Tubular suction dredger based on center transmission and operation method of tubular suction dredger

Abstract

The invention discloses a tubular suction dredger based on center transmission and an operation method thereof, and relates to the technical field of tubular suction dredgers, the tubular suction dredger comprises a pool body, a sludge discharge pipe is arranged at the lower end of the pool body, a working bridge is arranged above the pool body, and a driving mounting seat is arranged above the working bridge; a central rotating shaft is arranged below the working bridge, a first connecting ring and a second connecting ring are arranged outside the central rotating shaft, an L-shaped scraping frame is arranged at the bottom of the pool body, one end of the L-shaped scraping frame is rotatably connected with the second connecting ring, scraping plates are arranged below and on the outer side of the L-shaped scraping frame, and the scraping plates are obliquely arranged. According to the tubular suction dredger, the scraping frames are arranged in an L shape, a plurality of scraping plates are installed on the lower portion and the side face of each scraping frame, the scraping plates are installed in an inclined mode, sludge on the side wall of a pool can be scraped away, the multiple scraping plates installed in an inclined mode can play a force unloading role in the sludge scraping process, and the using effect of the tubular suction dredger is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tube type sludge suction machines, and particularly to a tube type sludge suction machine based on central drive and its operation method. Background Technique

[0002] A tube type sludge suction machine is a device widely used in sewage treatment, water environment governance and sludge cleaning in industrial sedimentation tanks. It realizes the extraction, transportation and discharge of sludge through a pipeline system. According to different structures and working principles, it can be divided into a single-tube sludge suction machine and a double-tube sludge suction machine. The single-tube sludge suction machine consists of a sludge suction pipe, a rotary drive device, a sludge collection tank and a control system. The double-tube sludge suction machine consists of two sludge suction pipes, a central rotary support, a transmission system and a sludge discharge device. Through continuous rotation or reciprocating motion, uniform extraction of sludge is achieved, avoiding sludge caking or sedimentation.

[0003] Chinese Patent Publication No. is CN206746062U, and the authorization announcement date is December 15, 2017. A central drive single-tube sludge suction machine includes a working bridge, a central column, a central rotating cage and a sludge collection cylinder, a scum scraping and collecting device, a sludge scraping pipe and a balance counterweight frame. The sludge scraping pipe and the balance counterweight frame are both connected to the truss or the central rotating cage through tie rods. An induction plate extending above the highest water surface in the tank during the sewage treatment of a radial secondary sedimentation tank is fixed on the tie rod connected to the sludge scraping pipe and / or the tie rod connected to the balance counterweight frame. A position induction switch for sensing the position of the induction plate is arranged on the working bridge. The position induction switch is connected to a control cabinet with a PLC control chip through a data line. The control cabinet with the PLC control chip is fixed on the working bridge. A program-controlled switch controlled by the control cabinet with the PLC control chip is arranged on the line between the control cabinet with the PLC control chip and the motor. This structure enables the duty personnel to know the faults in a timely, rapid and intuitive manner, shortens the maintenance cycle and reduces the maintenance cost.

[0004] The existing tube type sludge suction machine rotates a scraper at the bottom of the water tank, and uses the rotating scraper to scrape the sludge. The scraper adopts an integral structure. As the amount of scraped sludge increases, the resistance of the rotating support increases, which easily causes the scraper to deform and damage, reducing the sludge scraping effect and not meeting the use requirements. Summary of the Invention

[0005] The purpose of the present invention is to provide a tube type sludge suction machine based on central drive and its operation method to solve the problem raised in the above background technique that the existing tube type sludge suction machine rotates a scraper at the bottom of the water tank, uses the rotating scraper to scrape the sludge, the scraper adopts an integral structure, as the amount of scraped sludge increases, the resistance of the rotating support increases, which easily causes the scraper to deform and damage, reducing the sludge scraping effect and not meeting the use requirements.

