Urban rail transit overhead line system switch blade training control circuit

Abstract

The utility model provides an urban rail transit overhead line system switch blade training control circuit comprising an opening and closing control module comprising an opening control loop and a closing control loop which are connected in parallel; the motor control module is respectively connected with the opening and closing control module and the contact network switch blade, comprises a motor, and controls the starting, stopping and / or steering of the motor according to the opening or closing signal of the opening and closing control module; the fault control module comprises an opening fault setting unit, a closing fault setting unit and a motor fault setting unit, the opening fault setting unit is connected in the opening control loop so that the opening control loop cannot output opening signals, and the closing fault setting unit is connected in the closing control loop so that the closing control loop cannot output closing signals; and the motor fault setting unit is connected in the motor control module, so that the motor control module cannot control the start, stop and / or steering of the motor. According to the utility model, students can better master the control circuit, and the on-site fault handling efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rail transit power supply and distribution, in particular to a contact network switch training control circuit for urban rail transit. Background Art

[0002] The overhead contact network is a key part of the urban rail transit system that supplies power to electric trains. The overhead contact network knife can be used for switching operations when the equipment is energized but not running with loads such as trains. During maintenance work, the equipment such as the line being repaired and the circuit breaker are electrically isolated from the energized parts, and used to separate and close small currents. In short, the opening and closing control of the overhead contact network knife is directly related to the transmission of electric energy and the normal operation of the train. Mastering the relevant circuit knowledge can ensure that the operator can perform the opening and closing operations accurately and quickly, avoiding power outages or safety accidents caused by misoperation; it can also quickly locate the problem and repair it when a fault occurs or maintenance is required, shortening the power outage time and reducing the impact on operations.

[0003] However, the existing contact network switch training equipment is outdated and crude, the power supply system cannot be operated at will, the control circuit cannot be fault-set and troubleshooted, and the equipment phenomenon cannot be judged. Trainees cannot thoroughly understand and master the contact network switch control circuit, which may lead to too long handling time when an accident occurs during the actual rail transit operation, causing potential safety accidents after the rail transit power outage, affecting the normal operation of the rail transit.

[0004] Therefore, in order to carry out rail transit contact network switch training and cultivate professional talents related to urban rail transit, it is necessary to build an operational contact network switch training control circuit that can perform fault settings. Utility Model Content

[0005] In order to solve the above problems, the utility model proposes an urban rail transit contact network switch training control circuit, which adds an on-site fault setting module, can improve trainees' mastery of the control circuit, shorten fault handling time, and improve on-site fault handling efficiency.

[0006] The utility model proposes a circuit for controlling the training of a contact network switch of urban rail transit, comprising:

[0007] The opening and closing control module comprises an opening control circuit and a closing control circuit connected in parallel, wherein the opening control circuit outputs an opening signal, and the closing control circuit outputs a closing signal;

[0008] A motor control module, connected to the opening and closing control module and the contact network knife, respectively, comprises a motor, and controls the start, stop and / or direction of the motor according to the opening or closing signal of the opening and closing control module, wherein the forward rotation of the motor drives the contact network knife to close, and the reverse rotation of the motor drives the contact network knife to open;

[0009] The fault control module includes an opening fault setting unit, a closing fault setting unit and a motor fault setting unit. The opening fault setting unit is connected to the opening control circuit, so that the opening control circuit cannot output an opening signal. The closing fault setting unit is connected to the closing control circuit, so that the closing control circuit cannot output a closing signal. The motor fault setting unit is connected to the motor control module, so that the motor control module cannot control the start, stop and / or steering of the motor.

[0010] In one embodiment,

[0011] The opening and closing control module is respectively connected to the positive electrode and the negative electrode of the first DC power supply through two circuit breaker switches;

[0012] The motor control module is respectively connected to the positive electrode and the negative electrode of the second DC power supply through two circuit breaker switches.

[0013] In one embodiment, the opening and closing control module further includes a travel switch and an emergency stop button, and the fault control module further includes a control circuit fault setting unit;

[0014] One end of the travel switch is connected to the positive electrode of the first DC power supply through a circuit breaker switch, and the other end is connected to one end of the control circuit fault setting unit, the other end of the control circuit fault setting unit is connected to one end of the emergency stop button, and the other end of the emergency stop button is respectively connected to the opening control circuit and the closing control circuit;

[0015] Among them, the control circuit fault setting unit controls the positive power supply of the opening and closing control module to lose power, the opening control circuit cannot output an opening signal, and the closing control circuit cannot output a closing signal.

