Device for enhancing shell strength during heat exchanger tube head pressure withstanding test and pressure testing method

Abstract

The invention belongs to the technical field of heat exchange devices in petrochemical engineering, and particularly relates to a device for enhancing shell strength during heat exchanger tube head pressure withstanding test and a pressure testing method. The device for enhancing shell strength during heat exchanger tube head pressure withstanding test is used for the pressure testing process of afixed tube sheet heat exchanger and is arranged on the shell of the heat exchanger, a plurality of flexible cables used for enhancing strength are wound on the shell of the heat exchanger, a dead zone reinforcing ring is arranged in the winding dead zone of a connecting part of the shell of the heat exchanger and a connecting pipe, and a pipe connecting flange component is arranged on a connecting pipe flange. According to the invention, the strength of the shell is effectively enhanced by utilizing the characteristics that the flexible cable is soft and liable to deform and capable of bearing tensile stress, and the device is low in cost, wide in application scope and strong in practicability.

Description

technical field [0001] The invention belongs to the technical field of heat exchange devices, and in particular relates to a device and a pressure test method for enhancing the shell strength of a heat exchanger tube head during a pressure test. Background technique [0002] The fixed tube-sheet heat exchanger has the characteristics of relatively simple and compact structure, less machined parts and low cost, and is widely used in petroleum refining and chemical production. Under the condition that the tube side pressure (Pt) is higher than the shell side pressure (Ps) and the difference between the two is large, the shell side pressure test pressure cannot be increased to test the tube head due to the thin shell thickness . At present, design and manufacturing units generally use the method of supplementary ammonia leak detection to detect the pipe head, but this method is not only dangerous and costly, but also can only detect the tightness of the pipe head, but cannot d...

AI Technical Summary

Problems solved by technology

At present, the method of supplementing ammonia leak detection is usually used to detect the pipe head. The problem is that ammonia and air are easy to form an explosive mixture and cause an explosion, and the leakage of ammonia gas will cause environmental pollution and cause personnel poisoning. The leak detection method can only detect the tightness of the pipe head, but cannot detect whether the compressive strength of the pipe head can meet the use requirements

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