CN116104057A - Tail water accident door device of pumped storage power station and using method thereof - Google Patents
Tail water accident door device of pumped storage power station and using method thereof Download PDFInfo
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- CN116104057A CN116104057A CN202310230946.6A CN202310230946A CN116104057A CN 116104057 A CN116104057 A CN 116104057A CN 202310230946 A CN202310230946 A CN 202310230946A CN 116104057 A CN116104057 A CN 116104057A
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- steel lining
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/06—Pressure galleries or pressure conduits; Galleries specially adapted to house pressure conduits; Means specially adapted for use therewith, e.g. housings, valves, gates
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
- E02B9/022—Closures
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
The invention provides a tail water accident gate device of a pumped storage power station and a use method thereof, wherein the device comprises a steel lining flow channel, a lower cavity and an upper cavity, the steel lining flow channel comprises an upstream steel lining flow channel, a middle steel lining flow channel and a downstream steel lining flow channel, the upper cavity, the lower cavity and the middle steel lining flow channel are arranged from top to bottom, the middle steel lining flow channel is provided with a gate slot for the tail water accident gate to slide up and down, and the tail water accident gate is suspended in the upper cavity by a hoist when a unit operates; the lower cavity is internally provided with a partition door and a crank arm connected with the partition door, the power device drives the crank arm to enable the partition door to rotate around the shaft, and the partition door is changed between a horizontal state and a vertical state in the rotating process so as to realize the partition or the communication of the upper cavity and the lower cavity. The invention can solve the problems of large underground cavity size excavation, large vibration of the gate and the hoist, complicated operation and maintenance, shutdown of the tail water accident gate overhaul opportunity group and the like in the prior art.
Description
Technical Field
The invention belongs to the field of water conservancy and hydropower engineering, and particularly relates to a tail water accident gate device of a pumped storage power station and a use method thereof.
Background
The tail water tunnel of the pumped storage power station is provided with an accident gate behind the elbow-shaped pipe section of each unit. The accident gate has the main functions of: under normal conditions, the still water is closed, the flow channel between the tail water and the unit is cut off, the unit or related pipelines are overhauled, when the auxiliary water pipe or the tail water taper pipe of the unit breaks and other faults, the water is closed and the tail water flow channel is cut off, and the door can be closed rapidly under emergency conditions.
The tail water accident gate is arranged in the tunnel, the height of the operation platform is lower than the water level of the upstream and downstream libraries, so that the cavity is sealed by arranging the valve cover at the top of the cavity above the orifice, the situation that the water body of the runner floods the platform from the orifice is ensured, and the valve cover is connected with the cavity by bolts. The gate adopts hydraulic hoist operation, and hydraulic hoist installs at the valve gap top, and the valve gap top is provided with the round hole that hydraulic hoist piston rod passed, and the piston rod tip sets up the furred flow, and gate and headstock hoist furred flow adopt the round pin hub connection, and during the unit operation, the gate is held by the headstock gear and is suspended in the cavity of drill way top. When the unit operates, the flow velocity of the water body of the flow channel is large, fluctuation exists, the gate and the hoist are caused to vibrate, and the connecting pin shaft between the gate and the hoist hanging head is easily broken, or the hoist is damaged, so that accidents are caused.
To avoid the occurrence of the above-mentioned accidents, conventional design methods are: when the gate is suspended above the orifice, the bottom edge of the gate is at a certain distance from the orifice (overflow surface), so that the vibration of the gate and the hoist is reduced; and the gate is connected with the hoist hanging head by adding a section of hanging rod, namely, the gate is connected with the hanging rod through a pin shaft, and the hanging rod is connected with the hoist hanging head through a pin shaft, so that the connection rigidity of the gate and the hoist hanging head is reduced, and the influence of vibration on the connection position is reduced. However, this approach has the following drawbacks: (1) The bottom edge of the gate is at a certain distance from the orifice, a hanging rod is added between the gate and a hoist hanging head, the height of the cavity is increased, and the size of the underground cavity is increased; (2) After the boom is added, the lift of the hoist is increased, and the size of the underground cavity is also increased; (3) After the boom is added, the workload of installing and detaching the gate and the hoist crane boom is increased; (4) The distance between the bottom edge of the gate and the orifice can only be qualitatively determined, the distance is small, the vibration is large, the distance is large, the vibration is small, and how to determine the distance is verified by a hydraulic test; (5) When the tail water accident door is overhauled, the power station unit needs to be stopped.
Disclosure of Invention
The invention aims to provide a tail water accident gate device of a pumped storage power station and a use method thereof, which can solve the problems of large underground cavity size excavation, large vibration of a gate and a hoist, complicated operation and maintenance, shutdown of a tail water accident gate overhaul time group and the like in the prior art.
