CN214836403U - Movable tunnel lining repairing device based on 3D printing technology - Google Patents
Movable tunnel lining repairing device based on 3D printing technology Download PDFInfo
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- CN214836403U CN214836403U CN202120803972.XU CN202120803972U CN214836403U CN 214836403 U CN214836403 U CN 214836403U CN 202120803972 U CN202120803972 U CN 202120803972U CN 214836403 U CN214836403 U CN 214836403U
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Abstract
The utility model discloses a portable tunnel lining prosthetic devices based on 3D printing technique. The device comprises a computer auxiliary module, a CT scanning module and a 3D printing module, wherein the CT scanning module is connected with the computer auxiliary module, and the computer auxiliary module is connected with the 3D printing module; the 3D printing module comprises a 3D printer, a material conveying pipe, a consumable tank and a multidirectional printing arm; the 3D printer is connected with the consumable tank through a conveying pipe, and the multidirectional printing arm is installed on the 3D printer; the end of the multi-directional printing arm can be fitted with a print head or milling cutter. The device has the advantages of high repair efficiency, material saving, economy and environmental protection; the whole repairing process does not need template support, so that the repairing period is shortened remarkably; the secondary damage to the lining is small, and after the damage is repaired, the drilled hole can be restored to the original state.
Description
Technical Field
The utility model belongs to the technical field of tunnel engineering restores and consolidates, a portable tunnel lining prosthetic devices based on 3D printing technique is related to.
Background
In recent years, the construction of expressways and high-speed railways in China is vigorously developed, and a large amount of tunnel engineering is generated. However, as the operation time of the tunnel increases, the lining segments are washed by sand and underground water in the soil layer, so that the surface performance of the lining segments is deteriorated; meanwhile, the carbonization caused by the automobile exhaust, the cement aggregate and the underground water causes the concrete to be corroded by carbonization; particularly in western severe cold areas, concrete cracks and falls off through freeze-thaw cycle change, frost heaving force caused by freezing has large influence on internal stress of the tunnel lining, so that the corrosion of the segment lining structure is aggravated, the bearing capacity of the lining structure is reduced, and the stability of the tunnel is influenced.
The existing tunnel lining repair technology mainly adopts a cement grouting method or an epoxy resin method, but the methods have long repair time, require manual operation in each link of lining repair, waste materials, slow forming and low precision, and if construction is carried out in winter, epoxy resin liquid can be frozen due to low temperature, so that the construction process is complicated. With the continuous development of scientific technology, 3D printing technology has emerged. The 3D printing technology (3DP) is a novel rapid additive technology, and its principle is to complete the forming of solid products by means of powder cohesive material layer by layer. The technology has the advantages of fast forming, high precision, material saving and the like. The repair of parts or structures by using a 3D printing technology has corresponding patents in the fields of medical treatment, machinery, aerospace and the like; in the field of tunnel engineering, at present, tunnel construction is researched more directly, but in corrosive environment and extreme environment, devices and methods for tunnel reinforcement and repair and 3D printing of tunnel linings are fewer. In a manipulator file with a milling cutter and a 3D printing head at the front end with four degrees of freedom, the printing head and the milling cutter are perpendicular to a manipulator and are not beneficial to removing corrosive substances in a reserved deformation space of a tunnel lining and surrounding rocks; the patent document discloses a method for repairing cultural relics by a 3D printing technology, which needs to print a defective part of the cultural relics and then use a bonding material to patch the defective part, but when the defective part is irregular in shape and has a cavity inside, the technology of firstly printing and then patching is not applicable. The appearance of the 3D printing technology provides a new idea for repairing the tunnel structure in the corrosive environment.
Therefore, a device and a repair and reinforcement method applicable to corrosive environments and capable of avoiding low precision of consumed time and materials are urgently needed, so as to better reduce resource waste and improve economic benefits, and the problem to be solved by the technical staff in the field is urgently needed.
Disclosure of Invention
An object of the utility model is to provide a shaping is fast, the precision is high, the consumptive material is low, and fundamentally solves the device that corrodes tunnel lining section of jurisdiction problem. The method can effectively reduce secondary repair damage of the tunnel, and is suitable for irregular members with complex sizes.
In order to achieve the above object, the utility model provides a mobile tunnel lining repairing device based on 3D printing technology, including computer auxiliary module, CT scanning module, 3D printing module, CT scanning module connects computer auxiliary module, and computer auxiliary module connects 3D printing module;
the 3D printing module comprises a 3D printer, a material conveying pipe, a consumable tank and a multidirectional printing arm; the 3D printer is connected with the consumable tank through a conveying pipe, and the multidirectional printing arm is installed on the 3D printer; the end of the multidirectional printing arm can be provided with a printing head or a milling cutter;
the multidirectional printing arm is in a hollow tubular shape, the hollow tubular shape is communicated with the conveying pipe, and the tail end of the hollow tubular shape is provided with an external thread;
one end of the printing head is a hollow sleeve, the printing head is communicated with the multidirectional printing arm, the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm; the other end of the printing head is provided with a conical hopper-shaped discharge nozzle;
one end of the milling cutter is a hollow sleeve, the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm; the other end of the milling cutter is provided with a cutter head with the thickness of 1-2mm, the width of 1-2mm and the height of 5-10 mm.
The automatic feeding device is characterized in that a feeding cavity is arranged between the printing head and the discharging nozzle, the discharging nozzle comprises a large-opening nozzle and a small-opening nozzle, the feeding cavity is a hollow cylinder, at least four small-opening nozzles are uniformly arranged on the surface of the hollow cylinder in the circumferential direction, and the large-opening nozzle is arranged at the tail end of the hollow cylinder.
The large-opening spray head is connected with the material conveying cavity, and the small-opening spray head is connected with the material conveying cavity; the diameter of the small-mouth spray head is 1/2-2/3 of the diameter of the large-mouth spray head, and the large-mouth spray head and the small-mouth spray head are in a conical hopper shape.
The wall thickness of a hollow sleeve of the printing head is 1-2 mm; the wall thickness of the hollow sleeve of the milling cutter is 1-2 mm.
And the computer auxiliary module is provided with graphic processing software and driving software of the 3D printer.
The multidirectional printing arm is at least provided with 4-joint rotary mechanical arms.
The conveying pipe is a lightproof rubber plastic hose.
The volume of the consumable tank is 0.5-1m3One end of the feeding pipe is provided with a feed inlet which can be opened and closed, the other end of the feeding pipe is connected with a valve, and the other end of the valve is connected with a feed delivery pipe.
The printing concrete is filled in the consumable tank and continuously extruded through a printing head of the multidirectional printing arm, and the 3D printer is further connected with a printing pump.
The construction steps of the mobile tunnel lining repairing method based on the 3D printing technology comprise the following work: computer auxiliary module, CT scanning module and 3D printing module
1) Scanning the damaged part of the tunnel lining segment:
the method comprises the steps of firstly scanning a tunnel lining by utilizing a CT scanning module, determining a damaged part of a lining segment, establishing a DICOM (digital imaging and communications in medicine) format damage state diagram of the damaged part of the lining by combining a CT three-dimensional imaging technology, so that the interface of a lining corrosion area and a non-corrosion area can be distinguished, detecting the interface of the corrosion area and the non-corrosion area of a detected object under the condition of not damaging a tunnel lining segment, and determining the damaged part of the lining segment; establishing a DICOM format damage state diagram according to CT three-dimensional imaging technology, and converting the damage state diagram into a 3D printer STL file executable by a computer auxiliary module;
2) and (3) drilling and repairing the lining segment:
drilling holes in the inner wall of the lining in the radial direction, wherein the drilling positions are usually 5-9cm away from the damaged part, the drilling diameters are usually set to be 3-5cm, then a milling cutter is installed on the multidirectional printing arm, the multidirectional printing arm is guided to extend into the drilled holes through controlling a computer auxiliary module until all three bearing joints at the tail end of the multidirectional printing arm enter a reserved deformation space between the lining and the surrounding rock, and removing the corrosive on the lining segment; after the removal is finished, the milling cutter is detached, a printing head is installed on the multidirectional printing arm, so that the printing head can spray the configured printing concrete to the damaged part of the lining, and the lining is repaired layer by layer until the lining is restored to the state before damage;
3) reducing and drilling:
after the repair is finished, operating the computer auxiliary module again to guide the multidirectional printing arm to exit from the drilled hole; the printing consumables are sprayed on the inner wall of the drilled hole by the printing head until the drilled hole is restored to the state before drilling, and secondary damage of construction operation to the tunnel is reduced.
The hole is radially drilled from the inner wall 5-9cm away from the damaged part of the lining, the multidirectional printing arm is guided to extend into the drilled hole through the operation of the computer auxiliary module until all three bearing joints at the front end of the multidirectional printing arm enter the reserved deformation space between the lining and the surrounding rock, so that the multidirectional printing arm can more flexibly and easily remove corrosive substances in the limited reserved deformation space.
The computer auxiliary module is used for removing corrosive substances at the damaged part of the lining layer by controlling the multidirectional printing arm and utilizing a milling cutter arranged at the end part of the multidirectional printing arm; and a DICOM format damage state diagram of the lining damage part after the corrosive is removed is displayed by combining with a CT three-dimensional imaging technology.
And the displayed damage state diagram is imported into a computer auxiliary module, the DICOM-format damage state diagram is converted into an STL file, and the STL file is further sliced and processed into an executable file of the 3D printing system.
The 3D printer is connected with the consumable tank through a conveying pipeline, the multidirectional printing arm is controlled by the aid of the computer auxiliary module according to the generated DICOM format damage state diagram, the configured printing concrete is sprayed to the damaged part of the lining through the printing head, and the lining is repaired layer by layer until the lining is restored to the state before damage.
The printing concrete is made of printing consumables, such as sand, cementing materials (CEM I52.5 cement, fly ash and silica fume), water, various additives (superplasticizer, retarder and accelerating agent) and a certain amount of polypropylene fiber, and meets the early strength of the printing concrete during accelerating setting; the printing concrete can be continuously sprayed out through the printing heads of the multidirectional printing arms, the sprayed concrete filaments are bonded into a concrete layer, and the concrete layer is vertically bonded to form a concrete member; need not concrete support mould at whole in-process, store the printing consumables that the configuration is good in the consumptive material jar at last and keep airtight.
After the damaged part of the lining is repaired, the multidirectional printing arm is guided to exit from the drilled hole by operating the computer auxiliary module; and operating the computer auxiliary module again to guide the multidirectional printing arm, and spraying printing consumables on the inner wall of the drill hole by using the printing head until the drill hole is restored to the state before drilling.
A portable tunnel lining prosthetic devices based on 3D printing technique still carries the component including removing, remove and carry and install computer auxiliary module, CT scanning module, 3D printing module on the component, realize the portable restoration to tunnel lining.
A portable tunnel lining prosthetic devices based on 3D printing technique, its beneficial effect lies in:
1. the utility model relates to a movable tunnel lining repairing device based on 3D printing technology and application mode, which can design corresponding damage repairing parameters according to the actual damage condition on site, thereby realizing the accurate repairing of the damaged part of the lining;
2. compared with the existing repairing method, the utility model has the advantages of high repairing efficiency, material saving, economy and environmental protection;
3. the printing consumables have the characteristics of early strength and rapid hardening, a continuous extrusion mode is adopted, template support is not needed in the whole repairing process, and the repairing construction period is obviously shortened;
4. repairing the damaged part, namely only drilling a 3-5cm drill hole on the lining, so that secondary damage to the lining is small, and the drill hole can be restored to the original shape after the damage is repaired;
5. the utility model discloses an used equipment material can mass production, and is high efficiency, colludes with the building industrialization theory mutually.
Drawings
FIG. 1 is a device connection diagram;
FIG. 2 is a schematic view of a print arm;
FIG. 3 is a schematic view of a printhead;
FIG. 4 is a schematic view of a milling cutter;
FIG. 5 is a flow chart showing the steps of the construction method of the present apparatus;
in the figure: the system comprises a computer auxiliary module, a 2-3D printer, a 3-CT scanning module, a material conveying pipe, a consumable tank 5, a multidirectional printing arm 6, a printing head 7 and a milling cutter 8.
Detailed Description
Example 1
As shown in fig. 1-5, the utility model relates to a mobile tunnel lining repairing device based on 3D printing technology, which comprises a computer auxiliary module 1, a CT scanning module 3 and a 3D printing module, wherein the CT scanning module 3 is connected with the computer auxiliary module 1, and the computer auxiliary module 1 is connected with the 3D printing module;
the 3D printing module comprises a 3D printer 2, a material conveying pipe 4, a consumable tank 5 and a multidirectional printing arm 6; the 3D printer 2 is connected with a consumable tank 5 through a material conveying pipe 4, and the multidirectional printing arm 6 is installed on the 3D printer 2; the end of the multidirectional printing arm 6 can be provided with a printing head 7 or a milling cutter 8;
the multidirectional printing arm 6 is in a hollow tubular shape, the hollow tubular shape is communicated with the material conveying pipe 4, and the tail end of the hollow tubular shape is provided with an external thread;
one end of the printing head 7 is a hollow sleeve, the printing head 7 is communicated with the multidirectional printing arm 6, the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm 6; the other end of the printing head 7 is provided with a conical hopper-shaped discharge nozzle;
one end of the milling cutter 8 is a hollow sleeve, the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm 6; the other end of the milling cutter 8 is provided with a cutter head with the thickness of 1-2mm, the width of 1-2mm and the height of 5-10 mm.
The automatic feeding device is characterized in that a material conveying cavity is arranged between the printing head 7 and the discharging nozzle, the discharging nozzle comprises a large-opening nozzle and a small-opening nozzle, the material conveying cavity is a hollow cylinder, four small-opening nozzles are uniformly arranged on the surface of the hollow cylinder in the circumferential direction, and the large-opening nozzle is installed at the tail end of the hollow cylinder.
The large-opening spray head is connected with the material conveying cavity, and the small-opening spray head is connected with the material conveying cavity; the diameter of the small-opening nozzle is 1/2 of the diameter of the large-opening nozzle, and the large-opening nozzle and the small-opening nozzle are in a conical hopper shape.
The wall thickness of a hollow sleeve of the printing head 7 is 1-2 mm; the wall thickness of the hollow sleeve of the milling cutter 8 is 1-2 mm.
The computer auxiliary module 1 is provided with graphic processing software and driving software of the 3D printer 2.
The multi-directional printing arm 6 is provided with at least 4 joint rotary mechanical arms.
The material conveying pipe 4 is a lightproof rubber plastic hose.
The volume of the consumable tank 5 is 0.5-1m3One end of the feeding pipe is provided with a feed inlet which can be opened and closed, the other end of the feeding pipe is connected with a valve, and the other end of the valve is connected with a feed delivery pipe 4.
The printing concrete is filled in the consumable tank 5, the printing concrete is continuously extruded out through the printing head 7 of the multidirectional printing arm 6, and the 3D printer 2 is further connected with a printing pump.
A portable tunnel lining repair method based on 3D printing technique, its construction step includes following step:
1, scanning a damaged part of a tunnel lining segment:
detecting an interface between a corroded area and a non-corroded area of a detected object by using a CT scanning module 3 under the condition of not damaging a tunnel lining segment, and determining a damaged part of the lining segment; and a DICOM format damage state diagram is established according to the CT three-dimensional imaging technology and converted into a 3D printer STL file which can be executed by the computer auxiliary module 1;
(2) and (3) drilling and repairing the lining segment:
drilling holes in the radial direction from the inner wall of the lining, wherein the drilling hole position is usually 5-9cm away from a damaged part, the drilling hole diameter is usually set to be 3-5cm, then a milling cutter 8 is installed on the multidirectional printing arm 6, the multidirectional printing arm 6 is guided to extend into the drilling holes through controlling the computer auxiliary module 1 until three bearing joints at the tail end of the multidirectional printing arm 6 are all drilled into a reserved deformation space between the lining and the surrounding rock, and removing corrosion on the lining segment; after the removal is finished, the milling cutter 8 is detached, the printing head 7 is installed on the multidirectional printing arm 6, so that the prepared printing concrete is sprayed to the damaged part of the lining, and the lining is repaired layer by layer until the lining is restored to the state before damage;
(3) reducing and drilling:
after the repair is finished, the computer auxiliary module 1 is operated again to guide the multidirectional printing arm 6 to exit from the drilling hole; the printing consumables are sprayed on the inner wall of the drilled hole by the printing head 7 until the drilled hole is restored to the state before drilling, so that the secondary damage of construction operation to the tunnel is reduced.
