Conical roller cutting device

Abstract

The utility model provides a conical roller cutting device. The conical roller cutting device comprises a crawler walking device, a pair of rocker arms and a pair of conical spiral rollers, the conical spiral roller is arranged at one end of the rocker arm through a driving motor, the rocker arm is installed at the front end and the rear end of the crawler walking device in a lifting mode, and the rocker arm drives the conical spiral roller to incline towards one side of a mining face of a mineral aggregate layer. The cross section of the conical spiral roller is in a conical shape which is gradually shrunk towards one side of a mining surface of a mineral aggregate layer, so that the mining surface after cutting is vertically formed into an inclined slope surface, and a plurality of cutting teeth are distributed on the spiral peripheral surface of the conical roller. The device can prevent wall caving during continuous mining of the strip mine, the mining safety risk is reduced, the running stability of the roller in the mining process is ensured, and back-and-forth continuous mining without turning around is realized.

Description

Technical Field

[0001] The utility model relates to the field of open-pit mining machines, in particular to a conical drum cutting device. Background Art

[0002] Existing coal mining machines generally consist of a body that can move along a scraper conveyor and a cutting mechanism connected to both ends of the body. The cutting mechanism consists of a rocker arm hinged to the body at one end and a cutting drum connected to the other end of the rocker arm. The cutting drum is adjusted in height up and down by a hydraulic cylinder hinged to the body at one end and to the rocker arm at the other end. During coal mining, because the cutting drum is vertical up and down, the coal mining face is also vertical up and down. It cannot prevent spalling when used for large mining height working faces. To prevent spalling, currently, most methods are used to prevent spalling through dynamic pressure water injection through shallow holes in the coal seam, to prevent spalling of the coal wall and roof collapse in front of the frame through hydraulic supports, to prevent spalling of the coal wall by grouting into the coal wall, and to prevent spalling by tilting the entire coal mining machine forward. However, the above methods have the defects of increasing the mining process steps or posing production safety hazards.

[0003] In order to better prevent the coal spalling, the invention patent with the authorization announcement number CN107654229B discloses a large mining height anti-slab coal mining machine, the two ends of the machine body are respectively connected to the rotating mechanism and the cutting mechanism; the rotating mechanism is composed of a housing, a rotating motor installed in the housing and its transmission mechanism and two auxiliary hydraulic cylinders installed on the rotating mechanism housing and the machine body housing; the rocker arm of the cutting mechanism is connected to the height adjustment hydraulic cylinder installed on the rotating mechanism housing; the cutting drum is eccentric. The coal mining machine can tilt the cutting mechanism to one side of the mining coal wall through the rotating mechanism, and the coal wall after cutting presents a certain inclination angle, which can effectively prevent the coal spalling without external reinforcement; when the rotating mechanism rotates, the two auxiliary hydraulic cylinders are the main force-bearing components, and the cutting height of the cutting drum is adjusted by the height adjustment hydraulic cylinder installed on the rotating mechanism housing and the rocker arm. The equipment is not easy to be damaged during operation, which can ensure safe production; after the cutting drum is tilted, the upper and lower end lines remain horizontal, which can ensure the horizontal advancement of the mining working face. However, the cutting drum in the large-mining-height anti-slab coal mining machine is an irregular structural component, and the center axis of the cutting drum does not coincide with the rotation axis, resulting in an unstable mining movement process. Utility Model Content

[0004] In order to prevent the slab from breaking during continuous mining in open pit mines, reduce the safety risk of mining, ensure the smooth operation of the drum during the mining process, and realize continuous mining without turning around, the technical scheme adopted by the utility model is: a conical drum cutting device, including a crawler walking device, a pair of rocker arms and a pair of conical spiral drums;

[0005] The conical spiral drum is arranged at one end of the rocker arm through a driving motor. The driving motor drives the planetary gear set to drive the conical spiral drum to rotate for mining operations. The rocker arm can be raised and lowered and installed at the front and rear ends of the crawler walking device. The rocker arm drives the conical spiral drum to tilt toward the mining surface of the mineral layer. The cross-sectional shape of the conical spiral drum is a cone that gradually shrinks toward the mining surface of the mineral layer, so that the mining surface after cutting is vertically formed into an inclined slope. A plurality of cutting teeth are arranged on the outer peripheral surface of the conical drum spiral.

[0006] Based on the above, in order to facilitate installation and maintenance, the pair of conical spiral rollers have the same specifications.

[0007] Based on the above, in order to ensure that the slope formed after cutting can be connected up and down, the pair of rocker arms are inclined at the same angle to one side of the mineral layer slope.

