KR102044171B1 - Applying apparatus of adhesive composition for a pipe and method for connecting pipes using the same - Google Patents

Abstract

The present invention relates to an adhesive applying device of a pipe and a connection method of the pipe using the same. The present invention, the adhesive (S) is accommodated, the adhesive coating container 210 for impregnating the pipe (10) to the adhesive (S) to apply the adhesive (S) to the surface of the pipe (10); An adhesive supply unit 220 supplying an adhesive S to the adhesive applying container 210; A pipe holder 230 installed in the adhesive application container 210 and having a pipe insertion hole 232 formed therein; A support unit 240 installed below the pipe holder 230 and supporting the end of the pipe 10 passing through the pipe insertion hole 232; And it provides an adhesive coating device 200 of the pipe including a liquid level adjusting means 250 to maintain a constant level of the adhesive (S) accommodated in the adhesive coating container 210, and a pipe connecting method using the same. . According to the present invention, it is possible to apply the adhesive by a simple method through impregnation (immersion), the human error (Human error) is prevented has the effect of having excellent adhesiveness and leakage prevention and the like. In addition, according to the present invention, it is possible to uniformly apply the adhesive, it has a high economic efficiency and the like by reducing the labor cost.

Description

Adhesive coating device for pipes and pipe connection method using same {APPLYING APPARATUS OF ADHESIVE COMPOSITION FOR A PIPE AND METHOD FOR CONNECTING PIPES USING THE SAME}

The present invention relates to an adhesive coating device for pipes and a method for connecting a pipe using the same, for example, an adhesive coating device for pipes capable of uniformly applying an adhesive to a pipe surface such as fire extinguishing pipes in a simple manner, and using the same The present invention relates to a pipe connecting method capable of connecting pipes so as to have excellent adhesion and leakage prevention properties.

Tubing provides a fluid flow path, which is widely used in many industries. Pipes have various sizes (diameters and lengths) and shapes according to the industrial field to which they are applied, and in most cases are cylindrical and consist of plastics or metals.

For example, in the case of fire-extinguishing facilities, cylindrical plastic pipes are mainly used for corrosion resistance and light weight. Piping for the fire-extinguishing facility is embedded in the basement or concrete walls of the building or exposed to the outside, which is divided into a main pipe, a standing pipe and a branch pipe branched from the main pipe or the standing pipe according to the size of the building.

In general, the connection between pipes is a connection device such as a joint pipe and an assembly member, and various tools. For example, in the case of connecting the main pipe and the branch pipe in the fire extinguishing facility, the main pipe and the branch pipe are inserted into the joint pipes such as T-shape, and then connected through the fastening of bolts. In addition, when connecting pipes, airtightness of the joints must be ensured. To this end, in most cases, sealing materials such as O-rings are packed.

For example, Republic of Korea Patent Publication No. 10-1190837, Republic of Korea Patent Publication No. 10-2009-0004408 and Republic of Korea Utility Model Publication No. 20-2013-0004571 and the related technology is presented.

However, the conventional pipe connection has a problem that the work takes a long time because the number of parts of the connection device and the number of tools used. In addition, when a sealing material such as an O-ring is used for the airtightness, it is difficult to completely guarantee the airtightness due to aging. In this case, when high pressure fire water flows, for example, in a fire extinguishing facility, there is a problem in that water leakage occurs at the connection part and breaks.

On the other hand, in connecting the pipe, a method of applying (gluing) the adhesive by applying an adhesive by a method such as brushing or spray coating may be considered. However, in this method, an uncoated portion may be generated due to a human error of an operator, or a coating surface may not be uniform and a difference in coating amount and coating thickness may occur. In this case, as well as the coupling force (adhesiveness) between the pipes is poor, in particular, the uncoated portion forms a gap there is a problem that the leak occurs.

Republic of Korea Patent Publication No. 10-1190837 Republic of Korea Patent Publication No. 10-2009-0004408 Republic of Korea Open Utility Model Publication No. 20-2013-0004571

Accordingly, the present invention can be applied to the pipe by a simple method while the human error (Human error) can be prevented to have an excellent adhesiveness and leakage prevention, such as an adhesive coating device of the pipe and a pipe connecting method using the same The purpose is to provide.

The present invention to achieve the above object,

An adhesive applying container for receiving an adhesive and impregnating the pipe with the adhesive to apply the adhesive to the surface of the pipe;

An adhesive supply unit supplying an adhesive to the adhesive application container;

A pipe holder installed in the adhesive applying container and having a pipe insertion hole formed therein;

A support unit installed below the pipe holder and supporting an end of the pipe passing through the pipe insertion hole; And

It provides an adhesive coating device of the pipe comprising a liquid level control means for maintaining a constant level of the adhesive contained in the adhesive application container.

According to an exemplary embodiment, the support unit,

A support for supporting the end of the pipe;

And an inner surface coating preventing member installed on the support and inserted into an inner surface of the pipe to prevent the adhesive from being applied to the inner surface of the pipe.

According to another embodiment, the adhesive coating device of the pipe according to the present invention further comprises a constant temperature holding means for maintaining a constant temperature of the adhesive contained in the adhesive coating container, the adhesive contained in the adhesive coating container is 500 to 1,200 cP It may have a viscosity of.

In addition, the present invention,

A method of connecting a pipe connecting a first pipe and a second pipe of a plastic material, the process of applying and connecting an adhesive to at least one selected from the first pipe and the second pipe using the adhesive coating device of the present invention. It provides a connection method of the pipe including.

According to the present invention, it is possible to apply the adhesive by a simple method through impregnation (immersion), the human error (Human error) of the operator is prevented has the effect of having excellent adhesiveness and leakage prevention and the like.

In addition, according to the present invention, it is possible to uniformly apply the adhesive, it has a high economic efficiency and the like by reducing the labor cost.

BRIEF DESCRIPTION OF THE DRAWINGS It is process drawing for demonstrating the piping connection method which concerns on 1st Embodiment of this invention.
2 is a sectional view of a pipe connecting portion connected by a pipe connecting method according to a second embodiment of the present invention.
3 is a flowchart for explaining a pipe connecting method according to a third embodiment of the present invention.
4 is a sectional view of a pipe connecting portion connected by a connecting method according to a third embodiment of the present invention.
5 is a flowchart for explaining a pipe connecting method according to a fourth embodiment of the present invention.
6 is a flowchart for explaining a pipe connecting method according to a fifth embodiment of the present invention.
7 is a configuration diagram of an adhesive applying device according to the first embodiment of the present invention.
8 is a configuration diagram of an adhesive applying device according to a second embodiment of the present invention.
9 is a photograph showing a state in which the tensile strength test for the connection specimen according to an embodiment of the present invention.
10 is a photograph after the tensile strength test for the connection specimen according to an embodiment of the present invention.
11 is a photograph after the fracture test on the connection specimen according to an embodiment of the present invention.

As used herein, the term "and / or" is used in a sense including at least one or more of the components listed before and after. As used herein, the term "one or more" means one or two or more. In the present invention, terms such as “first”, “second”, “third”, “one side” and “other side” are used to distinguish one component from another component, and each component is the term. It is not limited by them.

According to the first aspect, the present invention provides an adhesive applying device capable of applying an adhesive to the surface of a pipe when connecting the pipe. According to a second aspect, the present invention provides a pipe connecting method using the adhesive applying device. According to a third aspect, the present invention provides an adhesive for pipe connection that can be usefully used in the first and second aspects of the present invention. Moreover, this invention provides the manufacturing method of the said adhesive agent for pipe connection according to 4th aspect.

An embodiment of the present invention will be described with reference to the accompanying drawings. The accompanying drawings show exemplary embodiments of the invention, which are provided merely to assist in understanding the invention. In the accompanying drawings, the thickness may be enlarged in order to clearly represent each layer and area, and the technical scope of the present invention is not limited by the thickness, size and / or ratio of each component, etc. shown in the drawings. .

In describing the embodiments of the present invention, detailed descriptions of related well-known general functions or configurations are omitted. In addition, below, the connection method of the pipe according to the present invention will be described first, and the adhesive coating device 200 of the pipe according to the present invention will be described. And it describes together the manufacturing method of the pipe connection adhesive (S) and the pipe connection adhesive (S) according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS It is process drawing for demonstrating the piping connection method (it abbreviates as "connection method" hereafter) concerning the 1st Embodiment of this invention. 2 is a sectional view of a pipe connecting portion (connection structure) connected by a connecting method according to a second embodiment of the present invention.