Claims (8)
1. The utility model provides a portable tunnel lining prosthetic devices based on 3D printing technique which characterized in that: the system comprises a computer auxiliary module (1), a CT scanning module (3) and a 3D printing module, wherein the CT scanning module (3) is connected with the computer auxiliary module (1), and the computer auxiliary module (1) is connected with the 3D printing module;
the 3D printing module comprises a 3D printer (2), a material conveying pipe (4), a consumable tank (5) and a multidirectional printing arm (6); the 3D printer (2) is connected with the consumable tank (5) through the material conveying pipe (4), and the multidirectional printing arm (6) is installed on the 3D printer (2); the end of the multi-directional printing arm (6) can be provided with a printing head (7) or a milling cutter (8);
the multidirectional printing arm (6) is in a hollow tubular shape, the hollow tubular shape is communicated with the material conveying pipe (4), and the tail end of the hollow tubular shape is provided with an external thread;
one end of the printing head (7) is a hollow sleeve, the printing head (7) is communicated with the multidirectional printing arm (6), the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm (6); the other end of the printing head (7) is provided with a conical hopper-shaped discharge nozzle;
one end of the milling cutter (8) is a hollow sleeve, the inner wall of the hollow sleeve is provided with internal threads, and the internal threads are matched with external threads arranged at the tail end of the multidirectional printing arm (6); the other end of the milling cutter (8) is provided with a cutter head with the thickness of 1-2mm, the width of 1-2mm and the height of 5-10 mm.
2. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 1, wherein: the automatic feeding device is characterized in that a material conveying cavity is arranged between the printing head (7) and the discharging nozzle, the discharging nozzle comprises a large-opening nozzle and a small-opening nozzle, the material conveying cavity is a hollow cylinder, at least four small-opening nozzles are uniformly arranged on the surface of the hollow cylinder in the circumferential direction, and the large-opening nozzle is arranged at the tail end of the hollow cylinder.
3. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 2, wherein: the large-opening spray head is connected with the material conveying cavity, and the small-opening spray head is connected with the material conveying cavity; the diameter of the small-mouth spray head is 1/2-2/3 of the diameter of the large-mouth spray head, and the large-mouth spray head and the small-mouth spray head are in a conical hopper shape.
4. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 3, wherein: the wall thickness of a hollow sleeve of the printing head (7) is 1-2 mm; the wall thickness of the hollow sleeve of the milling cutter (8) is 1-2 mm.
5. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 4, wherein: the multidirectional printing arm (6) is at least provided with 4-joint rotary mechanical arms.
6. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 5, wherein: the material conveying pipe (4) is a lightproof rubber plastic hose.
7. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 6, wherein: the volume of the consumable tank (5) is 0.5-1m3One end of the feeding pipe is provided with a feed inlet which can be opened and closed, the other end of the feeding pipe is connected with a valve, and the other end of the valve is connected with a feed delivery pipe (4).
8. The mobile tunnel lining repair device based on the 3D printing technology as claimed in claim 7, wherein: the printing concrete is filled in the consumable tank (5), the printing concrete is continuously extruded out through a printing head (7) of the multidirectional printing arm (6), and the 3D printer (2) is further connected with a printing pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120803972.XU CN214836403U (en) | 2021-04-20 | 2021-04-20 | Movable tunnel lining repairing device based on 3D printing technology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120803972.XU CN214836403U (en) | 2021-04-20 | 2021-04-20 | Movable tunnel lining repairing device based on 3D printing technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182589A (en) * | 2021-12-29 | 2022-03-15 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for rapidly repairing damage of sleeper of heavy haul railway |
| CN114482599A (en) * | 2022-01-13 | 2022-05-13 | 成都建工路桥建设有限公司 | Automatic repairing machine for defects of underground overlong structure and using method thereof |
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2021
- 2021-04-20 CN CN202120803972.XU patent/CN214836403U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114182589A (en) * | 2021-12-29 | 2022-03-15 | 中国铁道科学研究院集团有限公司铁道建筑研究所 | Method for rapidly repairing damage of sleeper of heavy haul railway |
| CN114482599A (en) * | 2022-01-13 | 2022-05-13 | 成都建工路桥建设有限公司 | Automatic repairing machine for defects of underground overlong structure and using method thereof |
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