DE1598261C - Device for sampling and analyzing gases - Google Patents

Description

while the required tightness of the device is already obtained.

According to an advantageous embodiment of the device according to the invention, in the case of using a working with periodic interruption Measuring device of the contactor effecting the measurement on a part of the device attached, which protrudes beyond the sheath.

Another advantageous development of the device according to the invention is that in Case of the use of an electrical measuring device, which by a built-in, rechargeable Source is fed, two clamps are attached outside the device.

The invention is described below with reference to the drawing, for example; in this shows

1 and 2 show two schematic sections of the casing the device,

F i g. 3 the electrical circuit diagram of a metering device of combustible gas in the weather, which with the known method of catalytic combustion works on a measuring wire of a measuring bridge,

F i g. 4, 5 and 6 three sections of the device equipped with the metering device, and

F i g. 7 the device in the hand of the user.

The jacket of the device, one of which is preferably Embodiment in FIGS. 1 and 2 shown is made entirely of an elastically deformable one Material, for example made of rubber.

It consists of a container 1 in which the sampling and analysis device is attached, as well a space 2 which is separated from the container by a wall 3 which is penetrated by a connecting opening 4.

The outer wall of the container is provided with a suction opening 5, while in the bottom of the room an outlet opening 6 is attached.

The bottom of the casing is provided with a bead 7 which makes the device a satisfactory one Gives stability.

In Fig. 3 shows the electrical circuit diagram of an analysis device which is suitable for attachment in the container 1 is suitable.

The analysis device comprises, in a manner known per se, a measuring bridge which is formed by a measuring wire D, a compensation wire C and two fixed resistors R and R ' . An adjustable resistor R ₀ completes this bridge, the measuring diagonal of which is provided with a galvanometer G, which is _{connected in series with an adjustable resistor A 1} , which is used to regulate the sensitivity of the galvanometer, and it also includes two rechargeable batteries 7 and 8 , which are connected in series and feed the bridge via a contactor 9 and an adjustable resistor R ₂ , which is used to regulate the voltage that is applied to the diagonal of the bridge.

Two recharging contacts 10 and 11 allow direct access to the terminals of the arrangement 7 to 8 via a diode J to which a resistor R ₃ is connected in parallel.

The measuring circuit connected to the galvanometer consists of a series connection of an adjustable high-value resistor J? ₄ , which enables the galvanometer to be used as a voltmeter, with a switch 12 which is coupled to the contactor 9 in such a way that one is in the rest position when the other is in the working position and vice versa, and with a test contact 13.

The voltage at the terminals of the batteries is checked by short-circuiting the contacts 10 and 13, the contactor 9 being in the rest position. The test circle closes over the entire bridge, part of which is in series and part in shunt, resulting in every change

ίο a bridge branch follows that the galvanometer gives an abnormal indication.

The normal display - d. H. if the circuit is undisturbed and the batteries are sufficiently charged - you can use the Galvanometer scale can be marked by a fixed index 14.

The F i g. 4, 5 and 6 show three schematic sections of the device that of the one described electrical circuit is adapted. Where F i g. 6 is a section along a vertical plane through FIG

Axis of the suction opening of the extraction device. The housing of the device, which is formed by shells 15 and 16, is enclosed in the container 1 of the casing and comprises a sealed chamber 17 in which at least the measuring wire D is arranged and which is connected to the atmosphere via a metal ring pressed into the suction opening S 18 is connected; it also comprises two rechargeable batteries 7 and 8 and the galvanometer G, which is protected by a cover 19 fixed on the housing, which ensures the tightness of the container; the galvanometer scale appears at the top of the device.

The recharging contacts are connected to the free terminals of the batteries by conductive angles 20 and 21 connected.

The space 2 is connected to the chamber 17 by means of a flap 22, which the passage of the Gas mixture in the direction of chamber 17 - room 2 (arrow / 1) allows.

On the other hand, it is connected to the atmosphere via a flap 23 which is located at the outlet opening 6 and allows the gas mixture to pass from room 2 to the atmosphere (arrow / 2).

The control button of the contactor 9 is mounted in the cover body 19, namely on the side on which the index finger of the operator's hand is normally located. The button is firmly connected to an elastically deformable plate 24, which also ensures the tightness of the device ensures.

When the sheath, as shown in FIG. 7 is shown, is held in one hand, so is sufficient pressing on the outer wall of the space 2 in order to expel the volume of gas contained in the space.

In order to introduce a certain volume of gas into the dosing chamber (arrow / 3), only the pressure of the Fingers to be decreased. Since the volume of the space 2 is generally greater than the volume of the Chamber 17, a single pressure on the room is enough to remove the chamber from the atmosphere it contains to free.

In order to fill the dosing chamber with a sample representing the atmosphere to be dosed, then only the process of being started all over again.

In the event that the electrical circuit contains the voltage test circuit for the batteries, the control contact 13 are formed by the ring 18, the

is on the same side as the recharge contact 10. Shorting 10 and 13 then takes place by means of any conductor of sufficient length. Although the device is everywhere can be introduced where the hand enclosing them can penetrate, there is the possibility that a sampling or a dosing at a higher level, for the operator not achievable point must be made. It can then be connected to the device in a simple manner Extension tube connected tightly to ring 18 by any known means is, for example, by screwing or fastening with screws.

