CN215629721U - Adjustable water conservancy and hydropower engineering retaining dam - Google Patents
Adjustable water conservancy and hydropower engineering retaining dam Download PDFInfo
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- CN215629721U CN215629721U CN202122111400.8U CN202122111400U CN215629721U CN 215629721 U CN215629721 U CN 215629721U CN 202122111400 U CN202122111400 U CN 202122111400U CN 215629721 U CN215629721 U CN 215629721U
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- seepage
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 claims description 6
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 241000826860 Trapezium Species 0.000 claims 1
- 239000004519 grease Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 238000005461 lubrication Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 230000002265 prevention Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 230000001050 lubricating effect Effects 0.000 description 4
- 238000011144 upstream manufacturing Methods 0.000 description 3
- 238000013475 authorization Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
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- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Hydraulic Turbines (AREA)
Abstract
The utility model belongs to the technical field of hydraulic and hydroelectric engineering, in particular to an adjustable water retaining dam for hydraulic and hydroelectric engineering, which comprises a dam, a water flowing channel is arranged in the middle of the dam, a first valve plate and a second valve plate are symmetrically arranged on one side of the dam, a first anti-seepage plate is fixed on one side of the first valve plate, a second anti-seepage plate is fixed on one side of the second valve plate, a plurality of splash shields are fixed on the inner walls of the first valve plate and the second valve plate, a first chute matched with the splash guard is arranged on the outer wall of one side of the dam, two limiting strips are fixed at the bottom ends of the inner walls of the first valve plate and the second valve plate, and the bottom end of the outer wall of one side of the dam is provided with a second chute matched with the limiting strip, and the inner walls of the two sides of the flowing water channel are both fixed with anti-seepage strips.
Description
Technical Field
The utility model belongs to the technical field of hydraulic and hydroelectric engineering, and particularly relates to an adjustable water retaining dam for hydraulic and hydroelectric engineering.
Background
Water is the essential element that the human beings rely on to survive, and electric power is the main energy of social development, and hydraulic and hydroelectric engineering is on the basis of the natural characteristics research of water to engineering or non-engineering measure regulation and control and utilize the engineering science of hydroenergy resource, and current a retaining dam for hydroelectric engineering, including dam body and first concrete layer, the dam body is trapezoidal, and the dam body has the upstream slope, has a plurality of evenly distributed's first pit on the upstream slope, and first concrete layer lays in on the upstream slope, first concrete layer fills first pit, current retaining dam exists the defect that is not convenient for adjust river discharge.
Among the prior art, chinese utility model with publication number CN213417744U discloses a water conservancy and hydropower engineering's manger plate dam with adjustable, when using, staff driving motor, the motor drives the double threaded rod that the fixed block supported rotatory, and the double threaded rod both ends drive two sliders and valve plate motion in opposite directions or deviate from the motion respectively, reach the effect that the adjustment river passes through the flowing water passageway flow, in addition, the staff can twist off the bolt and withdraw from the locating hole with the bolt and can dismantle the valve plate and clear up.
However, the adjustable dam for hydraulic and hydroelectric engineering in the prior art has the following disadvantages in the using process: firstly, the upper end of the valve plate is fixedly connected with the slide block movably arranged on the upper part of the dam through a bolt, the valve plate is stably and firmly connected with the dam through a single fixed connection mode, particularly, after the bottom of the valve plate is impacted by water, the valve plate fixedly connected with the dam through the bolt is easy to movably bend, so that the phenomenon of bolt fracture occurs, the connection effect is poor, secondly, the valve plate is extruded through an anti-seepage plate after being closed to prevent water seepage, but a large gap still exists between the inner wall of the valve plate and the outer wall of the dam, so that water is easy to seep out from two sides of the valve plate, the anti-seepage effect is poor, in addition, a double-head threaded rod and a guide rod for moving the slide block and limiting the slide block lack good lubrication in daily use, inconvenience is brought to smooth opening and closing of the valve plate, and the operation is inconvenient through the conventional manual lubricating grease smearing mode, and the flowing lubricating grease is easy to drip, the smearing and lubricating effect is poor.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, the utility model provides an adjustable water retaining dam for hydraulic and hydroelectric engineering, which has the characteristics of stable and firm connection and good water seepage prevention effect.
