Plate pressure flange type pipeline connecting device

Abstract

The invention provides a plate pressure flange type pipeline connecting device. The device comprises a flange type pipe piece, a left pipe and a right pipe, and the left pipe and the right pipe are distributed oppositely and connected through the flange type pipe piece; the flange type pipe piece comprises a left flange plate pipe piece, a right flange plate pipe piece and a flange plate sealing ring, wherein the flange plate sealing ring is located between the left flange plate pipe piece and the right flange plate pipe piece. The left flange plate pipe piece comprises a flaring type outer section, a necking type middle section and a flange plate type inner section, a flanging is arranged at an end opening in the left side of the flaring type outer section, and a flaring cavity in the flaring type outer section is in transitional connection with a necking cavity in the necking type middle section through a 45-degree cavity; a stepped cavity is formed in the right side of an inner hole in the right flange plate pipe piece. By means of the plate pressure flange type pipeline connecting device, the sealing effect can be improved to a great extent, the service life can be increased to a great extent, it is ensured that the pipes cannot be separated from the cavities of the flange type pipe pieces, so that the anti-pullout function and the heat expansion and cold contraction resisting function are achieved while the sealing effect of the pipeline is ensured, the production cost can be greatly reduced, the tedious flange type pipe piece welding steps are omitted, and ore resources are saved.

Description

technical field [0001] The invention relates to the technical field of pipe fittings, in particular to a disk flange type pipe connection device. Background technique [0002] A pipeline is a device used to transport gas, liquid or fluid with solid particles connected by pipes, pipe connectors and valves. Usually, after the fluid is pressurized by blowers, compressors, pumps and boilers, it flows from the high-pressure part of the pipeline to the low-pressure part, and it can also be transported by the pressure or gravity of the fluid itself. Pipelines are widely used, mainly in building water supply, drainage, heat supply, gas supply, long-distance transportation of oil and natural gas, medical oxygen, agricultural irrigation, hydraulic engineering and various industrial devices. With the continuous application of pipelines, for The design of the connectors that connect the pipes is also evolving. At present, the sealing effect of various existing metal pipe fittings is n...

AI Technical Summary

Problems solved by technology

At present, the sealing effect of the existing various metal pipe fittings is not ideal, and the metal pipe fittings with good sealing effect are also difficult to popularize due to the high production cost.

In addition, the old-fashioned flange connection technology is completed by welding and pipe butt joints. The welding workload is large, and there are great fire safety hazards on site. Polished sparks also cause safety hazards to the surrounding environment, and flaw detection equipment is required one by one after welding. inspection, heavy workload

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