CN2154490Y

CN2154490Y - Electricity leakage alarm recording instrument for railway passenger tain

Info

Publication number: CN2154490Y
Application number: CN 93205524
Authority: CN
Inventors: 蒋雅生
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-13
Filing date: 1993-03-13
Publication date: 1994-01-26
Anticipated expiration: 2003-03-13

Abstract

The utility model provides an electricity leakage alarm recording instrument for railway passenger trains, and the utility model is used for monitoring the insulation condition of a DC power supply system of passenger trains. The utility model is characterized in that the utility model is composed of a reference circuit, a positive-negative sampling circuit, a comparator, an acoustic-optical alarm circuit, a positive-negative electricity leakage signal recording device and a working electrical source. The reference voltage and the signal voltage of the utility model are designed to fluctuate along with the voltage of the passenger trains in order to satisfy the voltage of the railway passenger trains to fluctuate between 40 volts and 65 volts. The recording instrument not only gives an alarm when the passenger trains has electricity leakage, but also does not influence examiners to use examining lamps to examine insulation in the non-cut-off condition, and after a fire happens, the recording instrument can record and provide the information that whether the electricity leakage happens and when the electricity leakage happens.

Description

Electricity leakage alarm recording instrument for railway passenger tain

The utility model relates to a kind of insulation monitoring device of passenger train DC power-supply system, particularly a kind of passenger train leakage-current alarm registering instrument.

At present, the passenger train of China more than 95% adopts 48 volts of voltage systems of direct current, stops by storage battery power supply, and driving is by generator powered.Voltage floats between the 40-65 volt.After passenger vehicle enrolled train, it is in parallel that each electric power system is generally full row.Past measurement passenger train insulation one is to use the 48V8W lamp test, and sunny day is not as the criterion so that filament is red, and the rainy day does not work with filament and is as the criterion; The 2nd, use reometer, the sunny day leakage current must not be greater than 30MA, and the rainy day must not be greater than 60MA.Because people can not measure all the time, so, catch fire because of positive and negative line electric leakage often, burn passenger vehicle.And not only leak electricity short-circuit can cause and catches fire, by catching fire of causing of other reason and can cause wire short-circuiting.After passenger vehicle caught fire in the past, electric wire was burnt naked being sticked together, and was that short circuit causes and catches fire or fire causes that short circuit has no data available.

At present, the leakage alarm that occurs on the market is used for exchanging more.The Chinese patent notification number is that CN106260's " leakage-detector for DC-grounded " and Chinese patent notification number is that " multifunction insulating monitor " of CN106494 is though can be used for direct current, but incompatibility passenger train, its reason is that in these two kinds any one is if be contained on the passenger vehicle, under the situation of not shutting down, when the maintainer that respectively stands checks with the leak test lamp, will constitute the loop on the way again, make filament shinny, cause the illusion of train electric leakage, make troubles to use.

The purpose of this utility model is a kind of passenger train leakage-current alarm registering instrument that provides at above deficiency, and it not only can be reported to the police when passenger vehicle leaks electricity, and does not also influence the maintainer insulate with the test lamp inspection under the situation of not shutting down.Can also write down and provide after the breaking out of fire whether electric leakage, the information of when leaking electricity took place.

The utility model is achieved in that passenger train leakage-current alarm registering instrument, comprises switch, and pilot lamp and reference circuit are just leaking sample circuit, the negative sample circuit that leaks, and comparer, sound light alarming circuit is just being failed to record recording device, negative error of omission recording device, working power.Wherein, reference circuit is to be in series by resistance R 1, R2, R3 and R4, resistance R 1 connects the positive pole of power supply, resistance R 4 connects the negative pole of power supply, just leaking sample circuit is in series by diode D1, inductance L 3, resistance R 5, R6 and potentiometer W1, the positive pole of diode D1 connects car body (RO), potentiometer W1 connects the negative pole of power supply, capacitor C 3, C4 are connected in the two ends of inductance L 3, negative leakage sample circuit is resistance R 7, R8, potentiometer W2 and diode D2 are in series, and resistance R 7 connects the positive pole of power supply, the negative pole of diode D2 connects car body (RO1).

The utility model can be achieved in that also to adapting to passenger train voltage and float that reference voltage, signal voltage are designed to and can float with passenger vehicle voltage between the 40-65 volt.For when not shutting down, not influencing reometer test passenger vehicle insulation or 48 volts of 8W lamp test passenger vehicle insulation, adopted the high impedance signal collection.For confirming that the passenger train fire is because of electric leakage causes or caused by other reason, design has just fails to record recording device, negative error of omission recording device.Positive and negative error of omission recording device is provided with automatic reset circuit, has electric leakage tracer signal autoclear function, and promptly after leak current fault was got rid of, electric leakage signal was preserved a period of time, can remove automatically.

Good effect of the present utility model is:

1, to have a volume little, in light weight, simple in structure, easy to maintenance for this registering instrument, advantage such as cost is low.

