Layered water intake gate with trash holding function
By designing a layered water intake gate with a dirt blocking function, using a single-section gate and an electric push rod to drive the guide vane mechanism, the problem of the limited number of layered water intake ports in the prior art is solved, and the effect of precisely controlling the depth of water intake and reducing head losses is achieved.
Patent Information
- Application Number
- CN202422441405.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-10
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-10-10
AI Technical Summary
Each water intake in the existing valve device needs to be equipped with independent dirt blocking devices and gates. The number of layered water intakes arranged in steps is limited, and the water intake depth cannot be accurately controlled, and there are additional head losses and construction difficulties.
A layered water intake gate with the function of intercepting pollution is designed, and several single-section gates are adopted. Each single-section gate includes the main frame, intercepting structure, driving structure and swing guide vane. The opening and closing of the swing guide vane is controlled by the electric push rod driving mechanism to achieve layered water intake. The gate strip replaces the original intercepting gate for intercepting pollution.
It realizes that there is no need to set up door troughs, which can accurately control the water intake depth and reduce head losses. It is suitable for layered water intake transformation of newly built and established power stations, saves civil construction volume, and can be installed and maintained using the original opening and closing equipment.
Smart Images
Figure CN223176676U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of metal structure equipment of water conservancy and hydropower engineering, and particularly relates to a layered water intake gate with a pollution blocking function. Background Art
[0002] After large hydropower stations begin to operate, water temperature stratification will occur in the reservoir area, with significant differences between the temperature of the water leaving the reservoir and the natural river channel. This low-temperature water, especially during the fish breeding season, can negatively impact the growth and reproduction of downstream fish. To obtain high-quality water, drinking water conservancy projects generally draw from medium- and deep-layer water of good quality.
[0003] Large hydropower stations typically install stoplog gates at the water inlet or install water-blocking curtains in front of the water inlet to prevent mid- and deep-layer water from entering the intake, where warmer surface water is drawn. This minimizes the impact of temperature fluctuations on downstream fish growth and reproduction. The stoplog gate solution requires a dedicated gate reservoir, typically operated by a gantry crane. Gate transfers are time-consuming and cannot be adjusted in real time based on water level conditions. Installing a water-blocking curtain in front of the water inlet is difficult to construct and install, and inconvenient to maintain. Both methods may generate additional head losses. For drinking water conservancy projects, multiple tiered intakes are typically installed to ensure high-quality water at different times. This approach requires independent pollution control devices and gates for each intake, resulting in extensive civil engineering and metal structure work. Furthermore, the number of tiered intakes is limited, and precise control of the water intake depth is impossible. Utility Model Content
[0004] The purpose of the utility model is to provide a stratified water intake gate with a pollution blocking function, which solves the problem that each water intake of the existing valve device needs to be equipped with an independent pollution blocking device and gate, the number of stratified water intakes arranged in stages is limited, and the water intake depth cannot be accurately controlled.
[0005] The technical solution adopted by the utility model is that the layered water intake gate with the pollution blocking function includes a plurality of single-section gates;
[0006] Each single-section gate includes a main frame, which is provided with main beams at the top and bottom of the main frame. The two main beams of the main frame are box-type structures. A pollution-blocking structure is welded between the two main beams on the water-facing side of the main frame. Side beams are provided on both sides of the main frame. Two reverse support devices are installed on the water-facing side of the side beams on both sides of the main frame. Two main support devices are installed on the backwater side of the side beams on both sides of the main frame. Drive structures are installed inside the two main beams of the main frame. Several swing guide vanes are commonly connected between the two drive structures. A water-stop device is installed on the backwater side of the main frame.
[0007] The utility model is also characterized in that:
[0008] The trash rack structure includes several bars, and both ends of each bar are welded to the main girders at the top and bottom of the main frame respectively.
[0009] The main support device adopts a rolling support type, and the reverse support device adopts a sliding support type. Arc stoppers are installed on the water-receiving sides of the two main girders of the main frame.
[0010] The side girders on both sides of the main frame are of box-type structures. Lifting lugs are arranged on the webs inside the side girders on both sides of the main frame, and two reinforcing steel pipes are symmetrically installed on the water-receiving side of the main frame.
[0011] The driving structure includes a guide vane driving mechanism, which is installed inside the two main girders of the main frame. The guide vane driving mechanism is of a gear-rack type. One end of the rack of the guide vane driving mechanism is connected to an electric push rod, and the electric push rod is fixedly connected inside the two main girders of the main frame.
