JPH03145912A - Flame-proof electric device - Google Patents

Abstract

PURPOSE: To simplify a structure by eliminating a screen between the fire-proof chamber and the fire-proof constituting chamber of a quick breaker. CONSTITUTION: A fire-proof electric device has a fire-proof introducing chamber 1 for guiding a conductor from a core 3 of a cable, a fire-proof constituting chamber 4 for accommodating a functional constituent 5 of an electric circuit, a lid 6 of the fire-proof constituting chamber, a fire-proof screen 7 between the fire-proof introducing chamber 1 and the fire-proof constituting chamber 4, a quick-acting isolator 8 with an input terminal 9 and an output terminal that are mounted to the fire-proof screen, and conductive feed-through terminals 11, 12, and 13. A fire-proof compartment 15, consisting of the fire-proof screen 7, the feed-through conductive terminals 11 and 13, and a fire-proof casing 14 accommodates the quick breaker 8.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to switchgear for controlling power distribution, and in particular to flameproof and explosion-proof electrical equipment.

The invention can be used in chemical plants and coal mines where flame or explosion hazard environments exist and can be integrated into flame-proof or explosion-proof electrical equipment such as flame-proof electromagnetic starters, automatic cut-outs, and control switches. Can be done.

[Conventional technology]

Flameproof electrical equipment, such as flameproof electromagnetic starters (“Ele-et
rlcal Equipa+ent ror the
Mining Industry, abronchre
ol' Wallace town, ” G, B,
(see pp. 3.4) are known, in which components of an electrical circuit or device, such as contactors, control and protection units, are closed with a lid that allows access to the components of the electrical circuit for maintenance and repair. It is housed in a fireproof room. The flameproof electrical installation comprises, in addition to the component chamber, two other flameproof separation chambers, namely an introduction chamber for conductors for introducing the power supply cable and a chamber suitable for accommodating interlocking disconnectors. I'm here. An interlock switch energizing or tripping mechanism is provided on the component chamber lid such that the lid can only be opened by means of a disconnect switch in the “off” state, i.e. when no voltage is applied to the functional components of the flame protection electrical equipment. Mechanically coupled.

The conductive core of the power supply cable is electrically coupled to the input terminal of the interlocking disconnector via a through conductive terminal attached to the flameproof partition between the introduction chamber and the interlocking disconnector chamber. The output terminal of the interlocking disconnector provides electrical connection to the components and electrical circuits of the flameproof electrical equipment through the through-conducting terminal attached to the flameproof partition between the flameproof room of the interlocking disconnector and the flameproof component room. is combined with

The functional components of the electrical circuit of the flameproof electrical device are electrically connected to the conductive core of the cable connecting the electrical device to the power receiver via a flameproof electrical connector housed within the flameproof component chamber.

The flameproof chamber of the interlocking disconnector is closed with a lid that allows access to this chamber from the outside for installing the disconnector, monitoring it and servicing it.

Prior art devices are complex in design, relatively large in size and weight, and complex to manufacture. This means that it is necessary to provide a through-conducting terminal in the flameproof partition between the flameproof room of the disconnect switch and the flameproof component room, and that it is necessary to provide a through-conducting terminal in the flameproof partition between the flameproof room of the disconnect switch and the flameproof component room, and that the flameproof introduction room, the flameproof room of the interlocking disconnect switch, and the flameproof It is also evident that the subsequent provision of a flame-forming chamber requires that the correspondingly spaced flame-proof partitions be provided with feed-through conductor terminals.

