KR20150134854A - Open and close typed floodgate apparatus having maintaining balance apparatus of floodgate - Google Patents

Open and close typed floodgate apparatus having maintaining balance apparatus of floodgate Download PDF

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Publication number
KR20150134854A
KR20150134854A KR1020140062209A KR20140062209A KR20150134854A KR 20150134854 A KR20150134854 A KR 20150134854A KR 1020140062209 A KR1020140062209 A KR 1020140062209A KR 20140062209 A KR20140062209 A KR 20140062209A KR 20150134854 A KR20150134854 A KR 20150134854A
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KR
South Korea
Prior art keywords
water
sides
watercourse
gate
water gate
Prior art date
Application number
KR1020140062209A
Other languages
Korean (ko)
Inventor
황현진
Original Assignee
황현진
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 황현진 filed Critical 황현진
Priority to KR1020140062209A priority Critical patent/KR20150134854A/en
Publication of KR20150134854A publication Critical patent/KR20150134854A/en

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    • 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
    • E02B7/26—Vertical-lift gates
    • 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
    • E02B7/26—Vertical-lift gates
    • E02B7/36—Elevating mechanisms for vertical-lift gates
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/40—Motors; Magnets; Springs; Weights; Accessories therefore
    • E05Y2201/43—Motors
    • E05Y2201/448—Fluid motors; Details thereof
    • E05Y2201/456—Pistons
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2201/00—Constructional elements; Accessories therefore
    • E05Y2201/60—Suspension or transmission members; Accessories therefore
    • E05Y2201/622—Suspension or transmission members elements
    • E05Y2201/71—Toothed gearing
    • E05Y2201/716—Pinions
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2600/00—Mounting or coupling arrangements for elements provided for in this subclass
    • E05Y2600/10—Adjustable or movable
    • E05Y2600/30—Adjustable or movable characterised by the type of motion
    • E05Y2600/31—Linear motion
    • E05Y2600/314—Vertical motion
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05Y—INDEXING SCHEME RELATING TO HINGES OR OTHER SUSPENSION DEVICES FOR DOORS, WINDOWS OR WINGS AND DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION, CHECKS FOR WINGS AND WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05Y2900/00—Application of doors, windows, wings or fittings thereof
    • E05Y2900/40—Application of doors, windows, wings or fittings thereof for gates

Abstract

The present invention relates to a hydraulically operated hydraulic cylinder opening / closing system capable of correcting horizontally and horizontally the left and right sides of a watercraft and eliminating the occurrence of leakage, Device. For this purpose, it is installed in the waterway between the wall and the wall of the embankment formed in the river, and operates to ascend and descend so as to open and close the flow of water; Two left and right hydraulic cylinders connected to the water gate through a piston rod and operated to move up and down; Guide grooves formed on both side walls of the water channel to guide movement of the water gate in a vertical direction; And a roller provided on both sides of the watercourse to rotate in a rolling manner along the guide of the guide groove, the watercress device comprising: a support bracket fixed to both side walls facing the one side of the watercourse and forming the watercourse; The support brackets being fixed to the support brackets on both sides by bolts or welding and vertically installed so as to have a height enough to cover from the lower end of the watercourse closed to the uppermost open position, A laid-mouth language facing the gate; A pinion provided on both sides of the watercourse and rotated in association with the respective raceways of the two sides; A rotary shaft fixedly mounted with the respective pinions; And a bearing housing fixedly installed on one surface of the water inlet so as to rotatably support the respective rotary shafts.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hydraulic cylinder opening /

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water gate installed to regulate the water level of a bank facility such as a river or a reservoir and more particularly to a water gate installed to control the amount of water The present invention relates to a hydraulic cylinder retractable hydrologic apparatus, and more particularly, to a hydrologic horizontal retention apparatus for a hydraulic cylinder retractable hydrologic apparatus.

Generally, a water gate is an irrigation water which is installed in a waterway such as a river or a reservoir so as to prevent the flow of water and to store the water or to control the flow rate of the water to keep the proper amount of the water to be used appropriately as agricultural land management or irrigation water. It is a movable structure installed in a waterway or a reservoir. It is installed at a branching point or a confluence point of a river to control the flow rate. It is installed on the coastal embankment to prevent backflow of tide water, Or a device installed in a waterproof pipe to control the discharge or flood.

