Thin seam short span coal cutter split flow loading structure

Abstract

The present application relates to a kind of short span coal cutter of thin coal seam short span, including front and rear main body part shell of front and rear fixed connection and swing arm shell articulated in the left end or right end of front main body part shell, the length of front and rear main body part shell in left and right direction is shorter than rear main body part shell, swing arm is located in front of rear main body part shell, the main body of swing arm shell is the arm support extending left and right, arm support is drum end, near drum section, near articulated section and articulated end in order from one end to the other end, drum end is bent downward relative to near drum section, the bottom of near drum section is higher than the bottom of remaining parts, drum end, near drum section and near articulated section form arch with near drum section as vault, the rear of main body part shell is provided with loading cavity, the front end of loading cavity in left and right direction is opposite and communicated with the rear end of hole formed below vault.This application loading effect is obviously improved, the power consumption of cutting motor is greatly reduced, and drum wear and traction resistance are significantly reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to a coal mining machine loading channel structure, which can improve the loading effect of a coal mining machine for thin coal seams. BACKGROUND

[0002] The rocker arm of a thin coal seam mining machine with a suspended body usually adopts an arm support with a small bending angle at the drum end, or even a straight arm support structure. The main reason is that a certain amount of roof clearance needs to be left between the arm support with a small diameter drum and the support top beam, and with the high power of the rocker arm, the size between the transmission gear and the arm support increases, and the space requirements of the arm support are also increased. In this case, since there is basically no loading port below the arm support, the drum usually adopts an internal suspension method for cutting and loading, and the coal and rock is mainly loaded out from the outer end of the drum side arm support, so that only half of the drum blades are actually involved in loading, thereby causing the problem of poor loading effect of the thin coal seam mining machine.

[0003] For a thin coal seam mining machine with a suspended body, due to the influence of the suspended body, the machine body can only move forward after the drum loads out the cut coal and rock. However, due to the unsatisfactory loading effect, a large amount of cut coal and rock is stirred and rubbed in the circumferential direction with the drum, which not only increases the drum wear and the resistance of the coal mining machine, but also greatly increases the power consumption of the cutting motor, resulting in frequent overload, especially for rock cutting. SUMMARY

[0004] The present application aims to provide a thin coal seam short span mining machine split-flow loading structure, which significantly improves the loading effect, greatly reduces the power consumption of the cutting motor, and significantly reduces the drum wear and traction resistance.

[0005] The main technical solutions of the present application are as follows:

[0006] A thin coal seam short span mining machine split-flow loading structure, comprising a front main body part shell, a rear main body part shell fixedly connected to the rear of the front main body part shell, and a swing arm shell hinged to the left end or the right end of the front main body part shell, the length of the front main body part shell in the left-right direction is shorter than that of the rear main body part shell, and the swing arm is located in front of the rear main body part shell, the main body of the swing arm shell extends in the left-right direction, and the arm support sequentially comprises a drum end, a drum near segment, a hinge near segment, and a hinge end from one end to the other end, the drum end is bent downward relative to the drum near segment, the bottom surface of the drum near segment is higher than the bottom surfaces of the remaining parts, the drum end, the drum near segment, and the hinge near segment form an arch shape with the drum near segment as the arch top, the rear part of the main body part shell is provided with a loading cavity, the loading cavity is a groove extending from front to back with a downward slot, the rear end of the loading cavity is closed, and the front end of the loading cavity in the left-right direction is opposite to and communicates with the rear end of the hole formed below the arch top.

[0007] The top edge of the front end of the loading cavity is higher than the top edge of the rear end of the hole.

[0008] The bottom surface of the near-drum section is divided into two sections, the front section is a horizontal surface, and the rear section is an inclined surface with a low front and a high rear.

[0009] The top surface of the loading cavity is divided into two sections, the front section is a horizontal surface, and the rear section is an inclined surface with a high front and a low rear.

[0010] The surfaces surrounding the hole include the bottom surface of the near-drum section and two mutually facing outer convex circular-arc cylindrical surfaces on the drum end and the near-hinge section.

[0011] The arm support has a connecting arm extending forward from the arm support, and a front arm extending rightward or leftward from the connecting arm, the swing arm housing is hinged to the front body housing through the front arm and the hinge end.

