Turning mechanism suitable for ultra-thin coal seam scraper conveyor

Abstract

The utility model discloses a turning mechanism suitable for an ultra-thin coal seam scraper conveyor. The turning mechanism comprises a turning conveying rack and a turning supporting structure arranged on the turning conveying rack. The turning conveying rack comprises a C-shaped conveying rack supporting body and a plurality of conveyor scrapers which are located in the conveying rack supporting body and fixedly connected through a conveyor transmission chain. The turning supporting structure comprises two turning supporting wheels which are rotationally connected to the inner side of the conveying rack supporting body and are coaxially arranged, and a plurality of pairs of scraper plate restraining blocks are fixed to the side faces of the turning supporting wheels; the turning supporting wheel is connected with the conveying rack supporting body through a reverse synchronizing mechanism; the turning mechanism can replace an existing transshipment conveying scheme, the conveying section of the scraper conveyor is divided into two sections, then the two sections of conveying sections are connected through the turning mechanism, a power transmission device of a machine head of the scraper conveyor in the transshipment conveying process is omitted, and continuous transportation of coal from a coal face to a mining area transportation roadway without transshipment is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal conveying machinery and equipment, in particular to a turning mechanism applicable to a scraper conveyor in an extremely thin coal seam. Background Technique

[0002] The scraper conveyor is the main transportation equipment in the fully mechanized coal mining face underground. At the same time, it is also the running track of the shearer during operation and the pushing fulcrum of the hydraulic support. Whether it can operate reliably, stably and efficiently in coal seam mining directly affects the safety and production capacity of modern coal mines. At present, most of the coal seams mined in China belong to medium-thick coal seams, with a large mining space, and not much attention has been paid to the layout problem of the transmission device of the scraper conveyor. However, with the increasing depletion of the exploitable medium-thick coal seam resources, the mining of thin and extremely thin coal seams with a thickness of less than 1.3 meters underground has become an inevitable choice. Due to the narrow mining space of thin and extremely thin coal seams, the layout problem of the transmission device of the scraper conveyor has become increasingly prominent.

[0003] The traditional scraper conveyor needs to be lapped with a transfer machine to transport coal out of the fully mechanized coal mining face. The scraper conveyor and the scraper transfer machine operate independently. There are many power transmission devices and they are relatively large in volume, resulting in great difficulty in arranging equipment in a narrow space, and it is not conducive to the end support and roof management of the working face. In addition, affected by the coal unloading height difference between the scraper conveyor and the transfer machine, on the one hand, the amount of coal dust is large at the coal unloading point, affecting the health and safety of workers; on the other hand, the phenomenon of pulling back coal is serious during the actual coal unloading process, affecting the coal transportation efficiency and reliability of the scraper conveyor. Content of the Utility Model

[0004] The purpose of the utility model is to provide a turning mechanism applicable to a scraper conveyor in an extremely thin coal seam, which can realize continuous transportation from the coal mining face to the mining area transportation roadway without transfer.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A turning mechanism applicable to a scraper conveyor in an extremely thin coal seam, including a turning conveyor frame and a turning support structure arranged on the turning conveyor frame;

[0007] The turning conveyor frame includes a C-shaped conveyor frame support body and multiple conveyor scrapers located inside the conveyor frame support body and fixedly connected by a conveyor drive chain;

[0008] The turning support structure includes two turning support wheels rotatably connected to the inner side of the conveyor frame support body and arranged coaxially. Multiple pairs of scraper restraint blocks are fixed on the side surfaces of the turning support wheels;

[0009] The turning support wheels are connected to the conveyor frame support body through a reverse synchronization mechanism.

[0010] Preferably, both upper and lower sides of the conveyor frame support body have a conveying middle groove connecting both ends, and the conveyor scraper slides in the conveying middle groove. The conveying middle groove is composed of a middle groove arc segment and a middle groove straight segment connected to both ends of the arc segment.

[0011] Preferably, the arc range of the middle slot arc segment is

[0012] Preferably, the inner side of the conveyor frame support body is provided with two turning support accommodating slots respectively connected with the conveying middle slot, and the edges of the two turning support wheels respectively extend into the two turning support accommodating slots.

[0013] Note: The entire turning mechanism is suitable for use in various turning angles.

