Track protection device for mining machines

Abstract

The present invention relates to an orbit protection device for a mining machine, which includes a protection net and a rolling body. The protection net is inclined with the front lower and the rear higher and covers above the orbit of the conveyor. The rear edge of the protection net is fixed. A pair of rolling bodies are symmetrically installed on the left and right sides of the walking box of the mining machine. The ends of the rolling body close to and away from the walking box are respectively called the proximal end and the distal end. The working surface of the rolling body main body is a smooth space curved surface with a concave middle part. The height of the working surface gradually increases from the distal end to the proximal end. The parts of the working surface close to the distal end and the proximal end are respectively smooth concave curved surfaces with the front lower and the rear higher and the front higher and the rear lower. A top eaves extending from the proximal end to the distal end is arranged on the upper part of the rolling body, and the lower surface of the top eaves is a part of the working surface of the main body. The present invention can prevent bulk ore materials larger than a certain size from entering the orbit tooth sockets, and avoid the rapid wear and crushing of the walking meshing system by bulk ore materials from the source.

Description

Technical Field

[0001] The present invention relates to a protective device for massive ore on a walking track of a mining machine, which can prevent massive ore from entering the track tooth socket and being unable to be broken and discharged, thus preventing hindrance to walking and serious wear of the walking meshing system of the mining machine, and belongs to the technical field of underground mining machinery. Background Art

[0002] When a drum-type mining machine is used to mine high-hardness ore, the reaction force (especially impact) generated by cutting hard ore has a great impact on the walking meshing system of the mining machine. Moreover, the larger the size of the ore, the greater the impact on the walking meshing system of the mining machine. As Figure 16 shown, especially when high-hardness and large-size ore enters the track tooth socket and cannot be broken and discharged, the walking wheel teeth are too late to break the rock block, resulting in serious wear of the guiding sliding shoe of the mining machine (such as the bottom hook part of the guiding sliding shoe), and then serious wear and crushing of the walking meshing system, significantly shortening the service life, and significantly increasing the time required for troubleshooting, seriously affecting the economy of mining.

[0003] In response to the above problems, the industry has proposed to increase the thickness and length of the wear-resistant layer on the contact surface of the guiding sliding shoe of the mining machine, and at the same time take further surface hardening measures on the contact surface of the track. Although these measures have improved and increased the service life of the existing walking meshing system of the mining machine to a certain extent, the above problems have not been fundamentally solved, and still affect the walking speed of the mining machine, and are still an important factor restricting production capacity and economical mining. Summary of the Invention

[0004] The purpose of the present invention is to provide a track protection device for a mining machine, which can prevent massive ore larger than a certain size from entering the track tooth socket, avoid rapid wear of the walking meshing system caused by massive ore from the source, reduce the replacement times of the guiding sliding shoe and track parts, and can greatly shorten the troubleshooting time.

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

[0006] An orbital protection device for a mining machine, comprising a protective net and a rolling body. The protective net is inclined with the front lower and the rear higher and covers above the track of the conveyor. The rear edge of the protective net is fixedly connected to the conveyor. A pair of the rolling bodies are symmetrically installed on the left and right sides of the walking box of the mining machine. The ends of the rolling body close to and away from the walking box are respectively called the proximal end and the distal end. The rolling body is a bucket-shaped structural member, and the working surface of its main body is a smooth space curved surface concave in the middle. The height of the working surface of the main body gradually increases from the distal end to the proximal end. The part of the working surface of the main body close to the distal end is a smooth concave curved surface with the front lower and the rear higher, and the part of the working surface of the main body close to the proximal end is a smooth concave curved surface with the front higher and the rear lower. The bottom surface of the main body is located above the track of the conveyor. The upper part of the rolling body is provided with a top eaves overhanging from the proximal end to the distal end. The length of the top eaves in the left and right directions gradually increases from zero from the rear to the front, and is less than the total length of the working surface of the main body in the left and right directions. The lower surface of the top eaves is a part of the working surface of the main body, and the side surface of the overhanging end of the top eaves is a vertical surface.

