Floating type pre-precipitation water taking head for shallow water

Abstract

The utility model relates to a floating type pre-precipitation water taking head for shallow water. The floating type pre-precipitation water taking head comprises a water inlet guide grid group, a labyrinth inclined plate separation chamber, a buoyancy upper shell and a clear water separation chamber, the water inlet guide grid group consists of a rhombic baffle and a plurality of water inlet guide grids; the labyrinth inclined plate separation chamber is composed of a flow blocking hopper unit, a labyrinth inclined plate separation chamber shell and an inclined plate array. A plurality of short flow blocking partition plates are embedded in the first-stage flow blocking hopper; a plurality of upward flow inclined plates are embedded in the second-stage flow blocking hopper; according to the water taking head, floating objects with large and small sizes can be prevented from entering the water taking head, the silt content is reduced, and meanwhile the water taking head has high anti-blocking capacity; the device can fully adapt to the application environment with shallow water flow; and when the water flow depth and the sand content are changed in a rainfall flood season, automatic adjustment can be performed to adapt to the change.

Description

Technical Field

[0001] This utility model relates to the field of water intake head technology, specifically a floating pre-sedimentation water intake head for shallow water. Background Technology

[0002] Mountainous villages and towns have complex terrain and variable climates, resulting in scarce groundwater resources. Shallow rivers such as streams are the main water source for these villages and towns. The steep slopes of the mountains in these areas lead to rapid water flow and shallow water depth. During the dry season, the flow rate is low, further reducing the water depth. However, at this time, the water has low turbidity, low microbial content, and relatively good water quality. During the rainy season, the sediment content in the water rises sharply, leading to high turbidity pollution. This uneven distribution of water quality over time causes great inconvenience to water plant supply. Water plant structures built to rainy season water quality standards have high investment costs, while these structures suffer from low utilization rates during the dry season when the water quality is better.

[0003] The intake head is a crucial part of the water supply system, representing the first step in obtaining water from nature. Existing intake heads, such as trumpet-shaped, mushroom-shaped, fish-shaped, box-type, and pier-type heads, only have the function of intercepting large floating objects. While inclined plate intake heads, which have a certain capacity for sediment handling, have very high water depth requirements (as stated in *Water Supply Engineering*: to avoid pushing away sediment, the lower edge of the side intake should be above the riverbed, generally not less than 0.5m, and the top intake should be 1.0-1.5m above the riverbed), making them unsuitable for use in shallow mountain surface water during the dry season. To ensure stable water intake in mountain surface water during this time, weirs or troughs are generally constructed to increase the water depth, adapting to the depth requirements of conventional intake heads. This undoubtedly... This increases water intake costs and workload. During the rainy season, the water volume increases, and although the surface water depth meets the requirements of conventional water intake heads, the floodwaters carry a large amount of silt and floating debris, causing blockages and siltation in the weirs and troughs. The silt in the water enters the water pump through the water intake head, causing wear on the pump's water passage parts and significantly reducing the pump's service life. Even in gravity-driven water plants, silt deposition in structures and equipment can affect equipment operation and water quality, and even cause blockages. Some rivers and surface waters also contain small floating objects that cannot be removed by conventional water intake heads. Excessive floating objects in the water can block the water intake head's inlet holes. When floating objects enter the water pump with the water flow, they can also entangle the impeller, and in severe cases, directly cause the water plant to shut down.

[0004] Therefore, there is an urgent need for a water intake head with dynamic adjustment and treatment capabilities. This head should be able to stably extract water during the dry season in mountainous areas when surface water flow is low and water depth is shallow, and should have very low or no sediment treatment capabilities. Conversely, during the rainy season when surface water depth meets the requirements of conventional water intake heads, it should possess highly efficient sediment treatment capabilities. This is to solve the problems of water access difficulties for rural residents and excessive turbidity in drinking water, ensuring drinking water safety. Furthermore, this water intake head should have anti-clogging capabilities to ensure long-term stable operation. Utility Model Content

[0005] The purpose of this invention is to provide a floating pre-sedimentation water intake head for shallow water to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model is a floating pre-sedimentation water intake head for shallow water, including an inlet guide grid assembly, a labyrinth inclined plate separation chamber, a buoyancy upper shell, and a clear water compartment.

[0007] The inlet guide grid assembly is connected to the labyrinth inclined plate separation chamber. The upper shell of the labyrinth inclined plate separation chamber covers the buoyancy upper shell. The labyrinth inclined plate separation chamber has the inlet guide grid assembly as its front end and the rear end connected to the clear water compartment.

[0008] The water inlet guide grid assembly, the labyrinth inclined plate separation chamber, and the clear water compartment are connected to form an internal channel through which water flows sequentially through the water inlet guide grid assembly, the labyrinth inclined plate separation chamber, and the clear water compartment;

[0009] The inlet guide grid assembly consists of a diamond-shaped baffle and multiple inlet guide grids; the labyrinth inclined plate separation chamber consists of a flow-blocking bucket unit, a labyrinth inclined plate separation chamber shell, and an inclined plate array.

[0010] The flow-blocking bucket unit consists of several primary flow-blocking buckets, secondary flow-blocking buckets, and tertiary flow-blocking buckets; several flow-shortening baffles are embedded in the primary flow-blocking buckets; several upward-flowing inclined plates are embedded in the secondary flow-blocking buckets; and several toothed reverse-flowing inclined plates are embedded in the tertiary flow-blocking buckets.

[0011] The system consists of an inlet guide grid assembly, a labyrinth inclined plate separation chamber, a buoyancy upper shell, and a clear water compartment. Positioned in the water flow with the inlet guide grid assembly at the front and the clear water compartment at the rear, the front faces the water and the rear faces away from it. Water enters the labyrinth inclined plate separation chamber through the inlet guide grid assembly and then flows into the clear water compartment for collection. The inlet guide grid assembly consists of a diamond-shaped baffle and multiple inlet guide grids. The inlet guide grid is composed of a guide module and a rear grid module. When the water flows through the guide module, it needs to rotate 180° to pass through the grid module and enter the water intake head. Large floating objects in the water will be carried away by the water flow due to their large mass and will not be able to enter the water intake head. The curvature of the water-facing surface of each guide module and the front and rear connected structure make the water flow form a vortex in front of the water inlet of the two grid plates when it flows through the inlet guide grid assembly, preventing small floating objects from entering the water intake head. The grid module also plays the role of preventing a few floating objects that pass through the vortex from entering the water intake head. The curvature of the two cylinder openings on one side of the guide module located at the bottom is greater than that of the two sides and the top side, so that the mud and sand deposited in the inlet guide grid assembly can slide off the curved surface naturally. The above design can effectively avoid the inlet clogging.

