Fixing and rotating wheel structure of transformer temperature measurement optical fiber cable and installation method

Abstract

The invention relates to a fixing and rotating wheel structure of a transformer temperature measurement optical fiber cable and an installation method, a fixing frame is fixedly arranged on the upper side of a corresponding transformer body, U-shaped clamping pieces are arranged on the fixing frame, an optical fiber fixing plate is supported by the U-shaped clamping pieces, an optical fiber penetrating flange plate is arranged on the box wall of a transformer, and the optical fiber penetrating flange plate is fixedly connected with the transformer body. A rotating wheel assembly is arranged at the end, close to the optical fiber penetrating flange plate, of the optical fiber fixing plate and comprises a rotating wheel disc and a rotating shaft, the rotating wheel disc rotationally sleeves the rotating shaft, limiting discs are arranged on the two sides of the rotating wheel disc, and the rotating shaft is sleeved with the limiting discs in a threaded mode. The optical fiber cable is led out from the optical fiber penetrating flange plate, then wound on the rotating wheel disc, limited by the limiting discs on the two sides and then led out and fixed to the optical fiber fixing plate, and the diameter of the rotating wheel disc is larger than the allowed minimum bending radius of the optical fiber cable. The optical fiber can be flexibly arranged and adjusted according to the layout condition of the optical fiber probe, so that the problems of falling of the optical fiber, overlarge bending degree of the optical fiber and the like can be avoided.

Description

Technical Field

[0001] This invention relates to the field of transformer fiber optic temperature measurement technology, specifically to a fixing and rotating structure and installation method for a transformer temperature measurement fiber optic cable. Background Technology

[0002] The fiber optic temperature measurement system for transformers utilizes temperature sensors (probes) embedded in the windings, core, oil level, and other locations to measure the temperature at monitoring points. The sensors transmit signals to measuring instruments via optical fibers. Fiber optic probes are typically embedded between the coil conductors in the transformer body or in components such as the yoke or clamps on the core. The main unit of the fiber optic temperature measurement device is usually mounted outside the transformer, which raises the issue of fiber optic cabling and connection. Current technology typically involves welding a fiber optic through-flange onto the tank wall, with the fiber optic cable running from the transformer body to the through-flange, and then connecting to the main unit via an external fiber optic cable. However, fiber optic cables are very fragile and cannot withstand external pressure, impacts, or have excessively small bending radii. Furthermore, special care must be taken during fiber optic cabling. The cable path must have a structure to secure and bind the fiber; otherwise, excessive length can lead to sagging and damage. Additionally, bending must be avoided, as excessive bending or bending radii less than the minimum allowable radius can easily cause fiber breakage.

[0003] Currently, an increasing number of transformer products require fiber optic temperature measurement systems. However, fiber optic manufacturers typically produce fibers with fixed lengths, making it difficult to accurately calculate the required fiber optic cable length from the pre-embedded location of the fiber optic probe to the fiber optic through-flange. Since fiber optic cables are usually purchased in advance based on production schedules, this often results in cables that are significantly longer than actually needed. Furthermore, factors such as the lack of wiring and fixing brackets for fiber optic temperature measurement in the design, and the absence of instructions for workers on how to handle excessively long fibers, frequently lead to situations during production where excessively long fibers sag or bend excessively during bundling. This can result in the fiber optic cable not displaying a temperature reading or displaying an abnormal temperature after product assembly. All of these situations cause rework of the transformer body, delaying production.

[0004] Existing transformer fiber optic installation structures typically only consider the fixing of the fiber optic cable, neglecting the adjustment of the fiber optic length. For example, patent CN217878072U discloses a fiber optic installation structure suitable for a transformer fiber optic temperature measurement system, which includes mounting plates on both sides of the iron core, a temperature-sensing fiber, insulation components, and insulation blocks. This structure also includes a fiber optic pass-through disk, with the end of the temperature-sensing fiber optic cable away from the probe fixed to the pass-through disk. Patent CN110793664B discloses a method for installing and arranging multi-parameter sensing transformer fiber optic sensors, primarily addressing the coordinated arrangement of various fiber optic sensors. However, neither of these structures considers the issue of fiber optic length adjustment when the fiber optic cable length is significantly longer than required, easily leading to problems such as fiber sag and excessive fiber bending. Summary of the Invention

[0005] The purpose of this invention is to provide a fixing and rotating structure and installation method for a transformer temperature measuring fiber optic cable, which can flexibly arrange and adjust the fiber optic cable according to the layout of the fiber optic probe, thereby avoiding problems such as fiber optic cable drooping and excessive fiber optic cable bending.

