Installation method for the pipe unit

Abstract

This invention provides a method for installing pipe units, which are heavy objects, after they have been transported to a destination such as a construction site, and then easily installed on an equipment stand. [Solution] When installing a pipe unit, which includes a pipe and a fixing bracket connected to the rear end of the pipe and fixed to the equipment frame via a support insulator, on an equipment frame, multiple lifting devices are connected to the fixing bracket so that the fixing holes on the bracket side are not blocked. The pipe unit is then lifted using the lifting devices and moved to the installation position. The support insulator fixed to the equipment frame is aligned with the fixing holes on the bracket side. With the alignment complete, the pipe unit is lowered and the support insulator is fixed to the fixing holes on the bracket side.

Description

Technical Field

[0005]

[0001] The present invention relates to a method for installing a bushing unit for installing a heavy bushing unit on an equipment pedestal.

Background Art

[0002] Conventionally, as a cable terminal connection part provided at the end of a power cable, an air terminal connection part that performs air insulation with a bushing is known. In a prefabricated air terminal connection part, generally, an insulating medium such as insulating oil (for example, silicone oil) is enclosed in the bushing.

[0003] Since it is difficult to transport a large terminal connection part vertically, it is usually transported horizontally in a lying-down state. In the case of a terminal connection part in which an insulating medium is enclosed in a bushing, after transporting the terminal connection part to the construction site in a horizontal state, the insulating medium is enclosed (hereinafter referred to as "oil filling") at the construction site. [[ID=!8]]

[0004] However, oil filling at the construction site takes time, and it is necessary to set up a clean room to avoid risks such as foreign matter mixing into the bushing, which lengthens the construction period. Also, when the insulating medium is a designated flammable substance, it is difficult to transport a large amount of the insulating medium to the construction site in a drum can due to the relationship of the designated quantity. In addition, in order to perform oil filling work at the construction site, equipment such as a gear pump was required at the construction site.

[0005] On the other hand, in order to facilitate the installation work at the construction site, it is also conceivable to transport the terminal connection part after oil filling at the factory. However, in order to prevent damage to the bushing due to thermal expansion of the insulating medium, the insulating medium cannot be filled to the brim of the bushing. Therefore, during transportation, liquid level vibration of the insulating medium occurs in the bushing, and the stability decreases due to the hammering action, and there is also a risk of leakage of the insulating medium.

[0006] To solve the above problems, the applicant has devised and filed a patent application for a transport device and a transport method for transporting insulator units, which can safely transport insulator units with an insulating medium sealed inside the insulator body to a destination such as a construction site, and which can facilitate installation work at the construction site (see Patent Document 1). [Prior art documents] [Patent Documents]

[0007] [Patent Document 1] Japanese Patent Publication No. 2024-073049 [Overview of the project] [Problems that the invention aims to solve]

[0008] While the transport device disclosed in Patent Document 1 allows for the safe transport of insulator units to their destination, it may make it difficult to install the insulator units on the equipment frame. Specifically, Patent Document 1 assumes that support insulators are fixed to oval-shaped fixing holes on the fixing brackets of the insulator units, and then fixed to the fixing holes on the equipment frame. However, since the position of the fixing holes on the frame is fixed for each piece of equipment on which the insulator units are installed, it is necessary to precisely align the position of the support insulators fixed to the fixing brackets with the position of the fixing holes on the frame. If the positions of the two are misaligned, the position of the support insulators must be adjusted along the oval-shaped fixing holes on the brackets, but this adjustment process is complicated, and forcibly moving the support insulators may damage them.

[0009] The objective of the present invention is to provide a method for installing pipe units, which are heavy objects, that allows them to be easily and appropriately installed on equipment frames after being transported to a destination such as a construction site. [Means for solving the problem]

[0010] The method for installing the pipe unit according to the present invention is: A method for installing a pipe unit on an equipment mounting frame, The insulator unit comprises an insulator and a fixing bracket connected to the rear end of the insulator and fixed to the equipment frame via a support insulator. The aforementioned fixing bracket has an oval-shaped fixing hole on the bracket side to which the support insulator is fixed. Multiple hanging devices are connected to the aforementioned fixing bracket so as not to block the fixing holes on the bracket side. Using the aforementioned lifting device, the pipe unit is lifted and moved to the installation position. Align the support insulator fixed to the equipment frame with the fixing hole on the fitting side. With the alignment complete, the pipe unit is lowered and the support insulator is fixed to the fixing hole on the fitting side. [Effects of the Invention]

[0011] According to the present invention, heavy pipe units can be easily and appropriately installed on equipment stands after being transported to a destination such as a construction site. [Brief explanation of the drawing]

