Lightning protection temperature sensor, temperature detection device and fan blade deicing system

Abstract

The invention discloses a lightning protection temperature sensor, a temperature detection device and a fan blade deicing system.The lightning protection temperature sensor comprises a metal shell, a detection assembly and an insulation fixing assembly, a shielding inner cavity is formed in the metal shell, and a thermistor of the detection assembly is arranged at the bottom of the shielding inner cavity; the first ends of the two shielding signal lines are connected with the two pins of the thermistor in a one-to-one correspondence mode, the second ends of the two shielding signal lines extend out of the metal shell, an insulating partition plate of the insulating fixing assembly is arranged between the two pins, and the first insulating supporting piece and the second insulating supporting piece are arranged in the wire passing opening and the shielding inner cavity in a one-to-one correspondence mode. The two pins and the two shielding signal lines are arranged in the shielding inner cavity and can penetrate through the shielding inner cavity, and the insulating filler is filled in the shielding inner cavity, so that the two pins and the two shielding signal lines are not too close due to extrusion in the process of injecting the insulating filler. Therefore, the phenomenon of easy damage caused by overvoltage of inductive thunder and static electricity due to insufficient insulation distance can be avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of temperature detection, and in particular relates to a lightning protection temperature sensor, a temperature detection device and a fan blade deicing system. Background Art

[0002] Wind energy is a clean, pollution-free renewable energy source and has become an important part of new energy. In recent years, the proportion of wind power generation in the total electricity generation has continued to rise. Wind farms are mostly located in high-altitude, micro-meteorological and micro-topographic areas, and wind turbines generally have the problem of freezing in winter.

[0003] At present, the relatively mature technology for wind turbine blade anti-icing and deicing is gas-heat deicing technology. Gas-heat deicing technology uses high-power air blowing equipment to transport heated hot air into the inner cavity of the blade, forming an inner cavity heat cycle, and melting the ice layer on the outer surface of the blade through heat conduction from the blade. It is a safe and effective method for deicing wind turbine blades. However, wind turbines are towering and protruding from wind farms, making the internal gas-heat deicing system of the wind turbine extremely vulnerable to lightning strikes, especially the temperature sensors installed in the blades to feedback the temperature rise of the blades. The temperature measurement points are often arranged in the inner cavity of the leading edge of the blades. The temperature sensor transmission line is long and is easily affected by induced lightning. The temperature sensor probe is also easily damaged by induced lightning and static overvoltage. Summary of the invention

[0004] In view of the above-mentioned defects or shortcomings, the present invention provides a lightning protection temperature sensor, a temperature detection device and a fan blade deicing system, aiming to solve the technical problem that the temperature sensor probe installed in the blade is easily damaged by induced lightning and static electricity overvoltage.

[0005] To achieve the above-mentioned purpose, the first aspect of the present invention provides a lightning protection temperature sensor, wherein the lightning protection temperature sensor includes a metal shell, a detection component and an insulating fixed component; the metal shell forms a shielded inner cavity with a wire passing port; the detection component includes a thermistor and two shielded signal lines, the thermistor is placed at the bottom of the shielded inner cavity and is spaced apart from the metal shell, the two shielded signal lines are relatively spaced apart, and the first ends of the two shielded signal lines are respectively connected to the two pins of the thermistor in a one-to-one correspondence, and the second ends both extend out of the metal shell from the wire passing port; the insulating fixed component includes an insulating partition, an insulating filler, a first insulating support and a second insulating support, the insulating partition is placed between the two pins, the first insulating support and the second insulating support are respectively arranged in the wire passing port and the shielded inner cavity in a one-to-one correspondence, and both can be used for the two shielded signal lines to pass through, and the shielded inner cavity is filled with insulating fillers to wrap the detection component and isolate the detection component and the metal shell.

[0006] In one embodiment of the present invention, the insulating fixing assembly also includes an insulating thermally conductive sheath having insulating thermal conductivity, the insulating thermally conductive sheath is placed between the thermistor and the metal shell, and the insulating filler can wrap the insulating thermally conductive sheath so that the insulating thermally conductive sheath is isolated from the thermistor and the metal shell respectively.

[0007] In one embodiment of the present invention, the insulating thermally conductive sheath is placed at the bottom of the shielding cavity and forms a sheath space. The sheath space is open at one end close to the wire opening for the thermistor to extend into the sheath space, and is closed at one end away from the wire opening.

[0008] In one embodiment of the present invention, the insulating filler includes an insulating thermally conductive filler and an insulating fixed filler. The insulating thermally conductive filler is filled on the outside of the sheath space and is located between the insulating thermally conductive sheath and the metal shell to isolate the insulating thermally conductive sheath and the metal shell. The insulating fixed filler fills the inside of the sheath space and the shielding inner cavity located on the open side of the sheath space to respectively isolate the insulating thermally conductive sheath from the thermistor and the shielded signal line from the metal shell. The thermal conductivity of the insulating thermally conductive filler is greater than the thermal conductivity of the insulating solid filling material, and the insulation coefficient of the insulating fixed filler is greater than the insulation coefficient of the insulating thermally conductive filler.

[0009] In one embodiment of the present invention, both pins are provided with insulating heat shrink tubes, and / or the thickness of the insulating partition is designed as follows:

[0010]

[0011] In the formula, D is the thickness of the insulating partition, mm; α is the margin coefficient, which is 1.5 for equipment installed in low-lightning areas and 2.0 for equipment installed in high-lightning areas; E1 is the breakdown field strength required by the insulation level, (V / mm); E2 is the electric field strength, (V / m); ∈ is the relative dielectric constant.

[0012] In one embodiment of the present invention, the metal shell includes a metal tube body, a threaded mounting body and a nut member. The metal tube body forms a shielding inner cavity. The threaded mounting body is sleeved on the outer side of the metal tube body near the wire passing opening, and a first external thread threadedly connected to the nut member is formed on the threaded mounting body so that it can be fastened and installed by the nut member.

[0013] In one embodiment of the present invention, the lightning protection temperature sensor also includes a plug assembly, the plug assembly includes a plug body, a sheath layer and a shielding layer, the metal tube body is formed with a second external thread on the outer periphery between the wire passing port and the threaded mounting body, the plug body cover is arranged on the metal tube body and is threadably connected to the second external thread, two shielded signal lines are arranged through the plug body, and one of the shielded signal lines is split into a first signal line and a second signal line, the signal line extending from the plug body is sequentially covered with a shielding layer and a sheath layer from the inside to the outside, and a shielding lead wire is connected between the nut member and the shielding layer.

[0014] In one embodiment of the present invention, the insulating fixing assembly also includes a third insulating support member, and the first insulating support member, the second insulating support member and the third insulating support member are arranged in sequence from the wire passing opening along the length direction of the metal tube body, and the second insulating support member is arranged corresponding to the threaded mounting body, and the first insulating support member, the second insulating support member and the third insulating support member are each formed with two threading holes for two shielded signal lines to pass through respectively, and the second insulating support member and the third insulating support member are also formed with glue injection holes for injecting insulating filler.

[0015] To achieve the above-mentioned purpose, the second aspect of the present invention provides a temperature detection device, wherein the temperature detection device includes a temperature acquisition unit, a photoelectric isolation device, a remote surge protection device and a proximal surge protection device connected in sequence through a shielded signal line, and the lightning protection temperature sensor described above, the number of lightning protection temperature sensors is at least two, at least two lightning protection temperature sensors are arranged in parallel, and the shielded signal line between the proximal surge protection device and the lightning protection temperature sensor does not exceed 1.5 meters, the proximal surge protection device is set as a bidirectional signal surge protector, and the shielded signal line between the remote surge protection device and the temperature acquisition unit does not exceed 1.5 meters.

[0016] To achieve the above objective, a third aspect of the present invention provides a fan blade deicing system, wherein the fan blade deicing system comprises the temperature detection device described above.

[0017] Through the above technical solution, the lightning protection temperature sensor provided by the present invention has the following beneficial effects:

[0018] When the above-mentioned lightning protection temperature sensor is used, since it includes an insulating fixing component, the first insulating support member and the second insulating support member in the insulating fixing component can pre-install the shielded signal line on the metal shell and isolate it from the metal shell. The insulating filler is filled in the shielding inner cavity, which can not only fix the components in the shielding inner cavity, but also due to the wrapping of the detection component, it can further ensure that the thermistor and the shielded signal line in the detection component are respectively insulated and isolated from the metal shell. In addition, placing an insulating partition between the two pins can not only enhance the insulation performance between the two pins, but also ensure that during the injection of the insulating filler, the two pins and the two shielded signal lines will not be too close due to squeezing, thereby avoiding the phenomenon of being easily damaged by induced lightning and static overvoltage due to insufficient insulation distance, so as to achieve the purpose of enhancing the lightning protection performance of the lightning protection temperature sensor.

[0019] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings are used to provide a further understanding of the embodiments of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the embodiments of the present invention, but do not constitute a limitation on the embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative work. In the accompanying drawings:

[0021] Figure 1 is a schematic diagram of the structure of a lightning protection temperature sensor inside a metal casing according to an embodiment of the present invention;

[0022] Figure 2 is a schematic structural diagram of a lightning protection temperature sensor according to an embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the structure of a temperature detection device according to an embodiment of the present invention.

[0024] Description of reference numerals:

[0025] 100 Metal shell 110 Metal tube

[0026] 120 threaded mounting body 130 nut

[0027] 200 Thermistor 300 Shielded signal line

[0028] 400 Insulating spacer 500 First insulating support

[0029] 600 Second insulating support member 700 Third insulating support member

[0030] 800 Insulation Thermal Sheath 900 Plug Assembly

[0031] 910 Plug body 920 Sheath layer

[0032] 930 Shielding layer 940 Shielding lead wire

[0033] 10 Temperature acquisition unit 20 Photoelectric isolation device

[0034] 30 Remote surge protection device 40 Near-end surge protection device

[0035] 50 Lightning protection temperature sensor DETAILED DESCRIPTION

[0036] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0037] The lightning protection temperature sensor, temperature detection device and fan blade deicing system of the present invention are described below with reference to the accompanying drawings.

[0038] like Figure 1 As shown, the present invention provides a lightning protection temperature sensor, wherein the lightning protection temperature sensor 50 includes:

[0039] The metal shell 100 forms a shielding inner cavity with a wire passing opening;

[0040] The detection component includes a thermistor 200 and two shielded signal wires 300. The thermistor 200 is placed at the bottom of the shielded inner cavity and is spaced apart from the metal shell 100. The two shielded signal wires 300 are spaced apart from each other. The first ends of the two shielded signal wires 300 are respectively connected to the two pins of the thermistor 200 in a one-to-one correspondence, and the second ends of the two shielded signal wires 300 are both extended out of the metal shell 100 from the wire passing port.

[0041] The insulating fixed assembly includes an insulating partition 400, an insulating filler, a first insulating support member 500 and a second insulating support member 600. The insulating partition 400 is placed between two pins. The first insulating support member 500 and the second insulating support member 600 are respectively arranged in the line passing port and the shielding inner cavity in a one-to-one correspondence, and both can allow two shielded signal lines 300 to pass through. The shielding inner cavity is filled with insulating fillers to wrap the detection assembly and isolate the detection assembly from the metal shell 100.

[0042] When the above-mentioned lightning protection temperature sensor is used, since it includes an insulating fixing component, the first insulating support member 500 and the second insulating support member 600 in the insulating fixing component can pre-install the shielded signal line 300 on the metal shell 100 and isolate it from the metal shell 100. The insulating filler is filled in the shielding inner cavity, which can not only fix the components in the shielding inner cavity, but also due to the wrapping of the detection component, it can further ensure that the thermistor 200 and the shielded signal line 300 in the detection component are respectively insulated and isolated from the metal shell 100. In addition, placing the insulating partition 400 between the two pins can not only enhance the insulation performance between the two pins, but also ensure that during the injection of the insulating filler, the two pins and the two shielded signal lines 300 will not be too close due to squeezing, thereby avoiding the phenomenon of being easily damaged by induced lightning and static overvoltage due to insufficient insulation distance, so as to achieve the purpose of enhancing the lightning protection performance of the lightning protection temperature sensor 50.

[0043] Specifically, the metal housing 100 can be connected to the ground wire to play a shielding role. The thermistor 200 is generally made of a thermistor platinum resistor with a resistance value of about 100Ω. This type of platinum resistor is very small in size, and the distance between the two pins of the resistor is generally not more than 5mm. In the general glue filling and fixing process, it is very easy to cause the distance between the two pins to be too tight, which easily leads to insufficient insulation distance between the two and withstand overvoltage caused by induced lightning. The present invention enhances the insulation coefficient between the two pins by adding an insulating partition 400 between the two pins. While enhancing the insulation, it can also ensure that during the injection of the insulating filler, the distance between the two pins and the two shielded signal lines 300 will not be too close due to squeezing.

[0044] More specifically, the insulating partition 400, the insulating filler, the first insulating support 500 and the second insulating support 600 are all configured to have insulating properties, and the insulating partition 400, the first insulating support 500 and the second insulating support 600 may also have high temperature resistance, and may specifically be suitable plastic parts to ensure structural stability when the high-temperature insulating filler is injected.

[0045] Please see again Figure 1In one embodiment of the present invention, the insulating fixing assembly further includes an insulating thermally conductive sheath 800 having insulating thermal conductivity, and the insulating thermally conductive sheath 800 is placed between the thermistor 200 and the metal shell 100, and the insulating filler can wrap the insulating thermally conductive sheath 800, so that the insulating thermally conductive sheath 800 is isolated from the thermistor 200 and the metal shell 100 respectively. When the size of the bottom of the shielding cavity is large, if the metal shell 100 and the thermistor 200 are completely filled with insulating fillers, and the thermal conductivity of the insulating fillers is general, which will lead to a decrease in the temperature measurement accuracy of the thermistor 200, then an insulating thermally conductive sheath 800 is added between the thermistor 200 and the metal shell 100. Since the insulating thermally conductive sheath 800 has excellent thermal conductivity, the purpose of improving the temperature measurement accuracy can be achieved.

[0046] Specifically, since the temperature measurement point of the fan blade is often arranged in the air duct or the inner cavity of the leading edge, there is a certain distance between the temperature measurement point and the fixed position, and the temperature measurement point inside the air duct needs to withstand high wind pressure, the metal shell 100 is generally set to a tubular shape with a larger diameter and thicker wall thickness. At this time, if the thermistor 200 and the metal shell 100 are completely filled with insulating fillers, it is bound to cause the temperature measurement accuracy of the thermistor 200 to decrease. In view of the above problems, the present invention adds an insulating thermally conductive sheath 800 between the thermistor 200 and the metal shell 100. Since the insulating thermally conductive sheath 800 has excellent thermal conductivity, it can achieve the purpose of improving the temperature measurement accuracy. More specifically, the insulating thermally conductive sheath 800 is made of an insulating material that is resistant to high temperatures and has good thermal conductivity, and can be made of Teflon, peek material or other insulating materials with equivalent insulation and heat resistance.

