FI98348C - Wood chipping device - Google Patents

Description

, 98348

EQUIPMENT FOR LOGGING

The invention relates to a device for chipping logs, comprising a funnel for trees to be chipped, a chain or chain for performing chipping and a power device. The chipper is suitable for making wood chips from logs or logs

Chipping is now mostly done with tractor-powered, high-power chippers. There are two main types of chippers most commonly used: disc chippers and chip choppers. The operation of the disc chopper (eg FI 85 348 and FI 874 075) is based on a rotating disc to which several blades are attached and to which the wood is fed approximately radially by a separate feeder. The operation of the chipper (eg FI 812 135 and FI 705 38) is based on a conical, screw-like blade, in which the outer edge of the screw surface acts as a cutting part. In addition, several different types of chipper devices are known, one of which is disclosed in DK 148 317, in which the wood processing is performed by a chute tooth chain.

Wood chips are used as a heat source for farms or larger heating centers.

In urban detached houses with boiler heating, the heat source is mainly oil or wood. The use of wood chips is negligible due to poor availability or cumbersome handling. However, logs or logs are well available and easier to store and handle in agglomerations than loose chips (risk of freezing and mildew of wet chips). However, woodchip heating has advantages over oil heating, as wood is more environmentally friendly than oil. Chip heating has several advantages over wood-fired heating: better combustion efficiency, less nitrogen oxides are formed, no accumulator is needed and the combustion process can be automated.

In addition, in the future, the price of wood is likely to be even more competitive compared to the price of oil due to energy taxation, increasing efficiency and more efficient wood burning machines. It is also possible to burn wood chips in an oil boiler using the front housing.

By means of the device according to the invention, logs and logs can be chopped continuously or indoors continuously in accordance with the need for combustion. The device is low-power, the woodworking blade device is cheap and its design and structure are highly developed.

In addition, blade device maintenance is widely accepted. By means of the invention, the advantage of the above-mentioned wood heating can be achieved compared to oil heating without large additional investments in existing ice systems. Furthermore, the invention achieves the advantages of 98348 2 chips in combustion compared to logs and yet maintains the ease of handling the logs in storage and transfer, as well as the good availability of the logs. To achieve these advantages, the device is characterized by what is stated in the claims.

Figure 1 shows the device in section from the side

Figure 2 shows the device in partial section from above

Figure 3 shows a detail of the transmission of force to the blade device and the blade device

The device comprises a body (1), which may be double and there may be a porous material in between to attenuate the sounds produced by the blade device when chipping indoors. The frame can be insulated from the floor with rubber plugs (6) at the bottom (3). The cover (4) must be opened. The lid (4), the frame (1), the midsole (2) and the open sector (7) form a funnel (8) which acts as a wood storage. The trees (5) are placed in a loosely vertical funnel (8) on top of the intermediate base (2), whereby they flow under the influence of gravity onto the blade device and thus a separate feed device is not required. The funnel is dimensioned so that in a detached house the funnel needs to be filled once a day. The sector (7) is for removing and servicing the blade device and also has a chain oil tank (9) located on the upper part of the blade device. The frame (1), the intermediate base (2), the guide plate (10) and the feed screw (11) form a space (12) which acts as an intermediate storage for the chips, if necessary. The feed screw is powered directly from the shaft (20) or via a variator (not shown).

The processing of the chips is performed by a blade device (13) comprising a flange (14) and a gutter chain (IS), as in chainsaws. The blade device performs a rotary motion. The flange (14) is attached at one end to a plate (16), which in turn is attached to bearings (17) and to a switch (18) for rotating the blade device. The force is transmitted to the chain from the drive wheel (19), which is driven by the shaft (20) coming from the power unit (23). It may have a support wheel or piece (21) to stabilize the flange. To ensure the uniformity of the chips in a situation where there are a few centimeters of wood left, an adjustable counter (22) can be placed on the side of the flange to prevent excessive pieces from entering the intermediate storage (12), so that all the chips have to pass between the chain and the counter.

The chipper can be in the same state as the boiler or the feed screw passes through the wall. In the application of Figure 1, the feed screw is powered by the same power unit (23) as the chipper.

The device can also be placed far from the boiler, in which case the transfer of chips to the boiler can be tracked, for example, by a spiral conveyor. The device can also be used for one-time chipping with a separate feeder or with a larger intermediate storage (12) and a separate feed or switch system. If necessary, the funnel can be the same height as the room and is filled with side-opening doors.

Claims (7)

A device for continuous chipping of wood or sticks, which comprises a frame (1), a power plant (23), a feeding device or a funnel (9) for wood (5) to be chipped and a cutting device (13) which processes the chip, characterized in that the cutting device (13) comprises a sword (14) and a tooth chain (15) which rotates around the sword and that the cutting device is at one end directed towards an axis (20) and makes a circular motion, while the chain (15) at the same time making a machining movement towards the wood (5) placed in a suitable position. Device according to claim 1, characterized in that the force which rotates the cutting device is transmitted through a coupling (18) and a disc (16) and the force to the chain (15) is transmitted from a drive wheel (19) arranged at the end of the shaft (20). coming from the power device (23). 3. Device according to claims 1-2, characterized in that at the cutting device (13) there is a support roller (21) under the sword (14) and a stop rail (22) which controls the maximum size of the chip. Device according to claims 1-3, characterized in that the cutting devices (13) are two or more in each other. Device according to claims 1-4, characterized in that the chain is a paddle chain. Device according to claims 1-5, characterized in that the body (1) is formed by a double cylinder, the bottom (3) of which is provided with rubber pins (6) and in which a cylinder (7) is of a suitable shape for storing chain oil. (9) and for the downhole of the cutting device (13). Device according to claims 1-6, characterized in that the device for moving the chip has a conveyor (11) which receives the power from the same force device (23) as the cutting device (13).