CN113153757A

CN113153757A - Sewage pump

Info

Publication number: CN113153757A
Application number: CN202110431144.2A
Authority: CN
Inventors: 韩景忠; 王海杰; 张明伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-04-21
Filing date: 2021-04-21
Publication date: 2021-07-23

Abstract

The invention belongs to the technical field of sewage pumps, and discloses a sewage pump which comprises a water pump and a crushing unit; the crushing unit is positioned at the water pump inlet of the water pump and is used for crushing impurities of a medium flowing to the water pump inlet; a crushing unit including a crushing pipe, a crushing roller, and a driver; the inlet end of the crushing pipeline is communicated with a medium to be conveyed, and the outlet end of the crushing pipeline is communicated with the inlet of the water pump; the crushing roller is connected with the driver and is positioned inside the crushing pipeline, and the driver can drive the crushing roller to rotate inside the crushing pipeline; the outer surface of the crushing roller is provided with a crushing blade, and the end part of the crushing blade is in clearance fit with the inner wall of the crushing pipeline so as to form a channel for the medium to flow to the downstream through the crushing roller. The sewage pump can physically crush impurities in sewage flowing to the water pump, so that the granularity of the impurities is reduced, the protection of the sewage pump is improved, and the sewage pumping efficiency of the whole sewage pump is improved.

Description

Sewage pump

Technical Field

The invention belongs to the technical field of sewage pumps, and particularly relates to a sewage pump.

Background

The sewage pump belongs to one of centrifugal foreign matter pumps, and has various forms such as a submersible type and a dry type, which are mainly used for transporting municipal sewage or a medium containing solid particles such as fibers, paper dust, and the like.

In the actual operation process of pumping sewage at current dredge pump, the following problem often appears: because the in-process that current dredge pump carried out direct extraction to sewage, because there is the great impurity of a large amount of volumes in the sewage, not only lead to the dredge pump to draw the in-process to take place the jam condition easily, some fibrous impurity that exist in the sewage can also form the winding to the blade of dredge pump moreover, lead to the dredge pump can not continue normal work. The circumstances all can cause very big damage to dredge pump and motor above, influences its life, from this need carry out very frequent and loaded down with trivial details mediation operation to the dredge pump moreover to whole sewage extraction efficiency has been reduced.

Disclosure of Invention

The invention provides a sewage pump, aiming at the problems existing in the sewage pumping process of the existing sewage pump. The sewage pump comprises a water pump and a crushing unit; the crushing unit is positioned at the water pump inlet of the water pump and is used for crushing impurities of a medium flowing to the water pump inlet;

the crushing unit comprises a crushing pipeline, a crushing roller and a driver; the inlet end of the crushing pipeline is communicated with a medium to be conveyed, and the outlet end of the crushing pipeline is communicated with the water pump inlet; the crushing roller is connected with the driver and is positioned inside the crushing pipeline, and the driver can drive the crushing roller to rotate inside the crushing pipeline; the outer surface of the crushing roller is provided with crushing blades, and the end parts of the crushing blades are in clearance fit with the inner wall of the crushing pipeline so as to form a channel for allowing media to flow downstream through the crushing roller.

Preferably, the crushing unit is also provided with a filter element; the filter element is positioned inside the crushing pipe and at a position downstream of the crushing roller; the filter element is provided with filter holes as a passage for media to flow through the filter element to the downstream.

Further preferably, the filter element adopts a filter cartridge structure and is rotatably connected with the crushing pipeline; the filter element is in meshing transmission connection with the crushing blade of the crushing roller through the filter hole, and the crushing roller drives the filter element to rotate; the outer surface of the filter element is in clearance fit with the inner wall of the crushing pipeline.

Further preferably, the crushing unit is also provided with a sewage discharging roller; the sewage discharge roller is positioned inside the filtering piece and is rotationally connected with the crushing pipeline; and a sewage discharge blade is arranged on the outer surface of the sewage discharge roller.

Further preferably, the blowdown roller is eccentrically arranged in the filter element, the blowdown roller is in meshing transmission connection with the filter hole of the filter element through the blowdown blade, and the filter element drives the blowdown roller to rotate.

Preferably, the dredge pump further comprises a steering unit; the steering unit is positioned between the outlet end of the crushing pipeline and the inlet of the water pump, and the steering unit is movably connected with the crushing pipeline and the water pump; the axial line of the inlet end of the crushing pipeline is not overlapped with the axial line of the water pump inlet, and the steering unit can drive the inlet end of the crushing pipeline to rotate around the axial line of the water pump inlet relatively.