[0012] [Figure 1] Figure 1 is a cross-sectional view showing a cable termination connection section, which is an example of a conduit unit. [Figure 2] Figures 2A and 2B are plan and cross-sectional views, respectively, of the fixing brackets. [Figure 3] Figure 3 is a side view showing a transport device according to an embodiment. [Figure 4] Figure 4 is a perspective view showing the frame of the transport device according to the embodiment. [Figure 5] Figures 5A and 5B are perspective and plan views showing the rear end fixing frame. [Figure 6] Figure 6 is a plan view showing the rear end fixing frame attached to the fixing bracket. [Figure 7A] Figure 7A shows the process of fixing the cable termination connector to the transport device. [Figure 7B] Figure 7B shows the process of fixing the cable termination connector to the transport device. [Figure 7C] Figure 7C is a diagram showing the step of fixing the cable terminal connection part to the transport device. [Figure 7D] Figure 7D is a diagram showing the step of fixing the cable terminal connection part to the transport device. [Figure 8] Figure 8 is a diagram showing the arrangement of the eye bolts in the upper fitting. [Figure 9A] Figure 9A is a diagram showing the step of installing the cable terminal connection part on the equipment pedestal. [Figure 9B] Figure 9B is a diagram showing the step of installing the cable terminal connection part on the equipment pedestal. [Figure 9C] Figure 9C is a diagram showing the step of installing the cable terminal connection part on the equipment pedestal. [Figure 9D] Figure 9D is a diagram showing the step of installing the cable terminal connection part on the equipment pedestal. [Figure 9E] Figure 9E is a diagram showing the step of installing the cable terminal connection part on the equipment pedestal.

Embodiments for Carrying Out the Invention

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

[0014] Figure 1 is a cross-sectional view showing a cable terminal connection part 500 which is an example of an insulating pipe unit. The cable terminal connection part 500 is an insulating pipe unit provided at the terminal of a cable terminal part (not shown), and is transported to a destination such as a construction site by a transport device 1 described later.

[0015] As shown in Figure 1, the cable terminal connection part 500 includes an insulating pipe 510, a fixing fitting (not shown), a terminal mounting fitting 542, a conductor extraction bar 544, etc. Hereinafter, the side from which the conductor extraction bar 544 is drawn out will be referred to as the "front end side", and the side to which the cable terminal part (not shown) is attached will be referred to as the "rear end side" for explanation.

[0016] The insulator 510 comprises an insulator body 511 with a cap portion 511a formed on its outer surface, an upper fitting 512 that seals the tip end of the insulator body 511, an insulating unit 520, an electric field mitigation portion 530, and an insulating medium 543.

[0017] The insulator body 511 may be, for example, a porcelain insulator, or a polymer insulator (also called a composite 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 plastic (FRP). A suspension device insertion member 551 through which a suspension device 549 can be inserted is attached to the upper fitting 512 (see Figure 8).

[0018] The insulating unit 520 has an axially extending internal conductor 521, an insulating cylinder 522 positioned on the outer circumferential surface of the internal conductor 521, and a shielding portion 523 formed on the outer circumferential surface of the insulating cylinder 522, and functions as a reinforcing insulating portion of the terminal connection portion 500. The internal conductor 521 and the insulating cylinder 522 are integrally formed by molding.

[0019] The internal conductor 521 is made of a conductive material suitable for electrical conduction, such as copper, aluminum, a copper alloy, or an aluminum alloy. The inner circumferential surface of the rear end of the internal conductor 521 is exposed from the insulating cylinder 522 and is provided with a conductor insertion portion 521a for electrically connecting a cable conductor (not shown). The front end of the internal conductor 521 passes through the insulating cylinder 522 and is connected to a conductor lead rod 544.

[0020] The insulating tube 522 is made of a hard plastic resin material with high mechanical strength (for example, epoxy resin or FRP). A cone-shaped terminal insertion portion 522a is provided at the rear end of the insulating tube 522 to receive the cable terminal portion (not shown). The terminal insertion portion 522a communicates with the conductor insertion portion 521a of the internal 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.

[0021] The shielding portion 523 is formed, for example, by applying conductive paint to the outer surface of the insulating cylinder 522. By providing the shielding portion 523, the electric field inside the insulating cylinder 522 is made uniform without concentration between the internal conductor 521 and the shielding portion 523, thereby stabilizing the electrical characteristics.

[0022] The electric field mitigation section 530 is formed from a cylindrical elastic body having an insulating section 531 at the front end and a conductive section 532 at the rear end. The insulating section 531 is concentrically connected to the conductive section 532 at its rear end and is formed cylindrically from an insulating rubber material such as ethylene propylene rubber (EP rubber). The conductive section 532 is formed cylindrically from a semiconducting rubber material such as semiconducting EP rubber. The insulating section 531 and the conductive section 532 are integrally formed by mold molding. The electric field mitigation section 530 is positioned so that the inner surface of the conductive section 532 and the shielding section 523 are electrically connected to the outer surface of the small diameter portion at the front end of the insulating unit 520, and the tip of the shielding section 523 does not protrude from the inner surface of the conductive section 532.

