Self-floating stepless displacement water intake device and its usage method

Abstract

This invention provides a self-floating, steplessly shifting water intake device and its usage method. The device includes an intake tower and, sequentially arranged from upstream to downstream, a floating gate slot, a stacked beam slot, an emergency maintenance gate slot, and an arc-shaped working gate slot within the intake tower. The floating gate slot contains a floating gate that can slide up and down along the slot with the water level. The stacked beam slot contains stacked beams. The floating gate forms a U-shaped flow surface, through which surface water flows into the downstream channel. An overhang is located at the bottom of the downstream surface of the floating gate, and the end of the overhang has a water-stopping device that contacts the stacked beams in the downstream stacked beam slot. The stacked beams consist of multiple sections; some stacked beams are placed in the stacked beam slot to block water, while others are stored in a stacked beam gate reservoir. The bridge crane is used to adjust the number of stacked beam sections in the stacked beam slot according to changes in the reservoir water level. This invention enables the intake of surface water with stepless floating gate displacement and adapts to large fluctuations in water level.

Description

Technical Field

[0001] This invention relates to the field of water conservancy and hydropower engineering, specifically a self-floating stepless displacement water intake device and its usage method, which is particularly suitable for stratified water intake in water transmission lines of water conservancy and hydropower engineering. Background Technology

[0002] To mitigate the impact of water temperature released from hydropower projects on the ecological environment, water intakes typically employ stratified water intake to extract surface water. The main types of stratified water intakes include multi-layered, stacked beam gate, flap gate, inclined, and sleeve-type intakes. Among these, the multi-layered, stacked beam gate, flap gate, and inclined intake schemes share the characteristic of adjustable depth; that is, the water intake depth changes in increments of a single gate section, resulting in abrupt changes in depth and preventing stepless stratified water intake.

[0003] With the increasing emphasis placed on ecological environment by the country, sleeve gates have emerged. Their pipe body is composed of cylinders of different diameters connected together, with the upper sleeve sleeved over the lower sleeve. Early sleeve gates for stratified water intake used mechanical control, which employed mechanical equipment to suspend the top cylinder and controlled the cylinder's extension and retraction by raising or lowering the slings to achieve the purpose of taking surface water. This was an improved gear adjustment that reduced the jumps in water intake depth. Based on this, a self-floating sleeve water intake was developed, in which the float moves up and down with the water level, achieving stepless displacement water intake.

[0004] The self-floating sleeve gate mainly consists of two parts: an upper pontoon and a sleeve. The buoyancy of the upper pontoon pulls up the lower sleeve sections. The pontoon has a certain draft, and surface water flows into the sleeve through the gap between the top sleeve section and the pontoon, then supplies water downstream through the intake tower channel. In practical engineering applications, the self-floating sleeve gate has the following main drawbacks: 1) It is difficult to extract surface water; 2) It has limited adaptability to water level fluctuations. When the water level at the intake fluctuates significantly, it requires multiple sleeve sections, which are prone to jamming and damage. Summary of the Invention

[0005] The purpose of this invention is to provide a self-floating stepless displacement water intake device and its usage method, which can extract surface water and adapt to large fluctuations in water level.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A self-floating, continuously variable water intake device includes an intake tower and, sequentially from upstream to downstream, a floating gate slot, a stacked beam gate slot, an emergency maintenance gate slot, and an arc-shaped working gate slot. The floating gate slot contains a floating gate that slides up and down with the water level. The stacked beam gate slot contains a stacked beam. The emergency maintenance gate slot contains an emergency maintenance gate. The arc-shaped working gate slot contains an arc-shaped working gate. A bridge crane is installed at the top of the intake tower, a stacked beam gate housing is installed behind the breast wall, and a hydraulic hoist is positioned above the arc-shaped working gate. The floating gate forms a U-shaped flow surface, allowing surface water to pass through. The body flows into the downstream channel from the U-shaped flow surface. The bottom of the downstream side of the floating gate is provided with an eave. The end of the eave is provided with a water-stopping device that contacts the stacked beams in the downstream stacked beam gate slot. The water above the eave and the water-stopping device are in a flat pressure state with the water below. The stacked beam is composed of multiple sections. Some of the stacked beams are stacked in the stacked beam gate slot to block water, and the other part of the stacked beams are stored in the stacked beam gate storage. The bridge crane is used to adjust the number of stacked beam sections in the stacked beam gate slot according to the changes in the reservoir water level, and to lift the stacked beams in the stacked beam gate slot to the stacked beam gate storage or to lift the stacked beams in the stacked beam gate storage into the stacked beam gate slot.

