Production technology of semicircle groove internal threaded steel pipe

Abstract

The invention discloses a production technology of a semicircle groove internal threaded steel pipe, belongs to the technical field of production of semicircle groove internal threaded steel pipes, and particularly provides an internal threaded steel pipe preset with semicircle grooves. The production technology comprises the following steps of (1) material selecting; (2) abrasive machining; (3) extrusion forming; (4) internal thread machining; (5) milling; and (6) tempering. Machining of the steel pipes is simple, the yield is high, the service life is long, if a screw thread is broken, the problem that continuous fastening is hard due to breaking of the screw thread can be relieved through the semicircle grooves formed oppositely, the technical effect of one pipe for durable using is achieved in real sense, and meanwhile the advantages of increasing the heat transfer area and improving the heat dissipation performance of an existing internal threaded steel pipe are also inherited.

Description

technical field [0001] The invention belongs to the technical field of production of semicircular groove internally threaded steel pipes, and specifically refers to the production process of semicircularly groove internally threaded steel pipes. Background technique [0002] In the fields of refrigeration, air conditioning, process engineering, petrochemical industry, and energy and power engineering, it is necessary to involve the boiling or condensation of liquid on the outer surface of the tube bundle, especially the evaporator and condenser used in refrigeration or air conditioning systems. When the refrigerant boils or condenses outside the tube, the thermal resistance of the phase change heat transfer is equal to or even greater than the thermal resistance of the forced convection heat transfer inside the tube. The heat transfer performance of the condenser can play a significant role. [0003] In the prior art, in order to improve the heat transfer performance of the...

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Problems solved by technology

[0003] In the prior art, in order to improve the heat transfer performance of the tube, internal threads are provided on the inner side of the heat transfer tube, and the heat transfer area of ​​the tube is increased by setting the internal thread, thereby improving the heat dissipation performance of the tube, while the traditional internal thread steel tube often It is a full-through internal threaded steel pipe. This kind of steel pipe is time-consuming and laborious to process and has a very short service life. Once one thread of the internal thread is damaged, the entire steel pipe will lose its use value.

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