CN113856871A

CN113856871A - A coal cinder reducing mechanism for coal mining

Info

Publication number: CN113856871A
Application number: CN202111156173.9A
Authority: CN
Inventors: 秦喜文; 刘清宝; 华召文; 张超; 郭建南; 商德伟
Original assignee: CHINA COAL XI'AN DESIGN ENGINEERING CO LTD
Current assignee: CHINA COAL XI'AN DESIGN ENGINEERING CO LTD
Priority date: 2021-09-29
Filing date: 2021-09-29
Publication date: 2021-12-31

Abstract

The invention discloses a coal briquette crushing device for coal mining, which comprises a machine body, wherein a crushing cavity is formed in the upper part of the machine body, a central shaft is rotatably arranged at the bottom of the crushing cavity, a filter screen, a grinding plate, a filter plate and a pre-crushing cone are sequentially arranged on the central shaft from bottom to top, the filter screen and the filter plate are fixedly arranged on the inner wall of the crushing cavity, the middle parts of the filter screen and the filter plate are movably connected with the central shaft through lantern rings, the grinding plate and the pre-crushing cone are fixedly connected with the central shaft, adjustable crushing cutters and fixed crushing cutters which are distributed in a staggered mode are arranged on the pre-crushing cone, and a coaxial inverted cone-shaped impact baffle is arranged on the outer side of the pre-crushing cone. The pretreatment degree of the invention is adjustable; the pre-crushing degree of the coal blocks is greatly improved, and the pre-treatment effect is improved; the dust is prevented from rising during crushing, the blocking of the coal blocks is reduced as much as possible during the crushing process, the blocking phenomenon is reduced, and the crushing efficiency of the coal blocks is improved.

Description

A coal cinder reducing mechanism for coal mining

Technical Field

The invention relates to the technical field of coal mining, in particular to a coal briquette crushing device for coal mining.

Background

Coal mines refer to places rich in coal resources and are generally divided into underground coal mines and opencast coal mines. When the coal seam is far from the ground surface, a tunnel is usually dug to the underground, so that the coal is a mineworker coal mine. When the coal seam is very close to the earth surface, the coal is generally excavated by directly stripping the earth surface, which is an open pit coal mine. Coal is the most important solid fuel, is one of combustible organic rocks, and can be divided into four types, namely peat, lignite, bituminous coal and anthracite, according to the coal gasification degree.

The coal cinder rubbing crusher who has now for the coal mine often adopts the relative teeth of a cogwheel that sets up to extrude, smashes the coal cinder, though crushing structure is simple, nevertheless smashes inefficiency, appears the card phenomenon easily, influences crushing efficiency to burn out the motor, and it is relatively poor to smash the homogeneity, is difficult to satisfy the kibbling requirement of high-efficient coal cinder.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a coal briquette crushing device for coal mining, which has the advantages of adjustable crushing degree, high crushing efficiency, reduction of the occurrence of blocking phenomenon and the like, and solves the problems of low crushing efficiency and poor crushing quality of the conventional coal briquette crusher.

The invention is realized by the following technical scheme:

a coal briquette crushing device for coal mining comprises a machine body, wherein a crushing cavity is arranged in the machine body, a feed inlet and a discharge outlet are respectively arranged at the top and the bottom of the crushing cavity, a pre-crushing mechanism and a grinding mechanism are arranged in the crushing cavity from top to bottom, a driving motor is arranged at the bottom of the machine body, and an output shaft of the driving motor extends into the crushing cavity and is respectively connected with the pre-crushing mechanism and the grinding mechanism;

the pre-crushing mechanism comprises an inverted cone-shaped impact baffle and a pre-crushing cone, the pre-crushing cone is coaxially connected with the upper end of the output shaft, the inverted cone-shaped impact baffle is sleeved on the outer side of the pre-crushing cone, the upper end of the impact baffle is connected with the lower end of the feed inlet, a crushing channel is formed between the impact baffle and the pre-crushing cone, and a crushing cutter is arranged on the cone wall of the pre-crushing cone;

the grinding mechanism comprises a filter plate, a grinding plate and a filter screen which are sequentially arranged from top to bottom, the filter plate and the filter screen are sleeved on the output shaft in an empty mode and fixedly connected with the side wall of the grinding cavity, the grinding plate is fixedly sleeved on the output shaft, a grinding space is reserved between the grinding plate and the filter plate, a plurality of wolf tooth cylinders are connected with the outer side wall of the grinding plate, and the wolf tooth cylinders are arranged along the radial direction of the grinding plate.

Preferably, the crushing knives comprise adjustable crushing knives and fixed crushing knives, and the adjustable crushing knives and the fixed crushing knives are alternately arranged along the axial direction of the conical wall;

the fixed crushing cutter is embedded on the conical wall of the pre-crushing cone, the adjustable crushing cutter is connected with the pre-crushing cone through an adjusting device, and the adjusting device is used for adjusting the distance between the adjustable crushing cutter and the back taper impact baffle.

Preferably, the adjusting device comprises a cutter body, a push rod and a threaded rod;

the cone wall of the pre-crushing cone is provided with a mounting groove, the cutter body is assembled in the mounting groove, the upper end of the cutter body is hinged to the mounting groove, a sliding groove is formed in the back of the cutter body, one end of a push rod is connected with the sliding groove, the other end of the push rod is connected with a threaded rod, the threaded rod is coaxially and rotatably arranged in the pre-crushing cone, the upper end of the threaded rod is arranged at the top of the pre-crushing cone, and the threaded rod rotates to enable the push rod to move up and down, so that the cutter body is adjusted.

Preferably, the cutter body is assembled on the cutter body mounting seat, the sliding groove is formed in the back of the cutter body mounting seat, the end portion of the push rod is provided with a sliding connecting piece, the other end of the push rod is provided with a threaded sleeve, and the threaded sleeve is assembled with the threaded rod.

Preferably, the upper surface of the filter plate is a spherical arc surface, and the pores on the filter plate are larger than those on the filter screen.

Preferably, a plurality of crushing holes which are uniformly distributed are formed in the filter plate, both ends of each crushing hole are provided with conical openings, and the inner walls of the conical openings are provided with grinding teeth.

Preferably, the opposite sides of the filter plate and the grinding plate are provided with grinding particles.

Preferably, the bottom of crushing chamber is the inclined plane, and the discharge gate is seted up in the minimum of inclined plane.

Preferably, the discharge port is connected with the buffer box through a pipeline. The lower end of the crushing cavity is connected with the buffer box through a negative pressure adsorption device.

Preferably, the discharge port is provided with a vibrating rod.

Compared with the prior art, the invention has the following beneficial technical effects:

the invention discloses a coal block crushing device for coal mining, wherein a pre-crushing mechanism and a grinding mechanism are arranged in a crushing cavity from top to bottom, the pre-crushing mechanism passes through a conical impact baffle and a pre-crushing cone, a crushing cutter is arranged on the pre-crushing cone, coal blocks pass through a crushing channel between the conical impact baffle and the pre-crushing cone, the pre-crushing degree of the coal blocks is greatly improved through rolling of the pre-crushing cone, cutting of a cutter body on the pre-crushing cone and impact crushing of an inverted conical impact baffle, the coal blocks enter a grinding plate through a filter plate, the coal blocks are secondarily crushed through the grinding plate and a wolf tooth cylinder, and the wolf tooth is slightly inserted into a filter hole on the filter screen, so that the filter screen is prevented from being blocked, smooth coal block crushing is ensured, and the efficiency of coal block crushing is improved.

Drawings

Fig. 1 is a schematic structural diagram of a coal briquette crushing device for coal mining according to the present invention;

FIG. 2 is a top view of a filter plate and a pre-crush cone in a coal briquette crushing apparatus for coal mining according to the present invention;

FIG. 3 is a top view of a grinding plate in a coal briquette crushing apparatus for coal mining according to the present invention;

fig. 4 is a structural view of a pre-crushing cone of a coal briquette crushing apparatus for coal mining according to the present invention.

In the figure: 1, a body; 2. a central shaft; 3. a filter screen; 4. a grinding plate; 5. a filter plate; 6. an adjustable crushing knife; 61. a cutter body; 62. a cutter body mounting plate; 63. a sliding connector; 64. a push rod; 65. a threaded bushing; 66. a threaded rod; 7. pre-crushing cones; 8. a feed inlet; 9. a discharge port; 10. a buffer box; 11. a drive motor; 12. a negative pressure adsorption device; 13. crushing holes; 14. fixing a crushing cutter; 15. an auxiliary support bar; 16. a wolf tooth cylinder; 17. a bellows; 18. a blocking cover; 19. grinding the teeth; 20. impact the baffle.

Detailed Description

The present invention will now be described in further detail with reference to the attached drawings, which are illustrative, but not limiting, of the present invention.

Referring to fig. 1-3, a coal briquette crushing device for coal mining comprises a machine body 1, a crushing cavity is arranged in the machine body, a feeding hole 8 and a discharging hole 9 are respectively arranged at the top and the bottom of the crushing cavity, a pre-crushing mechanism and a grinding mechanism are arranged in the crushing cavity from top to bottom, a driving motor 11 is arranged at the bottom of the machine body 1, an output shaft of the driving motor 11 is connected with a central shaft 2, and the upper end of the central shaft extends into the crushing cavity to be respectively connected with the pre-crushing mechanism and the grinding mechanism.

The pre-crushing mechanism comprises an inverted cone impact baffle plate 20 and a pre-crushing cone 7, the pre-crushing cone 7 is coaxially connected with the upper end of a central shaft, an auxiliary support rod 15 is connected between the bottom of the pre-crushing cone 7 and the central shaft 2, the inverted cone impact baffle plate 20 is an annular closing mechanism and is sleeved on the outer side of the pre-crushing cone 7, the upper end of the impact baffle plate 20 is connected with the lower end of a feed inlet 8, a crushing channel is formed between the impact baffle plate 20 and the pre-crushing cone 7, an adjustable crushing cutter 6 and a fixed crushing cutter 14 are arranged on the cone wall of the pre-crushing cone 7 in a radial mode, and the adjustable crushing cutter 6 and the fixed crushing cutter 14 are alternately arranged along the axial direction of the cone wall.

Grinding mechanism includes filter 5, lapping plate 4, filter screen 3 and wolf tooth section of

thick bamboo

16, 4 fixed cover of lapping plate are established on

center pin

4, 3 empty cover of filter screen are on center pin 4 and lie in lapping plate 4's bottom, lapping plate 4's top is provided with

filter

5, 5 covers of filter are established on the center pin, and with 4 between the lapping plate reserve and have the grinding space, the edge of filter 5 and filter screen 3 all with the lateral wall rigid coupling in crushing chamber, a plurality of wolf tooth section of thick bamboo 16 are connected through the lateral wall of pivot with lapping plate 4, and wolf tooth section of thick bamboo 16 is along the radial setting of lapping plate 4.

The upper surface of filter 5 is the globoid face, the hole on filter 5 is greater than the hole size on filter screen 3, filter screen 3 and filter 5 pass through the fastener and install on the inner wall in crushing chamber, and the middle part all links to each other with 2 activities of center pin through the lantern ring, do not influence the normal rotation of center pin 2, set up a plurality of evenly distributed's crushing hole 13 on the filter 5, the both ends of smashing hole 13 are the bell mouth and form the horn mouth shape, just also the business turn over of abrasive material, grinding teeth 19 has been seted up on the inner wall of bell mouth, one side that filter 5 and grinding plate 4 are relative is equipped with the abrasive grain.

The discharge end of discharge gate 9 is connected with buffering box 10, and driving motor 11 installs at the top of buffering box 10 to be located one side of discharge gate 9, negative pressure adsorption device 12 is installed to driving motor 11's opposite side, and negative pressure adsorption device 12 entry and the lower extreme intercommunication of smashing the chamber, exit linkage to in the buffer tank is used for adsorbing the tiny powder that the coal cinder produced at crushing in-process, and the absorption mouth of negative pressure adsorption device 12 is installed and is filtered the fine net.

The bottom in crushing chamber is the inclined plane, and discharge gate 9 is seted up at the lower of inclined plane, and bellows 17 buffering box 10 is passed through to the bottom of discharge gate 9 and is connected, and the internally mounted of discharge gate 9 has the vibrating spear, and coal charge blocks up when can avoiding the ejection of compact.

Referring to fig. 1, 2 and 4, the adjustable crushing cutter 6 comprises a cutter body 61, a cutter body mounting plate 62, a sliding connection member 63, a push rod 64, a threaded sleeve 65 and a threaded rod 66, wherein a plurality of mounting grooves matched with the cutter body mounting seat 62 are formed on the pre-crushing cone 7, the upper end of the cutter body mounting seat 62 is rotatably mounted in the mounting grooves, the cutter body 61 is mounted on the cutter body mounting plate 62, a chute is formed in the bottom surface of each cutter body mounting plate 62 and is slidably connected with the sliding connection member 63, each sliding connection member 63 is mounted at the end of the push rod 64, the other end of the push rod 64 is fixed on the threaded sleeve 65, a coaxial cylindrical hole is formed in the pre-crushing cone 7, the bottom end of the threaded rod 66 is rotatably mounted at the bottom of the cylindrical hole, the threaded sleeve 65 is connected with the threaded rod 66 through threads, the push rods 64 are radially distributed, and the top end of the threaded rod 66 extends to the outer side of the cylindrical hole, the outer side of the threaded rod 66 is covered with a blocking cover 18 which is in threaded connection with the pre-crushing cone 7, and one end of the sliding connecting piece 63 which is connected with the sliding chute is in a spherical shape.

