阅读说明：本技术 一种适用于电力电容器的隔声装置 (Sound insulation device suitable for power capacitor ) 是由 文卫兵 石岩 杨勇 李明 吴永利 周春红 王加龙 武炬臻 李琦 孔娟 吴秀荣 于 2019-10-31 设计创作，主要内容包括：本发明涉及一种适用于电力电容器的隔声装置,其特征在于,该隔声装置包括隔声挡板和调节机构,所述隔声挡板通过所述调节机构安装在电力电容器外部,且所述隔声挡板与所述电力电容器之间存在空隙间隔,通过所述调节机构使所述隔声挡板靠近或远离所述电力电容器以设置不同的所述空隙间隔,以达到最佳的降噪效果。(The invention relates to a sound insulation device suitable for a power capacitor, which is characterized by comprising a sound insulation baffle plate and an adjusting mechanism, wherein the sound insulation baffle plate is arranged outside the power capacitor through the adjusting mechanism, a gap interval exists between the sound insulation baffle plate and the power capacitor, and the sound insulation baffle plate is close to or far away from the power capacitor through the adjusting mechanism so as to set different gap intervals, so that the optimal noise reduction effect is achieved.)

1. The sound insulation device suitable for the power capacitor is characterized by comprising a sound insulation baffle (3) and an adjusting mechanism (4), wherein the sound insulation baffle (3) is installed outside the power capacitor through the adjusting mechanism (4), a gap interval exists between the sound insulation baffle (3) and the power capacitor, and the sound insulation baffle (3) is close to or far away from the power capacitor through the adjusting mechanism (4) so as to set different gap intervals.

2. The sound-insulating device according to claim 1, characterized in that the power capacitor comprises a shell (2), a core (5) and a sleeve (1), wherein the shell (2) is a hollow structure made of metal, and the inner space of the shell is filled with an insulating impregnant (6); the core (5) is mounted inside the casing (2) and immersed in the insulating impregnant (6); the sleeve (1) is arranged on the top of the shell (2) and is connected with the core (5).

3. A sound-insulating device according to claim 2, characterized in that the sound-insulating baffle (3) is mounted outside the large face of the housing (2) by means of the adjusting mechanism (4).

4. The sound-proof device according to claim 2, characterized in that the adjusting mechanism (4) comprises a screw rod (41), a nut (42) and a lifting tab (43), the lifting tab (43) is U-shaped, at least one pair of the lifting tabs (43) is symmetrically installed on both sides of the narrow face of the housing (2), the screw rod (41) is horizontally installed on the lifting tab (43), the sound-proof baffle (3) is installed on the screw rod (41) through the nut (42), and the gap interval between the sound-proof baffle (3) and the housing (2) is adjusted by screwing in or out the nut (42) to make the sound-proof baffle (3) approach or separate from the housing (2).

5. The sound insulation device according to claim 1, wherein the sound insulation baffle (3) is of a single-layer or double-layer structure made of a metal material with the thickness of 1-2 mm.

6. The sound-insulating device according to claim 5, characterized in that the sound-insulating baffle (3) of a double-layer structure comprises a flat outer metal plate (31) and a zigzag inner porous metal plate (32), the outer metal plate (31) and the inner porous metal plate (32) are welded by argon arc welding, and a gap of about 2mm is left between the outer metal plate (31) and the inner porous metal plate (32).

7. A sound-insulating device according to claim 1, characterized in that the sound-insulating baffle (3) is mounted on one or both sides of the power capacitor.

8. A sound-insulating device according to claim 2, characterized in that the gap spacing between the sound-insulating baffle (3) and the housing (4) is determined on the basis of noise harmonic currents of different frequencies, said gap spacing being in the range 5mm to 30 mm.

Technical Field

The invention relates to a sound insulation device, in particular to a power capacitor sound insulation device suitable for a direct-current transmission engineering converter station, and belongs to the technical field of noise control of high-voltage power capacitors.

Background

In a high-voltage direct-current transmission system, a large amount of harmonic waves are necessarily generated due to the rectifying and inverting processes, so that a large amount of filter capacitors need to be arranged. Due to the large amount of harmonic currents flowing into the capacitors, the capacitors generate a lot of noise when excited by the harmonic currents, whereby the filter capacitors have become a major noise source in the converter station. The noise of the capacitor is caused by the fact that the capacitor enables the pole plates of the capacitor to be subjected to the action of alternating electric field force to generate vibration under the action of the alternating electric field, and the vibration is transmitted to the shell through the structure connected with the pole plates and the capacitor impregnant, so that the vibration of the shell of the capacitor generates the noise and radiates the noise to the periphery.

According to the requirement of filtering different harmonics in direct current transmission engineering, filter capacitors with different structures, such as branch filter capacitors of BP11/13, HP12/24, HP3 and the like, can be designed, and characteristic harmonics flowing through the filter capacitors of different branches are different. Therefore, according to specific characteristic harmonic waves, the gap interval between the sound insulation baffle structure and the capacitor shell needs to be researched so as to achieve the optimal noise reduction effect.

Disclosure of Invention

In view of the above problems, the present invention provides a power capacitor sound insulation device suitable for a converter station in a dc power transmission project.

In order to achieve the purpose, the invention adopts the following technical scheme: a sound insulation device suitable for a power capacitor comprises a sound insulation baffle and an adjusting mechanism, wherein the sound insulation baffle is installed outside the power capacitor through the adjusting mechanism, a gap interval exists between the sound insulation baffle and the power capacitor, and the sound insulation baffle is close to or far away from the power capacitor through the adjusting mechanism so as to set different gap intervals.

Preferably, the sound insulation device comprises a shell, a core and a sleeve, wherein the shell is of a hollow structure made of metal materials, and an insulation impregnant is filled in the inner gap of the shell; the core is mounted in the housing and immersed in the insulation impregnant; the sleeve is disposed on top of the housing and is connected to the wick.

Preferably, the sound insulation baffle is mounted on the outer side of the large surface of the shell through the adjusting mechanism.

Preferably, the adjusting mechanism comprises a screw rod, a nut and a lifting tab, the lifting tab is U-shaped, at least one pair of the lifting tabs are symmetrically arranged on two sides of the narrow surface of the shell, the screw rod is horizontally arranged on the lifting tab, the sound insulation baffle is arranged on the screw rod through the nut, and the nut is screwed in or out to enable the sound insulation baffle to be close to or far away from the shell, so that the gap interval between the sound insulation baffle and the shell is adjusted.

Preferably, the sound insulation baffle is of a single-layer or double-layer structure made of metal materials with the thickness of 1 mm-2 mm.

The sound insulation device is preferably of a double-layer structure, the sound insulation baffle comprises a smooth outer metal plate and a sawtooth-shaped inner porous metal plate, the outer metal plate is welded with the inner porous metal plate through argon arc, and a gap of about 2mm is reserved between the outer metal plate and the inner porous metal plate.

The sound insulation device is preferably arranged on one side or two sides of the power capacitor.

Preferably, the gap interval between the sound insulation baffle and the shell is determined according to noise harmonic currents with different frequencies, and the range of the gap interval is 5 mm-30 mm.

Due to the adoption of the technical scheme, the invention has the following advantages: 1. the noise reduction device comprises the sound insulation baffle and the adjusting mechanism, wherein the sound insulation baffle is installed outside the power capacitor through the adjusting mechanism, a gap interval exists between the sound insulation baffle and the power capacitor, and different gap intervals are set through the adjusting mechanism according to noise currents with different frequencies so as to achieve the optimal noise reduction effect. 2. The sound insulation baffle plate with the single-layer or double-layer structure, which is made of metal materials, has the advantages of rust prevention, difficult deformation, excellent sound insulation performance and the like.

Drawings

FIG. 1 is a schematic view of a sound-insulating device according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of a power capacitor according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a sound-proof baffle according to an embodiment of the present invention.

In the drawings, the components represented by the respective reference numerals are listed below:

1 is a sleeve; 2 is a shell; 3 is a sound insulation baffle; 4 is an adjusting mechanism; 5 is a core; 6 is an impregnant; 31 is an outer layer metal plate 31; 32 is an inner porous metal plate; 41 is a screw rod; 42 is a nut; and 43 is a lifting flap.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present invention, but are merely intended to illustrate the spirit of the technical solution of the present invention.

Fig. 1 shows a sound insulation device suitable for a power capacitor provided by the invention, the sound insulation device comprises a sound insulation baffle plate 3 and an adjusting mechanism 4, the sound insulation baffle plate 3 is installed outside the power capacitor through the adjusting mechanism 4, a gap interval exists between the sound insulation baffle plate 3 and the power capacitor, and different gap intervals are set through the adjusting mechanism 4 according to noise currents with different frequencies.

In the above embodiment, preferably, as shown in fig. 1 and fig. 2, the power capacitor includes a housing 2, a core 5 and a sleeve 1, the housing 2 is a hollow structure made of metal material, and an inner space thereof is filled with an insulating impregnant 6; the core 5 is arranged in the shell 2 and is soaked in the insulating impregnant 6; the sleeve 1 is arranged on top of the housing 2 and is connected to the core 5.

In the above embodiment, it is preferable that the sound-proof baffle 3 is mounted outside the large face of the housing 2 by the adjusting mechanism 4.

In the above embodiment, it is preferable that the adjusting mechanism 4 includes a screw rod 41, a nut 42, and a hanger 43, the hanger 43 has a U shape, at least a pair of hangers 43 are symmetrically installed on both sides of the narrow surface of the housing 2, the screw rod 41 is horizontally installed on the hanger 43, the sound-proof baffle 3 is installed on the screw rod 41 through the nut 42, and the sound-proof baffle 3 is close to or far from the housing 2 by screwing in or out the nut 42, so as to adjust the gap interval between the sound-proof baffle 3 and the housing 2, thereby achieving the best noise reduction effect.

In the above embodiment, the sound insulation baffle 3 is preferably a single-layer or double-layer structure made of a metal material with a thickness of 1mm to 2 mm.

In the above embodiment, preferably, as shown in fig. 3, the sound-insulating baffle 3 with a double-layer structure includes the flat outer-layer metal plate 31 and the zigzag inner-layer porous metal plate 32, the outer-layer metal plate 31 and the inner-layer porous metal plate 32 are welded by argon arc, and a gap of about 2mm is left between the outer-layer metal plate 31 and the inner-layer porous metal plate 32.

In the above embodiment, it is preferable that the sound-proof baffle 3 is installed on both sides of the power capacitor, or only one side of the power capacitor as needed.

In the above embodiment, it is preferable that the gap interval between the sound-proof baffle 3 and the housing 4 is determined in accordance with the noise harmonic currents of different frequencies, and the gap interval is in the range of 5mm to 30 mm.

The above embodiments are only used for illustrating the present invention, and the structure, connection mode, manufacturing process, etc. of the components may be changed, and all equivalent changes and modifications performed on the basis of the technical solution of the present invention should not be excluded from the protection scope of the present invention.