Excitation power cabinet resistance-capacitance protection device structure and resistance-capacitance protection device

Abstract

The utility model relates to the technical field of resistance and capacity protection, specifically relates to a kind of resistance and capacity protection device structural member and resistance and capacity protection device of excitation power cabinet resistance and capacity protection device, including the resistance and capacity connection copper bar of several resistance and capacity connection copper bar being set on air duct backplate, the resistance and capacity connection copper bar has with the first copper bar section of resistance and capacity connection copper bar being connected with the inside of air duct backplate and the second copper bar section extending to the outside of air duct backplate, the second copper bar section of each resistance and capacity connection copper bar forms the copper bar wiring area for AC / DC cable wiring on the outside of air duct backplate.The utility model is by the bolt of original bearing energy transmission and fixed, one is located in air duct, is responsible for energy transmission, to facilitate maintenance for temperature measurement inspection, another is located in air duct, realizes the fixation of resistance and capacity connection copper bar, so it can be convenient to check the fastening condition of nut, reduce the risk of bolt loosening, and further guarantee the safe operation of unit.

Description

Technical Field

[0001] This utility model relates to the field of RC protection technology, specifically to a structural component and a RC protection device for an excitation power cabinet. Background Technology

[0002] The excitation system's RC protection device, serving as an overvoltage absorption device for the rectifier bridge's silicon controlled rectifier (SCR) commutation, is a discrete structure; see [link / reference]. Figure 1 As shown, the existing RC protection device is connected to the six AC connection cables and two DC connection cables of the AC / DC copper busbar on the back panel inside the power cabinet duct. A single screw connects the connection cables, the RC device connecting copper busbar, the duct back panel, and the RC device fixing plate simultaneously. A total of three nuts are used to achieve this purpose. Two of these nuts are located between the RC device fixing plate and the duct back panel, in the middle of the excitation disk cabinet. Therefore, it is impossible to check and handle the tightness of the nuts. If the bolts are loose, they cannot be detected in time. Loose connections and increased contact resistance may cause discharge arcing and equipment damage, affecting the safe operation of the unit.

[0003] Therefore, developing a structural component that allows for intuitive inspection of the connection points and facilitates bolt tightening is of great significance for reducing the risk of bolt loosening and ensuring the safe and stable operation of the unit. Utility Model Content

[0004] The purpose of this utility model is to provide a structural component and a protection device for an excitation power cabinet, so as to solve the technical problems pointed out in the background art.

[0005] This utility model is achieved through the following technical solution: a structural component of an excitation power cabinet RC protection device, including a plurality of RC connection copper busbars disposed on the back plate of the air duct, wherein the RC connection copper busbars have a first copper busbar section connected to the inner side of the back plate of the air duct and a second copper busbar section extending to the outer side of the back plate of the air duct, and the second copper busbar section of each of the RC connection copper busbars forms a copper busbar wiring area for AC / DC cable wiring on the outer side of the back plate of the air duct.

[0006] According to a preferred embodiment, the resistor-capacitor connection copper busbar is a Z-shaped copper busbar, comprising an upper horizontal portion, a middle vertical portion, and a lower horizontal portion.

[0007] According to a preferred embodiment, the first copper busbar section is composed of an upper horizontal part, a middle vertical part, and a lower horizontal head, and the second copper busbar section is composed of a lower horizontal tail. An installation gap is provided between the first copper busbar section and the inner side of the air duct back plate.

[0008] According to a preferred embodiment, a first nut is provided in the installation gap, and a resistor-capacitor fixing template and a second nut are sequentially provided on the inner side of the middle vertical part. The first nut, the middle vertical part, the resistor-capacitor fixing template and the second nut are connected by a first screw.

[0009] According to a preferred embodiment, the head of the first screw is located within the installation gap, and its needle part sequentially passes through the first nut, the middle vertical part, the resistor-capacitor fixing template, and the second nut.

[0010] According to a preferred embodiment, a third nut is provided on the second copper busbar section, and the third nut is connected to the tail of the lower horizontal part through a second screw, forming a cable connection part for AC / DC cable connection between the third nut and the lower horizontal part.

