CA1070933A - Powder distributor for filling a cable - Google Patents
Powder distributor for filling a cableInfo
- Publication number
- CA1070933A CA1070933A CA296,625A CA296625A CA1070933A CA 1070933 A CA1070933 A CA 1070933A CA 296625 A CA296625 A CA 296625A CA 1070933 A CA1070933 A CA 1070933A
- Authority
- CA
- Canada
- Prior art keywords
- impeller
- powder
- chamber
- tube
- housing
- 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
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/32—Filling or coating with impervious material
- H01B13/321—Filling or coating with impervious material the material being a powder
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electrostatic Spraying Apparatus (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Manufacturing Of Electric Cables (AREA)
Abstract
POWDER DISTRIBUTOR FOR FILLING A CABLE
ABSTRACT
A device for filling the interstices of multi-stranded cable with powder, comprising an outer cylindrical housing and a concentric inner tube with an annular chamber between them. m e tube at one end carries a coaxial impeller located at the outlet end portion of the housing. Powder is fed into the chamber and a helical screw pushes the powder onto the impeller which is rotated to distribute the powder onto conductors passing from a strander around the device and into a closing die.
ABSTRACT
A device for filling the interstices of multi-stranded cable with powder, comprising an outer cylindrical housing and a concentric inner tube with an annular chamber between them. m e tube at one end carries a coaxial impeller located at the outlet end portion of the housing. Powder is fed into the chamber and a helical screw pushes the powder onto the impeller which is rotated to distribute the powder onto conductors passing from a strander around the device and into a closing die.
Description
7~ 3 Thls in~ention relates to the production of multi-stranded electr:1caL cables and more particularly t;o filling the interstices in such cables with powder.
Multi-stranded electrical cables are filled with powder for water blockage. ~ powder fi]ling for this purpose is described in United States Patent No. Ll,002,819 issued January 11, 1977 to Northern Telecom Limited assignee of Leo V. Woyti~. One method of filling the interstices of the cable is by passing the cable core through an electrostatic powder chamber as described in United States Patent No.
4,100,002 issued July ]1, 1978 in the name of l.eo V. Woytiuk assignor to Northern Telecom Limited. Such a method is relatively difficult to operate to obtain fine ad~ustments in the amount of powder filling placed within the interstices of the cable, i.e. the percentage of voids filled by the powder.
It is cm object of the present invention to provide al~
improved method and apparatus for powder filling a multi-stranded cable.
Essentially the invention consists of a device for filling the interstices of multi-stranded cable with powder~ comprising:
a cylindrical housing; a tube concentric with the housing and spaced inwardly therefrom to form an annular chamber having an inlet end and an outlet end, and an aperture opening into the chamber for feeding powder thereto; means positioned within the chamber to move powder along the chamber from the aperture to the outlet end thereof; and an impeller coaxially mounted at the end of the tube and located at the outlet end of the chamber, the impeller being axially rotatab]e, independently of ; 'che powder rnoving means whereby powder moved along the chamber is dispersed laterally from the open end thereof; and a closing die having an inlet end into which a plurality of conductors are fed to form said cable, the housing being coaxially aligned with the die and the impeller being located within the inlet end of the die whereby the conductors entering the die pass through powder distributed laterally by the impeller.
E~ample embodiments of the invention are shown in . ,~ ~, ..
' ~ .
.
. . . . .
~ ~ ' . ' ' , .:
~L51)70~33 ~, .
the accompanying drawings in which:
Figure 1 is a side view in cross-section of a device for powder fi.lling a cablei ~igure 2 is a cross-sectional side view of an alternate `~ embodiment of the de~ice of Figuxe l;
Figure 3 is a cross-sectional side view of another altexnate embodument of the device of Fi.gure l; and , Figure ~ is a cross-sectional side view of yet another alternate embodiment of the device of Fi~ure 1.
~. 10 The example embodiment shown in Figure 1 of the ¦-~ drawings consists of a cable filling device in the form of a ~. . .
