Air inducing cover for coal mine ventilation equipment

Abstract

The invention discloses an air inducing cover for coal mine ventilation equipment, and relates to the field of coal mine equipment, the air inducing cover comprises an air inducing cover mechanism, the bottom of the air inducing cover mechanism is provided with a transverse air inducing mechanism, the outer side of the transverse air inducing mechanism is provided with a vertical air inducing mechanism, and the bottom of the vertical air inducing mechanism is provided with a base; u-shaped supporting seats are fixedly mounted at the bottom of the base, three groups of supporting seats are uniformly arranged at the bottom of the base, a negative pressure pipe is arranged on the air inducing cover mechanism, a supporting plate is fixedly arranged at the bottom of the negative pressure pipe, a driving arm is mounted at the bottom of the supporting plate, a supporting block is arranged at the bottom of the driving arm, and an air inducing pipe is fixedly arranged at the end part of the negative pressure pipe. According to the air inducing cover for the coal mine ventilation equipment, the gas concentration can be continuously controlled to be below a safety threshold value through full-coverage ventilation, and the situation that local accumulation reaches the explosion limit is avoided; the synchronous motion design further reduces the risk by shortening the existence time of a high-concentration region; space coverage is comprehensive, and the ventilation dead angle range is reduced.

Description

Technical Field

[0001] The present invention relates to the field of coal mine equipment, in particular to an induced draft hood for coal mine ventilation equipment. Background Art

[0002] Mine ventilation refers to the process of introducing fresh air into the mine to increase the oxygen concentration, dilute and remove toxic and harmful gases and dust in the mine, and send enough fresh air into the mine to ensure the breathing of personnel, blow away and dilute the harmful gases and dust in the mine, and discharge the polluted air to the ground to ensure the health and safety of personnel, adjust the temperature and humidity of the mine, and create more comfortable working conditions. Ventilation equipment is often needed in coal mining. In order to improve ventilation efficiency, an induced draft hood is usually installed at the exhaust port. The existing technology of the coal mine ventilation equipment special induced draft hood has a relatively simple structure and mostly adopts an integrated structure. When the harmful gases at different angles are to be discharged by induced draft, it cannot be adjusted according to the wind direction of the air port. The equipment as a whole is often required to change the induced draft angle, which increases the workload of the operators.

[0003] In order to solve the above problems, after searching, a Chinese patent with announcement number CN218265991U discloses a special induced draft hood for coal mine ventilation equipment, which includes a base, a motor, a shaft, a connecting rod and an arc frame. The base is in a "Z"-shaped structure, and the motor is fixedly installed on the upper surface of the base located below by bolts. The shaft is located on one side of the motor and is movably connected to the base through a bearing. The output end of the motor and the outer surface of the shaft are both provided with pulleys, and the motor and the shaft are connected by a belt. A fixing ring is fixed on one end of the connecting rod close to the shaft, and the fixing ring is fixedly connected to the top of the shaft. The end of the connecting rod away from the shaft is fixedly connected to one side of the arc frame. A semi-arc groove corresponding to the surface of the induced draft hood main body is opened on the top of the arc frame, and the semi-arc groove of the arc frame fits with the bottom of the induced draft hood main body.

[0004] The above-mentioned device can start the electric motor, use the belt to drive the shaft to rotate, and then make the connecting rod swing, driving the arc frame to slide in the arc guide groove, thereby realizing the lateral angle adjustment of the hood; however, the mechanism cannot adjust the elevation and depression angles, resulting in the airflow being adsorbed only horizontally, making it difficult to cover the top and bottom areas of the coal mine; since the gas density is less than that of air, it is easy to accumulate at the top, but the hood cannot adjust the angle upward, resulting in the airflow having difficulty adsorbing the top gas layer, increasing the risk of gas exceeding the limit. Summary of the Invention

