JPH066491Y2 - Stacking transformer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to, for example, improvement of a so-called stacked transformer in which a plurality of distribution transformer main bodies are stacked and installed.

[Conventional technology]

In recent years, as part of the modernization of power distribution, there is an increasing demand for improving the appearance of overhead power distribution systems, mainly in urban areas. For this reason, it has been necessary to use a distribution transformer mounted on a power pole that has a shape that meets these requirements.

However, conventionally, for the distribution pole of the distribution transformer, in response to the load on the consumer side, for example, when a light load and a three-phase power load coexist in the vicinity, one A single-phase transformer with a large capacity for shared power for lights and a three-phase transformer dedicated to power with a relatively small capacity were separately installed on the utility pole. It was very uneconomical to install pole parts such as metal fittings and metal fittings according to the number of transformer pillars.

[Problems to be Solved by the Invention] In view of the above problems, recently, when a single-phase light load and a three-phase power load coexist in the vicinity, two units of the three-phase transformer are used instead of the three-phase transformer. The single-phase transformer is used to perform V connection so that, for example, a three-phase output of 200 V and a single-phase output of 100/200 V are obtained, and then the main bodies of the two single-phase transformers are connected. They were stacked, mounted in a cylindrical case, and attached to a telephone pole. In this way, when the main body of a plurality of transformers is housed in one case to perform the pillar mounting, not only can the material for the mounting pillar, such as the mounting brackets, be saved,
There is an advantage that the distribution transformer can be installed near the top of the utility pole with improved aesthetics.

However, as described above, when a plurality of transformer bodies are stacked in one cylindrical case to form a distribution transformer,
Conventionally, for example, four stoppers are provided on the bottom plate of the case to lock the four corners of the iron core tightening bracket of the lower transformer body, and the lower transformer body and the upper transformer body are different from each other. Use the iron core tightening metal fittings that are vertically arranged and fastened to both main bodies to fasten them with stud bolts, etc. to integrally fix the transformer main bodies arranged in the upper and lower stages, and further to the upper stage. Install a stud bolt on the iron core tightening bracket of the transformer body, fasten this bolt to the cover body of the case, lift this cover body together with the upper and lower transformer bodies and move it to the case. In this state, store it in the case, lock the iron core tightening bracket of the lower transformer body to the stopper provided on the case bottom plate, and then cover the cover body to the case with the cover tightening bolts. I was assembling a stacking transformer.

However, in the above configuration, since the upper and lower transformer bodies are directly fixed by stud bolts in a vertically arranged state, the transformer cores of the lower transformer body, for example, are in operation during operation of the transformer. However, when excited by the operation of the transformer,
Vibration noise is generated, and this vibration noise resonates with the vibration noise generated when the iron core of the upper transformer body is excited, and there is a problem that it propagates as a large noise outside the case via the stud bolt → cover body. It was

Also, when installing multiple transformers stacked in the vertical direction in the case, the transformers were housed in the case suspended by a chain block, so if the case is inserted in the case, It is difficult to quickly fasten the four corners of the iron core fastening metal fittings of the transformer main body of the lower stage to the fasteners provided on the bottom surface, and there is a problem that it takes time and effort to assemble the stacked transformers.

Furthermore, many stud bolts are required when assembling the upper and lower transformer bodies and the assembling of the upper transformer body and the cover body. In the case of tightening with bolts, if the bolts are overtightened, the coil presser may be uselessly pressed by the coil retainer inserted between the iron core tightening metal member and the coil, which may damage the coil itself.

In addition, in the transformer main body that is stacked on top and bottom, the coil retainer is inserted between the end surface of the coil and the iron core tightening fitting, so the transformer main body is stacked in this state. When housed in a case, it is difficult to satisfactorily convect the insulating oil in the case due to the presence of the coil retainer, which may adversely affect the cooling of the coil.

In view of the above problems, the present invention is capable of stacking a plurality of transformer bodies in a quick and reliable manner with a simple structure without generating vibration noise. An object of the present invention is to provide a stacking transformer excellent in mass productivity, which can be quickly positioned in a case to smoothly perform a stacking transformer assembling work.

