CN214061931U - Personnel positioning device for pipeline dredging - Google Patents

Abstract

The utility model relates to a personnel positioner is used in pipeline desilting, it establishes the fixed disk of pipeline mouth of pipe department including being used for the lid, be equipped with the desilting device on the lateral wall of fixed disk, still including being used for propping up the positioning seat of establishing on ground and being located the fixed disk both sides, install the support ring on the fixed disk lateral wall, be equipped with locating component and positioning seat fixed connection on the fixed disk, the outer rampart of support ring just is equipped with a plurality of tight subassemblies that support that are used for to tightly on the pipe inner wall along self circumference array. This application has when the clearance, does not need the effect of artifical supplementary stable fixed disk, has saved the manpower.

Description

Personnel positioning device for pipeline dredging

Technical Field

The application relates to the field of pipeline dredging, in particular to a personnel positioning device for pipeline dredging.

Background

The pipeline dredging is to dredge the pipeline, and the pipeline is kept smooth by clearing the sludge in the pipeline so as to prevent the urban waterlogging.

Chinese patent with publication number CN210917706U discloses a municipal pipeline dredging device, which comprises a fixed disk, supporting legs, an inner plate, a driving motor, a transmission shaft, a large stirring blade, a fixed shell, a fixed seat, a rotating motor and a small stirring blade, wherein a plurality of supporting legs are equidistantly arranged on the outer side of the fixed disk, a through hole is arranged in the middle of the fixed disk, the inner plate is fixed in the through hole, the driving motor is fixed on the side edge of the inner plate, the transmission shaft is fixed on an output shaft of the driving motor, the transmission shaft penetrates through the inner plate and is fixedly connected with the large stirring blade, the joint of the transmission shaft and the inner plate is rotatably connected through a bearing, a connecting column is arranged on the side wall of the fixed shell, and a handrail is connected on the connecting column; this municipal pipeline desilting device can restrict hydraulic telescoping rod through the clamp plate, prevents to rotate at the during operation, and hydraulic telescoping rod also can contract in the recess when not, can carry on spacingly through the clamp plate, is convenient for accomodate.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: when using above-mentioned pipeline dredging device, the handrail is held to the manual work, keeps the stability of fixed disk for big stirring vane smashes the silt of caking with little stirring vane, because big stirring leaf can produce very big power of shaking when smashing the silt of caking with little stirring leaf, and the power of shaking transmits to the handrail through the spliced pole easily, if the staff receives vibrations for a long time, easy hand numb, and the personnel hold the handrail for a long time and keep the stability of fixed disk, and is more hard.

SUMMERY OF THE UTILITY MODEL

In order to improve the comparatively hard problem of personnel's hand handrail, this application provides a personnel positioner is used in pipeline desilting.

The application provides a personnel positioner for pipeline desilting adopts following technical scheme:

the utility model provides a personnel positioner is used in pipeline desilting, establishes the fixed disk of pipeline mouth of pipe department including being used for the lid, be equipped with the desilting device on the lateral wall of fixed disk, still including being used for propping up establish on ground and being located the positioning seat of fixed disk both sides, install the support ring on the fixed disk lateral wall, be equipped with locating component and positioning seat fixed connection on the fixed disk, the outer rampart of support ring just is equipped with a plurality of tight subassemblies that support that are used for supporting tightly on the pipe inner wall along self circumference array.

Through adopting above-mentioned technical scheme, at first insert the desilting device and establish in the pipeline, insert the support ring simultaneously and establish in the pipeline, the mouth of pipe department at the pipeline is established to the fixed disk lid this moment, utilizes to support tight subassembly tightly to support on the pipe wall of pipeline, can fix the mouth of pipe at the pipeline with the fixed disk, recycles locating component with fixed disk and positioning seat fixed connection, has strengthened the stability fixed to the fixed disk, and then at the desilting in-process, does not need artifical supplementary stable fixed disk, has saved the manpower.

Optionally, locating component is including the first inserted block that is located the fixed disk both sides, the second inserted block that is located the support ring both sides, the positioning seat includes interconnect's horizontal seat and vertical seat, the lateral wall of horizontal seat is equipped with first slot, the lateral wall of vertical seat is equipped with the second slot, be equipped with the cavity in the fixed disk, be equipped with in the cavity and be used for driving first inserted block and insert the synchronous driving piece in first slot, the second inserted block inserts the second slot, the perisporium of fixed disk is equipped with the first opening that supplies first inserted block to pass, the lateral wall of fixed disk is equipped with the second opening that supplies the second inserted block to pass.

