Mine mining underground ventilation device

Abstract

The invention relates to the technical field of mining underground ventilation, in particular to a mining underground ventilation device which comprises a main exhaust pipeline, and an opening and closing air door is provided with blades through a shaft body. A supporting telescopic rod is installed on the inner wall of the branch pipeline, a moving frame is installed at one end of the supporting telescopic rod, a sliding groove is formed in the outer wall of one side of the moving frame, a sliding connecting rod is connected into the sliding groove in a semi-embedded mode, and one end of the sliding connecting rod is movably connected with one side of a blade through a pin shaft; a self-locking assembly is arranged between the fixed end of the supporting telescopic rod and the outer wall of one side of the movable frame, and through the arrangement of the self-locking assembly, automatic locking of the blades in the closed state is achieved through the adsorption effect of a magnetic suction plate on a connecting shaft body of a first connecting rod and a second connecting rod; the problem that the air door is opened accidentally due to the fact that a traditional thread or buckle fixing mode is prone to loosening under the impact of airflow is solved, and the sealing reliability and the operation safety of the air door under the complex working condition of a mining mine are remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underground mining ventilation, in particular to an underground mining ventilation device. BACKGROUND

[0002] The fundamental task of underground mining ventilation is to continuously transport fresh air from the ground to each work site underground, dilute and discharge fumes, gas, dust and residual heat, and maintain the oxygen concentration within a safe range.

[0003] When underground mining ventilation is performed, some areas need to be closed when no work is performed, so as to ensure the ventilation efficiency of the main pipeline and other branch pipelines. The existing closing device opens and closes the pipeline through a damper.

[0004] The existing damper fixes the blades by screwing or buckling, so as to ensure the opening or closing state of the blades. However, such fixing method may cause loosening of the damper blades due to vibration when the air flows, and finally the fixation of the blades is cancelled, which affects the use of the damper as a cylinder opening and closing tool in underground mining, and the ventilation efficiency of the main ventilation pipeline is affected if the damper is accidentally opened, which reduces the ventilation effect of other areas. SUMMARY

[0005] This section aims to summarize some aspects of the embodiments of the present application and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract and title of the specification to avoid obscuring the purpose of this section, abstract and title, and such simplifications or omissions cannot be used to limit the scope of the present application.

[0006] In view of the above-mentioned problem that the damper may be loosened and opened, the present application is proposed.

[0007] Therefore, the purpose of the present application is to provide an underground mining ventilation device.

[0008] To solve the above technical problems, the present application provides the following technical scheme: an underground mining ventilation device, comprising a main exhaust pipeline, the main exhaust pipeline is connected with a branch pipeline, the terminal of the branch pipeline is provided with an opening and closing damper, the opening and closing damper is provided with a blade through a shaft body; The inner wall of the branch pipeline is provided with a supporting telescopic rod, one end of the supporting telescopic rod is provided with a moving frame, a sliding groove is formed in one side of the outer wall of the moving frame, a sliding link is semi-embeddedly connected in the sliding groove, one end of the sliding link is movably connected with one side of the blade through a pin shaft, and a self-locking assembly is arranged between the fixed end of the supporting telescopic rod and one side of the outer wall of the moving frame.

[0009] As a preferred scheme of the mining underground ventilation device, the self-locking assembly comprises a first connecting rod installed on the outer wall of the moving frame, a second connecting rod installed on the bottom of the supporting telescopic rod, and a spring member installed between the first connecting rod and the second connecting rod, and the two ends of the spring member are movably sleeved on one side of the second connecting rod and the first connecting rod.

[0010] As a preferred scheme of the mining underground ventilation device, the bottom of the supporting telescopic rod is provided with a magnetic plate, the magnetic plate is displaced along with the movement of the supporting telescopic rod, when the first connecting rod and the second connecting rod are bent to a horizontal line, the connecting shaft body of the first connecting rod and the second connecting rod is close to one side of the magnetic plate, the connecting shaft body is made of ferromagnetic metal, the connecting shaft body is attracted by the magnetic plate to generate upward displacement, the top of the branch pipeline is provided with a pressing unlocking plate, and the pressing point of the pressing unlocking plate is located on one side of the top of the first connecting rod.

[0011] As a preferred scheme of the mining underground ventilation device, the bottom of the supporting telescopic rod is provided with a magnetic plate, the magnetic plate is displaced along with the movement of the supporting telescopic rod, when the first connecting rod and the second connecting rod are bent to a horizontal line, the connecting shaft body of the first connecting rod and the second connecting rod is close to one side of the magnetic plate, the connecting shaft body is made of ferromagnetic metal, the connecting shaft body is attracted by the magnetic plate to generate upward displacement, the top of the branch pipeline is provided with a pressing unlocking plate, and the pressing point of the pressing unlocking plate is located on one side of the top of the first connecting rod.

[0012] As a preferred scheme of the mining underground ventilation device, the blades are provided with three groups in the opening and closing air door, one side of the shaft body of the three groups of blades is provided with a linkage rod body, one side of the linkage rod body is provided with a pushing member, the outer wall of the opening and closing air door is provided with a supporting rail plate, and the supporting rail plate supports and guides the pushing member.

[0013] As a preferred scheme of the mining underground ventilation device, one side of the cover plate is provided with a pushing connecting plate, the outer wall of the pushing connecting plate is provided with a grid, the two sides of the grid are provided with end plates, and the outer wall of the main exhaust pipeline is provided with a scraping and cleaning assembly.

[0014] As a preferred scheme of the mining underground ventilation device, the grid is located on the air outlet side of the branch pipeline, and a through groove is formed in the main exhaust pipeline, and the size of the through groove is matched with the size of the end plate.

[0015] As a preferred scheme of the mining underground ventilation device, the inner bottom wall of the main exhaust pipeline is provided with a slag discharging frame, the bottom of the slag discharging frame is provided with a shielding plate, the top of the shielding plate is provided with a fixing rod, the top of the fixing rod is provided with a triangular plate, and the triangular plate is located on one side of the moving path of the pushing connecting plate.

[0016] As a preferred scheme of the mining underground ventilation device, wherein: the spring is arranged between the baffle and the slag discharge frame, the spring tightly abuts the baffle at the bottom end of the slag discharge frame, and the slag discharge frame is located at the closing end side of the pushing connecting plate, so that the sundries and dust pushed by the pushing connecting plate can be pushed into the slag discharge frame.

[0017] As a preferred scheme of the mining underground ventilation device, wherein: the scraping cleaning assembly comprises a supporting plate installed on the outer wall of the main exhaust pipeline, a supporting spring is installed on the outer wall of the supporting plate, and an inclined scraper is installed at one end of the supporting spring, and the inclined scraper is movably connected with the supporting plate through a pin shaft.

[0018] Beneficial effects Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects: I. By arranging the self-locking assembly and using the magnetic attraction plate to adsorb the first connecting rod and the second connecting rod, the automatic locking of the blade closed state is realized, the problems that the traditional threaded or buckle fixing mode is easy to loosen under the impact of air flow and causes the air door to be accidentally opened are avoided, and the sealing reliability and operation safety of the air door under the complex working conditions of the mining underground are significantly improved. II. By arranging the cover plate and the grid structure in linkage, the two ends of the branch pipeline are automatically closed when the air door is closed, the grid is driven out of the main exhaust passage, the obstruction of the grid to the main air flow in the non-use state is reduced, the sundries are automatically collected and discharged, the grid is automatically cleaned back and forth, the ventilation efficiency is effectively maintained, the maintenance frequency is reduced, and the mining ventilation system is particularly suitable for the underground mining with large dust and poor environment. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creating labor.

[0020] Figure 1 It is a whole schematic view of a mining underground ventilation device.

[0021] Figure 2 It is a self-locking assembly schematic view of a mining underground ventilation device.

[0022] Figure 3 It is a blade schematic view of a mining underground ventilation device.

[0023] Figure 4 It is a cover plate schematic view of a mining underground ventilation device.

[0024] Figure 5A schematic view of an inclined scraper of a mining underground ventilation device.

[0025] Fig. 1 is a schematic view of an inclined scraper of a mining underground ventilation device. Fig. 2 is a schematic view of an inclined scraper of a mining underground ventilation device. Fig. 3 is a schematic view of an inclined scraper of a mining underground ventilation device. DETAILED DESCRIPTION

[0026] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0027] In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, it will be apparent to one skilled in the art that the present application can be practiced without the specific details given herein. In other instances, well-known methods have not been described in detail in order to avoid obscuring the present application. Therefore, the specific details set forth hereinafter are merely exemplary and should not be construed as limiting the scope of the present application.

[0028] Secondly, the "one embodiment" or "embodiment" referred to herein means that the specific features, structures or characteristics can be included in at least one implementation of the present application. The "in one embodiment" appearing in different places in the specification does not mean the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments.

[0029] Thirdly, the present application is described in detail in conjunction with the schematic view. In the detailed description of the embodiments of the present application, the sectional view of the device structure is partially enlarged without the general proportion for the convenience of description, and the schematic view is only an example which should not limit the scope of protection of the present application. In addition, the three-dimensional spatial dimensions including length, width and depth should be included in the actual manufacture.

[0030] Reference Signs List Figures 1-5For an embodiment of the present application, the embodiment provides a mining underground ventilation device, which comprises a main exhaust duct 1, the main exhaust duct 1 is connected with a branch duct 11, the terminal end of the branch duct 11 is installed with an opening and closing air door 12, the opening and closing air door 12 is installed with a blade 13 through a shaft body, the inner wall of the branch duct 11 is installed with a supporting telescopic rod 2, one end of the supporting telescopic rod 2 is installed with a moving frame 21, the outer wall of one side of the moving frame 21 is provided with a sliding groove 22, the inside of the sliding groove 22 is semi-embeddedly connected with a sliding connecting rod 23, one end of the sliding connecting rod 23 is movably connected with one side of the blade 13 through a pin shaft, a self-locking assembly 24 is arranged between the fixed end of the supporting telescopic rod 2 and the outer wall of one side of the moving frame 21, when working in the working area, three groups of blades 13 are in an open state, at this time, the grating 51 is completely embedded in the inner wall of the main exhaust duct 1, and the end plate 52 blocks the area penetrated, the air in the working area flows into the main exhaust duct 1 from the branch duct 11, the sundries possibly brought in by the branch duct 11 are blocked by the grating 51, when the area is not working, three groups of blades 13 are closed, the blade 13 moves to drive the moving frame 21 to move, the moving frame 21 moves to drive the first connecting rod 241 and the second connecting rod 242 to move, so that the first connecting rod 241 and the second connecting rod 242 gradually tend to be horizontal, and at this time, the moving frame 21 also moves to the closed side of the blade 13. When the magnetic attraction plate 244 generates adsorption at the connecting shaft of the first connecting rod 241 and the second connecting rod 242, the bending trend of the first connecting rod 241 and the second connecting rod 242 changes from downward to upward, and at this time, the upward bending trend is limited by the magnetic attraction plate 244 on the top side and the supporting telescopic rod 2, so that the moving frame 21 is locked by the first connecting rod 241 and the second connecting rod 242 which are bent and turned at this time. At this time, three groups of blades 13 are automatically locked after closing the port of the opening and closing air door 12, so that it is no longer necessary to manually thread-lock the actuating piece 41, and the loosening of the ordinary locking due to shaking to cause the air duct to open is avoided.

[0031] Specifically, the self-locking assembly 24 comprises a first connecting rod 241 installed on the outer wall of the moving frame 21, a second connecting rod 242 installed at the bottom of the supporting telescopic rod 2, a spring piece 243 installed between the first connecting rod 241 and the second connecting rod 242, and the two ends of the spring piece 243 are movably sleeved on one side of the second connecting rod 242 and the first connecting rod 241, respectively. The spring piece 243 restores the first connecting rod 241 and the second connecting rod 242 to a v shape, and the spring piece 243 also restricts the blade 13 to maintain the maximum opening and closing angle. When the area is not working, three groups of blades 13 are closed, the blade 13 moves to drive the moving frame 21 to move, the moving frame 21 moves to drive the first connecting rod 241 and the second connecting rod 242 to move, so that the first connecting rod 241 and the second connecting rod 242 gradually tend to be horizontal, and at this time, the moving frame 21 also moves to the closed side of the blade 13.

[0032] Further, the bottom of the supporting telescopic rod 2 is provided with a magnetic plate 244, which is displaced with the movement of the supporting telescopic rod 2. When the first connecting rod 241 and the second connecting rod 242 are bent to a horizontal line, the connecting shaft body of the first connecting rod 241 and the second connecting rod 242 is close to one side of the magnetic plate 244. The connecting shaft body is made of ferromagnetic metal, and is attracted by the magnetic plate 244 to produce upward displacement. The top of the branch pipeline 11 is provided with a pressing unlocking plate 245, and the pressing point of the pressing unlocking plate 245 is located on one side of the top of the first connecting rod 241. When the magnetic plate 244 is attracted to the connecting shaft of the first connecting rod 241 and the second connecting rod 242, the bending trend of the first connecting rod 241 and the second connecting rod 242 changes from downward to upward, and at this time the upward bending trend is limited by the magnetic plate 244 on the top side and the supporting telescopic rod 2. Further, the moving frame 21 is locked by the first connecting rod 241 and the second connecting rod 242 which are bent and turned at this time. At this time, the three groups of blades 13 complete automatic locking by closing the port of the opening and closing air door 12, so that artificial screw locking of the shifting member 41 is no longer needed, and the loosening of the ordinary locking due to shaking to cause the air duct to open is avoided. When the blades 13 need to be opened again, the pressing unlocking plate 245 is touched, and the pressing unlocking plate 245 applies a downward force to the first connecting rod 241, so that the first connecting rod 241 and the second connecting rod 242 restore the downward bending trend.

[0033] Further, the bottom of the supporting telescopic rod 2 is provided with a magnetic plate 244, which is displaced with the movement of the supporting telescopic rod 2. When the first connecting rod 241 and the second connecting rod 242 are bent to a horizontal line, the connecting shaft body of the first connecting rod 241 and the second connecting rod 242 is close to one side of the magnetic plate 244. The connecting shaft body is made of ferromagnetic metal, and is attracted by the magnetic plate 244 to produce upward displacement. The top of the branch pipeline 11 is provided with a pressing unlocking plate 245, and the pressing point of the pressing unlocking plate 245 is located on one side of the top of the first connecting rod 241.

[0034] Further, the blades 13 are provided with three groups in the opening and closing air door, and the shaft body of the three groups of blades 13 is provided with a linkage rod body 4. One side of the linkage rod body 4 is provided with a shifting member 41. The outer wall of the opening and closing air door is provided with a supporting rail plate 42, which supports and guides the shifting member 41.

[0035] Further, one side of the cover plate 31 is provided with a pushing connecting plate 5, the outer wall of the pushing connecting plate 5 is provided with a grid 51, both sides of the grid 51 are provided with end plates 52, the outer wall of the main exhaust pipeline 1 is provided with a scraping cleaning assembly 53, when the cover plate 31 moves, the cover plate 31 synchronously drives the grid 51 on one side to move, when the branch pipeline 11 exhausts, the grid 51 mainly blocks the sundries of the branch pipeline 11, and can also block the sundries that may be missed at the front end, and when the branch pipeline 11 is closed, the grid 51 moves out of the main exhaust pipeline 1, so that when the branch is not used, the grid 51 reduces the blocking of the exhaust airflow, thereby ensuring the exhaust efficiency of the main exhaust pipeline 1.

[0036] Further, the grid 51 is located at the air outlet side of the branch pipeline 11, and the main exhaust pipeline 1 is provided with a through groove, the size of the through groove is matched with the size of the end plate 52.

[0037] Further, the inside bottom wall of the main exhaust pipeline 1 is provided with a slag discharging frame 6, the bottom of the slag discharging frame 6 is provided with a shutter 63, the top of the shutter 63 is provided with a fixed rod 61, the top of the fixed rod 61 is provided with a triangular plate 62, and the triangular plate 62 is located at one side of the moving path of the pushing connecting plate 5.

[0038] Further, a spring is arranged between the shutter 63 and the slag discharging frame 6, the spring tightly abuts the shutter 63 at the bottom end of the slag discharging frame 6, the slag discharging frame 6 is located at one side of the closing end of the pushing connecting plate 5, the sundries and dust pushed by the pushing connecting plate 5 can be pushed into the slag discharging frame 6, when the grid 51 moves, the pushing connecting plate 5 scrapes the sundries on one side that are not attached to the grid 51 into the slag discharging frame 6, and when the pushing plate presses the triangular plate 62, the shutter 63 is opened downward, so that the accumulated sundries in the slag discharging frame 6 can fall, and then the spring reseals the shutter 63 on the slag discharging frame 6.

