KR20110114991A - Molding apparatus manhole branch pipe connet hole - Google Patents

Molding apparatus manhole branch pipe connet hole Download PDF

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Publication number
KR20110114991A
KR20110114991A KR1020100034416A KR20100034416A KR20110114991A KR 20110114991 A KR20110114991 A KR 20110114991A KR 1020100034416 A KR1020100034416 A KR 1020100034416A KR 20100034416 A KR20100034416 A KR 20100034416A KR 20110114991 A KR20110114991 A KR 20110114991A
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KR
South Korea
Prior art keywords
manhole
band
watertight
circumferential surface
connecting hole
Prior art date
Application number
KR1020100034416A
Other languages
Korean (ko)
Inventor
김병호
Original Assignee
김병호
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 김병호 filed Critical 김병호
Priority to KR1020100034416A priority Critical patent/KR20110114991A/en
Publication of KR20110114991A publication Critical patent/KR20110114991A/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D29/00—Independent underground or underwater structures; Retaining walls
    • E02D29/12—Manhole shafts; Other inspection or access chambers; Accessories therefor
    • E02D29/121—Manhole shafts; Other inspection or access chambers; Accessories therefor characterised by the connection between shaft elements, e.g. of rings forming said shaft
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F5/00—Sewerage structures
    • E03F5/02—Manhole shafts or other inspection chambers; Snow-filling openings; accessories
    • E03F5/021—Connection of sewer pipes to manhole shaft
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/10—Adhesive or cemented joints
    • F16L13/11—Adhesive or cemented joints using materials which fill the space between parts of a joint before hardening
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03F—SEWERS; CESSPOOLS
    • E03F3/00—Sewer pipe-line systems
    • E03F3/04—Pipes or fittings specially adapted to sewers

Abstract

The present invention relates to an apparatus for forming a manhole tube connecting hole, which is integrally formed by inserting a watertight band capable of combining a manhole tube connecting hole for coupling and fixing a manhole tube during molding of a manhole, and a band for connecting a manhole tube connecting band when forming a manhole. The purpose of the present invention is to make it easier to mold the manhole tube connecting hole in which the watertight band is integrally molded by molding the manhole. The present invention configured for this purpose is formed in the form of a ring of a predetermined thickness detachably coupled on the outer circumferential surface of the cylindrical connection hole forming tool, the connection hole forming tool is installed between the outer mold and the resistant mold forming a branch connection hole On the outer circumferential surface, a plurality of watertight grooves are formed on the inner circumferential surface in response to the mounting band of the flexible synthetic resin material and a watertight protrusion formed on the outer circumferential surface of the mounting band, in which a plurality of watertight protrusions in the form of bands are formed at predetermined intervals. It is detachably coupled but consists of a watertight band of soft synthetic resin material formed with a plurality of molding protrusions which are molded at the time of curing of concrete mortar on the outer peripheral surface.

Description

Molding apparatus manhole branch pipe connet hole}

The present invention relates to a connecting hole forming apparatus for a manhole tube, and more particularly, a watertight band capable of combining a manhole tube connecting hole for coupling and fixing a manhole tube when forming a manhole, and a band for connecting a manhole tube connecting manhole when forming a manhole. The present invention relates to a manhole tube connecting hole forming apparatus which can be molded by insert molding into a single unit so as to facilitate connection of the manhole tube.

In general, the construction of manholes consists of manholes installed in the pit with a certain depth in the ground, such as the starting point or intersection of the manhole branch, the point where the thickness or direction of the manhole branch changes, and the middle point of the long manhole branch. Next, the manhole is connected to one side of the manhole by embedding the manhole through the cover. At this time, the manhole branch pipe is inserted and connected through a branch pipe connection hole perforated in the manhole or connected through a branch pipe connecting socket to a branch pipe connector that is integrally insert-molded in the manhole.

Among the connection methods of the manhole branch pipes as described above, the manhole branch pipe is connected to the manhole branch through a branch hole drilled in the manhole. It is a way to insert and connect. At this time, the manhole tube is made of a structure to prevent the leakage of the gap between the branch pipe connecting hole and the manhole tube by adhering the circumference of the branch connecting hole through the adhesive mortar.

