WO2017096656A1 - 一种用于在线监测变压器的水分、氢含量及温度的变送器 - Google Patents

一种用于在线监测变压器的水分、氢含量及温度的变送器 Download PDF

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Publication number
WO2017096656A1
WO2017096656A1 PCT/CN2015/099398 CN2015099398W WO2017096656A1 WO 2017096656 A1 WO2017096656 A1 WO 2017096656A1 CN 2015099398 W CN2015099398 W CN 2015099398W WO 2017096656 A1 WO2017096656 A1 WO 2017096656A1
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WIPO (PCT)
Prior art keywords
flexible circuit
temperature
moisture
transmitter
circuit board
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PCT/CN2015/099398
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English (en)
French (fr)
Inventor
陈梦
钟形磊
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海卓赛思（苏州）传感技术有限公司
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Publication of WO2017096656A1 publication Critical patent/WO2017096656A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass

Definitions

  • the invention relates generally to the field of online monitoring, and more particularly to a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer.
  • Power transformers are important equipment in the power grid. Aging, high load levels, and network failures can cause damage to the transformer. This increases the risk of accidental failures and power outages.
  • the hydrogen content and its rate of change reflect the severity of the fault condition, and moisture can have a direct impact on the life of the transformer. And the moisture in the oil has an important influence on the cellulose condition of the transformer and the insulation capacity of the oil. Continuous monitoring of hydrogen content and water content using a probe mounted in an in-situ position such as a fuel intake is the first step in preventive maintenance measures to extend the life of the transformer and ultimately reduce the total cost of the owner.
  • sensing instruments for online monitoring of transformer status use pumping pumps, hoses, batteries, valves, membranes or other wearable parts that may malfunction or cause power interruption, shortening the service life of the product; Inevitably introducing a small amount of external ambient air, the accumulation will bring hidden dangers to the safe operation of the transformer; at the same time, the sensor has a problem of poor measurement accuracy.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer, and realizes three key parameter measurement, and the adjustable probe installation depth can be It is suitable for various transformer valve bodies and can be in direct contact with representative oil.
  • the present invention adopts the following technical solutions:
  • a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer including an electrical box, a long detection tube, a mounting adapter, a jacket fastening nut, an upper thermal insulation card, a lower thermal insulation card, and an insulated sealing step Table, end cap, flexible circuit tape and flexible circuit board ( twenty four
  • the long detecting tube extends into the interior of the electrical box and is tightly connected and sealed by the flange nut, and the mounting adapter and the outer casing fastening nut are sleeved on the long detecting tube, and the long detecting
  • An assembly for suspending and fastening the flexible circuit board is disposed inside the detecting end, and the assembly comprises a heat insulating cylinder assembled by the upper heat insulating card, the lower heat insulating card and the heat insulating sealing step, and the end cap and the length are
  • the detecting tube thread is screwed; one end of the flexible circuit guiding strip is electrically connected to the flexible circuit board, and the other end of the flexible circuit guiding strip passes through
  • a non-metallic ferrule disposed on the long detecting tube is disposed between the mounting adapter and the outer casing fastening nut, and the outer casing fastening nut is screwed with the mounting adapter and drives the non-metal card not shown
  • the sleeve is tightly attached to the mounting adapter.
  • the mounting adapter is sleeved on the long detecting tube, and the two form a soft contact seal by an O-ring provided in the groove of the mounting adapter.
  • the ball valve connection end of the mounting adapter is provided with an inner hole, and the mounting adapter is provided with A vent screw hole communicating with the inner hole and a vent screw.
  • a gasket is disposed between the vent screw and the mounting adapter.
  • the long detecting tube is filled with an insulating cotton.
  • the heat insulating sealing step is circularly inserted into the circular hole, and the sub-head screw is screwed into the upper heat-insulating card member and the lower heat-insulating card member which are combined into the heat-insulating cylinder, and the flexible circuit board is suspended and clamped.
  • the heat-insulating sealing step is provided with a step and a groove, respectively, and a sealing ring is sleeved.
  • the flexible circuit board is electrically connected to the flexible circuit guide tape and is integrally formed by a crimping process.
