A magnetic adsorption type belt conveyor braking device

Abstract

The present invention provides a magnetic adsorption type belt conveyor braking device, including a frame for installation and fixing, a bottom plate arranged on the frame, an auxiliary roller arranged on the frame for supporting the belt, an upper clamping plate arranged on the frame above the auxiliary roller, a lower clamping plate arranged on the frame below the auxiliary roller, a magnetic seat arranged on the upper clamping plate, a driving component connected to the magnetic seat, a buffer spring arranged on the bottom plate and a control device, wherein the driving component rotates to drive the permanent magnet inside the magnetic seat to rotate, and the magnetic seat externally displays magnetic attraction to the lower clamping plate to move upward, and acts together with the upper clamping plate to brake the belt. The device adjusts the size of the magnetic force through the angular velocity of the motor to achieve constant deceleration braking, and is fully automated. When the device is arranged at the lower belt of the tail, it can generate a large braking force, is safe and reliable, and is particularly suitable for braking of large-angle belt conveyors, and can well solve the problems of belt running and flying of the lower belt conveyor caused by various reasons.

Description

Technical Field

[0001] The invention relates to the field of belt conveyor braking, and in particular to a magnetic adsorption type belt conveyor braking device. Background Art

[0002] With the development of the mining industry and the improvement of technology, belt conveyors have been developing in the direction of large-scale, environmental protection, and automation. In particular, large-capacity, high-power, and large-angle downward belt conveyors with energy-saving functions have become an important development direction. Downward belt conveyors are a conveying device that transports materials from high to low. Because they can make full use of terrain features and reduce equipment investment, they are increasingly used in underground mine tunnels, mine ground transportation systems, open-pit mines, and mineral processing plants. Downward belt conveyors have complex operating conditions and are prone to accidents such as slipping, spilling, and flying. They also face problems such as difficult starting and low braking safety.

[0003] There are two types of braking devices for down-carrying belt conveyors currently in use: one is a disc brake, and the other is a liquid viscous brake. When braking, the disc brake completely converts the kinetic energy of the belt conveyor into heat energy. If the braking time is too long, it is easy to cause the temperature of the brake disc to rise, causing gas explosions underground; although the liquid viscous brake overcomes the disadvantage that the temperature of the disc brake cannot be controlled, it requires electrical control, and its braking time cannot be automatically controlled under the condition of sudden power outage. There are the following technical problems in the existing technical solutions: some braking devices have large impacts, and the braking devices are mostly installed on the driving shaft of the belt conveyor to use friction for braking, which causes great damage to the device and cannot solve the problems of running belts and flying cars; some braking devices require manual reset, which is cumbersome to operate and has a low degree of automation; some braking devices only brake one side of the belt surface, cannot provide sufficient braking force, and the device layout is difficult, which is not suitable for braking of down-carrying belt conveyors with large inclination angles; some braking devices do not act in time, the braking force is uncontrollable, and it is easy to damage the belt.

[0004] Based on the applicant's technical briefing on October 29, 2021, the similar patent document CN102897490A obtained through retrieval and the existing technical problems, technical features and technical effects in the background technology, the technical application scheme of the present invention was made. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a magnetic adsorption type belt conveyor braking device, including a frame for installation and fixing, an auxiliary roller arranged on the frame for supporting the belt, an upper clamping plate arranged on the frame above the auxiliary roller, a lower clamping plate arranged on the frame below the auxiliary roller, a magnetic seat arranged on the upper clamping plate, and a driving component connected to the magnetic seat, wherein the frame is also provided with a bottom plate, the bottom plate is located below the lower clamping plate, and a buffer spring and a control device are arranged on the bottom plate; the driving component rotates to drive the permanent magnet inside the magnetic seat to rotate, and the magnetic seat externally displays magnetic attraction to the lower clamping plate to move upward, and acts together with the upper clamping plate to brake the belt. The magnetic force is regulated by controlling the angular velocity of the motor or pneumatic motor to achieve constant deceleration braking, which is fully automated and does not require manual assistance. When the device is arranged at the lower belt of the tail, it can generate a large braking force, is safe and reliable, and is particularly suitable for braking of large-angle belt conveyors, and can well solve the problems of belt running and flying of the lower belt conveyor caused by various reasons.

[0006] Furthermore, the drive assembly is connected to the permanent magnet of the magnetic base to control the rotation angle of the magnetic base knob. The relationship between the rotation angle of the magnetic base and the magnetic force is calculated through an algorithm, and the angular velocity of the drive assembly is dynamically adjusted to achieve constant deceleration braking of the tape.

