A water retaining gate

Abstract

The present application provides a water retaining gate, which comprises: shutter units stacked thereon, the shutter units comprising: a support frame, and shutter doors, the shutter doors being rotatably connected to the support frame through a rotating shaft and bearings, the shutter doors being eccentrically arranged with respect to the rotating shaft, so that they can be automatically closed under the action of underwater pressure and gravity, a torque transmission device fixedly connected to the shutter doors, a floating box having a torque chute, and at least two floating box guide wheels fixedly connected to the floating box and connected to an external guide rail to limit the movement direction of the floating box, the floating box being capable of moving along the guide rail under the action of buoyancy of water and its own gravity, so that the torque transmission device contacts the torque chute to generate torque and transmits the torque to the shutter doors to open the shutter doors, thereby achieving power-free automatic surface water intake and power generation.

Description

Technical Field

[0001] The present invention relates to the field of hydropower generation, and particularly to a hydraulic metal structure device, a water retaining gate. The gate utilizes the buoyancy of a floating box and a counterweight to drive the opening and closing of a louvered door, thereby realizing power-free automatic surface water intake for power generation. Background Art

[0002] Currently, for hydropower stations with submersible intakes, the power generation water flow passes through a trash rack and is diverted from the bottom after impoundment. For high dams and large reservoirs, the water temperature structure of the reservoir is of a stable stratified type, and water temperature stratification will occur after impoundment. There are obvious differences between the discharged water temperature and the natural river water temperature at the dam site section. Taking the Altashi Water Conservancy Project in Xinjiang as an example, the total reservoir capacity is 2.245 billion m 3 , the maximum dam height is 164.8 m, and the average annual runoff at the dam site section is 6.417 billion m 3 . Its main changes are as follows: from March to August, the discharged water temperature of the reservoir is lower than the river water temperature, and the maximum drop of the low-temperature water is 10.4 °C, which occurs in May; from August to February of the following year, the discharged water temperature of the reservoir is higher than the river water temperature, and the maximum rise of the high-temperature water is 5.5 °C, which occurs in December.

[0003] The discharge of low-temperature water from the reservoir has a greater adverse impact on the ecology. To protect the downstream ecology and mitigate the impact of the discharged low-temperature water on the aquatic ecology and irrigation agriculture, environmental protection requires that power generation water intake should be from the surface water. Therefore, different water intake methods are adopted. According to the water inflow conditions of different normal years and the reservoir operation data, there are schemes such as single-layer water intake, two-layer water intake, three-layer water intake, and stoplog gate water intake.

[0004] Among them, the surface stoplog gate water intake scheme best meets the requirements of surface water intake, that is, a stoplog type water retaining gate is arranged behind the full-height trash rack, and the top of the stoplog type water retaining gate is located at a position that meets the requirements of the power generation water intake for flow passing. The stoplogs are taken and placed one by one according to the change of the reservoir water level. However, due to the limitations of the transportation, manufacturing and installation conditions of the stoplog gate, the height of each stoplog cannot be too small, usually about 3 m. There is still a situation where the water intake depth exceeds the requirement of the diverted flow after the whole bottom stoplog is lifted, and the operation frequency is high and the manual workload is large. Summary of the Invention

[0005] The present application provides a water retaining gate, specifically a hydraulically driven hinge type water retaining gate, which solves the problems of high operation frequency, large manual workload, and inability to autonomously adapt to water level changes after a water retaining gate is adopted at the power generation water intake. The present application includes the following embodiments:

[0006] Embodiment 1. A water retaining gate, which comprises: at least one (for example, at least two, for example, at least three) louver units stacked, and the louver unit comprises: a support frame, at least one louver door, the louver door is rotatably connected to the support frame through a rotating shaft and a bearing, and the louver door is eccentrically arranged with the rotating shaft, so that it can be automatically closed under the action of underwater and gravity, a torque transmission device, the torque transmission device is fixedly connected with the louver door, a floating box, the floating box has a torque chute, and at least two floating box guide wheels fixedly connected with the floating box, which are connected with an external guide rail, so as to limit the movement direction of the floating box, and the floating box can move along the guide rail under the action of buoyancy of water and its own gravity, so that the torque transmission device contacts the torque chute to generate torque and transmits the torque to the louver door to open the louver door.