[0012] Furthermore, the inlet guide grid consists of a guide module and a rear grid module; the inclined plate array consists of several optimized labyrinth inclined plates and several lateral flow auxiliary inclined plates. The optimized labyrinth inclined plates and the lateral flow auxiliary inclined plates are inclined inward toward the central axis of the water intake head, with a horizontal inclination angle of 45°-60°; there is a spacing of 15-80mm between each optimized labyrinth inclined plate, a spacing of 5-40mm between each lateral flow auxiliary inclined plate, and a spacing of 15-80mm between the optimized labyrinth inclined plate on the outer side and the outer shell of the labyrinth inclined plate separation chamber.

[0013] After the water flows through the inlet guide grid assembly into the intake head, it passes through the inclined plate array. A large amount of sediment in the water settles on the inclined plates and slides into the flow-blocking bucket unit to be discharged from the intake head. The function of the flow-shortcoming baffle in the first-stage flow-blocking bucket is to prevent water flowing past the bottom of the inclined plate from bypassing the inclined plate array and reducing the treatment effect. The upward-flowing inclined plates and toothed reverse-flowing inclined plates in the second-stage and third-stage flow-blocking buckets also have this function.

[0014] Furthermore, the buoyancy upper shell consists of a buoyancy balancing unit and an anti-sinking float; the clear water compartment consists of a flow-rectifying transition plate, a clear water compartment shell, and a water collection unit; the water collection unit consists of a float, a corrugated pipe, and a connecting chain.

[0015] Furthermore, the guide module in the water inlet guide grid is cylindrical with no top or bottom surface. The two openings are different sizes, with the smaller opening side being the front and the larger opening side being the rear. The water inlet guide grid is assembled by connecting the front and rear. After the guide module is placed vertically, the arc connecting the two openings on one side of the guide module located on the bottom surface should be greater than that on both sides and the top side. The grid module is placed inside the cylindrical guide module perpendicular to the axis of the cylinder, and the edge of the grid module is in contact with the cylinder wall of the guide module.

[0016] Furthermore, the bottom of the labyrinth inclined plate separation chamber is a flow-blocking bucket unit, and an inclined plate array is installed above the flow-blocking bucket unit; the lower edges of both sides of the outer shell of the labyrinth inclined plate separation chamber are connected to the edges of both sides of the flow-blocking bucket unit, and the upper part of the inner side of the outer shell of the labyrinth inclined plate separation chamber is closely attached to the upper end of the inclined plate array.

[0017] Furthermore, the optimized maze ramp has the side where the water inlet guide grid group is located as the front, and the upper wing of the optimized maze ramp is perpendicular to the ramp and installed at equal intervals. The length of the wing is the same as the width of the ramp, and the height of the wing gradually increases from front to back.

[0018] Furthermore, the first-stage, second-stage, and third-stage flow-blocking hoppers have the same shape and opening, but different internal inserts; the opening length of the mud hopper of the first-stage, second-stage, and third-stage flow-blocking hoppers is the same as the length of the lower bottom edge of the trapezoidal cross-section of the labyrinth inclined plate separation chamber; the horizontal inclination angle of the four walls of the mud hopper of the first-stage, second-stage, and third-stage flow-blocking hoppers is the same, which is 45-60°. The first-stage, second-stage, and third-stage flow-blocking buckets have the same shape and opening, but the inlays inside are different. The first-stage flow-blocking bucket has several flow-shortening baffles, the second-stage flow-blocking bucket has several upward-flowing inclined plates, and the third-stage flow-blocking bucket has several toothed reverse-flowing inclined plates. The first-stage, second-stage, and third-stage flow-blocking buckets also have different arrangement positions. The side of the designated inlet guide grid group is in front of the water intake head, and the side of the clear water compartment is behind the water intake head. Several first-stage flow-blocking buckets form the front of the flow-blocking bucket unit, several second-stage flow-blocking buckets form the middle of the flow-blocking bucket unit, and several third-stage flow-blocking buckets form the rear of the flow-blocking bucket unit. This design aims to prevent a large amount of water from entering the sludge hopper through the sand discharge control port and then flowing directly into the clear water compartment without passing through a few inclined plates or even directly through the inclined plates, which would reduce the sand removal effect. Therefore, treatment measures (such as upward flow inclined plates) or measures that combine treatment and flow obstruction (toothed reverse flow obstruction inclined plates) are installed in the sludge hopper to increase the head loss of the water entering the sludge hopper, reduce the amount of short-flow water, and ensure the treatment effect. Short flows far from the clear water compartment are mostly treated by inclined plates, having little impact on water quality. This is the front of the first-stage flow-blocking hopper unit, where the sludge hopper is located. The short-flow baffles in this position have neither treatment nor flow-blocking functions. The sludge hopper in the middle, i.e. the second-stage flow-blocking hopper, has a moderate impact on sand removal efficiency when short flows occur. Therefore, only upward-flowing inclined plates with treatment functions are embedded inside the sludge hopper. However, short flows in the sludge hopper near the clear water compartment, i.e. the rear of the flow-blocking hopper unit where the third-stage flow-blocking hopper is located, have almost no flow-blocking treatment and will seriously affect the sand removal efficiency at the water intake head. Therefore, toothed reverse-flowing inclined plates with both treatment and flow-blocking functions are embedded inside the sludge hopper.

[0019] The primary, secondary, and tertiary flow-blocking buckets have different arrangement positions. The side of the designated inlet guide grid group is in front of the water intake head, and the side of the clear water compartment is behind the water intake head. Several primary flow-blocking buckets with their mud hopper openings facing upwards and their long sides connected side by side form the front part of the flow-blocking bucket unit. Several secondary flow-blocking buckets with their mud hopper openings facing upwards and their long sides connected side by side form the middle part of the flow-blocking bucket unit. Several tertiary flow-blocking buckets with their mud hopper openings facing upwards and their long sides connected side by side form the rear part of the flow-blocking bucket unit.