In order to achieve the purpose, the utility model provides the following technical scheme: an adjustable retaining dam for hydraulic and hydroelectric engineering comprises a dam, wherein a flow channel is arranged in the middle of the dam, a first valve plate and a second valve plate are symmetrically arranged on one side of the dam, a first anti-seepage plate is fixed on one side of the first valve plate, a second anti-seepage plate is fixed on one side of the second valve plate, a plurality of anti-splash plates are fixed on the inner walls of the first valve plate and the second valve plate, a first chute matched with the anti-splash plates is arranged on the outer wall of one side of the dam, two limiting strips are fixed on the bottom ends of the inner walls of the first valve plate and the second valve plate, a second chute matched with the limiting strips is arranged on the bottom end of the outer wall of one side of the dam, anti-seepage strips are fixed on the inner walls of the two sides of the flow channel, a motor is arranged at the upper end of the upper side of the dam, the output end of the motor is connected with a double-thread rod through transmission shaft, one side of double threaded rod is provided with the guide bar, the upper end both sides of dam all are provided with the slider, slider and double threaded rod swing joint and with guide bar sliding connection, the upper end of first valve plate and second valve plate all passes through bolt fixed connection with the slider, the second recess has been seted up to one side upper end of slider, the upper end of slider is provided with the closing cap subassembly.
According to the water retaining dam optimal selection technical scheme of the adjustable water conservancy and hydropower engineering, the cover assembly comprises the buckle cover, the notch, the buckle protrusion and the first groove, the buckle cover is arranged at the upper end of the sliding block and is attached to the sliding block, the notch is formed in one side of the buckle cover and is of a trapezoidal structure, the buckle protrusion is integrally formed at the bottom end of the buckle cover and is embedded with the second groove, and the first groove is formed at the bottom end of the buckle cover.
As the optimal technical scheme of the adjustable water retaining dam for the hydraulic and hydroelectric engineering, slopes are integrally formed on two sides of the bottom end of the inner wall of the second groove, and the slope of each slope is 5 degrees.
According to the adjustable water conservancy and hydropower project water retaining dam optimal selection technical scheme, the two sides of the upper end of the dam are both fixed with the bottom plates, the bottom end of the motor is fixedly connected with the bottom plates, the two sides of the upper end of the dam are respectively fixed with the first fixing block and the second fixing block, one end of the double-head threaded rod penetrates through the first fixing block, the other end of the double-head threaded rod is rotatably connected with the second fixing block through the rotating shaft, and the two ends of the guide rod are respectively fixedly connected with the first fixing block and the second fixing block.
As the optimal technical scheme of the adjustable water retaining dam for the hydraulic and hydroelectric engineering, the splash guard is in sliding connection with the first sliding groove, the first sliding groove is formed in the first sliding groove, the limiting strip is in sliding connection with the second sliding groove, the splash guard and the limiting strip are both in elastic contact with the seepage-proofing strip, and the seepage-proofing strip is a polyurethane component.
As the optimal technical scheme of the adjustable water retaining dam for the hydraulic and hydroelectric engineering, the first seepage-proofing plate and the second seepage-proofing plate are both of L-shaped structures.
Compared with the prior art, the utility model has the beneficial effects that:
1. in the using process of the utility model, the splash guard slides in the first chute, the limiting strip slides in the second chute, so that the connection between the first valve plate and the second valve plate and the dam is more stable and firm, the connection effect is better, the problems that the upper ends of the first valve plate and the second valve plate are fixedly connected with the upper part of the dam by the bolts, the first valve plate and the second valve plate are stably and firmly connected relative to the dam by a single fixed connection mode, and the first valve plate and the second valve plate which are only fixedly connected with the dam by the bolts are easy to movably bend after the bottoms of the first valve plate and the second valve plate are subjected to the impact force of water, so that the bolt is broken are solved, meanwhile, after the utility model is closed, the first seepage-proofing plate and the second seepage-proofing plate which are connected in an embedding way, and the seepage-proofing strips between the first valve plate and the second valve plate and the dam, make water difficult to ooze between first valve plate and the second valve plate and the both sides of first valve plate and second valve plate, the prevention of seepage effect preferred, effectual first valve plate and the second valve plate of having solved carry out the prevention of seepage water through first prevention of seepage board and second prevention of seepage board extrusion after closed, nevertheless still have great clearance between first valve plate and the second valve plate inner wall and the dam outer wall for water is easily outwards oozed from the both sides of first valve plate and second valve plate the problem.
