阅读说明：本技术 一种叠梁门控制系统及控制方法 (Stop log door control system and control method ) 是由 魏杰 陈昕蓓 周小飞 汤新武 许传勇 于 2020-04-26 设计创作，主要内容包括：本发明公开了一种叠梁门控制系统及控制方法,在水电站正常运行时通过控制多层叠梁门和活动叠梁门来稳定淹没水深,当水库水位变幅不超过单层叠梁门高度时,通过控制活动叠梁门的升降使水库水位变幅与活动叠梁门升降同步,以维持淹没深度不变,使得引用水仍为表层一定范围内的水,在水库水位上升时避免了下泄水温降低对生态环境的影响,在水库水位下降时保证了进水口流态稳定,减小了水头损失；当水库水位稳定时,通过尾水水温控制活动叠梁门的升降使下泄水温维持在生态环境所需温度范围内,进一步避免了下泄水温对生态环境的影响。(The invention discloses a stop log gate control system and a control method, wherein the submerged depth is stabilized by controlling a plurality of layers of stop log gates and a movable stop log gate when a hydropower station operates normally, and when the variation of the reservoir water level does not exceed the height of a single-layer stop log gate, the variation of the reservoir water level is synchronized with the lifting of the movable stop log gate by controlling the lifting of the movable stop log gate so as to maintain the submerged depth unchanged, so that the lead water is still water in a certain range of the surface layer, the influence of the reduction of the lower discharge water temperature on the ecological environment is avoided when the reservoir water level rises, the flow state of a water inlet is ensured to be stable when the reservoir water level falls, and the head loss is reduced; when the reservoir water level is stable, the tail water temperature controls the lifting of the movable stop log door to maintain the temperature of the discharged water within the temperature range required by the ecological environment, and the influence of the temperature of the discharged water on the ecological environment is further avoided.)

1. The utility model provides a stop log door control system, includes multilayer stop log door slot (2) and locates multilayer stop log door (3) in multilayer stop log door slot (2), its characterized in that still includes:

the movable stop log door device comprises a movable stop log door groove (4) and a movable stop log door (5) arranged in the movable stop log door groove (4), wherein the multilayer stop log door groove (2) and the movable stop log door groove (4) are arranged adjacently;

the water level monitoring unit is used for monitoring the water level of the reservoir and transmitting the water level data of the reservoir to the stop log door lifting control unit;

the lower drainage water temperature monitoring unit is used for monitoring the tail water temperature and transmitting the tail water temperature data to the stop log door lifting control unit;

and the stop log door lifting control unit is arranged in the movable stop log door groove (4) and is used for carrying out lifting control on the movable stop log door (5) according to the reservoir water level data and the tail water temperature data.

2. A stack door control system as claimed in claim 1, wherein: the stop log door lifting control unit comprises a control module, a data receiving module and a power device (8), wherein the data receiving module and the power device are respectively connected with the control module; the power device (8) is respectively connected with the guide rail and the brake; the guide rail and the brake are arranged on the side wall of the movable stop log door groove (4), and the guide rail is fixedly connected with the movable stop log door (5).

3. A stack door control system as claimed in claim 1, wherein: the water level monitoring unit comprises a water level sensor (6) and a water level data feedback module (7);

the installation height of the water level sensor (6) is below the dead water level of the hydropower station and is positioned at the stable position of the reservoir water surface, and the water level sensor (6) is used for monitoring the water level in the reservoir and transmitting the water level data to the water level data feedback module (7);

and the water level data feedback module (7) is used for acquiring water level data of the reservoir and feeding the water level data back to the stop log door lifting control unit.

4. A stack door control system as claimed in claim 1, wherein: the lower leakage water temperature monitoring unit comprises a temperature sensor (11) and a temperature data feedback module (12);

the temperature sensor (11) is arranged at an outlet of the tail water tunnel and used for monitoring the water temperature of tail water and sending the water temperature data to the temperature data feedback module (12);

the temperature data feedback module (12) is used for acquiring water temperature data and feeding the water temperature data back to the stop log door lifting control unit;

preferably, the lower water temperature monitoring unit further comprises a mixed flow device (13) connected with the stop log door lifting control unit, and the mixed flow device (13) is arranged at the tail water tunnel outlet.

