CA1289501C - Method and apparatus for forming belts to pipe conveyor - Google Patents
Method and apparatus for forming belts to pipe conveyorInfo
- Publication number
- CA1289501C CA1289501C CA000572883A CA572883A CA1289501C CA 1289501 C CA1289501 C CA 1289501C CA 000572883 A CA000572883 A CA 000572883A CA 572883 A CA572883 A CA 572883A CA 1289501 C CA1289501 C CA 1289501C
- Authority
- CA
- Canada
- Prior art keywords
- nozzle
- support
- conveyor belts
- roller stations
- drawn
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Structure Of Belt Conveyors (AREA)
Abstract
ABSTRACT.
The invention proposes a method and an apparatus for drawing a conveyor-belt, shared into a tube, into and through support-roller stations, the said belts being rolled to a diameter which is smaller than the eventual operating diameter and being held in this configuration by an accompanying clamping means such as a net-stocking. The desired diameter of the belt is obtained by means of a reducing element in the form of a nozzle.
The invention proposes a method and an apparatus for drawing a conveyor-belt, shared into a tube, into and through support-roller stations, the said belts being rolled to a diameter which is smaller than the eventual operating diameter and being held in this configuration by an accompanying clamping means such as a net-stocking. The desired diameter of the belt is obtained by means of a reducing element in the form of a nozzle.
Description
Specification me invention relates to a method and an apparatus for drawing resilient conveyor-belts, shaped into tubes, into and through support-roller stations arranged along the path of the conveyor.
~ rawing flat conveyor-belts, which have been shaped into tubes, into and through support-roller stations presents considerable difficulties which increase as the length of the conveyor increases.
Belts of this kind are introduced into the stations manually by a series of helpers who endeavour to keep the belt rolled up. Since the belt, shaped into a tube, was originally made flat, it tends to open up between the support-roller stations where it is not guided. A
considerable amount of force is required, both peripherally and longitudinally. It has been found, however, that, regardless of the number of helpers, it is impossible to avoid damaging the edges of the belt when guiding it through the individual roller-stations since a new threading-in operation must be carried out in front of each station.
It is the purpose of the invention to design a method and an apparatus which will simplify the operation of drawing an originally flat conveyor-belt, which has been shaped into a tube, into and through support-roller stations. Furthermore, this operation is to be carried out without using much force, with only a few helpers, or even mechanically.
According to the invention, this purpose is accomplished in that, prior to being drawn into the support-roller stations, the conveyor-belts are shaped into tubes of a diameter smaller than the eventual operating diameter and are held thus while being drawn through the support-roller stations. Because of the reduction in diameter, as compared with the eventual operating diameter of the tubular belt, the said belt may easily passed through each roller station without requiring much force. The belts are preferably held in the reduced-diameter configuration by means of a preferably constant force acting from the outside, the overlapping edges of the belt being no longer able ycc/sp ~Z8~
to escape from this fixed position. ~amage to the belt during its passage through the support-roller stations is thus practically eliminated.
According to a further concept of the invention, the conveyor-belts are drawn through the roller stations by means of cables or the like previously passed through the said stations, the clamping force acting peripherally upon the tubular conveyor-belt being preferably produced or maintained by the force of the traction means (the cables).
In the vicinity of the returning stations, the conveyor belts are opened up again, i.e. the tubular belt is relieved peripherally. me belt is then returned, preferably passing around a return-drum, after which the flat belt is again shaped into a tube and is passed through the returning roller-stations in the reduced-diameter configuration.
In order to facilitate the drawing of the belt and/or the net through the shaping station, it is proposed to apply a lubricant, for example talcum or the like, since in this area sliding friction (metal-to-rubber) occurs.
~rawing the conveyor-belt into and through the roller-stations may be effected either manually or mechanically. In the latter case, a winch may be used to wind up the cable while the belt moves in the longitudinal direction. m is arrangement is preferable in the case of long conveyor-paths.
