WO2018014675A1 - 油浸变压器光纤测温探头固定装置 - Google Patents

油浸变压器光纤测温探头固定装置 Download PDF

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WO2018014675A1
WO2018014675A1 PCT/CN2017/087980 CN2017087980W WO2018014675A1 WO 2018014675 A1 WO2018014675 A1 WO 2018014675A1 CN 2017087980 W CN2017087980 W CN 2017087980W WO 2018014675 A1 WO2018014675 A1 WO 2018014675A1
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fiber
oil
optical fiber
ptfe
immersed transformer
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PCT/CN2017/087980
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English (en)
French (fr)
Inventor
聂德鑫
程林
皮本熙
邓建钢
杜振波
刘诣
江翼
曹旭
陆云才
周志成
Original Assignee
国网电力科学研究院武汉南瑞有限责任公司
国网江苏省电力公司电力科学研究院
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Publication of WO2018014675A1 publication Critical patent/WO2018014675A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
    • G01K1/14—Supports; Fastening devices; Arrangements for mounting thermometers in particular locations
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K11/00—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00
    • G01K11/32—Measuring temperature based upon physical or chemical changes not covered by groups G01K3/00, G01K5/00, G01K7/00 or G01K9/00 using changes in transmittance, scattering or luminescence in optical fibres
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/40—Structural association with built-in electric component, e.g. fuse

Definitions

  • the invention relates to the field of optical fiber temperature measuring equipment, in particular to an oil immersed transformer optical fiber temperature measuring probe fixing device.
  • Power transformer is one of the core equipment of modern power system.
  • the internal temperature of the transformer, especially the hot spot temperature of the winding has a direct relationship with the insulation performance and aging life of the transformer.
  • the temperature of the winding hot spot is too high, and it will be related to the power system.
  • the safe operation is dangerous, and the temperature is too low, and the transformer load capacity cannot be fully utilized, thereby reducing the economic effect of the transformer. Therefore, temperature monitoring of transformer windings is of great significance for ensuring safe and reliable transformers, economic operation and long service life.
  • the sensor probe placed in the winding can be used to directly and accurately measure the hot spot temperature, providing users with direct and dynamic measurement, which is direct, real-time and accurate.
  • fiber optic temperature measurement technology has gradually been accepted by the power transformer industry.
  • the embodiment of the invention provides an oil-immersed transformer optical fiber temperature measuring probe fixing device, which is expected to solve the adverse effect of the air factor on the transformer when the optical fiber probe is fixed on the insulating block, and/or improve the long-term stability of the optical fiber temperature measurement. And the design is carried out.
  • the present invention provides an oil-immersed transformer optical fiber temperature probe fixing device, the device comprising an insulating spacer disposed between the transformer coils, wherein the insulating spacer is provided with an optical fiber temperature measuring probe assembly a strip-shaped card slot, wherein the strip-shaped card slot is provided with a limit circular hole larger than a strip-shaped slot hole diameter;
  • the fiber optic temperature probe assembly includes a transmission fiber and a fiber optic temperature sensor connected to an end of the transmission fiber, and the transmission fiber and the fiber temperature sensor are sequentially disposed in the strip card slot, wherein The transmission fiber passes through the limiting hole, and the portion of the transmission fiber corresponding to the limiting hole is provided with a limiting protrusion adapted to the limiting hole, the limiting protrusion The axial movement of the fiber optic temperature probe assembly is limited by the limiting hole.
  • the transmission fiber comprises: a quartz fiber core and a fiber protection component sleeved outside the quartz fiber core.
  • the transmission fiber includes an outer fiber segment and a fixed segment fiber
  • the outer fiber segment and the fixed segment fiber each include: a quartz fiber core and a first sleeve disposed outside the quartz fiber core a PTFE fiber protection sleeve, a second PTFE fiber protection sleeve is sleeved on the outer side of the first PTFE fiber protection sleeve of the outer fiber section, and the first PTFE fiber protection sleeve of the fixed section fiber and the second
  • a Kevlar ball is disposed at a position immediately adjacent to the edge of the PTFE fiber protection sleeve, and the Kevlar ball is disposed in the limit hole and is fitted with the limit hole.
  • a Kevlar reinforcing material is disposed between the first PTFE fiber protection sleeve and the second PTFE fiber protection sleeve of the outer fiber section.
  • the outer diameter of the first PTFE fiber protection sleeve is in the first range
  • the second PTFE The outer diameter of the fiber protection sleeve is located in the second range, wherein the value corresponding to the first range is smaller than the value corresponding to the second range.
  • the first range is [1.2- ⁇ 1, 1.2+ ⁇ 1] mm
  • the second range is [2.2- ⁇ 2, 2.2+ ⁇ 2] mm
  • the ⁇ 1 is a positive number of 0 or less than 1.2
  • the ⁇ 2 is a positive number of 0 or less than 2.2
  • the second PTFE fiber protection sleeve is provided with a plurality of oil holes at a distance.
  • the spacing between adjacent oil holes is a preset spacing.
  • the preset spacing is 3 to 5 cm.
  • the fiber optic temperature sensing probe comprises a quartz glass tube sealed at one end, and the quartz glass tube is internally provided with a temperature measuring material; the quartz optical fiber core extends into the quartz glass tube to be in contact with the temperature measuring material, And the transmission quartz fiber core is connected and sealed to the open end of the quartz glass tube.
  • the sealed end of the quartz glass tube is sealed with a quartz fiber.
  • the fixed segment fiber is connected to the fiber temperature sensing probe through a bare fiber, the length of the fixed fiber is a first length; the bare fiber is the first PTFE fiber protection sleeve and the second The PTFE fiber protection sleeve has an elongation length of a second length.
  • the first length and the second length are both equal to 5 cm.
  • the oil-immersed transformer optical fiber temperature measuring probe fixing device provided by the embodiment of the invention provides a strip-shaped card slot hole in the oil-immersed transformer insulating block, and the optical fiber temperature measuring probe assembly is all stuck in the strip-shaped card slot hole Therefore, the optical fiber temperature measuring probe assembly is limited in the slot of the card slot; the limiting circular hole can be matched with the limiting convex portion on the transmission fiber to limit the axial movement of the optical fiber temperature measuring probe assembly.
  • the entire optical fiber temperature measuring probe assembly and the insulating spacer are mechanically fixed and fixed, and the entire fixed portion does not have any glue, and does not generate any air bubbles, so that the optical fiber and the insulating spacer are firmly fixed together, thereby avoiding the problem that the optical fiber probe is axially falling off, and ensuring
  • the fiber optic probe enables long-term safety testing inside the oil-immersed transformer.
  • FIG. 1 is a schematic structural view of an oil-immersed transformer optical fiber temperature measuring probe fixing device according to an embodiment of the present invention
  • FIG. 2 is a schematic structural diagram of an optical fiber temperature measuring probe assembly according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural view of an opening of an insulating spacer according to an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a fiber optic temperature sensing probe according to an embodiment of the present invention.
  • insulating spacer In Fig. 1 to Fig. 4, 1: insulating spacer, 11: limiting circular hole, 12: strip-shaped card slot;
  • installation In the description of the embodiments of the present invention, it should be noted that the terms “installation”, “connected”, and “connected” are to be understood broadly, and may be, for example, a fixed connection or a Removable connection, or integral connection; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meaning of the above terms in the present invention can be understood in a specific case by those skilled in the art.
  • the embodiment of the oil-immersed transformer optical fiber temperature probe fixing device the device comprises an insulating spacer 1 disposed between the transformer coils;
  • the insulating spacer 1 is provided with a strip-shaped card slot 12 adapted to the optical fiber temperature probe assembly 2;
  • the strip-shaped card slot 12 is provided with a limit circular hole 11 larger than the diameter of the strip-shaped slot hole 12;
  • the diameter of the limiting circular hole 11 is larger than the first aperture of the strip-shaped slot 12;
  • the first aperture here is that the strip-shaped slot 12 includes a long side and a short side, where the first aperture is An aperture perpendicular to the long side, or an aperture parallel to the short side.
  • the fiber optic temperature probe assembly 2 includes: a transmission fiber and a fiber optic temperature sensor 24 connected to an end of the transmission fiber;
  • the transmission fiber and the fiber temperature sensing probe 24 are sequentially stuck in the strip card slot 12, wherein the transmission fiber passes through the limiting hole 11 , and the transmission fiber corresponds to the limit
  • the portion of the circular hole 11 is provided with a limiting convex portion adapted to the limiting circular hole, and the limiting convex portion cooperates with the limiting circular hole to limit the axial movement of the optical fiber temperature measuring probe assembly.
  • the transmission fiber includes: an outer fiber segment 21 and a fixed segment fiber 22 connected to each other.
