Insulator having wireless electric energy transmission function and electric energy extraction and transmission system

Abstract

The present invention relates to the technical field of insulators, and disclosed are an insulator having a wireless electric energy transmission function and an electric energy extraction and transmission system. The insulator comprises an insulating body and a wireless energy transmission coil. The wireless energy transmission coil is wound and packaged in the insulating body. The wireless energy transmission coil has a plurality of turns, and the diameter of each turn gradually increases in a first direction to form a concave shape. The present invention solves the technical problem of existing online monitoring apparatuses for monitoring power grids being limited by weather and batteries.

Description

Insulator with wireless power transmission function and power transmission system Technical Field

[0001] The present invention relates to the technical field of insulators, and in particular to an insulator with wireless power transmission function and a power supply and energy transmission system. Background Art

[0002] With the development of society, realizing online monitoring of poles and towers is crucial to building smart grids. However, how to power the online monitoring devices has become a key issue restricting its development. Currently, the power supply methods for online monitoring devices of poles and towers include solar energy, microwaves, batteries, etc. However, they are subject to the influence of weather and battery performance, resulting in great constraints on their usage scenarios and costs.

[0003] Summary of the Invention

[0004] In view of this, the present invention provides an insulator with wireless power transmission function and a power supply and energy transmission system, which are used to solve the technical problem that the power supply mode of the existing online monitoring device for monitoring the power grid is subject to the constraints of weather and batteries.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solution:

[0006] An insulator comprises an insulating body and a wireless energy transmission coil. The wireless energy transmission coil is wound around and encapsulated in the insulating body. The wireless energy transmission coil has multiple turns, and the diameter of each turn gradually increases along a first direction to form a concave shape.

[0007] In some embodiments of the insulator with wireless power transmission function, the insulating body has an insulating wall whose diameter gradually expands along the first direction, the wireless power transmission coil is wound along the first direction and encapsulated in the insulating wall, and the wireless power transmission coil matches the shape of the insulating wall to form a concave shape.

[0008] In some embodiments of the insulator with wireless power transmission function, the interval between two adjacent coils of the wireless power transmission coil gradually increases along the first direction.

[0009] In some embodiments of the insulator with wireless power transmission function, the insulating body includes an insulating part, a steel cap and a steel leg, the insulating part has a head and a tail, the steel cap is sleeved on the head and fixed to the head, the side wall of the tail is the insulating wall, and the steel leg is insulated and connected to the side of the insulating part away from the steel cap; the steel cap and the steel leg are both used for connecting two insulators or connecting the insulator to a hardware fitting.

[0010] In some embodiments of the insulator with wireless power transmission function, the insulating body further includes an elastic gasket, which is disposed between the head and the steel cap and fills a gap between the head and the steel cap.

[0011] In some embodiments of the insulator with wireless power transmission function, a groove is provided on the side of the insulating member facing away from the steel cap, the groove extends to the head, a portion of the steel foot extends into the groove, and is connected to the side wall of the groove by cement encapsulation.

[0012] In some embodiments of the insulator with wireless power transmission function, the insulating body further includes a locking pin, which is respectively connected to the steel cap and the steel leg, and the locking pin is used to fix the position of the steel cap and the steel leg.

[0013] In order to solve the above technical problems, the present invention adopts the following technical solution:

[0014] A power supply and energy transmission system includes an energy supply device, a frequency modulation device, and the insulator with wireless power transmission function described in the above embodiment. The energy supply device is used to supply power from a transmission line. The frequency modulation device is electrically connected to the energy supply device and the wireless power transmission coil of the insulator. The frequency modulation device is used to modulate the frequency of the alternating current obtained by the energy supply device into a resonant frequency that matches the wireless power transmission coil. The wireless power transmission coil is used to transfer electrical energy to a load device.

[0015] In some embodiments of the power transmission system, there are multiple insulators, each of the insulators is closely arranged along the first direction, and each of the wireless energy transmission coils has the same orientation.

