Water pumps burn the motor mainly for the following reasons.

Starting with a load can cause damage to the motor, the actual use of head is too much lower than the pump nameplate head; submersible pumps without water working time is too long.

First of all, first figure out the motor burn is burned bearing (mechanical failure) or burned coil (electrical failure).

If the fault is burned coil, mainly due to overcurrent, sometimes the voltage is too high or too low can also cause the coil to heat short circuit, so first check whether the voltage when running is too much different from the rated voltage.

Overcurrent short circuit, there may be several reasons.

Equipment overload operation, so that the motor runs at or over rated current for a long time. Special attention should be paid to the fact that the starting current of the motor is 3-5 times the rated current, so you should try to avoid starting the equipment with a load or running at full load (it mainly depends on the matching margin between the rated current of the motor and the normal running current)

The motor works in a more humid working environment. Before starting the motor, the insulation of the coils should be checked for ground and phase insulation, the insulation requirements are different for different voltage levels and can be checked with reference to the relevant national standards. During the operation of the motor, attention should be paid to the waterproofing and moisture-proofing of the motor.

The mechanical failure of the pump machine causes the motor to be overloaded, the current is too high and the coil is burnt.

The heat dissipation of the motor goes wrong. General motor coils are air-cooled shells, submersible pumps are water-cooled shells. Large motors mostly use air-air heat exchangers, air-water heat exchangers for cooling. If the cooling water (air) is broken, so that the coil can not dissipate heat, are likely to burn the coil.

The head of the centrifugal pump is used to overcome the height and resistance, high head of the pump in the high head point of work when his flow is the design point of the flow, if the work at low head, equivalent to the pump outlet resistance is reduced, when the flow of the centrifugal pump will increase, the motor will be overloaded, super to a certain extent will burn the motor. For example, the head of a water pump is 50 meters, the flow is 50 cubic meters / hour, when it to 50 meters high to give water, its flow is 50 cubic meters / hour, when it to 40 meters high to give water, its height and resistance to reduce its flow may reach 80-90 cubic meters / hour or more, then the motor will be hot or burned.


1、Correctly choose the working point of the fire pump. Each kind of pump has a certain working pressure range, such as: 2BV series water ring vacuum pump working pressure range 760mmHg ~ 25mmHg (absolute pressure), in such a wide pressure range, the pump pumping speed with the pressure and change (detailed changes refer to the pump performance curve), its stable working pressure range of 760 ~ 60mmHg. Therefore, the working point of the pump should be selected within this range More suitable, and can not let it in 25 ~ 30mmHg under long-term work.

2, the working pressure of the fire pump should meet the limit of fire fighting equipment and working pressure requirements. For example, if a vacuum drying process requires a working vacuum of 10mmHg, the ultimate vacuum of the selected vacuum pump should be at least 2mmHg, and it is better to reach 1mmHg. Usually the ultimate vacuum of the selected pump should be half to one order of magnitude higher than the working vacuum of the vacuum equipment.

3、The correct combination of fire pumps. Because the fire pump has selective pumping, therefore, sometimes choose one kind of pump can not meet the pumping requirements, need several pumps combined, complement each other to meet the pumping requirements. For example, the titanium sublimation pump has high pumping speed for hydrogen, but cannot pump helium, while the three-pole sputtering ion pump, (or two-pole asymmetric cathode sputtering ion pump) has a certain pumping speed for argon, the combination of the two, it will make the vacuum device to get a better vacuum. In addition, some vacuum pumps can not work under atmospheric pressure, need pre-vacuum; some vacuum pumps export pressure is lower than atmospheric pressure, need pre-stage pump, so all need to use the pump combination.

4、The fire pump should be able to discharge the whole amount of gas produced in the process of fire fighting equipment under its working pressure.

5, fire fighting equipment on the requirements of oil pollution. If the equipment strictly requires no oil, you should choose a variety of oil-free pumps, such as: water ring pumps, molecular sieve adsorption pumps, sputtering ion pumps, cryogenic pumps, etc.. If the requirements are not strict, you can choose to have oil pumps, plus some anti-oil pollution measures, such as adding cold traps, baffles, oil traps, etc., can also achieve clean firefighting requirements.

6、How about the influence of oil vapour discharged from the fire pump on the environment. If the environment does not allow pollution, you can choose an oil-free fire pump, or discharge the oil vapour to the outside.

7、Know the composition of the gas being pumped, whether the gas contains condensable vapour, whether there are particles of dust, whether there is corrosiveness, etc. When choosing a fire pump, you need to know the composition of the gas and choose the appropriate pump for the pumped gas. If the gas contains vapour, particles, and corrosive gases, you should consider installing auxiliary equipment such as condensers and dust collectors on the inlet pipeline of the pump.