[0020] Furthermore, the flow-blocking baffle is a trapezoidal thin plate, and the water flow direction of the water intake head is specified as the water inlet guide grid group to the clear water compartment. The upper and lower bases of the trapezoidal baffle are perpendicular to the water flow direction. The flow-blocking baffle is connected to the inner side of the mud hopper water passage side wall of the first-stage flow-blocking hopper through the two sides of the trapezoidal baffle. After the flow-blocking baffle is installed, the lower end height is higher than the upper edge of the sand discharge control port.

[0021] The upward-flowing inclined plate is arranged with its long side of the trapezoidal base perpendicular to the water flow direction. The two sides of the upward-flowing inclined plate are connected to the inner sides of the two sides of the secondary flow-blocking hopper. With the designated inlet guide grid group as the front, the upward-flowing inclined plate is tilted backward, with the tilt angle consistent with the tilt angle of the four walls of the mud hopper, and the spacing between the inclined plates is equal. The toothed reverse-flowing inclined plate is an upward-flowing inclined plate with a toothed rack on the bottom surface. The rack is parallel to the upper and lower bottom edges of the trapezoidal base of the toothed reverse-flowing inclined plate and is arranged at equal intervals. The toothed surface is tilted relative to the bottom surface of the toothed reverse-flowing inclined plate towards the shorter bottom edge of the trapezoid, with the bottom surface of the toothed reverse-flowing inclined plate as the horizontal plane, and the horizontal tilt is 30-89°.

[0022] The bottom of the primary, secondary, and tertiary flow-blocking buckets is equipped with a sand discharge control port. The side of the mud bucket closest to the inlet guide grid is designated as the front sidewall of the mud bucket, and the side furthest from the inlet guide grid is designated as the rear sidewall of the mud bucket. The sand discharge control port is a trapezoidal strip opening located at the bottom of the rear sidewall of the mud bucket, with the bottom edge of the opening close to the inner side of the front sidewall of the mud bucket and 0.7-2cm upward along the back water surface. The two sides of the opening are close to the inner side of the water passage sidewall of the mud bucket.

[0023] Furthermore, the bottom surface of the rectifier transition plate has the same cross-sectional trapezoidal shape as the outer shell of the labyrinth inclined plate separation chamber, has a thickness of 1-4 cm, and has through holes perpendicular to the bottom surface. The shape of the through holes is not limited, and the porosity of the plate is higher than 70%. The rectifier transition plate is placed perpendicular to the axis of the labyrinth inclined plate separation chamber and inside the outer shell of the labyrinth inclined plate separation chamber, 20-200 mm behind the inclined plate array. Its upper part and both sides are closely attached to the inner side of the clear water compartment shell, and its height is consistent with that of the outer shell of the labyrinth inclined plate separation chamber.

[0024] The outer shell of the clear water compartment is connected to the outer shell of the labyrinth inclined plate separation chamber in front; the upper part and both sides of the outer shell of the clear water compartment are structurally consistent with the outer shell of the labyrinth inclined plate separation chamber; the rear part of the clear water compartment outer shell is a trapezoidal inclined surface, which is inclined forward with the upper bottom side (the shorter bottom side) of the trapezoid as the axis, and the horizontal inclination angle is greater than 40°; the rear inclined surface of the clear water compartment outer shell is provided with a water supply pipe interface; the lower edge of the clear water compartment outer shell is sealed and connected to the rear edge of the flow-blocking bucket unit.

[0025] The top surface of the clear water compartment is provided with a float limiting port in the middle. The edge of the float limiting port is raised around the float limiting port, and the height is 5-10mm higher than the thickness of the anti-sinking float. The upper end of the corrugated pipe is connected to the connecting chain, and the lower end is connected to the water supply pipe interface.

[0026] Furthermore, the buoyancy balancing unit is closely attached to both sides of the outer shell of the labyrinth inclined plate separation chamber, and its height is consistent with that of the outer shell of the labyrinth inclined plate separation chamber;

[0027] With the surface where the flow-blocking bucket unit is located as the bottom, the volume of the buoyancy balance unit gradually increases from bottom to top, and there is a buoyancy critical mark line at 1 / 3-3 / 4 of the height. With the buoyancy critical mark line as the boundary, the volume increase of the upper part is greater than that of the lower part.

[0028] The anti-sinking float is a column with a bottom shape that is the same as the shape of the upper part of the buoyancy balance unit and the upper part of the labyrinth inclined plate separation chamber shell. The height is determined according to the volume of the water intake head, ranging from 5 to 150 mm, and the bottom is placed above the labyrinth inclined plate separation chamber shell.

[0029] Water flows through the inclined plate array. Due to the extremely high sedimentation efficiency of the labyrinth inclined plates, a large amount of sediment in the water settles and slides into the flow-blocking bucket unit for discharge. The water flow treated by the inclined plate array enters the clear water compartment. The clear water compartment consists of a flow-rectifying transition plate, a clear water compartment shell, and a water collection unit. The cross-sectional area of ​​the clear water compartment is the same as that of the labyrinth inclined plate separation chamber. However, since the clear water compartment does not have winged inclined plates, its cross-sectional area is larger than that of the labyrinth inclined plate separation chamber. After the water flows into the clear water compartment, the flow velocity decreases due to the increased cross-sectional area, which is more conducive to sediment settling in the clear water compartment. However, at this time, there are a large number of vortices generated after the water flow passes through the inclined plate array, which is not conducive to sedimentation. The flow-rectifying transition plate plays a role. After the water flows through the straight holes on the flow-rectifying transition plate, the vortices are eliminated, the flow becomes stable, and the sediment is discharged after settling in the flow-blocking bucket unit. In the clear water compartment, the sediment content increases with water depth. Because the water intake head is floating, the liquid level in the clear water compartment changes depending on the head's movement. To obtain the upper layer of water, a water collection unit is installed. This unit consists of a float, a corrugated pipe, and a connecting chain. Regardless of the liquid level in the clear water compartment, the float always floats above the liquid level, ensuring that the corrugated pipe connected to the float always draws in the upper layer of clear water. The lower end of the corrugated pipe connects to a water delivery pipe interface, which in turn connects to a water delivery pipe that sends the collected clear water to the pumping station.