2, after the insulation of arbitrary lead of passenger vehicle positive-negative power line and passenger car body goes to pot, can inform in time that the staff takes measures, prevent to burn passenger vehicle because of electric leakage causes fire.

Cause of fire provides reference information if 3 breaking out of fires, this registering instrument can be analysis, so that distinguish accident responsibility.

Description of drawings:

Fig. 1 is a shape synoptic diagram of the present utility model.

Fig. 2 is a circuit block diagram of the present utility model.

Fig. 3 is circuit theory diagrams of the present utility model.

Fig. 4 is pen recorder and the automatic reset circuit schematic diagram of just leaking electricity of the present utility model.

Fig. 5 is negative electric leakage pen recorder of the present utility model and automatic reset circuit schematic diagram.

Wherein:

1, shell, 5, insurance, 6, power light, 7, just leak pilot lamp, 8, the negative pilot lamp that leaks, 9, signal lamp, 10, signal lamp, 11, alarm, 12, bolt hole, 13, lead, 14, lead, 15, lead, K1, power switch, just leak verification switch, K3, the negative verification switch that leaks at K2.

The utility model is described in further detail below in conjunction with accompanying drawing.

As shown in Figure 1, the utility model is fixed on the support of railway carriage lining by screw 12, positive source connects lead 13, power cathode connects lead 14, lead 15 connects car body, full train adorn one or more all can, if when adorning many these registering instruments, any joint passenger vehicle electric leakage in train, the registering instrument that is contained in so in other passenger vehicle will be reported to the police simultaneously.Shown in Fig. 1,2,3,4,5.After power switch K1 closure, power light D34 work, electric current is through diode D3, and inductance L 1 is to the M point.Behind inverter, export positive and negative 5 volts voltage from M point one tunnel, for comparer, sound light alarming circuit, positive and negative electric leakage pen recorder, positive and negative electric leakage pilot lamp uses; Another road (as shown in Figure 3) flows to reference circuit and the negative sample circuit that leaks.Reference circuit is to be in series by four precision resistance R1, R2, R3 and R4, when electric current flows through reference circuit, the current potential that A, B, C are 3 is supplied with four comparer IC1, IC2, IC3, IC4 as reference voltage, its input end is connected to diode D22-D27 with the same reference circuit of comparer, sample circuit is kept apart, when the supply voltage lifting, the also lifting thereupon of this current potential of 3.Leak in the sample circuit negative, electric current flow through resistance R 7, R8, potentiometer W2, diode D2 gets back to negative pole by car body (RO1).The resistance of resistance R 7, R8 and potentiometer W2 is once fixing, and when supply voltage was a certain fixed value, the current potential that E order was relevant with the size of the insulation equivalent resistance RO1 of car body.When equivalent resistance RO1 increased, current potential that F is ordered improved, when equivalent resistance RO1 reduces, and the current potential reduction that F order, the F point connects the inverting input of comparer IC3, IC4 through diode and resistance, and the current potential of ordering with reference circuit B point, A compares.When the insulation equivalent resistance RO1 between power cathode and the car body was big, the current potential that F is ordered was higher, and the inverting input current potential of comparer IC3, IC4 is higher than in-phase input end, and comparer IC3, IC4 do not overturn, and are output as electronegative potential; When equivalent resistance RO1 drops to a certain limit value, when the current potential that F is ordered is lower than B point current potential, comparer IC3 upset, output noble potential, this noble potential behind diode D18, the one tunnel through diode D29 to sound light alarming circuit, make alarm 11,

signal lamp

9,10 sends the sound and light alarm signal; The base stage that another road enters triode BG4 through diode D31, triode BG4 saturation conduction makes the negative pilot lamp 6(D33 that leaks) work.If equivalent resistance RO1 continues to descend, the current potential of ordering as F is lower than C point current potential, and comparer IC4 also overturns, the output noble potential, and this noble potential is given negative error of omission recording device through diode D20.As shown in Figure 5, negative error of omission recording device is by diode D19, quartz alarm clock ZB2, and the normally closed contact 6,8 of time relay JS2, controllable silicon SCR 3 and resistance R 25 are in series, and stabilivolt CW2 in the two ends parallel connection of quartz alarm clock ZB2.When comparer IC4 output trigger pip, controllable silicon SCR 3 conductings constitute the loop, and crystal clock ZB2 is started to work.After leak current fault was eliminated, the current potential that F is ordered raise, and sound light alarming circuit quits work, the electric leakage pilot lamp extinguishes, but the electric leakage pen recorder still works on a period of time, and when working a paragraph qualification after the time, crystal clock ZB2 sends the automatic reset circuit that the timing end signal is given the electric leakage pen recorder.The automatic reset circuit of negative error of omission recording device, be coil by time relay JS2, the normally closed

contact

3,5 of time relay JS2, controllable silicon SCR 4 and resistance R 27 series connection, the control utmost point of controllable silicon SCR 4 is through resistance R 26, and diode D21 meets the switch T that makes a noise that ends of quartz alarm clock ZB2.When the timing end signal with controllable silicon SCR 4 triggering and conducting, turn-on time relay J S2, through moving after one section time-delay, break time relay J S2 normally closed

contact

3,5 and 6,8, pen recorder quits work, simultaneously the electric signal that is write down is removed, for the work of getting ready is write down in electric leakage next time.

