1.1 Product Features

FQ type mine pneumatic press-in axial flow local fan (hereinafter referred to as pneumatic fan) is a new product developed by our company. The product has the characteristics of compact structure, small size, light weight, simple operation, convenient maintenance and good safety performance. The blades of this series of pneumatic fans and the materials of the corresponding shells have been tested for friction and spark safety, which can ensure that they can be used in places with gas.

1.2 Main purpose and scope of application

This series of pneumatic fans adopts the structure that compressed air drives the air motor to drive the impeller to rotate. It is suitable for press-in local ventilation in coal mines, and can also be used as local ventilation equipment for metallurgical mines and tunnel projects. It has a wide range of uses.

1.3 Environmental conditions for use

The conveying medium is air, the dust content is not more than 10mg/m3, and the medium temperature is -200C～+350C. The elevation of the fan installation location is -1000m～+1000m.

1.4 Working conditions

The air supply volume should be greater than the maximum working air volume of the pneumatic fan.

The foundation for installing the pneumatic fan should be solid, and there should be no exposure to the sun or rain around. The height of the air inlet edge of the pneumatic fan from the ground or the top wall should not be less than 0.3m.

1.5 Service life

The service life is not less than 4 years, and the safe operation time before the first overhaul is not less than 1200h.

2 Safety Precautions

2.1 Operators must be trained, familiar with the operation, qualified, and then work with a certificate;

2.2 Operators must read this instruction manual carefully before using the drill;

3 Structural features and working principle

3.1 Structural features

This series of pneumatic fans is composed of air collector 1, impeller 2, casing 3 and air motor 4 and other components. Pneumatic fan casing, air collector and other structural components are welded with low carbon steel plates, the air motor is connected to the casing with bolts, the impeller is welded together by the hub, blade, hollow shaft, and web, and the output of the impeller and the air motor is The shafts are directly coupled.  

The air motor is a gear motor with simple structure and long service life. The compressed air is supplied by the downhole compressed air pipeline and connected with the air motor inlet by a rubber hose.

3.2 Working principle

After the compressed air drawn from the underground compressed air pipeline is connected with the air motor inlet on the pneumatic fan casing through the rubber hose, the valve is opened, the compressed air drives the motor to rotate and drives the wind impeller to rotate, and the impeller does work on the air, so that the air has energy and then moves at a certain speed. The exhaust fan is guided to the place where it is needed by the air duct.

4 main technical parameters

4.1 The composition of the model and its representative meaning

          

Labeling example: FQNo4: F means fan; Q means pneumatic; 4 means impeller diameter 4dm.

5 Installation and commissioning

This series of pneumatic fans has a handle. It can be used not only for portable movement but also as a hanging hole when in use. It must be fixed when placed in the roadway.

Pneumatic fans must be installed by special personnel.

The installation and use of pneumatic fans must comply with the relevant provisions of the "Coal Mine Safety Regulations".

The working pressure of the pneumatic fan is 0.45MPa. Cotton braided rubber hose is used to connect the air pressure pipe and the air inlet port of the air motor. A stop valve must be installed between the air pressure pipe outlet and the rubber hose.

 

6 Use, operation

6.1 Preparation and inspection before use

     Before using the pneumatic fan, check whether all parts are complete and whether the connection is correct and firm.

     Slowly open the air valve, observe whether the direction of impeller rotation is consistent with the direction indicated on the casing, and check whether the rotation of the rotating parts is flexible, and whether there are noises, impacts and abnormal sounds. When everything is normal, the fan can operate normally.

     When the air volume of the pneumatic fan is large and sometimes small during operation, it should stop running immediately, check whether there is air leakage in the pipeline or move the impeller by hand to find out whether the motor is faulty, and deal with it.

     If the shell of the pneumatic fan is deformed, it should be dealt with in time. After the treatment, the gap between the blade and the protective ring of the shell should be greater than 2.5mm.

6.2 Instructions for use

     In order to ensure the long-term safe operation of the pneumatic fan, attention should be paid to correct use and regular maintenance.

     The air motor of the air blower should be removed every three months, the bearing should be cleaned and lubricated enough.

     Pneumatic fans should fully inspect all parts every six months, and replace them in time if they are found to be damaged. During disassembly and inspection, prevent dirt from entering the motor or remaining on the impeller of the pneumatic fan.

     When the pneumatic fan is not in use, it should be placed in a ventilated and dry place, protected from moisture, corrosion and other damage, and the air motor inlet and outlet should be covered.

The pneumatic fan is packed in a wooden box, and the whole machine is transported, and technical documents such as a packing list, a certificate of conformity, and an operation and maintenance manual are attached.

 

 

 

7 Fault Analysis and Elimination (See Table 2)                                       

Fault characteristics	cause of issue	Fault Identification and Troubleshooting
There is a sound of metal collision in the pneumatic fan	blade wipe case	Replace blade or casing
	metal entry	Exclude foreign matter
There is a banging sound inside the air motor	Too much lubricating oil or bearing fatigue wear	Reduce lubricant or replace motor gear
Insufficient pressure or air volume	The blower is leaking or the speed of the air motor is not enough	Check for air leaks or check the air motor
Increased vibration, intermittent noise	Pneumatic fans work under unstable conditions	Check the air inlet and outlet conditions of the pneumatic fan
Pneumatic blower aerodynamic difficulty	Air motor gear stuck	Grease or replace air motor

8 Transportation and storage

     Pneumatic fans must go through factory inspection before leaving the factory. After passing the inspection, they will be packaged for shipment.

Generally, it is transported by whole machine, which can be transported by land or water.

10 other

     On the premise that the user abides by the rules of storage, use, installation and transportation, within 6 months, if any damage occurs due to manufacturing quality, the manufacturer is responsible for repairing or replacing it.

The production plant undertakes the repair business of pneumatic fans and the supply of spare parts.

The production plant has face-to-face, correspondence and invited training services for pneumatic fan technology.

According to the special needs of users, the configuration of the pneumatic fan can be changed, and the pneumatic fan can be modified.