Flange assembly suitable for flue pipe connection

Abstract

The invention discloses a flange assembly suitable for flue pipe connection. The flange assembly comprises flange plates connected to a flue pipe in pairs, a non-metal expansion joint body arranged between the paired flange plates and side-buckling-type pressing blocks used for connecting turned edges of the non-metal expansion joint body and the flange plates in a clamped mode. The edges of the peripheries, facing the outer plate faces, of the flange plates are provided with notches evenly distributed in pairs, and first screw holes are formed in the notches. The pressing blocks are in a U shape, equal to the notches in number and provided with second screw holes corresponding to the first screw holes, and the pressing blocks penetrate through the first screw holes and the second screw holes through screw rods and then are locked through nuts and connected to the notches of the flange plates. The flange assembly is simple in structure, convenient to disassemble and assemble, longer in service life and high in practicability, the situations that deformation is generated when local mounting of the turned edges is conducted, and the deformation face is enlarged after use can be eliminated, and the airtightness of the non-mental expansion joint body is not affected; holing operation conducted on the turned edges of the non-mental expansion joint body can be omitted, and the production cost is lowered; the mounting speed is high, and the assembling efficiency can be improved greatly.

Description

technical field [0001] The invention relates to a pipe connection device, in particular to a flange assembly suitable for flue pipe connection. Background technique [0002] The flange is a part that connects the pipe to the pipe. It is connected to the pipe end. Therefore, the tightness of the connection is an important parameter characteristic for testing the quality of the flange. If the seal is not good, it is prone to water seepage and air leakage. [0003] In the boiler and its flue system, due to thermal expansion and contraction of thermal equipment, there are thermal displacements of different lengths among its components, which has caused a lot of trouble for the positioning and support of the boiler and its flue. In order to solve this kind of problem, manufacturers or design units usually consider using expansion joint structure. [0004] In the prior art, the metal expansion joint structure is usually used, which can indeed solve the problem of thermal expansio...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, the metal expansion joint structure is usually used, which can indeed solve the problem of thermal expansion, but it has great limitations. Because of the reason of the mold, especially in non-standard and large-size occasions, there are high costs, Poor versatility and other deficiencies

Therefore, in the improved technical solution, a non-metallic expansion joint is used, which realizes the detachable connection with the pipe connection flange through the hole in the flange. Generally, bolts are used to penetrate the hole in the flange, but this type of structure will cause cracks. The flange part near the hole is compressed and deformed, and the deformation increases after the constant thermal expansion and contraction, which directly affects the sealing performance of the non-metallic expansion joint, resulting in adverse phenomena such as smoke leakage.

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