Spherical expansion joint for dual-metal composite pipes and processing method thereof
A technology of bimetallic and expansion joints, which is applied to expansion compensation devices for pipelines, pipe elements, pipes/pipe joints/fittings, etc., can solve problems such as delamination or peeling, and achieve the effect of eliminating differences in thermal expansion
Active Publication Date: 2012-08-22
天津市德信成环保科技有限公司
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[0007] Aiming at the disadvantage that existing bimetallic composite pipes are prone to delamination or peeling when used under high temperature conditions, the purpose of the present invention is to provide a spherical expansion joint for bimetallic composite pipes and its processing technology
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[0019] refer to figure 1 , the spherical expansion joint for bimetallic composite pipe mainly includes two parts: a spherical structure in the middle and a straight cylinder at both ends. The straight cylinder is composed of a straight cylinder outer layer 1 and a straight cylinder inner layer 4. The spherical structure is composed of a spherical outer layer 2 and a spherical inner layer 6. A crescent-shaped gap 5 is formed between the spherical inner and outer layers of the structure, and the spherical structure is connected to the straight cylinders at both ends through welding seams 3 . Straight cylinder outer layer 1. The spherical inner layer is made of corrosion-resistant metal. The straight cylinder outer layer and the spherical outer layer are metals with high strength under high temperature conditions. The gap 5 formed by the inner and outer layers absorbs, thereby solving the problem of expansion of different metals in the overall metal composite pipe.
[0020] In t...
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The invention discloses a spherical expansion joint for dual-metal composite pipes and a processing method thereof. The spherical expansion joint for the dual-metal composite pipes is characterized in that the spherical expansion joint comprises a spherical structure in the middle and cylinders at two ends, each cylinder consists of an outer layer and an inner layer, the spherical structure consists of an outer spherical layer and an inner spherical layer, and a gap is reserved between the inner spherical layer and the outer spherical layer of the spherical structure. During processing, the cylinders at two ends are processed before the spherical structure in the middle, two ends of the spherical structure are then opened to be matched with the diameters of the cylinders, and then the spherical structure is welded with the cylinders at two ends firmly respectively.
Description
technical field [0001] The invention relates to an expansion joint for a bimetal composite pipe and a processing method thereof. Background technique [0002] Bimetal composite pipe is also called double-layer pipe, which is composed of two different metal pipes, and the pipe layers are tightly combined through various deformation and connection techniques. It utilizes the best properties of the base material and the cladding metal respectively, and the anti-stress corrosion cracking sensitive chloride and acidic environment corrosion-resistant materials are set in the inner layer, and the high-strength steel is set in the outer layer, so that it not only has the required Compared with the overall alloy tube, it can effectively reduce the cost and improve the performance. At present, this technology has been widely used in petroleum, petrochemical enterprises, nuclear industry, medicine, food processing and other fields. [0003] Plastic composite forming technology is a c...
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IPC IPC(8): F16L51/00B23P15/00
CPCF16L51/022F16L51/00
Inventor 王树众唐兴颖徐东海公彦猛肖旻砚
Owner 天津市德信成环保科技有限公司