TWI441207B - Ground induction electrical appliances - Google Patents

Description

Static induction appliance

The present invention relates to stationary induction appliances, and more particularly to stationary induction appliances having vibration insulation properties and noise reduction performance.

In recent years, based on the viewpoint of environmental protection, noise restrictions have become stricter, and the noise reduction of static induction appliances such as transformers has been highly anticipated. The noise of the static induction device is generated by the vibration of the body of the stationary induction device propagating to the sump, causing the side of the sump to vibrate to diverge the sound to the surroundings.

As a mechanism for preventing the spread of such a divergent sound, a method of accommodating a stationary induction electric appliance in a soundproof building made of an iron plate or the like is considered. Since the above method has a problem that the mounting footprint is increased, it is widely practiced to provide a countermeasure for directly providing a baffle around the sump. The baffle is a reducing effect when the sound penetrates the baffle, that is, the sound that is diverged from the side of the sump is reduced by the penetration loss. In the soundproofing countermeasure, the soundproofing plate itself is vibrated by the vibration of the side surface of the sump, and noise is not generated (see, for example, Patent Document 1).

Hereinafter, the soundproof measures described in Patent Document 1 will be specifically described with reference to Figs. 16 to 19 .

As shown in FIG. 16, the stationary induction electric appliance main body 1 is accommodated in the storage tank 2. The sump 2 is disposed on the foundation 6. The sump 2 is joined to the upper portion and the lower portion of the four sides by welding, and the sections are respectively joined in the horizontal direction. The upper portion of the upper reinforcement beam 16 ₁ and the lower reinforcement beam 16 ₂ .

The upper support point 17 is mounted on the upper end surface of the upper reinforcing beam 16 ₁ , and on the other hand, the lower support point 18 is mounted on the lower portion of the outer side 3 of the sump located below the lower reinforcing beam 16 ₂ , and at the upper support point 17 A baffle 5a is attached to the lower support point 18 so as to cover the outer side surface 3 of the sump. The baffle 5a includes a baffle body (insulation panel) 22, elastic members 23 and 24, and sealing materials 25 and 26.

As shown in Fig. 17, the baffle body 22 itself includes a rectangular flat plate 19, a frame-shaped reinforcing rib 20 attached to the periphery of the flat plate 19, and a cross-shaped reinforcing rib 21. The flat plate 19, the reinforcing ribs 20, and the reinforcing ribs 21 are joined by fusion bonding.

The elastic element 23 is disposed between the baffle body 22 and the upper support point 17, and the elastic element 24 is disposed between the baffle body 22 and the lower support point 18. The sealing materials 25 and 26 have flexibility and are provided with elastic members 23 and 24, thereby sealing the gap formed between the baffle body 22 and the outer side surface 3 of the sump.

In the prior art in which the soundproofing measures as described above are conceived, the sound insulating plate 5a has an effect of attenuating the sound which is diverged from the outer side surface 3 of the sump by the penetration loss. At the same time, in order to reduce the noise generated from the baffle 5a itself, the bending rigidity of the baffle body 22 is increased by the reinforcing ribs 20, 21, thereby preventing the flexural vibration of the baffle body 22, so that the elastic element 23 is included. And the vibration system of the baffle body 22 is close to the ideal one degree of freedom system. Therefore, since the vibration insulating effect by the elastic members 23 and 24 is improved, the vibration of the baffle body 22 is suppressed, so that the noise radiated by the baffle body 22 can be reduced.

Further, by providing the elastic members 23 and 24, a gap is formed between the baffle body 22 and the outer side surface 3 of the sump. However, by the soft sealing materials 25 and 26, the sound scattered from the outer side surface 3 of the sump can be prevented from leaking from the space inside the baffle plate 5a through the gap.

Further, by forming the baffle body 22 with the vibration-damping steel plate, the vibration-damping effect of the baffle plate can be improved. It is known that a vibration-damping steel sheet is integrally formed by sandwiching a polymer viscoelastic material between a plurality of steel sheets, and has a high attenuation capability against vibration.

Moreover, as shown in FIG. 18, it has been proposed to have three soundproof plates 5a attached to the outer side surface 3 of the tank. By using the plurality of divided baffles 5a in this manner, one baffle 5a can be miniaturized, which facilitates manufacturing and transportation.

