Power capacitor with noise reduction device

Abstract

The utility model discloses a power capacitor with a noise reduction device, and belongs to the field of power capacitors, and the key points of the technical scheme are that the power capacitor comprises a power capacitor housing, and also comprises a metal housing which is installed on the power capacitor housing; the damping material is arranged in an interlayer between the metal shell and the power capacitor shell; wherein the metal shell comprises an installation sleeve and an installation cover, the installation sleeve is installed on a shell of the power capacitor, the installation cover is installed on the installation sleeve, the noise reduction device on the power capacitor can be conveniently disassembled, and an operator can conveniently overhaul the power capacitor.

Description

Technical Field

[0001] This application belongs to the field of power capacitors, and particularly relates to a power capacitor with a noise reduction device. Background Technology

[0002] With the increasing number of ultra-high voltage (UHV) and extra-high voltage (UHV) direct current (DC) transmission projects, a large number of harmonics are generated during the AC-DC conversion process in these systems. When harmonic currents pass through AC parallel capacitors and DC filter capacitors, the dielectric material inside the capacitor cells vibrates under the influence of the alternating electric field, causing the surface of the capacitor cell casing to vibrate. The air adjacent to the capacitor cell casing then vibrates, producing sound. In UHV and UHV power systems, these parallel capacitor and filter capacitor devices are characterized by large capacity, large footprint, and high towers. Under certain conditions, the combined noise from all capacitor cells can reach a audible noise level greater than 60 dB, adversely affecting the production and lives of surrounding residents.

[0003] The existing publication number CN106783167B discloses a power capacitor with a noise reduction device, including a metal outer shell that is sealed to the capacitor shell, the metal outer shell being filled with a damping material, and the damping material being filled with high-density particles and / or air bubbles.

[0004] While the aforementioned power capacitors can reduce noise and facilitate installation and maintenance while ensuring safe operation, they are not convenient for operators to maintain. Utility Model Content

[0005] The purpose of this application is to address the aforementioned technical problems by providing a power capacitor with a noise reduction device, which allows for easy removal of the noise reduction device from the power capacitor, making it easier for operators to perform maintenance on the power capacitor.

[0006] This application provides a power capacitor with a noise reduction device, including a power capacitor housing, and further comprising:

[0007] A metal casing, which is mounted on the housing of a power capacitor;

[0008] Damping material, wherein the damping material is placed in the interlayer between the metal shell and the power capacitor shell;

[0009] The metal casing includes a mounting sleeve and a mounting cover. The mounting sleeve is mounted on the power capacitor casing, and the mounting cover is mounted on the mounting sleeve.

[0010] When a noise reduction device needs to be installed, damping material is filled inside the mounting sleeve. The damping material is an elastic material filled with high-density particles or air bubbles. The damping material can absorb the main noise generated by the power capacitor. When the damping material needs to be replaced, the user can easily replace it by removing the mounting cover from the mounting sleeve. At the same time, the mounting sleeve and mounting cover can be used together to easily remove the noise reduction device from the power capacitor, making it easier for the operator to inspect and maintain the power capacitor.

[0011] Furthermore, the metal casing also includes:

[0012] An insert frame, wherein the insert frame is connected and installed to the mounting cover;

[0013] Insertion slot, the insertion slot being disposed on the mounting sleeve;

[0014] A locking component is mounted on the mounting cover.

[0015] When the mounting cover is installed on the mounting sleeve, the insert frame on the mounting cover is inserted into the insert groove on the mounting sleeve. The insert groove limits the insertion frame, which can prevent the mounting cover from falling out of the mounting sleeve and improve the stability of the metal shell mounting position.

[0016] Furthermore, the metal casing also includes:

[0017] A sealing groove, wherein the sealing groove is disposed on the insert groove;

[0018] A sealing strip, which is installed on the insert frame.

[0019] When the insert frame on the mounting cover is inserted into the insert groove on the mounting sleeve, the sealing strip will also be inserted into the sealing groove on the insert groove. The cooperation between the sealing strip and the sealing groove can further improve the noise reduction effect on the power capacitor.

[0020] Furthermore, the locking component includes:

[0021] A spring cavity is disposed on the insert frame;

[0022] A compression spring, one end of which is mounted on a spring cavity;

[0023] A limiting plate, wherein the limiting plate is placed inside the spring cavity and mounted on the compression spring;

[0024] A locking block, which is mounted on a limiting plate;

[0025] Locking groove, which is disposed in the insert frame.

[0026] After the mounting cover is installed on the mounting sleeve, in order to prevent the mounting cover from falling off the mounting sleeve, the user can insert the locking block on the limiting plate into the locking groove to lock the position between the mounting cover and the mounting sleeve. When the locking block is locked in the locking groove, the compression spring will apply pressure to the locking block, making it more difficult for the locking block to fall off.

[0027] Furthermore, the metal casing is provided with anti-collision pads.

[0028] The metal casing is equipped with anti-collision pads, which can prevent the metal casing from being damaged by impacts and collisions, thus avoiding loss of airtightness and weakening or eliminating the noise reduction effect of the noise reduction device on the power capacitor.

[0029] Furthermore, the lock block is provided with a pull handle.

[0030] The lock block is equipped with a pull handle, which allows the operator to easily remove the mounting cover when needed. The operator pulls the pull handle to move in the opposite direction of the lock groove. At this time, the compression spring is squeezed by the limiting plate until the lock block is separated from the lock groove. Then the user can remove the mounting cover from the mounting sleeve.

[0031] The beneficial effects of this application are:

[0032] 1. The mounting sleeve and mounting cover can be used together to easily remove the noise reduction device on the power capacitor, making it easier for the operator to inspect and maintain the power capacitor.

[0033] 2. The insertion groove limits the insertion frame, which can prevent the mounting cover from falling out of the mounting sleeve and improve the stability of the metal shell installation position;

[0034] 3. When the insert frame on the mounting cover is inserted into the insert groove on the mounting sleeve, the sealing strip will also be inserted into the sealing groove on the insert groove. The cooperation between the sealing strip and the sealing groove can further improve the noise reduction effect on the power capacitor. Attached Figure Description

[0035] Figure 1 This is a cross-sectional view of the overall structure of this application;

[0036] Figure 2 This application is Figure 1 Enlarged view of part A;

[0037] Figure 3 This is a partial schematic diagram of the overall structure of this application;

[0038] The reference numerals in the figure are as follows: 100, power capacitor housing; 200, metal casing; 210, mounting sleeve; 220, mounting cover; 230, insertion strip frame; 240, insertion strip groove; 250, locking assembly; 251, spring cavity; 252, compression spring; 253, limit plate; 254, locking block; 255, locking groove; 260, sealing groove; 270, sealing strip; 280, anti-collision pad; 290, pull handle; 300, damping material. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application are within the scope of protection of this application.

[0040] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0041] The embodiments of this application will be described in detail below with reference to the accompanying drawings and specific examples and application scenarios.

[0042] Example 1:

[0043] like Figure 1 , Figure 2 , Figure 3 As shown, this application embodiment provides a power capacitor with a noise reduction device, including a power capacitor housing 100, and further comprising:

[0044] A metal casing 200 is mounted on a power capacitor housing 100;

[0045] Damping material 300 is placed in the interlayer between the metal shell 200 and the power capacitor shell 100;

[0046] The metal casing 200 includes a mounting sleeve 210 and a mounting cover 220. The mounting sleeve 210 is mounted on the power capacitor casing 100, and the mounting cover 220 is mounted on the mounting sleeve 210.

[0047] When a noise reduction device needs to be installed, damping material 300 is filled inside the mounting sleeve 210. The damping material 300 is an elastic material and is filled with high-density particles or air bubbles. The damping material 300 can absorb the main noise generated by the power capacitor. When the damping material 300 needs to be replaced, the user can easily replace it by removing the mounting cover 220 from the mounting sleeve 210. At the same time, the mounting sleeve 210 and the mounting cover 220 work together to easily remove the noise reduction device from the power capacitor, making it easier for the operator to inspect and maintain the power capacitor.

[0048] Example 2:

[0049] like Figure 1 , Figure 2 As shown, this application embodiment provides a power capacitor with a noise reduction device. In addition to the above-mentioned technical features, the metal casing 200 further includes:

[0050] Insert frame 230, which is connected and installed with mounting cover 220;

[0051] Insertion slot 240, the insertion slot 240 being disposed on mounting sleeve 210;

[0052] Locking component 250 is mounted on mounting cover 220.

[0053] When the mounting cover 220 is installed on the mounting sleeve 210, the insert frame 230 on the mounting cover 220 is inserted into the insert groove 240 on the mounting sleeve 210. The insert groove 240 limits the insert frame 230, which can prevent the mounting cover 220 from coming out of the mounting sleeve 210 and improve the stability of the installation position of the metal shell 200.

[0054] Example 3:

[0055] like Figure 2 As shown, this application embodiment provides a power capacitor with a noise reduction device. In addition to the above-mentioned technical features, the metal casing 200 further includes:

[0056] A sealing groove 260 is provided on the insert groove 240;

[0057] A sealing strip 270 is installed on the insert frame 230.

[0058] When the insert frame 230 on the mounting cover 220 is inserted into the insert groove 240 on the mounting sleeve 210, the sealing strip 270 will also be inserted into the sealing groove 260 on the insert groove 240. The cooperation between the sealing strip 270 and the sealing groove 260 can further improve the noise reduction effect on the power capacitor.

[0059] Example 4:

[0060] like Figure 2 As shown, this application embodiment provides a power capacitor with a noise reduction device. In addition to the above-mentioned technical features, the locking component 250 includes:

[0061] Spring cavity 251, the spring cavity 251 is disposed on insert frame 230;

[0062] A compression spring 252, one end of which is mounted on a spring cavity 251;

[0063] A limiting plate 253 is placed inside a spring cavity 251 and mounted on a compression spring 252.

[0064] Locking block 254, which is mounted on limiting plate 253;

[0065] Locking groove 255 is provided in insert frame 230.

[0066] After the mounting cover 220 is installed on the mounting sleeve 210, in order to prevent the mounting cover 220 from falling off the mounting sleeve 210, the user can insert the locking block 254 on the limiting plate 253 into the locking groove 255 to lock the position between the mounting cover 220 and the mounting sleeve 210. When the locking block 254 is locked in the locking groove 255, the compression spring 252 will apply pressure to the locking block 254 to make the locking block 254 more difficult to fall off.

[0067] Example 5:

[0068] like Figure 1 As shown, this application embodiment provides a power capacitor with a noise reduction device. In addition to the above-mentioned technical features, the metal casing 200 is provided with an anti-collision pad 280.

[0069] The metal casing 200 is provided with anti-collision pads 280, which can prevent the metal casing 200 from being damaged by impacts and collisions, thus preventing it from losing its airtightness and causing the noise reduction effect of the noise reduction device on the power capacitor to weaken or disappear.

[0070] Example 6:

[0071] like Figure 2 As shown, this application embodiment provides a power capacitor with a noise reduction device. In addition to the above-mentioned technical features, the locking block 254 is provided with a pull handle 290.

[0072] The locking block 254 is provided with a pull handle 290, which allows the operator to easily remove the mounting cover 220 when needed. The operator pulls the pull handle 290 to move in the opposite direction to the locking groove 255. At this time, the compression spring 252 is squeezed by the limiting plate 253 until the locking block 254 is disengaged from the locking groove 255. At this time, the user can remove the mounting cover 220 from the mounting sleeve 210.

[0073] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0074] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A power capacitor with a noise reduction device, comprising a power capacitor housing (100), characterized in that Also include: A metal shell (200) mounted on the power capacitor housing (100); Damping material (300) placed in the interlayer between the metal shell (200) and the power capacitor housing (100); Wherein, the metal shell (200) includes mounting sleeve (210), mounting cover (220), the mounting sleeve (210) is mounted on the power capacitor housing (100), the mounting cover (220) is mounted on the mounting sleeve (210).

2. A power capacitor having a noise reduction device according to claim 1, wherein The metal shell (200) further comprises: Plug frame (230), the plug frame (230) is connected with the mounting cover (220) installation; Plug slot (240), the plug slot (240) is provided on the mounting sleeve (210); Locking assembly (250), the locking assembly (250) is installed on the mounting cover (220).

3. A power capacitor having a noise reduction device as claimed in claim 2, characterized in that The metal shell (200) further comprises: Sealing groove (260), the sealing groove (260) is provided on the plug slot (240); Sealing strip (270), the sealing strip (270) is installed on the plug frame (230).

4. A power capacitor having a noise reduction device as defined in claim 3, wherein The locking assembly (250) comprises: Spring cavity (251), the spring cavity (251) is provided on the plug frame (230); Compression spring (252), one end of the compression spring (252) is mounted on the spring cavity (251); Limiting plate (253), the limiting plate (253) is placed in the spring cavity (251) and is mounted on the compression spring (252); Lock block (254), the lock block (254) is installed on the limiting plate (253); Lock slot (255), the lock slot (255) is provided on the plug frame (230).

5. A power capacitor having a noise reduction device as defined in claim 4, wherein The metal shell (200) is provided with anti-collision pad (280).

6. A power capacitor having a noise reduction device as defined in claim 5, wherein The lock block (254) is provided with a pull handle (290).

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