A hydraulic engineering rehabilitation device for treating a contaminated body of water

Abstract

The application relates to a hydraulic engineering repairing device for treating sewage, and relates to the technical field of water pollution, and comprises a floating plate, a shell, an aeration device, a conveying pump, a suction pipe, an agitating piece, a cavity reducing device, a liquid storage device and a liquid suction head. The application can solve the problem that the existing technology forcibly pumps bottom sewage to the surface layer, which destroys the original temperature stratification of the water body, easily causes phosphorus in the bottom mud to be transferred to the surface light enrichment area, thereby causing blue-green algae outbreak, and when treating high-concentration pollution in the bottom layer, the device only relies on single physical aeration, lacks the cooperation of chemical agents, and the bottom sludge is difficult to be effectively turned up, so that the purification efficiency of deep-layer hydrogen sulfide and other pollutants is extremely low, and deep-water bottom layer repairing work is difficult to smoothly carry out and the like.

Description

Technical Field

[0001] This invention relates to the field of water pollution-related technologies, and in particular to a water conservancy project repair device for treating polluted bodies. Background Technology

[0002] In the process of building a water ecological restoration system, in-situ water treatment and technologies such as deep aeration are closely linked. With the accumulation of urban domestic sewage discharge and agricultural non-point source pollution, many lakes or reservoirs face serious endogenous pollution problems. The sediment at the bottom of these lakes or reservoirs is rich in harmful substances such as hydrogen sulfide, ammonia nitrogen, and released phosphorus. These pollutants are continuously released into the water body in an oxygen-deficient environment. It is necessary to rely on deep aeration and physical disturbance equipment to break up the sediment and release it for treatment, in conjunction with the degradation by aerobic microorganisms, in order to break up the anaerobic environment at the bottom and restore the ecological health of the water body. Aerators or flow promoters are usually used for the remediation of the polluted water body.

[0003] Existing aeration devices, such as Chinese Patent Publication No. CN221166244U, are installed in sewage tanks. These devices include an aeration component, a support component, a guide rail, and a lifting component. The support component is connected to the bottom of the aeration component, and the guide rail is located on the side wall of the sewage tank. The support component is slidably connected to the guide rail in the vertical direction. One end of the lifting component is rotatably connected to the periphery of the sewage tank, and the other end is connected to the support component. When the support component moves along the guide rail to a height higher than the sewage tank, the lifting component can rotate to move the support component and place it on the periphery of the sewage tank. The aeration device provided in this embodiment uses the lifting component to lift the support component and rotate it to place it on the periphery of the sewage tank, or lifts the support component and lowers it along the guide rail to the bottom of the sewage tank, thereby improving the efficiency of maintenance and installation of the aeration device.

[0004] The aforementioned technologies primarily achieve water oxygenation by directly releasing bubbles from the water surface. However, this device has significant flaws in its in-situ treatment logic. Forcibly pumping bottom sewage to the surface disrupts the original temperature stratification of the water body, easily causing phosphorus in the bottom sediment to transfer to the light-rich surface area, thus triggering a blue-green algae bloom. Furthermore, when treating high-concentration pollution at the bottom, the device relies solely on physical aeration, lacking the synergistic effect of chemical agents, and the bottom sludge is difficult to effectively stir up, resulting in extremely low purification efficiency for pollutants such as hydrogen sulfide in deep water. This makes it difficult to carry out remediation work on the deep bottom layer. Therefore, there is still room for improvement beyond the existing technology. Summary of the Invention

[0005] The purpose of this invention is to provide a water conservancy engineering repair device for treating wastewater, aiming to improve purification efficiency.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A hydraulic engineering repair device for treating polluted water bodies includes: a float plate; a shell installed at the lower center of the float plate, with a liftable aeration device inside the shell, the upper end of which is connected to a delivery pump installed on the float plate; a suction pipe connected to the lower end of the aeration device, with an agitator connected to the lower end of the suction pipe, and a constriction device connected between one side of the middle of the suction pipe and the lower end of the shell; and a liquid storage device attached to the left outer wall of the shell, with a suction head installed between the lower right side of the liquid storage device and the suction pipe.

[0007] As a preferred embodiment of the present invention, the aeration device includes a lifting block, which is slidably disposed inside the housing and connected to the housing by an electric push rod. A conveying cavity that runs vertically through the middle of the lifting block is provided, and a movable opening is provided at the left end of the lifting block. An interface component is slidably disposed inside the movable opening, and the upper left side of the interface component is connected to the aeration pump through a telescopic tube.

