JP5237136B2 - Transformer coil extraction jig - Google Patents

Description

  The present invention relates to a transformer coil extraction jig used when a coil in a transformer is extracted from an iron core.

  The coil of a transformer installed in a power plant, substation, or the like has a vertical cylindrical structure in which a thin copper conductor, insulating paper, or the like is spirally wound. An iron core is disposed at the center of a coil formed by spirally winding the conductor and the like. A predetermined insulator (for example, wood) is densely provided in the gap between the iron core and the inner peripheral surface of the coil. In the casing of the transformer, the three-phase coils (primary coil, secondary coil, and tertiary coil having different diameters) configured as described above are densely housed.

  By the way, in order to cope with an increase in capacity or aging of the transformer, it is necessary to dismantle and remove the existing transformer, and for that purpose, it is necessary to separate the iron core and the coil. In this case, after taking out the main body part which consists of an iron core, a coil, and incidental parts (for example, iron core retainer, coil retainer, and a connection conductor of a primary-third coil) from a casing, and disassembling the incidental parts, a crane, a chain block, etc. The coil must be lifted from the iron core to remove the coil from the iron core.

  Note that a transformer assembly apparatus is provided as a related prior art (see, for example, Patent Document 1).

JP-A-6-132150

  As described above, a predetermined insulator is densely provided in the gap between the iron core of the transformer and the inner peripheral surface of the coil, and coils for three phases are densely arranged in the transformer. Therefore, even if the coil is lifted by using a crane means and a wire or the like to be pulled out from the iron core, it is difficult to secure a gap through which the wire or the like is passed.

  In addition, since the coil is spirally wound and has a cylindrical shape, if a method of hanging the upper part of the coil and lifting it is used, an inward tightening force is generated in the spirally assembled conductor. Since this tightening force increases the frictional resistance with the iron core or the like installed at the axial center of the coil, it has been difficult to pull out the coil.

  Further, since the insulating oil soaks into the insulator and the coil expands inward and outward due to long-term use of the transformer, a large frictional resistance is generated when the coil is pulled out.

  Further, a coil wound in a spiral shape and in a cylindrical shape is more easily deformed than a metal having the same volume and weight when being lifted by a crane or the like. For this reason, in order to stably convey the coil after it has been pulled out, it has been necessary to suppress the deformation of the coil as much as possible when the coil is pulled out.

  In addition, in the prior art which concerns on the said patent document 1, the means to extract a coil from an iron core at the time of the disassembly of a transformer is not indicated.

  Therefore, it has been desired to provide a jig capable of easily and quickly pulling out the coil of the transformer from the iron core while suppressing deformation.

  This invention is made | formed in view of the above, Comprising: It aims at providing the transformer coil extraction jig | tool which can draw out the coil of a transformer from an iron core easily and rapidly, suppressing a deformation | transformation. .

  In order to achieve the above object, the present invention provides the following transformer coil drawing jig.

  (1) A transformer coil extraction jig used when a cylindrical coil is extracted from a transformer using a crane means, and is formed so as to be hookable on the bottom of the coil, and a support claw portion that supports the coil A plurality of coil support members having a staking engagement portion at the lower end portion, a coil engagement portion formed so as to be able to be satched with the engagement portion of the coil support device, and the crane means. An upper suspension having a crane locking portion formed so as to be able to be slung, and a wire member that fastens and fixes the coil support to the outer peripheral side of the coil in a state where the support claw is hooked on the bottom of the coil. And.

  According to the invention of (1), the cylindrical coil wound spirally around the iron core of the transformer is connected to the crane via the upper suspension while the bottom is supported by the support claw of the coil support. Since the coil is lifted by the means, the coil swells in the outer diameter direction, and a gap between the inner peripheral surface of the coil and the iron core becomes large. For this reason, the friction between the coil and the iron core when the coil is pulled up is reduced. Therefore, according to the invention of (1), the coil of the transformer can be easily and quickly pulled out from the iron core while suppressing deformation.

  (2) In the invention of (1), it is preferable that the upper suspension includes a plurality of sets of coil locking portions according to the diameter of the coil.

  According to the invention of (2), a plurality of types of coils having different diameters can be formed by one upper suspension device by laying the engagement portion for the coil corresponding to the diameter of the coil to be lifted and the engagement portion of the coil supporter. Can be lifted.

  (3) In the invention described in (1) or (2), it is preferable that the coil support includes a wire guide portion that guides the wire member in a horizontal direction.

  According to the invention of (3), when the coil support is fastened and fixed to the outer peripheral side portion of the coil by the wire member, the winding of the wire member is suppressed and the displacement of the wire member after fastening is suppressed. can do.

  ADVANTAGE OF THE INVENTION According to this invention, the coil of a transformer can be pulled out from an iron core easily and rapidly, suppressing a deformation | transformation.

It is a side view which shows the use condition of the transformer coil extraction jig | tool which concerns on embodiment of this invention. It is a fragmentary perspective view which shows a transformer coil extraction jig | tool. It is a side view which shows a coil support tool. It is a front view which shows a coil support tool. It is a side view which shows an upper suspension tool. It is a top view which shows an upper suspension tool.