The invention adopts the following technical scheme for solving the technical problems:
the tail water accident gate device of the pumped storage power station comprises a steel lining runner, a lower cavity and an upper cavity, wherein the steel lining runner comprises an upstream steel lining runner, a middle steel lining runner and a downstream steel lining runner, the upper cavity, the lower cavity and the middle steel lining runner are arranged from top to bottom, the middle steel lining runner is provided with a gate slot for the tail water accident gate to slide up and down, and the tail water accident gate is held by a hoist to be suspended in the upper cavity during the operation of the unit; the method is characterized in that: the lower cavity is internally provided with a partition door and a crank arm connected with the partition door, the power device drives the crank arm to enable the partition door to rotate around the shaft, and the partition door is changed between a horizontal state and a vertical state in the rotating process so as to realize the partition or the communication of the upper cavity and the lower cavity.
Further, the lower cavity is a steel lining and is welded with the middle steel lining runner, and the upper cavity is a steel lining and is welded with the lower cavity.
Further, the bottom of the upper cavity is welded with a supporting block, the partition door is provided with a seal, the seal of the partition door is contacted with the supporting block when the partition door is in a horizontal state for retaining water, and the supporting block is used as a support for the partition door for retaining water.
Further, a valve cover connected with a bolt is arranged above the upper cavity, the hydraulic hoist is connected with the valve cover through a bolt, a hanging head is arranged at the end part of a piston rod of the hydraulic hoist, a round hole for the piston rod of the hydraulic hoist to pass through is formed in the top of the valve cover, and a lifting lug of the tail water accident door is connected with the hanging head of the hydraulic hoist through a pin shaft.
Further, the crank arm is Z-shaped and consists of a bracket, a shaft and a power arm, the side surface of the lower cavity is provided with a round hole and is provided with a shaft sleeve, the shaft penetrates through the shaft sleeve, one end of the shaft sleeve is the inner side of the lower cavity, the other end of the shaft sleeve is the outer side of the lower cavity, the outer side of the shaft sleeve is connected with the operating room, the shaft can rotate along the shaft sleeve, water stopping is arranged between the shaft and the shaft sleeve, one end of the bracket is connected with the partition door through a bolt, one end of the bracket is connected with the shaft through a bolt, and the other end of the shaft is connected with the power arm through a clamping groove.
Further, the included angle between the bracket and the shaft is 90 degrees, the included angle between the shaft and the power arm is 135 degrees, no relative movement exists among the bracket, the shaft and the power arm, and the power arm is connected with a power device for driving the shaft to rotate.
Further, the device also comprises a water filling device and a drainage device, wherein the water filling device comprises a water filling valve and a water filling pipe, one end of the water filling pipe is connected with the side surface of the valve cover, and the other end of the water filling pipe is connected with a downstream steel lining runner; the drainage device comprises a drainage valve and a drainage pipe, one end of the drainage pipe is connected with the bottom of the cavity at the upper part, and the other end of the drainage pipe is connected with drainage equipment in the operation room.
Further, the upper cavity ventilation device is arranged at the top of the valve cover and comprises an upper cavity air valve and an upper cavity ventilation pipe, the valve cover is provided with an opening, and the upper cavity ventilation pipe is welded at the opening and is connected with the upper cavity; when the upper cavity is filled with water, an air valve of the upper cavity discharges air in the upper cavity; when the upper cavity is drained, the upper cavity air valve supplements air for the upper cavity.
The steel lining runner ventilation device comprises a steel lining runner air valve and a steel lining runner ventilation pipe, an opening is formed in the upstream steel lining runner, and the steel lining runner ventilation pipe is welded at the opening and is connected with the upstream steel lining runner; when the upstream steel lining runner is filled with water, an air valve of the steel lining runner discharges air in the upstream steel lining runner; when the upstream steel lining runner drains water, the air valve of the steel lining runner supplements air for the upstream steel lining runner.
