DE8812734U1 - Loading head for loading bulk goods - Google Patents

Description

Bernhard Beumer Maschinenfabrik KG, Oelder Str. 40, 47 20 Beckum

Loading head for loading bulk goods

The innovation concerns a loading head for loading silos and the like with bulk material, in particular silo vehicles with fine-grained bulk material such as mixed products made of cement, sand and aggregates etc.

according to the preamble of claim 1.

For loading loose bulk materials such as cement, gravel, Thomas and stone flour, plastic granules, grain and animal feed, loose loading systems are often used to achieve high throughputs and

Office Bremen / Bremen Office:

1610 Hoiieraiiee 32, D-2SÜG Bremen i

PO Box / P.O-Bot 10 7127

• Telephone: (0421) »349071

Telex: 244 958 bopatd Fax: (04 21)34 69 68 CCTTTn + &Igr;&Pgr; Cables: Diagram Bremen

Deutsche Bank, Bremen (Bank code 290 700 50) 1112002

Office Munich/Munich Office in Pittsburgh

"widenmayersiraSe 4, D-S8G0 Munich 22

P.O. Box 22 0137

Telephone: (089)· 22 3311

Telex: 524 282 forbod Fax: (089) 2215 69 CCITT &Pgr;+&Igr;&Pgr; Cables: Telepatent Munich

,Munich • (,BTZ 7pO 200 01) 6 400194 333

PSchA Hamburg

(Bank code 200100 20) 126083-202

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Save on personnel costs and expensive packaging such as bags, boxes, etc.

The bulk material is generally removed from a silo and fed either directly or with compressed air or a conveyor to a so-called loading head.

The loading head is generally designed to be variable in length in order to compensate for changing height differences between the different vehicles to be loaded and the loading point. In addition to height compensation, the loading head is also responsible for closing the loading system, especially when the vehicle to be loaded is full and the loading process is complete.

In order to automate the end of the loading process, thereby saving personnel costs and improving the accuracy of loading, loading heads are generally equipped with a so-called level sensor, which can work according to various physical principles and which triggers the shutdown of the loading system when the bulk material reaches it.

In the case of dusty bulk materials, it is also necessary to suppress the dust clouds that arise when loading the bulk material and to prevent dust from escaping into the environment. Loading heads for dusty bulk materials are therefore generally designed with double walls, with the resulting dust clouds being sucked away through the ring channel located between the two concentrically arranged walls.

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In addition, bulk materials that produce a lot of dust, such as cement or stone dust, are generally transported in closed silo vehicles. To load the silo vehicles, they have a dome that generally has a circular cross-section and onto which the loading head is placed with a conical surface covered with soft rubber or a similar sealing material, the so-called silo top.

In order to achieve the variable length, conventional loading heads generally consist of two hollow components that are variable in length and surround each other, such as a folding bilge or - particularly for highly abrasive bulk materials - sheet metal cylinders that can be pushed into one another, which form a type of telescopic tube. The lower part of a conventional loading head consists of a first sheet metal cylinder that runs into a funnel and a second sheet metal cylinder that surrounds it, supports the silo mounting cone and forms the annular gap for dust extraction. The outer casing tube.

The operation of known loading heads, in particular the closing or opening of the lower opening, is carried out in conventional loading heads by means of a multi-cable suspension, where a plate lift valve or similar is connected to a centric steel cable or similar, while the traverse hangs on further cables, with a level indicator generally arranged below the lift valve. The loading head is moved into position with the off-center cables, while the closure is opened with the centric cable.

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Such a multi-cable suspension is obviously not only extremely complex, but also relatively complicated with regard to handling the loading head.

When loading bulk material with poor flow properties, such as some ready-mixed products made of cement, sand and aggregates, a pile of bulk material with a relatively large slope angle forms in the silo container. This means that unused empty spaces remain in the silo vehicle when the tip of the bulk material cone reaches the level indicator. This is extremely disadvantageous for several reasons. In addition, bridging or similar can occur (also) within the loading head if no forces are exerted on the bulk material which the internal friction of the bulk material can always be reliably overcome by external forces.

The aim of this innovation is to improve the known loading heads while avoiding the above-mentioned and other disadvantages.

This problem is solved by the characterizing part of claim 1.

