CN115274210A - Zero-buoyancy photoelectric composite transverse watertight cable and manufacturing method and application thereof - Google Patents

Abstract

The invention discloses a zero-buoyancy photoelectric composite transverse watertight cable, which has a wrapping layer, and a wire group is arranged in the wrapping layer. The first cross-linked polyethylene insulator is extruded outside the conductor, the optical fiber has a single-mode optical fiber, a stainless steel bundle tube is arranged outside the single-mode optical fiber, the stainless steel bundle tube is extruded with a high-density polyethylene material sheath, and the ground wire has a ground wire The conductor, the ground wire conductor is extruded and wrapped with a second cross-linked polyethylene insulator; an inner sheath, a tensile layer, a foamed layer and an outer sheath are arranged in sequence outside the wrapping layer, wherein the wrapping layer and the wire group are provided with a filler body. The invention also discloses a manufacturing method and application of a zero-buoyancy photoelectric composite transverse watertight cable. The invention can freely suspend at any position in the water, and the structural design is optimized so that the lateral water resistance and tensile force performance are excellent, and the application requirements of the composite watertight cable are solved.

Description

Zero-buoyancy photoelectric composite transverse watertight cable and its production method and application

technical field

The invention relates to a cable, in particular to a zero-buoyancy photoelectric composite transverse watertight cable and a manufacturing method and use thereof.

Background technique

Underwater equipment needs zero-buoyancy photoelectric composite horizontal watertight cables to meet the needs of power supply and signal transmission when working. Although the existing zero-buoyancy photoelectric composite horizontal watertight cables can meet the basic requirements, they are insufficient in lateral water resistance and tensile properties, and cannot meet the needs of complex working environments.

Contents of the invention

The object of the present invention is to solve the above-mentioned problems, and provide a zero-buoyancy photoelectric composite horizontal watertight cable, which has good horizontal water-blocking performance and excellent tensile performance.

In order to achieve the above object, the present invention adopts the following technical scheme: a zero-buoyancy photoelectric composite transverse watertight cable, which is characterized in that it has a wrapping layer, and a wire group is arranged in the wrapping layer, and the wire group has a plurality of wires, optical fibers, and ground wires. , the wire has a conductor, the conductor is twisted by silver-plated copper wire, the first cross-linked polyethylene insulator is extruded outside the conductor, the optical fiber has a single-mode optical fiber, and a stainless steel bundle tube is arranged outside the single-mode optical fiber, and the stainless steel bundle tube is extruded to a height Density polyethylene material sheath, the ground wire has a ground wire conductor, and the second cross-linked polyethylene insulator is extruded outside the ground wire conductor;

An inner sheath, a tensile layer, a foam layer and an outer sheath are sequentially arranged outside the wrapping layer, wherein a filling body is arranged between the wrapping layer and the wire group.

Further: the filling body is solid filling and/or aramid.

Further: the wrapping layer is made of non-woven fabric, and the covering rate is not less than 30%.

Further: the inner sheath is made of polyether polyurethane, and the outer sheath is made of polyether polyurethane.

Further: The tensile layer is made of high modulus fiber double-layer forward and reverse winding.

Further: the foam layer is made of foam polyurethane.

On the other hand, a method for making the above-mentioned zero-buoyancy photoelectric composite transverse watertight cable is characterized in that it has the following steps:

The step of making the wire, the silver-plated copper wire is twisted into a conductor, and the conductor is extruded and wrapped with the first cross-linked polyethylene insulator;

The step of making the optical fiber, the single-mode optical fiber is provided with a stainless steel bundle tube, and the stainless steel bundle tube is extruded with a sheath;

In the cable-forming step, a cable-forming machine with untwisting function is used to arrange and twist the conductors, optical fibers, ground wires and solid fillers in a clockwise direction to form a cable. Around the cladding, the covering rate is not less than 30%;

the step of extruding the inner sheath;

In the step of winding the tensile layer, use at least 36 coils and cages to wind the first layer of tensile layer, the winding direction is left, the angle between the fiber rope and the cable axis should be controlled between 30 and 45°, and To achieve 100% coverage, at the same time loosely wind the aramid fiber; the same equipment and control method are used to wind the second tensile layer, and the winding direction is right;

The step of extruding the foam layer. In this step, a large inner diameter and large width tray is used to take up the wire to prevent the foam layer from being squeezed and deformed by force. The ratio of the outer diameter to the inner diameter of the tray is 2:1.6 ;

Steps for extruding the outer sheath.

