A connection structure between a coil and a composite insulator

Abstract

The present invention provides a connection structure between a coil and a composite insulator, relating to the field of power transmission technology. The structure comprises a pull rod and a plurality of first and second insulators alternately arranged on the pull rod. A pull rod sleeve is provided on the outside of the pull rod. The first and second insulators are provided with a plurality of energy transmission devices on the outside. The energy transmission devices include a clamp, a locking ring, an shed, and a coil assembly. The inner wall of the clamp is in close contact with the upper surface of the first or second insulator. The clamp is connected to the locking ring at the top and bottom. The distal end of the clamp is connected to the proximal end of the shed, and the distal end of the shed is connected to the upper portion of the coil assembly. The present invention not only solves the problem of unadjustable distance between coils, but also allows the coil to be removed for repair when a coil fails, thus improving maintainability, ensuring that the coil is less exposed to rain, and shielding it from snow. The support structure improves the operating reliability of the coil in harsh outdoor conditions.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission, and in particular to a connection structure between a coil and a composite insulator. Background Art

[0002] During high-voltage power operation, power safety and operational status are two critical concerns, spurring the development of online monitoring equipment capable of monitoring these functions. Most online monitoring equipment is powered by wireless power transmission (WPT) devices. These devices consist of insulators and power transmission coils. While ensuring insulation requirements, WPT devices extract the current energy from the transmission line through a CT (current transformer) and supply it to the online monitoring equipment. However, the efficiency of this device is affected by the WPT coil's quality factor, resonant frequency, and coupling coefficient. When designing a WPT device, the WPT coil dimensions and structure, as well as the system's resonant frequency, are known. Therefore, the distance between the coils becomes a key factor in determining the coupling coefficient, which in turn affects the WPT device's efficiency.

[0003] In previous systems where coils were embedded within insulators, the coil and composite insulator were integrated into the insulator. Because the insulator's manufacturing method dictated that its position could not be changed, the coil spacing was difficult to adjust. A coil failure required the insulator to be removed for maintenance. While the coil spacing in this system could not be adjusted, the transmitted power was sufficient for online monitoring equipment, but efficiency was low and energy loss was significant. Furthermore, a coil failure was difficult to repair. Summary of the Invention

[0004] In response to the aforementioned technical problem that the distance between coils cannot be adjusted and the coils are difficult to remove for repair when they fail, a connection structure between the coils and the composite insulator is provided. The present invention mainly utilizes a detachable connection structure to achieve the technical effect of adjusting the distance between the coils.

[0005] The technical means adopted in the present invention are as follows:

[0006] A connection structure between a coil and a composite insulator, characterized in that it includes a pull-out rod and several first insulators and second insulators alternately arranged on the pull-out rod, a pull-out rod sleeve is provided outside the pull-out rod, several energy transmission devices are provided outside the pull-out rod sleeve, the energy transmission device includes a clamp, a locking ring, an umbrella skirt and a coil combination, the clamp includes several pieces of umbrella-shaped clamp bodies, a boss is provided above the overlapping gap between every two pieces of the clamp bodies, a clamping groove is respectively provided at the upper and lower ends of the clamp bodies, the clamping groove is connected to the locking ring, the inner wall of the clamp is tightly attached to the upper surface of the first insulator or the second insulator, the upper and lower parts of the clamp are respectively connected to a locking ring, the distal end of the clamp is connected to the proximal end of the umbrella skirt, and the distal end of the umbrella skirt is connected to the upper part of the coil combination.

[0007] Furthermore, the coil assembly includes two upper and lower edge plates, a wire and a curved sealing plate.

[0008] Furthermore, the edge plate and the curved sealing plate are made of insulating hard materials, the upper and lower edge plates are O-shaped circular ring thin plates, the curved sealing plate connects the inner rings of the two edge plates, the edge plate and the curved sealing plate form a U-shaped cross-section, and the wire is wound inside the U-shaped frame formed by the edge plate and the curved sealing plate.

