Bin collapse prevention coal feeder

Abstract

The utility model discloses an anti-collapse coal feeder, which comprises a base, a support frame, a coal bunker, a transition bunker, a conveyor belt, a driving roller, a turnabout roller, an oil cylinder and a gate, a coal outlet of the transition bunker is provided with a material speed measuring device, the tail end of the turnabout roller is provided with a roller speed measuring device, and a second coal piling sensor is arranged in the support frame; a first coal piling sensor is arranged at the front end of the gate, and a probe of a second coal piling sensor is arranged in the middle of the gate. According to the utility model, the growth rate of the coal flow speed is taken as a criterion, the problem of misjudgment of coal bunker bursting caused by the change of the drum speed in the prior art is solved, and the accuracy of judgment of the coal bunker bursting is improved; the PLC intelligently controls the opening degree of the gate, the purpose of controlling the raw coal flow is achieved, and the advantages of intelligence and automation are achieved; according to signals of the first coal piling sensor and the second coal piling sensor, closing of the gate can be controlled locally, production accidents caused by coal bunker breaking are avoided, and the safety of underground operation is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal feeders, in particular to an anti-collapse coal feeder. Background Art

[0002] During the coal mine production process, the coal feeder is an important device for transporting coal from the bunker to the transportation equipment. At present, there is no good dynamic detection method for coal bunker collapse, nor a protection device after the collapse occurs, which is likely to cause coal leakage, block the roadway, and even cause casualties. Therefore, an anti-collapse coal feeder is needed. Summary of the Invention

[0003] Aiming at the above-mentioned technical deficiencies, the purpose of the utility model is to provide an anti-collapse coal feeder. By setting a variety of sensors to detect the coal flow speed and adjust the opening of the coal feeder gate, the problem that the existing coal feeder is prone to collapse is solved. It has the advantages of intelligence and automation, and is beneficial to improving the safety of underground operations.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] The utility model provides an anti-collapse coal feeder, which includes a base, a support frame, a coal bunker, a transition bunker, a conveyor belt, a driving roller, a redirecting roller, an oil cylinder and a gate. A coal outlet is arranged on one side of the transition bunker. A material speed measuring device is arranged at the coal outlet of the transition bunker. The material speed measuring device is used to obtain the speed of the coal flow. The material speed measuring device is in contact with the coal flow at the coal outlet of the anti-collapse coal feeder, and the coal flow drives the material speed measuring device to rotate.

[0006] Preferably, it includes a redirecting roller, and a roller speed measuring device is arranged at the end of the redirecting roller. The rotation of the redirecting roller drives the roller speed measuring device to rotate, so as to obtain the speed of the redirecting roller.

[0007] Preferably, probes of a first coal accumulation sensor and a second coal accumulation sensor are respectively arranged at the front end and the middle part of the gate. The gate is provided with a movable gate plate, and the opening of the gate can be adjusted by the movable gate plate.

[0008] Preferably, it includes a rope displacement sensor, and the rope displacement sensor can obtain the opening of the gate in real time.

[0009] Preferably, a support is arranged on the side wall of the transition bunker, and a second coal accumulation sensor is installed in the support.

[0010] Preferably, it further includes a PLC controller, which is electrically connected to the material speed measurement device, the roller speed measurement device, the first coal accumulation sensor, the second coal accumulation sensor, the pull rope displacement sensor and the oil cylinder. The pull rope of the pull rope displacement sensor is connected to the gate, and the telescopic end of the oil cylinder is connected to the gate. The PLC controller can read the coal flow speed and the roller speed, and calculate the growth rate of the coal flow speed, which is the ratio of the difference between the coal flow speed and the roller speed to the roller speed.

[0011] Preferably, the PLC controller adjusts the opening of the anti-collapse coal feeder gate according to the growth rate of the coal flow speed. The pull rope displacement sensor transmits the gate opening to the PLC controller in real time. When the gate opening decreases but does not reach the set opening, the PLC controller controls the oil cylinder to drive the gate plate to move. When the gate opening decreases to the set opening, the gate plate stops moving. When the growth rate of the coal flow speed reaches the threshold set by the PLC controller, the PLC controller controls the oil cylinder to close the gate.