[0006] The objective of this invention is achieved through the following technical solution: A fixing and rotating structure for a transformer temperature-sensing fiber optic cable includes a fiber optic fixing plate, a fixing frame, and a rotating assembly. The fixing frame is fixed to the upper side of the transformer body and is equipped with U-shaped clamps. The fiber optic fixing plate is supported by the U-shaped clamps. A fiber optic through-flange is provided on the transformer tank wall, and a rotating assembly is provided at one end of the fiber optic fixing plate near the fiber optic through-flange. The rotating assembly includes a rotating disk and a rotating shaft. The rotating disk is rotatably mounted on the rotating shaft. Limiting disks are provided on both sides of the rotating disk, and the limiting disks are threaded onto the rotating shaft. After the fiber optic cable is led out from the fiber optic through-flange, it is first wound around the rotating disk and limited by the limiting disks on both sides, and then led out and fixed on the fiber optic fixing plate. The diameter of the rotating disk is larger than the minimum allowable bending radius of the fiber optic cable.

[0007] The rotating shaft is threaded with multiple limiting nuts, and the outer side of the limiting plate is in contact with the corresponding limiting nuts.

[0008] The transformer body has a connecting busbar at the upper end, and the fixing bracket is mounted on the corresponding connecting busbar. The fixing bracket has a clamping opening at the rear end, and an opening connecting plate is provided at the upper end of the clamping opening. The connecting busbar is placed in the clamping opening.

[0009] The rotating shaft is mounted on a rotating wheel mounting frame. The upper clamping end and the lower clamping end of the transformer core are connected by a clamping end connecting plate, and the rotating wheel mounting frame is fixed to the clamping end connecting plate.

[0010] The mating ends of two adjacent fiber optic fixing plates are provided with openings, and the mating ends of the two fiber optic fixing plates are connected by binding with cloth tape through the holes.

[0011] A method for fixing the transformer temperature-measuring fiber optic cable and installing the rotating wheel structure includes the following steps: Step 1: Determine the layout of the fiber optic probe on the transformer; Step 2: Determine the total length and number of fiber optic mounting plates and the number of mounting brackets based on the layout of the fiber optic probes on the transformer; Step 3: Install the mounting brackets onto the connecting cable trays on the upper side of the corresponding device body; Step 4: Place the fiber optic fixing plate onto the U-shaped clamp at the front of the fixing frame; Step 5: Install the rotating wheel assembly onto the corresponding device body according to the position of the fiber optic fixing plate, and then wrap the fiber optic cable leading out from the fiber optic through flange around the rotating wheel in the rotating wheel assembly. Step 6: After the optical fiber is led out from the rotary disk, it is placed on the optical fiber fixing plate and connected to the corresponding optical fiber probes. The length of the optical fiber is adjusted by rotating the rotary disk.

[0012] In step three, when installing the fixing bracket, first place the connecting wires in the clamping opening at the rear end of the fixing bracket, and then fix the upper end of the clamping opening through the opening connecting plate.

[0013] In step five, the number of rotating discs on the rotating shaft is set according to actual needs, wherein the rotating discs, together with the limiting discs on both sides, are limited by corresponding limiting nuts.

[0014] In step five, the position of the rotary disk on the rotating shaft is adjusted according to actual needs. This is achieved by turning the limiting plate and the limiting nut to change their positions on the rotating shaft, thereby changing the position of the rotary disk on the rotating shaft.

[0015] In step five, the rotary disc is replaced as needed. When replacing it, the limiting disc on one side is rotated off the rotating shaft, and then the rotary disc is removed from the rotating shaft and replaced.

[0016] The advantages and positive effects of this invention are as follows: 1. The optical fiber of the present invention is led out from the optical fiber through flange and first wound around the rotating disk of the rotating wheel assembly. In this way, the length of the optical fiber can be adjusted by rotating the rotating disk according to the actual layout of the optical fiber probe, thereby avoiding situations such as optical fiber drooping or excessive optical fiber bending. It is flexible in use and can meet the needs of different optical fiber probe layouts.

