Power transmission and outage safety detection protection device for power supply rail of suspension type monorail vehicle

Abstract

The utility model discloses a suspension type monorail vehicle power supply rail power transmission and outage safety detection protection device which is connected with a power supply rail and comprises a network voltage relay, a high-voltage power-on detection device, a door opening and closing detection travel switch, a red light and a green light. According to the utility model, whether the power supply rail is electrified can be detected, power supply of the power supply rail is cut off when overcurrent or short circuit of the power supply rail is detected, short circuit can be carried out on the positive electrode and the negative electrode of the power supply rail after power failure of the power supply rail, and power supply rail power-on signals can be sent to an external high-voltage power-on detection device in a high-level mode for recording. The electrified state of the power supply rail can be safely and correctly displayed, and the safety of power supply rail operators is effectively ensured.

Description

Technical Field

[0001] The utility model belongs to the field of track circuit safety detection, in particular to a power supply and power failure safety detection and protection device for a suspended monorail vehicle power supply rail. Background Art

[0002] The power rail for suspended monorail vehicles is laid out within the track beam, and the current collector is installed on the bogie. Suspended monorail vehicles are powered by a suspended power supply. The power supply station provides +DC750V and 0V DC, and the vehicle receives power from the power rail through the current collector.

[0003] When operators perform maintenance on the power rail, they need to enter the track beam. If the power rail is energized or in a state where power is easily delivered, this will seriously endanger the personal safety of the operators.

[0004] In view of this, in order to ensure the personal safety of the power supply rail operators, when the power supply rail operators enter the track beam, it is necessary to correctly indicate the current power supply rail energization status in the form of a warning light, and ensure that other personnel cannot supply power to the power supply rail after the operators enter the track beam.

[0005] The designed power rail power-on and power-off safety detection and protection device can safely and correctly display the energized status of the power rail and effectively ensure the safety of power rail operators. Therefore, how to design a power rail power-on and power-off safety detection and protection device has become a hot issue in this field. Utility Model Content

[0006] Purpose of the utility model: The purpose of the utility model is to provide a power supply and power failure safety detection and protection device for a suspended monorail vehicle power supply rail, which effectively ensures the safety of power supply rail operators.

[0007] Technical solution: The utility model is a suspended monorail vehicle power rail power supply and power failure safety detection and protection device, the safety detection and protection device is connected to the power rail, and the safety detection and protection device includes a grid voltage relay, a high-voltage power-on detection device, a door opening and closing detection limit switch, a red light and a green light;

[0008] The positive pole of the grid voltage relay is connected to a 220V power supply +, and the negative pole is connected to a 220V power supply -. The grid voltage relay includes three voltage monitoring channels, a first contact and a second contact;

[0009] The three voltage monitoring channels are connected to the power supply rail;

[0010] One end of the first contact is connected to an external power supply, and the other end is connected to a high-voltage power-on detection device;

[0011] One end of the second contact is connected to an external power supply, and the other end is connected to a door opening and closing detection travel switch, a red light and a green light respectively.

[0012] Furthermore, the three voltage monitoring channels are: V1-C: 20V-200V, V2-C: 40V-400V, V3-C: 80V-800VAC / DC.

[0013] Furthermore, a DC circuit breaker and a short-circuit switch are installed in the front-stage circuit of the power supply rail.

[0014] The utility model also discloses a detection method for a power supply and power failure safety detection and protection device for a suspended monorail vehicle power supply rail, comprising the following steps:

[0015] Step 1: When the voltage between the positive and negative poles of the power supply rail is detected to be greater than DC210V, the first contact is actuated, the high-voltage power-on detection device is connected to the external power supply, the second contact is actuated, the red light is connected to the external power supply, and the red light is on; when the voltage between the positive and negative poles of the power supply rail is detected to be less than DC200V, the first contact does not actuate, the high-voltage power-on detection device is disconnected from the external power supply, the second contact is actuated, the green light is connected to the external power supply, and the green light is on;

[0016] Step 2: When the power rail has an overcurrent or short circuit, the DC circuit breaker trips;

[0017] Step 3: When the power supply of the front-stage circuit of the power rail power safety detection device is normal, the power supply rail is cut off through the DC circuit breaker;

[0018] Step 4: When the power rail is detected to be energized, the second contact is actuated, and the red light is connected to the external power supply, and the red light is on;

[0019] Step 5: Detect that the cabinet door of the power rail power-off safety detection device is not closed, the first switch of the door opening and closing detection limit switch is closed, and the red light is on;

[0020] Step 6: Only when it is detected that the power rail is not energized and the cabinet door is closed, the second contact is actuated, the second switch of the door opening and closing detection limit switch is closed, and the green light is on;

[0021] Step 7: When the power rail is powered off, close the short-circuit switch to short-circuit the positive and negative poles of the power rail. If the power rail is abnormally powered, the DC circuit breaker will trip due to the circuit breaker.

