Double three-way expansion joint in cement industry

Product Introduction

Product Introduction of Duplex Three-way Expansion Joint in Cement Industry

Product Definition and Core Functions

The duplex three-way expansion joint for cement industry is a flexible compensation device specially designed for cement production line. It is mainly used to absorb the pipeline system caused by temperature change, mechanical vibration or foundation settlementAxial, transverse and three-dimensional composite displacement。 Its core functions include:

1. Multi-directional compensation ability: Through the design of the bellows structure, it can compensate the axial expansion and contraction, lateral offset and angle change at the same time.

2. Reduce system stress: Effectively alleviate the thermal expansion difference caused by temperature difference of tube-plate heat exchangers, preheaters and other equipment, and avoid strength damage, instability or pull-off of connectors caused by stress concentration.

Structural characteristics and technical advantages

1. Duplex Structure Design：

• Adopt the combination of double bellows and intermediate pipe, and passTie rod, hinge plateEqually constrained elements achieve multi-directional displacement absorption, and their stability is better than that of unitary structures.

• Optional configuration with seat (ZB type) or without seat (ZA type) to suit the needs of different installation scenarios.

• The corrugated pipe is made of austenitic stainless steel (such as 304, 316L), which is resistant to high temperature (up to 1200℃) and dust corrosion, which is suitable for high wear environment of cement plant.

• The outer covering layer is made of multi-layer fiber fabric (such as aramid and polyimide) to enhance the sealing and temperature resistance.

• The design pressure range is usually-0.1~0.25MPa, which is suitable for atmospheric or low pressure pipeline systems, such as waste heat power generation, pulverized coal transportation and other scenarios.

Typical Application Scenarios

In the cement production line, the product is widely used in the following systems:

1. Raw material handling: Hot air duct compensation of raw material dryer and raw material grinding system.

2. Preheating and Calcination: RSP cyclone preheater inlet and outlet air ducts, kiln tail smoke chamber connection section.

3. Cooling and conveying: Clinker cooler blower outlet, pulverized coal preparation system pipeline.

4. Environmental Protection Facilities: Displacement absorption of flue gas pipeline at the inlet and outlet of dust collector and desulfurization and denitrification system.

4. Key points of installation and maintenance

1. Directions and Constraints: Installation shall be marked according to the flow direction of the medium, and the structure of the lined cylinder shall ensure that the lining direction is consistent with the fluid; After installation, remove the transport protection and adjust the limiting device.

2. Stress control: It is prohibited to forcibly correct the deviation of the pipeline through the deformation of the bellows. After the hydraulic test, the accumulated water should be emptied in time and the bellows should be dried.