[0030] Compared with the prior art, the beneficial effects of this utility model are:

[0031] 1. This utility model's inlet guide grid consists of a guide module and a rear grid module. When the water flows through the guide module, it needs to rotate 180° to pass through the grid module and enter the water intake head. Large floating objects in the water are carried away by the water flow and cannot enter the water intake head. The curvature of the water-facing surface of each guide module and the front-to-back connection structure cause the water flow to form a vortex in front of the water inlet of the two grid plates when it flows through the inlet guide grid group, preventing small floating objects from entering the water intake head. The grid module also prevents a few floating objects that pass through the vortex from entering the water intake head. The curvature of the connection between the two cylinders on one side of the guide module located on the bottom surface is greater than that on the sides and the top. The mud and sand deposited in the inlet guide grid group naturally slide off the curved surface. The above measures can effectively prevent the water inlet from being blocked.

[0032] 2. After the water flows through the inlet guide grid assembly into the intake head, it passes through the inclined plate array. A large amount of sediment in the water settles on the inclined plates and slides into the flow-blocking bucket unit to be discharged from the intake head. The function of the flow-blocking baffle in the first-stage flow-blocking bucket is to prevent water flowing past the bottom of the inclined plates from bypassing the inclined plate array and reducing the treatment effect. The upward-flowing inclined plates and toothed reverse-flowing inclined plates in the second-stage and third-stage flow-blocking buckets also have this function.

[0033] 3. After a large amount of sediment settles in the water, it slides into the flow-blocking bucket unit and is discharged. After the water flows through the straight holes on the flow-rectifying transition plate, the vortex generated by the labyrinth inclined plate is eliminated, and the flow becomes stable, which is conducive to sedimentation. The characteristic of the subsequent water collection unit that only takes water from the upper layer further reduces the sediment content of the discharged water.

[0034] 4. A bar screen is used for water intake to increase the inlet area. Multiple inlet guide grids are combined to increase the inlet area, thereby reducing the head loss of the water flow entering from the inlet and reaching the clear water compartment through the inclined plate, thus increasing the amount of water treated. The design of the flow-blocking bucket unit and the measures of reducing the area of ​​the mud hopper sand discharge control port and designing the sand discharge control port on the back water surface also increase the head loss of the short-flow water and reduce the short-flow water volume.

[0035] 5. The buoyancy upper shell allows the intake head to float on the river surface, further reducing the sediment content of the incoming water. The buoyancy balancing unit is designed with a gradually increasing volume from bottom to top, enabling the intake head to dynamically adjust its draft during operation. This, in turn, adjusts the cross-sectional area of ​​the water flow within the intake head, regulates the water flow velocity, and ultimately adjusts the treatment effect to cope with changes in sediment content.

[0036] 6. The water intake head has a low overall height and strong anti-clogging ability, enabling it to stably extract water in shallow water where most water intake heads cannot operate. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of a pre-sedimentation water intake head for shallow water proposed in this utility model;

[0038] Figure 2 This is a side cross-sectional view of a pre-sedimentation water intake head for shallow water proposed in this utility model.

[0039] Figure 3 This is an exploded view of the overall structure of a pre-sedimentation water intake head for shallow water proposed in this utility model;

[0040] Figure 4 This is a schematic diagram of the overall structure of the inlet guide grid assembly of a pre-sedimentation water intake head for shallow water proposed in this utility model.

[0041] Figure 5This invention provides a schematic diagram and exploded view of a single inlet guide grid structure for a shallow water pre-sedimentation water intake head.

[0042] Figure 6 This is a cross-sectional view of a pre-sedimentation water intake head for shallow water proposed in this utility model;

[0043] Figure 7 This is a schematic diagram of the structure of a single blade inclined plate of a shallow water pre-sedimentation water intake head proposed in this utility model, from front to back.

[0044] Figure 8 This utility model presents a schematic diagram of a primary flow-blocking bucket, a secondary flow-blocking bucket, and a tertiary flow-blocking bucket for a shallow water pre-sedimentation water intake head, and the inlays inside the buckets: a flow-blocking baffle, an upward flow inclined plate, and a toothed reverse flow-blocking inclined plate.

[0045] Figure 9 This is an exploded view of the buoyancy upper shell of a pre-sedimentation water intake head for shallow water proposed in this utility model.

[0046] Figure 10 This is an exploded view of the clear water compartment of a pre-sedimentation water intake head for shallow water, as proposed in this utility model.

[0047] Explanation of reference numerals in the attached figures

[0048] Inlet flow guide grid assembly (1); labyrinth inclined plate separation chamber (2); buoyancy upper shell (3); clear water compartment (4); rhomboid baffle (12); inlet flow guide grid (11); flow guide module (111); grid module (112); flow obstruction bucket unit (22); inclined plate chamber sealing shell (24); inclined plate array (23); optimized labyrinth inclined plate (231); lateral flow auxiliary inclined plate (232); primary flow obstruction bucket (221); secondary flow obstruction bucket (222); tertiary flow obstruction bucket (223); flow blocking baffle (2211); upward flow inclined plate (2211). 21); Toothed anti-reverse inclined plate (2231); Rectifying transition plate (41); Clear water compartment sealing shell (42); Water collection unit (43); Float (431); Corrugated pipe (432); Connecting chain (433); Sand discharge control port (224); Mud hopper front side wall (225); Mud hopper rear side wall (226); Mud hopper water passage side wall (227); Buoyancy critical mark line (311); Buoyancy balance unit (31); Drag reduction float (33); Anti-sinking float (32); Float limit port (421); Water supply pipe interface (422). Detailed Implementation

[0049] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. In the description of the present utility model, it should be noted that the terms "first," "second," etc., are used for descriptive purposes only and do not specifically refer to any order or sequence, nor are they intended to limit the present utility model. They are merely used to distinguish components or operations described with the same technical terms, and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. The term "comprising" and any variations thereof in the specification, claims, and accompanying drawings of the present utility model are intended to cover non-exclusive inclusion.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "setting" should be interpreted broadly. For example, they can refer to fixed connections or detachable connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0051] In a relatively shallow surface water embodiment, see [link to example]. Figure 1 As shown, this utility model discloses a shallow-water floating pre-sedimentation water intake head, comprising an inlet guide grid assembly 1, a labyrinth inclined plate separation chamber 2, a buoyancy upper shell 3, and a clear water compartment 4. The inlet guide grid assembly 1 is connected to the labyrinth inclined plate separation chamber 2, with the upper shell of the labyrinth inclined plate separation chamber 2 covering the buoyancy upper shell 3. The labyrinth inclined plate separation chamber 2 has the inlet guide grid assembly 1 as its front end and the clear water compartment 4 as its rear end. The inlet guide grid assembly 1, the labyrinth inclined plate separation chamber 2, and the clear water compartment 4 are connected to form an internal channel through which water flows sequentially. The water intake head is placed in the water flow with the inlet guide grid assembly at the front and the clear water compartment at the rear, facing the water flow. After entering the labyrinth inclined plate separation chamber from the inlet guide grid assembly, the water flows into the clear water compartment and is collected.

