Metal expansion joint with damping properties

Abstract

The utility model relates to a metal expansion joint with damping characteristic, including metal expansion joint bellows, and the metal expansion joint bellows surface is coated with damping material coating. Damping material coating is coated on the metal expansion joint bellows surface through gluing or vulcanization process. Damping material coating adopts the damping material of converting mechanical vibration energy into heat energy by utilizing internal friction and energy conversion, and reducing vibration energy through heat dissipation. The metal expansion joint of the utility model can meet the high-temperature and high-pressure resistance function and compensation demand of pipeline, and can meet the damping performance, and can also consider high strength and low stiffness.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of metal expansion joints of shock absorption, specifically a kind of metal expansion joint with damping characteristics. BACKGROUND

[0002] Metal expansion joint, also known as metal corrugated compensator or metal expansion joint, is a kind of flexible structure device specially designed to absorb and compensate the axial, lateral or angular displacement of pipeline or vessel shell due to temperature change and mechanical vibration.

[0003] The advantages and disadvantages of metal expansion joint are as follows:

[0004] Advantages:

[0005] 1) The traditional metal expansion joint adopts corrugated pipe structure, which has large axial, lateral and angular compensation capacity;

[0006] 2) The structure of metal expansion joint is relatively simple, easy to install and maintain, and convenient for standardized design and production, which reduces engineering cost;

[0007] 3) Metal expansion joint is usually made of high-strength alloy material, which can withstand high working pressure and temperature.

[0008] Disadvantages:

[0009] 1) The traditional metal expansion joint has certain damping effect, but compared with non-metallic compensator such as rubber expansion joint, its vibration transmission effect is poor;

[0010] 2) Compared with rubber expansion joint, metal expansion joint needs more space to absorb the same displacement. SUMMARY

[0011] To meet the requirements of high temperature resistance, high pressure resistance and compensation amount of pipeline, and to meet the damping performance, metal expansion joint needs to consider high strength and low stiffness at the same time. To make metal expansion joint have good damping performance, find the balance point of the two according to the vibration and impact resistance requirements of pipeline system, the utility model provides a kind of metal expansion joint with damping characteristics.

[0012] To achieve the above purpose, the technical scheme of the utility model is as follows: a kind of metal expansion joint with damping characteristics, comprising metal expansion joint corrugated pipe, the surface of metal expansion joint corrugated pipe is coated with damping material coating.

[0013] Further, the damping material coating is coated on the surface of metal expansion joint corrugated pipe by adhesive or vulcanization process.

[0014] Further, the damping material coating is a damping material that converts mechanical vibration energy into heat energy by internal friction and energy conversion, and reduces vibration energy by heat dissipation.

[0015] The utility model has the advantages of:

[0016] (1) The damping material can convert mechanical vibration energy into heat energy through internal friction and energy conversion, and reduce vibration energy through heat dissipation, thereby reducing vibration and noise of the pipeline system, reducing fatigue damage of the pipeline system, and prolonging service life.

[0017] (2) The metal expansion joint structure with damping properties is relatively simple, easy to install and maintain, and convenient for standardized design and production.

[0018] (3) The metal expansion joint of the utility model can meet the requirements of high-temperature resistance, high-pressure resistance, compensation amount, vibration reduction performance, high strength and low stiffness. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a schematic view of the metal expansion joint structure with damping properties of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings and examples.

[0021] As Figure 1 shown, the metal expansion joint with damping properties provided by the utility model embodiment is composed of a damping material and a metal expansion joint bellows. The metal expansion joint bellows 2 is coated with a damping material coating 1 on the surface.

[0022] The damping material coating 1 is coated on the surface of the metal expansion joint bellows 2 through gluing or vulcanization process.

[0023] The damping material coating 1 adopts damping material, which can convert mechanical vibration energy into heat energy through internal friction and energy conversion, and reduce vibration energy through heat dissipation, thereby reducing vibration and noise of the pipeline system, reducing fatigue damage of the pipeline system, and prolonging service life.

Claims

1. A metal expansion joint having damping characteristics, characterized by: The metal expansion joint bellows is coated with a damping material coating on the surface thereof; The damping material coating is coated on the surface of the metal expansion joint bellows by means of a gluing or vulcanization process; the damping material coating is made of a damping material which converts mechanical vibration energy into heat energy by means of internal friction and energy conversion, and reduces vibration energy by means of heat dissipation.

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