Self-moving double pressure open pit mine ventilation device

Abstract

The application discloses a self-moving double-pressure open-pit mine ventilation device, and relates to the technical field of ventilation devices, comprising a mounting plate, a working cylinder is fixedly installed on the top wall of the mounting plate, a plurality of negative pressure air suction pipes are installed on the top side wall of the working cylinder, a positive pressure air outlet pipe is installed on the bottom side wall of the working cylinder, an air extraction assembly is arranged in the working cylinder, the air extraction assembly is used for extracting dust gas into the working cylinder, and a scraping mechanism is arranged in the negative pressure air suction pipe. The scraping mechanism, the driving assembly, the connecting rod and the threaded sliding block are matched with each other, the scraping ring can be driven to reciprocate, dust accumulated on the inner wall of the negative pressure air suction pipe is avoided, and the inner wall of the negative pressure air suction pipe is conveniently cleaned by later workers.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ventilation devices, in particular to a self-moving double-pressure open-pit mine ventilation device. BACKGROUND

[0002] The open-pit coal mine refers to the coal layer deposited on the ground or shallow layer due to geographical changes, which is directly mined by open-pit mining. The open-pit coal mine is an important part of the coal industry. The deep concave open-pit mine stope is affected by blasting vibration and mining and transportation work, and a large amount of dust, gun smoke and other harmful gases are generated, which causes serious air pollution. Especially in the season with relatively low temperature, due to the reasons such as coal seam spontaneous combustion, coal mining and transportation facilities operation, poor air flow, and the surrounding dust and other pollutants gathered in the pit, a local small reverse temperature layer is easily generated, which is like a thick cover covering the open-pit coal mine.

[0003] According to the search, the Chinese patent with the application number CN202010158834.0 discloses a self-moving double-pressure open-pit mine ventilation device. The negative pressure ventilator, negative pressure air inlet cylinder and negative pressure air outlet cylinder are used to discharge the dust, gun smoke and other pollutants generated in the open-pit mine stope to the outside of the stope, so as to improve the air quality and visibility in the stope. The positive pressure ventilator, positive pressure air inlet cylinder and positive pressure air outlet cylinder are used to stir the air flow above the open-pit coal mine, so as to purify the haze above the open-pit coal mine. The device implements comprehensive ventilation and dust removal on the open-pit mine stope through the above two functions, so as to effectively improve the atmospheric environment of the open-pit mine production site and meet the requirements of safe and efficient production of the open-pit mine.

[0004] However, due to the large amount of dust in the open-pit mine, the dust adheres to the inner wall of the negative pressure air inlet cylinder after being used for a period of time. If the dust is not cleaned in time, the dust adhering to the inner wall of the negative pressure air inlet cylinder will be solidified after the rain, which is not convenient for the cleaning of the inner wall of the negative pressure air inlet cylinder by the later workers. Therefore, in order to avoid the accumulation of coal ash on the inner wall of the negative pressure air inlet cylinder as much as possible, a self-moving double-pressure open-pit mine ventilation device is designed. SUMMARY

[0005] The purpose of the present application is to solve the shortcomings in the prior art, and a self-moving double-pressure open-pit mine ventilation device is provided.

[0006] In order to achieve the above purpose, the present application adopts the following technical scheme:

[0007] A self-moving double-pressure open-pit mine ventilation device, comprising a mounting plate, a working cylinder is fixedly installed on the top wall of the mounting plate, a plurality of negative pressure air suction pipes are installed on the top side wall of the working cylinder, a positive pressure air outlet pipe is installed on the bottom side wall of the working cylinder, an air extraction assembly is arranged in the working cylinder, the air extraction assembly is used to extract dust gas into the inside of the working cylinder,

[0008] The inside of the negative pressure air suction pipe is provided with a scraping mechanism, the scraping mechanism comprises a scraper ring installed in the inside of the negative pressure air suction pipe, the outer wall of the scraper ring is matched with the inner wall of the negative pressure air suction pipe, a plurality of connecting rods are fixedly installed on the inner side wall of the scraper ring, and the ends of the plurality of connecting rods away from the scraper ring are commonly installed on the outer wall of a threaded sliding block.

