CN113529662A - Hinge dam with efficient transmission link mechanism - Google Patents

Hinge dam with efficient transmission link mechanism Download PDF

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Publication number
CN113529662A
CN113529662A CN202110755358.5A CN202110755358A CN113529662A CN 113529662 A CN113529662 A CN 113529662A CN 202110755358 A CN202110755358 A CN 202110755358A CN 113529662 A CN113529662 A CN 113529662A
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CN
China
Prior art keywords
hinge dam
sets
connecting rod
groove
hinge
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Granted
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CN202110755358.5A
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Chinese (zh)
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CN113529662B (en
Inventor
刘桂兰
吴松
卢爱定
吴加国
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Jiangsu Dongke Hydraulic Machinery Co ltd
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Jiangsu Dongke Hydraulic Machinery Co ltd
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Priority to CN202110755358.5A priority Critical patent/CN113529662B/en
Publication of CN113529662A publication Critical patent/CN113529662A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/40Swinging or turning gates
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B7/00Barrages or weirs; Layout, construction, methods of, or devices for, making same
    • E02B7/20Movable barrages; Lock or dry-dock gates
    • E02B7/40Swinging or turning gates
    • E02B7/42Gates of segmental or sector-like shape with horizontal axis
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A10/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
    • Y02A10/11Hard structures, e.g. dams, dykes or breakwaters

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)
  • Hinges (AREA)

Abstract

The invention relates to the technical field of hinge dams, in particular to a hinge dam with an efficient transmission connecting rod mechanism. Ground fix with screw is in the inside of U-shaped ground, and wherein connecting plate symmetry welded fastening is on the ground, the ground upper end sets up articulated connection's hinge dam, and wherein hinge dam both ends symmetry sets up welded connection's enhancement sealing member, ground one end bilateral symmetry sets up welded connection's unable adjustment base, and wherein unable adjustment base upper end sets up screw connection's hydraulic telescoping rod, the hydraulic telescoping rod upper end sets up integrated into one piece's connecting rod, and wherein the connecting rod middle-end runs through and sets up the reference column, the reference column both ends run through the connecting plate setting respectively, and wherein carry out welded connection between reference column and the connecting plate, connecting plate one end runs through one side and sets up the content groove, and wherein connecting plate one end runs through the content groove and sets up the built-in groove, the linkage board has been placed to content groove inner.