[0012] The thin-seam short-span coal mining machine further comprises a conveyor, the conveyor is arranged below the rear body housing in a left-right direction, the loading cavity is located directly above the conveying groove of the conveyor, the hole and the front side groove top surface of the conveyor surround the front part of the inner loading channel, the loading cavity and the conveying surface of the conveying groove surround the rear part of the inner loading channel, and the front part and the rear part of the inner loading channel form the inner loading channel.

[0013] The drum is installed on the drum end, the outer surface of the drum end of the arm support and the space surrounded by the drum blades form the front part of the outer loading channel, the support shoe is arranged on the shovel plate of the conveyor behind the drum end, the support shoe is fixedly connected to the rear body housing, and the front part of the outer loading channel and the front part of the inner loading channel are separated in the left-right direction through the support shoe.

[0014] The surfaces surrounding the hole can further include a side surface of the connecting arm close to the drum end in the left-right direction, and the side surface is an inner concave circular-arc cylindrical surface.

[0015] The support shoe is provided with a top guide plate and two side guide plates in the left-right direction, the top guide plate is located above the side guide plates, the top guide plate is inclined in the left-right direction, is lower closer to the drum end, and the side guide plates are vertically arranged, and the rear side surfaces of the two side guide plates are respectively directed to the left rear and the right rear.

[0016] The rear part of the top surface of the near-drum section of the arm support is arranged as an inclined surface, the inclined surface is high in the front and low in the rear, and is lower closer to the drum end in the left-right direction.

[0017] The front body housing and the rear body housing form a left-right symmetrical T-shaped structure, the swing arm housing and the support shoe are arranged on the left and the right respectively and are symmetrical to the front body housing, and form two outer loading channels and inner loading channels which are left-right symmetrical.

[0018] The beneficial effects of the present application are as follows:

[0019] This invention utilizes a specially shaped swing arm housing boom to create an internal loading channel below the drum section of the boom. The simultaneous existence of both internal and external loading channels significantly improves the loading efficiency of the drum in a suspended coal mining machine.

[0020] The lower opening, with the near-drum section as the arch, and the top surface of the front side of the conveyor trough form the front part of the inner loading channel. The loading cavity and the conveying surface of the conveying trough form the rear part of the inner loading channel. At the same time, the rear top edge of the opening and the front top edge of the loading cavity maintain a certain dimensional relationship in the height direction, realizing the connection between the front and rear parts of the inner loading channel and ensuring that the coal flow smoothly enters the conveyor trough through the inner loading channel.

[0021] The external loading channel is formed by the outer surface of the boom's drum end and the drum blades, with an open space at the outer end, which facilitates the drum throwing coal and rock into the conveyor trough.

[0022] The support slipper is used to separate the front of the outer loading channel and the front of the inner loading channel in the left and right directions, so as to avoid the coal flow outside the center line of the drum from obstructing the coal flow inside when the coal mining machine moves, and to ensure that the coal and rock inside the drum can pass smoothly through the inner loading channel to the conveyor without being blocked by the coal flow in the outer loading channel.

[0023] Compared to existing coal mining machines that only have an external loading channel 01' (see...) Figure 8 In this case, the present invention has both external and internal loading channels, which work together to increase the axial conveying area of ​​the drum blades from 1 / 2 to nearly 3 / 4, significantly improving the loading effect, reducing the forward resistance of the machine body, and greatly reducing the cutting power consumption. Correspondingly, drum wear and traction resistance are also improved. Attached Figure Description

[0024] Figure 1 A schematic diagram of a coal mining machine equipped with the diversion loading structure of the present invention, in the working state of cutting coal while moving to the left;

[0025] Figure 2 A top sectional view of a coal mining machine equipped with the diversion loading structure of the present invention;

[0026] Figure 3 for Figure 2 The side view of the coal mining machine shown;

[0027] Figure 4 A top view of one embodiment of supporting the slipper;

[0028] Figure 5 A front view of one embodiment supporting the skateboard;

[0029] Figure 6 for Figure 1 Schematic diagram of the structure of the swing arm housing;

[0030] Figure 7 For Figure 1 Plan view of the oscillating arm in the direction of the pitch;

[0031] Figure 8 Schematic diagram of the outer loading channel formed by the existing structure of the oscillating arm of the coal mining machine.

