Isolation switch control system detection device

Abstract

The utility model discloses a detection device for an isolating switch control system, and relates to the railway equipment detection technology. Comprising a main control unit, and a control output unit and a plurality of signal acquisition units which are electrically connected with the main control unit. Wherein the signal acquisition unit is used for measuring circuit nodes of a control loop in an electric mechanism box; the control output unit is used for collecting the resistance value of a control loop in the electric mechanism box and transmitting the resistance value to the main control module, and the main control module can judge whether the opening / closing coil in the electric mechanism box is damaged or not and whether the limiting switch breaks down or not according to the resistance value of the control loop. According to the utility model, simultaneous detection of the opening / closing loop and a plurality of circuit nodes in the control loop is realized, the maintenance operation time is shortened, and the detection efficiency is improved, so that the skylight time is utilized to the maximum extent.

Description

Technical Field

[0001] The utility model relates to a railway equipment detection technology, and more specifically, to a detection device for an isolating switch control system. Background Art

[0002] The isolating switch is a common segmentation isolation device in railway traction power supply. It is an indispensable link in ensuring the normal power outage of railway lines, especially the contact network phase isolating switch. At the critical moment, it is required to be able to close the switch quickly so as to realize cross-regional power supply through the contact network phase isolating switch and shorten the impact time of power outage.

[0003] The isolating switch control system consists of four main parts: the dispatching main station, the monitoring screen inside the station, the monitoring substation box, and the electric mechanism box. The dispatching main station is used for the dispatcher to issue remote control operation instructions. After receiving the instructions from the dispatching end, the monitoring screen inside the station distributes the remote control instructions to the corresponding isolating switch substation monitoring box. Finally, the substation monitoring box that receives the instructions executes the opening and closing output actions to make the electric mechanism box perform opening and closing according to the instructions.

[0004] like Figure 1 The following is a common control circuit diagram of an electric mechanism box. In the figure, SS4 and SS5 are manual opening and closing buttons; SS1 is a remote and local transfer switch; K1 and K2 are opening and closing contactor coils; SS2 is an opening limit switch (i.e., the control circuit is disconnected when the opening is in place); SS3 is a closing limit switch. Generally speaking, the contactor resistance is between 500-900 ohms. If the resistance is too small, it means that the contactor is damaged such as a short circuit. If the resistance is too large, the coil is open or other node switches are disconnected.

[0005] At present, the detection of the disconnector control system mainly relies on manual practical detection tools to measure and record the resistance of the opening / closing circuit and its key circuit nodes in the control circuit one by one. However, the secondary terminals of the electric mechanism box are many and relatively complex, and it takes a lot of time to detect the fault, which will cause the operation to consume too much time. Utility Model Content

[0006] The technical problem to be solved by the utility model is to provide a detection device for an isolating switch control system in view of the deficiencies in the prior art, thereby effectively improving the detection efficiency.

[0007] The utility model discloses a detection device for an isolating switch control system, comprising a main control unit, a control output unit electrically connected to the main control unit, and a plurality of signal acquisition units;

[0008] The control output unit includes an operational amplifier U2, a second transistor Q2, a first switch S1, a second switch S2 and a fourth switch S4; one end of the first switch S1 is electrically connected to the positive input end of the operational amplifier U2 through a twelfth resistor R12, and the other end of the first switch S1 is a first opening and closing access end; one end of the second switch S2 is a common access end, and the other end of the second switch S2 is grounded; a third switch S3 is connected between the first switch S1 and the second switch S2; one end of the fourth switch S4 is a second opening and closing access end, and the fourth switch S4 The other end of the fourth switch S4 is electrically connected to the reverse input end of the operational amplifier U2 through a thirteenth resistor R13, one end of the fourth switch S4 connected to the reverse input end of the operational amplifier U2 is electrically connected to the drain of the second transistor Q2, the source of the second transistor Q2 is grounded, and the gate of the second transistor Q2 is electrically connected to the output end of the main control unit through a sixteenth resistor R16; the reverse input end of the operational amplifier U2 is electrically connected to its output end through a fourteenth resistor R14, and the output end of the operational amplifier U2 is also electrically connected to the first signal acquisition end of the main control unit through a fifteenth resistor R15;

[0009] The signal acquisition unit includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5; one end of the third resistor R3 is electrically connected to one end of the fifth resistor R5, and the connection end of the third resistor R3 and the fifth resistor R5 serves as the input end of the signal acquisition unit; the other end of the fifth resistor R5 is electrically connected to the level acquisition end of the main control unit, the other end of the third resistor R3 is grounded through the fourth resistor R4, and the connection end of the third resistor R3 and the fourth resistor R4 is electrically connected to the resistance value acquisition end of the main control unit.

[0010] Optionally, a connection end between the first switch S1 and the twelfth resistor R12 is electrically connected to a power supply through an eleventh resistor R11.

