WO2001032991A1 - Constitution method of automatic flood-gate of discharge type in the lower part - Google Patents

Constitution method of automatic flood-gate of discharge type in the lower part Download PDF

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Publication number
WO2001032991A1
WO2001032991A1 PCT/KR2000/001266 KR0001266W WO0132991A1 WO 2001032991 A1 WO2001032991 A1 WO 2001032991A1 KR 0001266 W KR0001266 W KR 0001266W WO 0132991 A1 WO0132991 A1 WO 0132991A1
Authority
WO
WIPO (PCT)
Prior art keywords
water gate
water
cylinder
gate body
canal
Prior art date
Application number
PCT/KR2000/001266
Other languages
French (fr)
Inventor
Sang Kwan Han
Original Assignee
Sang Kwan Han
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
Priority claimed from KR1019990048692A external-priority patent/KR20000006808A/en
Application filed by Sang Kwan Han filed Critical Sang Kwan Han
Priority to AU11775/01A priority Critical patent/AU1177501A/en
Publication of WO2001032991A1 publication Critical patent/WO2001032991A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
    • E02B8/04—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates
    • E02B8/045—Valves, slides, or the like; Arrangements therefor; Submerged sluice gates automatically movable
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20—Movable barrages; Lock or dry-dock gates
    • E02B7/205—Barrages controlled by the variations of the water level; automatically functioning barrages
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02B—HYDRAULIC ENGINEERING
    • E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20—Movable barrages; Lock or dry-dock gates
    • E02B7/40—Swinging or turning gates
    • E02B7/44—Hinged-leaf gates

