JP2019092362A - Ground transformer device - Google Patents

Abstract

To provide a ground transformer device capable of improving cooling efficiency of a transformer unit and capable of satisfactorily discharging entering rainwater.SOLUTION: The ground transformer device includes: a transformer unit in which a transformer body is sealed in a tank; a primary compartment unit that accommodates a high voltage side terminal and a primary side bushing; a secondary compartment unit that accommodates a low voltage side terminal and a secondary side bushing; and an outer box that accommodates the transformer unit, the primary compartment unit, and the secondary compartment unit. The ground transformer device is installed on the ground. A vent is provided above the transformer unit and in a ceiling plate of the outer box, and a lower portion of the outer box is provided with a drain port.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a ground transformer device installed on the ground.

  The transformer unit installed on the ground such as in the site or on the road, the transformer unit in which the transformer body is sealed in the tank, the primary side bushing which connects the primary side conductor to the primary side of the transformer body, the transformer It has the secondary side bushing which connects the secondary side conductor to the secondary side of a main body, and the outer case which accommodates these. Also, the transformer device is provided with a cooling structure such as a gallery, for example, to cool the transformer portion.

  For example, Patent Document 1 discloses a transformer in which a transformer body is enclosed in a transformer tank filled with an insulating medium, a primary side bushing for connecting a primary side conductor to the primary side of the transformer body, and the transformer The secondary side of the main body includes a secondary side bushing for connecting the secondary side conductor, and a distribution box for storing the same, wherein the distribution box includes a first storage room for storing a transformer, the primary side bushing, and And / or a second storage chamber for storing the secondary side bushing, and an outside air introduction port is formed in a lower portion of the side plate facing the first storage chamber, and the second storage chamber faces the first storage chamber. Power distribution transformer devices in which an outside air outlet is formed on a ceiling plate.

JP 2007-266065 A

  In the ground transformer device, it is necessary to consider not only the temperature of the internal transformer portion but also the temperature of the entire transformer device including the outer case. Although a gallery is provided for cooling, the transformer unit has a structure covered by an outer box, so the transformer portion is difficult to cool, and the temperature rise is an obstacle to miniaturization.

  In Patent Document 1, an outside air introduction port is provided in the lower part of the side plate facing the first storage room storing the transformer, an outside air outlet is provided in the ceiling board facing the first storage room, and the outside air is introduced. It is stated that the cooling of the transformer is performed, but it is stated that the moisture contained in the outside air evaporates and disappears due to the heat generation at the time of operation of the transformer, and it is considered to positively discharge it Absent.

  An object of the present invention is to provide a ground transformer device capable of improving the cooling efficiency of the transformer unit and discharging the entering rainwater well.

One example of the “ground transformer device” of the present invention for solving the above problems is as follows:
A transformer unit in which a transformer main body is enclosed in a tank, a primary compartment unit for accommodating a high voltage side terminal and a primary side bushing, a secondary compartment unit for accommodating a low voltage side terminal and a secondary side bushing, and the transformer unit A ground transformer apparatus installed on the ground, comprising: an outer case for accommodating the primary compartment and the secondary compartment, wherein the ceiling plate of the outer case is above the transformer. A vent is provided, and a drain is provided at a lower portion of the outer case.

  ADVANTAGE OF THE INVENTION According to this invention, while improving the cooling efficiency of a transformer part, the approach rainwater can be discharged favorably.

  And the temperature of the outer case of a ground transformer apparatus and a transformer part can be spared, a ground transformer apparatus can be miniaturized, and the increase in cost can be suppressed.

It is a figure which shows the ground transformer apparatus of Example 1 of this invention. It is a side view showing the ground transformer device of Example 2 of the present invention. It is a side view which shows the modification of the ground transformer apparatus of Example 2 of this invention. It is a side view which shows the ground transformer apparatus of Example 3 of this invention. It is an upper top view which shows the ground transformer apparatus of Example 4 of this invention. It is a figure which shows an example of the conventional transformer device for grounds.

Before describing the embodiments of the present invention, the structure of the ground transformer device will be described.
FIG. 6 shows an example of the ground transformer device. 6 (a) is a front view of the ground transformer device, FIG. 6 (b) is a top plan view, FIG. 6 (c) is a side view, and FIG. 6 (d) is a rear view. The ground transformer device 1 has a transformer body enclosed in a primary compartment 2 for accommodating a high voltage side terminal and a primary side bushing, a secondary compartment 3 for accommodating a low voltage side terminal and a secondary side bushing, and a tank 7 It comprises a transformer portion 4, an outer case 5 for housing these, and an open / close door 6 for the outer case. The primary compartment 2 may be equipped with a disconnector and a protection mechanism.

  The outer case 5 has, for example, a box shape, and includes a bottom plate 5a, side plates 5b, a back plate 5c, and a ceiling plate 5d. At the upper and lower portions of the right side plate 5b and the back plate 5c of the outer box, vent holes called galleries 9a and 9b are provided. In the illustrated example, the primary compartment unit 2 is disposed on the left side, the transformer unit 4 is disposed on the back side, and the secondary compartment unit 3 is disposed on the front side. The primary and secondary compartments are defined in accordance with JIS C 0920 (Protection grade by electrical shell of enclosure (IP code)) clause 6 Protection against water ingress grade 3 "Protection against watering" It is done.

