CN113000506A

CN113000506A - Dredger for buried pipeline

Info

Publication number: CN113000506A
Application number: CN202110203430.3A
Authority: CN
Inventors: 杨芝红; 任昱龙; 刘乾嵘; 贺艳云; 李耀峰; 王立峰; 高雨
Original assignee: China Railway First Engineering Group Co Ltd; Construction and Installation Engineering Co Ltd of China Railway First Engineering Group Co Ltd
Current assignee: China Railway First Engineering Group Co Ltd; Construction and Installation Engineering Co Ltd of China Railway First Engineering Group Co Ltd
Priority date: 2021-02-23
Filing date: 2021-02-23
Publication date: 2021-06-22

Abstract

The invention discloses a buried pipeline dredging device which comprises a crushing structure, wherein a driving source structure is arranged on one side of the crushing structure, a first driving structure is fixedly installed on one side, away from the crushing structure, of the driving source structure, and a guiding structure is fixedly connected to one side, away from the driving source structure, of the first driving structure. This underground pipeline dredge, driving motor drives the rotor plate through the worm gear driving medium and rotates, and then it rotates to drive the drill bit, the drill bit can be broken to the barrier of the inside of pipeline when rotatory, in order to prevent that the barrier from influencing the normal transport of pipeline, and simultaneously, the ring plate also can drive the abrasive brick when rotatory and rotate, and the friction terminal surface of abrasive brick is the contact state with the inner wall of pipeline, can realize that the inside that the abrasive brick can the pipeline rubs, thereby further grinding is got rid of to the object of pipeline inner wall adhesion, and then the effect of cleaing away to the inside barrier of pipeline has been improved.

Description

Dredger for buried pipeline

Technical Field

The invention relates to the field of buried pipelines, in particular to a buried pipeline dredging device.

Background

A pipeline is a device for transporting a gas, liquid or fluid with solid particles, connected by pipes, pipe couplings, valves, etc. Generally, a fluid is pressurized by a blower, a compressor, a pump, a boiler, etc., and then flows from a high pressure portion to a low pressure portion of a pipe, or is transported by the pressure or gravity of the fluid itself. The use of pipelines is very widespread, mainly in water supply, drainage, heating, gas supply, long-distance oil and gas delivery, agricultural irrigation, hydraulic engineering and various industrial installations. Some of the pipes need to be buried under the ground, often referred to as buried pipes.

This application improves to prior art, and in the current work progress, buried pipeline is because the protection is not in place or maliciously destruction, gets into the concrete easily, and the material of grit class easily arouses the pipe blockage, consequently, specially proposes a buried pipeline dredge, and the primary function of dredge is exactly through the jam material clean up in the pipeline, dredge the pipeline through the pipeline under not destroying the ground condition.

Disclosure of Invention

The invention aims to provide a buried pipeline dredging device to solve the problems in the background technology.

In order to achieve the purpose, the invention provides a buried pipeline dredging device which comprises a crushing structure, wherein a driving source structure is arranged on one side of the crushing structure, a first driving structure is fixedly arranged on one side of the driving source structure, which is far away from the crushing structure, a guide structure is fixedly connected on one side of the first driving structure, which is far away from the driving source structure, a first strong spring is fixedly connected on one side of the guide structure, which is far away from the first driving structure, a third driving structure is fixedly connected on one side of the first strong spring, which is far away from the guide structure, the crushing structure comprises a circular ring plate, eight compression structures are fixedly arranged on one side of the circular ring plate, which is far away from the driving source structure, in a circular equidistant manner, a rotating plate is arranged between clamping ends of the eight compression structures, a plurality of mounting holes are arranged on one side of the rotating plate, the driving source structure comprises a cover body, the cover body is fixedly connected with the circular ring plate, a first driving motor is fixedly mounted inside the cover body, a first worm and gear transmission piece is arranged at the driving end of the first driving motor, and the first worm and gear transmission piece is fixedly connected with the rotating plate.

In a preferred embodiment, the outer wall of ring board is circular equidistance fixed mounting and has a plurality of cavity square frames, the inside fixed mounting of cavity square frame has the installation piece, one side fixed mounting of installation piece has the frame of grinding, the inner chamber fixed mounting who grinds the frame has the abrasive brick.