8. The vibration generated by the fire pump has no effect on the process and the environment. If the process does not allow, a vibration-free pump should be selected or anti-vibration measures should be taken.

9、The price, operation and maintenance cost of the fire pump.

Diesel fire pumps are a more common piece of equipment often used in fire fighting systems. Our primary consideration when purchasing a pumping station is of course to choose a manufacturer, not only because of the higher cost performance, but also for another reason that the manufacturer has the feature of customizing the fire pump set on demand, according to the customer's needs and choosing the features to customize the fire pump set.

zjbetter professional custom fire pump manufacturers, the company produces zjbetter brand fire equipment are produced by the company's own, its advantage is that the fire can not power, can start normally, to protect fire safety. With a wide range of type spectrum, automatic operation, automatic alarm, automatic start and other functions. It is widely used by various fire hydrants, sprinkler pumps, fire pressure boosting and stabilizing pumps, by various villas, communities, industrial/civil buildings, oil depots, logistics parks, etc.

Diesel fire pump sets sometimes have the appearance of oil leakage, so how do we go about analyzing the part of oil leakage, and then solve the problem, we introduce the following solutions for you.  

In the long-term operation of fire pumps, there are often problems, large and small, and we need to understand how it can be maintained: the

  The above-mentioned problems, the common solution for businesses is to repair in welding or brushing machine, but they all have some disadvantages: the high temperature welding repair of thermal stress can not be completely eliminated, easy to cause material damage, resulting in bending or fracture composition; and brushing coating thickness limit, easy to peel, the above two methods are used to repair metal metal, can not change the "hard on hard "Coordination relationship, under the action of forces, will cause wear out. Modern western countries have more than polymer composite materials used in the repair of problems, with superb adhesion, high compressive strength of the overall performance.

  Polymer materials in the repair of the application, can be exempted from the removal of processing, are no complementary welding heat impact and repair thickness is not limited, the product licensed metal materials, can absorb the impact of the fire pump, to avoid re-wear, extend the service life of equipment and large parts, for the enterprise to save a lot of downtime, to obtain a huge economic value.

On November 11, the opening ceremony of Quzhou Open University and the new campus was held at the new campus at No. 7 Xuefu Road, Wisdom New Town, Kecheng District, Quzhou City. Xu Gongfang, Secretary of the Party Committee of Zhejiang Open University, Xu Xuqing, Deputy Director of the Standing Committee of the Quzhou Municipal People's Congress, Li Ning, Vice Mayor of the Quzhou Municipal Government, Huang Weiqing, Vice Chairman of the Quzhou Municipal Committee of the Chinese People's Political Consultative Conference, Xu Genius, Deputy Secretary General of the Quzhou Municipal Government and relevant departments at the Quzhou City level attended.

Luo Weihua, General Manager of ZJ BETTER TECHNOLOGY GROUP CO. LTD. was also invited to participate in the Quzhou Open University inauguration and new campus opening ceremony as the head of the school's teaching and practice base.

Fu Yuanxun, Party Secretary of Quzhou Open University, presided over the unveiling ceremony and Xu Genius, Deputy Secretary General of Quzhou Municipal Government, read out the approval document of Quzhou Municipal People's Government.

The site was unveiled for Quzhou Open University, Quzhou Community Education Guidance Centre, Quzhou Community Family Education Guidance Service Centre, the first batch of school professional practice bases were awarded and visiting professors were appointed to issue appointment letters.

ZJ BETTER TECHNOLOGY GROUP CO. LTD. became the first batch of professional practice bases of Quzhou Open University.

The cooperation between Quzhou Open University and ZJ BETTER can strengthen students' technical skills and practical abilities, as well as deepen their understanding of the society, the people, the market and the enterprises.

At the same time, the "university-enterprise cooperation" model can also stimulate the innovative vitality of enterprises, help them overcome technical difficulties, promote the exchange of talents and the transformation of scientific and technological achievements, and achieve win-win high-quality development for all parties.

The inauguration of the new university will provide strong scientific and technological support for ZJ BETTER TECHNOLOGY GROUP CO.

President of Quzhou Open University, Mr. Bi Ming, awarded a plaque to the professional practice base.

In raising this question, let us first understand what the fire protection electrical control device is, the fire protection electrical control device is used for the fire pump start, automatic control and inspection, with control, accept the signal, check the operating status, issue an alarm and other functions.

Control cabinet suitable for the main role of control and inspection, a variety of small communities, villas and other fire fighting water supply systems, industrial or civil buildings, libraries, oil loading and unloading terminals, logistics parks, hospitals, schools, Shi type square and other public facilities of various fire hydrants, sprinkler fire main pump, fire booster stabilized water supply equipment and other fire fighting water supply systems.