Through adopting above-mentioned technical scheme, utilize the first inserted block of synchronous driving piece drive to pass first opening and insert first slot in, recycle synchronous driving piece drive second inserted block and pass the second opening and insert in the second slot, and then realized the location to the fixed disk, and then do not need artifical supplementary stable fixed disk, labour saving and time saving.

Optionally, the synchronous driving member includes an electric cylinder located in the cavity, a linkage block connected with a piston rod of the electric cylinder, and wedges connected with two side walls of the linkage block in a sliding manner, two side walls of the linkage block are both provided with guide inclined planes for the wedges to slide, one of the guide inclined planes is fixed on a side wall of the first insertion block, the other guide inclined plane is fixed on a side wall of the second insertion block, and the telescopic direction of the piston rod of the electric cylinder faces towards a connection junction between the horizontal seat and the vertical seat side wall.

By adopting the technical scheme, the electric cylinder is started, the piston rod of the electric cylinder extends out to drive the linkage block to slide towards the two wedge blocks, the two wedge blocks can be pushed to be away from each other due to the arrangement of the guide inclined planes, the first insertion block can penetrate through the first opening and be inserted into the first slot, and the second insertion block can penetrate through the second opening and be inserted into the second slot, so that the fixed disc is positioned; the driving mode has simple structure and convenient operation.

Optionally, the side wall of the linkage block on the guide inclined plane is provided with a dovetail block, and the side wall of the wedge block is provided with a dovetail groove for the dovetail block to slide.

Through adopting above-mentioned technical scheme, the cooperation of forked tail piece and dovetail has realized the connection that slides between linkage piece and the voussoir, and along with the sliding of linkage piece, can promote two voussoirs and keep away from each other or be close to each other to insert first inserted block in the first slot, the second inserted block inserts in the second slot.

Optionally, the abutting assembly comprises a plurality of guide pillars arranged on the outer annular wall of the support ring, a spring sleeved on the guide pillars, a guide sleeve slidably sleeved on the guide pillars, and balls embedded at one end of the guide sleeve opposite to the guide pillars, one end of the spring is connected with the guide sleeve, the other end of the spring is connected with the outer annular wall of the support ring, the expansion direction of the spring is the same as the axial direction of the guide pillars, and the balls are abutted against the inner annular wall of the pipeline.

By adopting the technical scheme, when the support ring is required to be inserted into the pipeline, the guide sleeve slides to enable the guide sleeve to slide towards the side wall direction of the support ring, the spring is compressed at the moment so as to place the support ring into the pipeline, then the guide sleeve is released, and the guide sleeve slides towards the inner pipe wall direction of the pipeline by utilizing the elastic resetting force of the spring so as to enable the balls to tightly abut against the inner pipe wall of the pipeline, so that the fixed disc can be stably fixed at the pipe opening of the pipeline; and the spring has good shock attenuation effect, when the desilting device at the desilting in-process, can produce vibrations, utilizes the spring, can effectually cushion the absorption to the vibrational force, plays good bradyseism effect to the fixed disk, and then the fixed disk can stably prop up and establish the mouth of pipe department at the pipeline.

Optionally, the support ring is in threaded connection with the lower surface of the fixed disc.

Through adopting above-mentioned technical scheme, threaded connection between support ring and the fixed disk has realized being connected dismantled between support ring and the fixed disk, makes things convenient for personnel to change the support ring of corresponding size specification, convenient and practical according to the pipeline of different diameters.

Optionally, the lateral wall of fixed disk is equipped with the groove of accomodating that is used for holding the positioning seat, the articulated closed door that is used for the shutoff to accomodate the groove notch that is equipped with of lateral wall of fixed disk.

Through adopting above-mentioned technical scheme, accomodate the setting in groove, play the effect of accomodating to the positioning seat, when needs use the positioning seat, can leave the positioning seat in accomodating the inslot.

