Telescopic belt conveyor for underground coal mine roadway

Abstract

The invention relates to the technical field of conveyors, in particular to a telescopic belt conveyor for an underground coal mine roadway. Comprising a main belt conveyor, an extension belt conveyor, a telescopic mechanism and a turnover mechanism. The extension belt conveyor is located on the lower side of the main belt conveyor, and the telescopic mechanism can drive the extension belt conveyor to stretch out or retract in the belt conveying direction compared with the main belt conveyor. When the extending belt conveyor is in a complete extending state compared with the main belt conveyor, the overturning mechanism can drive the extending belt conveyor to overturn around the feeding end of the extending belt conveyor so as to adjust the discharging angle of the extending belt conveyor. The conveyor is convenient to use, easy to adjust, capable of meeting different conveying requirements and wider in application range.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of conveyors, in particular to a retractable belt conveyor for underground coal mine tunnels. BACKGROUND

[0002] Underground coal mine tunnels refer to the passageways excavated in coal seams or rock strata during underground coal mining for various production activities such as coal mining, tunneling, ventilation, transportation, drainage, and pedestrian movement. These tunnels are interconnected and interwoven, forming a complex underground network system, which is an important infrastructure for underground coal mine production. Through these tunnels, coal mine workers can reach various coal mining and tunneling work sites, and simultaneously achieve transportation of coal and waste rock, delivery of fresh air, and discharge of harmful gases, providing necessary conditions for safe and efficient production in coal mines. The retractable belt conveyor is a commonly used coal mine conveying equipment in underground coal mine tunnels, which can adjust the overall length of the conveyor according to different conveying needs.

[0003] As in the prior art, the Chinese utility model patent with the publication number CN222180709U discloses a "retractable belt conveying equipment for coal mining", which includes a chassis, and further includes: a middle support frame fixedly connected to the top of the chassis; an inlet belt fixedly connected inside the middle support frame; and an outlet belt arranged on the left side of the inlet belt. The retractable belt conveying equipment for coal mining can freely control the length of the retractable belt conveyor.

[0004] The retractable belt conveying equipment in the prior art, including the above, although it can adjust the overall length of the conveyor and the pitch angle or height of the entire conveyor according to different conveying needs, it cannot adjust the inclination angle of the discharge end, which has certain limitations in use.

[0005] Therefore, there is an urgent need for a retractable belt conveyor that can adjust the inclination angle of the discharge end. SUMMARY

[0006] (I) Technical problems to be solved

[0007] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present application provides a retractable belt conveyor for underground coal mine tunnels, which solves the technical problem that the existing retractable belt conveying equipment cannot adjust the inclination angle of the discharge end.

[0008] (II) Technical solutions

[0009] In order to achieve the above-mentioned purposes, the main technical solutions adopted by the present application include:

[0010] The embodiment of the present application provides a kind of telescopic belt conveyor for coal mine underground roadway, including main belt conveyor, extension belt conveyor, telescopic mechanism and turnover mechanism.Extension belt conveyor is located in the downside of main belt conveyor, and telescopic mechanism can drive extension belt conveyor to stretch out or retract along the belt conveying direction relative to main belt conveyor.Wherein, the end of extension belt conveyor close to main belt conveyor is feed end, and the end far from main belt conveyor is discharge end.

[0011] When extension belt conveyor is in fully stretched state, turnover mechanism can drive extension belt conveyor to overturn around its feed end, to adjust the discharge angle of extension belt conveyor, and the discharge end of extension belt conveyor is supported liftable.

[0012] Optionally, turnover mechanism is arranged at the position close to the feed end of extension belt conveyor, which includes fixed shaft, worm gear, U-shaped support and worm.The outer side wall of extension belt conveyor frame is fixedly connected with worm gear through fixed shaft, and fixed shaft penetrates the frame of main belt conveyor and can slide along the belt conveying direction relative to main belt conveyor.U-shaped support is slidably connected to the outer side wall of the frame of main belt conveyor along the belt conveying direction.Worm is rotatably installed in U-shaped support and engaged with worm gear.

[0013] By driving worm to rotate, worm gear can be driven to rotate synchronously, and then extension belt conveyor is driven to overturn through fixed shaft.

[0014] Optionally, on the outer side wall of the frame of main belt conveyor close to turnover mechanism, guiding sliding hole and T-shaped guiding sliding groove along the belt conveying direction are arranged, and they are distributed above and below.Fixed shaft penetrates guiding sliding hole and can slide along guiding sliding hole.U-shaped support is provided with T-shaped sliding block matched with T-shaped guiding sliding groove, so that U-shaped support slides along T-shaped guiding sliding groove.

[0015] When extension belt conveyor stretches out or retracts relative to main belt conveyor, turnover mechanism can move synchronously with extension belt conveyor.

[0016] Optionally, guiding sliding hole is arranged on the outer side wall of main belt conveyor on left and right sides, and the end of guiding sliding hole close to extension belt conveyor is an opening penetrating the outer side wall of main belt conveyor.One auxiliary supporting roller is detachably installed on each side wall of the frame of extension belt conveyor.Two auxiliary supporting rollers are respectively slidably arranged in guiding sliding hole on the same side of them and located close to the opening in guiding sliding hole.