Description

Hinge dam with efficient transmission link mechanism
Technical Field
The invention relates to the technical field of hinge dams, in particular to a hinge dam with an efficient transmission connecting rod mechanism.
Background
The hinge dam is named because the dam body panel and the foundation are connected and can be lifted under the action of the hydraulic rod and is shaped like a hinge of a door shaft. The dam is a water conservancy scientific and technological innovation achievement developed by general company of aquatic engineering in Beijing, combines the optimization of a hydraulic three-hinge point amplitude variation motion mechanism principle with a traditional sluice, is suitable for various water conservancy working conditions and geological conditions, and is widely applied to water conservancy, hydropower, water ecological civilization and urbanization construction projects such as riverway landscape, irrigation water storage, reservoir capacity expansion and the like. The technology has obtained the utility model patent that the national patent office issued to and has been listed in the advanced practical technology focus popularization instruction catalogue of water conservancy 2014 of the department of water conservancy.
The hinge dam that prior art provided, including dam facing, bottom support, pneumatic cylinder and supporting member, the dam facing with the bottom support is articulated, the pneumatic cylinder includes cylinder and piston rod, the cylinder with the bottom support is articulated, the one end of piston rod stretches into in the cylinder, the other end of piston rod with the back of dam facing is articulated, the supporting member includes support arm, supporting shoe and swinging boom, the one end of support arm with the back of dam facing is articulated, the supporting shoe sets up on the support arm, the one end of swinging boom with the cylinder is articulated, the other end of swinging boom with the support arm is articulated, wherein, the equal parallel arrangement of all articulated shafts.
Simultaneously, when the existing hinge dam utilizes a long-time hydraulic rod to transmit, the connecting part between the hydraulic rod and the hinge dam is easy to rust and is connected stably, and then the hydraulic rod can not efficiently transmit the hinge dam.
Disclosure of Invention
The invention aims to provide a hinge dam with a high-efficiency transmission connecting rod mechanism to solve the problems in the process.
In order to achieve the purpose, the invention provides the following technical scheme: a hinge dam with a high-efficiency transmission link mechanism is characterized in that foundation bolts are fixed inside a U-shaped foundation, connecting plates are symmetrically welded and fixed on the foundation, a hinge dam which is hinged and connected is arranged at the upper end of the foundation, reinforcing sealing parts which are welded and connected are symmetrically arranged at two ends of the hinge dam, fixing bases which are welded and connected are symmetrically arranged at two sides of one end of the foundation, a hydraulic telescopic rod which is connected by the bolts is arranged at the upper end of the fixing base, an integrally formed connecting rod is arranged at the upper end of the hydraulic telescopic rod, a positioning column penetrates through the middle end of the connecting rod, two ends of the positioning column respectively penetrate through the connecting plates, the positioning column and the connecting plates are welded and connected, a containing groove is formed at one end of the connecting plates, a linkage plate is placed at the inner end of the containing groove, an acting plate is placed at one side of the inner end of the containing groove, the acting plate is positioned on the outer side of the linkage plate.
Hinge dam both ends bilateral symmetry sets up welded connection's L shape briquetting, and wherein L shape briquetting is located between two enhancement sealing members, hinge dam one end bilateral symmetry sets up the sealed pad of gluing connection, and wherein the shape that sealed pad set up is T shape, sealed pad one end is located inside two L shape briquetting, and wherein sealed pad sets up the material that adopts and is anticorrosive rubber pad.
Strengthen the sealing member including holding piece, elastic rod and extrusion piece, wherein hold and be integrated into one piece's structure between piece, elastic rod and the extrusion piece, hold the welding of piece on the hinge dam, wherein the elastic rod is located the one end of holding the piece, the shape that the arc pole set up is the arc, and wherein the extrusion piece is located elastic rod one end medial flank, the one end and the sealed pad of extrusion piece contact.
The reference column runs through the setting of content groove, and wherein the both ends surface of reference column respectively with the tank bottom surface in content groove on the coplanar, the reference column both ends symmetry sets up welded connection's conflict pole, and wherein the shape that the conflict pole set up is the rhombus, the half of content groove depth degree during the length that the conflict pole set up.
The limiting ring is placed on one side of the inner end of the built-in groove, the limiting ring is in welded connection with the connecting plate, the sliding increasing ball is placed on one side of the inner end of the built-in groove, one end of the sliding increasing ball penetrates through the limiting ring, the protruding length of the sliding increasing ball is kept between four millimeters and ten millimeters, and one end of the sliding increasing ball is in contact with one end of the connecting rod.
Linkage board one end evenly sets up welded connection and places the drum, every place the angle interval between the drum and be forty degrees, the linkage board middle-end is run through and is set up first fixing screw, wherein carries out the spiro union between first fixing screw and the conflict pole.
The working plate middle end runs through and sets up second clamping screw, and wherein second clamping screw carries out the spiro union with first clamping screw's middle-end, working plate one end evenly sets up integrated into one piece's catch bar, and wherein the catch bar runs through the gangboard setting, the catch bar is located the inside of placing the drum, and wherein catch bar one end sets up integrated into one piece's position of locking piece, the position of locking piece laminating increases the setting of smooth ball, and wherein the position of locking piece inner end embedding sets up the magnet post of gluing the connection.
Compared with the prior art, the invention has the beneficial effects that:
1. through the arrangement of the hinge dam support device, contact friction can be carried out between the connecting plate and the slip increasing ball, so that when the hydraulic telescopic rod works, the connecting rod can quickly rotate and react on the positioning column and the connecting plate, and the hinge dam can be supported or retracted by the hydraulic telescopic rod efficiently;
2. through the arrangement of the positioning device, the position of the sliding ball can be quickly fixed, and meanwhile, the sliding ball can be better contacted with the connecting plate, so that the sliding contact between the connecting plate and the positioning column is favorably ensured;
3. by the arrangement of the hinge dam, the two sides of the hinge dam can be sealed in a reinforced mode through the reinforced sealing pieces while the hydraulic telescopic rod operates on the hinge dam, and the phenomenon of water leakage of the hinge dam is prevented.
Drawings
FIG. 1 is a schematic perspective view of the present invention;
FIG. 2 is a schematic top view of a hinge dam of the present invention;
FIG. 3 is a perspective view of the hydraulic telescopic rod of the present invention;
FIG. 4 is a schematic right view of a positioning post of the present invention;
FIG. 5 is a schematic semi-sectional perspective view of the connecting plate of the present invention;
FIG. 6 is an enlarged view taken at A in FIG. 2 according to the present invention;
fig. 7 is an enlarged view of the invention at B in fig. 3.
