RU2195060C2 - Drum for reeling electric cables, wires, and the like - Google Patents

Abstract

FIELD: electrical engineering; drums for cables, wires, and the like. SUBSTANCE: drum has webs, neck in-between, and fastenings; novelty is that webs made of plywood sheets are provided with annular slots and necks are assembled of pasted joist annular sectors following slot shape and ends of annular sectors are installed in annular slots of webs. EFFECT: simplified design, facilitated manufacture, reduced material input. 3 dwg

Description

 The invention relates to the field of electricity, in particular to the construction of drums used for winding electric cables, wires and similar products, such as ropes, cables. Known wooden drum for steel ropes, containing two cheeks, in the form of disks, a neck mounted between them and fixed on special circles located on the inner surfaces of the cheeks, and fasteners in the form of studs and bushings. The cheeks of the drum are made in the form of two rows of boards with a thickness of 50-120 mm, and the necks of the drum are drawn from boards with a thickness of 19-50 mm. Drums for ropes for export and reinforced drums are made from softwood lumber, and their cheeks are made of three or four layers of boards.

 The outer layers of the cheeks of the drums and the outer side of the planks should be made of boards with roughness parameters Rmax not more than 1200 microns, and when exported from planed from the outer side of the boards with roughness parameters not more than 500 microns in accordance with GOST 7016-82.

 Boards of cheeks, necks and circles should have parallel sides and fit snugly against each other (wooden drums for steel ropes. Technical conditions. GOST 11127-78. M .: USSR State Committee for Standards, p.2-8). This drum is laborious to manufacture and requires a large consumption of material.

Known closest to the proposed wooden drum for electric cables and wires, containing two cheeks in the form of disks, a neck mounted between them, fixed on special circles located on the inner surfaces, and fasteners (bushings and studs or bolts). The cheeks for drums 5-206 should consist of two layers, for drums 25 and above - of three and four layers, while the boards of one layer should be located at right angles to the boards of the adjacent layer, and of three layers - at an angle of 60 ^o . The boards are connected by nails.

 It is allowed for drums 5-8a to make cheeks from glued plywood of the FC brand, for the outer layers not lower than grade BB / s, for inner layers not lower than grade C / C according to GOST 3916-69. The number of layers must be at least three.

 Circles for attaching the neck consist of a continuous row of boards or individual segments and are nailed to the inner surface of the cheeks to their entire thickness (the ends of the nails are bent).

 The connecting studs are arranged in a concentric circle relative to the axis of the drum at the same distance from each other (Wooden drums for electric cables and wires. Technical conditions. GOST 5151-79. Official publication E. M.: USSR State Committee for Standards. Prototype).

 This drum is also laborious to manufacture, requires the adjustment and processing of boards and a large consumption of material.

The present invention solves the problem of simplifying the design, reducing the complexity of manufacturing and reducing the consumption of materials. To achieve this technical result, circular grooves are made in the drum for winding electric cables, wires and similar products containing cheeks in the form of disks, a neck installed between the cheeks, and fastening elements in the cheeks made of sheet plywood, and the neck is assembled from bent glued annular sectors in the form of a groove, and the ends of the annular sectors are installed in the circular grooves of the cheeks. The drawings show:
figure 1 - General view of the drum,
figure 2 is a view of the annular sector,
figure 3 is a section of the cheek.

 The drum for winding electric cables of wires and similar products contains cheeks 1 in the form of disks, a neck 2 mounted between the cheeks 1, and fasteners 3. As fasteners 3, studs or bolts are used.

 The cheeks 1 are made of sheet plywood, for example, FC brand, and are equipped with circular grooves 4.

 The neck 2 is assembled from bent glued annular sectors 5 forming a hollow cylinder. In FIG. 1, 2, a neck of three annular sectors for drums 8, 8a, 8c (a possible and different number of sectors) is shown. Sectors made of peeled veneer. Both hardwood and coniferous, as well as mixed, are used for their manufacture.

 For the manufacture of the annular sector 5, all the necessary veneer layers are selected and chopped to the size of the sector blank, the sector blank package is assembled with the inner layers of veneer coated with glue based on urea resins, and then the blank package is pressed in bent glued molds by hot pressing with a certain mode.

 After cooling, the workpiece is trimmed to the final size of sector 5. The finished sectors 5 are inserted into the grooves 4 of the cheeks 1 and pulled together by fastening elements - with studs 3 located in a concentric circle relative to the axis of the drum at the same distance from each other.

 The proposed drum is intended to be used both in the domestic and foreign markets. The tests confirmed its strength and reliability.

Claims (1)

 A drum for winding electric cables, wires and similar products, containing cheeks in the form of disks, a neck mounted between them, and fastening elements tightening the cheeks, characterized in that in the cheeks made of sheet plywood, circular grooves are made on the inside of them, the neck of the drum is assembled from annular bent glued sectors in the shape of a groove, and their ends are installed in these grooves.

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