JP2017216170A - Power cable, spacer member for power cable - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a power cable that has excellent productivity and handling property and is difficult to be collapsed by a lateral pressure and a spacer member used therefor.SOLUTION: A spacer member 29 is provided with an opening part 31 along a longitudinal direction. The opening part 31 is opened toward an outer peripheral direction of the power cable 1. The spacer member 29 has a first non-closed space part 35a opened by the opening part 31. The non-closed space part 35a is constituted of a pair of wall parts 39 and a bottom part 41 connecting the pair of wall parts 39. The opening part 31 is formed between the pair of wall parts 39. The opening part 31 is formed between a pair of arm parts 33. The arm part 33 is formed along an internal surface of a covering body 27 in the inside of the cable 1. Each of the arm parts 33 and the wall part 39 (outer surface of the non-closed space part 35a) form a second non-closed space part 35b.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a power cable in which a plurality of power line cores are twisted and a spacer member used for the power cable.

  A power cable is used that includes a power core unit in which three power cores are twisted together and a covering that covers the power core unit from the surroundings. Usually, polypropylene strings are gathered between adjacent power line cores and used as inclusions.

  On the other hand, an inclusion (hereinafter referred to as a spacer member) formed by extrusion or the like, for example, is sometimes used instead of a polypropylene string or the like (for example, Patent Documents 1, 2, and 3). By using such a spacer member, it is possible to reliably fill a gap between adjacent power line cores. Further, for example, even when an optical cable is laid between adjacent power line cores, the optical cable can be more reliably protected.

JP 2007-73519 A JP 2011-216206 A JP 05-166422 A

  The spacer members proposed in Patent Documents 1 to 3 are disposed between adjacent power line cores. Since the power cable is manufactured by twisting the power line core at a predetermined pitch, the spacer member also needs to be arranged while being twisted in the longitudinal direction together with the power line core. In order to supply the spacer member, it is necessary to wind the spacer member around a drum or the like in advance. Therefore, the spacer member needs to be a material that can be easily twisted and bent to such an extent that it can be easily twisted together with the power line core and wound on a drum or the like.

  For example, when the spacer member is difficult to bend, it is necessary to increase the diameter of the drum around which the spacer member is wound, which increases the transportation cost. In addition, when a large drum is used, there is a problem that the amount of winding is reduced due to equipment restrictions, and the productivity is deteriorated due to an increase in drum replacement work or spacer member connection work.

  Further, if the spacer member is difficult to twist, there is a problem that when twisted together with the power line core, the spacer member does not fit between the power line cores, and the shape after twisting becomes worse.

  On the other hand, a side pressure is applied to an electric power cable manufactured by twisting spacer members at the time of laying or after laying. Therefore, the spacer member needs to have a rigidity that can withstand this lateral pressure.

  In addition, the manufacturing cost and material cost of the spacer member having a complicated shape increase. For example, a spacer member having a hollow shape in cross section requires sizing extrusion and the like, and equipment costs and productivity are deteriorated. For this reason, a simple shape that can be manufactured at low cost is desired.

  The present invention has been made in view of such a problem, and an object of the present invention is to provide a power cable that is excellent in manufacturability and handleability and is not easily crushed against a side pressure, and a spacer member used therefor.

  In order to achieve the above-described object, the first invention includes a power line core unit formed by twisting a plurality of power line cores formed by covering a conductor with an insulator, a covering body that covers the power line core unit from the surroundings, A spacer member disposed in a gap formed between the power line core unit and the covering, the spacer member being formed along the longitudinal direction and opening in the outer peripheral direction of the power cable And a first non-sealed space portion that is opened by the opening portion, and a pressing portion that presses the power line core.

  The spacer member includes a pair of arm portions formed along an inner surface of the covering body, and the opening portion is formed between the pair of arm portions, and the arm portion and the first non-contact portion. A second non-sealed space portion may be formed with an outer surface of the sealed space portion, and the pressing portion may be a tip of the arm portion and an outer surface of the first non-sealed space portion.

  You may have a some recessed part on the outer surface side of the said arm part along the longitudinal direction of the said spacer member.

  You may have a waveform on the outer surface side of the said arm part with respect to the width direction of the said spacer member.

  The spacer member may be a porous body.

  The spacer member may include an inorganic material.

  An optical cable may be accommodated in the first non-sealed space.

  An optical cable may be accommodated between the outside of the first non-sealed space and the power line core.