[0006] To achieve the above object, the present invention provides the following technical solution: A tube type sludge suction machine based on central drive and its operation method, including a pool body. A sludge discharge pipe is arranged at the lower end of the pool body, and the sludge discharge pipe is integrally formed with the pool body. A working bridge is arranged above the pool body. A drive mounting seat is arranged above the working bridge, and the drive mounting seat is connected to the working bridge by screws. A central rotating shaft is arranged below the working bridge, and the central rotating shaft is rotatably connected through the working bridge and the drive mounting seat. The lower end of the central rotating shaft extends into the interior of the sludge discharge pipe. A first connecting ring and a second connecting ring are arranged outside the central rotating shaft, and the first connecting ring and the second connecting ring are connected to the central rotating shaft by screws. An L-shaped scraping frame is arranged at the bottom of the pool body. There are four L-shaped scraping frames, and the four L-shaped scraping frames are equidistantly arranged outside the second connecting ring. One end of the L-shaped scraping frame is rotatably connected to the second connecting ring, and the L-shaped scraping frame is inclined. Scrapers are arranged below and outside the L-shaped scraping frame, and the scrapers are connected to the L-shaped scraping frame by screws. The scrapers are inclined and are in contact with the inner wall and bottom of the pool body. Pulling ropes are arranged above the four L-shaped scraping frames, and both sides of the pulling ropes are connected to the L-shaped scraping frames and the first connecting ring respectively.

[0007] Preferably, concrete pouring columns are arranged below the pool body, and the concrete pouring columns are integrally formed with the pool body. An inspection plug is arranged below the sludge discharge pipe, and the inspection plug is threadedly connected to the sludge discharge pipe. A sludge suction pump assembly is arranged outside the pool body. A sludge suction pipe is arranged between the sludge suction pump assembly and the sludge discharge pipe, and both ends of the sludge suction pipe are integrally connected to the sludge suction pump assembly and the sludge discharge pipe respectively. The bottom of the pool body is inclined. A vibrator assembly is arranged below the pool body, and the vibrator assembly is connected to the pool body by screws.

[0008] Preferably, a drive cavity is arranged inside the drive mounting seat. A gear and a worm are arranged inside the drive cavity, and the gear and the worm are rotatably connected to the drive mounting seat. The central rotating shaft is fixedly connected through the gear, and the gear is meshed with the worm. A reduction motor is arranged on one side of the drive mounting seat, and the reduction motor is connected to the working bridge by screws. The output end of the reduction motor is connected to one end of the worm. A handwheel assembly is arranged above the drive mounting seat, and the handwheel assembly is connected to the upper end of the central rotating shaft by screws.

[0009] Preferably, a stabilizing seat is arranged below the working bridge, and the stabilizing seat is fixedly connected to the working bridge. The stabilizing seat is arranged outside the central rotating shaft. A bearing is arranged at the contact position between the central rotating shaft and the stabilizing seat, and the bearing is arranged outside the central rotating shaft. The stabilizing seat and the central rotating shaft are rotatably connected through the bearing.

[0010] Preferably, a hollow ring is provided outside the stable seat, and the hollow ring is fixedly connected to the stable seat. A discharge and distribution opening is provided below the hollow ring. There are at least four discharge and distribution openings, and the discharge and distribution openings are equidistantly arranged at the lower end of the hollow ring. A feeding pipe is provided on one side of the hollow ring, and one end of the feeding pipe is integrally connected to the hollow ring.

[0011] Preferably, two columns are provided on both sides of the pool body. The columns are fixedly connected to the pool body. Installation grooves are provided on the inner walls of the two columns. Both ends of the working bridge extend into the installation grooves, and the working bridge is slidably connected to the columns. A hydraulic cylinder assembly is provided inside the installation groove, and the hydraulic cylinder assembly is connected to the column by screws. The hydraulic cylinder assembly is provided below the working bridge, and the telescopic end of the hydraulic cylinder assembly is connected to the working bridge.

[0012] Preferably, two chutes are provided at both ends of the working bridge. A slide rail is provided inside the chute, and the slide rail is fixedly connected to the column. The slide rail is slidably connected to the working bridge. Two open slots are provided at the lower end of the working bridge, and the open slots are arranged corresponding to the pool body. The open slots are arc-shaped.

