Current transformer mounting structure for transformer

Abstract

The utility model discloses a current transformer installation structure for a transformer, which relates to the technical field of transformers, and comprises a base welded at the port of a transformer box body, an installation flange is arranged on the base, the installation flange is fixedly sealed on the base through a plurality of fastening bolts, and a support plate is arranged at the lower part of the installation flange. The supporting plate is connected to the lower portion of the mounting flange through a plurality of tensioning screws, the current transformer is arranged in a cavity of the supporting plate and the mounting flange, a groove hole where the sleeve is embedded is formed in the center of the mounting flange, the sleeve is fixedly sealed on the mounting flange through a plurality of mounting bolts, and the current transformer is arranged in a transformer box through the mounting flange. The internal space of the transformer box body is utilized, a mutual inductor ascending flanged base does not need to be specially machined, cost is saved, the sealing number and the bonding wire length are reduced, the oil leakage probability of the transformer is reduced, the structure is simple, firm and stable, and safe operation of an electric power system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to a current transformer installation structure for transformers. Background Art

[0002] Intelligent substations utilize advanced, reliable, integrated, low-carbon, and environmentally friendly intelligent equipment. They are based on the fundamental requirements of intelligent station-wide information, a networked information platform, and standardized information sharing. They automatically complete basic functions such as information collection, measurement, control, protection, metering, and monitoring. They can also support advanced functions such as real-time automatic grid control, intelligent regulation, online analysis and decision-making, and collaborative interaction as needed. Instrument transformers are key measuring components in intelligent grids, crucial for grid protection and energy metering. Bushing-type current transformers are essential electrical components in high-voltage power transformers. They monitor and measure the operation of power equipment, converting high currents in the primary system into proportionally smaller currents for use by measuring instruments and protection devices.

[0003] Patent application number CN214588336U discloses a transformer fastening structure for a horizontally mounted transformer bushing on a raised stand. The structure comprises a raised stand and a transformer housed within the raised stand. The structure is characterized by an upper laminated wooden support plate positioned above the transformer and a lower laminated wooden support plate positioned below the transformer. The upper and lower laminated wooden support plates are each provided with a plurality of grooves on their outer sides, arc grooves on their inner sides, and notches on the edges of the upper laminated wooden support plate, enhancing the stability and reliability of the transformer within the raised stand. However, conventional practice involves installing a bushing-type current transformer within the raised stand, installing a bushing on the raised stand, surrounding the transformer within the oil-filled portion of the bushing, and sealing the raised stand from the transformer cover. This makes the raised stand difficult to manufacture and requires numerous welds. Furthermore, the seals between the raised stand and the transformer cover and the bushing increase, making it prone to leaks. Utility Model Content

[0004] In order to overcome the defects of the prior art current transformer installation such as many welding wires, many seals and easy leakage, the utility model provides a current transformer installation structure for a transformer.

[0005] The technical solution adopted by the utility model to solve its technical problems is: a current transformer mounting structure for a transformer, comprising a base welded at the port of the transformer box, a mounting flange being provided on the base, the mounting flange being fixed and sealed on the base by a plurality of fastening bolts, a supporting plate being provided at the lower part of the mounting flange, the supporting plate being connected to the lower part of the mounting flange by a plurality of tightening screws, the current transformer being arranged in the cavity of the supporting plate and the mounting flange, a slot for embedding a sleeve being provided at the center of the mounting flange, and the sleeve being fixed and sealed on the mounting flange by a plurality of mounting bolts.

[0006] As a further improvement of the present invention, a junction box for connecting the current transformer is provided on the side of the transformer box.

[0007] As a further improvement of the present invention, a first sealing ring is provided between the base and the mounting flange.

[0008] As a further improvement of the present invention, a second sealing ring is provided between the mounting flange and the flange of the sleeve.

[0009] As a further improvement of the present invention, grooves for engaging the sealing ring are provided on the base, the mounting flange and the flange of the sleeve.

[0010] As a further improvement of the present invention, the slotted hole is a hole platform slot that can match the supporting sleeve.

[0011] Compared with the prior art, the present invention has the following beneficial effects: in this solution, the current transformer is set in the transformer box by installing the flange, and the internal space of the transformer box is utilized. There is no need to specially process the transformer riser, which saves costs, reduces the number of seals and the length of welding wires, and reduces the probability of transformer oil leakage. The structure is simple, reliable and stable, ensuring the safe operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0013] Figure 1 The utility model is a structural schematic diagram of a current transformer installation structure for a transformer.

[0014] In the figure: 1. Transformer box; 2. Base; 3. Mounting flange; 4. Fastening bolts; 5. Bushing; 6. Current transformer; 7. Mounting bolts; 8. Support plate; 9. Tensioning screw; 10. Junction box; 11. First sealing ring; 12. Second sealing ring. DETAILED DESCRIPTION

[0015] In order to make the technical solution and beneficial effects of the present invention more clearly understood, the present invention will be further described in detail below with reference to specific embodiments.

[0016] Reference Figure 1The embodiment of the utility model discloses a current transformer mounting structure for a transformer, including a base 2 welded at the port of a transformer box 1, a mounting flange 3 provided on the base 2, the mounting flange 3 is fixed and sealed on the base 2 by a plurality of fastening bolts 4, a support plate 8 is provided at the lower part of the mounting flange 3, the support plate 8 is connected to the lower part of the mounting flange 3 by a plurality of tightening screws 9, a current transformer 6 is arranged in the cavity of the support plate 8 and the mounting flange 3, a slot for embedding a sleeve 5 is provided at the center of the mounting flange 3, the sleeve 5 is fixed and sealed on the mounting flange 3 by a plurality of mounting bolts 7, and a junction box 10 connected to the current transformer 6 is provided on the side of the transformer box 1.

[0017] Among them, the slot is a hole platform slot that can match the support sleeve 5. It can play the role of bearing the sleeve 5, making the sleeve 5 more stable.

[0018] During use, the base 2 is first welded to the end of the transformer housing 1. A support plate 8 is provided below the mounting flange 3, which is connected to the lower portion of the mounting flange 3 via several tightening screws 9. The current transformer 6 is placed in the cavity between the support plate 8 and the mounting flange 3. The mounting flange 3 is fixed and sealed to the base 2 via several fastening bolts 4. The sleeve 5 is embedded in the slot of the mounting flange 3 and secured with mounting bolts 7. The current transformer 6 is placed in the transformer housing 1 via the mounting flange 3, eliminating the need for a separate riser. This reduces the number of seals, weld wire length, and the chance of transformer oil leakage. This simpler, more reliable, and more stable fixing method ensures the safe operation of the power system.

[0019] A first sealing ring 11 is provided between the base 2 and the mounting flange 3. A second sealing ring 12 is provided between the mounting flange 3 and the flange of the sleeve 5. Grooves for fitting the sealing rings are provided on the base 2, the mounting flange 3, and the flange of the sleeve 5, thereby improving the sealing performance.

[0020] It should be understood that the specific embodiments described herein are only used to understand the present invention and are not used to limit the present invention. All other embodiments obtained by those skilled in the art without making any creative work are within the scope of protection of the present invention.

Claims

1. A current transformer mounting structure for a transformer, characterized in that: The invention comprises a base (2) welded to the port of a transformer box (1), a mounting flange (3) being provided on the base (2), the mounting flange (3) being fixed and sealed on the base (2) by a plurality of fastening bolts (4), a supporting plate (8) being provided at the lower part of the mounting flange (3), the supporting plate (8) being connected to the lower part of the mounting flange (3) by a plurality of tightening screws (9), a current transformer (6) being arranged in the cavity between the supporting plate (8) and the mounting flange (3), a slot for embedding a sleeve (5) being provided at the center of the mounting flange (3), and the sleeve (5) being fixed and sealed on the mounting flange (3) by a plurality of mounting bolts (7).

2. A current transformer mounting structure for a transformer according to claim 1, characterized in that: A junction box (10) connected to a current transformer (6) is provided on the side of the transformer box (1).

3. The current transformer mounting structure for a transformer according to claim 2, characterized in that: A first sealing ring (11) is provided between the base (2) and the mounting flange (3).

4. A current transformer mounting structure for a transformer according to claim 3, characterized in that: A second sealing ring (12) is provided between the mounting flange (3) and the flange of the sleeve (5).

5. The current transformer mounting structure for a transformer according to claim 4, characterized in that: The base (2), the mounting flange (3) and the flange of the sleeve (5) are all provided with grooves for engaging the sealing ring.

6. The current transformer mounting structure for a transformer according to claim 5, characterized in that: The slotted hole is a hole platform slot that can match the supporting sleeve (5).

Images