FI109831B - Dryer installation for stacked sawmill timber, includes supports which can be raised to same level as timber stack conveyors - Google Patents

Abstract

At least one support (3) extends substantially in the direction of the timber stack conveyors (1) in the floor of the dryer installation and over the entire conveyor length, at a distance from the latter. The support has a drive mechanism for raising it to substantially the same level as the conveyors or lowering it beneath this level.

Description

1 109831

Wood kiln

The present invention relates to a kiln for timber.

5 In this context, timber is primarily sawn timber. The lumber is stacked in your usual interleaved stacks, which are moved to an air-conditioned space for drying. The air-conditioned space is a drying room, which can be a one-time chamber drying plant or a flow-through duct dryer. In such a drying room, a suitable flow of 10 actual air is maintained to dry the timber.

The timber is fed into these drying rooms in the form of said interleaved stacks. In order to facilitate and / or facilitate the transfer of the stacks in the drying room, the floor of the dryer is conventionally provided with suitable transfer paths. In a chamber dryer, the drying space is filled with one or more drying stacks, the space is closed and the drying process is initiated. Stacks are in the dryer throughout the drying cycle. In a channel dryer, the stacks are periodically fed to one end of the channel and removed at the opposite end. The feed is sequenced in a stack way! 20 orderable lead time. The transit time is of the order of one year. '; rokausi. Between feed cycles, the stacks are stationary in the duct.

; ; For example, a conveyor track in a drying room may consist of a roller row over which a gutter is placed. The length of the gutter bar corresponds essentially to the length of •: ”: 25 stacks of wadding. The width of the stack, which is dimensioned to be 'compatible with' the width of the drying room, is usually several meters. Parallel; the conveyor tracks are located in these spaces primarily with respect to the stacking functions: '": This has resulted in a track spacing of up to 2 m.

:. · ·. Problems have been identified with such alignment of lines. A long bearing length: 30 nuts in the width direction of the stack to be dried causes the lower layers of the stack to hang between the conveyor tracks, which renders the lower layers, especially thinner timber, to become unusable during drying.

This problem is provided by an improvement in a drying plant of the above type having a plurality of parallel, substantially level planar conveyors at the floor level of the drying room for moving the timber stacks to be dried, at least one spaced apart provided with 10 actuating mechanisms for raising the support member substantially to the level of the conveyor tracks, respectively, for lowering it below this level.

Such a carrier member can be raised against the bottom layer of the stack after the stack transfer step, in which position the carrier member supports the stack during the drying period when the stack is stationary in the drying space. During the stack transfer phase, the support member can be lowered below the level of the conveyor tracks so that they do not interfere with the stack transfer.

The features of a preferred embodiment of the invention will be apparent from the following. 20 of claim 2.

t: I | · ....: The invention will be explained in more detail with reference to the accompanying drawing,; '· ·. where: ·: 25 Figure 1 is a cross-sectional view of the lower part of the kiln space, and '. ,,: Figure 2 shows a longitudinal section through a duct dryer.

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Figure 1 is a cross-sectional view of the lower part of the drying room. The status can be: *. chamber dryer or duct dryer. Its floor is fitted with conventional .1. : 30 like more parallel, spaced apart

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the conveyor tracks designated by the reference numeral 1 in the embodiment shown.

109831 3

The timber stack 2 to be dried is moved along these conveyors to the dryer, if necessary in a drying room, and removed therefrom after drying.

According to the invention, support members 3 are provided on the floor of the dryer, which in the embodiment shown are several spaced from the conveyor tracks. The supporting members extend parallel to the conveyor tracks and expediently substantially along their length. The supporting members 3 are arranged to be raised substantially to the plane of the conveyors, in which state these members 10 are shown in Fig. 1. Similarly, the supporting members can be lowered below the level of the conveyors, out of contact with the underside of the stack.

One structure of the bracket members 3 and their drive mechanism is only apparent to ku-15. The bracket members extend over the entire length of the duct dryer. They are provided with support rollers 4 spaced apart along the length of the support members 3. On the floor of the drying room, wedge surfaces 5 are mounted on rollers 4, on which support members 3 can be lifted and lowered by moving them longitudinally back and forth. This even- '' At the other end of the bracket member, to provide rearward movement 20, there is a pivot lever 6, which receives propulsion from the power unit 7. The power unit may be. for example, a pneumatic or hydraulic cylinder piston device.

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The carrier structure according to the invention is also useful in the treatment of wooden bundles of transport and storage '' 'directly connected to the dryer, where the bundles pass and / or stand on conveyor tracks corresponding to the conveyor tracks used in the dryer.

Claims (2)

1. Dryer for drying stacked sawdust material, which fork has in the drying space floor a plurality of parallel, substantially at the same level adjacent conveyor paths (1) for moving in the drying space the wood bundles (2) to be dried, characterized in that the diverter plane of the drying space is at least one spaced apart from the transport paths (1), substantially in their direction, supporting means (3), which extends over their length and is provided with a drive mechanism (4-7) for lifting the supporting means substantially to 10, and lower it below this level, respectively. Dryer according to claim 1, characterized in that the driving mechanism of the support member (3) comprises means (6, 7) for effecting a limited reciprocating longitudinal movement of the support member, a plurality of wedge surfaces (5): the length of the support member, and co-operating with the wedge surfaces \ corresponding support rollers (4). • • • • «· *« · · • • • • · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·