Thin coal seam coal continuous transportation turning mechanism and turning scraper conveyor thereof

Abstract

The application discloses a turning mechanism for continuous coal transportation in an extremely thin coal seam and a turning scraper conveyor thereof. The turning mechanism comprises a turning conveyor frame and a turning sliding support structure arranged on the turning conveyor frame. The turning conveyor frame comprises a C-shaped conveyor frame support body. The upper and lower sides of the conveyor frame support body are provided with turning middle grooves which are communicated with both ends of the conveyor frame support body. A plurality of conveyor scrapers are slidingly arranged in the turning middle grooves. The plurality of conveyor scrapers are connected through a conveyor transmission chain. The right-angle turning scraper conveyor of the application eliminates the power transmission device of the scraper conveyor head, realizes the continuous transportation of coal from the coal mining face to the mining area transportation roadway without the need of transloading, and is compact in vertical space arrangement, reduces the arrangement height of the original scraper conveyor head, solves the problem of insufficient arrangement space of the power transmission device, and is more suitable for the transportation of coal in a low and narrow roadway environment.

Description

Technical Field

[0001] This invention relates to the field of coal conveying machinery and equipment technology, specifically to a turning mechanism for continuous coal transportation in extremely thin coal seams and its turning scraper conveyor. Background Technology

[0002] Scraper conveyors are the main transportation equipment in fully mechanized coal mining faces. They also serve as the running track for coal mining machines and the fulcrum for the hydraulic supports. Their reliable, stable, and efficient operation in coal seam mining directly affects the safety and production capacity of modern coal mines. However, with the increasing depletion of exploitable medium-thick coal seam resources, underground mining of thin and extremely thin coal seams with a thickness of less than 1.3 meters has become an inevitable choice. Due to the limited space in thin and extremely thin coal seam mining, the layout of the scraper conveyor's transmission device has become increasingly important.

[0003] Traditional scraper conveyors require a connecting transfer conveyor to transport coal out of the longwall mining face. The scraper conveyor and transfer conveyor operate independently, with numerous and bulky power transmission devices, making equipment layout extremely difficult in confined spaces and hindering end support and roof management of the working face. Furthermore, the difference in unloading height between the scraper conveyor and transfer conveyor results in two main problems: firstly, high levels of coal dust at the unloading point, affecting worker health and safety; secondly, significant coal backflow occurs during unloading, impacting the scraper conveyor's transport efficiency and reliability. Summary of the Invention

[0004] The purpose of this invention is to provide a turning mechanism and a turning scraper conveyor for continuous coal transportation in extremely thin coal seams, which can realize continuous transportation from the coal mining face to the mining area transport roadway without transshipment.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A turning mechanism for continuous coal transportation in extremely thin coal seams includes a turning conveyor frame and a turning sliding support structure mounted on the turning conveyor frame;

[0007] The turning conveyor frame includes a C-shaped conveyor frame support body. Both the upper and lower sides of the conveyor frame support body have turning central grooves that connect the two ends. Multiple conveyor scrapers are slidably fitted in the turning central grooves, and the multiple conveyor scrapers are connected by a conveyor drive chain.

[0008] The turning center channel is composed of a central channel arc segment and straight central channel segments connecting the two ends of the arc segment. The arc range of the central channel arc segment is...

[0009] The conveyor frame support body has two turning sliding receiving slots that are respectively connected to the turning center slot. The turning sliding support structure includes multiple turning support cylindrical rollers that are rotatably connected in the turning sliding receiving slots and close to the turning center slot. The rotation axis of the turning support cylindrical rollers is arranged in the vertical direction.

[0010] Preferably, the conveyor scraper has a chain fixing through hole that runs through both sides, and each side of the conveyor scraper has a vertically extending chain link constraint groove.

[0011] The inner side of the chain fixing through hole has a lifting slide groove, and a lifting slider is provided in the lifting slide groove along the vertical direction. A chain link fastening block is fixedly connected to the lifting slider.

[0012] The top of the conveyor scraper has a vertically extending screw through hole that is connected to the lifting slide. The lifting slide has a threaded connection hole that extends coaxially with the screw through hole. A double-ended bolt is inserted into the screw through hole, and the lower end of the double-ended bolt is threaded into the threaded connection hole.

[0013] Explanation: By using chain link fastening blocks to fix and constrain the chain links of the conveyor drive chain in the chain fixing through holes, it is beneficial to the stability of the transportation process and to reduce the relative wear between the conveyor drive chain and the conveyor scraper.