[1] First Embodiment (Connection Method)

First, referring to FIG. 1, according to the first embodiment, the connection method according to the first embodiment of the pipe connection adhesive S (hereinafter referred to as “adhesive agent”) on the surfaces 10a and 20a of the pipes 10 and 20. And abbreviated to ". &Quot;

More specifically, referring to Figure 1, when connecting the first pipe 10 and the second pipe 20, the adhesive (S) to at least one selected from the first pipe 10 and the second pipe (20). Apply, but apply the adhesive (S) to the surface (10a) (20a) of these connections. For example, an appropriate amount of the adhesive S is applied to the outer surface 10a of the first pipe 10 and / or the inner surface 20a of the second pipe 20. 1 illustrates a state in which an adhesive S is applied to one outer surface 10a of the first pipe 10. Thereafter, the first pipe 10 and the second pipe 20 are inserted, and then the adhesive S is cured (dry) and connected (adhesive). The curing (drying) of the adhesive S may be selected from natural curing at room temperature (natural drying), and / or thermal curing using heat such as hot air or a heater.

In the present invention, the pipe 10, 20, that is, the first pipe 10 and the second pipe 20 is to provide a flow path of the fluid, which is not particularly limited as long as the plastic pipe. The first pipe 10 and the second pipe 20 may be formed of a plastic material, for example, a cylindrical shape or a polygonal shape. In the drawings, the tubular pipes 10 and 20 are illustrated.

In addition, the first pipe 10 and the second pipe 20 may be selected from a length pipe (straight pipe), and / or a connection pipe connected to the length pipe. At this time, the length of the pipe has a predetermined length, which means that the fluid flows in the longitudinal direction of the pipe (10, 20) (for example, a straight pipe to flow in a straight line). In addition, the connecting pipe is a pipe connected to the length pipe as described above, which may be selected from the direction of the flow path, the change of flow rate, and / or the joint pipe for branching the flow path (or flow rate).

According to one embodiment, the first pipe 10 may be selected from a length pipe (straight pipe) having a predetermined length as illustrated in the figure. In addition, the second pipe 20 is not particularly limited as long as it is connected to the first pipe 10, which is a length pipe (straight pipe) having an inner diameter of the first pipe 10 or larger or approximately the same diameter, or It may be selected from a joint having one or more joints 21, 22, 23. In the figure, the second pipe 20 is illustrated as a joint pipe.

The second pipe 20 may be selected from a joint pipe having two or more joint parts 21, 22, 23, and in the drawing, three joint parts 21, 22, 23 are provided. Branches illustrate the T-shaped joint. That is, the drawing illustrates a T-shaped joint pipe having the first joint portion 21, the second joint portion 22, and the third joint portion 23 as the second pipe 20. At this time, the joint pipe as the second pipe 20 includes a first joint part 21 having an inner diameter of the first pipe 10 or having an inner diameter which is about the same or larger than that of the first pipe part 10. One side of the pipe 10 may be inserted and connected. As described above, the adhesive S is applied to one outer surface 10a of the first pipe 10 and / or the inner surface 20a of the first joint part 21, so that the first pipe 10 ) And the first joint portion 21 may be connected through adhesion.

According to a preferred embodiment, the adhesive S is uniformly applied to at least one outer surface 10a of the first pipe 10 with a predetermined width (width). In the present invention, "uniformly apply" and "uniformly apply" mean that the coating amount of the adhesive agent S is constant (quantitative) in the entire coating surface area, and the coating thickness is uniformly applied. The adhesive S may optionally be applied to the inner surface 20a of the second pipe 20, that is, to the inner surface 20a of the first joint portion 21. The adhesive S is applied through dipping (immersion), which will be described later with reference to the adhesive applying device 200 according to the present invention.

In the present invention, the first pipe 10 and the second pipe 20, as mentioned earlier in the material is a plastic pipe made of plastic (synthetic resin) as the main material, which is rigid (rigid) It includes flexible. The first pipe 10 and the second pipe 20 are concretely chlorinated polyvinyl chloride pipes (hereinafter referred to as " CPVC ") as the main material (hereinafter referred to as " CPVC "). Tubes "), polyvinyl chloride tubes (hereinafter referred to as" PVC ") as polyvinyl chloride (hereinafter referred to as" PVC "), polyethylene (hereinafter referred to as" PE ") Polyethylene tube (hereinafter referred to as "PE tube") and / or polypropylene tube (hereinafter referred to as "PP") as a main material (hereinafter referred to as "PP tube") And the like).

According to one embodiment, the first pipe 10 and the second pipe 20 may be selected from the fire pipe used in the fire extinguishing facility. In this case, the present invention can be usefully applied to the connection of the digestive pipes during the installation or repair (replacement) of the digestive pipes in the fire extinguishing facility. The first pipe 10 and the second pipe 20 may be selected from, for example, a CPVC pipe and / or a PVC pipe that are widely used as fire extinguishing pipes. In addition, the first pipe 10 and the second pipe 20 may be made of the same material. For example, when the first pipe 10 is a CPVC pipe, the second pipe 20 may also be a CPVC pipe.

[2] Second Embodiment (Connection Method)

Referring to FIG. 2, the connection method according to the present invention further includes forming a leakage preventing layer 30 on an outer surface of the connection portion A of the pipes 10 and 20 according to the second embodiment. . Specifically, in the connection method according to the second embodiment of the present invention, the adhesive S is applied to the surfaces 10a and 20a of the first pipe 10 and / or the second pipe 20 to be connected (adhesive). The second step of forming a leakage preventing layer 30 on the outer surface of the connecting portion (A) of the first pipe 10 and the second pipe 20 connected through the first process, and do.

The said 1st process is as having demonstrated 1st Embodiment. The second process is a process of forming a leakage preventing layer 30 on the outer surface of the connection portion (A) of the first pipe 10 and the second pipe 20, in the present invention, the leakage preventing layer 30 is There is no particular limitation as long as it can prevent leakage. That is, in the present invention, the leakage preventing layer 30 is applied to surround the outer surface of the connection portion (A) of the first pipe 10 and the second pipe 20 as shown in Figure 2 can prevent the leakage Is good.

The leak prevention layer 30 may be formed by applying a resin composition. In addition, the resin composition for forming the leakage preventing layer 30 may have foamability. Specifically, the leak prevention layer 30 in the present invention may be composed of a resin film layer formed by the application of the resin composition, or may be composed of a foam foam layer formed by the foaming of the foamable resin composition.

[3] Third Embodiment (Connection Method)

3 is a process diagram for explaining a connection method according to a third embodiment of the present invention, and FIG. 4 is a cross-sectional view of a pipe connection portion (connection structure) connected by the connection method according to the third embodiment of the present invention.

3 and 4, according to the third embodiment, the connection method according to the present invention is applied by applying an adhesive S to the surfaces 10a and 20a of the pipes 10 and 20 (gluing). And a second step of installing (gluing) the leakage preventing member 100 on the connection portion A of the first pipe 10 and the second pipe 20 connected through the first process. Include.

The leakage preventing member 100 is installed on the connection portion (A) of the first pipe 10 and the second pipe (20). The leakage preventing member 100 includes a first pipe member 110 and a second pipe member 120 formed integrally extending from the first pipe member 110. At this time, the second tube member 120 has an inner diameter larger than the inner diameter of the first tube member 110. The leakage preventing member 100 is made of plastic, which is preferably the same material as the pipes 10 and 20. Specifically, the leakage preventing member 100 is the same material as the first pipe 10 and the second pipe 20, it is preferable that the material such as CPVC, PVC, PE and / or PP as listed above. For example, when the first pipe 10 and the second pipe 20 is a CPVC pipe, the leakage preventing member 100 may be made of a CPVC material. For another example, the leakage preventing member 100 may use a molded, manufactured by recycling waste resources (waste) such as CPVC, PVC, PE and / or PP. In addition, the inner diameter of the first pipe member 110 is substantially the same as the outer diameter of the first pipe 10, the inner diameter of the second pipe member 120 is almost the outer diameter of the second pipe (20, 21). The same may be configured.

The leakage preventing member 100 has the same cross-sectional shape as the pipes 10 and 20 to be in close contact with and coupled to the pipes 10 and 20. For example, when the pipes 10 and 20 have a cylindrical shape, the leakage preventing member 100 may have a cylindrical shape according to the first embodiment. Specifically, the leakage preventing member 100 may include a cylindrical first tube member 110, and a cylindrical second tube member 120 formed integrally extending from the first tube member 110.

[4] Fourth Embodiment (Connection Method)

5 is a flowchart for explaining a connection method according to a fourth embodiment of the present invention. 5 shows another embodiment of the leakage preventing member 100.