[0012] Both ends of each swing guide vane extend into the inside of the main girders at the top and bottom of the main frame respectively. Gears are fixedly connected to both ends of the swing guide vane, and the two racks of the guide vane driving mechanisms are respectively engaged with the gears at both ends of each swing guide vane.
[0013] A sealing structure is installed at the connection between the swing guide vane and the main girder of the main frame.
[0014] The swing guide vane is located between the bars and the main frame, and the center line of the bars coincides with the projection of the center line of the swing guide vane in the water flow direction.
[0015] Each single-section gate is stacked vertically.
[0016] The water stop device can seal the gaps between the side girders on both sides of the main frame and the gate slot, and can also seal the gaps between the two main girders of the main frame and other single-section gates.
[0017] The beneficial effects of the present utility model are as follows:
[0018] The layered water intake gate with a trash rack function provided by the present utility model controls the rack in the guide vane driving mechanism to move in the direction perpendicular to the water flow by controlling the electric push rod, thereby driving the gears installed at the top and bottom of the swing guide vane, and further controlling the opening and closing of the swing guide vane to cut off the water flow passing through this single-section gate. Several gates are stacked along the gate slot direction. By controlling the opening of the swing guide vanes of one or several of the gates and closing the swing guide vanes of the remaining gates for layered water intake according to the above working principle, the problems that the number of layered water intake openings set in a stepped manner by the existing valve device is limited and the water intake depth cannot be accurately controlled are solved.
[0019] The layered water intake gate with a trash screening function provided by the present utility model does not require a dedicated gate slot to be set up. The originally designed trash rack slot serves as a guiding slot, and the grating bars in the device replace the original trash rack to perform the trash screening work, solving the problem that each water intake of the existing valve device needs to be equipped with an independent trash screening device and a gate. It is not only applicable to the layered water intake of newly built power stations, but also can be used for the transformation of the layered water intake of existing power stations. The original hoist equipment can be used for the installation and maintenance of the gate, saving a large amount of civil engineering construction volume.
[0020] For the layered water intake gate with a trash screening function provided by the present utility model, the projection shapes of the grating bars and the swing guide vanes coincide along the water flow direction, and no additional head loss will be caused. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] Figure 1 is a schematic structural diagram of the layered water intake gate with a trash screening function of the present utility model;
[0022] Figure 2 is the present utility model Figure 1 sectional view taken along line 1-1;
[0023] Figure 3 is an upstream view of the intermediate state during the opening and closing process of the swing guide vane of the present utility model;
[0024] Figure 4 is a downstream view of the present utility model;
[0025] Figure 5 is the present utility model Figure 3 top view;
[0026] Figure 6 is the present utility model Figure 3 sectional view taken along line 3-3;
[0027] Figure 7 is the present utility model Figure 3 sectional view taken along line 2-2 showing the fully open state of the swing guide vane;
[0028] Figure 8 is the present utility model Figure 3 sectional view taken along line 2-2 showing the fully closed state of the swing guide vane.
[0029] In the figures: 1, main frame; 2, reverse support device; 3, grating bars; 4, main support device; 5, electric push rod; 6, guide vane drive mechanism; 7, swing guide vane; 8, water stop device; 9, arc-shaped block; 10, reinforcing steel pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0030] The present utility model will be described in detail below in conjunction with the drawings and the detailed description of the embodiments.
[0031] The layered water intake gate with a trash screening function, such asFigure 1-2 As shown, it includes several single-section gates;
[0032] Such as Figure 3 As shown, each single-section gate includes a main frame 1. Main beams are provided at both the top and bottom of the main frame 1. Both main beams of the main frame 1 are box-shaped structures. Operation holes for easy installation and maintenance are provided on the box-shaped beams, and the operation holes are provided with sealing covers to prevent water from entering. A dirt intercepting structure is welded on the water-facing side between the two main beams of the main frame 1. Side beams are provided on both sides of the main frame 1. Two reverse support devices 2 are installed on the water-facing sides of the side beams on both sides of the main frame 1. As Figure 4 As shown, a water stop device 8 is installed on the water-back side of the main frame 1. As Figure 5 As shown, two main support devices 4 are correspondingly installed on the water-back sides of the side beams on both sides of the main frame 1. Drive structures are installed inside both main beams of the main frame 1. As Figure 6 As shown, a number of swing guide vanes 7 are commonly connected between the two drive structures.
