A belt pull rope protection system fault location circuit

Abstract

The utility model relates to the technical field of fault location, disclose a kind of for belt pull rope protection system fault location circuit. Including indicating lamp, power, soft start device, motor, pull rope protection device, first relay and second relay, the normally closed contact of pull rope protection device and the coil end of first relay constitute first control circuit, the anode of power is connected with the cathode of power through first control circuit;The coil end of second relay and indicating lamp constitute parallel circuit, the normally open contact of pull rope protection device is connected with the cathode of power through parallel circuit, the signal end of the detection PLC is connected in the two ends of the auxiliary contact of second relay, the auxiliary contact of first relay is connected with the circuit of control soft start device start;Power is connected with motor through soft start device, solved the problem of low efficiency of the existing pull rope protection device fault location.

Description

Technical Field

[0001] This utility model relates to the field of fault location technology, and in particular to a fault location circuit for a belt pull rope protection system. Background Technology

[0002] In the mining industry, belt conveyors are commonly used to transport materials. According to relevant regulations, belt conveyors should be equipped with pull rope protection devices, longitudinal tear protection devices, misalignment protection devices, and slippage detection devices to stop the conveyor in emergencies. Among these protective devices, pull rope protection devices are generally the most numerous, with approximately one device every 30 meters, although some conveyors can be hundreds of meters or even kilometers long. If the tension of the pull rope protection device's wire rope is improper—too loose and it may malfunction due to its own weight, or too tight and it may also malfunction, causing the conveyor to stop unnecessarily—the pull rope protection device needs to be checked and restored. If manual inspection and verification are relied upon, each pull rope protection device must be checked along the entire belt conveyor to determine which device is malfunctioning before restoration can be carried out. For long-distance belt conveyors, especially those underground in mines, inspection and verification are time-consuming, labor-intensive, and inefficient, impacting the company's normal production operations. Utility Model Content

[0003] This invention provides a fault location circuit for a belt pull rope protection system to solve the problem of low fault location efficiency in existing pull rope protection devices.

[0004] To achieve the above objectives, this utility model employs the following technical solution: A fault location circuit for a belt pull rope protection system includes an indicator light -HR, a power supply, a soft starter -RQ, a motor M, a pull rope protection device, a first relay -KS, and a second relay -LK. The normally closed contact of the pull rope protection device and the coil terminal of the first relay -KS form a first control circuit. The positive terminal of the power supply is connected to the negative terminal of the power supply through the first control circuit. The coil terminal of the second relay-LK and the indicator light-HR form a parallel circuit. The normally open contact of the pull rope protection device is connected to the negative terminal of the power supply through the parallel circuit. The two ends of the auxiliary contact of the second relay-LK are connected to the signal terminal of the detection PLC. The auxiliary contact of the first relay-KS is connected to the circuit that controls the soft starter-RQ to start. The power supply is connected to the motor M via a soft starter -RQ.

[0005] It can also be equipped with a passive I / O interface to transmit fault information to the central monitoring system via the PLC system in the form of I / O. The central monitoring system can also receive and display fault information in real time, providing remote support for workers' inspections, which can promote the digital transformation and upgrading of mining enterprises and help build smart mines.

[0006] Furthermore, it also includes a third relay - KA2. The auxiliary contact of the first relay - KS and the coil terminal of the third relay - KA2 form a third control circuit. The two ends of the third control circuit are connected to the positive and negative terminals of the power supply. The signal output terminal and signal input terminal of the soft starter - RQ are connected through the auxiliary contact of the third relay - KA2.

[0007] Furthermore, it also includes multiple detection circuits formed by the coil terminals of multiple fault relays and the detection device, a third relay-KA2, and a fourth relay-K1. The two ends of the detection circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fault relays, the auxiliary contacts of the first relay-KS, and the coil terminal of the fourth relay-K1 form a switching circuit. The two ends of the switching circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fourth relay-K1 and the coil terminal of the third relay-KA2 form a third control circuit. The signal output terminal and signal input terminal of the soft starter-RQ are connected through the first auxiliary contact of the third relay-KA2.

