WO2011078604A2 - 무동력 역류 방지장치 - Google Patents
무동력 역류 방지장치 Download PDFInfo
- Publication number
- WO2011078604A2 WO2011078604A2 PCT/KR2010/009283 KR2010009283W WO2011078604A2 WO 2011078604 A2 WO2011078604 A2 WO 2011078604A2 KR 2010009283 W KR2010009283 W KR 2010009283W WO 2011078604 A2 WO2011078604 A2 WO 2011078604A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sewage
- opening
- door
- closing door
- communication port
- Prior art date
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Images
Classifications
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K15/00—Check valves
- F16K15/02—Check valves with guided rigid valve members
- F16K15/03—Check valves with guided rigid valve members with a hinged closure member or with a pivoted closure member
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F5/00—Sewerage structures
- E03F5/04—Gullies inlets, road sinks, floor drains with or without odour seals or sediment traps
- E03F5/042—Arrangements of means against overflow of water, backing-up from the drain
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- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
- E03F7/02—Shut-off devices
- E03F7/04—Valves for preventing return flow
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/18—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float
- F16K31/20—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve
- F16K31/22—Actuating devices; Operating means; Releasing devices actuated by fluid actuated by a float actuating a lift valve with the float rigidly connected to the valve
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- 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
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K33/00—Floats for actuation of valves or other apparatus
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7287—Liquid level responsive or maintaining systems
- Y10T137/7358—By float controlled valve
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T137/00—Fluid handling
- Y10T137/7722—Line condition change responsive valves
- Y10T137/7837—Direct response valves [i.e., check valve type]
- Y10T137/7898—Pivoted valves
Definitions
- the present invention relates to a non-powered backflow prevention device, and more particularly, to a non-powered backflow prevention device installed at an end of a sewage pipe connected to a sewage pipe in a water collecting well or a hydro channel, and preventing sewage from flowing back.
- Sewage discharged to various drains such as residential facilities, agricultural facilities, public facilities, and industrial facilities is collected in the sewage wells, sewer pipes or sewage pipes, and mains sewer pipes from the basic sewage pipe, and discharged directly to the rivers and the sea, or to sewage treatment plants It is collected in sewage treatment facilities such as treatment facilities and discharged to public water such as rivers and the sea.
- the basic sewage pipes, sewage mains and trunk sewer pipes installed in the sewage treatment facilities as described above are formed to appropriate standards capable of sufficiently treating the normal sewage discharges expected at the facility or place.
- the basic sewage pipe, sewage main and trunk sewer pipes discharge the sewage in the form of a freeway with free water, but in some areas temporary rainfall or heavy rain occurs, so that the inflow of sewage per hour When it becomes more than (communication ability), it is in the condition of watering to discharge sewage in full water state without free water surface.
- the inflow that cannot be discharged to the sewer pipe overflows to the road or the ground, and at the same time, the drainage pressure of the sewage discharging houses, public facilities and industrial facilities flows back to the base sewer pipe in the low zone as the discharge pressure of the sewer pipe increases. And backwater to the sump, causing flood damage, and roads, septic tanks and other facilities are also flooded.
- the trunk sewer pipe becomes a water irrigation due to heavy rain or heavy rain in one region, or if the water level of the river rises for a short time, if the river level rises for a long time due to the rainy season, or if the sea water level of the sea rises, etc. Inundation damage occurs due to the backflow of sewage, river water or seawater to the sewage pipes or trunk sewers in the lower part of the country, or to the irrigation channels of the irrigation canals.
- the prior art is connected to the sewage pipe according to the outer diameter of the sewage pipe, and the switch is rotatably installed by a rotating shaft fixed to the inside of the connection pipe and the opening and closing of the pipe of the connection pipe, provided in the connection pipe to close the sewer pipe It consists of a switch catching jaw for seating the switch.
- the switch closes the pipeline of the connecting pipe, and when the sewage flows from the sewer pipe through the pipe of the connecting pipe, the switch is installed to be rotatable in a direction in which the sewage flows by the water pressure of the sewage. On the contrary, if the sewage flows backward, the switch is closed and is supported by the switch jaw to seal the conduit of the connection pipe.