[0016] In some embodiments of the power transmission system, the power transmission system further includes a transmitting coil and a capacitor, wherein the transmitting coil is connected in parallel with the capacitor to generate resonance, and the transmitting coil and the capacitor are combined to transfer the electric energy transmitted by the wireless power transmission coil to the load device.

[0017] Implementing the embodiments of the present invention will have at least the following beneficial effects:

[0018] The above-mentioned insulator with wireless power transmission function includes an insulating body and a wireless power transmission coil. By encapsulating the wireless power transmission coil in the insulating body, it can be used to transmit energy, and the concave shape of the wireless power transmission coil has high energy transmission efficiency.

[0019] The above-mentioned power collection and energy transmission system includes an energy collection device, a frequency modulation device and the insulator with wireless power transmission function described in the above embodiment. The energy collection device can draw electricity from the transmission line, and the frequency modulation device can modulate the alternating current obtained by the energy collection device into a resonant frequency matching the wireless energy transmission coil, and finally transmit it to a load device such as an online monitoring device for its use, thereby achieving stable energy collection and transmission, without being restricted by weather and batteries, and improving stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 only 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 work.

[0021] FIG1 is a schematic structural diagram of an insulator in one embodiment;

[0022] FIG2 is a connection diagram of an electric energy transfer system according to an embodiment;

[0023] FIG3 is a graph showing the relationship between the power transmission efficiency of the insulator and the power and load resistance;

[0024] FIG4 is a graph showing the relationship between the insulator power transmission, frequency, and load resistance;

[0025] FIG5 is a diagram showing the electromagnetic field distribution of the wireless energy transmission coil.

[0026] Wherein: 1. Insulator; 111. Insulator; 1111. Head; 1112. Tail; 11121. Insulation wall; 1113. Groove; 112. Steel cap; 113. Steel foot; 12. Wireless power transmission coil; 13. Elastic gasket; 14. Cement encapsulation; 15. Locking pin;

[0027] 2. Energy acquisition device; 3. Frequency modulation device; 4. Load device. DETAILED DESCRIPTION

[0028] To facilitate understanding of the present invention, the present invention will be described more fully below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention may be implemented in many other forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the present disclosure.

[0029] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0031] With the development of society, realizing online monitoring of poles and towers is crucial to building smart grids. However, how to power the online monitoring devices has become a key issue restricting its development. Currently, the power supply methods for online monitoring devices of poles and towers include solar energy, microwaves, batteries, etc. However, they are subject to the influence of weather and battery performance, resulting in great constraints on their usage scenarios and costs.

[0032] Magnetic coupling resonant wireless energy transfer technology offers the advantages of convenient energy acquisition, short-range power transmission, and high efficiency, making it particularly suitable for powering online monitoring devices on towers. Insulators are widely used for tower insulation. Embedding magnetic coupling resonant wireless energy transfer coils in insulators ensures the stability of the coil structure while enabling convenient and rapid energy acquisition and transmission.

[0033] As shown in Figure 1, in an embodiment of an insulator 1 with a wireless power transmission function, the insulator 1 includes an insulating body and a wireless power transmission coil 12. The wireless power transmission coil 12 is wound and encapsulated in the insulating body. The wireless power transmission coil 12 has multiple turns, and the diameter of each turn gradually increases along the first direction to form a concave shape.

[0034] In this embodiment, the wireless energy transmission coil 12 is encapsulated in an insulating body so as to transmit energy, and the concave shape of the wireless energy transmission coil 12 has high energy transmission efficiency.

[0035] Specifically, the first direction is the X direction in the figure.

[0036] In an embodiment of an insulator 1 with a wireless power transmission function, the insulating body has an insulating wall 11121 whose diameter gradually expands along the first direction. The wireless power transmission coil 12 is wound along the first direction and encapsulated in the insulating wall 11121. The wireless power transmission coil 12 matches the shape of the insulating wall 11121, thereby forming a concave shape.

