Uniform heat generation system for concrete curing

Abstract

The present invention proposes a heat generation system for curing concrete. The uniform heat generation system for curing concrete according to one embodiment of the present invention includes a plurality of unit heat generation devices each closely coupled to an outer panel of a formwork for producing concrete; and a power supply unit for supplying power to the plurality of unit heat generation devices, wherein the unit heat generation devices each include a main body housing attached to a surface of the formwork panel and having a predetermined unit area; a handle coupled to an upper surface of the main body housing; and a planar heater coupled to a lower surface of the main body housing.

Description

[Technical field]

[0001] The present invention relates to a uniform heat generation system for curing concrete. [Background technology]

[0002] A form is a temporary structure used until the concrete hardens during the process of manufacturing a concrete structure. Since formwork is a temporary structure, it is generally separated and reused once the concrete has cured. Depending on the type and need, concrete structures can be mass-produced in factories or manufactured on-site, but formwork is always necessary to ensure the exact shape and dimensions of the concrete structure, whether it is mass-produced in a factory or manufactured on-site.

[0003] The manufacturing method of a concrete structure using an existing formwork generally involves setting up a formwork according to the shape of the concrete structure to be manufactured, placing rebar assemblies and the like inside the formwork, pouring concrete, and then curing the concrete.

[0004] The most important factor affecting the construction period in the manufacturing process of concrete structures using such forms is the curing time. That is, the longer the curing time, the longer the construction period, which causes an increase in construction costs. In particular, when the outside temperature is low, such as in winter or in extremely cold regions, the curing time is long, which causes the construction period to be extended, increasing the overall construction costs and making it difficult to meet the delivery deadline. Furthermore, in winter, problems occur in ensuring the quality of the concrete due to delays in the hydration reaction, which may lead to the use of additional additives or the absence of concrete pouring altogether.

[0005] In the manufacture of tall structures such as bridge piers and buildings, it is common to use Euro form, slip form, or climbing form form forms that cure the concrete structure from the floor up, but in this case, the curing time is very long for each pour, which causes the overall construction period to be extended. This problem is particularly prevalent in winter or in extremely cold regions where the outside temperature is low, so in the past, in order to shorten the construction period, construction methods such as inserting electric heating wires into the formwork to heat it, or using hot air blowers, stoves, steam, etc. to heat the formwork surface were used.

[0006] However, in the method of increasing the temperature using an electric heating wire, the electric heating wire must be installed in the formwork, which requires additional and complicated electrical work. In addition, electricity must be continuously supplied to the electric heating wire, which consumes a huge amount of electricity. In addition, after the formwork work is completed, the electric heating wire must be dismantled, which is a complicated dismantling work.

[0007] In addition, in order to heat the surface of the formwork with a hot air blower, stove, steam, etc., huge amounts of oil, gas, and electricity are consumed to operate the hot air blower, stove, boiler, etc., and it is difficult to guarantee the safety of workers due to the generation of toxic gases, and there is a risk of environmental pollution. Therefore, due to these problems, concrete pouring and curing for the construction of concrete structures such as bridge piers and buildings has had to be suspended from the very beginning in winter, which has caused the construction period to be extended.

[0008] The existing methods have the above-mentioned problems, which limit their use, and even if construction is carried out, it is difficult to proceed with construction work on concrete structures in winter due to safety issues, environmental issues, and excessive costs.

[0009] In order to solve the problems of the prior art, the present applicant has filed Korean Patent Application Nos. 10-2011-0130015 (title of invention: Heat-generating formwork for manufacturing precast concrete using microwaves), 10-2011-0130016 (title of invention: Method for constructing concrete bridge foundation using heat-generating formwork that generates heat by microwaves), 10-2012-0031331 (title of invention: Building construction method using heat-generating formwork that generates heat by microwaves), and 10-2012-0031340 (title of invention: Through the application for a formwork structure for tunnel concrete lining construction using a formwork that generates heat by microwaves and a tunnel concrete lining construction method using the same, the company proposed a new technology that can shorten the construction and production period of concrete structures by curing concrete by raising the temperature of the formwork using microwaves, without using huge amounts of fossil fuels such as oil and gas to raise the temperature required for curing, which is an issue that occurs when the outside temperature is low, such as in winter or in extremely cold regions.

