Mine large inclination belt conveyor

Abstract

This invention discloses a high-angle belt conveyor for mining, relating to the technical field of mining material transportation equipment. The conveyor includes an upper conveying mechanism and a lower conveying mechanism arranged vertically. The upper conveying mechanism includes an upper conveyor frame, a transmission device mounted on the upper conveyor frame, an annular membrane driven by the transmission device, and a pressure sealing mechanism located inside the annular membrane. The pressure sealing mechanism extends along the conveying direction and forms a pneumatic chamber with the transmission device and the section covered by the annular membrane above the lower conveying mechanism. An air inlet and an air outlet communicating with the pneumatic chamber are provided on the outer side of the upper conveyor frame. A fan is installed on the outer side of the upper conveyor frame and is connected to the air inlet. By using a flexible annular membrane combined with the pneumatic pressure sealing mechanism, air pressure is used to actively deform the flexible membrane, tightly adhering to and wrapping the surface of the stacked material. This eliminates gaps formed by large particles, achieving overall wrapping and compression of the material, preventing the material from slipping along the lower conveyor's carrying belt.

Description

Technical Field

[0001] This invention relates to the field of mining material transportation equipment technology, specifically to a large-angle belt conveyor for mining. Background Technology

[0002] Belt conveyors are a crucial component of bulk material transportation systems. With increasing mining capacity and expanding mining areas, the vertical elevation differences in material transport are also increasing, placing higher demands on the safe operation of belt conveyors. Particularly under steeply inclined conveying conditions, materials are prone to slipping along the conveyor belt and being pulled along by gravity, affecting its safe operation. If a belt conveyor is arranged with its orientation slightly inclined to the slope, the material, upon contact with the upper supporting belt at the receiving point, will slide down the belt a certain distance due to its inertia and gravity. An angle exists between the material sliding perpendicular to the slope and the belt conveyor, potentially leading to material rolling off the belt and creating a safety hazard.

[0003] Existing steep-angle belt conveyors mostly transport materials by adding an additional conveyor belt above the one carrying the material below. The pressure applied by this conveyor belt exerts a downward restraining force on the material, preventing it from sliding down during steep-angle transport. However, this type of conveyor has strict requirements for the continuity and uniformity of the material flow. In the transportation of coarsely crushed materials in open-pit mines, due to the inconsistent particle size and significant differences in uniformity, traditional belt conveyors sometimes result in large particles supporting the upper conveyor belt, creating large gaps between the upper and lower belts. This allows smaller particles to move within these gaps, causing material to roll down the conveyor belt. This exacerbates the uneven material flow on the conveyor belt, affecting the application of pressure to the upper conveyor belt and the overall safety of the system. To address this, we propose a steep-angle belt conveyor for mining using a flexible membrane pressurization system. This ensures the upper pressurization structure effectively encloses the material, achieving reliable pressurization and preventing material slippage. Summary of the Invention

[0004] This invention provides a large-angle belt conveyor for mining, which solves the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a mining inclined belt conveyor, comprising an upper conveying mechanism and a lower conveying mechanism arranged vertically, wherein the upper conveying mechanism comprises an upper conveyor frame, a transmission device installed on the upper conveyor frame, an annular diaphragm driven by the transmission device, and a pressure sealing mechanism disposed on the inner side of the annular diaphragm; The pressurized sealing mechanism extends along the conveying direction and forms a wind pressure chamber with the section above the transmission device and the lower conveying mechanism covered by the annular membrane; The outer side of the upper conveyor frame is provided with an air inlet and an air outlet that are connected to the air pressure chamber; A fan is installed on the outside of the upper conveyor frame. The fan is connected to the air inlet. The fan is used to blow air into the air pressure chamber to form positive pressure. This positive pressure acts downward on the annular membrane, causing the annular membrane to deform downward, thus wrapping and compressing the material placed on the lower conveyor mechanism. A pressure relief valve is installed on the outside of the upper conveyor frame, and the pressure relief valve is connected to the air outlet.

[0006] Preferably, the transmission device includes a chain, chain plate, sprocket, connector, and drive shaft; The upper conveyor frame is rotatably connected to both ends of a drive shaft. The sprockets are respectively installed at both ends of the drive shaft, and a chain meshes between the two sprockets. The connecting pieces are respectively installed at both ends of the inner side of the chain plate. The chain plate is fixedly connected to the chain through the connecting pieces. The two sides of the annular membrane are fixedly connected to the chain plate.