  • the inner wall of the insulated sealing step through which the flexible circuit tape is passed is filled with epoxy resin.
  • the invention relates to a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer.
  • the long detecting tube is provided with a component for hanging and fixing a flexible circuit board inside the detecting end, and the component is insulated by a thermal insulation card.
  • the card and the insulated sealing step are assembled into an insulated cylinder.
  • the surface of the flexible circuit board is soldered with a hydrogen sensitive core and a temperature and humidity sensor.
  • One end of the flexible circuit guiding strip is electrically connected to the flexible circuit board, and the other end of the flexible circuit guiding tape passes through the long detecting tube and extends into the electrical box and is connected with the circuit board inside the electrical box.
  • the upper heat-insulating card member, the lower heat-insulating card member and the heat-insulating sealing step are all processed by using a polyphenylene sulfide material having a high adiabatic coefficient, and the three are combined into a body, and the thin flexible circuit board is sandwiched by the thin flexible circuit.
  • the large area and small volume of the plate has high heat exchange efficiency with the surrounding oil fluid, and has little influence on the temperature control of the hydrogen sensitive chip, thereby improving the measurement accuracy of the sensor.
  • the adjustable probe installation depth can adapt to various transformer valve bodies.
  • the special requirements temperature and humidity sensor can extend out of the oil hole area, and the hydrogen sensitive core body is located in the oil hole area. This design can quickly and reliably detect the fluctuation of water content while avoiding interference. Hydrogen sensor temperature control.
  • FIG. 1 is a schematic view showing the structure of a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer.
  • Figure 2 is a schematic enlarged view of the probe end of Figure 1.
  • Figure 3 is an exploded view of the sensor core insulation design structure of Figure 1.
  • Figures 1 through 3 illustrate a specific embodiment of a transmitter for online monitoring of moisture, hydrogen content and temperature of a transformer, the transmitter including an electrical box 1.
  • Long detection tube 3 installation adapter 11 , outer casing fastening nut 9 , upper insulation clamp 19 , lower insulation clamp 20 , insulated sealing step 21 , end cover 15 , flexible circuit guide belt 16 .
  • Long probe tube 3 extends to the electrical box 1 Internally through the flange nut 2 Screwed tightly and sealed, fitted adapter 11 and jacket fastening nut 9
  • the sleeve is disposed on the long detecting tube 3, and the long detecting tube 3 is provided with a component for hanging and fastening the flexible circuit board 24 inside the detecting end.
  • the assembly comprises an upper heat insulating card member 19, a lower heat insulating card member 20 and a heat insulating sealing step. Assembled into a thermally insulated cylinder, the end cap 15 and the long detection tube 3 are screwed tightly.
  • One end of the flexible circuit tape 16 is electrically connected to the flexible circuit board 24, and the other end of the flexible circuit leads 16 through the long detecting tube 3 , extend into the electrical box 1 and connect to the circuit board inside the electrical box.
  • the flexible circuit board 24 is surface-welded with a hydrogen sensitive core 25 and a temperature and humidity sensor 26 .
  • the upper heat insulating card member 19, the lower heat insulating card member 20 and the heat insulating sealing step 21 They are all made of polyphenylene sulfide material with high adiabatic coefficient. The three are combined into a body, and the thin flexible circuit board is clamped inside. The heat exchange efficiency between the small flexible circuit board and the small volume and the surrounding oil fluid is small. High, hydrogen sensitive chip 25 The influence of temperature control is small, which improves the measurement accuracy of the sensor.
  • Adjustable probe mounting depth can adapt to a variety of transformer valve body, special requirements temperature and humidity sensor 26 can extend out of the oil hole area, hydrogen sensitive core 25 Located in the oil hole area, this design quickly and reliably detects fluctuations in water content while avoiding interference with hydrogen sensor temperature control.
  • a V-shaped non-metallic ferrule set over the long detecting tube 3 is disposed between the mounting adapter 11 and the outer casing fastening nut 9. 10, outer casing fastening nut 9 and mounting adapter 11 threaded connection and drive V-shaped non-metallic ferrule 10 top mounting adapter 9 .
