FI69537C - WHEELS ARE REFERRED TO A REFLECTOR - Google Patents

Description

1 69537

Hanger for insulated overhead conductors

The invention relates to a hanger for galvanic connection with a conductive conductor of an open conductor insulated with a thin plastic layer to prevent the arc conductor damaging effect of a phase current between it and some other component of the conductor, comprising a body, an associated suspension loop and means for locking the conductor with respect to the hanger.

10 Conductors coated with a thin layer of insulating material and overhead lines formed therefrom and the reasons for their use are described in FI patents 53 373 and 53 526. Although such conductors with thin insulation have several advantages, they also have some problems which do not occur with bare open conductor structures. One such is that, for example, arcs generated by climatic over-voltages between phase conductors cannot pass along the conductors but remain burned in place at their point of ignition, i.e. generally where the insulation is damaged or removed for some reason, e.g. In this case, the conductor burns very quickly under the influence of the arc. To prevent this phenomenon, arc damage devices are installed in insulated overhead lines with a massive part to which the melting effect of the light-25 is directed.

In order to avoid the installation of separate arc damage prevention devices on overhead line sections using hangers, a hanger according to the invention is formed, characterized in that at least 30 other ends of the body have a massively substantially spherical or substantially spherical part surrounding the end of the conductor mounting groove. spherical whole.

In the following, a more detailed structure of the hanger according to the invention will be described with reference to exemplary embodiments with reference to the accompanying drawing, in which Fig. 1 shows a hanger according to the invention mounted on a straight conductor and corners, 2,69537 Fig. 2 shows a top view of the hanger of Fig. 1; end view, Figure 4 shows a sectional view of the hanger AA of Fig 1, 5 Figure 5 shows a top view of the hanger of Figure 1 the lower part of the side, Figure 6 shows an installed cable end of the hanger according to the invention kiristyspaloineen, Figure 7 shows a line head according to Figure 6, 10 for mounting the hanger as seen from the direction of the arrow in Figure 6 VII, the direction of the arrow 8 shows a view of the hanger of Figure 6 from the direction VIII of Figure 6, and Figure 9 shows the hanger of Figure 6 tyspalan 15-tightening mounting.

Figure 1 shows a partial section of a hanger for a straight cable section or cable corners. The hanger of Fig. 1 consists of an upper part 1 and a lower part 2, between which a wire 3 is clamped. The hanger is connected to the support hook 20 by an upturned U-shaped handle 4, which at the same time binds the body parts 1 and 2 together. The ends of the bracket are threaded and are fitted with washers 5 and 6 and nuts 7 and 8, by means of which the hanger parts 1 and 2 and the cable 3 between them can be pressed against the abutments 9 fitted to the bracket 4. Nuts threaded to the bottom of the threads of the handle branches can also be used as stops. As can be seen from Fig. 1, the conductor 3 consists of a metallic conductor 10 and a thin layer of insulating material 11 removed from the area against the upper body portion 130. In order for the hanger according to Fig. 1 to also successfully act as an arc damage prevention device, massive outwardly bulging portions 12 and 13 are formed at the ends of both body parts. Thus, a possible inter-phase arc ignites between the respective massive parts and the arc melting effect is applied to the conductor. As seen in Figure 1, is

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3 69537 widened outlets of the conductor 3 between the body parts 1 and 2 on the one hand to allow angular installation and on the other hand so that the stripped part of the conductor insulation 11 does not in any case extend beyond the bulges 12 and 13, thus creating a risk of arcing this exposed conductor and e.g. between the adjacent stage hanger. The passage groove of the conductor 3 between the body parts 1 and 2 is made slightly wavy in order to prevent the axial displacement of the conductor with respect to the hanger with certainty 10.

Figure 2 shows a top view of the hanger according to Figure 1. It can be seen from Figure 2 that the bulges 12 and 13 also protrude laterally from the body parts 1 and 2. Fig. 3 is seen from the end of the hanger of Fig. 1, whereby an expansion of the bulges 12 and 13 formed by the substantially spherical assembly surrounding the insertion opening of the conductor 3 is observed.

Fig. 4 shows a section of the hanger according to Fig. 1 along the line A-A in Fig. 1. In Fig. 4, the hanger 20 is shown assembled and the conductor 3 placed in the mounting groove. In the embodiment of Figure 4, the bores of the body part 1 for the bracket 4 are made so tight that the body part 1 remains in place after the fit against the stop 9. As previously mentioned, the bracket 4 could be threaded 25 to the stop 9, whereby the stop 9 could be replaced by a nut. The fitting of the body part 2 with respect to the bracket 4 is made so loose that even a thinner conductor than shown in Fig. 4 can be placed in the conductor groove. As can be seen from Fig. 4, the conductor is stripped only from above 30, i.e. against its part against the body part 1. This makes it easier and faster to install the wire in the hanger.

Fig. 5 shows the lower body part 2 of the hanger, in which a conductor mounting groove 14 is made. In order to make the corrugated groove 14 with a profile according to Fig. 1 suitable for separate conductor diameters, it is made variable in width as shown in Fig. 5.

4,69537

Figure 6 shows a hanger, i.e. an end holder, to be mounted on the end of a conductor according to the invention. It has a unitary trough-like body 20 in which the conductor is mounted. The body 20 is integrally formed with cor-5 recesses 23 for hanging on the end post. Massive bulges 21 and 22 are formed around the ends of the conductor chute 24 of the body 20 to allow the end holder to function as an arc damage prevention device. Below the body 20, a loop 10 25 is also integrally formed with it for attaching the pulley used to tighten the conductor. The bottom of the conductor chute 24 is corrugated in part along its length to provide a secure locking of the conductor to the terminal holder. The part 27 of the locking piece 26 coming into the cable tray against the cable has a corresponding corrugated profile. 15 Figure 7 shows the direction of arrow terminal holder of Figure 6 as seen from the direction VII of Figure 6. It can be seen from Figure 7 that the bulges 21 and 22 also extend laterally.

In Figure 6 the terminal holder according to Figure 8 is illustrated as seen from the direction of the arrow VIII of Figure 6, the direction in which the clamping piece 20 is seen conduit pipe 26 of the conductor 27 against the projection 24 penetrates into the curved shape of the bulge 22 and the substantially spherical shape of the portion of finish.

Figure 9 shows the attachment of the clamping piece 26 to the body 20. The body 20 is provided with lugs 28, 29 projecting through different bores and axially spaced sides of the guide chute 24, through which through-holes 30 and 31 are made and threaded. A clamp 26 (not shown) is attached to the lower lug 29 by a bolt (which is shown) which can rotate about the axis 30 of the mounting hole 31 and also to a position where it leaves the conductor mounting chute free. Thus, the clamping piece may be pre-attached to the frame when the hanger is installed. Once the conductor has been inserted into its mounting chute, the clamping piece 26 is rotated about the axis of the hole 31 so that the part of the clamping piece 27 35 falls into the conductor chute against the conductor. In this case, the open grit-like lug 32 forming the second attachment point of the tightening piece 26 can be inserted into the hole 30 under the base of the threaded bolt (not shown). The tightening piece is then tightened by tightening the bolts to lock the conductor in place relative to the body 20.

In the embodiments of the hanger shown in Figures 1 and 6, massive bulges are formed at both ends of the body, but in some cases only one bulg may be sufficient.

Claims (1)

A hanger for mounting in a galvanic connection with an overhead conductor (3) insulated with a thin layer of plastic to prevent damaging the arc conductor (3) supplied by the phase current between it and another component of the conductor, comprising a body (1, 2; 20), an associated suspension loop ; 23) and means (7, 8; 26) for locking the conductor (3) relative to the hanger, characterized in that at least one end of the body (1, 2; 20) has a massive portion () surrounding the end of the conductor groove (3) on substantially all sides 12, 13; 21) which is substantially spherical in shape (21, 22) or forms a substantially spherical assembly (12, 13) when installed. il