[0016] In one embodiment, the opening and closing control module further includes a first remote control conversion switch, a local control closing button, a local control opening button and a remote control unit, and the fault control module further includes a remote control fault setting unit, and the first remote control conversion switch includes a first contact, a second contact, a third contact and a fourth contact;

[0017] The first contact and the third contact of the first remote-local control conversion switch are respectively connected to the emergency stop button, the second contact of the first remote-local control conversion switch is respectively connected to one end of the local control closing button and one end of the local control opening button through a locking condition, the other end of the local control closing button is connected to the closing control circuit, and the other end of the local control opening button is connected to the opening control circuit, the fourth contact of the first remote-local control conversion switch is connected to one end of the remote control fault setting unit, and the other end of the remote control fault setting unit is connected to the remote control unit through a locking condition;

[0018] The remote control fault setting unit controls the closing and / or opening of the contact network switch to be impossible to be remotely controlled, and the locking condition receives the closing position signal of the upper 1500V DC switch. When the DC switch is closed, the opening and closing control of the contact network switch is locked;

[0019] The first contact and the second contact of the first far-near control conversion switch are connected, and the first far-near control conversion switch is switched to the near control position. The third contact and the fourth contact of the first far-near control conversion switch are connected, and the first far-near control conversion switch is switched to the far control position.

[0020] In one embodiment, the remote control unit includes a second remote-local control conversion switch, a station-controlled closing button, a station-controlled opening button, a central-controlled closing button, and a central-controlled opening button, and the second remote-local control conversion switch includes a first end, a second end, a third end, and a fourth end;

[0021] The first end and the third end of the second remote-control conversion switch are respectively connected to the remote control fault setting unit through a locking condition, the second end of the second remote-control conversion switch is respectively connected to one end of the station-controlled closing button and one end of the station-controlled opening button, the other end of the station-controlled closing button is connected to the closing control circuit, and the other end of the station-controlled opening button is connected to the opening control circuit, the fourth end of the second remote-control conversion switch is respectively connected to one end of the central-control closing button and one end of the central-control opening button, the other end of the central-control closing button is connected to the closing control circuit, and the other end of the central-control opening button is connected to the opening control circuit;

[0022] Among them, the first end and the second end of the second remote control conversion switch are connected, and the second remote control conversion switch is switched to the station control position, the third end and the fourth end of the second remote control conversion switch are connected, and the second remote control conversion switch is switched to the central control position.

[0023] In one embodiment, the opening fault setting unit, the closing fault setting unit, the motor fault setting unit, the control circuit fault setting unit and the remote control fault setting unit are all switches.

[0024] In one embodiment, the closing control circuit includes a closing relay, and the opening control circuit includes an opening relay;

[0025] One end of the closing relay is connected to the opening position auxiliary contact of the travel switch and then respectively connected to the local control closing button, the station control closing button, the central control closing button and the first auxiliary contact of the opening relay, and the other end is connected to one end of the closing fault setting unit, and the other end of the opening fault setting unit is connected to the interlocking auxiliary contact of the opening relay and then connected to the negative electrode of the first DC power supply through the circuit breaker switch;

[0026] One end of the opening relay is connected to the closing auxiliary contact of the travel switch and then respectively connected to the local control opening button, the station control opening button, the central control opening button and the first auxiliary contact of the closing relay, and the other end is connected to one end of the opening fault setting unit, and the other end of the opening fault setting unit is connected to the interlocking auxiliary contact of the closing relay and then connected to the negative pole of the first DC power supply through the circuit breaker switch.

[0027] In one embodiment, the motor control module further includes a resistor and an electromagnetic clutch;

[0028] One end of the motor fault setting unit is connected to the positive electrode of the second DC power supply via a circuit breaker switch, and the other end is respectively connected to the motor, one end of the fourth auxiliary contact of the closing relay and one end of the fourth auxiliary contact of the opening relay, and the other end of the fourth auxiliary contact of the closing relay and the other end of the fourth auxiliary contact of the opening relay are respectively connected to the negative electrode of the second DC power supply after passing through the resistor, the electromagnetic clutch and the circuit breaker switch in sequence;

[0029] One end of the coil of the motor is respectively connected to one end of the second auxiliary contact of the closing relay and one end of the third auxiliary contact of the opening relay, and the other end is respectively connected to one end of the third auxiliary contact of the closing relay and one end of the second auxiliary contact of the opening relay, and then connected to the negative electrode of the second DC power supply via a circuit breaker switch, the other end of the second auxiliary contact of the closing relay is connected to the other end of the second auxiliary contact of the opening relay, and the other end of the third auxiliary contact of the closing relay is connected to the other end of the third auxiliary contact of the opening relay;

[0030] The second auxiliary contact, the third auxiliary contact and the fourth auxiliary contact of the closing relay are closed, the coil of the motor is energized in the forward direction, and the forward rotation of the motor drives the contact network switch to close;

[0031] The second auxiliary contact, the third auxiliary contact and the fourth auxiliary contact of the opening relay are closed, the coil of the motor is energized in the reverse direction, and the motor reverses to drive the contact network knife to open.

[0032] In one embodiment, the opening and closing control module further includes an intermediate relay, and two ends of the intermediate relay are respectively connected to the positive electrode and the negative electrode of the first DC power supply via a circuit breaker switch.