[0007] Embodiment 2. The water retaining gate according to Embodiment 1, wherein the torque transmission device is an elbow arm device, which comprises a first elbow arm, a first elbow arm guide wheel connected to the first elbow arm, a second elbow arm, and a second elbow arm guide wheel connected to the second elbow arm, and the first elbow arm and the second elbow arm form a certain angle, the angle is greater than or equal to 30° and less than or equal to 150°, for example, between 45° and 135°, for example, between 80° and 100°.

[0008] Embodiment 3. The water retaining gate according to Embodiment 1, wherein the torque transmission device is fixedly connected or integrally formed with the rotating shaft, so as to be fixedly connected with the louver door.

[0009] Embodiment 4. The water retaining gate according to Embodiment 1, wherein the height of the torque chute is greater than or equal to the height of 2 louver doors, so as to be able to open multiple louver doors simultaneously.

[0010] Embodiment 5. The water retaining gate according to Embodiment 1, wherein the floating box is a sealed box structure, and a sealed chamber and a ballast chamber are arranged from top to bottom.

[0011] Embodiment 6. The water retaining gate according to Embodiment 1, wherein the louver unit comprises at least 2, for example, at least 3, for example, at least 4 louver doors.

[0012] Embodiment 7. The water retaining gate according to Embodiment 1, wherein the support frame is composed of a top beam, a bottom beam and side beams, and the support frame is stacked in a gate slot.

[0013] Embodiment 8. The water retaining gate according to Embodiment 7, which further comprises a support rail, the support rail is arranged in the gate slot, and the support frame contacts the support rail through the side beam, so as to transmit the load from the louver door to the support rail.

[0014] Embodiment 9. The water retaining gate according to Embodiment 7, wherein the guiding track is installed in the gate slot.

[0015] Embodiment 10. A power generation water inlet of a high dam, which comprises the water retaining gate according to any one of Embodiments 1 to 9.

[0016] In the technical solution of the present application, through the shutter door and the rotating shaft arranged eccentrically, the shutter door is kept closed. When the floating box moves along the guiding track, torque is generated by the contact between the torque transmission device fixedly connected to the shutter door and the torque chute arranged on the floating box, and the torque is transmitted to the shutter door, so that the shutter door is opened, thereby realizing power-free automatic surface water intake for power generation. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present disclosure and do not limit the present disclosure.

[0018] Figure 1 Shows the shutter unit structure of Embodiment 1;

[0019] Figure 2 Shows the connection structure between the shutter door and the torque transmission device in Embodiment 1;

[0020] Figure 3 Shows the cross-sectional schematic diagram of the shutter door and the rotating shaft in Embodiment 1;

[0021] Figure 4 Shows the structure of the torque transmission device in Embodiment 1;

[0022] Figure 5 Shows the top view of the water retaining gate in Embodiment 1;

[0023] Figure 6 Shows the working cycle schematic diagram of a single shutter door when the floating box sinks in Embodiment 1;

[0024] Figure 7 Shows the working cycle schematic diagram of a single shutter door when the floating box floats in Embodiment 1;

[0025] Figure 8 Shows the schematic diagram of the water retaining gate arranged at the water inlet of a high dam reservoir in Embodiment 1.

