SU873299A1 - Switching device - Google Patents

Description

(54) SWITCHING DEVICE The invention relates to automation, in particular to electrical circuit switches using step finders, and can be used in automatic control, monitoring and signaling devices. A stepper distributor is known that is made on neutral electromagnetic relays, the initial installation of which is performed by de-energizing the relay using a common reset switch. A device for the initial installation of the stepper distributor, containing a switching node for the initial installation and p remote switches, is also known. This device is equipped with a signal lamp, one output of which is connected to the power supply pole, and the other output through the closing; the contact of the switching unit of the initial installation is connected to the fixed contact and the terminal of the last winding switch, which is connected to the output through the opening contact of the switching node of the initial installation. including the first switch 2. The closest to the proposed technical essence and the achieved effect. is a device co. holding step finders, a block for the initial installation of step finders, including cells of the same type by the number of step finders and for each step finder, a separate zero return relay is provided, the winding of which is connected to the contact row lamella by means of a closing contact, defined zero position of this step finder. The winding of the zero-position relay is connected to the other lamellae of this contact relay via the open contact of the latching relay. The contact brush, row and connected to the pole of the power source through its own breaker, contacts this finder. The coil of the finder electromagnet is connected to the poles of the power source through a second disconnecting contact of the latching relay connected in series. And a closing contact of the reset switch. The return of the step finder to the zero position occurs when the return relay is on, which works with the corresponding electro-magnetism in pulsary mode. When the searcher self-sets to the zero position, the switch-on circuit of the return relay opens and the self-propelled switch stops 3 |.

The disadvantages of this zero-return device are the reduced reliability of operation due to the large number of contact connections and the complexity of the device design (especially with a large number of step finders in the devicej, since a separate electromagnetic return relay is used to set the zero position of each Iskater,

The purpose of the invention is to improve the design of the device and simplify its design.

The goal is achieved by the fact that in a switching device containing step finders there is a unit for the initial installation of step finders, which includes cells of the same type according to the number of step finders, an installation electromagnetic relay, one winding terminal of which is connected to one power bus and another through the disconnecting contact of the switching element - with a common bus, and the contacts of the specified electromagnetic relay are included in the circuits of the windings of the step finders in each of the cells, a signal lamp, one in The output of which is connected to the specified single power bus, the unit for starting the installation of the step finders is equipped with a logic circuit AND, and a transistor and a resistor are inserted into each cell, through which the base of this transistor is connected to one bus of the phages, the emitter of the specified transistor is connected to a common a busbar with a lamella of the contact range of a step finder defining the initial position of the corresponding step finder, a collector with the specified closing contact of the electromagnetic relay, which is connected in series with the contact Twice the disconnecting contact of the corresponding step finder and one of the conclusions of the winding of this step finder, another conclusion. connected to another power bus, the brush of the contact row is connected to the common bus, and the connecting point of the closing contact of the electromagnetic relay of its own disconnecting contact of the step finder is connected to the corresponding input of the logic circuit I, the output of which is connected to the other output of the specified electromagnetic relay, through the opening contact which is connected to the common

bus another pin signal lamp.

In order to set the fixed speeds of movement of the brushes of the step finders through the lamellas of their contact rows, the time specifying the HC circuit can be entered into each cell, while the capacitor of the CS chain is connected parallel to the winding and the resistor is sequentially connected with the winding of the corresponding step finder.

The drawing shows a schematic electrical diagram of the proposed device for the initial installation of step finders.

The device contains cells of the same type C-1, by the number of step finders 2, the electromagnetic relay 3 is set to the initial position, one output of the winding of which is connected to the first power supply bus 4, and the second through the break contact 5 of the switching element (not shown in the switching element) with common bus 6. The signal lamp 7 is connected to the first power bus 4 and through. break contact b of relay 3 is set to the initial position - to common bus 6, Logic circuit AND 9 is made on diodes Yu ,. Each of the cells 1 - C contains, respectively, a transistor 1C-llfi, a resistor 12p, a closing contact, 13x) - 13, a preset 3 is set to the initial position, its own normally closed contact is 14 / | .14ti step-seeker of the same cell,

15.15), second resistor

a capacitor 1 bu connected to the second power bus 17. A brush, a contact row of a step finder 2 of the same cell, is connected to a common

19. tire 6. One of the slats, namely 19v. , in contact ranges 19l, 20..