[0012] Preferably, when the PLC controller receives the signals from the first coal accumulation sensor and the second coal accumulation sensor, the PLC controller controls the oil cylinder to close the gate.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. The present utility model uses the growth rate of the coal flow speed as a criterion, solves the problem of misjudgment of coal bunker collapse induced by the change of roller speed in the prior art, and improves the accuracy of collapse judgment.

[0015] 2. The PLC controller in the present utility model intelligently controls the gate opening to achieve the purpose of controlling the raw coal flow rate, and has the advantages of intelligence and automation.

[0016] 3. The present utility model can locally control the closing of the gate according to the signals of the first coal accumulation sensor and the second coal accumulation sensor, avoids production accidents caused by coal bunker collapse, and improves the safety of underground operations. Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1Schematic diagram of the structure of an anti-collapse coal feeder provided by an embodiment of the present utility model from a first angle;

[0019] Figure 2 Internal structure schematic diagram of an anti-collapse coal feeder provided by an embodiment of the present utility model;

[0020] Figure 3 Schematic diagram of the structure of an anti-collapse coal feeder provided by an embodiment of the present utility model from a second angle;

[0021] Figure 4 Schematic diagram of the working process principle of an anti-collapse coal feeder provided by an embodiment of the present utility model.

[0022] Explanation of reference numerals: 1. Transition bin; 2. Gate; 3. Coal outlet of coal bin; 4. Coal bin; 5. Oil cylinder; 6. Gate plate; 7. First coal accumulation sensor; 8. Coal outlet of transition bin; 9. Material speed measuring device; 10. Roller speed measuring device; 11. Redirecting roller; 12. Conveyor belt; 13. Second coal accumulation sensor; 14. Probe of second coal accumulation sensor; 15. Driving roller; 16. Pull rope displacement sensor; 17. Support. Specific embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] Embodiment 1, as Figures 1 to 4 shown, an anti-collapse coal feeder includes a base, a support frame, a coal bin 4, a transition bin 1, a conveyor belt 12, a driving roller 15, a redirecting roller 11, an oil cylinder 5 and a gate 2. A coal outlet 8 of the transition bin is provided on one side of the transition bin 1. A material speed measuring device 9 is provided at the coal outlet 8 of the transition bin. The material speed measuring device 9 is used to obtain the speed of the coal flow. The material speed measuring device 9 contacts the coal flow at the coal outlet 8 of the transition bin, and the coal flow drives the material speed measuring device 9 to rotate.

[0025] A roller speed measuring device 10 is provided at the end of the redirecting roller 11. The rotation of the redirecting roller 11 drives the roller speed measuring device 10 to rotate to obtain the speed of the redirecting roller 11.

[0026] A support 17 is provided on the side wall of the transition bin 1, and a second coal accumulation sensor 13 is installed inside the support 17;

[0027] At the front end and middle part of the gate 2, a first coal accumulation sensor 7 and a second coal accumulation sensor probe 14 are respectively provided. The gate 2 is provided with a movable gate plate 6, and the movable gate plate 6 can adjust the opening degree of the gate 2; the rope displacement sensor 16 can obtain the opening degree of the gate 2 in real time.

[0028] The material speed measuring device 9, the roller speed measuring device 10, the rope displacement sensor 16, the first coal accumulation sensor 7 and the second coal accumulation sensor 13 are connected to the input end of the PLC controller, and the oil cylinder 5 is connected to the output end of the PLC controller. The PLC controller can read the coal flow speed and the roller speed and calculate the growth rate of the coal flow speed. The growth rate of the coal flow speed is the ratio of the difference between the coal flow speed and the roller speed to the roller speed.

[0029] Specifically, when the coal bunker 4 does not collapse, the coal flow speed is equal to the speed of the redirecting roller 11; when the coal bunker 4 collapses, the coal flow speed increases and is greater than the speed of the redirecting roller 11.

[0030] The PLC controller is electrically connected to the material speed measuring device 9, the roller speed measuring device 10, the first coal accumulation sensor 7, the second coal accumulation sensor 13, the rope displacement sensor 16 and the oil cylinder 5. The PLC controller adjusts the opening degree of the anti-collapse coal feeder gate 2 according to the growth rate of the coal flow speed. The rope displacement sensor 16 transmits the opening degree of the gate 2 to the PLC controller in real time. When the opening degree of the gate 2 decreases but does not reach the set opening degree, the PLC controller controls the oil cylinder to drive the gate plate 6 to move. When the opening degree of the gate 2 decreases to the set opening degree, the gate plate 6 stops moving. When the growth rate of the coal flow speed reaches the threshold set by the PLC controller, the oil cylinder closes the gate 2.