[0007] Preferably, the pressure sealing mechanism includes a sealing chamber, an annular sealing strip, and sealing ribs; The sealed chamber is installed on the inner wall of the upper conveyor frame. The bottom of the sealed chamber is provided with an air pressure groove, and the air inlet and air outlet are connected to the interior of the sealed chamber. The bottom of the air pressure groove is provided with a sealing rubber ring, and the sealing rubber ring is in sliding sealing contact with the inner side of the chain plate. The annular sealing strip is fixedly connected to both ends of the inner side of the chain plate. The sealing rib can undergo flexible deformation and is located in the gap between the chain plates. It is fixedly connected to the annular sealing strip, the annular membrane, and the inner wall of the gap between the chain plates. The annular sealing strip is in sliding sealing contact with the sealing chamber.

[0008] Preferably, the chain plate is provided with multiple pressurizing holes, and the length of the air pressure groove covers all the pressurizing holes on the chain plate covering the section above the lower conveyor mechanism; The positive pressure air in the sealed chamber acts on the annular membrane in sequence through the air pressure groove and the pressurization hole.

[0009] Preferably, stop plates are installed at the bottom of both sides of the sealed chamber, and the two ends of the stop plates are arc-shaped; The inner side of the connector is provided with a stop groove. When the connector moves to the section covering the lower conveying mechanism, it can form a linear sliding connection with the stop plate.

[0010] Preferably, the lower conveying mechanism includes a lower conveyor frame, a lower conveyor roller group rotatably mounted on the lower conveyor frame, and a lower conveyor belt running around the lower conveyor roller group; A support frame is installed at the bottom of the lower conveyor frame, which is used to support the lower conveyor frame.

[0011] Preferably, a motor is installed on the outside of the upper conveyor frame, and the output shaft of the motor is connected to the transmission shaft through a coupling.

[0012] Preferably, a support column is installed at the bottom of the upper conveyor frame, and the bottom end of the support column is installed above the lower conveyor frame; The supporting column is a self-expanding column, used to change the distance between the annular membrane and the conveyor belt.

[0013] Preferably, an upper limit cover plate is installed on the top of the upper conveyor frame. The upper limit cover plate is located on the top of the sealed chamber, and an oil outlet hole is provided on the side of the upper limit cover plate near the annular membrane. The oil outlet hole is connected to a lubricating oil supply system.

[0014] Preferably, the supporting column is a self-expanding column, and it is equipped with a cylinder drive assembly inside for extending and retracting along the length direction.

[0015] The present invention has the following beneficial effects: 1. This mine-use steep-angle belt conveyor uses a flexible annular membrane instead of the traditional rigid or semi-rigid upper conveyor belt. Combined with a pneumatic pressure sealing mechanism, the flexible membrane is actively deformed by air pressure, tightly adhering to and wrapping the surface of materials of different particle sizes and irregular shapes. This eliminates the gaps formed by the support of large particles, achieving overall and uniform wrapping and compression of the materials. This significantly increases the normal pressure and contact friction between the material and the lower conveyor belt and annular membrane, solving the problem of material slippage, rolling, or even spillage caused by gravity during steep-angle transportation, and greatly improving transportation safety and reliability.

[0016] 2. This mining-grade steep-angle belt conveyor features a modular pressurized sealing chamber design and adjustable support columns, giving it excellent adaptability, maintainability, and controllability. The air pressure can be easily adjusted via the fan power and pressure relief valve to meet the pressure requirements of different material characteristics (such as particle size, humidity, and density) and different conveying angles and speeds. The adjustable distance between the upper and lower mechanisms can accommodate different material layer thicknesses and required clamping forces. The overall structural design is reasonable, facilitating installation, commissioning, and long-term operation and maintenance in complex mining environments. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the cross-sectional view of the lower conveyor frame connection of the present invention; Figure 3This is a schematic diagram of the cross-sectional view of the upper conveyor frame connection of the present invention; Figure 4 This is a schematic diagram of the structure of the conveyor frame connected in another direction according to the present invention; Figure 5 This is a schematic diagram of the structure connecting the upper conveyor frame of the present invention; Figure 6 This is a schematic diagram of the annular membrane connection structure of the present invention; Figure 7 This is a schematic diagram showing the structure of the sealed chamber of the present invention; Figure 8 This is a schematic diagram of the chain plate connection structure of the present invention; Figure 9 This is a schematic diagram of the sprocket connection structure of the present invention; Figure 10 This is a cross-sectional structural schematic diagram of the sealing chamber of the present invention; Figure 11 This is a schematic diagram of the connection between the chain plates of the present invention; Figure 12 This is a schematic diagram of the cross-section connecting the chain plates of the present invention; Figure 13 This is a schematic diagram of the operating cross-section of the upper and lower conveyor frames of the present invention.

