Overhead passenger device control line protection circuit

Abstract

The utility model discloses a protection line for a control line of an overhead man-riding device, and belongs to the field of circuit protection. The problems that short circuit, line breakage and electric leakage faults of a control circuit of a protection circuit of an overhead passenger device in the prior art are difficult to find in time, and potential safety hazards are likely to be caused are solved. A safety protection contact is connected to a power supply loop where a first power supply module, a switch assembly, a photoelectric coupling module and a second power supply module are located; when the power supply loop works normally, the PLC receives a signal of the power supply loop and judges the on-off state of the power supply loop according to the high and low levels of the signal, so that whether the protection circuit corresponding to the safety protection contact breaks down or not is known, and the specific fault line can be known according to the port corresponding to the fault signal detected by the PLC. And fault finding is facilitated, workers can handle faults in time, safe operation of the aerial passenger device is effectively guaranteed, and a powerful guarantee is provided for safe production of mines.

Description

Technical Field

[0001] The utility model belongs to the field of circuit protection and relates to a control line protection circuit of an overhead passenger device. Background Art

[0002] As the main equipment for transporting personnel in the inclined tunnel of the mine, the overhead passenger device has now achieved automatic unmanned driving. Its start, stop and protection emergency stop are completely realized by sensors. The protection device is operated by transmitting signals to the PLC through various fault protection control lines. After receiving the signal, the PLC makes an emergency stop after judgment. Due to the long length of the inclined tunnel, the high pressure in the tunnel, the easy deformation of the side and the human factors, control line failures (short circuit, leakage, disconnection, etc.) are often encountered, resulting in protection failure and cannot be discovered and handled in time, which has a negative impact on mine safety production.

[0003] In the prior art, the overpass protection, emergency stop protection, and rope drop protection of the overhead passenger device all introduce the contact signal of the travel switch or micro switch into the control PLC for detection. When the control line is normal, the protection action can be accurately detected by the PLC. However, when the control line of these protections is short-circuited, disconnected, or leaking, the PLC cannot receive the real protection signal, resulting in protection failure. The on-site staff cannot find it in time, which easily causes safety hazards. At the same time, since most control line faults occur inside the control cable, fault finding is also very difficult, affecting mine safety production. Utility Model Content

[0004] The technical problem to be solved by the utility model is that it is difficult to timely discover the short circuit, disconnection and leakage fault of the control circuit of the protection circuit of the prior art overhead passenger device, which easily causes safety hazards and affects the safe production of mines.

[0005] The utility model solves the above technical problems through the following technical solutions:

[0006] A control line protection circuit for an overhead passenger device comprises a PLC controller 11, a first power supply module 12, a switch assembly 13, a photoelectric coupling module 14, a safety protection contact 15, and a second power supply module 16; the signal input end of the PLC controller 11 is connected to the signal output end of the switch assembly 13; the safety protection contact 15 is a line contact of a fault protection control circuit of the overhead passenger device, one end of the safety protection contact 15 is connected to the second power supply module 16, and the other end of the safety protection contact 15 is connected to one end of the photoelectric coupler module 14; the other end of the photoelectric coupling module 14 outputs a driving signal to the switch assembly 13; the switch assembly 13 is connected to the first power supply module 12.

[0007] Specifically, the switch assembly 13 includes a plurality of DC relays, each of which includes a normally closed contact 131 and a coil 132, one end of the normally closed contact 131 is connected to the I0.0 input port of the PLC controller 11, the other end of the normally closed contact 131 is connected to the positive pole of the first power supply module 12, one end of the coil 132 is connected to the other end of the photoelectric coupling module 14, and the other end of the coil 132 is connected to the negative pole of the first power supply module 12.

[0008] Furthermore, the photoelectric coupling module 14 includes a plurality of photoelectric couplers, a first end of the photoelectric coupler is connected to the other end of the safety protection contact 15, a second end of the photoelectric coupler is connected to the negative pole of the second power supply module 16, a third end of the photoelectric coupler is connected to one end of the coil 132, and a fourth end of the photoelectric coupler is connected to the positive pole of the first power supply module 12.

