CN217613133U - Suction mud scraper without dead angle - Google Patents

Abstract

The application relates to a suction mud scraper without dead angles, which comprises a mud suction machine and a mud suction pipeline, wherein a pipeline expansion joint is arranged between the mud suction machine and the mud suction pipeline and comprises an inner pipe and an outer pipe, the outer pipe is sleeved on the inner pipe in a sleeving manner, the outer pipe is connected with the inner pipe in a sliding manner, one end, away from the inner pipe, of the outer pipe is communicated with the mud suction machine, one end, away from the outer pipe, of the inner pipe is communicated with the mud suction pipeline, and one end, away from the mud suction machine, of the mud suction pipeline is fixedly communicated with a mud scraper; be provided with the pipeline cover body on the suction dredge, be provided with between the pipeline cover body and the suction dredge and supply the pipeline telescopic joint that the pipeline cover body is close to or keeps away from the bottom of the pool, inside the suction dredge pipeline was fixed in the pipeline cover body and set body telescopic joint, this application had the effect of carrying out the mud of arranging to sedimentation tank ramp bottom closed angle department.

Description

No dead angle suction mud scraper

Technical Field

The application relates to the technical field of biological treatment of sewage treatment plants, in particular to a suction mud scraper without dead angles.

Background

In the current sewage treatment, the sludge treatment of the sewage in a sedimentation tank is part of the sewage treatment process. In the sludge treatment process of the sedimentation tank, timely sludge discharge is an extremely important work in the operation management of the sedimentation tank. For sludge discharge of the sedimentation tank, a suction mud scraper is usually adopted to slide on a straight-through rail above the sedimentation tank, and a pipeline, a mud scraper and a sludge suction nozzle below the suction mud scraper are driven to perform sludge discharge at the bottom of the sedimentation tank.

The scheme before improvement is as follows: the suction and scraping mud suction machine slides on the straight-through track, the frame body drives the mud scraping plate and the suction device to move, and when mud is scraped to the lower part of the mud suction plate, the mud is sucked out through the mud suction device.

In the research, development and improvement processes, the inventor finds that a sedimentation tank in which the suction mud scraper works is the bottom of a slope tank, a mud suction mud scraper frame body of conventional machinery is a fixed frame body, when the mud scraper works, sludge at the bottom of the slope cannot be scraped and sucked, sludge sedimentation and anaerobic fermentation are possibly generated, sludge floats upwards, the quality of effluent water is deteriorated, the sewage treatment capacity is reduced, and the quality of the effluent water cannot reach the standard.

SUMMERY OF THE UTILITY MODEL

In order to carry out the row mud to sedimentation tank ramp bottom dead angle department, this application provides a mud scraper is inhaled at no dead angle.

The application provides a mud scraper is inhaled at no dead angle adopts following technical scheme:

a mud suction and scraping machine without dead angles comprises a mud suction machine and a mud suction pipeline, wherein a pipeline expansion joint is arranged between the mud suction machine and the mud suction pipeline and comprises an inner pipe and an outer pipe, the outer pipe is sleeved on the inner pipe in a sleeving manner, the outer pipe is connected with the inner pipe in a sliding manner, one end, far away from the inner pipe, of the outer pipe is communicated with the mud suction machine, one end, far away from the outer pipe, of the inner pipe is communicated with the mud suction pipeline, and one end, far away from the mud suction machine, of the mud suction pipeline is fixedly communicated with a mud scraping plate; the mud suction machine is provided with a pipeline sleeve body, a pipeline expansion joint for enabling the pipeline sleeve body to be close to or far away from the bottom of the pond is arranged between the pipeline sleeve body and the mud suction machine, and the mud suction pipeline is fixed inside the pipeline sleeve body and the sleeve expansion joint.

Through adopting above-mentioned technical scheme, the adjustable height of inhaling the mud pipeline of pipeline expansion joint drives set body expansion joint simultaneously and stretches out and draws back to can stabilize the sludge discharge and ensure that mud can be along with inhaling mud pipeline discharge cell body bottom, can reach the clearance to the sedimentation tank die point department through stretching out and drawing back simultaneously.

