CN114703814B - Deep hole leakage control structure of sandy river - Google Patents
Deep hole leakage control structure of sandy river Download PDFInfo
- Publication number
- CN114703814B CN114703814B CN202210543493.8A CN202210543493A CN114703814B CN 114703814 B CN114703814 B CN 114703814B CN 202210543493 A CN202210543493 A CN 202210543493A CN 114703814 B CN114703814 B CN 114703814B
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- gate
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- sudden expansion
- water flow
- bottom edge
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 70
- 239000000463 material Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims description 16
- 238000005260 corrosion Methods 0.000 claims description 9
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract description 5
- 230000003628 erosive effect Effects 0.000 description 18
- 230000002035 prolonged effect Effects 0.000 description 10
- 239000013049 sediment Substances 0.000 description 9
- 230000000630 rising effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 4
- 230000003116 impacting effect Effects 0.000 description 4
- 238000005266 casting Methods 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000009991 scouring Methods 0.000 description 3
- 239000013589 supplement Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 230000037237 body shape Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- 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
- E02B7/42—Gates of segmental or sector-like shape with horizontal axis
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B1/00—Equipment or apparatus for, or methods of, general hydraulic engineering, e.g. protection of constructions against ice-strains
- E02B1/003—Mechanically induced gas or liquid streams in seas, lakes or water-courses for forming weirs or breakwaters; making or keeping water surfaces free from ice, aerating or circulating water, e.g. screens of air-bubbles against sludge formation or salt water entry, pump-assisted water circulation
-
- 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
- E02B7/52—Equipment preventing vibration of 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
- E02B7/54—Sealings for gates
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
Abstract
The invention discloses a deep hole leakage control structure of a sandy river, which comprises a deep hole sluice chamber runner and an eccentric hinged arc gate arranged at a sluice gate of the deep hole sluice chamber runner, and is characterized in that: the panel of the eccentric hinge radial gate is made of 06Cr13Ni4Mo material within the range of 1.5-2.0 m upwards from the bottom edge of the panel; the bottom edge of the gate body of the eccentric hinge radial gate is of a curve structure. The door body of the eccentric hinged arc gate is made of different materials, wherein the lower part of the panel is made of high-strength 06Cr13Ni4Mo, so that the structural strength of the lower edge of the door body is enhanced, and the abrasion resistance of the gate is further improved; according to the invention, by reasonably designing the gate bottom edge curve, the curve equation of the gate bottom edge adopts an elliptic curve, the bottom of the wear-resistant panel is an elliptic major axis along the water flow direction, and the wear-resistant panel is an elliptic minor axis perpendicular to the water flow direction, so that water flow passes through the bottom edge smoothly, and cavitation generated by high-speed water flow at the bottom edge is avoided.
Description
Technical Field
The invention relates to the field of river drainage control, in particular to a deep hole drainage control structure of a sandy river.
Background
In recent years, a method of reducing water level and discharging sand is often adopted in a sand-rich river (such as a yellow river) to prolong the operation life of a sand-blocking reservoir of a reservoir, so that coarse-grain high-hardness sediment in the reservoir area is discharged into the downstream through a gate hole of a runner. However, the low water level sand removal mode of operation produces more serious frequent abrasive damage to the bottom edge of the radial gate and the bottom of the runner. Specifically:
when the gate is opened and controlled to discharge, the lower discharge flow is controlled by controlling the height of the bottom edge of the gate, in the process, high-speed water flow with larger sand content directly contacts with the bottom edge of the gate, the high-speed water flow suddenly diffuses after passing through the bottom edge of the gate to enable the water flow pressure energy to be instantaneously converted into kinetic energy, the flow speed is suddenly increased, and cavitation erosion is generated on the bottom edge of the gate;
at present, the gate hole size of the gate chamber runner is mostly square or rectangular, and both sides of the gate chamber section in the width direction adopt shrinkage. For deep hole flood discharge and sand discharge buildings, the arrangement position is low, high water head is required to generate high flow velocity, and cavitation erosion and abrasion damage are generated at the high-speed water flow at the abrupt position of the body shapes at the two sides of the bottom of the flow channel in the process of advancing the high-speed water flow from the circular section to the square or rectangular section, particularly in the outflow state of the partial opening gate.
