CN2404000Y

CN2404000Y - Conical spray gun

Info

Publication number: CN2404000Y
Application number: CN 00216175
Authority: CN
Inventors: 王智
Original assignee: SHANGHAI KAIBAO SPRAY GUN FACTORY
Current assignee: SHANGHAI KAIBAO SPRAY GUN FACTORY
Priority date: 2000-01-18
Filing date: 2000-01-18
Publication date: 2000-11-01
Anticipated expiration: 2010-01-18

Abstract

The utility model relates to a conical spray gun with thickened slag line. A gun core is a seamless steel pipe. The exterior of the gun core is covered with a conical refractory material layer. The utility model is characterized in that the refractory material layer of the middle section of the spray gun is protruded to form a thickening layer; the upper edge and the lower edge of the thickening layer are in conical-transition connection with the original refractory material layer. The utility model has the advantages that the easy melting loss and slag line positions of the spray gun are thickened and reinforced, the melting loss resistance and the flushing resistance abilities of the refractory material of the slag line position immersed in the molten steel are greatly improved, the service life of the spray gun is extended, and the smelting cost is reduced.

Description

Slag line thickens the taper spray gun

The utility model is a kind of desulfurization, dephosphorization winding-up processing or oxygen blown spray gun of carrying out in hot metal pretreatment and molten steel furnace external refining process.

Existing smelting is generally made the rifle core with weldless steel tube with spray gun, wraps up in isometrical refractory materials outward.The common source of damage of this spray gun has melting loss, cracking, rifle core perforating steel pipe, bending etc., wherein melting loss and perforation account for and damage 80% of total amount, when oblique cutting is jetted, the suffered melting loss of slag lining and wash away even more serious than other position, therefore also easier damage.The part that spray gun inserts molten steel in use is 1/3～1/2 of a total length, and the effect of top refractory materials is a protection rifle core steel pipe, contact with molten steel, the melting loss that is not subjected to molten steel with wash away.The spray gun of wrapping up in isometrical refractory materials is outward bored a hole because of the too early melting loss in slag line place and is scrapped the unspoiled refractory materials in top and also scrap thereupon.This just makes material not be fully used, and meaningless the gross weight that has increased spray gun and to the extra investment of lifting gear.

The purpose of this utility model provides a kind of slag line and thickens the taper spray gun, utilizes the principle that does not wait strong design, and damageable zone is thickened, to prolong service life of lance.

The technical solution of the utility model is: a kind of slag line thickens the taper spray gun, the rifle core is a weldless steel tube, wrap up in the taper refractory masses outward, the refractory masses radial protrusion that it is characterized in that the spray gun stage casing forms thickening layer, and all tapered transition of the upper edge of thickening layer and lower edge and original refractory masses is joined.

The utility model has the advantages that at the slag lining of the easy melting loss of spray gun and thicken reinforcement, can improve the anti-melting loss of the slag lining refractory materials that immerses molten steel, the ability of antiscour significantly, thereby prolong the work-ing life of spray gun, reduce smelting cost.

Be further described below in conjunction with embodiment of the present utility model and accompanying drawing thereof.

Fig. 1 is the structure sectional view of embodiment one.

Fig. 2 is an A-A sectional view among Fig. 1.

Fig. 3 is the structure sectional view of embodiment two.

Fig. 4 is a B-B sectional view among Fig. 3.

Fig. 5 is the structure sectional view of embodiment three.

Fig. 6 is a C-C sectional view among Fig. 5.

See Fig. 1, embodiment one shown in Figure 2, a kind of slag line thickens the taper spray gun, the rifle core is a weldless steel tube 1, wrap up in taper refractory masses 2 outward, taper refractory masses 2 is hecaprismo shape, general 89.5 to 89.9 degree that adopt of base cone angle, selected wherein one group of two adjacent face are met the top of the slag as one group, the refractory masses 2 in spray gun stage casing forms thickening layer 3 from meeting top of the slag radial protrusion, the all tapered transition of the upper edge of thickening layer 3 and lower edge and original refractory masses 2 is joined, the axial square of the lower edge of thickening layer 3 and spray gun spout end 4 is from being not more than 1/3rd of spray gun total length, the axial length of thickening layer 3 is not more than 1/2nd of spray gun total length, and the radial thickness of thickening layer 3 is 1/4th to 1/3rd of original refractory masses 2 radial thicknesss in spray gun stage casing.

See Fig. 3, embodiment two shown in Figure 4, a kind of slag line thickens the taper spray gun, the rifle core is a weldless steel tube 1, wrap up in taper refractory masses 2 outward, taper refractory masses 2 is hecaprismo shape, general 89.5 to 89.9 degree that adopt of base cone angle, different is with embodiment one, selected two faces that wherein two opposite groups is adjacent are met the top of the slag as two groups, and the refractory masses 2 in spray gun stage casing is met top of the slag radial protrusion from each group and formed thickening layer 3, and other constitutional features is identical with embodiment one.

See Fig. 5, embodiment three shown in Figure 6, a kind of slag line thickens the taper spray gun, the rifle core is a weldless steel tube 1, wrap up in taper refractory masses 2 outward, it is conical that taper refractory masses 2 is, general 89.5 to 89.9 degree that adopt of base cone angle, the refractory masses 2 in spray gun stage casing forms thickening layer 3 from ring side face radial protrusion, and other constitutional features is identical with embodiment one.

Claims

1, a kind of slag line thickens the taper spray gun, the rifle core is a weldless steel tube, wrap up in the taper refractory masses outward, it is characterized in that the refractory masses radial protrusion in spray gun stage casing forms thickening layer, all tapered transition of the upper edge of thickening layer and lower edge and original refractory masses is joined.

2, slag line according to claim 1 thickens the taper spray gun, and the axial square that it is characterized in that the lower edge of thickening layer and spray gun spout end is from being not more than 1/3rd of spray gun total length, and the axial length of thickening layer is not more than 1/2nd of spray gun total length.

3, slag line according to claim 1 thickens the taper spray gun, the radial thickness that it is characterized in that thickening layer be the spray gun stage casing original refractory masses radial thickness 1/4th to 1/3rd.

4, slag line according to claim 1 thickens the taper spray gun, it is characterized in that thickening layer is positioned at a group of spray gun stage casing and meets on the top of the slag.

5, slag line according to claim 1 thickens the taper spray gun, it is characterized in that the two opposite groups that thickening layer is positioned at the spray gun stage casing meets on the top of the slag.

6, slag line according to claim 1 thickens the taper spray gun, it is characterized in that thickening layer is positioned on the ring side face in spray gun stage casing.