Connection structure of flexible temperature measurement assembly and power conversion terminal

Abstract

The invention discloses a connection structure of a flexible assembly and a high-voltage power conversion terminal, and the structure comprises an outer coating layer, a flexible temperature measurement assembly, an electromagnetic shielding layer, an electrical isolation layer, a power conversion terminal, and an external pin. The flexible temperature measurement assembly, the electromagnetic shielding layer, the electrical isolation layer and the power conversion terminal are tightly contacted and combined layer by layer from top to bottom to form a hierarchical structure, and the hierarchical structure is completely covered by the outer coating layer; and the external pin is embedded between the electric isolation layer and the power conversion terminal. The connection structure provided by the invention has the characteristics of multi-point measurement, high temperature measurement accuracy, good stability and high response speed, and the connection method of the flexible temperature measurement assembly with long service life and the high-voltage power conversion terminal has the advantages of good flexible adaptation function, corrosion resistance, electromagnetic interference resistance, high electrical insulation and high heat conduction capability, wide applicability and high reliability. The temperature change condition of the conversion terminal on the power transmission line can be better monitored, and a guarantee is provided for intelligent operation and maintenance of the power transmission line.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of power transmission detection, and particularly relates to a connecting structure of a flexible temperature measuring assembly and a power adapter terminal. BACKGROUND

[0002] The power adapter terminal is an important hardware of a high-voltage transmission line and is also an important part of ensuring the safety of the transmission line. The terminal is used outdoors for a long time under very harsh working conditions, but because of continuous work, the hardware is prone to failure when overheating, thereby causing a fault and affecting the safety of the transmission line. Therefore, the development of an intelligent sensing detection device can continuously and effectively monitor the operation of the power grid and timely solve power faults. The currently used monitoring device is extremely simple, and the connection method with the terminal is rigidly fixed, the contact is not close enough, the state sensing is missing and the stability is insufficient, the temperature measurement accuracy is poor and the service life is short. The above problems are closely related to the type of the sensor and the connecting structure of the sensor and the adapter terminal.

[0003] In view of the above problems, a connecting structure of a flexible assembly and a high-voltage power adapter terminal is developed, which has the advantages of flexible adaptation, accurate temperature measurement, high sensitivity, good stability, anti-electromagnetic interference, corrosion resistance, long service life, and can monitor the operation of the power adapter terminal in real time, so as to improve the operation reliability and intelligent operation and maintenance level of the transmission line. SUMMARY

[0004] Therefore, the purpose of the application is to provide a connecting structure of a flexible temperature measuring assembly and a power adapter terminal.

[0005] The technical scheme provided by the application is a connecting structure of a flexible assembly and a high-voltage power adapter terminal, which comprises an outer cladding layer, a flexible temperature measuring assembly, an electromagnetic shielding layer, an electrical isolation layer, a power adapter terminal and an external pin. The flexible temperature measuring assembly, the electromagnetic shielding layer, the electrical isolation layer and the power adapter terminal are sequentially and closely contacted and combined as a hierarchical structure from top to bottom, and the outer cladding layer is arranged on the flexible temperature measuring assembly to completely cover the hierarchical structure. The external pin is embedded between the electrical isolation layer and the power adapter terminal.

[0006] Preferably, the connecting structure further comprises buckles, and two buckles are arranged at both ends of the outer cladding layer to tightly fix the outer cladding layer and the power adapter terminal.

[0007] Preferably, the buckles are made of stainless steel strips with a width of 3-10 mm, and the buckle pressure is controlled at 0.1-0.3 MPa.

[0008] Preferably, the electromagnetic shielding layer is made of high-purity aluminum foil with a thickness of 0.05-0.1 mm, a thermal diffusion coefficient greater than 0.1 cm2 / s and an electromagnetic shielding effectiveness greater than 70 dB. ​

[0009] Preferably, the high-purity aluminum foil surface is provided with a hot-dip galvanized layer with a thickness of 5-20 um.

