DE1598990C - Immersion electrode arrangement for measuring the electrical conductivity of electrically inhomogeneous liquids - Google Patents

Description

3 4

connected fastening device for a rigid, correspondingly stepped truncated cone 9 made of insulating or flexible tube for receiving the supply material introduced as a pressure piece for the are provided. An electrode arrangement of this contact means used coil springs 10, 11, 12 Design can be simple and very robust on and 13 is used, which is on the one hand on the electrodes, be built. Cleaning and maintenance of the cylinder 5 on the other hand on the step shoulders of the truncated cone Support the electrode body with its smooth fes and the by means of the axially parallel Boh outer surface can quickly and easily made stanchions 14 of the truncated cone 9 guided lines will. By using a rigid one or with the flexible one located on its upper side 15 The pipe for receiving the lines can be 16 connected. The coil spring 13 the electrode arrangement at a considerable distance 10 consists of only a single turn. The Leivon the rest of the measuring device were used, those from the connections 16 to the actual long. A pump and a separate measuring circuit measuring device are guided in the pipe 17, run are no longer necessary. which is connected to one with internal and external thread

Around the stray field that is attached between the two extensions 18 of the electrode 1 that are seen in this way

current-feeding electrodes in the surrounding 15 is that a fitting on the external thread over-

In its spatial expansion nut 19, liquid forms the end of the tube 17 at the top

To keep the voltage as small as possible and thus clamp a possible edge of the extension 18. The interior

Iiche influencing the stray field and thus the winds of the extension 18 is used to screw in the

Measurement accuracy due to the nearby wall part of the truncated cone 9, which depends on the screw-in depth

of the container or the like, the contact pressure of the contact springs 10, 11, 12 and

seen that the power supply on the two in 13 can be adjusted. Because it's when measuring

Neren electrodes happens, whereby the spatial conductivity is necessary, the temperature drift

Expansion of the stray field and thus the risk of the liquid to be measured must also be taken into account,

a disruptive influence is reduced. If possible, the required temperature sensor is in

According to the main patent 25, outer electrodes are to be attached in the vicinity of the electrodes. This Ford-

the measuring voltage tapped. One result of this tion is in the embodiment described

Another advantage resulting from the arrangement is the fact that the temperature sensor

possibility of using large-area chip 22 in an axial bore 20 of the truncated cone 9

voltage collector electrode, which is less sensitive to and with its active part in one

mechanical contamination and polarization finger-like, coaxial extension 21 of the electrode 4

appearances as the well-known voltage elec- tric protrudes. The fit of the two

trod with a very small surface. inserted parts 21 and 22 is chosen so that a possible

One embodiment of the invention is in which good heat transfer takes place. On the

Figure shown and described below. Extension 21 is a terminating part 23 made of good heat

The immersion electrode assembly consists of conductive insulating material screwed on, which a cylindrical body, which is made up of the four electrodes, in terms of shape, the cylindrical body of the Eintrodes 1, 2, 3 and 4 and the immersion electrode arrangement in between, complete and equal spacers 5, 6 and 7. Electrodes as used as shock protection. Due to the chosen Intermediate pieces are designed in the shape of an annular disk. and have the same outer diameter as the inner electrodes 2 and 3 and voltage counter the inner diameter of the ring disks measured on the two outer electrodes 1 and 4, levels are. Electrode 1 and intermediate piece 5, the annular disk-shaped electrodes can all of trode 2 and intermediate piece 6, electrode 3 and Zwi- be approximately the same thickness, which in addition to the already Interchangeable pieces 7 each have the same inner diameter as a manufacturing advantage. Put together results in the cylinder 45 indicates. Another advantage of this setup is in it shaped body to see an interior space 8 in the form of one that the spacers 5,6,7 from hard-graded Truncated cone, with the bare rubber made and with the electrodes 1,2,3 Chen of the electrodes, the shoulders of the steps and 4 are connected by vulcanization form. In this stepped interior 8 is a can.

1 sheet of drawings

Claims (8)

1 2 claim 7, characterized; that the claims: coaxial extension (21) with external thread for receiving an insulating material with good thermal conductivity 1. Immersion electrode assembly for measuring tion material existing terminating part (23) verder electrical conductivity is electrically inhomo- 5 see. gener liquids with four electrodes arranged spatially one behind the other, two of which are claim 1 or the following, characterized in that for supplying the measuring current (current electrodes) the annular disc-shaped spacers and two for taking off the measuring voltage (S, 6, 7) Made of hard rubber and used with the electrodes (voltage electrodes), the current io (1,2,3,4) being connected by means of vulcanization, electrodes inside and the voltage electrodes
on the outside are, according to Patent 1,258,973, characterized by electrodes (1, 2, 3, 4) designed in the shape of an annular disc, which are provided with intermediate pieces 15 in the form of an annular disc
(5,6,7) of insulating material one preferably form a cylindrical body, in which the main patent I 258 973 relates to an immersion the inner openings of the electrodes of the dual electrode arrangement for measuring the electrical between pieces formed space (8) means for con-conductivity of electrically inhomogeneous liquids clocking of the electrodes are arranged and 20 with four spatially arranged one behind the other one electrode connected to the lowest electrode (4), two of which are used to supply the measuring current cylindrical insulating end part (23), so- (current electrodes) and two for removing the measuring serve as a voltage (voltage electrodes) connected to the upper electrode (1) and in the Fixing device for a rigid or the current electrodes inside, the voltage electrodes flexible tube for receiving the supply line are in front of 25. The immersion electrode assembly is are seen. designed as a so-called stray field electrode. 2. Immersion electrode arrangement according to There are immersion electrode arrangements known, Claim 1, characterized in that the ring-shaped are tubular and where the disc-shaped electrodes (1, 2, 3, 4) protrude from four electrodes into the interior of the pipe, are approximately the same thickness. 30 with the two outer electrodes a larger one 3. Immersion electrode arrangement according to surface and having a constant claim 1, characterized in that the inne- current are fed, the current constant holder, Ren openings of the electrodes (1, 2, 3, 4) and the z. B. a voltage source with a very large .Inner spacers (5, 6, 7) expand so that in resistance delivers. With the two inner electrodes, the cylindrical body creates an interior space (8) with 35 which is created on the measuring section within the three stages of the tube, the shoulders of the liquid flowing through the tube being created by the electrodes. measured drop, which corresponds to the fluid resistance 4. Immersion electrode arrangement according to proportional. To reduce the voltage drop as possible 3, characterized in that to measure in the nau, it is necessary for the chip graded Interior (8) of the cylindrical grain size measurement electrodes used according to Mögpers a correspondingly graded truncated cone approximated point or line shape (9) is introduced from insulating material. form, which makes them, however, susceptible to failure again 5. Immersion electrode arrangement after contamination and the like. The cleaning solspruch 1, 3 and 4, characterized in that rather tubular immersion electrode assemblies, the contact means of helical springs (10,11, ⁴ 5 is difficult because for this purpose they consist of the tube 12,13), which are on the one hand on the Electrical line ■ must be dismantled. Should liquid trodes, on the other hand, be placed on the step shoulders of the. that are supported in channels, containers or the like. 14) connected to the measuring circuit fed by a pump at the top 5 °, the connections (16) located on the side. The object of the invention is to provide an immersion electrical system. the arrangement of the type mentioned above to create 6. Immersion electrode arrangement according to Anfen, in particular for use in channels or claim 1 or the following, characterized in that containers which have the above-mentioned disadvantages that the top electrode (1) with an outer and 55 does not have. The invention is based on the idea of an internally threaded extension (18), which is why the subject of the main patent should be designed to form internal threads for fastening the cone, so that the liquid to be measured stump (9) and its external thread flow around it . Such an immersion electrical connection with a union nut (19) for the arrangement of the ends is characterized ^according to the invention. the with annular disc-shaped intermediate 7. Immersion electrode arrangement according to pieces of insulating material, a preferably cylindrical claim 4, characterized in that the conical body forms, in which through the inner truncated (9) for receiving a temperature guide openings of the electrodes and the intermediate (22) has axial bore, the ⁶ S pieces formed space means for contacting the up to a coaxial extension (21) are arranged on the lower electrodes and extends with the lowest side of the lowermost electrode (4). Electrode connected cylindrical insulative 8. Immersion electrode arrangement after the connection part, as well as one with the upper electrode