Device for laying optical fibers on transformer windings

Abstract

This invention provides an apparatus for laying optical fibers on transformer windings, comprising an optical fiber winding reel, a fixing component, a guide component, a limiter component, a main frame, and a power supply component. The optical fiber is mounted on the optical fiber winding reel and passes sequentially through the limiter component, the guide component, and the fixing component. The guide component contacts the transformer winding and is used to lay the optical fiber on the transformer winding. The fixing component is used to fix the optical fiber on the transformer winding. Preferably, the limiter component includes a first limiter and a second limiter. This invention can lay and fix the optical fiber on the transformer winding, and the apparatus for laying the optical fiber has a simple structure and is easy to operate. In addition, this invention reduces the risk of the optical fiber being damaged by large lateral stress due to a single limiting action by using two limiters of different sizes before and after the first and second limiters.

Description

Technical Field

[0001] This invention relates to the field of online monitoring of transformer winding faults, specifically to an apparatus for laying optical fibers in transformer windings, particularly to an apparatus for rapidly laying optical fibers in transformer windings, and especially to an apparatus for laying optical fibers on the surface of transformer windings. Background Technology

[0002] Power transformers are among the most important and expensive pieces of equipment in a power system. Their operational status not only affects their own safety but also the stability and reliability of the entire power system. For a long time, the safe and reliable operation of power transformers has been a major concern for power operation and management departments, as it is a crucial indicator of system safety, stability, and economic operation. The complexity and diversity of transformer faults have led to increasing attention from experts and scholars both domestically and internationally to the research topic of transformer fault analysis and detection in recent years. The key lies in identifying and judging the types and locations of transformer faults.

[0003] The winding is a major component of a power transformer, forming the main body of the primary circuit. It is wound with double-insulated flat wire or enameled round wire. Its main fault phenomena include four categories: winding open circuit, winding short circuit, winding deformation, and winding overheating. In actual operation, due to the strong latent nature of early winding faults, many transformers can still operate normally even with slight displacement or deformation of the windings. However, they are essentially internally damaged, have poor short-circuit withstand capability, and may further evolve into serious faults affecting operation under short-circuit faults or external influences. Given the wide variety of transformer types and winding structures, the degree and manifestation of winding deformation after being subjected to short-circuit impacts often vary greatly.

[0004] Because optical fibers not only possess high voltage tolerance and electromagnetic interference resistance, but also offer unparalleled advantages over electrical sensors, such as long-distance transmission, distributed measurement, and the ability to monitor multiple parameters, optical fiber sensors are poised for widespread application in the future trend of intelligent power equipment. Therefore, optical fiber is one of the excellent choices for monitoring winding parameters and transmitting detection data.

[0005] However, there is currently a general lack of equipment for laying and fixing optical fibers on the surface of the winding. Summary of the Invention

[0006] In view of the deficiencies in the prior art, the purpose of this invention is to provide a device for laying optical fibers in transformer windings.

[0007] An apparatus for laying optical fibers in transformer windings according to the present invention includes:

[0008] Fiber optic winding disc, fixing components, guide components, limiter components, main frame, and power supply components;

[0009] The fiber optic winding disc, fixing components, guide components, limiter components, and power supply components are all mounted on the main frame;

[0010] The optical fiber is mounted on the optical fiber winding disc, and the optical fiber passes sequentially through the limiter assembly, the guide component, and the fixing assembly;

[0011] The guide member contacts the transformer winding and is used to lay the optical fiber on the transformer winding;

[0012] The fixing component is used to fix the optical fiber to the transformer winding.

[0013] Preferably, the fixing component includes a glue dispenser and a heating device;

[0014] The dispensing port of the glue dispenser is aligned with the optical fiber, and the heating device is used to provide heat to the glue container of the glue dispenser.

[0015] Preferably, the heating device is installed on the surface of the glue container in the glue dispenser, and the heating device is a heating wire structure.

[0016] Preferably, the mounting components also include a cooling fan;

[0017] The cooling fan is mounted on the main frame and is located downstream of the glue dispenser.

[0018] Preferably, the limiter assembly includes a first limiter and a second limiter;

[0019] Both the first limiter and the second limiter are mounted on the main frame via brackets;

[0020] The first limiter is provided with a first through hole, and the second limiter is provided with a second through hole;

[0021] The size of the first through hole is larger than the size of the second through hole;

[0022] The optical fiber passes through the first through hole and the second through hole in sequence.

[0023] Preferably, the guide is an H-shaped roller, and the position of the second through hole matches the H-shaped groove of the H-shaped roller.

[0024] Preferably, the fiber optic winding disc is detachably mounted on the main frame.

