CN107740387B - Hydroelectric power generation guide wall structure and guide wall dismantling method - Google Patents

Hydroelectric power generation guide wall structure and guide wall dismantling method Download PDF

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Publication number
CN107740387B
CN107740387B CN201711164457.6A CN201711164457A CN107740387B CN 107740387 B CN107740387 B CN 107740387B CN 201711164457 A CN201711164457 A CN 201711164457A CN 107740387 B CN107740387 B CN 107740387B
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guide
water
upstream
port
power generation
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CN107740387A (en
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王军峰
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Hunan Xiangtou Qingshuitang Hyropower Development Co ltd
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Hunan Xiangtou Qingshuitang Hyropower Development Co ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B9/00Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
    • E02B9/02Water-ways
    • E02B9/04Free-flow canals or flumes; Intakes
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04GSCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00Working measures on existing buildings
    • E04G23/08Wrecking of buildings
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/20Hydro energy
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/50Manufacturing or production processes characterised by the final manufactured product

Abstract

The invention provides a hydroelectric power generation guide wall structure and a guide wall dismantling method. The hydroelectric power generation guide wall structure comprises a guide wall and a power generation dam, wherein the guide wall is arranged on two side parts of the power generation dam, the guide wall comprises an upstream guide wall, a downstream guide wall and a water guide port, the upstream guide wall and the downstream guide wall are respectively arranged on two side parts of the power generation dam, and the water guide port is arranged on the upstream guide wall or the downstream guide wall. The hydroelectric power generation guide wall structure provided by the invention adopts a structure that the guide wall is provided with the water guide opening, so that the flow speed and the flow direction of upstream water flow can be optimized, the flow speed of the water flow is increased, vortexes are reduced, the generated energy can be increased, and the vibration of a generator is reduced.

Description

Hydroelectric power generation guide wall structure and guide wall dismantling method
Technical Field
The invention belongs to the field of hydropower development equipment, and particularly relates to a hydroelectric power generation guide wall structure and a guide wall dismantling method.
Background
The problem of insufficient water inflow of power generation water is easy to occur at an upstream water inlet of a hydropower station. In the flood season, the right-angle structure formed by the side guide wall of the power generation dam is easy to cause the water inlet of the power generation dam to generate vortex. The reason for the occurrence of eddies is: the tail water at the downstream of the power generation dam is high in the flood season, forward water inflow at the upstream of the power generation dam is insufficient, water is supplemented laterally through the guide wall, after forward water inflow at the upstream of the power generation dam is converged with transverse water flow intercepted by the guide wall, vortex-shaped water flow is easily formed, the vortex water flow changes the water flow state of a water inlet of the power generation dam, the water level is reduced, output of multiple units is reduced, meanwhile, the units are greatly vibrated when running, and the benefit and safety of a power station are affected. The longitudinal guide wall is too high possibly to influence the water flow state, and the concrete structures on the upper parts of the upstream and downstream guide walls are dismantled in stages, so that the structural limitation of the hydraulic building is considered, and the explosion and expansion modes are not allowed to be adopted. The downstream guide wall is dismantled by adopting an air pick, the upstream water inlet guide wall (51 meters long multiplied by 2 meters wide multiplied by 4 meters high) is dismantled, the underwater dismantling construction difficulty is high, and the construction period is long.
Disclosure of Invention
The invention provides a hydroelectric generation guide wall structure and a guide wall dismantling method, which are used for improving the water level, improving the generating capacity of a unit, reducing the running vibration of the unit, improving the benefit and safety of a power station, reducing the difficulty of guide wall dismantling construction and shortening the construction period, and aims to solve the technical problems that the generating dam of a hydropower station and a side guide wall are easy to form a vortex, so that the flow state of water flow is not good, the water level entering the generating dam is not high, the generating capacity of the unit is low, the running vibration of the unit is large, the benefit and safety of the power station are influenced.
The hydroelectric power generation guide wall structure comprises a guide wall and a power generation dam, wherein the guide wall is arranged at two side parts of the power generation dam, the guide wall comprises an upstream guide wall, a downstream guide wall and a water guide port, the upstream guide wall and the downstream guide wall are respectively arranged at two side parts of the power generation dam, the water guide port is arranged on the upstream guide wall or the downstream guide wall, the water guide port comprises an upstream guide wall water guide port and a downstream guide wall water guide port, the upstream guide wall water guide port is communicated with the two side parts of the upstream guide wall, the downstream guide wall water guide port is communicated with the two side parts of the downstream guide wall, the upstream guide wall water guide port comprises an inclined guide port and a forward guide port, the inclined guide port and the forward guide port are both arranged on the upstream guide wall, and the inclined guide port is arranged on the upstream guide wall close to the power generation dam;
the inclined water guide port is at an angle of 45 degrees;
the length of the inclined water guide nozzle is 6-10 meters, the height of the inclined water guide nozzle is 1-3 meters, the length of the forward water guide nozzle is 15-20 meters, and the height of the forward water guide nozzle is 1-3 meters;
the length of the downstream guide wall water guide port is 15-20 meters, and the height of the downstream guide wall water guide port is 1-3 meters;
the method for dismantling the guide wall of the hydroelectric power generation guide wall structure comprises the following steps:
measuring the existing power generating dam and the existing water guide wall, and designing the dismantling position and size of the water guide wall according to the structure and size of the power generating dam and the water guide wall;
step two, adopting an air pick and a diamond rope to dismantle the upstream guide wall and the downstream guide wall to form an upstream guide wall water guide port and a downstream guide wall water guide port;
and step three, hoisting and carrying the dismantled concrete.
In a preferred embodiment of the hydroelectric power generation guide wall structure provided by the present invention, the number of the inclined water guide ports is two, and the two inclined water guide ports are arranged in parallel.
In a preferred embodiment of the hydroelectric power generation guide wall structure provided by the present invention, the water guide opening is disposed above the upstream guide wall or the downstream guide wall.
The hydroelectric generation guide wall structure has the following beneficial effects:
the structure that sets up the water guide port on leading the wall is adopted, can optimize upstream water flow velocity and flow direction, makes the water flow velocity normal, increases the water yield, solves the water level difference problem, increases the flood peak, reduces the swirl, multiplicable generated energy reduces generator vibration. The downstream guide wall water guide opening can improve the drainage capacity of tail water. The upstream guide wall water guide opening can increase positive water supplement of a water inlet, improve power generation output, increase power generation economic benefits, solve the problem of unsafe unit vibration and further promote sustainable development of a power grid. The inclined water guide opening can supplement water for the power generation water in the side direction, the water flow state of the water inlet of the unit is further improved, the vortex direction is changed, the vortex is reduced, and the horizontal vibration of the unit is reduced. The operation effect is obvious, economic parameters, unit vibration and water flow state all achieve the expected purpose, the operation condition of the hydropower station unit is further improved, the power generation output is improved, and the safe operation of the unit is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a front view of a preferred embodiment of a hydroelectric guide wall structure provided in accordance with the present invention;
fig. 2 is a side view of a preferred embodiment of the hydroelectric guide wall structure shown in fig. 1.
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.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural view of a preferred embodiment of a hydroelectric guide wall structure provided in the present invention; fig. 2 is a side view of a preferred embodiment of the hydroelectric guide wall structure shown in fig. 1.
The hydroelectric power generation guide wall structure 1 comprises a guide wall 12 and a power generation dam 11. The guide walls 12 are arranged on two sides of the power generation dam 11.
The guide wall 12 includes an upstream guide wall 121, a downstream guide wall 122 and a water guide opening 123. The upstream guide wall 121 and the downstream guide wall 122 are respectively disposed at two side portions of the power generating dam 11, and the water guide opening 123 is disposed on the upstream guide wall 121 or the downstream guide wall 122. The water guiding opening 123 is disposed above the upstream guide wall 121 or the downstream guide wall 122.
The water guiding opening 123 includes an upstream water guiding opening 1231 and a downstream water guiding opening 1232. The upstream guide wall water guide opening 1231 is communicated with two side portions of the upstream guide wall 121. The downstream guide wall water guide opening 1232 is communicated with two sides of the downstream guide wall 122.
The upstream guide wall water guide opening 1231 includes a slant guide water guide opening 311 and a forward guide water guide opening 312. The inclined water guide port 311 and the forward water guide port 312 are both provided on the upstream guide wall 121, and the inclined water guide port 311 is provided on the upstream guide wall 121 close to the power generating dam 11. The number of the inclined water guide ports 311 is two, the two inclined water guide ports 311 are arranged in parallel, and the inclined water guide ports 311 are inclined at an angle of 45 degrees. The length of the inclined water guide opening 311 is 6-10 meters, and the height is 1-3 meters. The length of the forward water guide port 312 is 15-20 meters, and the height is 1-3 meters.
The length of the downstream guide wall water guide port 1232 is 15-20 meters, and the height of the downstream guide wall water guide port is 1-3 meters.
The invention provides a guide wall dismantling method applying a hydroelectric power generation guide wall structure, which comprises the following steps:
measuring the existing power generating dam and the existing water guide wall, and designing the dismantling position and size of the water guide wall according to the structure and size of the power generating dam and the water guide wall;
step two, adopting an air pick and a diamond rope to dismantle the upstream guide wall and the downstream guide wall to form an upstream guide wall water guide port and a downstream guide wall water guide port;
and step three, hoisting and carrying the dismantled concrete.
The hydroelectric generation guide wall structure 1 has the following beneficial effects:
the flowing water flows from the upstream to the downstream of the power generation dam 11, namely, flows from the upstream guide wall 121 to the downstream guide wall 122, the flowing water guides the water through the inclined guide water port 311 and the forward guide water port 312, during a flood season, the forward water is supplemented through the forward guide water port 312, the lateral water is supplemented through the inclined guide water port 311, the vortex formed by the flowing water in the corner between the power generation dam 11 and the upstream guide wall 121 when the water guide water port is not arranged is avoided, when the vortex is not arranged, the flowing water cannot change the flowing state of the flowing water entering the power generation dam, the water level is normal, the unit works normally, the unit vibration is avoided, and the benefit and the safety of the power station are improved.
The downstream guide wall 122 is partially removed to form the downstream guide wall water guide opening 1232, so that the tail water drainage capacity is increased, and the generator set of the power generating dam 11 can generate electricity normally. The upstream guide wall 121 is partially removed to form the upstream guide wall water guide opening 1231, specifically, the inclined guide water opening 311 and the forward guide water opening 312 are formed to increase the forward water supplement of the water inlet. The guide wall is dismantled and divided into blocks by using the diamond rope
The structure that sets up on leading wall 12 and leading mouth of a river 123 is adopted, can optimize the velocity of flow and flow direction of upstream rivers, makes the velocity of flow normal, increases the water yield, solves the water level difference problem, increases the flood peak, reduces the swirl, multiplicable generated energy, reduces generator vibration. The downstream guide wall water guide opening 1232 can increase the drainage capacity of tail water. The upstream guide wall water guide port 1231 can increase the positive water supplement of the water inlet, improve the generated power output, increase the economic benefit of power generation, solve the problem of unsafe unit vibration and further promote the sustainable development of a power grid. The inclined water guide opening 311 can supplement water for power generation water in a side direction, further improves the water flow state of the water inlet of the unit, changes the vortex direction, reduces the vortex and reduces the horizontal vibration of the unit. And economic parameter analysis shows that the generating load of the four units is stable at 123MW in the flood season, and the income is increased by 230 million yuan each year. Unit safety analysis: the water can be laterally supplemented by 90m3/s for the water for power generation, and the flow state of the water at the water inlet of the unit is further improved; when the unit is under 30MW load, the horizontal vibration (less than 150 μm) of water conduction is reduced from 160 μm to 140 μm, and the horizontal vibration is reduced to be within a rated value range.
The operation effect is obvious, the economic parameters, the unit vibration and the water flow state all achieve the expected purpose, the operation condition of the hydropower station unit is further improved, the generated output is improved, the safe operation of the unit is ensured, the operation effect is obvious, the economic parameters, the unit vibration and the water flow state all achieve the expected purpose, the generated output is improved, and the safe operation of the unit is ensured.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (2)

