UA8297U - Ship power cable for explosive environment ?? ?? ?? ?? - Google Patents

Abstract

The proposed ship power cable for explosive environment contains even number of flexible conductors with rubber insulation, with or without a screen, a reinforcing sheath, an inside protective sheath, an outside protective sheath, and a metallic armor. The inside and outside protective sheaths are made of cross-linked polymer, which is applied by extrusion, or incombustible polyvinylchloride material.

Description

Description of the invention

The useful model refers to the field of electrical engineering, namely, to the constructions of ship telephone cables, 2 intended for fixed laying in explosive rooms and spaces on ships of the sea and river fleet, for operation in control circuits, control circuits at a voltage of up to 0.15/0, 25 kV alternating current with a frequency of 1200 Hz.

The prototype is a ship's telephone cable for explosive environments, containing two or more current-conducting cores with rubber insulation of the РТИ-1 type. A screen of 70 metallized paper, made in the form of a winding, is placed on top of each insulated core. Paired twisting of the cable cores is performed without a screen while providing transient attenuation indicators. A fastening element is superimposed on top of the twisted wires with an overlap, on top of which the inner shell, armor made of two galvanized steel strips and the outer shell are successively superimposed with filling. The shells are made of polyvinyl chloride plastic. | Ship cables for explosive environments". Technical conditions of TU 16-505.405-781I. 12 The disadvantages of the specified cable are low operating temperature (no more than 702C), large diameter and mass, low fire safety.

The task of a valid useful model is to create such a construction of a ship's telephone cable for explosive environments, in which, due to the introduction of new elements and the use of new materials, the working temperature would be increased to 852C and the fire safety of the cable would be increased.

The task is achieved by the fact that in the telephone ship cable for explosive environments, which contains twisted rubber-insulated current-conducting cores with or without a screen, an element that fastens the armor located between the inner and outer plastic shells, according to the useful model, the number of current-conducting cores is 2 flexibility class with insulation from ethylene propylene rubber is made in pairs, while the mentioned cores or pairs of cores are twisted into a core with a fastening element made of polyethylene terephthalate film, and the inner and outer shells are made of extruded, cross-linked halogen-free and composition or non-flammable polyvinyl chloride plastic.

The advantage of the proposed cable is that the use of ethylene propylene rubber insulation increases the heat resistance of the cable up to 852С. The inner and outer sheaths, made of extruded cross-linked halogen-free m 20 composition or of non-flammable polyvinyl chloride plasticate, provide grease resistance, resistance to rays, and also ensure high fire safety of the cable, because it does not spread flames, does not emit (22) corrosively active gases and has low smoke emission during fire. high school

The screen, made of synthetic film foiled with aluminum (instead of metallized paper in the prototype), is more durable, efficient and reliable. (uh)

The screen can be placed on top of the insulation of each conductive core in the form of a winding with an overlap of at least 1095 metal on the outside, which increases the cable's noise immunity.

The screen can be placed on top of each twisted pair in the form of a winding with an overlap of at least 1590 " metal inside with a longitudinal arrangement of the grounding wire under it, which increases the noise immunity of the cable. -

The armor can be made in the form of a braid of galvanized steel wires with a density of at least 8095, which 79 allows to increase the flexibility of the cable. c The cable can additionally contain a fastening element on top of the armor, which improves the separation of the cable and increases its flexibility.

The proposed useful model is schematically depicted in the figure, where 1 is a conductive core, so that 2 is rubber insulation,

C is a twisted pair, ko 4 is a pair screen, c 5 is a grounding wire, 6 is a fastening element that 50 7 is an inner plastic shell, 8 is armor, 9 is an outer plastic shell.

Ship telephone cable for explosive environments contains twisted rubber-insulated 2

Sov conductive cores 1 with or without a screen 4, an element 6 that binds, an armor 8, located between the inner 7 and outer 9 plastic shells. In the cable, the number of current-conducting cores of flexibility class 2 with insulation 2 of ethylene propylene rubber is made in pairs, while the mentioned cores 1 or pairs of cores C are twisted into a core with an element 6 that fastens from a polyethylene terephthalate film, and the inner 7 and outer 9 shells are made of extruded, stitched halogen-free composition or non-flammable polyvinyl chloride plastic. in Example

Cable Жх(2x1.5) contains six current-conducting cores 1, made according to the 2nd class of flexibility with a cross section of 1.5mm7, each of which is covered with insulation 2 from ethylene-propylene rubber, superimposed on the line of continuous vulcanization.

Insulated cores 71 are twisted in pairs with a twist pitch of no more than 120 mm. The insulation of 2 wires 1 in each pair of C differs in color from one another. On top of each twisted pair C, a screen 4 made of synthetic 65 film, foiled with aluminum, is placed in the form of a winding with an overlap of at least 1595 metal inside with a longitudinal arrangement of the grounding wire 5 under it. The shielded pairs C are twisted into a core and covered with an element 6 that fastens from polyethylene terephthalate a film applied in the form of a winding with an overlap. An inner shell 7 and armor 8, which is made of braided galvanized steel wires with a density of 8095, are placed on top of the core. An element 6 is successively placed on top of the armor 8, which fastens the outer shell 9 in the form of a winding with an overlap.

Shells 7 and 9 are made of cross-linked halogen-free composition and applied on the extrusion line. with 1 t y y - Zh ny y 3 g OT y. and , and d-- 6! "not 7

It's working

And lyut o shchi -y Pa y

Fig. what 2

Claims (5)

The formula of the invention is that F 1. Ship telephone cable for explosive environments, containing twisted rubber-insulated conductive cores with or without a screen, a fastening element, an armor located between the inner and SM outer plastic sheaths, which is distinguished by the fact that the number of conductive cores of class 2 with flexibility with insulation from ethylene propylene rubber is made in pairs, while the mentioned cores or pairs of cores are twisted into a core with a fastening element made of polyethylene terephthalate film, and the inner and outer shells are made of extruded cross-linked halogen-free composition or non-flammable polyvinyl chloride plastic. 2. The cable according to claim 1, which differs in that it has a screen made of a synthetic film foiled with aluminum. with 3. The cable according to claim 2, which differs in that the screen is superimposed on top of the insulation of each conductive core in the form of a winding with an overlap of at least 10 95 metal on the outside. c 4. The cable according to claim 2, which differs in that the screen is superimposed on top of each twisted pair in the form of a "" winding with an overlap of at least 15,956 metal inside with a longitudinal arrangement of the "earthing" wire under it. 5. The cable according to claim 1, which differs in that the armor is made in the form of a braid of galvanized steel wires with a density of at least 80,905. (ee) 6. The cable according to claim 5, which differs in that it additionally contains a fastening element on top of the armor . Official Bulletin "Industrial Property". Book 1 "Inventions, useful models, topographies of integrated re) microcircuits", 2005, M 7, 15.07.2005. State Department of Intellectual Property of the Ministry of Education and "m 20 of the sciences of Ukraine, So 60 b5