[0009] The above technical scheme further comprises: the air suction assembly comprises a driving motor installed on the bottom wall of the mounting plate through a mounting bracket, the output shaft of the driving motor is movably penetrated from the inner wall of the mounting plate, a rotating shaft is fixedly installed at the end of the output shaft of the driving motor, one end of the rotating shaft away from the driving motor is rotatably connected to the top wall of the working cylinder, and a negative pressure fan is installed on the outer wall of the rotating shaft.

[0010] The driving assembly comprises a driving bevel gear fixedly installed on the outer wall of the rotating shaft, a reciprocating screw rod is rotatably installed in the inside of the negative pressure air suction pipe through a bearing connecting rod, a driven bevel gear is fixedly installed at the bottom end of the reciprocating screw rod, the driven bevel gear is engaged with the driving bevel gear, and the threaded sliding block is threadedly connected to the outer wall of the reciprocating screw rod.

[0011] A filter plate is fixedly installed on the inner bottom end side wall of the negative pressure air suction pipe, the reciprocating screw rod movably penetrates the filter plate, an open groove is formed in the outer wall of the negative pressure air suction pipe below the filter plate, a drawer box is installed on the outer wall of the negative pressure air suction pipe below the open groove, and a drawer is movably installed in the inner wall of the drawer box.

[0012] A cleaning mechanism is arranged on the negative pressure air suction pipe, the cleaning mechanism is used for cleaning large particle dust on the filter plate, the cleaning mechanism comprises a gas collecting box fixedly installed on the outer wall of the negative pressure air suction pipe, a plurality of inclined holes are formed in the bottom wall of the negative pressure air suction pipe and the gas collecting box, the bottom openings of the inclined holes are towards the outer wall of the filter plate, and a gas injection assembly is arranged in the inside of the working cylinder.

[0013] The gas injection assembly comprises a gas pipe fixedly installed in the inside of the working cylinder, one end of the gas pipe is fixedly installed on the filter plate, the other end of the gas pipe is fixedly installed on the gas collecting box, a second one-way valve is fixedly installed in the inside of one end of the gas pipe close to the gas collecting box, an air inlet pipe is installed on the outer wall of the gas pipe, a first one-way valve is installed in the inside of the air inlet pipe, a piston is movably installed on the inner wall of one end of the gas pipe away from the gas collecting box, a self-resetting extrusion assembly is arranged on the outer wall of the piston, a fixed rod is fixedly installed on the outer wall of the connecting rod, and a top plate is fixedly installed at one end of the fixed rod away from the connecting rod.

[0014] The self-resetting extrusion assembly comprises a connecting rod fixedly installed on the outer wall of the piston, one end of the connecting rod away from the piston is fixedly installed with a push plate, the push plate is parallel to the top plate, the outer part of the connecting rod is sleeved with a spring, one end of the spring is fixedly connected to the end wall of the air pipe, and the other end of the spring is fixedly connected to the outer wall of the push plate.

[0015] The inner wall of the negative pressure air suction pipe is provided with a limiting groove, the outer wall of the scraping ring is fixedly installed with a limiting sliding block, and the outer wall of the limiting sliding block is slidingly connected to the inner wall of the limiting groove.

[0016] The bottom of the mounting plate is provided with a self-moving device, two electric telescopic rods are fixedly installed on the frame of the self-moving device, one end of the electric telescopic rod away from the self-moving device is fixedly connected to the bottom wall of the mounting plate, four limiting rods are also fixedly installed on the frame of the self-moving device, and the limiting rods are movably penetrated through the.

[0017] Compared with the prior art, the beneficial effects of the present application are:

[0018] 1、In the present application, the scraping mechanism is provided, and the driving assembly, the connecting rod and the threaded sliding block in the scraping mechanism are matched with each other to drive the scraping ring to reciprocate, so that dust accumulated on the inner wall of the negative pressure air suction pipe is avoided, and then the cleaning of the inner wall of the negative pressure air suction pipe by the later staff is facilitated, and the driving part of the negative pressure fan drives the scraping mechanism to work, thereby saving the investment cost in the early stage of equipment production.

