DE2619273A1 - EQUIPMENT FOR GRINDING WITH SAND - Google Patents

Description

P AT E N TA NI WAu ι "Ε

HELMUT SCHROETER KLAUS

DlPL. -PHYS. DIPL. -INC.

Morehouse Industries, Inc. kn-rni-15

April 22, 1976 Se / P

Device for grinding with sand

The invention relates to a mixing or grinding device of the type of devices for grinding by means of sand the particles in liquids grind to a high degree of fineness. In particular, the invention relates to an improved arrangement for the Attachment of a grinding container to a stand and the appropriate controls for the grinding operation.

Grinding with sand is a proven, practical, continuous and efficient manufacturing process for the fine distribution of particles in liquids in order to produce smooth, evenly finely divided products. A good An example of this is the fine division of agglomerations of pigments in paints. The process is applicable to a wide variety of inks, dyes, paper coatings, chemicals, Coatings of magnetic tapes, insecticides and other materials can be used that require grinding up to a high degree of delicacy is required.

In the typical sand milling workflow, the material or sludge to be processed is introduced at the bottom of a working chamber and pumped up through a milling medium often referred to as sand, although it is usually a fine grain grit rather than sand. In the container forming the working chamber there are rotors for grinding the sludge while it is being pumped through the medium. 609846/0934

D-707 SCHWÄBISCH CMOND COMMON ACCOUNTS: D-β MUNICH

Telephone: (07171) 56 90 Deutsche Bank Munich 70/37369 (BLZ 700 700 10) Telephone: (0 89) 77 89

H. SCHROETER telegrams: Schroepat Schwäbisch Gmünd 02/00 535 (BLZ 613 700 86) K.LEHMANN telegrams: Sdiroepat

Bodogas «49 Telex: 7248 468 pagdd Postscheckkonto Munich 1679 41-804 Lipovskystraße 10 Telex: 5 212 248 pawe d

Usually the grinding container is cylindrical in shape and attached to a stand so that the rotor axis is extends vertically and parallel to the stand. The motor that drives the rotor is usually in the upper part of the Stand attached and straps are used to transmit the torque used by an engine on a pulley that is attached to the top of the drive shaft that turns in turn extends into the container Mnab, where it is connected to the rotors.

A manufacturer or processor who uses an apparatus for grinding Using sand will often have more than one type of mud that he wishes to process with the device. E.g. could be a Paint manufacturers want to use the device to process paints in different basic colors. Quite often, however, such production processes cannot be continued for very long. The cost of a device for Grinding by means of sand is such that it is usually not practical to just add another device for each different one To buy variety of sludge that the user may wish to process. Instead, the user will prefer the Container and the pump as well as the connecting lines that the fabric goes through before processing the next substance. Cleaning takes a considerable amount of time takes about half a day, and is very costly in terms of manpower and lost operating time of the device.

Another attempt to solve this problem has been when a certain process sequence is completed, the Remove the container and store it without complete cleaning until the same type of material is processed again will. This approach has an advantage in that

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the remaining substantial part of the device for grinding by means of sand is kept in constant use and the User only needs to keep an inventory of containers. However, due to the way in which the container is attached a fair amount of labor and expense is required in the known systems to remove a container, to transport it to the storage room and insert a new container again. There is also a risk to the Safe handling of the container according to the known state of the art.

For example, in one known design, the drive shaft extending through the top of the container is in sections divided so that it can be separated from the upper part of the drive shaft with the drive means of the grinder connected is. The separation requires the removal of some screws, which takes time. Has even greater importance however, the need for time to reassemble the drive shaft as the two shaft sections are carefully need to be aligned. A small cart with wheels is used to remove the container from the adjacent stand placed below the container to support the weight of the container. The screws holding the container to the stand and nuts are then loosened so that the container can be rolled away. This procedure is rather unsafe in that when the container weighs a few hundred pounds and is relatively tall compared to its diameter. Accordingly lies the center of gravity of the weight is quite high and great care must be taken to prevent the load from falling over prevent what would of course be dangerous for the staff and damage the device. Quite often the faces are about which such a load must be rolled, made of rough concrete with cracks, causing further danger to the rolling of the little cart means.

Accordingly, there is a need for an improved method of replacing and handling a milling container both in terms of cost and safety. According to the present invention, the container is attached to the stand in such a way that that it can be easily removed by simply raising it slightly and then safely removed from the stand.

In a preferred embodiment, this is accomplished by a pair of downwardly facing V-shaped support posts at the lower end of the Container and a like pair of support posts at the top of the container, the support posts so formed are that they fit over pins protruding horizontally from the stand. Holding elements on the pegs limit the stand Gaps to accommodate the supports attached to the container. The rotor drive shaft protruding from the container carries a pulley or other driven element attached to the stand by a belt or other Motor connected power transmission means is driven. The belt is put through a tension pulley mechanism like that tensioned so that tension can be easily released, thereby removing the belt from the upper end pulley the drive shaft is possible. Accordingly, the drive shaft and pulley can be moved as one unit with the container which eliminates the laborious separation and subsequent realignment of divided shaft sections.

It is contemplated that the container could be removed from the stand by means of a lift truck. One lifting approach is connected to the container near its middle section and the two GabeS-arms of such a vehicle can be on opposite sides Pick up sides of the container. Preferably, there are spring-loaded latches on the lifting lug of the container that fit into holes engage at the ends of the fork arms of the fork lift vehicle so that the container is securely connected to the "fork.

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With such an arrangement, it is easy to lift the container sufficiently to hold it from the holding elements to the To get free pegs, then move away from the stand in a horizontal direction and. to spend in the parking area.

If a container is to be attached to the stand, the procedure is simply reversed, but the advantages are V-shaped supports and the Haiteelemente during the fastening process particularly clearly. The V-shape of the supports correctly centers the container on the peg supporting it in a lateral direction with respect to the stand. Even the holding elements are preferably provided with a conical or tapered surface on the side facing the stand When the V-shaped supports run against this surface, they are urged against the stand too, so that the vertical Parts of the support brackets are pulled to the stand for tight contact. That way it is easy to prop up the stretcher Align the container with the tenons and lower the container into its final position. Because of the adjustability The tensioning pulley mechanism that creates tension in the belt makes it easy to pull the belt over the pulley to the Slip over the drive shaft so that the rotor is ready for operation again is. As a further feature of simplification, connections on the container for the sludge to be processed or be designed as quick-release couplings for cooling water. It was found that the whole process in a couple Minutes can be carried out by relatively inexperienced fork lift drivers.

