Coal mining machine drum crushing drum

Abstract

The present invention relates to a drum-type crushing roller for coal mining machines, comprising a roller body, a connecting plate, and a plurality of tooth seats and picks corresponding to each other, wherein the picks are fixed on the corresponding tooth seats, the tooth seats are distributed on the outer cylindrical surface of the roller body and are fixedly connected relative to the roller body, the tooth seats and picks are divided into multiple groups along the axial direction of the roller body, and the multiple tooth seats in each group are dispersedly arranged on a circumference of the outer cylindrical surface of the roller body, the distance from the tooth top of the pick to the outer cylindrical surface of the roller body is the largest in the middle group, and the distance from the tooth top of the pick to the outer cylindrical surface of the roller body is smaller for the groups closer to the two ends of the axial direction of the roller body, the connecting plate is coaxially fixed on one end of the axial direction of the roller body, and a plurality of sawtooth-type crushing teeth are dispersedly arranged along the circumference on the cylindrical surface of the connecting plate. The present invention has a stronger coal crushing ability and a longer service life.

Description

Technical Field

[0001] The invention relates to a roller on a crushing device for a coal mining machine, belonging to the technical field of coal mining equipment. Background Art

[0002] With the advancement of coal mining technology and equipment in recent years, more and more thick and extra-thick coal seams have begun to adopt one-time mining technology and equipment. The higher the mining height, the greater the probability of spalling. The large pieces of coal that have spalled down fall onto the scraper conveyor by gravity and need to be crushed by a crushing device.

[0003] Since the scraper conveyor is always in operation, the coal blocks that fall into the middle of the scraper conveyor can be transported away in a short time, while the coal blocks that fall on the sides of the scraper conveyor are more difficult to transport away, resulting in the overall "concave" shape of the coal blocks, with the middle low and the sides high, forming a Figure 1 The lump coal stacking state is shown.

[0004] The distances from the tops of all the picks on the drum of the existing crushing device to the outer cylindrical surface of the drum body are equal, that is, the tops of all the picks are located on the same cylindrical surface. Figure 1 In the shown lump coal accumulation state, the picks on the sections close to the two ends of the drum body first contact the lump coal, while the picks on the middle section line are difficult to contact the lump coal. The workload of the picks varies, and each pick cannot play a role evenly, resulting in low coal breaking efficiency, heavy workload of the picks on both sides and low service life.

[0005] With the gradual increase of coal flakes, it has become an urgent problem to make the crushing drum have stronger crushing capacity under the premise of unchanged power. Summary of the invention

[0006] The purpose of the invention is to provide a drum-type crushing roller for a coal mining machine, which has a stronger coal crushing ability and a longer service life.

[0007] The main technical solutions of the present invention are:

[0008] A drum-type crushing drum for a coal mining machine comprises a drum body and a plurality of one-to-one corresponding tooth seats and cutting teeth, wherein the cutting teeth are fixed on the corresponding tooth seats, the tooth seats are distributed on the outer cylindrical surface of the drum body and are fixedly connected relative to the drum body, the tooth seats and cutting teeth are divided into a plurality of groups along the axial direction of the drum body, and a plurality of tooth seats in each group are dispersedly arranged on a circumference of the outer cylindrical surface of the drum body, the distance from the tooth top of the cutting teeth to the outer cylindrical surface of the drum body is the largest in the middle group, and the distance from the groups closer to the two ends of the axial direction of the drum body is smaller, and the envelope curve of the tooth tops of all the cutting teeth forms a drum-shaped structure which is high in the middle and low at both ends.

[0009] The tooth holder and the cutting teeth can be divided into five groups along the axial direction of the drum body, which are respectively the first group, the second group, the third group, the fourth group and the fifth group from one end to the other end of the axial direction of the drum body.

[0010] The drum-type crushing roller for the coal mining machine also includes a first pad and a second pad. The tooth seats of the second and fourth groups are fixed on the first pad, and the tooth seats of the third group are fixed on the second pad. The first pad and the second pad are both fixed on the outer cylindrical surface of the roller body. The height of the first pad is smaller than that of the second pad. The tooth seats of the first and fifth groups are directly fixed on the outer cylindrical surface of the roller body. The specifications of all tooth seats are the same, and the specifications of the cutting teeth are the same.

[0011] The tooth seats of the first group, the third group and the fifth group are arranged along a plurality of straight generatrix lines of the outer cylindrical surface of the roller body in the axial direction, with one tooth seat of the first group, the third group and the fifth group on each generatrix; the tooth seats of the second group and the fourth group are arranged along a plurality of straight generatrix lines of the outer cylindrical surface of the roller body in the axial direction, with one tooth seat of the second group and the fourth group on each generatrix, and are staggered with the tooth seats of the first group, the third group and the fifth group in the circumferential direction.

[0012] The installation directions of the three picks of the first, third and fifth groups corresponding to the same busbar are consistent, and the installation directions of the two picks of the second and fourth groups corresponding to the same busbar are consistent.