[0019] 2、In the present application, the filter plate is provided, some large particle substances in the dust are blocked by the filter plate, the large particle impurities are prevented from entering and accumulating in the working cylinder, the workload of the later staff for cleaning the working cylinder is reduced, and the opening groove is formed in the outer wall of the negative pressure air suction pipe, the large particle impurities are discharged to the outside of the negative pressure air suction pipe through the opening groove, the large particle impurities are prevented from accumulating in the negative pressure air suction pipe, and the smoothness of the gas passage in the negative pressure air suction pipe is improved.

[0020] 3、In the present application, the cleaning mechanism is provided, and the self-resetting extrusion assembly, the piston, the air pipe, the first one-way valve and the second one-way valve, the gas collecting box and the inclined hole in the cleaning mechanism are matched with each other to clean the large particle impurities adhered to the filter plate, the filter plate is prevented from being blocked by the large particle impurities, and the smoothness of the gas passage in the negative pressure air suction pipe is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a whole structure schematic view of a self-moving double-pressure open-pit mine ventilation device according to the present application;

[0022] Figure 2It is a sectional view structural schematic diagram of a self-moving double-pressure open-pit mine ventilation device;

[0023] Figure 3 It is a structural schematic diagram of the self-moving device;

[0024] Figure 4 It is a structural schematic diagram of the cleaning mechanism;

[0025] Figure 5 It is Figure 1 It is a sectional view structural schematic diagram of the negative pressure air suction pipe in the a direction;

[0026] Figure 6 It is Figure 2 It is an enlarged structural schematic diagram at A in the middle;

[0027] Figure 7 It is Figure 2 It is an enlarged structural schematic diagram at B in the middle;

[0028] Figure 8 It is Figure 7 It is an enlarged structural schematic diagram at C in the middle;

[0029] Figure 9 It is Figure 7 It is an enlarged structural schematic diagram at D in the middle;

[0030] Figure 10 It is Figure 5 It is an enlarged structural schematic diagram at E in the middle.

[0031] In the figure:

[0032] 10, self-moving device; 11, electric telescopic rod; 12, limiting rod;

[0033] 20, mounting plate;

[0034] 30, working cylinder;

[0035] 40, negative pressure air suction pipe; 41, filter plate; 42, drawer; 43, open slot; 44, drawer box;

[0036] 50, positive pressure air outlet pipe;

[0037] 61, driving motor; 62, rotating shaft; 63, negative pressure fan;

[0038] 71, driving bevel gear; 72, driven bevel gear; 73, reciprocating screw rod; 74, scraping ring; 75, connecting rod; 76, threaded sliding block; 77, bearing connecting rod; 78, limiting groove; 79, limiting sliding block;

[0039] 81, trachea; 82, gas collecting box; 83, inclined hole; 84, air inlet pipe; 85, first one-way valve; 86, second one-way valve; 87, connecting rod; 88, piston; 89, spring; 810, push plate; 811, fixed rod; 812, top plate. DETAILED DESCRIPTION

[0040] The technical solutions of the present application are further described below in combination with the drawings and specific embodiments.

[0041] Embodiment one

[0042] Referring to the drawings Figures 1-10 The present application provides a self-moving double-pressure open-pit mine ventilation device, which is mainly used in deep concave open-pit mine stope.

[0043] The installation plate 20 is provided with a working cylinder 30 fixedly installed on the top wall of the installation plate 20; wherein the working cylinder 30 is provided with a sealing box door (not shown), which can be used for cleaning the inside of the working cylinder 30 by opening the sealing box door.

[0044] A plurality of negative pressure air suction pipes 40 are installed on the top side wall of the working cylinder 30, and a positive pressure air outlet pipe 50 (the positive pressure air outlet pipe 50 can be selected as a hose) is installed on the bottom side wall of the working cylinder 30, and an air extraction assembly is arranged inside the working cylinder 30, which is used to extract dust gas into the inside of the working cylinder 30; wherein the negative pressure air suction pipe 40 is provided with at least two, which improves the range of air extraction.

