A mine coal shed safety ventilation device

Abstract

The present application relates to a kind of mine coal shed safety ventilation device, including ventilation cylinder, air cylinder, dust collection pipe, the ventilation cylinder is provided with ventilation machine case, the ventilation machine case is sequentially provided with suction shaft, pressurized rotating drum, driving shaft from left to right, suction shaft, pressurized rotating drum, driving shaft is connected head to tail, first suction fan is installed on suction shaft, pressurized rotating drum is evenly distributed with multiple movable turbine blades, ventilation cylinder left side is provided with dust collection pipe and transition pipe;The first exhaust pipe on multiple ventilation cylinders of the present application, outside air is evenly discharged into coal shed;Anode panel and cathode panel are arranged in ventilation cylinder, under the action of electric field force between anode panel and cathode panel, dust suspended in air is separated, and a small amount of air carrying suspended dust is filtered from the air that escapes from the edge of collection ring pipe, reduce the hindrance of filter screen to ventilation airflow when filtering suspended dust, improve ventilation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mining, and in particular relates to a safety ventilation device for a coal shed used in a mine. Background Art

[0002] A coal shed is a large warehouse for storing coal. The structure of a coal shed requires a large span and high clearance to meet the storage and working space requirements. Generally speaking, the main function of the coal shed structure is to cover the coal yard to prevent the coal from being wetted by rain and polluting the environment by wind, and to prevent the coal from getting damp and deteriorating. It is an energy-saving and environmentally friendly project.

[0003] During the storage process in the coal shed, due to the limited space of the coal shed, dust and other solid particles are easily floating in the coal shed, which can easily cause dust explosions, ignite coal mines, and cause safety accidents. Ventilation devices are installed in the coal shed to maintain the air quality in the coal shed and avoid the accumulation of harmful gases in the coal shed. However, conventional ventilation devices cannot reduce floating dust and other solid particles when directly passing external air into the coal shed. On this basis, technicians have improved the ventilation devices and added filters to the ventilation devices to reduce the dust in the coal shed. However, since the filters are easily clogged under harsh conditions, they need to be replaced or cleaned frequently. In addition, traditional ventilation devices will increase the content of floating dust and other solid particles due to the influence of airflow, and may even increase the risk of local dust explosions. Therefore, in order to reduce the risk of dust explosions and reduce dust accumulation and clogging of filter devices, it is very necessary to improve the existing ventilation devices and perform safe ventilation. Summary of the Invention

[0004] In view of this, an object of the present invention is to provide a safety ventilation device for a coal shed used in a mine to solve the above-mentioned problem.

[0005] The vent pipe is connected to the air vent of the air vent by the flange at the left and right ends of the vent pipe, and the vent pipe is connected to the air vent of the air vent by the flange at the right ends of the vent pipe.

[0006] The ventilation casing is provided with an intake shaft, a compression rotor, and a driving shaft in sequence from left to right. The intake shaft, the compression rotor, and the driving shaft are connected end to end. A limiting ring is rotatably sleeved on the intake shaft. A first support rod is evenly distributed between the limiting ring and the ventilation casing. One end of the first support rod is fixedly connected to the limiting ring, and the other end of the first support rod is fixedly connected to the inner wall of the ventilation casing. A first intake fan is installed on the intake shaft. Multiple rows of movable turbine blades are evenly distributed on the compression rotor. A row of fixed turbine blades is provided between two adjacent rows of movable turbine blades, and the fixed turbine blades are fixedly connected to the inner wall of the ventilation casing. Then, a filter element is sleeved on the driving shaft, a positioning drum is provided in the middle of the filter element, and the positioning drum in the filter element is rotatably connected to the driving shaft, the right end of the driving shaft passes through the ventilation casing, and a second suction fan is provided at the right end of the ventilation casing, the second suction fan is fixedly connected to the driving shaft, a driving motor is provided on the right side of the second suction fan, the output shaft of the driving motor is fixedly connected to the driving shaft, a mounting seat is fixed on the driving motor, and a plurality of second support rods are evenly distributed between the mounting seat and the ventilation cylinder, one end of the second support rod is fixedly connected to the mounting seat, and the other end of the second support rod is fixedly connected to the side wall of the ventilation cylinder.