[0018] In the diagram: 1. Lower conveyor frame; 11. Lower conveyor roller assembly; 12. Lower conveyor belt; 2. Upper conveyor frame; 21. Annular membrane; 22. Chain; 23. Chain plate; 231. Pressurization hole; 24. Sealing chamber; 241. Air pressure groove; 242. Stop plate; 25. Sprocket; 26. Annular sealing strip; 27. Connector; 271. Stop groove; 28. Drive shaft; 29. ​​Sealing rib; 3. Support frame; 4. Upper limit cover plate; 5. Support column; 6. Motor; 7. Fan; 8. Pressure relief valve. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1 to 13Mining inclined belt conveyors are mainly used in mines at steep inclines (e.g., greater than 14°, typically 16° to 25° or even higher) to safely and efficiently transport bulk materials such as raw coal. Their core design concept utilizes controllable positive air pressure to drive a flexible annular diaphragm to actively deform, tightly wrapping and compressing the material on the conveyor belt. This increases the positive pressure of the material on the lower conveyor belt, greatly increasing the friction between the material and the conveyor belt, effectively preventing the material from sliding or rolling down the inclined belt under gravity.

[0021] like Figures 1 to 12 As shown, the conveyor as a whole includes an upper conveying mechanism and a lower conveying mechanism arranged vertically. The lower conveying mechanism forms the basic platform for material carrying and conveying, while the upper conveying mechanism is superimposed on the lower conveying mechanism. Its main function is to provide downward wrapping and pressing force. The upper conveying mechanism includes an upper conveyor frame 2. The upper conveying mechanism can be arranged according to the specific application scenario and can be arranged in multiple sections to accommodate longer conveying lines. No specific limitation is made here. The upper conveyor frame 2 is the main frame of the upper conveying mechanism and is also made of sturdy steel. Its length is roughly matched with the conveying section that needs to be pressurized. The upper conveyor frame 2 includes a transmission device installed on the upper conveyor frame 2, an annular diaphragm 21 driven by the transmission device, and a pressure sealing mechanism set inside the annular diaphragm 21. The transmission device drives the annular membrane 21 in a cyclical manner and provides it with the necessary support and traction. The annular membrane 21 is a key flexible component of this invention. It is made of a high-strength, wear-resistant, tear-resistant composite material with excellent elasticity and flexibility. For example, high-strength nylon or polyester canvas can be used as the frame layer, covered with wear-resistant rubber or polyurethane coating, the thickness of which can be designed as needed. The width of the annular membrane 21 is typically slightly smaller than the effective width of the conveyor belt 12, but its effective coverage width should be sufficient to cover most of the material flow. Its "flexible" characteristics mean that it can remain flat or slightly loose when not subjected to external force, and when subjected to uniform pressure perpendicular to its surface, it can produce significant, compliant downward elastic deformation, thereby conforming to and wrapping around the uneven surface of the material pile below.

[0022] The pressurized sealing mechanism extends along the conveying direction and forms a pneumatic chamber with the transmission device and the section above the conveying mechanism covered by the annular membrane 21. Its core objective is to construct a relatively closed "pneumatic chamber" that can be filled with high-pressure air above the entire working section of the conveying belt 12 covered by the annular membrane 21 along the conveying direction. The outer side of the upper conveyor frame 2 is provided with an air inlet and an air outlet that are connected to the air pressure chamber; A blower 7 is installed on the outside of the upper conveyor frame 2. It is preferably a centrifugal blower or a Roots blower that can provide a stable high-pressure airflow. Its rated air pressure can be selected as needed. The blower 7 is connected to the air inlet. The blower 7 is used to blow air into the air pressure chamber to form positive pressure. This positive pressure acts downward on the annular membrane 21, causing the annular membrane 21 to deform downward, wrapping and compressing the material placed on the lower conveyor mechanism. A pressure relief valve 8 is installed on the outside of the upper conveyor frame 2. The pressure relief valve 8 is preferably an adjustable safety pressure relief valve, whose opening pressure can be set. The pressure relief valve 8 is connected to the air outlet. By adjusting the speed of the fan 7 (or the damper) and the set value of the pressure relief valve 8, a stable working pressure that meets process requirements can be precisely controlled inside the sealed chamber 24. When the pressure exceeds the set value, the pressure relief valve 8 will automatically open to release pressure, providing safety protection.