[0008] Based on the above, in order to ensure that the bottom surface of the mining surface of the ore layer after mining is flat, during mining, the lowermost side of the circumferential surface of the conical spiral drum is in a horizontal state.

[0009] Based on the above, in order to avoid missing the ore layer during mining, during mining, the mining faces of the pair of conical spiral drums are connected up and down.

[0010] Based on the above, during mining, a pair of rocker arms are respectively installed at the front and rear ends of the inner side of the crawler walking device through a height adjustment cylinder, and the lifting states of the pair of rocker arms are different.

[0011] Based on the above, a rocker arm articulated seat is provided at one end of the rocker arm, and the rocker arm is articulated with the crawler walking device through the rocker arm articulated seat.

[0012] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the conical drum cutting device provided by the utility model designs the cutting drum in the coal mining machine into a conical spiral drum with a small diameter close to the ore layer and a large diameter outside, so that when the rocker arm and the cutting drum are used to cut the ore layer, the side wall of the cut ore layer can form a slope of a specific angle, thereby preventing the open-pit mine from spalling during continuous mining. At the same time, because the conical spiral drum has a frustum-shaped structure and a relatively regular shape, it is less difficult to process.

[0013] Furthermore, by arranging rocker arms at the front and rear ends of the crawler walking device respectively, and installing the conical spiral roller on both rocker arms, continuous mining without turning back and forth can be achieved by controlling the lifting and lowering states of the two rocker arms during continuous mining of the open-pit mine. At the same time, it also ensures that the side walls of the ore layer can form a slope of a certain angle regardless of forward mining or return mining.

[0014] Therefore, the conical drum cutting device can prevent slagging during continuous mining in open-pit mines, reduce mining safety risks, and realize continuous mining without turning around. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The utility model is a schematic diagram of the end structure of the conical drum cutting device provided by the utility model.

[0016] Figure 2 It is a side structural schematic diagram of a conical drum cutting device provided by the utility model.

[0017] Figure 3 and Figure 4 It is a partial structural schematic diagram of the conical drum cutting device provided by the utility model.

[0018] In the figure: 1. crawler walking device; 2. star wheel shovel; 3. scraper conveyor; 4. left conical spiral drum, 41. oblique outer peripheral surface; 42. drum base; 5. belt conveyor; 6. rocker arm; 7. right conical spiral drum; 8. shovel lifting cylinder; 9. rocker arm articulated seat; 10. drive motor; 11. height adjustment cylinder; 12. rotating mechanism. DETAILED DESCRIPTION

[0019] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0020] Example 1

[0021] This embodiment provides a conical drum cutting device, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, it comprises a crawler walking device 1, a pair of rocker arms 6 and a pair of conical spiral drums. For the convenience of distinction, the pair of conical spiral drums can be divided into a left conical spiral drum 4 and a right conical spiral drum 7 according to the installation position.

[0022] The conical spiral drum is arranged at one end of the rocker arm through a driving motor 10, and the driving motor drives the planetary gear set to drive the conical spiral drum to rotate to perform mining operations.

[0023] The rocker arm 6 can be lifted and lowered at the front and rear ends of the crawler walking device 1, and the rocker arm 6 drives the conical spiral drum to tilt toward the mining surface of the ore layer. The cross-sectional shape of the conical spiral drum is a cone that gradually shrinks toward the mining surface of the ore layer, so that the mining surface after cutting is vertically formed into an inclined slope, and a plurality of cutting teeth are arranged on the outer peripheral surface of the conical drum spiral.

[0024] Specifically, the outer circumference of the drum base 42 of the conical spiral drum is inclined toward one side of the mineral layer slope, forming a vertical cutting surface with a frustum-shaped structure, and a plurality of cutting teeth are distributed on the inclined outer circumference 41 of the conical spiral drum.

[0025] In this embodiment, in order to facilitate the interchange of the front and rear lifting states, a pair of rocker arms 6 are installed at the front and rear ends of the inner side of the crawler walking device 1 through a height adjustment cylinder 11. A rocker arm articulation seat 9 is provided at one end of the rocker arm, and the rocker arm 6 is articulated with the crawler walking device 1 through the rocker arm articulation seat 9.

[0026] Example 2

[0027] This embodiment provides a conical drum cutting device, which is different from the embodiment 1 mainly in that in this embodiment: in order to avoid missing the ore layer during mining, during mining, the mining surfaces of a pair of conical spiral drums are connected up and down. The front and rear ends of the crawler walking device 1 are respectively provided with a rotating mechanism 12, and the rocker arm is installed on the rotating mechanism. The rotating mechanism can be a rotating motor or a structure in the invention patent with the authorization announcement number CN107654229B.