The application method of the tail water accident door device of the pumped storage power station comprises the following steps:
according to the operation characteristics of the tail water accident door of the power station, three states are defined:
state (one): the power station unit normally operates: the power station unit normally operates, the tail water accident door is suspended in an upper cavity by a hydraulic hoist, a flat pressure valve is closed, a water filling valve is opened, a drain valve is closed, the upper cavity is communicated with a downstream steel lining runner by the water filling valve, the upper cavity and the lower cavity are filled with water, the upper surface and the lower surface of the partition door are flatly pressed, the partition door is in a horizontal state under the driving of a crank arm, the partition door separates the upper cavity from the lower cavity, but the partition door is sealed to be in a free state, and the water can flow from a gap between the partition door and the bottom of the upper cavity;
state (two): and (3) stopping and overhauling the power station unit: the power station unit is stopped for maintenance, the tail water accident door is in a fully closed position, the tail water accident door bears the water pressure of a downstream steel lining flow channel, the flat pressure valve is closed, the water filling valve is opened, the drain valve is closed, the upper surface and the lower surface of the partition door are flat-pressed, the partition door is in a vertical state under the driving of the crank arm, the upper cavity is communicated with the downstream steel lining flow channel, bears the water pressure, and the upstream steel lining flow channel is anhydrous;
state (three): the power station unit normally operates, and a tail water accident door is overhauled: the power station unit normally operates, a tail water accident door is suspended in an upper cavity by a hydraulic hoist to be overhauled, or the tail water accident door is lifted out of the cavity to be overhauled on an operation platform, a flat pressure valve is closed, a water filling valve is closed, a drain valve is opened, water does not exist in the upper cavity, the lower surface of the partition door is attached to a supporting block at the bottom of the upper cavity under the action of water pressure jacking of a steel lining runner, and the partition door is sealed in a compressed state to completely partition the upper cavity from the lower cavity;
when the tail water accident door needs to be closed from the full open position, namely, the state (I) is changed into the state (II), the following steps are adopted:
(1.1) driving the crank arm to rotate anticlockwise, and slowly opening the partition door under the driving of the crank arm until the partition door is in a vertical state;
the hydraulic hoist drives the tail water accident gate to descend, the tail water accident gate is slowly closed, the tail water accident gate cuts off the water body of the downstream steel lining runner, the ventilation device of the steel lining runner supplements air for the upstream steel lining runner in the process, the closing process of the tail water accident gate is finished, the tail water accident gate bears the water pressure of the downstream steel lining runner, and the steel lining and a unit on the upstream of the tail water accident gate can be overhauled;
when the tail water accident door needs to be opened from the full closing position, namely, the state (II) is changed into the state (I), the following steps are adopted:
(2.1) opening a flat pressure valve, enabling water to enter an upstream steel lining runner from a downstream steel lining runner through the flat pressure valve, enabling the upstream steel lining runner to be full of water, enabling the upstream steel lining runner to be communicated with the downstream steel lining runner, enabling a tail water accident gate to be flat-pressed back and forth, then closing the flat pressure valve, and exhausting the upstream steel lining runner by a steel lining runner ventilation device in the process;
(2.2) the hydraulic hoist drives the tail water accident gate to ascend, and when the tail water accident gate enters the upper cavity, the water in the upper cavity is discharged to the steel lining runner under the action of dead weight;
(2.3) after the bottom edge of the tail water accident door completely enters the upper cavity, driving the crank arm to rotate clockwise, and slowly closing the partition door under the driving of the crank arm until the partition door is in a horizontal state, wherein the partition door separates the upper cavity from the lower cavity, the upper and lower steel lining runners are communicated with each other, and the door opening process of the tail water accident door is finished;
when the tail water accident door needs to be overhauled, namely, the state (I) is changed into the state (III), the following steps are adopted:
(3.1) closing a water filling valve, wherein the upper cavity is full of water, the water in the upper cavity is disconnected from the water in the steel lining flow channel, a water draining valve is opened, the water in the upper cavity is pressureless, the lower surface of the partition door is attached to a supporting block at the bottom of the upper cavity under the action of water pressure jacking of the steel lining flow channel, the partition door is sealed and in a compressed state, the upper cavity is completely separated from the lower cavity, the water in the upper cavity is slowly drained along a water draining pipe, the upper cavity is drained, and in the process, an upper cavity ventilation device supplements the air for the upper cavity, and in-situ maintenance or lifting maintenance can be carried out on a tail water accident door;
and (3.2) after the overhaul is finished, closing the drain valve, opening the water filling valve, filling the water body into the upper cavity, and exhausting the upper cavity by the upper cavity ventilation device in the process to enter the state (I).
The invention has the following beneficial effects:
(1) The steel lining runner water body and the water body in the upper cavity are separated by the partition door, when the steel lining runner flows through, the tail water accident door is not influenced by the flow rate and fluctuation of the steel lining runner water body, and the working environment of the tail water accident door and the hydraulic hoist is stable;
(2) Because the tail water accident door is not influenced by the flow velocity and fluctuation of the water body of the steel lining flow channel ， The tail water accident door can be directly connected with the hydraulic hoist crane head, a suspender is not required to be added between the crane head and the door body, the hydraulic hoist crane, the valve cover, the tail water accident door and the like are convenient to install and detach, and the excavation size of a cavity can be reduced;
(3) The steel lining runner water body and the upper cavity body are separated by the partition door, the upper cavity body can be emptied, and the tail water accident door can be overhauled and maintained during the running of the unit without influencing the normal running of the unit.
Drawings
FIG. 1 is a schematic diagram of the structure of the power station tail water accident gate in the full open overcurrent condition;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is section I-I of FIG. 1;
FIG. 4 is an enlarged view of portion B of FIG. 1;
FIG. 5 is a schematic diagram of the structure of the power station tail water accident gate in the fully closed position;
fig. 6 is an enlarged view of a portion C in fig. 5.
