CN115110505A - Method for preventing bottom pivot of miter gate from permanently moving - Google Patents
Method for preventing bottom pivot of miter gate from permanently moving Download PDFInfo
- Publication number
- CN115110505A CN115110505A CN202210878988.6A CN202210878988A CN115110505A CN 115110505 A CN115110505 A CN 115110505A CN 202210878988 A CN202210878988 A CN 202210878988A CN 115110505 A CN115110505 A CN 115110505A
- Authority
- CN
- China
- Prior art keywords
- bottom pivot
- pillow
- gate
- miter gate
- support
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 54
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000011144 upstream manufacturing Methods 0.000 claims description 4
- 239000013049 sediment Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C1/00—Locks or dry-docks; Shaft locks, i.e. locks of which one front side is formed by a solid wall with an opening in the lower part through which the ships pass
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02C—SHIP-LIFTING DEVICES OR MECHANISMS
- E02C1/00—Locks or dry-docks; Shaft locks, i.e. locks of which one front side is formed by a solid wall with an opening in the lower part through which the ships pass
- E02C1/06—Devices for filling or emptying locks
-
- 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
- Y02A10/30—Flood prevention; Flood or storm water management, e.g. using flood barriers
Landscapes
- Engineering & Computer Science (AREA)
- Ocean & Marine Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Barrages (AREA)
Abstract
A method for preventing the bottom pivot of the miter gate from shifting permanently, mount the sealing mechanism on the bottom pivot of the miter gate, when the miter gate is filled with silt between the pillow block and the branch, the pillow block can't contact closely, there is water leakage phenomenon; forming water flow between the pillow blocks to impact silt between the pillow blocks and wash away the silt from the pillow blocks; a gap is formed between the support cushion block and the pillow cushion block, the water pressure borne by the miter gate presses the miter gate to the gate head side pier to drive the bottom pivot to move towards the bottom pivot base, and the gap between the mushroom head of the bottom pivot and the bottom pivot base is reduced; until the silt between the branch and the pillow blocks is impacted cleanly, the branch and the pillow blocks are in close contact, so that the mushroom head of the bottom hinge is in close contact with the base of the bottom hinge, and the status of the miter gate is recovered to be normal. The method for preventing the bottom pivot of the miter gate from permanently moving can effectively prevent the water sealing function of the support and pillow blocks from being invalid and prevent the bottom pivot from bearing water pressure.
Description
Technical Field
The invention relates to a miter gate, in particular to a method for preventing a bottom pivot of the miter gate from being permanently displaced.
Background
When the ship lock operates the miter gate to close and stop water, the ship lock discharges river water downwards to the miter gate, then rebounds, deposits silt on a crossing part of the miter gate and a downstream gate wall, namely a downstream threshold at the bottom pivot, and when the miter gate is opened after the silt forms a certain height, the miter gate is inverted to the bottom pivot, and silt is filled between the miter gate support and the pillow block and is accumulated on the mushroom head of the bottom pivot and the base. When the herringbone door is closed after silt is filled between the support and the pillow block of the herringbone door, the herringbone door does not reach a certain position of a full closing position, no gap exists between the support and the pillow block, and when the herringbone door is closed, the support cushion block, the pillow cushion block and the silt are extruded to shift the bottom of the herringbone door outwards, so that a gap appears between the mushroom head of the bottom pivot and the vertical contact surface of the base, the accumulated silt enters the gap, the bottom pivot can not return permanently in operation, the support and the pillow block at the bottom of the herringbone door have a gap and can not be in close contact, and the consequent brought about that the support and the pillow block leak water, the water sealing function fails, the support and the pillow block fail to transfer force, and the bottom pivot bears the water pressure. The herringbone door has large defects and potential safety hazards, the ship lock needs to be shut down, the lock chamber is drained, and the herringbone door is overhauled, so that huge social and economic benefit losses are brought.