~: powder distributor 10 located at the inlet end 11 of a closing ,, die 12. Distributor 10 comprises an outer housing 14 and an ~ inner tube 16 fixed to the outer housing, the tube and housing f forming between them an annular chamber 18. A xotatable helical i j. screw member 20 concentric with tube 16 is located in chamber s 18. That en~ of chamber 18 and housing 14 remote from closing die 12, designated the inlet end 22, has a powder feed aperture 24 opening laterally into the chamber. Outlet end 26 of housing 14, which in the operation of the device is located within i~let ~`~ end 11 of closing die 12, flares outwardly to form a bell mouth 28. A drive shaft 30 extends coaxiall~ through tube 16 which terminates short of outlet end 26 of outer tube 1* and defines ~ an outlet 29 of chamber 18. Drive shaft 30 projects from tube ,: .
16 and carries an impeller 32 located in bell mouth 28 of housing 14. Impeller 32 is frustroconical with spaced ribs or blades 3*
, . .
, on its outer surface~ Helical screw 20 terminates an outlet 29 -of chamber 18 short of impeller 32~ Adjacent inlet en~ 22 of $~ . ~ distributor 10 lies a gear 36 coaxial with housing 14 and meshing,,,. . .
.~ 30 with a drive gear 38. Helical screw 20 is fixed at one end to ~
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gear 36. In this embodiment gear 36 serves to close inlet and 22 of housing 14 and chamber 18. Flxed tube 16 and drive shaft 30 extend through gear 26, drive shaft 30 being driven by suitable drive means 40~
In the operation of the device of Figure 1 conductors 40 are fed from a strander (not shown) into closing die 12 through its inlet 11 to form a stranded cable 42. Distributor 10 is located wi~h.in the circle of conductors as they enter the closing die and is coaxially aligned with the closing die. ~s conductors 40 are fed into closing die 12, powder is fed con- ;
tinuously through conduit 24 into chamber 18 and gear 36 is rotated by drive gear 38 which rotates helical screw 200 Screw : 20 carries the powder forward in chamber 18 to impeller 32.
Impeller 32, rotated by drive shaft 30, throws the powder out :
laterally into closing die 12 around conductors 40 and as the conductors close to form cable 42 the powder is carried by the conductors to fill the intersticies in the cable. Preferably conductors 40 are coated with oil to which the powder adheres.
The device shown in Figure 2 is an alternate embodimen~
~ 20 of the device of Figure 1 and it .is employed in the same manner .. to powder fill a stranded cable. In this alternate embodiment :;.
: tube 16 terminates in an electric motor 50 which drives an .
impeller 52 located coaxially in bell mouth ~8 of housing 14 and having spaced blades 54. Gear 36 is driven as before but tube 16 carries electrical leads 56 for motor 50. The operation of this alternate embodiment is the same device of Figure 1.
In Figure 3 distxibutor 10 is modified to provide another form of impeller driven by shaft 30 as seen in Figure 1.
In this embodiment outlet end 26 of housing 14 is not flared and drive shaft 30 terminates in an impeller 62 which extends ~ outwardly and laterally beyond the outlet end of the outer tube, : - 3 .
~, 1C~7~ 3 the turbine bein~ annularly dished wlth a deflector plate 64 normal to the axis of the dr:ive shaft and with spaced blades 66.
In the operation of the embodiment of Figure 3 powder .
is moved by helical screw 20 along chamber 18 and delivered to impeller 62 which throws it laterally outwardly against conductors 40 within closing die 12.
The example embodiment of Figure 4 shows an impeller . 70 enclosed by housing 14. Impeller 70 is cylindrical and mounted on the end of drive shaft 30 as before, with spaced blades 720 Housing 14 has a closed outlet end 74 with a ri~g of spaced slots 76 opening laterally from the housing in the region of blades 72 of impeller 70. Slots 76 are curved in the direction of rotation of impeller 70 for increased flow of powder.
In the operation of the device of Figure 4 helical screw 20 feeds powder to impeller 72 which throws the powder laterally through slots 76 and against conductors 40 in closing die 40.
It will be appreciated that the shape and orientation of the blades on the impeller of the device are alterable to : .
achieve the purpose of the distributor. .
The centrifugal force applied to the powder by the :
. impeller distributes the powder effectively to the conductors and this is especially important where the conductors are oil ccated or the powder particles are to adhere to the conductors :
; electrostatically~ Also the force imparted to the powder .