Additionally, flameproof and explosion-proof electrical equipment (UK Patent No. 1501)
No. 818) is known, which comprises a flame-proof introduction chamber for introducing the power supply cable, a flame-proof component chamber for accommodating the functionality of the electrical circuit of the flame-proof electrical device, and a lid of the flame-proof component chamber. , a flameproof partition separating a flameproof introduction room and a component room; a flameproof room housing an interlocking disconnector having at least one input terminal and at least one output terminal; at least one first feed-through conductive terminal for connecting the conductive core of the supply cable to the input terminal of the interlocking disconnector, electrically connecting the output terminal of the interlocking disconnector and the components of the electrical circuit housed in the flameproof configuration chamber; a biasing mechanism mechanically coupled to the interlocking disconnector, and a lid of the flameproof configuration chamber. The at least one second feed-through conductive terminal is housed in the lid of the chamber of the interlocking disconnector and serves as a flameproof partition between the flameproof chamber of the interlocking disconnector and the flameproof component chamber.

The design of the last-mentioned flameproof electrical device is also relatively complex and difficult to manufacture since it has two spaced apart partitions with through-conducting terminals. Furthermore, maintenance of the interlocking disconnect switch requires opening the lid of the flameproof introduction chamber, disconnecting the core of the power supply cable, disconnecting the conductor in the flameproofing configuration chamber from the through conductive terminal, and removing the disconnector from the chamber. , which is relatively difficult because the switch can only be accessed.

[Problem to be solved by the invention]

The present invention simplifies the structure of the flameproof electrical equipment by eliminating this partition between the flameproof chamber of the interlocking disconnector and the flameproof component chamber that carries at least one through-conducting terminal attached to the partition. , seeks to solve the problem of making a flameproof electrical device with such a structure and circuit in such a way that it is easy to manufacture.

[Means to solve the problem]

The gist of the invention consists of a flame-proof introduction chamber for the lead-in conductors and power supply cables, a flame-proof component chamber suitable for accommodating the electrical components of the electrical circuit of a flame-proof electrical device, a lid of the flame-proof component chamber; A flameproof partition that separates a flameproof introduction room and a flameproof component room, an interlocking disconnector having at least one input terminal and at least one output terminal and attached to the flameproof partition, and a conductive core of a power supply cable that conducts electricity. at least one first feedthrough conductive terminal mounted on the flameproof partition for electrically connecting through the body to the input terminal of the interlocking disconnector, to the output terminal of the interlocking disconnector and housed within the flameproof configuration chamber; at least one second feedthrough conductive terminal electrically connected to an electrical circuit component of the flameproof electrical device, an interlocking disconnector, and a biasing mechanism mechanically coupled to the lid of the flameproofing component chamber. A flame electrical device, which according to the invention further comprises:
an electrical connection between the output terminal of the interlocking disconnector and an electrical component within the fireproofing configuration room, comprising at least one third feedthrough terminal mounted in combination with the second feedthrough conductor terminal on the flameproof partition; is actuated by third and second through-hole conductive terminals connected in series, and the device is further mounted on the flameproof partition and is internally connected together with the first and second through-terminals and the flameproof partition. It has a flameproof casing that defines a flameproof component chamber that accommodates the interlocking disconnect switch.

Conveniently, the interlocking disconnector is attached to the flameproof partition by at least one conductive feedthrough terminal selected from the group comprising at least one first conductive feedthrough terminal and at least one third conductive feedthrough terminal. good.

Advantageously, the first, second and third feed-through terminals, interlocking disconnector and flameproof partition are integrated and independent assemblies.

Preferably, the flameproof partition is made of electrically insulating material and is integral with the first, second and third feedthrough terminals.

The present invention provides for all interlocking disconnectors interconnecting the introduction chamber and the component room and also interconnecting the interlocking disconnectors on one and the same flameproof partition between the flameproof introduction chamber and the flameproof component room. Prepare for installation of through conductive terminals.

According to a preferred embodiment of the invention, the structure of the device includes mounting an interlocking disconnector on the flameproof partition by means of at least one conductive feedthrough terminal, and integrating a portion of the feedthrough conductive terminal with a portion of the disconnector. This is further simplified by reducing the number of components of the device and facilitating its assembly.