As regards the apparatus, the purpose is accomplished with a nozzle-like element arranged, as seen in the direction of traction, in front of the first support-roller station, and with a chamber which co-operates therewith and comprises a clamping means acting in the peripheral direction. me clamping means is preferably in the form of an endless net-stocking which is arranged within the chamber and which is capable of keeping the conveyor-belt, shaped into a tube, within a predetermined ranqe of diameters which is less than the eventual ycc/sp ~289501 .
operating diameter.
According to another concept of the invention, the net-chamber surrounds the area of minimal diameter of the nozzle-like element, the net (net-stocking) being adapted to be drawn onto the reduced-diameter conveyor-belt by applying the peripheral force necessary for drawing it into and through the support-roller stations.
It is also proposed to divide the element, as seen in the longitudinal direction, in order to allow it to be removed from a section of belt that has already been drawn. It is preferable to select a two-part design, the said parts being joined together by hinges and being thus adapted to fold open. In this case, the nozzle-inlet is also flat, matching the flat conveyor-belt. For the purpose of observing the behaviour of the belt during its conversion from a flat to a tubular configuration it is also proposed to make the belt-inlet at the entrance to the nozzle as largely as possible open (preferably in the upward direction).
In the last section of the nozzle, the diameter thereof is smaller than that of the eventual operating diameter of the conveyor-belt after it has been formed into a tube. Care must also be taken to ensure that the diameter remains below the eventual operating diameter even after the net-stocking has been fitted, so that passage through the support-roller stations will present no problems.
According to still another concept of the invention, the end of the nozzle is beaded in order to prevent damage to the conveyor-belt which tends to open up and to suffer increased edge-pressure at the end of the nozzle.
As already indicated, arranged around the end-area of the nozzle is a chamber (a drum) acting as a storage-container for the net (the net-stocking). It is also proposed to provide the end of the net-chamber near the nozzle with a cover. On the one hand, this forms astop for the net which is to be drawn out; on the other hand, it surrounds the beaded end of the nozzle and itself forms an additional ycc/sp ~2B9SO~I
nozzle-opening, the radial section of which bears lightly upon the bead-like end of the nozzle. The annular passage formed between the said section and the bead is preferably of a dimension such that a braking action is provided when the net is pulled through. However, the said annular passage may be adapted to nets of different thickness by means of intermediate rings arranged in the area between the cover and the net-chamber.
It is desirable to provide, along the nozzle-like element and/or the net-chamber, a plurality of inspection-openings adapted to be closed by flaps, for the purpose of dealing with operating problems.
The direction of overlap of the belt may also be checked or determined through these openings.
The net surrounding the tubular conveyor belt under preload can be slit open in the vicinity of its overlapping edges, whereby the load on the belt is relieved and it assumes its operating diameter, supporting itself against the surrounding support-rollers or support-roller stations.
me characteristics of the invention ensure that conveyor belts which are flat per se but have been shaped into tubes can be threaded into or passed through support-roller stations without constrictive resistance. The invention may be used both for stationary support-rollers and for support-roller garlands.
The invention, illustrated in the drawing attached hereto, is described hereinafter.
In the said drawing:
Fig. 1 and 2 are different views of diagrammatical representations of the apparatus according to the invention;
Fig. 3 shows a detail of the shaping and netting area.
Figs. 1 and 2 show different views of apparatus 1 according to the invention with the following components: nozzle-like element 2, chamber 3, net 4 stored therein, flat conveyor belt 5, roller conveyor belt 5', cover 6 and traction-cable 7. m e flat belt is introduced into ~h ~Cj ycc/sp lX~39501 nozzle-inlet 8 which is also flat and is upwardly open. The decreasing diameter of nozzle-like element 2 converts the belt into a tube 5' which emerges at end 9 of the nozzle. Diameter D here is less than the eventual operating diameter determined by distance D' between the support-rollers. End 9 of the nozzle is provided with a bead 10 in order to prevent damage to the edges of the emerging belt. Cover 6 has a radial section 11 which bears lightly upon bead 10 so that a slight braking action is applied to the net as it is drawn from chamber 3.
