Longitudinal watertight cable for large-depth deep sea

Abstract

The invention discloses a longitudinal watertight cable for large-depth deep sea, which sequentially comprises a protective layer, a shielding layer, a water-blocking wrapping tape layer, a water-blocking glue layer and a plurality of core wires from outside to inside, and is characterized in that each core wire comprises an insulating layer and a conductor, and the insulating layer and the protective layer are made of polyethylene. The cable is provided with the polyethylene sheath, and the chlorosulfonated polyethylene sheath is arranged outside the polyethylene sheath, so that good protection can be realized. And the cable is provided with the water-blocking glue and the water-blocking wrapping tape layer, so that the cable has good waterproof and corrosion-resistant performance. And the cable can stably sink into the seabed through self weight, and is gradually buried into sediment at the seabed, so that the cable is buried by the sediment, and the cable is better protected.

Description

Technical Field

[0001] The present invention relates to the technical field of cables, and more particularly to a longitudinal watertight cable for deep sea use at great depths. Background Art

[0002] With the rapid development of marine resource development, deep-sea exploration, and underwater communication technologies, the performance requirements for deep-sea cables are increasing. Deep-sea cables can be used for communications, power transmission, and various deep-sea equipment. Furthermore, deep-sea cables face greater challenges during both initial installation and subsequent operation.

[0003] Submarine cables, especially those used at great depths in the deep sea, require excellent resistance to pressure, tension, corrosion, and microbial attack. Furthermore, submarine cables are ideally buried within the seabed's sediment to avoid intrusion by fish and the nets, anchors, and other objects used by fishing vessels. Furthermore, cables located on the seabed and exposed to seawater are susceptible to ocean currents, which can disrupt the cables and cause adverse effects. However, handling buried cables in sediment is difficult and costly. Summary of the Invention

[0004] The present invention aims to overcome the defects of the prior art and provide a longitudinal watertight cable for deep sea use at great depths.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solution: a cable, which includes, from the outside to the inside, a protective layer, a shielding layer, a water-blocking wrapping tape layer, a water-blocking adhesive layer and multiple core wires, wherein the core wire includes an insulating layer and a conductor, and the insulating layer and the protective layer are both made of polyethylene.

[0006] Furthermore, it also includes an outer protective cover; the outer protective cover includes a main body part that wraps the protective layer and two wrapping parts that are fixedly connected to the main body part, and a first installation space is formed between the main body part and the two wrapping parts; the wrapping part includes a side wrapping plate, a bottom wrapping plate and a limiting protrusion fixedly connected to 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 wrapping layer that wraps the first counterweight block, and side protrusions are fixedly connected to both sides of the first wrapping layer. The first wrapping layer is also fixedly connected to two side baffles, and a second installation space is formed between the first wrapping layer and the two side baffles, and a second counterweight unit is installed in the second installation space, the second counterweight unit includes a second counterweight block and a second wrapping layer that wraps the second counterweight block; two support airbags are installed in the first installation space, and the two support airbags are located on both sides of the first configuration unit, and the support airbags are located between the limiting protrusions, the side wrapping plates, the side protrusions, the first wrapping layer and the side baffles.

[0007] Furthermore, the portion of the supporting airbag that contacts the side protrusion is bonded and fixed to the side protrusion.

[0008] Therefore, the support airbag is bonded and fixed to the side protrusion, so that the support airbag can provide more stable support to the first counterweight unit when it is inflated.

[0009] Furthermore, the adhesive used between the support airbag and the side protrusion is a high-strength and durable adhesive.

[0010] Furthermore, it also includes a detection unit, which includes a temperature measuring optical fiber, a first connecting belt connected to the temperature measuring optical fiber, and a second connecting belt connected to the temperature measuring optical fiber; the main body has a first accommodating groove, a second accommodating groove connected to the first accommodating groove, and a connecting groove connecting the second accommodating groove and the first installation space, a part of the first connecting belt is fixedly connected to the wall of the first accommodating groove, the temperature measuring optical fiber is located in the second accommodating groove, the second connecting belt passes through the connecting groove, and a part of the second connecting belt is fixedly connected to the first cladding; a third connecting belt located in the second installation space is connected between the first cladding and the second cladding.

