KR20170001881U - Large caliber sleeve assembly - Google Patents

Large caliber sleeve assembly Download PDF

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Publication number
KR20170001881U
KR20170001881U KR2020150007566U KR20150007566U KR20170001881U KR 20170001881 U KR20170001881 U KR 20170001881U KR 2020150007566 U KR2020150007566 U KR 2020150007566U KR 20150007566 U KR20150007566 U KR 20150007566U KR 20170001881 U KR20170001881 U KR 20170001881U
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KR
South Korea
Prior art keywords
pipe
main body
wall
length
cover
Prior art date
Application number
KR2020150007566U
Other languages
Korean (ko)
Inventor
김대현
Original Assignee
김대현
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김대현 filed Critical 김대현
Priority to KR2020150007566U priority Critical patent/KR20170001881U/en
Publication of KR20170001881U publication Critical patent/KR20170001881U/en

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G15/00—Forms or shutterings for making openings, cavities, slits, or channels
    • E04G15/06—Forms or shutterings for making openings, cavities, slits, or channels for cavities or channels in walls of floors, e.g. for making chimneys
    • E04G15/061—Non-reusable forms

Abstract

The present invention relates to a pipe protection sleeve installed in a wall structure, comprising a pair of main bodies through which a pipe passes, and a length adjusting pipe provided between the main bodies, and is disposed between the formwork, The pipe is allowed to penetrate the wall while a cover is coupled to the inlet side of the main body so that a space for inserting the waterproof material and a space for inserting the heat insulating material is formed when the cover is removed after the concrete is laid, To a large-diameter sleeve assembly capable of adjusting a length by selecting a length-adjusting pipe according to the length of the sleeve.

Description

Large caliber sleeve assembly < RTI ID = 0.0 >

The present invention relates to a piping protection sleeve installed in a wall structure, and particularly, it can securely and securely hold various piping passing through a building wall, and can be easily installed on the wall of a building Lt; / RTI > sleeve assembly.

In general, the sleeve is formed in a hollow tube-like shape and is used to secure the space of a pipe, a cable or the like in the initial stage of forming a wall, a ceiling or a floor of a concrete structure, In concrete, it is installed in formwork and buried in concrete structure.

Each pipe is supplied through the wall of the building. In the past, it was simply a process of piercing the wall, passing through the pipe, and closing the space between the wall and the pipe with cement. There is a high probability that cracks will occur during the curing process due to the lack of adhesiveness, and leakage may occur due to the cracks. As the temperature and the rise and fall of the walls increase and decrease, Lt; / RTI > In order to solve these problems, a method of manufacturing a concrete according to the present invention has been proposed in which a sleeve penetrating a wall is embedded and fixed, a mold is removed, A technique was developed to connect.

However, the cited design is that the contraction and expansion of the pipe repeatedly occur as the temperature changes as the contents inside the pipe installed through the wall of the building flow. As a result, fatigue accumulates in the piping and cracks are generated, so that leakage of the contents causes leakage of the building walls and corrosion of the piping, thereby shortening the service life of piping and walls.

When the sleeve is removed and the pipe is inserted again, if the size of the hole formed after the removal is different from the size of the pipe, it is necessary to increase the hole or to fill the gap with mortar or cement. There is a problem that the finishing material is not completely adhered to the gap between the sleeve filled with the finishing material and the concrete after the work, or the gap is not filled with the finishing material.

In addition, in order to prevent moisture which may invade from the outside, the periphery of the pipe installed through the wall is blocked with a waterproof liquid or the like. However, since the waterproofing liquid hardens and the cracks and gaps can not be sufficiently blocked, moisture can easily penetrate.

It has been pointed out that the piping can not be fixed at a certain position even when the piping is inserted into the space secured through the sleeve without removing the sleeve,

In addition, since the size of the sleeve and the piping are different, the spacing space between the sleeve and the piping can be filled by filling the filler, but the filler is not completely adhered to the smooth piping, thereby causing moisture to penetrate into the building .

