Coal blockage sensing structure for unloading chute of belt conveyor
By designing a coal blocking induction structure in the lower cargo chute in the belt transporter, and automatically disconnecting the motor power supply circuit using the proximity switch and the main contactor, the equipment overload caused by the blockage of the lower cargo chute is solved, and automatic protection and safe production are achieved.
Patent Information
- Application Number
- CN202421982972.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-15
- Publication Date
- 2025-07-04
- Estimated Expiration
- 2034-08-15
AI Technical Summary
The cargo chutes under the existing belt transporter are easily blocked, resulting in equipment overload and burning and safety hazards in the production system. It also requires manual disconnection of the main power supply circuit, which can easily lead to accidents if it is not handled in time.
A coal-blocking induction structure for under-cargo chute of belt transporter is designed, and the motor power supply circuit is automatically disconnected by using the proximity switch and the main contactor, and the proximity switch is pushed by induction mounting plate and triggering the proximity plate to induce coal accumulation to achieve automatic power outage.
It realizes the automatic disconnection of the motor power supply circuit when the chute is blocked, protects the safety of equipment, reduces the incidence of accidents, and improves the safety and processing efficiency of the production system.
Smart Images
Figure CN223060029U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of belt transportation, in particular to a coal blockage induction structure for the goods discharging chute of a belt conveyor. Background Art
[0002] In a coal washing workshop, a belt conveyor is usually used to transfer and transport raw coal. The goods discharging chute is one of the key components for connecting belt conveyors at different heights to achieve smooth transition of materials. The raw coal is transported from the upper belt conveyor to the goods discharging chute and slides down to the lower belt conveyor below by gravity. Currently, there are often problems of poor discharging and blockage in the goods discharging chute connected by belts. The reason is that the raw coal transported from the mine has wet and sticky coal quality, large gangue stones and many sundries, resulting in poor discharging in the chute and a large amount of accumulated goods blocking the belt conveyor. The main power supply circuit supplies power to the motor. When the goods discharging chute of the belt is blocked by coal, the equipment in the system will not stop running, and each belt continues to transport coal. The coal blocked in the goods discharging chute overflows onto the ground beyond the goods discharging chute, and most of it returns to the belt, causing the subsequent belts and chutes to be blocked by goods. This will cause the head reducer and motor to be buried by the accumulated coal, resulting in motor overload and burnout of the belt conveyor motor, and damage to internal components of the reducer and other mechanical and electrical failures. Since the entire production system is controlled by centralized interlocking according to the process, if a chute is blocked by coal and the equipment cannot be stopped in time, it will cause extremely serious interlocking mechanical and electrical transportation accidents, seriously affecting the safe operation of the entire production system. Secondly, the current belt posts are all on a patrol system. Due to the influence of coal blockage in the goods discharging chute of the belt conveyor, the belt is blocked by goods, and the pipelines in the production system are blocked, resulting in a long accident handling time and a large workload for workers. Therefore, when a coal blockage phenomenon occurs, it is necessary for the staff to eliminate the coal blockage in time. If the coal blockage problem cannot be eliminated online, the main power supply circuit needs to be disconnected in time. However, the on-off of the main power supply circuit is usually manually controlled. If the staff fails to detect the coal blockage in the chute in time, fails to remove the coal blockage site in time or fails to disconnect the main power supply circuit in time, the above consequences will occur. Content of the Utility Model
[0003] The purpose of the utility model is to provide a coal blockage induction structure for the goods discharging chute of a belt conveyor, which automatically disconnects the main power supply circuit for the motor operation when the goods discharging chute is blocked by coal, protects the safe operation of the production system equipment, and reduces the incidence of mechanical and transportation accidents.
[0004] The technical solution adopted by the utility model is as follows: a coal blocking induction structure for the goods discharging chute of a belt conveyor, which includes a main contactor, a motor power supply circuit for supplying power to the motor of the belt conveyor, and a coal blocking inductor; the coal blocking inductor includes a top plate, a trigger proximity plate, and an induction mounting plate; the top plate is connected to the bracket of the goods discharging chute at the head of the belt conveyor through a bolt assembly; the top end of the trigger proximity plate is suspended from the top plate, and its bottom end swings freely and extends downward to the goods discharging chute; the induction mounting plate is fixed to the top plate at the top end, and along the transmission direction of the belt conveyor, the induction mounting plate is located in front of the trigger proximity plate; a proximity switch is installed at the bottom of the induction mounting plate; the main contactor is connected to the motor power supply circuit of the motor of the belt conveyor through the normally closed contact of the proximity switch.
