A coal blocking cleaning system for crusher feeding belt conveyor

Abstract

The utility model discloses a coal blocking cleaning system for a crusher feeding belt conveyor, wherein the discharge port of the discharging belt conveyor is connected to the feed port of a belt scale, and the discharge port of the belt scale is connected to the feed port of a conveyor belt conveyor; a sensor mounting frame is fixed on the top of a frame of the feeding belt conveyor close to one end of the crusher, and a proximity switch is installed on the sensor mounting frame, and the monitoring end of the proximity switch is perpendicular to the running direction of the belt. When coal blocking occurs in the crusher, after receiving abnormal signals from the proximity switch and the belt scale, the controller controls the feeding belt conveyor to reverse, and the coal accumulated at the feed port of the crusher will be transported to the feeding belt conveyor as the feeding belt conveyor runs in the reverse direction, thereby solving the problem of coal blocking and jamming at the feed port of the crusher, and the blockage clearing work can be completed without manual participation.

Description

Technical field:

[0002] The utility model relates to the field of coal mining and selection equipment, in particular to a coal blocking cleaning system for a crusher feeding belt conveyor. Background technology:

[0004] In the process of coal mining, the mined coal needs to be crushed for washing or transportation. The equipment used in the crushing process is a crusher. The coal is fed into the crusher through a feeding belt conveyor. Since the feeding amount of the feeding belt conveyor is affected by the amount of coal mined, it is impossible to feed the coal uniformly in most cases. Therefore, when the amount of coal sent to the crusher by the feeding belt conveyor is excessive within a certain period of time, since the crushing amount of the crusher is constant, a large amount of coal will accumulate at the feed port of the crusher. Under the friction of the forward movement of the feeding belt conveyor, the coal will be stuck between the belt of the feeding belt conveyor and the feed port of the crusher, which can easily cause scratches on the belt surface. In severe cases, the belt will be crushed to death and cannot continue to run. The machine can only be shut down and the stuck coal can only be taken out manually, which seriously affects normal production. Utility model content:

[0006] The utility model aims to provide a coal blocking cleaning system for a crusher feeding belt conveyor.

[0007] The utility model is implemented by the following technical solutions:

[0008] A coal-blocking cleaning system for a crusher feeding belt conveyor comprises a crusher, wherein a feed port of the crusher is connected to a feed port of a feeding belt conveyor, a discharge port of the crusher is connected to a feed port of a discharging belt conveyor, a discharge port of the discharging belt conveyor is connected to a feed port of a belt scale, and a discharge port of the belt scale is connected to a feed port of a conveyor belt conveyor;

[0009] A sensor mounting frame is fixed on the top of the frame of the feeding belt conveyor near one end of the crusher, and a proximity switch is installed on the sensor mounting frame, and the monitoring end of the proximity switch is perpendicular to the running direction of the belt;

[0010] The signal output ends of the proximity switch and the belt scale are electrically connected to the signal input ends of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the forward contactor and the reverse contactor; the normally open contact of the forward contactor is arranged between the motor of the feeding belt machine and the power supply, and the normally open contact of the reverse contactor is connected in parallel with the normally open contact of the forward contactor, and the normally open contact of the reverse contactor and the normally open contact of the forward contactor are connected to any two phases of the motor of the feeding belt machine in opposite directions.

[0011] Preferably, U1, V1, and W1 of the motor of the feeding belt conveyor are respectively connected to one end of the normally open contact of the star-connected contactor, and the other end of the normally open contact of the star-connected contactor is short-circuited;

[0012] The U1, V1, and W1 ends of the motor of the feeding belt conveyor are respectively connected to one end of the normally open contact of the delta connection contactor, and the other end of the normally open contact of the delta connection contactor is connected to the W2, U2, and V2 ends of the motor of the feeding belt conveyor;

[0013] The star connection contactor and the delta connection contactor are electrically connected to the signal input terminal of the controller respectively.

