CN219733443U - Ventilation device for coal mine - Google Patents
Ventilation device for coal mine Download PDFInfo
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- CN219733443U CN219733443U CN202321275762.3U CN202321275762U CN219733443U CN 219733443 U CN219733443 U CN 219733443U CN 202321275762 U CN202321275762 U CN 202321275762U CN 219733443 U CN219733443 U CN 219733443U
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- ventilation
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- 238000009423 ventilation Methods 0.000 title claims abstract description 134
- 239000003245 coal Substances 0.000 title claims abstract description 43
- 230000005540 biological transmission Effects 0.000 claims abstract description 67
- 239000000428 dust Substances 0.000 claims abstract description 49
- 238000004140 cleaning Methods 0.000 claims abstract description 31
- 238000005065 mining Methods 0.000 description 5
- 230000001681 protective effect Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model relates to a ventilation device for a coal mine, which comprises a ventilation device main body, a dustproof net arranged at the air inlet end of the ventilation device main body, a cleaning brush used for cleaning dust on the dustproof net, and a cleaning brush arranged in the ventilation device main body, wherein the dustproof net is arranged along the vertical direction; the reciprocating screw rod is in transmission connection with the cleaning brush and is rotationally connected in the ventilation device main body; the sliding rod is connected with the cleaning brush in a sliding way and is arranged in an extending way along the left-right direction; the fan is rotatably arranged in the ventilation device main body and can rotate around the horizontal direction; the fan is connected with the reciprocating screw rod in a transmission way. The utility model drives the fan to rotate through wind entering the ventilation device main body so as to drive the reciprocating screw rod to rotate, thereby enabling the cleaning brush to move along the left-right direction so as to clean dust on the dust screen and prevent the dust screen from being blocked.
Description
Technical Field
The utility model relates to the technical field of ventilation, in particular to a ventilation device for a coal mine.
Background
Coal mines are areas where coal resources are mined by mankind in mining areas rich in coal, and are generally divided into an underground coal mine and an open pit coal mine, when a coal seam is far from the ground surface, coal is generally selected to be mined into underground mining roadways, the underground coal mine is generally selected to be mined by directly stripping off earth surface soil layers when the coal seam is very close to the ground surface, the open pit coal mine is the most part of the coal mines in China, the coal mines comprise overground underground and large areas of related facilities, the coal mines are reasonable spaces which are mined by mankind when mining geological layers rich in coal, generally comprise roadways, underground coal, mining surfaces and the like, the coal is the most dominant solid fuel, is one of combustible organic rocks, is a large plant grown in a certain geological period, gradually accumulates into a thick layer in a proper geological environment, and is formed by natural coal mining actions of a long geological period and is buried in water bottom or sediment.
Because more dust exists on the coal mine, the existing ventilation device is easy to cause the blockage of the dust screen in the use process, the ventilation effect of the ventilation device is reduced after long-time use, and more inconvenience is brought to the work.
Accordingly, there is a need for a ventilation device that can clean a dust screen.
Disclosure of Invention
First, the technical problem to be solved
In view of the above-mentioned shortcomings and disadvantages of the prior art, the present utility model provides a ventilation device for coal mine, which solves the technical problem that the dust screen of the ventilation device for coal mine in the prior art is easy to be blocked by dust.
(II) technical scheme
In order to achieve the above purpose, the main technical scheme adopted by the utility model comprises the following steps:
the utility model provides a ventilation unit for colliery, includes ventilation unit main part and installs in the dust screen of the air inlet end of ventilation unit main part, the dust screen is arranged along vertical direction, still includes the cleaning brush that is used for clearing up the dust on the dust screen, the cleaning brush can be along perpendicular to ventilation unit main part axis's direction reciprocating motion install in ventilation unit main part in order to clear up the dust screen;
one end of the cleaning brush is in threaded connection with a reciprocating screw rod, and the reciprocating screw rod is rotationally connected in the ventilation device main body so as to enable the cleaning brush to reciprocate;
the other end of the cleaning brush is connected with the sliding rod in a sliding way, and the reciprocating screw rod and the sliding rod are arranged in parallel;
the fan is rotatably arranged in the ventilation device main body, can rotate around the horizontal direction and is in transmission connection with the reciprocating screw rod
Wind blows the fan to rotate so as to drive the reciprocating screw rod to rotate.
