CN113914917A

CN113914917A - Ventilation device for coal mine

Info

Publication number: CN113914917A
Application number: CN202111177445.3A
Authority: CN
Inventors: 王存飞; 张立辉; 刘建宇; 李健; 尚国银; 邢真强; 郭佳策
Original assignee: Shendong Coal Branch of China Shenhua Energy Co Ltd; Guoneng Shendong Coal Group Co Ltd
Current assignee: Shendong Coal Branch of China Shenhua Energy Co Ltd; Guoneng Shendong Coal Group Co Ltd
Priority date: 2021-10-09
Filing date: 2021-10-09
Publication date: 2022-01-11
Anticipated expiration: 2041-10-09
Also published as: CN113914917B

Abstract

The application provides a ventilation unit for coal mine, and it includes the ventilation pipe of tube-shape, sets up be in be used for adjusting in the inner chamber of ventilation pipe the adjusting part of the through-flow area of ventilation pipe, and be used for actuating the adjusting part function is in order to adjust the actuating part of the through-flow area of ventilation pipe, through set up adjusting part in the ventilation pipe, can the controllability change the through-flow area of ventilation pipe, and then realize that the amount of wind of the air flow in the inner chamber of ventilation pipe is adjustable.

Description

Ventilation device for coal mine

Technical Field

The invention belongs to the technical field of coal mines, and particularly relates to a ventilation device for a coal mine.

Background

Coal mines are mainly coal-rich mining areas, generally coal mines need to be excavated into underground excavation roadways, which are underground coal mines, and alternatively, the surface soil layer is directly peeled off to excavate the coal mines, which are open pit coal mines. In the process of mining a coal mine, a ventilation device is needed, which is beneficial to keeping the gas flow work in the internal space of the coal mine, but the existing ventilation device for the coal mine still has the following problems;

after the coal mine ventilation device is fixedly installed, the proper adjustment work of the flowing air quantity of the internal air cannot be effectively carried out.

Therefore, a ventilation device for coal mines, which can regulate and control the air volume, needs to be designed so as to solve the above mentioned problems.

Disclosure of Invention

The invention provides a ventilation device for a coal mine, which aims at solving part or all of the technical problems in the prior art. The ventilation device for the coal mine can effectively and properly adjust the flowing air quantity of the internal air.

According to the present invention there is provided a ventilation apparatus for a coal mine, comprising:

a tubular ventilation pipe, which is provided with a plurality of ventilation holes,

an adjusting assembly arranged in the inner cavity of the vent pipe and used for adjusting the flow area of the vent pipe,

an actuating assembly for actuating the adjustment assembly to operate to adjust the flow area of the vent tube.

In one embodiment, the adjustment assembly comprises:

a first plate arranged against the inner wall of the ventilation pipe, a first through hole for communication is arranged on the first plate,

a second plate which is arranged in the inner cavity of the ventilation pipe and is overlapped with the first plate in the axial direction of the ventilation pipe, a second through hole is arranged on the second plate,

wherein the actuation assembly is operable to actuate axial rotation of the second plate about the vent tube for changing the flow area of the first through hole.

In one embodiment, a plurality of second through holes having different flow areas are provided on the second plate to selectively match the first through holes.

In one embodiment, the actuation assembly comprises:

a support shaft extending in an axial direction of the vent pipe, the support shaft passing through the first plate and through the second plate with a gap therebetween and being fixed to the second plate,

a connecting shaft hermetically penetrating the vent pipe and extending to the outside,

and the transmission mechanism is arranged between the connecting shaft and the supporting shaft.

In one embodiment, the connecting shaft extends in a radial direction of the vent pipe, and the transmission mechanism has:

a first bevel gear sleeved on the supporting shaft,

and the second bevel gear is sleeved on the connecting shaft and is connected with the first bevel gear in a matching manner.

In one embodiment, a fixed block is fixedly arranged on the outer wall of the ventilation pipe, an inner groove is arranged at the outer side end of the fixed block, a rotating disc is arranged in the inner groove, the connecting shaft penetrates through the fixed block in a clearance mode and is fixedly connected with the rotating disc, and a rolling piece is arranged between the contact surface of the rotating disc and the inner groove.