[0007] Preferably, a row of intake pipes are evenly distributed on the left end of the ventilation casing, one end of the intake pipe is connected to the ventilation casing, and the other end of the intake pipe passes through the side wall of the ventilation cylinder, and a row of second exhaust pipes are evenly distributed on the right end of the ventilation casing, one end of the second exhaust pipe is connected to the ventilation casing, and the other end of the second exhaust pipe passes through the side wall of the ventilation cylinder.

[0008] Preferably, the positioning plate is evenly distributed with through holes to facilitate airflow.

[0009] An anode panel and a cathode panel are provided in the ventilation cylinder between the gas collecting ring pipe and the second exhaust pipe, and the anode panel and the cathode panel are both circular and concentrically distributed, wherein the anode panel is fixedly connected to the inner wall of the ventilation cylinder, and the cathode panel is fixedly connected to the outer wall of the ventilation casing. A dust collection pipe and a transition pipe are provided on the left side of the ventilation cylinder, wherein the right end of the transition pipe is connected to the left end of the ventilation cylinder, and the transition pipe and the dust collection pipe are connected through a filter screen. The left end of the dust collection pipe is covered with an end cover, and a dust collection box is provided in the dust collection pipe with a sliding connection, the dust collection box is opened on the right side, and a telescopic rod is provided between the dust collection box and the end cover. The bottom end of the telescopic rod is fixedly connected to the end cover, the telescopic end of the telescopic rod is fixedly connected to the middle of the left side of the dust collecting box, a cleaning ring tube is slidably connected in the transition tube, and four connecting rods are evenly distributed between the cleaning ring tube and the dust collecting box, one end of the connecting rod is fixedly connected to the inner wall of the dust collecting box, and the other end of the connecting rod is fixedly connected to the inner wall of the cleaning ring tube. A push-pull rod is provided on the right side of the dust collecting box, one end of the push-pull rod is fixedly connected to the dust collecting box, and the other end of the push-pull rod is fixed with a plug. A contraction portion with a smaller left end and a larger right end is provided near the right end of the transition tube, and the plug is located on the right side of the contraction portion, and the cross-sectional diameter of the plug is equal to the cross-sectional diameter of the left port of the contraction portion.

[0010] Preferably, the inner wall diameter of the anode panel is larger than the outer edge diameter of the right opening of the gas collecting ring pipe, and the inner wall diameter of the cathode panel is smaller than the inner edge diameter of the right opening of the gas collecting ring pipe.

[0011] Preferably, four support rods are evenly distributed on the outside of the filter screen, one end of the support rod is fixedly connected to the dust collection pipe, and the other end of the support rod is fixedly connected to the transition pipe.

[0012] Preferably, a discharge port is provided on the lower side of the dust collection box, and a discharge pipe is provided on the lower side of the dust collection pipe, and the discharge pipe is located on the left side of the discharge port.

[0013] The beneficial effects of the present invention are as follows: the present invention utilizes a driving motor to drive the rotation of the suction shaft, the compression drum, and the driving shaft, and then drives the first suction fan, the movable turbine blades, and the second suction fan to rotate. When the second suction fan rotates, part of the air from the outside that enters from the right end port of the ventilation cylinder is discharged through the first exhaust pipe, and the other part continues to move to the left, enters the next ventilation cylinder through the ventilation cylinder, and is discharged from the corresponding first exhaust pipe. Finally, the outside air is evenly discharged into the coal shed through the first exhaust pipes on multiple ventilation cylinders, thereby realizing ventilation in the coal shed; when the first suction fan rotates, the air in the coal shed is sucked into the ventilation casing through the intake pipe, and is pressurized to form a high-pressure airflow by utilizing the cooperation of multiple rows of movable turbine blades and fixed turbine blades. The pressurized gas forms a pressure difference with the outside air, and Under the action of pressure difference, gas passes through the filter element, filters the dust and other solid particles floating in the coal shed, and the filtered air is re-discharged into the coal shed through the second exhaust pipe; it not only realizes the ventilation of the coal shed, but also reduces the dust and other solid particles floating in the coal shed through filtration by the filter element, reducing the risk of dust explosion; an anode panel and a cathode panel are arranged in the ventilation cylinder, and a dust collection pipe is arranged on the left side of the ventilation cylinder, and the electric field generated by the anode panel and the cathode panel is used to separate the dust suspended in the air under the action of the electric field force and collect it into the dust collection box; that is, the ventilation airflow first uses the electric field to separate the suspended dust, and a small amount of air carrying the suspended dust is filtered from the air escaping from the edge of the gas collecting ring pipe, reducing the obstruction of the filter screen to the ventilation airflow when filtering the suspended dust. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 For the external structure of the ventilation device Figure 1 ;

