Four-wire system relay interface circuit of rail transit alternating current switch machine

Abstract

The invention innovatively provides a four-wire system relay control circuit of a rail transit alternating current switch machine. The control circuit comprises a starting circuit and an indicating circuit, the starting circuit is used for operating the alternating-current switch machine, and the indicating circuit is responsible for collecting the state of an external turnout in real time. Compared with the conventional five-wire system relay interface circuit, the five-wire system relay interface circuit has the advantages that one core cable can be reduced, the cost is low, interference is not easy to receive, the fault rate of mixed wires is low, an outdoor point switch does not need to be connected with a high-power resistor, and wiring is simple.

Description

Technical Field

[0001] The present invention belongs to the technical field of rail transit communication signal control, and in particular relates to an interface control method for a rail transit AC switch. Background Art

[0002] The switch is the most important external equipment in rail transit, used to change the direction of the route. It is divided into DC switch and AC switch according to the working voltage. The AC switch uses an induction AC motor, which does not have a commutator and brushes, so the failure rate is low. In addition, the single-core cable has a long control distance and is widely used in urban rail transit lines.

[0003] Currently, the control of AC switch machines is done by sending control and acquisition commands to the interface circuit through interlocking. The interface circuit controls the AC switch machine through five wires. Most of the interface circuits are relay interfaces, and some use full electronic module interfaces.

[0004] The present invention innovatively proposes a method for controlling an AC switch machine by using a four-wire relay interface circuit. Summary of the invention

[0005] In order to solve the shortcomings of five-wire relay interface circuit, such as multiple wiring, high cost, easy interference, many mixed line faults, complex indoor control circuit and outdoor switch machine needs to connect resistors and high-power resistors, the present invention proposes a four-wire interface control method for AC switch machine.

[0006] The circuit of the present invention uses a safety relay for interface. Figure 1 As shown, the input of the four-wire interface circuit is the three-phase AC power supply ABC and the neutral line N, and the output is the four-wire X1, X2, X3 and X4 to the lightning protection branch cabinet, and then to the outdoor switch machine through the lightning protection branch cabinet. X1, X2, X3 and X4 are the multiplexed lines of the start and indication circuits.

[0007] The interface circuit consists of a starting circuit and an indicating circuit. The starting circuit is responsible for the operation of the switch machine and completes the conversion from positioning to reverse position and from reverse position to positioning.

[0008] The working principle of the starting circuit is as follows Figure 2 As shown: When the switch machine is operated from the positioning position to the reverse position: 1: Interlock output FCJ is excited and sucked up; 2: 1DQJ excitation suction; 1DQJF excitation suction Due to FCJ suction, 1DQJ 34 The coil is excited and attracted, 1DQJ is attracted and causes 1DQJF to be attracted, and the excitation circuit is: KZ→DGJ 11-12 →1DQJ 34 →2DQJ141-142 →FCJ 11-12 →KF As 1DQJ is excited, 1DQJF is excited. The excitation circuit is: KZ→1DQJF 1-2 →1DQJ 41-42 →FCJ 21-22 →KF 3: 2DQJ excitation polarity change As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 41-42 →2DQJ 2-1 →FCJ 11-12 →KF 4: ABC three-phase output to the motor like Figure 3 As shown: A→RD1→DBQ 31-41 →2DQJ 111-113 →1DQJF 11-12 →X2→Coil V; B→RD1→DBQ 11-21 →2DQJ 121-123 →1DQJ 21-22 →X1→Coil W; C→RD1→DBQ 51-61 →1DQJF 21-22 →X3→Coil U; N→1DQJ 12-11 →X4→Contact groups 31 and 23.

[0009] The W, U and V coils of the AC motor are energized and the motor rotates.

[0010] 5: 1DQJ and 1DQJF are autistic KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF KZ→1DQJF 3-4 →BHJ 52-51 →KF The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves row 3 and enters row 4, and continues to rotate to the reverse position under the holding action of the self-closing circuit, the moving contact in the contact group leaves row 1 and enters row 2, cutting off the self-closing circuit and the BHJ falls.

