JPH07251156A - Wear-resistant rail in water treating machine - Google Patents

Abstract

PURPOSE:To contrive a long service life of a remarkably worn rail due to be slide with a shoe, in a device having many parts in sewage by embedding ceramic chips on a sliding surface of the rail and using it. CONSTITUTION:In a sewerage treating machines such as a sand elevating machine, a sludge scraping machine and a flight conveyer, the ceramic chips 51 superior in corrosion resistance and wear resistance are integrally embedded in the sliding surface of the rail 5 slid with the shoes such as a bucket and a flight, in order to prevent damage and omission, etc., and improve the wear resistance of the rail 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has excellent corrosion resistance and wear resistance on buckets, flight shoes, and sliding surfaces of rails that slide on rails in sewage treatment machines such as sand lifters, sludge attractors, and flight conveyors. The present invention relates to a wear resistant rail in a sewage treatment machine for improving wear resistance of the rail by providing a ceramic.

[0002]

2. Description of the Related Art In the sewage treatment process, a large amount of sand particles are mixed in a treatment tank provided with a sand lifter, a flight conveyor, a sludge attractor, etc. located relatively in the first half. Then, the bucket of the sand lifter, the flight conveyor, the flight of the sludge scraper, and the like are slidably moved while supporting the load on rails laid along the longitudinal direction of the pond, and perform desired work. When this bucket, flight, or the like slides on the rail, sliding friction on the rail tread is severe due to mixed sand. For this reason, shoes are attached to the sliding parts that come into contact with the rails so that buckets, flights, etc. do not wear directly, and these shoes are often replaced to reduce rail wear. Conventionally, the shoe is normally FCD
Rail steel is used for materials and rails.

[0003]

In the front part of the sewage treatment process, sand enters with the sewage, which causes severe corrosion and wear, and the shoes and rails of sliding parts are often replaced before the service life of the equipment is reached. There is a need. Therefore, as an improvement against corrosion / deterioration of rails and shoes, shoes are made of SUS304 and rails are also made of SUS304 on the surface.
It has been proposed to plate the board. In addition, there is a method of using synthetic resin to improve corrosion and wear, but there is a drawback that the equipment that uses sand causes severe wear. Further, regarding the shoe, it has been proposed to extend the life of the shoe by using a ceramic shoe, and it is desired to extend the life of the rail corresponding to this.

According to the present invention, a ceramic chip is embedded in a sliding surface (a tread surface) of a rail to be used, so that the life of the rail, which is heavily worn due to sliding with a shoe, is increased particularly in a device having a lot of sewage. The purpose is to

[0005]

The present invention has been made to achieve the above object and is intended to improve wear resistance of rails in water treatment machines such as sand lifters, sludge attractors, and flight conveyors. By embedding a ceramic chip in a metal rail and using it, it is possible to prevent the destruction and loss of the ceramic, improve the wear resistance of the rail, and extend the life of the sewage treatment machine.

[0006]

[Function] A ceramic chip with excellent wear resistance is embedded on the sliding surface (tread surface) of the rail and covers the defect of the ceramic, which has a low fracture toughness and is easily chipped, so that it is integrated with the shoe. The wear resistance of the rail can be improved and the life of the rail can be extended.

[0007]

EXAMPLE A wear resistant rail in a water treatment machine of the present invention will be described below with reference to the illustrated example. 4 to 5
The embodiment shown in Fig. 4 is a sand lifter A, in which a bottom 2 of the sand lifter is stretched in a water tank 1 in an endless manner along the water surface in a water tank 1 as shown in Figs. , Bucket 3 is attached to this chain at required intervals, and this bucket 3
Is moved along the bottom, and the dirty sand that has settled at the bottom is taken out, scraped and discharged. And this sand lifter A
In order to prevent abrasion of the bucket 3 when the bucket 3 slides on the rail 5 laid on the bottom surface of the water tank, the shoe 4 is attached to the sliding surface with the rail.

FIGS. 6 to 7 show an embodiment of the 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 space. A large number of flights 6 and 6 are provided for each flight so that the sludge settling on the bottom of the waterway can be scraped toward the sludge hopper side by flight, and a shoe 7 is mounted on the sliding surface of the rail 5 on the flight 6. Install.