Further, as shown in FIG. 19, it has been proposed to attach a sound absorbing material 14 including glass wool or the like to the inner wall of the sound insulating plate main body 22. By using the sound absorbing material 14 in this way, since the reflection of the sound caused by the standing wave 27 shown in the figure can be reduced and the noise level of the space inside the sound insulating plate 5a can be reduced, the noise penetrating the sound insulating plate body 22 can be further reduced, or worn. The noise leaking through the sealing materials 25 and 26 is.

[Advanced technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. Hei 10-149920

However, a static induction electric appliance using a baffle plate has the following problems as a soundproofing countermeasure as described above.

That is, in the prior art shown in Fig. 16, the baffle body 22 which is improved in bending rigidity by the reinforcing ribs 20 and 21 constitutes anti-vibration support with the elastic members 23 and 24, and is carried out from the outer side 3 of the sump. The vibration is brilliant. This corresponds to the vibration system of the elastic support continuum, and has the same property as the general one-degree-of-freedom system, and has a lower natural vibration number calculated from the mass and the spring constant, and a higher vibration insulation performance with respect to the input. Therefore, in order to optimize the vibration suppression, it is preferable to soften the elastic supports 23 and 24 and to lower the natural vibration number of the baffle 5a.

However, at the same time, the natural vibration number of the baffle 5a will be close to the frequency region of the maximum amplitude of the earthquake, and if the natural vibration number is set lower, the response of the baffle body 22 to the seismic input will increase, and it may cause The possibility of excessive vibration. If the vibration suppression is optimized in this way, the shock resistance of the baffle 5a is lowered.

Moreover, in the prior art shown in FIG. 18, if the number of the baffles 5a is increased, the support points 17 and the lower support points 18, the elastic elements 23, 24, and the sealing material 25 are provided on the outer side surface 3 of the sump. Parts such as 26 are also required to be added. Further, when a flange or a pipe is disposed on the outer side surface 3 of the sump, there is a case where the upper support point 17 and the lower support point 18 cannot be disposed at an optimum position, or a member having a complicated shape is required.

Furthermore, due to assembly errors, the positions of the baffle body 22, the upper support point 17, and the lower support point 18 may be offset from each other. Since the position and the interval of the gap are different for each of the baffles 5a, it is not easy. The gaps are mounted with sealing materials 25 and 26. Thus, if the number of the baffles 5a is increased, the number of fabrications will increase.

Further, in the prior art shown in Figs. 16 to 19, since the upper reinforcing beam 16 ₁ and the surface of the outer side surface 3 of the sump are attached to the entire length of the sump, the upper support point 17 and the lower support point 18 are mounted, and the support is supported there. The surface of the point is mounted on the baffle body 22 via the elastic elements 23, 24, so that the number of parts is large and the number of installations is expensive.

That is, it is difficult to specify the mounting range of the baffle 5a in accordance with the noise mode. Moreover, since the baffle body 22 is attached via the elastic members 23, 24, it is difficult to mount the weight supporting member on the surface of the baffle body 22, resulting in a complicated construction of the supporting member for mounting the weight supporting members.

In addition, in the case where a structure such as a cover, an oil pipe, or a manhole is provided in the vicinity of the sound insulating plate mounting position, there is a problem that the machine body cannot be miniaturized because a gap or the like cannot be provided in the sound insulating plate 5a.

Accordingly, the present invention has been made to solve the problems of the prior art as described above, and an object thereof is to provide a static induction electric appliance having a small number of fabrications and having high vibration insulation performance and noise reduction performance.

In order to achieve the above object, the static induction device of the first aspect of the present invention is characterized in that it comprises a storage tank for accommodating the body of the static induction device; and is formed in a downward direction or a lateral direction on the outer side surface of the storage tank with respect to the outer side surface of the storage tank. a sump reinforcing member fixed by a plurality of ribs; a sump reinforcing rib for joining the sump reinforcing members to each other; and a soundproofing for covering the space portion formed by the sump reinforcing member and the sump reinforcing rib by welding The sound insulating panel includes two or more soundproof plates facing each other, and is disposed so as to form a sealed space between the sound insulating plates, and the angle between the adjacent sides is inclined with respect to the angle of the regular polygon. Polygonal frame-shaped ribs installed above the degree.

