SU1299989A1 - Fibre-forming device - Google Patents

Abstract

The invention relates to the field of the production of mineral fibers, and more specifically to devices of ejection type dp for producing refractory fibers by the blowing method. The invention is aimed at increasing productivity and improving the quality of the finished product. The voiding device contains a receiving nozzle 1 dp entering the device into the device, a working nozzle 2, made in the form of an annular supersonic nozzle with an oblique cut, in which the pipelines 3 supplying surface-active substances to the flow of energy carrier, the front wall 4, the mounting bolt 5, an opening 6 for introducing surface-active substances into the receiving chamber 7, the channel 8 for supplying energy carrier, the device body 9, cylindrical holes 10, a truncated cone 11 and a barrel-forming chamber 12, shaped in a parabola . The working nozzle 2 is oriented devices at an angle of (-2) - 3 p. 1 Il. (L 11 th

Description

The invention relates to the production of mineral fibers, and more specifically to ejection type devices for producing refractory fibers by the blown method.

The purpose of izbdeteni - increase productivity and improve the quality of the finished product.

The drawing shows a blocking device, a longitudinal section

The fiber-forming device contains a receiving nozzle 1 dp of melt injection into the device, a working nozzle 2, made in the form of an annular supersonic nozzle with an oblique cut, in which pipelines 3 supplying surfactant to the flow of energy carrier, front wall 4, bolt fixing 5, hole 6 dp are located entering the surfactant into the receiving chamber 7, the energy carrier supply channel 8, the housing 9, the cylindrical holes 10, the truncated cone 11 and the fiber-forming chamber 12, shaped on a parabola.

The device works as follows.

The energy carrier (steam, compressed air, inert gas) flows through channel 8 into the device under high pressure. Through the working nozzle 2 and the cylindrical holes 10, it is pulled out at high speed into the fiber-forming chamber 12: from the working nozzle 2 to its initial part, the holes 10 to the final one. After 5-7min the device is ready for operation; In the fiber formation chamber 12, a stable working stream with a high degree of turbulence is formed. After this, the hole 6 is connected to the container with surfactant. Due to the created dilution by the flow of the energy carrier, surfactant begins to flow into the chamber 7 and then through pipelines 3 the surfactant enters the flow of the energy carrier. Since the exit of the pipelines 3 is not clamped, it makes an oscillatory motion, which contributes to the mixing of surfactants

with the energy carrier and is reportedly additionally selected from the conditions for providing the ejector vibration to the flux of the energy effect of processing into the fiber from the other side.

Thereafter, the device is guided by a receiving nozzle 1 to a vertically flowing melt jet at an angle of 90. Due to the created dilution by the working nozzle 2, the melt is drawn into the device through the nozzle 1 and enters

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on the high quality of the melt jet of a given diameter.

The choice of the angles of (-2) - 3 is due to the fact that when the device is in operation, it is necessary to achieve the capture and expansion of the melt jet and the supply of the binder to the fiber-forming zone due to the Energy of the energy carrier. Increase

to the workflow area where

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splitting of the jet and primary stretching of the fibers occurs. After the mixed flow enters the zone of action of the holes 10, which are completed. the spinning of the fibers, as well as the combined flow at the exit from the fiber-forming chamber 12, which allows the non-deformed melt particles to be brought out of the axial zone to the periphery into the active flow zone and to produce fiber spinning from them. The implementation of the working nozzle in the form of an annular supersonic nozzle with an oblique cut, oriented to the axis of the device at an angle oL (-2) - 3,

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0

five

ABOUT

with surfactant supply lines and profiling of the initial section of the fiber-forming chamber along a parabola, it allows creating a strong ejection effect in the receiving nozzle area, creating a stable turbulent flow in which the surfactant is evenly distributed as a finely dispersed medium. This allows one to achieve high-quality crushing of the jet and favorably influences the process of the formation of long and thin fibers.

. The location of the surfactant receiving chamber in the cylindrical part of the body ensures that the required surfactant temperature is constant, entering them into the flow of energy carriers, and also facilitates the technological inspection of the device.

35 Execution of a fiber-forming chamber with a truncated cone at the exit and arrangement in the same plane with its exit section of cylindrical nozzles forming with

0 axis device angle | 3. O-5, allows forming the total flow at the outlet of the device, in such a way that it is possible to mix the flow for the purpose of improved fiber formation, as well as to enhance the ejection effect of the working nozzle and to increase the fiber spinning time.

Number of cylinder nozzles

choose from the conditions for ensuring the ejection effect of processing into fiber

on the high quality of the melt jet of a given diameter.

The choice of the angles of (-2) - 3 is due to the fact that when the device is in operation, it is necessary to achieve the capture and expansion of the melt jet and the supply of the binder to the fiber-forming zone due to the Energy of the energy carrier. Increase

The orientation angle of the working annular nozzle to the axis of the device (for example, up to 5.8) leads to the loss of the ejection capability of the device itself due to the locking of the flow part of the device, and the supply of the binder occurs mainly in the central area of the fiber-forming chamber. This leads to reduced performance and low fiber quality. Increasing the angle oi to the negative side (e.g. (-4) (-7)) also reduces the ejection capability of the device due to the decrease in the amount of active flow in the receiving nozzle area, and the binder enters the cell forming the fiber along its walls and does not spread is uniform over its cross section. It also leads to lower productivity and lower quality of the finished product.

The orientation of the cylindrical nozzles to the axis of the device at an angle of 0-5 is caused by the following. The purpose of these nozzles is to increase the ejection capability of the device, to improve the mixing of the flow at the outlet of the device and to ensure a two-stage quality drawing of the fibers. With increasing angle p in the negative direction, i.e. -2, -5 and on.

The ejection capabilities of the device, namely the proportion of these nozzles in the effect of capture of the melt jet, are lost. The melt particles that are located on the flow axis of the energy carrier are not processed into fibers. Increasing angle: more than (-9) leads to Yu

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Editor M.Tovtin

Compiled by N.Ilinykh

Tehred L. Serdyukova Corrector.Samborska

Order 1115/24 Edition 428 Subscription

VNIIPI USSR State Committee for Inventions and Discoveries 113035, Moscow, Zh-35, Raushsk Iab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

TONfy THAT cylindrical nozzles form a flow of energy carrier that counteracts the main flow formed in the wave formation chamber. In addition, the formation of the total flow at the exit of the device is disturbed and additional energy is required to direct the resulting material into the deposition chamber.

This means that only a combination of the angles ct (-2) - 3 and, with the above signs, allows to achieve the goal.

f5 f o

rmula of invention

A fiber-forming device comprising a housing with a front wall, a melt injection nozzle dp, a working nozzle, an energy carrier supply channel to the working nozzle zone and a binder inlet assembly located in the cylindrical part of the housing, in order to increase productivity and improve quality finished product, the site of the inlet., and the binder is made in the form of an annular cavity connected to the output section of the working nozzle by pipelines located radially on its inner wall, and the working nozzle is oriented but to the axis of the device at an angle of (-2) - 3, the fiber-forming chamber is made in the form of a rotationally curved surface and a coccentric truncated cone joined to it, and the casing is made with cylindrical holes around the larger cone base.

Claims (1)

Claim Fiber-forming device, including a housing with a front wall, a nozzle for introducing a melt, a working nozzle, a channel for supplying energy to the zone of the working nozzle and a binder input unit located in the cylindrical part of the housing, characterized in that, in order to increase productivity and improve the quality of finished products, vvo- node. and the binder is made in the form of an annular cavity connected to the output section of the working nozzle by pipelines located radially on its inner wall, and the working nozzle is oriented to the device axis at an angle of (-2) - 3, and the fiberizing chamber is made in the form of a parabolic surface of revolution and a truncated cone concentrically docked with it, and the body is made with cylindrical holes located around the larger base of the cone.