[0013] An operation method of a tube type sludge suction machine based on central drive includes the following steps:

[0014] Step 1: Inject sewage into the pool body, adjust the length of the pull rope so that the scrapers below and on the side of the L-shaped scraper frame contact the bottom and side walls of the pool body.

[0015] Step 2: Start the reduction motor to drive the worm to rotate. As the worm rotates, it drives the central rotating shaft to rotate. The rotating central rotating shaft drives the L-shaped scraper frame to rotate, and the scraper rotates along the bottom and side walls of the pool body, scraping the sludge attached to the bottom and side walls of the pool body and piling it into the sludge discharge pipe.

[0016] Step 3: Start the sludge suction pump assembly to generate suction, and under the action of the suction, draw out and discharge the sludge in the sludge discharge pipe through the sludge suction pipe.

[0017] Step 4: The treatment reagent is added from the feeding pipe into the hollow ring, and then evenly falls into the pool body through the discharge and distribution openings to mix and react with the sewage, better precipitating the sludge.

[0018] Step 5: At the same time, drive the two hydraulic cylinder assemblies to drive the working bridge to rise along the installation groove. As the working bridge rises, the entire central rotating bracket is lifted, facilitating the maintenance and replacement of the worn scrapers.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. Through the settings of the L-shaped scraping frame, scraping plate, first connecting ring, second connecting ring and pulling rope, the L-shaped scraping frame is rotationally connected to the second connecting ring, and the L-shaped scraping frame is pulled by the pulling rope between the L-shaped scraping frame and the first connecting ring. By adjusting the length and inclination angle of the pulling rope, the installation angle of the L-shaped scraping frame is changed, so that the scraping plates below and on the side of the L-shaped scraping frame are in contact with the bottom and side walls of the pool body, and the sludge on the side wall of the pool can be scraped off. There are multiple scraping plates, and the scraping plates are installed obliquely. When there is too much sludge on the sludge scraping structure, the sludge can flow away from the gap between the two scraping plates, so that the scraping plates can play a role in unloading force when scraping sludge. Even if there is a lot of accumulated sludge, the accumulated sludge exerts an upward thrust on the rotating L-shaped scraping frame, which can appropriately lift the L-shaped scraping frame, reduce the resistance of the rotating bracket, effectively prevent the L-shaped scraping frame from deforming and being damaged, and improve the use effect of the tubular sludge suction machine;

[0021] 2. Through the settings of the column, installation groove, working bridge, hydraulic cylinder assembly and opening groove, the working bridge is slidably connected to the column, and the telescopic movement of the hydraulic cylinder assembly drives the working bridge to rise and fall along the installation groove. As the working bridge rises, the central rotating bracket is lifted as a whole, leaving enough space below the whole rotating bracket to facilitate the overhaul and replacement of the worn scraping plates. When the working bridge falls, the upper end of the pool body is inserted into the opening groove to play a limiting role in the installed working bridge;

[0022] 3. Through the settings of the stabilizing seat, hollow ring, feeding pipe, bearing and discharging and distributing port, the stabilizing seat is rotationally connected to the central rotating shaft through the bearing, which plays a stabilizing role in the rotating central rotating shaft, effectively prevents the central rotating shaft from rotating with excessive deviation, and better scrapes the pool body. The treatment reagent is added from the feeding pipe into the hollow ring, and then evenly falls into the pool body through the discharging and distributing port to mix and react with the sewage, so as to better precipitate the sludge. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is the overall structural schematic diagram of the present invention;

[0024] Figure 2 is the connection structure diagram of the L-shaped scraping frame and the central rotating shaft of the present invention;

[0025] Figure 3 is of the present invention Figure 1 partial enlarged view of Area A;

[0026] Figure 4 is the cross-sectional view of the pool body of the present invention;

[0027] Figure 5 is the connection relationship diagram of the gear and the worm of the present invention;

[0028] Figure 6 is the connection relationship diagram of the working bridge and the column of the present invention;

[0029] Figure 7 Structural diagram of the connection between the hollow ring and the stable seat of the present invention.

