A shallow water dynamic sand removal and water intake head

Abstract

The present invention provides a shallow water dynamic sand removal and water intake head, wherein the water inlet grating group is connected to the wing ramp chamber, the upper shell of the wing ramp chamber covers the float shell, the wing ramp chamber has the water inlet grating group as the front end, and the rear end is connected to the water collection chamber; the water inlet grating group is composed of a baffle plate and a plurality of water inlet gratings, and the water inlet grating is composed of a grille inlaid at the rear of the guide plate; the wing ramp chamber is composed of a flow-blocking mud bucket group, a wing ramp group and a wing ramp chamber shell; the wing ramp group is composed of a plurality of lateral flow wing ramps and a plurality of lateral flow ramps. The water intake head can not only prevent floating objects of various volumes from entering the water intake head and reduce the sediment content, but also has strong anti-clogging ability; it can also fully adapt to the application environment of shallow water flow; and can autonomously adjust to adapt to changes when the water flow depth and sediment content change during the rainy and flood seasons.

Description

Technical Field

[0001] The invention relates to the technical field of water intake heads, in particular to a shallow water dynamic sand removal water intake head. Background Art

[0002] Shallow rivers such as streams are the main water supply sources for mountainous villages and towns. The turbidity, microbial content and water quality of these water sources are different during the rainy season and the dry season. The investment cost of water plant structures built based on the rainy season water quality standard is high, and these structures have the problem of low utilization rate during the dry season when the water quality is better.

[0003] The water intake head is a key part of the water supply system. The existing water intake heads such as trumpet-shaped, mushroom-shaped, fish-shaped, box-shaped and pier-shaped ones only have the function of intercepting large-volume floating objects, and the inclined plate-type water intake head with a certain sediment treatment capacity has a very high water depth requirement (Water Supply Engineering: In order to avoid the movement of sediment, the lower edge of the side water inlet hole should be higher than the river bottom, generally not less than 0.5m, and the top water inlet hole should be higher than the river bottom by more than 1.0~1.5m). It cannot be used in the shallow surface water in mountainous areas during the dry season. In order to ensure stable water intake in the surface water in mountainous areas at this time, weirs or hoppers are generally set up to increase the water depth to meet the depth requirements of conventional water intake heads, which undoubtedly increases the water intake cost. The cost and engineering volume are high, and the water volume increases during the rainy season. Although the surface water depth meets the depth requirements of conventional water intake heads, the flood carries a large amount of sediment and floating objects, which still cause blockage and siltation in the weir and hopper. The sediment in the water enters the water pump through the water intake head, causing wear on the water flow part of the water pump, which greatly reduces the service life of the water pump. Even in a gravity-driven water plant, sediment precipitation in the structure and equipment will affect the equipment operation and the water quality of the incoming water, and even cause blockage. Some rivers and streams also have small floating objects in the surface water that cannot be removed by conventional water intake heads. Too many floating objects in the water will block the water inlet hole of the water intake head. When the floating objects enter the water pump with the water flow, they will also entangle the impeller, affecting the normal operation of the water plant.

[0004] Therefore, there is an urgent need for a water intake head with dynamic adjustment and treatment capabilities. It is required to maintain stable water intake during the dry season in mountainous areas when surface water flows are low and water depths are shallow, with little or no sediment treatment capacity; while also providing efficient sediment treatment capabilities during the rainy season when surface water depths meet the depth requirements of conventional water intake heads. This can 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 be resistant to clogging to ensure long-term stable operation. Summary of the Invention

[0005] The purpose of the present invention is to provide a shallow water dynamic sand removal water intake head to solve the problems that the existing water intake head cannot be used in shallow water and cannot reduce the sand content of the incoming water and is prone to clogging after long-term use.

[0006] To achieve the above-mentioned object, the present invention provides a shallow water dynamic sand removal and water intake head, comprising a water inlet grid plate group, a vane inclined plate chamber, a float housing and a water collection chamber; the water inlet grid plate group is connected to the vane inclined plate chamber, the vane inclined plate chamber upper shell covers the float housing, the vane inclined plate chamber has the water inlet grid plate group as the front end, and the rear end is connected to the water collection chamber;

[0007] The water inlet grid plate group, the vane inclined plate chamber and the water collecting chamber are connected to form a channel with water supply flow passing through the water inlet grid plate group, the vane inclined plate chamber and the water collecting chamber in sequence.

[0008] The present invention comprises an inlet grating assembly, a vane and sloping plate chamber, a float housing, and a water collection chamber. The inlet grating assembly is positioned at the head, and the water collection chamber is positioned at the tail, in the water flow, with the head facing the water and the tail facing away from the water. Water flows from the inlet grating assembly into the vane and sloping plate chamber, then flows into the water collection chamber for collection. The water inlet grating group consists of a baffle plate and multiple water inlet gratings. The water inlet grating is composed of a grille inlaid at the rear of the guide plate. When flowing through the guide plate, the water needs to rotate 180° to pass through the inlaid grille to enter the water intake head. Large floating objects in the water will flow along with the water flow due to their large mass and cannot enter the water intake head; the curvature of the water-facing surface of each guide plate and the front and rear connected structure make the water form a vortex in front of the water inlet of the two gratings when flowing through the water inlet grating group, preventing small floating objects from entering the water intake head, and the inlaid grille also plays a role in preventing a small number of floating objects that pass through the vortex from entering the water intake head; the curvature of the connection between the two barrel openings on one side of the guide plate located at the bottom is greater than the two sides and the upper side, so that the mud and sand deposited in the water inlet grating group can naturally slide down the curved surface. The above design can effectively avoid blockage of the water inlet.

[0009] The water inlet grating group consists of a baffle plate and multiple water inlet gratings, and the water inlet grating is composed of a grille inlaid at the rear of the guide plate; the wing ramp chamber is composed of a flow-blocking mud bucket group, a wing ramp group and a wing ramp chamber shell; the wing ramp group is composed of a plurality of lateral flow wing ramps and a plurality of lateral flow ramps.

[0010] The water flows through the vane inclined plate group, and thanks to the extremely high sedimentation efficiency of the vane inclined plate, a large amount of sediment in the water settles and slides into the flow-blocking mud bucket group to be discharged. The water processed by the vane inclined plate group enters the water collection chamber, which is composed of a flow stabilizer, a water collection chamber shell and a water collection component. The cross-sectional area of ​​the water collection chamber is consistent with that of the vane inclined plate chamber, but since the water collection chamber is not installed with vane inclined plates, the water flow cross-sectional area is larger than that of the vane inclined plate chamber. After the water flows into the water collection chamber, the flow rate decreases due to the increase in the water flow cross-sectional area, which is more conducive to the sedimentation of the sediment in the water collection chamber. However, at this time, there are a large number of vortices in the water flow generated after passing through the vane inclined plate group, which is not conducive to sedimentation. The flow stabilizer plays a role: after the water flows through the straight holes on the flow stabilizer, the vortex is eliminated, the flow state becomes smooth, and the sediment settles after the flow-blocking mud bucket group and is discharged. In the water collection chamber, sediment content increases with water depth. Because the water intake head is floating, the liquid level in the water collection chamber fluctuates with the rise and fall of the intake head. To capture the upper layer of water, a water collection assembly is installed. The assembly consists of a float, a hose, and connectors. Regardless of how the liquid level in the water collection chamber fluctuates, the float always floats above the liquid level, allowing the hose below the float to continuously capture the upper layer of clean water. The lower end of the hose is connected to a connector, which is then connected to a water pipe, which delivers the captured clean water to the pumping station.

