The automatic control device process heat treatment of precast concrete products

 

(57) Abstract:

The invention relates to the construction and manufacture of building products of concrete with the use of automatic process control of heat treatment. The present invention is to improve the quality of manufacturing products. This is achieved by the fact that the automatic control device process heat treatment of precast concrete products, mainly bridge beams, stand in the steam-chamber containing forming two independent channels regulate the temperature sensors connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements, each control channel includes at least seven installed in the most heat-stressed areas of the beam temperature sensors and the temperature sensor ambient air, is connected to the inputs of the corresponding programmable controller for supplying control signals, at least three groups of heating elements in each channel are installed respectively at the sides and at the bottom of the casing stand-camera. When metodom, and the heating elements of the bottom - convective-contact method. Each channel regulation may be made in the form of three independent sub-regulation, respectively, the temperature in the middle, right and left points of the beam and the temperature of the bottom of the beam. To provide visual control device for automatic process control of heat treatment of precast concrete products is equipped with a monitor and/or printer to display temperature values. 3 C.p. f-crystals, 2 Il.

The invention relates to the field of construction, namely the manufacture of construction products made of reinforced concrete with providing automatic control of the heat treatment process.

Known the closest in technical essence is the automatic process control of heat treatment of precast concrete products, mainly bridge beams, stand in the steam-chamber containing forming two independent control channel sensor connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements (Author's certificate no lengthy articles, type of bridge beams, due to the inability to maintain them heat treatment schedule.

The present invention is to improve the quality of manufacturing products.

This is achieved by the fact that the automatic control device process heat treatment of precast concrete products, mainly bridge beams, stand in the steam-chamber containing forming two independent control channel sensor connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements, each control channel includes at least seven installed in the most heat-stressed areas of the beam temperature sensors and the temperature sensor ambient air, is connected to the inputs of the corresponding programmable controller for supplying control signals, at least three groups of heating elements in each channel are installed, respectively, at the sides and at the bottom of the casing stand-camera. In this case the heating elements in the sides carry out heating of the casing stand-camera convective-radiative method, and the n in the form of three independent sub-regulation, respectively, the temperature in the middle, the right and left points of the beam and the temperature of the bottom of the beam. To provide visual control device for automatic process control of heat treatment of precast concrete products is equipped with a monitor and/or printer to display temperature values.

The invention is illustrated by drawings, where

- Fig. 1 presents a diagram of the device for automatic process control of heat treatment of precast concrete products;

- Fig. 2 is a diagram of the locations of the sensors on the cross-section of products on the example of the bridge beams.

The automatic control device process heat treatment of precast concrete products, mainly bridge beams, stand-camera, includes forming two independent channels of 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 seven installed in the most heat-stressed areas of the beam sensors and sensor 5 temperature of the surrounding air, is connected to the inputs of corresponding programmerelated 4 in each channel, installed, respectively, at the sides and at the bottom of the casing stand-camera. At the same time as the electric heating elements 4 in the sides used non-metallic heaters polymer (NEP), which carry out the heating of the formwork panels stand camera convective-radiative method. Electric heating elements 4 of the bottom formwork conduct heat convective-contact method. Each channel regulation may be made in the form of three independent sub-regulation, respectively, the temperature in the middle, right and left points of the beam and the temperature of the bottom of the beam (see Fig. 2). To provide visual control device for automatic process control of heat treatment of precast concrete products supplied by the 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 TERM production IHL "ARIES" , Moscow compares the set value with the actual and produces the error signal. This signal is in the form of a potential 30 is supplied to the switching unit capacity, consisting of electromagnetic relays. In head and turning off the heater 4 from the power supply. This supports the desired temperature at the location of measurement. In each channel there are three independent subchannel regulation. This allows for the setting and adjustment of termorio side of the casing and bottom depending on the specific terms and conditions and provides significant flexibility in the development of thermal faults. Additional control of the temperature sensors installed in the most heat-stressed areas, allow you to have current information about temperatures during the technical process and, if necessary, make appropriate adjustments. The heater casing at the sides, with no contact with the metal casing, carry out heating of the casing radiation (radiative) method, creating a high uniformity of temperature distribution on the heating surface. The management process of heating the program PC is in issue in thermostat at prescribed times required values of temperature at the point of attachment of the respective sensor, periodic survey of temperature sensors, displaying temperature values on the screen and/or on the tape printing device, storing the values of the temperature of the casing and the ambient air in decadestwo manufacturing products.

1. The automatic control device process heat treatment of precast concrete products, mainly bridge beams, stand in the steam-chamber containing forming two independent channels regulate the temperature sensors connected to the inputs of the controllers, the outputs are via switching units with magnetic actuators connected to respective electric heating elements, wherein each control channel includes at least seven installed in most tendonopathy locations beams of the temperature sensors and the temperature sensor ambient air, is connected to the inputs of the corresponding programmable controller for supplying control signals, at least three groups of heating elements in each channel, installed respectively at the sides and at the bottom of the casing of the camera stand.

2. The automatic control device process heat treatment of precast concrete products under item 1, characterized in that the heating elements in the sides carry out heating of the casing stand-camera convective-radiative method, and the heating elements of the bottom - convective-contact method.

4. The automatic control device process heat treatment of precast concrete products according to any one of paragraphs.1 to 3, characterized in that it is equipped with a monitor and/or printer to display temperature values.

 

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