[0052] like Figure 1 The inlet guide plate group 1 consists of a diamond-shaped baffle 12 and multiple inlet guide plates 11. For example... Figure 5 The water inlet guide grid 11 is composed of the guide module 111 and the rear grid module 112.

[0053] The labyrinth inclined plate separation chamber 2 consists of a flow-blocking bucket unit 22, a labyrinth inclined plate separation chamber shell 24, and an inclined plate array 23.

[0054] The inclined plate array 23 consists of several optimized labyrinth inclined plates 231 and several lateral flow auxiliary inclined plates 232. The optimized labyrinth inclined plates 231 and the lateral flow auxiliary inclined plates 232 are inclined inward toward the central axis of the water intake head, with a horizontal inclination angle of 45°-60°. There is a 15-80mm gap between each optimized labyrinth inclined plate 231, a 5-40mm gap between each lateral flow auxiliary inclined plate 232, and a 15-80mm gap between the optimized labyrinth inclined plate 231 on the outer side and the outer shell 24 of the labyrinth inclined plate separation chamber.

[0055] The flow-blocking bucket unit 22 consists of several primary flow-blocking buckets 221, secondary flow-blocking buckets 222, and tertiary flow-blocking buckets 223;

[0056] The first-stage flow-blocking bucket 221 is inlaid with several flow-shortening baffles 2211; the second-stage flow-blocking bucket 222 is inlaid with several upward-flowing inclined plates 2221; and the third-stage flow-blocking bucket 223 is inlaid with several toothed reverse-flowing inclined plates 2231.

[0057] The buoyancy upper shell 3 consists of a buoyancy balance unit 31 and an anti-sinking float 32. The clear water compartment 4 consists of a flow-rectifying transition plate 41, a clear water compartment shell 42, and a water collection unit 43.

[0058] like Figure 5 As shown, the guide module 111 in the inlet guide grille 11 is cylindrical, without upper or lower bottom surfaces, and has two openings of different sizes. The side with the smaller opening is the front, and the side with the larger opening is the rear. Water enters from the side with the larger opening. Figure 4 The inlet guide grid 11 is assembled in a front-to-back connection. After this assembly, the water flow needs to rotate 180° when it flows through the guide module and enter the water intake head through the large opening side. Large floating objects in the water will be carried away by the water flow due to their large mass and will not be able to enter the water intake head. The curvature of the water-facing surface of each guide module and the front-to-back connection structure cause the water flow to form a vortex in front of the water inlet of the two grid plates when it flows through the inlet guide grid assembly, preventing small floating objects from entering the water intake head.

[0059] After the flow guide module 111 is placed vertically, the arc of the connection between the two cylinders on one side of the flow guide module at the bottom is designed to be greater than that on both sides and the top, so that the mud and sand deposited in the water inlet flow guide grid group can slide off the arc surface naturally.

[0060] The grid module 112 is placed inside the cylindrical guide module 111 with its vertical axis perpendicular to the cylinder. The edge of the grid module 112 is in contact with the cylinder wall of the guide module 111. The grid module 112 also serves to block a small number of floating objects that pass through the vortex formed in front of the water inlet from entering the water intake head. All of the above measures effectively reduce the possibility of the water intake head being blocked.

[0061] like Figure 3 The bottom of the labyrinth inclined plate separation chamber 2 is a flow-blocking bucket unit 22, and an inclined plate array 23 is installed above the flow-blocking bucket unit 22; the lower edges of both sides of the labyrinth inclined plate separation chamber shell 24 are connected to the edges of both sides of the flow-blocking bucket unit 22, and the upper part of the inner side of the labyrinth inclined plate separation chamber shell 24 is closely attached to the upper end of the inclined plate array 23.

[0062] like Figure 3 The optimized labyrinth ramp 231 has its front side located on the side where the water inlet guide grid group 1 is located. The upper fins of the optimized labyrinth ramp 231 are perpendicular to the ramp and equidistantly installed. The length of the fins is the same as the width of the ramp. Figure 7 The vane height gradually increases from front to back. Within a certain range, the vane height determines the treatment effect of the inclined plates. The water flowing into the labyrinth inclined plate separation chamber 2 from the inlet guide grid group 1 is untreated, with the highest sediment content, severely increasing the sludge discharge pressure in the front zone of the flow-blocking bucket unit 22. This easily causes blockage of the sand discharge control port. Furthermore, the complete sedimentation of sediment in the initial stage reduces the utilization rate of the rear inclined plates and sludge bucket. To avoid this, the volume of the front sludge bucket can be increased, and the number of rear inclined plates and the volume of the sludge bucket can be reduced. However, increasing the sludge bucket volume inevitably increases the overall height of the water intake head, which is detrimental to use in shallow water. To solve the above problems while meeting the requirements for use in shallow water, reducing the treatment efficiency of the front vane inclined plates, thereby reducing the sediment settling in the front zone, increasing the treatment efficiency of the rear vane inclined plates, and improving the utilization rate of the rear inclined plates and sludge bucket, the vane height is designed to gradually increase from front to back. This design also ensures a uniform mass distribution of the water intake head, increasing the stability of the water intake head floating in the water.

[0063] like Figure 8 As shown: The first-stage flow-blocking hopper 221, the second-stage flow-blocking hopper 222, and the third-stage flow-blocking hopper 223 have the same shape and opening, but different internal inserts. The different internal inserts determine the functions of the corresponding mud hoppers other than mud discharge and mud storage.