Except for the necessity of assembling the feedthrough terminals and interlocking disconnectors into the disclosed flameproof electrical equipment, the feedthrough conductive terminals, interlocking disconnectors, and flameproof partitions shall be prefabricated as independent assemblies of the body. is desirable. In addition, flameproof partitions
Preferably, it is made of electrically insulating material and is integral with the insulating portion of the feedthrough terminal.

In this way, the invention simplifies the construction of flameproof electrical equipment and facilitates its fabrication.

〔Example〕

A flameproof electrical device embodying the invention houses a flameproof introduction chamber 1 (FIG. 1) for conducting conductors from a conductive core or a core 3 of a power supply cable, a functional component 5 of the electrical circuit of the flameproof electrical device. a flameproof component chamber 4 for the purpose of providing a flameproof component, a lid 6 of the flameproof component chamber, a flameproof partition 7 between the flameproof introduction chamber 1 and the component chamber 4, at least one input terminal 9 attached to the flameproof partition; an interlocking disconnector (insulator) 8 with one output terminal 10, a conductive part 11' attached to the flameproof partition 7 and for electrically connecting the power supply cable 3, the conductor 2 coming from the conductive core; at least one first feed-through conductive terminal 11-1 with at least one second feed-through conductive terminal 12 with a conductive portion 12', mounted for connection to a flameproof partition 7 supporting an interlocking disconnector 8; conductive portion 13
' has at least one through-conducting terminal 13. The output terminal 10 of the interlocking disconnector 8 is connected to the third and second
is connected to component 5 of the electrical circuit of the flameproof electrical device via a series connection of through-conducting terminals 13 and 12.

The flameproof partition 7 together with the through-conducting terminals 11.13 and the flameproof partition 7 form a flameproof casing 14 which defines a flameproof compartment 15 which houses the interlocking disconnector 8 in the western part.
is installed on top of it.

The shaft 16 of the interlocking disconnector 8 is operatively connected to a handle 17 mounted on the outside of the flameproof electrical device, and the lid 6
operatively coupled to. In the embodiment described here, the nozzle 17 and its operating connection with the shaft 16 of the interlocking disconnector 8 and the lid 6 are connected to the mechanical biasing (tripping) mechanism of the device. are divided.

The functional components 5 of the electrical circuit of the device are mounted on a panel 8 housed in the flameproof component room 4. Electric circuit components 5
are connected to the contact 19 of the connector 20 via a conductor 21 (connection wire) with a second conductive terminal, and another conductor 21' connects them to a through conductive terminal 22. However, this conductive terminal is attached to a flameproof partition that separates the flameproof component chamber 4 from a flameproof outlet chamber 24, in which the through terminal 22 is connected to the flameproof electrical device disclosed herein. is electrically connected to a conductive core 25 of a cable 26 that supplies power from component 5 of the electrical circuit to a power receiving device (not shown).

The corresponding lead-in/lead-out end portions of cables 3 and 26 are
It is sealed by a sealing ring 27 and a thrust cable sleeve 28.

In the embodiment described, the introduction flameproof room 1 has walls 2
9 and a lid 30.

The flameproof outlet chamber 24 is partitioned by a wall 31 and a lid 32. The flameproof configuration room 4 is partitioned by a wall 33 and a lid 6.

The through conductive ends 11, 12.13 are electrically connected to the terminals 9.10 of the interlocking disconnector 8 via corresponding conductors (connection wires) 34.

FIG. 1 shows a single phase flameproof electrical system embodying the invention. The polyphase flameproofing electrical device according to the invention provides an electrical path with corresponding conductive feedthroughs 11, 12 and 13, terminals 9 and 10 of interlocking disconnectors (insulators) 8, which are connected to the associated appliances of this device. Contains as many phases (poles) as there are within.

In the embodiment described, the interlocking disconnector 8 is
It is fixed by a threaded pin 35.