In a preferred embodiment, the compressing structure comprises a base plate, the base plate is connected with a sliding block matched with the base plate in a sliding manner through a slide way formed in the base plate, the bottom of the sliding block is fixedly connected with a wheel carrier, the bottom of the wheel carrier is rotatably provided with a roller, one side of the sliding block is provided with a sliding groove, one side of the base plate is rotatably provided with two rotating frame arms, one side of each rotating frame arm is provided with a slide way, and a short shaft is arranged between each sliding groove and the corresponding slide way.

In a preferred embodiment, the first driving structure and the third driving structure have the same structure, the third driving structure comprises a first circular plate, a first sliding rod is fixedly installed at the center of a circle on one side of the first circular plate, a second circular plate is fixedly connected to one end of the first sliding rod, three first hinge seats are fixedly installed on one side of the second circular plate, a rotating block is rotatably connected to the second circular plate through one hinge seat, a fixed column is fixedly connected to one end of the rotating block, a U-shaped frame is fixedly connected to one end of the fixed column, a first guide wheel is rotatably installed in an inner cavity of the U-shaped frame, a servo motor is fixedly connected to a driving end of the first guide wheel, an installation shaft is rotatably installed on the outer wall of the U-shaped frame, a first sliding sleeve is slidably installed on the outer wall of the first sliding sleeve, three sets of first convex blocks are fixedly installed on the outer wall of the first sliding, and a strong spring II is sleeved on the outer wall of the first sliding rod and positioned between the first sliding sleeve and the second circular plate.

In a preferred embodiment, the first hinge seat comprises two first square blocks, a first transverse shaft is rotatably arranged between the two first square blocks, and the first transverse shaft is fixedly connected with the rotating block.

In a preferred embodiment, the guide structure comprises a third circular plate, a third sliding rod is fixedly connected to the circle center of one side of the third circular plate, a fourth circular plate is fixedly connected to one end of the third sliding rod, a third sliding sleeve is fixedly mounted between the opposite surfaces of the third circular plate and the fourth circular plate, a third sliding sleeve is slidably mounted on the outer wall of the third sliding rod, a third strong spring is sleeved and mounted on the outer wall of the third sliding rod and positioned between the third sliding sleeve and the third circular plate, a third three-group convex block is fixedly mounted on the outer wall of the third sliding sleeve, a second three-group hinged seat is fixedly mounted on one side of the fourth circular plate, which is close to the third circular plate, a second connecting frame is rotatably mounted on the fourth circular plate through the second hinged seat, a third guide wheel is rotatably mounted in the inner cavity of the second connecting frame, two second, and a first connecting plate is rotatably arranged between the second connecting frame and the third bump.

In a preferred embodiment, the outer wall of the strong spring III is slidably provided with a second sliding sleeve, the outer wall of the second sliding sleeve is fixedly provided with two second projections, the two second projections are rotatably provided with a third connecting frame through convex shafts arranged on opposite surfaces of the second projections, and the third connecting frame is rotatably connected with the second connecting plate.

In a preferred embodiment, the second hinge seat is two second square blocks, a second transverse shaft is rotatably arranged between the two second square blocks, and the second transverse shaft is fixedly connected with the second connecting frame.

Compared with the prior art, the buried pipeline dredging device has the beneficial effects that:

1. the grinding block is capable of rubbing the inside of the pipeline, so that objects adhered to the inner wall of the pipeline are further ground and removed, and the effect of removing the obstacles in the pipeline is improved.

2. According to the invention, through the matching use of the idler wheel, the sliding block, the sliding chute, the short shaft, the rotating frame arms, the base plate, the sliding rail and the wheel carrier, the rotation of the two rotating frame arms can enable the short shaft to slide in the sliding rail, so that the short shaft can drive the sliding block to move, the movement of the idler wheel is realized, when the rotating plate needs to be installed, the rotating plate is placed between the plurality of idler wheels, then the rotating plate is clamped by the idler wheels, when the rotating plate needs to be disassembled, the idler wheels are contacted to extrude the rotating plate, so that the rotating plate can be installed and disassembled, the rotating plates with different diameters can be installed according to different pipeline diameters, meanwhile, the hollow square frame can be also replaced, the applicability of the dredger to pipelines with different sizes is improved, the installing and disassembling structure is simple, the replacing is convenient and.

