阅读说明：本技术 地下管道内壁热熔修复成套设备及方法 (Complete equipment and method for hot-melting repair of inner wall of underground pipeline ) 是由 肖芳 李晶 刘怡 王轶伦 李明瑶 史国华 于 2021-09-07 设计创作，主要内容包括：本发明公开了一种地下管道内壁热熔修复成套设备及方法,该成套设备,包括用于对管道修复区间的两端进行封堵的封堵装置、用于对管道修复区间进行清理的清理装置、用于输送塑料颗粒的输送装置以及熔融挤出成型装置,所述输送装置的出料端与熔融挤出成型装置的进料端连通。采用本申请的成套设备及方法,提高了管道修复质量、降低了管道修复成本、减少了管道修复的施工量。(The invention discloses complete equipment and a method for hot-melting repair of an inner wall of an underground pipeline. By adopting the complete equipment and the method, the pipeline repairing quality is improved, the pipeline repairing cost is reduced, and the construction quantity of pipeline repairing is reduced.)

1. The utility model provides an underground pipe inner wall hot melt restoration complete sets which characterized in that: the device comprises a plugging device (100) for plugging two ends of a pipeline repairing interval, a cleaning device (200) for cleaning the pipeline repairing interval, a conveying device (300) for conveying plastic particles and a melting extrusion molding device (400), wherein the discharge end of the conveying device is communicated with the feed end of the melting extrusion molding device.

2. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 1, which is characterized in that: the plugging device comprises an air bag (101), an air bag support (102), an air pump (104) and a plugging trolley (103), wherein the air bag is fixed on the plugging trolley through the air bag support, an air inlet nozzle (107) and an air exhaust nozzle (108) are arranged on the air bag, the air inlet nozzle and the air exhaust nozzle are respectively provided with an air inlet valve (106) and an air exhaust valve (109), the air inlet nozzle is communicated with the air pump through an air inlet pipe (105), and the air pump is arranged on the plugging trolley.

3. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 1, which is characterized in that: the cleaning device comprises a cleaning trolley (210), a brush head (201), a brush head rotating motor (205), a scraper (209) and a scraper rotating motor (208), wherein the brush head is fixedly connected with a main shaft of the brush head rotating motor through an elastic telescopic connecting rod assembly, the scraper is fixedly connected with the main shaft of the scraper rotating motor through an elastic telescopic connecting rod assembly, and the brush head rotating motor and the scraper rotating motor are both arranged on the cleaning trolley; the elastic telescopic connecting rod assembly comprises a rod body (202) and a barrel body (204) which are sleeved in a sliding mode, and one end, located in the barrel body, of the rod body is connected with the inner wall of the barrel body through a spring (203).

4. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 1, which is characterized in that: the conveying device comprises a shell (301), a feeding bucket wheel (302) which is rotatably assembled in the shell in a crossing manner through a bucket wheel rotating shaft, a feeding motor (307) for driving the feeding bucket wheel and the bucket wheel rotating shaft to synchronously rotate, a driving gear (303) fixedly installed at the end part of the bucket wheel rotating shaft, a driven gear (304) which is installed on the shell and is meshed with the driving gear, a material pushing connecting rod (305), a pushing shovel (306), a feeding trolley (314) and a storage bin (310) arranged on the feeding trolley; a feed inlet is formed in one side of the shell, the other side of the shell is communicated with the storage bin through a material guide hose (309), and a discharge valve (308) is arranged at the joint of the material guide hose and the shell; one end of the material pushing connecting rod is hinged with the position, close to the outer edge, of the end face of the driven gear; one side of the storage bin is rotatably assembled with a discharge pipe (311), and one end of the discharge pipe, which is far away from the storage bin, is connected with a plurality of material distributing pipes (313) with material distributing valves (312).

5. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 1, which is characterized in that: the melting extrusion molding device comprises a coating trolley (408), a melting device rotating motor (407), a molding shovel (410) and a molding shovel rotating motor (409), wherein the melting device comprises a melting cylinder (405), a material pushing piston (403) hermetically and slidably assembled with the melting cylinder, a material pushing cylinder (401) arranged at the tail end of the melting cylinder and used for pushing the material pushing piston to move, a material discharging nozzle (406) arranged at the head end of the melting cylinder and a material feeding pipe (404) which is arranged on the side wall of the melting cylinder and is butted with a material distributing pipe and provided with a material feeding valve (402); the melting cylinder is fixedly connected with a main shaft of a rotating motor of the melting device through an elastic telescopic connecting rod assembly, the forming shovel is fixedly connected with the main shaft of the rotating motor of the forming shovel through the elastic telescopic connecting rod assembly, and the rotating motor of the melting device and the rotating motor of the forming shovel are both arranged on the coating trolley.

6. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 3, wherein: a main shaft of the brush head rotating motor (205) is connected with a plurality of brush heads (201) which are circumferentially arranged through an elastic telescopic connecting rod component; and a main shaft of the scraper rotating motor is connected with a plurality of circumferentially arranged scrapers through an elastic telescopic connecting rod assembly.

7. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 3, wherein: the cleaning trolley is also provided with a sewage pump (206) and a dust collector (207).

8. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 5, wherein: a main shaft of the melting device rotating motor (407) is connected with a plurality of melting barrels (405) which are circumferentially arranged through an elastic telescopic connecting rod assembly; and a main shaft of the forming shovel rotating motor is connected with a plurality of forming shovels which are circumferentially arranged through an elastic telescopic connecting rod assembly.

9. The complete equipment for hot-melt restoration of the inner wall of the underground pipeline according to claim 5, wherein: and a polytetrafluoroethylene coating is sprayed on the inner wall of the melting cylinder (405).

10. A method for performing hot-melt repair of an inner wall of an underground pipeline by using the complete equipment of claim 1, which comprises the following steps:

s1: plugging two ends of the repair area by using a plugging device;

s2: cleaning the repair area by using a cleaning device;

s3: conveying the plastic particles by a conveying device;

s4: and melting, extruding and molding the plastic particles on the inner wall of the repair area by a melting and extruding molding device to form the repair coating so as to complete the repair of the inner wall of the pipeline.

Technical Field

The invention relates to the technical field of underground pipeline repair, in particular to complete equipment and a method for hot-melting repair of an inner wall of an underground pipeline.

Background

In the underground pipeline restoration project, especially the pipeline restoration project used by urban rainwater and sewage pipelines, the current common process technologies include an overturn lining restoration method, an ultraviolet light curing pipeline restoration method, an insertion pipe restoration method, an expansion pipe restoration method and the like, wherein the overturn lining restoration method and the ultraviolet curing restoration method are the current mainstream processes, and the two methods both need to insert the manufactured flexible lining pipe into the pipeline to be restored, and then respectively adopt hot water and ultraviolet light to heat and solidify the pipeline so as to harden the lining pipe and tightly combine the lining pipe with the inner wall of the pipeline to be restored, thereby achieving the purpose of pipeline restoration. The methods have some defects, such as that the inner liner is not tightly attached to the inner wall of the original pipeline, the bonding strength is low, and the inner liner is easy to separate from the collapse to influence the pipeline repairing quality; the lining pipe needs to be preprocessed, and pipelines with different diameters and cross-sectional shapes need corresponding lining hoses, so that the manufacturing cost is high, and the flexibility is low. In addition, a large auxiliary tunnel needs to be excavated at the pipe end, so that the construction amount is large, and the influence on traffic is large.

Disclosure of Invention

In view of the above, the present invention aims to provide a complete set of equipment and a method for hot-melting repair of an inner wall of an underground pipeline, so as to improve the quality of pipeline repair, reduce the cost of pipeline repair, and reduce the construction amount of pipeline repair.

The invention solves the problems through the following technical means:

the utility model provides an underground pipe inner wall hot melt restoration complete sets, is used for carrying out the plugging device of shutoff, the cleaning device who is used for clearing up, the conveyor and the melting extrusion moulding device that are used for carrying plastic granules to the pipeline is restoreed the interval including the both ends that are used for restoring the pipeline, conveyor's discharge end and melting extrusion moulding device's feed end intercommunication.

Further, the plugging device comprises an air bag, an air bag support, an air pump and a plugging trolley, the air bag is fixed on the plugging trolley through the air bag support, an air inlet nozzle and an air exhaust nozzle are arranged on the air bag, the air inlet nozzle and the air exhaust nozzle are respectively provided with an air inlet valve and an air exhaust valve, the air inlet nozzle is communicated with the air pump through an air inlet pipe, and the air pump is arranged on the plugging trolley.

