An underwater sludge removal and dredging device

Abstract

This utility model discloses an underwater sludge removal and dredging device, which consists of a four-way underwater trolley, a submersible sludge pump, and a flexible outlet hose for the submersible sludge pump. First, the entire device is hoisted and lowered to the bottom of the pool to be dredged. The operator uses a GPS positioning system to input the coordinates of the pool's outline points into the system, thus determining the relative position of the four-way trolley to the pool. The trolley then moves along a predetermined route while the submersible sludge pump is activated, allowing the sludge and impurities at the bottom of the pool to be pumped to a collection device on the ground. This utility model achieves longitudinal and lateral movement by switching the drive wheels. A submersible sludge pump is mounted at the bottom of the trolley, and its outlet is connected to a flexible hose with a float ball, achieving the purpose of discharging the sludge from the pool bottom to a designated collection device outside the pool.

Description

Technical Field

[0001] This utility model relates to an underwater sludge removal and dredging device. Background Technology

[0002] After a wastewater treatment plant has been operating for a period of time, sludge removal and cleaning of the treatment tanks becomes a complex and challenging problem. The accumulation of large amounts of sludge and impurities in the tanks affects the wastewater treatment effect, reducing efficiency and causing the effluent quality to fail to meet standards. At this point, sludge removal and cleaning are necessary to restore the treatment capacity. However, wastewater treatment plants operating at full capacity cannot be shut down for sludge removal and cleaning.

[0003] The main challenge in dredging wastewater treatment plant ponds lies in the high viscosity and density of the sludge, making it difficult to remove. Furthermore, the sludge may contain pathogens and heavy metals, which are corrosive to equipment and the environment. Currently, the commonly used dredging methods under conditions of uninterrupted water supply and production shutdown are mechanical dredging and biological dredging. Mechanical dredging involves using specialized excavators and sludge pumps to remove the sludge from the pond bottom, which is then transported to a sludge dewatering room for filter press treatment. The disadvantage of this method is that it cannot achieve complete coverage of the pond bottom. Biological dredging utilizes microorganisms to degrade the sludge, breaking it down into water and carbon dioxide, ultimately reducing sludge accumulation. While underwater dredging robots have emerged in recent years, they are rarely used in wastewater treatment plants. The biggest problem is their high cost, coupled with the need for corresponding monitoring and maintenance equipment. The robots involve multiple high-tech technologies, such as AI visual recognition and multi-sensor fusion, which increases the complexity and maintenance difficulty, resulting in high repair and upkeep costs. Core components of the robots, such as sensors and motors, require regular maintenance and replacement, further increasing operating costs. Summary of the Invention

[0004] The purpose of this utility model is to provide an underwater sludge removal and dredging device that can carry out sludge removal and dredging without interrupting water supply, thereby effectively reducing the environmental risks of substandard sewage treatment and greatly improving the reliability and safety of sewage treatment operation.

[0005] The specific technical solution is as follows: an underwater sludge removal and dredging device, including a GPS positioning system, a four-way traveling trolley, and a sludge removal submersible pump. The four-way traveling trolley consists of an outer frame and an inner frame. An L-shaped support arm is vertically fixed to the top surface of each of the four corners of the outer frame. The upper ends of the support arms are bent inwards and vertically fixed to a lifting screw assembly. The lower ends of the screws of the lifting screw assemblies are connected to the four corners of the inner frame via thrust bearings. Synchronous gears are also provided at the lower parts of the screws of the four lifting screw assemblies, and the four synchronous gears are connected by a synchronous belt. A drive motor is installed at the top of one of the lifting screw assemblies, which drives the screw of that lifting screw assembly to rotate, thereby driving the other three lifting screw assemblies to move synchronously through the synchronous belt, thus raising and lowering the inner frame of the trolley. A sludge removal submersible pump is fixedly installed in the middle of the inner frame of the trolley. A sludge removal hose is connected to the pump, and several floats are evenly spaced on the hose. The inner frame of the vehicle has four lateral travel wheels installed on its front and rear sides, and the outer frame has four longitudinal travel wheels installed on its left and right sides. When the vehicle needs to move laterally, the outer frame, along with the longitudinal travel wheels, is raised to its highest position. When the vehicle needs to move longitudinally, the outer frame is lowered to lift the inner frame in the middle, along with the lateral travel wheels, and lowered to its lowest position. The inner frame has two longitudinal shafts for the lateral travel wheels, and the outer frame has two transverse shafts for the longitudinal travel wheels. A synchronous drive gearbox for the transverse and longitudinal shafts is installed on the inner frame, and a motor is mounted on this gearbox. One longitudinal shaft and one transverse shaft are connected to the drive gearbox. All eight travel wheels are powered by the motor driving the synchronous drive gearbox. A longitudinal four-wheel drive synchronous belt is installed between the two longitudinal shafts, and a transverse four-wheel drive synchronous belt is installed between the two transverse shafts to achieve four-wheel drive functionality in both the lateral and longitudinal directions. Universal drive shafts are installed at both ends of the two transverse shafts to drive the longitudinal travel wheels.