[0008] Furthermore, a debris barrier is provided on the upper part of the U-shaped flow surface of the floating gate.

[0009] Furthermore, a trash rack trough is provided upstream of the floating gate trough, and a trash rack is installed in the trash rack trough.

[0010] Furthermore, the floating gate includes an upper side column pontoon box and a lower pontoon box. The upper side column pontoon box and the lower pontoon box respectively set on the upper two sides form the U-shaped flow surface. The buoyancy of the floating gate is provided by the two upper side column pontoon boxes and the lower pontoon box.

[0011] Furthermore, the stacked beams within the stacked beam door slot are hoisted into the stacked beam door storage area. The specific process is as follows:

[0012] The water-stopping device on the eaves of the floating gate contacts the first section of the stacked beam in the gate slot. When the water level changes, the floating gate slides up and down along the stacked beam. When the water level drops, the floating gate drops and the water-stopping device of the floating gate moves downward. When the difference between the bottom elevation of the U-shaped flow surface of the floating gate and the top elevation of the first section of the stacked beam is less than h1, the water-stopping device contacts the second section of the stacked beam. In order not to affect the flow of the U-shaped flow surface, the first section of the stacked beam is hoisted out to the stacked beam gate.

[0013] The stacked beams inside the stacked beam gatehouse are hoisted into the stacked beam gate slot. The specific process is as follows:

[0014] The water-stopping device on the eaves of the floating gate contacts the top section of the stacked beam. When the water level changes, the floating gate slides up and down along the stacked beam. When the water level rises, the floating gate floats up. When the difference between the bottom elevation of the floating gate and the top elevation of the first section of the stacked beam is equal to h2, it is hoisted into the stacked beam.

[0015] Furthermore, the critical state for lifting out the first section of the stacked beam is: the difference between the bottom elevation of the U-shaped flow surface and the top elevation of the first section of the stacked beam is h1, and the difference between the bottom elevation of the floating gate and the top elevation of the second section of the stacked beam is h2. H = h + h1 + h2, where H is the height of the floating gate below the U-shaped flow surface and h is the height of a single section of the stacked beam.

[0016] Furthermore, h1 is determined based on the flow velocity and water intake flow rate, and is set to 200mm~400mm; h2 is determined based on the size of the water-stopping device, and is set to 500mm~700mm.

[0017] A method of using the self-floating stepless displacement water intake device as described above includes:

[0018] During normal water intake, the floating gate is installed in the floating gate slot, and the stacked beam is installed in the stacked beam slot. The floating gate is suspended in the floating gate slot under the action of the reservoir water. The surface water flows out to the downstream channel through the U-shaped flow surface. The water-stopping device at the end of the eaves contacts the stacked beam panel.

[0019] The floating gate moves freely and steplessly as the water level in the reservoir rises or falls. The downstream stacked beams are adjusted according to the water level changes by using a bridge crane on the top of the tower to adjust the number of stacked beam sections in the stacked beam gate slot, and to lift the stacked beams in the stacked beam gate slot out to the stacked beam gate storage or to lift the stacked beams in the stacked beam gate storage into the stacked beam gate slot.

[0020] Furthermore, hoisting the stacked beams from the stacked beam door slot into the stacked beam door storage area, or hoisting the stacked beams from the stacked beam door storage area into the stacked beam door slot, specifically includes:

[0021] When the water level drops, the floating gate descends, and the water-stopping device of the floating gate moves downward. When the difference between the bottom elevation of the U-shaped flow surface of the floating gate and the top elevation of the first section of the stacked beam is less than h1, the water-stopping device contacts the second section of the stacked beam. In order not to affect the flow of the U-shaped flow surface, the first section of the stacked beam is lifted out to the stacked beam gate. h1 is the difference between the bottom elevation of the U-shaped flow surface and the top elevation of the first section of the stacked beam.

[0022] When the water level rises, the floating gate rises. When the difference between the bottom elevation of the floating gate and the top elevation of the first section of the stacked beam is less than h2, the stacked beam is hoisted in.

[0023] h1 is determined based on the flow velocity and water intake flow rate, and is set to 200mm~400mm; h2 is determined based on the size of the water-stopping device, and is set to 500mm~700mm.

