A power sub-cable and a cable using the power sub-cable

Abstract

The present invention belongs to the technical field of cables, and discloses a power sub-cable, which is composed of a first sheath, a plurality of reinforcements, a plurality of electrical units and a first optical unit. The first sheath is composed of fourteen reinforcement sheaths and twenty connecting parts. The reinforcement sheath is in a regular octagon. From top to bottom, the fourteen reinforcement sheaths are placed in five layers, and the adjacent layers are connected to each other to form a second cavity. The second cavity is provided with an electrical unit or a first optical unit, and the reinforcement sheath is provided with reinforcements. The present invention has the advantages of simple structure, good protection effect on the electrical unit and the first optical unit, can form a butterfly-shaped unit for indoor wiring, good mechanical properties, and convenient expansion; the present invention also discloses a cable.

Description

Technical Field

[0001] The present invention belongs to the technical field of cables, and in particular relates to a power sub-cable and a cable using the power sub-cable. Background Art

[0002] With the rapid development of the communications and power industries, in addition to the operators' centralized procurement needs, more and more cable demands tend to be personalized.

[0003] The dam of a hydropower station is an important facility for storing water and generating electricity. The dam body bears both its own weight and the water load. The water load of some dams varies greatly.

[0004] As the water load and the geological conditions of the dam change, the dam structure's ability to resist dynamic loads will weaken due to significant changes in geological conditions. Therefore, real-time monitoring of the dam body and foundation is a must-check project in the hydropower industry, and the monitoring data needs to be transmitted to the monitoring system in real time via dedicated cables.

[0005] In the prior art, CN111856666A discloses an externally fixed homogenized strain sensing optical cable, including a single-mode optical fiber as a core, a tight cladding layer is extruded outside the single-mode optical fiber, an armor layer is outside the tight cladding layer, a sheath layer is outside the armor layer, and a plurality of glue-filling areas are arranged at intervals along the length direction of the optical cable. The sheath layer is stripped off the outer periphery of the glue-filling area, and an adhesive is used to fill the glue from the tight cladding to the outside, burying the armor layer and overflowing the sheath layer outward, and a pair of arc-shaped cover plates are matched on the outer side of the glue-filling area to completely cover the glue-filling area and bonded together with the glue-filling area through the overflowed adhesive.

[0006] The above-mentioned prior art has the following drawbacks: 1. It is impossible to expand the cable core; 2. The protection of the optical unit is weak; 3. The mechanical performance is poor. Summary of the invention

[0007] In order to solve the above problems, the purpose of the present invention is to disclose a power sub-cable and a cable using the power sub-cable, which is achieved by adopting the following technical solutions.

[0008] A power sub-cable, consisting of a first sheath, a plurality of strength members, a plurality of electrical units and a first optical unit, wherein the first sheath consists of fourteen strength member sheaths and twenty connecting components, the strength member sheath is in a regular octagon, and the fourteen strength member sheaths are arranged in five layers from top to bottom, the first layer has two strength member sheaths, the second layer has three strength member sheaths, the third layer has four strength member sheaths, the fourth layer has three strength member sheaths, and the fifth layer has two strength member sheaths;

[0009] The two reinforcement sheaths of the first layer are located above the corresponding intervals of the three reinforcement sheaths of the second layer, the three reinforcement sheaths of the second layer are located above the corresponding intervals of the four reinforcement sheaths of the third layer, the three reinforcement sheaths of the fourth layer are located below the corresponding intervals of the four reinforcement sheaths of the third layer, and the two reinforcement sheaths of the fifth layer are located below the corresponding intervals of the three reinforcement sheaths of the fourth layer;

[0010] The first layer of the reinforcement sheath is connected to the corresponding two second layers of reinforcement sheaths adjacent below by a connecting component, the second layer of the reinforcement sheath is connected to the corresponding two third layers of reinforcement sheaths adjacent below by a connecting component, the fourth layer of the reinforcement sheath is connected to the corresponding two third layers of reinforcement sheaths adjacent above by a connecting component, the fifth layer of the reinforcement sheath is connected to the corresponding two fourth layers of reinforcement sheaths adjacent above by a connecting component, a second cavity is formed between the four adjacent reinforcement sheaths, a first cavity is provided in the reinforcement sheath, at least one first optical unit is provided in the second cavity in the middle of the third layer, electrical units are provided in the remaining second cavities, and a reinforcement is provided in the first cavity.