Optionally, the sleeve expansion joint comprises a sleeve, one end of the sleeve, which is close to the suction dredge, is fixedly connected with the suction dredge, a sliding groove with a vertically downward opening is formed in the inner part of the wall of the sleeve, the sliding groove is formed along the circumference of the wall of the sleeve, and the pipeline sleeve is clamped in the sliding groove and is in sliding connection with the sleeve.

Through adopting above-mentioned technical scheme, the cover body telescopic joint can be according to the height of mud scraper in the thickness of sedimentation tank is adjusted, drives the pipeline cover body simultaneously and stretches out and draws back, has guaranteed overall stability.

Optionally, a plurality of springs are arranged on the sleeve expansion joint, the springs are arranged perpendicular to the bottom of the tank and located in the sliding grooves, the springs are arranged along the circumference of the wall of the sleeve, one ends of the springs are fixedly connected with the bottom of the sliding grooves, the other ends of the springs are fixedly connected with the end face of the pipeline sleeve, when the mud scraper is located at the top end of the sedimentation tank ramp, the springs are in a compressed state, and when the mud scraper is located at the bottom end of the sedimentation tank ramp, the springs are in a relaxed state.

By adopting the technical scheme, when the sludge suction and scraping machine is installed in the sedimentation tank and is started to work, the telescopic pressure can be automatically adjusted by the spring according to the sludge content in the tank body, so that the telescopic length of the sleeve telescopic joint can be adjusted.

Optionally, the inner wall of the outer pipe is provided with two sliding clamping grooves for enabling the inner pipe and the outer pipe to slide mutually, the sliding clamping grooves are arranged in the direction perpendicular to the bottom of the pool, and the two sliding clamping grooves are symmetrically distributed by taking the center line of the outer pipe as a symmetry axis.

Through adopting above-mentioned technical scheme, the slip draw-in groove makes outer tube and inner tube slip inlay card connect, restricts the slip direction of inner tube and outer tube simultaneously, has reduced the condition emergence that inner tube and outer tube separation break away from.

Optionally, a plurality of pipe hoops are fixed inside the pipe sleeve body and the sleeve, and the inner walls of the pipe hoops are connected with the outer wall of the mud suction pipe close to the pipe hoops in an embedded manner.

By adopting the technical scheme, the pipe hoop can play a stable role on the mud suction pipeline positioned in the pipeline sleeve body and the sleeve body telescopic joint, and the friction and the collision of the pipeline sleeve body and the sleeve body telescopic joint on the mud suction pipeline are reduced.

Optionally, two supporting rods are arranged on the sleeve telescopic joint, the supporting rods are symmetrically distributed on two sides of the sleeve telescopic joint along the length direction of the sleeve telescopic joint as symmetrical axes, one end of each supporting rod is fixedly connected with the outer wall of the sleeve telescopic joint, and the other end of each supporting rod penetrates through the side wall, close to the bottom of the pond, of the sludge suction machine and is fixedly connected with the side wall, far away from the bottom of the pond, of the sludge suction machine.

By adopting the technical scheme, the supporting rod plays a stabilizing role on the upper sleeve body, simultaneously disperses the load from the horizontal direction and reduces the stress and abrasion condition of the upper sleeve body.

Optionally, the mud suction pipeline is provided with an elastic support, the elastic support comprises a lantern ring, a support rod, a support spring and a support cylinder, the lantern ring is sleeved on the outer wall of the mud suction pipeline close to the lantern ring, the opening of the support cylinder is downward arranged and is close to one end of the mud suction machine and fixedly connected with the inner wall of the mud suction machine, the support rod is positioned between the support cylinder and the lantern ring, one end of the support rod is fixedly connected with the outer wall of the lantern ring, the other end of the support rod is sleeved with the opening of the support cylinder and is slidably connected with the support cylinder, the support spring is positioned in the support cylinder, one end of the support spring is fixedly connected with the horizontal inner wall of the support cylinder, and the other end of the support rod is close to the end face of the support cylinder.

Through adopting above-mentioned technical scheme, elastic support can play the supporting role to inhaling the mud pipeline, has restricted the flexible length of inhaling mud pipeline in perpendicular ground direction of horizontal department of buckling simultaneously.

Optionally, a plurality of mud suction nozzles are arranged in the mud scraper, and the mud suction nozzles are distributed in an array manner along a direction which is vertical to the direction of the straight-through track along the horizontal direction; the inside several shunt tubes that still is provided with of mud scraping plate, and the shunt tubes all with inhale the mud mouth one-to-one, and shunt tubes one end is parallelly connected and with inhale the fixed intercommunication of mud pipeline, the other end respectively with inhale the fixed intercommunication of mud mouth.

