JP2838035B2 - Wear resistant rails in water treatment machines - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sewage treatment machine such as a sand-lifting machine, a sludge scraper, a flight conveyor, etc., which is excellent in corrosion resistance and abrasion resistance on a sliding surface of a rail sliding on a bucket and a flight shoe. The present invention relates to a wear-resistant rail in a sewage treatment machine in which a ceramic is provided to improve the wear resistance of the rail.

[0002]

2. Description of the Related Art In a sewage treatment process, a large amount of sand particles is mixed in a treatment tank provided with a sanding machine, a flight conveyor, a sludge scraping machine and the like which are located relatively in the first half. A bucket, a flight conveyor, a flight of a sludge scraper and the like of a sand-lifting machine perform desired work by sliding while supporting the load on a rail laid along the longitudinal direction of the pond bottom. When the buckets, flights, and the like slide on the rails, the sliding friction of the rail tread surface is severe due to sand and the like mixed therein. For this reason, a shoe is attached to a sliding portion in contact with the rail so that the bucket, flight and the like do not wear directly, and the shoe is frequently replaced to reduce the rail wear. Conventionally, the shoe is normally FCD
The materials and rails are made of rail steel.

[0003]

In the front part of the sewage treatment process, sand and sand enter together with the sewage, so that corrosion and abrasion are severe, and the shoes and rails of the sliding part are frequently replaced until the service life of the equipment is reached. There is a need. For this reason, as an improvement against corrosion and deterioration of the rail and the shoe, the shoe is made of SUS304 and the rail is made of SUS304.
Has been proposed. There is also a method of using a synthetic resin to improve corrosion and abrasion. However, there is a drawback in that a device that comes in with sand causes severe abrasion. Further, for the shoe, it has been proposed to extend the life of the shoe using a ceramic shoe.

The present invention uses a ceramic chip embedded in a sliding surface (tread surface) of a rail to extend the life of a rail which is severely worn due to sliding with a shoe particularly in a device having a lot of sewage. The purpose is to:

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and is intended to improve the abrasion resistance of rails in water treatment machines such as sand lifts, sludge scrapers, and flight conveyors. It is another object of the present invention to prevent ceramics from being broken or dropped by using a ceramic chip embedded in a metal rail, to improve the wear resistance of the rail, and to extend the life of the sewage treatment machine.

[0006]

[Function] A ceramic chip with excellent wear resistance is embedded into the sliding surface (tread surface) of the rail so as to cover the defect that ceramic has low fracture toughness and is easily chipped. It is possible to improve the wear resistance of the rail and extend the life of the rail.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wear-resistant rail in a water treatment machine according to the present invention will be described below with reference to the illustrated embodiment. 4 and 5
The embodiment shown in FIG. 1 is a sand-lifting machine A, which is shown in FIGS. 4 and 5, in which a chain 2 of a sand-lifting machine is stretched endlessly along a water surface in a longitudinal direction in a water tank 1. Attach buckets 3 to this chain at required intervals.
Is moved along the bottom to remove the sediment deposited on the bottom, scrape and discharge. And this sand machine A
In order to prevent the bucket 3 from being worn when the bucket 3 slides and moves on the rail 5 laid on the bottom of the water tank, the shoe 4 is attached to the sliding surface with the rail.

FIG. 6 and FIG. 7 show an embodiment of a sand scraper B, in which an endless chain 2 is stretched in a water channel 1 along the longitudinal direction thereof, and the chain 2 has a required interval. A large number of flights 6, 6,... Are provided every time, so that the sludge settled at the bottom of the water channel is swept toward the sludge hopper side by a flight, and a shoe 7 is provided on the sliding surface of the flight 6 with the rail 5. Attach.

The rail 5 laid on the water channel or the bottom of the water tank of the sand-lifting machine A or the soil sand scraper B can have various shapes as shown in FIGS. The rail 5 includes a rail main body 50 and a ceramic sliding body or ceramic chip 51 provided on a sliding surface of the rail 5, that is, a tread surface. The shape of the ceramic chip 51 is a required size and shape suitable for being embedded in the rail 5 for mounting, and the material of the rail body 50 in which the ceramic chip 51 is embedded is made of a material from ordinary cast iron to spheroidal graphite or stainless steel. Molding using steel or the like,
Alternatively, using a synthetic resin or the like having the required strength and abrasion resistance, it is formed into a shape suitable for a rail used in a sewage treatment machine.

