CN108797785B - Drainage pipe dredging and dredging device - Google Patents

Abstract

The invention discloses a dredging and dredging device for a drainage pipeline, which comprises a tubular shaft for conveying high-pressure water, and a dredging system and an adjusting and positioning system which are sequentially sleeved on the tubular shaft. The dredging system comprises a spray head mechanism arranged at one end of the tubular shaft and communicated with the tubular shaft, and a plurality of tool rest mechanisms uniformly connected with the spray head mechanism through a first rotary sealing mechanism. The adjusting and positioning system can ensure that the spray head mechanism rotates along the central line of the drainage pipeline, the adjusting and positioning system comprises a positioning seat which is annularly arranged on the outer side of the tubular shaft, the positioning seat is pivotally connected with a plurality of positioning supports, the other end of each positioning support is rotatably connected with a plurality of anti-skidding pieces, and an adjusting piece capable of adjusting the inclination angle of the positioning support is arranged between each positioning support and the positioning seat. The dredging and dredging device for the drainage pipeline has an efficient dredging and dredging function, can be dredged by high-pressure water jet, can also be used for mechanical dredging of the rotation of the tool rest system, and improves the safety and efficiency of dredging and dredging.

Description

Drainage pipe dredging and dredging device

technical field

The invention relates to the field of maintenance and dredging equipment for municipal drainage pipes, in particular to a drainage pipe dredging and dredging device.

Background technique

As an important part of municipal engineering, drainage pipelines undertake the role of collection and transmission of urban domestic and industrial sewage and rainwater. Garbage and debris in the drainage pipeline will reduce the flow rate of sewage in the pipeline, and retain grease and floating matter, thereby reducing the transportation capacity of the pipeline, causing the drainage pipeline to accumulate and cause blockage. Most of the drainage pipeline systems in developed countries use large-diameter pipelines or super-large-diameter pipelines, and use rain and sewage diversion pipeline systems, which makes many foreign dredging and dredging equipment cannot be used for domestic small and medium-diameter pipelines. In addition, domestic drainage pipelines implement Confluence of rain and sewage, coupled with behaviors such as stealing and dumping, the blockage on the inner wall of the pipeline presents the characteristics of diversification and complexity.

At present, the dredging and dredging equipment and methods used in my country's drainage network mainly include: winch dredging method; hydraulic flushing method; manual removal method; high-pressure water jet dredging method. (1) Winch dredging method: This method is the most widely used pipeline dredging method in my country. Two winches are installed at two inspection wellheads, and the winches are connected by cables, and there are barriers on the cables. Pull the cables to make the barriers The blockage is moved back and forth in the pipeline to bring out the blockage, and the blocked garbage is collected to the inspection wellhead, and the blockage is removed from the inspection well by lifting buckets or suction trucks. , it is very easy to cause safety accidents. (2) Hydraulic flushing method: This method requires that the sludge in the drainage pipeline should not be too much, and the blockage is directly flushed by using a large flow of water to pass through the blockage area, but this method is easy to cause the upstream drainage pipeline to form new silt blockage. (3) Manual removal method: The staff manually dredged the inside of the pipeline with hand-held tools. This method can clean up some seriously blocked pipelines, but the space of the pipeline is narrow, and the dredging personnel cannot perform efficient dredging when they are curled up inside the pipeline, and the labor of the staff High strength, high labor cost, and great potential safety hazards. (4) High-pressure water jet dredging method: This method drives the high-pressure water pump by the special waterwheel engine, pressurizes the water in the waterwheel, and then presses it to the nozzle, and uses the nozzle to shoot water to form a unidirectional reaction thrust, which pushes the nozzle and the hose in The high-pressure water jet dredging method is suitable for pipes of various diameters, but this method can only be used for drainage pipes that are not seriously blocked, and the dredging efficiency is low.