3. The invention uses the first driving structure, the guiding structure, the first powerful spring, the third driving structure, the first round plate, the first sliding sleeve, the first connecting frame, the first bump, the first sliding rod, the second round plate, the first hinging seat, the rotating block, the fixed column, the U-shaped frame, the mounting shaft and the first guide wheel to cooperate with the servo motor, the servo motor drives the first guide wheel to rotate, the first guide wheel is in contact friction with the inner wall of the pipeline, thereby realizing the automatic movement of the dredger in the pipeline, further realizing the cleaning of the blocking material in the pipeline without damaging the ground, dredging the pipeline, ensuring the normal circulation in the pipeline, and the U-shaped frame is in rotary connection with the second round plate through the first hinging seat, when the diameter of the pipeline is small, the outer wall of the first guide wheel is in contact with the inner wall of the pipeline, the U-shaped frame can rotate to the first sliding rod, at the moment, the first sliding sleeve is driven to move upwards through the connecting frame, and compress powerful spring two, realize adjusting the interval between guide pulley one and the slide bar one to can realize that drive structure self-adaptation drives the pipeline between the difference, need not to switch the drive structure rather than the looks adaptation according to the pipeline diameter of difference, reduced the loaded down with trivial details degree of use, and then improved the convenience that dredge used.

4. According to the invention, through the matching use of the second projection, the second sliding sleeve, the third circular plate, the fourth circular plate, the third sliding sleeve, the second hinge seat, the third strong spring, the second sliding rod, the first connecting plate, the second connecting frame, the third guide wheel, the second connecting plate, the third connecting frame, the fourth guide wheel, the third projection and the third sliding rod, the principle of the guide structure is consistent with the distance of the driving structure, the guide structure is suitable for guiding pipelines with different sizes, and the use effect is good.

Drawings

Fig. 1 is a schematic structural view of a buried pipeline dredger according to an embodiment of the present invention;

fig. 2 is a plan view of a buried pipeline dredger according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a guide structure in a buried pipeline dredger according to an embodiment of the invention;

fig. 4 is a schematic perspective view of a circular ring plate in a buried pipeline dredger according to an embodiment of the invention;

fig. 5 is a plan side view of a circular ring plate in the buried pipeline dredger according to an embodiment of the present invention;

fig. 6 is an enlarged schematic view of a buried pipeline dredger according to an embodiment of the present invention at a position a in fig. 1;

fig. 7 is an enlarged schematic view of a buried pipeline dredger according to an embodiment of the present invention at B in fig. 1;

fig. 8 is a schematic structural view between a first driving structure and a third driving structure in a buried pipeline dredger according to an embodiment of the present invention.

Description of reference numerals: the crushing structure 1, the driving source structure 2, the first driving structure 3, the guide structure 4, the strong spring I5, the third driving structure 6, the grinding block 7, the grinding frame 8, the drill 9, the hollow square frame 10, the mounting block 11, the driving motor I12, the mounting hole 13, the rotating plate 14, the circular plate 15, the pressing structure 16, the roller 17, the sliding block 18, the sliding chute 19, the short shaft 20, the rotating frame arm 21, the base plate 22, the slideway 23, the wheel frame 24, the circular plate I25, the sliding sleeve I26, the connecting frame I27, the convex block I28, the sliding rod I29, the circular plate II 30, the hinged seat I31, the rotating block 32, the fixed column 33, the U-shaped frame 34, the mounting shaft 35, the guide wheel I36, the convex block II 37, the sliding sleeve II 38, the circular plate III 39, the circular plate IV 40, the sliding sleeve III 41, the hinged seat II 42, the strong spring III 43, the sliding rod II 44, the connecting plate I45, the, A third connecting frame 49, a fourth guide wheel 50, a third bump 51, a second strong spring 52 and a third sliding rod 53.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

Referring to fig. 1 to 8, the underground pipeline dredging device according to the preferred embodiment of the present invention includes a crushing structure 1, a driving source structure 2 is disposed on one side of the crushing structure 1, and a first driving structure 3 is fixedly mounted on one side of the driving source structure 2 away from the crushing structure 1. One side fixedly connected with guide structure 4 that first drive structure 3 kept away from driving source structure 2, one side fixedly connected with powerful spring 5 that first drive structure 3 was kept away from to guide structure 4, one side fixedly connected with third drive structure 6 that guide structure 4 was kept away from to powerful spring 5. Broken structure 1 includes ring plate 15, and one side that drive source structure 2 was kept away from to ring plate 15 is circular equidistance fixed mounting has eight compact structure 16, is provided with rotor plate 14 between eight compact structure 16's the tight end of clamp. The side of the rotating plate 14 far away from the circular ring plate 15 is circular and provided with a plurality of mounting holes 13 at equal intervals, and the rotating plate 14 is fixedly connected with a drill bit 9 through the mounting holes 13. The driving source structure 2 comprises a cover body, the cover body is fixedly connected with the circular ring plate 15, a first driving motor 12 is fixedly installed inside the cover body, a worm and gear transmission piece is arranged at the driving end of the first driving motor 12, and the worm and gear transmission piece is fixedly connected with the rotating plate 14.