Further preferably, the steering unit comprises a connecting duct; one end of the connecting pipeline is fixedly connected with the water pump inlet, the other end of the connecting pipeline is rotatably connected with the outlet end of the crushing pipeline, and the two ends of the connecting pipeline are respectively provided with an oblique opening end and a straight opening end.

Further preferably, the steering unit further comprises a transition duct and a motor assembly; the two ends of the transition pipeline are bevel end ends, and the outlet end of the crushing pipeline is bevel end; the transition pipeline is positioned between the crushing pipeline and the connecting pipeline, and two ends of the transition pipeline are respectively in rotary connection with the crushing pipeline and the connecting pipeline; the motor assembly is located in the transition duct and drives the transition duct to rotate relative to the connecting duct and the crushing duct to rotate relative to the transition duct, respectively.

Further preferably, the motor assembly comprises a steering motor, a universal joint, a first gear set and a second gear set; the first gear set is positioned between the connecting pipeline and the transition pipeline, and the second gear set is positioned between the transition pipeline and the crushing pipeline; the steering motor is a double-shaft motor, one output shaft is connected with the first gear set to drive the transition pipeline to rotate relative to the connecting pipeline, and the other output shaft is connected with the second gear set through the universal joint to drive the crushing pipeline to rotate relative to the transition pipeline.

Further preferably, the first gear set and the second gear set both adopt external gear sets; the first gear set comprises first outer teeth fixed on the outer surface of the connecting pipeline and a second outer gear connected with an output shaft in the steering motor, and the second gear set comprises third outer teeth fixed on the outer surface of the crushing pipeline and a fourth outer gear connected with the output shaft in the steering motor through the universal joint.

The sewage pump provided by the invention is adopted for sewage pumping operation, and has the following beneficial technical effects:

1. in the sewage pump, the crushing unit is arranged at the inlet of the water pump, so that impurities in sewage can be physically crushed for the first time by utilizing the clearance fit between the crushing blade on the crushing roller in the crushing unit and the inside of the crushing pipeline, the impurities in the sewage are physically crushed for the second time by utilizing the meshing transmission connection between the crushing blade in the crushing roller and the filtering hole in the filtering piece, and the impurities in the sewage are physically crushed for the third time by utilizing the inner core transmission connection between the filtering hole in the filtering piece and the sewage discharging blade in the sewage pump. Like this, not only can utilize broken unit to carry out physics broken handle to the impurity of sewage in the water pump, reduce the granularity of impurity, avoid the winding to blade in the water pump and to the damage of water pump and motor, prolong the life of dredge pump, improve the extraction efficiency of whole dredge pump to sewage, and can also carry out physics broken handle many times step by step to the impurity of sewage in the water pump, make the granularity of impurity reduce gradually, the sewage jam problem that probably causes the broken unit or take place when avoiding carrying out the jumbo size breakage to impurity, thereby guarantee the effective quick broken handle to impurity, improve the extraction sewage effect of this sewage pump.

2. In the sewage pump, the steering unit is arranged between the crushing unit and the water pump, so that the steering unit is movably connected with the crushing pipeline and the water pump inlet at the same time, and the axis of the inlet end of the crushing pipeline is arranged in a non-overlapping manner with the axis of the water pump inlet. Like this, carry out the position change for the water pump import through the entrance point of the broken pipeline of steering unit drive, just can carry out real-time position adjustment to the entrance point of broken pipeline according to the liquid level environmental change of waiting to extract sewage to guarantee that this dredge pump can last effectual extraction to sewage and handle, improve extraction efficiency and the effect to sewage.

Drawings

FIG. 1 is a schematic cross-sectional view of a dredge pump of the present embodiment;

FIG. 2 is a schematic view showing the connection among the crushing roller, the filter member and the soil discharging roller in the soil discharging pump of the embodiment;

FIG. 3 is a schematic cross-sectional view of the dredge pump of the present embodiment after being angularly rotated by the steering unit based on the position shown in FIG. 1;

fig. 4 is a schematic structural diagram of the sewage pump of the embodiment in the position of fig. 3.

Detailed Description

The technical solution of the present invention will be further described in detail with reference to the accompanying drawings and embodiments.