[0064] The flow-shortening baffle 2211 is a trapezoidal thin plate, specifying the water flow direction at the water intake head as from the inlet guide grid group 1 to the clear water compartment 4. The upper and lower bases of the trapezoidal baffle 2211 are perpendicular to the water flow direction. The flow-shortening baffle 2211 is connected to the inner side of the mud hopper overflow sidewall 227 of the first-stage flow-shortening bucket 221 through the two sides of the trapezoidal baffle 2211. After installation, the lower end of the flow-shortening baffle 2211 is higher than the upper edge of the sand discharge control port 224. The design of the flow-shortening baffle 2211 prevents water flowing through the bottom of the inclined plate from bypassing the inclined plate array 23 by flowing through the first-stage flow-shortening bucket 221, thus reducing the treatment effect. The upward-flowing inclined plate 2221 and the toothed reverse-flowing inclined plate 2231 in the second-stage flow-shortening bucket 222 and the third-stage flow-shortening bucket 223 also have this function.

[0065] like Figure 8 The upward-flowing inclined plate 2221 is arranged with its long bottom edge perpendicular to the water flow direction. Both sides of the upward-flowing inclined plate 2221 are connected to the inner sides 225 of the two sides of the secondary flow-blocking hopper 222. With the designated inlet guide grid group 1 as the front, the upward-flowing inclined plate 2221 tilts backward at the same angle as the four walls of the mud hopper, with equal spacing between the inclined plates. The toothed reverse-flowing inclined plate 2231 is an upward-flowing inclined plate 2221 with teeth on its bottom surface. Several toothed racks are arranged parallel to the upper and lower bottom edges of the trapezoidal base of the toothed reverse-flowing inclined plate 2231, with equal spacing between them. The toothed surfaces are inclined relative to the shorter bottom edge of the trapezoid, with the bottom surface of the toothed reverse-flowing inclined plate 2231 as the horizontal plane, with a horizontal inclination of 30-89°.

[0066] like Figure 2 The primary flow-blocking bucket 221, the secondary flow-blocking bucket 222, and the tertiary flow-blocking bucket 223 have different arrangement positions. The side of the designated inlet guide grid group 1 is in front of the water intake head, and the side of the clear water compartment 4 is behind the water intake head. The mud buckets of several primary flow-blocking buckets 221 with their mud bucket openings facing upwards and their long sides connected side by side form the front part of the flow-blocking bucket unit 22. The mud buckets of several secondary flow-blocking buckets 222 with their mud bucket openings facing upwards and their long sides connected side by side form the middle part of the flow-blocking bucket unit 22. The mud buckets of several tertiary flow-blocking buckets 223 with their mud bucket openings facing upwards and their long sides connected side by side form the rear part of the flow-blocking bucket unit 22.

[0067] The design of the upward flow inclined plate 2221 and the toothed reverse flow obstruction inclined plate 2231 is intended to prevent a large amount of water from entering the mud hopper sand discharge control port and entering the clear water compartment 4 directly without passing through a few inclined plates or without passing through the inclined plates, which would reduce the sand removal effect. Therefore, treatment measures (such as upward flow inclined plates) or measures that combine treatment and flow obstruction (toothed reverse flow obstruction inclined plates) are set in the mud hopper to increase the head loss of the mud hopper water intake, reduce the amount of short flow water, and ensure the treatment effect. Short flows away from the clear water compartment 4 are mostly treated by inclined plates, having little impact on water quality. This is the front of the first-stage flow-blocking hopper unit where the first-stage flow-blocking hopper 221 is located. Therefore, a short-flow-blocking baffle 2211, which has neither treatment nor flow-blocking function, is installed inside the sludge hopper at this location. Short flows in the middle sludge hopper, i.e., the second-stage flow-blocking hopper 222, have a moderate impact on sand removal. Therefore, only an upward-flowing inclined plate 2221 with treatment function is installed inside the sludge hopper. Short flows in the sludge hopper near the clear water compartment side, i.e., the rear of the flow-blocking hopper unit where the third-stage flow-blocking hopper 223 is located, have almost no flow-blocking treatment and will seriously affect the sand removal effect at the water intake head. Therefore, a toothed reverse-flow blocking inclined plate 2231 with both treatment and flow-blocking function is installed inside the sludge hopper. Furthermore, when the sediment content in the water is high, the sediment in the hopper also has a certain ability to prevent backflow and short flows. When the sediment content in the water is low, although the sediment in the hopper is low and the ability to prevent backflow and short flows is reduced, the impact of short flows is also smaller.

[0068] The bottoms of the primary flow-blocking hopper 221, the secondary flow-blocking hopper 222, and the tertiary flow-blocking hopper 223 are all equipped with... Figure 8 The sand discharge control port 224 is shown. The side of the mud hopper closest to the inlet guide grid group 1 is the water-facing side 225, and the side furthest from the inlet guide grid group 1 is the back-water side 226. The sand discharge control port 224 is a trapezoidal elongated opening located at the bottom of the rear sidewall 226 of the mud hopper. The bottom edge of the opening is close to the inner side of the front sidewall 225 of the mud hopper and extends upwards 0.7-2 cm along the back-water side 226. Both sides of the opening are close to the inner side of the water-passing sidewall 227 of the mud hopper. Reducing the area of ​​the sand discharge control port and designing it on the back-water side forces the water entering from the sand discharge control port to turn 180° around the bottom of the mud hopper, increasing the head loss of this short-flow water and reducing the short-flow volume. Keeping the area of ​​the sand discharge control port as small as possible without affecting mud discharge also increases the head loss of the short-flow water and reduces the short-flow volume.

[0069] The opening lengths of the mud hoppers of the first-stage flow-blocking hopper 221, the second-stage flow-blocking hopper 222, and the third-stage flow-blocking hopper 223 are consistent with the length of the lower bottom edge of the trapezoidal cross-section of the labyrinth inclined plate separation chamber shell 24; the horizontal inclination angles of the four walls of the mud hoppers of the first-stage flow-blocking hopper 221, the second-stage flow-blocking hopper 222, and the third-stage flow-blocking hopper 223 are consistent, ranging from 45° to 60°.

