A single-rail hoist braking system, method, and single-rail hoist including the braking system

Abstract

The present invention provides a monorail hoist braking system, method and monorail hoist including the braking system, relating to the technical field of mine transportation. The adopted solution is as follows: It includes a braking control module and a plurality of braking devices. The plurality of braking devices are all arranged on a bearing device, and the plurality of braking devices are all signal-connected to the braking control module. The braking control module can adjust the braking resistance of the braking devices. During the braking process, the braking control module can control the braking resistance to increase step by step. It further includes an electromagnetic clutch, which is used for the transmission connection between a pneumatic driving device and a speed reducer. The electromagnetic clutch is signal-connected to the braking control module. When braking is required, the electromagnetic clutch disconnects the transmission under the control of the braking control module. The present invention can achieve smooth braking and parking of the pneumatic monorail hoist, and reduce the impact on the track when the pneumatic monorail hoist brakes.

Description

Technical Field

[0001] The present invention relates to the technical field of mine transportation, and particularly to a monorail hoist braking system, a method, and a monorail hoist including the braking system. Background Art

[0002] During the transportation process of the mine transportation system, the monorail hoist is small in size and simple in system, and can be used in a relatively small space; the monorail hoist generally uses pneumatic drive, including a pneumatic drive device, a braking device, a loading device, a track, and a driving control system, etc. Compressed air enters the pneumatic drive device through an air filter, etc., provides power for the drive motor, converts the air compression energy into mechanical energy, realizes the traction of multiple loading devices, the loading device realizes the lifting and lowering of goods through a pneumatic hoist, and realizes the transportation of goods through multiple interconnected loading devices. The braking device realizes the braking of the monorail hoist under the control of the driving control system.

[0003] The track of the monorail hoist is generally hoisted on the top of the mine by a chain. When the monorail hoist brakes, due to the certain traveling speed of the loading device, large load, and large inertia, after the speed of the goods and the loading device changes sharply, a large impact is generated on the track, causing it to shake violently. In the long run, it will affect the reliability of the track and there are potential safety hazards.

[0004] Therefore, aiming at the current situation of the above-mentioned existing technologies, it is an urgent problem to develop a monorail hoist braking system, a method, and a monorail hoist including the braking system. Summary of the Invention

[0005] In order to overcome the deficiencies in the above-mentioned existing technologies, the present invention provides a monorail hoist braking system, a method, and a monorail hoist including the braking system, which can realize the smooth braking and parking of the monorail hoist and reduce the impact on the track when the monorail hoist brakes.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: A single-track crane braking system includes a braking control module and a plurality of braking devices. The plurality of braking devices are all arranged on a carrying device, and the plurality of braking devices are all signal-connected to the braking control module. The braking control module can adjust the braking resistance of the braking devices. During braking, the braking control module can control the braking resistance to increase gradually. It also includes an electromagnetic clutch, which is used for the transmission connection between a pneumatic driving device and a speed reducer. The electromagnetic clutch is signal-connected to the braking control module. When braking is required, the electromagnetic clutch disconnects the transmission under the control of the braking control module. It can achieve an increase in deceleration from small to large by gradually increasing the braking resistance, and the deceleration amplitude of the speed gradually increases, and the speed can be decreased step by step. Compared with the situation where the braking resistance reaches a fixed value in one step and the deceleration is a fixed value, the present invention does not have the phenomenon of a sharp decrease in speed along a straight line, can achieve smooth parking, and avoid a large impact on the track during braking.

[0007] Further, there are n levels of increasing braking resistance, where n≥4. By dividing the braking resistance required for braking into multiple levels, more different decelerations can be corresponding, making the speed decrease more smoothly and further reducing the impact.

[0008] Further, the braking device includes a brake plate, the brake plates are oppositely arranged on both sides of the track, the outer sides of the brake plates are both connected with brake arms, the middle and lower parts of the two brake arms are hinged, the two brake arms form a scissor structure, the lower parts of the two brake arms are respectively connected to both ends of a braking cylinder, and when the braking cylinder contracts, it can drive the two brake plates to move towards each other to clamp the track. The braking cylinder is fixed on a fixing plate, and the fixing plate is fixed on the carrying device. It can generate effective braking resistance through the braking cylinder.

[0009] Further, the braking cylinder is signal-connected to the braking control module. The braking control module can control the retraction and reset of the braking cylinder. A displacement sensor is also arranged on the braking cylinder. The displacement sensor is signal-connected to the braking control module. The displacement sensor can detect the extended length of the braking cylinder. The braking control module stores the extended lengths of the braking cylinder corresponding to different magnitudes of braking resistance. It can achieve adjusting the magnitude of the braking resistance by controlling the distance that the piston rod extends, which is convenient for adjusting the braking resistance.

