CN107578902A - A method for wiring optical fibers inside a transformer - Google Patents

Abstract

The invention discloses a wiring method of an optical fiber inside a transformer, comprising the following steps: A, calculating the total length of the wiring of the optical fiber; B, installing a bracket on the insulating paper of the transformer winding; C, passing the optical fiber into the transformer, from Pass on the bracket; the initial penetration angle of the optical fiber is the same as the winding direction of the winding wire at the penetration position, and as the penetration length of the optical fiber increases, the wiring angle of the optical fiber changes synchronously; D. After the optical fiber penetrates, the Paste several insulating tapes between the insulating papers to initially fix the optical fiber; E, adjust the winding tension of the optical fiber, so that the deviation rate of the winding tension of each part of the optical fiber and the set standard value is less than or equal to 5%; F, winding After the tension is adjusted, the fiber is fixed with an adhesive. The invention can improve the deficiencies of the prior art, and improves the distribution uniformity of the winding tension of the optical fiber arranged inside the transformer.

Description

A method for wiring optical fibers inside a transformer

technical field

The invention relates to the technical field of transformer assembly, in particular to a method for wiring optical fibers inside a transformer.

Background technique

Under normal working conditions, due to the resistance of the coil used, the transformer will generate and accumulate heat during operation. If the heat cannot be removed as soon as possible, it will cause damage to the transformer itself and endanger the normal operation of the power grid. In the process of transformer temperature control, the first step is to detect the temperature of the transformer. Due to strong electromagnetic interference inside the transformer, an optical fiber temperature sensor is usually used to monitor the temperature inside the transformer in real time. When arranging the fiber optic temperature sensor, the quality of the fiber optic wiring directly affects the service life of the fiber optic temperature sensor.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for wiring optical fibers inside a transformer, which can solve the deficiencies of the prior art and improve the uniformity of winding tension distribution of optical fibers arranged inside the transformer.

In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows.

A method for wiring optical fibers inside a transformer, comprising the following steps:

A. Calculate the total length of the optical fiber wiring, the actual length of the optical fiber is reserved 0.5-1m more than the total length of the redundant amount of wiring;

B. Install the bracket on the insulating paper of the transformer winding;

C. Thread the optical fiber into the transformer and pass through the bracket; the initial penetration angle of the optical fiber is the same as the winding direction of the winding wire at the penetration position. As the penetration length of the optical fiber increases, the wiring angle of the optical fiber changes synchronously.

Where α is the routing angle of the optical fiber, β is the angle between the winding wire at the optical fiber routing position and the horizontal plane, R is the routing length of the optical fiber, L is the straight-line distance between the optical fiber routing position and the initial penetration point of the optical fiber, and k is the ratio coefficient;

D. After the optical fiber is penetrated, paste several insulating tapes between the optical fiber and the insulating paper to initially fix the optical fiber;

E. Adjust the winding tension of the optical fiber so that the deviation rate between the winding tension of each part of the optical fiber and the set standard value is less than or equal to 5%;

F. After the winding tension is adjusted, use adhesive to fix the optical fiber.

Preferably, in step B, the central angle formed by two adjacent brackets relative to the transformer winding axis is greater than 45° and less than or equal to 90°.

Preferably, the height of the bracket is proportional to the angle between the optical fiber and the winding wire at the installation position of the bracket.

As preferably, in step C,

Wherein, R is the routing length of the optical fiber, and D is the straight-line distance between the optical fiber routing position and the nearest bracket.

Preferably, in step D, the distance between the insulating tape and the bracket is greater than or equal to 20 cm.

Preferably, in step E, the adjustment is started from the point where the deviation rate of the optical fiber winding tension and the set standard value is the smallest, and simultaneously extends to both ends of the optical fiber; during the adjustment process, the optical fiber is changed by changing the axial position and radial height of the optical fiber winding tension.

Preferably, when adjusting the winding tension at any point of the optical fiber, the insulating tapes on both sides of the adjustment point are removed.