Further, a layer of polyether polyurethane is extruded outside the foam layer to form an outer sheath to protect the foam layer and withstand a lateral water pressure of 40MPa. In this step, an extrusion mold is used to extrude so that the thickness after extrusion is small and the outer surface The diameter fluctuation range is small, smooth and round. The extrusion mold has an inner mold and a stepped outer mold. The inner mold has a channel. The channel has a closed conical section and a columnar section arranged in sequence. In the flow channel, a buffer structure is provided on the outer wall of the flow channel, and the buffer chamfer in the buffer structure is 160-170 degrees, wherein the side wall roughness of the flow channel is 0.6-0.9 μm.

On the other hand, the use of a zero-buoyancy photoelectric composite transverse watertight cable prepared by the above-mentioned manufacturing method is applied to underwater sonar equipment.

Compared with the prior art, the present invention has the following beneficial effects: the present invention can be freely suspended in any position in the water, and the structural design is optimized so that the lateral water resistance and tensile resistance are excellent, which solves the use requirements of the composite watertight cable.

Description of drawings

Figure 1 is a structural diagram of the zero-buoyancy photoelectric composite transverse watertight cable in Example 1.

Fig. 2 is a structural diagram of the tray in embodiment 2.

Fig. 3 is the structural diagram of extrusion mold in embodiment 2.

Detailed ways

Example 1

Referring to Figure 1, a zero-buoyancy photoelectric composite transverse watertight cable has a wrapping layer, and a wire group is arranged in the wrapping layer. The wire group has a plurality of wires, optical fibers, and ground wires. The wires have a conductor 11, and the conductor 11 is made of silver-plated copper. The first cross-linked polyethylene insulator 12 is extruded outside the conductor, and its density is less than 1g/cm3 (the first cross-linked polyethylene insulator 12 extruded outside the conductor), the optical fiber has a single-mode optical fiber 51, and the single-mode A stainless steel bundle tube 52 is arranged outside the optical fiber 51 to protect the optical fiber. The stainless steel bundle tube 52 is extruded with a high-density polyethylene material sheath 53, and the ground wire has a ground wire conductor 21, which is extruded and wrapped with a second cross-linked polymer. Vinyl insulator22.

The conductor 11 is a silver-plated copper conductor, which improves the current carrying capacity by 20% of the same conductor section. The first cross-linked polyethylene insulator is cross-linked polyethylene material with high dielectric strength, temperature resistance level up to 90°C, light specific gravity, and improved current carrying capacity.

An inner sheath 42 , a tensile layer 43 , a foam layer 44 and an outer sheath 45 are sequentially arranged outside the wrapping layer, wherein a filler 3 is arranged between the wrapping layer 41 and the wire group.

In this embodiment, the filling body 3 is solid filling and/or aramid fiber.

In this embodiment, the wrapping layer 41 is made of non-woven fabric, and the overlapping rate is not less than 30%.

In this embodiment, the inner sheath 42 is made of polyether polyurethane, which facilitates the vulcanized connection of the connector.

In this embodiment, the tensile layer 43 is made of high-modulus fiber double-layer forward and reverse winding, which meets the requirements of the working tension and breaking tension of the cable.

In this embodiment, the foam layer 44 is made of foam polyurethane to maintain a stable foam structure.

In this embodiment, the outer sheath 45 is made of polyether polyurethane to protect the foam layer and resist lateral water pressure.

The density of fresh water is 1g/cm3, and the density of the cable is the weight of the finished cable per unit length divided by the volume of the finished cable per unit length. Through precise control of the weight and outer diameter of the cable, the cable density is 1g/cm3±1%, and the horizontal watertightness The cable is freely suspended in any position in the water, and the optimization of the structural design makes it excellent in lateral water resistance and tensile strength, which solves the requirements for the use of composite watertight cables.