[0005] Further, an anti-collision bolt screw for protecting the proximity switch is installed at the bottom of the induction mounting plate, and the height position of the anti-collision bolt screw is lower than the height position of the proximity switch.
[0006] Further, the induction mounting plate is a bent plate, its bending line is in a horizontal state, enclosing a vertical section above the bending line and a bent section below the bending line, and the bent section is inclined forward; the proximity switch is arranged on the bent section.
[0007] Further, a through hole is opened on the induction mounting plate, and the proximity switch is installed in the through hole.
[0008] Further, the top end of the trigger proximity plate is hoisted to the top plate through a series of hanging rings.
[0009] Further, a series of hanging rings are respectively arranged on both sides of the top end of the trigger proximity plate; when the trigger proximity plate is in a vertical state, the series of hanging rings are vertically connected between the top end of the trigger proximity plate and the top plate.
[0010] Further, the series of hanging rings includes two hanging rings connected in series, the top hanging ring is fixedly connected to the top plate, and the bottom hanging ring is fixedly connected to the trigger proximity plate.
[0011] The beneficial effects of the utility model are as follows: the coal blocking induction structure for the goods discharging chute of the belt conveyor disclosed by the utility model, during production, if the coal discharging is not smooth due to wet and sticky coal quality, or if the chute is blocked by stuck gangue, the accumulated coal in the goods discharging chute piles up and pushes the trigger proximity plate close to the proximity switch. The proximity switch senses and turns on to work, the normally closed contact of the proximity switch in the main control circuit of the belt is disconnected, the auxiliary point of the main contactor acts to disconnect the motor power supply circuit, the motor stops running, and the equipment interlocked with this belt also stops running, protecting the safety of the equipment in the entire production operation system. The system stops in time, which can timely handle the accumulated goods chute and eliminate the fault point. Description of the Drawings
[0012] Figure 1The front view of the coal blockage sensor of the coal blockage induction structure of the goods unloading chute of the belt conveyor disclosed by the present utility model;
[0013] Figure 2 is Figure 1 the left view of;
[0014] Figure 3 The schematic diagram of the coal blockage induction structure of the goods unloading chute of the belt conveyor disclosed by the present utility model;
[0015] Figure 4 The schematic diagram of the centralized control program.
[0016] In the figure, there are top plate 1, trigger proximity plate 2, induction mounting plate 3, vertical section 301, bending section 302, through hole 303, proximity switch 4, anti-collision bolt screw 5, hanging ring string 6, goods unloading chute 7, bracket 8, main contactor 9, and motor 10. Specific implementation manners
[0017] The following further describes the present utility model in conjunction with the drawings and embodiments as follows:
[0018] The "upper", "lower", "left", "right", "front", "rear", "both ends", "one end", "the other end", etc. indicating directions in the present utility model are all based on its usage state position, that is, as shown in the attached Figure 1 figures, and the orientation or positional relationship based on the attached Figure 1 figures is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so it cannot be understood as a limitation to the present utility model.
[0019] In the description of this specification, it should be noted that unless otherwise clearly specified and limited, terms such as "installation", "provided with", "connection", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.
[0020] The coal blockage induction structure of the goods unloading chute of the belt conveyor, such as Figure 1 , Figure 2 and Figure 3As shown in the figure, it includes a main contactor 9, a motor power supply circuit for supplying power to the motor 10 of the belt conveyor, and a coal blockage inductor; the coal blockage inductor includes a top plate 1, a trigger proximity plate 2, and an induction mounting plate 3; the top plate 1 is connected to the bracket 8 of the lower cargo chute 7 at the head of the belt conveyor through a bolt assembly; the top end of the trigger proximity plate 2 is suspended from the top plate 1, and its bottom end swings freely and extends downward to the lower cargo chute 7; the induction mounting plate 3 has its top end fixed to the top plate 1, and along the conveying direction of the belt conveyor, the induction mounting plate 3 is located in front of the trigger proximity plate 2; a proximity switch 4 is installed at the bottom of the induction mounting plate 3; the main contactor 9 is connected to the motor power supply circuit of the motor 10 of the belt conveyor through the normally closed contact of the proximity switch 4.