Most devices for grinding by means of sand are between two and a half and three meters high and the drive mechanism for the container rotor is located at the top of the device. the end for this reason it is necessary to separate and connect the drive means; that a person is the highest point of unity achieved. For this purpose the device is in a practical way with

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Ladder rungs or steps are provided on a rear cover, which also houses the drive motor and other facilities includes. The acoustic insulation of the cover reduces the noise level in the vicinity of the device, which is desirable for many reasons, including regulatory compliance.

With high-pressure sand grinding, the pressure to pump the sludge through the container is not great for low-viscosity materials, however, highly viscous substances require pressures of up to 3.5 atmospheres in the grinding container. Pressures of this size require a corresponding one Back pressure on the outside of the seal in the area where the rotor shaft emerges from the container. That way will a closed chamber is formed around the outside of the seal and pressure is generated within the chamber via a working medium, which is higher than the pressure inside the container. It is important to monitor this seal pressure as it is too low Pressure can cause a leak and, more importantly, damage the sealing elements due to the possibility may be that some of the grinding media is forced out through the seal.

It is also important to monitor the product temperature and the pressure inside the container. It is also desirable to ensure that the pressure of the cooling water in the cooling jacket surrounding the container is in a predetermined range lies.

If abnormal pressure occurs, it is desirable to stop the pump for the fabric to be processed until the malfunction; is corrected. In the event of a large number of detected conditions and thus a large number of possible malfunctions that lead to a halt of the pump, it would be useful for the operator to know what condition caused the stop.

609846/0934

But it is of even more fundamental importance for the operating or maintenance personnel to first know that the The pump was actually stopped. Because of the frequent use of this type of equipment in a noisy environment together with other industrial devices in operation and because the device is used for grinding by means of sand is not continuously monitored, it is quite possible that on a particular machine the pump is running for a considerable amount of time Time is off before an operator becomes aware of the problem.

Accordingly, there is a need to provide suitable ones Signals that indicate when a malfunction occurs and what type of malfunction it is. According to another Features of the present invention are sensors for a number of pressure parameters of the grinding operation and these Sensors are connected in such a way that they always stop the motor driving the pump when one of the sensed parameters is outside a predetermined range. A warning or display device, e.g. a lamp or an audible signal generating device is connected to be energized when any of the sensed parameters are outside of its Area.

In a preferred embodiment, the pressure of the material to be processed, the pressure of the cooling water and Pressure switches responding to the pressure on the seal are connected in such a way that they switch on lamps when the pressures exceed, half of the predetermined range. These lamps show which of the parameters are outside of its permissible range lies. If desired, these lamps can be kept on so that an indication of the cause .stopping is maintained even if the to do so leading condition no longer exists when the operator arrives. The lamp can be switched off by hand

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will. In addition to the lamps indicating the respective malfunction, the control circuit can contain a special lamp, which only indicates that the pump motor is switched off.

Often it is particularly important that the temperature of the material to be processed is checked The fabric does not exceed a certain height, otherwise the fabric could be damaged. Therefore, according to one Another feature of the invention is a temperature-responsive, an audible signal generating device included in the control circuit. So .. becomes an operator in the Area warned even if it is in a part of the building from which the device cannot be seen. In the state of excess temperature, it is preferable that the pump for the product to be processed continues its operation, because an interruption of the incoming cool product could exacerbate the situation.

The training with the removable container is suitable for high pressure as well as suitable for low pressure operation. Quick disconnect lines are provided for the various feed lines to facilitate removal of the container.

The design according to the invention generally has the advantage of being easier, faster, cheaper and safer to maintain and maintain Operation option.

In the following description, exemplary embodiments of the invention are explained with reference to the drawings. It demonstrate

Fig. 1 is a perspective view of an apparatus for grinding by means of sand,

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Pig. Figure 2 is an exploded perspective view of a support bracket on the container along with one on the Supporting pegs and retaining element attached to the stand,

Fig. 3 shows a section along the line 3-3 of FIG. 1 for illustration the design of the supports and the supporting tenons,

Figure 4 is a perspective view of the idler release mechanism for the belt drive,

FIG. 5 is an exploded perspective view illustrating the manner in which the grinding jar of FIG is removed from the stand,

FIG. 6 shows a section along the line 6-6 in FIG. 5 for the purpose of illustration the cooperation between the lifting fork arms and the spring-loaded retaining latches,

7 is a perspective view of the rear of the device for grinding by means of sand to illustrate the rear Cover and the ladder,

FIG. 8 shows a section through the cover along the line 8-8 in FIG. 7,

Fig. 9 is a perspective view of a further embodiment of a device for grinding by means of sand for Illustration of a detachable container of a high pressure unit,

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Pig. Figure 10 is a view, partly in section, of the upper part of the grinding container of FIG. 9 to illustrate the seal assembly of the rotor shaft,

11 shows a schematic representation of the cooling / lubricating system for the high-pressure seal from FIG. 9,

Figure 12 is a schematic representation of the electrical control system for the device for grinding by means of sand.

According to Fig. 1, the device for grinding by means of sand includes a supporting column or stand 10, which is on a platform or base plate 12 is attached. The stand 10 has a rectangular cross-section and is made of heavy metal plates to support the weight of a cylindrical container 14 to carry, which assumes a vertical position and is attached to the stand 10. Liquid to be processed in container 14 is fed by a pump 16 carried by the stand 10 and driven by a motor (not shown) in the stand will. The material exiting the pump 16 is fed through a hose 18 to an inlet at the lower end of the container 14 and pumped up through the container and out of tube 20 at the top of the container.

Within the container 14, a plurality of rotors 21 are attached to a shaft 22 (FIGS. 5 and 10) which exits at the upper end of the container therefrom, extends through a tubular shaft housing 25 and into a gear housing 24 which extends at the upper end of the stand 10 is attached. In FIG. 5, a driven pulley 26 fastened to the upper end of the shaft 22 and a drive pulley 28 fastened to the upper end of the motor 17 are also shown. A belt 50 transmits the drive torque from the drive pulley 28 to the driven pulley 26. A tension roller mechanism 32 with a tension roller 33 on the upper wall 11 of the stand

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creates tension in belt 30. As from Fig. 5 As can be seen, the housing 24 is hinged or other suitable means so that it is in the open position can be swiveled.

The operation of an apparatus for grinding by means of sand is well known. While the material to be processed upwards is pumped through the container, the rotors in the container are rotated by the drive as described. Bring the rotors a grinding tool in motion, commonly referred to as sand, although in its typical form it is granular prepared material is. The combination of the moving granular material with that under pressure from the working medium pumped liquid grinds or grinds the particles contained in the liquid, so that the result Product is very fine and well mixed.