According to the present invention, the opening portion of the concave space portion formed by arranging the plurality of sump reinforcing members in the vertical direction with respect to the outer side surface of the sump, or juxtaposed a plurality of sump reinforcing members facing the horizontal direction in the vertical direction, Since the sound insulating panel is attached by direct attachment welding, a sufficient vibration reducing effect can be obtained, and since the foundation for the sound insulating panel is not required, the mounting becomes easy, and the number of manufacturing work or the manufacturing cost can be reduced.

In addition, the sound-insulating panel can be freely changed in accordance with the vibration and noise modes, so that the most suitable structure and low-cost static induction electric appliance can be obtained in response to the noise mode.

Hereinafter, embodiments of the static induction device of the present invention will be described with reference to the drawings.

In the drawings, the same portions are denoted by the same reference numerals, and the description thereof will be omitted as appropriate.

[Embodiment 1]

Hereinafter, a stationary induction electric appliance according to the first embodiment will be described with reference to Figs. 1 to 5 .

1 is a perspective side view of the static induction device of the present embodiment, FIG. 2 is a front view of the arrow II direction of FIG. 1, and FIG. 3 is a plan view of the arrow III direction of FIG. 2, and FIG. 4 and FIG. 5 are respectively in the first embodiment. Front and side views of the soundproof panel used.

(constitution)

In Fig. 1 and Fig. 2, the stationary induction device according to the first embodiment is a body of a stationary induction device 1 including a core and a winding wire, and is sealed together with an insulating medium such as insulating oil or insulating gas in a storage tank formed into a horizontally long rectangular parallelepiped. 2 inside, and set on the base 6.

As shown in FIG. 2 and FIG. 3, a plurality of ribs are formed in the vertical direction with respect to the outer side surface 3 of the sump having a width wider than the four outer side faces 3 of the sump 2 (hereinafter referred to as the outer side surface 3 of the sump). In the way of juxtaposing a plurality of (4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ ) sections in a lateral direction in the vertical direction, or The sump reinforcing member 4 is fixed to the sump outer reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ by welding. As a result, the sill outer side surface 3 alternately forms the ridges formed by the sump reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ in the lateral direction, and the concave space portions 8 ₁ , 8 ₂ and 8 ₃ .

Further, the sump reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ are joined to each other, and the concave space 8 _{1 is} divided into three in the vertical direction, and the base 6 is substantially juxtaposed by welding or the like. 2 plate-shaped sump reinforcing ribs 7 ₁₁ and 7 ₁₂ , similarly, two sump reinforcing ribs 7 ₂₁ and 7 _{22 are} attached by welding equal to the concave space portion 8 ₂ , and the welding is equal to the concave space portion 8 ₃ Slot reinforcement ribs 7 ₃₁ and 7 ₃₂ .

The welded portion in this case is a portion where the three sides of the sump reinforcing rib 7 meet in the concave space portion 8, that is, both side faces of the sump reinforcing member 4 and the sump outer side surface 3 surrounded by the side. In addition, in FIG. 2, although the state in which two sump reinforcement ribs 7 are attached is shown in each recessed space part 8, the sump reinforcement rib 7 is not limited to two, and may be three or more (7 ₃ ... 7 _n ).

Thus, the "up-down direction of the ridge" of the reservoir is formed reinforcing member _{41, 42,} the vertical direction of the concave space portion ₄₃ is formed of _four and four _{81, 82,} reinforcing ribs ₈₃ mounted tank 7 Thereafter, the opening portion of the concave space portion 8 is covered with the sound insulating panel 5 having an appropriate thickness, and the sump reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ and the sump reinforcing rib 7 _{1 are} directly attached by welding. 7 ₂ . Install the peripheral portion of the soundproof panel 5.

As shown in FIG. 4 and FIG. 5, the sound insulating panel 5 includes a pair of opposite sound insulating plates 5a and a sound insulating plate 5b; and a four-side band shape formed between the sound insulating plates 5a and the sound insulating plates 5b to form a sealed space 9. Frame-shaped reinforcing ribs 5c formed by reinforcing ribs 5c ₁ , 5c ₂ , 5c _{3 ,} and 5c ₄ , and cross-shaped reinforcing ribs 5 d disposed inside the frame-shaped reinforcing ribs 5 c.

Further, the pair of baffles 5a and 5b, the frame-shaped reinforcing ribs 5c, and the cross-shaped reinforcing ribs 5d are all made of an iron plate, and the respective contact portions are fixed by welding. Since the pair of baffles 5a and baffles 5b are welded by the cross-shaped reinforcing ribs 5d, vibration can be suppressed. Further, since the production of the soundproof panel 5 is usually performed in the atmosphere, air is introduced into the sealed space 9.