[0033] In one embodiment, the motor control module further includes a closing indicator light and an opening indicator light, wherein the closing indicator light is connected to a normally open auxiliary contact of the motor, and the opening indicator light is connected to a normally closed auxiliary contact of the motor;

[0034] Among them, when the normally open auxiliary contact of the motor is closed, the closing indicator light is on, and when the normally closed auxiliary contact of the motor is opened, the opening indicator light is on.

[0035] Compared with the prior art, the beneficial effects of the urban rail transit contact network switch training control circuit of the utility model are:

[0036] 1) The urban rail transit contact network switch training control circuit of the utility model adds a fault setting module. By simulating the fault conditions in the actual circuit, trainees can experience and learn how to deal with various faults in a safe and controlled environment. This simulation training can improve trainees' mastery of control circuits, troubleshoot common faults, shorten fault handling time, improve on-site fault handling efficiency, and enhance the safety management and control capabilities of power outage operations. It helps trainees better understand and remember relevant knowledge and skills, and cultivates their logical thinking, analytical ability and practical operation ability.

[0037] 2) The urban rail transit contact network switch training control circuit of the utility model is simple in design and easy to implement. The addition of various fault setting units can enable trainees to learn to quickly and accurately identify the fault points in the circuit through observation, testing and analysis.

[0038] 3) Through learning and practice, a group of talents with professional skills and practical experience can be cultivated to provide strong support for the development of the urban rail transit industry.

[0039] 4) Through simulated fault training, trainees can respond quickly when encountering real faults, take correct countermeasures, and reduce the impact of faults on operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a city rail transit contact network switch training control circuit according to an embodiment of the utility model;

[0041] Figure 2 It is a circuit diagram of a switch opening and closing control module in a training control circuit of a contact network switch of urban rail transit according to an embodiment of the utility model;

[0042] Figure 3 A circuit diagram of a motor control module in a training control circuit for a contact network switch of urban rail transit according to an embodiment of the utility model;

[0043] Figure 4 It is a schematic diagram of the structure of a contact network switch.

[0044] Reference numerals

[0045] 1. Opening fault setting unit, 2. Closing fault setting unit, 3. Motor fault setting unit, 4. Control circuit fault setting unit, 5. Remote control fault setting unit, 11. Opening in-place auxiliary contact of travel switch, 12. Closing in-place auxiliary contact of travel switch, 21. First auxiliary contact of closing relay, 22. Interlocking auxiliary contact of closing relay, 23. Second auxiliary contact of closing relay, 24. Third auxiliary contact of closing relay, 25. Fourth auxiliary contact of closing relay, 31. First auxiliary contact of opening relay, 32. Interlocking auxiliary contact of opening relay, 33. Second auxiliary contact of opening relay, 34. Third auxiliary contact of opening relay, 35. Fourth auxiliary contact of opening relay, A. Base frame, B. Support insulator, C. Pull rod insulator, D. Moving contact seat, E. Main contact knife, F. Static contact seat, G. Arc extinguishing moving contact, H. Arc extinguishing static contact. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the utility model, but the utility model can also be implemented in other ways different from those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0047] Secondly, the term "one embodiment" or "embodiment" in this application refers to a specific feature, structure or characteristic that can be included in at least one implementation of the utility model. The "in one embodiment" that appears in different places in this specification does not refer to the same embodiment, nor is it a separate or selective embodiment that is mutually exclusive with other embodiments.

[0048] The utility model proposes a circuit breaker training control circuit for urban rail transit contact network, including a switch opening and closing control module, a motor control module and a fault control module. Figure 1 .

[0049] The opening and closing control module includes an opening control circuit and a closing control circuit connected in parallel, wherein the opening control circuit is used to output an opening signal, and the closing control circuit is used to output a closing signal. The motor control module is connected to the opening and closing control module and the contact network knife respectively, and includes a motor ZD, and controls the start, stop and / or direction of the motor ZD according to the opening or closing signal of the opening and closing control module. Among them, the forward rotation of the motor ZD drives the contact network knife to close, and the reverse rotation of the motor ZD drives the contact network knife to open. The fault control module includes an opening fault setting unit 1, a closing fault setting unit 2 and a motor fault setting unit 3. The opening fault setting unit 1 is connected to the opening control circuit, so that the opening control circuit fails, that is, the opening signal cannot be output; the closing fault setting unit 2 is connected to the closing control circuit, so that the closing control circuit fails, that is, the closing signal cannot be output; the motor fault setting unit 3 is connected to the motor control module, so that the motor control module cannot control the start, stop and / or direction of the motor ZD.

[0050] The opening and closing control module of an embodiment of the utility model is connected to the positive and negative poles of the first DC power supply through two circuit breaker switches ZK2 respectively; the motor control module is connected to the positive and negative poles of the second DC power supply through two circuit breaker switches ZK1 respectively. The first DC power supply of an embodiment of the utility model is a 220V DC power supply.