Definitions

  • the present invention relates to a water gate, more specifically an automatic water gate, which is installed in an underwater dam or a canal such as an irrigation canal of a river or a relatively small reservoir so as to maintain a stored water level within a certain extent.
  • An underwater dam is a concrete structure constructed along a width of a river to maintain a water level of an upper stream over a certain extent, and drainage through the underwater dam is achieved by overflowing over an upper end of the underwater dam.
  • a water gate is installed in the underwater dam or a canal of a reservoir/river.
  • the water gate of prior art installed in the underwater or a canal of a reservoir/river mostly, has an elevation-adjusting handle for moving the water gate up and down at an upper part thereof, and is opened and closed by rotating the elevation- adjusting handle.
  • this water gate is opened and closed by human power. much strength is needed.
  • water overflow is caused or water over a proper amount is discharged.
  • the present invention is contemplated to solve the aforementioned problem, and it is an object of the present invention to provide an provide the automatic water gate, in which according to the water level detection of a sensor, the opening and closing operation is performed automatically by a cylinder and winch so that the stored water level is maintained within a certain extent and a lower part of the stored water is drained easily in opened state, the opening and closing operation is performed easily even if a sand and gravel are piled up on the bottom of a water stored side adjacent to the water gate body, the draining operation is carried out rapidly, and especially the water gate body damage due to the impact of stones and trees is prevented.
  • an automatic water gate comprising: a pair of walls constructed with a predetermined distance to both sides of a canal; a supporter fixed uprightly to the canal side surface of each wall; a water gate body having a hollow or vacuumed rectangular shape and a rotation shaft provided with both upper sides thereof, the water gate body being disposed between each wall in order that a stored water sided surface forms a right angle or an acute angle to a bottom of the canal, the rotation shaft being coupled in the supporter rotatively; a cylinder for moving up and down the water gate body about the rotation shaft, an upper part of the cylinder being coupled rotatively to a side surface of the supporter, a lower part of the cylinder being coupled rotatively to a side surface of the water gate body; and a sensor for detecting a
  • the water gate body rotates about the rotation shaft and is opened and closed automatically by expanding and retracting a rod in the cylinder, according to the water level detection of the sensor.
  • FIG. 1 is a perspective view of an automatic water gate according to the first embodiment of the present invention
  • FIG. 2 is a side view of a closed state of the automatic water gate according to the first embodiment of the present invention
  • FIG. 3 is a side view of a opened state of the automatic water gate according to the first embodiment of the present invention
  • FIG. 4 is a detailed view of a frame and packing of the present invention
  • FIG. 5 is a perspective view of the automatic water gate according to the second embodiment of the present invention.
  • FIG. 6 is a side view of closed state of the automatic water gate according to the second embodiment of the present invention.
  • FIG. 1 illustrates a perspective view of an automatic water gate according to the first embodiment of the present invention
  • FIG. 2 and FIG. 3 illustrate a side view of the automatic water gate WG according to the first embodiment of the present invention.
  • a reference numeral 1 is a concrete structure built with a predetermined distance to both sides of a irrigation canal (referred to as "a canal" below) of a small reservoir or river, or a wall having a shortened length in the underwater dam.
  • a supporter 2 is fixed uprightly to support a water gate body 3 described below to a canal side surface of the wall 1.
  • the water gate body 3 in the supporter 2 is material having buoyancy, or is a hollow or vacuumed rectangular shape even if it is not made of material having a buoyancy.
  • a rotation shaft 3a is provided with both upper sides, and a packing 3b is fixed to an end portion of a stored water sided surface.
  • the water gate body 3 is disposed in the supporter 2 so that the stored water sided surface forms a right angle or an acute angle to a bottom of the canal, and the rotation shaft 3 a is coupled in the supporter 2 rotatively.
  • the packing 3b provided with the end portion in the stored water sided surface of the water gate body 3. is stuck to a frame 4 for sealing operation.
  • the water gate body 3 is opened and closed by a cylinder 5, rotating about the rotation shaft 3a.
  • An upper part of the cylinder 5 is hinged rotatively to the upper part of
  • the supporter 2 and a lower part of the cylinder 5 is coupled rotatively to a side part of the water gate body 3.
  • a reference numeral 6 is a sensor for detecting the water level of the stored water.
  • the operation that the water level is adjusted automatically by the automatic water gate (WG) of the first embodiment is as follows.
  • the cylinder 5 maintains expanded state as shown in FIG. 2. and at the same time closed state in which the lower part of the water gate body 3 is in contact with the bottom of the canal is maintained so that water storing process is initiated.
  • the cylinder 5 When the water level approaches the height of the wall 1 with the continuous water string process, the cylinder 5 is retracted as shown in FIG. 3, and the lower part of the water gate body 3 rotates upwardly to a draining water side about the rotation shaft 3 a so that the water draining operation is performed.
  • a draining area which is formed between the stored water sided surface of the water gate body 3 and the bottom of the canal, is maximized so that drainage is performed rapidly, and stones, trees and the like pass beneath the water gate body 3. so that the water gate body 3 is not damaged.
  • the opening operation of the water gate body 3 is not disturbed anyway, although a sand and gravel are piled up on the bottom of the stored water sided canal adjacent to the water gate body 3.
  • the operation of the cylinder 5 is carried out by the water level detection of the sensor 6 provided with the water stored side, and maintains the stored water level within a certain extent by opening and closing the water
  • the first embodiment of the present discloses only the preferred one, and does not limit the spirit of the present invention.
  • a groove 32 is formed in the upper side part of the water gate body 30.
  • a cylinder 50 is accommodated in the groove 32, an upper and a lower part of the cylinder 50 is coupled rotatively to the side part of the supporter 2 and water gate body 30, and the groove 32 is closed to be opend and closed by a cover member 33.
  • a rotation shaft 31 is provided to an upper part of the water gate body 30, and this rotation shaft 31 is coupled to the supporter 2 rotatively. It is apparent that these modifications fall into the scope of the present invention.
  • a rubber cover is mounted to the outside of the cylinder 50 as the means for protecting the cylinder and rod, so that the cylinder is not worn by the sand and gravel.
  • the water gate WG' maintains the stored water level within a certain extent constantly by the repeated opening and closing operation similar to that of the first embodiment, and also increases the durability of the cylinder 50 as the cylinder 50 is accommodated and protected in the groove 32 of the water gate body 30.
  • apparatus for opening and closing the water gate by rotating the rotation shaft provided to both sides of the water gate
  • apparatus for opening and closing the water gate is constructed in order that the draining operation is performed through the lower part of the water gate, using various known means such as a rotary actuator. Therefore, although other means are applied to rotate the water gate, this is included within the scope of the present invention.
  • the water gate body is disposed in the wall constructed in the canal to form an acute angle to the canal bottom, the upper part of the water gate is coupled rotatively, and the lower part thereof moves up and down about the rotation shaft by the cylinder. Also, the cylinder operates by the detection of the water level in the sensor provided to the water stored side.
  • the opening and closing operation is performed automatically by the water level detection of the sensor. Also, since a lower part of the stored water is drained easily through the drain area formed between the stored water sided surface of the water gate body and the bottom of the canal in the opened state, the red tide and green tide is prevented.
  • the opening operation is performed easily, although a sand and gravel are piled up on the bottom of the stored water sided canal adjacent to the water gate body. Since water is drained through the lower part of the water gate, a draining area is maximized so that drainage is performed rapidly and the water gate body is not damaged by the impact of stones, trees and the like.
  • contaminants of light specific gravity is thrust by contaminants of heavy specific gravity located in the lower part of the water gate and floats around the upper end of the water gate. During that, contaminants are resolved by photosynthesis of the sun light, friction effect of the convention layer, resolving effect of a microbe, and dissolved oxygen, and resolved contaminants is drained selectively.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Barrages (AREA)

