CN111688095A - Spraying and winding forming production line and production process for pipeline anti-corrosion heat insulation layer heat preservation layer - Google Patents
Spraying and winding forming production line and production process for pipeline anti-corrosion heat insulation layer heat preservation layer Download PDFInfo
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- CN111688095A CN111688095A CN202010489426.3A CN202010489426A CN111688095A CN 111688095 A CN111688095 A CN 111688095A CN 202010489426 A CN202010489426 A CN 202010489426A CN 111688095 A CN111688095 A CN 111688095A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
- B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/34—Auxiliary operations
- B29C44/36—Feeding the material to be shaped
- B29C44/46—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length
- B29C44/50—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying
- B29C44/52—Feeding the material to be shaped into an open space or onto moving surfaces, i.e. to make articles of indefinite length using pressure difference, e.g. by extrusion or by spraying between moving surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Thermal Insulation (AREA)
Abstract
The invention relates to a spraying and winding forming production line and a production process for a pipeline anticorrosion heat insulation layer, which comprises a polyurethane spraying machine, a foam pipe curing area, a polyethylene protection layer winding production line, an interrupted foam layer spraying production line and a continuous foam layer spraying production line. The invention is suitable for forming heavy-duty pipelines and thickened foam layers, has high work efficiency, investment saving, high equipment utilization rate and guaranteed product percent of pass, and one production line meets the production requirements of the market.
Description
Technical Field
The invention belongs to the technical field of forming of composite structures of anti-corrosion and heat-insulation layers of pipelines, and particularly relates to a spraying and winding forming production line and a production process for an anti-corrosion and heat-insulation layer of a steel pipeline.
Background
The best heat-insulating layer structure of the buried long-distance pipeline is a polyurethane foam layer composite polyethylene protective layer, the best forming mode is a spraying winding method, and the current modes are as follows: the method has the advantages that the heat-insulating layer forming of heavy load (the weight per meter reaches 1 ton), large-diameter pipelines (the diameter reaches phi 1620 mm) and thick foam layers (larger than 80 mm) is completely met, the foam layer spraying is carried out aiming at middle and small-diameter pipelines, the working time of the upper and lower pipes of a discontinuous pipe conveying trolley, the centering and clamping of the pipelines and the like is the same as that of the large-diameter pipelines, and the spraying efficiency is low. Secondly, winding and forming after continuous spraying (Chinese patents CN 208392700U and CN 209920572U), connecting the tail ends of the pipe heads of the steel pipes to be sprayed, continuously transmitting the tail ends of the pipe heads to pass through a foam spraying station, and continuously finishing the foam layer spraying and forming of a single pipeline, wherein the advantage is high efficiency, the defect is that the spraying station adopts an inflatable roller or a soft rubber roller with certain hardness, the strength and the curing degree of the foam layer formed after spraying are low, the contact surface with the roller is linear in the initial stage, even if deformation occurs, the contact position coating is strongly pressed due to the hardness and the lower contact area of the contact roller, when the unit weight of the steel pipe is too large or the thickness of the foam layer is too thick, the foam layer can be damaged under the extrusion of the roller, and therefore, the method can only be applied to pipelines with light unit load or pipelines with the diameter of.
Disclosure of Invention
The invention aims to provide a spraying and winding forming production line and a production process for a pipeline anticorrosion heat insulation layer, which can meet the technical requirements of forming large-caliber heavy-load steel pipes or super-thick foam layers and can also meet the requirements of forming medium and small-caliber pipelines by spraying foam layers.
In order to realize the purpose, the invention adopts the technical scheme that: the spraying and winding forming production line for the pipeline anti-corrosion heat insulation layer comprises a polyurethane spraying machine, a foam pipe curing area, a polyethylene protective layer winding production line, an interrupted foam layer spraying production line and a continuous foam layer spraying production line, wherein the interrupted foam layer spraying production line comprises a spraying trolley and a first lifting pipe conveying trolley, a rotary supporting device is arranged on the spraying trolley and used for supporting a pipeline and driving the pipeline to rotate on a supporting surface, and the spraying trolley is positioned on a trolley running track; the first lifting pipe conveying trolley is used for conveying the pipeline which is sprayed on the spraying trolley into the foam pipe curing area; the continuous foam layer spraying production line comprises a first conveying roller way, a second conveying roller way and a second lifting pipe conveying trolley, wherein the first conveying roller way is used for driving a pipeline to be spirally conveyed forwards to the polyurethane spraying machine, the second conveying roller way is used for driving a sprayed pipeline to be spirally conveyed forwards to the second lifting pipe conveying trolley, and the second lifting pipe conveying trolley is used for conveying the sprayed pipeline into the foam pipe curing area.