Optionally, the fixed disk is provided with rollers on two sides of the first opening, and the side wall of the fixed disk facing away from the dredging device is provided with a handrail.

Through adopting above-mentioned technical scheme, the setting of gyro wheel and handrail makes things convenient for personnel to promote the handrail, can remove the fixed disk to suitable position, convenient and practical.

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

1. the abutting component is abutted against the pipe wall of the pipeline, the fixed disk can be fixed at the pipe orifice of the pipeline, and the positioning component is used for fixing the fixed disk on the positioning seat, so that the stability of fixing the fixed disk is enhanced, the fixed disk can be stabilized without manual assistance in the dredging process, and the manpower is saved;

2. the electric cylinder is started to drive the linkage block to slide towards the two wedge blocks, the two wedge blocks can be pushed to be away from each other due to the arrangement of the guide inclined planes, the first insertion block can penetrate through the first opening and be inserted into the first slot, and meanwhile, the second insertion block can penetrate through the second opening and be inserted into the second slot, so that the fixed disc is positioned;

3. when the desilting device is at the desilting in-process, can produce vibrations, utilize the elasticity of spring, can effectually cushion the absorption to the shock power, play good bradyseism effect to the fixed disk, and then the fixed disk can stably prop up and establish the mouth of pipe department at the pipeline.

Drawings

Fig. 1 is a schematic overall structure diagram of a personnel positioning device for pipeline dredging according to an embodiment of the application.

Fig. 2 is a sectional view taken along line a-a of fig. 1.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a sectional view taken along line B-B in fig. 1.

Fig. 5 is an enlarged view of a portion B in fig. 4.

Description of reference numerals: 1. fixing the disc; 2. a dredging device; 21. a motor; 22. a fixed seat; 23. rotating the hole; 24. a rotating shaft; 25. a stirring blade; 3. positioning seats; 31. a horizontal base; 32. a vertical seat; 4. a support ring; 5. a positioning assembly; 51. a first insert block; 52. a second insert block; 53. a first slot; 54. a second slot; 55. a first opening; 56. a second opening; 6. a cavity; 7. a synchronous drive; 71. an electric cylinder; 72. a linkage block; 73. a wedge block; 74. a guide slope; 75. a dovetail block; 76. a dovetail groove; 8. a propping component; 81. a guide post; 82. a spring; 83. a guide sleeve; 84. a ball bearing; 9. a receiving groove; 10. a closing door; 11. a roller; 12. a handrail; 13. a ground surface; 14. a pipeline.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses personnel positioner is used in pipeline desilting. Referring to fig. 1, the positioning device includes a fixed disk 1, the cross section of the fixed disk 1 is square, a handrail 12 is arranged on the upper surface of the fixed disk 1, two side walls of the fixed disk 1 in the length direction are both provided with rollers 11, and the rollers 11 are oppositely arranged along the width direction of the fixed disk 1.

Referring to fig. 1 and 2, the lower surface of fixed disk 1 is equipped with desilting device 2, when needs are cleared up pipeline 14, place fixed disk 1 for vertical state, make gyro wheel 11 conflict ground 13, personnel hold handrail 12, promote fixed disk 1 and remove, so that move fixed disk 1 to one side of pipeline 14, place fixed disk 1 again for horizontal state, make fixed disk 1 lid locate pipeline 14's mouth of pipe department, stretch into pipeline 14 with desilting device 2 simultaneously, in order to realize the clearance to the inside silt of pipeline 14. The setting of gyro wheel 11 and handrail 12 makes things convenient for desilting device 2 both can carry out silt clearance to the pipeline 14 inside that the level set up, can carry out silt clearance, convenient and practical to the pipeline 14 inside of vertical setting again.

Referring to fig. 2, the dredging device 2 includes a motor 21, a cavity 6 for accommodating the motor 21 is arranged inside the fixed disk 1, a fixed seat 22 is arranged on the lower surface of the fixed disk 1, the length direction of the fixed seat 22 is in the same direction as the axial direction of the pipeline 14, a rotating hole 23 is arranged in the fixed seat 22, a rotating shaft 24 penetrates through the rotating hole 23, the rotating shaft 24 rotates in the rotating hole 23, the top end of the rotating shaft 24 extends into the cavity 6 and is coaxially connected with a driving shaft of the motor 21, and the bottom end of the rotating shaft 24 extends out of the bottom wall of the fixed seat 22 and is connected with a stirring blade 25; the motor 21 is started to drive the rotating shaft 24 to rotate, and the stirring blade 25 is driven to rotate, so that the sludge agglomerated in the pipeline 14 can be stirred and crushed.