Preferably, in step F, when using an adhesive to fix the optical fiber, both sides of the optical fiber are fixed to the insulating paper, and a gap remains between the fixed contact surfaces on both sides of the optical fiber.

The beneficial effect brought about by adopting the above technical solution is that the present invention avoids the problem of excessive local stress of the optical fiber by rationally arranging the optical fiber. The bracket can improve the stability of the winding tension of the optical fiber itself during the wiring process. During the process of adjusting the winding tension, the two-way synchronous adjustment of the optical fiber can reduce the interference to the entire optical fiber during the adjustment process. The invention can effectively improve the force uniformity of the optical fiber wiring inside the transformer, and effectively protect the optical fiber.

Description of drawings

Fig. 1 is a hardware structural diagram of a specific embodiment of the present invention.

In the figure: 1. Main body; 2. First spring body; 3. First arc-shaped support; 4. Second spring body; 5. Second arc-shaped support; 6. Rubber sleeve.

detailed description

The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

A specific embodiment of the present invention comprises the following steps:

A. Calculate the total length of the optical fiber wiring, the actual length of the optical fiber is reserved 0.5-1m more than the total length of the redundant amount of wiring;

B. Install the bracket on the insulating paper of the transformer winding;

C. Thread the optical fiber into the transformer and pass through the bracket; the initial penetration angle of the optical fiber is the same as the winding direction of the winding wire at the penetration position. As the penetration length of the optical fiber increases, the wiring angle of the optical fiber changes synchronously.

Where α is the routing angle of the optical fiber, β is the angle between the winding wire at the optical fiber routing position and the horizontal plane, R is the routing length of the optical fiber, L is the straight-line distance between the optical fiber routing position and the initial penetration point of the optical fiber, and k is the ratio coefficient;

D. After the optical fiber is penetrated, paste several insulating tapes between the optical fiber and the insulating paper to initially fix the optical fiber;

E. Adjust the winding tension of the optical fiber so that the deviation rate between the winding tension of each part of the optical fiber and the set standard value is less than or equal to 5%;

F. After the winding tension is adjusted, use adhesive to fix the optical fiber.

In step B, the central angle formed by two adjacent brackets relative to the axis of the transformer winding is greater than 45° and less than or equal to 90°.

The height of the bracket is proportional to the angle between the optical fiber and the winding wire at the installation position of the bracket.

In step C,

Wherein, R is the routing length of the optical fiber, and D is the straight-line distance between the optical fiber routing position and the nearest bracket.

In step D, the distance between the insulating tape and the bracket is greater than or equal to 20 cm.

In step E, the adjustment is started from the point where the deviation rate between the fiber winding tension and the set standard value is the smallest, and at the same time it is extended to both ends of the fiber; during the adjustment process, the winding tension of the fiber is changed by changing the axial position and radial height of the fiber .

When adjusting the winding tension at any point of the optical fiber, remove the insulating tape on both sides of the adjustment point.

In step F, when using an adhesive to fix the optical fiber, the two sides of the optical fiber are fixed with the insulating paper, and there is a gap between the fixed contact surfaces on both sides of the optical fiber.

In actual work, the inventor has further improved the structure of the bracket, as shown in FIG. 1 .

The bracket includes a main body 1, the two ends of the main body 1 are respectively fixed with the first spring body 2 and the second spring body 4 arranged longitudinally, and the tops of the first spring body 2 and the second spring body 4 are respectively pivotally connected with a first arc-shaped bracket 3 and the second arc-shaped bracket 5, the middle of the main body 1 is fixed with a rubber sleeve 6 arranged horizontally. When laying the optical fiber, the optical fiber passes through the surface of the first arc-shaped bracket 3 and the second arc-shaped bracket 5, and passes through the rubber sleeve 6 at the same time, and the optical fiber and the rubber sleeve 6 are interference fit. The structure of the bracket can improve the force uniformity of the optical fiber across the front and rear parts of the bracket. At the same time, when adjusting the winding tension of the optical fiber, the bracket can fix the adjustment part to reduce the interference to the rest adjustment parts.