[0023] Furthermore, the transmission device includes a chain 22, a chain plate 23, a sprocket 25, a connector 27, and a drive shaft 28; At both ends of the upper conveyor frame 2 (corresponding to the start and end positions of the pressurization section), drive shafts 28 are rotatably connected via bearings. Each end of each drive shaft 28 has a sprocket 25 fixedly installed. The four sprockets 25 on the two drive shafts 28 (two at each end) are meshed and connected by two parallel closed chains 22. Thus, when one drive shaft 28 is driven to rotate, the entire chain drive system can be driven through the transmission of the sprockets 25 and the chains 22. Multiple chain plates 23 are fixedly and securely to the two parallel chains 22 at equal intervals via connectors 27. The chain plates 23 are rigid plates (such as steel plates) with a certain width and length, and their length direction is perpendicular to the conveying direction. The functions of the chain plates 23 are, firstly, to provide lateral support and attachment points for the annular membrane 21, and secondly, to form part of the lower sealing interface of the pressurization sealing mechanism.

[0024] Specifically, the two sides of the annular membrane 21 are fixedly connected to specific positions (e.g., sides or outer surfaces near the edges) of the chain plate 23 by clamping, gluing, vulcanizing, or bolting. Thus, when the chain 22 is driven, the chain plate 23 drives the annular membrane 21 to synchronously perform a closed-loop motion. The chain plate 23 primarily forms a supporting skeleton for the annular membrane 21; therefore, it can be a narrow, elongated structure or a perforated structure. The gap between the chain plates 23 can be adjusted according to the specific application scenario, creating a larger gap to reduce the number of components and lighten the load. Simultaneously, the chain plate 23 uses lighter materials or structural forms to reduce the running load. Furthermore, in practical applications, especially when using long conveyor belts, this conveying mechanism can be used in a multi-segment combination, with the circulation plane of the annular membrane 21 approximately parallel to the bearing surface of the lower conveyor belt 12.

[0025] Furthermore, the pressure sealing mechanism includes a sealing chamber 24, an annular sealing strip 26, and a sealing rib 29; The sealing chamber 24 is installed on the inner wall of the upper conveyor frame 2. The sealing chamber 24 is a long strip box structure that extends along the conveying direction and is installed on the inner side wall of the upper conveyor frame 2 (the inner side wall facing the annular membrane 21). It can be fixed by welding, bolting or integral casting. The cross-section of the sealed chamber 24 is roughly inverted "U" or rectangular, and its top is closed. A long strip-shaped air pressure groove 241 extending along the conveying direction is provided in the central area of ​​the bottom of the sealed chamber 24. The air pressure groove 241 is open, but this opening is not directly open. Instead, it forms a dynamic seal with the chain plate 23 running below through a carefully designed sealing structure. The width of the air pressure groove 241 is usually smaller than the width of the chain plate 23. Its length covers all the chain plates 23 in the pressurized section above the lower conveyor belt 12. The air inlet and outlet are connected to the interior of the sealed chamber 24. The bottom of the air pressure groove 241 (i.e., the area where the bottom opening of the sealed chamber 24 contacts the chain plate 23) is provided with a sealing ring (not shown separately in the figure, but can be regarded as part of the bottom of the air pressure groove 241). This sealing ring is usually made of wear-resistant rubber. Its lower surface maintains continuous sliding sealing contact with the inner side of the running chain plate 23. This is the first important longitudinal seal. To further enhance the sealing effect and prevent high-pressure air from leaking out in large quantities from the gaps between the chain plates 23 and from both sides of the chain plates 23, annular sealing strips 26 and sealing ribs 29 are also provided. The annular sealing strips 26 are ring-shaped rubber strips fixedly connected to both ends of the inner side of each chain plate 23 (i.e., the side area near the chain 22). When the chain plates 23 move under the sealing chamber 24, the surfaces of these annular sealing strips 26 form a sliding sealing contact with specific sealing surfaces (equipped with matching wear-resistant plates or coatings) on both sides of the bottom of the sealing chamber 24, forming a second sealing line. The sealing ribs 29 can undergo flexible deformation. The sealing ribs 29 are made of... The long strip-shaped seal made of flexible materials (such as silicone rubber and fluororubber) can have a trapezoidal, semi-circular, or other shape suitable for compression sealing. The sealing rib 29 is set and fixed within the gap formed by the sides of adjacent chain plates 23, the inner side of the annular membrane 21, the connector 27, and the sidewall of the annular sealing strip 26. More specifically, the sealing rib 29 can be pre-formed and then fixed on one side to the sidewall of the annular sealing strip 26 on the side of a chain plate 23 by adhesive, snap-fit, or mechanical pressing, and on the other side to the relevant components of the adjacent chain plate 23, thereby spanning and sealing the gap between the chain plates 23. Because the sealing rib 29 itself is flexible, it can adapt to the slight relative displacement and angular changes caused by changes in chain pitch and vibration during the operation of the chain plates 23, always maintaining an effective sealing state, thus forming a third sealing line.

