Large angle belt conveyor lifting mechanism

Abstract

This invention discloses a lifting mechanism for a high-angle belt conveyor, belonging to the field of open-pit mine end-side material conveying. It includes a ground hinge, a frame, standard support frames, a top support frame, a hydraulic cylinder, a sliding beam, a balance beam, and a guide frame. The lower end of the frame is hinged to the ground hinge, and the upper end is connected to the top support frame via multiple detachable, stacked standard support frames. The top support frame is used to hinge the conveyor frame. The guide frame is fixed to the frame, and the sliding beam is sleeved on the guide frame and can slide up and down. One end of the hydraulic cylinder is hinged to the frame or the ground hinge, and the other end is simultaneously hinged to the sliding beam and the balance beam. The balance beam has a movable top seat that is detachably connected to the standard support frames. When the hydraulic cylinder extends, it can lift the standard support frames to be installed or removed, completing their connection or separation with adjacent structures, realizing the adjustment of the total length of the lifting mechanism. Its structure is stable and reliable, flexible in adjustment, and easy to operate. It can quickly adapt to changes in end-side slope and significantly shorten downtime.

Description

Technical Field

[0001] This invention belongs to the field of open-pit mine end-side material conveying technology, and particularly relates to a lifting mechanism for a large-angle belt conveyor. Background Technology

[0002] The steep-angle belt conveyor is a conveying equipment used for lifting materials at large angles. It has a compact structure, saves space, and is suitable for continuous material transportation from the pit to the surface in open-pit mines.

[0003] During open-pit mining, as the mining area expands and the working face advances, the slope of the side walls constantly changes. Conventional conveying equipment is designed with specific needs in mind; its core parameters, such as lifting height and inclination angle, are calculated and determined based on the specific terrain slope. Once a set of equipment is put into use, it is only suitable for material transportation under that fixed slope condition, and its operating state is "locked" within the initial design conditions. When the side wall slope changes, conventional conveying equipment struggles to adapt to this dynamic change, requiring overall equipment adjustments and increasing production and operating costs.

[0004] However, when the slope of the end wall changes significantly, a completely new set of conveying equipment must be redesigned, manufactured, and installed. This not only has a long cycle and high investment, but also causes production interruption and economic losses during construction. Summary of the Invention

[0005] To address the shortcomings of existing technologies, the purpose of this invention is to provide a lifting mechanism for a belt conveyor with a large inclination angle.

[0006] The technical solution adopted in this invention is: a lifting mechanism for a belt conveyor with a large inclination angle, the key technical points of which include: Ground hinge, fixed to the ground; The frame has its lower end hinged to the ground hinge seat and its upper end supported by a standard support frame; The standard support frame is a truss steel structure, and multiple standard support frames are detachably stacked in sequence between the frame and the top support frame in the vertical direction; A top support frame, the lower end of which is connected to the uppermost standard support frame, and the upper end of which is provided with a hinge for hinged to the conveyor frame; Hydraulic cylinders, sliding beams, balance beams, and guide frames. The guide frame is fixed to the frame and extends vertically. The sliding beam is sleeved on the guide frame and can slide up and down along the guide frame. One end of the hydraulic cylinder is hinged to the frame, and the other end is hinged to both the sliding beam and the balance beam via a pin. The balance beam is disposed above the sliding beam. The balance beam is provided with a movable top seat, and the movable top seat is provided with a slot. The movable top seat is detachably connected to the standard support frame through the slot. When the hydraulic cylinder extends, it can drive the sliding beam and the balance beam to slide upward along the guide frame, thereby lifting the standard support frame to be installed or removed through the movable top seat. In this lifted state, the standard support frame can be detached from the adjacent standard support frame, the frame or the top support frame, thereby realizing the adjustment of the total length of the lifting mechanism.

[0007] In the above scheme, the slot opened on the movable top seat is a U-shaped slot with the opening facing downwards, and the balance beam is provided with a retaining shaft on both sides, and the retaining shaft is engaged in the slot.

[0008] In the above scheme, the upper part of the movable top seat is inserted into the side hole of the standard support frame through a positioning pin, and the lower part of the movable top seat is inserted into the corresponding hole of the adjacent lower standard support frame or the frame through double pins.