Further, the outer wall of the circular ring plate 15 is a plurality of hollow square frames 10 fixedly installed at equal intervals, the inside of each hollow square frame 10 is fixedly installed with an installation block 11, one side of each installation block 11 is fixedly installed with a grinding frame 8, and the inner cavity of each grinding frame 8 is fixedly installed with a grinding block 7.

Further, the compressing structure 16 includes a base plate 22, the base plate 22 is slidably connected with a sliding block 18 adapted to the base plate through a slide way formed on the base plate 22, a wheel carrier 24 is fixedly connected to the bottom of the sliding block 18, a roller 17 is rotatably mounted at the bottom of the wheel carrier 24, and a sliding groove 19 is formed in one side of the sliding block 18. Two rotating frame arms 21 are rotatably mounted on one side of the base plate 22, a slideway 23 is formed in one side of each rotating frame arm 21, and a short shaft 20 is arranged between the sliding groove 19 and the slideway 23.

Example 2

In a preferred embodiment, the first driving structure 3 and the third driving structure 6 are identical in structure, and the third driving structure 6 comprises a first circular plate 25, and a first sliding rod 29 is fixedly installed at the center of a circle on one side of the first circular plate 25. One end of the first sliding rod 29 is fixedly connected with a second circular plate 30, one side of the second circular plate 30 is fixedly provided with a first three hinge seats 31, and the second circular plate 30 is rotatably connected with a rotating block 32 through the first hinge seats 31. One end of the rotating block 32 is fixedly connected with a fixing column 33, one end of the fixing column 33 is fixedly connected with a U-shaped frame 34, a first guide wheel 36 is rotatably installed in the inner cavity of the U-shaped frame 34, and a driving end of the first guide wheel 36 is fixedly connected with a servo motor.

Further, the outer wall of the U-shaped frame 34 is rotatably provided with a mounting shaft 35, the outer wall of the sliding rod one 29 is slidably provided with a sliding sleeve one 26, the outer wall of the sliding sleeve one 26 is fixedly provided with three sets of first protrusions 28, and a first connecting frame 27 is rotatably provided between the mounting shaft 35 and the first protrusions 28. And a strong spring II 52 is sleeved on the outer wall of the sliding rod I29 and positioned between the sliding sleeve I26 and the circular plate II 30, the hinge seat I31 comprises two square blocks I, a transverse shaft I is rotatably arranged between the two square blocks I, and the transverse shaft I is fixedly connected with the rotating block 32.

Example 3

Further, the guide structure 4 comprises a third circular plate 39, a third sliding rod 53 is fixedly connected to the center of the circle on one side of the third circular plate 39, a fourth circular plate 40 is fixedly connected to one end of the third sliding rod 53, and three sliding sleeves three 41 are fixedly installed between the opposite surfaces of the third circular plate 39 and the fourth circular plate 40. A third sliding sleeve 41 is slidably mounted on the outer wall of the third sliding rod 53, a third strong spring 43 is sleeved and mounted on the outer wall of the third sliding rod 53 and located between the third sliding sleeve 41 and the third circular plate 39, and three sets of third protruding blocks 51 are fixedly mounted on the outer wall of the third sliding sleeve 41.

Furthermore, three sets of hinge seats two 42 are fixedly mounted on one side of the circular plate four 40 close to the circular plate three 39, and the connecting frame two 46 is rotatably mounted on the circular plate four 40 through the hinge seats two 42. The inner cavity of the second connecting frame 46 is rotatably provided with a third guide wheel 47, the outer wall of the second connecting frame 46 is rotatably provided with two second connecting plates 48, and a fourth guide wheel 50 is rotatably arranged between the opposite surfaces of the two second connecting plates 48. A first connecting plate 45 is rotatably arranged between the second connecting frame 46 and the third bump 51, a second sliding sleeve 38 is slidably arranged on the outer wall of the strong spring third 43, two second bumps 37 are fixedly arranged on the outer wall of the second sliding sleeve 38, and a third connecting frame 49 is rotatably arranged on the two second bumps 37 through convex shafts arranged on opposite surfaces of the two second bumps 37. And the connecting frame III 49 is rotatably connected with the connecting plate II 48, the hinge seat II 42 is provided with two square blocks II, a transverse shaft II is rotatably arranged between the two square blocks II, and the transverse shaft II is fixedly connected with the connecting frame II 46.

