JP4398497B2 - Waste melting furnace slag outlet opening bit - Google Patents

Description

  The present invention relates to an opening bit for cutting out a slag discharge port of a waste melting furnace or the like of combustible and noncombustible waste (synthetic resin, glass, metals, etc.).

  Conventionally, in a slag discharge port bit used for opening a melting furnace, a fitting groove is formed at the tip, and a base portion of a cemented carbide chip is fitted into the groove. Also, the outer periphery of the chip is brazed to the bit (for example, Patent Documents 1 and 2).

  The work of inserting the carbide tip into the fitting groove at the tip of the bit was a precision work and required skill, and the excavation work was hindered by the separation of the carbide tip.

  Further, the outer periphery of the cemented carbide tip was fixed to the tip of the bit by welding, or adhesion was carried out with a brass row (Patent Document 2). However, the joining of the cemented carbide tip and the base metal is difficult and requires skill, and there is a problem that welding by soldering is easily removed by heat.

  In either case, there was a problem that the carbide tip was easily separated from the tip end face of the bit during the excavation work due to thermal influence and thermal expansion, and the excavation speed was remarkably reduced by the separation.

JP 2004-156222 A JP-A-10-140960

  The present invention is a bit provided at the tip of a hollow rod of a drifter used for opening a sealant (mud) for a slag discharge port in a waste melting furnace in which the inside of the furnace exceeds 1500 ° C. in a vertical furnace system. It is an object of the present invention to obtain a slag discharge port opening bit that can be used many times in the waste melting furnace.

In order to achieve the above object, the present invention firstly forms a chevron base metal made of a crest line perpendicular to the central axis of the bit in three or four directions on the tip surface of the hollow bit for drilling. A series of hardfacing materials are deposited on both slopes, the top, and the outer end face of the two mountain-shaped slopes , and the hollow bit for drilling is placed on the central axis at the tip of the hollow rod of the drilling machine. A waste melting furnace slag outlet opening bit welded to one body,
Second, a recessed space is formed in a portion of the three-way or four-way angled base metal that gathers on the central axis side, and is inclined from the bottom surface of the space toward the base of the bit toward the outer periphery of the hollow bit. The waste melting furnace slag discharge port opening bit according to the first invention, wherein three or four grooves are formed between the chevron base metal, and a pressure air jet port is opened on each inclined surface of the groove,
Third, the welding melt slag discharge port opening bit according to the first or second invention, wherein the weld deposit is formed by connecting the tops of angled inclined surfaces on both sides in a convex arc shape,
Consists of.

  Therefore, the hardfacing is formed by depositing the top of the three-way or four-way chevron provided at the tip of the hollow rod for drilling attached to the drifter by forming a peak line in a convex arc shape. The three or four chevron surfaces of the Yamagata base made of material abut against the discharge port of the melting furnace, while rotating around the refractory center line of the discharge port while moving forward through the mud of the discharge port The impact-pulverized and powdered powder is discharged from the side of the bit and rod through the groove at the center of the tip of the bit and discharged from the furnace by pressurized air, the outlet is opened, and the melt in the furnace is discharged from the outlet Discharged outside.

The above three-way chevron hardfacing material is distributed in a series and evenly on the outer surface of the three chevron base metal as shown in FIGS. Since the excavation resistance is evenly excavated by the top surface of the mountain and the inclined surfaces on both sides, and the mountain-shaped hardfacing material is integrated with the base metal, there is no risk of falling off from the base metal base due to impact force or heat. .

  Since the present invention is configured as described above, there is no risk of falling of the hardfacing material on the outer end face of the bit, and the refractory at the discharge port can be evenly excavated. There is an effect that can be performed. In addition, there is an effect that the bit can be used many times for the end of the rod and one body at a high temperature exceeding 1500 ° C. in the furnace.

In order to open the sealant 15 '(mud) of the discharge port 15 of the melting furnace 14 shown in FIG. 2 of the combustible (paper, synthetic resin, etc.) and nonflammable (glass, metal) waste, A drifter is provided in the frame so as to be slidable back and forth toward the discharge port 15.
The rotary hollow rod 1 is provided in the drifter toward the discharge port 15 via a shank rod.

  A hollow bit 2 for drilling is welded 6 to the tip of the hollow rod 1 (FIG. 1 (B), FIG. 2, FIG. 4).