As shown in FIG. 3, the sound insulating panel 5 thus produced is attached so that only the sound insulating plate 5b remains, and the frame reinforcing rib 5c and the sound insulating plate 5a are hidden in the concave space portion 8, so that the sound insulating plate 5a is longitudinally The lateral dimension is selected to be smaller than the baffle 5b by a portion corresponding to the welded portion.

Further, the polygonal frame-shaped reinforcing rib 5c sandwiched by the baffle 5a and the baffle 5b is a pair of side edges of the four side band-shaped reinforcing ribs 5c ₁ , 5c ₂ , 5c ₃ , and 5c ₄ (5c ₁ and 5c) ₃ , 5c ₂ and 5c ₄ ) The mounting angles of the adjacent sides in the non-parallel state (the angle between the adjacent sides) are assembled so as to be inclined by 4 degrees or more with respect to the case of the regular polygon. In the introductory remarks of FIG. 4, the reinforcing rib 5c ₁ and 5c ₂ Room attachment angle of θ _1, 5c ₁ and the reinforcing rib attachment angle [theta] of more than 5C Room _{4 4} 4 degrees less than 90 °, opposite the reinforcing ribs 5c ₂ and the installation angle of 5c ₃ Room θ _2, the reinforcing rib 5c ₃ Room ₄ and 5C mounting angle of θ ₃ 90 ° or more than 4 degrees large. Therefore, the reinforcing ribs 5c ₁ and 5c ₃ and the reinforcing ribs 5c ₂ and 5c _{4 are in} a non-parallel relationship.

In addition, in FIG. 4, the frame-shaped reinforcing rib 5c is a square shape, and it is comprised by the four side reinforcement rib. However, when the frame of a octagonal shape or more is used, it is comprised by the reinforcement ribs of five sides or more.

(effect)

Thus, the sump reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 _{4 which} are attached to the outer side surface 3 of the sump for forming a plurality of ridges in the lateral direction are overlapped with the sump reinforcing ribs 7 ₁ , 7 ₂ ... 7 _n The sound insulating panel 5 formed in the concave space portion 8 of the outer side surface 3 of the sump can freely change the number of mounting blocks or the mounting range according to the vibration and noise mode of the stationary induction device.

Moreover, since the soundproof panel 5 is composed of an iron plate, it is relatively inexpensive, and is covered by the sump reinforcing members 4 ₁ , 4 ₂ , 4 ₃ and 4 ₄ and the sump reinforcing rib 7 ₁ by direct attachment welding. 8 embodiment the surface of the concave space portion ₇₂ surrounded by the mounting insulation panel 5, so that the mounting operation is easy.

Moreover, since the sound insulating panel 5 is firmly attached to the outer side surface 3 of the sump by welding, the weight supporting member such as the oil storage tank, the radiator gantry, and the casing cover can be directly attached to the surface of the sound insulating panel 5, thereby making it possible to The construction of the support member is simplified. In addition, when it is necessary to provide a structure such as a cover or an oil pipe in the vicinity of the attachment position of the soundproof panel 5, a notch can be provided in advance in the soundproof panel 5 before the soundproof panel 5 is attached, and the structure can be easily provided. .

Further, since the two baffles 5a and the baffles 5b facing each other form a sealed space, the sound insulating performance of the sound penetrating the baffle panel 5 can be improved. In the case where the sound insulating panel 5 is formed so as to face the two sound insulating plates 5a and 5b in a sealed space, a sound insulating plate having a thickness equal to the thickness of the two plates can be obtained (that is, the soundproofing of the same quality) Board) higher sound insulation. The reason for this is that the intermediate layer formed between the two baffles 5a and 5b can effectively use the medium which is the resistance when the acoustic energy is input to the baffle panel 5 (that is, the difference in impedance between the baffles 5).

Further, since the attachment angles of the four side reinforcing ribs 5c ₁ , 5c ₂ , 5c _{3 ,} and 5c ₄ constituting the frame-shaped reinforcing rib 5c are inclined by 4 degrees or more with respect to the case of the regular square shape, it is prevented in the sealed space 9 The resonance of the sound. In the case of noise generated by stationary induction appliances, the usual problem is noise from 100 Hz to 500 Hz with a half wavelength of 340 mm to 1700 mm.