With the continuous expansion of urban scale, the problem of blockage and siltation of drainage pipes is becoming more and more serious. Due to the diversification of clogging garbage in domestic drainage pipes, such as kitchen garbage, construction waste from construction units, concrete blocks, etc., the blockage of drainage pipes is aggravated. Both the flushing method and the high-pressure water jet dredging method cannot effectively dredging and dredging, and we can only rely on manual dredging of underground pipelines or demolition of pipelines. If we directly excavate and replace these blocked pipelines, it will be a big project, which requires coordination and cooperation of multiple departments. Moreover, the construction period is long and the cost is higher, which seriously affects the normal operation of traffic.

SUMMARY OF THE INVENTION

Purpose of the invention: The present invention provides a drainage pipeline dredging and dredging device, which can efficiently dredging and dredging the drainage pipeline, and simultaneously solves the problems of low efficiency and high cost of the existing dredging and dredging technology.

Technical solution: The dredging and dredging device of the drainage pipeline of the present invention includes a pipe shaft for conveying high-pressure water, and the pipe shaft is sequentially sleeved with a dredging system and an adjustment and positioning system.

The dredging system can scrape and cut the dirt inside the drainage pipe, and includes a nozzle mechanism arranged at one end of the pipe shaft and communicated with the pipe shaft, and several tool holder mechanisms evenly connected to the nozzle mechanism through the first rotary sealing mechanism Under the action of spraying high-pressure water, the nozzle mechanism can rotate around the pipe axis with the pipe axis as the center and drive the dredging device to advance in the drainage pipe, and simultaneously drive the first rotary sealing mechanism and the knife holder mechanism to rotate around the pipe axis, Wherein, the tool holder mechanism can be opened under the action of rotating centrifugal force.

The dredging system is rotatably connected to the front end of the pipe shaft, and the system can drive the tool holder mechanism to rotate. Under the action of centrifugal force, the tool holder mechanism is automatically opened to scrape the inner wall of the drainage pipe.

The adjustment and positioning system can ensure that the sprinkler mechanism rotates along the center line of the drainage pipe, and includes a positioning seat that is arranged around the outside of the pipe shaft. The positioning seat is pivotally connected with a number of positioning brackets, and the other end of each positioning bracket rotates. Several anti-skid pieces are connected, and an adjustment piece capable of adjusting the inclination angle of the positioning bracket is arranged between the positioning bracket and the positioning seat.

The adjustment and positioning system is fixed in the middle of the pipe shaft. This system can ensure that the sprinkler head rotates freely along the centerline of the drainage pipe. According to the different pipe diameters, the working range of the positioning bracket can be adjusted adaptively under the action of the adjustment piece, and it has a certain ability to overcome obstacles. The whole device can stably advance in the pipeline during operation.

The dredging device also includes a dredging system capable of collecting and conveying dirt, the dredging system includes a second rotary sealing mechanism that is sleeved and communicated with the pipe shaft, a screw dredging device connected to the second rotary sealing mechanism, and a conveying assembly arranged at the other end of the pipe shaft and capable of collecting and sending out the dirt output by the screw scavenger, wherein the second rotary sealing mechanism can rotate around the pipe shaft with the pipe shaft as the center under the action of jetting high-pressure water. Drive the screw dredger to rotate.

The above-mentioned dredging system, adjusting and positioning system and dredging system are sequentially connected through a pipe shaft. The high-pressure water pipe is connected to the end of the pipe shaft through a nut, and the high-pressure water is pressed from the pipe shaft directly to the nozzle mechanism. When the nozzle mechanism drives the tool holder bar to rotate, the tool holder bar is automatically opened under the action of centrifugal force, and the thicker inner wall of the drainage pipe is hardened. The hard scale is scraped and cleaned to realize the dredging of the drainage pipe. Under the action of the adjustment piece, the self-adaptive working range of the positioning bracket is adjusted, and the nozzle rotates freely along the centerline of the pipeline, ensuring that the entire device moves stably in the pipeline during operation. At the same time, the inside of the pipe shaft is also filled with high-pressure water, and the second rotary sealing mechanism drives the screw dredging device to rotate. The inlet of the screw dredging device is close to the inner wall of the pipeline, and the dirt and sludge produced by dredging are sent to the conveying component and sent out by the conveying component.