[0047] In one embodiment of the present invention, the insulating heat-conductive sheath 800 is placed at the bottom of the shielding inner cavity and forms a sheath space. The end of the sheath space close to the wire-passing opening is open to allow the thermistor 200 to extend into the sheath space, and the end of the sheath space away from the wire-passing opening is closed. That is, the insulating heat-conductive sheath 800 is set to be an open tubular shape. Except for the open part, the rest of the part can transfer heat to the thermistor group to achieve the purpose of improving the heat transfer effect. Specifically, the metal shell 100 includes a metal tube body 110 forming a shielding inner cavity. The bottom of the metal tube body 110 is set to be partially spherical, such as a hemispherical shape. The insulating heat-conductive sheath 800 is shaped like the metal tube body 110 and has a partially spherical bottom. In addition, one side of the thermistor 200 with two pins is arranged toward the open opening and the wire passing opening, and the side of the thermistor 200 away from the two pins is arranged toward the bottom of the insulating thermally conductive sheath 800, which is used to increase the heat transfer area, and the two pins in the thermistor 200 do not extend out of the insulating thermally conductive sheath 800.

[0048] In one embodiment of the present invention, the insulating filler includes an insulating thermally conductive filler and an insulating fixed filler. The insulating thermally conductive filler is filled on the outside of the sheath space and is located between the insulating thermally conductive sheath 800 and the metal shell 100 to isolate the insulating thermally conductive sheath 800 and the metal shell 100. The insulating fixed filler fills the inside of the sheath space and the shielding inner cavity located on the open side of the sheath space to respectively isolate the insulating thermally conductive sheath 800 from the thermistor 200 and the shielded signal line 300 from the metal shell 100. The thermal conductivity of the insulating thermally conductive filler is greater than the thermal conductivity of the insulating fixed filler, and the insulation coefficient of the insulating fixed filler is greater than the insulation coefficient of the insulating thermally conductive filler. By selecting an insulating thermally conductive filler with a higher thermal conductivity as the insulating filler between the insulating thermally conductive sleeve 800 and the metal shell 100, the heat transfer effect between the insulating thermally conductive sleeve 800 and the metal shell 100 can be further improved, and when the sensor is assembled, the filling of the two insulating fillers is also relatively convenient, specifically: first inject the insulating thermally conductive filler heated to a first temperature value to become a gel into the bottom of the shielding cavity; then put the insulating thermally conductive sleeve 800 in to adhere to the insulating thermally conductive filler; then assemble the detection component, the insulating partition 400 and the insulating support on the metal shell 100, and finally inject the insulating fixed filler heated to a second temperature value to become a gel into the shielding cavity through the glue injection hole on the insulating support.

[0049] Furthermore, when selecting the material of the insulating thermal conductive filler, the priority of thermal conductivity and fluidity before curing should be higher than insulation. Its main function is to ensure that the insulating thermal conductive sheath 800 is in full contact with the metal shell 100, and can effectively transfer heat from the external environment. The insulating thermal conductive filler can be made of insulating thermal conductive silicone and other materials, and the insulating fixed filler can be made of Kraft K-9741 and other materials.

[0050] In one embodiment of the present invention, the thermal conductivity of the insulating thermally conductive filler is not less than 12 W / m·K, and the dielectric strength kV / mm≥15, and / or the thermal conductivity of the insulating fixed filler is not less than 7 W / m·K, and the dielectric strength kV / mm≥22. ​​That is, the thermal conductivity of the insulating thermally conductive filler can be set higher than the thermal conductivity of the insulating fixed filler, and the dielectric strength of the insulating fixed filler can be set higher than the dielectric strength of the insulating thermally conductive filler.

[0051] In one embodiment of the present invention, both pins are sleeved with insulating heat shrink tubes. The addition of insulating heat shrink tubes on the pins can further prevent the pins from being squeezed too close during the glue pouring process.

[0052] In one embodiment of the present invention, the thickness of the insulating spacer 400 is designed as follows:

[0053]

[0054] In the formula, D is the thickness of the insulating partition 400, mm; α is the margin coefficient, which is 1.5 for equipment installed in low-lightning areas and 2.0 for equipment installed in high-lightning areas; E1 is the breakdown field strength required by the insulation level, (V / mm); E2 is the electric field strength, (V / m); ∈ is the relative dielectric constant.

[0055] Specifically, the main purpose of the insulating partition 400 is to effectively block the induced lightning overvoltage under the highest lightning strike level. The thickness of the insulating partition 400 is related to the insulation performance, and specifically should be determined to be able to withstand the maximum lightning strike voltage that the wind turbine blades may withstand during operation.

[0056] See also Figure 1 and Figure 2 In one embodiment of the present invention, the metal housing 100 includes a metal tube body 110, a threaded mounting body 120 and a nut member 130. The metal tube body 110 forms a shielding inner cavity. The threaded mounting body 120 is sleeved on the outer side of the metal tube body 110 near the wire-passing opening, and a first external thread threadedly connected to the nut member 130 is formed on the threaded mounting body 120, so that it can be fastened and installed by the nut member 130. That is, by adding the threaded mounting body 120 and the nut member 130 on the metal tube body 110, it can be convenient to disassemble and assemble the sensor. Specifically, a mounting hole for the threaded mounting body 120 to pass through can be opened on the structure to be installed, and the mounting hole can be threadedly connected to the first external thread, and then the nut member 130 is sleeved on the threaded mounting member and tightened until it abuts against the structure to be installed.

[0057] In one embodiment of the present invention, the lightning protection temperature sensor 50 also includes a plug assembly 900, which includes a plug body 910, a sheath layer 920 and a shielding layer 930. The metal tube body 110 is formed with a second external thread on the outer periphery between the wire passing port and the threaded mounting body 120. The plug body 910 is covered on the metal tube body 110 and is threadedly connected to the second external thread, and the plug body 910 can be tightened to abut against the threaded mounting body 120, thereby achieving a cover on the metal tube body 110. Two shielded signal lines 300 are arranged through the plug body 910, and one of the shielded signal lines 300 is split into a first signal line and a second signal line, so that it can finally be led out through three signal lines. The signal line extending from the plug body 910 is sequentially covered with a shielding layer 930 and a sheath layer 920 from the inside to the outside, and a shielded lead-out line 940 is connected between the nut member 130 and the shielding layer 930. The sheath layer 920 can be made of insulating material to play a protective role. The shielding layer 930 can be a metal mesh braided layer. The shielding layer 930 can play a certain grounding protection role. If the signal line is damaged, the leakage current can flow into the grounding grid along the shielding layer 930 to play a safety protection role. In addition, the addition of the shielding lead wire 940 can set a separate grounding point for the metal shell 100.

[0058] Please see again Figure 1 In one embodiment of the present invention, the insulating fixing assembly further includes a third insulating support 700, the first insulating support 500, the second insulating support 600 and the third insulating support 700 are sequentially arranged from the wire-passing opening along the length direction of the metal tube body 110, and the second insulating support 600 is arranged corresponding to the threaded mounting body 120, and the first insulating support 500, the second insulating support 600 and the third insulating support 700 are each formed with two threading holes for two shielded signal wires 300 to pass through one by one, that is, by adding two threading holes on each insulating support, the distance between the two shielded signal wires 300 and the distance between each shielded signal wire 300 and the metal shell 100 can be ensured. In addition, the second insulating support 600 and the third insulating support 700 are each formed with injection holes for injecting insulating fillers, that is, the insulating fillers can be injected into the shielding inner cavity within the second insulating support 600 through the injection holes, so that most of the shielded signal wires 300 in the shielding inner cavity can be wrapped by the insulating fillers. Specifically, the first insulating support member 500 , the second insulating support member 600 and the third insulating support member 700 can all be clamped on the inner wall of the metal tube body 110 .

[0059] In addition, see Figures 1 to 3The present invention also provides a temperature detection device, wherein the temperature detection device includes a temperature acquisition unit 10, a photoelectric isolation device 20, a remote surge protection device 30 and a near-end surge protection device 40 connected in sequence through a shielded signal line 300, and according to the lightning protection temperature sensor described above, the number of lightning protection temperature sensors 50 is at least two, and at least two lightning protection temperature sensors 50 are arranged in parallel, that is, the accuracy of temperature measurement can be improved by arranging more than two temperature measurement points, the shielded signal line 300 between the near-end surge protection device 40 and the lightning protection temperature sensor 50 does not exceed 1.5 meters, the near-end surge protection device 40 is set as a bidirectional signal surge protection device, so that the near-end surge protection device 40 can protect the lightning current received at both ends, and two surge protection channels are used in parallel between the near-end surge protection device 40 and each signal line, and redundancy is set so that when one protection channel fails, another protection channel can be enabled to achieve the purpose of increasing the service life. In addition, the shielded signal line 300 between the remote surge protection device 30 and the temperature acquisition unit 10 is no longer than 1.5 meters. The addition of the photoelectric isolation device 20 allows the electrical signal transmitted by the sensor to be first converted into an optical signal, and then the optical signal is converted into an electrical signal and transmitted to the temperature acquisition unit 10, so that there is no direct current transmission between the sensor and the temperature acquisition unit 10. Even if lightning strikes the sensor, the temperature acquisition unit 10 will not be damaged. Specifically, a relatively long shielded signal line 300 is provided between the proximal surge protection device 40 and the remote surge protection device 30.

[0060] In addition, the present invention provides a fan blade deicing system, wherein the fan blade deicing system includes the temperature detection device described above. Since the fan blade deicing system adopts all the technical solutions of the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0061] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0062] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A lightning protection temperature sensor, characterized in that: The lightning protection temperature sensor (50) comprises: A metal shell (100) forms a shielding inner cavity with a wire passing opening; A detection component, comprising a thermistor (200) and two shielded signal wires (300), wherein the thermistor (200) is disposed at the bottom of the shielded inner cavity and is spaced apart from the metal shell (100), the two shielded signal wires (300) are spaced apart from each other, and the first ends of the two shielded signal wires (300) are respectively connected to two pins of the thermistor (200) in a one-to-one correspondence, and the second ends of the two shielded signal wires (300) extend out of the metal shell (100) from the wire passing opening; An insulating fixed assembly comprises an insulating partition (400), an insulating filler, a first insulating support member (500) and a second insulating support member (600), wherein the insulating partition (400) is placed between the two pins, the first insulating support member (500) and the second insulating support member (600) are respectively arranged in the line opening and the shielding inner cavity in a one-to-one correspondence, and both can allow the two shielded signal lines (300) to pass through, and the shielding inner cavity is filled with the insulating filler to wrap the detection assembly and isolate the detection assembly from the metal shell (100).

2. The lightning protection temperature sensor according to claim 1, characterized in that: The insulating fixing assembly further comprises an insulating thermally conductive sheath (800) having insulating thermal conductivity, the insulating thermally conductive sheath (800) being disposed between the thermistor (200) and the metal shell (100), and the insulating filler can wrap the insulating thermally conductive sheath (800) so that the insulating thermally conductive sheath (800) is isolated from the thermistor (200) and the metal shell (100), respectively.

3. The lightning protection temperature sensor according to claim 2, characterized in that: The insulating heat-conductive sheath (800) is placed at the bottom of the shielding inner cavity and forms a sheath space. The sheath space is open at one end close to the wire passage so that the thermistor (200) can extend into the sheath space, and the sheath space is closed at one end away from the wire passage.

4. The lightning protection temperature sensor according to claim 3, characterized in that: The insulating filler comprises an insulating thermally conductive filler and an insulating fixed filler. The insulating thermally conductive filler is filled on the outside of the jacket space and is located between the insulating thermally conductive jacket (800) and the metal shell (100) to isolate the insulating thermally conductive jacket (800) and the metal shell (100). The insulating fixed filler fills the inside of the jacket space and the shielding inner cavity located on the open side of the jacket space to respectively isolate the insulating thermally conductive jacket (800) from the thermistor (200) and the shielded signal line (300) from the metal shell (100). The thermal conductivity of the insulating thermally conductive filler is greater than the thermal conductivity of the insulating fixed filler. The insulation coefficient of the insulating fixed filler is greater than the insulation coefficient of the insulating thermally conductive filler.

5. The lightning protection temperature sensor according to claim 1, characterized in that: Both of the two pins are sleeved with insulating heat shrink tubes, and / or the thickness of the insulating partition (400) is designed as follows: Where D is the thickness of the insulating partition (400), mm; α is the margin coefficient, which is 1.5 for equipment installed in low-lightning areas and 2.0 for equipment installed in high-lightning areas; E1 is the breakdown field strength required by the insulation level, (V / mm); E2 is the electric field strength, (V / m); ∈ is the relative dielectric constant.

6. The lightning protection temperature sensor according to any one of claims 1 to 5, characterized in that: The metal shell (100) comprises a metal tube body (110), a threaded mounting body (120) and a nut member (130); the metal tube body (110) forms the shielding inner cavity; the threaded mounting body (120) is sleeved on the outer side of the metal tube body (110) near the wire passing opening; and a first external thread is formed on the threaded mounting body (120) and is threadably connected to the nut member (130) so that the nut member (130) can be fastened and installed.

7. The lightning protection temperature sensor according to claim 6, characterized in that: The lightning protection temperature sensor (50) also includes a plug assembly (900), the plug assembly (900) includes a plug body (910), a sheath layer (920) and a shielding layer (930), the metal tube body (110) is formed with a second external thread on the outer periphery between the wire passage and the threaded mounting body (120), the plug body (910) is covered on the metal tube body (110) and is threadedly connected to the second external thread, two shielded signal wires (300) are arranged through the plug body (910), and one of the shielded signal wires (300) is split into a first signal wire and a second signal wire, the signal wire extending from the plug body (910) is sequentially sleeved with the shielding layer (930) and the sheath layer (920) from the inside to the outside, and a shielding lead wire (940) is connected between the nut member (130) and the shielding layer (930).

8. The lightning protection temperature sensor according to claim 6, characterized in that: The insulating fixing assembly also includes a third insulating support member (700), and the first insulating support member (500), the second insulating support member (600) and the third insulating support member (700) are arranged in sequence from the wire passing opening along the length direction of the metal tube body (110), and the second insulating support member (600) is arranged corresponding to the threaded mounting body (120), and the first insulating support member (500), the second insulating support member (600) and the third insulating support member (700) are each formed with two threading holes for the two shielded signal lines (300) to pass through respectively, and the second insulating support member (600) and the third insulating support member (700) are also each formed with a glue injection hole for injecting the insulating filler.

9. A temperature detection device, characterized in that: The temperature detection device comprises a temperature acquisition unit (10), a photoelectric isolation device (20), a remote surge protection device (30) and a near-end surge protection device (40) which are sequentially connected through the shielded signal line (300), and a lightning protection temperature sensor according to any one of claims 1 to 8, wherein the number of the lightning protection temperature sensors (50) is at least two, at least two of the lightning protection temperature sensors (50) are arranged in parallel, and the shielded signal line (300) between the near-end surge protection device (40) and the lightning protection temperature sensor (50) does not exceed 1.5 meters, the near-end surge protection device (40) is set as a bidirectional signal surge protector, and the shielded signal line (300) between the remote surge protection device (30) and the temperature acquisition unit (10) does not exceed 1.5 meters.

10. A fan blade deicing system, characterized in that: The fan blade deicing system comprises the temperature detection device according to claim 9.

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