Preferably, the fan comprises a fan body, a reciprocating screw rod and a first transmission shaft, wherein the reciprocating screw rod is arranged on the outer side of the fan body, the first transmission shaft is rotatably arranged on the outer side of the fan body, the axial direction of the first transmission shaft is parallel to the reciprocating screw rod, the first transmission shaft can rotate around the axial direction of the first transmission shaft, and the first transmission shaft penetrates through the fan body through a first belt and is in transmission connection with the reciprocating screw rod.
Preferably, the ventilation device further comprises a second transmission shaft rotatably mounted on the outer side of the ventilation device main body;
the axial direction of the second transmission shaft extends along the horizontal direction, one end of the first transmission shaft penetrates through the ventilation device main body through a second belt to be in transmission connection with the fan, and a first bevel gear is arranged at the other end of the first transmission shaft;
the first transmission shaft is provided with a second bevel gear meshed with the first bevel gear.
Preferably, the air quantity adjusting device is arranged in the ventilation device main body and used for adjusting the ventilation quantity of the ventilation device for the coal mine.
Preferably, the air quantity adjusting device comprises an adjusting plate which is arranged in the ventilation device main body;
the adjusting plate can rotate around the vertical direction so as to adjust the gap between the left end and the right end of the adjusting plate and the ventilation device main body.
Preferably, the air quantity adjusting device further comprises a rotating shaft, the rotating shaft is mounted in the middle of the adjusting plate, two ends of the rotating shaft are rotatably connected with the ventilation device main body, and the axial direction of the rotating shaft extends along the vertical direction;
one end of the rotating shaft extends out of the ventilation device main body and is in transmission connection with a rotary driver;
the rotary actuator is mounted on the outside of the ventilation device body.
Preferably, the rotary driver is a servo motor.
Preferably, the ventilation device further comprises a driving shaft, wherein one end of the driving shaft is rotatably connected with the ventilation device main body, and the other end of the driving shaft is connected with a handle;
the driving shaft is in transmission connection with the rotating shaft through a third belt.
Preferably, the ventilation device main body is provided with a placing groove, and the dust screen can pass through the placing groove and be clamped in the ventilation device main body.
(III) beneficial effects
The beneficial effects of the utility model are as follows:
(1) The utility model drives the fan to rotate through wind entering the ventilation device main body so as to drive the reciprocating screw rod to rotate, thereby enabling the cleaning brush to move along the left-right direction so as to clean dust on the dust screen and prevent the dust screen from being blocked.
(2) The utility model can adjust the gap between the adjusting plate and the ventilation device main body by rotating the adjusting plate, thereby adjusting the ventilation quantity of the ventilation device for the coal mine.
Drawings
FIG. 1 is a schematic view of the overall structure of a ventilation device for coal mines according to the present utility model;
FIG. 2 is a schematic view of the internal structure of the ventilation device for coal mine according to the present utility model;
FIG. 3 is a schematic view of a partial structure of a ventilation device for coal mine according to the present utility model;
FIG. 4 is a schematic view of a partial structure of a ventilation device for coal mine according to the present utility model;
FIG. 5 is an enlarged schematic view at A in FIG. 1;
FIG. 6 is an enlarged schematic view at B in FIG. 3;
fig. 7 is a schematic diagram showing a combination of the first transmission shaft, the second transmission shaft and the fan according to the present utility model.
[ reference numerals description ]
1: a ventilation device body; 2: a dust screen; 3: a hand-pulled groove; 4: a placement groove; 5: a first belt hole; 6: a second belt hole; 7: a fixing plate; 8: a fan shaft; 9: a fan; 10: a third pulley; 11: a second belt; 12: a second drive shaft; 13: a support plate; 14: a first bevel gear; 15: a second bevel gear; 16: a first drive shaft; 17: a first pulley; 18: a first belt; 19: a reciprocating screw; 20: a handle; 21: a connecting plate; 22: a slide bar; 23: cleaning brushes; 24: an adjusting plate; 25: a rotating shaft; 26: a fourth pulley; 27: a third belt; 28: a fixing seat; 29: a rotary driver; 30: a drive shaft.
Detailed Description
The utility model will be better explained by the following detailed description of the embodiments with reference to the drawings. Referring to fig. 2, the axial direction of the slide bar 22 is defined as a "left-right direction", the axial direction of the fan shaft 10 is defined as a "horizontal direction", and the axial direction of the rotation shaft 25 is defined as a "vertical direction".
Examples
As shown in fig. 1 to 7, a ventilation device for coal mine comprises a ventilation device main body 1 and a dust screen 2 arranged at an air inlet end of the ventilation device main body 1, wherein the dust screen 2 is arranged in the ventilation device main body 1 and is arranged along a vertical direction, the ventilation device main body 1 is of a cuboid structure, and a ventilation cavity is arranged in the ventilation device main body 1 for air supply to pass through. The dust-cleaning device further comprises a cleaning brush 23 for cleaning dust on the dust screen 2, and the cleaning brush 23 can be mounted in the ventilation cavity in a reciprocating manner along the direction perpendicular to the axis of the ventilation device main body 1 so as to clean the dust screen 2. One end of the cleaning brush 23 is in threaded connection with the reciprocating screw 19, the reciprocating screw 19 is rotatably connected in the ventilation device main body 1 so as to enable the cleaning brush 23 to reciprocate, the other end of the cleaning brush 23 is in sliding connection with the sliding rod, and the reciprocating screw 19 and the sliding rod 22 are arranged in parallel. The fan 9 is rotatably installed in the ventilation device main body 1 and can rotate around the horizontal direction, and is in transmission connection with the reciprocating screw 19 to blow the fan 9 to rotate so as to drive the reciprocating screw 19 to rotate. The fan 9 is in transmission connection with the reciprocating screw rod 19, the slide bar 22, the cleaning brush 23 and the reciprocating screw rod 19 are all arranged on one side of the dust screen 2 and are arranged at the air inlet end of the ventilation device main body 1, and the fan 9 is arranged on the other side of the dust screen 2 and is arranged at the air exhaust side of the dust screen 2. The fan 9 corresponds with the dust screen 2, and the wind passes through the dust screen 2 and gets into in the ventilation unit main part 1 to drive fan 9 rotation, fan 9 drive reciprocating screw 19 and rotate, and reciprocating screw 19 drives cleaning brush 23 along slide bar 22 reciprocating motion in order to clear up dust screen 2, prevents dust blocking up the mesh of dust screen 2, influences ventilation effect of ventilation unit for the colliery.
The fan 9 includes a fan shaft 8, two fixing plates 7 are installed in the ventilation device main body 1, and two ends of the fan shaft 8 are respectively connected with the two fixing plates 7 in a rotating manner.
The reciprocating screw 19 in this embodiment is the prior art, on which two thread grooves with the same pitch and opposite rotation directions are formed, and two ends are connected by a transition curve, and the reciprocating screw 19 can make the cleaning brush 23 implement reciprocating motion on the premise of not changing the rotation direction.
As shown in fig. 3 and 6-7, further, the ventilation device further comprises a first transmission shaft 16 and a second transmission shaft 12, wherein the first transmission shaft 16 and the second transmission shaft 12 are both installed on the outer side of the ventilation device main body 1, the first transmission shaft 16 is rotationally connected with the ventilation device main body 1, the axial direction of the first transmission shaft 16 is parallel to the reciprocating screw rod 19, the first transmission shaft 16 can rotate around the axial direction of the first transmission shaft 16, the first transmission shaft 16 is in transmission connection with the reciprocating screw rod 19 through a first belt 18, two connecting plates 21 are fixed on the outer side of the ventilation device main body 1, and two ends of the first transmission shaft 16 are respectively rotationally connected with the two connecting plates 21. The axial direction of the second transmission shaft 12 extends along the horizontal direction, one end of the second transmission shaft 12 is in transmission connection with the fan shaft 8 through a second belt 11, a first bevel gear 14 is arranged at the other end of the second transmission shaft, third belt wheels 10 are arranged on the fan shaft 8 and the second transmission shaft 12, and the second belt 11 is sleeved on the two third belt wheels 10. Two support plates 13 are fixed on the outer side of the ventilation device main body 1, and two ends of the second transmission shaft 12 are respectively connected with the two support plates 13 in a rotating way; the first drive shaft 16 is provided with a second bevel gear 15 which meshes with the first bevel gear 14. Specifically, the ventilation device main body 1 is provided with a first belt hole 5, and the second belt 11 passes through the first belt hole 5 and is connected with the second transmission shaft 12. In order to prevent wind from flowing to the outside of the ventilation device body 1 through the first belt hole 5, a sealing block may be installed in the first belt hole 5, the sealing block being slidably and sealingly coupled with the second belt 11. A seal case may be installed outside the first belt hole 5, and the seal case is hermetically connected to the ventilation device main body 1 and rotatably and hermetically connected to the second transmission shaft 12, so that wind in the ventilation device main body 1 is prevented from flowing out of the ventilation device main body 1 by the seal case. The ventilation device main body 1 is also provided with a second belt hole 6, both ends of the first transmission shaft 16 are provided with first belt wheels 17, and the first belt 18 passes through the second belt hole 6 and is sleeved on a second belt wheel on the reciprocating screw rod 19 to be connected. Similarly, to prevent wind in the ventilation device main body 1 from flowing out of the ventilation device main body 1 through the second belt hole 6, a protective shell can be installed on the outer side of the second belt hole 6, the second belt hole 6 is completely covered in the protective shell, and the protective shell is in sealing connection with the ventilation device main body 1 and is in rotational connection with the second transmission shaft 12.
When the dust-proof screen is used, the fan 9 drives the second transmission shaft 12 to rotate through the fan shaft 8 and the second belt 11, the second transmission shaft 12 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the second bevel gear 15 and the first transmission shaft 16 to rotate, the first transmission shaft 16 drives the reciprocating screw rod 19 to rotate through the first belt 18, and the reciprocating screw rod 19 drives the cleaning brush 23 to reciprocate along the sliding rod 22 so as to clean the dust-proof screen 2.
As shown in fig. 1 to 2 and 5, the ventilation device further comprises an air quantity adjusting device which is arranged in the ventilation device main body 1 and is used for adjusting the ventilation quantity of the ventilation device for the coal mine. The air quantity adjusting device comprises an adjusting plate 24 and a rotating shaft 25, wherein the adjusting plate 24 and the rotating shaft 25 are both installed in the ventilation device main body 1, the adjusting plate 24 can rotate around the vertical direction to adjust gaps between the left end and the right end of the adjusting plate 24 and the ventilation device main body 1, and when the adjusting plate 24 is arranged in an extending mode along the left and the right directions, gaps are reserved between the left end and the right end of the adjusting plate 24 and the ventilation device main body 1, and at the moment, no wind passes through. The rotating shaft 25 is installed in the middle of the adjusting plate 24, both ends of the rotating shaft 25 are rotatably connected with the ventilation device main body 1, and the axial direction of the rotating shaft 25 extends along the vertical direction; one end of the rotation shaft 25 extends out of the ventilation device body 1, and is connected with a rotation driver 29 in a transmission manner, and the rotation driver 29 is fixed to the outside of the ventilation device body 1 through a fixing seat 28. The rotary drive 29 is a servomotor. The rotation driver 29 drives the rotation shaft 25 to rotate, the rotation shaft 25 drives the adjusting plate 24 to rotate, and the angle of the adjusting plate 24 is adjusted to adjust the gap between the adjusting plate 24 and the ventilation device main body 1, so that the amount of the gap is changed.