[0006] During operation, the entire set of equipment is first hoisted and lowered to the bottom of the pool that needs to be dredged. The operator uses the GPS positioning system to input the coordinates of the pool's outline points into the system. At this point, the relative position of the four-way traveling trolley and the pool is determined. The four-way traveling trolley is then operated to start moving along the predetermined route, and the sludge pump is turned on. At this time, the sludge and impurities at the bottom of the pool can be pumped to the collection device on the ground.

[0007] This invention achieves longitudinal and lateral movement by switching drive wheels. The trolley is equipped with a GPS positioning system, allowing operators to clearly track its trajectory and thus achieve full coverage cleaning of the pool bottom. A submersible sludge pump is mounted at the bottom of the trolley, with its outlet connected to a flexible hose with a float ball, discharging the sludge from the pool bottom to a designated collection point outside the pool. This device has a simple structure, is portable and convenient to operate, and can be lowered for cleaning without interrupting the water supply, effectively removing sludge from the pool bottom.

[0008] Compared with the prior art, the advantages of the present invention are: 1. The equipment has a simple structure, low difficulty in processing and manufacturing parts, and low production cost; 2. It is easy to install and fix, and can be hoisted into the pool; 3. It can easily achieve sludge removal at the bottom of the pool without stopping the water flow; 4. The trolley can travel in four directions to achieve full coverage of the bottom of the pool; 5. The structure is safe and reliable to ensure long-term operation. Attached Figure Description

[0009] Figure 1 This is the front view of the present invention; Figure 2 This is a top view of the present invention; Figure 3 This is a perspective view of the walking trolley of this utility model; Figure 4 This is a top view of the walking trolley of this utility model; Figure 5 This is the front view of the walking trolley of this utility model. Detailed Implementation

[0010] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0011] An underwater sludge removal and dredging device, such as Figure 1 , 2As shown in Figures 3, 4, and 5, the system includes a GPS positioning system, a four-way trolley 21, and a sludge pump 10. The GPS positioning system is used to determine the position of the trolley within the pool. The four-way trolley 21 consists of an outer frame 3 and an inner frame 7. An L-shaped support arm 14 is vertically fixed to the top surface of each of the four corners of the outer frame 3. The upper ends of the support arms 14 are bent inwards and vertically fixed to a lifting screw assembly 2. The lower ends of the screws in the lifting screw assemblies 2 are connected to the four corners of the inner frame 7 via thrust bearings. Synchronous gears are also provided at the lower parts of the screws in the four lifting screw assemblies 2, and the four synchronous gears are synchronized. The system is connected by a synchronous belt 11. One of the lifting screw assemblies 2 is equipped with a drive motor 1 at its top. The drive motor 1 drives the screw of the lifting screw assembly 2 to rotate, and then drives the other three lifting screw assemblies 2 to move synchronously through the synchronous belt 11, thereby raising and lowering the inner frame 7 of the trolley. A sludge discharge submersible pump 10 is fixedly installed in the middle of the inner frame 7 of the trolley. A sludge discharge hose 23 is connected to the sludge discharge hose 23. Several floats 24 are evenly spaced on the sludge discharge hose 23. The buoyancy of the floats 24 is used to support the hose 23, which greatly reduces the oblique drag force of the hose on the four-way traveling trolley, thereby ensuring that the four-way traveling trolley travels smoothly and performs full-position coverage sludge removal of the pool bottom according to the predetermined trajectory.