Referring to fig. 1 and 2, the sewage pump of the present embodiment includes a water pump 1 and a crushing unit 2. Wherein, the water pump 1 is provided with a water pump inlet 11 and a water pump outlet 12, and the water pump 1 is driven by a water pump motor 13 so as to suck sewage from the water pump inlet 11 and output the sewage from the water pump outlet 12. The crushing unit 2 is located at the upstream position of the inlet of the water pump 1 and is used for crushing the impurities in the sewage flowing to the water pump inlet 11, so that the impurities in the sewage directly flow into the water pump to damage the water pump or the motor, and the smooth and efficient operation of the whole sewage extraction process is ensured.

In the present embodiment, the crushing unit 2 comprises a crushing pipe 21, a crushing roller 22 and a driver 23. The inlet end 211 of the crushing pipe 21 is communicated with the sewage to be conveyed, and the outlet end 212 of the crushing pipe 21 is communicated with the water pump inlet 11, so that the sewage to be conveyed flows into the water pump 1 after passing through the crushing pipe 21. The crushing roller 22 is connected to the driver 23 and is located inside the crushing pipe 21, and the driver 23 drives the crushing roller 22 to rotate inside the crushing pipe 21. The crushing blades 221 are uniformly distributed on the outer surface of the crushing roller 22, and the end parts of the crushing blades 221 are in clearance fit with the inner wall of the crushing pipeline 21 so as to form a channel for sewage to flow downstream through the crushing roller 22. Wherein, the clearance dimension between broken blade and the broken pipeline can be adjusted according to the particle size that the water pump allows direct flow through impurity to the particle size of impurity in the sewage of control inflow water pump.

At this moment, the sewage that flows into the water pump will pass broken pipeline in advance, and the sewage that gets into broken pipeline need flow through from the clearance between broken blade and the broken pipeline, control the driver and drive the crushing roller and carry out the anticlockwise rotation shown in figure 1 in broken pipeline when starting the water electromechanical pump like this, thereby can carry out the physics breakage to the impurity that flows to clearance between broken blade and the broken pipeline along with the sewage, thereby reduce the granularity of impurity in the sewage, make the impurity that gets into the water pump can flow smoothly, avoid causing the winding to the water pump impeller, also reduce the damage to water pump and motor simultaneously, prolong the life of whole dredge pump, improve the efficiency that this dredge pump carries out the sewage extraction.

Wherein, in this embodiment, driving motor is selected for use to the driver to fix in the outside of broken pipeline, stretch into the inside of broken pipeline with driving motor's output shaft and smash the roller and carry out coaxial fixed connection. Similarly, in other embodiments, if the discharge capacity of the sewage pump is large, and the sewage flow passing through the crushing pipeline is large, a hydraulic motor with higher output power can be selected as a driver, so that the crushing roller can be driven to stably rotate, and the effective crushing treatment of impurities in the sewage is ensured.

In addition, a slope 213 is provided in the crushing pipe 21 of the embodiment, and the slope 213 can make the inner through-flow section of the crushing pipe 21 narrow rapidly, so that a proper flow gap is formed between the crushing blades 221 on the crushing roller 22. Likewise, in other embodiments, the inner flow channel of the crushing pipe may also be designed directly as a uniformly transitional inner surface, depending on the size of the crushing roller.

In the crushing unit 2 of the present embodiment, as shown in connection with fig. 1 and 2, there is also provided a filter element 24. The filter element 24 is in the form of a filter cartridge structure and is located inside the crushing pipe 21 at a position downstream of the crushing roller 22, while the filter element 24 is rotatably connected to the crushing pipe 21. The filtering holes 241 are uniformly distributed on the surface of the filtering element 24, and the outer surface of the filtering element 24 is in clearance fit with the inner wall of the crushing pipeline 21, so that the sewage flowing through the crushing roller 22 passes through the filtering element 21 through the filtering holes 241 and flows downstream. Meanwhile, the filtering element 24 is in meshing transmission connection with the crushing blades 221 of the crushing roller 22 through the filtering holes 241, so that the crushing roller 22 drives the filtering element 24 to rotate. Wherein, filtration pore size and the clearance dimension between filter and the broken pipeline all can adjust according to the granularity that the water pump allows direct flow through impurity, make impurity in the sewage flow to the water pump with the mode that passes the filtration pore to guarantee to filter and can carry out free rotation for broken pipeline.