  • the outer fiber segment 21 and the fixed segment fiber 22 each include: a quartz fiber core and a first PTFE fiber protection sleeve sleeved outside the quartz fiber core, and the outer PTFE fiber protection sleeve outer side of the outer fiber segment a second PTFE fiber protection sleeve is further disposed, and the first PTFE fiber protection sleeve of the fixed section fiber 22 is disposed at a position immediately adjacent to the edge of the second PTFE fiber protection sleeve with a Kevlar ball 3, The Kevlar ball 3 is disposed in the limit hole 11 and is fitted with the limit hole 11.
  • the Kevlar ball 3 is a ball body, a columnar body or the like formed of a Kevlar ball material, and is a component of the aforementioned limit protrusion.
  • the fiber optic temperature probe assembly 2 is wound by Kevlar and forms a sphere between the two layers of sleeves, which can fix the position of the fiber optic temperature probe assembly 2 and prevent the fiber from being pulled off by the axial tension.
  • the fixed segment fiber 22 is coupled to the fiber optic temperature probe 24 via a length of bare fiber 23.
  • the fixed-length fiber close to the fiber-optic temperature sensing probe 24 is wound by Kevlar, and a spherical body is formed between the two layers of the sleeve to become a limiting convex portion, and the limiting hole 11 in the middle of the insulating block is tightly matched to fix the temperature of the optical fiber.
  • the probe 24 better prevents the optical fiber temperature sensing probe 24 from being pulled off by the axial pulling force.
  • the first PTFE fiber protection sleeve and the second PTFE fiber protection sleeve have the same material and different diameters.
  • the outer diameter of the first PTFE fiber protection sleeve is in the first range;
  • the second PTFE fiber is not more than 1.2 mm.
  • the outer diameter of the protective sleeve is located in the second range, wherein the value corresponding to the first range is smaller than the value corresponding to the second range;
  • the first range is [1.2- ⁇ 1, 1.2+ ⁇ 1] mm; the second range is [2.2- ⁇ 2, 2.2+ ⁇ 2] mm; and the ⁇ 1 is a positive number of 0 or less than 1.2; The ⁇ 2 is a positive number of 0 or less than 2.2.
  • the first range can be about 1.2 mm; for example, the first range can be no more than 1.2 mm and no less than 1.0 mm.
  • the second range can be about 2.2 mm, for example, the second range can be no more than 2.2 mm, and no less than 2.0 mm.
  • the first PTFE fiber protection sleeve and the second PTFE fiber protection sleeve have permanent oil resistance, high temperature resistance and high pressure characteristics, and the fiber sleeve is high in strength and easy to process; Kevlar fiber has high strength and high wear resistance. High pressure resistance, permanent acid and alkali resistance and erosion of organic solutions; the formed limit protrusions can be stably present in the transformer oil.
  • a card insertion can be made in the outer sleeve, and the card insertion can make a tight fit between the optical fiber and the strip-shaped card slot of the insulating spacer.
  • a Kevlar reinforcing material is disposed between the first PTFE fiber protection sleeve and the second PTFE fiber protection sleeve of the outer fiber section.
  • the high-strength PTFE fiber optic protection sleeve and Kevlar reinforced material provide excellent tensile and compressive protection of the outer fiber section during installation and transformer operation.
  • a plurality of oil holes are disposed on the second PTFE fiber protection sleeve at a distance, and adjacent oil holes on the second PTFE fiber protection sleeve are spaced apart by a predetermined interval.
  • the preset pitch may range from 3 to 5 cm. In other embodiments, the preset pitch may range from 5 to 8 cm.
  • a small oil hole is disposed on the second PTFE fiber protection sleeve of the embodiment at intervals of about 3 cm. Transforming when the transformer is immersed in oil The oil can be immersed in the fiber through the oil hole, and there is no air inside the whole cable, which integrates the cable with the transformer oil, which reduces the influence of air factor at high voltage when the transformer is running.
  • the outer diameter of the first PTFE fiber protection sleeve is located in the first range, and the outer diameter of the second PTFE fiber protection sleeve is located in the second range.
  • the thickness of the fiber protection sleeve is not too thick, and the too thick sleeve is prone to breakage during the bending process of the fiber.
  • the optical fiber temperature sensing probe 24 includes a quartz glass tube 241 sealed at one end; the quartz glass tube 241 is internally provided with a temperature measuring material 243, the bare The optical fiber 23 is inserted into the quartz glass tube 241 to be in contact with the temperature measuring material 243, and the bare fiber 23 is connected and sealed to the open end of the quartz glass tube 241.