In the figure: the device comprises a U-shaped foundation 1, a foundation 2, a hinge dam 21, an L-shaped pressing block 2101, a sealing gasket 2102, a reinforcing sealing element 22, a bearing block 2201, an elastic rod 2202, an extrusion block 2203, a fixed base 23, a hydraulic telescopic rod 24, a connecting rod 25, a positioning column 26, a collision rod 2601, a connecting plate 3, an inner containing groove 31, an inner containing groove 32, a limiting ring 3201, a sliding ball 3202, a linkage plate 33, a placing cylinder 3301, a first fixing screw 3302, a working plate 34, a second fixing screw 3401, a pushing rod 3402, a locking block 3403 and a magnet column 3404.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, the present invention provides a technical solution: comprises a U-shaped foundation 1, a foundation 2 and a connecting plate 3, the foundation 2 is fixed inside the U-shaped foundation 1 by screws, wherein the connecting plate 3 is symmetrically welded and fixed on the foundation 2, a hinge dam 21 which is hinged and connected is arranged at the upper end of the foundation 2, reinforcing sealing parts 22 which are welded and connected are symmetrically arranged at two ends of the hinge dam 2, fixing bases 23 which are welded and connected are symmetrically arranged at two sides of one end of the foundation 2, a hydraulic telescopic rod 24 which is connected by screws is arranged at the upper end of the fixing base 23, an integrally formed connecting rod 25 is arranged at the upper end of the hydraulic telescopic rod 24, a positioning column 26 is arranged at the middle end of the connecting rod 25 in a penetrating way, two ends of the positioning column 26 are respectively arranged in a penetrating way through the connecting plate 3, wherein the positioning column 26 is welded and connected with the connecting plate 3, an inner containing groove 31 is arranged at one end of the connecting plate 3 in a penetrating way, an inner containing groove 32 is arranged at one end of the connecting plate 3, a linkage plate 33 is arranged at the inner end of the inner containing groove 31, wherein, a working plate 34 is arranged at one side of the inner end of the containing groove 31, and the working plate 34 is positioned at the outer side of the linkage plate 33.
In case of a change of angle of hinge dam 21, elastic rod 2202 can interfere with U-shaped foundation 1, and then elastic rod 2202 enables pressing block 2203 to press sealing gasket 2102, thereby enhancing the contact of sealing gasket 2102 with U-shaped foundation 1.
Control connecting rod 25 through hydraulic telescoping rod 24, hydraulic telescoping rod 24 can support or the operation of withdrawing to connecting plate 3 and hinge dam 21 line under the effect of connecting rod 25 and reference column 26 afterwards, and connecting rod 25 can take place angle change on reference column 26 simultaneously, under the contact of increase smooth ball 3202 and connecting rod 25 inside in addition, can make connecting rod 25 take place angle change on reference column 26 more fast.
L-shaped pressing blocks 2101 in welded connection are symmetrically arranged on two sides of two ends of the hinge dam 21, the L-shaped pressing blocks 2101 are located between two reinforcing sealing elements 22, sealing gaskets 2102 in glued connection are symmetrically arranged on two sides of one end of the hinge dam 21, the sealing gaskets 2102 are T-shaped, one ends of the sealing gaskets 2102 are located inside the two L-shaped pressing blocks 2101, and the sealing gaskets 2102 are made of anti-corrosion rubber gaskets.
The reinforced seal 22 comprises a bearing block 2201, an elastic rod 2202 and a pressing block 2203, wherein the bearing block 2201, the elastic rod 2202 and the pressing block 2203 are all of an integrally formed structure, the bearing block 2201 is welded on the hinge dam 21, the elastic rod 2202 is located at one end of the bearing block 2201, the arc-shaped rod 2202 is arranged in an arc shape, the pressing block 2203 is located in the middle of one end of the elastic rod 2202, and one end of the pressing block 2203 is in contact with a sealing gasket 2102.
The positioning post 26 penetrates through the containing groove 31, wherein two end surfaces of the positioning post 26 are respectively on the same plane with the bottom surface of the containing groove 31, two ends of the positioning post 26 are symmetrically provided with the touch levers 2601 which are connected in a welding manner, wherein the touch levers 2601 are diamond-shaped, and the setting length of the touch levers 2601 is half of the groove depth of the containing groove 31.
A limiting circular ring 3201 is placed on one side of the inner end of the built-in groove 32, the limiting circular ring 3201 is in welding connection with the connecting plate 3, a sliding ball 3202 is placed on one side of the inner end of the built-in groove 32, one end of the sliding ball 3202 penetrates through the limiting circular ring 3201, the protruding length of the sliding ball 3202 is kept between four and ten millimeters, and one end of the sliding ball 3202 is in contact with one end of the connecting rod 25.
The linkage plate 33 one end evenly sets up welded connection and places drum 3301, and the section of thick bamboo diameter of placing drum 3301 setting is the same with the ball diameter of slip ball 3202, and the angle interval between 01 is forty degrees, and linkage plate 33 middle-end is run through and is set up first set screw 3302, wherein carries out the spiro union between first set screw 3302 and the conflict pole 2601.
The middle end of the acting plate 34 is penetrated and provided with a second fixing screw 3401, wherein the second fixing screw 3401 is screwed with the middle end of the first fixing screw 3302, one end of the acting plate 34 is uniformly provided with an integrally formed push rod 3402, wherein the push rod 3402 is penetrated and provided with a linkage plate 33, the push rod 3402 is positioned in the cylinder 3301, one end of the push rod 3402 is provided with an integrally formed locking block 3403, the locking block 3403 is attached to the sliding ball 3202, and the inner end of the locking block 3403 is embedded with a magnet column 3404 connected with glue.
The working principle is as follows: the connecting rod 25 is controlled through the hydraulic telescopic rod 24, then the hydraulic telescopic rod 24 can support or retract the connecting plate 3 and the hinge dam 21 under the action of the connecting rod 25 and the positioning column 26, meanwhile, the connecting rod 25 can generate angle change on the positioning column 26, in addition, under the contact between the slip-increasing round ball 3202 and the inside of the connecting rod 25, the connecting rod 25 can generate angle change on the positioning column 26 more quickly, meanwhile, the slip-increasing round ball 3202 can limit the position of the connecting rod 25, the phenomenon of position offset of the connecting rod 25 is prevented, further, under the condition of the angle change of the hinge dam 21, the elastic rod 2202 can collide against the U-shaped foundation 1, then the elastic rod 2202 enables the extrusion block 2203 to extrude the sealing gasket 2102, further, the contact of the sealing gasket 2102 against the U-shaped foundation 1 is strengthened, the purpose of sealing the hinge dam 21 is achieved, and in addition, the linkage plate 33 and the acting plate 34 are both placed inside the content groove 31, meanwhile, the position of the built-in groove 32 is probed by the aid of the pushing rod 3402, the position for placing the cylinder 3301 is the same as that of the built-in groove 32, the linkage plate 33 is fixed in position by the aid of the first fixing screw 3302, the acting plate 34 is further pushed, the pushing rod 3402 pushes the locking block 3403, the sliding ball 3202 adsorbed on the magnet column 3404 can enter the built-in groove 32, the sliding ball 3202 can extend out of one end of the limiting ring 3201 under the pushing of the pushing rod 3402 and is in contact with one end of the connecting rod 25, and the acting plate 34 is fixed by the aid of the second fixing screw 3401.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims (7)