[0017] Before driving extension belt conveyor to overturn, auxiliary supporting roller needs to be removed to avoid motion interference.

[0018] Optionally, turnover mechanism further includes retaining frame, which is fixed on U-shaped support and rotatably connected with the end of fixed shaft protruding from worm gear.

[0019] Optionally, the telescopic mechanism is arranged on the lower side of the extension belt conveyor, which comprises mounting plates, a moving seat, fixed plates, a threaded screw rod and a first driving motor. Two mounting plates are symmetrically arranged along the vertical direction of the belt conveyor and are rotationally connected to the two sides of the rack of the extension belt conveyor. The moving seat is fixedly connected between the two mounting plates. Two fixed plates are fixedly arranged at the two end positions of the bottom of the rack of the main belt conveyor along the belt conveying direction. The threaded screw rod is rotationally arranged between the two fixed plates, and the threaded screw rod penetrates the moving seat and is connected to the moving seat by screwing.

[0020] When the first driving motor drives the threaded screw rod to rotate, the moving seat can move along the belt conveying direction to drive the extension belt conveyor to extend or retract along the belt conveying direction relative to the main belt conveyor through the mounting plates.

[0021] Optionally, the outer side walls on the left and right sides of the rack of the extension belt conveyor are each provided with a fixed shaft. The upper end of the mounting plate is provided with a shaft hole matched with the fixed shaft, and the fixed shaft is rotationally arranged in the shaft hole, so that the extension belt conveyor can be flipped relative to the mounting plate with the fixed shaft as the rotation axis.

[0022] Optionally, the telescopic mechanism further comprises guide rods. Two guide rods are symmetrically fixed between the two fixed plates and are horizontally arranged on the two sides of the threaded screw rod. The two guide rods each penetrate the moving seat to provide guidance for the movement of the moving seat.

[0023] Optionally, the power mechanism for driving the rotation of the rollers of the extension belt conveyor is further provided, so as to drive the belt of the extension belt conveyor to rotate through the rollers. The power mechanism comprises a driven synchronous wheel, a second driving motor, a driving synchronous wheel and a synchronous belt. The second driving motor is fixed to the outer wall of the mounting plate. The driving synchronous wheel is fixed to the output shaft of the second driving motor. The driven synchronous wheel is fixed to one end of the roller of the extension belt conveyor and is in transmission connection with the driving synchronous wheel through the synchronous belt.

[0024] Optionally, the main supports, auxiliary supports and locking universal wheels are further provided. Two main supports are symmetrically fixed to the bottom end of the rack of the main belt conveyor along the belt conveying direction. One auxiliary support is fixed to the bottom end of the rack of the extension belt conveyor away from the main belt conveyor, and the auxiliary support is telescopic in the vertical direction. Two locking universal wheels are symmetrically fixed to the bottom of each main support and auxiliary support.

[0025] (Three) beneficial effects

[0026] The beneficial effects of the present application are:

[0027] This invention discloses a telescopic belt conveyor for underground coal mine roadways, comprising a telescopic mechanism and a tilting mechanism between a main belt conveyor and an extension belt conveyor. The telescopic mechanism drives the extension belt conveyor to extend or retract relative to the main belt conveyor along the belt conveying direction, thereby increasing the overall length of the telescopic belt conveyor. The tilting mechanism drives the extension belt conveyor to tilt around its feed end, adjusting the discharge angle of the extension belt conveyor. Therefore, this invention provides a telescopic belt conveyor for underground coal mine roadways that is convenient to use, easy to adjust, and can meet different conveying needs, thus having a wider range of applications. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of a telescopic belt conveyor for underground coal mine roadways according to the present invention;

[0029] Figure 2 for Figure 1 A magnified view of point A in the image;

[0030] Figure 3 for Figure 1 A schematic diagram of the structure of the belt conveyor after it has been rotated horizontally by 180° (main support hidden).

[0031] Figure 4 for Figure 3 A magnified view of section B in the image;

[0032] Figure 5 for Figure 3 A schematic diagram of the rotating connection between the extended belt conveyor and the mounting plate;

[0033] Figure 6 for Figure 3 A schematic diagram of the secondary support structure.

[0034] [Explanation of Labels in the Attached Image]

[0035] 1: Main belt conveyor; 101: Guide slide hole; 102: T-shaped guide chute;

[0036] 2: Extended belt conveyor; 201: Auxiliary support roller; 202: Limiting rod;

[0037] 3: Tilting mechanism; 31: Fixed shaft; 32: Worm gear; 33: U-shaped support; 331: T-shaped slider; 34: Worm; 35: Third drive motor; 36: Cage;

[0038] 4: Main support frame;

[0039] 5: auxiliary support; 51: U-shaped base frame; 511: cavity; 512: first positioning groove; 52: adjustable support column; 521: second positioning groove; 53: locking bolt;

[0040] 6: locking universal wheel;

[0041] 7: idler;

[0042] 8: telescopic mechanism; 81: mounting plate; 811: shaft hole; 812: arc waist hole; 82: moving seat; 83: fixing plate; 84: threaded screw rod; 85: first driving motor; 86: guide rod;

[0043] 9: power mechanism; 91: driven synchronous wheel; 92: second driving motor; 93: driving synchronous wheel; 94: synchronous belt. DETAILED DESCRIPTION

[0044] In order to better explain the present application, so as to be understood, the following specific embodiments, combined with the drawings, the present application is described in detail. In this paper, the "upper", "lower", "left", "right" and other orientation of the text with the orientation of the reference. Figure 1

[0045] In order to better understand the above technical solutions, the following will be described in more detail with reference to the exemplary embodiments of the present application. Although the drawings show the exemplary embodiments of the present application, it should be understood that the present application can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to make the present application more clearly, thoroughly, and to convey the scope of the present application to those skilled in the art.