  • the sealed end of the quartz glass tube is sealed with a quartz fiber 242.
  • a quartz fiber 242 Such a structure facilitates the installation of various parts of the optical fiber temperature sensing probe, specifically: first, the quartz glass tube 241 and the bare optical fiber 23 are welded by a CO 2 laser welding machine, and the temperature measuring material 243 is placed, and then the quartz glass tube 241 is used.
  • the quartz fiber 242 is soldered; the bare fiber 23 and the quartz glass tube 241 are integrally welded by a laser welding machine, so that the quartz glass tube 241 is permanently fixed to the transmission fiber, and the fiber temperature sensing probe is a fully sealed whole.
  • the temperature measuring material 243 is completely sealed inside the bare fiber 23 and the quartz fiber 242.
  • the temperature measuring part of the probe is completely isolated from the oil, and can withstand high temperature and high pressure, so that the probe can measure temperature efficiently in the life of the transformer.
  • the temperature measuring material 243 of the present embodiment belongs to a fluorescent material, the material itself is strongly insulated and resistant to high temperature, and the fluorescent material is excited by green light, and the afterglow time of the material is proportional to the temperature, and the measured temperature is derived.
  • the temperature measuring material 243 can last for several decades, and the long life guarantees the stability of the temperature measurement.
  • the length of the fixed segment fiber 22 and the length of the bare fiber 23 are not too long.
  • the length of the fixed segment fiber 22 given in this embodiment is the first length;
  • the extension length is a second length;
  • the elongation length here is: the bare fiber 23 is a length extending from the first PTFE fiber protection sleeve and the second PTFE fiber protection sleeve.
  • the first length and the second length may or may not be equal.
  • the first length and the second length may be 5 mm.
  • the oil-immersed transformer optical fiber temperature measuring probe fixing device uses the spacer material between the coil gaps commonly used in the oil-immersed transformer, and the opening size of the insulating spacer is customized according to the shape of the optical fiber sleeve.
  • the card slot 12 and the limiting hole 11 are reserved on the insulating block, which facilitates the fixing of the fiber optic temperature probe assembly 2; solves the fixing problem between the fiber probe and the insulating block, and prevents the fiber optic temperature probe assembly 2 from being subjected to The axial pulling force is detached, and the performance of the transformer is not affected by the installation of the optical fiber, which ensures the safe and reliable operation of the transformer for a long time; the whole structure not only does not affect the signal transmission of the optical fiber temperature measuring probe, but also ensures the optical fiber temperature measuring probe assembly and the insulating spacer 1 Installed to prevent the fiber probe from falling off; the fixing between the fiber optic temperature probe component 2 and the insulating spacer 1 is mechanically fixed and does not introduce any other factors that affect the performance of the card
  • an oil-immersed transformer optical fiber temperature measuring probe fixing device which can limit the axial movement of the optical fiber temperature measuring probe assembly by matching the limiting circular hole with the limiting convex portion on the transmission fiber, thereby avoiding The problem of axial drop of the fiber optic probe has produced positive effects in the industry.
  • the oil-immersed transformer optical fiber temperature measuring probe fixing device has the characteristics of simple structure and simple production, and can be mass-produced and produced in the industry, thereby having the characteristics of strong industrial achievability.