[0023] The fixing bracket 541 is a flange-shaped member having an opening 541a for passing through the insulating unit 520, as shown in Figures 2A and 2B. Figure 2A is a plan view of the fixing bracket 541, and Figure 2B is a cross-sectional view along the AA cutting line in Figure 2A. The fixing bracket 541 has, for example, a substantially square shape in plan view.

[0024] The fixing bracket 541 has fixing holes 541b on the bracket side for fixing the support insulator 545. The fixing holes 541b on the bracket side are arranged, for example, at rotationally symmetrical positions on concentric circles. In this embodiment, the fixing holes 541b on the bracket side are arranged at the four corners of a square, i.e., at positions that are 90° rotationally symmetrical. The fixing holes 541b on the bracket side have an oval shape, allowing the fixing position of the support insulator 545 to be adjusted.

[0025] The fixing bracket 541 is positioned on the rear end side of the insulator body 511 and is fastened, for example, by bolts to a lower fitting 513 integrally provided on the rear end of the insulator body 511. In addition, a support insulator 545 is positioned on the rear end side of the fixing hole 541b on the fitting side of the fixing bracket 541 and is fastened, for example, by bolts. The support insulator 545 is transported separately from the cable termination connection part 500 and assembled to the equipment frame 600 and the cable termination connection part 500 (fixing bracket 541) at the construction site.

[0026] The terminal mounting bracket 542 is a bottomed cylindrical member positioned on the outer circumferential surface of the rear end of the insulating unit 520. The bottom portion 542a of the terminal mounting bracket 542 is provided with an opening 542b for inserting a cable terminal (not shown). The terminal mounting bracket 542 is positioned on the rear end side of the fixing bracket 541 and is fastened to the fixing bracket 541 and the insulating unit 520, for example, by bolting.

[0027] The inner diameters of the fixing bracket 541 and the terminal mounting bracket 542 are approximately the same as the outer diameter of the rear end of the insulating unit 520. A sealing member (not shown), such as an O-ring, is placed between the fixing bracket 541 and the insulating unit 520. By interposing the sealing member between the fixing bracket 541 and the insulating unit 520, the inside of the insulator body 511 can be kept airtight or liquid-tight to prevent leakage of the insulating medium 543, and bending stress generated in the insulator body 511 can be alleviated. Preferably, multiple sealing members are provided at predetermined intervals in the axial direction.

[0028] The insulating medium 543 is sealed in the space between the outer pipe body 511 and the insulating unit 520 and functions as the main insulating part of the cable termination connection 500. The insulating medium 543 is formed of an insulating oil such as silicone oil.

[0029] The insulating medium 543 is injected into the interior of the insulator 510 (inside the insulator body 511) via a flow path (not shown) provided in the fixing fitting 541. A liquid hose 547 that allows the insulating medium 543 to flow in and out is connected to the flow path provided in the fixing fitting 541 (see Figure 3). The liquid hose 547 is preferably a high-pressure hose such as a flexible hose. A one-touch coupler 546 is provided at one end of the liquid hose 547, allowing for easy attachment and detachment of hoses for oil filling and draining (for example, the liquid hose 22 of the liquid tank 20).

[0030] The rear end of the conductor lead rod 544 is connected to the internal conductor 521 of the insulating unit 520, and the front end is pulled out to the outside through the upper fitting 512 of the insulator 510. The conductor lead rod 544 is connected to the internal conductor 521 of the insulating unit 520, for example, via a suitable conductor connecting member. The portion of the conductor lead rod 544 that is placed inside the insulator body 511 may also be a flexible conductor such as a cable.

[0031] Figure 3 is a side view showing a transport device 1 according to an embodiment. Figure 4 is a perspective view showing the frame 10 of the transport device 1. Figure 3 shows a state in which a cable termination connector 500, which is an example of an insulated pipe unit, is fixed to the transport device 1. When fixing it to the transport device 1, the cable termination connector 500 does not have a cable end connected to it, and a cover is attached to the rear end of the insulation unit 520 to prevent dust and other debris from entering the inside.

[0032] The transport device 1 employs several distinctive features to enable the safe transport of a cable termination connector 500 (an example of a pipe connector unit), in which an insulating medium 543 is sealed inside the pipe body 511, to its destination (e.g., a construction site) in a horizontal position.

[0033] As shown in Figure 3, the transport device 1 includes a frame 10, a liquid tank 20, and an intermediate fixing section 30, etc.

[0034] As shown in Figure 4, the frame 10 includes a frame base 11, a front end fixing part 12, a rear end fixing part 13, and a tank holding part 14, and is capable of fixing the cable termination connection part 500 in a horizontal position.

