CN217847500U - Waterproof flexible cable for underwater operation - Google Patents

Abstract

The utility model discloses an underwater operation waterproof flexible cable, which comprises a longitudinally extended cable core, wherein the gap of the cable core is filled with water-blocking yarns, and a waterproof layer, an inner protective layer, a reinforcing layer and an outer protective sleeve are sequentially arranged outside the cable core; on the cross section vertical to the longitudinal direction, the cable core comprises at least two power wire cores and at least one group of control wire core units, and the power wire cores and the control wire core units are arranged at intervals; the cable core still is equipped with the shielding layer outward, the shielding layer sets up at the waterproof layer inboard. The utility model discloses a high pressure in the underwater operation environment can be born to the cable, can satisfy the frequent crooked removal of equipment during underwater operation again, guarantees cable and underwater operation equipment safety efficient work to can prolong the live time of equipment under the deep water environment.

Description

Waterproof flexible cable for underwater operation

Technical Field

The utility model relates to a wire and cable technical field, concretely relates to waterproof flexible cable of underwater operation.

Background

With the great promotion of modern construction in China, electric energy plays a very important role in the industrial production field and the life of residents. The wire and cable are important media indispensable in the links of electric energy transmission and supply as the 'blood vessel' for bearing electric energy transmission. When underwater operation is carried out, the breakdown of the insulation of the cable after water enters the cable is a common reason that the cable loses the electric energy transmission function and fails, and the personal and property safety can be seriously threatened even. Due to the nature of the cable itself (including unreasonable structural design, aging of the insulating sheath material, corrosion, etc.), mechanical damage to the insulating sheath material, or irregular handling by the cabling operator, there is a risk of water ingress into the cable conductors.

The Chinese utility model patent publication No. CN214279636U discloses a tensile and waterproof rubber jacketed flexible cable, which comprises a conductor, a flexible steel wire is arranged at the center of the conductor, the outer surface of the conductor is coated with an insulating layer to form an insulating wire core, and a plurality of insulating wire cores are twisted into a cable core; the gaps of the cable core are filled with water-blocking yarns, and a water-blocking tape is wound outside the cable core; an inner sheath is extruded outside the water-blocking tape, a waterproof outer sheath is arranged outside the inner sheath, and a fiber woven reinforcing layer is arranged between the inner sheath and the outer sheath. The utility model discloses a can satisfy the user to the tensile requirement of cable, it is waterproof to do simultaneously. The tensile property of the cable is obviously enhanced by adding the soft steel wire at the center of the conductor and designing the fiber braided reinforced layer structure, so that the use safety of the cable is improved; the water-blocking yarns and the water-blocking tapes are used for preventing water from invading the insulating layer during cabling; due to the use of the TPE thermoplastic elastomer sheath, the flexibility of the cable is improved while the cable is waterproof. And in fact, the TPE thermoplastic elastomer sheath is high to the coefficient of penetration of water, and waterproof performance is not outstanding, and this utility model's cable still has higher risk of intaking.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a waterproof flexible cable of underwater operation, this cable can bear the high pressure in the underwater operation environment, can satisfy the frequent bending removal of equipment during underwater operation again, guarantees cable and underwater operation equipment safety efficient work to can prolong the live time of equipment under the deep water environment.

In order to realize the purpose, the utility model discloses the technical scheme who adopts is:

a waterproof flexible cable for underwater operation comprises a longitudinally extending cable core, wherein water-blocking yarns are filled in gaps of the cable core, and a waterproof layer, an inner protection layer, a reinforcing layer and an outer sheath are sequentially arranged outside the cable core; the structure is characterized in that: on the cross section vertical to the longitudinal direction, the cable core comprises at least two power wire cores and at least one group of control wire core units, and the power wire cores and the control wire core units are arranged at intervals; the cable core still is equipped with the shielding layer outward, the shielding layer sets up at the waterproof layer inboard.