  Embodiments of the present invention will be described below in detail with reference to the drawings. In addition, this invention is not limited by this embodiment.

  FIG. 1 is a side view showing a usage state of a transformer coil drawing jig according to an embodiment of the present invention, FIG. 2 is a partial perspective view showing a transformer coil drawing jig, and FIG. 3 shows a coil support. 4 is a front view showing the coil support, FIG. 5 is a side view showing the upper suspension, and FIG. 6 is a plan view showing the upper suspension.

  As shown in FIGS. 1 and 2, the transformer coil pulling jig 10 is cylindrical from the iron core (not shown) of a transformer (not shown) using crane means including a crane hook 6 and a wire 7. This is used when the coil 5 is pulled out.

  As shown in FIGS. 1 to 6, the transformer coil pulling jig 10 includes four coil supports 20, an upper suspension 30 that lifts the coil support 20, and the coil support 20 on the outer peripheral side of the coil 5. And a wire 22 to be fastened and fixed.

  As shown in FIGS. 1 to 4, the coil support 20 is formed so as to be hookable on the bottom of the coil 5, and has a substantially L-shaped support claw 21 that supports the coil 5 at the lower end, and is used for slinging. Is provided at the upper end. The coil support 20 is formed of, for example, H-shaped steel.

  The support claw portion 21 supports the bottom portion of the coil 5 by being inserted into a notch hole provided in advance in an insulating board (not shown) below the coil 5.

  The locking portion 24 is provided with a locking hole 24a for connecting the wire 15 via the shackle 8 (see FIG. 2). The coil support 20 is provided with reinforcing plates 25 and 26 at appropriate locations in order to ensure a predetermined strength.

  In addition, the coil support 20 includes two wire guide portions 23 (see FIGS. 1, 3, and 4) that guide the wire 22 in the horizontal direction in the longitudinal direction. When this wire guide part 23 fastens and fixes the coil support tool 20 to the outer peripheral side part of the coil 5 with the wire 22, it suppresses the oblique winding of the wire 22 and suppresses the positional deviation of the wire 22 after fastening. belongs to. The wire 22 is fastened by a lever block or the like (not shown).

  As shown in FIGS. 1, 2, 5, and 6, the upper suspension tool 30 is formed in a cross shape in plan view. The upper hanging tool 30 is made of, for example, H-shaped steel. A pair of crane locking portions 31, 31 formed so as to be able to be slung with the wire 7 is projected from the upper end portion of the upper hanging tool 30. The crane locking portion 31 is provided with a locking hole 31a for connecting the wire 7 (see FIG. 1) via a shackle (not shown).

  Further, a locking portion 32 for the coil formed so as to be able to be slung with the locking portion 24 of the coil support tool 20 protrudes from the lower end portion of the upper hanging tool 30. The coil locking portion 32 is provided with a locking hole 32a for connecting the wire 15 via the shackle 8 (see FIG. 2). That is, the coil locking portion 32 of the upper suspension 30 is connected to the locking portion 24 of the coil support 20 by the shackle 8 and the wire 15 as shown in FIGS. 1 and 2.

  The upper suspension 30 is provided with reinforcing plates 35, 36, and 37 to ensure a predetermined strength.

  As shown in FIGS. 1, 2, and 5, coil locking portions 33, 33 and a coil are provided at the lower end of the upper suspension 30 and inward of the coil locking portion 32. Locking portions 34, 34 are provided. The coil locking portions 33 and 34 are provided according to the diameter of the coil to be lifted. That is, the coil locking portions 33 and 33 are used when a coil having a diameter smaller than that of the coil 5 is lifted using the coil support 20.

  Similarly, the coil locking portions 34, 34 are used when lifting a coil having a smaller diameter than the coil lifted by the coil locking portions 33, 33. The locking portions 33 and 34 for the coils are provided with locking holes 33a and 34a for the same purpose as the locking holes 32a.

  As described above, the transformer coil pulling jig 10 is configured such that the coil locking portions 32, 33, and 34 and the locking portion 24 of the coil support 20 are sequentially slapped so that the primary coil and the secondary that have different diameters are arranged. The coil and the tertiary coil are configured so as to be lifted by one upper suspension tool 30.

  Next, a method for extracting the coil 5 from the iron core (not shown) of the transformer using the transformer coil extracting jig 10 will be described with reference to FIG. In addition, before the following work, the main body part which consists of an iron core, the coil 5, and incidental parts (For example, iron core holding | suppressing and coil holding | maintenance which are not shown in figure, the connection conductor of a 1-3rd coil, etc.) has already been taken out from the casing, It is assumed that the accessory parts have been dismantled and removed.

  First, the four coil supports 20 are equally arranged in the circumferential direction on the outer peripheral side portion of the coil 5. The coil support 20 is temporarily fixed to the outer peripheral side portion of the coil 5 with a wire 22. Further, the upper suspension tool 30 is horizontally lifted up to a predetermined height by the crane hook 6.

  Next, the coil support 20 and the upper suspension 30 are connected by the wire 15 or the like. Then, the support claw portion 21 of the coil support 20 is hooked on the bottom of the coil 5. The upper hook 30 is lifted by the crane hook 6 until just before the wire 15 is tensioned, being careful not to remove the support claw 21 from the bottom of the coil 5.

  Then, the four coil supports 20 are firmly fixed to the outer peripheral side portion of the coil 5 by fastening the wire 22 using a lever block (not shown) or the like. Subsequently, the upper suspension tool 30 is lifted by the crane hook 6.

  Then, since the cylindrical coil 5 wound spirally around the iron core of the transformer is lifted while being supported by the support claw portion 21 of the coil support 20, the coil 5 swells in the outer diameter direction. The gap between the inner peripheral surface of the coil 5 and the iron core is increased. For this reason, when the coil 5 is pulled out, the friction between the coil 5 and the iron core is reduced. Therefore, the coil 5 can be easily and quickly pulled out from the iron core while suppressing deformation.

  Also, when lifting a coil having a diameter smaller than that of the coil 5, the coil support 20 may be fixed to the coil in the same manner as described above. In other words, the coil locking portions 33 and 34 and the locking portion 24 of the coil support 20 may be hung in sequence.

  In this case, since the horizontal level of the upper suspender 30 has already been taken out, it is only necessary to perform the slinging operation between the coil locking portions 33 and 34 and the locking portion 24 of the coil support 20. The coil with a diameter can be quickly and easily pulled out.

  As described above, according to the transformer coil extraction jig 10 according to this embodiment, the coil 5 can be easily and quickly extracted from the iron core while suppressing deformation. Therefore, since the deformation of the coil 5 is suppressed, the coil 5 can be easily transported.

  In addition, according to the transformer coil drawing jig 10, the primary coil having a different diameter, the secondary coil, and the secondary coil can be obtained by sequentially staking the coil locking portions 32, 33, and 34 and the locking portion 24 of the coil support 20. The coil and the tertiary coil can be lifted by one upper lifting device 30.

  Further, by using the coil locking portions 32, 33, and 34 that match the diameter of the coil, the center of gravity of the coil can be easily obtained when the coil is lifted. For this reason, an increase in frictional resistance with the iron core or the like due to so-called slanting can be suppressed, and a stable drawing operation can be performed.

  Moreover, according to the transformer coil drawing jig 10, when the coil support 20 is fastened and fixed to the outer peripheral side portion of the coil 5 by the wire 22, the winding of the wire 22 after fastening is suppressed while suppressing the oblique winding of the wire 22. Misalignment can be suppressed.

  In the above-described embodiment, the four coil supports 20 are described as being used. However, the number of coils is not limited to four as long as a predetermined stability can be secured when the coil 5 is lifted. In that case, what is necessary is just to change suitably the structure (shape) of the upper suspension tool 30 according to the number of the coil support tools 20. FIG.

  Moreover, in the said embodiment, although demonstrated as what provides the two wire guide parts 23 in the coil support tool 20, it is not limited to this, You may provide one or three or more.

  Moreover, in the said embodiment, although demonstrated as what provided the latching parts 32, 33, 34 for three coils in the upper suspension 30, it is not limited to this, Two or depending on the diameter of the coil to lift Four or more may be provided.

  Moreover, in the said embodiment, although demonstrated as what forms the upper hanging tool 30 in planar view cross shape, it is not limited to this, Other shapes may be sufficient.

  Moreover, in the said embodiment, although the wire 22 was demonstrated to the example as a wire member, it is not limited to what is called a wire rope, A chain (chain), a belt, etc. may be sufficient, according to the load of the coil 5 suitably. Select and use.

5 Coil 6 Crane hook (crane means)
7 Wire (crane means)
DESCRIPTION OF SYMBOLS 10 Transformer coil extraction jig | tool 20 Coil support 21 Support nail | claw part 22 Wire (wire member)
23 Wire guide part 24 Locking part 30 Upper hanging tool 31 Locking part for crane 32, 33, 34 Locking part for coil

Claims (2)

A transformer coil extraction jig used when extracting a cylindrical coil from the iron core of a transformer using a crane means,
Four coil supports having a support claw portion formed on the bottom of the coil so as to be hookable and supporting the coil at the lower end and an engaging portion for slinging at the upper end.
Three sets of coil locking portions corresponding to the primary coil, secondary coil, and tertiary coil of the transformer formed so as to be able to be slung with the locking portion of the coil support, and the crane means can be slung. An upper hanging tool having a cross-like shape in plan view having a formed locking portion for a crane;
A wire member for fastening and fixing the coil support to the outer peripheral side of the coil in a state where the support claw is hooked on the bottom of the coil;
A transformer coil extraction jig comprising:   The transformer coil drawing jig according to claim 1, wherein the coil support includes a wire guide portion that guides the wire member in a horizontal direction.

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