Further, the cleaning device comprises a cleaning trolley, a brush head rotating motor, a scraper and a scraper rotating motor, wherein the brush head is fixedly connected with a main shaft of the brush head rotating motor through an elastic telescopic connecting rod assembly; the elastic telescopic connecting rod assembly comprises a rod body and a barrel body which are sleeved in a sliding mode, and one end, located in the barrel body, of the rod body is connected with the inner wall of the barrel body through a spring.

Further, the conveying device comprises a shell, a feeding bucket wheel, a feeding motor, a driving gear, a driven gear, a pushing connecting rod, a pushing shovel, a feeding trolley and a storage bin, wherein the feeding bucket wheel is rotatably assembled in the shell in a crossing mode through a bucket wheel rotating shaft; a feed inlet is formed in one side of the shell, the other side of the shell is communicated with the storage bin through a material guide hose, and a discharge valve is arranged at the joint of the material guide hose and the shell; one end of the material pushing connecting rod is hinged with the position, close to the outer edge, of the end face of the driven gear; one side of the storage bin is rotatably assembled with a discharge pipe, and one end, far away from the storage bin, of the discharge pipe is connected with a plurality of material distributing pipes with material distributing valves.

Further, the melting extrusion molding device comprises a coating trolley, a melting device rotating motor, a molding shovel and a molding shovel rotating motor, wherein the melting device comprises a melting cylinder, a material pushing piston assembled with the melting cylinder in a sealing and sliding mode, a material pushing cylinder arranged at the tail end of the melting cylinder and used for pushing the material pushing piston to move, a material discharging nozzle arranged at the head end of the melting cylinder and a feeding pipe with a material feeding valve, wherein the feeding pipe is arranged on the side wall of the melting cylinder and butted with the material distributing pipe; the melting cylinder is fixedly connected with a main shaft of a rotating motor of the melting device through an elastic telescopic connecting rod assembly, the forming shovel is fixedly connected with the main shaft of the rotating motor of the forming shovel through the elastic telescopic connecting rod assembly, and the rotating motor of the melting device and the rotating motor of the forming shovel are both arranged on the coating trolley.

Further, a main shaft of the brush head rotating motor is connected with a plurality of circumferentially arranged brush heads through an elastic telescopic connecting rod assembly; and a main shaft of the scraper rotating motor is connected with a plurality of circumferentially arranged scrapers through an elastic telescopic connecting rod assembly.

Furthermore, a sewage pump and a dust collector are also arranged on the cleaning trolley.

Further, a main shaft of a rotating motor of the melting device is connected with a plurality of melting barrels which are circumferentially arranged through an elastic telescopic connecting rod assembly; and a main shaft of the forming shovel rotating motor is connected with a plurality of forming shovels which are circumferentially arranged through an elastic telescopic connecting rod assembly.

Further, the inner wall of the melting cylinder is sprayed with a polytetrafluoroethylene coating.

A hot-melting repairing method for the inner wall of an underground pipeline comprises the following steps:

s1: plugging two ends of the repair area by using a plugging device;

s2: cleaning the repair area by using a cleaning device;

s3: conveying the plastic particles by a conveying device;

s4: and melting, extruding and molding the plastic particles on the inner wall of the repair area by a melting and extruding molding device to form the repair coating so as to complete the repair of the inner wall of the pipeline.

The invention has the beneficial effects that:

1. the utility model provides an underground piping inner wall hot melt restores complete sets has multi-functional complex such as pipeline shutoff, clearance, plastic granules transport, plastics melting extrusion and shaping, has realized restoring in coordination one-stop to underground piping.

2. The working devices are loaded by the plurality of walking trolleys, so that the devices can be freely combined, and the walking trolley can adapt to construction under various working conditions.

3. The whole set of equipment and the process can adopt remote control, personnel do not need to enter an underground pipeline, and the harm of the environment in the underground pipeline to a human body is reduced.

4. The method can perform programmed control, reduce unstable factors of manual operation, make the operation process more standardized, reduce the interruption time in the operation and improve the operation efficiency.

5. Because the two ends are provided with the flexible plugging devices, the sewage and the dirt on the outer side can be isolated from the middle repairing area. The influence of the whole repairing work on the upstream and the downstream of the pipeline is small, and the cleaning device is arranged to clean and scrape the inner wall and discharge sewage, so that a relatively ideal working environment is created for a working area.

6. Because the conveying device and the pipeline are adopted to convey the plastic particle raw materials, the whole operation process is more continuous, the equipment size is smaller, and the plastic particle conveying device can adapt to pipelines with more specifications.

