SE445864B

SE445864B - SET OF POWDER FILLING OF A CABLES CONTAINING A MULTIPLE CONDUCTOR AND DEVICE FOR IMPLEMENTATION OF THE SET

Info

Publication number: SE445864B
Application number: SE7905457A
Authority: SE
Inventors: J N Garner; A S Hayes
Original assignee: Northern Telecom Ltd
Priority date: 1978-06-28
Filing date: 1979-06-20
Publication date: 1986-07-21
Also published as: DE2925931A1; CH636726A5; IT1121397B; ES481973A1; IT7923575A0; BR7903808A; FI71628B; FI791920A; SE7905457L; NO792146L; BE877345A; AU4789479A; GB2024278B; NL7904959A; CA1072729A; FI71628C; GB2024278A; FR2430072A1; JPS556594A; FR2430072B1

Description

790545745 anordning för fyllning av två kablar. 790545745 device for filling two cables.

Såsom illustreras i figur 1 innefattar anordningen en huvudbox eller ett hus 10 med ett övre parti ll, en luftbox 12 vid botten, ett luftinlopp 13, en dammutträdesöppning vid 14 och ett pulverinlopp vid 15. Vid en inloppsände hos huset 10 finns en inloppsmatris 16 och vid boxens andra ände finns en utloppsmatris 17. Luftboxen 12 är separerad från huvuddelen av huset 10 medelst en porös platta 18.As illustrated in Figure 1, the device comprises a main box or housing 10 with an upper portion 11, an air box 12 at the bottom, an air inlet 13, a dust outlet opening at 14 and a powder inlet at 15. At an inlet end of the housing 10 there is an inlet die 16 and at the other end of the box there is an outlet matrix 17. The air box 12 is separated from the main part of the housing 10 by means of a porous plate 18.

Vid användning av anordningen fylles huset 10 med pul- ver via inloppet 15 och tillföres tryckluft till luftboxen via luftinloppet 13. Luften passerar genom den porösa plattan 18 och fluidiserar pulvret i huset 10, såsom indikeras vid 19.When using the device, the housing 10 is filled with powder via the inlet 15 and compressed air is supplied to the air box via the air inlet 13. The air passes through the porous plate 18 and fluidizes the powder in the housing 10, as indicated at 19.

En viss mängd damm erhålles och detta avgår genom dammutloppet 14.A certain amount of dust is obtained and this exits through the dust outlet 14.

Innan boxen fylles med pulver matas ledarna i en kabel genom inlopps- och utloppsmatriserna 16 och 17. Som illustreras i figur 1 passerar ledarna 20 i kabeln genom en förformnings- styrning 21 och formas sedan till en kabel, då de passerar in- loppsmatrisen 16. En första längd av de formade ledarna matas genom huset 10 och ut genom utloppsmatrisen 17. De formade le- darna kan sedan anbringas vid ett lämpligt organ för förbind- ning med en dragnings- och upptagningsmekanism.Before the box is filled with powder, the conductors in a cable are fed through the inlet and outlet matrices 16 and 17. As illustrated in Figure 1, the conductors 20 in the cable pass through a preform guide 21 and are then formed into a cable as they pass the inlet die 16. A first length of the shaped conductors is fed through the housing 10 and out through the outlet die 17. The shaped conductors can then be attached to a suitable means for connection to a pulling and receiving mechanism.

Så snart ledarna har passerat huset kan det tillslutas, pulver inmatas och fluidiserande luft tillkopplas. Ledarna drages sedan genom huset. Då ledarna utträder ur huset genom matrisen 17 innesluts de av ett kärnmantlingsband 25 medelst en formerare 26. I det visade exemplet innefattar formeraren 26 ett avsmalnande eller koniskt inträdesparti 27 och ett parallellt parti 28. Formeraren formar eller lindar mantlings- bandet 25 runt ledarna 20 för att förhindra förlust av fyll- ningsmediet.As soon as the conductors have passed the housing, it can be closed, powder fed and fluidizing air connected. The conductors are then routed through the house. As the conductors exit the housing through the die 17, they are enclosed by a core sheath band 25 by means of a former 26. In the example shown, the former 26 includes a tapered or conical entry portion 27 and a parallel portion 28. The former forms or coils the sheath band 25 around the conductors 20 for to prevent loss of the filling medium.

Ledarna 20 kan utgöras av separata, individuella ledare eller kan för telekommunikationskablar innefatta par av tvin- nade ledare. Ledarna matas in i huset 10 via inloppsmatrisen 16 i ett väsentligen slutet tillstånd. Vissa mindre avstånd kan förekomma mellan ledarna, exempelvis till följd av en liten öppning av ledarna efter utträde ur inloppsmatrisen 16, 7905457-3 men en sådan öppning är alltid minimal. Det inbördes avståndet mellan ledarna kan varieras, exempelvis genom att något varie- ra hålet i inloppsmatrisen 16, för att variera fyllningsmäng- den. Överraskande erhållas, fastän ledarna befinner sig i ett väsentligen slutet tillstånd och vanligen är anordnade i flera skikt, en likformig och fullständig fyllning av kablar även innefattande ett relativt stort antal ledare. Exempelvis er- hålles tillfredsställande fyllning av en kabelenhet innefattan- de 50 ledarpar. Ledarnas passage genom huset 10 illustreras i figur 2.The conductors 20 may consist of separate, individual conductors or may for telecommunication cables comprise pairs of twisted conductors. The conductors are fed into the housing 10 via the inlet die 16 in a substantially closed condition. Some smaller distances may occur between the conductors, for example due to a small opening of the conductors after exiting the inlet matrix 16, but such an opening is always minimal. The mutual distance between the conductors can be varied, for example by slightly varying the hole in the inlet matrix 16, in order to vary the amount of filling. Surprisingly, although the conductors are in a substantially closed state and are usually arranged in several layers, a uniform and complete filling of cables also comprising a relatively large number of conductors is obtained. For example, satisfactory filling of a cable unit comprising 50 pairs of conductors is obtained. The passage of the conductors through the housing 10 is illustrated in Figure 2.

Figur 3 illustrerar en typisk anordning för fyllning av två kabelkärnor, vilka i det speciella fallet vardera innefat- tar 25 ledarpar. Två boxar 10 är belägna sida vid sida och för- sedda med en gemensam pulvertillförselledning 40. I det illust- rerade exemplet är roterande oscillerande plattor 41 anordnade vid inloppsmunstyckena för att skaka eller oscillera ledarna, då de passerar genom boxarna. Pulvertillförseln kontrolleras för bibehållande av en väsentligen konstant bäddtjocklek. Vid ett ej visat alternativt arrangemang kan ett flertal kabelkärnor passera genom en gemensam bädd.Figure 3 illustrates a typical device for filling two cable cores, which in the special case each comprise 25 conductor pairs. Two boxes 10 are located side by side and provided with a common powder supply line 40. In the illustrated example, rotating oscillating plates 41 are arranged at the inlet nozzles for shaking or oscillating the conductors as they pass through the boxes. The powder supply is controlled to maintain a substantially constant bed thickness. In an alternative arrangement not shown, a plurality of cable cores can pass through a common bed.

Anordningen är förhållandevis billig, enkel och mycket effektiv. Förfarandet resulterar i likformigt fyllda kabel- kärnor, vilken fyllning kan styras och varieras enligt önskan.The device is relatively inexpensive, simple and very efficient. The process results in uniformly filled cable cores, which filling can be controlled and varied as desired.

Kabeln får därvid likformiga elektriska karakteristikor.The cable thereby acquires uniform electrical characteristics.

Claims

7905457-3 Patent claims

1. When powder filling a cable core containing a plurality of conductors, characterized in that the conductors in the core are brought into positions close to each other and that the core in this substantially closed state may pass through a fluidized bed of filling powder completely below the surface of the bed, and that the conductors are caused to oscillate by means of means arranged in front of the bed during their passage through said bed, whereby the filling powder will pass in between the conductors and completely fill the cavities in the core.

2. A method according to claim 1, characterized in that the core (20) is wrapped with a band (25) on the exit from the fluidized bed (19).

3. A method according to claim 1 or 2, characterized in that powder is supplied to the fluidized bed (19) at a rate which maintains a substantially constant bed thickness.

Device for powder filling of a cable containing a plurality of conductors, comprising a housing with a bottom and inlet and outlet ends, characterized by at least one inlet (16) at the inlet end of the housing (10) for insertion of a cable core with a plurality of conductors. (20), which inlet (16) has such a dimension that the core is maintained in a substantially closed state, an outlet (17) at the outlet end of the housing (10) for the exit of the cable core in a closed state, a porous element (18) at the bottom of the housing (10), means (13) for supplying air through the porous element (18) to provide a fluidized bed of filling powder introduced into the housing (10) with such a height that the cable core during its passage through the housing is completely surrounded by the powder in the bed, and oscillating means (41) at the inlet (16) for causing the conductors (20) to oscillate as they pass through the housing (10).

Device according to claim 4, characterized by an air box (12) arranged at the bottom of the housing (10), that said means for supplying air comprises air supply means (13) to said air box, and that the porous element (19) extends between the air box (12) and the housing (10).

Device according to claim 4 or 5, characterized in that the housing (10) is provided with an upper portion (11) and that dust discharge means (14) are connected to said portion (11).

Device according to any one of claims 4-6, characterized in that it comprises wrapping means (26, 27, 28) adjacent to the outlet (17) for winding a band (25) around the core (20) at the exit through the outlet.

Device according to any one of claims 4-7, characterized by a preforming member (21) arranged in front of the inlet (16) for preforming the conductors (20) before insertion thereof.