A convenient desilting device for municipal sewage well and construction method

Abstract

The present invention discloses a convenient desilting device for a municipal sewage well and a construction method, comprising a ground, wherein a sewage well body is buried inside the ground, a keel frame is arranged on the right side of the top of the ground, and movable wheel groups are fixedly installed at the four corners of the bottom of the keel frame, a conveying mechanism is arranged at the bottom of the inner side of the keel frame, and a limiting mechanism is arranged at the top of the inner side of the keel frame. The present invention drives a cleaning drill bit to rotate by a motor to clean out the silt in the sewage well body, replacing traditional manual cleaning with high speed and high efficiency, and can also convey the cleaned silt to a gathering point to avoid accumulation around the sewage well body and falling back into the sewage well body, and the present invention focuses on replacing traditional manual cleaning and conveying the cleaned silt, and the above two functions are integrated on one device to realize synchronous use, which is conducive to popularization and use.

Description

Technical Field

[0001] The invention relates to the technical field of sewage well desilting, and in particular to a convenient desilting device for a municipal sewage well and a construction method. Background Art

[0002] Sewage well is a kind of plastic inspection well, which is generally located at the intersection of drainage pipes, turning points, places where pipe diameter or slope changes, waterfalls and at certain intervals on straight pipe sections. It is a drainage auxiliary structure that is convenient for regular inspection, cleaning and unblocking of pipes. The key well seat part is made of one-time injection molding, and accessories such as reducers, variable angle joints and sealing rings are used to achieve the connection of changing pipe diameters and angles. Injection-molded manhole covers, well shafts and well seats are developed to match the sewage well. The road load acts on the inspection well through the manhole cover and well seat, avoiding the damage of the road load to the inspection well. The cover seat has the function of floating up and down, which can actively adapt to the height changes of the road surface. At the same time, the well shaft adopts single (double) wall corrugated pipes and adjustable well shafts, which can cut the corresponding length according to the on-site burial depth, and has great flexibility. The connection between the well shaft, the inlet (outlet) water pipe and the well seat adopts a flexible connection with a rubber sealing ring, which can adapt to angle changes within a small range. The construction is convenient and quick, the sealing performance is good, the leakage is effectively prevented, and it is environmentally friendly and energy-saving.

[0003] In the discharge of urban sewage, sewage pipes will discharge a variety of domestic garbage, as well as sludge washed down by rainy weather. These garbage sludge will cause blockage in the sewage wells during long-term discharge, affecting the urban drainage system, and thus the sewage wells need to be cleaned regularly and irregularly. However, the traditional cleaning method has the following defects:

[0004] 1. The traditional cleaning method is generally manual cleaning, which is slow, labor-intensive, and shallow, making it difficult to achieve deep cleaning.

[0005] Second, even if there is equipment for cleaning sludge, the cleaning end is difficult to adjust and replace according to the diameter of the sewage well, which is not conducive to use. Moreover, the cleaned sludge will accumulate around the equipment. There is no transmission device, causing the sludge to fall back into the sewage well, affecting the cleaning progress. Summary of the invention

[0006] The purpose of the present invention is to provide a convenient silt removal device and construction method for municipal sewage wells, which has the advantage of integrating the two functions of replacing traditional manual cleaning and transmitting the cleaned sludge into one device, and solves the problem that the traditional cleaning method is generally manual cleaning, which is slow, labor-intensive, and shallow in cleaning depth, making it difficult to achieve deep cleaning. Even if there is sludge cleaning equipment, the cleaning end thereon is difficult to adjust and replace according to the diameter of the sewage well, which is not conducive to use. Moreover, the cleaned sludge will accumulate around the equipment, and there is no transmission device, causing the sludge to fall back into the sewage well, affecting the cleaning progress.