[0051] It should be noted that the circuit breaker switch is used to protect the safety of circuits and equipment. When the DC power supply (including the first DC power supply and the second DC power supply) has abnormal current or the current in the circuit is overloaded, the circuit breaker switch can quickly cut off the circuit, thereby preventing excessive current from damaging the circuits and electrical equipment in the opening and closing control module or the motor control module, thereby helping to avoid safety hazards such as equipment overheating, short circuit and even fire; at the same time, the circuit breaker switch can also isolate the positive and negative poles of the DC power supply, so that when maintaining or repairing the opening and closing control module and the motor control module, the staff can operate safely to avoid accidental electric shock or misoperation.

[0052] The opening and closing control module of an embodiment of the utility model further includes a travel switch XK and an emergency stop button TA, and the fault control module further includes a control circuit fault setting unit 4. One end of the travel switch XK is connected to the positive pole of the first DC power supply through the circuit breaker switch ZK2, and the other end is connected to one end of the control circuit fault setting unit 4, and the other end of the control circuit fault setting unit 4 is connected to one end of the emergency stop button TA, and the other end of the emergency stop button TA is respectively connected to the opening control circuit and the closing control circuit. Among them, the control circuit fault setting unit 4 controls the positive power supply of the opening and closing control module to lose power, and the opening control circuit cannot output the opening signal and the closing control circuit cannot output the closing signal.

[0053] The travel switch XK is also called a position switch or limit switch. It is a commonly used low-current main electrical appliance. Its main function is to make its auxiliary contacts move by producing collisions of mechanical moving parts, thereby connecting or disconnecting the circuit. In this circuit, the travel switch XK comes from the contact network knife motor control cabinet. When the knife is in the opening and closing position, the contact of the travel switch XK is closed. The emergency stop button TA is used to quickly cut off the circuit of the opening and closing control module in the event of an emergency.

[0054] like Figure 2 As shown, the closing and opening control module of an embodiment of the utility model further includes a first remote-near control conversion switch WK, a near control closing button HA, a near control opening button FA and a remote control unit, and the fault control module further includes a remote control fault setting unit 5. The first remote-near control conversion switch WK includes a first contact, a second contact, a third contact and a fourth contact. The first contact and the third contact of the first remote-near control conversion switch WK are respectively connected to the emergency stop button TA; the second contact of the first remote-near control conversion switch WK is respectively connected to one end of the near control closing button HA and one end of the near control opening button FA through a locking condition, the other end of the near control closing button HA is connected to the closing control circuit, and the other end of the near control opening button FA is connected to the opening control circuit; the fourth contact of the first remote-near control conversion switch WK is connected to one end of the remote control fault setting unit 5, and the other end of the remote control fault setting unit 5 is connected to the remote control unit through a locking condition. Among them, the remote control fault setting unit 5 controls so that the contact network knife switch cannot be closed and / or opened by remote control; the locking condition receives the closing position signal of the upper 1500V DC switch, and when the DC switch is closed, the opening and closing control of the contact network knife switch is locked. The first contact and the second contact of the first remote and local control conversion switch WK are connected, and the first remote and local control conversion switch WK is switched to the local control position, that is, the contact network knife switch is closed or opened by local control closing button HA and local control opening button FA. The third contact and the fourth contact of the first remote and local control conversion switch WK are connected, and the first remote and local control conversion switch WK is switched to the remote control position, that is, the contact network knife switch is closed or opened by remote control through the remote control unit.

[0055] The remote control unit of one embodiment of the utility model comprises a second remote control conversion switch SA, a station control closing button HA1, a station control opening button FA1, a central control closing button HA2 and a central control opening button FA2, and the second remote control conversion switch SA comprises a first end, a second end, a third end and a fourth end. The first end and the third end of the second remote control conversion switch SA are respectively connected to the remote control fault setting unit 5 through a locking condition; the second end of the second remote control conversion switch SA is respectively connected to one end of the station control closing button HA1 and one end of the station control opening button FA1, the other end of the station control closing button HA1 is connected to the closing control circuit, and the other end of the station control opening button FA1 is connected to the opening control circuit; the fourth end of the second remote control conversion switch SA is respectively connected to one end of the central control closing button HA2 and one end of the central control opening button FA2, the other end of the central control closing button HA2 is connected to the closing control circuit, and the other end of the central control opening button FA2 is connected to the opening control circuit. Among them, the first and second ends of the second remote-control conversion switch SA are connected, and the second remote-control conversion switch SA is switched to the station control position, that is, the contact network knife is closed or opened by the station control closing button HA1 and the station control opening button FA1. The third and fourth ends of the second remote-control conversion switch SA are connected, and the second remote-control conversion switch SA is switched to the central control position, that is, the contact network knife is closed or opened by the central control closing button HA2 and the central control opening button FA2.

[0056] The first remote-control conversion switch WK and the second remote-control conversion switch SA in one embodiment of the utility model are both knobs.

[0057] It should be noted that in this application, near control refers to direct control operations performed near the device. Station control refers to control performed at the station or local area where the device is located, such as a station on a certain line of a subway. Central control refers to central control, that is, control of remote devices from a central control center, such as an overall rail transit control system.

