Switchover unit. RU patent 2517357.

FIELD: electricity.

SUBSTANCE: switchover unit contains a source of control signal, an actuator electromagnetic relay, two control electromagnetic relays with a group of changeover contacts which control circuits are connected to buses of the respective data channels, a capacitor and a resistor.

EFFECT: simplification and reliability improvement due to increase of cut-off accuracy of the actuator relay.

1 dwg

The invention relates to the field of automation and can be used in devices that ensure the safety of technological processes, in particular when managing the movement of trains.

Famous block of conformity containing three groups relays, power supply and logic, formed by relay contacts first and second groups, through which included the relay coil third group (A.A. Leonov "maintenance of automatic locomotive alarm" M, Transport, 1974, s. RIS). The disadvantage of the device is the possibility of uncontrolled hazardous refusal, for joining relay contacts first and/or second groups, which relays the third group may give a false signal retention under the current in the absence of compliance relay status first and second groups.

Known devices the closest to the essential features of the present invention is a block of conformity containing three groups relays, power supply and logic, formed by relay contacts first and second groups, through which in series with the source supply is turned on, the relay coil third group, one pole of the power source is connected to the switching contact of the first relay the first group, trailing first contacts relay the first and second groups are United among themselves through the first conductor, the changeover contacts second relay the first and second groups connected to a NC contacts first relay their groups, trailing contacts are connected via a second Explorer, change-over contact first relay second group are connected to the same conclusion winding relay, another conclusion which is connected to another pole of the power source, the generator output frequency control signal via LC filter and rectifier is connected to the coil, control relays, between General points no contacts first and second relay the first and second groups included the trigger, whose input is via a second conductor is connected with the output of the generator, the output trigger through the first conductor is connected to the input LC filter (SU 864574, H03K 19/24, 15.09.81).

The lack of known devices used to control valves deceleration in the means of train control, is the difficulty and lack of reliability, due to the presence of additional control elements, such as a generator, LC filter with significant weight and dimensions, and a trigger.

The technical result of the invention consists in simplifying and increasing the reliability of the device.

The technical result is achieved by the fact that in the switch unit containing the source control signal, Executive electromagnetic relay and two governors electromagnetic relays with a group switching contacts, control circuits are connected to the tyres of appropriate channels of information entered capacitor and the resistor, and the first output capacitor, the first conclusion of the winding Executive electromagnetic relays and the first free output connected in series winding control relays connected to the first source output control signal, the second output of which is connected to the closing contact first group switching contacts first control relay change-over contact which is connected with change-over contact, the first group switching contacts second control relay, normally closed contact is connected with normally open contact of the second group switching contacts first control relay change-over contact which is connected to the second output of the source control signal, closing contact which is connected to the first output of the resistor, the second output of which is connected with make contact second group switching contacts second control relay, normally closed contact, which is connected with normally open contact of the first group switching contacts second control relay, normally open contact which connected to the second output winding Executive electromagnetic relays and switching contact of the second group switching contacts second control relays also to the second output capacitor and the second free output connected in series winding control relays.

The drawing shows the scheme proposed switch unit.

Switching unit contains source 1 control signal, Executive electromagnetic relay 2 and two control solenoid relay 3 and 4 with that group switching contacts, control circuits of control of electromagnetic relay 3 and 4 are connected to the tyres of the respective channels 5 and 6 of the information, first of output capacitor 7, the first conclusion of the winding Executive electromagnetic relay 2 and the first free output connected in series winding control relay 3 and 4 are connected to the first output of channel 1 control signal, the second output of which is connected to the closing contact first group 8 switching contacts first control relay 3, change-over contact which is connected with change-over contact, the first group 9 switching contacts second control relay 4, and the break contact is connected with normally open contact of the second group 10 switching contacts first control relay 3, change-over contact which is connected to the second output of the source control signal 1, make contact which is connected to the first output of the resistor 11, the second output of which is connected with make contact second group of 12 switching contacts second control relay 4, the break contact which is connected with normally open contact of the first group 9 switching contacts second control relay 4, closing contact which is connected to the second output winding Executive electromagnetic relay 2 and switching contact of the second group of 12 switching contacts second control relay 4 - to the second output capacitor 7 and the second free output connected in series winding control relay 3 and 4. As Executive electromagnetic relay 2 can be used electro-pneumatic valve (EPA) in a typical control system by train CLUB-(EN 2398698), in which the input of the amplifier EPA connected to the output of safe control circuit, the input of which is connected to the modules of Central information processing. The power switch is as follows.

