CN112268161B - Pneumatic non-excavation prosthetic devices that pipeline part collapses - Google Patents
Pneumatic non-excavation prosthetic devices that pipeline part collapses Download PDFInfo
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- CN112268161B CN112268161B CN202011172556.0A CN202011172556A CN112268161B CN 112268161 B CN112268161 B CN 112268161B CN 202011172556 A CN202011172556 A CN 202011172556A CN 112268161 B CN112268161 B CN 112268161B
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- wall
- side wall
- fixedly connected
- groove
- mounting groove
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/18—Appliances for use in repairing pipes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C4/00—Crushing or disintegrating by roller mills
- B02C4/02—Crushing or disintegrating by roller mills with two or more rollers
- B02C4/08—Crushing or disintegrating by roller mills with two or more rollers with co-operating corrugated or toothed crushing-rollers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G65/00—Loading or unloading
- B65G65/02—Loading or unloading machines comprising essentially a conveyor for moving the loads associated with a device for picking-up the loads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G69/00—Auxiliary measures taken, or devices used, in connection with loading or unloading
- B65G69/14—Pulverising loaded or unloaded materials
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Sewage (AREA)
Abstract
The invention discloses a pneumatic trenchless repairing device for local collapse of a pipeline, which comprises a mounting groove, wherein the inner wall of the mounting groove is fixedly connected with a protective cover, a driving motor is arranged in the protective cover, an output shaft of the driving motor penetrates through the protective cover and is fixedly connected with a rotating rod, the rotating rod penetrates through the bottom wall of the mounting groove, the side wall of the mounting groove is fixedly connected with a mounting shell, the mounting shell is of a hollow structure, the rotating rod penetrates through the inner wall of the mounting shell and is rotatably connected with the inner wall of the mounting shell, two bevel gears which are symmetrically arranged are fixedly sleeved on the rotating rod in the mounting shell, the inner wall of the lower end of the mounting shell is rotatably connected with two supporting rods, and bevel gears matched with the bevel gears are fixedly sleeved on the two supporting rods. The invention can crush soil, sundries and the like, so that the soil, the sundries and the like can be absorbed into the box body to be cleaned quickly, secondary damage to the collapse part is small, subsequent work can be carried out smoothly, and the burden of workers is reduced.
Description
Technical Field
The invention relates to the technical field, in particular to a pneumatic trenchless repairing device for local collapse of a pipeline.
Background
In recent years, with the development of economy in China, the scale of urban construction is getting larger, however, drainage pipelines in many cities in China have damage phenomena of different degrees due to various reasons such as aging of pipelines and long-term overhaul, and the ground collapse news caused by the damage of sewers is rare, so that the problems of the urban drainage and ground traffic and communication are brought, and the environment of the city and the normal living order of people are seriously influenced. Therefore, it is very important to repair the damaged pipeline in time.
Among the prior art, when restoreing the pipeline that collapses, need dig out accumulational earth, and directly adopt excavating gear, can destroy other positions of pipeline, bring very big burden for subsequent work, the earth of digging out moreover also is inconvenient to carry out, for this reason, we propose a pipeline local pneumatic non-excavation prosthetic devices that collapses and solve above-mentioned problem.
Disclosure of Invention
The invention aims to solve the problems that when the accumulated soil is excavated out in the prior art, other parts of a pipeline can be damaged by directly adopting an excavating device, great burden is brought to subsequent work, and the excavated soil is not convenient to carry out, and provides a pneumatic trenchless repairing device for local collapse of the pipeline.
