Large inclination belt with bucket belt excess material falling device

Abstract

The present application relates to material conveying equipment field, disclose a kind of big inclination belt bucket belt excess material shake-off device, including vibration roller and transmission part, vibration roller is rotatably installed in big inclination belt bucket belt body return section one side, its roll face is equipped with multiple knock stick arranged at interval along circumference;Transmission part is connected with vibration roller transmission, for driving vibration roller rotation along with the same direction of return section operating direction.In the operation of big inclination belt bucket belt body, the linear velocity of vibration roller is greater than the operating speed of big inclination belt bucket belt body, so that multiple knock stick is in contact after instantaneous disengagement from the surface of belt, form intermittent patting action, thereby shake off residual material in hopper.The present application utilizes the instantaneous disengagement action generated by vibration roller linear velocity greater than belt speed, both cooperatively form high-frequency pulse vibration, simultaneously transmit vibration to hopper, can effectively remove adhering material in belt bucket belt hopper and on belt, avoid belt deviation and wear, without secondary pollution.

Description

Technical Field

[0001] This invention relates to the field of material conveying equipment technology, specifically to a large-angle belt conveyor with bucket for dislodging residual material. Background Technology

[0002] In the production and conveying of powdery and granular materials such as gypsum, bucket belt conveyors, also known as steep-angle sidewall belt conveyors, are commonly used to meet the process requirements of steep-angle lifting. These conveyors have horizontally arranged buckets on the belt, which carry materials to complete the steep-angle upward conveying.

[0003] In actual production, the raw gypsum conveyed contains a certain amount of moisture and has strong adhesive properties. At the unloading point, some material adheres to the inside of the hopper and cannot be completely unloaded to the next stage of the conveyor system under gravity. This residual material returns with the belt on the return trip, and is scattered and spilled along the way due to equipment vibration and other factors, causing a large accumulation of material under the conveyor and on the return path. When the accumulated material comes into direct contact with the idlers on the return trip, the actual support point of the idlers shifts, disrupting the force balance of the belt on the idlers and generating a lateral thrust component along the idler axis. This pushes the belt away from its preset running centerline, resulting in belt misalignment. After belt misalignment, its edges experience continuous non-designed contact friction with the frame or the ends of the idlers, accelerating wear on the belt edges, shortening the service life of the conveyor belt, and increasing equipment maintenance costs.

[0004] To address the aforementioned material adhesion problem, existing technologies often involve adding fixed scrapers or high-pressure water flushing devices. However, for steeply inclined belt conveyors with buckets, the buckets are transverse baffle structures protruding from the belt surface. Fixed scrapers can only clean the surface of the belt and cannot reach the inside of the buckets. If high-pressure water flushing is used, the gypsum will undergo a hydration reaction upon contact with water, forming a hardened substance with higher bonding strength. This not only fails to clean the material but also exacerbates material clumping and accelerates equipment corrosion. Furthermore, the wastewater generated during flushing requires complex collection and harmless treatment, significantly increasing environmental costs and creating safety hazards due to the slippery environment.

[0005] Therefore, there is an urgent need for a large-angle belt conveyor residual material shaker that can effectively remove residual material from the hopper of the belt conveyor during use without damaging the belt or causing secondary pollution. Summary of the Invention

[0006] The purpose of this invention is to provide a large-angle belt conveyor with residual material shaking device to solve the technical problems in the prior art, such as material spillage along the way, belt misalignment and wear, and secondary pollution caused by water washing, due to the inability to remove material adhering to the hopper.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution:

[0008] A device for shaking off excess material from a bucket belt at a large angle includes a fixed frame, a vibrating roller, and a transmission component;

[0009] The fixing frame is a rigid frame structure, which is fixedly installed on one side of the return section of the large-angle bucket belt body.

[0010] The vibrating roller is rotatably mounted on the fixed frame via a bearing seat. Its axis is parallel to the width direction of the belt and is located on one side of the lower surface of the return section of the large-angle belt bucket body. Multiple striking rods are fixedly arranged at intervals along the circumferential direction on the roller surface of the vibrating roller.

[0011] The transmission component is connected to the vibrating roller and is used to drive the vibrating roller to rotate in the same direction as the return section.

