CN112756239A - Polyurethane spraying forming process for inner wall of concrete pipeline - Google Patents
Polyurethane spraying forming process for inner wall of concrete pipeline Download PDFInfo
- Publication number
- CN112756239A CN112756239A CN202110058951.4A CN202110058951A CN112756239A CN 112756239 A CN112756239 A CN 112756239A CN 202110058951 A CN202110058951 A CN 202110058951A CN 112756239 A CN112756239 A CN 112756239A
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- Prior art keywords
- concrete
- wall
- polyurethane
- concrete pipeline
- pipeline
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- 239000004567 concrete Substances 0.000 title claims abstract description 135
- 229920002635 polyurethane Polymers 0.000 title claims abstract description 42
- 239000004814 polyurethane Substances 0.000 title claims abstract description 42
- 238000005507 spraying Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 title claims abstract description 26
- 239000000428 dust Substances 0.000 claims abstract description 26
- 238000005498 polishing Methods 0.000 claims abstract description 20
- 238000004140 cleaning Methods 0.000 claims abstract description 12
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 13
- 239000011496 polyurethane foam Substances 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 9
- 238000000576 coating method Methods 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 239000011527 polyurethane coating Substances 0.000 claims description 6
- 230000032258 transport Effects 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 3
- 239000011378 shotcrete Substances 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 239000004568 cement Substances 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 238000009718 spray deposition Methods 0.000 claims 4
- 238000007517 polishing process Methods 0.000 claims 1
- 230000007547 defect Effects 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract description 4
- 238000007493 shaping process Methods 0.000 abstract description 2
- 239000011083 cement mortar Substances 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000003487 anti-permeability effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005536 corrosion prevention Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000009991 scouring Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/22—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes
- B05D7/222—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials to internal surfaces, e.g. of tubes of pipes
- B05D7/225—Coating inside the pipe
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B13/00—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00
- B05B13/06—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies
- B05B13/0645—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation
- B05B13/0654—Machines or plants for applying liquids or other fluent materials to surfaces of objects or other work by spraying, not covered by groups B05B1/00 - B05B11/00 specially designed for treating the inside of hollow bodies the hollow bodies being rotated during treatment operation and a treating nozzles being translated through the hollow bodies in a direction essentially parallel to the rotational axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/20—Arrangements for spraying in combination with other operations, e.g. drying; Arrangements enabling a combination of spraying operations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/08—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D7/00—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials
- B05D7/24—Processes, other than flocking, specially adapted for applying liquids or other fluent materials to particular surfaces or for applying particular liquids or other fluent materials for applying particular liquids or other fluent materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D2503/00—Polyurethanes
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
Abstract
The invention relates to a forming process for spraying polyurethane on the inner wall of a concrete pipe, which finishes the continuous forming process of spraying the polyurethane on the inner wall of the concrete pipe by sequentially passing a large-caliber concrete pipe through an inner wall polishing station, an inner wall dust cleaning station, a preheating station, a polyurethane inner wall spraying station and a finished pipe curing station. Because polyurethane has advantages such as wear-resisting, corrosion-resistant, resistance coefficient is little, carries out polyurethane spraying shaping to the concrete pipe inner wall, can compensate the concrete pipe inner wall resistance coefficient big, defect such as corrosion-resistant.
Description
Technical Field
The invention relates to a polyurethane spraying and forming process for an inner wall of a concrete pipe, and belongs to the technical field of corrosion prevention and resistance reduction of concrete pipelines.
Background
The concrete pipe is widely applied to long-line water conveying pipelines after 30 years of development process, the inner wall of the concrete pipe is only protected against corrosion by cement mortar, the cement mortar has poor corrosion resistance and low strength, and moreover, the impermeability of the cement mortar is not good; the concrete pipe is manufactured by using a mould, so that quality defects such as air holes and the like are inevitably generated on the inner wall of the concrete pipe, and the defects need to be repaired by manually using epoxy mortar. The inner wall of the concrete pipe is rough, the resistance is large when long-distance water delivery is carried out, and the energy consumption is high.