In order to achieve the purpose, the invention adopts the following technical scheme:
the pneumatic trenchless repairing device for the local collapse of the pipeline comprises a mounting groove, wherein a protective cover is fixedly connected to the inner wall of the mounting groove, a driving motor is arranged in the protective cover, an output shaft of the driving motor penetrates through the protective cover and is fixedly connected with a rotating rod, the rotating rod penetrates through the bottom wall of the mounting groove, a mounting shell is fixedly connected to the side wall of the mounting groove, the mounting shell is of a hollow structure, the rotating rod penetrates through the inner wall of the mounting shell and is rotatably connected with the inner wall of the mounting shell, two bevel gears which are symmetrically arranged are fixedly sleeved on the rotating rod in the mounting shell, two supporting rods are rotatably connected to the inner wall of the lower end of the mounting shell, bevel gears matched with the bevel gears are fixedly sleeved on the two supporting rods, a containing groove is fixedly connected to the side wall of the upper end of the mounting shell, and the two supporting rods penetrate through the inner wall of the mounting shell and the side wall of the containing groove, the side wall fixedly connected with worm of branch is located accomodate the groove, branch with worm integrated into one piece, the inner wall of accomodating the groove rotates and is connected with two crushing wheels, two the equal fixedly connected with of lateral wall of crushing wheel and the worm wheel that the worm matches, the inner wall fixedly connected with box of mounting groove, the discharge gate has been seted up to the lower extreme lateral wall of box, the negative pressure pump is installed to the inner wall of mounting groove, the extraction opening sealing connection of negative pressure pump has the breathing pipe, the lateral wall sealing connection of breathing pipe and box, the lateral wall sealing connection that the breathing pipe was kept away from to the box has the drainage tube, the drainage tube runs through the inner wall and the sealing connection of mounting groove and has the dust cage, is located the mounting groove the drainage tube slope sets up, the dust cage is located the top of accomodating the groove.
Preferably, be located in the mounting groove be equipped with the hose area on the drainage tube, the hose area slope sets up, is located in the mounting groove fixed cover is equipped with the cam on the bull stick, the diapire fixedly connected with fixed plate of mounting groove, the diapire sliding connection of mounting groove has the sliding plate, the lateral wall of sliding plate passes through the lateral wall fixed connection of reset spring and fixed plate, the lateral wall of sliding plate offsets with the lateral wall of cam, the lateral wall fixedly connected with push rod of sliding plate, reset spring overlaps on the push rod, the push rod runs through the lateral wall fixedly connected with fly leaf of fixed plate, the upper end lateral wall of fly leaf is connected with the lateral wall joint in hose area.
Preferably, the lateral wall joint of box is connected with the ventilated membrane that matches with the breathing pipe, the inner wall of box is equipped with the smooth layer, and the lower extreme inner wall slope of box sets up.
Preferably, the inner wall fixedly connected with mounting bracket of mounting groove, the lateral wall fixedly connected with servo motor of mounting bracket, it is connected with a plurality of driving rollers to rotate between the both sides inner wall of mounting bracket, servo motor's output shaft and one of them the lateral wall fixed connection of driving roller, it is a plurality of be equipped with the conveyer belt between the driving roller, the conveyer belt is rubber conveyer belt, the one end of conveyer belt is located the box under, the equal fixedly connected with baffle of the both sides inner wall of mounting groove, the lateral wall of baffle offsets with the lateral wall of conveyer belt.
Preferably, the upper end lateral wall fixedly connected with a plurality of damping springs of mounting bracket, it is a plurality of fixedly connected with same backup pad between damping spring's the upper end lateral wall, the upper end lateral wall of backup pad is equipped with a plurality of backing rolls, and is a plurality of the backing roll offsets with the inner wall of conveyer belt.
Preferably, the upper end lateral wall fixedly connected with of mounting groove holds the pole, the one end parcel that the mounting groove was kept away from to the pole of holding has the rubber pad.
Preferably, the side wall of the lower end of the mounting groove is provided with a detachable material receiving hopper, the side wall of the mounting groove is fixedly connected with an inclined material guide plate, and the material guide plate extends into the material receiving hopper.
Preferably, the lower extreme lateral wall of mounting groove rotates and is connected with a plurality of landing legs, and is a plurality of it is connected with same mounting panel to rotate between the lower extreme lateral wall of landing leg.
