SU948909A1 - Blow head - Google Patents

Description

one

The invention relates to mineral wool production, in particular, devices for producing superfine fibers from silicate melts by inflating them with a jet energy carrier (compressed air or steam) and can be used in the thermal insulation industry, in the production of fiber refractories, and in ferrous and petroleum metallurgy. getting super thin j metal powder.

Nozzles are known for processing mineral or glass melts into super-thin fibers, in particular the Gapa Laval nozzles, which make it possible to achieve supersonic flow rates of energy carriers (7OO-1OOO m / s) at an excess pressure of 7-11 MPa, containing a housing with a pipe for introducing energy. a body, a bit with a hole for feeding the melt and a nozzle, forming an injection nozzle with a body, a pre-heating and a bottom-flow chambers, a C1J diffuser,

Also known is a blow head, comprising a housing with a pipe for introducing energy carrier, a lid with a melt supply opening D11 and a pipe, a pre-heating and a bottom-heating chambers and a cup made on the side of a pre-heating chamber with a variable radius thickening and forming the nozzle f2j with the nozzle.

The disadvantage of these designs of blower devices is the low specific fiber yield and high consumption of energy carrier (up to 8 tons of steam per 1 volt wave).

The closest to the technical essence and the achieved effect to the invention is a blowing head with an injection nozzle, comprising a housing with a nozzle for inputting energy carrier, a cover with an opening for feeding the melt and a nozzle, a pre-heating n sub-blowing chamber, a cup and a resonating cavity in the form of a truncated cone -. much smaller base to the nozzle Sz.

Claims (3)

The additional effect of acoustic oscillations on the melt allows to increase the specific fiber yield up to 80-9О to reduce the pressure of the energy carrier to 2.5-550 MPa (against 7-11 MPa), and to reduce the consumption of energy carrier by 1.5-2 times. The disadvantage of this blow head is loss of function when melt enters the resonating cavity. The aim of the invention is to improve the reliability of the device and intensify the process. The goal is achieved by: “O in a blow head with an injection nozzle, comprising a housing with an inlet for introducing energy carrier, a keyhole with a melt supply opening and an inlet, a pre-heat and under-heat chambers, a cup and a resonant cavity, the rim is installed to form between its base and the bottom of the body an annular gap dividing the resonant cavity of the n. parts, one of which is plugged and the other is connected to the nozzle. In addition, it is advisable that the annular gap was performed in the form of a nozzle. FIG. 1 shows a blow head; in fig. 2 is a graph of injection versus pressure. The blow head comprises a housing 1 with a nozzle 2 for introducing energy carrier a cover 3 with an opening 4 for feeding the melt and a nozzle 5, forming an injection nozzle 6 with a housing 1, a pre-flooding 7 and a sub-sweat 8 of the chamber, a glass 9, a resonant cavity 10 in the form of a truncated cone, facing a smaller base to the nozzle 6, the annular gap 1 dividing the resonant cavity 10 into two parts, one of which 12 is filled, and the other 13 is connected to the nozzle 6. The molten superthin fiber from the melt is produced using the proposed device ohm The energy supply through supplying patch 2 enters the pre-heating chamber 7, then through the annular gap 11 into the resonating cavity 10, which is divided by the gap 11 into two parts 12 and 13. The energy carrier flow fills both parts of the cavity simultaneously, and The flow in the flow part 13, which is connected to the nozzle 6, the velocity of the input of the energy carrier into the resonating cavity can be increased by narrowing the edges of the annular gap (downstream) and giving it any known high-speed nozzle profile. A two-chamber jet generator operating mode is created in the cavity at the flow inlet. With idle blowing of the head with superheated steam, a high injection effect was observed at relatively low pressure of the energy carrier. The high degree of injection in combination with the concealed location of the resonating cavity makes the work of the proposed blow head stable, thereby eliminating generation failure and the associated melt losses during processing. Claim 1. Injection head with an injection nozzle, comprising a housing with a nozzle for introducing energy carrier, a die with an opening for supplying the melt and a nozzle, a pre-heating and a bottom-heating chambers, a cup and a resonating cavity, about a lich. Due to the fact that, in order to improve the reliability and intensification of the process, the overhang is installed with a ring gap between its base and the bottom of the body, dividing the resonant cavity into parts, one of which is plugged, and the other is connected to the nozzle. 2. The head according to claim 1, which means that the annular gap is made in the form of a nozzle. Sources of information taken into account in the examination. 1. L. A. A. Shkolnikov and others. Glass staple fiber. M., Himi, 1969, p. 88 - 112. 2. USSR author's certificate number 56589O, cl. S OZ B 37/06, 1975. 3..Avtorskoe certificate of the USSR № 827429, cl. OZ B 37/06, 1979 (prototype).