Ventilation device for mining under metal mine

Abstract

The invention discloses a metal mine underground mining ventilation device, and relates to the technical field of mine ventilation devices, the metal mine underground mining ventilation device comprises a ventilator, the ventilator is formed by splicing an equal-diameter sleeve and a variable-diameter sleeve, and the equal-diameter sleeve and the variable-diameter sleeve are each internally and fixedly provided with an electric control flow fan; an overhauling mechanism facilitating rough overhauling of workers is arranged on the outer side of the ventilator; the middle part of the ventilator is provided with a connecting mechanism which is convenient for workers to disassemble and assemble the ventilator; a moving mechanism for moving the ventilator is arranged at the bottom of the ventilator; a multi-stage push rod assembly is mounted at the top of the moving mechanism; the overhauling mechanism, the connecting mechanism and the moving mechanism are driven to operate in sequence through stepping stretching and retracting of the multi-stage push rod assembly, and therefore workers can overhaul the electric control flow fan conveniently. The ventilation device for mining under the metal mine, disclosed by the invention, has the effects of multiple maintenance modes and multifunctionality.

Description

Technical Field

[0001] The present invention relates to the technical field of mine ventilation devices, and particularly to a ventilation device for underground mining in metal mines. Background Art

[0002] Mine ventilation refers to the input of fresh air into the mine to increase the oxygen concentration, so as to dilute and remove toxic, harmful gases and dust in the mine; the basic tasks of mine ventilation are: supplying sufficient fresh air underground to meet the oxygen needs of personnel; diluting harmful gases and dust underground to ensure safe production; regulating the underground climate to create a good working environment; in order to make the underground air flow along the designated route for distribution, it is necessary to build structures that guide and control the air flow, namely ventilation facilities, in some roadways.

[0003] The most common ventilation facility in metal mines is the counter-rotating axial flow fan. When this kind of equipment is actually operating, due to the existence of a large amount of metal dust in the working environment, in order to ensure the service life and working efficiency of the equipment, it is necessary for maintenance workers to regularly maintain the internal flow fan and blades, and in necessary cases, disassembly and inspection are required. Since the casings of the counter-rotating axial flow fan are mostly fixed by large bolts, it is necessary for multiple workers to cooperate and use large lifting tools during disassembly and inspection to separate the sleeves, resulting in an extended maintenance period of the equipment, affecting the working efficiency and use convenience of the equipment. Summary of the Invention

[0004] The present invention discloses a ventilation device for underground mining in metal mines, aiming to solve the technical problem that the existing metal mine ventilation device is not convenient enough to operate during maintenance.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A ventilation device for underground mining in metal mines includes a ventilator, which is composed of an equal-diameter sleeve and a variable-diameter sleeve spliced together. An electric control flow fan is fixedly installed inside each of the equal-diameter sleeve and the variable-diameter sleeve. The two electric control flow fans are mirror-symmetrical and have opposite operating directions. An overhaul mechanism for facilitating rough maintenance by workers is arranged outside the ventilator. The overhaul mechanism includes windows symmetrically opened on the outer sides of the equal-diameter sleeve and the variable-diameter sleeve, and the windows and the electric control flow fans are symmetrically distributed in the horizontal direction; A connection mechanism for facilitating the disassembly and assembly of the ventilator by workers is arranged in the middle of the ventilator. The connection mechanism includes a plurality of pins penetrating through the adjacent ends of the equal-diameter sleeve and the variable-diameter sleeve, and a pin plate is clamped on the outer side of each pin; A moving mechanism for moving the ventilator is arranged at the bottom of the ventilator; A multi-stage push rod assembly is installed on the top of the moving mechanism; The step-by-step telescoping of the multi-stage push rod assembly drives the maintenance mechanism, the connection mechanism, and the moving mechanism to operate in sequence, facilitating the maintenance of the electric control axial flow fan by workers.

[0006] Based on the counter-rotating axial flow fan, the main body of the ventilator is composed of two parts: an equal-diameter sleeve and a variable-diameter sleeve. An additional connection mechanism is provided at the connection between the equal-diameter sleeve and the variable-diameter sleeve. At the same time, the variable-diameter sleeve is placed on top of the moving mechanism. The multi-stage push rod assembly drives the connection mechanism and the moving mechanism to operate, realizing the rapid disassembly, installation, and migration of the equal-diameter sleeve and the variable-diameter sleeve, thus facilitating the maintenance of the electric control axial flow fan inside by workers. In addition, a maintenance mechanism is provided outside the equal-diameter sleeve and the variable-diameter sleeve, facilitating the maintenance of the motor assembly of the electric control axial flow fan by workers, thereby greatly improving the convenience and efficiency during the maintenance of traditional ventilators.