The ceramic chip 51 to be embedded and mounted on the tread surface of the rail 5 has a required size and shape suitable for being embedded in the tread surface of the rail. FIG. 1 shows an example of mounting the cylindrical or disk-shaped ceramic chip 51. The rail body 50 is usually a flat bar made of rail steel or SUS304, and has a width of 30 to 150 mm and a thickness of 6 to 15 mm.
However, this rail body 50 is used as a rail base material 52 having a thickness of 6 to 9 mm, and a flat bar 53 in which a cylindrical ceramic chip is embedded is welded and mounted on the rail base material 52 to be integrated. Things. When the ceramic chip 51 is embedded in the flat bar 53, an embedding hole 54 having a predetermined size is previously formed in the flat bar 53 at a position where the ceramic chip 51 is to be embedded. It is preferable to use an elastic epoxy-based adhesive on the side surface and the bottom surface when fitting them.

In the arrangement of the ceramic chips 51, the interval between the ceramic chips 51 is made smaller than the width of the sliding surface of the shoe, and when a ceramic chip is used for the shoe, it is made smaller than the size of the shoe. A part is supported by a ceramic chip. This state is shown in FIG. 1 (1) and (4). In FIG. 1C, a cylindrical or disk-shaped ceramic chip 51 is arranged in a staggered manner on a rail sliding surface, and a shoe is always supported by one of the rails. It was done. 1 (4), the ceramic chip 51 has a truncated cone shape, and a flat bar 53 is formed.
In addition, it is attached more firmly so that it does not fall off. In this case, the use of an adhesive can be omitted.

FIG. 2 shows an embodiment in which a rectangular ceramic chip 51 is embedded in a flat bar 53 of a rail.
In (1), a parallelogram ceramic chip 51 is embedded so that the shoe is always supported by the ceramic sliding surface. FIG. 2B shows a ceramic chip 51 having a rectangular shape, which is embedded at predetermined intervals, and is used in the same manner as the cylindrical ceramic chip shown in the embodiment of FIG. Further, FIG. 2 (3) shows a case where a somewhat long ceramic bar 55 is formed and continuously embedded in the rail tread surface.

FIG. 3 shows an elliptical or rectangular ceramic chip 51 embedded in a zigzag pattern on the rail tread surface, which also has the same effect as the embodiment of FIGS. By providing a taper as a trapezoid, an adhesive can be made unnecessary. FIG. 8 shows an embodiment of the flight conveyor. As shown in FIG. 8, the flight conveyor can be mounted by using a bent and molded ceramic chip.

Further, as a ceramic for forming the ceramic chip 51, an alumina ceramic plate, a zirconium oxide ceramic plate, a silicon carbide ceramic plate or the like is used.
When the ceramic is fitted, the ceramic may be protected from vibration or impact by interposing an adhesive, filler, or rubber sheet of silicon, epoxy, urethane, or the like.

[0015]

The bucket in the sewage treatment machine of the present invention,
A ceramic chip with excellent corrosion resistance and abrasion resistance is embedded into the sliding surface of the rail that slides with the shoes of the flight etc. As a result, it is possible to reduce the amount of expensive ceramics used, and also to cover the lack of fracture toughness, which is a characteristic of ceramics, to make it more resistant to impacts. The adhesive can be used as it is, and the adhesive can be manufactured even if the processing accuracy is relatively poor, the manufacturing cost can be reduced, and the shock resistance of the adhesive can improve the shock resistance. Has advantages.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a first embodiment of a rail in a sewage treatment machine of the present invention.

FIG. 2 is an explanatory diagram of a different second embodiment.

FIG. 3 is a plan view of a different third embodiment.

FIG. 4 is a front view showing an embodiment of the sand-lifting machine.

FIG. 5 is a longitudinal sectional view of the same.

FIG. 6 is a front view of a shoe for the sludge scraper.

FIG. 7 is a longitudinal sectional view of the same.

FIG. 8 is an explanatory view of an embodiment of a flight conveyor having inclined rails and bent portions.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterway 2 Chain 3 Bucket 4 Shoe 5 Rail 51 Ceramic chip (sliding body) 52 Rail base material 53 Flat bar 54 Embedding hole 55 Ceramic bar 6 Flight 7 Shoe A Sanding machine B Sludge scraper

Claims (1)

(57) [Claims] In a sewage treatment machine such as a sand-lifting machine, a sludge scraper, and a flight conveyor, the sliding surface of a rail that slides on a shoe such as a bucket or a flight is prevented from breaking or missing ceramics. To improve the wear resistance of the rail,
A wear-resistant rail in a water treatment machine characterized by embedding and integrating a ceramic chip having excellent corrosion resistance and wear resistance.