SU851515A1 - Explosion-proof electric apparatus (its versions) - Google Patents

Description

one

The invention relates to explosion-proof electrical apparatuses intended for operation in explosive industries of mines and chemical enterprises, namely, to flameproof control posts, limit switches, switches.

The stationary connection of conductors to flameproof apparatus is, as a rule, performed by armored cables having rigid aluminum or copper conductors, which do not allow repeated bends. It is also impractical to use in devices of the construction of connected cable cores to pass-through terminals, in which the cable previously inserted into the device must then be pulled out through the cable inlets to eliminate cable core inlet.

For the convenience of installation, acceptable apparatus designs are those in which the cable connection points to the pass-through terminals are located near the housing window of the apparatus.

When using designs of apparatuses in which the connection points

the cable core to the feed-through clamps are located on the rear side of the removable partition to provide ease of installation and operation, it is advisable to allow the cable to be inserted into the cable core, while the KciMepa device must have large inlets.

The explosion-proof electrical apparatus is known, the shell of which includes a housing and a hook forming the input and switching device chambers separated from one another by a partition with pass-through clamps 1

15

Such a device provides ease of installation, but has large dimensions and weight.

Also known is a blast-proof electrical apparatus, comprising a housing and caps, forming an input chamber and a switching chamber, separated from each other by a partition with passageways having an opening, with one of the covers

25 closes the connection points of the conductors to the bushing, and the partition wall together with the walls of the housing forms an additional chamber L 2j

However, the well-known a 1 device has 30 large dimensions.

The purpose of the invention is to reduce the size.

The goal is achieved by the fact that in an explosion-proof electric apparatus according to the first embodiment, comprising a housing and kryiaks, forming an input chamber and a switching chamber, separated from each other by a partition with passage clamps having an opening, one of the lids closing the points of connection of conductors to the passage clamps, and the partition, together with the walls of the housing, forms an additional chamber, which communicates through the opening in the partition with the switching chamber, in the cover, which closes the connecting points Inonii conductors to the feedthrough terminals, a hole, a cover installed so that formed therein about aerstie aligned with the hole in the partition, and the cover also performs the function of the partition.

In the second variant, another opening is made in the partition, the openings are located so that the additional and switching chambers are connected to each other, and the lid covering the connection points of the conductors to the pass-through terminals also performs the function of the partition.

FIG. 1-3 shows the proposed apparatus, the first option; FIG. 4 is a top view of FIG. one; in fig. 5 - the proposed apparatus, the second option / in FIG. b - top view in FIG. 3

The explosion-proof electric apparatus in the first embodiment includes a housing 1 and a cover 2, a chamber 3 for inputting conductors and a switching chamber 4, separated from each other by a partition 5 with pass-through clamps b. The partition 5 together with the walls of the housing 1 forms an additional chamber 7 communicating with the switching chamber 4. The connecting points for the conductors 9 to the passage clamps b are closed by a lid 10 located inside the apparatus, and in the partition 5 there is an opening 11 through which the additional chamber 7 is connected with camera 4 switching device.

In the first embodiment of the apparatus, the opening 11 of the partition 5 is aligned with the opening 12 of the cover 10

PSU the second option in the partition 5 made another hole 13. Through the hole 13 and the hole 11 additional chamber 7 communicates 1ts with the Switch chamber 4.

The partition 5 can be threaded to the housing 1 (figure 1), made at the same time (figure 5), have its cover 14 (figure 2) or be filled with epoxy resin 15 (figure 3).

The partition 5 is connected with the cover 10 with the possibility of a connector (Fig. 2, 3 and 5).

Claims (2)

1. An explosion-proof electrical apparatus, comprising a housing and covers forming the input chamber and the switching chamber, separated from each other by a partition with passage clamps, and having a hole, one of the covers closes the meta connection of the conductors to the pass-through clamps, and the partition, together with the walls of the housing, forms an additional chamber that communicates through an opening in the partition with a communication chamber, characterized in that, in order to reduce overall dimensions, the cover, which covers the middle points conductors to pass-through clamps, a hole is made, the cover is installed so that the hole made in it is aligned with the hole in the partition, and the cover also performs the function of a partition. 2. An explosion-proof electric apparatus comprising a housing and covers forming an input chamber and a switching chamber, separated from each other by a partition with passage clamps having an opening, one of the cable covers the connection points of the conductors to the pass-through clamps, and the partition, together with the walls of the housing, forms an additional chamber, characterized in that, in order to reduce the dimensions, another opening is made in the partition, so that the additional chamber is provided and of the camera with each other, and the lid covering the points where the conductors are connected to the pass-through terminals also performs the function of a partition. Sources of information taken into account in the examination 1. The patent of England No. 795543, cl. H 1 N, 1956. 2.Certificate of the USSR 614471. cl. H 01 H 9/04, 1976, r // HCHUT 5 3 (put.f e ro 3