[0011] Furthermore, the flow-blocking mud bucket group consists of a plurality of first flow-blocking mud buckets, a second flow-blocking mud bucket and a third flow-blocking mud bucket; a plurality of anti-short-flow plates are embedded in the first flow-blocking mud bucket; a plurality of upstream inclined plates are embedded in the second flow-blocking mud bucket; and a plurality of flow-blocking inclined plates are embedded in the third flow-blocking mud bucket.

[0012] After water flows through the inlet grating assembly into the intake head and then passes through the vane and swash plate assembly, a large amount of sediment in the water settles on the swash plates and slides into the flow-blocking hopper assembly to be discharged from the intake head. The short-flow prevention plate in the first flow-blocking hopper prevents water that has passed the bottom of the swash plate from bypassing the vane and swash plate assembly by flowing through the first flow-blocking hopper, thereby reducing treatment efficiency. The upstream swash plates and flow-blocking swash plates in the second and third flow-blocking hoppers also perform this function.

[0013] Furthermore, the lateral flow wing inclined plates and the lateral flow inclined plates are inclined inwardly toward the central axis of the water intake head, and the horizontal inclination angles are both 45°-60°; there is a 15-80mm spacing between each lateral flow wing inclined plate, a 5-40mm spacing between each lateral flow inclined plate, and a 15-80mm spacing between the outer lateral flow wing inclined plates and the wing inclined plate chamber outer shell.

[0014] Furthermore, the float housing is composed of floats on both sides and a limit float; the water collecting chamber is composed of a flow stabilizing plate, a water collecting chamber housing and a water collecting component; the water collecting component is composed of a float, a hose and a connector.

[0015] Furthermore, the guide plate in the water inlet grid is cylindrical, without upper and lower bottom surfaces, and the two tube openings are of different sizes, the small opening side is in the front, and the large opening side is in the rear, and the water inlet grid is combined in a front-to-back manner; after the guide plate is placed vertically, the horizontal plane where the upper side of the tube opening on the rear large opening side is located is higher than the horizontal plane where the upper side of the tube opening on the front small opening side is located, and the horizontal plane where the bottom side of the tube opening on the rear large opening side is located is lower than the horizontal plane where the bottom side of the tube opening on the front small opening side is located, and the distance where the horizontal plane where the bottom side of the tube opening on the rear large opening side is lower than the horizontal plane where the bottom side of the tube opening on the front small opening side is A, and the distance where the upper side of the tube opening on the rear large opening side is higher than the horizontal plane where the upper side of the tube opening on the front small opening side is B, A is greater than B, and the inlaid grille is placed in the tube of the cylindrical guide plate perpendicular to the axis of the cylinder, and the edge of the inlaid grille is in contact with the tube wall of the guide plate.

[0016] The bottom of the vane inclined plate chamber is a choke mud bucket group, and the vane inclined plate group is placed above the choke mud bucket group; the lower edges on both sides of the vane inclined plate chamber shell are connected to the edges on both sides of the choke mud bucket group, and the upper inner side of the vane inclined plate chamber shell is close to the upper end of the vane inclined plate group.

[0017] Furthermore, the lateral flow wing inclined plate has the side where the water inlet grid plate group is located as the front, the upper wings of the lateral flow wing inclined plate are perpendicular to the inclined plate and are installed at equal intervals, the wing length is consistent with the inclined plate width, and the wing height gradually increases from front to back.

[0018] Furthermore, the first choke mud hopper, the second choke mud hopper and the third choke mud hopper have the same shape and opening; the length of the mud hopper opening of the first choke mud hopper, the second choke mud hopper and the third choke mud hopper is consistent with the length of the lower base of the trapezoidal cross-section of the blade inclined plate chamber shell; the horizontal inclination angles of the four mud hopper walls of the first choke mud hopper, the second choke mud hopper and the third choke mud hopper are consistent, which is 45-60°.

[0019] The inlet grating group side is designated as the front of the intake head, the water collection chamber side is designated as the rear of the intake head, several first-stage flow-blocking hoppers form the front of the flow-blocking hopper group, several second-stage flow-blocking hoppers form the middle of the flow-blocking hopper group, and several third-stage flow-blocking hoppers form the rear of the flow-blocking hopper group. This design aims to prevent short-circuiting, where large amounts of water enter the hopper discharge port and pass through only a few inclined plates or directly into the water collection chamber without passing through any inclined plates, thereby reducing sand removal efficiency. Therefore, treatment measures (such as upstream inclined plates) or combined treatment and flow-blocking measures (such as flow-blocking inclined plates) are installed within the hopper to increase the head loss of water entering the hopper, reduce short-circuiting, and ensure treatment effectiveness. Short-flow far away from the water collection chamber will be treated by most of the inclined plates, which has little impact on water quality, that is, the front part of the flow-blocking mud bucket group where the first flow-blocking mud bucket is located, and the mud bucket at this position is embedded with anti-short-flow plates that have neither treatment nor flow-blocking effects; the short-flow in the mud bucket in the middle, that is, the second flow-blocking mud bucket, has a moderate impact on the sand removal effect, so only upstream inclined plates with treatment effect are embedded in the mud bucket, and the short-flow in the mud bucket close to the water collection chamber, that is, the rear part of the flow-blocking mud bucket group where the third flow-blocking mud bucket is located, has a serious impact on the sand removal effect of the water intake head because it has hardly been treated by the inclined plates, so the mud bucket is embedded with flow-blocking inclined plates that have both treatment and flow-blocking effects.

[0020] The first choke mud hopper, the second choke mud hopper and the third choke mud hopper have different arrangement positions, the side of the designated water inlet grid plate group is the front of the water intake head, and the side of the water collection chamber is the rear of the water intake head. The mud hopper openings of several first choke mud hoppers are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the front part of the choke mud hopper group, the mud hopper openings of several second choke mud hoppers are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the middle part of the choke mud hopper group, and the mud hopper openings of several third choke mud hoppers are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the rear part of the choke mud hopper group.