[0005] The object of the present invention is to provide an induced draft hood for coal mine ventilation equipment to solve the defects mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, a draft hood for coal mine ventilation equipment is provided, including a draft hood mechanism, a horizontal draft mechanism is installed at the bottom of the draft hood mechanism, a vertical draft mechanism is installed on the outside of the horizontal draft mechanism, a base is provided at the bottom of the vertical draft mechanism, a "U"-shaped support seat is fixedly installed at the bottom of the base, and three groups of support seats are evenly arranged at the bottom of the base, a negative pressure pipe is provided on the draft hood mechanism, a support plate is fixedly provided at the bottom of the negative pressure pipe, a driving arm is installed at the bottom of the support plate, a support block is provided at the bottom of the driving arm, an draft pipe is fixedly provided at the end of the negative pressure pipe, and an outer filter cartridge is sleeved on the inside of the draft pipe.

[0007] Furthermore, the induced draft hood mechanism includes a support plate, a negative pressure pipe, an induced draft duct, an outer filter cartridge, a holder and an inner filter cartridge. The outer filter cartridge is fixedly provided at the end of the inner filter cartridge. The cross-sections of the outer filter cartridge and the induced draft duct on its outside are both conical.

[0008] Furthermore, a holder is fixedly provided at the right end of the outer filter cartridge, and a holder is fixedly provided at the left end of the induced draft duct. Both sets of holders are arranged in a "U" shape. The outer filter cartridge is installed on the right end of the induced draft duct through the holder at the end, and the induced draft duct is connected to the negative pressure pipe through the holder at the left end. Multiple sets of filter holes are evenly arranged on the circumferential outer walls of the outer filter cartridge and the inner filter cartridge.

[0009] Furthermore, the hood mechanism is driven to rotate horizontally by a horizontal hood mechanism, and is driven to move vertically by a vertical hood mechanism. The outer sides of the horizontal hood mechanism and the vertical hood mechanism are wrapped with a protective cover, and a bearing seat is provided at the bottom of the protective cover. The cross-section of the protective cover is stepped, and the bottom of the protective cover is installed on the outer side of the bearing seat through a docking piece.

[0010] Furthermore, the lateral air induction mechanism includes a support block, a rotating plate, a mounting platform, a reducer A, a machine base and a support column. A rotating plate is provided at the bottom of the support block, and a mounting platform is provided at the bottom of the rotating plate. Both the mounting platform and the rotating plate are circular. Five groups of guide blocks are evenly installed at the bottom of the rotating plate. An annular guide groove is provided on the surface of the mounting platform, and the guide block is slidably arranged inside the guide groove.

[0011] Furthermore, a through hole is opened in the middle of the mounting platform, and a rotating shaft is installed in the middle of the bottom of the rotating plate. The rotating shaft passes through the through hole on the mounting platform and is fixed to the output shaft of the reducer A. Three groups of support columns are evenly installed on the circumferential outer wall of the mounting platform, and the bottoms of the three groups of support columns are fixed on the base; a machine base is installed on the three groups of support columns, and a reducer A is set on the machine base.

[0012] Furthermore, the vertical air-inducing mechanism includes an active disk, a limit frame, a limit plate, a guide rail, a stud, a threaded sleeve, a transmission gear, an active gear ring, an active gear, a reducer B, a bearing seat, a docking seat, and a driving arm. A guide rail is provided on the circumferential inner wall of the active disk, three groups of studs are evenly installed on the bottom of the active disk, and the bottoms of the three groups of studs are all threadedly installed with threaded sleeves; three groups of limit frames are evenly installed on the bottom of the active disk, and a dovetail-shaped limit groove is provided inside the limit frame, and a limit plate is inserted inside the limit groove, and the bottoms of the three groups of limit plates are fixedly connected to the base.

[0013] Furthermore, transmission gears are provided on the outer sides of the three sets of threaded sleeves, and the three sets of transmission gears are evenly distributed on the inner side of the active gear ring. The three sets of transmission gears are all engaged with the active gear ring. A bearing seat is installed on the outer side of the active gear ring, and three sets of docking seats are evenly installed on the bottom of the bearing seat. The bottoms of the three sets of docking seats are fixedly set on the circumferential outer wall of the base.

