SU1430279A1 - Fibre sedimentation chamber - Google Patents

Abstract

The invention relates to the production of building products from mineral wool, namely to installations for forming a mineral wool carpet. The aim of the invention is to improve the quality of the products by uniformly distributing the fiber across the width of the carpet. The camera consists of a housing 1, a receiving conveyor 2 and a suction system 4. The camera is equipped with a perforated frame 3 rotatable around its vertical axis. The frame is installed in the rear part of the housing 1 at an angle of 50-70. to the conveyor 2. The ratio of the total cross-sectional area of the holes of the perforated pipeline to the cross section of the chamber body 1 is 0.03-0.06. 6 Il. &

Description

WITH

about go

with

The invention relates to the production of construction products from mineral wool, which can be used in the industry of thermal insulation constructors. Materials for the production of fibrous, products from a mineral wool carpet.

The aim of the invention is to improve the quality of the products by uniformly distributing the fiber across the width of the carpet.

FIG. 1 shows schematically a fiber deposition chamber, a longitudinal section I in FIG. 2 — view A in FIG. 1; FIG. 3 — view B in FIG. 1, FIG. 4 — a chamber at different installation angles of the hollow frame and a diagram of the interaction of the fiber flows and air jets, a longitudinal section in FIG. 5 and 6 — , options for turning the hollow frame around the vertical axis, view in plan.

The fiber deposition chamber includes a housing 1, a receiving mesh conveyor 2, a rotary hollow perforated frame 3, and a suction system 4, which consists of two sections with fans.

The fiber deposition chamber works as follows.

A jet of melt is fed to the fiber, for example, to a multi-roll centrifuge (not shown), to turn, and to the fiber, which is exposed to a blowing stream leaving the high pressure blowing system (not shown). Simultaneously with the supply of purge air, the spraying agent is sprayed. The flow of the air-fiber mixture moves in the channel formed by the housing 1 of the deposition chamber and the receiving conveyor 2. Under the influence of its own weight and the suction system 4, the fibers are deposited on the net of the conveyor 2, forming a carpet. After the carpet leaves the chamber in several places, the thickness of the carpet is determined by its thickness sensors (not shown). According to the thickness gauge indications, the regulating bodies of the suction system 4 and the rotary perforated frame 3 are affected. The suction system 4 provides an effective effect on the airborne fiber flow in the first half of the deposition chamber, where the thickness of the carpet is relatively small. As the carpet thickness increases and advances to the back of the deposition chamber, the efficiency of the effect of the suction system 4 on the air-fiber flow decreases, and the effect of the air flow coming out of the rotary perforated frame 3 increases. Set of impacts

The Q of the suction system 4 and the swinging frame 3 create the necessary controlled aerodynamic conditions for uniform distribution of the fiber onto the receiving conveyor 2 in width, which is

5- turn allows to achieve a uniform density of the mineral wool carpet and the homogeneity of its structure.

Exit through the frame holes

Q air forms an aerodynamic curtain of the main air-fiber flow in the chamber. The pivoting makes it possible for the air flow out of its openings to turn in the right direction and thereby affect the direction of the main flow, which ensures an even distribution of fibrous particles along the width of the carpet.

The angle of the perforated frame to the conveyor should be 50-70 °. When the angle of inclination is less than 50, an excessive increase in the dimensions of the structure occurs, and when the angle of inclination is more than 70, the formation of uncontrolled vortices and in both cases the improvement of the distribution of fibrous particles across the width of the carpet is not provided. In order to achieve the optimal mode of controlling the direction of the main air-fiber flow, the ratio of the total cross-sectional area of the holes in the perforated frame is limited by the lower limit of 0.03 and the upper limit of 0.06 to the cross-section of the entire chamber. With a value less than 0.03, the efficiency of the impact on the main air-fiber flow is significantly reduced due to the rapid loss of kinetic energy by the air flow coming out of the openings of a small section. With a value of more than 0.06 with respect to the cross section of the entire chamber, the air flow rate increases unnecessarily.

Table 5 shows the results of a comparative assessment of the known and proposed fiber deposition chamber.

0

five

0

five

0

143027.9

reduce the unevenness of the mineral carpet by 5%.

Density across the carpet,

Thus, the use of the proposed fiber deposition chamber as compared to the known one allows

Air

,, View

(riz.2

0

five

Claims (1)

Invention Formula A fiber deposition chamber, predominantly mineral wool, containing a horizontal body with a fiber blowing system, a receiving mesh conveyor and a suction system located under its working branch, in order to improve the quality of the products due to uniform distribution of the fiber across the width of the carpet, it is equipped with a hollow frame connected to the compressed air supply system installed in the rear part of the box with the possibility of changing the angle of inclination to the horizontal within 50-70 and turning around the vertical oh axis, the frame being made with holes directed in the direction of the fiber flow, the ratio of the total cross-sectional area of which to the cross section of the camera body is 0.030, 06. 0 In id 6 L H To sucking benty / / couples Phys.5 fav Fie: Fiz.6