2. The utility model can lubricate the double-head threaded rod and the guide rod which are movably connected with the sliding block during the using process, when in concrete operation, the buckle cover is buckled on the sliding block through the open slot in the close cover component, the buckle protrusion at the bottom end of the buckle cover is separated from the second groove at the upper end of the sliding block, then the buckle cover is taken down from the upper end of the sliding block, and then the proper amount of fluid grease is added into the second groove, during the moving process of the sliding block relative to the double-head threaded rod and the guide rod, the grease in the second groove in the sliding block can be evenly attached to the double-head threaded rod and the double-head threaded rod, the lubrication is simple and convenient, the lubrication effect is better, the problem that the double-head threaded rod and the guide rod which are used for moving the sliding block and limiting the sliding block lack better lubrication during daily use is effectively solved, inconvenience is brought to the smooth opening and closing of the first valve plate and the second valve plate, and the conventional way of manually smearing grease is adopted, inconvenient operation and easy dripping of the fluid lubricating grease.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model and not to limit the utility model. In the drawings:
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of a partial three-dimensional structure of the stopper of the present invention;
FIG. 4 is a side view, cross-sectional, schematic view of the slider and cover assembly of the present invention;
fig. 5 is a schematic perspective view of the first impermeable plate and the second impermeable plate in a connected state.
In the figure: 1. a dam; 2. a water flow channel; 3. a first valve plate; 4. a second valve plate; 5. a first impermeable sheet; 6. a second impermeable sheet; 7. a splash shield; 8. a limiting strip; 9. a base plate; 10. a motor; 11. a first fixed block; 12. a double-headed threaded rod; 13. a second fixed block; 14. a guide bar; 15. a slider; 16. covering; 17. a first chute; 18. a second chute; 19. a barrier strip; 20. a groove is opened; 21. buckling a bulge; 22. a first groove; 23. a second groove.
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.
Examples
Referring to fig. 1-5, the present invention provides the following technical solutions: an adjustable retaining dam for hydraulic and hydroelectric engineering comprises a dam 1, a flowing water channel 2 is arranged in the middle of the dam 1, a first valve plate 3 and a second valve plate 4 are symmetrically arranged on one side of the dam 1, a first seepage-proofing plate 5 is fixed on one side of the first valve plate 3, a second seepage-proofing plate 6 is fixed on one side of the second valve plate 4, the first seepage-proofing plate 5 and the second seepage-proofing plate 6 are both in L-shaped structures, wherein the first seepage-proofing plate 5 and the second seepage-proofing plate 6 in the L-shaped structures are embedded and have better seepage-proofing effect, a plurality of splash-proofing plates 7 are fixed on the inner walls of the first valve plate 3 and the second valve plate 4, a first chute 17 matched with the splash-proofing plates 7 is arranged on the outer wall of one side of the dam 1, two limiting strips 8 are fixed on the bottom ends of the inner walls of the first valve plate 3 and the second valve plate 4, and a second chute 18 matched with the limiting strips 8 is arranged on the bottom end of the outer wall of one side of the dam 1, the inner walls of two sides of the flowing water channel 2 are fixed with impermeable strips 19, the splash guard 7 is in sliding connection with the first sliding groove 17, the limit strip 8 is in sliding connection with the second sliding groove 18, the splash guard 7 and the limit strip 8 are in elastic contact with the impermeable strips 19, the impermeable strips 19 are polyurethane components, when the water channel is used in concrete, the splash guard 7 slides in the first sliding groove 17, the limit strip 8 slides in the second sliding groove 18, so that the connection between the first valve plate 3 and the second valve plate 4 and the dam 1 is more stable and firm, the connection effect is better, meanwhile, the water is not easy to seep between the first valve plate 3 and the second valve plate 4 and between the second valve plate 4 through the first impermeable plate 5 and the second impermeable strip 6 which are connected in an embedding manner and the impermeable strips 19 between the first valve plate 3 and the second valve plate 4 and the dam 1, the impermeable effect is better, the details of the embodiment, which are not described in detail, are well known technologies, please refer to the adjustable water retaining dam of the hydraulic and hydroelectric engineering disclosed in the chinese utility model with the authorization publication number of CN213417744U, and the details are not repeated herein.