[0015] Figure 2 Internal structure of the ventilator Figure 1 ;

[0016] Figure 3 For the external structure of the ventilation device Figure 2 ;

[0017] Figure 4 Internal structure of the ventilation cylinder Figure 2 ;

[0018] Figure 5 This is the structure diagram of the dust collection box.

[0019] Numbers in the figure: 1 ventilation cylinder; 2 ventilation cylinder; 3 ventilation casing; 4 positioning plate; 5 first exhaust pipe; 501 air collecting ring pipe; 6 suction shaft; 7 compression cylinder; 8 driving shaft; 9 limiting ring; 10 first support rod; 11 first suction fan; 12 movable turbine blades; 13 fixed turbine blades; 14 filter element; 15 second suction fan; 16 intake pipe; 17 second exhaust pipe; 18 driving motor; 19 mounting seat; 20 second support rod; 21 dust collection pipe; 2101 discharge pipe; 22 anode panel; 23 cathode panel; 24 transition pipe; 2401 contraction part; 25 filter screen; 26 support rod; 27 end cover; 28 dust collection box; 2801 discharge port; 29 telescopic rod; 30 cleaning ring pipe; 31 connecting rod; 32 push-pull rod; 33 plug. DETAILED DESCRIPTION

[0020] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0021] Example 1: Figure 1-2 As shown, a mine coal shed safety ventilation device includes a ventilation cylinder 1 and a ventilation cylinder 2. Flanges are provided at the left and right ends of the ventilation cylinder 1 and the ventilation cylinder 2. The flanges are used to connect the ventilation cylinder 1 and the ventilation cylinder 2 end to end. A ventilation casing 3 is provided in the ventilation cylinder 1. The ventilation casing 3 is a cylindrical structure composed of two semi-cylindrical structures spliced ​​and fixed by bolts. Positioning plates 4 are provided at both ends of the ventilation casing 3. The inner edge of the positioning plate 4 is fixedly connected to the ventilation casing 3 by bolts, and the outer edge of the positioning plate 4 is fixed to the ventilation cylinder by bolts. 1 is fixedly connected to the inner wall of the two positioning plates 4, and a row of first exhaust pipes 5 are evenly distributed in an annular manner between the two positioning plates 4. The first exhaust pipes 5 pass through the side wall of the ventilation cylinder 1, and the first exhaust pipes 5 are inserted into the port at one end on the inner side of the ventilation cylinder 1 horizontally to the right, and the first exhaust pipes 5 pass through the port at one end on the outer side of the ventilation cylinder 1 vertically outward. A circular air collecting ring pipe 501 is provided in the ventilation cylinder 1, and the left side of the air collecting ring pipe 501 is connected to the first exhaust pipe 5. A diffusion-shaped opening is provided on the right side of the air collecting ring pipe 501 to facilitate the air in the ventilation cylinder 1 to enter the first exhaust pipe 5.