1, when the water gate is opened, the pinion gear of the water jacket 2 is rotated manually or by electric power, and the pinion gear of the rack bar 2 connected to the center of the water gate 3 or to the upper part of both sides 4) to lift the water gate 3 so as to open the discharge path 5 of the water channel. When the water gate is closed, it is lowered by the self weight of the raised water gate 5, that is, The pinion gear is prevented from rotating in the reverse direction to keep the pinion gear in the open state, and the pinion gear is lowered by the self-weight of the gate 3 due to the reverse rotation of the pinion gear.

However, in order to achieve the full opening of the water gate, the water level is raised higher than the height of the water gate 3 at the upper portion of the structure 6 in order to open the water gate 3, (Usually 1.2 times the height), and the water gate 3 is lifted up and opened by the winding part 2 provided on the mounting table 7.

That is, in order to operate, repair, and manage the above-mentioned gate pad, the above-mentioned gate pad has troubles and risks of climbing up the installation stand 7 located at a considerable height by using a ladder or a stairway.

In addition, there has been a problem such as an increase in mounting and installation costs due to the additional construction of the mounting base 7 having a considerable height on the upper part of the structure 6, and an extension of the installation construction period.

The water gate 3 and the rack bar 4 are lifted up by using the rack bars 4 at an upper position of a considerable height or dropped by their own weight, There is a problem in that the operation of the opening and closing of the water gate 3 is not easy due to a bad operation due to a large flow of the water gate 3, In order to prevent the shaking, a mechanism for holding and guiding the rack bars 4 for pulling the rack bars 4 is required, and there is a problem that machining of the long rack bars 4 is required.

In addition, as described above, in the conventional hydrangea machine, an impact is applied to the water gate, as well as to the rake bar and the winding section due to the impact applied to the water gate during the closing operation of dropping the water gate by the weight of the water gate, And the like.

As described above, the use of the pinion and the pinion as the opening and closing means of the water gate is a structure in which the pinion itself of the rod length is very vulnerable to the up and down movement of the pinion in conjunction with the rotation of the pinion. It is considered that the driving force of the gear can not be applied to the total weight of the watercraft, so that it can be applied to the small-sized watercleaning mechanism having a very small total weight installed on a small agricultural watercourse scale, have.

For this reason, instead of the technique of using the pinion gear and the pinion gear as opening / closing means, recently, a hydrological opening / closing system using a hydraulic cylinder has been generalized.

This hydraulic cylinder method is very stable and can obtain a very large power, unlike the pinion gear and the pinion gear. Since there is no shock when opening and closing the water gate, it is useful as a means for opening and closing the water gate, And the two piston rods 11 supporting the load are long rod-like structures, when a swing occurs when the high-capacity water gate 10 ascends and descends by the operation of the hydraulic cylinder 12, As shown in the plan sectional view of Fig. 3, in the side walls 14 and 14 forming the waterway 13 of the water gate 10 in order to prevent the swinging movement of the water gate 10 in the back and forth direction, The grooves 15 are pierced and a stainless steel plate 16 is added to the guide grooves 15 and the rollers 18 are lifted up and down so as to be rotatably supported by the support members 17 on both sides of the water gate 10 And when the water gate 10 ascends and descends The upper and lower rollers 18 on both sides are guided up and down while being rotated along the guide of the wall of the guide groove so that the highly loaded sluice gate 10 can be raised and lowered smoothly along the rolling of the rollers 18 In this case, the rubber or plastic packing 19 is prevented from leaking in close contact with the wall surface of the guide groove 18.

However, because of the various advantages of the hydraulic cylinder type water gate 10 described above, a lot of water is installed in the so-called four-river project to store water. However, there are many unexpected side effects, The main cause of the defect is that when the hydraulic pressure is not balanced between the right and left hydraulic cylinders 12 and 12 supporting the water gate 10, The hydraulic gate 10 can not maintain an accurate horizontal position and is slanted to be caught in the guide groove 15 and can not be raised or lowered to cause an overload or failure of the hydraulic motor (not shown) (10) due to failure to open or close the water gate due to maintenance work for the water gate The lower side of the watercourse comes into contact with the river bottom 30, but there is a problem that the other side causes a leakage gap to cause water leakage.

Korean Patent No. 10-0397624

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a horizontal holding device for a hydraulic cylinder opening and closing type hydraulic cylinder which is always horizontally held horizontally,

It is another object of the present invention to provide a horizontal holding device for a hydraulic cylinder opening and closing type hydraulic system capable of improving the problems by additionally installing simple devices in the existing hydraulic cylinder opening and closing system.

