Ventilation device for coal mine tunneling production

Abstract

The utility model belongs to the technical field of ventilation for coal mine tunneling production, and particularly relates to a ventilation device for coal mine tunneling production, which comprises a base, a fixed shell fixedly mounted at the top of the base, a groove formed in the top of the fixed shell, a U-shaped frame fixedly mounted in the fixed shell, and a fan body mounted in the U-shaped frame in an inserted manner. A cover plate is rotationally mounted in the groove; the fixing assembly is located on the fixing shell and used for fixing the cover plate; the two installation pipes are fixedly installed on the two sides of the fixing shell respectively, ventilation pipes are installed in the two installation pipes in a threaded mode, when the whole device is used, the draught fan body can be taken out of the fixing shell, then dust on fan blades on the draught fan body can be effectively cleaned away, and therefore dust on the fan blades on the draught fan body can be effectively removed. And the dust is prevented from affecting normal use of the fan body, in addition, a worker can conveniently and effectively clean dust on the inner walls of the two ventilation pipes and the inner wall of the fixing shell, and operation is convenient and fast.

Description

Technical Field

[0001] The utility model belongs to the technical field of ventilation for coal mine tunneling production, and particularly relates to a ventilation device for coal mine tunneling production. Background Technique

[0002] Underground coal mine workers need to breathe fresh air, and the ventilation system can transport fresh air from the ground to the tunneling face to ensure the safety of the workers' lives.

[0003] For example, the Chinese patent with the publication number of CN221195106U discloses a ventilation device for coal mine tunneling production, including a fan pipe body. One side of the fan pipe body is provided with a dust removal pipe body. An inner pipe is arranged inside the dust removal pipe body. An atomizing nozzle is installed inside the inner pipe. The top of the dust removal pipe body is connected with a water delivery pipe. One side of the water delivery pipe is connected with a water tank. One side of the water tank is connected with a water delivery pump. A dust collection bin is installed at the bottom of the dust removal pipe body. By setting a humidifying and dust collection structure, when in use, the fan inside the fan pipe body sucks the gas with dust underground into the dust removal pipe body. The water in the water delivery pump is pumped into the water delivery pipe through the water tank. The water in the water delivery pipe is sprayed out through the atomizing nozzle on the inner wall of the inner pipe inside the dust removal pipe body to wet the dust in the gas, and the wet dust is placed into the dust collection bin at the bottom of the dust removal pipe body, thereby realizing the functions of humidifying and dust collection.

[0004] The above patent has the following problems:

[0005] When the above patent is in use, there are some disadvantages, such as: after the device is used for a long time, a large amount of dust will adhere to the fan blades inside the fan in the fan pipe body, and these dusts will affect the normal use of the fan, resulting in a weakened ventilation effect. Moreover, after a long time of use, there will be a large amount of dust on the inner walls of many pipe bodies in the device, and it is not convenient for the staff to clean the inner walls of the pipe bodies. In view of this, we propose a ventilation device for coal mine tunneling production. Content of the Utility Model

[0006] The purpose of the utility model is to provide a ventilation device for coal mine tunneling production to solve the problems raised in the above background technique.

[0007] In view of this, the utility model provides a ventilation device for coal mine tunneling production, including:

[0008] A base, on the top of which a fixed shell is fixedly installed. A groove is opened on the top of the fixed shell. A U-shaped frame is fixedly installed inside the fixed shell. A fan body is inserted and installed inside the U-shaped frame. A cover plate is rotatably installed in the groove;

[0009] A fixing component, which is located on the fixing shell and is used to fix the cover plate;

[0010] Two installation pipes, which are respectively and fixedly installed on both sides of the fixing shell. Ventilation pipes are threadedly installed in both of the two installation pipes. One end of one ventilation pipe away from the fixing shell is fixedly installed with an air suction hose. A circular groove is formed in the other ventilation pipe, and an annular plate is slidably installed in the circular groove. A dust filter net and an activated carbon filter layer are fixedly installed in the annular plate;

[0011] A limiting component, which is located on the other ventilation pipe and is used to limit the annular plate.

