A new pool bottom sludge removal device

Abstract

The application discloses a kind of pool bottom mud removal device and experimental method, including probe, probe signal receiver, imaging instrument, frequency conversion pump remote controller, frequency conversion pump signal receiver, mud flushing frequency conversion pump, mud suction frequency conversion pump, mud flushing pipe, mud suction pipe, shell, liquid seal plate, steering gear remote controller, liquid seal plate steering gear signal receiver, liquid seal plate steering gear, liquid seal plate mechanical skeleton, shell steering gear signal receiver, control connection steel pipe and shell steering gear, connecting steel pipe, truss, pool bottom, pool wall.The mud removal device of the application adopts the design concept of flushing and draining, has the advantages of fast mud draining speed, low power consumption and low water consumption, and is more suitable for bottom mud removal.The application is designed with a shell and a liquid seal plate, so that the bottom mud dispersed by the frequency conversion pump can be controlled within a certain range.According to the scanning results of the scanner, different mud flushing pump forces, distances from the liquid seal plate to the pool bottom and liquid seal plate structures can be used according to the thickness of the bottom mud and the degree of bottom mud hardening.Each section of the liquid seal plate can rotate and stretch.

Description

Technical Field

[0001] This invention relates to the field of water treatment and bottom sludge removal technology, specifically a novel, fast, efficient, and stable bottom sludge removal device, which is capable of removing compacted bottom sludge. Background Technology

[0002] To treat natural water bodies from water sources, water treatment plants add flocculants. These flocculants cause colloidal impurities in the water to aggregate into larger particles, known as flocs, through processes such as double-layer compression, adsorption neutralization, adsorption bridging, and netting / sweeping. The flocs then separate from the water through sedimentation, thus purifying the water. The separated flocs settle at the bottom of the tank, eventually forming sediment. If this sediment cannot be completely removed, various problems will arise. Typical sediment types include freshly settled floc aggregates, sticky sediment adsorbed at the bottom of the tank, and hardened floc aggregates. Freshly settled flocs are relatively easy to remove, but hardened and sticky sediments are difficult to remove with current processes, or the removal process may have adverse effects.

[0003] The bottom of the water treatment plant's pools is perpetually covered with a 5-20mm thick layer of sticky flocs, which cannot be removed even with daily scrubbing. Besides resulting in poor sensory quality, this sludge also harbors a large number of midge larvae that breed and nest within it. The main reason for this sludge buildup is the high content of algae and organic matter in the raw water. The water treatment plant recycles the sludge discharge from the sedimentation tank and the backwash water from the filter, allowing only simple natural sedimentation before returning it to the distribution well for reuse. The supernatant returning to the distribution well contains a large amount of loose flocs, exacerbating the sludge buildup. The sludge accumulation in the transition zone between the flocculation and sedimentation tanks is primarily caused by localized head loss due to the pleated walls, which reduce flow velocity and allow large flocs to settle and perforate in the transition zone. The sludge discharge pipes are under heavy load, and can only discharge a small portion of the sludge near the orifice. In some cases, the perforated pipes are even blocked. The sludge accumulation at the bottom of the transition zone between the flocculation tank and the sedimentation tank can be more than 2 meters thick. After fermentation, the sludge at the bottom rises to the surface in large chunks, resulting in extremely poor appearance and reducing the effective water depth in the transition zone, which also breaks up larger flocs. When polyacrylamide is used as a flocculant, the viscosity of the bottom sludge increases significantly, and if it is not discharged in time, it is prone to hardening. Polyacrylamide is a low-cost and highly effective flocculant. If the viscous and hardened bottom sludge produced by polyacrylamide cannot be effectively removed, it will have a negative impact on the promotion and use of polyacrylamide. The sedimentation tank has a large amount of sludge at the beginning, which may also be affected by the excessive thickness of sludge in the transition zone. The perforated water distribution wall spreads towards one side of the sedimentation tank, forming a slope that the sludge cannot be removed by the sludge removal vehicle. The sludge accumulation at the end of the sedimentation tank is mainly related to the effluent guide surface at the end. The sludge on this guide surface does not automatically slide to the bottom of the tank, making it impossible for the sludge removal vehicle to suck up the sludge here. The sludge thickness can reach 0.5-1.5m over a long period of time, which is also the reason why a large amount of flocs are carried out by the water flow and enter the filter. The clear water tank is closed, and in order to prevent turbid water from polluting the clear water, the sludge removal device is not frequently turned on, resulting in serious sludge caking problems. The clear water tank has a large bottom area, and the sludge removal device is mostly fixed and intermittently operated. Even if sludge is removed frequently, bottom sludge easily accumulates and caks in areas where the sludge removal device is not turned on. The sludge removal equipment cannot be turned on 24 hours a day, so a large amount of bottom sludge is prone to caking when it is not turned on. Due to the difficulty of cleaning, a lot of bottom sludge accumulates in the municipal water supply pipes over the years, which then caks and becomes even more difficult to remove.

[0004] Currently, most sludge removal devices in water treatment plants employ either mechanical or pump-assisted sludge removal methods. Mechanical sludge removal is unsuitable for water treatment plants because it leads to sediment buildup, affecting water quality. Once accumulated, it is difficult to remove and causes significant disturbance to the sediment at the bottom of the tank, damaging the waterproof coating. Furthermore, mechanical sludge removal cannot completely remove sediment, especially sticky sediment. Pump-assisted sludge removal, which uses flowing water to remove sediment, is effective for loose, small-particle sediment. However, its effectiveness is generally limited for more complex sediment types, such as sticky or compacted sediment. Using water pumps to remove sludge, relying solely on water suction, is ineffective, easily leading to sludge residue. Furthermore, the effective suction range is limited, leaving a significant portion of the sludge unremoved. Existing processes include a sludge removal device used in the transition zone between flocculation and sedimentation tanks. This device uses a pressurized water pipe installed on a perforated pipe for reverse backflushing. Water jets from the perforated pipe disperse the compacted sludge near the pipe opening. However, this device has a significant drawback: it can disperse the sludge and carry it into the upper water layer, causing substantial sludge diffusion. This diffusion into the upper clear water layer has a considerable impact. Currently, in water treatment processes, poor sludge removal or management can easily lead to sludge compaction at certain stages. If this is not prevented at its source or remedied after it forms, it will affect the normal operation of water or wastewater treatment plants and impact effluent quality. Moreover, existing processes have a low sludge removal speed, necessitating a faster sludge removal device. Summary of the Invention

[0005] The purpose of this invention is to provide a fast, efficient, and effective sludge removal device for compacted bottom mud, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a device for removing bottom sediment from a water tank, comprising a housing, a servo motor at the top of the housing, which is connected to a connecting steel pipe. The servo motor allows the housing to rotate around the servo motor and also adjusts the length of the connecting steel pipe. The connecting steel pipe is connected to a truss with a fixed elevation. The truss is connected to a motor on the shore, and the motor drives the truss to move forward or backward on a horizontal plane, thereby driving the entire device to move forward or backward. A through hole is opened at the top of the housing, through which a flushing pipe and a sludge pumping pipe extend into the housing. The flushing pipe and the sludge pumping pipe are connected to a flushing pump and a sludge pump. A liquid seal plate is connected to the bottom of the housing. The liquid seal plate consists of a mechanical frame, a servo motor, a remote controller, and a signal receiving mechanism. During normal operation, it has multiple groove structures with the groove openings facing the bottom of the water tank, and has the ability to manually adjust the rotation and extension of each mechanical frame segment. The device also includes a detector capable of detecting the thickness of the bottom sediment.

[0007] The outer shell and liquid sealing plate are submerged underwater, close to the bottom of the pool, and maintain a certain distance from the bottom of the pool.

[0008] The inlet of the flushing pipe connected to the flushing pump is located below the water surface;

[0009] The inlet of the suction pipe connected to the suction pump is located inside the outer casing, and the outlet is located outside the water tank via a truss.