[0037] In this embodiment, it can be understood that the outer surface of the insulating wall 11121 can be a slope or an arc surface to form a trumpet shape, and the first direction is the direction from the end with a smaller diameter of the insulating wall 11121 to the end with a larger diameter. By setting the wireless energy transmission coil 12 to match the shape of the insulating wall 11121 to form a concave shape, compared to the planar type, firstly, it can make more full use of the internal space of the insulating body, thereby increasing the number of turns of the wireless energy transmission coil 12, and secondly, it can form a concave shape, and the wireless energy transmission coil 12 with a concave structure has higher energy transmission efficiency.

[0038] Specifically, the interval between two adjacent coils of the wireless energy transmission coil 12 along the first direction gradually increases.

[0039] In an embodiment of an insulator 1 with a wireless power transmission function, the insulating body includes an insulating part 111, a steel cap 112 and a steel leg 113. The insulating part 111 has a head 1111 and a tail 1112. The steel cap 112 is sleeved on the head 1111 and fixed to the head 1111. The side wall of the tail 1112 is the insulating wall 11121. The steel leg 113 is insulated and connected to the side of the insulating part 111 away from the steel cap 112. The steel cap 112 and the steel leg 113 are both used for connecting two insulators 1 or connecting the insulator 1 with a hardware.

[0040] In this embodiment, specifically, the material of the insulating member 111 can be ceramic, which has good insulation properties. In addition, it can be understood that during use, the insulators 1 are generally arranged in a row and used in series. By providing the steel cap 112 and the steel leg 113, the connection between two adjacent insulators 1 can be facilitated, and the insulators 1 at the head and tail also need to be connected to the hardware, which is also connected to the steel cap 112 and the steel leg 113.

[0041] Specifically, the tail portion 1112 is disc-shaped, and the head portion 1111 is disposed at a middle position of the tail portion 1112 , and the head portion 1111 is a cylindrical structural member.

[0042] In an embodiment of an insulator 1 with wireless power transmission function, the insulating body further includes an elastic gasket 13 , which is disposed between the head 1111 and the steel cap 112 and fills the gap between the head 1111 and the steel cap 112 .

[0043] In this embodiment, by providing the elastic pad 13 , the connection between the head 1111 and the steel cap 112 can be made tighter, thereby preventing the steel cap 112 from separating from the head 1111 .

[0044] In an embodiment of an insulator 1 with wireless power transmission function, a groove 1113 is provided on the side of the insulating member 111 facing away from the steel cap 112, and the groove 1113 extends to the head 1111. Part of the steel foot 113 extends into the groove 1113 and is connected to the side wall of the groove 1113 through a cement package 14.

[0045] In this embodiment, the connection stability between the steel foot 113 and the insulating member 111 can be improved by extending the steel foot 113 into the groove 1113 and connecting it to the side wall of the groove 1113 through cement packaging 14.

[0046] Specifically, in combination with the previous embodiment, the tail portion 1112 is disc-shaped, and the head portion 1111 is cylindrical, and the groove 1113 is slotted from the side of the tail portion 1112 away from the head portion 1111 and extends into the head portion 1111, so that the head portion 1111 becomes a cylindrical structure, and the steel foot 113 extends into the cylinder.

[0047] Preferably, the axial direction of the steel foot 113 is parallel to the first direction.

[0048] In an embodiment of an insulator 1 with wireless power transmission function, the insulating body further includes a locking pin 15, which is connected to the steel cap 112 and the steel leg 113 respectively, and the locking pin 15 is used to fix the position of the steel cap 112 and the steel leg 113.

[0049] In this embodiment, the steel cap 112 and the steel leg 113 are connected by adding a locking pin 15. Specifically, the locking pin 15 can be passed through the steel cap 112 and the steel leg 113, so that the steel cap 112 and the steel leg 113 can be fixed in position by the locking pin 15, and can also prevent the insulator 1 from splitting, thereby improving the structural stability of the overall insulator 1.