In the figure: 1-steel lining runner, 1.1-upstream steel lining runner, 1.2-middle steel lining runner, 1.3-downstream steel lining runner, 2-hydraulic hoist, 2.1-piston rod, 2.2-hoist, 3-tail water accident gate, 4-valve cover, 5-upper cavity, 5.1-supporting block, 6-lower cavity, 7-water filling device, 7.1-water filling valve, 7.2-water filling pipe, 8-water draining device, 8.1-water draining valve, 8.2-water draining pipe, 9-partition gate, 9.1-seal, 10-crank arm, 10.1-bracket, 10.2-shaft, 10.3-power arm, 11-upper cavity ventilation device, 11.1-upper cavity air valve, 11.2-upper cavity ventilation pipe, 12-flat pressure device, 12.1-flat pressure valve, 12.2-flat pressure pipe, 13-steel lining runner device, 13.1-steel lining ventilation pipe, 13.2-steel lining ventilation pipe, 14-steel runner.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, an embodiment of the present invention provides a tail water accident gate device of a pumped storage power station, which includes a hydraulic hoist 2, a tail water accident gate 3, a valve cover 4, an upper cavity 5, a lower cavity 6, a water filling device 7, a water draining device 8, a partition gate 9, a crank arm 10, an upper cavity ventilation device 11, a flat pressing device 12, a steel lining runner ventilation device 13, and an operation chamber 14.
The steel lining runner 1 comprises an upstream steel lining runner 1.1, a middle steel lining runner 1.2 and a downstream steel lining runner 1.3, wherein the middle steel lining runner 1.2 is provided with a gate slot, and the tail water accident gate 3 can slide up and down in the gate slot to realize the opening and closing functions. The lower cavity 6 is arranged above the middle steel lining runner 1.2, and the lower cavity 6 is a steel lining and is welded with the middle steel lining runner 1.2.
The upper cavity 5 is arranged above the lower cavity 6, the upper cavity 5 is a steel lining and is welded with the lower cavity 6, and the bottom of the upper cavity 5 is welded with the supporting block 5.1. When the partition door 9 blocks water, the partition door seal 9.1 contacts with the supporting block 5.1, and the supporting block 5.1 serves as a support for the partition door 9 to block water. The steel lining runner 1, the lower cavity 6 and the upper cavity 5 are buried in concrete. The valve cover 4 is arranged above the upper cavity 5, the valve cover 4 is connected with the upper cavity 5 through bolts, and the valve cover 4 can be removed when the tail water accident door 3 is installed and overhauled. The hydraulic hoist 2 is arranged above the valve cover 4, and the hydraulic hoist 2 is connected with the valve cover 4 through bolts, so that the hydraulic hoist 2 is convenient to install and detach. The end part of a piston rod 2.1 of the hydraulic hoist 2 is provided with a hanging head 2.2, the top of a valve cover 4 is provided with a round hole for the piston rod 2.1 of the hydraulic hoist 2 to pass through, a lifting lug of a tail water accident door 3 is connected with the hanging head 2.2 of the hydraulic hoist 2 by a pin shaft, and when a unit operates, the tail water accident door 3 is held by the hoist 2 and suspended in an upper cavity 5.
A partition door 9 and a lever 10 are arranged in the lower chamber 6. The partition door 9 is provided with a seal 9.1, and the crank arm 10 is Z-shaped and consists of a bracket 10.1, a shaft 10.2 and a power arm 10.3. The round hole is offered to lower cavity 6 side and the axle sleeve is installed to the axle 10.2, and the one end of axle sleeve is the inboard of lower cavity 6, and the other end is the outside of lower cavity 6, and the outside links to each other with operating room 14, and axle 10.2 can follow the axle sleeve and rotate, sets up the stagnant water between axle 10.2 and the axle sleeve, prevents that the water body from entering operating room 14 in the lower cavity 6. One end of the bracket 10.1 is connected with the partition door 9 through a bolt, the other end of the bracket 10.1 is connected with the shaft 10.2 through a bolt, the other end of the shaft 10.1 is connected with the power arm 10.3 through a clamping groove, an included angle between the bracket 10.1 and the shaft 10.2 is 90 degrees, an included angle between the shaft 10.2 and the power arm 10.3 is 135 degrees, no relative motion exists between the bracket 10.1, the shaft 10.2 and the power arm 10.3, the power device is connected to the power arm 10.3 to drive the shaft 10.2 to rotate, so that the partition door 9 is driven to rotate, and an included angle between the shaft 10.2 and the power arm 10.3 is 135 degrees, so that the power arm 10.3 has a proper force arm relative to the shaft 10.2 in the rotating process.
According to the operation characteristics of the tail water accident door of the power station, the following three states are defined:
in the first state, the power station unit normally operates, the upper surface and the lower surface of the partition door 9 are flatly pressed, the partition door 9 is in a horizontal state under the drive of the crank arm 10, the partition door 9 separates the upper cavity 5 from the lower cavity 6, but the partition door seal 9.1 is in a free state, and water can flow from a gap between the partition door 9 and the bottom of the upper cavity 5.
And in the second state, the power station unit is stopped for maintenance, the upper surface and the lower surface of the partition door 9 are flatly pressed, and the partition door 9 is in a vertical state (opening state) under the drive of the crank arm 10.