In one embodiment, a limiting mechanism is arranged between the contact surfaces of the turntable and the inner groove, the limiting mechanism comprises a limiting shaft and a plurality of limiting holes arranged on the inner side wall of the turntable, and the limiting shaft is configured to selectively extend or retract towards the limiting holes.

In one embodiment, a ring groove is formed in the inner side end of the fixing block to form a step surface, the limiting shaft is used for penetrating through the step surface and the bottom wall of the inner groove, a connecting plate is fixedly arranged at the inner side end of the limiting shaft, and an elastic piece is arranged between the connecting plate and the outer wall of the ventilation pipe.

In one embodiment, support cylinders rotatably sleeved at two axial ends of the support shaft are arranged in the ventilation pipe at intervals, and the support cylinders are connected to the inner wall of the ventilation pipe through fixing rods.

In one embodiment, flanges for connection are provided on the outer walls of both axial ends of the vent pipe.

Compared with the prior art, the invention has the advantages that: through set up adjusting part in the ventilation pipe, can the controllability change the through-flow area of ventilation pipe, and then realize that the amount of wind of the air flow in the inner chamber of ventilation pipe is adjustable.

Drawings

Preferred embodiments of the present invention will be described in detail below with reference to the attached drawing figures, wherein:

FIG. 1 shows a front cross-sectional view of a ventilation unit for a coal mine according to one embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a turntable according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view of the structure from FIG. 1 at A;

FIG. 4 is a schematic top view of a fixing block according to an embodiment of the present invention;

FIG. 5 is a schematic front cross-sectional view of a second plate according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a fixing rod or the like according to an embodiment of the present invention;

fig. 7 is a schematic side view of a second board according to an embodiment of the present invention.

In the drawings, like parts are provided with like reference numerals. The figures are not drawn to scale.

Detailed Description

In order to make the technical solutions and advantages of the present invention more apparent, exemplary embodiments of the present invention are described in further detail below with reference to the accompanying drawings. It is clear that the described embodiments are only a part of the embodiments of the invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

The embodiment of the invention provides a ventilation device for a coal mine. As shown in fig. 1 to 7, a ventilation apparatus for a coal mine comprises a ventilation pipe 1, an adjustment assembly and an actuation assembly. The ventilation pipe 1 is cylindrical, and two axial ends of the ventilation pipe are respectively connected to a pipeline for ventilation of a coal mine and used for air circulation. The adjusting assembly is arranged in the inner cavity of the ventilation pipe 1 and is used for adjusting the flow area of the ventilation pipe 1, so that the ventilation quantity of air circulation passing through the inner cavity of the ventilation pipe 1 is changed. The actuating assembly is used to actuate the adjustment assembly to operate for the purpose of adjusting the flow area of the vent tube 1. From this, this application is through setting up the adjusting part in ventilation pipe 1, can the controllability change ventilation pipe 1's through-flow area, and then realize that the air flow's in the inner chamber of ventilation pipe 1 amount of wind is adjustable.

In one particular embodiment, the adjustment assembly includes a first plate 23 and a second plate 19. Wherein the peripheral wall of the first plate 23 is arranged in abutment with the inner wall of the ventilation tube 1 and the peripheral wall of the first plate 23 is fixed to the inner wall of the ventilation tube 1. As shown in fig. 6, a first through hole 24 for communication is provided on the first plate 23. During ventilation, air flows through the first through-hole 24 in the interior of the ventilation tube 1. The second plate 19 is disposed in the interior of the ventilation tube 1 and is stacked on the first plate 23 in the axial direction of the ventilation tube 1. The second plate 19 is provided with a second through hole. The actuation assembly can actuate the second plate 19 to rotate about the axial direction of the ventilation tube 1. The second through holes change the flow area of the first through holes 24 during the rotation of the second plate 19 relative to the first plate 23, thereby achieving the effect of adjusting the air volume.