  • the V-shaped non-metallic ferrule 10 Made of PTFE material, its function 1: to seal the installation adapter 11 and the long detection tube 3; function 2: to avoid the installation of the adapter 9 and the detection tube 3
  • the direct contact between the metal ensures that the repeated disassembly and assembly has no damage to the outer wall of the long detecting tube 3; and the third function: the function of fastening the detecting tube 3 after being installed in place.
  • the mounting adapter 11 is sleeved on the long detecting tube 3, and the two are disposed in the groove of the mounting fitting 11
  • the sealing ring 14 forms a soft contact seal.
  • the sealing ring 14 forms a further seal between the mounting adapter 11 and the detecting tube 3, which greatly improves the sealing effect; especially in the installation of the fitting 11 Loosen and adjust the adjustable probe to the length of the liquid to prevent a large amount of overflow, and also prevent air from entering the oil chamber and play an absolute sealing role.
  • the ball valve connection end of the mounting adapter 11 is provided with an inner oil guiding hole 11a, and the mounting adapter 11 is provided with The inner oil guide hole 11a communicates with the vent screw hole 11b and the vent screw 12 is attached.
  • the inner oil hole 11a The aperture is larger than the diameter of the ball valve spool.
  • a gasket 13 is disposed between the vent screw 12 and the mounting adapter 11.
  • the gasket 13 It can seal well between the vent screw 12 and the mounting adapter 11 to prevent external gas from entering and ensure the safe operation of the transformer.
  • the detecting tube 3 is filled with a heat insulating cotton 8 .
  • the insulated cotton 8 further reduces the ambient temperature change to the hydrogen sensitive core 25 The influence of temperature control further improves the measurement accuracy of the sensor.
  • the sub-head screws 23 and the upper heat-insulating clips combined into the heat-insulating cylinders are respectively screwed into the circular holes symmetrically opened by the adiabatic sealing steps 21 19, the lower insulation card 20 is tight, the flexible circuit board 24 is suspended and clamped.
  • Two sub-head screws 23 Screw into the hole of the insulated sealing step 21, respectively, and tighten the upper thermal insulation member 19 and the lower thermal insulation member 20
  • the three members become a cylinder under the action of the sub-head screw force, and the flexible circuit board 24 is suspended and fixed, and the sensor core insulating package unit is conveniently installed in the detecting tube 3.
  • the adiabatic sealing step 21 is provided with a step and a groove, respectively, and an O-ring 2 17 and an O-ring 3 18 are respectively sleeved. .
  • the end cap 15 and the detecting tube 3 are screwed against the insulating cylinder so that the O-ring seals 17 are axially sealed, and the O-rings 38 are embedded in the detecting tube together with the sensor core insulating package unit.
  • the utility model has the function of radial sealing, and the double sealing ring improves the sealing property, and absolutely prevents the gap from infiltrating into the electrical box through the inner hole of the detecting tube 3 .
  • the flexible circuit board 24 and the flexible circuit tape 16 Electrically connected and preferably made in one piece by a crimping process.
  • the copper mold wire in the flexible circuit tape 16 is placed on a 0.6 mm flexible circuit board by a pressing process. Internally, an electrical connection is achieved.
  • the long copper conductor wire and high thermal resistance of the flexible circuit can provide a considerable thermal resistance, which facilitates the temperature control of the hydrogen sensor and further improves the measurement accuracy of the sensor.
  • the insulating circuit of the flexible circuit tape 16 is filled with an epoxy resin 22 in the inner hole of the insulating sealing step. Potting epoxy resin 22
  • the main function is to seal the thermal insulation card 19, the lower thermal insulation member 20 and the adiabatic sealing step 21, and assemble the insulation cylinder to lead the gap of the flexible circuit conduction belt 16 to prevent the gap from penetrating the liquid through the detection tube.
  • the inner hole enters the electrical box 1 to further improve the sealing performance of the entire sensor.
