JPH0425295Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a concrete molding curing device for heating and curing an uncured concrete molding immediately after molding.

(Prior Art) As shown in FIG. 4A, a conventional device of this type has a floor 11 installed inside an envelope 10 that forms a shielded space and keeps the inside warm.
A steam supply pipe 13 having a plurality of steam injection ports 12 is inserted into a space surrounded by The concrete molding 14 placed on the floor 11 is
There was something that directly heated and cured the food.

The above type is called a wet type, and there is also a dry type, for example, as shown in Figure 4B, the outer shell 1
A steam transport pipe 15 without an injection port is inserted under the floor 11 installed inside the floor 11, and steam is passed through this transport pipe to heat the floor 11 and indirectly heat the concrete molded product placed on the floor 11. There was something to heat and cure.

(Problem that the invention attempts to solve) Generally speaking, curing of concrete moldings is done while keeping the concrete moldings at around 70℃, considering both productivity and the quality of the concrete moldings after curing. It is considered ideal to do so.

However, since the conventional equipment configured as described above uses high-temperature water vapor with a small heat capacity per unit volume as a heating source, concrete moldings that are cured when water vapor is continuously pumped in cannot be cured. The temperature easily exceeds 70°C, and therefore the water must be flushed intermittently.
When the supply of water vapor is stopped, the temperature drops immediately, or even drops too much, making it difficult to keep the temperature of the concrete molded product constant.

In addition, since the heat capacity is small, heat is taken away while passing through the pipe, and a temperature difference easily occurs between the steam introduction part and the steam outlet part of the steam supply pipe or steam transport pipe. Since it takes time for the parts to become uniform, if the concrete molding before curing is long, there is a problem that the degree of curing will be different between the base end and the tip end. Furthermore, the pipes are exposed in the space inside the envelope and rust due to the steam, reducing the durability of the curing device and making replacement of the pipes complicated, time-consuming, and costly. There is a problem in that steam sprayed directly onto the surface of concrete moldings inevitably condenses.

In view of the above-mentioned conventional problems, the present invention aims to provide a concrete molded product curing device that can easily control the temperature during curing and can evenly and uniformly cure the concrete molded product.

(Means for Solving the Problems) In order to achieve the above object, the present invention includes a concrete molded product curing device, which includes a long box-shaped outer envelope, and is provided inside the outer envelope, and has a concrete molded product on the upper surface thereof. A heating bed made of thick concrete plates to be placed on, a pipe for hot water circulation that is filled in the heating bed in the longitudinal direction and bent many times to prevent it from rusting, and a pipe for circulating hot water through the pipe. a hot water circulator, a heat insulating material is interposed over the entire surface between the floor surface of the enclosure and the heating bed, and a hot water inlet end and a hot water outlet end of the hot water circulation pipe are It was configured to extend outside the outer envelope and connect to the hot water circulator, and to continuously flow hot water through the pipe so as to heat the concrete molding at a constant temperature of about 70°C.

(Function) The concrete molding curing device configured as described above has pipes for hot water circulation buried in a heating bed made of thick concrete plates, so the alkaline nature of the concrete prevents the pipes from rusting. This improves the durability of the equipment, and during curing, the hot water circulator is operated to supply and circulate hot water into the hot water circulation pipe, and this warm water warms the concrete heating bed, which further heats the concrete. The concrete molding placed on the floor is heated and cured. In this case, since the heating bed is a concrete plate, the concrete molding must be cured at a constant temperature.
Since the pipes buried in the heating bed are bent many times and are formed all the way in the longitudinal direction of the heating bed, the heating bed is heated uniformly,
It is suitable for curing concrete moldings.

(Example) Next, an example of the implementation of the present invention will be described with reference to the drawings of FIGS. 1 to 3.

As shown in FIG. 1, a concrete molded product curing device 1 according to the present invention includes an outer envelope 2 formed in the shape of a long box with a downward opening.

The outer enclosure 2 has a lid 22 placed on a main body 21 with an upper opening. A heat insulating material 3 is laid on the internal floor surface of this envelope 2.

A concrete heating bed 4 made of a thick concrete plate is placed on the heat insulating material 3 at the full length of the outer envelope 2 in the longitudinal direction. Inside this concrete heating floor 4, a pipe 5 for hot water circulation is embedded all the way in the longitudinal direction.

The hot water circulation pipe 5 is formed by being bent many times, so that when hot water is circulated inside, the concrete heating floor 4 can be heated uniformly.