Preferably, as shown in fig. 5 and 7, a plurality of sets, for example three sets, of second through holes with different flow area sizes are provided on the second plate 19 and are respectively designated by 20, 21, 22. The width of the group of second through holes 20 on the second plate 19 is greater than the width of the group of second through holes 21, and the width of the second through holes 21 is greater than the width of the second through holes 22. In the circumferential direction, the second through holes 20, the second through holes 21, and the second through holes 22 are uniformly distributed in sequence. Meanwhile, as shown in fig. 6, the first through holes 24 on the first plate 23 are also uniformly distributed in the circumferential direction. The width of the first through-hole 24 is equal to the width of the second through-hole 20. In the process that the second plate 19 rotates relative to the first plate 23, the first through hole 24 can be aligned with the second through hole 20, the second through hole 21 and the second through hole 22 respectively, the air flow rate is controlled, and a worker can conveniently perform proper adjustment work according to requirements. For example, when the first through-hole 24 is aligned with the second through-hole 20, the flow area is maximized; and when the first through hole 24 is aligned with the second through hole 21, the flow area becomes smaller; when the first through-hole 24 is aligned with the second through-hole 22, the flow area is minimized.

As shown in fig. 5, in order to ensure the stability of the structure, the second plate 19 is embedded in the first plate 23 in the axial direction of the ventilation tube 1. That is, the first plate 23 may be a separate piece in the axial direction, with the second plate 19 being sandwiched between the two separate pieces in the axial direction. It should be noted that, during the connection process, the first plate 23 covers the peripheral wall of the second plate 19, so as to provide a positioning for the second plate 19, and to effectively prevent the excessive gas leakage. The first plate 23 of this construction serves to define and support the second plate 19.

In one embodiment, the actuation assembly comprises a support shaft 4, a connecting shaft 7 and a transmission mechanism. Wherein the support shaft 4 extends in the axial direction of the ventilation tube 1. The support shaft 4 passes through the first plate 23 with a clearance in the axial direction of the vent pipe 1. The support shaft 4 passes through the second plate 19 in the axial direction of the ventilation duct 1 and is fixed to the second plate 19. Thus, during the rotation of the support shaft 4 in the axial direction, the second plate 19 can be brought into rotation relative to the first plate 23. The connecting shaft 7 extends sealingly through the ventilation tube 1 to the outside. The transmission mechanism is arranged between the connecting shaft 7 and the supporting shaft 4 and is used for transmitting power. Preferably, the connecting shaft 7 extends in the radial direction of the ventilation tube 1. In the operation process, the staff can rotate the connecting shaft 7, and the supporting shaft 4 is driven to rotate through the transmission mechanism, so that the air flow is adjusted.

Preferably, the transmission mechanism has a first bevel gear 5, which is journalled on the supporting shaft 4, and a second bevel gear 6, which is journalled on the connecting shaft 7. The second bevel gear 6 is connected with the first bevel gear 5 in a matching way, so that the purpose of power transmission is achieved. The setting mode is simple and easy to realize, and the adjustment can be realized in a manual mode, so that the production and operation cost is reduced.

As shown in fig. 3, a fixing block 9 is fixedly provided on the outer wall of the ventilation tube 1, for example, by welding. The outer end of the fixing block (the end remote from the vent tube 1) is provided with an inner recess 26. The turntable 10 is disposed within the inner recess 26. The connecting shaft 7 penetrates through the fixing block 9 in a clearance mode to be fixedly connected with the rotary table 10, and the effective diameter of the rotary table 10 is larger than that of the connecting shaft 7. Thereby, during screwing the turntable 10, the connecting shaft 7 can be driven to rotate relative to the fixed block 9. Wherein, rolling members 11 are arranged between the contact surfaces of the turntable 10 and the inner grooves 26, for example, the rolling members 11 are round balls, and the friction between the two is changed from sliding friction to rolling friction, so as to reduce the friction force.