[0007] To achieve the above-mentioned objectives, the present invention provides the following technical solutions: a municipal sewage well convenient dredging device, comprising a ground, a sewage well body is buried inside the ground, a keel frame is arranged on the right side of the top of the ground, and movable wheel groups are fixedly installed at the four corners of the bottom of the keel frame, a conveying mechanism is arranged at the bottom of the inner side of the keel frame, a limiting mechanism 1 is arranged at the top of the inner side of the keel frame, an adjustment mechanism is arranged on the front side of the keel frame, a limiting mechanism 2 is arranged at the left end of the bottom of the front side of the keel frame, a mounting plate compatible with the limiting mechanism 1 is arranged at the top of the inner side of the keel frame, a motor 1 is fixedly installed at the left end of the top of the mounting plate, the output shaft of the motor 1 passes through the bottom of the mounting plate and is fixedly installed with a replacement mechanism, a cleaning drill bit is arranged at the bottom of the replacement mechanism, and the bottom end of the cleaning drill bit extends into the interior of the sewage well body.

[0008] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided that: the sewage well body includes a transverse pipe buried transversely in the ground, the front and rear sides of the transverse pipe are connected to connecting auxiliary pipes, and the top of the transverse pipe is connected to a vertical pipe compatible with a cleaning drill bit.

[0009] The convenient desilting device for municipal sewage wells of the present invention as described above is further characterized in that: the conveying mechanism includes a driving frame sliding at the bottom of the inner cavity of the keel frame, the inner cavity of the driving frame is movably connected with a conveyor belt, and moving wheels are fixedly installed at the four corners of the bottom of the driving frame.

[0010] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided with: the limiting mechanism 1 includes a motor 2 fixedly mounted on the front side of the keel frame, the output end of the motor 2 passes through the inner cavity of the keel frame and is fixedly connected to a bevel gear 1, a threaded rod is penetrated on one side of the inner cavity of the keel frame, the bottom end of the threaded rod is fixedly connected to a bevel gear 2 matched with the bevel gear 1, and the right side of the mounting plate is threadedly connected to the surface of the threaded rod.

[0011] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided that: the adjusting mechanism includes a sliding pin welded to the front and rear sides of the mounting plate and an oblong hole opened at the top of the front and rear sides of the keel frame, the end of the sliding pin away from the mounting plate extends into the inner cavity of the oblong hole and slides in the inner cavity of the oblong hole, and the surface of the sliding pin is threadedly connected to a locking nut located on the outside of the keel frame.

[0012] The present invention is a convenient desilting device for municipal sewage wells as described above, further: the second limiting mechanism includes two sliding pins welded to the front and rear sides of the transmission mechanism and two oblong holes opened at the bottom of the front and rear sides of the keel frame, the end of the second sliding pin away from the transmission mechanism extends into the inner cavity of the second oblong hole and slides in the inner cavity of the second oblong hole, and the surface of the second sliding pin is threadedly connected to a locking nut two located on the outside of the keel frame.

[0013] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided with: the replacement mechanism includes a sleeve block, a threaded mounting hole is provided on the top of the sleeve block, and the sleeve block is threadedly connected to the output shaft of motor 1 through the threaded mounting hole.

[0014] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided with: the cleaning drill bit comprises a top plate, a rotating rod is welded to the bottom of the top plate, and a spiral convex ring distributed in a spiral is arranged on the surface of the rotating rod.

[0015] The convenient desilting device for municipal sewage wells of the present invention as described above is further provided with: a fixing block is welded on the top of the top plate, mounting rods are rotatably connected on both sides of the fixing block, mounting sleeves are welded on both sides of the sleeve block, mounting bolts are penetrated through the top and bottom of the front and rear sides of the mounting sleeve, and the mounting rod is flipped into the inner cavity of the mounting sleeve and fixedly installed in the inner cavity of the mounting sleeve by the mounting bolts.

