FR2580260A1 - STACK OF INSULATOR CHAINS - Google Patents

Abstract

THE INVENTION CONCERNS A CUBIC STACKING OF INSULATOR CHANNELS 11, THE AXES OF WHICH ARE PARALLEL AND WHOSE CUPS 11A ARE ARRANGED BETWEEN THOSE OF THE ADJACENT INSULATOR CHANNELS 11, AND THE PLATES 12 INTERPOSED BETWEEN THE HORIZONTAL ROWS OF INSULATOR CHANNELS 11 TO COMBINE THE SHAPE OF THE CUP 11A OF THESE LATEST. THE TRAYS 12 MAY BE MADE OF A MATERIAL CAPABLE OF DEFORMING ON CONTACT WITH THE CUPS 11A, WHEN THE INSULATOR CHAINS 11 ARE ARRANGED ON THE PLATE HORIZONTALLY COVERING THE INSULATOR CHANNELS PLACED IMMEDIATELY BELOW, OR THE PLATES ARE PLACED HORIZONTALLY PROVIDED WITH HOLLOWS AND PROJECTING PARTS SHAPING THE SHAPE OF INSULATOR CHAIN CUPS, BEFORE BEING PLACED ON THESE. THE CONSTITUENT MATERIAL OF THE TRAYS 12 MAY BE A PLASTIC MATERIAL, DISSOLVED RECOVERY PAPER, A METAL MESH WITH A COATING, ETC ... IN ADDITION, THE STACKING OF INSULATOR CHAIN 11 MAY BE WRAPPED WITH A FILM RETRACTABLE 16.

Description

Stacking insulator strings

  The present invention relates to a stack of chains of isola-

  teurs for the storage and the transport of these.

  It is known to stack chains of insulators in the following manner, illustrated by FIGS. 1 and 2 for storing and transporting them. Several chains of insulators 1 are arranged in a cube or in a three-dimensional shape so that their axes lc are parallel to each other and that their cups la are placed between cups

  chains of adjacent insulators 1. Bars 2 are arranged parallel

  along the axes lc of the chains of insulators 1, at the vertices of isosceles right triangles each of which has a base which constitutes

  a connecting line between the centers of two chains of insulators adjja-

  centes. Each of the outermost bars 2a is connected to

  at least one bar 2 located in the same plane by means of connecting elements

  sound 3, such as bands, wires, metal cables or the like. Reference number 4 designates a pallet intended to support all of the stacked chains of insulators and comprising bars 2b of triangular sections. Publication of model request

  Japanese Utility No. 25 489/75 describes such a stack of chains of i

solators.

  But, with chains of insulators thus stacked, it is necessary that

  the bars 2 have a substantial thickness and that metal strips

  ques 3, proportionate to these are used as linking elements

  sound because the insulator strings are extremely heavy. The stack of insulator chains therefore becomes bulky due to the thickness of the bars. In addition, as the insulator strings 1 are placed on the

  bars 2 without being retained in the axial direction, they risk inadvertently

  tance, to move in the axial direction so that they will come into mutual contact and collide, which will cause scratches on

  their surfaces during stacking, de-stacking and transport.

  In addition, if the connecting elements 3 are steel bands arranged in a loop and connecting the outermost bars 2a to the internal bars 2-1 and 2-2, located for example between the chains

  insulators 1-2 and 1-3 respectively and 1-1, as shown diagrammatically

  Only in Figure 3, the insulator strings should be stacked in the order 1-1, 1-2, 1-3, 1-4 and 1-5 because if the bars 2-1 and 2-2 n 'were not subjected to the load of the insulator strings, the external insulator strings 1-4 and 1-5 could fall. When unstacking the insulator shafts thus stacked, they must be removed in the order 1-5, 1-4, 1-3, 1-2 and 1-1. Consequently, the stacking and unstacking of the insulator chains is tedious and, moreover, their stacking requires a large number of parts, which makes it difficult to

  preparation, management and operation of iso-chain stacks

  readers. One of the main aims of the present invention is to propose a stack of insulator chains which eliminates all the drawbacks

  of the prior art and which, to do this, is of a reduced volume compared to

  port to that of the prior art, easy to stack and unstack and reliable in terms of safety by preventing the chains of insulators from

  come into mutual contact and collide and reduce considerably

  incredibly the number of pieces required to stack the chains of isola-

  teurs. In order to achieve this goal, a stack of insulator chains

  according to the present invention comprises several chains of insulators

  placed in a cube, the axes of which are parallel to each other and the cups of which are arranged between cups of adjacent insulator chains, and plates respectively interposed between two horizontal rows of insulator chains, to match the shape of the cups

said insulator strings.

