SU1726601A1 - Apparatus for liquid and thermal treatment of moving textile material - Google Patents

Abstract

The invention relates to devices for heat treating textiles using RF and microwave energy. The aim of the invention is to improve the quality of processing. The device comprises a liquid treatment chamber and a drying chamber connected to each other by a waveguide direct channel made in the form of a tee, the branch channel of which is connected to an electromagnetic pulse generator, and means for generating pulses with a steep front are placed in the waveguide at the outlet of the material liquid treatment chamber. 1 hp f-ly, 2 ill.

Description

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The invention relates to dyeing and finishing equipment of textile industry, in particular to devices for heat treatment of textile materials using RF or microwave energy.

A device for drying textile materials is known, consisting of two chambers, a heating and a drying one, located one after the other.

In the heating chamber, the material is heated by high-frequency radiation without reducing its humidity, and in the drying chamber, moisture is removed from the material.

The disadvantage of this device is the low efficiency,

caused by the need to extinguish waste energy.

It is also known a device for heat treatment of moving textile materials, comprising a shielding chamber, a high-frequency generator and a working capacitor made in the form of two-way spiral electrodes wound with a variable pitch around the axis of the product.

This device works efficiently when heat-setting textile materials in the form of bundles and ropes, however, to heat-fix textile webs, such a construction of a working capacitor is unacceptable, as this should increase the length of the electrodes, which leads to

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the emergence of wave effects that worsen the heat-setting mode.

A known installation for heat-setting ropes of synthetic fibers, consisting of a cylindrical waveguide, in which a traveling wave of type Eo1 is excited, magnetron generators, a device for treating the rope with hot air, filters for suppressing radio emission, power supply, receiving and tensioning devices, bath to wet the product before heat treatment,

The described setup is taken as a prototype. The disadvantage of it, as well as of other similar installations, is the need to suppress the traveling wave at the exit of the installation, and the energy loss in this case is 50-60%.

The purpose of the invention is to increase the quality. processing by increasing the efficiency and intensification of the liquid treatment process.

This goal is achieved by the fact that in the proposed installation comprising a liquid treatment chamber, a waveguide, a drying chamber, an electromagnetic pulse generator, filters for suppressing radio emissions and a transporting device, the liquid treatment chamber is connected to the drying chamber by means of a waveguide, and the waveguide itself is equipped with a device for generating pulses with a cool front.

FIG. 1 shows the proposed device; in fig. 2 shows section A-A in FIG. one.

The device comprises a liquid treatment chamber 1, which is a closed tank with a system of conveying rollers 2, along which the processed material 3 moves. The chamber 1 is connected to the heat-fixing chamber 4, which is a rectangular waveguide, in which from two magnetrons 5 operating in the range 2375 ± 50 MHz, with an output of 5 kW each, an EOL type wave was excited. At one of the inputs of camera 4, a device 6 was installed for generating a pulse with a steep front, which is a delay line with nonlinear elements, Figures shown in FIG. 2: 7 - dielectric layer, 8 - ferrite layer, oriented against the floor wave; 9 - ferrite layer oriented along the wave field. The other input of the chamber 4 is connected to the drying chamber 10. Filters 11 are installed at the inlet and outlet of the chambers.

The device works as follows.

In the dyeing chamber 1 using a system of transporting rollers 2 gives-

with the material being processed 3, for example, a textile web which is transported to the heat-setting chamber 4, which is a rectangular waveguide connected to the magnetrons 5, in which an EOL-type wave is excited Part of the wave energy is absorbed by material 3, due to which its temperature rises sharply and another guided through a waveguide through a device 6 for forming pulses with a steep front into chamber 1. Device 6 is a delay line with nonlinear elements, which can be used as us ferroelectric capacitors with inductors made on ferrite, connected by one of the known circuits the delay line.

As the pulse amplitude increases, the permeability of ferroelectrics and ferrite cores decreases, with the result that parts of a pulse with a larger amplitude will receive a lower delay than parts of a pulse with a smaller amplitude. Therefore, the steepness of the leading edge of the pulse transmitted through a similar line will increase (6). Passing device 6, an EOI type wave at the interface of two media (air-liquid) turns into a shock, and the pressure of the wave on the material at the point of contact increases, thereby improving the diffusion of the liquid into the material. Having passed the heat-setting chamber 4, the material enters the drying chamber 7, in which its moisture content is adjusted to one of the known drying methods, for example, by blowing with hot-air.

Thus, applying the described scheme, it is possible to increase the efficiency of the device due to a more rational use of generator energy and to improve the quality of textile processing. The radiation at the output of the installation is reduced by almost 2 times compared with the prototype.

Claims (2)

1. An apparatus for liquid and heat treatment of a moving textile material, comprising a liquid treatment chamber and a drying chamber arranged in series in the directions of movement of the material, an electromagnetic pulse generator, radio emission suppression filters and a waveguide, characterized in that, in order to improve the quality of processing by increasing The efficiency and intensification of the process, it is equipped with a means to form impulses with a steep front, and the waveguide is designed as a tee, the direct channel of which is connected to the input of the drying chamber and the output of the liquid treatment chamber, and the branch channel is connected to an electromagnetic pulse generator, the means for generating impulses with a steep front being placed in the waveguide at the output liquid processing chamber material. 2. The device according to claim 1, characterized in that the means for forming pulses with a steep front are made in the form of dielectric layers, ferrite, oriented against the direction of the field of the wave, and ferrite, oriented in the direction of the field of the wave, deposited successively on the inner surface of the waveguide at the outlet of the liquid chamber processing. Aa // 7 2