JPH0739925U - Feather root - Google Patents

Abstract

(57) [Summary] [Structure] The receiving groove 5 of the reinforcing member 4 in the blade tip portion 3 of the blade body 1.
Is formed, and the reinforcing body 4 is welded in the receiving groove 5 in a fitted state, and the reinforcing body 4 is attached to the blade main body 1 with a screw 6 to form a blade. [Effect] Since the force of shearing and peeling is not applied to the joint between the blade body and the reinforcement body, the reinforcement body with excellent wear resistance can be stably bonded to the blade edge of the blade body, so It has excellent wear resistance, has a long life and can be replaced less often, and is suitable for use as a rotary blade of a kneader or granulator in a device for treating incinerated ash such as municipal waste or industrial waste. A blade having excellent wear resistance can be provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a blade having excellent wear resistance, which is suitable for use as a rotary blade of a kneader or a granulator in a device for treating incinerated ash such as municipal waste and industrial waste.

[0002]

[Prior art]

 Conventionally, since this type of blade is required to have abrasion resistance, for example, as shown in FIG. 7, the blade tip portion b of the blade body a is cut and the cut portion is welded by overlay welding. 8 is hardened, or as shown in FIG. 8, a blade d of the blade main body a is welded with a reinforcing body d made of cemented carbide or the like by silver brazing or the like, or as shown in FIG. As shown, a coating layer e of tungsten, ceramics or the like is formed on the blade tip portion b of the blade body a to improve the wear resistance of the blade tip portion b of the blade body a.

[0003]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional overlay hardening, it is necessary to make the overlay c smooth, and when the hardness becomes high, the overlay c is cracked and cracks or peeling occur during use. However, it has the inconvenience that the progress of wear is fast, and when welding the reinforcing body d of cemented carbide or the like to the cutting edge portion b with silver brazing or the like, shearing and peeling forces are applied to this welding portion. It has the disadvantage that the reinforcement d will come off at the welded part, and when forming the coating layer e, the coating layer e has a small film thickness, so that the coating layer e will quickly become worn due to long-term use. It has the disadvantage that it does. That is, according to the above-mentioned conventional technique, the blades wear quickly, the number of blade replacements increases, and the blade manufacturing costs and replacement maintenance costs are very high. Then, this invention eliminates the inconvenience of the said prior art, and aims at providing the blade excellent in abrasion resistance.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the blade of the present invention is formed with a receiving groove of a reinforcing body at a blade edge portion of a blade body, welds the reinforcing body in the receiving groove while fitting the reinforcing body with the receiving groove. It is characterized by being screwed or bolted to the blade body.

The blade body is generally formed of steel, stainless steel, a casting or the like. Further, the reinforcing body is generally formed of cemented carbide or the like. As the welding means, silver brazing or the like is generally performed. It is preferable that the blade body is made of steel or stainless steel, the reinforcing body is made of cemented carbide, and these are brazed by silver.

[0006]

[Action]

 Since the receiving groove of the reinforcing body is formed in the blade edge portion of the blade body and the welding is performed while the reinforcing body is fitted in the receiving groove, the stress applied to the reinforcing body can be received by the blade body. As the reinforcement is screwed or bolted to the blade main body, the force applied to the reinforcement is securely received by the blade main body without applying shearing or peeling force to the joint between the blade main body and the reinforcement. Therefore, it is possible to completely prevent the reinforcing body from peeling off from the blade body.

[0007]

【Example】

 An embodiment of the blade of the present invention will be described below with reference to the drawings. The drawing shows an example in which the blade of the present invention is applied to a scraper blade of an incinerator ash solidification device. Fig. 1 is a plan view of the scraper blade, Fig. 2 is a front view of the scraper blade, and Fig. 3 is a side surface of the scraper blade. 4 is an enlarged plan view of the tip of the scraper blade, FIG. 5 is an enlarged front view of the tip of the scraper blade, and FIG. 6 is a sectional view taken along line VI-VI of FIG. In the figure, reference numeral 1 denotes a stainless steel blade main body, which is composed of two rotary blades 2 and 2, and these rotary blades 2 and 2 are each provided with a downward inclination angle in the rotational direction. Oriented, the blade edge portion 3 of each rotary blade 2 is provided with a receiving groove 5 for fitting a reinforcing body 4 made of a cemented carbide alloy such as an impact-resistant tool alloy or a tungsten alloy. The reinforcing body 4 is fitted into each of the receiving grooves 5 by silver brazing. Further, the reinforcing body 4 is preliminarily subjected to hole processing and counterbore processing, and is fixed to the blade main body 1 by a mounting screw 6.

When the scraper blades were attached to a solidification device for incinerated ash and were subjected to blending and granulation work, a reinforcing body made of cemented carbide was welded to the blade edge portion of a conventional blade body with silver solder. In the case of the scraper blade created in this way, the service life was 3 months, but it could be used for more than 1 year.

In the above-mentioned embodiment, the blade of the present invention is applied to the scraper blade of the incinerator ash solidification device, but the blade of the present invention is not limited to such a scraper blade, and various blades can be used. It goes without saying that it can be applied to all blades such as flat blades of a mixing device.

Further, in the above-mentioned embodiment, an example is shown in which the blade body is made of stainless steel, the reinforcing body is made of cemented carbide, and they are welded with silver braze. The invention is not limited to the combination of the blade body and the reinforcing body. For example, the blade body may be made of soft steel or hard steel, or the reinforcing body may be made of CBN or the like.

[0011]

[Effect of device]

 As described above, according to the present invention, the shearing and peeling force is not applied to the joint between the blade body and the reinforcement, and the reinforcement having excellent wear resistance is stably joined to the blade edge of the blade. As a result, it is possible to provide a blade that has better wear resistance than before, has a long life, and can be replaced a few times.

[Brief description of drawings]

FIG. 1 is a plan view of an embodiment of the blade of the present invention.

FIG. 2 is a front view of an embodiment of the blade of the present invention.

FIG. 3 is a side view of an embodiment of the blade of the present invention.

FIG. 4 is an enlarged front view of the tip of the blade.

FIG. 5 is an enlarged plan view of the tip of the blade.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is an explanatory view of a conventional blade.

FIG. 8 is an explanatory view of a conventional blade.

FIG. 9 is an explanatory view of a conventional blade.

[Explanation of symbols]

 1 Blade Main Body 2 Rotor Blade 3 Blade Edge 4 Reinforcement 5 Receiving Groove 6 Mounting Screw

Claims (2)

[Scope of utility model registration request] 1. A blade is formed with a receiving groove for a reinforcing member at the blade edge of the blade main body, and the reinforcing member is welded in a state where the reinforcing member is fitted in the receiving groove, and the reinforcing member is screwed or bolted to the blade main body. Feather that is characterized. 2. The blade according to claim 1, wherein the blade body is made of steel or stainless steel, the reinforcing body is made of cemented carbide, and these are brazed by silver.