In describing the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", The orientations or positional relationships indicated by "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention, rather than indicating or It should not be construed as limiting the invention by implying that a referenced device or element must have a particular orientation, be constructed, and operate in a particular orientation.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. a kind of optical fiber is in the wiring method of inside transformer, it is characterised in that comprises the following steps：

A, the wiring total length of optical fiber is calculated, the physical length of optical fiber retains the amount of redundancy of 0.5~1m more than wiring total length；

B, the mounting bracket on the insulating paper of Transformer Winding；

C, optical fiber is penetrated in transformer, passed through from bracket；The initial of optical fiber penetrates angle and penetrates the winding conducting wire of position Winding direction it is identical, as optical fiber penetrates the increase of length, the angle of lay of optical fiber synchronously changes,

<mrow> <mi>&amp;alpha;</mi> <mo>=</mo> <msup> <mi>tan</mi> <mrow> <mo>-</mo> <mn>1</mn> </mrow> </msup> <mrow> <mo>(</mo> <mfrac> <mrow> <mi>k</mi> <mo>&amp;times;</mo> <mi>R</mi> </mrow> <mi>L</mi> </mfrac> <mo>&amp;times;</mo> <mi>tan</mi> <mi>&amp;beta;</mi> <mo>)</mo> </mrow> <mo>,</mo> </mrow>

Wherein α is the angle of lay of optical fiber, and β is the winding conducting wire of optical fiber wire location and the angle of horizontal plane, and R is the cloth of optical fiber Line length, air line distances of the L between optical fiber wire location and the initial point of entrance of optical fiber, k is proportionality coefficient；

D, after optical fiber penetrates, several insulating tapes are bonded between optical fiber and insulating paper, optical fiber are carried out tentatively fixed；

E, the winding tension of optical fiber is adjusted, the winding tension and the deviation ratio of established standardses value for making each position of optical fiber are less than Equal to 5%；

F, after winding tension regulation, optical fiber is fixed using adhesive.

2. optical fiber according to claim 1 is in the wiring method of inside transformer, it is characterised in that：In step B, adjacent two The central angle that individual bracket forms relative to Transformer Winding axle center is more than 45 °, and less than or equal to 90 °.

3. optical fiber according to claim 2 is in the wiring method of inside transformer, it is characterised in that：The height and support of bracket Angle between frame installation site optical fiber and winding conducting wire is directly proportional.

4. optical fiber according to claim 1 is in the wiring method of inside transformer, it is characterised in that：In step C,

<mrow> <mi>k</mi> <mo>=</mo> <msqrt> <mfrac> <mi>D</mi> <mi>R</mi> </mfrac> </msqrt> <mo>,</mo> </mrow>

Wherein, R is the length of arrangement wire of optical fiber, and D is the air line distance of optical fiber wire location and the bracket away from its nearest neighbours.

5. optical fiber according to claim 1 is in the wiring method of inside transformer, it is characterised in that：In step D, insulating cement The distance of band and bracket is more than or equal to 20cm.

6. optical fiber according to claim 1 is in the wiring method of inside transformer, it is characterised in that：In step E, from optical fiber The winding tension point minimum with the deviation ratio of established standardses value starts to adjust, while extends to optical fiber both ends；During regulation, lead to The axial location for changing optical fiber and radial height are crossed to change the winding tension of optical fiber.

7. optical fiber according to claim 6 is in the wiring method of inside transformer, it is characterised in that：Any one to optical fiber When place is wound tension adjustment, the insulating tape of both sides at regulation is removed.

8. optical fiber according to claim 1 is in the wiring method of inside transformer, it is characterised in that：In step F, using viscous When optical fiber is fixed mixture, the both sides of optical fiber are fixed with insulating paper, protected between the fixation contact surface of optical fiber both sides Leave space.