As explained above, it is often desirable to move from processing one particular material to processing another. In order to do this with one and the same container, it is necessary to clean the container, which takes a considerable amount of time takes. In many cases it is preferable to relocate the container and keep it until the same Material is to be processed again. In the meantime, another container is placed on the stand to process the attached to the next material. The container 14 of Fig. 1 and is mounted so that it is easily removable. Supports are attached to an annular flange 34 at the lower end of the container. As best seen in Figure 3, each support post 36 includes a horizontally extending portion or flange 38 and a downwardly projecting portion 4o. Of the downwardly projecting section 40 has a downwardly open V-shaped recess or notch 42, which is enlarged in FIG is shown. Support posts 36, each of which has a notch

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of this type are arranged on opposite sides of the container 14. In fact, the horizontal ones Sections formed as a single flange 38, which extends transversely to the container 14. Each notch 42 fits over one Pin 44 which protrudes horizontally from the stand 10. A holding element 46 is connected to the pin 44, so that the holding element and the adjacent wall of the stand Io define a space for receiving one of the V-shaped notches 42. As as can be seen, the support member 46 has a frustoconical surface 46a which is tapered towards the stand 10, such as can best be seen in FIG. The pin 44 is in the Stand 10 screwed and a handle 50 is attached to the outer end of each pin 44 to rotate the pin and can in this way the holding element 46 in the direction of and towards the stand 10 for the purpose of correct positioning of the holding element 46 to be able to move.

The top of the container 14 is similarly two-dimensional. Support supports 36 are provided which are attached to an upper flange 54 on Containers are attached. The downward V-shaped notches on opposite sides of the container 14 work with two pins 44 extending horizontally from the stand 10 together in a manner similar to that of the lower support posts the case is.

On a flange 56 of the central portion of the container 14 is a lifting lug 58 for lifting and carrying the container attached and contains two horizontal plates 60 and 62 at a mutual distance, facing each other on opposite sides of the container and are connected by means of short side parts 64 so that they, together with the container, openings 66 for receiving the lifting fork arms 68 of a lifting fork vehicle

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limit, as can be seen in FIg = 1 and 5.

On the upper plate βθ above each of the openings 66 there is a locking mechanism 70 for securing the container to the fork arms 68 of the lifting fork vehicle. In particular, according to FIG. 6, an annular housing 74 is provided in which a bolt 76 is mounted vertically and. goes down through a hole 78 in the horizontal plate. The Ver ^ iegelimgs "mechanism 70 includes mi © h © Ine Dr-uckfea © ^ 80, which is interposed between the upper end of the bolt J6 and a cap 82 at the upper end of the annular housing 74 ο The compression spring * 80 presses the latch 76 downward is oil © opening 66, so that it is in the path of the lifting fork arm 68 ö © s Hubgafoelfalipzeugss. As can be seen, the iiafcs ^ ® EM © 76b of the Hiegel fS is cut off in the right way from the stand 10, so that the bevel is directed against the Spits® © ines into the opening 66 entering lifting fork lines 68 _o Accordingly, oil © chamfer on the bolt * that d®r HnbgabeiaKß of Hubgabelfahneug © ^g> AEEN latch up from the BaM ü® @ Hmögabslarmss stölt »Dsr Hubgabelarm is _£ formed on top seiaor jslt eia @ ffl Loelü 73 as shown in FIG. 6 is to be seen. Therefore falls de ^ Hiegel 76 * as soon as it is located above dera Loeh 73 naefo mi ^ s in this one _s making it the Hubgabelapa 68 FÖJ with the ©? Βθ @n plate and daraifö locked to the container 14th

A pin extension 77 extends through the upper cap 82 of the ring-shaped housing 74. A handle 84 made of a second, smaller pin goes transversely through the pin extension 77 and thus creates a handle for the operator to lift the bolt 76 ,, as soon as this is desired. Also at the upper end of the locking mechanism 70 ^β * ^η pivot arm 86 is mounted, the & n the annular housing 74 by means of the sleeve and bolt 88 is fastened * S® that it in a horizontal plane

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If the bolt 76 is pivoted, the pivot arm 86 can be pivoted to such an extent that it lies below a locking ring 90 on the bolt 76 and thus holds the bolt 76 in its retracted or unlocked position. In order to let the locking take place automatically due to the spring force, it 1st only necessary zn bring the Ssliwenkare 86 außes · engagement so that the Bieg ©! 7β can be freely iTlrä down and down "The Sperrlag 90 'begreriist the Smoli defrosted geriefot @ t® occupancy the Hi © g © l§ 7β on? Gh .Anschlag at the ^j cap eirm To be siclaer © ^ ® ^ Ys ^ isgeltsag desired _p ^ jenn there is a ^ r bolt JS in hole 75 öos Hwbgabelai, \ ii (ss 68 is located, Äsr cSshwenkaria 86 over dlas © bsi? ® Ead @ $ © e Griffes 84 gi weräsn »luf this Ifeiss lies ä @ j? swivel arm isi Weg deg Riegel 76 imß, itei _s essIi ans® «pulled

In Fig. 4 is dtei ³ v @ ffsfe © llbsi. "© SpamiffQllen-Meehasalsmus 32 shown. The © tensioning pulley 33 ä-ßfe a ^ slibag = ma an axis loo on a plate 102 gel & QOist- _s äi, ® @@ Iiw © ß! iöap wm is attached to the motor shaft 104. On the plate 102 l3 © find © -fe on the opposite side of the Spaonroll® 33 M @ a S @ it @ © in © SehnellbefeicherungmechanisiTiiiS 105, with its help® dl © Spamarolle 33 can be pivoted into engagement with desss Giant 30, w & tension to this, this mechanism 105, the center position on the principle of perpetrators addition, based * contains a ns.dk Qben directed holder 1Q6 _S is secured to the pivotable plate 102nd a hand lever I08 is pivotally mounted in a vertical plane on the holder I06 _a as indicated by the arrow in Figure 4, "the lower end of Eanöhebels io3 is bifurcated, so that it comprises the holder 106th two links 109 are on the outside of the The forked Eades of the hand lever 108. The other ends of the? Lealcer 109 are dnreti © connected to a pin 110 on which the eye 112 of the end of a heavy ring 114 sits “Dag sMgbs! sä © fi @ j? HiEigsQhraube 114 lies

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in a slot 116 of an upstanding nose 118 of the top wall 11 of the stand 10. One on the end of the eye bolt 114 screwed nut 122 engages the side of the upturned tab 118. A safety pin 124 goes through the upper ends of the upwardly directed nose 118 and holds the eyebolt 114 in the position shown in FIG.

The tension roller mechanism 32 is shown in Fig. 4 in the position in which tension is exerted on the belt 30 during operation. It can be seen that the plate 102 is clockwise can be rotated to force the tension pulley 33 to to apply further tension to the belt 30. This tension can be adjusted by the nut 122, which is attached to the End of the eyebolt 114 is screwed. However, the nut 122 is only used for an occasional tension adjustment used. To quickly release or exert tension on the belt 30, the safety pin 124 is withdrawn and the hand lever lo8 is pivoted upwards in the direction indicated by the arrow. The ends articulated on the hand lever 1 0 8 the handlebars 109 are moved in the same way in the direction of the arrow so that the other ends of the handlebars 109 follow can move left in the view of FIG. In this position, the tension-exerting mechanism no longer exerts any force clockwise onto the pivotably mounted plate 102. Accordingly, the tension pulley 33 can be easily removed from the belt 30 may be removed, allowing the belt 30 to be removed from the abrasive disk 26 at the top of the grinding shaft. This movement of the tensioning mechanism requires that the joint between the eye bolt 114 and the pin at the end of the handlebar 109 is moved slightly upwards, which is the reason that the safety pin 124 is removed got to. Accordingly, it is in the case of the application of tension

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on the belt 30 a simple matter, the hand lever 108 after pull down to exert a clockwise force on the plate 102 that carries the tension roller 33. the Connection between the handlebars 109 and the hand lever 1θ8 is of the type that in the lowest position of the hand lever 1O8 according to FIG. 4, the force exerted below the pivot axis of the hand lever 1O8 runs on the holder 1θβ. Accordingly the hand lever 108 tries to remain in the position in which a tension is exerted. The security pin 124 is taken only as an extra precaution.

The tensioning roller 33 rotatable on its axis 100 can additionally be secured in their tension-exerting position. This is accomplished by a jam pin 130 which is secured by the Idler pulley 33 goes through and fits into a hole I3I that goes into suitable arrangement in the top wall 11 of the stand 10 is mounted.

From the above description, the operation of the releasable retaining mechanism for the container of the grinder is likely to be immediately apparent. Nevertheless, the steps are briefly summarized below. When the container is to be removed from its position in FIG. 1, the lifting fork arms 68 of a lifting fork vehicle are inserted into the openings 66 of the lifting attachment 58 which is attached to the middle part of the container 14. The ends of the lifting fork arms 68 grip the spring-loaded bolts 76 and force them upwards out of the way until the bolts 76 are aligned with the holes 73 in the ends of the lifting fork arms and fall down into the position shown in FIG. The countershaft housing 24 as the upper end of the stator K

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is then pivoted into the position shown in FIG. The tension pulley 33 disengages from the belt 30 pivoted by lifting the tension-releasing hand lever 108, as in Pig. 4 shown. It is then a simple one Thing, the ends of the belt 30 from the driven pulley 26 at the upper end of the rotor shaft 22. The hose conveying the sludge into the container 14 is separated by means of a suitable Sciinell separating coupling 19. Any other fluid or electrical connections to the container 14 in similarly can be quickly disconnected. For example, the container 14 is normally jacketed through which cooling water flows, so that a supply and a discharge hose for the cooling jacket is provided ", The simplicity for the sake of this, these hoses are not shown in Pig. Such additional connections are in the exemplary embodiment of FIG Fig. 9 shown for grinding under pressure.

The handles 50 on the supporting pegs 44 are now Retracted a little from the V-shaped supports 36 and the container 14 is free to be removed by means of the lift truck. For this it is necessary to use the container slightly to lift the V-shaped support posts 36 from the retaining elements 46 to get free on the supporting pin 44. The container 14 together with the rotor shaft 22 and the output disk 26 is then free to be moved as a unit and brought to a parking space by means of the lifting fork vehicle as shown in FIG. The entire described activity can be carried out in a few minutes by a relatively inexperienced operator.

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Since in some cases it may be necessary to attach connections or other components to the side I3 of the stand that faces the container 14, it is desirable to provide two stops 132 on the stand 10, which are spaced above the upper bearing pegs 44 lie, as in Flg. 5 is shown. These stops I32 limit the upward movement of the Tr-agsul tzen 36 _s wean, the container 14 is removed and thus ,, irerhinder-n damage any components on the stand 10th

Of course, if a container is to be reattached to the stand 10, the procedure is simply reversed. As mentioned above, the V-shaped notches 42 in the Tragstütaen 36 on the container 14 with the Haitee lementen 46 and the supporting pins on the stand 10 together, so that the container 14 can be quickly and safely installed in the correct position ©. The tapered surface 46a of the retainer 46 helps guide the support posts 36 into place. The driven pulley 2β can then simply run into its position and tension can be exerted on the belt 30 by the tensioning roller 33 due to the downward pivoting of the hand lever I08 on the quick-action mechanism 105. A rotation of the pegs 44 moves the holding elements 46 on the pegs 44 in the direction of the stand 10 in order to hold the support supports J> 6 securely in contact with the stand 10. Although the pins 44 are shown screwed into the stand 10 in the drawings, a number of systems for moving the support members could be used, including a cam mechanism which would take even less time to operate. After the various lines have been reconnected to the container 14, the device for grinding by means of sand is again ready for operation.

09846/0934

Pig. 7 shows a practical detail for a device for grinding by means of sand, which is not shown in FIGS is. The device shown in Fig. 7 has a slightly different appearance compared to the example of Fig. 1, but the features for the removable container are the same, which is why the same reference numerals are used in both cases. As shown, a door or cover 14o completely closes most of the back of the stand 10, on the opposite side to the container side. The upper part of the rear side below the intermediate gear housing 24 is left open for cooling air circulation for the rotor motor 17 to create. The cover I4o is conveniently attached to the stand 10 by suitable means such as Easily removable screws 142, fastened into angle strips 143 are screwed to the sides of the stand 10. Ladder rungs or steps 144 are attached directly to the lower part of the cover 14o. A handrail 146 is near the steps attached to the side of the stand 10 which is opposite the hinge for the gear housing 24. Sin the end of the handrail 146 connects to the top wall of the housing, the other end to the side wall near the top steps.