Shown in Fig. 1,2,3,4.Just leaking in the sample circuit, when the insulation equivalent resistance RO between positive source and the car body was big, E point current potential was lower, when RO descends, current potential that E is ordered rises, and the E point connects the in-phase input end of comparer IC1, IC2 through diode and resistance, and the A of reference circuit, B point connects inverting input, when RO descends, when the current potential that E is ordered is higher than the current potential that B orders, comparer IC2 upset, output noble potential, make sound light alarming circuit work, just leaking pilot lamp 7(D32) bright.When RO continue to descend, the current potential that E order continues to rise to when being higher than the current potential that reference circuit A orders, not only sound light alarming circuit work, but also recording device is just being failed to record in triggering, is just failing to record recording device and is starting to work.As shown in Figure 4, just failing to record recording device is by diode D12, quartz alarm clock ZB1, and the normally closed contact 6,8 of time relay JB1, controllable silicon SCR 1 and resistance R 21 series connection, stabilivolt CW1 in the two ends parallel connection of quartz alarm clock ZB1.The automatic reset circuit of just failing to record recording device is the coil by time relay JS1, the normally closed

contact

3,5 of time relay JS1, controllable silicon SCR 2 and resistance R 23 series connection, the control utmost point of controllable silicon SCR 2 are through resistance R 24, and diode D14 meets the switch T that makes a noise that ends of quartz alarm clock ZB1.Just failing to record recording device and just failing to record the principle of work of automatic reset circuit of recording device identical with the principle of work of the automatic reset circuit of negative error of omission recording device and negative error of omission recording device.

Claims

1, a kind of passenger train leakage-current alarm registering instrument comprises switch, and pilot lamp is just leaking sample circuit, the negative sample circuit that leaks, and comparer, sound light alarming circuit is just being failed to record recording device, negative error of omission recording device and working power, it is characterized in that: reference circuit is by resistance R ₁, R ₂, R ₃And R ₄Be in series resistance R ₁Connect the positive pole of power supply, resistance R ₄Connect the negative pole of power supply, just leaking sample circuit is by diode D ₁, inductance L ₃, resistance R ₅, R ₆With potentiometer W ₁Be in series diode D ₁Positive pole meet car body (R0), potentiometer W ₁Connect the negative pole of power supply, capacitor C ₃, C ₄Be connected in inductance L ₃Two ends, negative leakage sample circuit is by resistance R ₇, R ₈, potentiometer W ₂, diode D ₂Be in series resistance R ₇Connect the positive pole of power supply, diode D ₂Negative electrode meets car body (R0 ₁).

2, passenger train leakage-current alarm registering instrument according to claim 1, it is characterized in that: just failing to record recording device is by diode D12, the quartzy ZB1 that makes a noise, the normally closed contact 6,8 of time relay JS1, controllable silicon SCR 1 and resistance R 21 are in series, stabilivolt CW1 in the two ends parallel connection of quartz alarm clock ZB1, negative error of omission recording device is by diode D19, quartz alarm clock ZB2, the normally closed of time relay JS2 touches normal 6,8, controllable silicon SCR 3 and resistance R 25 are in series, and stabilivolt CW2 in the two ends parallel connection of quartz alarm clock ZB2.

3, passenger train leakage-current alarm registering instrument according to claim 1 and 2, it is characterized in that: the automatic reset circuit of just failing to record recording device is the coil by time relay JS1, the normally closed contact 3 of time relay JS1,5, controllable silicon SCR 2 and resistance R 23 series connection, the control utmost point of controllable silicon SCR 2 is through resistance R 24, diode D14 meets the switch T that makes a noise that ends of quartz alarm clock ZB1, the automatic reset circuit of negative error of omission recording device is the coil by time relay JS2, the normally closed contact 3 of time relay JS2,5, controllable silicon SCR 4 and resistance R 27 series connection, the control utmost point of controllable silicon SCR 4 is through resistance R 28, and diode D21 meets the switch T that makes a noise that ends of quartz alarm clock ZB2.

4, passenger train leakage-current alarm registering instrument according to claim 1, it is characterized in that: comparer is made up of integrated circuit (IC) 1, IC2, IC3, IC4, and its input end is connected to diode D22-D27.

5, passenger train leakage-current alarm registering instrument according to claim 1 is characterized in that: on the shell 1 of this registering instrument power switch K1 is housed, is just leaking verification K switch 2, the negative verification K switch 3 of leaking, power light 6 is just leaking pilot lamp 7, negative pilot lamp 8, signal lamp 9,10 and the alarm 11 of leaking.