[0016] A construction method for a convenient desilting device for a municipal sewage well, the construction steps are as follows:

[0017] 1. First, push the keel frame and move it to the vicinity of the sewage well body that needs to be desilted, and then install a suitable cleaning drill bit according to the diameter of the vertical pipe on the sewage well body;

[0018] 2. When installing the cleaning drill bit, the user restricts the cleaning drill bit to the position directly below the replacement mechanism, then flips the installation rod upward and flips the installation rod into the inner cavity of the installation sleeve, then inserts the installation bolt, and the user uses the installation bolt to fix the installation rod in the installation sleeve to complete the installation of the cleaning drill bit, and then loosens the locking nut 1, and starts the motor 2 to drive the bevel gear 1 to rotate, the bevel gear 1 drives the bevel gear 2 to rotate, the bevel gear 2 drives the threaded rod to rotate, the threaded rod drives the mounting plate to move downward and makes the drill bit extend from the vertical pipe into the inner cavity of the sewage well body, when the entire rotating rod is completely immersed in the sewage well body, tighten the locking nut 1, and the user starts the motor 1, the motor 1 will drive the entire cleaning drill bit to rotate through the replacement mechanism, and under the action of the spiral convex ring, the sludge in the sewage well body is brought out to the outside in a spiral manner, and it will fall onto the conveyor belt for transportation;

[0019] 3. Before the sludge is sent to the conveyor belt, the user starts the conveying mechanism to put the conveyor belt in a conveying state. When the sludge is sent to the conveyor belt, it will be sent to the gathering place for unified treatment;

[0020] 4. Before working in step 3, the user can adjust the distance between the conveying mechanism and the cleaning drill bit according to the distance between the conveying mechanism and the cleaning drill bit. When adjusting, the user loosens the locking nut 2, and then pushes the conveying mechanism to move in the direction of the cleaning drill bit until it is suitable, and tightens the locking nut 2, so that the cleaned sludge can be smoothly sent to the conveyor belt;

[0021] 5. After the dredging is completed according to steps 1 to 4, the user loosens the locking nut 1 again, starts the motor 2 to move the cleaning drill bit upward out of the inner cavity of the sewage well body, completes the folding work, and moves the entire dredging device aside;

[0022] 6. The user then rinses the surface of the cleaning drill bit to remove the sludge remaining on the surface to ensure that the cleaning drill bit is clean for the next use.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. The present invention drives the cleaning drill bit to rotate through a motor to clean out the sludge in the sewage well body, replacing the traditional manual cleaning, with fast speed and high efficiency, and can also transfer the cleaned sludge to the gathering point to avoid accumulation around the sewage well body and falling back into the sewage well body. The focus of the present invention is to replace the traditional manual cleaning and transfer the cleaned sludge. The above two functions are integrated into one device to achieve synchronous use, which is conducive to promotion and use. The municipal sewage well convenient dredging device and construction method have the advantages of integrating the two functions of replacing the traditional manual cleaning and transferring the cleaned sludge into one device, solving the problem that the traditional cleaning method is generally manual cleaning, which is slow, labor-intensive, and shallow in cleaning depth, making it difficult to achieve deep cleaning. Even if there is equipment for sludge cleaning, the cleaning end thereon is difficult to adjust and replace according to the caliber of the sewage well, which is not conducive to use. Moreover, the cleaned sludge will accumulate around the equipment, and there is no transmission device, causing the sludge to fall back into the sewage well, affecting the cleaning progress. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the structure of the present invention;

[0026] Figure 2 This is a three-dimensional diagram of the sewage well body of the present invention;

[0027] Figure 3 A three-dimensional diagram of a cleaning drill bit of the present invention;

[0028] Figure 4 A three-dimensional diagram of the replacement mechanism of the present invention;

[0029] Figure 5 It is a three-dimensional diagram of the limiting mechanism of the present invention;

[0030] Figure 6 It is a three-dimensional diagram of the transmission mechanism of the present invention.