[0011] When the switch machine is operated from reverse position to positioning position: 1: Interlock output DCJ excitation pickup; 2: 1DQJ excitation suction; 1DQJF excitation suction As DCJ is attracted, the 1DQJ coil is excited and attracted, and the attraction of 1DQJ causes 1DQJF to be attracted. The excitation circuit is: KZ→DGJ 11-12 →1DQJ 3-4 →2DQJ 141-143 →DCJ 11-12 →KF KZ→1DQJF 1-2 →1DQJ 42-41 →DCJ 21-22 →KF 3: 2DQJ excitation polarity change As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 31-32 →2DQJ 3-4 →DCJ 11-12 →KF 4: ABC three-phase output to the motor like Figure 3 Shown A→RD1→DBQ 31-41 →2DQJ 111-112 →1DQJ 22-21 →X1→Coil W; B→RD1→DBQ 11-21 →2DQJ 121-122 →1DQJF 12-11 →X2→Coil V; C→RD1→DBQ 51-61 →1DQJF 22-21 →X3→Coil U; N→1DQJ 12-11 →X4→Contact groups 31 and 23.

[0012] 5: 1DQJ and 1DQJF are autistic KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF KZ→1DQJF 3-4 →BHJ 52-51 →KF The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves the 2nd row and moves into the 1st row, and continues to rotate to the position under the holding action of the self-closing circuit, the moving contact in the contact group leaves the 4th row and moves into the 3rd row, cutting off the self-closing circuit and the BHJ falls.

[0013] Indicates the circuit collects the state of the outdoor turnout and the working principle of the circuit. Figure 3 As shown: It indicates that the circuit consists of a +60V DC power supply, a current limiting resistor R, the rear contacts of 1DQJ or 1DQJF, the coil of the AC motor and the contacts of the contact group.

[0014] The current figure shows positioning, sucking up DBJ, and the excitation circuit of DBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →X3→U coil→contact group 15-16 and 13-14→V coil→X2→1DQJF 11-13 →DBJ 1-4 →2DQJ 132-131 →1DQJ 21-23 →W coil → contact group 33-34 and 31-32 → 1DQJ 11-13 →60V-.

[0015] The excitation circuit of FBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →U coil→contact group 43-44 and 41-42→W coil→1DQJ 21-23 →2DQJ 131-133 →FBJ 1-4 →1DQJF 13-11 →V coil→contact group 25-26 and 23-24→1DQJ 11-13 →60V-.

[0016] The present invention has the following beneficial effects: The present invention creatively proposes a method for controlling a switch machine using a 4-core cable in the rail transit industry, which has the following advantages: 1. Compared with the commonly used standard 5-wire AC switch control circuit, the cost is low; 2. The control circuit is simpler; 3. No need to add two pipes and resistors outdoors, but install a transformer indoors; 4. Outdoor wiring is simple; 5. Easy to maintain; 6. It is easier to judge the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 AC switch machine four-wire control principle diagram; Figure 2 Startup circuit diagram; Figure 3 Driver and presentation diagram. DETAILED DESCRIPTION

[0018] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.

[0019] The present invention adopts a four-core cable and completes the control of the rail transit AC switch machine through a rail transit dedicated relay interface control circuit. The specific implementation method is as follows.

[0020] Take the S700KC switch machine commonly used in rail transit as an example. Figure 1 As shown, it consists of a display circuit and a starting circuit, the input is four wires, namely A, B, C and N, and the output is four wires, namely X1, X2, X3 and X4.

[0021] The DCJ, FCJ, DBJ and FBJ relay models are JPXC-1000, the 1DQJ relay model is JWJXC-H125 / 80, the 1DQJF model is JWJXC-480, the BHJ relay model is JWXC-1700, and the 2DQJ relay model is JYJXC-160 / 260.