[0030] In the figure: 1, pool body; 2, concrete pouring column; 3, sludge suction pump assembly; 4, sludge suction pipe; 5, column; 6, installation groove; 7, working bridge; 8, L-shaped scraping frame; 9, scraper; 10, driving installation seat; 11, handwheel assembly; 12, central rotating shaft; 13, first connecting ring; 14, second connecting ring; 15, pulling rope; 16, stable seat; 17, reduction motor; 18, sludge discharge pipe; 19, maintenance plug; 20, vibrator assembly; 21, driving cavity; 22, gear; 23, worm; 24, hydraulic cylinder assembly; 25, hollow ring; 26, feeding pipe; 27, bearing; 28, discharging and distributing port; 29, slide rail; 30, chute; 31, opening groove. Specific implementation mode

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0032] Please refer to Figures 1-7, an embodiment provided by the present invention: a tube - type sludge suction machine based on central drive and its operation method, including a pool body 1. A sludge discharge pipe 18 is arranged at the lower end of the pool body 1, and the sludge discharge pipe 18 is integrally formed with the pool body 1. Above the pool body 1, there is a working bridge 7. Above the working bridge 7, there is a drive mounting seat 10, and the drive mounting seat 10 is connected to the working bridge 7 by screws. Below the working bridge 7, there is a central rotating shaft 12, and the central rotating shaft 12 is rotationally connected through the working bridge 7 and the drive mounting seat 10. The lower end of the central rotating shaft 12 extends into the interior of the sludge discharge pipe 18. On the outside of the central rotating shaft 12, there are a first connection ring 13 and a second connection ring 14, and the first connection ring 13 and the second connection ring 14 are connected to the central rotating shaft 12 by screws. At the bottom of the pool body 1, there is an L - shaped scraping frame 8. There are four L - shaped scraping frames 8, and the four L - shaped scraping frames 8 are equidistantly arranged outside the second connection ring 14. One end of the L - shaped scraping frame 8 is rotationally connected to the second connection ring 14, and the L - shaped scraping frame 8 is inclined. Below and on the outside of the L - shaped scraping frame 8, there are scraping plates 9, and the scraping plates 9 are connected to the L - shaped scraping frames 8 by screws. The scraping plates 9 are inclined and are in contact with the inner wall and the bottom of the pool body 1. Above each of the four L - shaped scraping frames 8, there is a pull rope 15, and both sides of the pull rope 15 are connected to the L - shaped scraping frame 8 and the first connection ring 13 respectively. Below the pool body 1, there are concrete casting columns 2, and the concrete casting columns 2 are integrally cast with the pool body 1. Below the sludge discharge pipe 18, there is a maintenance plug 19, and the maintenance plug 19 is threadedly connected to the sludge discharge pipe 18. Outside the pool body 1, there is a sludge suction pump assembly 3. Between the sludge suction pump assembly 3 and the sludge discharge pipe 18, there is a sludge suction pipe 4, and both ends of the sludge suction pipe 4 are integrally connected to the sludge suction pump assembly 3 and the sludge discharge pipe 18 respectively. The bottom of the pool body 1 is inclined. Below the pool body 1, there is a vibrator assembly 20, and the vibrator assembly 20 is connected to the pool body 1 by screws. Inside the drive mounting seat 10, there is a drive cavity 21. Inside the drive cavity 21, there are a gear 22 and a worm 23, and the gear 22 and the worm 23 are rotationally connected to the drive mounting seat 10. The central rotating shaft 12 is fixedly connected through the gear 22, and the gear 22 is meshed with the worm 23. On one side of the drive mounting seat 10, there is a reduction motor 17, and the reduction motor 17 is connected to the working bridge 7 by screws. The output end of the reduction motor 17 is connected to one end of the worm 23. Above the drive mounting seat 10, there is a handwheel assembly 11, and the handwheel assembly 11 is connected to the upper end of the central rotating shaft 12 by screws.