At the moment, sewage and impurities which flow between the crushing roller and the filtering piece through physical crushing of the crushing roller can pass through the filtering piece through the filtering holes on the filtering piece and flow to the inlet of the water pump. If the impurity after the physical crushing of the crushing roller can not pass through the filtering hole to enter the inside of the filtering piece and is blocked in the filtering hole, the crushing roller is in transmission connection with the teeth formed between the filtering pieces in a meshing manner, the filtering pieces can be driven by the crushing roller to synchronously rotate, and the crushing blades are inserted into the filtering holes one by one, so that the secondary physical crushing is carried out on the impurity blocked in the filtering holes, the impurity after the secondary physical crushing smoothly passes through the filtering holes to flow into the inside of the filtering pieces, the normal flow of sewage caused by the blockage of the impurity between the crushing roller and the filtering pieces is avoided, and the secondary physical crushing is carried out on the impurity flowing into the water pump along with the sewage, thereby further reducing the granularity of the impurity and improving the protection of the water pump and the motor.

In this embodiment, strain a section of thick bamboo structure that can the rotation, and break the roller and strain and form the tooth meshing transmission through broken blade and filtration pore between the section of thick bamboo and be connected, thereby can carry out quick initiative broken handle to the impurity of card stifled in the filtration pore by broken blade, reach the secondary physics breakage to impurity high efficiency, reach the quick mediation effect to the filtration pore, make sewage pass fast and strain a section of thick bamboo inflow water pump, guarantee that the water pump is handled the high-efficient extraction of sewage.

However, in other embodiments, according to different design and use conditions, the filtering element may also adopt other structural forms, for example, a filter screen structure directly fixed inside the crushing pipeline is adopted, and at this time, the crushing roller and the filtering element are arranged in a spaced non-contact manner, so that when impurities in sewage cannot pass through the filtering element, the impurities between the crushing roller and the filtering element can flow to the periphery of the crushing blade along with the flow of the sewage by virtue of the sewage flow formed by the rotation of the crushing roller, and thus the crushing blade performs physical crushing on the impurities, so as to achieve secondary physical crushing treatment on the impurities.

Further, as shown in fig. 1 and 2, a blow-off roller 25 is further provided in the crushing unit 2 of the present embodiment. The pollution discharging roller 25 is rotatably fixed inside the filter element 24 of the filter cartridge structure in an eccentric arrangement mode, pollution discharging blades 251 are uniformly distributed on the outer surface of the pollution discharging roller 25, the pollution discharging roller 25 is in meshed transmission connection with filter holes close to the downstream position in the filter element 24 through the pollution discharging blades 251, and therefore the rotation of the filter element 24 drives the pollution discharging roller 25 to rotate.

At this moment, can filter the piece inside and can't flow through the filtration pore and strain the impurity of piece and carry out physics broken handle for the third time with the help of the blowdown roller inflow, can also carry out timely quick effectual broken handle to the impurity of card stifled in the filtration pore simultaneously, reach the quick mediation effect to the filtration pore to make impurity flow out the piece with littleer granularity fast and strain, along with sewage inflow water pump.

Also, in other embodiments, the blow-down roller may be concentrically arranged with the filter element in the form of a filter cartridge structure and independently controlled in rotation by means of independent drivers, depending on the design and use conditions, so that the impurities flowing into the filter element may be physically crushed for a third time. Even, when the filtering piece adopts the form of a filter screen structure, the sewage discharging roller can be rotationally fixed at the downstream position of the filtering piece in the form of a crushing roller, and active rotation control is carried out by the aid of an independent driver, so that the purpose of carrying out third physical crushing treatment on impurities in the sewage of the penetration filtering piece is achieved.

As shown in fig. 1 to 4, the sewage pump of the present embodiment is further provided with a steering unit 3. Wherein, the steering unit 3 is located between the outlet end 212 of the crushing pipeline 21 and the water pump inlet 11, and the steering unit 3 is movably connected with the crushing pipeline 21 and the water pump 1. Meanwhile, the axis of the inlet end of the crushing pipeline 21 and the axis of the water pump inlet 11 are arranged in a crossed non-overlapping mode, and the steering unit 3 can drive the inlet end of the crushing pipeline 21 to rotate around the axis of the water pump inlet 11 relatively.

Like this, broken pipeline is connected with the water pump with the help of turning to the unit, utilizes to turn to the broken pipeline of unit drive simultaneously and rotates around the axis of water pump import, just can change broken pipeline's entrance point position to can carry out real-time position adjustment to the entrance point of broken pipeline according to the environmental change of waiting to discharge sewage, for example the change of sewage liquid level height, and then guarantee that the water pump can carry out effectual suction to sewage, improve the extraction effect of this dredge pump to sewage.