Distribution plates that rotate below a discharge opening (due to a drive) are known per se, but the use of such end or loading aids has so far been clearly ruled out for loading heads of this type. If one wanted to provide a distribution plate for known loading head designs and if one were to use the drive

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of the distribution plate (e.g. via a belt drive from an electric motor flanged to the crossbeam), it must be ensured that the distribution plate can move axially relative to the silo mounting cone. Due to the rigid axis between the belt drive and the distribution plate, the entire crossbeam would have to be moved with the electric motor flanged on, since a change in distance between the crossbeam, which necessarily protrudes beyond the outer casing, and the silo mounting cone must be possible, so that, for example, two cutouts running in the axial direction would have to be made in the outer cylinder casing. Such a design, however, has the serious disadvantage that seals that can be moved with the crossbeam and cover the recesses must be provided in order to prevent dust from escaping into the environment and to ensure that the outer annular gap functions as a dust extraction channel. In addition to the considerable design and manufacturing effort required for this, it would also be disadvantageous that the sealing elements would wear out extremely quickly and would have to be replaced, particularly when loading abrasive materials (such as cement or stone powder). In addition, the annular gap could become clogged over time, and the maintenance work required on such a loading head would result in downtime for the entire bulk loading system and thus a significant deterioration in efficiency.

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Preferred embodiments of the innovation are described in the subclaims.

The innovation is explained further using an example embodiment with reference to a drawing. The drawing shows:

Fig. 1 shows a section through a loading head according to the invention and a detail of a silo positioned underneath;

Fig. 2 the same loading head after lowering onto the silo and

Fig. 3 the same loading head after further lowering and opening.

Fig. 1 shows a simplified and somewhat schematic representation of a loading head 2 according to the innovation hanging on a vertically arranged feed pipe 1 in a side section. Below the loading head 2, a fragmentary representation of the silo 3 to be filled of a silo vehicle (not shown here) is shown. The loading head consists of a funnel 4 with a first hollow component 5 of variable length arranged above it, which in the case of the device shown in the drawing

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&iacgr; tion shown embodiment a from interlocking

Telescopic tube 5 formed from &EEgr; movable pipe sections

S]. The telescopic tube 5 is in the illustrated design

example of a second hollow component in the form of a

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The bellows 6 merges into an outer casing tube 7 of the loading head. The outer casing tube 7

A third hollow component of variable length in the form of a bellows 8 is connected at the bottom, and a silo mounting cone 9 is closed by a distribution plate 10 which also serves as a closure element. The bulk material is conveyed in the direction of arrow 11 through the feed pipe 1 and falls through the telescopic pipe 5 into the funnel 4, from there onto the distribution plate 10 and partially fills the cavity 13 formed between the silo mounting cone 9, the distribution plate 10 and the funnel mouth 12 of the funnel until the flow of the bulk material comes to a standstill.

The distribution plate 10 is attached to an axle 14, which is driven by a belt drive 15 in front of an electric motor 16. The belt drive 15 and the electric motor 16 are arranged on a cross-beam 17 that projects laterally beyond the casing tube 7. The cross-beam 17 hangs via a hook 18 on a rope guided over a deflection roller 19. When the rope 20 is tightened or loosened in the direction of the arrow 21, the cross-beam 17 with the lower part 22 of the loading head hanging from it moves up or down, while the telescopic tube 5 and the bellows adapt to the changing distance between the lower part of the loading head and the fixed feed tube 1.

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For loading, the lower part of the loading head is first lowered until the loading head with the silo mounting cone 9 rests on the dome 23 of the silo 3, as shown in Fig. 2.

If the rope 20 is further released, as shown in Fig. 3, the crossbeam 7 and the distribution plate 10 connected to it via the axis 14 are lowered further, whereby the bellows 8 is compressed and an annular gap 24 is released between the silo support cone and the distribution plate 10.

The bulk material now falls onto the now rotating distribution plate 10 and into the silo in the direction of the arrows 25. At the same time, the dust created is sucked off in the direction of the arrows 26 via the annular cavities 27 and 28 formed between the telescopic tube 5 and bellows 6 or outer casing tube 7 and the funnel 4 and bellows 8 or outer casing tube 7. The sucked-in dust leaves the loading head in the direction of the arrow 29 via the nozzle 3ö.

The innovative arrangement of a bellows between the silo mounting cone 9 and the outer casing tube 7 of the loading head creates a loading head with a known function, in which the otherwise usual, extremely fault-sensitive seals between the cross-beam 17 and the outer casing tube 7 can be dispensed with. A loading head in the innovative design is characterized by lower production costs, a longer service life and greater operational reliability.

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1 Feed pipe Component) &rgr; 0 Loading head Component) 3. silo 4 4 funnel 5 5 Telescopic tube (= first hollow 6 &Oacgr; Bellows (= second hollow 10* - Shell surface (from 7 7 Sheath tube 8th 8th Bellows 9 9 Silo mounting cone &igr;&sfgr;> ⁾ 10 Distribution plate 14' - Longitudinal axis (of 2; 11 11 Arrow 12 12 funnel mouth ¹ * cavity >14 14 Axis (driven -, for 1O) 1 ¹ ? ¹ 5 belt 16 engine 17 17 Crossbeam 18 13 Hook 19 19 Deflection pulley PO 20 Rope 21 21 Arrow 22 22 lower part of the loading head 23 25 Cathedral 24 24 Annular gap 25 Arrow 26 Arrow 27 27 cavity 28 28 cavity 29 29 Arrow 30 30 Support

Claims (8)

Bernhard Beumer Maschinenfabrik KG, Oelder Str. 40, 4720 Beckum Loading head for loading bulk goods Claims 1. Loading head for loading silos and the like with bulk material, in particular silo vehicles with fine-grained bulk material such as mixed products made of cement, sand and aggregates and the like through a dome, with a funnel and an outer casing pipe surrounding it, a centrally 1618 Office Bremen / Bremen Office: Hollerallee 32, D-2800 Bremen 1 P.O.Box 10 7127 •Telephone: (0421) '349071 Telex: 244 958 bopatd Fax: (0421)34 69 68 CCITT Il-fill Cables: Diagram Bremen Deutsche Bank, B.«men (BLZ29070O5O)U12O02 Bremer Bank, Bfemtfi! (BLZ29080bIp) 1| Office Munich/Munich Office inur paununwiii Widenmayerstrasse 4, D-8000 Munich 22 P.O. Box 22 0137 Telephone: (089)· 22 33 11 Telex: 524 282 forbod Fax: (089) 2215 69 CCITTII + IH Cables: Telepatent Munich ·' Hyböbank, Munich j >{js,it 7$Ö20001)6400 IiM333 PSchA Hamburg (BLZ20010020) 126083-202 BOEHMERTi&^OEHMKRT ^ \'.' ·"· a first hollow component of variable length arranged above the funnel, a second hollow component of variable length surrounding the latter and arranged centrally above the casing tube, a third hollow component of variable length connecting the silo mounting cone to the casing tube, a cross-beam arranged at the upper end section of the funnel, projecting laterally beyond the casing tube and carrying the distribution plate and a plate drive, and a silo mounting cone, characterized by a distribution plate (10) arranged essentially centrally below the funnel (4) on a driven axle (14). 2. Loading head according to claim 1, characterized in that the distribution plate (10) is arranged on a driven axle (14). 3. Loading head according to claim 1 or 2, characterized in that the distribution plate (10) has a conical outer surface (10*). 4. Loading head according to one or more of claims 1 to 3, characterized in that the first hollow component (5) and/or the second hollow component (6) and/or the third hollow component (8) is a bellows. 5. Loading head according to one or more of claims 1 to 3, characterized in that the first hollow component (S) and/or the second component (6) and/or the third component (8) consists of tube sections which can be pushed into one another in a telescopic manner. • I MH MM * • t · t •# t I I 6. Loading head according to one or more of the preceding claims , characterized by a single-cable (20) suspension. 7. Loading head according to claim 6, characterized in that the cross-beam (17) is connected to one end (20') of the cable l LV/ VT=LUUIlUCIt XOLf WCXV-IICO CXIl Ot=XIlC=III CXl H-ICL. C;ll llill^JCT JUJ-L. CXIlC=X. Cable winch or similar. 8. Loading head according to claim 7, characterized in that the cable (20) above its end section (20*) facing away from the cable winch or the like is deflected by a deflection roller (19) or the like essentially transversely to the longitudinal axis (14*) and is guided away from the loading head (2).