[0033] During use: Inject sewage into the tank body 1 for sedimentation. Adjust the length and inclination angle of the pull rope 15 so that the scraping plates 9 below and on the side of the L-shaped scraping frame 8 are in contact with the bottom surface and the side wall of the tank body 1. Start the reduction motor 17 to drive the worm 23 to rotate. The worm 23 is meshed and connected with the gear 22. As the worm 23 rotates, it drives the central rotating shaft 12 to rotate. The rotating central rotating shaft 12 drives the L-shaped scraping frame 8 to rotate. The scraping plates 9 rotate along the bottom surface and the side wall of the tank body 1, scraping off the sludge attached to the bottom surface and the side wall of the tank body 1 and piling it up into the sludge discharge pipe 18. Start the sludge suction pump assembly 3 to generate suction. Under the action of the suction, the sludge in the sludge discharge pipe 18 is pumped out and discharged through the sludge suction pipe 4.

[0034] Please refer to Figure 3 and Figure 7 As shown in, a stabilizing seat 16 is arranged below the working bridge 7, and the stabilizing seat 16 is fixedly connected with the working bridge 7. The stabilizing seat 16 is arranged outside the central rotating shaft 12. A bearing 27 is arranged at the contact position between the central rotating shaft 12 and the stabilizing seat 16, and the bearing 27 is arranged outside the central rotating shaft 12. The stabilizing seat 16 and the central rotating shaft 12 are rotationally connected through the bearing 27. A hollow ring 25 is arranged outside the stabilizing seat 16, and the hollow ring 25 is fixedly connected with the stabilizing seat 16. A discharging and distributing port 28 is arranged below the hollow ring 25. There are at least four discharging and distributing ports 28, and the discharging and distributing ports 28 are equidistantly arranged at the lower end of the hollow ring 25. A feeding pipe 26 is arranged on one side of the hollow ring 25, and one end of the feeding pipe 26 is integrally connected with the hollow ring 25. The stabilizing seat 16 and the bearing 27 play a stabilizing role in the rotating central rotating shaft 12, effectively preventing the central rotating shaft 12 from rotating with excessive deviation, and better scraping the tank body 1. The treatment reagent is added into the hollow ring 25 from the feeding pipe 26, and then evenly falls into the tank body 1 through the discharging and distributing ports 28 to be mixed and reacted with the sewage, so as to better precipitate the sludge.

[0035] Please refer to Figure 1 and Figure 6, columns 5 are provided on both sides of the pool body 1. There are two columns 5, and the columns 5 are fixedly connected to the pool body 1. Installation grooves 6 are provided on the inner walls of the two columns 5. Both ends of the working bridge 7 extend into the interior of the installation grooves 6, and the working bridge 7 is slidably connected to the columns 5. A hydraulic cylinder assembly 24 is provided inside the installation groove 6, and the hydraulic cylinder assembly 24 is connected to the column 5 by screws. The hydraulic cylinder assembly 24 is arranged below the working bridge 7, and the telescopic end of the hydraulic cylinder assembly 24 is connected to the working bridge 7. Both ends of the working bridge 7 are provided with sliding grooves 30. There are two sliding grooves 30. A sliding rail 29 is provided inside the sliding grooves 30, and the sliding rail 29 is fixedly connected to the column 5. The sliding rail 29 is slidably connected to the working bridge 7. An opening groove 31 is provided at the lower end of the working bridge 7. There are two opening grooves 31, and the opening grooves 31 are arranged corresponding to the pool body 1. The opening grooves 31 are arc-shaped. At the same time, the two hydraulic cylinder assemblies 24 are driven to drive the working bridge 7 to lift along the installation groove 6. As the working bridge 7 rises, the central rotating bracket is lifted as a whole, which is convenient for overhauling and replacing the worn scraper 9. When the working bridge 7 falls, the upper end of the pool body 1 is jacked into the opening groove 31, which plays a limiting role in the installed working bridge 7. The sliding rail 29 and the sliding groove 30 play a guiding role in the lifting and lowering working bridge 7, and can ensure the stable lifting and lowering of the working bridge 7.

