DE1070475B - - Google Patents

Description

Federal Republic of Germany

GERMAN

PATENT OFFICE

PATENT LETTER 1 070

registration date:

Notice the registration and output of the Interpretation:

issue of the patent specification:

DBF 1U7U475 kl. 50 c 13/10

internat. kl. B02d 2nd year 1956

December 3, 1959 May 19, 1960

agrees with the exposition

1 070 475 (b 38568 iii / 50 e)

15th

The invention relates to a hydraulically operated scraper device for roller mills, in particular for those for grinding pasty ground material, consisting of a doctor blade and one on the roller frame stand there is a swiveling knife holder, which is in the direction of the main knife plane (cutting direction) is movable.

It is with roller mills and rolling mills, which are used to grind pasty rolling stock, It is common practice to scrape the ground grist from a roller with a knife and then put it in a collecting container to direct. With the usual scrapers, which are attached with pressure spindles and lever devices If the rollers are pressed, it can very easily happen that the doctor blade is pressed too hard and is then subjected to unacceptable wear and tear. Changes as a result of knife wear also the acceptance angle during operation.

A hydraulic pressure device is already known for friction bars of roller graters - a » become. The friction bar is opened vertically by hydraulically actuated pistons with adjustable pressure pressed the roller surface. Signs of wear and tear do not cause any change in the angular position here the friction bar ..

A mechanical stripping device is also known in which the knife holder is pivotable on the roller frame stand is arranged. When the knife is readjusted, its angle of attack is also adjusted changed, whereby a time-consuming readjustment is always necessary.

The invention, by which these disadvantages are eliminated, consists in that the knife holder bushes in bearing ¹ , which are pivotably arranged by means of pins on the roller mill stand, is guided displaceably parallel to their pivot planes.

This is achieved in a simple manner; that the angle of incidence of the knife is independent of the knife wear is, and the knife holder automatically adjusts itself so that its axis is parallel to the roller axis lies.

In the drawing, two preferred embodiments of the invention are shown, namely shows

Fig. 1 is a side elevation along the line BB in Fig. 2,

Fig. 2 shows a cross section through one side of the stripping device according to the section line AA in Fig. 1 and

3 shows a plan view of a stripping device according to the invention; in
. Fig. 4 is a second and in the

FIGS. 5 and 6 show a third embodiment corresponding to a part of FIG. 1.

The knife holder a with the scraper b is a hydraulically operated scraper device for roller mills

Patented for:

Bühler Brothers, Uzwil (Switzerland)

Claimed priority: Switzerland from January 28, 1955

35

30th

35

40

45

50 Ernst Bosshard ₁ Steinacker, Uzwil (Switzerland), has been named as the inventor

slidably arranged in the two bearing bushes e and is pressed against the roller h by the pressure pistons c, which are located in the cylinders d. The pressure fluid is pressed from the reservoir y through the suction line ζ into the cylinder d with the aid of the pump k driven by the motor / motor, the pressure being kept constant by the pump k driven at constant speed. It can be set to the desired value with the pressure reducing valve i.

The bearing bushes e are pivotably mounted on the journals f , which in turn are attached to the stand m of the roller frame. The desired position of the bearing bushes e is set and fixed with the aid of the screws g , "which engage in curved recesses in the plates χ firmly connected to the bearing bushes e . In this way, the bearing bushes e are secured against rotation. On the other hand, the angle of incidence of the knife b can be changed over a wide range on the roller h , and the screws g are temporarily loosened to adjust the angle.

When cleaning the machine and replacing the knife b , the reversing valve t is set to the "release" position so that the pressure in the cylinder d drops to zero, the screws g are loosened and the knife holder a with the two bearing bushes e turned so far, that it can be pulled straight up out of the bearing bushes. Since the setting of the reducing valve »remains unchanged while the knife holder.a is being lifted out, and since the speed of the pump k is also maintained, the pressure is

009 51Ϊ / 267

Claims (6)

after reinserting the knife holder and setting the reversing valve ί to the »pressing« position, exactly the same as before lifting it out. This reproducibility of the pressure is of particular advantage in roller mills for grinding pasty masses. The pressure fluid is distributed in the two cylinders d through the tube η and the hoses o. The knife holder a adjusts itself automatically so that its axis p is parallel to the roller axis q. To retract the knife holder when setting the reversing valve to the "release" position, that is, when the hydraulic pressure drops, return springs s are arranged in cylinders d. In the embodiment according to FIG. 4, the cylinders rf 'are designed to be double-acting, and the pressure fluid can be controlled both behind and in front of the piston r, so that the retraction of the cutter bar is also accomplished hydraulically. A further embodiment is shown in FIGS. 5 and 6, in which ν are provided in the bearing journals / pressure chambers, which are connected to the pressure source k through the bearing journals / '. This embodiment has the advantage that the pressure medium supply system can be arranged rigidly. The bearing bushes e with the pressure chambers / and the pressure piston c can be turned into any position and fixed with the help of the nuts w sitting on the bearing journals / '. The plates x ″, in which there are guides for the cutter bar a, can be rotatably arranged on the bearing bushes e and adjusted over a wide range of angles and fixed with the aid of the screws for the stand. Patent to s pr Cr. n t: 3Y 1. Hydraulically operated scraper for roller mills, especially for those for Trituration of pasty grinding rod, which consists of a doctor blade and a roller mill There is a pivotable knife holder in the stand, which is displaceable in the direction of the main knife plane (step direction), characterized in that the knife holder (a) is parallel in bearing bushes (e) which are pivotably arranged on the roller frame stand (w) by means of pins (J) is guided displaceably to their pivot planes. 2. Stripping device according to claim 1, characterized in that the pivotable bearing bushes (e) are firmly connected to lateral bearing plates (x) and can be fixed in the desired position by screws (g). 3. Stripping device according to claims 1 and 2, characterized in that on the bearing bushes (e) hydraulic cylinders (d) for pressing the scraper (b) on the roller (h) of the roller frame are available. 4. Stripping device according to Claims 1 to 3, characterized in that return springs (s) counteracting the hydraulic pressure medium are provided in the hydraulic cylinders (d). 5. Stripping device according to claim 1, characterized in that hydraulic pressure chambers (v) are provided in the bearing bushes (e) which are connected to a pressure source (k) by the bearing journals (/ "') firmly connected to the bearing bushes, wherein the knife holder (a) is guided displaceably in the lateral bearing plates (x ') . 6. Stripping device according to claim 5, characterized in that the bearing plates (x ') are pivotably arranged on the bearing bushes (e). Considered publications:
British Patent No. 421 173;
U.S. Patent Nos. 2,610,801, 1,725,715. 1 sheet of drawings O 909 «7/231 11.59 (009 5137267 5.60)