RU2310251C1 - Interlocking device - Google Patents

Abstract

FIELD: electrical engineering; interlocking mechanisms; controlling electric circuits in stand-by power input systems.

SUBSTANCE: proposed mechanical circuit-breaker interlocking device has plate, bracket installed in center of plate with intermediate-size rocker-arm and two small-size ones hinged thereto, small-size rocker-arms being axle-mounted below intermediate-size one symmetrically to its fixation axis. Each rocker-arm has slits on its opposite ends with downward directed stops disposed in their bases and, consequently, in those of rocker-arms. Stops provided on opposite ends of rocker-arms are disposed at different sides of its axial line. Stops made on opposite ends of rocker-arm are likewise disposed at different sides of its axial line. Plate and bracket are provided with holes to pass stops though them and to provide their interaction with pushers and through the latter, with circuit-breaker power contacts, respectively. Intermediate-size rocker-arm stops are longer than small rocker-arms by displacement distance of respective rocker-arm fixation axes.

EFFECT: enlarged functional capabilities and application range of mechanical interlocking device, reduced size and simplified design of interlocking system.

1 cl, 6 dwg

Description

The invention relates to the field of electrical engineering, in particular to locking mechanisms, and can be used to control electrical circuits in backup power input systems.

A locking device is known, comprising a housing, a control element with pushers, a latch interacting with the control element and the contact system of the device to be locked, the control element being made in the form of a spring-loaded trapezoidal link, two pairs of pivotally connected lever and connecting rod, mounted for rotation relative to each other in a vertical plane, while the connecting rods interact with opposite sides of the trapezoidal link, pivotally connected to the latch, made in the form of a thin rod, the ends of which are installed in the housing with the possibility of reciprocating movement and alternating interaction with the contact systems of the locked devices (see application for utility model of the Russian Federation No. 2005133773 dated 01.11.05. 7 MPK Н01Н 3/20, Н01Н 9 / 24 “Locking device”.

The known interlock device used in backup power input systems with modular circuit breakers simplifies the backup power input system and reduces its dimensions, but it can only control two modular circuit breakers.

The closest in technical essence is a mechanical locking device for two circuit breakers of the backup power input system, including a plate, an arm mounted in the middle of the plate with a rocker pivotally mounted in it, provided with ends with downward-facing stops interacting with pushers, and the plate is provided with holes for interaction stops with pushers installed with the ability to interact with a locked device (see the Legrand catalog “Integrated Solutions tions for electrical and information systems ", p.30" changeover systems ", 2004

A disadvantage of the known mechanical locking device is that it is designed to control the operation of only two circuit breakers and cannot block three circuit breakers operating in the network.

When installing three circuit breakers, it is necessary to install an additional device, which generally complicates the locking system.

The technical result of the claimed invention provides for the expansion of the functionality and range of use of the mechanical locking device, reducing its size and simplifying the locking system.

The specified technical result is achieved in that the device for mechanical locking of circuit breakers, including a plate, an arm mounted in the middle of the plate with a rocker pivotally mounted therein, provided at the ends with downward-facing stops interacting with pushers, the plate is provided with openings for contact of the stops with pushers, installed with the possibility of interaction with a lockable device according to the invention, further comprises two small rocker arms, articulated They are located on the bracket below the middle beam symmetrically to the axis of its attachment, slots are made at the ends of each beam from opposite sides, at the base of which there are bent down stops that can be moved relative to the stops of the other beam, the length of the stops of the middle beam is greater than the length of the stops of small rockers by the amount of displacement of the axes of their fastening, while the plate and the bracket are provided with a central hole.

The presence of additionally installed two small rockers, pivotally located on the bracket below the middle beam symmetrically to the axis of its attachment, allows you to turn on any of the three circuit breakers, ensuring reliable locking of the other two circuit breakers, which extends the functionality of the device.

The execution of slots at the end of each rocker arm, at the base of which there are downward bent stops with the possibility of moving relative to the opposite stops of the other rocker arm, allows when two automatic stops are turned in different directions relative to the axial line of the different rocker arms to simultaneously interact with the ejector of this machine, blocking while the rests of the other ends of the rocker arm are two other circuit breakers, which simplifies the locking system and reduces the dimensions of the device.