[0031] In practical applications, the growth rate of the coal flow speed can be set to 20%, 40%, or 50%, or any other value less than the growth rate threshold of the coal flow speed; the growth rate threshold of the coal flow speed is set to 70%, or any other value greater than the set maximum growth rate of the coal flow speed.

[0032] Specifically, when the growth rate of the coal flow speed increases to 20%, 40%, or 50%, the PLC controller will automatically control the opening degree of the gate 2 to decrease by 10%, 20%, 30% through the oil cylinder 5. At the same time, the rope displacement sensor 16 feeds back the opening degree of the gate 2 to the PLC controller in real time to determine whether the opening degree of the gate 2 has decreased in place, so as to achieve the purpose of controlling the coal flow; when the growth rate of the coal flow speed reaches the threshold of 70%, the PLC controller controls the oil cylinder 5 to completely close the gate to prevent the occurrence of the collapse accident of the coal bunker 4.

[0033] When the PLC controller receives the signals from the first coal accumulation sensor 7 and the second coal accumulation sensor 13, the PLC controller controls the oil cylinder to close the gate 2.

[0034] The working principle of the present utility model is as follows:

[0035] In step S1, the speed of the coal flow is obtained through the material speed measuring device 9. Here, the material speed measuring device 9 is arranged at the coal outlet 8 of the transition bin of the anti-collapse bin feeder. The coal flow drives the material speed measuring device 9 to rotate to obtain the speed of the coal flow. The anti-collapse bin feeder is installed at the coal outlet 3 of the coal bin. The speed of the deflecting roller 11 is obtained through the roller speed measuring device 10. Here, the roller speed measuring device 10 is installed at the end of the deflecting roller 11 of the anti-collapse bin feeder. The rotation of the deflecting roller 11 drives the roller speed measuring device 10 to rotate to obtain the speed of the deflecting roller 11;

[0036] In step S2, after obtaining the speed of the coal flow and the speed of the deflecting roller 11, the PLC controller calculates the growth rate of the coal flow speed and adjusts the opening degree of the gate 2 of the anti-collapse bin feeder according to the growth rate of the coal flow speed. The growth rate of the coal flow speed is the ratio of the difference between the coal flow speed and the roller speed to the roller speed;

[0037] In step S3, when the growth rate of the coal flow speed does not reach the threshold value, the PLC controller adjusts the opening degree of the gate 2 of the anti-collapse bin feeder to reduce the coal flow rate; when the growth rate of the coal flow speed reaches the threshold value, it is determined that the coal bin 4 collapses, and the PLC controller controls the oil cylinder to close the gate 2 of the anti-collapse bin feeder.

[0038] Obviously, those skilled in the art can make various changes and modifications to the present utility model without departing from the spirit and scope of the present utility model. Thus, if these modifications and variations of the present utility model fall within the scope of the claims of the present utility model and its equivalent technologies, the present utility model also intends to include these changes and modifications.

Claims

1. A coal feeder with anti-breaching bunker, comprising a base, a support frame, a coal bunker, a transition bunker, a conveyor belt, a driving roller, a redirecting roller, an oil cylinder and a gate, characterized in that: A transition bin coal outlet is arranged on one side of the transition bin, and a material speed measuring device is provided at the transition bin coal outlet. A roller speed measuring device is provided at the end of the redirecting roller. A bracket is provided on the side wall of the transition bin, and a second coal pile sensor is installed in the bracket. A first coal pile sensor is provided at the front end of the gate, and a probe of the second coal pile sensor is provided in the middle of the gate.

2. The anti-bin coal feeder according to claim 1, characterized in that: A pull rope displacement sensor is also included, which is used to obtain the opening of the gate in real time.

3. The anti-bin coal feeder according to claim 2, characterized in that: It also includes a PLC controller, which is electrically connected to the material speed measuring device, the roller speed measuring device, the first coal pile sensor, the second coal pile sensor, the pull rope displacement sensor and the oil cylinder.

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