JP3234737B2 - Sludge scraper - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention forcibly restricts the roll and lift of a flight even during an earthquake, and prevents the endless chain from coming off the sprocket wheel to prevent breakage of the flight and cutting of the chain. The present invention relates to a sludge scraper that can be operated smoothly.

[0002]

2. Description of the Related Art In a sewage treatment plant, inflowing sewage is guided to a sedimentation basin, and after solid matter in the sewage, that is, sludge, is settled and removed, sewage is supplied to an aeration tank to perform aeration treatment. After solid-liquid separation of the inflowing sewage in this way, it is common practice to separately treat the solid content and the sewage. And the sludge fraction was precipitated in the sedimentation pond sludge raking plate Der
That was Atsumaridoro into the sludge pit formed in a portion of the precipitation Ikezoko in flight, and to process lead to Ikegai. As a conventional sludge scraper, multiple flights are run over two endless chains running along the length of the pond on both sides of the pond, and sedimentation is achieved by running each flight along the pond bottom. There is a chain flight type that scrapes the sludge that has been collected. In this chain flight type sludge scraper, a guide rail is laid along the bottom of the pond, a sprocket wheel is provided in the water, and a flight provided on an endless chain stretched on the sprocket wheel slides on the guide rail. It works. Each flight is fitted with a shoe that has a small flange that protrudes at the end so that the flight can move exactly along the guide rail. Regulates flight and chain operation to prevent the sprocket wheel from falling off the sprocket wheel unnecessarily.

[0003]

Therefore, by providing the shoes with the collars on the flights, each flight can be accurately operated along the guide rails in normal operation. But,
In an earthquake, especially a large earthquake with a strong seismic intensity, the entire sedimentation basin shakes greatly. Especially if this shaking the travel direction perpendicular to the direction of the endless chain, the endless chain which is installed in the sewage in the settling tank, and the flight lateral turbulence provided on the endless chain this shaking right and left In addition, the flight becomes severe in the vertical direction, and the phenomenon of lifting the flight occurs. When the roll or lift exceeds the limits of the shoe collar, the shoe for each flight comes off the guide rail, and the endless chain comes off the sprocket wheel. The end of the flight by the violent shaking of the damaged up crashing into the inner wall surface of the direct precipitation pond flight, and even if this sludge raking machines generally have been operating even during an earthquake because it is continuously driven Chen There is a disadvantage that it breaks off from the sprocket wheel.

The present invention prevents the endless chain from being disengaged from the sprocket wheel or breaking the flight even if the entire sedimentation basin is largely shaken by a large earthquake or the like and horizontal turbulence or vertical vibration is generated. The purpose is to do.

[0005]

The present invention SUMMARY OF] than those without in order to achieve the above object, in the sludge raking device attached to the main body Cheng multiple flight scrape the precipitated sludge to Ikezoko, precipitation pond Underwater sprocket wheel on the outflow side
Installed along the outer circumference of the
This underwater sprocket
Flight lift due to vibration when guided to the eel
Equipped with a semicircular flight levitation prevention guide to prevent
It is characterized by.

[0006] This sludge scraper is used in the submersible water upstream of the sedimentation basin.
Provided along the outer circumference of the sprocket wheel,
Semi-circular fly to prevent the flight from rising
A large earthquake, etc.
Occurs and the whole sedimentation basin shakes greatly, causing turbulence
Even if downward vibration occurs, the sprocket located above the settling pond
Submersible sprocket wheel below this
Prevents the flight from rising when guided to
Make sure to follow the legitimate trajectory without ascending the flight.
Can be moved along the bottom of the pond,
Breakage of the machine chain and the cutting accident of the main chain
Action can be performed.

In this case, the sludge settled on the bottom of the pond is
Dirt attached to the body chain with a large number of flying flights
Fly on the outside of the flight operation track at the mud rake
Leave a gap between the end of the flight and almost flat with the end of the flight.
With vertical guide strips extending vertically
Side guides can be provided.

As a result, even if a large earthquake or the like occurs and the whole sedimentation basin shakes greatly, and the lateral turbulence and the vertical vibration occur, the roll and lift of the flight are regulated by the side guide. The collision of the flight with the inner wall of the pond can be prevented, and the running locus of the main chain can be secured, so that the main chain does not come off the sprocket wheel.