[0017] 2. The rotary wheel assembly of the present invention can adjust the position of the rotary wheel on the rotating shaft according to actual needs, and can also replace the rotary wheel of appropriate specifications according to the actual fiber optic cable length to ensure that the fiber optic cable can be evenly wound on the rotary wheel without affecting the release and retraction of the fiber optic cable.

[0018] 3. In this invention, the optical fiber is led out from the rotary disk and arranged on the optical fiber fixing plate. The optical fiber fixing plate is supported only by U-shaped clamps. This allows the optical fiber fixing plate to be easily removed and replaced with an appropriate length of optical fiber fixing plate according to the layout of the optical fiber probe.

[0019] 4. The present invention can also be used by arranging an appropriate number of fiber optic fixing plates in a line according to actual needs, so as to achieve the purpose of length adjustment. The mating ends of two adjacent fiber optic fixing plates can be opened, and then the ends of the two fiber optic fixing plates can be fixedly connected by binding with cloth tape through the holes.

[0020] 5. The fixing bracket of the fiber optic fixing plate of the present invention is mounted on the connecting cable strip on the upper side of the device body. The spacing and number of fixing brackets can be adjusted according to actual needs. The connecting cable strip is placed on the clamping opening at the rear end of the fixing bracket, and the upper end of the clamping opening is fixed through the opening connecting plate. After removing the opening connecting plate, the spacing and number of fixing brackets can be adjusted. The operation is simple and convenient. At the same time, it can be used to adjust the length of the fiber optic fixing plate to meet the needs of different fiber optic probe layouts, further improving the flexibility of the present invention. Attached Figure Description

[0021] Figure 1 This is a schematic diagram illustrating the usage state of the present invention. Figure 2 for Figure 1 Enlarged view of point A in the image. Figure 3 for Figure 1 Enlarged view of point B in the image. Figure 4 for Figure 3 The main view of the central rotating wheel component. Figure 5 for Figure 4 A schematic diagram showing the state of the intermediate rotor assembly when multiple rotor bodies are configured. Figure 6 for Figure 3 Side view of the central rotary wheel assembly.

[0022] Among them, 1 is the rotary disk, 2 is the limiting disk, 3 is the limiting nut, 4 is the rotating shaft, 5 is the rotary disk mounting bracket, 6 is the optical fiber cable, 701 is the internal optical fiber probe of the coil, 702 is the optical fiber probe of the iron core yoke, 8 is the optical fiber fixing plate, 9 is the U-shaped clamp, 10 is the fixing frame, 1001 is the clamping opening, 1002 is the opening connecting plate, 11 is the box wall, 12 is the optical fiber through flange, 13 is the device body, 14 is the iron core yoke, 15 is the iron core clamp, 16 is the rotary disk assembly, 17 is the clamp end connecting plate, and 18 is the connecting cable bar. Detailed Implementation

[0023] The invention will now be described in further detail with reference to the accompanying drawings.

[0024] like Figures 1-6 As shown, the present invention includes an optical fiber fixing plate 8, a fixing frame 10, and a rotating wheel assembly 16, wherein... Figures 1-2 As shown, the fixing frame 10 is fixed to the upper side of the corresponding body 13, and the fixing frame 10 is provided with U-shaped clamps 9. The optical fiber fixing plate 8 is supported by each U-shaped clamp 9. The transformer box wall 11 is provided with an optical fiber through flange 12, and the end of the optical fiber fixing plate 8 near the optical fiber through flange 12 is provided with a rotating wheel assembly 16, as shown. Figures 3-6 As shown, the rotating wheel assembly 16 includes a rotating disk 1 and a rotating shaft 4, with the rotating disk 1 rotatably mounted on the rotating shaft 4. Limiting disks 2 are provided on both sides of the rotating disk 1, and the limiting disks 2 are threadedly mounted on the rotating shaft 4. Figure 1 As shown, the optical fiber 6 is led out from the optical fiber through flange 12, first wrapped around the rotary disk 1 and its displacement is limited by the limiting disks 2 on both sides, and then led out and fixed on the optical fiber fixing plate 8.

