阅读说明：本技术 一种卧式电容器连接结构 (Horizontal capacitor connecting structure ) 是由 佘振球 孙健 施洋洋 杨懿功 宋戈 顾杰 于 2020-07-01 设计创作，主要内容包括：本发明公开了一种卧式电容器连接结构,包括支撑板(1)、上电容器(2)、下电容器(3)和连接片(5),所述支撑板(1)垂直固定,所述上电容器(2)和下电容器(3)按照上下位置设置,所述上电容器(2)和下电容器(3)通过底部安装柱头卧式安装在所述支撑板(1)上,所述连接片(5)中间段开设有泄能孔(6),所述连接片(5)的两端分别开设安装孔,所述上电容器(2)和下电容器(3)的顶部柱头分别穿过两个所述安装孔后用螺帽(4)锁紧,所述连接片(5)为Z字形结构。本发明提供的一种卧式电容器连接结构,能够避免连接片在设备运行时受到交变应力容易发生疲劳断裂。(The invention discloses a horizontal capacitor connecting structure which comprises a supporting plate (1), an upper capacitor (2), a lower capacitor (3) and a connecting piece (5), wherein the supporting plate (1) is vertically fixed, the upper capacitor (2) and the lower capacitor (3) are arranged at the upper position and the lower position, the upper capacitor (2) and the lower capacitor (3) are horizontally arranged on the supporting plate (1) through mounting studs at the bottoms, an energy release hole (6) is formed in the middle section of the connecting piece (5), mounting holes are respectively formed in two ends of the connecting piece (5), top studs of the upper capacitor (2) and the lower capacitor (3) respectively penetrate through the two mounting holes and then are locked through nuts (4), and the connecting piece (5) is of a Z-shaped structure. The horizontal capacitor connecting structure provided by the invention can avoid the connecting sheet from being easily subjected to fatigue fracture when equipment runs under alternating stress.)

1. The utility model provides a horizontal capacitor connection structure which characterized in that: the capacitor structure comprises a supporting plate (1), an upper capacitor (2), a lower capacitor (3) and a connecting piece (5), wherein the supporting plate (1) is vertically fixed, the upper capacitor (2) and the lower capacitor (3) are arranged according to the upper position and the lower position, the upper capacitor (2) and the lower capacitor (3) are horizontally arranged on the supporting plate (1) through a bottom mounting column head, an energy release hole (6) is formed in the middle section of the connecting piece (5), mounting holes are formed in two ends of the connecting piece (5) respectively, and the top column heads of the upper capacitor (2) and the lower capacitor (3) respectively penetrate through the two mounting holes and then are locked through nuts (4).

2. The horizontal capacitor connecting structure according to claim 1, wherein: the connecting piece (5) is of a Z-shaped structure.

3. The horizontal capacitor connecting structure according to claim 2, wherein: the number of the energy leakage holes (6) is N, wherein N is an integer greater than or equal to 1.

4. The horizontal capacitor connecting structure according to claim 1, wherein: the connecting sheet (5) is made of rigid metal.

5. The horizontal capacitor connecting structure according to claim 1, wherein: the thickness of the connecting sheet (5) is more than or equal to 0.5 mm.

6. The horizontal capacitor connecting structure according to claim 5, wherein: the thickness of the connecting piece (5) is 1 mm.

Technical Field

The invention relates to a horizontal capacitor connecting structure, and belongs to the technical field of power electronic equipment.

Background

With the application and popularization of the high-voltage direct-current transmission technology in a power system, the reliability of a core component, namely a high-power high-voltage series thyristor valve, becomes the key of system safety. The damping loop is an important branch circuit for realizing the performance of the converter valve and ensuring the safe operation of the converter valve, and has the functions of inhibiting voltage overshoot, dynamically equalizing voltage and providing energy for a thyristor trigger circuit. The damping loop is formed by connecting a damping resistor and a damping capacitor in series. Damping capacitors are generally assembled in the structure of an assembly in converter valves. Each thyristor stage is formed by connecting two damping capacitors in series, and the two damping capacitor column heads at the same stage are electrically connected by a metal conductor. In order to achieve convenient wiring and space saving, the horizontal capacitor mounting structure is generally applied to the structural design of the converter valve.

The capacitor assembly is horizontally arranged, the capacitor supporting plate is vertically arranged, the capacitor is vertically arranged on the capacitor supporting plate, gravity is borne by the capacitor mounting stud, the two capacitors are usually connected in a metal connecting sheet, and the end parts of the capacitors are supported by the metal connecting sheet.

For a capacitor which is horizontally mounted, only the bottom of the capacitor is fixed on the supporting plate, and the capacitor is of a cantilever structure in the horizontal direction, so that the capacitor is greatly influenced by the self gravity of the capacitor and the vibration of equipment during operation. Two condenser tip at the same level need the connection piece to carry out the rigidity and support and avoid the condenser to take place great rocking, but the connection piece makes faying surface department produce fatigue fracture easily because of consuming the energy that the vibration produced simultaneously. The connecting piece that present condenser adopted only considers the supporting role to the condenser tip, and the condenser connecting piece has the not enough problem of antifatigue intensity, influences the operation of converter valve safety and stability.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a horizontal capacitor connecting structure which can prevent a connecting sheet from being easily subjected to fatigue fracture due to alternating stress when equipment runs.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a horizontal capacitor connecting structure comprises a supporting plate, an upper capacitor, a lower capacitor and a connecting piece, wherein the supporting plate is vertically fixed, the upper capacitor and the lower capacitor are arranged at upper and lower positions, the upper capacitor and the lower capacitor are horizontally arranged on the supporting plate through bottom mounting column heads, energy release holes are formed in the middle section of the connecting piece, mounting holes are formed in two ends of the connecting piece respectively, and top column heads of the upper capacitor and the lower capacitor are locked by nuts after penetrating through the two mounting holes respectively.

The connecting piece is of a Z-shaped structure.

The number of the energy leakage holes is N, wherein N is an integer greater than or equal to 1.

The connecting sheet is made of rigid metal.

The thickness of the connecting piece is more than or equal to 0.5 mm.

The thickness of connecting piece is 1 millimeter.

The invention has the beneficial effects that: the invention discloses a horizontal capacitor connecting structure.A hole or a plurality of holes are formed in the middle section of a connecting sheet to release vibration energy, so that the flexibility of the middle section is increased, the stress at the column heads of two capacitors is reduced, the vibration fatigue resistance is improved, and the fatigue resistance of the connecting sheet of the capacitor can be improved; the connecting sheet is designed in a Z shape, so that the vibration impact acting on the lapping surface in the vertical direction among the capacitors with different heights can be relieved; the connecting sheet is made of rigid metal and has a thickness of more than or equal to 0.5 mm, so that the mechanical strength and the fatigue and aging resistance of the connecting sheet are improved. The structure of the invention is simple, the capacitor connecting sheet structure is ingenious, the problem of insufficient supporting strength of the end part of the horizontal capacitor is solved, the vibration fatigue resistance of the capacitor connecting sheet is improved, and the operation reliability of the converter valve is effectively improved.

Drawings

Fig. 1 is a schematic structural diagram of a horizontal capacitor connection structure according to the present invention.

The reference numbers in the figures are as follows: 1-a support plate; 2-upper capacitor; 3-a lower capacitor; 4-a screw cap; 5-connecting the sheet; 6-energy release hole.

Detailed Description

The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.

As shown in fig. 1, the present invention provides a horizontal capacitor connecting structure, which includes a supporting plate 1, an upper capacitor 2, a lower capacitor 3 and a connecting piece 5. The supporting plate 1 is vertically fixed, the upper capacitor 2 and the lower capacitor 3 are arranged according to the upper position and the lower position, the upper position and the lower position of the installation position can be flexibly adjusted according to the requirement of the structural space, and the two capacitors are integrally kept to be installed up and down.

The upper capacitor 2 and the lower capacitor 3 are horizontally arranged on the supporting plate 1 through mounting column heads at the bottom, the connecting sheet 5 is of a Z-shaped structure, mounting holes are respectively formed in two ends of the connecting sheet 5, and the top column heads of the upper capacitor 2 and the lower capacitor 3 respectively penetrate through the two mounting holes and then are locked through the screw caps 4. The connecting sheet 5 adopts a Z-shaped design to relieve the vibration impact acting on the lapping surface in the vertical direction between the capacitors with different heights.

The middle section of the connecting sheet 5 is provided with an energy release hole 6. The number of the energy leakage holes 6 is N, wherein N is an integer greater than or equal to 1. The number of the open holes can be flexibly designed according to the length of the connecting sheet, and in the embodiment, the number of the energy leakage holes 6 is preferably 3. The design of the energy release holes 6 enables the intermediate portion of the connecting piece 5 to be more flexible and reduces the stress at the two capacitor column heads.

The connecting piece 5 may be made of various metals having good conductivity, and has high rigidity, and the mechanical strength and fatigue aging resistance of the connecting piece 5 can be improved. The thickness of the connecting piece 5 is 0.5 mm or more, and in this embodiment, the thickness of the connecting piece 5 is 1 mm.

The invention provides a capacitor connecting structure which is simple in structure and convenient and fast to install, can enhance the fatigue resistance of a capacitor connecting sheet, and avoids the connecting sheet from being broken due to vibration generated in the operation process.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.