In a modified embodiment, the interlocking disconnector 8 (FIG. 2) is attached to the flameproof partition by means of at least one first through-conductor terminal 11 and fixed by a tightening screw 36. In this embodiment, a conductive part 11' in the form of a threaded pin receiving a tightening screw 36 is connected via a conductor 34 to an input terminal 9 of the disconnector 8. The fixed contacts 37, 38 of the disconnector 8 are connected to the input terminal 9 and the output terminal 10, respectively. The output terminal 10 is connected to the conductor 39
, a screw pin 40 with a clamping body 41, 42, and a conductor (connection wire) to the conductive part 13' of the third conductive through terminal 13. In this embodiment, an interlocking disconnector and at least one through-conducting terminal 1
The insulating part 1 is integrated.

In another embodiment of the present invention, the through conductive terminal 11 (
3), 12 and 13, the interlocking disconnector 8 and the flameproof partition 7 are integrated as an independent assembly, and the flameproof partition 7 is integrated with the insulating part of the through conductive terminal 11° 12.13. Made of electrically insulating material.

The movable contact 43 is attached to the shaft 16 of the interlocking disconnector 8 and is held down by elastic elements 44,45. The part 46.47 made of electrically insulating material is connected to the clamping body 49.50
It is held in place by a threaded pin 48 with a .

The thick weave configuration shown in FIG. 3 thus represents an integral, independent assembly of the interlocking disconnector 8, the feedthrough terminals 11, 12, 13, and the flameproof partition 7. The flameproof partition 7 and the insulating parts of the feedthrough terminals 11, 12 and 13 are made of electrically insulating material.

The disclosed flameproof (explosion-proof) electrical device, such as an explosion-proof electromagnetic starter, operates as follows. When the lid 6 (FIG. 1) is closed, the mechanical connection between the lid 16 and the handle 17 is
The handle 17 can be turned to close the electrical circuit in the interlocking disconnector 8 between the input terminal 9 and the output terminal 10. In this way, voltages are applied to the functional components 5 of the circuit of the flameproofing electrical device, which are intended for the control of the power receiving device (for example energizing and energizing the electric motor - not shown in Figure 1). be able to perform the specified functions.

When the interlocking disconnector is turned out, the handle 17 assumes a position which allows the lid 6 to be opened, allowing access to the component 5 of the electrical circuit of the flameproof electrical device described. In this operation, no voltage is applied to the feedthrough terminals 12.13 and all components contained within the flameproofing chamber 4.

In this way, the device disclosed here fulfills all the intended functions but has only one flameproof partition 7 between the flameproof introduction chamber 1 and the flameproof component chamber 4. and
The through conductive terminals 11, 12 and 13 and the interlocking disconnector 8 are placed thereon. The flameproof partition 7 has on it a flameproof casing 14 which, by means of the through-conducting terminals 11.13 and the flameproof partition 7, defines a flameproof compartment 15 in which the interlocking disconnector 8 is accommodated. This simplifies the structure of the disclosed device and facilitates its fabrication.

Furthermore, the interlocking disconnector 8, as shown in FIG. The structure is even more simplified, the assembly work of the device is reduced, and the fabrication is simplified.

Through conductive terminals 11, 12, 13, interlocking disconnectors 8, their interconnecting conductors 2, 34, and flameproof partitions 7, which are integrated into a single independent assembly as shown in FIG.
and also the flameproof partition 7 and the through-conducting terminals 11, 12 and 13 made integrally of one and the same electrically insulating material.
Due to the insulating part of the insulating part, this assembly can be fabricated separately from the rest of the disclosed device, and the introduction chamber 1
prior to installation, and after fabrication and assembly of all other structural components of the disclosed flameproof electrical device. In this way, the number of assembly operations performed in the confined space of the fireproof rooms 1 and 4 is further reduced, facilitating the fabrication of the disclosed flameproof electrical device.