[0024] Compared with traditional self-floating sleeve gate devices, the structure of the present invention has the following advantages:

[0025] (1) By forming a U-shaped flow surface in the floating gate, the surface water flows into the downstream channel from the U-shaped flow surface, the surface water can be taken, the flow is stable, and the water intake area is large, ensuring the water intake flow rate;

[0026] (2) The height of the floating gate itself is not affected by the water level fluctuation. That is, the floating gate of the same height can be used for water level changes of up to tens of meters. At the same time, the number of stacked beam sections in the stacked beam gate slot can be adjusted according to the water level change of the reservoir. The stacked beams in the stacked beam gate slot can be lifted out to the stacked beam gate reservoir or the stacked beams in the stacked beam gate reservoir can be lifted into the stacked beam gate slot. Therefore, the present invention can adapt to large fluctuations in water level.

[0027] (3) The floating gate has a simple structure and is equipped with reverse support, forward support and lateral support, which makes the floating gate run smoothly. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a self-floating stepless displacement water intake device according to an embodiment of the present invention;

[0029] Figure 2 This is a three-dimensional structural diagram of the floating door in an embodiment of the present invention;

[0030] Figure 3 This is an upstream view of the floating gate according to an embodiment of the present invention;

[0031] Figure 4 This is a downstream view of the floating gate according to an embodiment of the present invention;

[0032] Figure 5 This is a diagram showing the relationship between the upper part of the floating gate and the stacked beam in the direction of water flow according to an embodiment of the present invention;

[0033] Figure 6 This is a diagram showing the relationship between the lower part of the floating gate and the stacked beam in the direction of water flow according to an embodiment of the present invention;

[0034] Figure 7 This is a diagram illustrating the sliding motion of the floating gate with the water flow according to an embodiment of the present invention.

[0035] Figure 8 for Figure 7 Enlarged view of section A;

[0036] Figure 9 This is a diagram showing the positional relationship between the floating gate and the stacked beams during the hoisting of the stacked beams according to an embodiment of the present invention;

[0037] Figure 10 This diagram illustrates the positional relationship between the floating gate and the stacked beams during the hoisting of the stacked beams in an embodiment of the present invention.

[0038] In the diagram: 1.1—Trash rack channel, 1.2—Trash rack, 2.1—Floating gate channel, 2.2—Floating gate, 3.1—Stacked beam channel, 3.2—Stacked beam, 3.3—Stacked beam gate, 3.21—First stacked beam, 3.22—Second stacked beam, 4.1—Emergency maintenance door channel, 4.2—Emergency maintenance door, 5.1—Arc-shaped working door channel, 5.2—Arc-shaped working door, 6—Downstream flow channel, 7—Upper side column float box, 8—Lower float box, 9—U-shaped flow surface, 10—Forward support, 11—Reverse support, 12—Lateral support, 13—Eaves, 14—Waterstop device. Detailed Implementation

[0039] The technical solutions of the present invention will now be clearly and completely described with reference to the accompanying drawings.

[0040] Please see Figure 1-10 This invention provides a self-floating stepless displacement water intake device, including an intake tower and, sequentially arranged from upstream to downstream within the intake tower, a trash rack trough 1.1, a floating door trough 2.1, a stacked beam trough 3.1, an emergency maintenance door trough 4.1, and an arc-shaped working door trough 5.1. The trash rack trough 1.1 contains a trash rack 1.2, the floating door trough 2.1 contains a floating door 2.2, the stacked beam trough 3.1 contains a stacked beam 3.2, the emergency maintenance door trough 4.1 contains an emergency maintenance door 4.2, and the arc-shaped working door trough 5.1 contains an arc-shaped working door 5.2. A bridge crane is installed at the top of the intake tower, a stacked beam door trough 3.3 is installed behind the breast wall, and a hydraulic hoist is installed above the arc-shaped working door 5.2.