Further, a section of the connecting duct 31 is provided in the steering unit 3 of the present embodiment. Wherein, connecting tube 31 is the straight tube way, but its one end is the straight mouth end, and the other end is the bevel connection end to the straight mouth end directly carries out fixed connection through the mode of bolt with water pump inlet 11, and the bevel connection end then forms rotation with the exit end 212 of broken pipeline 21 and is connected.

At the moment, the cross arrangement between the axis of the inlet end in the crushing pipeline and the axis of the inlet of the water pump can be achieved by means of the connecting pipeline with the beveled end under the condition that the crushing pipeline adopts a straight pipeline structure. Like this, can greatly reduced adopt the manufacturing cost of the broken pipeline of straight pipeline structural style, can guarantee the manufacturing accuracy of broken pipeline simultaneously, and then guarantee the installation accuracy of breaking roller, filter and blowdown roller in broken pipeline, improve the cubic to impurity in the sewage physics crushing effect step by step.

Still further, a transition duct 32 and a motor assembly 33 are provided in the steering unit 3 of the present embodiment. The transition duct 32 is also a straight duct, but both ends thereof are beveled ends. The transition duct 32 is located between the crushing duct 21 and the connecting duct 31 and forms a relative rotational connection with the crushing duct 21 and the connecting duct 31, respectively. A motor assembly 33 is then located on the transition duct 32 to drive rotation of the filtering duct 32 relative to the connecting duct 31 and rotation of the crushing duct 21 relative to the filtering duct 32, respectively.

At this moment, through set up the transition pipeline between broken pipeline and connecting tube, can increase the contained angle between broken pipeline entrance point axis and the mouth of a river import axis on the one hand, make the entrance point of broken pipeline carry out position control in wider range, further improve the work efficiency of this dredge pump, on the other hand can be used for installing motor element to the entrance point of the broken pipeline of drive carries out position control.

As shown in fig. 4, the motor assembly 33 of the present embodiment includes a steering motor 331, a universal joint 332, a first gear set 333, and a second gear set 334. Wherein the first gear set 333 is located between the connecting duct 31 and the transition duct 32, and the second gear set 334 is located between the transition duct 32 and the crushing duct 21. The steering motor 331 is a dual-shaft motor, one output shaft is connected to the first gear set 333 to drive the transition duct 32 to rotate relative to the connecting duct 31, and the other output shaft is connected to the second gear set 334 through a universal joint 332 to drive the crushing duct 21 to rotate relative to the transition duct 32.

At this time, the first gear set and the second gear set can be simultaneously driven to rotate by the aid of the double-shaft motor, so that the transition pipeline is simultaneously driven to rotate relative to the connecting pipeline and the crushing pipeline is driven to rotate relative to the transition pipeline. Therefore, the speed of adjusting the position of the inlet end of the crushing pipeline can be increased, the number of motors can be reduced, and the manufacturing cost and the control complexity of the whole sewage pump are reduced.

However, in other embodiments, the motor assembly can be designed to be a dual-motor structure, the first gear set and the second gear set are driven to rotate by two independent motors respectively, and at the moment, the outlet end of the crushing pipeline is matched to adopt an oblique structure, so that the independent rotation of the first gear set and the independent rotation of the second gear set can both achieve the purpose of adjusting the inlet end position of the crushing pipeline, and therefore, the driving control of different matching modes is carried out on the first gear set and the second gear set, a richer adjusting effect on the inlet end position of the crushing pipeline can be obtained, and the working effect and the efficiency of the sewage pump are improved to the maximum extent.

In the present embodiment, as shown in fig. 4, the first gear set 333 and the second gear set 334 both employ an external gear set. Wherein the first gear set 333 includes a first external tooth 3331 fixed to an outer surface of the connection pipe 31 and a second external gear 3332 connected to an output shaft of the steering motor 331, and the second gear set 334 includes a third external tooth 3341 fixed to an outer surface of the crushing pipe 21 and a fourth external gear 3342 connected to an output shaft of the steering motor 331 through a universal joint 332.