[0010] The above patented technology has excellent heat generation efficiency and the effect of accelerating concrete curing, and allows the construction and manufacturing of concrete structures to be carried out effectively in winter. However, there are problems with the difficulty of uniformly transmitting microwaves to the heating element, and the possibility of heat being generated uniformly overall. If a malfunction occurs in the microwave generating section, the entire system will not function, which may result in poor construction. In addition, the weight and volume of the heating system are excessively large, making it difficult to handle and work in the field. Summary of the Invention [Problem to be solved by the invention]

[0011] The present application is made to solve the above-mentioned problems of the conventional technology, and aims to provide a uniform heating system for curing concrete that can reduce the initial hydration time of concrete poured inside a formwork by heating the formwork using a uniform heating system of a new structure in the construction and manufacturing of on-site cast and precast concrete such as bridge foundations such as piers and abutments, slabs of buildings such as apartments, houses, and office buildings, tunnel concrete linings, and bridge decks, girders, boxes, beams, culverts, retaining walls, piles, track slabs, concrete sleepers, etc., thereby significantly shortening the construction period of concrete structures in environments with low outside temperatures such as winter and extremely cold regions, and dramatically improving construction defects and workability.

[0012] However, the technical objectives that the present embodiment aims to achieve are not limited to those described above, and other technical objectives may exist. [Means for solving the problem]

[0013] As a technical means for achieving the above-mentioned technical object, a uniform heat generation system for concrete curing according to one embodiment of the present invention includes a plurality of unit heat generation devices each closely attached to an outer panel of a formwork for concrete production; and a power supply unit for supplying power to the plurality of unit heat generation devices, wherein the unit heat generation devices include a main body housing attached to a surface of the formwork panel and having a predetermined unit area; a gripping portion attached to an upper surface of the main body housing; and a surface heater attached to a lower surface of the main body housing. Effect of the Invention

[0014] According to the above-mentioned means for solving the problems of the present application, the installation is completed by simply attaching multiple unit heating devices to a concrete manufacturing formwork and supplying power, so the work is very easy. In addition, the heat generated by the heating system promotes the hydration and curing of concrete without the need for a separate curing cloth or steam.

[0015] In addition, the uniform heat generation system for curing concrete according to the present invention can satisfy or exceed the required quality of the cured concrete, such as strength and durability, and in particular can ensure uniform heat generation throughout, thereby ensuring uniform quality.

[0016] In addition, with the present invention, since the heat generation system only needs to be separated from the formwork panels after the concrete preparation is completed, there is no need for complicated work for separation and dismantling, and the heat generation system can be easily reused. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a diagram showing a uniform heating system for curing concrete according to one embodiment of the present invention installed on an outer panel of a formwork. [Diagram 2] 1 is a perspective view of a unit heat generating device of a uniform heat generating system for concrete curing according to an embodiment of the present invention. FIG. [Diagram 3] 1 is a perspective view of a sheet heater according to a first embodiment of the present invention; [Figure 4] 1 is a diagram showing heat distribution diagrams of a conventional unit heating device and a unit heating device according to an embodiment of the present invention; [Diagram 5] FIG. 4 is a cross-sectional view of a planar heater according to a second embodiment of the present invention. [Figure 6] FIG. 11 is a plan view of a planar heater according to a third embodiment of the present invention. [Figure 7] 4 is a diagram illustrating a configuration for fixing a unit heating device to a formwork according to an embodiment of the present invention; FIG. [Figure 8] 11 is a view illustrating a structure for fixing a unit heating device to a formwork according to another embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, the present application will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present application. However, the present application may be embodied in various different forms and is not limited to the embodiments described herein. In the drawings, parts that are not related to the description are omitted in order to clearly explain the present application, and similar parts are designated by similar reference numerals throughout the specification.

[0019] Throughout this specification, when a part is said to be "connected" to another part, this includes not only "directly connected" but also "electrically connected" via another element in between.

[0020] Throughout this specification, when a member is said to be "on" another member, this includes not only when the member is in contact with the other member, but also when the other member is between the two members.

[0021] When a part in the entire specification of the present application is described as "comprising" a certain component, this does not mean that other components are excluded, but that other components may be further included, unless otherwise specified. The terms "about," "substantially," and the like, as used throughout the specification of the present application, are used to mean a numerical value or a value close to the numerical value when the manufacturing and material tolerances inherent in the referred meaning are presented, and are used to prevent unscrupulous infringers from unfairly using the disclosure in which precise or absolute numerical values ​​are recited to aid in the understanding of the present invention. The terms "step of" or "step of" as used throughout the specification of the present application do not mean "step for".