[0041] See Figure 2 , Figure 3 and Figure 4The floating gate 2.2 includes an upper side column pontoon 7, a lower pontoon 8, a U-shaped flow surface 9, a forward support 10, a reverse support 11, a lateral support 12, an eaves 13, and a water-stopping device 14. The side column pontoons 7 and the lower pontoon 8, respectively, are arranged on the upper two sides of the floating gate 2.2 to form a U-shaped flow surface 9. The eaves 13 are welded to the bottom of the downstream side of the floating gate 2.2. The water-stopping device 14 of the floating gate 2.2 is installed at the end of the eaves 13 and contacts the downstream stacked beam 3.2. The stacked beam 3.2 consists of multiple sections. Some sections are stacked one by one in the stacked beam gate slot 3.1 to block water, while others are stored in the stacked beam gate reservoir 3.3. According to changes in the reservoir water level, the number of stacked beam sections in the stacked beam gate slot 3.1 is adjusted using the bridge crane at the top of the intake tower. The stacked beams 3.2 in the stacked beam gate slot 3.1 are then hoisted out or into the stacked beam gate reservoir 3.3. The stacked beams 3.2 in the stacked beam gate slot 3.1 are sequentially named from top to bottom as the first stacked beam 3.21, the second stacked beam 3.22, etc., and the names of the stacked beams are defined accordingly. The eaves 13 and the water-stopping device 14 are used to prevent reservoir water from entering the flow channel through the gap between the floating gate 2.2 and the downstream stacked beams. The reverse support 11, the forward support 10, and the lateral support 12 are used to ensure that the floating gate 2.2 slides up and down within the floating gate gate slot 2.1, maintaining the smooth operation of the floating gate 2.2.

[0042] See Figure 7 and Figure 8 The buoyancy of the floating gate 2.2 is provided by two upper side column pontoons 7 and a lower pontoon 8. Surface water flows into the downstream channel 6 from the U-shaped flow surface 9, forming a stable weir flow. The height of the floating gate structure below the U-shaped flow surface 9 is H, and the height of a single section of the stacked beam 3.2 is h (e.g., Figure 9 (As shown).

[0043] During normal water intake, a trash rack 1.2 is placed inside the trash rack channel 1.1 to intercept debris at the inlet. A floating gate 2.2 is installed in the floating gate slot 2.1, and a stacked beam 3.2 is installed in the stacked beam slot 3.1. The floating gate 2.2 is suspended in the floating gate slot 2.1 under the influence of the reservoir water. Surface water flows out to the downstream channel through the U-shaped flow surface 9. The water-stopping device 14 at the end of the eaves 13 contacts the panel of the stacked beam 3.2, and the water above and below the eaves 13 and the water-stopping device 14 is under equal pressure. Reservoir water can only enter the downstream channel 6 through the U-shaped flow surface 9, thus enabling the intake of surface reservoir water. The floating gate 2.2 rises or falls with changes in reservoir water level, adapting to water level changes of up to tens of meters, achieving stepless stratified water intake without the need for mechanical equipment to provide mechanical force for raising or lowering.

[0044] After a period of operation, the floating gate 2.2 and the stacked beam 3.2 require maintenance. The main maintenance tasks include replacing the water-stopping device 14 and applying anti-corrosion coating to rusted areas. The floating gate 2.2 and the stacked beam 3.2 are lifted to the top of the intake tower using a tower crane for maintenance. No special maintenance gate is needed upstream of the floating gate 2.2 and the stacked beam 3.2. When there is less debris in the reservoir, a trash rack can be installed on the U-shaped flow surface 9, thus eliminating the need for the trash rack 1.2 upstream of the floating gate and saving space. The emergency maintenance gate 4.2 is locked above the orifice by a boom, and the arc-shaped working gate 5.2 controls the flow of water in the channel by adjusting its opening degree. When the arc-shaped working gate 5.2 needs maintenance, the emergency maintenance gate 4.2 is closed by moving water. After maintenance is completed, the arc-shaped working gate 5.2 is closed. The emergency maintenance gate 4.2 is pressurized by a pressure equalization valve. After pressure equalization, the emergency maintenance gate 4.2 is locked above the opening of the emergency maintenance gate slot 4.1 by the top bridge machine of the water inlet tower. Then the arc-shaped working gate 5.2 is opened for normal water intake.

[0045] The floating gate 2.2 floats freely and steplessly with the rise and fall of the reservoir water level. Downstream, the stacked beam 3.2 needs to be adjusted according to the reservoir water level using a tower crane to change the number of stacked beam sections within the gate slot 3.1, and to hoist the stacked beam 3.2 from the gate slot 3.1 into the gate housing 3.3.