Abstract

The present invention relates to an automatic water gate which is installed in a canal such as an irrigation canal of a river or a relatively small reservoir so as to maintain a stored water level within a certain extent, and an object thereof is to provide the automatic water gate, in which according to the water level detection of a sensor, the opening and closing operation is performed automatically by a cylinder and winch so that the stored water level is maintained within a certain extent and a lower part of the stored water is drained easily in opened state, the opening and closing operation is performed easily even if a sand and gravel are piled up on the bottom of a water stored side adjacent to the water gate body, the draining operation is carried out rapidly, and especially the water gate body damage due to the impact of stones and trees is prevented.

Description

Constitution method of automatic flood-gate of discharge type in the lower part
Technical Field The present invention relates to a water gate, more specifically an automatic water gate, which is installed in an underwater dam or a canal such as an irrigation canal of a river or a relatively small reservoir so as to maintain a stored water level within a certain extent.
Background Art
An underwater dam is a concrete structure constructed along a width of a river to maintain a water level of an upper stream over a certain extent, and drainage through the underwater dam is achieved by overflowing over an upper end of the underwater dam.
Therefore, in the underwater dam, an upper part of stored water remains continuously and substances such as various heavy metals in water are piled up so that a red tide or green tide is occurred. Also, since the underwater dam itself disturbs a smooth draining in flood, a river may overflows and a riverbank may be washed away.
Meanwhile, to solve the above problem of the underwater dam and manage the water level of a reservoir, a water gate is installed in the underwater dam or a canal of a reservoir/river.
However, the water gate of prior art installed in the underwater or a canal of a reservoir/river mostly, has an elevation-adjusting handle for moving the water gate up and down at an upper part thereof, and is opened and closed by rotating the elevation- adjusting handle. However, when this water gate is opened and closed by human power. much strength is needed. Also when the water gate is not opened and closed properly, water overflow is caused or water over a proper amount is discharged.
Disclosure of Invention The present invention is contemplated to solve the aforementioned problem, and it is an object of the present invention to provide an provide the automatic water gate, in which according to the water level detection of a sensor, the opening and closing operation is performed automatically by a cylinder and winch so that the stored water level is maintained within a certain extent and a lower part of the stored water is drained easily in opened state, the opening and closing operation is performed easily even if a sand and gravel are piled up on the bottom of a water stored side adjacent to the water gate body, the draining operation is carried out rapidly, and especially the water gate body damage due to the impact of stones and trees is prevented.
To accomplish the above object, it is provided an automatic water gate comprising: a pair of walls constructed with a predetermined distance to both sides of a canal; a supporter fixed uprightly to the canal side surface of each wall; a water gate body having a hollow or vacuumed rectangular shape and a rotation shaft provided with both upper sides thereof, the water gate body being disposed between each wall in order that a stored water sided surface forms a right angle or an acute angle to a bottom of the canal, the rotation shaft being coupled in the supporter rotatively; a cylinder for moving up and down the water gate body about the rotation shaft, an upper part of the cylinder being coupled rotatively to a side surface of the supporter, a lower part of the cylinder being coupled rotatively to a side surface of the water gate body; and a sensor for detecting a
water level of the stored water, In the present invention the water gate body rotates about the rotation shaft and is opened and closed automatically by expanding and retracting a rod in the cylinder, according to the water level detection of the sensor.
Brief Description of Drawings
The features and advantages of the present invention will be more described specifically in the following description of preferred embodiments of the invention with reference to the accompanying drawings wherein:
FIG. 1 is a perspective view of an automatic water gate according to the first embodiment of the present invention;
FIG. 2 is a side view of a closed state of the automatic water gate according to the first embodiment of the present invention;
FIG. 3 is a side view of a opened state of the automatic water gate according to the first embodiment of the present invention; FIG. 4 is a detailed view of a frame and packing of the present invention;
FIG. 5 is a perspective view of the automatic water gate according to the second embodiment of the present invention; and
FIG. 6 is a side view of closed state of the automatic water gate according to the second embodiment of the present invention.
Best Mode for Carrying Out the Invention
Reference will now be made in detail to the embodiment of the present invention and examples of which are illustrated in the accompanying drawings. In explaining the present invention, the same names and reference numerals will be given to the same components, and explanations in the same will be omitted.
FIG. 1 illustrates a perspective view of an automatic water gate according to the first embodiment of the present invention, and FIG. 2 and FIG. 3 illustrate a side view of the automatic water gate WG according to the first embodiment of the present invention. A reference numeral 1 is a concrete structure built with a predetermined distance to both sides of a irrigation canal (referred to as "a canal" below) of a small reservoir or river, or a wall having a shortened length in the underwater dam.
A supporter 2 is fixed uprightly to support a water gate body 3 described below to a canal side surface of the wall 1. The water gate body 3 in the supporter 2 is material having buoyancy, or is a hollow or vacuumed rectangular shape even if it is not made of material having a buoyancy. Also, a rotation shaft 3a is provided with both upper sides, and a packing 3b is fixed to an end portion of a stored water sided surface.