In the original state of the device, the voltage on the capacitor 7 and consistently connected winding control relay 3, 4 goes through normally closed contacts groups of 10, 8 and 9, 12 switching contacts from source 1 control signal and the capacitor 7 charged to a voltage source, which is not enough to trigger control relay 3, 4, even at the maximum voltage at the terminals of the 1 source control signal, which is sufficient for operation and retain Executive electromagnetic relay 2. When signals to allow switching solenoid relay 2 of the corresponding channel 5, 6 information on the control circuit control solenoid relay 3, 4 is triggering these relays. If the level output voltage source 1 control signal corresponds to the resolution on the inclusion of Executive electromagnetic relay 2 (electro-pneumatic valve EPA), it is enabled through the closed trailing contacts first groups 8, 9 governing electromagnetic relay 3, 4. At the same time closed circuit retain control relay 3, 4 current in their windings in parallel which is switched capacitor 7, which includes closed contacts second groups of 10, 12 switching contacts control relay 3, 4 and resistor 11. This ensures retention of governors of the electromagnetic relay 3, 4 switched on after the disappearance of signals to allow switching solenoid relay 1 of the corresponding channel 5, 6 information. The resistor value 11 is set such that the voltage windings of governors of the electromagnetic relay 3, 4 and condenser 7 provides disabling control of electromagnetic relay 3, 4 when the level output voltage source 1 control signal, corresponding to a signal Executive electromagnetic relay 2 (electro-pneumatic valve EPA).

In the proposed switch unit as managers of electromagnetic relay 3, 4 can be applied to the relay, with small size, fixed return factor and high reliability in the conditions of work in on-Board equipment of train control. This increases the security of the functioning of the safety oversight system (SKB), as the Executive management of the electromagnetic relay 2 (valve EPA) becomes more sensitive to decrease the voltage at the power supply, and therefore more reliable work out situations that cause a decrease output voltage source 1 control signal EPA, more reliable off EPA with autogeneration transistor amplifier circuits of the amplifier EPA, or cascades security schemes safety control SKB in all range of operating voltages locomotive battery power. The property of self-sticking and welding of contacts in the proposed switch unit due to the fact that when sticking of contacts of governors of the electromagnetic relay 3 or 4 fault is detected when trying the next power-Executive electromagnetic relay 2 (EPA), as the chain holding relay 3 or 4 contains resistor 11, do not give this relay to cambiocavallo on.

Switching unit that contains the source control signal, Executive electromagnetic relay and two governors electromagnetic relays with a group switching contacts, control circuits are connected to the Shin appropriate channels of information, characterized in that it introduced the capacitor and the resistor, and the first output capacitor, the first conclusion of the winding Executive electromagnetic relays and the first free output connected in series winding control relays connected to the first source output control signal, the second output of which connected to the closing contact first group switching contacts first control relay change-over contact which is connected with change-over contact, the first group switching contacts second control relay, normally closed contact is connected with normally open contact of the second group switching contacts first control relay change-over contact which is connected to the second output of the source control signal, closing contact which is connected to the first output of the resistor, the second output of which is connected with make contact second group switching contacts the second control relay, normally closed contact, which is connected with normally open contact of the first group switching contacts second control relay, normally open contact which is connected to the second output winding Executive electromagnetic relays and switching contact of the second group switching contacts second control relays also to the second output capacitor and the second free output connected in series winding control relays.