[0012] The transmission component is configured such that the linear velocity of the vibrating roller is greater than the running speed of the large-angle bucket belt body, so that multiple striking rods disengage instantaneously after contacting the belt surface, forming an intermittent slapping action, thereby generating vibration and transmitting it to the hopper to shake off residual material in the hopper.

[0013] Furthermore, the number of the striking rods is 12, which are evenly distributed on the outer circumference of the vibrating roller and are connected to the roller surface of the vibrating roller by bolt fixing.

[0014] Furthermore, the fixing frame is provided with an adjustment groove extending in the vertical direction. The adjustment groove is oblong, and its two ends in the length direction are semi-circular arcs.

[0015] The two ends of the vibrating roller are installed in the adjustment groove by adjusting nuts. The vibrating roller can be adjusted up and down along the adjustment groove to adjust the distance between the axis of the vibrating roller and the surface of the belt.

[0016] Furthermore, the striking bar presses the belt down a preset distance of 5-10mm to create a pre-tension force between the striking bar and the belt.

[0017] Furthermore, the transmission component includes a transmission motor and a transmission belt;

[0018] The drive motor is fixedly installed on one side of the fixed frame, and the drive motor and the vibrating roller are respectively provided with drive pulleys, and the drive belt is wound around the two drive pulleys.

[0019] Furthermore, the transmission belt is a synchronous toothed belt, and the transmission pulleys are all synchronous pulleys that cooperate with the synchronous toothed belt.

[0020] Furthermore, the large-angle belt bucket residual material shake-off device also includes a gas purging system, which is located downstream of the vibrating roller and is used to spray compressed gas onto the belt surface to blow away the residual material loosened by the beating bar from the belt.

[0021] Furthermore, the gas purging system includes a mounting frame and a compressed air source. An air supply line is connected to the mounting frame. One end of the air supply line is connected to the compressed air source, and the other end is connected to a nozzle. The nozzle is fixedly installed on the mounting frame, and its spray direction is towards the belt surface of the return section of the large-angle bucket belt body.

[0022] Furthermore, the gas supply pipeline is equipped with a solenoid valve, the control end of which is electrically connected to the main control system of the large-angle bucket belt body, and is used to control the on / off of compressed gas and the timing of injection.

[0023] Furthermore, the nozzle is a flat air knife nozzle, and the angle between its spray direction and the belt surface is 30°-75°.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] This invention establishes pre-tension by pressing the belt down a predetermined distance with a striking rod, and utilizes the instantaneous release action generated by the vibrating roller's linear speed exceeding the belt speed. These two elements work together to create high-frequency pulse vibration, which is transmitted to the hopper, causing adhering residual material to detach due to inertia, thus effectively shaking off the adhering material. This process does not require contact with the hopper's interior, does not damage the belt, and eliminates the need for water rinsing, avoiding material hydration and clumping, and preventing wastewater generation. Simultaneously, the striking rod pressing the belt down a predetermined distance ensures appropriate striking force, effectively cleaning without damaging the belt. Attached Figure Description

[0026] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of a large-angle belt conveyor with bucket and belt material shake-off device provided in an embodiment of this application.

[0028] Figure 2 This is a schematic diagram of the structure of the vibrating roller in a large-angle belt conveyor for removing excess material from a bucket, as provided in an embodiment of this application.

[0029] Figure 3This is a schematic diagram of the striking bar in a large-angle belt conveyor with bucket and belt material shaker provided in an embodiment of this application.

[0030] Figure 4 This is a schematic diagram of the adjusting groove in a large-angle belt conveyor with bucket and belt material shake-off device provided in an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the mounting frame in a large-angle belt conveyor with bucket and belt material shake-off device provided in an embodiment of this application.

[0032] Figure 6 This is a schematic diagram of the overall structure of the nozzle, air supply pipeline and solenoid valve in a large-angle belt conveyor for shaking off excess material, provided in an embodiment of this application.

[0033] Figure 7 This is a schematic diagram of the nozzle structure in a large-angle belt conveyor with bucket and belt material shake-off device provided in an embodiment of this application.