[0026] Reference Numerals: 100 - louver unit, 110 - supporting frame, 111 - top beam, 112 - bottom beam, 113 - side beam, 120 - louver door, 130 - rotating shaft, 140 - bearing, 150 - torque transmission device, 151 - first crank arm, 152 - first crank arm guide wheel, 153 - second crank arm, 154 - second crank arm guide wheel, 200 - floating box, 210 - torque chute, 220 - floating box guide wheel, 300 - guiding track, 400 - supporting track, 500 - concrete for gate slot, 600 - trash rack. Detailed Embodiment

[0027] To make the objectives, technical solutions and advantages of the embodiments of the present disclosure clearer, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are some but not all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0028] The present application discloses a water retaining gate, which includes: at least one louver unit stacked, and the louver unit includes: a supporting frame, at least one louver door, the louver door is rotatably connected to the supporting frame through a rotating shaft and a bearing, the louver door is eccentrically arranged with the rotating shaft so as to be automatically closed under the action of water and gravity, a torque transmission device, the torque transmission device is fixedly connected to the louver door, a floating box, the floating box has a torque chute, at least two floating box guide wheels fixedly connected to the floating box, which are connected to an external guiding track, thereby restricting the movement direction of the floating box, and the floating box can move along the guiding track under the action of the buoyancy of water and its own gravity, so that the torque transmission device contacts the torque chute to generate torque and transmits the torque to the louver door to open the louver door.

[0029] In this application, the eccentric setting means that the torques on both sides of the rotating shaft are unbalanced, which can be achieved by setting different weights on both sides of the rotating shaft. For example, when the density of the louvers is the same, the rotating shaft is not set in the middle, or heavy objects are added to the louvers on one side of the rotating shaft. There are no special restrictions on the size of the louver door, and those skilled in the art can design it according to requirements. For example, the length is from 1 meter to 6 meters, such as from 2 meters to 5 meters, such as from 3 meters to 4 meters, such as from 3.2 meters to 3.8 meters, and the height is from 0.3 meters to 2 meters, such as from 0.5 meters to 1.5 meters, such as from 0.7 meters to 1.2 meters, such as from 0.9 meters to 1 meter. The louver door can be set to be hollow, and the rotating shaft can penetrate the louver door or be only set at both ends respectively, so that the louver door rotates around the rotating shaft within the support frame structure. Through the eccentric setting of the louver door and the rotating shaft, the louver door can maintain the automatically closed state whether underwater or above water. This can be designed by those skilled in the art according to needs.

[0030] In this application, the floating box is a box body that floats on the surface water relying on buoyancy and its own gravity, and its function is to use the ballast to provide the driving force for the rotation of the louver door. When the water level changes, the floating box moves along the guiding track, and through the stacked arrangement of the louver units, torque is generated at the place where the torque transmission device contacts the torque chute, causing the louver door to open, while at the place where the torque transmission device does not contact outside the torque chute, the louver door remains closed, thus realizing automatic surface water intake for power generation.

[0031] In this application, there is no specific limitation on the way the torque transmission device "contacts" the torque chute to generate torque, as long as an interaction force is generated on the contact surface between the torque transmission device and the torque chute to apply a torque to the torque transmission device to keep the louver door in the open state. For example, during the upward movement of the floating box, the torque chute generates an upward rotational torque on the torque transmission device, and the torque transmission device transmits this torque to the louver door, and the louver door accordingly remains open. During the downward movement of the floating box, the torque chute generates a downward rotational torque on the torque transmission device, and the torque transmission device transmits this torque to the louver door, and the louver door accordingly remains open in the opposite direction. A transition section is provided at the upper or lower part of the first chute. As the floating box moves, the transition section contacts the torque transmission device and causes it to rotate. As the floating box continues to move, the rotation angle of the torque transmission device further increases. The torque transmission device disengages from the transition section and enters the torque chute, and slides in the torque chute while maintaining the louver door in the open state. For example, the transition section is set as an inclined chute, and the torque chute is a vertical chute. As the floating box moves, the torque transmission device first contacts the inclined chute, and the inclined chute can provide a component force in the tangential direction of the rotation arc to the torque transmission device. As the floating box further moves to drive the louver door to rotate, when the louver door is fully open, the torque transmission device enters the vertical chute, that is, the torque chute, and slides in the torque chute while maintaining the louver door in the open state. The setting of the transition section can be designed by those skilled in the art according to needs.