[0025] Preferably, the power supply components include a battery and / or an AC power source.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. The present invention can realize the laying and fixing of optical fibers on transformer windings, and the device for laying optical fibers has a simple structure and is easy to operate.

[0028] 2. The present invention reduces the risk of optical fiber being damaged due to large lateral stress caused by a single limiting device by using two limiting devices of different sizes, namely the first limiting device and the second limiting device. Attached Figure Description

[0029] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0030] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0031] Figure 2 This is a schematic diagram of the main structure of the present invention;

[0032] Figure 3 This is a side view of the structure of the present invention;

[0033] Figure 4 This is a schematic diagram of the rear view structure of the present invention;

[0034] Figure 5 This is a top view of the structure of the present invention;

[0035] Figure 6 This is a schematic diagram of the structure of the present invention viewed from below.

[0036] The diagram shows:

[0037] Detailed Implementation

[0038] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0039] Example 1:

[0040] The present invention provides an apparatus for laying optical fibers in transformer windings, including an optical fiber winding disc 1, a fixing component, a guide component, a limiter component 7, a main frame 8, and a power supply component 5.

[0041] The fiber optic winding reel 1, fixing assembly, guide component, limiter assembly 7, and power supply assembly 5 are all mounted on the main frame 8. The optical fiber is mounted on the fiber optic winding reel 1. Preferably, the optical fiber is mounted on the fiber optic winding reel 1 in a reel-like manner. Since the fiber optic winding reel 1 needs to be frequently disassembled to retrieve new optical fibers, the fiber optic winding reel 1 is detachably mounted on the main frame 8. In a preferred embodiment, to prevent the fiber optic laying device from causing a certain degree of tensile damage to the optical fiber during use, a damper is also installed between the fiber optic winding reel 1 and the main frame 8 to ensure that the damping between the winding reel 1 and the main frame 8 is small. The damper can be a rubber damper.

[0042] The optical fiber passes sequentially through the limiter assembly 7, the guide component, and the fixing assembly; the guide component is used to lay the optical fiber on the transformer winding; the fixing assembly is used to fix the optical fiber on the transformer winding.

[0043] The limiting device assembly 7 includes a first limiting device 71 and a second limiting device 72; both the first limiting device 71 and the second limiting device 72 are mounted on the main frame 8 via brackets; the first limiting device 71 has a first through hole, and the second limiting device 72 has a second through hole; the size of the first through hole is larger than the size of the second through hole; the optical fiber passes through the first through hole and the second through hole in sequence. The limiting device assembly 7 is used to achieve accurate positioning during installation. The first limiting device 71 is used for initial left-right positioning of the optical fiber, and the second limiting device 72 is used for secondary left-right positioning of the optical fiber to ensure that the optical fiber can match the guide component.

[0044] The guide is an H-shaped roller 6. The position of the second through hole matches the H-shaped groove of the H-shaped roller 6. In a preferred embodiment, the position of the second through hole is opposite to the H-shaped groove of the H-shaped roller 6 to ensure that the optical fiber can accurately reach the H-shaped groove of the H-shaped roller 6 after passing through the second through hole. The guide contacts the transformer winding and is used to lay the optical fiber on the transformer winding; specifically, the H-shaped roller 6 contacts the adjacent turns of the transformer winding to realize the laying of the optical fiber.

[0045] The fixing assembly includes a glue dispenser 2 and a heating device 3; the glue outlet of the glue dispenser 2 is aligned with the optical fiber, and the heating device 3 is used to provide heat to the glue container of the glue dispenser 2; specifically, the glue outlet at the bottom of the glue dispenser 2 is relatively close to the optical fiber.

[0046] The heating device 3 is installed on the surface of the glue container of the glue dispenser 2, and the heating device 3 is a heating wire structure. Specifically, the heating wire is laid circumferentially along the surface of the glue container.

[0047] The mounting assembly also includes a cooling fan 4; the cooling fan 4 is mounted on the main frame 8 and located downstream of the glue dispenser 2. In a preferred embodiment, the cooling fan 4 is an adjustable-speed cooling fan.

[0048] The power supply component 5 includes a battery and / or AC power. The power supply component 5 is electrically connected to the fixing component; specifically, it is electrically connected to the glue dispenser 2, the heating device 3, and the cooling fan 4. This power supply component 5 facilitates the flexible use of the fiber optic laying device. The power supply method of the power supply component 5 can be appropriately selected according to the site environment. It can be connected to a power source when available; if a power source is unavailable, the device contains a rechargeable battery, allowing for more flexible use of the fiber optic embedding device.

[0049] Example 2: Example 2 is a preferred example of Example 1.