[0026] With the cooperation of the above three sealing measures, when the chain plate 23 drives the annular membrane 21 through the area below the sealed chamber 24, a relatively closed "wind pressure chamber" is formed between the sealed chamber 24, the chain plate 23 (and the annular membrane 21 on it). Although there is a dynamic sliding interface, the leakage is controlled at a very low level, which is sufficient to maintain a positive pressure in the chamber that is significantly higher than the external atmospheric pressure.

[0027] Furthermore, the chain plate 23 is provided with multiple pressure holes 231. These pressure holes 231 are evenly distributed on the surface of the chain plate 23, and their total area is large enough to ensure that air can pass through smoothly. The length of the air pressure groove 241 covers all the pressure holes 231 on the chain plate 23 covering the section above the lower conveyor mechanism. The length and position of the air pressure groove 241 ensure that it can cover all the pressure holes 231 on the chain plate 23 in the pressure section. The positive pressure air inside the sealed chamber 24 acts on the annular membrane 21 through the air pressure groove 241 and the pressurization hole 231 in sequence. Therefore, the entire pressurization process is as follows: the blower 7 operates, establishing a stable positive pressure P within the sealed chamber 24. This high-pressure air escapes downwards through the air pressure groove 241 at the bottom of the sealed chamber 24. Since the air pressure groove 241 is directly opposite the pressurization holes 231 on the chain plate 23, the high-pressure air acts directly and uniformly on the inner surface of the annular membrane 21 located below the chain plate 23 through these pressurization holes 231.

[0028] Furthermore, stop plates 242 extending in the conveying direction are installed on both sides of the open opening at the bottom of the sealed chamber 24. The two ends of the stop plates 242 are arc-shaped to facilitate the smooth entry and exit of the chain plate 23 and its connecting parts 27 into and out of the sealed area. The inner side of the connector 27 is provided with a stop groove 271. When the connector 27 runs to the section covering the lower conveyor mechanism, it can form a linear sliding connection with the stop plate 242. The cooperation between the stop plate 242 and the stop groove 271 can ensure the stability of the chain plate during operation, prevent the chain plate from running off-center, and ensure the normal operation of the equipment.

[0029] Furthermore, the lower conveying mechanism includes a longitudinally elongated lower conveyor frame 1 made of welded or bolted sections of steel (such as channel steel or I-beams), a set of lower conveyor rollers 11 rotatably mounted on the lower conveyor frame 1, multiple sets of lower conveyor rollers 11 installed at certain intervals along the length of the lower conveyor frame 1, each set of lower conveyor rollers 11 typically consisting of three (trough-shaped) or more rollers arranged at a certain angle to support and guide the lower conveyor belt 12 to form a trough-shaped cross-section to increase the effective loading space, and the lower conveyor belt 12 running around the set of lower conveyor rollers 11. The lower conveyor belt 12 is an annular high-strength conveyor belt (usually a steel cord conveyor belt or a fabric core conveyor belt) that wraps around the head and tail drums of the conveyor and these sets of lower conveyor rollers 11. The lower conveyor belt 12 is driven by a drive drum (not shown in the figure, usually located at the head), and its drive system (including motor, reducer, brake, etc.) is conventional technology, which will not be described in detail here. The upper branch of the conveyor belt 12 carries the material and runs at a large angle; A support frame 3 is installed at the bottom of the lower conveyor frame 1. The support frame 3 is used to support the lower conveyor frame 1. The lower conveyor frame 1 is fixedly installed on the pre-constructed foundation or designed foundation by the support frame 3 at the bottom to ensure overall stability.