The resonance of the sound occurs in an integer multiple of the half wavelength of the sound considered to be problematic, and is substantially equal to the respective dimensions of the sealed space 9. In the case where the sound is resonated in the sealed space 9, the sound attenuated by the sound insulating panel 5 can be amplified again, and the sound insulating performance is lowered. Further, since the cross-shaped reinforcing ribs 5d are welded to the surfaces of the sound insulating plates 5a and 5b in the sealed space 9 formed between the opposing sound insulating plates 5a and the sound insulating plates 5b, the vibration reducing effect on the surface of the sound insulating panel 5 can be obtained. Both sound insulation performance. Here, the frame-shaped reinforcing rib is a polygonal shape, and the cross-shaped reinforcing rib includes: a first reinforcing rib provided in a manner from a point of one side of the frame-shaped reinforcing rib to a facing edge or an apex; The second reinforcing rib provided in the vicinity of the midpoint of the first reinforcing rib so as to intersect with it. Further, both the first reinforcing rib and the second reinforcing rib are attached so as not to be parallel with any one of the frame-shaped reinforcing ribs.

(effect)

As described above, according to the first embodiment, since a plurality of sump reinforcing members are juxtaposed and fixed to the lateral direction of the sump outer side surface 3, and the sump reinforcing ribs are joined to each other, the sump reinforcing members are joined to each other and directly attached by welding. The sound insulating panel is attached to the opening of the space portion including the side surface of the sump, the sump reinforcing member, and the sump reinforcing rib, so that a sufficient vibration reducing effect can be obtained, and since the base for mounting the sound insulating panel is not required, the mounting work becomes It is easy, so it can reduce the number of productions or production costs.

In addition, the sound-insulating panel can freely change the mounting range according to the mode of vibration and noise, thereby obtaining the most suitable structure and low-cost static induction electric appliance according to the noise mode.

Further, since the sound insulating panel is attached to the sump reinforcing member by direct welding to cover the concave space portion formed between the sump reinforcing members, a heavy object (storage tank, heat sink) can be attached to the surface of the sound insulating panel. The gantry, the casing cover, etc.), as a result, the machine can be miniaturized.

Further, since the mounting angle of the reinforcing ribs of the respective sides of the frame-shaped reinforcing ribs constituting the polygonal shape is inclined by 4 degrees or more with respect to the case of the regular polygonal shape, the resonance of the sound in the sealed space can be reduced to no It will become a practical problem to further improve the sound insulation performance, thereby providing a static induction electric appliance with low production cost and low cost, and vibration reduction effect and high sound insulation effect.

[Embodiment 2]

Hereinafter, a stationary induction electric appliance according to the second embodiment will be described with reference to Fig. 6 .

Fig. 6 is a perspective side view of the sound insulating panel 5 used in the second embodiment.

As shown in Fig. 6, the sound insulating panel 5 used in the second embodiment is in a vacuum state in a sealed space 9 formed between the pair of the sound insulating plates 5a and the sound insulating plates 5b and the frame reinforcing ribs 5c. By. The shape of the frame-shaped reinforcing rib 5c itself is the same as that of Fig. 4 of the first embodiment.

By keeping the inside of the sealed space 9 of the sound insulating panel 5 in a vacuum state, the propagation of sound in the sealed space 9 is eliminated, and the penetration loss is increased, so that the sound insulating effect can be expected to be further improved as compared with the first embodiment.

As described above, according to the second embodiment, it is possible to suppress the propagation of sound in the sealed space by keeping the inside of the sealed space 9 in a vacuum, thereby providing a static induction electric appliance having a higher sound insulation effect.

[Embodiment 3]

Hereinafter, a stationary induction electric appliance according to the third embodiment will be described with reference to Fig. 7 .

Fig. 7 is a perspective side view of the sound insulating panel 5 used in the third embodiment.

As shown in Fig. 7, the sound insulating panel 5 used in the third embodiment is in a vacuum state in a sealed space 9 formed between the pair of the sound insulating plates 5a and the sound insulating plates 5b and the frame reinforcing ribs 5c. The vacuum valve 10 is attached to the outer surface of the sound insulating plate 5b constituting the sealed space 9.