  The trays can be made of a material capable of loosening

  form in contact with the cups of the insulator chains, when the

  insulator strings are arranged in a horizontal row on the plate

  sheet horizontally covering the chains of insulators placed immediately

  under it, or the trays are previously provided with recesses

  and projecting parts conforming to the shape of the cups of the chains of iso-

  readers, before being placed on the chains of insulators in horizontal rows. Preferably, each plate is provided with a reinforcement on

  its periphery. A stack of insulator posts is preferably

wrapped in shrink film.

  The trays can be made of plastic, dissolved scrap paper, or a metal mesh such as expanded metal.

  In order to facilitate understanding of this invention

  tion, preferred embodiments will be described by way of non-limiting examples, with reference to the accompanying drawings in which: - Figure 1 is a perspective view of a stack of chains of insulators of the prior art; - Figure 2 is an enlarged schematic front view of part of the stack of insulator chains shown in Figure 1;

  - Figure 3 is a schematic view intended to explain the-

  dre stacking insulator rods according to the prior art; - Figure 4 is a perspective view illustrating chains of insulators about to be installed on a plate already covering chains of insulators arranged according to the invention; - Figure 5 is a perspective view illustrating chains of insulators arranged on the plate covering the chains of insulators

  located below, so that the plate is deformed to

  the shape of the cups of the upper and lower insulator chains

  laughing, according to the invention; - Figure 6 is a schematic view illustrating the deformed plate, along the line VI-VI of Figure 5; - Figure 7 is a schematic view similar to Figure 6, but taken along line VII-VII of Figure 5; - Figure 8 is a perspective view illustrating chains of insulators stacked according to the invention; - Figure 9 is a perspective view illustrating a plate according to the invention intended to be interposed between chains of insulators; and - Figure 10 is a perspective view illustrating an expanded metal tray according to the invention intended to be interposed between

insulator chains.

  In a cubic stack of several chains of insulators 11, in which the axes of the latter are parallel to each other

  and their cups 11a are placed between cups of the chains of iso-

  lators 11 adjacent, a plate 12 provided with recesses and projecting parts conforming to the shape of the cups 11a of the insulator sleeves 11 is, according to the invention, interposed between two horizontal rows of

  insulator sleeves, as shown in Figures 4 and 5.

  The material from which the plate 12 is made is a metallic mesh.

  that, a plastic material, molded pulp, or equivalent. In addition, the tray can be provided with a reinforcement 14 on its outer periphery.

  to improve its mechanical strength.

  The recesses and the protrusions are formed on a plate when chains of insulators are arranged in a horizontal plane

  on the plate which horizontally covers the chains of insulators

  created in the horizontal plane located immediately below the first horizontal plane mentioned. In section, the hollows and the projecting parts have a configuration in the form of a sinusoidal wave, as shown in FIG. 6 along the line VI-VI of FIG. 5, and in the form of teeth of

  saw, as shown in Figure 7 along line VII-VII of Figure 5.

Example I

  Trays 12 of dissolved recovery paper were pour-

  seen from hollows and projecting parts, as illustrated in FIG. 9, to conform to the shape of the insulator chain cups intended for

  be stacked as follows.

  Several insulator rods 11 were placed in several horizontal planes, interposing between them in corresponding horizontal planes, the plates formed as described above so that the axes of the insulator chains are parallel to each other, that the axes horizontally and vertically adjacent chains of insulators are directed in opposite directions to each other and that the cups of each of the insulator rods are placed between the

  cups of insulator chains horizontally and vertically adjacent

  centes, as illustrated in figure 8. A pallet 15 was previously-

  ment arranged under the lower strings of insulators. The

  chains of insulators thus stacked were wrapped in shrink film

  table 16 shown in dotted lines in FIG. 8.

  The total volume of the stack of insulator strings was

3 3 3

  1.55 m3, which was 0.3 m less than the 1.85 m3 of the stack-

  prior art. The stacking and de-stacking operations were easier than in the prior art.

Example II

  This example is substantially identical to Example I except

  plates. The trays were made of wire mesh made of

  made up of wires 1 mm in diameter and covered with a plastic coating 1 mm thick. These trays were formed so as to have corrugated surfaces conforming to the shape of the chains' cups.

insulators to stack.

Example III

  This example is substantially identical to Example I with the exception of the plates. The trays were made of expanded metal and shaped to the required shapes using forming dies and a press. Upper and lower forming dies were made which were provided with projecting parts corresponding to insulator chain cups intended to be arranged in the same manner as in Example I. These upper and lower forming dies were been attached to

  upper and lower die dies to press plates

expanded metal sheets.

  The upper and lower matrices preferably had a

  circumferential shape comprising flat parts to provide the plates

  flat edges for the treatment of the edges of the plates after

  forming. After pressing, the trays were deburred.

  To avoid scratching the glass surfaces of the iso- chains

  Readers with the metal trays, the expanded metal trays were coated with polyethylene using the fluidized bed coating method. The thickness of the coating was of the order of 0.5 mm. Wooden bars of trapezoidal sections were nailed on both sides of the edges of the plates to form the reinforcements of the plates. The edges of the trays extending beyond the wooden frames have been folded

  at right angles to the planes of the plates, to prevent these

  hard do come off the wooden frames.

  Preferably, the expanded metal trays have been previously flattened by rollers so that a coating of material is obtained.

  uniform plastic with good properties.

Example IV

  Trays were made of plastic molded by injection into dies. The trays were provided on their peripheries with pentagonal hollow cylinders formed in one piece with the trays by injection molding, and polygonal wooden bars were inserted in the hollow cylinders in which they were held in place using nails. The material for making the trays was

  polyethylene and the thickness of the trays was about 5 mm.

Example V

  Trays were made from molded pulp using ma-

  and a thermoforming machine. The thickness of the plates was approximately 5 mm. Wooden bars of trapezoidal sections were nailed on both sides of the edges of the plates to form the reinforcements of the plates. In this case, the strength of the assembly between the plates and the wood being sufficiently high, it was not necessary to fold

the edges of the trays.

  In order to avoid direct contact with the insulator chains, folded corrugated cardboard plates have been inserted between the chains

  insulators. We put a wooden frame on the chains of isola-

  stacked to prevent them from coming into contact with other objects.

  However, the tray formed can be used as described above in

place of this frame.

  Since the tray of this Example had resistance

  tance, the packaging of the stacked insulator rods could be

  achieved by a simple overlap. The simple wooden frame or mor-

  corrugated cardboard was applied to the string insulators

  together with the packaging consisting of a shrink film and

  packaging carried out using steel strips.

  Those skilled in the art will understand that the above description relates to

  relates to preferred embodiments of the stack according to the present invention and that different variants and modifications can be made therein

  made without departing from the scope of the invention.

Claims (8)

  1. Stack of insulator rods, characterized in that it comprises several chains of insulators (11) arranged in a cube, the axes of which are parallel to each other and the cups (11la) of which are arranged between the cups of chains of adjacent insulators (11), and plates (12) respectively interposed between two horizontal rows   insulator chains (11) to match the shape of the cups (11a) of the say insulator posts.   2. Stack of insulator rods according to claim 1, characterized in that said plates are made of a material capable of deforming in contact with the cups (11a) of the insulator rods (11), when said rods of insulators are arranged in a horizontal row on the plate (12) horizontally covering the chains   insulators (11) placed immediately below it.   3. Stack of insulator chains according to claim 1, characterized in that said plates (12) are previously provided with recesses and projecting parts matching the shape of the cups (11a) of the   insulator hinges (11), before being placed on the isolating rods teurs in horizontal rows.   4. Stacking insulator strings according to any one of   Claims 1 to 3, characterized in that each of said plates (12)   is provided with a reinforcement (14) around its periphery.   5. Stacking of chains of insulators according to any one of   Claims 1 to 4, characterized in that said plates (12) are made of plastic.   6. Stacking of chains of insulators according to any one   claims 1 to 4, characterized in that said plates (12) are   made of dissolved scrap paper.   7. Stacking of chains; insulators according to any one of   Claims 1 to 4, characterized in that said plates (12) are   made of a wire mesh, such as an expanded metal mesh.   8. Stack of insulator chains according to any one   claims 1 to 7, characterized in that said stack is   wrapped in shrink film (16).