Example 2

This embodiment produces the transverse watertight cable in Embodiment 1.

The structure and numbers involved in the extrusion mold in this embodiment are as follows: 60 passages, 61 inner mold, 61a inner mold die opening, 62 stepped outer mold, 63 runners, 621 buffer chamfering, after A is cabled and wrapped The cable, B the extruded cable, C the molding area.

This embodiment relates to a method for manufacturing a zero-buoyancy photoelectric composite transverse watertight cable, which has the following steps:

In the step of making wires, silver-plated copper wires are twisted into conductors (preferably, the stranding mold adopts nanometer molds to reduce damage to the silver-plated layer), and the first cross-linked polyethylene insulator is extruded outside the conductors.

In the process of making optical fiber, a stainless steel bundle tube is arranged outside the single-mode optical fiber, and a sheath is extruded outside the stainless steel bundle tube.

In the cable-forming step, a cable-forming machine with untwisting function is used to arrange and twist the conductors, optical fibers, ground wires and solid fillers in a clockwise direction to form a cable. Around the cladding, the overlapping rate shall not be less than 30%.

Steps for extruding the inner sheath.

In the step of winding the tensile layer, use at least 36 coils and cages to wind the first layer of tensile layer, the winding direction is left, the angle between the fiber rope and the cable axis should be controlled between 30 and 45°, and To achieve 100% coverage, at the same time loosely wind the aramid fiber; the same equipment and control method are used for winding the second tensile layer, and the winding direction is right.

The step of extruding the foam layer. In this step, a large inner diameter and large width tray is used to take up the wire to prevent the foam layer from being squeezed and deformed by force. The ratio of the outer diameter to the inner diameter of the tray is 2:1.6 (The ratio of the outer diameter to the inner diameter of conventional trays is 2:1, and the trays of this size are easy to cause the foam layer to be squeezed and deformed during use). Specifically, the dish has an inner diameter of 1600mm, an outer diameter of 2000mm, and a width of 1800mm, and the dish is a stainless steel dish.

Steps for extruding the outer sheath.

In this embodiment, a layer of polyether polyurethane is extruded outside the foam layer to form an outer sheath to protect the foam layer and withstand a lateral water pressure of 40MPa. In this step, an extrusion mold (see Figure 3) is used to extrude After extrusion, the thickness is small, the fluctuation range of the outer diameter is small, and it is smooth and round. The extrusion mold has an inner mold and a stepped outer mold. There is a flow channel (for flowing through the extrusion fluid) between the inner mold and the stepped outer mold, the outer wall of the flow channel is provided with a buffer structure, and the buffer chamfer in the buffer structure is 160-170 degrees (preferably 165 degrees), Wherein, the roughness of the side wall of the runner (the inner wall surface of the outer mold and the outer wall surface of the inner mold) is 0.6-0.9 μm (preferably 0.8 μm). The lengthened design of the inner mold opening (partially extending to the outside of the outer mold), coupled with the design of the stepped outer mold and buffer chamfer (specific chamfer value), can reduce the extrusion pressure, and cooperate with the reduction of the outer wall of the inner mold and the inner wall of the outer mold. The surface roughness (specific roughness) of the runner part, as well as the overall design, the combined effect makes the thickness after extrusion small, the fluctuation range of the outer diameter small, smooth and round.

It should be noted that, from the beginning of conductor production to the last outer sheath process, in each production process, the size and weight should be strictly controlled, and finally meet the cable density of 1g/cm3±1%, so as to achieve the cable in the Freely float anywhere in the water.

Example 3

A use of the zero-buoyancy photoelectric composite transverse watertight cable in embodiment 1 or embodiment 2 (the zero-buoyancy photoelectric composite transverse watertight cable prepared by the manufacturing method in this embodiment) is applied to underwater sonar equipment.

