JPH08124765A - Stationary induction apparatus - Google Patents

Abstract

PURPOSE: To obtain a soundproof device for a stationary induction apparatus, such as the transformer, which can be moved together with a tank and can be reduced in area of installation. CONSTITUTION: Rear plates 14 are fitted to an outer sound-insulating plate 13 with clearances in between and the end section of the plate 13 is bent at right angle. The bent part of the plate 13 is supported by a tank reinforcing member 11a by putting the bent part on the member 11a with a vibration-proof member 12a in between and the plate 13 is fitted to tank reinforcing members 11a and 11b through a vibration-proof members 12b. Therefore, the sound- insulating characteristic of a stationary induction apparatus can be improved by the sound-insulating plate 13 constituted in the double-wall structure and the area of installation of the apparatus can be improved as compared with a stationary induction apparatus using a separately placed sound insulating plate by directly fitting the plate 13 to the tank.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a soundproof device for reducing the noise of static induction equipment such as transformers and reactors.

[0002]

2. Description of the Related Art FIG. 11 is a sectional view of a conventional transformer for reducing noise. In the figure, 1 is an iron core, 2 is an iron core 1
Winding wound around the coil 3, reference numeral 3 is a tank for storing a solid structure composed of the iron core 1 and winding 2, and 4 is an insulating medium enclosed in the tank 3 for insulating and cooling the iron core 1 and the winding 2. Is. Generally, oil or gas is used as the insulating medium 4.
Reference numeral 5 is a soundproof wall arranged so as to surround the tank 3, and 6 is a sound absorbing material adhered to the inner surface thereof.

Next, the operation will be described. When the transformer is in operation, the iron core 1 undergoes magnetostrictive vibration due to the voltage applied to the winding 2. The sound generated by this magnetostrictive vibration passes through the insulating medium 4 and the tank side plate 3a and is radiated into the air. Further, the magnetostrictive vibration is transmitted from the iron core 1 to the tank bottom plate 3b, and the tank side plate 3a.
Sound is radiated into the air due to the vibration of the tank side plate 3a, which becomes noise. Therefore, conventionally, as shown in FIG. 11, a soundproof wall 5 having a sound-absorbing material 6 attached to the inside of the tank 3 so as not to contact the tank 3 as shown in FIG.
(Hereinafter, a separate soundproof wall) was provided to reduce noise by insulating or absorbing noise from the transformer.

[0004]

Since the conventional separate type soundproof wall is installed so as not to come into contact with the tank, it cannot be moved when assembled for the factory test, and after the factory test is completed, it is sent to the site. They have to be dismantled and reassembled on site for delivery. Also, because it is a separate type,
There is a problem that the installation area becomes large.

The present invention has been made in order to solve the above problems, and it is an object of the present invention to obtain a soundproofing device which can move a transformer with the soundproofing device attached and can reduce the installation area. Has an aim.

[0006]

In a stationary induction device according to claim 1 of the present invention, an outer soundproof plate is attached to a tank side portion, and a back plate is attached between the outer soundproof plate and the tank side plate to form a double layer. In addition to having a wall structure, the end portion of the outer soundproofing plate is bent at a right angle, and the bent portion is placed on and supported by the upper portion of the tank reinforcing member via a vibration damping member.

In the stationary induction device according to the second aspect of the present invention, a sandwich steel plate in which a damping material is sandwiched between steel plates as outer soundproof plates and joined is used.

In the stationary induction device according to the third aspect of the present invention, the sound absorbing material is arranged between the outer soundproof plate and the back plate and between the back plate and the tank side plate.

In the stationary induction device according to the fourth aspect of the present invention, the porous structure is arranged between the outer soundproof plate and the back plate and between the back plate and the tank side plate.

In the stationary induction device according to the fifth aspect of the present invention, the porous structure is attached with a thermoplastic member interposed.

In the stationary induction device according to the sixth aspect of the present invention, the tank reinforcing member is formed in a channel shape.

In the stationary induction device according to the seventh aspect of the present invention, the outer soundproof plate is attached so as to cover the entire tank side plate, and the upper end thereof is attached to the overhanging piece of the tank upper wall via the vibration isolating member. It is a thing.