[0010] Further, rollers are arranged between the brake plate and the track, and the rollers are ball-jointed with the brake plate. It can reduce the friction between the brake plate and the track during non-braking periods.

[0011] Further, the brake plate is made of a carbon fiber composite friction material. It can increase the friction force and has an explosion-proof effect.

[0012] Further, it further includes a speed sensor, which is signal - connected to the braking control module. The speed sensor is arranged on the bearing device, and can detect and transmit the speed of the bearing device under the control of the braking control module, providing a judgment criterion for the braking control module to change the braking resistance and improving the automation level.

[0013] The present invention also provides a single - rail crane braking method, which adopts a single - rail crane braking system and includes the following steps:

[0014] S1: When the braking control module receives a braking instruction, the braking control module controls the electromagnet clutch to cut off the power, disconnects the transmission of the pneumatic driving device, and controls the speed sensor to detect the speed of the bearing device;

[0015] S2: The braking control module controls the braking cylinder to contract;

[0016] S3: When the braking control module judges that the length transmitted by the displacement sensor reaches the length corresponding to the minimum braking resistance, the braking control module controls the braking cylinder to stop contracting;

[0017] S4: When the braking control module judges that the speed of the bearing device has decreased by 1 / n of the initial braking speed, the braking control module controls the braking cylinder to contract to the length corresponding to the next - level braking resistance;

[0018] S5: Repeat S4;

[0019] S6: When the braking control module judges that the speed of the bearing device is zero, the braking control module controls the braking cylinder to maintain its length;

[0020] S7: When the braking control module receives a start instruction, it controls the braking cylinder to reset to the initial position, and at the same time controls the electromagnetic clutch to be energized, and the pneumatic driving device resumes transmission.

[0021] The present invention also provides a single - rail crane, including a single - rail crane braking system, which can realize the smooth braking and parking of the pneumatic single - rail crane and reduce the impact on the track during the braking of the pneumatic single - rail crane.

[0022] Further, two adjacent bearing devices are connected by a damping buffer, which can absorb the impact generated between the bearing devices and prevent the track from shaking.

[0023] From the above technical solutions, it can be seen that the present invention has the following advantages:

[0024] The present solution provides a monorail hoist braking system, method and monorail hoist including the braking system. Through the cooperation among the braking control module, multiple braking devices and electromagnetic clutches, the braking resistance is gradually decreased, achieving smooth deceleration and reducing the impact on the track when the speed of the goods and the carrying device changes greatly; through the brake plate, brake arm and brake cylinder, an effective and adjustable braking resistance is provided; through the cooperation between the speed sensor and the braking control module, the braking control module can adjust the braking resistance according to the speed change, and by setting the damping buffer, the inertial impact between the carrying devices is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the present invention, the drawings required for description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic diagram of the control system of the monorail hoist braking system in the specific embodiment of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the braking device in the specific embodiment of the present invention.

[0028] Figure 3 It is a schematic diagram of the structure of the braking device in the braking state in the specific embodiment of the present invention.

[0029] Figure 4 It is a schematic diagram of the structure of the braking device in the non-braking state in the specific embodiment of the present invention.

[0030] Figure 5 It is a flowchart of the monorail hoist braking method in the specific embodiment of the present invention.

[0031] Figure 6 It is a schematic diagram of the structure of the monorail hoist in the specific embodiment of the present invention.

[0032] In the figure, 1. Pneumatic drive device, 2. Carrying device, 3. Braking device, 31. Brake plate, 32. Brake arm, 33. Roller, 34. Fixed plate, 35. Ball hinge, 36. Brake cylinder, 37. Displacement sensor, 4. Damping buffer, 5. Track, 6. Braking control module, 7. Speed sensor, 8. Electromagnetic clutch, 9. Reducer. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] To make the objectives, features, and advantages of the present invention more apparent and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the specific embodiments. Obviously, the embodiments described below are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in this patent, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of this patent.

