RU212821U1 - Device for surface treatment of wood products by low-temperature plasma flows - Google Patents

Abstract

The utility model relates to the field of simultaneous heat treatment of all surfaces of wooden products using plasma energy to improve their operational and decorative properties. The plant for processing wood products, powered by a power source, has an indirect plasma generator and a water-cooled chamber for concentrating heat flows. The end sides of the chamber are closed with lids having two holes through which wood products of a given shape are fed. To separate the plasma flows, a divider is located inside the chamber on a flat dome, and a heat insulator is installed to reduce heat losses. A window for the exit of heated gases is located on the vertical wall of the chamber. The surface of processed wood products is more resistant to the appearance of fungi, mold and other wood defects due to the removal of an environment suitable for their formation, in addition, the products absorb water several times slower than the original wood.

Description

The utility model relates to the field of simultaneous heat treatment of all surfaces of wooden products using plasma energy to improve their operational and decorative properties.

Known installation for the manufacture of bars of modified wood (patent No. 162843 publ. 07.10.2014), containing an impregnation device and a drying and pressing unit for simultaneous drying and hot pressing. Pressing is carried out by angled drive rollers, and perforated metal plates are placed between the wood and rollers to ensure constant compression, and after obtaining the required thickness, the bars are cooled with cold air in a clamped state. Positive effect: simplification of the design of technological equipment for the manufacture of modified bars.

The disadvantage of the installation is the use of mechanically complicated processes, namely, press positioning equipment with driven rollers, as well as the involvement of additional technological tools.

The closest in technical essence (prototype) device for volumetric-thermal plasma processing of wooden products (patent No. 177495 published on February 28, 2018), containing an indirect plasma generator and a cylindrical water-cooled chamber with end caps, in which holes are made for the passage of processed wooden products . The geometric shape of the holes can be different in accordance with the geometric shape of the cross section of the processed wooden product. To accommodate the plasma flow coming out of the plasma generator, a water-cooled channel is used, which is rigidly fixed on the body of the plasma generator and is tangentially connected to a cylindrical water-cooled chamber. Such a connection of the plasma generator with the chamber ensures the circulation of heat flows in the chamber and uniform processing of the entire surface of the wooden product at reduced energy consumption.

The disadvantages of the known device are low productivity and high energy consumption when it is implemented in industrial conditions due to the impossibility of processing several wood products at the same time.

The purpose of creating a technical solution is to create a plant for processing wood products that eliminates these shortcomings.

To solve this problem, the installation for processing wood products, operating from a power source, has an indirect plasma generator and a water-cooled chamber for concentrating heat flows. The end sides of the chamber are closed with lids having two holes through which wood products of a given shape are fed. To separate the plasma flows, a divider is located inside the chamber on a flat dome, and a heat insulator is installed to reduce heat losses. A window for the exit of heated gases is located on the vertical wall of the chamber.

The installation for processing wood products (Fig. 1) includes a power source 1, an indirect plasma generator 2 and a water-cooled heat flux concentration chamber 3. The sectional shape of the heat flux concentration chamber 3 is trough-shaped with vertical walls and a gentle arch. An indirect plasma generator 2 is located in the lower part of the heat flux concentration chamber 3. The end sides of the chamber 3 are closed with covers 4 (Fig. 2). End caps 4 are made with two holes 5 for the passage of processed wooden products 9. Holes 5 are made of a rectangular shape, and in particular cases may have different geometric shapes corresponding to the geometric shape of the cross section of the processed wooden products 9. Holes 5 on the end caps 4 are made of the same size at the inlet and outlet of the chamber 3 to eliminate displacement, and accordingly, uneven processing of final products. A splitter 6 is located on a flat vault inside the chamber 3, which allows dividing the plasma flow, thereby ensuring uniform processing of all surfaces of two wooden products 9 at once, and a heat insulator 7 is installed to reduce heat losses. To exit heated gases, a window 8 is located on the vertical wall of the chamber 3 .

Installation for the processing of wood products works as follows. When the power supply is turned on, the plasma generator of indirect action is started. From the end side of the device, through the holes in the cover, products of a given geometric shape are fed into the chamber for concentrating heat flows. During the passage of products through the chamber, a uniform thermal effect on the surface of the products is carried out by plasma heat fluxes. Thanks to the installed splitter, the flow emerging from the gap between the two workpieces is divided into two components, the direction of which provides a uniform thermal effect simultaneously on all surfaces of wooden products due to the circulation of heated gas. After processing products, heated gases go out the window.

The surface of processed wood products is more resistant to the appearance of fungi, mold and other wood defects due to the removal of an environment suitable for their formation, in addition, the products absorb water several times slower than the original wood.

Thus, the claimed technical solution allows to increase the productivity of products and reduce energy consumption in the production process, the technical task is to create a device for surface treatment of wood products with low-temperature plasma flows.

Claims (1)

A device for surface treatment of wood products with low-temperature plasma flows, powered by a power source, has an indirect plasma generator and a water-cooled heat flux concentration chamber with end caps, characterized in that the sectional shape of the heat flux concentration chamber is trough-shaped with vertical walls, on one of which there is a window for the exit of heated gases, and a flat arch, on which a divider is installed for separating plasma flows, and a heat insulator is installed to reduce heat losses, and the end caps having two holes at the inlet and outlet of the chamber are made of the same size.

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