[0007] The working surface of the main body includes a discharging working surface and a rolling working surface arranged in sequence from the distal end to the proximal end. The discharging working surface is a concave curved surface with the front lower and the rear higher, and the discharging working surface extends to the edge of the bottom surface of the main body at the distal end and is smoothly connected. The rolling working surface is successively divided into a bottom rolling surface, a middle rolling surface and an upper rolling surface from the distal end to the proximal end. Among them, both the middle rolling surface and the upper rolling surface are concave curved surfaces with the front higher and the rear lower, and the bottom rolling surface gradually transitions from the front lower and the rear higher to the front higher and the rear lower.

[0008] The rear part of the rolling body is provided with a guiding arm extending left and right. The front side surface of the guiding arm constitutes a part of the working surface of the main body. The top surface of the guiding arm is a smooth convex curved surface with the distal end lower and the proximal end higher, and the highest point of the top surface of the guiding arm is lower than the highest point of the protective net.

[0009] The guiding arm extends downward beyond the bottom surface of the main body, and the extended part is located behind the track of the conveyor.

[0010] There is a gap between the top eaves and the guiding arm in the height direction.

[0011] The vertical width of the surface at the rear part of the side surface of the overhanging end of the top eaves is preferably narrower at the front and wider at the rear.

[0012] The rolling body is preferably an integral structural member.

[0013] The rolling body is positioned and fixedly installed on the walking box through the outer vertical large plane at the proximal end and a plurality of connecting pins perpendicular to the vertical large plane and fastened by screws.

[0014] The track protection device for the mining machine also includes a connecting seat and a pressure plate. The connecting seat is fixed on the top of the front trough plate of the cable trough of the conveyor. The top surface of the connecting seat is an inclined surface with a low front and a high back. The rear edge of the single-piece protective net is placed on the top surfaces of several spaced-apart connecting seats. A pressure plate is correspondingly arranged for each connecting seat. The pressure plate and the connecting seat clamp the protective net in the middle and fix it by screws.

[0015] The track of the conveyor is composed of multiple track units arranged in a line, and multiple protective nets are arranged in sequence along the extension direction of the track of the conveyor. The length of a single protective net is greater than the length of the track unit, and the joints between two adjacent protective nets and the joints between two adjacent track units are staggered.

[0016] The beneficial effects of the present invention are:

[0017] The protective net can effectively prevent large and small mineral materials from entering the track tooth sockets, thus avoiding the wear and crushing problems caused by abnormal stress on the mining machine's walking meshing system due to the inability to discharge mineral materials from the tooth sockets. The improvement in the tooth sockets at the track seat is particularly obvious.

[0018] Due to the use of a rolling body, the mineral materials on the protective net covering the top of the track can be pushed into the conveyor trough. At the same time, the protective net can be rolled up and pushed to the rear side of the traveling box. After the traveling box passes, it will automatically flip back to the top of the track for protection, which not only achieves protection but also does not affect the movement of the mining machine.

[0019] The protective net cooperates with the rolling body to automatically complete the whole process of cleaning the mineral materials on the top of the net, rolling up the protective net and restoring the protective net. It does not require human intervention, has a simple structure and obvious effect.