Disclosure of Invention
The invention aims to provide a polyurethane spraying and forming process for the inner wall of a concrete pipeline, which overcomes the technical defects that the inner wall of the traditional concrete pipeline is easy to corrode and generates air holes and needs manual repair.
In order to realize the purpose, the invention adopts the technical scheme that: a polyurethane spraying and forming process for an inner wall of a concrete pipeline comprises the following steps: s1: conveying the finished concrete pipeline to an inner wall polishing station by a pipeline conveying trolley to remove concrete bulges on the inner wall of the concrete pipeline or concrete residues on a mould; s2: conveying the concrete pipeline to an inner wall dust cleaning station by a pipeline conveying trolley, and cleaning the inner wall of the polished concrete pipeline with dust; s3: conveying the concrete pipeline to a preheating station by a pipeline conveying trolley, and preheating the inner surface and the outer surface of the concrete pipeline in a heating mode to meet the temperature requirement of polyurethane spraying; s4: conveying the concrete pipeline meeting the spraying temperature requirement to a polyurethane foam spraying station by a pipe conveying trolley, and driving a gun rod provided with a polyurethane spray gun to penetrate into the inner wall of the gun rod to finish spraying operation by a polyurethane spraying travelling trolley; s5: and placing the sprayed concrete pipeline to a curing station by using a pipe conveying trolley for maintenance and curing.
In the above scheme, in step S1, be provided with first rotary device on the inner wall station of polishing, the fortune pipe dolly transports the concrete pipe to first rotary device on, first rotary device drives the concrete pipe rotatory, at the rotatory in-process of concrete pipe, the inner wall that is located the cantilever type head of polishing of concrete pipe one end is polished the walking dolly and is walked slowly and stretch the head of polishing to the inside wall of cement pipe and polish, the dust collection device that is located the other end of concrete pipe carries out recovery processing with the dust that produces of polishing in-process.
In the above scheme, in step S2, be provided with the second rotary device on the inner wall dust clearance station, the fortune pipe dolly transports concrete pipe to the second rotary device on, the second rotary device drives concrete pipe rotatory, at the rotatory in-process of concrete pipe, the high pressure centrifugal fan walking dolly that is located concrete pipe one end extends the barral of a gun inside the concrete pipe, the wind pressure that high pressure centrifugal fan produced stretches into concrete pipe inner wall through the barral of a gun, the subsidiary dust of concrete pipe inner wall floats under high pressure centrifugal fan' S the blowing, filter the recovery by arranging the collection dirt collection box at the concrete pipe other end, in order to reach emission standard.
In the scheme, in the step S3, the preheating station is provided with a burner and a heat preservation furnace body; the heat generated by the burner makes the temperature in the heat preservation furnace body constant at the set temperature all the time so as to remove the moisture on the surface of the concrete pipe and meet the requirements of the polyurethane spraying process.
In the scheme, the temperature range in the heat preservation furnace body is 40-45 ℃.
In the above scheme, in step S4, a third rotating device is arranged on the polyurethane spraying station, the pipe transporting trolley transports the concrete pipeline to the third rotating device, the third rotating device drives the concrete pipeline to rotate, the polyurethane spraying traveling trolley located at one end of the concrete pipeline travels the cantilever type spray gun back and forth in the concrete pipeline at a set speed in the rotating process of the concrete pipeline, and polyurethane paint sprayed by the cantilever type spray gun is stacked on the concrete pipeline layer by layer.
In the scheme, the thickness of the polyurethane coating on the concrete pipeline is 2-3 mm.
The invention also provides a concrete pipeline inner wall polyurethane spraying and forming system, which comprises a pipe conveying trolley: the pipeline is used for conveying finished concrete; inner wall polishing station: the device is used for removing concrete bulges on the inner wall of the concrete pipeline or concrete residues on the mould; inner wall dust cleaning station: the dust cleaning device is used for cleaning dust on the inner wall of the polished concrete pipeline; preheating a station: the device is used for preheating the inner surface and the outer surface of the concrete pipeline to meet the temperature requirement of polyurethane spraying; polyurethane foam spraying station: the polyurethane coating is used for coating the inner surface of the concrete pipeline in a layered manner; curing station: the curing agent is used for curing the concrete pipeline sprayed with polyurethane.
The advantages and the beneficial effects of the invention are as follows: (1) the invention is suitable for any form of concrete pipe with medium and large caliber; (2) the polyurethane foam formed by the invention has the advantages of smooth and uniform thickness, no defects of cavities and the like in the coating, and capability of making up the quality defect of more air holes of concrete. (3) The polyurethane foam coating formed by the invention has the advantages of good anti-permeability, high adhesive force, wear resistance and the like; (4) the inner wall of the concrete pipeline is sprayed with a layer of polyurethane foam, so that the manual repairing process can be avoided, and the polyurethane foam can be automatically filled in defective parts such as air holes. Because of the characteristics of polyurethane, the polyurethane foam can make up for the quality defect, can also reduce the resistance when long distance water delivery, and is resistant to scouring and wearing. (5) The sprayed polyurethane foam has the advantages of uniform density, good air tightness and basically consistent thickness, and the polyurethane foam can be filled in air holes on the inner wall of the concrete pipe, so that cavities and coating defects under the coating can not be formed.
Drawings
FIG. 1 is a process flow diagram of the present invention.
In the figure: 1 concrete pipe, 2 fortune pipe dollies, 3 buffer memory racks, 4 dust collection device, 5 first rotary device, 6 inner walls walking dollies of polishing, 7 high-pressure centrifugal fan walking dollies, 8 second rotary device, 9 collection dirt collection box, 10 heat preservation furnace bodies, 11 combustors, 12 polyurethane spraying walking dollies, 13 third rotary device, 14 waste gas collection device, 15 curing racks.
Detailed Description
The process of the present invention will be further described with reference to the accompanying drawings.
The technical process of the embodiment is achieved by the following measures: 1. inspecting the inner and outer surfaces of the concrete pipe; 2. polishing the inner wall of the concrete pipe to remove foreign matters, impurities and the like on the inner surface; 3. the interior of the concrete pipe is cleaned up by the high-pressure centrifugal fan; 4. the concrete pipe is transversely conveyed by a pipe conveying trolley; 5. preheating a concrete pipe to 40-45 ℃ through a heating furnace; 6. the walking trolley extends the cantilever gun rod with the spraying device to the inner wall of the concrete at a specific speed, the rotating speed of the concrete pipe rotating device is matched with the walking speed of the walking trolley, and the polyurethane coating is uniformly sprayed on the inner wall of the concrete pipe and has a stroke of 2-3 mm; 7. placing the sprayed concrete pipe on a curing rack for curing and shaping by using a pipe conveying trolley; 8. and (5) checking and accepting to form a final product.
Example (b): the embodiment provides a forming process for polyurethane spraying on the inner wall of a concrete pipe with DN600-DN4000mm caliber. As shown in fig. 1, the process comprises the following steps: the concrete pipeline 1 which is qualified through inspection is conveyed to a first rotating device 5 of an inner wall polishing station by a pipe conveying trolley 2 positioned on a cache rack 3, and the first rotating device 5 is driven by a motor reducer to realize the rotation of the concrete pipeline 1; the inner wall polishing walking trolley 6 provided with the cantilever polishing head is started, the cantilever polishing head is slowly extended into the concrete pipeline 1, and meanwhile, the dust collecting device 4 at the other end of the concrete pipeline 1 seals one end of the concrete pipeline to prevent dust from overflowing; the concrete pipe is to accomplish the back at the inner wall station of polishing, fortune pipe dolly 2 transports concrete pipe 1 to the second rotary device 8 of inner wall dust clearance station, second rotary device 8 is driven by motor reducer, when the concrete pipe is rotatory, install high-pressure centrifugal fan's high-pressure centrifugal fan walking dolly 7 and start, the rifle bar that will connect high-pressure centrifugal fan slowly gets into the concrete pipe inner wall, clear up its inner wall dust, the fan on the collection dirt collection tank 9 of the other end starts, seal the concrete pipe other end, prevent that the dust is excessive. After the dust on the inner wall of the concrete pipeline is cleaned, the concrete pipeline is conveyed to the heat preservation furnace body 10 by the pipe conveying trolley for drying and heating, and the combustor 11 provides heat for the heat preservation furnace body 10. After the inner surface and the outer surface of the concrete pipeline reach the set temperature of 40-45 ℃, the inner surface and the outer surface of the concrete pipeline are conveyed to a third rotating device 13 of a polyurethane spraying station by a pipe conveying trolley 2, a motor speed reducer is started, a polyurethane spraying walking trolley 12 with cantilever spraying equipment is started while the concrete pipeline rotates, a spray gun rod with a spray gun is driven to slowly enter the interior of the concrete pipeline, the spray gun is started, the spraying of polyurethane foam is completed, and the thickness of the polyurethane coating on the concrete pipeline is ensured to be 2-3 mm. And a waste gas collecting device 14 is arranged on the concrete pipeline at the other end, and waste gas in the coating process is recovered. Finally, the concrete pipeline 1 is placed on a curing rack 15 by a pipe conveying trolley for curing, and polyurethane foam with a certain thickness is formed after curing.
Claims (8)
1. A polyurethane spraying forming process for an inner wall of a concrete pipeline is characterized by comprising the following steps:
s1: conveying the finished concrete pipeline (1) to an inner wall polishing station by a pipe conveying trolley (2) to remove concrete bulges on the inner wall of the concrete pipeline (1) or concrete residues on a mould;
s2: conveying the concrete pipeline (1) to an inner wall dust cleaning station by using a pipe conveying trolley (2), and cleaning the dust on the inner wall of the polished concrete pipeline (1);
s3: the concrete pipeline (1) is conveyed to a preheating station by the pipe conveying trolley (2), and the inner surface and the outer surface of the concrete pipeline (1) are preheated in a heating mode, so that the temperature requirement of polyurethane spraying is met;
s4: the pipe conveying trolley (2) conveys the concrete pipeline meeting the spraying temperature requirement to a polyurethane foam spraying station, and the polyurethane spraying walking trolley (12) drives a gun rod provided with a polyurethane spray gun to penetrate into the inner wall of the gun rod to finish spraying operation;
s5: and placing the sprayed concrete pipeline to a curing station by using the pipe conveying trolley (2) for maintenance and curing.
2. The polyurethane spraying and forming process for the inner wall of the concrete pipeline according to claim 1, wherein in the step S1, a first rotating device (5) is arranged on the inner wall polishing station, the pipe conveying trolley (2) conveys the concrete pipeline (1) to the first rotating device (5), the first rotating device (5) drives the concrete pipeline (1) to rotate, in the rotating process of the concrete pipeline (1), the inner wall polishing trolley (6) of the cantilever type polishing head at one end of the concrete pipeline (1) slowly travels and extends the polishing head to the inside of the cement pipeline to polish the inner wall, and the dust collecting device (4) at the other end of the concrete pipeline (1) recovers and treats dust generated in the polishing process.
3. The polyurethane spray-forming process for the inner wall of the concrete pipe according to claim 1, it is characterized in that in the step S2, a second rotating device (8) is arranged on the inner wall dust cleaning station, the pipe conveying trolley (2) conveys the concrete pipeline (1) to the second rotating device (8), the second rotating device (8) drives the concrete pipeline (1) to rotate, at concrete pipe (1) rotatory in-process, be located that high pressure centrifugal fan walking dolly (7) of concrete pipe (1) one end extend the barral of a gun inside the concrete pipe, the wind pressure that high pressure centrifugal fan produced stretches into to concrete pipe inner wall through the barral of a gun, the subsidiary dust of concrete pipe inner wall floats under high pressure centrifugal fan's the blowing, filter the recovery by arranging collection dirt collection box (9) at the concrete pipe (1) other end, in order to reach emission standard.
4. The polyurethane spray forming process for the inner wall of the concrete pipeline according to claim 1, wherein in step S3, the preheating station is provided with a burner (11) and a heat preservation furnace body (10); the heat generated by the burner (11) ensures that the temperature in the heat-preserving furnace body (10) is always kept constant at the set temperature so as to remove the moisture on the surface of the concrete pipe and meet the requirements of a polyurethane spraying process.
5. The polyurethane spray forming process for the inner wall of the concrete pipeline according to claim 4, wherein the temperature range in the heat preservation furnace body (10) is 40-45 ℃.
6. The polyurethane spraying and forming process for the inner wall of the concrete pipeline according to claim 1, wherein in step S4, a third rotating device (13) is arranged on the polyurethane spraying station, the pipe transporting trolley (2) transports the concrete pipeline (1) to the third rotating device (13), the third rotating device (13) drives the concrete pipeline (1) to rotate, in the rotating process of the concrete pipeline (1), the polyurethane spraying traveling trolley (12) located at one end of the concrete pipeline (1) enables the cantilever type spray gun to travel back and forth in the concrete pipeline (1) at a set speed, and polyurethane paint sprayed by the cantilever type spray gun is stacked on the concrete pipeline (1) layer by layer.
7. The polyurethane spray forming process for the inner wall of the concrete pipeline as claimed in claim 6, wherein the thickness of the polyurethane coating on the concrete pipeline (1) is 2-3 mm.
8. A concrete pipeline inner wall polyurethane spraying forming system is characterized by comprising
Pipe conveying trolley (2): for transporting the finished concrete pipe (1);
inner wall polishing station: the device is used for removing concrete bulges on the inner wall of the concrete pipeline (1) or concrete residues on a mould;
inner wall dust cleaning station: the dust cleaning device is used for cleaning dust on the inner wall of the polished concrete pipeline (1);
preheating a station: the preheating device is used for preheating the inner surface and the outer surface of the concrete pipeline (1) to meet the temperature requirement of polyurethane spraying;
polyurethane foam spraying station: the coating is used for coating the polyurethane coating on the inner surface of the concrete pipeline (1) in a layered manner;
curing station: used for maintaining and curing the concrete pipeline (1) sprayed with polyurethane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058951.4A CN112756239A (en) | 2021-01-17 | 2021-01-17 | Polyurethane spraying forming process for inner wall of concrete pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110058951.4A CN112756239A (en) | 2021-01-17 | 2021-01-17 | Polyurethane spraying forming process for inner wall of concrete pipeline |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112756239A true CN112756239A (en) | 2021-05-07 |
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ID=75702318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110058951.4A Pending CN112756239A (en) | 2021-01-17 | 2021-01-17 | Polyurethane spraying forming process for inner wall of concrete pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112756239A (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4559239A (en) * | 1982-02-01 | 1985-12-17 | Cenegy Louis F | Method for repairing cementitious substrate |
| EP0913238A1 (en) * | 1997-11-03 | 1999-05-06 | CO. PRE.M costruzioni Prefabbricate Modulari s.r.l. | Method for producing a polyurethane pipe inside a concrete pipe, and composite product thus obtained |
| CN2392616Y (en) * | 1999-08-27 | 2000-08-23 | 中国农业机械化科学研究院 | Multi-component spray coating device for internal wall of tube |
| CN101244417A (en) * | 2008-03-31 | 2008-08-20 | 南京橡塑机械厂有限公司 | Method for processing internal wall of heavy caliber air transmission steel tube |
| CN101758013A (en) * | 2009-11-06 | 2010-06-30 | 新兴铸管股份有限公司 | Process for spraying polyurethane on inner wall of nodular cast iron pipe |
| CN204976218U (en) * | 2015-08-01 | 2016-01-20 | 广西安钢永通铸管管业有限公司 | Environment -friendly nodular cast -iron pipe inner wall clean -up equipment that polishes |
| CN205504241U (en) * | 2016-04-08 | 2016-08-24 | 成都本邦路桥新材料有限公司 | Reinforced concrete pipeline structure |
| CN106824638A (en) * | 2015-07-24 | 2017-06-13 | 安徽工业大学 | A kind of metal pipe internal wall spraying coating process |
| CN107097442A (en) * | 2017-04-14 | 2017-08-29 | 唐山兴邦管道工程设备有限公司 | A kind of polyurethane coating polyethylene winding insulating tube manufacturing equipment and manufacturing process |
| CN208527028U (en) * | 2018-06-07 | 2019-02-22 | 兖州煤业股份有限公司 | A kind of inner wall of the pipe wear-and corrosion-resistant layer spray equipment |
| CN209960024U (en) * | 2019-04-19 | 2020-01-17 | 厦门利洁源建筑废土资源再生处置有限公司 | Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe |
| CN110860449A (en) * | 2019-11-18 | 2020-03-06 | 向继卿 | Manufacturing process of glass flake lining concrete composite pipe |
-
2021
- 2021-01-17 CN CN202110058951.4A patent/CN112756239A/en active Pending
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4559239A (en) * | 1982-02-01 | 1985-12-17 | Cenegy Louis F | Method for repairing cementitious substrate |
| EP0913238A1 (en) * | 1997-11-03 | 1999-05-06 | CO. PRE.M costruzioni Prefabbricate Modulari s.r.l. | Method for producing a polyurethane pipe inside a concrete pipe, and composite product thus obtained |
| CN2392616Y (en) * | 1999-08-27 | 2000-08-23 | 中国农业机械化科学研究院 | Multi-component spray coating device for internal wall of tube |
| CN101244417A (en) * | 2008-03-31 | 2008-08-20 | 南京橡塑机械厂有限公司 | Method for processing internal wall of heavy caliber air transmission steel tube |
| CN101758013A (en) * | 2009-11-06 | 2010-06-30 | 新兴铸管股份有限公司 | Process for spraying polyurethane on inner wall of nodular cast iron pipe |
| CN106824638A (en) * | 2015-07-24 | 2017-06-13 | 安徽工业大学 | A kind of metal pipe internal wall spraying coating process |
| CN204976218U (en) * | 2015-08-01 | 2016-01-20 | 广西安钢永通铸管管业有限公司 | Environment -friendly nodular cast -iron pipe inner wall clean -up equipment that polishes |
| CN205504241U (en) * | 2016-04-08 | 2016-08-24 | 成都本邦路桥新材料有限公司 | Reinforced concrete pipeline structure |
| CN107097442A (en) * | 2017-04-14 | 2017-08-29 | 唐山兴邦管道工程设备有限公司 | A kind of polyurethane coating polyethylene winding insulating tube manufacturing equipment and manufacturing process |
| CN208527028U (en) * | 2018-06-07 | 2019-02-22 | 兖州煤业股份有限公司 | A kind of inner wall of the pipe wear-and corrosion-resistant layer spray equipment |
| CN209960024U (en) * | 2019-04-19 | 2020-01-17 | 厦门利洁源建筑废土资源再生处置有限公司 | Seawater corrosion resistant pipe-based integrated reinforced concrete special-shaped composite pipe |
| CN110860449A (en) * | 2019-11-18 | 2020-03-06 | 向继卿 | Manufacturing process of glass flake lining concrete composite pipe |
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Application publication date: 20210507 |
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