The present invention has been made to solve the above problems, and it is an object of the present invention to solve the above problems, and in particular, it is difficult to properly fix the pipe when the size of the sleeve and the size of the pipe pipe are different from each other, And the problem that the moisture can penetrate into the gap between the sleeve and the wall can be solved and the problem that the wall and the sleeve are cracked due to the contraction and expansion due to the temperature change can be solved, In order to solve the problem that the length of the sleeve must be different according to the length of the sleeve.

According to an aspect of the present invention, there is provided a piping system including a pair of main bodies through which piping passes, and a length adjusting pipe provided between the main bodies, wherein the concrete is installed between the dies, And a cover is coupled to the inlet side of the main body. When the cover is removed after the concrete is laid, a space for filling the waterproofing material is formed. The length control pipe is selected according to the thickness of the wall, And the like.

This design ensures the extension of life and safety of various pipelines by providing the insulation and waterproof function and the rigidity of the sleeve body itself and prevents the phenomenon that the concrete liquid flows into the sleeve and clogs the inside of the sleeve when the concrete is laid, In addition, it is possible to prevent moisture or moisture from entering between the sleeve and the sleeve and the pipe, and furthermore, the length can be adjusted by variously adjusting the thickness of the wall.

1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a sectional view of Fig. 1. Fig.
3 is an exploded perspective view according to an embodiment of the present invention.
FIG. 4 is a cross-sectional view of a state in which a sleeve and a mold are installed before a poured liquid is poured according to an embodiment of the present invention.
FIG. 5 illustrates a state in which a poured liquid is poured in the state of FIG. 4 according to an embodiment of the present invention.
FIG. 6 illustrates a state in which the form is removed in the state of FIG. 5 according to an embodiment of the present invention.
FIG. 7 shows a state in which the cover is removed in the state of FIG. 6 according to the embodiment of the present invention.
FIG. 8 shows a state in which piping, packing, and a compression flange are installed in the state of FIG. 7 according to an embodiment of the present invention.
9 shows a state in which the packing is pressed by the compression flange and the pipe is fixed in the state of FIG. 8 according to the embodiment of the present invention.
FIG. 10 shows a state in which a waterproofing liquid is applied in the state of FIG. 9 according to an embodiment of the present invention.

The present invention relates to a sleeve which can be installed together with a mold 600 before a poured liquid is installed so that a pipe can be efficiently installed on a wall. The length control pipe 200, which is formed to have a length corresponding to the thickness of the wall, And a pair of main bodies 100 are formed on both sides of the length adjusting pipe 200,

The main body 100 is formed to penetrate the pipe so that the pipe can be inserted therein and the hole is connected to the inner space of the length-adjusting pipe 200, and a step is formed in which the inner diameter becomes smaller toward the inside, And is inclined in a direction in which the pipe 200 is formed,

A packing 400 that is inserted into the pipe and can be pushed up to the end of the main body 100 is coupled to the main body 100,

The packing 400 is pressed by the compression flange 300 coupled to the other side of the main body 100 by the bolts 340 and the degree of compression is controlled by tightening the bolts 340, ) Is pushed by the step,

A waterproof groove 140 formed on the other side of the main body 100 is formed and the edge of the cover 500 covers the waterproof groove 140 so that the cover 500 covers the edge of the main body 100 A space protruding toward one side of the main body 100 and capable of applying a waterproof material is formed.

Therefore, it is possible to secure a space for installing the piping through the present invention regardless of the thickness of the wall, and since the piping is separated from the wall and fixed by the present invention, cracks may occur in the wall due to problems occurring in the piping, And the waterproofing material can be thickly applied to the boundary between the wall and the present invention and the boundary between the present invention and the pipe, thereby making it possible to more firmly prevent the penetration of moisture from the outside into the interior. So that the pipe can be held on the wall for a long time.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following detailed description of the operation principle of the preferred embodiment of the present invention, detailed description of known functions or specific descriptions thereof will be omitted when it is determined that the gist of the present invention may unnecessarily obscure the present invention.

Hereinafter, the present invention will be described in detail with reference to FIGS. 1 to 10 attached hereto. The drawings shown in the attached drawings are merely illustrative examples for helping understanding of the present invention. The 'walls' to be described below may be 'floor', 'ceiling', and 'wall' It does not limit the design.

