RU132169U1 - DEVICE FOR CENTRIFUGAL DRYING OF WOODEN Billets - Google Patents

Abstract

A device for centrifugal drying of wooden blanks, including a housing with a movable hollow rotor with a horizontally oriented axis of rotation, equipped with a drive and cassettes, each of which is made in the form of two coaxially arranged discs rigidly interconnected, the side surfaces of which are provided with grooves for attaching the wooden blanks and folding lids with perforated holes to hold wooden blanks on the outer surface of the cassette, and the cassettes are mounted on a guide passing through h axis of the hollow rotor, with the possibility of rotation, characterized in that the hollow rotor and its drive are mounted on a movable carriage equipped with a mechanism for moving the hollow rotor along the guide.

Description

The device for centrifugal drying of wooden billets is intended for artificial dehydration of wood and can be used in industrial lines for the production of lumber on an industrial scale at timber processing enterprises.

A known installation for rotary drying of wood, including a power unit associated with a rotor made in the form of a drum with a horizontally oriented axis of rotation, which is equipped with balancing devices made in the form of two spring supports for the rotor shaft, providing the ability to change the position of the axis of the rotor shaft, in any planes, and means for transmitting rotation from the power unit to the rotor shaft are made in the form of a cardan mechanism, while the installation is equipped with devices for loading the drum packages processed wood products, and the drum is provided with a means for strengthening the package of workpieces of wood in its cavity [Invention patent RU 2279613, "Apparatus for drying wood rotary", priority of 27.04.2006.].

This installation has several disadvantages. Due to the fact that centrifugal forces of different sizes will act on the outer and inner surfaces of the bag, the wood will dry unevenly. In addition, moisture under the influence of centrifugal force passes through the entire package (from the base of the package to the inner wall of the drum). This leads to a significant increase in the time of rotary drying, and, consequently, to an increase in energy consumption and a decrease in its productivity.

A device for dehydration of lumber is known, comprising a rotating drum with a drive mounted on the base, on the outer surface of which partitions are mounted to accommodate lumber and perforated openings for hinged lids to hold lumber on the outer surface of the drum [Utility Model Patent RU 114360 “Device for dehydrating lumber ”, Priority of March 20, 2012].

The disadvantage of this device is that the formation of a package of lumber on the surface of the drum body must be done manually by stacking individual lumber in special grooves, which leads to a significant investment of time for this operation, and the operation of unloading lumber after drying. In addition, due to the need to manually lay a package of lumber on the surface of the drum body, this device cannot be used on automatic lines for drying lumber.

It should also be noted that in the process of forming a package of lumber, the drum is idle, which generally reduces the drying performance of lumber with this device.

Closest to the proposed device is a device for dewatering wooden workpieces, including a housing on which a hollow rotor with a horizontally oriented axis of rotation is mounted, equipped with a drive and removable cassettes, which are alternately placed in the rotor cavity. The hollow rotor is made with open ends. Removable cartridges are made in the form of two coaxially located discs rigidly interconnected. Their side surfaces are provided with grooves for attaching wooden blanks and hinged lids with perforated holes for holding wooden blanks on the outer surface of the removable cassette. Removable cassettes are mounted on a guide passing through the axis of rotation of the hollow rotor, with the possibility of moving along it through the open ends of the hollow rotor using additional feeders mounted on the housing [Application for utility model RU 2012150937 “Device for centrifugal drying of wooden blanks”, priority from 27.11 .2012].

The technical result, which is achieved by the claimed device for centrifugal drying of wooden billets, is compactness, reducing the area required for installation, as well as reducing material consumption.

A technical result is achieved due to the fact that the hollow rotor and its drive are mounted on a movable carriage equipped with a mechanism for moving the rotor along the axis of the hollow rotor.

Figure 1 shows a General view of a device for centrifugal drying of wooden blanks with two cassettes. In the figure, a quarter of the hollow rotor is cut out.

Figure 2 shows the installation diagram of a hollow rotor with drives on a movable carriage.

A diagram of a movable carriage with a hollow rotor drive (top view) is shown in FIG. 3.

Figure 4 shows the cartridge (on the hinged lids with perforated holes are not shown holes).

Figure 5 shows the locking mechanism for securing a removable cartridge inside the hollow rotor.

A device for centrifugal drying of wooden blanks consists of a housing 1, a movable hollow rotor 2 with a horizontally oriented axis of rotation with a drive 3 mounted on a movable carriage 4, cassettes 5 and 6, a protective wall 7 mounted on a guide 8, feeding conveyors 9 and 10, receiving conveyor 11 and a protective casing (not shown).

In the lower part of the housing 1 is equipped with a discharge window 12.

On the outer surface of the hollow rotor 2, guides 13 are installed. In addition, the hollow rotor 2 is provided with slots 14 for fixing removable cartridges 5 and 6.

The drive 3 is mounted on a movable carriage 4 and consists of support rollers 15, 16, drive rollers 17, 18, transmission 19 and engine 20. The support rollers 15, 16 and drive rollers 17, 18 are provided with flats 21 for guides 13.

Drive rollers 17 and 18 have brakes to stop them (not shown).

The movable carriage 4 consists of a base 22, wheels 23 and a drive (not shown).

Cassettes 5 and 6 are made in the form of two coaxially arranged discs 24 rigidly interconnected, and their side surfaces are provided with grooves for attaching wooden blanks 25 and hinged covers with perforated holes 26 designed to hold wooden blanks on the outer surface of the removable cassette.

Hinged covers with perforated openings 26 are provided with locks for holding them in the closed position (not shown).

The number of hinged covers can be different (from two or more) depending on the size of the drum and the method of loading wooden blanks into the cassette.

The lateral surfaces of the removable cassettes 5 and 6 are provided with locking mechanisms 27 located on their lateral surfaces.

The locking mechanism is a stopper 28, sliding in the fixed guides 29 under the action of the springs 30. The number and location of the locking mechanisms 27 can be different and is determined by the force necessary to securely hold the removable cartridge 5 or 6 in the hollow rotor 2.

The protective wall 7 consists of a steel support ring 31 and a rubber gasket 32. The purpose of the protective wall 7 is to prevent the water generated during centrifugal drying from being thrown onto an adjacent cassette.

Cassettes 5 and 6, as well as the protective wall 7 are installed on the guide 8, rigidly mounted on the housing 1.

The process of using the device is as follows. The removal of moisture from wooden preforms is based on the action of centrifugal forces arising from the rotation of the hollow rotor 2 with the cassette 5 (or 6) placed inside it, on the outer surface of which the wooden preforms are fixed.

Dehydration of wooden blanks begins with their feeding and loading by a feeding conveyor 9 into the cassette 5. Loading can be carried out manually or without the use of manual labor.

With manual loading, the hinged lid with perforated openings 26 is initially opened and the wooden blanks supplied by the conveyor 9 are stacked in grooves 25. After filling all available grooves 25, the hinged lid with perforated openings 26 is closed. Then the removable cartridge 5 is rotated and another hinged lid with perforated holes 26 is opened and all available slots 25 are filled. The entire removable cartridge 5 is loaded in the same way.

Download wooden blanks in a removable cassette 6 without the use of manual labor is as follows. Open the hinged lid with perforated holes 26, while the removable cassette 5 is oriented so that the wooden workpiece coming through the feed conveyor 9, when leaving it, falls into the groove 25. After placing the wooden workpiece in the groove 25, the removable cassette 5 is rotated to fit the next wooden blanks.

After filling all the available grooves 25, the hinged lid with perforated holes 26 is closed and locked with locks (not shown). Then, the removable cassette 5 is rotated and another hinged lid with perforated openings 26 is opened and all available grooves 25 are similarly filled.

After loading the removable cartridge 5, the hollow rotor 2 is mounted so that the cartridge 5 is in its inner cavity. This is as follows. Through the wheels 23, the base 22 of the movable carriage 4, on which the hollow rotor 2 is mounted, drives under the cassette 5.

The cassette 5 is fixed in the hollow rotor 2 by means of fixing mechanisms 27. Fixing is carried out when the stopper 28 sliding in the fixed guides 29, under the action of the springs 30, enters the groove 14 located on the hollow rotor 2.

Next, they begin to dehydrate the wooden workpieces by rotating the hollow rotor 2. For this, with the help of the drive 20, the torque is transmitted through the transmission 19 to the drive rollers 18 and 17, which in turn transmit the moment to the hollow rotor 2.

Under the action of centrifugal forces, water from wooden billets through hinged lids with perforated holes 26 falls on the inner surface of the hollow rotor 2, where it is removed through open ends.

In the process of dewatering the wooden blanks located on the removable cassette 5, the removable cassette 6 is loaded with the next batch of wooden blanks. This operation is carried out in the same way as when loading the removable cassette 5, then we distinguish that the wooden workpieces arrive through the feed conveyor 10.

After dewatering with the help of brakes of the driving elements (not shown), the hollow rotor 2 is stopped. Then, using the movable carriage 4, the hollow rotor is fed to the cassette 6 and dehydration is started.

The hollow rotor 2 when fed to the cartridge 5 or 6 passes through the protective wall 7. This is due to the presence of the protective wall 7 of the rubber gasket 32, which when passing through the hollow rotor 2 is bent.

Simultaneously with the dewatering of the wooden workpieces located on the removable cassette 6 in the hollow rotor 2, they begin to unload the removable cassette 5. To do this, open the hinged lid with perforated holes 26. Turn the removable cassette 5 so that the dehydrated wooden workpieces from the grooves 25 fall onto the hinged lid with perforated holes 26 and along it already rolled down to the receiving conveyor 11. On the receiving conveyor 11, the dehydrated wooden billets are removed from the device.

Similarly, dehydrated wooden billets under other hinged lids with perforated openings 26 are unloaded.

Next, load the removable cartridge 5 with the next portion of the wooden blanks.

Thus, the use of the proposed device can significantly reduce the size of the installation and material consumption by reducing the distance between the cassettes.

In addition, the reduction in material consumption is also achieved due to the fact that there is no need for additionally mounted on the case of the feeder mechanism of removable cartridges. In the proposed design, the cassettes do not move along the guide. Instead, the hollow rotor moves along it.

Claims (1)

A device for centrifugal drying of wooden blanks, including a housing with a movable hollow rotor with a horizontally oriented axis of rotation, equipped with a drive and cassettes, each of which is made in the form of two coaxially arranged discs rigidly interconnected, the side surfaces of which are provided with grooves for attaching the wooden blanks and folding lids with perforated holes to hold wooden blanks on the outer surface of the cassette, and the cassettes are mounted on a guide passing through h axis of the hollow rotor, with the possibility of rotation, characterized in that the hollow rotor and its drive are mounted on a movable carriage equipped with a mechanism for moving the hollow rotor along the guide.

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