  • the end of the detecting tube 3 is provided with an end cap for fixing the detecting tube 3
  • the inner sensor core is insulated from the package unit and has a plurality of holes 15a, which are mainly used for the probe end temperature and humidity sensor. 26 It is completely in direct contact with the oil, and can quickly and reliably detect the fluctuation of the water content.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

一种用于在线监测变压器的水分、氢含量及温度的变送器，包括电气盒（1）、长探测管（3）、安装适配接头（11）、外套紧固螺母（9）、上绝热卡件（19）、下绝热卡件（20）、绝热密封阶台（21）、端盖（15）、柔性电路导带（16）等。长探测管（3）伸至电气盒（1）内部通过法兰盘螺母（2）旋紧连接并密封，安装适配接头（11）和外套紧固螺母（9）套设于长探测管（3）上，长探测管（3）于探测端内部设有悬空固紧柔性电路板（24）的组件，该组件由所述上绝热卡件（19）、下绝热卡件（20）和绝热密封阶台（21）组装成绝热圆柱体，端盖（15）与长探测管（3）螺纹旋紧。柔性电路导带（16）一端与柔性电路板（24）电连接，柔性电路导带（16）另一端穿出所述长探测管（3），伸至电气盒（1）内并与电气盒（1）内电路板连接。柔性电路板（24）表面焊接氢敏芯体（25）及温湿度传感器（26）。可调式探头安装深度能够适应各种变压器阀体，并且可与具有代表性的油液直接接触，实现了三种关键性参数测量。

Description

一种用于在线监测变压器的水分、氢含量及温度的变送器 一种用于在线监测变压器的水分、氢含量及温度的变送器
技术领域
本发明主要涉及 在线监测领域 ，尤其涉及一种用于在线监测变压器的水分、氢含量及温度的变送器。
背景技术
电力变压器是电网内的重要设备。老化、高负载水平以及网络故障均会导致变压器受损 , 从而增加意外故障和电力中断风险。氢含量及其变化率可反映故障状态的严重程度，水分可对变压器寿命产生直接影响。并且油中水分对于变压器纤维素状况和油液的绝缘能力产生重要影响。利用安装在诸如取油口等原位位置的探头对氢含量和水含量进行连续监测是预防性维护措施延长变压器寿命、最终降低业主总成本的第一步。
目前，用于变压器状态在线监测的传感仪器，使用抽油泵、软管、电池、阀、薄膜或其它可能发生故障或导致电力中断的易磨损零件，缩短了产品使用寿命；且操作过程中会不可避免的引入微量外界环境空气，累积将对变压器的安全运行带来隐患；同时，传感器存在测量精度较差的问题。
发明内容
本发明要解决的技术问题是克服现有技术的不足，提供一种用于在线监测变压器的水分、氢含量及温度的变送器，实现了三种关键性参数测量，可调式探头安装深度能够适应各种变压器阀体，并且可与具有代表性的油液直接接触。
为解决上述技术问题，本发明采用以下技术方案：
一种用于在线监测变压器的水分、氢含量及温度的变送器，包括电气盒、长探测管、安装适配接头、外套紧固螺母、上绝热卡件、下绝热卡件、绝热密封阶台、端盖、柔性电路导带及柔性电路板（ 24 ）；所述长探测管伸至所述电气盒内部通过所述法兰盘螺母旋紧连接并密封，所述安装适配接头和外套紧固螺母套设于长探测管上，所述长探测管于探测端内部设有悬空固紧柔性电路板的组件，该组件包括由所述上绝热卡件、下绝热卡件和绝热密封阶台组装成的绝热圆柱体，所属端盖与所述长探测管螺纹旋紧；所述柔性电路导带一端与所述柔性电路板电连接，所述柔性电路导带另一端穿出所述长探测管，伸至所述电气盒内并与电气盒内的电路板连接。
作为上述技术方案的进一步改进：