In order to realize the rotation of the spray head mechanism under the action of spraying high-pressure water, the spray head mechanism includes a spray head and a plurality of nozzles evenly arranged outside the spray head and facing the direction of the tool holder mechanism, and the nozzles are inclined relative to the rotation axis of the spray head mechanism. In addition, the nozzle is provided with a baffle plate, which is in the shape of a horn, which can reduce turbulent flow and eddy current loss, reduce the pressure loss of the nozzle, and improve the spray efficiency of the nozzle.

Among them, the spray head includes welded upper and lower covers, the deflector is welded inside the spray head, and four detachable nozzles with uniform offset are installed at the outer end, and the axis of each nozzle is clamped at 15-25° with the rotation axis of the spray head. Angle, preferably 20°, so that the water jet generated by the nozzle forms a traction force to drive the entire device to advance along the inside of the drainage pipe, while each nozzle axis and the cross section of the rotation axis maintain an included angle of 10-20°, preferably 15°, so that the nozzle generates The water jet forms a rotational torque to drive the nozzle to rotate.

In order to realize that the tool holder mechanism can rotate with the nozzle mechanism, the first rotary sealing mechanism includes a fixed sleeve fixedly connected with the pipe shaft, and the outer periphery of the fixed sleeve is connected with a first rotatable relative to the pipe shaft through several first bearings. A rotating sleeve is provided, and the fixed sleeve and the first rotating sleeve are respectively provided with a first sealing component and a second sealing component.

Specifically, the fixed sleeve is connected with the inner rings of the two tapered roller bearings with interference fit, and the inner surface of the end of the first rotating sleeve is connected with the outer rings of the two tapered roller bearings with interference fit; the sealing seat, the high-pressure seal and the sealing spring inside the fixing sleeve, and the mating surfaces of the fixing sleeve, the sealing seat and the high-pressure seal are provided with an O-ring; the second sealing assembly includes a sealing cover threadedly connected with the first rotating sleeve, and Features a felt seal.

In order to realize the opening of the tool holder mechanism under the action of centrifugal force, the tool holder mechanism includes a tool holder rod, one end of which is rotatably connected with the first rotating sleeve in the first rotary sealing mechanism, and a tool holder rod disposed at the other end of the tool holder rod. The knife block assembly, the knife holder rod is also provided with a support rod, one end of the support rod is rotatably connected with the knife block rod, and the other end is slidably connected with the first rotary sealing mechanism through a slip ring rotatably connected with it, and the support rod is Between the slip ring and the first rotary sealing mechanism, a return spring capable of restoring the tool holder mechanism is arranged, and when the centrifugal force disappears, the tool holder mechanism can be closed under the action of the return spring.

There are three groups of tool holder mechanism, each group maintains an included angle of 120°, and two rows of triangular pyramids with sharp edges are staggered and distributed on the working surface of the tool block assembly.

In order to expand the use range of the device and adapt to the requirements of dirt dredging with different hardness, the knife block assembly can be replaced with a steel brush block, and at the same time, the return spring with different elastic forces can be replaced to control the rotary cutting depth of the knife block on the knife holder rod.

The nozzle and the front end of the first rotating sleeve are fixedly connected by threads. When the nozzle drives the tool holder mechanism to rotate, the tool holder mechanism is automatically opened under the action of centrifugal force to scrape the inner wall of the drainage pipe. When the tool holder mechanism does not rotate, the tool holder rod is automatically retracted under the elastic force of the return spring.

In order to adjust the positioning mechanism to adapt to the diameter of the drainage pipe, and to ensure that the nozzle mechanism rotates freely on the axis, the positioning bracket is arc-shaped, with the opening facing outward, one end is connected with the positioning seat by bolts, and the other end is installed by a pin shaft. There are two anti-skid wheels, and every two positioning brackets are arranged opposite each other and form a group, there are three groups in total, and an included angle of 120° is maintained between each group of positioning brackets on the cross section of the pipe shaft. The six positioning brackets are respectively connected with the positioning seat through tension springs, and the positioning brackets are adjusted by the tension springs to ensure that the anti-skid wheels can adaptively fit the inner wall of the pipeline in pipelines with different diameters.