In order to achieve the above-mentioned object, a hydromechanical element of a hydraulic cylinder opening and closing type system having a horizontal holding device of a watercraft of the present invention is installed in a waterway between a wall of a bank and a wall formed in a river, Hydrology; Two left and right hydraulic cylinders connected to the water gate through a piston rod and operated to move up and down; Guide grooves formed on both side walls of the water channel to guide movement of the water gate in a vertical direction; And a roller provided on both sides of the watercourse to rotate in a rolling manner along the guide of the guide groove, the watercress device comprising: a support bracket fixed to both side walls facing the one side of the watercourse and forming the watercourse; The support brackets being fixed to the support brackets on both sides by bolts or welding and vertically installed so as to have a height enough to cover from the lower end of the watercourse closed to the uppermost open position, A laid-mouth language facing the gate; A pinion provided on both sides of the watercourse and rotated in association with the respective raceways of the two sides; A rotary shaft fixedly mounted with the respective pinions; And a bearing housing fixedly installed on one surface of the water inlet so as to rotatably support the respective rotary shafts.

According to the embodiment of the present invention, the rotary shaft of the pinion is divided into left and right or a single body is used.

According to a preferred embodiment of the present invention, the pinion is provided on both the upper and lower sides including four sides of the watercourse.

According to a preferred embodiment of the present invention, the support bracket is bolted to the wall of the water channel in such a manner that the support bracket is supported so that two of the cross-sectional members or the cross- do.

In the present invention, a support bracket is mounted on a water channel wall of a hydraulic cylinder opening / closing type hydraulic system installed in an existing river channel, a pinion fixed to the support bracket is rotated, and a pinion rotating The pinion constituting the horizontal holding device of the water receiving door is guided by the raising and lowering gear while the horizontal movement of the water receiving door is guided by the operation of the hydraulic cylinder so that the horizontal position of the left and right is always maintained. The occurrence of the tilting of the watercraft due to the lateral movement of the watercraft is eliminated, thereby preventing the hydraulic motor from overloading or failing due to the fact that the watercraft is not pinched, and the maintenance work for maintaining the watercraft leveling is eliminated, In addition, there is no need to additionally provide a rack-and-pinion and a pinion, It is possible to solve the problem by installing it, and it is very economical, and there is an effect that leakage phenomenon due to tilting of the water inlet is prevented.

This effect is not a driving means for raising and lowering the water level and pinion, and the hydraulic cylinder is responsible for the upward and downward movement of the watercraft, which requires a strong force. A horizontal holding device composed of a pinion and a pinion is in charge of the present invention, and it is possible to achieve the object of the present invention in cooperation with a hydraulic cylinder and a horizontal holding device.

Fig. 1 shows a conventional pass-gate device using a rack-and-pinion and a pinion as opening and closing means for opening and closing the gate.
Fig. 2 shows a conventional hydraulic control device of the hydraulic cylinder opening and closing method.
3 is a sectional view taken along the line AA in Fig.
4 is a view showing the hydrological structure of the hydrologic apparatus of the hydraulic cylinder opening and closing type system having the horizontal holding device for the water gate according to the present invention.
Fig. 5 is a top cross-sectional view of the hydrologic apparatus according to the present invention.
6 is a longitudinal sectional view of a hydrologic apparatus according to the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings in order to fully understand the present invention. The embodiments of the present invention may be modified into various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. The present embodiments are provided to enable those skilled in the art to more fully understand the present invention. Therefore, the shapes and the like of the elements in the drawings can be exaggeratedly expressed to emphasize a clearer description. It should be noted that in the drawings, the same members are denoted by the same reference numerals. Further, detailed descriptions of well-known functions and configurations that may be unnecessarily obscured by the gist of the present invention are omitted.

Hereinafter, a hydrologic apparatus according to the present invention will be described in detail with reference to the accompanying drawings. The hydrologic apparatus of the hydraulic cylinder opening and closing type having the horizontal holding apparatus of the present invention will be described in detail. 2 and FIG. 3, and will be described using the same reference numerals.

FIG. 4 is a view showing a water gate in which a pinion for forming a horizontal holding device is installed in the water gate apparatus according to the present invention, and FIG. 5 is a view showing a state in which the hydraulic cylinder operated water gate apparatus The roller 18 is rotatably supported on the support member 17 at two positions horizontally at least at four positions on the upper, lower, left and right sides of the water gate 10, The roller 18 is in contact with the wall surface of the guide groove 15 forming the water channel and performs a rolling motion that rotates when the water gate 10 ascends and descends to facilitate smooth upward and downward movement of the water gate 10.