[0050] The present invention also relates to an electric power collection and energy transmission system, as shown in Figure 2, comprising an energy collection device 2, a frequency modulation device 3 and an insulator 1 with wireless power transmission function in the previous embodiment, wherein the energy collection device 2 is used to draw power from the transmission line, and the frequency modulation device 3 is electrically connected to the energy collection device 2 and the wireless power transmission coil 12 of the insulator 1, and the frequency modulation device 3 is used to modulate the frequency of the alternating current obtained by the energy collection device 2 into a resonant frequency matching the wireless power transmission coil 12, and the wireless power transmission coil 12 is used to transmit electric energy to the load device 4.

[0051] The energy harvesting device 2 can draw electricity from the transmission line, and the frequency modulation device 3 can modulate the AC power obtained by the energy harvesting device 2 into a resonant frequency that matches the wireless energy transmission coil 12, and finally transmit it to the load device 4 such as the online monitoring device for its use, thereby achieving stable energy harvesting and transmission without being restricted by weather and batteries, and improving stability.

[0052] Preferably, in one embodiment of the power transmission system, there are multiple insulators 1, each of which is closely arranged along the first direction, and each of the wireless energy transmission coils 12 is oriented in the same direction. It is understood that by arranging the multiple insulators 1 in the first direction, the two wireless energy transmission coils 12 at the head and tail become receiving coils, while the wireless energy transmission coil 12 in the middle becomes a relay coil.

[0053] In an embodiment of an electric energy transmission system, the electric energy transmission system further includes a transmitting coil and a capacitor. The transmitting coil is connected in parallel with the capacitor to resonate. The transmitting coil and the capacitor are combined to transfer the electric energy transmitted by the wireless energy transmission coil 12 to the load device 4.

[0054] Specifically, the energy taking device 2 may be a high-frequency CT that takes energy through an AC conductor, and the frequency modulation device 3 may be an AC-AC frequency modulation device.

[0055] In combination with the above embodiments, in order to maximize the transmission efficiency of the wireless energy transmission coil 12, each coil should be in a high-frequency resonance state, and its angular frequency should meet the following requirements:

[0056] For the n-order wireless energy transmission coil 12, according to Kirchhoff's voltage law, the relationship between its voltage and current is as follows:

[0057] Among them, R1~R n is the self-resistance of each coil, L1~L n is the self-inductance of each coil, M ij is the mutual inductance of coil i and coil j, C1~C n is the compensation capacitance value of each coil in series, R l is the load resistance, U1 is the transmitting coil voltage, which is output by the AC-AC frequency modulation device 3, I1~I n is the current in the coil.

[0058] The input impedance of this system is Z at a given frequency f. f =U 1f / I 1f , therefore, the input impedance of the entire system at each frequency is:

[0059] Since the coil structure is the same, it can be considered that the inductance L1=L2=......=L n , R1=R2=......=R n , since the coils in insulator 1 are evenly arranged, the mutual inductance has the following relationship:

[0060] The mutual inductance can be calculated using the Newman integral formula:

[0061] The efficiency of the energy transfer system is calculated as follows:

[0062] The output power of the energy transmission system is:

[0063] The following example uses six insulators 1. As shown in the figure, the six insulators 1 are arranged end to end and integrated. The two wireless energy transmission coils 12 at the head and tail are receiving coils, and the wireless energy transmission coils 12 in the middle are four relay coils. In this way, the power transmission system draws power from the transmission line through a high-frequency CT, modulates the obtained AC power frequency into a resonant frequency that matches the parameters of the wireless energy transmission coils 12 through the AC-AC frequency modulation device 3, and then transmits it to the first transmitting coil. The transmitting coil is connected in parallel with a capacitor and resonates under the action of the AC power at the resonant angular frequency.

[0064] Ignoring the resistance of the coil, the output voltage and output current expressions of the system are:

[0065] Where X = (ωL-1 / ωC), based on which the output current I6 and the output voltage U on the load can be solved o =I6R l .