Hot water introduction side end 51 of this hot water circulation pipe 5
And, the hot water outlet side end portion 52 is connected to the outer envelope 2.
The outer wall 2 is extended to the outside of the outer wall 2 through the
It is connected to a hot water circulation machine 6 installed near the.

The concrete molding curing device configured as described above is heated at a temperature slightly higher than the curing temperature, e.g.
By continuously flowing hot water at 90℃, concrete moldings can be cured while maintaining a constant temperature of around 70℃. In addition, in the concrete molding curing device of the above-described embodiment, the concrete heating bed, which is heated by hot water to heat the concrete molding before curing, is made of thick concrete that has a higher heat capacity than air, that is, is less susceptible to temperature changes. Since it is made of plates, it is easier to heat the concrete molded product at a constant temperature, but the concrete heating floor of the present invention has side wall plates erected on both sides as in the conventional case, and there is a gap between the wall plates on both sides. It is also possible to form a floor-like structure by spanning horizontal boards across the floor.

Further, although a long box-like body with a downward opening is used as the outer body 2, it may also be used by using a heat insulating sheet to cover the concrete molding or heating floor to be cured.

(Effects of the invention) The invention is constructed as described above, and a concrete heating bed is provided with a heat insulating material interposed inside the heat-retaining envelope, and a rust-resistant hot water circulation pipe is arranged inside the concrete heating bed. At the same time, a hot water circulation device is installed to supply and circulate hot water into the hot water circulation pipe, and the hot water is not as high as water vapor, but has a larger heat capacity than water vapor, that is, the temperature does not easily change, and the hot water is heated over the concrete heating bed. By heating and curing the concrete moldings placed on the concrete at a constant temperature of around 70℃, the concrete moldings that were being cured would be heated to extremely high temperatures even if hot water was constantly circulated. Therefore, there are the following effects. That is, since hot water is continuously circulated and the concrete molding is heated through concrete slabs with an extremely large heat capacity, temperature control is easy, and since steam is not directly sprayed into the curing device, the concrete molding can be warmed. There is no problem with dripping condensation, and there is no risk of excessive humidification or dryness.
In addition, unlike conventional curing equipment, it does not require the effort of intermittently flowing steam or hot water to control the temperature with a temperature control device, and since such equipment is not required, the entire curing equipment is low cost. Become.

The temperature difference between the hot water introduction part and the hot water outlet part caused by the temperature drop when the heating source passes through the pipe is less likely to occur, the entire heating bed has a uniform temperature distribution, and the concrete molding can be cured at a uniform temperature, which is preferable. Become something.

The curing device of the present invention has a structure in which heat is conducted directly from the heating bed to the concrete molding, so thermal efficiency is improved because it does not use a steel base plate, which has a smaller heat capacity than a concrete slab, or air, which has a lower thermal conductivity, as a medium. Moreover, since there is a heat insulating material under the heating bed, there is no wasted energy consumption.

Since the hot water circulation pipe of the curing device according to the present invention is buried in a thick concrete plate, there is no fear that the pipe will rust, the product life is extended, and the running cost of the curing device as a whole is reduced.

Further, unlike the pipes of conventional curing devices, there is no need to replace rusted pipes, so there is no need to replace parts, and the durability and reliability of the curing device is improved.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention; Figure 1 is a plan view, Figure 2 is a front view, Figure 3 is a vertical cross-sectional view of the outer enclosure portion, Figure 4 is a B is a vertical sectional view showing a conventional example. 1... Concrete molding curing device, 2... Outer enclosure, 4... Heating floor, 5... Hot water circulation pipe,
6...Hot water circulation machine.

Claims (1)

[Scope of utility model registration request] A long box-shaped outer enclosure, a heating bed made of a thick concrete plate that is provided inside the outer enclosure and on which a concrete molded product is placed, and a number of layers that are filled in the longitudinal direction within the heating bed. Pipe for hot water circulation is bent and buried to prevent rusting.
a hot water circulator for circulating hot water through the pipe; a heat insulating material is interposed over the entire surface between the floor surface of the outer enclosure and the heating bed; The hot water outlet end is extended to the outside of the outer envelope and connected to the hot water circulator, and hot water is continuously supplied to the pipe so as to heat the concrete molded product at a constant temperature of about 70°C. A concrete molding curing device that is characterized by pouring.