KR20240069024A - Waterproof pipe of precast concrete and method of manufacturing the pipe - Google Patents

Abstract

We present precast concrete waterproof piping and its manufacturing method that can prevent safety accidents such as fires and suffocation accidents and shorten the work time for manufacturing storage containers. The piping and method include an adhesive resin layer, an inorganic particle layer, and a concrete covering layer, the inorganic particle layer is located between the adhesive resin layer and the concrete covering layer, the adhesive resin layer is present on the outer surface of the pipe, and the adhesive resin layer is inserted into a concrete plate. It includes an anchor part having an insertion part and an adhesive part fixed to the adhesive resin layer.

Description

Precast concrete waterproof pipe and method of manufacturing the same {Waterproof pipe of precast concrete and method of manufacturing the pipe}

The present invention relates to waterproof piping and a manufacturing method thereof, and more specifically, to a waterproof piping and manufacturing method in which water-proofing concrete waterproof piping is precast in a modular form and assembled on site.

Storage containers that store various liquid or solid chemicals, such as chemical storage tanks and wastewater treatment tanks, are treated with waterproofing to prevent foreign substances from entering and to prevent corrosion. The storage container is generally made of a concrete structure. If waterproofing is not done, foreign substances such as concrete components and moisture may enter and reduce the purity of the chemical substances. Waterproofing sheet construction methods such as Domestic Patent No. 10-1788130 and Domestic Patent No. 10-2310922 have been proposed. The conventional waterproof sheet method has the advantages of standardized products, a uniform and beautiful waterproof layer thickness, and shortened construction time. At this time, conventional storage containers use piping for liquid or solid chemicals to flow.

Meanwhile, conventional pipes are waterproofed on site and installed in the storage container to prevent the inflow of foreign substances and corrosion. The conventional method of attaching a waterproof panel to a concrete wall has the risk of causing a fire while the worker performs the waterproofing process, and may cause safety accidents such as suffocation due to toxic gases. In addition, the conventional method has a problem in that the working time is relatively long for curing and securing adhesive strength.

The problem to be solved by the present invention is to provide a precast concrete waterproof pipe and a manufacturing method thereof that can prevent safety accidents such as fire and suffocation accidents and shorten the work time for manufacturing storage containers.

The precast concrete waterproof pipe for solving the problem of the present invention includes an adhesive resin layer, an inorganic particle layer, and a concrete coating layer, wherein the inorganic particle layer is located between the adhesive resin layer and the concrete coating layer, and the adhesive resin layer is a pipe. It is present on the outer surface of the adhesive resin layer and includes an anchor portion having an insertion portion inserted into the concrete plate and an adhesive portion fixed to the adhesive resin layer.

In the waterproof piping of the present invention, the adhesive resin of the adhesive resin layer is a thermosetting resin containing a curing agent, and the curing agent may be one of a room temperature curing agent, a mid-temperature curing agent, or a combination thereof. Between the waterproof panel and the adhesive resin layer, an impregnated fabric layer is impregnated with the adhesive resin of the adhesive resin layer. The surface of the impregnated fabric layer may include a channel pattern that allows the adhesive resin of the adhesive resin layer to flow.

In the preferred waterproof piping of the present invention, the insertion portion of the anchor portion may include an insertion hole into which a metal rod is inserted. The insertion portion of the anchor portion may include a blunt-shaped head. The support portion of the anchor portion may be fixed to the adhesive resin layer by a fixing portion made of an impregnated fabric impregnated with the adhesive resin of the adhesive resin layer.

The method of manufacturing a precast concrete waterproof pipe to solve the problem of the present invention first forms an adhesive resin layer on the outer surface of the pipe. Thereafter, the adhesive portion of the anchor portion is fixed to the adhesive resin layer to erect the anchor portion. An inorganic particle layer is formed on the adhesive resin layer in which the anchor portion is erected. The adhesive resin layer is cured by heating the inorganic particle layer. A concrete covering layer is poured on the inorganic particle layer so that the insertion part of the anchor part is inserted.