[0022] When the switch machine is operated from the positioning position to the reverse position: 1: Interlock output FCJ is excited and sucked up; 2: 1DQJ excitation suction; 1DQJF excitation suction Due to FCJ suction, 1DQJ 34 The coil is excited and attracted, 1DQJ is attracted and causes 1DQJF to be attracted, and the excitation circuit is: KZ→DGJ 11-12 →1DQJ 34 →2DQJ 141-142 →FCJ 11-12 →KF As 1DQJ is excited, 1DQJF is excited. The excitation circuit is: KZ→1DQJF 1-2 →1DQJ 41-42 →FCJ 21-22 →KF 3:2DQJ 12 Excitation pole reversal As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 41-42 →2DQJ 2-1 →FCJ 11-12 →KF 4: ABC three-phase output to the motor like Figure 3 As shown: A→RD1→DBQ 31-41 →2DQJ 111-113 →1DQJF 11-12→X2→Coil V; B→RD1→DBQ 11-21 →2DQJ 121-123 →1DQJ 21-22 →X1→Coil W; C→RD1→DBQ 51-61 →1DQJF 21-22 →X3→Coil U; N→1DQJ 12-11 →X4→Contact groups 31 and 23.

[0023] The W, U and V coils of the AC motor are energized and the motor rotates.

[0024] 5: 1DQJ and 1DQJF are autistic KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF KZ→1DQJF 3-4 →BHJ 52-51 →KF The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves row 3 and enters row 4, and continues to rotate to the reverse position under the holding action of the self-closing circuit, the moving contact in the contact group leaves row 1 and enters row 2, cutting off the self-closing circuit and the BHJ falls.

[0025] When the switch machine is operated from reverse position to positioning position: 1: Interlock output DCJ excitation pickup; 2: 1DQJ excitation suction; 1DQJF excitation suction As DCJ is attracted, the 1DQJ coil is excited and attracted, and the attraction of 1DQJ causes 1DQJF to be attracted. The excitation circuit is: KZ→DGJ 11-12 →1DQJ 3-4 →2DQJ 141-143 →DCJ 11-12 →KF KZ→1DQJF 1-2 →1DQJ 42-41 →DCJ 21-22 →KF 3: 2DQJ excitation polarity change As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 31-32 →2DQJ 3-4 →DCJ 11-12 →KF 4: ABC three-phase output to the motor like Figure 3 Shown A→RD1→DBQ 31-41 →2DQJ 111-112 →1DQJ 22-21 →X1→Coil W; B→RD1→DBQ 11-21 →2DQJ 121-122 →1DQJF 12-11 →X2→Coil V; C→RD1→DBQ 51-61 →1DQJF 22-21 →X3→Coil U; N→1DQJ 12-11 →X4→Contact groups 31 and 23.

[0026] 5: 1DQJ and 1DQJF are autistic KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF KZ→1DQJF 3-4 →BHJ 52-51 →KF The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves the 2nd row and moves into the 1st row, and continues to rotate to the position under the holding action of the self-closing circuit, the moving contact in the contact group leaves the 4th row and moves into the 3rd row, cutting off the self-closing circuit and the BHJ falls.

[0027] The working principle of the circuit is as follows Figure 3 As shown: It indicates that the circuit consists of a +60V DC power supply, a current limiting resistor R, the rear contacts of 1DQJ or 1DQJF, the coil of the AC motor and the contacts of the contact group.

[0028] The current figure shows positioning, sucking up DBJ, and the excitation circuit of DBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →X3→U coil→contact group 15-16 and 13-14→V coil→X2→1DQJF 11-13 →DBJ 1-4 →2DQJ 132-131 →1DQJ 21-23 →W coil → contact group 33-34 and 31-32 → 1DQJ 11-13 →60V-.

[0029] The excitation circuit of FBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →U coil→contact group 43-44 and 41-42→W coil→1DQJ21-23 →2DQJ 131-133 →FBJ 1-4 →1DQJF 13-11 →V coil→contact group 25-26 and 23-24→1DQJ 11-13 →60V-.

[0030] The above are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should be regarded as the protection scope of the present invention.

Claims

1. The present invention is a four-wire relay interface circuit for a rail transit AC switch, including a display circuit and a start circuit, characterized in that: Four wires are used to control the AC switch machines in urban rail transit.

