Electrical control system of freight cable car

Abstract

The utility model discloses an electrical control system for a freight cable car, which relates to the technical field of freight electrical control, and comprises a main loop, a control loop and a protection interlocking signal wireless transmission loop, and the main loop comprises a low-voltage circuit breaker, a frequency converter, a traction motor and an electromagnetic band-type brake. The control loop comprises an intermediate relay, an uplink relay, a downlink relay, a band-type brake coil, a potentiometer and a self-locking loop, and the protection interlocking signal wireless transmission loop comprises a reset loop, an offside scram loop and an alarm indication loop. The freight cable car electrical control system fills the blank of the existing freight cable car electrical control system, is simple and economical to manufacture and flexible and convenient to use, and adopts the design of selectively moving the remote control box, so that an operator can perform flexible control according to field conditions, and the cable car operation condition is convenient to observe so as to ensure the stable and safe operation of the cable car.

Description

Technical Field

[0001] The utility model relates to the technical field of freight electrical control, in particular to an electrical control system for a freight cable car. Background Art

[0002] Freight cable cars offer the advantages of low cost, ease of operation, and simplicity for transporting materials in complex terrain. Their reliable operation is inseparable from electrical control systems. Years of operational experience show that failures typically occur in the control circuits. Currently, long-distance protection interlocking signal transmission between upper and lower stations of freight cable cars is primarily achieved through direct burial of signal cables, which are significantly affected by damage from rats, landslides, and other factors. This results in frequent fault points, inconvenient inspection and maintenance, high consumables requirements, and inconvenient installation. To ensure the safe and reliable transmission of protection interlocking signals, it is crucial to develop an economical, practical, and highly operational freight cable car electrical control system based on wireless transmission technology for switching signals. Utility Model Content

[0003] The technical problem addressed by this utility model is to provide an electrical control system for freight cable cars, based on the practicalities of operating and maintaining electrical control systems, and addressing the urgent need for freight transport in complex terrain. This system features simple wiring, easy maintenance, and is economical and practical. It solves the frequent failure issues associated with direct-buried signal cables on mountain roads, eliminating the need for signal cable laying and saving money, effectively resolving the issues previously discussed.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an electrical control system for a freight cable car, comprising a main circuit, a control circuit and a protection interlocking signal wireless transmission circuit, wherein the main circuit comprises a low-voltage circuit breaker, a frequency converter, a traction motor and an electromagnetic brake, the control circuit comprises an intermediate relay, an up relay, a down relay, a brake coil, a potentiometer and a self-locking circuit, and the protection interlocking signal wireless transmission circuit comprises a reset circuit, an off-limits emergency stop circuit and an alarm indication circuit.

[0005] In a preferred embodiment, the input terminal of the low-voltage circuit breaker is connected to a three-phase power supply, the output terminal of the low-voltage circuit breaker is connected to the input terminal of the inverter, the output terminal of the inverter is connected to the traction motor, and the electromagnetic brake is installed at the tail shaft of the traction motor.

[0006] In a preferred embodiment, the control loop also includes a limit switch SQ1 and an offside emergency stop button SB11, and the limit switch SQ1 and the offside emergency stop button SB11 are connected in series and then connected in parallel with the reset button SB12, and then connected in series with an intermediate relay at both ends of the control power supply. The two ends of the control power supply are connected with a buzzer indicator HL5 and an alarm button SB10 in series. The AC power supply is rectified by the DC power supply and used as the control loop power supply. The limit switch SQ1 and the offside emergency stop button SB11 are connected in series and then connected in parallel with the reset button SB12, and then connected in series with an intermediate relay at both ends of the control power supply to realize the offside emergency stop and reset functions. The buzzer indicator HL5 and the alarm button SB10 are connected in series and then connected at both ends of the control power supply to realize the sound and light alarm function.

[0007] In a preferred embodiment, the up relay and the up start button SB1, the up stop button SB3, and the up indicator light HL1 constitute an up circuit, and the down relay and the down start button SB2, the down stop button SB4, and the down indicator light HL2 constitute an up circuit. The up circuit and the down circuit realize an interlocking function by connecting the normally closed auxiliary contacts of each other's relays in series to protect the control circuit.

[0008] In a preferred embodiment, the up stop button SB3 and the up remote stop button SB7 are connected in series to form an up stop loop, and the down stop button SB4 and the down remote stop button SB8 are connected in series to form a down stop loop, which can realize the up or down stop function.

[0009] In a preferred embodiment, the upward start button SB1 and the upward remote start button SB5, the upward relay, and the upward auxiliary contact are connected in parallel to form an upward start and self-locking circuit, and the downward start button SB2 and the downward remote start button SB6, the downward relay, and the downward auxiliary contact are connected in parallel to form a downward start and self-locking circuit, which can realize the upward or downward starting self-locking function, and the upward relay's normally open upward auxiliary contact and the downward relay's normally open downward auxiliary contact are connected in parallel and in series with the brake coil YB to form a braking circuit, which realizes the function of releasing the brake when the cargo box goes up or down, and applying the brake when it stops.