Therefore, in the prior art, the wear-resistant plate is additionally arranged on the bottom edge of the gate by using bolts, the periphery of the screw hole is covered and ground by using epoxy mortar, however, the bonding strength of the bonding surface of the epoxy mortar is limited, so that the corrosion pits are damaged near the bolt holes, at the joint parts of the parting joints and on the upper panel, and the problem of abrasion of the bottom edge of the gate and the gate chamber can not be fundamentally solved.
Disclosure of Invention
In view of the above, the invention provides a deep hole leakage control structure of a sandy river, which effectively avoids abrasion of the bottom edge of a sluice chamber and the interior of a sluice chamber runner, and prolongs the service lives of the sluice gate and the deep hole sluice chamber runner.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the deep hole leakage control gate of the multi-sand river comprises a deep hole gate chamber runner and an eccentric hinged arc gate arranged at a gate opening of the deep hole gate chamber runner, wherein a panel of the eccentric hinged arc gate is made of 06Cr13Ni4Mo material within a range of 2.0-3.0 m upwards from the bottom edge of the panel; the bottom edge of the door body of the eccentric hinge radial gate is of a curve structure, and the curve equation is as follows:
。
the beneficial effects are that: the door body of the eccentric hinged arc gate is made of different materials, wherein the lower part of the panel is made of high-strength 06Cr13Ni4Mo, so that the structural strength of the lower edge of the door body is enhanced, and the abrasion resistance of the gate is further improved; according to the invention, by reasonably designing the gate bottom edge curve, the curve equation of the gate bottom edge adopts an elliptic curve, the bottom of the wear-resistant panel is an elliptic major axis along the water flow direction, and the wear-resistant panel is an elliptic minor axis perpendicular to the water flow direction, so that water flow passes through the bottom edge smoothly, and cavitation generated by high-speed water flow at the bottom edge is avoided.
Further, the deep hole lock chamber flow passage is sequentially provided with a advection section, a sudden drop section and a sudden expansion section from upstream to downstream;
the advection section is positioned at the upstream of the eccentric hinged arc gate, two first side walls of the advection section are vertically arranged, the two first side walls are connected with the bottom wall of the advection section through the arc section, and the middle part of the bottom wall is provided with a rear cover plate arranged along the water flow direction;
the sudden drop section is arranged at the downstream of the eccentric hinge radial gate and is provided with a vent hole;
the sudden expansion section is positioned at the downstream of the eccentric hinge radial gate and is provided with a first sudden expansion section and a second sudden expansion section, both side walls of the first sudden expansion section and both side walls of the second sudden expansion section are outwards sudden expansion, the first sudden expansion section is provided with a first air doping hole perpendicular to the water flow direction, and the second sudden expansion section is provided with a second air doping hole perpendicular to the water flow direction.
The method has the following effects: according to the invention, the first side wall of the advection section is vertically arranged, so that high-speed water flow smoothly passes through the advection section, the scouring of the high-speed water flow to the side wall of the advection section is effectively reduced, and the service life of the side wall is prolonged;
the ventilation holes and the air doping holes can effectively ensure the air doping amount in the water tongue, avoid the direct impact of the high-speed sand-containing countercurrent on the side wall at the rear side of the gate, reduce erosion and prolong the service life of the side wall at the rear of the gate.
Furthermore, the thickness of the panel of the eccentric hinge radial gate is more than or equal to 30mm, and the panel is made of wear-resistant materials, so that the erosion resistance of the lower part of the gate is effectively improved, and the service life of the gate is prolonged;
the lower two-meter range of the first side wall and the bottom wall of the advection section are of an integrated structure made of ZG06Cr13Ni4Mo, and the radius of the arc section is 0.3 m-0.5 m; the lower part of the first side wall and the bottom wall of the advection section adopt wear-resistant castings, so that the erosion resistance of the advection section is further improved;
the bottom edge, the lower part of the first side wall and the bottom wall of the advection section of the eccentric hinged arc gate are all clad with tungsten carbide anti-corrosion protection layers, the finish degree of the tungsten carbide anti-corrosion protection layers is 6.3, and the erosion resistance is improved.
Furthermore, the lower parts of the two first side walls and the bottom wall of the advection section are of an integrated structure, and the cast ZG06Cr13Ni4Mo material is adopted, so that the structural strength of the advection section is effectively ensured, and the flushing resistance of the advection section is improved.
