CN209747227U - Power cable for explosion-proof ship - Google Patents

Abstract

The utility model discloses an explosion-proof power cable for ships, which comprises a conductor, an insulating layer, a filling layer, a flame-retardant layer, a shielding layer, an armor layer and an outer sheath, wherein the insulating layer is extruded outside the conductor, the filling layer is arranged between core gaps of the conductor, the flame-retardant layer is wrapped outside the filling layer, the inner sheath is extruded outside the flame-retardant layer, the shielding layer is wrapped outside the inner sheath, the armor layer is woven outside the shielding layer, the outer sheath is extruded outside the armor layer, a material with excellent electrical property and small relative dielectric constant is selected, working capacitance between cable insulating core is controlled through the integral structure design, capacitance energy storage is reduced, the ignition of an explosion mixture caused by capacitance energy storage discharge when the circuit is frequently closed and disconnected is prevented, the safety of the circuit operation environment is greatly increased, the inner sheath is arranged outside the inner sheath or a combined shielding layer is formed by an aluminum-plastic-copper composite belt and the armor layer, the transmission impedance when, the cable is guaranteed to have excellent shielding performance, and interference to adjacent circuits is avoided.

Description

Power cable for explosion-proof ship

Technical Field

The utility model relates to a naval vessel cable field specifically is an explosion-proof naval vessel power cable.

background

With the transformation and upgrading of modern ships, the requirements on cables on ships are higher and higher, at present, almost all power systems and control systems on ships are directly or indirectly driven or controlled by electric energy, electric energy and electromagnetic energy weapons based on electricity, such as electromagnetic guns and the like, are also added on ships in the future, circuits for the devices are frequently opened and closed according to the use requirements, the cables are used as energy storage elements to store power in the form of electric fields, when the circuits are closed, not only can the discharge of stored energy of capacitors exist, but also the discharge of resistance circuits exist, the discharge flow of the capacitor circuits is larger, the speed is higher, the discharge energy of sparks is more concentrated, the dangerousness is high, and if the circuits pass through a storage area of inflammable and explosive substances, the ignition of explosive mixtures is easily caused.

chinese utility model patent with patent application number (CN201310606473.1) describes a novel explosion-proof cable, including: the cable conductor core, the outside of cable conductor core is provided with the internal insulation layer, the outside of internal insulation layer is provided with fire-retardant filling layer, the outside of fire-retardant filling layer is provided with interior explosion-proof layer, the outside of interior explosion-proof layer is provided with the external insulation layer, the outside of external insulation layer is provided with the shielding layer, the outside of shielding layer is provided with outer explosion-proof layer, the outside of outer explosion-proof layer is provided with fire-retardant oversheath layer, and its unable control cable insulation sinle silk is worked electric capacity within a definite time, can't reduce the electric capacity energy storage.

SUMMERY OF THE UTILITY MODEL

an object of the utility model is to provide an explosion-proof naval vessel power cable to solve above-mentioned technical problem.

The purpose of the utility model can be realized by the following technical scheme:

The utility model provides an explosion-proof naval vessel power cable, includes conductor, insulating layer, filling layer, fire-retardant layer, shielding layer, armor and oversheath, and the conductor is crowded package one deck insulating layer outward, and the sinle silk clearance of conductor is provided with the filling layer, and the filling layer is wrapped outward around there being fire-retardant layer, and fire-retardant layer is crowded package inner sheath outward, and the inner sheath is outer around wrapping shielding layer, and the armor is woven outward to the shielding layer, and the armor is crowded package oversheath outward.

as a further proposal of the utility model, the conductor adopts single or multiple tinned copper normal transposition.

As a further proposal of the utility model, the pitch of the twisted wire of the conductor is 16 to 18 times of the diameter of the conductor.

As a further proposal of the utility model, the insulating layer is made of vulcanized ethylene propylene rubber.

As a further proposal of the utility model, the filling layer is made of low-smoke halogen-free sizing material.

As a further proposal of the utility model, the inner sheath is a low-smoke halogen-free flame retardant material, and the outer irradiation cross-linked polyolefin of the inner sheath.

As a further proposal of the utility model, the shielding layer is formed by wrapping aluminum plastic or steel plastic composite belts.

As a further proposal of the utility model, the armor layer is formed by weaving metal wires with weaving density more than or equal to 75 percent.

As a further proposal of the utility model, the metal wire is the mixture of two or more of tinned copper wire, galvanized steel wire and aluminum alloy wire.

As a further proposal of the utility model, the structure of the outer sheath is the same as that of the inner sheath.

The utility model has the advantages that:

1. The utility model relates to an explosion-proof naval vessel power cable, the conductor adopts single or many tinned copper formal transposition, the conductor is crowded package one deck insulating layer outward, be provided with the filling layer between the sinle silk clearance of conductor, the filling layer is wrapped outward and is had fire-retardant layer, fire-retardant layer crowded package inner sheath outward, the inner sheath is wrapped the shielding layer outward, the armor is woven outward to the shielding layer, satisfy the requirement of future naval vessel explosion-proof circuit, it is excellent to select the electrical property, the material that relative dielectric constant is little, through the overall structure design, working capacitance between the insulating sinle silk of control cable, reduce the electric capacity energy storage, prevent that the circuit is frequent closed, electric capacity energy storage discharges and leads to the explosive mixture to light when the disconnection, greatly increased.