In order to realize the rotation of the second rotary sealing mechanism under the action of jetting high-pressure water, the second rotary sealing mechanism includes a second rotary sleeve connected with the pipe shaft through a plurality of second bearings, and a plurality of water jets are evenly opened on the outer periphery of the second rotary casing. Each of the water spray holes is communicated with the through hole formed by the pipe shaft through the inner ring groove formed by the second rotating sleeve, and the direction of each water spray hole is tangent to the inner periphery of the cross section of the second rotating sleeve.

Specifically, the inner surface of the front end of the second rotating sleeve is connected with the outer rings of the two deep groove ball bearings installed in parallel with an interference fit, and the inner surface of the end is connected with the outer rings of the other two deep groove ball bearings with an interference fit, and the shaft sleeve is used to connect the outer rings of the deep groove ball bearings. The outer rings of the two deep groove ball bearings are fixed, and the inner rings of the above four deep groove ball bearings are connected with the tube shaft by an interference fit. Six bolts are used at the front and rear ends of the second rotating sleeve to connect the sealed bearing cover and the end face bearing cover. .

The helical dredger is a funnel-shaped helical cavity structure, and both ends of the cavity are open, the opening with a large axial section at the front end is the inlet, and the opening with a small end face is the outlet.

The end of the pipe shaft is connected with the high-pressure water pipe through the connecting nut. When the inside of the pipe shaft is filled with high-pressure water, the water jet generated by the water spray hole forms a rotating torque to drive the screw dredger to rotate.

In order to realize the collection and output of dirt by the conveying assembly, the conveying assembly includes a fixed pulley fixed at the end of the pipe shaft, a traction rope pulled by the fixed pulley, and a transport vehicle respectively connected to both ends of the traction rope. The car can reciprocate under the pulling of the traction rope.

Specifically, the transport vehicle is provided with a traction hook and a traction buckle, the traction rope is divided into an upper traction rope and a lower traction rope, the upper traction rope is connected to the traction hook through a fixed pulley, and the lower traction rope is connected to the traction buckle.

Beneficial effects: 1. The dredging and dredging device of the drainage pipeline of the present invention has an efficient dredging and dredging function, uses high-pressure water as the driving force, and can penetrate deep into the drainage pipeline to scrape and cut the thick hardened scale on the inner wall of the pipeline. Chopping and rinsing can not only dredge high-pressure water jets, but also mechanically dredge the rotation of the knife holder system at the same time, which can effectively remove the thick hard scale on the inner wall of the drainage pipe; 2. It can be easily and effectively scraped and cut, The chopped dirt and sludge are transported to the outside of the pipeline. It is not necessary to use a lot of clean water to flush the dredged dirt and sludge from the pipeline, which greatly reduces the amount of clean water used. , improve the safety and efficiency of dredging and dredging.

Description of drawings

Fig. 1 is the structural representation of the present invention;

Fig. 2 is the sectional structure schematic diagram of the present invention;

Fig. 3 is the structural representation of dredging system in the present invention;

4 is a schematic structural diagram of the second rotary sealing mechanism of the dredging system in the present invention;

5 is a cross-sectional structural schematic diagram of the direction of each water spray hole of the adjustment positioning system in the present invention being tangent to the inner periphery of the cross section of the second rotating sleeve;

Fig. 6 is a schematic view (a) and (b) of the structure of two embodiments of the knife block assembly of the dredging system of the present invention.

Detailed ways

1 to 6 , the dredging and dredging device for a drainage pipeline according to an embodiment of the present invention includes a dredging system 2, an adjustment and positioning system 3 and a dredging system 4, and the three systems pass through one in turn for conveying high pressure The water pipe axis 1 is connected.

The dredging system 2 includes a spray head mechanism 21 disposed at the front end of the pipe shaft 1 and communicated with the pipe shaft 1 , and several tool rest mechanisms 23 evenly connected to the spray head mechanism 21 through the first rotary sealing mechanism 22 .