[0034] As Figure 1 shown, the present invention provides a single-track crane braking system, which includes a braking control module 6, a plurality of braking devices 3, an electromagnetic clutch 8, and a speed sensor 7; the plurality of braking devices 3, the electromagnetic clutch 8, and the speed sensor 7 are all signal-connected to the braking control module 6, and the braking control module 6 can receive braking and start commands; the braking device 3 is connected to the carrying device 2, one end of the electromagnetic clutch 8 is mechanically connected to the output shaft of the pneumatic driving device 1, and the other end of the electromagnetic clutch 8 is mechanically connected to the input shaft of the speed reducer 9. The electromagnetic clutch 8 can be energized and de-energized under the action of the braking control module 6. When the electromagnetic clutch 8 is de-energized, the transmission is disconnected, and the pneumatic driving device 1 loses its traction effect; the braking control module 6 can control the braking resistance to increase gradually. The braking resistance is evenly divided into n levels from small to large. Every time the speed of the carrying device 2 decreases by 1 / n, the braking control module 6 controls the braking resistance generated by the braking device 3 to increase by 1 / n correspondingly, where n≥4, which can make the speed change smoothly and reduce the impact; the speed sensor 7 is arranged on the carrying device 2 and can detect and transmit the speed of the carrying device 2 in real time after braking starts, so that the braking control module 6 can judge when to change the braking resistance; the initial value of the braking resistance is jointly determined by the braking distance of the pneumatic single-track crane, the required braking duration, the load, the road section gradient, etc. The relevant data of the braking resistance can be obtained through experiments and stored in the driving control system. When braking is required, it can be directly called according to the corresponding data and road conditions.

[0035] As Figure 2 shown, the braking device 3 can adopt the following specific structure:

[0036] The braking device 3 includes a brake plate 31, a brake cylinder 36, a brake arm 32 and a fixing plate 34. The brake plates 31 are oppositely arranged on both sides of the track 5. The lower part of the brake plate 31 is connected with a roller 33 through a ball hinge 35. The roller 33 can move on the track 5, which can reduce the frictional resistance when not braking. The brake plate 31 is made of a carbon fiber composite friction material, which can increase the frictional resistance and has an explosion-proof function at the same time. The outer sides of the brake plates 31 are respectively hinged with the brake arms 32. The two brake arms 32 are oppositely arranged, and the middle and lower parts of the two brake arms 32 are hinged. The two brake arms 32 form a scissor structure. The brake cylinder 36 includes two oppositely arranged cylinders. The cylinder bodies of the two cylinders are fixedly connected, and their piston rods can extend or contract in opposite directions at the same time. The lower parts of the two brake arms 32 are respectively hinged with the corresponding piston rods. When the piston rods of the two cylinders extend, the two brake plates can move towards each other to clamp the web of the track 5. The two cylinders are both fixed on the fixing plate 34. The fixing plate 34 is used to be fixed on the loading device 2 to realize the connection between the braking device and the loading device 2. Displacement sensors 37 are arranged on both cylinders. The displacement sensors 37 are signal-connected with the braking control module 6. The displacement sensors 37 can detect the extension length of the corresponding piston rods. The braking control module 6 stores the extension lengths of the piston rods corresponding to different braking resistances. When the braking device 3 does not need to brake, the brake plate 31 is close to the web of the track 5 and slides on the track 5. When braking, the brake plate 31 will generate a movement in the height direction, but the brake plate 31 will not exceed the upper edge of the web of the track 5.

[0037] This specific embodiment also discloses a monorail crane braking method, including the following steps:

[0038] S1: When the braking control module receives a braking instruction, the braking control module controls the electromagnetic clutch to power off, disconnects the transmission of the pneumatic driving device, and controls the speed sensor to detect the speed of the loading device.

[0039] S2: The braking control module controls the two piston rods of the brake cylinder to contract towards each other.

[0040] S3: When the braking control module determines that the length transmitted by the displacement sensor 37 reaches the length corresponding to the minimum braking resistance, the braking control module controls the piston rod to stop contracting.

[0041] S4: When the braking control module determines that the speed of the loading device 2 has decreased by 1 / n of the initial braking speed, the braking control module controls the piston rod to contract to the length corresponding to the next level of braking resistance.

[0042] S5: Loop to execute S4.

[0043] S6: When the braking control module determines that the speed of the loading device is zero, the braking control module controls the piston rod to maintain its length.

[0044] S7: When the brake control module receives the start instruction, it controls the piston rod to reset to the initial position. At the same time, it controls the electromagnetic clutch to be powered on, and the pneumatic drive device resumes transmission.

[0045] In the above steps, the brake control module controls the piston rods of the two cylinders of the brake cylinder to contract and retract simultaneously to prevent the track from shaking during braking.

[0046] This specific embodiment also provides a single rail hoist, which includes the single rail hoist braking system in this specific embodiment and multiple load-bearing devices 2. The multiple load-bearing devices 2 are connected by damping buffers 4, which can absorb the impact generated between the multiple load-bearing devices 2 during the operation and braking of the single rail hoist and prevent impact on the track 5.