[0045] The inside of the negative pressure air suction pipe 40 is provided with a scraping mechanism, which includes a scraping ring 74 (wherein the cross section of the scraping ring 74 is trapezoidal) installed inside the negative pressure air suction pipe 40, the outer wall of the scraping ring 74 is in close contact with the inner wall of the negative pressure air suction pipe 40, a plurality of connecting rods 75 are fixedly installed on the inner side wall of the scraping ring 74, and the ends of the plurality of connecting rods 75 away from the scraping ring 74 are commonly installed on the outer wall of a threaded sliding block 76, and a driving assembly is arranged inside the working cylinder 30, which is used to drive the threaded sliding block 76 to move; wherein by moving the threaded sliding block 76, the connecting rod 75 and the scraping ring 74 are driven to move, so as to perform scraping and cleaning action on the inner wall of the negative pressure air suction pipe 40.

[0046] The suction assembly includes a drive motor 61 mounted on the bottom wall of the mounting plate 20 via a mounting bracket. The output shaft of the drive motor 61 extends through the inner wall of the mounting plate 20. A rotating shaft 62 is fixedly mounted on the end of the output shaft of the drive motor 61. The end of the rotating shaft 62 away from the drive motor 61 is rotatably connected to the top wall of the working cylinder 30. A negative pressure fan 63 is mounted on the outer wall of the rotating shaft 62. When the drive motor 61 is started, the drive motor 61 drives the rotating shaft 62 to rotate, and the rotating shaft 62 drives the negative pressure fan 63 to rotate, thereby generating a negative pressure suction force above the negative pressure fan 63, which in turn generates a negative pressure suction force inside the negative pressure suction pipe 40.

[0047] The drive assembly includes a drive bevel gear 71 fixedly mounted on the outer wall of the rotating shaft 62, and a reciprocating screw 73 rotatably mounted inside the negative pressure suction pipe 40 via a bearing connecting rod 77 (wherein, such as Figure 7 The thread groove length of the reciprocating screw 73 is set to be the distance from the top to near the filter plate 41. A driven bevel gear 72 is fixedly installed at the bottom end of the reciprocating screw 73. The driven bevel gear 72 meshes with the driving bevel gear 71. The threaded slider 76 is threadedly connected to the outer wall of the reciprocating screw 73. At least two bearing connecting rods are provided on the outer wall of the reciprocating screw 73, one at the top end of the reciprocating screw 73 and the other at the bottom side wall of the reciprocating screw 73. The end of the bearing connecting rod located on the bottom side wall away from the reciprocating screw 73 is fixedly installed on the inner wall of the working cylinder 30. The provision of at least two bearing connecting rods ensures the stability of the rotation of the reciprocating screw 73.

[0048] A filter plate 41 (used to block large particles of dust) is fixedly installed on the inner bottom side wall of the negative pressure suction pipe 40. A reciprocating screw 73 moves through the filter plate 41. An opening groove 43 is provided on the outer wall of the negative pressure suction pipe 40 below the filter plate 41. A drawer box 44 is installed on the outer wall of the negative pressure suction pipe 40 below the opening groove 43. A drawer 42 is movably installed on the inner wall of the drawer box 44. When the drawer 42 is installed inside the drawer box 44, the inside of the drawer box 44 is in a relatively closed state. That is, when the negative pressure suction pipe 40 is evacuated, the outside gas will not enter the negative pressure suction pipe 40 from the inside of the opening groove 43.

[0049] A cleaning mechanism is provided on the negative pressure suction pipe 40. The cleaning mechanism is used to clean large particles of dust on the filter plate 41. The cleaning mechanism includes an air collection box 82 fixedly installed on the outer wall of the negative pressure suction pipe 40. The air collection box 82 and the bottom wall of the negative pressure suction pipe 40 are provided with multiple oblique holes 83. The bottom opening of the oblique holes 83 faces the outer wall of the filter plate 41. An air jet assembly is provided inside the working cylinder 30. The cleaning mechanism cleans the large particles of impurities adhering to the outer wall of the filter plate 41, preventing the accumulation of large particles of impurities on the filter plate 41 and improving the smoothness of the gas passage inside the negative pressure suction pipe.

[0050] The jet assembly includes an air pipe 81 fixedly installed inside the working cylinder 30, with one end of the air pipe 81 fixedly mounted on the filter plate 41 (wherein, such as Figure 7 The top end of the air pipe 81 extends to the left side of the filter plate 41, and the other end of the air pipe 81 is fixedly installed on the air collection box 82 (the air pipe 81 is connected to the interior of the air collection box 82). A second one-way valve 86 is fixedly installed inside the end of the air pipe 81 near the air collection box 82. An air inlet pipe 84 is installed on the outer wall of the air pipe 81, and a first one-way valve 85 is installed inside the air inlet pipe 84. A piston 88 is movably installed on the inner wall of the end of the air pipe 81 away from the air collection box 82. A self-resetting compression assembly is provided on the outer wall of the piston 88. A fixing rod 811 is fixedly installed on the outer wall of the connecting rod 75, and a top plate 812 is fixedly installed on the end of the fixing rod 811 away from the connecting rod 75. Wherein, as Figure 4 When the piston 88 is pushed to the lower right, the piston 88 compresses the air inside the air pipe 81, thereby forcing the air into the air collection box 82, and then the gas in the air collection box 82 is ejected from the inclined hole 83 onto the filter plate 41; when the piston 88 is pulled (i.e., when the piston 88 moves to the upper left), the outside gas enters the air pipe 81 from the inside of the air inlet pipe 84.

[0051] The self-resetting compression assembly includes a connecting rod 87 fixedly mounted on the outer wall of piston 88. A push plate 810 is fixedly mounted on the end of the connecting rod 87 away from piston 88. A top plate 812 is parallel to the push plate 810. A spring 89 is sleeved on the outside of the connecting rod 87. One end of the spring 89 is fixedly connected to the end wall of the air pipe 81, and the other end of the spring 89 is fixedly connected to the outer wall of the push plate 810. When the top plate 812 completes the compression of the push plate 810, as the top plate 812 moves, the top plate 812 and the push plate 810 gradually separate. At this time, the push plate 810 resets under the elastic potential energy of the spring 89, thereby driving the piston 88 to reset. Figure 4 The initial position in.

[0052] The inner wall of the negative pressure air suction pipe 40 is provided with a limiting groove 78 (the bottom end of the limiting groove 78 is communicated with the opening groove 43, so that the dust and ash scraped off in the limiting groove 78 can also fall into the drawer 42 through the opening groove 43), the outer wall of the scraping ring 74 is fixedly installed with a limiting sliding block 79, and the outer wall of the limiting sliding block 79 is slidably connected to the inner wall of the limiting groove 78; in order to ensure the stability of the scraping ring 74 during movement, the limiting groove 78 and the limiting sliding block 79 are arranged to limit the scraping ring 74, that is, when the scraping ring 74 moves, the limiting sliding block 79 slides on the inner wall of the limiting groove 78.

[0053] The bottom of the mounting plate 20 is provided with a self-moving device 10, two electric telescopic rods 11 are fixedly installed on the frame of the self-moving device 10, one end of the electric telescopic rod 11 away from the self-moving device 10 is fixedly connected to the bottom wall of the mounting plate 20, and four limiting rods 12 are also fixedly installed on the frame of the self-moving device 10 and movably penetrate through the mounting plate 20; wherein the self-moving device 10 is selected from a tracked mobile device, which is prior art and will not be described herein; in addition, the electric telescopic rod 11 is installed on the self-moving device 10, and the limiting rod 12 is arranged to limit the movement of the mounting plate 20, the mounting plate 20 can be lifted by the electric telescopic rod 11, and then the negative pressure air suction pipe 40 can be lifted, so as to facilitate the cleaning of dust gas in the deep concave open pit.

