Layered water intake water shut-off device

Abstract

The application discloses a layered water intake water gate device in the technical field of water conservancy and hydropower engineering. The device comprises a gate groove and a gate beam, the gate beam can slide up and down along the gate groove, a plurality of gate beams are arranged in the extension direction of the gate groove, flexible gate leaves are connected between adjacent gate beams, a traction member is further arranged between the adjacent gate beams, the traction member has an extendable and stackable state in the vertical direction, the traction member is stacked when the adjacent gate beams are stacked, and the traction member is stretched when the adjacent gate beams are away from each other; the traction member has an upper limit of stretching, so as to limit the farthest distance between the adjacent gate beams, and when the traction member is stretched to the longest state, the size of the traction member in the vertical direction is smaller than the size of the corresponding flexible gate leaf in the vertical direction when the flexible gate leaf is laid flat, so as to reduce the tension of the flexible gate leaf. When the gate beam is lifted upward, the tension in the vertical direction is mainly borne by the traction member, so that the tension of the flexible gate leaf is reduced, and at this time, the flexible gate leaf can be thinner and more flexible mainly based on the folding requirement.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering technology, specifically to a stratified water intake barrier device. Background Technology

[0002] After a reservoir is built, it reduces the flow velocity of the water within the reservoir. Most reservoirs exhibit temperature stratification, which is particularly pronounced in high-dam, large reservoirs. The impact of reservoirs on water temperature has become a hot topic in river water environment protection. Ensuring a reasonable downstream water temperature during reservoir operation is a crucial measure for protecting the downstream river's aquatic ecosystem. To mitigate the adverse effects of water resource development and utilization on watershed ecosystems and maintain the health and sustainable development of river ecosystems, various countries have conducted research on reservoir engineering and non-engineering ecological regulation measures. These studies aim to optimize the allocation of water resources through reservoir scheduling to meet the health and stability requirements of river ecosystems.

[0003] Currently, the main measures adopted to mitigate the adverse effects of downstream water temperature on the aquatic environment include: water conservancy and ecological regulation, artificial disruption of the reservoir's water temperature stratification structure, and stratified water intake. For stratified water intake in reservoirs, the common practice in China is to install stacked beam gates or multi-layered intake channels at the intake or water outlet. Stacked beam gates are more widely used, especially in high-dam, large-reservoir hydropower projects, such as the Baihetan, Xiluodu, and Jinping I hydropower projects on the Jinsha River. Due to the large number of orifices, significant water level fluctuations, and large unit flow rates in existing large-scale hydropower projects in China, the controlled water depth at the top of the stacked beam gates is also relatively large. Therefore, the number of operations required for each layer of stacked beam gates is high, and the lifting height is also significant. Taking the Xiluodu hydropower station on the Jinsha River as an example, if the same layer of stacked beam gates is removed from the orifice, 90 gate sections need to be removed, requiring up to 90 operations, making the operation cumbersome and time-consuming. For stratified water intake technology with multiple intakes, multiple intake channels need to be set up sequentially from top to bottom along the water flow direction. Each channel has a gate, and the gates in each channel are controlled by opening and closing equipment. Since the gates in each channel need to be staggered in the direction of water flow, this increases the length of the intake in the direction of water flow. It is generally suitable for reservoirs with shallow water intake depth. Otherwise, the investment will be much higher due to the excessive length of the intake. Although it can achieve water intake in a certain range, the time for opening and closing the gates is still long and the operating efficiency is low.

[0004] To address the aforementioned issues, patent application number 202410554662.7 discloses a layered water intake barrier device with freely adjustable water intake location, depth, and opening degree. The barrier assembly comprises multiple frame beams spaced apart sequentially along the sliding direction. These frame beams slide in conjunction with a door groove structure, and flexible door leaves connect adjacent frame beams. The barrier assembly, i.e., the aforementioned multiple frame beams (hereinafter referred to as door beams), can be stacked vertically along the guide groove under its own weight.

[0005] Based on the application requirements of flexible gate leaves in tiered water intake barrier devices for folding and water sealing, patent application number 202620296959.2 discloses a curtain structure for tiered water intake barrier devices. The curtain structure includes a curtain, horizontal ribs, vertical flat strips, end edging, and flexible waterstops. The main function of the curtain is to separate the upstream and downstream water. Horizontal ribs are set on the curtain, and the horizontal ribs have a certain rigidity to stretch the curtain horizontally, so that the flexible waterstops at the ends fit against the gate pier side wall.

