JP6033272B2 - Concrete secondary product curing control device with post curing control function for winter - Google Patents

Description

  The present invention generally relates to an apparatus for controlling the curing process during the production of concrete secondary products. More specifically, the present invention relates to a concrete secondary product curing control device with a post-curing control function for winter that can be applied even in winter.

  Concrete secondary products such as fume pipes, piles, box culverts, panels, etc., are used for concrete curing in order to promote the hardening action and prevent the generation of cracks due to drying after putting the concrete into the predetermined formwork. It is housed and cured. Concrete curing is generally performed in a concrete curing chamber by first increasing the temperature at a predetermined temperature elevation angle and then holding the temperature constant for a predetermined time. Thus, the curing process is an indispensable process for producing high-quality concrete secondary products.

  However, if the outside air temperature is extremely low in the winter, it is expected that the temperature will drop rapidly after the curing process is completed. There is a detrimental effect that the quality of the concrete secondary product is impaired due to occurrence or cracks.

  This invention is developed in view of such a condition, Comprising: It aims at providing the concrete secondary product curing control apparatus with the post-curing control function for winter seasons which can respond | correspond appropriately also in winter seasons.

A concrete secondary product curing control device with a winter curing control function described in claim 1 of the present application is a temperature at which temperature information is received from a timer and a temperature sensor that detects the temperature in the curing chamber in which the concrete secondary product is placed. An information receiving unit, an operation for calculating a temperature gradient (ΔT _i ) / (Δt _i ) based on time information (t _i ) from the timer and temperature information (T _i ) from the temperature information receiving unit A comparison unit for comparing the magnitude of the temperature gradient (ΔT _i ) / (Δt _i ) calculated in the calculation unit with a preset value α, and a steam supply pipe for supplying steam into the curing chamber and a valve portion for opening and closing the placed valve, said have you to curing chamber to raise the temperature at a predetermined Atsushi Nobori angle, the present curing of the concrete secondary product by holding a predetermined time constant temperature After being done Closing the valve to stop the supply of steam into the curing chamber ;
When the temperature gradient (ΔT _i ) / (Δt _i ) becomes larger than the value α, the valve is opened, and when the temperature gradient (ΔT _i ) / (Δt _i ) becomes less than the value α, the valve is closed. , and it is characterized in that it is configured to reduce the temperature of the curing chamber more within a predetermined temperature lowering gradient thereto.

  A concrete secondary product curing control device with a post-curing control function for winter described in claim 2 of the present application is characterized in that, in the device of claim 1, the value α is −20 ° C./hour. It is.

  According to the present invention, it is possible to avoid a rapid decrease in the temperature in the curing chamber during post-curing, so that the quality of the concrete secondary product can be maintained well even in winter. Since the apparatus of the present invention has a relatively simple structure, the manufacturing cost can be reduced and maintenance management is also easy.

BRIEF DESCRIPTION OF THE DRAWINGS It is the figure which showed typically the curing room controlled by the concrete secondary product curing control apparatus with a winter curing control function which concerns on preferable embodiment of this invention, and this apparatus. It is the schematic diagram which showed the detail of the concrete secondary product curing control apparatus with a post curing control function for winter seasons. It is a flowchart which shows the operation example of the concrete secondary product curing control apparatus with a post curing control function for winter seasons. FIG. 4A is a graph showing the relationship between time and temperature in the curing chamber, and FIG. 4B is an enlarged view of a portion 4b in FIG. 4A.

  Next, a concrete secondary product curing control device with a winter post-curing control function according to a preferred embodiment of the present invention will be described with reference to the drawings. FIG. 1 schematically shows a curing room controlled by a concrete secondary product curing control device with winter curing control function (hereinafter simply referred to as “curing control device”) according to a preferred embodiment of the present invention. FIG. In FIG. 1, reference numeral 10 indicates a curing room in which a concrete secondary product is placed during curing. The curing room 10 is provided with a door 10a for carrying in / out concrete secondary products.

  A steam pipe 12 is arranged in the lower part of the inside of the curing room 10, and the steam pipe 12 is a plane along three side walls other than the side wall provided with the door 10 a among the side walls of the curing room 10. It is arranged in a visual “U” shape. The steam pipe 12 is provided with a plurality of steam discharge holes 12a at predetermined intervals.

  The steam pipe 12 is connected to a steam generation source (not shown) disposed outside the curing chamber 10 via a steam supply pipe 14. The steam supply pipe 14 is provided with a valve 16 for supplying and shutting off the supply of steam to the curing chamber 10.

  The curing chamber 10 is provided with a temperature sensor 18 for detecting the temperature inside the curing chamber 10.