[0011] Optionally, the signal acquisition unit also includes a first resistor R1, a second resistor R2 and a first transistor Q1; the connection end of the third resistor R3 and the fifth resistor R5 is connected to a power supply through the first resistor R1, the drain of the first transistor Q1 is connected to the connection end of the third resistor R3 and the fifth resistor R5, the source of the first transistor Q1 is grounded, and the gate of the first transistor Q1 is electrically connected to the control output end of the main control unit through the second resistor R2.

[0012] Optionally, the fourth resistor R4 is connected in parallel with a second capacitor C2.

[0013] Optionally, a first capacitor C1 is electrically connected between the drain and the source of the first transistor Q1.

[0014] Optionally, the main control unit is electrically connected to a wireless communication unit.

[0015] Optionally, the main control unit is electrically connected to a human-computer interaction unit.

[0016] Beneficial Effects

[0017] The advantages of the utility model are that through the setting of a main control unit and a control output unit electrically connected to the main control unit and multiple signal acquisition units, simultaneous detection of the opening / closing circuit and multiple circuit nodes in the control circuit is achieved, thereby shortening the maintenance operation time and improving the detection efficiency, so as to maximize the use of the window time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a common electric mechanism box control circuit diagram;

[0019] Figure 2 This is a schematic diagram of the framework structure of the detection device of the utility model;

[0020] Figure 3 This is a circuit diagram of a power supply unit of the utility model;

[0021] Figure 4 This is the circuit diagram of the signal acquisition unit of the utility model;

[0022] Figure 5 This is a circuit diagram of the control output unit of the utility model. DETAILED DESCRIPTION

[0023] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.

[0024] See also Figure 2-Figure 5 The utility model discloses a detection device for an isolating switch control system, comprising a power supply unit, a main control unit, a signal acquisition unit electrically connected to the main control unit, a control output unit, a wireless communication unit and a human-computer interaction unit.

[0025] Among them, the circuit structure of the power supply unit is as follows Figure 2As shown, it supplies power to the entire detection device. The signal acquisition unit can measure the circuit nodes of the control loop in the electric mechanism box, including level value measurement and loop resistance value measurement. The control output unit is used to collect the resistance value of the control loop in the electric mechanism box and transmit it to the main control module. The main control module can determine whether the opening / closing coil in the electric mechanism box is damaged and whether the limit switch is faulty based on the resistance value of the control loop. The wireless communication unit is used to send the judgment result to the customer terminal, such as a mobile phone. The human-computer interaction unit is an OLED or IPS touch screen, which is used to display the judgment result. The main control module can adopt a control circuit based on a single-chip microcomputer, which and the wireless communication unit are both existing technologies.

[0026] In order to measure the circuit nodes of the control loop in the electric mechanism box, the signal acquisition unit of this embodiment includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5 and a first transistor Q1. One end of the third resistor R3 is electrically connected to one end of the fifth resistor R5, and the connection end of the third resistor R3 and the fifth resistor R5 is used as the input end of the signal acquisition unit and is connected to the circuit node during measurement. The other end of the fifth resistor R5 is electrically connected to the level acquisition end of the main control unit, the other end of the third resistor R3 is grounded through the fourth resistor R4, and the connection end of the third resistor R3 and the fourth resistor R4 is electrically connected to the resistance value acquisition end of the main control unit. The fourth resistor R4 is connected in parallel with a second capacitor C2. The connection end of the third resistor R3 and the fifth resistor R5 is connected to a power supply through the first resistor R1, the drain of the first transistor Q1 is connected to the connection end of the third resistor R3 and the fifth resistor R5, the source of the first transistor Q1 is grounded, and the gate of the first transistor Q1 is electrically connected to the control output end of the main control unit through the second resistor R2. A first capacitor C1 is electrically connected between the drain and the source of the first transistor Q1.

[0027] Among them, the main control module collects the level of the circuit node through the fifth resistor R5 to identify the high / low level of the circuit node, that is, whether the circuit node has a signal generated. The third resistor R3 and the fourth resistor R4 are used to collect the voltage value applied to the circuit node. The first resistor R1 is a pull-up resistor, and the first transistor Q1 is used as a switch tube. By controlling the first transistor Q1, the signal acquisition unit can generate an analog electrical signal, which can be used in the scene where the control loop is not powered on, and is used to simulate the output electrical signal of the circuit node.