[0010] In a preferred embodiment, the protection interlock signal wireless transmission circuit is composed of a wireless bidirectional transmission switch module, a control power supply, a limit switch SQ1, an offside emergency stop button SB11, an alarm button SB10, an intermediate relay and a buzzer indicator light HL1.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This utility model fills the gap in the existing freight cable car electrical control system. It is simple and economical to manufacture, flexible and convenient to use. The design of a mobile remote control box can be selected, so that the operator can flexibly control it according to the on-site situation and easily observe the cable car operation status to ensure stable and safe operation of the cable car.

[0013] 2. The control circuit of this utility model is designed according to the control function, and is divided into reset circuit, offside emergency stop circuit, alarm indication circuit, power indication circuit, up circuit, up indication circuit, down circuit, down indication circuit, remote control circuit, emergency stop indication circuit and brake circuit. The logic of each circuit is clear, which is convenient for installation, wiring and maintenance. The interlock protection design of the up circuit and the down circuit can prevent short circuit failure of the electrical control system;

[0014] 3. The protection interlocking signal of the utility model is designed with wireless transmission mode, replacing the traditional wired transmission mode. The wireless two-way transmission switch module is based on Lora (long-distance radio) modulation technology and adopts low-power management control chip with high sensitivity, low power consumption and long transmission distance. It transmits the on-site protection interlocking signal wirelessly and synchronously drives the relay to output dry contact signal at the remote end. The node capacity can reach 10A, which fully meets the control line requirements. The module is used in pairs, and can send and control each other without distinguishing between master and slave. No configuration is required, the wiring is simple, and the point-to-point communication can reach 5000 meters. The installation and wiring are simple, and the use and maintenance are convenient, which can improve the flexibility of on-site wiring and save a lot of signal cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the electrical principle of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the wireless transmission circuit for protection interlocking signals of the utility model;

[0017] Figure 3 This is the wiring diagram of the wireless two-way transmission switch of this utility model.

[0018] Numbers in the figure: 1. Low-voltage circuit breaker; 2. Frequency converter; 3. Traction motor; 4. Electromagnetic brake; 5. Intermediate relay; 6. Upward relay; 7. Downward relay; 8. Brake coil; 9. Potentiometer; 10. Reset circuit; 11. Overrun emergency stop circuit; 12. Alarm indication circuit; 13. Upward stop circuit; 14. Downward stop circuit; 15. Upward auxiliary contact; 16. Downward auxiliary contact. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] Example: Figure 1-Figure 3 As shown, the utility model provides a technical solution, an electrical control system for a freight cable car, including a main circuit, a control circuit and a protection interlocking signal wireless transmission circuit, the main circuit includes a low-voltage circuit breaker 1, a frequency converter 2, a traction motor 3 and an electromagnetic brake 4, the control circuit includes an intermediate relay 5, an up relay 6, a down relay 7, a brake coil 8, a potentiometer 9 and a self-locking circuit, and the protection interlocking signal wireless transmission circuit includes a reset circuit 10, an off-limits emergency stop circuit 11 and an alarm indication circuit 12.

[0021] In a preferred embodiment, the incoming terminal of the low-voltage circuit breaker 1 is connected to a three-phase power supply, the outgoing terminal of the low-voltage circuit breaker 1 is connected to the incoming terminal of the frequency converter 2, the outgoing terminal of the frequency converter 2 is connected to the traction motor 3, and the electromagnetic brake 4 is installed at the tail shaft of the traction motor 3.

[0022] In a preferred embodiment, the control loop also includes a limit switch SQ1 and an offside emergency stop button SB11, and the limit switch SQ1 and the offside emergency stop button SB11 are connected in series and then connected in parallel with the reset button SB12, and then connected in series with the intermediate relay 5 at both ends of the control power supply, and the two ends of the control power supply are connected with a series buzzer indicator HL5 and an alarm button SB10, and the AC power supply is rectified by the DC power supply as the control loop power supply, the limit switch SQ1 and the offside emergency stop button SB11 are connected in series and then connected in parallel with the reset button SB12, and then connected in series with the intermediate relay at both ends of the control power supply to realize the offside emergency stop and reset functions, and the buzzer indicator HL5 and the alarm button SB10 are connected in series to both ends of the control power supply to realize the sound and light alarm function.

[0023] In a preferred embodiment, the up relay 6 and the up start button SB1, the up stop button SB3, and the up indicator light HL1 constitute an up loop, and the down relay 7 and the down start button SB2, the down stop button SB4, and the down indicator light HL2 constitute an up loop.

[0024] In a preferred embodiment, the up stop button SB3 and the up remote stop button SB7 are connected in series to form an up stop loop 13, and the down stop button SB4 and the down remote stop button SB8 are connected in series to form a down stop loop 14, which can realize the up or down stop function.