The spray head mechanism 21 includes a spray head 211 and a plurality of nozzles 212 evenly arranged at the outer end of the spray head 211 and facing the direction of the tool holder mechanism 23 , and a trumpet-shaped deflector 213 is arranged in the spray head 211 . The spray head 211 includes a welded upper cover 2111 and a lower cover 2112 , the deflector 213 is welded inside the spray head 211 , and four detachable nozzles 212 with uniform offset are installed at the outer end, and the axis of each nozzle 212 is related to the rotation axis of the spray head 211 . An angle of 20° is maintained, while the axis of each nozzle 212 maintains an angle of 15° to the cross-section of the axis of rotation.

The first rotary sealing mechanism 22 includes a fixed sleeve 221 fixedly connected with the pipe shaft 1, and a first rotating sleeve 222 threadedly connected with the spray head 211. The fixed sleeve 221 is connected with the inner rings of the two tapered roller bearings 223 by interference fit. The inner surface of the end of a rotating sleeve 222 is connected with the outer rings of the two tapered roller bearings 223 by interference fit; the fixed sleeve 221 and the first rotating sleeve 222 are respectively provided with a first sealing component and a second sealing component, and the first sealing component includes a device The sealing seat 2211, the high-pressure seal 2212 and the sealing spring 2213 are inside the fixing sleeve 221, and an O-ring 2214 is provided on the mating surfaces of the fixing sleeve 221, the sealing seat 2211 and the high-pressure seal 2212; The sleeve 222 is screwed to the sealing cover 2221, and is provided with a felt seal 2222.

The tool holder mechanism 23 includes a tool holder rod 231 , one end of which is rotatably connected to the first rotary sleeve 222 in the first rotary sealing mechanism 22 through a first bolt 236 , and a knife holder is connected to the other end of the tool holder rod 231 through the first bolt 236 . Block assembly 232, the tool holder rod 231 is also provided with a support rod 233, one end of the support rod 233 is rotationally connected with the tool holder rod 231 through the first bolt 236, and the other end is slidably connected with the first rotating sleeve 222 through the slip ring 234, and supports The rod 233 is rotatably connected to the slip ring 234 through the first bolt 236. Between the slip ring 234 and the first rotating sleeve 222, there is also a return spring 235 that can reset the tool holder mechanism 23. When the centrifugal force disappears, the tool holder mechanism 23 can It is closed under the action of the return spring 235 . There are three groups of the knife holder mechanism 23, and each group maintains an included angle of 120°. The working surface of the knife block assembly 232 is staggered and distributed in two rows of triangular pyramids with sharp edges. The knife block assembly 232 can be replaced with a steel brush block. It is also possible to replace the return spring 235 with different elastic force to control the rotational cutting depth of the cutter block assembly 232 on the tool post rod 231 .

The adjustment and positioning system 3 includes a positioning seat 31 arranged around the outer side of the pipe shaft 1. The positioning seat 31 is pivotally connected with six arc-shaped positioning brackets 32 with openings facing outward through a first bolt 236, and the other end of each positioning bracket 32 is connected by a pin. The shaft 35 is rotatably connected with two anti-skid wheels 33 , the positioning seat 31 is provided with a protrusion, and a tension spring 34 capable of adjusting the inclination angle of the positioning support 32 is provided between the positioning bracket 32 and the protrusion. Every two positioning brackets 32 are arranged opposite to each other and form a group, there are three groups in total, and an included angle of 120° is maintained between each group of positioning brackets 32 on the cross section of the pipe shaft 1 .

The dredging device also includes a dredging system 4, including a second rotary sealing mechanism 41 that is sleeved and communicated with the pipe shaft 1, a screw dredging device 42 connected to the second rotary sealing mechanism 41, and a terminal part of the pipe shaft 1. The conveying component 43 that can collect and send out the dirt output by the screw dredger 42, wherein the second rotary sealing mechanism 41 can rotate around the pipe shaft 1 and drive the screw dredger 42 to rotate under the action of jetting high-pressure water.