[0030] Furthermore, a motor 6 is mounted on the outer side of the upper conveyor frame 2. The output shaft of the motor 6 is connected to the transmission shaft 28 via a coupling, providing power to the entire upper conveying mechanism. Preferably, the motor 6 is a variable frequency motor for easy speed adjustment.

[0031] Furthermore, a support column 5 is installed at the bottom of the upper conveyor frame 2, and the bottom end of the support column 5 is installed above the lower conveyor frame 1. Crucially, the support columns 5 can be configured as self-retracting columns, such as hydraulic cylinders, pneumatic cylinders, or electric push rods, to change the spacing between the annular film 21 and the lower conveyor belt 12. By adjusting the extension length of these support columns 5, the vertical height of the entire upper conveying mechanism relative to the lower conveying mechanism can be precisely changed, thereby adjusting the initial spacing between the annular film 21 and the upper surface of the lower conveyor belt 12. This design allows the conveyor to adapt to material layers of different thicknesses (from thin to thick) and to adjust the required initial clamping space according to material characteristics (such as particle size and moisture content) and conveying angle.

[0032] Furthermore, an upper limit cover plate 4 is installed on the top of the upper conveyor frame 2. The upper limit cover plate 4 is located on the top of the sealed chamber 24, and an oil outlet is provided on the side of the upper limit cover plate 4 near the annular membrane 21. The oil outlet is connected to a lubricating oil supply system (such as an oil pump or oil distributor) to provide timed or continuous lubrication to the contact surface between the annular membrane 21 and the material. This is particularly important for ensuring the long-term reliable operation of the transmission device in the dusty environment of the mine.

[0033] Furthermore, the support column 5 is a self-retracting column, and it is equipped with a cylinder drive assembly inside for retracting along the length direction.

[0034] In summary, when using this inclined belt conveyor for mining, firstly, based on parameters such as the inclined angle, design capacity, and material characteristics, an initial distance H between the annular membrane 21 and the lower conveyor belt 12, as well as the target working pressure P of the sealed chamber 24, are preset. The distance H is set by adjusting the support column 5 (hydraulic cylinder or electric push rod). Then, the blower 7 is started, and its speed and pressure relief valve 8 are adjusted to stabilize the pressure inside the sealed chamber 24 at the value P. Finally, the lower and upper conveying mechanisms are started, causing the lower conveyor belt 12 and the annular membrane 21 to run at the set synchronous speed. After the material falls from the upper transfer point onto the lower conveyor belt 12, it quickly enters the pressurized zone covered by the annular membrane 21. The material is located between the lower conveyor belt 12 and the annular membrane 21. At this time, the uniform wind pressure P acting on the upper surface of the annular membrane 21 forces the flexible annular membrane 21 to undergo elastic deformation downward. Due to the flexibility of the annular membrane 21, it will not form gaps between the particles after being pushed up by large particles like a rigid plate. Instead, it can conform to every concave and convex contour formed by the particles of different sizes on the surface of the material pile, wrapping the entire material pile downward like a "flexible skin". The annular membrane 21 deforms, wraps and presses the material, providing sufficient frictional resistance to ensure that the material is transported stably and reliably at large inclination angles until it reaches the unloading point.