[0009] Furthermore, the edge plate and the curved sealing plate are made of epoxy resin, and the U-shaped frame limits the displacement of the wire in the radial and vertical directions.

[0010] Furthermore, the number of the first insulators is n, the number of the second insulators is n-, and the number of the coil combinations is m, where m is less than n- and m is a positive integer greater than.

[0011] Furthermore, an electromagnetic shielding cover is provided at each end of the drawing rod.

[0012] Furthermore, the umbrella skirt is made of insulating rubber material, and the umbrella skirt is connected to the upper edge plate through bolts.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] The present invention changes the connection method between the coil and the composite insulator. By combining three clamp bodies with the same structure, the insulator can be easily installed and removed at any spatial position, making it possible to install a wireless power transmission device in a space-constrained location. The upper and lower parts of the clamp are fixed by locking rings, making this structure more convenient during installation and removal.

[0015] The present invention adjusts the distance by removing the clamp. Because the inner ring radius of the shed is larger than the radius of the first insulator, the shed can be moved axially along the composite insulator with the clamp removed, allowing the distance to be adjusted. This allows the distance between the coils to be adjusted, allowing the coils to operate at the critical coupling point. This further improves the system's transmission efficiency. Adjustable coil distance enhances system compatibility.

[0016] The present invention is applied to high-voltage lines, and the combination of the shed and the clamp is used to increase the creepage distance to prevent voltage breakdown caused by too small a creepage distance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 It is the front view of the present invention.

[0019] Figure 2 It is a top view of the present invention.

[0020] Figure 3 Schematic diagram of the boss position of the present invention.

[0021] Figure 4 It is a cross-sectional view of the clamp of the present invention.

[0022] Figure 5 It is the front view of the umbrella skirt of the present invention.

[0023] Figure 6 It is a top view of the umbrella skirt of the present invention.

[0024] Figure 7 This is a diagram showing the connection between the clamp and the umbrella skirt of the present invention.

[0025] Figure 8 This is a diagram showing the connection between the shed and the coil of the present invention.

[0026] Figure 9 This is a cross-sectional view of the coil of the present invention.

[0027] Figure 10 Schematic diagram of the electromagnetic shielding cover of the present invention.

[0028] In the figure: 1. first insulator; 2. second insulator; 3. pull-out rod; 4. coil assembly; 41. edge plate; 42. conductor; 43. bent sealing plate; 5. clamp; 51. clamp body; 52. boss; 53. slot; 6. umbrella skirt; 7. locking ring; 8. pull-out rod sleeve; 9. electromagnetic shielding cover. DETAILED DESCRIPTION

[0029] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0030] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0032] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values described in these embodiments do not limit the scope of the present invention. At the same time, it should be clear that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The techniques, methods and equipment known to ordinary technicians in the relevant fields may not be discussed in detail, but where appropriate, the techniques, methods and equipment should be considered as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0033] In the description of the present invention, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention: the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0034] For ease of description, spatially relative terms such as "above," "above," "on the upper surface of," and "above" may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is inverted, a device described as "above" or "on top of" another device or structure would then be positioned as "below" or "below" the other device or structure. Thus, the exemplary term "above" may include both the orientations of "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used herein should be interpreted accordingly.