- the present invention has been made to solve the above problems, the opening and closing door for opening and closing the pipe is always open, it is possible to easily drain the sewage regardless of the flow rate, the bulky or long length with the sewage It is an object of the present invention to provide a high-drainage, non-powered backflow prevention device that can drain quickly without clogging even when foreign substances are introduced.
- the purpose is to provide a non-powered backflow prevention device.
- the tubular shape provided with a stepped portion is formed inclined toward the discharge port, the inlet through which the sewage is introduced, the discharge port is discharged, and the inlet and the outlet communicating with the inlet A body portion of the;
- a door body which is rotatably hinged to the inside of the body part to open and close the communication port, and a pair of blocking plates that extend between both sides of the door body to block the stepped part and an inner wall of the body part; Having an opening and closing door;
- It is provided between the stepped portion and the bottom surface of the body portion, characterized in that it comprises a guide for guiding the sewage introduced from the inlet flows through the communication port to the outlet.
- a packing member for sealing between the stepped portion and the opening / closing door is provided around the stepped portion of the body portion.
- the floating body is characterized in that the buoyancy sensing groove is formed in which the reversed sewage flows.
- the non-powered backflow prevention device is connected to the distal end of the sewer pipe and is easy to install, and can drain quickly without clogging even if a large volume or long foreign substance is introduced from the sewer pipe together with the sewage.
- the opening and closing door for opening and closing the pipeline during the reverse flow of sewage can be operated by buoyancy to close the pipeline quickly to prevent the reverse flow of sewage.
- the gap between the pipeline and the door is blocked so that foreign matters such as sand, debris, and other contaminants introduced from the sewer pipe together with the sewage do not interfere with the operation of the door, thereby preventing malfunction of the door. Can be improved.
- FIG. 1 is a perspective view showing the structure of a non-powered backflow prevention device according to the present invention
- Figure 2 is a side cross-sectional view showing the structure of a non-powered backflow prevention device according to the present invention
- FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 in accordance with the present invention.
- 4 to 6 is a view showing the operating state of the non-powered backflow prevention apparatus according to the present invention
- FIG. 1 is a perspective view showing a structure of a non-powered backflow prevention apparatus according to the present invention
- Figure 2 is a side cross-sectional view showing a structure of a non-powered backflow prevention apparatus according to the present invention
- Figure 3 is a cross-sectional view of AA in accordance with the present invention. .
- the non-powered backflow prevention apparatus 100 according to the present invention, the tubular body portion 10 and the opening and closing door for opening and closing the inside of the body portion 10, the sewage flows in and out. 20, a floating body 30 provided in the opening / closing door 20, and a guide 40 for guiding the flow of sewage into the body portion 10.
- Body portion 10 is formed in a tubular body having a rectangular cross section is connected to the sewer pipe, one side is formed with an inlet 11 for inflow of sewage from the sewer pipe, the other side is formed with an outlet 13 for discharge of sewage. .
- the body portion 10 of the present embodiment may have a rectangular cross section but may also be formed as a tubular body having a polygonal, circular, or elliptical cross section.
- a stepped portion 15 which is inclined with respect to the conduit to form a communication port 17 for communicating the inlet 11 and the outlet 13. That is, the stepped portion 15 is formed in a rectangular frame shape, is installed to be inclined upward toward the outlet 13 of the body portion 10, between both side walls of the body portion 10 and both side frames of the stepped portion 15.
- the gap portions 16 are formed at predetermined intervals, respectively.
- the opening / closing door 20 is rotatably provided inside the body portion 10 to open or close the communication port 17 of the body portion 10. That is, when the sewage is discharged through the discharge port 13, the communication port 17 is opened, and when the sewage flows back to the discharge port 13, the discharge port 13 is closed.
- the opening and closing door 20 is formed in each of the door body 21 and the door body 21 which is hinged to the inside of the body portion 10, the door body 21 is extended to each of the stepped portion 15 and the body portion 10 It consists of a pair of blocking plates 25 to block between inner walls.
- the door body 21 has hinge holes 23 formed at both side portions thereof, and hinge shafts 19 are formed at the inner walls of the body portion 10 facing the hinge holes 23, respectively. It is hinged to the hinge hole 23 of the body 21. Thus, the door body 21 can be rotated about the hinge shaft 19 of the body portion 10.