5. A stack door control system as claimed in claim 1, wherein: the upper half part of the multilayer stop log door (3) is overlapped with the lower half part of the movable stop log door (5), and the overlapped parts are attached to each other.

6. A stack door control system as claimed in claim 1, wherein: the movable stop log door (5) comprises a main water baffle (501), a side water baffle (502) and a flow guide structure (503); the side water baffles (502) are arranged on two sides of the main water baffle (501), and the side water baffles (502) are embedded in the movable stop log door groove (4); the flow guide structure (503) is arranged at the top of the main water baffle (501).

7. A stack door control system as claimed in claim 6, wherein: the cross section of the flow guide structure (503) is semicircular.

8. A stack door control system as claimed in claim 6, wherein: the height of the main water baffle (501) is equal to that of the two-layer stop log door.

9. A stack door control system as claimed in claim 6, wherein: the thickness of the main water baffle (501) is smaller than that of the multi-layer laminated beam door (3).

10. A method for controlling a stop log door is characterized in that: including locating multilayer stoplog door (3) in multilayer stoplog door groove (2) and locating activity stoplog door (5) in activity stoplog door groove (4), multilayer stoplog door groove (2) and activity stoplog door groove (4) adjacent setting, specific control step is:

step 1: acquiring reservoir water temperature data and tail water temperature data;

step 2: when the variation of the reservoir water level is less than or equal to the height of the single-layer stop log door, controlling the lifting of the movable stop log door (5) to enable the lifting of the movable stop log door (5) to be synchronous with the variation of the reservoir water level;

when the variation of the reservoir water level is greater than the height of the single-layer stop log gate, the movable stop log gate (5) stops lifting, a layer of stop log gate is extracted or placed on the multilayer stop log gate (3), and then the lifting of the movable stop log gate (5) is continuously adjusted according to the variation of the reservoir water level, so that the lifting of the movable stop log gate (5) is synchronous with the variation of the reservoir water level;

when the reservoir water level is kept stable, the movable stop log door (5) is controlled to lift according to the tail water temperature, so that the temperature of the discharged water is kept within the temperature range required by the ecological environment, and the head loss is reduced.

Technical Field

The invention belongs to the technical field of layered water taking of hydraulic and hydroelectric engineering, and particularly relates to a stoplog door control system and a stoplog door control method suitable for water level amplitude variation.

Background

As is known to all, after a reservoir is built, the water temperature in front of a reservoir area dam is in a stable layering phenomenon (a temperature changing layer, a temperature jump layer and a temperature stagnation layer), and the water temperature layering enables the water temperature of a lower-layer water body of the reservoir to be maintained in a stable low-temperature state all the year round, so that the water temperature discharged during power generation in spring and summer is lower than the water temperature of a river channel under the natural condition, and the problem of low-temperature water environment hazard caused by the construction of hydroelectric engineering of a high-dam reservoir is caused. The discharge of the low-temperature water in the reservoir brings adverse effects to crops, fishes, and rare or endangered aquatic organisms in the downstream of the riverway, and even can seriously affect the spawning, propagation and growth of the downstream aquatic organisms. The laminated water taking is carried out by using the stop log gate structure, the water temperature of the dam discharged downwards can be effectively improved, and the biological population structure of the downstream river channel is protected from being damaged.

At present, a plurality of layers of stoplog doors are arranged in front of a water inlet so as to ensure that the generating water of a unit is obtained from the surface layer of a reservoir as much as possible, thereby reducing the influence of the temperature of the discharged water of a power station on the environment; however, the stop log door can be placed or extracted only when the water level variation exceeds the height of the single-layer stop log door, and the stop log door cannot be adjusted when the variation of the water level of the reservoir is smaller than the height of the single-layer stop log door. As shown in fig. 1, in order to avoid introducing low-temperature water from the bottom of reservoir temperature stratification in a conventional hydropower station, the multi-layer laminated beam doors 3 are formed by vertically stacking laminated beam doors, the height of each laminated beam door is the same, and introduced water is surface water between the top of the multi-layer laminated beam door 3 and the water surface (submerging depth), so that the effect of increasing the temperature of the discharged water is achieved. In the actual operation process, when the water level of the reservoir rises or falls, the multilayer stoplog doors 3 cannot change along with the change of the water level of the reservoir, and only when the rising or falling amplitude of the water level of the reservoir reaches the height of the single-layer stoplog door, the single-layer stoplog doors can be placed or taken out to maintain the submerged depth of water unchanged, so that the water introduced by the reservoir is still water in a certain range on the surface layer.

