JPH0225773Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a belt cleaner for scraping off deposits on a belt such as a belt conveyor for conveying coke, which is used in a steelworks or the like.

Conventionally, in belt conveyors, etc., deposits that adhered to the belt during use were scraped off by a cleaner 1 made of special steel, etc., as shown in Figure 1. The belt is constantly pressed against the belt surface and scrapes off the deposits on the belt, resulting in severe wear and therefore requires frequent replacement.During this period, the belt conveyor is stopped, reducing work efficiency and requiring manpower to replace it. There were some inconveniences, such as having to do it.

In addition, as a wear-resistant method, it is possible to silver-braze ultra-steel metal such as tungsten carbide to the cleaner 1, but the wear resistance is not sufficient and there are problems such as being expensive and uneconomical. It was hot.

Furthermore, although ceramics can be bonded with adhesive, the adhesive may peel off during use due to the force applied for scraping, heat cycles due to heat generation, or adhesive deterioration, resulting in a short service life. There were some shortcomings.

It is also possible to fix ceramics with bolts, but in this case it is necessary to provide bolt holes in the ceramics, which not only increases costs due to the complexity of the manufacturing method and the difficulty of drilling holes, but also reduces the partial load of the bolted part of the ceramics. There were inconveniences such as damage due to vibration or loosening.

Furthermore, if the ceramic is simply subjected to the usual metallizing treatment and then brazed to the belt cleaner body, depending on the metallizing method, residual stress may be applied to the ceramic in the case of relatively large ceramics such as the belt cleaner. In addition, due to manufacturing difficulties, such as thermal stress cracking due to the difference in thermal expansion with metal during brazing,
It is a very expensive product and is not suitable for use in the field.Also, when the ceramic chips are pasted and protruded from the base as is done conventionally, the brittleness of the ceramic cannot be covered, so it is difficult to scrape off the chips. The ceramics were broken or chipped due to impact, etc., and the ceramics had drawbacks such as being unable to withstand long-term use.

This invention eliminates these drawbacks,
In addition to reducing belt cleaner wear as much as possible,
It has been developed to overcome the brittleness of ceramics, to be strong, wear resistant, and inexpensive, and to easily replace both the metal substrate 2 and the metal substrate 2 when worn out, reducing maintenance and improving work efficiency. It is.

As shown in FIG. 2, the cleaner is made by soldering the entire surface of a ceramic plate 3 whose joint surface is metallized with copper or copper alloy to the cleaner part 5 of a metal substrate 2 consisting of a cleaner part 5 and a mounting part. This belt cleaner has a strong and wear-resistant structure in which a ceramic plate 3 is composited over the entire surface of a portion 5 with a solder layer interposed therebetween.

That is, the ceramic plate 3 has a length of, for example, 100 mm.
A rectangular alumina porcelain with a width of about 10 mm and a thickness of about 4 mm is used for the front and back, and the adhesive surface of the ceramic plate 3 to the metal substrate 2 is metalized by a heat-resistant method or an active metal method, and copper or copper alloy is applied. For example, a metallized layer 4 made of a copper titanium alloy or the like is formed, and this metallized layer 4 is applied to a cleaner portion 5 on the upper part of a rectangular metal substrate 2 having a thickness of several mm, for example.
The entire surface of the cleaner portion 5 is made into a composite with the ceramic plate 3, which is joined by solder of a low-temperature melting soft alloy, with a solder layer of a low-temperature melting soft alloy interposed therebetween.

In this case, FIG. 2 shows that a notch part is provided in the cleaner part 5 of the metal substrate 2 to which the ceramic plate 3 is entirely bonded, and a ceramic plate with a metallized layer 4 applied to the bonding surface is formed in this notch part. A ceramic plate 3 made by bonding 3 with a low-temperature melting soft alloy solder, with a solder layer interposed therebetween.
The ceramic plate 3 is completely embedded in the cleaner portion 5 of the metal substrate 2.

Further, FIG. 3 shows a ceramic plate 3 on which the metallized layer 4 described above is applied on the cleaner portion 5 of the metal substrate 2, which is bonded by soldering in the same manner as described above.
It has a composite structure with a ceramic plate 3 with a solder layer interposed therebetween, and the ceramic plate 3 has a composite shape entirely on the cleaner portion 5 of the metal substrate 2.