[0035] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0036] like Figure 1-10As shown, the present invention provides a coil-to-composite insulator connection structure, comprising a guide rod 3 and a plurality of first and second insulators 1 and 2 alternately arranged on the guide rod 3. Each insulator has a central hole. An electromagnetic shield 9 is provided at each end of the guide rod 3 to shield the wireless power transmission device from external electromagnetic interference. There are n first insulators 1, n-1 second insulators 2, and m coil assemblies 4, where m is less than n-1 and m is a positive integer greater than 2. The diameter of the first insulator 1 is greater than that of the second insulator 2. A guide rod sleeve 8 is provided on the outside of the guide rod 3. Several energy transmission devices are provided on the outside of the guide rod sleeve 8. These energy transmission devices include a clamp 5, a locking ring 7, sheds 6, and the coil assembly 4. The locking ring 7 features a screw-type elastic locking mechanism, which facilitates locking and releasing the locking slot 53. The coil assembly 4 is annular in shape, which provides a high conversion efficiency of magnetic field energy into electrical energy. The coil assembly 4 comprises two upper and lower edge plates 41, a conductor 42, and a curved sealing plate 43. The edge plates 41 and curved sealing plate 43 are made of a rigid insulating material. The upper and lower edge plates 41 are thin O-shaped circular rings. The curved sealing plate 43 connects the inner rings of the two edge plates 41. The edge plates 41 and curved sealing plate 43 form a U-shaped cross-section, and the conductor 42 is wound within the U-shaped frame formed by the edge plates 41 and curved sealing plate 43. The edge plates 41 and curved sealing plate 43 are made of epoxy resin, and the U-shaped frame restricts conductor displacement in the radial and vertical directions. The inner wall of the clamp 5 is tightly attached to the upper surface of the first insulator 1 or the second insulator 2. The upper surface of the clamp 5 is connected to a locking ring 7. The distal end of the clamp 5 is connected to the proximal end of an shed 6, which is then connected to the upper portion of the coil assembly 4. The shed 6 is made of insulating rubber and is bolted to the upper edge plate 41. The shed 6 not only reduces damage to the coil from rain and snow, but more importantly, it increases the creepage distance, preventing voltage breakdown caused by a short creepage distance. The clamp 5 comprises several pieces forming an umbrella-shaped clamp body 51. A boss 52 is positioned above the gap between each pair of clamp bodies 51. A slot 53 is located at the top of each clamp body 51, which is connected to the locking ring 7. The clamp body 51 of the clamp 5 has a 120° umbrella-shaped structure. The internal structure of the clamp body 51 perfectly matches the shape of the insulator 1 or 2, and the three clamps together enclose the insulator.There is a boss 52 on the counterclockwise side of the clamp body 51, which covers the overlapping gap between adjacent clamp bodies 51 to prevent rainwater from entering the insulator. The boss 52 is a symmetrical structure about the overlapping line; the material of the clamp 5 is silicone rubber, and the distal end of the clamp 5 is connected to the proximal end of the umbrella skirt 6 by bolts. This structure ensures that the distal end of the clamp 5 is fixed by the structure of the umbrella skirt 6. There is a slot 53 on the upper and lower sides of the clamp 5, and a locking ring 7 is placed in the slot 53. Tightening the locking ring 7 makes the three clamps 5 fit more closely and fixes the clamp 5 on the insulator and the pull-out rod sleeve 8; the structural strength of the pull-out rod 3 and the clamp 5 made of glass fiber epoxy resin can not only meet the requirements of themselves and external forces, but also meet the weight of multiple transmission devices and the requirements of external forces acting on the transmission devices; when making the pull-out rod 3, the shaft diameter of the pull-out rod 3 is appropriately increased to enhance the anti-swing ability. During the manufacturing process of the clamp 5 , the thickness can be increased at the clamping groove 53 where stress is concentrated, so as to increase the ability of the clamp 5 to bear the weight of the shed 6 and the coil assembly 4 .

[0037] This invention changes the connection method between the coil and the composite insulator. By combining three identical clamps, the insulator can be easily installed and removed from any spatial position, making it possible to install wireless power transmission devices in spatially confined locations. The clamps are secured with a locking ring above, making this structure more convenient during installation and removal. This invention allows the distance between the coils to be adjusted, allowing the coils to operate at the critical coupling point. This further improves the system's transmission efficiency. The adjustable coil distance enhances the system's compatibility.

[0038] The present invention is used on high-voltage lines. The combination of sheds and clamps increases creepage distance to prevent voltage breakdown caused by insufficient creepage distance. It is suitable for powering intelligent power equipment on high-voltage line towers, high-voltage busbars, or other equipment.