However, in the above connection method, if the manhole sinks or changes its position due to other reasons such as subsidence of the ground where the manhole is installed, the manhole branch pipe is separated from the branch hole of the manhole, or a gap is formed between the branch hole and the manhole branch pipe. This occurred and there was a problem that leaks of sewage and waste water. In order to improve the problems of the connection method, a method of connecting a manhole branch pipe through a branch connection socket to a branch connector integrated into the manhole has been utilized.

On the other hand, the manhole is molded through a curing process for a certain time after the cement concrete is poured into the molding die. At this time, the manhole is formed with at least one branch pipe connection hole for connecting the manhole branch pipe. As described above, the branch connection hole is formed through a hole in one side of the manhole, or is connected to the branch pipe connector which is integrally insert-molded at the time of molding the manhole through the branch connection socket.

Looking at the above-described configuration in detail, the cement mold is filled in the mold in the state provided with a mold for forming a manhole or branch pipe connection hole, and then the cement mold filled with the cement concrete is moved to a curing room for a certain time. Curing takes place under temperature. Subsequently, after a certain period of time, the mold is removed from the curing chamber to separate the mold and the manhole, and the manhole is dried and cured at room temperature.

However, as described above, when the branch connection hole is drilled in the manhole formed through the manhole forming apparatus according to the prior art, the branch connection hole must be drilled through post-working, resulting in a decrease in productivity and a decrease in work efficiency. .

In addition, when the manhole is formed by integrally inserting the branch connector in order to form the branch connection hole in the manhole forming method according to the prior art as described above, since the size of the inserted branch pipe connector is determined, the manhole is a manhole. There is a problem that can not flexibly cope with the situation during construction.

The present invention has been made to solve all the problems of the prior art, the manhole tube connecting hole for coupling and fixing the manhole tube when forming the manhole integrally watertight band that can combine the band for connecting the manhole tube when forming the manhole It is an object of the present invention to provide a manhole tube connecting hole forming apparatus which makes it easier to form a manhole tube connecting hole in which a watertight band is integrally molded by molding a manhole by a method of insert molding a furnace.

In addition, the technique according to the present invention by forming a manhole tube connecting hole for coupling and fixing the manhole tube during the molding of the manhole by molding the watertight band that can combine the band for connecting the manhole tube when forming the manhole integrally insert molding The purpose is to facilitate the connection of the manhole tube.

The present invention configured to achieve the above object is as follows. That is, the manhole tube connecting hole forming apparatus according to the present invention is a manhole tube connecting hole forming apparatus for connecting the manhole tube in which the inflow and discharge of sewage and wastewater is made to the manhole, the outer mold forming the outer diameter of the manhole Cylindrical connection hole is installed in the inner center of the outer mold and formed on the through hole formed through the same center line of the circumferential surface of the resistant mold forming the inner diameter of the manhole. Molding sphere; A band for attaching a flexible synthetic resin material formed in a ring shape having a predetermined thickness that is detachably coupled to the outer circumferential surface of the connection hole forming tool, and a plurality of strip-shaped watertight protrusions are formed at a predetermined interval; And a plurality of watertight grooves are formed on the inner circumferential surface in correspondence to the watertight protrusions formed on the outer circumferential surface of the mounting band, and are detachably coupled to the outer circumferential surface of the mounting band, but on the outer circumferential surface, a plurality of molding protrusions are molded when the concrete mortar is cured. It consists of a configuration including a watertight band of the formed soft synthetic resin material.

In the configuration of the present invention as described above, the mounting band may be configured to be coupled to the outer circumferential surface of the connecting hole molding sphere in a state coupled to the inner circumferential surface of the watertight band. On the other hand, after the molding of the manhole, the connection hole forming tool and the mounting band are removed from the molded manhole, and only the watertight band is inserted and fixed on the manhole tube connecting hole of the manhole.