[0025] This invention firstly adjusts the length of the optical fiber 6 by rotating the rotating disk 1 according to the actual layout of the optical fiber probe, thereby avoiding situations such as optical fiber sag or excessive bending. The diameter of the rotating disk 1 must be greater than the minimum allowable bending radius of the optical fiber 6; in this embodiment, the diameter of the rotating disk 1 is 150mm. Secondly, the invention uses limiting disks 2 on both sides to limit both the axial displacement of the rotating disk 1 and the displacement of the optical fiber 6 wound around the rotating disk 1. Simultaneously, the position of the rotating disk 1 on the rotating shaft 4 can be adjusted according to actual needs. Rotating the limiting disk 2 to change its position on the rotating shaft 4 achieves the purpose of adjusting the position of the rotating disk 1. Furthermore, it allows for easy replacement of a rotating disk 1 of appropriate specifications according to the actual length of the optical fiber 6, ensuring that the optical fiber 6 is evenly wound on the rotating disk 1 without affecting the release and retraction of the optical fiber 6. Specifically, after rotating one of the limiting disks 2 off the rotating shaft 4, a rotating disk 1 of appropriate specifications can be replaced according to the length of the optical fiber 6. Furthermore, the fiber optic fixing plate 8 of this invention is supported only by various U-shaped clamps 9. This allows for convenient removal and replacement of the fiber optic fixing plate 8 with a suitable length, depending on the layout of the fiber optic probes. Simultaneously, this invention can also arrange a suitable number of fiber optic fixing plates 8 in a straight line for use, thus achieving length adjustment. Each fiber optic fixing plate 8 is supported by a corresponding U-shaped clamp 9. The mating ends of two adjacent fiber optic fixing plates 8 can be perforated, and then bound together with fabric tape through the perforations to secure the ends of the two fiber optic fixing plates 8. Therefore, through the above structural design, this invention can flexibly adjust both the length of the fiber optic cable 6 and the length of the fiber optic fixing plate 8 that fixes the fiber optic cable 6, thereby meeting the needs of different fiber optic cable 6 arrangements, making it flexible in use and widely applicable.

[0026] like Figures 3-6 As shown, in this embodiment, the rotary disk 1 is adjustablely mounted on the rotating shaft 4, wherein the rotating shaft 4 is threaded with multiple limiting nuts 3, and the outer side of the limiting disk 2 contacts the corresponding limiting nut 3 to achieve the limiting purpose. Additionally, as shown... Figure 5 As shown, the present invention, through the above structure, can also achieve the purpose of setting multiple sets of rotating disks 1 on the rotating shaft 4, thus... Figure 1 As shown, different optical fiber lines 6 leading out from the optical fiber through flange 12 can be wound around the corresponding rotary disk 1 to adjust their lengths, thereby further improving the adjustment flexibility of the present invention.

[0027] like Figure 3 As shown, in this embodiment, the rotating shaft 4 is mounted on a rotating wheel mounting bracket 5, as... Figure 1As shown, the upper clamp 15 and the lower clamp of the transformer core are connected by a clamp connecting plate, which is a well-known technology in the art. The ends of the upper clamp 15 and the lower clamp are connected by a clamp end connecting plate 17, and the wheel mounting bracket 5 is fixed to the clamp end connecting plate 17. Additionally, as shown... Figures 3-5 As shown, the rotating wheel mounting bracket 5 is used to install the free end of the rotating shaft 4, and can also cooperate with the corresponding side limit nut 3 to limit the rotating wheel disk 1 and the limit disk 2.

[0028] like Figures 1-2 As shown, in this embodiment, the upper end of the transformer body 13 is provided with a connecting cable tray 18, and the fixing bracket 10 is disposed on the corresponding connecting cable tray 18, wherein... Figure 2 As shown, in this embodiment, the rear end of the fixing frame 10 is provided with a clamping opening 1001, and the upper end of the clamping opening 1001 is provided with an opening connecting plate 1002. During installation, the connecting cable strip 18 is first placed in the clamping opening 1001, and then the upper end of the clamping opening 1001 is fixedly connected through the opening connecting plate 1002, thereby achieving the purpose of installing the fixing frame 10 on the connecting cable strip 10. The connecting cable strip 10 is a technology known in the art. One end of it is connected to the terminal plate on the device body 13, and the other end is provided with a connecting terminal plate for connecting to external equipment cables.