[0014] Preferably, a roller connecting support platform is fixed at the bottom and top of the turning sliding receiving slot. The roller connecting support platforms extend concentrically along the turning center of the conveyor frame support body, and the turning support cylindrical roller is rotatably connected between the two roller connecting support platforms.

[0015] Note: Connecting the turning support cylindrical roller between two roller connection support platforms helps improve the running stability of the turning support cylindrical roller.

[0016] Preferably, the turning sliding receiving slot is provided with a roller constraint assembly plate, which is composed of two parallel roller constraint sub-plates. The two roller constraint sub-plates are fixedly connected by a fixed connecting plate. The side of the roller constraint sub-plate near the middle of the turning slot has multiple roller constraint C-shaped grooves. The rotating shafts of multiple turning support cylindrical rollers are fixedly constrained in each roller constraint C-shaped groove.

[0017] The roller-constrained plate is fixedly connected to the turning sliding receiving slot by multiple bolts.

[0018] Explanation: The roller constraint assembly plate is used to limit and constrain the cylindrical rollers of the turning support, so as to avoid collision and interference between two adjacent cylindrical rollers of the turning support. At the same time, the roller constraint assembly plate is easy to disassemble and assemble, and facilitates the inspection, maintenance and replacement of the cylindrical rollers of the turning support.

[0019] The roller constraint plate also acts as a sealant for the slotted area that accommodates turning slippage, and provides a certain degree of protection for the cylindrical rollers that support turning.

[0020] Preferably, a turning auxiliary guide plate is fixedly provided in the turning middle groove at both ends of the conveyor frame support. The turning auxiliary guide plate is arranged along the lateral tangent plane of the outermost turning support cylindrical roller, and the plane of the turning auxiliary guide plate is parallel to the conveying direction of the straight section of the middle groove.

[0021] Note: The turning auxiliary guide plate is set to make the contact between the conveyor scraper and the turning support cylindrical roller more stable, and to avoid impact loads affecting the service life of the turning support cylindrical roller.

[0022] Preferably, the turning support cylindrical roller comprises a roller support shaft and a roller rotating ring with an annular structure rotatably connected to the outside of the roller support shaft. The roller rotating ring is rotatably connected to the roller support shaft through a bearing, and a shaft retaining ring is snapped onto the roller support shaft at the bearing end.

[0023] The bearing is a sealed bearing to prevent foreign objects from entering;

[0024] Both ends of the roller support shaft are fixedly connected to two roller connecting support platforms, and the ends of the roller support shaft are fixedly constrained in the roller constraint C-shaped groove.

[0025] Preferably, the conveyor frame support has a docking groove and a docking protrusion at both ends for docking and connecting with the conveyor body of the linear conveying section;

[0026] Both the mating groove and the mating protrusion have dumbbell pin seats, which are used to fix and constrain the two dumbbell pin seats that are connected by the mating.

[0027] Note: The conveyor frame support body uses special dumbbell pin seats at both ends of the central trough. When it is installed underground, the dumbbell pins are used to connect to the central trough. It is highly practical, simple in structure, and reliable in quality.

[0028] Preferably, the conveyor frame support is provided with a gap synchronization mechanism. The gap synchronization mechanism includes a synchronization mechanism support frame that is fixedly connected to the outer side and the inner side of the turn of the conveyor frame support respectively. Each synchronization mechanism support frame is rotatably connected with multiple synchronization drive sprockets. The rotation shaft of the synchronization drive sprockets is arranged in the vertical direction. The multiple synchronization drive sprockets on a single synchronization mechanism support frame are connected to a gap synchronization chain for transmission.

[0029] Multiple synchronization constraint rods are connected to the lower side of the gap synchronization chain. The synchronization constraint rods are connected to the lower chain plate of the gap synchronization chain through fixed hinges.

[0030] The gap synchronization chain is equipped with a ring-shaped constraint rod deflection control ring. The constraint rod deflection control ring is arranged parallel to the running direction of the gap synchronization chain and connected end to end to form a ring structure. The side of the constraint rod deflection control ring has a ring of constraint rod deflection control groove. A deflection control connecting rod is fixed on the synchronous constraint rod, and a deflection control slider is fixed on the deflection control connecting rod. The deflection control slider is slidably constrained in the constraint rod deflection control groove.