Obviously, in the process of reducing the water level of the reservoir, the flow state of the water inlet is deteriorated, the flow velocity of water flow is increased, certain impact damage can be caused to the trash rack, and meanwhile, the head loss of the reservoir is increased, so that the power generation benefit of a hydropower station is influenced; in the process of rising of the water level of the reservoir, more lower-layer water obtained by the unit has certain influence on the temperature of the leaked water, and the influence is particularly obvious when the water level of the reservoir changes frequently or the height of the single-layer stoplog door is large. Therefore, when the water level of the reservoir changes, the requirement of the discharged water temperature is met, and the maximization of the improvement of the generating efficiency of the hydropower station is happy for enterprises.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a stoplog door control system and a stoplog door control method, which aim to solve the problems of influence of lower water discharge temperature on ecological environment and increase of head loss.

The invention solves the technical problems through the following technical scheme: the utility model provides a stop log door control system, includes multilayer stop log door slot and locates multilayer stop log door in the multilayer stop log door slot, characterized by still includes:

the movable stop log door device comprises a movable stop log door groove and a movable stop log door arranged in the movable stop log door groove, and the multilayer stop log door groove and the movable stop log door groove are arranged adjacently;

the water level monitoring unit is used for monitoring the water level of the reservoir and transmitting the water level data of the reservoir to the stop log door lifting control unit;

the lower drainage water temperature monitoring unit is used for monitoring the tail water temperature and transmitting the tail water temperature data to the stop log door lifting control unit;

and the stop log door lifting control unit is arranged in the movable stop log door groove and is used for carrying out lifting control on the movable stop log door according to the reservoir water level data and the tail water temperature data.

According to the stoplog door control system, when the hydropower station normally operates, the multilayer stoplog door and the movable stoplog door are controlled to stabilize the submerged water depth, when the reservoir water level amplitude does not exceed the height of the single-layer stoplog door, the movable stoplog door is controlled to lift, so that the reservoir water level amplitude and the movable stoplog door are synchronously lifted, the submerged depth is maintained unchanged, the water is still water in a certain range of the surface layer, the influence of the lower leakage water temperature reduction on the ecological environment is avoided when the reservoir water level rises, the flow state of a water inlet is ensured to be stable when the reservoir water level falls, and the head loss is reduced; when the water level of the reservoir is stable, the lifting of the movable stoplog door is controlled through the tail water temperature to enable the lower leakage water temperature to be maintained in the temperature range required by the ecological environment, so that the influence of the lower leakage water temperature on the ecological environment is further avoided, specifically, when the water level of the reservoir is stable and the lower leakage water temperature is high, the submergence depth is increased by controlling the movable stoplog door to descend, so that the head loss is further reduced, the power generation benefit is increased, when the water level of the reservoir is stable and the lower leakage water temperature is low, the lower leakage water temperature is improved by controlling the movable stoplog door to ascend, so that the lower leakage water temperature is maintained in the temperature range required by the ecological environment, and the influence of the lower leakage water temperature on the ecological environment; when the reservoir water level changes, because the reservoir water level amplitude and the lifting of the movable stop log door are synchronous, the stable flow state of the water inlet is ensured under the condition of meeting the water temperature of the lower drain, and the head loss is reduced to the maximum extent, so that the power generation benefit is increased, and the impact damage to the trash rack is also avoided.

Further, the stop log door lifting control unit comprises a control module, and a data receiving module and a power device which are respectively connected with the control module; the power device is respectively connected with the guide rail and the brake; the guide rail and the brake are arranged on the side wall of the movable stop log door groove, and the guide rail is fixedly connected with the movable stop log door.

