WO1998008627A1

WO1998008627A1 - Arrangement for reels for suction hoses

Info

Publication number: WO1998008627A1
Application number: PCT/SE1997/001402
Authority: WO
Inventors: Willy FURÅSEN
Original assignee: W M-Furåsen Hb
Priority date: 1996-08-30
Filing date: 1997-08-26
Publication date: 1998-03-05
Also published as: SE505319C2; SE9603147D0; AU3876797A; SE9603147L

Abstract

Hose reel with a rotatable hub (4) having a tangentially directed connection piece (5) for a hose arranged at its periphery and having an outlet conduit (6) to a suction arrangement, said outlet conduit being parallel to the rotation axis of the hub. In a cavity of the hub a guide vane (12) is placed for the purpose of changing the position of elongated objects which are sucked in through the hose connection piece, said position changing from a tangential direction to an axial direction during the passage from the inlet through the hose connection piece to the outlet conduit. Thus such objects are prevented from being stuck in a bend between the hose connection piece and the outlet, which is transversely arranged in relation to said hose connection piece.

Description

TITLE:

Arrangement for reels for suction hoses.

TECHNICAL FIELD:

The present invention relates to an arrangement for hose reels intended for suction hoses such as hoses in ventilation plants.

BACKGROUND OF THE INVENTION: In some circumstances, when materials shall be sucked up from different places within an area around a suction arrangement, such as for example a ventilating fan, it is common to use a suction hose. The hose opening and its nozzle can be placed where the suction is to be carried out and the material can be transferred through the hose to a collecting place. A certain hose length is required for the nozzle to be movable within the intended area, and a hose reel is provided so that the hose doesn't clutter up the area if the hose is lying curled over said area when there is no need for the hose to be stretched out. Only the required hose length needs to be unrolled from said hose reel for each application occasion regarding the nozzle.

Arrangements of this type are often in the form of ventilation plants intended for defined exhaustion of gases and particles from working stations which are moved over a working area. An example of this is when said arrangement is used at welding works, where particles are spread and gases are formed and where one moves all over a construction from one welding point to another. The invention is of course applicable in such other contexts where a suction hose with an attached hose reel is used, and then it can be a matter of exhaustion of gases and larger or smaller particles or, alternatively, exhaustion of liquid which may be contaminated with solid particles.

For a hose reel intended for such plants tc obtain a reasonable size, it is necessary for the hose to extend tangentially outwards from the rotatable hub of the reel. Said hub shall in turn be connected to a conduit which leads to the suction arrangement, said connection being concentrical in relation to the rotation axis of the hub. Thus, an angular transition is obtained between the tangential extension of the hose connection piece and the suction conduit extension along the rotation axis, that is, an angle of approximately 90°, to which may come additional bends as regards the course of the conduit extension from the periphery of the hub to its centre. This implies a problem in that objects which are longer than the shortest linear extension over a bend are going to get stuck in such a bend, which results in a breakdown requiring the clearing of the conduit. By arranging a screen or the like ahead of the bend this problem may be prevented, but this, however, means that a container must be arranged ahead of the screen for the purpose of collecting those objects which will not slip through said screen, whereupon said container must be emptied from time to time. This is a disadvantage, compared to if the material which is sucked in can pass through the entire plant to the collecting container which, especially at the ventilation aggregate, is connected to the suction arrangement itself. It has previously been mentioned that ventilation arrangements provided with hoses which can be wound often can be found at working places for welding, at which long, rodshaped objects in the form of welding electrodes also can be found, whereupon there is a risk for such objects to be sucked into the ventilation arrangement.

SUMMARY OF THE INVENTION: The object of the invention is to provide a hub arrangement for hose reels for suction hoses, which makes it possible also for longer, rodshaped objects to pass the conduit extension between the hose clamp in the hose reel and the suction conduit, which extends outwards from the centre of the hose reel. This is achieved by means of a link arrangement, which rotates the object from the tangential direction with which it arrives into the hub, to a position which is parallel to the central axle of the hub. By this the object can be transferred from the hose inlet to the central conduit and be further transported to the suction arrangement and its collecting container.

BRIEF DESCRIPTION OF THE DRAWINGS:

An embodiment of the invention will be described in the following with reference to the annexed drawings, in which

Fig. 1 shows a perspective view of the hose reel,

Fig. 2 shows a sideview of a hub intended for the hose reel,

Fig. 3 shows a front view towards the exposed hub to illustrate the built-in link arrangement of the hub, and

Fig. 4 shows a perspective view of the exposed hub.

PREFERRED EMBODIMENT: Fig. 1 shows a perspective view of a hose reel 1 with a wound hose 2. The hose reel is provided with two gables 3 which, as is shown in the figure, consist of one ring each forming the periphery and a number of spokes which connect the respective ring of each gable with a hub . The gables can however be designed in another way and can for example be in the form of integral discs. The hub 4 is provided with an inner cavity, into which a connection piece 5 stretches, to which connection piece the inner end of the hose is attached. The connection piece 5 stretches tangentially into the circular hub. The hub 4 is pivotally arranged about an axle, which at the same time is part of a connection conduit to a suction arrangement. This combination of axle and conduit part is herinafter called the central conduit 6.

The central conduit 6 shall be connected to a suction arrangement which is capable of a suction effect at a nozzle which is attached to the end 8 of the hose 2. A condition for this is that the suction arragement primarily is intended for ventilation through exhaustion of injurious materials which for example are generated at a work operation, the nozzle being placed where the operation takes place. For this reason the arrangement is provided with a collecting container which is intended for solid objects and particles which follow the sucked-m air.