[0008] As a preferred embodiment of the present invention, the upper end of the conveying chamber is connected to the U-shaped tube via a telescopic sleeve, the U-shaped tube is connected to the conveying pump, and the lower end of the conveying chamber is connected to the suction pipe.

[0009] As a preferred embodiment of the present invention, the upper and lower ends of the movable port are symmetrically provided with movable slots.

[0010] As a preferred embodiment of the present invention, the interface component includes an aeration head, with sealing plates symmetrically arranged at the upper and lower ends of the aeration head. The sealing plates are slidably arranged in the movable groove. An air outlet is opened inside the aeration head, with an aeration port at the right end of the air outlet. A connecting block is connected to the middle of the air outlet, and the connecting block is connected to the plug head through an elastic telescopic rod. An air inlet is located on the upper left side of the air outlet.

[0011] As a preferred embodiment of the present invention, the middle part of the air outlet cavity is an expanded oral cavity, the left end of the expanded oral cavity is an arc-shaped surface, and the plug head at the initial position fits against the arc-shaped surface of the expanded oral cavity to block the air outlet cavity.

[0012] As a preferred embodiment of the present invention, the agitator includes an agitator block, which is sleeved at the lower end of the suction tube. The lower end of the agitator block has a spherical structure, and a plunger is uniformly arranged around the periphery of the agitator block. An L-shaped piece is connected around the periphery of the plunger by a pin.

[0013] As a preferred embodiment of the present invention, the cavity shrinking device includes a guide frame, which is installed at the lower end of the housing. The inner wall of the guide frame is provided with a guide surface. A blocking member that forms a compression contact with the guide surface is horizontally slidably disposed in the connecting seat, and the blocking member and the connecting seat are elastically connected. The connecting seat is installed on the outer wall of the suction tube.

[0014] As a preferred embodiment of the present invention, the middle slope of the guide surface gradually slopes to the right from top to bottom, and the upper right side of the blocking member has a chamfered surface structure.

[0015] As a preferred embodiment of the present invention, the liquid storage device includes a liquid storage frame, which is attached to the left outer wall of the housing. The upper end of the liquid storage frame is provided with a feed inlet, and the bottom of the inner cavity of the liquid storage frame gradually slopes downward from left to right.

[0016] As a preferred embodiment of the present invention, the suction head includes a connecting pipe, which is connected to the lower right side of the liquid storage frame, and a reinforcing rib is connected between the connecting pipe and the liquid storage frame. Output holes are evenly distributed at the right end of the connecting pipe, and an L-shaped partition plate is slidably disposed at the right end of the connecting pipe. The partition plate is evenly distributed with docking holes corresponding to the positions of the output holes. The lower end of the partition plate is elastically connected to the connecting pipe, and the upper end of the partition plate is a horizontal part. The docking interface corresponding to the position of the connecting pipe is connected and disposed at the left end of the suction tube. Guide blocks are symmetrically installed at the front and rear ends of the connecting pipe, and the guide blocks are slidably disposed between the guide rails. The guide rails are installed on the left outer wall of the suction tube.

[0017] In summary, this application includes the following beneficial technical effects: 1. This application utilizes the coordinated operation of an aeration device, a transfer pump, and a U-shaped pipe to shift the aeration zone from the traditional surface layer to the middle layer of the water. After the bottom wastewater is pumped into the middle layer to release air bubbles for treatment, the oxygen-rich water flows smoothly back to the bottom layer through the U-shaped pipe. The operation of each component is seamless, achieving "bottom water restoration in the middle and bottom layers" without disrupting the surface water temperature stratification, effectively avoiding surface odor emission and blue-green algae blooms. 2. This application adds a liquid storage device and a liquid suction head during the remediation process, so that the purification liquid can be sucked in and mixed with the bottom sewage at the same time. Through the synergistic effect of physical aeration and chemical agents, the purification of harmful substances in sewage is accelerated, which significantly improves the purification efficiency and treatment effect of deep-seated pollutants. 3. The suction head in this application adopts a mechanical linkage structure of partition plate and cavity shrinking device. The upward movement of the suction tube drives the partition plate to slide so that the hole is aligned with the drug. At the same time, the cavity shrinking device reduces the bottom suction port to increase the suction power. This design can automatically complete the intermittent quantitative suction of the drug solution without additional power, which not only ensures the uniformity of mixing, but also prevents the potential ecological negative impact caused by excessive drug addition. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is an overall sectional view of the present invention; Figure 3 This is the invention Figure 2A magnified view of the area at point X; Figure 4 This is the invention Figure 2 A magnified view of the area at point Y; Figure 5 This is the invention Figure 2 A magnified view of the Z-axis; Figure 6 This is the invention Figure 2 A magnified view of part A; Figure 7 This is a schematic diagram of the position locking state between the present invention and the support bracket; Figure 8 This is a schematic diagram of the position locking state between the present invention and the traction rope.