[0011] According to a preferred embodiment, the head of the second screw is located below the lower horizontal portion, and its needle portion is arranged to pass through the lower horizontal portion and the third nut in sequence, while the cable connection portion is located above the lower horizontal portion.

[0012] This utility model also provides an excitation power cabinet RC protection device, including the excitation power cabinet RC protection device structural components as described above.

[0013] The technical solution of the excitation power cabinet RC protection device structure and RC protection device provided by this utility model has at least the following advantages and beneficial effects: (1) This utility model separates the original bolts that are responsible for energy transmission and fixing. One bolt is located outside the air duct and is responsible for energy transmission, which facilitates maintenance and temperature measurement. The other bolt is located inside the air duct and is used to fix the RC connection copper busbar. This makes it easier to check the tightness of the nuts, reduces the risk of bolt loosening, and thus ensures the safe operation of the unit; (2) The AC / DC cable is in direct contact with the surface of the RC connection copper busbar, which increases the contact area and ensures that the cable is reliably connected to the RC protection device. Attached Figure Description

[0014] Figure 1 This is a structural schematic diagram of the excitation power cabinet resistor-capacitor protection device in the background technology; Figure 2 This is a structural schematic diagram of the excitation power cabinet resistor-capacitor protection device provided in Embodiment 1 of this utility model; Reference numerals: 100-Duct backplate, 200-RC connection copper busbar, 210-First copper busbar section, 220-Second copper busbar section, 230-Copper busbar wiring area, 300-Installation gap, 400-First nut, 500-RC device fixing template, 600-Second nut, 700-First screw, 800-Third nut, 900-Second screw. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Example 1 This embodiment provides a structural component for an excitation power cabinet resistor-capacitor protection device. Figure 2 This is a structural diagram of the RC protection device for the excitation power cabinet. (See attached diagram) Figure 2 As shown, the excitation power cabinet RC protection device structure includes several RC connection copper busbars 200 installed on the air duct back plate 100.

[0017] In this embodiment, the RC connection copper busbar 200 is divided into a first copper busbar section 210 and a second copper busbar section 220 by the air duct back plate 100. The first copper busbar section 210 is connected to the inner side of the air duct back plate 100 by bolts, and the second copper busbar section 220 extends to the outer side of the air duct back plate 100 to connect AC / DC cables by bolts. Specifically, the second copper busbar section 220 of each RC connection copper busbar 200 forms a copper busbar connection area 230 for AC / DC cable connection on the outer side of the air duct back plate 100.

[0018] Specifically, this utility model separates the bolts that were originally responsible for energy transmission and fixing. One bolt is located outside the air duct and is responsible for energy transmission, which is convenient for inspection and maintenance, such as temperature measurement. The other bolt is located inside the air duct to fix the copper busbar 200 with resistance and capacitance connection. This solves the problem of inconvenience in checking the tightness of the bolts due to their position in the prior art, reduces the risk of bolt loosening, and thus ensures the safe operation of the unit.

[0019] Example 2 This embodiment, based on the technical solution provided in Embodiment 1, further explains the design of the structural components inside the air duct back panel 100: In this embodiment, the resistor-capacitor connection copper busbar 200 is a Z-shaped copper busbar, which is beneficial for installation and arrangement on the air duct back plate 100. The Z-shaped copper busbar includes an upper horizontal part, a middle vertical part and a lower horizontal part. The upper horizontal part and the lower horizontal part are both set perpendicular to the air duct back plate 100, while the middle vertical part is parallel to the air duct back plate 100.

[0020] The first copper busbar section 210 is composed of an upper horizontal section, a middle vertical section, and a lower horizontal section head. The second copper busbar section 220 is composed of a lower horizontal section tail. An installation gap 300 is provided between the first copper busbar section 210 and the inner side of the air duct back plate 100. Further, a first nut 400 is provided within the installation gap 300. A resistor-capacitor device fixing template 500 and a second nut 600 are sequentially provided on the inner side of the middle vertical section. The first nut 400, the middle vertical section, the resistor-capacitor device fixing template 500, and the second nut 600 are connected by a first screw 700. The head of the first screw 700 is located within the installation gap 300, and its pin portion sequentially passes through the first nut 400, the middle vertical section, the resistor-capacitor device fixing template 500, and the second nut 600, achieving stable fixing of the resistor-capacitor connection copper busbar 200 to the inner side of the air duct back plate 100, ensuring the overall stability of the structural components.

[0021] Example 3 This embodiment, based on the technical solution provided in Embodiment 2, further explains the design of the structural components on the outer side of the air duct backplate 100: In this embodiment, a third nut 800 is provided on the second copper busbar section 220. The third nut 800 is connected to the tail of the lower horizontal section via a second screw 900, forming a cable connection section for AC / DC cable wiring between the third nut 800 and the lower horizontal section. Further, the head of the second screw 900 is located below the lower horizontal section, and its pin passes through the lower horizontal section and the third nut 800 sequentially. The cable connection section is located above the lower horizontal section. Specifically, the connection between the third nut 800, the second screw 900, and the tail of the lower horizontal section forms a clearly defined cable connection section on the second copper busbar section 220, facilitating AC / DC cable wiring. The cable connection section being located above the lower horizontal section, with the head of the second screw 900 below, makes the wiring area clearer and easier to operate, while ensuring the stability of the cable connection and further ensuring the reliability of energy transfer.

[0022] Example 4 This embodiment, based on the technical solutions provided in any one of Embodiments 1 to 3, provides an excitation power cabinet RC protection device. This device includes the structural components described in any one of Embodiments 1 to 3. By applying these structural components to the RC protection device, the entire device possesses the advantages of these components: it allows for direct inspection of connection points, facilitates bolt tightening, reduces the risk of bolt loosening, ensures the safe and stable operation of the unit, and guarantees reliable cable connections.

[0023] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A structural component for an excitation power cabinet RC protection device, characterized in that, The system includes several RC connection copper busbars (200) disposed on the back panel (100) of the air duct. Each RC connection copper busbar (200) has a first copper busbar section (210) connected to the inner side of the back panel (100) of the air duct and a second copper busbar section (220) extending to the outer side of the back panel (100). The second copper busbar section (220) of each RC connection copper busbar (200) forms a copper busbar wiring area (230) for AC / DC cable wiring on the outer side of the back panel (100).

2. The excitation power cabinet RC protection device structural component as described in claim 1, characterized in that, The RC connection copper busbar (200) is a Z-shaped copper busbar, comprising an upper horizontal section, a middle vertical section, and a lower horizontal section.

3. The excitation power cabinet RC protection device structural component as described in claim 2, characterized in that, The first copper busbar section (210) is composed of an upper horizontal part, a middle vertical part and a lower horizontal part head. The second copper busbar section (220) is composed of a lower horizontal part tail. An installation gap (300) is provided between the first copper busbar section (210) and the inner side of the air duct back plate (100).

4. The excitation power cabinet RC protection device structural component as described in claim 3, characterized in that, A first nut (400) is provided in the installation gap (300), and a resistor-capacitor fixing template (500) and a second nut (600) are sequentially provided on the inner side of the middle vertical part. The first nut (400), the middle vertical part, the resistor-capacitor fixing template (500) and the second nut (600) are connected by a first screw (700).

5. The excitation power cabinet RC protection device structural component as described in claim 4, characterized in that, The head of the first screw (700) is located within the installation gap (300), and its needle part is arranged to pass through the first nut (400), the middle vertical part, the resistor-capacitor device fixing template (500) and the second nut (600) in sequence.

6. The excitation power cabinet RC protection device structural component as described in claim 5, characterized in that, The second copper busbar section (220) is provided with a third nut (800), which is connected to the tail of the lower horizontal part by a second screw (900). The third nut (800) and the lower horizontal part form a cable connection part for AC / DC cable connection.

7. The excitation power cabinet RC protection device structural component as described in claim 6, characterized in that, The head of the second screw (900) is located below the lower horizontal part, and its needle part is arranged to pass through the lower horizontal part and the third nut (800) in sequence. The cable connection part is located above the lower horizontal part.

8. A resistor-capacitor protection device for an excitation power cabinet, characterized in that, It includes the excitation power cabinet RC protection device structural component as described in any one of claims 1 to 7.

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