[0022] This application relates to a uniform heat generation system for curing concrete.

[0023] FIG. 1 is a diagram showing a uniform heat generation system for concrete curing according to one embodiment of the present invention attached to the outer panel of a formwork, FIG. 2 is an oblique view of a unit heat generation device of the uniform heat generation system for concrete curing according to one embodiment of the present invention, FIG. 3 is an oblique view of a sheet heater according to a first embodiment of the present invention, FIG. 4 is a diagram showing a heat distribution diagram of a conventional unit heat generation device and a unit heat generation device according to an embodiment of the present invention, FIG. 5 is a cross-sectional view of a sheet heater according to a second embodiment of the present invention, FIG. 6 is a plan view of a sheet heater according to a third embodiment of the present invention, FIG. 7 is a diagram for explaining the configuration for fixing a unit heat generation device according to one embodiment of the present invention to a formwork, and FIG. 8 is a diagram for explaining the configuration for fixing a unit heat generation device according to another embodiment of the present invention to a formwork.

[0024] Hereinafter, a uniform heat generation system 10 for curing concrete according to one embodiment of the present invention will be described with reference to FIG.

[0025] Referring to FIG. 1, the uniform heat generation system for curing concrete (10) includes a plurality of unit heat generation devices (100) that are bonded to the surface of a concrete production formwork (20) made of metal such as aluminum or steel and generate heat while being in close contact with the surface, and a power supply unit (200) that supplies power to the plurality of unit heat generation devices (100). Exemplarily, as shown in FIG. 1, the plurality of unit heat generation devices (100) are attached to the surface of the formwork (20) in a lattice pattern, and power is supplied to the plurality of unit heat generation devices (100) through the power supply unit (200), so that the formwork (20) is heated and concrete hydration and curing can be promoted. In addition, after concrete production is completed, it is only necessary to separate the unit heat generation devices (100) from the formwork (20), so that complicated work for separation and dismantling is not required, and the uniform heat generation system for curing concrete (10) can be easily reused.

[0026] The unit heating device (100) of the present invention will now be described with reference to FIG.

[0027] As shown in the figure, the unit heating device (100) includes a main housing (110), a grip portion (111), and a planar heater (120).

[0028] The main body housing 110 may be attached to the surface of the formwork panel 20 and may have a predetermined unit area. The main body housing 110 may be formed in a plate shape, and a planar heater 120 may be located at the bottom.

[0029] The gripping portion (111) may be coupled to an upper surface of the main housing (110). Exemplarily, as shown in Fig. 2, the gripping portion (111) may be positioned at a predetermined distance in the left and right directions on the upper surface of the main housing (110), thereby allowing the unit heating device (100) to be easily attached and detached to and from the surface of the formwork (20). The left and right directions may be the 2 o'clock and 8 o'clock directions in Fig. 2.

[0030] The planar heater (120) is coupled to the lower surface of the main housing (110) and can be in close contact with the surface of the formwork (20). The planar heater (120) generates heat when power is supplied from the power supply unit (200), and can transfer the generated heat to the surface of the formwork (20) and transfer thermal energy to the concrete located inside the formwork (20). This can promote the hydration and curing of the concrete.

[0031] In addition, the unit heating device (100) may further include a heat insulating member (130) located between the main body housing (110) and the planar heater (120). The heat insulating member (130) serves to minimize the transfer of thermal energy generated from the planar heater (120) to the main body housing (110) and to efficiently transfer the thermal energy to the surface of the formwork (20).

[0032] Hereinafter, a sheet heater 120 according to various embodiments of the present invention will be described with reference to FIGS.

[0033] 3, the planar heater 120 may be formed in a rectangular plate shape and may include a central hole 122. As shown in FIG. 3, the hole 122 may be formed in a rectangular or elliptical shape, but is not limited thereto.

[0034] FIG. 4 is a diagram showing heat distribution diagrams of a conventional unit heating device and a unit heating device (100) according to an embodiment of the present invention.