[0019] Explanation of reference numerals in the attached drawings: 1. Float; 2. Shell; 3. Aeration device; 31. Lifting block; 32. Electric push rod; 33. Conveying chamber; 34. Movable port; 35. Interface component; 351. Aeration head; 352. Sealing plate; 353. Air outlet chamber; 354. Aeration port; 355. Connecting block; 356. Elastic telescopic rod; 357. Plug head; 36. Aeration pump; 37. Telescopic pipe; 38. Telescopic sleeve; 39. U-shaped pipe; 4. Conveying pump; 5. Suction pipe; 6. Agitator; 61. Agitator block; 62. Plunger; 63. L-shaped part; 7. Cavity reduction device; 71. Guide frame; 72. Guide surface; 73. Blocking part; 74. Connecting seat; 8. Liquid storage device; 81. Liquid storage frame; 82. Feed inlet; 9. Suction head; 91. Connecting pipe; 92. Reinforcing rib; 93. Output hole; 94. Partition plate; 941. Connecting hole; 95. Connecting interface; 96. Guide block; 97. Guide track. Detailed Implementation

[0020] The following is in conjunction with the appendix Figures 1 to 8 This application will be described in further detail.

[0021] This application discloses a water conservancy engineering repair device for treating wastewater. This application moves the aeration zone from the upper layer to the water, bringing the wastewater rich in hydrogen sulfide and ammonia nitrogen from the bottom to the middle layer for aeration without disrupting the surface water temperature. This avoids the surface water emitting foul odors, triggering algae blooms, and turning the water green. At the same time, it mixes the bottom wastewater with chemicals, improving the purification effect.

[0022] Reference Figures 1 to 2As shown in the figure, this embodiment discloses a water conservancy engineering repair device for treating sewage, including a float plate 1, a shell 2, an aeration device 3, a delivery pump 4, a suction pipe 5, an agitator 6, a constriction device 7, a storage device 8, and a suction head 9. The float plate 1 is a fixed foundation, and the shell 2 is installed at the lower center of the float plate 1. The aeration device 3, which can be raised and lowered, is installed inside the shell 2. The upper end of the aeration device 3 is connected to the delivery pump 4 installed on the float plate 1. The suction pipe 5 is connected to the lower end of the aeration device 3. The lower end of the suction pipe 5 is connected to the agitator 6. The constriction device 7 is connected between the middle side of the suction pipe 5 and the lower end of the shell 2. When the medicine is sucked out of the storage device 8, the constriction device 7 narrows the suction port at the lower end of the suction pipe 5, thereby increasing the suction force of the suction head 9 and improving the stability of the medicine being sucked into the sewage from the storage device 8. The storage device 8 is attached to the left outer wall of the shell 2. The suction head 9 is installed between the lower right side of the storage device 8 and the suction pipe 5.

[0023] In actual operation, float plate 1 is floated on the water surface, and can then be supported by a support frame (such as...). Figure 7 ) or a traction rope (such as Figure 8 The aeration device 3 connects to the bottom of the water, thereby locking the position of the float 1. In actual use, the aeration device 3 lifts and lowers the suction pipe 5, and the synchronously lifting agitator 6 stirs the bottom of the water, thereby disturbing the sludge layer. This causes pollutants such as hydrogen sulfide and ammonia nitrogen deposited at the bottom of the water to be sucked into the suction pipe 5 along with the water flow. At this time, the purification solution in the storage device 8 is quantitatively mixed with the sewage flow in the suction pipe 5 through the suction head 9. The solution and sewage are initially mixed during the flow. Subsequently, the sewage mixed with the solution is pumped into the aeration device 3 by the delivery pump 4. The aeration device 3 is in the water A large number of microbubbles are released at a specific depth (middle layer). These bubbles come into full contact with the wastewater, which on the one hand removes harmful gases (such as hydrogen sulfide) from the water and allows them to diffuse out of the water body, preventing them from accumulating on the surface and emitting foul odors. On the other hand, the oxygen in the bubbles can promote the activity of aerobic microorganisms in the water and accelerate the decomposition of pollutants. Throughout the process, because the aeration zone is located in the middle layer of the water, it avoids the damage to the surface temperature of the water body caused by traditional surface aeration, thereby reducing the problems of cyanobacterial blooms and eutrophication caused by changes in water temperature stratification, and significantly improving the remediation effect of the wastewater.