[0054] In this embodiment, the working principle of the device is that when the device is used to clean the dust gas in the deep concave open pit, the device is moved to a suitable position by the self-moving device 10, and then the driving motor 61 can be started to drive the negative pressure fan 63 to rotate, so that the negative pressure is generated in the working cylinder 30, and then the negative pressure is generated in the plurality of negative pressure air suction pipes 40, the dust gas in the deep concave open pit is adsorbed into the working cylinder 30 after the negative pressure is generated in the negative pressure air suction pipe 40, the dust gas adsorbed into the working cylinder 30 flows downward and is discharged from the positive pressure air outlet pipe 50 to the stope, so as to improve the air quality and visibility in the stope;

[0055] When the shaft 62 rotates, the shaft 62 drives the driving bevel gear 71 to rotate, the teeth on the outer wall of the driving bevel gear 71 are engaged with the teeth on the outer wall of the driven bevel gear 72, so as to drive the driven bevel gear 72 to rotate, the driven bevel gear 72 drives the reciprocating screw rod 73 to rotate, the threads on the outer wall of the reciprocating screw rod 73 are engaged with the threads on the inner wall of the screw block 76, so as to drive the screw block 76 to move, the screw block 76 moves to drive the scraping ring 74 and the connecting rod 75 to move, so as to scrape off the dust adhered to the inner wall of the negative pressure air suction pipe 40, and then avoid the dust adhered to the inner wall of the negative pressure air suction pipe 40, which is convenient for workers to clean the inner wall of the negative pressure air suction pipe 40 in the later period;

[0056] When the threaded slider 76 moves downward, the threaded slider 76 drives the top plate 812 to move downward, and as the top plate 812 continuously moves downward, the top plate 812 presses the push plate 810, thereby driving the connecting rod 87 and the piston 88 to move downward, and after the piston 88 moves downward, the piston 88 extrudes the air in the air pipe 81, so that the air in the gas collecting box 82 is sprayed out through the inclined hole 83, and then sprayed on the filter plate 41, so that the large-particle impurities adhered to the filter plate 41 roll downward and enter the inside of the drawer 42 through the open slot 43, and the large-particle impurities and the dust and ash scraped from the inner wall of the negative pressure air pipe 40 are collected through the drawer 42, and workers only need to pull out the drawer 42 from the drawer box 44 to clean, which is convenient to operate;

[0057] The device can comprehensively ventilate and dedust the open-pit mine stope through the negative pressure air pipe 40 and the positive pressure air pipe 50, effectively improve the atmospheric environment of the open-pit mine production site, meet the requirements of safe and efficient production of the open-pit mine, and conveniently clean the dust in the device and maintain the equipment.