[0035] Referring to FIG. 4, in the conventional unit heating device, heat is concentrated in the center, resulting in an uneven heat distribution pattern. In contrast, in the unit heating device (100) of the present invention, a perforated hole (122) is formed in the center of the planar heater (120), thereby minimizing the phenomenon of heat being concentrated and transferred to the center, thereby achieving the effect of transferring heat evenly to the formwork (20).

[0036] As another example, referring to FIG. 5, a planar heater (150) may include a conductor (154), a heating portion (156), insulation (158) and a heating plate (152).

[0037] The conductor 154 can receive power from a power supply unit 200. In this regard, the conductor 154 can increase electrical conductivity and reduce contact resistance by using silver as a main component.

[0038] The heating part (156) has a predetermined area and can generate heat by receiving power from the conductor (154). In addition, the heating part (156) is formed in a donut-shaped plate shape to minimize the concentration of heat in the center of the heating plate (152).

[0039] The insulation 158 may be formed to encase the heating plate 152 and the conductor 154. For example, the planar heater 150 may be fabricated by applying the insulation 158 to the top of the heating plate 152, mounting the conductor 154 and the heating portion 156 on the top of the applied insulation 158, and then applying the insulation 158 again to the top of the conductor 154 and the heating portion 156.

[0040] In this case, the insulation 158 serves to improve electrical heat transfer performance and prevent the sheet heater 150 from being damaged or oxidized by physical external forces. To this end, the insulation 158 may include at least one of barium titanate (BaTiO3), glass, glass-ceramic, borosilicate, and aluminosilicate, but is not limited thereto.

[0041] In addition, when the insulation (158) is applied and baked three times, it can obtain a dielectric strength of 1 KV or more at a thickness of 75 μm, and when it is applied and baked four times, it can obtain a dielectric strength of 4.5 KV or more at a thickness of 100 μm. Therefore, the application and the number of times can be selected according to the usage environment.

[0042] The heating plate 152 may be formed in a plate shape and may be located under the insulation 158. In this case, the heating plate 152 may be made of alumina, stainless steel, SUS430, 444 series, or a material having a linear expansion coefficient similar thereto.

[0043] In another embodiment, the planar heater (160) may include a lower plate (162), a heating portion (164), and an upper plate (166), as shown in FIG.

[0044] The lower plate 162 is formed in a plate shape having a predetermined area and may be made of heat-resistant PET (Polyethyleneterephthalate) material. In addition, the lower plate 162 may realize high-temperature heating by using PET, which is flexible among PET and has a high heat-resistant temperature.

[0045] The heating unit 164 is disposed on the upper part of the lower plate 162 and can generate heat by receiving power from the power supply unit 200. The heating unit 164 is made of a wire-like material such as stainless steel (STS), and the wire-like heating unit 164 can be folded and patterned to be mounted on the upper part of the lower plate. In this case, the overall shape of the heating unit 164 is formed in a donut shape, which can minimize the concentration of heat in the center of the lower plate 162.

[0046] The upper plate (166) is located on the upper part of the heat generating part (164) and may be made of the same material as the lower plate (162). Also, the upper plate (166) may be joined to the upper part of the lower plate (162) by heat fusion, but is not limited to this. In addition, the upper plate (166) and the lower plate (162) may play a role in safely protecting the heat generating part (164) by providing electrical insulation between the heat generating part (164) and the outside.

[0047] Additionally, the sheet heater (160) can also be made by coating a flexible PET material with a carbon heating element.

[0048] Hereinafter, a structure for fixing the unit heating device (100) to the formwork (20) according to an embodiment of the present invention will be described with reference to FIGS.

[0049] 7, the unit heating device (100) may further include one or more leaf spring fasteners (112) coupled to the left and right sides of the main body housing (110) respectively to be fastened to the support frame (21) of the formwork (20). Exemplarily, the leaf spring fasteners (112) may be located on the left and right sides of the main body housing (110) respectively, with one end fixed to the upper surface of the main body housing (110) and the other end extending in an upward direction outward.

[0050] When the unit heating device (100) is installed in the formwork (20), the end of the leaf spring fastening part (112) presses the lower surface of the support frame (21) of the formwork (20), so that the unit heating device (100) can be positioned so as to be in close contact with the surface of the formwork (20). This has the effect of efficiently transferring heat generated from the planar heater (120) to the surface of the formwork (20).