The rail 5 laid on the bottom of the water channel or the water tank of the sand lifter A or the sand scraper B can have various shapes as shown in FIGS. 1 to 3. The rail 5 is composed of a rail body 50 and a ceramic sliding body, that is, a ceramic chip 51 provided on a sliding surface of the rail 5, that is, a tread surface. The ceramic chip 51 has a required size and shape suitable for mounting by embedding it in the rail 5, and the rail main body 50 in which the ceramic chip 51 is embedded is made of material such as ordinary cast iron to spheroidal graphite, or stainless steel. Molding using steel,
Alternatively, it may be molded into a shape suitable for a rail used in a sewage treatment machine by using a synthetic resin or the like having required strength and abrasion resistance.

The ceramic chip 51 to be embedded in the tread surface of the rail 5 has a required size and shape suitable for embedding in the rail tread surface, and FIG. 1 shows an example of mounting the cylindrical or disk-shaped ceramic chip 51. The rail body 50 is usually a flat bar of rail steel or SUS304, and has a width of 30 to 150 mm and a thickness of 6 to 15 mm.
However, the rail main body 50 is used as a rail base 52 having a thickness of 6 to 9 mm, and a flat bar 53 having a cylindrical ceramic chip embedded therein is welded and mounted on the rail base 52 to be integrated. It is a thing. 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 embedded, and the ceramic chip 51 is inserted in the embedding hole 54. It is advisable to use an epoxy-based adhesive agent having elasticity for the side surface and the bottom surface when mating.

The arrangement of the ceramic chips 51 is such that the spacing between the ceramic chips 51 is smaller than the width of the sliding surface of the shoe, and when the ceramic chip is used for the shoe, it is smaller than the size, so that the sliding surface is always Part of it is supported by ceramic chips. This state is shown in (1) and (4) of FIG. In addition, as shown in (3) of FIG. 1, cylindrical or disk-shaped ceramic chips 51 are arranged in a staggered manner on the rail sliding surface so that the shoe is always supported by one of the rail ceramic chips 51. It was done. Further, in the one shown in (4) of FIG. 1, the ceramic chip 51 has a truncated cone shape and the flat bar 53
In addition, it is more firmly attached so that it does not fall out, and in this case, the use of 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. Further, in FIG. 2 (2), the ceramic chip 51 is formed in a rectangular shape and embedded at a predetermined interval, and is used in the same manner as the cylindrical ceramic chip shown in the embodiment of FIG. Further, (3) in FIG. 2 shows that a slightly long ceramic bar 55 is formed and continuously embedded in the rail tread.

FIG. 3 shows an oval or rectangular ceramic chip 51 embedded in a rail tread in a zigzag manner. This also has the same effect as that of the embodiment of FIGS. 1 and 2, and the ceramic chip has a cross section. By providing a trapezoidal taper, an adhesive can be eliminated. FIG. 8 shows an embodiment of a flight conveyor, and as shown in this figure, it can be attached to the bent portion of the flight conveyor by using a ceramic chip formed by bending.

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 fitted to, the ceramics may be protected from vibrations and shocks by interposing silicone-based, epoxy-based, urethane-based adhesives or fillers, and rubber sheets.

[0015]

The bucket in the sewage treatment machine of the present invention,
Ceramic rails with excellent corrosion and wear resistance are embedded on the sliding surface of the rail that slides with shoes such as flights to improve the rail's wear resistance by preventing damage and chipping of the ceramic, etc. Therefore, it is possible to reduce the amount of expensive ceramics used, and to cover the lack of fracture toughness, which is a characteristic of ceramics, to make it resistant to impacts. It 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 absorbing effect of the adhesive can be improved. Have advantages.

[Brief description of 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 second different embodiment.

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

FIG. 4 is a front view showing an example of a sand blasting machine.

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

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

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

FIG. 8 is an explanatory diagram of an example of a flight conveyor in which rails are inclined and a bent portion is provided.

[Explanation of symbols]

 1 Water Channel 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 Sand Lifter B Sludge Scraper

Claims (1)

[Claims] 1. In a sewage treatment machine such as a sand lifter, a sludge attractor, and a flight conveyor, ceramics are prevented from being broken or missing on the sliding surface of a rail that slides with shoes of buckets, flights, and the like. To improve the wear resistance of the rail,
A wear resistant rail in a water treatment machine characterized by embedding ceramic chips with excellent corrosion resistance and wear resistance into a single unit.