ti

connected to, 20 "П1" by the corresponding transistor of the transistor 11 - .i

Claims (3)

the incoming cell. The initial position is 2 „-in such a step finder in which. The bed is 18v, in contact with the lamella. The device operates as follows. When voltage is applied to the buses 4 and 6 of the relay 3 of the installation to the initial position, it is triggered by the disconnecting switch 5 of the switching element. Contacts 13-13 of relay 3 in each of the cells C are closed. Then the switching element (in the diagrams, the switching element is not shown) should be installed in another position, in which its contact 5 is open. Further operation of the device is determined by the positions in which the step searchers 2c are located, namely: all the step searchers Zj r (or some of them, for example 2;) and are (its) in the initial (ohm) positions (and) ; all step finders 2.-2 are already in the top positions. If the step-by-step suits2 and are not in the initial positions, the brushes are in contact with the lamellas of their contact rows, therefore the bases of the transistors 11-1 Ij are connected only to the first power supply bus 4 respectively via resistors 12. Resistors 1 2 ,, - 12 j. are calculated based on the conditions of a transistor (transistors 11 ". Consequently, the P - 11 transistors are open and their emitters and their collector currents, when contact 5 is opened, keep the relay 3 of the installation in the initial position in the actuated state. For example, the collector current of transistor 11,. flows in the following circuit: common bus 6 emitter-collector section of transistor 1 1 Q-closed contact 132 relay 3 winding - first power supply 4. Signal lamp 7 does not light up at this time, because contact 8 of relay 3 is open. power to bus 17, i.e. and applying voltage to the windings of the stepping finders 2, in the collector currents of the transistors .11.- 11 appear the components due to the currents through these windings. The installation of the stepper after searching for the initial positions takes place in the self-propelled mode. the brushes of the contact series are specified by the time of the setting RC - chains consisting of 9–15 and the resistors of the capacitors, for example, the installation of the step finder 2n in the initial position is as follows. When flowing through the winding 2 - constituting the collector current of the transistor 1 li, this stepping finder triggers by moving the brush 18.3 to the next lamella of the contact row 20/4, .., fli (j and breaking its own break contact 14p, winding power supply circuit 2 is broken and the step finder after some delay time, caused by the discharge time of the driving capacitor 15 (j, releases. The own contact 14 of the step finder is closed again, the collector current component of the transistor 11 ″ flows through the coil 2g again bathes, moving the brush 18 more than one lamella of the contact row and disrupting the contact 14,, etc. This self-propelled process continues until the next step of the step finder Z brush his 18 is installed on the slat 19j of the contact row. In this way, the base of the transistor 1 C is connected to the common bus 6 and the transistor 1 I is locked. B; the junction point of the closing contact. ISijH of the break contact 14, ji shows a high negative potential. Consequently, the diode 10 from the AND circuit. 9 is also locked. - -. Thus, when each step finder is installed, the initial-position is locked, respectively, by the transistors 10 from the logic circuit AND DIODES 9, breaking the power supply circuit of the winding of the relay 3 to the initial position; Relay 3 releases, expanding its contacts 13, -13f, stepper seekers windings 2, - 2 and contact 8 in the supply circuit of the signal lamp 7, the backlight of the signal lamp 7 indicates the installation of all step finders Zj - the initial positions. neither If all step finders 2, when contact 5 is opened, are already in the initial positions, then all transistors 1C - P are locked and the self-propelled processes described are not observed, as relay 3 releases immediately, blurring contacts 13, - 13f,. lamp 7, indicating that the installation of stepper duck finders obes-. echena. The proposed device in comparison with the known has greater reliability, simpler design and lower cost: it does not have n -1 electromagnetic relays. In addition, there is a signal that all step finders are set to their initial position. If there are not enough groups of closing contacts of one relay 3, an additional relay can be inserted into the device, the winding of which should be connected in parallel with the winding of the existing relay 3. Claim 1. The switching device containing the stepping finders, the unit for the initial installation of the stepping finders, including cells of the same type with respect to the number of step finders, the electromagnetic relay of the installation in the initial position, one output of which is connected to the first power supply bus and the other through the opening contact t of the switching element is with a common bus, and the closing contacts of the specified electromagnetic relay are included in the circuits of the windings of the step finders in each of the cells, a signal lamp, one output of which is connected to the specified single power bus, which is designed to increase the reliability of the device and simplify its design, the unit for the initial installation of the step finders is equipped with a logic circuit AND, and a transistor and a resistor are inserted into each of the cells, through which the base of this tanzistor is connected to the first power bus, emit p of said transistor 98 is connected to the common bus. the base is with a lamella of a contact row of a step finder defining the initial position of the corresponding step finder, a collector is with a specified closing contact of an electromagnetic relay, which is connected in series with its own break contact of the corresponding step finder and one of the winding terminals of this step finder, another connected terminal On the other hand, the power supply, while the brush of the contact row of the step finder is connected to the common bus, and the connection point of the specified closing contact is electromagnetic A full relay and step breaker own normally open contact is connected to the corresponding input of the logic circuit I, the output of which is connected to another winding terminal of the specified electromagnetic relay, through the opening contact of which is connected to the common bus another output of the signal lamp. 2, The device according to claim 1, wherein, in order to set fixed speeds of movement of the brushes of the step finders through the lamellas of their contact rows, the time specifying the RC chain is entered into each cell, while the BC-chain capacitor is connected in parallel and the resistor is in series with the winding of the corresponding step finder. Sources of information taken into account in the examination 1. The author's certificate of the USSR 356709, cl. H 01 H 41/00 1970. 2. USSR author's certificate number 619980, cl. H 01 H 63/36, 1978. 3. USSR author's certificate number 104178, cl. H 01 H 67/04, 1956. I I