[0034] The reference numerals in the figure are as follows:

[0035] 1-Fixed frame; 2-Vibrating roller; 3-Drive motor; 4-Large angle bucket belt body; 5-Drive belt; 6-Drive pulley; 7-Mounting frame;

[0036] 101 - Adjustment groove;

[0037] 201 - Tapping rod; 202 - Adjusting nut;

[0038] 701 - Nozzle; 702 - Air supply line; 703 - Solenoid valve. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0040] like Figures 1-7 As shown, the present invention provides a large-angle belt bucket residual material shake-off device, which includes a fixed frame 1, a vibrating roller 2 and a transmission component.

[0041] The fixing frame 1 is a rigid frame structure, welded from steel profiles, possessing sufficient structural strength and vibration resistance. The fixing frame 1 is fixedly installed on one side of the return section of the large-angle bucket belt body 4, specifically below the lower surface of the belt and near the return start area after the belt unloading end. In this embodiment, the fixing frame 1 is fixedly connected to the foundation platform via anchor bolts to ensure no displacement or shaking occurs during operation.

[0042] The vibrating roller 2 is rotatably mounted on the fixed frame 1 via a bearing seat and is located on one side of the lower surface of the return section of the large-angle bucket belt body 4. The axial direction of the vibrating roller 2 is parallel to the width direction of the belt and perpendicular to the belt running direction. Multiple striking rods 201 arranged at intervals along the circumferential direction are fixed on the roller surface of the vibrating roller 2.

[0043] In this embodiment, there are 12 striking rods 201, evenly distributed on the outer circumference of the vibrating roller 2, with the included angle between the centers of adjacent striking rods 201 being 30°. The striking rods 201 are made of wear-resistant rubber material, and their tips have arc-shaped contact surfaces to reduce impact stress on the belt surface and prevent scratches or excessive localized wear. The striking rods 201 are connected to the roller surface of the vibrating roller 2 by bolts or vulcanization to ensure they do not loosen or fall off under high-frequency vibration conditions.

[0044] The transmission component is connected to the vibrating roller 2 and drives the vibrating roller 2 to rotate in the same direction as the return section. Specifically, the transmission component includes a transmission motor 3 and a transmission belt 5. The transmission motor 3 is fixedly installed on one side of the fixed frame 1, and its output shaft is provided with a drive transmission pulley 6. One end of the vibrating roller 2 is provided with a driven transmission pulley 6. The transmission belt 5 is wound around the two transmission pulleys 6 to realize power transmission. In this embodiment, the transmission belt 5 is a synchronous toothed belt, and the transmission pulleys 6 are all synchronous pulleys that cooperate with the synchronous toothed belt to ensure that there is a precise synchronous transmission ratio between the vibrating roller 2 and the transmission motor 3, avoid slippage that causes fluctuations in linear velocity, and thus ensure the stability and consistency of the beating frequency.

[0045] The transmission component is configured such that the linear velocity of the vibrating roller 2 is greater than the running speed of the large-angle bucket belt body 4.

[0046] The specific implementation method is as follows: by selecting the rotational speed of the drive motor 3 and the tooth ratio between the active drive pulley 6 and the driven drive pulley 6, the outer circumferential linear velocity of the vibrating roller 2 is made 1.2 to 1.8 times the running speed of the large-angle bucket belt body 4. Under this speed difference condition, when the striking rod 201 rotates with the vibrating roller 2 to contact the lower surface of the belt, because the linear velocity of the vibrating roller 2 is greater than the belt speed, the striking rod 201 will have a relative sliding tendency at the moment of contact with the belt, and will separate from the belt surface in a very short time after contact, forming an intermittent striking action of contact-separation-re-contact.

[0047] The impact force generated by the aforementioned striking action is transmitted through the belt body to the hopper fixed to the belt, causing the hopper and the residual material adhering to it to vibrate at high frequency and micro-amplitude. Since the adhesion between the material and the inner wall of the hopper is limited, under the action of this high-frequency pulse vibration, the inertial force of the adhering material overcomes the adhesion force, thus detaching from the inner wall of the hopper and falling off, achieving the purpose of shaking off and cleaning. At the same time, because the contact between the striking rod 201 and the belt is instantaneous rather than continuous sliding friction, it will not cause excessive wear or heat damage to the belt surface.

