CN111945677B - Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof - Google Patents
Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof Download PDFInfo
- Publication number
- CN111945677B CN111945677B CN202010862594.2A CN202010862594A CN111945677B CN 111945677 B CN111945677 B CN 111945677B CN 202010862594 A CN202010862594 A CN 202010862594A CN 111945677 B CN111945677 B CN 111945677B
- Authority
- CN
- China
- Prior art keywords
- gate
- double
- box type
- panel box
- sand blocking
- 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.)
- Active
Links
Images
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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B8/00—Details of barrages or weirs ; Energy dissipating devices carried by lock or dry-dock gates
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Barrages (AREA)
Abstract
The invention discloses a method for reducing the negative pressure at the bottom of a plane gate and a plane gate structure thereof, 1, the lower part of a sand blocking plane gate is arranged into a double-panel box type gate blade, the bottom edge sealing plate of the double-panel box type gate blade is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is arranged on a beam web plate in the double-panel box type gate blade; and 2, transversely arranging an arc pipe groove with a downward opening on the plate surface of the bottom edge sealing plate along the plane gate, then arranging a vertical pipe in the double-panel box-type door leaf, wherein the vertical pipe penetrates through a cross beam web plate in the double-panel box-type door leaf, a lower pipe orifice of the vertical pipe is communicated with the arc pipe groove, and an upper pipe orifice of the vertical pipe extends out of the upper part of the sand blocking plane gate to supplement air to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is higher than the water surface and supplement water to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is lower than the water surface. The invention solves the problem that the lower part of the gate generates negative pressure to influence the opening and closing of the gate due to silt deposition of the sand blocking plane gate, and greatly reduces the viscous force of a single-side gate panel.
Description
Technical Field
The invention relates to a sand blocking plane gate in a hydraulic junction project, in particular to a method for reducing negative pressure at the bottom of the plane gate and a plane gate structure thereof.
Background
Aiming at the characteristics of a river with much silt, a sand blocking plane gate is required to be arranged at the inlet section of a sand discharge hole in order to prevent siltation in the sand discharge hole in the hydraulic junction engineering. However, the influence of silt on the opening and closing force of the gate is not specified in the water conservancy industry standard, and is often determined according to experiments. The test gate is simulated by adopting a steel plate, and the design working conditions are that the single face has silt, so the comprehensive viscous force index of the silt given by the test on the gate panel and the gate slot is difficult to open and close the sand blocking plane gate in the actual engineering operation process, the sand blocking plane gate can be opened or closed usually after the opening and closing of the sand blocking plane gate is ceaselessly performed for several hours, and the reason is rarely explored for years.
In recent years, in order to prolong the service life of the sand blocking reservoir capacity, the reservoir of a sediment-laden river mostly adopts an effective low-level sand discharge mode, namely, silt in a reservoir area is pulled to the front of a gate, the content of the silt in a sand discharge hole is very high in the process of sand discharge of an outlet control gate, so that dozens of centimeters of silt fall off in the sand discharge hole as long as the outlet control gate is closed, the gate of a sand blocking plane is not closed tightly, and the gate of the sand blocking plane cannot be opened when the gate of the sand blocking plane is opened after a period of time, the inspection shows that the whole bottom edge of the gate of the sand blocking plane is buried in the silt (namely, the upper side and the lower side of the bottom edge of the gate of the sand blocking plane are buried in the silt), but not the single side of the gate, and the situation often occurs in a flood season, and an unconventional means is often adopted to lift the gate of the sand blocking plane, thereby bringing hidden danger to engineering safety.
In addition, in the process of closing the plane gate by moving water or opening the plane gate by moving water, the inclination angle of more than or equal to 30 degrees is set on the downstream side of the bottom edge of the gate blade according to the water conservancy industry standard requirement, and when the inclination angle cannot be met, air supplement measures are required. However, the bottom edge of the gate blade is affected by outlet water flow, and air supplement measures are difficult to find, some air supplement measures adopt that a hole is formed in a web plate of a bottom main beam of the planar gate, air is supplemented through a cavity at the upper part of the bottom beam, but the top of the gate is overflowed and often seals an air inlet channel, so that the bottom edge generates pulsation due to negative pressure to make the gate difficult to open and close, and even the accidents that the gate cannot be closed due to water movement or a steel wire rope is broken occur.