The control module controls the power device according to the reservoir water temperature data and the tail water temperature data obtained from the data receiving module, so that the movable stop log door is controlled to lift in the movable stop log door groove.

Further, the water level monitoring unit comprises a water level sensor and a water level data feedback module;

the installation height of the water level sensor is below the dead water level of the hydropower station and is positioned at the stable position of the reservoir water level, and the water level sensor is used for monitoring the water level in the reservoir and transmitting the water level data to the water level data feedback module;

and the water level data feedback module is used for acquiring water level data of the reservoir and feeding the water level data back to the stop log door lifting control unit.

Further, the let-down water temperature monitoring unit comprises a temperature sensor and a temperature data feedback module; the temperature sensor is arranged at the outlet of the tail water tunnel and used for monitoring the water temperature of tail water and sending the water temperature data to the temperature data feedback module;

and the temperature data feedback module is used for acquiring water temperature data and feeding the water temperature data back to the stop log door lifting control unit.

Preferably, the lower temperature monitoring unit that lets out still include with the mixed flow device that stoplog door lift control unit is connected, the mixed flow device is located tailwater tunnel exit, through the mixed flow module with the water intensive mixing, has effectively reduced and has aroused because of the temperature uneven distribution and obtain the monitoring error.

Further, there is the overlapping in the upper half of multilayer stoplog door and the lower half of activity stoplog door, the overlap portion laminates mutually, and it is serious to have avoided the space between multilayer stoplog door and the activity stoplog door to lead to the infiltration.

Furthermore, the movable stop log door comprises a main water baffle, a side water baffle and a flow guide structure; the side water baffles are arranged on two sides of the main water baffle and embedded in the movable stop log door groove; the flow guide structure is arranged at the top of the main water baffle. The water flows through the movable beam-folding door more smoothly through the diversion structure, and the local head loss can be effectively reduced.

Further, the cross section of the flow guide structure is semicircular.

Furthermore, the height of the main water baffle is equal to that of the two layers of stop log doors, so that the movable stop log doors can be adjusted in the rising and falling processes of the water level, and meanwhile, due to the existence of the flow guide structure, the upper half parts of the multilayer stop log doors and the lower half parts of the movable stop log doors are always partially overlapped, and the water seepage possibility is reduced.

Furthermore, the thickness of the main water baffle is smaller than that of the multi-layer stop log door, and because the main water baffle is always above the multi-layer stop log door in the process of water level amplitude variation and the pressure borne by the power station in the processes of closing and opening the gate is small, the thickness of the main water baffle is smaller than that of the multi-layer stop log door during manufacturing, and the construction cost is reduced.

The invention also provides a stop log gate control method, which comprises a multilayer stop log gate arranged in the multilayer stop log gate groove and a movable stop log gate arranged in the movable stop log gate groove, wherein the multilayer stop log gate groove and the movable stop log gate groove are adjacently arranged, and the specific control steps are as follows:

step 1: acquiring reservoir water temperature data and tail water temperature data;

step 2: when the variation of the reservoir water level is less than or equal to the height of the single-layer stop log door, controlling the lifting of the movable stop log door to enable the lifting of the movable stop log door to be synchronous with the variation of the reservoir water level;

when the variation of the reservoir water level is greater than the height of the single-layer stop log gate, the movable stop log gate stops lifting, a layer of stop log gate is extracted or placed on the multilayer stop log gate, and then the lifting of the movable stop log gate is continuously adjusted according to the variation of the reservoir water level, so that the lifting of the movable stop log gate (5) is synchronous with the variation of the reservoir water level;

when the reservoir water level is kept stable, the movable stop log door is controlled to lift according to the tail water temperature, so that the temperature of the discharged water is kept within the temperature range required by the ecological environment, and the head loss is reduced.