Referring to fig. 2, the lower surface of the fixed disk 1 is provided with the support ring 4, the dredging device 2 is located inside the inner ring of the support ring 4, the support ring 4 is in threaded connection with the lower surface of the fixed disk 1, the support ring 4 can be fixed on the side wall of the fixed disk 1, the dredging device 2 is further inserted into the pipeline 14, the support ring 4 can be inserted into the pipeline 14, a plurality of abutting assemblies 8 are uniformly distributed on the outer ring wall of the support ring 4, the abutting assemblies 8 are used for abutting against the inner pipe wall of the pipeline 14, the stability of the fixed disk 1 is enhanced, the stability of the dredging process is improved, the fixed disk 1 is not required to be manually assisted and stabilized during dredging, and manpower is saved.

Referring to fig. 2 and 3, the tightening assembly 8 includes a plurality of guide posts 81 arrayed along the circumferential direction of the support ring 4, one ends of the guide posts 81 are connected to the outer annular wall of the support ring 4, a guide sleeve 83 is slidably sleeved on the other ends of the guide posts 81, a spring 82 is sleeved on the guide posts 81, one end of the spring 82 is connected to the outer annular wall of the support ring 4, the other end of the spring 82 is connected to the guide sleeve 83, a ball 84 is embedded in one end of the guide sleeve 83 away from the guide posts 81, and the spring 82 is used for providing a force for the guide sleeve 83 to slide towards the direction away from the side wall of the support ring 4, so that the ball 84 is tightly pressed against the inner pipe wall of the pipe 14, and the stability of fixing the fixing plate 1 is enhanced.

Spring 82 has good elastic expansion power for guide pin bushing 83 can support on the interior pipe wall of different diameter pipelines 14, convenient and practical, and spring 82 has good elastic buffer power, because dredging device 2 can produce the vibration power when clearing up silt, and conduct the vibration power to fixed disk 1 through support ring 4 on, utilize the elastic buffer power of spring 82, can effectually cushion the vibration power, cushion the vibration power of fixed disk 1.

Refer to fig. 4 and 5, the both sides that just are located fixed disk 1 on ground 13 are equipped with positioning seat 3, positioning seat 3 adopts the shaping of iron material preparation, can be stable prop up and establish on ground 13, positioning seat 3 includes interconnect's horizontal seat 31 and vertical seat 32, the axial of horizontal seat 31 and the length direction syntropy of fixed disk 1, the axial of vertical seat 32 and the direction of height syntropy of fixed disk 1, the lateral wall butt of fixed disk 1 lateral wall and vertical seat 32, the lower surface of fixed disk 1 and the upper surface butt of horizontal seat 31, it links to each other with horizontal seat 31 and vertical seat 32 respectively to be equipped with locating component 5 on the lateral wall of fixed disk 1, and then can prop up fixed disk 1 stably and establish on ground 13.

Referring to fig. 2 and 5, the side wall of the fixed disk 1 is provided with two opposite accommodating grooves 9, the two accommodating grooves 9 are respectively located at two sides of the armrest 12, the two accommodating grooves 9 are respectively used for accommodating the two positioning seats 3, and the side wall of the fixed disk 1 is hinged to a closing door 10 for closing the groove openings of the accommodating grooves 9.

Referring to fig. 4 and 5, the positioning assembly 5 includes first insertion blocks 51 located at two sides of the fixed disk 1 in the length direction, and second insertion blocks 52 located at two sides of the support ring 4, a first insertion groove 53 is formed in the upper surface of the horizontal seat 31, a second insertion groove 54 is formed in the side wall of the vertical seat 32, a first opening 55 communicated with the cavity 6 is formed in the side wall of the fixed disk 1, one end of the first insertion block 51 passes through the first opening 55 and extends into the cavity 6, a second opening 56 communicated with the cavity 6 is formed in the lower surface of the fixed disk 1, one end of the second insertion block 52 passes through the second opening 56 and extends into the cavity 6, a synchronous driving member 7 for driving the first insertion block 51 to be inserted into the first insertion groove 53 and the second insertion block 52 to be inserted into the second insertion groove 54 is arranged in the cavity 6, thereby positioning the fixed disk 1 is realized, and the dredging device 2 stably dredges the interior of the pipeline 14.

