CN211768901U

CN211768901U - Dry type drilling coal dust pneumatic conveyor for soft coal seam

Info

Publication number: CN211768901U
Application number: CN202020198003.1U
Authority: CN
Inventors: 李培波; 韩晓明; 李永林; 李国栋; 李学成; 李钊; 千志科; 周磊
Original assignee: Henan University of Technology
Current assignee: Henan University of Technology
Priority date: 2020-02-24
Filing date: 2020-02-24
Publication date: 2020-10-27
Anticipated expiration: 2030-02-24

Abstract

The utility model discloses a dry drilling coal dust pneumatic conveyor for soft coal seams, which comprises a frame, an unloading pipe chute, a water mist nozzle, a rubber conveying hose, a conveying ejector, a screening conical hopper and a protective cover; wherein, the screening conical funnel is internally welded and fixed with a screening plate which inclines downwards from front to back, and a coal block discharge hole is arranged on a rear side plate connected with the screening plate; the protective cover is connected with the screening conical funnel up and down; the conveying ejector is fixedly connected below the screening conical hopper, and two ends of the rubber conveying hose are respectively and fixedly connected with the discharging pipe groove and the conveying ejector; the device can sieve out the great coal cinder of particle diameter that appears occasionally when the dry-type drilling in soft coal seam, utilizes the strength effect that compressed air lets in to carry the sprayer to produce to carry the pipe box of unloading with the coal cinder, falls into the mine car after water smoke nozzle spun water smoke removes dust, and the delivery path flexible, equipment layout is nimble, has eliminated the coal dust pollution, has avoided the siltation of coal cinder in the tunnel in the pit, has improved coal cinder clearance work efficiency.

Description

Dry type drilling coal dust pneumatic conveyor for soft coal seam

Technical Field

The utility model relates to a be used for colliery soft coal seam drilling technical field in the pit particularly, especially, relate to a conveyor that is used for colliery soft coal seam dry-type drilling discharge coal bits in the pit.

Background

In the process of gas extraction and drilling construction of a soft coal seam under a coal mine, a dry-type drilling process of mechanical slag removal or pneumatic slag removal is widely adopted, wherein the mechanical slag removal is realized by utilizing the rotation of a helical blade drill rod or a three-edged drill rod and the like during drilling, the pneumatic slag removal is realized by utilizing compressed air to be introduced into the bottom of a drill hole through an inner hole of the drill rod, and coal scraps generated by cutting coal rocks by a drill bit are discharged out of a hole along an annular gap between the drill rod and the hole wall; a large amount of coal dust is piled up in the tunnel after discharging from the drilling in the drilling process, brings very big inconvenience for drilling site operation drilling equipment in the pit, has seriously influenced the standardized image of mine, and the colliery need arrange special clearance personnel regularly to carry out manual cleaning to accumulational coal dust, utilizes the spade to pack the coal dust into the mine car, and the cleaning work intensity of labour is big, and operational environment is abominable, has improved the cost of labor of coal mine production.

Disclosure of Invention

To the problem that exists in the gas drainage drilling construction is carried out in the soft coal seam to above-mentioned coal enterprise, the utility model provides a soft coal seam dry-type drilling coal cinder pneumatic conveyor, this equipment are screening out the back with the great coal cinder of drilling in-process discharged granularity occasionally, utilize compressed air to let in the pneumatic action that carries the sprayer production and carry the mine car of packing into with drilling exhaust coal cinder.

The specific technical scheme is as follows: the dry drilling coal dust pneumatic conveyor for the soft coal seam comprises a frame, a discharge pipe groove, a water mist nozzle, a rubber conveying hose, a conveying ejector, a screening conical hopper and a protective cover; wherein, the delivery injector consists of a nozzle, a throat pipe, a feed chute and an air source valve; the screening conical hopper consists of supporting legs, a connecting plate, a front side plate, a left side plate, a right side plate, a rear side plate, a screen plate and a coal guide chute; the protective cover consists of a left side plate, a right side plate, a rear side plate and a top plate.

The screening conical funnel is internally welded and fixed with a screen plate which inclines downwards from front to back, and the diameter of a screen hole of the screen plate is equal to the minimum inner diameter of a throat pipe of the conveying ejector; a coal block discharge port is arranged on the rear side plate connected with the sieve plate, and a coal block guide chute is fixedly welded on the outer edge of the coal block discharge port; the middle position of a connecting plate of the screening conical funnel is provided with a funnel discharge port, and the peripheral edges of the funnel discharge port are respectively welded and fixed with the front side plate, the left side plate, the right side plate and the rear side plate; the four supporting legs are respectively welded and fixed at the four corners of the connecting plate.