[0032] In this application, there is no limitation on the specific structure of the torque transmission device. Those skilled in the art can independently design various forms of the torque transmission device according to the content disclosed in this application. In some embodiments, the torque transmission device is an elbow arm device, including a first elbow arm, a first elbow arm guide wheel connected to the first elbow arm, a second elbow arm, and a second elbow arm guide wheel connected to the second elbow arm. The arrangement of the elbow arm device enables the floating box to generate torque when moving in different directions. For example, when the floating box moves downward along the guiding track, the first elbow arm contacts the torque chute through the first elbow arm guide wheel to generate a downward torque, and the louver door remains open; when the floating box moves upward along the guiding track, the second elbow arm contacts the torque chute through the second elbow arm guide wheel to generate an upward torque, and the louver door remains open. With such an arrangement, when the water level rises or falls, the floating box can drive the louver door to rotate and open, and after the floating box passes, the louver door closes naturally. The first elbow arm and the second elbow arm form a certain angle, which is greater than or equal to 30° and less than or equal to 150°, for example, between 45° and 135°, for example, between 80° and 100°, so that when the floating box moves in different directions, both the first elbow arm and the second elbow arm can contact the chute and have sufficient torque, and drive the louver door to generate a sufficient deflection angle, for example, deflected by 60° to 120°, for example, deflected by 80° to 100°, for example, deflected by 90°. In some embodiments, a certain angle is formed between the first elbow arm and the second elbow arm and the louver door. The angle formed between the first elbow arm and the louver door is called the first elbow arm angle, and the angle formed between the second elbow arm and the louver door is called the second elbow arm angle. The first elbow arm angle and the second elbow arm angle are each independently greater than or equal to 30 degrees and less than or equal to 90 degrees, for example, greater than or equal to 40 degrees and less than or equal to 80 degrees, for example, greater than or equal to 40 degrees and less than or equal to 60 degrees, for example, 45 degrees.

[0033] In some embodiments, the torque transmission device is fixedly connected or integrally formed with the rotating shaft, so as to be fixedly connected with the louver door, and can transmit torque well to drive the louver door structure.

[0034] In some embodiments, the height (i.e., length) of the torque chute is greater than or equal to twice the height of a louver door, so as to be able to open multiple louver doors simultaneously. The height of the torque chute determines the number of opened louver doors. The number of opened louver doors below the water surface determines the water intake depth. Those skilled in the art can determine the number of opened louver doors according to the power generation water diversion requirements, and correspondingly set the height of the torque chute to conveniently adjust the automatic water output.

[0035] In some embodiments, the floating box is a sealed box structure, and a sealed chamber and a ballast chamber are arranged from top to bottom. Its function is to utilize buoyancy and ballast to provide the driving force for the deflection of the louver door.

[0036] In some embodiments, the louver unit includes at least 2, for example at least 3, for example at least 4 louver doors.

[0037] In some embodiments, the support frame is composed of a top beam, a bottom beam and side beams, and the support frame is stacked in the gate slot. The support frame is usually of a frame structure, with the top beam and the bottom beam arranged horizontally, and two side beams arranged vertically on both sides, all of which are channel steel cross-sections. The force-bearing structure of the side beam is in the form of a simply supported beam that receives concentrated loads from the louver doors at multiple points, and its cross-section should meet the requirements of strength, stiffness and stability; the top beam and the bottom beam play the role of connecting and fixing the side beams. Since they span the orifice, their cross-sections should minimize the water-blocking area as much as possible. A lifting hole suitable for being grabbed by a grab beam can also be provided at the upper end of the side beam. To prevent the support frame from moving laterally, a stop plate is provided on the side beam. The height H of the side beam b =n×h B +B d +B b +C0, where n is the number of louver doors in a single frame; h B is the height of a single louver door; B d is the flange width of the bottom beam; B b is the flange width of the top beam; C0 is the increase in the side beam height considering the lifting hole.

[0038] In some embodiments, the water-blocking gate further includes a support track, the support track is arranged in the gate slot, and the support frame contacts the support track through the side beam, so as to transfer the load from the louver door to the support track.