[0010] Preferably, the electrically isolating layer adopts boron nitride nanosheets with a thickness of 100-500 um, a volume resistivity of > 1012 ohm-cm, a breakdown strength of > 300 kV / mm, and a thermal conductivity of 10-20 W / mK. Preferably, the outer cladding layer is provided with a thin polyimide film or a fluorocarbon coating with a thickness of 0.1-0.5 mm.

[0011] Preferably, the outer cladding layer adopts phenyl silicone rubber with a thickness of greater than 3-10 mm and a Shore hardness of 50-60A and a tensile rate of > 150%.

[0012] Preferably, the outer cladding layer adopts phenyl silicone rubber with a thickness of greater than 3-10 mm and a Shore hardness of 50-60A and a tensile rate of > 150%.

[0013] Preferably, the electromagnetic shielding layer is consistent in size with the electrically isolating layer, and the electromagnetic shielding layer is larger in size than the flexible temperature measurement assembly.

[0014] The present application provides a connection structure of a flexible temperature measurement assembly and a power adapter terminal, which realizes effective and stable connection of the flexible temperature measurement assembly and the power adapter terminal through the multi-layer structure cooperation of the outer cladding layer, the flexible temperature measurement assembly, the electromagnetic shielding layer, and the electrically isolating layer.

[0015] The present application provides a connection structure of a flexible temperature measurement assembly and a power adapter terminal, which realizes effective and stable connection of the flexible temperature measurement assembly and the power adapter terminal through the multi-layer structure cooperation of the outer cladding layer, the flexible temperature measurement assembly, the electromagnetic shielding layer, and the electrically isolating layer. BRIEF DESCRIPTION OF DRAWINGS

[0016] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings needed to be used in the embodiments or prior art description will be briefly introduced. Obviously, those skilled in the art can obtain other drawings from these drawings without creative effort.​

[0018] Fig. 1 This is a schematic diagram of the overall structure of the flexible temperature measuring component and the power conversion terminal provided by the present invention.

[0019] Fig. 2 This is a schematic diagram of the ring buckle described in an embodiment of the present invention;

[0020] Fig. 3 This is a schematic diagram of the overall structure of the flexible temperature measuring component with external terminals provided by the present invention, connected to a power conversion terminal. Detailed Implementation

[0021] The present invention will be further explained below with reference to specific implementation schemes, but this explanation does not limit the scope of the invention.

[0022] To overcome the shortcomings of existing rigid power transfer terminals, such as poor adaptability, lack of status monitoring, and insufficient monitoring stability, this invention provides a connection structure between a flexible component and a high-voltage transmission line power transfer terminal. This structure features flexible adaptability, accurate temperature measurement, high sensitivity, good stability, resistance to electromagnetic interference, corrosion resistance, long lifespan, and the ability to monitor the operating status of the power transfer terminal in real time.

[0023] like Figs. 1-3 As shown, it includes: an outer covering layer 1, a flexible temperature measuring component 2, an electromagnetic shielding layer 3, an electrical isolation layer 4, a power conversion terminal 5, and a snap fastener 6.

[0024] The flexible component 2, electromagnetic shielding layer 3, electrical isolation layer 4, and power conversion terminal 5 are tightly bonded together layer by layer in a top-to-bottom order, and the entire exterior is completely covered by the outer covering layer 1. The electromagnetic shielding layer 3 of the flexible temperature sensing element 2 is directly pressed into contact with the upper surface of the electrical isolation layer 4, and the contact is tight. The lower surface of the electrical isolation layer 4 is directly and tightly in contact with the power conversion terminal. That is, the electrical isolation layer 4 is located between the electromagnetic shielding layer 3 and the power conversion terminal 4, and the three are in direct and tight contact without any gaps. The flexible temperature sensing element 2 is in direct and tight contact with the upper surface of the isolation layer 3, but does not contact the power conversion terminal.

[0025] The electromagnetic shielding layer is larger than the flexible component; the electrical isolation layer 4 is the same size as the electromagnetic shielding layer 3.

[0026] The aforementioned flexible temperature sensing component 2 can be any commonly available flexible temperature sensing component that is readily available on the market.