〔Effect of the invention〕

From the above disclosure, it is clear that the present invention simplifies the construction of flameproof electrical equipment and facilitates its fabrication.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a side sectional view of a flameproof electrical device embodying the present invention;
FIG. 2 is an enlarged side cross-sectional view of the interlocking disconnect switch installed using the feedthrough terminal according to the present invention, and FIG. It is an enlarged side sectional view when it is integrated as a solid. DESCRIPTION OF SYMBOLS 1... Flameproof introduction room, 2... Conductor, 3... Power supply cable, 4... Configuration room, 5... Components of electric circuit,
6... Lid of flameproof configuration room, 7... Flameproof partition, 8...
...Interlocking disconnector, 9...Input terminal, 10...Output terminal, 11...Through conductive terminal, 11'...Conductive part, 1
2... Penetrating conductive terminal, 12'... Conductive part, 13...
・Through conductive terminal, 14... Flameproof casing, 15...
- Flameproof room, 16... Axis of interlocking disconnector 8, 17... Handle, 18... Panel, 19... Contact, 20...
Connector, 21. 21'... Conductor, 22... Penetration terminal, 23... Flameproof terminal, 24... Output chamber, 25...
・Conductive core, 26... Cable, 27... Sealing ring, 28... Thrust cable sleeve, 2...
Wall, 30...lid, 31...wall, 32...lid,
33...Wall, 34...Conductor (connection wire), 35...
... Bottle with eagle, 36... Tightening body, 37.38...
Fixed contacts, 3...conductors, 40...threaded bottles,
41.42... Tightening body, 43... Movable contact, 44
．． 45...4+1', sex element, 46.47...part, 48...threaded bottle, 49.50...tightening body.

Claims (1)

[Claims] 1. A flameproof introduction chamber (1) for the introduction conductor (2) and the power supply cable (3), for accommodating therein the electrical components (5) of the electrical circuit of the flameproof electrical device. Suitable fireproof configuration room (4
), Lid (6) of fireproof component room (4), Fireproof introduction room (1)
a flameproof partition (7) that separates the fireproof component room (4) from the flameproof partition (7), has at least one input terminal (9) and at least one output terminal (10), and is attached to the flameproof partition (7). The interlocking disconnector (8) is connected to the flameproof partition (7) in order to connect the conductive core of the power supply cable (3) to the input terminal (9) of the interlocking disconnector (8) via the conductor (2). At least one first through-conducting terminal (11) attached to the output terminal (10) of the interlocking disconnector (8) and the electrical circuit of the flameproofing electrical device housed in the flameproofing configuration chamber (4). The components of (
5) at least one feedthrough conductive terminal (12) electrically connected to the interlocking disconnector (8) and the flameproof configuration chamber (4);
In a flameproof electrical device having a biasing mechanism mechanically connected to the lid (6) of the flameproofing partition (7), furthermore, another through-conducting terminal (12) on the flameproof partition (7) is provided.
), the output terminal (10) of the interlocking disconnector (8) and a component of the electrical circuit in the flameproof configuration room (4). (5)
The electrical connection with the through conductive terminals (1
3 and 12), and also a flameproof partition (7
) and having a flameproof casing (15) which, together with the through-conducting terminals (11 and 13) and the flameproof partition (7), defines a flameproof compartment housing an interlocking disconnector (8) therein. Features: Flame-retardant electrical equipment. 2. The interlocking disconnector (8) has at least one through conductive terminal (11) and at least one through conductive terminal (12).
3. The flameproof electrical device according to claim 1, characterized in that the flameproofing partition (7) is attached to the flameproof partition (7) by at least one through-conducting terminal () selected from the group consisting of: 11, 12, 13), interlocking disconnector (
8) and the flameproof partition (7) form an integrated independent assembly. 3. A flameproof electrical device according to claim 1 or 2, characterized in that the flameproof partition (7) forms an integrated independent assembly. 4. The flameproof electrical device according to any one of claims 1 to 3, characterized in that the flameproof partition (7) is made of an electrically insulating material integrally with the insulating component of the through-conducting terminal. .