7. Because the melting and the forming fixing are carried out in the pipeline, the construction excavation work amount is reduced, the influence on traffic is reduced, the formed lining pipeline does not need to be processed in advance, the construction cost is reduced, and the flexibility of repair operation is improved.

8. The melting extrusion molding device is provided with a plurality of uniformly distributed melting cylinders which can rotate around the main shaft. And the melting cylinder is provided with an oblique feeding pipe, and the feeding pipes of the plurality of melting cylinders are butted with the material distributing pipe, so that the annular or spiral continuous discharging molding in the pipeline is realized.

9. The inner wall of the melting cylinder is sprayed with the polytetrafluoroethylene coating, so that the plastic fluid can be discharged more smoothly, the adhesion is less, the melting cylinder is of a two-piece or multi-piece detachable structure, and the melting cylinder can be detached after being used, so that the inside of the melting cylinder can be cleaned mechanically.

Drawings

The invention is further described below with reference to the figures and examples.

FIG. 1 is a schematic view of the construction of the present invention;

FIG. 2 is a schematic view of the occluding device of the present invention;

FIG. 3 is a schematic view of the cleaning apparatus according to the present invention;

FIG. 4 is a schematic view of the structure of the conveying device of the present invention;

FIG. 5 is a schematic view of a melt extrusion molding apparatus according to the present invention;

FIG. 6 is a side view of the melting barrel installation;

figure 7 is a side view of the forming shovel installation.

In the figure: 100- -an occlusion device; 200- -a cleaning device; 300- -a conveying device; 400- -melt extrusion molding apparatus; 500- -a pipe; 101- -air bag; 102- -balloon stent; 103-plugging trolley; 104- -an air pump; 105- -inlet pipe; 106- -an intake valve; 107- -air inlet nozzle; 108- -an exhaust nozzle; 109-exhaust valve; 201- -a brush head; 202- -the rod body; 203- -spring; 204- -a cylinder; 205- -brushhead rotary motor; 206- -sewage pump; 207- -vacuum cleaner; 208- -blade rotation motor; 209-a scraper; 210- -cleaning the cart; 301- -a housing; 302- -feed bucket wheel; 303 — a drive gear; 304-driven gear; 305- -pushing ram; 306-pushing shovel; 307- -feed motor; 308- -a bleeder valve; 309-guide hose; 310- -a storage bin; 311- -discharge pipe; 312- -a dispensing valve; 313- -divide pipe; 314- -feed car; 401- -a pusher cylinder; 402- -a feed valve; 403-pushing piston; 404- -a feed pipe; 405- -a melting cylinder; 406- -a tap; 407- -melting apparatus rotating Motor; 408- -paint vehicle; 409- -forming shovel rotation motor; 410- -forming shovel.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1 to 7, the present embodiment provides a complete set of equipment for hot-melting repair of an inner wall of an underground pipeline, which includes a plugging device 100 for plugging two ends of a pipeline repair section, a cleaning device 200 for cleaning the pipeline repair section, a conveying device 300 for conveying plastic particles, and a melt extrusion molding device 400, wherein a discharge end of the conveying device is communicated with a feed end of the melt extrusion molding device.

The plugging device comprises an air bag 101, an air bag support 102, an air pump 104 and a plugging trolley 103, the air bag is fixed on the plugging trolley through the air bag support, an air inlet nozzle 107 and an air exhaust nozzle 108 are arranged on the air bag, the air inlet nozzle and the air exhaust nozzle are respectively provided with an air inlet valve 106 and an air exhaust valve 109, the air inlet nozzle is communicated with the air pump through an air inlet pipe 105, and the air pump is arranged on the plugging trolley.

The air bag is made of flexible rubber fiber reinforced materials. One end of the air bag is suspended, and the other end of the air bag is provided with a flange and fixed on the air bag bracket through the flange. And the air bag is convenient to disassemble by adopting a flange connection mode. When the air bag is in work, the air inlet valve is opened, the exhaust valve is closed, the air pump is started, air is introduced into the air bag to expand, the air bag is tightly attached to the inner wall of the in-situ pipeline, and liquid on the outer side is prevented from entering a pipeline repairing area. After the work is finished, the air pump is turned off, the exhaust valve is opened, the air bag is contracted, and the air bag is transported to other stations through the load of the plugging trolley.