[0006] In the above technical solution, the flexible door leaf not only has to withstand the water pressure from upstream to downstream, but also connects the adjacent door beams above and below, bearing the tensile force in the vertical direction. High requirements are placed on the strength, lateral rigidity, and end waterproofing structure of the flexible door leaf, often requiring a certain thickness. Furthermore, since the flexible door leaf is stacked with the door beams, there is also a folding requirement; a thicker leaf would be inconvenient for folding. Simultaneously, the curtain achieves waterproofing by adhering to the inner side of the sidewall, requiring not only high lateral rigidity of the curtain but also a specific shape. Summary of the Invention

[0007] To overcome the problems of inconvenience in setting up flexible door leaves in existing layered water intake barrier devices due to strength, rigidity, water-stopping requirements, and folding needs, this invention provides a layered water intake barrier device.

[0008] The technical solution adopted by this invention to solve its technical problem is: The layered water intake and water-tight gate device includes a gate groove and a gate beam. The gate groove extends vertically, and the gate beam can slide vertically along the gate groove. Multiple gate beams are provided in the extension direction of the gate groove, and flexible gate leaves are connected between adjacent gate beams. It also includes a traction member, which is connected between adjacent gate beams. The traction member has an extendable and stackable state in the vertical direction. When adjacent gate beams are stacked, the traction member is stacked; when adjacent gate beams are far apart, the traction member extends. The traction member has an upper limit to limit the farthest distance between adjacent gate beams. When the traction member is extended to its longest state, the vertical dimension of the traction member is smaller than the vertical dimension of the corresponding flexible gate leaf when it is laid flat, so as to reduce the tension on the flexible gate leaf.

[0009] In this application, by setting a traction component, when the door beam is lifted upward, the traction component mainly bears the vertical tension, thereby reducing the tension on the flexible door leaf. At this time, the flexible door leaf can be made thinner and more flexible mainly based on folding requirements.

[0010] In some embodiments, with the upstream side of the gantry beam as the front and the downstream side as the rear, the traction member is connected to the middle of the gantry beam in the front-rear direction, and the flexible door leaf is connected to the downstream side of the gantry beam.

[0011] In some embodiments, the portal beam includes a main beam in the middle and side beams fixedly disposed at both ends of the main beam. The vertical dimension of the side beams is larger than that of the main beam, such that when the side beams of adjacent portal beams come into contact, the main beams do not come into contact.

[0012] In some embodiments, the flexible door leaf is fixed to the side beam, and the left and right ends of the flexible door leaf between adjacent side beams adopt a tightening structure to achieve adaptive tightening.

[0013] In some embodiments, in the front-rear direction, the upper end face of the main beam is configured to extend obliquely outward from the center; or the traction member is a canvas, the lower end of which is covered by the canvas covering the upper end face of the main beam below the traction member, and when the traction member is extended, the canvas above the upper end face of the main beam extends obliquely outward from the center under the action of tension.

[0014] In some embodiments, on the downstream side of the door beam, the end of the door slot facing the door beam is configured as a curved structure; in this embodiment, the flexible door leaf bulges downstream under water pressure and abuts against the curved structure at the end of the door slot.

[0015] In some embodiments, the curved structure of the door groove facing the door beam is made of stainless steel, and the corresponding position of the flexible door leaf is provided with friction-reducing material.

[0016] In some embodiments, the traction element is one or more of a canvas, sling, rope, chain, or retractable structure.

[0017] In some embodiments, the uppermost door beam is provided with two lifting lugs, which are symmetrically distributed on the left and right sides of the door beam.

[0018] In some embodiments, the traction components are symmetrically distributed on the left and right sides of the portal beam.