According to the precast concrete waterproof pipe and its manufacturing method of the present invention, by utilizing the anchor part, safety accidents such as fire and suffocation can be prevented and the work time for manufacturing a storage container can be shortened.

1 to 3 are drawings for explaining the process of manufacturing a waterproof pipe according to the present invention.
Figure 4 is a diagram for explaining a modified example of the anchor portion according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. The embodiments described below may be modified into various other forms, and the scope of the present invention is not limited to the embodiments described in detail below. Examples of the present invention are provided to more completely explain the present invention to those skilled in the art. In the drawing, the representation is exaggerated for convenience of explanation. Meanwhile, terms indicating location, such as top, bottom, front, etc., are only related to what is shown in the drawing. In practice, the waterproof pipe can be used in any optional direction, and in actual use, the spatial direction changes depending on the direction and rotation of the waterproof pipe.

An embodiment of the present invention presents a precast concrete waterproof pipe and a manufacturing method thereof that can prevent safety accidents such as fire and suffocation accidents and shorten the work time for manufacturing a storage container by utilizing the anchor part. To this end, we will learn in detail about concrete waterproof pipes using anchor parts and explain in detail the manufacturing method of concrete waterproof pipes using anchor parts. An embodiment of the present invention is precast in the form of a module in order to waterproof it on site and install it in the storage container on site. The waterproof piping according to the embodiment of the present invention is suitable for storage containers that store various chemicals, such as chemical storage tanks and wastewater treatment tanks, especially storage containers for semiconductor processes in which very high purity chemicals are stored.

1 to 3 are drawings for explaining the process of manufacturing the waterproof pipe 100 according to an embodiment of the present invention. For convenience of explanation, a cross-sectional view cut along line A-A is shown separately. However, it is not a drawing in the strict sense, and there may be components not shown in the drawing for convenience of explanation.

According to FIG. 1, in the manufacturing method of the waterproof pipe (100 in FIG. 3), first, an impregnated fabric layer 10 and an adhesive resin layer 11 are sequentially stacked inside the pipe P. The pipe (P) allows various liquid or solid chemicals to flow into a storage container, and can be appropriately selected from metal, plastic, ceramic, or a combination thereof. The thickness and diameter of the pipe (P) may vary depending on the shape of the storage container of the present invention.

The impregnated fabric layer 10 is attached to the pipe P by the adhesive resin of the impregnated adhesive resin layer 11, and can be selectively applied. In some cases, the impregnated fabric layer 10 may not exist and the adhesive resin layer 11 may be formed directly on the outer surface of the pipe P. The impregnated fabric layer 10 is made of impregnated fabric and may be made of an insulating material. The insulation material is used to ensure the insulation, heat retention, and flame retardancy of the waterproof pipe 100, and ceramic fibers (eg, glass fibers) may be used. However, ceramic fibers such as glass fibers cause fatal diseases in the human body, such as respiratory diseases and skin diseases caused by dust, and act as a source of contamination inside the storage container. To replace this, insulation materials using various synthetic resins, such as polyimide, can be applied.

The impregnated fabric layer 10 may be a non-woven fabric with a mesh structure that facilitates impregnation and penetration of the adhesive resin of the adhesive resin layer 11. The non-woven fabric is made by laminating fabrics with fibers arranged in parallel or irregular directions using an adhesive or heat fusion method, without going through a weaving process. Another example of the impregnated fabric may be shaped like a felt by arranging the fibers in a parallel or irregular direction and joining them with an adhesive, etc., without going through the weaving process. The felt is made like cloth by using the fact that when steam, heat, pressure, etc. are applied to cloth or fur, the filaments become entangled and shrink with each other through felting. That is, the impregnated fabric is non-woven fabric, felt, etc. Although not shown, the felt and nonwoven fabric may be laminated in various forms. By combining the felt and nonwoven fabric, the degree to which the adhesive resin is impregnated can be further expanded.