[0048] In this embodiment, to further optimize the striking force and vibration transmission efficiency, the fixing frame 1 is provided with an adjustment groove 101 extending vertically. The bearing seats at both ends of the vibrating roller 2 are installed in the adjustment groove 101 via adjusting nuts 202. The vibrating roller 2 is adjustable up and down along the adjustment groove 101, thereby adjusting the distance between the axis of the vibrating roller 2 and the belt surface. The adjustment groove 101 is oblong, with semi-circular arcs at both ends along its length. The adjusting nut 202 has a double-nut locking structure to prevent loosening under vibration conditions.

[0049] During actual installation and commissioning, the operator can adjust the vibrating roller 2 to a suitable height by adjusting the nut 202 according to the belt tension and hopper size, so that the striking rod 201 presses the belt down a preset distance when it rotates to its highest position. In this embodiment, the preset distance is 5-10mm. This pressing distance ensures that a moderate preload is formed between the striking rod 201 and the belt, which guarantees sufficient impact energy for each strike to effectively dislodge residual material, while avoiding excessive belt deformation or damage caused by excessive impact force from the striking rod 201 on the belt due to excessive pressing.

[0050] Figures 4 to 6 The large-angle belt bucket residual material shaker also includes a gas purging system. This gas purging system is located downstream of the vibrating roller 2 (i.e., along the return section of the belt running direction, located after the vibrating roller 2) and is used to spray compressed gas onto the belt surface to blow away the residual material loosened by the striking rod 201 from the belt.

[0051] Specifically, the gas purging system includes a mounting frame 7 and a compressed air source. The mounting frame 7 is fixedly installed on one side of the return section of the steep-angle bucket belt body 4, located downstream of the vibrating roller 2. An air supply pipe 702 is connected to the mounting frame 7, one end of which is connected to the compressed air source, and the other end is connected to a nozzle 701. The nozzle 701 is fixedly installed on the mounting frame 7, and its spray direction is towards the belt surface of the return section of the steep-angle bucket belt body 4. The vertical distance between the nozzle 701 and the belt surface is 50-150mm to ensure that the compressed gas impacts the belt surface with sufficient kinetic energy, blowing off residual material that has been loosened by vibration but still adheres to or remains on the belt surface and the edge of the hopper opening.

[0052] Furthermore, the air supply pipeline 702 is equipped with a solenoid valve 703. The control end of the solenoid valve 703 is electrically connected to the main control system of the large-angle bucket belt body 4, and is used to control the on / off state and injection timing of compressed gas. The main control system can automatically control the opening and closing of the solenoid valve 703 according to the belt running status (such as start, run, stop) or a preset time interval, to realize automated control of gas purging. For example, during belt operation, the main control system can control the solenoid valve 703 to work intermittently, that is, to pause for 5 seconds every 10 seconds of operation, in order to save compressed gas consumption; or automatically delay closing the purging after the belt stops running, in order to remove residual material.

[0053] By setting up a gas purging system, the residual material loosened by the vibrating roller 2 can be further removed from the belt surface and the edge of the hopper, preventing the material from being spilled again in the subsequent path of the return section, and further improving the thoroughness and reliability of the cleaning.

[0054] Combination Figure 1 and Figure 7 Regarding the overall working process and principle of this invention: During normal operation of the inclined bucket belt body 4, the material is lifted and conveyed at a large angle through the bucket in the bearing section of the belt, and then discharged into the next stage equipment at the discharge end. Because the material (such as raw gypsum) contains a certain amount of moisture, some material will adhere to the inner wall of the bucket and the surface of the belt, and cannot be completely removed at the discharge point.

[0055] After the belt with residual material adheres to it enters the return section, it first passes through the area of ​​the vibrating roller 2 of the device of the present invention. The drive motor 3 drives the vibrating roller 2 to rotate in the same direction as the belt running in the return section through the drive belt 5, and the linear velocity of the vibrating roller 2 is greater than the belt running speed.

[0056] When one of the striking rods 201 on the vibrating roller 2 rotates to a position where it contacts the lower surface of the belt, the linear velocity of the vibrating roller 2 is greater than the belt velocity, causing the striking rod 201 to tend to slide relative to the belt at the moment of contact. However, due to the friction between the tip of the striking rod 201 and the belt, the belt is briefly pressed down by the striking rod 201 by a preset distance (5-10mm), resulting in elastic deformation and preload. Subsequently, as the vibrating roller 2 continues to rotate at high speed, the striking rod 201 quickly passes through the contact area, and the belt rebounds under its own elastic restoring force, causing the striking rod 201 to instantly disengage from the belt. This process is completed in a very short time, forming a pulse-like tapping.

