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Plastic-coating method for large-diameter steel tube

A technology of large-diameter and steel pipes, which is applied in the field of plastic coating of large-diameter steel pipes, can solve the problems of long time consumption and so on.

Inactive Publication Date: 2016-12-21
高密天一机械科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When using this production line to plastic-coat the inside and outside of the steel pipe, the inner and outer coating processes of the steel pipe need to be carried out sequentially, so it takes a long time

Method used

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  • Plastic-coating method for large-diameter steel tube
  • Plastic-coating method for large-diameter steel tube
  • Plastic-coating method for large-diameter steel tube

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] combine figure 1 , figure 2 , Figure 6 as well as Figure 7 As shown, a large-diameter steel pipe plastic coating equipment includes an underframe 10, and the underframe 10 is provided with a steel pipe rotating device 1. The steel pipe rotating device 1 has two groups for supporting the two ends of the steel pipe 9, and each group of steel pipe rotating device 1 includes a support seat 105, which is installed on the chassis 10, and the support seat 105 is rotatably equipped with two side-by-side The rollers 103 are all driving rollers 103, adopting a four-drive mode, which can effectively avoid the slipping phenomenon between the steel pipe 9 and the rollers 103 during the plastic coating process.

[0040] The outer peripheral surface of the roller 103 is provided with anti-slip teeth 109, and a groove for containing plastic powder is provided between adjacent anti-slip teeth 109. When the steel pipe 9 is coated with plastic, the temperature is generally about 280...

Embodiment 2

[0056] to combine Figure 8 and Figure 9 Commonly shown, there are two walking frames 7, and the two walking frames 7 are provided with a powder material trough 40 and a hopper 22. During operation, the two walking frames 7 advance from the two ends of the steel pipe 9 to their respective working positions. After the blanking is completed, the two walking frames 7 return backwards. The large-diameter steel pipe 9 is plastic-coated by using two walking frames 7 in combination, and the steel pipe 9 with a longer length can be plastic-coated.

[0057] In the present invention, the turning hopper 22 is turned over to feed the powder and the powder chute 40 is used to coat the inside and outside of the rotating steel pipe 9 with plastic, which improves the coating speed of the steel pipe 9 and makes the coating of the steel pipe 9 uniform.

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Abstract

The invention discloses a plastic-coating method for a large-diameter steel tube. The preheated steel tube is driven to rotate, and after a material turning hopper and a powder trough reach the working stations, plastic-coating powder is fed to the inner circumferential face and the outer circumferential face of the steel tube correspondingly; after plastic-coating is completed, the material turning hopper and the powder trough retract, and the steel tube is solidified after plastic powder is slicked on the inner circumferential face and the outer circumferential face of the steel tube and form a continuous coating. According to the method, the large-diameter steel tube can be plastic-coated internally and externally, the coating speed is rapid, and the coating of the steel tube is uniform.

Description

technical field [0001] The invention relates to the technical field of plastic-coating technology for steel pipes, in particular to a plastic-coating method for large-diameter steel pipes. Background technique [0002] The inner and outer plastic-coated steel pipes are made by melting a layer of polyethylene (PE) resin, ethylene-acrylic acid copolymer (EAA), epoxy (EP) powder, non-toxic polypropylene (PP) or non-toxic polyvinyl chloride (PVC) on the steel pipe wall. ) and other organic substances, the plastic-coated steel pipe not only has the advantages of high strength, easy connection, water impact resistance, etc., but also overcomes the corrosion, pollution, scaling and low strength of the plastic pipe , poor fire performance and other shortcomings. [0003] Large-diameter steel pipes generally refer to steel pipes with a nozzle diameter of 300mm to 2400mm, which can be coated with plastic coatings with different properties such as polyvinyl chloride (PVC), polyethylen...

Claims

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Application Information

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IPC IPC(8): B05D7/14B05D7/22B05C9/04B05C7/04B05C5/00
Inventor 罗峰何相友邓志昌罗旭成
Owner 高密天一机械科技有限公司
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