And in the state (III), the power station unit normally operates, the tail water accident door 3 is overhauled, the lower surface of the partition door 9 is attached to the supporting block 5.1 at the bottom of the upper cavity 5 under the water pressure jacking action of the steel lining flow channel 1, and the partition door seal 9.1 is in a compressed state to completely partition the upper cavity 5 from the lower cavity 6.
The water filling device 7 comprises a water filling valve 7.1 and a water filling pipe 7.2, one end of the water filling pipe 7.2 is connected with the side face of the valve cover 4, and the other end is connected with the downstream steel lining flow channel 1.3. The drainage device 8 comprises a drainage valve 8.1 and a drainage pipe 8.2, one end of the drainage pipe 8.2 is connected with the bottom of the upper cavity 5, and the other end is connected with drainage equipment in the operation chamber 14. The state (I) power station unit normally operates and the state (II) power station unit stops for maintenance, the water filling valve 7.1 is opened, the water draining valve 8.1 is closed, and the water filling valve 7.1 and the water draining valve 8.1 do not need to be operated from the state (I) to the state (II) or from the state (II) to the state (I). And in the state (III), the power station unit normally operates, the tail water accident door 3 is overhauled, the water filling valve is closed 7.1, and the drain valve 8.1 is opened. The water filling valve 7.1 is closed from the state (one) to the state (three), the water draining valve 8.1 is opened, the water filling valve 7.1 is opened from the state (three) to the state (one), and the water draining valve 8.1 is closed.
The upper cavity breather 11 comprises an upper cavity air valve 11.1 and an upper cavity breather pipe 11.2, which are mounted on top of the valve cover 4. The valve cover 4 is provided with an opening, and the upper cavity breather pipe 11.2 is welded at the opening and connected with the upper cavity 5. When the upper cavity 5 is filled with water, the air in the upper cavity is discharged by the upper cavity air valve 11.1, so that adverse effects such as air resistance, cavitation and the like are prevented; when the upper cavity drains, the upper cavity air valve 11.1 supplements air for the upper cavity 5, and prevents the upper cavity 5 from generating negative pressure. When exhausting and supplementing air, the air valve of the upper cavity automatically works.
The flat pressing device 12 comprises a flat pressing valve 12.1 and a flat pressing pipe 12.2, one end of the flat pressing pipe 12.2 is connected with the downstream steel lining flow passage 1.3, and the other end is connected with the upstream steel lining flow passage 1.1. The state (one) power station unit normally operates, and the flat valve 12.1 is closed. And (3) stopping and overhauling the power station unit in the second state, and closing the flat valve 12.1. And (3) the power station unit in the state (III) normally operates, the tail water accident gate 3 is overhauled, and the flat pressure valve 12.1 is closed. From the state (II) to the state (I), firstly, the flat pressure valve 12.1 is opened, water enters the upstream steel lining flow channel 1.1 from the downstream steel lining flow channel 1.3 through the flat pressure valve, and when the upstream steel lining flow channel 1.1 is full of water, the upstream steel lining flow channel and the downstream steel lining flow channel are communicated, and the tail water accident gate 3 is flat pressed back and forth. The hydraulic hoist 2 drives the tail water accident door 3 to ascend, and when the tail water accident door 3 enters the upper cavity 5, water in the upper cavity 5 is discharged under the action of dead weight. The flat valve 12.1 is finally closed.
The steel lining runner breather device 13 comprises a steel lining runner air valve 13.1 and a steel lining runner breather pipe 13.2. An opening is formed in the upstream steel lining runner 1.1, and a steel lining runner vent pipe 13.2 is welded at the opening and is connected with the upstream steel lining runner 1.1. When the upstream steel lining runner 1.1 is filled with water, the air valve 13.1 of the steel lining runner discharges air in the upstream steel lining runner 1.1 to prevent adverse effects such as air resistance, cavitation and the like; when the upstream steel lining runner 1.1 drains, the steel lining runner air valve 13.1 supplements air for the upstream steel lining runner 1.1, so that negative pressure of the upstream steel lining runner 1.1 is prevented. When exhausting and supplementing air, the air valve of the steel lining runner automatically works.
The embodiment of the invention also provides a using method of the tail water accident door device of the pumped storage power station, which specifically comprises the following steps:
when the tail water accident gate needs to be closed from the fully open position, namely, from the state (one) (shown in fig. 1) to the state (two) (shown in fig. 5), the following steps are taken:
the first step: opening the partition door 9
The crank arm 10 is driven to rotate anticlockwise, the partition door 9 is slowly opened under the drive of the crank arm until the partition door 9 is in a vertical state (opening state), and the driving force of the crank arm 10 is not large because the upper surface and the lower surface of the partition door 9 are flatly pressed;
and a second step of: closing the tail water accident door 3
The hydraulic hoist 2 drives the tail water accident door 3 to descend, the tail water accident door 3 is slowly closed, the tail water accident door 3 cuts off the water body of the downstream steel lining flow channel 1.3, the steel lining flow channel ventilation device 13 supplements air for the upstream steel lining flow channel in the process, the closing process of the tail water accident door 3 is finished, and the tail water accident door 3 bears the water pressure of the downstream steel lining flow channel 1.3. The steel lining 1.1, the unit and the like at the upstream of the tail water accident gate 3 can be overhauled.