[0057] Because 12 striking rods 201 are evenly distributed on the vibrating roller 2, and the linear velocity of the vibrating roller 2 is greater than the belt speed, each striking rod 201 contacts and disengages from the belt sequentially at a speed higher than the belt's running speed, generating continuous high-frequency pulse striking. This high-frequency pulse impact force is transmitted through the belt body to the hopper fixed above the belt, causing the hopper to generate high-frequency micro-amplitude vibration. Under the action of this vibration, the residual material adhering to the inner wall of the hopper overcomes the adhesion force under the action of inertial force, detaches from the inner wall of the hopper, and falls, completing the initial shaking and cleaning.

[0058] Subsequently, the belt continues to move forward, entering the effective area of ​​the gas purging system. Residual material that has loosened due to vibration but still adheres to the belt surface or hopper edge is further blown away from the belt surface by the high-speed compressed airflow ejected from nozzle 701. Because nozzle 701 is a flat air knife nozzle, the airflow curtain covers the entire width of the belt, and the spray direction forms a 45° angle with the belt surface, effectively blowing residual material along the belt's running direction into the collection device.

[0059] After the above two-stage cleaning, the residual material in the belt and hopper is completely removed, and the return belt no longer carries residual material, thus preventing material spillage along the return journey. Since the idler rollers on the return section no longer come into contact with the accumulated material, the support points of the idler rollers remain stable, and the belt will not shift laterally due to unbalanced forces, effectively preventing belt misalignment and edge wear problems.

[0060] This invention establishes pre-tension by pressing the belt down a preset distance using a striking rod 201, and utilizes the instantaneous detachment action generated by the linear velocity of the vibrating roller 2 being greater than the belt speed. The two work together to create high-frequency pulse vibration, which is transmitted to the hopper, causing the adhered residual material to detach due to inertia, thus effectively shaking off the adhering material. This process does not require contact with the inside of the hopper, does not damage the belt, and does not require water rinsing, avoiding the problem of material (especially gypsum) reacting with water and causing agglomeration. It also does not generate wastewater requiring treatment, demonstrating significant environmental friendliness and operational reliability.

[0061] Meanwhile, the striking rods 201 press the belt down a preset distance of 5-10mm. This parameter range has been experimentally verified to ensure that the striking force is sufficient to effectively clean residual material without damaging the belt or hopper structure due to excessive impact. The linear speed of the vibrating roller 2 is set to 1.2-1.8 times the belt speed. Combined with the even distribution of the 12 striking rods 201, a high-frequency striking effect of dozens of times per second can be achieved, ensuring the high efficiency and continuity of the cleaning effect.

[0062] In addition, the gas purging system, as a supplementary cleaning method, can completely blow away residual materials loosened by vibration and tapping, further improving the thoroughness of the cleaning. The linkage control between the solenoid valve 703 and the main control system allows the purging action to be automatically adjusted according to the actual operating conditions, saving energy consumption while ensuring the cleaning effect.

[0063] It is understood that the number of striking rods 201 is not limited to 12. In other embodiments, it can also be set to 8, 10, or 16, as long as the requirements of uniform distribution and striking frequency are met. The material of the striking rods 201 can also be made of wear-resistant and elastic materials such as polyurethane or nylon to replace rubber.

[0064] The form of the transmission component is not limited to the combination of the transmission motor 3 and the transmission belt 5. In other embodiments, chain drive, gear drive, or direct connection to the geared motor via the transmission shaft can also be used, as long as it can drive the vibrating roller 2 to rotate at a linear speed greater than the belt speed.

[0065] The nozzle 701 of the gas purging system is not limited to a flat air knife nozzle. In other embodiments, multiple circular nozzle arrays can be arranged to cover the width direction of the belt, which can also achieve the purging and cleaning function.

[0066] Furthermore, this device is particularly suitable for conveying granular materials containing moisture and prone to adhesion, such as gypsum. Since the entire cleaning process does not require water rinsing, it completely avoids the problem of gypsum reacting with water to form hydrates, leading to clumping and increased weight, and also eliminates the generation of wastewater requiring treatment, demonstrating significant environmental friendliness and operational reliability.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. All such modifications or substitutions should be covered within the protection scope of this application, and should not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application. Therefore, the protection scope of this application should be determined by the protection scope of the claims.

Claims

1. A large-angle belt conveyor with bucket for discharging residual material, characterized in that, Includes a fixed frame (1), which is a rigid frame structure and is fixedly installed on one side of the return section of the large-angle bucket belt body (4); Vibrating roller (2), the vibrating roller (2) is rotatably mounted on the fixed frame (1) through the bearing seat, its axis is parallel to the width direction of the belt, and is located on the lower surface of the return section of the large angle belt bucket belt body (4). Multiple striking rods (201) are fixedly arranged along the circumferential direction on the roller surface of the vibrating roller (2). The transmission component is connected to the vibrating roller (2) for driving the vibrating roller (2) to rotate in the same direction as the return section. The transmission component is configured such that the linear velocity of the vibrating roller (2) is greater than the running speed of the large-angle bucket belt body (4), so that multiple striking rods (201) disengage instantaneously after contacting the belt surface, forming an intermittent slapping action, thereby generating vibration and transmitting it to the hopper to shake off the residual material in the hopper.

2. The large-angle belt conveyor with bucket and conveyor belt residual material shake-off device according to claim 1, characterized in that, The number of the striking rods (201) is 12, which are evenly distributed on the outer circumference of the vibrating roller (2) and are connected to the roller surface of the vibrating roller (2) by bolt fixing.

3. The large-angle belt conveyor with bucket for residual material removal device according to claim 1, characterized in that, The fixed frame (1) is provided with an adjustment groove (101) extending in the vertical direction. The adjustment groove (101) is oblong, and its two ends in the length direction are semi-circular arcs. The two ends of the vibrating roller (2) are installed in the adjusting groove (101) by adjusting nuts (202), and the vibrating roller (2) can be adjusted up and down along the adjusting groove (101) to adjust the distance between the axis of the vibrating roller (2) and the belt surface.

4. The large-angle belt conveyor with bucket for residual material removal device according to claim 3, characterized in that, The striking rod (201) presses the belt down a preset distance of 5-10mm to create a pre-tension force between the striking rod (201) and the belt.

5. The large-angle belt conveyor with bucket for residual material removal device according to claim 1, characterized in that, The transmission components include a transmission motor (3) and a transmission belt (5); The drive motor (3) is fixedly installed on one side of the fixed frame (1), and the output shaft of the drive motor (3) and the end of the vibrating roller (2) are respectively provided with drive pulleys (6), and the drive belt (5) is wound around the two drive pulleys (6) to form a belt drive connection.

6. The large-angle belt conveyor with bucket and residual material shakeout device according to claim 5, characterized in that, The transmission belt (5) is a synchronous toothed belt, and the transmission pulleys (6) are all synchronous pulleys that cooperate with the synchronous toothed belt.

7. A large-angle belt conveyor with bucket for residual material removal device according to claim 1, characterized in that, The large-angle belt bucket residual material shaker also includes a gas blowing system, which is set on the downstream side of the vibrating roller (2) and is used to spray compressed gas onto the belt surface to blow away the residual material loosened by the knocking bar (201) from the belt.

8. A large-angle belt conveyor with bucket for material discharge device according to claim 7, characterized in that, The gas purging system includes: a mounting frame (7) and a compressed air source. The mounting frame (7) is fixedly installed on one side of the return section of the large-angle bucket belt body (4), and an air supply line (702) is connected to the mounting frame (7). One end of the air supply line (702) is connected to the compressed air source, and the other end is connected to a nozzle (701). The nozzle (701) is fixedly installed on the mounting bracket (7), and its spraying direction is toward the belt surface of the return section of the large-angle bucket belt body (4).

9. A large-angle belt conveyor with bucket for dislodging residual material according to claim 8, characterized in that, The gas supply pipeline (702) is equipped with a solenoid valve (703). The control end of the solenoid valve (703) is electrically connected to the main control system of the large-angle bucket belt body (4) and is used to control the on / off of compressed gas and the timing of injection.

10. A large-angle belt conveyor with bucket for residual material removal device according to claim 8, characterized in that, The nozzle (701) is a flat air knife nozzle to form an airflow curtain covering the entire width of the belt, and the angle between its spray direction and the belt surface is 30°-75°.

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