Also, the side guide is attached to the main body chain.
Can be installed on the outbound and return sides of the attached flight
You.

As a result, the sedimentation basin as a whole is
Main chain is sprocket even if it shakes up and down greatly
It can be prevented from coming off the wheel.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A sludge scraper according to the present invention will be described below with reference to the illustrated embodiment. In the figure, reference numeral 1 denotes a sedimentation basin that guides sewage and separates solid-liquid of solid sludge and filth water. The bottom of the sedimentation basin is slightly dug down at one end in the longitudinal direction of the sedimentation basin 1 to form a hopper. The sludge hopper 2 thus formed is integrally formed, and the sludge settled on the bottom of the pond is scraped by the sludge scraper A of the present invention and discharged out of the pond.

As shown in FIG. 1 and FIG. 2, the sludge scraper A provided in the settling tank 1 has an endless chain-shaped main body chain 31, which extends along the longitudinal direction of the pond on both inner surfaces of the settling tank 1.
., And a driving sprocket wheel 33 driven by the driving device 4 are provided at predetermined positions.
And a plurality of flights 34, which are stretched in a pond and arranged at predetermined intervals in the longitudinal direction of the chain between the opposed endless main body chains 31, 31.
34 ... are attached.

Each of the flights 34 is provided with a shoe 35 so that it can be slid and guided while supporting the load of the flight on a guide rail 5 laid along the longitudinal direction of the pond on the outward path of the endless main body chain. On the return path of the chain, it is guided to the return guide rail 7.

The inner wall of the sedimentation basin 1 facing in the longitudinal direction has a steeply inclined lower part as shown in the figure so that sludge or the like settling at the bottom reaches the bottom of the pond without fail. A side guide 6 for preventing flight sideways is attached to the lower part of the inner wall. In this case, the side guide 6 is provided over the entire length in the longitudinal direction of the sedimentation basin, or at least along the entire operation length along the bottom of the endless chain.

The side guide 6 is divided into a lower side guide 6A and an upper side guide 6B as shown in detail in FIGS. 2 and 3, and the lower side guide 6A is located outside of the flight operation path moving along the bottom of the pond. Body chain 3 between the flight end face
The upper end of a vertical guide piece 61 which extends in the vertical direction substantially parallel to the flight end face with a gap C of such a size as not to be displaced from the sprocket wheels 32, 33 meshed with the sprocket wheel 32, 33 is bent obliquely upward. And the upper end of the oblique piece 62 is fixed to the inner wall surface of the sedimentation tank via a mounting bolt 63.
Is supported by a stay 64 projecting from the inner wall of the pond.
The height H of the vertical guide piece 61 is set to a necessary height corresponding to the flight of the flight together with the main chain when the vertical vibration occurs in the pond due to an earthquake or the like, or more.

The oblique piece 6 connected to the vertical guide piece 61
The angle of inclination of 2 is determined so that even if sludge or the like settles on it, it does not slide down and accumulate on it. The lower guides 6A are arranged on opposing inner wall surfaces of the pond so as to follow the operation trajectory of both end surfaces of the flight.

The upper guide 6B is provided on a guide rail support 8 that supports the return guide rail 7 as shown in FIG. The upper guide 6B is also the lower guide 6
Similarly to A, the upper end of a vertical guide piece 61 provided substantially perpendicularly to the end face of the return-side flight operation locus is slightly inclined, and is bent in a V-shape to continuously connect the oblique pieces 62. The upper end of the oblique piece 62 is a bolt stop 63 on the inner wall surface, and the lower part is a bolt stop 65 on the guide rail support 8, and the gap C between the vertical guide piece 61 and the end face of the return side flight and the vertical guide piece 61 The height H is determined in the same manner as the lower guide 6A.

A return side shoe 37 sliding on the return guide rail 7 is attached to the flight 34 separately from the shoe 35 sliding on the guide rail 5 at the bottom of the pond, and the shoe 37 is provided with a small flange. In addition, precipitation
Pond upstream of the provision of the guide 9 for flight floating prevention along the outer peripheral side has a semi-circular water sprocket wheel 32. Thus, when a flight attached to the chain is guided from the settling tank upstream the upper sprocket wheel downward water sprocket wheel can be reliably prevented from flight by vibrations from being lifted at the semicircular guide 9. And this guide 9 can be protruded from the bearing of the underwater sprocket wheel or protruded from the inner wall of the sand basin.