[0070] like Figure 1 , 2As shown, the bottom surface of the rectifier transition plate 41 has the same trapezoidal cross-section as the labyrinth inclined plate separation chamber shell 24, with a thickness of 1-4 cm and through holes perpendicular to the bottom surface. The shape of the through holes is not limited, and the porosity of the plate is higher than 70%. The rectifier transition plate 41 is positioned perpendicular to the axis of the labyrinth inclined plate separation chamber shell 24, inside the labyrinth inclined plate separation chamber shell 24, 20-200 mm behind the inclined plate array 23. Its upper part and both sides are closely fitted with the inner side of the clear water compartment shell 42, and its height is consistent with that of the labyrinth inclined plate separation chamber shell 24. The large number of eddies generated after the water flows through the inclined plate array are not conducive to sedimentation. After flowing through the straight holes on the rectifier transition plate, the eddies are eliminated, the flow becomes stable, and sediment is more likely to settle in the clear water compartment.

[0071] like Figure 1 , 2 As shown, the clear water compartment shell 42 is connected to the labyrinth inclined plate separation chamber shell 24 in front; the upper part and both sides of the clear water compartment shell 42 have the same structure as the labyrinth inclined plate separation chamber shell 24; the rear part of the clear water compartment shell 42 is a trapezoidal inclined surface, which is inclined forward with the upper bottom edge (shorter bottom edge) of the trapezoid as the axis, and the horizontal inclination angle is greater than 40°; the rear inclined surface of the clear water compartment shell 42 is provided with a water supply pipe interface 422; the lower edge of the clear water compartment shell 42 is sealed to the rear edge of the flow-blocking bucket unit 22.

[0072] like Figure 10 As shown, a float limit port 421 is provided in the middle of the top surface of the clear water compartment shell 42 to ensure that when the water intake head has a deep draft and the water flow inside the water intake head is full, the float 431 can still float on the water surface through the opening of the float limit port 421, so that the corrugated pipe 432 connected to it can stably take up the upper layer of clear water.

[0073] like Figure 10 As shown, a raised ring encircles the edge of the float limiting port 421, with a height exceeding the thickness of the anti-sinking float 32 by 5-10mm. This prevents rainwater or river water from entering the clear water compartment through the float limiting port 421 when the water intake head is in deep water. The upper end of the corrugated pipe 432 is connected to the connecting chain 433, and the lower end is connected to the water supply pipe interface 422, which can be connected to a water supply pipe.

[0074] like Figure 9The buoyancy balancing unit 31 is closely attached to both sides of the outer shell 24 of the labyrinth inclined plate separation chamber, with the same height as the outer shell 24. The surface where the designated flow-blocking bucket unit 22 is located is the bottom, and the surface where the anti-sinking float 32 is located is the top. The volume of the buoyancy balancing unit 31 gradually increases from bottom to top, and a critical buoyancy indicator line 311 exists at 1 / 3-3 / 4 of its height. The volume increase above this critical buoyancy indicator line 311 is greater than that below. The purpose of setting the critical buoyancy indicator line 311 is that the volume increase of the float below the critical buoyancy indicator line 311 is relatively small, resulting in a low change in buoyancy. This design ensures that even when the sediment content in the water is very low, the water intake head still has a certain draft due to its own weight, allowing the water level to exceed the critical buoyancy indicator line 311, thus avoiding insufficient water intake or excessive air bubbles in the water supply pipe due to shallow draft. The volume increase of the float above the critical buoyancy indicator line 311 is significantly larger, and the volume increase depends on the sediment content variation at the location of use.

[0075] like Figure 9 The anti-sinking float 32 is a column with a bottom shape that is the same as the shape of the upper part of the buoyancy balance unit 31 and the upper part of the labyrinth inclined plate separation chamber shell 24 after combination. The height is determined according to the volume of the water intake head, ranging from 5 to 150 mm, and the bottom is placed above the labyrinth inclined plate separation chamber shell 24.

[0076] like Figure 9 The drag-reducing float 33 is a conical or streamlined cone, connected to the tail of the clear water compartment shell 42. Its design purpose is to avoid the Karman vortex street generated at the rear of the water intake head due to excessive water flow speed, which would affect the stability of the water intake head in the water.

[0077] The buoyancy upper shell 3 keeps the intake head floating on the river surface, further reducing the sediment content of the incoming water. The buoyancy upper shell 3 consists of a buoyancy balance unit 31 and an anti-sinking float 32. During the initial sedimentation process, the weight of the intake head increases due to sediment deposition on the inclined plate and accumulation in the hopper. Once the sediment begins to be discharged from the hopper and the discharge rate balances the inflow, the weight of the intake head stops increasing. Therefore, the increase in weight of the intake head depends on the sediment content in the river. To cope with changes in sediment content, the buoyancy balance unit is designed to gradually increase in volume from bottom to top, allowing the intake head to dynamically adjust its draft during operation. This adjusts the cross-sectional area of ​​the water flow within the intake head, regulates the flow velocity, and ultimately adjusts the treatment effect to address changes in sediment content. For example, when the sediment content in the river increases, the weight of the intake head increases, the draft deepens, the cross-sectional area of ​​the water flow increases, the flow velocity decreases, and the sedimentation effect is enhanced. The anti-sinking buoy ensures that the water intake head can float on the water surface when operating under overload conditions where the sediment content exceeds the maximum treatment capacity.

[0078] In the clear water compartment 4, the sediment content increases with water depth. Since the water intake head is floating, the liquid level in the clear water compartment 4 changes depending on the rise and fall of the intake head. Therefore, a water collection unit 43 is installed to obtain the upper layer of water. Figure 10 The water collection unit 43 consists of a float 431, a corrugated pipe 432, and a connecting chain 433. Regardless of changes in the liquid level in the clear water compartment 4, the float 431 always floats above the liquid level, ensuring that the corrugated pipe 432 connected to the float 431 always draws the upper layer of clear water. The lower end of the corrugated pipe 432 is connected to a water delivery pipe interface 422, and a water delivery pipe is connected after the water delivery pipe interface 422 to deliver the collected clear water to the pumping station.

[0079] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A floating pre-sedimentation water intake head for shallow water, characterized in that: It includes an inlet guide grid assembly (1), a labyrinth inclined plate separation chamber (2), a buoyancy upper shell (3), and a clear water compartment (4); The water inlet guide grid group (1) is connected to the labyrinth inclined plate separation chamber (2). The upper shell of the labyrinth inclined plate separation chamber (2) is covered by the buoyancy upper shell (3). The labyrinth inclined plate separation chamber (2) has the water inlet guide grid group (1) as the front end and the rear end connected to the clear water compartment (4). The inlet guide grid group (1) consists of a rhomboid baffle (12) and multiple inlet guide grids (11); the labyrinth inclined plate separation chamber (2) consists of a flow-blocking bucket unit (22), a labyrinth inclined plate separation chamber shell (24), and an inclined plate array (23); The flow-blocking bucket unit (22) consists of several primary flow-blocking buckets (221), secondary flow-blocking buckets (222), and tertiary flow-blocking buckets (223); The first-stage flow-blocking bucket (221) is inlaid with several flow-shortening baffles (2211); the second-stage flow-blocking bucket (222) is inlaid with several upward-flowing inclined plates (2221); and the third-stage flow-blocking bucket (223) is inlaid with several toothed reverse-flowing inclined plates (2231).