[0028] like Figure 5As shown, in order to collect the resistance value of the control loop in the electric mechanism box, the control output unit of the utility model includes an operational amplifier U2, a second transistor Q2, a first switch S1, a second switch S2 and a fourth switch S4. One end of the first switch S1 is electrically connected to the positive input end of the operational amplifier U2 through the twelfth resistor R12, and the other end of the first switch S1 is the first opening and closing access end; one end of the second switch S2 is the common access end, and the other end of the second switch S2 is grounded, and a third switch S3 is connected between the first switch S1 and the second switch S2; one end of the fourth switch S4 is the second opening and closing access end, and the other end of the fourth switch S4 is electrically connected to the reverse input end of the operational amplifier U2 through the thirteenth resistor R13, and one end of the fourth switch S4 connected to the reverse input end of the operational amplifier U2 is electrically connected to the drain of the second transistor Q2, the source of the second transistor Q2 is grounded, and the gate of the second transistor Q2 is electrically connected to the output end of the main control unit through the sixteenth resistor R16; the reverse input end of the operational amplifier U2 is electrically connected to its output end through the fourteenth resistor R14, and the output end of the operational amplifier U2 is also electrically connected to the first signal acquisition end of the main control unit through the fifteenth resistor R15.

[0029] The first opening and closing access terminal and the second opening and closing access terminal are respectively connected to the two opening terminals or closing terminals of the control circuit, and the common terminal access terminal is connected Figure 1 When the control output unit is used as control output, Figure 5 The switches S1, S2, and S4 in the control circuit are all disconnected, and the third switch S3 is closed to turn on the opening circuit or the closing circuit in the control circuit; when the control output unit collects the resistance of the opening circuit or the closing circuit in the control circuit, the switches S1, S2, and S4 are closed, and the third switch S3 is disconnected, and the resistance of the contactor coil in the opening circuit or the closing circuit can be measured. Specifically, after the main control module controls the second transistor Q2 to turn on, the equivalent resistance of the contactor coil when closing the circuit and R11 form a voltage divider circuit, and the equivalent resistance of the contactor coil when closing the circuit can be obtained after passing through the operational amplifier U2.

[0030] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A detection device for an isolating switch control system, characterized in that: It includes a main control unit, a control output unit electrically connected to the main control unit, and a plurality of signal acquisition units; The control output unit includes an operational amplifier U2, a second transistor Q2, a first switch S1, a second switch S2 and a fourth switch S4; one end of the first switch S1 is electrically connected to the positive input end of the operational amplifier U2 through a twelfth resistor R12, and the other end of the first switch S1 is a first opening and closing access end; one end of the second switch S2 is a common access end, and the other end of the second switch S2 is grounded; a third switch S3 is connected between the first switch S1 and the second switch S2; one end of the fourth switch S4 is a second opening and closing access end, and the fourth switch S4 The other end of the fourth switch S4 is electrically connected to the reverse input end of the operational amplifier U2 through a thirteenth resistor R13, one end of the fourth switch S4 connected to the reverse input end of the operational amplifier U2 is electrically connected to the drain of the second transistor Q2, the source of the second transistor Q2 is grounded, and the gate of the second transistor Q2 is electrically connected to the output end of the main control unit through a sixteenth resistor R16; the reverse input end of the operational amplifier U2 is electrically connected to its output end through a fourteenth resistor R14, and the output end of the operational amplifier U2 is also electrically connected to the first signal acquisition end of the main control unit through a fifteenth resistor R15; The signal acquisition unit includes a third resistor R3, a fourth resistor R4, and a fifth resistor R5; one end of the third resistor R3 is electrically connected to one end of the fifth resistor R5, and the connection end of the third resistor R3 and the fifth resistor R5 serves as the input end of the signal acquisition unit; the other end of the fifth resistor R5 is electrically connected to the level acquisition end of the main control unit, the other end of the third resistor R3 is grounded through the fourth resistor R4, and the connection end of the third resistor R3 and the fourth resistor R4 is electrically connected to the resistance value acquisition end of the main control unit.

2. A detection device for an isolating switch control system according to claim 1, characterized in that: The connection end between the first switch S1 and the twelfth resistor R12 is electrically connected to a power supply through the eleventh resistor R11.

3. The detection device for isolating switch control system according to claim 1, characterized in that: The signal acquisition unit also includes a first resistor R1, a second resistor R2 and a first transistor Q1; the connection end of the third resistor R3 and the fifth resistor R5 is connected to a power supply through the first resistor R1, the drain of the first transistor Q1 is connected to the connection end of the third resistor R3 and the fifth resistor R5, the source of the first transistor Q1 is grounded, and the gate of the first transistor Q1 is electrically connected to the control output end of the main control unit through the second resistor R2.

4. The detection device for isolating switch control system according to claim 1, characterized in that: The fourth resistor R4 is connected in parallel with the second capacitor C2.

5. The detection device for isolating switch control system according to claim 3, characterized in that: A first capacitor C1 is electrically connected between the drain and source of the first transistor Q1.

6. The detection device for isolating switch control system according to claim 1, characterized in that: The main control unit is electrically connected to a wireless communication unit.

7. The detection device for isolating switch control system according to claim 1, characterized in that: The main control unit is electrically connected to the human-machine interaction unit.

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