Example 4

The working principle of the buried pipeline dredger of the invention is specifically described as follows:

when the underground pipeline dredging device is used, the first driving motor 12 drives the rotating plate 14 to rotate through the worm and gear transmission part, so that the drill bit 9 is driven to rotate, the drill bit 9 can crush obstacles in the pipeline while rotating, so that the obstacles are prevented from influencing the normal conveying of the pipeline, meanwhile, the annular plate 15 can drive the grinding block 7 to rotate while rotating, the friction end face of the grinding block 7 is in a contact state with the inner wall of the pipeline, so that the grinding block 7 can rub the inside of the pipeline, objects adhered to the inner wall of the pipeline can be further ground and removed, and the effect of removing the obstacles in the pipeline is improved. The rotation of the two rotating frame arms 21 can enable the short shaft 20 to slide in the slide rail 23, and further enable the short shaft 20 to drive the sliding block 18 to move, so that the rollers 17 can be moved, when the rotating plate 14 needs to be installed, the rotating plate 14 is placed among the rollers 17, then the rollers 17 are adopted to clamp the rotating plate 14, when the rotating plate 14 needs to be disassembled, the contact rollers 17 can extrude the rotating plate 14, so that the rotating plate 14 can be installed and disassembled, and the rotating plates 14 with different diameters can be installed according to different pipeline diameters. Meanwhile, the hollow square frame 10 can be assembled, disassembled and replaced, the applicability of the dredger to pipelines with different sizes is improved, and the dredger is simple in assembling and disassembling structure, convenient to replace and convenient to use. Servo motor drives guide pulley 36 and rotates, and guide pulley 36 and pipeline inner wall carry out contact friction to the realization carries out automatic movement to the inside of dredge at the pipeline, and then realizes not destroying under the ground condition, with the jam material clean up in the pipeline, dredge the pipeline, guarantee the normal circulation in the pipeline. U type frame 34 is through being connected with rotating between the two 30 of circular slab of articulated seat 31, when the pipeline diameter is little, when the outer wall of guide pulley 36 and the inner wall contact of pipeline, U type frame 34 can be rotatory to slide bar 29 department, drive sliding sleeve 26 rebound through link one 27 this moment, and compress powerful spring two 52, the realization is adjusted the interval between guide pulley 36 and slide bar 29, thereby can realize that the pipeline between the drive structure self-adaptation difference drives, need not to switch the drive structure rather than the looks adaptation according to the pipeline diameter of difference, the loaded down with trivial details degree of use has been reduced, and then the convenience that the dredge used has been improved. The principle of guide structure 4 is unanimous with keeping away from of drive structure, has also realized that guide structure 4 is applicable to not unidimensional pipeline and leads, and the result of use is good.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a buried pipeline dredge, includes broken structure (1), its characterized in that: one side of the crushing structure (1) is provided with a driving source structure (2), one side, far away from the crushing structure (1), of the driving source structure (2) is fixedly provided with a first driving structure (3), one side, far away from the driving source structure (2), of the first driving structure (3) is fixedly connected with a guide structure (4), one side, far away from the first driving structure (3), of the guide structure (4) is fixedly connected with a first strong spring (5), one side, far away from the guide structure (4), of the first strong spring (5) is fixedly connected with a third driving structure (6), the crushing structure (1) comprises a circular ring plate (15), one side, far away from the driving source structure (2), of the circular ring plate (15) is fixedly provided with eight pressing structures (16) in a circular equidistant manner, and a rotating plate (14) is arranged between clamping ends of the eight pressing structures (16), one side that the annular plate (15) was kept away from in rotor plate (14) is circular equidistance and has seted up a plurality of mounting holes (13), rotor plate (14) are through mounting hole (13) fixedly connected with drill bit (9), driving source structure (2) are including the cover body, and the cover body and annular plate (15) fixed connection, the inside fixed mounting of the cover body has driving motor (12), the drive end of driving motor (12) is provided with the turbine worm driving medium, and fixed connection between turbine worm driving medium and rotor plate (14).