~: . .
particles .inhibits them from agglomerating. The powder is :
distributed symmetrically to the conductors and excess powder may be collected at the outlet of the closing die fo:r recycling, : 30 It will also be appreciated that types of mechanism ~,, may be employed Eor clrivin~ impeller 42 other than meshing gears 26 and 23; for exampl.e a woxm and screw, a belt and :
pull~y, or a chain and sprocket~
~.
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Multi-stranded electrical cables are filled with powder for water blockage. ~ powder fi]ling for this purpose is described in United States Patent No. Ll,002,819 issued January 11, 1977 to Northern Telecom Limited assignee of Leo V. Woyti~. One method of filling the interstices of the cable is by passing the cable core through an electrostatic powder chamber as described in United States Patent No.
4,100,002 issued July ]1, 1978 in the name of l.eo V. Woytiuk assignor to Northern Telecom Limited. Such a method is relatively difficult to operate to obtain fine ad~ustments in the amount of powder filling placed within the interstices of the cable, i.e. the percentage of voids filled by the powder.
It is cm object of the present invention to provide al~
improved method and apparatus for powder filling a multi-stranded cable.
Essentially the invention consists of a device for filling the interstices of multi-stranded cable with powder~ comprising:
a cylindrical housing; a tube concentric with the housing and spaced inwardly therefrom to form an annular chamber having an inlet end and an outlet end, and an aperture opening into the chamber for feeding powder thereto; means positioned within the chamber to move powder along the chamber from the aperture to the outlet end thereof; and an impeller coaxially mounted at the end of the tube and located at the outlet end of the chamber, the impeller being axially rotatab]e, independently of ; 'che powder rnoving means whereby powder moved along the chamber is dispersed laterally from the open end thereof; and a closing die having an inlet end into which a plurality of conductors are fed to form said cable, the housing being coaxially aligned with the die and the impeller being located within the inlet end of the die whereby the conductors entering the die pass through powder distributed laterally by the impeller.
E~ample embodiments of the invention are shown in . ,~ ~, ..
' ~ .
.
. . . . .
~ ~ ' . ' ' , .:
~L51)70~33 ~, .
the accompanying drawings in which:
Figure 1 is a side view in cross-section of a device for powder fi.lling a cablei ~igure 2 is a cross-sectional side view of an alternate `~ embodiment of the de~ice of Figuxe l;
Figure 3 is a cross-sectional side view of another altexnate embodument of the device of Fi.gure l; and , Figure ~ is a cross-sectional side view of yet another alternate embodiment of the device of Fi~ure 1.
~. 10 The example embodiment shown in Figure 1 of the ¦-~ drawings consists of a cable filling device in the form of a ~. . .
~: powder distributor 10 located at the inlet end 11 of a closing ,, die 12. Distributor 10 comprises an outer housing 14 and an ~ inner tube 16 fixed to the outer housing, the tube and housing f forming between them an annular chamber 18. A xotatable helical i j. screw member 20 concentric with tube 16 is located in chamber s 18. That en~ of chamber 18 and housing 14 remote from closing die 12, designated the inlet end 22, has a powder feed aperture 24 opening laterally into the chamber. Outlet end 26 of housing 14, which in the operation of the device is located within i~let ~`~ end 11 of closing die 12, flares outwardly to form a bell mouth 28. A drive shaft 30 extends coaxiall~ through tube 16 which terminates short of outlet end 26 of outer tube 1* and defines ~ an outlet 29 of chamber 18. Drive shaft 30 projects from tube ,: .
16 and carries an impeller 32 located in bell mouth 28 of housing 14. Impeller 32 is frustroconical with spaced ribs or blades 3*
, . .
, on its outer surface~ Helical screw 20 terminates an outlet 29 -of chamber 18 short of impeller 32~ Adjacent inlet en~ 22 of $~ . ~ distributor 10 lies a gear 36 coaxial with housing 14 and meshing,,,. . .
.~ 30 with a drive gear 38. Helical screw 20 is fixed at one end to ~
,I,i ' .
.~ . . . .
5~,:
.
~ ~ ' : ' ,,~ . .
