A transformer wall-mounted neutral point device

Abstract

This utility model relates to the field of high-voltage equipment technology and proposes a transformer wall-mounted neutral point device, including a transformer and a neutral point device. The neutral point device is located on one side of the transformer. The neutral point device and the transformer are connected by a seismic expansion joint fixed with screws. The seismic expansion joint includes an expansion part and connecting parts located on both sides of the expansion part. The two sides of the expansion part are connected to the two connecting parts by welding. A connecting chain connects the two expansion parts. By installing the neutral point device on the transformer body, the concrete foundation in the prior art is eliminated, saving civil engineering costs and improving the efficiency of installing the neutral point device. Without a separate foundation, there is no need to consider the damage to structural components caused by foundation settlement. Finally, the integrated structure has better seismic performance.

Description

Technical Field

[0001] This utility model relates to the field of high voltage equipment technology, specifically to a transformer wall-mounted neutral point device. Background Technology

[0002] Currently, power transformers are crucial electrical equipment in power systems, used to transform AC voltage. The neutral point of a transformer is typically directly grounded. Our company's fully insulated, enclosed neutral point gap grounding protection device encloses the discharge gap, current transformer, surge arrester, grounding switch, and other components from the transformer's neutral point within an SF6 gas chamber, enabling two different operating modes: grounded or ungrounded neutral point. This prevents damage to the transformer caused by a rise in neutral point voltage due to system faults.

[0003] The neutral point devices in the prior art have the following problems:

[0004] The neutral point equipment in the existing technology uses an independent neutral point device, which requires the pre-pouring of a concrete foundation during the installation process, making the installation process relatively complicated. At the same time, because the neutral point device and the transformer use separate foundations, it is necessary to take into account the damage to the structural components caused by subsequent terrain settlement. Utility Model Content

[0005] This utility model proposes a wall-mounted neutral point device for transformers, which solves the problems of cumbersome installation and poor seismic performance caused by independent installation of neutral point devices in related technologies.

[0006] The technical solution of this utility model is as follows:

[0007] To achieve the above objectives, this utility model provides the following technical solution: a transformer wall-mounted neutral point device, comprising a transformer and a neutral point device, wherein the neutral point device is located on one side of the transformer, and the neutral point device and the transformer are connected by a seismic expansion joint fixedly connected by screws, wherein the seismic expansion joint comprises an expansion part and connecting parts located on both sides of the expansion part, the two sides of the expansion part are connected to the two connecting parts by welding, and a connecting chain is connected between the two expansion parts;

[0008] The neutral point device is provided with a lower seismic support at its bottom. One side of the lower seismic support is fixedly connected to the transformer by screws. A middle seismic support is provided on one side of the neutral point device. One end of the middle seismic support is fixedly connected to the transformer by screws.

[0009] Preferably, the neutral point device has a neutral point structure inside, the neutral point structure is made of metal material, and a sealed gas chamber is opened inside the neutral point structure. The sealed gas chamber is filled with SF6 gas, and the SF6 gas is used to ensure the internal insulation performance.

[0010] Preferably, the neutral point device is provided with a ball gap adjustment structure inside. The ball gap adjustment structure includes a fixed base, which is fixedly installed inside the neutral point device by screws. A support plate is fixedly connected to the bottom of the fixed base by screws. A digital display is provided on the top of the support plate. The top of the moving part of the digital display is fixedly connected to a gap-releasing ball head by a ground connection.

[0011] Preferably, a display screen is installed on the other side of the support plate, and the display screen is electrically connected to the digital display instrument. The display screen is used to display the distance of the ball joint gap in real time.

[0012] Preferably, the connection between the middle seismic support and the lower seismic support and the neutral point equipment is made of bolts and washers. The bolts are made of CH38F steel and the washers are made of rubber to ensure good connection strength and seismic strength.

[0013] The working principle and beneficial effects of this utility model are as follows:

[0014] 1. This utility model eliminates the need for concrete foundations in the prior art by installing the neutral point device on the transformer body, thus saving civil engineering costs and improving the efficiency of installing the neutral point device. Without a separate foundation, there is no need to consider the damage to structural components caused by foundation settlement. Finally, the integrated structure has better seismic performance.

[0015] 2. This utility model seals all the structures inside metal components, making it unaffected by the external environment. It has high strength and high corrosion resistance, and the shell is well grounded, making it safe and reliable.

[0016] 3. This utility model allows workers to conveniently observe the ball head gap value by installing a digital display on the ball gap adjustment mechanism and installing a display screen connected to the digital display to display the value of the digital display in real time. Attached Figure Description

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a bottom view of the present invention;

[0020] Figure 3 For the present utility model Figure 1 Enlarged view of point A in the image;

[0021] Figure 4 This is a schematic diagram of the ball gap adjustment structure of this utility model;

[0022] Figure 5 This is a schematic diagram of the ball gap adjustment structure from another perspective of this utility model.

[0023] In the picture:

[0024] 1. Seismic expansion joint; 11. Expansion joint; 12. Connecting chain;

[0025] 2. Lower seismic bracing; 3. Middle seismic bracing; 4. Transformer; 5. Neutral point equipment; 6. Ball gap adjustment structure; 61. Fixing seat; 62. Support plate; 63. Digital display; 64. Display screen. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figures 1-5 As shown, this embodiment proposes a transformer wall-mounted neutral point device, including a transformer 4 and a neutral point device 5. The neutral point device 5 is located on one side of the transformer 4. The neutral point device 5 and the transformer 4 are connected by a seismic expansion joint 1 through screws. The seismic expansion joint 1 includes an expansion part 11 and connecting parts located on both sides of the expansion part 11. The two sides of the expansion part 11 are connected to the two connecting parts by welding. The two expansion parts 11 are connected by a connecting chain 12.

[0028] The neutral point device 5 is provided with a lower seismic support 2 at its bottom. One side of the lower seismic support 2 is fixedly connected to the transformer 4 by screws. The neutral point device 5 is provided with a middle seismic support 3 on one side. One end of the middle seismic support 3 is fixedly connected to the transformer 4 by screws.

[0029] like Figures 1-5 As shown, the neutral point device 5 has a neutral point structure inside, which is made of metal. The neutral point structure has a sealed gas chamber inside, which is filled with SF6 gas to ensure internal insulation performance.

[0030] like Figures 1-5 As shown, the neutral point device 5 is provided with a ball gap adjustment structure 6 inside. The ball gap adjustment structure 6 includes a fixed base 61. The fixed base 61 is fixedly installed inside the neutral point device 5 by screws. The bottom of the fixed base 61 is fixedly connected to a support plate 62 by screws. The top of the support plate 62 is provided with a digital display 63. The top of the moving part of the digital display 63 is fixedly connected to a gap placement ball head by a ground.

[0031] A display screen 64 is installed on the other side of the support plate 62. The display screen 64 is electrically connected to the digital display instrument 63. The display screen 64 is used to display the distance of the ball head gap in real time.

[0032] The connection between the middle seismic support 3 and the lower seismic support 2 and the neutral point device 5 is made of bolts and washers. The bolts are made of CH38F steel and the washers are made of rubber to ensure good connection strength and seismic strength.

[0033] In this embodiment, the neutral point device 5 is installed directly on the transformer 4 body without using an independent foundation. The lower seismic support 2, the middle seismic support 3, and the seismic expansion joint 1 are respectively set at the connection points. The lower seismic support 2 and the middle seismic support 3 are connected by the mounting brackets pre-set on the transformer 4 body. They are connected into one piece using high-strength bolts and rubber gaskets, which simultaneously activates the seismic resistance and support functions. This also reduces the problems caused by the use of concrete foundations in the prior art, such as high cost and time required for concrete foundation pouring.

[0034] Furthermore, the seismic expansion joint 1 is used to connect with the transformer 4 body. By setting the expansion joint 11 inside the seismic expansion joint 1, it can adjust the dimensional errors during the manufacturing and installation process and improve the seismic performance.

[0035] In addition, the discharge gap, current transformer, surge arrester, grounding switch and other components led out from the neutral point of transformer 4 are enclosed in an SF6 gas chamber. This gas chamber is made of metal structure and is reliably grounded, unaffected by the external environment, and has high strength and high corrosion resistance. Furthermore, the shell is well grounded, making it safe and reliable.

[0036] Finally, a ball gap adjustment structure is installed inside the neutral point device 5, and a display screen 64 electrically connected to the ball gap adjustment structure is installed, so that the ball head gap can be accurately displayed by the digital display instrument 63, making it convenient to observe the ball spacing.

[0037] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A transformer wall-mount neutral point device, comprising: The system includes a transformer (4) and a neutral point device (5). The neutral point device (5) is located on one side of the transformer (4). The neutral point device (5) and the transformer (4) are connected by a seismic expansion joint (1) through screws. The seismic expansion joint (1) includes an expansion part (11) and connecting parts located on both sides of the expansion part (11). The two sides of the expansion part (11) are connected by welding to the two connecting parts. The two expansion parts (11) are connected by a connecting chain (12). The neutral point device (5) is provided with a lower seismic support (2) at its bottom. One side of the lower seismic support (2) is fixedly connected to the transformer (4) by screws. The neutral point device (5) is provided with a middle seismic support (3) on one side. One end of the middle seismic support (3) is fixedly connected to the transformer (4) by screws.

2. A transformer wall bushing neutral point device according to claim 1, characterized in that, The neutral point device (5) has a neutral point structure inside. The neutral point structure is made of metal material. A sealed gas chamber is opened inside the neutral point structure. The sealed gas chamber is filled with SF6 gas. The SF6 gas is used to ensure the internal insulation performance.

3. A transformer wall bushing neutral point device according to claim 2, characterized in that, The neutral point device (5) is provided with a ball gap adjustment structure (6) inside. The ball gap adjustment structure (6) includes a fixed seat (61). The fixed seat (61) is fixedly installed inside the neutral point device (5) by screws. The bottom of the fixed seat (61) is fixedly connected to a support plate (62) by screws. The top of the support plate (62) is provided with a digital display (63). The top of the moving part of the digital display (63) is fixedly connected to a gap-releasing ball head by a ground.

4. A transformer wall bushing neutral point device according to claim 3, characterized in that, A display screen (64) is installed on the other side of the support plate (62). The display screen (64) is electrically connected to the digital display (63). The display screen (64) is used to display the distance of the ball head gap in real time.

5. A transformer wall bushing neutral point device according to claim 4, characterized in that, The connection between the middle seismic brace (3) and the lower seismic brace (2) and the neutral point device (5) is made of bolts and washers. The bolts are made of CH38F steel and the washers are made of rubber to ensure good connection strength and seismic strength.

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