Hydraulic expanded connection tool

Abstract

The invention relates to a hydraulic expanded connection tool. The hydraulic expanded connection tool comprises a pressure test bundle section, an elbow pipe, a needle-type valve, a connector, retaining rings, Y-shaped sealing rings, an expansion joint, a straight pipe, a gauge support and a pressure gauge, wherein the retaining ring and the Y-shaped sealing ring are arranged at each of the two ends of the expansion joint respectively in a sleeving manner; the connector is fastened in the expansion joint; the two ends of the expansion joint are connected with the connector respectively; the needle-type valve is connected onto the elbow pipe; the pressure test bundle section is welded on the elbow pipe; the straight pipe is welded on the elbow pipe; the gauge support is connected with the straight pipe; the straight pipe is connected with the pressure gauge by the gauge support. The hydraulic expanded connection tool is simple and reasonable in structure; a heat exchanging pipe can be in tight fit with a pipe plate; the manufacturing cost is low and the expanded connection problem of a large-diameter and unconventional pipe and the pipe plate can be solved by a simple and reliable manner; the hydraulic expanded connection tool is simple to operate, light in labor intensity, short in manufacturing period and good in expanded connection quality, and is reliably suitable for occasions with higher pressure; the expanded connection quality is easy to control and the expanded connection tightness is easy to control.

Description

technical field [0001] The invention relates to a hydraulic expansion joint tool, which is used for a set of tool in manufacturing, so that the heat exchange tube and the tube sheet can be tightly bonded, and belongs to the technical field of tool fixtures. Background technique [0002] In the manufacturing process of chemical equipment, the expansion joint process of connecting tube and tube sheet is the core part of the product, which will directly affect the performance and life of the product, and is also the most important part of the production of shell and tube heat exchangers. At present, the main expansion joint technologies in China include explosive expansion joints, rubber expansion joints, mechanical expansion joints, and hydraulic expansion joints. Among them, the cost of explosive expansion is relatively high, the compatibility of the expansion joint between the nozzle and the tube sheet material is limited, the service life of the rubber expansion joint is r...

AI Technical Summary

Problems solved by technology

Among them, the cost of explosive expansion is relatively high, the compatibility of the expansion joint between the nozzle and the tube sheet material is limited, the service life of the rubber expansion joint is relatively low, and the mechanical expansion joint method is relatively widely used, but the labor intensity is relatively high, and the operator mainly According to the experience to determine the expansion joint tightness, the quality of the expansion joint is greatly affected by human factors, the work efficiency is low, and the nozzle will be polluted to reduce its service life, and when the tube plate is too thick, the full thickness expansion joint cannot be realized. Compared with the previous In terms of the three methods, the hydraulic expansion joint can perform uniform expansion of the full thickness at one time, expand the internally threaded pipe or seam welded pipe, digital automatic control, the expansion pressure can be accurately set, the operation is simple, and the expansion quality is excellent. Reliable, low labor intensity, high production efficiency, etc., has good expansion advantages, but the domestic production is mainly for conventional heat exchange tube hydraulic expansion devices, and can perform well on pipe diameters from 10mm to 100mm and thin-walled pipes from 1mm Expansion joints, but tooling for unconventional or large-diameter heat exchange tubes is relatively rare. If the tooling is produced by the method of producing small-diameter, conventional heat exchange tube hydraulic expansion devices, the cost is too high

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