Further, the length of each side wall of the first sudden expansion section suddenly expands outwards is 0.5 m-0.8 m, and the length of each side wall of the first sudden expansion section along the water flow direction is 0.75 m-1.0 m; the second sudden expansion section is sudden expansion outwards from the first sudden expansion section, and the sudden expansion length of the sudden expansion outwards is 0.8 m-1.2 m.
The beneficial effects are that: the first abrupt expansion section and the second abrupt expansion section are in a step structure and are abrupt expansion outwards, so that the high-speed sand-containing countercurrent impact on the side wall at the rear side of the gate is further avoided, the erosion resistance is improved, and the repair period is prolonged.
Further, the bottoms of the first and second sudden expansion sections extend downwards from the sudden drop section in an inclined manner along the water flow direction, so that the free falling of the high-speed sediment water flow is ensured.
The invention optimizes the bottom edge curve of the eccentric hinged arc gate, the bottom edge of the gate adopts an elliptic curve, the bottom of the wear-resistant panel is an elliptic major axis along the water flow direction, and the wear-resistant panel is an elliptic minor axis perpendicular to the water flow direction, so that water flow passes through the bottom edge smoothly, and cavitation generated by high-speed water flow at the bottom edge is avoided; the gate adopts wear-resisting material and is coated with the tungsten carbide anti-corrosion protection layer, so that the erosion resistance of the lower edge of the gate is improved, and the service life of the gate is prolonged.
The invention optimizes the flow channel structure of the deep hole sluice chamber flow channel, improves the erosion resistance of the flow channel, ensures that high-speed water flow smoothly passes through the advection section by vertically arranging the side wall of the advection section of the deep hole sluice chamber flow channel, effectively reduces the erosion of the high-speed water flow to the side wall of the advection section, and reduces the erosion of the high-speed sediment water flow to the side wall at the sluice gate;
according to the invention, the rising and falling section is arranged at the bottom edge of the gate, the rear side of the rising and falling section adopts the secondary rising and falling expansion, the air can be supplemented to the water house through the air vent and the air-entraining hole, the air-entraining amount is improved, the impact of high-speed sand-containing countercurrent to the rear side wall of the gate is reduced, and the service life of the rear side wall of the gate is prolonged.
Drawings
Fig. 1 is a schematic view of the structure of the eccentric hinged radial gate of the present invention.
Fig. 2 is a schematic structural view of the present invention.
FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2 (i.e., a cross-sectional view of the advection of the present invention).
Fig. 4 is a cross-sectional view taken along line B-B of fig. 2 (i.e., a schematic view of a companding section of the present invention).
Detailed Description
The following describes embodiments of the present invention in detail with reference to the accompanying drawings, and the embodiments and specific operation procedures are given by the embodiments of the present invention under the premise of the technical solution of the present invention, but the scope of protection of the present invention is not limited to the following embodiments.
As shown in fig. 1, the deep hole control structure of the sandy river comprises a deep hole sluice chamber runner and an eccentric hinged arc gate 1 arranged at a sluice gate of the deep hole sluice chamber runner, wherein the bottom edge of a gate body of the eccentric hinged arc gate 1 is of a curve structure, and the curve equation is as follows:
；
the thickness of the panel of the eccentric hinge arc gate 1 is 40mm, and the panel is made of 06Cr13Ni4Mo material 2.5m higher from the bottom edge (namely upward along the direction C in FIG. 1), so that the structural strength of the gate and the erosion resistance of the lower edge of the gate are improved; the panel of the eccentric hinge radial gate 1 is coated with a tungsten carbide anti-corrosion protective layer, the finish degree of the protective layer is 6.3, the surface flatness and corrosion resistance of the lower edge of the gate body are improved, sand particles are prevented from being detained on the surface of the gate, and the gate is protected.