Through adopting above-mentioned technical scheme, a plurality of suction nozzles pass through the shunt tubes intercommunication and inhale the mud pipeline, and at the suction dredge during operation, can increase and inhale the mud area, improved the work efficiency who inhales the mud operation.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the height of the mud scraper can be adjusted, so that dead corners of the sedimentation tank can be cleaned. The sludge is prevented from being cleaned by adopting a manual flushing method when the sludge is not completely discharged or the tank is stopped (emptied) due to the failure of equipment, the sludge discharge efficiency is improved, the labor force is saved and the labor intensity is reduced;

2. the abrasion of the bottom of the sedimentation tank on the mud scraping plate is reduced;

3. the overall structure is more stable.

Drawings

FIG. 1 is a schematic structural view of the present embodiment;

FIG. 2 is a sectional view of the present embodiment;

FIG. 3 is an exploded view of a highlighted conduit expansion joint;

FIG. 4 is an exploded view showing the extension joint and the pipe sleeve;

FIG. 5 is an exploded view of the spring support highlighted;

figure 6 is a schematic view highlighting the shunt tube and suction nozzle.

In the figure, 1, a suction dredge; 11. a mud suction frame body; 12. a dredge pump; 13. a suction dredge roller; 14. a suction dredge pipeline; 2. a pipe expansion joint; 21. an outer tube; 22. an inner tube; 23. a sliding clamping groove; 3. a mud suction pipeline; 31. a shunt tube; 32. a mud suction nozzle; 4. a pipe sleeve body; 5. a sleeve expansion joint; 51. a sleeve; 52. a sliding groove; 53. a spring; 6. a pipe hoop; 7. elastic support; 71. a collar; 72. a support bar; 73. a support spring; 74. a support cylinder; 8. a mud scraper; 81. a scraper roller; 9. a support rod.

Detailed Description

The present application is described in further detail below with reference to figures 1-6.

The embodiment of the application discloses mud scraper is inhaled at no dead angle.

Referring to fig. 1 and 2, the mud suction device comprises a mud suction machine 1, a pipeline expansion joint 2, a mud suction pipeline 3, a pipeline sleeve body 4, a sleeve body expansion joint 5 and a mud scraping plate 8, wherein the mud suction machine 1 slides on a straight-through rail above a sedimentation tank, the mud suction pipeline 3 is positioned below the mud suction machine 1, one end of the pipeline expansion joint 2 is communicated with the mud suction machine 1, and the other end of the pipeline expansion joint is communicated with the mud suction pipeline 3. The pipeline sleeve body 4 is positioned below the suction dredge 1, one end of the sleeve body telescopic joint 5 is fixedly connected with the suction dredge 1, and the other end of the sleeve body is communicated with the pipeline sleeve body 4. The mud scraping plate 8 is positioned on the slope way at the bottom of the sedimentation tank, the upper part of the mud scraping plate 8 is fixedly connected with the pipeline sleeve body 4, and meanwhile, the joint of the mud scraping plate 8 and the pipeline sleeve body 4 is fixedly communicated with one end, far away from the mud suction machine 1, of the mud suction pipeline 3.

Referring to fig. 1 and 2, the suction dredge 1 includes a dredge pumping frame 11, a dredge pump 12, dredge pumping rollers 13 and a dredge pumping pipeline 14, the dredge pumping frame 11 is a hollow cube, the dredge pumping frame 11 is located above a straight-through rail of a sedimentation tank, two sets of dredge pumping rollers 13 are fixed inside the dredge pumping frame 11, each set of dredge pumping rollers 13 is symmetrically arranged along the length direction of the straight-through rail, and each set of dredge pumping rollers 13 is distributed in an array manner along the length direction of the straight-through rail, and the dredge pumping rollers 13 all penetrate through the side wall of the bottom of the dredge pumping frame 11 and slide on the straight-through rail. The suction dredge pump 12 is fixed above the suction dredge frame body 11, the suction dredge pipeline 14 is positioned between the suction dredge 1 and the pipeline expansion joint 2, one end of the suction dredge is fixedly communicated with the suction dredge 1 through a flange, and the other end of the suction dredge is fixedly communicated with the pipeline expansion joint 2 through a flange.

