CN109555090B - Ecological flow discharge facility for pumped storage power station and implementation method - Google Patents
Ecological flow discharge facility for pumped storage power station and implementation method Download PDFInfo
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- CN109555090B CN109555090B CN201910037516.6A CN201910037516A CN109555090B CN 109555090 B CN109555090 B CN 109555090B CN 201910037516 A CN201910037516 A CN 201910037516A CN 109555090 B CN109555090 B CN 109555090B
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- 238000000034 method Methods 0.000 title claims abstract description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 247
- 238000007599 discharging Methods 0.000 claims abstract description 63
- 238000007667 floating Methods 0.000 claims abstract description 59
- 238000005086 pumping Methods 0.000 claims abstract description 51
- 238000012806 monitoring device Methods 0.000 claims abstract description 24
- 238000010276 construction Methods 0.000 claims description 14
- 238000011144 upstream manufacturing Methods 0.000 claims description 14
- 239000010813 municipal solid waste Substances 0.000 claims description 12
- 239000000725 suspension Substances 0.000 claims description 9
- 239000013049 sediment Substances 0.000 claims description 8
- 238000009825 accumulation Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 230000000740 bleeding effect Effects 0.000 claims 1
- 238000007689 inspection Methods 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 description 15
- 238000004873 anchoring Methods 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000000903 blocking effect Effects 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 230000007774 longterm Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004297 night vision Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
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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
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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 an ecological flow discharging facility for a pumped storage power station and an implementation method thereof, wherein the ecological flow discharging facility is constructed in a small occupied area, low in investment, combined in a permanent way, convenient to monitor and manage and capable of meeting the downstream ecological flow demand well. The facility comprises a permanent water inlet head, an ecological flow discharge pipe, an automatic flow control valve, an ecological flow monitoring device, a temporary water inlet head and a floating pumping device, wherein the permanent water inlet head is arranged on a slope of a covering layer at the upper part of a tunnel; the upper end of the ecological flow discharge pipe is connected with the permanent water inlet head, and the lower end of the ecological flow discharge pipe passes through the diversion tunnel; the temporary water inlet head extends from the tunnel cofferdam to the lower end of the ecological flow discharge pipe and is connected with the ecological flow discharge pipe; the automatic flow control valve and the ecological flow monitoring device are arranged at one end of the ecological flow discharge pipe, which passes through the diversion tunnel; the floating water pumping device is connected with the permanent water inlet head.
Description
Technical Field
The invention relates to an ecological flow discharge facility for a pumped storage power station and an implementation method thereof, which are suitable for the field of water environment and aquatic ecology protection of the pumped storage power station or other similar hydraulic and hydroelectric engineering.
Background
Reservoir flooding of pumped storage power stations, dam blocking, operation scheduling and the like cause changes in hydrologic conditions downstream of the dam, and the ecological flow is discharged by adopting a certain facility, so that the downstream water habitat is ensured to be maintained. The problem to be solved is to realize the drainage of ecological flow in a feasible and convenient operation mode.
At present, the common mode of discharging the ecological flow of the conventional hydropower station is to set an ecological flow unit on a dam body, set an ecological flow discharge hole, open the discharging ecological flow through a flood discharge gate and the like, but the rain collecting area of the pumped storage power station is quite small, the ecological flow required to be discharged is also small, the investment of the ecological unit and the ecological discharge hole is too large, and the economic benefit is poor, so that the technical problem to be solved is how to realize the discharging of the ecological flow in the initial water storage period and the running period of the pumped storage power station in a simple mode.
Disclosure of Invention
The invention aims to overcome the defects of the conventional hydropower station ecological flow discharging technical scheme in the prior art, and provides an ecological flow discharging facility and an implementation method for a pumped storage power station, wherein the ecological flow discharging facility is constructed in a small occupied area, low in investment, convenient to monitor and manage and capable of meeting the downstream ecological flow requirement well.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention relates to an ecological flow discharge facility for a pumped storage power station, which comprises a tunnel upper cover layer, a diversion tunnel and a tunnel cofferdam, wherein the diversion tunnel is arranged below the tunnel upper cover layer, one side of the tunnel upper cover layer facing a reservoir is a slope, the tunnel cofferdam is arranged on one side of the tunnel upper cover layer, which is provided with the slope, and the ecological flow discharge facility also comprises a permanent water inlet head part, an ecological flow discharge pipe, an automatic flow control valve, an ecological flow monitoring device, a temporary water inlet head part and a floating pumping device, wherein the permanent water inlet head part is arranged on the slope of the tunnel upper cover layer; the upper end of the ecological flow discharge pipe is connected with the permanent water inlet head, and the lower end of the ecological flow discharge pipe passes through the diversion tunnel; the temporary water inlet head extends from the tunnel cofferdam to the lower end of the ecological flow discharge pipe and is connected with the ecological flow discharge pipe; the automatic flow control valve and the ecological flow monitoring device are arranged at one end of the ecological flow discharge pipe, which passes through the diversion tunnel; the floating water pumping device is arranged between the diversion tunnel and the tunnel cofferdam and is connected with the permanent water inlet part.
