CN219034900U - Wind power generation device for coal mine wind shaft - Google Patents

Abstract

The utility model provides a wind power generation device for a coal mine wind shaft, which belongs to the technical field of coal energy conservation and comprises a generator set, a charging controller and a storage battery pack; the generator sets are symmetrically arranged on the left side and the right side of the air opening of the diffusion tower by taking the axis of the mine air shaft ventilator as a symmetrical axis, and each set of generator sets comprises a frame, a mandrel, fan blades and an air generator; the spindles are rotatably arranged on the frame through bearings, and a plurality of fan blades are fixed on each spindle to form a wind wheel; the fan blades are of arc plate-shaped structures, the concave surface stretches into the inner side of the diffusion tower to form a windward surface, the convex surface is positioned on the outer side of the diffusion tower to form a leeward surface, and the bending directions of the fan blades of the generator sets at the two sides of the wind gap of the diffusion tower are opposite; the input end of the wind driven generator is connected with the mandrel, the output end of the wind driven generator is connected with the input end of the charging controller, and the output end of the charging controller is connected with the input end of the storage battery. The device has solved in the prior art in the pit ventilation air methane direct dispersion to the sky, and a large amount of energy is extravagant technical problem.

Description

Coal mine wind shaft wind power generation device

technical field

The utility model belongs to the technical field of coal energy saving, and specifically discloses a coal mine wind shaft wind power generation device.

Background technique

Energy conservation is an eternal subject for my country to achieve the strategic goal of sustainable development. Energy conservation not only saves resources, improves energy utilization, protects the environment, but also promotes technological and economic development.

The ventilation system is the lifeline of mine engineering. It provides a steady stream of fresh air for the underground. The fresh air usually enters from the wellheads of the main and auxiliary shafts and is discharged from the air outlets of the air shaft diffusion tower. The continuous underground exhaust air is accompanied by the entire life cycle of the mine.

According to the "Code for Design of Wind Power Generation", the average wind speed of the wind farm is above 3m/s, the effective wind hours are above 4000 hours, and the annual average effective wind energy power density is 150w/m ² .

Mine air shaft fans work 24 hours a day, 365 days a year, with huge air volume (see Table 1), constant wind speed, average wind speed above 10 meters per second, effective wind hours of 8760 hours, and annual average effective wind energy power density of 600～2025w/m ² (see Table 2), (Since the "Coal Mine Safety Regulations" requires that the maximum wind speed of air shafts and wind tunnels be limited to less than 15m/s, the maximum wind speed is calculated as 15m/s). There are no two levels of start-up wind speed and stop wind speed, which makes the control easier.

Table 1 Statistics of underground ventilation in production mines

Note: 1. Statistical Table 1 is taken from the "Coal Mine Engineering Design Manual";

2. The wind speed at the air outlet is calculated according to 10-15m/s.

Table 2 Wind energy density calculation table

serial number Wind speedv/m/s Wind power P/w Wind energy density E/j/s 1 10 600 600 2 11 798.6 798.6 3 12 1036.8 1036.8 4 13 1318.2 1318.2 5 14 1646.4 1646.4 6 15 2025 2025

Explanation: 1. The formula of wind energy density: E＝0.6×V ³ ;

2. The maximum wind speed of wind shafts and wind tunnels in "Coal Mine Safety Regulations" is 15m/s.

Coal mine air shaft ventilators all adopt a single working system. For the safety of air supply, they are all arranged for one use and one standby. Generally, negative pressure extraction ventilation is used. The ventilator room is built on the ground of the wind shaft industrial site. The diffusion tower of the fan is the The air outlet of the underground mine and the air outlet of the diffusion tower are different in size according to the air volume of the fan. The exhausted underground air discharged from the mine is scattered into the air, and a large amount of energy is wasted.

Utility model content

The utility model provides a coal mine air shaft wind power generation device to solve the technical problem in the prior art that exhausted underground wind is directly scattered into the air and a large amount of wind energy is wasted.

The above-mentioned coal mine air shaft wind power generation device includes a generator set, a charging controller and a battery pack; the generator sets are symmetrically arranged on the left and right sides of the diffuser tower with the axis of the mine air shaft fan as the symmetry axis, and each generator set includes Frame, mandrel, fan blades and wind generator; the mandrel is installed on the frame through bearings, and each mandrel is fixed with multiple blades to form a wind wheel; the fan blades are arc-shaped plate-shaped structures, in order to improve efficiency , to reduce the resistance, the concave surface protruding into the inside of the diffusion tower is the windward side, the convex surface is located outside the diffusion tower is the leeward side, the wind blades of the generator sets on both sides of the diffusion tower tuyere are bent in opposite directions; the input shaft of the wind generator passes through the coupling The shaft device is connected with the mandrel, the electricity generated is connected with the input end of the charging controller through the transmission line, and the output end of the charging controller is connected with the input end of the storage battery pack.

Further, each generator set includes two sets of front and rear fan blades, the front and rear two sets of fan blades use the same mandrel, and the front and rear two sets of fan blades are arranged in a staggered position. The fan blades are made of light aluminum alloy, magnesium alloy, engineering plastics or carbon fiber to reduce the consumption of wind energy.