The problem of bottom pivot displacement caused by filling silt between the herringbone door support and the pillow blocks not only troubles the operation management of the prior ship lock, but also is more prominent along with the development of the ship lock to a high water head and large scale, and the safe operation reliability of the herringbone door bottom pivot becomes a key technical problem influencing the development of the high water head ship lock.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preventing the bottom pivot of the miter gate from permanently moving, preventing the bottom pivot from permanently moving, avoiding the water sealing function failure of the support and pillow cushion blocks, avoiding the force transmission function failure of the support and pillow cushion blocks and avoiding the water pressure borne by the bottom pivot.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a method of preventing permanent displacement of the miter gate bottom pivot, comprising the steps of:
step 1: sealing mechanisms are arranged on the upper horizontal planes of the support and pillow block sides of the bottom pivot base and the upper plane of the bottom pivot mushroom head chassis, and the sealing mechanisms are arranged in the annular direction of the upper horizontal planes of the support and pillow block sides of the bottom pivot base;
and 2, step: when the ship lock operates normally, the miter gate is fully closed;
and step 3: the water filling valve is opened to fill water into the gate chamber;
and 4, step 4: the herringbone gate is closed under the action of the difference between the water levels of the upstream and the downstream;
and 5: when silt is filled between the support cushion blocks and the pillow cushion blocks of the miter gate, the support cushion blocks and the pillow cushion blocks cannot be in close contact, and the water leakage phenomenon exists;
step 6: forming water flow between the pillow blocks to impact silt between the pillow blocks and wash away the silt from the pillow blocks;
and 7: a gap is formed between the support and the pillow block, the water pressure borne by the miter gate presses the miter gate to the gate head side pier to drive the bottom pivot to move towards the bottom pivot base, and the gap between the mushroom head of the bottom pivot and the bottom pivot base is reduced;
and 8: and (5) repeating the step (2) to the step (7) until the sediment between the support cushion blocks and the pillow cushion blocks are completely impacted, and the support cushion blocks and the pillow cushion blocks are in close contact, so that the mushroom head of the bottom pivot is in close contact with the base of the bottom pivot, and the state of the miter gate is recovered to be normal.
The sealing mechanism in the step 1 comprises a flexible sealing element, the flexible sealing element covers the vertical contact surface of the mushroom head and the bottom pivot base, the outer side of the flexible sealing element is installed on the horizontal surface on the side of the support and the pillow block through a pressing plate and a bolt, and the inner side of the flexible sealing element is placed on the upper plane of the mushroom head chassis.
The flexible sealing element is processed by rubber, and the whole shape of the flexible sealing element is a partial circular ring.
The inner diameter of the flexible sealing element and the pressing plate is 3-5 mm larger than the radius of the inner circle of the upper plane of the mushroom head chassis.
The invention discloses a method for preventing a bottom pivot of a miter gate from permanently moving, which has the following technical effects:
1) the structure principle is clear and simple, the installation is convenient, and the field reconstruction is easy to realize.
2) The water sealing device can effectively prevent the bottom pivot from permanently moving, can effectively avoid the water sealing function failure of the support and pillow cushion blocks, can effectively avoid the force transmission function failure of the support and pillow cushion blocks, and avoids the bottom pivot from bearing water pressure.
3) And under the condition of influence of silt, the operation safety of the herringbone door is guaranteed.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a cross-sectional view of a bottom pivot of a conventional miter gate.
FIG. 2 is a cross-sectional view of the bottom pivot of the miter gate of the present invention.
Fig. 3 is a top view of a flexible seal of the present invention.
Fig. 4 is a cross-sectional view of fig. 2 at the flexible seal.
In the figure: the device comprises a bottom hinge upper cover 1, a bearing bush 2, a mushroom head 3, a bottom hinge base 4, a bolt 5, a pressing plate 6, a flexible sealing element 7 and a pillow block 8.