[0031] The constraint rod deflection control ring is fixedly connected to the synchronous mechanism support frame through multiple fixed connecting rods;

[0032] A synchronous chain arc-shaped support is fixed on both the outer and inner sides of the turn of the conveyor frame support. The synchronous chain arc-shaped support on the outer side of the turn is pressed and constrained on the outer side of the gap synchronous chain, while the synchronous chain arc-shaped support on the inner side of the turn is pressed and constrained on the inner side of the gap synchronous chain.

[0033] Explanation: The gap synchronization mechanism of the present invention can constrain the direction of multiple conveyor scrapers during the turning process, so that the plane of the conveyor scraper is always perpendicular to the conveying direction, maintain the uniform force at both ends of the conveyor scraper, and avoid the conveyor scraper from deflecting due to uneven force and thus causing jamming.

[0034] Preferably, the gap synchronization chain is a short-pitch precision roller chain.

[0035] Preferably, the turning scraper conveyor based on the above-mentioned turning mechanism for continuous coal transportation in extremely thin coal seams includes a power head, a first scraper conveying section, a turning mechanism, and a second scraper conveying section that are sequentially connected to the power head. The turning mechanism is used to drive the first scraper conveying section and the second scraper conveying section.

[0036] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0037] 1. The present invention has a reasonable structural design. The right-angle turning scraper conveyor of the present invention eliminates the power transmission device of the scraper conveyor head, realizing continuous transportation of coal from the coal mining face to the mining area transport roadway without transshipment.

[0038] 2. The structure of this invention is compact in vertical space, which reduces the arrangement height at the head of the original scraper conveyor and solves the problem of insufficient space for the power transmission device. It is more suitable for coal transportation in low-ceilinged tunnel environments.

[0039] 3. The right-angle turning structure of the present invention eliminates the transfer process between two conveyors, which can avoid coal crushing caused by coal impact during unloading, reduce coal dust at the transition between the fully mechanized mining face and the transport roadway, suppress dust generation from the source, and effectively reduce the phenomenon of coal pull-back during coal transportation, thereby improving the reliability and transportation efficiency of the scraper conveyor.

[0040] 4. The gap synchronization mechanism of the present invention can constrain the direction of multiple conveyor scrapers during the turning process, so that the plane of the conveyor scraper is always perpendicular to the conveying direction, maintain the uniform force on both ends of the conveyor scraper, and avoid the conveyor scraper from deflecting due to uneven force, which may cause jamming. This is beneficial to ensuring the overall stability and reliability of the equipment operation. Attached Figure Description

[0041] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0042] Figure 2 yes Figure 1 Top view;

[0043] Figure 3 This is a schematic diagram of the conveyor scraper of the present invention;

[0044] Figure 4 This is a three-dimensional layout schematic diagram of the turning assist guide plate of the present invention;

[0045] Figure 5 This is a three-dimensional structural diagram of the turning sliding support structure of the present invention;

[0046] Figure 6 This is a three-dimensional structural diagram of the turning support cylindrical roller of the present invention;

[0047] Figure 7 This is an assembly diagram of the turning support cylindrical roller of the present invention;

[0048] Figure 8 This is a schematic diagram of the cross-sectional structure of the gap synchronization mechanism of the present invention;

[0049] Figure 9 This is a top view of the turning scraper conveyor of the present invention.

[0050] In the diagram, 10-turning conveyor frame, 11-conveyor frame support, 111-turning central trough, 1111-curved segment of central trough, 1112-straight segment of central trough, 12-conveyor scraper, 121-chain fixing through hole, 122-chain link constraint groove, 123-lifting slide, 124-lifting slider, 125-chain link fastening block, 126-screw through hole, 127-threaded connection hole, 128-double-ended bolt, 13-conveyor drive chain, 14-turning auxiliary guide plate, 151-butting groove, 152-butting protrusion, 153-dumbbell pin seat, 20-turning sliding support structure, 201-turning sliding receiving slot, 22-turning support cylindrical roller, 221-roller Sub-support shaft, 222-roller rotating ring, 223-bearing, 224-shaft retaining ring, 231-roller connecting support platform, 24-roller constraint combination plate, 241-roller constraint sub-plate, 242-fixed connecting plate, 243-roller constraint C-groove, 30-gap synchronization mechanism, 31-synchronization mechanism support frame, 32-synchronization drive sprocket, 33-gap synchronization chain, 34-synchronization constraint rod, 340-fixed hinge, 35-constraint rod deflection control ring, 351-constraint rod deflection control groove, 352-deflection control link, 353-deflection control slider, 36-synchronization chain arc support body, 90-power head, 91-first scraper conveyor section, 92-second scraper conveyor section. Detailed Implementation

[0051] The following is combined Figures 1-9 The present invention will be described in detail. For ease of description, the orientations mentioned below are defined as follows: The directions of up, down, left, right, front, and back mentioned below are consistent with the directions of up, down, left, right, front, and back in the projection relationship of the respective main view or structural schematic diagram.