[0009] Furthermore, the safety protection contact 15 includes a plurality of switch contacts, each of which is respectively connected to a photoelectric coupler and a second power supply module 16, one end of one of the switch contacts is connected to the positive pole of the second power supply module 16, and the other end of one of the switch contacts is connected to the first end of the photoelectric coupler.

[0010] Furthermore, the fault protection control circuit is a wire-pulling emergency stop protection circuit, an offside protection circuit or a rope-drop protection circuit, and the switch contacts are line contacts corresponding to the wire-pulling emergency stop protection circuit, the offside protection circuit or the rope-drop protection circuit.

[0011] Furthermore, an alarm is included, and the alarm is connected to an IO output port of the PLC controller 11.

[0012] The alarm is a buzzer and / or an indicator light.

[0013] It also includes a display screen, which is connected to another IO output port of the PLC controller 11.

[0014] Furthermore, the model of the PLC controller 11 is S7-200 SMART SR40.

[0015] Furthermore, the operating voltages of the PLC controller 11, the first power supply module 12, the switch assembly 13, the photoelectric coupling module 14 and the second power supply module 16 are all DC24V.

[0016] The advantages of the utility model are:

[0017] (1) The utility model connects the safety protection contact to the power supply circuit where the first power supply module 12, the switch assembly 13, the photoelectric coupling module 14, and the second power supply module 16 are located, so that when the fault protection control circuit corresponding to the safety protection contact has a disconnection, short circuit, or leakage fault, the power supply circuit will be powered off, and when the fault protection control circuit works normally, the power supply circuit works normally, so that the PLC controller 11 receives the signal of the power supply circuit, and the on and off of the power supply circuit can be determined according to the high and low levels of the signal, so as to know whether the fault protection control circuit corresponding to the safety protection contact has a disconnection, short circuit, or leakage fault, and the specific fault line can be known according to the port corresponding to the fault signal detected by the PLC controller 11, so as to facilitate fault finding and timely handling by the staff, avoid safety hazards, and avoid affecting the safe production of the mine.

[0018] (2) The PLC controller 11 of the utility model has multiple output interfaces, which can be connected to a display through different output interfaces, and can display the protection status of the fault protection control circuit corresponding to each safety protection contact in real time. At the same time, the output port can also alarm by connecting components such as a buzzer or an indicator light. When the fault protection control circuit corresponding to the safety protection contact fails, an alarm can be sounded in time to remind relevant personnel, and the relevant fault protection control circuit can be accurately located according to the information displayed on the display screen, thereby shortening the maintenance time and avoiding protection failure and causing casualties.

[0019] (3) The utility model can meet the different requirements of the PLC controller 11 for high and low frequency inputs according to the different switching quantities output by different control circuits by selecting the normally open and normally closed auxiliary contacts of the DC relay, thereby achieving different protection effects. The device is simple to understand, easy to install, and has significant effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The utility model is a schematic diagram of a control line protection circuit of an overhead passenger device according to an embodiment of the utility model. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] In this application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0023] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments of the specification:

[0024] See also Figure 1 The utility model provides an overhead passenger device control line protection circuit, including a PLC controller 11, a first power supply module 12, a switch component 13, a photoelectric coupling module 14, a safety protection contact 15, and a second power supply module 16.