Before crushing, can be according to actual conditions, adjust the area that stretches out of cutter body 1, thereby improve crushing degree and the efficiency to the coal cinder, during the regulation, take off fender lid 18, rotate threaded rod 66, through the cooperation between threaded sleeve 65 and the threaded rod 66, realize the lift of threaded sleeve 65, thereby make sliding connection 63 on the horizontal pole 64 slide along the spout behind the back of cutter body mount pad 62, push out or draw in cutter body mount pad 62, cutter body 61 and cutter body mount pad 62 rotate around the junction with the mounting groove, thereby realize the adjustment of cutter body 61 area that stretches out, cutter body 61 is after overhanging, can reduce the falling speed of coal cinder to a certain extent, improve the pre-crushing degree of coal cinder.

The working principle of the coal briquette crushing device for coal mining provided by the invention is explained below.

When the coal crushing machine works, coal blocks are added into a crushing cavity in the machine body 1 through the feed inlet 8, the driving motor 11 drives the central shaft 2 to rotate, the central shaft 2 drives the pre-crushing cone 7 to rotate in the rotating process, the adjustable crushing cutter 6 and the fixed crushing cutter 14 on the central shaft carry out primary crushing on the coal blocks in the rotating process, part of the coal blocks fly and impact the inverted cone-shaped impact baffle plate 20 under the impact force of the cutter body to be crushed in an impact accelerating way, the crushed coal blocks descend to the filter plate 5 through a gap between the inverted cone-shaped impact baffle plate 20 and the pre-crushing cone 7 and fall onto the grinding plate 4 through the crushing holes 13 on the filter plate 5, after the coal blocks in the crushing holes are contacted with the rotating grinding plate in the rotating process, the grinding teeth on the crushing holes can assist in crushing, the grinding efficiency is accelerated, the crushing holes are avoided, the crushed coal blocks fall onto the filter screen 3, the wolf tooth cylinder 16 can further stir and roll the crushed coal blocks, wolf tooth slightly inserts in the filter hole on the filter screen 3, can avoid filter screen 3 to be blockked up, guarantees that the kibbling smooth and easy going on of coal cinder, and through filter screen 3's coal charge, the inclined plane gliding along organism 1 bottom falls into discharge gate 9, and the vibrating spear can accelerate the ejection of compact, avoids the jam of discharge gate, gets into the buffer box 10 behind the ejection of compact, is taken away by the conveyer belt, accomplishes and smashes.

The coal briquette crushing device for coal mining provided by the invention has the following beneficial effects:

1. this a coal cinder reducing mechanism for coal mining rolls, the shredding of cutter body and the striking of back taper impact baffle on it through the precomminution cone and smashes, has improved the precomminution degree to the coal cinder in very big degree, improves pretreatment efficiency.

2. This a coal cinder reducing mechanism for coal mining, at kibbling in-process, through negative pressure adsorption equipment's setting, can adsorb and produce slight buggy in crushing process, reduce the dust of raising up, through because negative pressure adsorption equipment installs the lower part at the organism, still play certain coal charge and guide the function down, reduce the jam condition of coal charge crushing in-process.

3. This a coal cinder reducing mechanism for coal mining, after carrying out the preliminary treatment to the coal cinder, crushing hole on the filter falls into on the lapping plate, the setting of grinding tooth can avoid crushing hole to be blockked up, make things convenient for the business turn over of coal cinder, the coal cinder after the grinding falls on the filter screen, the wolf tooth section of thick bamboo can further stir to the coal cinder after the grinding and roll, the wolf tooth inserts in the filtration pore on the filter screen slightly, avoid the filter screen to be blockked up, guarantee that the kibbling smooth and easy going on of coal cinder, the coal charge through the filter screen, slide along the inclined plane of bottom of the body down and fall into in the discharge gate, the vibrting spear can accelerate the ejection of compact, avoid the jam of discharge gate, smash the possibility that whole journey reduces to block up the production as far as possible, reduce the dead phenomenon of card, improve the kibbling efficiency of coal cinder.

This a coal cinder reducing mechanism for coal mining can adjust the area that stretches out of cutter body according to actual conditions, and the cutter body can reduce the distance that strikes the baffle with the back taper after overhanging, reduces the falling speed of coal cinder to a certain extent, improves the degree of smashing in advance of coal cinder.

The above-mentioned contents are only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited thereby, and any modification made on the basis of the technical idea of the present invention falls within the protection scope of the claims of the present invention.

Claims

1. A coal briquette crushing device for coal mining is characterized by comprising a machine body (1), a crushing cavity is arranged in the machine body, a feeding hole (8) and a discharging hole (9) are respectively formed in the top and the bottom of the crushing cavity, a pre-crushing mechanism and a grinding mechanism are arranged in the crushing cavity from top to bottom, a driving motor (11) is arranged at the bottom of the machine body (1), and an output shaft of the driving motor (11) extends into the crushing cavity and is respectively connected with the pre-crushing mechanism and the grinding mechanism;

the pre-crushing mechanism comprises an inverted cone-shaped impact baffle plate (20) and a pre-crushing cone (7), the pre-crushing cone (7) is coaxially connected with the upper end of an output shaft, the inverted cone-shaped impact baffle plate (20) is sleeved on the outer side of the pre-crushing cone (7), the upper end of the impact baffle plate (20) is connected with the lower end of a feed inlet (8), a crushing channel is formed between the impact baffle plate (20) and the pre-crushing cone (7), and crushing cutters are arranged on the cone wall of the pre-crushing cone (7);

grind filter (5), lapping plate (4) and filter screen (3) that the mechanism includes that top-down sets gradually, filter (5) and filter screen (3) empty cover on the output shaft and with the lateral wall rigid coupling in crushing chamber, lapping plate (4) fixed cover is established on the output shaft to and filter (5) between reserve and have the grinding space, a plurality of wolf tooth section of thick bamboo (16) are connected with the lateral wall of lapping plate (4), and wolf tooth section of thick bamboo (16) are along the radial setting of lapping plate (4).

2. The coal briquette crushing device for coal mining according to claim 1, characterized in that the crushing knives comprise adjustable crushing knives (6) and fixed crushing knives (14), the adjustable crushing knives (6) and the fixed crushing knives (14) are alternately arranged along the axial direction of the conical wall;

the fixed crushing cutter (14) is embedded on the conical wall of the pre-crushing cone (7), the adjustable crushing cutter (6) is connected with the pre-crushing cone (7) through an adjusting device, and the adjusting device is used for adjusting the distance between the adjustable crushing cutter (6) and the inverted cone impact baffle (20).

3. A coal briquette breaking device for coal mining as claimed in claim 2, characterised in that the adjustment means comprise a cutter body (61), a push rod (64) and a threaded rod (66);

the novel cutter is characterized in that a mounting groove is formed in the conical wall of the pre-crushing cone (7), the cutter body (61) is assembled in the mounting groove, the upper end of the cutter body is hinged to the mounting groove, a sliding groove is formed in the back of the cutter body (61), one end of the push rod (64) is connected with the sliding groove, the other end of the push rod is connected with the threaded rod (66), the threaded rod (66) is coaxially and rotatably arranged in the pre-crushing cone (7), the upper end of the threaded rod (66) is arranged at the top of the pre-crushing cone (7), and the threaded rod (66) rotates to enable the push rod (64) to move up and down so as to achieve adjustment of the cutter body.

4. The coal briquette crushing device for coal mining according to claim 3, wherein the cutter body is assembled on the cutter body mounting seat (62), the sliding groove is arranged at the back of the cutter body mounting seat (62), the end part of the push rod is provided with a sliding connecting piece (63), the other end of the push rod is provided with a threaded sleeve (65), and the threaded sleeve (65) is assembled with the threaded rod.

5. The apparatus as claimed in claim 1, wherein the upper surface of the filter plate (5) is a spherical arc surface, and the pores of the filter plate (5) are larger than those of the filter screen (3).

6. The coal briquette crushing device for coal mining according to claim 1, characterized in that the filter plate (5) is provided with a plurality of uniformly distributed crushing holes (13), both ends of the crushing holes (13) are conical mouths, and the inner walls of the conical mouths are provided with grinding teeth (19).

7. A coal crushing device for coal mining according to claim 6, characterized in that the opposite sides of the filter plate (5) and the grinding plate (4) are provided with abrasive grains.

8. A coal briquette breaking device for coal mining as claimed in claim 1, characterised in that the bottom of the breaking chamber is an inclined plane, and the discharge opening (9) is provided at the lowest part of the inclined plane.

9. The coal briquette crushing device for coal mining according to claim 1, characterized in that the discharge port (9) is connected with the buffer box (10) through a pipeline, and the lower end of the crushing cavity is connected with the buffer box (10) through a negative pressure adsorption device.

10. A coal briquette breaking device for coal mining as claimed in claim 1, characterised in that the discharge opening (9) is provided with a vibrating rod.