  According to the first invention, since the spacer member opens outward, a sealed space is not formed. Thus, since the spacer member has a structure that does not have a sealed space, the spacer member is manufactured at low cost without using expensive jigs and tools such as a vacuum drawing extrusion device using a sizing die or the like. be able to.

  In addition, an optical cable, an optical unit, or the like can be accommodated in the non-sealed space portion. However, since the non-sealed space portion opens toward the outside of the power cable, the optical cable or the like can be viewed from the outside. it can. For this reason, it can be recognized whether there is any abnormality in the optical cable or the like. In addition, in an offshore cable joint, it is possible to easily draw out only an optical cable or the like without changing the spacer member.

  In addition, when the power cable is bent or twisted, a large deformation occurs in the vicinity of the outer periphery of the power cable. However, since the spacer member opens outward, the opening easily absorbs the deformation. Easy to follow the bending and twisting of power cables.

  Further, by forming the pair of arm portions along the inner surface shape of the covering, it is possible to receive an external force in a wider range with respect to the side pressure of the power cable. Further, as described above, the second non-sealed space portion is formed by the arm portion and the outer surface of the first non-sealed space portion, so that a sealed space may be formed in a part of the spacer member as described above. Absent. Moreover, since the holding | suppressing part is formed by the front-end | tip of an arm part and the outer surface of a 1st non-sealed space part, force can be disperse | distributed to the wide range of a power line core, and a power line core can be pressed down.

  In addition, by forming a plurality of recesses along the longitudinal direction of the spacer member on the outer surface side of the arm portion, the spacer member can be easily twisted even during the production of the power cable. Are easy to twist at the same time. In addition, the flexibility of the power cable can be easily followed.

  Similarly, a similar effect can be obtained by forming a wave shape in the width direction of the spacer member on the outer surface side of the arm portion.

  Moreover, if a spacer member is a porous body, flexibility can be improved. For this reason, deformation becomes easier, and handling becomes easier at the time of manufacturing or the like.

  Moreover, flexibility can be improved by adding inorganic substances, such as a talc, to a spacer member. For this reason, deformation becomes easier, and handling becomes easier at the time of manufacturing or the like.

  In addition, since the optical cable is accommodated in the first non-sealed space portion, as described above, the optical cable can be easily visually recognized and can be easily taken out.

  By accommodating the optical cable between the outside of the first non-sealed space and the power core, even an optical cable having a relatively large diameter can be accommodated.

  A second invention is a spacer member for a power cable, wherein the spacer member is formed with an opening formed along a longitudinal direction, and a pair of arms formed on both sides of the opening and having an arc-shaped outer surface. A second non-sealed space portion formed by a portion, a first non-sealed space portion that opens to the outside by the opening portion, the arm portion, and an outer surface of the first non-sealed space portion. The power cable spacer member is characterized in that a pressing portion for pressing the power line core is formed by the tip of the arm portion and the outer surface of the first non-sealed space portion.

  According to the second invention, it is possible to obtain a spacer member that has good manufacturability, is easily twisted with a power line core when used for a power cable, and has sufficient side pressure resistance against side pressure. it can.

  ADVANTAGE OF THE INVENTION According to this invention, it is excellent in manufacturability and handleability, and can provide the power cable which is hard to be crushed with respect to a side pressure, and the spacer member used for this.

Sectional drawing which shows the power cable 1. FIG. The perspective view of the spacer member 29. FIG. Sectional drawing which shows the power cable 1a. The perspective view of the spacer member 29a. The perspective view of the spacer member 29b. The conceptual diagram which shows the test method of the spacer member 29. FIG. The figure which shows the deformation | transformation of the X direction of the spacer member 29. FIG. The figure which shows the deformation | transformation of the Y direction of the spacer member 29. FIG. The figure which shows the twist deformation | transformation of the spacer member 29. FIG. The figure which shows the side pressure test method of the spacer member 29. FIG.

<Embodiment 1>
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view perpendicular to the longitudinal direction of the power cable 1. The power cable 1 mainly includes a power line core unit 10 and a covering 27 that covers the power line core unit 10 from the periphery.

  The power line core unit 10 is formed by twisting a plurality of power line cores 3 (three in the figure). The power line core 3 includes, in order from the center, a conductor 7, an inner semiconductive layer 9 provided on the outer periphery of the conductor 7, an insulating layer 11 provided on the outer periphery of the inner semiconductive layer 9, and an outer provided on the outer periphery of the insulating layer 11. It consists of a semiconductive layer 13, a metal sheath 15 provided on the outer periphery of the outer semiconductive layer 13, an inner sheath 17 provided on the outer periphery of the metal sheath 15, and the like.