[0027] Electrically insulating layer 4 is made of boron nitride nanosheets (BNNS) with a volume resistivity > Breakdown strength > 300 kV / mm, thermal conductivity Boron nitride nanosheets with a thickness of 0.1-0.5 mm are used; the boron nitride nanosheets have a wide range of high and low temperature resistance (-200℃-400℃).

[0028] The isolation layer 4 is not limited to using boron nitride graphene nanosheets; other materials with good electrical insulation and excellent heat dissipation performance can also be used.

[0029] The electrical isolation layer can also expose the terminals, allowing for the measurement of temperature at other nearby locations after connecting external wires;

[0030] Electromagnetic shielding layer 3 is made of high-purity aluminum foil, with a thickness of 0.05-0.1 mm and a thermal diffusivity greater than 100%. The electromagnetic shielding effectiveness is greater than 70dB; the electromagnetic shielding layer 3 is made of high-purity aluminum foil with a hot-dip galvanizing treatment of 5-20um; the electromagnetic shielding layer 3 is not limited to high-purity aluminum foil, and other materials such as copper foil can also be used.

[0031] The outer coating layer 1 is made of phenyl silicone rubber with a thickness greater than 3-10 mm, a Shore hardness of 50-60 A, and an elongation of ≥150%.

[0032] A thin polyimide film or fluorocarbon coating with a thickness of 0.1-0.5 mm can be added to the outside of the outer covering layer 1;

[0033] Depending on the voltage, other types of insulating silicone can be used for the outer coating.

[0034] like Fig. 2 As shown, the buckle is a ring buckle. The buckle 6 is used to firmly fix the covering layer to the power conversion terminal 5 at both ends. Alternatively, 1-2 buckles can be added to the flexible temperature measuring component to ensure that the middle of the flexible component is compacted and there are no gaps between the layers.

[0035] The buckle 6 is made of stainless steel strip with a strip width of 3mm-10mm and a buckle pressure controlled at 0.1-0.3 MPa.

[0036] External pin 7 can be connected to other locations that need to be measured via wires;

[0037] The connection and assembly method of the above-mentioned flexible temperature sensing component and its connection structure with the power conversion terminal specifically includes the following steps:

[0038] 1) Pre-treatment of each structural component: Boron nitride nanosheets with a thickness of 0.1-0.5mm are selected as the electrical isolation layer 4; high-purity aluminum foil with a thickness of 0.05-0.1mm and a surface treated with 5-20μm hot-dip galvanization is selected as the electromagnetic shielding layer 3; phenyl silicone rubber is selected as the substrate of the outer coating layer 1 with a thickness of 3-10mm, a Shore hardness of 50-60A, and an elongation of ≥150%; and stainless steel strip with a width of 3mm-10mm is selected as the buckle 6.

[0039] 2) Layer-by-layer bonding and assembly: The lower surface of the electrical isolation layer 4 is tightly bonded to the contact surface of the power conversion terminal 5. Then, the electromagnetic shielding layer 3 is laid on the upper surface of the electrical isolation layer 4 and compacted to ensure that there is no gap between the electromagnetic shielding layer 3 and the electrical isolation layer 4. Subsequently, the flexible temperature measuring component 2 is laid on the upper surface of the electromagnetic shielding layer 3 and pressed into contact. This completes the layer-by-layer tight bonding and assembly of the flexible temperature measuring component 2, the electromagnetic shielding layer 3, the electrical isolation layer 4, and the power conversion terminal 5, ensuring that each layer is tightly bonded and there are no gaps.

[0040] 3) Overall Encapsulation: An outer encapsulation layer 1 made of phenyl silicone rubber is used to completely encapsulate the above-mentioned stacked flexible temperature sensing component 2, electromagnetic shielding layer 3, electrical isolation layer 4, and power transfer terminal 5, so that the exterior of each layer is completely covered by the outer encapsulation layer 1, and the middle part of the flexible temperature sensing component 2 is compacted to ensure that there are no gaps between the layers after encapsulation; optionally, a thin polyimide film or fluorocarbon coating with a thickness of 0.1-0.5mm is added to the outside of the outer encapsulation layer 1 to improve the protective performance;

[0041] 4) Snap-fit ​​type: Install the snap-fit ​​6 made of stainless steel strip at both ends of the power adapter terminal 5 to firmly fix the outer covering layer 1. The clamping force of the snap-fit ​​is controlled at 0.1-0.3MPa. After tightening, ensure that the middle part of the flexible temperature measuring component 2 remains compacted and there are no gaps between the layers, thus completing the connection and fixation of the overall structure.