[0007] Furthermore, the algorithm is F=μ0 / [4S(H / δ)^2], where F is the magnetic force generated by the permanent magnet, μ0 is the vacuum permeability, H is the magnetomotive force of the permanent magnet, S is the surface area of ​​the permanent magnet, and δ is the air gap.

[0008] Furthermore, a base plate is provided on the frame, and a buffer spring is fixed to each of the four corners of the base plate. A lower clamping plate is provided on the upper part of the buffer spring, and the size of the lower clamping plate is the same as that of the base plate. The frame is slidably connected to the lower clamping plate, and the lower clamping plate can move from state one position to state two position along the inner side of the four pillars of the frame under the action of magnetic force.

[0009] Furthermore, the support pillars of the rack are angle iron structures.

[0010] Furthermore, the upper clamping plate is fixedly arranged on the frame and is located above the lower adhesive tape. Magnetic seats are symmetrically arranged on both sides of the upper clamping plate, and a driving component is arranged on the permanent magnet; the driving component is a motor or a pneumatic motor.

[0011] Furthermore, the upper clamping plate and the lower clamping plate are covered with a rubber layer.

[0012] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0013] 1. The present invention adopts a direct braking belt method, which has a rapid and reliable response and solves the problem of difficult braking of the down-carrying chute belt conveyor.

[0014] 2. The present invention dynamically adjusts the speed of the DC motor or pneumatic motor through the control system to control the magnetic force of the permanent magnet magnetic seat on the clamping plate, thereby achieving constant deceleration braking of the belt.

[0015] 3. When the power supply of the drive component is cut off, the UPS starts working immediately, effectively braking the belt conveyor and effectively preventing the occurrence of dangerous working conditions such as runaway and running belt.

[0016] 4. The present invention only needs to control the rotation of the motor or pneumatic motor so that the magnetic base does not show magnetism to the outside, the lower clamping plate is reset under the action of gravity, and a buffer spring is provided to prevent the lower clamping plate from falling and damaging the equipment, and no manual reset is required.

[0017] 5. The present invention has a simple structure and is lightweight, and can be easily arranged on the frame of a belt conveyor. It is suitable for a variety of belt conveyors, especially for belt conveyors with large inclination angles, and overcomes the problem of limited arrangement of other braking devices.

[0018] 6. The sliding lower clamping plate used in the present invention is in surface contact with the adhesive tape, and can apply braking force on the full width of the adhesive tape. The load on the adhesive tape is uniform, and the adhesive tape can be effectively protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and other objects and advantages of the present invention will become more fully apparent from the following detailed description taken in conjunction with the accompanying drawings, wherein the same or similar elements are denoted by the same reference numerals.

[0020] Figure 1 It is a schematic diagram of the present invention when it is in state one.

[0021] Figure 2 It is a schematic diagram of the present invention when it is in state two.

[0022] Figure 3 It is a control flow chart of the present invention.

[0023] Explanation of reference numerals: 1-frame, 2-lower clamping plate, 3-auxiliary roller, 4-upper clamping plate, 6-magnetic seat, 7-driving assembly, 8-buffer spring, 9-lower tape. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with embodiments. The advantages and features of the present invention will become clearer as the description proceeds. However, these embodiments are exemplary only and do not constitute any limitation to the scope of the present invention. It should be understood by those skilled in the art that the details and forms of the technical solution of the present invention may be modified or replaced without departing from the spirit and scope of the present invention, but these modifications and replacements all fall within the protection scope of the present invention.

[0025] Terms such as “comprise” and “include” indicate that in addition to the components directly and explicitly stated in the specification and claims, the technical solution of the present invention does not exclude the situation where it has other components that are not directly or explicitly stated.

[0026] In the description of this article, directional terms such as "up", "down", "front" and "back" are used. It should be understood that these directional terms are relative concepts. They are used to describe and clarify relative positions, and their corresponding specific orientations may change accordingly according to the change of the orientation of the belt conveyor.

[0027] like Figure 1 and Figure 2 The magnetic adsorption type belt conveyor braking device shown in the figure includes a frame 1 for installation and fixing, a bottom plate arranged on the frame 1, an auxiliary roller 3 arranged on the frame 1 for supporting the belt, an upper clamping plate 4 arranged on the frame 1 above the auxiliary roller 3, a lower clamping plate 2 arranged on the frame 1 below the auxiliary roller 3, a magnetic seat 6 arranged on the upper clamping plate 4, a driving component 7 connected to the magnetic seat 6, and a buffer spring 8 arranged on the bottom plate. The driving component 7 rotates to drive the permanent magnet inside the magnetic seat 6 to rotate, and the magnetic seat 6 externally displays magnetic attraction to the lower clamping plate 2 to move upward, and acts together with the upper clamping plate 4 to brake the belt. The magnetic force is regulated by controlling the angular velocity of the motor or pneumatic motor to achieve constant deceleration braking, which is fully automated and does not require manual assistance. When the device is arranged at the lower belt of the tail of the machine, it can generate a large braking force, which is safe and reliable. It is especially suitable for braking of large-angle belt conveyors and can well solve the problems of belt running and flying of the lower belt conveyor caused by various reasons.