[0013] All the cutting teeth are installed in a clockwise or counterclockwise direction along the circumference of the drum body.

[0014] The pairs of tooth seats and cutting teeth in the same group are evenly distributed along the circumference.

[0015] The included angles of the overhanging directions of all the cutting teeth relative to the outer cylindrical surface of the drum body are equal.

[0016] The drum-type crushing roller for coal mining machine also includes a connecting plate, which is coaxially fixed on one axial end of the roller body, and a plurality of sawtooth-type crushing teeth are preferably dispersedly arranged along the circumference on the cylindrical surface of the connecting plate.

[0017] A plurality of sawtooth crushing teeth are evenly distributed along the circumference of the connecting disk.

[0018] The beneficial effects of the present invention are:

[0019] The drum-shaped structure with a high middle and low ends of the present invention can match and fit with the "concave"-shaped coal block accumulation state on the scraper conveyor, ensuring that all picks can effectively participate in the crushing work, thereby reducing pick loss and greatly improving crushing efficiency.

[0020] The present invention adopts a five-section line design, and the picks of adjacent sections are staggeredly distributed, which increases the number of pick arrangements on the one hand, and improves the coal breaking capacity of the drum on the other hand.

[0021] In the present invention, a plurality of sawtooth-shaped crushing teeth are dispersedly arranged along the circumference on the cylindrical surface of the connecting disk, thereby further improving the coal crushing capacity and service life of the drum. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the state of coal accumulation on the scraper conveyor in the prior art;

[0023] Figure 2 It is a schematic structural diagram of an embodiment of the present invention. Description of the drawings:

[0025] 1. Cutting teeth; 2. Tooth seat; 3. First gasket; 4. Second gasket; 5. Drum body; 6. First section line; 7. Second section line; 8. Drum-shaped structure; 9. Sawtooth crushing teeth; 10. Fourth section line; 11. Fifth section line; 12. Third section line; 13. Connecting plate. DETAILED DESCRIPTION

[0026] The present invention discloses a drum-type crushing roller for a coal mining machine, such as Figure 2 As shown, it includes a cylindrical drum body 5 and a plurality of tooth seats 2 and picks 1 corresponding to each other. The picks are fixed on the corresponding tooth seats to form a cutting system. The tooth seats are distributed on the outer cylindrical surface of the drum body and are fixedly connected relative to the drum body. The tooth seats and picks are divided into multiple groups along the axial direction of the drum body. The multiple tooth seats in each group are dispersedly arranged on a circumference of the outer cylindrical surface of the drum body. The distance from the tooth top of the pick to the outer cylindrical surface of the drum body is the largest in the middle group, and the closer to the two ends of the axial direction of the drum body, the smaller the distance is, so that the envelope curve of the tooth top of all the picks forms a "drum-shaped structure" 8 with a high middle and low ends.

[0027] The "convex" structure of the drum-shaped crushing roller of the present invention can match and fit with the "concave" shaped coal block accumulation state on the scraper conveyor, ensuring that all cutting teeth can effectively participate in the crushing work, thereby reducing cutting tooth loss and greatly improving crushing efficiency.

[0028] The tooth holder and the pick can be divided into five groups along the axial direction of the drum body, which are the first group, the second group, the third group, the fourth group and the fifth group from one end of the axial direction of the drum body to the other end. Here, each circumference is called a section line, and the first to fifth groups correspond to the first section line 6, the second section line 7, the third section line 12, the fourth section line 10 and the fifth section line 11 respectively.

[0029] The drum-type crushing roller for the coal mining machine may also include a first pad 3 and a second pad 4, the tooth seats of the second and fourth groups are fixed on the first pad, the tooth seats of the third group are fixed on the second pad, the first pad and the second pad are both fixed on the outer cylindrical surface of the roller body, the height of the first pad is smaller than that of the second pad, and the tooth seats of the first and fifth groups are directly fixed on the outer cylindrical surface of the roller body, so as to realize a "drum-shaped structure" 8 that is high in the middle and low at both ends. In this case, it is preferred that all tooth seats have the same specifications, and the specifications of the cutting teeth are the same, so as to simplify manufacturing and assembly. In this embodiment, the first pad and the second pad are both welded to the roller body.

[0030] The tooth seats of the first, third and fifth groups are arranged along the multiple generatrix lines of the outer cylindrical surface of the drum body in the axial direction, and each generatrix has one tooth seat of the first, third and fifth groups. The tooth seats of the second and fourth groups are arranged along the multiple generatrix lines of the outer cylindrical surface of the drum body in the axial direction, and each generatrix has one tooth seat of the second and fourth groups, and are staggered with the tooth seats of the first, third and fifth groups in the circumferential direction. The drum as a whole adopts a five-section design, and the picks of adjacent sections are staggered. This structure increases the number of pick arrangements on the one hand, and improves the coal breaking capacity of the drum on the other.

[0031] The installation directions of the three picks of the first, third and fifth groups corresponding to the same busbar are consistent, and the installation directions of the two picks of the second and fourth groups corresponding to the same busbar are consistent.

