JP2923417B2 - Sewage treatment machine with wear-resistant shoes and wear-resistant rails - 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 flight conveyor, a sludge scraper and the like, in which a shoe and a rail are provided with a wear-resistant shoe and a wear-resistant rail. The present invention relates to a sewage treatment machine provided with a wear-resistant shoe and a wear-resistant rail in which both rails have improved wear resistance.

[0002]

2. Description of the Related Art In a sewage treatment process, a large amount of sand particles are mixed in a treatment tank provided with a sand-lifting machine, a flight conveyor, a sludge scraper and the like located relatively in the first half. The bucket of the sand-lifting machine, the flight conveyor, the flight of the sludge scraper, etc. slide and move while supporting the load on the rails laid along the longitudinal direction of the pond bottom, and perform the desired work. I do. When the buckets, flights, and the like slide on the rails, the sliding friction due to the mixed sand and the like is severe. For this reason, a shoe is attached to a sliding portion that comes into contact with the rail so that the bucket, the flight, and the like do not wear directly, and the shoe is replaced to achieve wear resistance of the bucket, the flight, and the like. The material used for the shoe is generally from ordinary cast iron (FC20) to spheroidal graphite cast iron (FCD60) having good wear resistance.

[0003]

In the case of sewage containing chlorine ions, sulfate ions, sand, etc., ordinary cast iron shoes have insufficient corrosion resistance and wear resistance. Often need to be replaced,
It takes a considerable amount of time to replace the shoe. In addition, as an improvement measure against corrosion deterioration, SUS304 is applied to the shoe and SUS304 is applied to the rail surface.
Although a method of stretching a thin plate made of steel has been proposed, it is not very effective. It is also conceivable that the entire shoe is made of ceramic.However, as a characteristic of ceramic, even though it has extremely high hardness and excellent corrosion and wear resistance, it has low fracture toughness and is brittle. In addition to the problem that it is weak to impact and cannot be used, there is a problem that it is difficult to process it into a complicated shape and the cost increases.

According to the present invention, a shoe and a rail used in a sewage treatment machine such as a sand-lifting machine and a sludge scraper are made of a material having excellent abrasion resistance, and by appropriately combining the shoe and the rail, the shoe and the abrasion-resistant shoe are used. It is an object of the present invention to provide a sewage treatment machine capable of improving rail life and reducing noise.

[0005]

In order to achieve the above object, a sewage treatment machine according to the first aspect of the present invention includes a shoe used for a sewage treatment machine such as a sand-lifting machine or a sludge scraper, and a shoe rail. In a sewage treatment machine provided with a wear-resistant shoe made of ceramic integrally provided on the sliding contact surface and a wear-resistant rail made of a material having high hardness, A ceramic sprayed rail formed by spraying ceramic on the sliding contact surface is used. In order to achieve the same object, the sewage treatment machine of the second aspect of the present invention employs a shoe used for a sewage treatment machine such as a sand-lifting machine or a sludge scraper, and a ceramic on a sliding contact surface of the shoe with a rail. In a sewage treatment machine provided with a wear-resistant shoe made integrally and a wear-resistant rail made of a material having high hardness, a self-fluxing alloy is provided on the rail, in a sliding contact surface with the shoe of the rail. Is characterized by using a self-fluxing alloy sprayed rail formed by spraying.

[0006]

The sewage treatment machine provided with the wear-resistant shoe and the wear-resistant rail is provided with a shoe provided on a sliding portion of a bucket such as a bucket of a sand-lifting machine or a flight of a sludge scraper, and the rail of the shoe body. 1 or 2 on the sliding surface
At least one piece is embedded so as to be embedded, and the rail to which this shoe slides is a ceramic sprayed rail,
Since a self-fluxing alloy sprayed rail is used and used in combination, the corrosion resistance and wear resistance of both the shoe and the rail are improved, and the life of the shoe and the rail can be extended and noise can be reduced.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sewage treatment machine having a wear-resistant shoe and a wear-resistant rail according to the present invention will be described below with reference to the illustrated embodiment. The embodiment shown in FIGS. 1 to 6 is a sand-lifting machine A, which is an endless sand-lifting machine in a water tank 1 in the longitudinal direction along the bottom and the water surface as shown in FIGS. And a bucket 3 is attached to the chain at required intervals, and the bucket 3 is moved along the bottom,
It collects the sediment that has settled at the bottom, scrapes it and discharges it. When the bucket 3 slides and moves on the rail 5 laid on the bottom of the water tank 1,
In order to prevent the bucket 3 from being worn, the shoe 4 is attached to the sliding contact surface with the rail 5.