[0039] The coil assembly 4 is electrically connected to the power equipment. The coil assembly 4 generates an induced electromotive force in a high-frequency changing magnetic field, converting magnetic energy into electrical energy. Utilizing Faraday's law of electromagnetic induction, a wireless power transmission device is used to transfer the high-voltage side electrical energy to the low-voltage side for use by the online monitoring equipment.

[0040] The insulator-coil connection structure described herein is primarily used for power transmission in high-voltage lines. The two ends of the puller rod (3) are fixed to the high-voltage and low-voltage sides of the high-voltage line, respectively, using clamps. This results in four power transmission modes: high-voltage-high-voltage, high-voltage-low-voltage, low-voltage-high-voltage, and low-voltage-low-voltage. The high-voltage transmission device is placed on the former side, and the power-consuming equipment is placed on the latter side.

[0041] When disassembly is required, first remove the locking rings 7 at both ends of the clamp 5, then remove the bolts connecting the clamp 5 and the shed 6, lift the coil 4 and shed 6, and then remove the clamp 5 to separate it from the insulator. Since the inner diameter of the proximal end of the shed 6 is larger than the first insulator, the shed 6 and the coil 4 can be moved axially along the pull-out rod to achieve the effect of changing the coil distance.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A connection structure between a coil and a composite insulator, characterized by: The invention comprises a drawing rod (3) and a plurality of first insulators (1) and second insulators (2) alternately arranged on the drawing rod (3), wherein the diameter of the first insulator (1) is larger than the diameter of the second insulator (2), a drawing rod sleeve (8) is arranged outside the drawing rod (3), and a plurality of energy transmission devices are arranged outside the drawing rod sleeve (8), wherein the energy transmission devices comprise a clamp (5), a locking ring (7), an umbrella skirt (6) and a coil assembly (4), wherein the clamp (5) comprises a plurality of pieces of an umbrella-shaped clamp body (51), and each two pieces of the clamp body (51) are connected to each other. A boss (52) is provided above the overlapped gap of the clamp body (51), a clamping groove (53) is provided at each of the upper and lower ends of the clamp body (51), the clamping groove (53) is connected to the locking ring (7), the inner wall of the clamp (5) is in close contact with the upper surface of the first insulator (1) or the second insulator (2), the upper and lower parts of the clamp (5) are connected to a locking ring (7), the distal end of the clamp (5) is connected to the proximal end of the umbrella skirt (6), and the distal end of the umbrella skirt (6) is connected to the upper part of the coil assembly (4).

2. The connection structure between the coil and the composite insulator according to claim 1, characterized in that: The coil assembly (4) comprises two upper and lower edge plates (41), a conducting wire (42) and a curved sealing plate (43).

3. The connection structure between the coil and the composite insulator according to claim 2, characterized in that: The edge plate (41) and the curved sealing plate (43) are made of insulating hard material. The upper and lower edge plates (41) are O-shaped circular ring thin plates. The curved sealing plate (43) connects the inner rings of the two edge plates (41). The edge plate (41) and the curved sealing plate (43) form a U-shaped cross section. The wire (42) is wound inside the U-shaped frame formed by the edge plate (41) and the curved sealing plate (43).

4. The connection structure between the coil and the composite insulator according to claim 3, characterized in that: The edge plate (41) and the curved sealing plate (43) are made of epoxy resin, and the U-shaped frame limits the displacement of the wire in the radial and vertical directions.

5. The connection structure between a coil and a composite insulator according to claim 1, characterized in that: The number of the first insulators (1) is n, the number of the second insulators (2) is n-1, and the number of the coil assemblies (4) is m, where m is less than n-1 and is a positive integer greater than 2.

6. The connection structure between a coil and a composite insulator according to claim 1, characterized in that: An electromagnetic shielding cover (9) is provided at each end of the drawing rod (3).

7. The connection structure between a coil and a composite insulator according to claim 1, characterized in that: The umbrella skirt (6) is made of insulating rubber material, and the umbrella skirt (6) is connected to the upper edge plate (41) via bolts.

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