Referring to FIG. 5, the leakage preventing member 100 may have a structure divided into two or more pieces in the longitudinal direction (horizontal direction in the drawing) according to the second embodiment. Specifically, as shown in FIG. 5, the leakage preventing member 100 may include an upper half member 100A and a lower half member 100B as a divided structure. At this time, the upper half member (100A) and the lower half member (100B) has a semi-cylindrical shape, respectively, the cylindrical leakage preventing member 100 is formed by the combination of these (100A) (100B).

More specifically, the upper half member 100A includes a semi-cylindrical first upper tube member 110A and a second upper tube member 120A which is formed integrally extending from the first upper tube member 110A. The lower half member 100B may include a semi-cylindrical first lower tube member 110B and a second lower tube member 120B extending and integrally formed from the first lower tube member 110B. have. In addition, a cylindrical first tube member 110 is formed by the combination of the first upper tube member 110A and the first lower tube member 110B, and the second upper tube member 120A and the second lower tube member ( The cylindrical second tube member 120 may be formed by the coupling of 120B).

The leakage preventing member 100 may have two or more divided structures. In FIG. 5, two split structures including an upper half member 100A and a lower half member 100B are illustrated, but according to another exemplary embodiment, the leakage preventing member 100 may be divided into three or four or more. Can have

On the other hand, when the leakage preventing member 100 has a cylindrical shape, it is fitted to the first pipe 10 before the first pipe 10 and the second pipe 20 are fitted (connected) to each other. Can be. That is, the first pipe 10 may be first inserted into and penetrated into the leakage preventing member 100, and then the first pipe 10 may be fitted into the second pipe 20 to be connected (adhesive). Thereafter, the leakage preventing member 100 is bonded to the connection portion (A) of the first pipe 10 and the second pipe (20). At this time, the first pipe member 110 of the leak prevention member 100 is fitted (glued) to the first pipe 10, the second pipe member 120 of the leak prevention member 100 is the second pipe ( 10) is fitted (glued).

An adhesive S may be used to plan the connection (adhesion) of the leakage preventing member 100 and the pipes 10 and 20. Specifically, the adhesive (S) is applied to the outer surface of the connection portion (A) of the pipe (10, 20) and / or the inner surface (100a) of the leak prevention member 100 by the leak prevention member 100 and the pipe The abutting surface of (10) (20) can be made to adhere | attach. As such, when the leakage preventing member 100 is installed (adhesive), the adhesive force (coupling force) between the first pipe 10 and the second pipe 20 can be further improved with excellent leakage preventing ability.

In addition, when the leakage preventing member 100 includes the upper half member 100A and the lower half member 100B of the semi-cylindrical shape as shown in FIG. 5, this is the first pipe 10 and the second pipe 20. Can be installed after fitting (gluing). Specifically, first the first pipe 10 and the second pipe 20 is fitted (glued), and then the upper half member 100A and the lower half member 100B are connected to the first pipe 10 and the second pipe. It is attached to the connection portion (A) of (20). At this time, the connection (adhesion) of the leakage preventing member 100 and the pipes 10 and 20, that is, to plan the connection (adhesion) of the upper and lower half members 100A, 100B and the pipes 10 and 20. In the above, the adhesive S can be used as described above. The leakage preventing member 100 is the same half type as that shown in FIG. 5, that is, the semi-cylindrical upper half member 100A and the lower half member, considering the ease of installation on the connection portion A. It may be desirable to include (100B).

[5] Fifth Embodiment (Connection Method)

6 is a cross-sectional view of a pipe connecting portion (connection structure) connected by a connecting method according to a fifth embodiment of the present invention.

Referring to FIG. 6, the connection method according to the present invention further includes forming a leakage preventing layer 30 on the outer surface of the connection portion A of the pipes 10 and 20 according to the fifth embodiment. . Specifically, in the connection method according to the fifth embodiment of the present invention, the adhesive S is applied to the surfaces 10a and 20a of the first pipe 10 and / or the second pipe 20 to be connected (adhesive). The first step to install, and the installation (adhesion) of the leakage preventing member 100 on the outer surface of the connection portion (A) of the first pipe 10 and the second pipe 20 connected through the first process. And a third step of forming the leakage preventing layer 30 on the outer surface of the leakage preventing member 100.

The first step and the second step are as described in the third embodiment. The third process is a process of forming a leak prevention layer 30 on the outer surface of the leak preventing member 100, and the leak preventing layer 30 is not particularly limited as long as it can prevent leakage. As shown in FIG. 6, the leakage preventing layer 30 may be coated to surround the outer surface of the leakage preventing member 100 so as to prevent leakage. This leakage preventing layer 30 is as described in the second embodiment. Specifically, the leak prevention layer 30 may be composed of a resin film layer formed by application and curing of the resin composition, or may be composed of a foam foam layer formed by foaming the foamable resin composition.

[6] adhesive applicators

7 is a block diagram of the adhesive coating device 200 according to the first embodiment of the present invention.

Adhesive coating apparatus 200 according to the present invention is used for the application of the adhesive (S) at the time of connection of the pipe (10) 20, which is specifically the first pipe 10 and the second pipe (20). It is used to apply the adhesive (S) to one or more selected from). The adhesive S is applied by impregnation (immersion) on the surfaces 10a and 20a of the pipes 10 and 20 through the applicator 200. Here, the surfaces 10a and 20a of the pipes 10 and 20 are selected from the inner surface 20a and / or the outer surface 10a of each of the pipes 10 and 20, for example, the first pipe It is selected from the outer surface 10a of (10). Hereinafter, in describing the adhesive agent applying apparatus 200 according to the present invention, a case where the adhesive agent S is applied to the first pipe 10 as a length pipe (straight pipe) will be described as an example.

Referring to FIG. 7, the adhesive applying apparatus 200 according to the present invention includes an adhesive coating container 210 in which an adhesive S is accommodated; An adhesive supply unit 220 supplying an adhesive S to the adhesive applying container 210; A pipe holder 230 installed in the adhesive application container 210; A support unit 240 installed below the pipe holder 230; And liquid level adjusting means 250 to maintain the level (L) of the adhesive (S) is constant.

The application container 210 may have a shape such as a cylindrical shape or a polygonal shape, for example, and it may be sufficient to accommodate a certain amount of the adhesive S. In addition, according to the exemplary embodiment, the cover 215 may be installed on the upper portion of the application container 210 so as to be open / closed. The lid 215 can be opened and closed for example by a hinge. The cover 215 may be coupled (sealed) to the upper portion of the application container 210 to have a sealability to prevent volatilization (loss) of the adhesive S.

According to the invention, the adhesive 10 is applied to the pipe 10 by the method of impregnation (immersion). That is, one side of the pipe 10 is impregnated in the adhesive S accommodated in the application container 210 to apply the adhesive S to the surface of the pipe 10. As described above, according to the present invention, when applied through impregnation, it is advantageous in uniform application (coating amount and coating thickness constant) of the adhesive S, ease of application work and prevention of loss of the adhesive S, and in particular, adhesion and leakage prevention. It is suitable for the improvement of the properties.

In the method of apply | coating the adhesive agent S, methods, such as application | coating (such as brushing) and / or spray coating, can be considered. However, such a method may generate an uncoated portion due to a human error of an operator, or may cause local differences in application amount and application thickness without being uniform for the entire application surface.

On the contrary, in the case of applying through impregnation (immersion) according to the present invention, uniform coating (coating amount and coating thickness constant) is possible over the entire coating surface, and above all, human error of the operator can be prevented. By preventing and uniformly applying such a human error, the adhesive force and the leakage preventing property of the pipe 10 and the connection part A are improved. In addition, the application method through the impregnation is time-saving and simple compared to the method of applying (such as brushing) or spray coating can reduce labor costs and the like. In addition, the loss of the adhesive S can be prevented. That is, in the case of applying (such as brushing) or spray coating, the adhesive (S) flows down to the floor and is lost, or may be sprayed to other parts other than the pipe 10, the loss may occur, the application container 210 Loss can be prevented when applying through impregnation to the adhesive S contained therein.

The adhesive (S) is not particularly limited as long as it has adhesive force. The adhesive S may be selected from, for example, liquid phases such as acrylic, urethane, epoxy, PVC and / or silicone. The adhesive S preferably has a viscosity of 500 to 1,200 cP (ceti-poise; centipoise) as an appropriate viscosity. In the case of having such a viscosity, it is preferable to prevent dormant errors and uniform coating, which will be described later through the description of the adhesive S according to the present invention.

The adhesive supply part 220 supplies and supplements the adhesive S when the adhesive S in the application container 210 is reduced by the application of the adhesive S. FIG. Specifically, the adhesive (S) maintains a certain level in the application container (210), when the water level is lowered by one or two or more times the application of the adhesive (S), adhesive supply unit 220 Is injected and supplemented with a certain amount of adhesive (S) in the application container 210 to maintain a constant level.