In this embodiment, first inserted block 51 and second inserted block 52 are the iron absorption piece, because positioning seat 3 is the iron material, insert when first inserted block 51 is established in first slot 53, when second inserted block 52 is established in second slot 54, first inserted block 51 adsorbs in first slot 53, second inserted block 52 adsorbs in second slot 54 simultaneously, make when not having the exogenic action, first inserted block 51 can stably insert and establish in first slot 53, and second inserted block 52 can stably insert and establish in second slot 54, improved the fixed stability to fixed disk 1.

Referring to fig. 5, the synchronous driving member 7 includes an electric cylinder 71, a cylinder body of the electric cylinder 71 is installed on an inner side wall of the cavity 6, a piston rod of the electric cylinder 71 is connected with a linkage block 72, a telescopic direction of the piston rod of the electric cylinder 71 faces a connection junction between the horizontal seat 31 and the vertical seat 32, an included angle between a central axis of the piston rod of the electric cylinder 71 and a central axis of the vertical seat 32 in a length direction is equal to an included angle between the central axis of the piston rod of the electric cylinder 71 and the central axis of the horizontal seat 31 in the length direction, and when the electric cylinder 71 is started, the linkage block 72 is driven to slide towards or away from the connection junction between the horizontal seat 31 and the vertical seat 32.

The two side walls of the linkage block 72 are connected with wedges 73 in a sliding manner, the two wedges 73 are respectively corresponding to the first insertion block 51 and the second insertion block 52 one by one, one wedge 73 is connected with the first insertion block 51, the other wedge 73 is connected with the second insertion block 52, the side wall of the linkage block 72 is provided with a guide inclined plane 74 for the wedges 73 to slide, the lower end of the guide inclined plane 74 faces to the connecting junction between the horizontal seat 31 and the vertical seat 32, further, when the linkage block 72 slides towards the direction close to the connecting junction between the horizontal seat 31 and the vertical seat 32, due to the arrangement of the guide inclined plane 74, the two wedges 73 are pushed to be away from each other, meanwhile, the first opening 55 plays guiding and limiting roles for the sliding of the first insertion block 51, and the second opening 56 plays guiding and limiting roles for the sliding of the second insertion block 52, so that the first insertion block 51 can be inserted into the first slot 53, and the second insertion block 52 can be inserted into the second slot 54, the positioning of the fixed disk 1 is achieved.

Referring to fig. 5, a dovetail block 75 is arranged on the side wall of the linkage block 72, which is located on the guide inclined plane 74, a dovetail groove 76 for sliding the dovetail block 75 is arranged on the side wall of the wedge block 73, the dovetail block 75 and the dovetail groove 76 are matched to guide and limit sliding of the linkage block 72, and therefore when the linkage block 72 slides away from a joint hinge between the horizontal seat 31 and the vertical seat 32, the two wedge blocks 73 can be driven to be close to each other, so that the first insertion block 51 can be taken out of the first insertion slot 53, and the second insertion block 52 can be taken out of the second insertion slot 54.

The implementation principle of the personnel positioning device for pipeline dredging in the embodiment of the application is as follows: firstly, the fixed disk 1 is covered at the pipe orifice of the pipeline 14, so that the lower surface of the fixed disk 1 is abutted against the upper surface of the horizontal seat 31, meanwhile, the side wall of the fixed disk 1 is abutted against the side wall of the vertical seat 32, at the moment, the dredging device 2 and the support ring 4 are inserted in the pipeline 14, meanwhile, the guide sleeve 83 is pushed to move towards the inner wall direction of the pipeline 14 by utilizing the elasticity of the spring 82, and the fixed disk 1 can be stably erected at the pipe orifice of the pipeline 14 until the ball 84 abuts against the inner pipe wall of the pipeline 14.