The great simplicity of use of the device is evident from the description. It is light, takes up little space, is easy to store in a bag and can be carried in a convenient way Way to be operated by a single hand.

It enables the weather to be taken at a very short distance from the walls and in knolls the mining routes.

Furthermore, the coating, which is made entirely of flexible material, protects the dosing and measuring device effective against impact.

The measuring and dosing device can also do it

z. B. consist of a colorimetric device or of a device that is on another Principle than catalytic combustion on one

ίο heating wire is based.

The regulation of the voltage applied to the bridge can be improved by means of diodes d ' or appropriately arranged corresponding devices.

Furthermore, the ring 18 can be provided with all known filter devices 25.

Finally, the partition between the casing 1 and the space 2 can be simple stops be limited, which hold the case in its container.

1 sheet of drawings

Claims (1)

1 2 elastic device housing practically every impact directly. 1. Apparatus for sampling and analyzing net is because the housing is designed so spatially as gases that are held with a single hand and is 5 that it can be operated with one hand only on one side and the measurement can be made from one. This size is, however, in turn, the pre-device accommodating the housing and a suspension for a reasonably comfortable attachment of this housing, as an elastic pocket, to enable the bellows to be actuated,
formed gas suction device, which is known from German patent specification 1014 346 via valves with the housing interior and the io gas sampling tube, which can be connected at both ends with VerAtmosphäre, is provided with shut-off cocks and is provided against gases by the combination of the features that the and the used filling liquid is indifferent housing (15,16) in a container plastic open at the top, which after mechanical stress-shaped space (1) of a casing made of chung elastically returns to its shape. By arranging this elastically deformable material and selecting the material, it is possible to achieve increased impact and impact resistance to this space (1) through the housing (15, 16). This known gas sample is concluded that the elastic tube has no device for analysis bag (2) is formed on the jacket and of gases and also does not allow operation with a made of the same material that the bag hand to. (2) via an opening (4) in which the suction 20 Furthermore, from the German utility bag (2) and the room (1) separating wall pattern 1 719 993 and the USA patent 2 546 273 (3) Can be connected to the inside of the housing, the devices for the quantitative testing of burning in turn known only via a suction opening (5) in cash gases, which is used as a shoulder device The jacket wall forms with the surrounding atmosphere and is sealed with an elastic gas suction ball is connectable, and that the reading scale 25 can be seen. However, these devices are complicated open end of the container-shaped space is adorned, awkward to use and because of their (1) is arranged. spatial size difficult to protect from impact. The object of the invention is to provide a device for extracting and analyzing gases of the initially 30 guided type in such a way that a largely shock-proof and easy-to-use device is obtained. The invention relates to a device for developing This object is achieved according to the invention would take and analyze gases with a single by combining the characteristics that the hand can be held and operated and from 35 housing in an open-topped container-shaped space a housing accommodating the measuring device, a casing made of elastically deformable material and one attached to this housing, arranged as an elastic material, and this space through the pocket trained gas suction device is hermetically sealed that the elastic housing which is molded onto the casing via valves with the interior of the housing and the pocket and is made of Atmosphere is connectable. 40 is made of the same material that the bag is about A device of this type is known from German an opening in which the suction pocket and the space utility model 1856 321 are known. This known separating wall with the interior of the housing connecting device consists essentially of a flat bar, which in turn only has a box-shaped housing made of compact material via a suction opening, in the jacket wall with the ambient atmosphere that has a recess in which the gas 45 can be connected, and that the reading scale is arranged on the open bellows forming the suction device at the end of the container-shaped space.
is. This bellows is connected to the housing by this combination of features, which is an inte- Bonding connected. The reading scale of the device is integrated in the design of the housing and gas intake at the upper end of a broad side of the direction, on the one hand a very high one Housing, while control buttons on a 5 ° impact resistance, due to the narrow side are arranged. use of elastic material and the disadvantage of the arrangement in the known device is before voltage of the measuring device and the scale within all that production and assembly are relatively complex of the hand that encloses the device in operation are, as the housing and the gas suction device operator, and on the other hand an optimal one forming bellows, which also achieves a relatively tight seal of the device despite its simple construction, is complicated to manufacture, manufactured separately and because the special design of the room for Aufdurch a separate gluing process with each other would take the measuring part and the elasticity of the for need to be connected, with a Schmieeine with regard to the sheathing material used Allow perfect functioning on a good and gene of the envelope on the measuring part. the permanent seal is important. 60 Multiple use of the sheathing with regard to Furthermore, it must be taken into account that such precautions increase the shock resistance and direction for the extraction and analysis of gases development of an optimal seal lead to a often in dark and confusing rooms in which there is a constant risk of construction and allow extremely economical the operator with the measuring device against 65 production, since the elastic sheath in one Walls or other objects abuts, being made before the operation and the measuring device in especially the simple way housed inside the housing without glue processes or the like Measuring device is endangered, because the un- can be used in this sheathing and