In the scheme, the polyurethane spraying machine is arranged on the rotating track of the spraying machine, the polyurethane spraying machine can adjust the position of the rotating track of the spraying machine, and the discontinuous foam layer spraying production line and the continuous foam layer spraying production line are positioned on two sides of the polyurethane spraying machine.
In the above scheme, foam tube curing district is provided with the third lift fortune pipe car, polyethylene protective layer winding production line includes polyethylene winding transmission roll table, polyethylene extruder and rubber rolls the roller, the third lift fortune pipe car is used for conveying the pipeline conveying of taking the heat preservation after the curing to on the polyethylene winding transmission roll table, polyethylene winding transmission roll table drives the pipeline of taking the heat preservation forward spiral transmission extremely polyethylene extruder, the rubber rolls the roller and is used for rolling winding fashioned polyethylene layer.
The invention also provides a spraying and winding forming production process of the pipeline anticorrosion heat insulation layer, when a small-diameter pipeline is produced, a foam continuous spraying production line and a polyethylene winding production line are adopted, firstly, a first conveying roller way and a second conveying roller way on the foam continuous spraying production line and a polyethylene winding conveying roller way on the polyethylene winding production line are adjusted, so that the deflection angle and the opening degree of the polyethylene winding conveying roller ways meet the requirement of conveying the small-diameter pipeline, a polyurethane spraying machine is adjusted to a spraying station of the foam continuous spraying production line, the rotating and advancing speeds of the first conveying roller way and the second conveying roller way are calculated, so that the first conveying roller way and the second conveying roller way are adaptive to the discharge amount of the polyurethane spraying machine, and the transmission speed of the polyethylene winding conveying roller ways is calculated, so that the polyethylene winding speed is adaptive to the winding speed of a polyethylene belt extruded; when spraying is started, the pipeline is spirally conveyed forwards to a spraying station of a foam continuous spraying production line through a first conveying roller way, a polyurethane spraying machine starts to spray foam, the pipeline with the foam layer is conveyed to a second lifting pipe conveying trolley through a second conveying roller way, the second lifting pipe conveying trolley conveys the pipeline to a foam pipe curing area, the cured pipeline with the foam layer is conveyed to a polyethylene winding conveying roller way through a third lifting pipe conveying trolley, the polyethylene winding conveying roller way conveys the cured pipeline with the foam layer forwards to a polyethylene winding production line in a spiral mode, and polyethylene winding forming is carried out to form an insulating layer; the method comprises the following steps of producing a large-diameter pipeline, adjusting the deflection angle and the opening degree of a rotary supporting device on a spraying trolley on the foam intermittent spraying production line and a polyethylene winding transmission roller way on the winding production line by adopting a foam intermittent spraying production line and a polyethylene winding production line, enabling the rotary supporting device and the polyethylene winding transmission roller way to be suitable for the requirement of conveying the large-diameter pipeline, calculating the advancing speed of the spraying trolley and the rotating speed of the rotary supporting device, enabling the advancing speed and the rotating speed of the rotary supporting device to be suitable for the discharge amount of a polyurethane spraying machine, and calculating the transmission speed of the polyethylene winding transmission roller way, enabling the polyethylene winding speed to be suitable for the winding speed; when spraying is started, a pipeline is installed on a rotary supporting device on a spraying trolley, the pipeline rotates on the rotary supporting device and is conveyed to a spraying station of a foam intermittent spraying production line through the spraying trolley, a polyurethane spraying machine starts foam spraying, the pipeline with a foam layer is conveyed to a first lifting pipe conveying trolley through the spraying trolley, the first lifting pipe conveying trolley conveys the pipeline with the foam layer to a foam pipe curing area, the cured pipeline with the foam layer is conveyed to a polyethylene winding conveying roller way through a third lifting pipe conveying trolley, the polyethylene winding conveying roller way conveys the cured pipeline with the foam layer forwards and spirally to a polyethylene winding production line for polyethylene winding forming, and the wound pipeline is cooled, shaped, cut and trimmed to form a finished product heat preservation pipe.
In the scheme, the polyurethane spraying machine is arranged on the rotating track of the spraying machine, the polyurethane spraying machine can adjust the position of the rotating track of the spraying machine, and the discontinuous foam layer spraying production line and the continuous foam layer spraying production line are positioned on two sides of the polyurethane spraying machine.
In the scheme, the small-diameter pipeline is a pipeline with the diameter less than or equal to 820 mm; the large diameter pipeline is a pipeline with the diameter larger than phi 820 mm.
In the above scheme, the rotary supporting device is a bearing wheel or an inner clamping fixture.
The invention has the beneficial effects that: 1. the invention is a combination of discontinuous foam spraying and continuous foam spraying processes, and can meet the requirements of forming heat-insulating layers of medium-large-diameter steel pipes, heavy-load steel pipes and ultra-thick foam layers in the existing market. 2. The floor area of the whole production line is reduced by half compared with the floor area of two production lines of an intermittent method and a continuous method, the equipment investment is reduced by 95 percent, and the invention has the advantages of two production lines in the production process. 3. And a set of polyurethane spraying device is adopted, and two processes are compatible through switching, so that the utilization rate of equipment is high.
Drawings
Fig. 1 is a schematic structural diagram of a production line provided by the present invention.
In the figure: 1. a second lifting pipe conveying trolley; 2. a foam layer pipeline I; 3. a second foam layer pipeline; 4. a first lifting pipe conveying trolley; 5, rotating the track of the spraying machine; 6. a polyurethane spray coater; 7. a first steel pipe; 8. a second steel pipe; 9. spraying a trolley; 10, running tracks of the trolley; 11-1, a first conveying roller way; 11-2. a second conveying roller way; 12. a foam tube curing zone; 13, winding and conveying the polyethylene on a roller way; a foam layer pipe; 15, a third lifting pipe transporting vehicle; 16. a polyethylene extruder; a polyethylene tape; 18. a rubber rolling roller; 19. a water cooling system; and 20, insulating layer finished product pipelines.
Detailed Description
The composite process consists of three production lines, namely a foam discontinuous spraying production line, a foam continuous spraying production line and a polyethylene winding production line. The technical solution of the present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, the process route is as follows: producing a pipeline insulating layer with a thickness of more than 820mm, adjusting the working surface of a spray gun of a polyurethane spraying machine 6 to face a foam continuous spraying production line (marked with A in figure 1) along a spraying machine rotating track 5, adjusting a supporting wheel or a fixture of a spraying trolley 9 to be suitable for a first steel pipe 7, after the first steel pipe 7 after rust removal is placed on the spraying trolley 9, driving the first steel pipe 7 to rotate according to the calculated rotating speed by the supporting rotation on the spraying trolley 9, passing through a foam layer spraying area along a trolley running track 10 at a determined advancing speed, starting the polyurethane spraying machine 6 to perform foam layer spraying forming, transmitting a foam layer pipeline 2 after foam layer forming to a lower pipe station, transmitting the foam layer pipeline to a foam curing area 12 by a first lifting pipe conveying trolley 4, transmitting a cured foam layer pipeline 14 to a polyethylene winding and transmitting roller table 13 with an adjusted deflection angle and opening degree (marked with C in figure 1) by a third lifting pipe conveying trolley 15, the foam layer pipeline 14 is spirally conveyed forwards to a polyethylene belt 17 extrusion winding station, a hot polyethylene belt 17 extruded by a polyethylene extruder 16 is wound on the surface of the foam layer pipeline 14, is cooled by a rolling and water cooling system 19 of a rubber rolling roller 18, and is cut off and trimmed to form an insulating layer finished pipe 20.
The second process route is as follows: producing a pipeline insulating layer with a thickness less than or equal to 820mm, adjusting the working face of a spray gun of a polyurethane spraying machine 6 towards a foam intermittent spraying production line (marked B in figure 1) along a rotating track 5 of the spraying machine, adjusting the deflection angle and the opening degree of a first conveying roller way 11-1 and a second conveying roller way 11-2 to respectively meet the requirements of the pipe diameters of a steel pipe II 8 and a foam layer pipeline 3, starting the first conveying roller way 11-1 in which the steel pipe II 8 after rust removal is placed, driving the steel pipe II 8 to screw forwards to pass through a foam spraying area according to a certain speed, starting the polyurethane spraying machine 6 to spray and form a foam layer, conveying the foam layer pipeline II 3 after spraying to a lower pipe station through the second conveying roller way 11-2, conveying the foam layer pipeline II to a foam curing area 12 through a second lifting pipe conveying trolley 1, and conveying the cured foam layer pipeline 14 to a polyethylene winding conveying roller way 13 with the deflection angle and the opening degree adjusted through a third lifting pipe conveying trolley 15 (marked C in figure And the hot polyethylene belt 17 extruded by the polyethylene extruder 16 is wound on the surface of the foam layer pipeline 14, is cooled by a rolling and water cooling system 19 of a rubber rolling roller 18, and is cut off and trimmed to form an insulating layer finished pipe 20.
The specific embodiment is as follows: firstly, steel pipes with the pipe diameter of 820mm are discontinuously sprayed (the adaptive pipe diameter scope phi is less than or equal to 820 mm), the steel pipes are sent into a first conveying roller way upper pipe area with the adjustment angle of 5 degrees after rust removal, the first conveying roller way drives the steel pipes to spirally pass through a foam spraying area at the speed of 0.5m/min, the rotating speed of the steel pipes is 80 r/min, polyurethane double-component materials with the heat preservation temperature of 25 ℃ are sprayed onto the surface of the steel pipes through a polyurethane spraying machine at the horizontal sector of 30 degrees, 4 layers of spraying materials are laminated to form a foam layer with the thickness of 40mm, the sprayed steel pipes are sent to a lower pipe area through a second conveying roller way within 10min, a foam layer pipeline is sent to a coating curing area through a second lifting pipe conveying trolley, the follow-up pipelines are connected end to continuously pass through the foam spraying area in the foam spraying process, the pipeline of the curing area stands for 30min is sent to a polyethylene winding conveying roller way with the adjustment, pass through the polyethylene winding district with 0.5m/min speed spiral, the hot polyethylene area of width 600mm thickness 1mm that extrudes through the extruding machine twines the overlap joint on the foam layer surface with pitch 150mm, rolls through the rubber roller and levels and water-cooling formation thickness 4 mm's polyethylene protective layer, and the pipeline heat preservation that first looks meets cuts apart and transmits to the lower tube district, by the lift fortune pipe dolly low tube after, carries out the tip and repaiies the back and become finished product pipe. Secondly, continuous spraying (the pipe diameter range is more than 820mm and less than or equal to 1620mm, or a heavy-duty pipe with the meter weight of 1 ton and the thickness of a foam layer is more than or equal to 80 mm), derusting the steel pipe with the pipe diameter of 1620mm, then sending the steel pipe into a spraying trolley, aligning the steel pipe in the middle, carrying the steel pipe by an outer supporting wheel or an inner clamping device of the spraying trolley at the head end of the steel pipe, driving the steel pipe to rotate at the speed of 50 r/min by a carrying wheel or an inner clamping device of an outer power transmission force, enabling the spraying trolley to pass through a foam spraying station along a trolley running track at the speed of 0.2m/min, spraying polyurethane double-component materials with the heat preservation of 25 ℃ onto the surface of the pipe by a polyurethane spraying machine at the horizontal sector of 30 degrees, overlapping 8 layers to form a foam layer with the thickness of 100mm, sending the sprayed pipe to a lower pipe area by the spraying trolley within 5min, stopping the advance of the spraying trolley, disengaging the supporting wheel or the, the spraying trolley returns to an upper pipe area at a speed of 10m/min to spray the upper pipe of the next pipeline and foam of the next pipeline, a pipeline which is kept still for 45min in a curing area is sent to an upper pipe area of a polyethylene winding transmission roller way with an adjustable deflection angle of 1 degree by a third lifting pipe transporting trolley, the pipeline passes through the polyethylene winding area at a speed of 0.2m/min in a spiral mode, a hot polyethylene belt which is extruded by an extruding machine and has the width of 600mm and the thickness of 1.6mm is wound and lapped on the surface of a foam layer at a thread pitch of 120mm, a polyethylene protective layer with the thickness of 8mm is formed by rolling and flattening the hot polyethylene belt through a rubber rolling roller and water cooling, a pipeline heat-insulating layer which is connected with the head is divided and transmitted to the lower pipe area.
The composite process production line of the embodiment can only apply one process to produce one pipe diameter at a time, and the polyurethane foam airless sprayer can switch positions according to two different processes.
Claims (7)
1. The production line for spraying and winding the insulating layer of the anti-corrosion heat-insulating layer of the pipeline comprises a polyurethane spraying machine (6), a foam pipe curing area (12) and a polyethylene protective layer winding production line, and is characterized by further comprising an interrupted foam layer spraying production line and a continuous foam layer spraying production line, wherein the interrupted foam layer spraying production line comprises a spraying trolley (9) and a first lifting pipe conveying trolley (4), a rotary supporting device is arranged on the spraying trolley (9) and used for supporting the pipeline and driving the pipeline to rotate on a supporting surface in a self-rotating manner, and the spraying trolley (9) is positioned on a trolley running track (10); the first lifting pipe conveying trolley (4) is used for conveying the sprayed pipeline on the spraying trolley (9) into the foam pipe curing area (12); the continuous foam layer spraying production line comprises a first conveying roller way (11-1), a second conveying roller way (11-2) and a second lifting pipe conveying trolley (1), wherein the first conveying roller way (11-1) is used for driving a pipeline to be spirally conveyed forwards to the polyurethane spraying machine (6), the second conveying roller way (11-2) is used for driving a sprayed pipeline to be spirally conveyed forwards to the second lifting pipe conveying trolley (1), and the second lifting pipe conveying trolley (1) is used for conveying the sprayed pipeline into the foam pipe curing area (12).
2. The production line for spraying, winding and molding the pipeline anti-corrosion heat-insulating layer and the heat-insulating layer as well as the insulation layer as claimed in claim 1 is characterized in that the polyurethane spraying machine (6) is installed on a spraying machine rotating track (5), the polyurethane spraying machine (6) can be adjusted in position on the spraying machine rotating track (5), and the discontinuous foam layer spraying production line and the continuous foam layer spraying production line are located on two sides of the polyurethane spraying machine (6).
3. The spraying and winding production line of the pipeline anticorrosion and heat-insulating layer and the heat-insulating layer as claimed in claim 1, wherein a third lifting pipe transporting vehicle (15) is arranged in the foam pipe curing area (12), the polyethylene protection layer winding production line comprises a polyethylene winding and conveying roller way (13), a polyethylene extruder (16) and a rubber rolling roller (18), the third lifting pipe transporting vehicle (15) is used for conveying cured pipelines with heat-insulating layers to the polyethylene winding and conveying roller way (13), the polyethylene winding and conveying roller way (13) drives the pipelines with the heat-insulating layers to be spirally conveyed to the polyethylene extruder (16) forwards, and the rubber rolling roller (18) is used for rolling the wound and formed polyethylene layers.
4. The spraying and winding process for producing insulating layer of anticorrosive heat insulating layer of pipeline features that during producing small diameter pipeline, adopting a foam continuous spraying production line and a polyethylene winding production line, firstly adjusting a first conveying roller way (11-1) and a second conveying roller way (11-2) on the foam continuous spraying production line and a polyethylene winding conveying roller way (13) on the polyethylene winding production line to enable the deflection angle and the opening degree to meet the requirement of conveying a small-diameter pipeline, adjusting a polyurethane spraying machine (6) to a spraying station of the foam continuous spraying production line, calculating the rotating and advancing speeds of the first conveying roller way (11-1) and the second conveying roller way (11-2) to be adaptive to the discharge amount of the polyurethane spraying machine (6), calculating the transmission speed of the polyethylene winding conveying roller way (13) to be adaptive to the winding speed of a polyethylene strip extruded by an extruding machine; when spraying is started, the pipeline is spirally conveyed forwards to a spraying station of a foam continuous spraying production line through a first conveying roller way (11-1), a polyurethane spraying machine (6) starts to spray foam, the pipeline with a foam layer is conveyed to a second lifting pipe conveying trolley (1) through a second conveying roller way (11-2), the second lifting pipe conveying trolley (1) conveys the pipeline to a foam pipe curing area (12), the cured pipeline with the foam layer is conveyed to a polyethylene winding conveying roller way (13) through a third lifting pipe conveying trolley (15), the polyethylene winding conveying roller way (13) spirally conveys the cured pipeline with the foam layer forwards to a polyethylene winding production line, and polyethylene winding molding is carried out to form an insulating layer; producing large-diameter pipelines, adjusting the deflection angle and the opening degree of a rotary supporting device on a spraying trolley (9) on the foam intermittent spraying production line and a polyethylene winding transmission roller way (13) on the winding production line by adopting a foam intermittent spraying production line and a polyethylene winding production line, so that the rotary supporting device and the polyethylene winding transmission roller way are both suitable for the requirement of transmitting the large-diameter pipelines, checking the advancing speed of the spraying trolley (9) and the rotating speed of the rotary supporting device to be suitable for the discharge amount of a polyurethane spraying machine (6), and checking the transmission speed of the polyethylene winding transmission roller way (13) to be suitable for the winding speed of a polyethylene belt extruded by an extruding machine; when spraying begins, a pipeline is installed on a rotary supporting device on a spraying trolley (9), the pipeline rotates on the rotary supporting device and is conveyed to a spraying station of a foam intermittent spraying production line through the spraying trolley (9), a polyurethane spraying machine (6) begins to spray foam, the pipeline with a foam layer is conveyed to a first lifting pipe conveying trolley (4) through the spraying trolley (9), the first lifting pipe conveying trolley (4) conveys the pipeline with the foam layer to a foam pipe curing area (12), the cured pipeline with the foam layer is conveyed to a polyethylene winding conveying roller way (13) through a third lifting pipe conveying trolley (15), the polyethylene winding conveying roller way (13) conveys the cured pipeline with the foam layer forwards in a spiral mode to a polyethylene winding production line to form a heat insulation layer through polyethylene winding forming, and the wound pipeline is cooled, shaped, cut and shaped, And finishing to form the finished product of the heat preservation pipe.
5. The spraying, winding and forming production process of the pipeline anticorrosion heat-insulating layer and the heat-insulating layer as claimed in claim 4, wherein the polyurethane spraying machine (6) is installed on a spraying machine rotating track (5), the polyurethane spraying machine (6) can be adjusted in position on the spraying machine rotating track (5), and the interrupted foam layer spraying production line and the continuous foam layer spraying production line are located on two sides of the polyurethane spraying machine (6).
6. The spraying, winding and forming production process of the pipeline anti-corrosion heat-insulating layer and the heat-insulating layer as claimed in claim 4, wherein the small-diameter pipeline is a pipeline with a diameter of less than or equal to 820 mm; the large diameter pipeline is a pipeline with the diameter larger than phi 820 mm.
7. The spraying, winding and forming production process of the pipeline anti-corrosion heat-insulating layer and the insulating layer according to claim 4, wherein the rotary supporting device is a bearing wheel or an inner clamping fixture.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010489426.3A CN111688095A (en) | 2020-06-02 | 2020-06-02 | Spraying and winding forming production line and production process for pipeline anti-corrosion heat insulation layer heat preservation layer |
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|---|---|---|---|
| CN202010489426.3A CN111688095A (en) | 2020-06-02 | 2020-06-02 | Spraying and winding forming production line and production process for pipeline anti-corrosion heat insulation layer heat preservation layer |
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| CN111688095A true CN111688095A (en) | 2020-09-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112344989A (en) * | 2020-10-15 | 2021-02-09 | 济南万通铸造装备工程有限公司 | Rapid determination method for thermal insulation pipe spraying parameters |
| CN114889178A (en) * | 2022-05-24 | 2022-08-12 | 江苏奥瑞斯智能装备有限公司 | Environment-friendly low-loss spraying winding insulating pipe production line |
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| CN114889178A (en) * | 2022-05-24 | 2022-08-12 | 江苏奥瑞斯智能装备有限公司 | Environment-friendly low-loss spraying winding insulating pipe production line |
| CN114889178B (en) * | 2022-05-24 | 2023-09-08 | 江苏奥瑞斯智能装备有限公司 | Environment-friendly low-loss spraying winding insulating pipe production line |
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Application publication date: 20200922 |