CN211109607U

CN211109607U - Front and rear stage locking device of belt conveyor

Info

Publication number: CN211109607U
Application number: CN201922139921.7U
Authority: CN
Inventors: 刘晓明; 孙海龙; 张欣露; 郭威华
Original assignee: CITIC HIC Kaicheng Intelligence Equipment Co Ltd
Current assignee: CITIC HIC Kaicheng Intelligence Equipment Co Ltd
Priority date: 2019-12-04
Filing date: 2019-12-04
Publication date: 2020-07-28
Anticipated expiration: 2029-12-04

Abstract

The utility model provides a belt feeder front and back level blocking device, the device is by preceding stage belt feeder (4), back level belt feeder (3), speedtransmitter (1) and P L C control box (2) constitute, wherein back level belt feeder (3) aircraft nose and preceding stage belt feeder (4) tail overlap joint, speedtransmitter (1) is installed in preceding stage belt feeder (4) lower floor tail 30m department, whether normal operating of preceding stage belt feeder (4) is judged through gathering speedtransmitter (1) feedback signal in P L C control box (2), confirm whether start up and shut down are permitted in back level belt feeder (3) with this, this device can effectively avoid not having in time stopping because of the preceding stage belt feeder when unusually parkking, or the preceding stage belt feeder does not operate and the back level belt feeder is started, the preceding stage coal pressing accident that causes, effectively solve the belt fracture problem that the preceding stage belt feeder pressed coal caused.

Description

Front and rear stage locking device of belt conveyor

Technical Field

The utility model belongs to colliery automation equipment field, a belt feeder front and back level blocking device specifically says so.

Background

In the production process of mine enterprises, a plurality of belt conveyors are used for transportation, and the condition of overlapping of a plurality of belt conveyors exists. When the front-stage belt conveyor is abnormally parked, if the rear-stage belt conveyor is not timely parked or the front-stage belt conveyor is not operated, the rear-stage belt conveyor is started, the coal pressing accident of the front-stage belt conveyor can be caused, the breakage of the front-stage belt can be seriously caused, the problem is not solved, the potential safety hazard is brought, and the production progress of enterprises is influenced. Therefore, it is necessary to develop a front and rear stage locking device of a belt conveyor.

Disclosure of Invention

In order to solve the problem, the utility model provides a belt feeder front and back level blocking device. The device can effectively prevent accidents caused by starting of the rear-stage belt conveyor when the front-stage belt conveyor is abnormally stopped or the front-stage belt conveyor is not operated, and provides guarantee for safety production of the belt conveyor.

The technical scheme of the utility model is that the front and rear locking device of the belt conveyor comprises a speed sensor (1), a P L C control box (2), a rear belt conveyor (3) and a front belt conveyor (4).

The speed sensor (1) is connected with the P L C control box (2), and the machine head of the rear-stage belt conveyor (3) is in lap joint with the machine tail of the front-stage belt conveyor (4).

The speed sensor (1) is arranged at the position 30m away from the tail of the lower layer of the front-stage belt conveyor (4) and used for detecting the running state of the front-stage belt conveyor, and the P L C control box (2) is used for collecting feedback signals of the speed sensor (1) and carrying out starting locking and stopping control on the rear-stage belt conveyor (3).

The P L C control box (2) comprises a P L C (21), a power supply module (23) and a control relay (22). the P L C (21) in the P L C control box (2) is connected with the control relay (22), and the power supply module (23) provides power for the P L C (21) and the control relay (22).

The utility model has the advantages that: without the device, after the preceding stage belt feeder of two lapped belt feeders abnormally stops, if the following stage belt feeder does not stop or the preceding stage belt feeder does not operate, and the subsequent stage belt feeder starts, the coal pressing accident of the preceding stage belt feeder can be caused, the breakage of the preceding stage belt can be seriously caused, the production accident is caused, and the production of enterprises is influenced. After the device is used, the coal piling accident caused by the starting of the rear-stage belt conveyor when the front-stage belt conveyor is abnormally stopped or the front-stage belt conveyor is not operated can be effectively prevented, and the safety production of the belt conveyor is guaranteed.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic circuit diagram of the internal structure of the P L C control box.

Fig. 3 is a schematic diagram of a rear stage belt conveyor control loop.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in figure 1, the front-stage and rear-stage locking device of the belt conveyor comprises a speed sensor (1), a P L C control box (2), a rear-stage belt conveyor (3) and a front-stage belt conveyor (4), wherein the speed sensor (1) is connected with the P L C control box (2), the nose of the rear-stage belt conveyor (3) is in lap joint with the tail of the front-stage belt conveyor (4), and the speed sensor (1) is arranged at a position, 30m away from the tail, of the lower layer of the front-stage belt conveyor (4).

As shown in FIG. 2, the P L C control box (2) comprises a P L C (21), a power supply module (23) and a control relay (22), the speed sensor (1) is provided with three connection terminals, namely 24V, G and a signal, a 24V terminal is a direct-current 24V power positive electrode, a G terminal is a direct-current 24V power negative electrode, and a signal terminal is a pulse signal output terminal, the P L C (21) is provided with four connection terminals, namely 24V, G, Q.0 and I0.0, wherein the 24V terminal is a direct-current 24V power positive electrode, the G terminal is a 24V power negative electrode, a Q0.0 terminal is a P L C output signal terminal (positive level effective), the I0.0 is a P L C input signal terminal (positive level effective), the control relay (21) is composed of a relay coil K1 and a normally open contact K1-K, the power supply module (23) is provided with five connection terminals, namely L, N, 24V, G and PE, the power supply module (23) is connected with a power supply terminal N, the power supply terminal is connected with the power supply module (23) and the power supply module (23), the power supply module (23) is connected with an AC terminal, the power supply terminal, the speed sensor (24V) and the speed sensor (24V) through the power supply module (24V) and the power speed sensor (24V) and the relay (24V) output terminal, the signal output terminal of the relay (24V) output terminal of the speed sensor (24V) output terminal of the relay (24V) output terminal of the P6321) of the DC output terminal of the DC speed sensor (24V) after the DC terminal of the P638) is connected with the DC terminal of the P638C 2C.

As shown in fig. 3, K1-K is a normally open contact of the control relay (22), SB1 is a normally open contact of a start signal of the rear-stage belt control circuit, SB2 is a normally closed contact of a stop signal of the rear-stage belt control circuit, and KM1 is a coil of a rear-stage belt main motor control switch contactor. One end of the relay normally-open contact K1-K is connected with the positive electrode of the rear-stage belt control loop power supply, the other end of the relay normally-open contact is connected with one end of the starting signal normally-open contact SB1, the other end of the starting signal normally-open contact SB1 is connected with one end of the stop signal normally-closed contact SB2, the other end of the stop signal normally-closed contact SB2 is connected with one end of the control switch contactor coil KM1, and the other end of the control switch contactor coil KM1 is connected with the negative electrode of the rear-stage belt control loop power.

The machine head of the rear-stage belt conveyor (3) is in lap joint with the machine tail of the front-stage belt conveyor (4), the speed sensor (1) is arranged at the position 30m of the lower layer machine tail of the front-stage belt conveyor (4) and used for detecting the running state of the front-stage belt conveyor (3), the P L C (21) in the P L C control box (2) is used for collecting a feedback signal of the speed sensor (1), a relay coil K1 of the control relay (22) is controlled to suck after operation processing, and the rear-stage belt conveyor (3) is controlled to be started, locked and stopped through a normally open contact (K1-K) of the control relay.

In order to prevent misoperation of a speed sensor (1) and avoid shutdown or startup locking release of a rear-stage belt conveyor (3) due to misoperation of the speed sensor (1), a misoperation prevention judgment time value S1, a shutdown parameter value Bt and a startup permission parameter value Bk (Bk > Bt) are arranged in a P L C (21), if a feedback signal of the speed sensor (1) is smaller than the shutdown parameter value Bt and the action time of the speed sensor (1) is larger than the misoperation prevention judgment time value S1, a relay (22) is controlled to be in a disconnected state, the rear-stage belt conveyor (3) is stopped, and if the feedback signal of the speed sensor (1) is larger than the startup permission parameter value Bk and the action time of the speed sensor (1) is larger than the misoperation prevention judgment time value S1, the relay (22) is controlled to be in a suction state, the startup locking release and the startup locking release, and the starting of the rear-stage belt conveyor (3) is permitted.

The utility model discloses the course of work is during initial condition, P L C (21) in P L C control box (2) gather speedtransmitter (1) information at first, and judge if speedtransmitter (1) feedback signal is greater than and fills the start parameter value Bk, and speedtransmitter (1) action time is greater than and prevents malfunction judgement time value S1, then P L C (21) output signal, make relay coil K1 switch on, control relay normally open contact K1-K is closed, remove the shutting of back level belt feeder (3), it starts to fill back level belt feeder (3).

If the feedback signal of the speed sensor (1) is smaller than the shutdown parameter value Bt, the pre-stage belt conveyor (4) is judged to be in a stopped state and not run, the P L C (21) outputs a signal to lock the control relay (22), so that the normally open contact K1-K of the relay cannot be sucked and is in a disconnected state to form power-on locking, and the post-stage belt conveyor (3) cannot be started, thereby avoiding the coal accumulation caused by the fact that the pre-stage belt conveyor (4) does not run and the post-stage belt conveyor (3) is started.

If the feedback signal of the speed sensor (1) is smaller than a shutdown parameter value Bt and the action time of the speed sensor (1) is larger than an anti-misoperation judgment time value S1, the P L C (21) immediately controls the relay (22) to enable the normally open contact K1-K of the relay not to be attracted and the rear-stage belt conveyor (3) to be shut down and form locking at the same time, so that the starting condition cannot be met, and the rear-stage belt conveyor (3) cannot be started.

Claims

1. A front-stage and rear-stage locking device of a belt conveyor is characterized by comprising a speed sensor (1), a P L C control box (2), a rear-stage belt conveyor (3) and a front-stage belt conveyor (4), wherein the speed sensor (1) is connected with the P L C control box (2), a machine head of the rear-stage belt conveyor (3) is in lap joint with a machine tail of the front-stage belt conveyor (4), and the speed sensor (1) is arranged at a position, 30m away from the machine tail, of a lower layer of the front-stage belt conveyor (4) and used for detecting the running state of the front-stage belt conveyor.

2. The front and rear stage locking device of the belt conveyor according to claim 1, wherein the P L C control box (2) comprises a P L C (21), a power supply module (23) and a control relay (22), the P L C (21) is connected with the control relay (22), the power supply module (23) supplies power to the P L C (21) and the control relay (22), and the P L C control box (2) collects feedback signals of the speed sensor (1) and controls the starting, locking and stopping of the rear stage belt conveyor (3) through the control relay (22).