RU2256209C1 - Automatic control apparatus for process of concrete heat treatment in thermo-active forms - Google Patents

Abstract

FIELD: building equipment, namely apparatuses for controlling process of heat treatment of concrete, possibly automatic control of manufacturing process at construction of monolithic houses.

SUBSTANCE: apparatus includes heaters for heating placed concrete mixture, pickups for detecting concrete mixture temperature, temperature regulator that limits temperature of surface layer of concrete and in addition it includes pickups for detecting temperature of outer air and wind speed, pickups for detecting concrete temperature in zones of its contact with heaters, concrete strength pickup and second temperature regulator. First temperature regulator controls temperature of heat transfer agent of outer board and second temperature regulator controls temperature of inner board.

EFFECT: possibility for creating optimal conditions for setting concrete.

3 dwg

Description

The invention relates to the construction industry, in particular to devices for controlling the technological process of heat treatment in monolithic housing construction.

In construction, in the manufacture of reinforced concrete products, devices for their heat treatment are known that provide acceleration of the increase in the strength of products [Mironov S.A. Theory and methods of winter concreting. Ed. 3rd, rev. and add., M .: Stroyizdat, 1975 - 700s.]. Moreover, the coolant supply is adjusted and limited when the maximum surface temperature of the products is reached. However, at the same time, it is impossible to provide concrete with a given strength for the shortest period of time with a minimum of energy consumption. In addition, the disadvantages of the device are low productivity, high complexity, low quality of work, lack of comfortable working conditions for staff.

The closest in technical essence and the achieved effect to the claimed device is a temperature and humidity control device for processing reinforced concrete products in batch installations (USSR author's certificate No. 1529180, class G 05 D 27/00, 1987), including a product heater, command unit, temperature controller, temperature sensors.

The known device is focused on factory technology for the production of products in stationary climatic conditions and does not fully meet the requirements of heat treatment of products on an open construction site in the conditions of abruptly varying external factors, for example, outdoor temperature and wind speed, which takes place in monolithic housing construction.

Without taking into account the listed external factors, it is impossible to accurately determine the optimal time for isothermal heating of concrete and to predict the cooling time of concrete, which will not allow timely termination of the coolant supply and lead to energy overruns.

In addition, without taking into account the outdoor temperature and wind speed, it is impossible to correctly control the rate of rise in temperature of the concrete mixture (from 5 ° C to 20 ° C per hour, depending on the module of the surface of the structure) and the cooling rate of concrete (15 ° C per hour), which may lead to a decrease in the quality of construction products.

The aim of the invention is to provide optimal conditions for hardening concrete structures.

This goal is achieved by the fact that the automatic control device for heat treatment of concrete in thermo-active formwork, containing heaters of the laid concrete mixture, temperature sensors of the mixture, a temperature controller that limits the temperature of the surface layer of concrete by changing the flow rate of the coolant during heat treatment, is additionally equipped with outdoor temperature sensors and wind speed, concrete temperature sensors in the contact zone with heaters, concrete strength sensor and WTO th temperature controller, wherein the first controller controls the flow temperature of the outer shield, and the second - the inner shield.

A comparative analysis of the proposed solution with the prototype shows that the claimed device is distinguished by the presence of new units, namely, it is equipped with sensors for outdoor temperature and wind speed, sensors for temperature of concrete in the contact zone with heaters, a sensor for concrete strength.

Thus, the claimed device meets the criteria of “novelty” and “inventive step”.

Figure 1 presents a block diagram of a device for automatic control of heat treatment of concrete in thermosetting formwork. Figure 2 shows the functional diagram of the control unit. Figure 3 - block diagram of the algorithm of operation of the device.

The automatic control device for heat treatment of concrete in thermoactive formwork (Fig. 1) contains a control unit 1, in which a command unit 2, a computing device 3, a temperature regulator 4 of an external formwork panel 12, a temperature controller 5 of an internal formwork panel 13, a wind speed sensor are implemented 6, an outdoor temperature sensor 7, a concrete temperature sensor in the contact zone 8 with the outer formwork panel 12, a concrete temperature sensor in the contact zone 9 with the internal formwork panel 13, a concrete temperature sensor 10 in the body of the structure 14, a concrete strength sensor 11.