[0021] In the coal blockage induction structure of the lower cargo chute of the belt conveyor disclosed by the present utility model, during production, if the coal discharge is not smooth due to wet and sticky coal quality, or the chute is blocked due to stuck gangue, the accumulated coal in the lower cargo chute 7 piles up and pushes the trigger proximity plate 2 to be within 8 mm of the proximity switch 4. The proximity switch 4 senses and turns on to work, the normally closed contact of the proximity switch 4 in the main control circuit of the belt is disconnected, the auxiliary point of the main contactor 9 acts to disconnect the motor power supply circuit, the motor 10 stops running, and the equipment interlocked with this belt in the centralized control program also stops running, protecting the safety of the equipment in the entire production operation system. The system stops in time, enabling timely handling of the accumulated cargo chute and eliminating the fault point.
[0022] To protect the proximity switch 4 from being impacted by the trigger proximity plate 2, preferably, an anti-collision bolt screw 5 for protecting the proximity switch 4 is installed at the bottom of the induction mounting plate 3, and the height position of the anti-collision bolt screw 5 is lower than the height position of the proximity switch 4. When the trigger proximity plate 2 rotates, its bottom first contacts the anti-collision bolt screw 5. At this time, there is a distance between the trigger proximity plate 2 and the proximity switch 4 above the anti-collision bolt screw 5, and the rotation of the trigger proximity plate 2 stops after its bottom contacts the anti-collision bolt screw 5.
[0023] If the induction mounting plate 3 is a vertical straight plate, when the bottom of the trigger proximity plate 2 contacts the anti-collision bolt screw 5, the distance between the trigger proximity plate 2 and the proximity switch 4 is relatively large. To reduce the distance between the trigger proximity plate 2 and the proximity switch 4, the induction mounting plate 3 is a bent plate, its bending line is in a horizontal state, enclosing a vertical section 301 above the bending line and a bent section 302 below the bending line, and the bent section 302 is inclined forward; the proximity switch 4 is arranged on the bent section 302. The bending angle is determined according to the actual situation, and it is required to meet that the distance between the trigger proximity plate 2 and the proximity switch 4 can reach within the induction distance of 8 mm.
[0024] The proximity switch 4 can be directly fixed to the induction mounting plate 3 by means of a buckle or the like. In this embodiment, for the convenience of installation, through holes 303 are provided on the induction mounting plate 3, and the proximity switch 4 is installed in the through holes 303.
[0025] The trigger proximity plate 2 can be hoisted to the top plate 1 by a suspension rope. In the present utility model, preferably, the top end of the trigger proximity plate 2 is hoisted to the top plate 1 through a suspension ring string 6.
[0026] It can be hoisted to the center of the top end of the trigger proximity plate 2 through a string of suspension ring strings 6. To ensure the stability of hoisting, preferably, a string of the suspension ring strings 6 is respectively arranged on both sides of the top end of the trigger proximity plate 2; when the trigger proximity plate 2 is in a vertical state, the suspension ring string 6 is vertically connected between the top end of the trigger proximity plate 2 and the top plate 1.
[0027] The suspension ring string 6 includes two serially connected suspension rings, the top suspension ring is fixedly connected to the top plate 1, and the bottom suspension ring is fixedly connected to the trigger proximity plate 2.
[0028] Embodiment:
[0029] Improve the belt conveyor in a coal washing workshop, and install the coal blockage inductor of the coal blockage induction structure of the belt conveyor lower cargo chute disclosed in the present utility model. The specific operation is as follows:
[0030] Use an iron plate with a thickness of 5 mm, a width of 100 mm, and a length of 300 mm as the top plate 1. Use two suspension rings connected in series to form a suspension ring string 6, and vertically weld a suspension ring string 6 side by side at the left end of the top plate 1. Use an iron plate with a thickness of 5 mm, a width of 85 mm, and a length of 300 mm as the trigger proximity plate 2. The bottom end of the suspension ring string 6 is welded to the top end of the trigger proximity plate 2. Weld an iron plate with a thickness of 3 mm, a width of 100 mm, and a length of 300 mm on the top plate 1 at a distance of 140 mm from the top plate 1140, and slightly bend it at a length of 155 mm from the top end according to the actual use on site to form the induction mounting plate 3. Drill a 15 mm hole at a distance of 60 mm from the bottom end of the induction mounting plate 3 to install the induction proximity switch 4, and drill a 10 mm hole at a distance of 20 mm from the bottom end of the induction mounting plate 3 to install an anti-collision bolt screw 5 for protecting the proximity switch 4. Drill 4 holes with a diameter of 15 mm at the right end of the top plate 1, and these 4 holes with a diameter of 15 mm are used for connection and fixation with the bolt screws drilled at the chute support under the belt head of the site.
