CN204024961U - The passive Pneumatic booster device of a kind of underground coal mine - Google Patents

Abstract

The utility model provides a passive pneumatic supercharging device under a coal mine, which belongs to the technical field of pneumatic supercharging. The device includes an air motor, a compressor, an air storage tank and a pneumatic control valve group. The air motor and compressor are respectively connected to the downhole compressed air system, and the air motor, compressor, air storage tank and the underground pneumatic equipment are connected in sequence. The valve group is arranged between the air motor and the compressor. The device uses the underground air pressure system and adopts passive drive to convert the medium-low pressure and high-flow gas in the pipeline into the pressure required by the underground pneumatic equipment. It can completely replace the underground electric equipment, eliminate potential safety hazards, and improve the working efficiency of coal mine pneumatic equipment. , expand the scope of application of pneumatic equipment in coal mines, reduce production costs, ensure safe production in coal mines, and have good economic and social benefits.

Description

A passive pneumatic booster device for underground coal mines

technical field

The utility model relates to an underground passive pneumatic booster in coal mines, which belongs to the technical field of pneumatic booster.

Background technique

With the continuous extension of underground tunnels in coal mines, the pressure of the compressed air pipeline is gradually reduced. Insufficient air pressure causes the work efficiency of underground pneumatic equipment to be greatly reduced, and the reconstruction of the compressed air pipeline needs to invest millions or even tens of millions of funds. Compression equipment will cause underground safety hazards. According to the requirements of the "Notice on the Safety Management of Air Compressors Used in Coal Mine" (Anjian Zongmeizhuang [2011] No. 195), mobile air compressors cannot be placed on the mining face and the same In the roadway of the mining face, the use of pipeline connection will inevitably lead to too long pipeline and excessive pressure loss.

At present, in the field of downhole gas booster devices at home and abroad, active booster devices are basically used, and all of them are small flow (<1.0m3/min), which cannot meet the current booster needs; and passive pneumatic devices Supercharging devices are still blank at home and abroad and need to be developed.

Contents of the invention

The purpose of the utility model is to provide a new passive pneumatic booster device that can improve the working efficiency of mine pneumatic equipment and expand the application range of pneumatic equipment in coal mines, which can replace the traditional underground active booster device.

The utility model adopts the following technical solutions:

A passive pneumatic pressurization device for underground coal mines, including an air motor, a compressor, an air storage tank, and a pneumatic control valve group. Before the gas enters the air motor and compressor, it is filtered by the filter system; the air motor is connected with the compressor, the gas storage tank and the downhole pneumatic equipment in sequence, and the compressor is used to transfer the low-pressure and large-flow gas in the compressed air pipeline Converted to medium pressure and medium flow gas or high pressure and small flow gas; the pneumatic control valve group is set between the air motor and the exhaust pipe of the compressor; the gas storage tank is used to store high pressure gas and is equipped with a pressure release device .

The ^air motor is used to drive the compressor, its working pressure range is 0.3-0.6MPa, and its air consumption is 4.0-5.0m ³ /min; Min gas is converted into gas with pressure ≥ 0.5MPa and flow rate ≥ 1.5m ³ /min.

The structure of the compressor adopts a piston type or a screw type, and its boosting ratio is 1-2 times.

Further, a safety valve is also provided on the gas storage tank.

The passive pneumatic pressurization device for underground coal mines of the utility model utilizes the underground pressure air system and adopts passive drive to convert the medium-low pressure and high-flow gas in the pipeline into the pressure required by the underground pneumatic equipment, which can completely replace the underground electric equipment and eliminates the Potential safety hazards, improve the working efficiency of pneumatic equipment in coal mines, expand the application range of pneumatic equipment in coal mines, reduce production costs, ensure safe production in coal mines, and have good economic and social benefits.

Description of drawings

Fig. 1 is the schematic diagram of the passive pneumatic pressure boosting device of the utility model underground coal mine.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figure 1, the passive pneumatic booster device in the coal mine is mainly composed of an air motor, a compressor, a pneumatic control valve group, an air storage tank and pipeline accessories. Air system connection, air motor, compressor, air storage tank and downhole pneumatic equipment are connected in sequence. The air motor is used to drive the operation of the compressor. Its working pressure is 0.3-0.6 MPa and its air consumption is 4.0-5.0 m ³ / min, able to work normally under the pressure of 0.3 MPa, its output power: ≥7.0 kW. The gas entering the air motor and compressor must be filtered to keep it clean and clean.

The compressor is the core part of the pneumatic booster device. It is the key equipment to convert the low-pressure and high-flow gas into the pressure required by the downhole pneumatic equipment. The structure of the compressor can be piston or screw. The port can withstand 0.3-0.5Mpa, not less than 5.0 m ³ /min flow pressure of gas, shaft power ≥ 5 kW, exhaust temperature ≤ 120 ℃; exhaust volume ≥ 2.2 m3/min; boost ratio 1-2 times .

The pneumatic control valve group is set between the air motor and the compressor. On the one hand, the pneumatic control valve group is used to control the pressure and speed of the air motor, and on the other hand, it is used to control the pressure of the exhaust pipe of the compressor to ensure that the compressor is in the most optimal position. It is in the best working condition, and has functions such as over-temperature and over-pressure protection.

The gas storage tank is used to store a certain high-pressure gas. It is equipped with a pressure release device to keep the gas consumption of the pneumatic equipment stable and ensure the stable and reliable operation of the pneumatic equipment. The gas storage tank is equipped with a safety valve.

The utility model can use the energy of the underground compressed air system to drive the underground pneumatic equipment to work through the pneumatic booster device. The low-pressure and high-flow gas in the road is converted into medium-pressure medium-flow or high-pressure low-flow gas, which meets the working requirements of pneumatic equipment in the underground mining face without external power. According to the law of energy conservation, the energy of the system is shown in the following formula: E ₀ =E ₁ +E ₂ , where: E ₀ =P ₀ V ₀ , pressure energy before pipeline pressurization; E ₁ =P ₁ V ₁ , pneumatic The pressurization device consumes pressure energy; E ₂ =P ₂ V ₂ , the pressure energy after the pipeline is pressurized.

Claims (4)

1. the passive Pneumatic booster device of underground coal mine, comprise pneumatic motor, compressor, gas holder and pneumatic control valve group, it is characterized in that, pneumatic motor is connected with underground pressure air system respectively by air line with compressor, the gas of underground pressure air system before entering pneumatic motor and compressor first after filtration system filter; Described pneumatic motor is connected successively with compressor, gas holder and underground pneumatic equipment, and described compressor is used for converting the low pressure and mass flow gas in air line in middle pressure flow gas or high-pressure low-flow gas; Described pneumatic control valve group is arranged between pneumatic motor and the outlet pipe of compressor; Described gas holder is used for storing pressurized gas, and is provided with pressure releasing means.

2. the passive Pneumatic booster device of a kind of underground coal mine according to claim 1, is characterized in that, described pneumatic motor is used for driving compressor operation, and its range of working pressure is 0.3-0.6MPa, and air consumption is 4.0-5.0m ³/ min; Pressure is 0.3-0.4MPa, flow>=5.0m by described compressor ³the gas of/min converts pressure>=0.5MPa, flow>=1.5m to ³the gas of/min.

3. the passive Pneumatic booster device of a kind of underground coal mine according to claim 2, is characterized in that, the structure of described compressor adopts piston type or screw type, and its pressure ratio is 1-2 times.

4., according to the passive Pneumatic booster device of a kind of underground coal mine one of claims 1 to 3 Suo Shu, it is characterized in that, described gas holder is also provided with safety valve.