[0035] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Moreover, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A large inclination belt conveyor for mine, comprising an upper conveyor mechanism and a lower conveyor mechanism arranged in an upper and lower manner, characterized in that: The upper conveying mechanism includes an upper conveyor frame (2), a transmission device installed on the upper conveyor frame (2), an annular membrane (21) driven by the transmission device, and a pressure sealing mechanism disposed inside the annular membrane (21). The pressurized sealing mechanism extends along the conveying direction and forms a wind pressure chamber with the transmission device and the section above the conveying mechanism covered by the annular membrane (21); The upper conveyor frame (2) is provided with an air inlet and an air outlet on the outside that are connected to the air pressure chamber; A fan (7) is installed on the outside of the upper conveyor frame (2). The fan (7) is connected to the air inlet. The fan (7) is used to blow air into the air pressure chamber to form positive pressure. The positive pressure acts downward on the annular membrane (21), causing the annular membrane (21) to deform downward, wrapping and pressing the material placed on the lower conveyor mechanism. A pressure relief valve (8) is installed on the outside of the upper conveyor frame (2), and the pressure relief valve (8) is connected to the air outlet.

2. Large angle belt conveyor for mining according to claim 1, characterized in that: The transmission device includes a chain (22), a chain plate (23), a sprocket (25), a connector (27), and a drive shaft (28); The upper conveyor frame (2) is rotatably connected to both ends of a drive shaft (28). The sprockets (25) are respectively installed at both ends of the drive shaft (28). A chain (22) meshes between the two sprockets (25). The connectors (27) are respectively installed at both ends of the inner side of the chain plate (23). The chain plate (23) is fixedly connected to the chain (22) through the connectors (27). The two sides of the annular membrane (21) are fixedly connected to the chain plate (23).

3. Large angle belt conveyor for mining according to claim 2, characterized in that: The pressurized sealing mechanism includes a sealing chamber (24), an annular sealing strip (26), and a sealing rib (29). The sealed chamber (24) is installed on the inner wall of the upper conveyor frame (2). The bottom of the sealed chamber (24) is provided with an air pressure groove (241), and the air inlet and air outlet are connected to the interior of the sealed chamber (24). The bottom of the air pressure groove (241) is provided with a sealing ring, and the sealing ring is in sliding sealing contact with the inner side of the chain plate (23). The annular sealing strip (26) is fixedly connected to both ends of the inner side of the chain plate (23). The sealing rib (29) can produce flexible deformation and is located in the gap between the chain plates (23). It is fixedly connected to the annular sealing strip (26), the annular membrane (21), and the inner wall of the gap between the chain plates (23). The annular sealing strip (26) slides and seals against the sealing chamber (24).

4. Large angle belt conveyor for mining according to claim 3, characterized in that: The chain plate (23) is provided with multiple pressure holes (231), and the length of the air pressure groove (241) covers all the pressure holes (231) on the chain plate (23) covering the section above the lower conveyor mechanism. The positive pressure air in the sealed chamber (24) acts on the annular membrane (21) through the air pressure groove (241) and the pressurization hole (231) in sequence.

5. Large angle belt conveyor for mining according to claim 4, characterized in that: The bottom of both sides of the sealed chamber (24) is equipped with a stop plate (242), and the two ends of the stop plate (242) are arc-shaped. The inner side of the connecting piece (27) is provided with a stop groove (271), when the connecting piece (27) runs to the section covering the upper conveying mechanism, linear sliding connection relationship can be formed with the stop plate (242).

6. The large angle belt conveyor for mining use according to claim 5, characterized in that: The lower conveying mechanism comprises a lower conveying frame (1), a lower conveying roller set (11) rotatably arranged on the lower conveying frame (1), and a lower conveying belt (12) running around the lower conveying roller set (11). The bottom of the lower conveying frame (1) is provided with a support frame (3), which is used for supporting the lower conveying frame (1).

7. Large angle belt conveyor for mining according to claim 6, characterized in that: The outer side of the upper conveying frame (2) is provided with a motor (6), the output shaft of the motor (6) is connected with the transmission shaft (28) through a shaft coupling.

8. Large angle belt conveyor for mining according to claim 7, characterized in that: The bottom of the upper conveying frame (2) is provided with a support column (5), the bottom end of the support column (5) is arranged above the lower conveying frame (1). The support column (5) is a self-extending column, which is used for changing the distance between the annular film (21) and the lower conveying belt (12).

9. Large angle belt conveyor for mining according to claim 8, characterized in that: The top of the upper conveying frame (2) is provided with an upper limit cover plate (4), the upper limit cover plate (4) is arranged at the top of the sealed bin (24), and the side of the upper limit cover plate (4) close to the annular film (21) is provided with an oil outlet hole, and the oil outlet hole is connected with a lubricating oil supply system.

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