Nowadays, there are more and more high-rise residential buildings, and their fire safety is very standardized in the electrical design and fire protection design of civil buildings. The quality of high-rise buildings and the acceptance of corresponding supporting facilities are also relatively strict. Residential builders generally use diesel generator sets as a backup power source for fire emergency in the event of a power supply interruption. In the city power supply is becoming more and more stable today, high-rise building standby fire power supply with the frequency of use is relatively small, but it still plays an important role, as our daily production and life of the backup power supply provides a strong guarantee. Understanding and mastering the performance and common faults of diesel generator sets can help us to be more targeted in daily maintenance and management, understand the potential hazards, and avoid providing a powerful emergency protection power supply in the event of a fire or other accident. It is especially important to reduce disasters and the loss of people's lives and property. Now on the civil high-rise buildings in the fire standby power supply diesel generator set on the maintenance and management, for everyone to learn and exchange to provide a little help.

1. Status quo of maintenance and management of diesel generator set

At present, the maintenance pipe of the fire standby power supply diesel generator set in high-rise buildings is the responsibility of the property. Due to the extremely low frequency of the equipment (especially in cities with abundant power supply), it has not attracted enough attention, and the relevant national departments have no unified regulations in this respect. Many high-rise buildings are out of touch with maintenance management after delivery. However, property management companies rarely send special personnel to receive professional knowledge training in the maintenance of diesel generator sets. Most of their maintenance and management are conducted by water and electricity maintenance workers recruited to manage diesel generator sets. Lack of proper maintenance and management knowledge, its maintenance is extensive, after a period of failure and damage, due to the low frequency of use, high maintenance costs, maintenance did not keep up, many high-rise building fire standby diesel generator set has gradually become a decoration, its management level is also uneven, many diesel generators can be put into operation normally after installation, with the passage of time. Lack of corresponding professional maintenance and technical personnel, in the fire emergency standby power supply, it often occurs that the automatic start cannot meet the requirements of successful emergency start within 30S, cannot start normally or cannot start. It has gradually become a decoration, and there is no effective diesel generator set maintenance, maintenance and management system in management.

2, improve the diesel generator set professional machine training institutions. Be certified to work

The relevant departments of the state should also designate qualified training institutions to carry out professional training according to the management methods of emergency standby power supply for high-rise civil high-rise buildings, and gradually improve the training institutions. It also stipulates the number of maintenance management personnel of the property management company for the emergency standby power supply of high-rise buildings, and formulates special management implementation measures. Property management into high-rise building management also need to obtain corresponding qualifications (including the number of qualified standby emergency fire power management technicians trained by specialized agencies). The standby emergency fire power management personnel of high-rise civil buildings must be trained by specialized agencies before they can hold certificates. The property management department has special maintenance personnel for diesel generator sets to formulate corresponding maintenance management systems according to the specific conditions of the equipment, in order to fundamentally improve the emergency standby power maintenance, maintenance management level.

3. Establish emergency diesel generator plan management system

Establish a plan for the emergency power supply of standby diesel generators. The emergency support capability of emergency standby power supply after emergencies is to ensure that the automatic starting device of standby diesel generators in high-rise residential buildings can supply power within 30 seconds in case of sudden power failure of the urban power grid. Ensure the normal supply of primary load power. So that high-rise buildings in the event of fire, or other accidents can provide emergency protection power supply capacity, in order to reduce the losses caused by disasters, and establish a corresponding maintenance system. According to the specific situation, the test system of emergency diesel generator set shall be formulated every quarter, and the standby diesel generator set shall be found in time, and the problems and deficiencies of the unit shall be found, and timely maintenance shall be carried out. Only in this way can we achieve the policy of "safety first, prevention first, and comprehensive management.

4, emergency diesel generator maintenance should pay attention to aspects

Diesel generator is a kind of independent standby power generation equipment, which is mainly used to provide emergency power supply when the mains power is suddenly cut off. In fact, the commercial power supply is becoming more and more stable, and the line system of the power department is constantly improving and perfecting. Even if the power supply department is in the case of online power outage maintenance or construction, it will reasonably dispatch the corresponding backup lines to put into operation to ensure the user's demand for power supply. At present, the probability of power outage at the client side of the power supply department is relatively small. Therefore, the diesel generator set is in the standby state, and the actual opportunity to put into use is relatively small. Usually maintenance, maintenance and inspection, mainly, lack of professional diesel generator unit maintenance, maintenance technicians, there is no perfect detection, maintenance and repair means. But this emergency standby power supply is a must-prevent-based fire protection power supply. indispensable. How to do the generator in the usual use of less circumstances, emergency can be timely power supply, safe and reliable operation, power outage after the end of the immediate shutdown. Regular maintenance of the unit is necessary to improve the maximum operating safety and service life of the unit. This paper introduces some simple methods to achieve the purpose of learning and reference.

(1) Start the maintenance of the battery: due to the standby diesel generator power supply into use less. Whether the diesel generator can start normally, the maintenance of the battery is the key. If the maintenance of the battery pack is neglected, the battery will be insufficient and the generator will not start normally. It cannot be guaranteed that the backup power will be automatically activated within 30S, causing other accidents. In case of high floor fire, the secondary water supply pressure does not operate when there is no power supply to start, resulting in insufficient water pressure and no water leading to the expansion of fire losses. The common situation is: there is voltage, but the current is not enough to drive the connecting shaft, can not start. At the same time, the battery pack has insufficient current and cannot be stopped. It is required to be equipped with floating charger equipment matching the voltage and other phase levels to ensure the normal charging and stopping of the charging equipment. Regularly check the liquid level of the startup battery pack and resupply the liquid in a timely and correct manner to ensure the normal liquid level. Keep the battery pack clean. If it is found that the battery pack fails to start or stop the standby power supply due to other reasons, the battery pack shall be replaced in time.

(2) maintenance of the starting solenoid valve: regularly check whether there is oil on the surface of the starting solenoid valve. Whether the contact ablation, so that the solenoid valve to maintain a good working condition. It can be judged by listening to the sound of starting. Under normal circumstances, when the start button is pressed, it can be started after 3s. A "click, click" sound can be heard within the 3s. If the second sound is not heard, the solenoid valve is damaged and the generator cannot be started. The solenoid valve can be started after replacement.

(3) Pay attention to the inspection of diesel and engine oil: Because the unit is in a static standby state for a long time, various materials of the unit itself will undergo complex chemical and physical changes with engine oil, cooling water, diesel, air, etc., which will eventually cause the plunger of the high-pressure oil pump. Corrosion, poor oil supply of the unit, of course, it cannot start and run normally. Thus the unit "put" bad. This should pay attention to the problem of oil. Therefore, the standby emergency generator set should be regularly maintained, inspected and started to test the machine to ensure the good condition of the unit,

(4) Maintenance of the generator: The internal and external parts of the alternator should be cleaned regularly, and the frequency of cleaning depends on the environment where the unit is located. When it needs to be cleaned, it can be carried out according to the following steps: disconnect all the power supply, wipe off all the dust, dirt, oil stains, water or any liquid on the surface, and clean the ventilation net. Because these things enter the coil, it will overheat the coil or damage the insulation. Dust and dirt are best sucked off with a vacuum cleaner, do not use air blowing or high-pressure water spray to clean. Diesel generator sets are generally placed on the ground floor of residential buildings, which are easy to cause moisture regain and reduce insulation resistance. Therefore, regular starting tests are required and the generators are dried for a certain period of time (the length of time varies according to the moisture regain degree). For drying methods and detailed maintenance, please refer to the random "Generator Operation and Maintenance Instructions".

(5) Check the following other items in daily life: Due to the space, I will not elaborate here. Can refer to the relevant information to learn. The inspection items include: ① lubrication system inspection; ② Cooling system inspection; ③ Air inlet system inspection; ④ Fuel system inspection; ⑤ Exhaust system system inspection; ⑥ Generator part inspection; ⑦ Automatic control device system inspection; ⑧ Partial inspection of control panel, ⑨ maintenance of control panel; ⑩ Inspection of diesel generator set and distribution room cleaning management and other items. For the specific unit, the user should also refer to the relevant maintenance information of the unit to give the correct implementation.

5. Conclusion

In various civil high-rise buildings, according to different regions and different urban supply and distribution designs, there are different manufacturers, models and sizes of diesel generators. Therefore, it is impossible to formulate a unified standard for maintenance. There are also different maintenance, maintenance and management systems for different purposes according to specific conditions. When selecting emergency diesel generator sets, they should not only meet the specification requirements, but also set them according to the actual situation, in order to achieve satisfactory results.