[0050] A limiter assembly 7 and an H-shaped roller 6 connected to the main structure are provided on the lower front side of the main frame 8. A glue dispenser 2 and a cooling fan 4 are provided in the middle of the main frame 8. A power supply device is provided on the side of the main frame 8.

[0051] Optical fiber is a light transmission tool made of glass or plastic that uses the principle of total internal reflection to transmit light within these fibers. However, optical fibers are prone to breakage or impaired light transmission when subjected to lateral stress, requiring that large lateral stress be avoided during the transport and transfer of optical fibers. Considering the above, the optical fiber winding disc 1 of the present invention adopts a large inner diameter design. Preferably, the inner diameter of the optical fiber winding disc 1 is 25mm. The large inner diameter design can reduce the bending stress of the optical fiber; better avoid accidental breakage of the optical fiber during winding, and prevent the performance of the optical fiber from being affected by bending, thereby achieving the purpose of protecting the optical fiber; the inner diameter of the winding disc is hollow, which can make the structure lighter; the two ends of the optical fiber winding disc 1 are detachable, which facilitates multiple windings of the optical fiber in the winding disc, making it more convenient and quick to retrieve the optical fiber; that is, the optical fiber winding disc 1 can be directly clipped into the groove on the front side of the main frame 8.

[0052] The H-shaped roller 6 and the limiter assembly 7 work together to confine the optical fiber to the required position. Specifically, the limiter assembly 7 is used to confine the optical fiber to the middle position of the main structure. The H-shaped roller 6 allows the optical fiber to pass through the H-shaped groove in the middle of the roller, and also serves to limit the optical fiber's laying on the transformer winding. More specifically, the optical limiter assembly 7 includes two limiters, a first limiter 71 and a second limiter 72, of different sizes. The design of the two limiters can avoid the optical fiber from suffering large lateral stress due to a single limit. After two limiters, the optical fiber can basically reach the required position. Finally, through the cooperation of the H-shaped roller and the limiter device, the optical fiber is accurately laid in the required position.

[0053] This embodiment uses a combination of glue application and fan cooling to fix the optical fibers laid on the transformer windings. Specifically, the glue dispenser 2 dispenses glue in a timely manner, using the glue to fix the optical fibers to the winding surface; preferably, the glue is a hot melt adhesive. The glue container of the glue dispenser 2 has a large volume, which can store a certain amount of hot melt adhesive, avoiding the need to add glue on the spot during use; the surface of the glue container of the glue dispenser 2 is equipped with a heating device 3 to ensure that the hot melt adhesive is in a liquid state during use. The glue dispenser 2 is directly fixed to the main frame, and the glue outlet at the bottom is close to the optical fiber, so that the glue drips accurately onto the surface of the optical fiber.

[0054] Considering that hot melt adhesive cannot solidify quickly after heating, this invention also includes a cooling device to ensure that the optical fiber can be promptly fixed to the winding surface. The cooling fan 4 is fixed close to the adhesive container and the optical fiber. The cooling fan 4 not only cools and fixes the hot melt adhesive, allowing the optical fiber to be quickly fixed to the transformer winding, but also prevents any un-dripped hot melt adhesive from affecting the fiber. The cooling fan 4 improves the efficiency of timely curing of the hot melt adhesive, ensuring that the optical fiber can be accurately fixed in the required position. The cooling fan's power is relatively low, allowing it to be directly powered by a power supply via the switching device or by a battery, making the fiber embedding device more flexible and efficient to use.

[0055] The working principle of this invention is as follows:

[0056] In existing transformer windings, the outermost turns are separated by insulating paper, and each turn has a groove. Fiber optic cables are laid in these grooves, allowing for demodulation of different winding states based on changes in fiber optic parameters. This enables online monitoring of various transformer winding faults. However, because fiber optic cables are highly sensitive to temperature and strain, it is crucial to ensure the cables are securely fixed to the winding surface to prevent loosening from affecting the measurement of these state parameters. Therefore, it is necessary to fix the fiber optic cable to the transformer winding.

[0057] When using the device provided by this invention, an optical fiber is first drawn out from the optical fiber winding disc 1, and then passed through the first limiter 71 and the second limiter 72 in sequence to achieve initial fixation. Further, the optical fiber is restricted to the middle groove of the H-shaped roller 6. The operator places the H-shaped roller 6 on the adjacent turns of the transformer winding, and then pushes the device for laying optical fiber on the transformer winding forward. During the forward movement of the device for laying optical fiber, the optical fiber is laid on the transformer winding by the guidance of the H-shaped roller. As the device for laying optical fiber moves forward, when the optical fiber passes through the position that needs to be monitored, in order to fix it quickly and accurately, the glue dispenser 2 and the cooling fan are required to work together.