[0031] In the figure: 1. ground; 2. sewage well body; 3. mounting bolts; 4. keel frame; 5. moving wheel group; 6. transmission mechanism; 7. limit mechanism 1; 8. adjustment mechanism; 9. limit mechanism 2; 10. motor 1; 11. replacement mechanism; 12. cleaning drill bit; 13. mounting plate; 14. fixing block; 15. mounting rod; 16. mounting sleeve; 21. horizontal pipeline; 22. connecting auxiliary pipe; 23. vertical pipeline; 61. driving frame; 62. conveyor belt; 63. moving wheel; 71. motor 2; 72. bevel gear 1; 73. threaded rod; 74. bevel gear 2; 81. sliding pin 1; 82. locking nut 1; 83. oblong hole 1; 91. sliding pin 2; 92. locking nut 2; 93. oblong hole 2; 111. sleeve block; 112. threaded mounting hole; 121. top plate; 122. rotating rod; 123. spiral convex ring. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Embodiment 1

[0034] See also Figure 1-6 The present invention provides a technical solution, a municipal sewage well convenient silt removal device, comprising a ground 1, a sewage well body 2 is buried inside the ground 1, a keel frame 4 is arranged on the right side of the top of the ground 1, and moving wheel groups 5 are fixedly installed at the four corners of the bottom of the keel frame 4, a conveying mechanism 6 is arranged at the bottom of the inner side of the keel frame 4, a limiting mechanism 1 7 is arranged at the top of the inner side of the keel frame 4, an adjusting mechanism 8 is arranged on the front side of the keel frame 4, and a limiting mechanism 2 9 is arranged at the left end of the bottom of the front side of the keel frame 4, a mounting plate 13 matched with the limiting mechanism 1 7 is arranged at the top of the inner side of the keel frame 4, a motor 10 is fixedly installed at the left end of the top of the mounting plate 13, the output shaft of the motor 10 passes through the bottom of the mounting plate 13 and is fixedly installed with a replacement mechanism 11, and a cleaning drill bit 12 is arranged at the bottom of the replacement mechanism 11, and the bottom end of the cleaning drill bit 12 extends into the interior of the sewage well body 2.

[0035] As a preferred case in this embodiment: the sewage well body 2 includes a horizontal pipe 21 buried horizontally in the ground 1, the front and rear sides of the horizontal pipe 21 are connected to a connecting auxiliary pipe 22, and the top of the horizontal pipe 21 is connected to a vertical pipe 23 compatible with the cleaning drill bit 12.

[0036] As a preferred example in this embodiment: the conveying mechanism 6 includes a driving frame 61 sliding at the bottom of the inner cavity of the keel frame 4, the inner cavity of the driving frame 61 is movably connected with a conveyor belt 62, and moving wheels 63 are fixedly installed at the four corners of the bottom of the driving frame 61.

[0037] As a preferred case in this embodiment: the limiting mechanism 7 includes a motor 2 71 fixedly installed on the front side of the keel frame 4, the output end of the motor 2 71 passes through the inner cavity of the keel frame 4 and is fixedly connected to a bevel gear 1 72, a threaded rod 73 is penetrated through one side of the inner cavity of the keel frame 4, the bottom end of the threaded rod 73 is fixedly connected to a bevel gear 2 74 matched with the bevel gear 1 72, and the right side of the mounting plate 13 is threadedly connected to the surface of the threaded rod 73.

[0038] As a preferred case in this embodiment: the adjustment mechanism 8 includes a sliding pin 81 welded to the front and rear sides of the mounting plate 13 and an oblong hole 83 opened at the top of the front and rear sides of the keel frame 4, and the end of the sliding pin 81 away from the mounting plate 13 extends into the inner cavity of the oblong hole 83 and slides in the inner cavity of the oblong hole 83, and the surface of the sliding pin 81 is threadedly connected to a locking nut 82 located on the outside of the keel frame 4.

[0039] As a preferred case in this embodiment: the limiting mechanism 29 includes a sliding pin 291 welded to the front and rear sides of the conveying mechanism 6 and an oblong hole 293 opened at the bottom of the front and rear sides of the keel frame 4, and the end of the sliding pin 291 away from the conveying mechanism 6 extends into the inner cavity of the oblong hole 293 and slides in the inner cavity of the oblong hole 293, and the surface of the sliding pin 291 is threadedly connected to a locking nut 292 located on the outside of the keel frame 4.

[0040] As a preferred example in this embodiment: the replacement mechanism 11 includes a sleeve block 111, a threaded mounting hole 112 is opened on the top of the sleeve block 111, and the sleeve block 111 is threadedly connected to the output shaft of the motor 10 through the threaded mounting hole 112.