  The hollow rod 1 and the hollow bit 2 rotate around a central axis c, and a mountain shape is formed by a peak line 3 perpendicular to the central axis c on the distal end surface of the drilling hollow bit 2 provided at the distal end of the pedestal 2 ′. The base metal 4 is formed in three or four directions from the axis c.

  Then, the hardfacing material 5 is deposited on the angled surfaces 4 ′ and 4 ′ of the three-way or four-way base metal 4, the peak line 3 thereof, and the outer end surface 4 ″ of the mountain-shaped base metal 4.

  The hardfacing material 5 is made of tungsten or stellite, and has a cutting ability equivalent to that of sintered cemented carbide.

  A concave space s is formed in a portion of the three-way angled base metal 4 that gathers on the central axis c side, and is inclined from the bottom surface 8 of the space s toward the outer periphery of the hollow bit 2 toward the base side of the bit 2. 3 or 4 grooves 9 are formed between the chevron base metal 4, a pressure air jet 10 is opened in the lower end side of each of the grooves 9, and the dusting is pedestaled from the side groove 11 of the bit 2. After passing through 2 ', it is discharged to the middle between the outer periphery of the rod 1 and the perforated wall.

  The crests 5 'formed by the welding of the hardfacing material 5 connect the tops 3 of the hardfacing 5 "and 5" of the chevron slopes on both sides in a convex arc shape by the above-mentioned surfacing.

  Accordingly, by operating the drifter, high pressure air is ejected from the hollow rod 1 through the pedestal 2 'through the high pressure air jets 10, 10, 10 of the hollow bit 2, and in this state, the bit 2 is directed toward the opening of the melting furnace. When propelled, the hardfacing material 5 forming the three-side chevron inclined surfaces 4 ′, 4 ′ and the hardfacing material 5 ′, 5 ″ and the convex arc-shaped chevron peak 5 ′ abuts against the mud of the discharge port 15 and is discharged. The outlet 15 can be cut.

  At the time of this excavation, the hardfacing material 5 has the hardfacing 5 ″, 5 ″ of the chevron inclined surface and the convex arc-shaped chevron top 5 ′ uniformly contacted with the mud 15 ′ of the discharge port 15, and the excavation resistance is dispersed. Therefore, there is no fear of partial detachment of the build-up material 5 and the opening is performed sufficiently and safely and promptly.

  5A and 5B, reference numeral 12 denotes a conventional cemented carbide chip, and reference numeral 13 denotes a welding bead of the chip 12.

  A three- or four-sided mountain shape of a hollow bit 2 welded to the tip of a hollow rod 1 having a slag discharge port 15 sealed with a mud material 15 'sealed with a molten material 15' exceeding 1500 ° C. The cured build-up material 5 welded to the base metal 4 is less likely to separate and drop off the build-up material 5, and the discharge port of the waste melting furnace can be cut many times.

1A is a plan view of the opening bit of the present invention, FIG. 1B is a front view thereof, FIG. 1C is a longitudinal sectional view taken along line A-A, and FIG. B) A longitudinal sectional view taken along line B-B. It is a longitudinal cross-sectional view of a melting furnace opening. (A) (b) is a plan view of the opening bit, and (c) (d) is a front view of (b) (b). It is the front view which welded the hollow bit and the hollow rod. (A) is a plan view of a conventional separated hollow bit, and (b) is a front view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Hollow rod 2 Drilling hollow bit 2 'Base c Center axis 3 Mountain top line 4 Yamagata base metal 4' Yamagata inclined surface 4 "Outer end surface 5 Hardfacing material 6 Welding

Claims (3)

A chevron base metal made of a crest line perpendicular to the central axis of the bit is formed on the tip surface of the hollow bit for drilling in three or four directions, and a hardened wall is formed on both chevron inclined surfaces, the top part and the outer end face of each base metal. A waste melting furnace slag discharge formed by depositing a pile of welding materials in a series and with uniform hardness, and welding the above-mentioned hollow bit for drilling to the end of a hollow rod of a rock drill on the central axis. Bit for outlet opening.   A recess space is formed in a portion of the three-way or four-way angled base metal that gathers on the central axis side, and three or more inclined toward the base side of the bit from the bottom surface of the space toward the outer periphery of the hollow bit or The waste melting furnace slag discharge port opening bit according to claim 1, wherein four grooves are formed between the chevron base metal, and a pressure air injection port is opened on each inclined surface of the groove. The waste melting furnace slag discharge port opening bit according to claim 1 or 2, wherein the weld deposit is formed by connecting the tops of angled inclined surfaces on both sides in a convex arc shape.

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