The water-blocking yarn has smooth and clean appearance, uniform thickness, soft texture and good chemical stability, and has good compatibility with other materials in the cable, and the water-blocking yarn can fully fill the gap during cabling. Most importantly, the water-blocking yarn fibers are provided with the expansion powder, and when water vapor passes through each layer of blocking and invades the cable core, the expansion powder can quickly absorb water to form gel, so that all possible water seepage channels are blocked, and the completely reliable sealing and waterproof performance is provided. The control wire cores are arranged in groups, and the power wire cores and the control wire cores are arranged at intervals, so that the cable core structure is symmetrical and more round, the filling is full, the stress of the cable is uniform, and the stress concentration phenomenon is avoided; the outer diameter of the finished cable is small, the outer layer structural material is saved, the weight of the cable is reduced, assembly and movement are facilitated, and the installation cost is saved. The shielding layer can be formed by wrapping an aluminum-plastic composite belt on the cable core, the aluminum-plastic composite belt can tighten the cable core, an electric field generated by the cable core can be uniform, and the shielding layer also has the functions of water resistance and moisture resistance, and blocks water molecules in a gel layer of the waterproof layer to protect the normal work of the cable. The waterproof cable comprises a cable core, a waterproof layer, an inner protective layer and an outer protective sleeve, wherein the cable core is internally provided with a waterproof yarn, a waterproof layer outside the cable core, the inner protective layer and the outer protective sleeve form a four-layer waterproof structure, the outermost two layers (the inner protective layer and the outer protective sleeve) can prevent water from permeating into the inner layer to the maximum extent, and the waterproof yarn and the waterproof layer can block a small amount of water vapor invading the cable core under the action of severe environment and external force, so that the water vapor can be attached to the waterproof yarn and the waterproof layer to form gel, and the water vapor can be prevented from invading the conductive wire core. Each layer of the cable is reasonably arranged, and the continuous normal work of the cable in underwater operation is effectively guaranteed.

Preferably, the outer sheath is made of a polyvinyl chloride mixture material. The polyvinyl chloride mixture material is a commercial product, has a low transmission coefficient for water, and is cold-resistant and soft. In the aspect of mechanical property, the tensile strength is more than or equal to 12.5MPa, and the elongation at break is more than or equal to 300 percent. The lower transmission coefficient greatly reduces the infiltration of moisture, and the higher tensile strength and the elongation at break enable the cable to be more tensile and bend resistant. The excellent waterproof performance is ensured, and simultaneously, the good mechanical flexibility is also considered, so that the cable can work efficiently, safely and durably along with equipment in a deep water environment.

Preferably, a plurality of vulcanized filling strips are arranged in the water blocking yarn. The vulcanized filling strips can effectively fill gaps of the cable core, so that the cable core is more compact and round.

Preferably, the centers of the vulcanized filling strips and the power wire core are respectively provided with an aramid rope. The aramid fiber rope has high strength and high modulus, and can bear the stress borne by the cable core when the cable is stressed, so that the tensile strength of the cable is enhanced.

In order to further enhance the tensile strength of the cable, preferably, a reinforcing part is arranged at the center of the cable core, and the reinforcing part is formed by twisting a plurality of aramid ropes.

Specifically, every group the control sinle silk unit includes three or more control sinle silks, the control sinle silk includes control sinle silk metallic conductor, control sinle silk insulating layer is crowded package in the outside of control sinle silk metallic conductor. The control wire core metal conductor can be formed by twisting a plurality of copper single wires in a bundle mode, and a small-pitch-diameter-ratio homodromous twisting mode is adopted.

Specifically, the power sinle silk includes power sinle silk metallic conductor, power sinle silk metallic conductor's the outside is around package polyester area and crowded package power sinle silk insulating layer in proper order. And the power wire core metal is wrapped with a polyester tape after being bunched and re-twisted, and the polyester tape can be used for binding the power wire core metal conductor to be loose. The polyester belt can be made of a PET film material, the PET film can be melted and disappear after meeting high temperature, the power core metal conductor can be bound to be not loose in the early stage, the internal friction force between the power core metal conductor and the power core insulating layer can be reduced after the PET film is melted and disappears in the later stage, a sufficient sliding space is formed between the power core metal conductor and the power core insulating layer, and the bending resistant effect of the power cable can be further improved.

Preferably, the shielding layer is formed by lapping an aluminum-plastic composite tape, and the waterproof layer is formed by lapping a water-blocking tape. When the cable is damaged by external force and water enters, the high-water-absorption powder contained in the water-blocking tape can absorb the water, the water-blocking tape rapidly expands after absorbing the water and forms gel, and water molecules cannot pass through the gel layer, so that the water is prevented from flowing to the inner layer. The aluminum-plastic composite belt can tighten the cable core, can even the electric field generated by the cable core, and has the functions of water resistance and moisture resistance, and water molecules are blocked in the gel layer of the waterproof layer, so that the normal work of the cable is protected.

Preferably, the inner sheath layer is made of a chlorinated polyethylene elastomer mixture material. The chlorinated polyethylene elastomer mixture material is a commercial product and has good ozone resistance, weather resistance, thermal aging resistance, oil resistance and solvent resistance; compared with the plastic deformation generated by the traditional crosslinked polyethylene plastic, the elastic body material is easier to recover, so that the cable is softer; the elastomer material has a wider applicable temperature range, and can still maintain excellent physical and mechanical properties in a low-temperature underwater environment.