A through drilling hole is formed in the rear side plate of the protective cover; the left side plate and the right side plate of the protective cover are respectively fixedly connected with the left side plate and the right side plate of the screening conical funnel by bolts.

The size of the feed port of the feed chute of the conveying ejector is the same as that of the funnel discharge port of the connecting plate of the screening conical funnel, and the feed chute of the conveying ejector is fixedly connected below the funnel discharge port of the connecting plate of the screening conical funnel through bolts.

One end of the rubber conveying hose is fixedly connected with the discharge pipe groove by a hoop, and the other end of the rubber conveying hose is fixedly connected with a throat pipe of the conveying ejector by the hoop.

The discharging pipe groove is fixedly arranged on the frame; the water mist nozzle penetrates through and is fixedly installed on a top plate of the discharging pipe groove opposite to the discharging opening of the discharging pipe groove.

The beneficial effects of the utility model are that, the dry-type drilling coal cinder pneumatic conveyor of soft coal seam simple structure, high durability and convenient use, can sieve out the back with the great coal cinder of the particle diameter that appears occasionally in the drilling process, utilize compressed air to let in the pneumatic action that carries the sprayer to produce and carry the mine car of packing into with the drilling coal cinder, the delivery path flexible, equipment step is put in a flexible way in constrictive colliery underworkings, the siltation of coal cinder in underworkings has been avoided, the quantity of coal cinder clearance staff has been reduced, the intensity of labour of workman has been reduced, the work efficiency of coal cinder clearance has been improved, the purpose of subtracting the human effect is carried to the reduction has been reached.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Figure 2 is the utility model discloses a screening conical hopper structure schematic diagram.

Fig. 3 is a bottom view of the sieving conical funnel of fig. 2.

Fig. 4 is a schematic view of the protective cover structure of the present invention.

Fig. 5 is a schematic structural view of the delivery injector of the present invention.

Detailed Description

As shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the dry-type drilling coal dust pneumatic conveyor for the soft coal seam comprises a frame 1, a discharge pipe chute 2, a water spray nozzle 3, a rubber conveying hose 4, a conveying ejector 5, a screening conical hopper 6 and a protective cover 7; wherein, the delivery injector 5 consists of a nozzle 52, a throat 54, a feeding groove 53 and a gas source valve 51; the screening conical hopper 6 consists of supporting legs 68, a connecting plate 67, a front side plate 61, a left side plate 62, a right side plate 66, a rear side plate 63, a screen plate 60 and a coal guide chute 65; the hood 7 is composed of a left side plate 71, a right side plate 73, a rear side plate 72, and a top plate 74.

The screening cone-shaped funnel 6 is internally welded and fixed with a screening plate 60 which inclines downwards from front to back, and the diameter of a screen hole of the screening plate 60 is equal to the minimum inner diameter of the throat pipe 54 of the conveying ejector 5; a coal block discharge port 64 is arranged on the rear side plate 63 connected with the sieve plate 60, and a coal block guide chute 65 is fixedly welded on the outer edge of the coal block discharge port 64; a funnel discharge port 69 is arranged in the middle of a connecting plate 67 of the screening conical funnel 6, and the peripheral edges of the funnel discharge port 69 are respectively welded and fixed with the front side plate 61, the left side plate 62, the right side plate 66 and the rear side plate 63; the four legs 68 are welded and fixed to four corners of the coupling plate 67, respectively.

A through drilling hole 75 is formed in the rear side plate 72 of the protective cover 7; the left side plate 71 and the right side plate 73 of the shield 7 are fixedly coupled with the left side plate 62 and the right side plate 66 of the sieving conical hopper 6 by bolts, respectively.

The size of the feed inlet of the feed chute 53 of the conveying ejector 5 is the same as that of the funnel discharge port 69 of the connecting plate 67 of the screening cone-shaped funnel 6, and the feed chute 53 of the conveying ejector 5 is fixedly connected below the funnel discharge port 69 of the connecting plate 67 of the screening cone-shaped funnel 6 through bolts.

One end of the rubber conveying hose 4 is fixedly connected with the discharge pipe groove 2 through a clamp 11, and the other end of the rubber conveying hose is fixedly connected with a throat pipe 54 of the conveying ejector 5 through a clamp 12.

The discharge pipe chute 2 is fixedly arranged on the frame 1; the water mist nozzle 3 is fixedly arranged on a top plate 21 of the discharge pipe chute 2 opposite to the discharge opening of the discharge pipe chute 2 in a penetrating way.

When gas extraction drilling construction is carried out on a soft coal seam under a coal mine, the mine car 10 is pushed to the lower part of the rack 1, and a discharge opening of the discharge pipe chute 2 is opposite to the mine car 10; placing the coal block box 9 below the coal block guide chute 65 of the screening conical hopper 6; meanwhile, the front side plate 61 of the screening conical hopper 6 is abutted against the coal wall, a drill rod 8 for drilling is penetrated through a through drill hole 75 on the rear side plate 72 of the protective cover 7 from the rear, and then the drilling operation is started; during the drilling process of the drill rod 8, coal dust and coal dust discharged from the drill hole fall into the screening conical hopper 6 from the feed inlet on the front side of the protective cover 7, and coal blocks with larger particle sizes fall into the coal block box 9 through the coal block discharge hole 64 and the coal block guide chute 65 on the rear side plate 63 of the screening conical hopper 6 after being screened by the screen plate 60; the coal dust with smaller particle size falls into the feed chute 53 of the delivery injector 5 through the sieve plate 60.

When compressed air enters the throat 54 from the nozzle 52 of the delivery injector 5 by opening the air source valve 51 of the delivery injector 5, under the action of air force generated inside the delivery injector 5, the coal dust enters the throat 54 from the feeding chute 53 and is delivered to the discharge chute 2 through the rubber delivery hose 4, and after further dust removal of the water mist sprayed from the water mist nozzle 3, the coal dust is adhered to the coal dust and falls into the mine car 10.

In the description of the present invention, it should be understood that the terms "front", "back", "left", "right", "center", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the scope of the present invention.

Claims

1. The dry type drilling coal dust pneumatic conveyor for the soft coal seam is characterized in that: comprises a frame, a discharge pipe groove, a water mist nozzle, a rubber conveying hose, a conveying ejector, a screening conical hopper and a protective cover; wherein, the delivery injector consists of a nozzle, a throat pipe, a feed chute and an air source valve; the screening conical hopper consists of supporting legs, a connecting plate, a front side plate, a left side plate, a right side plate, a rear side plate, a screen plate and a coal guide chute; the protective cover consists of a left side plate, a right side plate, a rear side plate and a top plate.

2. The pneumatic conveyor for dry-type drilling coal scraps in soft coal seams as claimed in claim 1, wherein: the screening conical funnel is internally welded and fixed with a screen plate which inclines downwards from front to back, and the diameter of a screen hole of the screen plate is equal to the minimum inner diameter of a throat pipe of the conveying ejector; a coal block discharge port is arranged on the rear side plate connected with the sieve plate, and a coal block guide chute is fixedly welded on the outer edge of the coal block discharge port; the middle position of a connecting plate of the screening conical funnel is provided with a funnel discharge port, and the peripheral edges of the funnel discharge port are respectively welded and fixed with the front side plate, the left side plate, the right side plate and the rear side plate; the four supporting legs are respectively welded and fixed at the four corners of the connecting plate.

3. The pneumatic conveyor for dry-type drilling coal scraps in soft coal seams as claimed in claim 1, wherein: a through drilling hole is formed in the rear side plate of the protective cover; the left side plate and the right side plate of the protective cover are respectively fixedly connected with the left side plate and the right side plate of the screening conical funnel by bolts.

4. The pneumatic conveyor for dry-type drilling coal scraps in soft coal seams as claimed in claim 1, wherein: the size of the feed port of the feed chute of the conveying ejector is the same as that of the funnel discharge port of the connecting plate of the screening conical funnel, and the feed chute of the conveying ejector is fixedly connected below the funnel discharge port of the connecting plate of the screening conical funnel through bolts.

5. The pneumatic conveyor for dry-type drilling coal scraps in soft coal seams as claimed in claim 1, wherein: one end of the rubber conveying hose is fixedly connected with the discharge pipe groove by a hoop, and the other end of the rubber conveying hose is fixedly connected with a throat pipe of the conveying ejector by the hoop.

6. The pneumatic conveyor for dry-type drilling coal scraps in soft coal seams as claimed in claim 1, wherein: the discharging pipe groove is fixedly arranged on the frame; the water mist nozzle penetrates through and is fixedly installed on a top plate of the discharging pipe groove opposite to the discharging opening of the discharging pipe groove.