[0014] Furthermore, a driving gear is meshedly mounted on the inner side of the driving gear ring, a reducer B is provided at the bottom of the driving gear, the driving gear is mounted on the output shaft of the reducer B, and the reducer B is provided on the base through a mounting seat.

[0015] Furthermore, the driving arm includes a sleeve, a driving column, a mounting ring, a curved arm and a guide ball. One end of the driving column is fixedly connected to the support plate, and the other end of the driving column is fixedly installed with a mounting ring. A curved arm is provided on the circumferential outer wall of the mounting ring, and a guide ball is installed on the end of the curved arm away from the mounting ring. The sizes of the guide ball and the guide track are adapted, and the guide ball is slidably arranged inside the guide track. The cross-section of the guide track is circular. The outer side of the driving column is sleeved with a sleeve, and a support block is fixedly provided at the bottom of the sleeve.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. The present invention actively exhausts polluted gases through a synchronously rotating and swinging hood mechanism. This avoids the need for multiple fixed air outlets required for traditional multi-directional ventilation, which takes up tunnel space and easily interferes with transportation equipment, supports, etc. A single device, with its multi-directional functionality, replaces multiple fixed devices, reducing equipment density in the tunnel and improving operational safety. The centrifugal force generated by the lateral rotation and the upward and downward airflows generated by the vertical swing combine to form a spiral suction airflow in front of the hood mechanism. Compared with unidirectional airflow, this has a stronger suction capacity and can "draw" gas and dust from farther away into the negative pressure area. The combined axial velocity and tangential velocity of the spiral airflow can reduce the diffusion rate of pollutants and improve capture efficiency.

[0018] 2. The present invention drives the hood mechanism to rotate 360 ​​degrees horizontally through the horizontal induced draft mechanism, and drives the hood mechanism to swing vertically through the vertical induced draft mechanism. The two sets of actions can be performed synchronously without manual position adjustment to cover the entire horizontal area of ​​coal mine tunnels, goafs and other scenes, solving the problem that a single height air vent cannot take into account multiple layers of pollution; the movement trajectory of the hood mechanism forms a spiral scan, covering the target area without omission in three-dimensional space; compared with single linear movement, three-dimensional scanning can effectively improve the ventilation coverage efficiency; full-coverage ventilation can continuously control the gas concentration below the safety threshold, avoiding local accumulation reaching the explosion limit; the synchronous movement design further reduces the risk by shortening the existence time of high-concentration areas; the spatial coverage is comprehensive, reducing the range of ventilation blind spots. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view schematic diagram of the structure of the present invention;

[0020] Figure 2 A bottom view of the structure of the present invention;

[0021] Figure 3 It is a rear view of the structure of the present invention;

[0022] Figure 4 The structure of the present invention Figure 1 Schematic diagram of removing the shield;

[0023] Figure 5 The structure of the present invention Figure 4 Front view

[0024] Figure 6 The structure of the present invention Figure 4 Side view of;

[0025] Figure 7 The structure of the present invention Figure 4 Bottom view of

[0026] Figure 8 Schematic diagram of the structural drive arm of the present invention.

[0027] Reference numerals

[0028] 1. Draft hood mechanism; 10. Support plate; 11. Negative pressure pipe; 12. Draft duct; 13. Outer filter cartridge; 131. Clamping seat; 132. Inner filter cartridge; 2. Horizontal draft mechanism; 20. Support block; 21. Rotating plate; 211. Mounting table; 22. Reducer A; 23. Machine base; 24. Support column; 3. Vertical draft mechanism; 30. Active disk; 301. Limiting frame; 302. Limiting plate; 31. Guide rail; 32. Stud; 33. Screw sleeve; 34. Transmission gear; 35. Active gear ring; 351. Active gear; 352. Reducer B; 36. Bearing seat; 37. Docking seat; 38. Drive arm; 381. Sleeve; 382. Drive column; 383. Mounting ring; 384. Crank arm; 385. Guide ball; 4. Base; 5. Support seat; 6. Shield. DETAILED DESCRIPTION