Specifically, a second groove 23 is formed in the upper end of one side of the slider 15, a slope is formed on two sides of the bottom end of the inner wall of the second groove 23, and the slope gradient is 5 degrees, wherein the second groove 23 is used for placing grease, and the slope structure at the bottom of the second groove 23 is convenient for flowing grease, a sealing cover assembly is arranged at the upper end of the slider 15, wherein the sealing cover assembly is used for sealing a sealing cover of grease in the second groove 23 in the slider 15, so as to prevent dust from adhering to the grease and reduce evaporation of the grease, the sealing cover assembly comprises a fastening cover 16, a notch 20, a fastening protrusion 21 and a first groove 22, the fastening cover 16 is arranged at the upper end of the slider 15 and is mutually attached to the slider 15, the notch 20 is formed in one side of the fastening cover 16, the notch 20 is of a trapezoidal structure, the fastening protrusion 21 is integrally formed at the bottom end of the fastening cover 16, the fastening protrusion 21 is mutually embedded with the second groove 23, the first groove 22 is formed at the bottom end of the fastening cover 16, the inner space of the second groove 23 can be increased by arranging the first groove 22, so that more grease can be conveniently put in, when the lubrication device is used specifically, the buckle cover 16 can be buckled on the slide block 15 through the corresponding notch 20 in the seal cover assembly, the buckle protrusion 21 at the bottom end of the buckle cover 16 is separated from the second groove 23 at the upper end of the slide block 15, then the buckle cover 16 is taken down from the upper end of the slide block 15, then the flowing grease is properly added into the second groove 23, and in the process that the slide block 15 moves relative to the double-end threaded rod 12 and the guide rod 14, the grease in the second groove 23 in the slide block 15 can be uniformly attached to the double-end threaded rod 12 and the double-end threaded rod 12, so that the lubrication is simple and convenient, and the lubrication effect is better.
Specifically, a motor 10 is arranged at the upper end of the upper side of the dam 1, the output end of the motor 10 is connected with a double-threaded rod 12 through a transmission shaft in a transmission manner, a guide rod 14 is arranged at one side of the double-threaded rod 12, sliding blocks 15 are arranged at two sides of the upper end of the dam 1, the sliding blocks 15 are movably connected with the double-threaded rod 12 and are in sliding connection with the guide rod 14, the upper ends of a first valve plate 3 and a second valve plate 4 are fixedly connected with the sliding blocks 15 through bolts, a bottom plate 9 is fixed at two sides of the upper end of the dam 1, the bottom end of the motor 10 is fixedly connected with the bottom plate 9, a first fixed block 11 and a second fixed block 13 are respectively fixed at two sides of the upper end of the dam 1, one end of the double-threaded rod 12 penetrates through the first fixed block 11, the other end of the double-threaded rod 12 is rotatably connected with the second fixed block 13 through a rotating shaft, two ends of the guide rod 14 are respectively fixedly connected with the first fixed block 11 and the second fixed block 13, the bottom plate 9, the motor 10, the first fixing block 11, the second fixing block 13, the double-threaded rod 12, the guide rod 14 and the slider 15 are used, please refer to the adjustable water retaining dam of the hydraulic and hydroelectric engineering disclosed in chinese utility model with the authorization publication number CN213417744U, which is a known technology and is not described herein again.
