Transport structure of hollow insulator unit and transport method of hollow insulator unit

Abstract

To provide a transport apparatus capable of safely transporting an insulator unit with an insulative medium sealed in an insulator body, and capable of making an installation operation at a construction site easy and a method for transporting the insulator unit.SOLUTION: A transport apparatus is a transport apparatus for transporting an insulation tube unit having an insulating medium sealed within an insulation tube body, and includes a stand capable of fixing the insulation tube unit in a horizontal state, and a liquid tank connected to the insulation tube body and capable of flowing an insulation medium in and out between the insulation tube body. The stand has a stand base, a front end fixing part that fixes a front end of the insulating tube unit, and a rear end fixing part that fixes a rear end of the insulating tube unit. The liquid tank is disposed on the stand such that a vertical height of the bottom surface of a liquid storage space in the liquid tank is higher than the vertical height of the top surface of the liquid storage space in the insulation tube body when the fixed insulation tube unit is in a horizontal state.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a transport device for transporting an insulator unit and a transport method for an insulator unit. [Background technology]

[0002] Conventionally, an air termination that provides air insulation using an insulating tube has been known as a cable termination provided at the end of a power cable (see, for example, Patent Document 1). In the prefabricated air termination disclosed in Patent Document 1 and other documents, an insulating medium such as insulating oil (for example, silicone oil) is generally enclosed in the insulating tube.

[0003] Since it is difficult to transport large terminal connections vertically, they are usually transported lying on their side in a horizontal state (see, for example, Patent Document 2). In the case of terminal connections in which an insulating medium is filled inside an insulating tube, the terminal connection is transported horizontally to the construction site, where the insulating medium is filled (hereinafter referred to as "oil filling"). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2000-261948 A [Patent Document 2] Japanese Patent Application Publication No. 10-275531 [Patent Document 3] Patent No. 5606252 [Non-patent literature]

[0005] [Non-Patent Document 1] Showa Electric Wire Review, "Development and Practical Application of 66 / 77kV Direct Molded Through Bushings", Vol. 56, No. 1 (2006) pp. 15-19 Summary of the Invention [Problem to be solved by the invention]

[0006] However, filling the insulating medium with oil at the construction site takes time, and a clean room must be set up to prevent the risk of foreign matter getting into the insulating pipe, lengthening the construction period. In addition, when the insulating medium is a designated flammable material, it is difficult to transport a large amount of the insulating medium in drums to the construction site due to the designated quantity. In addition, equipment such as a gear pump is required at the construction site to fill the insulating medium with oil.

[0007] On the other hand, in order to facilitate the installation work at the construction site, it is also possible to fill the terminal connection part with oil at the factory before transporting it. However, in order to prevent the insulation pipe from being damaged due to the thermal expansion of the insulating medium, the insulation pipe cannot be filled to the brim with the insulating medium. Therefore, during transportation, the liquid surface of the insulating medium vibrates in the insulation pipe, which reduces stability due to a hammering effect, and there is also a risk of the insulating medium leaking out.

[0008] The object of the present disclosure is to enable safe transportation of an insulator unit to a destination such as a construction site while an insulating medium is sealed in the insulator body, and to facilitate installation work at the construction site. Transport structure of hollow insulator unit and a method for transporting the hollow insulator unit. [Means for solving the problem]

[0009] The present disclosure Transport structure of hollow insulator unit teeth, A hollow insulator unit including at least a hollow insulator body, a lower metal fitting provided integrally with a rear end portion of the hollow insulator body, and a fixing metal fitting fastened to the lower metal fitting and disposed on the rear end side of the hollow insulator body, An insulating medium is enclosed in the hollow insulator body. In status For transport Insulator unit transportation structure And, a stand capable of fixing the hollow insulator unit in a horizontal state; a liquid tank capable of allowing the insulating medium to flow in and out between the liquid tank and the insulating pipe body; a first liquid hose that connects a first flow path provided in the fixing metal fitting and the liquid tank and allows the insulating medium to flow in and out between the liquid tank and an inside of the hollow insulator body; Equipped with The frame is A stand base and a tip-side fixing portion that is attached perpendicularly to the frame base and fixes a tip portion of the hollow insulator unit; a rear end fixing portion that is attached perpendicularly to the frame base and fixes a rear end portion of the hollow insulator unit, The liquid tank includes: On the rear end side of the rear end fixing portion, The liquid tank is placed on the stand so that the vertical height of the bottom surface of the liquid storage space in the liquid tank is higher than the vertical height of the top surface of the liquid storage space in the hollow insulator body when the hollow insulator unit to be fixed is in a horizontal position.