[0032] Reference signs:

[0033] 1. oscillating arm; 11. oscillating arm housing; 111. front arm; 112. front part of the articulated end; 113. rear part of the articulated end; 114. connecting arm; 1142. side of the connecting arm near the drum end; 1144. oil cylinder accommodating cavity; 1152. rear part of the top surface of the near-drum section; 1153. rear part of the bottom surface of the near-drum section; 116. arm support; 1161. outer convex circular arc cylindrical surface on the inner side of the drum end; 1162. bottom surface of the near-drum section; 1163. outer convex circular arc cylindrical surface on the outer side of the near-articulated section; 12. cutting transmission mechanism; 13. drum; 141. bearing; 142. bearing;

[0034] 21. front main body part housing; 22. rear main body part housing; 221. loading cavity; 2214. rear part of the top surface of the loading cavity;

[0035] 3. cutting motor;

[0036] 4. height adjustment oil cylinder;

[0037] 5. support shoe; 51. support frame; 52. positioning pin; 53. screw; 54. shoe; 55. side guide plate; 56. top guide plate;

[0038] 9. conveyor; 91. shovel plate; 95. conveying groove; 991. outer loading channel; 992. inner loading channel;

[0039] 01'. outer loading channel of the existing coal mining machine. DETAILED DESCRIPTION

[0040] The application discloses a thin seam short-span coal mining machine split-flow loading structure (which can be simply referred to as a split-flow loading structure), like Figures 1-7As shown, the swing arm housing 11 includes a front body housing 21, a rear body housing 22 fixedly connected at the rear of the front body housing, and a swing arm 1 hingedly connected at the left end or right end of the front body housing. The front and rear body housings constitute the machine body of the coal mining machine. The front body housing is shorter in the left-right direction than the rear body housing, and the swing arm is located in front of the rear body housing. The main body of the swing arm housing is an arm support 116 extending in the left-right direction. A cutting transmission mechanism 12 is installed in the arm support. According to the distance of different parts of the arm support from the drum or the machine body, the arm support can be sequentially divided into a drum end, a near-drum section, a near-hinge section, and a hinge end from one end to the other end. The drum end is bent downward relative to the near-drum section, the bottom surface of the near-drum section is higher than the bottom surfaces of the other parts, and the drum end, the near-drum section, and the near-hinge section form an arch shape with the near-drum section as the arch top. The rear part of the main body housing is provided with a loading cavity 221, which is a groove extending from front to back with a notch facing downward. The loading cavity is not a through groove, and its rear end is closed. The front end of the loading cavity in the left-right direction is opposite and communicates with the rear end of the hole formed below the arch top, and the coal flow can enter the loading cavity through the hole. The hole and the corresponding loading cavity belong to the internal loading channel 992. By providing the arch structure on the arm support, a coal flow channel is added, which can finally guide the coal flow entering the channel into the conveying groove of the conveyor, thereby improving the coal loading effect.

[0041] The thickness of the near-drum section in the up-down direction is less than that of the near-hinge section and the hinge end.

[0042] The front body housing is a multi-chamber thin-walled frame structure, the rear body housing is basically a solid structure, and the left-right direction size of the front body housing is much smaller than that of the rear body housing, so that the center of gravity of the machine body is moved backward, improving the stability of the coal mining machine.

[0043] The top edge of the front end of the loading cavity is higher than the top edge of the rear end of the hole, which is beneficial to ensure that the coal flow can smoothly enter the loading cavity.

[0044] The bottom surface of the near-drum section, that is, the top surface of the hole, can be divided into front and rear sections, of which the front section is a horizontal surface and the rear section 1153 is an inclined surface with a low front and a high rear. The setting of the bottom surface of the near-drum section can guide the coal flow to move upward and backward in the hole.

[0045] The top surface of the loading cavity is preferably divided into front and rear sections, of which the front section is a horizontal surface and the rear section 2214 is an inclined surface with a high front and a low rear. The coal flow entering the loading cavity will move downward and backward after passing through a horizontal buffer zone, and then enter the conveying groove of the conveyor.

[0046] The surface surrounding the hole includes the bottom surface 1162 of the near-drum section and two mutually facing convex arc cylindrical surfaces 1161 and 1163 on the drum end and the near-hinge section.