Compared with the prior art, the invention has the beneficial effects that:
1. the crushing wheel is utilized to rotate, so that soil, sundries and the like are crushed, and meanwhile, the soil can be thrown upwards, so that gas in the box body is pumped out by the negative pressure pump, materials in the drainage tube are pushed to move under the action of pressure difference, and then some soil, sundries and the like are led out from the collapse place, the structure is simple, the operation is convenient, secondary damage to the collapse position is small, subsequent work is facilitated, and the burden of workers is relieved;
2. the soil entering the box body can fall onto the conveying belt, so that the materials can be quickly and conveniently placed from the mounting groove under the action of the servo motor, and time and labor are saved;
3. utilize the cooperation of sliding plate, cam, fixed plate isotructure, drive the hose district and rock, can drop the material in the hose district to the box with more ground speed like this, save time improves work efficiency.
Drawings
Fig. 1 is a schematic structural diagram of a pneumatic trenchless repairing device for local collapse of a pipeline provided by the invention;
FIG. 2 is a schematic view of the structure at A in FIG. 1;
FIG. 3 is a schematic view of the structure at B in FIG. 1;
fig. 4 is a schematic structural diagram at C in fig. 1.
In the figure: the device comprises a mounting groove 1, a protective cover 2, a driving motor 3, a rotating rod 4, a mounting shell 5, a bevel gear 6, a supporting rod 7, a bevel gear 8, a receiving groove 9, a worm 10, a crushing wheel 11, a worm wheel 12, a box 13, a negative pressure pump 14, an air suction pipe 15, a drainage pipe 16, a dust collecting cover 17, a hose area 18, a cam 19, a fixing plate 20, a sliding plate 21, a return spring 22, a push rod 23, a movable plate 24, a mounting plate 25, a mounting frame 26, a servo motor 27, supporting legs 28, a driving roller 29, a conveying belt 30, a baffle 31, a damping spring 32, a supporting plate 33, a supporting roller 34, a handheld rod 35, a receiving hopper 36 and a guide plate 37.
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.
Referring to fig. 1-4, a pneumatic trenchless repairing device for local collapse of a pipeline comprises a mounting groove 1, wherein a hand-held rod 35 is fixedly connected to the upper end side wall of the mounting groove 1, one end, far away from the mounting groove 1, of the hand-held rod 35 is wrapped with a rubber pad, so that the mounting groove 1 is convenient to move, so that collapsed materials at different positions can be excavated, a detachable receiving hopper 36 is mounted on the lower end side wall of the mounting groove 1, so that the materials can be conveniently taken out, an inclined guide plate 37 is fixedly connected to the side wall of the mounting groove 1, the materials can easily fall into the receiving hopper 36 along the guide plate 37, the guide plate 37 extends into the receiving hopper 36, the lower end side wall of the mounting groove 1 is rotatably connected with a plurality of supporting legs 28, the same mounting plate 25 is rotatably connected between the lower end side walls of the plurality of supporting legs 28, and a good supporting effect can be achieved on the mounting groove 1 through the mounting plate 25 and the supporting legs 28, the mounting groove 1 is convenient to move, the mounting frame 26 is fixedly connected to the inner wall of the mounting groove 1, the side wall of the upper end of the mounting frame 26 is fixedly connected with a plurality of damping springs 32, a same supporting plate 33 is fixedly connected between the side walls of the upper ends of the damping springs 32, a plurality of supporting rollers 34 are arranged on the side wall of the upper end of the supporting plate 33, and the supporting rollers 34 are abutted to the inner wall of the conveying belt 30, so that the supporting rollers 34 can have a good supporting effect on the conveying belt 30, materials can be stably supported, stable movement of the materials is guaranteed, the servo motor 27 is fixedly connected to the side wall of the mounting frame 26, and a plurality of driving rollers 29 are rotatably connected between the inner walls of the two sides of the mounting frame 26;
