DE1598541B2 - - Google Patents

Description

Vessel which is higher than the pressure in the system to which the liquid is to be fed and presses the liquid located between the upper edge α and the lower end of the immersion tube 3 through the capillary S into the system 6 , ie by changing the distance between α and b , the amount of liquid dispensed can be continuously adjusted.

For use in automatic repetitive mode, the device is placed in the armpit mounted on a motor shaft. The motor is set in motion by a current pulse, and the Pivoting of the vessel and the opening and closing of the solenoid valve 8 are carried out by electrical means Contacts controlled.

As can be easily seen, the device according to the invention is characterized by a simple and cheap construction, easy cleaning and easy adjustability of the the amount of liquid to be dosed. In addition, it has no contact with the liquid Moving parts coming up, and dripping of the liquid is impossible, since the capillary 5 is flushed by the gas at the end of the dosing process.

1 sheet of drawings

Claims (4)

i 2 siergefäß must run out freely, so not under Uber patent claims: winding of a counter pressure can be funneled into a system. 1. Device for dosing liquids in chemical engineering and in laboratory law with one from a pantry and one 5 nik but there are a number of methods that one Dosing space existing vessel, which so require in two such infiltration, and in many cases still Positions can be brought that variable in the amount of liquid to be introduced a position should be liquid from the storage space. Such a process is e.g. the preparain the metering chamber flows, while in alternative gas chromatography. Since this is a ren position, the liquid volumes as a result of their discontinuous process, must be for Einleirer Gravity 'are separated from each other, so substance is dosed again in each separation cycle characterized by that in the Do- '. sierraum (2) from above a height-adjustable "laüchlohr (3)", which can be split into the gas, through which chromatography has hitherto been pneumatic or electric adjustable stroke edge (a) of the dividing wall between the dosing chamber. Since in pumps of this type the substance to be metered (2) and storage chambers (1) and above the end '(fr) rende substance with the movable piston in Bedes immersion tube ,, (3) If the liquid in it comes into contact, there is a slight risk that the metering chamber (2) will be pushed out 2. Apparatus according to claim 1, characterized in that the entire arrangement is always filled with substance, such an arrangement tends to pivot towards a point (A) and that drip, which is undesirable in any case . Pivoting around this point also creates difficulties in the adjustment required for cleaning the pump system. lungs can be achieved. 25 The object of the present invention is to 3. Device according to claims 1 and 2, for the reasons a metering device of the type mentioned at the beginning characterized in that the supply line (7) for th genus to be developed in such a way that it leads to the pressurized gas and the discharge line (5) for the dosing of liquefied material, which can be changed in terms of quantity Liquid are flexible in such a way that they are able to, even by overcoming a Ge relative movement between the fixed 30 back pressure is suitable. Parts and the moving vessel compensate- This task is achieved according to the invention by -— -ren -.- - - ... solves that in the metering room from above a in itself 4. Device according to claim 2, characterized in a known manner in its height adjustable immersion characterizes that the point (A) around which the pipe protrudes, through which occurs when using pivoting movement, firmly with the shaft 35 pressure below the upper edge the partition wall is connected to the motor and that the dosing space and storage space and above the pivoting movement as well as the opening and closing end of the dip tube located liquid from ßen one in the supply line. (7) for the compressed gas is pushed out of the dosing chamber,
located solenoid valve (8) by in suitable The invention will be controlled in the following on the basis of a ter way arranged electrical contacts 40 embodiment in connection with the ZügehÖ. rigen drawing explained. ■ ^; The device shown in the drawing ' has a storage space 1 and a metering space 2 on, which together form a one-piece, preferably made of 45 Form an existing glass vessel. A height-adjustable immersion tube 3 protrudes into the dosing chamber is held by a locking device 4, The present invention relates to one which the dip tube 3 against storage device at the same time for dosing, of. Liquids with. Rauml and Dosierraum2 seals. The diving one from a storage space and a metering tube 3 is through a flexible capillary 5 with the syraum existing vessel, so connected in two positions system 6, which brought the dosed liquid can be that in one position amount is to be supplied, for example with the Liquid flows from the storage space into the dosing space evaporation chamber of a gas chromatography, while in the other position the liquid. see pillar. An equally flexible pressure line 7, Capacity volumes are separated from each other 55 normally by a solenoid valve 8 as a result of their gravity are. is closed, opens into the upper part of the dosing The known devices of this type are device. The entire device is around an armpit pivots, initially into the position in which it is pivotably mounted. To fill liquid liquid from the storage space into the metering space 60, the closure device 4 is removed and flows and then into the other position in which the immersion tube is pulled out.
Liquid volumes are separated from one another. The will move the vessel clockwise around axis A. Dosing space is pivoted in the known devices, so liquid runs out of the supply of an outlet, from which the liquid space 1 in the dosing space 2, which can flow to the outside after returning to the other position. 65 pivot into the starting position up to the top. The known metering devices have the edge α of the partition between the storage space 1 and the disadvantage that the metered amount of the liquid metering space 2 is not filled. If the magnet valve can now be changed and the liquid is opened from the door 8, gas flows into it at a pressure