[Means for Solving the Problems]

The present invention has a sound absorbing property such as rubber between the iron core fastening metal fittings mounted on the upper side of the transformer main body of the stacking means and the iron core fastening metal fittings mounted on the lower side of the upper transformer body. A stacking transformer is formed by stacking the upper and lower transformer bodies with an excellent cushioning member interposed therebetween, and by locking the iron core tightening metal fittings immovably by locking means. The upper and lower pair of transformer main bodies are connected by connecting plates at their side ends, and the iron core tightening metal fittings at the lower part of the transformer main body on the lower stage side are connected to the upper and lower parts, and a case corresponding to the tightening metal fittings. The bottom plate is formed with a concave portion on one side and a convex portion that fits into the concave portion on the other side, and further, a connecting plate and a connecting plate are provided on the open end side of the case for accommodating the stacked transformer bodies. The engaging guide guides are installed vertically, and the stacked transformer bodies are stored in the case. In this case, the upper and lower transformer main bodies are vertically stacked by the locking means via the cushioning member, and these transformer main bodies are connected by the connecting plate and then suspended. In this state, insert the transformer into the case with the connecting plate engaged along the guide guide provided in the case, and attach the core body to the transformer body in the lower stage, , The concave and convex members, which are provided so that they can be fitted to the case bottom plate and the corresponding case bottom plate, are engaged and housed in the case, and in this state, at the open end of the case, the guide guide and the connecting plate. And are fixed to form a stacking transformer.

[Action]

Since the present invention is configured as described above, even if a vibration sound is generated due to the excitation of the iron core during the operation of the stacked transformer, this vibration sound is interposed between the upper and lower transformer bodies. The cushioning member prevents the vibration sound from propagating outside the case, and when assembling the stacked transformer, it is immovable by the locking means of the upper transformer body on the lower transformer body. It is designed to be locked and mounted, and in this state both transformer bodies are connected and fixed by the connecting plate. Therefore, when stacking multiple transformer bodies, apply unnecessary pressure to the coil. It is possible to assemble stacked transformers without
At the time of accommodation in the case, since the connecting plate can be installed at a fixed position in almost one operation by using a guide guide provided vertically at the opening end of the case, the assembly work of this kind of transformer can be smoothly carried out. Moreover, it becomes possible to do it quickly and reliably,
The productivity of stacking transformers can be significantly improved.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

1 is a large-capacity single-phase transformer main body (hereinafter referred to as a single-phase transformer main body for electric light) that is commonly used for electric power for lights, and is equipped with a coil 3 on an iron core 2 and a coil retainer 4 is provided above and below the coil 3. With the iron core tightening brackets 5 and 6 on the iron core 2,
The lower-stage transformer body is constructed by fastening the yoke portion located below. Reference numeral 7 is a small-capacity single-phase transformer main body (hereinafter referred to as "power single-phase transformer main body") dedicated to power mounted on the upper side of the single-phase transformer main body 1 for electric light, and the coil 3a is assembled to the iron core 2a. At the same time, iron core tightening fittings 5a and 6a are fastened to the yoke portions located above and below the iron core 2a to form the upper stage transformer body.

Next, a structure for mounting the power single-phase transformer main body 7 on the electric light single-phase transformer 1 will be described.

FIG. 4 is an enlarged vertical cross-sectional view showing the portion P of FIG. 1, in which the lower iron core fastening metal fitting 6a of the power single-phase transformer main body 7 is pressed at the center in the length direction and the width direction. A cylindrical projection 8 is formed by processing, and a fixing hole 9 for the projection 8 is formed in the upper iron core tightening fitting 5 of the single-phase transformer 1 for electric light by pressing at a position corresponding to the projection 8. When the power single-phase transformer main body 7 is mounted, the cushioning member 10 having excellent sound absorbing properties such as rubber is placed around the fixing hole 9 drilled in the one iron core fastening member 5, By fitting the protrusion 8 projecting on the other iron core tightening metal 6a, the power single-phase transformer body 7 is prevented from rocking on the electric light single-phase transformer body 1 via the buffer member 10. Can be placed on. After vertically stacking both single-phase transformer main bodies 1 and 7 for electric lights and power as described above, a vertically long connecting plate having a U-shaped cross section on both side surfaces of both transformer main bodies 1 and 7. 11 and 12 are applied, and these connecting plates 11 and 12 are connected to the second
As shown in the figure, the iron core tightening fittings 5 and 6 are located above and below the single-phase transformer main body 1 for electric lights, and the iron core tightening fitting 5a is located above the single-phase transformer main body 7 for power. Tightening bolt 1
3 is fastened to fix the power single-phase transformer main body 7 on the electric lamp single-phase transformer main body 1 to form the stacked transformer 14.

Next, the stacking transformer 14 is installed in the case (see FIG. 3) 1
5 is accommodated in the bottom plate 15a of the case 15
The structure for engaging and holding the above will be described.

FIG. 5 is an enlarged vertical cross-sectional view showing an X portion of FIG. 1, in which a press is provided at a substantially central portion in the length direction and the width direction of the lower iron core fastening metal fitting 6 of the single phase transformer main body 1 for electric light. A cylindrical locking protrusion 16 is formed by processing, and the outer diameter of the case 15 bottom plate 15a is adjusted to fit the locking protrusion 16 at a position corresponding to the locking protrusion 16. When the stacking transformer 14 is inserted into the case 15, the engaging protrusion 16 of the iron core tightening fitting 6 is fitted into the engaging recess 17 of the case 15 bottom plate 15a. By combining them, the stacking transformer 14 can be securely held without moving to a predetermined position in the case 15.

When accommodating the stacking transformer 14 in the case 15, the stacking transformer 14 is positioned in the case 15 in one operation by using a guide guide 18 provided in the case 15 described below. be able to.

That is, FIG. 6 is an enlarged vertical sectional view showing the Y portion of FIG. 3, and the stacking transformer 14 is housed in the case 15 at the open end 15b of the case 15, as shown in FIG. In this case, vertically elongated guide guides 18, 18 are diagonally provided at positions corresponding to the hook portions 11a, 12a at one end of the connecting plates 11, 12, and the stacking transformer 14 is provided with the guide guides 18. 1
Inserting into the case 15 with the hook portions 11a and 12a of the connecting plates 11 and 12 slidingly engaged with 8 and 18 enables smooth and good insertion in one operation without rocking, and tightening of the iron core. The locking convex portion 16 provided on the metal fitting 6 can be automatically fitted into the engaging concave portion 17 of the bottom plate 15a of the case 15 to be housed and installed. After accommodating the stacking transformer 14 in the case 15, the hook portions 11a of the connecting plates 11 and 12 shown in FIG.
As shown in FIG. 6, the stacking transformer 14 can be fixedly supported on the case 15 without rocking by fastening the 12a and the guide guides 18, 18 with bolts 19 and nuts 20. it can. After that, a cover body (not shown) is attached to the open end of the case 15 to complete the assembly of the stacked transformer 14 configured by combining different kinds of single-phase transformer main bodies 1 and 7.

The guide guides 18, 18, which have been described above, may be installed on the bottom plate 15 along the axis of the case 15 from the opening end of the case 15, for example.
It is provided on the a side with a length dimension that is approximately half the height dimension of the case 15.

Needless to say, the stacking transformer 14 is connected in a predetermined manner before being inserted into the case 15.

[Effect of device]

Since the present invention is configured as described above, when a plurality of transformer bodies are stacked, the plurality of transformer bodies can be locked in one operation by the locking means to perform stacking work. Since a cushioning member such as rubber is interposed in the locking means, vibration noise generated during the operation of the transformer can be absorbed and alleviated, and a low-noise stacked transformer can be provided.

Also, since the stacked transformer bodies are integrally fixed at the side ends by the connecting plate, it is possible to fix the transformer bodies without specially pressing the coil of the stacked transformer. As a result, the upper-stage transformer body does not need to fix the coil by using a coil retainer, etc., so the upper-stage transformer body can have a simple structure, which can promote convection of insulating oil and provide excellent cooling performance. A loading transformer can be provided.

[Brief description of drawings]

FIG. 1 is a front view of the stacking transformer of the present invention, FIG. 2 is a side view, FIG. 3 is a plan view showing the stacking transformer inserted in a case, and FIG. 4 is a P portion of FIG. 5 is an enlarged cross-sectional view taken along line X in FIG. 1, and FIG. 6 is an enlarged cross-sectional view taken along line Y in FIG. 1 ... Lower-stage transformer body, 7 ... Upper-stage transformer body, 5,6,5a, 6a ... Iron core tightening metal fittings, 11,12 ... Connecting plate, 14 ... Stacking transformer, 18 ... Guide guide

Claims (1)

[Scope of utility model registration request] 1. A lower-stage transformer body in which a winding is wound around an iron core,
In the transformer in which the upper-stage transformer main body with the winding wound on the iron core is mounted on the lower-stage transformer main body, the upper iron core tightening fitting of the lower-stage transformer main body and the lower iron-core tightening of the upper-stage transformer main body are tightened. In the metal fitting, one iron core tightening metal fitting is provided with a protrusion, and the other iron core tightening metal fitting is formed with a fixing hole into which the projection fits to form a locking means. The upper-stage transformer body is loaded and locked on the lower-stage transformer body via a cushioning member, and further, both the lower-stage and upper-stage transformers are integrally fixed at their side end portions by a connecting plate. A stacking transformer characterized in that