Cables 7 draw the tubular belt, surrounded by net 4, through support-roller stations 12. Net 4 is drawn automatically through annular space 13 produced between bead 10 and section 11. In order to provide optimal adaptation to nets of different thickness, intermediate rings 15 may be fitted between end 14 of net-chamber 3 and cover 6. For the purpose of observing the troughing operation, openings 17, provided with flaps 16, are available. Apparatus 1 may be secured to the floor, or to other stationary equipment, by means of attachments 18.
Fig. 3 shows a detail of the shaping and netting area, comprising chamber 3, net 4 and the area in which it is accommodated, belt 5', bead 10, and annular space 13 formed between bead 10 and radial section 11, not shown.
~i ycc/sp
~ rawing flat conveyor-belts, which have been shaped into tubes, into and through support-roller stations presents considerable difficulties which increase as the length of the conveyor increases.
Belts of this kind are introduced into the stations manually by a series of helpers who endeavour to keep the belt rolled up. Since the belt, shaped into a tube, was originally made flat, it tends to open up between the support-roller stations where it is not guided. A
considerable amount of force is required, both peripherally and longitudinally. It has been found, however, that, regardless of the number of helpers, it is impossible to avoid damaging the edges of the belt when guiding it through the individual roller-stations since a new threading-in operation must be carried out in front of each station.
It is the purpose of the invention to design a method and an apparatus which will simplify the operation of drawing an originally flat conveyor-belt, which has been shaped into a tube, into and through support-roller stations. Furthermore, this operation is to be carried out without using much force, with only a few helpers, or even mechanically.
According to the invention, this purpose is accomplished in that, prior to being drawn into the support-roller stations, the conveyor-belts are shaped into tubes of a diameter smaller than the eventual operating diameter and are held thus while being drawn through the support-roller stations. Because of the reduction in diameter, as compared with the eventual operating diameter of the tubular belt, the said belt may easily passed through each roller station without requiring much force. The belts are preferably held in the reduced-diameter configuration by means of a preferably constant force acting from the outside, the overlapping edges of the belt being no longer able ycc/sp ~Z8~
to escape from this fixed position. ~amage to the belt during its passage through the support-roller stations is thus practically eliminated.
According to a further concept of the invention, the conveyor-belts are drawn through the roller stations by means of cables or the like previously passed through the said stations, the clamping force acting peripherally upon the tubular conveyor-belt being preferably produced or maintained by the force of the traction means (the cables).
In the vicinity of the returning stations, the conveyor belts are opened up again, i.e. the tubular belt is relieved peripherally. me belt is then returned, preferably passing around a return-drum, after which the flat belt is again shaped into a tube and is passed through the returning roller-stations in the reduced-diameter configuration.
In order to facilitate the drawing of the belt and/or the net through the shaping station, it is proposed to apply a lubricant, for example talcum or the like, since in this area sliding friction (metal-to-rubber) occurs.
~rawing the conveyor-belt into and through the roller-stations may be effected either manually or mechanically. In the latter case, a winch may be used to wind up the cable while the belt moves in the longitudinal direction. m is arrangement is preferable in the case of long conveyor-paths.
As regards the apparatus, the purpose is accomplished with a nozzle-like element arranged, as seen in the direction of traction, in front of the first support-roller station, and with a chamber which co-operates therewith and comprises a clamping means acting in the peripheral direction. me clamping means is preferably in the form of an endless net-stocking which is arranged within the chamber and which is capable of keeping the conveyor-belt, shaped into a tube, within a predetermined ranqe of diameters which is less than the eventual ycc/sp ~289501 .
operating diameter.
According to another concept of the invention, the net-chamber surrounds the area of minimal diameter of the nozzle-like element, the net (net-stocking) being adapted to be drawn onto the reduced-diameter conveyor-belt by applying the peripheral force necessary for drawing it into and through the support-roller stations.
It is also proposed to divide the element, as seen in the longitudinal direction, in order to allow it to be removed from a section of belt that has already been drawn. It is preferable to select a two-part design, the said parts being joined together by hinges and being thus adapted to fold open. In this case, the nozzle-inlet is also flat, matching the flat conveyor-belt. For the purpose of observing the behaviour of the belt during its conversion from a flat to a tubular configuration it is also proposed to make the belt-inlet at the entrance to the nozzle as largely as possible open (preferably in the upward direction).
In the last section of the nozzle, the diameter thereof is smaller than that of the eventual operating diameter of the conveyor-belt after it has been formed into a tube. Care must also be taken to ensure that the diameter remains below the eventual operating diameter even after the net-stocking has been fitted, so that passage through the support-roller stations will present no problems.
According to still another concept of the invention, the end of the nozzle is beaded in order to prevent damage to the conveyor-belt which tends to open up and to suffer increased edge-pressure at the end of the nozzle.
As already indicated, arranged around the end-area of the nozzle is a chamber (a drum) acting as a storage-container for the net (the net-stocking). It is also proposed to provide the end of the net-chamber near the nozzle with a cover. On the one hand, this forms astop for the net which is to be drawn out; on the other hand, it surrounds the beaded end of the nozzle and itself forms an additional ycc/sp ~2B9SO~I
nozzle-opening, the radial section of which bears lightly upon the bead-like end of the nozzle. The annular passage formed between the said section and the bead is preferably of a dimension such that a braking action is provided when the net is pulled through. However, the said annular passage may be adapted to nets of different thickness by means of intermediate rings arranged in the area between the cover and the net-chamber.
It is desirable to provide, along the nozzle-like element and/or the net-chamber, a plurality of inspection-openings adapted to be closed by flaps, for the purpose of dealing with operating problems.
The direction of overlap of the belt may also be checked or determined through these openings.
The net surrounding the tubular conveyor belt under preload can be slit open in the vicinity of its overlapping edges, whereby the load on the belt is relieved and it assumes its operating diameter, supporting itself against the surrounding support-rollers or support-roller stations.
me characteristics of the invention ensure that conveyor belts which are flat per se but have been shaped into tubes can be threaded into or passed through support-roller stations without constrictive resistance. The invention may be used both for stationary support-rollers and for support-roller garlands.
The invention, illustrated in the drawing attached hereto, is described hereinafter.
In the said drawing:
Fig. 1 and 2 are different views of diagrammatical representations of the apparatus according to the invention;
Fig. 3 shows a detail of the shaping and netting area.
Figs. 1 and 2 show different views of apparatus 1 according to the invention with the following components: nozzle-like element 2, chamber 3, net 4 stored therein, flat conveyor belt 5, roller conveyor belt 5', cover 6 and traction-cable 7. m e flat belt is introduced into ~h ~Cj ycc/sp lX~39501 nozzle-inlet 8 which is also flat and is upwardly open. The decreasing diameter of nozzle-like element 2 converts the belt into a tube 5' which emerges at end 9 of the nozzle. Diameter D here is less than the eventual operating diameter determined by distance D' between the support-rollers. End 9 of the nozzle is provided with a bead 10 in order to prevent damage to the edges of the emerging belt. Cover 6 has a radial section 11 which bears lightly upon bead 10 so that a slight braking action is applied to the net as it is drawn from chamber 3.
Cables 7 draw the tubular belt, surrounded by net 4, through support-roller stations 12. Net 4 is drawn automatically through annular space 13 produced between bead 10 and section 11. In order to provide optimal adaptation to nets of different thickness, intermediate rings 15 may be fitted between end 14 of net-chamber 3 and cover 6. For the purpose of observing the troughing operation, openings 17, provided with flaps 16, are available. Apparatus 1 may be secured to the floor, or to other stationary equipment, by means of attachments 18.
Fig. 3 shows a detail of the shaping and netting area, comprising chamber 3, net 4 and the area in which it is accommodated, belt 5', bead 10, and annular space 13 formed between bead 10 and radial section 11, not shown.
~i ycc/sp
Claims (19)
1. A method for drawing substantially flat, resilient conveyor belts through support-roller stations arranged along a conveying path, said support-roller stations defining an eventual operating diameter for the conveyor belts, the method characterized in that, prior to being drawn into the support-roller stations, the conveyor belts are formed into a tubular configuration having a reduced diameter relative to the eventual operating diameter and are maintained by an externally acting force in this state of reduced diameter while being drawn through the support-roller stations.
2. The method according to claim 1, characterized in that the conveyor belts are drawn through the support-roller stations by a traction means which has previously passed through the support-roller stations.
3. The method according to claim 2, characterized in that the externally acting force is provided by the tractive force exerted by the traction means.
4. The method according to any one of claims 1, 2 or 3, characterized in that, after being drawn through the support-roller stations, the conveyor belts are opened into a flat configuration for passing around a return means and, prior to being drawn through return support-roller stations, the conveyor belts are formed into a tubular configuration of a lesser diameter than the eventual operating diameter defined by the return support-roller stations.
5. A method according to claim 1, characterized in that the prior to being formed in the tubular configuration, the surface of the conveyor belt that becomes the outer peripheral surface is coated with a lubricant.
6. An apparatus for forming substantially flat, resilient conveyor belts into a tubular configuration prior to drawing them through a plurality of support-roller stations arranged along a conveying path, said support-roller stations defining an eventual operating diameter for the conveyor belt, the apparatus comprising:
a nozzle-like element having an inlet and an outlet and decreasing in diameter from said inlet to said outlet, said nozzle-like element being adapted to form the conveyor belts into a tubular configuration of lesser diameter than said eventual operating diameter as said conveyor belts are being drawn therethrough;
means for exerting a peripheral force on said conveyor belts for maintaining them in said lesser diameter tubular configuration as they are being drawn through said support-roller stations.
a nozzle-like element having an inlet and an outlet and decreasing in diameter from said inlet to said outlet, said nozzle-like element being adapted to form the conveyor belts into a tubular configuration of lesser diameter than said eventual operating diameter as said conveyor belts are being drawn therethrough;
means for exerting a peripheral force on said conveyor belts for maintaining them in said lesser diameter tubular configuration as they are being drawn through said support-roller stations.
7. An apparatus according to claim 6, wherein said means for exerting a peripheral force on said conveyor belts is an endless net-stocking which is adapted to be drawn onto the exterior of the tubular conveyor belt from within a chamber surrounding the outlet of said nozzle-like element.
8. An apparatus according to claim 6, wherein the nozzle-like element is comprised of two sections divided longitudinally.
9. An apparatus according to claim 8, wherein said sections of said nozzle-like element are adapted to fold open by means of hinges.
10. An apparatus according to claim 6, wherein said nozzle inlet includes a substantially flat portion to match the conveyor belts.
11. An apparatus according to claim 10, wherein said nozzle inlet is open above said flat portion.
12. An apparatus according to claim 7, wherein the outlet of said nozzle-like element is beaded.
13. An apparatus according to claim 12, wherein said chamber is provided with a cover in the area of the outlet of said nozzle-like element.
14. An apparatus according to claim 13, wherein said cover is flared at the outlet of the nozzle-like element and itself forms a nozzle aperture and wherein a radial section of said flared cover bears lightly upon said beaded outlet of the nozzle-like element.
15. An apparatus according to claim 14, wherein the annular passage formed between the radial section and the beaded outlet is adapted to provide a braking effect to said net as the net is being drawn therethrough.
16. An apparatus according to claim 15, wherein intermediate rings may be fitted between the cover and the chamber to accommodate nets of various thicknesses.
17. An apparatus according to claim 7, wherein a plurality of inspection openings are disposed in the nozzle-like element, said openings being closable by means of flaps.
18. An apparatus according to claim 7 or 17, wherein a plurality of inspection openings are disposed on the chamber, said openings being closable by means of flaps.
19. An apparatus according to claim 7, wherein the net stocking on the tubular conveyor belt may be opened thereby relieving the peripheral force acting thereon.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000572883A CA1289501C (en) | 1988-07-22 | 1988-07-22 | Method and apparatus for forming belts to pipe conveyor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000572883A CA1289501C (en) | 1988-07-22 | 1988-07-22 | Method and apparatus for forming belts to pipe conveyor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1289501C true CA1289501C (en) | 1991-09-24 |
Family
ID=4138429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000572883A Expired - Lifetime CA1289501C (en) | 1988-07-22 | 1988-07-22 | Method and apparatus for forming belts to pipe conveyor |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1289501C (en) |
-
1988
- 1988-07-22 CA CA000572883A patent/CA1289501C/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |