DE1905290A1 - Rotary transmission for treatment of abra - sive materials - Google Patents

Abstract

Rotary transmission takes place between a rotating hollow shaft and a rotating pipe or shaft which extends through the hollow shaft to a rotary container. The hollow shaft is secured to the container and is joined to a static vapour pipe over a packing box and its bearing. The vapour pipe is sealed against the rotating pipe by a packing box. To protect the vapour pipe packing boxes and bearings from abrasive material is layered filter is arranged between the rotating shafts.

Description

Rotary feedthrough on rotating containers The invention relates to on a rotating union between one on a rotating container for processing of items containing friction sensitive and / or abrasive substances attached rotating Hollow shaft, on the outer circumference of a stuffing box and a stuffing box bearing a stationary vapor pipe is connected, and one concentrically through the Hollow shaft extending through into the container and also rotating with it Pipe, shaft or the like. That by means of a stuffing box against the stationary vapor pipe is sealed.

There are already movable seals between one or more concentrically nested tubes and a rotating container, e.g. Drum mixers, tumble dryers, etc., which are filled with a solid material and at into which gases or vapors are blown in through an external, stationary vapor pipe or principally to be sucked out, while a middle concentric in the outer Pipe arranged pipe sum is used to suction liquid from the container, known.

This can be done by a further spray gate arranged inside the pipes liquid or gaseous or powdery treatment substances when the container is rotating be sprayed.

The previously known devices allow the above Processes, but cannot be used for abrasion- and use heat-sensitive, flammable or explosive contents of the container, d the fine, dusty components in the sealing and Storage locations and can heat them up inadmissibly or even destroy them here due to friction.

The invention overcomes the existing difficulties in that to protect the stuffing boxes and the stuffing box bearing of the stationary vapor pipe before the penetration of friction-sensitive and / or abrasive solid substances from the inside of the container between the rotating shafts a sealed against these by means of stationary seals Filter is delegated.

The filter provided according to the invention thus protects the stuffing boxes and the gland bearing prior to penetration of those present in the rotating vessel materials to be processed. Get to the endangered bearing points and sealing points the gases, vapors or liquids from the inside of the reel are only in filtered form.

To avoid unnecessary loading of the filter with the The contents of the container, e.g. granules, are expediently in the area between Filter and container are also provided with a sieve rotating with the hollow shaft.

The circumferential filter can, for example, be tubular, so that a more or less large filter surface depending on the chosen length of the pipe is available. It is advantageous to arrange the filter interchangeably. as Filters are, for example, candle filters made of sintered metal or ceramic. However, filters with a cloth cover are also suitable.

Depending on the type of treatment process to be carried out in the rotating container it is necessary to have further supply and / or discharge lines in the interior of the container to introduce.

The invention can be particularly advantageous for a rotating Use a container with the inside of the tube that rotates with the hollow shaft a stationary spray tube is arranged, which is used for supplying e.g. impregnating agents can serve in the container. A common bearing of the rotating pipe and of the stationary pipe located inside is in the rotating container arranged in the free space above the product. This is the only one opposite Storage point exposed to the product is, however, kept small in the sense of the invention, thus has a low peripheral speed. It is by means of axial sealing rings sealed on both sides and, if necessary, can additionally by means of a barrier medium lubricated and / or cooled. The barrier medium is expediently by means of another stationary, concentrically guided inside the spray tube Feed pipe passed into the camp. A second designed as a rotary feedthrough Bearing for the tube rotating inside the hollow shaft and the stationary ones guided in it The spray or line pipe is outside the vapor pipe connected to the hollow shaft intended.

By placing a filter between the seal of the outer Vapor pipe and the opening of the container and the arrangement of the bearing parts of the Pipes leading into the interior of the container are in the free space above the filling material this against the penetration of stanmenden from the filling material, the sealing and bearing points Inadmissibly warming or destructive substances are protected. This will continue for the first time the implementation of various treatment processes such as drying, washing, Extraction, impregnation, etc. of a friction-sensitive and / or abrasive or expiosible Substance in a single rotating container in optional Sequence in a safe way possible.

The invention is shown in the drawing in an exemplary embodiment and is explained in more detail below on the basis of this.

The figure shows a cross section through a system with a rotating Container and a multiple rotary leadthrough, the treatment drum 1 is on one side is attached to a hollow shaft 2 which runs in the bearing 3. On their The stuffing box 4 and the stuffing box bearing 5 are located on the outer circumference the common sleeve 6 of which the stationary vapor pipe 14 is attached.

2 The rotating shaft runs through the inside of the hollow shaft Suction pipe 7. Seated between these two pipes, through stationary seals 8 and 9 sealed, the filter 10, e.g. as a candle filter made of sintered metal, ceramic or executed with cloth covering.

This filter is acted upon from the outer annular space 11. At the endangered stuffing boxes 4 and 12 can only be filtered through the inner annular space 13 Gases, vapors or liquids get in, which flow off through the vapor pipe 14.

The circumferential hollow shaft 2 and the likewise circumferential suction pipe 7 are also connected to one another by a sieve 15 to avoid unnecessary exposure of the filter 10 with the mixed material, e.g. grave debris.

Inside the rotating suction pipe 7 is the stationary one Spray tube 16 introduced, which is in the branch, socket 17 in a suitable warehouse 18, e.g. made of self-lubricating bronze or plastic, runs along on both sides the sealing rings 19 is protected from the ingress of foreign matter. On his At the end, the spray tube carries a suitable spray device 20.

From the branch socket 17 a kinked suction pipe 21 goes to the deepest point of the treatment drum, which is designed, for example, as a groove bottom is.

A thin pipe continues through the interior of the spray tube 16 22, through the -a barrier medium, e.g. inert gas or a lubricating liquid, is fed.

The suction tube 7 and the spray tube 16 are outside the apparatus led out through the stuffing box 12 and a rotary leadthrough 23.

The inventive design of the implementation thus has the effect that no feed material or its dust-like abrasion to one of the possibly even vacuum-tight Stuffing boxes or bearing stelil can get. The only exposed depository 18 is kept very small and therefore has a low peripheral speed and is in addition, the sealing ring is sealed, which is not impaired by the feed material Barrier medium are additionally lubricated and / or cooled.

This system works as follows, for example: The one to be treated Good, e.g. explosive granules, are filled into the drum 1 and e.g. with water washed with the drum rotating. Granules or abrasion cannot get into the darning * with get socket, as they are retained by the screen 15 and the filter 10 will.

After the end of the wash, the water is drawn off through a suction filter. That Good is then also dried in a vacuum with the drum 1 rotating. the Vapors are drawn through the sieve 15 into the hollow shaft 2 and have to pass through the Filter 10 before they get to the vacuum pump. In this way is also the Eliminates the risk that fine debris will be sucked in towards the end of the drying process and causes fire or explosion at rubbing points on downstream equipment.

After drying, the granulate has to be impregnated, for example will. For supplying the liquid, gaseous or powdery impregnating agent serves the tube 16 with a nozzle 20. The surface of the goods increases as a result of Rotation of the drum a certain inclination to which the nozzle is aligned must be in order to apply all granulate particles as evenly as possible. this is only secured if the nozzle is stationary while the drum is moving.

The safe handling of friction-sensitive and / or explosive substances in a single rotating apparatus is by using the invention Measures with a multiple implementation guaranteed with certainty.

Claims (6)

I claims between between between one on one rotating Bezur for processing of frictionally sensitive and / or abrasive substances containing filling material attached rotating Hollow shaft, on the outer circumference of a stuffing box and a stuffing box bearing a stationary vapor pipe is connected, and one concentrically through the Hollow shaft extending through into the container and also rotating with it Pipe, shaft or the like. That by means of a stuffing box against the stationary vapor pipe is sealed, that is, to protect the Stuffing box (4, 12) and the stuffing box bearing (5) of the stationary vapor pipe (14) before the ingress of friction-sensitive and / or abrasive solids from the Inside the container between the rotating shafts (2,7) a means of resting against them Seals (8t9) sealed filter 10 is arranged. 2. Rotary feedthrough according to claim 1, characterized in that the Filter (10) is tubular. 3. Rotary feedthrough according to claim 1 or 2, characterized in that da3. the filter (10) is arranged to be replaceable. 4. Rotary feedthrough according to one of claims 1 to 3, characterized in that that a candle filter made of sintered metal or ceramic is used as the filter (10). 5. rotary leadthrough according to one of claims 1 to 4, characterized in that da3 the filter (10) is connected to the hollow shaft (2) and with a rotating sieve (15) is connected upstream in the area of the container opening. 6. Application of the rotary feedthrough according to one of claims 1 to 5 for a rotating container (1), in which the inside is connected to the hollow shaft (2) rotating tube (7) a stationary spray tube (16) with another in the interior of the spray tube guided stationary line pipe (2) is, a common bearing (18) for the tube (7) and the spray tube (16) in the rotating container (1) is arranged in the free space above the filling material and sealed on both sides in the axial direction by means of sealing rings (19) and optionally additionally lubricated by means of a barrier medium fed through the pipe (228) and / or is cooled.