1. The utility model provides a hinge dam of high-efficient transmission link mechanism in area, includes U-shaped ground (1), ground (2) and connecting plate (3), its characterized in that: the foundation (2) is fixed in the U-shaped foundation (1) through screws, the connecting plates (3) are symmetrically welded and fixed on the foundation (2), the upper end of the foundation (2) is provided with a hinge dam (21) in hinged connection, the two ends of the hinge dam (2) are symmetrically provided with reinforcing sealing parts (22) in welded connection, the two sides of one end of the foundation (2) are symmetrically provided with a fixing base (23) in welded connection, the upper end of the fixing base (23) is provided with a hydraulic telescopic rod (24) in screw connection, the upper end of the hydraulic telescopic rod (24) is provided with an integrally formed connecting rod (25), the middle end of the connecting rod (25) is provided with a positioning column (26) in a penetrating way, the two ends of the positioning column (26) are respectively provided with the connecting plates (3) in a penetrating way, the positioning column (26) is connected with the connecting plates (3) in a welding way, one end of the connecting plates (3) is provided with an inner containing groove (31) in a penetrating way, one end of the connecting plate (3) penetrates through the containing groove (31) to form a built-in groove (32), a linkage plate (33) is arranged at the inner end of the containing groove (31), a working plate (34) is arranged on one side of the inner end of the containing groove (31), and the working plate (34) is located on the outer side of the linkage plate (33).
2. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 1, wherein: hinge dam (21) both ends bilateral symmetry sets up welded connection's L shape briquetting (2101), and wherein L shape briquetting (2101) are located between two enhancement sealing member (22), hinge dam (21) one end bilateral symmetry sets up gluey sealed pad (2102) of connecting, and wherein the shape that sealed pad (2102) set up is the T shape, sealed pad (2102) one end is located inside two L shape briquetting (2101), and wherein sealed pad (2102) set up the material of adoption for the rubber pad of anticorrosion.
3. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 2, wherein: the reinforced sealing element (22) comprises a bearing block (2201), an elastic rod (2202) and an extrusion block (2203), wherein the bearing block (2201), the elastic rod (2202) and the extrusion block (2203) are of an integrally formed structure, the bearing block (2201) is welded on the hinge dam (21), the elastic rod (2202) is located at one end of the bearing block (2201), the arc-shaped rod (2202) is arc-shaped, the extrusion block (2203) is located in the middle of one end of the elastic rod (2202), and one end of the extrusion block (2203) is in contact with the sealing gasket (2102).
4. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 1, wherein: the positioning column (26) penetrates through the content groove (31) and is arranged, wherein the two end surfaces of the positioning column (26) are respectively arranged on the same plane with the bottom surface of the content groove (31), two ends of the positioning column (26) are symmetrically provided with touch rods (2601) in welded connection, the touch rods (2601) are arranged in a rhombic shape, and the depth of the content groove (31) is half of the depth of the touch rods (2601).
5. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 1, wherein: limiting circular rings (3201) are placed on one side of the inner end of the built-in groove (32), welding connection is conducted between the limiting circular rings (3201) and the connecting plate (3), sliding ball bodies (3202) are placed on one side of the inner end of the built-in groove (32), one end of each sliding ball body (3202) penetrates through the limiting circular ring (3201), the protruding length of each sliding ball body (3202) is kept between four millimeters and ten millimeters, and one end of each sliding ball body (3202) is in contact with one end of the connecting rod (25).
6. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 1, wherein: linkage board (33) one end evenly sets up welded connection and places drum (3301), every place the angle interval between drum (3301) and be forty degrees, linkage board (33) middle-end is run through and is set up first fixed screw (3302), wherein carries out the spiro union between first fixed screw (3302) and conflict pole (2601).
7. The hinge dam with the high-efficiency transmission connecting rod mechanism as claimed in claim 1, wherein: do work board (34) middle-end runs through and sets up second fixing screw (3401), wherein second fixing screw (3401) carries out the spiro union with the middle-end of first fixing screw (3302), do work board (34) one end evenly sets up integrated into one piece's catch bar (3402), wherein catch bar (3402) runs through linkage board (33) setting, catch bar (3402) are located the inside of placing drum (3301), wherein catch bar (3402) one end sets up integrated into one piece's lock position piece (3403), lock position piece (3403) laminating increases smooth ball (3202) setting, wherein lock position piece (3403) inner embedding sets up gluey magnet post (3404) of connecting.
CN202110755358.5A 2021-07-05 2021-07-05 Hinge dam with transmission link mechanism Active CN113529662B (en)