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  • Engineering & Computer Science (AREA)
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Abstract

一种油浸变压器光纤测温探头固定装置，包括设置在变压器线圈之间的绝缘垫块（1），绝缘垫块（1）上设置有与光纤测温探头组件（2）适配的条状卡槽孔（12），条状卡槽孔（12）上设置有大于卡槽孔（12）直径的限位圆孔（11）；光纤测温探头组件（2）包括传输光纤和连接在传输光纤端部的光纤感温探头（24），传输光纤和光纤感温探头（24）依次卡设在条状卡槽孔（12）内，传输光纤对应限位圆孔（11）的部分设置有与限位圆孔（11）适配的限位凸部，限位凸部配合限位圆孔（11）限制光纤测温探头组件（2）的轴向移动。

Description

油浸变压器光纤测温探头固定装置
本申请基于申请号为201610573943.2申请日为2016年07月19日的中国专利申请提出，并要求该中国专利申请的优先权，该中国专利申请的全部内容在此引入本申请。
技术领域
本发明涉及光纤测温设备领域，特别是涉及一种油浸变压器光纤测温探头固定装置。
背景技术
电力变压器作为现代电力系统的核心设备之一，变压器的内部温度，尤其是绕组热点温度与变压器的绝缘性能及老化寿命有直接的关系；同时，绕组热点温度过高，会对并与电力系统的安全运行造成危险，而温度过低，变压器负载能力又无法得到充分利用，从而降低了变压器经济效应。因此，对变压器绕组进行温度监测，对保障变压器安全可靠、经济运行和延长使用寿命等具有重要的意义。
随着光纤技术的发展和智能电网的大力推进，结合光纤测温可直接通过放在绕组中的传感探头实现真实、准确测量热点温度，为用户提供直接动态的测量，具有直接、实时、准确等优点，光纤测温技术已经逐渐被电力变压器行业所接受。
但是针对大型高电压等级的油浸式变压器，由于变压器本身价格昂贵、电压等级高，加之绕组部分处于高电势处，所以光纤测温探头的固定既要不能对变压器产生影响，同时也需要具有较高的稳定性，避免重复安装的繁琐和对变压器的损害。
发明内容
本发明实施例提供一种油浸变压器光纤测温探头固定装置，期望解决光纤探头在绝缘垫块上固定时产生空气因素而对变压器产生的不利影响，和/或提高光纤测温的长期稳定性而进行的设计。
有鉴于此，本发明提供一种油浸变压器光纤测温探头固定装置，所述装置包括设置在变压器线圈之间的绝缘垫块，所述绝缘垫块上设置有与光纤测温探头组件适配的条状卡槽孔，所述条状卡槽孔上设置有大于条状卡槽孔直径的限位圆孔；
所述光纤测温探头组件包括传输光纤和连接在所述传输光纤端部的光纤感温探头，所述传输光纤和所述光纤感温探头依次卡设在所述条状卡槽孔内，其中，所述传输光纤穿过所述限位圆孔，所述传输光纤对应所述限位圆孔的部分设置有与所述限位圆孔适配的限位凸部，所述限位凸部配合所述限位圆孔限制所述光纤测温探头组件的轴向移动。
可选地，所述传输光纤包括：石英光纤芯以及套设在所述石英光纤芯外侧的光纤保护组件。
可选地，所述传输光纤包括相互连接的外光纤段和固定段光纤，所述外光纤段及所述固定段光纤均包括：石英光纤芯以及套设在所述石英光纤芯外侧的第一PTFE光纤保护套管，所述外光纤段的第一PTFE光纤保护套管外侧还套设有第二PTFE光纤保护套管，所述固定段光纤的第一PTFE光纤保护套管与所述第二PTFE光纤保护套管边缘紧邻的位置设置有凯夫拉丝球，所述凯夫拉丝球设置在所述限位圆孔内并与所述限位圆孔适配。
可选地，所述外光纤段的第一PTFE光纤保护套管和第二PTFE光纤保护套管之间设置有凯夫拉丝加强材料。
可选地，第一PTFE光纤保护套管的外径位于第一范围内，所述第二PTFE 光纤保护套管的外径位于第二范围内，其中，其中，所述第一范围对应的取值小于所述第二范围对应的取值。
可选地其中，所述第一范围为[1.2-Δ1，1.2+Δ1]mm；所述第二范围为[2.2-Δ2，2.2+Δ2]mm；所述Δ1为0或小于1.2的正数；所述Δ2为0或小于2.2的正数，
可选地，所述第二PTFE光纤保护套管上间距设置有若干油孔。
可选地，相邻所述油孔间的间距为预设间距。
可选地，所述预设间距为3至5cm。
可选地，所述光纤感温探头包括一端密封的石英玻璃管，所述石英玻璃管内部设置有测温材料；所述石英光纤芯伸入所述石英玻璃管内与所述测温材料接触，且所述传输石英光纤芯与所述石英玻璃管的开口端连接密封。
可选地，所述石英玻璃管的密封端采用石英光纤密封。
可选地，所述固定段光纤通过裸光纤与所述光纤感温探头连接，所述固定光纤的长度为第一长度；所述裸光纤所述第一PTFE光纤保护套管及所述第二PTFE光纤保护套管的伸长长度为第二长度。
可选地，所述第一长度和所述第二长度均等于5cm。
本发明实施例提供的油浸变压器光纤测温探头固定装置，通过在油浸式变压器绝缘垫块上开设条状卡槽孔，并将光纤测温探头组件全部卡设在条状卡槽孔内，从而将光纤测温探头组件限制在卡槽孔内；可通过限位圆孔与传输光纤上的限位凸部配合，限制光纤测温探头组件的轴向移动。如此整个光纤测温探头组件与绝缘垫块机械配合固定，整个固定部分无任何胶水，不产生任何气泡，从而使光纤与绝缘垫块牢固的固定在一起，避免光纤探头轴向脱落的问题，保证了光纤探头能够在油浸式变压器内部进行长时间的安全检测。
附图说明
图1本发明实施例提供的一种油浸变压器光纤测温探头固定装置的结构示意图；
图2为本发明实施例提供的一种光纤测温探头组件的结构示意图；
图3为本发明实施例提供的一种绝缘垫块开孔的结构示意图；
图4是本发明实施例提供的一种光纤感温探头的结构示意图。
图1至图4中，1：绝缘垫块，11：限位圆孔，12：条状卡槽孔；
2：光纤测温探头组件，21：外光纤段，22：固定段光纤；23：裸光纤，24：光纤感温探头，241：石英玻璃管，242：石英光纤，243：测温材料，3：凯夫拉丝球。
具体实施方式
下面结合附图和实施例，对本发明的具体实施方式作进一步详细描述。应当理解，以下所说明的优选实施例仅用于说明和解释本发明，并不用于限定本发明。
在本发明实施例的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本发明中的具体含义。
本实施例油浸变压器光纤测温探头固定装置，所述装置包括设置在变压器线圈之间的绝缘垫块1；
所述绝缘垫块1上设置有与光纤测温探头组件2适配的条状卡槽孔12；
所述条状卡槽孔12上设置有大于条状卡槽孔12直径的限位圆孔11； 这里的限位圆孔11的直径大于所述条状卡槽孔12的第一孔径；这里的第一孔径为所述条状卡槽孔12包括长边和短边，这里的第一孔径为垂直于所述长边的孔径，或平行于所述短边的孔径。
所述光纤测温探头组件2包括：传输光纤和连接在所述传输光纤端部的光纤感温探头24；
所述传输光纤和所述光纤感温探头24依次卡在所述条状卡槽孔12内，其中，所述传输光纤穿过所述限位圆孔11，所述传输光纤对应所述限位圆孔11的部分设置有与所述限位圆孔适配的限位凸部，所述限位凸部配合所述限位圆孔限制所述光纤测温探头组件的轴向移动。
如图1及图2所示，作为本发明的一种实施例，所述传输光纤包括：相互连接的外光纤段21和固定段光纤22。所述外光纤段21及固定段光纤22均包括：石英光纤芯以及套设在所述石英光纤芯外侧的第一PTFE光纤保护套管，所述外光纤段的第一PTFE光纤保护套管外侧还套设有第二PTFE光纤保护套管，所述固定段光纤22的第一PTFE光纤保护套管与所述第二PTFE光纤保护套管边缘紧邻的位置设置有凯夫拉丝球3，所述凯夫拉丝球3设置在所述限位圆孔11内并与所述限位圆孔11适配。
在本实施例中所述凯夫拉丝球3为由凯夫拉丝球材料形成的球体、柱状体等结构，是前述的限位凸部的组成部分。
光纤测温探头组件2通过凯夫拉丝缠绕，在两层套管之间形成球体，可固定光纤测温探头组件2的位置，防止光纤受到轴向拉力而脱落。
作为一种优选实现方式，固定段光纤22通过一段裸光纤23与光纤感温探头24连接。这样靠近光纤感温探头24的固定段光纤通过凯夫拉丝缠绕，在两层套管之间形成球体成为限位凸部，与绝缘垫块中间的限位圆孔11紧密配合可固定光纤感温探头24，更好地防止光纤感温探头24受到轴向拉力而脱落。
第一PTFE光纤保护套管和第二PTFE光纤保护套管材料相同，直径不同，一般优选第一PTFE光纤保护套管的外径位于第一范围内；不大于1.2mm，所述第二PTFE光纤保护套管的外径位于第二范围内，其中第一范围对应的取值小于所述第二范围对应的取值；