- the pair of blocking plates 25 are bent upwards from both sides of the door body 21 to be in close contact with the inner wall of the body part 10, and the stepped part 15 and the body according to the rotation of the door body 21. It is inserted into the gap portion 16 between the inner wall of the portion 10 to rotate.
- the blocking plate 25 is inserted through the gap portion 16 while being in close contact with the inner wall of the body portion 10 so as to block between the stepped portion 15 and the inner wall of the body portion 10, the body portion.
- Sand, debris, and contaminants introduced with the sewage through the inlet 11 of the (10) is prevented from flowing between the door body 21 and the inner wall of the body portion 10.
- the door body 21 acts as an obstacle to closing the communication port 17 of the body part 10. to be.
- Floating body 30 has a hollow cylinder shape so as to float on the water surface, is fixed to the lower side of the opening and closing door 20, when the sewage flows back to the discharge port 13 generates buoyancy in the opening and closing door 20 to communicate with the communication port Actuate the opening and closing door 20 to close the 17.
- the floating body 30 is supported at the bottom of the body portion 10, and when the sewage flows backward through the discharge port 13, the floating body 13 is discharge port 13 Floating on the surface of the sewage introduced into the lifting door 20 to lift, thereby opening and closing the door 20 is rotated upward about the hinge axis (19).
- the door 20 is gradually rotated by the floating body 30 so as to be in close contact with the stepped portion 15 of the body portion 10 and the communication port ( 17) is completely closed.
- the stepped portion 15 restricts rotation of the closed door 20 so that the opening / closing door 20 closing the communication port 17 no longer rotates, and flows back to the edge gap of the closed opening / closing door 20. To prevent incoming sewage.
- the stepped part 15 and the opening / closing door 20 may be tightly sealed. That is, when the open door 20 rotates to close the communication port 17, the plate surface of the opening / closing door 20 is in close contact with the packing member 18 of the stepped part 15, and the stepped part 15 and the opening / closing door are closed. It is tightly sealed so that there is no gap between the 20.
- the lower surface of the floating body 30 is formed with a buoyancy sensing groove 31 having a semi-circular cross section, the sewage flowing back through the discharge port 13 flows into the buoyancy sensing groove 31, (30) can be easily floated. That is, when the sewage flowing back to the discharge port 13 flows into the buoyancy sensing groove 13 of the floating body 13, buoyancy is generated in the floating body 13 to float on the surface of the sewage.
- the guide 40 is provided between the stepped portion 15 and the bottom surface of the body portion 10, and the sewage introduced from the inlet 11 of the body portion 10 to the outlet 13 through the communication port 17. Guide it to flow. In addition, the guide 40 prevents the sewage flowing through the inlet 11 from flowing into the lower side of the opening / closing door 20, thereby preventing the opening / closing door 20 from rotating by the floating body 30 during sewage discharge. do.
- the guide 40 also serves to block the sand, debris, contaminants, etc. introduced into the sewage from the inlet so as not to enter the lower side of the opening and closing door 20.
- 4 to 6 is a view showing the operating state of the non-powered backflow prevention apparatus according to the present invention.
- the non-powered backflow prevention apparatus 100 of the present invention may be installed in a road collecting well, sewage pipe, farm waterway gate, and the like.
- the non-powered backflow prevention device 100 is connected to the distal end of the sewer pipe 50 so that sewage flows into the inlet 11 of the body portion 10 from the sewer pipe 50. Then, the introduced sewage is discharged to the discharge port 13 via the communication port 17 of the inside of the body portion 10.
- the opening and closing door 20 opens the communication port 17, the floating body 30 is the body portion 10 It is supported on the bottom of the waste water is easily discharged to the outlet 13 through the communication port (17).
- the floating body 30 floats on the surface of the sewage, lifts the opening / closing door 20, rotates around the hinge shaft 19, and flows back. To isolate the sewer;
- the plate member of the packing member 18 and the opening and closing door 20 provided around the stepped portion 15 is in close contact with each other so that the sewage flowing back through the discharge port 13 does not flow into the communication port 17. do.
- the opening and closing door 20 is supported on the bottom of the body portion 10 to communicate with the communication port ( 17 is completely open, and as shown in FIG. 4, the sewage introduced from the sewer pipe 50 is discharged through the outlet 13.