[0021] Furthermore, the short-flow prevention plate is a trapezoidal thin plate, and the water flow direction of the designated water intake head is from the water inlet grid plate group to the water collection chamber. The upper and lower bottoms of the anti-short-flow plate trapezoid are perpendicular to the water flow direction, and the anti-short-flow plate is connected to the inner sides of the two side surfaces of the mud bucket of the first flow-blocking mud bucket through the two sides of the anti-short-flow plate trapezoid. After the anti-short-flow plate is installed, the lower end height is higher than the upper edge of the mud discharge port; the long side of the bottom side of the upstream inclined plate trapezoid is arranged perpendicular to the water flow direction, and the two sides of the upstream inclined plate are connected to the inner sides of the two side surfaces of the second flow-blocking mud bucket, the designated water inlet grid plate group side is front, the upstream inclined plate is tilted backward, the inclination angle is consistent with the inclination angle of the four walls of the mud bucket, and the inclined plate spacing is equal.

[0022] The baffle plate is an upstream baffle plate with a rack on the bottom, the racks are parallel to the upper and lower bottom edges of the trapezoidal bottom of the baffle plate, and are arranged at equal intervals. The tooth surface is inclined relative to the bottom of the baffle plate in the direction of the shorter bottom edge of the trapezoid, and is horizontally inclined 30-90° with the bottom of the baffle plate as the horizontal plane; the bottoms of the first baffle hopper, the second baffle hopper and the third baffle hopper are all provided with mud discharge ports; the side of the designated mud hopper close to the water inlet grid plate group is the mud hopper water-facing surface, and the side away from the water inlet grid plate group is the mud hopper backwater surface; the mud discharge port is located at the bottom of the mud hopper backwater surface, the bottom edge of the opening is close to the inner side of the mud hopper water-facing surface and is 0.7-2 cm upward along the backwater surface. The two sides of the opening are close to the inner sides of the two side surfaces of the mud hopper.

[0023] Furthermore, the bottom surface shape of the flow stabilizer is consistent with the trapezoidal cross-section of the blade ramp chamber shell, with a thickness of 1-4 cm, and there is a through hole perpendicular to the bottom surface on the flow stabilizer, the shape of the through hole is not limited, and the plate porosity is higher than 70%; the flow stabilizer is placed in the blade ramp chamber shell perpendicular to the axis of the blade ramp chamber shell, 20-200 mm behind the blade ramp group, and the upper part and both sides are closely fitted with the inner side of the water collecting chamber shell, and the height is consistent with the blade ramp chamber shell; the water collecting chamber shell is connected to the blade ramp chamber shell in front; the upper part and both sides of the water collecting chamber shell are consistent with the structure of the blade ramp chamber shell; the rear part of the water collecting chamber shell is a trapezoidal slope, with the shorter bottom side of the trapezoid as the axis, tilted forward, and the horizontal inclination angle is greater than 40°; the rear slope of the water collecting chamber shell is provided with a connector; the lower edge of the water collecting chamber shell is sealed and connected to the rear edge of the flow-blocking mud bucket group.

[0024] A float port is provided in the middle of the top surface of the water collection chamber shell, and the edge of the float port is raised to an extra height around the float port, which is 5-10mm higher than the thickness of the limit float; the upper end of the hose is connected to the connector, and the lower end is connected to the connector.

[0025] Furthermore, the floats on both sides are tightly attached to both sides of the vane inclined plate chamber shell, and their height is consistent with the vane inclined plate chamber shell; the surface where the flow-blocking mud bucket group is located is designated as the bottom, and the surface where the limit float is located is designated as the top. The volume of the floats on both sides gradually increases from bottom to top, and there is a buoyancy boundary at a height of 1 / 3-3 / 4. With the buoyancy boundary as the boundary, the volume increase of the upper part is greater than that of the lower part.

[0026] The limit float is cylindrical, with a bottom shaped like the combined shape of the upper portions of the two floats and the upper portion of the vane and swash plate housing. Its height is determined by the volume of the water intake head, ranging from 5 to 150 mm, and its bottom is positioned above the vane and swash plate housing. The float housing allows the water intake head to float on the river surface, further reducing the sediment content of the incoming water. The float housing consists of two side floats and a stopper float. During the initial sedimentation process, the intake head increases in weight due to sediment deposition on the inclined plates and accumulation in the hopper. Once sediment begins to drain from the hopper, the head's weight stops increasing. The amount of weight gain depends on the sediment content in the river. To accommodate changes in sediment content, the floats are designed to increase in volume from bottom to top. This allows the intake head to dynamically adjust its draft during operation, thereby adjusting the cross-sectional area and flow rate within the intake head, and ultimately, the treatment effect, to accommodate changes in sediment content. For example, as sediment concentration increases, the intake head increases in weight, its draft deepens, its cross-sectional area increases, its flow rate decreases, and its sedimentation effect improves. The stopper float ensures that the intake head remains afloat even during overload operation, when the sediment content exceeds the maximum treatment capacity.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The water inlet grating of the present invention is composed of a grille module at the rear of the guide module. When flowing through the guide module, the water needs to rotate 180 degrees to pass through the grille module and enter the water intake head. Large floating objects in the water flow along with 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 to form a vortex in front of the water inlet of the two gratings when flowing through the water inlet guide grid group, preventing small floating objects from entering the water intake head. The grille module also plays a role in preventing a small number of floating objects that pass through the vortex from entering the water intake head. The curvature of the connection between the two barrel openings on one side of the guide module located on the bottom surface is greater than that on the two sides and the upper side. The mud and sand deposited in the water inlet guide grid group naturally slide down from the curved surface. The above measures can effectively prevent the water inlet from being blocked.

[0029] 2. After water flows through the inlet guide grid assembly and 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 short-flow baffles in the first-stage flow-blocking bucket function to prevent water that has passed the bottom of the inclined plates from bypassing the inclined plate array by flowing through the first-stage flow-blocking bucket, thereby reducing treatment efficiency. The upward flow inclined plates and toothed reverse inclined plates in the second-stage and third-stage flow-blocking buckets also perform this function.

[0030] 3. A large amount of sediment in the water settles and slides into the baffle unit to be discharged. After the water flows through the straight holes on the rectifier transition plate, the vortex is eliminated and the flow becomes smooth, which is conducive to sedimentation. The subsequent water collection component only takes the upper layer of water, which further reduces the sediment content in the water outlet.

[0031] 4. Use grid water inlet to expand the water inlet area. Multiple water inlet guide grids are combined to increase the water inlet area to reduce the head loss of the water flow entering from the water inlet and reaching the clean water compartment through the inclined plate, thereby increasing the amount of water treated. The design of the flow-blocking mud bucket group, reducing the area of ​​the mud bucket sand discharge control port, and designing the sand discharge control port on the back water side also increase the head loss of the short-flow water flow and reduce the short-flow water volume.

[0032] 5. The float housing allows the intake head to float on the river surface, further reducing the sediment content of the incoming water. The float housing consists of two side floats and a limit float. During the initial sediment settling process, the weight of the intake head increases due to sediment deposition on the inclined plate and accumulation in the mud bucket. After the sediment begins to be discharged from the mud bucket, the weight of the intake head stops increasing. The increase in weight of the intake head depends on the sediment content of the river water. Therefore, in order to cope with the changes in sediment content in the river, the floats on both sides are designed to gradually increase in volume from bottom to top, allowing the intake head to autonomously and dynamically adjust the draft depth during operation, thereby adjusting the cross-sectional area of ​​the water flow in the intake head, adjusting the water flow velocity in the water head, and thus adjusting the treatment effect to cope with the changes in sediment content.