The shoe 4 can have various shapes as shown in FIGS. The shoe 4 includes a shoe main body 40 and a ceramic sliding body 41 provided on a sliding contact surface with the rail 5. The shape of the shoe main body 40 is a required size and shape suitable for attachment to the bucket 3, and the material is the same as the conventional one, from ordinary cast iron to spheroidal graphite, or formed using stainless steel or the like. Alternatively, molding is performed using rubber or synthetic resin having the required strength and elasticity.

Mounting flanges 42, 42 are integrally provided on both sides of the elastic shoe body 40 made of cast iron or the like, and the inside of the shoe body 40 is thicker than the mounting flanges 42, 42.
A ceramic sliding body 41 is integrally provided so as to be exposed on the contact surface with the rail 5. The size of the ceramic sliding body 41 is determined so as to cover the entire surface in sliding contact with the rail 5, and as shown in FIG. As shown in FIG. 1, it is cast and integrated. In this case, the ceramic sliding body 41 is a single shoe main body 40.
In some cases, there is a case in which the number is divided into two or three or more as shown in FIG. When two ceramic slides 41 are used, they are arranged in parallel, while three or more ceramic slides 4 are used.
When 1 is used, it can be arranged in any arrangement method such as a staggered pattern and an aligned pattern.

The ceramic sliding body 41 is manufactured separately from the shoe body 40 and has a trapezoidal cross section, and the fitting groove 4M of the ceramic sliding body 41 is formed in the shoe body 40 in a dovetail shape. It can be formed and fitted and fixed in this fitting groove 4M. In this case, as shown in FIG. 3A, one end of the fitting groove 4M, that is, the front side in the sliding direction of the shoe 4 is opened and the rear side is closed, or as shown in FIG. In addition, the fitting groove 4M has an inverted tapered shape in which the front surface side of the shoe 4 is wide and the rear surface side is narrow, so that when the shoe 4 is mounted on the bucket 3 and used, the ceramic sliding body 41 falls off from the shoe body 40. Try to prevent

Further, when the shoe 4 is attached to the bucket 3, a fitting groove 4M is provided in a direction orthogonal to the sliding direction of the shoe body 40, and a ceramic sliding body 41 is inserted into the fitting groove 4M. Both ends may be supported in a stopper-like manner by stoppers fixed to the shoe body 40, or the ceramic sliding body 41 may be fixed to the shoe body 4 with mounting bolts.
It is also possible to fix to 0.

FIG. 7 to FIG. 10 show an embodiment of a waste sand scraper B in which an endless chain 2 is stretched in a water channel 1 along a longitudinal direction thereof, and A large number of flights 6, 6,... Are provided for each required interval, so that the sludge settled at the bottom of the water channel is scraped to the sludge hopper side by the flights 6, 6,.

The shoe 7 attached to the flight 6 includes
The shape of the shoe body 70 matches the shape of the flight 6,
As shown in FIGS. 7A and 7B, the shoe body 70 is provided in the same manner as in the embodiment shown in FIGS.
The ceramic sliding body 71 is fitted and integrated. As shown in FIG. 7 (3), the ceramic sliding body 71 may be formed with a depression so as to slightly fit the tread surface of the rail, as shown in FIG. 7 (3). As shown in 4), two sheets can be stacked.

By the way, ceramic sliding bodies 41, 71
Alumina-based ceramic plates, zirconium oxide-based ceramic plates, and others are used as the ceramic plates used in the above. When the ceramic plates are fitted to the shoe bodies 40 and 70, a silicon-based adhesive or rubber sheet is used. It is preferable that the ceramic is interposed to protect the ceramic from vibration and impact.

The rail 5 is made of a desired material and has a required sectional shape, and is slidably contacted with the chutes 4 and 7 of the rail 5 in order to improve the wear resistance of the sliding contact surface with the shoes 4 and 7. surface,
That is, the tread surface is coated with the hard material 51 by spraying ceramic or self-fluxing alloy.

The method for improving the wear resistance of the sliding surface of the rail 5 with the chutes 4 and 7 is appropriately selected in combination with the shoes 4 and 7.