[0009] In the above scheme, the sliding beam has sleeve structures on both sides, and the two sleeves are respectively sleeved on the two guide posts of the guide frame. The sleeves and the guide posts are clearance fit so that the sliding beam can slide up and down along the axial direction of the guide posts.

[0010] In the above scheme, the standard support frame is a truss steel structure with a rectangular cross section, and the connecting lugs between two adjacent standard support frames are connected by bolts.

[0011] In the above scheme, the height H of the standard support frame is a fixed value, and the maximum single extension distance of the hydraulic cylinder is equal to or greater than the height H, so as to provide operating space for the installation or removal of a single standard support frame.

[0012] In the above scheme, there are two hydraulic cylinders, which are symmetrically arranged on the left and right sides of the lifting mechanism. The upper extension rods of the two hydraulic cylinders are simultaneously hinged to the middle of the sliding beam and the middle of the balance beam through the same through pin.

[0013] In the above scheme, when it is necessary to increase the total length of the lifting mechanism, the hydraulic cylinder extends to lift the sliding beam and the balance beam by the height H of a standard support frame. The standard support frame to be installed is then inserted between the frame and the already installed standard support frame, so that the lower end of the standard support frame to be installed is connected to the upper end of the frame and the upper end is connected to the lower end of the already installed standard support frame. The standard support frame to be installed is temporarily supported by the movable top seat. Subsequently, the hydraulic cylinder retracts and resets.

[0014] Compared with existing technologies, the advantages of this invention are as follows: This invention utilizes a combination of a standard support frame and a hydraulic device to construct the lifting mechanism for a high-angle belt conveyor. The hydraulic device performs the changing motion, while the support frame provides support. Simultaneously, by increasing or decreasing the overall length of the lifting mechanism using a standard-length support frame, the conveying angle of the high-angle belt conveyor can be varied. This method firstly utilizes the support frame, i.e., the truss steel structure, to directly bear the supporting force. Facing the vibrations and impacts generated during the operation of the high-angle belt conveyor, the steel structure is more stable and reliable.

[0015] Secondly, when a large-angle belt conveyor requires a wider range of angle changes, this invention can simply add or remove the corresponding number of standard support frames, offering greater flexibility. If hydraulic cylinders, commonly used in luffing mechanisms, are employed, the stroke of the hydraulic cylinders is fixed and may not meet the requirements for large-range changes.

[0016] In addition, engineering machinery can be directly deployed on-site to complete the installation and dismantling of standard support frames. The operation is simple and can be carried out as needed, which not only eliminates the complexity of large-scale hoisting, but also greatly shortens the non-production downtime, providing a strong guarantee for high-yield and efficient mining. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 A schematic diagram of the overall structure of a high-angle belt conveyor; Figure 2 Schematic diagram of the lifting mechanism of a belt conveyor with a large inclination angle; Figure 3 This is a schematic diagram of the lifting mechanism's transformation principle, where (a) is the initial retracted state, (b) is the support frame jacking state, (c) is the sliding beam pushing transition state, and (d) is the fully extended working state.

[0019] Figure 4 A schematic diagram of the conveyor operating at a small tilt angle when the lifting mechanism is in a low position; Figure 5 A schematic diagram of the conveyor operating at a large tilt angle when the lifting mechanism is in a high position; Figure 6 A front view showing the structure and connections of the lifting mechanism's sliding beam, balance beam, and guide frame; Figure 7 for Figure 6 Sectional view along axis AA; Figure 8 A schematic diagram showing the structure and connection method of the movable top seat of the lifting mechanism; The numbers in the diagram are explained as follows: 1 Ground hinge, 2 Frame, 3 Hydraulic cylinder, 4 Sliding beam, 5 Movable top seat, 6 Balance beam, 7 Guide frame, 8 Standard support frame, 9 Top support frame, 10 End slope, 11 Conveyor belt, 12 Tail hinge, 14 Shaft clamp, 15 Center shaft hole, 16 Sleeve, 17 Pin, 18 Positioning pin, 19 Pin, 20 Slot. Detailed Implementation

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the following description is provided in conjunction with the accompanying drawings. Figures 1-8 The present invention will be further described in detail below with reference to specific embodiments.