[0022] In this embodiment, the ventilation casing 3 is provided with an intake shaft 6, a compression drum 7, and a drive shaft 8 from left to right. The intake shaft 6, the compression drum 7, and the drive shaft 8 are connected end to end. A limiting ring 9 is rotatably sleeved on the intake shaft 6. A first support rod 10 is evenly distributed between the limiting ring 9 and the ventilation casing 3. One end of the first support rod 10 is fixedly connected to the limiting ring 9, and the other end of the first support rod 10 is fixedly connected to the inner wall of the ventilation casing 3. A first intake fan 11 is installed on the intake shaft 6, and multiple rows of movable turbine blades 12 are evenly distributed on the compression drum 7. A row of fixed turbine blades 13 is provided between two adjacent rows of movable turbine blades 12, and the fixed turbine blades 13 are fixedly connected to the inner wall of the ventilation casing 3. Then, a filter element 14 is sleeved on the driving shaft 8, a positioning drum is provided in the middle of the filter element 14, and the positioning drum in the filter element 14 is rotatably connected to the driving shaft 8, the right end of the driving shaft 8 passes through the ventilation casing 3, and a second suction fan 15 is provided at the right end of the ventilation casing 3, the second suction fan 15 is fixedly connected to the driving shaft 8, and a driving motor 18 is provided on the right side of the second suction fan 15, and the output shaft of the driving motor 18 is fixedly connected to the driving shaft 8, and a mounting seat 19 is fixed on the driving motor 18, and a plurality of second support rods 20 are evenly distributed between the mounting seat 19 and the ventilation cylinder 1, one end of the second support rod 20 is fixedly connected to the mounting seat 19, and the other end of the second support rod 20 is fixedly connected to the side wall of the ventilation cylinder 1.

[0023] In this embodiment, a row of intake pipes 16 are evenly distributed on the left end of the ventilation casing 3, one end of the intake pipe 16 is connected to the ventilation casing 3, and the other end of the intake pipe 16 passes through the side wall of the ventilation cylinder 1, and a row of second exhaust pipes 17 are evenly distributed on the right end of the ventilation casing 3, one end of the second exhaust pipe 17 is connected to the ventilation casing 3, and the other end of the second exhaust pipe 17 passes through the side wall of the ventilation cylinder 1.

[0024] In this embodiment, through holes are evenly distributed on the positioning plate 4 to facilitate airflow.

[0025] In this embodiment, when the coal shed is ventilated using the present safety ventilation device, the ventilation cylinder 1 and the ventilation cylinder 2 are sequentially installed in the coal shed, and the ventilation cylinder 2 is connected to the outside, and the driving motor 18 is turned on. The driving motor 18 drives the suction shaft 6, the air compression cylinder, and the driving shaft 8 to rotate, thereby driving the first suction fan 11, the movable turbine blades 12, and the second suction fan 15 to rotate. During the rotation of the second suction fan 15, the outside world enters from the ventilation cylinder 2 and the right end port of the ventilation cylinder 1 in turn. Part of the air enters the first exhaust pipe 5 from the air collecting ring pipe 5 and is discharged, and the other part continues to move to the left, enters the next ventilation cylinder 1 through the ventilation cylinder 2, and is discharged from the corresponding first exhaust pipe 5. Finally, the outside air is evenly discharged into the coal shed through the first exhaust pipe 5 on multiple ventilation cylinders 1, thereby realizing ventilation in the coal shed. The first suction fan 11 rotates, and the air in the coal shed is sucked into the ventilation case 3 through the air intake pipe 16. The air is then pressurized to form a high-pressure airflow by means of the cooperation of multiple rows of movable turbine blades 12 and fixed turbine blades 13. The pressurized gas forms a pressure difference with the outside air. Under the action of the pressure difference, the gas passes through the filter element 14 to filter the dust and other solid particles floating in the coal shed. The filtered air is re-discharged into the coal shed through the second exhaust pipe 17; that is, on the one hand, the outside air is drawn into the ventilation cylinder 1 and discharged into the coal shed from the first exhaust pipe 5 to realize ventilation in the coal shed. On the other hand, in the ventilation process, the working principle of the turbo compressor is utilized, and under the cooperation of the movable turbine blades 12 and the fixed turbine blades 13, the air in the coal shed is pressurized to form a high-pressure airflow, which is filtered through the filter element 14 and re-discharged into the coal shed. Not only ventilation of the coal shed is realized, but also dust and other solid particles floating in the coal shed are reduced by filtering through the filter element 14, thereby reducing the risk of dust explosion.

