A large depth deep sea longitudinal watertight cable

Abstract

The application discloses a longitudinal watertight cable for deep sea with a large depth, which comprises, from outside to inside, a protective layer, a shielding layer, a water-blocking wrapping tape layer, a water-blocking glue layer and a plurality of core wires, wherein the core wires comprise an insulating layer and a conductor, and the insulating layer and the protective layer are both made of polyethylene. The cable has a polyethylene protective layer, and the polyethylene protective layer is further provided with a chlorosulfonated polyethylene sheath, so that good protection can be achieved. The cable has water-blocking glue and a water-blocking wrapping tape layer, so that the cable has good waterproof and corrosion-resistant performance. The cable can be stably sunk on the seabed by gravity and gradually buried in the silt of the seabed, so that the cable is buried by the silt, and the cable is better protected.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cable, more particularly, to a longitudinal watertight cable for deep sea. BACKGROUND

[0002] With the rapid development of ocean resource development, deep sea exploration and underwater communication technology, the performance requirements of deep sea cable are increasingly improved. Deep sea cable can be used for communication, power transmission and various deep sea equipment. And the cable used in deep sea faces greater challenges in early laying and later use.

[0003] The cable used in the seabed, especially the cable used in deep sea, needs to have good pressure resistance, tensile resistance, corrosion resistance and microbial erosion resistance. And when the submarine cable is used, it is hoped that it can be buried in the silt layer of the seabed, so as to avoid the disturbance of fish and the disturbance of fishing nets, anchors and other fishing equipment during fishing operations. And the cable located in the seabed and exposed to seawater is also easily affected by ocean currents. The flow of seawater will disturb the cable back and forth, which will also have adverse effects. However, the process of burying the cable in the silt layer is difficult and costly. SUMMARY

[0004] The present application aims to overcome the defects of the prior art and provide a longitudinal watertight cable for deep sea.

[0005] In order to achieve the above purpose, the present application provides the following technical scheme: a cable, from outside to inside, includes a sheath, a shielding layer, a water-blocking wrapping tape layer, a water-blocking glue layer and a plurality of core wires, the core wire includes an insulating layer and a conductor, the insulating layer and the sheath are made of polyethylene.

[0006] Further, it further comprises an outer sheath; the outer sheath comprises a main body portion wrapping the sheath and two wrapping portions fixedly connected with the main body portion, a first installation space is formed between the main body portion and the two wrapping portions; the wrapping portion comprises a side wrapping plate, a bottom wrapping plate and a limiting protruding portion fixedly connected with the side wrapping plate; a first counterweight unit is installed in the first installation space, the first counterweight unit comprises a first counterweight block and a first cladding layer wrapping the first counterweight block, the two sides of the first cladding layer are fixedly connected with side protruding portions, the first cladding layer is further fixedly connected with two side baffles, a second installation space is formed between the first cladding layer and the two side baffles, a second counterweight unit is installed in the second installation space, the second counterweight unit comprises a second counterweight block and a second cladding layer wrapping the second counterweight block; two supporting air bags are installed in the first installation space, the two supporting air bags are located on the two sides of the first configuration unit, and the supporting air bag is located between the limiting protruding portion, the side wrapping plate, the side protruding portion, the first cladding layer and the side baffle.

[0007] Further, the part of the supporting air bag abutting against the side protrusion is adhesively fixed with the side protrusion.

[0008] Thus, the supporting air bag is adhesively fixed with the side protrusion, so that the supporting air bag can stably support the first counterweight unit when inflated.

[0009] Further, the adhesive used between the supporting air bag and the side protrusion is high-strength and durable adhesive.

[0010] Further, the detection unit is further included, the detection unit includes a temperature measuring optical fiber, a first connecting band connected with the temperature measuring optical fiber, and a second connecting band connected with the temperature measuring optical fiber; the main body part has a first accommodating groove, a second accommodating groove connected with the first accommodating groove, and a communication groove communicating the second accommodating groove and the first installation space, a part of the first connecting band is fixedly connected with the wall of the first accommodating groove, the temperature measuring optical fiber is located in the second accommodating groove, the second connecting band passes through the communication groove, and a part of the second connecting band is fixedly connected with the first cladding layer; the first cladding layer and the second cladding layer are connected with the third connecting band located in the second installation space.