[0021] This embodiment provides a lifting mechanism for a high-angle belt conveyor with variable angle, such as... Figure 1 As shown, the steep-angle belt conveyor is arranged across the end-face steps, transporting materials from below the steps to above them. The angle β of the end-face slope 10 changes continuously due to the ongoing open-pit mining. By adjusting the total length L of the lifting mechanism in this embodiment, the frame of the steep-angle belt conveyor rotates around its tail hinge 12, thereby changing the conveying angle to adapt to different end-face slope angles β. This embodiment is particularly suitable for open-pit mines where the end-face slope changes frequently and the conveying equipment angle needs to be adjusted quickly.

[0022] like Figure 2 As shown, the lifting mechanism for the large-angle belt conveyor provided in this embodiment mainly includes a ground hinge seat 1, a frame 2, a hydraulic cylinder 3, a sliding beam 4, a movable top seat 5, a balance beam 6, a guide frame 7, a standard support frame 8, and a top support frame 9.

[0023] The ground hinge 1 is fixedly mounted on the ground to anchor the entire lifting mechanism to the foundation. The lower end of the frame 2 is hinged to the ground hinge 1 via a hinge pin, allowing the frame 2 to rotate around the hinge point and automatically adapt to angular deflection when the total length of the lifting mechanism changes. The upper end of the frame 2 is used to connect to the standard support frame 8 and ultimately support the conveyor frame. A conveyor belt 11 is rotatably mounted on the frame 2.

[0024] Multiple standard support frames 8 are stacked vertically between the frame 2 and the top support frame 9. For example... Figure 2As shown, the standard support frame 8 is a truss steel structure with a rectangular cross-section. It boasts high structural strength and rigidity, capable of withstanding the vibration and impact loads generated during the operation of a belt conveyor at a large angle. The lower end of the top support frame 9 connects to the uppermost standard support frame 8, and the upper end of the top support frame 9 is equipped with a hinge hole, allowing it to be hinged to the conveyor frame via a hinge. Adjacent standard support frames 8, standard support frames 8 and the frame 2, and standard support frames 8 and the top support frame 9 are all detachably fixed connections, facilitating the addition or reduction of the number of standard support frames 8 as needed.

[0025] like Figure 5 As shown, the lower end of the guide frame 7 is fixedly mounted on the frame 2. The guide frame 7 has two guide posts extending vertically. Each of the two guide posts has a limiting block fixed at its upper end to limit the upward sliding position of the sliding beam 4. The sliding beam 4 has sleeve structures on both sides. Two sleeves are respectively fitted around the outer periphery of the two guide posts, and the inner wall of the sleeve is clearance-fitted with the outer wall of the guide post, allowing the sliding beam 4 to slide up and down along the axial direction of the guide post. A limiting block is preferably provided at the upper end of the guide post to prevent the sliding beam 4 from accidentally sliding out of the guide post.

[0026] like Figure 2 As shown, the lower end of the hydraulic cylinder 3 is hinged to the frame 2 or the ground hinge seat 1, and the upper end extension rod of the hydraulic cylinder 3 is hinged to the middle shaft hole 15 of the sliding beam 4 through a through pin 17. This through pin 17 is also hinged to the middle of the balance beam 6 to ensure synchronicity and stability during lifting. Preferably, there are two hydraulic cylinders 3, symmetrically arranged on the left and right sides of the lifting mechanism. The upper end extension rods of the two hydraulic cylinders 3 are simultaneously hinged to the sliding beam 4 and the balance beam 6 through the same through pin to ensure synchronicity and stability during lifting.

[0027] The balance beam 6 is positioned above the sliding beam 4, with an exposed retaining shaft 14 on each side. In this embodiment, the retaining shaft 14 is a cylindrical shaft. The movable top seat 5 is an independent component, such as... Figures 6-8 As shown, the upper part of the movable top seat 5 is connected to the side hole of the standard support frame 8 via a positioning pin 18, and the lower part of the movable top seat 5 is connected to the adjacent lower standard support frame 8 via double pins 19. A slot 20 is provided in the middle of the movable top seat 5, which is a U-shaped slot with the opening facing downwards. The cylindrical shafts 14 on both sides of the balance beam 6 are respectively inserted into the slots 20 of the two movable top seats 5, thereby realizing the temporary support and lifting of the movable top seat 5 and the connected standard support frame 8 by the balance beam 6.