[0046] Example 1:

[0047] Referring to Figure 1 , the present embodiment provides a telescopic belt conveyor for underground coal mine roadway, which comprises a main belt conveyor 1, an extension belt conveyor 2, a telescopic mechanism 8, a turnover mechanism 3, a power mechanism 9, a main support 4, an auxiliary support 5 and a locking universal wheel 6.

[0048] ​The extension belt conveyor 2 is located at the lower side of the main belt conveyor 1, and the telescopic mechanism 8 can drive the extension belt conveyor 2 to extend or retract along the belt conveying direction compared with the main belt conveyor 1. The end of the extension belt conveyor 2 close to the main belt conveyor 1 is the feeding end, and the end away from the main belt conveyor 1 is the discharging end. When the extension belt conveyor 2 is in the fully extended state compared with the main belt conveyor 1, the turnover mechanism 3 can drive the extension belt conveyor 2 to turn around the feeding end to adjust the discharging angle of the extension belt conveyor 2, and the discharging end of the extension belt conveyor 2 is supported in a liftable manner. Then, two main supports 4 are fixed to the bottom end of the frame of the main belt conveyor 1 along the belt conveying direction, and the lower ends of the two main supports 4 are preferably fixed and connected as an integral structure by a connecting plate. A secondary support 5 is fixed to the bottom end of the frame of the extension belt conveyor 2 away from the main belt conveyor 1, and the secondary support 5 is telescopic in the vertical direction to provide liftable support for the discharging end of the extension belt conveyor 2. Further, two locking universal wheels 6 are fixed to the bottom of each main support 4 and secondary support 5. The main support 4 is used to stably support the main belt conveyor 1, and the locking universal wheels 6 at the bottom facilitate the movement of the conveyor. The secondary support 5 is used to assist in supporting and positioning the extension belt conveyor 2, ensuring that the extension belt conveyor 2 still has high stability when extended to the maximum position, and the locking universal wheels 6 at the bottom facilitate the movement of the secondary support 5 when extended or retracted. At the same time, the secondary support 5 and the locking universal wheels 6 at the bottom also ensure that the extension belt conveyor 2 can be horizontal in the initial state.

[0049] As shown in Figure 3 The telescopic mechanism 8 is located at the lower side of the extension belt conveyor 2, and includes a mounting plate 81, a moving seat 82, a fixed plate 83, a threaded screw rod 84, a first driving motor 85, and a guide rod 86.

[0050] Two installation plates 81 are symmetrically distributed in the vertical direction of the belt conveying, and are rotationally connected to the two sides of the frame of the extended belt conveyor 2. The moving seat 82 is fixedly connected between the two installation plates 81, and is preferably connected to the lower ends of the two installation plates 81. Two fixed plates 83 are fixed to the two end positions of the bottom of the frame of the main belt conveyor 1 in the belt conveying direction. Further, a threaded screw rod 84 is rotationally installed between the two fixed plates 83, and the threaded screw rod 84 penetrates through the moving seat 82 and is connected to the moving seat 82 by screwing. The first driving motor 85 is fixed outside the fixed plate 83, and the output end thereof is connected to the threaded screw rod 84, for driving the threaded screw rod 84 to rotate. When the first driving motor 85 drives the threaded screw rod 84 to rotate, the moving seat 82 can be moved in the belt conveying direction, so as to drive the extended belt conveyor 2 to extend or retract in the belt conveying direction compared with the main belt conveyor 1 through the installation plate 81, that is, in use, the first driving motor 85 is started to drive the threaded screw rod 84 to rotate, and under the screwing action, the moving seat 82 drives the extended belt conveyor 2 to move. In order to further improve the stability of the extended belt conveyor 2 during movement, two guide rods 86 are fixedly arranged between the two fixed plates 83, and the two guide rods 86 are horizontally arranged at the two sides of the threaded screw rod 84, and the two guide rods 86 both penetrate through the moving seat 82. That is, the moving seat 82 is provided with through holes for the guide rods 86 to penetrate, and there is a certain gap between the through holes and the guide rods 86, so that the moving seat 82 can slide on the guide rods 86, thereby providing a guiding effect for the movement of the moving seat 82, that is, the stability of the extended belt conveyor 2 can be further improved by improving the stability of the moving seat 82.