[0014] Preferably, the reverse synchronization mechanism includes a reverse synchronization support ring arranged between the two turning support wheels, the reverse synchronization support ring is coaxially arranged with the turning support wheel, the reverse synchronization support ring is fixedly connected to the conveying frame support body through a fixed connecting plate, a plurality of reverse synchronization bevel gears are rotatably connected to the inner side of the reverse synchronization support ring, the axis of the reverse synchronization bevel gear is arranged along the radial direction of the reverse synchronization support ring, a synchronous matching bevel gear is fixed on each side of the two turning support wheels close to each other, and the reverse synchronization bevel gear is meshed with the two synchronous matching bevel gears at the same time.

[0015] Description: The reverse synchronization mechanism can accurately keep the conveyor scrapers on the entire conveyor drive chain running smoothly in the conveying section and return section.

[0016] Preferably, a scraper turning synchronization mechanism is provided on the conveyor frame support body, and the scraper turning synchronization mechanism includes a turning synchronization driving disk rotatably connected at the straight section of the middle groove and multiple turning synchronization driven disks rotatably connected at the arc section of the middle groove, and the turning synchronization driving disk and the turning synchronization driven disk are connected by a universal transmission shaft.

[0017] Description: The scraper turning synchronization mechanism provides auxiliary limit constraints on the turning process of multiple conveyor scrapers, keeping the force on both ends of the conveyor scrapers uniform, and avoiding the conveyor scrapers from deflecting due to uneven force and causing jams.

[0018] Compared with the prior art, the beneficial effects of the present invention are embodied in the following aspects:

[0019] 1. The utility model has a reasonable structural design. The turning mechanism of the utility model can replace the existing transfer and transportation scheme, divide the conveying section of the scraper conveyor into two, and then use the turning mechanism to connect the two conveying sections, eliminating the power transmission device of the scraper conveyor head during transfer and transportation, and realizing the continuous transportation of coal from the coal mining face to the mining area transportation lane without transfer;

[0020] 2. The turning mechanism of the present utility model is compactly arranged in the vertical space, reducing the arrangement height at the head of the original scraper conveyor, solving the problem of insufficient arrangement space for the power transmission device, and being more suitable for coal transportation in low roadway environments;

[0021] 3. The turning mechanism of the present utility model uses turning support wheels to support the conveyor scraper for turning, with strong load-bearing capacity and relatively stable operation during turning, avoiding the problem of excessive running vibration;

[0022] 4. The turning mechanism of the present utility model uses a scraper turning synchronization mechanism to assist in limiting and constraining the turning process of multiple conveyor scrapers, keeping the forces on both ends of the conveyor scraper uniform, and avoiding the situation of the conveyor scraper deflecting due to uneven forces and causing machine jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional structure schematic diagram of the present utility model;

[0024] Figure 2 is Figure 1 the top view of

[0025] Figure 3 is a structure schematic diagram of the reverse synchronization mechanism of the present utility model;

[0026] Figure 4 is a structure schematic diagram of the scraper turning synchronization mechanism of the present utility model.

[0027] In the figure, 10 - turning conveyor frame, 11 - conveyor frame support body, 111 - conveying middle trough, 1111 - middle trough arc segment, 1112 - middle trough straight segment, 12 - conveyor scraper, 13 - conveyor drive chain, 20 - turning support structure, 201 - turning support accommodation slot, 21 - turning support wheel, 211 - scraper restraint block, 31 - reverse synchronization mechanism, 311 - reverse synchronization support ring, 312 - reverse synchronization bevel gear, 313 - synchronous mating bevel gear, 32 - scraper turning synchronization mechanism, 321 - turning synchronization drive shaft, 322 - turning synchronization drive disk, 323 - turning synchronization drive rod, 324 - turning synchronization driven shaft, 325 - turning synchronization driven disk, 326 - turning synchronization driven rod, 327 - turning synchronization bevel gear, 328 - turning driven bevel gear, 329 - synchronous drive bevel gear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The following Figures 1 - 4 is used to describe the present utility model in detail. For the convenience of narration, the following orientation regulations are made: the up, down, left, right, front, and back directions mentioned below are consistent with the up, down, left, right, front, and back directions of the projection relationship of each main view or structure schematic diagram itself.

[0029] Example 1:

[0030] A turning mechanism applicable to a scraper conveyor for extremely thin coal seams, as Figure 1 shown, includes a turning conveyor frame 10 and a turning support structure 20 arranged on the turning conveyor frame 10;

[0031] The turning conveyor frame 10 includes a C-shaped conveyor frame support body 11 and multiple conveyor scrapers 12 located inside the conveyor frame support body 11 and fixedly connected by a conveyor drive chain 13;

[0032] On the inner side of the conveyor frame support body 11, there are two turning support accommodation slots 201 respectively communicating with the conveyor middle trough 111. The turning support structure 20 includes two turning support wheels 21 rotatably connected to the inner side of the conveyor frame support body 11 and coaxially arranged. The edges of the two turning support wheels 21 respectively extend into the two turning support accommodation slots 201;

[0033] On the side of the turning support wheel 21, multiple pairs of scraper restraint blocks 211 are fixed.