[0008] Furthermore, the fault signal output terminal of the soft starter-RQ is connected to the negative terminal of the power supply through the coil terminal of the fault relay, and the auxiliary contact of the fault relay is connected in series in the switching circuit.

[0009] Furthermore, it also includes a PLC switch-Kg1 and a multiplexer-SA. The third relay-KA2 also includes a second auxiliary contact. The second auxiliary contact, the auxiliary contact of the fourth relay-K1, and the coil terminal of the third relay-KA2 are connected in series to form a third control circuit. The common terminal of the multiplexer-SA is connected to the positive terminal of the power supply. The first output terminal of the multiplexer-SA is connected to the second auxiliary contact of the third relay-KA2 in the third control circuit. The second output terminal of the multiplexer-SA is connected between the second auxiliary contact of the third relay-KA2 and the auxiliary contact of the fourth relay-K1 in the third control circuit through the PLC switch-Kg1.

[0010] Furthermore, the multiplexer-SA also includes a third output terminal, which is connected to the negative terminal of the power supply through multiple detection circuits and switching circuits.

[0011] Furthermore, it also includes a control switch-SS and a safety switch-SF1. The safety switch-SF1 is connected in parallel with the second auxiliary contact of the third relay-KA2 in the third control circuit. The control switch-SS is located between the second auxiliary contact of the third relay-KA2 in the third control circuit and the first output terminal of the multiplexer-SA.

[0012] Beneficial effects: This utility model provides a fault location circuit for a belt conveyor pull rope protection system. Installed at the belt conveyor site, when a pull rope protection device malfunctions or trips, the corresponding indicator light illuminates. On-site inspectors can quickly locate the malfunctioning or tripping device based on the indicator light. Compared to the previous method of manually checking each pull rope protection device one by one, this improves inspection efficiency, reduces the workload of workers, and allows for faster recovery. This reduces production downtime and improves production, operational efficiency, and economic benefits. This device is particularly effective for long-distance belt conveyors, especially those in underground mines. Attached Figure Description

[0013] Figure 1 This is a circuit diagram of a fault location circuit for a belt pull rope protection system according to an embodiment of the present invention. Detailed Implementation

[0014] The technical solution of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "a" or "one," etc., do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "connected" or "linked," etc., are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up," "down," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship also changes accordingly.

[0016] Please see Figure 1A fault location circuit for a belt pull rope protection system includes an indicator light -HR, a power supply, a soft starter -RQ, a motor M, a pull rope protection device, a first relay -KS, and a second relay -LK. The normally closed contact of the pull rope protection device and the coil terminal of the first relay -KS constitute a first control circuit. The positive terminal of the power supply is connected to the negative terminal of the power supply through the first control circuit. The coil terminal of the second relay-LK and the indicator light-HR form a parallel circuit. The normally open contact of the pull rope protection device is connected to the negative terminal of the power supply through the parallel circuit. The two ends of the auxiliary contact of the second relay-LK are connected to the signal terminal of the detection PLC. The auxiliary contact of the first relay-KS is connected to the circuit that controls the soft starter-RQ to start. The power supply is connected to the motor M via a soft starter - RQ.

[0017] exist Figure 1 In this configuration, -HR11, -HR12, -HR×1, and -HR×2 are all indicator lights; -LK11, -LK12, -LK×1, and -LK×2 are all second relays.

[0018] In this embodiment, it also includes multiple detection circuits formed by the coil terminals of multiple fault relays and the detection device, a third relay-KA2 and a fourth relay-K1. The two ends of the detection circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fault relays, the auxiliary contacts of the first relay-KS, and the coil terminal of the fourth relay-K1 form a switching circuit. The two ends of the switching circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fourth relay-K1 and the coil terminal of the third relay-KA2 form a third control circuit. The signal output terminal and signal input terminal of the soft starter-RQ are connected through the first auxiliary contact of the third relay-KA2.

