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Prestressed concrete spun pole mould

Prestressed concrete spun pole mould is used widely in concrete electricity pole plant production . As a imporatant part during the whole production, the manufacturing technology of concrete spun pole steel mould decides on the quality of concrete pole mould and then to concrete spun pole quality .

Prestressed concrete spun pole moulds are processed now with two methods which are wholistic manufacturing and joining type. Wholistic manufacturing of concrete spun pole mould  have more advantages on the mold rigidity and strength, but the manufacturing need a long lathe machine (mold below 12m can be made with overall process), and transport is not convenient. Therefore, the following is about the joint type concrete pole mould .

When make the half concrete pole mold, the cylinder plate generally use δ = 10mm steel plate, because the national standard in the poles in the provisions of the conical poles ratio of 1:75. For this purpose, the cylinder plate after cutting should be formed by cold pressing in a dedicated 1: 75 tapered die. Due to the limited width of the shears, the length of the cold pressed mold is limited by the length of the cold working equipment. Therefore, the length of the pipe wall is designed to be 2m (for a reference) and then Docking. In addition, it is limited by the processing range of the machining equipment and the restriction of the transport vehicle and the road. So the design is generally 4M long limit, the individual must not exceed 5M. In order to ensure that the pole steel mold in the production of poles, that is, to high-speed smooth operation, and can not be deformed, for this purpose in the cylinder board to run the wheel support plate and liner; , The connection flange at the welding section. But the thickness of only 10MM cylinder board, high-speed operation can not guarantee the reliability, must improve the cylinder surface longitudinal and lateral stiffness. The general practice is to weld the outer surface of the cylinder plate to support the longitudinal, transverse ribs of the cylinder plate, and the end plate flange attached to the longitudinal ribs and the cylinder plate. In the reinforced plate welding bolt hanging ear (commonly known as climbing), matched with the first head of the first screw, washers, nuts, pins. This basically formed a steel mold welded structure of the blank pieces. So that the rigidity of steel mold greatly improved, the basic can meet the requirements of products. How do two halves fit together as a whole? According to the provisions of JC / T364-2001 standards. And two reinforcing plates thicker than the cylinder plate are caulked on the cylinder plate at the split mold face of the mold half. One is to increase the horizontal end of the stiffness, the second is to strengthen the board to draw the bumps and groove to. (In the high-speed centrifugal process to play a sealed role) to prevent the cement slurry in the centrifugal force from the slot at the mouth of the body, the body of the mold, Resulting in leakage phenomenon. Reinforced plate and pipe wall is riveting, while the reinforcement plate can also be welded on the pair of bolt lugs, lifting and turning the ring can also be welded on the reinforcement plate.

Concrete Spun Pole steel mold due to transport and technology and other reasons are manufactured with joining type, and are finished with assembly in concrete electricity pole factory. The connecting flange end and concrete pole mold wheel are precisely processed because the connection accuracy directly affects the curvature of the full length of the steel mold and the smoothness of the run, and the runway surface quality is poor and can cause runaway There are scars, to be Seiko repair, repair glitches only allow sanding polished, the scar around the prominent part of the file can be used to file carefully file, file range is not allowed to exceed the prominent area.

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