2. A buried pipeline dredger according to claim 1, wherein: the outer wall of ring board (15) is circular equidistance fixed mounting and has a plurality of cavity square frame (10), the inside fixed mounting of cavity square frame (10) has installation piece (11), one side fixed mounting of installation piece (11) has mill frame (8), the inner chamber fixed mounting who grinds frame (8) has abrasive brick (7).

3. A buried pipeline dredger according to claim 1, wherein: the pressing structure (16) comprises a base plate (22), the base plate (22) is connected with a sliding block (18) matched with the base plate in a sliding mode through a slide way formed in the base plate (22), a wheel carrier (24) is fixedly connected to the bottom of the sliding block (18), a roller (17) is installed at the bottom of the wheel carrier (24) in a rotating mode, a sliding groove (19) is formed in one side of the sliding block (18), two rotating frame arms (21) are installed at one side of the base plate (22) in a rotating mode, a slide way (23) is formed in one side of each rotating frame arm (21), and a short shaft (20) is arranged between each sliding groove (19.

4. A buried pipeline dredger according to claim 1, wherein: the structure of the first driving structure (3) is consistent with that of the third driving structure (6), the third driving structure (6) comprises a first circular plate (25), a first sliding rod (29) is fixedly mounted at the circle center of one side of the first circular plate (25), a second circular plate (30) is fixedly connected with one end of the first sliding rod (29), three first hinged seats (31) are fixedly mounted at one side of the second circular plate (30), the second circular plate (30) is rotatably connected with a rotating block (32) through the first hinged seats (31), a fixed column (33) is fixedly connected with one end of the rotating block (32), a U-shaped frame (34) is fixedly connected with one end of the fixed column (33), a first guide wheel (36) is rotatably mounted in an inner cavity of the U-shaped frame (34), a servo motor is fixedly connected with a driving end of the first guide wheel (36), and a mounting shaft (35) is rotatably mounted on the outer wall of the U-shaped frame (34, the outer wall slidable mounting of slide bar (29) has sliding sleeve (26), the outer wall fixed mounting of sliding sleeve (26) has three group's lugs (28), it installs link (27) to rotate between installation axle (35) and lug (28), the outer wall of slide bar (29) just is located and has cup jointed powerful spring two (52) between sliding sleeve (26) and circular slab two (30).

5. A buried pipeline dredger according to claim 4, wherein: the first hinge seat (31) comprises two first square blocks, a first cross shaft is rotatably arranged between the first square blocks, and the first cross shaft is fixedly connected with the rotating block (32).

6. A buried pipeline dredger according to claim 1, wherein: guide structure (4) includes plectane three (39), the centre of a circle department fixedly connected with slide bar three (53) of plectane three (39) one side, the one end fixedly connected with plectane four (40) of slide bar three (53), fixedly mounted has three sliding sleeve three (41) between the opposite face of plectane three (39) and plectane four (40), the outer wall slidable mounting of slide bar three (53) has sliding sleeve three (41), the outer wall of slide bar three (53) just is located to cup joint between sliding sleeve three (41) and plectane three (39) and installs powerful spring three (43), the outer wall fixed mounting of sliding sleeve three (41) has three group lug three (51), one side fixed mounting that plectane four (40) are close to plectane three (39) has three groups of articulated seats two (42), link two (46) are installed through articulated seat two (42) rotation in plectane four (40), guide wheel three (47) is installed in the inner chamber rotation of link two (46), two connecting plate two (48) are installed in the outer wall rotation of link two (46), two rotate between the opposite face of connecting plate two (48) and install guide wheel four (50), rotate between link two (46) and lug three (51) and install connecting plate one (45).

7. A buried pipeline dredger according to claim 6, wherein: the outer wall slidable mounting of powerful spring three (43) has sliding sleeve two (38), the outer wall fixed mounting of sliding sleeve two (38) has two lugs two (37), two lugs two (37) rotate through the protruding axle that its opposite face set up and install link three (49), and rotate between link three (49) and the connecting plate two (48) and be connected.

8. A buried pipeline dredger according to claim 6, wherein: the hinge base II (42) is provided with two square blocks II, a cross shaft II is rotatably arranged between the square blocks II, and the cross shaft II is fixedly connected with the connecting frame II (46).