1 and 2 are a perspective view and a cross-sectional view, respectively, of an assembled state according to an embodiment of the present invention. In the present invention, a length-regulating pipe capable of passing through a wall, And a main body 100 formed at both ends of the length adjusting pipe 200 and exposed from the wall.

The length-adjusting pipe 200 may be long enough to correspond to the thickness of the wall, and may be installed before the concrete is poured. That is, when the wall is formed after the concrete is solidified, a space can be formed without the concrete liquid being poured therein so that the pipe can be easily inserted through the wall through the length adjusting pipe 200, do.

The length regulation pipe 200 is formed in a hollow tube shape. In one embodiment, the pipe may be formed using a circular pipe made of PVC. That is, it is preferable to use a material that is easy to cut into a length corresponding to the thickness of the wall and can withstand the pressure according to the weight of the concrete.

The main body 100 is formed at both ends of the length adjusting pipe 200 so that the concrete poured liquid can not enter into the length adjusting pipe 200. The length adjusting pipe 200 may be formed to be inserted into the one side of the main body 100 by a predetermined length and may be installed toward the other side of the main body 100, Can be formed.

In addition, the main body 100 is formed with a hollow inlet which can be connected to the inner space of the length-adjusting pipe 200 so as to be inserted therein.

Accordingly, the length-adjusting pipe 200 is inserted between the pair of main bodies, and the pipe is installed with a pipe having an outer diameter smaller than that of the length-adjusting pipe 200 so that the pipe is not inclined or sagged in the inner space, And may be formed inside the wall so as to be perpendicular to the ground or horizontal.

Also, when the joint of the pipe having a relatively larger diameter than the pipe A is formed in the length-adjusting pipe 200, the pipe may be formed inside the length-adjusting pipe 200.

If the pipe A is changed to a relatively low temperature or high temperature than the temperature of the wall and the expansion and contraction phenomenon occurs differently between the wall and the pipe A, the wall A is not affected, Even if the pipe is ruptured, the leakage phenomenon does not occur in the wall.

In addition, the length adjusting pipe 200 is formed to have an inner diameter larger than that of the pipe, so that the outer pipe of the pipe A can be separated from the outer pipe of the pipe A, 800 may be provided.

That is, it is necessary to keep the hot water in the pipe (A) from escaping out of the pipe (A) and to maintain the hot water continuously, or to prevent the heat exchange between the inside and the outside Since the heat insulating material 800 can be provided inside the length adjusting pipe 200 to cover the pipe, durability can be improved and heat exchange can be prevented, so that the thermal efficiency can be increased and the freezing can be prevented .

FIG. 3 is an exploded perspective view according to an embodiment of the present invention. The main body 100 has an inner diameter larger than the outer diameter of a pipe embedded in the wall. In other words, it is possible to install pipes having various sizes of diameters.

The inner diameter is formed so as to be inclined toward the length adjusting pipe 200 so that the diameter of the inner diameter decreases toward one side of the main body 100, do.

The packing 400 is formed with a central portion through which the piping can be inserted, and the edge is formed with an inclined surface corresponding to the inclined step of the main body 100.

Accordingly, the packing 400 can be directed to the center of the pipe along the inclined surface, so that the packing 400 can be further pressed so that the pipe A and the main body 100 are not mangled, It is possible to firmly seal the inner space of the housing.

In addition, when the weight or diameter of the gas pipe is relatively lighter or smaller than that of other types of pipes, or when minute vibrations may occur depending on the flow rate inside the pipe A, thereby continuously impacting the wall, Vibration can be alleviated by the packing 400 and the pipe A can be fixed to the inside of the wall by a slope which is intended to be horizontal or vertical without a separate fixing device.

In addition, the packing 400 may be formed of an elastic material such as rubber having a low thermal conductivity. Therefore, even if the piping A is vibrated by the flow velocity or shrinks or expands due to temperature, the influence of the piping A on the main body 100 fixed to the wall can be reduced, so that the wall and the main body 100 are not damaged It is possible to extend the service life.

In addition, the packing 400 can be inserted and withdrawn on the opposite side of the length adjusting pipe 200 coupled with the main body 100 so that the packing 400 can be exchanged with the main body 100.

In the main body 100, a crimping flange 300 may be coupled to an opposite side of the main body 100 to which the length adjusting pipe 200 is coupled. The crimping flange 300 is coupled by screwing of the main body 100. That is, the main body 100 is formed with a bolt insertion space 160 at a position corresponding to a hole formed to be engageable with the bolt 340 of the crimping flange 300 so as to be screwable, A nut may be coupled to the space 160 or an inner thread of the nut may be formed on the inner wall of the bolt insertion space 160 so as to correspond to a male thread of the bolt 340.

The pressing flange 300 may be formed with a pressing protrusion 320 in the direction of the main body 100. The pressing protrusion 320 is equal to the width of the packing 400 coupled to the inside of the main body 100 so that the pressing force can be uniformly transmitted to the packing 400. That is, the compression flange 300 is coupled with the main body 100 by the bolts 340 so that the compression protrusions 320 of the compression flange 300 are pressed against the packing 400 is pushed to the step of the main body 100, the packing 400 is pressed against the step.

As described above, the packing 400 is formed on the inner side of the main body 100 so as to be inclined, so that the compression protrusion 320 presses the packing 400, The packing 400 is moved obliquely downward along the inclined surface of the step.

Therefore, the packing 400, which is pressed downward, can be more firmly fixed without forming a gap between the pipe A and the packing 400 by further pressing and fixing the inserted pipe, A and the main body 100, and it is possible to completely seal the periphery of the pipe, so that moisture and moisture can flow from the outside of the main body 100 to the inside of the main body 100 It is possible to prevent penetration.

As described above, the pressing flange 100 may be formed to protrude so as to press the packing 400 by forming a pressing protrusion 320 toward the one side. The compression protrusion 320 is formed to be hollow so that the heat insulating material 800 can be provided in the empty space.

8 to 10, the pipe A may be inserted into the body 100 and the compression flange 100 to form a pipe A which is exposed to the outside. Here, the heat insulating material 800 is formed so as to surround the outer surface of the pipe A, and the end portion of the heat insulating material 800 can be positioned deeper toward the inside than the boundary of the surface of the wall body.

Accordingly, since the end of the heat insulating material 800 surrounding the pipe A is aged and widened or loosened with time, it is possible to prevent the pipe A from being exposed, And the pipe (A) can be covered more firmly, thereby preventing the heat from being transferred.

In addition, when the concrete is poured, the cover 500 is pushed in the state where the cover 500 is coupled to the main body 100, so that the poured liquid does not leak into the main body 100. After the poured liquid is hardened, So that a space is formed by the position where the cover 500 is formed, and the main body 100 is exposed.

Further, the cover 500 is formed to be larger than the outer diameter of the main body 100 and protrude toward the one side so as to cover the edge of the main body 100.

That is, the cover 500 is formed to be larger than the diameter of the main body 100, and a protrusion 520 is formed to surround the edge of the main body 100 and to be inclined downward from the outer side of the wall, .

Accordingly, the cover 500 can be easily detached from the wall by minimizing the adhesive force between the wall after the concrete is hardened and the cover 500, and the cover 500 can be easily removed from the wall by the cover 500, 100 are formed in such a manner that the edge of the main body 100 protrudes from the wall and is exposed to the outside without being filled with the poured liquid by the degree of protrusion of the cover 500. The gap between the sleeve and the wall By applying a waterproofing material to the surface of the wall to prevent this, the waterproofing material is applied more deeply along the gap between the walls, thereby increasing the effectiveness of the waterproofing.

In addition, the main body 100 may have a waterproof groove 140 formed along the edge thereof on the other side opposite to the side where the length adjusting pipe 200 is coupled.

The waterproof grooves 140 are formed so as to be inward of the edges of the main body 100 so that when the concrete is poured, the poured liquid is not filled and becomes empty after pouring. That is, when the waterproofing material 700 is applied including the waterproofing groove 140, the thickness of the waterproofing material 700 becomes thicker, and the waterproofing material applied to the inside of the body 100 is deeply coated. 700 are integrally formed and then fixed to the waterproof groove 140 so that moisture can be blocked while the waterproofing material is held for a long time more firmly.

The surface of the main body 100 is bent by the waterproofing groove 140 even when the waterproofing material 700 is difficult to adhere to the surface of the main body 100 such as a wall or the surface of the main body 100 is smoothly formed, So that it can be adhered without being easily flowed out.

In addition, a cover 500 formed at a finishing step of forming a waterproof groove 140 in the main body 100 to form a wall by pouring a putted liquid or applying a waterproofing material to block moisture from the outside, The gap between the boundary of the body 100 and the boundary between the waterproofing material 700 or the wall and the main body 100 is bent so as to effectively prevent penetration of the poured liquid or external moisture into the main body 100 .

The main body 100 is formed with a waterproof vane 120 so that the main body 100 can not be easily separated from the wall after the poured liquid is solidified. That is, the waterproof vane 120 may be formed to protrude along the outer surface of the main body 100, or may have a separate structure.

Therefore, when water or moisture penetrates into the space between the wall and the main body 100, the waterproof vane 120 can no longer penetrate into the inside of the building or the inside of the wall, such as when installed on the outer wall of the building .

Further, after the wall is completed, it is exposed from the surface of the wall so that the entire surface of the wall is opened. However, even if the waterproof vane 120 And the main body 100 is not easily detached by being fixed by the concrete in the inside of the wall.

Hereinafter, as described above, the present invention will be described with reference to the drawings and a state of the installation process.

4 is a perspective view illustrating a state in which a cover 500 is coupled to a pair of main bodies 100 coupled to both sides of the length adjusting pipe 200 according to an embodiment of the present invention, The mold 600 is installed.

That is, it is possible to secure a space at a position where the sleeve is installed and penetrates the pipe before the concrete pouring solution before the wall is formed.

In addition, as described with reference to FIG. 3, a heat insulating material 800 may be provided inside the length adjusting pipe 200.

A heat insulating material 800 provided inside the length adjusting pipe 200 is integrally formed with the inner wall of the length adjusting pipe 200 and is provided between the pair of the main bodies 100 And may be separately formed from the length adjusting pipe 200 and inserted into the length adjusting pipe 200 through the inlet of the main body 100 after the concrete is poured.

When the pipe A is inserted through the pressure flange 300 and the main body 100 while being coupled to the outer pipe of the pipe A, the length control pipe 200, together with the pipe A, As shown in Fig.

Therefore, the heat insulating material 800 is not limited to be provided in a specific step, and may be provided in various stages, so that the heat insulating material 800 can be conveniently installed according to the use and size of the pipe A have.

5 shows a state in which a concrete pouring solution is installed in a state where the formwork 600 is installed, in addition to those described above.

That is, a space in which the liquid is not poured by the sleeve is formed, and the poured liquid does not permeate into the body 100 by the cover 500.

6 shows a state in which the concrete pouring solution is hardened and the mold 600 is removed, in addition to the above-described ones.

That is, after the cover 500 and the mold 600 are in contact with each other and the poured liquid is hardened to form the wall, the mold 600 is removed, so that a single layer is formed at the boundary between the surface of the cover 500 and the surface of the wall And is formed flat without being formed.

7 shows a state in which the cover 500, which is formed flat with the surface of the wall, is removed from the main body 100, in addition to those described above.

That is, the poured liquid is not poured by the space in which the cover 500 is formed but is empty, so that the other side of the main body 100 is exposed.

8 shows a state in which a pipe and a packing are inserted into the exposed main body 100 and the crimping flange 300 is not tightened by the bolts 340, in addition to the above-described one.

That is, the piping A may be coupled to the main body 100 in a state of being inserted into the packing 400, or the packing 400 may be inserted in a state where a pipe is inserted into the main body 100. Here, the packing 400 is inserted into the pipe A and inserted into a place where the step of the main body 100 is formed, so that the pipe 400 can be installed at a predetermined position such that the pipe is located at a central portion of the main body 100.

Also, the packing can be directed in one direction without being detached from the main body 100 by the crimping flange 300.

9 shows a state in which the packing 400 is tightened by screwing the compression flange 300 in a state where the packing 400 is fixed by the compression flange 300, And the piping is fixed by the packing 400 by being pushed in the direction in which the length-adjusting pipe 200 is formed.

That is, due to the inclined step of the main body 100, the packing 400 is pushed by the compression protrusion 320 of the crimping flange 300 and is directed toward the center of the pipe at an angle. Accordingly, the gap between the packing (400) and the pipe (A) is tightened, so that the pipe is firmly fixed.

10 shows a state in which the waterproofing material is applied to the surface of the wall body and the surface of the main body 100 in a state where the piping is firmly fixed, in addition to the above-described one.

That is, the waterproofing material is applied to the place where the cover 500 is removed, and is applied to the inside of the wall along the edge of the main body 100 and deeply applied to the waterproof groove 140 of the main body 100, The waterproofing material can be formed more firmly on the surface of the main body 100 and can be held.

The waterproof material is deeply applied to the clearance between the boundary between the main body 100 and the wall and the clearance between the boundary between the main pipe 100 and the pipe A, It is possible to more firmly prevent penetration into the inside.

100: main body 120: waterproof blade
140: Waterproof groove 160: Bolt insertion space
200: length-regulating pipe 300: crimping flange
320: compression protrusion 340: bolt
400: Packing 500: Cover
520: protrusion 600: die
700: Waterproofing material 800: Insulation material
A: Piping

Claims (5)

A pair of main bodies 100 through which the pipe A passes and a length adjusting pipe 200 provided between the main body 100 and disposed between the dies 600 so as to be embedded in the wall, The pipe A can penetrate through the wall,
A cover 500 is coupled to the inlet side of the main body 100. When the cover 500 is removed after the concrete is laid, a space for filling the waterproof material 700 is formed,
Wherein the length adjustment pipe (200) is selected according to the thickness of the wall to adjust the length thereof. The method according to claim 1,
A packing (400) is installed between the main body (100) and the pipe (A) to seal the pipe (A)
The main body 100 has an inclined surface formed inwardly from one point on the inner circumferential surface,
Wherein the packing is pushed by the pressing flange (300) provided to push the packing (400) at the entrance side of the main body (100) and pressed along the slanted surface. The method according to claim 1,
The length adjusting pipe 200 is formed to have a larger inner diameter than the pipe so that the length of the length adjusting pipe 200 can be spaced apart from the outer surface of the pipe A and the heat insulating material 800 In addition,
(EN) A large - diameter sleeve assembly capable of increasing the durability of the pipe (A) and reducing the degree of heat transfer. The method according to claim 1,
Wherein the body (100) has a watertight groove (140) formed along an edge thereof at an inlet thereof. The method according to claim 1,
The cover 500 is formed to be larger than the diameter of the main body 100 and is formed with a protrusion 520 which is formed to have a smaller diameter by being inclined downward from the outside of the wall to surround the edge of the main body 100,
Wherein the cover (500) can be easily separated to apply the waterproof material (700) thickly.
KR2020150007566U 2015-11-20 2015-11-20 Large caliber sleeve assembly KR20170001881U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2020150007566U KR20170001881U (en) 2015-11-20 2015-11-20 Large caliber sleeve assembly

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Application Number Priority Date Filing Date Title
KR2020150007566U KR20170001881U (en) 2015-11-20 2015-11-20 Large caliber sleeve assembly

Publications (1)

Publication Number Publication Date
KR20170001881U true KR20170001881U (en) 2017-05-30

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KR2020150007566U KR20170001881U (en) 2015-11-20 2015-11-20 Large caliber sleeve assembly

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101989076B1 (en) * 2018-09-05 2019-06-13 변민혁 Waterproof piping structure for water dabbling facility and water landscaping facility
KR102009872B1 (en) * 2018-11-27 2019-10-21 한국건설기술연구원 the wall opening form and wall opening frame manufactured using the 3D printer
KR102132819B1 (en) * 2019-06-04 2020-07-21 재우이엔지(주) Exhausting duct

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101989076B1 (en) * 2018-09-05 2019-06-13 변민혁 Waterproof piping structure for water dabbling facility and water landscaping facility
KR102009872B1 (en) * 2018-11-27 2019-10-21 한국건설기술연구원 the wall opening form and wall opening frame manufactured using the 3D printer
KR102132819B1 (en) * 2019-06-04 2020-07-21 재우이엔지(주) Exhausting duct

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