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Integral molding process of transformer oil conservator capsule

A technology of integral molding and molding process, which is applied to household appliances, other household appliances, household components, etc., can solve the problem that the chemical properties and physical size consistency of the adhesive tape cannot be effectively guaranteed, the consistency of the capsule and the long-term operation reliability are affected, and the capsule is affected. Air tightness and pressure resistance performance, etc., to ensure consistency and long-term operation reliability, eliminate hidden dangers of pollution, and uniform pressure

Active Publication Date: 2019-01-18
南通世睿电力科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, there are still some disadvantages in this preparation method: 1. Although the adhesive strength of the coating layer is improved through the single-side coating and single-side calendering process, it cannot effectively ensure the consistency of the chemical properties and physical dimensions of the adhesive tape, which will affect the capsule. The consistency of post-production and long-term operation reliability; 2. In this preparation process, the laminated adhesive tape is rolled and pressed in one direction by the pressure roller, and the pressure is unidirectionally pressed. There is a height difference in the pressure, which makes the force on the upper and lower adhesive tape uneven In turn, it affects the compactness of the upper and lower adhesive tapes; 3. The molded semi-finished capsule is vulcanized at low pressure to form a finished capsule. However, due to the low pressure during vulcanization, the pressure is not enough, which affects the lap strength between the upper and lower adhesive tapes. In turn, it will affect the airtightness and pressure resistance of the capsule; 4. Before the vulcanization begins, the folded part is isolated by talc powder, and the powdery isolation agent will pollute the interior of the capsule, which in turn will pollute the transformer oil

Method used

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  • Integral molding process of transformer oil conservator capsule
  • Integral molding process of transformer oil conservator capsule
  • Integral molding process of transformer oil conservator capsule

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In this embodiment, the specification is 234×124mm. The overall molding process of the transformer oil conservator capsule is changed from the production process of single-sided calendered adhesive tape to the production process of double-sided calendered adhesive tape, and the molding and vulcanization are combined. The specific steps are as follows:

[0025] (1) Preparation of the first rubber material and the second rubber material: Roughly knead the mixed gel A on the open mixer, and then refine it to make it fully mixed evenly and remove air bubbles, and then make small rolls. Form the first rubber material of the whole roll; roughen the mixed gel B on the open mill first, and then refine it to make it fully mixed evenly and remove air bubbles, and then make small rolls to form the first rubber material of the whole roll. Two rubber materials;

[0026] (2) Double-sided calendering:

[0027] The first step is to carry out front calendering of the base fabric, put t...

Embodiment 2

[0039] Compared with Embodiment 1, this embodiment changes the size of the capsule of the transformer oil conservator to 306×254 mm, and its overall molding process remains unchanged.

[0040] In order to compare the performance of the capsule product of transformer oil conservator in this example, it was compared with the capsule product of transformer oil conservator of the same specification prepared by three manufacturers in the market. The comparison results are shown in Table 2:

[0041]

[0042] Note: For the air tightness test, slowly fill the capsule with compressed air at room temperature and in an unconstrained state, park it for 20 minutes to stabilize the pressure to 1.0KPa±0.01 KPa, soak it in water or apply soapy water on its surface, and observe whether there is any bubble.

[0043] It can be seen from the above table that through the implementation method of this example, the comprehensive performance of the prepared transformer oil conservator capsule prod...

Embodiment 3

[0045] Compared with Embodiment 1, this embodiment changes the size of the capsule of the transformer oil conservator to 228×114 mm, and its overall molding process remains unchanged.

[0046] In order to compare the performance of the capsule product of transformer oil conservator in this example, it was compared with the capsule product of transformer oil conservator of the same specification prepared by three manufacturers in the market. The comparison results are shown in Table 3:

[0047]

[0048] Note: For the air tightness test, slowly fill the capsule with compressed air at room temperature and in an unconstrained state, park it for 20 minutes to stabilize the pressure to 1.0KPa±0.01 KPa, soak it in water or apply soapy water on its surface, and observe whether there is any bubble.

[0049] It can be seen from the above table that through the implementation method of this example, the comprehensive performance of the prepared transformer oil conservator capsule prod...

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Abstract

The invention relates to an integrated forming technology of an oil conservator rubber capsule of a transformer. According to the integrated forming technology of the oil conservator rubber capsule of the transformer, a rubberized fabric one-faced rolling production technology is changed into a rubberized fabric double-faced rolling production technology, and forming and vulcanization are combined; after vulcanization is ended, an upper cushion fabric, a lower cushion fabric and the rubber capsule between the upper cushion fabric and the lower cushion fabric are moved out, and the upper cushion fabric and the lower cushion fabric are separated from the rubber capsule within 5 min, and then the rubber capsule product is obtained. The integrated forming technology of the oil conservator rubber capsule of the transformer has the advantages that the rubberized fabric one-faced rolling production technology is changed into the rubberized fabric double-faced rolling production technology, so that the adhesion strength of a coating layer is improved, and the consistency of the chemical performance and the physical dimension of rubberized fabrics is effectively guaranteed; meanwhile, forming and vulcanization are combined, so that the lap joint strength between an upper rubberized fabric and a lower rubberized fabric is improved, and therefore the air tightness and the pressure-resistance performance of the rubber capsule are improved; and a lower rubber plate is arranged under the lower cushion fabric, an upper rubber plate is arranged on the upper cushion fabric, and therefore it is guaranteed that the hot-press formed rubber capsule can be tightly pressed by a vulcanization hot-press forming machine and the rubber capsule is evenly pressed; and in this way, the rubber capsule is not prone to deformation, and the quality of the rubber capsule product is greatly improved.

Description

technical field [0001] The invention belongs to the manufacturing technology of transformers, and relates to a manufacturing process of transformer accessories. [0002] In particular, it relates to an integral molding process of a transformer oil conservator capsule. Background technique [0003] Transformer oil conservator capsule, also known as rubber diaphragm, is a rubber industrial product with various specifications or models, which is widely used in power system transformers. Transformer oil conservator capsule, the inside of the capsule is in contact with the atmosphere through the breathing tube and moisture absorber, and the outside of the capsule is in contact with the transformer oil. When the oil in the transformer oil tank expands or contracts, causing the oil level of the oil conservator to rise or fall, the soft airbag is exhausted outward. Or inhale by itself to balance the pressure inside and outside the soft air bag, and play a breathing role, so as to c...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C69/00B29C43/24B29C35/02B29L31/34
CPCB29C35/02B29C43/24B29C69/00B29C69/001B29L2031/34
Inventor 马小兵
Owner 南通世睿电力科技有限公司
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