HU210490B - Sampling arrangement for gases dissolved in liquid and safety supplying gases into a vacuum system - Google Patents

Abstract

The present invention relates to an arrangement for sampling and safely introducing gases dissolved in a liquid into a vacuum system into which a probe housing (2) is connected to a gas-permeable membrane (1) submerged in a liquid (8) and a vacuum system (7). The novelty of the invention is that the vacuum system (7) is connected to the probe housing (2) by a valve (6), one or more electrodes (3 / a, 3 / b) in the wall (4) of the probe housing (2). ) is located at the input terminal (ai) of the electrical signal processing unit (5) of the electrode (s) (3 / a, 3 / b), and the electrical signal processing unit (5) is connected to the valve (6) by an electrical controller. EN 210 490 B lBATH Scope of description: 4 pages (including 2 sheets)

Description

The invention relates to an arrangement for the sampling and safe introduction of gases dissolved in a liquid, wherein the probe housing is connected to a liquid-permeable gas-permeable membrane on the one hand and a vacuum system on the other. This arrangement prevents the intruder fluid from being introduced into the vacuum system in the event of damage to the probe section.

The probe solutions used to sample gases dissolved in a liquid and inject them into a vacuum system (for analytical purposes, for example) do not contain a safety feature that would prevent the intruder from entering the vacuum system in the event of damage to the probe head.

When analyzing dissolved gases in a mass spectrometer, the immersion probe shall be connected to the vacuum system of the mass spectrometer. The liquid and the vacuum system are separated by a membrane through which the gas molecules in the liquid are diffused and, depending on the particular solution, are sent to the analyzer via shorter or longer lines. If the diaphragm is damaged, the liquid entering the vacuum space of the analyzer would render the apparatus unusable for an extended period of time and would require costly cleaning. The patented arrangement for protecting the system is the following: At least one sensor electrode is installed behind the gas-permeable membrane in the probe on the islands. Between the electrode and a reference point or two electrodes, the bursting fluid creates electrical conductivity. Using the electrical signal thus obtained, a valve is closed to seal the valve between the electrode (s) and the analyzer, thereby preventing the intruding fluid from contaminating the entire vacuum system. Damaged probe parts can be easily and quickly replaced or replaced. can be cleaned, minimizing downtime and costs.

In one embodiment of the arrangement of the invention, two sensor electrodes are inserted into the probe, where the intruder fluid provides electrical conductivity between the two electrodes (a so-called ground-independent solution), while in another embodiment, a sensor electrode is inserted into the probe and fluid creates electrical conduction between the probe housing and the electrode.

The arrangement according to the invention is described in connection with an exemplary embodiment, based on the drawings.

The attached drawings show

Figure 1 is a schematic representation of a possible (land independent) embodiment of the arrangement of the invention,

Figure 2 is a schematic representation of an alternative embodiment of the arrangement (an electrode).

According to one embodiment of the arrangement shown in Figure 1:

The immersion end of the probe housing 2 immersed in liquid 8 is closed by a membrane 1 permeable to gas molecules. The sensor electrodes 3 / a and 3 / b extend into the probe housing 2 through the insulators 4. A valve 6 is disposed between the probe housing 2 and the vacuum system 7. When the diaphragm 1 is damaged, the liquid 8 breaking into the probe housing 2 creates an electrical conduit between the electrodes 3a and 3b which is sensed by the electrical signal processing unit 5 and orders the valve 6 to be closed. The closing of the valve 6 prevents the vacuum system 7 from being contaminated by the intruding fluid 8.

According to another possible embodiment of the arrangement shown in Figure 2, only one sensor electrode 3 is located in the probe housing 2 and the intruding fluid creates an electrical conduit between the (grounded) probe housing 2 and the electrode 3 which is sensed and commanded by the electrical signal processing unit 5. gives the 6 valves to close. The closing of the valve 6 prevents the vacuum system 7 from being contaminated by the intruding fluid 8.

Claims (2)

PATENT CLAIMS An arrangement for sampling and safely injecting liquefied gases into a vacuum system, wherein the probe housing (2) is connected to a gas permeable membrane (1) submerged in a liquid (8) and a vacuum system (7), characterized in that the vacuum system (7) ) is connected to the probe housing (2), one or more electrodes (3, 3 / a, 3 / b) are placed in the insulator (4) in the wall of the probe housing (2), the electrode (s) (3, 3 / a, 3) / b) an electrical signal processing unit (5) with an input terminal (s), and the output of the electrical signal processing unit (5) being in electrical control connection with the valve (6). Arrangement according to Claim 1, characterized in that in the wall of the probe housing (2), only one electrode (3) is placed in an insulator (4) connected to one of the input terminals of the electrical signal processing unit (5) and the electrical signal processing unit (5) is electrically connected to the other input terminal of the probe housing (2).