[0029] Specific implementation method 1: Please refer to Figures 1-8 The present invention provides a technical solution: an induced draft hood for coal mine ventilation equipment, comprising an induced draft hood mechanism 1, a horizontal induced draft mechanism 2 is installed at the bottom of the induced draft hood mechanism 1, a vertical induced draft mechanism 3 is installed on the outside of the horizontal induced draft mechanism 2, a base 4 is provided at the bottom of the vertical induced draft mechanism 3, a "U"-shaped support seat 5 is fixedly installed at the bottom of the base 4, and three groups of support seats 5 are evenly arranged at the bottom of the base 4, a negative pressure pipe 11 is provided on the induced draft hood mechanism 1, a support plate 10 is fixedly provided at the bottom of the negative pressure pipe 11, a driving arm 38 is installed at the bottom of the support plate 10, a support block 20 is provided at the bottom of the driving arm 38, an induced draft pipe 12 is fixedly provided at the end of the negative pressure pipe 11, and an outer filter cartridge 13 is sleeved on the inside of the induced draft pipe 12.

[0030] Working principle: During actual use, a connecting flange is installed at the end of the induced draft hood mechanism 1, which can be connected to the external spring hose through the connecting flange. The spring hose is connected to the exhaust fan, and a negative pressure is formed inside the induced draft hood mechanism 1, which can induce air inside the coal mine. The induced draft hood mechanism 1 is respectively equipped with a horizontal induced draft mechanism 2 and a vertical induced draft mechanism 3. The induced draft hood mechanism 1 is driven by the horizontal induced draft mechanism 2 to rotate 360 ​​degrees horizontally, and the induced draft hood mechanism 1 is driven by the vertical induced draft mechanism 3 to swing vertically. The vertical swing action and the 360-degree horizontal rotation action can be performed synchronously. The induced draft hood mechanism 1 can rotate circumferentially and can cover the entire coal mine without manual position adjustment. It covers the entire horizontal area of ​​coal mine tunnels, goafs and other scenes, such as circular and annular spaces, to avoid the limitation that traditional fixed air vents can only cover one side or fan-shaped areas; in the process of mining the fully mechanized working face, the rotating induced draft hood mechanism 1 can synchronously cover the newly exposed space as the working face advances, and continuously extract gas and dust; the vertical swing setting enables the induced draft hood mechanism 1 to flexibly adjust its height to cover different vertical positions such as the gas accumulation position at the top of the tunnel, the personnel working area in the middle, and the dust deposition area at the bottom, solving the problem that a single height air vent cannot take into account multiple layers of pollution; the traditional fixed height exhaust hood may not be able to effectively extract the upper gas or the lower dust due to the ups and downs of the tunnel roof or the obstruction of equipment. The oscillating design can dynamically adapt to changes in space; when the horizontal rotation and vertical swing are carried out synchronously, the movement trajectory of the hood mechanism 1 forms a spiral scan, covering the target area without omission in three-dimensional space; compared with single linear motion, three-dimensional scanning can effectively improve the ventilation coverage efficiency; in coal mining, gas outburst points and dust generation sources may change dynamically with the progress of the operation; the synchronously rotating and swinging hood mechanism 1 can actively discharge polluted gases; avoid the need for traditional multi-directional ventilation to arrange multiple fixed air outlets, occupy the tunnel space and easily interfere with transportation equipment, brackets, etc.; the setting of a single device replaces multiple sets of fixed air outlets through one machine with multi-directional functions. The device reduces the equipment density in the tunnel and improves operational safety; the centrifugal force generated by the horizontal rotation and the up and down airflows formed by the vertical swing are superimposed to form a spiral suction airflow in front of the hood mechanism 1. Compared with the airflow in a single direction, its suction capacity is stronger and it can "draw" gas and dust from a farther distance into the negative pressure area; the axial speed and tangential speed of the spiral airflow are synthesized to reduce the diffusion rate of pollutants and improve the capture efficiency; full-coverage ventilation can continuously control the gas concentration below the safety threshold to avoid local accumulation reaching the explosion limit; the synchronous motion design further reduces the risk by shortening the existence time of the high-concentration area; the space coverage is comprehensive to reduce the range of ventilation dead corners.

[0031] The method for driving the 360-degree horizontal rotation of the induced draft hood mechanism 1 through the horizontal induced draft mechanism 2 is as follows: the external switch of the reducer A22 is started, and the output shaft of the reducer A22 drives the rotating piece 21 to rotate, and the rotating piece 21 drives the support plate 10 to rotate through the support block 20. At this time, the driving arm 38 is movably arranged and will not cause motion interference. At the same time, the support plate 10 can drive the induced draft hood mechanism 1 to rotate slowly, so that the induced draft hood mechanism 1 can perform 360-degree induced draft work inside the coal mine; at the same time, when the rotating piece 21 is rotating, the guide block at the bottom thereof is slidably arranged inside the guide groove, which can limit and guide the circular motion of the rotating piece 21, thereby ensuring the stability of the rotating piece 21 during rotation;

[0032] The hood mechanism 1 is driven to swing vertically through the vertical hood mechanism 3 as follows: the external switch of the reducer B352 is started, the output shaft of the reducer B352 drives the driving gear 351 to rotate, the driving gear 351 drives the three groups of transmission gears 34 meshing with it to rotate, the transmission gear 34 drives the screw sleeve 33 to rotate, the screw sleeve 33 is screwed with studs 32 inside, the three groups of studs 32 are synchronously stressed, and the purpose of synchronous lifting of the three groups of studs 32 is achieved, thereby achieving the purpose of lifting the active disk 30, the active disk 30 moves downward, and under the drive of the drive arm 38, the hood mechanism 1 swings downward, the active disk 30 moves upward, and under the drive of the drive arm 38, the hood mechanism 1 swings upward, achieving the vertical swing of the hood mechanism 1. Purpose: When the active disk 30 is lifted or lowered, the three groups of limit frames 301 at its bottom are inserted with the limit plates 302, which can limit and guide the vertically moving active disk 30 to ensure the stability of the active disk 30 when it is lifted or lowered. The driving method of the driving arm 38 is as follows: when the active disk 30 moves downward, the guide ball 385 slidably connected to the inside of the active disk 30 moves downward. At this time, the guide ball 385 rotates counterclockwise and drives the support plate 10 and the air hood mechanism 1 to rotate counterclockwise through the curved arm 384, the mounting ring 383, and the driving column 382, ​​thereby completing the purpose of swinging the air hood mechanism 1 upward; when the active disk 30 moves upward, the air hood mechanism 1 swings downward in the same manner as above.

[0033] When a negative pressure is formed inside the induced draft hood mechanism 1 and the gas inside the coal mine is ventilated, an outer filter cartridge 13 is provided at its end, and an inner filter cartridge 132 is provided at the end of the outer filter cartridge 13. The inner filter cartridge 132 is cylindrical and the outer filter cartridge 13 is conical. The setting of the conical structure makes the radial filtering area of ​​the outer filter cartridge 13 gradually decrease from the inlet to the outlet. The setting of the outer filter cartridge 13 and the inner filter cartridge 132 can increase the filtering area inside the induced draft hood mechanism 1. The larger filtering area can make the dust carried by the air flow passing through per unit time more fully mixed with the filter material. Contact, interception efficiency is improved; the conical outer filter cartridge 13 serves as an air inlet, which can slow down and diffuse the high-speed airflow through a tapered flow channel, so that the airflow enters the filter material surface evenly, avoiding the edge airflow concentration and low flow rate in the center area of ​​the inner filter cartridge 132 caused by radial air intake; the dust on the surface of the conical filter material is more likely to slide to the large end under the action of airflow shear force and gravity, forming an automatic dust unloading trend; the radial filtering direction of the cylindrical inner filter cartridge 132 makes the dust evenly adhere to the inner side of the filter material, forming a stable dust cake layer, avoiding dust re-suspension caused by airflow fluctuations.

[0034] Specific embodiment 2: This embodiment is a further limitation of specific embodiment 1. The draft hood mechanism 1 includes a support plate 10, a negative pressure tube 11, an induced draft duct 12, an outer filter cartridge 13, a holder 131 and an inner filter cartridge 132. The outer filter cartridge 13 is fixedly provided at the end of the inner filter cartridge 132. The cross-sections of the outer filter cartridge 13 and the induced draft duct 12 on its outer side are both conical.

[0035] Specific embodiment three: This embodiment is a further limitation of specific embodiment two. The right end of the outer filter cartridge 13 is fixedly provided with a holder 131, and the left end of the induced draft duct 12 is fixedly provided with a holder 131. Both sets of holders 131 are "U"-shaped. The outer filter cartridge 13 is installed on the right end of the induced draft duct 12 through the holder 131 at the end, and the induced draft duct 12 is clamped on the negative pressure tube 11 through the holder 131 at the left end. Multiple sets of filter holes are evenly arranged on the circumferential outer walls of the outer filter cartridge 13 and the inner filter cartridge 132.

[0036] Specific embodiment four: This embodiment is a further limitation of specific embodiment one. The air hood mechanism 1 is driven to rotate horizontally by the horizontal air induced mechanism 2, and the air hood mechanism 1 is driven to move vertically by the vertical air induced mechanism 3. The outer sides of the horizontal air induced mechanism 2 and the vertical air induced mechanism 3 are wrapped with a protective cover 6, and a bearing seat 36 is provided at the bottom of the protective cover 6. The cross-section of the protective cover 6 is stepped, and the bottom of the protective cover 6 is installed on the outer side of the bearing seat 36 through a docking piece.

[0037] The outer sides of the horizontal air induction mechanism 2 and the vertical air induction mechanism 3 are wrapped with a protective cover 6. The setting of the protective cover 6 can prevent dust from being applied to the mechanical structure wrapped therein.

[0038] Specific embodiment five: This embodiment is a further limitation of specific embodiment four. The horizontal air induction mechanism 2 includes a support block 20, a rotating plate 21, a mounting platform 211, a reducer A22, a base 23 and a support column 24. A rotating plate 21 is provided at the bottom of the support block 20, and a mounting platform 211 is provided at the bottom of the rotating plate 21. Both the mounting platform 211 and the rotating plate 21 are circular. Five groups of guide blocks are evenly installed on the bottom of the rotating plate 21. An annular guide groove is provided on the surface of the mounting platform 211, and the guide block is slidably arranged inside the guide groove.

[0039] Specific embodiment six: This embodiment is a further limitation of specific embodiment five, wherein a through hole is provided in the middle of the mounting platform 211, and a rotating shaft is installed in the middle of the bottom of the rotating plate 21. The rotating shaft passes through the through hole on the mounting platform 211 and is fixed to the output shaft of the reducer A22. Three groups of support columns 24 are evenly installed on the circumferential outer wall of the mounting platform 211, and the bottoms of the three groups of support columns 24 are all fixed on the base 4; a base 23 is installed on the three groups of support columns 24, and a reducer A22 is provided on the base 23.

[0040] Specific embodiment seven: This embodiment is a further limitation of specific embodiment four. The vertical air-inducing mechanism 3 includes an active disk 30, a limit frame 301, a limit plate 302, a guide rail 31, a stud 32, a screw sleeve 33, a transmission gear 34, an active gear ring 35, an active gear 351, a reducer B352, a bearing seat 36, a docking seat 37, and a driving arm 38. A guide rail 31 is provided on the circumferential inner wall of the active disk 30, and three groups of studs 32 are evenly installed on the bottom of the active disk 30. The bottoms of the three groups of studs 32 are all screwed with screw sleeves 33; three groups of limit frames 301 are evenly installed on the bottom of the active disk 30, and a dovetail-shaped limit groove is provided inside the limit frame 301. The limit groove is interspersed with a limit plate 302, and the bottoms of the three groups of limit plates 302 are all fixedly connected to the base 4.