[0007] In a preferred solution, the maintenance mechanism further includes a flap rotatably installed outside each window. A locking member is horizontally fixed to the side of the flap, and a locking plate is slidably sleeved outside the locking member.

[0008] By providing a window structure outside the equal-diameter sleeve and the variable-diameter sleeve, the flap outside the window is limited by the engagement relationship between the locking member and the locking plate. When the locking member loses the engagement connection with the locking plate, the flipped flap can expose the window, ensuring that when workers maintain the motor part of the electric control axial flow fan, it is not necessary to disassemble the entire ventilator, thereby improving the maintenance efficiency.

[0009] In a preferred solution, the connection mechanism further includes a locking platform slidably installed outside the variable-diameter sleeve, and the locking platform is slidably engaged outside several pin plates.

[0010] By providing several groups of pin plate structures at the connection between the equal-diameter sleeve and the variable-diameter sleeve, the equal-diameter sleeve and the variable-diameter sleeve are preliminarily connected by pins. With the engagement of the pin plates and the shielding of the locking platform, the stability after the connection of the equal-diameter sleeve and the variable-diameter sleeve is improved by horizontal and vertical misalignment fixing, while facilitating disassembly and installation during maintenance.

[0011] In a preferred solution, the moving mechanism includes a base fixed to the ground. A moving platform is slidably installed on the top of the base. A base is fixed to the top of the moving platform by bolts, and the variable-diameter sleeve is erected on the top of the base.

[0012] By erecting the variable-diameter sleeve on the top of the base, the additional moving platform is used to drive the disassembled variable-diameter sleeve to move horizontally, facilitating workers to enter the inside of the variable-diameter sleeve to maintain the electric control axial flow fan.

[0013] In a preferred embodiment, the multi-stage push rod assembly includes electric cylinders symmetrically installed on both sides of the top of the base platform. The end of the electric cylinder is electrically connected in sequence with a first-class push rod, a second-class push rod, and a third-class push rod. The bottom of the third-class push rod is fixedly connected to the locking plate, the bottom of the second-class push rod is fixedly connected to the locking table, and the first-class push rod is connected through the base.

[0014] By providing a multi-stage push rod assembly, the third-class push rod is connected to the locking plate, the second-class push rod is connected to the locking table, and the first-class push rod is connected to the base. By the contraction of the three types of push rods respectively, the maintenance mechanism, the connection mechanism, and the moving mechanism are driven to operate, thereby ensuring the perfection of the operation of this equipment.

[0015] In a preferred embodiment, connecting rods and connecting pipes are horizontally fixed to the adjacent surfaces of the two flap plates respectively. The connecting rod and the connecting pipe are sleeved and fixed to associate the two flap plates. A magnetic attraction groove is formed on the side surface of the locking table, and the flipped connecting rod and connecting pipe are adsorbed and fixed inside the magnetic attraction groove.

[0016] By providing connecting rods and connecting pipes to associate the two flap plates, synchronous locking of the two flap plates is achieved. At the same time, by using the quick connection of the connecting rods, connecting pipes, and magnetic attraction grooves, the flipped flap plates are fixed, thereby improving the convenience of this equipment during use.

[0017] As can be seen from the above, a metal underground mining ventilation device provided by the present invention has the following technical effects.

[0018] First: Based on the contra-rotating axial-flow fan, the main body of the ventilator is composed of an equal-diameter sleeve and a variable-diameter sleeve. Window structures are arranged on the outer sides of the equal-diameter sleeve and the variable-diameter sleeve. The flap on the outside of the window is limited by the engagement relationship between the locking member and the locking plate. When the locking member loses the engagement connection with the locking plate, the flipped flap can expose the window. By using the window directly facing the motor part of the electric control flow fan, it is ensured that when workers perform maintenance on the motor part, the entire ventilator does not need to be disassembled, thereby improving the maintenance efficiency.