~ 7~933 ....
gear 36. In this embodiment gear 36 serves to close inlet and 22 of housing 14 and chamber 18. Flxed tube 16 and drive shaft 30 extend through gear 26, drive shaft 30 being driven by suitable drive means 40~
In the operation of the device of Figure 1 conductors 40 are fed from a strander (not shown) into closing die 12 through its inlet 11 to form a stranded cable 42. Distributor 10 is located wi~h.in the circle of conductors as they enter the closing die and is coaxially aligned with the closing die. ~s conductors 40 are fed into closing die 12, powder is fed con- ;
tinuously through conduit 24 into chamber 18 and gear 36 is rotated by drive gear 38 which rotates helical screw 200 Screw : 20 carries the powder forward in chamber 18 to impeller 32.
Impeller 32, rotated by drive shaft 30, throws the powder out :
laterally into closing die 12 around conductors 40 and as the conductors close to form cable 42 the powder is carried by the conductors to fill the intersticies in the cable. Preferably conductors 40 are coated with oil to which the powder adheres.
The device shown in Figure 2 is an alternate embodimen~
~ 20 of the device of Figure 1 and it .is employed in the same manner .. to powder fill a stranded cable. In this alternate embodiment :;.
: tube 16 terminates in an electric motor 50 which drives an .
impeller 52 located coaxially in bell mouth ~8 of housing 14 and having spaced blades 54. Gear 36 is driven as before but tube 16 carries electrical leads 56 for motor 50. The operation of this alternate embodiment is the same device of Figure 1.
In Figure 3 distxibutor 10 is modified to provide another form of impeller driven by shaft 30 as seen in Figure 1.
In this embodiment outlet end 26 of housing 14 is not flared and drive shaft 30 terminates in an impeller 62 which extends ~ outwardly and laterally beyond the outlet end of the outer tube, : - 3 .
~, 1C~7~ 3 the turbine bein~ annularly dished wlth a deflector plate 64 normal to the axis of the dr:ive shaft and with spaced blades 66.
In the operation of the embodiment of Figure 3 powder .
is moved by helical screw 20 along chamber 18 and delivered to impeller 62 which throws it laterally outwardly against conductors 40 within closing die 12.
The example embodiment of Figure 4 shows an impeller . 70 enclosed by housing 14. Impeller 70 is cylindrical and mounted on the end of drive shaft 30 as before, with spaced blades 720 Housing 14 has a closed outlet end 74 with a ri~g of spaced slots 76 opening laterally from the housing in the region of blades 72 of impeller 70. Slots 76 are curved in the direction of rotation of impeller 70 for increased flow of powder.
In the operation of the device of Figure 4 helical screw 20 feeds powder to impeller 72 which throws the powder laterally through slots 76 and against conductors 40 in closing die 40.
It will be appreciated that the shape and orientation of the blades on the impeller of the device are alterable to : .
achieve the purpose of the distributor. .
The centrifugal force applied to the powder by the :
. impeller distributes the powder effectively to the conductors and this is especially important where the conductors are oil ccated or the powder particles are to adhere to the conductors :
; electrostatically~ Also the force imparted to the powder .
~: . .
particles .inhibits them from agglomerating. The powder is :
distributed symmetrically to the conductors and excess powder may be collected at the outlet of the closing die fo:r recycling, : 30 It will also be appreciated that types of mechanism ~,, may be employed Eor clrivin~ impeller 42 other than meshing gears 26 and 23; for exampl.e a woxm and screw, a belt and :
pull~y, or a chain and sprocket~
~.
. ' ' I ~ .
' I
~ .
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i .
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.; ~
.,., ' . -~
~:, . -. ~ ~
.
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.;. .
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,:
Claims (9)
1. A device for filling the interstices of multi-stranded cable with powder, comprising:
a cylindrical housing;
a tube concentric with the housing and spaced inwardly therefrom to form with the housing an annular chamber having an outlet end, and an aperture opening into the chamber for feeding powder thereto;
means positioned within the chamber to move powder along the chamber from the aperture to the outlet end thereof; and an impeller coaxially mounted adjacent the end of the tube and located at the outlet end of the chamber, the impeller being axially rotatable, independently of movement of the powder moving means, whereby powder moved along the chamber is dispersed laterally from the outlet end thereof; and a closing die having an inlet end into which a plurality of conductors are fed to form said cable, the housing being coaxially aligned with the die and the impeller being located within the inlet end of the die whereby the conductors entering the die pass through powder distributed laterally by the impeller.
a cylindrical housing;
a tube concentric with the housing and spaced inwardly therefrom to form with the housing an annular chamber having an outlet end, and an aperture opening into the chamber for feeding powder thereto;
means positioned within the chamber to move powder along the chamber from the aperture to the outlet end thereof; and an impeller coaxially mounted adjacent the end of the tube and located at the outlet end of the chamber, the impeller being axially rotatable, independently of movement of the powder moving means, whereby powder moved along the chamber is dispersed laterally from the outlet end thereof; and a closing die having an inlet end into which a plurality of conductors are fed to form said cable, the housing being coaxially aligned with the die and the impeller being located within the inlet end of the die whereby the conductors entering the die pass through powder distributed laterally by the impeller.
2. A device as claimed in claim 1 in which the impeller is mounted on the end of a drive shaft which passes axially through the tube, and means to rotate the drive shaft axially.
3. A device as claimed in claim 1 in which the means to move the powder comprises a helical screw concentrically mounted within the chamber, and means to rotate the screw member axially.
4. A device as claimed in claim 1 in which the impeller includes an electric motor mounted on the end of the tube, the electrical leads for the motor passing through the tube.
5. A device as claimed in claim 1 in which the impeller com-prises a frustro-conical member having a plurality of spaced blades extend-ing laterally therefrom.
6. A device as claimed in claim 1 in which the impeller comprises a frustro-conical member having a plurality of spaced blades extending laterally therefrom and a deflector plate normal to the axis thereof.
7. A device as claimed in claim 1 in which the housing is closed about the impeller and has a circumscribing ring of lateral spaced slots opening therethrough adjacent the impeller.
8. A device as claimed in claim 3 in which the means to rotate the screw comprises a gear fixed coaxially to the screw and closing that end of the chamber remote from the outlet end.
9. A device as claimed in claim 8 in which the impeller is mounted on the end of a drive shaft which passes axially through the tube and the gear, and drive means fixed to that end of the drive shaft remote from the impeller.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA296,625A CA1070933A (en) | 1978-02-08 | 1978-02-08 | Powder distributor for filling a cable |
| EP79300184A EP0003672A1 (en) | 1978-02-08 | 1979-02-06 | Powder distributor for filling a cable |
| JP1236279A JPS54114787A (en) | 1978-02-08 | 1979-02-07 | Powder distributor for filling cable |
| ES477561A ES477561A1 (en) | 1978-02-08 | 1979-02-08 | Powder distributor for filling a cable. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA296,625A CA1070933A (en) | 1978-02-08 | 1978-02-08 | Powder distributor for filling a cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070933A true CA1070933A (en) | 1980-02-05 |
Family
ID=4110736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA296,625A Expired CA1070933A (en) | 1978-02-08 | 1978-02-08 | Powder distributor for filling a cable |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0003672A1 (en) |
| JP (1) | JPS54114787A (en) |
| CA (1) | CA1070933A (en) |
| ES (1) | ES477561A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1083793A (en) * | 1978-04-27 | 1980-08-19 | Jorg-Hein Walling | Powder ejection nozzle for strander |
| DE102016014358A1 (en) | 2016-11-24 | 2018-05-24 | Ulf Meyer | Escalator and step for an escalator |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1016008B (en) * | 1953-01-17 | 1957-09-19 | Felten & Guilleaume Carlswerk | Screw press |
| GB1566058A (en) * | 1976-03-31 | 1980-04-30 | Northern Telecom Ltd | Powder filling of cables |
-
1978
- 1978-02-08 CA CA296,625A patent/CA1070933A/en not_active Expired
-
1979
- 1979-02-06 EP EP79300184A patent/EP0003672A1/en not_active Withdrawn
- 1979-02-07 JP JP1236279A patent/JPS54114787A/en active Pending
- 1979-02-08 ES ES477561A patent/ES477561A1/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| EP0003672A1 (en) | 1979-08-22 |
| ES477561A1 (en) | 1980-04-01 |
| JPS54114787A (en) | 1979-09-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |