CN206911449U - Coal mining breaker - Google Patents

Abstract

The utility model discloses a crushing device for coal mining, which includes a pre-screening device and a crushing device. The pre-screening device includes a box body, a combined rotating shaft is fixed in the box, and a first grate plate and a first grate plate are fixed on the combined rotating shaft. The second grate plate, the first discharge port at the bottom of the box communicates with the discharge barrel through the discharge inclined pipe, and a crushing motor is fixed at the bottom of the crushing device. The center of the bottom surface of the roller is fixedly connected. The crushing roller is covered with a wear-resistant shell. The wear-resistant shell is divided into the first crushing part, the second crushing part and the third crushing part from top to bottom. The cone angle is the same as that of the crushing roller. They are all the same, but the diameter of the bottom surface decreases step by step from the first crushing part to the second crushing part and then to the third crushing part. This system can crush lump coal efficiently with less investment and low maintenance cost.

Description

Crusher for coal mining

technical field

The utility model relates to equipment for mining coal mines, in particular to a crushing device for coal mine mining composed of lump coal sorting and crushing devices.

Background technique

The coal unearthed in the mine needs to be crushed before being transported and used, and it is crushed into fine coal particles before being transported and shaped for use. Among the existing crushers, the impact crusher has a better crushing effect on coal products. Machine and hammer crusher, which mainly use the impact force for crushing, have a wide range of applications, small wear of the broken parts, and easy replacement. However, it has certain requirements for the particle size of the input raw materials. After the coal mine is unearthed, most of it has an overall block structure. When using the above-mentioned crusher for crushing, it is often necessary to smash it into small pieces of raw materials in advance, which wastes a lot of energy. time; as a medium crushing equipment, the hammer crusher has a large particle size after crushing, and sometimes it is necessary to finely crush the finished product again, which is very troublesome. In addition, after the raw material is put in, it is a mixture of fine particles and raw material blocks , after being put together, a large number of fine particles need to fall through the grating bar. At this time, it is easy to cause material accumulation at the grating bar, which not only affects the crushing effect of the bulk material, but also easily causes the grating bar to be blocked. Therefore, before the actual crushing, often The mixture will be screened and separated in advance with a sieve, and large pieces of material will be put into coarse crushing. The actual operation of the whole process is very troublesome.

In the prior art, there are a large number of patents for classification, screening and crushing of lump coal, the main form of which is to firstly use a hammer or jaw crusher for primary crushing, and then pass through a roller crusher for secondary crushing. Between the primary crushing and secondary crushing, the materials are screened by the screening device, and the particles that do not meet the requirements are put into the roller crusher for crushing, and the particles that meet the requirements are directly sent to the finished product. This method is very complicated for one set of equipment, especially the moving parts, two sets of crushers, and the maintenance cost is very high. It will also greatly increase the cost of equipment purchase.

In addition, before the lump coal enters the crushing equipment, pre-screening is very necessary, which can reduce repeated crushing of qualified materials, reduce energy consumption, and prevent the problem of large dust emission caused by too small lump coal particles. However, the existing pre-screening is screen screening, which is very easy to block the screen holes, resulting in a decrease in follow-up work efficiency or direct shutdown. However, in the existing technology, there is no effective device for cleaning the screen. The vibrating screen has a good effect on the adhesive particles, but it cannot remove the particles stuck in the screen holes. If it is used for a long time, the entire system will be damaged. work efficiency drops. However, the replacement of the screen basically requires downtime, which is very troublesome.

Contents of the invention

The purpose of the utility model is to provide a crushing device for coal mining that can pre-screen without blocking materials and has only one set of crushing equipment.

In order to achieve the above object, the utility model includes a pre-screening device and a crushing device, the pre-screening device includes a box, the top of the box is provided with an inverted cone-shaped lower hopper, and a combined rotating shaft is fixed in the box. The combined rotating shaft includes an inner shaft and an outer shaft sleeve, the inner shaft and the outer shaft sleeve are coaxial, the inner shaft is fixedly connected with a second grate plate through the fixing rods at both ends, and a second grate plate is fixed on the outer surface of the outer shaft sleeve. A grate plate, the first grate plate and the second grate plate are provided with parallel and evenly divided grate teeth, and the distance between the grate teeth of the second grate plate is smaller than the distance between the grate teeth of the first grate plate;

The bottom end of the box body is provided with a first discharge port and a second discharge port, the bottom end of the first grate plate is located above the first discharge port, and the bottom end of the second grate plate is located at Above the second feeding port;

The first feeding port is connected with the inclined feeding pipe, and one end of the inclined feeding pipe adjacent to the first feeding port is provided with a bottom pressing plate, and a smashing rod is slidingly connected to the corresponding position of the bottom pressing plate, and the lower end of the hitting rod is The upper pressing plate is fixedly connected, and there are a number of smashing teeth on both the upper pressing plate and the bottom pressing plate. The upper end is fixedly connected with a smashing motor, and the rotating shaft of the smashing motor is fixedly connected with an incomplete gear, and the incomplete gear is meshed with the gear bar.

The inclined feeding tube is connected with the feeding tube at the top of the crushing device, and an inverted cone-shaped funnel is provided below the feeding end at the connection point, and a cross-shaped first spreading rack is horizontally fixed on the inner wall of the feeding tube under the funnel , there is a cross-shaped second spreading rack below the first spreading rack, and there is an angle between the second spreading rack and the first spreading rack in the horizontal direction, and the included angle is 45 degrees. A spreading cone is suspended and fixed at the bottom of the center of the second spreader;

The bottom of the lower barrel extends into the crushing device, and a crushing motor is fixed at the bottom of the crushing device. The crushing motor is vertically arranged, and its top is fixedly connected to the center of the bottom surface of the conical crushing roller through a transmission shaft. The crushing roller The outer cover has a wear-resistant shell, and the bottom end of the lower barrel extends into the wear-resistant shell. The wear-resistant shell is divided into a first crushing part, a second crushing part and a third crushing part from top to bottom. The crushing part, the second crushing part and the third crushing part are all in the shape of a truncated cone, and the cone angle is the same as that of the crushing roller, but the diameter of the bottom surface decreases step by step from the first crushing part to the second crushing part and then to the third crushing part. small, the second feeding port communicates with the second crushing part through the second feeding inclined tube;

The bottom end of the third crushing part communicates with a second lower material barrel, and the bottom end of the second lower material barrel communicates with a hopper;

The inclined feeding tube is provided with a lower concave portion with a hemispherical longitudinal section between the bottom pressing plate and the lowering barrel, and a turning roller is positioned in the lower concave portion, and a turning plate is fixed on the turning stick, and the turning plate is curved. The bending direction of the panel is consistent with the rotation direction of the turning roller, and the turning roller drives the turning plate to feed material to the downward direction of the barrel;

A first sieve plate is provided on the bottom surface of the blanking inclined tube between the lower concave part and the bottom pressing plate, a second sieve plate is provided on the bottom surface of the blanking inclined tube between the lower concave part and the lower feeding cylinder, the first sieve plate and the second The second sieve plate is composed of sieve rods which are parallel to the inclined pipe for feeding and have equal spacing. Both the branch pipe and the second feeding branch pipe communicate with the second feeding inclined pipe.

The pre-screening device is equipped with two grate plates formed by parallel and equally spaced grate teeth to pre-screen lump coal. The advantage of this grate plate is that it has no sieve holes and is set at an inclination, so that the material basically does not fall on the grate plate. It can be piled up on the top and can effectively screen the lump coal. Improve the stability of the operation of the entire system, and prevent material blockage and shutdown.

The crushing roller in the crushing device can crush lump coal with different particle sizes by setting the crushing part shell with a different distance from the crushing roller surface to achieve multi-stage continuous crushing, and only one crushing system is needed, which greatly saves the fixed Cost, and later maintenance costs are also very low.

In addition, the two-stage material spreading device and the material spreading cone in the lower material barrel can distribute the material evenly in the circumferential direction, improve the efficiency of the equipment, and prevent local roller surface damage caused by excessive local material falling. Improve the service life of equipment, lengthen the time interval of maintenance, and further reduce the cost.

The function of the turning roller, the first sieve plate and the second sieve plate is that after the pre-crushing of the upper and lower pressing plates, some fine particles will be contained, and some of these fine particles will pass through the first sieve plate and enter the second crushing part. However, the fine particles mixed in the upper layer of the material cannot be discharged. After turning over the turning roller, the upper layer material is turned over to the lower layer, and the fine particles mixed in the middle and upper layer can be discharged through the second sieve plate and directly enter the second crushing part to further improve the crushing capacity. crushing efficiency.

Further, the first grate plate is provided with a first comb, the first comb and the grate teeth are vertically arranged, the first comb is provided with comb teeth with the same width as the gap between the grate teeth, and the outer shaft A first electric push rod is put on and fixed, and the push-out end of the first electric push rod is fixedly connected with the first comb. Pushing and pulling the grate comb through the electric push rod can clean the grate plate and prevent lump coal from getting stuck between the grate teeth.

Further, the second grate plate is provided with a second comb, the second comb is arranged perpendicular to the grate teeth, the second comb is provided with comb teeth with the same width as the gap between the grate teeth, and the inner shaft Two ends fix a second electric push rod through the fixed rod, and the push-out end of the second electric push rod is fixedly connected with the second comb.

Further, protrusions are fixed on the outer surface of the crushing roller. The function of the protrusion is to improve the crushing efficiency.

Further, on the outer surface of the crushing roller, a crushing hammer is fixed in a space corresponding to the first crushing part, crushing teeth are fixed in a space corresponding to the second crushing part, and small crushing teeth are fixed in a space corresponding to the third crushing part. The role of the breaking hammer is to break large particles, and the crushing teeth are more focused on crushing and crushing, and the crushing effect is better for small particles. The upper part is equipped with a breaking hammer, and the middle and lower parts are equipped with large and small crushing teeth, which can effectively break lump coal.

Further, the bottom surface of the pre-screening device is provided with a spacer between the first discharge port and the second discharge port, the longitudinal section of the spacer is triangular, and it also includes a baffle plate, one end of the baffle plate It is fixedly connected with the edge of the second feeding port, and the other end is fixed on the box body.

Description of drawings

Fig. 1 is a schematic diagram of the utility model.

Fig. 2 is a schematic diagram of the first grate.

Fig. 3 is a schematic diagram of the second grate.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

As shown in Figures 1 to 3, a crushing device for coal mining includes a pre-screening device 1 and a crushing device 3, the pre-screening device 1 includes a box body 100, the top of the box body 100 is provided with an inverted Conical lower hopper 11, a combined rotating shaft 12 is fixed inside the box body 100, the combined rotating shaft 12 includes an inner shaft 121 and an outer shaft sleeve 122, the inner shaft 121 is coaxial with the outer shaft sleeve 122, and the inner shaft 121 passes through the The fixed rod is fixedly connected with a second grate plate 14, the outer surface of the outer bushing 122 is fixed with a first grate plate 13, and the first grate plate 13 and the second grate plate 14 are provided with parallel and evenly divided grate plates. Teeth, the spacing of the grate teeth of the second grate plate 14 is less than the spacing between the grate teeth of the first grate plate 13;

The bottom end of the box body 100 is provided with a first discharge port 16 and a second discharge port 17, the bottom end of the first grate plate 13 is located above the first discharge port 16, and the second grate The bottom end of the plate 14 is located above the second feeding port 17;

The first feeding opening 16 communicates with the feeding inclined pipe 161, and the end of the feeding inclined pipe 161 near the first feeding opening 16 is provided with a bottom pressing plate 22, which is slidably connected with the corresponding position of the bottom pressing plate 22 and has a smashing Rod 21, the lower end of smashing rod 21 is fixedly connected with upper pressing plate 23, and the plate surface of upper pressing plate 23 and bottom pressing plate 22 are all provided with some smashing teeth, smashing spring is connected between hitting bar 21 and blanking inclined pipe 161 top plate, smashing A gear bar is fixedly embedded on the stroke rod 21, and a smashing motor is fixedly connected to the upper end of the blanking inclined pipe 161, and an incomplete gear is fixedly connected to the rotating shaft of the smashing motor, and the incomplete gear is meshed with the gear bar.

The inclined feeding tube 161 communicates with the feeding tube 31 at the top of the crushing device 3, and an inverted cone-shaped funnel 311 is arranged below the feeding end at the connection point. Glyph first spreading frame 312, a cross-shaped second spreading frame 313 is arranged below the first spreading frame 312, and there is a folder between the second spreading frame 313 and the first spreading frame 312 in the horizontal direction. angle, the included angle is 45 degrees, and a spreading cone 314 is suspended and fixed at the bottom end of the center of the second spreading frame 313;

The bottom of the lower barrel 31 extends into the crushing device 3, and a crushing motor 36 is fixed at the bottom of the crushing device 3. The crushing motor 36 is vertically arranged, and its top is fixed to the center of the bottom surface of the conical crushing roller 35 through a transmission shaft. connected, the crushing roller 35 is covered with a wear-resistant casing, the bottom of the lower barrel 31 extends into the wear-resistant casing, and the wear-resistant casing is divided into a first crushing part 321 and a second crushing part from top to bottom. Part 322 and the third crushing part 323, the first crushing part 321, the second crushing part 322 and the third crushing part 323 are all truncated cones, and the cone angle is the same as that of the crushing roller 35, but the diameter of the bottom surface is larger than that of the first crushing part 321, to the second crushing part 322 and then to the third crushing part 323, the second crushing part 323 is gradually reduced, and the second discharge port 17 communicates with the second crushing part 322 through the second discharge inclined pipe 171;

The bottom end of the third crushing part 323 communicates with a second lower barrel 34, and the bottom end of the second lower barrel 34 communicates with a hopper 37;

Described blanking inclined pipe 161 is provided with a vertical cross-section between the bottom platen 22 and the lower barrel 31 and is a hemispherical lower concave portion 191, and a turning roller 19 is positioned in the lower concave portion 191, and the turning material is fixed on the turning roller 19. The turning plate is a curved panel, and its bending direction is consistent with the direction of rotation of the turning roller 19, and the turning roller 19 drives the turning plate to feed material to the downward direction of the barrel 31;

A first sieve plate is provided on the bottom surface of the blanking inclined tube 161 between the lower concave portion 191 and the bottom pressing plate 22, and a second sieve plate is provided on the bottom surface of the blanking inclined tube 161 between the lower concave portion 191 and the lower material cylinder 31. The first sieve plate and the second sieve plate are composed of sieve rods parallel to the discharge inclined pipe 161 and equally spaced. The feeding branch pipe 192 , the first feeding branch pipe 193 and the second feeding branch pipe 192 are all in communication with the second feeding inclined pipe 171 .

The first grate plate 13 is provided with a first comb 131, the first comb 131 is vertically arranged with the grate teeth, the first comb 131 is provided with comb teeth with the same width as the gap between the grate teeth, the outer A first electric push rod is fixed on the axle sleeve 122, and the push-out end of the first electric push rod is fixedly connected with the first comb 131.

The second grate plate 14 is provided with a second comb 141, and the second comb 141 is vertically arranged with the grate teeth, and the second comb 141 is provided with the same comb teeth with the gap width between the grate teeth. Axle 121 two ends fix a second electric push rod by fixed rod, and the push-out end of the second electric push rod is fixedly connected with the second comb 141.