[0051] As Figure 2As shown, the turnover mechanism 3 is arranged near the feeding end of the extended belt conveyor 2, which comprises a fixed shaft 31, a worm wheel 32, a U-shaped support 33 and a worm 34. The outer side wall of the frame of the extended belt conveyor 2 is fixedly connected with the worm wheel 32 through the fixed shaft 31, and the fixed shaft 31 penetrates the frame of the main belt conveyor 1 and can slide along the belt conveying direction compared with the main belt conveyor 1. As a preferred embodiment, the fixed shaft 31 is fixed on the outer side wall of the frame of the extended belt conveyor 2, and a guide sliding hole 101 along the belt conveying direction is arranged on the outer side wall of the frame of the main belt conveyor 1 near the end of the turnover mechanism 3. The fixed shaft 31 penetrates the guide sliding hole 101 and can slide along the guide sliding hole 101 (i.e. along the belt conveying direction). The worm wheel 32 is fixed on the end of the fixed shaft 31 away from the extended belt conveyor 2. Preferably, a rubber sleeve 37 is sleeved on the fixed shaft 31, and the fixed shaft 31 is adhesively fixed with the rubber sleeve 37. Since the rubber sleeve 37 has a certain flexibility, it can effectively reduce the sliding friction between the fixed shaft 31 and the inner wall of the guide sliding hole 101. Of course, it is not limited to this, and the rubber sleeve 37 can also be replaced by a bearing. The outer ring of the bearing is in contact with the inner wall of the guide sliding hole 101, so that the sliding friction is changed into the rolling of the outer ring of the bearing.

[0052] Further, the U-shaped support 33 is slidingly connected to the outer side wall of the frame of the main belt conveyor 1 along the belt conveying direction, and the worm 34 is rotatably installed in the U-shaped support 33. The worm 34 corresponds to the position of the worm wheel 32 and is in meshing engagement with the worm wheel 32. As a preferred embodiment, a T-shaped guide sliding groove 102 along the belt conveying direction is also arranged on the outer side wall of the frame of the main belt conveyor 1 near the end of the turnover mechanism 3. The guide sliding groove 102 is arranged on the frame of the main belt conveyor 1 in an upper and lower distribution manner with the guide sliding hole 101, and the relative positions therebetween need to be set in coordination with the relative positions of the worm 34 and the worm wheel 32. The U-shaped support 33 is provided with a T-shaped sliding block 331 matched with the T-shaped guide sliding groove 102. The T-shaped sliding block 331 can be fixedly connected to the outer wall of the U-shaped support 33 or can be integrally formed with the U-shaped support 33. The T-shaped sliding block 331 can be embedded in the T-shaped guide sliding groove 102 and slide along the T-shaped guide sliding groove 102 (i.e. along the belt conveying direction), so as to make the U-shaped support 33 slide along the T-shaped guide sliding groove 102. Therefore, the U-shaped support 33 is slidingly connected to the outer side wall of the frame of the main belt conveyor 1 through the cooperation of the T-shaped sliding block 331 and the T-shaped guide sliding groove 102, which can effectively improve the stability of the movement of the U-shaped support 33.

[0053] The cooperation of the guide sliding hole 101 and the fixed shaft 31 and the cooperation of the T-shaped guide sliding groove 102 and the T-shaped sliding block 331 enable the turnover mechanism 3 to move synchronously with the extension belt conveyor 2 when the extension belt conveyor 2 is extended or retracted relative to the main belt conveyor 1. In order to further improve the stability of the extension belt conveyor 2, an auxiliary supporting roller 201 can be arranged in the guide sliding hole 101. Specifically, the outer side walls on the left and right sides of the main belt conveyor 1 are each provided with a guide sliding hole 101, and the end of the guide sliding hole 101 close to the extension belt conveyor 2 is an opening penetrating the outer side wall of the main belt conveyor 1. Further, on the left and right side walls of the rack of the extension belt conveyor 2, an auxiliary supporting roller 201 can be detachably installed at a position corresponding to the guide sliding hole 101, and the two auxiliary supporting rollers 201 are respectively arranged in the guide sliding hole 101 on the same side thereof and located at a position close to the opening of the guide sliding hole 101. The auxiliary supporting roller 201 can further support the extension belt conveyor 2 to ensure its stability during movement. It should be noted that when the inclination angle of the extension belt conveyor 2 needs to be adjusted, the auxiliary supporting roller 201 needs to be moved out of the guide sliding hole 101, that is, the auxiliary supporting roller 201 needs to be removed before driving the extension belt conveyor 2 to turn, so as to avoid motion interference.

[0054] Then, by driving the worm 34 to rotate, the worm gear 32 can be driven to rotate synchronously, and then the extension belt conveyor 2 is driven to turn by the fixed shaft 31. Preferably, the worm 34 is driven to rotate by a third driving motor 35 fixed on the outer wall of one side of the U-shaped support 33, and the output shaft of the third driving motor 35 is fixedly connected with the worm 34. Further, in order to ensure the stability of the turnover mechanism 3 during operation and avoid large vibration during transmission of the components, a retainer 36 can be additionally arranged in the turnover mechanism 3. The retainer 36 is fixed on the U-shaped support 33 and rotatably connected with the end of the fixed shaft 31 extending out of the worm gear 32. Specifically, the retainer 36 has an L-shaped structure, the angle between the two edges of the L-shaped structure is obtuse, the free ends of the two edges are respectively connected to the two side walls of the U-shaped support 33, and the intersection of the two edges is rotatably connected with the extending end of the fixed shaft 31 by a bearing. It can also be understood that the retainer 36 is arranged above the worm gear 32, and forms a triangular structure with the two side walls of the U-shaped support 33 and the fixed shaft 31, so as to improve the stability of the fixed shaft 31 and ensure that the extension belt conveyor 2 can reliably drive the turnover mechanism 3 to move when extending or retracting.