[0011] In the above-mentioned power sub-cable, a plug-in slot is formed between the two reinforcement member sheaths of the first layer, a plug-in slot is formed between the two reinforcement member sheaths of the fifth layer, and the reinforcement member sheaths on the leftmost and rightmost sides of the third layer are plug-in components.

[0012] In the above-mentioned power sub-cable, a second optical unit is provided in the connecting component.

[0013] In the above-mentioned power sub-cable, the material of the first sheath is flame-retardant material.

[0014] In the above-mentioned power sub-cable, the electrical unit is composed of a conductor and an insulating layer extruded outside the conductor.

[0015] In the above-mentioned power sub-cable, the first optical unit is a tight-buffered optical fiber, which is composed of an optical fiber and a tight-buffered layer extruded outside the optical fiber.

[0016] In the above-mentioned power sub-cable, the reinforcement member is phosphated steel wire.

[0017] In the above-mentioned power sub-cable, the width of the connecting component is smaller than the diameter of the inscribed circle of the eight sides of the reinforcement member sheath.

[0018] In the above-mentioned power sub-cable, the second cavity is in the shape of a regular octagon.

[0019] A cable comprising nine of the above-mentioned power sub-cables and a second sheath, wherein the nine power sub-cables form a cable core, and the cable core is located in the second sheath;

[0020] The nine sub-cables are arranged in a nine-square grid. From top to bottom, among the three upper sub-cables, the right plug-in component of the left sub-cable is plugged into the left plug-in slot of the middle sub-cable, and the left plug-in component of the right sub-cable is plugged into the right plug-in slot of the middle sub-cable;

[0021] Among the three sub-cables in the middle, the plug-in component on the left side of the sub-cable in the middle is plugged into the plug-in slot on the right side of the sub-cable on the left side, and the plug-in component on the right side of the sub-cable in the middle is plugged into the plug-in slot on the left side of the sub-cable on the right side;

[0022] Among the three sub-cables at the bottom, the right plug-in component of the left sub-cable is plugged into the left plug-in slot of the middle sub-cable, and the left plug-in component of the right sub-cable is plugged into the right plug-in slot of the middle sub-cable;

[0023] From left to right, among the three sub-cables on the left, the two plug-in components of the middle sub-cable are respectively plugged into the corresponding plug-in slots of the two sub-cables on the upper and lower sides;

[0024] Among the three sub-cables in the middle, two plug-in slots of the middle sub-cable are respectively plugged with corresponding plug-in components of the two sub-cables on the upper and lower sides;

[0025] Among the three sub-cables on the right, the two plug-in components of the middle sub-cable are respectively plugged into corresponding plug-in grooves of the two sub-cables on the upper and lower sides, forming four third cavities in the cable core.

[0026] In the cable described above, a filling component is provided in the gap between the cable core and the second sheath.

[0027] In the above-mentioned cable, the material of the second sheath is nylon.

[0028] In the cable described above, the material of the filling component is polypropylene.

[0029] The power sub-cable and cable of the present invention can be widely used in internal stress monitoring of buildings, roads, dams, etc.

[0030] The present invention has the following beneficial effects:

[0031] 1. The reinforcement members are distributed around each electrical unit and the first optical unit, which well protects the electrical unit and the first optical unit.

[0032] 2. The width of the connecting component is smaller than the diameter of the inscribed circle of the strip edge of the reinforcement sheath, so that the power sub-cable will not contact the surrounding walls or pipe walls during wiring, thus avoiding damage to the connecting component.

[0033] 3. The second optical unit, the connecting component outside the second optical unit, the reinforcing member sheaths at both ends of the connecting component, and the reinforcing member inside the reinforcing member sheath form a butterfly unit, which can be used for wiring in a dam monitoring room or other buildings.

[0034] 4. The reinforcement is shared by multiple butterfly units, saving the material of the reinforcement.