[0028] When it is necessary to increase the total length L of the lifting mechanism, such as Figure 3As shown, the operation is performed in the following steps: First, the hydraulic cylinder 3 extends, and its extension rod lifts the sliding beam 4 and the balance beam 6 upwards. Since the retaining pin of the balance beam 6 is engaged in the retaining groove 20 of the movable top seat 5, and the movable top seat 5 is connected to the installed standard support frame 8 through the upper positioning pin 18, the installed standard support frame 8 is lifted upwards as a whole. Then, the hydraulic cylinder 3 continues to extend until the sliding beam 4, the balance beam 6, the installed standard support frame 8, and the top support frame 9 are raised by a distance H equal to the height of one standard support frame 8. Next, a standard support frame 8 to be installed is pushed from the side into the space that has been lifted out, and the upper end of the standard support frame 8 to be installed is connected to the lower end of the installed standard support frame 8. The lower end of the standard support frame 8 to be installed is connected to the upper end of the frame 2. At this time, the lifting mechanism is supported by all the installed standard support frames 8. Finally, the hydraulic cylinder 3 retracts back to its original position, preparing for the next extension adjustment. After the above series of actions are completed, the total length L of the lifting mechanism increases to L'. like Figure 5 As shown, as the total length L of the lifting mechanism increases, the conveyor frame is lifted upwards, and the conveying angle α increases accordingly to α'. Through this method, the number of standard support frames 8 can be gradually increased according to the changing requirements of the end slope angle β, thus achieving continuous adjustment of the total length of the lifting mechanism and the conveying angle.

[0029] When it is necessary to reduce the total length L of the lifting mechanism, the adjustment is performed in reverse order of the increase operation described above: the hydraulic cylinder 3 extends, lifting the sliding beam 4, the balance beam 6, and the installed standard support frame 8 upwards, loosening the connection between the lowest standard support frame 8 and the frame 2 and adjacent standard support frames 8, removing the standard support frame 8, and then the hydraulic cylinder 3 retracts back to its original position, connecting the remaining standard support frame 8 to the upper end of the frame 2. By removing one or more standard support frames 8, the total length of the lifting mechanism is reduced.

[0030] This embodiment uses a combination of standard support frames 8 and hydraulic cylinders 3 to construct the lifting mechanism of the steep-angle belt conveyor. The hydraulic cylinders 3 provide the lifting power to complete the lifting operation, while the standard support frames 8, with their truss steel structure, provide support after lifting. By increasing or decreasing the number of standard support frames 8, the total length of the lifting mechanism can be changed, thereby achieving variations in the conveying angle of the steep-angle belt conveyor. The standard support frames 8, made of truss steel, directly bear the supporting force after lifting. Facing the vibration and impact loads generated during the operation of the steep-angle belt conveyor, the steel structure offers higher rigidity and reliability, superior to the luffing method that relies solely on hydraulic cylinders for long-term pressure bearing. When a large range of angle changes is required, this embodiment can achieve this by increasing or decreasing the corresponding number of standard support frames 8, without being limited by the fixed stroke value of the hydraulic cylinders 3. The cylinders are only used for lifting operations, while the support is provided by the standard support frames; their functions are separate and do not interfere with each other. At the open-pit mine site, engineering machinery can be directly called upon to complete the installation and dismantling of the standard support frame 8 without the need for large hoisting equipment. The operation is simple and can be carried out on the spot. The support frame can be installed or removed while the hydraulic cylinder is in the lifting state, which eliminates the time consumption of redesigning and manufacturing the entire set of conveying equipment, greatly shortens the non-production downtime, and provides a strong guarantee for high-yield and efficient mining.