Referring to fig. 2 and 3, the pipe expansion joint 2 includes an inner pipe 22 and an outer pipe 21, the outer pipe 21 and the inner pipe 22 are straight pipes, the outer pipe 21 is sleeved on the inner pipe 22, and an end surface of the outer pipe 21 far away from the inner pipe 22 is fixedly communicated with the dredge pipeline 14 through a flange. The inner wall of the outer tube 21 is provided with two sliding clamping grooves 23 along the direction vertical to the ground, the sliding clamping grooves 23 are symmetrically distributed along the diameter of the hole wall of the outer tube 21, the inner tube 22 is provided with a strip-shaped sliding shaft corresponding to the sliding clamping grooves 23, and the inner tube 22 is connected with the outer tube 21 in a sliding clamping and embedding manner.

Referring to fig. 1 and 2, the pipe sleeve 4 is perpendicular to the sedimentation tank, and the sludge suction pipe 3 is fixed inside the pipe sleeve 4 and the sleeve expansion joint 5 and arranged along the direction of the pipe sleeve 4. Inhale 3 one ends of mud pipe and run through mud suction machine 1 and press close to the lateral wall of bottom of the pool and buckle, inhale terminal surface and the terminal surface that outer tube 21 was kept away from to mud pipe 3 after buckling and inner tube 22 and pass through the fixed intercommunication of flange.

Referring to fig. 2 and 4, the sleeve expansion joint 5 includes a sleeve 51, the sleeve 51 is a cylindrical barrel with a downward opening, the sleeve 51 is sleeved on the mud suction pipe 3, a sliding groove 52 with a vertical downward opening is formed in the pipe wall of the sleeve 51 close to the mud suction machine 1, the sliding groove 52 is circumferentially arranged along the pipe wall of the sleeve 51, and the pipe sleeve 4 is inserted into the sliding groove 52 and then slidably connected with the sleeve 51. A plurality of springs 53 are arranged in the sliding groove 52, the springs 53 are arranged along the direction perpendicular to the bottom of the pool, and the springs 53 are circumferentially arrayed along the sliding groove 52. One end of each spring 53 is fixedly connected with the bottom of the sliding groove 52, and the other end of each spring is fixedly connected with the end face of one end of the pipe sleeve body 4 penetrating into the sliding groove 52.

Referring to fig. 1, the pipe sleeve body 4 is a cylindrical pipe, a plurality of pipe hoops 6 are arranged inside the pipe sleeve body 4 and the sleeve 51, only 3 pipe hoops are shown in this embodiment as an illustration, the pipe hoops 6 are C-shaped buckles with bases, the bases of the pipe hoops 6 in the pipe sleeve body 4 are fixed with the inner wall ring sleeve of the pipe sleeve body 4, the bases of the pipe hoops 6 in the sleeve 51 are fixed with the inner wall ring sleeve of the sleeve 51, and the C-shaped buckles of the pipe hoops 6 are all connected with the mud suction pipe 3 in an embedded manner.

Referring to fig. 1, two L-shaped supporting rods 9 are arranged on the outer wall of the sleeve telescopic joint 5, the supporting rods 9 are symmetrically distributed on two sides of the sleeve telescopic joint 5 by taking the length direction of the sleeve telescopic joint 5 as a symmetry axis, one end of each supporting rod 9 is perpendicular to the ground and penetrates through the side wall of the bottom of the suction dredge 1, and is fixedly connected with the side wall of the top of the suction dredge 1, and the other end of each supporting rod is horizontal to the ground and is fixedly connected with the outer wall of the sleeve telescopic joint 5.

Referring to fig. 2 and 5, the mud suction pipe 3 is provided with an elastic support 7, the elastic support 7 includes a sleeve ring 71, a support rod 72, a support spring 73 and a support cylinder 74, the sleeve ring 71 is fixed on the bent horizontal outer wall of the mud suction pipe 3 in a ring sleeve manner, the support cylinder 74 is a cylinder with an opening facing downward vertically, the non-open end face of the support cylinder 74 is fixedly connected with the bottom side wall of the mud suction machine 1, the opening of the support cylinder 74 corresponds to the position of the outer wall of the sleeve ring 71, the support rod 72 is a round rod, one end of the round rod is fixed on the outer wall of the sleeve ring 71, the other end of the round rod is sleeved in the support cylinder 74 in a ring manner and slides in the support cylinder 74, the support spring 73 is arranged in the opening of the support cylinder 74 vertically, one end of the round rod is fixedly connected with the horizontal inner wall of the support cylinder 74, and the other end of the round rod is fixedly connected with the end face of the support rod 72 sliding in the support cylinder 74.