[0019] Second: By providing several groups of pin plate structures at the connection between the equal-diameter sleeve and the variable-diameter sleeve, the equal-diameter sleeve and the variable-diameter sleeve are initially connected by the mutual cooperation of the pins and the threaded grooves. With the longitudinal engagement of the pin plates and the lateral occlusion of the locking table, the stability of the connection between the equal-diameter sleeve and the variable-diameter sleeve is improved by using horizontal and vertical misalignment fixation. At the same time, when performing maintenance on the blade part of the electric control flow fan, the equal-diameter sleeve and the variable-diameter sleeve can be disassembled and assembled more conveniently, thereby greatly improving the maintenance efficiency.

[0020] Thirdly, the reducing sleeve is installed on the top of the base, and the additionally provided moving platform is used to drive the removed reducing sleeve to move horizontally, so as to provide space for workers to enter the interior of the reducing sleeve to overhaul the electric control flow fan. Additionally, a multi-stage push rod assembly is arranged on the top of the base. The contraction of the three types of push rods, the two types of push rods and the one type of push rod are respectively used to drive the locking plate, the locking table and the moving platform to operate, so as to perform multi-stage regulation on this equipment according to the overhaul needs, improving the functionality and convenience of this equipment during use. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure proposed by the present invention.

[0022] Figure 2 It is a cross-sectional view of the internal structure of the ventilator proposed by the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the overhaul mechanism proposed by the present invention.

[0024] Figure 4 It is a schematic diagram of the state of the locking plate during operation proposed by the present invention.

[0025] Figure 5 Proposed by the present invention Figure 4 The enlarged view of the structure at A in

[0026] Figure 6 It is a schematic diagram of the state of the moving platform during operation proposed by the present invention.

[0027] Figure 7 It is a schematic diagram of the structure of the connection mechanism proposed by the present invention.

[0028] Figure 8 It is an exploded view of the structure of the moving mechanism proposed by the present invention.

[0029] In the figure: 1. Ventilator; 101. Equal-diameter sleeve; 102. Reducing sleeve; 103. Electric control flow fan; 104. Threaded groove; 2. Overhaul mechanism; 201. Window; 202. Flap; 203. Connecting rod; 204. Connecting pipe; 205. Locking member; 206. Locking plate; 207. Magnetic attraction groove; 3. Connection mechanism; 301. Plug; 302. Plug plate; 303. Locking table; 304. Locking groove; 4. Moving mechanism; 401. Base platform; 402. Moving platform; 403. Base; 4011. Pad platform; 4012. Guide rail; 5. Multi-stage push rod assembly; 501. Electric control cylinder; 502. First type of push rod; 503. Second type of push rod; 504. Third type of push rod. Detailed Embodiment

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0031] A ventilation device for underground mining of metals disclosed in the present invention is mainly applied to the scenario when the contra-rotating axial flow fan is disassembled and inspected.

[0032] Refer to Figures 1 to 8 , a ventilation device for underground mining of metals, comprising a ventilator 1, the ventilator 1 is spliced by an equal-diameter sleeve 101 and a variable-diameter sleeve 102, an electric control flow fan 103 is fixedly installed inside each of the equal-diameter sleeve 101 and the variable-diameter sleeve 102, the two electric control flow fans 103 are mirror-symmetrical and have opposite running directions, a maintenance mechanism 2 for facilitating rough maintenance by workers is arranged outside the ventilator 1, the maintenance mechanism 2 includes windows 201 symmetrically opened on the outside of the equal-diameter sleeve 101 and the variable-diameter sleeve 102, and the windows 201 and the electric control flow fans 103 are symmetrically distributed along the horizontal direction; a connection mechanism 3 for facilitating the disassembly and assembly of the ventilator 1 by workers is arranged in the middle of the ventilator 1, the connection mechanism 3 includes a plurality of pins 301 penetrating through the adjacent ends of the equal-diameter sleeve 101 and the variable-diameter sleeve 102, and a pin plate 302 is clamped outside each pin 301; a moving mechanism 4 for moving the ventilator 1 is arranged at the bottom of the ventilator 1; a multi-stage push rod assembly 5 is installed on the top of the moving mechanism 4; by the stepwise telescoping of the multi-stage push rod assembly 5, the maintenance mechanism 2, the connection mechanism 3 and the moving mechanism 4 are driven to operate in sequence, so as to facilitate the maintenance of the electric control flow fan 103 by workers.

[0033] In this embodiment: During use, the equal-diameter sleeve 101 of the ventilator 1 is docked with the ventilation duct inside the mine. At the same time, two electronically controlled flow fans 103 are started, and the operating directions of the two electronically controlled flow fans 103 are opposite. Air enters through the stepped sleeve 102 and is provided with energy by one electronically controlled flow fan 103, and then is pressurized by the other set of electronically controlled flow fans 103 and conveyed into the mine interior from the equal-diameter sleeve 101. Along with the extension of the use time, when workers need to repair the electronically controlled flow fans 103 inside the ventilator 1; when the repair part is the motor part of the electronically controlled flow fan 103 (repairing some positions of the electronically controlled flow fan 103), at this time, the multi-stage push rod assembly 5 performs a first-level contraction, causing the repair mechanism 2 to lose its locking, exposing the window 201. Workers repair the motor part of the electronically controlled flow fan 103 inside the ventilator 1 through the window 201; when the repair part is the entire electronically controlled flow fan 103, at this time, the multi-stage push rod assembly 5 performs a second-level contraction, causing the connection mechanism 3 to operate and release the connection between the equal-diameter sleeve 101 and the stepped sleeve 102. At the same time, the multi-stage push rod assembly 5 performs a third-level contraction. During the contraction, the moving mechanism 4 is driven to operate, and the moving mechanism 4 synchronously drives the stepped sleeve 102 to move horizontally, thereby exposing the port. At this time, workers enter the interiors of the equal-diameter sleeve 101 and the stepped sleeve 102 to repair the two electronically controlled flow fans 103.

[0034] Referring to Figure 1 , Figures 3 to 4 , Figure 6 , in a preferred embodiment, the repair mechanism 2 further includes a flap 202 rotatably installed on the outside of each window 201. A locking member 205 is horizontally fixed on the side of the flap 202, and a locking plate 206 is slidably sleeved on the outside of the locking member 205.

[0035] When a worker needs to repair the electric control flow fan 103 inside the ventilator 1; when the repair part is the motor part of the electric control flow fan 103 (repairing some positions of the electric control flow fan 103), at this time, the multi-stage push rod assembly 5 performs a first-level contraction, causing the locking plate 206 to move horizontally. After the movement, the locking plate 206 will disengage from the engaging relationship with the locking member 205. At this time, the flap 202 loses the extrusion restriction. The worker holds the flap 202 and pushes it upward, causing the flap 202 to flip and expose the window 201. The worker repairs the motor part of the electric control flow fan 103 inside the ventilator 1 through the window 201; wherein, connecting rods 203 and connecting pipes 204 are horizontally fixed on the adjacent surfaces of the two flaps 202 respectively. The connecting rod 203 and the connecting pipe 204 are sleeved and fixed, so that the two flaps 202 are associated. After the movement, the locking plate 206 will disengage from the engaging relationship with the locking member 205. At this time, the two flaps 202 will synchronously lose the extrusion restriction. The worker holds the flap 202 and pushes it upward, causing the two flaps 202 to flip upward synchronously. And a magnetic attraction groove 207 is formed on the side surface of the locking platform 303. The flipped connecting rod 203 and connecting pipe 204 are adsorbed and fixed inside the magnetic attraction groove 207, so as to fix the two flaps 202, facilitating the worker to repair through the window 201.

[0036] Refer to Figures 1 to 2 、 Figures 4 to 8 In a preferred embodiment, the connection mechanism 3 further includes a locking platform 303 slidably installed on the outer side of the variable-diameter sleeve 102. The locking platform 303 is slidably engaged with the outer sides of a plurality of pin plates 302.

[0037] When the repair part is the entire electric control flow fan 103, at this time, the multi-stage push rod assembly 5 performs a second-level contraction, causing the locking platform 303 to move horizontally, moving away from the outer side of the docking part of the variable-diameter sleeve 102 and the equal-diameter sleeve 101, and exposing the pin plates 302 inside the locking platform 303. At this time, the worker sequentially removes a plurality of pin plates 302, and at the same time pulls out the pins 301 inside the pin plates 302, thereby releasing the fixed connection between the equal-diameter sleeve 101 and the variable-diameter sleeve 102; wherein, a plurality of threaded grooves 104 are symmetrically formed at the ends of the equal-diameter sleeve 101 and the variable-diameter sleeve 102. The pins 301 are horizontally inserted into the threaded grooves 104 to fix the connection between the equal-diameter sleeve 101 and the variable-diameter sleeve 102. And a plurality of locking grooves 304 are evenly formed inside the locking platform 303. Each pin plate 302 is correspondingly engaged inside a locking groove 304.

[0038] Furthermore, it should be supplemented and explained that: butter is applied between the pin plates 302 and the pins 301 to increase the friction between the pin plates 302 and the pins 301.

[0039] Refer to Figures 1 to 2 、Figure 4 , Figure 6 , Figure 8 , in a preferred embodiment, the moving mechanism 4 includes a base 401 fixed to the ground. A moving platform 402 is slidably mounted on the top of the base 401. A base 403 is fixed to the top of the moving platform 402 by bolts. The variable-diameter sleeve 102 is mounted on the top of the base 403.

[0040] After releasing the fixed connection between the equal-diameter sleeve 101 and the variable-diameter sleeve 102, at this time, the multi-stage push rod assembly 5 performs a three-stage contraction. While contracting, it drives the base 403 to move, causing the moving platform 402 to move horizontally along the top of the base 401. While moving, it will synchronously drive the variable-diameter sleeve 102 on the top of the base 403 to move horizontally, thereby exposing the ports of the variable-diameter sleeve 102 and the equal-diameter sleeve 101. The specific state is as Figure 6 shown. At this time, the worker directly enters the interiors of the equal-diameter sleeve 101 and the variable-diameter sleeve 102 to repair the two electric control flow fans 103. Among them, a cushion platform 4011 is provided at the end of the base 401. The end of the moved variable-diameter sleeve 102 will be placed on the top of the cushion platform 4011, thereby ensuring the structural stability of the variable-diameter sleeve 102.

[0041] Furthermore, it is supplemented and explained that: a guide rail 4012 is provided on the top of the base 401, and the moving platform 402 is slidably connected to the top of the guide rail 4012.

[0042] Referring to Figures 1 to 2 , Figure 4 , Figure 6 , Figure 8 , in a preferred embodiment, the multi-stage push rod assembly 5 includes electric control cylinders 501 symmetrically mounted on both sides of the top of the base 401. An electric connection is sequentially made between the ends of the electric control cylinders 501 and a first-class push rod 502, a second-class push rod 503, and a third-class push rod 504. The bottom of the third-class push rod 504 is fixedly connected to the locking plate 206, the bottom of the second-class push rod 503 is fixedly connected to the locking table 303, and the first-class push rod 502 is connected through the base 403.

[0043] When the worker repairs the interior of the ventilator 1, the electric control cylinder 501 is started. The third-class push rod 504 first contracts. While contracting, it drives the locking plate 206 to move horizontally. The second-class push rod 503 contracts. While contracting, it drives the locking table 303 to move horizontally. The first-class push rod 502 finally contracts. While contracting, it drives the base 403 to move.

[0044] Working principle: When workers need to repair the electric control flow fan 103 inside the ventilator 1; when the repair part is the motor part of the electric control flow fan 103 (repairing some positions of the electric control flow fan 103), at this time, the electric control cylinder 501 starts, and the three types of push rods 504 first contract. While contracting, they drive the locking plate 206 to move horizontally. After moving, the locking plate 206 will disengage from the engaging relationship with the locking member 205. At this time, the flap 202 loses the extrusion restriction. The worker holds the flap 202 and pushes it upward, causing the two flaps 202 to flip upward synchronously, so that the flipped connecting rod 203 and the connecting pipe 204 are adsorbed and fixed inside the magnetic attraction groove 207, thereby fixing the two flaps 202. The worker performs the repair through the window 201; When the repair part is the entire electric control flow fan 103, at this time, the two types of push rods 503 contract, causing the locking platform 303 to move horizontally, moving away from the outside of the butt joint of the reduced-diameter sleeve 102 and the equal-diameter sleeve 101, so that the pin plate 302 inside the locking platform 303 is exposed. At this time, the worker sequentially removes several pin plates 302, and at the same time pulls out the pins 301 located inside the threaded groove 104, thereby releasing the fixed connection between the equal-diameter sleeve 101 and the reduced-diameter sleeve 102; at this time, the one type of push rod 502 finally contracts. While contracting, it drives the base 403 to move, causing the moving table 402 to move horizontally along the top of the base 401. While moving, it will synchronously drive the reduced-diameter sleeve 102 on the top of the base 403 to move horizontally, thereby exposing the ports of the reduced-diameter sleeve 102 and the equal-diameter sleeve 101. The specific state is as Figure 6 shown. At this time, the worker directly enters the inside of the equal-diameter sleeve 101 and the reduced-diameter sleeve 102 to repair the two electric control flow fans 103.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A metal mine underground mining ventilation device, comprising a ventilator (1), wherein the ventilator (1) is formed by splicing a sleeve of equal diameter (101) and a sleeve of reduced diameter (102) together, wherein an electric-controlled air blower (103) is fixedly installed inside each of the sleeves of equal diameter (101) and the sleeves of reduced diameter (102), wherein the two electric-controlled air blowers (103) are mirror-symmetrical and run in opposite directions, and wherein: The outside of the ventilator (1) is provided with a maintenance mechanism (2) for workers to perform rough maintenance, the maintenance mechanism (2) comprising windows (201) symmetrically opened on the outsides of the equal-diameter sleeve (101) and the reducing sleeve (102), the windows (201) and the electrically controlled flow fan (103) being symmetrically distributed in the horizontal direction; A connection mechanism (3) is provided in the middle of the ventilator (1) to facilitate workers to disassemble and assemble the ventilator (1), the connection mechanism (3) comprising a plurality of latches (301) penetrating the equal-diameter sleeve (101) and the proximal end of the reducing sleeve (102), and a pin plate (302) is engaged with the outer side of each latch (301); A moving mechanism (4) for moving the ventilator (1) is provided at the bottom of the ventilator (1); A multi-stage push rod assembly (5) is installed on the top of the moving mechanism (4); The multi-stage push rod assembly (5) is extended and retracted in steps to drive the inspection mechanism (2), the connection mechanism (3) and the moving mechanism (4) to operate in sequence, thereby facilitating workers to inspect and repair the electric-controlled flow fan (103).

2. A metal mine underground mining ventilation device according to claim 1, characterized in that: The inspection mechanism (2) further comprises a flap (202) rotatably mounted on the outer side of each window (201), a locking component (205) being horizontally fixed on the side of the flap (202), and a locking plate (206) being slidably sleeved on the outer side of the locking component (205).

3. A metal mine underground mining ventilation device according to claim 2, characterized in that: The connection mechanism (3) further comprises a locking platform (303) slidably mounted on the outside of the reducing sleeve (102), and the locking platform (303) is slidably engaged with the outsides of a plurality of the pin plates (302).

4. A metal mine underground mining ventilation device according to claim 3, characterized in that: The moving mechanism (4) comprises a base (401) fixed on the ground, a moving platform (402) is slidably mounted on the top of the base (401), a base (403) is fixed to the top of the moving platform (402) by bolts, and the reducing sleeve (102) is mounted on the top of the base (403).

5. A metal mine underground mining ventilation device according to claim 4, characterized in that: The multi-stage push rod assembly (5) includes an electric control cylinder (501) symmetrically installed on both sides of the top of the base (401), and the ends of the electric control cylinder (501) are electrically connected to a first-class push rod (502), a second-class push rod (503) and a third-class push rod (504) in sequence, the third-class push rod (504) is fixedly connected to the bottom of the locking plate (206), the second-class push rod (503) is fixedly connected to the bottom of the locking platform (303), and the first-class push rod (502) is connected to the base (403).

6. A metal mine underground mining ventilation device according to claim 5, characterized in that: A connecting rod (203) and a connecting tube (204) are respectively fixed horizontally to the adjacent surfaces of the two flaps (202); the connecting rod (203) and the connecting tube (204) are sleeved and fixed to connect the two flaps (202); a magnetic suction groove (207) is provided on the side of the locking platform (303); the turned connecting rod (203) and the connecting tube (204) are adsorbed and fixed inside the magnetic suction groove (207).

7. The metal mine underground mining ventilation device according to claim 1, characterized in that: A plurality of thread grooves (104) are symmetrically formed at the ends of the equal-diameter sleeve (101) and the reducing sleeve (102), and the latch pin (301) is horizontally inserted into the interior of the thread groove (104), thereby fixedly connecting the equal-diameter sleeve (101) and the reducing sleeve (102).

8. The metal mine underground mining ventilation device according to claim 3, characterized in that: A plurality of locking grooves (304) are evenly arranged inside the locking platform (303), and each of the pin plates (302) is correspondingly engaged with the inside of one of the locking grooves (304).

9. A metal mine underground mining ventilation device according to claim 4, characterized in that: A support platform (4011) is provided at the end of the base platform (401), and the end of the reducing sleeve (102) is placed on the top of the support platform (4011).

10. The metal mine underground mining ventilation device according to claim 4, characterized in that: A guide rail (4012) is provided on the top of the base (401), and the moving platform (402) is slidably connected to the top of the guide rail (4012).

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