[0012] The inner frame 7 of the trolley has four transverse travel wheels 6 installed on its front and rear sides, and the outer frame 3 of the trolley has four longitudinal travel wheels 4 installed on its left and right sides. When the trolley needs to move laterally, the drive motor 1 simply rotates the screw of a lifting screw assembly 2 to raise the outer frame 3 along with the longitudinal travel wheels to its highest position. When the trolley needs to move longitudinally, the outer frame 3 is lowered to lift the inner frame 7 in the middle, along with the transverse travel wheels, and lowered to its lowest position. The inner frame 7 has two longitudinal shafts for the transverse travel wheels 6, and the outer frame 3 has two longitudinal shafts for the longitudinal travel wheels 4. A horizontal axis and a longitudinal axis synchronous drive gearbox 8 are installed on the inner frame 7 of the vehicle. A motor 9 is installed on the drive gearbox 8. One longitudinal axis and one horizontal axis are respectively connected to the drive gearbox 8. A longitudinal four-wheel drive synchronous belt 12 is installed between the two longitudinal axes and a transverse four-wheel drive synchronous belt 13 is installed between the two horizontal axes. Universal drive shafts 5 are respectively installed at both ends of the two horizontal axes to drive the longitudinal driving wheels 4 to rotate. All eight driving wheels are driven by a motor 9 to drive the longitudinal axis synchronous drive gearbox 8 and the synchronous belts 12 and 13 to realize the four-wheel drive function of the vehicle in the horizontal and longitudinal directions.

Claims

1. An underwater sludge removal and dredging device, comprising a GPS positioning system, a four-way traveling trolley (21), and a sludge removal submersible pump (10), characterized in that: The four-way traveling trolley (21) is composed of an outer frame (3) and an inner frame (7). An L-shaped support arm (14) is vertically fixed to the top surface of each of the four corners of the outer frame (3). The upper ends of the support arms (14) are bent inward and vertically fixed to a lifting screw assembly (2). The lower ends of the screws of the lifting screw assemblies (2) are connected to the four corners of the inner frame (7) of the trolley through thrust bearings. Synchronous gears are also provided at the lower parts of the screws of the four lifting screw assemblies (2). The four synchronous gears are driven by a synchronous belt (11). Connected, one of the lifting screw assemblies (2) is equipped with a drive motor (1) at its top. The drive motor (1) drives the screw of one lifting screw assembly (2) to rotate, and then drives the other three lifting screw assemblies (2) to move synchronously through the synchronous belt (11), thereby driving the inner frame (7) of the trolley to rise and fall. A sludge discharge submersible pump (10) is fixedly installed in the middle of the inner frame (7). A sludge discharge hose (23) is connected to the sludge discharge pump (10). Several floats (24) are evenly spaced on the sludge discharge hose (23). The front and rear sides of the inner frame (7) are divided into The outer frame (3) of the vehicle is equipped with four lateral travel wheels (6), and four longitudinal travel wheels (4) are installed on the left and right sides of the outer frame (3). When the vehicle needs to move laterally, the outer frame (3) along with the longitudinal travel wheels is raised to the highest position. When the vehicle needs to move longitudinally, the outer frame (3) is lowered to lift the inner frame (7) in the middle, along with the lateral travel wheels, and lowered to the lowest position. The inner frame (7) of the vehicle is equipped with two longitudinal axles of the lateral travel wheels (6), and the outer frame (3) of the vehicle is equipped with two transverse axles of the longitudinal travel wheels (4). A horizontal and vertical axis synchronous drive gearbox (8) is provided, and a motor (9) is provided on the drive gearbox (8). One of the vertical axes and one of the horizontal axes are connected to the drive gearbox (8) respectively. All eight driving wheels are driven by the motor (9) to realize power transmission through the horizontal and vertical axis synchronous drive gearbox (8). A longitudinal four-wheel drive synchronous belt (12) is installed between the two vertical axes and a transverse four-wheel drive synchronous belt (13) is installed between the two horizontal axes to realize the four-wheel drive function in the horizontal and vertical directions. Universal drive shafts (5) are provided at both ends of the two horizontal axes to drive the longitudinal driving wheels (4) to rotate.

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