CN87201212U - 氧量传感器 - Google Patents

氧量传感器 Download PDF

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Publication number
CN87201212U
CN87201212U CN 87201212 CN87201212U CN87201212U CN 87201212 U CN87201212 U CN 87201212U CN 87201212 CN87201212 CN 87201212 CN 87201212 U CN87201212 U CN 87201212U CN 87201212 U CN87201212 U CN 87201212U
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electrode
housing
electrode support
negative electrode
film
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CN 87201212
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华天红
庄永定
陆绪民
金起工
陆树中
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Shanghai Polytechnic University
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Shanghai Polytechnic University
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Priority to CN 87201212 priority Critical patent/CN87201212U/zh
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Abstract

一种氧量传感器,用于检测气体中的氧浓度。本传感器阴、阳电极是粘固在由高分子材料制成的电极支座上,阳电极是采用块状和丝状两部分组成。因此,它具有加工性能好、精度高、成品率高、互换性好和贵金属材料耗量少、成本低等优点。

Description

一种氧量传感器,用于检测气体中的氧浓度。
现有的极谱式氧量传感器,由阴电极、阳电极、支持电解质溶液、薄膜、壳体等构成。电极浸在装有支持电解质溶液的壳体内,其端面与薄膜紧贴,端面与薄膜之间仅有一薄层支持电解质溶液。阴极由铂或金制成,阳极由银/氯化银制成,阴、阳极之间用玻璃隔开。在测量时,被测气体中的氧扩散渗透过薄膜至电极,在阴极上还原生成氢氧根离子,即有扩散电流产生,该电流的大小与被测气体中的氧浓度成正比。因此,通过对该电流的放大等,便可在仪表中显示出被测气体中的氧含量。上述传感器的不足之处在于:阴、阳极是用玻璃隔开的,加工难度大,特别在烧结和研磨过程中易产生裂纹甚至破碎,严重影响了传感器的精度和成品率。阳电极是采用棒状的银材制成,贵金属耗量大,成本高。
本实用新型旨在提供一种改进型的极谱式氧量传感器,它不仅提高了传感器的精度和成品率,且贵金属耗量大为减少,成本低。
本实用新型是这样实现的:它由壳体、薄膜、支持电解质溶液、阴电极、阳电极和电极支座构成。薄膜固定在壳体前端,壳体内充填定量的支持电解质溶液,阴、阳极与电极支座由粘结剂粘结成一体,固定在壳体内,阴极置于电极支座中央,呈点状裸露于电极支座一端面上,阳极置于电极支座表面,其前部为块状,后部为丝状,阴、阳极之间有电极支座隔开。阴极由铂或金制成,阳极由银/氯化银制成。在测量时,被测气体中的氧扩散渗透过薄膜至阴极表面还原,即有扩散电流产生,经放大等后由仪表显示出被测气体中的氧含量。
上述的电极支座和壳体由聚四氟乙烯、聚矾、尼龙等高分子材料制成。
上述的壳体由锁紧圈、压圈、密封圈和外套组成。压圈、密封圈和薄膜均置于外套的顶端,由锁紧圈一并固定在外套上。
本实用新型由于阴、阳极是粘固在由高分子材料制成的电极支座上,因此,它具有加工性能好,容易保证传感器的精度和成品率之优点,而且能有效地控制阴、阳极间的间距,提高传感器的互换性,又由于阳极采用块状和丝状两部分制成,既保证了阳极表面积远大于阴极,又使贵金属材料耗量大为减少,降低了成本。
本实用新型的实施例及附图由以下给出:
附图是根据本实用新型提出的氧量传感器的剖面图。
下面结合附图作进一步说明:
阴极〔1〕、阳极〔2〕、〔4〕和电极支座〔6〕由粘结剂〔10〕粘固成一体。阴极〔1〕固定在电极支座〔6〕前端的中心小孔内,阳极〔2〕、〔4〕由前部块状〔2〕和后部丝状〔4〕组成。块状〔2〕固定在电极支座〔6〕前端,与阴极〔1〕同心,丝状〔4〕绕在电极支座〔6〕的表面。壳体由外套〔7〕、压圈〔9〕、密封圈〔3〕和锁紧圈〔8〕组成。压圈〔9〕、密封圈〔3〕和薄膜〔11〕、〔12〕置于外套〔7〕的一端面上,由锁紧圈〔8〕将其一并锁紧于外套〔7〕上。电极支座〔6〕固定在外套〔7〕内。电极支座〔6〕与外套〔7〕之间的空间充有定量的支持电解质溶液〔5〕。

Claims (3)

1、一种氧量传感器,用于检测气体中的氧浓度,该传感器包括壳体[8]、薄膜[11]、[12]、支持电解质溶液[5]、阴电极[1]、阳电极[2]、[4],薄膜[11]、[12]固定在壳体的前端,壳体内充有定量的支持电解质溶液[5],其特征在于:它还包括电极支座[6]、阴电极[1]、阳电极[2]、[4]与电极支座[6]由粘结剂[10]粘固成一体,固定在壳体内,阴电极[1]置于电极支座[6]中央,裸露处呈点状,位于电极支座[6]的一端面上,阳电极[2]、[4]置于电极支座[C]表面,其前部为块状[2],后部为丝状[4],阴电极[1]和阳电极[2]、[4]之间由电极支座[6]隔开。
2、据权利要求1所述的氧量传感器,其特征在于:电极支座〔6〕和壳体由聚四氟乙烯、聚矾、尼龙高分子材料制成。
3、据权利要求1或2所述的氧量传感器,其特征在于:壳体由锁紧圈〔8〕、压圈〔9〕、密封圈〔3〕和外套〔7〕组成,压圈〔9〕、密封圈〔3〕和薄膜〔11〕、〔12〕均置于外套〔7〕的顶端,由锁紧圈〔8〕一并锁紧在外套〔7〕上。
CN 87201212 1987-04-06 1987-04-06 氧量传感器 Withdrawn CN87201212U (zh)

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CN 87201212 CN87201212U (zh) 1987-04-06 1987-04-06 氧量传感器

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CN 87201212 CN87201212U (zh) 1987-04-06 1987-04-06 氧量传感器

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CN87201212U true CN87201212U (zh) 1988-03-09

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1117275C (zh) * 1997-03-21 2003-08-06 Usf过滤分离集团公司 传感器连接机构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1117275C (zh) * 1997-03-21 2003-08-06 Usf过滤分离集团公司 传感器连接机构

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