所述安装适配接头和所述外套紧固螺母间设有套装于长探测管的非金属卡套，所述外套紧固螺母与所述安装适配接头螺纹连接并驱使非所示非金属卡套顶紧所述安装适配接头。
所述安装适配接头套设在所述长探测管上，二者由设于所述安装适配接头沟槽内的 O 型圈形成软接触密封。
所述安装适配接头 的球阀连接端开设有内孔， 所述安装适配接头上设有与所述 内孔相通的排气螺钉孔，并安设排气螺钉。
所述 排气螺钉与 安装适配接头之间套设有密封垫。
所述长探测管内填设有绝热绵。
所述绝热密封阶台圆面对称开设的圆孔内分别拧入子头螺钉与所述合并成绝热圆柱体的上绝热卡件、下绝热卡件顶紧，柔性电路板悬空卡紧。
所述绝热密封阶台开设有阶台和沟槽，分别套设密封圈。
所述柔性电路板与所述柔性电路导带电连接并通过压接工艺制作成一体。
所述柔性电路导带所穿出的绝热密封阶台内孔灌封环氧树脂。
与现有技术相比，本发明的优点在于：
本发明的一种用于在线监测变压器的水分、氢含量及温度的变送器，长探测管于探测端内部设有悬空固紧柔性电路板的组件，该组件由上绝热卡件、下绝热卡件和绝热密封阶台组装成绝热圆柱体。柔性电路板表面焊接氢敏芯体及温湿度传感器。柔性电路导带一端与柔性电路板电连接，柔性电路导带另一端穿出长探测管，伸至电气盒内并与电气盒内电路板连接。该结构中，上绝热卡件、下绝热卡件和绝热密封阶台均选用绝热系数高的聚苯硫醚材料加工而成，三者组合成体，内夹持薄型柔性电路板，由于薄型柔性电路板面积大体积小的特性与周围油液流体间的热交换效率高，对氢敏芯片温控的影响较小，提高了传感器测量精度。可调式探头安装深度能够适应各种变压器阀体，特殊要求温湿度传感器可伸出油孔区，氢敏芯体位于油孔区，此设计可快速可靠地探测水含量波动值，同时避免了干扰氢传感器温控。
附图说明
图 1 是本发明一种用于在线监测变压器的水分、氢含量及温度的变送器 结构示意图。
图 2 是图 1 的探头端处放大结构示意图。
图 3 是图 1 传感器芯体绝热封装结构设计元件分解图。
图中各标号表示：
1 、电气盒； 2 、法兰螺母； 3 、长探测管， 3a 、导油孔； 4 、电连接件； 5 、电路板； 6 、上电路板； 7 、转接板； 8 、绝热棉； 9 、外套紧固螺母； 10 、 V 型非金属卡套； 11 、安装适配接头， 11a 、导油孔， 11b 、排气孔； 12 、排气螺钉； 13 、密封垫； 14 、 O 型密封圈一； 15 、端盖， 15a 、端盖孔； 16 、柔性电路导带； 17 、 O 型密封圈二； 18 、 O 型密封圈三； 19 、上绝热卡件； 20 、下绝热卡件； 21 、绝热密封阶台； 22 、环氧树脂胶； 23 、子头螺钉； 24 、柔性电路板； 25 、氢敏芯体； 26 、温湿度传感器。
具体实施方式
以下将结合说明书附图和具体实施例对本发明做进一步详细说明。
图 1 至图 3 示出了用于在线监测变压器的水分、氢含量及温度的变送器的一种具体实施例，该变送器包括电气盒 1 、长探测管 3 、安装适配接头 11 、外套紧固螺母 9 、上绝热卡件 19 、下绝热卡件 20 、绝热密封阶台 21 、端盖 15 、柔性电路导带 16 。
长探测管 3 伸至电气盒 1 内部通过法兰螺母 2 旋紧连接并密封，安装适配接头 11 和外套紧固螺母 9 套设于长探测管 3 上，长探测管 3 于探测端内部设有悬空固紧柔性电路板 24 的组件，该组件由上绝热卡件 19 、下绝热卡件 20 和绝热密封阶台 21 组装成绝热圆柱体，端盖 15 与长探测管 3 螺纹旋紧。柔性电路导带 16 一端与柔性电路板 24 电连接，柔性电路导带 16 另一端穿出长探测管 3 ，伸至电气盒 1 内并与电气盒内电路板连接。柔性电路板 24 表面焊接氢敏芯体 25 及温湿度传感器 26 。
本具体实施例中，上绝热卡件 19 、下绝热卡件 20 和绝热密封阶台 21 均选用绝热系数高的聚苯硫醚材料加工而成，三者组合成体，内夹持薄型柔性电路板，由于薄型柔性电路板面积大而体积小的特性与周围油液流体间的热交换效率高，对氢敏芯片 25 温控的影响较小，提高了传感器测量精度。