[0019] The detection circuit can be of various detection types, such as belt slippage detection, belt misalignment detection, tear detection, and other safety incident detection. Figure 1 In this circuit, -KP1, -KP2, -KSL, -KDH, and -K4 are all fault relays. By integrating the auxiliary contact terminals of the fault relays in the detection circuit into the switching circuit, the switching circuit will immediately disconnect once the above-mentioned problem occurs, that is, the coil terminal of the fourth relay -K1 will be de-energized. The auxiliary contact of the fourth relay -K1 and the coil terminal of the third relay -KA2 constitute the third control circuit. By switching the coil terminal of the third relay -KA2 in the third control circuit on and off, the starting control of the soft starter -RQ is realized.

[0020] In other embodiments, when there are no multiple detection circuits, only the third relay-KA2 can be set. The auxiliary contact of the first relay-KS and the coil terminal of the third relay-KA2 constitute the third control circuit. The two ends of the third control circuit are connected to the positive and negative terminals of the power supply. The signal output terminal and signal input terminal of the soft starter-RQ are connected through the auxiliary contact of the third relay-KA2.

[0021] The fault signal output terminal of the soft starter-RQ is connected to the negative terminal of the power supply through the coil terminals of fault relays K4, K3, and K2. The auxiliary contacts of fault relays K4, K3, and K2 are connected in series in the switching circuit.

[0022] The third control circuit includes a PLC switch-Kg1 and a multiplexer-SA. The third relay-KA2 also includes a second auxiliary contact. The second auxiliary contact, the auxiliary contact of the fourth relay-K1, and the coil terminal of the third relay-KA2 are connected in series to form the third control circuit. The common terminal of the multiplexer-SA is connected to the positive terminal of the power supply. The first output terminal of the multiplexer-SA is connected to the second auxiliary contact of the third relay-KA2 in the third control circuit. The second output terminal of the multiplexer-SA is connected between the second auxiliary contact of the third relay-KA2 and the auxiliary contact of the fourth relay-K1 in the third control circuit through the PLC switch-Kg1.

[0023] By setting PLC switch-Kg1, the PLC can control the on / off state of PLC switch-Kg1, thereby controlling the third control circuit and thus controlling the start of the soft starter-RQ.

[0024] The third control circuit also includes a control switch-SS and a safety switch-SF1. The safety switch-SF1 is connected in parallel with the second auxiliary contact of the third relay-KA2 in the third control circuit. The control switch-SS is located between the second auxiliary contact of the third relay-KA2 in the third control circuit and the first output terminal of the multiplexer-SA.

[0025] By setting the safety switch-SF1, when the multiplexer-SA is closed to the first output terminal, manually pressing (connecting) the safety switch-SF1 will close the control switch-SS. In the third control circuit, the coil terminal of the third relay-KA2 will be energized, and the second auxiliary contact will be connected, keeping the third control circuit continuously connected until the control needs to disconnect the control switch.

[0026] The multiplexer-SA also includes a third output terminal, which is connected to the negative power supply terminal through multiple detection circuits and switching circuits.

[0027] In this embodiment, the third output terminal and the second output terminal of the multiplexer-SA are kept connected. If a pull rope protection device malfunctions or fails, the corresponding pull rope protection device will connect its normally closed contact, the first control circuit will be energized, and the indicator light-HR corresponding to the pull rope protection device will light up. The operator can quickly locate the fault based on the indicator light-HR. The auxiliary contact of the first relay-KS in the first control circuit will be opened, and the PLC can also realize the rapid location of the fault simultaneously based on the opening of the auxiliary contact of the first relay. In this circuit, multiple detection circuits are also set up to detect various faults. When any type of fault occurs, the switching circuit is disconnected, and the auxiliary contact of the corresponding fourth relay-K1 is also disconnected, realizing the on / off control of the third control circuit. The start control of the soft start device is realized through the third relay-KA2 in the third control circuit. If the multiplexer is switched to the first output terminal and the control switch remains closed, the third control circuit will be energized after the safety switch is switched on, causing the second auxiliary contact to close. This will keep the third control circuit connected and continuously monitor the fault situation.

[0028] If the multiplexer is connected to the second output terminal, the PLC can send a circuit breaker signal to the PLC switch-Kg1 while performing fault location, so that the PLC switch-Kg1 is disconnected. When the safety switch and the control switch are in the disconnected state, a control chain can be realized: fault occurs - PLC switch-Kg1 is disconnected - the third control circuit is disconnected.

[0029] The preferred embodiments of this utility model have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and variations based on the concept of this utility model without creative effort. Therefore, all technical solutions that can be obtained by those skilled in the art based on the concept of this utility model through logical analysis, reasoning, or limited experimentation on the basis of existing technology should be within the scope of protection defined by the claims.

Claims

1. A fault location circuit for a belt pull rope protection system, comprising an indicator light (-HR), a power supply, a soft starter (-RQ), a motor (M), a pull rope protection device, a first relay (-KS), and a second relay (-LK), characterized in that, The normally closed contact of the pull rope protection device and the coil terminal of the first relay (-KS) form a first control circuit, and the positive terminal of the power supply is connected to the negative terminal of the power supply through the first control circuit. The coil terminal of the second relay (-LK) and the indicator light (-HR) form a parallel circuit. The normally open contact of the pull rope protection device is connected to the negative terminal of the power supply through the parallel circuit. The two ends of the auxiliary contact of the second relay (-LK) are connected to the signal terminal of the detection PLC. The auxiliary contact of the first relay (-KS) is connected to the circuit that controls the soft starter device (-RQ) to start. The power supply is connected to the motor (M) via a soft starter (-RQ).

2. The fault location circuit for a belt pull rope protection system according to claim 1, characterized in that, It also includes a third relay (-KA2), the auxiliary contact of the first relay (-KS) and the coil terminal of the third relay (-KA2) form a third control circuit, the two ends of the third control circuit are connected to the positive terminal and the negative terminal of the power supply, and the signal output terminal and signal input terminal of the soft starter (-RQ) are connected through the auxiliary contact of the third relay (-KA2).

3. The fault location circuit for a belt pull rope protection system according to claim 1, characterized in that, It also includes multiple detection circuits formed by the coil terminals of multiple fault relays and the detection device, a third relay (-KA2), and a fourth relay (-K1). The two ends of the detection circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fault relays, the auxiliary contacts of the first relay (-KS), and the coil terminal of the fourth relay (-K1) form a switching circuit. The two ends of the switching circuit are respectively connected to the positive and negative terminals of the power supply. The auxiliary contacts of the fourth relay (-K1) and the coil terminal of the third relay (-KA2) form a third control circuit. The signal output terminal and signal input terminal of the soft starter (-RQ) are connected through the first auxiliary contact of the third relay (-KA2).

4. The fault location circuit for a belt pull rope protection system according to claim 3, characterized in that, The fault signal output terminal of the soft starter (-RQ) is connected to the negative terminal of the power supply through the coil terminal of the fault relay, and the auxiliary contacts of the fault relay are connected in series in the switching circuit.

5. The fault location circuit for a belt pull rope protection system according to claim 3, characterized in that, It also includes a PLC switch (-Kg1) and a multiplexer (-SA). The third relay (-KA2) also includes a second auxiliary contact. The second auxiliary contact, the auxiliary contact of the fourth relay (-K1), and the coil terminal of the third relay (-KA2) are connected in series to form a third control circuit. The common terminal of the multiplexer (-SA) is connected to the positive terminal of the power supply. The first output terminal of the multiplexer (-SA) is connected to the second auxiliary contact of the third relay (-KA2) in the third control circuit. The second output terminal of the multiplexer (-SA) is connected between the second auxiliary contact of the third relay (-KA2) and the auxiliary contact of the fourth relay (-K1) in the third control circuit through the PLC switch (-Kg1).

6. The fault location circuit for a belt pull rope protection system according to claim 5, characterized in that, The multiplexer (-SA) also includes a third output terminal, which is connected to the negative power supply terminal through multiple detection circuits and switching circuits.

7. The fault location circuit for a belt pull rope protection system according to claim 5, characterized in that, It also includes a control switch (-SS) and a safety switch (-SF1), wherein the safety switch (-SF1) is connected in parallel with the second auxiliary contact of the third relay (-KA2) in the third control circuit, and the control switch (-SS) is disposed between the second auxiliary contact of the third relay (-KA2) in the third control circuit and the first output terminal of the multiplexer (-SA).

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