  The covering body 27 includes a presser tape 21, an armor 23, an outer sheath 25, and the like. The configurations of the power line core 3 and the covering body 27 are not limited to the illustrated example, and a part of the illustrated configuration may be omitted, or another configuration may be added. For example, the power line core 3 may be configured by covering at least the conductor 7 with an insulator (including the internal semiconductive layer 9, the insulating layer 11, and the external semiconductive layer 13).

  A spacer member 29 is disposed in the gap formed between the power line core unit 10 and the covering body 27. The spacer member 29 may be disposed at least in one place, but is desirably disposed in each of three places between the three power line cores 3.

  An optical cable 5 is disposed in the gap between the adjacent power line cores 3 and the spacer member 29 as necessary. The power cable 1 in the present invention includes an optical composite power cable including the optical cable 5.

  Next, the spacer member 29 for power cables will be described in detail. FIG. 2 is a perspective view of the spacer member 29. The spacer member 29 is formed with an opening 31 along the longitudinal direction. The opening 31 opens toward the outer periphery of the power cable 1. The spacer member 29 has a first non-sealed space portion 35 a opened by the opening portion 31.

  The non-sealed space portion 35 a includes a pair of wall portions 39 and a bottom portion 41 that connects the pair of wall portions 39. An opening 31 is formed between the pair of wall portions 39. The non-sealed space portion 35 a does not become a closed space but opens through the opening 31 in a cross section at an arbitrary position perpendicular to the longitudinal direction of the spacer member 29.

  A pair of arm portions 33 are provided on both sides of the opening 31. That is, the opening 31 is formed between the pair of arm portions 33. The arm portion 33 is formed along the inner surface of the covering body 27 inside the power cable 1. That is, the outer surfaces of the pair of arm portions 33 are formed in an arc shape with a substantially constant curvature in a cross section perpendicular to the longitudinal direction of the spacer member 29.

  Each arm part 33 and the wall part 39 (outer surface of the non-sealed space part 35a) form a second non-sealed space part 35b. That is, the non-sealed space portion 35 b is formed in a space surrounded by the arm portion 33 and the wall portion 39 (the outer surface of the non-sealed space portion 35 a), and a gap between the tip of the arm portion 33 and the wall portion 39. Thus, the opening 31 opens in the opposite direction.

  In addition, it forms so that the space | interval of the opposing wall part 39 may spread gradually toward the bottom part 41 from the opening part 31. FIG. Therefore, the angle formed by the wall 39 and the bottom 41 is an acute angle. Similarly, the angle formed by the wall 39 and the arm 33 is an acute angle. By doing so, for example, when a force is applied in the direction in which the spacer member 29 is crushed, the opening 31 is deformed so as to close, and buckling of the wall 39 and bending of the arm 33 can be suppressed. .

  On both sides of the opening portion of the non-sealed space portion 35b, pressing portions 37a and 37b for pressing the power line core 3 disposed inside are formed. The pressing portion 37 a is formed on the lower end of the wall portion 39 (the outer surface of the non-sealed space portion 35 a), and the pressing portion 37 b is formed on the lower end surface of the arm portion 33. In this way, since one power line core 3 is pressed at two locations of the holding portions 37a and 37b that are separated from each other, when a side pressure is applied, the force to the power line core 3 is dispersed at a plurality of locations, and some It is possible to prevent the pressing force from concentrating on.

  In addition, when the spacer member 29 is formed in advance larger than the gap between the power line core unit 10 and the covering body 27 and accommodated in the power cable 1, the spacer member 29 may be slightly deformed. By doing so, the spacer member 29 can be reliably brought into contact with the covering 27 and the power line core 3.

  The spacer member 29 is made of resin, for example. The spacer member 29 has the same cross-sectional shape at an arbitrary position in the longitudinal direction. For this reason, the spacer member 29 can be manufactured by extrusion. At this time, since there is no sealed space in the cross section, it can be easily manufactured without using a sizing die or the like.

  The spacer member 29 may be a porous body. By making the spacer member 29 porous, the flexibility of the spacer member 29 can be improved. For this reason, since the deformation of the spacer member 29 becomes easier, the manufacturability of the power cable 1 is improved and the handling becomes easy.

  Further, an inorganic substance such as talc may be added to the resin of the spacer member 29. By adding an inorganic substance to the spacer member 29, the flexibility of the spacer member 29 can be improved. For this reason, since the deformation of the spacer member 29 becomes easier, the manufacturability of the power cable 1 is improved and the handling becomes easy.

  Here, in the power cable 1 shown in FIG. 1, the optical cable 5 is accommodated in a gap between the bottom 41 (outside the non-sealed space 35 a) of the spacer member 29 and the power line core 3. By doing so, even the optical cable 5 having a relatively large diameter can be accommodated in the gap. Further, since the optical cable 5 is disposed near the center of the power cable 1, the optical cable 5 is not easily affected by bending of the power cable 1 or the like.

  On the other hand, you may accommodate the optical cable 5 in the inside of the non-sealed space part 35a like the power cable 1a shown in FIG. By doing in this way, while being able to visually recognize the optical cable 5 easily by the opening part 31, taking out of the optical cable 5 etc. are also easy.

  Here, when the power cable 1a is deformed, the spacer member 29 is also deformed together with the power cable 1a. At this time, as described above, since the opening 31 is deformed in the closing direction, the internal optical cable 5 does not jump out of the opening 31. In the following description, the power cable 1 will be described, but the same applies to the power cable 1a.

  Next, the function of the spacer member 29 will be described. The spacer member 29 has flexibility and is easy to bend and twist. For this reason, when manufacturing the power cable 1, it can be easily twisted together with the power line core 3. The manufactured power cable 1 has flexibility, but the spacer member 29 can easily follow the flexibility of the power cable 1.

  In addition, the spacer member 29 fills the gap between the power line core unit 10 and the cover 27 and maintains the outer shape of the power cable 1. At this time, the spacer member 29 receives an external force and is not easily crushed against a lateral pressure applied to the power cable 1. For this reason, the deformation | transformation etc. of the power cable 1 can be suppressed.

  As described above, according to the present embodiment, it is possible to obtain the spacer member 29 excellent in manufacturability and easy to handle and the power cable 1 using the spacer member 29. In particular, since the spacer member 29 has an opening 31 in the cross section and does not have a sealed space, expensive jigs and tools such as a vacuum drawing extrusion device using a sizing die or the like are used at the time of manufacturing the spacer member 29. Without using it, it can be manufactured at low cost.

  The non-sealed space 35a can accommodate the optical cable 5, the optical unit, and the like. In this case, since the non-sealed space portion 35a is opened outward, the optical cable 5 and the like can be viewed from the outside. For this reason, it is easy to check the optical cable 5, and it is possible to easily pull out only the optical cable 5 without changing the spacer member 29.

  Further, when the power cable 1 is bent or twisted, a large deformation occurs in the vicinity of the outer peripheral portion of the power cable 1. However, since the opening 31 is formed toward the outside of the power cable 1, the opening 31 can easily absorb the deformation of the spacer member 29 and can easily follow the bending and twisting of the power cable 1. .

  Further, since the arm portion 33 curved in an arc shape is provided so as to follow the inner surface shape of the covering body 27, it can be brought into contact with the covering body 27 of the power cable 1 in a wide range. That is, the lateral pressure of the power cable 1 can be received by the entire arm portion 33. For this reason, the side pressure can be received by the entire spacer member 29, and local crushing or the like hardly occurs.

  Further, the distal end portion of the arm portion 33 serves as a pressing portion 37 b in which the outer side is in contact with the covering body 27 and the inner side is in contact with the power line core 3. For this reason, bending, crushing, etc. of the tip of the arm portion 33 are suppressed. Furthermore, since the space between the arm portions 33 is the opening 31, the spacer member 29 can be easily deformed by the distance between the openings 31. For this reason, it is possible to easily follow the deformation of the power cable 1.

  Further, the lower end of the wall portion 39 connected to the arm portion 33 serves as a pressing portion 37 a that contacts the power line core 3. For this reason, the spacer member 29 is disposed so as to straddle the pair of power line cores 3 and can be pressed against the respective power line cores 3 by a plurality of pressing portions 37a and 37b. For this reason, it can suppress that a local stress is provided with respect to the narrow range of the power line core 3. FIG.

<Embodiment 2>
Next, a second embodiment will be described. FIG. 4 is a perspective view showing the spacer member 29a. In the following description, the same components as those described in FIGS. 1 to 3 are denoted by the same reference numerals, and redundant description is omitted.

  The spacer member 29 a has substantially the same configuration as the spacer member 29, but differs in that a recess 43 is formed on the outer surface of the arm portion 33. On the outer surface side of the arm portion 33 of the spacer member 29a, a plurality of concave portions 43 are provided along the longitudinal direction of the spacer member 29a. The recesses 43 are formed at predetermined intervals in the width direction. In addition, although the cross-sectional shape of the recessed part 43 is not specifically limited, For example, a rectangular cross section may be sufficient.

  The arm portion 33 of the spacer member 29 a is formed in an arc shape similar to the spacer member 29 at a portion other than the recess 43. For this reason, the substantially entire surface of the arm portion 33 is in contact with the covering 27.

  According to the second embodiment, an effect similar to that of the first embodiment can be obtained. Further, by forming the recess 43 on the outer surface of the arm portion 33, the flexibility of the arm portion 33 can be increased. For this reason, even when the power cable 1 is manufactured, the spacer member 29a is easily twisted, and the spacer member 29a and the power line core 3 are easily twisted simultaneously. Further, the flexibility of the power cable 1 can be easily followed.

<Embodiment 3>
Next, a third embodiment will be described. FIG. 5 is a perspective view showing the spacer member 29b. The spacer member 29b has substantially the same configuration as the spacer member 29, but differs in that the outer surface of the arm portion 33 has a corrugated portion 45 in the width direction of the spacer member 29b. That is, the surface of the arm portion 33 of the spacer member 29b has an uneven shape.

  Even in this case, the arm portion 33 of the spacer member 29 b is formed in an arc shape similar to the spacer member 29 when the top portion of the corrugated portion 45 is connected, for example. That is, the arm portion 33 of the spacer member 29b is formed with a wave-shaped portion 45 with reference to an arcuate curve.

  According to the third embodiment, the same effect as that of the first embodiment can be obtained. Further, by forming the corrugated portion 45 on the outer surface of the arm portion 33, the flexibility of the arm portion 33 can be enhanced.

  Next, the spacer member according to the present invention was analyzed for ease of deformation and resistance to crushing against side pressure. FIG. 6 is a conceptual diagram showing a test method for the spacer member 29. In the following drawings, an example of the spacer member 29 is shown, but the spacer members 29a and 29b were also tested by the same method.

  As the spacer member 29, high density polyethylene was assumed, and the Poisson's ratio was 0.3 and the Young's modulus was 1.397 GPa. The length (length in the Z direction in the figure) was 300 mm, and one end was fixed by a fixing portion 47.

  In this state, a force of 1 kN was applied to the tip of the arm part from the side in the width direction (X direction in the figure) (arrow A in the figure) to analyze the deformation. FIG. 7 is a conceptual diagram showing the deformation at this time. A dotted line C in the figure indicates a state before the deformation, and a solid line D indicates a state after the deformation. For the external force in the X direction, the maximum displacement in the X direction before and after deformation was determined. The results are shown in Table 1.

  In Table 1, no. 1 is a spacer member 29 shown in FIG. 2 is the spacer member 29a shown in FIG. Reference numeral 3 denotes a spacer member 29b shown in FIG. From Table 1, No. which does not have a recess or a wave shape. In contrast to 1, the amount of deformation increased by forming a recess, and the amount of deformation further increased by forming a wave shape. Thus, the flexibility in the X direction can be further improved by forming the recess and the wave shape.

  Similarly, a force of 1 kN was applied to the center portion of the bottom 41 of the non-sealed space 35a from above in the Y direction in the figure (arrow B in the figure) to analyze the deformation. 8 (a) and 8 (b) are conceptual diagrams showing the deformation at this time, FIG. 8 (a) is a side view, and FIG. 8 (b) is a front view. A dotted line C in the figure indicates a state before deformation, and a solid line E indicates a state after deformation. For the external force in the Y direction, the maximum displacement in the Y direction before and after deformation was determined. The results are shown in Table 2.

  In Table 2, no. 1-3 are the same as Table 1. From Table 2, No. which does not have a recess or a wave shape. In contrast to 1, the amount of deformation increased by forming a recess, and the amount of deformation further increased by forming a wave shape. As described above, by forming the concave portion or the wave shape, the flexibility in the Y direction can be further improved.

In addition, deformation was analyzed by applying a force in the twisting direction to the tip of each arm. FIG. 9 is a conceptual diagram showing the deformation at this time. For the torsional deformation in the F direction, the maximum displacement in the X direction before and after the deformation was determined. The twisting moment was 1 × 10 ⁶ Nmm and the transverse elastic modulus was 537.31 MPa. The results are shown in Table 3.

  In Table 3, no. 1-3 are the same as Table 1. From Table 3, No. which does not have a recess or a wave shape. In contrast to 1, the amount of deformation increased by forming a recess, and the amount of deformation further increased by forming a wave shape. Thus, the flexibility in the twisting direction can be further improved by forming the recess and the wave shape.

  Furthermore, the crushing amount with respect to the side pressure of the spacer member 29 was analyzed. FIG. 10 is a diagram illustrating a lateral pressure test method for the spacer member 29. The spacer member 29 was disposed above a portion that was regarded as a power line core, and a lateral pressure of 600 kg / m (weight relative to the cable side surface 1 m) was applied from the outside (arrow G in the figure). At this time, the maximum stress generated in the spacer member 29 and the maximum displacement in the Y direction were obtained. The results are shown in Table 4.

  In Table 4, no. 1-3 are the same as Table 1. From Table 4, No. which does not have a recess or a wave shape. In contrast to 1, the amount of deformation and the maximum stress slightly increased by forming a recess, and further increased by forming a wave shape. However, the difference was slight, and there was no significant difference in the amount of crushing due to the concave shape or wave shape.

  As mentioned above, although embodiment of this invention was described referring an accompanying drawing, the technical scope of this invention is not influenced by embodiment mentioned above. It is obvious for those skilled in the art that various modifications or modifications can be conceived within the scope of the technical idea described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

DESCRIPTION OF SYMBOLS 1, 1a ......... Power cable 3 ......... Power cable core 5 ......... Optical cable 7 ......... Conductor 9 ......... Internal semiconductive layer 10 ......... Power cable core unit 11 ......... Insulating layer 13 ......... External Semiconductive layer 15 ......... Metal sheath 17 .... Inner sheath 21 ......... Pressure tape 23 ......... Armor 25 ......... Outer sheath 27 ......... Coating bodies 29, 29a, 29b ......... Spacer member 31 ......... Opening part 33 ......... Arm part 35a, 35b ......... Non-sealed space part 37a, 37b ......... Presser part 39 ......... Wall part 41 ......... Bottom part 43 ......... Recess 45 ......... Wave Shape part 47 ......... Fixed part

Claims (9)

A power line core unit formed by twisting a plurality of power line cores formed by covering a conductor with an insulator; and
A covering covering the power line core unit from the surroundings;
A spacer member disposed in a gap formed between the power line core unit and the covering;
Comprising
The spacer member is formed along the longitudinal direction and has an opening that opens in the outer peripheral direction of the power cable, a first non-sealed space that opens by the opening, and a pressing portion that presses the power line core. A power cable characterized by that. The spacer member includes a pair of arm portions formed along the inner surface of the covering,
The opening is formed between a pair of the arm portions,
A second non-sealed space portion is formed by the arm portion and the outer surface of the first non-sealed space portion,
The power cable according to claim 1, wherein the pressing portion is a front end of the arm portion and an outer surface of the first non-sealed space portion.   The power cable according to claim 2, further comprising a plurality of recesses along an outer surface side of the arm portion along a longitudinal direction of the spacer member.   The power cable according to claim 2, wherein a wave shape is provided on an outer surface side of the arm portion with respect to a width direction of the spacer member.   The power cable according to any one of claims 1 to 4, wherein the spacer member is a porous body.   The power cable according to any one of claims 1 to 5, wherein the spacer member includes an inorganic substance.   The power cable according to any one of claims 1 to 6, wherein an optical cable is accommodated in the first non-sealed space portion.   The power cable according to any one of claims 1 to 6, wherein an optical cable is accommodated between the outside of the first non-sealed space and the power line core. A spacer member for a power cable,
The spacer member is
An opening formed along the longitudinal direction;
A pair of arms formed on both sides of the opening, the outer surface of which has an arc shape;
A first non-sealed space that opens to the outside by the opening;
A second non-sealed space portion formed by the arm portion and an outer surface of the first non-sealed space portion;
Comprising
A power cable spacer member, wherein a pressing portion for pressing a power line core is formed by a tip of the arm portion and an outer surface of the first non-sealed space portion.

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