Disclosure of Invention
The invention aims to provide a method for reducing negative pressure at the bottom of a plane gate, and the plane gate structure is further provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention discloses a method for reducing negative pressure at the bottom of a plane gate, which comprises the following steps:
step 1, arranging the lower part of a sand blocking plane gate into a double-panel box type gate leaf, wherein the height of the double-panel box type gate leaf is greater than the silt burying height so as to reduce the silt viscous force around the double-panel box type gate leaf; the bottom edge sealing plate of the double-panel box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-panel box type door leaf so as to prevent the influence of buoyancy and the self weight of water in a closed cavity on the opening and closing force;
step 2, in order to eliminate the lower suction force generated by the negative pressure at the lower part of the double-panel box type door leaf, an arc pipe groove with a downward opening is transversely arranged on the panel surface of the bottom edge sealing plate along the plane gate; then, a vertical pipe is arranged in the double-panel box type door leaf, the vertical pipe penetrates through the cross beam web plate in the double-panel box type door leaf, a lower pipe orifice of the vertical pipe is communicated with the arc pipe groove, and an upper pipe orifice of the vertical pipe extends out of the upper part of the sand blocking plane gate to supplement air to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is higher than the water surface and supplement water to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is lower than the water surface.
Preferably, the diameter of the circular arc pipe groove is larger than or equal to that of the stand pipe; the number of the vertical pipes arranged in the double-panel box type door leaf is multiple, the horizontal distance between every two adjacent vertical pipes is 80-110cm, the height of the top of each vertical pipe above the sand blocking plane gate is more than or equal to 10cm, and the diameter of each vertical pipe is more than or equal to 20 cm.
Preferably, the angle of the bottom edge sealing plate inclining upwards and downwards is more than or equal to 30 degrees.
The plane gate structure for realizing the method for reducing the negative pressure at the bottom of the plane gate comprises a plane gate body, wherein the lower part of the plane gate body is of a double-panel box type gate leaf structure, and the height of the double-panel box type gate leaf is greater than the silt burying height; the bottom edge sealing plate of the double-sided board box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-sided board box type door leaf; the bottom edge sealing plate is characterized in that an arc tube groove with a downward opening is transversely arranged on the plate surface of the bottom edge sealing plate along the plane gate body, a plurality of vertical tubes are arranged in the double-panel box-type gate leaf, each vertical tube penetrates through the cross beam web plate in the double-panel box-type gate leaf, the lower tube opening of each vertical tube is communicated with the arc tube groove, and the top of the sand blocking plane gate extending out of the upper tube opening of each vertical tube is not less than 10 cm.
The invention has the advantages that the reason for the difficulty in opening/closing the panel of the unilateral gate is found, namely, silt accumulated on the upper and lower sides of the lower part of the sand blocking plane gate has the characteristic of weak water permeability, so that negative pressure is generated on the lower part of the sand blocking plane gate, and the negative pressure is a main factor for causing the difficulty in opening/closing the sand blocking plane gate; through experimental tests, the lower suction force generated by the negative pressure existing at the lower part of the gate in the process of opening the gate by standing water, for example, for a gate with the width of 5.4m and the thickness of 1.5m, the lower suction force of a maximum atmospheric pressure of 810kN can be generated, and the influence on the door opening force is great. Therefore, the invention not only solves the problem that the lower part of the gate generates negative pressure to influence the opening and closing of the gate due to silt deposition of the sand blocking plane gate, greatly reduces the viscous force of a single-side gate panel, but also solves the problem of effective air supply measures required when the downstream inclination angles of the accident gate and the working gate cannot meet the requirements. Meanwhile, the sand blocking plane gate structure has no influence on the original gate structure, is simple to process, manufacture and transform, and is stable in gate operation, so that the reliability of safe operation of the sand blocking plane gate is improved, the opening and closing force of the sand blocking plane gate is reduced, and the investment of gate opening and closing equipment is saved.
Drawings
Fig. 1 is a schematic structural view of the double-panel box door leaf of the present invention.