[0020] The present invention can be directly added to the existing walking engagement system, thus solving the protection problem of the existing equipment, has good overall interchangeability, and can upgrade and transform a large number of existing structures in severe working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A side view of an embodiment of the present invention;

[0022] Figure 2 A front view of an embodiment of the present invention;

[0023] Figure 3 A top view of an embodiment of the present invention;

[0024] Figure 4 for Figures 1-3 A side view of the connection interface structure of the protective device of the traveling box;

[0025] Figure 5 for Figures 1-3Partial cross-sectional view of the protective device connection interface of the walking box in

[0026] Figure 6 Front view of an embodiment of the rolling body

[0027] Figure 7 Side view of the connection interface side of an embodiment of the rolling body

[0028] Figure 8 Side view of the rolling side of an embodiment of the rolling body

[0029] Figure 9 Top view of an embodiment of the rolling body

[0030] Figure 10 For Figure 6 A-A cross-sectional view of

[0031] Figure 11 For Figure 9 B-B cross-sectional view of

[0032] Figure 12 Installation schematic diagram of the protective net

[0033] Figure 13 Schematic diagram of the working state of the protective net

[0034] Figure 14 Schematic diagrams of multiple working states of the protective net

[0035] Figure 15 For Figure 13 C-C cross-sectional view of

[0036] Figure 16 Schematic diagram of the existing structure of the walking meshing system where bulk material accumulation at the track cannot be effectively discharged, affecting meshing.

[0037] Reference numerals:

[0038] 1. Rolling body; 11. Main body; 1111. Large vertical plane on the outer side of the proximal end of the main body; 1112. Pin hole; 1113. Screw hole; 1114. Rear side of the main body; 1115. Rear side guiding curve of the main body; 112. Guiding arm; 1121. Top surface of the guiding arm; 113. Discharge working surface; 1131. Distal curve; 114. Bottom rolling surface; 115. Middle rolling surface; 116. Upper rolling surface; 117. Top rolling surface;

[0039] 2. Protective net; 2'. Rolled protective net; 2". Unrolled protective net;

[0040] 31. Walking box housing; 311. Pin hole; 312. Screw hole; 32. Guide sliding shoe; 33. Walking wheel;

[0041] 4. Conveyor; 41. Cable trough; 411. Front trough plate; 42. Track;

[0042] 51. Connecting pin; 52. Screw;

[0043] 61. Connecting seat; 62. Pressure plate;

[0044] 91. Lumpy ore at the top of the protective net that is pushed and unloaded; 92. Ore that accumulates near the track in the existing walking meshing system and is difficult to discharge. Detailed implementation mode

[0045] The present invention discloses a track protection device for a mining machine (which can be simply referred to as a protection device). As Figures 1-15 shown, it includes a protective net 2 and a rolling body 1. The protective net covers the upper part of the track 42 of the conveyor 4 in a front-low and rear-high inclined manner. The rear edge of the protective net is fixedly connected to the conveyor, and the front edge of the protective net is a free edge. When there is no mining machine passing through, it naturally lies on the front top surface of the track (see the state of the protective net 2" in Figure 14 ). By setting the appropriate size of the protective net mesh holes, ore larger than a certain lump size can be prevented from falling into the track, thereby completely avoiding abnormal wear of the track and the walking system of the mining machine caused by the ore (such as Figure 16 the ore 92 shown) that cannot be effectively discharged from entering the tooth sockets of the track.

[0046] The guide sliding shoe 32 of the mining machine is hinged to the walking box housing 31 of the walking system and can cooperate with the track of the conveyor to slide relatively, realizing the support and sliding guidance of the rear part of the mining machine. The walking wheel 33 in the walking box of the mining machine rotates while meshing with the track teeth of the track, driving the mining machine to walk along the track. A pair of the rolling bodies 1 are symmetrically installed on the left and right sides of the housing of the walking box of the mining machine. Whether the mining machine slides to the left or right along the track, correspondingly, the rolling body on the left or right side of the walking box can turn the protective net on that side upward and backward until the protective net is turned to the rear of the walking box (see the state of the protective net 2' in Figure 14 ). When the walking box of the mining machine passes through the track corresponding to the area where the protective net is turned up, the turned-up protective net automatically restores, covering the corresponding area of the guide rail again. This not only prevents ore larger than a certain size from entering the tooth sockets of the track, avoiding abnormal force wear and crushing of the mining machine track and walking system, but also does not affect the normal walking of the mining machine, improving the meshing efficiency of the walking wheel, guide sliding shoe, and track.