可调式探头安装深度能够适应各种变压器阀体，特殊要求温湿度传感器 26 可伸出油孔区，氢敏芯体 25 位于油孔区，此设计可快速可靠地探测水含量波动值，同时避免了干扰氢传感器温控。
本具体实施例中，安装适配接头 11 和外套紧固螺母 9 间设有套装于长探测管 3 的 V 型非金属卡套 10 ，外套紧固螺母 9 与安装适配接头 11 螺纹连接并驱使 V 型非金属卡套 10 顶紧安装适配接头 9 。该 V 型非金属卡套 10 采用聚四氟乙烯材料制作，其作用一：起到对安装适配接头 11 和长探测管 3 之间的密封作用；作用二：可避免安装适配接头 9 与探测管 3 形成 金属间直接接触，确保了重复拆装对长 探测管 3 外壁无损伤；作用三：起到安装到位后紧固 探测管 3 的作用。
本实施例中，安装适配接头 11 套设在长探测管 3 上，二者由设于安装适配接头 11 沟槽内的 O 型密封圈一 14 形成软接触密封。该密封圈 14 可对安装适配接头 11 与探测管 3 之间形成进一步密封，大大提高了密封效果；尤其在安装适配接头 11 旋松，调整可调式探头伸入液体长度情况下，防止有大量溢出，也避免了空气进入油腔内，起到绝对密封作用。
本实施例中，安装适配接头 11 的球阀连接端开设有内导油孔 11a ， 安装适配接头 11 上设有与 内导油孔 11a 相通的排气螺钉孔 11b ，并安装排气螺钉 12 。 该内 导油 孔 11a 孔径大于球阀阀芯通径，安装传感器时，球阀内残余空气会在重力作用下，沿球阀阀芯、 内 导油 孔 11a 、逐步汇聚于最高相对位置的 排气螺钉 12 处，保证了空气的完全有效排出。
本实施例中， 排气螺钉 12 与 安装适配接头 11 之间套设有密封垫 13 。该密封垫 13 可对排气螺钉 12 与安装适配接头 11 之间进行很好的密封效果，防止外部气体进入，保证了变压器的安全运行。
本实施例中，探测管 3 内填设有绝热绵 8 。该绝热绵 8 进一步降低了外界环境温度变化对 氢敏芯体 25 控温 影响，进一步提高了传感器测量精度。
本实施例中，绝热密封阶台 21 圆面对称开设的圆孔内分别拧入子头螺钉 23 与合并成绝热圆柱体的上绝热卡件 19 、下绝热卡件 20 顶紧，柔性电路板 24 悬空卡紧。两个子头螺钉 23 旋入绝热密封阶台 21 孔内，分别顶紧上绝热卡件 19 及下绝热卡件 20 ，三者在子头螺钉力作用下成为一个圆柱体，并完成了柔性电路板 24 悬空固定作用，同时便于传感器芯体绝热封装单元一体安装于探测管 3 内。
本实施例中，绝热密封阶台 21 开设有阶台和沟槽，分别套设 O 型密封圈二 17 、 O 型密封圈三 18 。端盖 15 与探测管 3 旋紧顶住绝热圆柱体使 O 型密封圈二 17 起到轴向密封作用， O 型密封圈三 18 与传感器芯体绝热封装单元一起嵌入探测管 3 ，起到径向密封作用，双道密封圈提高了密封性，绝对性避免了间隙渗入液体通过探测管 3 内孔进入电气盒 1 。
本实施例中，柔性电路板 24 与柔性电路导带 16 电连接并优选通过压接工艺制作成一体。通过压制工艺将柔性电路导带 16 内铜模导线置于 0.6mm 柔性电路板 24 内，实现了电连接。采取柔性电路长的铜模导线和高的热阻可提供相当大的热阻，便于氢传感器温控， 进一步提高了传感器测量精度。
本实施例中，柔性电路导带 16 所穿出的绝热密封阶台内孔灌封环氧树脂 22 。灌封环氧树脂 22 主要作用是密封上绝热卡件 19 、下绝热卡件 20 和绝热密封阶台 21 组装成绝热圆柱体引出柔性电路导带 16 的间隙，避免了间隙渗入液体通过探测管 3 内孔进入电气盒 1 ，进一步提高了整个传感器的密封性能。
本实施例中，探测管 3 的端头装设有一端盖，该端盖 15 用于固定探测管 3 内传感器芯体绝热封装单元，并开有数个孔 15a ，主要用于探头端部温湿度传感器 26 完全与油直接接触，可快速可靠地探测水含量波动值。
虽然本发明已以较佳实施例揭示如上，然而并非用以限定本发明。任何熟悉本领域的技术人员，在不脱离本发明技术方案范围的情况下，都可利用上述揭示的技术内容对本发明技术方案做出许多可能的变动和修饰，或修改为等同变化的等效实施例。因此，凡是未脱离本发明技术方案的内容，依据本发明技术实质对以上实施例所做的任何简单修改、等同变化及修饰，均应落在本发明技术方案保护的范围内。