[0034] Both the upper and lower sides of the conveyor frame support body 11 have conveyor middle troughs 111 communicating with both ends thereof. The conveyor scraper 12 is slidably fitted in the conveyor middle trough 111. The conveyor middle trough 111 is composed of a middle trough arc segment 1111 and middle trough straight segments 1112 connected to both ends of the arc segment. The radian range of the middle trough arc segment 1111 is ;

[0035] As Figure 3 shown, the turning support wheel 21 is connected to the conveyor frame support body 11 through a reverse synchronization mechanism 31. The reverse synchronization mechanism 31 includes a reverse synchronization support ring 311 arranged between the two turning support wheels 21. The reverse synchronization support ring 311 is coaxially arranged with the turning support wheel 21. The reverse synchronization support ring 311 is fixedly connected to the conveyor frame support body 11 through a fixed connection plate. A plurality of reverse synchronization bevel gears 312 are rotatably connected to the inner side of the reverse synchronization support ring 311. The axes of the reverse synchronization bevel gears 312 are arranged along the radial direction of the reverse synchronization support ring 311. A synchronization cooperation bevel gear 313 is fixed to each of the two sides of the two turning support wheels 21 close to each other. The reverse synchronization bevel gear 312 is meshed and connected to the two synchronization cooperation bevel gears 313 at the same time.

[0036] Example 2:

[0037] Based on Example 1, in this example, as Figure 2 、 Figure 4As shown, a scraper turning synchronization mechanism 32 is provided on the conveyor frame support body 11, and the scraper turning synchronization mechanism 32 includes a turning synchronization drive shaft 321 which is rotatably connected to the top of the conveyor frame support body 11 and located at the middle groove straight section 1112, and the turning synchronization drive shaft 321 is perpendicular to the conveying direction of the middle groove straight section 1112, and a turning synchronization drive disk 322 is fixed on the turning synchronization drive shaft 321, and a plurality of turning synchronization drive rods 323 are fixed on the turning synchronization drive disk 322;

[0038] A plurality of turning synchronous driven shafts 324 are rotatably connected to the top of the conveyor frame support body 11 and located outside the middle groove arc segment 1111. The turning synchronous driven shafts 324 are arranged radially along the middle groove arc segment 1111. A turning synchronous driven disk 325 is fixed to one end of the turning synchronous driven shaft 324 close to the middle groove arc segment 1111. A plurality of turning synchronous driven rods 326 are fixed to the turning synchronous driven disk 325.

[0039] A turning synchronous bevel gear 327 is fixed to the outer end of the turning synchronous drive shaft 321, and a turning driven bevel gear 328 is fixed to the outer end of the turning synchronous driven shaft 324. The turning synchronous bevel gear 327 and each turning driven bevel gear 328 are meshed and connected with a synchronous driving bevel gear 329, and multiple synchronous driving bevel gears 329 are connected for transmission through a transmission shaft with a universal joint.

[0040] Embodiment 3:

[0041] The difference from Example 1 is that the curvature of the middle slot arc segment 1111 is

[0042] Embodiment 4:

[0043] The difference from Example 1 is that the curvature of the middle slot arc segment 1111 is

[0044] In the actual application process of the utility model, the conveying section of the scraper conveyor is divided into two, and the entire turning mechanism is used to connect the two conveying sections to form a scraper conveyor capable of turning and conveying;

[0045] The two middle slot straight sections 1112 are further divided into a straight section for entering the bend and a straight section for exiting the bend. The conveyor drive chain 13 is driven by the conveyor head to drag and move. When the conveyor drive chain 13 drags and drives multiple conveyor scrapers 12 to pass through the middle slot 111, each conveyor scraper 12 enters from the straight section for entering the bend of the middle slot straight section 1112 in turn, continues to pass through the middle slot arc section 1111, and then is dragged and moved out from the straight section for exiting the bend of the middle slot straight section 1112.