In this way, by making the friction part of the metal substrate 2 with the belt conveyor, that is, the cleaner part 5, into a composite structure with a solder layer interposed between the ceramic plate 3 and the metal substrate 2, the ceramic plate 3 In addition to covering the brittleness with the metal substrate 2, the abrasion resistance of the cleaner portion 5 of the metal substrate 2 is greatly improved by the ceramic plate 3, and it can withstand severe mechanical shock when scraping off deposits on a belt conveyor. It does not break or chip, and does not peel off even when used in heat cycles.

In addition, by metallizing the ceramic plate 3 with copper or copper alloy, which is relatively soft among metals, the residual stress on the ceramic plate 3 can be reduced, and when the ceramic plate 3 is bonded to the metal substrate 2, the low-temperature melting alloy can be used. Since the bonding is performed by soldering at a low temperature, the influence of thermal stress on the ceramic plate 3 is small, and the solder layer at the bonding portion absorbs the stress caused by the difference in thermal expansion between the metal substrate 2 and the ceramic plate 3. This prevents thermal stress cracking of the ceramic plate 3 not only during bonding but also during subsequent use, making it possible to bond a relatively large ceramic plate to a metal substrate and preventing stress cracking during subsequent use. ceramic plate 3 without any
It can maintain its scraping function until it is completely worn out, so it can withstand long-term use and requires less maintenance.

To use this belt cleaner, the mounting part of the metal board 2 is bolted to the belt cleaner mounting bracket shown in Fig. 1 so that the ceramic plate 3 faces in the traveling direction of the belt. ,
Installation is very easy.

During use, the cleaner part 5, as described above,
Since the ceramic plate 3 is completely composited, no peeling, breakage, or chipping occurs until the ceramic plate 3 is worn out, and wear does not easily occur.

Even if the metal substrate 2 is worn out due to long-term use, it can be easily replaced for each metal substrate 2 because of the simple plate-shaped structure.

Moreover, it is economical because of its simple structure.

Note that the ceramic plate 3 can be bonded to the metal substrate 2 using a resin adhesive, but as mentioned above, resin adhesives cannot be used in severe applications such as mechanical impact, friction, or frictional heat, such as in belt cleaners. Under such conditions, it is difficult to prevent the phenomenon of peeling during use, and peeling often occurs, resulting in inconveniences such as replacement work each time or work stoppage for replacement.

It is also possible to bolt the ceramic plate 3 to the metal substrate 2, but under usage conditions where friction and vibration are constantly applied, if the bolts become loose, the ceramic plate 3 will vibrate and eventually break and come off. .

Furthermore, in the case of bolting, since it is held by a part of the bolted part, it becomes a partial load, which tends to lead to damage to the ceramic plate 3, and even if the ceramic plate 3 is not damaged, the load will be applied after the ceramic plate 3 is worn out near the bolted part. This has the drawback that the ceramic plate 3 cannot be held and cannot be used thereafter, resulting in a very short service life.

In the case of this application, the ceramic plate 3 is bonded to the cleaner part 5 uniformly over the entire area of the welded surface by metallization, so the impact load and friction load are supported uniformly over the entire surface, so strong loads are applied locally. Never. Moreover, due to metallized bonding,
The bond is very strong and can be used until the ceramic plate 3 is completely worn out without causing partial peeling.

Furthermore, the ceramic plate 3 is heat resistant and wear resistant, and is composited by being fully bonded to the cleaner portion 5 of the metal substrate 2 by soldering. Compared to cleaners, etc., the usable temperature is higher, there is no need to worry about deterioration, and it can withstand long-term use. It also has a simple disposable structure that combines the metal substrate 2 and the ceramic plate 3, so it can be replaced even if it wears out. It has many excellent features such as being easy to manufacture and being economical as a metallized product.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional belt cleaner, Figure 2 is an explanatory diagram of a conventional belt cleaner.
3 are explanatory illustrations of the belt cleaner of the present invention. 1 is a cleaner, 2 is a metal substrate, 3 is a ceramic plate, 4 is metallization, and 5 is a cleaner part.

Claims (1)

[Claim for Utility Model Registration] A ceramic plate whose bonding surface is metallized with copper or copper alloy is soldered to the cleaner portion of a metal substrate consisting of a cleaner portion and a mounting portion, and the entire surface of the cleaner portion is A belt cleaner characterized by a composite structure of ceramic plates with a solder layer in between.