Protrusions are fixed on the outer surface of the crushing roller 35 .

On the outer surface of the crushing roller 35 , a crushing hammer 331 is fixed in a space corresponding to the first crushing part 321 , a crushing tooth 332 is fixed in a space corresponding to the second crushing part 322 , and a small crushing tooth 333 is fixed in a space corresponding to the third crushing part 323 .

The bottom surface of described pre-screening device 1 is provided with a spacer 18 between the first discharge port 16 and the second discharge port 17, and the longitudinal section of the spacer 18 is triangular, also comprises a retaining plate 15, retaining One end of the material plate 15 is fixedly connected to the edge of the second feeding opening 17 , and the other end is fixed on the box body 100 .

When the system is in use, it cooperates with the belt to discharge material to the pre-screening device. After being screened by the grate plate, the large particles pass through the inclined feeding tube. , After evenly spreading the material, it enters the next process through the three-stage crushing of the crushing roller.

The fine particles enter the second crushing part through the second discharge inclined pipe after passing through the second grate plate, and enter the next process after two-stage crushing. The whole system is integrated in one place, with simple structure, convenient use, less investment and low maintenance. low cost. In actual use, it is also possible to set a third inclined tube for feeding, and to rotate the inner shaft and outer shaft sleeve in the combined rotating shaft to adjust the positions of the first and second grate plates, so that the lump coal can be divided into three grades, the smallest The particles enter the third crushing part through the third discharge inclined pipe, or directly communicate with the hopper.

Claims (6)

