Large-pipe diameter electric preheating compensation control method

A technology of compensation control and electric preheating, which is applied in the direction of electric heating devices, ohmic resistance heating parts, electrical components, etc., can solve problems such as inability to achieve precise control, and achieve the effects of preventing heat loss, prolonging service life, and avoiding damage

Inactive Publication Date: 2020-07-24
济南能源工程集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a large-diameter electric preheating compensation control method to solve the technical problem that the elongation of the steel pipe can not be accurately controlled by manually observing the elongation of the steel pipe with a ruler on site

Method used

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  • Large-pipe diameter electric preheating compensation control method

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Embodiment Construction

[0039] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orie...

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Abstract

The invention discloses a large-pipe diameter electric preheating compensation control method. The method comprises the following steps: excavating a groove, and putting a pipeline into the groove; backfilling the groove provided with the preheated section pipeline with sand, specifically, the backfilling sand is a certain distance away from the two ends of the preheated section pipeline; sealingthe two ends of the preheated section pipeline; connecting the two ends of the preheated section pipeline with cables, and connecting the cables with power supply equipment to form a closed loop; arranging a length detection device at the end close to the preheated section pipeline; arranging a temperature sensor at one end of the preheated section pipeline; and recording the initial temperature displayed by the temperature sensor and the initial position of an elongation detection device before the preheated section pipeline is electrified. The method has the beneficial technical effects thataccurate elongation comparison and temperature check can be realized, accurate control is realized, labor and time are saved, safety and reliability are realized, and cost is saved.

Description

technical field [0001] The invention relates to the technical field of thermal pipelines, in particular to a large-diameter electric preheating compensation control method. Background technique [0002] Electric preheating pipeline installation technology refers to electrifying a certain length of pipeline preheating section in the trench. Since the pipeline is a steel pipe with a certain resistance, it will heat up and expand and elongate after the current is applied, so that the pipeline will generate a certain tensile stress. When the pipeline is preheated to the required temperature and the elongation of the pipeline meets the requirements, the backfilling of the trench is completed. [0003] At present, the elongation of the steel pipe is usually observed manually on site using a ruler, which cannot be accurately controlled. Contents of the invention [0004] The purpose of the present invention is to provide a large-diameter electric preheating compensation control ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16L1/028F16L1/06H05B1/02H05B3/06
CPCF16L1/028F16L1/06H05B1/02H05B3/06
Inventor 闻青山张斌
Owner 济南能源工程集团有限公司
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