- the non-powered backflow prevention apparatus 100 of the present embodiment as described above has a body portion 10 having a square cross section, but may be formed as a body portion having a polygonal, circular, elliptical cross section in addition to the body portion 10 having a square cross section. It may include an opening and closing door, buoyancy body, guide to be formed corresponding to the body portion.
- the non-powered backflow prevention device is connected to the distal end of the sewer pipe and is easy to install, and can drain quickly without clogging even if a large volume or long foreign substance is introduced from the sewer pipe together with the sewage.
- the opening and closing door for opening and closing the pipeline during the reverse flow of sewage can be operated by buoyancy to close the pipeline quickly to prevent the reverse flow of sewage.
- the gap between the pipeline and the door is blocked so that foreign matters such as sand, debris, and other contaminants introduced from the sewer pipe together with the sewage do not interfere with the operation of the door, thereby preventing malfunction of the door. Can be improved.
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Sewage (AREA)
- Check Valves (AREA)
- Sink And Installation For Waste Water (AREA)
- Float Valves (AREA)
Abstract
Description
Claims (3)
- 하수가 유입되는 유입구와, 하수가 배출되는 배출구와, 상기 배출구를 향하여 경사지게 설치되며 상기 유입구와 배출구를 연통하는 연통구를 형성하는 단턱부가 마련된 관체 형상의 몸체부와;상기 몸체부의 내측에 회전 가능하게 힌지 결합되어 상기 연통구를 개폐하는 도어몸체와, 상기 도어몸체의 양측부에 각각 연장 형성되어 상기 단턱부와 상기 몸체부의 내벽 사이를 차단하는 한 쌍의 차단판을 갖는 개폐도어와;상기 개폐도어에 마련되어, 수면에 부유 가능하도록 속이 빈 통 형상을 가지며, 상기 하수가 상기 배출구로 역류하면 상기 개폐도어에 부력을 발생하여 상기 연통구를 폐쇄하도록 상기 개폐도어를 작동시키는 부유체와;상기 단턱부와 상기 몸체부의 바닥면 사이에 마련되어, 상기 유입구로부터 유입된 하수가 상기 연통구를 통해 상기 배출구로 유동하도록 안내하는 가이드를 포함하는 것을 특징으로 하는 무동력 역류 방지장치.
- 제 1항에 있어서,상기 몸체부의 단턱부의 둘레에는 상기 단턱부와 상기 개폐도어 사이를 밀폐하는 패킹부재가 마련되는 것을 특징으로 하는 무동력 역류 방지장치.
- 제 1항에 있어서,상기 부유체에는 역류된 하수가 유입되는 부력 감지홈이 형성된 것을 특징으로 하는 무동력 역류 방지장치.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012545857A JP5661796B2 (ja) | 2009-12-23 | 2010-12-23 | 無動力逆流防止装置 |
US13/519,026 US8939169B2 (en) | 2009-12-23 | 2010-12-23 | Unpowered apparatus for preventing backflow |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020090129993A KR101131601B1 (ko) | 2009-12-23 | 2009-12-23 | 무동력 역류 방지장치 |
KR10-2009-0129993 | 2009-12-23 |
Publications (2)
Publication Number | Publication Date |
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WO2011078604A2 true WO2011078604A2 (ko) | 2011-06-30 |
WO2011078604A3 WO2011078604A3 (ko) | 2011-11-03 |
Family
ID=44196336
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2010/009283 WO2011078604A2 (ko) | 2009-12-23 | 2010-12-23 | 무동력 역류 방지장치 |
Country Status (4)
Country | Link |
---|---|
US (1) | US8939169B2 (ko) |
JP (1) | JP5661796B2 (ko) |
KR (1) | KR101131601B1 (ko) |
WO (1) | WO2011078604A2 (ko) |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101306829B1 (ko) | 2011-09-16 | 2013-09-10 | 진두남 | 하수관거용 악취저감 가림막장치 |