Advantageous effects

Compared with the prior art, the stack door control system and the control method provided by the invention have the advantages that the submerged water depth is stabilized by controlling the multilayer stack doors and the movable stack doors when the hydropower station normally operates, when the variation of the reservoir water level does not exceed the height of the single-layer stack door, the variation of the reservoir water level is synchronized with the lifting of the movable stack doors by controlling the lifting of the movable stack doors so as to maintain the submerged depth unchanged, so that the guide water is still water in a certain range of the surface layer, the influence of the reduction of the let-down water temperature on the ecological environment is avoided when the reservoir water level rises, the flow state of a water inlet is ensured to be stable when the reservoir water level falls, and the head loss is reduced; when the reservoir water level is stable, the tail water temperature controls the lifting of the movable stop log door to maintain the temperature of the discharged water within the temperature range required by the ecological environment, and the influence of the temperature of the discharged water on the ecological environment is further avoided.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic view of a conventional layered water intake stack door in the background of the invention;

FIG. 2 is a schematic view of a stop log door control system according to an embodiment of the invention;

FIG. 3 is a schematic view of a sectional view of a multi-level stack door and a sectional view of a movable stack door according to an embodiment of the present invention;

FIG. 4 is a top view of FIG. 3 in an embodiment of the present invention;

FIG. 5 is a longitudinal sectional view of FIG. 3 in the embodiment of the present invention;

FIG. 6 is a schematic structural view of a movable stop log door according to an embodiment of the invention;

the system comprises a trash rack door groove, a 2-multilayer stoplog door groove, a 3-multilayer stoplog door, a 4-movable stoplog door groove, a 5-movable stoplog door, a 501-main water baffle, a 502-side water baffle, a 503-flow guide structure, a 6-water level sensor, a 7-water level data feedback module, an 8-power device, a 9-access door groove, a 10-accident door groove, a 11-temperature sensor, a 12-temperature data feedback module, a 13-mixed flow device, a 14-vent hole and an A-power station dead water level (the lowest water level which allows a reservoir to be dissolved and fallen under normal operation conditions).

Detailed Description

The technical solutions in the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 2, the stop log door control system provided by the present invention comprises a multi-layer stop log door groove 2, a multi-layer stop log door 3 disposed in the multi-layer stop log door groove 2, a water level monitoring unit, a lower water leakage temperature monitoring unit, a stop log door lifting control unit, and a movable stop log door device; the water level monitoring unit and the lower water discharge temperature monitoring unit are respectively and electrically connected with the stop log door lifting control unit; the movable stop log gate device comprises a movable stop log gate groove 4 and a movable stop log gate 5 arranged in the movable stop log gate groove 4, the multilayer stop log gate 3 and the movable stop log gate 5 are sequentially arranged along the water flow direction (or the movable stop log gate 5 and the multilayer stop log gate 3 are sequentially arranged along the water flow direction), the top of the movable stop log gate 5 is higher than that of the multilayer stop log gate 3 (the lower half part of the movable stop log gate 5 is overlapped with the upper half part of the multilayer stop log gate 3, the overlapped parts are mutually attached, and the possibility of water seepage is reduced), and as shown in fig. 3-5, the water flow direction refers to the direction from a reservoir to the downstream through a water inlet. The multilayer stoplog door 3 and the movable stoplog door 5 are both arranged at the water inlet.

The water level monitoring unit comprises a water level sensor 6 and a water level data feedback module 7, the lower discharge water temperature monitoring unit comprises a temperature sensor 11 and a temperature data feedback module 12, the stop log door lifting control unit comprises a control module, a data receiving module, a power device 8, a guide rail and a brake, the water level sensor 6 is electrically connected with the water level data feedback module 7, the temperature sensor 11 is electrically connected with the temperature data feedback module 12, the water level data feedback module 7 and the temperature data feedback module 12 are respectively electrically connected with the data receiving module, the data receiving module and the power device 8 are respectively electrically connected with the control module, the power device 8 is respectively connected with the guide rail and the brake, and the power device is arranged at the top of the movable stop log door groove 4. the installation height of the water level sensor 6 is below the dead water level A of the hydropower station and is positioned at a stable position of the water level of the hydropower station, so that the water level sensor 6 can monitor the water level in the water pool and transmit the water level data to the water level data feedback module 7 under different water level conditions of the water level in the hydropower station, the tail water level sensor 11 is arranged at the tail hole for monitoring the water temperature of the water (the water after the water comes out and transmits the water level data received by the water level data receiving module 12 and the movable stop log door, the control module, the movable stop log door, the control module 358, the control module and the stop log door, the control module is similar to the lift control module, the lift gate door lifting control module, the lift gate door, the lift control module, the lift gate door lifting control module.