Referring to fig. 2 and 6, the mud scraper 8 is a downward-opening cube, the side wall of the bottom of the mud scraper 8 is inclined, the inclination direction is the same as the inclination direction of the slope at the bottom of the pool, a mud suction nozzle 32 and a shunt pipe 31 are arranged on the mud suction pipeline 3, a plurality of shunt pipes 31 and mud suction nozzles 32 are arranged, and only 3 are drawn as an illustration in this embodiment. The mud suction nozzles 32 are in the shape of inverted funnels, and the mud suction nozzles 32 are all positioned inside the mud scraping plate 8 and are arranged in an array along the direction vertical to the action direction of the mud suction machine 1 on the same horizontal plane. One end of the shunt pipe 31 is fixedly communicated with the end face, far away from the bottom of the tank, of the sludge suction nozzle 32, and the other end of the shunt pipe is fixedly communicated with the end face, close to the bottom of the tank, of the sludge suction pipeline 3 after being connected in parallel. The inside two sets of mud scraper gyro wheels 81 that are provided with of mud scraper 8, every group mud scraper gyro wheel 81 symmetry sets up at the inside both ends of mud scraper, and the symmetry axis moves towards the setting along straight-through track length, and 8 gyro wheels fixed connection of every group mud scraper are at the both ends of an axis of rotation, and the axis of rotation is connected with 8 bottom lateral walls of mud scraper rotate, and 8 gyro wheels of each group mud scraper all move towards array distribution along straight-through track length.

The implementation principle of the mud scraper is inhaled at no dead angle of this application embodiment does: when the suction dredge 1 is started to work, the suction dredge 1 slides on the straight-through slide rail and drives the mud scraping plate 8, the mud suction pipeline 3 and the pipeline sleeve body 4 to move simultaneously. Due to the difference of the lengths of the ramps at the bottom of the pond, when the suction dredge 1 is arranged at the top end of the ramp, the pipeline expansion joint 2, the sleeve body expansion joint 5 and the elastic support 7 are all in a compressed state, and the spring 53 in the sleeve body expansion joint 5 and the support spring 73 in the elastic support 7 are all in a compressed state. When the suction dredge 1 continues to move forward, because the ramp is opened downwards, the spring 53 and the supporting spring 73 are relaxed, so that the sleeve expansion joint 5 and the elastic support 7 drive the pipeline expansion joint 2 to extend, thereby driving the pipeline sleeve 4, the mud scraping plate 8 and the mud suction pipeline 3 to extend downwards, and enabling the mud scraping plate 8 to continue to be close to the sedimentation tank ramp for operation.

The embodiments of the present invention are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (8)

1. The utility model provides a mud scraper is inhaled at no dead angle which characterized in that: the mud suction device comprises a mud suction machine (1) and a mud suction pipeline (3), wherein a pipeline expansion joint (2) is arranged between the mud suction machine (1) and the mud suction pipeline (3), the pipeline expansion joint (2) comprises an inner pipe (22) and an outer pipe (21), the outer pipe (21) is sleeved on the inner pipe (22), the outer pipe (21) is connected with the inner pipe (22) in a sliding manner, one end, away from the inner pipe (22), of the outer pipe (21) is communicated with the mud suction machine (1), one end, away from the outer pipe (21), of the inner pipe (22) is communicated with the mud suction pipeline (3), and one end, away from the mud suction machine (1), of the mud suction pipeline (3) is fixedly communicated with a mud scraper (8); the mud suction machine (1) is provided with a pipeline sleeve body (4), a sleeve body telescopic joint (5) for enabling the pipeline sleeve body (4) to be close to or far away from the bottom of the pond is arranged between the pipeline sleeve body (4) and the mud suction machine (1), and the mud suction pipeline (3) is fixed inside the pipeline sleeve body (4) and the sleeve body telescopic joint (5).