[0047] For the convenience of expression, in this article, the ends of the rolling body close to and away from the walking box are respectively referred to as the proximal end and the distal end. The proximal end is provided with a detachable mounting interface structure for the fixed connection between the rolling body and the walking box. The rolling body is a bucket-shaped structural member. The working surface of the main body 11 of the rolling body is a smooth space curved surface with a concave middle part. The height of the working surface of the main body gradually increases from the distal end to the proximal end. The part of the working surface of the main body close to the distal end is a smooth concave curved surface with a lower front and a higher rear, and the part of the working surface of the main body close to the proximal end is a smooth concave curved surface with a higher front and a lower rear. The bottom surface of the main body is located above the track of the conveyor, so the rolling body can move left and right synchronously with the walking box without jamming. The upper part of the rolling body is provided with a top eaves that overhangs from the proximal end to the distal end. The length of the top eaves in the left-right direction gradually increases from zero from the rear to the front, and is less than the total left-right length of the working surface of the main body. The lower surface of the top eaves is a part of the working surface of the main body. The side surface of the overhanging end of the top eaves is a vertical surface, which is used to guide the protective net to first contact one end of the rolling body and gradually unfold upward and then turn up backward above this point when the rolling is almost finished. Since the length of the top eaves in the left-right direction is shorter and shorter towards the rear, that is, the side surface of the overhanging end of the top eaves is closer and closer to the proximal end towards the rear, the turned-up protective net is gradually rolled out to the rear of the walking box.

[0048] The working surface of the main body may further include a discharging working surface 113 and a rolling working surface arranged in sequence from the distal end to the proximal end. The discharging working surface is a concave curved surface with a lower front and a higher rear. The discharging working surface extends to the edge of the bottom surface of the main body at the distal end and is smoothly connected. The connection point can be seen in the distal curved surface 1131, which can be used for the initial stage guidance of the protective net. Especially after the protective net is used for a long time, the front part is likely to be deformed downward in a large area. At this time, the initial guiding effect of the distal curved surface 1131 gradually becomes prominent. The rolling working surface is divided into a bottom rolling surface 114, a middle rolling surface 115 and an upper rolling surface 116 in sequence from the distal end to the proximal end. Among them, both the middle rolling surface and the upper rolling surface are concave curved surfaces with a higher front and a lower rear, and the bottom rolling surface gradually transitions from a lower front and a higher rear to a higher front and a lower rear. When the mining machine slides left or right along the track, the protective net is first lifted by the guiding arm and the discharging working surface. The protective net has a surface shape with a lower front and a higher rear along with the discharging working surface, and the ore on the protective net can be poured from the front into the conveying trough of the conveyor (see Figure 14 the ore 91). As the mining machine continues to move forward, the protective net is continuously lifted upward and synchronously rolled by the rolling working surface. After pouring all the remaining ore, it is turned up backward above the whole, and finally rolled out to the rear of the walking box. The turning back of the protective net is restricted by the rear end surface of the walking box shell. After the walking box passes, the rolled-out protective net gradually returns to its original state and finally reclines and covers the track again, realizing that all ore with a particle size above a certain size is sent into the conveying trough and preventing these ores from entering the track tooth sockets.

[0049] At the rear of the rolling body, there is a guiding arm 112 extending left and right. The front side surface of the guiding arm constitutes a part of the working surface of the main body at the rear. The top surface 1121 of the guiding arm is a smooth convex curved surface with a lower distal end and a higher proximal end. In this embodiment, the top surface of the guiding arm is a smooth convex curved surface that gradually rises from zero from the distal end to the proximal end, and the highest point of the top surface of the guiding arm is lower than the highest point of the protective net. In the state where the protective net naturally covers the track, the distal end of the guiding arm first inserts under the rear part of the protective net and guides the protective net into the rolling body at the rear side. As the mining machine continues to move forward, the rear part of the protective net is gradually lifted by the top surface of the guiding arm, forming a raised state at the rear to unload the ore forward. On the one hand, the guiding arm guides the protective net into the rolling body, and on the other hand, it can also cause the lumps on the protective net to fall forward.