The flow automatic control valve is used for controlling the corresponding water yield by presetting a required flow value and correspondingly adjusting the opening of the automatic control valve.
The ecological flow monitoring device is characterized in that an outlet end is provided with an on-line monitoring facility and is used for collecting actual downward leakage flow, and the ecological flow monitoring device can be divided into a ecological flow digital monitoring device and an ecological flow video monitoring device which are respectively used for transmitting downward leakage flow real-time monitoring data and video images to a centralized management platform of a power station and a supervision platform of a supervision department.
Preferably, the permanent water inlet head comprises a permanent water inlet, a vertical trash rack and a reverse trapezoid water inlet top cover, wherein the permanent water inlet is vertically arranged on a slope of a covering layer on the upper portion of the tunnel, the vertical trash rack is arranged at the upper end of the permanent water inlet, and the water inlet top cover is arranged at the top end of the vertical trash rack.
Preferably, the top of the permanent water inlet is higher than the maximum sediment accumulation line of the reservoir and lower than the dead water level of the reservoir.
Preferably, a diversion tunnel plug is arranged in the diversion tunnel, and the ecological flow discharge pipe penetrates through the diversion tunnel plug.
Preferably, the ecological flow discharging pipe comprises a slope ecological flow discharging pipe, a vertical ecological flow discharging pipe, an ecological flow discharging pipe plug front section, a plug embedded pipe and an ecological flow discharging pipe plug rear section, wherein the slope ecological flow discharging pipe is arranged along the slope of the upper covering layer of the tunnel, the upper end of the slope ecological flow discharging pipe is connected with a permanent water inlet head, the vertical ecological flow discharging pipe is connected with the lower end of the slope ecological flow discharging pipe and is vertically arranged at one end of the tunnel close to the cofferdam, the plug embedded pipe penetrates through the diversion tunnel plug, the ecological flow discharging pipe plug front section is arranged between the vertical ecological flow discharging pipe and the plug embedded pipe, the ecological flow discharging pipe plug rear section is connected with the plug embedded pipe to be far away from one end of the cofferdam, and the automatic flow control valve and the ecological flow monitoring device are arranged at the tail end of the plug rear section of the ecological flow discharging pipe.
The main body of the front section of the ecological flow discharge pipe plug and the rear section of the ecological flow discharge pipe plug are arranged and arranged by utilizing the cut diversion tunnel, the upstream side of the main body extends into a warehouse and is properly higher than the maximum sediment accumulation line, the main body is not blocked by sediment in the long-term operation process, the buttress is arranged below the discharge pipe in the diversion tunnel to support, the ecological flow discharge pipe is convenient to fix, maintain and replace, the upstream inlet section is provided with the slope buttress on a mountain, and the slope buttress is embedded into a rock body below by an anchor rod and the like, so that the stability of the ecological flow discharge pipe is ensured. The ecological flow discharge pipe plug is characterized in that a temporary drainage interface is arranged at the upstream side end of the front section of the ecological flow discharge pipe plug at the upstream side of a diversion tunnel plug (a hydraulic structure for diversion tunnel plugging), and is used for connecting the temporary drainage pipe into the drainage flow under the temporary drainage interface after the front section of the ecological flow discharge pipe plug, the plug embedded pipe and the rear section of the ecological flow discharge pipe plug are provided with water passing conditions during construction of the diversion tunnel plug.
Preferably, the joint of the plug embedded pipe and the rear section of the plug of the ecological flow discharge pipe is provided with an overhaul valve and a pressure reducing valve.
The device comprises an overhaul valve and a pressure reducing valve, wherein the overhaul valve is arranged on the downstream side of the plug embedded pipe and is used for closing the rear end discharge pipe and monitoring facilities during temporary overhaul; and a pressure reducing valve is arranged behind the overhaul valve and used for reducing the water pressure of the water outlet and reducing the bearing capacity of subsequent equipment.
Preferably, the temporary water inlet head comprises a cofferdam embedded pipe and a temporary water drain pipe, wherein the cofferdam embedded pipe penetrates through the tunnel cofferdam, and the cofferdam embedded pipe is connected with the ecological flow discharge pipe through the temporary water drain pipe.
The temporary drainage pipe is connected with the ecological flow drainage pipe and is used for drainage of the ecological flow in the plugging period (namely in the plug construction period) of the diversion tunnel.
Preferably, the floating pumping device comprises a suspension mechanism, a submersible pump, a pumping hose, a float switch control mechanism, a temporary water storage tank and a water outlet hose, wherein the temporary water storage tank is connected with the submersible pump through the pumping hose, the temporary water storage tank is arranged at a height higher than that of a permanent water inlet head, the water outlet hose is connected with the permanent water inlet head, the float switch control mechanism is arranged in the temporary water storage tank, the float switch control mechanism is electrically connected with the submersible pump, and the submersible pump is provided with the suspension mechanism.
Preferably, the suspension mechanism comprises a pontoon, an anchor rope, an anchor disc and an anchor pulley, wherein the submersible pump is suspended at the bottom of the pontoon, the anchor pulley is arranged on the pontoon, and the anchor rope penetrates through the anchor pulley to be connected with the anchor disc.