[0041] As a preferred example in this embodiment: the cleaning drill bit 12 includes a top plate 121, a rotating rod 122 is welded to the bottom of the top plate 121, and a spiral convex ring 123 distributed in a spiral shape is arranged on the surface of the rotating rod 122.

[0042] As a preferred case in this embodiment: a fixing block 14 is welded on the top of the top plate 121, and mounting rods 15 are rotatably connected on both sides of the fixing block 14, and mounting sleeves 16 are welded on both sides of the sleeve block 111, and mounting bolts 3 are penetrated through the top and bottom of the front and rear sides of the mounting sleeve 16, and the mounting rod 15 is flipped into the inner cavity of the mounting sleeve 16 and fixedly installed in the inner cavity of the mounting sleeve 16 by the mounting bolts 3.

[0043] A construction method for a convenient desilting device for a municipal sewage well, the construction steps are as follows:

[0044] 1. First, push the keel frame 4 and move it to the vicinity of the sewage well body 2 that needs to be desilted, and then install a suitable cleaning drill bit 12 according to the diameter of the vertical pipe 23 on the sewage well body 2.

[0045] 2. When installing the cleaning drill bit 12, the user places the cleaning drill bit 12 just below the replacement mechanism 11, then flips the mounting rod 15 upward and flips the mounting rod 15 into the inner cavity of the mounting sleeve 16, then inserts the mounting bolt 3, and uses the mounting bolt 3 to fix the mounting rod 15 in the mounting sleeve 16 to complete the installation of the cleaning drill bit 12, and then loosens the locking nut 1 82, and starts the motor 2 71 to drive the bevel gear 1 72 to rotate, the bevel gear 1 72 drives the bevel gear 2 74 to rotate, and the bevel gear 2 74 drives the screw nut 1 82 to rotate. The threaded rod 73 rotates, and the threaded rod 73 drives the mounting plate 13 to move downward and allows the drill bit 12 to extend from the vertical pipe 23 into the inner cavity of the sewage well body 2. When the entire rotating rod 122 is completely immersed in the sewage well body 2, tighten the locking nut 82, and the user starts the motor 10. The motor 10 will drive the entire cleaning drill bit 12 to rotate through the replacement mechanism 11. Under the action of the spiral convex ring 123, the sludge in the sewage well body 2 is brought out to the outside in a spiral manner, and will fall onto the conveyor belt 62 for transportation.

[0046] 3. Before the sludge is sent to the conveyor belt 62, the user starts the conveying mechanism 6 to put the conveyor belt 62 in a conveying state. When the sludge is sent to the conveyor belt 62, it will be conveyed to the gathering place for unified treatment.

[0047] 4. Before working in step 3, the user can adjust the spacing between the conveying mechanism 6 and the cleaning drill bit 12 according to the distance between the conveying mechanism 6 and the cleaning drill bit 12. When adjusting, the user loosens the locking nut 92, and then pushes the conveying mechanism 6 to move in the direction of the cleaning drill bit 12 until it is suitable, and tightens the locking nut 92 so that the cleaned sludge can be smoothly sent to the conveyor belt 62.

[0048] 5. According to steps 1 to 4, after dredging is completed, the user loosens the locking nut 82 again, starts the motor 71 to move the cleaning drill 12 upward out of the inner cavity of the sewage well body 2, completes the folding work, and moves the entire dredging device aside.

[0049] Sixth, the user rinses the surface of the cleaning drill bit 12 to clean the sludge remaining on the surface to ensure that the cleaning drill bit 12 is clean for the next use.

[0050] Therefore, the cleaning drill bit 12 is driven to rotate by the motor 10 to clean the sludge in the sewage well body 2 out of the sewage well body 2, replacing the traditional manual cleaning. It is fast and efficient, and the cleaned sludge can be transmitted to the gathering point to avoid accumulation around the sewage well body 2 and falling back into the sewage well body 2. The focus of the present invention is to replace the traditional manual cleaning and transmit the cleaned sludge. The above two functions are integrated into one device to achieve synchronous use, which is conducive to promotion and use.