[0019] The beneficial effects of this invention are: By setting up a traction component, when the door beam is lifted upwards, the traction component mainly bears the vertical tension, thereby reducing the tension on the flexible door leaf. At this time, the flexible door leaf can be made thinner and more flexible mainly based on the needs of water sealing and folding. The flexible door leaf is a single piece of curtain, with the left and right ends connected to the side beams. The flexible door leaf has a large left and right dimension so that it can bulge downstream under the action of the water level difference between the upstream and downstream, presenting the shape of a left and right catenary. It fits into the arc section of the door groove for water sealing. Water pressure can be used to press the flexible door leaf onto the door groove for water sealing, which improves the water sealing effect. The contact area between the flexible door leaf and the door groove is made of friction-reducing materials such as polytetrafluoroethylene, while the door groove is made of stainless steel, which reduces the frictional resistance between the flexible door leaf and the door groove. Attached Figure Description

[0020] Figure 1 A schematic diagram illustrating an implementation scenario of the layered water intake barrier device provided by the present invention; Figure 2 for Figure 1 A partial sectional view from the side; Figure 3 for Figure 1 A top-view sectional view of the joint between the door groove and the door beam; Figure 4 A front view of the unfolded state of the gate beam in the layered water intake barrier device provided by the present invention; Figure 5 for Figure 4 Side view of the main beam section of the central portal beam and the traction component in their unfolded state; Figure 6 for Figure 4 Side view of the deployed state of the central gate beam, side beam section, traction component, and flexible gate leaf; Figure 7 A front view of the stacked state of the gate beams in the layered water intake barrier device provided by the present invention; Figure 8 for Figure 7 Side view of the stacked state of the main beam section of the central portal beam and the traction component; Figure 9 for Figure 7 Side view of the stacked state of the central portal beam, side beams, traction components, and flexible portal leaves.

[0021] The markings in the diagram are: 1-fixed winch type gate opener, 2-lifting lug, 3-gate beam, 4-traction component, 5-flexible gate leaf, 6-gate slot, 7-curved surface structure, 8-main beam, 9-side beam, 10-tightening structure. Detailed Implementation

[0022] The invention will be further described below with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0024] like Figures 1-9 As shown, this invention provides a layered water intake barrier device. Wherein... Figures 1-3 A schematic diagram illustrating the implementation scenario of the tiered water intake barrier device is shown. Figures 4-6 This shows a schematic diagram of the unfolded state of the portal beam 3; Figures 7-9 The diagram shows the stacked state of the three door beams.

[0025] The layered water intake barrier device includes a door groove 6 and a door beam 3. The door groove 6 extends vertically, and the door beam 3 can slide vertically along the door groove 6. Multiple door beams 3 are provided in the extension direction of the door groove 6. Flexible door leaves 5 are connected between adjacent door beams 3. The device also includes a traction member 4, which is connected between adjacent door beams 3. The traction member 4 has an extendable and stackable state in the vertical direction. When adjacent door beams 3 are stacked, the traction member 4 is stacked. When adjacent door beams 3 are far apart, the traction member 4 extends. The traction member 4 has an upper limit to limit the farthest distance between adjacent door beams 3. When the traction member 4 is extended to its longest state, the vertical dimension of the traction member 4 is smaller than the vertical dimension of the corresponding flexible door leaf 5 when it is laid flat, so as to reduce the tension on the flexible door leaf 5.

[0026] In this application, by setting the traction member 4, when the door beam 3 is lifted upward, the traction member 4 mainly bears the vertical tension, thereby reducing the tension on the flexible door leaf 5. At this time, the flexible door leaf 5 can be made thinner and more flexible mainly based on the folding requirements.

[0027] The traction component 4 here is vertically extendable and stackable, meaning that the shape of the traction component 4 changes, causing its vertical dimensions to change, thereby enabling the upper door beam 3 to pull the lower door beam 3 through the traction component 4. The traction component 4 can be a flexible object such as canvas, webbing, or rope for extending and opening; or a rigid but stackable object such as a chain; or a retraction mechanism, such as a telescopic structure composed of multiple telescopic joints or a spring-driven shaft rotation for tightening. In this embodiment, the traction component 4 is canvas.

[0028] In this invention, the flexible door leaf 5 is made of a material with good flexibility, extensibility, waterproofness and foldability, such as high-strength waterproof canvas made of nylon, PVC coated cloth and other materials.

[0029] Combination Figure 2 and Figure 3 In this embodiment, the upstream side of the door beam 3 is taken as the front and the downstream side as the rear. The traction member 4 is connected to the middle part of the door beam 3 in the front-rear direction, and the flexible door leaf 5 is connected to the downstream side of the door beam 3.

[0030] Since the flexible door leaf 5 is tensioned downstream under water pressure, it is preferable that the flexible door leaf 5 be located on the downstream side to avoid interference with other structures (such as the traction member 4) and to facilitate sealing using water pressure. The traction member 4 is preferably located in the middle of the front-to-back direction to facilitate balanced tension.