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Application Number Priority Date Filing Date Title
CN202110755358.5A CN113529662B (en) 2021-07-05 2021-07-05 Hinge dam with transmission link mechanism

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CN113529662B CN113529662B (en) 2022-07-12

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT7921605A0 (en) * 1979-04-05 1979-04-05 Pirelli Furlanis DEVICE FOR LOWERING AND RAISING COLLAPSIBLE DAMS.
CN205171466U (en) * 2015-12-07 2016-04-20 北京中水科工程总公司 Welding bottom support on integral hinge dam
CN205676850U (en) * 2016-06-03 2016-11-09 郑州市佳霖科技有限公司 A kind of shunting hydraulic pressure dam
CN107178071A (en) * 2017-04-25 2017-09-19 北京赛旺特科技发展有限公司 A kind of hinge dam
CN206800342U (en) * 2017-03-21 2017-12-26 上海东泽水务科技股份有限公司 A kind of end face seal structure between rotatable door leaf
CN211256908U (en) * 2019-09-04 2020-08-14 河北禹建水工机械有限公司 High-strength hydraulic dam

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT7921605A0 (en) * 1979-04-05 1979-04-05 Pirelli Furlanis DEVICE FOR LOWERING AND RAISING COLLAPSIBLE DAMS.
CN205171466U (en) * 2015-12-07 2016-04-20 北京中水科工程总公司 Welding bottom support on integral hinge dam
CN205676850U (en) * 2016-06-03 2016-11-09 郑州市佳霖科技有限公司 A kind of shunting hydraulic pressure dam
CN206800342U (en) * 2017-03-21 2017-12-26 上海东泽水务科技股份有限公司 A kind of end face seal structure between rotatable door leaf
CN107178071A (en) * 2017-04-25 2017-09-19 北京赛旺特科技发展有限公司 A kind of hinge dam
CN211256908U (en) * 2019-09-04 2020-08-14 河北禹建水工机械有限公司 High-strength hydraulic dam

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