[0024] Reference Figures 1 to 3As shown, the aeration device 3 includes a lifting block 31, which is slidably disposed inside the housing 2. An electric push rod 32 is connected between the lifting block 31 and the housing 2. A conveying chamber 33 is provided in the middle of the lifting block 31, and an movable port 34 is provided at the left end of the lifting block 31. An interface 35 is slidably disposed inside the movable port 34. The upper left side of the interface 35 is connected to the aeration pump 36 through a telescopic pipe 37. The upper end of the conveying chamber 33 is connected to the U-shaped pipe 39 through a telescopic sleeve 38. The U-shaped pipe 39 is connected to the conveying pump 4. The lower end of the conveying chamber 33 is connected to the suction pipe 5. The outlet at the lower right end of the U-shaped pipe 39 is located in the middle area of ​​the water layer, ensuring that the treated oxygen-rich water flows back to the middle layer area and then flows back to the bottom layer under the action of gravity. This achieves zero-interference in-situ treatment of 'bottom water repair at the bottom layer' and reduces the risk of cyanobacteria bloom caused by the transfer of phosphorus from the bottom sediment to the surface light-rich area.

[0025] Reference Figure 3 As shown, the movable port 34 has symmetrical movable grooves at its upper and lower ends; the interface component 35 includes an aeration head 351, with sealing plates 352 symmetrically arranged at its upper and lower ends. The sealing plates 352 are slidably arranged in the movable grooves. An air outlet chamber 353 is provided inside the aeration head 351, and an aeration port 354 is provided at the right end of the air outlet chamber 353. A connecting block 355 is connected to the middle of the air outlet chamber 351, and the connecting block 355 is connected to the blockage via an elastic telescopic rod 356. The head 357 is connected, and the elastic telescopic rod 356 always ensures that the blocking head 357 is pushed to the left. The upper left side of the air outlet 351 is the air inlet. The middle part of the air outlet 351 is the expansion cavity, and the left end of the expansion cavity is an arc-shaped surface. The blocking head 357 in the initial position fits against the arc-shaped surface of the expansion cavity to block the air outlet 351. After the blocking head 357 moves to the right under the push of air, a gap is formed between the blocking head 357 and the expansion cavity, at which time the gas can be delivered smoothly.

[0026] During the actual aeration process, the electric push rod 32 drives the lifting block 31 and the suction pipe 5 to rise and fall synchronously (the lifting process is a rapid descent, a slow return, and a brief stop when it reaches the highest position), which causes the agitator 6 to stir the bottom of the water, thereby disturbing the sludge layer. At the same time, the sewage at the bottom is pumped into the suction pipe 5 by the delivery pump 4, and air is blown into the air outlet chamber 353 by the aeration pump 36. After blowing the plug head 357 to the right, a gap is formed between the plug head 357 and the air outlet chamber 353. Subsequently, air is blown into the delivery chamber 33 from the aeration port 354 for aeration.

[0027] Reference Figure 4As shown, the stirring component 6 includes a stirring block 61, which is sleeved at the lower end of the suction pipe 5. The lower end of the stirring block 61 has a spherical structure. The periphery of the stirring block 61 is uniformly provided with a lowering member 62, and the periphery of the lowering member 62 is connected to an L-shaped member 63 by a pin.

[0028] During the actual agitation process, as the suction pipe 5 rises and falls, the agitation block 61 expands the resistance of the area, causing water to surge at the bottom of the water. The lowering part 62 inserts into the sludge at the bottom of the water and subsequently lifts the sludge. When the agitation block 61 descends, the lowering part 62 inserts into the sludge layer first. As the agitation block 61 continues to move downward, the short arm end of the L-shaped part 63 contacts the sludge surface and is subjected to upward resistance. When the agitation block 61 rises, the L-shaped part 63 returns to its drooping state under the action of gravity. Its long arm end scrapes and drags the sludge below downward, further breaking up and turning over the deposited sludge, enhancing the disturbance effect on the sludge layer at the bottom of the water, and allowing more deep-seated pollutants to be sucked in and treated by the suction pipe 5 with the water flow.