[0026] Example 2: Figure 3-4As shown, the difference between this embodiment and the first embodiment is that: the ventilation cylinder 1 is arranged in the coal shed, the right end of the drive shaft 8 passes through the ventilation casing 3, and the right end of the ventilation casing 3 is provided with a second suction fan 15, the second suction fan 15 is fixedly connected to the drive shaft 8, and a drive motor 18 is provided on the right side of the second suction fan 15, and the output shaft of the drive motor 18 is fixedly connected to the drive shaft 8. An anode panel 22 and a cathode panel 23 are provided between the gas collecting ring pipe 501 and the second exhaust pipe 17 in the ventilation cylinder 1, and the anode panel 22 and the cathode panel 23 are both circular and concentrically distributed, wherein the anode panel 22 is fixedly connected to the inner wall of the ventilation cylinder 1, and the cathode panel 23 is fixedly connected to the outer wall of the ventilation casing 3, and a dust collection pipe 21 and a transition pipe 24 are provided on the left side of the ventilation cylinder 1, wherein the right end of the transition pipe 24 is connected to the left end of the ventilation cylinder 1, and the transition pipe 24 is connected to the dust collection pipe 21 through a filter screen 25, and the left end of the dust collection pipe 21 is covered with an end cap 2 7. A dust collecting box 28 is provided in the dust collecting pipe 21 for sliding connection. The right side of the dust collecting box 28 is opened, and a telescopic rod 29 is provided between the dust collecting box 28 and the end cover 27. The bottom end of the telescopic rod 29 is fixedly connected to the end cover 27, and the telescopic end of the telescopic rod 29 is fixedly connected to the middle part of the left side of the dust collecting box 28. A cleaning ring pipe 30 is slidably connected in the transition pipe 24. Four connecting rods 31 are evenly distributed between the cleaning ring pipe 30 and the dust collecting box 28. One end of the connecting rod 31 is fixed to the dust collecting box 28. The inner wall of the collecting box 28 is fixedly connected, and the other end of the connecting rod 31 is fixedly connected to the inner wall of the cleaning ring tube 30. A push-pull rod 32 is provided on the right side of the dust collecting box 28. One end of the push-pull rod 32 is fixedly connected to the dust collecting box 28, and the other end of the push-pull rod 32 is fixed with a plug 33. The transition pipe 24 is provided with a contraction portion 2401 with a small left end and a large right end near the right end. The plug 33 is located on the right side of the contraction portion 2401, and the cross-sectional diameter of the plug 33 is equal to the cross-sectional diameter of the left port of the contraction portion 2401.

[0027] In this embodiment, the inner diameter of the anode panel 22 is larger than the outer edge diameter of the right opening of the gas collecting ring pipe 501 , and the inner diameter of the cathode panel 23 is smaller than the inner edge diameter of the right opening of the gas collecting ring pipe 501 .

[0028] In this embodiment, four support rods 26 are evenly distributed outside the filter screen 25 , one end of the support rod 26 is fixedly connected to the dust collection pipe 21 , and the other end of the support rod 26 is fixedly connected to the transition pipe 24 .

[0029] In this embodiment, a discharge port 2801 is provided at the lower side of the dust collection box 28 , and a discharge pipe 2101 is provided at the lower side of the dust collection pipe 21 , and the discharge pipe 2101 is located on the left side of the discharge port 2801 .