[0033] The dirt intercepting structure includes a number of grid bars 3. Both ends of each grid bar 3 are respectively welded to the main beams at the top and bottom of the main frame 1, and the incoming dirt is intercepted through the grid bars 3. If the usage scenario is the water inlet of a water turbine unit, the spacing of the grid bars 3 is determined by the minimum spacing between the runner blades of the unit. If the usage scenario is the water intake of a drinking water project, the spacing of the grid bars 3 is determined by the incoming dirt situation upstream.
[0034] The main support device 4 adopts a rolling support type, the reverse support device 2 adopts a sliding support type, and arc-shaped stoppers 9 are installed on the water-back sides of both main beams of the main frame 1. The main frame 1 is a steel structure frame welded by steel plates. The side beams on both sides of the main frame 1 are both box-shaped structures. Lifting lugs are provided on the webs inside the side beams on both sides of the main frame 1, and are hoisted into the gate slot by a lifting device for installation and commissioning. Lifting lug holes are provided at the top and bottom of the side beams so that each gate can be connected to each other when stacked along the direction of the gate slot. Two strengthening steel pipes 10 are symmetrically installed on the water-back side of the main frame 1.
[0035] The drive structure includes a guide vane drive mechanism 6. The guide vane drive mechanism 6 is installed inside both main beams of the main frame 1. The guide vane drive mechanism 6 is of a gear-rack type. One end of the rack of the guide vane drive mechanism 6 is connected to an electric push rod 5. The electric push rod 5 is fixedly connected inside both main beams of the main frame 1. The electric push rod 5 has good waterproof performance and can operate underwater.
[0036] Both ends of each swing guide vane 7 extend into the top and bottom main girders inside the main frame 1 respectively. Gears are fixedly connected to both ends of the swing guide vane 7, and the racks of the two guide vane driving mechanisms 6 are respectively engaged with the gears at both ends of each swing guide vane 7. A sealing structure is installed at the connection between the swing guide vane 7 and the main girder of the main frame 1. The swing guide vane 7 is located between the grid bars 3 and the main frame 1, and the center line of the grid bars 3 coincides with the projection of the center line of the swing guide vane 7 in the water flow direction to reduce the occlusion of the flow-through section and affect the water flow velocity passing through.
[0037] The water stop device 8 can seal the gaps between the side girders on both sides of the main frame 1 and the gate slot, and the water stop device 8 can also seal the gaps between the two main girders of the main frame 1 and other single-section gates.
[0038] Each single-section gate is stacked vertically, and the opening and closing of the swing guide vanes of each section of the gate are respectively controlled to cut off or allow water to pass through, thereby realizing the function of stratified water intake.
[0039] The working principle of the stratified water intake gate with a trash rack function provided by the present utility model is as follows: Stack several sections of gates along the gate slot direction, as Figure 7-8 shown. By controlling the electric push rod to drive the rack in the guide vane driving mechanism to move in the direction perpendicular to the water flow, the gears installed at the top and bottom of the swing guide vane are driven, and then the opening and closing of the swing guide vane are controlled to cut off the water flow passing through this single-section gate.
[0040] By controlling the opening of the swing guide vanes of one or several sections of the gates and closing the swing guide vanes of the remaining gates for stratified water intake according to the above working principle. When the equipment composed of four-section gate devices is placed at the water inlet of the hydropower station turbine unit, the swing guide vane of the first section of the gate can be controlled to open and the swing guide vanes of the second, third, and fourth sections of the gate can be controlled to close according to the different upstream water levels. If the upstream water level drops, the second, third, and fourth sections of the gate can be successively opened to always take the warmer surface water; when the equipment composed of four-section gate devices is placed at the water intake of the diversion project, the swing guide vanes of the first, third, and fourth sections of the gate can be controlled to close and the swing guide vane of the second section of the gate can be controlled to open according to the upstream reservoir water level situation. According to the water quality monitoring conditions at different depths of the upstream reservoir, the equipment can be controlled to only open the swing guide vanes of one or several sections of the gate corresponding to the elevation with good water quality, and the swing guide vanes of the remaining gates remain closed to always take the middle or deep water with good water quality.
[0041] The installation position of the stratified water intake gate with a trash rack function provided by the present utility model can be the originally designed trash rack slot, replacing the original trash rack for trash rack work. During installation, the original designed gantry crane can be used to transfer the single-section gate above the slot and lock it through the grab beam. After connecting different single-section gates, the connected gates are lowered along the slot, and the topmost section of the gate is locked above the gate slot until all single-section gates are connected and then the connected gates are integrally placed on the bottom sill.