[0055] It should be noted that in the turnover mechanism 3, the transmission ratio of the worm 34 and the worm gear 32 is preferably set to 1:30 (other ratios can also be designed as needed, but not too small), to have the function of speed reduction and torque amplification. For example, the third drive motor 35 (rated power of 5.5kW, rated speed of 1450rpm), which outputs a torque of about 36N•m under rated operating conditions (calculated according to the torque formula, torque T=9550×rated power P / rated speed n), and then through the worm 34 and the worm gear 32, the output torque can be amplified from about 36N•m to more than 8000N•m.

[0056] The weight of the extension belt conveyor 2 (including the frame) should not be too high (about 500kg), and the turnover radius (such as 1.2m), then according to the existing formula, the maximum turnover torque required is about 6000N•m, and the amplified torque of the third drive motor 35 can fully cover it.

[0057] As shown in Figure 5 As a preferred embodiment, the rotational connection between the mounting plate 81 and the extension belt conveyor 2 can be achieved by the following structure, that is, a fixed shaft 31 is arranged on the outer side wall of the left and right sides of the frame of the extension belt conveyor 2, and then a shaft hole 811 adapted to the fixed shaft 31 is formed on the upper end of the mounting plate 81, and the fixed shaft 31 is rotatably installed in the shaft hole 811. The shaft hole 811 on the mounting plate 81 and the fixed shaft 31 are clearance-fitted, or a bearing is arranged therebetween for connection, so that the mounting plate 81 and the bottom end of the frame of the extension belt conveyor 2 form a rotational connection, and the rotation of the fixed shaft 31 will drive the extension belt conveyor 2 to rotate around the fixed shaft 31 as the rotation axis, relative to the mounting plate 81.

[0058] In order to limit the turning angle of the extension belt conveyor 2 and avoid collision with the rack during the turning process, a limiting rod 202 is fixed on the side of the rack of the extension belt conveyor 2, and an arc-shaped waist hole 812 is formed on the mounting plate 81 corresponding to the position of the limiting rod 202. During the turning process of the belt conveyor 2, the limiting rod 202 fixed on the side of the rack of the extension belt conveyor 2 will slide along the arc-shaped waist hole 812 on the mounting plate 81. The arc-shaped trajectory of the arc-shaped waist hole 812 matches the turning trajectory of the extension belt conveyor 2 around the fixed shaft 31, which not only provides a sliding space for the limiting rod 202 and ensures smooth turning, but also forms a physical barrier for the limiting rod 202 through the two end hole walls of the arc-shaped waist hole 812, thereby limiting the maximum turning angle of the extension belt conveyor 2 (to avoid excessive turning and cause interference between the extension belt conveyor 2 and the support, roadway wall, etc. At the same time, the structural stability of the extension belt conveyor 2 during the turning process is further improved to prevent shaking or deviation during the turning process, so as to adapt to the complex space environment of the coal mine underground roadway and the safety operation requirements. The turning range of the extension belt conveyor 2 is preferably within ±30°.

[0059] The turning of the extension belt conveyor 2 can be upward or downward to adapt to different unloading scenarios, for example:

[0060] When unloading to a high place (such as transferring to a branch chute above the roadway, a transfer point or a high-level storage device), there is water or silt at the bottom of the roadway, and the discharge end needs to be lifted to avoid pollution or equipment from being wet, or when lifting the operation to realize close-range high-place material conveying in cooperation with the heading face, the extension belt conveyor 2 can be driven to turn upward.

[0061] When unloading to a low place (such as unloading into a mine car, a scraper conveyor or a low-level chute at the bottom of the roadway), the space above the roadway is narrow (low-clearance roadway), upward conveying is limited, or material grading conveying needs to be connected to a low-position device, the extension belt conveyor 2 can be driven to turn downward.

[0062] The telescopic belt conveyor shown in the embodiment is arranged at a material conveying station in a coal mine underground roadway during use, the main belt conveyor 1 and the extension belt conveyor 2 are started, the coal is conveyed to the extension belt conveyor 2 by the main belt conveyor 1, and then conveyed by the extension belt conveyor 2.

[0063] When the total conveying length needs to be adjusted, the adjusting mechanism 8 is started, the first driving motor 85 drives the threaded screw rod 84 to rotate, and since the moving seat 82 is connected with the threaded screw rod 84 through a threaded screwing mode, the moving seat 82 will drive the extension belt conveyor 2 to move, so that the extension belt conveyor 2 is extended to a suitable position, so as to expand the overall length of the telescopic belt conveyor and meet different conveying requirements.

[0064] When it is necessary to drive the extension belt conveyor 2 to overturn to adjust the angle of the discharge end, it is further necessary to drive the extension belt conveyor 2 to extend to a non-interference position close to the end of the main belt conveyor 1 (to avoid collision with the rack of the main belt conveyor 1 during overturning) by the adjusting mechanism 8. Then, the overturning mechanism 3 is started, the worm 34 is driven to rotate by the third driving motor 35, the worm 34 drives the worm wheel 32 to rotate through meshing transmission, the worm wheel 32 is rigidly fixed with the fixed shaft 31, and then the fixed shaft 31 is driven to rotate around its own axis, because the mounting plate 81 is provided with the shaft hole 811 for the fixed shaft 31 to penetrate, when the fixed shaft 31 rotates, the extension belt conveyor 2 is driven to rotate around the fixed shaft 31 as the rotating shaft, and the mounting plate 81 is stably overturned. During overturning, it can be selected to overturn upward or downward according to the conveying requirements, so as to meet different conveying requirements, and the application range is wide.