The above descriptions are only preferred implementations of the present invention, and the scope of protection of the present invention is not limited to the above-mentioned implementations. All technical solutions belonging to the principle of the present invention belong to the scope of protection of the present invention. For those skilled in the art, some improvements made without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims (9)

1. A zero-buoyancy photoelectric composite transverse watertight cable is characterized in that it has a wrapping layer, and a wire group is arranged in the wrapping layer, and the wire group has a plurality of wires, optical fibers, ground wires, and the wire has a conductor, and the conductor is made of silver-plated copper The first cross-linked polyethylene insulator (12) is extruded outside the conductor, and the optical fiber has a single-mode optical fiber (51). ) is extruded with a high-density polyethylene material sheath (53), the ground wire has a ground wire conductor (21), and the ground wire conductor (21) is extruded with a second cross-linked polyethylene insulator (22); An inner sheath (42), a tensile layer (43), a foam layer (44) and an outer sheath (45) are sequentially arranged outside the wrapping layer, wherein a filler is provided between the wrapping layer (41) and the wire group. body (3). 2. The zero-buoyancy photoelectric composite transverse watertight cable according to claim 1, characterized in that the filler (3) is solid filler and/or aramid fiber. 3. The zero-buoyancy photoelectric composite transverse watertight cable according to claim 1, characterized in that the wrapping layer (41) is made of non-woven fabric, and the covering rate is not less than 30%. 4. The zero-buoyancy photoelectric composite transverse watertight cable according to claim 1, characterized in that: the inner sheath (42) is made of polyether polyurethane, and the outer sheath (45) is made of polyether polyurethane. 5. The zero-buoyancy photoelectric composite transverse watertight cable according to claim 1, characterized in that: the tensile layer (43) is made of high modulus fiber double-layer forward and reverse winding. 6. The zero-buoyancy photoelectric composite transverse watertight cable according to claim 1, characterized in that the foam layer (44) is made of foamed polyurethane. 7. A method for making the zero-buoyancy photoelectric composite transverse watertight cable according to any one of claims 1 to 6, characterized in that: it has the following steps: The step of making the wire, the silver-plated copper wire is twisted into a conductor, and the conductor is extruded and wrapped with the first cross-linked polyethylene insulator; The step of making the optical fiber, the single-mode optical fiber is provided with a stainless steel bundle tube, and the stainless steel bundle tube is extruded with a sheath; In the cable-forming step, a cable-forming machine with untwisting function is used to arrange and twist the conductors, optical fibers, ground wires and solid fillers in a clockwise direction to form a cable. Around the cladding, the covering rate is not less than 30%; the step of extruding the inner sheath; In the step of winding the tensile layer, use at least 36 coils and cages to wind the first layer of tensile layer, the winding direction is left, the angle between the fiber rope and the cable axis should be controlled between 30 and 45°, and To achieve 100% coverage, at the same time loosely wind the aramid fiber; the same equipment and control method are used to wind the second tensile layer, and the winding direction is right; The step of extruding the foam layer. In this step, a large inner diameter and large width tray is used to take up the wire to prevent the foam layer from being squeezed and deformed by force. The ratio of the outer diameter to the inner diameter of the tray is 2:1.6 ; Steps for extruding the outer sheath. 8. The method for making a zero-buoyancy photoelectric composite transverse watertight cable according to claim 7, characterized in that: A layer of polyether polyurethane is extruded outside the foam layer to form an outer sheath to protect the foam layer and withstand a lateral water pressure of 40 MPa. In this step, an extrusion mold is used to extrude to make the thickness small and the outer diameter fluctuate after extrusion. The range is small, smooth and round. The extrusion mold has an inner mold and a stepped outer mold. The inner mold has a channel. The channel has a closed conical section and a columnar section arranged in sequence. There is a flow channel between the inner mold and the stepped outer mold. , The outer wall of the flow channel is provided with a buffer structure, and the buffer chamfer in the buffer structure is 160-170 degrees. The side wall roughness of the flow channel is 0.6-0.9 μm. 9. A use of the zero-buoyancy photoelectric composite transverse watertight cable prepared by the manufacturing method according to claim 7 or 8, characterized in that it is applied to underwater sonar equipment.

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