The water gate body 3 is disposed in the supporter 2 so that the stored water sided surface forms a right angle or an acute angle to a bottom of the canal, and the rotation shaft 3 a is coupled in the supporter 2 rotatively. In closed state of the water gate body 3. the packing 3b provided with the end portion in the stored water sided surface of the water gate body 3. is stuck to a frame 4 for sealing operation.
The water gate body 3 is opened and closed by a cylinder 5, rotating about the rotation shaft 3a. An upper part of the cylinder 5 is hinged rotatively to the upper part of
the supporter 2, and a lower part of the cylinder 5 is coupled rotatively to a side part of the water gate body 3.
Due to the structure described above, with expanding or retracting the cylinder 5, a lower part of the water gate 3 is opened and closed by rotating about the rotation shaft 3a.
A reference numeral 6 is a sensor for detecting the water level of the stored water. The operation that the water level is adjusted automatically by the automatic water gate (WG) of the first embodiment is as follows. When the stored water level is low, the cylinder 5 maintains expanded state as shown in FIG. 2. and at the same time closed state in which the lower part of the water gate body 3 is in contact with the bottom of the canal is maintained so that water storing process is initiated.
When the water level approaches the height of the wall 1 with the continuous water string process, the cylinder 5 is retracted as shown in FIG. 3, and the lower part of the water gate body 3 rotates upwardly to a draining water side about the rotation shaft 3 a so that the water draining operation is performed. In opened state of the water gate body 3, a draining area which is formed between the stored water sided surface of the water gate body 3 and the bottom of the canal, is maximized so that drainage is performed rapidly, and stones, trees and the like pass beneath the water gate body 3. so that the water gate body 3 is not damaged. In addition, as the water gate body 3 is opened by rotating upwardly to a water draining side, the opening operation of the water gate body 3 is not disturbed anyway, although a sand and gravel are piled up on the bottom of the stored water sided canal adjacent to the water gate body 3. In the first embodiment described above, the operation of the cylinder 5 is carried out by the water level detection of the sensor 6 provided with the water stored side, and maintains the stored water level within a certain extent by opening and closing the water
gate body 3 repeatedly.
The first embodiment of the present discloses only the preferred one, and does not limit the spirit of the present invention.
That is. as shown in FIG. 5, in the present invention a groove 32 is formed in the upper side part of the water gate body 30. a cylinder 50 is accommodated in the groove 32, an upper and a lower part of the cylinder 50 is coupled rotatively to the side part of the supporter 2 and water gate body 30, and the groove 32 is closed to be opend and closed by a cover member 33. Also, a rotation shaft 31 is provided to an upper part of the water gate body 30, and this rotation shaft 31 is coupled to the supporter 2 rotatively. It is apparent that these modifications fall into the scope of the present invention.
Additionally, a rubber cover is mounted to the outside of the cylinder 50 as the means for protecting the cylinder and rod, so that the cylinder is not worn by the sand and gravel.
The water gate WG' according to the modification of the present invention maintains the stored water level within a certain extent constantly by the repeated opening and closing operation similar to that of the first embodiment, and also increases the durability of the cylinder 50 as the cylinder 50 is accommodated and protected in the groove 32 of the water gate body 30.
Further, in constructing a apparatus for opening and closing the water gate by rotating the rotation shaft provided to both sides of the water gate, apparatus for opening and closing the water gate is constructed in order that the draining operation is performed through the lower part of the water gate, using various known means such as a rotary actuator. Therefore, although other means are applied to rotate the water gate, this is included within the scope of the present invention.
Also, there are various means for opening and closing the water gate which installed in a right or acute angle, by a hydraulic cylinder, or other hydraulic means using a screw and rack gear. Therefore, all other water gate, which drains water to the extent flowing in through the lower part thereof, is included in the scope of the present invention apparently.
The Industrial Applicability
In the present invention, the water gate body is disposed in the wall constructed in the canal to form an acute angle to the canal bottom, the upper part of the water gate is coupled rotatively, and the lower part thereof moves up and down about the rotation shaft by the cylinder. Also, the cylinder operates by the detection of the water level in the sensor provided to the water stored side.
Therefore, in the water gate of the present invention, the opening and closing operation is performed automatically by the water level detection of the sensor. Also, since a lower part of the stored water is drained easily through the drain area formed between the stored water sided surface of the water gate body and the bottom of the canal in the opened state, the red tide and green tide is prevented.
As the water gate body of the present invention is opened by rotating upwardly to a water draining side, the opening operation is performed easily, although a sand and gravel are piled up on the bottom of the stored water sided canal adjacent to the water gate body. Since water is drained through the lower part of the water gate, a draining area is maximized so that drainage is performed rapidly and the water gate body is not damaged by the impact of stones, trees and the like.
Due to the draining operation of water through the lower part of the water gate,
contaminants of light specific gravity is thrust by contaminants of heavy specific gravity located in the lower part of the water gate and floats around the upper end of the water gate. During that, contaminants are resolved by photosynthesis of the sun light, friction effect of the convention layer, resolving effect of a microbe, and dissolved oxygen, and resolved contaminants is drained selectively.
As proved in a Bernoulli's theorem, the material of the light specific gravity is swept way together with the material of heavy specific gravity, which flows rapidly.
That is, the contaminants resolved naturally is swept way in drained water which has heavy specific gravity relatively and is less contaminated so that the secondary resolving effect is occurred.