The control unit 1 (figure 2) is a programmable logic controller PCD1.M120, consisting of a central processing unit 15, a power supply 16, an ADC unit 17, a DAC unit 18, a digital input block 19, a digital output block 20, a data bus and control 21, a real-time timer block 22, a memory block 23, an input block for fast counters and interrupts 24, and a serial interface unit 25.

Sensors of wind speed 6 and outdoor temperature 7 are connected to the first and second input of the command unit, respectively. The temperature sensors of concrete in the body of structure 10, the temperature of concrete in the contact zone with the outer shield of thermoactive formwork 8, the inner shield 9 are connected to the third, fourth and fifth input of the command unit, respectively. The concrete strength sensor 11 is connected to the sixth input of the command unit. The computing device 3 is connected to the third output of the command unit 2. The temperature controller of the outer shield of the formwork 4 is connected to the first output of the command unit 2. The temperature controller of the internal shield of the formwork 5 is connected to the second output of the command unit 2. The command unit 2 is connected to the first output of the computing device 3.

The device operates as follows (figure 3). After the control unit 1 is turned on, a command is generated to turn on the outdoor temperature sensors 6 and wind speed 7, the concrete temperature sensors in the contact zone with heaters 8 and 9, and the concrete temperature sensor 10 in the body 14.

The command unit queries the initial parameters of the concreting process (type of concrete structure, structural features of the thermo formwork, type of concrete laid, module of the surface of the structure). In the absence of input of such parameters, the request is repeated.

After entering the initial parameters, the computing device 3, in accordance with the data received at the inputs of the command unit from the outdoor temperature sensors 7, wind speed 6 and the concrete temperature sensor in the body 10, determines the temperature regime of heat treatment.

Computing device 3 transmits information to the seventh input of the command unit. The command unit 3 sends a signal to the temperature controllers 4 and 5. The panels of the thermally active formwork 12 and 13 begin the process of heat treatment of concrete structure 14.

Temperature controllers 4 and 5 support and limit the temperature values set by the computing device 3.

During heat treatment, the wind speed sensor 6, the outdoor temperature sensor 7, the concrete temperature sensor 10 in the structure, the concrete temperature sensors in the contact zone with thermoactive formwork 8 and 9, constantly supply information to the inputs of the command unit. With sudden changes in external factors or emergency situation, the computing device 3 corrects the heat treatment mode or stops it.

After completion of the heat treatment time, the command unit 2 sends a signal to the temperature controllers 4 and 5 to stop the flow of coolant.

Strength sensor 11 determines the strength gained by concrete, if the obtained value does not match the specified value, the process of heat treatment of concrete continues.

Using the proposed device for automatic control of the process of heat treatment of concrete in thermoactive formwork provides the following advantages compared to existing devices.

1. The technologically necessary rate of rise in temperature of the concrete mixture and the rate of cooling of concrete are precisely maintained under conditions of abruptly varying external factors (outdoor temperature and wind speed), which ensures the quality of construction products.

2. In addition, the implementation of heat treatment of concrete by the proposed device provides a set of structural design of a given strength for the shortest period of time with a minimum of energy consumption.

3. The use of the proposed device in the process of erecting monolithic buildings and structures in sliding and climbing formwork will significantly increase the productivity of work while reducing the complexity and improving the quality of construction.

Claims (1)

Automatic control device for heat treatment of concrete in thermo-active formwork, containing heaters of laid concrete mixture, temperature sensors of concrete in the body of the structure, temperature sensors of the surface of the concrete structure, a temperature controller that limits the temperature of the surface layer of concrete by changing the flow rate of the coolant during heat treatment, outdoor temperature sensors air and wind speed, characterized in that it is additionally equipped with a concrete strength sensor and a block an equation in which the command unit, the computing device, the first temperature controller of the outer shield of the formwork, the second controller of the temperature of the inner shield are implemented, the sensors of wind speed and outdoor temperature being connected to the first and second inputs of the command block, to the third, fourth, fifth and sixth the inputs of which are connected respectively to the temperature sensors of concrete in the body of the structure, the temperature of concrete in the contact zone with the outer shield of the thermoforming, the temperature of concrete in contact hydrochloric zone with an inner shield sensor durability of concrete, and the computing device controls the external and internal temperature termoopalubki panels respectively connected to the third, first and second inputs command block which is connected to the first output of the computing device.

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