2. The floating pre-sedimentation water intake head for shallow water according to claim 1, characterized in that: The inlet flow guide grid (11) is composed of a flow guide module (111) and a rear grid module (112); the inclined plate array (23) is composed of several optimized labyrinth inclined plates (231) and several lateral flow auxiliary inclined plates (232).

3. The floating pre-sedimentation water intake head for shallow water according to claim 1, characterized in that: The buoyancy shell (3) is composed of a buoyancy balance unit (31) and an anti-sinking float (32); the clear water compartment (4) is composed of a flow-rectifying transition plate (41), a clear water compartment shell (42), and a water collection unit (43); the water collection unit (43) is composed of a float (431), a corrugated pipe (432), and a connecting chain (433).

4. The floating pre-sedimentation water intake head for shallow water according to claim 2, characterized in that: The inlet guide grid (11) has a cylindrical guide module (111) without an upper or lower bottom surface. The two cylindrical openings are different sizes, with the smaller opening side being the front and the larger opening side being the rear. The inlet guide grid (11) is assembled in a front-to-back connection. After the guide module (111) is placed vertically, the arc of the connection between the two cylindrical openings on one side of the guide module located on the bottom surface is greater than that on both sides and the top side. The grid module (112) is placed inside the cylindrical guide module (111) perpendicular to the axis of the cylinder, and the edge of the grid module (112) is in contact with the cylinder wall of the guide module (111).

5. The floating pre-sedimentation water intake head for shallow water according to claim 1, characterized in that: The bottom of the labyrinth inclined plate separation chamber (2) is a flow-blocking bucket unit (22), and an inclined plate array (23) is installed above the flow-blocking bucket unit (22); the lower edges of the two sides of the labyrinth inclined plate separation chamber shell (24) are connected to the two sides of the flow-blocking bucket unit (22), and the upper part of the inner side of the labyrinth inclined plate separation chamber shell (24) is closely attached to the upper end of the inclined plate array (23).

6. The floating pre-sedimentation water intake head for shallow water according to claim 2, characterized in that: The optimized maze ramp (231) has the side where the water inlet guide grid group (1) is located as the front. The upper wing of the optimized maze ramp (231) is perpendicular to the ramp and is installed at equal intervals. The length of the wing is the same as the width of the ramp, and the height of the wing gradually increases from front to back.

7. The floating pre-sedimentation water intake head for shallow water according to claim 1, characterized in that: The mud buckets of several primary flow-blocking buckets (221) have their mud bucket openings facing upwards and their long sides connected and arranged side by side to form the front part of the flow-blocking bucket unit (22). The mud buckets of several secondary flow-blocking buckets (222) have their mud bucket openings facing upwards and their long sides connected and arranged side by side to form the middle part of the flow-blocking bucket unit (22). The mud buckets of several tertiary flow-blocking buckets (223) have their mud bucket openings facing upwards and their long sides connected and arranged side by side to form the rear part of the flow-blocking bucket unit (22).

8. The floating pre-sedimentation water intake head for shallow water according to claim 1, characterized in that: The flow-blocking baffle (2211) is a trapezoidal thin plate. The upper and lower bases of the trapezoidal baffle (2211) are perpendicular to the water flow direction. The flow-blocking baffle (2211) is connected to the inner side of the mud hopper water passage side wall (227) of the first-stage flow-blocking bucket (221) through the two sides of the trapezoidal baffle (2211). After installation, the lower end of the flow-blocking baffle (2211) is higher than the upper edge of the sand discharge control port (224). The trapezoidal base of the upward-flowing inclined plate (2221) is arranged perpendicular to the direction of water flow. The toothed obstruction plate (2231) is an upward flow obstruction plate (2221) with toothed bars on the bottom surface. The toothed bars are parallel to the upper and lower trapezoidal bottom edges of the toothed obstruction plate (2231) and are arranged at equal intervals. The bottom of the first-stage obstruction bucket (221), the second-stage obstruction bucket (222), and the third-stage obstruction bucket (223) are all provided with sand discharge control ports (224). The side of the mud bucket closest to the inlet guide grid group (1) is the front sidewall (225) of the mud bucket, and the side away from the inlet guide grid group (1) is the rear sidewall (226) of the mud bucket.

9. The floating pre-sedimentation water intake head for shallow water according to claim 3, characterized in that: The rectifier transition plate (41) is placed inside the labyrinth inclined plate separation chamber shell (24) perpendicular to the axis of the labyrinth inclined plate separation chamber shell (24), 20-200mm behind the inclined plate array (23), with its upper part and both sides closely attached to the inner side of the clear water compartment shell (42), and its height is consistent with that of the labyrinth inclined plate separation chamber shell (24). The outer shell (42) of the clear water compartment is connected to the outer shell (24) of the labyrinth inclined plate separation chamber in front; the upper part and both sides of the clear water compartment outer shell (42) have the same structure as the outer shell (24) of the labyrinth inclined plate separation chamber; the rear part of the clear water compartment outer shell (42) is a trapezoidal inclined surface; The top surface of the clear water compartment shell (42) is provided with a float limiting port (421). The edge of the float limiting port (421) is raised to form a superelevation around the float limiting port (421), which is 5-10 mm higher than the thickness of the anti-sinking float (32). The upper end of the corrugated pipe (432) is connected to the connecting chain (433), and the lower end is connected to the water supply pipe interface (422).

10. The floating pre-sedimentation water intake head for shallow water according to claim 3, characterized in that: The buoyancy balance unit (31) is attached to both sides of the outer shell (24) of the labyrinth inclined plate separation chamber, and its height is the same as that of the outer shell (24); the anti-sinking float (32) is a column with its bottom surface placed above the outer shell (24) of the labyrinth inclined plate separation chamber.

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