an output shaft of the servo motor 27 is fixedly connected with a side wall of one of the transmission rollers 29, a transmission belt 30 is arranged among the transmission rollers 29, the transmission belt 30 is a rubber transmission belt, so that materials are stably transmitted, one end of the transmission belt 30 is positioned under the box body 13, baffle plates 31 are fixedly connected with inner walls of two sides of the mounting groove 1, so that the materials can be blocked, the materials are prevented from falling into the mounting groove 1, the side wall of each baffle plate 31 is abutted against the side wall of the transmission belt 30, a protective cover 2 is fixedly connected with the inner wall of the mounting groove 1, a driving motor 3 is arranged in the protective cover 2, an output shaft of the driving motor 3 penetrates through the protective cover 2 and is fixedly connected with a rotating rod 4, the rotating rod 4 penetrates through the bottom wall of the mounting groove 1, a mounting shell 5 is fixedly connected with the side wall of the mounting groove 1, the mounting shell 5 is of a hollow structure, the rotating rod 4 penetrates through the inner wall of the mounting shell 5 and is rotatably connected with the inner wall of the mounting shell 5, two bevel gears 6 which are symmetrically arranged are fixedly sleeved on the rotating rod 4 positioned in the mounting shell 5, the inner wall of the lower end of the mounting shell 5 is rotatably connected with two supporting rods 7, bevel gears 8 which are matched with the bevel gears 6 are fixedly sleeved on the two supporting rods 7, and the side wall of the upper end of the mounting shell 5 is fixedly connected with a containing groove 9;
the two supporting rods 7 penetrate through the inner wall of the mounting shell 5 and the side wall of the accommodating groove 9, the side wall of the supporting rod 7 in the accommodating groove 9 is fixedly connected with a worm 10, the supporting rod 7 and the worm 10 are integrally formed, the inner wall of the accommodating groove 9 is rotatably connected with two crushing wheels 11, the side walls of the two crushing wheels 11 are fixedly connected with worm wheels 12 matched with the worm 10, the inner wall of the mounting groove 1 is fixedly connected with a box body 13, the side wall of the box body 13 is connected with a breathable film matched with an air suction pipe 15 in a clamping manner, the inner wall of the box body 13 is provided with a smooth layer, the inner wall of the lower end of the box body 13 is obliquely arranged, so that materials can rapidly slide down along the box body 13, the side wall of the box body 13 is provided with an automatic door, so that the materials can be stably sucked into the box body 13, the side wall of the lower end of the box body 13 is provided with a discharge hole, a negative pressure pump 14 is mounted on the inner wall of the mounting groove 1, and an air suction hole of the negative pressure pump 14 is hermetically connected with the air suction pipe 15, the air suction pipe 15 is connected with the side wall of the box body 13 in a sealing way, the side wall of the box body 13 far away from the air suction pipe 15 is connected with a drainage pipe 16 in a sealing way, a hose area 18 is arranged on the drainage pipe 16 positioned in the installation groove 1, and the hose area 18 is obliquely arranged;
the rotating rod 4 in the mounting groove 1 is fixedly sleeved with a cam 19, the bottom wall of the mounting groove 1 is fixedly connected with a fixed plate 20, the bottom wall of the mounting groove 1 is slidably connected with a sliding plate 21, the side wall of the sliding plate 21 is fixedly connected with the side wall of the fixed plate 20 through a return spring 22, the side wall of the sliding plate 21 abuts against the side wall of the cam 19, the side wall of the sliding plate 21 is fixedly connected with a push rod 23, the return spring 22 is sleeved on the push rod 23, the push rod 23 penetrates through the side wall of the fixed plate 20 and is fixedly connected with a movable plate 24, the upper end side wall of the movable plate 24 is connected with the side wall of the hose area 18 in a clamping manner, the rotating rod 4 drives the cam 19 to rotate when rotating, the cam 19 abuts against the sliding plate 21 to move, the push rod 23 is driven by the sliding plate 21 to move, the push rod 23 drives the movable plate 24 to lift, so that the hose area 18 can rock, and further quickly shake materials in the drainage tube 16 into the box body 13, thereby saving time, the work efficiency is improved, the drainage tube 16 penetrates through the inner wall of the installation groove 1 and is hermetically connected with the dust collection cover 17, the drainage tube 16 positioned in the installation groove 1 is obliquely arranged, and the dust collection cover 17 is positioned above the accommodating groove 9.