Detailed Description
A method of preventing permanent displacement of the miter gate bottom pivot, comprising the steps of:
step 1: sealing mechanisms are arranged on the horizontal plane on the side of the support and pillow block 8 of the bottom pivot base 4 and the upper plane of the bottom pivot mushroom head 3 chassis, and the sealing mechanisms are arranged in the annular direction of the horizontal plane on the side of the support and pillow block 8 of the bottom pivot base 4;
step 2: when the ship lock operates normally, the miter gate is fully closed;
and step 3: the water filling valve is opened to fill water into the gate chamber;
and 4, step 4: the herringbone gate is closed under the action of the difference between the water levels of the upstream and the downstream;
and 5: when silt is filled between the support cushion blocks and the pillow cushion blocks of the miter gate, the support cushion blocks and the pillow cushion blocks cannot be in close contact, and the water leakage phenomenon exists;
step 6: forming water flow between the pillow blocks to impact silt between the pillow blocks and wash away the silt from the pillow blocks;
and 7: a gap is formed between the support and the pillow block, the water pressure borne by the miter gate presses the miter gate to the gate head side pier to drive the bottom pivot to move towards the bottom pivot base, and the gap between the mushroom head of the bottom pivot and the bottom pivot base is reduced;
and 8: and (5) repeating the step (2) to the step (7) until the sediment between the support cushion blocks and the pillow cushion blocks are completely impacted, and the support cushion blocks and the pillow cushion blocks are in close contact, so that the mushroom head of the bottom pivot is in close contact with the base of the bottom pivot, and the state of the miter gate is recovered to be normal.
The sealing mechanism comprises a bolt 5, a pressing plate 6 and a flexible sealing element 7, the section of the flexible sealing element 7 is rectangular, the thickness of the flexible sealing element is 5mm, the flexible sealing element is partially circular and made of rubber, the flexible sealing element 7 covers the vertical contact surface of the bottom pivot base 4 and the mushroom head 3, the outer side of the flexible sealing element 7 is installed on the horizontal plane on the side of the support and pillow block, the inner side of the flexible sealing element 7 is placed on the upper plane of the bottom pivot mushroom head chassis, the radius of the inner side of the flexible sealing element 7 is 3-5 mm larger than the radius of the inner circle on the upper plane of the mushroom head 3 chassis, and the flexible sealing element 7 is fixed on the horizontal plane on the side of the support and pillow block of the bottom pivot base by the pressing plate and the bolt; the pressing plate 6 is in a partial circular ring shape, the radius of the inner side of the pressing plate is 3-5 mm larger than that of the base, and the pressing plate is used for installing and fixing the flexible sealing element 7; a plurality of screw holes are processed on the horizontal planes at the side of the base support and the pillow block of the bottom pivot for installing bolts 5.
Example 1
The maximum working water head of a single-stage large high-water-head ship lock is 27m, and the size of a lock chamber is 120m multiplied by 18m multiplied by 3.5m (length multiplied by width multiplied by threshold water depth). The gate chamber working gate is a herringbone gate, and the herringbone gate comprises a gate leaf, a top pivot, a bottom pivot, a support pillow cushion block, a bottom water stop and the like.
As shown in FIG. 1, FIG. 1 is a side view of the arrangement of a bottom pivot device of a herringbone door without adopting the herringbone door, a bottom pivot widely applied to the herringbone door, a mushroom head 3 bears horizontal force generated by the gravity of the herringbone door and the overturning moment of the herringbone door, and the horizontal force is transmitted to a fan-shaped base 4 buried and fixed on a side pier; does not bear the water pressure when retaining water. When the miter gate is closed to block water, the ship lock discharges river water downwards to the miter gate, then the ship lock rebounds, silt is deposited on a crossing part of the miter gate and a downstream gate wall, namely a downstream threshold at a bottom pivot, when the miter gate is opened after the silt forms a certain height, the miter gate is inverted to the bottom pivot, silt is filled between a miter gate support cushion and a pillow block, and the miter gate support cushion and the pillow block are accumulated on a bottom pivot mushroom head 3 and a base 4. When the herringbone door is closed after silt is filled between the support cushion blocks and the pillow blocks of the herringbone door, the herringbone door does not reach a certain position of full closing, no gap exists between the support cushion blocks and the pillow blocks, and when the herringbone door is closed continuously, the support cushion blocks and the pillow blocks displace the bottom of the herringbone door outwards under the extrusion action of the silt, so that a gap appears between the vertical contact surfaces of the mushroom head 3 and the base 4 of the bottom hinge, and the accumulated silt enters the gap, so that the bottom hinge can not return permanently during operation.
