FI95057B - The diversion device - Google Patents

Description

95057

REMOVAL DEVICE

The present invention relates to a removal device belonging to a container, in particular for removing pulp from a bleaching tower used in the pulp industry, in which a rotating arm with transport wings is arranged in the bottom area of a container with a central removal.

Tanks with a central discharge at the bottom and a rotating transport arm are already known; the problem is the use of these conveying arms, which must, on the one hand, take place on the shaft of the container, but on the other hand the intermediate drive can severely interfere with the removal of the substance, depending on the substance to be removed.

To solve this problem, it is proposed according to the invention to provide a central discharge pipe which at the same time uses a transport arm, so that the discharge pipe has an arbitrary cross-section and can take care of the transport of the substance itself, as it rotates, which may have transport ribs.

The removal device according to the invention is characterized in that:; that the arm is formed in several parts, whereby substantially. · · Ti in addition to the first part wiping the entire tank bottom, a perpendicular, shorter, second part is provided, in both parts of which the transport wings, in particular curved transport wings, are arranged, the first part known per se provided with a rotating outlet passing through the tank bottom, in particular an outlet pipe.

An embodiment of the invention is characterized in that the transport vanes are arranged at different radial distances so that the effluent conveyed from one wing to the central outlet is conveyed in each case by the next wing located in the region of said part opposite the diametrically opposite wing. .

Another embodiment of the invention is characterized in that the rotating exhaust pipe is connected to a gear-driven gear ring for rotating the exhaust pipe and the arm.

Yet another embodiment of the invention is characterized in that the toothed ring is supported by a spherical ring.

Yet another embodiment of the invention is characterized in that the ring gear has an axially symmetrical gear drive, in particular via two diametrically opposed gears.

Yet another embodiment of the invention is characterized in that the part of the outlet pipe "located inside the container is preferably formed by two mutually diametrically opposed supports which support the arm holder.

Another embodiment of the invention is characterized by. the fact that the arm supports a buffer extending axially from the • container, which prevents the substance to be removed from falling directly into the discharge pipe.

Yet another embodiment of the invention is characterized in that the free inner tube of the outlet pipe is provided with extending conveyor ribs, which are preferably arranged at an angle to the radial direction and extend downwards over the end of the outlet pipe.

In the following, the invention will be explained in more detail with reference to the accompanying drawings, in which

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3,95057

Fig. 1 shows a vertical section along the line A-A in Fig. 3 of a tank bottom provided with a discharge device.

Fig. 2 shows a section along the line B-B in Fig. 1.

Fig. 3 shows a device according to the kuv.1 viewed from the arrow X direction.

Figure 1 is shown on a larger scale than Figures 2 and 3.

In the container 1 with the conical base 2, a transport arm 3 is arranged in the region of the base, which is cross-shaped, so that the arms perpendicular to each other are of different lengths.

The arms support the opening wings, so that the wings on the longer arm wipe the circumferential area of the tank bottom and the wings on the shorter arm wipe the middle area.

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Further, the arrangement is such that the substance carried by the forward wing is conveyed further by the next wing, which is located diametrically opposite the transport wing 3 at the transport arm 3; in Fig. 3, the wings 4-10 are marked in the order of transport; it is further observed that the length and setting angle of the transport wings decrease as they go from the circumference to the center. The transport arm 3 supports in its central part a buffer 11 in the form of a pyramid directed towards the container 1 on a square base, the purpose of which is to provide a lateral pivot in the material to be transported over the end of the transport arm 3.

At points 12, the transport arm 3 is screwed to a step 13 which passes two narrow, upwardly extending extensions 14, 15 of the outlet pipe 16, 19, which outlet pipe extends axially downwards through the tank bottom 2. In the area below the tank bottom 2, there are no deviations in the outlet pipe 16, 19. As a result, the transport vanes 9 and 10 can transport the material to be removed to the discharge pipe 16 # 19 without hindrance, because the pipe wall inside the tank 1 is not made through. However, after passing through the tank bottom, the pipe wall is closed to the lower end of the outlet pipe.

Arranged inside the outlet pipe 16, 19 are two axial conveying ribs 17, 18 which extend above the lower end of the outlet pipe.

The lower end of the discharge pipe 16, 19 consists of a downcomer 19 with annular grooves extending up to the tank, not shown in more detail, for receiving the tank bottom and further supporting an annular plate 20 parallel to the plane of rotation of the transport arm 3, with a ring hereinafter referred to as a toothed ring 21, and provided with a spherical inner ring bearing 22 supported on the inside of the toothed ring 21 on the one hand and on the outside of a ring 23 screwed into the base 24 on the outside. This means that the transport arm 3 / step 13 , 15 / outlet pipe 16, 19 / ring plate 20 / ring gear 21 is rotatably mounted on the foundation. As can be seen from Figures 2 and 3, the container 1 is itself supported by four supports 25, the base 24 is - but need not be - anchored to these supports 25 and has a coaxial pressure gap 26 below the outlet pipe 16 into which the outlet pipe 16, 19 conveyor ribs 17, 18 extend.

An arbitrary collection device for the substance to be removed, e.g. a conveyor belt, can be arranged below the pressure shaft 26.

To operate the exhaust device, two diametrically opposed power-coupled devices are provided in the foundation 24.

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5,95057 motors 27, the gears 28 of which likewise contact each other opposite the toothed ring 21.

The construction according to the invention thus provides a central discharge system for tanks / with heavily loaded bearings, as well as for use on the transport arm with a completely unobstructed central discharge, in the passage of which structures can be easily arranged for conveying the substance to be removed.

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Claims (8)

1. A dispensing device belonging to a tank (1), in particular for removing stock from the bleaching tower used in the cellulose industry, wherein a rotating arm (3) provided with drive wings (4 ... 10) is provided in the bottom zone (2) of the tank, which has a center drain, characterized in that the arm (3) is formed of several parts, with the addition of the first part which essentially sweeps over the entire bottom of the tank (2) one towards this perpendicular and shorter second part, at which both parts the drive wings (4 ... 10), which have a particularly curved shape, are arranged, the wings of the first part being arranged so that they drive the maid within reach of the wings of the second part, and that the arm (3) is known per se method is provided with a bottom, rotating outlet, in particular a drain pipe (16). 2. Device according to claim 1, characterized in that the drive vanes (4 ... 10) are arranged at different radial distances, so that the part of the driven material which is fastened to the center drain of a wing fixed to one arm further by the following wing, which is attached to a diametrically on the other side. part of the arm located on the arm suspension. Device according to claim 1 or 2, characterized in that the rotating drain pipe (16) is connected to a gear driven gear ring (21) which drives around the drain pipe and the arm (3). . Device according to claim 3, characterized in. by supporting the gear ring (21) via a ball ring (22). Device according to Claim 3 or 4, characterized in that the gear ring (21) is provided with an axially symmetrical gear drive, in particular comprising two diametrically opposed gears (28). Apparatus according to any one of claims 1 to 5, characterized in that the part of the drain pipe (16) located within the tank (1) preferably consists of two diametrically opposite supports which support the holder of the arm (3). Device according to any one of claims 1 to 6, characterized in that the arm (3) bears a buffer (11) projecting in the tank which prevents the expelled substance from falling directly into the drain pipe (16). . Apparatus according to any one of claims 1 to 7, characterized in that the free inner tubes (16) of the drain pipe (16) are provided with drive chambers (17, 18) which are preferably arranged at a right angle in the pipe. relative to the radius and extending downwards past the orifice of the drain pipe (16). • · €% m • F