[0066] Within a 50cm range, the system's maximum output efficiency is concentrated near the two frequencies of 17kHz and 25kHz, reaching over 70%, and the output power within this frequency band can reach approximately 60W. As shown in FIG3 , as the load resistance increases, the transmission efficiency of the wireless energy transmission coil 12 first increases rapidly and then slowly decreases. With increasing frequency, it first increases and then decreases, then increases again, and then decreases again. The transmission efficiency near 17kHz reaches over 80%, and there is also a peak transmission efficiency near 23kHz, but it is slightly lower than the efficiency near 17kHz, reaching a maximum of only over 60%. As shown in FIG4 , the variation pattern is consistent with that of FIG3 , with the maximum transmission power reaching over 60W, indicating that the power transmission power of the composite insulator 1 of the present invention can meet the power requirements of the tower online monitoring device. Furthermore, as shown in FIG5 , the magnetic field distribution of the insulator 1 of the present invention is more concentrated.

[0067] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The above embodiments merely illustrate several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An insulator with wireless power transmission function, characterized in that: The insulator comprises an insulating body and a wireless energy transmission coil, wherein the wireless energy transmission coil is wound around and encapsulated in the insulating body, the wireless energy transmission coil has a plurality of turns, and the diameter of each turn gradually increases along a first direction to form a concave shape.

2. The insulator with wireless power transmission function according to claim 1, characterized in that: The insulating body has an insulating wall whose diameter gradually increases along the first direction. The wireless energy transmission coil is wound along the first direction and encapsulated in the insulating wall. The shape of the wireless energy transmission coil matches that of the insulating wall, thereby forming a concave shape.

3. The insulator with wireless power transmission function according to claim 1 or 2, characterized in that: The interval between two adjacent coils of the wireless energy transmission coil along the first direction gradually increases.

4. The insulator with wireless power transmission function according to claim 1, characterized in that: The insulating body includes an insulating part, a steel cap and a steel foot. The insulating part has a head and a tail. The steel cap is sleeved on the head and fixed to the head. The side wall of the tail is the insulating wall. The steel foot is insulated and connected to the side of the insulating part away from the steel cap. The steel cap and the steel foot are both used for connecting two insulators or connecting the insulator to a hardware fitting.

5. The insulator with wireless power transmission function as claimed in claim 4, characterized in that: The insulating body also includes an elastic pad, which is arranged between the head and the steel cap and fills the gap between the head and the steel cap.

6. The insulator with wireless power transmission function according to claim 4, characterized in that: A groove is provided on the side of the insulating member facing away from the steel cap, and the groove extends to the head. Part of the steel foot extends into the groove and is connected to the side wall of the groove through cement packaging.

7. The insulator with wireless power transmission function according to claim 4 or 6, characterized in that: The insulating body also includes a locking pin, which is connected to the steel cap and the steel foot respectively, and is used to fix the position of the steel cap and the steel foot.

8. An electric energy transfer system, characterized in that: It comprises an energy collection device, a frequency modulation device and an insulator with wireless power transmission function as described in any one of claims 1 to 7, wherein the energy collection device is used to draw power from a transmission line, the frequency modulation device is electrically connected to the energy collection device and the wireless power transmission coil of the insulator, the frequency modulation device is used to modulate the frequency of the alternating current obtained by the energy collection device into a resonant frequency matching the wireless power transmission coil, and the wireless power transmission coil is used to transfer electrical energy to a load device.

9. The power transfer system according to claim 8, characterized in that: There are a plurality of insulators, each of which is closely arranged along the first direction, and each of the wireless energy transmission coils has the same orientation.

10. The power transfer system according to claim 8, characterized in that: The power transmission system also includes a transmitting coil and a capacitor. The transmitting coil is connected in parallel with the capacitor to generate resonance. The transmitting coil and the capacitor are combined to transfer the electric energy transmitted by the wireless power transmission coil to the load device.

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