The steps 144 and handrail 146 allow a person to quickly, easily and safely reach the housing 24 and this to pivot into its open position. The hand lever lo8 for releasing the tensioning pulley is then accessible, as is the belt 30, so that the latter can easily be removed from the output disk 26. Most devices use sand to grind are 2 1/2 - 3 πι high. Therefore, in order to easily reach the output disk 26 and the upper end of the rotor shaft 22 the operator a considerable distance up and forward. The kicks 144 are an important part of the quick and safe container removal and installation option

609846/0934

ORIGINAL INSPECTED

The rotor motor I7 and the motor for the pump 16 generate im Operation considerable noise. Often the device is used in an environment in which other devices are used for grinding by means of sand and / or other equipment. It is important that the noise level be reduced as much as practicable will. In some cases there are mandatory regulations. Closing the back of the stand 10 contributes to contribute significantly to reducing the noise level. By attaching suitable sound absorbing material 150 to the inner wall With the cover I4o, the noise can be further reduced.

In the device shown in FIG. 9 for grinding by means of sand the same reference numerals are used as in Fig. 1-8, as far as similar components are shown. The unit in Fig.9 contains additional features of a controller and is similar to an actually implemented device.

The container 14 has a double wall which provides a cooling jacket 15 for the circulation of water or other suitable coolant which maintains the container 14 in an acceptable temperature range. A schematically indicated pressure switch 2βθ senses the pressure inside the cooling jacket I5. An end roof attendant senses whether the gear case 24 is open or closed. The pressure of the substance within the container 14 is detected by a suitable pressure switch 262 and a measuring device 263, which are shown schematically in FIG. The pressure exerted on the switch 262 and the measuring device 263 is preferably transmitted via a membrane and a suitable working medium in order to separate these parts from the grinding medium in the container 14. The temperature of the substance in the container 14 is also sensed by a suitable temperature-responsive switch 294 and a meter 295, both of which are indicated schematically.

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According to FIG. 10, the rotor shaft 22 is mounted for rotation in a roller bearing 168 which is fastened in the shaft housing 23. A second roller bearing, not shown, is arranged where the shaft housing 23 connects to the gear housing 24, and provides further support for the rotation and at the same time an axial support for the shaft 22. Below the roller bearing 168 at the point where the shaft 22 passes through the upper end of the container 14, there is a sealing assembly 169 on a sealing ring plate 170 attached to the upper end 17I of the container 14. A long sleeve 172 tightly encloses the shaft 22 and is secured for rotation with it by means of a set screw I73 . A flange I72a at the lower end of the sleeve I72 is located inside the container 14, the other part protruding from the container 14 through the sealing ring plate I70. A suitable fixed seal 174 is located between the sleeve 172 and the shaft 22 to prevent leakage along the shaft 22. A locking ring I75 made of Teflon or other similar material is connected by a pin 176 or other suitable means to the upper surface of the flange 172a at the lower end of the sleeve I72. The lock ring 175 slidably engages the lower surface of the seal ring plate 170 as the shaft 22 rotates. Within an upwardly extending shoulder of the sealing ring plate I70 is a stator ring 177 which carries an O-ring I78 in a groove on its outer wall, which O-ring I78 prevents leakage between the stator ring I77 and the sealing ring plate I70. The inner wall of the stator ring 177 has a small distance from the sleeve I72, which passes up through the stator ring 177 and the sealing ring plate 170. The stator ring I77 is made of a particularly hard material, such as tungsten carbide , and its upper surface is very well polished.

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With the top of the sealing ring plate I70 is an annular sealed housing I80 connected, attached to the upper end of a cover ring 182 with an L-shaped cross-section is. A stator ring 184 similar to the lower stator ring I77 is arranged within the cover ring 182 and has a O-ring in its outer surface in sealing engagement with the cover ring 182.

There is one between stator rings I77 and 184 Sealing unit consisting of a lower sealing ring I87 and an upper sealing ring 188, which is secured by a suitable spring I89 in Contact with the stator rings 177 and 184 are maintained. The sealing rings I87 and 188 are preferably made of carbon or other such material that can form a high pressure sliding seal. Each of the sealing rings I87 and 188 is on the sleeve I72 by means of elastomeric links 187a and 188a firmly attached, which sit on the inner wall of the sealing rings I87 and 188.

As can be seen from the drawings, the seal housing I80 is spaced from the shaft 22 and the sealing rings 187 and 188, so that an annular chamber 190 is formed. A liquid serving as a coolant, lubricant, and pressure medium is used to fill the chamber 190. The chosen one Liquid should be compatible with the material being ground in the container in the event that it penetrates the container. Mineral oil is for use as such a coolant lubricant suitable in connection with many dyes to be ground.

When the grinding device is in operation, the coolant and lubricant is pressurized to create a counter-pressure to the pressure inside of the grinding container. As explained above, it is

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It is desirable that many materials be processed in the milling device under a relatively high pressure, e.g., 3> 5 atmospheres. Preferably the high viscosity materials are those for which high pressure processing is desired. As the grinding media has a strong wear and tear in the container, a difficult sealing problem arises in high-pressure operation. That means, that the wear-causing material has a tendency under high pressure to rub a sealing element. By application a back pressure on the opposite side of the seal, this problem is greatly reduced. Therefore becomes a pressure which is about 1.5 atm higher than the pressure in the container in the chamber 190 generated.

When the device is in operation for grinding by means of sand, e.g. at a pressure of 3-3 * 5 atmospheres in its interior and when the grinding medium is moved by the rotation of the rotor shaft 22, the lock ring 175 makes a sliding seal with the lower surface of the seal ring plate I70. This seal does not prevent the leakage of liquid, but it is a barrier to the substances in it. These are therefore prevented from coming together with the sliding seal between the stator ring 177 and the sealing ring I87. There the locking ring I75 made of Teflon does not create a complete liquid barrier, the pressure in the container 14 is also on the Stator ring I77 exercised. However, the O-ring prevents I78 leakage between the stator ring I77 and the sealing ring plate 170. The sliding point of contact between the stator ring I77 and the sealing ring I87 is also the internal pressure in the tank exposed. The static seal between the elastomeric member 187a and the adjacent surface of the sleeve 172 prevents leakage along the sleeve. The spring-loaded

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Sealing ring 187 prevents leakage between it and the stator ring 177. As mentioned, the coolant and lubricant inside the chamber 190 is exposed to a higher pressure than the container pressure. Accordingly, there is no reason that the one in the container Material penetrates outside through the seal. The internal pressure of the container also contributes to the seal by making the sliding Keeps sealing ring I87 in firm contact with stator ring I77. Even if there is a slight leak into the container, this is usually not a problem as the one selected Cooling lubricant is compatible with the material processed in the container. The sealing ring 188 operates similarly to that Sealing ring I87 to prevent the coolant and lubricant from leaking from the upper end of the chamber 190. The elastomeric members 187a and 188a maintain their anti-leakage action in between of the shaft and the sealing rings I87 and 188 even if a small one due to the wear of the sealing rings I87 and I88 axial displacement takes place.