When the invention excavates collapsed soil, sundries and the like, the driving motor 3 can be used for driving the rotating rod 4 to rotate, the rotating rod 4 drives the bevel gear 6 and the bevel gear 8 to rotate, further the supporting rod 7 is driven to rotate, the worm rod 7 drives the worm 10 to rotate, the worm 10 drives the worm wheel 12 to rotate, the worm wheel 12 drives the crushing wheels 11 to rotate, the rotating directions of the two crushing wheels 11 are opposite, and when the crushing wheels 11 rotate, the contact parts are rotated upwards, so that the crushing wheels 11 can rapidly crush the soil, the sundries and the like, and can throw the crushed materials upwards to enable the materials to enter the dust hood 17, the negative pressure pump 14 can pump the gas in the box body 13 to enable the box body 13 to be in a negative pressure state, the lower end of the box body 13 is provided with the automatic door which can be opened and closed automatically, thereby facilitating the discharge of the materials, and under the action of pressure difference, the materials in the drainage tube 16 are pushed to move, and then derive some earth, debris etc. from the place that collapses, simple structure, convenient operation, the secondary damage that causes the position of collapsing moreover is little to subsequent work goes on smoothly, alleviates staff's burden.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. The utility model provides a pneumatic non-excavation prosthetic devices that pipeline part collapses, includes mounting groove (1), its characterized in that, the inner wall fixedly connected with safety cover (2) of mounting groove (1), be equipped with driving motor (3) in safety cover (2), the output shaft of driving motor (3) runs through safety cover (2) and fixedly connected with bull stick (4), bull stick (4) runs through the diapire of mounting groove (1), the lateral wall fixedly connected with installation shell (5) of mounting groove (1), installation shell (5) are hollow structure, bull stick (4) run through the inner wall of installation shell (5) and are connected with the inner wall rotation of installation shell (5), be located in installation shell (5) the fixed cover is equipped with bevel gear (6) that two symmetries set up on bull stick (4), the lower extreme inner wall rotation of installation shell (5) is connected with two branch (7), bevel gears (8) matched with the bevel gears (6) are fixedly sleeved on the two supporting rods (7), the side wall of the upper end of the installation shell (5) is fixedly connected with a containing groove (9), the two supporting rods (7) penetrate through the inner wall of the installation shell (5) and the side wall of the containing groove (9), the side wall of each supporting rod (7) positioned in the containing groove (9) is fixedly connected with a worm (10), the supporting rods (7) and the worms (10) are integrally formed, the inner wall of the containing groove (9) is rotatably connected with two crushing wheels (11), the side walls of the two crushing wheels (11) are fixedly connected with worm wheels (12) matched with the worms (10), the inner wall of the installation groove (1) is fixedly connected with a box body (13), the side wall of the lower end of the box body (13) is provided with a discharge hole, and the inner wall of the installation groove (1) is provided with a negative pressure pump (14), the suction opening of the negative pressure pump (14) is hermetically connected with an air suction pipe (15), the air suction pipe (15) is hermetically connected with the side wall of the box body (13), the side wall of the box body (13) far away from the air suction pipe (15) is hermetically connected with a drainage pipe (16), the drainage pipe (16) penetrates through the inner wall of the mounting groove (1) and is hermetically connected with a dust collection cover (17), the drainage pipe (16) is arranged in the mounting groove (1) in an inclined mode, and the dust collection cover (17) is arranged above the accommodating groove (9).