The adhesive supply unit 220 may include a supply container 221 containing the adhesive S and at least one supply pipe 222 supplying the adhesive S of the supply container 221 into the application container 210. Include. One side of the supply pipe 222 is coupled to the lower end of the supply container 221, and the other side of the supply pipe 222 is charged into the application container 210. The supply container 221 and the supply pipe 222 are coupled in a removable (combined and separated) structure. In addition, the supply container 221 is replaceable.

The pipe holder 230 holds the pipe 10 charged into the application container 210. A pipe insertion hole 232 is formed in the pipe holder 230. The pipe 10 charged into the coating container 210 is inserted and penetrated through the pipe insertion hole 232, and then is in close contact with the support unit 240 to be supported. The pipe 10 is held (held) by the insertion of the pipe insertion hole 232.

At least one or two or more pipe insertion holes 232 may be formed in the pipe holder 230. In this case, when there are two or more pipe insertion holes 232, each pipe insertion hole 232 may have a different size. In the drawings, three pipe insertion holes 232 having different sizes are illustrated. Thereby, the adhesive agent S can be apply | coated to the piping 10 of various standards from which size (outer diameter) differs. In addition, the pipe insertion hole 232 may have a shape of, for example, circular, oval and / or polygonal, which is slightly larger than or almost the same size (diameter) as the size (outer diameter) of the pipe 10 to be inserted. It can have

According to the exemplary embodiment of the present invention, the pipe holder 230 may include a pipe inserting portion 234 on one side and a height maintaining portion 236 on the other side. The pipe insertion hole 232 is formed in the pipe insertion part 234. The height maintaining part 236 extends upward from the pipe insertion part 234, which is installed at a position higher than the pipe insertion part 234 as shown in FIG. 7. In addition, a supply pipe 222 of the adhesive supply unit 220 is installed below the height maintaining unit 236. That is, an injection port 222a of the supply pipe 222 is installed below the height maintaining part 236. As shown in FIG. 7, as the height retaining portion 236 is installed at a position higher than the pipe insertion portion 234, the injection port 222a is positioned at a position higher than the adhesive S level in the application container 210. Is installed. Accordingly, the supply of the adhesive S may proceed more smoothly than the case where the injection port 222a is immersed in the adhesive S in the application container 210.

The support unit 240 is installed below the pipe holder 230, which is installed at a predetermined distance from the pipe holder 230. The end of the pipe 10 is supported in close contact with the upper surface of the support unit 240. More specifically, the support unit 240 supports and stops the end of the pipe 10 passing through the pipe insertion hole 232 to prevent the pipe 10 from being charged further down. By the position of the support unit 240, the application length of the adhesive (S) to be impregnated and coated in the pipe 10 can be determined. That is, the separation distance between the upper surface of the support unit 240 and the liquid level L (see (a) of FIG. 7) of the adhesive S is impregnated in the pipe 10, and the application length of the adhesive S to be coated is Can be. In the present invention, the support unit 240 is not particularly limited as long as it supports the end of the pipe 10 passing through the pipe insertion hole 232.

According to the first embodiment of the present invention, the support unit 240 may include a support 242 in close contact with the end of the pipe (10). The support 242 may be selected from, for example, a plate or plate of a plate shape, and / or a post of a column. The support 242 may be composed of, for example, a frame including a frame and a wire including a wire provided inside the frame. The frame may have a skeletal shape such as a circular frame or a square frame according to the shape of the application container 210, which may be coupled to an inner wall surface of the application container 210. The wire may be arranged and installed inside a frame in a grid or net structure, which may also have a predetermined elasticity. The support 242 may be, for example, the bottom 214 of the application container 210. At this time, the end of the pipe 10 passing through the pipe insertion hole 232 is in close contact with the bottom portion 214 of the application container 210 is supported.

According to the second embodiment of the present invention, the support unit 240 may include a support 242 and a spacer 244 installed under the support 242. At this time, the spacer 244 is installed between the support 242 and the bottom 214, which spaces the support 242 from the bottom 214 at a predetermined interval. The spacer member 244 may be selected from, for example, an elastic body, which illustrates a spring as the elastic body in the figure. By the elastic spacer member 244, the pipe 10 can elastically enter and exit the pipe insertion hole 232, so that the application of the impregnation may be easy due to less force applied. The spacer member 244 is one or plural, for example, the number of the pipe insertion holes 232 may be the same.

According to the third embodiment of the present invention, the support unit 240 may include a support 242 and an inner surface preventing member 245 installed on the support 242. At this time, the inner surface coating preventing member 245 is inserted close to the inner surface of the pipe 10, to prevent the adhesive (S) is applied to the inner surface of the pipe (10). Such an inner surface coating preventing member 245 is useful, for example, in the case of applying the adhesive S to only the outer surface 10a of the first pipe 10 in FIG.

In addition, the side surface of the inner surface coating preventing member 245 may be tapered to facilitate the introduction of the pipe 10. That is, as shown in Figure 7, the inner surface coating preventing member 245 has a diameter of the upper end than the lower end, its side may be formed to be tapered (taper). The inner surface coating preventing member 245 may be selected from, for example, an elastic material, and in particular, may be selected from rubber, silicone, a synthetic elastomer, and / or a synthetic foam. The inner surface coating preventing member 245 is one or plural, which may be equal to the number of pipe insertion holes 232.

In FIG. 7, a spacer 244 installed on the bottom 214 of the application container 210, a support 242 installed on the spacer 244, and an inner surface installed on the support 242. There is shown a support unit 240 comprising an application barrier 245. And the spacer member 244 and the inner surface coating preventing member 245 is shown in the form of a plurality (three) each.

In addition, according to the fourth embodiment of the present invention, the support unit 240 may include a support 242 and an outer coating preventing member (not shown) installed on the support 242. At this time, the outer surface coating preventing member is in close contact with the outer surface (10a) of the pipe 10, to prevent the adhesive (S) is applied to the outer surface (10a) of the pipe (10). For example, referring to FIG. 1, the outer surface coating preventing member may apply the adhesive S only to the inner surface 20a of the second pipe 20 when the second pipes 20 and 21 are applied. Useful in the case. There is one or a plurality of such outer coating preventing member, which may be equal to the number of the pipe insertion hole (232).

8 is a block diagram of the adhesive coating device 200 according to the second embodiment of the present invention.

Referring to FIG. 8, in accordance with a fifth embodiment of the present invention, the support unit 240 includes a support 242, a spacer 244 disposed below the support 242, and the support 242. And an impregnation tank 246 into which the spacer member 244 is interpolated. That is, the support unit 240 may further include an impregnation tank 246, and the spacer 244 and the support 242 may be sequentially inserted and installed inside the impregnation tank 246. In this case, as illustrated in FIG. 8, the spacer 244 may be formed of an elastic body (spring), and the support 242 installed on the spacer 244 may be formed of a circular plate. . In addition, as illustrated in FIG. 8, an inner surface coating preventing member 245 may be installed on the support 242.

The impregnation tank 246 may have a structure in which the adhesive S may be freely passed through the inside and the outside thereof. The impregnation tank 246 may be selected from, for example, a network body having a plurality of through holes. The pipe 10 penetrating the pipe insertion hole 232 is introduced into the impregnation tank 246 is impregnated (soaked) in the adhesive (S). As shown in FIG. 8, the impregnation tank 246 is installed below the pipe insertion hole 232, which is also equal to the number of pipe insertion holes 232. The impregnation tank 246 may be partitioned inside the application container 210 to minimize interference. For example, in FIG. 8, three pipe insertion holes 232 are illustrated. In this case, two pipes 10 are inserted by inserting the pipes 10 into the pipe insertion holes 232 located at the left and the center in FIG. 8. In the case of impregnating at the same time, it is partitioned by the impregnation tank 246 can minimize the interference between each other.

8, the impregnation tank 246 installed on the bottom 214 of the application container 210, the spacer 244 installed in the impregnation tank 246, and the spacer 244 are installed on the spacer member 244. A support unit 240 is shown including a plate-like support 242 and an inner surface coating preventing member 245 provided on the support 242. In this case, as shown in FIG. 8, the spacer 244, the support 242, and the inner surface preventing member 245 may be sequentially inserted and installed in the impregnation tank 246. In addition, a plurality of (three) support units 240 having different sizes may be installed in the application container 210.

In addition, referring to FIG. 7, the liquid level adjusting means 250 allows the liquid level L of the adhesive S accommodated in the application container 210 to be kept constant. That is, the liquid level control means 250 is to replenish the adhesive (S) from the adhesive supply portion 220 when the liquid level (L) in the application container 210 is reduced by impregnating the adhesive (S) one or more times The liquid level L is kept constant. In FIG. 7, (a) is a state before application | coating of the adhesive agent S, and (b) shows the state which has been impregnated-coated.