[0010] The sludge flushing pump and sludge suction pump are variable frequency pumps, which can be manually adjusted in real time by a variable frequency pump remote control. The sludge flushing pump and sludge suction pump can be turned on and off at the same time, and the sludge flushing pump and sludge suction pump are equal at any time.

[0011] The bottom of the outer shell and the liquid seal plate must not be in contact with the bottom of the pool; otherwise, the bottom sludge cannot enter the sludge flushing range inside the outer shell.

[0012] The detector is linked to the frequency converter pump, liquid seal plate, housing, and connecting steel pipe adjustment. Based on the detector's scanning results and the degree of sediment compaction, it can adjust the flushing pump force and suction pump force at different sediment thicknesses and compaction levels according to the sediment thickness and the required force determined by the sediment compaction degree, using Bernoulli's equation. Formula for local head loss Calculations are performed to determine the required liquid seal plate structure that, under the conditions of accommodating the required flushing pump force, suction pump force, and the distance from the bottom of the liquid seal plate to the bottom of the pool, possesses liquid sealing capacity and minimizes bending moment. This ensures a one-to-one correspondence between the flushing pump force, suction pump force, liquid seal plate structure, and the distance from the bottom of the liquid seal plate to the bottom of the pool. After the calculations are completed, the flushing pump force is adjusted to the required force via remote control. Simultaneously, the remote control controls the servo motor to adjust the length of the connecting steel pipe and the liquid seal plate to achieve the required distance from the bottom of the liquid seal plate to the bottom of the pool. At the same time, the remote control controls the servo motor to adjust the liquid seal plate to deform it into the required liquid seal plate structure. These operations should be completed simultaneously. Depending on the bottom sediment conditions, a complete set of matching flushing pump force, suction pump force, connecting steel pipe length, shell and liquid seal plate inclination, number of grooves and groove depth of the liquid seal plate are adopted as needed.

[0013] When the mud pump fails to lift the bottom mud, the mud pump force needs to be increased. If the mud pump force is increased to a certain range and still cannot lift the bottom mud, the bottom mud at that location can be considered to have a certain degree of compaction. The mud pump force needs to be increased again. The degree of compaction of the bottom mud at that location can be observed by the mud pump force required to disperse the bottom mud at that location.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: The sludge removal device of the present invention adopts the design concept of flushing and drainage, which has the advantage of fast sludge discharge speed and is more suitable for the removal of bottom sludge. The present invention is designed with a shell and a liquid seal plate, which can prevent bottom sludge from spreading into the surrounding water. Different water pressures can be selected for flushing according to the degree of bottom sludge compaction in the detector. The deformable liquid seal plate can ensure that mud and water do not leak out when using various flushing pumps. The length of the liquid seal plate can be precisely adjusted by calculation so that the liquid seal plate does not generate excessive bending moment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the front view sectional structure of the mechanical main body of the present invention;

[0016] Figure 2 This is a side view sectional view of the mechanical main body of the present invention;

[0017] Figure 3 This is a top-view cross-sectional view of the mechanical main body of the present invention;

[0018] Figure 4 This is a three-dimensional perspective view of the mechanical main body of the present invention;

[0019] Figure 5 This is a flowchart illustrating the operation of the present invention;

[0020] Figure 6 This is a cross-sectional structural diagram of the liquid sealing device of the present invention;

[0021] Figure 7 This is a three-dimensional perspective view of the outer casing of the present invention.

[0022] Figure 8 This is a graph showing the experimental results of Experiment 1 of this invention;

[0023] Figure 9 This is a graph showing the experimental results of Experiment 2 of this invention;