2. The pneumatic trenchless restoration device for the local collapse of the pipeline according to claim 1, wherein a flexible pipe area (18) is arranged on the drainage pipe (16) in the installation groove (1), the flexible pipe area (18) is arranged in an inclined manner, a cam (19) is fixedly sleeved on the rotating rod (4) in the installation groove (1), a fixed plate (20) is fixedly connected to the bottom wall of the installation groove (1), a sliding plate (21) is slidably connected to the bottom wall of the installation groove (1), the side wall of the sliding plate (21) is fixedly connected to the side wall of the fixed plate (20) through a return spring (22), the side wall of the sliding plate (21) is abutted against the side wall of the cam (19), a push rod (23) is fixedly connected to the side wall of the sliding plate (21), the return spring (22) is sleeved on the push rod (23), and a movable plate (24) is fixedly connected to the push rod (23) through the side wall of the fixed plate (20), the side wall of the upper end of the movable plate (24) is connected with the side wall of the hose area (18) in a clamping mode.
3. The pneumatic trenchless repairing device for the local collapse of the pipeline as claimed in claim 1, wherein a breathable film matched with the air suction pipe (15) is connected to the side wall of the box body (13) in a clamping manner, a smooth layer is arranged on the inner wall of the box body (13), and the inner wall of the lower end of the box body (13) is obliquely arranged.
4. The pneumatic trenchless repairing device for the local collapse of the pipeline according to claim 1, wherein a mounting rack (26) is fixedly connected to the inner wall of the mounting groove (1), a servo motor (27) is fixedly connected to the side wall of the mounting rack (26), a plurality of transmission rollers (29) are rotatably connected between the inner walls of the two sides of the mounting rack (26), an output shaft of the servo motor (27) is fixedly connected to the side wall of one of the transmission rollers (29), a plurality of transmission belts (30) are arranged between the transmission rollers (29), each transmission belt (30) is a rubber transmission belt, one end of each transmission belt (30) is located under a box body (13), baffles (31) are fixedly connected to the inner walls of the two sides of the mounting groove (1), and the side walls of the baffles (31) are abutted to the side walls of the transmission belts (30).
5. The pneumatic trenchless restoration device for the local collapse of the pipeline according to claim 4, wherein a plurality of damping springs (32) are fixedly connected to the upper end side wall of the mounting frame (26), a same supporting plate (33) is fixedly connected between the upper end side walls of the plurality of damping springs (32), a plurality of supporting rollers (34) are arranged on the upper end side wall of the supporting plate (33), and the plurality of supporting rollers (34) are abutted to the inner wall of the conveyor belt (30).
6. The pneumatic trenchless repairing device for the local collapse of the pipeline as claimed in claim 1, wherein a hand-held rod (35) is fixedly connected to the side wall of the upper end of the installation groove (1), and a rubber pad is wrapped on one end, far away from the installation groove (1), of the hand-held rod (35).
7. The pneumatic trenchless restoration device for the local collapse of the pipeline according to claim 1, wherein a detachable receiving hopper (36) is installed on the side wall of the lower end of the installation groove (1), an inclined guide plate (37) is fixedly connected to the side wall of the installation groove (1), and the guide plate (37) extends into the receiving hopper (36).
8. The pneumatic trenchless restoration device for the local collapse of the pipeline according to claim 1, wherein a plurality of support legs (28) are rotatably connected to the lower end side wall of the installation groove (1), and the same mounting plate (25) is rotatably connected between the lower end side walls of the plurality of support legs (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172556.0A CN112268161B (en) | 2020-10-28 | 2020-10-28 | Pneumatic non-excavation prosthetic devices that pipeline part collapses |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011172556.0A CN112268161B (en) | 2020-10-28 | 2020-10-28 | Pneumatic non-excavation prosthetic devices that pipeline part collapses |
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| CN112268161A CN112268161A (en) | 2021-01-26 |
| CN112268161B true CN112268161B (en) | 2022-03-18 |
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