CN214588454U

CN214588454U - Noise reduction and sound insulation device of power capacitor

Info

Publication number: CN214588454U
Application number: CN202120853221.9U
Authority: CN
Inventors: 金鼎峰; 田亦农; 刘海; 李天胜; 刘金南; 殷朴夫
Original assignee: Taizhou Dijing Electric Technology Co ltd; Zhejiang Greenwald Power Electronics Co ltd
Current assignee: Taizhou Dijing Electric Technology Co ltd; Zhejiang Greenwald Power Electronics Co ltd
Priority date: 2021-04-23
Filing date: 2021-04-23
Publication date: 2021-11-02
Anticipated expiration: 2031-04-23

Abstract

The utility model discloses a noise reduction and sound insulation device of power capacitor relates to power capacitor technical field. The power capacitor comprises a base and a cylinder body with an opening at the lower end, wherein the lower end of the cylinder body is covered on the base to form a closed space for placing a power capacitor; the top of the cylinder body is provided with two through holes for the conductive columns of the power capacitor to pass through, the peripheral side wall and the top of the cylinder body are of a double-layer structure, and the double-layer structure comprises an inner layer and an outer layer and is enclosed into a sound insulation cavity communicated with each other; a first silencing hole which is horizontally arranged is formed in the inner layer and is communicated with the sound insulation cavity and the closed space; the sound insulation cavity is internally provided with a sound insulation board which is spiral from bottom to top, and the sound insulation board is provided with a second sound deadening hole which is vertically arranged. The utility model discloses from the angle of eliminating the sound wave, weaken the noise that power capacitor sent, reach excellent syllable-dividing effect.

Description

Noise reduction and sound insulation device of power capacitor

Technical Field

The utility model relates to a condenser technical field especially relates to a noise insulation of making an uproar falls in power capacitor.

Background

In the whole high-voltage and extra-high-voltage transmission system, the converter station is an important link, and the power capacitor is an important component of the converter station. The test result of the power capacitor noise test shows that: the radiation noise of a single power capacitor under the simulated working condition can reach more than 60dB (A), and the radiation noise of all power capacitors in the whole converter station which are superposed together can reach more than 90dB (A). Since environmental issues caused by noise are receiving more and more attention, how to effectively reduce the noise level of power capacitors has become an urgent engineering problem to be solved.

Noise is generated because the elements of the power capacitor vibrate under the action of current, and some existing solutions are to reduce noise based on how to reduce the vibration of the elements. However, in the working environment, the vibration of the element is unavoidable, so that the noise reduction effect of this solution is extremely limited.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a noise insulation of making an uproar falls in power capacitor, from the angle of eliminating the sound wave, weakens the noise that power capacitor sent, reaches excellent syllable-dividing effect.

In order to achieve the above object, the utility model provides a following technical scheme:

a noise reduction and sound insulation device for a power capacitor comprises a base and a cylinder body with an opening at the lower end, wherein the lower end of the cylinder body is covered on the base to form a closed space for placing the power capacitor; the top of the cylinder body is provided with two through holes for the conductive columns of the power capacitor to pass through, the peripheral side wall and the top of the cylinder body are of a double-layer structure, and the double-layer structure comprises an inner layer and an outer layer and is enclosed into a sound insulation cavity communicated with each other; a first silencing hole which is horizontally arranged is formed in the inner layer and is communicated with the sound insulation cavity and the closed space; the sound insulation cavity is internally provided with a sound insulation board which is spiral from bottom to top, and the sound insulation board is provided with a second sound deadening hole which is vertically arranged.

Furthermore, a rubber ring is arranged in the through hole, and the rubber ring is connected with the through hole through an elastic sealing material.

Furthermore, a storage table for placing the power capacitor is arranged in the closed space, and the storage table is driven to lift through a lifting mechanism.

Furthermore, elevating system is including seting up the screw hole of base and being fixed in the double-screw bolt of putting thing platform bottom, the double-screw bolt is connected through screw-thread fit with the screw hole, the position that the terminal of double-screw bolt stretches out the base is provided with the knob.

Furthermore, the lower terminal surface of base is provided with ascending recess.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model is provided with a sound insulation cavity and a first silencing hole for preliminary silencing; further set up acoustic celotex board and second bloop in the soundproof cavity, reach the effect of further amortization. In addition, the first silencing hole and the second silencing hole are perpendicular to each other, the propagation direction of sound waves is changed for multiple times, the sound waves are gradually weakened in the process of being touched with the inner wall of the sound insulation cavity and the sound insulation board, and finally a good sound insulation effect is achieved.

Drawings

Fig. 1 is a sectional view of an embodiment of the present invention.

Fig. 2 is a schematic view of an outer layer removing structure according to an embodiment of the present invention.

Fig. 3 is a half sectional view of the utility model in use.

Fig. 4 is a sectional view of the usage state of the present invention.

Fig. 5 is a partially enlarged view of a portion a of fig. 4.

In the figure: 1. a base; 11. a groove; 12. a threaded hole; 2. a barrel; 21. an inner layer; 22. an outer layer; 23. a sound insulation cavity; 24. a first muffling hole; 25. a sound insulating board; 26. a second muffling hole; 3. a through hole; 31. a rubber ring; 32. an elastic sealing material; 4. a closed space; 5. a placing table; 51. a stud; 52. A knob.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 3, the present embodiment provides a noise reduction and sound insulation device for a power capacitor, which includes a base 1 and a cylinder 2 with an opening at a lower end, wherein the lower end of the cylinder 2 is covered on the base 1 to form a closed space 4 for placing a power capacitor 6.

Two through-holes 3 that are used for electric power capacitor 6 to lead electrical pillar 61 to pass are seted up at the top of barrel 2, the week lateral wall and the top of barrel 2 are bilayer structure, bilayer structure includes inlayer 21 and skin 22, encloses the syllable-dividing cavity 23 that establishes to be linked together. In order to achieve a better noise reduction effect, the inner layer 21 is provided with a first noise reduction hole 24 which is horizontally arranged and is communicated with the sound insulation cavity 23 and the closed space 4. Referring to fig. 1 and 2, in order to improve the sound attenuation effect, in this embodiment, a sound insulation plate 25 is further disposed in the sound insulation cavity 23, the sound insulation plate 25 is spiral from bottom to top, and partitions the annular sound insulation cavity 23 into a spiral passage to limit the circulation direction of sound waves, and a second sound attenuation hole 26 is vertically disposed on the sound insulation plate 25. The first sound-deadening holes 24 and the second sound-deadening holes 26 are perpendicular to each other, the propagation direction of sound waves is changed for many times, the sound waves are gradually weakened in the process of contacting with the inner wall of the sound-insulating cavity and the sound-insulating plate, and finally a good sound-insulating effect is achieved.

Referring to fig. 4 and 5, in the power capacitors with different sizes, the sizes and the intervals of the conductive pillars 61 are different. In order to adapt to power capacitors with different sizes, a rubber ring 31 is arranged in the through hole 3, and the rubber ring 31 is connected with the through hole 32 through an elastic sealing material 32. On one hand, the rubber ring 31 has elasticity, so that the conductive column 61 with various thicknesses can be adapted, and the rubber ring 31 is tightly contacted with the outer peripheral side of the conductive column 61, so that noise is prevented from being directly transmitted to the outside. On the other hand, the elastic sealing material 32 seals the rubber ring 31 and the inner wall of the through hole 3 to prevent sound from penetrating through the gap between the two, and the elastic sealing material 32 has elasticity to allow the two rubber rings 31 to move relatively to a certain extent, so that sealing can be achieved even when the distance between the two conductive posts 61 is changed. Preferably, the elastic sealing material 32 is rubber.

Similarly, the heights of the power capacitors 6 with different dimensions are different. In order to adapt to the heights of capacitors with different specifications, a storage table 5 for storing a power capacitor 6 is arranged in the closed space 4, and the storage table is driven to lift through a lifting mechanism. The lifting mechanism comprises a threaded hole 12 formed in the base 1 and a stud 51 fixed at the bottom of the object placing table 5, and the stud 51 is connected with the threaded hole 12 in a threaded fit mode. Through the adjustment of screw thread, can set up the relative height of putting thing platform 5 and base 1, further strengthened the high adaptation of power capacitor 1. For the convenience of adjustment, a knob 52 is arranged at the position of the tail end of the stud 51 extending out of the lower end face of the base 1.

Referring to fig. 1, it is worth mentioning that the upper surface of the object placing table 5 is provided with a shock absorbing pad 53 to eliminate the vibration generated by the power capacitor 6 during operation, so as to further eliminate the noise.

The knob 52 and the stud 51 extend out of the lower end face of the base 1, so that the device cannot be laid flat, and therefore, in the embodiment, an upward groove 11 is formed in the lower end face of the base 1 to accommodate the end of the stud 51 and the knob 52.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A noise reduction and sound insulation device for a power capacitor comprises a base and a cylinder body with an opening at the lower end, wherein the lower end of the cylinder body is covered on the base to form a closed space for placing the power capacitor; the power capacitor is characterized in that the peripheral side wall and the top of the cylinder body are of a double-layer structure, and the double-layer structure comprises an inner layer and an outer layer which are surrounded to form a communicated sound insulation cavity; a first silencing hole which is horizontally arranged is formed in the inner layer and is communicated with the sound insulation cavity and the closed space; the sound insulation cavity is internally provided with a sound insulation board which is spiral from bottom to top, and the sound insulation board is provided with a second sound deadening hole which is vertically arranged.

2. A noise reduction and sound insulation device for a power capacitor as claimed in claim 1, wherein a rubber ring is arranged in the through hole, and the rubber ring is connected with the through hole through an elastic sealing material.

3. A noise reduction and sound insulation device for a power capacitor as claimed in claim 1, wherein a platform for placing the power capacitor is disposed in the enclosed space, and the platform is driven to move up and down by a lifting mechanism.

4. The noise reduction and sound insulation device for the power capacitor as claimed in claim 3, wherein the lifting mechanism comprises a threaded hole formed in the base and a stud fixed to the bottom of the object placing table, the stud is connected with the threaded hole in a threaded fit manner, and a knob is arranged at a position where the tail end of the stud extends out of the base.

5. A power capacitor noise reduction and sound insulation device according to claim 4, wherein the lower end surface of the base is provided with an upward groove.