1. A hydroelectric power generation guide wall structure is characterized by comprising a guide wall and a power generation dam, wherein the guide wall is arranged at two side parts of the power generation dam, the guide wall comprises an upstream guide wall, a downstream guide wall and a water guide opening, the upstream guide wall and the downstream guide wall are respectively arranged at two side parts of the power generation dam, the water guide port is arranged on the upstream guide wall or the downstream guide wall, the water guide port is arranged above the upstream guide wall or the downstream guide wall, the water guide port comprises an upstream guide wall water guide port and a downstream guide wall water guide port, the upstream guide wall water guide port is communicated with two side parts of the upstream guide wall, the downstream guide wall water guide port is communicated with two side parts of the downstream guide wall, the upstream guide wall water guide port comprises an inclined guide water guide port and a forward guide water guide port, the inclined water guide port and the forward water guide port are both arranged on the upstream guide wall, and the inclined water guide port is arranged on the upstream guide wall close to the power generating dam;
the inclined water guide port is at an angle of 45 degrees;
the length of the inclined water guide nozzle is 6-10 meters, the height of the inclined water guide nozzle is 1-3 meters, the length of the forward water guide nozzle is 15-20 meters, and the height of the forward water guide nozzle is 1-3 meters;
the length of the downstream guide wall water guide port is 15-20 meters, and the height of the downstream guide wall water guide port is 1-3 meters;
the method for dismantling the guide wall of the hydroelectric power generation guide wall structure comprises the following steps:
measuring the existing power generating dam and the existing water guide wall, and designing the dismantling position and size of the water guide wall according to the structure and size of the power generating dam and the water guide wall;
step two, adopting an air pick and a diamond rope to dismantle the upstream guide wall and the downstream guide wall to form an upstream guide wall water guide port and a downstream guide wall water guide port;
and step three, hoisting and carrying the dismantled concrete.
2. The hydroelectric power generation guide wall structure according to claim 1, wherein the number of the inclined water guide ports is two, and the two inclined water guide ports are arranged in parallel.
CN201711164457.6A 2017-11-21 2017-11-21 Hydroelectric power generation guide wall structure and guide wall dismantling method Active CN107740387B (en)

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Application Number Priority Date Filing Date Title
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CN107740387B true CN107740387B (en) 2020-05-12

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Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498188A (en) * 1937-10-04 1939-01-04 English Electric Co Ltd Hydraulic power installations
CN202265809U (en) * 2011-09-22 2012-06-06 中国水电顾问集团西北勘测设计研究院 Water inlet water guide stop log
CN205636673U (en) * 2015-11-20 2016-10-12 交通运输部天津水运工程科学研究所 A sluicing core wall for between hydro junction factory dam
CN205636632U (en) * 2016-04-08 2016-10-12 三峡大学 Wall is led to bank formula spillway inlet channel
CN107178078B (en) * 2017-05-19 2019-07-19 中铁四局集团第二工程有限公司 Change to half intercept form block wall construction method of section in subway station

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