[0031] Manufacture a blockage prevention sensor and install a proximity switch 4. The proximity switch 4 used is LJ18A3-8-J / EZ, 250V, and it senses and operates within a proximity distance of 8 mm. First, connect the blockage prevention sensor on the test bench, and then connect a light bulb. When the trigger proximity plate 2 is pushed by hand to be within 8 mm of the proximity switch, the proximity switch 4 senses and operates, turning on the light bulb. The proximity switch 4 is sensitive in operation. After the experiment is successful, install and use it on-site. After the on-site installation is completed, connect the proximity switch 4 to the terminal on the on-site control box, and input the signal of the proximity switch 4 into the PLC system. Through the relay input, compile and write it into the centralized control program. The program is as Figure 4 shown. When the coal chute 7 is blocked during production, the accumulated coal pushes the trigger proximity plate 2 to be within the proximity distance of 8 mm for induction operation. The normally closed point of the proximity switch 4 connected to the main control circuit of the belt disconnects the main contactor 9 of the belt motor 10, and the auxiliary point of the main contactor 9 operates to disconnect the main power supply circuit of the motor, and the motor stops running. The equipment interlocked with this belt in the centralized control program also stops running, protecting the entire production operation system.
[0032] Through on-site production actual verification, during the production in January, there was 1 coal chute blocked 2 times. When the coal accumulated in the coal chute reached the blockage prevention device, the accumulated coal pushed the iron plate of the proximity device to be within 8 mm of the proximity switch for induction operation, turning on the timer compiled in the centralized control program to disconnect the main belt circuit in 1 second, stopping the equipment, timely protecting the safe operation of the production system equipment, and reducing the incidence of mechanical transportation accidents. The use of this new technology has achieved good economic and social benefits.
[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. Coal blocking induction structure for the goods chute under the belt conveyor, characterized in that: It includes a main contactor (9), a motor power supply circuit for powering the motor (10) of the belt conveyor, and a coal jamming inductor; the coal jamming inductor includes a top plate (1), a trigger proximity plate (2), and an induction mounting plate (3); the top plate (1) is connected to the bracket (8) of the lower cargo chute (7) at the head of the belt conveyor through a bolt assembly; the top end of the trigger proximity plate (2) is suspended from the top plate (1), and its bottom end swings freely and extends downward to the lower cargo chute (7); the top end of the induction mounting plate (3) is fixed to the top plate (1), and along the transmission direction of the belt conveyor, the induction mounting plate (3) is located in front of the trigger proximity plate (2); a proximity switch (4) is installed at the bottom of the induction mounting plate (3); the main contactor (9) is connected to the motor power supply circuit of the motor (10) of the belt conveyor through the normally closed contact of the proximity switch (4).
2. The coal blocking induction structure of the cargo chute of the belt conveyor according to claim 1, characterized in that: An anti-collision bolt screw (5) for protecting the proximity switch (4) is installed at the bottom of the induction mounting plate (3), and the height position of the anti-collision bolt screw (5) is lower than the height position of the proximity switch (4).
3. The coal blocking induction structure of the cargo chute of the belt conveyor according to claim 1 or 2, characterized in that: The induction mounting plate (3) is a bent plate, its bending line is in a horizontal state, enclosing a vertical section (301) above the bending line and a bent section (302) below the bending line, and the bent section (302) is inclined forward; the proximity switch (4) is arranged on the bent section (302).
4. The coal blocking induction structure of the goods discharging chute of the belt conveyor according to claim 3, characterized in that: A through hole (303) is formed in the induction mounting plate (3), and the proximity switch (4) is installed in the through hole (303).
5. The coal blockage induction structure of the goods discharging chute of the belt conveyor according to claim 1 or 2, characterized in that: The top end of the trigger proximity plate (2) is hoisted to the top plate (1) through a suspension ring string (6).
6. The coal blocking induction structure of the cargo chute under the belt conveyor according to claim 5, characterized in that: A string of the suspension ring strings (6) is respectively arranged on both sides of the top end of the trigger proximity plate (2); when the trigger proximity plate (2) is in a vertical state, the suspension ring string (6) is vertically connected between the top end of the trigger proximity plate (2) and the top plate (1).
7. The coal blockage induction structure of the goods discharging chute of the belt conveyor according to claim 6, characterized in that: The suspension ring string (6) includes two serially connected suspension rings, the top suspension ring is fixedly connected to the top plate (1), and the bottom suspension ring is fixedly connected to the trigger proximity plate (2).