KR101295928B1 (ko) * | 2011-10-25 | 2013-08-13 | 박지운 | 역류방지 및 배수성 증대를 위한 빗물 배수용 집수정 |
KR101555950B1 (ko) * | 2013-08-14 | 2015-09-25 | 인제대학교 산학협력단 | 취수관용 수문 및 이를 구비한 빗물 저류조 |
KR101488685B1 (ko) | 2014-06-30 | 2015-02-02 | 김성태 | 무동력 역류 방지 장치 |
WO2016010315A1 (ko) * | 2014-07-14 | 2016-01-21 | 김성태 | 무동력 역류 방지 장치 |
KR101530824B1 (ko) * | 2014-07-14 | 2015-06-22 | 김성태 | 무동력 역류 방지 장치 |
KR101601481B1 (ko) * | 2014-09-01 | 2016-03-08 | 현대자동차주식회사 | Scr 시스템의 우레아 과주입 방지 장치 |
KR101986731B1 (ko) | 2018-10-24 | 2019-06-07 | 김현숙 | 하수관거의 해수 역류방지장치 |
KR102267336B1 (ko) * | 2019-11-18 | 2021-06-21 | 오준민 | 하수 역류 방지구 |
CN111733962A (zh) * | 2020-06-18 | 2020-10-02 | 中冶华天工程技术有限公司 | 防倒灌装置及方法 |
CN113323125B (zh) * | 2021-06-03 | 2022-08-26 | 中电建生态环境集团有限公司 | 城市管网流体防倒灌装置 |
CN113502898B (zh) * | 2021-08-03 | 2022-10-11 | 浙江华东工程建设管理有限公司 | 一种雨污水检查井 |
KR102447229B1 (ko) * | 2021-10-01 | 2022-09-27 | 주식회사 제일엔지니어링종합건축사사무소 | 비점 오염 저감용 필터를 구비한 프리캐스트 배수 트렌치 |
JP7436439B2 (ja) * | 2021-10-04 | 2024-02-21 | フタバ産業株式会社 | 弁装置 |
CN114455682A (zh) * | 2022-02-11 | 2022-05-10 | 江苏信泰化工装备有限公司 | 一种化工污水处理设备 |
KR102488107B1 (ko) * | 2022-04-11 | 2023-01-12 | (주)명보피앤씨 | 비점오염저감시설 |
US20230332701A1 (en) * | 2022-04-14 | 2023-10-19 | A. Shane Alcorn | Passive backflow prevention apparatus and associated toilet system and method |
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KR100827566B1 (ko) * | 2007-05-03 | 2008-05-07 | 김종선 | 하수관로 역류 방지장치 |
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US714006A (en) * | 1902-02-03 | 1902-11-18 | Benjamin Menard | Trap-valve. |
US1606396A (en) * | 1922-06-09 | 1926-11-09 | Claes J Blom | Backwater valve |
JPS5934312A (ja) * | 1982-08-19 | 1984-02-24 | Kurimoto Iron Works Ltd | 転倒ゲ−トの水密保持装置 |
US4503881A (en) * | 1983-12-28 | 1985-03-12 | Vecchio Fiore M | Automatic counterbalanced sewer valve with float closure |
JPH0322334Y2 (ko) * | 1985-03-15 | 1991-05-15 | ||
JPH10252043A (ja) * | 1997-03-12 | 1998-09-22 | Kaisei Kogyo Kk | 逆流防止ゲート |
JPH11117270A (ja) * | 1997-10-09 | 1999-04-27 | Kaisei Kogyo Kk | 水路用ゲート装置 |
KR20020057894A (ko) | 2002-05-21 | 2002-07-12 | 이한욱 | 하수관로용 우수 유입 자동차단기 |
KR200390630Y1 (ko) | 2005-05-06 | 2005-07-25 | 주식회사 가림환경기술 | 부표식 자동 차단밸브 |
KR100887243B1 (ko) | 2007-09-05 | 2009-03-06 | 주식회사 퍼팩트 | 하수구용 악취 및 역류 방지장치 |
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2009
- 2009-12-23 KR KR1020090129993A patent/KR101131601B1/ko active IP Right Grant
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2010
- 2010-12-23 US US13/519,026 patent/US8939169B2/en active Active - Reinstated
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US8939169B2 (en) | 2015-01-27 |
WO2011078604A3 (ko) | 2011-11-03 |
KR20110072887A (ko) | 2011-06-29 |
JP2013515884A (ja) | 2013-05-09 |
JP5661796B2 (ja) | 2015-01-28 |
KR101131601B1 (ko) | 2012-03-30 |
US20120279586A1 (en) | 2012-11-08 |
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