As shown in fig. 2-4, the deep hole lock chamber runner is sequentially provided with a advection section 2, a sudden drop section 3 and a sudden expansion section from upstream to downstream; the horizontal flow section 2 is positioned at the gate of the eccentric hinged radial gate 1, two first side walls 2.1 of the horizontal flow section 2 are vertically arranged, the two first side walls 2.1 and the bottom wall of the horizontal flow section 2 are connected together through the circular arc section 2.2, a grouting hole along the water flow direction is formed in the middle of the bottom wall, and a rear cover plate 2.3 is arranged at the grouting hole after casting; the first side wall 2.1 of the advection section 2 is vertically arranged, so that high-speed sediment water flow smoothly passes through the advection section 2, the scouring of the water flow to the side wall of the advection section 2 is effectively reduced, and the service life of the side wall is prolonged;
the rising and falling section 3 is arranged at the bottom edge of the gate, the bottom edge of the rising and falling section 3 inclines downwards from the bottom wall of the advection section 2, the rising and falling section 3 is provided with a vent hole 3.1 perpendicular to the water flow direction, the gas can be supplemented to the water house of the high-speed sediment water flow, the aeration quantity is improved, and the erosion of the high-speed sediment water flow is reduced;
the sudden expansion section is arranged at the rear side of the bottom edge of the eccentric hinged radial gate 1 and is provided with a first sudden expansion section 4 and a second sudden expansion section 5, and the bottoms of the first sudden expansion section 4 and the second sudden expansion section 5 extend downwards from the sudden drop section 3 in an inclined manner along the water flow direction so as to ensure the free falling of high-speed sediment water flow;
the two side walls of the first sudden expansion section 4 and the second sudden expansion section 5 are respectively and suddenly expanded outwards, the two side walls of the first sudden expansion section 4 and the second sudden expansion section 5 are of step structures, the first sudden expansion section 4 and the second sudden expansion section 5 are respectively and suddenly expanded outwards in the step structures, the high-speed sand-containing water flow is further prevented from impacting the side wall at the rear side of the gate, and the erosion resistance is improved;
the first sudden expansion section 4 is provided with a first air doping hole 4.1 perpendicular to the water flow direction, the second sudden expansion section 5 is provided with a second air doping hole 4.2 perpendicular to the water flow direction, the first air doping hole 4.1 and the second air doping hole 4.2 can supplement air for high-speed silt water flow, water flow is fully aerated, air entrainment is further ensured, high-speed sand-containing water flow is prevented from directly impacting the side wall at the rear side of the gate, and the service life of the side wall behind the gate is prolonged.
As shown in fig. 1, the bottoms of the first and second sudden expansion sections 4 and 5 extend obliquely downstream along the water flow direction, so that the water flow generates a drop to ensure sufficient aeration, the side walls of the first and second sudden expansion sections 4 and 5 are outwardly expanded in a step shape, wherein the outwardly sudden expansion width of the first sudden expansion section 4 is 0.5m (i.e. the width perpendicular to the water flow direction is 0.5 m), and the length of the first sudden expansion section 4 along the water flow direction is 0.75m; the second sudden expansion section 5 is suddenly expanded by 1.0m outwards from the tail end of the first sudden expansion section 4, namely, the second sudden expansion section 5 continues to suddenly expand by 1.0m on the basis of sudden expansion of the first sudden expansion section 4, and the first sudden expansion section 4 and the second sudden expansion section 5 are suddenly expanded outwards in a step structure, so that the high-speed sand-containing water flow is further prevented from impacting the downstream side wall of the gate, erosion is avoided, and the service life of the downstream side wall of the gate is prolonged.
As shown in fig. 1, in actual processing, the height of two meters at the lower part of the first side wall 2.1 and the bottom wall of the advection section 2 are of an integrated structure made of casting material ZG06Cr13Ni4Mo, the radius of the circular arc section 2.2 is 0.5m (of course, other values within the range of 0.3-0.5 m can be adopted), and the upper part of the first side wall 2.1 and the top wall of the advection section 2 are made of the conventional materials; the lower part and the bottom wall of the first side wall 2.1 are coated with a tungsten carbide anti-corrosion protective layer F, so that the erosion resistance of the advection section 2 is improved.
As shown in fig. 1, an auxiliary water stop 6 extending along the water flow direction is arranged on the side wall of the first sudden expansion section 4, the auxiliary water stop 6 is a P-type rubber water stop, and the auxiliary water stop 6 is matched with the bottom edge of the panel of the eccentric hinged arc gate 1, so that the sealing effect of the gate is effectively ensured; the auxiliary water stop 6 is close to the main water stop 7, so that the total water pressure in a retreating state can be reduced, the vibration condition of the gate caused by jet flow is avoided, and the stability of the gate is ensured.