[0041] Specific embodiment eight: This embodiment is a further limitation of specific embodiment seven. The outer sides of the three groups of threaded sleeves 33 are all provided with transmission gears 34. The three groups of transmission gears 34 are evenly distributed on the inner side of the active gear ring 35. The three groups of transmission gears 34 are all meshed with the active gear ring 35. The outer side of the active gear ring 35 is installed with a bearing seat 36. The bottom of the bearing seat 36 is evenly installed with three groups of docking seats 37. The bottoms of the three groups of docking seats 37 are fixedly set on the circumferential outer wall of the base 4.

[0042] Specific embodiment nine: This embodiment is a further limitation of specific embodiment eight. A driving gear 351 is meshedly installed on the inner side of the driving gear ring 35, and a reducer B352 is provided at the bottom of the driving gear 351. The driving gear 351 is installed on the output shaft of the reducer B352, and the reducer B352 is provided on the base 4 through a mounting seat.

[0043] Specific embodiment ten: This embodiment is a further limitation of specific embodiment one, and the driving arm 38 includes a sleeve 381, a driving column 382, ​​a mounting ring 383, a curved arm 384 and a guide ball 385. One end of the driving column 382 is fixedly connected to the support plate 10, and the other end of the driving column 382 is fixedly installed with the mounting ring 383. A curved arm 384 is provided on the circumferential outer wall of the mounting ring 383, and a guide ball 385 is installed on the end of the curved arm 384 away from the mounting ring 383. The guide ball 385 is adapted to the size of the guide rail 31, and the guide ball 385 is slidably set inside the guide rail 31. The cross-section of the guide rail 31 is circular, and the outer side of the driving column 382 is sleeved with a sleeve 381, and the bottom of the sleeve 381 is fixedly provided with a support block 20.

Claims

1. An induced draft hood for coal mine ventilation equipment, comprising an induced draft hood mechanism (1), characterized in that: The bottom of the induced draft hood mechanism (1) is provided with a horizontal induced draft mechanism (2), the outer side of the horizontal induced draft mechanism (2) is provided with a vertical induced draft mechanism (3), the bottom of the vertical induced draft mechanism (3) is provided with a base (4), the bottom of the base (4) is fixedly provided with a "U"-shaped support seat (5), and three groups of support seats (5) are evenly provided at the bottom of the base (4). A negative pressure pipe (11) is provided on the induced draft hood mechanism (1), the bottom of the negative pressure pipe (11) is fixedly provided with a support plate (10), the bottom of the support plate (10) is provided with a driving arm (38), and the bottom of the driving arm (38) is provided with a supporting block (20), the end of the negative pressure pipe (11) is fixedly provided with an induced draft pipe (12), and the interior of the induced draft pipe (12) is sleeved with an outer filter cartridge (13).

2. The induced draft hood for coal mine ventilation equipment according to claim 1, characterized in that: The induced draft hood mechanism (1) comprises a support plate (10), a negative pressure pipe (11), an induced draft pipe (12), an outer filter cartridge (13), a holder (131) and an inner filter cartridge (132). The outer filter cartridge (13) is fixedly provided at the end of the inner filter cartridge (132). The cross sections of the outer filter cartridge (13) and the induced draft pipe (12) outside the outer filter cartridge (13) are both conical.

3. The induced draft hood for coal mine ventilation equipment according to claim 2, characterized in that: A holder (131) is fixedly provided at the right end of the outer filter cartridge (13), and a holder (131) is fixedly provided at the left end of the induced air duct (12). Both sets of holders (131) are arranged in a "U" shape. The outer filter cartridge (13) is installed on the right end of the induced air duct (12) through the holder (131) at the end, and the induced air duct (12) is clamped on the negative pressure pipe (11) through the holder (131) at the left end. Multiple sets of filter holes are evenly arranged on the circumferential outer walls of the outer filter cartridge (13) and the inner filter cartridge (132).

4. The induced draft hood for coal mine ventilation equipment according to claim 1, characterized in that: The induced draft hood mechanism (1) is driven to rotate horizontally by the horizontal induced draft mechanism (2), and is driven to move vertically by the vertical induced draft mechanism (3). The outer sides of the horizontal induced draft mechanism (2) and the vertical induced draft mechanism (3) are wrapped with a protective cover (6), and a bearing seat (36) is provided at the bottom of the protective cover (6). The cross section of the protective cover (6) is stepped, and the bottom of the protective cover (6) is mounted on the outer side of the bearing seat (36) through a docking piece.

