SU69615A1 - Weighing device for drying in chambers - Google Patents

Description

The known method of controlling the drying process, for example, wood in the drying chambers, by periodically weighing the control sample, has the disadvantage that in order to remove the sample it is necessary to periodically open the chamber and suspend the drying process.

The proposed device eliminates this drawback, as it allows you to continuously monitor the decrease in the weight of the control sample, without removing it from the drying chamber.

For this, the device according to the invention uses an air valve that senses the pressure created by the weight of the control sample. By means of this valve, the hermetically sealed compressed air chamber can communicate with the surrounding space. The degree of opening of the valve depends on the weight of the sample, therefore, the change in its weight is judged by the magnitude of the pressure drop in the chamber.

In FIG. 1 is a schematic diagram of a device in accordance with the present invention; in fig. 2 - section of the air valve, perceiving the pressure of the control sample of the tree.

Control sample 1, the standard weight, which is dried before drying, is placed in the drying chamber at the same time as it is loaded with a batch of wood to be dried.

One end of the sample / rests on a fixed support 2, and the second on the air valve 3, located at a certain distance from the support 2.

The valve 3 consists pz support 4, pivotally connected to the saddle. the valve blocking the opening of its chamber 6.

The sample / until suplki with its weight (standard) balances the air pressure in the chamber and keeps valve 3 closed. As the sample dries out, a gradual opening of the valve seat 5 occurs, as a result of which the air pressure in chamber 6 drops, which is recorded by a pressure gauge 5 connected to it by a pipeline 9.

Instead of a manometer, a recorder can be installed to continuously record changes in sample weight.

Subject invention

A device for weighing when drying in chambers, for example, wood, using the prchule of the class 891 as a weight-receiving control sample

a pan, the degree of opening of which depends on the weight of the control sample, characterized by the use of a hermetically sealed chamber filled with compressed air continuously supplied to it under constant pressure and associated with the surrounding space at

the aid of this valve in order to determine the weight by the magnitude of the pressure drop in the chamber, depending on the degree of opening of the valve, indicated, for example, by means of a manometer, directly calibrated in terms of the weight of the sample.

FIG. one