[0035] The support base 11 has a rectangular shape when viewed from the vertical direction. The support base 11 is installed in a horizontal position and supports the front end fixing part 12, the rear end fixing part 13, and the tank holding part 14. The support base 11 has a recess 111 that can store the insulating medium 543 leaked from the insulator body 511 of the cable termination connection part 500, and functions as a so-called oil pan. As a result, even if the insulating medium 543 leaks from the insulator body 511, it will be stored in the recess 111 of the support base 11, preventing the oil leak damage from spreading to the outside.

[0036] The mounting base 11 may be composed of one component or multiple components. In this embodiment, the mounting base 11 is composed of a connected body formed by linking three base components 11A to 11C. In this case, the length of the mounting base 11 can be easily adjusted according to the length of the cable termination connection part 500 (length of the insulator 510). Furthermore, by disassembling the mounting base 11, the storage space required for the mounting frame 10 can be reduced. Note that the number of base components constituting the mounting base 11 is not limited to three and can be changed as appropriate.

[0037] When the support base 11 is constructed as a connected body consisting of multiple base members, it is preferable that the height of the partition wall 112 formed at the connection point is lower than the side wall 113 of the support base 11 that extends 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) corresponding to the leakage point, and even if it accumulates to a height higher than the partition wall 112, it can easily move between the recesses 111 of adjacent base members, increasing the storage capacity. In addition, the partition wall 112 functions as a reinforcing material for the support base 11.

[0038] The tip-side fixing part 12 is mounted perpendicularly to the frame base 11 and fixes the tip of the cable termination connection part 500, specifically the upper fitting 512 of the insulator 510. The tip-side fixing part 12 has a tip-side fixing frame 121 for fixing the upper fitting 512, and a tip-side support 122 which is erected on the frame base 11 and supports the tip-side fixing frame 121.

[0039] 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 roughly U-shape, and when the lower fixing frame 121A and the upper fixing frame 121B are combined, they form a roughly square 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 connector 500 placed on the lower fixing frame 121A, the tip of the cable termination connector 500 is fixed to the tip fixing frame 121 by placing the upper fixing frame 121B over it from above and clamping it.

[0040] Furthermore, the lower fixing frame 121A and the upper fixing frame 121B each have a roughly U-shaped base and a roughly V-shaped retaining portion 123. By making multi-point contact between the tip of the cable termination connector 500 (specifically, the outer circumference of the disc-shaped upper fitting 512 in this embodiment) and the retaining portion 123, axial misalignment of the cable termination connector 500 can be easily absorbed, and the cable termination connector 500 can be held in a stable position.

[0041] The rear end fixing portion 13 is mounted perpendicularly to the frame base 11 and fixes the fixing bracket 541 located at the rear end of the cable termination connection portion 500, specifically at the rear end of the insulator 510. The rear end fixing portion 13 has a rear end fixing frame 131 for fixing the fixing bracket 541, and a rear end support 132 erected on the frame base 11 and supporting the rear end fixing frame 131.

[0042] The rear end fixing frame 131 has a shape that conforms to the external shape of the fixing bracket 541. In this embodiment, the rear end fixing frame 131 is a rectangular frame (see Figures 5A and 5B). Figure 5A is a perspective view of the rear end fixing frame 131, and Figure 5B is a plan view of the rear end fixing frame 131. Figure 6 shows the state in which the rear end fixing frame 131 is attached to the fixing bracket 541.

[0043] The rear end fixing frame 131 is formed, for example, by bolting four sheet metal members together at the four corners. The rear end fixing frame 131 is detachable from the fixing bracket 541 and can be disassembled and removed after the cable termination connection part 500 is installed on the equipment frame 600. The rear end fixing frame 131 has through holes 131a through which bolts for fixing to the fixing bracket 541 are inserted.

[0044] Furthermore, the rear end fixing frame 131 has a lifting device mounting hole 131b for connecting a lifting device 549 (a second lifting device 549B in this embodiment) such as a sling. There is one lifting device mounting hole 131b on each side of each of the four corners, that is, two holes per corner. A pair of lifting device mounting holes 131b are arranged symmetrically with respect to the metal fitting side fixing hole 541b. A connecting fitting 552 such as a shackle to which the lifting device 549 is connected may be attached to the lifting device mounting hole 131b, or the lifting device 549 may be attached directly.

[0045] In this embodiment, the second suspension devices 549B, each attached to a pair of connecting fittings 552 (specifically the first connecting fitting 552), are folded back and attached to a second connecting fitting 553 located at a distance of several tens of centimeters in the axial direction of the cable termination connection part 500 (the axial direction of the insulator 510). In other words, one second suspension device 549B is used for each pair of first connecting fittings 552. Furthermore, one end of the first suspension device 549A is attached to the second connecting fitting 553. The other end of the first suspension device 549A is inserted into a suspension device insertion member 551, such as an eyebolt, attached to the upper fitting 512, as will be described later.