[0014] The advantages of the utility model are as follows: when the crusher is blocked by coal, the controller receives abnormal signals from the proximity switch and the belt scale and controls the feeding belt to reverse. The coal accumulated at the feed port of the crusher will be transported to the feeding belt as the feeding belt runs in the reverse direction, thus solving the problem of coal blockage and coal jam at the feed port of the crusher, and the blockage clearing work can be completed without manual intervention. Description of the drawings:

[0016] Figure 1 It is a structural schematic diagram of the utility model;

[0017] Figure 2 This is a schematic diagram of the power connection of the motor of the feeding belt conveyor;

[0018] Figure 3 It is a schematic diagram of a control circuit of the utility model.

[0019] In the figure: crusher 1, feeding belt conveyor 2, frame 2.1, motor 2.2, discharging belt conveyor 3, belt scale 4, conveyor belt conveyor 5, sensor mounting frame 6, proximity switch 7, controller 8, forward contactor KM1, reverse contactor KM2, star connection contactor KM3, delta connection contactor KM4. Specific implementation method:

[0021] like Figures 1 to 3 As shown, a coal blocking cleaning system for a crusher feeding belt conveyor comprises a crusher 1, wherein the feeding port of the crusher 1 is connected to the feeding port of a feeding belt conveyor 2, the discharging port of the crusher 1 is connected to the feeding port of a discharging belt conveyor 3, the discharging port of the discharging belt conveyor 3 is connected to the feeding port of a belt scale 4, and the discharging port of the belt scale 4 is connected to the feeding port of a conveying belt conveyor 5; a sensor mounting frame 6 is fixed on the top of a frame 2.1 of the feeding belt conveyor 2 close to one end of the crusher 1, a proximity switch 7 is installed on the sensor mounting frame 6, and the monitoring end of the proximity switch 7 is oriented perpendicular to the running direction of the belt;

[0022] The signal output ends of the proximity switch 7 and the belt scale 4 are electrically connected to the signal input end of the controller 8, and the signal output end of the controller 8 is electrically connected to the signal input ends of the forward contactor KM1 and the reverse contactor KM2; the normally open contact of the forward contactor KM1 is arranged between the motor 2.2 of the feeding belt conveyor 2 and the power supply, the normally open contact of the reverse contactor KM2 is connected in parallel with the normally open contact of the forward contactor KM1, and the normally open contact of the reverse contactor KM2 and the normally open contact of the forward contactor KM1 are connected to any two phases of the motor 2.2 of the feeding belt conveyor 2 in opposite directions;

[0023] Under normal operation, the coil of the forward contactor KM1 is energized, the normally open contact of the forward contactor KM1 is closed, the motor 2.2 rotates forward, the feeding belt conveyor 2 sends the coal to the crusher 1 for crushing, and the crushed coal is sent to the belt scale 4 through the discharging belt conveyor 3. After weighing, the belt scale 4 sends the coal to the conveyor belt conveyor 5 for transportation;

[0024] When the feeding belt 2 is blocked by coal, a large amount of coal accumulates at the feed port of the crusher 1, and the coal height exceeds the frame 2.1 of the feeding belt 2. The proximity switch 7 on the sensor mounting frame 6 detects the coal accumulation. The proximity switch 7 detects that the signal duration exceeds 30s, and the belt scale 4 detects that the coal output of the crusher 1 decreases rapidly, reducing to less than half of the normal coal output of 150t / h, that is, less than 75t / h. After receiving the abnormal signals from the proximity switch 7 and the belt scale 4, the controller 8 controls the coil of the forward contactor KM1 to lose power, the normally open contact of the forward contactor KM1 is disconnected, the motor 2.2 stops rotating, and the feeding belt 2 stops running. Then the controller 8 controls the coil of the reverse contactor KM2 to be energized, and the normally open contact of the reverse contactor KM2 is disconnected. The electric contact closes, motor 2.2 reverses and feed belt conveyor 2 reverses. The coal accumulated at the feed port of crusher 1 will be transported to feed belt conveyor 2 as feed belt conveyor 2 reverses, solving the problem of coal blockage and jamming at the feed port of crusher 1. After 5 minutes, the proximity switch 7 does not detect a signal for more than 30s, and the belt scale 4 detects that the coal output of crusher 1 is restored to more than 100t / h. Then, controller 8 controls the coil of reversing contactor KM2 to lose power, and the normally open electric contact of reversing contactor KM2 is disconnected, motor 2.2 stops running, and feed belt conveyor 2 stops running. Then, controller 8 controls the coil of forward contactor KM1 to be energized, and the normally open electric contact of forward contactor KM1 is closed, motor 2.2 rotates forward, and feed belt conveyor 2 resumes normal operation.