Since the degree of vacuum in the sealed space 9 of the sound insulating panel 5 is lowered after the long-term operation of the stationary induction device, the sound insulating performance is lowered. Therefore, in the third embodiment, the vacuum can be communicated with the sealed space 9 of the sound insulating panel 5. A pressure gauge (not shown) is attached to the valve 10, and the pressure in the sealed space 9 is confirmed by the pressure gauge. When the degree of vacuum is lowered, the vacuum pump is connected to the vacuum valve 10, so that the sealed space 9 is kept in good condition again. Vacuum state.

As described above, according to the third embodiment, the vacuum valve can be attached to the surface of the sound insulating panel to maintain the vacuum in the sealed space of the sound insulating panel after the sound insulating panel is mounted, thereby providing a high quality and high reliability for a long period of time. Static induction appliances for sound insulation.

[Embodiment 4]

Hereinafter, a stationary induction electric appliance according to the fourth embodiment will be described with reference to Fig. 8 .

Fig. 8 is a perspective side view of the sound insulating panel 5 employed in the present embodiment.

As shown in Fig. 8, the sound insulating panel 5 used in the fourth embodiment is in a vacuum state in a sealed space 9 formed between the pair of the sound insulating plates 5a and the sound insulating plates 5b and the frame reinforcing ribs 5c. The vacuum check valve 11 that communicates with the sealed space 9 is attached to the outer surface of the sound insulating plate 5b constituting the sealed space 9.

In this way, by installing the vacuum check valve 11 on the surface of the sound insulating panel 5, the sealed space in the sound insulating plate can be easily kept in a vacuum, and since the mounting area can be suppressed compared with the vacuum valve, the soundproofing can be performed. The surface of the board simplifies the support structure of the heavy objects (storage tank, radiator rack, casing cover, etc.) and reduces the manufacturing cost.

As described above, according to the fourth embodiment, since the vacuum check valve 11 is attached to the surface of the baffle plate 5b, the space on the surface of the baffle plate can be effectively utilized, and the valve for vacuum can be used at a lower cost, thereby providing a manufacturing cost. The static induction electric appliance with the advantages of reduction, miniaturization of the machine and excellent sound insulation performance.

[Embodiment 5]

Hereinafter, a static induction electric appliance according to the fifth embodiment will be described with reference to Fig. 9 .

Figure 9 is a perspective side view of the sound insulating panel used in the present embodiment.

As shown in Fig. 9, the sound insulating panel 5 used in the fifth embodiment is in a vacuum state in a sealed space 9 formed between the pair of the sound insulating plates 5a and the sound insulating plates 5b and the frame reinforcing ribs 5c. The vacuum piping 12 that communicates with the sealed space 9 is attached to the outer surface of the sound insulating plate 5b constituting the sealed space 9, and the sound insulating panel 5 is connected to the vacuum piping 12, as shown in Figs. 10 and 11 . link.

As described above, according to the fifth embodiment, the vacuum pipe 5 can be attached to the surface of the sound insulating plate 5b, and the vacuum operation can be performed once in the sealed space 9 of the plurality of sound insulating panels, thereby providing a static induction which is easy to perform vacuum work. Electrical appliances.

[Embodiment 6]

Hereinafter, a stationary induction electric appliance according to the sixth embodiment will be described with reference to Figs. 12 and 13 . Fig. 12 is a front view of the sound insulating panel of the sixth embodiment, and Fig. 13 is a side view.

In the sound insulating panel 5 used in the sixth embodiment, the sound insulating panel 5 shown in Fig. 4 is used as a base, and the sandwich type vibration damping plate 13 is attached to the sealed space 9.

In other words, as shown in FIG. 12 and FIG. 13, an inner layer of the sound insulating plate 5b on the surface side of the sound insulating panel 5 is provided with a sandwich layer made of a combination of aluminum and a layer of adhesive having the properties of both rubber and clay. Shape damping plate 13.

In this way, the sandwich-shaped damper plate 13 formed by combining the aluminum plate and the adhesive layer is mounted on the inner surface of the baffle plate 5b. Since the deflection of the two steel plates is retarded when the vibration is transmitted, the viscous portion is located therebetween. The elastic resin generates a shearing force, and the vibration energy is absorbed to be changed into heat energy, and the radiation of the sound caused by the vibration of the surface of the sound insulating panel 5 is reduced.

As described above, according to the sixth embodiment, the sandwich-shaped damper plate 13 in which the aluminum plate and the adhesive layer are combined is attached to the inner surface of the baffle plate 5b on the front side, thereby enhancing the vibration reducing effect on the surface of the baffle of the baffle panel 5. Therefore, the sound insulation performance of the sound insulating panel 5 is greatly improved, and since the sandwich type vibration damping plate 13 can be obtained at a very low price, it is possible to provide a static induction electric appliance which is low in cost and excellent in sound insulation performance.

[Embodiment 7]

Hereinafter, a static induction electric appliance according to the seventh embodiment will be described with reference to Fig. 14 .

Figure 14 is a perspective side view of the sound insulating panel used in the seventh embodiment.

As shown in FIG. 14, the sound insulating panel 5 of the seventh embodiment is filled with a sound absorbing material 14 in a sealed space 9 formed by facing the pair of the sound insulating plate 5a, the sound insulating plate 5b, and the frame reinforcing rib 5c. Further, the sound of the sound absorbing material 14 entering the sealed space 9 is absorbed in the sound absorbing material 14 without being penetrated by the sound insulating plate 5b.

As described above, according to the seventh embodiment, since the sound absorbing material 14 is filled in the sealed space 9 of the sound insulating panel, the sound entering the sealed space 9 is absorbed in the sound absorbing material 14 so that the sound is not worn. through. The sound absorbing material 14 itself is inexpensive, easy to obtain, has a long life, and is not used in a place to be used, and thus can provide a static induction electric appliance with a reduced number of productions and a high sound insulation effect.

[Embodiment 8]

Hereinafter, a stationary induction device according to the eighth embodiment will be described with reference to Fig. 15 .

Figure 15 is a perspective side view of the sound insulating panel used in the present embodiment.

As shown in Fig. 15, the sound insulating panel 5 used in the eighth embodiment is filled with a liquid 15 in a sealed space 9 formed by facing the pair of the sound insulating plate 5a, the sound insulating plate 5b, and the frame reinforcing rib 5c. .

As shown in the first embodiment, the sound insulating panel 5 of the eighth embodiment has a larger attenuation of sound than a gas (air) enclosed in the sealed space 9. Moreover, there is a sound source with a large audio output in the liquid, and even if a sound having a high level is present, since the difference between the inherent acoustic resistance of the air and the liquid is large, the sound is almost completely reflected at the contact surface thereof, and is hardly directed to the air. It is emitted in the middle, so it will not become a loud noise level that makes people who are in the air bored.

As described above, according to the eighth embodiment, in the case where the liquid enclosed in the sealed space 9 of the sound insulating panel 5 has sound propagation in a substance having a relatively large density, the liquid vibration requires a larger energy than the gas, and the sound is sounded. The attenuation is larger than in the air, thus providing a static induction appliance with higher sound insulation.

[Modification]

Further, in the above description, the sump reinforcing members 4, 4 ₁ to 4 _{4 are} set in the vertical direction, and the sump reinforcing ribs 7 and 7 ₁₁ to 7 _{32 are} set in the lateral direction, but the positional relationship between the two may be reversed. The sump reinforcing members 4, 4 ₁ to 4 _{4 are} set in the lateral direction, and the sump reinforcing ribs 7 and 7 ₁₁ to 7 _{32 are} set in the vertical direction.

1. . . Static induction appliance body

2. . . Storage tank

3. . . Slot side

4, 4 ₁ ~ 4 ₄ . . . Slot reinforcement member

5. . . Soundproof panel

5a. . . Acoustic panels

5b. . . Acoustic panels

5c. . . Frame stiffener

5d. . . Cross stiffener

6. . . basis

7, 7 ₁₁ ~ 7 ₃₂ . . . Slot reinforcement rib

8. . . Concave space

9. . . hermetic space

10. . . Vacuum valve

11. . . Vacuum check valve

12. . . Vacuum piping

13. . . Sandwich damper

14. . . Sound absorbing material

15. . . liquid

1 is a perspective side view showing Embodiment 1 of a static induction device of the present invention;

Figure 2 is a front view of Figure 1 taken in the direction of arrow II;

Figure 3 is a plan view of Figure 2 taken in the direction of arrow III;

Figure 4 is a front elevational view of the sound insulating panel used in Embodiment 1;

Figure 5 is a perspective side view of the baffle shown in Figure 4;

Figure 6 is a perspective side view of the soundproof panel of Embodiment 2 of the static induction device of the present invention;

Figure 7 is a perspective side view of the soundproof panel of Embodiment 3 of the static induction device of the present invention;

Figure 8 is a perspective side view of the soundproof panel of Embodiment 4 of the static induction device of the present invention;

Figure 9 is a perspective side view of the sound insulating panel of Embodiment 5 of the static induction device of the present invention;

Figure 10 is a plan view showing a static induction device of Embodiment 5;

Figure 11 is a side view of the static induction device of Embodiment 5;

Figure 12 is a front elevational view of the sound insulating panel used in Embodiment 6 of the static induction electrical apparatus of the present invention;

Figure 13 is a perspective side view of the sound insulating panel shown in Figure 12;

Figure 14 is a perspective side view of the sound insulating panel used in Embodiment 7 of the static induction device of the present invention;

Figure 15 is a perspective side view of a sound insulating panel used in Embodiment 8 of the static induction electrical apparatus of the present invention;

Figure 16 is a side view showing an example of a prior stationary induction device;

Figure 17 is a front elevational view showing an example of the sound insulating plate body used in Figure 16;

Figure 18 is a front elevational view showing another example of the prior stationary induction appliance; and

Fig. 19 is a perspective side view showing still another example of the prior stationary induction device.

1. . . Static induction appliance body

2. . . Storage tank

3. . . Slot side

4. . . Slot reinforcement member

5. . . Soundproof panel

6. . . basis

Claims (10)

A static induction device characterized in that it comprises: a storage tank for accommodating the body of the static induction device; and a storage tank fixed by means of forming a plurality of ridges in a downward direction or a lateral direction on the outer side surface of the storage tank a sump reinforcing rib that joins the sump reinforcing members to each other; and a sound insulating panel that is attached to cover the space formed by the sump reinforcing member and the sump reinforcing rib by welding; and the sound insulating panel includes a facing The two or more soundproof panels are arranged in a polygonal frame shape so as to be disposed so as to form a sealed space between the soundproof plates, and the angle between the adjacent sides is inclined by 4 degrees or more with respect to the angle of the regular polygon. Strengthen the ribs. The static induction device of claim 1, wherein the sound insulating panel is provided in the sealed space formed by two or more of the opposite soundproof plates and the frame-shaped reinforcing ribs, and is provided to be coupled to the sound insulating plate to prevent vibration of the sound insulating plate. Cross-shaped reinforcing ribs. The stationary induction device of claim 2, wherein the cross-shaped reinforcing rib includes a first reinforcing rib provided from a point from one side of the frame-shaped reinforcing rib to an opposite side or an apex, and the first reinforcing rib The second reinforcing rib provided in the vicinity of the midpoint of the reinforcing rib so as to intersect with each other, and the first reinforcing rib and the second reinforcing rib are attached so as not to be parallel with any one of the frame reinforcing ribs. The stationary induction device of claim 1, wherein the sound insulating panel is in a vacuum state by the sealed space formed by two or more of the baffles and the frame-shaped reinforcing ribs facing each other. The static induction device according to claim 4, wherein the sound insulating panel is in a vacuum state in the sealed space formed by two or more of the sound insulating plates and the frame reinforcing ribs facing each other, and a vacuum valve is attached to the outer surface of the sound insulating plate. . The static induction device of claim 4, wherein the sound-insulating panel is in a vacuum state in the sealed space formed by the two or more sound-insulating plates and the frame-shaped reinforcing ribs, and a vacuum is applied to the outer surface of the sound-insulating plate. Check valve. The static induction device of claim 4, wherein the sound-insulating panel is in a vacuum state in the sealed space formed by two or more opposing sound-insulating panels and frame-shaped reinforcing ribs, and is outside the sound-insulating panel constituting the sealed space. A pipe for vacuum mounting is provided on the surface, and the sealed space of the plurality of soundproof panels is connected by piping. The static induction device of claim 1 or 2, wherein any one of the opposite soundproof plates constituting the sound insulating panel is provided with an aluminum restraint plate and a sandwich layer having an adhesive layer having both rubber and clay properties. Damping plate. A stationary induction appliance according to claim 1 or 2, wherein said sound insulating panel is filled with a sound absorbing material in said sealed space formed by two or more opposing sound insulating plates and frame-shaped reinforcing ribs. The stationary induction appliance of claim 1, wherein the sound insulating panel is filled with a liquid in the sealed space formed by two or more opposing sound insulating plates and frame-shaped reinforcing ribs.