[0058] The opening fault setting unit 1, the closing fault setting unit 2, the motor fault setting unit 3, the control circuit fault setting unit 4 and the remote control fault setting unit 5 of one embodiment of the utility model are all switches. The setting of each fault can be completed by manually disconnecting the switch.

[0059] like Figure 2 As shown, a closing control circuit of an embodiment of the utility model includes a closing relay HC, and an opening control circuit includes an opening relay FC.

[0060] In the closing control circuit, one end of the closing relay HC is connected to the opening position auxiliary contact 11 of the travel switch XK and then respectively connected to the local control closing button HA, the station control closing button HA1, the central control closing button HA2 and the first auxiliary contact 31 of the opening relay FC, and the other end is connected to one end of the closing fault setting unit 2, and the other end of the opening fault setting unit 1 is connected to the interlocking auxiliary contact 32 of the opening relay FC and then connected to the negative pole of the first DC power supply through the circuit breaker switch ZK2.

[0061] In the opening control circuit, one end of the opening relay FC is connected to the closing position auxiliary contact 12 of the travel switch XK and then respectively connected to the local control opening button FA, the station control opening button FA1, the central control opening button FA2 and the first auxiliary contact 21 of the closing relay HC, and the other end is connected to one end of the opening fault setting unit 1, and the other end of the opening fault setting unit 1 is connected to the interlocking auxiliary contact 22 of the closing relay HC and then connected to the negative pole of the first DC power supply through the circuit breaker switch ZK2.

[0062] Relays use small currents to control large currents, thereby controlling the circuit. The working principle of relays is based on the principle of electromagnetic induction. When the relay is working, the electromagnet is energized to generate a magnetic field, which attracts the armature and moves it, thereby closing or opening its auxiliary contacts, thereby controlling the on and off of the circuit.

[0063] like Figure 3 As shown, the motor control module of an embodiment of the utility model further includes a resistor R1 and an electromagnetic clutch DX. One end of the motor fault setting unit 3 is connected to the positive electrode of the second DC power supply via the circuit breaker switch ZK1, and the other end is respectively connected to the motor ZD, one end of the fourth auxiliary contact 25 of the closing relay HC and one end of the fourth auxiliary contact 35 of the opening relay FC, and the other end of the fourth auxiliary contact 25 of the closing relay HC and the other end of the fourth auxiliary contact 35 of the opening relay FC are respectively connected to the negative electrode of the second DC power supply via the resistor R1, the electromagnetic clutch DX and the circuit breaker switch ZK1.

[0064] One end of the coil of the motor ZD is respectively connected to one end of the second auxiliary contact 23 of the closing relay HC and one end of the third auxiliary contact 34 of the opening relay FC, and the other end is respectively connected to one end of the third auxiliary contact 24 of the closing relay HC and one end of the second auxiliary contact 33 of the opening relay FC, and then connected to the negative pole of the second DC power supply through the circuit breaker switch ZK1. The other end of the second auxiliary contact 23 of the closing relay HC is connected to the other end of the second auxiliary contact 33 of the opening relay FC, and the other end of the third auxiliary contact 24 of the closing relay HC is connected to the other end of the third auxiliary contact 34 of the opening relay FC. Among them, when the second auxiliary contact 23, the third auxiliary contact 24 and the fourth auxiliary contact 25 of the closing relay HC are closed, the coil of the motor ZD is energized in the forward direction, and the motor ZD rotates forward to drive the contact network knife to close; when the second auxiliary contact 33, the third auxiliary contact 34 and the fourth auxiliary contact 35 of the opening relay FC are closed, the coil of the motor ZD is energized in the reverse direction, and the motor ZD reverses to drive the contact network knife to open.

[0065] The addition of resistor R1 can eliminate high voltage and protect electronic devices from damage. The electromagnetic clutch DX is set to achieve functions such as fast starting, braking, forward and reverse rotation or speed regulation.

[0066] like Figure 2 As shown, the opening and closing control module of an embodiment of the utility model further includes an intermediate relay ZJ, and the two ends of the intermediate relay ZJ are respectively connected to the positive electrode and the negative electrode of the first DC power supply through the circuit breaker switch ZK2. The intermediate relay ZJ is used to control the power supply signal and the relay is closed when the first DC power supply has voltage.

[0067] like Figure 3 As shown, the motor control module of an embodiment of the utility model further includes a closing indicator light HD and an opening indicator light LD, wherein the closing indicator light HD is connected to the normally open auxiliary contact FK1 of the motor ZD, and the opening indicator light LD is connected to the normally closed auxiliary contact FK2 of the motor ZD. When the normally open auxiliary contact FK1 of the motor ZD is closed, the closing indicator light HD is on, and when the normally closed auxiliary contact FK2 of the motor ZD is open, the opening indicator light LD is on.

[0068] The urban rail transit contact network knife training control circuit of the utility model has three control modes for the closing circuit path of the contact network knife: local control, station control, and remote control. The specific operations are as follows:

[0069] By default, the upper 1500V DC switch is in the open position, and the locking conditions are all satisfied. Closing and opening conditions, closing the circuit breaker switch ZK2 makes the opening and closing control module energized, the intermediate relay ZJ is energized, and the control power signal output.