Accordingly, in the apparatus configured as described above, when the driving device 4 is driven, the main body chain 31 having a large number of flights 34 is rotated, whereby the sludge settled at the bottom of the pond is swept by the flights, Mud is collected in the sludge hopper 2. During normal driving, a predetermined gap is left between the side guides 6A and 6B facing the outside of the flight end face, and the flight is operated without contact. When the entire pond vibrates violently due to the occurrence of an earthquake or the like, the flight sways together with the main chain against the shake due to the turbulence in the lateral direction. At this time, each flight end face comes into contact with the side guide and its lateral amplitude is regulated, so that the running locus of the main chain does not largely shift in the horizontal direction, so that it does not come off from the driven and driven sprocket wheels. .

In addition, the flight moves up and down together with the main body chain in response to the vertical vibration and the horizontal vibration, and the phenomenon of lifting the flight occurs. In this case, the side guide facing the flight end face is provided so as to have a predetermined height in the vertical direction, so that the main body chain only moves up and down in response to the lift of this flight, preventing lateral runout, and sprocket wheel. Is prevented from being disengaged.

[0021]

According to the sludge scraper of the present invention , the sedimentation pond
Installed along the outer circumference of the upstream underwater sprocket wheel
To prevent the flight from rising due to vibration.
With a circular flight levitation prevention guide,
Quake, etc., caused the whole sedimentation basin to shake greatly,
Direction turbulence and vertical vibration,
Underwater sprocket from this sprocket wheel
Of the flight when being guided to the pilot wheel
And ensure correctness without ascending the flight.
Along the trajectory of the pond.
To prevent flight damage and cutting accidents of the main chain.
The operation can be stopped smoothly.

The sludge that has settled on the bottom of the pond
A number of flights to the sludge scraper attached to the main chain.
Between the flight end and outside the flight track
With a gap in the vertical direction that is almost parallel to the end face of the flight
Side guides with vertical guide strips
This will cause a large earthquake, etc.
The body shakes greatly, causing turbulence in the horizontal direction and vertical vibration
The roll and lift of the flight are regulated by the side guide
This prevents a flight from hitting the inside of the pond,
The operation track of the main body chain is also secured, so the main body chain
It does not come off the sprocket wheel.

Further, the side guide is attached to the main body chain.
On the outbound and return routes of the attached flight.
And the entire sedimentation basin shakes vertically
Even if the main unit chain comes off the sprocket wheel.
And can be prevented.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of a sludge scraper of the present invention.

FIG. 2 is an enlarged vertical sectional side view.

FIG. 3 is an enlarged vertical sectional side view of a known example.

[Explanation of symbols]

 A Sludge scraper 1 Sedimentation basin 2 Sludge hopper 31 Endless main body chain 32 Driven sprocket wheel 33 Drive sprocket wheel 34 Flight 35 Shoe 4 Drive device 5 Guide rail 6 Side guide 6A Lower guide 6B Upper guide 61 Vertical guide piece 62 Oblique 7 Return guide rail 8 Guide rail support bracket 9 Guide for flight levitation prevention

Claims (3)

(57) [Claims] 1. An outer periphery of a submersible sprocket wheel on the upstream side of a sedimentation basin in a sludge scraper in which a large number of flights for attracting sludge settled on the bottom of the pond are attached to a main body chain.
And a sprocket located upstream of the sedimentation basin.
To the underwater sprocket wheel below
Prevents the flight from rising due to vibration when guided
A sludge scraper comprising a semicircular flight levitation prevention guide that stops . 2. A large number of sludges settling on the bottom of the pond
A sludge scraper with a flight attached to the main chain
Between the flight end and the outside of the flight track
Vertical direction with a gap and almost parallel to the end face of the flight
Side guides with vertical guide strips
The sludge scraper according to claim 1, wherein the sludge is scraped. 3. The side guide is attached to a main body chain.
On the outbound and inbound flights
The sludge scraper according to claim 2.