5. The induced draft hood for coal mine ventilation equipment according to claim 4, characterized in that: The transverse air induction mechanism (2) comprises a support block (20), a rotating plate (21), a mounting platform (211), a reducer A (22), a machine base (23) and a support column (24). The support block (20) is provided with a rotating plate (21) at the bottom, and the mounting platform (211) is provided at the bottom of the rotating plate (21). Both the mounting platform (211) and the rotating plate (21) are circular. Five groups of guide blocks are evenly installed at the bottom of the rotating plate (21). An annular guide groove is provided on the surface of the mounting platform (211), and the guide blocks are slidably arranged inside the guide groove.

6. The induced draft hood for coal mine ventilation equipment according to claim 5, characterized in that: A through hole is provided in the middle of the mounting platform (211), a rotating shaft is installed in the middle of the bottom of the rotating plate (21), the rotating shaft passes through the through hole on the mounting platform (211) and is fixed to the output shaft of the reducer A (22), three groups of support columns (24) are evenly installed on the circumferential outer wall of the mounting platform (211), and the bottoms of the three groups of support columns (24) are fixed on the base (4); the three groups of support columns (24) are installed on the machine base (23), and the reducer A (22) is provided on the machine base (23).

7. The induced draft hood for coal mine ventilation equipment according to claim 4, characterized in that: The vertical air induction mechanism (3) comprises an active disk (30), a limiting frame (301), a limiting plate (302), a guide rail (31), a stud (32), a screw sleeve (33), a transmission gear (34), an active gear ring (35), an active gear (351), a reducer B (352), a bearing seat (36), a docking seat (37), and a driving arm (38). The guide rail (31) is provided on the inner circumferential wall of the active disk (30). Three groups of studs (32) are evenly installed on the bottom of the active disk (30). The bottoms of the three groups of studs (32) are all screwed and installed with screw sleeves (33). Three groups of limiting frames (301) are evenly installed on the bottom of the active disk (30). The inside of the limiting frame (301) is provided with a dovetail-shaped limiting groove. The limiting groove is interspersed with a limiting plate (302). The bottoms of the three groups of limiting plates (302) are all fixedly connected to the base (4).

8. The induced draft hood for coal mine ventilation equipment according to claim 7, characterized in that: The outer sides of the three sets of screw sleeves (33) are all provided with transmission gears (34). The three sets of transmission gears (34) are evenly distributed on the inner side of the active gear ring (35). The three sets of transmission gears (34) are all meshed with the active gear ring (35). The outer side of the active gear ring (35) is provided with a bearing seat (36). The bottom of the bearing seat (36) is evenly provided with three sets of docking seats (37). The bottoms of the three sets of docking seats (37) are fixedly provided on the circumferential outer wall of the base (4).

9. The induced draft hood for coal mine ventilation equipment according to claim 8, characterized in that: A driving gear (351) is meshedly mounted on the inner side of the driving gear ring (35), a reducer B (352) is arranged at the bottom of the driving gear (351), the driving gear (351) is mounted on the output shaft of the reducer B (352), and the reducer B (352) is arranged on the base (4) through a mounting seat.

10. The induced draft hood for coal mine ventilation equipment according to claim 1, characterized in that: The driving arm (38) includes a sleeve (381), a driving column (382), a mounting ring (383), a curved arm (384) and a guide ball (385). One end of the driving column (382) is fixedly connected to the support plate (10). The other end of the driving column (382) is fixedly mounted with the mounting ring (383). A curved arm (384) is provided on the circumferential outer wall of the mounting ring (383). A guide ball (385) is installed at one end of the curved arm (384) away from the mounting ring (383). The size of the guide ball (385) and the guide track (31) are adapted. The guide ball (385) is slidably arranged inside the guide track (31). The cross section of the guide track (31) is circular. The outer side of the driving column (382) is sleeved with the sleeve (381). The bottom of the sleeve (381) is fixedly mounted with a support block (20).

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