Fig. 2 is a schematic sectional view taken along line a-a of fig. 1.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, the method for reducing the negative pressure at the bottom of the plane gate comprises the following steps:
step 1, setting the lower part of a sand blocking plane gate into a double-panel box type gate leaf 1, wherein the height of the double-panel box type gate leaf 1 is greater than the silt burying height of the upstream side and the downstream side of the double-panel box type gate leaf 1 so as to reduce the silt viscous force around the double-panel box type gate leaf 1; the bottom edge sealing plate 2 of the double-panel box type door leaf 1 is an inclined plane which inclines more than or equal to 30 degrees upwards towards the downstream side, and a water leakage port 4 is formed in a cross beam web plate 3 in the double-panel box type door leaf 1 so as to prevent buoyancy and the self weight of a water body in a closed cavity from generating influence on opening and closing force;
step 2, in order to eliminate the lower suction force generated by the negative pressure at the lower part of the double-panel box type door leaf 1, an arc pipe groove 5 with a downward opening is transversely arranged on the panel surface of the bottom edge sealing plate 2 along the plane gate; then, a riser 6 is provided in the double-panel box door leaf 1.
Now, the hoist is used for opening and closing the sand blocking plane gate at the conventional speed of 2.5m/min as an example for description:
the width of the sand blocking plane gate is 5.4m (4.2 m after the edge beam is planed off), the thickness of the double-panel box type door leaf 1 is 1.5m, four vertical pipes 6 (air supplement or water supplement) with the diameter of 20cm are selected, and the diameter of the circular arc pipe groove 5 is 30 cm.
Four stand pipes 6 penetrate through the beam web 3 in the double-panel box type door leaf 1 and are arranged at intervals, the lower pipe openings of the four stand pipes 6 are communicated with the arc pipe groove 5, and the upper pipe openings of the four stand pipes 6 extend out of the top of the sand blocking plane gate by 30 cm.
The four vertical pipes 6 have the functions of supplying air to the lower part of the sand blocking plane gate when the upper pipe orifices of the vertical pipes 6 are higher than the water surface and supplying water to the lower part of the sand blocking plane gate when the upper pipe orifices of the vertical pipes 6 are lower than the water surface.
The plane gate structure comprises a plane gate body, wherein the lower part of the plane gate body is of a double-panel box type gate leaf 1 structure, and the height of the double-panel box type gate leaf 1 is greater than the silt burying height; the bottom edge sealing plate 2 of the double-sided board box type door leaf 1 is an inclined plane which inclines more than or equal to 30 degrees upwards towards the downstream side, and a water leakage port 4 is formed in a cross beam web plate 3 in the double-sided board box type door leaf 1; the bottom edge sealing plate 2 is transversely welded with an arc pipe groove 5 with a downward opening along the plane gate body on the plate surface, four vertical pipes 6 are arranged in the double-panel box type gate leaf 1, each vertical pipe 6 penetrates through the beam web 3 in the double-panel box type gate leaf 1, the lower pipe opening of each vertical pipe 6 is communicated with the arc pipe groove 5, and the upper pipe opening of each vertical pipe 6 extends out of the top of the sand blocking plane gate by 30 cm.
Claims (4)
1. A method for reducing negative pressure at the bottom of a plane gate is characterized in that: the method comprises the following steps:
step 1, arranging the lower part of a sand blocking plane gate into a double-panel box type gate leaf, wherein the height of the double-panel box type gate leaf is greater than the silt burying height so as to reduce the silt viscous force around the double-panel box type gate leaf; the bottom edge sealing plate of the double-panel box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-panel box type door leaf so as to prevent the influence of buoyancy and the self weight of water in a closed cavity on the opening and closing force;
step 2, in order to eliminate the lower suction force generated by the negative pressure at the lower part of the double-panel box type door leaf, an arc pipe groove with a downward opening is transversely arranged on the panel surface of the bottom edge sealing plate along the plane gate; then, a vertical pipe is arranged in the double-panel box type door leaf, the vertical pipe penetrates through the cross beam web plate in the double-panel box type door leaf, a lower pipe orifice of the vertical pipe is communicated with the arc pipe groove, and an upper pipe orifice of the vertical pipe extends out of the top of the sand blocking plane gate, so that the effects of supplying air to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is higher than the water surface and supplying water to the lower part of the sand blocking plane gate when the upper pipe orifice of the vertical pipe is lower than the water surface are achieved.