As shown in fig. 6, the movable stop log door 5 includes a main water deflector 501, a side water deflector 502, and a flow guide structure 503; the side water baffles 502 are arranged at two sides of the main water baffle 501, the side water baffles 502 are embedded in the movable stop log door groove 4, the side water baffles 502 are fixedly connected with the guide rail, and the movable stop log door 5 is driven to move up and down by the power provided by the power device 8; the diversion structure 503 is arranged at the top of the main water baffle 501, water flows through the movable beam-folding door more smoothly through the diversion structure 503, local head loss can be effectively reduced, the head loss refers to the loss of mechanical energy of unit mass liquid in the movement process of water flow, and the more stable the water flow speed is, the smaller the head loss is. In this embodiment, the cross section of the flow guiding structure 503 is semicircular.

As shown in fig. 5, the height of the main water baffle 501 is equal to the height of two layers of the stop log doors, that is, b =2a, b is the height of the main water baffle 501, and a is the height of a single layer or one layer of the stop log doors, so that the submerged water depth can be maintained stably by adjusting the movable stop log door 5 when the water level rising amplitude and the water level falling amplitude are not more than a, so that the lead water is still water in a certain range on the surface layer, the influence of the water temperature of the lower drain on the ecological environment is avoided when the water level of the reservoir rises, the stable flow state of the water inlet is ensured when the water level of the reservoir falls, the head loss is reduced, and meanwhile, due to the existence of the diversion structure 503, the top of the multi-layer stop log doors 3 and the bottom of the movable stop log doors 5 can be always partially overlapped and. The main water baffle 501 is always above the multi-layer stop log door 3 in the process of water level amplitude variation, and the pressure borne by the power station in the processes of closing and opening the gate is small, so that the groove width d of the movable stop log door groove 4 is smaller than the groove width c of the multi-layer stop log door groove 2 (namely the thickness of the movable stop log door 5 is smaller than that of the multi-layer stop log door 3), and the construction cost is small.

The initial position of the movable stop log gate 5 is that the movable stop log gate 5 is higher than the multi-layer stop log gate 3 by the height a of a stop log gate, and the specific working process of the stop log gate control system is as follows:

when the water level sensor 6 detects that the water level of the reservoir rises and the rising amplitude does not exceed the height a of the one-layer or single-layer stack door, the movable stack door 5 is controlled to rise, and the rising amplitude of the movable stack door 5 is synchronous with the rising amplitude of the water level of the reservoir, when the water level of the reservoir stops rising (namely the water level of the reservoir is stable), the movable stack door 5 is continuously controlled to rise according to the temperature of the tail water detected by the temperature sensor 11 so as to ensure that the temperature of the tail water is maintained within the temperature range required by the ecological environment, in particular, when the temperature of the tail water is less than the lower limit value of the temperature range required by the ecological environment (or is greater than the upper limit value of the temperature range required by the ecological environment), the movable stack door 5 is controlled to rise (or the movable stack door 5 is controlled to fall) until the temperature of the tail water is within the temperature range required by the ecological environment, and the influence of, meanwhile, when the water level of the reservoir is stable and the lower discharge water temperature is larger than the upper limit value of the temperature range required by the ecological environment, the water head loss is further reduced by descending the movable stoplog door 5 (increasing the water taking depth), wherein the lower discharge water temperature refers to the temperature of discharged water from the reservoir or from the upstream to the downstream.

When the rising amplitude of the water level of the reservoir is larger than the height a of the single-layer stop log gate, the movable stop log gate 5 stops rising, the multi-layer stop log gate 3 is provided with the one-layer stop log gate, and then the movable stop log gate 5 is continuously adjusted to synchronously rise according to the rising amplitude of the water level of the reservoir.

