Production process and production line for continuous stainless steel coil

A stainless steel plate and production process technology, applied in the field of heat exchange equipment, can solve problems such as complex process steps, increased liquid film thermal resistance, and reduced heat exchange efficiency, and achieve the effects of bright and uniform color, easy cold forming, and good ductility

CN101797602BActive Publication Date: 2011-09-14BAC DALIAN
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2011-09-14

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Abstract

The invention relates to the machining for a stainless steel coil of a heat exchanging pipe. A production process for a continuous stainless steel coil comprises a pipe making step, a pipe bending step and a cutting step which adopt continuous on-line machining, wherein the first pipe making step comprises the following step: using a steel band as a raw material to perform on-line continuous pipemaking; the second pipe bending step comprises the following steps: conveying an obtained steel pipe into a pipe bending machine; conveying a bent pipe to a second pipe bending position to bend the bent pipe for a second time; continuously bending the pipe in turn until the steel pipe is bent and assumes a single continuous bent pipe; and the third cutting step comprises the following step: sizing the single continuous bent pipe and cutting pipe end excess materials to obtain a single coil single pipe with a length of between 15 and 133 meters without a radial weld joint. The production process has the advantages of low cost, continuous pipe making and pipe bending and convenient machining, assembling and transportation. The obtained stainless steel coil has few or no radial welding spot,strong corrosion resistance without stress corrosion or corrosive pitting phenomenon, stable mechanical strength and relatively better heat exchanging efficiency.
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Description

technical field

[0001] The invention relates to the field of heat exchange equipment, in particular to the production process of heat exchange stainless steel coils. In addition, the invention also relates to its production line. Background technique

[0002] There are two types of serpentine coils currently used for heat exchange equipment: carbon steel pipes and stainless steel pipes. Carbon steel pipe: the appearance is usually treated by hot-dip galvanizing. However, it will inevitably be oxidized and discolored during long-term use. Corrosion in wet conditions will produce zinc white rust or red rust, which is inferior to stainless steel in terms of aesthetics. Scale resistance: Due to the hot-dip galvanizing process of carbon steel pipes and the continuous corrosion of the zinc layer during use, the surface roughness increases, and impurities, biological bacteria, and dirt in the water are easier to adhere to and deposit, and the induction period for scaling is shorter...

Examples

Embodiment 1

[0023] Such as Figure 4 The continuous stainless steel coiled pipe production line shown includes pipe production equipment and pipe bending production equipment. Frame (guiding device 3), molding machine 5. The aforementioned devices are dynamically connected by stainless steel belts in sequence. The unit 11 and the high-speed flying saw (cutting device 12) are dynamically connected in turn by stainless steel pipes; the stainless steel pipes after pipe making enter the bending pipe production equipment through the transmission equipment 13, and the bending pipe production equipment includes a blanking slide 14, a pipe bending platform 15, The digitally controlled pipe bender 16 and the sizing device 17 are dynamically connected in turn to form a pipe bending production line.

Embodiment 2

[0025] Adopt the production line described in embodiment 1 to produce a kind of continuous stainless steel coil pipe, concrete production process comprises pipe making, pipe bending and three steps of cutting (such as figure 1 ), pipe making, pipe bending and cutting adopt continuous online processing, of which

[0026] The first step of tube making: such as figure 2 As shown in the figure, the online continuous pipe making with steel strip as raw material, the pipe production line unit directly extracts the continuous raw material steel strip from the looper for pipe making. Specifically: Uncoiling feeds the looper (feeding speed is usually much higher than the output speed, the maximum can reach 240m / min). Formed by W forming pre-bending machine, after forming, carry out axial welding on-line, and on-line cooling (water-cooled steel pipe reduces the temperature of the pipe body to facilitate polishing and grinding), and on-line grinding and deburring of the welded part of ...