[0025] The model of the PLC controller 11 is S7-200 SMART SR40, the working voltage is DC24V, the load current is 300mA, and it has multiple signal input interfaces and signal output ports; the first power supply module 12 is a 24V switching power supply, the input voltage is AC100-240V, the input current is 1.2A, the output voltage is DC24V, and the output current is 6A. It is the first power supply module of this circuit, and mainly provides power to the photoelectric coupling module 14 and the switch component 13; the switch component 13 includes multiple DC 24V control DC relays with a rated working voltage of 24V, wherein each DC relay includes a normally closed contact 131 and a coil 132, in this embodiment, the normally closed contact 131, and in actual application, the contact can be specifically set to a normally open or normally closed contact according to the actual protection circuit situation; the photoelectric The working power supply of the coupling module 14 is DC24V, the rated output voltage is 24VDC, the load current is 50mA, and it includes a light source and a light receiver, which can photoelectrically isolate the output signal of the safety protection contact from the PLC input signal; the safety protection contact 15 includes switch contacts corresponding to multiple fault protection control circuits, specifically the switch contacts of the wire pull emergency stop protection circuit control circuit, the switch contacts of the offside protection circuit control circuit, and the switch contacts of the rope drop protection circuit control circuit; the second power supply module 16 is a 24V switching power supply, with an input voltage of AC100-240V, an input current of 1.2A, an output voltage of DC24V, and an output current of 6A. It is the second power supply module of this circuit, which mainly provides power to the safety protection contact 15.

[0026] Among them, the signal input ports I0.0, I0.1, and I0.2 of the PLC controller 11 are respectively connected to one end of the normally closed contact 131 of each DC relay of the switch component 13, and the other end of the normally closed contact 131 of the switch component 13 is connected to the positive electrode of the first power supply module 12. The multiple signal output ports of the PLC controller 11 can be connected to devices such as buzzers, indicator lights, or display screens to provide alarm prompts and real-time circuit protection status display; one end of the coil 132 of the switch component 13 is connected to the third end of the photoelectric coupling module 14, and the other end of the coil 132 is connected to the negative electrode of the first power supply module 12; the first end of each photoelectric coupling module 14 is connected to one end of a switch contact of the safety protection contact 15, and the other end of the switch contact of the safety protection contact 15 is connected to the positive electrode of the second power supply module 16, the second end of the photoelectric coupling module 14 is connected to the negative electrode of the second power supply module 16, and the fourth end of the photoelectric coupling module 14 is connected to the positive electrode of the first power supply module 12.

[0027] When the fault protection control circuit is working normally, that is, the switch contacts of the wire pulling emergency stop protection circuit control circuit, the switch contacts of the offside protection circuit control circuit, and the switch contacts of the rope dropping protection circuit control circuit are normally closed, the second power supply unit 16 outputs a voltage signal which is added to the first end of the photoelectric coupling module 14 through the safety protection contact, the photoelectric coupling module 14 works normally, and the third end of the corresponding photoelectric coupler outputs a high-level signal, so that the coil 132 of the switch component 13 is energized, and the normally closed contact 131 of the switch component 13 remains closed, and the normal protection signal is transmitted to the signal input end of the PLC controller 11, so as to realize real-time monitoring of the control line status.

[0028] However, when a fault protection control circuit has a short circuit, open circuit, leakage or other faults, the switch contact corresponding to the safety protection contact 15 is disconnected, the photoelectric coupling module 14 cannot work normally, and the corresponding photoelectric coupler third terminal outputs a low-level signal. The coil 132 of the switch component 13 loses power, and its normally closed contact 131 changes from a closed state to an open state. The input end of the PLC controller 11 cannot receive a control signal, and an audible and visual alarm signal is issued to lock the overhead passenger device and start it again.

[0029] The device connects the safety protection contact to the power supply circuit where the first power supply module, the switch component, the optocoupler module and the second power supply module are located; when the power supply circuit is working normally, the PLC controller receives the signal of the power supply circuit, and determines the on and off of the power supply circuit according to the high and low levels of the signal, thereby knowing whether the fault protection control circuit corresponding to the safety protection contact is faulty, and according to the port corresponding to the fault signal detected by the PLC controller, it can know which specific faulty line is, which is conducive to fault finding and timely handling by the staff, effectively ensuring the safe operation of the overhead passenger device, and providing a strong guarantee for safe production in mines.