[0012] In this technical solution, during use, after the staff places the overall device at the designated position, the staff can pull the air suction hose and place the air suction hose underground. Subsequently, the fan body can be started. When the fan body operates, it will extract the air underground. Then, the air underground will enter the air suction hose. The air in the air suction hose enters one of the ventilation pipes. The air in one of the ventilation pipes enters the fixing shell through one of the installation pipes. Then, the air in the fixing shell will be transported by the fan body to the other installation pipe. The air in the other installation pipe then enters the other ventilation pipe, so that the air will first contact the dust filter net. Then, the dust in the air will be filtered by the dust filter net, and the dust will stay in the other ventilation pipe. Then, the air will contact the activated carbon filter layer, and the activated carbon filter layer adsorbs and filters some harmful substances in the air, and then discharges it to the outside;

[0013] When it is necessary to clean the dust in the other ventilation pipe, through the set limiting component, the limiting component releases the fixation of the annular plate. Then, the annular plate can be pulled, so that the annular plate drives the dust filter net and the activated carbon filter layer to be taken out of the circular groove, and then the dust in the other ventilation pipe can be cleaned;

[0014] At the same time, the two ventilation pipes can be rotated. Under the action of the thread, the two ventilation pipes can be detached from the corresponding installation pipes, so that the inner walls of the ventilation pipes can be comprehensively cleaned, and it is convenient for the staff to clean the inner wall of the fixing shell. When it is necessary to clean the fan blades in the fan body, through the set fixing component, the fixing component releases the fixation of the cover plate. Then, the cover plate can be rotated and opened, and then the fan body can be pulled out of the U-shaped frame, so that the fan body passes through the groove and is taken out. Then, the dust on the fan blades in the fan body can be cleaned, which is more convenient.

[0015] In the above technical solution, further, the fixing component includes:

[0016] A rotating plate, which is rotatably installed on the top of the fixed shell and is located on one side of the cover plate. A first hand-tightening bolt is threadedly installed on the rotating plate and above the cover plate, and the bottom end of the first hand-tightening bolt contacts the top of the cover plate.

[0017] In this technical solution, when it is necessary to open the cover plate, the staff can rotate the first hand-tightening bolt. Under the action of the thread, the first hand-tightening bolt will rotate and move upward, so that the bottom end of the first hand-tightening bolt no longer contacts the top of the cover plate. Subsequently, rotate the rotating plate so that the first hand-tightening bolt is no longer above the cover plate. At this time, the cover plate will be released from the limit, and then the cover plate can be rotated and opened. By performing the reverse operation of the above operation, the cover plate can be closed and fixed.

[0018] In the above technical solution, further, the limiting component includes:

[0019] Two second hand-tightening bolts, both of which are threadedly installed in the annular plate. One end of the second hand-tightening bolt penetrates through the ventilation pipe and extends to the outside, and the second hand-tightening bolt is threadedly connected to the ventilation pipe.

[0020] In this technical solution, during disassembly, turn the two second hand-tightening bolts by hand. Under the action of the thread, the second hand-tightening bolts will rotate and move until the second hand-tightening bolts are displaced from the annular plate. At this time, both of the second hand-tightening bolts are displaced from the annular plate. Subsequently, the annular plate can be pulled so that the annular plate drives the dust filter net and the activated carbon filter layer to be taken out from the circular groove. During installation, the reverse operation of the above operation can be performed to complete it.

[0021] In the above technical solution, further, both of the installation pipes are communicated with the inner cavity of the fixed shell.

[0022] In this technical solution, ensure that the air in one of the installation pipes can enter the other installation pipe through the fixed shell.

[0023] In the above technical solution, further, a sealing gasket that contacts the top of the fan body is fixedly installed at the bottom of the cover plate, a second sealing ring that contacts the inner wall of the circular groove is fixedly installed on one side of the annular plate close to the fixed shell, and a first sealing ring that contacts the ventilation pipe is fixedly installed on the side of the installation pipe away from the fixed shell.

[0024] In this technical solution, ensure that the groove can be sealed; ensure that the circular groove can be sealed; ensure that the connection between the installation pipe and the ventilation pipe can be sealed.

[0025] In the above technical solution, further, the tops of the fan body and the U-shaped frame are on the same horizontal line as the bottom of the groove.

[0026] In this technical solution, it is ensured that the gasket at the bottom of the cover plate can contact the top of the fan body and the U-shaped frame, so that it can be fixed and the groove can be sealed.

[0027] In the above technical solution, further, the dust filter net is located between the fixed shell and the activated carbon filter layer.

[0028] In this technical solution, it is ensured that the dust in the air can be filtered first, and then some harmful substances in the air can be filtered.

[0029] The beneficial effects of the present utility model are:

[0030] 1. For the ventilation device used in coal mine tunneling production, through the cooperation of the fixed shell, U-shaped frame, groove, cover plate, gasket and fixing components, it is ensured that the fan body can be taken out of the fixed shell, and then the dust on the fan blades of the fan body can be effectively cleaned, ensuring that the dust on the fan blades of the fan body can be completely cleaned, and avoiding the influence of dust on the normal use of the fan body.

[0031] 2. For the ventilation device used in coal mine tunneling production, through the cooperation of the installation pipe and the ventilation pipe, it is ensured that the two ventilation pipes can be detached from the fixed shell, facilitating the staff to effectively clean the dust on the inner walls of the two ventilation pipes and the inner wall of the fixed shell, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the overall structural schematic diagram of the present utility model;

[0033] Figure 2 is the exploded structural schematic diagram of one of the ventilation pipes and the installation pipe of the present utility model;

[0034] Figure 3 is the internal structural schematic diagram of another ventilation pipe of the present utility model;

[0035] Figure 4 is the sectional structural schematic diagram of another ventilation pipe of the present utility model;

[0036] Figure 5 is one of the internal structural schematic diagrams of the fixed shell of the present utility model;

[0037] Figure 6 is the structural schematic diagram of the fixed shell of the present utility model;

[0038] Figure 7 is the second internal structural schematic diagram of the fixed shell of the present utility model;

[0039] Figure 8 is the structural schematic diagram of the cover plate and the gasket of the present utility model;

[0040] Figure 9 This is a schematic diagram of the internal structure of the annular plate in the present utility model.

[0041] The markings in the figure are indicated as:

[0042] 1. Base; 2. Fixed shell; 3. Ventilation pipe; 4. Suction hose; 5. Installation pipe; 6. Cover plate; 7. Rotating plate; 8. First hand-tightening bolt; 9. Sealing gasket; 10. First sealing ring; 11. Annular plate; 12. Dust filter net; 13. Second sealing ring; 14. Round groove; 15. U-shaped frame; 16. Fan body; 17. Groove; 18. Activated carbon filter layer; 19. Second hand-tightening bolt. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the terms used here are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but in appropriate cases, the said technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0045] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same category, and the number of objects is not limited. For example, the first object can be one or multiple. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects before and after.

[0046] It should be noted that in the description of this application, the orientation or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing this application and simplifying the description. Without contrary explanations, these directional terms do not indicate and imply that the devices or elements referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of this application; the directional terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0047] It should be noted that in this application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitations, the element defined by the statement "including one..." does not exclude the existence of additional identical elements in the process, method, article or device including that element. In addition, it should be noted that the scope of the methods and devices in the embodiments of this application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may also be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0048] Embodiment 1:

[0049] Please refer to Figure 1 - Figure 9 As shown, this embodiment provides a ventilation device for coal mine tunneling production, including:

[0050] A base 1, a fixed shell 2 is fixedly installed on the top of the base 1, a groove 17 is opened at the top of the fixed shell 2, a U-shaped frame 15 is fixedly installed inside the fixed shell 2, a fan body 16 is inserted and installed inside the U-shaped frame 15, and a cover plate 6 is rotatably installed inside the groove 17;

[0051] A fixing component, which is located on the fixed shell 2 and is used to fix the cover plate 6;

[0052] Two mounting pipes 5, the two mounting pipes 5 are respectively fixedly installed on both sides of the fixed shell 2, ventilation pipes 3 are threadedly installed inside the two mounting pipes 5, one end of one ventilation pipe 3 away from the fixed shell 2 is fixedly installed with a suction hose 4, a circular groove 14 is opened inside the other ventilation pipe 3, an annular plate 11 is slidably installed inside the circular groove 14, and a dust filter net 12 and an activated carbon filter layer 18 are fixedly installed inside the annular plate 11;

[0053] A limiting component, which is located on another ventilation pipe 3 and is used to limit the annular plate 11.

[0054] Among them, during use, after the staff place the overall device at the designated position, the staff can pull the suction hose 4 and place the suction hose 4 underground. Subsequently, the fan body 16 can be started. When the fan body 16 operates, it will extract the air underground. Then, the air underground will enter the suction hose 4. The air in the suction hose 4 enters one of the ventilation pipes 3. The air in one of the ventilation pipes 3 enters the fixed housing 2 through one of the installation pipes 5. Then, the air in the fixed housing 2 will be transported by the fan body 16 into the other installation pipe 5. The air in the other installation pipe 5 then enters the other ventilation pipe 3, so that the air will first contact the dust filter net 12. Then, the dust in the air will be filtered by the dust filter net 12, and the dust will stay in the other ventilation pipe 3. Then, the air will contact the activated carbon filter layer 18, and the activated carbon filter layer 18 adsorbs and filters some harmful substances in the air, and then discharges them to the outside.

[0055] When it is necessary to clean the dust in the other ventilation pipe 3, through the set limiting component, the limiting component releases the fixation of the annular plate 11. Subsequently, the annular plate 11 can be pulled, so that the annular plate 11 drives the dust filter net 12 and the activated carbon filter layer 18 to be taken out from the circular groove 14, and then the dust in the other ventilation pipe 3 can be cleaned.

[0056] At the same time, the two ventilation pipes 3 can be rotated. Under the action of the thread, the two ventilation pipes 3 can be detached from the corresponding installation pipes 5, so that the inner walls of the ventilation pipes 3 can be comprehensively cleaned, and it is convenient for the staff to clean the inner wall of the fixed housing 2. When it is necessary to clean the fan blades in the fan body 16, through the set fixing component, the fixing component releases the fixation of the cover plate 6. Subsequently, the cover plate 6 can be rotated and opened, and then the fan body 16 can be pulled out from the U-shaped frame 15, so that the fan body 16 passes through the groove 17 and is taken out. Subsequently, the dust on the fan blades in the fan body 16 can be cleaned, which is more convenient.

[0057] Embodiment 2:

[0058] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The fixing component includes:

[0059] A rotating plate 7, which is rotatably installed on the top of the fixed housing 2 and is located on one side of the cover plate 6. A hand-tightening bolt 8 is threadedly installed on the rotating plate 7 and above the cover plate 6. The bottom end of the hand-tightening bolt 8 contacts the top of the cover plate 6.

[0060] Among them, when it is necessary to open the cover plate 6, the staff can rotate the manual bolt one 8. Under the action of the thread, the manual bolt one 8 will rotate and move upward, so that the bottom end of the manual bolt one 8 no longer contacts the top of the cover plate 6. Subsequently, rotate the rotating plate 7 again, so that the manual bolt one 8 is no longer above the cover plate 6. At this time, the cover plate 6 will be released from the limit, and then the cover plate 6 can be rotated and opened. The cover plate 6 can be closed and fixed by performing the reverse operation of the above operation.