  The curing room 10 is usually provided with a steam discharge pipe for discharging the steam in the curing room 10 to the outside, and an outside air introduction pipe for introducing outside air into the curing room 10. The piping 14 is usually provided with a pressure reducing valve unit for supplying high-quality steam with low moisture and large latent heat, but since it is not directly related to the gist of the present invention, further explanation and illustration are omitted. .

As shown in FIG. 2, the curing control device 20 includes a timer 20a, a temperature information receiving unit 20b that receives temperature information from the temperature sensor 18, and a time information (t _i ) and temperature information receiving unit 20b from the timer 20a. based on the temperature information (T _i) from a temperature gradient _{(ΔT i) / (Δt i} ) and the arithmetic unit 20c for calculating a calculated temperature gradient in the calculating section _{20c (ΔT i) / (Δt} i ) And a preset value α, and a valve opening / closing unit 20e for transmitting a signal for closing the valve 16 when the temperature gradient (ΔT _i ) / (Δt _i ) is larger than the value α. And.

  Next, the use of the curing control device 10 configured as described above will be described. First, the concrete secondary product to be cured is carried into the curing room 10. Next, the steam is discharged from the steam discharge hole 12 a of the steam pipe 12 into the curing chamber 10. Then, the temperature in the curing room 10 rises at a predetermined temperature increase angle as indicated by A to B in FIG. Next, by adjusting the discharge of the steam, as shown in B to C in FIG.

When this curing operation is completed, post-curing (C to D) is performed. FIG. 3 is a flowchart showing the post-curing process. When the steam discharge is stopped, the temperature in the curing chamber 10 gradually decreases. At that time, the temperature information (T _i ) detected by the temperature sensor 18 is sent to the temperature information receiving unit 20 b of the curing control device 10. Then, based on the received temperature information (T _i ) and the time information (t _i ) from the timer 20a, the computing unit 20c calculates a temperature gradient (ΔT _i ) / (Δt _i ). Next, the comparison unit 20d compares the temperature gradient (ΔT _i ) / (Δt _i ) with the set value α, and the temperature gradient (ΔT _i ) / (Δt _i ) is larger than the set value α ((ΔT _i). ) / (Δt _i )> α), an opening signal is sent from the valve opening / closing part 20 e to open the valve 16, and steam is injected into the curing chamber 10 from the steam discharge hole 12 a of the steam pipe 12. Thereby, the temperature in the curing room 10 rises. When the temperature gradient (ΔT _i ) / (Δt _i ) becomes equal to or less than the set value α ((ΔT _i ) / (Δt _i ) ≦ α), the valve 16 is closed by sending a closing signal from the valve opening / closing part 20e. Stop steam injection. The above operation is performed throughout the post-curing period so that the temperature in the curing room 10 is lowered within a predetermined temperature drop gradient range. After the end of the post-curing period, the door 10a is opened to carry out the concrete secondary product.

  The set value α is preferably −20 ° C./hour.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the invention described in the claims, and these are also included in the scope of the present invention. Needless to say, it is something.

  For example, the shapes, dimensions, and the like of the curing chamber 10 and the steam pipe 12 shown in FIG. 1 are merely examples, and shapes, dimensions, and the like other than those illustrated may be adopted.

DESCRIPTION OF SYMBOLS 10 Curing room 12 Steam piping 14 Steam supply piping 16 Valve 18 Temperature sensor 20 Concrete secondary product curing control device with post-curing control function for winter season 20a Timer 20b Temperature information receiving unit 20c Calculation unit 20d Comparison unit 20e Valve opening / closing unit

Claims (2)

Concrete secondary product curing control device with post curing control function for winter season,
Timer,
A temperature information receiving unit that receives temperature information from a temperature sensor that detects the temperature in the curing room where the concrete secondary product is placed;
A computing unit for calculating a temperature gradient (ΔT _i ) / (Δt _i ) based on time information (t _i ) from the timer and temperature information (T _i ) from the temperature information receiving unit;
A comparison unit that compares the temperature gradient (ΔT _i ) / (Δt _i ) calculated by the calculation unit with a preset value α;
A valve opening and closing part for opening and closing a valve disposed in a steam supply pipe for supplying steam into the curing chamber;
Wherein the temperature is raised in the curing chamber at a predetermined Atsushi Nobori angle, after the curing of said concrete secondary products is performed by maintaining a predetermined time constant temperature, to the nutrient raw chamber by closing the valve Stop the supply of steam ,
When the temperature gradient (ΔT _i ) / (Δt _i ) becomes larger than the value α, the valve is opened, and when the temperature gradient (ΔT _i ) / (Δt _i ) becomes less than the value α, the valve is closed. The apparatus is configured to reduce the temperature in the curing chamber within a range of a predetermined temperature decrease gradient .   2. The apparatus according to claim 1, wherein the value [alpha] is -20 [deg.] C./hour.

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