The liquid level regulating means 250 may include a water level controller used in various industries. The liquid level regulating means 250 may comprise a balltop valve according to one embodiment. Referring to FIG. 7, the liquid level regulating means 250 includes an on / off valve 252, a balltop 254 floating on the surface of the adhesive S, and an on / off valve 252 and a balltop 254. It may include an operation unit 256 for connecting. In this case, the open / close valve 252 may be installed in the supply pipe 222. Accordingly, when the liquid level L is reduced by the impregnation application of the adhesive S, the ball top 254 is lowered, and the opening and closing valve 252 is opened to supply and replenish the adhesive S from the adhesive supply 220. do. And when the liquid level (L) is increased by the replenishment of the adhesive (S), the ball top 254 is raised to open and close the valve 252 to block the supply of the adhesive (S). By this operation, the liquid level L can always be kept constant.

In the present invention, the liquid level adjusting means 250 is not particularly limited as long as the liquid level L of the adhesive S is kept constant. The liquid level adjusting means 250 is provided in the supply pipe 222 according to another embodiment, the opening and closing valve 252 for opening and closing the supply pipe 222, and the liquid level for detecting the liquid level (L) in the application container 210 It may include a sensor and a control unit for controlling the opening and closing valve 252 according to the liquid level (L) detected by the liquid level detection sensor. At this time, the control unit, if the liquid level (L) detected by the liquid level sensor is less than a predetermined value (set value) to open the on-off valve 252 electronically so that the adhesive (S) is replenished, the liquid level (L) is one When the stationary value (set value) is reached, the on / off valve 252 is closed to control the replenishment of the adhesive S to be blocked.

In addition, the coating apparatus 200 according to the present invention may further include a constant temperature maintaining means 280 according to another embodiment. Referring to Figure 8, the constant temperature holding means 280 is installed in the application container 210, which maintains a constant temperature of the adhesive (S) contained in the application container 210. The constant temperature holding means 280 can be maintained at a temperature of, for example, 15 ° C to 30 ° C. As mentioned above, the adhesive S may have a viscosity of 500 to 1,200 cP. The viscosity of the adhesive S may vary with temperature. In particular, in the winter or summer season, the viscosity of the adhesive (S) may vary depending on the temperature change. The constant temperature maintaining means 280 may maintain a constant temperature to prevent a change in viscosity, that is, to always have a suitable viscosity (500 ~ 1,200 cP) even in winter or summer.

The constant temperature maintaining means 280 is not particularly limited as long as it can maintain the temperature of the adhesive S at a constant (for example, 15 ° C. to 30 ° C.). The constant temperature maintaining unit 280 may be selected from a heating wire or a heat exchanger, and may include, for example, an electric heating wire (heating in winter) and / or a water-cooling cooler (heating in summer).

The constant temperature maintaining means 280 is provided in the application container 210 according to another embodiment, a heat exchanger for maintaining a constant temperature of the adhesive (S), and senses the temperature of the adhesive (S) in the application container 210 And a controller for controlling the heat exchanger according to the temperature sensed by the temperature sensor. In this case, when the temperature sensed by the temperature sensor is less than or above a predetermined value (for example, 15 ° C. to 30 ° C.), the control unit operates the heat exchanger to always maintain a constant value (setting value).

Adhesive applying apparatus 200 according to the present invention described above can be applied to the adhesive (S) by a simple method through the impregnation, which also implements uniform application and ease of application work, and the purpose through one impregnation It can be made to have an application length to make. In addition, it is possible to prevent application of the inner surface and to maintain a proper viscosity by maintaining a constant temperature. Each of the components constituting the adhesive applying apparatus 200 according to the present invention is selected from materials such as metal and / or non-metal materials (synthetic resin, etc.), which does not adversely affect the adhesive (S), and also What is necessary is just to be unaffected by adhesive agent S. FIG.

In addition, the adhesive applying device 200 according to the present invention can be used without being limited to the place where the connection of the pipes 10 and 20 is required, or through the portable. The adhesive applying device 200 according to the present invention is, for example, portable.

On the other hand, in the present invention, it is preferable that the adhesive (S) to use the adhesive (S) described below. The adhesive (S) of the present invention described below promotes excellent adhesiveness and leakage preventing property, and at the same time improves workability and the like. Hereinafter, the adhesive agent S according to this invention is demonstrated.

[7] glues (S)

According to the present invention, the adhesive S includes a bonding solvent S1 and a plastic S2 dissolved in the bonding solvent S1. At this time, the bonding solvent (S1) is to dissolve at least one selected from the surface (10a, 20a) of the first pipe 10 and the second pipe 20, and the surface of the leakage preventing member 100. Is selected.

The plastic (S2) is dissolved in the bonding solvent (S1) and acts as the main adhesive for the connection (adhesion) of the pipes 10, 20 and the leakage preventing member 100. In addition, the bonding solvent S1 dissolves the surfaces 10a and 20a of the pipes 10 and 20 and / or the surface 100a of the leakage preventing member 100 to improve adhesion. That is, the bonding solvent S1 dissolves the surfaces of the plastic material pipes 10 and 20 and / or the plastic material leakage preventing member 100, and forms a dissolving solution in which these surfaces are dissolved. In addition, the surface dissolving solution acts as an auxiliary adhesive, and together with the surface dissolving solution and the plastic (S2) dissolving solution, thereby improving adhesion. Moreover, the said adhesive agent S has a viscosity of 500-1,200 cP according to this invention.

According to one embodiment, the bonding solvent S1 is a hydrocarbon-based organic solvent, which is applied to the pipes 10 and 20 to dissolve the surfaces 10a and 20a of the pipes 10 and 20. And it is selected from what melt | dissolves the said plastic S2 with this. In the present invention, the bonding solvent (S1) is not particularly limited as long as it has the above function (dissolving power). Specifically, in the present invention, the bonding solvent (S1) is not particularly limited as long as it has a dissolving power to the pipe (10) 20 and the plastic (S2), which is the pipe 10, 20 and the plastic (S2) of Depending on the material (type), it can be selected from a suitable one (having a dissolving power).

The bonding solvent S1 may be preferably selected from organic solvents such as furan and / or ketone. In the present invention, the furan system may be one that can be named furan. Specifically, the furan system includes a five-membered heterocyclic compound (C ₄ H ₄ O) having one oxygen atom (O) in the ring, the heterocyclic compound (C ₄ H ₄ O) 1 It may be selected from furan (furan), a derivative thereof, and the like, which contain two or more. As the furan system, one or more selected from, for example, tetrahydrofuran (THF), dihydrofuran and derivatives thereof may be used. In addition, the ketone is at least one selected from acetone, methyl ethyl ketone (MEK), methyl isobutyl ketone (MIBK) and butyl methyl ketone (BMK) Can be used.

As the bonding solvent (S1), one or a mixture of two or more selected from organic solvents such as furan-based and / or ketone-based may be used. Bonding solvent (S1), Preferably it may contain at least a furan system, More preferably, it is good to contain at least tetrahydrofuran (THF) among the above-mentioned organic solvents.

As mentioned above, the pipe 10, 20 in the present invention is a plastic material, which may be composed of a material such as CPVC or PVC. Tetrahydrofuran (THF) has a higher solubility in CPVC and PVC than other organic solvents such as ketones. In addition, tetrahydrofuran (THF) has a low boiling point and high volatility. Accordingly, the tetrahydrofuran (THF) dissolves the surface of the pipe (10, 20) made of CPVC or PVC material in a short time to improve the adhesion, and with the high volatility, work time, that is, curing of the adhesive (S) (drying) Can shorten the time. Therefore, according to the preferred embodiment of the present invention, the pipes 10 and 20 are made of CPVC or PVC, and the bonding solvent S1 preferably contains tetrahydrofuran (THF).

In addition, the said bonding solvent (S1) can use the mixed solvent which mixed a furan system and a ketone system. In this case, the furan system may be used as the main solvent, and the ketone system may be used as the auxiliary solvent. As mentioned above, furan systems, such as tetrahydrofuran (THF), have very high solubility with respect to CPVC and PVC. However, since the furan system is rather expensive, it can be mixed with ketones such as acetone and methyl ethyl ketone (MEK), which are inexpensive in consideration of economical efficiency. As described above, when the bonding solvent S1 is used as a mixed solvent of furan and ketone, it is used by mixing at a weight ratio of 80 to 88: 2 to 10 (furan: ketone = 80 to 88: 2 to 10). Good to do. At this time, if the amount of the ketone-based is too small, the economical improvement effect due to the mixed use thereof may be insignificant. If the amount of the ketone is used too much, the viscosity may be increased, or the adhesion may be reduced due to the decrease in the amount of the furan system (THF, etc.). That is, if the furan system (THF, etc.) is too small, the adhesiveness may be lowered due to the lower surface solubility of the pipe (10, 20).

