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Five elements of thermal instrument installation

by:Sure     2021-08-03
Five elements of thermal instrument installation Hits: 90 Release time: 2009-10-28 10:04:18 1. Control panel, platform, cabinet construction 1. During the transportation and installation of the panel, the paint layer of the panel is not allowed to be damaged The civil works such as ground and corners have been completed. 2. The control panel, table and cabinet are firmly fixed with bolts. 3. After the panel and cabinet are installed, the five elements of the installation of industrial and thermal instruments that cause violent vibrations should not be carried out on them. Clicks: 90 Release time: 2009-10-28 10:04:18 1. Control panel, platform and cabinet construction 1 , During the transportation and installation process of the tray, it is not allowed to damage the paint layer of the tray and the corners of the ground and other civil works that have been completed. 2. The control panel, table and cabinet are firmly fixed with bolts. 3. Do not perform work that causes severe vibration on the panel and cabinet after installation. 4. Panels and cabinets should have obvious grounding, and the grounding should be firm and reliable. 5. The power circuit inside the panel is well insulated. 6. The connecting bolts between the panels are complete and fastened. The connecting bolts of the busbars in the panels and cabinets are fastened with a specified torque wrench. 7. The levelness, verticality, and clearance between the panels and cabinets must meet the standard requirements. 2. Laying of instrument pipe 1. The position of the primary door should be convenient for operation and maintenance, and meet the design requirements. 2. Convenient maintenance and operation are required when the secondary door, sewage door, and balance door are installed in a centralized manner. 3. The internal cleaning and purging should be carried out before the instrument tube is laid, and then purging before the tightness test. 4. The pipeline must consider the thermal expansion of the main equipment and pipeline, and compensation measures should be taken to ensure that the pipeline is not damaged. 5. When the instrument pipe is laid horizontally, it should have a certain slope and the correct direction, the differential pressure pipe should be greater than 1:12, and the pressure pipe should be greater than 1:100. 6. The laying of steam and water pressure pipes should avoid up and down 'U' Type bend. When a 'U'-shaped bend occurs under special circumstances, an exhaust valve must be installed at the highest point and a sewage valve at the lowest point. 7. Spacing of horizontal pipe support: steel pipe 1~1.5m, copper pipe and plastic pipe 0.5~0.7m; vertical pipe support distance: steel pipe 1.5~2m 8. The pipeline must be fixed with detachable clips. 9. A temporary sign should be hung up during the construction process, and an official sign should be hung up after the construction. The sign should be neat, beautiful and clear. 3. Wiring of shielded cable 1. Shielded cable must be laid according to the design model and cannot be substituted. 2. The shielded cable should be grounded at one end, and the grounding shall be uniformly specified to the side of the central control room, floating on the spot. 3. If the shielded cable has intermediate connectors, the shielding layer should be connected well and the insulation should be handled well. 4. Temperature and pressure sampling openings 1. The sampling location should meet the requirements of the drawings to meet the convenience of installation and maintenance. 2. To make holes in pressure pipes and equipment, mechanical processing should be used; the holes in the air and smoke pipes can be cut with oxygen, but the holes should be rounded and filed. 3. When installing temperature measuring components on pipelines below Φ76mm, the method of installing an expansion tube should be adopted. 4. When opening holes in closed pipes or equipment, measures must be taken to prevent iron filings from falling. 5. The sampling pipe from the pressure sampling point to the primary door should be less than 10m. 6. The oil-free compressed air branch pipe should be led out from the upper half of the main pipe. V. Installation of temperature measuring components 1. When soldering component sockets, the component core must be pulled out and then installed after cooling. 2. The thermal resistance insulation check should be greater than 0.5MΩ. 3. The connection terminal of the component is connected to the fixed protection nozzle, and the cable should have enough length for the expansion of the thermal system
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