Claims (11)

  1. 一种用于在线监测变压器的水分、氢含量及温度的变送器，主要包括电气盒（1）、长探测管（3）、安装适配接头（11）、外套紧固螺母（9）、上绝热卡件（19）、下绝热卡件（20）、绝热密封阶台（21）、端盖（15）、柔性电路导带（16）及柔性电路板（24）；所述长探测管（3）伸至所述电气盒（1）内部并通过法兰盘螺母（2）旋紧连接并密封，所述安装适配接头（11）和外套紧固螺母（9）套设于长探测管（3）上，其特征在于：所述长探测管（3）于探测端内部设有悬空固紧柔性电路板（24）的组件，所述组件包括由所述上绝热卡件（19）、下绝热卡件（20）和绝热密封阶台（21）组装成的绝热圆柱体，所述端盖（15）与所述长探测管（3）螺纹旋紧，所述柔性电路导带（16）一端与柔性电路板（24）电连接，所述柔性电路导带（16）另一端穿出长探测管（3）并伸至电气盒（1）内与电气盒（1）内的电路板连接。
  2. 根据权利要求1所述的一种用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述安装适配接头（11）和所述外套紧固螺母（9）间设有套装于长探测管（3）的非金属卡套（10），所述外套紧固螺母（9）与所述安装适配接头（11）螺纹连接并驱使非所示非金属卡套（10）顶紧所述安装适配接头（11）。
  3. 根据权利要求2所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述安装适配接头（11）套设在所述长探测管（3）上，所述安装适配接头（11）与所述长探测管（3）由设于所述安装适配接头（11）沟槽内的O型圈（14）形成软接触密封。
  4. 根据权利要求2至3中任一项所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述安装适配接头（11）的球阀连接端开设有内孔（11a），所述安装适配接头（11）上设有与所述内孔（11a）相通的排气螺钉孔（11b），并安设排气螺钉（12）。
  5. 根据权利要求4所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述排气螺钉（12）与安装适配接头（11）之间套设有密封垫（13）。
  6. 根据权利要求2至3中任一项所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述长探测管（3）内填设有绝热绵（8）。
  7. 根据权利要求2所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述绝热密封阶台（21）圆面对称开设的圆孔内分别拧入子头螺钉（23）与所述上绝热卡件（19）、下绝热卡件（20）顶紧，柔性电路板（24）悬空卡紧。
  8. 根据权利要求7所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述绝热密封阶台（21）开设有阶台（21a）和沟槽（21b），分别套设密封圈（17）和密封圈（18）。
  9. 根据权利要求7所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述柔性电路板（24）表面焊接氢敏芯体（25）及温湿度传感器（26）。
  10. 根据权利要求7所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述柔性电路板（24）与所述柔性电路导带（16）电连接并通过压接工艺制作成一体。
  11. 根据权利要求7至11任意一项所述的用于在线监测变压器的水分、氢含量及温度的变送器，其特征在于：所述柔性电路导带（16）所穿出的绝热密封阶台（21）内孔灌封环氧树脂（22）。
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