Like this, just can lay whole motor element in the outside of filter tube way, not only can not occupy the inside sewage passageway of flowing through of filter tube way, reduce the resistance that sewage flowed through the transition pipeline, guarantee the extraction effect of water pump, but also can avoid in the sewage miscellaneous to motor element's destruction, extension motor element's life guarantees motor element moving reliable and stable.

However, in other embodiments, the motor assembly may be transferred to the inside of the filter pipe according to different environments in which the dredge pump is used, and at this time, the steering motor and the universal joint may be protected, and the first external teeth and the second external teeth may be adjusted to have an annular gear structure.

In addition, in the embodiment, the inlet end axis of the crushing pipeline and the inlet axis of the water pump are kept in a crossed position relationship through the connecting pipeline and the transition pipeline, so that the effect of adjusting the inlet end position of the crushing pipeline is achieved. However, in the embodiment, the inlet end axis of the crushing pipeline and the inlet axis of the water pump can be kept in a non-coincident parallel position relationship by the connecting pipeline and the transition pipeline, so that the inlet end position adjusting effect of the crushing pipeline can be achieved.

Claims

1. A sewage pump is characterized by comprising a water pump and a crushing unit; the crushing unit is positioned at the water pump inlet of the water pump and is used for crushing impurities of a medium flowing to the water pump inlet;

2. The dredge pump of claim 1, where the breaking unit is further provided with a filter; the filter element is positioned inside the crushing pipe and at a position downstream of the crushing roller; the filter element is provided with filter holes as a passage for media to flow through the filter element to the downstream.

3. The dredge pump of claim 2, wherein the filter element is of a cartridge construction and is rotatably connected to the break-up pipe; the filter element is in meshing transmission connection with the crushing blade of the crushing roller through the filter hole, and the crushing roller drives the filter element to rotate; the outer surface of the filter element is in clearance fit with the inner wall of the crushing pipeline.

4. The dredge pump of claim 3, characterized in that the breaking unit is further provided with a dredge roller; the sewage discharge roller is positioned inside the filtering piece and is rotationally connected with the crushing pipeline; and a sewage discharge blade is arranged on the outer surface of the sewage discharge roller.

5. The dredge pump of claim 4, wherein the dredge roller is eccentrically disposed inside the filter member, and the dredge roller is driven to rotate by the filter member by the form of the meshed driving connection between the dredge blade and the filter hole of the filter member.

6. The dredge pump of any of claims 1-5, further comprising a diverter unit; the steering unit is positioned between the outlet end of the crushing pipeline and the inlet of the water pump, and the steering unit is movably connected with the crushing pipeline and the water pump; the axial line of the inlet end of the crushing pipeline is not overlapped with the axial line of the water pump inlet, and the steering unit can drive the inlet end of the crushing pipeline to rotate around the axial line of the water pump inlet relatively.

7. The dredge pump of claim 6, where the steering unit includes a connection pipe; one end of the connecting pipeline is fixedly connected with the water pump inlet, the other end of the connecting pipeline is rotatably connected with the outlet end of the crushing pipeline, and the two ends of the connecting pipeline are respectively provided with an oblique opening end and a straight opening end.

8. The dredge pump of claim 7, where the steering unit further comprises a transition duct and a motor assembly; the two ends of the transition pipeline are bevel end ends, and the outlet end of the crushing pipeline is bevel end; the transition pipeline is positioned between the crushing pipeline and the connecting pipeline, and two ends of the transition pipeline are respectively in rotary connection with the crushing pipeline and the connecting pipeline; the motor assembly is located in the transition duct and drives the transition duct to rotate relative to the connecting duct and the crushing duct to rotate relative to the transition duct, respectively.

9. The dredge pump of claim 8, where the motor assembly includes a steering motor, a universal joint, a first gear set, and a second gear set; the first gear set is positioned between the connecting pipeline and the transition pipeline, and the second gear set is positioned between the transition pipeline and the crushing pipeline; the steering motor is a double-shaft motor, one output shaft is connected with the first gear set to drive the transition pipeline to rotate relative to the connecting pipeline, and the other output shaft is connected with the second gear set through the universal joint to drive the crushing pipeline to rotate relative to the transition pipeline.

10. The dredge pump of claim 9, wherein the first gear set and the second gear set each employ an external gear set; the first gear set comprises first outer teeth fixed on the outer surface of the connecting pipeline and a second outer gear connected with an output shaft in the steering motor, and the second gear set comprises third outer teeth fixed on the outer surface of the crushing pipeline and a fourth outer gear connected with the output shaft in the steering motor through the universal joint.