Preferably, the float switch control mechanism comprises a float, a float control switch and a water pump cable, wherein the float is suspended in the temporary water storage tank, the float control switch is connected with the float, and the float control switch is connected with the submersible pump through the water pump cable.
In order to meet the requirement that the river under the dam continuously keeps a certain ecological flow during the initial water storage period, when the water storage level is not submerged in a certain height of the permanent water inlet, a floating water pumping device is arranged, so that the water pumping requirement is met, and the water pumping cost in the water storage process can be reduced. The device mainly comprises a submersible pump, a pontoon, a water pumping hose, an anchoring rope, an anchoring pulley and a temporary water storage tank, wherein the submersible pump is hoisted below the pontoon, an iron anchor disc with equivalent dead weight is arranged below the vertical anchoring rope, the iron anchor disc is placed at the bottom of a warehouse to stabilize the pontoon, and the anchoring rope is led to the shore for fixing after passing through the anchoring pulley, so that the device can be overhauled and stably operated; one end of the pumping hose is connected with the outlet of the submersible pump, the other end of the pumping hose is connected to the temporary water storage tank, the temporary water storage tank is connected with the water pump cable and the power supply side through the floating ball liquid level switch and used for controlling the opening and closing of the submersible pump, a temporary water storage tank valve is arranged at a position, which is located below the side face of the temporary water storage tank, the valve of the temporary water storage tank is connected with the water outlet hose, and finally the valve of the temporary water storage tank is connected with the permanent water inlet. When the project needs to drain the large flow, a plurality of temporary water storage tanks with close heights can be connected in series, the bottoms of the water storage tanks are basically leveled, the floating ball liquid level switch is arranged on one temporary water storage tank farthest from the permanent water inlet, and the temporary water storage tanks are connected through water inlets and water outlets arranged at the position of the side face, so that the ecological flow continuously drains in the water storage process.
The invention also provides an ecological flow discharge implementation method for the pumped storage power station, which comprises the following steps:
step 1, constructing a tunnel cofferdam, and embedding a temporary water inlet head during construction; constructing the diversion tunnel plug, and before the diversion tunnel plug is built, conveying water to the diversion tunnel plug through a temporary drain pipe and extending to a downstream river channel;
step 2, after the diversion tunnel plug, the plug embedded pipe and the rear section of the ecological flow discharge pipe plug are built, the temporary drain pipe is connected with the plug embedded pipe, and upstream inflow water is discharged to a downstream river through the plug embedded pipe and the rear section of the ecological flow discharge pipe plug;
step 3, after the construction of the front section of the ecological flow discharging pipe plug is completed, connecting the temporary drain pipe to the front section of the ecological flow discharging pipe plug, and discharging flow through the front section of the ecological flow discharging pipe plug, the plug embedded pipe and the rear section of the ecological flow discharging pipe plug;
and 4, after the diversion tunnel plug is constructed, the cofferdam of the diversion tunnel is removed, the power station starts initial water storage, during the period, water in the reservoir area is pumped to a permanent water inlet through a floating pumping device, and ecological flow is discharged to the downstream through an ecological flow discharge pipe.
According to the technical scheme, a mode of combining a permanent drainage device with a temporary drainage device is adopted, and drainage is carried out through a temporary drainage pipe pre-buried at the bottom of a diversion tunnel cofferdam in the diversion tunnel plugging process; in the process of completing the blocking of the diversion tunnel and starting initial water storage, pumping the water body in the reservoir area into a permanent ecological flow discharge pipe through a floating pumping device to discharge ecological flow; when the water storage level rises and passes through the water inlet of the permanent ecological flow discharge pipe, and the downward discharge flow meets the requirement, the floating pumping device stops operating, and the self-flowing discharge is realized. In the initial water storage and normal operation process of the power station, the drainage flow can be monitored in real time through an ecological flow monitoring facility (comprising a digital monitoring facility and a video monitoring facility) so as to meet the monitoring requirement of downstream ecological water.
Drawings
Fig. 1 is a schematic structural view of an ecological flow bleed facility for a pumped-storage power station of the present invention.
Fig. 2 is a schematic view of a partially enlarged construction of the ecological flow discharge facility for a pumped-storage power station of the present invention.
Fig. 3 is a schematic structural view of the permanent water inlet head of the present invention.
FIG. 4 is a cross-sectional view of a diversion tunnel bulkhead of the present invention.
Fig. 5 is a schematic structural view of the floating pumping device of the present invention.
In the figure: 1, a tunnel upper covering layer; 101, slope; 2 diversion tunnels; 201 diversion tunnel plugs; 3, cofferdam of tunnels; 4, permanently feeding water into the head part; 401 permanent water inlet; 402 vertical trash rack; 403 water inlet top cap; 5 an ecological flow discharge pipe; 501 slope ecological flow discharge pipe; 502 vertical ecological flow discharge pipe; 503 ecological flow discharge pipe plug front section; 504 plugging the embedded pipe; 505 the rear section of the plug of the ecological flow discharge pipe; 506 slope direction buttresses; 507 transverse buttresses; 6 an automatic flow control valve; 701 an ecological flow digital monitoring device; 702 ecological flow video monitoring device; 8, temporarily feeding water into the head; 801 cofferdam embedded pipe; 802 temporary drain pipe; 9, a maintenance valve; 10 a pressure reducing valve; 11 floating pumping device; 1101 submersible pump; 1102 a water pumping hose; 1103 temporary storage tank; 1104 a water outlet hose; 1105 pontoon; 1106 anchoring the rope; 1107 anchor disk; 1108 anchoring a pulley; 1109 floating ball; 1110 a float control switch; 1111 water pump cable; 1112 temporary storage tank valve.