There may be a channel pattern on the surface of the impregnated fabric layer 10 that provides a penetration path through which the adhesive resin can easily flow. At this time, the adhesive resin is injected through the flow path pattern. The channel pattern is formed throughout the impregnated fabric layer 10, and various forms are possible. By the flow path pattern, it is evenly applied to the entire impregnated fabric layer 10. At this time, the channel pattern provides an anchor effect that fixes the adhesive resin, allowing the impregnated fabric layer 10 attached to the pipe P to be maintained more firmly.

The adhesive resin forming the adhesive resin layer 11 is a thermosetting resin containing a hardener. The hardener is an agent that is added to a thermosetting resin to cause bridge bonds and harden it. There are room temperature hardeners for hardening at room temperature and heat hardeners for hardening by heating. The curing agents include amine-based curing agents, acid anhydride-based curing agents, polyamide-based curing agents, anionic polymerization-type curing agents, and multi-tube curing agents. For example, hexamethylenetetramine used in phenol resin, amines used in epoxy resin, polyamide, etc. are representative examples. Even for the same resin, the physical properties of the product vary depending on the type and amount of hardener used. Meanwhile, agents that promote curing or change heat curing reaction to room temperature curing reaction are called curing accelerators.

Vinyl ester resin, one of the examples of resins applied to the adhesive resin layer 11, is produced by an esterification reaction between an epoxy resin and an unsaturated monocarboxylic acid. Vinyl ester resin contains a polyester resin reinforced with epoxy molecules in the skeleton of the molecular chain. At this time, for curing the vinyl ester resin, a room temperature curing agent for curing at room temperature, such as MEKPO (MethylEthylKetonePerOxide), is used. In some cases, a heat curing agent for curing at medium temperature (80-130°C), such as BPO (BenzoylPerOxide), is used. The curing agent may be a room temperature curing agent, a medium temperature curing agent, or a combination thereof.

According to Figure 2, the outside of the adhesive resin layer 11 is wrapped with the anchor portion 20. One side of the anchor portion 20 is inserted into the concrete covering layer (13 in FIG. 3) to be presented later, and the other side is bonded to the adhesive resin layer 11. The anchor portion 20 includes a wave-shaped insertion portion 20a in which an insertion hole a is inserted into which a metal rod such as a rebar is inserted, and an adhesive portion 20b in which the adhesive resin layer 11 is fixed. do. The waveform shape can be any shape that forms a waveform, regardless of triangle wave, square wave, etc. The area where the adhesive portion 20b contacts the adhesive resin layer 11 is appropriately set to ensure that the anchor portion 20 is stably bonded. The adhesive portion 20b is fixed to the adhesive resin layer 11 using the fixing portion 21. The fixing part 21 can be applied in various ways, and a tape made of impregnated fabric can be used.

If the fixing part 21 is made of impregnated fabric, pressure is applied using a roller or the like so that the fixing part 21 is in close contact with the adhesive resin layer 11. The impregnated fabric in the fixing part 21 may be made of the same material as the impregnated fabric in the impregnated fabric layer 10 described above. When the fixing part 21 is pressed, the adhesive resin of the adhesive resin layer 11 penetrates into the fixing part 21. When the adhesive resin penetrates into the fixing part 21, the fixing part 21 can be firmly fixed to the adhesive resin layer 11 due to the anchor effect caused by the penetration of the adhesive resin. If necessary, after fixing the adhesive part 20b to the adhesive resin layer 11 with the fixing part 21, the adhesive resin is applied to the surface of the fixing part 21, so that the adhesive resin can be sufficiently supplied so that there is no shortage. .

As shown in the drawing, the anchor portion 20 may be fixed to the entire circumference of the pipe (P) or may be fixed to a portion of the pipe (P). The method by which the anchor part 20 is fixed to the pipe P, the period of the waveform, and the width of the waveform can be appropriately set according to the shape of the storage container of the present invention. The material of the anchor portion 20 is not necessarily limited to this, but steel material that has excellent consistency with the concrete covering layer 13 is preferable.