[0033] 6. The overall height of the water intake head is relatively low, and it can stably draw water in shallow water where most water intake heads cannot operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a schematic diagram of the overall structure of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0035] Figure 2 This is a schematic diagram of the side cross-sectional structure of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0036] Figure 3 This is an overall exploded view of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0037] Figure 4 This is a schematic diagram of the overall structure of a water inlet grid assembly of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0038] Figure 5 This is a schematic diagram and exploded view of the structure of a single water inlet grid plate of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0039] Figure 6 This is a rear view of the vane and inclined plate assembly of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0040] Figure 7 This is a schematic diagram of the structure of a single wing inclined plate of a shallow water pre-sedimentation water intake head proposed by the present invention from front to back;

[0041] Figure 8 This is a schematic diagram of the structure of the first flow-blocking mud bucket, the second flow-blocking mud bucket and the inlays therein: the short-flow prevention plate and the upstream inclined plate of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0042] Figure 9 This is a schematic diagram of the structure of the third flow-blocking mud bucket and its inlay in the shallow water pre-sedimentation water intake head proposed by the present invention: the flow-blocking inclined plate;

[0043] Figure 10 This is an overall exploded view of the float housing of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0044] Figure 11 This is an overall exploded view of the water collection chamber of a shallow water pre-sedimentation water intake head proposed by the present invention;

[0045] Description of Reference Numerals

[0046] Inlet grating assembly (1); vane inclined plate chamber (2); float housing (3); water collecting chamber (4); baffle plate (12); inlet grating (11); guide plate (111); grille (112); flow blocking mud bucket assembly (22); vane inclined plate chamber housing (24); vane inclined plate assembly (23); lateral flow vane inclined plate (231); lateral flow inclined plate (232); first flow blocking mud bucket (221); second flow blocking mud bucket (222); third flow blocking mud bucket (223); short-flow prevention plate (2 211); upstream inclined plate (2221); flow-blocking inclined plate (2231); flow stabilizing plate (41); water collecting chamber shell (42); water collecting assembly (43); float (431); hose (432); connector (433); mud outlet (224); mud bucket water-facing surface (225); mud bucket backwater surface (226); mud bucket two side surfaces (227); buoyancy boundary (311); two side floats (31); limit float (32); float outlet (421); connector (422). DETAILED DESCRIPTION

[0047] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be a communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. In addition, in the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside" and the like to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0048] In a relatively shallow surface water example, see Figure 1 As shown, a shallow water dynamic sand removal and water intake head of the present invention includes an inlet grating group 1, a vane inclined plate chamber 2, a float shell 3 and a water collection chamber 4. The inlet grating group 1 is connected to the vane inclined plate chamber 2, and the upper shell of the vane inclined plate chamber 2 covers the float shell 3. The vane inclined plate chamber 2 has the inlet grating group 1 as the front end and the rear end is connected to the water collection chamber 4. The inlet grating group 1, the vane inclined plate chamber 2 and the water collection chamber 4 are connected to form an internal channel with water supply flow passing through the inlet grating group 1, the vane inclined plate chamber 2 and the water collection chamber 4 in sequence. The water intake head is placed in the water flow with the inlet grating group as the head and the water collection chamber as the tail, with the head facing the water and the tail facing the water. After the water flows into the vane inclined plate chamber from the inlet grating group, it flows into the water collection chamber and is collected.

[0049] like Figure 1 The water inlet grating plate group 1 is composed of a baffle plate 12 and a plurality of water inlet grating plates 11. Figure 5 The water inlet grid 11 is composed of a guide plate 111 with a grille 112 embedded at the rear; the vane inclined plate chamber 2 is composed of a flow-blocking mud bucket group 22, a vane inclined plate chamber shell 24 and a vane inclined plate group 23.

[0050] The wing inclined plate group 23 is composed of a plurality of lateral flow wing inclined plates 231 and a plurality of lateral flow inclined plates 232. The lateral flow wing inclined plates 231 and the lateral flow inclined plates 232 are inclined toward the central axis of the water intake head, and the horizontal inclination angle of the inclined plates is 45°-60°; there is a spacing of 15-80mm between each lateral flow wing inclined plates 231, and a spacing of 5-40mm between each lateral flow inclined plates 232. There is a spacing of 15-80mm between the lateral flow wing inclined plates 231 on the outside and the wing inclined plate chamber shell 24.

[0051] The spoiler group 22 consists of a plurality of first spoiler hoppers 221, a second spoiler hopper 222 and a third spoiler hopper 223; a plurality of short-flow prevention plates 2211 are embedded in the first spoiler hopper 221; a plurality of upstream inclined plates 2221 are embedded in the second spoiler hopper 222; and a plurality of spoiler inclined plates 2231 are embedded in the third spoiler hopper 223.

[0052] The float housing 3 is composed of floats 31 on both sides and a limit float 32; the water collecting chamber 4 is composed of a flow stabilizing plate 41, a water collecting chamber housing 42 and a water collecting assembly 43; Figure 5 As shown, the guide plate 111 in the water inlet grid plate 11 is cylindrical, without upper and lower bottom surfaces, and the two tube openings are of different sizes, the small opening side is the front, and the large opening side is the back, and water flows in from the large opening side. Figure 4 The water inlet grating 11 is connected front to back. After such a combination, the water flow needs to rotate 180 degrees when flowing through the guide plate 111 and enter the water intake head through the large opening side. Large floating objects in the water will flow away with the water flow due to their large mass and cannot enter the water intake head; the curvature of the water-facing surface of each guide plate 111 and the front-to-back connected structure cause the water flow to form a vortex in front of the water inlet of the two gratings when flowing through the water inlet grating group, thereby preventing small floating objects from entering the water intake head.

[0053] When the guide plate 111 is placed vertically, the horizontal plane where the upper side of the rear large opening side tube opening is located is higher than the horizontal plane where the upper side of the front small opening side tube opening is located, and the horizontal plane where the bottom side of the rear large opening side tube opening is located is lower than the horizontal plane where the bottom side of the front small opening side tube opening is located, and the distance A where the horizontal plane where the upper side of the rear large opening side tube opening is located is higher than the horizontal plane where the upper side of the front small opening side tube opening is located, and A is greater than B, so that the sediment deposited in the water inlet grid plate group can naturally slide down the curved surface.

[0054] The inlaid grille 112 is placed perpendicular to the cylinder axis and inside the cylindrical guide plate 111. The edge of the inlaid grille 112 is in contact with the cylinder wall of the guide plate 111. The inlaid grille 112 also serves to block a small number of floating objects that pass through the vortex formed in front of the water inlet and enter the water intake head. The above measures effectively reduce the possibility of the water inlet of the water intake head being blocked.

