Arched movable supporting device for inner pipe opening of large-diameter steel pipe
A technology of movable support and inner nozzle, which is applied in the direction of pipeline supports, pipes/pipe joints/pipes, mechanical equipment, etc., can solve the problems of not meeting the requirements of rounding, high cost, long construction time, etc., and achieve the effect of rounding Good, high reliability, the effect of reducing the project cost
Pending Publication Date: 2018-03-09
GUANGZHOU WATER SUPPLY ENG
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Problems solved by technology
The fixed support of the stiffening ring needs to be welded on site. The matching is complicated, the construction time is long, the reuse rate of the support material is low, and the support device has direct damage to the pipe body. The corresponding costs are relatively large, and it is currently only applicable to steel pipes with a diameter ≤ 2200mm Round support; the form of point support is flexible and easy to process, but the round support effect on large-diameter steel pipes is poor, and the shape of the steel pipe port after support is often polygonal, which cannot meet the round support requirements
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[0014] In order to make the technical scheme, purpose and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with actual projects. The present invention is only used to explain the present invention by taking actual projects as specific examples, and does not serve as an explanation of the present invention. limited.
[0015] A water diversion project requires a total of 4056.45 meters of steel pipes with a diameter of DN4800mm. The diameter of the inner nozzle of the large-diameter steel pipe is 4800mm, and the thickness of the steel plate used is 20mm. In the natural state, the difference between the two perpendicular diameters is 180mm to 210mm. It is supported at eight points, and the shapes of the steel pipe ports after the support are hexagonal and octagonal respectively, which cannot achieve the effect of supporting a circle. Therefore, a bow-shaped movable support is implemented for this large-dia...
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The invention discloses an arched movable supporting device for an inner pipe opening of a large-diameter steel pipe with the diameter larger than 3600 mm and not larger than 4800 mm. The device is composed of arched connecting components and supporting components. The arched connecting components are an upper arched connecting component and a lower arched connecting component. Each arched connecting component is composed of an arc-shaped steel strip and three pieces of connecting groove steel. The supporting components are three pieces of groove steel. The upper arched connecting component and the lower arched connecting component which are made well are welded to the inner round wall of the steel pipe respectively, and the three supporting components are welded between the two arched connecting components in the left-middle-right form. The steel pipe is rounded through the arched movable supporting device; and after the steel pipe butt joint installation is completed, all the supporting components and the arched connecting component are dismantled and recycled. The arched movable supporting device is good in rounding effect and simple and convenient to implement and saves resources.
Description
technical field [0001] The invention relates to the field of installation of water pipelines, in particular to a bow-shaped movable support device for the inner nozzle of a large-diameter steel pipe. Background technique [0002] As a pipeline form with high strength, easy processing and strong applicability, steel pipe is currently being used more and more in water pipelines, especially in the construction of long-distance water pipelines. For large-diameter steel pipes with a diameter of >3600mm and ≤4800mm, considering the convenience of hoisting and construction, steel plates with a wall thickness of 20mm are generally used for processing. Due to the large diameter and the small wall thickness of the steel plate used, the rigidity of the steel pipe is small. After the steel pipe is manufactured, it is elliptical under the action of gravity. The difference between the two perpendicular diameters is generally more than 180mm, and the roundness error is large, which is s...
Claims
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IPC IPC(8): F16L7/00
CPCF16L7/00
Inventor 徐政何伟清梁遵希游辉华邓军
Owner GUANGZHOU WATER SUPPLY ENG