[0039] In some embodiments, the guide track is installed in the gate slot. The guide track is buried in the gate slot concrete, and by restricting the floating box guide wheels installed on the floating box, it is achieved that the floating box can only move up and down along the track with the water level without lateral displacement or overturning. At the same time, the displacement of the louver door frame is restricted, and the horizontal load of the louver door frame is transferred to the gate slot concrete.

[0040] On the other hand, the present application discloses a power generation water inlet of a high dam, which includes the water-blocking gate described in any of the above embodiments.

[0041] The above-mentioned ranges can be used alone or in combination. Through the following embodiments, the present application can be more easily understood. Embodiment

[0042] This embodiment provides a water-blocking gate, which includes stacked louver units 100 and floating boxes 200.

[0043] As shown Figure 1 in the figure, the louver unit 100 includes a support frame 110 and four louver doors 120. The support frame 110 includes a top beam 111, a bottom beam 112, and side beams 113.

[0044] As shown Figure 2 in the figure, the louver door 120 is rotatably connected to the support frame 110 through a rotating shaft 130 and a bearing 140, and the rotating shaft 130 is also fixedly connected to a torque transmission device 150.

[0045] Figure 3 The cross-sectional schematic diagram of the louver door and the rotating shaft is shown. The louver door 120 is a welded structural member with an oblong hole cross-section, and reinforcing ribs are provided at both ends inside. The rotating shaft 130 is arranged at the geometric center of the louver door 120 and is eccentrically arranged by setting a heavy object at one end inside the louver door 120, so that the louver door can automatically close both underwater and above the water surface.

[0046] Figure 4 The structure of the torque transmission device 150 is shown. The torque transmission device 150 is an articulated arm device, including a first articulated arm 151, a first articulated arm guide wheel 152 connected to the first articulated arm 151, a second articulated arm 153, and a second articulated arm guide wheel 154 connected to the second articulated arm 153. A 90° angle is formed between the first articulated arm 151 and the second articulated arm 153.

[0047] As shown Figure 5 in the figure, the floating box 200 is a sealed box structure formed by welding, with a rectangular cross-section. The box body is divided into a sealed chamber and a ballast chamber (not shown in the figure) from top to bottom. It is connected to the guide rail 300 through two fixedly connected floating box guide wheels 220. The guide rail 300 is buried in the gate slot concrete 500, so that the floating box 200 moves along the guide rail 300 with the rise and fall of the water level without lateral displacement or overturning. A torque chute 210 is provided on the side of the floating box 200. When the floating box 200 moves along the guide rail 300, the torque transmission device 150 contacts the torque chute 210 to generate torque and transmits the torque to the louver door 120 to keep the louver door 120 open. The torque can be the upward torque generated when the floating box 200 moves upward along the guide rail 300, or the downward torque generated when the floating box 200 moves downward along the guide rail 300. A support rail 400 is also buried in the gate slot concrete 500, and the load transmitted from the louver door 120 is transmitted to the support rail 400 through the side beam.

[0048] The working cycle principle of a single louver door 120 when the floating box 200 sinks is shown in Figure 6, when the water level drops, the floating box 200 sinks with the water level at this time. The torque chute applies torque to the first crank arm to keep the louver door open. The louver door that has disengaged from the torque chute at the upper part deflects to the closed state under its own weight.

[0049] The working cycle principle of a single louver door 120 when the floating box 200 floats is shown in Figure 7 , when the water level rises, the floating box 200 floats with the water level at this time. The torque chute applies torque to the second crank arm to keep the louver door open in the opposite direction. The louver door that has disengaged from the torque chute at the lower part deflects to the closed state under the combined action of its own weight and buoyancy.

[0050] As Figure 8 shown, the water retaining gate is usually arranged downstream of the trash rack 600 at the power generation intake. The segmented louver units are placed into the gate slot at one time and sink underwater. The louver doors 120 arranged in the frame automatically turn to the closed state under the combined action of buoyancy and self-weight. The distance between the gate slot of the trash rack 600 and the gate slot of the louver door 120 should ensure that there is no interference with the trash rack 600 when the louver door 120 is in the fully open position. The height of the floating box chute determines the number of opened louver doors 120. The number of opened louver doors 120 should be determined according to the water diversion flow rate, and thus the length of the floating box chute is determined. Considering the maintenance conditions of the louver door 120 and the trash rack 600, sufficient maintenance slots should be reserved at appropriate positions. At the same time, lifting equipment for lifting the trash rack 600 and the louver door 120 should be considered.