[0028] Example 3

[0029] This embodiment provides a conical roller cutting device, which is different from Embodiment 1 or Embodiment 2 mainly in that, in this embodiment: in order to facilitate installation and maintenance, the pair of conical spiral rollers have the same specifications.

[0030] Example 4

[0031] This embodiment provides a conical drum cutting device, which is different from the first embodiment or the second embodiment mainly in that in this embodiment: in order to ensure that the slope formed after cutting can be connected up and down, the pair of rocker arms are inclined at the same angle to the mining surface of the ore layer. In order to ensure that the bottom surface of the mining surface of the ore layer after mining is flat, during mining, the lowermost side of the circumferential surface of the conical spiral drum is in a horizontal state.

[0032] Specifically, the front and rear ends of the crawler walking device can be directly provided with oblique mounting seats for mounting the rocker arm hinge seats. At the same time, a rotatable rotating mechanism can be provided to drive the pair of rocker arms to tilt toward the mining surface of the ore layer through the rotation of the rotating mechanism.

[0033] Specifically, the front and rear ends of the crawler walking device are also provided with star wheel shovel boards 2 which can be lifted and lowered by shovel board lifting cylinders 8. The star wheel shovel board 2 is located below the conical spiral drum, and the discharge end of the star wheel shovel board is connected with a scraper conveyor 3, and the discharge end of the scraper conveyor 3 is provided with a belt conveyor 5. The star wheel shovel board includes a shovel board, a motor seat, a driving motor, a rotating disk, a left star wheel, and a right star wheel; the shovel board is hingedly mounted on the crawler walking device, the motor seat is mounted on the back of the shovel board, the driving motor is mounted on the motor seat, and the rotating disk is connected to the output shaft of the driving motor; the left star wheel and the right star wheel are mounted on the rotating disk, and the materials are pushed onto the scraper conveyor through the rotation of the left star wheel and the right star wheel.

[0034] Specifically, when the conical drum cutting device provided by the utility model is used to mine a mineral layer, the specific steps are as follows:

[0035] During the first mining, the crawler walking device is first moved to one side parallel to the mining surface of the ore, and then the cutting is performed by an oblique cutting method, and the coal is cut normally after the crawler walking device body is adjusted;

[0036] During normal coal cutting, the rocker arm at the front end of the crawler travel device rises to cut the upper layer of ore, and the rocker arm at the rear end of the crawler travel device falls to cut the lower layer of ore. At the same time, the star wheel shovel at the rear end of the crawler travel device is closed, and the star wheel shovel at the front end is opened. The star wheel shovel at the front end is used to collect the upper layer of ore cut this time, and the cut lower layer of ore will be collected during the return trip;

[0037] On the return journey, the states of a pair of rocker arms and a pair of star wheel shovels are interchanged, and the mining layer is directly retreated to collect and transport the cut ore. On the return journey, the star wheel shovels collect the reserved lower layer ore and the upper layer ore cut this time together.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A conical drum cutting device, characterized in that: It includes a crawler walking device, a pair of rocker arms and a pair of conical spiral drums; The conical spiral drum is arranged at one end of the rocker arm through a driving motor. The rocker arm can be lifted and lowered at the front and rear ends of the crawler walking device. The rocker arm drives the conical spiral drum to tilt toward the mining surface of the mineral layer. The cross-sectional shape of the conical spiral drum is a cone that gradually shrinks toward the mining surface of the mineral layer, so that the mining surface after cutting is vertically formed into an inclined slope. A plurality of cutting teeth are arranged on the outer peripheral surface of the conical drum spiral.

2. The conical drum cutting device according to claim 1, characterized in that: The pair of conical spiral rollers have the same specifications.

3. The conical drum cutting device according to claim 1, characterized in that: The pair of rocker arms are inclined at the same angle toward the mining surface of the ore layer.

4. The conical drum cutting device according to claim 1, 2 or 3, characterized in that: During mining, the lowermost side of the circumferential surface of the conical spiral drum is in a horizontal state.

5. The conical drum cutting device according to claim 1, characterized in that: During mining, the mining faces of the pair of conical spiral drums are connected up and down.

6. The conical drum cutting device according to claim 1, 2, 3 or 5, characterized in that: A pair of rocker arms are respectively installed at the front and rear ends of the inner side of the crawler walking device through a height adjustment cylinder, and the lifting states of the pair of rocker arms are different.

7. The conical drum cutting device according to claim 6, characterized in that: A rocker arm articulated seat is arranged at one end of the rocker arm, and the rocker arm is articulated with the crawler walking device via the rocker arm articulated seat.

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