Fig. 2 shows a side view of the hose reel. From this it is apparent that the hub 4 is in the form of a funnel, from the point of which funnel the central conduit 6 extends. Furthermore, the hose connection piece 5 is shown as a tangentially and inwardly directed conduit which is arranged at the wider end of the funnel, at which conduit the inner end of the hose shall be attached. The wider end of the hub is closed with a cover 10 which preferably is removable, should a clearing operation be required.

Fig. 3 and 4 show the inside of the hub 4, as the wider end of the hub is shown exposed with its cover removed. As is shown, a guide vane 12 runs between the inside face of the funnel-shaped hub 4 and the inside plane of the cover 10. The guide vane 12 starts at the outer edge of the hub at a distance of approximately 220° from the inlet 13 of the hose connection piece 5 in the hub, whereupon said guide vane extends in an inwards directed spiral line until it is approximately in level with the inlet 13, although inside said inlet, whereupon said guide vane at a short distance from the central conduit 6 tranforms into a distinctly inwards directed curve 15, which ends over the central conduit 6.

When the arrangement consisting of the hose reel and the suction arrangement is in use, sucked-in smaller particles and objects, which have a compact form (cubic/spherical) and such a size that they can pass through the hose, will flow tangentially inwards at the periphery of the hub through the opening 13 of the hose clamp in the hub in an inwards directed spiral line, whereupon said particles and objects will be transferred out through the central conduit 6 to the suction arrangement. Such particles and objects can pass even rather sharp bends and as regards such particles and objects the device according to the invention does not differ from the function of previously known hose reels. If, however, elongated, rodshaped objects of a certain lenqth are sucked in, such objects can only pass straight conduits and conduits having a slight curvature, and at the passage from one conduit extension to another there is always a risk of said objects obtaining a vertical position in relation to the flow and getting stuck. As regards the device according to the invention, such objects will be transferred through the hose 2 by means of a suction effect, and it is in that connection important not to arrange the hose in too sharp bends and that the wound hose obtains a large radius in relation to the hose reel. The objects will then be sucked in through the opening 13 in the hub 4 for the hose connection piece 5, which can be done in a linear manner. Through the air flow, or the fluid flow (if the suction arrangement is a liquid pump), the rodshaped objects will gradually unlink, for which the inside of the hub will provide a sufficient space, and are further transferred between the funnel-shaped wall of the hub and the cover 10 throughout the entire motion, which has a generally tangential extension. When an object has been transferred about three quarters of a run from the inlet, the front end of the object will impinge upon the guide vane 12 and the object will obtain an increasingly transverse position in relation to the cover during the passage along the section 14 of the vane, whereupon the object is straightened up by means of the end section 15 of the vane and obtains a position at which the longitudinal axis of the object is roughly parallel to the extension of the central conduit 6, whereupon the object is transferred in its longitudinal direction through the central conduit and towards the suction arrangement. The invention may be varied within the scope of the appended claims. Thus, it is not necessary for the huh to be in the form of a funnel, as a frustrum of a cone, a spherical cap or a flat cylindrical form can provide the described function. Also, the angle position and the extension length of the guide vane can be varied within certain limits. However, the function which involves that rodshaped objects at first reach a slighter spiral-formed section of the quide vane and gradually begin to be straightened up into a transverse position in relation to the hub whereupon said objects reach a sharper inwards directed section of the guide vane and obtain their final straightening which is in parallel with the exhaustion conduit, seems to be a fundamental principle in order to achieve the desired effect.

Claims

CLAIMS:

1. Arrangement for hose reels (1) having a hub (4) which is rotatable around a rotation axis, at which hub a hose connection piece (5) is arranged with its inner end being connected to a hose (2), said hose connection piece extending inwards at the periphery in an essentially tangential direction to an inner cavity in the rotatable hub (4) of the hose reel, from which hub an outlet conduit (6) extends which is centrally arranged in relation to the hub, said outlet conduit extending in an essentially axial direction in relation to the rotatable hub and accordingly extending along the rotation axis of the hub and transversely in relation to the tangential inlet (13) of the hose connection piece (5), said outlet conduit being connected to a suction arrangement, c h a r a c t e r i z e d i n that said cavity in the hub (4) has such width in axial direction that it is possible for elongated objects which are sucked in through the hose clamp and which have an intended maximum size to be rotated and obtain an axial extension in relation to its longitudinal axis, and that a guide vane (12) is arranged in said cavity, said guide vane having a first, slightly curved, spiral-formed extension directed into the centre of the hub, the outer end of said guide vane extension in the hub being directed away from the hose clamp inlet (13), whereupon the guide vane following said section transforms into a section (15) having a distinctly inwards directed spiral-formed extension, said section ending over said opening of the outlet conduit (6) in the hub, said outlet conduit having an axial extension, whereby the front end of said elongated object, following the tangential movement of its longitudinal axis from the hose clamp inlet (13), impinges upon said first section of the guide vane and obtains a gradual redirection into an axial position in relation to the hub, whereupon said object impinges upon said last section (15) of the guide vane and eventually is directed to an essentially axial position close to the opening of the outlet conduit (6), the longitudinal axis of said object being essentially parallel to the longitudinal axis of said outlet conduit.

2. Arrangement according to claim 1, c h a r a c t e r i z e d i n that the cavity of the hub (4) is funnel- shaped, the opening of the hose connection piece (5) being tangentially located at the wider end of the cavity and the opening of the outlet conduit (6) being located at the centre of the narrower end of the cavity.