The unique gate curve and the panel of the invention improve the erosion resistance of the bottom edge of the gate and prolong the service life of the gate; the section of the advection section 2 is of a rectangular structure, so that high-speed sediment water flow smoothly passes through the section, the scouring of the water flow to the side wall of the advection section 2 is reduced, and the service life of the side wall is prolonged; the air vent 3.1 is arranged at the sudden drop section 3, and the air vent 3.1 can supplement air to the bottom of the water house when water flows through the gate; the side wall of the first sudden expansion section 4 is provided with a first air doping hole 4.1, so that air supplement at the bottom of the water house is further ensured, and water flow is ensured to be fully aerated; the second sudden expansion section 5 is outwards suddenly expanded and is provided with a second air doping hole 4.2, so that air doping amount is ensured, high-speed sand-containing water flow is prevented from directly impacting the side wall at the rear side of the gate, cavitation erosion is reduced, the service life of the side wall at the rear of the gate is prolonged, and the sand-containing water flow is particularly suitable for a sand-draining and draining hub of a sediment-rich river (such as a yellow river).
In the description of the present invention, the terms "mounted," "connected," "coupled," and "connected," as may be used broadly, and may be connected, for example, fixedly, detachably, or integrally, unless otherwise specifically defined and limited; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art in specific cases.
It should be emphasized that the above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiment, but may be modified without inventive effort or equivalent substitution of some of the technical features described in the above embodiments by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (1)
1. The utility model provides a structure is let out in deep hole accuse of many sand river, includes deep hole lock chamber runner and sets up the eccentric hinge radial gate of deep hole lock chamber runner gate mouth department, its characterized in that: the panel of the eccentric hinge radial gate is made of 06Cr13Ni4Mo material within the range of 2.0-3.0 m upwards from the bottom edge of the panel; the bottom edge of the door body of the eccentric hinge radial gate is of a curve structure, and the curve equation is as follows:
;
the deep hole lock chamber flow channel is sequentially provided with a advection section, a sudden drop section and a sudden expansion section from upstream to downstream;
the advection section is positioned at the upstream of the eccentric hinged arc gate, two first side walls of the advection section are vertically arranged, the two first side walls are connected with the bottom wall of the advection section through the arc section, and the middle part of the bottom wall is provided with a rear cover plate arranged along the water flow direction;
the sudden drop section is arranged at the downstream of the eccentric hinge radial gate and is provided with a vent hole;
the sudden expansion section is positioned at the downstream of the eccentric hinged radial gate and is provided with a first sudden expansion section and a second sudden expansion section, both side walls of the first sudden expansion section and both side walls of the second sudden expansion section are outwards sudden expansion, the first sudden expansion section is provided with a first air doping hole perpendicular to the water flow direction, and the second sudden expansion section is provided with a second air doping hole perpendicular to the water flow direction;
the thickness of the panel of the eccentric hinge radial gate is more than or equal to 30mm; the lower two-meter range of the first side wall and the bottom wall of the advection section are of an integrated structure made of ZG06Cr13Ni4Mo, and the radius of the arc section is 0.3 m-0.5 m; the bottom edge of the eccentric hinged arc gate, the lower part of the first side wall and the bottom wall of the advection section are all clad with tungsten carbide anti-corrosion protection layers, and the finish degree of the tungsten carbide anti-corrosion protection layers is 6.3;
the length of each side wall of the first sudden expansion section, which is suddenly expanded outwards, is 0.5 m-0.8 m, and the length of each side wall of the first sudden expansion section along the water flow direction is 0.75 m-1.0 m; the second sudden expansion section is sudden expanded outwards from the first sudden expansion section, and the sudden expansion length of the sudden expansion outwards is 0.8 m-1.2 m; the bottoms of the first and second flared sections extend obliquely downward from the stepped section in the direction of water flow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210543493.8A CN114703814B (en) | 2022-05-19 | 2022-05-19 | Deep hole leakage control structure of sandy river |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210543493.8A CN114703814B (en) | 2022-05-19 | 2022-05-19 | Deep hole leakage control structure of sandy river |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114703814A CN114703814A (en) | 2022-07-05 |
| CN114703814B true CN114703814B (en) | 2023-12-26 |
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| CN202210543493.8A Active CN114703814B (en) | 2022-05-19 | 2022-05-19 | Deep hole leakage control structure of sandy river |
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| CN114703814A (en) | 2022-07-05 |
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