[0029] Reference Figure 5 As shown, the cavity-shrinking device 7 includes a guide frame 71, which is installed at the lower end of the housing 2. The inner wall of the guide frame 71 is provided with a guide surface 72. A blocking member 73, which forms a pressing contact with the guide surface 72, is horizontally slidably disposed in the connecting seat 74. The blocking member 73 and the connecting seat 74 are elastically connected. Under the elastic action, the blocking member 73 is always in a tendency to push to the right. The connecting seat 74 is installed on the outer wall of the suction pipe 5. The middle slope of the guide surface 72 is gradually inclined to the right from top to bottom, and the upper right side of the blocking member 73 is a chamfered surface structure. The chamfered surface structure reduces the resistance of the pressure buildup.

[0030] Reference Figure 2 As shown, the liquid storage device 8 includes a liquid storage frame 81, which is attached to the left outer wall of the housing 2. The upper end of the liquid storage frame 81 is provided with a feed inlet 82. The bottom of the inner cavity of the liquid storage frame 81 is gradually inclined downward from left to right, which ensures that the residual liquid is also concentrated in the vicinity of the connecting pipe 91.

[0031] Reference Figure 1 , Figure 2 , Figure 6As shown, the suction head 9 includes a connecting pipe 91, which is connected to the lower right side of the liquid storage frame 81. A reinforcing rib 92 connects the connecting pipe 91 and the liquid storage frame 81, improving the stability of the connection. Output holes 93 are evenly distributed on the right end of the connecting pipe 91. An L-shaped partition plate 94 is slidably disposed on the right end of the connecting pipe 91. The partition plate 94 has evenly distributed mating holes 941 corresponding to the positions of the output holes 93. When the partition plate 94 is not at its highest position, the output holes... 93. The docking hole 941 is staggered. The lower end of the partition plate 94 is elastically connected to the connecting pipe 91. Under the elastic action, the partition plate 94 always maintains a downward pulling tendency. The upper end of the partition plate 94 is a horizontal part, which is connected to the docking interface 95 corresponding to the position of the connecting pipe 91 and is located at the left end of the suction pipe 5. The front and rear ends of the connecting pipe 91 are symmetrically equipped with guide blocks 96. The guide blocks 96 are slidably arranged between the guide rails 97. The guide rails 97 are installed on the left outer wall of the suction pipe 5.

[0032] During the actual drug input process, as the suction pipe 5 rises and falls, the drug in the storage box 81 is intermittently input from the suction head 9 into the suction pipe 5. The specific steps are as follows: When the suction pipe 5 is not at its highest position, the docking hole 941 and the output hole 93 in the partition plate 94 are misaligned (at this time, they are in a blocked state), and the drug cannot enter the suction pipe 5. At this time, the blocking member 73 is not squeezed into the interior of the suction pipe 5, and the suction pipe 5 circulates the sewage at the bottom at its maximum suction capacity. As the suction pipe 5 is about to rise to its highest position, the interface 95 and the lateral part of the partition plate 94 come into contact and rise synchronously, and the blocking member 73 gradually moves to the left along the guide surface 72. When the suction pipe 5 rises to its highest position, the interface 95 pushes the partition plate 94 to its highest position. At this time, the docking hole 941 in the partition plate 94 aligns with the output hole 93, and the left half of the blocking member 73 extends into the interior of the suction pipe 5. At this time, the bottom suction port of the suction pipe 5 narrows, which increases the suction force in the interface 95. This allows the liquid in the storage frame 81 to enter the interface pipe 91 and quickly pass through the output hole 93 in the through hole state, thereby contacting the suctioned sewage. The intermittent suction of the liquid allows it to mix thoroughly with the sewage, avoiding the problem of excessively high or low local concentration caused by continuous mixing of the liquid. This ensures the utilization efficiency of the agent and prevents the negative impact that excessive agent may have on the aquatic ecosystem.

[0033] Working principle: Step 1: Float 1 floats on the water surface and is locked in position; Step 2: The electric push rod 32 drives the lifting block 31 and the suction pipe 5 to rise and fall synchronously, so that the stirring element 6 stirs the bottom of the water, thereby disturbing the sludge layer. At the same time, the sewage at the bottom is pumped into the suction pipe 5 by the delivery pump 4, and the air is blown into the delivery chamber 33 from the aeration port 354 by the aeration pump 36, so as to mix and aerate with the sewage. Step 3: At the same time, the purification solution in the storage device 8 is intermittently and quantitatively mixed with the sewage flow in the suction pipe 5 through the suction head 9. The solution and sewage are mixed during the flow process. The sewage mixed with the solution is pumped into the aeration device 3 by the delivery pump 4. The aeration device 3 releases a large number of tiny bubbles in the middle layer of the water, thereby performing aeration.