[0029] In this embodiment, the rotary disk 1, the limiting disk 2, the rotating shaft 4, the limiting nut 3, the fiber fixing plate 8, the U-shaped clamp 9, and the fixing frame 10 are all made of insulating materials, such as wood.

[0030] In this embodiment, as Figure 1 As shown, the fiber optic probes on the transformer include an internal coil fiber optic probe 701 located inside the transformer body 13 and an upper core yoke fiber optic probe 702 located on the upper core yoke 14. The fiber optic probes are known in the art and are commercially available products.

[0031] The working principle of this invention is as follows: The installation of this invention includes the following steps: Step 1: Determine the layout of the fiber optic probe on the transformer; Step 2: Determine the total length and number of fiber optic mounting plates 8 and the number of mounting brackets 10 based on the layout of the fiber optic probes on the transformer; Step 3: Install the fixing brackets 10 onto the connecting cable trays 18 on the upper side of the corresponding device body 13, such as... Figure 2 As shown, during installation, the connecting cable 18 is first placed in the clamping opening 1001 at the rear end of the fixing frame 10, and then the upper end of the clamping opening 1001 is fixedly connected through the opening connecting plate 1002.

[0032] Step 4: Place the fiber optic fixing plate 8 on the U-shaped clamp 9 at the front of the fixing frame 10.

[0033] Step 5: Install the rotating wheel assembly 16 onto the corresponding body 13 according to the height position of the fiber optic fixing plate 8, and then wrap the fiber optic cable 6 led out from the fiber optic through flange 12 around the rotating wheel disk 1 in the rotating wheel assembly 16.

[0034] Among them, such as Figures 4-5 As shown, the number of rotary disks 1 on the rotating shaft 4 can be set according to actual needs. The displacement of the rotary disk 1 together with the limiting disks 2 on both sides can be limited by the corresponding limiting nuts 3. In this way, different optical fiber lines 6 led out from the optical fiber through flange 12 can be wound around the corresponding rotary disk 1 respectively.

[0035] Secondly, the position of the rotary disk 1 on the rotating shaft 4 can be adjusted according to actual needs. Specifically, the position of the limiting disk 2 and the limiting nut 3 on the rotating shaft 4 can be changed by turning them, thereby achieving the purpose of adjusting the position of the rotary disk 1.

[0036] The rotating disc 1 can be replaced with a suitable size according to actual needs. After rotating the limiting disc 2 on one side and removing it from the rotating shaft 4, the rotating disc 1 of the appropriate size can be replaced according to the length of the optical fiber 6. This can ensure that the optical fiber 6 is evenly wound on the rotating disc 1, thereby ensuring that the optical fiber 6 can be smoothly released and retracted without affecting the subsequent adjustment of the length of the optical fiber 6.

[0037] Step 6: After the optical fiber cable 6 is led out from the rotary disk 1, it is arranged on the optical fiber fixing plate 8 and connected to the corresponding optical fiber probes. The rotary disk 1 is rotated to adjust the length of the optical fiber cable 6 to avoid the optical fiber from drooping or bending too much. The optical fiber cable 6 is fixed on the optical fiber fixing plate 8 with insulating tape.

[0038] After the above installation is completed, the rotating disk 1 is further clamped by the limiting disks 2 and limiting nuts 3 on both sides, so that the rotating disk 1 no longer rotates, thereby preventing the free rotation of the rotating disk 1 from causing the length of the optical fiber 6 to change.

Claims

1. A fixing and rotating structure for a transformer temperature-sensing fiber optic cable, characterized in that: The transformer includes an optical fiber fixing plate (8), a fixing frame (10), and a rotating wheel assembly (16). The fixing frame (10) is fixed to the upper side of the corresponding body (13), and the fixing frame (10) is provided with U-shaped clamps (9). The optical fiber fixing plate (8) is supported by each U-shaped clamp (9). The transformer box wall (11) is provided with an optical fiber through flange (12), and the optical fiber fixing plate (8) is provided with a rotating wheel assembly (16) at one end near the optical fiber through flange (12). The rotating wheel assembly (16) includes a rotating disc (…). 1) and the rotating shaft (4), and the rotating disk (1) is rotatably mounted on the rotating shaft (4). The rotating disk (1) is provided with limiting disks (2) on both sides, and the limiting disks (2) are threaded onto the rotating shaft (4). The optical fiber (6) is led out from the optical fiber through flange (12), first wound around the rotating disk (1) and limited by the limiting disks (2) on both sides, and then led out and fixed on the optical fiber fixing plate (8). The diameter of the rotating disk (1) is greater than the minimum bending radius allowed for the optical fiber (6).