The cleaning device comprises a cleaning trolley 210, a brush head 201, a brush head rotating motor 205, a scraper 209 and a scraper rotating motor 208, wherein the brush head 201 is fixedly connected with a main shaft of the brush head rotating motor 205 through an elastic telescopic connecting rod assembly, the scraper 209 is fixedly connected with a main shaft of the scraper rotating motor 208 through an elastic telescopic connecting rod assembly, and the brush head rotating motor 205 and the scraper rotating motor 208 are both arranged on the cleaning trolley; the elastic telescopic connecting rod assembly comprises a rod body 202 and a barrel body 204 which are sleeved in a sliding mode, and one end, located in the barrel body, of the rod body is connected with the inner wall of the barrel body through a spring 203. Preferably, in order to improve the cleaning efficiency, a main shaft of the brush head rotating motor is connected with a plurality of circumferentially arranged brush heads through an elastic telescopic connecting rod assembly; and a main shaft of the scraper rotating motor is connected with a plurality of circumferentially arranged scrapers through an elastic telescopic connecting rod assembly.

The cleaning trolley is also provided with a sewage pump 206 and a dust collector 207.

When the pipeline cleaning device works, the brush head and the scraper extend outwards under the action of the elastic telescopic connecting rod assembly and cling to the inner wall of the pipeline 500; the brush head rotates under the drive of the brush head rotating motor to clean the inner wall of the pipeline, and the sewage pump is started to suck sewage in the pipeline and convey the sewage to the outside of the pipeline through the pump pipe for sewage treatment. The scraper is driven by the scraper rotating motor to rotate so as to carry out scraping operation, the inner wall of the pipeline is deeply cleaned, and the scraped inner wall plastic waste is collected by the dust collector.

The conveying device comprises a shell 301, a feeding bucket wheel 302 which is rotatably assembled in the shell in a crossing manner through a bucket wheel rotating shaft, a feeding motor 307 for driving the feeding bucket wheel and the bucket wheel rotating shaft to synchronously rotate, a driving gear 303 fixedly installed at the end part of the bucket wheel rotating shaft, a driven gear 304 which is installed on the shell and is meshed with the driving gear, a pushing connecting rod 305, a pushing shovel 306, a feeding trolley 314 and a storage bin 310 arranged on the feeding trolley; a feed inlet is formed in one side of the shell, the other side of the shell is communicated with the storage bin through a material guide hose 309, and a discharge valve 308 is arranged at the joint of the material guide hose and the shell; one end of the pushing connecting rod is hinged with the position, close to the outer edge, of the end face of the driven gear, the other end of the pushing connecting rod is hinged with the push shovel, and a crank-slider type pushing mechanism is formed among the driven gear, the pushing connecting rod and the push shovel; one side of the storage bin is rotatably provided with a discharge pipe 311, and one end of the discharge pipe, which is far away from the storage bin, is connected with a plurality of material distributing pipes 313 with material distributing valves 312.

The feeding bucket wheel is of a wheel type structure, comprises left and right side plates which are arranged oppositely and shaft sleeves which are positioned between the left and right side plates, the shaft sleeves are fixedly assembled with a bucket wheel rotating shaft, a plurality of arc-shaped partition plates are formed on the outer peripheral wall of each shaft sleeve along the radiation of the center line of each shaft sleeve, and the wall surfaces of the left and right side plates and the outer peripheral wall of each shaft sleeve are enclosed to form a material taking part of the bucket wheel.

Be formed with material transfer passage in the casing, the transport passage is interior to install the push mechanism with the linkage of feeding bucket wheel, installs the feed motor drive on the casing feeding bucket wheel motion will be carried to material transfer passage in from the material that the feed inlet got into on the casing, push mechanism will drop the material in material transfer passage along ejection of compact direction propelling movement.

The discharge end of the material conveying channel is communicated with a storage bin 310 through a material guide hose 309 and then conveyed to the feed end of the melting extrusion molding device through a discharge pipe 311 and a material distribution pipe 313.

During the operation, place the feed inlet in plastic granules corresponds the side and apply suitable dynamics and cut into the granule and pile, the granule flows in the feed inlet, starts the feeding motor, drives the feeding fill wheel and rotates, shovels plastic granules and rotatory carries to feeding fill wheel opposite side to the landing is to stopping on the shovel that pushes away of below under the dual function of inertial force and gravity. Meanwhile, a crank link mechanism synchronously driven by a feeding motor drives a push shovel to move towards the discharge hole, and meanwhile, a discharge valve is opened to push out the granular materials. Feeding the plastic particles into a material guiding hose, and allowing the plastic particles to flow into a storage bin under the action of a feeding bucket wheel, a push shovel and gravity.