[0047] The middle of the boom is provided with a connecting arm 114 which is suspended forward from the boom, and the connecting arm is provided with a front arm 111 which is suspended rightward or leftward from the connecting arm, and the swing arm shell is hinged with the front arm and a hinged end to the front body shell, specifically, the front arm and the front part 112 of the hinged end are respectively provided with coaxial front pin shaft mounting holes and rear pin shaft mounting holes, the rear part 113 of the hinged end is provided with an input gear 121 of a cutting transmission mechanism, the front and rear pin shaft mounting holes are respectively provided with bearings 141 and 142, and a cutting motor 3 is rotatably supported in the bearings 141 and 142 as a hinged pin shaft, and the cutting motor is fixed relative to the front body shell. The output shaft of the cutting motor is coaxially and transmissionally connected to the input gear. By taking the cutting motor as a whole as a pin shaft, the left and right lengths of the front body shell are shortened, which is equivalent to shortening the left and right lengths of the suspended body section of the coal mining machine, and the structure of the cutting mechanism is simplified.

[0048] The lower part of the connecting arm is provided with an oil cylinder accommodating cavity 1144 which extends leftward and rightward and is open downward, and the oil cylinder accommodating cavity is located below the front arm in the front and rear direction. An adjusting height oil cylinder 4 is installed in the oil cylinder accommodating cavity, one end of the adjusting height oil cylinder is hinged to the connecting arm, the other end is hinged to the front body shell, and the hinged axes at the two places both extend forward and backward. The extension and contraction of the adjusting height oil cylinder will drive the swing arm shell to swing upward and downward around the cutting motor, and then drive the swing arm shell to swing upward and downward. The adjusting height oil cylinder is arranged below the cutting motor, which not only makes full use of the space between the roof and the floor of the coal mining face, but also greatly shortens the left and right lengths of the front body shell (equivalent to the suspended body section) because it does not additionally occupy the left and right longitudinal space, and for a double-drum coal mining machine, the distance between the two drums is shortened, which provides convenience for the arrangement of the short body. The arrangement of the oil cylinder accommodating cavity provides a relatively clean working space for the swing of the adjusting height oil cylinder and the pipeline layout of the oil cylinder, ensures that the adjusting height oil cylinder can freely extend and contract and the swing arm shell can freely swing without being affected by coal and other mineral materials, and finally ensures that the maximum mining range is not affected.

[0049] The split loading structure of the short-span coal mining machine for thin coal seams further comprises a conveyor 9 which extends leftward and rightward and is arranged below the rear body shell 22, and the loading cavity is located directly above a conveying groove 95 of the conveyor. The front side groove top surface of the conveyor and the hole opening form a front part of an inner loading channel, the loading cavity and the conveying surface of the conveying groove form a rear part of the inner loading channel, and the front part and the rear part of the inner loading channel form an inner loading channel 992.

[0050] A drum 13 is installed on the drum end of the boom, and the outer surface of the drum end of the boom and the outer end open space surrounded by the drum blades constitute the front part of the outer loading channel 991. The rear of the drum end is preferably directly rearward, and the support shoe 5 is arranged on the shovel plate 91 of the conveyor. The support shoe is fixedly connected with the rear body part shell. The front part of the outer loading channel and the front part of the inner loading channel are separated in the left-right direction by the support shoe. The support shoe separates the coal flow on the inner and outer sides of the drum in the left-right direction, which can reduce the influence of the coal flow on the outer side of the drum center line on the coal flow on the inner side when the coal mining machine moves.

[0051] The support shoe can include a support frame 51, a positioning pin 52, a screw 53, and a shoe 54. The lower part of the support frame 51 is connected with the shoe. The upper part of the support frame 51 is positioned and connected with the rear body part shell through the positioning pin 52 and the screw 53.

[0052] The side surface 1142 of the connecting arm near the drum end, which surrounds the hole, can also include a concave circular cylindrical surface in the left-right direction, and is preferably coaxial with the drum. The side surface and the drum blades maintain a certain equidistant gap, which can improve the loading effect of the drum spiral conveying material.

[0053] The support shoe is provided with a top guide plate 56 and two side guide plates 55. The top guide plate is located above the side guide plates, and is inclined in the left-right direction, and is lower closer to the drum end. The side guide plates are vertically arranged, and the rear sides of the two side guide plates are respectively directed to the left rear and the right rear. The top guide plate can guide the coal falling thereon to the side guide plates, especially the outer side guide plates. The two side guide plates then divert the coal to the left rear and the right rear of the drum, so that the coal finally enters the conveying groove of the conveyor from the inner and outer loading channels. The top guide plate mainly guides the coal to the outer loading channel, thereby improving the loading effect of the outer loading channel.

[0054] The top surface rear part 1152 of the near-drum segment of the boom is preferably arranged as an inclined surface, which is high in front and low in back, and lower closer to the drum end in the left-right direction. The inclined surface can guide the coal thrown by the drum to the top of the boom to the top guide plate, so that the top guide plate more fully plays a role in guiding the coal.