[0010] A method for transporting hollow insulator units according to the present disclosure includes the steps of: The above Transport structure of hollow insulator unit a step of fixing the hollow insulator unit to the frame; connecting the hollow insulator body and the liquid tank; The above Mounting stand and transporting the hollow insulator unit to a destination in a state where the hollow insulator unit is fixed to the hollow insulator unit. Effect of the Invention

[0011] According to the present disclosure, the hollow insulator unit can be safely transported to a destination such as a construction site with an insulating medium sealed in the hollow insulator body, and installation work at the construction site can be facilitated. [Brief description of the drawings]

[0012] [Figure 1] FIG. 1 is a cross-sectional view showing a cable termination portion which is an example of an insulator unit. [Diagram 2] FIG. 2 is a side view showing a transportation device according to an embodiment. [Diagram 3] FIG. 3 is a perspective view showing a platform of the transportation device according to the embodiment. [Figure 4A] 4A is a diagram showing a process of fixing a cable end connection to a transport device. [Figure 4B] FIG. 4B illustrates a process for fixing a cable termination to a transportation device. [Figure 4C] FIG. 4C illustrates a process for fixing a cable termination to a transportation device. [Figure 4D]FIG. 4D illustrates a process for securing a cable termination to a transportation device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] 1 is a cross-sectional view showing an example of a hollow insulator unit, a cable termination unit 500. The cable termination unit 500 is an hollow insulator unit provided at the end of a cable terminal (not shown), and is transported to a destination such as a construction site by a transport device 1, which will be described later.

[0015] 1, the cable termination connection part 500 includes an insulator 510, a fixing metal fitting 541, a terminal mounting metal fitting 542, and a conductor pull-out rod 544. In the following description, the side from which the conductor pull-out rod 544 is pulled out is referred to as the "front end side," and the side to which a cable terminal part (not shown) is attached is referred to as the "rear end side."

[0016] The hollow insulator 510 has a hollow insulator body 511 having a cap portion 511a formed on the outer circumferential surface, an upper metal fitting 512 that seals the tip side of the hollow insulator body 511, an insulating unit 520, an electric field mitigation portion 530, and an insulating medium 543. The hollow insulator body 511 may be, for example, a porcelain hollow insulator, or a polymer hollow insulator (also called a composite hollow insulator) in which a polymer coating made of a polymer insulating material such as silicone rubber is integrally formed on the outside of a cylindrical body made of fiber reinforced plastics (FRP).

[0017] The insulating unit 520 has an inner conductor 521 extending in the axial direction, an insulating tube 522 arranged on the outer circumferential surface of the inner conductor 521, and a shielding portion 523 formed on the outer circumferential surface of the insulating tube 522, and functions as a reinforcing insulating portion of the termination connection portion 500. The inner conductor 521 and the insulating tube 522 are integrally formed by molding.

[0018] The internal conductor 521 is formed of a conductive material suitable for electrical conduction, such as copper, aluminum, a copper alloy, or an aluminum alloy. The inner peripheral surface on the rear end side of the internal conductor 521 is exposed from the insulating tube 522, and is provided with a conductor insertion portion 521a for electrically connecting a cable conductor (not shown). The end on the front end side of the internal conductor 521 passes through the insulating tube 522 and is connected to the conductor lead rod 544.

[0019] The insulating tube 522 is formed of a hard plastic resin material (e.g., epoxy resin or FRP) with high mechanical strength. A cone-shaped terminal insertion portion 522a for receiving a cable terminal portion (not shown) is provided on the rear end side of the insulating tube 522. The terminal insertion portion 522a communicates with the conductor insertion portion 521a of the inner conductor 521. The conductor insertion portion 521a and the terminal insertion portion 522a form a cable receiving portion 524 to which the cable terminal portion is attached.

[0020] The shielding portion 523 is formed, for example, by applying a conductive paint to the outer circumferential surface of the insulating tube 522. By providing the shielding portion 523, the electric field is not concentrated between the internal conductor 521 and the shielding portion 523, and the electric field inside the insulating tube 522 is made uniform, thereby stabilizing the electrical characteristics.

[0021] The electric field mitigation section 530 is formed of a cylindrical elastic body having an insulating section 531 on the tip side and a conductive section 532 on the rear end side. The insulating section 531 is concentrically connected to the conductive section 532 at the rear end side, and is formed in a cylindrical shape from an insulating rubber material such as ethylene propylene rubber (EP rubber). The conductive section 532 is formed in a cylindrical shape from a semiconductive rubber material such as semiconductive EP rubber. The insulating section 531 and the conductive section 532 are integrally formed by molding. The electric field mitigation section 530 is arranged so that the outer peripheral surface of the small diameter part on the tip side of the insulating unit 520 overlaps with the inner peripheral surface of the conductive section 532 and the shielding section 523 so that the inner peripheral surface of the conductive section 532 and the shielding section 523 are conductive, and the tip of the shielding section 523 does not protrude from the inner peripheral surface of the conductive section 532.