Performing the length of the stops of the middle beam is greater than the length of the stops of the small rockers by the amount of displacement of the axes of their fastening allows you to place small rocker arms under the middle beam, which reduces the dimensions of the device, providing a compact mounting location.

No technical solutions matching the totality of essential features of the utility model have been identified, which allows us to conclude that the utility model meets the patentability condition of “novelty”.

The claimed essential features of the invention, predetermining the receipt of the specified technical result, do not explicitly follow from the prior art, which allows us to conclude that the invention meets the condition of patentability "inventive step".

The patentability condition "industrial applicability" is confirmed by the example of a specific embodiment of the mechanical locking device.

Figure 1-6 shows a device for mechanical locking:

figure 1 shows a General view of the device;

figure 2 shows the device at the time of turning on the middle circuit breaker;

figure 3 shows the device at the time of inclusion of the extreme circuit breaker;

figure 4 shows a section aa in figure 1;

figure 5 shows a section bb in figure 1;

figure 6 shows a section CC in figure 1.

The mechanical locking device of the circuit breakers includes a plate 1, a bracket 2 mounted in the middle of the plate 1, on which the middle beam 3 and two small rocker arms 4 are mounted pivotally mounted on the axes 5 below the middle beam 3 symmetrically to its mounting axis 6. At the ends of each beam 3 and 4, on the opposite sides, slots 7 are made, at the base of which the stops 8 and 9 are directed, respectively, of the rocker arm 3 and 4. The stops 8, made at different ends of the rocker arm 3, are located on different sides us from its centerline. Similarly, the stops 9, made at different ends of the beam 4, are located on different sides from its center line. The plate 1 and the bracket 2 are provided with holes 10 for passage of the stops 8 and 9 through them when interacting with the pushers 11, 12 and 13, and through them with the power contacts (not shown in the drawing) of the circuit breakers 14, 15, 16, respectively. The length of the stops 8 of the middle rocker 3 is greater than the length of the stops 9 of the small rocker arms 4 by the amount of displacement of the axes 5 and 6 of the mounting of the corresponding rocker arms.

The mechanical locking device operates as follows.

When the mechanical locking device is operating, the stops 8 and 9 in a certain sequence through the holes 10 of the plate 1 interact with the pushers 11, 12 and 13 mounted on the circuit breakers 14, 15 and 16.

When the circuit breaker 14 is turned on, the power contacts of the latter push the pusher 11, which acts on the stops 8 and 9, respectively, of the middle beam 3 and the small beam 6. The beam 3 and 6 are rotated on the axes 5 and 6 of the bracket 2. At the same time, the other shoulders of these rockers together with the stops 8 and 9 fall down and through the holes 10 in the plate 1 act on the pushers 12 and 13 of the circuit breakers 15 and 16, disconnecting their power contacts and blocking the inclusion of these circuit breakers.

When you turn on the circuit breaker 15, the pusher 12 mounted on this circuit breaker pushes the stops 9 of the small rocker arms 4. The shoulders of these rocker arms rise up, while the other shoulders of the small rocker 4 are lowered and the stops 9 act on the plungers 11 and 13, which disconnect the power contacts of the automatic switches 14 and 16, blocking their inclusion.

When turning on the circuit breaker 16, the pusher 13 of this switch pushes the stops 8 and 9, respectively, of the small and medium rocker arms 3 and 4. The other shoulder of the middle rocker 3 goes down and acts by the stop 8 on the plunger 11 of the circuit breaker 14, blocking its inclusion. And the other shoulder of the small rocker arm 4 lowers down and acts by the emphasis 9 on the pusher 12, which disconnects the power contacts of the circuit breaker 15, blocking its inclusion.

Thus, when one circuit breaker is turned on, the other two are always in a locked state.

Claims (1)

A mechanical locking device for circuit breakers, including a plate, an arm mounted in the middle of the plate with a rocker pivotally mounted in it, provided with ends with downward-facing stops interacting with pushers, the plate being provided with holes for contacting the stops with pushers installed to interact with a locking device , characterized in that it further comprises two small rocker arms pivotally mounted on an arm below the middle rocker arm sim axially its fastening axes, slots are made on the ends of each rocker arm from opposite sides, at the base of which there are bent down stops that can be moved relative to the stops of the other rocker arm, the length of the middle rocker arm stops is longer than the length of the small rocker arm stops by the amount of displacement of the axes of their mounting while the plate and bracket are provided with a Central hole.

Images