[0011] Further, a part of the first connecting band is adhesively fixed with the wall of the first accommodating groove.

[0012] Further, the adhesive used at the first connecting band is high-strength and durable adhesive.

[0013] Further, a part of the second connecting band is adhesively fixed with the first cladding layer.

[0014] Further, the adhesive used at the second connecting band is high-strength and durable adhesive.

[0015] In some embodiments, a part of the first connecting band is fixedly connected with the wall of the first accommodating groove through a first bolt.

[0016] In some embodiments, a part of the second connecting band is fixed with the first cladding layer through a second bolt.

[0017] Further, the first connecting band extends along the length direction of the cable.

[0018] Further, the second connecting band extends along the length direction of the cable.

[0019] Further, the third connecting band extends along the length direction of the cable.

[0020] Further, a part of the third connecting band is fixed with the first cladding layer, and a part of the third connecting band is fixed with the second cladding layer.

[0021] Further, a portion of the third connecting band is fixedly bonded with the first cladding, and a portion of the third connecting band is fixedly bonded with the second cladding.

[0022] Further, the bonding glue used in the third connecting band is a high-strength durable bonding glue.

[0023] In some embodiments, a portion of the third connecting band is fixed with the first cladding by means of a bolt, and a portion of the third connecting band is fixed with the second cladding by means of a bolt.

[0024] Further, the first accommodating groove, the second accommodating groove, and the communication groove extend along the length direction of the core wire.

[0025] Further, the cross section of the first accommodating groove is in the shape of a strip, the cross section of the second accommodating groove is in the shape of a circle, and the cross section of the communication groove is in the shape of an L.

[0026] Further, the first connecting band is folded within the first accommodating groove.

[0027] Further, the second connecting band is folded within the first mounting space.

[0028] Further, the third connecting band is folded within the second mounting space.

[0029] Thus, the first connecting band, the second connecting band, and the third connecting band have appropriate widths after being unfolded, so that the main body part and the first counterweight unit have an appropriate distance therebetween, and the first counterweight unit and the second counterweight unit have an appropriate distance therebetween.

[0030] Further, one of the two bottom wrapping plates has an embedded limiting groove thereon, and the other of the two bottom wrapping plates has an embedded limiting protrusion capable of being embedded in the embedded limiting groove.

[0031] Thus, the two bottom wrapping plates can be embeddedly fitted between the embedded limiting groove and the embedded limiting protrusion, so that the two bottom wrapping plates can be closed, thereby stably mounting the first counterweight unit in the first mounting space.

[0032] Further, the embedded limiting groove and the embedded limiting protrusion extend along the length direction of the core wire.

[0033] Further, the supporting air bag extends along the length direction of the core wire.

[0034] Further, the side baffle is connected with a plurality of first expansion plates, and the plurality of first expansion plates are in the shape of barbs as viewed in cross section.

[0035] Further, the first expansion plates extend along the length direction of the core wire.

[0036] Further, each side baffle has three first expansion plates.

[0037] Further, the second cladding is connected with a plurality of second expansion plates, which are barb-shaped in cross section.

[0038] Further, the second cladding has four second expansion plates.

[0039] Further, the second expansion plates extend along the length direction of the cable core.

[0040] Further, the side wrapping plate, the bottom wrapping plate and the limiting protrusion extend along the length direction of the core wire.

[0041] Further, the first counterweight extends along the length direction of the core wire.

[0042] Further, the side baffle extends along the length direction of the core wire.

[0043] Further, the cross section of the limiting protrusion is triangular.

[0044] Thus, the limiting protrusion can better cooperate with the supporting air bag.

[0045] Further, the cross section of the outer sheath is inverted water drop-shaped.

[0046] Further, the temperature measuring optical fiber has a rubber cladding, and the first and second connecting belts are made of rubber material.

[0047] Further, the rubber cladding of the temperature measuring optical fiber and the first and second connecting belts are integrally extruded.

[0048] In other embodiments, after the temperature measuring optical fiber is prepared, the first and second connecting belts can be prepared separately and fixedly connected to each other by adhesive.

[0049] Further, the outer sheath is made of chlorosulfonated polyethylene.

[0050] Further, the first counterweight is a lead block or a concrete block, and the second counterweight is a lead block or a concrete block.

[0051] Advantages:

[0052] 1. The cable of the present application has a polyethylene cladding and an outer chlorosulfonated polyethylene sheath, thereby achieving good protection. Moreover, it has a water-blocking adhesive and a water-blocking wrapping tape layer, thereby having good waterproof and corrosion-resistant properties and being able to be used in deep-sea environments.

[0053] 2. The cable of the present application can be stably settled on the seabed by its own weight and gradually buried in the silt of the seabed, so that the cable is buried by the silt, thereby the cable is better protected. BRIEF DESCRIPTION OF DRAWINGS

[0054] Figure 1 Fig. 1 is a schematic view of the first perspective of the cable;

[0055] Figure 2 Fig. 2 is an enlarged view of the A area;

[0056] Figure 3 Fig. 3 is an enlarged view of the B area;

[0057] Figure 4 Fig. 4 is an enlarged view of the C area;

[0058] Figure 5 Fig. 5 is an enlarged view of the D area;

[0059] Figure 6 Fig. 6 is a schematic view of the cross section of the cable;

[0060] Figure 7 Fig. 7 is an enlarged view of the E area;

[0061] Figure 8 Fig. 8 is an enlarged view of the F area;

[0062] Figure 9 Fig. 9 is an enlarged view of the G area;

[0063] Figure 10 Fig. 10 is an enlarged view of the H area.

[0064] BRIEF DESCRIPTION OF DRAWINGS: Sheath 1.1; Shield layer 1.2; Water-blocking wrapping tape layer 1.3; Water-blocking glue layer 1.4; Insulating layer 1.5; Conductor 1.6; Main body part 2; First installation space 2.1; First containing groove 2.2; Communication groove 2.3; Wrapping part 3; Side wrapping plate 3.1; Bottom wrapping plate 3.2; Limiting protrusion 3.3; Embedded limiting protrusion 3.4; First counterweight 4.1; First wrapping layer 4.2; Side protrusion 4.3; Side baffle 4.4; Third connecting belt 4.5; First expansion plate 4.6; Second counterweight 5.1; Second wrapping layer 5.2; Second expansion plate 5.3; Supporting air bag 6; Temperature measuring optical fiber 7.1; First connecting belt 7.2; Second connecting belt 7.3. DETAILED DESCRIPTION

[0065] Embodiments of the present application are described in detail below with reference to examples illustrated in the accompanying drawings, in which the same or similar components or components having the same or similar functions are denoted by the same or similar reference numerals throughout. The embodiments described below by reference to the accompanying drawings are exemplary and are intended to explain the present application, and cannot be understood as limiting the present application.

[0066] The application provides a longitudinal watertight cable for deep sea with great depth, which comprises, from outside to inside, a sheath 1.1, a shielding layer 1.2, a water-blocking wrapping tape layer 1.3, a water-blocking glue layer 1.4 and a plurality of core wires, wherein the core wires comprise an insulating layer 1.5 and a conductor 1.6, and the insulating layer 1.5 and the sheath 1.1 are both made of polyethylene. The cable further comprises an outer sheath, wherein the outer sheath comprises a main body portion 2 wrapping the sheath 1.1 and two wrapping portions 3 fixedly connected with the main body portion 2, a first installation space 2.1 is formed between the main body portion 2 and the two wrapping portions 3, the wrapping portion 3 comprises a side wrapping plate 3.1, a bottom wrapping plate 3.2 and a limiting protruding portion 3.3 fixedly connected with the side wrapping plate 3.1, a first weight unit is installed in the first installation space 2.1, the first weight unit comprises a first weight block 4.1 and a first cladding layer 4.2 wrapping the first weight block 4.1, the two sides of the first cladding layer 4.2 are fixedly connected with side protruding portions 4.3, the first cladding layer 4.2 is further fixedly connected with two side baffles 4.4, a second installation space is formed between the first cladding layer 4.2 and the two side baffles 4.4, a second weight unit is installed in the second installation space, the second weight unit comprises a second weight block 5.1 and a second cladding layer 5.2 wrapping the second weight block 5.1, two supporting air bags 6 are installed in the first installation space 2.1, and the two supporting air bags 6 are located on the two sides of the first configuration unit, wherein the supporting air bag 6 is located between the limiting protruding portion 3.3, the side wrapping plate 3.1, the side protruding portion 4.3, the first cladding layer 4.2 and the side baffle 4.4. The cable further comprises a detection unit, wherein the detection unit comprises a temperature measuring optical fiber 7.1, a first connecting belt 7.2 connected with the temperature measuring optical fiber 7.1 and a second connecting belt 7.3 connected with the temperature measuring optical fiber 7.1, the main body portion 2 is provided with a first containing groove 2.2, a second containing groove connected with the first containing groove 2.2 and a communication groove 2.3 communicating the second containing groove and the first installation space 2.1, a part of the first connecting belt 7.2 is fixedly connected with the wall of the first containing groove 2.2, the temperature measuring optical fiber 7.1 is located in the second containing groove, the second connecting belt 7.3 passes through the communication groove 2.3, and a part of the second connecting belt 7.3 is fixedly connected with the first cladding layer 4.2, and the first cladding layer 4.2 and the second cladding layer 5.2 are connected with a third connecting belt 4.5 located in the second installation space.

[0067] The first accommodating groove 2.2, the second accommodating groove and the communication groove 2.3 extend along the length direction of the core wire; the cross section of the first accommodating groove 2.2 is in the shape of a strip, the cross section of the second accommodating groove is in the shape of a circle, and the cross section of the communication groove 2.3 is in the shape of L; the first connecting band 7.2 is folded in the first accommodating groove 2.2, the second connecting band 7.3 is folded in the first mounting space 2.1, and the third connecting band 4.5 is folded in the second mounting space. One of the two bottom wrapping plates is provided with an embedded limiting groove, and the other is provided with an embedded limiting protrusion 3.4 capable of being embedded in the embedded limiting groove. The support air bag 6 extends along the length direction of the core wire. A plurality of first expansion plates 4.6 are connected to the side baffle 4.4, and the plurality of first expansion plates 4.6 are in the shape of barbs in cross section. A plurality of second expansion plates 5.3 are connected to the second cladding 5.2, and the plurality of second expansion plates 5.3 are in the shape of barbs in cross section. The temperature measuring optical fiber 7.1 has a rubber cladding, and the first connecting band 7.2 and the second connecting band 7.3 are made of rubber material. The first counterweight 4.1 is a lead block or a concrete block; and the second counterweight 5.1 is a lead block or a concrete block.

[0068] Working principle: the cable of the present application has good water resistance due to the water-blocking adhesive layer and the water-blocking wrapping tape layer. In addition, the polyethylene sheath is provided outside the polyethylene sheath, so that the cable has good mechanical properties and corrosion resistance. In the initial state, the support air bag is full, so that under the support of the support air bag and the cooperation of the embedded limiting protrusion and the embedded limiting groove of the two bottom wrapping plates, the first counterweight unit is stably located in the first mounting space, and the second counterweight unit is stably located in the second mounting space. When laying the cable, the first counterweight and the second counterweight are configured, so that the self-weight of the cable is large, so that the cable can be well sunk to the seabed by relying on the self-weight, and the self-weight of the first counterweight and the second counterweight is large, so that the mud on the seabed is soft, and the first counterweight and the second counterweight are gradually lowered under the action of the self-weight, the two wrapping parts are bent and opened outward, and the limiting embedded protrusion is separated from the limiting embedded groove, and the first counterweight unit is separated from the first mounting space. In addition, due to the gravity of the second counterweight unit, the two side baffles are also bent and opened outward, so that the second counterweight unit is also separated from the second mounting space, so that the first counterweight and the second counterweight are deeply buried in the mud, and the entire cable is also buried in the mud, and the first expansion plate and the second expansion plate (after the second expansion plate is separated from the second mounting space, it will expand outward) will be deeply stuck in the mud, and the barb-shaped structure makes it not easy to be pulled out of the mud, so that the position of the first counterweight unit, the second counterweight unit and the outer sheath in the mud is more stable.

[0069] And with the first and second counterweight units moving down, the temperature measuring fiber will be pulled out of the second accommodating groove, thus the temperature measuring fiber is closer to the core wire, and the measured temperature is higher. But when the supporting air bag is deflated, and the temperature measuring fiber is pulled out to be far away from the core wire, the overall measured temperature will decrease, thus according to the measured value of the temperature measuring fiber (the measured value is obviously lower than the temperature of the cable just after the laying), it can be judged whether the first and second counterweight units have been buried in the sand, and the temperature measuring fiber is pulled out of the second accommodating groove (pulled out, which means that the first and second counterweight units have been buried in the sand). And since the temperature measuring fiber can perform multi-point temperature measurement in the length direction of the temperature measuring fiber, when the temperature measured by a certain section of the temperature measuring fiber is still high, it means that this section of the temperature measuring fiber has not been successfully pulled out of the second accommodating groove (which means that the first and second counterweight units of this section may not have been successfully buried in the sand), thus a reminder can be given, and according to the need, manual intervention can be performed to bury the cable in the sand.

[0070] Although the present application is illustrated and described with reference to preferred embodiments, it is understood that various changes and modifications can be made to the present application without departing from the scope of the claims of the present application.

Claims

1. A longitudinal watertight cable for great depth deep sea use, characterized in that, From outside to inside, it includes a protective layer, a shielding layer, a water-blocking wrapping tape layer, a water-blocking glue layer and a plurality of core wires, the core wire includes an insulating layer and a conductor, the insulating layer and the protective layer are made of polyethylene; It also includes an outer sheath; the outer sheath includes a main body portion wrapping the protective layer and two wrapping portions fixedly connected with the main body portion, a first installation space is formed between the main body portion and the two wrapping portions; the wrapping portion includes a side wrapping plate, a bottom wrapping plate and a limiting protrusion portion fixedly connected with the side wrapping plate; a first counterweight unit is installed in the first installation space, the first counterweight unit includes a first counterweight block and a first cladding layer wrapping the first counterweight block, the two sides of the first cladding layer are fixedly connected with side protrusion portions, the first cladding layer is also fixedly connected with two side baffles, a second installation space is formed between the first cladding layer and the two side baffles, a second counterweight unit is installed in the second installation space, the second counterweight unit includes a second counterweight block and a second cladding layer wrapping the second counterweight block; two support air bags are installed in the first installation space, the two support air bags are located on the two sides of the first configuration unit, the support air bag is located between the limiting protrusion portion, the side wrapping plate, the side protrusion portion, the first cladding layer and the side baffle; It also includes a detection unit, the detection unit includes a temperature measurement optical fiber, a first connecting belt connected with the temperature measurement optical fiber and a second connecting belt connected with the temperature measurement optical fiber; the main body portion has a first accommodating groove, a second accommodating groove connected with the first accommodating groove and a communication groove communicating the second accommodating groove and the first installation space, a part of the first connecting belt is fixedly connected with the wall of the first accommodating groove, the temperature measurement optical fiber is located in the second accommodating groove, the second connecting belt passes through the communication groove, a part of the second connecting belt is fixedly connected with the first cladding layer; the first cladding layer and the second cladding layer are connected with a third connecting belt located in the second installation space.

2. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The first accommodating groove, the second accommodating groove and the communication groove extend along the length direction of the core wire; the cross section of the first accommodating groove is strip-shaped, the cross section of the second accommodating groove is circular, and the cross section of the communication groove is L-shaped; the first connecting belt is folded in the first accommodating groove, the second connecting belt is folded in the first installation space, and the third connecting belt is folded in the second installation space.

3. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, One of the two bottom wrapping plates has an embedded limiting groove, and the other bottom wrapping plate has an embedded limiting protrusion capable of being embedded in the embedded limiting groove.

4. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The support air bag extends along the length direction of the cable core.

5. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The side baffle is connected with a plurality of first expansion plates, which are barb-shaped in cross section.

6. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The second cladding layer is connected with a plurality of second expansion plates, which are barb-shaped in cross section.

7. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The temperature measurement optical fiber has a rubber cladding layer, and the first connecting belt and the second connecting belt are made of rubber material.

8. The large depth deep-sea longitudinal watertight cable according to claim 1, characterized in that, The first counterweight block is a lead block or a concrete block; the second counterweight block is a lead block or a concrete block.

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