2. A rail transit AC switch four-wire relay interface circuit according to claim 1, characterized in that: When the switch machine is operated from the positioning position to the reverse position: Step 1: Interlock output FCJ is excited and sucked up; Step 2: 1DQJ is excited and sucked up, and 1DQJF is excited and sucked up; Due to FCJ suction, 1DQJ 34 The coil is excited and attracted, 1DQJ is attracted and causes 1DQJF to be attracted, and the excitation circuit is: As 1DQJ is excited, 1DQJF is excited. The excitation circuit is: KZ→1DQJF 1-2 →1DQJ 41-42 →FCJ 21-22 →KF; Step 3: 2DQJ 12 Excitation polarity reversal; As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 41-42 →2DQJ 2-1 →FCJ 11-12 →KF Step 4: ABC three-phase output to the motor; A→RD1→DBQ 31-41 →2DQJ 111-113 →1DQJF 11-12 →X2→Coil V; B→RD1→DBQ 11-21 →2DQJ 121-123 →1DQJ 21-22 →X1→Coil W; C→RD1→DBQ 51-61 →1DQJF 21-22 →X3→Coil U; N→1DQJ 12-11 →X4→contact groups 31 and 23; The W, U, and V coils of the AC motor are energized, and the motor rotates; Step 5: 1DQJ and 1DQJF are self-enclosed; KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF; KZ→1DQJF 3-4 →BHJ 52-51 →KF; The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves row 3 and enters row 4, and continues to rotate to the reverse position under the holding action of the self-closing circuit, the moving contact in the contact group leaves row 1 and enters row 2, cutting off the self-closing circuit and the BHJ falls.

3. A rail transit AC switch four-wire relay interface circuit according to claim 1, characterized in that: When the switch machine is operated from reverse position to positioning position: Step 1: Interlock output DCJ is excited and sucked up; Step 2: 1DQJ is excited and sucked up, and 1DQJF is excited and sucked up; As DCJ is attracted, the 1DQJ coil is excited and attracted, and the attraction of 1DQJ causes 1DQJF to be attracted. The excitation circuit is: KZ→DGJ 11-12 →1DQJ 3-4 →2DQJ 141-143 →DCJ 11-12 →KF; KZ→1DQJF 1-2 →1DQJ 42-41 →DCJ 21-22 →KF; Step 3: 2DQJ excitation polarity change; As 1DQJ and 1DQJF are attracted, 2DQJ excitation polarity is reversed, and the excitation circuit is: KZ→1DQJF 31-32 →2DQJ 3-4 →DCJ 11-12 →KF; Step 4: ABC three-phase output to the motor; A→RD1→DBQ 31-41 →2DQJ 111-112 →1DQJ 22-21 →X1→Coil W; B→RD1→DBQ 11-21 →2DQJ 121-122 →1DQJF 12-11 →X2→Coil V; C→RD1→DBQ 51-61 →1DQJF 22-21 →X3→Coil U; N→1DQJ 12-11 →X4→contact groups 31 and 23; Step 5: 1DQJ and 1DQJF are self-enclosed; KZ→1DQJ 1-2 →BHJ 32-31 →1DQJ 32-31 →KF; KZ→1DQJF 3-4 →BHJ 52-51 →KF; The AC motor is input with three-phase electricity, the motor rotates, the moving contact of the contact group leaves the 2nd row and moves into the 1st row, and continues to rotate to the position under the holding action of the self-closing circuit, the moving contact in the contact group leaves the 4th row and moves into the 3rd row, cutting off the self-closing circuit and the BHJ falls.

4. A rail transit AC switch four-wire relay interface circuit according to claim 1, characterized in that: When the turnout is in position, the circuit is composed of a +60V DC power supply, a current limiting resistor R, the rear contacts of 1DQJ or 1DQJF, the coil of the AC motor and the contacts of the contact group. The excitation circuit of DBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →X3→U coil→contact group 15-16 and 13-14→V coil→X2→1DQJF 11-13 →DBJ 1-4 →2DQJ 132-131 →1DQJ 21-23 →W coil → contact group 33-34 and 31-32 → 1DQJ 11-13 →60V-.

5. According to claim 1, a four-wire relay interface circuit for a rail transit AC switch, characterized in that: The excitation circuit of FBJ is: 60V+→RD2→resistor R→1DQJF 21-23 →U coil→contact group 43-44 and 41-42→W coil→1DQJ 21-23 →2DQJ 131-133 →FBJ 1-4 →1DQJF 13-11 →V coil→contact group 25-26 and 23-24→1DQJ 11-13 →60V-.

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