[0022] Fixing metal fitting 541 is a flange-shaped member having an opening for passing insulating unit 520 through. Fixing metal fitting 541 is disposed on the rear end side of insulator tube main body 511, and is fastened, for example, by bolting, to lower metal fitting 513 that is integrally provided on the rear end of insulator tube main body 511. In addition, support insulator 545 is disposed on the rear end side of fixing metal fitting 541, and is fastened, for example, by bolting.

[0023] The terminal mounting bracket 542 is a cylindrical member with a bottom that is arranged on the outer circumferential surface of the rear end portion of the insulation unit 520. An opening 542b for inserting a cable terminal portion (not shown) is provided in a bottom portion 542a of the terminal mounting bracket 542. The terminal mounting bracket 542 is arranged on the rear end side of the fixing bracket 541, and is fastened to the fixing bracket 541 and the insulation unit 520 by, for example, bolting.

[0024] The inner diameters of fixing metal fitting 541 and terminal mounting metal fitting 542 are approximately the same as the outer diameter of the rear end of insulating unit 520. A seal member (not shown) such as an O-ring is disposed between fixing metal fitting 541 and insulating unit 520. By interposing a seal member between fixing metal fitting 541 and insulating unit 520, the inside of hollow insulator body 511 can be kept airtight or liquidtight to prevent leakage of insulating medium 543 and to relieve bending stress generated in hollow insulator body 511. It is preferable that a plurality of seal members are provided at predetermined intervals in the axial direction.

[0025] The insulating medium 543 is filled in the space between the insulator body 511 and the insulating unit 520, and functions as a main insulating part of the cable termination connection part 500. The insulating medium 543 is formed of insulating oil such as silicone oil, for example.

[0026] Insulating medium 543 is injected into hollow insulator 510 (inside hollow insulator body 511) through a flow path (not shown) provided in fixing bracket 541, for example. A liquid hose 547 that allows insulating medium 543 to flow in and out is connected to the flow path provided in fixing bracket 541 (see FIG. 2). Liquid hose 547 is preferably a high-pressure hose such as a flexible hose that is flexible. One end of liquid hose 547 is provided with one-touch coupler 546 so that a hose for oil filling and oil draining (for example, liquid hose 22 of liquid tank 20) ​​can be easily attached and detached.

[0027] The rear end of the conductor lead-out rod 544 is connected to the inner conductor 521 of the insulating unit 520, and the front end of the conductor lead-out rod 544 penetrates the upper metal fitting 512 of the hollow insulator 510 and is led out to the outside. The conductor lead-out rod 544 is connected to the inner conductor 521 of the insulating unit 520 via, for example, an appropriate conductor connecting member. Furthermore, the portion of the conductor lead-out rod 544 disposed inside the hollow insulator body 511 may be a flexible conductor such as a cable.

[0028] Fig. 2 is a side view showing a transportation device 1 according to an embodiment. Fig. 3 is a perspective view showing a stand 10 of the transportation device 1. Fig. 2 shows a state in which a cable termination connection part 500, which is an example of an insulator unit, is fixed to the transportation device 1. When fixed to the transportation device 1, a cable terminal part is not connected to the cable termination connection part 500, and a cover is attached to the rear end part of the insulation unit 520 to prevent dust and the like from entering inside.

[0029] The transportation device 1 employs several characteristic configurations so that a cable termination connection part 500 (an example of an insulator unit) having an insulating medium 543 sealed inside an insulator body 511 can be safely transported in a horizontal, laid-down position to a destination (e.g., a construction site).

[0030] As shown in FIG. 2, the transportation device 1 includes a platform 10, a liquid tank 20, an intermediate fixing portion 30, and the like.

[0031] As shown in FIG. 3, the mount 10 has a mount base 11, a front end fixing portion 12, a rear end fixing portion 13, a tank holding portion 14, etc., and is capable of fixing a cable termination connection portion 500 in a horizontal state.

[0032] The frame base 11 has a rectangular shape when viewed vertically, is installed horizontally, and supports the front end fixed part 12, the rear end fixed part 13, and the tank holding part 14. The frame base 11 has a recess 111 capable of storing the insulating medium 543 leaked from the hollow insulator body 511 of the cable termination connection part 500, and functions as a so-called oil pan.

[0033] The gantry base 11 may be composed of one member or multiple members. In this embodiment, the gantry base 11 is composed of a connected body in which three base members 11A to 11C are connected. In this case, the length of the gantry base 11 can be easily adjusted according to the length of the cable termination connection part 500 (the length of the hollow insulator 510). In addition, by disassembling the gantry base 11, the storage space of the gantry 10 can be reduced. Note that the number of base members constituting the gantry base 11 is not limited to three and can be changed as appropriate.