The plastic (S2) is to be dissolved by the bonding solvent (S1), which acts as a main adhesive for the adhesion of the pipe 10, 20 as mentioned above. In the present invention, the plastic (S2) is not particularly limited as long as the plastic (S2) is dissolved by the bonding solvent (S1) and has adhesive strength. The plastic S2 may be selected from the same kind of plastic (synthetic resin) as the material of the pipes 10 and 20. The plastic S2 can be selected from, for example, CPVC, PVC, PE and / or PP, and the like, preferably from CPVC and PVC, and the like.

In addition, the plastic (S2) is selected from the above, such as CPVC and PVC, a powder having a predetermined particle size may be used. Powdered plastic (S2) is dissolved in the bonding solvent (S1) and is present in the liquid phase in the adhesive (S). In addition, the plastic (S2) may be used that is separated from the waste pipe in consideration of economical and environmental friendliness. For example, waste plastic powder obtained by pulverizing waste CPVC pipes, waste PVC pipes, or the like can be used as waste pipes discarded in a fire extinguishing facility.

Adhesive (S) according to the invention is a liquid phase comprising the bonding solvent (S1) and the plastic (S2) as described above, which also has a viscosity of 500 to 1,200 cP as described above. In the present invention, the viscosity is a value measured at room temperature. In addition, in the present invention, the room temperature may vary depending on the season, but it may be, for example, in the range of -25 ℃ to 40 ℃. The viscosity is a value measured at the temperature of the work site when the piping 10, 20 is connected, and may be, for example, a value measured at a temperature of -15 ° C to 35 ° C or a temperature of 15 ° C to 30 ° C. have.

In the present invention, the viscosity of the adhesive (S) may act as an important factor for the coating properties (coating amount and coating thickness, etc.), adhesiveness and leakage prevention properties. Specifically, when the viscosity of the adhesive S is too low as less than 500 cP, the fluidity is strong after impregnation of the pipes 10 and 20, and, for example, flows downward to cause loss or application amount (and application thickness). ) Can be low adhesiveness and leakage prevention. In addition, when the viscosity of the adhesive (S) is too high exceeding 1,200 cP, the viscosity is strong, it may be difficult to uniformly and quantitative application locally after impregnation.

In applying the adhesive (S), as well as the formation of a uniform thickness layer over the entire surface of the pipe (10) 20, the uncoated portion should not occur. In particular, in the case where the uncoated portion is generated, as well as poor adhesion, the uncoated portion may form a gap and leaks may occur. Accordingly, in applying the adhesive (S), it is very important to form a uniform thickness layer and to prevent the uncoated portion from occurring. For this purpose, the adhesive (S) has a viscosity of 500 to 1,200 cP according to the present invention. It is good to have. That is, according to the present invention, when the adhesive (S) has a viscosity of 500 to 1,200 cP, it can be seen that the uncoated portion does not occur while having a uniform thickness layer, and thus has excellent adhesiveness and leakage preventing property. there was. In addition, the loss of the adhesive S can be prevented. In view of this point, it is more preferable that the adhesive S has a viscosity of 700 to 1,050 cP, or 800 to 1,000 cP.

In addition, the plastic (S2) may be included in 5 to 20% by weight based on the total weight of the adhesive (S). At this time, if the content of the plastic (S2) is too low as less than 5% by weight, as well as low adhesion and leakage resistance, as well as relatively high content of the bonding solvent (S1) may cause poor coating due to viscosity decrease have. And when the content of the plastic (S2) is too high exceeding 20% by weight, the content of the bonding solvent (S1) is relatively low solubility, and the viscosity is too high can be difficult to uniformity and quantitative coating.

In consideration of this point, the plastic (S2) is preferably included in 10 to 15% by weight, more preferably 10 to 14% by weight, or 11 to 14% by weight based on the total weight of the adhesive (S). It is good to be. According to a preferred embodiment of the invention, when the plastic (S2) is included in the range of 10 to 15% by weight (more preferably, 10 to 14% by weight, or 11 to 14% by weight), excellent adhesion and leakage As well as having prevention properties, there is a significant decrease in the possibility that uncoated portions are generated by having an appropriate viscosity, and excellent coating properties (uniform and quantitative coating).

The bonding solvent (S1) may be included in 75 to 95% by weight based on the total weight of the adhesive (S). At this time, when the content of the bonding solvent (S1) is too low as less than 75% by weight, the viscosity is high, solubility may be lowered and the adhesiveness may be lowered. That is, the bonding solvent S1 dissolves the surface of the pipes 10 and 20 as well as dissolving the plastic S2. When the content of the bonding solvent S1 is low, the adhesion to the surface may be reduced. And when the content of the bonding solvent (S1) is too high, exceeding 95% by weight, the viscosity is too low, and the content of the plastic (S2) is relatively low, the adhesion and leakage prevention properties may be lowered.

In consideration of this point, the bonding solvent (S1) is preferably included in 80 to 92% by weight based on the total weight of the adhesive (S), more preferably 82 to 90% by weight, 82 to 89% by weight, or It is good to include from 85 to 88% by weight. According to a preferred embodiment of the invention, the bonding solvent (S1) is included in the range of 80 to 92% by weight (more preferably 82 to 90% by weight, 82 to 89% by weight, or 85 to 88% by weight) In this case, as well as having excellent adhesion and leakage prevention properties, has an appropriate viscosity to have excellent coating properties.

In addition, the adhesive (S) according to the present invention may further include one or more selected from polyvinylacetate (PVA, Polyvinyl acetate), thickeners and dyes in addition to the bonding solvent (S1) and plastic (S2).

The polyvinyl acetate (PVA) may improve the adhesion. Polyvinylacetate (PVA) not only has adhesiveness per se but also shares vinyl groups with CPVC, PVC, etc., for example, and has good miscibility with them. Thereby, adhesiveness can be improved. In addition, polyvinylacetate (PVA) can increase the viscosity. Polyvinylacetate (PVA) may be included in 0.1 to 5% by weight based on the total weight of the adhesive (S). At this time, if the content of polyvinyl acetate (PVA) is too low as less than 0.1% by weight, the degree of adhesion improvement according to its use may be insignificant. And when the content of polyvinyl acetate (PVA) is too high exceeding 5% by weight, the viscosity may be too high.

In consideration of this point, the polyvinyl acetate (PVA) is preferably included in 0.2 to 3% by weight based on the total weight of the adhesive (S). In addition, polyvinylacetate (PVA) may be added after mixing in a ketone solvent. Specifically, first, a solution obtained by dissolving the plastic (S2) and the bonding solvent (S1) is obtained, and then a mixed solution of polyvinylacetate (PVA) and a ketone solvent (acetone, MEK, MIBK, etc.) can be added and mixed. have.

The thickener is for increasing the viscosity, which is selected from alcohols, water and the like. Alcohols can be selected from, for example, methanol, ethanol, isopropyl alcohol and the like. In this case, alcohol is used when the main solvent of the bonding solvent S1 is furan-based (THF, etc.), and water is used when the main solvent of the bonding solvent S1 is ketone-based (MEK, etc.). Furan compounds (THF, etc.) are soluble in alcohols, ketones (MEK, etc.) are soluble in water. For example, when the plastic (S2) is CPVC and the bonding solvent (S1) is THF, when alcohols are added thereto, THF, which is well soluble in alcohols, may be dissolved in alcohols to elute CPVC to increase viscosity. That is, the viscosity increases due to the difference in solubility. The same applies to ketones (MEK, etc.) and water.

The thickener may be included in 0.1 to 8% by weight based on the total weight of the adhesive (S). At this time, when the content of the thickener is too low as less than 0.1% by weight, the degree of viscosity improvement according to its use may be insignificant. And when the content of the thickener is too high exceeding 8% by weight, the viscosity is too high may cause coating failure. In consideration of this point, it is preferable that the thickener is included in an amount of 0.2 to 5% by weight based on the total weight of the adhesive (S).

In addition, the dye may be added as needed, it may be used liquid or fine particles. Such dye may be included, for example, 0.01 to 2% by weight based on the total weight of the adhesive (S).

On the other hand, the plastic (S2) may be used that is separated from the waste pipe in consideration of economical and environmental friendliness. This will be described through the manufacturing method of the present invention.

