Details of mechanical and electrical installation

Details of mechanical and electrical installation

First, the problem of cross operation in construction engineering construction, mechanical and electrical installation construction, often involves mutual cross operation, mainly refers to the cross operation with civil engineering and decoration engineering, if the problem of cross operation can not be properly handled in the construction, it is easy to cause the construction process can not be effectively connected, which has a serious impact on the construction progress and efficiency. In this case, it is necessary to negotiate and communicate with the owner, the contractor and the civil engineering party, strengthen cooperation, and appropriately adjust the process, so as to ensure that the construction progress will not be delayed.

Second, the management of concealed laying pipe. In the mechanical and electrical installation engineering, it often involves the need to lead the concealed laying pipe from the floor. Therefore, in the wall construction, it is necessary to carefully review the construction drawings, accurately locate the terminal box, and implement the standardized construction operation combined with the corresponding construction documents and the owner's requirements.

Third, the management of electrical pipelines. The number of electrical pipelines is large and the lines are long. Therefore, in the installation of electrical pipelines, it is necessary to plan the electrical pipelines neatly, check the stability and firmness of the supports, especially pay attention to whether the bending radius of the conduit and the radius of the cable conduit meet the relevant standards, check whether the edge of the gateway is smooth and horn shaped, and check the stability of the supports At the end of the cable operation, also pay attention to the sealing protection.

4. Large amount of work and a wide range of cooperation. Construction engineering is complex and systematic. In an engineering project, civil construction, decoration and mechanical and electrical construction are often carried out at the same time. At this time, mechanical and electrical installation engineering needs to cooperate with multiple project parties for construction. At the same time, it needs more professionals, and involves multiple majors, so the amount of work is also large And then it increased.

V. construction technical problems in mechanical and electrical installation engineering (I) joint review of drawings before mechanical and electrical installation construction, it is necessary to conduct strict joint review of construction drawings, have a comprehensive understanding of construction projects and requirements, carefully analyze whether there are errors and problems, make corresponding records, point out and correct them, and control possible errors in construction from the source as far as possible 。 The key points of the joint review of drawings include: whether there is any inconsistency between the mechanical and electrical construction plan and the civil engineering plan; whether the location, size and size of the specific mechanical and electrical equipment meet the relevant requirements; whether there is any error in the number and diameter of wires between the plan and the distribution system diagram. At the same time, it is also necessary to check whether the contents of the drawings meet the relevant quality standards and technical requirements, and whether there are perfect measures for safe use of electricity and other specific details.

(2) the installation of electric box, distribution box and distribution cabinet is generally arranged after the completion of civil ground construction. In the specific installation construction, it is necessary to ensure that the installation position is accurate, the incision is flush and the relevant parts are complete. For the concealed distribution box, the box cover should be close to the wall, and the neutral line should be connected through the bus bar. At the same time, check whether there is splicing, and set a clear circuit number. When there are too many circuits, use auxiliary tools to bind them into bundles to ensure that the inside and outside of the panel are clean and tidy.

(3) cable laying: cable laying is a kind of construction item with wide coverage in mechanical and electrical installation engineering. Before formal laying, it is necessary to check the cable model, specification and performance to ensure that the specification and model can meet the design requirements, the appearance is complete, the humidity is qualified and has good insulation performance before it can be put into use. In order to ensure that the cable can be put into use continuously in the future, the cable insulation test should be carried out to ensure that the sealing end has high tightness. During the construction, the principle of bottom-up should be followed when laying low-voltage power, strong power control cable and high weak point cable respectively. When the cable and control cable are constructed on the same side, the force cable should be placed above the control cable. At the same time, in strict accordance with the installation process, professional and technical personnel should be selected to make the terminal head and intermediate joint of the support cable, so as to ensure that the stripping and cutting process is continuous, so as to prevent the occurrence of moisture, which has adverse effects on the performance and quality of the cable.

(4) system debugging system debugging is an indispensable technical control link in the later stage of mechanical and electrical installation. Its function is to inspect the installation of additional lines, and verify whether the quality and performance of mechanical and electrical equipment meet the design requirements. In this link, it is necessary to focus on checking whether each process can meet the relevant use standards, and whether the process cannot be undertaken by China In order to ensure the normal operation and effective use of mechanical and electrical equipment, we should carefully write the commissioning report and adjust the unqualified or defective parts.