Wind Power Generator Steel Tower

Wind Power Generator Steel Tower 

Company introduction: 
  Hangzhou Debao Electromechanical Manufacturing Co,. Ltd was founded in 2003. It's a professional manufacturer in communication tower, electrical tower, galvanizing process and decorative antenna and so on. With 163.8 million RMB registered capital and 700 employees, Debao has become the largest hot-dip galvanizing production base around East China( total 780 tons production capacity). Also, it is the manufacturing base of Zhejiang University Chemistry Laboratory galvanizing products and enterprise credit AAA company with ISO certificate. 
  We have 10000 square meter office building and 46000 square meter workshop equipped with high-level production lines for communication tower and hot-dip galvanizing, which constitute a strong guarantee for the company's high operation efficiency. Per market demand, Debao launched a series of landscaped tower, bionic tower, decorative antenna, portable mobile base station, which have been widely used by operators now.

Qualification:
Business license, tax registration certificate and organization code certificate, quality management system, occupational health management system, environmental management system, enterprise credit AAA. 

Construction Process:
1.Raw material inspection 
Check steel specification, grade and heat number when coming, and then send sample to the laboratory for testing. Welding material needs re-rest of welding; Purchased tower attachments also need retest. Any non-conforming material should be avoided to enter into the production line.

2.Mark sample number
After sample plate and rod made, all the samples need to be approved by customers, then reviewed and marked number. Marked number with digital control, steel tower needs to retain head margin when cutting according to process requirement, diameter of both tube ends need the conformance with matching welding tube. The deviation is not more than ± 1.5D/1000, the total height deviation is no more than H/1500.

3.Rolling tube
After marked number and qualified, then turn to roll tube. To keep the ellipticity of the sheet plate, rolling on rolling machine where roller can move horizontally, then weld the connecting line and recheck. Visual inspection after rolling, the roundness should not exceed 3mm.

4.Welding
After Tube Bending, inspection and approval, it goes to automatic welding. Before welding, bevel angle is 25 degrees, also welding edge needs removing rust, burrs and dirt, electrode must be dried, coating drops or rust core are not allowed, and damp solder is also not allowed. Clean each welding line and inspect, then re-weld after clear defects. After welding slag and spatter need to be cleaned up. Select T-joints and 20% nearby welding line on main tower UT test to achieve GB11345-1989BII.

5.Flange installation
The flange needs automatic welding and UT test qualified. After installation and appearance inspection, inspect the angle dimension, so as to make sure the tower get installed smoothly.

6.Test assembly
Each section of the tower needs assembly test. The technical department will make a complete inspection, including the welding line mechanical property, the tower dimensions (length deviation, connection flatness and straightness, tower tube ovality, tube diameter deviation) must comply with requirement before turning to next stage.

7.Galvanizing 
After tower assembly test galvanizing will apply. Hot dip galvanizing coating thickness needs 86um  
8.Inspection after galvanizing 
Test assembly again after galvanizing qualified, and the requirements are the same with previous test assembly. If there is deviation it needs correction, then turn to next stage.

9.Painting
Grinding zinc coating by sand blasting or abrasive paper to make the surface flatness and smoothness but not to damage zinc coating, then spay 6 layers painting to make sure the tower's service life.

Details

Steel Type	steel pole and angle steel
Material	Q235,Q345 (A36, A572 Gr.50)  or others
Height	10-100m
Voltage	0KV-500KV
Appearance	Hot Dip Galvanized
Shape	Round face/Polygonal face
Connection type	Overlap/Flange connection
Quality system	SO 9001-2008;ISO 14001-2004
Standard	GB/T2694-2010or GB/T646-2006 or international
Lifetime	50 years

Pump Liner is a part of Dredge Pump

dredge pumps ranging from inlet diameters of 400mm up to 1400mm. Our CFD optimized pumps have an excellent suction performance, high efficiency, long wear life and require a minimum of maintenance. The pumps can be delivered in different types of wear resistant materials, and can be executed in a large number of different configurations. 

Photo of our Pump Liner:

Single-Walled Dredge Pumps
single-walled dredge pumps are `all-round` and used in all types of dredgers. They are designed for typical pump pressures up to 16 bars, and can be excecuted with different types of pump seals such as: stuffing box, mechnical seal or hydro seal.

Double-Walled Dredge Pumps
double-walled dredge pumps are specially designed for high pressures, starting typically from 16 up to 30 bars. The double-walled pump design is based on the concept of pressure compensation between the outer-,  and inner-pump casing. All types of configurations are possible such as 3,4 and 5 vane impellers, and casted or welded outer-casings.

Underwater Dredge Pumps
The underwater dredge pumps are used in cases where the highest possible suction performance is required. They basically have the same possibilities and options as our single-walled pumps have. Depending on our clients' preference they are executed with direct motor drive or integrated gearbox, with or without pressure compensation.

Casting
1)Pattern
Collection in our storehouse. Inspection of pattern in our workshop. 
Pieces cast with wrong pattern due to insufficient inspection of pattern are rejected.
Free delivery of pattern (in good condition) with last cast piece of order to our client or stored in our workshop for future new production but with time-limited or quantity-bound.

2)Cast pieces
Material
The use of the cast pieces requires other chemical analysis and mechanical properties (unless otherwise mentioned on drawing). 
Cast pieces group S (Wear) : 
Impellers, pumphousings, dredge lines (bends, branchpipes, etc.)
Cast pieces group C (Construction) :
Other pieces as pivots, rod eyes, wire sheaves etc.
3)cast seel
GS32NiCrMo14.4.2
Chemical:
C:0.30-0.36%         Si:0.60%MAX
Mn:0.60-1.00%       Cr:1.00-1.70%
 Ni:3.00-4.00%         Mo:0.30-0.60% S:0.025%MAX         P:0.03%MAX 
V:0.05%MAX          Cu:0.30%MAX  
Mechanical:
Rm:min1100MPa;Rp0.2:≥850
A:≥8%;KV≥15J(20℃)
4)cast iron

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