[0051] To sum up: the municipal sewage well convenient dredging device and construction method, through the motor 10 to drive the cleaning drill bit 12 to rotate, the sludge in the sewage well body 2 is cleaned out, replacing the traditional manual cleaning, with fast speed and high efficiency, and the cleaned sludge can also be transmitted to the gathering point to avoid accumulation around the sewage well body 2 and falling back into the sewage well body 2, and the focus of the present invention is to replace the traditional manual cleaning and transmit the cleaned sludge, the above two functions are integrated into one device to achieve synchronous use, which is conducive to promotion and use, the municipal sewage well convenient dredging device and construction method, has the advantages of replacing the traditional manual cleaning and transmitting the cleaned sludge into one device, solves the problem that the traditional cleaning method is generally manual cleaning, the manual cleaning speed is slow, the workload is large, and the cleaning depth is shallow, it is difficult to achieve deep cleaning, even if there is sludge cleaning equipment, the cleaning end thereon is difficult to adjust and replace according to the caliber of the sewage well, which is not conducive to use, and the cleaned sludge will accumulate around the equipment, there is no transmission device, causing the sludge to fall back into the sewage well, affecting the cleaning progress.

[0052] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A municipal sewage well convenient desilting device, comprising a ground surface (1), characterized in that: A sewage well body (2) is buried inside the ground (1), a keel frame (4) is arranged on the right side of the top of the ground (1), and moving wheel groups (5) are fixedly installed at the four corners of the bottom of the keel frame (4), a conveying mechanism (6) is arranged at the bottom of the inner side of the keel frame (4), a limiting mechanism (7) is arranged at the top of the inner side of the keel frame (4), an adjustment mechanism (8) is arranged on the front side of the keel frame (4), and a limiting mechanism (9) is arranged at the left end of the bottom of the front side of the keel frame (4), a mounting plate (13) compatible with the limiting mechanism (7) is arranged at the top of the inner side of the keel frame (4), a motor (10) is fixedly installed at the left end of the top of the mounting plate (13), the output shaft of the motor (10) passes through the bottom of the mounting plate (13) and is fixedly installed with a replacement mechanism (11), a cleaning drill bit (12) is arranged at the bottom of the replacement mechanism (11), and the bottom end of the cleaning drill bit (12) extends into the interior of the sewage well body (2), The sewage well body (2) comprises a transverse pipe (21) transversely buried in the ground (1), the front and rear sides of the transverse pipe (21) are both connected to auxiliary connecting pipes (22), and the top of the transverse pipe (21) is connected to a vertical pipe (23) adapted to the cleaning drill bit (12). The conveying mechanism (6) comprises a driving frame (61) sliding at the bottom of the inner cavity of the keel frame (4); the inner cavity of the driving frame (61) is movably connected to a conveyor belt (62); and moving wheels (63) are fixedly mounted at the four corners of the bottom of the driving frame (61). Wherein: the limiting mechanism 1 (7) comprises a motor 2 (71) fixedly mounted on the front side of the keel frame (4); the output end of the motor 2 (71) penetrates into the inner cavity of the keel frame (4) and is fixedly connected to a bevel gear 1 (72); a threaded rod (73) is penetrated through one side of the inner cavity of the keel frame (4); the bottom end of the threaded rod (73) is fixedly connected to a bevel gear 2 (74) matched with the bevel gear 1 (72); the right side of the mounting plate (13) is threadedly connected to the surface of the threaded rod (73); The adjusting mechanism (8) comprises a sliding pin (81) welded to the front and rear sides of the mounting plate (13) and an oblong hole (83) provided at the top of the front and rear sides of the keel frame (4); one end of the sliding pin (81) away from the mounting plate (13) extends into the inner cavity of the oblong hole (83) and slides in the inner cavity of the oblong hole (83); a surface of the sliding pin (81) is threadedly connected to a locking nut (82) located on the outer side of the keel frame (4); Wherein: the second limiting mechanism (9) comprises a second sliding pin (91) welded to the front and rear sides of the transmission mechanism (6) and a second oblong hole (93) opened at the bottom of the front and rear sides of the keel frame (4); the end of the second sliding pin (91) away from the transmission mechanism (6) extends into the inner cavity of the second oblong hole (93) and slides in the inner cavity of the second oblong hole (93); the surface of the second sliding pin (91) is threadedly connected to a second locking nut (92) located on the outer side of the keel frame (4); The replacement mechanism (11) comprises a sleeve (111), a threaded mounting hole (112) is provided on the top of the sleeve (111), and the sleeve (111) is threadedly connected to the output shaft of the motor 1 (10) through the threaded mounting hole (112). The cleaning drill bit (12) comprises a top plate (121), a rotating rod (122) is welded to the bottom of the top plate (121), and a spiral convex ring (123) distributed in a spiral shape is provided on the surface of the rotating rod (122). Wherein: a fixing block (14) is welded on the top of the top plate (121), mounting rods (15) are rotatably connected to both sides of the fixing block (14), mounting sleeves (16) are welded on both sides of the sleeve block (111), mounting bolts (3) are penetrated at the top and bottom of the front and rear sides of the mounting sleeve (16), and the mounting rod (15) is turned into the inner cavity of the mounting sleeve (16) and fixedly mounted in the inner cavity of the mounting sleeve (16) by means of the mounting bolts (3).