2. The fixing and rotating structure of the transformer temperature measuring fiber optic cable according to claim 1, characterized in that: The rotating shaft (4) is threaded with multiple limiting nuts (3), and the outer side of the limiting plate (2) is in contact with the corresponding limiting nut (3).

3. The fixing and rotating structure of the transformer temperature measuring fiber optic cable according to claim 2, characterized in that: The transformer body (13) is provided with a connecting line bar (18) at the upper end, and the fixing frame (10) is provided on the corresponding connecting line bar (18). The fixing frame (10) is provided with a clamping opening (1001) at the rear end, and an opening connecting plate (1002) is provided at the upper end of the clamping opening (1001). The connecting line bar (18) is placed in the clamping opening (1001).

4. The fixing and rotating structure of the transformer temperature measuring fiber optic cable according to claim 1, characterized in that: The rotating shaft (4) is mounted on a rotating wheel mounting frame (5). The ends of the upper clamp (15) and the lower clamp of the transformer core are connected by a clamp end connecting plate (17), and the rotating wheel mounting frame (5) is fixed on the clamp end connecting plate (17).

5. The fixing and rotating structure of the transformer temperature measuring fiber optic cable according to claim 1, characterized in that: The mating ends of two adjacent fiber optic fixing plates (8) are provided with openings, and the mating ends of the two fiber optic fixing plates (8) are connected by binding after passing through the holes with cloth tape.

6. A method for fixing the transformer temperature measuring fiber optic cable and installing the rotating wheel structure according to claim 3, characterized in that: Includes the following steps: Step 1: Determine the layout of the fiber optic probe on the transformer; Step 2: Determine the total length and number of fiber optic fixing plates (8) and the number of fixing brackets (10) based on the layout of the fiber optic probes on the transformer; Step 3: Install the fixing bracket (10) on the connecting cable strip (18) on the upper side of the corresponding body (13); Step 4: Place the fiber optic fixing plate (8) on the U-shaped clamp (9) at the front of the fixing frame (10); Step 5: Install the rotating wheel assembly (16) on the corresponding body (13) according to the position of the fiber fixing plate (8), and then wrap the fiber line (6) led out from the fiber through flange (12) around the rotating wheel disk (1) in the rotating wheel assembly (16); Step 6: After the fiber optic cable (6) is led out from the rotary disk (1), it is placed on the fiber optic fixing plate (8) and connected to the corresponding fiber optic probes. The rotary disk (1) is rotated to adjust the length of the fiber optic cable (6).

7. The method for fixing the transformer temperature measuring fiber optic cable and installing the rotating wheel structure according to claim 6, characterized in that: In step three, when installing the fixing frame (10), first place the connecting cable strip (18) in the clamping opening (1001) at the rear end of the fixing frame (10), and then fix the upper end of the clamping opening (1001) through the opening connecting plate (1002).

8. The method for fixing the transformer temperature measuring fiber optic cable and installing the rotating wheel structure according to claim 6, characterized in that: In step five, the number of rotary discs (1) on the rotating shaft (4) is set according to actual needs, wherein the rotary discs (1) together with the limiting discs (2) on both sides are limited by the corresponding limiting nuts (3).

9. The method for fixing the transformer temperature measuring fiber optic cable and installing the rotating wheel structure according to claim 6, characterized in that: In step five, the position of the rotary disk (1) on the rotating shaft (4) is adjusted according to actual needs. Tightening the limiting disk (2) and the limiting nut (3) changes the position of the limiting disk (2) and the limiting nut (3) on the rotating shaft (4), thereby changing the position of the rotary disk (1) on the rotating shaft (4).

10. The method for fixing the transformer temperature measuring fiber optic cable and installing the rotating wheel structure according to claim 6, characterized in that: In step five, the rotary disk (1) is replaced as needed. When replacing it, the limiting disk (2) on one side is rotated off the rotating shaft (4), and then the rotary disk (1) is removed from the rotating shaft (4) and replaced.

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