[0046] The rear end fixing frame 131 is firmly fixed to the fixing fitting 541 of the cable termination connection 500, for example, by bolting. The rear end fixing frame 131 also has a rotation axis 131c that is perpendicular to the axial direction of the cable termination connection 500 (the axial direction of the insulator 510) in the horizontal plane. The rear end fixing frame 131 is attached to the rear end support 132 via a bearing 133 that acts as a bearing for the rotation axis 131c, and is rotatable around the rotation axis. The rear end fixing frame 131 is detachable from the rear end support 132.

[0047] The tank holding section 14 holds the liquid tank 20 on the upper part of a support that is mounted perpendicularly to the frame base 11. The height of the tank holding section 14 is set so that when the cable termination connector 500 is fixed horizontally to the frame 10, the vertical height of the liquid tank 20 is higher than the vertical height of the cable termination connector 500. The "vertical height of the liquid tank 20" refers to the vertical height of the lowest surface of the liquid storage space inside the tank body 21. The "vertical height of the cable termination connector 500" refers to the vertical height of the highest surface of the liquid storage space inside the insulator body 511 when it is in a horizontal state.

[0048] The liquid tank 20 comprises a tank body 21 and a liquid hose 22. A quick-connect coupler 23 is attached to the end of the liquid hose 22. The tank body 21 is fixed to the tank holding section 14 of the frame 10 and is connected to the insulator 510 via the liquid hose 22, 547, allowing the insulating medium 543 to flow in and out.

[0049] The tank body 21 is filled with an appropriate amount of insulating medium 543. Specifically, the volume of the tank body 21 and the capacity of the insulating medium 543 to be stored are set so that, when the insulating medium 543 is fully filled in the outer tube body 511, an amount of insulating medium 543 equivalent to the amount of shrinkage can be replenished when the insulating medium 543 shrinks due to heat, and an amount of insulating medium 543 equivalent to the amount of expansion when the insulating medium 543 expands due to heat. In this embodiment, the insulating medium 543 is filled to about half the height of the inside of the tank body 21.

[0050] When the insulating medium 543 contracts due to the ambient temperature, an amount of insulating medium 543 equivalent to the amount of contraction flows from the liquid tank 20 into the insulator 510. When the insulating medium 543 expands, an amount of insulating medium 543 equivalent to the amount of expansion flows from the insulator body 511 into the liquid tank 20. Because the vertical height of the lowest surface of the liquid storage space in the tank body 21 is higher than the vertical height of the highest surface of the liquid storage space in the horizontal insulator body 511, the insulator body 511 is always kept completely filled with insulating medium 543.

[0051] The intermediate fixing section 30 supports the intermediate portion of the cable termination connection section 500 (insulator unit) between the leading and trailing ends. In this embodiment, two intermediate fixing sections 30 are provided. The number of intermediate fixing sections 30 can be appropriately changed according to the length of the cable termination connection section 500 (length of the insulator 510).

[0052] The intermediate fixing section 30 includes an intermediate support frame 31 that supports the main body of the pipe 511, and a height adjustment section 32 that is fixed perpendicularly to the frame base 11 and adjusts the height of the intermediate support frame 31.

[0053] The intermediate support frame 31 has a lower support frame 31A positioned below and an upper support frame 31B positioned above. Note that the upper support frame 31B is omitted in Figure 4. The lower support frame 31A and the upper support frame 31B are fixed to the height adjustment section 32. With the intermediate portion of the cable termination connector 500 placed on the lower support frame 31A, the upper support frame 31B is placed over it from above and clamped in place, thereby fixing the intermediate portion of the cable termination connector 500 to the intermediate support frame 31.

[0054] The lower support frame 31A and the upper support frame 31B each have a frame body 311 and a pipe receiving portion 312. The pipe receiving portion 312 has a shape that can conform to the circumferential shape of the pipe body 511, that is, the uneven shape of the cap portion 511a, and fixes the circumferential surface of the pipe body 511. Specifically, the pipe receiving portion 312 has an arc shape that can fit into the recess between the cap portions 511a and support the pipe body 511. In this embodiment, the lower support frame 31A and the upper support frame 31B are each provided with three pipe receiving portions 312. The number of pipe receiving portions 312 can be changed as appropriate.

[0055] The height adjustment section 32 is interposed between the frame base 11 and the intermediate support frame 31, and adjusts the height of the intermediate support frame 31. The height adjustment section 32 is composed of, for example, a pantograph-type jack. The height adjustment section 32 allows for easy adjustment of the height of the intermediate support frame 31. This allows the intermediate support frame 31 to be properly attached and supported on the circumferential surface of the insulator body 511, and enables the cable termination connection section 500 to be transported in a stable position.

[0056] In this embodiment, in order to easily and appropriately install the cable termination connection part 500 onto the equipment frame 600, instead of connecting the suspension device 549 to the fixing bracket 541 as in the conventional method, the suspension device 549 is connected to the rear end fixing frame 131 while the rear end fixing frame 131 is fixed to the fixing bracket 541.

[0057] Figures 7A to 7D show an example of the process of fixing a cable termination connection part 500, which is an example of a conduit unit in the transport device 1.

[0058] When fixing the cable termination connector 500 to the transport 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 rear end fixing frame 131 is fixed to the circumferential surface of the fixing fitting 541 of the cable termination connector 500. In addition, a bearing 133 is attached to the rotating shaft 131c of the rear end fixing frame 131.

[0059] Furthermore, if the insulating medium 543 is completely filled into the insulator body 511 while the liquid tank 20 and the insulator body 511 are not connected, there is a risk that the thermal expansion of the insulating medium 543 may damage the insulator body 511. Therefore, an appropriate amount of insulating medium 543 is sealed inside the insulator body 511. An appropriate amount means that the insulator body 511 is not completely filled with insulating medium 543, similar to the normal operation of the cable termination connection part 500. When attaching it to the transport device 1 in Figure 7A, it is preferable to seal the insulating medium 543 to a height of 60-90% of the total length of the insulator body 511.

[0060] First, as shown in Figure 7A, a lifting device 549 is attached to the cable termination connection 500.

[0061] One end of the suspension device 549 is connected not to the fixing bracket 541, but to the suspension device mounting hole 131b of the rear end fixing frame 131 which is fixed to the fixing bracket 541. Specifically, each of the four suspension devices 549 is branched and connected to a pair of suspension device mounting holes 131b. One end of the suspension device 549 is connected, for example, to a first connecting fitting 552 (e.g., a shackle) attached to the suspension device mounting hole 131b. Connecting fittings may be provided at the branching portion of the suspension device 549.

[0062] In this embodiment, a second connecting fitting 553 is provided at the branching portion of the first suspension device 549A, and the first suspension device 549A on the tip side of the cable termination connection 500 and the second suspension device 549B on the rear end side of the cable termination connection 500 are connected so as to branch off via the second connecting fitting 553. That is, since four second suspension devices 549B are formed by folding back at the second connecting fitting 553 for four first suspension devices 549A, both ends of each second suspension device 549B are attached to eight first connecting fittings 552, respectively.

[0063] The other end of the first suspension device 549A is inserted through a suspension device insertion member 551 (an eyebolt in this embodiment) attached to the upper fitting 512. The suspension device insertion member 551 is positioned so as to protrude radially outward from the circumferential surface of the upper fitting 512, for example, as shown in Figure 8. The suspension device insertion member 551 is positioned so as not to interfere with the tip-side fixing part 12 (especially the pressing part 123) when fixing the cable termination connection part 500 to the transport device 1. The position of the hole in the suspension device insertion member 551 substantially coincides with the position of the metal fitting-side fixing hole 541b of the fixing fitting 541 in the axial direction of the cable termination connection part 500.

[0064] The lifting device 549 is lifted using a crane or the like to raise the cable termination connection 500 vertically upward, and the transport device 1 or the cable termination connection 500 is moved to align the frame 10 and the cable termination connection 500. Specifically, the rear end support 132 of the frame 10 is aligned with the rear end fixing frame 131 fixed to the cable termination connection 500.

[0065] Next, as shown in Figure 7B, the suspension device 549 is lowered and the bearing 133 attached to the rear end fixing frame 131 is fitted into the rear end support 132.

[0066] Next, as shown in Figure 7C, the crane is moved while the lifting device 549 is further lowered. The cable termination connection 500 rotates around the rotation axis via the bearing 133 together with the rear end fixing frame 131.

[0067] As shown in Figure 7D, the suspension device 549 is further lowered, and the tip of the cable termination connector 500 is placed on the lower fixing frame 121A of the frame 10. The upper fixing frame 121B is attached to the top of the lower fixing frame 121A, and the tip of the cable termination connector 500 is clamped and fixed by the lower fixing frame 121A and the upper fixing frame 121B (see Figure 8). In addition, the height adjustment part 32 of the intermediate fixing part 30 is adjusted so that the lower support frame 31A comes into contact with the insulator body 511. The upper support frame 31B is attached, and the middle part of the cable termination connector 500 is clamped and fixed by the lower support frame 31A and the upper support frame 31B.

[0068] In this way, the cable termination connector 500 is fixed to the frame 10 in a horizontal position (see Figure 3). In this state, a separately prepared drum (not shown) is connected to the quick-connect coupler 546 to fill the insulator body 511 completely with insulating medium 543. In other words, in the state shown in Figure 7A, the insulating medium 543 was filled to 60-90%, but the insulating medium 543 is replenished to fill the remaining void and make it full. After full filling, the liquid hoses 22 and 547 are connected via the quick-connect couplers 23 and 546. As a result, the inside of the insulator body 511 of the cable termination connector 500 fixed to the frame 10 is connected to the inside of the tank body 21, and the insulating medium 543 inside the insulator body 511 is always kept in a fully filled state.

[0069] With the transport device 1 and the transport method using the transport device 1, the insulating medium 543 is always kept completely filled inside the insulator body 511, so no liquid level vibration occurs during transport. Therefore, the cable termination connection part 500 (insulator unit) can be safely transported to the destination such as the construction site with the insulating medium 543 sealed inside the insulator body 511, and installation work at the construction site can be made easier. At the construction site, a predetermined amount of insulating medium 543 can be discharged from inside the insulator body 511 via the flow path (not shown) provided in the fixing fitting 541 to obtain the amount of insulating medium 543 required for normal operation of the cable termination connection part 500 (insulator unit). Specifically, the insulating medium 543 should be discharged until it is sealed to a height of 60-90% of the total length of the insulator body 511. Therefore, the oil filling work that previously required a great deal of time at the construction site does not need to be performed on-site, and the construction time at the construction site can be significantly reduced. Furthermore, it eliminates the need to bring equipment such as gear pumps, which were previously required for oil filling work at construction sites, thus reducing the amount of construction equipment used on-site.

[0070] Figures 9A to 9E show an example of the process of moving and installing a cable termination connection part 500, which is an example of a pipe unit, from the transport device 1 to the equipment stand 600.

[0071] First, as shown in Figure 9A, the lifting device 549 is lifted using a crane or the like. After the upper fixing frame 121B and upper support frame 31B are removed, the cable termination connection part 500, together with the rear end fixing frame 131, rotates around the rotation axis via the bearing 133 from the state shown in Figure 7D to a vertical position. At this time, the state of the lifting device 549 is the same as the state shown in Figure 7D.

[0072] Next, as shown in Figure 9B, the lifting device 549 is further lifted and the cable termination connector 500 is removed from the transport device 1. At this time, the rear end fixing frame 131 is also removed from the transport device 1 along with the cable termination connector 500.

[0073] Next, as shown in Figure 9C, the crane is moved to transport the cable termination connector 500 to the equipment frame 600, which is the installation location. The support insulator 545, which was transported separately from the cable termination connector 500, is pre-fixed to the frame-side fixing hole 601 of the equipment frame 600.

[0074] Next, as shown in Figure 9D, the support insulator 545 is aligned with the fixing hole 541b on the fixing bracket 541 while the suspension device 549 is lowered. Since the fixing hole 541b on the fixing bracket has an oval shape, the play of the elongated hole can be used to the fullest extent to align each of the four support insulators 545 fixed to the fixing hole 601 on the frame side so that it is inserted into the corresponding fixing hole 541b on the fixing bracket side. In addition, since the suspension device 549 is not connected to the fixing hole 541b on the fixing bracket side and it is open, the alignment work can be easily performed.

[0075] Next, as shown in Figure 9E, the suspension device 549 is lowered and the support insulator 545 is fixed to the fixing hole 541b on the fixing bracket 541. The rear end fixing frame 131 is also dismantled and removed from the cable termination connection part 500. In this way, the cable termination connection part 500 is installed on the equipment frame 600.

[0076] Thus, the installation method of the insulator unit according to the embodiment includes the following features, either individually or in appropriate combinations.

[0077] In other words, the installation method according to this embodiment is a method for installing a cable termination connection section 500 (infrared unit) on an equipment frame 600, wherein the cable termination connection section 500 comprises an infrared pipe 510 and a fixing bracket 541 connected to the rear end of the infrared pipe 510 and fixed to the equipment frame 600 via a support insulator 545, the fixing bracket 541 has an oval-shaped fixing hole 541b on the bracket side to which the support insulator 545 is fixed, a plurality of lifting devices 549 are connected to the fixing bracket 541 so as not to block the fixing hole 541b on the bracket side, the cable termination connection section 500 is lifted using the lifting devices 549 and moved to the installation position, the support insulator 545 fixed to the equipment frame 600 is aligned with the fixing hole 541b on the bracket side, the cable termination connection section 500 is lowered in the aligned state and the support insulator 545 is fixed to the fixing hole 541b on the bracket side.

[0078] When lifting and transporting the cable termination connector 500 (insulator unit), the fixing hole 541b on the fitting side is not blocked by the lifting device 549, and the support insulator 545, which is pre-fixed to the equipment frame 600, does not interfere with the lifting device 549. Therefore, the support insulator 545 and the fixing hole 541b on the fitting side can be easily aligned. In addition, the lifting device 549 does not become an obstacle when fixing the support insulator 545. As a result, the heavy cable termination connector 500 can be easily and appropriately installed on the equipment frame 600 after being transported to the destination such as the construction site.

[0079] In the installation method of this embodiment, the rear end fixing frame 131 (fixing frame) is fixed to the outer surface of the fixing bracket 541, and the lifting device 549 is connected to the rear end fixing frame 131. Specifically, the rear end fixing frame 131 is a component of the transport device 1 that transports the cable termination connection part 500 (insulator unit) in a horizontal state. This allows the lifting device 549 to be connected indirectly to the fixing bracket 541 without blocking the fixing hole 541b on the bracket side of the fixing bracket 541.

[0080] In the installation method of this embodiment, the rear end fixing frame 131 (fixing frame) is detachable. This allows the rear end fixing frame 131 to be easily removed after the cable termination connection part 500 (infraringe unit) has been installed on the equipment frame 600.

[0081] Furthermore, in the installation method of this embodiment, the suspension devices 549 are connected to rotationally symmetrical positions on the concentric circle of the rear end fixing frame 131 (fixing frame). Specifically, multiple suspension devices 549 are each connected to two symmetrical locations with respect to the metal fitting side fixing hole 541b of the rear end fixing frame 131. In addition, multiple suspension devices 549 are inserted into suspension device insertion members 551 which are attached to positions corresponding to the metal fitting side fixing hole 541b at the tip of the insulator 510. This stabilizes the posture when lifting and lowering the cable termination connection part 500, thereby improving the safety of the installation work.

[0082] Although the present invention has been specifically described above based on embodiments, the present invention is not limited to the above embodiments and can be modified without departing from its spirit.

[0083] For example, in the embodiments described above, an example was described in which the insulator unit to which the present invention can be applied is a cable termination connection part. However, the invention is not limited to this, and for example, the insulator unit may be an equipment bushing (also called an "equipment through bushing"). The equipment side of the equipment bushing has a known shape that can accommodate oil insulation and / or gas insulation, and can be used for transformers or GIS (gas-insulated switchgear).

[0084] In this embodiment, the lifting device 549 is connected to the rear end fixing frame 131 of the transport device 1. Alternatively, a separate fixing frame prepared for the installation of the pipe unit may be fixed to the fixing bracket 541, and the lifting device 549 may be connected to that frame.

[0085] Furthermore, in the installation method of the embodiment, a structure in which the intermediate support frame 31 has a lower support frame 31A positioned on the lower side and an upper support frame 31B positioned on the upper side has been described. However, in any of the embodiments shown in Figures 3, 7D, and 9A (before lifting the suspension device 549), the intermediate support frame 31 may be used only with the lower support frame 31A positioned on the lower side, without using the upper support frame 31B positioned on the upper side.

[0086] The embodiments disclosed herein should be considered in all respects to be illustrative and not restrictive. The scope of the present invention is indicated by the claims rather than by the foregoing description, and all modifications within the meaning and scope equivalent to the claims are intended to be included. [Explanation of Symbols]

[0087] 1 Transport device 13 Rear end side fixing part 131 Rear end fixing frame (fixing frame) 131b Mounting hole for suspension device 500 Cable termination connection unit (insulating pipe unit) 541 Fixing bracket 541b Fixing holes on the metal fitting side 545 Support Insulator 549 Lifting equipment 549A First lifting device 549B Second lifting device 551 Hanging device insertion member 552 First connecting fitting 553 Second connecting fitting 600 Equipment Stand 601 Mount side fixing hole

Claims

1. A method for installing a pipe unit on an equipment mounting frame, The insulator unit comprises an insulator and a fixing bracket connected to the rear end of the insulator and fixed to the equipment frame via a support insulator. The aforementioned fixing bracket has an oval-shaped fixing hole on the bracket side to which the support insulator is fixed. Multiple hanging devices are connected to the aforementioned fixing bracket so as not to block the fixing holes on the bracket side. Using the aforementioned lifting device, the pipe unit is lifted and moved to the installation position. Align the support insulator fixed to the equipment frame with the fixing hole on the fitting side. With the alignment complete, the pipe unit is lowered and the support insulator is fixed to the fixing hole on the metal fitting side. Installation method for the pipe unit.

2. The fixing frame is fixed to the outer surface of the aforementioned fixing bracket, The suspension device is connected to the fixed frame. A method for installing the pipe unit according to claim 1.

3. The aforementioned fixed frame is a component of a transport device that transports the pipe unit in a horizontal position. The method for installing the pipe unit according to claim 2.

4. The aforementioned fixed frame is dismantled. The method for installing the pipe unit according to claim 2.

5. Multiple of the aforementioned suspension devices are connected to rotationally symmetric positions on the concentric circles of the fixed frame. The method for installing the pipe unit according to claim 2.

6. Each of the aforementioned suspension devices is connected to two locations on the fixing frame that are symmetrical with respect to the fixing holes on the metal fitting side. The method for installing the pipe unit according to claim 5.

7. Multiple of the aforementioned suspension devices are inserted into suspension device insertion members that are attached to positions corresponding to the fixing holes on the metal fitting side at the tip of the outer pipe. A method for installing the pipe unit according to claim 1.

8. The aforementioned insulator is filled with an insulating medium. A method for installing the pipe unit according to claim 1.

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