When the tail water accident gate 3 needs to be opened from the fully closed position, namely, from the state (two) (shown in fig. 5) to the state (one) (shown in fig. 1), the following steps are taken:
the first step: upstream steel lining runner 1.1 is filled with water and pressed flatly
Opening a flat pressure valve 12.1, enabling water to enter an upstream steel lining runner 1.1 from a downstream steel lining runner 1.3 through the flat pressure valve 12.1, enabling the upstream steel lining runner 1.1 to be full of water, enabling the upstream steel lining runner and the downstream steel lining runner to be communicated, enabling a tail water accident gate 3 to be flat-pressed back and forth, closing the flat pressure valve 12.1, and exhausting the upstream steel lining runner by a steel lining runner ventilating device 13 in the process;
and a second step of: opening tail water accident door 3
The hydraulic hoist 2 drives the tail water accident gate 3 to ascend, and when the tail water accident gate 3 enters the upper cavity 5, the water in the upper cavity 5 is discharged to the steel lining runner 1 under the action of dead weight;
and a third step of: closing the partition door 9
When the bottom edge of the tail water accident door 3 completely enters the upper cavity 5, the crank arm 10 is driven to rotate clockwise, the partition door 9 is slowly closed under the drive of the crank arm 10 until the partition door 9 is in a horizontal state, and the partition door 9 separates the upper cavity 5 from the lower cavity 6. And the water bodies of the upstream steel lining flow channel and the downstream steel lining flow channel are communicated, and the tail water accident door 3 is opened.
When the tail water accident door 3 needs to be overhauled, namely, the state (one) is changed into the state (three), the following steps are adopted:
the first step: evacuating the upper cavity 5 water
Closing a water filling valve 7.1, wherein the upper cavity 5 is filled with water, the water in the upper cavity is disconnected from the water in the steel lining flow channel, a water draining valve 8.1 is opened, the water in the upper cavity is pressureless water, the lower surface of a partition door 9 is attached to a support block 5.1 at the bottom of the upper cavity under the action of water pressure jacking of the steel lining flow channel, the partition door seal 9.1 is in a compressed state, the upper cavity 5 is completely isolated from the lower cavity 6, the water in the upper cavity 5 is slowly drained along a water draining pipe, the upper cavity 5 is drained, and an upper cavity ventilation device 11 supplements air for the upper cavity in the process, so that a tail water accident door 3 can be subjected to in-situ maintenance or lifting maintenance;
and a second step of: the upper cavity 5 is filled with water
After the overhaul is completed, the drain valve 8.1 is closed, the water filling valve 7.1 is opened, the upper cavity 5 is filled with water, and in the process, the upper cavity ventilation device 11 is used for exhausting air to the upper cavity, and the state (I) is entered.
The foregoing is merely illustrative embodiments of the present invention, and the present invention is not limited thereto, and any changes or substitutions that may be easily contemplated by those skilled in the art within the scope of the present invention should be included in the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.
Claims (10)
1. The tail water accident gate device of the pumped storage power station comprises a steel lining runner, a lower cavity and an upper cavity, wherein the steel lining runner comprises an upstream steel lining runner, a middle steel lining runner and a downstream steel lining runner, the upper cavity, the lower cavity and the middle steel lining runner are arranged from top to bottom, the middle steel lining runner is provided with a gate slot for the tail water accident gate to slide up and down, and the tail water accident gate is held by a hoist to be suspended in the upper cavity during the operation of the unit; the method is characterized in that: the lower cavity is internally provided with a partition door and a crank arm connected with the partition door, the power device drives the crank arm to enable the partition door to rotate around the shaft, and the partition door is changed between a horizontal state and a vertical state in the rotating process so as to realize the partition or the communication of the upper cavity and the lower cavity.
2. The pumped-storage power station tail water accident gate apparatus of claim 1, wherein: the lower cavity is a steel lining and is welded with the middle steel lining runner, and the upper cavity is a steel lining and is welded with the lower cavity.
3. The pumped-storage power station tail water accident gate apparatus of claim 1, wherein: the bottom of the upper cavity is welded with a supporting block, the partition door is provided with a seal, the seal of the partition door is contacted with the supporting block when the partition door is in a horizontal state for retaining water, and the supporting block is used as a support for the partition door when the partition door is in a water retaining state.
4. The pumped-storage power station tail water accident gate apparatus of claim 1, wherein: the hydraulic hoist is connected with the valve cover through bolts, the end part of a piston rod of the hydraulic hoist is provided with a hanging head, the top of the valve cover is provided with a round hole for the piston rod of the hydraulic hoist to pass through, and a lifting lug of the tail water accident door is connected with the hanging head of the hydraulic hoist through a pin shaft.