[0030] At the same time, the PLC controller of the utility model has multiple output interfaces, which can be connected to the display through different output interfaces, and can display the protection status of the fault protection control circuit corresponding to each safety protection contact in real time. At the same time, the output port can also alarm by connecting components such as buzzers or indicator lights. When the fault protection control circuit corresponding to the safety protection contact fails, the alarm can be timely alerted to remind relevant personnel, and the relevant fault protection control circuit can be accurately located according to the information displayed on the display screen, thereby shortening the maintenance time and avoiding protection failure and causing casualties.

[0031] This device can be widely used in monorail cranes, endless ropes, belts and other transportation systems that require long-distance protection control lines. For different switch quantities output by different control circuits, the normally open and normally closed auxiliary contacts of the DC relay can be selected to meet the different requirements of the PLC controller for high and low frequency inputs and achieve different protection effects. The device is easy to install, sensitive and reliable.

[0032] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An overhead passenger device control line protection circuit, characterized in that: The circuit comprises a PLC controller (11), a first power supply module (12), a switch component (13), a photoelectric coupling module (14), a safety protection contact (15), and a second power supply module (16); the signal input end of the PLC controller (11) is connected to the signal output end of the switch component (13); the safety protection contact (15) is a line contact of a fault protection control circuit of an overhead passenger device; one end of the safety protection contact (15) is connected to the second power supply module (16), and the other end of the safety protection contact (15) is connected to one end of the photoelectric coupling module (14); the other end of the photoelectric coupling module (14) outputs a drive signal to the switch component (13); and the switch component (13) is connected to the first power supply module (12).

2. The control line protection circuit of an overhead passenger device according to claim 1, characterized in that: The switch assembly (13) comprises a plurality of DC relays, each of which comprises a normally closed contact (131) and a coil (132), one end of the normally closed contact (131) being connected to the I0.0 input port of the PLC controller (11), the other end of the normally closed contact (131) being connected to the positive electrode of the first power supply module (12), one end of the coil (132) being connected to the other end of the photoelectric coupling module (14), and the other end of the coil (132) being connected to the negative electrode of the first power supply module (12).

3. The control line protection circuit of an overhead passenger device according to claim 2, characterized in that: The photoelectric coupling module (14) comprises a plurality of photoelectric couplers, wherein a first end of the photoelectric coupler is connected to the other end of the safety protection contact (15), a second end of the photoelectric coupler is connected to the negative electrode of the second power supply module (16), a third end of the photoelectric coupler is connected to one end of the coil (132), and a fourth end of the photoelectric coupler is connected to the positive electrode of the first power supply module (12).

4. The control line protection circuit of an overhead passenger device according to claim 3, characterized in that: The safety protection contact (15) comprises a plurality of switch contacts, each of which is respectively connected to a photoelectric coupler and a second power supply module (16), one end of one of the switch contacts is connected to the positive electrode of the second power supply module (16), and the other end of one of the switch contacts is connected to the first end of the photoelectric coupler.

5. The control line protection circuit of an overhead passenger device according to claim 4, characterized in that: The fault protection control circuit is a wire pull emergency stop protection circuit, an offside protection circuit or a rope drop protection circuit, and the switch contacts are line contacts corresponding to the wire pull emergency stop protection circuit, the offside protection circuit or the rope drop protection circuit.

6. The control line protection circuit of an overhead passenger device according to claim 1, characterized in that: It also includes an alarm, which is connected to an IO output port of the PLC controller (11).

7. The control line protection circuit of an overhead passenger device according to claim 6, characterized in that: The alarm is a buzzer and / or an indicator light.

8. The control line protection circuit of an overhead passenger device according to claim 1, characterized in that: It also includes a display screen, which is connected to another IO output port of the PLC controller (11).

9. The control line protection circuit of an overhead passenger device according to claim 1, characterized in that: The model of the PLC controller (11) is S7-200 SMART SR40.

10. The control line protection circuit of an overhead passenger device according to claim 1, characterized in that: The operating voltages of the PLC controller (11), the first power supply module (12), the switch component (13), the photoelectric coupling module (14) and the second power supply module (16) are all DC24V.

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