[0024] In the diagram: 1. Outer shell; 2. Liquid seal plate; 3. Sludge pump; 4. Sludge suction pump; 5. Sludge pump pipe; 6. Sludge suction pipe; 7. Connecting steel pipe; 8. Truss; 9. Bottom of the pool; 91. Pool wall; 10-18. Signal receiver and servo motor mounting point of the liquid seal plate mechanical skeleton (assuming a servo motor is installed at this point, and the servo motor number is the same as the servo motor mounting point number); 20-21. Servo motor controlling the connection between the connecting steel pipe and the outer shell; 22-24. Surface of the outer shell; 25-28. Point on the outer shell connecting to servo motor 10 on the liquid seal plate; 201-208. Lower end point markings of the liquid seal plate mechanical skeleton. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] Please see Figure 1-7 This invention provides an embodiment of a bottom sediment removal device, including a detector, which can be an ultrasonic detector. At the beginning of the sediment removal process, the ultrasonic detector is used to detect the thickness of the bottom sediment across the entire pool. After imaging in an imager, the operator can select different pumping forces, pump suction forces, the number of grooves in the liquid seal plate, and the lengths of each segment of the liquid seal plate skeleton (e.g., 10-11, 11-201, 11-12) based on the sediment thickness at each location. If the sediment compaction at a certain location becomes too high, and the previously selected pumping force cannot remove the sediment, the pumping force and pump suction forces need to be increased. Corresponding to the pumping force to be used, the number of grooves in the liquid seal plate and the lengths of each segment of the liquid seal plate skeleton (e.g., 10-11, 11-201, 11-12) are adjusted according to the calculation results to control sediment diffusion. Simultaneously, the pumping force is adjusted to the desired value. The device includes a housing 1, such as... Figure 7The arrows in the diagram indicate the direction of device operation. The outer casing 1 has two planes, 22 and 24, positioned before and after the direction of device operation. A third plane, 23, is then placed on top, forming the outer casing 1. This results in three interconnected and perpendicular planes. The function of the outer casing 1 is to prevent dirty water inside from spreading into the clean water outside. The top of the outer casing 1 is equipped with servo motors 20 and 21, which are connected to the connecting steel pipe 7. These servo motors allow the outer casing 1 to rotate around them and also adjust the length of the connecting steel pipe 7. The connecting steel pipe 7 is connected to a truss 8, which has a fixed elevation. The truss 8 is connected to a motor on the shore, and the motor drives the truss 8 to operate on a horizontal plane. The device moves forward or backward, thus propelling the entire unit along the length of the pool. A through-hole is located at the top of the outer casing 1, through which the flushing pipe 5 and the sludge extraction pipe 6 extend into the casing 1. The flushing pipe 5 is inserted through a through-hole at the center of the top surface of the casing 1 and is connected to the flushing pump 3. The outlet of the flushing pipe 5 can swing inside the casing 1. The sludge extraction pipes 6 are inserted through four through-holes at the four corners of the top surface of the casing 1 and are connected to the sludge extraction pump 4, for a total of four pipes. The inlet of the flushing pipe 5 is below the water surface, directly using pool water to flush the bottom mud of the pool without generating additional water. The outlet of the sludge extraction pipe 6 extends upward and then bends to the outside of the pool. Both the flushing pump 3 and the sludge extraction pump 4 are variable frequency pumps, capable of... The pump's flushing and suction forces can be adjusted in real time via remote control or some other controller. Liquid seal plates 2 are connected to the bottom of surfaces 22 and 24 of the outer casing 1. One liquid seal plate 2 is installed at each end along the forward direction of the device. Each liquid seal plate 2 consists of a mechanical frame, a remote control, a signal receiver, and servo mechanisms. The servo mechanisms are the same width as the liquid seal plate. The four servo mechanisms 10 on the liquid seal plate 2 are connected to the servo mechanism connection points 25, 26, 27, and 28 on the outer casing 1, with proper leak-proof measures at the connection points. Under normal operating conditions, the liquid seal plate has multiple grooves, with the groove openings facing the bottom of the pool. In most cases, the liquid seal plate 2 and the outer casing 1 remain horizontal. The lower end of the liquid seal plate 2 is marked with points 201, 202, 203, 204, and 205. Points 05, 206, 207, and 208 should be kept on the same horizontal plane and at a certain distance from the bottom 9 of the pool. Surfaces I, II, III, IV, V, VI, and VII of the liquid seal plate 2 should also be kept on the same horizontal plane. However, depending on the actual situation, a remote control can be used to control the servo motors to prevent the lower markings 201, 202, 203, 204, 205, 206, 207, and 208 of the liquid seal plate 2 from being on the same horizontal plane, or to prevent surfaces I, II, III, IV, V, VI, and VII of the liquid seal plate 2 from being on the same horizontal plane. Even the outer casing 1 can be rotated by servo motors 20 and 21. In practical applications, the servo motor placement points and the number of servo motors on the liquid seal plate 2 are not fixed. Figure 6The quantities shown are the same, but can be increased or decreased according to actual needs, thereby increasing or decreasing the maximum number of deployable grooves in the liquid seal plate 2. The servo motor 10, controlled by a remote controller, allows the mechanical skeleton segments 10-11 of the liquid seal plate to rotate 360° around the servo motor 10 and can be controlled to extend or retract. Similarly, the servo motor 11, controlled by a remote controller, allows the mechanical skeleton segments 11-12 and 11-201 of the liquid seal plate to rotate 360° around the servo motor 11 and can be controlled to extend or retract. The system can be retracted or extended. By controlling servo motor 12 via remote control, segments 12-13 and 12-202 of the liquid seal plate mechanical skeleton can rotate 360° around servo motor 12, and segments 12-13 and 12-202 can be retracted or extended. Similarly, by controlling servo motor 13 via remote control, segments 13-14 and 13-203 of the liquid seal plate mechanical skeleton can rotate 360° around servo motor 13, and segments 13-14 and 13-203 can be retracted or extended. Furthermore, by controlling servo motor 14 via remote control, the system can retract or extend the liquid seal plate mechanical skeleton... Segments 14-15 and 14-204 can rotate 360° around servo motor 14, and can control the extension and retraction of liquid sealing plate mechanical skeleton segments 14-15 and 14-204. Servo motor 15, controlled by a remote controller, can drive liquid sealing plate mechanical skeleton segments 15-16 and 15-205 to rotate 360° around servo motor 15, and can also control the extension and retraction of liquid sealing plate mechanical skeleton segments 15-16 and 15-205. Servo motor 16, controlled by a remote controller, can drive liquid sealing plate mechanical skeleton segments 16-17 and 16-206 to rotate 360° around servo motor 16. The device can rotate 60° and control the extension and retraction of mechanical skeleton segments 16-17 and 16-206 of the liquid seal plate. The servo motor 17, controlled by the remote controller, can drive mechanical skeleton segments 17-18 and 17-207 to rotate 360° around the servo motor 17 and can also control the extension and retraction of mechanical skeleton segments 17-18 and 17-207. The servo motor 18, controlled by the remote controller, can drive mechanical skeleton segments 18-208 to rotate 360° around the servo motor 18 and can also control the extension and retraction of mechanical skeleton segments 18-208. Figure 1-4The example provided shows a single device installed in a water tank, flush against the tank wall 91. In practical applications, the device moves in the direction of the tank's length. The number of devices should be adjusted according to the actual width of the tank, arranged side-by-side, and flush against each other, with the devices at both ends flush against the tank wall 91. This ensures the parallel arrangement of devices fills the width of the tank, guaranteeing a closed interface formed by the bottom surface of the liquid seal plate 2, the tank bottom 9, and the tank wall 91, allowing for the calculation of the area ratio of each interface. The I, II, III, IV, V, VI, and VII surfaces of the liquid seal plate of the parallel arrangement must remain on the same plane; the liquid seal plate 2 cannot... The device directly contacts the bottom 9 of the pool because it is much smaller than the pool body. It is driven forward by a motor to continuously flush the entire bottom 9 of the pool, rather than remaining stationary. If it were in direct contact with the bottom 9, after flushing a certain area, the sediment from the next area would not be able to enter the flushing area within the outer casing 1. The thickness and degree of sediment compaction vary in different areas. During operation, the force of the variable frequency flushing pump 3 and the suction force of the variable frequency suction pump 4 must be adjusted using a remote control according to the sediment thickness and compaction level to ensure consistency between the suction force of the suction pump 4 and the flushing pump 3. Liquid seal plate 2 This is a device designed based on Bernoulli's equation and the local head loss formula. The liquid seal plate 2, together with the pool bottom 9 and the pool wall 91, form a series of closed interfaces with fixed areas. The areas of these