[0034] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A hydraulic engineering repair device for treating polluted water bodies, characterized in that, include: Floating board; The shell is installed at the lower center of the float plate. Inside the shell is a liftable aeration device. The upper end of the aeration device is connected to a delivery pump installed on the float plate. The suction pipe is connected to the lower end of the aeration device. The lower end of the suction pipe is connected to an agitator, and a constriction device is connected between the middle side of the suction pipe and the lower end of the shell. The liquid storage device is attached to the left outer wall of the housing, and a suction head is provided between the lower right side of the liquid storage device and the suction pipe.

2. The water conservancy project repair equipment for treating polluted water bodies according to claim 1, characterized in that: The aeration device includes a lifting block, which is slidably disposed inside the housing. An electric push rod is connected between the lifting block and the housing. A conveying chamber that runs vertically through the middle of the lifting block is provided. A movable opening is provided at the left end of the lifting block. An interface component is slidably disposed inside the movable opening. The upper left side of the interface component is connected to the aeration pump through a telescopic tube.

3. The water conservancy project repair equipment for treating polluted water bodies according to claim 2, characterized in that: The upper end of the delivery chamber is connected to the U-shaped tube via a telescopic sleeve, and the U-shaped tube is connected to the delivery pump. The lower end of the delivery chamber is connected to the suction pipe.

4. A water conservancy project repair device for treating polluted water bodies according to claim 2, characterized in that: The upper and lower ends of the movable port are symmetrically provided with movable slots; The interface component includes an aeration head, with sealing plates symmetrically arranged at the upper and lower ends of the aeration head. The sealing plates are slidably arranged in the movable groove. An air outlet is opened inside the aeration head, with an aeration port at the right end of the air outlet. A connecting block is connected to the middle of the air outlet, and the connecting block is connected to the plug head through an elastic telescopic rod. An air inlet is located on the upper left side of the air outlet.

5. A water conservancy project repair device for treating polluted water bodies according to claim 4, characterized in that: The middle part of the air outlet chamber is an expanded oral cavity, and the left end of the expanded oral cavity is an arc-shaped surface. The plug head in the initial position fits against the arc-shaped surface of the expanded oral cavity to block the air outlet chamber.

6. A water conservancy project repair device for treating polluted water bodies according to claim 1, characterized in that: The agitator includes an agitator block, which is sleeved at the lower end of the suction tube. The lower end of the agitator block has a spherical structure, and the periphery of the agitator block is uniformly provided with a plunger. The periphery of the plunger is connected to an L-shaped piece by a pin.

7. A water conservancy project repair device for treating polluted water bodies according to claim 1, characterized in that: The cavity reduction device includes a guide frame, which is installed at the lower end of the housing. The inner wall of the guide frame is provided with a guide surface. A blocking member that forms a pressing contact with the guide surface is horizontally slidably disposed in the connecting seat, and the blocking member and the connecting seat are elastically connected. The connecting seat is installed on the outer wall of the suction tube.

8. A water conservancy project repair device for treating polluted water bodies according to claim 7, characterized in that: The middle slope of the guide surface gradually slopes to the right from top to bottom, and the upper right side of the blocking component has a chamfered surface structure.

9. A water conservancy project repair device for treating polluted water bodies according to claim 1, characterized in that: The liquid storage device includes a liquid storage frame, which is attached to the left outer wall of the housing. The upper end of the liquid storage frame is provided with a feed inlet, and the bottom of the inner cavity of the liquid storage frame gradually slopes downward from left to right.

10. A water conservancy project repair device for treating polluted water bodies according to claim 9, characterized in that: The suction head includes a connecting pipe that is connected to the lower right side of the liquid storage frame, and a reinforcing rib is connected between the connecting pipe and the liquid storage frame. Output holes are evenly distributed at the right end of the connecting pipe. An L-shaped partition plate is slidably installed at the right end of the connecting pipe. The partition plate has evenly distributed docking holes corresponding to the positions of the output holes. The lower end of the partition plate is elastically connected to the connecting pipe. The upper end of the partition plate is a horizontal part, and the docking interface corresponding to the position of the connecting pipe is connected and installed at the left end of the suction tube. Guide blocks are symmetrically installed at the front and rear ends of the connecting pipe. The guide blocks are slidably installed between the guide rails. The guide rails are installed on the left outer wall of the suction tube.

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