Pressure testing device for pipe head of heat exchange pipe and pressure testing method thereof

Abstract

The invention discloses a pressure testing device for a pipe head of a heat exchange pipe and a pressure testing method thereof. The device comprises a test medium inlet pipeline, a pressure testing block, a fastening part and a test medium outlet pipeline, wherein the fastening part is provided with a pipe cavity for enabling the front and rear of the heat exchange pipe to be connected; an outerwall at a rear end of the fastening part is provided with an external thread in sealing connection with the pressure testing block; a front end of the fastening part is provided with top thread holeswhich penetrate through up and down; one end of the pressure testing block is provided with an opening for connecting the fastening part, and the other end of the pressure testing block is provided with an opening for connecting the test medium inlet pipeline, an interior of the pressure testing block is provided with a through hollow cavity for containing the heat exchange pipe; an inner wall atone end of the pressure testing block is provided with an internal thread connected with the fastening part, and the other end of the pressure testing block is provided with an internal thread connected with the test medium inlet pipeline; an end part of the test medium inlet pipeline is provided with an external thread in sealing connection with the pressure testing block; a ball valve and a pressure gauge are connected in the middle of the test medium inlet pipeline in series; and another ball valve is connected to the test medium outlet pipeline in series.

Description

technical field [0001] The invention relates to a pressure test device and a pressure test method for a heat exchange tube head, belonging to the field of heat exchanger manufacturing. Background technique [0002] The heat exchanger is one of the important equipment on the production equipment of refining and chemical enterprises. According to the regulations of GB151 "Shell and Tube Heat Exchanger", the heat exchange tubes after the butt joint and the heat exchange tubes of the heat exchanger with special requirements must be 100% pressure tested. . [0003] Only after the pressure test confirms that the heat exchange tube is qualified and intact can the quality of the heat exchanger after manufacture be guaranteed. If the pressure test is not carried out directly for assembly, the overall pressure test finds that the heat exchange tube leaks, which is basically impossible to deal with, especially for For heat exchangers with complex structures, sometimes only the tube he...

AI Technical Summary

Problems solved by technology

This method takes a long time to seal and fix the heat exchange tube, the operation procedure is complicated, the work efficiency is low, and a special test site must be provided. Therefore, with the development of refining and chemical enterprises, it can no longer meet the production needs; the common method is still Weld the blocking plates on both sides of the heat exchange tubes and press the inside of the heat exchange tubes. After the pressure test is completed, cut off the heat exchange tubes from the welded blocking plates. This method is not only complicated to operate, but also has low efficiency, wastes materials, and increases costs. Difficult to meet heat exchanger manufacturing quality and construction period requirements

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