[0036] An operation method of a tube type sludge suction machine based on central drive includes the following steps:

[0037] Step 1: Inject sewage into the pool body 1, adjust the length of the pull rope 15 so that the scrapers 9 below and on the side of the L-shaped scraper 8 are in contact with the bottom and side walls of the pool body 1;

[0038] Step 2: Start the reduction motor 17 to drive the worm 23 to rotate. As the worm 23 rotates, the central rotating shaft 12 rotates. The rotating central rotating shaft 12 drives the L-shaped scraper 8 to rotate, and the scraper 9 rotates along the bottom and side walls of the pool body 1, scraping the sludge attached to the bottom and side walls of the pool body 1 and piling it into the sludge discharge pipe 18;

[0039] Step 3: Start the sludge suction pump assembly 3 to generate suction. Under the action of the suction, the sludge in the sludge discharge pipe 18 is pumped out and discharged through the sludge suction pipe 4;

[0040] Step 4: The treatment reagent is added from the feeding pipe 26 into the hollow ring 25, and then evenly falls into the pool body 1 through the discharge and distribution ports 28 to mix and react with the sewage, better precipitating the sludge;

[0041] Step 5: At the same time, drive the two hydraulic cylinder assemblies 24 to drive the working bridge 7 to rise along the installation groove 6. As the working bridge 7 rises, the central rotating bracket is lifted as a whole, which is convenient for overhauling and replacing the worn scraper 9.

[0042] The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

[0043] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A tubular dredge suction machine based on central transmission and its operation method, comprising a tank body (1), characterized in that: A mud discharge pipe (18) is provided at the lower end of the tank body (1), and the mud discharge pipe (18) and the tank body (1) are integrally provided. A working bridge (7) is provided above the tank body (1), and a driving mounting seat (10) is provided above the working bridge (7), and the driving mounting seat (10) is connected to the working bridge (7) by screws. A central rotating shaft (12) is provided below the working bridge (7), and the central rotating shaft (12) is rotatably connected to the working bridge (7) and the driving mounting seat (10). The lower end of the central rotating shaft (12) extends to the inside of the mud discharge pipe (18), and a first connecting ring (13) and a second connecting ring (14) are provided outside the central rotating shaft (12), and the first connecting ring (13) and the second connecting ring (14) The tank body (1) is connected to the central rotating shaft (12) by screws. An L-shaped scraper (8) is arranged at the bottom of the tank body (1). Four L-shaped scrapers (8) are arranged, and the four L-shaped scrapers (8) are arranged equidistantly outside the second connecting ring (14). One end of the L-shaped scraper (8) is rotatably connected to the second connecting ring (14), and the L-shaped scraper (8) is arranged obliquely. Scrapers (9) are arranged below and outside the L-shaped scraper (8), and the scrapers (9) are connected to the L-shaped scraper (8) by screws. The scrapers (9) are arranged obliquely, and the scrapers (9) fit the inner wall and bottom of the tank body (1). Pull ropes (15) are arranged above the four L-shaped scrapers (8), and the two sides of the pull ropes (15) are respectively connected to the L-shaped scraper (8) and the first connecting ring (13).

2. A central transmission tube-type dredge suction machine according to claim 1, characterized in that: A concrete casting column (2) is arranged below the pool body (1), and the concrete casting column (2) and the pool body (1) are cast as one body. A maintenance plug (19) is arranged below the mud discharge pipe (18), and the maintenance plug (19) is threadedly connected to the mud discharge pipe (18). A mud suction pump assembly (3) is arranged outside the pool body (1), and a mud suction pipe (4) is arranged between the mud suction pump assembly (3) and the mud discharge pipe (18), and the two ends of the mud suction pipe (4) are respectively connected to the mud suction pump assembly (3) and the mud discharge pipe (18) as one body. The bottom of the pool body (1) is arranged at an angle, and a vibrator assembly (20) is arranged below the pool body (1), and the vibrator assembly (20) is connected to the pool body (1) by screws.

3. A central transmission tube-type dredge suction machine according to claim 2, characterized in that: A driving cavity (21) is provided inside the driving mounting seat (10), and a gear (22) and a worm (23) are provided inside the driving cavity (21), and the gear (22) and the worm (23) are rotatably connected to the driving mounting seat (10), the central rotating shaft (12) and the gear (22) are fixedly connected through, and the gear (22) and the worm (23) are meshingly connected, a reduction motor (17) is provided on one side of the driving mounting seat (10), and the reduction motor (17) is connected to the working bridge (7) by screws, and the output end of the reduction motor (17) is connected to one end of the worm (23), and a handwheel assembly (11) is provided above the driving mounting seat (10), and the handwheel assembly (11) is connected to the upper end of the central rotating shaft (12) by screws.