[0042] Example 1
[0043] The multi - layer water intake gate with a pollution - intercepting function proposed by the present utility model, as Figure 1-2 shown, includes a number of single - section gates;
[0044] As Figure 3 shown, each single - section gate includes a main frame 1. Main beams are provided at both the top and bottom of the main frame 1. Both main beams of the main frame 1 are of box - type structures. A pollution - intercepting structure is welded on the water - facing side between the two main beams of the main frame 1. Side beams are provided on both sides of the main frame 1. Two reverse support devices 2 are installed on the water - facing side of the side beams on both sides of the main frame 1. As Figure 5 shown, two main support devices 4 are correspondingly installed on the water - back side of the side beams on both sides of the main frame 1. Driving structures are installed inside both main beams of the main frame 1. As Figure 6 shown, a number of swing guide vanes 7 are jointly connected between the two driving structures. As Figure 4 shown, a water - stop device 8 is installed on the water - back side of the main frame 1.
[0045] Example 2
[0046] The multi - layer water intake gate with a pollution - intercepting function proposed by the present utility model, as Figure 1-2 shown, includes a number of single - section gates;
[0047] As Figure 3 shown, each single - section gate includes a main frame 1. Main beams are provided at both the top and bottom of the main frame 1. Both main beams of the main frame 1 are of box - type structures. A pollution - intercepting structure is welded on the water - facing side between the two main beams of the main frame 1. Side beams are provided on both sides of the main frame 1. Two reverse support devices 2 are installed on the water - facing side of the side beams on both sides of the main frame 1. As Figure 5 shown, two main support devices 4 are correspondingly installed on the water - back side of the side beams on both sides of the main frame 1. Driving structures are installed inside both main beams of the main frame 1. As Figure 6 shown, a number of swing guide vanes 7 are jointly connected between the two driving structures. As Figure 4 shown, a water - stop device 8 is installed on the water - back side of the main frame 1.
[0048] The pollution - intercepting structure includes a number of grating bars 3. Both ends of each grating bar 3 are respectively welded to the main beams at the top and bottom of the main frame 1. The main support device 4 adopts a rolling support type, and the reverse support device 2 adopts a sliding support type. Arc - shaped blocks 9 are installed on the water - back side of both main beams of the main frame 1.
[0049] Both side beams of the main frame 1 are of box - type structures. Lifting lugs are provided on the webs inside both side beams of the main frame 1. Two reinforcing steel pipes 10 are symmetrically installed on the water - back side of the main frame 1.
[0050] The driving structure includes a guide vane driving mechanism 6, which is installed inside the two main beams of the main frame 1. The guide vane driving mechanism 6 is of the rack and pinion type. One end of the rack of the guide vane driving mechanism 6 is connected to an electric push rod 5, and the electric push rod 5 is fixedly connected inside the two main beams of the main frame 1.
[0051] Embodiment 3
[0052] The layered water intake gate with a trash rack function proposed by the present utility model, as Figure 1-2 shown, includes a number of single-section gates;
[0053] As Figure 3 shown, each single-section gate includes a main frame 1. Main beams are provided at both the top and bottom of the main frame 1. The two main beams of the main frame 1 are both box-shaped structures. A trash rack structure is welded on the water-facing side between the two main beams of the main frame 1. Side beams are provided on both sides of the main frame 1. Two reverse support devices 2 are installed on the water-facing side of the side beams on both sides of the main frame 1. As Figure 5 shown, two main support devices 4 are correspondingly installed on the water-back side of the side beams on both sides of the main frame 1. A driving structure is installed inside each of the two main beams of the main frame 1. As Figure 6 shown, a number of swing guide vanes 7 are commonly connected between the two driving structures. As Figure 4 shown, a water stop device 8 is installed on the water-back side of the main frame 1.
[0054] The trash rack structure includes a number of grid bars 3. Both ends of each grid bar 3 are respectively welded to the main beams at the top and bottom of the main frame 1. The main support device 4 adopts a rolling support type, and the reverse support device 2 adopts a sliding support type. Arc-shaped stoppers 9 are installed on the water-back side of the two main beams of the main frame 1.
[0055] Both side beams of the main frame 1 are box-shaped structures. Lifting lugs are provided on the webs inside the side beams on both sides of the main frame 1. Two reinforcing steel pipes 10 are symmetrically installed on the water-back side of the main frame 1.