5. The pumped-storage power station tail water accident gate apparatus of claim 1, wherein: the crank arm is Z-shaped and consists of a bracket, a shaft and a power arm, the side surface of the lower cavity is provided with a round hole and is provided with a shaft sleeve, one end of the shaft sleeve penetrates through the shaft sleeve, the other end of the shaft sleeve is the inner side of the lower cavity, the outer side of the lower cavity is connected with the operating room, the shaft can rotate along the shaft sleeve, water stopping is arranged between the shaft and the shaft sleeve, one end of the bracket is connected with the partition door through a bolt, one end of the bracket is connected with the shaft through a bolt, and the other end of the shaft is connected with the power arm through a clamping groove.
6. The pumped storage power station tail water accident gate apparatus of claim 5, wherein: the included angle between the bracket and the shaft is 90 degrees, the included angle between the shaft and the power arm is 135 degrees, no relative movement exists among the bracket, the shaft and the power arm, and the power arm is connected with a power device for driving the shaft to rotate.
7. The pumped-storage power station tail water accident gate apparatus of claim 4, wherein: the water filling device comprises a water filling valve and a water filling pipe, one end of the water filling pipe is connected with the side face of the valve cover, and the other end of the water filling pipe is connected with a downstream steel lining runner; the drainage device comprises a drainage valve and a drainage pipe, one end of the drainage pipe is connected with the bottom of the cavity at the upper part, and the other end of the drainage pipe is connected with drainage equipment in the operation room.
8. The pumped-storage power station tail water accident gate apparatus of claim 4, wherein: the upper cavity ventilation device comprises an upper cavity air valve and an upper cavity ventilation pipe, the upper cavity ventilation pipe is provided with an opening on the valve cover, and the upper cavity ventilation pipe is welded at the opening and connected with the upper cavity; when the upper cavity is filled with water, an air valve of the upper cavity discharges air in the upper cavity; when the upper cavity is drained, the upper cavity air valve supplements air for the upper cavity.
9. The pumped-storage power station tail water accident gate apparatus of claim 1, wherein: the steel lining runner ventilation device comprises a steel lining runner air valve and a steel lining runner ventilation pipe, an opening is formed in the upstream steel lining runner, and the steel lining runner ventilation pipe is welded at the opening and is connected with the upstream steel lining runner; when the upstream steel lining runner is filled with water, an air valve of the steel lining runner discharges air in the upstream steel lining runner; when the upstream steel lining runner drains water, the air valve of the steel lining runner supplements air for the upstream steel lining runner.
10. A method of using a pumped storage power station tail water accident gate apparatus as claimed in any one of claims 1 to 9, wherein: comprising
According to the operation characteristics of the tail water accident door of the power station, three states are defined:
state (one): the power station unit normally operates: the power station unit normally operates, the tail water accident door is suspended in an upper cavity by a hydraulic hoist, a flat pressure valve is closed, a water filling valve is opened, a drain valve is closed, the upper cavity is communicated with a downstream steel lining runner by the water filling valve, the upper cavity and the lower cavity are filled with water, the upper surface and the lower surface of the partition door are flatly pressed, the partition door is in a horizontal state under the driving of a crank arm, the partition door separates the upper cavity from the lower cavity, but the partition door is sealed to be in a free state, and the water can flow from a gap between the partition door and the bottom of the upper cavity;
state (two): and (3) stopping and overhauling the power station unit: the power station unit is stopped for maintenance, the tail water accident door is in a fully closed position, the tail water accident door bears the water pressure of a downstream steel lining flow channel, the flat pressure valve is closed, the water filling valve is opened, the drain valve is closed, the upper surface and the lower surface of the partition door are flat-pressed, the partition door is in a vertical state under the driving of the crank arm, the upper cavity is communicated with the downstream steel lining flow channel, bears the water pressure, and the upstream steel lining flow channel is anhydrous;
state (three): the power station unit normally operates, and a tail water accident door is overhauled: the power station unit normally operates, a tail water accident door is suspended in an upper cavity by a hydraulic hoist to be overhauled, or the tail water accident door is lifted out of the cavity to be overhauled on an operation platform, a flat pressure valve is closed, a water filling valve is closed, a drain valve is opened, water does not exist in the upper cavity, the lower surface of the partition door is attached to a supporting block at the bottom of the upper cavity under the action of water pressure jacking of a steel lining runner, and the partition door is sealed in a compressed state to completely partition the upper cavity from the lower cavity;
when the tail water accident door needs to be closed from the full open position, namely, the state (I) is changed into the state (II), the following steps are adopted:
(1.1) driving the crank arm to rotate anticlockwise, and slowly opening the partition door under the driving of the crank arm until the partition door is in a vertical state;
the hydraulic hoist drives the tail water accident gate to descend, the tail water accident gate is slowly closed, the tail water accident gate cuts off the water body of the downstream steel lining runner, the ventilation device of the steel lining runner supplements air for the upstream steel lining runner in the process, the closing process of the tail water accident gate is finished, the tail water accident gate bears the water pressure of the downstream steel lining runner, and the steel lining and a unit on the upstream of the tail water accident gate can be overhauled;
when the tail water accident door needs to be opened from the full closing position, namely, the state (II) is changed into the state (I), the following steps are adopted:
(2.1) opening a flat pressure valve, enabling water to enter an upstream steel lining runner from a downstream steel lining runner through the flat pressure valve, enabling the upstream steel lining runner to be full of water, enabling the upstream steel lining runner to be communicated with the downstream steel lining runner, enabling a tail water accident gate to be flat-pressed back and forth, then closing the flat pressure valve, and exhausting the upstream steel lining runner by a steel lining runner ventilation device in the process;
(2.2) the hydraulic hoist drives the tail water accident gate to ascend, and when the tail water accident gate enters the upper cavity, the water in the upper cavity is discharged to the steel lining runner under the action of dead weight;
(2.3) after the bottom edge of the tail water accident door completely enters the upper cavity, driving the crank arm to rotate clockwise, and slowly closing the partition door under the driving of the crank arm until the partition door is in a horizontal state, wherein the partition door separates the upper cavity from the lower cavity, the upper and lower steel lining runners are communicated with each other, and the door opening process of the tail water accident door is finished;
when the tail water accident door needs to be overhauled, namely, the state (I) is changed into the state (III), the following steps are adopted:
(3.1) closing a water filling valve, wherein the upper cavity is full of water, the water in the upper cavity is disconnected from the water in the steel lining flow channel, a water draining valve is opened, the water in the upper cavity is pressureless, the lower surface of the partition door is attached to a supporting block at the bottom of the upper cavity under the action of water pressure jacking of the steel lining flow channel, the partition door is sealed and in a compressed state, the upper cavity is completely separated from the lower cavity, the water in the upper cavity is slowly drained along a water draining pipe, the upper cavity is drained, and in the process, an upper cavity ventilation device supplements the air for the upper cavity, and in-situ maintenance or lifting maintenance can be carried out on a tail water accident door;
and (3.2) after the overhaul is finished, closing the drain valve, opening the water filling valve, filling the water body into the upper cavity, and exhausting the upper cavity by the upper cavity ventilation device in the process to enter the state (I).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310230946.6A CN116104057B (en) | 2023-03-12 | 2023-03-12 | Tail water accident door device of pumped storage power station and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310230946.6A CN116104057B (en) | 2023-03-12 | 2023-03-12 | Tail water accident door device of pumped storage power station and using method thereof |
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| CN116104057A true CN116104057A (en) | 2023-05-12 |
| CN116104057B CN116104057B (en) | 2023-07-18 |
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| GB151782A (en) * | 1919-08-08 | 1920-10-07 | Glenfield And Kennedy Ltd | Device for facilitating the repair of sluice-gate sills |
| JP3156578U (en) * | 2009-10-23 | 2010-01-07 | 三和メイテック株式会社 | Xiamen Gate |
| CN201473933U (en) * | 2009-09-08 | 2010-05-19 | 中国水电顾问集团北京勘测设计研究院 | Combination layout structure of tail water emergency gate and tail water surge shaft in pumped storage power station |
| CN106836150A (en) * | 2017-03-14 | 2017-06-13 | 唐水深 | One kind bypass suction gate |
| CN110258465A (en) * | 2019-06-26 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Plane gate system |
| CN113062280A (en) * | 2021-03-08 | 2021-07-02 | 长江勘测规划设计研究有限责任公司 | Arc-shaped valve cap door device opened and closed by water power and using method thereof |
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2023
- 2023-03-12 CN CN202310230946.6A patent/CN116104057B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB151782A (en) * | 1919-08-08 | 1920-10-07 | Glenfield And Kennedy Ltd | Device for facilitating the repair of sluice-gate sills |
| CN201473933U (en) * | 2009-09-08 | 2010-05-19 | 中国水电顾问集团北京勘测设计研究院 | Combination layout structure of tail water emergency gate and tail water surge shaft in pumped storage power station |
| JP3156578U (en) * | 2009-10-23 | 2010-01-07 | 三和メイテック株式会社 | Xiamen Gate |
| CN106836150A (en) * | 2017-03-14 | 2017-06-13 | 唐水深 | One kind bypass suction gate |
| CN110258465A (en) * | 2019-06-26 | 2019-09-20 | 中国电建集团成都勘测设计研究院有限公司 | Plane gate system |
| CN113062280A (en) * | 2021-03-08 | 2021-07-02 | 长江勘测规划设计研究有限责任公司 | Arc-shaped valve cap door device opened and closed by water power and using method thereof |
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| Publication number | Publication date |
|---|---|
| CN116104057B (en) | 2023-07-18 |
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