[0028] In this embodiment, the permanent magnet magnetic seat 6 is symmetrically fixed on both sides of the upper clamping plate 4, and the magnetic force is adjusted by rotating the angle of the built-in NdFeB permanent magnet. When the knob is turned from OFF to ON, the permanent magnet magnetomotive force changes accordingly, and the magnetic force changes from 0 to the maximum value. The drive assembly 7 is connected to the permanent magnet of the magnetic seat 6 to control the rotation angle of the knob of the magnetic seat 6. The relationship between the rotation angle and the magnetic force of the magnetic seat 6 is calculated by an algorithm, and the angular velocity of the drive assembly 7 is dynamically adjusted to achieve constant deceleration braking of the tape. The rotation angle of the magnetic seat 6 and the magnetic force generated by the permanent magnet can be calculated by the formula F=μ0 / [4S(H / δ)^2]. The rotation angle of the magnetic seat 6 is related to the surface area of ​​the permanent magnet, where: F is the magnetic force generated by the permanent magnet, μ0 is the vacuum magnetic permeability, H is the permanent magnet magnetomotive force, S is the surface area of ​​the permanent magnet, and δ is the air gap.

[0029] In this embodiment, a base plate is provided on the frame 1, and a buffer spring 8 is fixed to each of the four corners of the base plate. A lower clamping plate 2 is provided on the upper part of the buffer spring 8. The size of the lower clamping plate 2 is the same as that of the base plate. The technical purpose is: by controlling the rotation angle of the magnetic base 6, the magnetic base 6 does not show magnetism to the outside, the lower clamping plate 2 is reset under the action of gravity, and a buffer spring 8 is provided to prevent the lower clamping plate 2 from damaging the equipment after falling, and no manual reset is required.

[0030] In this embodiment, the frame 1 is slidably connected to the lower clamping plate 2, and the lower clamping plate 2 can move from the state 1 position to the state 2 position along the inner side of the four pillars of the frame 1 under the action of magnetic force. The upper clamping plate 4 and the lower clamping plate 2 are used to support the lower belt 9 to directly brake the belt, which has a rapid and reliable response and is conducive to solving the problem of difficult braking of the lower chute belt conveyor.

[0031] In this embodiment, the support of the frame 1 is an angle iron structure. Its technical purpose is to limit the lower clamping plate 2. The angle iron structure of the support of the frame 1 forms a slide groove, and the lower clamping plate 2 can only move vertically in the slide groove.

[0032] In this embodiment, the upper clamping plate 4 is fixedly arranged on the frame 1 and is located above the lower tape 9. The upper clamping plate 4 is symmetrically provided with magnetic seats 6 on both sides, and the permanent magnet is provided with a driving assembly 7. The driving assembly 7 is used as a motor or a pneumatic motor to control the rotation angle of the knob of the magnetic seat 6. By solving the relationship between the rotation angle of the magnetic seat 6 and the magnitude of the magnetic force, the angular velocity of the motor or the pneumatic motor is dynamically adjusted to achieve constant deceleration braking of the tape.

[0033] In this embodiment, the upper clamping plate 4 and the lower clamping plate 2 are covered with a rubber layer, the technical purpose of which is to increase the friction and increase the clamping force on the tape.

[0034] The control device is connected with an uninterruptible power supply, and the drive assembly 7 is electrically connected to the control device. The drive assembly is a DC motor or a pneumatic motor. In this embodiment, the drive assembly is a motor, the drive assembly is a DC motor or a pneumatic motor, and the drive assembly has a drive assembly power supply. The drive assembly is connected to the magnetic seat 6 through a connecting shaft. When the belt conveyor works normally, the permanent magnet NS level in the magnetic seat 6 is perpendicular to the bottom plate and does not show magnetism to the outside. The lower clamping plate 2 of the brake device is only under the action of gravity and is located on the buffer spring 8. The lower belt 9 of the belt conveyor moves between the upper and lower clamping plates 2 of the brake device; when the control system determines that the belt conveyor is flying, the DC motor or pneumatic motor is controlled to rotate to drive the permanent magnet inside the magnetic seat 6 to rotate, and the magnetic seat 6 shows magnetic attraction to the outside. The lower clamping plate 2 moves upward, and acts together with the fixed upper clamping plate 4 to brake the tape. When the control system detects that the power supply of the belt conveyor drive assembly is off, the UPS (uninterruptible power supply) drives the motor controller to brake the tape.