When the water level sensor 6 detects that the water level of the reservoir falls and the falling amplitude does not exceed the height a of the one-layer or single-layer stack door, the movable stack door 5 is controlled to fall, and the falling amplitude of the movable stack door 5 is synchronous with the falling amplitude of the water level of the reservoir, when the water level of the reservoir stops falling (namely the water level of the reservoir is stable), the movable stack door 5 is continuously controlled to rise according to the temperature of the tail water detected by the temperature sensor 11, so that the temperature of the tail water is maintained within the temperature range required by the ecological environment, in particular, when the temperature of the tail water is less than the lower limit value of the temperature range required by the ecological environment (or is greater than the upper limit value of the temperature range required by the ecological environment), the movable stack door 5 is controlled to rise (or the movable stack door 5 is controlled to fall) until the temperature of the tail water is within the temperature range required by the ecological environment, the flow state of the, when the reservoir water level is stable and the temperature of the discharged water is greater than the upper limit value of the temperature range required by the ecological environment, the head loss is further reduced by the descending (increasing the water taking depth) of the movable stoplog door 5.

When the descending amplitude of the reservoir water level is larger than the height a of the single-layer stop log gate, the movable stop log gate 5 stops descending, the multi-layer stop log gate 3 is provided with the one-layer stop log gate, and then the movable stop log gate 5 is continuously regulated to synchronously descend according to the descending amplitude of the reservoir water level.

The vent hole 14 in fig. 2 is generally located behind the emergency gate of the water inlet of the power station, the main function of the vent hole 14 is to exhaust when the water guide channel is filled with water, and to supplement air to prevent harmful vacuum when the emergency gate is closed to empty the water guide channel, the patio structure of the patio is similar to a lateral pressure pipe in hydraulics, under the condition that the unit quote flow is constant, the average flow velocity of the cross section at the vent hole 14 is a constant value, and the flow velocity head is a constant value, so the total head depends on the water level of the vent hole 14. When the reservoir water level sensor 6 is positioned at the stable position of the reservoir water level, the flow speed water head can be ignored, and the total water head of the reservoir only depends on the water level of the reservoir, so the water head loss of the water inlet can be obtained by comparing the water level of the vent hole 14 with the water level of the reservoir, the water head loss can be monitored, and the lifting of the movable stoplog door 5 can be adjusted according to the water head loss.

The water level monitoring unit can also be a water temperature sensor with a data remote online transmission function, the water level monitoring unit can also be a water level sensor with a data remote online transmission function, the water level measurement precision is 0.1 meter, the working depth range can reach 200 meters, the water level data recording frequency can be randomly set in a range of 10 min-3 h, the water level sensor adopts a battery as a power supply and is packaged by a stainless steel shell with the wall thickness of only 0.2mm, the heat storage capacity is extremely small, the sensitivity is high, the range is-40-100 ℃, the water temperature data recording frequency can be randomly set in a range of 10 min-3 h, the water temperature sensor adopts a battery as a power supply and is packaged by a stainless steel shell with the wall thickness of only 0.2mm, the heat storage capacity is extremely small, the sensitivity is high, and the characteristics of-40-100 ℃, the water temperature data recording frequency is randomly set in a range of 10 min-3 h, the water temperature sensor adopts a battery as a power supply, a guide rail and a brake, a stack door power control module L is adopted, and the water level monitoring unit can directly process the water temperature sensor according to the data.

The invention also provides a stop log door control method, which comprises a multilayer stop log door and a movable stop log door which are sequentially arranged along the water flow direction, and the specific control steps are as follows:

step 1: acquiring reservoir water temperature data and tail water temperature data;

step 2: when the variation of the reservoir water level is less than or equal to the height of the single-layer stop log door, controlling the lifting of the movable stop log door to enable the lifting of the movable stop log door to be synchronous with the variation of the reservoir water level;

when the variation of the reservoir water level is greater than the height of the single-layer stop log gate, the movable stop log gate stops lifting, a layer of stop log gate is extracted or placed on the multilayer stop log gate, and then the lifting of the movable stop log gate is continuously adjusted according to the variation of the reservoir water level, so that the lifting of the movable stop log gate (5) is synchronous with the variation of the reservoir water level;

when the reservoir water level is kept stable, the movable stop log door is controlled to lift according to the tail water temperature, so that the temperature of the discharged water is kept within the temperature range required by the ecological environment, and the head loss is reduced.

The above disclosure is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of changes or modifications within the technical scope of the present invention, and shall be covered by the scope of the present invention.