The second rotary sealing mechanism 41 includes a second rotary sleeve 411. The inner surface of the front end of the second rotary sleeve 411 is connected with the outer rings of two parallel-mounted deep groove ball bearings 414 by interference fit, and the inner surface of the end is connected with the other two deep groove ball bearings. The outer ring of 414 is connected with interference fit, and the outer ring of the two deep groove ball bearings 414 is fixed by the bushing 415. The inner ring of the four deep groove ball bearings 414 and the tube shaft 1 are connected by interference fit, and the second rotation Six second bolts 418 are used at the front and rear ends of the sleeve 411 to connect the sealed bearing cover 416 and the end face bearing cover 417 respectively. The outer periphery of the second rotating sleeve 411 is evenly provided with four water spray holes 412 . The direction 412 is tangent to the inner periphery of the cross section of the second rotating sleeve 411 .

The spiral dredger 42 has a funnel-shaped spiral cavity structure, and both ends of the cavity are open. The opening with a large axial section at the front end is the inlet, and the opening with a small end surface is the outlet.

The conveying assembly 43 includes a fixed pulley 431 fixed at the end of the pipe shaft 1, a traction rope 432 pulled by the fixed pulley 431, and a transport vehicle 433 respectively connected to both ends of the traction rope 432. The transport vehicle 433 is provided with a traction hook 4331 and a traction Buckle 4332, traction rope 432 is divided into upper traction rope 4321 and lower traction rope 4322, upper traction rope 4321 is connected to traction hook 4331 through fixed pulley 431, and lower traction rope 4322 is connected to traction buckle 4332.

The working principle of the present invention is as follows:

The high-pressure water pipe is connected to the end of the pipe shaft 1 through the connecting nut 5, and the high-pressure water is pressed from the pipe shaft 1 into the inner cavity of the nozzle 211 directly, and then ejected from the nozzle 212. When the nozzle 211 drives the knife holder rod 231 to rotate, the knife is under the action of centrifugal force. The rack rod 231 is automatically opened, and the knife block assembly 232 on the knife rack rod 231 scrapes and washes the thick hard scale on the inner wall of the drainage pipe, so as to dredge the drainage pipe.

Under the action of the tension spring 34, the positioning bracket 32 adjusts the working range adaptively, and the spray head 211 freely rotates along the centerline of the drainage pipeline, ensuring that the entire device moves stably in the pipeline during operation.

At the same time, the inside of the pipe shaft 1 is also filled with high-pressure water, and the rotational torque generated by the four water spray holes 412 drives the screw dredger 42 to rotate, and the inlet of the screw dredger 42 is close to the inner wall of the drainage pipe to send the dredging and sludge to the On the transport vehicle 433, the upper traction rope 433 is connected to the traction rope 432, and the transport vehicle 433 is pulled out of the drainage pipe through the lower traction rope 4322. After cleaning, the upper traction rope 4321 pulls the transport vehicle 433 back to the initial position through the fixed pulley 431. Continue to collect dirt and silt, and continue to work round and round to realize the dredging of drainage pipes. In order to meet the dredging requirements of different pipe diameters, different diameters of screw dredging devices 42 are selected according to the actual situation.

Claims (10)