[0050] The guiding arm can extend downward beyond the bottom surface of the main body (the bottom surface is a horizontal plane in this embodiment), and the extended part is located behind the track of the conveyor, so as to guide the protective net starting from a position lower than the top surface of the track, and at the same time, it does not affect the movement of the rolling body along with the walking box. At the same time, the distal end of the guiding arm can also extend beyond the distal end of the main body, which can not only guide the protective net starting from a position lower than the top surface of the track, but also obtain a relatively gentle top surface of the guiding arm to ensure the smoothness of the guiding.

[0051] There is a gap between the top eaves and the guiding arm in the height direction, and an opening is formed above and at the rear between the two, through which the protective net rolls out backward and upward. The rear side surface 1114 of the main body above the guiding arm and the transition curved surface between the rear side surface of the main body and the top surface of the guiding arm, that is, the rear side guiding curved surface 1115 of the main body, play a certain guiding role in guiding the protective net to finally roll out behind the walking box.

[0052] The upper and lower widths of the surface at the rear part of the side surface of the overhanging end of the top eaves are narrower in the front and wider in the rear, which can be used as a guiding surface when the protective net rolls out backward and upward. The remaining surface of the side surface of the overhanging end of the top eaves can be a vertical plane extending in the front and rear, which is the main surface for guiding the protective net to turn up backward and upward, and can be called the top turning surface 117.

[0053] The rolling body is an integral special-shaped structural member.

[0054] The rolling body is preferably positioned by the vertical large plane 1111 on the outer side of the proximal end of the main body and a plurality of connecting pins 51 arranged perpendicular to the vertical large plane, and is fixedly installed on the left and right side walls of the walking box by screws 52. For this purpose, a plurality of pin holes 1112 and screw holes 1113 dispersed around each pin hole are provided on the vertical large plane on the outer side of the proximal end of the rolling body main body. The vertical large plane 1111, pin holes 1112 and screw holes 1113 on the outer side of the proximal end of the rolling body main body constitute a kind of detachable installation interface structure. Correspondingly, pin holes 311 and screw holes 312 are correspondingly arranged on the left and right side walls of the walking box (see Figure 4 ).

[0055] The track protection device for the mining machine also includes a connecting seat 61 and a pressure plate 62. The connecting seat is fixed to the top of the front trough plate 411 of the cable trough 41 of the conveyor. The top surface of the connecting seat is an inclined surface with a low front and a high back. The rear edge of the single-piece protective net is placed on the top surfaces of several spaced-apart connecting seats. A pressure plate is correspondingly arranged for each connecting seat. The pressure plate and the connecting seat clamp the protective net in the middle and fix it by screws.

[0056] In this embodiment, the bottom of the connection seat is provided with double-sided grooves opening downward, and the top surface is an inclined surface. When installing, the connection seat is sleeved on the upper edge of the front slot plate of the cable slot with its double-sided grooves and fixed with transverse screws. The upper part of the front slot plate is provided with a hole for installing the connection seat. The structure is simple, which not only ensures the reliable connection of the protection net, but also does not occupy more space and affect other components.

[0057] The track of the conveyor is composed of multiple track units arranged in a line, and multiple pieces of the protective net are arranged in sequence along the extension direction of the track of the conveyor. The length of a single protective net is greater than the length of the track unit, and the joints of two adjacent protective nets are staggered with the joints of two adjacent track units. In this embodiment, the length of a piece of protective net is twice the length of a track unit, and the joint of two adjacent protective nets is located in the middle of a track unit.

[0058] The invention can be installed and used on conveyor tracks and mining machines of existing structures, has good overall interchangeability, and can adapt to the upgrading and reconstruction of existing structures in a large number of severe working conditions.

[0059] In this article, the direction of the mining machine approaching the ore wall to be mined when working is called the front, and the direction away from the ore wall to be mined is called the rear.

Claims

1. An orbital protection device for a mining machine, characterized in that: It includes a protective net and a roll-up body, and also includes a connecting seat and a pressure plate. The protective net is low in front and high in the back and covers the top of the conveyor track. The rear edge of the protective net is fixedly connected to the conveyor. A pair of the roll-up bodies are symmetrically installed on the left and right sides of the walking box of the mining machine. The ends of the roll-up bodies close to and far away from the walking box are called the proximal end and the distal end respectively. The roll-up body is a bucket-shaped structural member, and the working surface of the main body is a smooth spatial curved surface with a concave middle part. The height of the working surface of the main body gradually increases from the distal end to the proximal end. The part of the working surface close to the distal end is a smooth concave surface with a low front and a high rear, and the part of the working surface of the main body close to the proximal end is a smooth concave surface with a high front and a low rear. The bottom surface of the main body is located above the track of the conveyor, and the upper part of the rolling body is provided with a top eaves that overhangs from the proximal end to the distal end. The left and right lengths of the top eaves gradually increase from zero from the back to the front, and are both smaller than the left and right total lengths of the working surface of the main body. The lower surface of the top eaves is a part of the working surface of the main body, and the side surface of the overhanging end of the top eaves is a vertical surface. The unloading working surface and the rolling working surface are sequentially arranged from the distal end to the proximal end, the unloading working surface is a concave surface with a low front and a high back, the unloading working surface extends at the distal end to smoothly connect with the bottom edge of the main body, the rolling working surface is sequentially divided into a bottom rolling surface, a middle rolling surface and an upper rolling surface from the distal end to the proximal end, wherein the middle rolling surface and the upper rolling surface are concave surfaces with a high front and a low back, the bottom rolling surface gradually transitions from a low front and a high back to a high front and a low back, the rear part of the rolling body is provided with a guide arm extending left and right, the front side of the guide arm The surface constitutes a part of the working surface of the main body, the top surface of the guide arm is a smooth convex surface with a low distal end and a high proximal end, the highest point of the top surface of the guide arm is lower than the highest point of the protective net, the guide arm extends downward beyond the bottom surface of the main body, the exceeding part is located behind the track of the conveyor, and a gap is maintained between the top eaves and the guide arm in the height direction, the connecting seat is fixed to the top of the front trough plate of the cable trough of the conveyor, and each connecting seat is correspondingly provided with a pressing plate, the pressing plate and the connecting seat clamp the protective net in the middle and fix it by screws.

2. The track protection device for a mining machine according to claim 1, characterized in that: The upper and lower widths of the rear surface of the side surface of the overhanging end of the top eaves are narrower at the front and wider at the back.

3. The track protection device for a mining machine according to claim 1 or 2, characterized in that: The roll-up body is an integrated structural component.

4. The track protection device for a mining machine according to claim 1 or 2, characterized in that: The rolling body is positioned and fastened with screws on the traveling box through the outer vertical large plane at the proximal end thereof and a plurality of connecting pins arranged perpendicular to the vertical large plane.

5. The track protection device for a mining machine according to claim 1 or 2, characterized in that: The top surface of the connecting seat is an inclined surface which is lower in the front and higher in the back, and the rear edge of the single piece of the protective net is placed on the top surfaces of several connecting seats arranged at intervals.

6. The track protection device for a mining machine according to claim 5, characterized in that: The track of the conveyor is composed of multiple track units arranged in a line, and multiple protective nets are arranged in sequence along the extension direction of the track of the conveyor. The length of a single protective net is greater than the length of the track unit, and the joints between two adjacent protective nets and the joints between two adjacent track units are staggered.

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