[0031] Combination Figure 4 and Figure 7 In this embodiment, the door beam 3 includes a main beam 8 in the middle and side beams 9 fixedly disposed at both ends of the main beam 8. The vertical dimension of the side beams 9 is larger than that of the main beam 8, so that when the side beams 9 of adjacent door beams 3 come into contact, the main beams 8 do not come into contact.

[0032] Reference Figure 4 The central lintel 3 is generally symmetrically distributed in the vertical direction with the side beams 9. Obviously, the bottom of the side beams 9 in the bottommost lintel 3 should be aligned with the main beam 8 to prevent water from passing through.

[0033] As configured above, when adjacent door beams 3 are stacked, there is a gap in between to allow the traction component 4 to make room when the door beams 3 are stacked. (And refer to...) Figure 3 The two side beams 9 are respectively matched with the door groove 6. If the side beam 9 is smaller in size along the door groove direction, the guide devices arranged on it are closer together, which can easily cause self-locking. In this application, the side beam 9 is larger in size along the door groove direction than the main beam 8, which can avoid self-locking.

[0034] In this embodiment, the flexible door leaf 5 is fixed on the side beam 9, and the left and right ends of the flexible door leaf 5 between adjacent side beams 9 adopt a tightening structure 10 to achieve adaptive tightening.

[0035] In practice, the main beam 8 is preferably fixedly connected to the corresponding area of ​​the flexible door leaf 5 through a horizontal arc-shaped skirt.

[0036] In practice, the tightening structure 10 here can be based on materials, such as the elasticity of the flexible door leaf 5 body; or it can be based on external drives, such as external pneumatic or electric drives. In this embodiment, the left and right ends of the flexible door leaf 5 adopt a tightening mechanism in the form of elastic bands to achieve adaptive tightening.

[0037] Reference Figure 5 In this embodiment, the traction member 4 is a canvas. The lower end of the canvas wraps around the upper end surface of the main beam 8 below the traction member 4. When the traction member 4 is extended, the canvas above the upper end surface of the main beam 8 extends obliquely outward from the middle under the action of tension.

[0038] With this configuration, the canvas wraps around the upper surface of the main beam 8, and there is some redundancy. This allows the canvas on the upper surface of the main beam 8 to extend diagonally outward from the middle when the traction component 4 pulls it up, preventing garbage in the water from accumulating on the main beam 8 and affecting the reliability of the device.

[0039] In some other embodiments, when the traction member 4 is not made of canvas, such as a chain, the connection with the lower main beam 8 is mainly a point connection. In this case, it is preferable that the upper surface of the main beam is configured to extend obliquely outward from the middle in the front-rear direction to achieve the aforementioned effect.

[0040] In this embodiment, the traction component 4 is a canvas. In some other embodiments, the traction component 4 is not a canvas. In this case, the canvas can also be used to wrap the upper surface of the main beam 8, and there is some redundancy so that when the traction component 4 is pulled up, the canvas on the upper surface of the main beam 8 extends obliquely outward from the middle, so as to avoid the accumulation of garbage in the water on the main beam 8 and affect the reliability of the device.

[0041] Reference Figure 3 In this embodiment, on the downstream side of the door beam 3, the end of the door groove 6 facing the door beam 3 is set as a curved structure 7; in practice, the flexible door leaf 5 bulges downstream when subjected to water pressure and abuts against the curved structure 7 at the end of the door groove 6.

[0042] Given that the door groove 6 and the door beam 3 are matched, the curved structure 7 in this figure should be distributed on the inner side of the two end beams 9 so that under the action of water pressure, the flexible door leaf 5 will bulge and abut against the curved structure 7 to achieve a tight fit and water stop.

[0043] Obviously, the left and right dimensions of the flexible door leaf 5 after unfolding should be greater than the distance between the two end beams 9, so that the flexible door leaf 5 can bulge downstream under the action of the water level difference between the upstream and downstream, so as to fit the curved surface structure 7 at the end of the door groove 6.

[0044] Furthermore, the curved structure 7 of the door groove 6 facing the door beam 3 is made of stainless steel, and the corresponding position of the flexible door leaf 5 is provided with friction-reducing material.