[0032] The installation direction of each pick is deviated from the corresponding radial direction of the drum body by a certain angle, and the axis of the pick is preferably located on the plane formed by the corresponding section line. All picks are installed in a clockwise or counterclockwise direction along the circumference of the drum body.

[0033] The pairs of tooth seats and cutting teeth in the same group are evenly distributed along the circumference.

[0034] Furthermore, the angles of the overhanging directions of all the picks relative to the outer cylindrical surface of the drum body are equal, so that the forces on the picks are relatively uniform, thereby improving the coal breaking capacity of the drum and increasing the service life of the drum.

[0035] The drum-type crushing roller for the coal mining machine also includes a connecting plate 13, which is coaxially fixed on one axial end of the roller body. A plurality of serrated crushing teeth 9 are preferably dispersed along the circumference on the cylindrical surface of the connecting plate, so that more teeth near one end of the connecting plate are involved in crushing, thereby further improving the coal crushing capacity and service life of the roller.

[0036] The plurality of sawtooth crushing teeth are preferably evenly distributed along the circumference of the connecting disk.

Claims

1. A method for crushing lump coal, characterized in that: A drum-type crushing drum for a coal mining machine is used to crush the coal lumps piled in a concave-shaped structure with a low middle and high two sides on a scraper conveyor. The drum-type crushing drum for the coal mining machine comprises a drum body and a plurality of one-to-one corresponding tooth seats and cutting teeth. The cutting teeth are fixed on the corresponding tooth seats. The tooth seats are distributed on the outer cylindrical surface of the drum body and are fixedly connected relative to the drum body. The tooth seats and the cutting teeth are divided into multiple groups along the axial direction of the drum body. The multiple tooth seats in each group are dispersedly arranged on a circumference of the outer cylindrical surface of the drum body. The distance from the tooth top of the cutting tooth to the outer cylindrical surface of the drum body is the largest in the middle group, and the distance between the groups closer to the two ends of the axial direction of the drum body is smaller. The envelope curved surface of the tooth tops of all the cutting teeth forms a drum-shaped structure with a high middle and low two ends. The drum-shaped structure with a high middle and low two ends of the drum-type crushing drum for the coal mining machine is used to fit the coal lumps piled in the concave-shaped structure, so that all the cutting teeth are involved in the crushing work.

2. The method for crushing lump coal according to claim 1, characterized in that: The tooth holder and the cutting teeth are divided into five groups along the axial direction of the drum body, which are respectively the first group, the second group, the third group, the fourth group and the fifth group from one end to the other end of the axial direction of the drum body.

3. The method for crushing lump coal according to claim 2, characterized in that: The drum-type crushing roller for the coal mining machine also includes a first pad and a second pad. The tooth seats of the second and fourth groups are fixed on the first pad, and the tooth seats of the third group are fixed on the second pad. The first pad and the second pad are both fixed on the outer cylindrical surface of the roller body. The height of the first pad is smaller than that of the second pad. The tooth seats of the first and fifth groups are directly fixed on the outer cylindrical surface of the roller body. The specifications of all tooth seats are the same, and the specifications of the cutting teeth are the same.

4. The method for crushing lump coal according to claim 3, characterized in that: The tooth seats of the first group, the third group and the fifth group are arranged along a plurality of straight generatrix lines of the outer cylindrical surface of the roller body in the axial direction, with one tooth seat of the first group, the third group and the fifth group on each generatrix; the tooth seats of the second group and the fourth group are arranged along a plurality of straight generatrix lines of the outer cylindrical surface of the roller body in the axial direction, with one tooth seat of the second group and the fourth group on each generatrix, and are staggered with the tooth seats of the first group, the third group and the fifth group in the circumferential direction.

5. The method for crushing lump coal according to claim 4, characterized in that: The installation directions of the three picks of the first, third and fifth groups corresponding to the same busbar are consistent, and the installation directions of the two picks of the second and fourth groups corresponding to the same busbar are consistent.

6. The method for crushing lump coal according to claim 5, characterized in that: All the cutting teeth are installed in a clockwise or counterclockwise direction along the circumference of the drum body.

7. The method for crushing lump coal according to claim 6, characterized in that: The pairs of tooth seats and cutting teeth in the same group are evenly distributed along the circumference.

8. The method for crushing lump coal according to claim 7, characterized in that: The included angles of the overhanging directions of all the cutting teeth relative to the outer cylindrical surface of the drum body are equal.

9. The method for crushing lump coal according to claim 1, 2, 3, 4, 5, 6, 7 or 8, characterized in that: The drum-type crushing roller for coal mining machine also includes a connecting plate, which is coaxially fixed on one axial end of the roller body, and a plurality of sawtooth-type crushing teeth are dispersedly arranged along the circumference on the cylindrical surface of the connecting plate.

10. The method for crushing lump coal according to claim 9, characterized in that: A plurality of sawtooth crushing teeth are evenly distributed along the circumference of the connecting disk.

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