[0065] It should be noted that, in order to avoid motion interference, the overturning mechanism 3 can be started only when the extension belt conveyor 2 extends to the position close to the end of the main belt conveyor 1 to adjust the angle of the extension belt conveyor 2. In addition, the belt conveyor is a very common conveying equipment on the market, and specific reference can be made to the belt conveyor in the prior art, and excessive details will not be described herein.

[0066] Further, as the height of the extension belt conveyor 2 far from the main belt conveyor 1 end changes when it is turned over, the sub support 5 in the embodiment is telescopic in the vertical direction to adapt to the change in height. As a preferred embodiment, the sub support 5 comprises a U-shaped chassis 51, adjustable struts 52 and locking bolts 53. The free ends of the two vertical beams of the U-shaped chassis 51 are provided with cavities 511. The two adjustable struts 52 are symmetrically distributed left and right, the top ends of which are respectively rotatably connected with the racks of the left and right sides of the extension belt conveyor 2, and the relative position relationship between the adjustable struts 52 and the racks of the extension belt conveyor 2 can be selectively locked (i.e. the relative rotation between them is allowed when the extension belt conveyor 2 is turned over, and is locked after turning over to prohibit the relative rotation between them). The bottom ends of the adjustable struts 52 are respectively slidably embedded in the cavities 511 of the two vertical beams of the U-shaped chassis 51 to form a telescopic structure. Further, a first positioning groove 512 is provided at the upper end of each of the two vertical beams of the U-shaped chassis 51 (the region overlapping the adjustable struts 52), and a plurality of second positioning grooves 521 are provided on each of the two adjustable struts 52 and are equally spaced in the telescopic direction. The first positioning groove 512 and the second positioning groove 521 are provided at the same side, and the first positioning groove 512 can be selectively aligned with any second positioning groove 521 at the same side. The locking bolt 53 is installed in the first positioning groove 512 on the U-shaped chassis 51 by screwing and is embedded in the second positioning groove 521 corresponding to the first positioning groove 512 to fix the relative position of the U-shaped chassis 51 and the adjustable struts 52. The second positioning grooves 521 provided on the adjustable struts 52 on both sides should be correspondingly provided to be able to synchronously adjust the height on both sides, so that the extension belt conveyor 2 can remain balanced.

[0067] In use, when the extension belt conveyor 2 is in horizontal conveying or extended to a specified length, the bottom end of the adjustable strut 52 is embedded in the cavity 511 of the U-shaped chassis 51 at this time, and according to the flatness of the roadway and the horizontal requirement of the extension belt conveyor 2, the extension length of the adjustable strut 52 in the cavity 511 can be adjusted to make the locking universal wheel 6 at the bottom end of the U-shaped chassis 51 smoothly adhere to the ground.

[0068] After the height is adjusted in place, the locking bolt 53 on the U-shaped chassis 51 is tightened, so that one end of the locking bolt 53 is embedded in the second positioning groove 521 at the corresponding position of the adjustable strut 52. Through the clamping action of the second positioning groove 521 and the locking bolt 53, the relative sliding of the adjustable strut 52 and the U-shaped chassis 51 is limited, thereby providing stable support for the distal end of the extension belt conveyor 2, avoiding tilting due to material load or roadway vibration.

[0069] When it is needed to drive the extension belt conveyor 2 to overturn, the locking bolt 53 is loosened first, the adjustable support 52 is retracted into the cavity 511, and then the locking bolt 53 is locked, so that the belt locking universal wheel 6 at the bottom end of the U-shaped chassis 51 is separated from the ground, avoiding interference with the ground or tunnel obstacles during overturning. After the extension belt conveyor 2 is overturned to the target angle around the fixed shaft 31, according to the height requirement of the distal end of the extension belt conveyor 2 after overturning, the locking bolt 53 is loosened to move downward to adjust the U-shaped chassis 51, so that the belt locking universal wheel 6 at the bottom end of the U-shaped chassis 51 is attached to the ground, and then the locking bolt 53 is tightened and embedded in the second positioning groove 521. The auxiliary support 5 can provide auxiliary support for the overturned extension belt conveyor 2, improve the structural stability of the extension belt conveyor 2 in the inclined conveying state, and prevent the extension belt conveyor 2 from being deviated due to the gravity of the material.

[0070] Another possible embodiment can be achieved by setting a hydraulic support between the auxiliary support 5 and the rack of the extension belt conveyor 2 to realize the liftable support of the auxiliary support 5 to the extension belt conveyor 2. The height of the auxiliary support 5 can be adjusted by the extension and retraction of the hydraulic support, which can realize more accurate adjustment. Those skilled in the art can select the liftable mode of the auxiliary support 5 according to actual needs.

