CS199844B1 - Equipment for heating control of concrete elements - Google Patents

Description

(54) Equipment for regulation of heating of concrete parts

The invention relates to a device for regulating the heating of concrete members to enable the concrete member to be heated to optimal, predetermined values. steadeoh sin.

A disadvantage of the present state is that the heat-sinking work wt is substantially regulated. In operation, the heating time is predominantly determined by time, regardless of the actual level of thermal insulation of the work ». No suitable reagents or apparatus are known which assure the true state of the component during the anti-flooding process. The supplied thermal energy usually deviates from the optimum values and is considerably higher in order to secure the demoulding strengths. The specified thermal mode can only be changed according to the subjective operator's decision.

Under operating conditions, contactless thermometers are not known and available to measure the surface temperatures of the components. Integration of control sensors, eg thermocouples into components and its evaluation of operation in operation is unusable · Obviously, the evaluation of the state of thermal insulation of components in operation must be carried out based on a different physical quantity than the temperature.

The aforementioned drawbacks are overcome by the device for controlling the heating of the concrete elements according to the invention, which is based on the fact that it is based on the invention. at least one energy meter is connected to the power source, to whose inlet at least one shutter is connected, to whose output at least one heating element is connected, in the vicinity of which is a heating element, the outlet

199 644

199 844 of at least one energy meter is coupled to an evaluation device whose at least one output is connected to the shutter control inputs. The heating surfaces and elements are located in the space for heating.

By measuring the energy supplied to the heat treatment device and terminating the heat treatment after the delivery of the prescribed amount of energy, sufficient heating of the workpiece and thus sufficient demoulding strength can be guaranteed, while supplying the minimum amount of energy necessary for heating.

The optimum amount of heat ee is determined by calculation and verified by tests for basic parameters! type of anti-flooding device, ambient temperature, type of component, required component warming, ie the difference between the initial and final temperature, etc., expressed in energy balance * ^q o ' ^q p ⁺ % ⁺ %' ^q h ^{+ q} z, where q _o is the total amount of heat

Is the amount of heat to heat the substrate q _b is the amount of heat to heat the work (concrete) q _Q is the heat to evaporate the water from the work q _b is actually the developed heat of hydration aq _from Jeou heat loss (jacket, ventilation).

It can be stated that in a steady state, q _p , q _b , q _Q »q _{b and} q _z in a given anti-floating device are always almost constant, so we can determine the total energy required q ₀ , which can be well measured and proportional to .

The accompanying drawings show two examples of connections for controlling the heating of concrete members. Giant. 1 shows a circuit suitable for a heat recovery device where the workpiece is at rest for a long period of heating, e.g. a heat chamber, a pit, a lid, etc. The circuit in FIG. anti-floating tunnel *

An energy meter 2 is connected to the power source 8, in which the first shutter 4.1 is inserted in the supply 6.1 and the second shutter 4.2 is connected in the supply 6.2. Two heating surfaces 5.1, 5.2 are connected in parallel to the outlets of both shutters 4.1, 4.2, between which a panel 6 is arranged. Exit

9.1 of the energy meter 8 is connected to the input of the evaluation device 2 and the output 9.2 of the evaluation device 2 3 is connected to the control inputs of the shutters 4.1, 4.2, the heating surfaces

5.1, 5.2 and the part 6 are enclosed in a heat-exchanging space bounded by the jacket 6.

In FIG. 2, there are a number of anti-floating points in the space provided by the screen. Each heating site has at least one heating panel 5.1, 5.2, in the vicinity of which is the part 6. One or several anti-floating objects, usually at the space of the anti-floating space, may be without heating surfaces 5.1, 5.2. To the energy source pro, for each heat exchanger, the heating surface 5.1, 5.2. An energy meter 6 is connected, in whose supply 6.1 a closure 4.2 is arranged. The heating plate 5.1, 5.2 is connected to the outlet of the shutter. The outputs 9.1 of all energy meters 8 are connected to the input of the evaluation device 2.

According to FIG. 1, the energy for heating is supplied by the energy source 8 to the heating surfaces 5.1.

5.2 and measured by the energy meter 6, the amount of energy required to heat the work of the type

199 844 is assigned to the evaluation device 8. After the delivery of the specified quantity, the evaluation device 8 gives an impulse to close the shutters 4.1, 4.2 and thereby terminate the intensive heating. Referring to FIG. 2, if the part in the heat-exchanging space is moved through a series of heat-exchanging points, the panel 6 receives a certain amount of energy at each heat-exchanging point. The sum of all these supplied energies must be equal to the energy to heat the panel £. The energy meter 2 of each warming-up site is evaluated by the evaluation device 6 and, after delivery of the determined amount of energy, a pulse is given to the shutters 4.1, 4.2 of the respective anti-float site to close until another part is moved to the anti-flooding site. This allows continuous measurement of the amount of energy, this amount is evaluated and after reaching the set values, the process of intensive heating is terminated.

Claims (1)

SUBJECT OF THE INVENTION Apparatus for regulating the heating of concrete components, characterized in that at least one energy meter (2) is connected to the energy source (8), to whose inlet (6.1, 6.2) at least one closure (4.1, 4.2) is connected, at least one heating surface (5.1, 5.2) is connected, in the proximity of which is the heated element (7), the output (9.1) of the at least one energy meter (2) being connected to an evaluation device (3) whose at least one output ( 9.2) is connected to the control inputs of the shutters (4.1, 4.2), where the heating surfaces (5.1, 5.2) and the part (7) are located in the anti-flooding space bounded by the jacket