[0030] In this embodiment, when the drive motor 18 is turned on, the air entering the coal shed from the right end port of the ventilation cylinder 1 passes between the anode panel 22 and the cathode panel 23, and the anode panel 22 and the cathode panel 23 are connected to the power supply and energized, and an electric field is generated between the anode panel 22 and the cathode panel 23. As the dust particles suspended in the gas collide with each other during Brownian motion and gain or lose electrons, they become positively charged after losing electrons or negatively charged after gaining electrons. Under the action of the electric field force, the suspended dust moves closer to the anode panel 22 and the cathode panel 23, respectively, so that as the air flows, the dust particles move further away from the anode panel 22 and the cathode panel 23. The lower the content of suspended dust in the air on the side wall of 23, the lower the content of suspended dust in the air on the side wall closer to the anode panel 22 and the cathode panel 23. On the contrary, the higher the content of suspended dust in the air on the side wall closer to the anode panel 22 and the cathode panel 23, the suspended dust is separated from the middle area of ​​the anode panel 22 and the cathode panel 23. The air separated by the electric field force enters the gas collecting ring pipe 501 and is then discharged from the first exhaust pipe 5; that is, the driving motor 18 drives the second air intake fan 15 to rotate to accelerate the air flow in the coal shed. At the same time, when the air flow formed in the air exchange cylinder 1 passes through the electric field formed between the anode panel 22 and the cathode panel 23, the suspended dust is separated from the anode panel 22 and the cathode panel 23 under the action of the electric field force. A small amount of air that escapes between the side edge of the pole plate 22 and the gas collecting ring pipe 501, and between the side edge of the cathode plate 23 and the gas collecting ring pipe 501, carries the separated dust particles and is discharged from the first exhaust pipe 5 after separation. The air containing suspended dust passes through the edge of the gas collecting ring pipe 501 and passes through the contraction portion 2401 of the transition pipe 24. Finally, the suspended dust is filtered by the filter screen 25. The excess air is discharged from the filter screen 25, and the suspended dust in the air is collected in the dust collection box 28. Then, by retracting the telescopic rod 29, the dust collection box 28 is driven to slide, and the cleaning ring pipe 30 moves the filter screen 2 5, the dust particles remaining on the filter screen 25 are scraped off to clean the filter screen 25, the discharge port 2801 is connected to the discharge pipe 2101, and under the driving action of the push-pull rod 32, the plug 33 blocks the contraction part 2401 to prevent the airflow generated in the ventilation cylinder 1 from blowing to the dust collection box 28, and then falls again from the discharge pipe 2101 to the coal mine in the coal shed under the action of gravity; the electric field force is used to separate the air and the suspended dust, and the filter screen 25 only filters the small amount of air that escapes into the transition pipe 24 and contains suspended dust, so as to avoid the filter screen 25 hindering the ventilation work of the first exhaust pipe 5 when filtering the suspended dust.