2. A construction method for a convenient desilting device for a municipal sewage well, with respect to the convenient desilting device for a municipal sewage well as claimed in claim 1, the construction method comprises the following steps:

1. First, push the keel frame (4) and move the keel frame (4) to the vicinity of the sewage well body (2) that needs to be desilted, and then install a suitable cleaning drill bit (12) according to the diameter of the vertical pipe (23) on the sewage well body (2); 2. When installing the cleaning drill bit (12), the user places the cleaning drill bit (12) just below the replacement mechanism (11), then flips the mounting rod (15) upward and flips the mounting rod (15) into the inner cavity of the mounting sleeve (16), then inserts the mounting bolt (3), and uses the mounting bolt (3) to fix the mounting rod (15) in the mounting sleeve (16), completing the installation of the cleaning drill bit (12), and then loosens the locking nut (82), and starts the motor (71) to drive the bevel gear (72) to rotate, the bevel gear (72) drives the bevel gear (74) to rotate, and the bevel gear (74) drives the bevel gear (74) to rotate. The threaded rod (73) rotates, and the threaded rod (73) drives the mounting plate (13) to move downward and causes the drill bit (12) to extend from the vertical pipe (23) into the inner cavity of the sewage well body (2). When the entire rotating rod (122) is completely immersed in the sewage well body (2), the locking nut (82) is tightened, and the user starts the motor (10). The motor (10) drives the entire cleaning drill bit (12) to rotate through the replacement mechanism (11). Under the action of the spiral convex ring (123), the sludge in the sewage well body (2) is brought out to the outside in a spiral manner, and falls onto the conveyor belt (62) for transportation; 3. Before the sludge is sent to the conveyor belt (62), the user starts the conveying mechanism (6) so that the conveyor belt (62) is in a conveying state. When the sludge is sent to the conveyor belt (62), it is conveyed to a gathering place for unified treatment; 4. Before the third step, the user can adjust the distance between the conveying mechanism (6) and the cleaning drill bit (12) according to the distance between the conveying mechanism (6) and the cleaning drill bit (12). When adjusting, the user loosens the locking nut (92), and then pushes the conveying mechanism (6) to move in the direction of the cleaning drill bit (12) until it is appropriate, and then tightens the locking nut (92), so that the cleaned sludge can be smoothly sent to the conveyor belt (62); 5. After the dredging is completed according to steps 1 to 4, the user loosens the locking nut 1 (82) again, starts the motor 2 (71) to move the cleaning drill bit (12) upward out of the inner cavity of the sewage well body (2), completes the folding work, and moves the entire dredging device aside; Sixth, the user then rinses the surface of the cleaning drill bit (12) to remove the sludge remaining on the surface, thereby ensuring that the cleaning drill bit (12) is clean for the next use.

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