[0051] When the floating box is placed into the water along the gate slot, under the action of its own weight and ballast, the floating box sinks. At the same time, the floating box chute drives the swing arm to rotate and opens the louver doors in sequence. When the floating box sinks to a certain depth, the buoyancy of the floating box is greater than the sum of its own weight and ballast, and the floating box will hover. At this time, the louver doors within the height range of the floating box chute are all in the open state, and the remaining louver doors are in the closed state. Water flows in through the opened louver doors.

[0052] The effect of the technical solution of the present invention is that in the power generation intake of a high dam and large reservoir, it is possible to automatically take surface water for power generation, solving the problems in the prior art such as high operation frequency, large manual workload, and inability to be automated after using a water retaining gate.

[0053] The above description is only an exemplary embodiment of the present disclosure and is not used to limit the protection scope of the present disclosure. The protection scope of the present disclosure is determined by the appended claims.

Claims

1. A water retaining gate, comprising: At least one louver unit arranged in a stack, and the louver unit includes: A support frame; At least one louver door, which is rotatably connected to the support frame through a rotating shaft and a bearing, and the louver door is eccentrically arranged with the rotating shaft, so that it can be automatically closed under the action of underwater and gravity; A torque transmission device, which is fixedly connected to the louver door; A floating box, which has a torque chute; and At least two floating box guide wheels fixedly connected to the floating box, which are connected to an external guide track, thereby restricting the movement direction of the floating box, The floating box can move along the guide track under the action of buoyancy of water and its own gravity, so that the torque transmission device contacts the torque chute to generate torque, and transmits the torque to the louver door to open the louver door. When the water level changes, the floating box moves along the guide track. Through the stacked arrangement of the louver units, torque is generated at the place where the torque transmission device contacts the torque chute to open the louver door, while at the place where the torque transmission device does not contact outside the torque chute, the louver door remains closed, thereby realizing automatic surface water intake power generation. Wherein, the torque transmission device is an elbow arm device, including a first elbow arm, a first elbow arm guide wheel connected to the first elbow arm, a second elbow arm, and a second elbow arm guide wheel connected to the second elbow arm. The first elbow arm and the second elbow arm form a certain angle, and the angle is greater than or equal to 30° and less than or equal to 150°. The torque transmission device is fixedly connected or integrally formed with the rotating shaft, so as to be fixedly connected to the louver door. The height of the torque chute is greater than or equal to the height of 2 louver doors, so as to be able to open multiple louver doors simultaneously. The floating box is a sealed box structure, and a sealed chamber and a ballast chamber are arranged from top to bottom. The support frame is composed of a top beam, a bottom beam and side beams, and the support frame is stacked in a gate slot. The water retaining gate further includes a support track, the support track is arranged in the gate slot, and the support frame contacts the support track through the side beams, so as to transfer the load transmitted by the louver door to the support track.

2. The water retaining gate according to claim 1, wherein the louver unit includes at least 2 louver doors.

3. The water retaining gate according to claim 1, wherein the guide track is installed in the gate slot.

4. The water retaining gate according to claim 1, which includes at least two louver units arranged in a stack.

5. The water retaining gate according to claim 1, the angle formed by the first elbow arm and the second elbow arm is 45° to 135°.

6. The water retaining gate according to claim 5, the angle formed by the first elbow arm and the second elbow arm is 80° to 100°.

7. The water retaining gate according to claim 1, wherein the louver unit includes at least 3 louver doors.

8. The water retaining gate according to claim 1, wherein the louver unit includes at least 4 louver doors.

9. A power generation water inlet of a high dam, which includes the water retaining gate according to any one of claims 1 to 8.

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