[0047] It can be seen from the above specific embodiments that the present invention has the following beneficial effects:

[0048] 1. Through the cooperation between the brake control module 6, multiple braking devices 3 and the electromagnetic clutch 8, the braking resistance is gradually decreased, realizing smooth deceleration and reducing the impact on the track 5 when the speed of the goods and the load-bearing device 2 changes greatly;

[0049] 2. Through the brake plate 31, the brake arm 32 and the brake cylinder 36, an effective and adjustable braking resistance is provided;

[0050] 3. Through the cooperation between the speed sensor 7 and the brake control module 6, the brake control module 6 can adjust the braking resistance according to the change of speed, ensuring timely adjustment of the braking resistance;

[0051] 4. By setting the damping buffer 4, the inertial impact between the load-bearing devices 2 is reduced.

[0052] The terms "upper", "lower", "outer side", "inner side", etc. (if any) in the specification, claims and above-mentioned drawings of the present invention are used to distinguish the relative relationships in position and do not have to be given qualitative definitions. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0053] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A single-track crane braking method, characterized in that, A single-rail brake system is used, the single-rail brake system comprising a brake control module (6) and a plurality of brake devices (3), the plurality of brake devices (3) are all arranged on a carrying device (2), the plurality of brake devices (3) are all connected to the brake control module (6) by signal, the brake device (3) comprises a brake plate (31), the brake plates (31) are relatively arranged on both sides of a track (5), the outer sides of the brake plates (31) are connected to brake arms (32), the middle and lower parts of the two brake arms (32) are hinged, the two brake arms (32) form a scissor structure, the lower parts of the two brake arms (32) are respectively connected to the two ends of a brake cylinder (36), and when the brake cylinder (36) contracts, it can drive the two brake plates (31) to move towards each other to clamp the track (5); the brake control module (6) can adjust the braking resistance of the brake device (3), and during the braking process, the brake control module (6) can control the braking resistance to increase step by step; and The invention comprises an electromagnetic clutch (8), the electromagnetic clutch (8) being used for transmission connection between the pneumatic drive device (1) and the reducer (9), the electromagnetic clutch (8) being signal-connected with the brake control module (6), and when braking is required, the electromagnetic clutch (8) is disconnected from transmission under the control of the brake control module (6); the brake cylinder (36) is signal-connected with the brake control module (6), the brake control module (6) is capable of controlling the retraction and reset of the brake cylinder (36), the brake cylinder (36) is also provided with a displacement sensor (37), the displacement sensor (37) is signal-connected with the brake control module (6), the displacement sensor (37) is capable of detecting the extension length of the brake cylinder (36), and the brake control module (6) stores the extension lengths of the brake cylinder (36) corresponding to different brake resistances; and the invention also comprises a speed sensor (7), the speed sensor (7) being signal-connected with the brake control module (6); S1: When the brake control module receives a brake command, the brake control module controls the electromagnetic clutch to cut off power, disconnects the transmission of the pneumatic drive device, and controls the speed sensor to detect the speed of the load-bearing device; S2: The brake control module controls the brake cylinder to retract; S3: When the brake control module determines that the length transmitted by the displacement sensor reaches the length corresponding to the minimum brake resistance, the brake control module controls the brake cylinder to stop contracting; S4: When the brake control module determines that the speed of the load-bearing device is reduced by 1 / n of the speed at the beginning of braking, the brake control module controls the brake cylinder to shrink to a length corresponding to the next level of braking resistance; S5: execute S4 in a loop; S6: When the brake control module determines that the speed of the load-bearing device is zero, the brake control module controls the brake cylinder to maintain its length; S7: When the brake control module receives the start command, it controls the brake cylinder to reset to the initial position, and at the same time controls the electromagnetic clutch to be energized, and the pneumatic drive device resumes transmission.

2. The monorail hoist braking method according to claim 1, characterized in that, The increasing level of braking resistance is set to n levels, n≥4.

3. The monorail hoist braking method according to claim 2, characterized in that, The braking cylinder (36) is fixed on a fixing plate (34), and the fixing plate (34) is used for being fixed on the carrying device (2).

4. The monorail hoist braking method according to claim 3, wherein A roller (33) is arranged between the braking plate (31) and the track (5), and the roller (33) is ball-jointed with the braking plate (31).

5. The monorail hoist braking method according to claim 4, characterized in that, The braking plate (31) is made of a carbon fiber composite friction material.

6. The single-track crane braking method according to claim 5, characterized in that, The speed sensor (7) is arranged on the carrying device (2), and the speed sensor (7) can detect and transmit the speed of the carrying device (2) under the control of the braking control module (6).

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