Claims

Claims
1. An automatic water gate comprising: a pair of walls constructed with a predetermined distance to both sides of a
canal; a supporter fixed uprightly to the canal side surface of each wall; a water gate body having a hollow or vacuumed rectangular shape and a rotation shaft provided with both upper sides thereof, the water gate body being disposed between each wall in order that a stored water sided surface forms a right angle or an acute angle to a bottom of the canal, the rotation shaft being coupled in the supporter rotatively; a cylinder for moving up and down the water gate body about the rotation shaft, an upper part of the cylinder being coupled rotatively to a side surface of the supporter, a lower part of the cylinder being coupled rotatively to a side surface of the water gate body; and a sensor for detecting a water level of the stored water, wherein according to the water level detection of the sensor, the water gate body rotates about the rotation shaft, is opened and closed automatically by expanding and retracting a rod in the cylinder, and drains water selectively to the extent flowing in through the lower part thereof.
2. An automatic water gate according to claim 1, wherein a groove is formed in the upper side part of the water gate body, a cylinder is accommodated in the groove, the groove is closed to be opened and closed by a cover member, and an upper and the lower part of the cylinder is coupled rotatively to the side part of the supporter.
3. An automatic water gate according to claim 1, wherein adjusting the lower part of the water gate selectively so that a draining area is formed accordingly.
4. An automatic water gate according to claim 1 , wherein as power supply is suspended, pressure in pipeline to the cylinder is removed selectively so that the water gate is lifted automatically by water pressure and buoyancy.
PCT/KR2000/001266 1999-11-04 2000-11-04 Constitution method of automatic flood-gate of discharge type in the lower part WO2001032991A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU11775/01A AU1177501A (en) 1999-11-04 2000-11-04 Constitution method of automatic flood-gate of discharge type in the lower part