The melting extrusion molding device comprises a coating trolley 408, a melting device rotating motor 407, a molding shovel 410 and a molding shovel rotating motor 409, wherein the melting device comprises a melting cylinder 405, a material pushing piston 403 assembled with the melting cylinder in a sealing and sliding manner, a material pushing cylinder 401 arranged at the tail end of the melting cylinder and used for pushing the material pushing piston to move, a material discharging nozzle 406 arranged at the head end of the melting cylinder and a material feeding pipe 404 arranged on the side wall of the melting cylinder and butted with a material distributing pipe and provided with a material feeding valve 402; the melting cylinder 405 is fixedly connected with a main shaft of a melting device rotating motor 407 through an elastic telescopic connecting rod assembly, the forming shovel 410 is fixedly connected with a main shaft of a forming shovel rotating motor 409 through an elastic telescopic connecting rod assembly, and the melting device rotating motor 407 and the forming shovel rotating motor 409 are both arranged on a coating trolley 408. Preferably, in order to improve the melting and coating efficiency, a main shaft of a rotating motor of the melting device is connected with a plurality of melting barrels which are circumferentially arranged through an elastic telescopic connecting rod assembly; and a main shaft of the forming shovel rotating motor is connected with a plurality of forming shovels which are circumferentially arranged through an elastic telescopic connecting rod assembly. The number of the melting barrels is matched with that of the material distributing pipes. In addition, the melting cylinder can also be in butt joint with each material distributing pipe in sequence in the rotating process.

The melting cylinder is cylindrical, the front end of the melting cylinder is in a gradually-changed conical shape, the melting cylinder is connected with the discharge nozzle through the gooseneck section, the discharge nozzle is flat, and the inner wall of the melting cylinder is sprayed with a polytetrafluoroethylene coating.

The outer wall of the melting cylinder is provided with a plurality of arc-shaped heating plates which can be electrically heated, and the melting cylinder is heated to a set temperature, generally 200-300 ℃,

the pushing piston is fixedly connected with a push rod of the pushing cylinder, and is pushed by the pushing cylinder to extrude the molten plastic fluid through the discharge nozzle.

During operation, the melting cylinder extrudes plastic fluid to be tightly attached to the pipeline wall through the discharge nozzle, the discharge nozzle and the original pipeline inner wall extrude the material, the material is uniformly coated on the pipeline inner wall according to the set thickness through rotation, and the plastic fluid is preliminarily positioned.

The forming shovel is driven by the coating trolley and is driven by the elastic telescopic connecting rod assembly to be externally tensioned to be tightly attached to the plastic body which is just positioned, and an outward tensioning force is applied to the plastic body to enable the plastic body to be tightly attached to the inner wall of the original pipeline.

The melting barrels are exemplified by three groups, wherein when the first group is performing extrusion molding operation, the second group is performing heating melting operation, and the third group is performing feeding operation. The circular operation is carried out in sequence to ensure that the extrusion operation is carried out uninterruptedly and improve the working efficiency.

The plugging trolley, the cleaning trolley, the feeding trolley and the coating trolley all operate in a pipeline, and the control unit is connected with each trolley and each device through wires or wirelessly, so that multiple functions of remote control, walking, raw material conveying, melting, extruding and forming are realized. By adopting the complete equipment and the method for repairing the inner wall of the underground pipeline by hot melting, the inner lining pipe does not need to be preformed, and the plastic particles are hot melted in situ in the pipeline and combined, positioned and molded with the inner wall of the original pipeline; the method improves the pipeline repairing quality, reduces the pipeline repairing cost and reduces the construction amount of pipeline repairing.

The embodiment also provides a hot-melting repairing method for the inner wall of the underground pipeline, which comprises the following steps:

s1: plugging two ends of the repair area by using a plugging device;

s2: cleaning the repair area by using a cleaning device;

s3: conveying the plastic particles by a conveying device;

s4: and melting, extruding and molding the plastic particles on the inner wall of the repair area by a melting and extruding molding device to form the repair coating so as to complete the repair of the inner wall of the pipeline.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.