The side walls 14 forming the waterway 13 are concrete structures and are provided with guide grooves 15 for preventing abrasion and corrosion by a load acting on the roller 18 when the water gate 10, ) Portion is reinforced with a stainless steel plate 16 and is tightly adhered to the wall surface of the guide groove 15 by water pressure on one surface of the water gate 10, that is, the opposite surface of the water receiving surface, A rubber material or a packing material 19 made of a plastic material is mounted so as to prevent leakage of water through the gap between the floodgates and the clearance of the guide groove 15. [

As shown in Fig. 5, the packing 12 is packed on both sides of the water gate 10 as a surface on one side of the water gate 10, more preferably on the opposite side of the water receiving side, The horizontal holding device 21 of the present invention is provided with a vertical holding device 21 as shown in FIG. And the pinion 23 is mounted on the support bracket 24 by a welding or bolt fastening to the wall 14 of the channel so that its gear teeth The support bracket 24 is installed so as to face the surface of the water gate 10 to face each other so as to symmetrically support the support bracket 24, 14).

The pinion 23 meshing with the rake-shaped gear 22 is provided on the rotary shaft 25 and the rotary shaft 25 is supported on the surface of the water gate 10 by a bolt 26 The horizontal holding device 21 is installed at two places on the left and right sides so as to be at least horizontal on both sides of the water gate 10, Although the left and right sides of the rotary shaft 25 are shown as being separated from each other in the illustrated embodiment, it is preferable that the rotary shafts 25 on both sides are formed as one single body, And the bearing housing 27 is capable of supporting a rotary shaft such as a ball bearing or a roller bearing or an oil-less bushing bearing having a simple surface contact without rotation, Which would also but may.

5 is a cross-sectional view taken in a stepwise manner so as to show a roller 28 with one side thereof being cross-sectioned so as to show the roller 18 and the other side being different from the installation position thereof. (The direction of the water flow) of the water gate 10 by being disposed between the front and rear wall surfaces of the guide groove 15 of the water gate 10 so as to be rotatable in a direction perpendicular to the direction The roller 28 is spaced apart from the guide groove 15 by the water pressure applied to the water gate, The guide groove 15 is brought into contact with the inner wall surface side of the guide groove 15 in which the guide groove 15 is in tight contact with the guide groove 15, Allowing the forward and backward clearance of the water gate 10 within the clearance range Doors are configured to minimize the fluctuation of Hydrology (10).

When the hydraulic fluid is supplied to the hydraulic cylinder 12 by operating the hydraulic motor, the piston rod 11 is raised when the hydraulic fluid is to be opened to discharge the confined water to the downstream side .

At this time, the water gate 10 is connected to the piston rod 11 through the joint link 29, so that the upward movement of the piston rod 11 also receives a force of the water gate 10 rising together, So that the water gate 10 is moved upward along the guide of the rail head 22.

As a result, when the water gate 10 is opened and opened as much as desired, the water is discharged to the downstream side through the opened water channel at the lower side. At this time, the pinions 23, which are horizontally installed on the water gate 10, Even if the hydraulic pressures acting between the hydraulic cylinders 12 and 12 on both sides are not balanced with each other due to the engagement with the hydraulic cylinder 22, the hydraulic cylinder 22 functions as a support to prevent deflection of one side of the water gate 10 The horizontal level of the water gate 10 is accurately maintained at all times, and the hydraulic pressure supply on both sides is also found to be in balance.

The horizontal holding of the water gate 10 is also maintained when the water gate 10 is closed by being lowered. In the process of returning the hydraulic pressure of the hydraulic cylinders 12 and 12 of both the hydraulic cylinders 12 and 12, The reason why the sag deflection does not occur even if the hydraulic pressure drops a little more than that of the pinion is that the pinion of both sides is supported to maintain the horizontal state by the pinion which engages with the pinions of both sides, In the case of a single body rotating shaft, it is possible to distribute the load to both sides to further enhance the horizontal holding effect.

As described above, the present invention can be applied not only to a newly installed hydrological apparatus, but also to a horizontal hydraulically operated hydrologic apparatus installed by adding a horizontal holding apparatus 21 of the hydrological door 10 without touching the basic structure of the hydraulically operated hydrologic apparatus And the pinion 23 prevents the packing 19 from being excessively compressed. Thus, the life of the packing 19 can be reduced, Can also be obtained incidentally.