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1019990048692A KR20000006808A (en) 1999-01-21 1999-11-04 Automatic watergate
KR1999/48692 1999-11-04
KR20000058622 2000-10-02
KR2000/58622 2000-10-02

Publications (1)

Publication Number Publication Date
WO2001032991A1 true WO2001032991A1 (en) 2001-05-10

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ID=26636279

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2000/001266 WO2001032991A1 (en) 1999-11-04 2000-11-04 Constitution method of automatic flood-gate of discharge type in the lower part

Country Status (2)

Country Link
AU (1) AU1177501A (en)
WO (1) WO2001032991A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011149225A2 (en) * 2010-05-23 2011-12-01 Han Sangkwan Multifunctional movable-weir sluice gate system for purifying contaminated river water
CN103215930A (en) * 2013-04-17 2013-07-24 河海大学 Herringbone gate with bidirectional water head adapting function
JP6347876B1 (en) * 2017-08-02 2018-06-27 旭イノベックス株式会社 Multi-point support type flap gate
CN108301386A (en) * 2018-04-24 2018-07-20 李红星 It is a kind of to realize immediately from the upper-turn-type dam sluice gate of locking control
CN113404013A (en) * 2021-07-26 2021-09-17 苏子文 Be used for irrigated area ecological floodgate of economizing on water

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110670551A (en) * 2019-09-30 2020-01-10 深圳春沐源控股有限公司 Water supply building

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109814A (en) * 1984-11-02 1986-05-28 Hitachi Zosen Corp Gate guide trench structure for sluice and valve
JPH0365723U (en) * 1989-10-31 1991-06-26
JPH07206394A (en) * 1994-01-21 1995-08-08 Sanko Seisakusho:Kk Liquid jack
JPH07207648A (en) * 1994-01-21 1995-08-08 Sanko Seisakusho:Kk Inverted watergate equipment
KR19980041825U (en) * 1996-12-24 1998-09-25 김영귀 Bumper face reinforcement structure for vehicle

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61109814A (en) * 1984-11-02 1986-05-28 Hitachi Zosen Corp Gate guide trench structure for sluice and valve
JPH0365723U (en) * 1989-10-31 1991-06-26
JPH07206394A (en) * 1994-01-21 1995-08-08 Sanko Seisakusho:Kk Liquid jack
JPH07207648A (en) * 1994-01-21 1995-08-08 Sanko Seisakusho:Kk Inverted watergate equipment
KR19980041825U (en) * 1996-12-24 1998-09-25 김영귀 Bumper face reinforcement structure for vehicle

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011149225A2 (en) * 2010-05-23 2011-12-01 Han Sangkwan Multifunctional movable-weir sluice gate system for purifying contaminated river water
WO2011149225A3 (en) * 2010-05-23 2012-05-03 Han Sangkwan Multifunctional movable-weir sluice gate system for purifying contaminated river water
CN103215930A (en) * 2013-04-17 2013-07-24 河海大学 Herringbone gate with bidirectional water head adapting function
CN103215930B (en) * 2013-04-17 2015-04-08 河海大学 Herringbone gate with bidirectional water head adapting function
JP6347876B1 (en) * 2017-08-02 2018-06-27 旭イノベックス株式会社 Multi-point support type flap gate
CN108301386A (en) * 2018-04-24 2018-07-20 李红星 It is a kind of to realize immediately from the upper-turn-type dam sluice gate of locking control
CN108301386B (en) * 2018-04-24 2020-03-13 李红星 Upturning dam gate capable of realizing instant self-locking control
CN113404013A (en) * 2021-07-26 2021-09-17 苏子文 Be used for irrigated area ecological floodgate of economizing on water
CN113404013B (en) * 2021-07-26 2022-11-22 苏子文 Be used for irrigated area ecological floodgate of economizing on water

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