[0046] (1) Lift out the stacked beams

[0047] See Figure 9 The water-stopping device 14 on the eaves 13 of the floating gate 2.2 contacts the first section of the stacked beam 3.21. When the water level changes, the floating gate 2.2 slides up and down along the stacked beam 3.2. When the water level drops, the floating gate 2.2 descends, and the water-stopping device 14 of the floating gate 2.2 moves downward. When the difference between the bottom elevation of the U-shaped flow surface 9 of the floating gate 2.2 and the elevation of the first section of the stacked beam 3.21 is equal to h1, the water-stopping device 14 contacts the second section of the stacked beam 3.22. In order not to affect the flow of the U-shaped flow surface 9, the first section of the stacked beam 3.21 needs to be hoisted out to the stacked beam gate 3.3. At this time, the second section of the stacked beam 3.22 is called the first section of the stacked beam 3.21. The critical state for lifting out the first section of the stacked beam 3.21: The difference between the bottom elevation of the U-shaped flow surface 9 and the top elevation of the first section of the stacked beam 3.21 is h1. At this time, the difference between the bottom elevation of the floating gate 2.2 and the top elevation of the second section of the stacked beam 3.22 is h2, where H = h + h1 + h2. h1 is determined based on the flow velocity and water intake flow rate, generally 200mm~400mm; h2 is determined based on the size of the water-stopping device, generally 500mm~700mm; h is the height of a single section of the stacked beam.

[0048] (2) Hoisting in the stacked beams

[0049] See Figure 10The water-stopping device 14 on the eaves 13 of the floating gate 2.2 contacts the top section of the stacked beam. When the water level changes, the floating gate 2.2 slides up and down along the stacked beam 3.2. When the water level rises, the floating gate 2.2 floats up. When the difference between the bottom elevation of the floating gate 2.2 and the top elevation of the first section of the stacked beam 3.21 is equal to h2, the stacked beam 3.2 needs to be hoisted in. Otherwise, as the water level rises, the water-stopping device 14 will detach from the stacked beam 3.2, and the U-shaped flow surface 9 will flow through the bottom of the floating gate 2.2 simultaneously, affecting the water temperature at the intake. After the stacked beam 3.2 is hoisted in, the first section of the stacked beam 3.21 is called the second section of the stacked beam 3.22, and the stacked beam hoisted in from the stacked beam gate 3.3 is now called the first section of the stacked beam 3.21.

[0050] Compared with traditional self-floating sleeve gate devices, the structure of the present invention has the following advantages:

[0051] (1) The surface water flows into the downstream channel from the U-shaped flow surface 9, which is equivalent to a weir flow. It takes surface water and the flow is stable. In addition, the inlet area is large and the flow rate is large, which ensures the water intake flow rate.

[0052] (2) The height of the floating gate 2.2 itself is not affected by the water level fluctuation, that is, the floating gate 2.2 of the same height can be used for projects with water level changes of up to tens of meters.

[0053] (3) The floating door 2.2 is a flat door structure with reverse support 11, forward support 10 and lateral support 12 installed, which makes the floating door 2.2 run smoothly.

[0054] (4) When the floating gate 2.2 and the stacked beam 3.2 need maintenance, they can be directly lifted to the top of the water intake tower without the need to install a maintenance gate upstream of them; in addition, a trash rack can be installed on the U-shaped flow surface 9, thereby eliminating the need for the trash rack 1.2 upstream of the floating gate 2.2. Therefore, the present invention has a compact layout and saves investment.