[0013]

In the stationary induction device according to the first aspect of the present invention, the outer soundproofing plate is supported by the structure of being placed on the upper part of the tank reinforcing member, so that the tank and the soundproofing plate can be moved together and installed. The area can be reduced. Further, the tank reinforcing member can be covered with the soundproof plate, and the assembling can be facilitated. Furthermore, by bending the end of the soundproof plate, the rigidity of the soundproof plate can be improved, and by mounting the back plate at a distance from the soundproof plate, the transmission loss can be increased as a double wall structure, so the sound insulating effect can be achieved. Can be improved.

In the stationary induction device according to the second aspect of the present invention, since the sandwich steel plate is used as the outer soundproof plate, vibration of the outer soundproof plate can be prevented and the soundproof effect can be further enhanced.

In the stationary induction device according to the third aspect of the present invention, the sound absorbing material prevents the sound pressure inside the soundproof plate from rising, so that the soundproofing effect can be further enhanced.

In the stationary induction device according to the fourth aspect of the present invention, the porous structure can prevent the sound pressure inside the soundproof plate from rising, and the sound insulating effect of the porous structure itself can enhance the soundproof effect.

In the stationary induction device according to the fifth aspect of the present invention, as the temperature of the stationary induction device rises, the stationary induction device is adhered by the thermoplastic member and the adhesion is improved, whereby the attachment structure of the porous structure is improved. The simplification and mounting workability can be improved, and the soundproof effect can be enhanced.

In the stationary induction device according to the sixth aspect of the present invention, by constructing the tank reinforcing member in the channel shape, it is possible to improve the strength of the tank and facilitate painting.

In the stationary induction device according to the seventh aspect of the present invention, since the entire tank height is covered with the soundproof plate, the soundproof effect can be enhanced.

[0020]

【Example】

Example 1. Hereinafter, a low noise transformer according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a sectional view showing the first embodiment. In the figure, the same parts as those in the prior art are designated by the same reference numerals, and the description thereof will be omitted. Reference numerals 11a and 11b denote upper and lower reinforcing members provided so as to project to the outside of the tank side plate 3a, each having a vertical piece 11c at its end, and a horizontal piece 11d bent at a right angle at the upper end of the upper reinforcing member 11a. Has been formed. Reference numeral 12a is a vibration damping member arranged on the upper horizontal piece 11d of the reinforcing member 11a, and 12b is a vibration damping member arranged outside the vertical piece 11c of each of the reinforcing members 11a and 11b. Reference numeral 13 denotes an outer soundproof plate having a horizontal bent portion 13a at its upper end. The outer soundproof plate 13 has its horizontal bent portion 13a mounted on the tank reinforcing member 11a via the vibration isolating member 12a. The side portions of the outer soundproofing plate 13 are attached to the side portions of the tank reinforcing members 11a and 11b via the vibration damping member 12b in order to prevent the left and right shakes. At this time, since the vibration damping member 12a receives the mass of the entire soundproofing plate, the shearing load is not applied to the vibration damping member 12b. As the vibration isolation members 12a and 12b, for example, vibration isolation rubber or disc springs are used. Next, 14 is a back plate, and the outer soundproof plate 13
It is attached to the tank side of the above through a support member 15 at a distance from the outer soundproof plate 13.

Next, the operation will be described. During the operation of the transformer, the iron core 1 produces magnetostrictive vibration due to the electric power applied to the winding 2.
The sound generated by this magnetostrictive vibration passes through the insulating medium 4 and the tank side plate 3a and is radiated into the air. Further, the magnetostrictive vibration is transmitted from the iron core 1 to the tank bottom plate 3b and then to the tank side plate 3a, and the tank side plate 3a vibrates to emit sound into the air. By the way, in this structure, these sounds are insulated by the double wall of the outer soundproofing plate 13 and the back plate 14. At this time, when the vibration of the tank 3 is transmitted to the outer soundproofing plate 13, the outer soundproofing plate is Since 13 itself vibrates and becomes a drive source, the outer soundproofing plate 13 is attached to the vibration isolating member 1.
Vibration-proof support is provided to the tank 3 via 2a and 12b, and due to the double wall structure of the soundproof plate 13 and the back plate 14, excellent sound insulation characteristics are obtained. Further, by directly attaching the soundproof plate to the tank, the tank and the soundproof plate can be moved together, and the installation area can be reduced as compared with the separately installed soundproof plate shown as a conventional example.