The utility model has the following use flow and working principle: when the utility model is opened, firstly, the starting motor 10 is externally connected with a power supply, the double-threaded rod 12 is driven to rotate in the forward direction by the starting motor 10, the slide block 15 is driven to move away by the double-threaded rod 12, meanwhile, the first valve plate 3 and the second valve plate 4 are driven to move away by the slide block 15, the slide block 15 and the first valve plate 3 and the second valve plate 4 are guided and limited by the slide block 15, in the moving process of the first valve plate 3 and the second valve plate 4, the first anti-seepage plate 5 and the second anti-seepage plate 6 are separated from each other, the anti-splash plate 7 slides in the first sliding groove 17, and the limiting strip 8 slides in the second sliding groove 18, so that the water flow channel 2 at the middle position of the dam 1 is opened to flow water, when the utility model is closed, the double-threaded rod 12 is driven to rotate by the reverse transmission of the motor 10, so that the slide block 15 drives the first valve plate 3 and the second valve plate 4 to move towards each other, the first valve plate 3 and the second valve plate 4 are connected through the first anti-seepage plate 5 and the second anti-seepage plate 6 in an embedded mode, in the process, the anti-splash plate 7 slides in the first sliding groove 17, and the limiting strip 8 slides in the second sliding groove 18.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the utility model as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The utility model provides a water conservancy and hydropower engineering's retaining dam with adjustable, includes dam (1), its characterized in that: a flowing water channel (2) is arranged in the middle of the dam (1), a first valve plate (3) and a second valve plate (4) are symmetrically arranged on one side of the dam (1), a first anti-seepage plate (5) is fixed on one side of the first valve plate (3), a second anti-seepage plate (6) is fixed on one side of the second valve plate (4), a plurality of anti-splash plates (7) are fixed on the inner walls of the first valve plate (3) and the second valve plate (4), a first sliding groove (17) matched with the anti-splash plates (7) is formed in the outer wall of one side of the dam (1), two limiting strips (8) are fixed at the bottom ends of the inner walls of the first valve plate (3) and the second valve plate (4), a second sliding groove (18) matched with the limiting strips (8) is formed in the bottom end of the outer wall of one side of the dam (1), anti-seepage strips (19) are fixed on the inner walls of two sides of the flowing water channel (2), last one side upper end of dam (1) is provided with motor (10), the output of motor (10) is connected with double threaded rod (12) through the transmission shaft transmission, one side of double threaded rod (12) is provided with guide bar (14), the upper end both sides of dam (1) all are provided with slider (15), slider (15) with double threaded rod (12) swing joint and with guide bar (14) sliding connection, the upper end of first valve plate (3) and second valve plate (4) all passes through bolt fixed connection with slider (15), second recess (23) have been seted up to one side upper end of slider (15), the upper end of slider (15) is provided with the closing cap subassembly.
2. The adjustable dam of hydraulic and hydroelectric engineering of claim 1, wherein: the closing cap subassembly includes buckle closure (16), opening groove (20), detains protruding (21) and first recess (22), buckle closure (16) set up in the upper end of slider (15) and laminate each other with slider (15), opening groove (20) and opening groove (20) have been seted up to one side of buckle closure (16) are the trapezium structure, the bottom integrated into one piece of buckle closure (16) has detain protruding (21) and the mutual gomphosis of second recess (23), first recess (22) have been seted up to the bottom of buckle closure (16).
3. The adjustable dam of hydraulic and hydroelectric engineering of claim 2, wherein: the two sides of the bottom end of the inner wall of the second groove (23) are integrally formed to form a slope, and the slope gradient is 5 degrees.
4. The adjustable dam of hydraulic and hydroelectric engineering of claim 1, wherein: the bottom and bottom plate (9) fixed connection of bottom plate (9) and motor (10) all are fixed with in the upper end both sides of dam (1), dam (1) upper end both sides are fixed with first fixed block (11) and second fixed block (13) respectively, the one end of double threaded rod (12) runs through the other end of first fixed block (11) and double threaded rod (12) and is connected through the pivot rotation with second fixed block (13), the both ends of guide bar (14) respectively with first fixed block (11) and second fixed block (13) fixed connection.
5. The adjustable dam of hydraulic and hydroelectric engineering of claim 4, wherein: the splash guard (7) is in sliding connection with the first sliding groove (17), the first sliding groove (17) is in sliding connection with the limiting strip (8) and the second sliding groove (18), the splash guard (7) and the limiting strip (8) are in elastic contact with the anti-seepage strip (19), and the anti-seepage strip (19) is a polyurethane component.
6. The adjustable dam of hydraulic and hydroelectric engineering of claim 1, wherein: the first anti-seepage plate (5) and the second anti-seepage plate (6) are both L-shaped structures.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN202122111400.8U CN215629721U (en) | 2021-09-02 | 2021-09-02 | Adjustable water conservancy and hydropower engineering retaining dam |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202122111400.8U CN215629721U (en) | 2021-09-02 | 2021-09-02 | Adjustable water conservancy and hydropower engineering retaining dam |
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Publication Number | Publication Date |
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CN215629721U true CN215629721U (en) | 2022-01-25 |
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CN202122111400.8U Expired - Fee Related CN215629721U (en) | 2021-09-02 | 2021-09-02 | Adjustable water conservancy and hydropower engineering retaining dam |
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CN (1) | CN215629721U (en) |
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2021
- 2021-09-02 CN CN202122111400.8U patent/CN215629721U/en not_active Expired - Fee Related
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Granted publication date: 20220125 |