[0011] Furthermore, a portion of the first connecting belt is bonded and fixed to the wall of the first accommodating groove.

[0012] Furthermore, the adhesive used in the first connecting belt is a high-strength and durable adhesive.

[0013] Furthermore, a portion of the second connecting tape is bonded and fixed to the first cladding layer.

[0014] Furthermore, the adhesive used in the second connecting belt is a high-strength and durable adhesive.

[0015] In some embodiments, a portion of the first connecting band is fixedly connected to a wall of the first accommodating groove by a first bolt.

[0016] In some embodiments, a portion of the second connecting strap is fixed to the first envelope by a second bolt.

[0017] Furthermore, the first connecting belt extends along the length direction of the cable.

[0018] Furthermore, the second connecting belt extends along the length direction of the cable.

[0019] Furthermore, the third connecting belt extends along the length direction of the cable.

[0020] Furthermore, a portion of the third connecting belt is fixed to the first cladding layer, and a portion of the third connecting belt is fixed to the second cladding layer.

[0021] Furthermore, a portion of the third connecting belt is bonded and fixed to the first cladding layer, and a portion of the third connecting belt is bonded and fixed to the second cladding layer.

[0022] Furthermore, the adhesive used at the third connecting belt is a high-strength and durable adhesive.

[0023] In some embodiments, a portion of the third connecting belt is fixed to the first envelope by bolts, and a portion of the third connecting belt is fixed to the second envelope by bolts.

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

[0025] Furthermore, 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 communicating groove is L-shaped.

[0026] Furthermore, the first connecting belt is folded in the first accommodating groove.

[0027] Furthermore, the second connecting belt is folded in the first installation space.

[0028] Furthermore, the third connecting belt is folded in the second installation space.

[0029] Therefore, the first connecting belt, the second connecting belt and the third connecting belt have appropriate widths after being unfolded, so that there is an appropriate distance between the main body and the first counterweight unit, and an appropriate distance between the first counterweight unit and the second counterweight unit.

[0030] Furthermore, one of the two bottom wrapping plates has an embedding limiting groove, and the other bottom wrapping plate has an embedding limiting protrusion that can be embedded in the embedding limiting groove.

[0031] Thus, the two bottom wrapping plates can be embedded and matched between the embedded limiting grooves and the embedded limiting protrusions, so that the two bottom wrapping plates can be closed, thereby stably installing the first counterweight unit in the first installation space.

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

[0033] Furthermore, the supporting airbag extends along the length direction of the cable core.

[0034] Furthermore, the side baffle is connected to a plurality of first expansion plates, and the plurality of first expansion plates are barb-shaped when viewed from a cross section.

[0035] Furthermore, the first expansion plate extends along the length direction of the cable core.

[0036] Furthermore, each side baffle is provided with three first expansion plates.

[0037] Furthermore, a plurality of second expansion plates are connected to the second cladding, and the plurality of second expansion plates are barb-shaped when viewed from a cross section.

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

[0039] Furthermore, the second expansion plate extends along the length direction of the cable core.

[0040] Furthermore, the side wrapping plates, the bottom wrapping plates and the limiting protrusions extend along the length direction of the core wire.

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

[0042] Furthermore, the side baffles extend along the length direction of the core wire.

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

[0044] Therefore, the limiting protrusion can better cooperate with the supporting airbag.

[0045] Furthermore, the cross section of the outer sheath is in the shape of an inverted teardrop.

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

[0047] Furthermore, the rubber coating 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, a first connecting tape and a second connecting tape can be prepared separately and fixedly connected to each other by adhesive.

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

[0050] Furthermore, the first counterweight is a lead block or a concrete block; the second counterweight is a lead block or a concrete block.

