temperature of the surrounding air, is connected to the inputs of the corresponding programmable controller for supplying control signals. The signals are sent to the group of electric heating elements 4 in each channel condition is set out respectively in the sides and at the bottom of the casing a prepared area of the monolithic structure. At the same time as the electric heating elements 4 used non-metallic heaters polymer (NEP), which carry out heating of the concrete convective-radiative method, and the heating elements of the bottom - convective-contact method. Each channel regulation may be made in the form of at least three independent sub-regulation temperature, respectively, in average, the upper (or right) and lower (or left) points control area. To provide visual control device for automatic process control of thermal preparation of monolithic reinforced concrete structures is equipped with a monitor 6 and/or a printer 7 for displaying temperature values.

The signal from the sensor as a change in resistance is converted into the temperature controller in the frequency. The microprocessor controller type TRM (produced by LLC "ARIES", Moscow) compares the specified value with the actual and produces the error signal. This signal is in the form of potential CALL arrives at the switching unit capacity, consisting of electromagnetic relays. Depending on the sign of the signal corresponding relay is activated or deactivated magnetic starter, connecting or disconnecting the heater 4 from the power supply. Thus, the supported set temperature in the channel guide the project. In each channel there are three independent subchannel regulation. This allows for the setting and adjustment of termorio managed plots concrete structures depending on the specific terms and conditions and provides an exact match thermostress design preliminary calculation. Control the temperature sensors installed in the designated settlement areas, allow you to have current information about temperatures during the technical process, to bring it in strict compliance with the requirements of the governing documents and, if necessary, make appropriate adjustments. Sharing all prepared for concreting section monolithic design for independent control channels allows you to create a high uniformity of temperature distribution throughout the volume of the site, regardless of its thermal characteristics. The management process of heating the program PC is in issue in thermostat at prescribed times required values of temperature in the control channel, a periodic survey of the temperature sensors, the monitoring of compliance with process requirements of regulatory documents, displaying temperature values on the screen and/or on a printing device, for which minani temperatures of the concrete and the ambient air in the disk file, as well as in the implementation of a number of auxiliary operations that collectively improves the quality of manufacture of the bridge structure, to reduce the risk of cracking temperature of character in areas of the Association built previously and newly constructed section of the monolithic reinforced concrete structures.

1. Device for heat treatment of monolithic concrete structures, mainly bridges, in the conditions of the construction site, containing the formwork installed in its sides with electric heating elements for convective-radiative heating of the concrete mixture and set in its bottom heating elements for convection-contact heating with independent control channels of the sensors connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements, with each control channel includes at least six installed in the monolithic design of temperature sensors and the temperature sensor ambient air, is connected to the inputs of the corresponding programmable temperature controller for supplying control signals.

2. Device for heat treatment of monolithic reinforced concrete structures according to claim 1, in which the each control channel may be in the form of at least three independent sub-regulation temperature, respectively, in the middle of the upper or lower right or left points of the control area.

3. Device for heat treatment of monolithic reinforced concrete structures according to claim 1 or 2, in which to provide visual inspection it is equipped with a monitor and/or printer to display temperature values.



 

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Curing room // 2454324

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