In the foregoing, preferred embodiments of the present invention have been described herein, which is the best mode known to the inventors for carrying out the invention. It will be readily apparent to those skilled in the art that modifications of these preferred embodiments are possible from the foregoing description. The inventors have appreciated that skilled artisans can employ this variation, for example, to fully envisage a deformation (such as deforming the bracket to a configuration with wings that can secure the bracket to the wall) integral with the bracket , The inventors intend to carry out the present invention in addition to those specifically described above. Accordingly, the invention includes all modifications that are equivalent to the subject matter recited in the claims appended hereto as permitted by applicable law. Furthermore, all possible combinations of the above-mentioned elements will be included in the present invention unless specifically mentioned or excluded in the present specification.

10: Hydrology 11: Piston rod
12: Hydraulic cylinder 13: Water channel
14: Wall of the channel 15: Guide groove
16: stainless steel plate 17: support member
18: roller 19: packing
20: rotating shaft 21: horizontal holding device
22: Rae size 23: Pinion
24: support bracket 25:
26: Bolt 27: Bearing housing
28: roller 29: joint link

Claims (4)

A water gate installed in a waterway between a wall and a wall of a bank formed in the river to move up and down to open and close the water flow; Two left and right hydraulic cylinders connected to the water gate through a piston rod and operated to move up and down; Guide grooves formed on both side walls of the water channel to guide movement of the water gate in a vertical direction; And a roller provided on both sides of the watercourse to rotate in a rolling manner along the guide of the guide groove, the watercress device comprising: a support bracket fixed to both side walls facing the one side of the watercourse and forming the watercourse; The support brackets being fixed to the support brackets on both sides by bolts or welding and vertically installed so as to have a height enough to cover from the lower end of the watercourse closed to the uppermost open position, A laid-mouth language facing the gate; A pinion provided on both sides of the watercourse and rotated in association with the respective raceways of the two sides; A rotary shaft fixedly mounted with the respective pinions; And a bearing housing fixed to one surface of the water receptacle so as to rotatably support the respective rotary shafts. The hydraulic cylinder opening / closing apparatus according to claim 1, Hydrological system. The hydraulic apparatus according to claim 1, wherein a rotational shaft of the pinion is divided into left and right parts, or left and right parts are formed as a single body. The hydrologic apparatus according to claim 1 or 2, wherein four pinions are provided at both upper and lower positions including both sides of the water inlet. The support bracket according to claim 1 or 2, characterized in that the support bracket is bolted to the wall of the water channel in such a state that two of the cross-sectional member or the cross- And a horizontal holding device for the watercraft.
KR1020140062209A 2014-05-23 2014-05-23 Open and close typed floodgate apparatus having maintaining balance apparatus of floodgate KR20150134854A (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101886830B1 (en) * 2018-01-16 2018-08-09 일성보산업(주) Pulling up floodgate of hydraulic type
KR102233406B1 (en) 2021-01-28 2021-03-30 일성보산업(주) Horizontal hydraulic movable gate
CN113322905A (en) * 2021-06-04 2021-08-31 魏红梅 Waterproof drainage device of hydraulic engineering construction
CN114703810A (en) * 2022-04-22 2022-07-05 山东省水利工程局有限公司 Gate frame fixing device for sluice construction
CN115492054A (en) * 2022-09-28 2022-12-20 卓宇 Closure system and method for water conservancy construction
KR102496028B1 (en) * 2022-10-31 2023-02-07 한국동서발전(주) Underwater sediment removal device at power plant intake port
CN116446350A (en) * 2023-04-19 2023-07-18 浙江江南春建设集团有限公司 Novel plane fixed wheel gate

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101886830B1 (en) * 2018-01-16 2018-08-09 일성보산업(주) Pulling up floodgate of hydraulic type
KR102233406B1 (en) 2021-01-28 2021-03-30 일성보산업(주) Horizontal hydraulic movable gate
CN113322905A (en) * 2021-06-04 2021-08-31 魏红梅 Waterproof drainage device of hydraulic engineering construction
CN113322905B (en) * 2021-06-04 2024-01-23 魏红梅 Waterproof drainage device for hydraulic engineering construction
CN114703810A (en) * 2022-04-22 2022-07-05 山东省水利工程局有限公司 Gate frame fixing device for sluice construction
CN115492054A (en) * 2022-09-28 2022-12-20 卓宇 Closure system and method for water conservancy construction
CN115492054B (en) * 2022-09-28 2024-03-29 安能重庆建设发展有限公司 Cut-off system and method for water conservancy construction
KR102496028B1 (en) * 2022-10-31 2023-02-07 한국동서발전(주) Underwater sediment removal device at power plant intake port
CN116446350A (en) * 2023-04-19 2023-07-18 浙江江南春建设集团有限公司 Novel plane fixed wheel gate

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