[0046] The middle groove 111 of the turning part is loaded with coal, and the conveyor drive chain 13 drags and drives the plurality of conveyor scrapers 12 to drive and convey the coal loaded in the middle groove 111 of the turning part;

[0047] When each conveyor scraper 12 passes through the middle groove arc segment 1111, the end of the conveyor scraper 12 on the inner side of the turn contacts the turning support wheel 21, and one end of the conveyor scraper 12 is stuck between a pair of scraper constraint blocks 211. As the conveyor scraper 12 continues to move, the turning support wheel 21 rotates synchronously with it. Under the support and guidance of the turning support wheel 21, the conveyor scraper 12 is driven to pass through the middle groove arc segment 1111 and then enter the straight section out of the bend. Finally, the conveyor scraper 12 is dragged out from the straight section out of the bend to complete the entire turning action.

[0048] During the turning process of the conveyor scraper 12 in the middle groove arc segment 1111, the conveyor scraper 12 in the middle groove straight segment 1112 moves the turning synchronous drive rod 323 and drives the turning synchronous drive disk 322 to rotate, and the turning synchronous drive disk 322 drives the turning synchronous drive shaft 321 to rotate. Through the transmission connection between the turning synchronous bevel gear 327, the synchronous drive bevel gear 329 and the turning driven bevel gear 328, the turning synchronous drive shaft 321 drives each turning synchronous driven shaft 324 to rotate synchronously with it, and the turning synchronous driven shaft 324 drives the turning synchronous driven disk 325 together with the turning synchronous driven rod 326 to rotate. The turning synchronous driven rod 326 is used to move the conveyor scraper 12 in the middle groove arc segment 1111 to assist the conveyor scraper 12 to complete the turning action.

Claims

1. A turning mechanism suitable for a scraper conveyor for an extremely thin coal seam, characterized in that: It comprises a turning conveyor frame (10) and a turning support structure (20) arranged on the turning conveyor frame (10); The turning conveyor frame (10) comprises a C-shaped conveyor frame support body (11) and a plurality of conveyor scrapers (12) located in the conveyor frame support body (11) and fixedly connected via a conveyor transmission chain (13); The turning support structure (20) comprises two turning support wheels (21) which are rotatably connected to the inner side of the conveyor frame support body (11) and are coaxially arranged, and a plurality of pairs of scraper restraining blocks (211) are fixed to the side of the turning support wheel (21); The turning support wheel (21) is connected to the conveyor frame support body (11) via a reverse synchronization mechanism (31).

2. The turning mechanism for a scraper conveyor for an extremely thin coal seam according to claim 1, characterized in that: The conveyor frame support body (11) has a conveying middle groove (111) connecting the two ends thereof on both upper and lower sides, and the conveyor scraper (12) is slidably fitted in the conveying middle groove (111). The conveying middle groove (111) is composed of a middle groove arc segment (1111) and a middle groove straight segment (1112) connected to the two ends of the arc segment.

3. The turning mechanism for a scraper conveyor for an extremely thin coal seam according to claim 2 is characterized in that: The arc range of the middle groove arc segment (1111) is 4. The turning mechanism for a scraper conveyor for an extremely thin coal seam according to claim 2 is characterized in that: The inner side of the conveying frame support body (11) has two turning support accommodating slots (201) respectively connected to the conveying middle slot (111), and the edges of the two turning support wheels (21) respectively extend into the two turning support accommodating slots (201).

5. The turning mechanism for a scraper conveyor for an extremely thin coal seam according to claim 1 is characterized in that: The reverse synchronization mechanism (31) comprises a reverse synchronization support ring (311) arranged between the two turning support wheels (21); the reverse synchronization support ring (311) is coaxially arranged with the turning support wheel (21); the reverse synchronization support ring (311) is fixedly connected to the conveying frame support body (11) via a fixed connecting plate; a plurality of reverse synchronization bevel gears (312) are rotatably connected inside the reverse synchronization support ring (311); the axes of the reverse synchronization bevel gears (312) are arranged radially along the reverse synchronization support ring (311); a synchronization matching bevel gear (313) is fixed to each side of the two turning support wheels (21) close to each other; and the reverse synchronization bevel gear (312) is simultaneously meshed and connected with the two synchronization matching bevel gears (313).

6. The turning mechanism for a scraper conveyor for an extremely thin coal seam according to claim 2, characterized in that: A scraper turning synchronization mechanism (32) is provided on the conveyor frame support body (11), and the scraper turning synchronization mechanism (32) comprises a turning synchronization driving disk (322) rotatably connected to the middle groove straight line segment (1112) and a plurality of turning synchronization driven disks (325) rotatably connected to the middle groove arc segment (1111), and the turning synchronization driving disk (322) and the turning synchronization driven disk (325) are connected in transmission via a universal transmission shaft.

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