[0071] When the hydraulic support is used for support, if the space for unloading is limited and interference may occur, the hydraulic support can be retracted to the direction close to the auxiliary support 5, so that the belt locking universal wheel 6 is separated from the bottom surface. After the extension belt conveyor 2 is overturned, the hydraulic support is elongated to make the belt locking universal wheel 6 adhere to the ground to form stable support. If the space for unloading is large and stable support can be provided, the hydraulic support can be retracted to the direction close to the auxiliary support 5, so that the belt locking universal wheel 6 is separated from the bottom surface. After the extension belt conveyor 2 is overturned, the hydraulic support is elongated to make the belt locking universal wheel 6 adhere to the ground to form stable support. If the space for unloading is large and stable support can be provided, the hydraulic support can be retracted to the direction close to the auxiliary support 5, so that the belt locking universal wheel 6 is separated from the bottom surface. After the extension belt conveyor 2 is overturned, the hydraulic support is elongated to make the belt locking universal wheel 6 adhere to the ground to form stable support.

[0072] Embodiment 2:

[0073] Referring to Figure 4 , the embodiment proposes a telescopic belt conveyor for underground mine roadway, which is different from embodiment 1 in that it further comprises a power mechanism 9 for driving the rotation of the idler of the extension belt conveyor 2, and then driving the rotation of the belt of the extension belt conveyor 2 through the idler. The rest of the structure is the same as that of embodiment 1, which will not be described here.

[0074] It is known that the belt conveyor is usually driven by a motor and a speed reducer directly, but when the extension belt conveyor 2 is combined with the main belt conveyor 1, the rack of the main belt conveyor 1 will hinder the motor and the speed reducer, thus the existing driving mode needs to be optimized, and in the embodiment, the power mechanism 9 comprises a driven synchronous wheel 91, a second driving motor 92, a driving synchronous wheel 93 and a synchronous belt 94. The second driving motor 92 is fixed to the outer wall of the mounting plate 81, the driving synchronous wheel 93 is fixed on the output shaft of the second driving motor 92, and the driven synchronous wheel 91 is fixed to one end of the carrier roller 7 of the extension belt conveyor 2 and is in driving connection with the driving synchronous wheel 93 through the synchronous belt 94.

[0075] The driving synchronous wheel 93 is driven to rotate by the second driving motor 92, the driving synchronous wheel 93 drives the driven synchronous wheel 91 to rotate through the synchronous belt 94, and the driven synchronous wheel 91 drives the carrier roller of the extension belt conveyor 2 to rotate, thereby making the belt of the extension belt conveyor 2 rotate, so that the problem of limited installation space and easy interference is solved.

[0076] It should be noted that the first driving motor 85, the second driving motor 92 and the third driving motor 35 are all conventional devices purchased in the market, and the power switch is built-in, and the person skilled in the art can make a conventional selection according to the use requirement, the working principle thereof is the common sense known by the person skilled in the art and has been fully disclosed by the prior art, and excessive details will not be described herein.

[0077] In the description of the present application, it should be understood that the terms "first", "second" are only used for descriptive purpose, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0078] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can be detachable connection, or can be integrated; can be mechanical connection, or can be electrical connection; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication inside two elements or the interaction relationship between two elements. For the person skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0079] In the present application, unless otherwise explicitly specified and limited, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature is "over", "above" and "on top of" a second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. A first feature is "under", "below" and "underneath" a second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.

[0080] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without contradiction.

[0081] Although the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are exemplary and are not to be construed as limiting the present application, and the person skilled in the art can make changes, modifications, replacements and variations to the above-described embodiments within the scope of the present application.

Claims

1. A telescopic belt conveyor for underground coal mine roadways, characterized in that: It includes a main belt conveyor (1), an extension belt conveyor (2), a telescopic mechanism (8), and a tilting mechanism (3); The extended belt conveyor (2) is located below the main belt conveyor (1), and the telescopic mechanism (8) can drive the extended belt conveyor (2) to extend or retract relative to the main belt conveyor (1) in the belt conveying direction. The end of the extended belt conveyor (2) closest to the main belt conveyor (1) is the feed end, and the end furthest from the main belt conveyor (1) is the discharge end. When the extended belt conveyor (2) is in a fully extended state, the flipping mechanism (3) can drive the extended belt conveyor (2) to flip around its feed end to adjust the discharge angle of the extended belt conveyor (2), and the discharge end of the extended belt conveyor (2) is supported in a liftable manner.

2. The telescopic belt conveyor for underground coal mine roadways as described in claim 1, characterized in that: The flipping mechanism (3) is located near the feed end of the extended belt conveyor (2), and includes a fixed shaft (31), a worm gear (32), a U-shaped support (33) and a worm (34). The outer wall of the frame of the extended belt conveyor (2) is fixedly connected to the worm gear (32) through the fixed shaft (31), and the fixed shaft (31) passes through the frame of the main belt conveyor (1) and can slide relative to the main belt conveyor (1) in the belt conveying direction. The U-shaped support (33) is slidably connected to the outer wall of the frame of the main belt conveyor (1) along the belt conveying direction; The worm (34) is rotatably mounted in the U-shaped support (33) and meshes with the worm wheel (32); By driving the worm (34) to rotate, the worm wheel (32) can be driven to rotate synchronously, thereby driving the extended belt conveyor (2) to flip through the fixed shaft (31).

