Mobile power transformer

Abstract

To provide a mobile power transformer that can have a cable easily routed from a bushing and so on in any ambient environment for any working details.SOLUTION: A mobile power transformer comprises: a transformer body 2 which has a plurality of bushings 21, 22; a flat board type base 3 mounted on a vehicle; and a turntable 4 which is arranged on the base 3 to freely turn on an axis substantially perpendicular to the plane of the base 3, and is mounted with the transformer body 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a mobile transformer that is moved and used by a vehicle.

Background Art

[0002] Conventional mobile transformers are, for example, placed on an installation base with four legs, and in that state, they are loaded onto a truck and transported to the site. Then, the transformer body is unloaded from the truck while still placed on the installation base and installed and used at the site.

[0003] Also, a mobile power transformation device is known that can facilitate the work until operation at the site (see, for example, Patent Document 1). This device is configured such that a switch unit, a transformer unit, and a cubicle unit are mounted on the loading platform of one truck, and these are connected in advance so that at the site, it is only necessary to connect to a power transmission line and a load.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the conventional mobile transformers as described above, since the transformer body is used while being placed and fixed on the installation base, depending on the surrounding environment and work content at the site, cable routing and connection work from the bushings of the transformer body may be difficult in some cases. Such situations and difficulties are the same for the device described in Patent Document 1.

[0006] Therefore, an object of the present invention is to provide a mobile transformer that can easily route cables from bushings regardless of the surrounding environment or work content.

Means for Solving the Problems

[0007] In order to solve the above problems, the invention according to claim 1 is a mobile transformer comprising a transformer body having a plurality of bushings, a flat base placed on a vehicle, and a rotary table disposed on the base and rotatable about an axis substantially perpendicular to the plane of the base, on which the transformer body is placed.

[0008] The invention according to claim 2 is the mobile transformer according to claim 1, wherein the rotary table is movable forward and backward in a direction substantially perpendicular to the plane of the base, and the upper surface of the rotary table and the upper surface of the base are substantially flush in a state where the rotary table has moved backward.

[0009] The invention according to claim 3 is the mobile transformer according to claim 1 or 2, wherein a plurality of fixing means for fixing the transformer body are provided on the transformer body and the base.

Effects of the Invention

[0010] According to the invention described in claim 1, the mobile transformer is transported to the site with the base placed on the vehicle and the transformer body placed on the rotary table of the base. Then, by rotating the rotary table, that is, the transformer body, according to the surrounding environment or work content, the bushings are positioned in a desired direction. Therefore, regardless of the surrounding environment or work content, it is possible to easily route and connect cables from the bushings.

[0011] According to the invention described in claim 2, in a state where the rotary table has retracted (moved backward toward the base side), the upper surface of the rotary table and the upper surface of the base are substantially flush, so that the transformer body can be stably supported and placed by the rotary table and the base. Further, when it is desired to change the direction and orientation of the bushing, by advancing the rotary table (moving forward from the base), the transformer body can be separated from the base and smoothly rotated by the rotary table.

[0012] According to the invention described in claim 3, since a plurality of fixing means are provided on the base, by rotating the transformer body and fixing the transformer body with the surrounding fixing means, the transformer body can be stably fixed and placed.

Brief Description of the Drawings

[0013]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying Out the Invention

[0014] Hereinafter, this invention will be described based on the illustrated embodiments.

[0015] Figs. 1 and 2 are a schematic front view and a schematic plan view showing the mobile transformer 1 according to an embodiment of the present invention. As shown in Fig. 3, this mobile transformer 1 is a transformer that is moved to the site of use by a vehicle and used. In Fig. 3, it is loaded on the loading platform T1 of the truck T, but it may also be loaded on a trailer towed by a tractor or the like.

[0016] This mobile transformer 1 mainly includes a transformer body 2, a base 3, and a rotating table 4. As shown in Figs. 2 and 4, the transformer body 2 is rotatable within a substantially horizontal plane.

[0017] The transformer body 2 is a transformer having a plurality of bushings 21 and 22, and has a configuration equivalent to that of an off-the-shelf or existing transformer. In addition, there are three primary bushings 21 and three secondary bushings 22 respectively, and the tip sides (connection sides) of the primary bushings 21 and the tip sides of the secondary bushings 22 are arranged so as to face opposite directions. Further, a plurality of bolt insertion holes (dummy holes, fixing means) 23 for fixing the transformer body 2 to the base 3 are formed in the transformer body 2.

[0018] The base 3 is a flat base that is placed on a vehicle and supports the transformer body 2. As shown in Fig. 5, it includes a base body 31, a support beam 32, and a hydraulic jack 33. The base body 31 is made of metal and is a disk-shaped body with a substantially rectangular planar shape, and its size (planar area) and thickness are set so that the transformer body 2 can be stably placed and supported.

[0019] Support beams 32 made of metal and having an angular bar shape are arranged at both short sides of this base body 31. In addition, hydraulic jacks 33 are arranged at both ends of both support beams 32, and the capacity and load of the hydraulic jacks 33 are set so that the base body 31 with the transformer body 2 placed thereon can be raised and lowered.

[0020] Further, a rotary table 4, which will be described later, is disposed at the center of the base body 31, and a plurality of bolt holes (screw holes, fixing means) 31a for fixing the transformer body 2 are formed around the rotary table 4. That is, when the transformer body 2 is rotated as will be described later, a plurality of bolt holes 31a are formed at a predetermined pitch on the orbit where each bolt insertion hole 23 of the transformer body 2 is located. Thereby, by rotating the transformer body 2 by a predetermined angle (for example, 30 degrees at a time), inserting bolts into the bolt insertion holes 23 of the transformer body 2, and tightening them into the bolt holes 31a, the transformer body 2 can be fixed at that angular position.

[0021] The rotary table 4 is a round table that is rotatable around an axis substantially perpendicular to the plane of the base 3 and on which the transformer body 2 is placed, and is movable forward and backward (up and down) in a direction substantially perpendicular to the plane of the base 3. That is, as shown in FIG. 6, the table body 41, the rotary shaft 42, the rotary gear 43, and the stopper 44 are integrally laminated in order from above and concentrically to form the rotary table 4.

[0022] The table body 41 is a thin flat disk, and its size (planar area) and thickness are set so that the transformer body 2 can be lifted and lowered by receiving hydraulic pressure as will be described later. The rotary shaft 42 is a columnar shape with a diameter smaller than the diameter of the table body 41, and is set so that the area of the lower surface of the table body 41 (the surface excluding the rotary shaft 42) that receives hydraulic pressure as will be described later is ensured to be wide, and the transformer body 2 can be lifted and lowered. The rotary gear 43 is a columnar external gear, and in this embodiment, its outer diameter is set to be slightly larger than the outer diameter of the rotary shaft 42. The stopper 44 is a thin disk body, and its outer diameter is set to be slightly larger than the outer diameter of the rotary gear 43, and its thickness is set so that it can abut against the upper surface 314a of the stopper housing portion 314 described later and limit the upward movement and forward movement of the table body 41.

[0023] On one side, at the center of the base body 31 of the base 3, a table body housing portion 311, a rotating shaft housing portion 312, a rotating gear housing portion 313, and a stopper housing portion 314 are continuously formed in order from above and concentrically. The table body housing portion 311 is a space portion for housing and fitting the table body 41, and is formed in substantially the same shape as the table body 41. The rotating shaft housing portion 312 is a space portion and bearing portion for housing and pivotally supporting the rotating shaft 42, and is a circular hole having substantially the same diameter as the outer diameter of the rotating shaft 42.

[0024] The rotating gear housing portion 313 is a space portion for housing the rotating gear 43, and is in the shape of a circular hole having an outer diameter larger than the outer diameter of the rotating gear 43, and the upper side extends to the lower side of the rotating shaft 42. Thus, as shown in FIG. 6(b), even when the rotating table 4 makes a precession (advances upward from the base body 31), the rotating gear 43 can move within the rotating gear housing portion 313. The stopper housing portion 314 is a space portion for housing and fitting the stopper 44, and is in the shape of a circular hole having substantially the same diameter as the outer diameter of the stopper 44, and the upper side extends to the lower side of the rotating gear 43. Thus, as shown in FIG. 6(b), even when the rotating table 4 advances, the stopper 44 can move within the stopper housing portion 314.

[0025] Furthermore, when the rotating table 4 advances, the axial length and depth of the stopper housing portion 314 are set so that the stopper 44 abuts against the upper surface 314a of the stopper housing portion 314 to limit the advancing amount of the table body 41 (the protruding amount from the upper surface of the base body 31). Here, the protruding amount of the table body 41 from the upper surface of the base body 31 is set to such an extent (several millimeters) that the transformer body 2 placed on the table body 41 can be separated from the base body 31 and the transformer body 2 can rotate stably and smoothly.

[0026] In addition, a hydraulic path 315 extending from a hydraulic source and pump (not shown) to the lower side of the table body accommodating portion 311 is formed inside the base body 31. Then, the hydraulic pressure from the hydraulic source is supplied into the table body accommodating portion 311 through the hydraulic path 315, and as shown in FIG. 6(b), the rotary table 4 moves forward and upward. Also, when the hydraulic pressure is not supplied from the hydraulic source, as shown in FIG. 6(a), the rotary table 4 moves backward and downward (recedes toward the base body 31 side) due to its own weight, and the upper surface of the table body 41 and the upper surface of the base body 31 become substantially flush. Here, grooves or recesses may be provided on the lower surface of the table body 41 or the upper surface of the table body accommodating portion 311 to facilitate the supply of hydraulic pressure into the table body accommodating portion 311.

[0027] Furthermore, a drive gear (rack or gear, not shown) that meshes with the rotary gear 43 is provided inside the base body 31. When the drive gear is driven by a drive source and power source, the rotary gear 43 rotates, and the transformer body 2 placed on the table body 41 rotates. Here, when the rotary table 4 moves forward and backward, the drive gear may be disengaged from the rotary gear 43 (the meshing is released). Also, the drive gear may be driven so that the table body 41 rotates at predetermined angles (for example, every 30 degrees).

[0028] Next, the operation and movement of the mobile transformer 1 with such a configuration will be described.

[0029] First, the mobile transformer 1 is loaded onto the loading platform T1 of the truck T, and the mobile transformer 1 is transported to the use site. At this time, the rotary table 4 is retracted, the transformer body 2 is placed and supported by the base 3 and the rotary table 4, and the hydraulic jack 33 is retracted to stabilize the mobile transformer 1. At the use site, depending on the loading state and stability on the loading platform T1, etc., the mobile transformer 1 may be lowered to the ground using a crane or the like, or the mobile transformer 1 may remain loaded on the loading platform T1. Also, the hydraulic jack 33 may be extended according to the surrounding environment and work content, etc.

[0030] Next, according to the surrounding environment, work content, etc., rotate the four rotating tables, that is, the transformer body 2, to make the work easier. At this time, by moving the rotating table 4 forward, the transformer body 2 is separated from the base body 31 and rotates stably and smoothly. Then, at the rotated position, move the rotating table 4 backward and support the transformer body 2 with the base 3 and the rotating table 4. Insert the bolt into the bolt insertion hole 23 of the transformer body 2 and tighten it into the bolt hole 31a of the base 3 to fix the transformer body 2. In this state, connect the cables to the bushings 21 and 22 of the transformer body 2 and perform the necessary work.

[0031] As described above, according to this mobile transformer 1, by rotating the four rotating tables, that is, the transformer body 2, according to the surrounding environment, work content, etc., the bushings 21 and 22 are positioned in the desired directions. Therefore, regardless of the surrounding environment, work content, etc., it is possible to easily perform the routing and connection work of the cables from the bushings 21 and 22.

[0032] Also, in the state where the rotating table 4 moves backward and descends (moves backward toward the base 3 side), the upper surface of the table body 41 and the upper surface of the base body 31 are substantially flush, so it is possible to stably support and place the transformer body 2 with the rotating table 4 and the base 3. Also, when it is desired to change the direction, orientation, etc. of the bushings 21 and 22, by moving the rotating table 4 forward and ascending (moving forward upward from the base 3), the transformer body 2 can be separated from the base 3 and smoothly rotated by the rotating table 4.

[0033] Furthermore, since a plurality of bolt insertion holes 23 are provided in the transformer body 2 and a plurality of bolt holes 31a are provided in the base 3, by rotating the transformer body 2 and fixing the transformer body 2 with the surrounding bolt holes 31a, it is possible to stably fix and place the transformer body 2.

[0034] Although the embodiments of the present invention have been described in detail above, the specific configuration is not limited to this embodiment, and even if there are design changes etc. within the scope not departing from the gist of the present invention, they are included in the present invention. For example, in the above embodiment, the fixing means is constituted by the bolt insertion hole 23 and the bolt hole 31a, but it may be constituted by other members etc. For example, pin holes may be provided in the transformer body 2 and the base 3 to insert pins, and at this time, one of the pin holes may be an arc-shaped long hole.

[0035] Furthermore, fixing means for fixing the transformer body 2 and the rotary table 4 may be provided. For example, a bolt insertion hole 23 may be provided in the portion of the transformer body 2 facing the rotary table 4, and a bolt hole (threaded hole) may be provided in the portion of the rotary table 4 at the same position as this bolt insertion hole 23. Thereby, it becomes possible to stably rotate the transformer body 2.

[0036] Also, the rotation mechanism and the forward / backward movement (lifting) mechanism of the rotary table 4 are not limited to the above-described configuration and mechanism, and may be any type. For example, the rotary table 4 may be rotated using a rotary belt. On the other hand, depending on the weight of the transformer body 2 and the shape / state of the lower surface (as long as the transformer body 2 can be rotated smoothly), it may not be necessary to raise and lower the rotary table 4. That is, only a rotation mechanism may be provided.

Explanation of Reference Numerals

[0037] 1 Mobile transformer 2 Transformer body 21 Primary bushing 22 Secondary bushing 23 Bolt insertion hole (fixing means) 3 Base 31a Bolt hole (fixing means) 4 Rotary table T Track (vehicle)

Claims

1. A transformer body having a plurality of bushings, A flat base mounted on a vehicle, A rotary table disposed on the base, rotatable about an axis substantially perpendicular to the plane of the base, on which the transformer body is placed, A mobile transformer characterized by comprising the above.

2. The rotary table is movable forward and backward in a direction substantially perpendicular to the plane of the base, and the upper surface of the rotary table and the upper surface of the base are substantially flush in a state where the rotary table has moved backward. The mobile transformer according to claim 1, characterized by the above.

3. A plurality of fixing means for fixing the transformer body are provided on the transformer body and the base. The mobile transformer according to any one of claims 1 or 2, characterized by the above.

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