Large Diameter PU Spray Foaming PE Wrapped Preinsulation Pipe Continuous Production Line
Brand Name:HUASHIDA
Certification:CE, ISO9001:2008
Model Number:50-1600MM
Minimum Order Quantity:1
Delivery Time:60DAYS
Payment Terms:L/C,D/P,T/T,Western Union
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Location:
Qingdao Shandong China
Address:
69 Jinsheng Second Road Chengyang District, Qingdao, Shandong, China
Supplier`s last login times:
within 23 hours
Product Details
Company Profile
Product Details
Large diameter PU Spray Foaming PE Wrapped Preinsulation Pipe Continuous Production Line
Pipe diameter range: 500-1600MM
1. Pipe structure
Our company independently developed the spray winding insulation
pipe production line, which consists of three parts: shot blasting
and rust removal production line, polyurethane spraying production
line, and PE winding production line.
2. Production line parameters:
(1) Steel pipe coverage: 206mm-1820mm
(2) Processing capacity: ≤250m2/h
(3) Cleaning level: Sa2.5
(4) Materials used: Black material (isocyanate), white material
(combined polyether), polyethylene
(5) Main equipment: Shot blasting and rust removal production line,
polyurethane spraying production line, PE winding production line,
consisting of three parts
3. Technological flow:
(1). Steel pipe rust removal: use a hydraulic lifter to transport the steel pipe to conveying line. The steel pipe rotates and enters the shot blasting chamber. When the internal sensor collects the signal of incoming steel pipe, the shot blasting machine starts to work. The shooting projectiles hits the outer surface of the steel pipe, removing rust and impurities attached to pipe surface, and the steel pipe moves onto the conveying line. After shot blasting treatment, the outer surface of the steel pipe
meets the requirements of SA2.5.
(2). Polyurethane spraying: The steel pipe moves forward at a constant speed on rotating wheels. The spraying robot blow foaming materials to form umbrella shaped fog to evenly spray it onto surface of the rotating steel pipe. The polyurethane raw materials foam within a short period of time to achieve the required compressive strength and
design thickness. When the insulation layer is very thick, multiple times of spraying can be required.
(3). Polyethylene pipe winding: The steel pipe that has been coated with polyurethane insulation layer rotates and moves along the conveying line. The extruder extrudes a certain thickness of molten
polyethylene sheet and winds it on outer surface of the insulation
layer. As the insulated steel pipe continues to move forward, the extruder continuously extrudes the molten polyethylene
sheet material and wraps it on the surface of the polyurethane
layer to form protective layer.
(4). Spray cooling: The semi-finished pipe wrapped with a polyethylene
outer protective layer is cooled by an online spraying device. The polyethylene outer protective layer tightly wraps the
polyurethane insulation layer on the steel pipe, completing the production of insulated steel pipe.
(5). Tracking and cutting: online track the pipe and cut automatically. When the sensor detects incoming pipe, the control system automatically starts the cutting saw.
While the saw blade rotates at high speed, the cutting mechanism
performs circumferential cutting around the pipe. Online cutting not only ensures high quality cutting ends, but also ensures the continuity of production and improves
production efficiency.
(6). Number the finished pipe and put pipes into warehouse
PU Foaming spary Preinsulation Pipe Continuous Production Line
4. Main line Composition of the polyurethane coating steel preinsulated pipe equipment:
| No. | name |
| 1 | External wall Shot blasting rust removel machine |
| 2 | Medium-frequency induction heating furnace |
| 3 | Polyurethane spray foaming unit |
| 4 | pipe rotator trolley |
| 5 | Single screw extruder and diehead mould |
| 6 | Finished pipe ends trimming machine |
| 7 | pipe Conveyers and racks |
| 8 | Electrical system and PLC |
5.Features of the polyurethane spraying PE winding insulation pipe
(1). Density, thermal conductivity, compressive strength and other
indices of the polyurethane insulation layer are uniform and
consistent.
(2). The polyurethane insulation layer is formed by free foaming.
Since polyurethane is foamed perpendicular to the axial direction
of the pipe, compressive strength of the insulation layer is
improved.
(3). The polyurethane insulation layer is formed after spraying.
The raw materials are sprayed onto the outer surface of the steel
pipe in a liquid form, and then begins to foam. Due to the high
reaction activity of the spraying polyurethane raw materials,
adhesion between steel pipe surface and polyurethane foam layer is
stronger.
(4).Roughness of the surface of polyurethane foam layer is more
conducive to increase bonding effect between insulation layer and
outer HDPE protective layer.
(5). Polyurethane insulation layer can be sprayed according to the
thickness required by customers with a thickness of 15-20mm. Costs
can be significantly saved.
(6). Prefabricated directly buried insulation pipes produced using
the "spray winding" process, with polyurethane insulation layer and
polyethylene outer protective layer thickness adjustable according
to users needs. The production process does not require additional
molds and tooling, making it simple and easy to operate. Due to the
absence of expansion stress on the polyethylene outer protective
layer during foaming in the "spray winding" process, thickness of
the polyethylene outer protective layer can be relatively thinner,
reducing costs for customers.
(7). The polyethylene outer protective layer is formed by
circumferential winding, therefore circumferential elongation and
tensile strength are significantly improved. Circumferential
strength of polyethylene protective layer is stronger.
(8). As this is a completely automatic production line, Production
speed is improved and production quality is consistent and
superior.
Rust Removal
PE film jacket wrapping
PE Jacket Water quenching
Qingdao Huashida Machinery Co., Ltd was established in 2003. Since
its inception, Huashida has focused on plastic polyurethane
insulation pipe production line, 3LPE anticorrosion pipe production
line, large diameter underground pipe production line and plastic
pipe joints for 20 years. We always attach great importance to
research and development,collaborating closely with Beijing
University of chemical technology, Qingdao university of technology
and scientific research institutions. by absorbing advanced
technology home and abroad, after 22 years of endeavor we now rank
one of the top 3 manufacturers in the industry in China. Huashida
machines have been well received in Saudi Arabia, Kazakhstan,
Uzbekistan, United Arab Emirates, Turkey, Russia, etc.
Large Diameter PU Spray Foaming PE Wrapped Preinsulation Pipe Continuous Production Line
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