A spacing mechanism is provided between the interface of the turntable 10 and the inner groove 26. The limiting mechanism comprises a limiting hole 13 and a limiting shaft 14. The limiting hole 13 is disposed on an inner side wall of the rotary disk 10, and may be, for example, a plurality of holes, as shown in fig. 2. The stopper shaft 14 is configured to be selectively extended or retracted toward the stopper hole 13. After the limiting shaft 14 extends into the limiting hole 13, the position of the rotary disc 10 relative to the fixed block 9 can be limited, the rotary disc 10 is prevented from rotating relative to the fixed block 9, and the connecting shaft 7 is further limited not to rotate, so that the ventilation quantity is guaranteed not to change. When the limiting shaft 14 extends out of the limiting hole 13, the rotating disc 10 can rotate relative to the fixed block 9, and the ventilation quantity of the ventilation pipe 1 can be adjusted. The limiting holes 13 are distributed at equal angles in the circumferential direction of the rotary table 10, and the circumferential position of the rotary table 10 can be fixed by the clamping connection of the limiting holes 13 and the limiting shaft 14; meanwhile, the turntable 10 can be conveniently positioned after rotating by different angles, so that the angles of the turntable 10 after rotation can be conveniently and accurately positioned, and the phenomenon of loosening or dislocation in the follow-up process can be avoided.

A ring groove 16 is provided at the inner end of the fixing block 9 to form a stepped surface 27. The stopper shaft 14 is adapted to pass through the step surface 27 and the bottom wall of the inner groove 26 to extend toward the stopper hole 13. A connecting plate 15 is fixedly arranged at the inner end of the limit shaft 14 close to the ventilation pipe 1. Between the connecting plate 15 and the outer wall of the ventilation tube 1 an elastic element 17 is arranged. The elastic member 17 may be a spring, for example. After the spring is mounted, the connection plate 15 is abutted so that the stopper shaft 14 is inserted into the stopper hole 13. When the limit needs to be cancelled, the connecting plate 15 is pressed towards the direction of the ventilation pipe 1, and at the moment, the spring is pressed, so that the limit shaft 14 gradually withdraws from the limit hole 13. For the convenience of the worker, a force application member 18 is provided on the outer side of the connection plate 15 in the axial direction to facilitate the pressing operation of the connection plate 15. The force application part 18 can be constructed into a circular ring part, and the connecting plate 15 can be symmetrically distributed about the central line of the force application part 18, so that the connecting plate 15 can be conveniently stretched and operated through a spring, the clamping connection stability of the limiting hole 13 and the limiting shaft 14 can be improved, meanwhile, the subsequent stress is conveniently stressed and then the stretching operation is carried out, the connecting plate 15 can conveniently drive the limiting shaft 14 to slide, and the positioning releasing operation can be carried out.

A lug 12 is fixedly arranged at the outer end of the rotary disc 10 far away from the ventilation pipe 1. For example, the projection 12 may be configured as an elongated bar. The protrusion 12 can be used as an operating handle to facilitate the worker to apply force to screw the rotary disk 10.

A sealing member 8 is provided at a position where the connecting shaft 7 passes through the ventilation pipe 1, for ensuring sealing against gas leakage in the ventilation pipe 1. For example, the sealing member 8 is ring-shaped and is socket-bonded to the outer wall of the connecting shaft 7, and the outer wall of the sealing member 8 abuts against a through hole 28 provided in the fixing block 9 for passing the connecting shaft 7 therethrough, thereby performing a sealing function.

And support cylinders 3 are arranged in the ventilation pipe 1 at intervals. The supporting shaft 4 is sleeved into the supporting cylinder 3 with gaps at two axial ends, and the supporting shaft 4 can rotate relative to the supporting cylinder 3. The support shaft 4 is supported and limited by the support cylinder 3. The support cylinder 3 is connected to the inner wall of the ventilation tube 1 by a fixing rod 2. In order to secure the stability of the support cylinder 3, as shown in fig. 6, a plurality of fixing rods 2, for example, four, are provided in the circumferential direction. The two ends of each fixed rod 2 are respectively welded on the inner wall of the ventilation pipe 1 and the outer wall of the supporting cylinder 3.

As shown in fig. 1, flanges 29 for connection are provided on outer walls of both axial ends of the ventilation pipe 1 for easy connection with other pipes.

The working principle of the ventilation device for coal mines is described in detail below with reference to fig. 1 to 7.

Firstly, the worker can fasten the ventilation pipe 1 to a pipe of a ventilation zone of a coal mine for setting the ventilation device to the pipe. The ventilation tube 1 can be conveniently connected to the duct of the ventilation zone, for example, by means of a flange 29. After the communication, the air flow is caused to flow through the ventilation tube 1, so that the air flow is caused to flow through the first through-hole 24 defined by the second through-hole.

When the staff needs to adjust the flow of the air flow in the ventilation pipe 1, the force application part 18 can be manually pressed, so that the force application part 18 drives the connecting plate 15 to slide in the annular groove 16, and the connecting plate 15 pushes the elastic part 17 to shrink. Meanwhile, the connecting plate 15 drives the limiting shaft 14 to slide and separate relative to the limiting hole 13, and positioning work on the rotary table 10 is removed. Then, the rotary table 10 is manually rotated through the projection 12, so that the rotary table 10 is rotated in the inner groove 26 on the fixed block 9 through the balls, and the rotary table 10 drives the connecting shaft 7 to rotate.

The connecting shaft 7 drives the supporting shaft 4 to rotate on the supporting cylinder 3 through the second bevel gear 6 and the first bevel gear 5, so that the supporting shaft 4 drives the second plate 19 to rotate inside the first plate 23, the angle position of the second plate 19 in the first plate 23 is conveniently adjusted, the second through

holes

20, 21 and 22 in the second plate 19 are favorably aligned with or separated from the first through hole 24, and the subsequent air flow flowing inside is conveniently controlled. For example, the worker can perform accurate positioning work through the convex block 12 and the identification scale marks on the fixed block 9, so that the adjustment of the angle position is conveniently controlled and determined;

after the adjusting turntable 10 is in place, the force application member 18 is manually released, so that the connecting plate 15 is pushed by the elastic force of the elastic member 17 to perform reset operation. The connecting plate 15 drives the limiting shaft 14 to be inserted into the limiting hole 13 again for clamping and positioning, the position of the rotary table 10 is limited again, the phenomenon that the rotary table rotates in the process of ventilation subsequently is avoided, and the overall stability is improved.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to be construed to include preferred embodiments and all such changes and/or modifications as fall within the scope of the invention, and all such changes and/or modifications as are made to the embodiments of the present invention are intended to be covered by the scope of the invention.

Claims

1. A ventilation device for a coal mine, comprising:

2. A ventilation apparatus for a coal mine according to claim 1, wherein the adjustment assembly comprises:

3. A ventilation apparatus for a coal mine according to claim 2, wherein a plurality of said second through holes of different flow areas are provided in said second plate to selectively match said first through holes.

4. A ventilation apparatus for a coal mine according to claim 3, wherein the actuation assembly comprises:

5. A ventilation device for a coal mine according to claim 4, wherein the connecting shaft extends in a radial direction of the ventilation tube, and the transmission mechanism has:

a first bevel gear sleeved on the supporting shaft,

6. A ventilation device for a coal mine according to claim 4 or 5, wherein a fixed block is fixedly arranged on the outer wall of the ventilation pipe, an inner groove is arranged at the outer side end of the fixed block, a rotary disc is arranged in the inner groove, the connecting shaft passes through the fixed block in a clearance mode and is fixedly connected with the rotary disc, and a rolling piece is arranged between the contact surface of the rotary disc and the inner groove.

7. A ventilation device for a coal mine according to claim 6, wherein a spacing mechanism is provided between the contact surfaces of the turntable and the inner groove, the spacing mechanism comprising a spacing shaft and a plurality of spacing holes provided on an inner side wall of the turntable, the spacing shaft being configured to be selectively extendable or retractable toward the spacing holes.

8. The ventilation device for the coal mine as claimed in claim 7, wherein a ring groove is formed at an inner end of the fixing block to form a stepped surface, the stopper shaft is adapted to pass through the stepped surface and a bottom wall of the inner groove, a connecting plate is fixedly provided at the inner end of the stopper shaft, and an elastic member is provided between the connecting plate and an outer wall of the ventilation pipe.

9. The ventilation device for the coal mine as claimed in any one of claims 4 to 8, wherein support cylinders rotatably sleeved at both axial ends of the support shaft are spacedly arranged in the ventilation pipe, and the support cylinders are connected to the inner wall of the ventilation pipe through fixing rods.

10. A ventilation unit for a coal mine according to any one of claims 1 to 9, wherein flanges for connection are provided on the outer walls of both axial ends of the ventilation pipe.