[0052] Example 1:

[0053] Turning mechanisms for continuous coal transportation in extremely thin coal seams, such as Figure 1 As shown, it includes a turning conveyor frame 10 and a turning sliding support structure 20 disposed on the turning conveyor frame 10;

[0054] The turning conveyor frame 10 includes a C-shaped conveyor frame support 11. The upper and lower sides of the conveyor frame support 11 have turning center grooves 111 that connect the two ends. Multiple conveyor scrapers 12 are slidably fitted in the turning center grooves 111. The multiple conveyor scrapers 12 are connected by a conveyor drive chain 13.

[0055] The turning center channel 111 is composed of a central channel arc segment 1111 and a central channel straight segment 1112 connecting the two ends of the arc segment. The arc range of the central channel arc segment 1111 is...

[0056] The inner side of the conveyor frame support 11 has two turning sliding receiving slots 201 that are respectively connected to the turning center slot 111. The turning sliding support structure 20 includes a plurality of turning support cylindrical rollers 22 that are rotatably connected in the turning sliding receiving slots 201 and close to the side of the turning center slot 111. The rotation axis of the turning support cylindrical rollers 22 is arranged in the vertical direction.

[0057] like Figure 3 As shown, the conveyor scraper 12 has a chain fixing through hole 121 that runs through both sides, and each side of the conveyor scraper 12 has a vertically extending chain link constraint groove 122.

[0058] The inner side of the chain fixing through hole 121 has a lifting slide groove 123. A lifting slider 124 is slidably fitted in the vertical direction inside the lifting slide groove 123. A chain link fastening block 125 is fixedly connected to the lifting slider 124.

[0059] The top of the conveyor scraper 12 has a vertically extending screw through hole 126 that communicates with the lifting slide 123. The lifting slider 124 has a threaded connection hole 127 that extends coaxially with the screw through hole 126. A double-ended bolt 128 is inserted into the screw through hole 126, and the lower end of the double-ended bolt 128 is threaded into the threaded connection hole 127.

[0060] like Figure 4 As shown, a roller connecting support platform 231 is fixed at the bottom and top of the turning sliding receiving slot 201. The roller connecting support platform 231 extends concentrically along the turning center of the conveyor frame support 11. The turning support cylindrical roller 22 is rotatably connected between the two roller connecting support platforms 231.

[0061] like Figure 5 As shown, a roller constraint assembly plate 24 is provided in the turning sliding receiving slot 201. The roller constraint assembly plate 24 is composed of two parallel roller constraint sub-plates 241. The two roller constraint sub-plates 241 are fixedly connected by a fixed connecting plate 242. The roller constraint sub-plate 241 has multiple roller constraint C-shaped grooves 243 on the side near the turning middle slot 111. The rotating shafts of multiple turning support cylindrical rollers 22 are fixedly constrained in each roller constraint C-shaped groove 243.

[0062] The roller constraint plate 241 is fixedly connected to the turning sliding receiving slot 201 by multiple bolts.

[0063] like Figure 4 As shown, a turning auxiliary guide plate 14 is fixedly installed in the turning middle groove 111 at both ends of the conveyor frame support 11. The turning auxiliary guide plate 14 is arranged along the side tangent plane of the outermost turning support cylindrical roller 22, and the plane of the turning auxiliary guide plate 14 is parallel to the conveying direction of the straight section 1112 of the middle groove.

[0064] like Figure 6 , Figure 7 As shown, the turning support cylindrical roller 22 consists of a roller support shaft 221 and a roller rotating ring 222 with an annular structure rotatably connected to the outside of the roller support shaft 221. The roller rotating ring 222 is rotatably connected to the roller support shaft 221 through a bearing 223. A shaft retaining ring 224 is snapped onto the roller support shaft 221 at the end of the bearing 223.