[0070] When the near control position is closed: turn the first far-near control conversion switch WK to the near control position (the first contact and the second contact are conductive), press the near control closing button HA, and the closing relay HC is energized through the auxiliary contact 11 of the opening position of the travel switch XK (at the same time, the first auxiliary contact 21 of the closing relay HC of the opening control circuit is opened, so that the opening control circuit is disconnected and de-energized, and the opening control circuit is locked), and through the interlocking auxiliary contact 32 of the opening relay FC to the negative pole of the first DC power supply. When the closing relay HC is energized, the second auxiliary contact 23, the third auxiliary contact 24 and the fourth auxiliary contact 25 of the closing relay HC in the motor control module are all closed, so that the coil of the DC motor ZD is energized in the forward direction, the contact network knife is closed, the normally open auxiliary contact FK1 of the motor ZD is closed, and the closing indicator HD is on.

[0071] When the station control position is closed: turn the first remote-local control conversion switch WK to the remote control position (the third contact and the fourth contact are conductive), through the locking condition, turn the second remote-local control conversion switch SA to the station control position (the first end and the second end are conductive), press the station control closing button HA1, and complete the closing of the contact network knife (refer to the local control position closing for subsequent circuits).

[0072] When the central control position is closed: turn the first remote-local control conversion switch WK to the remote control position (the third contact and the fourth contact are turned on), through the locking condition, turn the second remote-local control conversion switch SA to the central control position (the third end and the fourth end are turned on), press the central control closing button HA2 or when the central system issues a closing command, the closing auxiliary contacts of the central control circuit are closed, so that the closing circuit is turned on and the contact network knife is closed (refer to the local control position closing for subsequent circuits).

[0073] The urban rail transit contact network knife training control circuit of the utility model has three control modes for the contact network knife switch circuit path: local control, station control, and remote control. The specific operations are as follows:

[0074] By default, the upper 1500V DC switch is in the open position, and the locking conditions are all satisfied. Closing and opening conditions, closing the circuit breaker switch ZK2 makes the opening and closing control module energized, the intermediate relay ZJ is energized, and the control power signal output.

[0075] When the near control position is open: turn the first near and far control conversion switch WK to the near control position (the first contact is connected to the second contact), press the near control opening button FA, and close the auxiliary contact 12 in place through the travel switch XK, and the opening relay FC is energized (at the same time, the first auxiliary contact 31 of the opening relay FC of the closing control circuit is opened, so that the closing control circuit is disconnected and de-energized, and the closing control circuit is locked), and through the interlocking auxiliary contact 22 of the closing relay HC to the negative pole of the first DC power supply. When the opening relay FC is energized, the second auxiliary contact 33, the third auxiliary contact 34 and the fourth auxiliary contact 35 of the opening relay FC in the motor control module are all closed, so that the coil of the DC motor ZD is reversely energized, the contact network knife is opened, the normally closed auxiliary contact FK2 of the motor ZD is opened, and the LD opening indicator light is on.

[0076] When the station control position is opened: turn the first remote-local control conversion switch WK to the remote control position (the third contact and the fourth contact are connected), through the locking condition, turn the second remote-local control conversion switch SA to the station control position (the first end and the second end are connected), press the station control opening button FA1, and complete the opening of the contact network knife (refer to the local control position opening for subsequent circuits).

[0077] When the central control position is closed: turn the first remote-local control conversion switch WK to the remote control position (the third contact and the fourth contact are turned on), through the locking condition, turn the second remote-local control conversion switch SA to the central control position (the third end and the fourth end are turned on), press the central control opening button FA2 or when the central system issues an opening command, the opening auxiliary contacts of the central control circuit are closed, so that the opening circuit is turned on, and the opening of the contact network knife is completed (refer to the local control position opening for subsequent circuits).

[0078] Contact network switch is generally as Figure 4 As shown, it includes a base frame A, a supporting insulator B, a pull rod insulator C, a moving contact seat D, a main contact E, a static contact seat F, an arc extinguishing moving contact G, and an arc extinguishing static contact H. When the urban rail transit contact network knife training control circuit of the utility model is combined with an electric operating mechanism to control the contact network knife, the output shaft of the operating mechanism rotates about 120°, and after pressing the closing or opening button, the main contact E is opened and closed through the mechanism, the transmission shaft, the switch bevel gear set, the switch main shaft, and the pull rod insulator. When the switch is opened, the main contact E is opened a certain distance first, and then the arc extinguishing moving contact G is quickly opened, and then moves into place together with the main contact E. When the switch is closed, the arc extinguishing moving contact G contacts the arc extinguishing static contact H first, and then the main contact E contacts the static contact seat F, and moves into place together.