可选地，所述第一范围为[1.2-Δ1，1.2+Δ1]mm；所述第二范围为[2.2-Δ2，2.2+Δ2]mm；所述Δ1为0或小于1.2的正数；所述Δ2为0或小于2.2的正数。
在一些实施例中，所述第一范围可为1.2mm左右；例如，所述第一范围可为不大于1.2mm，且不小于1.0mm。
在一些实施例中，所述第二范围可2.2mm左右，例如，所述第二范围可为不大于2.2mm，且不小2.0mmm。
第一PTFE光纤保护套管和第二PTFE光纤保护套管本身具有永久的耐油，耐高温、高压的特性，且光纤套管强度高、容易加工；凯夫拉丝纤维具有高强度、高耐磨、高耐压性、永久的耐酸碱和有机溶液的侵蚀；形成的限位凸部可以在变压器油内稳定存在。同时可以在外层套管制作卡插，卡插可以使光纤与绝缘垫块的条状卡槽孔之间紧密配合。
作为一种可选实施例，所述外光纤段的第一PTFE光纤保护套管和第二PTFE光纤保护套管之间设置有凯夫拉丝加强材料。高强度的PTFE光纤保护套管和凯夫拉丝加强材料，使外光纤段在安装和变压器运行震动中能受到很好的抗拉和抗压保护。
作为一种可选实施例，在第二PTFE光纤保护套管上间距设置有若干油孔，第二PTFE光纤保护套管上的相邻油孔间距为预设间距。在一些实施例中，所述预设间距的取值范围可为3至5cm。在另一些实施例中所述预设间距的取值范围可为5至8cm。作为一种可选方式，本实施例第二PTFE光纤保护套管上每间隔3cm左右设置一个细小的油孔。在变压器浸油时，变压 器油能通过油孔浸入到光纤内部，整根光缆内部无空气，使光缆与变压器油融为一体，降低了变压器运行时，高电压下因空气因素带来的影响
作为一种优选方案，第一PTFE光纤保护套管的外径位于所述第一范围内，所述第二PTFE光纤保护套管的外径位于所述第二范围内。光纤保护套管的厚度不易过厚，太厚的套管在光纤弯折过程中容易出现折损。
作为一种可选实施例，如图3及图4所示，所述光纤感温探头24包括一端密封的石英玻璃管241；所述石英玻璃管241内部设置有测温材料243，所述裸光纤23伸入所述石英玻璃管241内与所述测温材料243接触，且所述裸光纤23与石英玻璃管241的开口端连接密封。
作为一种实现方式，所述石英玻璃管的密封端采用石英光纤242密封。这样的结构，方便光纤感温探头各部分的安装，具体而讲：首先使用CO2激光熔接机焊接石英玻璃管241和裸光纤23，放入测温材料243后，再将石英玻璃管241用石英光纤242进行焊接；裸光纤23与石英玻璃管241直接通过激光熔接机进行一体焊接，使石英玻璃管241永久的与传输光纤进行固定，光纤感温探头将是一个全密封性的整体，这样测温材料243全密封在裸光纤23与石英光纤242保护的内部，探头的测温部分与油完全隔离，并能耐受高温、高压，可使探头在变压器寿命范围内高效测温。
本实施例的测温材料243属于荧光物质材料，材料本身强绝缘、耐高温，荧光材料受绿光激发，材料余辉时间与温度成比例关系，推算出测量温度。测温材料243寿命可高达几十年，长寿命保证测温的稳定性。
为了保证光纤感温探头24的稳定固定，所述固定段光纤22的长度和裸光纤23的长度不易过长，本实施例给出的固定段光纤22的长度为第一长度；裸光纤23的伸出长度为第二长度；这里的伸长长度为：所述裸光纤23为伸出所述第一PTFE光纤保护套管及所述第二PTFE光纤保护套管的长度。
在一些实施例中，所述第一长度和第二长度可以相等，也可以不相等。例如，所述第一长度和第二长度相等时，所述第一长度和第二长度可为5mm。
本实施例油浸变压器光纤测温探头固定装置，绝缘垫块1选用油浸式变压器常用的线圈缝隙之间的垫块材料，绝缘垫块的开孔尺寸根据光纤套管的外形进行定制条状卡槽孔12，绝缘垫块上预留限位圆孔11，方便了光纤测温探头组件2的固定；解决了光纤探头与绝缘垫块之间的固定问题，防止光纤测温探头组件2受到轴向拉力而脱落，同时保证变压器性能不受光纤安装的影响，保障变压器长时间安全可靠运行；整个结构不仅未影响光纤测温探头的信号传输，而且保证光纤测温探头组件与绝缘垫块1之间安装，防止光纤探头脱落；光纤测温探头组件2与绝缘垫块1之间的固定，是机械式配合固定，未引入其它任何对变压器性能造成影响的因素，保证光纤正常准确的测量到绕组温度，提高油浸式变压器的安全性。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，凡按照本发明原理所作的修改，都应当理解为落入本发明的保护范围。