[0035] 5. The reinforcements are evenly distributed throughout the power sub-cable, making the power sub-cable more evenly stressed when subjected to dragging or other stress conditions.

[0036] 6. The power sub-cables can be connected to each other to form more cable cores for the transmission line, facilitating the expansion of the cable cores.

[0037] 7. The power sub-cable is connected by plugging, which avoids the use of fixing materials such as yarn and tape, and saves costs.

[0038] 8. A new third cavity is formed in the cable core, which can be used to expand the number of electrical units.

[0039] 9. The first light unit is located in the second cavity in the middle of the third layer, that is, in the middle position, which provides the best protection for the first light unit.

[0040] 10. When laying power sub-cables, multiple power sub-cables can be plugged in for easy laying. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a schematic diagram of the three-dimensional structure of a section of Example 1 of the present invention.

[0042] Figure 2 It is a front view of embodiment 1 of the present invention.

[0043] Figure 3 It is a front view of the first protective layer of Example 1 of the present invention.

[0044] Figure 4 It is a front view of embodiment 2 of the present invention.

[0045] Figure 5 It is a schematic diagram of the three-dimensional structure of a section of Example 3 of the present invention.

[0046] Figure 6 It is a front view of embodiment 3 of the present invention.

[0047] In the figure, 1. first protective layer, 11. reinforcement protective layer, 12. connecting component, 13. first cavity, 14. second cavity, 15. plug-in slot, 2. reinforcement, 3. electrical unit, 4. first optical unit, 5. filling component, 6. third cavity, 7. second protective layer, 8. second optical unit. DETAILED DESCRIPTION

[0048] Example 1: Figures 1 to 3, a power sub-cable, consisting of a first sheath 1, a plurality of strength members 2, a plurality of electrical units 3 and a first optical unit 4, the first sheath 1 consisting of fourteen strength member sheaths 11 and twenty connecting components 12, the strength member sheaths 11 are regular octagonal, from top to bottom, the fourteen strength member sheaths 11 are arranged in five layers, the first layer has two strength member sheaths 11, the second layer has three strength member sheaths 11, the third layer has four strength member sheaths 11, the fourth layer has three strength member sheaths 11, and the fifth layer has two strength member sheaths 11;

[0049] The two reinforcement sheaths 11 of the first layer are located above the corresponding intervals of the three reinforcement sheaths 11 of the second layer, the three reinforcement sheaths 11 of the second layer are located above the corresponding intervals of the four reinforcement sheaths 11 of the third layer, the three reinforcement sheaths 11 of the fourth layer are located below the corresponding intervals of the four reinforcement sheaths 11 of the third layer, and the two reinforcement sheaths 11 of the fifth layer are located below the corresponding intervals of the three reinforcement sheaths 11 of the fourth layer;

[0050] The first layer of the reinforcement sheath 11 is connected to the corresponding two second layers of reinforcement sheaths 11 below by a connecting component 12, the second layer of the reinforcement sheath 11 is connected to the corresponding two third layers of reinforcement sheaths 11 below by a connecting component 12, the fourth layer of the reinforcement sheath 11 is connected to the corresponding two third layers of reinforcement sheaths 11 above by a connecting component 12, the fifth layer of the reinforcement sheath 11 is connected to the corresponding two fourth layers of reinforcement sheaths 11 above by a connecting component 12, a second cavity 14 is formed between the four adjacent reinforcement sheaths 11, a first cavity 13 is provided in the reinforcement sheath 11, at least one first optical unit 4 is provided in the middle second cavity 14 of the third layer, the remaining second cavities 14 are provided with electrical units 3, and the first cavity 13 is provided with a reinforcement 2;

[0051] An insertion groove 15 is formed between the two reinforcement sheaths 11 of the first layer, an insertion groove 15 is formed between the two reinforcement sheaths 11 of the fifth layer, and the reinforcement sheaths 11 on the leftmost and rightmost sides of the third layer are insertion components.

[0052] Example 2: Figure 4 , and refer to Figures 1 to 3 , a cable, comprising nine power sub-cables as described in embodiment 1 and a second sheath 7, wherein the nine power sub-cables form a cable core, and the cable core is located in the second sheath 7;

[0053] The nine sub-cables are arranged in a nine-square grid. From top to bottom, among the three upper sub-cables, the right plug-in component of the left sub-cable is plugged into the left plug-in slot 15 of the middle sub-cable, and the left plug-in component of the right sub-cable is plugged into the right plug-in slot 15 of the middle sub-cable;

[0054] Among the three sub-cables in the middle, the plug-in component on the left side of the middle sub-cable is plugged into the plug-in slot 15 on the right side of the sub-cable on the left side, and the plug-in component on the right side of the middle sub-cable is plugged into the plug-in slot 15 on the left side of the sub-cable on the right side;

[0055] Among the three sub-cables at the bottom, the right plug-in component of the left sub-cable is plugged into the left plug-in slot 15 of the middle sub-cable, and the left plug-in component of the right sub-cable is plugged into the right plug-in slot 15 of the middle sub-cable;

[0056] From left to right, among the three sub-cables on the left, the two plug-in components of the middle sub-cable are respectively plugged into the corresponding plug-in slots 15 of the two sub-cables on the upper and lower sides;

[0057] Among the three sub-cables in the middle, the two plug-in slots 15 of the middle sub-cable are respectively plugged with corresponding plug-in components of the two sub-cables on the upper and lower sides;

[0058] Among the three sub-cables on the right side, the two plug-in components of the middle sub-cable are respectively plugged into the corresponding plug-in slots 15 of the two sub-cables on the upper and lower sides;

[0059] Four third cavities 6 are formed in the cable core for expanding the capacity of the electrical units in the cable. A filling component 5 is provided in the gap between the cable core and the second sheath 7 .

[0060] Example 3: Figure 5 and Figure 6 , and refer to Figure 3 , a power sub-cable, consisting of a first sheath 1, a plurality of strength members 2, a plurality of electrical units 3 and a first optical unit 4, the first sheath 1 consisting of fourteen strength member sheaths 11 and twenty connecting components 12, the strength member sheaths 11 are regular octagonal, from top to bottom, the fourteen strength member sheaths 11 are arranged in five layers, the first layer has two strength member sheaths 11, the second layer has three strength member sheaths 11, the third layer has four strength member sheaths 11, the fourth layer has three strength member sheaths 11, and the fifth layer has two strength member sheaths 11;

[0061] The two reinforcement sheaths 11 of the first layer are located above the corresponding intervals of the three reinforcement sheaths 11 of the second layer, the three reinforcement sheaths 11 of the second layer are located above the corresponding intervals of the four reinforcement sheaths 11 of the third layer, the three reinforcement sheaths 11 of the fourth layer are located below the corresponding intervals of the four reinforcement sheaths 11 of the third layer, and the two reinforcement sheaths 11 of the fifth layer are located below the corresponding intervals of the three reinforcement sheaths 11 of the fourth layer;

[0062] The first layer of the reinforcement sheath 11 is connected to the corresponding two second layers of reinforcement sheaths 11 below by a connecting component 12, the second layer of the reinforcement sheath 11 is connected to the corresponding two third layers of reinforcement sheaths 11 below by a connecting component 12, the fourth layer of the reinforcement sheath 11 is connected to the corresponding two third layers of reinforcement sheaths 11 above by a connecting component 12, the fifth layer of the reinforcement sheath 11 is connected to the corresponding two fourth layers of reinforcement sheaths 11 above by a connecting component 12, a second cavity 14 is formed between the four adjacent reinforcement sheaths 11, a first cavity 13 is provided in the reinforcement sheath 11, at least one first optical unit 4 is provided in the middle second cavity 14 of the third layer, the remaining second cavities 14 are provided with electrical units 3, and the first cavity 13 is provided with a reinforcement 2;

[0063] A plug-in slot 15 is formed between the two reinforcement sheaths 11 of the first layer, a plug-in slot 15 is formed between the two reinforcement sheaths 11 of the fifth layer, and the reinforcement sheaths 11 on the leftmost and rightmost sides of the third layer are plug-in components;

[0064] A second optical unit 8 is provided in the connecting component 12, and the second optical unit 8 is an optical fiber. The second optical unit 8, the connecting component 12 outside the second optical unit 8, the reinforcement sheath 11 at both ends of the connecting component 12, and the reinforcement 2 in the reinforcement sheath 11 form a butterfly unit, which can be used for wiring in a dam monitoring room or other buildings.

[0065] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the material of the first sheath 1 is a flame retardant material.

[0066] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the electrical unit 3 is composed of a conductor and an insulating layer extruded outside the conductor.

[0067] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the first optical unit 4 is a tight-buffered optical fiber, which is composed of an optical fiber and a tight-buffered layer extruded outside the optical fiber.

[0068] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the reinforcement member 2 is a phosphating steel wire.

[0069] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the width of the connecting component 12 is smaller than the diameter of the inscribed circle of the eight sides of the reinforcement member sheath 11 .

[0070] In the power sub-cable described in the above-mentioned embodiment 1 or embodiment 3, the second cavity 14 is in a regular octagon.

[0071] In the cable described in the above-mentioned embodiment 2, the material of the second sheath 7 is nylon.

[0072] In the cable described in the above embodiment 2, the material of the filling component 5 is polypropylene.

[0073] The first optical unit 4 and the second optical unit 8 in the present invention are used to transmit data monitored by the stress sensors installed on the dam.

[0074] The cable and power sub-cable of the present invention contain optical fibers and can be used as optical fiber and optical cable sensors.

[0075] The present invention has the following beneficial effects:

[0076] 1. The reinforcement members 2 are distributed around each electrical unit 3 and the first optical unit 4, thus protecting the electrical unit 3 and the first optical unit 4 well.

[0077] 2. The width of the connecting component 12 is smaller than the diameter of the inscribed circle of the eight sides of the reinforcing member sheath 11 , so that the power sub-cable will not contact the surrounding walls or pipe walls during wiring, thus avoiding damage to the connecting component 12 .

[0078] 3. The second optical unit 8, the connecting component 12 outside the second optical unit 8, the reinforcing member sheaths 11 at both ends of the connecting component 12, and the reinforcing member 2 in the reinforcing member sheath 11 form a butterfly unit, which can be used for wiring in a dam monitoring room or other buildings.

[0079] 4. The reinforcement member 2 is shared by a plurality of butterfly-shaped units, thus saving the material of the reinforcement member.

[0080] 5. The reinforcement members 2 are evenly distributed throughout the power sub-cable, so that the power sub-cable is subjected to more uniform stress under stress conditions such as dragging.

[0081] 6. The power sub-cables can be connected to each other to form more cable cores for the transmission line, facilitating the expansion of the cable cores.

[0082] 7. The power sub-cable is connected by plugging, which avoids the use of fixing materials such as yarn and tape, and saves costs.

[0083] 8. A new third cavity 6 is formed in the cable core, which can be used to expand the number of electrical units.

[0084] 9. The first light unit 4 is located in the second cavity 14 in the middle of the third layer, that is, in the middle position, which provides the best protection for the first light unit 4.

[0085] 10. When laying power sub-cables, multiple power sub-cables can be plugged in for easy laying.

[0086] The above embodiments are only preferred technical solutions of the present invention and should not be regarded as limiting the present invention. The protection scope of the present invention shall be the technical solutions recorded in the claims, including the equivalent replacement solutions of the technical features in the technical solutions recorded in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present invention.

Claims

1. A power sub-cable, comprising a first sheath (1), a plurality of reinforcement members (2), a plurality of electrical units (3) and a first optical unit (4), characterized in that: The first protective layer (1) is composed of fourteen reinforcement protective layers (11) and twenty connecting parts (12). The reinforcement protective layers (11) are in the shape of a regular octagon. From top to bottom, the fourteen reinforcement protective layers (11) are arranged in five layers. The first layer has two reinforcement protective layers (11), the second layer has three reinforcement protective layers (11), the third layer has four reinforcement protective layers (11), the fourth layer has three reinforcement protective layers (11), and the fifth layer has two reinforcement protective layers (11); the two reinforcement protective layers (11) of the first layer are located above the corresponding intervals of the three reinforcement protective layers (11) of the second layer, the three reinforcement protective layers (11) of the second layer are located above the corresponding intervals of the four reinforcement protective layers (11) of the third layer, the three reinforcement protective layers (11) of the fourth layer are located below the corresponding intervals of the four reinforcement protective layers (11) of the third layer, and the two reinforcement protective layers (11) of the fifth layer are located above the corresponding intervals of the three reinforcement protective layers (11) of the fourth layer. Below; the first layer of the reinforcement member sheath (11) and the corresponding two second layer reinforcement member sheaths (11) adjacent below are connected via a connecting component (12); the second layer of the reinforcement member sheath (11) and the corresponding two third layer reinforcement member sheaths (11) adjacent below are connected via a connecting component (12); the fourth layer of the reinforcement member sheath (11) and the corresponding two third layer reinforcement member sheaths (11) adjacent above are connected via a connecting component (12); the fifth layer of the reinforcement member sheath (11) and the corresponding two fourth layer reinforcement member sheaths (11) adjacent above are connected via a connecting component (12); a second cavity (14) is formed between the four adjacent reinforcement member sheaths (11); a first cavity (13) is provided in the reinforcement member sheath (11); at least one first optical unit (4) is provided in the second cavity (14) in the middle of the third layer; electrical units (3) are provided in the remaining second cavities (14); and a reinforcement member (2) is provided in the first cavity (13).

2. The power sub-cable according to claim 1, characterized in that: A plug-in slot (15) is formed between the two reinforcement sheaths (11) of the first layer, a plug-in slot (15) is formed between the two reinforcement sheaths (11) of the fifth layer, and the reinforcement sheaths (11) on the leftmost and rightmost sides of the third layer are plug-in components.

3. The power sub-cable according to claim 2, characterized in that: A second light unit (8) is arranged in the connecting component (12).

4. The power sub-cable according to claim 3, characterized in that: The material of the first protective layer (1) is a flame retardant material.

5. The power sub-cable according to claim 4, characterized in that: The electrical unit (3) is composed of a conductor and an insulating layer extruded outside the conductor.

6. The power sub-cable according to claim 5, characterized in that: The first optical unit (4) is a tight-jacketed optical fiber, which is composed of an optical fiber and a tight-jacketed layer extruded outside the optical fiber.

7. The power sub-cable according to claim 6, characterized in that: The reinforcement member (2) is a phosphating steel wire.

8. The power sub-cable according to claim 7, characterized in that: The width of the connecting part (12) is smaller than the diameter of the inscribed circle of the eight sides of the reinforcement member sheath (11).

9. The power sub-cable according to claim 8, characterized in that: The second cavity (14) is in the shape of a regular octagon.

10. A cable, characterized in that: The invention comprises nine power sub-cables as claimed in claim 9 and a second sheath (7), wherein the nine power sub-cables form a cable core, and the cable core is located in the second sheath (7); the nine sub-cables are arranged in a nine-square grid, from top to bottom, among the three sub-cables in the upper part, the right side plug-in component of the left sub-cable is plugged into the left side plug-in groove (15) of the middle sub-cable, and the left side plug-in component of the right sub-cable is plugged into the right side plug-in groove (15) of the middle sub-cable; among the three sub-cables in the middle part, the left side plug-in component of the middle sub-cable is plugged into the right side plug-in groove (15) of the left sub-cable, and the right side plug-in component of the middle sub-cable is plugged into the left side plug-in groove (15) of the right sub-cable; among the three sub-cables in the lower part, the left side plug-in component of the The plug-in component on the right side of the sub-cable is plugged into the plug-in groove (15) on the left side of the middle sub-cable, and the plug-in component on the left side of the right sub-cable is plugged into the plug-in groove (15) on the right side of the middle sub-cable; from left to right, among the three sub-cables on the left side, the two plug-in components of the middle sub-cable are respectively plugged into a corresponding plug-in groove (15) of the two sub-cables on the upper and lower sides; among the three sub-cables in the middle, the two plug-in grooves (15) of the middle sub-cable are respectively plugged into a corresponding plug-in component of the two sub-cables on the upper and lower sides; among the three sub-cables on the right side, the two plug-in components of the middle sub-cable are respectively plugged into a corresponding plug-in groove (15) of the two sub-cables on the upper and lower sides, and four third cavities (6) are formed in the cable core.

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