[0079] It should be noted that, in this application, unless otherwise clearly specified and limited, "connection", "setting" and other similar terms should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two components. Those skilled in the art can understand the specific meanings of the above terms in this application according to the specific circumstances. In addition, the terms "first", "second", "third", and "fourth" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0080] The construction and arrangement of the present application shown in a plurality of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible (e.g., the size, scale, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., voltage values, etc.), installation arrangements, use of materials, color, directional changes, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in the application. For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present utility model, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0081] Additionally, in order to provide a concise description of example embodiments, all features of an actual embodiment (ie, those features that are not relevant to the best mode presently contemplated for carrying out the invention or those that are not relevant to implementing the invention) may not be described.

[0082] It will be appreciated that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will be a routine task of design, fabrication, and production for those of ordinary skill having the benefit of this disclosure without undue experimentation.

[0083] The utility model has the following beneficial effects:

[0084] 1) The urban rail transit contact network switch training control circuit of the utility model adds a fault setting module. By simulating the fault conditions in the actual circuit, trainees can experience and learn how to deal with various faults in a safe and controlled environment. This simulation training can improve trainees' mastery of control circuits, troubleshoot common faults, shorten fault handling time, improve on-site fault handling efficiency, and enhance the safety management and control capabilities of power outage operations. It helps trainees better understand and remember relevant knowledge and skills, and cultivates their logical thinking, analytical ability and practical operation ability.

[0085] 2) The urban rail transit contact network switch training control circuit of the utility model is simple in design and easy to implement. The addition of various fault setting units can enable trainees to learn to quickly and accurately identify the fault points in the circuit through observation, testing and analysis.

[0086] 3) Through learning and practice, a group of talents with professional skills and practical experience can be cultivated to provide strong support for the development of the urban rail transit industry.

[0087] 4) Through simulated fault training, trainees can respond quickly when encountering real faults, take correct countermeasures, and reduce the impact of faults on operations.

[0088] The above-mentioned embodiments are only further explanations of the utility model, and are not intended to limit the utility model in other forms. The utility model may also have other various embodiments. Without departing from the spirit and essence of the utility model, those skilled in the art may make various corresponding modifications and changes according to the utility model, but these corresponding modifications and changes shall fall within the protection scope of the utility model.

Claims

1. A training control circuit for contact network of urban rail transit, characterized in that: include: The opening and closing control module comprises an opening control circuit and a closing control circuit connected in parallel, wherein the opening control circuit outputs an opening signal, and the closing control circuit outputs a closing signal; A motor control module, connected to the opening and closing control module and the contact network knife, respectively, comprises a motor, and controls the start, stop and / or direction of the motor according to the opening or closing signal of the opening and closing control module, wherein the forward rotation of the motor drives the contact network knife to close, and the reverse rotation of the motor drives the contact network knife to open; The fault control module includes an opening fault setting unit, a closing fault setting unit and a motor fault setting unit. The opening fault setting unit is connected to the opening control circuit, so that the opening control circuit cannot output an opening signal. The closing fault setting unit is connected to the closing control circuit, so that the closing control circuit cannot output a closing signal. The motor fault setting unit is connected to the motor control module, so that the motor control module cannot control the start, stop and / or steering of the motor.

2. The urban rail transit contact network switch training control circuit according to claim 1 is characterized in that: The opening and closing control module is respectively connected to the positive electrode and the negative electrode of the first DC power supply through two circuit breaker switches; The motor control module is respectively connected to the positive electrode and the negative electrode of the second DC power supply through two circuit breaker switches.

3. The urban rail transit contact network switch training control circuit according to claim 2 is characterized in that: The opening and closing control module also includes a travel switch and an emergency stop button, and the fault control module also includes a control circuit fault setting unit; One end of the travel switch is connected to the positive electrode of the first DC power supply through a circuit breaker switch, and the other end is connected to one end of the control circuit fault setting unit, the other end of the control circuit fault setting unit is connected to one end of the emergency stop button, and the other end of the emergency stop button is respectively connected to the opening control circuit and the closing control circuit; Among them, the control circuit fault setting unit controls the positive power supply of the opening and closing control module to lose power, the opening control circuit cannot output an opening signal, and the closing control circuit cannot output a closing signal.

4. The urban rail transit contact network switch training control circuit according to claim 3 is characterized in that: The opening and closing control module further includes a first remote control conversion switch, a local control closing button, a local control opening button and a remote control unit, and the fault control module further includes a remote control fault setting unit, and the first remote control conversion switch includes a first contact, a second contact, a third contact and a fourth contact; The first contact and the third contact of the first remote-local control conversion switch are respectively connected to the emergency stop button, the second contact of the first remote-local control conversion switch is respectively connected to one end of the local control closing button and one end of the local control opening button through a locking condition, the other end of the local control closing button is connected to the closing control circuit, and the other end of the local control opening button is connected to the opening control circuit, the fourth contact of the first remote-local control conversion switch is connected to one end of the remote control fault setting unit, and the other end of the remote control fault setting unit is connected to the remote control unit through a locking condition; The remote control fault setting unit controls the closing and / or opening of the contact network switch to be impossible to be remotely controlled, and the locking condition receives the closing position signal of the upper 1500V DC switch. When the DC switch is closed, the opening and closing control of the contact network switch is locked; The first contact and the second contact of the first far-near control conversion switch are connected, and the first far-near control conversion switch is switched to the near control position. The third contact and the fourth contact of the first far-near control conversion switch are connected, and the first far-near control conversion switch is switched to the far control position.