Furthermore, the front and rear two groups of wind blades are three blades fixed at equal angles, and the front and rear two groups of wind blades constitute a three-head rolling two-stage wind wheel, and the front and rear two groups of wind blades are staggered by 30°.

Further, the wind power generation device for wind shafts in coal mines also includes an inverter connected to the output end of the battery pack.

Furthermore, the charge controller, storage battery pack and inverter of the coal mine wind shaft wind power generation device are all installed in the wind shaft power distribution room outside the safe distance.

Further, the wind generator is an explosion-proof wind generator.

Furthermore, the transmission line of the wind power generator is sent to the power distribution room of the wind shaft through the underground pipe along the column of the frame.

The utility model has the following beneficial effects:

⑴ Make full use of abandoned mine exhaust wind to generate electricity, save energy, have high power generation efficiency, and high cost performance, and solve the technical problem in the prior art that the underground exhaust air is directly scattered into the air and a large amount of energy is wasted;

⑵Coal mine wind shaft wind power generation device has no impact on mine safety and has no impact on the surrounding environment;

(3) Coal mine air shaft wind power generation device is an independent system with simple structure, convenient manufacture and installation, easy to apply in existing and new mines, and easy to realize serialization and modular design and manufacture;

⑷ Cheap price, less investment, and easy implementation are the most economical mine ventilation utilization schemes.

Description of drawings

In order to more clearly illustrate the specific implementation of the utility model or the technical solutions in the prior art, the accompanying drawings that need to be used in the description of the specific implementation or the prior art will be briefly introduced below. Obviously, the following descriptions The accompanying drawings are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

Figure 1 is the layout of the generator set;

Fig. 2 is the view of A-A direction in Fig. 1;

Fig. 3 is the view of B-B direction among Fig. 1;

Fig. 4 is the view of C-C direction in Fig. 1;

Fig. 5 is a connection diagram of the generator set, the charge controller, the battery pack, and the inverter in Fig. 2;

Fig. 6 is a connection diagram of the generator set, the charge controller, the battery pack and the inverter in Fig. 3 .

In the figure: 1-charge controller; 2-battery pack; 3-inverter; 4-frame; 5-mandrel; 6-blade; 7-wind generator; 8-bearing; Electric room; 10-generator set I; 11-generator set II; 12-generator set III; 13-generator set IV; 14-power transmission line;

101-return air shaft shaft; 102-wind tunnel; 103-mine air shaft fan; 103a-working fan; 103b-standby fan; 104-diffusion tower tuyere; 105-wind direction; 107 - Floor.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

The above-mentioned coal mine air shaft wind power generation device includes a generator set, a charge controller 1 , a battery pack 2 , and an inverter 3 .

The generator sets are symmetrically arranged on the left and right sides of the diffuser tower tuyere 104 with the axis of the mine shaft ventilator 103 as the axis of symmetry. 5 is installed on the frame 4 through the rotation of the bearing 8, and each mandrel 5 is fixed with a plurality of fan blades 6 to form a wind wheel; the fan blades 6 are arc-shaped plate-shaped structures, and the concave surface extending into the inside of the diffusion tower is the windward side , the aerodynamic moment is generated on the fan blade 6, so that the fan blade 6 obtains a steady stream of rotational power, and the convex surface is located on the outside of the diffusion tower as the leeward side to reduce wind resistance; the fan blades 6 of the generator set on both sides of the diffuser tower tuyere The bending direction is opposite; when the fan blade 6 is installed, use the anemometer to select the appropriate installation height of the fan blade 6, and the installation of the fan blade 6 will not affect the air flow pressure of the diffusion tower tuyere 104; the input end of the wind power generator 7 is connected to the mandrel 5 , the output end is connected to the input end of the charge controller 1 , the output end of the charge controller 1 is connected to the input end of the storage battery pack 2 , and the output end of the storage battery pack 2 is connected to the inverter 3 .

Further, each generator set includes two sets of front and rear fan blades 6, the mandrels 5 of the front and rear two groups of fan blades 6 are connected to form one or the same mandrel, and the front and rear two groups of fan blades 6 are arranged in a misplaced position to reduce the wind load frequency changes. The fan blade 6 is made of light aluminum alloy, magnesium alloy, engineering plastic or carbon fiber to reduce the consumption of wind energy.

Furthermore, the front and rear sets of wind blades 6 are three blades 6 fixed at equal angles, and the front and rear sets of wind blades 6 constitute a three-head rolling two-stage wind wheel, and the front and rear sets of wind blades 6 are staggered by 30°.

Furthermore, the charge controller 1 , the storage battery pack 2 and the inverter 3 of the coal mine wind shaft wind power generation device are all installed in the wind shaft power distribution room 9 .

Further, the wind power generator 7 is an explosion-proof wind power generator.

Further, the power transmission line 14 of the wind power generator 7 is sent to the power distribution room 9 of the wind shaft through the underground pipe along the column of the frame 4 .

The coal mine wind shaft wind power generation device is built on the industrial site of the coal mine wind shaft, with convenient transportation and good grid connection conditions. The electricity generated is firstly used for the daily use of wind wells, and the rich electricity is connected to the grid, which is a very good green energy-saving project.