Detailed Description
The invention is further described below with reference to the drawings and detailed description.
As shown in fig. 1 and 2, the ecological flow discharging facility for the pumped storage power station comprises a tunnel upper cover layer 1, a diversion tunnel 2 and a tunnel cofferdam 3, wherein the diversion tunnel 2 is arranged below the tunnel upper cover layer 1, one side of the tunnel upper cover layer 1 facing a reservoir is provided with a slope 101, the tunnel cofferdam 3 is arranged on one side of the tunnel upper cover layer 1 provided with the slope 101, and the ecological flow discharging facility further comprises a permanent water inlet head 4, an ecological flow discharging pipe 5, an automatic flow control valve 6, an ecological flow monitoring device, a temporary water inlet head 8 and a floating pumping device 11, wherein the permanent water inlet head 4 is arranged on the slope 101 of the tunnel upper cover layer 1; the upper end of the ecological flow discharge pipe 5 is connected with the permanent water inlet head 4, and the lower end of the ecological flow discharge pipe 5 passes through the diversion tunnel 2; the temporary water inlet head 8 extends from the tunnel cofferdam 3 to the lower end of the ecological flow discharge pipe 5 and is connected with the ecological flow discharge pipe 5; the automatic flow control valve 6 and the ecological flow monitoring device are arranged at one end of the ecological flow discharge pipe 5 penetrating through the diversion tunnel 2; the floating water pumping device 11 is arranged at a low-lying part of the terrain between the diversion tunnel 2 and the tunnel cofferdam 3, and the floating water pumping device 11 is connected with the permanent water inlet part 4.
As shown in fig. 3, the permanent water inlet head 4 includes a permanent water inlet 401, a vertical trash rack 402 and an inverse trapezoid water inlet top cover 403, the permanent water inlet 401 is vertically arranged on the slope 101 of the upper covering layer 1 of the tunnel, the vertical trash rack 402 is arranged at the upper end of the permanent water inlet 401, and the water inlet top cover 403 is arranged at the top end of the vertical trash rack. The top of the permanent water inlet 401 is higher than the maximum sediment accumulation line of the reservoir and lower than the dead water level of the reservoir.
As shown in fig. 1 and 2, a diversion tunnel plug 201 is disposed in the diversion tunnel 2, and the ecological flow discharge pipe 5 passes through the diversion tunnel plug 201. The ecological flow discharge pipe 5 comprises a slope-direction ecological flow discharge pipe 501, a vertical ecological flow discharge pipe 502, an ecological flow discharge pipe plug front section 503, a plug embedded pipe 504 and an ecological flow discharge pipe plug rear section 505, the slope-direction ecological flow discharge pipe 501 is arranged along the slope 101 of the upper cover layer 1 of the tunnel through a slope-direction buttress 506, the upper end of the slope-direction ecological flow discharge pipe 501 is connected with a permanent water inlet head 4, the vertical ecological flow discharge pipe 502 is connected with the lower end of the slope-direction ecological flow discharge pipe 501 and is vertically arranged at one end, close to the cofferdam 3, of the diversion tunnel 2, the plug embedded pipe 504 passes through the diversion tunnel plug 201, the ecological flow discharge pipe plug front section 503 is arranged between the vertical ecological flow discharge pipe 502 and the plug embedded pipe 504, the ecological flow discharge pipe plug rear section 505 is connected with one end, far away from the plug embedded pipe 504, and the automatic flow control valve 6 and the ecological flow monitoring device are arranged at the tail end of the ecological flow discharge pipe plug rear section 505. The front section 503 of the ecological flow discharge pipe plug and the rear section 505 of the ecological flow discharge pipe plug are both arranged at the bottom of the diversion tunnel 2 through the transverse buttress 507.
The main body of the ecological flow discharge pipe 5 plug front section ecological flow discharge pipe plug rear section 505 is laid and arranged by utilizing the cut diversion tunnel 2, the upstream side extends into a warehouse and is properly higher than the maximum sediment accumulation line, the situation that sediment is not blocked in the long-term operation process is ensured, the buttress is arranged below the discharge pipe in the diversion tunnel 2 to support, the ecological flow discharge pipe 5 is convenient to fix, maintain and replace, the upstream inlet section is provided with the slope buttress 506 on a mountain, and the slope buttress 506 is embedded into a rock body below by an anchor rod and the like, so that the ecological flow discharge pipe 5 is ensured to be stable. The upstream side end of the front section 503 of the ecological flow discharge pipe plug on the upstream side of the diversion tunnel plug 201 (a hydraulic structure for plugging the diversion tunnel 2) is provided with a temporary drainage interface, which is used for connecting the temporary drainage pipe 802 into the temporary drainage interface to drain flow after the front section 503 of the ecological flow discharge pipe plug, the embedded pipe 504 of the plug and the rear section 505 of the ecological flow discharge pipe plug have water conditions during construction of the diversion tunnel plug 201.