工业实用性
本发明实施例中提供了一种油浸变压器光纤测温探头固定装置，将通过限位圆孔与传输光纤上的限位凸部配合，可以限制光纤测温探头组件的轴向移动，从而避免光纤探头轴向脱落的问题，从而在工业上产生了积极的有益效果。且所述油浸变压器光纤测温探头固定装置，具有结构简单及制作简便的特点，可以在工业上进行大规模复制生产，从而具有工业可实现性强的特点。

Claims (13)

  1. 一种油浸变压器光纤测温探头固定装置，所述装置包括：设置在变压器线圈之间的绝缘垫块；
    所述绝缘垫块上设置有与光纤测温探头组件适配的条状卡槽孔；所述条状卡槽孔上设置有大于条状卡槽孔直径的限位圆孔；
    所述光纤测温探头组件包括：传输光纤和连接在所述传输光纤端部的光纤感温探头；所述传输光纤和所述光纤感温探头依次卡设在所述条状卡槽孔内；
    所述传输光纤穿过所述限位圆孔，所述传输光纤对应所述限位圆孔的部分设置有与所述限位圆孔适配的限位凸部；
    所述限位凸部配合所述限位圆孔限制所述光纤测温探头组件的轴向移动。
  2. 如权利要求1所述的油浸变压器光纤测温探头固定装置，其中，所述传输光纤包括：石英光纤芯以及套设在所述石英光纤芯外侧的光纤保护组件。
  3. 如权利要求2所述的油浸变压器光纤测温探头固定装置，其中，所述传输光纤包括：相互连接的外光纤段和固定段光纤；
    所述外光纤段及所述固定段光纤均包括：石英光纤芯以及套设在所述石英光纤芯外侧的第一PTFE光纤保护套管；
    所述外光纤段的第一PTFE光纤保护套管外侧还套设有第二PTFE光纤保护套管；
    所述固定段光纤的第一PTFE光纤保护套管与所述第二PTFE光纤保护套管边缘紧邻的位置设置有凯夫拉丝球，所述凯夫拉丝球设置在所述限位圆孔内并与所述限位圆孔适配。
  4. 如权利要求3所述的油浸变压器光纤测温探头固定装置，其中，所 述外光纤段的第一PTFE光纤保护套管和第二PTFE光纤保护套管之间设置有凯夫拉丝加强材料。
  5. 如权利要求3所述的油浸变压器光纤测温探头固定装置，其中，第一PTFE光纤保护套管的外径位于第一范围内；
    所述第二PTFE光纤保护套管的外径位于第二范围内；其中，所述第一范围对应的取值小于所述第二范围对应的取值。
  6. 如权利要求5所述的油浸变压器光纤测温探头固定置，其中，所述第一范围为[1.2-Δ1，1.2+Δ1]mm；所述第二范围为[2.2-Δ2，2.2+Δ2]mm；所述Δ1为0或小于1.2的正数；所述Δ2为0或小于2.2的正数。
  7. 如权利要求3所述的油浸变压器光纤测温探头固定装置，其中，所述第二PTFE光纤保护套管上间距设置有若干油孔。
  8. 如权利要求7所述的油浸变压器光纤测温探头固定装置，其中，相邻所述油孔间的间距为预设间距；
  9. 如权利要求8所述的油浸变压器光纤测温探头固定装置，其中，所述预设间距为3至5cm。
  10. 如权利要求1所述的油浸变压器光纤测温探头固定装置，其中，所述光纤感温探头包括一端密封的石英玻璃管；所述石英玻璃管内部设置有测温材料，所述石英光纤芯伸入所述石英玻璃管内与所述测温材料接触，且所述传输石英光纤芯与所述石英玻璃管的开口端连接密封。
  11. 如权利要求10所述的油浸变压器光纤测温探头固定装置，其中，所述石英玻璃管的密封端采用石英光纤密封。
  12. 如权利要求3所述的油浸变压器光纤测温探头固定装置，其中，所述固定段光纤通过裸光纤与所述光纤感温探头连接，所述固定光纤的长度为第一长度；所述裸光纤伸出所述第一PTFE光纤保护套管及所述第二PTFE光纤保护套管的伸长长度为第二长度。
  13. 如权利要求12所述的油浸变压器光纤测温探头固定装置，其中，所述第一长度和所述第二长度均等于5cm。
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