[0056] The driving structure includes a guide vane driving mechanism 6, which is installed inside the two main beams of the main frame 1. The guide vane driving mechanism 6 is of the rack and pinion type. One end of the rack of the guide vane driving mechanism 6 is connected to an electric push rod 5, and the electric push rod 5 is fixedly connected inside the two main beams of the main frame 1.
[0057] Both ends of each swing guide vane 7 respectively extend into the main beams at the top and bottom of the main frame 1. Gears are fixedly connected to both ends of the swing guide vane 7. The racks of the two guide vane driving mechanisms 6 are respectively meshed with the gears at both ends of each swing guide vane 7. A sealing structure is installed at the connection between the swing guide vane 7 and the main beam of the main frame 1. The swing guide vane 7 is located between the grid bar 3 and the main frame 1. The center line of the grid bar 3 coincides with the projection of the center line of the swing guide vane 7 in the water flow direction.
[0058] Each single-section gate is stacked vertically.
[0059] The water stop device 8 can seal the gaps between the side beams on both sides of the main frame 1 and the gate slot, and the water stop device 8 can also seal the gaps between the two main beams of the main frame 1 and other single-section gates.
Claims
1. A layered water intake gate with a trash interception function, characterized in that, It includes several single-section gates; Each of the single-section gates includes a main frame (1). Main beams are provided at both the top and bottom of the main frame (1). Both main beams of the main frame (1) are of box-type structures. A trash rack structure is welded on the water-facing side between the two main beams of the main frame (1). Side beams are provided on both sides of the main frame (1). Two reverse support devices (2) are installed on the water-facing sides of the side beams on both sides of the main frame (1). Two main support devices (4) are correspondingly installed on the water-back sides of the side beams on both sides of the main frame (1). Drive structures are installed inside the two main beams of the main frame (1). A number of swing guide vanes (7) are commonly connected between the two drive structures. A water stop device (8) is installed on the water-back side of the main frame (1).
2. The layered water intake gate with a trash interception function according to claim 1, wherein, The trash rack structure includes several grid bars (3). Both ends of each grid bar (3) are respectively welded to the main beams at the top and bottom of the main frame (1).
3. The layered water intake gate with a trash intercepting function according to claim 1, characterized in that, The main support device (4) adopts a rolling support type, the reverse support device (2) adopts a sliding support type, and arc-shaped stoppers (9) are installed on the water-back sides of the two main beams of the main frame (1).
4. The layered water intake gate with a trash interception function according to claim 1, characterized in that, The side beams on both sides of the main frame (1) are of box-type structures. Lifting lugs are provided on the webs inside the side beams on both sides of the main frame (1). Two strengthening steel pipes (10) are symmetrically installed on the water-back side of the main frame (1).
5. The layered water intake gate with a trash interception function according to claim 2, characterized in that, The drive structure includes a guide vane drive mechanism (6). The guide vane drive mechanism (6) is installed inside the two main beams of the main frame (1). The guide vane drive mechanism (6) is of a gear-rack type. One end of the rack of the guide vane drive mechanism (6) is connected to an electric push rod (5), and the electric push rod (5) is fixedly connected inside the two main beams of the main frame (1).
6. The layered water intake gate with a trash intercepting function according to claim 5, characterized in that, Both ends of each swing guide vane (7) respectively extend into the main beams at the top and bottom of the main frame (1). Gears are fixedly connected to both ends of the swing guide vane (7). The racks of the two guide vane drive mechanisms (6) are respectively meshed with the gears at both ends of each swing guide vane (7).
7. The layered water intake gate with a trash interception function according to claim 6, characterized in that, [[ID= siete]]A sealing structure is installed at the connection between the swing guide vane (7) and the main beam of the main frame (1).
8. The layered water intake gate with a trash intercepting function according to claim 6, characterized in that, The swing guide vane (7) is located between the grid bar (3) and the main frame (1). The center line of the grid bar (3) coincides with the projection of the center line of the swing guide vane (7) in the water flow direction.
9. The layered water intake gate with a trash interception function according to claim 1, wherein Each of the single-section gates is stacked vertically.
10. The layered water intake gate with a trash intercepting function according to claim 1, characterized in that, The water stop device (8) can seal the gaps between the side beams on both sides of the main frame (1) and the gate slot, and the water stop device (8) can also seal the gaps between the two main beams of the main frame (1) and other single-section gates.