As shown in fig. 2, fig. 2 is a side view of a gable bottom hinge assembly arrangement employing the present invention. The herringbone door is completely closed, the water filling valve is opened, and water is filled into the gate chamber. The herringbone door is closed under the action of the difference between the water levels of the upstream and the downstream. Silt is filled between the herringbone gate support and the pillow block, the herringbone gate support and the pillow block cannot be in close contact, and the water leakage phenomenon exists. The water flow formed between the pillow blocks impacts the silt between the pillow blocks to wash away the silt from the pillow blocks. A gap is formed between the support cushion block and the pillow cushion block, the water pressure borne by the herringbone door presses the herringbone door to a gate head side pier to drive the whole bottom pivot (the bottom pivot upper cover 1, the bearing bush 2 and the mushroom head 3) to move to the bottom pivot base 4, after a sealing mechanism consisting of a bolt 5, a pressing plate 6 and a rubber 7 is installed on the bottom pivot mushroom head 3 and the bottom pivot base 4, no silt enters between the bottom pivot mushroom head 3 and the bottom pivot base 4 to form a gap, the bottom pivot mushroom head 3 is in close contact with the bottom pivot base 4 under the action of the water pressure, the bottom pivot returns, and the state of the herringbone gate returns to be normal.
After the device is adopted, when the miter gate is completely closed under the action of 27m water head pressure, after the device is installed, water flow impact is formed between the support and the pillow blocks of the bottom pivot, silt is flushed away from the support and the pillow blocks and does not enter between the mushroom head of the bottom pivot and the base of the bottom pivot, the bottom pivot returns under the action of the water pressure, the water sealing function failure of the support and the pillow blocks is avoided, the force transmission function failure of the support and the pillow blocks is avoided, the bottom pivot is prevented from bearing the water pressure, and the operation safety of the miter gate is guaranteed.
Claims (4)
1. A method of preventing permanent displacement of the miter gate bottom pivot, comprising the steps of:
step 1: sealing mechanisms are arranged on the upper horizontal plane of the support and pillow block sides of the bottom pivot base (4) and the upper plane of the bottom pivot mushroom head (3) chassis, and are arranged in the annular direction of the upper horizontal plane of the support and pillow block sides of the bottom pivot base (4);
step 2: when the ship lock operates normally, the miter gate is fully closed;
and 3, step 3: the water filling valve is opened to fill water into the gate chamber;
and 4, step 4: the herringbone gate is closed under the action of the water level difference between the upstream and the downstream;
and 5: when silt is filled between the support cushion blocks and the pillow cushion blocks of the miter gate, the support cushion blocks and the pillow cushion blocks cannot be in close contact, and the water leakage phenomenon exists;
and 6: forming water flow between the pillow blocks to impact silt between the pillow blocks and wash away the silt from the pillow blocks;
and 7: a gap is formed between the support cushion block and the pillow cushion block, the water pressure borne by the miter gate presses the miter gate to the gate head side pier to drive the bottom pivot to move towards the bottom pivot base, and the gap between the mushroom head of the bottom pivot and the bottom pivot base is reduced;
and 8: and (5) repeating the step (2) to the step (7) until the sediment between the support cushion blocks and the pillow cushion blocks are completely impacted, and the support cushion blocks and the pillow cushion blocks are in close contact, so that the mushroom head of the bottom pivot is in close contact with the base of the bottom pivot, and the state of the miter gate is recovered to be normal.