[0055] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A self-floating stepless displacement water intake device, characterized by: The system includes an intake tower and, sequentially from upstream to downstream, floating gate slots, stacked beam gate slots, emergency maintenance gate slots, and arc-shaped working gate slots. The floating gate slots contain floating gates that slide up and down with the water level. The stacked beam gate slots contain stacked beams. The emergency maintenance gate slots contain emergency maintenance gates. The arc-shaped working gate slots contain arc-shaped working gates. A bridge crane is installed at the top of the intake tower, and a stacked beam gate housing is located behind the breast wall. A hydraulic hoist is positioned above the arc-shaped working gate. The floating gates form a U-shaped flow surface, through which surface water flows. The water flows into the downstream channel. The bottom of the downstream side of the floating gate is provided with an eave. The end of the eave is provided with a water-stopping device that contacts the stacked beams in the downstream stacked beam gate slot. The water above the eave and the water-stopping device are in a flat pressure state with the water below. The stacked beam is composed of multiple sections. Some of the stacked beams are stacked in the stacked beam gate slot to block water, and the other part of the stacked beams are stored in the stacked beam gate storage. The bridge crane is used to adjust the number of stacked beam sections in the stacked beam gate slot according to the changes in the reservoir water level, and to lift the stacked beams in the stacked beam gate slot out to the stacked beam gate storage or to lift the stacked beams in the stacked beam gate storage into the stacked beam gate slot. The stacked beams in the stacked beam gate slot are hoisted out to the stacked beam gate storage. The specific process is as follows: The water-stopping device on the eaves of the floating gate contacts the first section of the stacked beam in the stacked beam gate slot. When the water level changes, the floating gate slides up and down along the stacked beam. When the water level drops, the floating gate drops, and the water-stopping device of the floating gate moves downward. When the difference between the bottom elevation of the U-shaped flow surface of the floating gate and the top elevation of the first section of the stacked beam is equal to h1, the water-stopping device contacts the second section of the stacked beam. In order not to affect the flow of the U-shaped flow surface, the first section of the stacked beam is hoisted out to the stacked beam gate storage. The stacked beams inside the stacked beam gate are hoisted into the stacked beam gate slot. The specific process is as follows: The water-stopping device on the eaves of the floating gate contacts the top stacked beam. When the water level changes, the floating gate slides up and down along the stacked beam. When the water level rises, the floating gate floats up. When the difference between the bottom elevation of the floating gate and the top elevation of the first stacked beam is equal to h2, the stacked beam is hoisted in. The critical state for hoisting out the first stacked beam is: the difference between the bottom elevation of the U-shaped flow surface and the top elevation of the first stacked beam is h1. At this time, the difference between the bottom elevation of the floating gate and the top elevation of the second stacked beam is h2. H = h + h1 + h2, where H is the height of the floating gate below the U-shaped flow surface and h is the height of a single stacked beam.

2. The self-floating stepless displacement water intake device according to claim 1, characterized in that: A debris barrier is installed on the upper part of the U-shaped flow surface of the floating gate.

3. The self-floating stepless displacement water intake device of claim 1, wherein: A trash rack channel is installed upstream of the floating gate channel, and a trash rack is installed in the trash rack channel.

4. The self-floating stepless displacement water intake device of claim 1, wherein: The floating gate includes an upper side column pontoon box and a lower pontoon box. The upper side column pontoon box and the lower pontoon box are respectively arranged on the upper two sides to form the U-shaped flow surface. The buoyancy of the floating gate is provided by the two upper side column pontoon boxes and the lower pontoon box.

5. The self-floating stepless displacement water intake device as described in claim 1, characterized in that: h1 is determined based on the flow velocity and water intake flow rate, and is set to 200mm~400mm; h2 is determined based on the size of the water-stopping device, and is set to 500mm~700mm.

6. A method of using a self-floating stepless displacement water intake device as described in any one of claims 1-5, characterized in that, include: During normal water intake, the floating gate is installed in the floating gate slot, and the stacked beam is installed in the stacked beam slot. The floating gate is suspended in the floating gate slot under the action of the reservoir water. The surface water flows out to the downstream channel through the U-shaped flow surface. The water-stopping device at the end of the eaves contacts the stacked beam panel. The floating gate moves freely and steplessly as the water level in the reservoir rises or falls. The downstream stacked beams are adjusted according to the water level changes by using a bridge crane on the top of the tower to adjust the number of stacked beam sections in the stacked beam gate slot, and to lift the stacked beams in the stacked beam gate slot out to the stacked beam gate storage or to lift the stacked beams in the stacked beam gate storage into the stacked beam gate slot.

7. The self-floating stepless displacement water intake device as described in claim 6, characterized in that: The process of hoisting the stacked beams from the stacked beam gate slot into the stacked beam gate housing, or hoisting the stacked beams from the stacked beam gate housing into the stacked beam gate slot, specifically includes: When the water level drops, the floating gate descends, and the water-stopping device of the floating gate moves downward. When the difference between the bottom elevation of the U-shaped flow surface of the floating gate and the top elevation of the first section of the stacked beam is equal to h1, the water-stopping device contacts the second section of the stacked beam. In order not to affect the flow of the U-shaped flow surface, the first section of the stacked beam is lifted out to the stacked beam gate. When the water level rises, the floating gate rises. When the difference between the bottom elevation of the floating gate and the top elevation of the first section of the stacked beam is equal to h2, the stacked beam is hoisted in. h1 is determined according to the flow velocity and water intake flow rate, and is set to 200mm~400mm. h2 is determined according to the size of the water-stopping device, and is set to 500mm~700mm.

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