1. A dredging and dredging device for a drainage pipeline, characterized in that it comprises a pipe shaft (1) for conveying high-pressure water, and the pipe shaft (1) is sleeved with a dredging system (2) and an adjustment positioning system ( 3), where, - the dredging system (2) can scrape and cut the dirt inside the drainage pipe, and includes a spray head mechanism (21) arranged at one end of the pipe shaft (1) and communicated with the pipe shaft (1), and a first rotary seal The mechanism (22) is evenly connected to the nozzle mechanism (21) with several tool rest mechanisms (23), the nozzle mechanism (21) can rotate relative to the pipe axis (1) under the action of spraying high-pressure water and drive the dredging The system moves forward in the drainage pipe, and drives the first rotary sealing mechanism (22) and the tool holder mechanism (23) to rotate relative to the pipe shaft (1) at the same time, wherein the tool holder mechanism (23) can be opened under the action of the rotating centrifugal force ; - the adjustment and positioning system (3) can ensure that the nozzle mechanism (21) rotates along the centerline of the drainage pipe, and includes a positioning seat (31) surrounding the outside of the pipe shaft (1), the positioning seat (31) A plurality of positioning brackets (32) are pivotally connected, the other end of each positioning bracket (32) is rotatably connected with a plurality of anti-skid pieces, and an adjustable positioning bracket (32) is provided between the positioning bracket (32) and the positioning seat (31). ) adjuster for inclination angle. 2. The dredging and dredging device for a drainage pipeline according to claim 1, characterized in that: the dredging and dredging device further comprises a dredging system (4) capable of collecting and conveying dirt, and the dredging system (4) comprises A second rotary sealing mechanism (41) that is sleeved and communicated with the pipe shaft (1), a screw cleaner (42) connected to the second rotary sealing mechanism (41), and a second rotary sealing mechanism (42) that is provided on the pipe shaft (1) The conveying assembly (43) at the other end is capable of collecting and sending out the dirt output by the screw cleaner (42), wherein the second rotary sealing mechanism (41) can rotate relative to the pipe shaft (1) under the action of jetting high-pressure water and Drive the screw cleaner (42) to rotate. 3. The dredging and dredging device for a drainage pipeline according to claim 1, characterized in that: the nozzle mechanism (21) comprises a nozzle (211) and a mechanism evenly arranged outside the nozzle (211) and facing the tool holder A plurality of nozzles (212) in the direction of (23), and the nozzles (212) are inclined relative to the rotation axis of the nozzle mechanism (21). 4. The dredging and dredging device for a drainage pipeline according to claim 3, characterized in that: the included angle between the axis of each nozzle (212) and the axis of rotation of the nozzle mechanism (21) is 15-25°, and each nozzle ( 212) The included angle between the axis and the cross section of the rotation axis is 10-20°. 5. The dredging and dredging device for drainage pipelines according to claim 1, characterized in that: the first rotary sealing mechanism (22) comprises a fixed sleeve (221) fixed to the pipe shaft (1), and the fixed The outer periphery of the sleeve (221) is connected with a first rotating sleeve (222) capable of rotating relative to the pipe shaft (1) through a plurality of first bearings, and the fixed sleeve (221) and the first rotating sleeve (222) are respectively provided with a second rotating sleeve (222). A seal assembly and a second seal assembly. 6. The dredging and dredging device for a drainage pipeline according to claim 1, wherein the tool holder mechanism (23) comprises a tool holder bar (23) whose one end is rotatably connected to the first rotary sealing mechanism (22). 231), a knife block assembly (232) provided at the other end of the knife holder rod (231), the knife holder rod (231) is further provided with a support rod (233), one end of the support rod (233) It is rotatably connected with the tool holder rod (231), and the other end is slidably connected with the first rotary sealing mechanism (22) through a slip ring (234) rotatably connected with it, and the slip ring (234) is connected with the first rotary sealing mechanism (22). ) is provided with a return spring (235) capable of restoring the tool rest mechanism (23). 7. The dredging and dredging device for a drainage pipeline according to claim 1, wherein the positioning bracket (32) is arc-shaped and has an opening facing outward. The dredging and dredging device for a drainage pipeline according to claim 2, characterized in that: the second rotary sealing mechanism (41) comprises a second rotary sleeve (41) connected to the pipe shaft (1) through a plurality of second bearings. 411), a plurality of water spray holes (412) are evenly opened on the outer periphery of the second rotating sleeve (411), and each of the spray holes (412) passes through the inner ring groove (413) opened by the second rotating sleeve (411) and the pipe. The through holes (11) opened in the shaft (1) are communicated, and the direction of each of the water spray holes (412) is tangent to the inner periphery of the cross section of the second rotating sleeve (411). 9 . The dredging and dredging device for a drainage pipeline according to claim 2 , wherein the spiral dredging device ( 42 ) has a funnel-shaped spiral cavity structure, and both ends of the cavity are open. 10 . 10. The dredging and dredging device for a drainage pipeline according to claim 2, characterized in that: the conveying assembly (43) comprises a fixed pulley (431) fixed at the end of the pipe shaft (1), and a fixed pulley (431) is provided through the fixed pulley ( 431) A traction rope (432) to be pulled, a transport vehicle (433) respectively connected to both ends of the traction rope (432), and the transport vehicle (433) can reciprocate under the pulling of the traction rope (432).

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