[0055] The front body part shell and the rear body part shell form a left-right symmetrical T-shaped structure, and the swing arm shell and the support shoe are arranged left-right symmetrically relative to the front body part shell, forming two left-right symmetrical outer loading channels and inner loading channels. This structure is used on a double-drum coal mining machine.

[0056] Unless otherwise specified, the front and rear directions herein refer to the directions close to and away from the coal wall, respectively.

Claims

1. A diversion loading structure for a thin coal seam short-span coal mining machine, characterized in that: The system includes a front main body shell, a rear main body shell fixedly connected to the rear of the front main body shell, and a swing arm shell hinged to the left or right end of the front main body shell. The left-right length of the front main body shell is shorter than that of the rear main body shell. The swing arm is located in front of the rear main body shell. The main body of the swing arm shell is a left-right extending arm. From one end to the other, the arm consists of a roller end, a near-roller section, a near-hinged section, and a hinge end. The roller end is bent downwards relative to the near-roller section, and the bottom surface of the near-roller section is higher than the bottom surface of the rest of the components. The roller end, the near-roller section, and the near-hinged section form a shape with the near-roller section as the base. The arched shape of the dome and the rear of the main body shell are provided with a loading cavity. The loading cavity is a groove that extends from front to back with the opening facing downward. The rear end of the loading cavity is closed. The front end of the loading cavity in the left and right directions is directly opposite and connected to the rear end of the opening formed below the dome. The middle of the boom is provided with a connecting arm that extends forward from the boom. The connecting arm is provided with a forearm that extends to the right or left from the connecting arm. The swing arm shell is hinged to the front main body shell through the forearm and the hinge end. The connecting arm extends downward beyond the bottom surface of the middle of the boom. The surface surrounding the opening also includes the side of the connecting arm near the drum end in the left and right directions.

2. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 1, characterized in that: The top edge of the loading cavity front end is higher than the top edge of the opening rear end.

3. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 2, characterized in that: The bottom surface of the near-roll section is divided into two sections: the front section is a horizontal plane, and the rear section is an inclined plane that is lower in the front and higher in the back.

4. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 3, characterized in that: The top surface of the loading cavity is divided into two sections: the front section is a horizontal plane, and the rear section is a sloping plane that is higher in the front and lower in the rear.

5. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 4, characterized in that: The surfaces surrounding the opening include the bottom surface near the roller section and two outwardly convex cylindrical surfaces facing each other on the roller end and near the hinge section.

6. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claims 1, 2, 3, 4, or 5, characterized in that: It also includes a conveyor, which extends to the left and right and is arranged below the rear main body shell. The loading cavity is located directly above the conveying trough of the conveyor. The opening and the top surface of the front side of the conveyor trough form the front part of the inner loading channel. The loading cavity and the conveying surface of the conveying trough form the rear part of the inner loading channel. The front and rear parts of the inner loading channel constitute the inner loading channel.

7. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 6, characterized in that: A roller is installed on the roller end. The outer surface of the roller end of the boom and the outer open space formed by the roller blades constitute the front part of the outer loading channel. A support slipper is provided behind the roller end and on the shovel plate of the conveyor. The support slipper is fixedly connected to the rear main body shell. The front part of the outer loading channel and the front part of the inner loading channel are separated in the left and right direction by the support slipper.

8. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 7, characterized in that: The side of the connecting arm near the roller end in the left and right directions is a concave arc cylindrical surface.

9. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 8, characterized in that: The support shoe is provided with a top guide plate and two side guide plates on the left and right. The top guide plate is located above the side guide plates and is inclined in the left and right directions, becoming lower as it gets closer to the roller end. The side guide plates are all vertically arranged, and the rear sides of the left and right side guide plates face the left rear and right rear respectively.

10. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 9, characterized in that: The rear part of the top surface of the near-drum section of the boom is set as an inclined surface, which is higher in the front and lower in the back, and becomes lower as it gets closer to the drum end in the left-right direction.

11. The diversion loading structure for a thin coal seam short-span coal mining machine as described in claim 7, characterized in that: The front main body shell and the rear main body shell form a T-shaped structure that is symmetrical from left to right. There is one swing arm shell and one support slipper on each side, which are arranged symmetrically from left to right relative to the front main body shell, forming two external loading channels and an internal loading channel that are symmetrical from left to right.

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