[0061] Embodiment 3:

[0062] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features. The limiting component includes:

[0063] Two manual bolts two 19 are both threadedly installed in the annular plate 11. One end of the manual bolt two 19 penetrates through the ventilation pipe 3 and extends to the outside, and the manual bolt two 19 is threadedly connected with the ventilation pipe 3.

[0064] Among them, when disassembling, rotate the two manual bolts two 19 by hand. Under the action of the thread, the manual bolts two 19 will rotate and displace until the manual bolts two 19 are displaced out of the annular plate 11. At this time, both of the two manual bolts two 19 are displaced out of the annular plate 11. Subsequently, the annular plate 11 can be pulled, so that the annular plate 11 drives the dust filter net 12 and the activated carbon filter layer 18 to be taken out of the round groove 14. The installation can be completed by performing the reverse operation of the above operation.

[0065] Embodiment 4:

[0066] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features. Both of the two installation pipes 5 are communicated with the inner cavity of the fixed shell 2.

[0067] Among them, it is ensured that the air in one of the installation pipes 5 can enter the other installation pipe 5 through the fixed shell 2.

[0068] Embodiment 5:

[0069] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features. A sealing gasket 9 that contacts the top of the fan body 16 is fixedly installed at the bottom of the cover plate 6. A sealing ring two 13 that contacts the inner wall of the round groove 14 is fixedly installed on one side of the annular plate 11 close to the fixed shell 2. A sealing ring one 10 that contacts the ventilation pipe 3 is fixedly installed on one side of the installation pipe 5 away from the fixed shell 2.

[0070] Among them, ensure that the groove 17 can be sealed; ensure that the circular groove 14 can be sealed; ensure that the connection between the installation pipe 5 and the ventilation pipe 3 can be sealed.

[0071] Embodiment 6:

[0072] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features: the tops of the fan body 16 and the U-shaped frame 15 are on the same horizontal line as the bottom of the groove 17.

[0073] Among them, ensure that the gasket 9 at the bottom of the cover plate 6 can contact the tops of the fan body 16 and the U-shaped frame 15, so as to be able to fix it and also seal the groove 17.

[0074] Embodiment 7:

[0075] This embodiment provides a ventilation device for coal mine tunneling production. In addition to including the technical solutions of the above embodiments, it also has the following technical features: the dust filter net 12 is located between the fixed shell 2 and the activated carbon filter layer 18.

[0076] Among them, ensure that the dust in the air can be filtered first, and then some harmful substances in the air can be filtered.

[0077] Working principle: When in use, after the staff place the whole device at the designated position, the staff can pull the suction hose 4 and place the suction hose 4 underground. Subsequently, the fan body 16 can be started. When the fan body 16 operates, it will extract the air underground. Then, the air underground will enter the suction hose 4. The air in the suction hose 4 enters one of the ventilation pipes 3. The air in one of the ventilation pipes 3 enters the fixed shell 2 through one of the installation pipes 5. Then, the air in the fixed shell 2 will be conveyed by the fan body 16 to the other installation pipe 5. The air in the other installation pipe 5 enters the other ventilation pipe 3 again, so that the air will first contact the dust filter net 12. Then, the dust in the air will be filtered by the dust filter net 12, and the dust will stay in the other ventilation pipe 3. Then, the air will contact the activated carbon filter layer 18, and the activated carbon filter layer 18 adsorbs and filters some harmful substances in the air, and then discharges them to the outside;

[0078] When it is necessary to clean the dust in another ventilation pipe 3, the staff can rotate two hand-tightening bolts II 19 by hand. Under the action of the thread, the hand-tightening bolts II 19 will rotate and displace until the hand-tightening bolts II 19 displace out of the annular plate 11. At this time, both hand-tightening bolts II 19 displace out of the annular plate 11. Subsequently, the annular plate 11 can be pulled to drive the dust filter net 12 and the activated carbon filter layer 18 to be taken out of the circular groove 14, and then the dust in the other ventilation pipe 3 can be cleaned;

[0079] At the same time, the two ventilation pipes 3 can be rotated. Under the action of the thread, the two ventilation pipes 3 can be detached from the corresponding installation pipes 5, so that the inner walls of the ventilation pipes 3 can be comprehensively cleaned, and it is convenient for the staff to clean the inner wall of the fixed shell 2. When it is necessary to clean the fan blades in the fan body 16, the staff can rotate the hand-tightening bolt I 8. Under the action of the thread, the hand-tightening bolt I 8 will rotate and displace upward, so that the bottom end of the hand-tightening bolt I 8 no longer contacts the top of the cover plate 6. Subsequently, the rotating plate 7 is rotated again so that the hand-tightening bolt I 8 is no longer above the cover plate 6. At this time, the cover plate 6 will be released from the limit, and then the cover plate 6 can be rotated and opened, and then the fan body 16 can be pulled out of the U-shaped frame 15, so that the fan body 16 passes through the groove 17 and is taken out. Subsequently, the dust on the fan blades in the fan body 16 can be cleaned, which is more convenient.

[0080] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are merely illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A ventilation device for coal mine tunneling production, characterized in that, Including: A base (1), a fixed shell (2) is fixedly installed on the top of the base (1), a groove (17) is opened on the top of the fixed shell (2), a U-shaped frame (15) is fixedly installed in the fixed shell (2), a fan body (16) is inserted and installed in the U-shaped frame (15), and a cover plate (6) is rotatably installed in the groove (17); A fixing component, which is located on the fixed shell (2) and is used to fix the cover plate (6); Two mounting pipes (5), the two mounting pipes (5) are respectively fixedly installed on both sides of the fixed shell (2), ventilation pipes (3) are threadedly installed in the two mounting pipes (5), one end of one ventilation pipe (3) far away from the fixed shell (2) is fixedly installed with a suction hose (4), a circular groove (14) is opened in the other ventilation pipe (3), an annular plate (11) is slidably installed in the circular groove (14), and a dust filter screen (12) and an activated carbon filter layer (18) are fixedly installed in the annular plate (11); A limiting component, which is located on the other ventilation pipe (3) and is used to limit the annular plate (11).

2. The ventilation device for coal mine tunneling production according to claim 1, characterized in that, The fixing component includes: A rotating plate (7), the rotating plate (7) is rotatably installed on the top of the fixed shell (2) and is located on one side of the cover plate (6), a first hand-tightening bolt (8) is threadedly installed on the rotating plate (7) and above the cover plate (6), and the bottom end of the first hand-tightening bolt (8) contacts the top of the cover plate (6).

3. A ventilation device for coal mine tunneling production according to claim 1, characterized in that, The limiting component includes: Two second hand-tightening bolts (19), the two second hand-tightening bolts (19) are both threadedly installed in the annular plate (11), one end of the second hand-tightening bolt (19) penetrates through the ventilation pipe (3) and extends to the outside, and the second hand-tightening bolt (19) is threadedly connected with the ventilation pipe (3).

4. A ventilation device for coal mine tunneling production according to claim 1, characterized in that Both of the two mounting pipes (5) are communicated with the inner cavity of the fixed shell (2).

5. A ventilation device for coal mine tunneling production according to claim 1, characterized in that, A sealing gasket (9) which contacts the top of the fan body (16) is fixedly installed at the bottom of the cover plate (6), a second sealing ring (13) which contacts the inner wall of the circular groove (14) is fixedly installed on one side of the annular plate (11) close to the fixed shell (2), and a first sealing ring (10) which contacts the ventilation pipe (3) is fixedly installed on one side of the mounting pipe (5) far away from the fixed shell (2).

6. The ventilation device for coal mine tunneling production according to claim 1, characterized in that, The tops of the fan body (16) and the U-shaped frame (15) are on the same horizontal line as the bottom of the groove (17).

7. The ventilation device for coal mine tunneling production according to claim 1, characterized in that, The dust filter screen (12) is located between the fixed shell (2) and the activated carbon filter layer (18).

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