4. A central transmission tube-type dredge suction machine according to claim 3, characterized in that: A stabilizing seat (16) is provided below the working bridge (7), and the stabilizing seat (16) is fixedly connected to the working bridge (7); the stabilizing seat (16) is provided outside the central rotating shaft (12); a bearing (27) is provided at the contact point between the central rotating shaft (12) and the stabilizing seat (16), and the bearing (27) is provided outside the central rotating shaft (12); the stabilizing seat (16) and the central rotating shaft (12) are rotatably connected via the bearing (27).

5. A central transmission tube-type dredge suction machine according to claim 4, characterized in that: A hollow circular ring (25) is arranged outside the stabilizing seat (16), and the hollow circular ring (25) is fixedly connected to the stabilizing seat (16); a discharging and dividing opening (28) is arranged below the hollow circular ring (25); at least four discharging and dividing openings (28) are arranged, and the discharging and dividing openings (28) are arranged equidistantly at the lower end of the hollow circular ring (25); a feeding pipe (26) is arranged on one side of the hollow circular ring (25), and one end of the feeding pipe (26) is connected to the hollow circular ring (25) as a whole.

6. A central transmission tube-type dredge suction machine according to claim 5, characterized in that: The pool body (1) is provided with columns (5) on both sides, two columns (5) are provided, and the columns (5) are fixedly connected to the pool body (1), and the inner walls of the two columns (5) are provided with mounting grooves (6), and both ends of the working bridge (7) extend into the interior of the mounting grooves (6), and the working bridge (7) is slidably connected to the columns (5), and a hydraulic cylinder assembly (24) is provided inside the mounting groove (6), and the hydraulic cylinder assembly (24) is connected to the columns (5) by screws, and the hydraulic cylinder assembly (24) is arranged below the working bridge (7), and the telescopic end of the hydraulic cylinder assembly (24) is connected to the working bridge (7).

7. A central transmission tube-type dredge suction machine according to claim 6, characterized in that: Both ends of the working bridge (7) are provided with slide grooves (30), and there are two slide grooves (30). A slide rail (29) is provided inside the slide groove (30), and the slide rail (29) is fixedly connected to the column (5). The slide rail (29) is slidably connected to the working bridge (7). The lower end of the working bridge (7) is provided with an opening groove (31), and there are two opening grooves (31), and the opening grooves (31) are arranged corresponding to the pool body (1), and the opening grooves (31) are arranged in an arc shape.

8. The method for operating a centrally-driven tubular dredger according to claim 7, characterized in that: The following steps are involved: Step 1: inject sewage into the tank body (1), and adjust the length of the pull rope (15) so that the scrapers (9) below and on the sides of the L-shaped scraper (8) are in contact with the bottom surface and side walls of the tank body (1); Step 2: Turn on the reduction motor (17) to drive the worm (23) to rotate. As the worm (23) rotates, the central rotating shaft (12) is driven to rotate. The rotating central rotating shaft (12) drives the L-shaped scraper (8) to rotate. The scraper (9) rotates in contact with the bottom surface and side walls of the tank body (1), scraping off the sludge attached to the bottom surface and side walls of the tank body (1) and sending it to the sludge discharge pipe (18); Step 3: Turn on the sludge suction pump assembly (3) to generate suction, and under the action of the suction force, use the sludge suction pipe (4) to extract and discharge the sludge in the sludge discharge pipe (18); Step 4: The treatment reagent is added into the hollow ring (25) from the feeding pipe (26), and then evenly falls into the tank body (1) through the discharging and distribution port (28) to mix and react with the sewage, so as to better precipitate the sludge; Step 5: Simultaneously drive the two hydraulic cylinder assemblies (24) to drive the working bridge (7) to rise along the mounting groove (6). As the working bridge (7) rises, the central rotating bracket is lifted as a whole, making it convenient to inspect and replace the worn scraper (9).

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