According to FIG. 3, when the anchor part 20 is fixed, the inorganic particle layer 12 is formed to cover the adhesive resin layer 11 and the fixing part 21. Thereafter, the adhesive resin layer 11 is cured by heating in the heating unit 30 located on the top of the inorganic particle layer 12. Heating the adhesive resin layer 11 can be done in a variety of ways, and can be done by rotating the pipe P on which the adhesive resin layer 11 is applied. The heating unit 30 heats the inorganic particle layer 12 by heating by electric resistance, heating by microwaves, etc. The heat generated by the electrical resistance is generated by the heat emitted from the heating unit 30 and heats the inorganic particle layer 12. The heating by the microwave heats the inorganic particle layer 12 with microwaves having a frequency in the range of tens of MHz to hundreds of GHz. The inorganic particles of the inorganic particle layer 12 are dielectrics that generate heat by the microwave. If the heating unit 30 is intended to heat the inorganic particle layer 12, other heating methods may be applied.

When the inorganic particle layer 12 is heated, the inorganic particle layer 12 generates heat and transfers heat to the adhesive resin layer 11. When heat is transferred to the adhesive resin layer 11, the adhesive resin layer 11 is hardened. One side of the adhesive resin layer 11 has penetrated into the impregnated fabric layer 10 and is in contact with the pipe P, and the other side is in contact with the inorganic particle layer 12. Accordingly, when the adhesive resin layer 11 is cured, the pipe P and the inorganic particle layer 12 are attached to the adhesive resin layer 11. The inorganic particle layer 12 shown in the drawing is in a state in which unattached inorganic particles have been removed after the curing is completed.

The heated inorganic particles harden the area corresponding to the cure region centered on the inorganic particles. The curing area varies depending on the curing acceleration temperature, the content of the curing agent, the type of curing agent, etc. Considering the adjacent inorganic particles, the hardened areas include overlapping hardened areas that overlap each other. The overlapping curing area increases the curing speed of the curing agent because the areas cured by the inorganic particles overlap each other. The size of the overlapping curing zone varies depending on the curing acceleration temperature, content of the curing agent, type of curing agent, average spacing of the inorganic particles, etc.

It is preferable that the inorganic particles forming the inorganic particle layer 12 are the same as those of the concrete composition. That is, the inorganic particles heated by electric resistance are preferably any one of calcium oxide (CaO), silica (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), ferric oxide (Fe ₂ O ₃ ), or mixtures thereof. . At this time, the inorganic particles heated by the microwave are one of silicon carbide and silicon carbide compounds, calcium oxide (CaO), silica (SiO ₂ ), aluminum oxide (Al ₂ O ₃ ), and ferric oxide (Fe ₂ O ₃ ) or a mixture thereof is preferably mixed. In other words, the inorganic particles may vary depending on the type of heating unit and the purpose of the waterproof pipe 100.

According to FIG. 3, the reinforcing bar structure 22 is placed on the inorganic particle layer 12. The reinforcing bar structure 22 may penetrate the insertion hole (a) of the anchor portion 20. The steel structure 22 may be designed differently depending on the shape, size, purpose of use, and shape of the anchor portion 20 of the waterproof pipe 100. Afterwards, the concrete covering layer 13 is poured as shown in the drawing to manufacture the waterproof pipe 100. In this case, the pipe (P) is firmly fixed to the concrete covering layer (13) by the anchor portion (20). Once the curing of the concrete covering layer (13) is completed, the waterproof pipe (100) is completed. In the process of forming the concrete cover layer 13, an appropriate mold (not shown) can be applied.

Figure 4 is a diagram for explaining a modified example 23 of the front anchor portion 20 according to an embodiment of the present invention. At this time, the front anchor portion 20 will be referred to FIG. 2.