[0045] Friction between the flexible door leaf 5 and the door groove 6 can be reduced by coating or compounding with friction-reducing materials, thereby extending the service life of the device. Commonly used friction-reducing materials in practice include polytetrafluoroethylene coatings, graphite coatings, and ultra-high molecular weight polyethylene patches.

[0046] Reference Figure 1 In practice, a fixed winch-type gate opener 1 is used, and the lifting lugs 2 are connected by ropes to unfold or stack the gate beam 3. In this embodiment, two lifting lugs 2 are provided at the uppermost end of the gate beam 3, and the two lifting lugs 2 are symmetrically distributed on the left and right sides of the gate beam 3.

[0047] In implementation, the preferred traction components 4 are symmetrically distributed on the left and right sides of the lintel 3. Here, the traction components 4 are a single unit, such as the canvas here, in which case the unit is symmetrically distributed on the left and right sides. If the traction components 4 include multiple components, such as multiple ropes, then the multiple traction components 4 are symmetrically distributed on the left and right sides.

[0048] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A layered water intake barrier device, comprising a door groove (6) and a door beam (3), wherein the door groove (6) extends vertically, the door beam (3) can slide vertically along the door groove (6), and multiple door beams (3) are provided in the extending direction of the door groove (6), and flexible door leaves (5) are connected between adjacent door beams (3), characterized in that, It also includes a traction member (4), and the traction member (4) is connected between adjacent door beams (3). The traction member (4) has an extendable and stackable state in the vertical direction. When adjacent door beams (3) are stacked, the traction member (4) stacks. When adjacent door beams (3) are far apart, the traction member (4) extends. The traction member (4) has an upper limit to limit the farthest distance between adjacent door beams (3), and when the traction member (4) is extended to its longest state, the vertical dimension of the traction member (4) is smaller than the vertical dimension of the corresponding flexible door leaf (5) when it is laid flat, so as to reduce the tension on the flexible door leaf (5).

2. The stratified water intake barrier device according to claim 1, characterized in that, With the upstream side of the gate beam (3) as the front and the downstream side as the back, the traction component (4) is connected to the middle of the gate beam (3) in the front-rear direction, and the flexible gate leaf (5) is connected to the downstream side of the gate beam (3).

3. The tiered water intake barrier device according to claim 2, characterized in that, The door beam (3) includes a main beam (8) in the middle and side beams (9) fixed at both ends of the main beam (8). The vertical dimension of the side beams (9) is larger than that of the main beam (8) in the vertical direction, so that when the side beams (9) of adjacent door beams (3) come into contact, the main beams (8) do not come into contact.

4. The stratified water intake barrier device according to claim 3, characterized in that, The flexible door leaf (5) is fixed on the side beam (9), and the left and right ends of the flexible door leaf (5) between adjacent side beams (9) adopt a tightening structure (10) to achieve adaptive tightening.

5. The tiered water intake barrier device according to claim 3, characterized in that, In the front-rear direction, the upper end face of the main beam (8) is configured to extend obliquely outward from the middle; Alternatively, the traction component (4) is made of canvas, with the lower end of the canvas covering the upper surface of the main beam (8) below the traction component (4), and when the traction component (4) extends, the canvas above the upper surface of the main beam (8) extends obliquely outward from the middle under the action of tension.

6. The stratified water intake barrier device according to claim 2, characterized in that, On the downstream side of the door beam (3), the end of the door groove (6) facing the door beam (3) is set as a curved structure (7). During implementation, the flexible door leaf (5) bulges downstream when subjected to water pressure and abuts against the curved structure (7) at the end of the door groove (6).

7. The tiered water intake barrier device according to claim 6, characterized in that, The curved structure (7) of the door groove (6) facing the door beam (3) is made of stainless steel, and the corresponding position of the flexible door leaf (5) is provided with friction-reducing material.

8. The stratified water intake barrier device according to claim 1, characterized in that, The traction component (4) is one or more of canvas, sling, rope, chain or take-up mechanism.

9. The stratified water intake barrier device according to claim 1, characterized in that, The top of the uppermost door beam (3) is provided with two hanging lugs (2), which are symmetrically distributed on the left and right sides of the door beam (3).

10. The stratified water intake barrier device according to any one of claims 1-9, characterized in that, The traction components (4) are symmetrically distributed on the left and right sides of the gantry beam (3).

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