[0034] When the gantry base 11 is configured as a connected body made up of a plurality of base members, it is preferable that the height of the partition wall 112 formed at the connected portion is lower than the side wall 113 of the gantry base 11 extending in the longitudinal direction. In this case, the leaked insulating medium 543 is first stored in the recess 111 of the base member (any of 11A to 11C) at the portion corresponding to the leakage location, and even if it is stored above the height of the partition wall 112, it can easily move between the recesses 111 of the adjacent base members, thereby increasing the storage capacity. In addition, the partition wall 112 functions as a reinforcing material for the gantry base 11.

[0035] The tip side fixing part 12 is attached perpendicularly to the frame base 11 and fixes the tip of the cable termination connection part 500, specifically, the upper metal fitting 512 of the hollow insulator 510. The tip side fixing part 12 has a tip side fixing frame 121 that fixes the upper metal fitting 512, and a tip side support body 122 that is erected on the frame base 11 and supports the tip side fixing frame 121.

[0036] The tip fixing frame 121 has a lower fixing frame 121A and an upper fixing frame 121B. The lower fixing frame 121A and the upper fixing frame 121B each have, for example, a substantially U-shape, and when the lower fixing frame 121A and the upper fixing frame 121B are joined together, they form a substantially rectangular shape. The lower fixing frame 121A and the upper fixing frame 121B are fixed to the tip side support 122, for example, by bolt fastening. With the tip of the cable termination connection part 500 placed on the lower fixing frame 121A, the upper fixing frame 121B is placed over and clamped from above, thereby fixing the tip of the cable termination connection part 500 to the tip fixing frame 121.

[0037] Furthermore, lower fixing frame 121A and upper fixing frame 121B each have a substantially V-shaped pressing portion 123 at the bottom of the substantially U-shape. The tip of cable termination connection part 500 (specifically, the outer periphery of disk-shaped upper metal fitting 512 in this embodiment) comes into contact with pressing portion 123 at multiple points, so that axial misalignment of cable termination connection part 500 can be easily absorbed and cable termination connection part 500 can be held in a stable posture.

[0038] The rear end fixing part 13 is attached perpendicularly to the frame base 11 and fixes a fixing metal fitting 541 arranged at the rear end of the cable termination connection part 500, specifically, in this embodiment, on the rear end side of the hollow insulator 510. The rear end fixing part 13 has a rear end fixing frame 131 that fixes the fixing metal fitting 541, and a rear end support body 132 that is erected on the frame base 11 and supports the rear end fixing frame 131.

[0039] The rear end fixing frame 131 is a rectangular frame body, and is firmly fixed to a fixing bracket 541 of the cable connection termination part 500, for example, by bolting. The rear end fixing frame 131 has a rotation axis that is perpendicular to the axial direction of the cable connection termination part 500 (the axial direction of the hollow insulator 510) in a horizontal plane. The rear end fixing frame 131 is attached to the rear end support body 132 via bearings 133 that serve as bearings for the rotation axis, and is rotatable around the rotation axis.

[0040] The tank holding unit 14 holds the liquid tank 20 on the upper part of a support attached vertically to the pedestal base 11. The height of the tank holding unit 14 is set so that the vertical height of the liquid tank 20 is higher than the vertical height of the cable termination connection unit 500 when the cable termination connection unit 500 is fixed to the pedestal 10 in a horizontal state. The "vertical height of the liquid tank 20" refers to the vertical height of the bottom surface of the liquid storage space in the tank main body 21. In addition, the "vertical height of the cable termination connection unit 500" refers to the vertical height of the top surface of the liquid storage space in the hollow insulator main body 511 in a horizontal state.

[0041] Liquid tank 20 has tank body 21 and liquid hose 22. In addition, one-touch coupler 23 is attached to the tip of liquid hose 22. Tank body 21 is fixed to tank holding part 14 of frame 10, and is connected to insulating pipe 510 via liquid hose 22, 547, allowing insulating medium 543 to flow in and out.

[0042] An appropriate amount of insulating medium 543 is enclosed in tank body 21. Specifically, the volume of tank body 21 and the capacity of stored insulating medium 543 are set so that when insulating medium 543 thermally contracts in a state where insulating medium 543 is fully filled in hollow insulator body 511, insulating medium 543 can be replenished with an amount of insulating medium 543 equivalent to the amount of contraction when insulating medium 543 thermally contracts, and insulating medium 543 equivalent to the amount of expansion when insulating medium 543 thermally expands can be received. In the embodiment, insulating medium 543 is filled up to about half the height inside tank body 21.