During operation of the grinding device it has been found that the temperature in the area of the counter pressure seal is undesirable can assume if only a high-pressure sealing chamber, on the other hand, no or only little cooling possibility is provided. While the seal can exist at a fairly high temperature, the life of the sealing elements is increased if one a relatively low one. Temperature. Accordingly, it is desirable that the coolant lubricant at a proportionate low temperature. The present invention provides a system for accomplishing this.

The following description refers to FIG. 11, as well as to FIGS. 9 and 10. A liquid line 19I is on an inlet opening I92 in the lower end of the seal housing 180 and to an outlet opening I93 in the upper end of the sealing

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housing 18O connected. In series with the line 191 lies a pump 194, a flow indicator 195, a pressure gauge 196, an electrical pressure switch 197, a sight glass 198, a Heat exchanger 199 and a filter 200. Some of these components are shown schematically as they are attached to the device of FIG but it should be understood that they will be placed wherever it is convenient and easy to access could be.

The pump 194 is driven by an air driven motor 202, which is connected to a compressed air line 2ö4 from the compressed air network or from another compressed air source 203 is supplied. A throttle valve 205 controls the amount of air supplied to the engine 202 »after passing through the Engine exits air at a suitable exhaust 206.

In the compressed air line 2o4 there is also an air pressure regulator 208 * which regulates the air pressure exerted on the sight glass I98, which acts against the coolant lubricant that is at the lower end of the Sight glass can be seen.

When the grinding device is to be put into operation by the rotation of the rotors and the pumping of the processing sludge is taken up by the container, the circulation system for the coolant lubricant is set in motion first. The air pressure from the compressed air source 203 to the line 204 and given to the motor 202, the pump 194 for the coolant lubricant drives. The speed of the pump 194 and consequently the circulation speed of the cooling lubricant is controlled by the throttle valve 205, which the engine 2o2 regulates the amount of air supplied. The pump I94 delivers the cooling lubricant through the lineI9I and in and out of the sealed Annular chamber I90 via an inlet opening 192 and an outlet opening 193. The air connected to the compressed air source 203

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Pressure regulator 208 ensures a constant predetermined pressure at the sight glass I98, from where the pressure in the coolant-lubricant line 3-91 is transmitted. Preferably is the one applied Pressure about 1.5 atm above the pressure of the product to be processed in container 14.

The interface between air and coolant-lubricant lies in the sight glass so that the operator of the device can see that there is sufficient coolant and lubricant in the line I9I is located. The rotating part 195a in the flow indicator 195 enables the operator to easily see if the Cooling lubricant is circulated.

The rotating sealing rings I87 and I88 made of carbon, the shown in Fig. 10 gradually become useful in use from, the filter 200 in the line for the coolant lubricant cleans the coolant and lubricant so that the small carbon particles the components cannot clog or act as an abrasive in the system. The flow indicator 195 allows the operator is also able to judge the appearance of the cooling lubricant.

The pressure gauge 196 allows the operator; easily through take a look to check that sufficient pressure has been received. Also generated when the operator is absent or is not paying enough attention, the electrical pressure switch 197 is an electrical signal to be described below.

As mentioned above, the coolant and lubricant, when enclosed in the annular chamber 190, tends to become undesirably heated. Simply by running the coolant and lubricant through the Urals through line 191, the min® temperature is already considerably reduced. In addition, the heat exchanger 199 with a KUhI

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■ water inlet 210 and a KUhlwasserauslaß 211 the cooling lubricant at the desired temperature. To increase the cooling capacity of the system, the pipe that carries the coolant-lubricant line 19I forms, be provided with outer cooling fins 213, as shown schematically in Pig. Il indicated are. In a similar way, the outside of the seal housing I80 (Fig.10) is provided with a plurality of outer cooling fins 181 provided.

The electrical control circuit according to FIG. 12 is connected to a three-phase power connection 230. The power connection is led to the Purapenmotor 7 and to the Rotormotor I7. the The voltage of the power connection 230 is reduced to 115 volts by an ordinary transformer 232. In parallel with the low voltage side of the transformer 232 there is a start-stop circuit branch 2 ^ 4 for the rotor motor I7, a warning lamp circuit branch 236 for the pump motor 7, a start-stop circuit branch 238 for the pump motor 7, warning circuit branches 240, 242 and for the cooling water or the product to be processed or the rotor seal, as well as one that is sensitive to the temperature Warning circuit branch 246.

In the start-stop circuit branch 234 for the rotor motor I7 there are in series the limit switches 248 for the countershaft housing, a stop switch 250, a short switch 252, a start switch 254 and a relay winding 17a for the rotor motor I7. The limit switch 248 remains closed, except when the gear housing 24 of FIG. 9 is open. This prevents the operating and maintenance personnel from working on the power transmission / when the engine is switched on . Occasionally it is desirable to use the

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To start rotor motor I7 immediately or to switch it on for a short time. Pressing the short on switch 252 does this because the short-circuit switch 252 is instantly reopened if it is not pressed any further. Becomes the short circuit breaker depressed, a parallel current path is through line 253 closed to bypass the normal start switch 254, the is normally open, as shown in FIG.

If the engine is to be started for continuous operation, it is only necessary to press the start switch 254 to energize the relay coil 17a. This in turn closes the normally open contacts 256 which control the application of power to the motor 17. The motor relay winding 17a also closes the relay contact 255 , which is parallel to the start switch 2 $ 4. This branch remains energized even after the start switch 254 is released. Of course, pressing the stop switch 250 de-energizes the relay winding 17a, so that the relay contact 255 and ^the motor relay contacts 256 are opened instantaneously. The start-stop branch 238 for the pump motor 7 contains the following elements connected in series: The normally closed pressure switch 2βθ, which responds to the pressure of the water in the cooling jacket Ϊ5, a normally closed pressure switch 262, which responds to the pressure of the product to be processed in the container 14 responds, a normally open pressure switch 197, which responds to the pressure in the coolant-lubricant system for the shaft seal, a stop switch 264, a start switch 266 and a relay winding 7a for the pump motor 7. The relay winding 7a closes when energized, contacts 268 for the motor

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and the relay contact 270, which is parallel to the start switch lies. The relay winding 7a also opens the contact 269.