[0039] Further, the scraping cleaning assembly 53 comprises a supporting plate 531 arranged on the outer wall of the main exhaust pipeline 1, the outer wall of the supporting plate 531 is provided with a supporting spring 532, one end of the supporting spring 532 is provided with an inclined scraper 533, and the inclined scraper 533 and the supporting plate 531 are movably connected through a pin shaft.

[0040] Operation process: the opening and closing of the air door 12, branch pipeline 11 and main exhaust pipeline 1 form a exhaust channel, when working in a certain work area, three groups of blades 13 are in the open state, at this time the grid 51 is completely embedded in the inner wall of the main exhaust pipeline 1, and the end plate 52 blocks the through area, at this time the air in the work area flows into the main exhaust pipeline 1 from the branch pipeline 11, the sundries that the branch pipeline 11 may bring are blocked by the grid 51, when the work area is not working, three groups of blades 13 are closed, the movement of the blade 13 drives the movement of the moving frame 21, the movement of the moving frame 21 drives the movement of the first connecting rod 241 and the second connecting rod 242, so that the first connecting rod 241 and the second connecting rod 242 gradually tend to be horizontal, and at this time the moving frame 21 also moves to the side of the closed blade 13, when the magnetic plate 244 generates adsorption at the connecting shaft of the first connecting rod 241 and the second connecting rod 242, the bending trend of the first connecting rod 241 and the second connecting rod 242 changes from downward to upward, and at this time the upward bending trend is limited by the magnetic plate 244 on the top side and the supporting telescopic rod 2, so that the moving frame 21 is locked by the first connecting rod 241 and the second connecting rod 242 which have been bent and turned at this time, at this time the three groups of blades 13 complete the automatic locking of the closure of the port of the opening and closing air door 12, so that it is no longer necessary to manually lock the knob 41, and the ordinary locking may be loose due to shaking, which may cause the air duct to open, and at the same time of the movement of the moving frame 21, the moving frame 21 moves the extension connecting rod 3 and the cover plate 31, at the same time of the closure of the blade 13 to the opening and closing air door 12, the cover plate 31 also synchronously shields the opening end of the branch pipeline 11 and the main exhaust pipeline 1, so that both ends of the branch pipeline 11 are closed, which effectively improves the closing effect and greatly reduces the influence of the branch pipeline 11 on the exhaust airflow of the main exhaust pipeline 1;When the cover plate 31 moves, the cover plate 31 synchronously drives the side grating 51 to move, when the branch pipeline 11 exhausts, the grating 51 mainly blocks the sundries of the branch pipeline 11, and can also block the sundries that may be missed at the front end, when the branch pipeline 11 is closed, the grating 51 moves out of the main exhaust pipeline 1, so that when the branch is not used, the grating 51 reduces the blocking of the exhaust airflow, thereby ensuring the exhaust efficiency of the main exhaust pipeline 1, when the grating 51 moves, the push plate 5 pushes the sundries that are not attached to the grating 51 to the slag discharging frame 6, and when the push plate presses the triangular plate 62, the shutter 63 opens downward, so that the accumulated material of the slag discharging frame 6 can fall, then the spring reseals the shutter 63 on the slag discharging frame 6, when the branch pipeline 11 restores the exhaust, the grating 51 moves into the main exhaust pipeline 1, the inclined scraper 533 pressed by the supporting spring 532 of the grating 51 exerts a scraping force on the moving grating 51, so that the blocking surface of the grating 51 is cleaned by the inclined scraper 533, when the grating 51 moves to the outside of the main exhaust pipeline 1, the inclined scraper 533 is inclined and supported by the supporting spring 532, so that the movement of the grating 51 to the outside is not affected by the inclined scraper 533, thereby the grating 51 can be reciprocally used, and each time it is used, the grating 51 can be cleaned by itself, the air permeability of the grating 51 is maintained, and the use effect of the ventilation device in the underground mine is improved.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalent, without departing from the spirit and scope of the technical solutions of the present application, which should be covered in the scope of the claims of the present application.

Claims

1. A ventilation device for underground mining operations, characterized in that, include: The main exhaust pipe (1) is connected to a branch pipe (11), and the branch pipe (11) is equipped with an opening and closing damper (12) at its end. The opening and closing damper (12) is equipped with blades (13) through a shaft. The inner wall of the branch pipe (11) is equipped with a support telescopic rod (2). One end of the support telescopic rod (2) is equipped with a movable frame (21). A groove (22) is opened on one side of the outer wall of the movable frame (21). A sliding connecting rod (23) is semi-embedded inside the groove (22). One end of the sliding connecting rod (23) is movably connected to one side of the blade (13) through a pin. A self-locking component (24) is provided between the fixed end of the support telescopic rod (2) and one side of the outer wall of the movable frame (21).

2. The underground ventilation device for mining operations according to claim 1, characterized in that: The self-locking assembly (24) includes a first connecting rod (241) installed on the outer wall of the movable frame (21), a second connecting rod (242) installed at the bottom of the support telescopic rod (2), a spring (243) installed between the second connecting rod (242) and the first connecting rod (241), and the two ends of the spring (243) are respectively movably sleeved on one side of the second connecting rod (242) and the first connecting rod (241).

3. The underground ventilation device for mining according to claim 2, characterized in that: A magnetic suction plate (244) is installed at the bottom of the support telescopic rod (2). The magnetic suction plate (244) moves with the support telescopic rod (2). When the first link (241) and the second link (242) bend to a horizontal line, the connecting shaft of the first link (241) and the second link (242) is close to the side of the magnetic suction plate (244). The connecting shaft is made of ferromagnetic metal. The connecting shaft is attracted by the magnetic suction plate (244) and produces an upward displacement. A press-to-unlock plate (245) is installed at the top of the branch pipe (11). The pressing point of the press-to-unlock plate (245) is located on the top side of the first link (241).

4. The underground ventilation device for mining operations according to claim 3, characterized in that: An extension rod (3) is installed on one side of the movable frame (21). One end of the extension rod (3) extends into the interior of the main exhaust pipe (1), and a cover plate (31) is installed at the extension end of the extension rod (3).

5. The underground ventilation device for mining according to claim 4, characterized in that: The blades (13) are arranged in three sets inside the opening and closing damper (12). The shaft of the three sets of blades (13) is provided with a linkage rod (4), and a toggle piece (41) is installed on one side of the linkage rod (4). A support rail plate (42) is installed on the outer wall of the opening and closing damper (12). The support rail plate (42) plays a supporting and guiding role for the toggle piece (41).

6. The underground ventilation device for mining operations according to claim 5, characterized in that: A push plate (5) is installed on one side of the cover plate (31), a grille (51) is installed on the outer wall of the push plate (5), end plates (52) are installed on both sides of the grille (51), and a scraping cleaning assembly (53) is installed on the outer wall of the main exhaust pipe (1).

7. The underground ventilation device for mining according to claim 6, characterized in that: The grille (51) is located on the air outlet side of the branch pipe (11), and the main exhaust pipe (1) is provided with a through groove, the size of which is matched with the size of the end plate (52).

8. The underground ventilation device for mining according to claim 7, characterized in that: The main exhaust pipe (1) has a slag discharge frame (6) installed on its inner bottom wall. The bottom of the slag discharge frame (6) is provided with a cover plate (63). The top of the cover plate (63) is provided with a fixing rod (61). The top of the fixing rod (61) is provided with a triangular plate (62). The triangular plate (62) is located on one side of the moving path of the push connecting plate (5).

9. The underground ventilation device for mining operations according to claim 8, characterized in that: A spring is provided between the cover plate (63) and the slag discharge frame (6). The spring holds the cover plate (63) tightly against the bottom of the slag discharge frame (6). The slag discharge frame (6) is located on the closed side of the push plate (5), which can push the debris and dust pushed by the push plate (5) into the slag discharge frame (6).

10. The underground ventilation device for mining according to claim 6, characterized in that: The scraping cleaning assembly (53) includes a support plate (531) installed on the outer wall of the main exhaust pipe (1), a support spring (532) installed on the outer wall of the support plate (531), an inclined scraper (533) installed at one end of the support spring (532), and the inclined scraper (533) and the support plate (531) are movably connected by a pin.

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