[0065] Bearing 223 is a bearing with a sealing cap to prevent foreign objects from entering;

[0066] The two ends of the roller support shaft 221 are fixedly connected to two roller connecting support platforms 231 respectively, and the ends of the roller support shaft 221 are fixedly constrained in the roller constraint C-shaped groove 243.

[0067] like Figure 4 As shown, the conveyor frame support 11 has a docking groove 151 and a docking protrusion 152 at both ends, which are used to dock and connect with the conveyor body of the linear conveying section.

[0068] Both the mating groove 151 and the mating protrusion 152 have dumbbell pin seats 153, and the two dumbbell pin seats 153 connected by the mating are fixed and constrained by the dumbbell pins.

[0069] Example 2:

[0070] Based on Embodiment 1, the turning mechanism in this embodiment is provided with a gap synchronization mechanism 30 on the conveyor frame support 11, such as... Figure 2 , Figure 8 As shown, the gap synchronization mechanism 30 includes a synchronization mechanism support frame 31 that is fixedly connected to the outer side and the inner side of the turn of the conveyor frame support 11 respectively. Each synchronization mechanism support frame 31 is rotatably connected to multiple synchronization drive sprockets 32. The rotation axis of the synchronization drive sprockets 32 is arranged in the vertical direction. Multiple synchronization drive sprockets 32 on a single synchronization mechanism support frame 31 are connected to a gap synchronization chain 33 for transmission.

[0071] Multiple synchronous constraint rods 34 are connected to the lower side of the gap synchronous chain 33. The synchronous constraint rods 34 are connected to the lower chain plate of the gap synchronous chain 33 through a fixed hinge 340.

[0072] The gap synchronization chain 33 is provided with a ring-shaped constraint rod deflection control ring 35. The constraint rod deflection control ring 35 is arranged parallel to the running direction of the gap synchronization chain 33 and connected end to end to form a ring structure. The side of the constraint rod deflection control ring 35 has a ring of constraint rod deflection control groove 351. A deflection control connecting rod 352 is fixed on the synchronization constraint rod 34. A deflection control slider 353 is fixed on the deflection control connecting rod 352. The deflection control slider 353 is slidably constrained in the constraint rod deflection control groove 351.

[0073] The constraint rod deflection control ring 35 is fixedly connected to the synchronous mechanism support frame 31 through multiple fixed connecting rods;

[0074] A synchronous chain arc-shaped support 36 is fixed on both the outer and inner sides of the turn of the conveyor frame support 11. The synchronous chain arc-shaped support 36 on the outer side of the turn is pressed and constrained on the outer side of the gap synchronous chain 33, while the synchronous chain arc-shaped support 36 on the inner side of the turn is pressed and constrained on the inner side of the gap synchronous chain 33.

[0075] The gap synchronization chain 33 is a short-pitch precision roller chain.

[0076] Example 3:

[0077] The difference between this embodiment and Embodiment 1 is that the arc range of the central groove arc segment 1111 is...

[0078] Example 4:

[0079] The difference between this embodiment and Embodiment 1 is that the arc range of the central groove arc segment 1111 is...

[0080] Example 5:

[0081] The turning scraper conveyor based on the turning mechanism for continuous coal transportation in extremely thin coal seams in Embodiment 2 above, such as... Figure 9 As shown, it includes a power head 90, a first scraper conveying section 91, a turning mechanism, and a second scraper conveying section 92 that are sequentially connected to the power head 90. The turning mechanism is used to drive the first scraper conveying section 91 and the second scraper conveying section 92.

[0082] In practical application, the two straight sections 1112 of the middle trough are further divided into an entry straight section and an exit straight section. The conveyor drive chain 13 is driven by the power head 90 to drag and move. When the conveyor drive chain 13 drags and drives multiple conveyor scrapers 12 through the turning middle trough 111, each conveyor scraper 12 enters from the entry straight section of the straight section 1112 of the middle trough in sequence, continues to pass through the arc section 1111 of the middle trough, and is dragged out from the exit straight section of the straight section 1112 of the middle trough.

[0083] The turning trough 111 is loaded with coal, and the conveyor drive chain 13 drags and drives multiple conveyor scrapers 12 to drive and transport the coal loaded in the turning trough 111.