[0031] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A safety ventilation device for a coal shed in a mine, comprising a ventilation cylinder, a ventilator, a dust collection pipe, and a transition pipe. An anode panel and a cathode panel are disposed in the ventilation cylinder between the gas collecting ring pipe and the second exhaust pipe. The anode panel and the cathode panel are both annular and concentrically arranged. The anode panel is fixedly connected to the inner wall of the ventilation cylinder, and the cathode panel is fixedly connected to the outer wall of the ventilation casing. The device is characterized by: The air exchange cylinder is provided with a ventilation casing, and the ventilation casing is a cylindrical structure composed of two semi-cylindrical structures spliced ​​and fixed by bolts. Positioning plates are provided on the left and right ends of the ventilation casing, the inner edges of the positioning plates are fixedly connected to the ventilation casing by bolts, and the outer edges of the positioning plates are fixedly connected to the inner wall of the ventilation cylinder by bolts. A row of first exhaust pipes is evenly distributed in a ring between the two positioning plates, and the first exhaust pipe passes through the side wall of the ventilation cylinder, and the first exhaust pipe is inserted into the port at one end inside the ventilation cylinder horizontally to the right, and the first exhaust pipe passes through the port at one end outside the ventilation cylinder vertically outward, and a circular air collecting ring pipe is provided in the ventilation cylinder, and the left side of the air collecting ring pipe is connected to the first exhaust pipe, and a diffusion-shaped opening is provided on the right side of the air collecting ring pipe to facilitate the air in the ventilation cylinder to enter the first exhaust pipe; the inner wall diameter of the anode panel is larger than the outer edge diameter of the right side opening of the air collecting ring pipe, and the inner wall diameter of the cathode panel is smaller than the inner edge diameter of the right side opening of the air collecting ring pipe; The ventilation casing is provided with an intake shaft, a compression rotor, and a driving shaft from left to right in sequence. The intake shaft, the compression rotor, and the driving shaft are connected end to end. A limiting ring is rotatably sleeved on the intake shaft. A first support rod is evenly distributed between the limiting ring and the ventilation casing. One end of the first support rod is fixedly connected to the limiting ring, and the other end of the first support rod is fixedly connected to the inner wall of the ventilation casing. A first intake fan is installed on the intake shaft, and multiple rows of movable turbine blades are evenly distributed on the compression rotor. A row of fixed turbine blades is provided between two adjacent rows of movable turbine blades, and the fixed turbine blades are fixedly connected to the inner wall of the ventilation casing. A filter element is sleeved on the driving shaft, and a positioning rotor is provided in the middle of the filter element. The positioning rotor in the filter element is rotatably connected to the driving shaft. The driving shaft The right end passes through the ventilation casing, and a second suction fan is provided at the right end of the ventilation casing, and the second suction fan is fixedly connected to the driving shaft. A driving motor is provided on the right side of the second suction fan, and the output shaft of the driving motor is fixedly connected to the driving shaft. A mounting seat is fixed on the driving motor, and a plurality of second support rods are evenly distributed between the mounting seat and the ventilation cylinder, one end of the second support rod is fixedly connected to the mounting seat, and the other end of the second support rod is fixedly connected to the side wall of the ventilation cylinder; a row of intake pipes is evenly distributed on the left end of the ventilation casing, one end of the intake pipe is connected to the ventilation casing, and the other end of the intake pipe passes through the side wall of the ventilation cylinder, and a row of second exhaust pipes is evenly distributed on the right end of the ventilation casing, one end of the second exhaust pipe is connected to the ventilation casing, and the other end of the second exhaust pipe passes through the side wall of the ventilation cylinder.

2. A mine coal shed safety ventilation device according to claim 1, characterized in that: The left side of the air cylinder is provided with a dust collection pipe and a transition pipe, wherein the right end of the transition pipe is connected to the left end of the air cylinder, and the transition pipe and the dust collection pipe are connected through the filter screen. The left end of the dust collection pipe is covered with an end cover, and a dust collection box is slidingly connected inside the dust collection pipe. The dust collection box has an opening on the right side, and a telescopic rod is provided between the dust collection box and the end cover, the bottom end of the telescopic rod is fixedly connected to the end cover, and the telescopic end of the telescopic rod is fixedly connected to the middle of the left side of the dust collection box. A cleaning ring pipe is slidingly connected in the transition pipe, and four connecting rods are evenly distributed between the cleaning ring pipe and the dust collection box. One end of the connecting rod is fixedly connected to the inner wall of the dust collection box, and the other end of the connecting rod is fixedly connected to the inner wall of the cleaning ring pipe. A push-pull rod is provided on the right side of the dust collection box, one end of the push-pull rod is fixedly connected to the dust collection box, and the other end of the push-pull rod is fixed with a plug. The transition pipe is provided with a contraction portion with a smaller left end and a larger right end near the right end, and the plug is located on the right side of the contraction portion, and the cross-sectional diameter of the plug is equal to the cross-sectional diameter of the left port of the contraction portion.

3. A mine coal shed safety ventilation device according to claim 1, characterized in that: The positioning plate is evenly distributed with through holes to facilitate airflow.

4. A mine coal shed safety ventilation device according to claim 2, characterized in that: Four support rods are evenly distributed on the outside of the filter screen, one end of the support rod is fixedly connected to the dust collection pipe, and the other end of the support rod is fixedly connected to the transition pipe.

5. A mine coal shed safety ventilation device according to claim 2, characterized in that: A discharge port is provided at the lower side of the dust collection box, and a discharge pipe is provided at the lower side of the dust collection pipe, and the discharge pipe is located on the left side of the discharge port.

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