Preferably, the reinforcing layer is formed by bidirectionally knitting aramid yarn ropes, and the knitting density is not less than 60%. The reinforcing layer is arranged, so that the cable can bear large bending and tensile stress in a moving state, the core of the cable is concentrated by small stress, and the normal work of the cable is protected.

Compared with the prior art, the beneficial effects of the utility model are as follows:

1. the underwater operation waterproof flexible cable has the advantages that the control wire cores in the cable core are arranged in groups, and the power wire cores and the control wire cores are arranged at intervals, so that the cable core structure is symmetrical and more round, the filling is full, the stress of the cable is uniform, and the phenomenon of stress concentration is avoided; the outer diameter of the finished cable is small, the outer layer structural material is saved, the weight of the cable is reduced, assembly and movement are facilitated, and the installation cost is saved.

2. The utility model discloses a cable core can be tightened to the shielding layer among the waterproof flexible cable of underwater operation, and the electric field that can even cable core production again has dampproofing and waterproofing's function concurrently still, blocks the hydrone in the gel layer of waterproof layer, and the protection cable normally works.

3. The utility model discloses a waterproof flexible cable of underwater operation, establish the yarn that blocks water in the cable core, the outer waterproof layer of cable core, four layers waterproof construction are constituteed to interior sheath and oversheath, prevent the infiltration of water to the inlayer at outermost two-layer (interior sheath, oversheath) furthest, and the yarn and the waterproof layer that block water can block because of adverse circumstances, a small amount of aqueous vapor of cable core is invaded under the exogenic action, make it adhere to the yarn that blocks water, on the waterproof layer, form the gel, prevent that the aqueous vapor from invading the conductive core, cable each layer rational in infrastructure range, effectively guarantee that the cable lasts normal work when underwater operation.

4. The utility model discloses a waterproof flexible cable of underwater operation is equipped with the tensile between cable core and the vulcanization packing strip center, interior sheath and the oversheath and strengthens original paper aramid fiber rope, and the stress that reducible conductive core received has improved the tensile ability of whole cable, prevents that the cable from appearing the condition of opening circuit, short circuit in the motion process, has increased the life of cable.

Drawings

Fig. 1 is a schematic structural diagram of a waterproof flexible cable for underwater operation.

In the figure

The cable comprises a cable core 1, a cable core 11, a power wire core 111, a power wire core metal conductor 112, a polyester tape 113, a power wire core insulating layer 12, a control wire core unit 121, a control wire core 1211, a control wire core metal conductor 1212, a control wire core insulating layer 13, a vulcanized filling strip 14, a water-blocking yarn 15, an aramid rope 16, a reinforcing piece 2, a shielding layer 3, a waterproof layer 4, an inner protective layer 5, a reinforcing layer 5 and an outer protective sleeve 6.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict. For convenience of description, the words "upper", "lower", "left" and "right" in the following description are used only to indicate the correspondence with the upper, lower, left and right directions of the drawings, and do not limit the structure.

As shown in fig. 1, the underwater waterproof flexible cable includes a longitudinally extending cable core 1, a shielding layer 2, a waterproof layer 3, an inner sheath layer 4, a reinforcing layer 5 and an outer sheath 6. The cable core 1 is formed by right cabling and twisting of three power wire cores 11 and two groups of control wire core units 12, and each group of control wire core units 12 comprises three control wire cores 121. During twisting, a group of reinforcing pieces 16 formed by twisting seven aramid ropes 15 are arranged at the center of the cable core 1. A plurality of vulcanized filling strips 13 and water-blocking yarns 14 are arranged around the cable core 1, and gaps are fully filled. The vulcanized filling strips 13 are internally provided with aramid ropes 15, the vulcanized filling strips 13 are made of a mixture material of natural rubber and styrene-butadiene rubber, and the water blocking yarns 14 are composed of reinforcing ribs such as nylon or polyester and expansion powder containing polyacrylate.

The power sinle silk 11 includes power sinle silk metallic conductor 111, power sinle silk metallic conductor 111's the outside is wrapped polyester tape 112 and is crowded package power sinle silk insulating layer 113 in proper order, the center of power sinle silk 11 is equipped with aramid fiber rope 15. The power wire core metal conductor 111 is made of annealed soft copper monofilaments with the diameter of 0.382mm, the soft copper monofilaments are stranded to form a plurality of strands, the strands are wound on the aramid fiber rope 15 in a wrapping mode and then wrapped with the polyester belt 112, and the power wire core insulating layer 113 is arranged on the outer layer of the polyester belt 112 to form the power wire core 11. The power wire core insulating layer 113 is made of an IE4 type ethylene propylene rubber mixture which can resist the temperature of 90 ℃ and has high volume resistivity, and the polyester belt 114 is made of a special PET film material. The twisting direction of the power wire core metal conductor 111 is the right direction, and the twisting pitch diameter ratio is smaller. The control wire core 121 comprises a control wire core metal conductor 1211, and a control wire core insulating layer 1212 is extruded outside the control wire core metal conductor 1211. The control wire core metal conductor 121 is formed by right-hand binding and twisting of annealed soft copper wires with the diameter of phi 0.2mm, and the control wire core insulating layer 1212 is formed by temperature resistance of 90℃,High volume resistivity IE4 type ethylene propylene rubber mixtures. The shielding layer 2 is a layer of aluminum-plastic composite tape, and the overlapping rate is more than or equal to 25 percent. The waterproof layer 3 is a layer of water-blocking tape, and the covering rate is more than or equal to 50%. The inner protective layer 4 is made of chlorinated polyethylene elastomer mixture which has good ozone resistance, weather resistance, thermal aging resistance, oil resistance and solvent resistance. The reinforcing layer 5 is formed by bidirectionally weaving high-strength aramid fiber ropes 15, and the weaving density is not less than 60%. The outer sheath 6 is made of cold-resistant soft special PVC material, the tensile strength is more than or equal to 12.5MPa, and the elongation at break is more than or equal to 300%. The outer sheath 6 has high tensile strength and elongation at break H ₂ The O has low transmission coefficient, good mechanical property and excellent waterproof property. Meanwhile, the cold resistance of the cable ensures that the sheath is not embrittled and cracked when the cable moves in an underwater low-temperature environment, and the cable still has higher flexibility.

The above-mentioned embodiments are to be construed as illustrative and not limitative of the remainder of the disclosure, and it is to be understood that various equivalent modifications can be made without departing from the spirit and scope of the disclosure as set forth in the appended claims.

Claims (8)

1. A waterproof flexible cable for underwater operation comprises a cable core (1) extending longitudinally, water-blocking yarns (14) are filled in gaps of the cable core (1), and a waterproof layer (3), an inner protective layer (4), a reinforcing layer (5) and an outer sheath (6) are sequentially arranged outside the cable core (1); the method is characterized in that: on a cross section vertical to the longitudinal direction, the cable core (1) comprises at least two power wire cores (11) and at least one group of control wire core units (12), wherein the power wire cores (11) and the control wire core units (12) are arranged at intervals; the cable core (1) is also provided with a shielding layer (2), and the shielding layer (2) is arranged on the inner side of the waterproof layer (3).

2. The underwater operation waterproof flexible cable according to claim 1, characterized in that: a plurality of vulcanized filling strips (13) are arranged in the water blocking yarn (14).

3. The underwater waterproof flexible cable of claim 2, wherein: the centers of the vulcanization filling strip (13) and the power wire core (11) are both provided with aramid ropes (15).

4. The underwater waterproof flexible cable of claim 3, wherein: the cable comprises a cable core (1) and is characterized in that a reinforcing piece (16) is arranged at the center of the cable core (1), and the reinforcing piece (16) is formed by stranding a plurality of aramid fiber ropes (15).

5. The underwater operation waterproof flexible cable according to claim 1, characterized in that: each group of the control wire core units (12) comprises three or more control wire cores (121), each control wire core (121) comprises a control wire core metal conductor (1211), and a control wire core insulating layer (1212) is extruded outside each control wire core metal conductor (1211).

6. The underwater operation waterproof flexible cable according to claim 1, characterized in that: the power cable core (11) comprises a power cable core metal conductor (111), and the outside of the power cable core metal conductor (111) is sequentially wrapped with a polyester tape (112) and a power cable core insulating layer (113) in an extruding mode.

7. The underwater waterproof flexible cable according to claim 1, characterized in that: the shielding layer (2) is formed by lapping an aluminum-plastic composite tape in an overlapping mode, and the waterproof layer (3) is formed by lapping a water-blocking tape in an overlapping mode.

8. The underwater waterproof flexible cable according to claim 1, characterized in that: the reinforcing layer (5) is formed by bidirectionally weaving aramid yarn ropes, and the weaving density is not less than 60%.

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