Key points of incoming supervision and control (1) galvanized steel pipes and pipe fittings entering the site shall be galvanized evenly inside and outside, without corrosion, without flying thorn on the inner wall, and the pipe fittings shall not be buckled, screwed, screwed incompletely. After the materials enter the site, each batch of pipes with different specifications shall be inspected according to the specification requirements, and can be used in this project only after passing the inspection. (2) When the valve comes into play, professional engineers should check it and use it only after it is qualified. Valves must have the factory certificate, and the specifications, models and materials meet the design requirements. (3) Organize the owner, contractor and supervisor to accept the field equipment. (4) The sprinkler, alarm valve, pressure switch, water flow indicator and other main system components in the automatic sprinkler system should be strictly inspected when entering the site. The use of products must have the documents approved by the fire department. When equipment and components enter the site, in addition to the general production qualification certificate, there must also be a written certificate that the national fire product quality supervision and inspection center has passed the test. The models, specifications and trademarks of equipment and components shall meet the design requirements, and there shall be clear nameplates or signs. Water flow indicator and alarm valve should also have permanent signs of water flow direction. Before installation, functional inspection and appearance inspection should be carried out one by one. Close the nozzle should be leak test, with no leakage, no damage as qualified.
When the installation of control points in construction begins, the work to be coordinated gradually increases. Fire engineers may have to face teams such as electrical installation, water supply and drainage and fire protection system installation, elevator installation, fire shutter control, ventilation engineering, gas fire extinguishing system, emergency generator set, building automation and automatic fire alarm. For the smooth progress of the project, it is necessary for the supervision engineer to convene relevant personnel to hold a coordination meeting to clarify the responsibilities of all parties. Attention should be paid during construction: (1) Pipeline installation: Before pipeline installation, the pipeline should be straightened and the impurities in the pipeline should be removed. During installation, sundries in the installed pipeline shall be removed at any time. The exposed area where the installation is completed or interrupted should be closed or temporarily closed to prevent foreign objects from entering the lumen. All reserved nozzles should be plugged in time to prevent flooding accidents caused by omission. Installation should follow the principle of installing large-diameter main pipe and riser first, and then installing small-diameter branch pipe. In the installation process, continuous installation shall be carried out according to the connection sequence, so as to avoid the difficulty in connection between segments and affect the overall performance of the pipeline. After installation, there should be no wave phenomenon of collapse and arching and snake-shaped bending phenomenon of left and right twisting. Pipeline installation should be horizontal and vertical. When the exposed pipes are installed in rows, the straight pipe parts should be parallel to each other; The curved part, when the pipeline is horizontal or vertical, should be equidistant from the straight part; When the pipes are horizontal and parallel, the radius of curvature should be equal. (2) Installation of fire hydrants: fire hydrant box should adopt products that meet the design requirements, and can only use them with the manufacturing license and certificate issued by the fire department. When fire hydrant box is installed on the light partition wall, reinforcement measures should be taken. The fire hydrant branch pipe shall be positioned according to the coordinates and elevation of the plug valve, and installed after the plug valve is aligned and stabilized. Fire hydrant fittings should be installed before the completion of the project, and the fire hose should be folded and placed on the hanger or rolled up and tightly placed in the box. (3) Installation of fire sprinkler: The sprinkler installation shall be carried out after the system pressure test and flushing are qualified. The specification, model and working temperature of the nozzle shall meet the design requirements. The protection area of nozzle installation, nozzle spacing, and the distance between splash plate and floor, wall, beam, column, hole and ceiling shall meet the design and specification requirements. When installing the nozzle, it is forbidden to disassemble or modify the nozzle, and it is forbidden to attach any decorative coating on the nozzle. (4) Installation of fire water pump unit: The fire water pump shall be installed according to the design requirements. The installation sequence is that the check valve and the valve are fastened to the equipment in turn. The handwheel direction of valve installation should be easy to operate. Please refer to the installation of pump house for the specific installation process. Check valve and pressure gauge should be installed on the outlet pipe of fire pump, and drain valve for inspection and water testing should be installed; A pressure gauge and a drain valve should also be installed on the main outlet pipe of the fire pump unit. (5) Installation of fire-fighting adapter: The fire-fighting pump adapter shall be assembled in the order of interface, body, connecting pipe, check valve, safety valve, exhaust valve and control valve. The check valve shall be installed in such a direction that fire water enters the system from the fire water pump adapter. Fire pump adapters should be installed on sidewalks or non-motor vehicle driving areas that are convenient for fire engines to pass. The ground fire pump adapter should be provided with a fixed sign different from the fire hydrant. (6) Installation of alarm valve group: The water source control valve and alarm valve should be installed first, and then the auxiliary pipeline of alarm valve should be connected. The connection of water source control valve, alarm valve and water distribution main pipe should make the water flow in the same direction. The installation position of the alarm valve group should meet the design requirements, and it should be located in an obviously easy-to-operate position with a height of about 1 m from the ground. The ground at the alarm valve should be drained, and the ambient temperature should not be lower than +5℃. And install drainage facilities on the indoor ground where the alarm valve group is installed. The pipes before and after the alarm valve should be filled with water smoothly, and the water pressure alarm bell should not give an alarm by mistake when the pressure fluctuates. The filter on the alarm water flow path should be installed in front of the retarder, and it is convenient for slag discharge operation. 3. When entering the system debugging stage, the main work of the fire professional supervision engineer is to urge the owner to contact the water supply company and the electric power bureau as soon as possible, and put the formal water supply and power supply of the project on the agenda, so as to prepare for the normal fire inspection and acceptance. Ensure that the fire pump, spray pump water pump adapter and circular fire lane are basically in place. Set up a leading group for fire-fighting linkage debugging, instruct a special person to write a detailed debugging plan, define the division of labor, and assign responsibilities to people. After the preparatory work is completed, the single system shall be debugged first. Ensure the normal operation of each equipment with no load and single machine. After the single machine runs normally, the linkage debugging of the whole fire protection system can be started. Fire professional engineers should carefully review the linkage debugging scheme and debugging plan, and urge all professional subcontractors to hand over the debugging results and interface descriptions of each subsystem to the person in charge of linkage debugging project in writing. Supervise the automatic fire alarm subcontractors to complete the design, installation and debugging of the graphic display system of the central fire control room as soon as possible according to the architectural plane design, so as to prepare for the formal acceptance of fire control. (7) The outdoor fire fighting and sprinkler pump adapters are generally subject to the rigorous test of fire truck suppression, so before the acceptance, the construction personnel should be urged to carefully test the pressure to ensure that they meet the requirements. The whole fire linkage debugging work may last for several days. Fire professional supervision engineer should urge all relevant units to send people to cooperate, repair the faults of each subsystem in time according to the problems reflected in the debugging process, and record the debugging situation in detail. After debugging, urge the debugging personnel to complete the debugging report as soon as possible, and attach the relevant records printed by the host computer. After the linkage test is qualified, the fire professional supervision engineer may require the owner to formally apply for fire acceptance, and urge the construction unit to do a good job of rectification after acceptance. Conclusion Through this paper, the key links in the construction of high-rise building fire protection engineering are controlled, and it is hoped that the construction enterprises of building fire protection engineering can learn from it, strengthen the supervision and management of the construction site, improve the traditional construction methods, improve the technical quality of employees themselves, truly do a good job in building fire protection engineering, and bring people a safe and harmonious living place. It is suggested that Xi 'an Ossification Fire & Security Company can do the quotation, design, construction, reporting procedures, installation, debugging, filing, modification, testing, acceptance, procedures and maintenance of fire protection engineering, security engineering and weak current engineering.