[0025] U1, V1, and W1 of the motor 2.2 of the feeding belt conveyor 2 are respectively connected to one end of the normally open contact of the star connection contactor KM3, and the other end of the normally open contact of the star connection contactor KM3 is short-circuited; U1, V1, and W1 ends of the motor 2.2 of the feeding belt conveyor 2 are respectively connected to one end of the normally open contact of the delta connection contactor KM4, and the other end of the normally open contact of the delta connection contactor KM4 is connected to W2, U2, and V2 ends of the motor 2.2 of the feeding belt conveyor 2; the star connection contactor KM3 and the delta connection contactor KM4 are respectively electrically connected to the signal input end of the controller 8;

[0026] Since the motor 2.2 used by the feeding belt conveyor 2 is used to transport coal, the instantaneous current at the time of starting is extremely high. In order to ensure the stability of the power supply system, the utility model adopts a star-delta step-down starting method;

[0027] Regardless of whether the feeding belt conveyor 2 rotates forward or reverse, when the motor 2.2 needs to be started, the controller 8 controls the coil of the star-connected contactor KM3 to be energized, and the normally open contact of the star-connected contactor KM3 is closed. The motor 2.2 is in star connection, and the starting voltage is reduced. After a delay of 10s, the controller 8 controls the coil of the star-connected contactor KM3 to be de-energized, and the normally open contact of the star-connected contactor KM3 is closed. At the same time, the controller 8 controls the coil of the delta-connected contactor KM4 to be energized, and the normally open contact of the delta-connected contactor KM4 is closed. After the motor 2.2 is started, it is switched to the delta connection to ensure that the motor 2.2 can operate normally.

[0028] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A coal-blocking cleaning system for a crusher feeding belt conveyor, comprising a crusher, wherein the feed port of the crusher is connected to the feed port of the feeding belt conveyor, and the discharge port of the crusher is connected to the feed port of the discharging belt conveyor, characterized in that: The discharge port of the discharging belt conveyor is connected to the feed port of the belt scale, and the discharge port of the belt scale is connected to the feed port of the conveying belt conveyor; A sensor mounting frame is fixed on the top of the frame of the feeding belt conveyor near one end of the crusher, and a proximity switch is installed on the sensor mounting frame, and the monitoring end of the proximity switch is perpendicular to the running direction of the belt; The signal output ends of the proximity switch and the belt scale are electrically connected to the signal input ends of the controller, and the signal output end of the controller is electrically connected to the signal input ends of the forward contactor and the reverse contactor; the normally open contact of the forward contactor is arranged between the motor of the feeding belt machine and the power supply, and the normally open contact of the reverse contactor is connected in parallel with the normally open contact of the forward contactor, and the normally open contact of the reverse contactor and the normally open contact of the forward contactor are connected to any two phases of the motor of the feeding belt machine in opposite directions.

2. A coal blocking cleaning system for a crusher feeding belt conveyor according to claim 1, characterized in that: U1, V1, and W1 of the motor of the feeding belt conveyor are respectively connected to one end of the normally open contact of the star connection contactor, and the other end of the normally open contact of the star connection contactor is short-circuited; The U1, V1, and W1 ends of the motor of the feeding belt conveyor are respectively connected to one end of the normally open contact of the delta connection contactor, and the other end of the normally open contact of the delta connection contactor is connected to the W2, U2, and V2 ends of the motor of the feeding belt conveyor; The star connection contactor and the delta connection contactor are electrically connected to the signal input terminal of the controller respectively.

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