RU2293016C2 - Heating plate - Google Patents

Abstract

FIELD: manufacture of wooden plates and laminate plastics materials.

SUBSTANCE: plate includes two mutually joined semi-plates having arranged in opposite lengthwise semicircular grooves forming lengthwise opening in plate for introducing longitudinal tubes open at both ends. End portions of longitudinal tubes pass through openings of plugs, they are welded around by two annular seams in each plug and protrude from plugs. Distributing members are welded along contour to plugs at side of open ends of tubes; said distributing members have inner lengthwise and crosswise ducts for distributing heat transfer agent in tubes. End portions of tubes protruding from plugs are introduced into turnings of lengthwise ducts of distributing members. Diameter of lengthwise ducts is equal to inner diameter of lengthwise tubes and diameter of turnings is equal to outer diameter of lengthwise tubes. Butts of semi-plates are welded through on their lateral faces by intermittent seams with possibility of free discharge of heat transfer agent if one of tubes breaks. Semi-plates may be joined one to other by welding or mechanically.

EFFECT: increased useful life period, improved repairing capability of plates.

2 cl, 2 dwg

Description

The invention relates to the production of wood boards and laminate in presses of periodic or continuous action.

Various designs of heating plates are known in which the channels for the passage of the coolant are drilled in the plane of the plate in the longitudinal or transverse direction and are interconnected in a certain sequence by means of jumpers or channels for uniform heating of the plate over the entire plane.

Such plates are expensive to manufacture and require special equipment for drilling deep holes. When the channels are located along the plate, their length exceeds the possibility of drilling an aisle, and such plates are welded from several previously drilled pieces. When drilling channels across the plate, many turns are formed, which affects the passage of the coolant and reduces the longitudinal rigidity of the plate.

Plates with drilled channels are made of simple structural steel and repaired by welding. Their corrosion resistance is low, and repair is possible only for small cracks and dents.

Known heating plate (AS No. 631357) containing the upper, lower and intermediate plates forming inside the chamber for the passage of coolant, however, such a plate can only work with low internal pressure.

The purpose of the invention: reducing the complexity of manufacturing, the possibility of manufacturing on universal metal-cutting equipment, improving the reliability, durability and maintainability of the plates.

This goal is achieved by the fact that the heating plate itself consists of two half-plates, half thickness each. On one side of each half plate there are longitudinal semicircular grooves located uniformly in width with a certain pitch. When folding the half-plates, a split plate is obtained with a series of round holes located in the middle of its thickness. In these holes are placed pipes through which the coolant passes. The coolant pressure is perceived by the walls of the pipes and is not transmitted to the half-plates.

The ends of the pipes on both sides pass through the holes in the plugs and are welded with tight annular seams. Distributors having inside channels for distributing coolant flows through the pipes are hermetically welded to the plugs from the open ends of the pipes.

Half plates are collected by grooves on pipes and pulled together. The distance between the plugs is equal to the length of the half plates, and after assembly, an integral part is obtained. The width and thickness of the plate, plugs and distributors are the same. The side joints between the half plates are left open for the coolant to exit in the event of a pipe break.

Figure 1 and 2 shows the construction of a composite heating plate (figure 2 is a section aa of figure 1). Two half plates 1 are pulled together by bolts 9 or in another way. In the longitudinal openings of the slab formed by the semicircular grooves of the half-plates, pipes 2 are placed open at both ends. The ends of the pipes 2 pass through the holes in the plugs 4 and are welded with two annular seams 3 each to ensure guaranteed tightness. The pitch of the holes in the plug 4 is equal to the pitch of the grooves in the half plate 1.

The ends of the pipes 2 protrude 10-15 mm from the plugs 4 and enter the bores of the longitudinal channels 7 of the distributors 6, while the diameter of the longitudinal channels 7 is equal to the inner and the bores to the outer diameters of the pipe 2. The pitch and number of longitudinal channels 7 are equal to the pitch and number of pipes 2. Between themselves, the longitudinal channels 7 are connected by transverse channels 8, the number and location of which is determined by the flow diagram of the coolant.

Distributors 6 are welded to the plugs 4 from the open ends of the pipes 2 with contour seams 5, which ensure guaranteed joint tightness between the distributor 6 and the plug 4. The coolant is supplied under pressure to the extreme transverse channel 8 of one distributor, and exits from the extreme channel of the other.

To increase the working area of the plate, the joints between the plugs 4 and the half plates 1 on the working surfaces can be welded and processed on a plane. The joints between the half plates 1 at their side ends can be welded only with intermittent seams with the possibility of free exit of the coolant in case of breakthrough of one of the pipes.

To increase the reliability and durability of the plates, the pipes 2 can be made of corrosion-resistant steels.

Repair of damaged pipes 2 is carried out after disconnecting half plates 1.

Claims (2)

1. A heating plate containing two interconnected half-plates having opposite longitudinal semicircular grooves forming longitudinal holes in the plate, into which longitudinal pipes are inserted, the longitudinal pipes being open at both ends, characterized in that the ends of the longitudinal pipes pass through the holes in the plugs, welded with two annular seams in each of them and protrude from them, while to the plugs from the side of the open ends of the pipes along the contour are welded distributors having an internal longitudinal cross and lateral channels for distributing coolant flows through the pipes, the ends of the pipes protruding from the plugs are included in the bores of the longitudinal channels of the distributors, while the diameter of the longitudinal channels is equal to the inner and the bores are equal to the outer diameters of the longitudinal pipes, and the joints between the half-plates at their side ends welded in intermittent seams with the possibility of free exit of the coolant in the event of a breakthrough of one of the pipes. 2. The stove according to claim 1, characterized in that the half-plates are interconnected mechanically or by welding.

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