Then the electric cylinder 71 is started, a piston rod of the electric cylinder 71 extends out to drive the linkage block to move towards the two wedge blocks 73, so that the distance between the two wedge blocks 73 is gradually increased, the first insertion block 51 can be pushed to be inserted into the first slot 53, the second insertion block 52 is inserted into the second slot 54, the fixing of the fixed disk 1 is finally realized, the fixed disk 1 can be stabilized in a dredging process instead of manual assistance, and manpower is saved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, 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 personnel positioner is used in pipeline desilting, is including being used for the lid to establish fixed disk (1) of pipeline (14) mouth of pipe department, be equipped with desilting device (2), its characterized in that on the lateral wall of fixed disk (1): still including being used for propping up locating seat (3) of establishing on ground (13) and being located fixed disk (1) both sides, install support ring (4) on fixed disk (1) lateral wall, be equipped with locating component (5) and locating seat (3) fixed connection on fixed disk (1), the outer rampart of support ring (4) just is equipped with a plurality of tight subassemblies (8) that support that are used for supporting tightly on pipeline (14) interior pipe wall along self circumference array.

2. The personnel positioning device for dredging pipeline of claim 1, wherein: the positioning component (5) comprises first inserting blocks (51) positioned at two sides of the fixed disc (1) and second inserting blocks (52) positioned at two sides of the supporting ring (4), the positioning seat (3) comprises a horizontal seat (31) and a vertical seat (32) which are connected with each other, the side wall of the horizontal seat (31) is provided with a first slot (53), the side wall of the vertical seat (32) is provided with a second slot (54), a cavity (6) is arranged in the fixed disc (1), a synchronous driving piece (7) for driving the first inserting block (51) to be inserted into the first slot (53) and the second inserting block (52) to be inserted into the second slot (54) is arranged in the cavity (6), the peripheral wall of the fixed disc (1) is provided with a first opening (55) for the first inserting block (51) to pass through, the side wall of the fixed disc (1) is provided with a second opening (56) for the second inserting block (52) to pass through.

3. The personnel positioning device for dredging pipeline of claim 2, wherein: synchronous driving piece (7) including be located electric jar (71) in cavity (6), with linkage block (72) that the piston rod of electric jar (71) is connected, with voussoir (73) that the both sides wall of linkage block (72) slided and is connected, the both sides wall of linkage block (72) all is equipped with direction inclined plane (74) that supply voussoir (73) to slide, one of them voussoir (73) are fixed in the lateral wall of first inserted block (51), another voussoir (73) are fixed in the lateral wall of second inserted block (52), the flexible direction of the piston rod of electric jar (71) is towards the junction between horizontal seat (31) and vertical seat (32) lateral wall.

4. The personnel positioning device for dredging pipeline of claim 3, wherein: the lateral wall that linkage block (72) are located direction inclined plane (74) is equipped with dovetail block (75), the lateral wall of voussoir (73) is equipped with dovetail (76) that supplies dovetail block (75) to slide.

5. The personnel positioning device for dredging pipeline of claim 1, wherein: the abutting assembly (8) comprises a plurality of guide pillars (81) arranged on the outer annular wall of the support ring (4), a spring (82) sleeved on the guide pillars (81), a guide sleeve (83) sleeved on the guide pillars (81) in a sliding mode and balls (84) embedded in one end, back to the guide pillars (81), of the guide sleeve (83), one end of the spring (82) is connected with the guide sleeve (83), the other end of the spring (82) is connected with the outer annular wall of the support ring (4), the stretching direction of the spring (82) is the same as the axial direction of the guide pillars (81), and the balls (84) are abutted against the inner pipe wall of the pipeline (14).

6. The personnel positioning device for dredging pipeline of claim 1, wherein: the support ring (4) is in threaded connection with the lower surface of the fixed disc (1).

7. The personnel positioning device for dredging pipeline of claim 1, wherein: the lateral wall of fixed disk (1) is equipped with and is used for holding accomodating groove (9) of positioning seat (3), the lateral wall of fixed disk (1) articulates and is equipped with and is used for the shutoff to accomodate closed door (10) of groove (9) notch.

8. The personnel positioning device for dredging pipeline of claim 1, wherein: the two sides of the fixed disc (1) positioned at the first opening (55) are provided with rollers (11), and the side wall of the fixed disc (1) back to the dredging device (2) is provided with handrails (12).

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