- Time:Jun 20, 2023
The expansion joint of firebrick is set to compensate the thermal expansion and cold contraction of the material at high temperature. In the process of firebrick expansion joint reservation, attention should be paid to selecting the appropriate gap form, caulking material and construction method to ensure its sealing and reliability, and pay attention to coordination and matching with the surrounding structure. At the same time, it is also necessary to strengthen the monitoring and maintenance of equipment conditions, timely repair and replacement of expansion joint caulking materials, and extend its service life. The following is to introduce the reservation method and principle of firebrick expansion joint.
First, the reservation method of firebrick expansion joint
1, linear expansion joint: linear expansion joint is usually set along the horizontal and vertical direction of the equipment, and its position should be reasonably selected according to the structural characteristics and mechanical requirements. For larger equipment, a multi-layer bidirectional arrangement can be used to separately control expansion and contraction in different directions.
2, bending expansion joint: For equipment with curved or irregular shape, you can choose to bend the expansion joint, which is curved or zigzag shape to adapt to the geometry of the equipment.
3, other forms of expansion joints: firebrick expansion joints can be set into other forms according to actual needs and design requirements, such as ring, oblique, etc., to meet different engineering needs.
4, the selection of caulking materials: firebrick expansion joint caulking materials need to have a certain high temperature resistance, corrosion resistance and sealing performance. Usually choose silicate castable, special anti-expansion mud and so on.
5, caulking construction: caulking construction needs to determine the ratio of caulking materials and construction technology according to the actual situation. Generally speaking, the preparation work such as surface treatment, cleaning, application of spacer is carried out first, and then the caulking material is evenly applied to the gap, and compacted and cured.
Second, the reservation principle of firebrick expansion joint
The expansion joint of firebrick is set to compensate for the material's thermal expansion and cold contraction under high temperature. The following is the principle of firebrick expansion joint reservation:
1, reasonable design: When the expansion joint reservation of firebrick, it is necessary to reasonably determine the width, depth and spacing of the expansion joint in accordance with the design requirements and specifications, and ensure its matching with the surrounding structure.
2, choose the right location: the location of the expansion joint of the firebrick should be selected as far as possible in the area that does not affect the safety and normal operation of the equipment, and take into account the leakage and vibration problems that may be caused.
3, choose the appropriate material: For the filling material of the expansion joint of firebrick, it is necessary to choose materials with certain high temperature resistance, corrosion resistance and sealing properties, such as silicate castable or special anti-expansion mud.
4, ensure the construction quality: the construction quality of firebrick expansion joint directly affects its airtightness and stability. Construction should be carried out in strict accordance with relevant specifications and construction drawings, and attention should be paid to controlling the amount of filling materials and the degree of filling compaction.
5, inspection and maintenance: after the completion of construction, it is necessary to test and maintain the expansion joint of the firebrick, timely clean the ash and dust on the surface of the filling material, and maintain its normal operation and service life.
In short, the firebrick expansion joint reservation should reasonably determine the requirements of design scheme, location selection, material selection, construction quality and maintenance according to the specific situation. Only construction and management in strict accordance with norms and standards can ensure its effective role and ensure the normal operation and safety of the equipment.