[0042] 5) External pin connection: Lead out the external pin 7 with a wire, and connect it to other locations to be measured according to the temperature measurement requirements to complete the assembly of the entire flexible temperature measurement component and the power conversion terminal connection structure.

[0043] When this structure is used for temperature measurement, the power transfer terminal 5 is connected to the power system and powered on. The power terminal generates operating temperature due to current conduction. The temperature is conducted through the power terminal body to the bonding surface with the electrical isolation layer 4, and then through the electrical isolation layer 4 to the electromagnetic shielding layer 3 to complete the heat conduction. Finally, the heat is conducted to the heat-sensitive area of ​​the flexible temperature measuring component 2. During the heat conduction process, there are no gaps between the layers, and the thermal conductivity is 100%, matching the structural design parameters.

[0044] After receiving the conducted heat, the flexible temperature sensing component 2 generates a corresponding change in electrical signal (resistance / voltage / current change, adapting to the general characteristics of conventional flexible temperature sensing elements). The generated temperature sensing electrical signal is exported through the reserved external pin 7 and transmitted stably through the connected wires. There is no signal attenuation during the transmission process, and it directly reaches the external temperature acquisition device.

[0045] This invention employs a connection method between a flexible component with high temperature measurement accuracy and long lifespan and a high-voltage power transfer terminal. It features excellent flexibility, corrosion resistance, electromagnetic interference resistance, high electrical insulation, and high thermal conductivity, making it widely applicable. It can better monitor the temperature changes of the transfer terminals on power transmission lines, providing a guarantee for the intelligent operation and maintenance of power transmission lines.

[0046] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0047] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A connection structure between a flexible component and a high-voltage power transfer terminal, characterized in that, include: The outer covering layer (1), flexible temperature measuring component (2), electromagnetic shielding layer (3), electrical isolation layer (4), power conversion terminal (5), and external pin (7) are tightly connected in a hierarchical structure in a top-to-bottom order. The outer covering layer (1) is placed on the flexible temperature measuring component (2) and completely covers the hierarchical structure. The external pin (7) is embedded between the electrical isolation layer (4) and the power conversion terminal (5).

2. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, Includes two buckles (6), which are respectively installed at both ends of the outer covering layer (1) to tightly fix the outer covering layer (1) to the power conversion terminal (5).

3. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 2, characterized in that, The buckle (6) is made of stainless steel strip with a strip width of 3mm-10mm and the buckle pressure is controlled at 0.1-0.3 MPa.

4. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The electromagnetic shielding layer (3) is made of high-purity aluminum foil with a thickness of 0.05-0.1 mm and a thermal diffusivity greater than 100%. The electromagnetic shielding effectiveness is greater than 70dB.

5. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 4, characterized in that, The high-purity aluminum foil has a hot-dip galvanized layer on its surface, with a layer thickness of 5-20 μm.

6. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The electrical isolation layer (4) is made of boron nitride nanosheets with a thickness of 100~500 μm and a volume resistivity >10¹⁶. Breakdown strength > 300 kV / mm, thermal conductivity 300~400 kV / mm It has a wide temperature range of -200℃ to 400℃.

7. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The outer covering layer (1) is provided with a thin polyimide film or fluorocarbon coating with a coating thickness of 0.1-0.5 mm.

8. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The external pin (7) is connected to the position to be measured via a wire.

9. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The outer coating layer (1) is made of phenyl silicone rubber with a thickness greater than 3-10 mm, a Shore hardness of 50-60 A, and an elongation of ≥150%.

10. The connection structure between the flexible component and the high-voltage power transfer terminal according to claim 1, characterized in that, The electromagnetic shielding layer (3) is the same size as the electrical isolation layer (4), and the size of the electromagnetic shielding layer (3) is larger than that of the flexible temperature measuring component (2).

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