[0051] Beneficial effects:

[0052] 1. The cable of the present application has a polyethylene sheath with a chlorosulfonated polyethylene sheath outside the polyethylene sheath, thereby providing excellent protection. Furthermore, it has a water-blocking adhesive and a water-blocking wrapping tape layer, thus having excellent waterproof and corrosion resistance, and can be used in deep-sea environments.

[0053] 2. The cable of the present application can sink steadily to the seabed by its own weight and gradually be buried in the mud and sand of the seabed, so that the cable is buried by the mud and sand, thereby being better protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a first-person perspective diagram of the cable;

[0055] Figure 2 This is an enlarged view of area A;

[0056] Figure 3 This is an enlarged view of area B;

[0057] Figure 4 This is an enlarged view of area C;

[0058] Figure 5 This is an enlarged view of area D;

[0059] Figure 6 is a schematic diagram of the cable cross section;

[0060] Figure 7 This is an enlarged view of area E;

[0061] Figure 8 This is an enlarged view of area F;

[0062] Figure 9 This is an enlarged view of area G;

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

[0064] Explanation of the reference numerals: protective layer 1.1; shielding layer 1.2; water-blocking wrapping tape layer 1.3; water-blocking adhesive layer 1.4; insulating layer 1.5; conductor 1.6; main body 2; first installation space 2.1; first accommodating groove 2.2; connecting 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 block 4.1; first cladding layer 4.2; side protrusion 4.3; side baffle 4.4; third connecting belt 4.5; first expansion plate 4.6; second counterweight block 5.1; second cladding layer 5.2; second expansion plate 5.3; supporting airbag 6; temperature measuring optical fiber 7.1; first connecting belt 7.2; second connecting belt 7.3. DETAILED DESCRIPTION

[0065] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0066] The present invention provides a longitudinal watertight cable for deep sea use at great depths as shown in the figure, which comprises, from the outside to the inside, a protective layer 1.1, a shielding layer 1.2, a water-blocking wrapping tape layer 1.3, a water-blocking adhesive layer 1.4 and a plurality of core wires, wherein the core wire comprises an insulating layer 1.5 and a conductor 1.6, and the insulating layer 1.5 and the protective layer 1.1 are both made of polyethylene. The cable also comprises an outer sheath; the outer sheath comprises a main body 2 wrapping the protective layer 1.1 and two wrapping parts 3 fixedly connected to the main body 2, and a first installation space 2.1 is formed between the main body 2 and the two wrapping parts 3; the wrapping part 3 comprises a side wrapping plate 3.1, a bottom wrapping plate 3.2 and a limiting protrusion 3.3 fixedly connected to the side wrapping plate 3.1; a first counterweight unit is installed in the first installation space 2.1, and the first counterweight unit comprises a first counterweight block 4.1 and a first wrapping layer 4.2 wrapping the first counterweight block 4.1, and both sides of the first wrapping layer 4.2 are fixedly connected There is a side protrusion 4.3, and the first envelope 4.2 is also fixedly connected to two side baffles 4.4. A second installation space is formed between the first envelope 4.2 and the two side baffles 4.4. A second counterweight unit is installed in the second installation space, and the second counterweight unit includes a second counterweight block 5.1 and a second envelope 5.2 that wraps the second counterweight block 5.1; two support airbags 6 are installed in the first installation space 2.1, and the two support airbags 6 are located on both sides of the first configuration unit. The support airbags 6 are located between the limiting protrusion 3.3, the side wrapping plate 3.1, the side protrusion 4.3, the first envelope 4.2 and the side baffles 4.4. The cable also includes a detection unit, which includes a temperature measuring optical fiber 7.1, a first connecting belt 7.2 connected to the temperature measuring optical fiber 7.1, and a second connecting belt 7.3 connected to the temperature measuring optical fiber 7.1; the main body 2 has a first accommodating groove 2.2, a second accommodating groove connected to the first accommodating groove 2.2, and a connecting groove 2.3 connecting the second accommodating groove and the first installation space 2.1, a portion of the first connecting belt 7.2 is fixedly connected to the wall of the first accommodating groove 2.2, the temperature measuring optical fiber 7.1 is located in the second accommodating groove, the second connecting belt 7.3 passes through the connecting groove 2.3, and a portion of the second connecting belt 7.3 is fixedly connected to the first cladding 4.2; a third connecting belt 4.5 located in the second installation space is connected between the first cladding 4.2 and the second cladding 5.2.

[0067] The first accommodating groove 2.2, the second accommodating groove, and the connecting groove 2.3 extend along the length of the cable core; the first accommodating groove 2.2 has a strip-shaped cross-section, the second accommodating groove has a circular cross-section, and the connecting groove 2.3 has an L-shaped cross-section; the first connecting strap 7.2 is folded within the first accommodating groove 2.2, the second connecting strap 7.3 is folded within the first installation space 2.1, and the third connecting strap 4.5 is folded within the second installation space. One of the two bottom wrapping plates has an embedded limit groove, and the other bottom wrapping plate has an embedded limit protrusion 3.4 that can be embedded in the embedded limit groove. The support airbag 6 extends along the length of the cable core. The side baffle 4.4 is connected to multiple first expansion plates 4.6, which, when viewed in cross-section, have a barb-like shape. The second cladding 5.2 is connected to multiple second expansion plates 5.3, which, when viewed in cross-section, have a barb-like shape. The temperature measuring optical fiber 7.1 has a rubber coating, the first connecting belt 7.2 and the second connecting belt 7.3 are made of rubber material. The first counterweight block 4.1 is a lead block or a concrete block; the second counterweight block 5.1 is a lead block or a concrete block.

[0068] Working Principle: The cable of the present application has excellent water-blocking properties due to its water-blocking adhesive layer and water-blocking wrapping tape layer. Furthermore, the polyethylene sheath is also provided with a chlorosulfonated polyethylene sheath, resulting in excellent mechanical properties and corrosion resistance. In the initial state, the support airbag is inflated, and with the support of the support airbag and the cooperation of the embedded limiting protrusions and embedded limiting grooves of the two bottom wrapping plates, the first counterweight unit can be stably located in the first installation space, and the second counterweight unit can be stably located in the second installation space. When laying the cable, due to the first counterweight block and the second counterweight block configured on the cable, the cable has a larger deadweight, so the cable can sink well to the seabed by relying on its own weight, and the first counterweight block and the second counterweight block have a larger deadweight. Therefore, since the mud and sand on the seabed are relatively soft, with the effect of the deadweight of the first counterweight block and the second counterweight block, and the supporting airbag will gradually leak and shrink over time, the first counterweight unit and the second counterweight unit will gradually move downward, the two wrapped parts will bend outward and open, and the limiting embedding protrusion will fall off from the limiting embedding groove, and the first counterweight unit will be separated from the first installation space. And due to the gravity of the second counterweight unit, the two side baffles will also bend outward and open, so that the second counterweight unit will also fall off from the second installation space, so that the first counterweight block and the second counterweight block will be buried deeper in the mud and sand, and the entire cable will be buried in the mud and sand with them, and the first expansion plate and the second expansion plate (the second expansion plate will expand outward after it detaches from the second installation space) will be deeply embedded in the mud and sand, and the barbed structure makes it difficult to be pulled out of the mud and sand, so that the position of the first counterweight unit, the second counterweight unit and the outer sheath as a whole in the mud and sand is more stable.

[0069] As the first and second counterweight units move downward, they pull the temperature-sensing fiber out of the second receiving groove. This causes the fiber to initially be closer to the core cable, resulting in a higher measured temperature. However, as the support airbag deflates, the fiber is pulled farther from the core cable, causing the overall measured temperature to drop. Based on the measured values (which are significantly lower than the initial temperature of the cable), it can be determined whether the first and second counterweight units are buried in the sand, and the fiber can be pulled out of the second receiving groove (this indicates that the first and second counterweight units are buried). Because the temperature-sensing fiber can measure temperature at multiple points along its length, if a high temperature is still measured at a particular section, it indicates that the fiber has not been properly pulled out of the second receiving groove (indicating that the first and second counterweight units in this section may not be properly buried in the sand). This provides a warning, allowing for manual intervention to rebury the cable as needed.

[0070] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. A longitudinal watertight cable for deep sea use, characterized in that: From the outside to the inside, it includes a protective layer, a shielding layer, a water-blocking wrapping tape layer, a water-blocking adhesive layer and multiple core wires. The core wires include an insulating layer and a conductor. The insulating layer and the protective layer are both made of polyethylene.

2. The longitudinal watertight cable for deep sea use according to claim 1, characterized in that: It also includes an outer protective cover; the outer protective cover includes a main body part that wraps the protective layer and two wrapping parts that are fixedly connected to the main body part, and a first installation space is formed between the main body part and the two wrapping parts; the wrapping part includes a side wrapping plate, a bottom wrapping plate and a limiting protrusion fixedly connected to 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 wrapping layer that wraps the first counterweight block, and side protrusions are fixedly connected to both sides of the first wrapping layer. The first wrapping layer is also fixedly connected to two side baffles, and a second installation space is formed between the first wrapping layer and the two side baffles, and a second counterweight unit is installed in the second installation space, the second counterweight unit includes a second counterweight block and a second wrapping layer that wraps the second counterweight block; two support airbags are installed in the first installation space, and the two support airbags are located on both sides of the first configuration unit, and the support airbags are located between the limiting protrusions, the side wrapping plates, the side protrusions, the first wrapping layer and the side baffles.

3. The longitudinal watertight cable for deep sea use according to claim 2, characterized in that: It also includes a detection unit, which includes a temperature measuring optical fiber, a first connecting belt connected to the temperature measuring optical fiber, and a second connecting belt connected to the temperature measuring optical fiber; the main body has a first accommodating groove, a second accommodating groove connected to the first accommodating groove, and a connecting groove connecting the second accommodating groove and the first installation space, a part of the first connecting belt is fixedly connected to the wall of the first accommodating groove, the temperature measuring optical fiber is located in the second accommodating groove, the second connecting belt passes through the connecting groove, and a part of the second connecting belt is fixedly connected to the first cladding; a third connecting belt located in the second installation space is connected between the first cladding and the second cladding.

4. The longitudinal watertight cable for deep sea use at great depths according to claim 2, characterized in that: The first accommodating groove, the second accommodating groove and the connecting 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 connecting 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.

5. The longitudinal watertight cable for deep sea use at great depths according to claim 2, characterized in that: One of the two bottom wrapping plates has an embedding limiting groove, and the other bottom wrapping plate has an embedding limiting protrusion that can be embedded in the embedding limiting groove.

6. The longitudinal watertight cable for deep sea use at great depths according to claim 2, characterized in that: The supporting airbag extends along the length direction of the cable core.

7. The longitudinal watertight cable for deep sea use at great depths according to claim 2, characterized in that: The side baffle is connected to a plurality of first expansion plates, and the plurality of first expansion plates are barb-shaped when viewed from a cross section.

8. The longitudinal watertight cable for deep sea use according to claim 2, characterized in that: The second cladding is connected to a plurality of second expansion plates, and the plurality of second expansion plates are barb-shaped when viewed from a cross section.

9. The longitudinal watertight cable for deep sea use at great depths according to claim 3, characterized in that: The temperature measuring optical fiber has a rubber cladding, and the first connecting belt and the second connecting belt are made of rubber material.

10. The longitudinal watertight cable for deep sea use according to claim 2, characterized in that: The first counterweight is a lead block or a concrete block; the second counterweight is a lead block or a concrete block.

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