RU76108U1 - DEVICE FOR DRYING FORESTRY - Google Patents

Abstract

The utility model relates to the field of drying wood materials and can be used in devices for rotational drying of round timber, which is designed to prepare timber for subsequent atmospheric or chamber drying. The technical task of the utility model is to increase the productivity of the device, as well as to increase the service life of the transmission shaft. A device for drying timber 1, includes a drive 2, a rotating gear shaft 4 fixed in the bearing assembly 3 and having a rotation axis 5, a platform 6 for placing timber 1 on it. The platform 6 is equipped with cups 7 mounted around its periphery for vertical placement of timber 1, the bottom 8 of each of the glasses 7 is located under the platform 6 at a distance from the lower surface 9 of the platform 6, exceeding half the length of the processed timber 1, and the transmission shaft 4 is made of composite upper about 10 and the lower flexible 11 elements, and the glasses 7 can be mounted perpendicular to the plane of the platform 6 or inclined to the plane of the platform 6, while their axis 12 make an acute angle with the axis 13 of the transmission shaft 4. Load timber 1 vertically into the glasses 7. Turn on the device . Due to centrifugal forces, the hydrostatic pressure in the inner cavity of the timber 1 increases and the tree sap is released through the ends and the side surface along the core rays and leaves the wood, flows into glasses 7, and then is collected in containers installed under the platform 6.

3 p.p.

Description

The utility model relates to the field of drying wood materials and can be used in devices for rotational drying of round timber, which is designed to prepare timber for subsequent atmospheric or chamber drying.

A known method and device for rotary drying of timber in a centrifugal type device. (P.S. Sergovsky, hydrothermal treatment and preservation of wood, M., Forest industry, 1987, p.239-240). The device includes a platform for placing timber on it and a rotation mechanism with a drive. Timber is arranged radially relative to the axis of rotation.

A disadvantage of the known technical solution is the low productivity of the method and device due to the fact that since the timber is located radially relative to the axis of rotation - during the drying process, moisture is removed mainly in the longitudinal direction.

There is also a known method and device for rotary drying of timber in a centrifugal type device. (AS USSR No. 450064, B26F 5/08, publ. 15.11.74 prototype). The device includes a platform for placing timber on it and a rotation mechanism with a drive, and the rotation mechanism is made in the form of a driveshaft. Timber is arranged radially relative to the axis of rotation.

A disadvantage of the known technical solution is the low productivity of the method and device due to the fact that since timber is located radially relative to the axis of rotation -

The drying process removes moisture mainly in the longitudinal direction. In addition, due to the uneven distribution of the mass of timber relative to the axis of rotation, vibration occurs that destroys the centrifuge shaft.

The technical task of the utility model is to increase the productivity of the device, as well as to increase the service life of the transmission shaft.

This object is achieved by the fact that in the device for drying timber, including a drive, a rotating transmission shaft and having a rotation axis, a platform for placing timber on it, the platform is equipped with cups mounted on its periphery for vertical placement of timber, the bottom of each of the glasses is under the platform at a distance from the lower surface of the platform exceeding half the length of the processed timber, and the transmission shaft is made up of a composite upper hard and lower flexible elements, and the glasses can be mounted perpendicular to the plane of the platform or inclined to the plane of the platform, while their axis is an acute angle with the axis of the transmission shaft.

The utility model has the following differences from the prototype:

- the platform is equipped with glasses mounted on its periphery for vertical placement of timber in them;

- the bottom of each of the glasses is located under the platform at a distance from the bottom surface of the platform, exceeding half the length of the processed timber;

- the transmission shaft is made integral of the upper rigid and lower flexible elements;

- glasses can be mounted perpendicular to the plane of the platform;

- glasses can be mounted obliquely to the plane of the platform, while their axis is an acute angle with the axis of the transmission shaft.

This will increase the productivity of the device, as well as increase the service life of the transmission shaft.

In the patent information fund that we reviewed, no technical solutions with the indicated differences were found, as well as technical solutions with the specified set of distinctive features.

The device is applicable and will be used in the industry in 2008.

Figure 1 shows a diagram of a device for drying timber, front view;

Figure 2 is the same, view along arrow A;

Figure 3 shows a fragment of a platform with mounted inclined glasses;

Fig. 4 is a diagram explaining the effect of forces when arranging glasses obliquely to the plane of the platform.

A device for drying timber 1, includes a drive 2, a rotating gear shaft 4 fixed in the bearing assembly 3 and having a rotation axis 5, a platform 6 for placing timber 1 on it. The platform 6 is equipped with cups 7 mounted around its periphery for vertical placement of timber 1, the bottom 8 of each of the glasses 7 is located under the platform 6 at a distance from the lower surface 9 of the platform 6, exceeding half the length of the processed timber 1, and the transmission shaft 4 is made of composite upper about 10 and lower flex elements 11, the pads 7 can be mounted perpendicular to the plane of the platform 6 or obliquely to the plane of the platform 6, while their axes make an acute angle 12 with the axis 13

transmission shaft 4. The bottom of 8 glasses 7 is made with holes (not shown in FIG.) for draining the wood juice that accumulates in them, which is a valuable product for the chemical industry.

The device operates as follows.

Timber 1 is loaded vertically (very conveniently) into glasses 7. It is unnecessary to fix timber 1, because the center of gravity lies below the plane of the platform 6, which will prevent their ejection from the device during the rotation of the platform 6. Turn on the device. Due to centrifugal forces, the hydrostatic pressure in the inner cavity of the timber 1 increases and the tree sap is released through the ends and the side surface along the core rays and leaves the wood, flows into glasses 7, and then is collected in containers installed under the platform 6 (not shown in Fig.). Thus, losing moisture, the timber dries, and not only due to the longitudinal removal of moisture in comparison with the prototype.

The implementation of the transmission shaft 4 composite of the upper rigid 10 and the lower flexible 11 elements provides for the imbalance of the deviation of the platform 6 during its rotation, i.e. provides its vibration-free rotation, and therefore increases the service life of the transmission shaft 4.

When performing the platform 6 with inclined mounted glasses 7 (see figure 3), the stability of the timber 1 during the rotation of the platform 6 is improved, and the rate of moisture removal from the timber in the longitudinal direction (see figure 4) is also increased due to the fact that component of the inertia directed along the timber 1, and therefore increases the productivity of the device.

The drying time in the claimed device depends on the diameter of the platform 6 (on the number of glasses 7) and the rotation frequency of the platform 6. For example, for drying freshly cut wood

to a humidity of 40% in a centrifuge with a diameter of 4.5 m, with a speed of 500 rpm it takes 10-15 minutes.

Drying to a moisture content of less than 40% (i.e., drying) is carried out in standard drying chambers of any type.

The drying time in the claimed device with additional drying in a standard dryer is 2-3 times less than the drying in a standard dryer.

Claims (3)

1. A device for drying timber, including a drive, a rotating transmission shaft and having a rotation axis, a platform for placing timber on it, characterized in that the platform is equipped with cups mounted on its periphery for vertical placement of timber, the bottom of each of the glasses is under the platform on a distance from the lower surface of the platform exceeding half the length of the processed timber, and the transmission shaft is made up of a composite of the upper rigid and lower flexible element ov. 2. The device according to claim 1, characterized in that the glasses are mounted perpendicular to the plane of the platform. 3. The device according to claim 1, characterized in that the glasses are mounted obliquely to the plane of the platform, while their axis is an acute angle with the axis of the transmission shaft.