[0022] Step 8: When the power rail is energized, the first contact is actuated, and the external high-voltage power-on detection device receives an external power supply electrical signal.

[0023] Furthermore, in step 1, when it is detected that the voltage between the positive and negative poles of the power rail is less than DC200V, the return coefficient is set to 5%.

[0024] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0025] 1) It can detect overcurrent or short circuit of the power supply rail and disconnect the power supply rail.

[0026] 2) It is possible to power off the power rail.

[0027] 3) When the power rail is detected to be energized, the red indicator light at the entrance of the track beam will light up to provide a safety warning.

[0028] 4) If the power rail power-off safety detection device detects that the cabinet door is not closed, the red indicator light at the entrance of the track beam will light up to provide a safety warning. Because the cabinet door is not closed, someone may have powered on.

[0029] 6) Only when it is detected that the power rail is not energized and the cabinet door is closed, the green indicator light at the track beam entrance will light up to provide a safety warning.

[0030] 7) After the power rail is powered off, the positive and negative poles of the power rail can be short-circuited. In this way, if someone is supplying power, the DC circuit breaker will be disconnected, which plays a safety protection role.

[0031] 8) The power-on signal of the power rail can be sent to an external high-voltage power-on detection device in a high-level manner for recording. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the circuit structure of the utility model;

[0033] Figure 2 This is the wiring diagram of the grid voltage relay. DETAILED DESCRIPTION

[0034] The technical solution of the present utility model will be further described below with reference to the accompanying drawings.

[0035] The utility model relates to a power supply and power failure safety detection and protection device for a suspended monorail vehicle, which is connected to the power supply rail and includes a network voltage relay, a high-voltage power-on detection device, a door opening and closing detection limit switch, a red light and a green light;

[0036] The grid voltage relay detects whether the power rail is energized. The selected grid voltage relay has three voltage monitoring channels, one of which can be selected based on the actual voltage level. Based on the power rail voltage level, select the third voltage monitoring channel and set the threshold to DC210V (adjustable).

[0037] like Figure 1 shown.

[0038] 1) When the voltage between the positive and negative poles of the power supply rail is detected to be greater than DC210V, the relay contacts are activated and contacts 25, 28 and 15, 18 are closed.

[0039] When it is detected that the voltage between the positive and negative poles of the power supply rail is less than DC200V (the return coefficient is set to 5%), the relay contacts do not operate, and contacts 25, 26 and 15, 16 are closed.

[0040] 2) When the power rail has an overcurrent or a short circuit, the DC circuit breaker F1 trips.

[0041] 3) When the power supply of the front-stage circuit of the power supply rail power safety detection device is normal, the power supply rail can be cut off through the DC circuit breaker F1.

[0042] 4) The power rail is detected to be energized, grid voltage relay contacts 15 and 18 are closed, and the red warning light is on.

[0043] 5) It is detected that the cabinet door of the power supply rail power-off safety detection device is not closed, the B1 switch door detection limit switch contacts 1 and 2 are closed, and the red warning light is on.

[0044] 6) Only when it is detected that the power supply rail is not energized and the cabinet door is closed, the grid voltage relay contacts 15 and 16 are closed, and the door opening and closing detection limit switches 3 and 4 are closed, the green warning light will turn on.

[0045] 7) When the power rail is powered off, in order to further ensure the safety of the power rail operators, the short-circuit switch S1 is closed to short-circuit the positive and negative poles of the power rail. In this way, if the power rail is abnormally powered, the DC circuit breaker F1 will be tripped due to the circuit breaker.

[0046] 8) When the power rail is energized, the grid voltage relay contacts 25 and 28 are closed, and the external high voltage power-on detection device receives the AC220V electrical signal.

Claims

1. A power supply and power failure safety detection and protection device for a suspended monorail vehicle, wherein the safety detection and protection device is connected to the power supply rail and is characterized in that: The safety detection and protection device includes a grid voltage relay, a high voltage power-on detection device, a door opening and closing detection limit switch, a red light and a green light; The positive pole of the grid voltage relay is connected to a 220V power supply +, and the negative pole is connected to a 220V power supply -. The grid voltage relay includes three voltage monitoring channels, a first contact and a second contact; The three voltage monitoring channels are connected to the power supply rail; One end of the first contact is connected to an external power supply, and the other end is connected to a high-voltage power-on detection device; One end of the second contact is connected to an external power supply, and the other end is connected to a door opening and closing detection travel switch, a red light and a green light respectively.

2. A power supply and power failure safety detection and protection device for a suspended monorail vehicle according to claim 1, characterized in that: The three voltage monitoring channels are: V1-C: 20V-200V, V2-C: 40V-400V, V3-C: 80V-800VAC / DC.

3. The power supply and power failure safety detection and protection device for a suspended monorail vehicle according to claim 1 is characterized in that: A DC circuit breaker and a short-circuit switch are installed in the upstream circuit of the power supply rail.

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