The joint of the plug embedded pipe 504 and the plug rear section 505 of the ecological flow discharge pipe is provided with an overhaul valve 9 and a pressure reducing valve 10.
The overhaul valve 9 and the pressure reducing valve 10 are arranged on the downstream side of the plug embedded pipe 504, and the overhaul valve 9 is used for closing the rear end relief pipe and monitoring facilities during temporary overhaul; and a pressure reducing valve 10 is arranged behind the overhaul valve 9 and is used for reducing the water pressure of the water outlet and reducing the bearing capacity of subsequent equipment.
The temporary water inlet head 8 comprises a cofferdam embedded pipe 801 and a temporary drain pipe 802, wherein the cofferdam embedded pipe 801 passes through the tunnel cofferdam 3, and the cofferdam embedded pipe 801 is connected with the ecological flow drain pipe 5 through the temporary drain pipe 802. The temporary drain pipe 802 is connected with the ecological flow discharge pipe 5 and is used for discharging the ecological flow during the plugging period (i.e. during the plug construction period) of the diversion tunnel 2.
As shown in fig. 5, the floating pumping device 11 includes a suspension mechanism, a submersible pump 1101, a pumping hose 1102, a float switch control mechanism, a temporary water storage tank 1103 and a water outlet hose 1104, wherein the temporary water storage tank 1103 is connected with the submersible pump 1101 through the pumping hose 1102, the temporary water storage tank is arranged at a height higher than that of a permanent water inlet head, the water outlet hose 1104 and a temporary water storage tank valve 1112 are arranged at the bottom of the temporary water storage tank, the water outlet hose 1104 is connected with the permanent water inlet head, a float 1109 switch control mechanism is arranged in the temporary water storage tank 1103, the float 1109 switch control mechanism is electrically connected with the submersible pump 1101, and the submersible pump 1101 is provided with the suspension mechanism.
The suspension mechanism comprises a floating pontoon 1105, an anchor rope 1106, an anchor plate 1107 and an anchor pulley 1108, wherein the submersible pump 1101 is suspended at the bottom of the floating pontoon 1105, the anchor pulley 1108 is arranged on the floating pontoon 1105, and the anchor rope 1106 passes through the anchor pulley 1108 to connect the anchor plate 1107. The anchor lines 1106 may be provided on fixable surfaces such as along the reservoir. Anchor plate 1107 is secured to the bottom of the body of water in the reservoir. The floating ball switch control mechanism comprises a floating ball 1109, a floating ball control switch 1110 and a water pump cable 1111, wherein the floating ball 1109 is suspended in the temporary water storage tank 1103, the floating ball control switch 1110 is connected with the floating ball 1109, and the floating ball control switch 1110 is connected with the submersible pump 1101 through the water pump cable 1111.
In order to meet the requirement that the river under the dam continuously maintains a certain ecological flow during the initial water storage period, when the water storage level is not submerged in the permanent water inlet 401 by a certain height, the device is arranged, so that the water pumping requirement is met, and the water pumping cost in the water storage process can be reduced. The device mainly comprises a submersible pump 1101, a floating drum 1105, a water pumping hose 1102, an anchor rope 1106, an anchor pulley 1108 and a temporary water storage tank 1103, wherein the submersible pump 1101 is hoisted below the floating drum 1105, an iron anchor disc 1107 with equivalent dead weight is arranged below the vertical anchor rope, and is placed into a bottom of a reservoir for stabilizing the floating drum 1105, and the anchor rope is led to the shore for fixing after passing through the anchor pulley 1108 so as to facilitate the overhaul and stable operation of the device; one end of the pumping hose 1102 is connected with the outlet of the submersible pump 1101, the other end of the pumping hose 1102 is connected to the temporary water storage tank 1103, the temporary water storage tank 1103 is connected with a water pump cable 1111 and a power supply side through a floating ball control switch 1110 and used for controlling the opening and closing of the submersible pump 1101, a temporary water storage tank valve 1112 is arranged at a position, which is located below the side face of the temporary water storage tank 1103, a water outlet hose 1104 is connected behind the temporary water storage tank valve 1112, and finally the temporary water storage tank is connected to the permanent water inlet 401. When the project needs to drain more, a plurality of temporary water storage tanks 1103 with close heights can be connected in series, the bottoms of the water storage tanks are basically leveled, a floating ball control switch 1110 is arranged on one temporary water storage tank 1103 farthest from the permanent water inlet 401, and each temporary water storage tank 1103 is connected through a water inlet and a water outlet arranged at a position with a lower side surface, so that the requirement of continuously draining ecological flow in the water storage process is met.
The flow automatic control valve is used for controlling the corresponding water yield by presetting a required flow value and correspondingly adjusting the opening of the automatic control valve.