3. The telescopic belt conveyor for underground coal mine roadways as described in claim 2, characterized in that: On the outer side wall of the frame of the main belt conveyor (1) near the overturning mechanism (3), there are guide slide holes (101) and T-shaped guide slide grooves (102) along the belt conveying direction, which are distributed vertically. The fixed shaft (31) is disposed through the guide sliding hole (101) and can slide along the guide sliding hole (101); The U-shaped support (33) is provided with a T-shaped slider (331) that cooperates with the T-shaped guide groove (102) so that the U-shaped support (33) slides along the T-shaped guide groove (102); When the extended belt conveyor (2) extends or retracts relative to the main belt conveyor (1), the flipping mechanism (3) can move synchronously with the extended belt conveyor (2).

4. The telescopic belt conveyor for underground coal mine roadways as described in claim 3, characterized in that: The main belt conveyor (1) is provided with guide sliding holes (101) on the outer side walls on both the left and right sides, and the guide sliding hole (101) is an opening that penetrates the outer side wall of the main belt conveyor (1) at the end near the extension belt conveyor (2). An auxiliary support roller (201) can be detachably installed on both sides of the frame of the extended belt conveyor (2). The two auxiliary support rollers (201) are respectively slidably disposed in the guide slide hole (101) on the same side, and are located in the guide slide hole (101) near its opening; Before driving the belt conveyor (2) to flip, the auxiliary support roller (201) needs to be removed to avoid motion interference.

5. A telescopic belt conveyor for underground coal mine roadways as described in claim 2, characterized in that: The flipping mechanism (3) also includes a retainer (36); The retainer (36) is fixed on the U-shaped support (33) and is rotatably connected to one end of the fixed shaft (31) that extends out of the worm gear (32).

6. The telescopic belt conveyor for underground coal mine roadways as described in claim 2, characterized in that: The telescopic mechanism (8) is located on the lower side of the extended belt conveyor (2), and includes a mounting plate (81), a movable seat (82), a fixed plate (83), a threaded screw (84), and a first drive motor (85). The two mounting plates (81) are symmetrically distributed perpendicular to the belt conveying direction and are rotatably connected to both sides of the frame of the extended belt conveyor (2); The movable base (82) is fixedly connected between the two mounting plates (81); The two fixing plates (83) are fixed at both ends of the bottom of the frame of the main belt conveyor (1) along the belt conveying direction; The threaded screw (84) is rotatably mounted between the two fixed plates (83), and the threaded screw (84) passes through the movable seat (82) and is connected to the movable seat (82) by thread engagement; The first drive motor (85) is fixed on the outside of the fixed plate (83), and its output end is connected to the threaded screw (84) to drive the threaded screw (84) to rotate; When the first drive motor (85) drives the threaded screw (84) to rotate, the movable seat (82) can move along the belt conveying direction, so as to drive the extension belt conveyor (2) to extend or retract relative to the main belt conveyor (1) along the belt conveying direction through the mounting plate (81).

7. A telescopic belt conveyor for underground coal mine roadways as described in claim 6, characterized in that: The fixed shaft (31) is provided on the outer side walls of both the left and right sides of the frame of the extended belt conveyor (2). The mounting plate (81) has a shaft hole (811) at its upper end that is adapted to the fixed shaft (31). The fixed shaft (31) is rotatably installed in the shaft hole (811) so that the extended belt conveyor (2) can rotate relative to the mounting plate (81) with the fixed shaft (31) as the axis of rotation.

8. A telescopic belt conveyor for underground coal mine roadways as described in claim 6, characterized in that: The telescopic mechanism (8) also includes a guide rod (86). The two guide rods (86) are symmetrically fixed between the two fixing plates (83), and the guide rods (86) are horizontally arranged on both sides of the threaded screw (84); Both guide rods (86) pass through the movable seat (82) to provide guidance for the movement of the movable seat (82).

9. A telescopic belt conveyor for underground coal mine roadways as described in claim 6, characterized in that: It also includes a power mechanism (9) for driving the idler rollers of the extended belt conveyor (2) to rotate, thereby driving the belt of the extended belt conveyor (2) to rotate through the idler rollers; The power mechanism (9) includes a driven synchronous pulley (91), a second drive motor (92), a driving synchronous pulley (93), and a synchronous belt (94). The second drive motor (92) is fixed to the outer wall of the mounting plate (81); The active synchronizing pulley (93) is fixed on the output shaft of the second drive motor (92); The driven synchronous pulley (91) is fixed to one end of the idler roller (7) of the extended belt conveyor (2) and is connected to the driving synchronous pulley (93) via the synchronous belt (94).

10. A telescopic belt conveyor for underground coal mine roadways as described in claim 1, characterized in that: It also includes a main support (4), a secondary support (5), and a lockable caster wheel (6); The two main supports (4) are symmetrically fixed to the bottom of the frame of the main belt conveyor (1) along the belt conveying direction; One of the sub-supports (5) is fixed to the bottom end of the frame of the extended belt conveyor (2) away from the main belt conveyor (1), and the sub-support (5) is a telescopic structure in the vertical direction; Each of the main brackets (4) and the sub-brackets (5) has two lockable casters (6) fixed symmetrically at its bottom.

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