[0055] like Figure 3 The bottom of the vane inclined plate chamber 2 is the choke mud bucket group 22, and the vane inclined plate group 23 is placed above the choke mud bucket group 22; the lower edges on both sides of the vane inclined plate chamber shell 24 are connected to the edges on both sides of the choke mud bucket group 22, and the upper inner side of the vane inclined plate chamber shell 24 is close to the upper end of the vane inclined plate group 23.

[0056] like Figure 7The lateral flow vane ramps 231 are positioned with the side of the inlet grating assembly 1 as the front. The vanes on the lateral flow vane ramps 231 are perpendicular to the ramps and equidistantly installed. The vane length is consistent with the vane width, and the vane height gradually increases from front to back. Within a certain range, the vane height determines the treatment effect of the vane ramps. The water entering the vane ramp chamber 2 from the inlet grating assembly 1 is untreated and has the highest sediment content, which severely increases the mud discharge pressure in the front area of ​​the flow-blocking hopper assembly 22, easily causing mud discharge port blockage. Sediment settles completely early on, reducing the utilization rate of the rear hoppers and hoppers. To avoid this, the volume of the hoppers in the front area can be increased, while the number of vanes and the volume of the hoppers in the rear area can be reduced. However, the increased hopper volume inevitably increases the overall height of the water intake head, making it unsuitable for use in shallow water. To address these issues while also meeting shallow-water requirements, the wing height is designed to gradually increase from front to back, reducing the efficiency of the front-zone wing ramps, thereby reducing sediment settling, while increasing the efficiency of the rear-zone wing ramps and improving the utilization of the rear-zone ramps and hopper. This design also evens out the mass distribution of the intake head, increasing its floating stability in the water.

[0057] like Figure 8 、 9 As shown: the first blocking mud hopper 221, the second blocking mud hopper 222 and the third blocking mud hopper 223 have the same shape and opening, but different internal inlays. Different internal inlays determine the functions of the corresponding mud hoppers in addition to mud discharge and mud storage; the anti-short flow plate 2211 is a trapezoidal thin plate, and the water flow direction of the designated water intake head is from the water inlet grid plate group 1 to the water collecting chamber 4. The upper and lower bottoms of the anti-short flow plate 2211 trapezoid are perpendicular to the water flow direction. The anti-short flow plate 2211 is connected to the inner sides of the mud hopper sides 227 of the first blocking mud hopper 221 through the two sides of the trapezoid of the anti-short flow plate 2211. After the anti-short flow plate 2211 is installed, the lower end height is higher than the upper edge of the mud discharge port 224. The design of the anti-short flow plate 2211 avoids the water flow passing through the bottom of the inclined plate from flowing through the first blocking mud hopper 221 to bypass the vane inclined plate group 23 and reduce the treatment effect. The upstream inclined plates 2221 and the inclined plates 2231 in the second and third choke hoppers 222 and 223 also have this function.

[0058] like Figure 8 The long side of the trapezoidal bottom side of the upstream inclined plate 2221 is arranged perpendicular to the water flow direction. The two sides of the upstream inclined plate 2221 are connected to the inner sides of the two side surfaces 227 of the second flow-blocking mud bucket 222. The side of the designated water inlet grid plate group 1 is the front, and the upstream inclined plate 2221 is inclined backward. The inclination angle is consistent with the inclination angle of the four walls of the mud bucket, and the inclined plates are spaced equally.

[0059] like Figure 9The spoiler inclined plate 2231 is an upstream inclined plate 2221 with teeth on the bottom surface. The racks are parallel to the upper and lower bottom edges of the trapezoidal bottom surface of the spoiler inclined plate 2231, and are arranged at equal intervals above and below. The tooth surface is inclined relative to the bottom surface of the spoiler inclined plate 2231 toward the shorter bottom edge of the trapezoid, and is horizontally inclined at 30-90° with the bottom surface of the spoiler inclined plate 2231 as the horizontal plane.

[0060] like Figure 2 The first choke mud hopper 221, the second choke mud hopper 222 and the third choke mud hopper 223 have different arrangement positions, the side of the designated water inlet grid plate group 1 is the front of the water intake head, and the side of the water collecting chamber 4 is the rear of the water intake head. The mud hopper openings of several first choke mud hoppers 221 are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the front part of the choke mud hopper group 22, the mud hopper openings of several second choke mud hoppers 222 are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the middle part of the choke mud hopper group 22, and the mud hopper openings of several third choke mud hoppers 223 are facing upward, the long sides of the mud hopper openings are connected and arranged side by side to form the rear part of the choke mud hopper group 22.

[0061] The design of the upstream inclined plate 2221 and the flow-blocking inclined plate 2231 is intended to prevent the generation of a large amount of water flowing into the mud hopper from the mud outlet and directly entering the water collection chamber 4 through only a few inclined plates or without passing through any inclined plates, resulting in a decrease in the sand removal effect. Therefore, treatment measures such as upstream inclined plates or flow-blocking inclined plate measures that have both treatment and flow-blocking functions are set in the mud hopper to increase the head loss of water entering the mud hopper, reduce the short-circuit water volume, and ensure the treatment effect. The short-flow away from the water collection chamber 4 will be processed by most of the inclined plates, which has little impact on the water quality, that is, the front part of the flow-blocking mud bucket group where the first flow-blocking mud bucket 221 is located, so the mud bucket at this position is embedded with an anti-short-flow plate 2211 which has neither treatment function nor flow-blocking function; the mud bucket in the middle, that is, the second flow-blocking mud bucket 222, has a moderate impact on the sand removal effect when short-flow occurs, so only the upstream inclined plate 2221 with treatment effect is embedded in the mud bucket, and the mud bucket close to the water collection chamber side, that is, the rear part of the flow-blocking mud bucket group where the third flow-blocking mud bucket 223 is located, has a serious impact on the sand removal effect of the water intake head because the short-flow occurs almost without being processed by the inclined plates, so the flow-blocking inclined plate 2231 with both treatment effect and flow-blocking function is embedded in the mud bucket.

[0062] The bottoms of the first choke mud hopper 221, the second choke mud hopper 222 and the third choke mud hopper 223 are all provided with Figure 8 The mud discharge port 224 is shown; the side of the designated mud bucket close to the water inlet grid plate group 1 is the water-facing surface 225, and the side away from the water inlet grid plate group 1 is the back water surface 226. The mud discharge port 224 is located at the bottom of the mud bucket back water surface 226, and the bottom edge of the opening is close to the inner side of the mud bucket water-facing surface 225 and is a trapezoidal strip opening 0.7-2 cm upward along the back water surface 226. The two sides of the opening are close to the inner sides of the two side surfaces 227 of the mud bucket.

[0063] Designing the mud outlet on the backside of the water means that the water entering the mud hopper outlet must bypass the bottom of the mud hopper and turn 180 degrees before entering. This increases the head loss of this short-circuit flow and reduces the short-circuit water volume. The mud outlet area is minimized without affecting mud discharge, which also increases the short-circuit head loss and reduces the short-circuit water volume.

[0064] The opening lengths of the first choke hopper 221, the second choke hopper 222 and the third choke hopper 223 are consistent with the length of the lower base of the trapezoidal cross-section of the vane inclined plate chamber shell 24; the horizontal inclination angles of the four hopper walls of the first choke hopper 221, the second choke hopper 222 and the third choke hopper 223 are consistent, which is 45-60°.

[0065] like Figure 1 、 2 As shown, the bottom surface of the flow stabilizer 41 conforms to the trapezoidal cross-section of the vane and swash plate housing 24, is 1-4 cm thick, and has a through-hole perpendicular to the bottom surface. The through-hole shape is not limited, and the plate porosity is greater than 70%. The flow stabilizer 41 is positioned perpendicular to the axis of the vane and swash plate housing 24, 20-200 mm behind the vane and swash plate assembly 23. Its top and sides closely align with the inside of the water collection chamber housing 42, and its height is the same as that of the vane and swash plate housing 24. The numerous vortices generated by water flowing through the vane and swash plate assembly are detrimental to sedimentation. However, after flowing through the straight holes in the flow stabilizer, these vortices are eliminated, the flow becomes smoother, and sediment settles more easily in the water collection chamber.

[0066] like Figure 1 、 2 As shown, the water collecting chamber shell 42 is connected to the vane inclined plate chamber shell 24 in front; the upper part and both sides of the water collecting chamber shell 42 are consistent with the structure of the vane inclined plate chamber shell 24; the rear part of the water collecting chamber shell 42 is a trapezoidal inclined surface, which is inclined forward with the shorter bottom side of the trapezoidal upper bottom side as the axis, and the horizontal inclination angle is greater than 40°; a connecting head 422 is provided on the rear inclined surface of the water collecting chamber shell 42; the lower edge of the water collecting chamber shell 42 is sealed and connected to the rear edge of the flow-blocking mud bucket group 22.

[0067] like Figure 11 As shown, a float port 421 is provided in the middle of the top surface of the water collection chamber shell 42 to ensure that when the water intake head is deep 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 port 421, so that the lower hose can stably obtain clean water from the upper layer.

[0068] like Figure 11 As shown, the edge of the float port 421 rises a circle around the float port 421, which is 5-10mm higher than the thickness of the limit float 32 to prevent rainwater or river water from entering the water collection chamber through the float port 421 when the water intake head is deep.

[0069] like Figure 11As shown, the upper end of the hose 432 is connected to the connector 433 , and the lower end is connected to the connector 422 , and the connector 422 can be connected to a water pipe.

[0070] like Figure 10 The floats 31 on either side of the vane swash plate housing 24 are positioned at the same height as the housing. The surface where the flow-blocking hopper assembly 22 is located is designated as the bottom, while the surface where the stop float 32 is located is designated as the top. The volume of the floats 31 increases gradually from bottom to top, and a buoyancy threshold 311 is defined between 1 / 3 and 3 / 4 of the height. The volume increase of the upper portion of the floats 311 is greater than that of the lower portion. The purpose of buoyancy threshold 311 is to minimize the volume increase of the float below buoyancy threshold 311, resulting in minimal buoyancy variation. This design ensures that even when the sediment content is very low, the water intake head maintains a certain draft due to its own weight, allowing the water level to submerge above buoyancy threshold 311. This prevents insufficient water intake or excessive bubbles in the water pipe due to shallow draft. Above buoyancy threshold 311, however, the volume increase significantly increases, depending on the varying sediment content at the location of use.

[0071] like Figure 10 The limit float 32 is a column, and the bottom shape is the shape of the combination of the upper part of the floats 31 on both sides and the upper part of the vane inclined plate chamber shell 24. The height is determined according to the volume of the water intake head, and is 5-150mm. The bottom is placed above the vane inclined plate chamber shell 24.

[0072] The float housing 3 allows the intake head to float on the river surface, further reducing the sediment content of the incoming water. The float housing 3 consists of two side floats 31 and a limit float 32. During the initial sediment settling process, the intake head increases in weight due to sediment deposition on the inclined plate and accumulation in the hopper. Once sediment begins to drain from the hopper and the discharge balances the incoming sediment, the head's weight no longer increases. Therefore, the weight gain of the intake head depends on the sediment content of the river water. To address changes in the river's sediment content, the floats on both sides are designed to gradually increase in volume from bottom to top, allowing the intake head to autonomously and dynamically adjust its draft during operation. This, in turn, adjusts the cross-sectional area and flow velocity within the intake head, ultimately adjusting the treatment effect to accommodate changes in sediment content. For example, as the river's sediment content increases, the intake head weight increases, its draft deepens, its cross-sectional area increases, its flow velocity decreases, and its sedimentation effect improves. The limit float ensures that the water intake head can float on the water surface when the sediment content exceeds the maximum processing capacity during overload operation.

[0073] In the water collection chamber 4, the sediment content increases with the water depth. Since the water intake head is floating, the liquid level of the water collection chamber 4 changes with the rise and fall of the water intake head. In order to obtain the upper water, a water collection component 43 is set. Figure 11The water collection assembly 43 consists of a float 431, a hose 432, and a connector 433. Regardless of how the liquid level in the water collection chamber 4 changes, the float 431 always floats above the liquid level, allowing the hose 432 connected to the float 431 to continuously draw clean water from the upper layer. The lower end of the hose 432 is connected to a connector 422, which is then connected to a water pipe to deliver the collected clean water to the pump station.

[0074] Example 1

[0075] In the Qinba Mountain area surface water example, the highest daily water consumption in the area is 40,000 L / day;

[0076] The sediment content of the influent is 3150 mg / L;

[0077] The number of water inlet grid plates 11 is 4;

[0078] The number of the lateral flow wing inclined plates 231 is 8;

[0079] The number of the lateral flow inclined plates 232 is 2;

[0080] The lateral flow wing inclined plate 231 has a horizontal inclination angle of 60°;

[0081] The lateral flow inclined plate 232 has a horizontal inclination angle of 60°;

[0082] The lateral spacing between the lateral flow wing inclined plates 231 is 80 mm, and the lateral spacing between the lateral flow inclined plates 232 is 20 mm;

[0083] The lateral distance between the lateral flow wing ramp 231 on the outside and the wing ramp chamber housing 24 is 80 mm;

[0084] The curvature of the water-facing surface of the guide plate 111 is r=30mm, and the curvature of the bottom surface of the guide plate 111 is r=48mm;

[0085] The lateral flow wing inclined plate 231 wing height varies in the range of 20-52 mm;

[0086] The spacing between the upstream inclined plates 2221 is equal and is 15 mm;

[0087] The racks of the spoiler 2231 are parallel to the upper and lower bases of the trapezoidal bottom surface of the spoiler 2231 and are arranged at equal intervals. The tooth spacing is 6 mm. They are arranged from top to bottom, with the starting rack 5 mm away from the edge of the spoiler. The tooth surface is inclined at 45° relative to the shorter base of the upper bottom of the trapezoidal bottom surface of the spoiler 2231.