[0051] 8 in another embodiment, the unit heating device 100 may further include a plurality of magnet parts 140 located at a predetermined distance from each other on the lower surface of the main body housing 110. That is, the unit heating device 100 may be fixed to the surface of the mold 20 by the magnetic force of the plurality of magnet parts 140.

[0052] In this case, the multiple magnet portions (140) may be located near the front and rear edges of the main housing (110), three each, as shown in FIG. 8, but the number and locations of the magnet portions (140) are not limited thereto.

[0053] The above description of the present application is for illustrative purposes only, and a person having ordinary skill in the art to which the present application pertains should understand that the present application can be easily modified into other specific forms without changing the technical ideas or essential features of the present application. Therefore, it should be understood that the above described embodiments are illustrative in all respects and are not limiting. For example, each component described as a single form can be implemented in a distributed form, and similarly, each component described as a distributed form can be implemented in a combined form.

[0054] The scope of the present application is defined by the claims from the above detailed description, and all modifications and variations derived from the meaning and scope of the claims and their equivalent concepts should be construed as being included in the scope of the present application. [Explanation of symbols]

[0055] 10: Uniform heat generation system for concrete curing 100: Unit heating device 110: Main body housing 111: gripping portion 112: leaf spring fastening portion 120, 150, 160: Planar heater 121: Drilled hole 130: Heat insulating material 140: Magnet section 200: Power supply section 20: Formwork 21: Support frame

Claims

1. In a uniform heat generation system for concrete curing, A plurality of unit heating devices each being closely coupled to an outer panel of a concrete production formwork; and a power supply unit for supplying power to the plurality of unit heating devices, The unit heating device is a body housing attached to a surface of the form panel and having a predetermined unit area; a grip portion coupled to an upper surface of the body housing; and a sheet heater coupled to a lower surface of the main housing and having a hole formed in a center thereof,

2. 2. The uniform heat generating system for curing concrete according to claim 1, wherein the drilled holes are formed in a rectangular or elliptical shape.

3. A uniform heat generation system for curing concrete, comprising: A plurality of unit heating devices each being closely coupled to an outer panel of a concrete production formwork; and a power supply unit for supplying power to the plurality of unit heating devices, The unit heating device is a body housing attached to a surface of the form panel and having a predetermined unit area; a grip portion coupled to an upper surface of the body housing; and a surface heater coupled to a lower surface of the main housing, The planar heater comprises: a conductor receiving power from the power supply; a heating section having a predetermined area and receiving power from the conductor to generate heat; an insulation encasing the heating portion and the conductor; and A heating plate is disposed below the insulation, A uniform heat generation system for curing concrete, wherein the heating section is formed in a donut shape.

4. A uniform heat generation system for curing concrete, comprising: A plurality of unit heating devices each being closely coupled to an outer panel of a concrete production formwork; and a power supply unit for supplying power to the plurality of unit heating devices, The unit heating device is a body housing attached to a surface of the form panel and having a predetermined unit area; a grip portion coupled to an upper surface of the body housing; and a surface heater coupled to a lower surface of the main housing, The planar heater comprises: A lower plate having a predetermined area and made of a heat-resistant PET (Polyethyleneterephthalate) material; a heat generating unit disposed on the upper portion of the lower plate and receiving power from the power supply unit to generate heat; and an upper plate located above the heat generating portion and having the same material as the lower plate; The heating unit is formed by bending a wire made of stainless steel (STS) into a pattern, and has an overall shape of a donut.

5. A uniform heat generation system for curing concrete, comprising: A plurality of unit heating devices each being closely coupled to an outer panel of a concrete production formwork; and a power supply unit for supplying power to the plurality of unit heating devices, The unit heating device is a body housing attached to a surface of the form panel and having a predetermined unit area; a grip portion coupled to an upper surface of the body housing; and a surface heater coupled to a lower surface of the main housing, The uniform heat generating system for curing concrete further comprises one or more plate-shaped spring fasteners respectively coupled to the left and right sides of the main body housing and fastened to the frame of the formwork panel.

6. 6. The uniform heat generation system for curing concrete according to claim 1, further comprising a heat insulating member located between the main body housing and the sheet heater.

7. 6. The uniform heat generating system for curing concrete according to claim 1, further comprising a plurality of magnets located on a lower surface of the main body housing and spaced apart from each other by a predetermined distance.

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