[0084] When each conveyor scraper 12 passes through the central trough arc section 1111, the end of the conveyor scraper 12 located on the inside of the turn first slides past the turning auxiliary guide plate 14 in the straight section entering the turn. Then, the end of the conveyor scraper 12 located on the inside of the turn rolls and is supported by the turning support cylindrical roller 22. As the conveyor scraper 12 continues to move, the roller rotating ring 222 of the turning support cylindrical roller 22 supports the conveyor scraper 12 to roll. The conveyor scraper 12 passes through each turning support cylindrical roller 22 in sequence and slides past the turning auxiliary guide plate 14 in the straight section exiting the turn. Finally, the conveyor scraper 12 is dragged out from the straight section exiting the turn, completing the entire turning action.

[0085] During the turning process of the conveyor scraper 12 in the middle trough arc segment 1111, the synchronous drive sprocket 32 ​​is driven to rotate by the servo motor. The synchronous drive sprocket 32 ​​drives the gap synchronous chain 33 to move. When the synchronous constraint rod 34 on the gap synchronous chain 33 passes the middle trough arc segment 1111 and approaches the end of the straight section entering the bend, the lower end of the synchronous constraint rod 34 moves downward and deflects under the constraint control of the constraint rod deflection control ring 35, so that the lower end of the synchronous constraint rod 34 presses against the side of the conveyor scraper 12. Specifically, under the constraint of the constraint rod deflection control groove 351, the movement path of the deflection control slider 353 is controlled. The deflection control slider 353 then controls the synchronous constraint rod 34 to deflect around the fixed hinge 340 through the deflection control link 352.

[0086] When the synchronous constraint rod 34 on the gap synchronous chain 33 passes through the middle groove arc segment 1111 and approaches one end of the straight section of the bend, under the constraint control of the constraint rod deflection control ring 35, the lower end of the synchronous constraint rod 34 moves upward and deflects, causing the lower end of the synchronous constraint rod 34 to disengage from the side of the conveyor scraper 12. The synchronous constraint rod 34 moves upward and deflects around the edge of the conveyor frame support 11 to avoid collision with the conveyor frame support 11. Driven by the gap synchronous chain 33, the synchronous constraint rod 34 periodically limits and constrains the conveyor scraper 12 passing through the middle groove arc segment 1111, so that the orientation of the plane where the conveyor scraper 12 is located is always perpendicular to the conveying direction.

Claims

1. A turning mechanism for continuous coal transportation in extremely thin coal seams, characterized in that, The turning mechanism includes a turning conveyor frame (10) and a turning sliding support structure (20) disposed on the turning conveyor frame (10). The turning conveyor frame (10) includes a C-shaped conveyor frame support (11). The upper and lower sides of the conveyor frame support (11) have turning center grooves (111) that connect the two ends of the frame. Multiple conveyor scrapers (12) are slidably fitted in the turning center grooves (111). The multiple conveyor scrapers (12) are connected by a conveyor drive chain (13). The turning center groove (111) is composed of a central groove arc segment (1111) and a central groove straight segment (1112) connecting the two ends of the arc segment. The arc range of the central groove arc segment (1111) is... ; The inner side of the conveyor frame support (11) has two turning sliding receiving slots (201) that are respectively connected to the turning center slot (111). The turning sliding support structure (20) includes a plurality of turning support cylindrical rollers (22) that are rotatably connected in the turning sliding receiving slots (201) and close to the turning center slot (111). The rotation axis of the turning support cylindrical rollers (22) is arranged in the vertical direction. The turning sliding receiving slot (201) is provided with a roller constraint assembly plate (24), which is composed of two parallel roller constraint sub-plates (241). The two roller constraint sub-plates (241) are fixedly connected by a fixed connecting plate (242). The roller constraint sub-plate (241) has multiple roller constraint C-shaped grooves (243) on the side near the turning center slot (111). The rotating shafts of multiple turning support cylindrical rollers (22) are fixedly constrained in each of the roller constraint C-shaped grooves (243). The roller constraint plate (241) is fixedly connected to the turning sliding receiving slot (201) by multiple bolts; The conveyor frame support (11) is provided with a gap synchronization mechanism (30). The gap synchronization mechanism (30) includes a synchronization mechanism support frame (31) fixedly connected to the outside and inside of the turn of the conveyor frame support (11). Each synchronization mechanism support frame (31) is rotatably connected with multiple synchronization drive sprockets (32). The rotation axis of the synchronization drive sprockets (32) is arranged in the vertical direction. The multiple synchronization drive sprockets (32) on a single synchronization mechanism support frame (31) are connected to a gap synchronization chain (33) for transmission. The gap synchronization chain (33) is connected to a number of synchronization constraint rods (34) on its lower side. The synchronization constraint rods (34) are connected to the lower chain plate of the gap synchronization chain (33) through a fixed hinge (340). The gap synchronization chain (33) is provided with a ring-shaped constraint rod deflection control ring (35). The constraint rod deflection control ring (35) is arranged along the running direction parallel to the gap synchronization chain (33) and connected end to end to form a ring structure. The side of the constraint rod deflection control ring (35) has a ring of constraint rod deflection control groove (351). A deflection control connecting rod (352) is fixed on the synchronization constraint rod (34). A deflection control slider (353) is fixed on the deflection control connecting rod (352). The deflection control slider (353) is slidably constrained in the constraint rod deflection control groove (351). The constraint rod deflection control ring (35) is fixedly connected to the synchronous mechanism support frame (31) through multiple fixed connecting rods; A synchronous chain arc support (36) is fixed on the outer side and the inner side of the turn of the conveyor frame support (11). The synchronous chain arc support (36) on the outer side of the turn is supported and constrained on the outer side of the gap synchronous chain (33), and the synchronous chain arc support (36) on the inner side of the turn is supported and constrained on the inner side of the gap synchronous chain (33).

2. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 1, characterized in that: The conveyor scraper (12) has a chain fixing through hole (121) that runs through both sides, and each side of the conveyor scraper (12) has a vertically extending chain link constraint groove (122). The inner side of the chain fixing through hole (121) has a lifting groove (123), and a lifting slider (124) is provided in the lifting groove (123) along the vertical direction. A chain link fastening block (125) is fixedly connected to the lifting slider (124). The top of the conveyor scraper (12) has a vertically extending screw through hole (126) that communicates with the lifting slide (123). The lifting slider (124) has a threaded connection hole (127) that extends coaxially with the screw through hole (126). A double-ended bolt (128) is inserted into the screw through hole (126), and the lower end of the double-ended bolt (128) is threaded into the threaded connection hole (127).

3. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 1, characterized in that: A roller connecting support platform (231) is fixed at the bottom and top of the turning sliding receiving slot (201). The roller connecting support platform (231) extends concentrically along the turning center of the conveyor frame support (11). The turning support cylindrical roller (22) is rotatably connected between the two roller connecting support platforms (231).

4. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 1, characterized in that: A turning auxiliary guide plate (14) is fixedly installed in the turning middle groove (111) at both ends of the conveyor frame support (11). The turning auxiliary guide plate (14) is arranged along the side tangent plane of the outermost turning support cylindrical roller (22), and the plane of the turning auxiliary guide plate (14) is parallel to the conveying direction of the straight section (1112) of the middle groove.

5. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 3, characterized in that: The turning support cylindrical roller (22) comprises a roller support shaft (221) and a roller rotating ring (222) with an annular structure rotatably connected to the outside of the roller support shaft (221). The roller rotating ring (222) is rotatably connected to the roller support shaft (221) through a bearing (223). A shaft retaining ring (224) is snapped onto the roller support shaft (221) at the end of the bearing (223). The two ends of the roller support shaft (221) are fixedly connected to the two roller connecting support platforms (231) respectively, and the end of the roller support shaft (221) is fixedly constrained in the roller constraint C-shaped groove (243).

6. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 1, characterized in that: The conveyor frame support (11) has a docking groove (151) and a docking protrusion (152) at both ends, which are used to dock with the conveyor body of the linear conveying section. Both the docking groove (151) and the docking protrusion (152) have dumbbell pin seats (153), and the dumbbell pins are used to fix and constrain the two dumbbell pin seats (153) that are docked together.

7. The turning mechanism for continuous coal transportation in extremely thin coal seams according to claim 1, characterized in that: The gap synchronization chain (33) is a short-pitch precision roller chain.

8. A turning scraper conveyor based on the turning mechanism for continuous coal transportation in extremely thin coal seams as described in claim 1, characterized in that: It includes a power head (90), a first scraper conveying section (91), a turning mechanism and a second scraper conveying section (92) that are sequentially connected to the power head (90), and the turning mechanism is used to drive the first scraper conveying section (91) and the second scraper conveying section (92).

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