2. The method for reducing the negative pressure at the bottom of a flat gate according to claim 1, wherein: the diameter of the arc pipe groove is larger than or equal to that of the vertical pipe; the number of the vertical pipes arranged in the double-panel box type door leaf is multiple, the horizontal distance between every two adjacent vertical pipes is 80-110cm, the height of the top of each vertical pipe above the sand blocking plane gate is more than or equal to 10cm, and the diameter of each vertical pipe is more than or equal to 20 cm.
3. The method for reducing the negative pressure at the bottom of a flat gate according to claim 1 or 2, wherein: the angle of inclination of the bottom edge sealing plate towards the upper part of the downstream side is more than or equal to 30 degrees.
4. The method for reducing the negative pressure at the bottom of a flat gate according to claim 1, wherein: the lower part of the sand blocking plane gate is of a double-panel box type gate leaf structure, and the height of the double-panel box type gate leaf is greater than the silt burying height; the bottom edge sealing plate of the double-sided board box type door leaf is an inclined plane inclined towards the upper part of the downstream side, and a water leakage port is formed in a cross beam web plate in the double-sided board box type door leaf; the bottom edge sealing plate is characterized in that an arc tube groove with a downward opening is transversely formed in the plate surface of the bottom edge sealing plate along the plane gate body, a plurality of vertical tubes are arranged in the double-panel box type gate leaf, each vertical tube penetrates through the cross beam web plate in the double-panel box type gate leaf, a lower tube opening of each vertical tube is communicated with the arc tube groove, and an upper tube opening of each vertical tube extends out of the top of the sand blocking plane gate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862594.2A CN111945677B (en) | 2020-08-25 | 2020-08-25 | Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010862594.2A CN111945677B (en) | 2020-08-25 | 2020-08-25 | Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111945677A CN111945677A (en) | 2020-11-17 |
| CN111945677B true CN111945677B (en) | 2021-08-03 |
Family
ID=73366328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010862594.2A Active CN111945677B (en) | 2020-08-25 | 2020-08-25 | Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111945677B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU675122A1 (en) * | 1976-05-05 | 1979-07-25 | Всесоюзный Ордена Ленина Научно-Исследовательский И Проектный Институт Гидропроект Им. С.Я.Жука Ленинградское Отделение | Deep water conduit gate |
| JPS6092509A (en) * | 1983-10-27 | 1985-05-24 | Marushima Suimon Seisakusho:Kk | Cylinder gate |
| CN203256704U (en) * | 2013-05-14 | 2013-10-30 | 中国水电顾问集团贵阳勘测设计研究院 | Water filling and pressure balancing device used for plane gate |
| JP2014015815A (en) * | 2012-07-11 | 2014-01-30 | Chugoku Electric Power Co Inc:The | Intake device |
| CN103911973A (en) * | 2014-03-24 | 2014-07-09 | 黄河勘测规划设计有限公司 | Sand blocking and water taking gate for hydraulic engineering |
| CN204356739U (en) * | 2014-12-22 | 2015-05-27 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of gate structure with New type ventilating hole |
| CN206173906U (en) * | 2016-08-10 | 2017-05-17 | 河南省水利勘测设计研究有限公司 | Steel gate is overhauld to width adjustable body formula in drill way |
| CN109629529A (en) * | 2019-01-25 | 2019-04-16 | 天津大学 | A kind of gate Vertical Vibration Reduction and root edge adjustable systems |
| CN111172952A (en) * | 2020-02-14 | 2020-05-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method and structure of tidal bore accident prevention gate |
-
2020