1. A crushing device for coal mine development, comprising a pre-screening device (1) and a crushing device (3), characterized in that, the pre-screening device (1) includes a casing (100), the casing (100) is provided with an inverted conical lower hopper (11), and a combined rotating shaft (12) is fixed inside the box body (100). The combined rotating shaft (12) includes an inner shaft (121) and an outer shaft sleeve (122) , the inner shaft (121) is coaxial with the outer shaft sleeve (122), the inner shaft (121) is fixedly connected with a second grate plate (14) through the fixing rods at both ends, and the outer shaft sleeve (122) A first grate plate (13) is fixed on the surface, and the first grate plate (13) and the second grate plate (14) are provided with parallel and evenly divided grate teeth, and the grate teeth of the second grate plate (14) The spacing is less than the spacing between the grate teeth of the first grate plate (13); The bottom end of the casing (100) is provided with a first discharge port (16) and a second discharge port (17), and the bottom end of the first grate plate (13) is located at the first discharge port ( 16), the bottom end of the second grate plate (14) is located above the second feeding port (17); The first feeding opening (16) communicates with the feeding inclined pipe (161), and the end of the feeding inclined pipe (161) near the first feeding opening (16) is provided with a bottom pressing plate (22), which is connected with the first feeding opening (16). Bottom pressing plate (22) is slidingly connected with smashing rod (21) at the corresponding position, and smashing rod (21) lower end is fixedly connected with upper pressing plate (23), and the upper pressing plate (23) and bottom pressing plate (22) are all opened There are some smashing teeth, a spring is connected between the smashing lever (21) and the top plate of the blanking inclined tube (161), the smashing lever (21) is fixedly embedded with a gear bar, and the upper end of the blanking inclined tube (161) is fixedly connected with a smashing Hitting the motor, the rotating shaft of the smashing motor is fixedly connected with an incomplete gear, and the incomplete gear is meshed with the gear bar. The inclined feeding tube (161) communicates with the feeding cylinder (31) at the top of the crushing device (3), and an inverted conical funnel (311) is arranged below the feeding end of the connection, and the funnel (311) below A cross-shaped first spreading rack (312) is horizontally fixed on the inner wall of the lower barrel (31), and a cross-shaped second spreading rack (313) is arranged below the first spreading rack (312). There is an angle between the material rack (313) and the first material spreading frame (312) in the horizontal direction, and the included angle is 45 degrees. cone(314); The bottom of the lower barrel (31) extends into the crushing device (3), and a crushing motor (36) is fixed at the bottom of the crushing device (3). The crushing motor (36) is vertically arranged, and its top passes through the drive shaft. It is fixedly connected with the center of the bottom surface of the conical crushing roller (35), and the outer cover of the crushing roller (35) has a wear-resistant shell, and the bottom end of the lower material cylinder (31) extends into the wear-resistant shell, and the wear-resistant shell The body is divided into the first crushing part (321), the second crushing part (322) and the third crushing part (323) from top to bottom, the first crushing part (321), the second crushing part (322) and the third crushing part Parts (323) are all truncated cones, and the cone angle is the same as that of the crushing roller (35), but the diameter of the bottom surface is from the first crushing part (321), to the second crushing part (322) to the third crushing part (323 ) decreases step by step, and the second feeding port (17) communicates with the second crushing part (322) through the second feeding inclined pipe (171); The bottom end of the third crushing part (323) communicates with a second lower material barrel (34), and the bottom end of the second lower material barrel (34) communicates with a hopper (37); The inclined blanking pipe (161) is provided with a lower concave part (191) with a hemispherical longitudinal section between the bottom platen (22) and the lower material cylinder (31), and a turning roller is positioned in the lower concave part (191). (19), the material turning plate is fixed on the material turning roller (19), the material turning plate is a curved panel, and its bending direction is consistent with the turning direction of the material turning roller (19), and the material turning roller (19) drives the material turning plate to the material Feeding in the direction of the cylinder (31); A first sieve plate is provided on the bottom surface of the inclined feeding tube (161) between the lower recess (191) and the bottom platen (22), and the inclined feeding tube between the lower recess (191) and the lower feeding cylinder (31) (161) There is a second sieve plate on the bottom surface. The first sieve plate and the second sieve plate are composed of sieve rods parallel to the inclined pipe (161) and equally spaced. The first sieve plate and the second sieve plate are The plate bottom is provided with the first cutting branch pipe (193) and the second cutting branch pipe (192), and the first cutting branch pipe (193) and the second cutting branch pipe (192) are all connected with the second cutting inclined pipe (171 ) connected. 2. The crushing device for coal mining according to claim 1, characterized in that, the first grate plate (13) is provided with a first grate comb (131), and the first grate comb (131) is perpendicular to the grate teeth Set, the first comb (131) is provided with comb teeth identical with the gap width between the comb teeth, a first electric push rod is fixed on the outer bushing (122), and the push-out end of the first electric push rod is connected to the The first comb (131) is fixedly connected. 3. The crushing device for coal mining according to claim 1, characterized in that, the second grate plate (14) is provided with a second grate comb (141), and the second grate comb (141) is perpendicular to the grate teeth Set, the second comb (141) is provided with comb teeth identical with the gap width between the comb teeth, and the two ends of the inner shaft (121) are fixed with a second electric push rod by a fixed rod, and the second electric push rod The push-out end is fixedly connected with the second comb (141). 4. The crushing device for coal mining according to claim 1, characterized in that, protrusions are fixed on the outer surface of the crushing roller (35). 5. The crushing device for coal mining according to claim 4, characterized in that, the outer surface of the crushing roller (35) fixes the crushing hammer (331) in the space corresponding to the first crushing part (321), and the second crushing The crushing teeth (332) are fixed in the space corresponding to the part (322), and the small crushing teeth (333) are fixed in the space corresponding to the third crushing part (323). 6. The crushing device for coal mine development according to any one of claims 1 to 5, characterized in that, the bottom surface of the pre-screening device (1) is between the first feeding port (16) and the second feeding port (17) is provided with a spacer (18), and the vertical section of spacer (18) is triangular, also comprises a baffle plate (15), and the material baffle plate (15) one end is connected with the second feeding opening (17) ) edges are fixedly connected, and the other end is fixed on the box body (100).