RU48437U1 - WAY SWITCH - Google Patents

Abstract

The utility model relates to electrical products, in particular to circuit breakers, designed for remote control of electric drives of machines and mechanisms in stationary installations and on land, sea and air vehicles, where they are actuated by control stops, as well as for signaling associated with these drives , or other electrical devices. The technical result that can be achieved using the proposed utility model is reduced to high reliability against explosion, mechanical strength and the ability to provide instant contact switching in a time of not more than 0.04 seconds. The travel switch consists of a housing 1 and a cover 2 connected by screws 3 with the possibility of forming a shell, while inside the shell there is an instant contact block consisting of a housing 4 and a cover 5, made in the form of a switching device containing fixed and movable contacts 6, 7 moreover, the latter is installed in the traverse 8 and secured with a flat spring 9, a drive element consisting of a pusher 10 or a pusher 11 with a roller, or a lever 12 with a roller, a return spring 13, a drive bracket 14, a support bracket 15, the fur the switching bottom (not shown in FIG.) of the movable contact 7 and the support bracket 15. There are three inlet openings (not shown in FIG.) in the switch shell for connecting pipes or metal hoses, as well as cable entry 16 for introducing a flexible or armored cable (on Fig. not shown) and means (in Fig. not shown) from pulling out the cable.

Description

The technical field to which the utility model relates.

The utility model relates to electrical products, in particular to circuit breakers, designed for remote control of electric drives of machines and mechanisms in stationary installations and on land, sea and air vehicles, where they are actuated by control stops, as well as for signaling associated with these drives , or other electrical devices.

State of the art

Known end push-button microswitches compact sealed design with die-cast aluminum housing.

The switches are supplied with controls of various designs in housings for side or floor mounting, as well as with one or two bushings for wires of type PG 13.5, type of protection according to D / N P50 or P54 (dustproof and splashproof or respectively hermetic design) ( see BZE 7/9 and BZV 7/9 Series Pushbutton Microswitches, Honeywell Brochure, Electrical and Electronic Parts Product Overview).

The disadvantage of these push-button switches is the design complexity.

Known explosion-proof small-sized electric apparatus, which is used in electrical engineering, in control stations designed to control power receivers, mainly three-phase electric motors installed in explosive industries. The inventive apparatus contains a flameproof enclosure, a cover that is attached to bolts or threads, an input device with cable entries, at least one switching device. To reduce the size and weight, the device is equipped with at least one intrinsically safe control unit to the inputs of which a control mechanism is connected via a communication line, the sparking contacts of which do not require enclosure in an explosion-proof enclosure. According to the explosion protection condition, it is sufficient to lay the cable cores in a separate bundle and connect them to the terminal clamps of the input device, separated from the rest by an insulating partition. Depending on the version, the device is equipped with emergency protection blocks, the inputs of which are connected to information pickup sensors (see US Pat. RF No. 2028019, class N 01 N 9/04).

The disadvantage of this electrical apparatus is its low reliability.

The closest in technical essence and the achieved positive effect and accepted by the authors for the prototype is a VP15 series circuit breaker, consisting of a housing and a cover connected by screws with the possibility of forming a shell, while a contact block is located inside the shell (see the VP 15, OKP series circuit breakers 342830 TU 16-526.470-80, manufacturer: Kharkov Electric Equipment Plant).

The disadvantage of this switch is the low reliability against explosion and mechanical strength, as well as:

- low switching current I _nom - 10 A;

- the use of switching blocks of semi-instantaneous action, resulting in an increase in the response time of the switch;

- degree of protection IP 54.

Utility Model Disclosure

The technical result that can be achieved using the proposed utility model is reduced to high reliability against explosion, mechanical strength and the ability to provide instant contact switching in a time of not more than 0.04 seconds.

The technical result is achieved by means of a trip switch, which consists of a housing and a cover connected by screws with the possibility of forming a shell, while inside the shell there is a contact block, which is made in the form of a switching device containing fixed and movable contacts, the latter being mounted in a traverse and fixed flat spring, a drive element consisting of a pusher or a pusher with a roller, or a lever with a roller, a return spring, a drive bracket, a support bracket, a switching mechanism under izhnogo contact and support bracket, and the switch casing is provided with an insertion hole to couple tubes or metal hoses and cable input to input or flexible armored cable.

Brief Description of the Drawings

Figure 1 shows the switch circuit, General view.

In figure 2, too, the pusher.

In figure 3, too, the pusher with a roller.

In figure 4, too, a lever with a roller.

Utility Model Implementation

The travel switch consists of a housing 1 and a cover 2, connected by screws 3 with the possibility of the formation of a shell, while inside the shell

an instant contact block is located, consisting of a housing 4 and a cover 5, made in the form of a switching device containing fixed and movable contacts 6, 7, the latter being mounted in a traverse 8 and secured by a flat spring 9, of a drive element consisting of a pusher 10 or a pusher 11 with a roller, or lever 12 with a roller, a return spring 13, a drive bracket 14, a support bracket 15, a switching mechanism (not shown in FIG.) Of the movable contact 7 and the support bracket 15. There are three input holes in the switch shell (on Fig. not shown) for connecting pipes or metal hoses, as well as cable entry 16 for inputting a flexible or armored cable (not shown in Fig.) and means (not shown in Fig.) for pulling out the cable.

The track switch is operated as follows.

A flexible or armored cable sealed with a gland is inserted into the cable entry 16.

When the control stop acts on the drive element of the switch, for example, the pusher 10, the pusher 10 of the contact block is exposed, while the drive bracket 14, moving linearly, by means of the support bracket 15 compresses the flat springs 9, while the flat springs 9 are able to move along radii relative to the reference points (not shown in Fig.) on the traverse 8 and the supporting brackets 15 move radially relative to the reference points on the drive bracket 14. When crossing the line of points of application of compression forces I of the flat springs 9, the springs 9 under the action of elastic forces begin to move along the radii relative to the support points on the support brackets 15, while the flat springs 9, taking the form of a bend given to them by technological equipment, move the crosshead 8, closing the open fixed contacts 6 with a bridge. When the termination of the external force on the pusher 10, under the action of the return spring 13, the beam 8 takes up its original position, switching the contacts 6, 7 of the block.

The proposed utility model in comparison with the prototype and other well-known technical solutions has the following advantages:

- increased reliability against explosion;

- the ability to provide instant switching of contacts in a time of not more than 0.04 seconds, which does not cause 16 A when switching an electric arc;

- high mechanical strength.

Claims (1)

Trip switch, consisting of a housing and a cover connected by screws with the possibility of forming a shell, while a contact block is located inside the shell, characterized in that the contact block is made in the form of a switching device containing fixed and movable contacts, the latter being mounted in a traverse and fixed flat a spring, a drive element consisting of a pusher or a pusher with a roller or a lever with a roller, a return spring, a drive bracket, a support bracket, a switching mechanism of a movable contact and a support bracket, and the switch casing is provided with an insertion hole to couple tubes or metal hoses and cable input to input or flexible armored cable.