In addition, the constitution according to the present invention is coupled to the inner diameter of the watertight band in the state in which the connecting hole forming tool and the mounting band is removed after the formation of the manhole, but the inner joint corresponding to the inner diameter corresponding to the outer diameter of the manhole tube through the center pipe joint hole and the outer peripheral surface Formed watertight protrusions are formed on the inner circumferential surface of the plurality of watertight protrusions and branch pipe coupling hole formed to be watertight through close coupling with the watertight grooves of the watertight bands to form watertightness between the outer peripheral surface of the manhole tube pipe Manhole tube connection band made of may be further configured.

In addition, the inner end and the outer end of the connector forming tool in the configuration of the present invention is made of a curvature corresponding to the curvature of the outer mold and the resistant mold when forming a circular manhole, and when forming a rectangular manhole and the inner end of the connector molding tool The outer end is more preferably formed in a plane corresponding to the plane of the outer mold and the resistant mold.

According to the technique of the present invention by forming a manhole by molding a manhole tube connecting hole for coupling and fixing the manhole tube during the molding of the manhole integrally insert molding a watertight band that can combine the band for connecting the manhole tube when forming the manhole It is possible to more easily form the manhole tube connecting hole molded integrally with the watertight band.

In addition, the technique according to the present invention by forming a manhole tube connecting hole for coupling and fixing the manhole tube during the molding of the manhole by molding the watertight band that can combine the band for connecting the manhole tube when forming the manhole integrally insert molding The manhole tube can be connected more easily.

1 is a perspective view showing the separation of the manhole tube connecting hole forming apparatus according to the present invention.
Figure 2 is a perspective view showing a combined manhole tube connecting hole forming apparatus according to the present invention.
Figure 3 is a cross-sectional view showing a combined state of the manhole tube connecting hole forming apparatus according to the present invention.
Figure 4a is a perspective view showing a band for connecting the manhole tube according to the present invention.
Figure 4b is a cross-sectional view showing a band for connecting the manhole tube according to the present invention.
Figure 5a is a cross-sectional view showing a circular manhole forming apparatus to which the manhole tube connecting hole forming apparatus according to the present invention is applied.
Figure 5b is a cross-sectional view showing the removal of the connecting hole forming tool and the mounting band constituting the manhole tube connecting hole forming apparatus according to the present invention.
Figure 6 is a cross-sectional view showing the connection of the manhole tube through the band for connecting the manhole tube to the manhole formed in accordance with the present invention.

Hereinafter, a manhole tube connecting hole forming apparatus according to a preferred embodiment of the present invention will be described in detail.

1 is a perspective view showing a separate manhole tube connecting hole forming apparatus according to the present invention, Figure 2 is a perspective view showing a combined manhole tube connecting hole forming apparatus according to the present invention, Figure 3 is a manhole according to the present invention 4A is a cross-sectional configuration view showing a manhole pipe connection band according to the present invention, and FIG. 4B is a cross-sectional configuration view showing a manhole pipe connection band according to the present invention. Figure 5a is a planar cross-sectional view showing a circular manhole forming apparatus applied to the manhole tube connecting hole forming apparatus according to the present invention, Figure 5b is a connecting hole forming tool and mounting band constituting the manhole tube connecting hole forming apparatus according to the present invention Figure 6 is a cross-sectional configuration showing the removal of, Figure 6 is a cross-sectional configuration showing the connection of the manhole tube through the band for connecting the manhole tube to the manhole formed in accordance with the present invention.

Manhole pipe connector forming apparatus according to the present invention refers to a device for forming the branch pipe connection hole 20 for connecting the manhole pipe 30 to the manhole 10, the manhole pipe connector forming apparatus according to the present invention 1 to 6 is formed between the outer mold 110 and the resistant mold 120 constituting the manhole forming apparatus 100 as shown in Figure 6 to form a cylindrical connection hole forming a branch connection hole 20 Sphere 130, is formed in a ring shape of a predetermined thickness that is detachably coupled on the outer peripheral surface of the connecting hole molding sphere 130, the outer peripheral surface of the mounting of the flexible synthetic resin material formed a plurality of water-tight projections 142 of a predetermined interval Corresponding to the watertight protrusion 142 formed on the outer circumferential surface of the band 140 and the mounting band 140, a plurality of watertight grooves 152 are formed on the inner circumferential surface so as to be detachable on the outer circumferential surface of the mounting band 140. But on the outer circumference Curing agent when the molding projection 154, which is insert-molding of the mortar is made of the configuration of a number of soft synthetic resin material formed water-tight band (150).

