公开(公告)号：US6014892A

公开(公告)日：2000-01-18

申请号：US53769

申请日：1998-04-02

申请人： Gilles Baret ,  Roland Gevaud ,  Alain Devance

发明人： Gilles Baret ,  Roland Gevaud ,  Alain Devance

IPC分类号： G01M3/20

CPC分类号： G01M3/202

摘要： A tracer gas leak detector that analyzes a test gas for presence of a tracer gas therein, including at least one gas analyzer, a secondary pump whose suction inlet is connected to the gas analyzer, a primary pump connected to the secondary pump outlet via a first pipe fitted with a first valve, and a second pipe connecting the first pipe from a point situated between the first valve and the primary pump to an inlet of the detector for connection to an enclosure via a pre-evacuated flow and said gas analyzer receiving said test gas from a part of said pre-evacuated flow, the second pipe being fitted with a second valve, the primary pump serving to pre-evacuate the enclosure, wherein a sampling member for sampling the flow travelling along the second pipe is situated directly on the wall of the second pipe in direct contact with the flow and is connected via a duct directly to the analyzer, the sampling member having flow conductance enabling the pressure in the duct to be compatible with operation of the gas analyzer while the second pipe is at a pressure greater than 10 mbar.

摘要翻译： 一种示踪气体泄漏检测器，其分析其中示踪气体的存在的测试气体，包括至少一个气体分析器，其吸入口连接到气体分析器的次级泵，经由第一泵连接到次级泵出口的主泵 配有第一阀的管，以及将第一管从位于第一阀和主泵之间的点连接到检测器的入口的第二管，用于经由预抽空流连接到外壳，并且所述气体分析器接收所述 从所述预抽空流的一部分测试气体，所述第二管装配有第二阀，所述主泵用于预抽空所述外壳，其中用于对沿着所述第二管行进的流进行取样的取样构件直接位于 第二管的壁与流体直接接触并通过管道直接连接到分析器，采样构件具有使导管中的压力能够相容的流动导通 在第二管道处于大于10毫巴的压力下，气体分析器的h运行。

公开(公告)号：US06282946B1

公开(公告)日：2001-09-04

申请号：US08568285

申请日：1995-12-06

申请人： Roland Gevaud ,  Gilles Baret

发明人： Roland Gevaud ,  Gilles Baret

IPC分类号： G01M320

CPC分类号： G01M3/202 ,  G01M3/205

摘要： A leak detector including at least one analysis unit connected to the inlet of a first secondary pump, a pre-evacuation set connected to an inlet coupling, the inlet of said pre-evacuation set further being connected to the outlet of said first secondary pump via a pipe provided with a first valve, wherein said pre-evacuation set comprises a second secondary pump and a mechanical primary pump connected together in series, and wherein a pipe provided with a second valve connects an intermediate point of said first secondary pump to the inlet of said second secondary pump.

摘要翻译： 一种泄漏检测器，包括连接到第一次级泵的入口的至少一个分析单元，连接到入口联接器的预抽空组件，所述预抽真空组件的入口还通过所述第一辅助泵的出口连接到所述第一辅助泵的出口 具有第一阀的管，其中所述预排气组包括串联连接在一起的第二副泵和机械主泵，并且其中设置有第二阀的管将所述第一副泵的中间点连接到所述入口 的所述第二次级泵。

公开(公告)号：US5341671A

公开(公告)日：1994-08-30

申请号：US949155

申请日：1992-09-23

申请人： Gilles Baret ,  Roland Gevaud

发明人： Gilles Baret ,  Roland Gevaud

IPC分类号： G01M3/20

CPC分类号： G01M3/202

摘要： A helium leak detector includes a gas analyzer and a secondary pump having at least on its discharge side a Holweck type stage. The pump is of a type enabling the suction pressure to be reduced to a value at least equal to 10.sup.-4 mbar and a discharge pressure which is sufficiently high to be compatible with the suction pressure of a dry primary pump having at least two stages. The secondary pump is connected to the low-pressure output of a sampling unit on an intermediate point of the secondary pump where the flow conditions are molecular. A sniffer probe is connected to the high-pressure side of the sampling unit. This high-pressure side is further connected to the dry primary pump between its at least two stages.

摘要翻译： 氦气泄漏检测器包括气体分析器和次级泵，其至少在其排放侧具有Holweck型级。 该泵是使吸入压力降至至少等于10-4毫巴的值，并且排出压力足够高以与具有至少两级的干式主泵的吸入压力相适应。 次级泵连接到二级泵的中间点上的采样单元的低压输出，其中流动条件是分子式的。 嗅探器探头连接到采样单元的高压侧。 该高压侧在其至少两个级之间进一步连接到干式主泵。

公开(公告)号：US5728929A

公开(公告)日：1998-03-17

申请号：US651748

申请日：1996-05-22

申请人： Roland Gevaud

发明人： Roland Gevaud

IPC分类号： G01M3/20

CPC分类号： G01M3/202

摘要： An installation for detecting the presence of helium in a fluid circuit, the installation including a tapping member constituting a volume comprising a first internal space and a second internal space separated from each other by a semi-permeable partition through which helium can pass, the first space of said tapping member being inserted in series in the fluid circuit, the second space being connected both to a gas source via an orifice having an adjustable aperture, and also to a pumping member via a pipe, the flow pumped through the pipe conveying the flow under viscous conditions towards a feed member connected to a helium leak detector.

摘要翻译： 一种用于检测流体回路中氦气的存在的装置，该装置包括构成容积的抽头构件，该构件包括第一内部空间和第二内部空间，所述第一内部空间和第二内部空间通过氦气可以通过的半透性隔板相互隔开，第一 所述攻丝构件的空间被串联插入到流体回路中，第二空间经由具有可调节孔口的孔连接到气体源，并且还经由管道连接到泵送构件，泵送通过管道的流动传送 在粘性条件下朝向连接到氦泄漏检测器的进料构件流动。

公开(公告)号：US4294106A

公开(公告)日：1981-10-13

申请号：US131121

申请日：1980-03-17

申请人： Roland Gevaud ,  Jacques Tallon

发明人： Roland Gevaud ,  Jacques Tallon

IPC分类号： G01M3/20

CPC分类号： G01M3/202

摘要： A leak detector comprises helium measuring means (6) for measuring helium sucked in by a sniffer (2) via a flexible hose (3) and a liquid nitrogen trap (5). A vacuum is maintained in the nitrogen trap (5) by a molecular diffusion pump (7) leading to a vacuum pump (18) which exhausts to the atmosphere. In order to speed the flow of gas, possibly including helium as a tracer element, along the flexible hose (3) most of the gas sucked in by the sniffer (2) is diverted from the inlet (4) to the nitrogen trap by a bleeder arrangement (12) connected to an auxiliary duct (11) which is itself connected to an intermediate point between two stages in the vacuum pump (18).

摘要翻译： 泄漏检测器包括用于测量由嗅探器（2）经由柔性软管（3）和液氮捕集器（5）吸入的氦的氦测量装置（6）。 通过分子扩散泵（7）在氮气阱（5）中保持真空，导致通向大气排出的真空泵（18）。 为了加速可能包括作为示踪元件的氦气的气体沿着柔性软管（3）的流动，嗅探器（2）吸入的大部分气体从入口（4）被转移到氮气阱 泄放装置（12）连接到辅助管道（11），该辅助管道本身连接到真空泵（18）中两级之间的中间点。