[0058] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A self-moving, dual pressure open pit mine ventilation device, characterized in that, Including the mounting plate (20), the mounting plate (20) The top wall is fixedly installed with a working cylinder (30), the top wall of the working cylinder (30) is installed with a plurality of negative pressure suction pipes (40), the bottom wall of the working cylinder (30) is installed with a positive pressure exhaust pipe (50), the inside of the working cylinder (30) is provided with an air exhaust assembly, the air exhaust assembly is used for sucking dust gas into the inside of the working cylinder (30), The inside of the negative pressure suction pipe (40) is provided with a scraping mechanism, the scraping mechanism includes a scraping ring (74) mounted in the inside of the negative pressure suction pipe (40), the outer wall of the scraping ring (74) is fitted with the inner wall of the negative pressure suction pipe (40), a plurality of connecting rods (75) are fixedly installed on the inner side wall of the scraping ring (74), the ends of the plurality of connecting rods (75) away from the scraping ring (74) are commonly installed on the outer wall of the threaded sliding block (76), the inside of the working cylinder (30) is provided with a driving assembly, and the driving assembly is used to drive the threaded sliding block (76) to move; The air exhaust assembly includes a driving motor (61) mounted on the bottom wall of the mounting plate (20) through a mounting frame, the output shaft of the driving motor (61) is movably penetrated from the inner wall of the mounting plate (20), the output shaft end of the driving motor (61) is fixedly installed with a rotating shaft (62), one end of the rotating shaft (62) away from the driving motor (61) is rotatably connected to the top wall of the working cylinder (30), and the outer wall of the rotating shaft (62) is installed with a negative pressure fan (63); The driving assembly includes a driving bevel gear (71) fixedly installed on the outer wall of the rotating shaft (62), the inside of the negative pressure suction pipe (40) is rotatably installed with a reciprocating screw rod (73) through a bearing connecting rod (77), the bottom end of the reciprocating screw rod (73) is fixedly installed with a driven bevel gear (72), the driven bevel gear (72) is engaged with the driving bevel gear (71), and the threaded sliding block (76) is threadedly connected to the outer wall of the reciprocating screw rod (73); The bottom end side wall of the inside of the negative pressure suction pipe (40) is fixedly installed with a filter plate (41), the reciprocating screw rod (73) movably penetrates the filter plate (41), an opening groove (43) is formed in the outer wall of the negative pressure suction pipe (40) below the filter plate (41), and a drawer box (44) is installed on the outer wall of the negative pressure suction pipe (40) below the opening groove (43). The inner wall of the drawer box (44) movably installs a drawer (42); The negative pressure suction pipe (40) is provided with a cleaning mechanism, the cleaning mechanism is used for cleaning large particle dust on the filter plate (41), the cleaning mechanism includes a gas collecting box (82) fixedly installed on the outer wall of the negative pressure suction pipe (40), a plurality of inclined holes (83) are formed in the bottom wall of the negative pressure suction pipe (40) and the gas collecting box (82), the bottom openings of the inclined holes (83) face the outer wall of the filter plate (41), and the inside of the working cylinder (30) is provided with a gas injection assembly; The jet assembly comprises a gas pipe (81) fixedly installed inside the working barrel (30), one end of the gas pipe (81) is fixedly installed on the filter plate (41), the other end of the gas pipe (81) is fixedly installed on the gas collecting box (82), a second one-way valve (86) is fixedly installed inside the end of the gas pipe (81) close to the gas collecting box (82), an air inlet pipe (84) is installed on the outer wall of the gas pipe (81), a first one-way valve (85) is installed inside the air inlet pipe (84), a piston (88) is movably installed on the inner wall of the end of the gas pipe (81) away from the gas collecting box (82), a self-resetting extrusion assembly is arranged on the outer wall of the piston (88), a fixed rod (811) is fixedly installed on the outer wall of the connecting rod (75), a top plate (812) is fixedly installed on the end of the fixed rod (811) away from the connecting rod (75).

2. A self-moving double pressure open pit mine ventilation device according to claim 1, characterized in that, The self-resetting extrusion assembly comprises a connecting rod (87) fixedly installed on the outer wall of the piston (88), a push plate (810) is fixedly installed on the end of the connecting rod (87) away from the piston (88), the top plate (812) is parallel to the push plate (810), a spring (89) is sleeved outside the connecting rod (87), one end of the spring (89) is fixedly connected to the end wall of the gas pipe (81), the other end of the spring (89) is fixedly connected to the outer wall of the push plate (810). The inner wall of the negative pressure air suction pipe (40) is provided with a limiting groove (78), the outer wall of the scraping ring (74) is fixedly provided with a limiting sliding block (79), and the outer wall of the limiting sliding block (79) is slidably connected to the inner wall of the limiting groove (78).

3. A self-moving double pressure open pit mine ventilation device according to claim 1, characterized in that, The bottom of the mounting plate (20) is provided with a self-moving device (10), two electric telescopic rods (11) are fixedly installed on the frame of the self-moving device (10), one end of the electric telescopic rod (11) away from the self-moving device (10) is fixedly connected to the bottom wall of the mounting plate (20), four limiting rods (12) are also fixedly installed on the frame of the self-moving device (10), and the limiting rods (12) movably penetrate through the mounting plate (20).

4. A self-moving double pressure open pit mine ventilation device according to claim 1, characterized in that, ​

Images