interfaces undergo abrupt changes at certain points, i.e., sudden contraction or expansion. The local head loss formula requires the interface area between the two interfaces before and after a certain fluid point for calculation. Since these fluid interfaces are formed by the mechanical skeleton of the liquid seal plate at ends 201, 202, 203, 204, 205, 206, 207, 208, sections 11-12, 12-13, and 13-14... The area enclosed by segments 14-15, 15-16, 16-17, 17-18, the pool bottom 9, and the pool wall 91 is fixed and calculable. Therefore, the local head loss formula can be used to accurately calculate the specific local head loss at a certain point, thus making it possible to use Bernoulli's equation for accurate calculation. This ensures that the structure of the liquid seal plate 2 is based on data and calculation, enabling precise control of the bending moment of the device and the liquid seal performance of the liquid seal plate 2. Next, the calculation method for the structure of the liquid seal plate 2 is provided, such as... Figure 6 Assuming the amount of bottom mud is not excessive and there is no accumulation forming a slope, the lower end markers 201, 202, 203, 204, 205, 206, 207, and 208 of the liquid seal plate 2 can be kept on the same horizontal plane. Surfaces I, II, III, IV, V, VI, and VII of the liquid seal plate 2 should also be kept on the same horizontal plane. Since the outer shell 1 is tightly connected to the pool wall 91, it has a blocking effect on mud and water diffusion. Therefore, mud and water can only flow out from the interface between the liquid seal plate 2 and the pool bottom 9. Interface a is the initial interface, and the liquid flow velocity at interface a is V. The liquid flow velocity at interface b can be determined according to Bernoulli's equation. Formula for local head loss To calculate, since interface b is a rapidly expanding interface, ,in It is the area of ​​the interface perpendicular to the bottom 9 of the pool, formed by the 201 end of the liquid seal plate 2 on the left side of interface b, the bottom 9 of the pool, and the pool wall 91. It is the area of ​​the interface perpendicular to the bottom 9 of the pool formed by the I-side of the liquid seal plate 2 on the right side of interface b, the bottom 9 of the pool, and the pool wall 91. In the local head loss formula, V is taken as the liquid velocity from the 201 end of the liquid seal plate 2 on the left side of interface b to the bottom 9 of the pool. , That is, the liquid velocity V at the outlet interface a, due to the calculation , It refers to the two velocities of interface b on the same horizontal plane before and after, so equal, Therefore, when the ratio of the distance from marker point 201 to the bottom of the pool 9 to the distance from mechanical frame segments 11-12 to the bottom of the pool 9 (i.e., the distance from surface I to the bottom of the pool 9) is 1:3, ,Depend on and The liquid velocity at the outlet interface b was calculated. The flow velocity of the liquid exiting interface c can also be determined according to Bernoulli's equation. Formula for local head loss To calculate, since interface C is a rapidly shrinking interface, ,in It is the area of ​​the interface perpendicular to the bottom 9 of the pool, formed by the I-side of the liquid seal plate 2 on the left side of interface c, the bottom 9 of the pool, and the pool wall 91. It is the area of ​​the interface perpendicular to the bottom 9 of the pool formed by the 202 end of the liquid seal plate 2 on the right side of interface c, the bottom 9 of the pool, and the pool wall 91. In the local head loss formula, V is the liquid velocity at the interface from the 202 end of the liquid seal plate 2 on the right side of interface c to the bottom 9 of the pool. Due to the calculation , It refers to the two velocities of the interface before and after it on the same horizontal plane, so... equal, Since the ratio of the distance from marker point 201 to the bottom of the pool 9 to the distance from mechanical frame segment 11-12 to the bottom of the pool 9 (i.e., the distance from surface I to the bottom of the pool 9) is 1:3, therefore, when the ratio of the distance from marker point 202 to the bottom of the pool 9 to the distance from mechanical frame segment 11-12 to the bottom of the pool 9 (i.e., the distance from surface I to the bottom of the pool 9) is 1:3, ,Depend on and The liquid velocity at the outlet interface c was calculated. =Similarly, when the distances from each end of marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool are given by a ratio of 1:3 for surfaces I, II, III, IV, V, VI, and VII, the flow velocity values ​​on the right side of each interface shown in Table 1 can be obtained. When the distances from each end of marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool are given by a ratio of 1:4 for surfaces I, II, III, IV, V, VI, and VII, the flow velocity values ​​on the right side of each interface shown in Table 2 can be obtained. The mechanical skeleton of the liquid seal plate 2 uses a parent-driven child-driven original... The design is as follows: servo 11 is the parent of servo 12, and can rotate servo 12 by driving mechanical frame segments 11-12. It can also extend and retract mechanical frame segments 11-12, and rotate and extend mechanical frame segments 11-201. Servo 12 is the parent of servo 13, and so on. To reduce the number of grooves in the liquid seal plate 2, simply rotate mechanical frame segments 18-208 to the position of mechanical frame segments 17-18 using servo 18, and then rotate segments 18-208 and 17-18 to the position of 17-207 using servo 17. To reduce the length of the liquid seal plate, besides reducing the number of grooves, the length of mechanical frame segments 11-12 can also be reduced by adjusting the servo motors. The lengths of segments 12-13, 13-14, 14-15, 15-16, 16-17, and 17-18 are used to reduce the overall length of the liquid seal plate. (Reducing the length of segment 11-12 of the mechanical skeleton requires preventing it from becoming too short, which would result in a small ratio of segment 11-12 length to segment 11-201 length. This would prevent the use of the local head loss formula and Bernoulli's equation when calculating the liquid seal plate 2, hindering accurate calculations of its structure and reducing its performance. The same applies to segments 12-13, 13-14, 14-15, 15-16, 16-17, and 17-18.) To adjust the groove depth of the liquid seal plate 2, one can... The lengths of sections 11-201, 12-202, 13-203, 14-204, 15-205, 16-206, 17-207, and 18-208 of the mechanical frame can be adjusted using servo motors. To adjust the distance between the liquid seal plate 2 and the pool bottom 9, when the adjustment range is small, the lengths of sections 10-11, 11-12, 12-13, 13-14, 14-15, 15-16, 16-17, and 17-18 of the mechanical frame can be adjusted using servo motors, which is more energy-efficient. When the adjustment range is large, the length of the connecting steel pipe 7 can be adjusted using servo motors 20 and 21, which is more energy-intensive.When the length of the liquid seal plate 2 is too long, such as when the number of grooves in the liquid seal plate 2 is too large, the bending moment of the far end of the liquid seal plate 2 to the center of the outer shell 1 is easily caused by various external forces (such as water flow force). This will also lead to an excessive bending moment of the outer shell 1 to the truss 8, which is not conducive to the stability of the device underwater. Especially in water treatment plant pools with large depths, the length of the liquid seal plate 2 has a great influence on the bending moment of the outer shell 1 to the truss 8. In particular, when the length of the liquid seal plate 2 is too long, the bending moment at the far end is large, which is prone to sagging or even touching the ground. Therefore, the length of the liquid seal plate 2 should be shortened as much as possible. When removing the bottom mud of the pool bottom 9, it is necessary to first select the flushing force of the mud flushing pump 3 according to the condition of the bottom mud. The selected flushing force of the mud flushing pump 3 needs to be determined by Bernoulli's equation. Formula for local head loss Calculations are performed on the liquid seal plate 2. While ensuring the liquid sealing performance of the liquid seal plate 2, a scheme that minimizes the bending moment effect on the liquid seal plate 2 is selected. Then, when the flushing pump 3 reaches the selected flushing force, the liquid seal plate 2 simultaneously deforms according to the scheme, controlling the mud and water. For example, if the outlet flow velocity of the liquid seal plate is 0.015 m / s as acceptable, and the liquid flow velocity at the outlet interface a is 0.3 m / s, according to... Figure 6 Table 1 shows that when the distances from the ends of markers 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool are in a ratio of 1:3 for surfaces I, II, III, IV, V, VI, and VII, the outlet flow velocity needs to reach the 16th interface, i.e., interface p, to achieve a velocity less than 0.015 m / s. Therefore, 16 rapidly expanding and contracting interfaces are required. Figure 6Table 2 shows that when the distances from the ends of markers 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool are in a ratio of 1:4 for surfaces I, II, III, IV, V, VI, and VII, the outlet flow velocity only needs to reach the 12th interface (interface l) to achieve a velocity less than 0.015 m / s. Therefore, only 12 rapid contraction and expansion interfaces are needed to eliminate excess trenches, significantly shorten the length of the liquid seal plate, reduce the bending moment generated by the liquid seal plate, and increase the stability of the device. It is assumed that there is no sediment accumulation at the bottom. To create a slope, it can be assumed that the lower end markers 201, 202, 203, 204, 205, 206, 207, and 208 of the liquid seal plate 2 are kept on the same horizontal plane, and the I, II, III, IV, V, VI, and VII surfaces of the liquid seal plate 2 are kept on the same horizontal plane. When the detector detects that the thickness of the bottom mud in front of the pool bottom 9 has increased and is greater than the current distance between the liquid seal plate 2 and the pool bottom 9, in order to prevent the bottom mud above the liquid seal plate 2 from failing to enter the scouring range inside the outer shell 1, it is necessary to select in advance to move the mechanical frame of the liquid seal plate into sections 10-11, 11- The length of connecting steel pipe 7 in sections 12, 12-13, 13-14, 14-15, 15-16, 16-17, and 17-18 is changed by what value? Based on the future set length, this ensures that the bottom sediment in front can enter the flushing range of the outer shell 1 from the space between the liquid seal plate 2 and the bottom of the pool 9. According to the future set length, the distances from each of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 are: [Table showing distances from points I, II, III, IV, V, VI, and VII]. The ratio of the distance from the surface to the bottom of the pool 9 will also change, becoming larger. This will lead to a decrease in the liquid sealing performance of the liquid seal plate 2. If the flushing force of the sludge pump 3 remains unchanged, the liquid seal plate 2 will no longer meet the requirements. In this case, the liquid seal plate 2 needs to be recalculated. After the calculation is completed, the liquid seal plate 2 will be deformed according to the calculation results. During the calculation, it is necessary to ensure that the distance from each surface of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 is sufficient for the bottom sludge of the pool 9 to pass through, based on Bernoulli's equation. Formula for local head loss Calculations were performed to determine the distances from each surface of the new marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9. The ratio of the distances from each surface of marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 was then calculated. Furthermore, bending moments were fully considered during the calculations to arrive at a solution that effectively seals the liquid while minimizing bending moments. Then, the mechanical frame of the liquid seal plate 2 and the connecting steel pipe 7 were controlled by a remote controller to extend, retract, rotate, and deform according to the calculated plan (e.g., adjusting the length of each section of the mechanical frame via servo motors, and adjusting the length of the connecting steel pipe 7 via servo motors 20 and 21). This ensures that the thickened bottom mud can enter the outer shell 1. Within the scouring range, the liquid seal plate 2 can be precisely calculated and deformed to adapt to the changing distance requirements between the liquid seal plate 2 and the bottom of the pool 9, preventing mud and water diffusion. For example, if the mud thickness at a certain location on the bottom of the pool 9 is 10cm, a liquid seal plate outlet flow velocity of 0.015m / s is considered acceptable. When the liquid flow velocity at the outlet interface a is 0.3m / s, then markers 201, 202, 203, and 20... 4. The distance from each of the surfaces 205, 206, 207, and 208 to the bottom of the pool 9 is 10cm to ensure that the bottom mud can enter the flushing range inside the outer shell 1. When the distances from each of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 are: Surface I, Surface II, Surface III, Surface IV, Surface V, Surface VI, and Surface VII to the bottom of the pool 9 = 1:4, according to... Figure 6 Table 2 only requires the 12th interface, i.e., interface l, to meet the requirements. Therefore, for the bottom mud at this location, only 12 sudden contraction and expansion interfaces need to be set. However, if the thickness of the bottom mud increases to 15cm in the direction of device operation, it is necessary to first assume that the distance from each face of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 is 15cm to ensure that the bottom mud can enter the flushing range inside the outer shell 1. However, when this assumption is made, if the mechanical frame of the liquid seal plate does not deform, the distance from each face of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 is: the distance from each face of face I, II, III, IV, V, VI, and VII to the bottom of the pool 9 = (10+5):(40+5) = 1:3. Then, according to... Figure 6Table 1 shows that the original 12 rapidly contracting and expanding interfaces, under the new ratio, can only reduce the initial velocity from 0.3 m / s to 0.0252 m / s, which does not meet the requirement that the outlet velocity of liquid seal plate 2 must be 0.015 m / s. Therefore, when assuming that the distance from each of the marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom 9 of the pool is 15 cm, liquid seal plate 2 needs to be recalculated. The calculation method is still based on Bernoulli's equation. Formula for local head loss To perform the calculation, for example, adjust the distance from each of surfaces I, II, III, IV, V, VI, and VII to the bottom 9 of the pool to 60. Then, the distance from each end of marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom 9 of the pool is: Distance from each of surfaces I, II, III, IV, V, VI, and VII to the bottom 9 of the pool = (10+5):(40+5+15) = 1:4. That is, keep the distance from each end of marker points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom 9 of the pool at 15cm. Then, adjust the mechanical frame 11-2 of the liquid seal plate. Sections 01, 12-202, 13-203, 14-204, 15-205, 16-206, 17-207, and 18-208 have increased from 30cm to 45cm. At this point, the liquid seal plate 2 still only needs 12 abrupt contraction and expansion interfaces to ensure the outlet flow velocity meets requirements. When the sediment at the bottom of the pool 9 becomes more compacted, the previously set flushing pump 3's force is insufficient for removal, requiring an increase in the flushing pump 3's force. This will increase the outlet flow velocity of the flushing pipe 5. To accommodate the upcoming change in the flushing pump 3's force, it is necessary to first assume an increase in the flushing pump 3's force. Based on this assumption, Bernoulli's equation is then applied. Formula for local head loss The liquid seal plate 2 was recalculated, taking into full account the bending moment, to obtain a scheme that can effectively seal the liquid while minimizing the bending moment. Then, the servo motor was controlled by a remote control to drive the mechanical frame to extend, retract, rotate, and deform, such as increasing the groove depth, so that the liquid seal plate 2 could adapt to the changing force of the mud pump 3 and control the mud and water. For example, if the initial flow velocity at interface a increases from 0.3 m / s to 1 m / s, and the liquid flow velocity at interface a is 0.3 m / s, if the distances from the ends of marked points 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 are in the ratio of 1:4 for each of the surfaces I, II, III, IV, V, VI, and VII, then only the 12th interface, i.e., interface l, is needed to achieve the desired flow rate. Since the outlet velocity is less than 0.015 m / s, only 12 rapid contraction and expansion interfaces are needed. However, when the initial velocity at interface a becomes 1 m / s, if the distances from the ends of markers 201, 202, 203, 204, 205, 206, 207, and 208 to the bottom of the pool 9 are maintained at a ratio of 1:4 (for surfaces I, II, III, IV, V, VI, and VII), then the 16th interface, i.e., interface p, is required to achieve an outlet velocity less than 0.015 m / s. Therefore, 16 rapid contraction and expansion interfaces are needed, and the original 12 interfaces are insufficient. In this case, the mechanical frame of the liquid seal plate 2 can be adjusted again to reduce the size of markers 201, 202, and 203. The ratio of the distances from each end of 204, 205, 206, 207, and 208 to the bottom of the pool 9, and the distances from each of surfaces I, II, III, IV, V, VI, and VII to the bottom of the pool 9, is crucial to reducing the number of abrupt contraction and expansion interfaces required. This shortens the length of the liquid seal plate, reduces the bending moment generated by the liquid seal plate, and increases the stability of the device. If there is a significant accumulation of sediment and a certain slope, the outer casing 1 and the liquid seal plate 2 can be tilted instead of kept horizontal by the servo motors 20 and 21 and the servo motor of the liquid seal plate mechanical frame. Furthermore, the ends of the liquid seal plate 2 mechanical frame 201, 202, 203, 204, 205, 206, 207, and 208 may not necessarily be on the same plane. When the device reaches both ends of the pool, the extended liquid seal plate 2 may... This will block the device from moving forward, preventing the bottom mud at both ends of the pool from entering the flushing range inside the outer casing 1. At this point, the furthest frame segment can be gradually retracted using the servo motor, slowly reducing the length of the liquid seal plate. For example, the mechanical frame segments 18-208 can be rotated to the position of mechanical frame segment 17-18 using the servo motor 18, and then the mechanical frame segments 18-208 and 17-18 can be rotated to the position of 17-207 using the servo motor 17. While retracting, the liquid seal plate 2 is brought into contact with the pool wall at the end of the pool to prevent the bottom mud from leaking out from the gap between the liquid seal plate 2 and the pool wall at the end of the pool. This process is repeated, gradually retracting the liquid seal plate 2 as it approaches the end of the pool to prevent the bottom mud from leaking and spreading out along the space between the outer casing 1 and the bottom of the pool 9 after all the liquid seal plates 2 are retracted quickly at once.Following this pattern, the liquid seal plate is gradually retracted.

[0027] Flow velocity on the right side b Right side flow velocity c Right side flow velocity d Right side flow velocity e Right side flow velocity f Right-side flow velocity g Right side flow velocity h Right side flow velocity V 0.75V 0.65V 0.48V 0.42V 0.31V 0.27V 0.20V Flow velocity on the right side Flow velocity on the right side of j Flow velocity on the right side of k Flow velocity on the right side Flow velocity on the right side of m n Right side flow velocity o Right side flow velocity p Right side flow velocity 0.17V 0.13V 0.11V 0.084V 0.072V 0.054V 0.047V 0.035V

[0028] Table 1. Flow velocity values ​​on the right side of each interface formed by the liquid seal plate, the bottom of the pool, and the wall of the pool.

[0029] Flow velocity on the right side b Right side flow velocity c Right side flow velocity d Right side flow velocity e Right side flow velocity f Right-side flow velocity g Right side flow velocity h Right side flow velocity V 0.66V 0.56V 0.37V 0.32V 0.21V 0.18V 0.12V i Right side flow velocity Flow velocity on the right side of j Flow velocity on the right side of k Flow velocity on the right side Flow velocity on the right side of m n Right side flow velocity o Right side flow velocity p Right side flow velocity 0.10V 0.067V 0.057V 0.038V 0.032V 0.021V 0.018V 0.012V

[0030] Table 2. Flow velocity values ​​on the right side of each interface of the liquid seal plate formed by the liquid seal plate, the bottom of the pool, and the wall of the pool.

[0031] Please see Figure 8-9 Table 3-4 shows an experimental verification method provided by the present invention: an experimental method for removing bottom sediment using a device, including Experiment 1, an experiment on removing ordinary bottom sediment using the device; and Experiment 2, an experiment on removing compacted bottom sediment using the device.

[0032] In Experiment 1 above, the removal of ordinary bottom sediment by the apparatus includes the following steps:

[0033] 1) Dry the filter paper in an oven at 103-105℃ until constant weight, weigh and record the weight W1 of the filter paper;

[0034] 2) Take 148.18g of ordinary bottom mud and spread it evenly in the water tank. The bottom mud area is 20cm×20cm. Place the device in the water tank and add water to cover the device. Connect a 20W mud flushing pump 3 and a 20W mud suction pump 4 and insert the water pipe into the outer shell 1 of the device. Note that the water pumps are placed outside the outer shell 1, and only the water pipe is inserted into the outer shell 1. Connect the inlet end of the mud flushing pipe 5 connected to the mud flushing pump 3 to a clean water tank. The outlet end of the mud flushing pipe 5 is inserted into the outer shell 1 and is swung. Connect the outlet end of the mud suction pipe 6 connected to the mud suction pump 4 to an empty tank. The inlet end of the mud suction pipe 6 is inserted into the outer shell 1.

[0035] 3) Simultaneously turn on the power to the sludge flushing pump 3 and the sludge suction pump 4. Start timing from the time of turning on, and take 100ml of water sample from the sludge suction pipe 6 at 10s, 20s, 30s, 40s, 50s, 60s, 70s, 80s, 90s, and 100s respectively.

[0036] 4) Place 100ml of water sample in an Erlenmeyer flask for filtration, dry the filter paper in an oven at 103-105℃ until constant weight, weigh and record the weight of the filter paper W2;

[0037] 5) By The concentration of suspended matter inside shell 1 at each time point can be calculated, and the results are shown in Table 3 and... Figure 8As shown, the device removes ordinary bottom sludge, flushing the sludge in the area in about 40 seconds, rolling up the bottom sludge, and can then move on to the next area for flushing and drainage. The rolled-up bottom sludge does not need to be sucked out immediately; it can be sucked out as the device moves forward. Once flushing is complete, stop the device and pump out all the dirty water. The sludge in the device is pumped out in about 100 seconds. Due to limitations of the experimental equipment, the actual production device will be much larger than the experimental device, and the sludge cleaning area will also be much larger. However, the experimental equipment and sludge cleaning area are scaled down proportionally, so the sludge discharge time in actual production will be similar to that in this experiment. In actual production, after flushing the bottom of the pool, it is generally necessary to stay in place with the flushing pump 3 and the suction pump 4 running for about 1 minute to allow the mud and water mixture in the device to be drained.

[0038] In Experiment 2 above, the apparatus for removing compacted bottom mud includes the following steps:

[0039] 1) Dry the filter paper in an oven at 103-105℃ until constant weight, weigh and record the weight W1 of the filter paper;

[0040] 2) Weigh 159.63g of sludge from the horizontal sedimentation tank of Huainan No. 1 Waterworks, spread it evenly in a water tank with a bottom sludge area of ​​20cm×20cm, add water and wait for it to form a hard crust, then place the device in the water tank and add water to cover the device. Connect a 20W sludge flushing pump 3 and a 20W sludge suction pump 4 and insert the water pipes into the outer shell 1 of the device. Note that the pumps are placed outside the outer shell 1, and only the water pipes are inserted into the outer shell 1. Connect the inlet end of the sludge flushing pipe 5 connected to the sludge flushing pump 3 to a clean water tank, and extend the outlet end of the sludge flushing pipe 5 into the outer shell 1 and swing it. Connect the outlet end of the sludge suction pipe 6 connected to the sludge suction pump 4 to an empty tank, and extend the inlet end of the sludge suction pipe 6 into the outer shell 1.

[0041] 3) Simultaneously turn on the power to the sludge flushing pump 3 and the sludge suction pump 4. Start timing from the time of turning on, and take 100ml of water sample from the sludge suction pipe 6 at 10s, 20s, 30s, 40s, 50s, 60s, 70s, 80s, 90s, and 100s respectively.

[0042] 4) Place 100ml of water sample in an Erlenmeyer flask for filtration, dry the filter paper in an oven at 103-105℃ until constant weight, weigh and record the weight of the filter paper W2;

[0043] 5) By The concentration of suspended matter inside shell 1 at each time point can be calculated, and the results are shown in Table 4 and... Figure 9As shown, the device flushes away compacted bottom sludge. The device causes the compacted bottom sludge to break down and fill the entire shell, so the suspended solids concentration is initially the highest, then gradually decreases. After 50 seconds, the compacted bottom sludge in this area is basically flushed away, and the device can move to the next area for sludge removal. The sludge that is rolled up remains inside the device and does not need to be immediately sucked out; it can be sucked out as the device continues to move forward. Once flushing is complete, the device is stopped, and all the dirty water inside is pumped out. The sludge inside the device is pumped out in approximately 100 seconds. Due to limitations of the experimental equipment, the actual production device will be much larger than the experimental device, and the sludge cleaning area will also be much larger. While the experimental setup and cleaning area are scaled down proportionally, the actual sludge removal time in production will be similar. In actual production, after the bottom sludge is rolled up, the device should remain in place with the flushing pump 3 and suction pump 4 running for about 50 seconds to allow the mud-water mixture inside the device to be completely drained. This experiment demonstrates that the device has a good ability to remove bottom sludge, can quickly and effectively remove bottom sludge, and can remove compacted bottom sludge. The sludge removal speed for compacted bottom sludge is similar to that for ordinary bottom sludge, reflecting the device's good ability to remove compacted bottom sludge.

[0044] Time / s Filter paper weight W1 / g The weight of the filter paper after filtration and drying is W2 / g. Sludge density [(W2-W1) / V] / (g / L) 10 1.0253 1.1985 1.732 20 1.0308 1.177 1.462 30 1.0346 1.162 1.274 40 1.0312 1.898 8.668 50 1.0271 1.1725 1.454 60 1.0240 1.04 0.16 70 1.2508 1.3276 0.768 80 1.0325 1.0713 0.388 90 1.0274 1.0365 0.091 100 1.0276 1.0276 0

[0045] Table 3. Experimental Results Data for Experiment 1

[0046] Time / s Filter paper weight W1 / g The weight of the filter paper after filtration and drying is W2 / g. Sludge density [(W2-W1) / V] / (g / L) 10 0.9933 1.47 4.767 20 0.9657 1.0648 0.991 30 0.9636 1.0927 1.291 40 0.9774 1.0165 0.391 50 0.972 1.0809 1.089 60 0.9736 1.0291 0.555 70 0.9688 1.0133 0.445 80 1.036 1.0641 0.281 90 1.0385 1.0863 0.478 100 1.037 1.0625 0.255

[0047] Table 4. Experimental Results Data for Experiment 2

[0048] 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 implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A pool bottom sludge removal device, comprising a probe, a probe signal receiver, an imager, a variable frequency pump remote controller, a variable frequency pump signal receiver, a variable frequency mud flushing pump (3), a variable frequency mud suction pump (4), a mud flushing pipe (5), a mud suction pipe (6), a housing (1), a liquid seal plate (2), a rudder remote controller, a liquid seal plate rudder signal receiver, a liquid seal plate rudder, a liquid seal plate mechanical skeleton, a housing rudder signal receiver, a rudder 20 controlling the connection between the steel pipe and the housing, a rudder 21 controlling the connection between the steel pipe and the housing, a connecting steel pipe (7), a truss (8), a pool bottom (9), a pool wall (91), characterized in that: The variable frequency mud flushing pump (3) is connected with the mud flushing pipe (5), the variable frequency mud suction pump (4) is connected with the mud suction pipe (6), the inlet of the mud flushing pipe (5) is lower than the water surface of the pool, the outlet is in the shell (1), the inlet of the mud suction pipe (6) is in the shell (1), the outlet is outside the pool, the variable frequency mud flushing pump (3) and the variable frequency mud suction pump (4) are opened and closed at the same time, the thrust of the variable frequency mud flushing pump (3) and the suction force of the variable frequency mud suction pump (4) are kept equal at any moment, the shell (1) is connected with the liquid seal plate (2), the liquid seal plate (2) is composed of a rudder and a mechanical skeleton, the liquid seal plate (2) has a plurality of grooves, and the groove opening is towards the pool bottom (9), the liquid seal plate (2) realizes structural deformation through the rudder, the liquid seal plate rudder can freely adjust the length of each section of the liquid seal plate mechanical skeleton, the angle of each section of the liquid seal plate mechanical skeleton rotating around the liquid seal plate rudder, the number of grooves of the liquid seal plate (2) and the depth of the grooves of the liquid seal plate (2), the equipment first detects the bottom mud distribution through the detector, then according to the distribution and the bottom mud hardening degree, selects the thrust of the variable frequency mud flushing pump (3) and the suction force of the variable frequency mud suction pump (4) to be used, selects the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) to be used to ensure that the bottom mud can enter the flushing range in the shell (1) according to the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) to be used, and then the Bernoulli equation And the local water head loss formula The corresponding structure of the required liquid seal plate (2) and the corresponding values of the structure are calculated, including the length of each section of the liquid seal plate mechanical skeleton, the angle of each section of the liquid seal plate mechanical skeleton rotating around the liquid seal plate rudder, the number of grooves of the liquid seal plate (2) and the depth of the grooves of the liquid seal plate (2), the calculation process considers the influence of the bending moment generated by the liquid seal plate (2), selects the liquid seal plate (2) structure which has the liquid sealing effect for the thrust of the variable frequency mud flushing pump (3) and the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) to be used and generates the smallest bending moment, then the rudder connecting the steel pipe and the shell, the rudder of the liquid seal plate mechanical skeleton adjusts the length of each section of the liquid seal plate mechanical skeleton, the angle of each section of the liquid seal plate mechanical skeleton rotating around the liquid seal plate rudder, the number of grooves of the liquid seal plate (2) and the depth of the grooves of the liquid seal plate (2), the length of the connecting steel pipe (7), the thrust of the variable frequency mud flushing pump (3) is adjusted through the variable frequency pump remote control to reach the thrust to be used, at the same time, the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) is adjusted through the rudder remote control to also reach the distance to be used, the liquid seal plate (2) also completes the structural deformation according to the calculation result, the thickness and hardening degree of the pool mud change, then the above adjustment process is repeated to remove the bottom mud by the bottom mud removal equipment.

2. A device for the removal of pond sludge according to claim 1, characterised in that: The shell (1) is provided with a plane in front of and behind the device running direction, i.e. the shell face 22 and the shell face 24, and then a shell face 23 is provided on the top to form a total of three mutually connected and perpendicular planes, the top of the shell (1) is provided with a rudder 20 for controlling the connection of the steel pipe and the shell, a rudder 21 for controlling the connection of the steel pipe and the shell, the rudder 20 for controlling the connection of the steel pipe and the shell, the rudder 21 for controlling the connection of the steel pipe and the shell are connected with the connecting steel pipe (7), the rudder 20 for controlling the connection of the steel pipe and the shell, the rudder 21 for controlling the connection of the steel pipe and the shell can make the shell (1) rotate around the rudder 20 for controlling the connection of the steel pipe and the shell, the rudder 21 for controlling the connection of the steel pipe and the shell, and can also adjust the length of the connecting steel pipe (7), the connecting steel pipe (7) is connected with the truss (8), the truss (8) is fixed in elevation, the truss (8) is connected with the motor on the shore, the motor drives the truss (8) to advance or retreat in a horizontal plane, thereby driving the whole device to advance or retreat along the long direction of the pool, the top of the shell (1) is provided with a through hole, the mud flushing pipe (5) and the mud suction pipe (6) extend into the shell (1) from the through hole in the top of the shell (1), the inlet of the mud flushing pipe (5) is lower than the water surface of the pool, and the outlet is in the shell (1), the mud flushing pipe (5) is powered by the variable frequency mud flushing pump (3), water in the pool is sucked from the inlet of the mud flushing pipe (5), the outlet of the mud flushing pipe (5) is swung in the shell (1), and the water in the mud flushing pipe (5) is powered by the variable frequency mud flushing pump (3) to be flushed out of the outlet of the mud flushing pipe (5) to impact the bottom mud in the shell (1), the inlet of the mud suction pipe (6) is in the shell (1), and the outlet is outside the pool, the mud suction pipe (6) is powered by the variable frequency mud suction pump (4) to suck water in the shell (1) from the inlet of the mud suction pipe (6), the water in the mud suction pipe (6) is powered by the variable frequency mud suction pump (4) to flow out of the outlet of the mud suction pipe (6) outside the pool, the variable frequency mud flushing pump (3) and the variable frequency mud suction pump (4) are opened and closed at the same time, the liquid seal plate (2) has a plurality of grooves, and the groove openings are directed towards the pool bottom (9), the bottom end of the liquid seal plate (2) is not in contact with the pool bottom (9), the liquid seal plate (2) is provided with one in each of the two directions of the equipment advancing direction, and the four liquid seal plate mechanical skeleton rudders 10 on the liquid seal plate (2) are connected with the rudder connection points 25, 26, 27 and 28 on the shell (1) in correspondence, and good water leakage prevention measures are taken at the connection, the liquid seal plate (2) is composed of rudders and mechanical skeletons, the rudder 10 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 10-11 to rotate 360° around the rudder 10 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 10-11 to stretch and transform, the rudder 11 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 11-12 and 11-201 to rotate 360° around the rudder 11 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 11-12 and 11-201 to stretch and transform,The steering wheel 12 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 12 to 13, 12 to 202 to rotate 360° around the steering wheel 12 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 12 to 13, 12 to 202 to stretch and transform. The steering wheel 13 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 13 to 14, 13 to 203 to rotate 360° around the steering wheel 13 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 13 to 14, 13 to 203 to stretch and transform. The steering wheel 14 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 14 to 15, 14 to 204 to rotate 360° around the steering wheel 14 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 14 to 15, 14 to 204 to stretch and transform. The steering wheel 15 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 15 to 16, 15 to 205 to rotate 360° around the steering wheel 15 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 15 to 16, 15 to 205 to stretch and transform. The steering wheel 16 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 16 to 17, 16 to 206 to rotate 360° around the steering wheel 16 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 16 to 17, 16 to 206 to stretch and transform. The steering wheel 17 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 17 to 18, 17 to 207 to rotate 360° around the steering wheel 17 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 17 to 18, 17 to 207 to stretch and transform. The steering wheel 18 of the liquid seal plate mechanical skeleton on the liquid seal plate (2) can drive the mechanical skeleton segments 18 to 208 to rotate 360° around the steering wheel 18 of the liquid seal plate mechanical skeleton and control the mechanical skeleton segments 18 to 208 to stretch and transform. These stretching and rotating transformations can make the liquid seal plate (2) have different groove numbers and groove depths and can make the liquid seal plate (2) tilt. After the bottom mud detector detects, the signal is converted into an image by the signal receiver, imaged in the imaging instrument, and the thickness of the bottom mud of each part of the pool bottom (9) is displayed. Then, according to different bottom mud conditions, the variable frequency mud flushing pump (3) force, the variable frequency mud suction pump (4) suction force, the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) are selected to be used. The distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) should be able to ensure that the bottom mud can enter the flushing range in the shell (1). Then, according to these variable frequency mud flushing pump (3) force, variable frequency mud suction pump (4) suction force, and distance from the bottom end of the liquid seal plate (2) to the pool bottom (9), the Bernoulli equation, and the local water head loss formula The number and depth of the grooves of the liquid seal plate (2) are calculated, and then a signal is sent through the rudder remote controller. After the signal is received by the liquid seal plate rudder signal receiver, the liquid seal plate rudder is controlled to adjust the number and depth of the grooves of the liquid seal plate (2) to the required values. At the same time, a signal is sent through the variable frequency pump remote controller. After the signal is received by the variable frequency pump signal receiver, the variable frequency mud flushing pump (3) and the variable frequency suction pump (4) are controlled to adjust the flushing force and suction force to the values to be used. At the same time, a signal is sent through the rudder remote controller. After the signal is received by the shell rudder signal receiver and the liquid seal plate rudder signal receiver, the rudders that control the connection of the steel pipe with the shell and the mechanical framework of the liquid seal plate are controlled to adjust the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) to the distance to be used. The distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) is adjusted to the distance to be used, and the bottom mud forms a certain slope. Through remote control by the rudder remote controller, the shell rudder signal receiver receives the signal, and the rudders that control the connection of the steel pipe with the shell (20) and the rudders that control the connection of the steel pipe with the shell (21) are controlled to rotate the shell (1) around the rudders that control the connection of the steel pipe with the shell (20) and the rudders that control the connection of the steel pipe with the shell (21) to form a certain angle. Then, the inclination of the liquid seal plate (2) is adjusted by the rudders of the mechanical framework of the liquid seal plate. The selection of the number and depth of the grooves of the liquid seal plate (2) needs to be based on the flushing force of the variable frequency mud flushing pump (3), the suction force of the variable frequency suction pump (4), and the distance from the bottom end of the liquid seal plate (2) to the pool bottom (9) at that moment in order to remove the bottom mud and to make the bottom mud at that place enter the flushing range in the shell (1). When selecting, the area of the interface surrounded by the liquid seal plate (2), the pool wall (91), and the pool bottom (9) is changed, and the Bernoulli equation and the local water head loss formula The distance from the lower end point mark point 201 of the mechanical skeleton of the liquid seal plate to the pool bottom (9) can be determined: the distance from the segment 11 to 12 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 11 to 12 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 202 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 202 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 12 to 13 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 12 to 13 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 203 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 203 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 13 to 14 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 13 to 14 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 204 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 204 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 14 to 15 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 14 to 15 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 205 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 205 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 15 to 16 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 15 to 16 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 206 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 206 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 16 to 17 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 16 to 17 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 207 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 207 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 17 to 18 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the segment 17 to 18 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), the distance from the lower end point mark point 208 of the mechanical skeleton of the liquid seal plate to the pool bottom (9), when these ratios take different values, the corresponding flow rate values after the change of the fluid after the sudden contraction and sudden expansion are completed, the impact of different variable frequency mud pumps (3) and the distance of the liquid seal plate (2) to the pool bottom (9) should be different. In order to control the flow rate of the fluid flowing out of the liquid seal plate (2) within a certain range, different groove numbers and different ratios need to be selected. When selecting, the ratio that makes the groove number of the liquid seal plate (2) as small as possible under the premise of ensuring the liquid sealing effect is selected to reduce the influence of the bending moment generated by the liquid seal plate (2),Then, based on the selected ratios, the length of each segment of the liquid seal plate mechanical skeleton, the rotation angle of each segment of the liquid seal plate mechanical skeleton around the liquid seal plate servo, the number of grooves of the liquid seal plate (2), and the groove depth of the liquid seal plate (2) are adjusted by the servo of the liquid seal plate mechanical skeleton. When the thickness of the bottom mud changes in front of the operation, it is necessary to change the distance from the bottom of the liquid seal plate (2) to the bottom of the pool (9) to ensure that the bottom mud can enter the flushing range inside the shell (1). After selecting the distance from the bottom of the liquid seal plate (2) to the bottom of the pool (9), according to the selected distance from the bottom of the liquid seal plate (2) to the bottom of the pool (9), the structure of the liquid seal plate (2) remains unchanged. The distance from the bottom endpoint mark 201 of the liquid seal plate mechanical skeleton to the bottom of the pool (9) is: liquid seal plate mechanical skeleton segment 1 Distance from segments 1 to 12 to the bottom of the pool (9); distance from segments 11 to 12 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from the lower end point marker 202 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from the lower end point marker 202 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from segments 12 to 13 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from segments 12 to 13 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from the lower end point marker 203 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from the lower end point marker 203 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); distance from segments 13 to 14 ... Distance from segment 14 to the bottom of the pool (9): Distance from the lower end point marker 204 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); Distance from the lower end point marker 204 of the liquid seal plate mechanical skeleton to the bottom of the pool (9): Distance from segments 14 to 15 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); Distance from segments 14 to 15 of the liquid seal plate mechanical skeleton to the bottom of the pool (9): Distance from the lower end point marker 205 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); Distance from the lower end point marker 205 of the liquid seal plate mechanical skeleton to the bottom of the pool (9): Distance from segments 15 to 16 of the liquid seal plate mechanical skeleton to the bottom of the pool (9); Distance from segments 15 to 16 of the liquid seal plate mechanical skeleton to the bottom of the pool (9): Distance from the lower end point of the liquid seal plate mechanical skeleton The following ratios will change: the distance from marker 206 to the bottom of the pool (9); the distance from marker 206 at the lower end of the liquid seal plate mechanical skeleton to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton segments 16 to 17 to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton segments 16 to 17 to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton lower end marker 207 to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton lower end marker 207 to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton segments 17 to 18 to the bottom of the pool (9); the distance from liquid seal plate mechanical skeleton segments 17 to 18 to the bottom of the pool (9); and the distance from liquid seal plate mechanical skeleton lower end marker 208 to the bottom of the pool (9).The liquid sealing plate (2) liquid sealing performance changes, in order to cope with the change of the distance from the bottom end of the liquid sealing plate (2) to the pool bottom (9), the required liquid sealing plate (2) structure is calculated according to the distance from the bottom end of the liquid sealing plate (2) to the pool bottom (9) by Bernoulli equation, And local water head loss formula The ratio is selected as the appropriate ratio, and then the length of each section of the liquid sealing plate mechanical skeleton, the angle of rotation of each section of the liquid sealing plate mechanical skeleton around the liquid sealing plate rudder, the number of grooves of the liquid sealing plate (2), and the depth of the grooves of the liquid sealing plate (2) are adjusted by the rudder of the liquid sealing plate mechanical skeleton, so that the liquid sealing plate (2) is changed to the appropriate structure according to the calculation result. When the device runs to a position where the bottom mud is hard, the previously selected pump force cannot remove the bottom mud, and the pump force and pump suction force need to be increased. The required variable frequency mud pump (3) force and variable frequency suction pump (4) suction force are selected, and then the required variable frequency mud pump (3) force and variable frequency suction pump (4) suction force are calculated according to Bernoulli equation And local water head loss formula After calculation, the optimal liquid sealing plate structure scheme is selected, and then the liquid sealing plate groove number and the length of each section of the liquid sealing plate mechanical skeleton are adjusted by the rudder of the liquid sealing plate according to the scheme through the remote control. At the same time, the variable frequency pump remote control sends a signal, and the variable frequency pump signal receiver receives the signal to control the variable frequency mud pump (3) force and the variable frequency suction pump (4) suction force to be adjusted to the variable frequency mud pump (3) force and the variable frequency suction pump (4) suction force to be used. The rudder of the liquid sealing plate mechanical skeleton adjusts the length of the liquid sealing plate (2) mechanical skeleton section 11-12, the liquid sealing plate (2) mechanical skeleton section 12-13, the liquid sealing plate (2) mechanical skeleton section 13-14, the liquid sealing plate (2) mechanical skeleton section 14-15, the liquid sealing plate (2) mechanical skeleton section 15-16, the liquid sealing plate (2) mechanical skeleton section 16-17, and the liquid sealing plate (2) mechanical skeleton section 17-18 during the operation of the device, to prevent the length of the liquid sealing plate (2) mechanical skeleton section 11-12, the liquid sealing plate (2) mechanical skeleton section 12-13, the liquid sealing plate (2) mechanical skeleton section 13-14, the liquid sealing plate (2) mechanical skeleton section 14-15, the liquid sealing plate (2) mechanical skeleton section 15-16, the liquid sealing plate (2) mechanical skeleton section 16-17, and the liquid sealing plate (2) mechanical skeleton section 17-18 from being too short to use Bernoulli equation And local water head loss formula Carry on the calculation, the device runs to the pool both ends, the liquid seal board (2) that stretches out will block the device to continue to advance, cause the bottom mud of the pool both ends to be unable to enter the flushing range in the shell (1), at this time the steering wheel 18 of the liquid seal board mechanical skeleton will rotate the mechanical skeleton 18-208 section to the mechanical skeleton 17-18 section position, then again through the steering wheel 17 of the liquid seal board mechanical skeleton, the mechanical skeleton 18-208 section and the mechanical skeleton 17-18 section are rotated to the mechanical skeleton 17-207 section position, and the pool wall of the pool end is contacted gradually by retraction, according to this mode, the liquid seal board is gradually retracted.

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