2. A method of preventing permanent displacement of the miter gate foot according to claim 1, wherein: the sealing mechanism in the step 1 comprises a flexible sealing element (7), the flexible sealing element (7) covers the vertical contact surface of the mushroom head (3) and the bottom pivot base (4), the outer side of the flexible sealing element (7) is installed on the horizontal plane on the side of the support and pillow block through a pressing plate (6) and a bolt (5), and the inner side of the flexible sealing element (7) is placed on the plane on the chassis of the mushroom head (3).
3. A method of preventing permanent displacement of the miter gate foot according to claim 1, wherein: the flexible sealing element (7) is processed by rubber and is partially circular in overall shape.
4. A method of preventing permanent displacement of the miter gate foot according to claim 1, wherein: the inner diameters of the flexible sealing element (7) and the pressing plate (6) are 3-5 mm larger than the inner diameter of the upper plane of the mushroom head (3) chassis.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210878988.6A CN115110505B (en) | 2022-07-25 | 2022-07-25 | Method for preventing bottom pivot of herringbone gate from permanently shifting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210878988.6A CN115110505B (en) | 2022-07-25 | 2022-07-25 | Method for preventing bottom pivot of herringbone gate from permanently shifting |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115110505A true CN115110505A (en) | 2022-09-27 |
| CN115110505B CN115110505B (en) | 2023-11-28 |
Family
ID=83334707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210878988.6A Active CN115110505B (en) | 2022-07-25 | 2022-07-25 | Method for preventing bottom pivot of herringbone gate from permanently shifting |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115110505B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050002737A1 (en) * | 2001-11-13 | 2005-01-06 | Martin Cullen | Watertight gate mechanism |
| US7037039B1 (en) * | 2004-07-06 | 2006-05-02 | Johnson Machine Works, Inc. | Method and apparatus for an improved lock and dam assembly |
| US20070160426A1 (en) * | 2005-12-21 | 2007-07-12 | Oiles Corporation | Spherical bearing for lock gate door and lock gate door having the same |
| JP2008045348A (en) * | 2006-08-17 | 2008-02-28 | Ihi Corp | Bottom-sealing device of rotary type gate |
| DE102007011290A1 (en) * | 2007-03-08 | 2008-09-18 | Lücking, Karl-Heinz | Movable barrier for lock, has blocking wall, locking gate, and support for seal gaps to receive lifting force, compressive force and flow force, where gate is formed as floating body that can flown in and pump out |
| CN105887772A (en) * | 2016-05-26 | 2016-08-24 | 江苏省交通规划设计院股份有限公司 | Fixed-type bottom pivot for miter gate |
| CN212561458U (en) * | 2020-06-11 | 2021-02-19 | 中国电建集团华东勘测设计研究院有限公司 | Ship lock with flood discharge and sand discharge functions |
| CN113216096A (en) * | 2021-05-06 | 2021-08-06 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element and in-situ maintenance method |
| CN214883457U (en) * | 2021-05-06 | 2021-11-26 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element end connecting device |
| WO2022017542A1 (en) * | 2020-11-30 | 2022-01-27 | 中国长江三峡集团有限公司 | Water retaining and flushing stoplog gate for lock chamber water-drained overhauling, and drainage method |
| CN217026953U (en) * | 2022-04-11 | 2022-07-22 | 四川省水利电力工程局有限公司 | Herringbone door for brake head |
-
2022
- 2022-07-25 CN CN202210878988.6A patent/CN115110505B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050002737A1 (en) * | 2001-11-13 | 2005-01-06 | Martin Cullen | Watertight gate mechanism |
| US7037039B1 (en) * | 2004-07-06 | 2006-05-02 | Johnson Machine Works, Inc. | Method and apparatus for an improved lock and dam assembly |
| US20070160426A1 (en) * | 2005-12-21 | 2007-07-12 | Oiles Corporation | Spherical bearing for lock gate door and lock gate door having the same |