2. The utility model relates to an explosion-proof naval vessel power cable establishes plastic-aluminum or copper-plastic composite tape shielding and armor layer formation combination shielding layer including the sheath skin, makes the transmission impedance of cable shielding impedance transfer when 100MHz reaches below be not more than 1 omega/m, guarantees that the cable has good shielding property, can not cause the interference to adjacent circuit.

drawings

in order to facilitate understanding for those skilled in the art, the present invention will be further described with reference to the accompanying drawings.

Fig. 1 is the utility model discloses an explosion-proof naval vessel power cable's cross section schematic diagram.

in the figure: 1. a conductor; 2. an insulating layer; 3. a filling layer; 4. a flame retardant layer; 5. an inner sheath; 6. a shielding layer; 7. an armor layer; 8. an outer sheath.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1, an explosion-proof power cable for ships comprises a conductor 1, an insulating layer 2, a filling layer 3, a flame retardant layer 4, a shielding layer 6, an armor layer 7 and an outer sheath 8, wherein the conductor 1 is normally twisted by one or more tinned copper, the twisted wire pitch of the conductor 1 is 16-18 times of the conductor diameter, the conductor 1 is extruded with the insulating layer 2, the insulating layer 2 is made of vulcanized ethylene propylene rubber, the filling layer 3 is arranged between the wire core gaps of the conductor 1, the filling layer 3 is made of low-smoke halogen-free glue, the filling layer 3 is wrapped with the flame retardant layer 4, the flame retardant layer 4 is extruded with the inner sheath 5, the inner sheath 5 is made of low-smoke halogen-free flame retardant material, the outer layer of the inner sheath 5 is irradiated with cross-linked polyolefin, the inner sheath 5 is wrapped with the shielding layer 6, the shielding layer 6 is wrapped with an aluminum-plastic or steel composite tape, the armor layer 7 is woven outside the shielding layer 6, and the armor layer 7 is woven by metal, the metal wire is a mixture of two or more of a tinned copper wire, a galvanized steel wire and an aluminum alloy wire, an outer sheath 8 is extruded outside the armor layer 7, and the outer sheath 8 and the inner sheath 5 are identical in structure.

The utility model provides an explosion-proof naval vessel power cable, conductor 1 adopts single or many tinned copper to form through the normal transposition, the stability of conductor 1 when installation and use has been improved, and the stranded conductor pitch of conductor 1 sets up to 16-18 times conductor diameter, and then can prevent that phenomenon such as cracks from appearing in later stage processing conductor 1, influence subsequent manufacturing procedure, be provided with filling layer 3 through the sinle silk clearance at conductor 1, make and separate each other between the sinle silk, and then make and can not influence other sinle silks because of the damage of single sinle silk between each sinle silk, and filling layer 3 is made for low smoke and zero halogen's sizing material, when each sinle silk is wrapped fire-retardant layer 4 outward, filling layer 3 can be for the certain extrusion force of each sinle silk bearing, make the cable when having explosion-proof function, the life of cable has also been improved.

The utility model discloses when using, conductor 1 adopts single or many tin-plated copper normal transposition, conductor 1 extrudees a layer insulating layer 2 outward, be provided with filling layer 3 between the sinle silk clearance of conductor 1, filling layer 3 is wrapped around outward and is had fire-retardant layer 4, fire-retardant layer 4 is crowded a packet inner sheath 5 outward, inner sheath 5 is wrapped around outward and is shielded layer 6, shielding layer 6 is outer to weave armor 7, satisfy the requirement of future marine explosion-proof circuit, select the material that the electrical property is excellent, relative dielectric constant is little, through overall structure design, control cable insulation sinle silk working capacitance, reduce the electric capacity energy storage, prevent that the electric capacity energy storage discharges and leads to the explosive mixture to light when frequently closing, the disconnection, greatly increase the safety of circuit operational environment; the aluminum-plastic or copper-plastic composite belt shielding and the armor layer 7 are arranged on the outer layer of the inner sheath 5 to form a combined shielding layer, so that the transmission impedance of the cable with the shielding transfer impedance of 100MHz or below is not more than 1 omega/m, the cable is ensured to have excellent shielding performance, and the interference to adjacent circuits is avoided.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims (1)

1. The anti-explosion power cable for the ships is characterized by comprising a conductor (1), an insulating layer (2), a filling layer (3), a flame-retardant layer (4), a shielding layer (6), an armor layer (7) and an outer sheath (8), wherein the insulating layer (2) is extruded outside the conductor (1), the filling layer (3) is arranged between core gaps of the conductor (1), the flame-retardant layer (4) is wound outside the filling layer, the inner sheath (5) is extruded outside the flame-retardant layer (4), the shielding layer (6) is wound outside the inner sheath (5), the armor layer (7) is woven outside the shielding layer (6), and the outer sheath (8) is extruded outside the armor layer (7);

The conductor (1) is regularly twisted by adopting single or multiple tinned copper wires;

The strand pitch of the conductor (1) is 16-18 times the diameter of the conductor;

The insulating layer (2) is made of vulcanized ethylene propylene rubber;

The filling layer (3) is made of low-smoke halogen-free rubber;

The inner sheath (5) is made of low-smoke halogen-free flame retardant material, and the outer layer of the inner sheath (5) is irradiated with cross-linked polyolefin;

the shielding layer (6) is formed by wrapping an aluminum-plastic or steel-plastic composite tape;

the armor layer (7) is formed by weaving metal wires with weaving density being more than or equal to 75%;

The metal wire is a mixture of two or more of a tinned copper wire, a galvanized steel wire and an aluminum alloy wire;

The outer sheath (8) and the inner sheath (5) have the same structure.