As shown in fig. 1 and 5, the ventilation device further comprises a driving shaft 30 which is arranged at the outer side of the ventilation device main body 1, one end of the driving shaft 30 is rotatably connected with the ventilation device main body 1, and the other end is connected with a handle 20; the driving shaft 30 is in transmission connection with the rotating shaft 25 through a third belt 27, the driving shaft 30 and the rotating shaft 25 are both provided with a fourth belt wheel 26, and the third belt 27 is sleeved on the fourth belt wheel 26. When no electricity is supplied or the electricity is inconvenient to use, the handle 20 rotates the driving shaft 30 to rotate by manually rotating the handle 20, the driving shaft 30 drives the rotating shaft 25 to rotate by the third belt 27, and the gap between the adjusting plate 24 and the ventilation device main body 1 can be adjusted to adjust the ventilation amount of the ventilation device for the coal mine.
As shown in fig. 1, a placement groove 4 is formed in the ventilation device main body 1, and the dust screen 2 can be clamped in the ventilation device main body 1 through the placement groove 4. Specifically, the ventilation device main body 1 is internally provided with a placement table at the periphery, and the dust screen 2 is placed on the placement table to support the dust screen 2. The hand groove 3 has been seted up to the one side that dust screen 2 stretched out ventilation unit main part 1, conveniently places dust screen 2 or pulls out dust screen 2 through hand groove 3 to change dust screen 2.
In the utility model, in actual use, wind enters the ventilation device main body 1 through the dust screen 2, the dust screen 2 filters dust in the wind, the wind drives the fan 9 to rotate, the fan 9 drives the second transmission shaft 12 to rotate through the fan shaft 8 and the second belt 11, the second transmission shaft 12 drives the first bevel gear 14 to rotate, the first bevel gear 14 drives the second bevel gear 15 and the first transmission shaft 16 to rotate, the first transmission shaft 16 drives the reciprocating screw 19 to rotate through the first belt 18, and the reciprocating screw 19 drives the cleaning brush 23 to reciprocate along the sliding rod 22 so as to clean the dust screen 2. The ventilation amount of the ventilation device for the coal mine is adjusted by rotating the driver 29 or manually rotating the handle 20 to drive the rotation shaft 25 to rotate so as to adjust the gap between the adjusting plate 24 and the ventilation device main body 1.
In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium; may be a communication between two elements or an interaction between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present utility model, unless expressly stated or limited otherwise, a first feature is "on" or "under" a second feature, which may be in direct contact with the first and second features, or in indirect contact with the first and second features via an intervening medium. Moreover, a first feature "above," "over" and "on" a second feature may be a first feature directly above or obliquely above the second feature, or simply indicate that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is level lower than the second feature.
In the description of the present specification, the terms "one embodiment," "some embodiments," "examples," "particular examples," or "some examples," etc., refer to particular features, structures, materials, or characteristics described in connection with the embodiment or example as being included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that alterations, modifications, substitutions and variations may be made in the above embodiments by those skilled in the art within the scope of the utility model.
Claims (9)
1. The utility model provides a ventilation unit for colliery, includes ventilation unit main part (1) and install in dust screen (2) of the air inlet end of ventilation unit main part (1), dust screen (2) are arranged along vertical direction, its characterized in that still includes:
a cleaning brush (23) for cleaning dust on the dust screen (2), the cleaning brush (23) being reciprocally mounted in the ventilation device body (1) in a direction perpendicular to the axis of the ventilation device body (1) so as to clean the dust screen (2);
one end of the cleaning brush (23) is in threaded connection with a reciprocating screw rod (19), and the reciprocating screw rod (19) is rotatably connected in the ventilation device main body (1) so as to enable the cleaning brush (23) to reciprocate;
the other end of the cleaning brush (23) is connected with the sliding rod (22) in a sliding way, and the reciprocating screw rod (19) and the sliding rod (22) are arranged in parallel;
a fan (9) rotatably installed in the ventilation device main body (1) and capable of rotating around the horizontal direction and in transmission connection with the reciprocating screw rod (19);
wind blows the fan (9) to rotate so as to drive the reciprocating screw rod (19) to rotate.
2. A ventilation device for coal mines as claimed in claim 1, further comprising a first drive shaft (16);
the first transmission shaft (16) is rotatably arranged on the outer side of the ventilation device main body (1), the axial direction of the first transmission shaft (16) is parallel to the reciprocating screw (19), the first transmission shaft (16) can rotate around the axial direction of the first transmission shaft, and the first transmission shaft (16) passes through the ventilation device main body (1) through a first belt (18) to be in transmission connection with the reciprocating screw (19).
3. A ventilation device for coal mines according to claim 2, further comprising a second drive shaft (12) rotatably mounted to the outside of the ventilation device body (1);
the axial direction of the second transmission shaft (12) extends along the horizontal direction, one end of the second transmission shaft (12) penetrates through the ventilation device main body (1) through a second belt (11) to be in transmission connection with the fan (9), and a first bevel gear (14) is arranged at the other end of the second transmission shaft;
a second bevel gear (15) meshed with the first bevel gear (14) is arranged on the first transmission shaft (16).
4. A ventilation apparatus for coal mine as claimed in claim 1, wherein,
the air quantity adjusting device is arranged in the ventilation device main body (1) and used for adjusting the ventilation quantity of the ventilation device for the coal mine.
5. A ventilation device for coal mines according to claim 4, wherein the air quantity adjusting device comprises an adjusting plate (24) installed in the ventilation device main body (1);
the adjusting plate (24) can rotate around the vertical direction so as to adjust the gap between the left end and the right end of the adjusting plate (24) and the ventilation device main body (1).
6. The ventilation device for coal mines according to claim 5, wherein the air quantity adjusting device further comprises a rotating shaft (25), the rotating shaft (25) is installed in the middle of the adjusting plate (24), both ends of the rotating shaft (25) are rotatably connected with the ventilation device main body (1), and the axial direction of the rotating shaft (25) extends along the vertical direction;
one end of the rotating shaft (25) extends out of the ventilation device main body (1) and is connected with a rotary driver (29) in a transmission way;
a rotary actuator (29) is mounted on the outside of the ventilation device body (1).
7. A ventilation device for coal mines as claimed in claim 6, characterised in that the rotary drive (29) is a servomotor.
8. The ventilation device for coal mines according to claim 6, further comprising a driving shaft (30) installed at the outside of the ventilation device main body (1);
one end of the driving shaft (30) is rotationally connected with the ventilation device main body (1), and the other end is connected with a handle (20);
the driving shaft (30) is in transmission connection with the rotating shaft (25) through a third belt (27).
9. The ventilation device for coal mines according to claim 1, wherein a placement groove (4) is formed in the ventilation device main body (1), and the dust screen (2) can pass through the placement groove (4) to be clamped in the ventilation device main body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321275762.3U CN219733443U (en) | 2023-05-24 | 2023-05-24 | Ventilation device for coal mine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321275762.3U CN219733443U (en) | 2023-05-24 | 2023-05-24 | Ventilation device for coal mine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219733443U true CN219733443U (en) | 2023-09-22 |
Family
ID=88054877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321275762.3U Active CN219733443U (en) | 2023-05-24 | 2023-05-24 | Ventilation device for coal mine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219733443U (en) |
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2023
- 2023-05-24 CN CN202321275762.3U patent/CN219733443U/en active Active
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