[0025] In a preferred embodiment, the upward start button SB1 and the upward remote start button SB5, the upward relay 6, and the upward auxiliary contact 15 are connected in parallel to form an upward start and self-locking circuit, and the downward start button SB2 and the downward remote start button SB6, the downward relay 7, and the downward auxiliary contact 16 are connected in parallel to form a downward start and self-locking circuit, and the normally open upward auxiliary contact of the upward relay and the normally open downward auxiliary contact of the downward relay are connected in parallel and in series with the brake coil YB to form a braking circuit, thereby realizing the function of releasing the brake when the cargo box goes up or down, and applying the brake when it stops.

[0026] In a preferred embodiment, the protection interlock signal wireless transmission circuit is composed of a wireless bidirectional transmission switch module, a control power supply, a limit switch SQ1, an offside emergency stop button SB11, an alarm button SB10, an intermediate relay 5 and a buzzer indicator light HL1.

[0027] The working principle of this utility model is:

[0028] Power the main and control circuits through low-voltage circuit breaker 1. Set up inverter 2 according to the inverter installation manual. Use the uplink start button SB1 and uplink stop button SB3 to start and stop the uplink locally. Use the uplink remote start button SB5 and uplink remote stop button SB7 to start and stop the uplink remotely. Use the alarm button SB10 to issue an alarm. Use the emergency stop button SB9 to perform a local emergency stop. Use potentiometer 9 to adjust the cargo box's speed.

[0029] According to the actual operation of the cargo box, the offside emergency stop operation is performed through the offside emergency stop button SB11.

[0030] When the required cargo box is in place, automatic stopping can be achieved through the travel switch SQ1. When the stop button is pressed, the traction motor 3 can be braked through the electromagnetic brake 4. When the inverter 2 fails, the control power supply can be disconnected through the inverter fault output auxiliary contact ERR.

[0031] The up remote start button SB1, the up remote stop button SB7, the down remote control button SB6, the down remote control button SB8, the alarm button SB10 and the potentiometer 9 can be installed separately in the movable remote control box and connected to the electrical control box in the lower station through a control cable, thereby improving the operator's flexibility in on-site operation.

[0032] It is worth noting that the reset button SB12 is connected in parallel with the off-side emergency stop circuit and in series with intermediate relay 5. When the cargo box is off-side or the emergency stop button SB11 is pressed, the control circuit is de-energized. At this time, when adjusting the cargo box, the reset button SB12 should be pressed to ensure that the control circuit is energized. The reset button SB12 and the emergency stop button SB11 are self-locking buttons and should be reset promptly according to the on-site situation after operation.

[0033] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

Claims

1. A freight cable car electrical control system, characterized in that: The invention comprises a main circuit, a control circuit and a protection interlock signal wireless transmission circuit. The main circuit comprises a low-voltage circuit breaker (1), a frequency converter (2), a traction motor (3) and an electromagnetic brake (4). The control circuit comprises an intermediate relay (5), an up relay (6), a down relay (7), a brake coil (8), a potentiometer (9) and a self-locking circuit. The protection interlock signal wireless transmission circuit comprises a reset circuit (10), an overrun emergency stop circuit (11) and an alarm indication circuit (12).

2. The electrical control system for a freight cable car according to claim 1, characterized in that: The incoming line terminal of the low-voltage circuit breaker (1) is connected to a three-phase power supply, the outgoing line terminal of the low-voltage circuit breaker (1) is connected to the incoming line terminal of a frequency converter (2), the outgoing line terminal of the frequency converter (2) is connected to a traction motor (3), and the electromagnetic brake (4) is installed at the tail shaft of the traction motor (3).

3. The electrical control system for a freight cable car according to claim 1, characterized in that: The control circuit also includes a travel switch SQ1 and an offside emergency stop button SB11, and the travel switch SQ1 and the offside emergency stop button SB11 are connected in series and then in parallel with the reset button SB12, and then connected in series with the intermediate relay (5) to the two ends of the control power supply, and the two ends of the control power supply are connected with a series buzzer indicator light HL5 and an alarm button SB10.

4. The electrical control system for a freight cable car according to claim 2, characterized in that: The upward relay (6) and the upward start button SB1, the upward stop button SB3, and the upward indicator light HL1 constitute an upward circuit, and the downward relay (7) and the downward start button SB2, the downward stop button SB4, and the downward indicator light HL2 constitute an upward circuit.

5. The electrical control system for a freight cable car according to claim 4, characterized in that: The upward stop button SB3 and the upward remote stop button SB7 are connected in series to form an upward stop loop (13), and the downward stop button SB4 and the downward remote stop button SB8 are connected in series to form a downward stop loop (14).

6. The electrical control system for a freight cable car according to claim 5, characterized in that: The upward start button SB1, the upward remote start button SB5, the upward relay (6), and the upward auxiliary contact (15) are connected in parallel to form an upward start and self-locking circuit, and the downward start button SB2, the downward remote start button SB6, the downward relay (7), and the downward auxiliary contact (16) are connected in parallel to form a downward start and self-locking circuit.

7. The electrical control system for a freight cable car according to claim 1, characterized in that: The protection interlock signal wireless transmission circuit is composed of a wireless bidirectional transmission switch module, a control power supply, a travel switch SQ1, an offside emergency stop button SB11, an alarm button SB10, an intermediate relay (5) and a buzzer indicator light HL1.

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