[0035] In this embodiment, the sliding lower clamping plate 2 is in surface contact with the tape, and the braking force can be applied to the full width of the tape. The load on the tape is uniform, and the tape can be effectively protected. The direct braking method of the tape has a quick and reliable response, which solves the problem of the difficulty of braking the lower chute belt conveyor. The control system dynamically adjusts the speed of the DC motor or pneumatic motor to control the magnetic force of the permanent magnet magnetic seat 6 on the clamping plate, thereby achieving constant deceleration braking of the tape. When the belt conveyor is powered off, the UPS starts working immediately, effectively brakes the belt conveyor and can effectively prevent the occurrence of dangerous working conditions such as flying and running belts. In this embodiment, it is only necessary to control the rotation of the motor or pneumatic motor so that the magnetic seat 6 does not show magnetism to the outside, the lower clamping plate 2 is reset under the action of gravity, and a buffer spring 8 is provided to prevent the lower clamping plate 2 from falling and damaging the equipment, and no manual reset is required. The structure is simple and the quality is light, and it can be easily arranged on the frame 1 of the belt conveyor. It is suitable for a variety of belt conveyors, especially for large-angle lower belt conveyors, and overcomes the problem of limited arrangement of other braking devices.

[0036] The implementation schemes in the above embodiments can be further combined or replaced, and the embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various changes and improvements made to the technical solutions of the present invention by professional and technical personnel in this field all belong to the protection scope of the present invention.

Claims

1. A magnetic adsorption belt conveyor brake device, comprising a frame for mounting and fixing, an auxiliary roller arranged on the frame for supporting the tape, an upper clamping plate arranged on the frame above the auxiliary roller, a lower clamping plate arranged on the frame below the auxiliary roller, a magnetic seat arranged on the upper clamping plate, and a driving assembly connected to the magnetic seat, characterized in that: The frame is also provided with a bottom plate, which is located below the lower clamping plate, and a buffer spring and a control device are provided on the bottom plate; the rotation of the driving assembly drives the permanent magnet inside the magnetic seat to rotate, and the magnetic seat externally displays magnetic attraction to the lower clamping plate to move upward, and acts together with the upper clamping plate to brake the rubber belt; The driving assembly is connected to the magnetic base through a connecting shaft, and the driving assembly is connected to the permanent magnet of the magnetic base to control the rotation angle of the magnetic base knob, and the relationship between the rotation angle of the magnetic base and the magnetic force is calculated by an algorithm, and the angular velocity of the driving assembly is dynamically adjusted to achieve constant deceleration braking of the tape; A buffer spring is fixed to each of the four corners of the base plate, and a lower clamping plate is arranged on the upper part of the buffer spring. The size of the lower clamping plate is the same as that of the base plate. The driving component controls the rotation angle of the magnetic base so that the magnetic base does not show magnetism to the outside, and the lower clamping plate is reset under the action of gravity.

2. The magnetic adsorption type belt conveyor braking device according to claim 1 is characterized in that: The algorithm is F=μ0 / [4S(H / δ)^2], where F is the magnetic force generated by the permanent magnet, μ0 is the vacuum permeability, H is the permanent magnet magnetomotive force, S is the permanent magnet surface area, and δ is the air gap.

3. The magnetic adsorption type belt conveyor braking device according to claim 2 is characterized in that: The support column of the frame is an angle iron structure.

4. The magnetic adsorption type belt conveyor braking device according to claim 3 is characterized in that: The upper clamping plate is fixedly arranged on the frame and is located above the lower adhesive tape. Magnetic seats are symmetrically arranged on both sides of the upper clamping plate, and a driving component is arranged on the permanent magnet.

5. The magnetic adsorption type belt conveyor braking device according to claim 4 is characterized in that: The control device is connected to an uninterruptible power supply, and the drive component is electrically connected to the control device.

6. The magnetic adsorption type belt conveyor braking device according to claim 5, characterized in that: The driving component is an electric motor or a pneumatic motor.

7. The magnetic adsorption belt conveyor braking device according to claim 6, characterized in that: The upper clamping plate and the lower clamping plate are covered with rubber layers.

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