In the warning circuit branch 240 there is a switch 272 which is open when the pressure switch 260 for the cooling water pressure is closed and is closed when the pressure switch 260 is open. The switch 272 is in series with an ⁸ keep relay coil 274 and © INEP suitable lamp 276. The holding relay winding 274 actuates the normally open contact 278, which lies parallel to the switch ¹ 272 _β A normal ¹ x = as closed Rüekstellschalfeeg ³²⁷⁹ is in height with contact 278.

In the warning Schaltungszwelg 242 door the product zn processing is normally open © Sehalter _280a AEEI? deal with the? Pressure switch 262 for the 2U processing © product moved. A hold relay weight 281 and lamp 202 are placed in series with the normally open switch 28o. The holding relay-like 281! © hold the no ^ m ^ len-jelBe open relay contact 284, the parallel 2! To switch 280 llegfe ₀ The normally closed reset switchx ³ 285 is in series with the contact 284 »

Ber warning circuit branch 244 for d®n pressure within the seal includes a normally closed switch 286 which is actuated together with the Druekeelialter 1 97 by the pressure in the seal. A holding relay weighing 288 is in series with the switch 286 and a lamp 290. The holding relay winding 288 switches the normally open contact

292, which lies parallel to the holder 286. A reset switch

293 is in series with contact 292.

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When the connection to the power connection 230 is first made to operate the grinder, the lamp is energized since the contact 269 is normally closed. This lamp 27I is visible on the outer side of the grinding apparatus at any suitable location and indicates to the operator that the pump motor is not ³ 7 unt®r stream.

Likewise, the lamp is set 290? Jater Ström, since the switch 286 is normally closed ISFE. The © benfalls at a suitable point asa the outside of the grinding apparatus arranged bulb are UGP operator at _a that sufficient pressure within the sealed annular chamber I90 of "lg" 10 consists. The pressure switch I97 shown in FIGS. II and 12 senses the state of insufficient pressure . is therefore in its normally open position shown in Fig. 12. Consequently, the pump motor 7 to start nlefot = Therefore, the first SeiiL'-itt is to Betriebsaufaahme, the system naeheleiii to the force strcraansQhluö 230 placed lsfe _fl the application of air pressure from the Broskluftquelle 203 öer PIg = He This places the coolant lubricant in the line ISO under a pressure which is determined by the air soot regulator 208. Upon application of such pressure to the sealed annular chamber 190, the pressure switch 197 moves to the closed position and the associated switch 286 moves to its open position. After opening the reset switch 293, the lamp 290 is switched off, which indicates that there is sufficient pressure in the sealed annular chamber 190.

To start the rotor motor I7, it is only necessary to press the start switch 254, which energizes the motor relay winding 17a. This in turn closes the contacts 256 for connecting the motor IJ as

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the engine begins to run, but at the same time the relay contact 255 was closed, so that the start switch 254 can be released. The above description assumes, of course, that the transmission housing 24 is closed, so that the limit switch 248 is also closed.

To put the Purapen motor 7 into operation, the start switch 266 is closed. This energizes the motor relay winding 7a which closes the normally open contacts 268 for the motor 7, thereby supplying the motor 7 with power. The relay winding 7a also closes the relay contact 270, which is parallel to the start switch 266, so that the latter can be released. In addition, the motor relay winding 7a opens the contact 269 and thus switches off the lamp 271. The grinder is now in operation and will be maintained unless either the stop switches 250 and 264 for the motors are actuated or if one of the operating pressure parameters that are being sensed does not go outside their predetermined range. The pressure switch 26o for the cooling jacket I5 responds to overpressure in the cooling water. The cooling water is normally under the pressure in the public pipeline network, which can be in the range from 3.5 to 6.5 atmospheres. If for any reason the pressure should become abnormally high, which could result in leakage in the area of the cooling jacket 15, the pressure switch 26c would open and initiate three actions. The pump rotor 7 would stop, the contact 269 would close and energize the lamp 271, which indicates that the pump motor 7 has stopped. Switch 272, moving along with pressure switch 260, would close and turn on lamp 276, indicating that the water pressure is too high. Contact 278 would also be closed , thereby ensuring that lamp 276 remains on even if the water pressure drops again. In this way

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the operator or maintenance man knows immediately when he appears, from lamps 271 and 276 that the pump motor 7 is not running and that the water pressure was too high. If the water pressure has since decreased or the malfunction has been corrected the pump motor 7 can again by pressing the start button to be started. Pressing the reset switch 279 turns the lamp 276 off. If desired, the Pressure switch 260 also uses a negative pressure instead of an overpressure, similar to the pressure switch I97 for the seal pressure, feel. Notwithstanding this, the vacuum switch could also be added and the overpressure switch retained in the system,

When the pressure of the product to be processed inside the container 14 exceeds a certain pressure, the pressure switch 262 is opened, whereby the pump motor 7 is switched off and the lamp 27I is switched on. Simultaneously, the switch 280 is closed to energize the lamp 282, which gives a warning regarding the product to be processed. After the pump motor 7 has been switched off, the pressure in the container will immediately drop so that the pressure switch 262 responsive to the pressure will again be closed and the normally open switch 280 will be open. In contrast, the lamp 282 will continue to be energized because the hold relay winding 281 holds the contact 284 closed. In this way, the operator learns that the temperature of the product was too high. The pump 7 also remains without power until the start switch is pressed again. The system could be turned on immediately, but of course, if the problem causing the pressure increase was not resolved , the pressure switch 262 would immediately turn the engine off again.

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As already stated above, the pressure switch 197 responding to the diofatation pressure must be closed before the Purapen motor 7 could be started for the first time. If the pressure should drop below a certain value, the pressure switch 197 would open again and the motor 7 would switch off - and the lamp 271 would switch on. Opening the pressure switch 197 simultaneously closes the associated switch © 286 _s a @ r the lamp 290 for monitoring the sealing pressure uafeer Strosa sefest. The hold relay winding 286 keeps the lamp 2po on even when the sealing magnet / paete rises. In this way the Eedienimgs- © d @ r Uarfcragsperson learns upon your arrival that the Diefotungsüfeack was too low. As soon as the pressure of the seal © feer & aXb is a correct minimum value, did you get a return? 293 2Ui ³ Switching off the lamp 290 g @ Offe © t weE »dea _o The Puaipenmotor 7 can of course be set again, which again« switches the lamp 2Jl off «

Because of the possible serious consequences of an au high temperature for the processing © Ei'geiagnig, © s is desirable - to take further safety measures on the device for grinding with sand @ in @ - This is how the temperature sensitive switch 294 feels the temperature of the product directly and wix ° d closed if the condition of a too high temperature exists, whereby an acoustic signal device 296 is switched on. In this way, the operator is made aware of this dangerous situation. The warning circuit branch 246 for the temperature is not set up to stop the pump motor 7, since it is normally desired that the pump should continue to operate. Sim condition of too high a temperature would normally become ^ s ^ sentoft when the influx cools down

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kn-mi-15

Product mm container © !? would be interrupted. A condition of too high a temperature ¹ passes © ctesli caused a number of Paktoren of which d @ r most obvious being that the cooling water is too slow duroh flows through the cooling jacket, or an excessively high temperature has "1ά this era context a" la Durchf lußmeeses ¹ in the ICtfiilx-jasserleitimg switched on so that an EeöieanmgspSiigSÄ © iae sees it intimately

mi ^: # 3g cooling water e

The ICossfeinatiöa ilesei? versehi © a © asEi Dra @ k = and

for the G- ^ E ⁸ St gisi Kafeisn S5itt @ ls Ssuad brings © iiis ¥ © rteil tw? Si © giQteE ³ ® iaad ^ © relaBliche B <3trl @ bs = and contribute snn = lisispaiRMg ^ © su Wartusaggg ^ lt, for the dal a ©

6098A6 / 0934

Claims (23)

- 35 - kn-mi-15 PATENT CLAIMS Industrial device for grinding particles in liquids, consisting of an upright stand j an upright container on the side of the stand to hold a grinding medium and that in the flow through the container to be processed liquid, a liquid inlet and outlet on the container, one detachable with the inlet connected pump for pumping the liquid through the container, a rotor in the container, around the grinding Medium and liquid to move, and a motor on the stand, from which a drive connection to the rotor consists, characterized in that the Drive connection between the motor and rotor is designed as a quickly releasable connection and that the side of the Stand and on the side of the container a suspension attachment for the container is provided on the stand, so that the Container is easily removable from the stand after the fluid connections and the drive connection to the rotor are separated. 2. Apparatus according to claim I _9, characterized by a shaft connected to the rotor and protruding from one end of the container, on which a driven element is attached outside the container, a transmission means driven by the motor and connected to the driven element for rotating the rotor shaft and a quick disconnect device between the transmission means and the output element, so that the rotor shaft and the output element are detachable from the stand as a unit with the container. 609846/0934 - 36 - kn-mi-15 3. Apparatus according to claim 2, characterized in that the output element is attached to the shaft The output pulley is that the transmission means is a belt and that the quick disconnect device is on the stand attached adjustable tension pulley mechanism is. 4. Apparatus according to claim 3, characterized in that that the tension pulley mechanism consists of a supporting plate pivotably attached to the upper wall of the stand, one idler pulley rotatably attached to the supporting plate and in alignment with the belt and one on the upper wall of the stand and attached to the supporting plate means for pivoting the plate in the Way that the tensioner pulley moves to apply tension to the belt or to release that tension in the belt will exist. 5. Apparatus according to claim 4, characterized in that the means for pivoting the plate from one there is a mechanism that can be actuated by a single pivotably attached hand lever for pivoting the plate. 6. Apparatus according to one of claims 2, 3, 4 or 5, characterized in that the quick disconnect device for the drive connection is arranged at the upper end of the stand and that the stand is provided with steps through which the quick disconnect device can be easily reached by an operator is. 7. Apparatus according to claim 6, characterized in that one of the side facing away from the container of the stand final cover that carries the steps. 609846/093 - 37 - kn-mi-15 8. Apparatus according to claim 1, characterized in that the suspension for the container consists of a plurality of V-shaped There are supports on the one hand and a plurality of load-bearing pegs on the other hand, which are attached to the stand or to the container or are attached to the container or stand, the Support brackets and the tenons to hold the container on the stand work together. 9. Apparatus according to claim 8, characterized in that that are at a distance from the component that carries the pin, holding elements on the pin, the spaces for Limit the uptake of the supports. 10. Apparatus according to claim 9 »characterized in that the holding elements on the pin have a tapering Have surface that the support supports and the component carrying the pegs in the direction of mutual contact push. 11. Apparatus according to claim 1, marked, by a device on the container that cooperates with lifting means to remove the container from the stand is trained. 12. Apparatus according to claim 1, characterized in that a lifting lug on opposite sides of the container is attached, which is designed to accommodate the lifting fork arms of a lifting fork vehicle and the lifting of the Container allowed by the lifting truck and the removal from the stand in this way. 13- device according to claim 11, characterized in et, that on the container a locking mechanism ν aur locking <i © r Lifting fork arms with the container during the movement operation on, is provided. 609846/0934 - 38 - kn-mi-19 14. Apparatus according to claim 12, characterized by spring-loaded latch on the lifting attachment, so that a latch in the end of each lifting fork arm can be inserted to securely lock the lifting device on the container when it moves will. 15. Apparatus according to claim 14, characterized in that the ends of the bolts are beveled so that they are pushed into the inoperative position by the lifting fork arms when they are moved perpendicular to the bars and can automatically fall into the holes in the lifting fork arms when the holes are flush with the latches. 16. Device in particular according to claim 1, characterized: .ζ eichn et , and ^: a warning device connected to the sensors, which is activated if any of the filled parameters are outside their predetermined range. 17. Apparatus according to claim 16, characterized by a cooling jacket for the container and a device for Passing coolant under pressure through the cooling jacket, one of the sensed parameters being the pressure of the coolant is. 18. Apparatus according to claim 16, characterized by a shaft connected to the rotor and extending at one end extends from the container, a seal in the area in which the shaft extends from the container, a the J / seal surrounding closed chamber and device 609846/0934 - 39 - kn-ml-15 to generate pressure of a liquid in the chamber, which is higher than the pressure in the container, so that the Seal is kept closed, one of the sensed parameters being the fluid pressure is in the closed seal chamber. 19. Apparatus according to claim 18, characterized in that that the sensor for the pressure generated in the sealing chamber is connected to the pump in such a way that the pump is not can be operated when the pressure in the chamber is not above a certain minimum pressure. 20. Apparatus according to claim 16, characterized in that that the warning device is a lamp, the switched-on state of which reveals the origin of the parameter outside of its own predetermined range. 21. Apparatus according to claim 20, characterized by a holding device for holding the lamp switched on State even if the sensed parameter was only temporarily out of range, which means that the Parameter remains recognizable, which led to the stop of the motor. 22. Apparatus according to claim 16, characterized in that that the warning means display means for the nature of the parameter sensed and out of range and for the stopped state of the pump. 23. Device according to one of claims 16, I7, 18, 19, 20, 21 or 22, characterized by a sensor for the temperature in the container and an acoustic signaling device that comes into action when this temperature is reached is outside a predetermined range. 609846/0934 Blank page