[0088] The opening of each mud hopper is a rectangle with a length of 750mm and a width of 125mm;

[0089] The number of the first flow-blocking mud buckets 221 is: 5;

[0090] The number of the second flow-blocking mud buckets 222 is: 8;

[0091] The number of the third flow-blocking mud buckets 223 is 5;

[0092] The total length of the flow-blocking mud bucket group 22 is 13572 mm;

[0093] The bottom edge of the mud discharge port 224 is close to the inner side of the mud bucket water-facing surface 225 and is a trapezoidal strip opening 1.2 cm upward along the water-receiving surface 226;

[0094] The horizontal inclination angle of the four walls of each mud bucket is consistent, which is 45°;

[0095] The upper base of the flow stabilizer 41 is 480mm long, the lower base is 746mm long, and the height is 230mm. The thickness of the flow stabilizer 41 is 15mm, and the holes in the flow stabilizer 41 are square with a side length of 18mm.

[0096] The float opening 421 has an extra-high height that is 5 mm higher than the thickness of the limit float 32 , and is a square with a side length of 170 mm.

[0097] The buoyancy limit 311 is at 1 / 2 of the height of the floats 31 on both sides;

[0098] The height of the floats 31 on both sides is 234 mm;

[0099] The height of the limit float 32 is 25 mm;

[0100] The diameter of the float 431 is d=55mm;

[0101] The diameter of the hose 432 is 40 mm;

[0102] The flow velocity in the hose is 0.28 m / s, 1000i=2.61;

[0103] As the wing height gradually increases, the maximum horizontal flow velocity of the lateral flow wing inclined plate section is 12.51 mm / s;

[0104] In the early stage of treatment, the water head draft depth was 140mm, and the sand content in the water with a particle size greater than 0.1mm was reduced by an average of 58.46%.

[0105] After 4 hours of operation, the draft depth of the water intake head was 184mm, and the average removal rate of sand particles with a particle size greater than 0.1mm in the water increased to 72.01%.

[0106] Example 2

[0107] In a relatively shallow surface water example, the highest daily water consumption in the area is 46,000 L / day;

[0108] The sediment content of the influent is 1930 mg / L;

[0109] The number of water inlet grid plates 11 is 7;

[0110] The number of the lateral flow wing inclined plates 231 is 8;

[0111] The number of the lateral flow inclined plates 232 is 3;

[0112] The lateral flow wing inclined plate 231 has a horizontal inclination angle of 60°;

[0113] The lateral flow inclined plate 232 has a horizontal inclination angle of 60°;

[0114] The lateral spacing between the lateral flow wing inclined plates 231 is 82 mm, and the lateral spacing between the lateral flow inclined plates 232 is 15 mm;

[0115] The lateral distance between the outer side flow wing ramp 231 and the wing ramp chamber housing 24 is 82 mm;

[0116] The curvature of the water-facing surface of the guide plate 111 is r=30mm, and the curvature of the bottom surface of the guide plate 111 is r=48mm;

[0117] The lateral flow wing inclined plate 231 wing height varies in the range of 20-52 mm;

[0118] The spacing between the upstream inclined plates 2221 is equal and is 18 mm;

[0119] The racks of the spoiler 2231 are parallel to the upper and lower bases of the trapezoidal bottom surface of the spoiler 2231 and are arranged at equal intervals. The tooth spacing is 6 mm. They are arranged from top to bottom, with the starting rack 5 mm away from the edge of the spoiler. The tooth surface is inclined at 45° relative to the shorter base of the upper bottom of the trapezoidal bottom surface of the spoiler 2231.

[0120] The opening of each mud hopper is a rectangle with a length of 758mm and a width of 125mm.

[0121] The number of the first flow-blocking mud buckets 221 is 7;

[0122] The number of the second flow-blocking mud buckets 222 is: 6;

[0123] The number of the third flow-blocking mud buckets 223 is 5;

[0124] The total length of the flow-blocking mud bucket group 22 is 13572 mm;

[0125] The bottom edge of the mud discharge port 224 is close to the inner side of the mud bucket water-facing surface 225 and is a trapezoidal strip opening 1.0 cm upward along the water-receiving surface 226;

[0126] The horizontal inclination angle of the four walls of each mud bucket is consistent, which is 45°;

[0127] The upper base of the flow stabilizer 41 is 488mm long, the lower base is 754mm long, and the height is 230mm. The thickness of the flow stabilizer 41 is 25mm, and the hole of the flow stabilizer 41 is a square with a side length of 18mm.

[0128] The float opening 421 is 5 mm higher than the thickness of the limit float 32 and is a square with a side length of 170 mm.

[0129] The buoyancy limit 311 is at 1 / 2 of the height of the floats 31 on both sides;

[0130] The height of the floats 31 on both sides is 234 mm;

[0131] The height of the limit float 32 is 20 mm;

[0132] The diameter of the float 431 is d=40 mm;

[0133] The diameter of the hose 432 is 40 mm;

[0134] The flow velocity in the hose is 0.30 m / s, 1000i=3.09;

[0135] As the wing height gradually increases, the maximum horizontal flow velocity of the lateral flow wing inclined plate section is 12.94 mm / s;

[0136] In the initial treatment phase, the water intake depth was 138mm, and the average sand content of particles larger than 0.1mm in the water was reduced by 60.64%. After four hours of operation, the water intake depth was 167mm, and the average removal rate of sand particles larger than 0.1mm in the water increased to 75.12%.