The method for producing an adhesive S according to the present invention includes a first step of obtaining a plastic (S2) powder obtained by pulverizing a waste pipe, the bonding solvent (S1) as described above, and the plastic (S2) obtained in the first step. A second step of dissolving the plastic (S2) powder in the bonding solvent (S1) by mixing the powder; and a third step of removing the solids contained in the solution by filtering the solution obtained in the second step. Steps.

First, in the first step, the discarded waste pipe is collected, cut and pulverized to a predetermined particle size. At this time, the waste pipe is a waste pipe made of plastic as described above, for example, it may be selected from waste CPVC pipe, waste PVC pipe, etc. discarded after being used as a fire pipe. This waste pipe is cut to an appropriate size and then pulverized to have a predetermined particle size through a grinder to obtain waste plastic powder.

The waste plastic powder is not particularly limited, but may have an average particle size of 20 to 500 mesh, for example, 100 to 300 mesh, or 150 to 200 mesh. It can have an average particle size of. At this time, the waste plastic powder may be advantageous as the particle size is smaller in terms of dissolving power, but if it is too small, it may not be preferable for the removal of solids in the filtering process (third step).

In the second step, the waste plastic powder is dissolved in the bonding solvent S1 by mixing the bonding solvent S1 and the waste plastic powder obtained in the first step. At this time, heat may be added during dissolution. Specifically, the bonding solvent (S1) and the waste plastic powder may be mixed and then dissolved while applying heat. The waste plastic powder is based on the total mixed weight of the waste plastic powder and the bonding solvent (S1) (waste plastic powder + bonding solvent (S1)), for example, 5 to 25% by weight, 8 to 25% by weight, or 8 to It can be used at 22% by weight.

When heat is applied as above, the dissolving power of the waste plastic powder may be increased and the separation efficiency may be increased. Specifically, in the waste plastic powder, solids such as dyes are present in addition to the plastics. When heat is applied, the dissolving power of the plastics is increased, and the plastics and the solids (dyes, etc.) can be easily separated. For example, it can be dissolved while applying heat until boiling occurs at a temperature of 70 ℃ ~ 130 ℃. This second step (warmed dissolution) can be carried out, for example, for 20 minutes to 2 hours, or 30 minutes to 1 hour. At this time, it may vary depending on the content of the plastic (S2) powder, but if the heat applied is too low as less than 70 ℃ degree of dissolution improvement may be insignificant, agglomerated mass of plastic and solids (dye, etc.) may occur. And when it is too high exceeding 130 degreeC, the volatilization amount (loss amount) of the bonding solvent S1 may become large.

According to one embodiment, when the content of the waste plastic powder is about 5 to 7% by weight of 70 ℃ ~ 90 ℃, about 8 to 12% by weight is 90 ℃ ~ 100 ℃, about 12 to 18% by weight In the case of 100 ℃ to 110 ℃, about 18 to 25% by weight can be dissolved while applying a heat of 110 ℃ to 130 ℃. When heat is applied in the above range according to each content of the waste plastic powder, it is possible to minimize the volatilization amount (loss amount) of the bonding solvent (S1) without increasing the dissolving power and not causing the aggregated mass of plastic and solids (dye, etc.). Can be.

In the third step, the dissolved solution obtained through the second step as described above, that is, the mixed solution of the bonding solvent (S1) and the plastic (S2) is filtered. In general, the pipe 10, 20 is made of plastic as a main material, it is manufactured by further adding additives such as dyes, heat stabilizers and / or release agents. Accordingly, the plastic (S2) powder obtained by pulverizing the waste pipe contains impurities such as dyes and additives, and these impurities may be present as solids in the solution. Such solids may be adversely affected by adhesiveness or leakage prevention, so it may be removed. Thus, filtering removes the solids contained in the solution. Such solids can be removed through sieve manure using a filter having, for example, 200 to 500 mesh, or 250 to 350 mesh.

In addition, after proceeding to the third step as described above may further proceed to the fourth step of lowering the viscosity by adding the bonding solvent (S1) to have a proper viscosity, or in some cases add a thickener. Through this fourth step, adjustment is made to satisfy the viscosity range. In addition, the manufacturing method of the adhesive (S) according to the present invention may further include the step of adding additional components. Such additional components include polyvinylacetate (PVA) as an adhesion improving agent as described above; Alcohols and / or water as thickeners; And one or more selected from dyes and the like. In addition, the additional component may be added after the first step (milling), preferably after the second step (dissolution) or the third step (filtering).

The adhesive S described above is uniformly applied to the pipes 10 and 20 through impregnation, and is usefully used for connection between the pipes 10 and 20. The adhesive (S) as described above allows for a firm connection (adhesion) of the pipe 10, 20, which can also effectively improve the leakage preventing ability.

Hereinafter, the Example of this invention is illustrated.

The following example relates to the adhesive S as described above, which is provided for the technical effect of the adhesive S. In addition, the following examples are provided by way of example only to help understanding of the present invention, whereby the technical scope of the present invention is not limited.

[Examples 1 to 5]

CPVC, which is widely used as a raw material for digestive pipes, was purchased, and then mixed and dissolved in a solvent to prepare an adhesive. THF was used as a solvent. At this time, as shown in Table 1, the content of CPVC was increased according to each example. In the following [Table 1], the content of each component is based on the entire adhesive (percentage, wt%).

[Examples 6 to 12]

In the same manner as in Example 1, but using a mixture of THF (main solvent) and MEK (secondary solvent) as a solvent to prepare an adhesive. In addition, PVA was added as an adhesion improving agent or thickener was further added according to each Example. In this case, first, a solution obtained by dissolving CPVC in a solvent (THF) was obtained, followed by mixing and adding MEK, PVA, and a thickener according to each example. In addition, in the case of PVA was added after dissolving in MEK, the thickener was used isopropyl alcohol aqueous solution of 80wt%. Specific composition (component and content) according to each embodiment is as shown in the following [Table 1].

<Viscosity Measurement>

For the adhesive according to each example, the viscosity at about 25 ° C. was measured using a Brockfield dial viscometer (spindle No. 5, 50 rpm). The results are shown in the following [Table 1].

<Workability (applicability) evaluation>

The adhesive according to each embodiment is applied to the surface of the CPVC pipe by applying a brush, the evaluation of the applicability based on the following criteria are shown in the following [Table 1].

* Poor: If the viscosity is too low to cause a drop, or if the viscosity is too high to brush

* Moderate: When a small amount of dripping occurs on the surface of CPVC pipe due to its low viscosity or when it is necessary to apply several times because of high viscosity

* Good: When there is no dripping and the brush is easy to apply

<Evaluation of Compressive Strength>

A CPVC pipe and a fitting (joint pipe) for the digestive pipe were prepared, and the adhesive according to the embodiments was applied to one outer surface of the CPVC pipe, and then the fitting was connected (adhesive). Then, the compressive strength (kgf) was evaluated by applying a load until the CPVC tube was pulled out or broken by using a universal testing machine for the connection specimen according to each embodiment. The results are shown in the following [Table 1]. Under the present circumstances, the adhesive agent of Example 1, Example 5, and Example 12 was inferior to applicability | paintability, and was not evaluated.

                 <Composition of Adhesives and Evaluation Results of Physical Properties>
Remarks Composition of Adhesive (Unit: Weight%)
Property evaluation result CPVC THF MEK PVA Thickener Viscosity
(cP) Applicability Compressive strength
(kg _f ) Example 1
1.43 98.57 - - - 5.8 Bad - Example 2
4.29 95.71 - - - 32.6 usually 267.064 Example 3
7.14 92.86 - - - 53.3 usually 351.414 Example 4
11.43 88.57 - - - 544.1 Good 1073.761 Example 5
14.29 85.71 - - - 1216.1 Bad - Example 6
11.19 86.71 2.10 - - 660.8 Good 1049.761 Example 7
11.03 85.52 3.45 - - 785.4 Good 1035.025 Example 8
10.65 82.68 4.85 1.82 - 987.2 Good 1064.974 Example 9
10.32 80.00 6.26 3.42 - 1081.4 usually 1180.357 Example 10
11.19 86.65 - 0.60 1.56 962.8 Good 1217.644 Example 11
11.43 73.62 12.81 - 2.14 1067.1 usually 846.117 Example 12
10.32 80.00 - - 9.68 1325.3 Bad -
1) CPVC: Chlorinated Polyvinyl Chloride
2) THF: Tetrahydrofuran
3) MEK: methyl ethyl ketone
4) PVA: Polyvinyle Acetate
5) Thickener: 80wt% Isopropyl Alcohol
6) Viscosity (cP): 25 ° C, Brockfield Dial Viscometer (spindle No. 5, 50rpm)

As shown in Table 1, when comparing Examples 1 to 5, it was found that the viscosity increases as the content of CPVC increases. At this time, when the content of CPVC is too low or high, the viscosity was too low or high, it was found that the application is difficult (poor), as in Example 4, the content of CPVC is about 11% by weight or more, the viscosity at 500cP or more It was found to have good applicability and excellent compressive strength (adhesive force) of 1,000 kgf or more.