| JP2008045348A (en) * | 2006-08-17 | 2008-02-28 | Ihi Corp | Bottom-sealing device of rotary type gate |
| DE102007011290A1 (en) * | 2007-03-08 | 2008-09-18 | Lücking, Karl-Heinz | Movable barrier for lock, has blocking wall, locking gate, and support for seal gaps to receive lifting force, compressive force and flow force, where gate is formed as floating body that can flown in and pump out |
| CN105887772A (en) * | 2016-05-26 | 2016-08-24 | 江苏省交通规划设计院股份有限公司 | Fixed-type bottom pivot for miter gate |
| CN212561458U (en) * | 2020-06-11 | 2021-02-19 | 中国电建集团华东勘测设计研究院有限公司 | Ship lock with flood discharge and sand discharge functions |
| WO2022017542A1 (en) * | 2020-11-30 | 2022-01-27 | 中国长江三峡集团有限公司 | Water retaining and flushing stoplog gate for lock chamber water-drained overhauling, and drainage method |
| CN113216096A (en) * | 2021-05-06 | 2021-08-06 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element and in-situ maintenance method |
| CN214883457U (en) * | 2021-05-06 | 2021-11-26 | 中国葛洲坝集团第一工程有限公司 | Jacking-free gate bottom pivot sealing element end connecting device |
| CN217026953U (en) * | 2022-04-11 | 2022-07-22 | 四川省水利电力工程局有限公司 | Herringbone door for brake head |
Non-Patent Citations (2)
| Title |
|---|
| 吉智勇: "潼南航电枢纽工程刚性止水人字闸门安装技术", 《四川水力发电》, pages 75 - 76 * |
| 李玲君等: "人字闸门固定式底枢改进设计", 《水运工程》, pages 131 - 135 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115110505B (en) | 2023-11-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6338594B1 (en) | Movable barrier wall | |
| JP5702276B2 (en) | Self-closing flood barrier and method for protecting hinterland using it | |
| KR101011510B1 (en) | Radial gate opening and shutting apparatus for floodgate | |
| CN105756027A (en) | Steel floating box anti-icing device suitable for semi-submersible platform in polar ice area | |
| CN115110505A (en) | Method for preventing bottom pivot of miter gate from permanently moving | |
| CN103215927A (en) | Hydraulic buried telescopic anti-flooding door | |
| CN213952172U (en) | High water head valve top stagnant water fixing device | |
| CN110924884B (en) | Drilling tool float valve with automatic protection | |
| CN106930246B (en) | Unpowered automatic water filling and draining counterweight gate | |
| CN111778987A (en) | Underground diaphragm wall door type emergency plugging device and method | |
| CN203188181U (en) | Hydraulic embedded extensible submergence resistant door | |
| CN2408314Y (en) | Composite double sealed wedge valve | |
| CN113684794A (en) | Spillway device with function of preventing influence of surge of ultrahigh landslide body and using method | |
| CN110131455B (en) | Protective valve for failure of pressure reducing valve | |
| CN112554132A (en) | Sediment discharge dam | |
| CN109235378B (en) | Rear-mounted flap valve water filling valve driven by gears | |
| CN219490840U (en) | High-efficient durable flood control dyke | |
| KR200361764Y1 (en) | Floodgate for dam mounting | |
| CN205421220U (en) | Anti ice device of steel flotation tank suitable for polar region ice formation semi -submerged formula platform | |
| CN220956896U (en) | Wedge gate valve | |
| CN219035668U (en) | Check valve | |
| CN114319255B (en) | Top-exposed arc gate system provided with stoplog type anti-overflow sliding gate leaf and gate opening and closing method | |
| CN218990077U (en) | Leakage-proof buried gate | |
| CN115839066B (en) | Recoverable aviation rescue shutoff breach caisson | |
| CN219886720U (en) | Water gate bottom seepage-proofing and water-stopping structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230913 Address after: 443000 No. 6 Xiba Road, Xiling District, Yichang City, Hubei Province Applicant after: Yichang Three Gorges Navigation Engineering Technology Co.,Ltd. Applicant after: THREE GORGES NAVIGATION AUTHORITY Address before: No.12, shangdaodi Road, Xiling District, Yichang City, Hubei Province Applicant before: THREE GORGES NAVIGATION AUTHORITY |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |