Anti-loose pressing device for transformer coil
By designing an anti-loosening clamping device that includes a clamping nail, a support plate, and a spring, the problem of clamping force failure and coil displacement caused by loose clamping nails in oil-immersed power transformer coils was solved, thus achieving stable operation of the transformer and reducing costs.
Patent Information
- Application Number
- CN202520252581.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-12-30
- Estimated Expiration
- 2035-02-18
AI Technical Summary
In the existing technology, the coils of oil-immersed power transformers with voltage levels of 35kV and above are prone to failure of clamping force and coil displacement due to loosening of the clamping pins during operation, which poses a safety hazard.
A transformer coil anti-loosening clamping device is adopted, including a clamping nail, a support plate, a spring, and a clamping nail pad. The spring design maintains stable contact between the clamping nail and the pad, and the elasticity of the spring adjusts the coil fixing pressure. Combined with the fixing design of the support plate, it provides strength and stability.
It effectively prevents the pressure pins from loosening and the coils from shifting, improves the stability and reliability of the transformer, reduces safety hazards, lowers production costs, and enhances market competitiveness.
Smart Images
Figure CN223743425U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to power equipment, concretely relates to a transformer coil anti-loose compression device. BACKGROUND
[0002] It is known that for the oil-immersed power transformer coil compression mode of 35kV and above voltage grade, the nail structure is adopted, the nail pad is matched, and the nut is used to prevent loosening. When the transformer operates, the coil will vibrate due to the electric power, if the nail anti-loosening nut is not tightened, the coil will be easily loosened due to long-time vibration, thereby causing the coil compression force to be invalid, and the coil displacement causes the transformer fault. Therefore, how to solve the problem of the long-time vibration compression force invalidation and coil displacement of the transformer coil has become a research subject of the prior art. SUMMARY
[0003] In view of the problems of the coil being easily loosened, the coil compression force being invalid, and the coil displacement during the operation of the transformer, the utility model provides a transformer coil anti-loose compression device, adopts the novel anti-loose compression device, reduces the safety hazard of the transformer, reduces the product cost, improves the product quality, and enhances the product market competitiveness.
[0004] To solve the above technical problems, the utility model adopts the technical scheme of a transformer coil anti-loose compression device, which comprises a nail, a support plate, a spring, and a nail pad.
[0005] The coil of the transformer is provided with a pad block, and the nail pad is on the pad block.
[0006] The support plate is fixed on the transformer.
[0007] The utility model adopts the above technical scheme to design a transformer coil anti-loose compression device, which has the following beneficial effects:
[0008] 1. The nail pad of the utility model is located at the lower end of the support plate and is in contact with the pad block through the spring force, which not only prevents the loosening of the nail, but also effectively adjusts the fixing pressure of the coil to ensure that it is always stable during operation.
[0009] 2. Due to the design of the spring and the nail pad, the utility model can maintain stable performance even under the influence of factors such as coil vibration or temperature change. At the same time, the threaded connection of the nail and the fixed design of the support plate can provide sufficient strength and stability to reduce safety hazards.
[0010] 3. The spring is stressed and the dowel pad is pressed by screwing the dowel, so that the dowel pad always presses the cushion block, effectively preventing the dowel from loosening, the compression force from failing and the coil from shifting due to the vibration of the transformer coil, significantly reducing the safety hazards of the transformer, improving the reliability and stability of the product, and ensuring the market competitiveness of the product. BRIEF DESCRIPTION OF DRAWINGS
[0011] Figure 1 The structure of the utility model is shown in the figure.
[0012] Figure 2 The application structure of the utility model is shown in the figure. DETAILED DESCRIPTION
[0013] The transformer coil anti-loosening compression device of the utility model will be described in detail below with reference to the accompanying drawings.
[0014] The transformer coil anti-loosening compression device of the utility model, referring to Figure 1 and Figure 2 , comprises a dowel 1, a support plate 2, a spring 3 and a dowel pad 4. The support plate 2 is fixed on the transformer, and should have sufficient strength and rigidity to withstand the vibration and pressure of the coil 6. The dowel 1 is made of a 42mm diameter round steel that is hot-rolled and then cold-drawn or cold-worked. The dowel 1 has an external thread structure, the support plate 2 is drilled and tapped, and the dowel 1 is threaded through the hole of the support plate 2. The lower end of the dowel 1 is connected to the dowel pad 4. The spring 3 is sleeved on the dowel 1. The material of the spring 3 should be high-strength, corrosion-resistant and elastic. One end of the spring 3 is connected to the lower bottom of the support plate 2, and the other end of the spring 3 is connected to the dowel pad 4. The spring 3 is made of appropriate spring material (such as carbon steel or stainless steel), and the diameter and free length of the spring 3 are determined according to the design requirements.
[0015] The utility model is provided with a cushion block 5 on the coil 6 of the transformer. The cushion block 5 should have sufficient strength and rigidity to withstand the vibration of the coil 6. The dowel pad 4 is pressed against the cushion block 5. By tightening the dowel 1, the dowel pad 4 is pressed tightly, and the spring 3 is stressed. The dowel pad 4 always presses the cushion block 5, and the coil 6 is compressed tightly. This solves the problems of dowel loosening, coil compression force failure and coil displacement caused by the electric power of the coil during the operation of the transformer.
[0016] After installation, the device needs to be checked, including whether the threaded connection of the dowel 1 is stable, whether the spring 3 is working normally, and whether the cushion block 5 is firmly fixed. If necessary, the length or position of the dowel 1 can be adjusted to ensure the best performance.
[0017] The utility model is suitable for 35kV and above voltage grade oil -immersed power transformer, especially in need bearing coil vibration and temperature change's operating environment. Through this way, not only can effectively prevent the coil displacement and compression force invalidation problem caused by the nail loosening, still can reduce production cost and enhance market competitiveness while improving product stability and reliability.
[0018] The utility model discloses after the periodical use, should check the thread connection of nail whether loosens, whether spring exists fatigue or damage and whether the pad of nail has the sign of wearing. If necessary, can carry out the proper adjustment or replacement parts to the device to ensure its long -term stable operation.
Claims
1. A transformer coil anti-loose compression device, comprising a compression nail, a support plate, a spring, a compression nail pad, characterized in that The pressing nail passes through the supporting plate and is screwed with the supporting plate, the lower end of the pressing nail is connected with the pressing nail pad, a spring is sleeved on the pressing nail, one end of the spring is connected with the lower bottom of the supporting plate, and the other end of the spring is connected with the pressing nail pad.
2. The transformer coil anti-loose compression device according to claim 1, characterized in that The coil of the transformer is provided with a pad block, and the pressing nail pad is placed on the pad block.
3. The transformer coil anti-loose compression device according to claim 1, characterized in that The supporting plate is fixed on the transformer.