  In the ground transformer device shown in FIG. 6, the transformer unit 4 is cooled by the gallery 9 provided on the right side plate 5b and back plate 5c of the outer case. The outside air flowing in from the lower gallery 9a rises along the wave rib 7a provided on the side of the transformer tank 7 and takes in the heat of the transformer. Then, the elevated air is discharged from the upper gallery 9b to the outside and dissipates heat.

  However, since the upper gallery 9b is provided on the side plate 5b and the back plate 5c of the outer box 5, the flow path of the rising air is bent, and the air in the upper part of the outer box 5 is stagnant. The cooling efficiency of the

  The present invention is intended to increase the cooling efficiency of the transformer unit and to allow the rainwater that has entered to be discharged satisfactorily.

Hereinafter, embodiments of the present invention will be described based on the drawings.
In the drawings for describing the embodiments, the same components are denoted by the same names and symbols as much as possible, and the repetitive description thereof will be omitted.

  FIG. 1 shows a ground transformer device according to a first embodiment of the present invention. 1 (a) is a front view of the ground transformer device, FIG. 1 (b) is a top plan view, FIG. 1 (c) is a side view, and FIG. 1 (d) is a rear view. The ground transformer device 1 has a transformer body enclosed in a primary compartment 2 for accommodating a high voltage side terminal and a primary side bushing, a secondary compartment 3 for accommodating a low voltage side terminal and a secondary side bushing, and a tank 7 It comprises a transformer portion 4, an outer case 5 for housing these, and an open / close door 6 for the outer case. The outer case 5 has, for example, a box shape, and includes a bottom plate 5a, side plates 5b, a back plate 5c, and a ceiling plate 5d. In the illustrated example, the primary compartment unit 2 is disposed on the left side, the transformer unit 4 is disposed on the back side, and the secondary compartment unit 3 is disposed on the front side. A partition may be provided between the primary compartment 2 or the secondary compartment 3 and the transformer 4. Moreover, it is preferable that the primary compartment 2 and the secondary compartment 3 have an airtight structure in terms of insulation.

  In the present embodiment, the vent holes 10 are provided in the ceiling plate 5 d of the outer box of the ground transformer device. At that time, the position of the vent hole is at the top of the transformer unit 4 which is separated from the primary compartment 2 and the secondary compartment 3. Also, the position of the vent hole 10 is preferably at the top of the wave rib 7a provided around the transformer tank.

  By providing the vent holes 10 in the ceiling plate 5d of the outer box, the air flowing in from the lower gallery 9c rises along the wave rib 7a provided around the transformer tank, and the air with heat is the ceiling plate 5d The air is exhausted smoothly from the air vent 10 of the Therefore, heat-laden air can be efficiently exhausted without being stuck on the ceiling of the outer case.

  Further, in the present embodiment, the position of the lower gallery 9c is lowered, and a part of the vent holes of the lower gallery 9c is disposed below the height of the upper surface of the bottom plate 5a of the outer box. If vents 10 are provided in the ceiling plate 5d, rainwater intrudes into the transformer during rainfall, but a portion of the vents in the lower gallery 9c is disposed below the height of the upper surface of the bottom plate 5a of the outer box By doing this, a drainage flow path for rainwater is formed, and it is possible to drain the water that has entered the outer case from the vent holes 9c of the lower gallery. A drainage port may be provided in the side plate 5b or the back plate 5c of the outer box 5 separately from the lower gallery as a drainage flow path for rainwater.

  According to the present embodiment, by providing a vent hole in the ceiling plate of the outer box of the ground transformer device, the cooling efficiency of the transformer section can be increased, and the position of the lower gallery is lowered, and the upper surface of the upper plate of the outer box bottom plate By arranging a part of the lower gallery vents below the height, it is possible to well discharge the rainwater which has entered from the vents of the ceiling plate. And the temperature of the outer case of a ground transformer apparatus and a transformer part can be spared, a ground transformer apparatus can be miniaturized, and the increase in cost can be suppressed.

  FIG. 2 shows a ground transformer device according to a second embodiment of the present invention. FIG. 2 shows a right side view of the ground transformer device.

  In this embodiment, the top of the transformer tank is sloped. The top of the tank is sloped so that the gallery side is lower, and in the example shown, the back side is lower. If a gallery is provided on the right side of the outer box, the right side may be lowered. In addition, it is preferable that the slope of the upper surface of the tank be such that the entering rainwater flows toward the wave rib provided around the transformer tank, not the primary or secondary compartment.

  According to this embodiment, the rainwater which has entered from the vents of the ceiling plate can flow along the slope of the upper surface of the tank and can be favorably discharged from the vents of the lower gallery. In addition, it is possible to cool the transformer by further flowing rain water along the wave rib provided around the transformer tank and to further increase the cooling efficiency.

  In FIG. 3, the modification of the ground transformer apparatus of Example 2 of this invention is shown. In this modification, instead of providing a slope on the top of the transformer tank, the top cover 15 of the sloped transformer tank is attached to the upper side of the transformer tank. The inclination of the upper surface cover 15 is provided so that the back side becomes lower in the example of the drawing so that the gallery side becomes lower.

  In this modification, in addition to the effects of the embodiment of FIG. 2, the structure of the transformer itself does not have to be changed, and the top cover may be attached at an angle, so that the manufacture is easy.

  The ground transformer apparatus of Example 3 of this invention is shown in FIG. FIG. 3 shows a right side view of the ground transformer device.

  In the present embodiment, a vent is provided on the side surface of the ceiling plate 5d. Although not shown, it is preferable to provide a vent on the back side of the ceiling plate. By providing the vents on the sides of the ceiling plate, it is possible to increase the cooling efficiency of the transformer portion without stagnant air heated to the top of the outer box.

  The ground transformer apparatus of Example 4 of this invention is shown in FIG. FIG. 5 shows a top plan view of the ground transformer device.

  In this embodiment, a gallery is attached instead of providing a vent having a plurality of holes in the ceiling plate. That is, a large hole for gallery attachment is made in the ceiling plate 5d, and the gallery 13 is attached to this hole. According to this embodiment, the use of the gallery facilitates the formation of the vent. It is also removable and replaceable.

  As described above in each embodiment, according to the present invention, air having heat can be efficiently exhausted by forming a vent in the ceiling plate. Water entering from the vents of the ceiling plate can be drained from the lower outlet of the outer box. Then, the temperature of the ground transformer device can be spared, and the miniaturization and cost increase of the ground transformer device can be suppressed.

Reference Signs List 1 ground transformer device 2 primary compartment part 3 secondary compartment part 4 transformer part 5 outer box 5a outer box bottom plate 5b outer box side plate 5c outer box back plate 5d outer box ceiling plate 6 opening / closing door 7 transformer Tank 7a Tank Wave Ribs 9a Lower Gallery 9b Upper Gallery 9c Lower Lower Gallery 10 Ceiling Board Vents 11 Tilted Transformer Tank Tops 12 Ceiling Board Side Holes 13 Ceiling Board Gallery 15 Transformer Tank Top Covers

Claims (12)

A transformer unit in which a transformer main body is enclosed in a tank, a primary compartment unit for accommodating a high voltage side terminal and a primary side bushing, a secondary compartment unit for accommodating a low voltage side terminal and a secondary side bushing, and the transformer unit A ground transformer apparatus installed on the ground, comprising: an outer case accommodating the primary compartment and the secondary compartment;
The ceiling plate of the outer box is provided with a vent above the transformer section,
A transformer for ground, comprising a drain port at the lower part of the outer case. In the ground transformer device according to claim 1,
A ground transformer apparatus characterized in that a lower gallery for taking in outside air and an upper gallery for discharging air are provided on a side plate and / or a back plate of the outer box facing the transformer portion. In the ground transformer device according to claim 2,
The ground transformer device, wherein the drainage hole is formed by arranging the lower gallery such that a part of the vent holes of the lower gallery is lower than the upper surface of the bottom plate of the outer box. In the ground transformer device according to claim 1,
The ground transformer device according to claim 1, wherein the air vents of the ceiling plate are disposed at positions away from the primary compartment portion and the secondary compartment portion. In the ground transformer device according to claim 1,
The ground transformer device characterized in that the upper surface of the tank of the transformer is sloped so that the outlet side becomes lower. In the ground transformer device according to claim 5,
A ground transformer device comprising a cooling rib on a side of a tank of the transformer, and an inclination of an upper surface of the tank is formed so that a side of the cooling rib is lower. In the ground transformer device according to claim 1,
The ground transformer device characterized in that a transformer cover whose outlet side is lowered is attached above a tank of the transformer. In the ground transformer device according to claim 7,
The ground transformer device according to claim 1, further comprising: a cooling rib on a side surface of the transformer tank, wherein the transformer cover is mounted so that the cooling rib side is lower. In the ground transformer device according to claim 1,
The ground transformer apparatus characterized by providing a vent in the side and / or the back of the ceiling board of the said outer case. In the ground transformer device according to claim 1,
A ground transformer device characterized in that the primary compartment part and the secondary compartment part are airtight. In the ground transformer device according to claim 1,
The ground transformer device characterized in that the air vents of the ceiling plate of the outer case are formed by attaching a gallery to the ceiling plate. A ground transformer apparatus comprising: a transformer; and an outer case covering the transformer and installed on the ground,
In the upper part of the outer case, there is provided a gallery which penetrates the inside and the outside and passes air and does not pass the fluid, and a hole which penetrates the inside and the exterior and passes the air and passes the fluid in a part different from the gallery And
The hole portion is connected to a flow passage at a lower portion of the outer box or at a position lower than the hole portion and in a side surface portion of the outer box
A ground transformer device characterized by

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