The entire power generation device is an independent system, and the design, manufacture, installation and cost are all very simple, and will not affect the safe production of the existing air shaft system, nor will it affect the environment around the air shaft.

Coal mine wind shaft wind power generation device These conditions are not available in the Gobi Desert, barren mountains, coastal wind farms and other wind sites (see Table 3).

Table 3 Analysis table of wind power generation

project name natural wind field Wind shaft wind power generation device wind energy resources random, intermittent, fluctuating continuous, stable Average wind speed m/s >3 10～15 Annual effective wind hours/h 4000 8760 <![CDATA[Annual average effective wind power density w/m²]]> 150 600～2025 Fan installation height/m 60～70m or more 5～6m Traffic Conditions inconvenient convenient Grid connection conditions better good construction conditions difficulty good investment conditions very high lower

Conclusions: 1. Wind energy resources are a necessary condition for wind power generation, and coal mine wind shaft wind power generation devices have the best wind energy resources;

2. It can be seen from Table 3 that the wind power generation device of coal mine wind shaft has very superior construction conditions and necessity.

Through investigation and research on the versatility and practicability of coal mine wind power generation devices, its power generation conditions are better than those of solar power generation facilities, and better than the power generation conditions of wind farms such as Gobi Desert, barren mountains and coastal wind farms. Compared with the investment of the above generator sets The cost is much less.

Statistics and comparisons have been made on the underground ventilation volume of existing mines, and statistics and analysis on the wind speed of underground ventilation, and a lot of basic work has been done for the application of wind power generation devices in coal mines.

The overall layout, type selection and complete set have been designed (see Table 4);

Table 4 list of wind shaft wind power generation equipment equipment

serial number name Quantity/set, each Material Remark 1 Three-head rolling double-stage wind wheel 4 groups aluminum alloy or magnesium alloy, engineering plastics, carbon fiber 2 Explosion-proof wind turbine 4 Purchased parts 3 frame 4 steel structure Purchased parts 4 charge controller 1 Purchased parts 5 Battery pack Group 1 Purchased parts 6 inverter 1 7 electric wire m Purchased parts

Description: The equipment is configured according to one return air shaft shaft 101 and two sets of mine air shaft ventilators 103 (working fan 103a and standby fan 103b).

The cost of the coal mine wind shaft wind power generation device is preliminarily estimated (see Table 5).

Table 5 List of generator set components

serial number Part Name quantity Material 1 blade 6 aluminum alloy 2 mandrel 1 aluminum alloy 3 bearing 3 Purchased parts 4 Coupling 1 Purchased parts 5 Explosion-proof wind turbine 1 Purchased parts 6 frame 1 steel structure 7 Anchor bolts (for fixing the rack) 6 Purchased parts 8 Anchor nut 6 Purchased parts

Explanation: ① The materials given in the table are the materials of a generator set, and the whole system has four sets;

② It can be seen from the table that the structure of the coal mine wind shaft wind power generation device is very simple, and the cost performance is very high.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand : It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements to some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions depart from the various embodiments of the present invention Scope of technical solutions.

Claims (7)

1. A coal mine wind shaft wind power generating device is characterized in that, comprises generator set, charging controller and storage battery pack; The generator sets are symmetrically arranged on both sides of the diffusion tower tuyere with the axis of the mine shaft fan as the symmetry axis, and each generator set includes a frame, a mandrel, wind blades and a wind generator; The mandrels are rotatably mounted on the frame, and each mandrel is fixed with a plurality of blades to form a wind wheel; The fan blade is an arc-shaped plate structure, the concave surface extending into the inside of the diffusion tower is the windward side, the convex surface is located outside the diffusion tower is the leeward side, and the blades of the generator sets on both sides of the diffusion tower tuyere have opposite bending directions; The input end of the wind power generator is connected with the mandrel, the output end is connected with the input end of the charge controller, and the output end of the charge controller is connected with the input end of the battery pack. 2. The coal mine wind shaft wind power generation device according to claim 1, wherein each group of generating sets includes two groups of wind blades before and after, the mandrels of the two groups of wind blades before and after are connected or are the same mandrel, and The two sets of wind blades are misplaced. 3. The coal mine wind shaft wind power generation device according to claim 2, characterized in that, the front and rear two groups of wind blades are three blades fixed at equal angles, and the front and rear two groups of wind blades constitute a three-head rolling two-stage wind wheel , the front and rear two groups of fan blades are staggered by 30°. 4. The coal mine air shaft wind power generation device according to claim 3, further comprising an inverter connected to the output end of the battery pack. 5. The coal mine wind shaft wind power generation device according to claim 4, characterized in that, the charge controller, battery pack and inverter are all installed in the wind shaft power distribution room. 6. The coal mine wind shaft wind power generation device according to claim 5, characterized in that the wind power generator is an explosion-proof wind power generator. 7. The coal mine wind shaft wind power generation device according to claim 5 or 6, characterized in that, the transmission line of the wind power generator is sent to the power distribution room of the wind shaft through the underground pipe along the column of the frame.

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