Expansion-type welded tensile joint and its realization process
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A technology of expansion and stretching, applied in lighting and heating equipment, heat exchanger fixing, heat exchange equipment, etc., can solve the problems of high processing cost, waste of large materials, cumbersome processing technology, etc. The effect of reduced material cost and simple process operation
Active Publication Date: 2020-05-19
JIANGSU BAODE HEAT EXCHANGER EQUIP
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[0005] The technical problem to be solved by the present invention is that a large amount of material will be wasted when processing large-diameter welded pipes by using pipes or solid round steel on a numerically controlled lathe for the connecting pipes used in traditional brazed plate heat exchangers. Its processing cost is also particularly high, and the processing technology is relatively cumbersome. Two kinds of relatively simplified and greatly reduced processing costs are proposed.
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[0049] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0050] The present invention proposes an expansion-joint welded tensile joint and its processing technology, and the specific technical scheme adopted is as follows:
[0051] From left to right, they are brazed plate heat exchanger A and connecting pipe B, such as figure 1 shown. The connecting pipe is a stainless steel pipe manufactured by stretching and forming. The connecting pipe is distinguished by the top and the bottom, and the size is as follows figure 2 Shown: the diameter of the inner hole at the top of the connecting pipe is a=54mm, the diameter of the outer circle is b=56mm; the bottom end of the connecting pipe is an annular boss, the diameter of the outer circle is i=51mm, the diameter of the inner hole is h=49mm, and the boss at the bottom The thickness is f=2mm, and the inlet and outlet pipes of the brazed plate heat exchanger are process...
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Abstract
The invention discloses an expanded-connection-type welding stretching connecting pipe and two stretching forming processes thereof. The stretching forming process adopting a stainless steel plate comprises the working procedures that preparation is conducted; the plate is continuously stretched through a stretching die; the two ends of the connecting pipe are milled; forming is conducted througha spinning die; the bottom end of the connecting pipe is flanged through a flanging die; the bottom end of the connecting pipe is milled; a limiting groove is extruded through an extruding die; the expanded connection position is cleaned; expanded connection is conducted; and quality inspection is conducted. The stretching forming process adopting a stainless steel pipe comprises the working procedures that preparation is conducted; the bottom end of the pipe is milled; forming is conducted through the spinning die; the bottom end of the connecting pipe is flanged through the flanging die; thebottom end of the connecting pipe is milled; the limiting groove is extruded through the extruding die; the expanded connection position is cleaned; expanded connection is conducted; and quality inspection is conducted. The expanded-connection-type welding stretching connecting pipe and the two stretching forming processes thereof have the advantages that the processing processes of the connecting pipe are simplified, and the raw material cost and the machining cost are greatly reduced.
Description
technical field [0001] The invention is a connecting pipe processed by a new process, especially relates to a stainless steel joint welded with a copper tube, which is applied to a brazed plate heat exchanger. The main feature is that the processing technology of the connecting pipe is simplified, and the cost of raw materials and machining is greatly reduced . Background technique [0002] Plate heat exchanger is an ideal equipment for liquid-liquid and liquid-vapor heat exchange. It has a series of advantages such as high heat exchange efficiency, small heat loss, compact and light structure, small footprint, and long service life. Widely used in metallurgy, mining, petroleum, chemical industry, electric power, medicine, food, chemical fiber, papermaking, textile, shipbuilding, heating and other departments. Moreover, it can be used in various situations such as heating, cooling, evaporation, condensation, sterilization, and waste heat recovery. There are two main types ...
Claims
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