- 2020-08-25 CN CN202010862594.2A patent/CN111945677B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU675122A1 (en) * | 1976-05-05 | 1979-07-25 | Всесоюзный Ордена Ленина Научно-Исследовательский И Проектный Институт Гидропроект Им. С.Я.Жука Ленинградское Отделение | Deep water conduit gate |
| JPS6092509A (en) * | 1983-10-27 | 1985-05-24 | Marushima Suimon Seisakusho:Kk | Cylinder gate |
| JP2014015815A (en) * | 2012-07-11 | 2014-01-30 | Chugoku Electric Power Co Inc:The | Intake device |
| CN203256704U (en) * | 2013-05-14 | 2013-10-30 | 中国水电顾问集团贵阳勘测设计研究院 | Water filling and pressure balancing device used for plane gate |
| CN103911973A (en) * | 2014-03-24 | 2014-07-09 | 黄河勘测规划设计有限公司 | Sand blocking and water taking gate for hydraulic engineering |
| CN204356739U (en) * | 2014-12-22 | 2015-05-27 | 中国电建集团贵阳勘测设计研究院有限公司 | A kind of gate structure with New type ventilating hole |
| CN206173906U (en) * | 2016-08-10 | 2017-05-17 | 河南省水利勘测设计研究有限公司 | Steel gate is overhauld to width adjustable body formula in drill way |
| CN109629529A (en) * | 2019-01-25 | 2019-04-16 | 天津大学 | A kind of gate Vertical Vibration Reduction and root edge adjustable systems |
| CN111172952A (en) * | 2020-02-14 | 2020-05-19 | 中国电建集团贵阳勘测设计研究院有限公司 | Construction method and structure of tidal bore accident prevention gate |
Non-Patent Citations (3)
| Title |
|---|
| 缅甸耶涯水电站泄水底孔金属结构设计;李大伟等;《东北水利水电》;20100915(第09期);第23-25页 * |
| 西霞院反调节水库排沙系统工作闸门设计;侯庆宏等;《人民黄河》;20080620(第06期);第81-82页 * |
| 西霞院工程金属结构设备主要创新点;姚宏超等;《人民黄河》;20091020(第10期);第31-34页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111945677A (en) | 2020-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103541345B (en) | Aqueous vapor separate vacuum preloading and device | |
| WO2020125602A1 (en) | Deep water obtaining system and operating method therefor | |
| CN101029574A (en) | Long standpipe gas extraction in worked-out section | |
| CN111945677B (en) | Method for reducing negative pressure at bottom of plane gate and plane gate structure thereof | |
| CN212956419U (en) | Sand blocking plane gate structure | |
| CN213867669U (en) | Gate chamber drainage maintenance water retaining flushing stop log door | |
| CN212200334U (en) | A manger plate dam for hydraulic and hydroelectric engineering | |
| CN106638504A (en) | Energy dissipation and erosion control structure used for energy dissipation by bottom flow and used in water conservancy project | |
| CN109385983A (en) | It is provided with the gravity dam of surface spillways | |
| CN210031702U (en) | Down-the-hole type upstream water stop accident access door anti-water injection door head | |
| CN212772231U (en) | Structure of gate for preventing moisture gushing accident | |
| CN212925954U (en) | Flood control dam for hydraulic engineering | |
| CN111172952B (en) | Construction method and structure of tidal bore accident prevention gate | |
| CN112459017A (en) | Water retaining and flushing stop log door for drainage maintenance of lock chamber and drainage method | |
| CN107761681A (en) | One kind suspension floatation type sewage blocking device | |
| CN211057746U (en) | Multistage emptying tunnel hydraulics monitoring system | |
| CN111101487A (en) | Novel overhaul gate | |
| CN113322907A (en) | Drainage aeration system of upper and lower stream intercommunication | |
| CN211849365U (en) | Raft for raft floating dam | |
| CN215329800U (en) | Navigation facility gap water filling and pressure equalizing device | |
| CN108221846B (en) | Pressureless flow-to-pressured flow state conversion facility | |
| CN206859185U (en) | It is a kind of that there is the new build deep hole for reducing outlet stream horizontal proliferation function | |
| CN110593225B (en) | Multistage atmospheric hole hydraulics monitoring system | |
| Liu et al. | Application of Pneumatic Desilting Technology in Zhentou Dam-I Hydropower Station | |
| CN110552737A (en) | Flow guiding device for mine drainage roadway |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |