Butt welding flange for steel pipe anticorrosive coating protection and construction method

A technology of anti-corrosion coating and welding flange, which is applied in the direction of flange connection, manufacturing tools, welding equipment, etc., can solve the problems of inability to achieve effective protection of plastic coating inside the pipeline, poor heat insulation performance, etc., and achieve the goal of reducing welding heat Transmission, low outer edge height, and the effect of ensuring welding quality

Pending Publication Date: 2020-12-08
刘丽
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In Document 2, there is no heat insulation groove on the inner end face of the flange corresponding to the weld of the neck flange and the wall flange respect

Method used

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  • Butt welding flange for steel pipe anticorrosive coating protection and construction method
  • Butt welding flange for steel pipe anticorrosive coating protection and construction method
  • Butt welding flange for steel pipe anticorrosive coating protection and construction method

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Example Embodiment

[0024] figure 1 , figure 2 , image 3 It shows a butt welding flange for steel pipe anti-corrosion coating protection. The shape of the right flange and the left flange are symmetrical. A rectangular heat sink 1 with an open top; the outer edge of the inner surface of the disk has a V-shaped groove 6 formed by splicing left and right flanges; the middle part of the inner surface of the disk has a rectangular or circular section. , the top opening of the annular apron groove, the rectangular apron 5 or circular apron is embedded in the above-mentioned annular apron groove, or, the annular iron plate seal is welded on the annular apron groove. The annular water circulation groove 2 with a rectangular cross section is located outside the annular rubber ring groove and directly communicates with the annular rubber ring groove, and there is a radial partition 2a on the annular water circulation groove 2, and the water inlet 3 and the outlet hole are respectively located on both ...

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Abstract

The invention provides a butt welding flange for steel pipe anticorrosive coating protection and a construction method. A right flange and a left flange are symmetrical in shape, the structure of theleft flange is that an annular heat dissipation groove is formed in the outer side surface of a disc; a groove is formed in the outer edge of the inner side surface of the disc; an annular rubber ringgroove with a rectangular or circular section and an open top being formed in the middle of the inner side surface of the disc, and a rectangular rubber ring or a circular rubber ring is embedded inthe annular rubber ring groove; and an annular water circulation groove with the rectangular cross section directly communicates with the annular rubber ring groove, a radial partition is arranged onthe annular water circulation groove, and a water inlet hole and a water outlet which are correspondingly in the two sides of the radial partition extend inwards from the outer side surface of the disc in the axial direction until communicate with the annular water circulation groove. Damage of high welding temperature to the anticorrosive coating on the inner wall of the steel pipe is avoided byincreasing the heat dissipation area and circulating cooling water. The butt welding flange for steel pipe anticorrosive coating protection device has the advantages of simple structure, simple and convenient operation, good practical effect and the like.

Description

technical field [0001] The invention relates to a pipe connector, in particular to a water-cooled heat-insulating welded flange for protecting the anticorrosion layer on the inner wall of an anticorrosion steel pipe port and a construction method. Background technique [0002] The Chinese patent literature has the following disclosures: [0003] Document 1: "Special Welded Flange Joint for Anti-corrosion Composite Pipe Connection" (CN201420819598.2): The end faces of the two flanges are each equipped with a heat insulation groove, the heat insulation groove is a curved structure, and a rectangular rubber sealing ring is installed between the flanges. It prolongs the heat conduction path, reduces the heat conduction rate, and solves the damage to the coating and elastic seal due to the welding heat effect. [0004] In Document 1, there is no heat insulation groove on the inner end surface of the flange corresponding to the weld between the flange and the pipe (that is, the w...

Claims

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Application Information

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IPC IPC(8): F16L23/032F16L23/026B23K37/00
CPCB23K37/003F16L23/006F16L23/026F16L23/032
Inventor 刘丽
Owner 刘丽
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