The ecological flow monitoring device, the outlet end is configured with an on-line monitoring facility and is used for collecting the actual downward leakage flow, and the ecological flow monitoring device can be divided into a ecological flow digital monitoring device 701 and an ecological flow video monitoring device 702 which are respectively used for transmitting the downward leakage flow real-time monitoring data and video images to a centralized management platform of a power station and a supervision platform of a supervision department. The ecological flow digital monitoring device 701 monitors flow data by adopting equipment such as an ultrasonic flow meter and the like; the ecological flow video monitoring device 702 adopts 360-degree intelligent high-speed dome cameras and other equipment with night vision function to shoot monitoring videos, so that the leakage condition can be conveniently checked at any time.
According to the technical scheme, a mode of combining a permanent drainage device with a temporary drainage device is adopted, and in the plugging process of the diversion tunnel 2, drainage is carried out through a temporary drainage pipe 802 pre-buried at the bottom of a cofferdam of the diversion tunnel 2; in the process of completing the blocking of the diversion tunnel 2 and starting initial water storage, pumping the water body in the reservoir area into the permanent ecological flow discharge pipe 5 through the floating pumping device 11 to discharge the ecological flow; when the water level of the water storage rises and passes through the water inlet of the permanent ecological flow discharge pipe 5, and the downward discharge flow meets the requirement, the floating water pumping device 11 stops operating, and the self-flowing discharge is realized. In the initial water storage and normal operation process of the power station, the drainage flow can be monitored in real time through an ecological flow monitoring facility (comprising a digital monitoring facility and a video monitoring facility) so as to meet the monitoring requirement of downstream ecological water.
The embodiment of the invention also provides an ecological flow discharging implementation method for the pumped storage power station, which comprises the following steps:
step 1, constructing a tunnel cofferdam 3, and embedding a temporary water inlet head 8 during construction; constructing the diversion tunnel plug 201, and before the diversion tunnel plug 201 is built, conveying water to the diversion tunnel plug 201 through a temporary drain pipe 802 and extending to a downstream river;
step 2, after the diversion tunnel plug 201, the plug embedded pipe 504 and the ecological flow discharge pipe plug rear section 505 are built, the temporary drain pipe 802 is connected with the plug embedded pipe 504, and upstream inflow water is discharged to a downstream river channel through the plug embedded pipe 504 and the ecological flow discharge pipe plug rear section 505;
step 3, after the construction of the ecological flow discharging pipe plug front section 503 is completed, the temporary drain pipe 802 is connected to the ecological flow discharging pipe plug front section 503, and the flow is discharged through the ecological flow discharging pipe plug front section 503, the plug embedded pipe 504 and the ecological flow discharging pipe plug rear section 505;
and 4, after the diversion tunnel plug 201 is constructed, the tunnel cofferdam 3 is removed, the power station starts to store water in an initial stage, during the period, the water in the reservoir area is pumped to the permanent water inlet 401 through the floating pumping device 11, and the ecological flow is discharged to the downstream through the ecological flow discharge pipe 5.
When the tunnel cofferdam 3 is constructed, a cofferdam embedded pipe 801 is buried under the tunnel cofferdam 3, and a temporary drain pipe 802 is connected to the downstream side. The temporary water inlet head 8 is used for discharging ecological flow in the plugging construction process of the diversion tunnel 2, when the diversion tunnel plug 201 is constructed, upstream water is connected to the diversion tunnel 2 through the temporary water drain pipe 802, and before the diversion tunnel plug 201 is built, the water is conveyed to the diversion tunnel plug 201 through the temporary water drain pipe 802 and then extends to a downstream river channel.
After the diversion tunnel plug 201, the plug embedded pipe 504 and the ecological flow discharge pipe plug rear section 505 are built, upstream inflow water is discharged to a downstream river channel through the plug embedded pipe 504 and the ecological flow discharge pipe plug rear section 505.
After the construction of the front section 503 of the ecological flow discharging pipe plug is completed, the temporary drain pipe 802 is connected to the front section 503 of the ecological flow discharging pipe plug, and the flow is discharged through the front section 503 of the ecological flow discharging pipe plug, the embedded pipe 504 of the plug and the rear section 505 of the ecological flow discharging pipe plug.
After the diversion tunnel plug 201 is constructed, the tunnel cofferdam 3 is removed, the power station starts to store water in an initial stage, during which the water in the reservoir area is pumped to the permanent water inlet 401 through the floating pumping device 11, and the ecological flow is discharged downstream through the ecological flow discharge pipe 5.
When the tunnel cofferdam 3 is dismantled, the temporary water inlet head 8 is synchronously dismantled, the original interfaces of the temporary drain pipe 802 and the front section 503 of the ecological flow discharge pipe plug are plugged by steel plugs, and the influence on the drainage of ecological flow caused by sediment blocking in the process of dismantling the tunnel cofferdam 3 and operating the reservoir is avoided.
The floating pumping device is used when the cofferdam of the upstream diversion tunnel is removed and water storage is started, the pumping lift is reduced while the water level is lifted, and the electric energy consumption is reduced. When the device is started, the vertical anchor rope 1106 and the anchor plate 1107 are required to be placed at the bottom of the reservoir, so that the anchor plate 1107 is always positioned at the bottom of the reservoir, and the anchor rope 1106 is led to the shore through the other end of the anchor rope after passing through the anchor pulley 1108, so that the device is fixed. When the water level rises, the buoy 1105, the anchoring pulley 1108 mounted on the buoy 1105, the submersible pump 1101 and the like gradually rise along with the water level and gradually approach the anchoring end of the shore, the anchoring rope 1106 is pulled timely to separate the anchor plate 1107 from the bottom of the reservoir, and the anchor plate is sunk at the bottom of the reservoir again after a proper distance from the shore for anchoring the buoy 1105 until water is stored to about 0.5m above the elevation of the permanent water inlet 401. The submerged pump 1101 is started after the tunnel cofferdam 3 is removed, water is pumped to the temporary water storage tank 1103, the height of the bottom of the temporary water storage tank 1103 is about 0.5m higher than the elevation of the permanent water inlet 401, a temporary water storage tank valve 1112 is opened during normal use, a water outlet hose 1104 is kept sealed with the permanent water inlet 401 (the vertical trash rack 402 and the water inlet top cover 403 are not arranged temporarily before the floating pumping device is stopped), a floating ball 1109 and a matched floating ball liquid level switch 1110 in the temporary water storage tank 1103 are arranged, when the water level in the temporary water storage tank 1103 is reduced to about 30cm, the floating ball liquid level switch 1110 is arranged to be closed, the water pump cable 1111 supplies power to start pumping water to the submerged pump 1101, the pool water is pumped to the temporary water storage tank 1103 through a pumping hose 31, when the water is pumped to the highest water level from the temporary water storage tank 1103 (the elevation of the end pipe orifice of the pumping hose 1102 is not more than about 20cm from the top in general), the floating ball liquid level switch 28 is arranged to be disconnected, the submerged pump 1101 stops pumping, and the drainage flow is controlled by the automatic flow control valve 6 at the tail end of the ecological flow drainage pipe 5, and the ecological flow digital monitoring device is arranged; the 702 ecological flow video monitoring device monitors. When water is stored to about 0.5m above the permanent water inlet, the water outlet hose 1104 is disconnected from the permanent water inlet 401, the downward drainage flow of the permanent water inlet 401 comes from the water body in the reservoir area, and meanwhile, the vertical trash rack 402 and the water inlet top cover 403 are installed, and the floating water pumping device 11 is removed.
Claims (8)
1. The ecological flow discharging facility for the pumped storage power station comprises a tunnel upper cover layer (1), a diversion tunnel (2) and a tunnel cofferdam (3), wherein the diversion tunnel (2) is arranged below the tunnel upper cover layer (1), one side of the tunnel upper cover layer (1) facing a reservoir is a slope (101), and the tunnel cofferdam (3) is arranged on one side of the tunnel upper cover layer (1) provided with the slope (101), and is characterized by further comprising a permanent water inlet head (4), an ecological flow discharging pipe (5), an automatic flow control valve (6), an ecological flow monitoring device, a temporary water inlet head (8) and a floating pumping device (11), wherein the permanent water inlet head (4) is arranged on the slope (101) of the tunnel upper cover layer (1); the upper end of the ecological flow discharge pipe (5) is connected with the permanent water inlet head (4), and the lower end of the ecological flow discharge pipe (5) passes through the diversion tunnel (2); the temporary water inlet head (8) extends from the tunnel cofferdam (3) to the lower end of the ecological flow discharge pipe (5) and is connected with the ecological flow discharge pipe (5); the automatic flow control valve (6) and the ecological flow monitoring device are arranged at one end of the ecological flow discharge pipe (5) penetrating through the diversion tunnel (2); the floating water pumping device (11) is arranged between the diversion tunnel (2) and the tunnel cofferdam (3), and the floating water pumping device (11) is connected with the permanent water inlet head (4);
the floating pumping device (11) comprises a suspension mechanism, a submersible pump (1101), a pumping hose (1102), a floating ball (1109) switch control mechanism, a temporary water storage tank (1103) and a water outlet hose (1104), wherein the temporary water storage tank (1103) is connected with the submersible pump (1101) through the pumping hose (1102), the temporary water storage tank (1103) is higher than a permanent water inlet head (4), the water outlet hose (1104) is arranged at the bottom of the temporary water storage tank (1103), the water outlet hose (1104) is connected with the permanent water inlet head (4), the floating ball (1109) switch control mechanism is arranged in the temporary water storage tank (1103), the floating ball (1109) switch control mechanism is electrically connected with the submersible pump (1101), and the submersible pump (1101) is provided with the suspension mechanism;
the top of the permanent water inlet (401) is higher than the maximum sediment accumulation line of the reservoir and lower than the dead water level of the reservoir.
2. The ecological flow discharge facility for a pumped storage power station according to claim 1, wherein the permanent water inlet head (4) comprises a permanent water inlet (401), a vertical trash rack (402) and an inverted trapezoid water inlet top cover (403), the permanent water inlet (401) is vertically arranged on a slope (101) of a tunnel upper covering layer (1), the vertical trash rack (402) is arranged at the upper end of the permanent water inlet (401), and the water inlet top cover (403) is arranged at the top end of the vertical trash rack (402).
3. The ecological flow discharge facility for a pumped storage power station according to claim 1, wherein a diversion tunnel plug (201) is arranged in the diversion tunnel (2), and the ecological flow discharge pipe (5) passes through the diversion tunnel plug (201).
4. The ecological flow discharging facility for a pumped storage power station according to claim 3, wherein the ecological flow discharging pipe (5) comprises a slope ecological flow discharging pipe (501), a vertical ecological flow discharging pipe (502), an ecological flow discharging pipe plug front section (503), a plug pre-buried pipe (504) and an ecological flow discharging pipe plug rear section (505), the slope ecological flow discharging pipe (501) is arranged along a slope (101) of a tunnel upper covering layer (1), a permanent water inlet head (4) is connected to the upper end of the slope ecological flow discharging pipe (501), the vertical ecological flow discharging pipe (502) is connected to the lower end of the slope ecological flow discharging pipe (501) and is vertically arranged at one end of a diversion tunnel (2) close to a cofferdam (3), the plug pre-buried pipe (504) passes through the diversion tunnel plug (201), the ecological flow discharging pipe plug front section (503) is arranged between the vertical ecological flow discharging pipe (502) and the plug pre-buried pipe (504), the ecological flow discharging pipe plug rear section (505) is connected with the plug pre-buried pipe (502) and is far away from the ecological flow discharging pipe (6) and the ecological flow discharging pipe (6) is arranged at one end of the diversion tunnel.
5. The ecological flow discharge facility for a pumped storage power station as claimed in claim 4, wherein an inspection valve (9) and a pressure reducing valve (10) are arranged at the joint of the plug pre-buried pipe (504) and the plug rear section (505) of the ecological flow discharge pipe.
6. The ecological flow discharge facility for a pumped-storage power station according to claim 1, characterized in that the temporary water inlet head (8) comprises a cofferdam pre-buried pipe (801) and a temporary water drain pipe (802), the cofferdam pre-buried pipe (801) passes through the tunnel cofferdam (3), and the cofferdam pre-buried pipe (801) is connected with the ecological flow discharge pipe (5) through the temporary water drain pipe (802).
7. The ecological flow rate bleeding facility for a pumped-hydro power station according to claim 1, characterized in that the suspension mechanism comprises a buoy (1105), an anchor rope (1106), an anchor disc (1107) and an anchor pulley (1108), the submersible pump (1101) is suspended at the bottom of the buoy (1105), the anchor pulley (1108) is arranged on the buoy (1105), and the anchor rope (1106) is connected with the anchor disc (1107) through the anchor pulley (1108); the floating ball (1109) switch control mechanism comprises a floating ball (1109), a floating ball control switch (1110) and a water pump cable (1111), wherein the floating ball (1109) is suspended in the temporary water storage tank (1103), the floating ball control switch (1110) is connected with the floating ball (1109), and the floating ball control switch (1110) is connected with the submersible pump (1101) through the water pump cable (1111).
8. An ecological flow discharge implementation method for a pumped storage power station, an ecological flow rate discharge facility for a pumped-storage power station as claimed in any one of claims 1 to 7, characterized in that the method comprises the steps of:
step 1, constructing a tunnel cofferdam (3), and embedding a temporary water inlet head (8) during construction; constructing a diversion tunnel plug (201), and before the diversion tunnel plug (201) is built, conveying water to the diversion tunnel plug (201) through a temporary drain pipe (802) and extending to a downstream river;
step 2, after a diversion tunnel plug (201), a plug embedded pipe (504) and an ecological flow discharge pipe plug rear section (505) are built, connecting the temporary drain pipe (802) with the plug embedded pipe (504), and discharging upstream inflow water to a downstream river channel through the plug embedded pipe (504) and the ecological flow discharge pipe plug rear section (505);
step 3, after the construction of the ecological flow discharging pipe plug front section (503) is completed, connecting a temporary drain pipe (802) to the ecological flow discharging pipe plug front section (503), and discharging flow through the ecological flow discharging pipe plug front section (503), the plug embedded pipe (504) and the ecological flow discharging pipe plug rear section (505);
and 4, after the construction of the diversion tunnel plug (201) is finished, the cofferdam (3) of the tunnel is dismantled, the power station starts initial water storage, during the period, water in the reservoir area is pumped to a permanent water inlet (401) through a floating pumping device (11), and ecological flow is discharged to the downstream through an ecological flow discharge pipe (5).
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| WO2012030115A1 (en) * | 2010-08-30 | 2012-03-08 | Park Kil Jong | Method for constructing an energy circulation reservoir having an increased water storage capacity |
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| WO2012030115A1 (en) * | 2010-08-30 | 2012-03-08 | Park Kil Jong | Method for constructing an energy circulation reservoir having an increased water storage capacity |
| CN204023486U (en) * | 2014-07-24 | 2014-12-17 | 中国电建集团贵阳勘测设计研究院有限公司 | Structure for providing downward discharge ecological flow for initial reservoir storage |
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