Example 2. In the above embodiment, as shown in the enlarged view b of the portion A of FIG. 2A, when a sandwich steel plate in which a damping material 17 is sandwiched between two steel plates 16 is applied as the outer soundproof plate 13, Vibration of the soundproof plate 13 can be prevented, and the soundproof effect can be further enhanced.

Example 3. In addition to the first embodiment, as shown in FIG. 3, between the outer soundproof plate 13 and the back plate 14, and
The sound absorbing effect can be further enhanced by disposing the sound absorbing material 18 such as glass wool or rock wool between the back plate 14 and the tank side plate 3a to prevent the sound pressure inside the sound insulating plate from rising.

Example 4. In addition to the first embodiment, as shown in FIG. 4, between the outer soundproofing plate 13 and the back plate 14, and
By disposing the porous structure 19 between the back plate 14 and the tank side plate 3a via the support member 15, it is possible to prevent the sound pressure inside the soundproof plate from rising and to prevent noise by the sound insulation characteristics of the porous structure 19 itself. The effect can be enhanced. As the porous structure, for example, there is one proposed in Japanese Patent Application No. 1-110996, “Porous Structure”.

Embodiment 5 FIG. FIG. 5 shows Example 5,
This is the support member 1 for the porous structure 19 in Example 4.
5. A member 20 having thermoplasticity is arranged in the fixing portion with 5, and is fixed by using a fixing member 21. In this case, when the temperature of the transformer rises, the member is adhered by the thermoplastic member 20 and the adhesiveness is improved. Is improved, the porous structure 19
The mounting structure can be simplified and the mounting workability can be improved, and the sound absorbing effect of the porous structure 19 can be enhanced.

Embodiment 6 FIG. Here, the amount of noise reduction by the outer soundproof plate 13 depends on how much the soundproof plate covers the surface area of the transformer. Therefore, the cost can be minimized by changing the size of the soundproof plate according to the noise specification value. In the explanation so far,
Although the embodiment has been shown in which the lower side of the tank is covered with the upper reinforcing member 11a, an example of mounting the soundproof plate when the size of the soundproof plate is changed is shown in FIGS. 6 and 7. FIG. 6 shows a case where only the central portion of the tank height is covered with a soundproof plate, and FIG. 7 shows a case where the entire tank height is covered. In FIG. 7, a protruding piece 3c is formed by protruding the upper wall of the tank 3 to the outside, and the outer soundproofing plate 13 is formed at the end thereof.
The horizontal bent portion 13b is supported via the vibration isolator 12a.

Example 7. Next, a low noise transformer according to the seventh embodiment will be described with reference to FIG. As shown in the figure, the back plate 14 which has been composed of a plurality of sheets is used as a single plate, and the vibration isolating member 12b is arranged inside the back plate 14 to slightly increase the installation area. Can be simplified.

Example 8. Next, a low noise transformer according to the eighth embodiment will be described with reference to FIG. As shown in the figure, by bending the lower end of the outer soundproofing plate 13 as well, the outer soundproofing plate 1
The rigidity of 3 can be improved.

Example 9. Next, a low noise transformer according to the ninth embodiment will be described with reference to FIG. As shown in the figure, the tank reinforcing members 11a and 11b are formed in a channel shape, which makes it possible to improve the strength of the tank and facilitate painting.

Example 10. In addition, in the above-mentioned embodiment, the sound absorbing effect can be enhanced by adding the sound absorbing material and the porous structure which are not attached according to the noise specification.

[0031]

As described above, in the stationary induction device according to the first aspect of the present invention, the tank direct mounting double wall structure soundproof plate has excellent sound insulation characteristics and the tank is directly mounted. It is possible to obtain a low-noise device that can move together with the soundproof plate. Further, since the soundproof plate is directly attached to the tank, there is an effect that the installation area can be made smaller than that of the separately installed soundproof plate.

Further, in the stationary induction device according to claim 2 of the present invention, since the sandwich steel plate in which the damping material is sandwiched between the two steel plates is used as the outer soundproof plate, the outer soundproof plate is Vibration can be prevented and the soundproofing effect can be further enhanced.

Further, in the stationary induction device according to the third aspect of the present invention, the sound absorbing effect can be further enhanced by using the sound absorbing material to prevent the sound pressure inside the sound insulating plate from rising.

In the static induction device according to claim 4 of the present invention, by using the porous structure, the sound pressure inside the soundproof plate is prevented from increasing and the sound insulating effect of the porous structure itself is enhanced. be able to.

Further, in the static induction device according to the fifth aspect of the present invention, since the porous structure is installed with the thermoplastic member interposed, the static induction device is bonded by the thermoplastic member as the temperature rises. As a result of the improved adhesion, it is possible to simplify the attachment structure of the porous structure, improve the attachment workability, and enhance the soundproof effect.

In the stationary induction device according to the sixth aspect of the present invention, by constructing the tank reinforcing member in the channel shape, the strength of the tank can be improved and the coating is facilitated.

In the stationary induction device according to the seventh aspect of the present invention, since the outer soundproof plate is attached so as to cover the entire tank side plate, the soundproof effect can be enhanced.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view a and an enlarged view b of a portion A showing a second embodiment of the present invention.

FIG. 3 is a partial sectional view showing a third embodiment of the present invention.

FIG. 4 is a partial sectional view showing Embodiment 4 of the present invention.

FIG. 5 is a partial cross-sectional view a showing Embodiment 5 of the present invention and enlarged views b and c of B and C parts thereof, respectively.

FIG. 6 is a partial sectional view showing Embodiment 6 of the present invention.

FIG. 7 is a partial cross-sectional view a and an enlarged view b of a portion D showing a sixth embodiment of the present invention.

FIG. 8 is a partial sectional view showing Embodiment 7 of the present invention.

FIG. 9 is a partial sectional view showing Embodiment 8 of the present invention.

FIG. 10 is a partial sectional view showing Embodiment 9 of the present invention.

FIG. 11 is a sectional view showing a conventional low noise transformer.

[Explanation of symbols]

3 tank, 3a tank side plate, 11a, 11b tank reinforcing member, 12a, 12b vibration damping member, 13 outer soundproof plate, 13a bent portion, 14 back plate, 15 support member,
16 steel plate, 17 damping material, 18 sound absorbing material, 19 porous structure, 20 thermoplastic member.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shinji Nakajima 8-1-1 Tsukaguchihonmachi, Amagasaki City Mitsubishi Electric Corporation Central Research Laboratory

Claims (7)

[Claims] 1. A stationary induction device installed in a tank, wherein a tank reinforcing member is attached to the side plate of the tank, and an outer soundproof plate is attached to the tank side member via a vibration isolating member. The upper end portion of the outer soundproof plate is bent at a right angle, the bent portion is placed on the upper portion of the tank reinforcing member via a vibration damping member, and a back plate is attached inside the outer soundproof plate with a space therebetween. A static induction device with a double wall soundproof structure. 2. The stationary induction device according to claim 1, wherein a sandwich steel plate in which a damping material is sandwiched between two steel plates is used as the outer soundproof plate. 3. A sound absorbing material is arranged between the outer soundproof plate and the back plate and between the back plate and the tank side plate.
The stationary induction device described. 4. The static induction device according to claim 1, wherein a porous structure is arranged between the outer soundproofing plate and the back plate and between the back plate and the tank side plate. 5. A porous structure is disposed between the outer soundproofing plate and the back plate and between the back plate and the tank side plate via a supporting member, and a thermoplastic member is interposed between the supporting member and the porous structure. The stationary induction device according to claim 4, wherein 6. The stationary induction device according to claim 1, wherein the tank reinforcing member has a channel shape. 7. A stationary induction device installed in a tank, wherein a tank reinforcing member is attached to a side plate of the tank, and an outer soundproof plate is covered with the tank reinforcing member via a vibration damping member so that the entire tank side plate is covered. In addition, the right-angled bent portion at the upper end of the tank side plate is attached to the overhanging piece of the tank upper wall via a vibration isolator, and the back plate is attached inside the outer soundproof plate with a space. Characteristic stationary induction equipment.