2. The suction mud scraper without dead angle as claimed in claim 1, wherein: the sleeve expansion joint (5) comprises a sleeve (51), one end, close to the mud suction machine (1), of the sleeve (51) is fixedly connected with the mud suction machine (1), a sliding groove (52) with a vertical downward opening is formed in the inner portion of the wall of the sleeve (51), the sliding groove (52) is arranged along the circumference of the wall of the sleeve (51), and the pipeline sleeve body (4) is clamped in the sliding groove (52) and is in sliding connection with the sleeve (51).

3. The suction mud scraper without dead angle as claimed in claim 2, wherein: still include several spring (53) on cover body telescopic joint (5), the perpendicular bottom of the pool setting of spring (53), and spring (53) are located sliding tray (52), spring (53) set up along sleeve (51) pore wall circumference, spring (53) one end and sliding tray (52) tank bottom fixed connection, the other end and the pipe sleeve body (4) terminal surface fixed connection, when mud scraping plate (8) are located sedimentation tank ramp top position, spring (53) are in compression state, when mud scraping plate (8) are located sedimentation tank ramp bottom, spring (53) are in the state of relaxing.

4. The suction mud scraper without dead angle as claimed in claim 1, wherein: the inner wall of the outer pipe (21) is provided with two sliding clamping grooves (23) which are used for enabling the inner pipe (22) and the outer pipe (21) to slide mutually, the sliding clamping grooves (23) are arranged along the direction perpendicular to the bottom of the pool, and the central lines of the outer pipes (21) are symmetrically distributed along the symmetry axis of the two sliding clamping grooves (23).

5. The suction mud scraper without dead angle as claimed in claim 1, wherein: the pipeline sleeve body (4) and the sleeve (51) are internally fixed with a plurality of pipe hoops (6), and the inner walls of the pipe hoops (6) are connected with the outer wall of the mud suction pipeline (3) close to the pipe hoops in a clamping and embedding manner.

6. The suction mud scraper without dead angle as claimed in claim 2, wherein: the sleeve body telescopic joint is characterized in that two supporting rods (9) are arranged on the sleeve body telescopic joint (5), the supporting rods (9) are symmetrically distributed on two sides of the sleeve body telescopic joint (5) along the length direction of the sleeve body telescopic joint (5) in a symmetrical axis mode, one end of each supporting rod (9) is fixedly connected with the outer wall of the sleeve body telescopic joint (5), and the other end of each supporting rod penetrates through the side wall, close to the bottom of the pond, of the mud suction machine (1) and is fixedly connected with the side wall, far away from the bottom of the pond, of the mud suction machine (1).

7. The suction mud scraper without dead angle as claimed in claim 1, wherein: inhale and be provided with elastic support (7) on mud pipe way (3), elastic support (7) are including the lantern ring (71), bracing piece (72), supporting spring (73) and support tube (74), lantern ring (71) ring cover is fixed in on the mud pipe way (3) outer wall of inhaling that is close to, support tube (74) opening sets up downwards and is pressed close to the one end and the suction dredge (1) inner wall fixed connection of suction dredge (1), bracing piece (72) are located between support tube (74) and lantern ring (71), and bracing piece (72) one end and lantern ring (71) outer wall fixed connection, the other end is pressed close to the terminal surface fixed connection of support tube (74) by support tube (74) opening ring cover and with support tube (74) sliding connection, supporting spring (73) are located inside support tube (74), and supporting spring (73) one end and support tube (74) horizontal inner wall fixed connection, the other end and bracing piece (72) press close to the terminal surface fixed connection of support tube (74).

8. The suction mud scraper without dead angle as claimed in claim 1, wherein: a plurality of sludge suction nozzles (32) are arranged in the sludge scraping plate (8), and the sludge suction nozzles (32) are distributed in an array manner along the direction vertical to the trend of the straight-through track along the horizontal direction; the mud scraper (8) is internally provided with a plurality of shunt tubes (31), the shunt tubes (31) are in one-to-one correspondence with the mud suction nozzles (32), one ends of the shunt tubes (31) are connected in parallel and fixedly communicated with the mud suction pipeline (3), and the other ends of the shunt tubes are fixedly communicated with the mud suction nozzles (32) respectively.

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