[0031] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A lifting mechanism for a belt conveyor with a large inclination angle, characterized in that, include: Ground hinge (1), fixed on the ground; The frame (2) is hinged at its lower end to the ground hinge seat (1) and supported at its upper end by a standard support frame (8). The standard support frame (8) is a truss steel structure. Multiple standard support frames (8) are detachably stacked in sequence between the frame (2) and the top support frame (9) in the vertical direction. The top support frame (9) is connected at its lower end to the uppermost standard support frame (8), and at its upper end is a hinge for hinged to the conveyor frame. Hydraulic cylinder (3), sliding beam (4), balance beam (6) and guide frame (7). The guide frame (7) is fixed on the frame (2) and extends in the vertical direction. The sliding beam (4) is sleeved on the guide frame (7) and can slide up and down along the guide frame (7). One end of the hydraulic cylinder (3) is hinged to the frame (2), and the other end is simultaneously hinged to the sliding beam (4) and the balance beam (6) via a pin (17). The balance beam (6) is located above the sliding beam (4). The balance beam (6) is provided with a movable top seat (5). The movable top seat (5) is provided with a slot (20). The movable top seat (5) is detachably connected to the standard support frame (8) through the slot (20). When the hydraulic cylinder (3) extends, it can drive the sliding beam (4) and the balance beam (6) to slide upward along the guide frame (7), and then lift the standard support frame (8) to be installed or removed through the movable top seat (5), so as to complete the detachable connection or separation between the standard support frame (8) and the adjacent standard support frame (8), the frame (2) or the top support frame (9) in the lifted state, thereby realizing the adjustment of the total length of the lifting mechanism.

2. The lifting mechanism for a high-angle belt conveyor according to claim 1, characterized in that, The slot (20) opened on the movable top seat (5) is a U-shaped slot with the opening facing downwards. The balance beam (6) is provided with a retaining shaft (14) on both sides, and the retaining shaft (14) is engaged in the slot (20).

3. The lifting mechanism for a large-angle belt conveyor according to claim 1, characterized in that, The upper part of the movable top seat (5) is inserted into the side hole of the standard support frame (8) by a positioning pin (18), and the lower part of the movable top seat (5) is inserted into the corresponding hole of the adjacent lower standard support frame (8) or the frame (2) by double pins (19).

4. The lifting mechanism for a large-angle belt conveyor according to claim 1, characterized in that, The sliding beam (4) has sleeve structures on both sides. The two sleeves (16) are respectively sleeved on the two guide posts of the guide frame (7). The sleeves (16) and the guide posts are in clearance fit so that the sliding beam (4) can slide up and down along the axial direction of the guide posts.

5. The lifting mechanism for a high-angle belt conveyor according to claim 1, characterized in that, The standard support frame (8) is a rectangular cross-section truss steel structure, and the connecting lugs between two adjacent standard support frames (8) are connected by bolts.

6. The lifting mechanism for a high-angle belt conveyor according to claim 1, characterized in that, The height H of the standard support frame (8) is a fixed value, and the maximum single extension distance of the hydraulic cylinder (3) is equal to or greater than the height H, so as to provide operating space for the insertion or removal of a single standard support frame (8).

7. The lifting mechanism for a high-angle belt conveyor according to claim 1, characterized in that, The number of hydraulic cylinders (3) is two. The two hydraulic cylinders (3) are symmetrically arranged on the left and right sides of the lifting mechanism. The upper extension rods of the two hydraulic cylinders (3) are simultaneously hinged to the middle of the sliding beam (4) and the middle of the balance beam (6) through the same through pin (17).

8. The lifting mechanism for a large-angle belt conveyor according to any one of claims 1 to 7, characterized in that, When it is necessary to increase the total length of the lifting mechanism, the hydraulic cylinder (3) extends and lifts the sliding beam (4) and the balance beam (6) to a height H of a standard support frame (8). The standard support frame (8) to be installed is then installed between the frame (2) and the installed standard support frame (8), so that the lower end of the standard support frame (8) to be installed is connected to the upper end of the frame (2) and the upper end is connected to the lower end of the installed standard support frame (8). The standard support frame (8) to be installed is temporarily supported by the movable top seat (5). Then the hydraulic cylinder (3) retracts and resets.

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