5. The urban rail transit contact network switch training control circuit according to claim 4 is characterized in that: The remote control unit includes a second remote-local control conversion switch, a station-controlled closing button, a station-controlled opening button, a central-controlled closing button, and a central-controlled opening button, and the second remote-local control conversion switch includes a first end, a second end, a third end, and a fourth end; The first end and the third end of the second remote-control conversion switch are respectively connected to the remote control fault setting unit through a locking condition, the second end of the second remote-control conversion switch is respectively connected to one end of the station-controlled closing button and one end of the station-controlled opening button, the other end of the station-controlled closing button is connected to the closing control circuit, and the other end of the station-controlled opening button is connected to the opening control circuit, the fourth end of the second remote-control conversion switch is respectively connected to one end of the central-control closing button and one end of the central-control opening button, the other end of the central-control closing button is connected to the closing control circuit, and the other end of the central-control opening button is connected to the opening control circuit; Among them, the first end and the second end of the second remote control conversion switch are connected, and the second remote control conversion switch is switched to the station control position, the third end and the fourth end of the second remote control conversion switch are connected, and the second remote control conversion switch is switched to the central control position.

6. The urban rail transit contact network switch training control circuit according to claim 4 is characterized in that: The opening fault setting unit, the closing fault setting unit, the motor fault setting unit, the control circuit fault setting unit and the remote control fault setting unit are all switches.

7. The urban rail transit contact network switch training control circuit according to claim 5 is characterized in that: The closing control circuit includes a closing relay, and the opening control circuit includes an opening relay; One end of the closing relay is connected to the opening position auxiliary contact of the travel switch and then respectively connected to the local control closing button, the station control closing button, the central control closing button and the first auxiliary contact of the opening relay, and the other end is connected to one end of the closing fault setting unit, and the other end of the opening fault setting unit is connected to the interlocking auxiliary contact of the opening relay and then connected to the negative electrode of the first DC power supply through the circuit breaker switch; One end of the opening relay is connected to the closing auxiliary contact of the travel switch and then respectively connected to the local control opening button, the station control opening button, the central control opening button and the first auxiliary contact of the closing relay, and the other end is connected to one end of the opening fault setting unit, and the other end of the opening fault setting unit is connected to the interlocking auxiliary contact of the closing relay and then connected to the negative pole of the first DC power supply through the circuit breaker switch.

8. The urban rail transit contact network switch training control circuit according to claim 7 is characterized in that: The motor control module also includes a resistor and an electromagnetic clutch; One end of the motor fault setting unit is connected to the positive electrode of the second DC power supply via a circuit breaker switch, and the other end is respectively connected to the motor, one end of the fourth auxiliary contact of the closing relay and one end of the fourth auxiliary contact of the opening relay, and the other end of the fourth auxiliary contact of the closing relay and the other end of the fourth auxiliary contact of the opening relay are respectively connected to the negative electrode of the second DC power supply after passing through the resistor, the electromagnetic clutch and the circuit breaker switch in sequence; One end of the coil of the motor is respectively connected to one end of the second auxiliary contact of the closing relay and one end of the third auxiliary contact of the opening relay, and the other end is respectively connected to one end of the third auxiliary contact of the closing relay and one end of the second auxiliary contact of the opening relay, and then connected to the negative electrode of the second DC power supply via a circuit breaker switch, the other end of the second auxiliary contact of the closing relay is connected to the other end of the second auxiliary contact of the opening relay, and the other end of the third auxiliary contact of the closing relay is connected to the other end of the third auxiliary contact of the opening relay; The second auxiliary contact, the third auxiliary contact and the fourth auxiliary contact of the closing relay are closed, the coil of the motor is energized in the forward direction, and the forward rotation of the motor drives the contact network switch to close; The second auxiliary contact, the third auxiliary contact and the fourth auxiliary contact of the opening relay are closed, the coil of the motor is energized in the reverse direction, and the motor reverses to drive the contact network knife to open.

9. The urban rail transit contact network switch training control circuit according to claim 2 is characterized in that: The opening and closing control module also includes an intermediate relay, and two ends of the intermediate relay are respectively connected to the positive electrode and the negative electrode of the first DC power supply through a circuit breaker switch.

10. The urban rail transit contact network switch training control circuit according to claim 1, characterized in that: The motor control module further includes a closing indicator light and an opening indicator light, wherein the closing indicator light is connected to a normally open auxiliary contact of the motor, and the opening indicator light is connected to a normally closed auxiliary contact of the motor; Among them, when the normally open auxiliary contact of the motor is closed, the closing indicator light is on, and when the normally closed auxiliary contact of the motor is opened, the opening indicator light is on.

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