In addition, looking at Examples 6 to 11, when using more MEK as a solvent, the viscosity increases as the content of MEK increases, it can be seen that the compressive strength (adhesive strength) is lowered due to the decrease of the content of THF. In particular, as in Example 11, when the content of THF is too low, it can be seen that the compressive strength (adhesive force) is lowered. And as in Examples 8 to 10, PVA was found to increase the compressive strength (improving the adhesion). However, if the content of the PVA is too much, it can be seen that the viscosity increases.

In addition, looking at Examples 10 to 12, it can be seen that the viscosity is increased when the alcohol (isopropyl alcohol) is added. This is because CPVC has high solubility in THF but little solubility in alcohol (isopropyl alcohol), so that dissolved CPVC is eluted again.

[Examples 13 to 17]

First, a waste CPVC pipe used as a fire pipe was prepared as a waste pipe, finely cut it, and then ground using a grinder. Thereafter, waste CPVC powder having an average particle size of about 180 mesh size was obtained through a sieving. Next, the waste CPVC powder and the solvent THF were put into a heating vessel and dissolved while applying heat. At this time, the content of the waste CPVC powder was changed according to each embodiment, the boiling (boiling) was confirmed by visual observation and the temperature at the time of boiling was measured. The results are shown in the following [Table 2]. In the following [Table 2], the content of the waste CPVC powder is based on the mixing of the waste CPVC powder and THF as a whole (percentage, wt%).

After dissolving the dissolved solution slightly while applying heat as above, in order to remove solid impurities such as dye, the dissolved solution was filtered through a 300 mesh sieve, and left to stand at room temperature. Next, an appropriate amount of isopropyl alcohol was added to the solution thus obtained as a thickener, and finally, the adhesive having recycled the waste CPVC tube was obtained as having a viscosity (measured at about 25 ° C.) between 900 and 950 cP.

                <Evaluation result of boiling point by content of waste PVC> Remarks Content of Waste CPVC Boiling Point (b.p) Viscosity
(@ 25 ℃) Example 13
2 wt% 72 ℃ 902.7 Example 14
5 wt% 82 ℃ 904.1 Example 15
10% by weight 95 ℃ 937.4 Example 16
15 wt% 106 ℃ 931.4 Example 17
20 wt% 116 ℃ 947.7

As shown in [Table 2], it can be seen that the boiling point varies depending on the content of the waste CPVC powder. That is, the boiling point was increased as the content of the waste CPVC powder increased.

Through these results (boiling point rise), when recycling the waste CPVC pipe, considering the boiling point according to the content of waste CPVC powder, dissolving at the appropriate temperature (optimum temperature) minimizes the volatilization of the solvent (THF) At the same time, it was found that the solubility could be increased.

With respect to the adhesive (waste CPVC content 15% by weight) according to Example 16, a tensile strength test, a breakdown test after the breakdown pressure test, and the breakdown test were performed as follows, and the results are shown in the following [Table 3]. In addition, among the Examples 1 to 12, the tensile strength, the pressure resistance test, and the breakdown test after the pressure resistance test were carried out in the same manner with respect to the adhesive agent according to Example 10 showing the best results, and the results are shown in the following [Table 3]. Together.

<Tensile Strength Evaluation>

A CPVC pipe and a fitting (joint pipe) for the digestive pipe were prepared, an adhesive was applied to one outer surface of the CPVC pipe, and the fitting was connected (glued). Then, the tensile strength (kgf) was evaluated by increasing until the CPVC pipe or fittings are broken or missing using a universal testing machine.

<Pressure test>

In the same manner as above, first, the CPVC pipe and fittings (joint pipes) for the digestive pipe were prepared, and then an adhesive was applied to one outer surface of the CPVC pipe, and then the fitting was connected (glued). Water was injected and lasted for 2 minutes at internal pressure (water pressure) of 60 kgf (approximately 6.0 MPa) to evaluate water leakage or deformation.

<Breakdown test after pressure test>

For the specimens subjected to the internal pressure test as described above, the pressure of breaking was continuously evaluated until the CPVC tube was broken, and the pressure was continuously raised.

                     <Property Evaluation Results> Remarks The tensile strength
(kgf) Withstand pressure test Fracture Test
(kgf) Example 10 1422.198 No leakage
No deformation 104.54 Example 16 1356.427 No leak
No deformation 105.13

9 is a photograph showing the tensile strength test, and FIG. 10 is a photograph after the tensile strength test of the connecting specimen according to Example 16. FIG. In addition, Figure 11 is a photograph after the fracture test, the left side is a connection specimen according to Example 10, the right side is a photograph according to Example 16.

As shown in [Table 3] and the attached Figures 10 to 11, the adhesive according to each embodiment was found to have excellent results in the tensile strength, pressure resistance test and fracture test, in particular waste pipe (closed CPVC pipe In the case of Example 16, which was recycled), the tensile strength was 1,300 kgf or more.

10: first piping 20: second piping
10a, 20a: surface 30: leakage prevention layer
100: leak prevention member 200: adhesive coating device
210: adhesive application container 220: adhesive supply
230: piping holder 240: support unit
250: liquid level adjusting means 280: constant temperature holding means
A: Connection part S: Adhesive

Claims (5)

Adhesive application container 210 is accommodated, and the adhesive (S) to impregnate the pipe (10, 20) to apply the adhesive (S) to the surface of the pipe (10) (20);
An adhesive supply unit 220 supplying an adhesive S to the adhesive applying container 210;
A pipe holder 230 installed in the adhesive application container 210 and having a pipe insertion hole 232 formed therein;
A support unit 240 installed at a lower side of the pipe holder 230 and supporting an end of the pipe 10 and 20 passing through the pipe insertion hole 232; And
It includes a liquid level control means 250 to maintain the level (L) of the adhesive (S) accommodated in the adhesive application container 210 is constant,
The adhesive supply unit 220,
Supply container 221 containing the adhesive (S),
Supplying the adhesive (S) of the supply container 221 into the adhesive coating container 210, one side is coupled to the lower end of the supply container 221, the other side of the supply pipe inserted into the adhesive coating container 210 (222),
The pipe holder 230,
A pipe insertion part 234 having a pipe insertion hole 232 formed therein;
And a height maintaining part 236 extending upwardly from the pipe inserting part 234, wherein the height maintaining part 236 is installed at a position higher than the pipe inserting part 234.
The supply pipe 222 of the adhesive supply unit 220 is installed below the height maintaining unit 236, the injection port 222a of the supply pipe 222 is the level of the adhesive (S) in the adhesive application container 210 Is installed at a position higher than (L),
The pipe insertion hole 232 is a plurality,
The plurality of pipe insertion holes 232, the adhesive coating device 200 of the pipe (10), characterized in that the size is different from each other.
The method of claim 1,
The support unit 240,
A support 242 supporting the ends of the pipes 10 and 20;
It is installed on the support 242, inserted into the inner surface of the pipe 10, 20, preventing the inner surface coating to prevent the adhesive (S) is applied to the inner surface of the pipe (10, 20) Adhesive coating device (200) of the pipe (10), characterized in that it comprises a member (245).
The method of claim 1,
Adhesive coating device 200 of the pipe 10, 20,
Further comprising a constant temperature maintaining means 280 for maintaining a constant temperature of the adhesive (S) accommodated in the adhesive application container 210,
Adhesive (S) accommodated in the adhesive coating container 210 has an adhesive coating device of the pipe (10) (20), characterized in that it has a viscosity of 500 to 1,200 cP.
The method of claim 1,
The pipe 10, 20 is a plastic material fire pipe used in the fire extinguishing facility,
The adhesive (S),
82 to 88.57% by weight of a bonding solvent for dissolving the surface of the plastic material fire pipe;
10 to 14% by weight of the plastic dissolved in the bonding solvent; And
0.2 to 5% by weight of a thickener for increasing the viscosity,
Has a viscosity of 500 to 1,200 cP,
The bonding solvent includes a furan system,
Adhesive thickening device of the pipe (10) (20), characterized in that the thickener comprises alcohols.
The connecting method of the pipes 10 and 20 connecting the first pipe 10 and the second pipe 20 of the plastic material,
At least one selected from the first pipe 10 and the second pipe 20 by using the adhesive coating device 200 of the pipe 10, 20 according to any one of claims 1 to 4. Connection method of the pipe (10) (20), characterized in that it comprises a step of applying the adhesive (S) to the connection.

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