[0043] When insulating medium 543 contracts due to the surrounding temperature environment, insulating medium 543 equivalent to the amount of contraction flows from liquid tank 20 into hollow insulator 510, and when insulating medium 543 expands, insulating medium 543 equivalent to the amount of expansion flows from hollow insulator body 511 into liquid tank 20. Since the vertical height of the bottom surface of the liquid storage space in tank body 21 is higher than the vertical height of the top surface of the liquid storage space in hollow insulator body 511 in a horizontal state, hollow insulator body 511 is always kept filled with insulating medium 543.

[0044] The intermediate fixing part 30 supports an intermediate part between the front end and rear end of the cable connection termination part 500 (insulator unit). In this embodiment, two intermediate fixing parts 30 are provided. The number of intermediate fixing parts 30 can be appropriately changed depending on the length of the cable connection termination part 500 (length of the insulator 510).

[0045] The intermediate fixing portion 30 has an intermediate supporting frame 31 that supports the hollow insulator body 511 , and a height adjusting portion 32 that is fixed perpendicularly to the pedestal base 11 and adjusts the height of the intermediate supporting frame 31 .

[0046] The intermediate support frame 31 has a lower support frame 31A disposed on the lower side and an upper support frame 31B disposed on the upper side. Note that the upper support frame 31B is omitted in Fig. 3. The lower support frame 31A and the upper support frame 31B are fixed to the height adjustment unit 32. With the intermediate portion of the cable termination connection part 500 placed on the lower support frame 31A, the upper support frame 31B is placed over and clamped therebetween, thereby fixing the intermediate portion of the cable termination connection part 500 to the intermediate support frame 31.

[0047] The lower support frame 31A and the upper support frame 31B each have a frame body 311 and an insulator tube receiving portion 312. The insulator tube receiving portion 312 has a shape that can fit the peripheral shape of the insulator tube main body 511, i.e., the uneven shape of the cap portion 511a, and fixes the peripheral surface of the insulator tube main body 511. Specifically, the insulator tube receiving portion 312 has an arc shape that can fit into the recess between the cap portions 511a and support the insulator tube main body 511. In this embodiment, three insulator tube receiving portions 312 are provided in each of the lower support frame 31A and the upper support frame 31B. The number of insulator tube receiving portions 312 can be changed as appropriate.

[0048] The height adjustment unit 32 is interposed between the frame 10 and the intermediate support frame 31, and adjusts the height of the intermediate support frame 31. The height adjustment unit 32 is formed, for example, by a pantograph type jack. The height adjustment unit 32 makes it possible to easily adjust the height of the intermediate support frame 31, and to attach the intermediate support frame 31 to the peripheral surface of the hollow insulator body 511 in an appropriate state.

[0049] 4A to 4D are diagrams showing an example of a process for fixing a cable connecting end 500, which is an example of an insulator unit, to the transportation device 1. FIG.

[0050] When the cable terminal connection part 500 is fixed to the transportation device 1, the upper fixing frame 121B of the frame 10 and the upper support frame 31B of the intermediate fixing part 30 are removed. The rectangular opening part of the rear end fixing frame 131 faces the vertical direction. If the insulating medium 543 is filled in the insulating tube body 511 in a state where the liquid tank 20 and the inside of the insulating tube body 511 are not connected, the insulating tube body 511 may be damaged due to thermal expansion of the insulating medium 543, so an appropriate amount of the insulating medium 543 is enclosed in the insulating tube body 511. The appropriate amount means a state in which the insulating medium 543 is not filled in the insulating tube body 511 as in the normal operation of the cable terminal connection part 500, and it is preferable to fill the insulating medium 543 to a height of 60 to 90% of the total length of the insulating tube body 511 at the stage of attachment to the transportation device 1 of FIG. 4A.

[0051] First, as shown in Fig. 4A, a sling 549 for lifting is attached to the eyebolt 548 attached to the fixing bracket 541 and the upper bracket 512 of the cable terminal connection part 500. The sling 549 is hoisted by a crane or the like to lift the cable terminal connection part 500 vertically upward, and the transportation device 1 or the cable terminal connection part 500 is moved to align the rear end fixing frame 131 of the frame 10 with the cable terminal connection part 500.

[0052] Next, as shown in FIG. 4B, the sling 549 is lowered, the cable termination connection part 500 is inserted into the rear end fixing frame 131, and the fixing metal fitting 541 is fixed to the rear end fixing frame 131.

[0053] 4C, the crane is moved while further lowering the sling 549. The cable termination connection part 500 rotates together with the rear end fixing frame 131 about the rotation axis via the bearing 133.

[0054] As shown in Fig. 4D, the sling 549 is further lowered, and the tip of the cable termination connection part 500 is placed on the lower fixing frame 121A of the frame 10. The upper fixing frame 121B is attached to the upper part of the lower fixing frame 121A, and the tip of the cable termination connection part 500 is clamped and fixed by the lower fixing frame 121A and the upper fixing frame 121B. In addition, the height adjustment part 32 of the intermediate fixing part 30 is adjusted so that the lower support frame 31A abuts against the insulator body 511. The upper support frame 31B is attached, and the intermediate part of the cable termination connection part 500 is clamped and fixed by the lower support frame 31A and the upper support frame 31B.

[0055] In this way, as shown in FIG. 2, the cable end connection part 500 is fixed to the pedestal 10 in a horizontal state. In this state, a drum pipe (not shown) prepared separately is connected to the one-touch coupler 546, and the insulating medium 543 is filled up in the hollow insulator body 511. In other words, the insulating medium 543 is filled up to 60 to 90% in the state of FIG. 4A, but the insulating medium 543 is replenished to fill up the remaining hollow portion and make it full. After being filled up, the liquid hose 22, 547 is connected via the one-touch coupler 23, 546. As a result, the inside of the hollow insulator body 511 of the cable end connection part 500 fixed to the pedestal 10 is connected to the inside of the tank body 21, and the insulating medium 543 in the hollow insulator body 511 is always kept in a full state.

[0056] As described above, the transportation device 1 and the transportation method according to the present embodiment have the following characteristics either alone or in appropriate combination.

[0057] That is, the transport device 1 is a transport device for transporting a cable termination connection part 500 (insulating pipe unit) in which an insulating medium 543 is enclosed in an insulating pipe main body 511, and includes a pedestal 10 capable of fixing the cable termination connection part 500 in a horizontal state, and a liquid tank 20 connected to the insulating pipe main body 511 and capable of flowing the insulating medium 543 in and out of the insulating pipe main body 511. The pedestal 10 has a pedestal base 11, a front end side fixing part 12 attached vertically to the pedestal base 11 and fixing the front end of the cable termination connection part 500, and a rear end side fixing part 13 attached vertically to the pedestal base 11 and fixing the rear end of the cable termination connection part 500. The liquid tank 20 is disposed on the pedestal 10 so that the vertical height of the bottom surface of the liquid storage space in the tank main body 21 is higher than the vertical height of the top surface of the liquid storage space in the insulating pipe main body 511 in the horizontal state.

[0058] In addition, the method of transporting the cable termination connection unit 500 (insulating pipe unit) in the embodiment includes a step of fixing the cable termination connection unit 500 to the frame 10 of the transportation device 1 (see Figures 4A and 4B), a step of connecting the insulating pipe main body 511 and the liquid tank 21 (see Figure 2), and a step of transporting the cable termination connection unit 500 to a destination while it is fixed to the transportation device 1.

[0059] According to the transport device 1 and the transport method, the insulating medium 543 is always kept in a fully filled state in the hollow insulator body 511, so that no liquid surface vibration occurs during transport. Therefore, the cable end connection part 500 (hollow insulator unit) can be safely transported to a destination such as a construction site with the insulating medium 543 enclosed in the hollow insulator body 511, and the installation work at the construction site can be facilitated. At the construction site, a predetermined amount of the insulating medium 543 is discharged from the hollow insulator body 511 through a flow path (not shown) provided in the fixing bracket 541 to obtain the amount of insulating medium 543 required for normal operation of the cable end connection part 500 (hollow insulator unit). Specifically, the insulating medium 543 is discharged until the insulating medium 543 is enclosed up to a height of 60 to 90% of the total length of the hollow insulator body 511. Therefore, it is no longer necessary to perform the oil filling work, which has taken a lot of time at the construction site, on-site, and the construction time at the construction site can be significantly reduced. In addition, it is no longer necessary to bring equipment such as gear pumps that were previously required for oil loading work at the construction site, making it possible to reduce the amount of construction equipment used on-site.

[0060] In addition, in the transportation device 1, the rear end fixing portion 13 has a rear end fixing frame 131 attached to the peripheral surface of the insulator main body 511, and a rear end support body 132 that rotatably supports the rear end fixing frame 131 around a rotation axis in a horizontal plane perpendicular to the axial direction of the cable termination connection portion 500 (insulator unit).

[0061] In addition, the method of transporting the cable termination connection unit 500 (insulating tube unit) in the embodiment includes the steps of fixing the cable termination connection unit 500 in a vertical position to the frame 10 of the transportation device 1 (see Figures 4A and 4B), rotating the cable termination connection unit 500 around the rotation axis to move it to a horizontal position (see Figures 4C and 4D), connecting the insulating tube main body 511 and the liquid tank 20 (see Figure 2), and transporting the cable termination connection unit 500 to a destination while it is fixed to the transportation device 1.

[0062] According to the transportation device 1 and the transportation method, after the cable end connection part 500 (insulating pipe unit) is transported in a horizontal state, the cable end connection part 500 can be easily rotated and moved to a vertical state at the construction site. Therefore, the cable end connection part 500 can be safely transported to a destination (for example, a construction site) in a state in which the insulating medium 543 is enclosed in the insulating pipe main body 511, and the installation work at the construction site can be further facilitated. At the construction site, a predetermined amount of the insulating medium 543 is discharged from the inside of the insulating pipe main body 511 through a flow path (not shown) provided in the fixing bracket 541 to obtain the amount of insulating medium 543 required during normal operation of the cable end connection part 500 (insulating pipe unit). Specifically, the insulating medium 543 is discharged until the insulating medium 543 is enclosed up to a height of 60 to 90% of the total length of the insulating pipe main body 511. Therefore, it is no longer necessary to perform the oil filling work, which has taken a lot of time at the construction site, on-site, and the construction time at the construction site can be significantly reduced. In addition, it is no longer necessary to bring equipment such as gear pumps that were previously required for oil loading work at the construction site, making it possible to reduce the amount of construction equipment used on-site.

[0063] In addition, in the transportation device 1, the frame base 11 can store the insulating medium 543 leaked from the hollow insulator body 511. As a result, even if the insulating medium 543 leaks from the hollow insulator body 511, it is stored in the recess 111 of the frame base 11, so that the damage caused by the oil leakage can be prevented from spreading to the outside.

[0064] The transportation device 1 also includes an intermediate fixing part 30 that supports an intermediate part between the front end and rear end of the cable connection termination part 500 (insulating tube unit), and the intermediate fixing part 30 has an intermediate part supporting frame 31 attached to the peripheral surface of the insulator body 511 and a height adjusting part 32 that can adjust the height of the intermediate part supporting frame 31. This makes it possible to appropriately adjust the height of the intermediate part supporting frame 31 to support the intermediate part of the cable connection termination part 500 in an appropriate state, and to transport the cable connection termination part 500 in a stable posture.

[0065] In addition, in the transportation device 1, the intermediate support frame 31 has a shape that can fit the peripheral shape of the hollow insulator body 511. This makes it possible to support the intermediate part of the cable termination connection part 500 in a more appropriate state, and to transport the cable termination connection part 500 in a stable posture.

[0066] In addition, in the transport device 1, the liquid tank 20 is connected to the hollow insulator body 511 via a one-touch coupler 23. This facilitates the oil filling and oil removal work of the insulating medium 543, and can shorten the work time.

[0067] In addition, in the transportation device 1, the tip side fixing part 12 has a tip fixing frame 121 attached to the peripheral surface of the upper metal fitting 512 of the cable termination connection part 500 (insulating tube unit), and the tip fixing frame 121 comes into multi-point contact with the peripheral surface of the upper metal fitting 512. This makes it possible to easily absorb axial misalignment of the cable termination connection part 500 and to hold it in a stable posture.

[0068] The invention made by the inventor has been specifically described above based on an embodiment, but the present invention is not limited to the above embodiment and can be modified within the scope of the gist of the invention.

[0069] For example, in the above embodiment, an example has been described in which the hollow insulator unit fixed to the transportation device according to the present invention is a cable end connection part, but the present invention is not limited to this, and the hollow insulator unit may be, for example, an equipment bushing (also called an "equipment penetration bushing"). The equipment side of the equipment bushing has a known shape compatible with oil insulation and / or gas insulation, and can be used for transformers or GIS (gas insulated switchgear).

[0070] In the case of an equipment bushing, the rear end side of the insulating tube of the insulating unit arranged in the hollow insulator body 511 has a head portion that can withstand oil insulation and / or gas insulation in the equipment, rather than a cable receiving port structure like the cable receiving portion 524. The head portion is formed in a known shape including a portion that tapers in diameter from the front end side to the rear end side (in other words, tapers in diameter toward the inside of the equipment to which it is attached) (for example, see the equipment side shape of the through bushing in FIG. 1 of Non-Patent Document 1 and the structure below the flange portion in FIG. 1 of Patent Document 3).

[0071] That is, when the hollow insulator unit fixed to the transportation device according to the present invention is an equipment bushing, the rear end side of the inner conductor does not have a conductor insertion portion for connecting the cable conductor, and the rod-shaped inner conductor penetrates and protrudes from the head portion at the rear end side of the insulating tube. The protruding rear end of the inner conductor may remain rod-shaped or may have a shield shape as a countermeasure against partial discharge. Also, a shielding metal fitting for alleviating the electric field at the head portion may be provided as appropriate.

[0072] Furthermore, when the insulator unit is the cable termination connection part 500, the rear end fixing frame 131 of the rear end side fixing part 13 of the transportation device 1 is fixed to the fixing metal fitting 541 of the cable termination connection part 500, but when the insulator unit is an equipment bushing, the rear end fixing frame 131 is fixed to a flange provided at the corresponding position of the equipment bushing (i.e., fastened to the lower metal fitting 513 provided integrally with the rear end of the insulator main body 511). The equipment bushing is fixed to the equipment by fixing this flange to the equipment.

[0073] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0074] 1 Transport device 10 Mounting stand 11 Mounting base 12 Tip side fixing part 13 Rear end side fixing part 14 Tank holder 20 Liquid Tank 21 Tank body 22 Fluid Hose 23 One-touch coupler 30 Intermediate fixed part

Claims

1. A transport structure for a hollow insulator unit, the hollow insulator unit including at least a hollow insulator body, a lower metal fitting integrally provided on a rear end of the hollow insulator body, and a fixing metal fitting fastened to the lower metal fitting and disposed on the rear end side of the hollow insulator body, for transporting the hollow insulator unit in a state in which an insulating medium is enclosed within the hollow insulator body, a stand capable of fixing the hollow insulator unit in a horizontal state; a liquid tank capable of allowing the insulating medium to flow in and out between the liquid tank and the insulating pipe body; a first liquid hose that connects a first flow path provided in the fixing metal fitting and the liquid tank and allows the insulating medium to flow in and out between the liquid tank and an inside of the hollow insulator body, The frame is A stand base and a tip-side fixing portion that is attached perpendicularly to the frame base and fixes a tip portion of the hollow insulator unit; a rear end fixing portion that is attached perpendicularly to the frame base and fixes a rear end portion of the hollow insulator unit, the liquid tank is disposed on the frame such that a vertical height of a bottom surface of a liquid storage space of the liquid tank is higher than a vertical height of a top surface of the liquid storage space in the hollow insulator body when the hollow insulator unit to be fixed is in a horizontal state, on the rear end side of the rear end fixing portion. Transport structure of hollow insulator unit.

2. The rear end fixing portion is a rear end fixing frame attached to a peripheral surface of the hollow insulator body, and a rear end support body that rotatably supports the rear end fixing frame around a rotation axis in a horizontal plane perpendicular to an axial direction of the hollow insulator unit. A transport structure for an insulator unit according to claim 1.

3. The first liquid hose is connected to the first flow path at a position above the liquid storage space in the hollow insulator body.

3. A transport structure for an insulator unit according to claim 1 or 2.

4. A second liquid hose is connected to a second flow path provided in the fixing bracket and enables the insulating medium to flow out from inside the hollow insulator body, the second liquid hose is connected to the second flow path at a position below a central axis of the hollow insulator unit.

3. A transport structure for an insulator unit according to claim 1 or 2.

5. The liquid tank is connected to the hollow insulator body via a one-touch coupler. A transport structure for an insulator unit according to claim 1.

6. The frame base is capable of storing the insulating medium leaked from the insulating pipe body. A transport structure for an insulator unit according to claim 1.

7. The mounting base is composed of a connecting body consisting of a plurality of base members, and the connecting portion has a partition wall having a height lower than the height of the side wall of the mounting base extending in the longitudinal direction. The transportation structure for an insulator unit according to claim 6.

8. The hollow insulator unit includes an upper metal fitting on a tip side of the hollow insulator body, a sling is attached to an insertion member attached to the fixing metal fitting and the upper metal fitting, and the hollow insulator unit can be lifted by lifting the sling.

3. A transport structure for an insulator unit according to claim 2.

9. an intermediate fixing portion for supporting an intermediate portion between the front end portion and the rear end portion of the insulator unit, the intermediate fixing portion includes a middle portion support frame attached to a peripheral surface of the hollow insulator body and having a shape that can be adapted to a peripheral surface shape of the hollow insulator body, and a height adjustment portion that can adjust a height of the middle portion support frame, the tip side fixing portion has a tip portion fixing frame attached to a peripheral surface of an upper metal fitting of the hollow insulator unit, the tip portion fixing frame is in multi-point contact with the circumferential surface of the upper fitting, A transport structure for an insulator unit according to claim 1.

10. a step of fixing the hollow insulator unit to the frame of the transportation structure for the hollow insulator unit according to claim 1; connecting the hollow insulator body and the liquid tank; and transporting the hollow insulator unit to a destination while the hollow insulator unit is fixed to the frame. Method of transporting hollow insulator units.

11. a step of fixing the hollow insulator unit in a vertical state to the frame of the transportation structure for the hollow insulator unit according to claim 2; a step of rotating the hollow insulator unit around the rotation axis to move it to a horizontal state; connecting the hollow insulator body and the liquid tank; and transporting the hollow insulator unit to a destination while the hollow insulator unit is fixed to the frame. Method of transporting hollow insulator units.

12. The insulating tube body is transported in a state where the insulating medium is filled in the insulating tube body. The method for transporting the hollow insulator unit according to claim 10 or 11.

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