According to Fig. 4, the front anchor portion 23 of the modified example includes an insertion portion 23a, a head 23b, and an adhesive portion 23c. The insertion portion 23a and the head 23b are inserted into the concrete covering layer 13, and the adhesive portion 23c is fixed to the adhesive resin layer 11 by the fixing portion 21. The head 23b has a blunt shape, which can further enhance the anchor effect. That is, the anchor portion 20 including the modified example 23 includes insertion portions 20a and 23a and adhesive portions 20b and 23c, and in order to increase the bonding force between the pipe P and the concrete covering layer 13, Additional shapes may be added, for example heads 23b. If the anchor part 23 as in the modified example is used, the arrangement of the reinforcing bar structure 22 may be different.

The waterproof pipe 100 according to an embodiment of the present invention is later moved to the site, assembled, and the waterproof pipe is installed in a storage container, thereby significantly shortening the work time. In addition, the hardener can cause safety accidents such as respiratory, skin, and suffocation accidents, and even has various problems such as fire due to a flame reaction, and can be a burden in manufacturing costs. However, since hardeners are not used in actual sites, safety accidents and fires can be prevented, and manufacturing costs can be reduced.

Above, the present invention has been described in detail with preferred embodiments, but the present invention is not limited to the above embodiments, and various modifications can be made by those skilled in the art within the scope of the technical idea of the present invention. possible.

10; Impregnated fabric layer 11; Adhesive resin layer
12; inorganic particle layer 13; concrete cover layer
20; anchor part
100; Waterproof pipe P; pipe

Claims (13)

It includes an adhesive resin layer, an inorganic particle layer, and a concrete coating layer, wherein the inorganic particle layer is located between the adhesive resin layer and the concrete coating layer,
The adhesive resin layer exists on the outer surface of the pipe,
A precast concrete waterproof pipe comprising an anchor part on the adhesive resin layer having an insertion part inserted into the concrete plate and an adhesive part fixed to the adhesive resin layer. The precast concrete waterproof piping according to claim 1, wherein the adhesive resin of the adhesive resin layer is a thermosetting resin containing a hardener, and the hardener is one of a room temperature hardener, a medium temperature hardener, or a combination thereof. The precast concrete waterproof piping according to claim 1, comprising an impregnated fabric layer between the waterproof panel and the adhesive resin layer in which the adhesive resin of the adhesive resin layer is impregnated. The precast concrete waterproof pipe according to claim 3, wherein the surface of the impregnated fabric layer includes a flow path pattern that allows the adhesive resin of the adhesive resin layer to flow. The precast concrete waterproof pipe according to claim 1, wherein the insertion portion of the anchor portion includes an insertion hole into which a metal rod is inserted. The precast concrete waterproof pipe according to claim 1, wherein the insertion portion of the anchor portion includes a blunt-shaped head. The precast concrete waterproof pipe according to claim 1, wherein the support portion of the anchor portion is fixed to the adhesive resin layer by a fixing portion made of an impregnated fabric impregnated with the adhesive resin of the adhesive resin layer. Forming an adhesive resin layer on the outer surface of the pipe;
Fixing the adhesive portion of the anchor portion to the adhesive resin layer to erect the anchor portion;
forming an inorganic particle layer on the adhesive resin layer on which the anchor part is erected;
curing the adhesive resin layer by heating the inorganic particle layer; and
A method of manufacturing a precast concrete waterproof pipe comprising the step of pouring a concrete covering layer on the inorganic particle layer so that the insertion portion of the anchor portion is inserted. The method of claim 8, wherein the adhesive resin of the adhesive resin layer is a thermosetting resin containing a hardener, and the hardener is one of a room temperature hardener, a medium temperature hardener, or a combination thereof. . The method of claim 8, wherein an impregnated fabric layer is impregnated with the adhesive resin of the adhesive resin layer between the pipe and the adhesive resin layer. The method of claim 10, wherein the surface of the impregnated fabric layer includes a flow path pattern that allows the adhesive resin of the adhesive resin layer to flow. The method of claim 8, wherein the adhesive portion of the anchor portion is fixed to the adhesive resin layer by a fixing portion made of an impregnated fabric impregnated with the adhesive resin of the adhesive resin layer. The method of claim 8, wherein the heating by the heating unit is performed by electric resistance, microwaves, or a combination thereof.

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