A high-temperature resistant and high-voltage resistant electrical insulation device

Abstract

This utility model relates to a high-temperature resistant and high-voltage resistant electrical insulation device, including a high-temperature resistant insulation plate, an inlaid sleeve, and an inlaid fixing mechanism. The high-temperature resistant insulation plate is set at the entrance of the electrostatic precipitator equipment cavity and the cathode insulation box through the inlaid fixing mechanism. There are two high-temperature resistant insulation plates, which are symmetrically arranged and have an inlaid hole in the center. The inlaid sleeve is installed between the inlaid hole of the high-temperature resistant insulation plate and the head of the cathode rapping shaft. The inlaid fixing mechanism is used to prevent the high-temperature resistant insulation plate from moving, which can significantly reduce the dust accumulation in the insulation box. When the cathode insulation is damaged, it can be easily replaced, improving maintenance safety.

Description

Technical Field

[0001] This utility model relates to a high-temperature resistant and high-voltage resistant electrical insulation device, belonging to the technical field of cathode insulation boxes. Background Technology

[0002] Electrostatic precipitators in the non-ferrous metallurgical industry require 45-72KV DC high-voltage electricity to operate. An electrostatic precipitator typically consists of an external cathode, an anode rapping motor, a cathode insulating ceramic shaft, rapping hammers, cathode wires, and an anode plate. The external rapping motor is not energized, while the cathode rapping and cathode wires are energized with high-voltage DC. The external cathode rapping motor is connected to the cathode rapping via the cathode insulating ceramic shaft. The cathode insulating ceramic shaft, as a transmission and insulation component, plays a crucial role in the operation of the electric field. Placed inside the cathode insulation box, long-term operation can lead to dust accumulation and creepage, causing breakage. Breakage results in poor or no power delivery from the electric field. The solution is to isolate the cathode insulation box from the flue gas in the electric field, minimizing dust entry into the insulation box and ensuring the cathode insulating ceramic tiles remain clean. Utility Model Content

[0003] To address the aforementioned problems in existing technologies, this utility model provides a high-temperature and high-voltage resistant electrical insulation device that can significantly reduce dust accumulation inside the insulation box, facilitate replacement when the cathode insulation is damaged, and improve maintenance safety.

[0004] The technical solution of this utility model is as follows:

[0005] A high-temperature resistant and high-voltage-resistant electrical insulation device includes a high-temperature resistant insulation plate, an inlaid sleeve, and an inlay fixing mechanism. The high-temperature resistant insulation plate is installed at the entrance of the electrostatic precipitator equipment cavity and the cathode insulation box through the inlay fixing mechanism. There are two high-temperature resistant insulation plates, which are symmetrically arranged and have an inlay hole in the center. The inlay sleeve is installed between the inlay hole of the high-temperature resistant insulation plate and the head of the cathode rapping shaft. The inlay fixing mechanism is used to prevent the high-temperature resistant insulation plate from moving.

[0006] The inlay fixing mechanism includes an angle steel positioning frame and an anti-movement slot. The angle steel positioning frame includes a vertical fixing part and a horizontal extension part. The vertical fixing part is welded to the cathode insulation box, and the horizontal extension part extends outward toward the high-temperature resistant insulation board. The anti-movement slot is welded to the horizontal extension part, and the inner wall of the anti-movement slot is provided with a dovetail tenon. The high-temperature resistant insulation board is provided with a dovetail groove. The dovetail groove and the dovetail tenon form an interference fit.

[0007] The inlay sleeve consists of two pieces, and a pre-made groove is formed on the inlay sleeve. The pre-made groove matches the edge of the inlay hole of the high-temperature resistant insulation board.

[0008] The high-temperature resistant insulating board is composed of an alumina ceramic substrate and a silicon nitride composite layer. The surface of the alumina ceramic substrate is provided with a honeycomb heat dissipation hole array, and the silicon nitride composite layer is formed on the surface of the heat dissipation hole array by plasma spraying.

[0009] The bottom of the anti-slip groove is provided with an elastic compensation pad, which is made of chromium-nickel alloy spring steel and is continuously distributed in a wave shape.

[0010] This utility model has the following beneficial effects:

[0011] This invention uses two symmetrical high-temperature resistant insulating plates and their tight fit with the embedded sleeve. During installation, the embedded sleeve is inserted into the embedded hole of the high-temperature resistant insulating plate to wrap around the head of the cathode rapping shaft, thus completing the sealing and isolation between the inside and outside channels of the insulation box, effectively preventing dust from entering the insulation box and significantly reducing dust accumulation inside the box.

[0012] This utility model uses a vertical fixing part of an angle steel positioning frame welded to the inner wall of a cathode insulation box and a horizontal extension part welded with an anti-movement groove. During installation, the dovetail groove of the high-temperature resistant insulation board is interference-fitted with the dovetail tenon of the anti-movement groove to complete the rigid fixation of the high-temperature resistant insulation board, avoiding displacement caused by vibration or thermal deformation, and further reducing dust accumulation gaps caused by structural loosening. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the high-temperature resistant insulating board of this utility model;

[0015] Figure 3 This is a schematic diagram of the inlay and fixing mechanism of this utility model;

[0016] Figure 4 This is a schematic diagram of the installation of the cathode rapping shaft of this utility model.

[0017] The reference numerals in the figure are as follows:

[0018] 1. High-temperature resistant insulation board; 2. Inlaid sleeve; 3. Inlaid fixing mechanism; 11. Inlaid hole; 12. Dovetail groove; 21. Precast groove; 31. Angle steel positioning frame; 32. Anti-movement slot; 33. Elastic compensation gasket; 311. Vertical fixing part; 312. Horizontal extension part; 321. Dovetail tenon. Detailed Implementation

[0019] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0020] Please see Figures 1 to 4The utility model provides a technical solution:

[0021] A high-temperature resistant and high-voltage-resistant electrical insulation device includes a high-temperature resistant insulation plate 1, an inlaid sleeve 2, and an inlay fixing mechanism 3. The high-temperature resistant insulation plate 1 is installed at the entrance of the cathode insulation box of the electrostatic precipitator through the inlay fixing mechanism 3. There are two high-temperature resistant insulation plates 1, which are symmetrically arranged and have an inlay hole 11 in the center. The inlay sleeve 2 is installed between the inlay hole 11 of the high-temperature resistant insulation plate 1 and the head of the cathode rapping shaft. The inlay fixing mechanism 3 is used to prevent the high-temperature resistant insulation plate 1 from moving. After the two high-temperature resistant insulation plates 1 are symmetrically installed at the entrance of the cathode insulation box and fixed in position by the inlay fixing mechanism 3, the inlay sleeve 2 is inserted into the inlay hole 11 of the insulation plate 1 to wrap the cathode rapping shaft. At the same time, the symmetrical design of the high-temperature resistant insulation plates 1 achieves a sealed connection of the rapping shaft through the inlay sleeve 2, effectively isolating dust from entering the insulation box. The inlay fixing mechanism 3 suppresses displacement, significantly reduces dust accumulation, and facilitates replacement.

[0022] The mounting and fixing mechanism 3 includes an angle steel positioning frame 31 and an anti-movement groove 32. The angle steel positioning frame 31 includes a vertical fixing part 311 and a horizontal extension part 312. The vertical fixing part 311 is welded to the cathode insulation box, and the horizontal extension part 312 extends outward toward the high-temperature resistant insulation plate 1. The anti-movement groove 32 is welded to the horizontal extension part 312. The inner wall of the anti-movement groove 32 is provided with a dovetail tenon 321, and the high-temperature resistant insulation plate 1 is provided with a dovetail tenon 12. An interference fit is formed with the dovetail tenon 321; the vertical fixing part 311 of the angle steel positioning frame 31 is welded to the outer shell of the insulation box, and the horizontal extension part 312 extends outward and then the anti-movement groove 32 is welded on. The installation is completed by the interference fit between the dovetail tenon 321 and the dovetail groove 12; the angle steel positioning frame 31 provides rigid support, and the dovetail groove 12 and the dovetail tenon 321 can be quickly disassembled and assembled, and the interference fit eliminates the gap, which completely prevents the axial movement of the high temperature resistant insulation board 1 and reduces the maintenance frequency.

[0023] The inlay sleeve 2 consists of two pieces, each with a pre-formed groove 21 that matches the edge of the inlay hole 11 in the high-temperature resistant insulation board 1. After precisely aligning the pre-formed groove 21 of the inlay sleeve 2 with the edge of the inlay hole 11 in the high-temperature resistant insulation board 1, it is pressed into place, ensuring a tight fit between the inlay sleeve 2 and the hole wall of the inlay hole 11. The pre-formed groove 21 simplifies installation and positioning, improves sealing, prevents fretting wear between the inlay sleeve 2 and the high-temperature resistant insulation board 1, and extends service life.

[0024] The high-temperature resistant insulation board 1 is composed of an alumina ceramic substrate and a silicon nitride composite layer. The surface of the alumina ceramic substrate is provided with a honeycomb heat dissipation hole array, and the silicon nitride composite layer is formed on the surface of the heat dissipation hole array by plasma spraying process. The honeycomb structure increases the heat dissipation area, and the silicon nitride layer enhances the arc resistance and thermal shock resistance. The composite structure enables the high-temperature resistant insulation board 1 to maintain excellent insulation and mechanical strength under high temperature and high pressure.

[0025] The bottom of the anti-slip groove 32 is provided with an elastic compensation pad 33. The elastic compensation pad 33 is made of chromium-nickel alloy spring steel and is continuously distributed in a wave shape. The elastic compensation pad 33 absorbs vibration and relieves temperature stress, preventing the tenon joint structure between the dovetail tenon 321 and the dovetail groove 12 from loosening due to thermal deformation, thus ensuring long-term operational stability.

[0026] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high temperature resistant, high voltage proof, electrically insulating device, characterized in that: The device includes a high-temperature resistant insulating plate (1), an inlay sleeve (2), and an inlay fixing mechanism (3). The high-temperature resistant insulating plate (1) is installed at the entrance of the electrostatic precipitator equipment cavity and the cathode insulation box via the inlay fixing mechanism (3). There are two high-temperature resistant insulating plates (1), and the two symmetrically arranged high-temperature resistant insulating plates (1) have an inlay hole (11) in the center. The inlay sleeve (2) is installed between the inlay hole (11) of the high-temperature resistant insulating plate (1) and the head of the cathode rapping shaft. The inlay fixing mechanism (3) is used to prevent the high-temperature resistant insulating plate (1) from moving. The inlay fixing mechanism (3) includes an angle steel positioning frame. (31) and anti-slip groove (32), the angle steel positioning frame (31) includes a vertical fixing part (311) and a horizontal extension part (312). The vertical fixing part (311) is welded to the cathode insulation box, and the horizontal extension part (312) extends toward the outside of the high temperature resistant insulation plate (1). The anti-slip groove (32) is welded to the horizontal extension part (312). The inner wall of the anti-slip groove (32) is provided with a dovetail tenon (321). The high temperature resistant insulation plate (1) is provided with a dovetail tenon (12). The dovetail tenon (12) and the dovetail tenon (321) form an interference fit.

2. A high temperature resistant high voltage proof electrical insulation arrangement according to claim 1, characterized in that The inlay sleeve (2) consists of two pieces, and a pre-made groove (21) is provided on the inlay sleeve (2). The pre-made groove (21) matches the edge of the inlay hole (11) of the high temperature resistant insulation board (1).

3. A high temperature resistant high voltage proof insulation device as claimed in claim 1, characterized in that: The high-temperature resistant insulating board (1) is composed of an alumina ceramic substrate and a silicon nitride composite layer. The surface of the alumina ceramic substrate is provided with a honeycomb heat dissipation hole array, and the silicon nitride composite layer is formed on the surface of the heat dissipation hole array by plasma spraying process.

4. A high temperature resistant high voltage proof insulation device as claimed in claim 1, characterized in that: The bottom of the anti-slip groove (32) is provided with an elastic compensation pad (33), which is made of chromium-nickel alloy spring steel and is continuously distributed in a wave shape.

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