[0058] It is worth noting that the fiber winding disc 1, due to its wide width, cannot accurately position the fiber during rotation. Therefore, it is necessary to restrict the position of the fiber during use to ensure that it is accurately laid in the required location. By using two limiters of different sizes, the first limiter 71 and the second limiter 72, large lateral stress on the fiber is avoided due to a single limit. After two limiters, the fiber can basically reach the required position. Finally, the H-shaped roller 6, in conjunction with the limiter device, prevents the fiber from easily swaying left and right during laying, ensuring that the fiber is accurately laid in the required position.

[0059] After the optical fiber is laid onto the transformer winding, it needs to be fixed. Since ordinary adhesives cannot cure quickly, this can significantly affect the laying and fixing of the fiber. This invention uses hot melt adhesive, which can cure rapidly. The softening point of hot melt adhesive should generally be above 80℃, meaning that the adhesive should begin to soften and melt at 80℃. This temperature is only the melting point of the hot melt adhesive; to melt it to a degree sufficient to bond the optical fiber, the heating temperature needs to be increased to 130-180℃. Therefore, this invention equips the surface of the adhesive container 2 with a corresponding heating device 3. The heating device uses a heating wire wrapped around the outer surface of the adhesive container, and a protective sleeve is added around the heating wire to prevent overheating and potential harm to the user. The dispensing nozzle is positioned close to the optical fiber, allowing for more accurate application of the hot melt adhesive to the location where the optical fiber needs to be fixed.

[0060] This invention avoids the bending and breakage problems that easily occur during optical fiber laying. It lays and fixes the optical fiber to the transformer windings, enabling accurate monitoring and prediction of various internal transformer faults. This invention fixes the optical fiber to the transformer winding surface, facilitating convenient and timely monitoring of winding overheating, deformation, and other faults, thereby determining corresponding solutions and reducing the risk of the transformer encountering more serious failures.

[0061] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0062] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A device for laying optical fiber in a transformer winding, characterized by, The utility model relates to a kind of optical fiber laying device, including Optical fiber winding reel (1), fixed assembly, guide, stopper assembly (7), main frame (8) and power supply assembly (5); The optical fiber winding reel (1), fixed assembly, guide, stopper assembly (7) and power supply assembly (5) are all installed on the main frame (8); The optical fiber is installed on the optical fiber winding reel (1), and the optical fiber passes through stopper assembly (7), guide, fixed assembly in turn; The guide is in contact with transformer winding, for laying optical fiber on the transformer winding; The fixed assembly is used to fix the optical fiber on the transformer winding; The guide is H-shaped roller (6), and the position of the second through hole is matched with the H-shaped groove of the H-shaped roller (6). The stopper assembly (7) includes first stopper (71) and second stopper (72). The first stopper (71) and the second stopper (72) are both installed on the main frame (8) through a support. The first stopper (71) is provided with a first through hole, and the second stopper (72) is provided with a second through hole. The size of the first through hole is larger than that of the second through hole. The optical fiber passes through the first through hole and the second through hole in turn. In use, first, a fiber is drawn out from the optical fiber winding reel (1), and then passes through the first stopper (71) and the second stopper (72) in turn to obtain preliminary fixation. Further, the optical fiber is limited at the middle groove of the H-shaped roller (6), the operator places the H-shaped roller (6) on the adjacent turns of the transformer winding, and then pushes the device for laying optical fiber on the transformer winding forward. In the process of moving the device forward, the optical fiber is laid on the transformer winding by the guidance of the H-shaped roller. Through the first stopper (71) and the second stopper (72) with different sizes, the optical fiber is prevented from suffering large transverse stress due to one-time limiting. After being limited twice, the optical fiber can basically reach the required position, and finally cooperates with the H-shaped roller (6) and the limiting device. The fixed assembly includes a glue dispenser (2) and a heating device (3). The glue outlet of the glue dispenser (2) is aligned with the optical fiber, and the heating device (3) is used to provide heat for the glue container of the glue dispenser (2). The fixed assembly further includes a cooling fan (4). The cooling fan is installed on the main frame (8) and located downstream of the glue dispenser (2).

2. The device for laying optical fiber on transformer winding according to claim 1, characterized in that, The heating device (3) is installed on the surface of the glue container of the glue dispenser (2), and the heating device (3) is a heating wire structure.

3. The device for laying optical fiber on transformer winding according to claim 1, characterized in that, The optical fiber winding reel (1) is detachably installed on the main frame (8).

4. The device for laying optical fiber on transformer windings according to claim 1, characterized in that, The power supply assembly (5) includes a battery and / or an alternating current power supply.

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