An inner support device of a large-wall-thickness high-strength pressure steel pipe

Abstract

The invention discloses a large-wall-thickness high-strength pressure steel pipe inner supporting device which comprises an installing disc, multiple fixed supporting mechanisms and multiple movable supporting mechanisms. Each fixed supporting mechanism comprises a first supporting rod and a first jacking mechanism. Each movable supporting mechanism comprises a second supporting rod and a second jacking mechanism. Each first jacking mechanism comprises an installing frame and a moving frame. Each second jacking mechanism comprises an installing frame and a moving frame. Each installing frame comprises a bottom plate and a first side plate. Each moving frame comprises a top plate and a second side plate. A jacking pillar is fixed to the top of each top plate. Installing cavities are formed between the first side plates and the second side plates. Jacks are arranged in the installing cavities. The outer ends of the first supporting rods are fixedly connected with the bottom plates of the fixed supporting mechanisms. The outer ends of the second supporting rods are fixedly connected with the bottom plates of the movable supporting mechanisms. The inner ends of the first supporting rods are fixedly connected with the installing disc. The inner ends of the second supporting rods are hinged to the installing disc. The supporting device is simple in structure, reasonable in design and easy to operate, plenty of manpower, financial resources and material resources can be saved, the construction progress is accelerated, and the production and manufacture cost is extremely low.

Description

technical field [0001] The invention relates to an inner support device, in particular to an inner support device of a large wall thickness and high strength pressure steel pipe. Background technique [0002] In recent years, penstocks are often used in industries such as chemical industry, building construction, plumbing, petroleum, and hydropower to transport oil, gas, water and other media, and internal support devices need to be installed after the penstocks are manufactured, installed and rounded. Generally, the common internal support device is made of shaped steel or welded pipe into a rice-shaped structure. After the pipe joint is rounded, the screw adjustment and bolt connection are used to adjust the length of the rice-shaped support, and it is pushed against the inner wall of the pressure steel pipe to ensure the roundness of the pressure steel pipe. The role of support. [0003] However, with the introduction of new technologies and new materials, pressure steel...

AI Technical Summary

Problems solved by technology

As the pressure increases, the steel pipe reaches the roundness required by the design and specifications, and the jack can only be removed until the penstock is fabricated and installed, otherwise the roundness requirements of the penstock cannot be guaranteed.

At the same time, since high-strength pressure steel pipes are not allowed to directly weld steel-type internal supports on the pipe wall, screw and bolt-type internal support devices cannot meet the requirements for adjusting the pressure of the dome

[0004] In view of the above situation, the most direct and effective solution is to increase the number of large-tonnage jacks, which will greatly increase the production cost of the internal support device, and will also affect the construction progress, resulting in a series of technical and economic problems

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