The wear of the shoes 4 and 7 using ceramic is extremely small, which is understood from the fact that the material is much harder than the metal which is the material of the conventional shoe. For a certain rail 5, ceramic or self-fluxing alloy is used for the sliding contact surface of the rail 5 with the chutes 4, 7, that is, the tread surface, although the conventional carbon steel or cast iron shoe wears the rail. By coating with a hard material by spraying, the corrosion resistance and wear resistance of the rail 5 are improved. The reasons for this are as follows: (1) At the sliding surface between the shoe and the rail, abrasive wear occurs in which sand acts like wear particles, whereas hard ceramic is advantageous, while sand wear on the rail The operation does not change even if the material of the shoe changes. (2) When two kinds of solids such as a shoe and a rail that come into contact with each other are the same kind, strong adhesion occurs and adhesive wear is severe. Therefore, sliding between metals of the same type is the worst,
A combination of metals that easily become an alloy is not preferable.
On the other hand, a combination of different metals and ceramics is advantageous for wear. (3) Generally, it is considered that the better the surface lubricity and the smaller the friction coefficient, the less the wear. The friction coefficient varies depending on the measurement conditions, but the friction coefficient between steel and steel is 0.8 The friction coefficient between steel and cast iron is 0.4 The friction coefficient between alumina and alumina is 0.6 The friction coefficient between stainless steel and ceramic Is 0.48, and the ceramic is considered to be as good as or less than cast iron.

[0018]

According to the sewage treatment machine provided with the wear-resistant shoe and the wear-resistant rail of the present invention, the shoe provided on the sliding portion of the bucket such as the bucket of the sand-lifting machine or the flight of the sludge scraper. One or two or more ceramic sliding bodies are provided on the sliding surface of the shoe body in contact with the rails so as to be embedded, and the rail on which the shoe slides is formed by a ceramic spraying rail, a self-fluxing alloy. Since the thermal spraying rails are used in combination, there are advantages in that the corrosion resistance and wear resistance of both the shoe and the rail are improved, and that the life of the shoe and the rail can be extended and the noise can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a shoe of a sand-lifting machine as a sewage treatment machine provided with a wear-resistant shoe and a wear-resistant rail of the present invention.

FIG. 2 is a front view of the same.

FIG. 3 is a plan view showing an example of a shoe of a sand-lifting machine as a sewage treatment machine provided with a wear-resistant shoe and a wear-resistant rail of the present invention.

FIG. 4 is a cross-sectional view showing an example of a rail of a sewage treatment machine provided with a wear-resistant shoe and a wear-resistant rail of the present invention.

FIG. 5 is a front view showing the sand-lifting machine.

FIG. 6 is a side view of the same.

FIG. 7 is an explanatory view showing an example of a shoe of a sludge scraper as a sewage treatment machine provided with a wear-resistant shoe and a wear-resistant rail of the present invention.

FIG. 8 is a plan view showing an example of a shoe using a plurality of ceramic sliding bodies.

FIG. 9 is a front view showing a sludge scraper.

FIG. 10 is a side view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Waterway 2 Chain 3 Bucket 4 Shoe 40 Shoe body 41 Ceramic sliding body 5 Rail 6 Flight 7 Shoe 70 Shoe body 71 Ceramic sliding body A Sanding machine B Sludge scraper

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 3-56604 (JP, U) JP-A 64-28907 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B01D 21/18

Claims (2)

(57) [Claims] 1. A shoe for use in a sewage treatment machine such as a sand-lifting machine or a sludge scraper, comprising: a wear-resistant shoe made by integrally providing ceramic on a sliding contact surface of the shoe with a rail; In a sewage treatment machine provided with a wear-resistant rail made of a high material, a ceramic sprayed rail obtained by spraying ceramic on a sliding surface of the rail in contact with a shoe is used. Sewage treatment machine with wear-resistant shoes and wear-resistant rails. 2. A shoe for use in a sewage treatment machine such as a sand-lifting machine or a sludge scraper, comprising: a wear-resistant shoe made by integrally providing ceramic on a sliding contact surface of the shoe with a rail; In a sewage treatment machine equipped with a wear-resistant rail made of a high material, a self-fluxing alloy sprayed rail formed by spraying a self-fluxing alloy on the rail in sliding contact with a shoe of the rail is used. A sewage treatment machine equipped with wear-resistant shoes and wear-resistant rails.