In the case of forming the manhole 10 by installing the manhole tube connecting hole forming apparatus configured as described above in the manhole forming apparatus 100, the mounting band 140 is connected to the inner diameter of the watertight band 150. It is coupled to the outer circumferential surface of the molding sphere 130 is fixed on the through-holes 112 and 122 of the outer mold 110 and the resistant mold 120. In this state, when the concrete mortar is filled and cured in the space between the outer mold 110 and the resistant mold 120, the molding protrusion 154 on the outer circumferential surface of the watertight band 150 at the outermost part is molded on the cured concrete. It is done.

On the other hand, after filling and curing the concrete mortar in the space between the outer mold 110 and the resistant mold 120 as described above, after demoulding the outer mold 110 and the resistant mold 120, according to the present invention The connecting hole forming tool 130 and the mounting band 140 of the manhole pipe connecting hole forming apparatus are demolded from the molded manhole 10.

In other words, in the process of demolding the manhole tube connecting hole forming apparatus according to the present invention, the demolding order is performed in the state in which the coupling hole forming tool 130 is fixedly released from the outer mold 110 and the resistant mold 120. After demolding the mold 110 and the resistant mold 120, the mounting band 140 is mounted from the inner diameter of the watertight band 150 in a state in which the connecting hole forming tool 130 is first demolded from the inner diameter of the mounting band 140. Demold. Therefore, only the insert-molded watertight band 150 is fixedly positioned in the manhole tube connecting hole 20 of the molded manhole 10 through the molding protrusion 152 on the outer circumferential surface thereof.

Referring to each component constituting the connecting hole forming apparatus for manhole tube according to the present invention in detail as follows. First, the connection hole forming tool 130 is for molding the branch pipe connection hole 20 in the manhole 10, this connection hole forming tool 130 is shown in Figures 1 to 3 of the manhole 10 Through-holes 112, which are formed at the inner center of the outer mold 110 and outer mold 110 to form the outer diameter is formed through the same center line of the circumferential surface of the resistant mold 120 to form the inner diameter of the manhole 10, 122 is fixed to the installation but is made of a cylindrical shape forming a manhole tube connecting hole 20 of the manhole 10 to be molded.

The inner end and the outer end of the connection hole forming tool 130 is configured as described above is made of the same curvature corresponding to the curvature of the outer mold 110 and the resistant mold 120 when forming the circular manhole (10). As such, the inner end and the outer end of the connection hole forming tool 130 having the same curvature corresponding to the curvature of the outer mold 110 and the resistant mold 120 for forming the circular manhole 10 may be formed of the manhole 10. When forming the inner end and the outer end of the connection hole forming tool 130 to match the through-shaped groove 110 and the through-holes 112 and 122 of the resistant mold 120 between the outer mold 110 and the resistant mold 120 This is to prevent leakage of concrete mortar which is filled into the space.

In the case of forming a rectangular manhole (not shown), the inner end and the outer end of the connection hole forming tool are formed on a plane corresponding to the plane of the outer mold and the resistant mold. In order to prevent the filled concrete mortar from leaking between the external mold and the connector molding tool that is connected to the through-hole of the resistant mold, the inner and outer ends of the molding tool hole correspond to the plane of the external mold and the resistant mold. It is formed into a phase.

Next, the mounting band 140 constituting the present invention is to be mounted on the connecting hole molding sphere 130 by combining the water-tight band 150 to be described later to the outer periphery, such a mounting band 140 1 to 3 and, as shown in Figures 5a and 5b is formed in a ring shape of a predetermined thickness that is detachably coupled on the outer peripheral surface of the connection hole forming tool 130, but the outer peripheral surface of the water-tight protrusion (in the form of a band) 142 is made of a soft synthetic resin material formed a plurality at regular intervals.

The mounting band 140 configured as described above may be configured to be coupled on the outer circumferential surface of the connection hole forming tool 130 in a state coupled to the inner circumferential surface of the watertight band 150. On the other hand, after the molding of the manhole 10, the connection hole forming tool 130 and the mounting band 140 from the formed manhole 10 is removed and the watertight to be described later on the manhole tube connecting hole 20 of the manhole 10 Only the band 150 is fixed in the insert molded state.

Watertight band 150 constituting the present invention is to ensure that the watertight is made between the manhole tube 30 through a combination with the manhole tube connection band 160 to be described later, such a watertight band 150 is 1 to 3, and as shown in FIGS. 5 and 6, a plurality of watertight grooves 152 are formed on the inner circumferential surface corresponding to the watertight protrusion 142 formed on the outer circumferential surface of the mounting band 140. It is detachably coupled on the outer circumferential surface of the band 140, but on the outer circumferential surface is formed of a soft synthetic resin material formed with a plurality of molding protrusions (154) molded in the molding of the concrete mortar.

The watertight band 150 configured as described above is coupled to the outer circumferential surface of the connection hole forming tool 130 in a state coupled to the mounting band 140 outer circumferential surface on the outer circumferential surface during the molding of the manhole 10 by concrete pouring. The formed molding protrusion 154 is integrated with the manhole tube connecting hole 20 of the manhole 10 by insert molding the cured concrete. In this case, the molding protrusion 154 is watertight between the outer circumferential surface of the watertight band 150 and the manhole tube connecting hole 20 by insert molding the concrete.

Meanwhile, as described above, after the manhole 10 is formed through the manhole tube connecting hole forming apparatus including the connection hole forming tool 130, the mounting band 140, and the watertight band 150, As described above, only the watertight band 150 which is insert-molded through the molding protrusion 154 on the manhole tube connection hole 20 of the manhole 10 is fixedly positioned, and the connection hole molding tool 130 and the mounting band 140 are Removed.

Next, the manhole tube connection band 160 constituting the present invention is to connect the manhole tube 30 to the manhole tube connection hole 20 during the construction of the manhole 10, such a manhole tube connection band As shown in FIGS. 4A, 4B, and 6, the inner diameter of the watertight band 150 in which the connector hole 130 and the mounting band 140 are removed after molding the manhole 10 is shown. Being coupled to the inner pipe corresponding to the inner diameter corresponding to the outer diameter of the manhole tube 30 is formed through the branch pipe coupling hole 162 and the outer circumferential surface watertight through the close coupling with the watertight groove 152 of the water-tight band 150 It is formed on the inner circumferential surface of the plurality of watertight protrusions 164 and the branch pipe coupling hole 162 to be made of a branch pipe watertight protrusion 166 to be watertight between the outer circumferential surface of the manhole tube 30.

Manhole tube connection band 160 configured as described above of the watertight band 150 through a watertight protrusion 164 formed on the outer circumferential surface corresponding to the watertight groove 152 formed on the inner circumferential surface of the watertight band 150 The watertight coupling between the watertight band 150 and the manhole tube connection band 160 is achieved by being closely coupled to the watertight groove 152, while a plurality of branch watertight seals are formed on the inner circumferential surface of the manhole tube connection band 160. The protrusion 166 is configured to be watertight between the manhole tube connection band 160 and the manhole tube 30.

On the other hand, the manhole pipe connection band 160 is configured as described above is a manhole (mounted in the state of being mounted on the inner diameter of the water-tight band 150 in a state in which the connection hole molding tool 130 and the mounting band 140 is removed. 10) may be delivered, or may be delivered separately from the manhole (10), it may be said that the delivery to the opponent mounted on the manhole (10) in the manufacturing plant is better logistics.

As described above, the manhole tube connecting hole forming apparatus according to the present invention is watertight through the configuration of the connecting hole forming tool 130, the mounting band 140, the watertight band 150 and the manhole tube connection band 160 Good manhole 10 can be provided.

The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

10. Manhole 20. Manhole Branch Connector
30. Manhole Tube 100. Manhole Forming Equipment
110. Outer mold 120. Inner mold
130. Fitting hole 140. Mounting band
142. Watertight protrusions 150. Watertight bands
152. Watertight groove 154. Molding protrusion
160. Manhole branch connection band 162. Branch joint hole
164. Watertight projections 166. Branch watertight projections

Claims (5)

In the manhole pipe connecting device for connecting the manhole pipe in which the inflow and discharge of sewage and waste water is discharged to the manhole,
Branch of the manhole formed and fixed on the through-hole formed through the same center line of the outer mold of the outer mold forming the outer diameter of the manhole and the inner mold of the outer mold to form the inner diameter of the manhole A connecting hole molding tool having a cylindrical shape to form a connecting hole;
A band for attaching a flexible synthetic resin material formed in a ring shape having a predetermined thickness that is detachably coupled to the outer circumferential surface of the connection hole forming tool, and a plurality of strip-shaped watertight protrusions are formed at a predetermined interval; And
A plurality of watertight grooves are formed on the inner circumferential surface corresponding to the watertight protrusions formed on the outer circumferential surface of the mounting band to be detachably coupled to the outer circumferential surface of the mounting band, but molding moldings are molded on the outer circumferential surface during curing of the concrete mortar. Manhole pipe connecting hole forming apparatus, characterized in that consisting of a configuration including a water-tight band of a plurality of formed soft synthetic resin material. The manhole tube connecting hole forming apparatus according to claim 1, wherein the mounting band is coupled to an outer circumferential surface of the connecting hole forming tool in a state of being coupled on the inner circumferential surface of the watertight band. 3. The method of claim 2, wherein after forming the manhole, the connector hole and the mounting band are removed from the formed manhole, and only the watertight band is fixed to the insert molding state on the manhole tube connecting hole of the manhole. Manhole pipe connector forming equipment. According to claim 3, After the forming of the manhole and the connecting hole forming tool and the mounting band is coupled to the watertight band inner diameter of the state is removed and the branch pipe coupling hole is formed through the center with an inner diameter corresponding to the outer diameter of the manhole tube; Rings formed on the outer circumferential surface and formed on the inner circumferential surface of the branch pipe coupling hole and a plurality of watertight protrusions to achieve watertightness through tight coupling with the watertight grooves of the watertight band. Manhole pipe connector forming device, characterized in that the band further comprises a manhole pipe connection band consisting of a paper tube watertight projection. According to any one of claims 1 to 4, wherein the inner end and the outer end of the connecting hole forming tool is made of a curvature corresponding to the curvature of the outer mold and the resistant mold when forming a circular manhole, the rectangular manhole When forming the inner end and the outer end of the connection hole forming tool is a manhole tube connecting hole forming apparatus, characterized in that the planar shape corresponding to the plane of the outer mold and the resistant mold.
KR1020100034416A 2010-04-14 2010-04-14 Molding apparatus manhole branch pipe connet hole KR20110114991A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020100034416A KR20110114991A (en) 2010-04-14 2010-04-14 Molding apparatus manhole branch pipe connet hole

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Application Number Priority Date Filing Date Title
KR1020100034416A KR20110114991A (en) 2010-04-14 2010-04-14 Molding apparatus manhole branch pipe connet hole

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KR20110114991A true KR20110114991A (en) 2011-10-20

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103921403A (en) * 2014-04-24 2014-07-16 黄希顺 Integrally reinforced inspection well mold
KR20160116873A (en) * 2015-03-31 2016-10-10 오강원 Drain coupling mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103921403A (en) * 2014-04-24 2014-07-16 黄希顺 Integrally reinforced inspection well mold
KR20160116873A (en) * 2015-03-31 2016-10-10 오강원 Drain coupling mechanism

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