[0137] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A shallow water dynamic sand removal and water intake head, comprising a water inlet grid plate group (1), a vane inclined plate chamber (2), a float housing (3) and a water collection chamber (4); characterized in that: The water inlet grating plate group (1) is connected to the vane inclined plate chamber (2), the upper shell of the vane inclined plate chamber (2) covers the float shell (3), the vane inclined plate chamber (2) has the water inlet grating plate group (1) as the front end, and the rear end is connected to the water collection chamber (4); The water inlet grating plate group (1) is composed of a baffle plate (12) and a plurality of water inlet grating plates (11), wherein the water inlet grating plates (11) are composed of a guide plate (111) and a grille (112) embedded in the rear portion thereof; The vane inclined plate chamber (2) is composed of a flow-blocking mud bucket group (22), a vane inclined plate group (23) and a vane inclined plate chamber housing (24); The wing inclined plate group (23) is composed of a plurality of lateral flow wing inclined plates (231) and a plurality of lateral flow inclined plates (232); The flow-blocking mud bucket group (22) is composed of a plurality of first flow-blocking mud buckets (221), a second flow-blocking mud bucket (222), and a third flow-blocking mud bucket (223); A plurality of short-flow prevention plates (2211) are embedded in the first flow-blocking mud hopper (221); a plurality of upstream inclined plates (2221) are embedded in the second flow-blocking mud hopper (222); and a plurality of flow-blocking inclined plates (2231) are embedded in the third flow-blocking mud hopper (223). The guide plate (111) in the water inlet grating (11) is cylindrical, without upper and lower bottom surfaces, and the two tube openings are of different sizes, the small opening side is the front, and the large opening side is the rear. The water inlet grating (11) is assembled in a front-to-back manner; when the guide plate (111) is placed vertically, the horizontal plane where the upper side of the tube opening on the rear large opening side is higher than the horizontal plane where the upper side of the tube opening on the front small opening side is located, and the horizontal plane where the bottom side of the tube opening on the rear large opening side is lower than the bottom side of the tube opening on the front small opening side is located. The horizontal plane where the bottom edge of the rear large opening side tube opening is located is lower than the horizontal plane where the bottom edge of the front small opening side tube opening is located by a distance A, and the horizontal plane where the upper side edge of the rear large opening side tube opening is higher than the horizontal plane where the upper side edge of the front small opening side tube opening is located by a distance B, A is greater than B, the inlaid grille (112) is placed in the tube of the cylindrical guide plate (111) perpendicular to the axis of the cylinder, and the edge of the inlaid grille (112) is in contact with the tube wall of the guide plate (111); The float housing (3) is composed of floats (31) on both sides and a limit float (32); the water collection chamber (4) is composed of a flow stabilizing plate (41), a water collection chamber housing (42), and a water collection assembly (43); the water collection assembly (43) is composed of a float (431), a hose (432), and a connector (433); The two side floats (31) are closely attached to the two sides of the vane inclined plate chamber housing (24), and their height is consistent with that of the vane inclined plate chamber housing (24); The surface where the flow-blocking mud bucket group (22) is located is designated as the bottom, and the surface where the limit float is located is designated as the top. The volumes of the floats (31) on both sides gradually increase from the bottom to the top. A buoyancy boundary (311) exists at a height of 1 / 3-3 / 4. With the buoyancy boundary (311) as the boundary, the volume increase of the upper part is greater than that of the lower part. The limit float (32) is a column, and the bottom surface is in the shape of a combination of the upper portion of the floats (31) on both sides and the upper portion of the vane inclined plate chamber housing (24), and the bottom surface is placed above the vane inclined plate chamber housing (24).

2. The shallow water dynamic sand removal and water intake head according to claim 1 is characterized in that: The lateral flow wing inclined plates (231) and the lateral flow inclined plates (232) are inclined inwardly toward the central axis of the water intake head, and the horizontal inclination angles are both 45°-60°; there is a spacing of 15-80 mm between each lateral flow wing inclined plates (231), a spacing of 5-40 mm between each lateral flow inclined plates (232), and a spacing of 15-80 mm between the lateral flow wing inclined plates (231) on the outside and the wing inclined plate chamber housing (24).

3. The shallow water dynamic sand removal and water intake head according to claim 1, characterized in that: The lateral flow wing inclined plate (231) has the side where the water inlet grid plate group (1) is located as the front, and the upper wings of the lateral flow wing inclined plate (231) are perpendicular to the inclined plate and are installed at equal intervals. The length of the wings is consistent with the width of the inclined plate, and the height of the wings gradually increases from front to back.

4. The shallow water dynamic sand removal and water intake head according to claim 1, characterized in that: The first choke hopper (221), the second choke hopper (222), and the third choke hopper (223) have the same shape and opening; the length of the hopper opening of the first choke hopper (221), the second choke hopper (222), and the third choke hopper (223) is consistent with the length of the lower base of the trapezoidal cross-section of the vane inclined plate chamber shell (24); the horizontal inclination angle of the four hopper walls of the first choke hopper (221), the second choke hopper (222), and the third choke hopper (223) is consistent, which is 45-60 degrees.

5. The shallow water dynamic sand removal and water intake head according to claim 1, characterized in that: The short-flow prevention plate (2211) is a trapezoidal thin plate, and the water flow direction at the designated water intake head is from the water inlet grid plate group (1) to the water collecting chamber (4). The upper and lower bases of the trapezoidal shape of the short-flow prevention plate (2211) are perpendicular to the water flow direction. The short-flow prevention plate (2211) is connected to the inner sides of the two side surfaces (227) of the mud bucket of the first flow-blocking mud bucket (221) through the two sides of the trapezoidal shape of the short-flow prevention plate (2211). After the short-flow prevention plate (2211) is installed, the lower end thereof is higher than the upper edge of the mud discharge port (224). The upper inclined plate (2221) is arranged with the long side of the trapezoidal bottom side perpendicular to the water flow direction, and the two sides of the upper inclined plate (2221) are connected to the inner sides of the two side surfaces (227) of the mud bucket of the second flow-blocking mud bucket (222), with the designated side of the water inlet grid plate group (1) as the front, and the upper inclined plate (2221) is inclined backward, with the inclination angle consistent with the inclination angle of the four walls of the mud bucket, and the inclined plates are spaced equally. The baffle plate (2231) is an upstream baffle plate (2221) with racks on its bottom surface. A plurality of racks are parallel to the upper and lower bottom edges of the trapezoidal bottom surface of the baffle plate (2231) and are arranged at equal intervals. The tooth surface is inclined relative to the bottom surface of the baffle plate (2231) in the direction of the shorter bottom edge of the trapezoid. The bottom surface of the baffle plate (2231) is taken as a horizontal plane and is horizontally inclined by 30-90 degrees.

6. The shallow water dynamic sand removal and water intake head according to claim 1, characterized in that: The bottom surface of the flow stabilizing plate (41) is in the same shape as the trapezoidal cross section of the blade ramp chamber housing (24) and has a thickness of 1-4 cm; the flow stabilizing plate (41) is placed perpendicular to the axis of the blade ramp chamber housing (24) inside the blade ramp chamber housing (24) and 20-200 mm behind the blade ramp assembly (23), with the upper portion and both sides closely fitting with the inner side of the water collecting chamber housing (42) and the height being consistent with the blade ramp chamber housing (24); The water collecting chamber housing (42) is connected to the wing inclined plate chamber housing (24) in front; the upper part and both sides of the water collecting chamber housing (42) are consistent in structure with the wing inclined plate chamber housing (24); the rear part of the water collecting chamber housing (42) is a trapezoidal inclined surface, which is inclined forward with the shorter bottom side of the trapezoid as the axis, and the horizontal inclination angle is greater than 40 degrees; the rear inclined surface of the water collecting chamber housing (42) is provided with a connector (422); the lower edge of the water collecting chamber housing (42) is sealed and connected to the rear edge of the flow blocking mud bucket group (22); A float opening (421) is provided in the middle of the top surface of the water collecting chamber housing (42), and the edge of the float opening (421) is raised to a height around the float opening (421), which is 5-10 mm higher than the thickness of the limit float (32).

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