RU221664U1 - DEVICE FOR DETERMINING THE HISTORY LENGTH OF SCRAPPED LINEN FIBER - Google Patents

Abstract

The utility model relates to the field of flax production and processing, namely to its qualimetry and standardization, and can be used to determine the handful length of torn flax fiber. The purpose of the utility model is to increase the accuracy of determining the handful length of scuffed flax fiber and to simplify the design of the device for this determination. This task is achieved by the fact that in a device for determining the horst length of torn flax fiber, including a base, plates that can move with displacement of their edges, as well as a measuring scale for monitoring the cross-section of the fiber, the base is connected to fixed identical double plates that have on the upper edge there is an angular cutout with an apex angle of 60°, and there is also a movable plate of certain dimensions and mass, which with its plane can freely move under its own weight relative to the fixed axis of rotation near the planes of the fixed plates in the direction of their cutout angles if there is fiber in it, Moreover, the initial angle of movement of the lower edge of the movable plate from the horizontal is unchanged, and to control the fiber cross-section at the moment of approaching the edges of the plates in the corner cutout when they are stationary, a scale is used, on which the angle of deviation of the lower edge of the movable plate from its initial position is used as an indirect measure . The proposed device does not require large expenditures in its manufacture and makes it possible to increase the accuracy of determining the horst length.

Description

The utility model relates to the field of flax production and processing, namely to its qualimetry and standardization, and can be used to determine the handful length of torn flax fiber.

There is an instrumental method for determining the handful length of scuffed flax using knots to identify the center of gravity of a handful bent in half and a special pencil case for this identification [1]. However, this method has a drawback related to the correct determination of the place where the handful is folded. Because of this, the accuracy of determining the horst fiber length is reduced.

There is an instrumental method for determining the handful length of torn flax using a device that includes a pair of rollers, between which a handful of flax fiber is passed. Based on the skipping results, the longitudinal sectional area of the handful and its maximum height are calculated, and depending on them, the fiber length is calculated [2]. However, this instrumental method is difficult to implement, since it requires the creation of a special control and calculation system.

There is an instrumental method for determining the handful length of scuffed flax using a special device, including a base, plates that can move with displacement of their edges, as well as a measuring scale for monitoring the cross-section of the fiber. In this case, the handful length of scuffed flax is determined as the distance between the established sections at opposite ends of the handful [3]. However, this device for fixing the cross section has a disadvantage due to the influence of the speed of movement of the spring-loaded plates on the compaction of the fiber when controlling its cross section. This reduces the accuracy of determining the horst length.

Despite these disadvantages, the known device [3] in its technical essence and the achieved result is closest to the claimed one, and therefore it can be chosen as a prototype.

The purpose of the utility model is to increase the accuracy of determining the handful length of scuffed flax fiber and to simplify the design of the device for this determination.

This task is achieved by the fact that in a device for determining the horst length of torn flax fiber, including a base, plates that can move with displacement of their edges, as well as a measuring scale for monitoring the cross-section of the fiber, according to the utility model, the base is connected to fixed identical double plates , which have an angular cutout on the upper edge with an apex angle of 60°, and also have a movable plate of certain dimensions and mass, which with its plane can freely move under its own weight relative to the fixed axis of rotation near the planes of the fixed plates in the direction of their cutout angles, if available there are fibers in it, and the initial angle of movement of the lower edge of the movable plate from the horizontal is unchanged, and to control the fiber cross-section at the moment the edges of the plates approach each other in the corner cutout when they are stationary, a scale is used, on which the angle of deviation of the lower edge of the movable plate is used as an indirect measure from its initial position.

The presence of a base associated with fixed identical double plates, which have an angular cutout on the upper edge with an apex angle of 60°, allows for a stable placement of a handful of fibers in the angular cutout while simultaneously being pressed by a movable plate. In this case, the presence of an angle of 60° forms the cross-sectional shape of the pressed fiber in the form of an equilateral triangle, in which the area S is related to the radius r of the circle inscribed in it according to the formula: S=r⋅3⋅(3 ^0.5 ). This dependence allows you to control the required area value using a round rod of the required radius of curvature, which is important for correct control of the readings of the indirect measure on the scale.

The use of a movable plate of certain dimensions and mass, which with its plane can move freely under its own weight relative to the fixed axis of rotation near the planes of the fixed plates in the direction of their cutout corners, if there is fiber in it, ensures the necessary location of a handful of fiber between all the plates in the corner cutout of the fixed plates. In this case, it is important that the initial angle of movement of the lower edge of the movable plate from the horizontal, since this ensures the constancy of the fiber density in the area between all the plates. This increases the accuracy of identifying the required constant cross-sectional area of the fibers at the ends of the handful when determining its horst length.

The use of a scale to control the fiber cross-section at the moment of approaching the edges of the plates in the corner cutout when they are stationary, on which the angle of deviation of the lower edge of the movable plate from the horizontal is used as an indirect measure allows, without complicating the design of the device, to ensure the necessary accuracy in identifying the area of the required cross-section of a handful.

The essence of the utility model is illustrated by drawings.

Figure 1 is a side view;

Fig. 2 is a view A (from the end) of a device for determining the handful length of torn flax fiber.

The device includes a base 1 connected to fixed identical double plates 2a and 2b, which have an angular cutout on the upper edge with an apex angle of 60°, in which the fiber 3 is located. There is a movable plate 4, which is fixed to an axis 5, fixedly fixed to stand 6. The movable plate in its initial position rests on the protrusion 7 of the flexible stand 8, which has the ability to deviate to position 8a, in which the movable plate 4 is not on the protrusion 7. In this case, the lower edge of the movable plate is located at a constant angle U above the horizontal.

When the flexible stand is forced to deflect, the movable plate under its own weight can freely fall onto the fiber in the corner cutout, providing constant conditions of pressing against the fiber.

The device also contains a scale 9, on which, as an indirect measure, is the angle of deviation of the lower edge of the movable plate from the horizontal. The scale values are functionally related to the cross-sectional area formed when the movable plate is lowered and stopped relative to the edges of the fixed plates.

An example of a specific implementation.

A device for determining the handful length of torn flax fiber works as follows. When working with it, it should be understood that the handful length of scuffed flax fiber is determined by the distance between sections of equal and certain area (for example, 5 mm, which is required by GOST R 53484-2009 “Scrambled flax. Technical conditions”), identified using the proposed device.

To identify these sections, first use one of the ends of the handful. To do this, the movable plate 4 is installed on the stop 7 of the flexible stand 8. The end of the fiber 3 is placed in the corner cutout of the fixed plates 2 and 2a. After this, the flexible stand 8 is forcibly deflected to position 8a, ensuring the free lowering of the movable plate onto the fiber. Next, on a scale of 9, the position of the lower edge of the movable plate is monitored. If a value is reached at which the required fiber cross-sectional area is formed through the functional relationship (for example, 5 mm), then the analysis is stopped. It is repeated further for the other end of the handful.

If the required area is not achieved, then the end of the fiber is shifted relative to the fixed plates and the required area is again determined. Such repetitions are carried out until the required cross-sectional area is achieved.

The proposed device for determining the horst length of scuffed flax fiber does not require large costs in its manufacture and makes it possible to increase the accuracy of estimating the horst length.

Information sources

1. RF Patent No. 2153150 “Method for determining the length of tattered fiber”, authors: Vinogradova S.V., Pashin E.L. Patent owner Kostroma State University, publ. July 20, 2000, bulletin. No. 20.

2. RF Patent No. 2240498 “Method for determining the average length of flax”, authors: Kulikov A.V., Vinogradova A.E., Pashin E.L. Patent owner Kostroma State University, publ. November 20, 2004, bulletin. No. 32.

3. Instruments for determining the quality of bast raw materials. Compiled by E.P. Borschova, V.M. Osipova, V.A. Korneeva, M., 1967, p. 74-75.

Claims (1)

A device for determining the horst length of scuffed bast fiber, including a base, a measuring scale for monitoring the cross-section of the fiber, characterized in that the base is connected to a fixed identical double plate, which has an angular cutout on the upper edge with an apex angle of 60 degrees, and there is a movable plate made with the possibility of free movement of its plane under its own weight relative to the fixed axis of rotation in the direction of the angular cutout of the planes of the fixed plates if there is fiber in it, and the initial angle of movement of the lower edge of the movable plate from the horizontal is unchanged, and to control the cross section of the fiber at the moment To bring the edges of the plates closer together in the corner cutout when they are stationary, a measuring scale is used, on which the angle of deviation of the lower edge of the movable plate from the horizontal is used as an indirect measure.