JP7336076B2 - Sludge collector - Google Patents

Description

TECHNICAL FIELD The present invention relates to a sludge raking device for raking up sludge deposited on the bottom of a sedimentation tank provided in a sewage treatment facility or a water treatment facility and scum floating on the water surface.

BACKGROUND ART In the treatment of sewage or tap water, a sludge collector is installed in a sedimentation basin to remove impurities such as inorganic matter such as sand and organic matter contained in raw water introduced into the sedimentation basin. As a sludge scraper, a flight plate is attached to an endless chain partly wound around a rotating wheel such as a driving wheel or a driven wheel, and the flight plate circulates by rotating the endless chain in the forward direction. ing.

The endless chain of this sludge raking machine runs on a circular track connecting a scraping track extending along the bottom of the sedimentation tank and a water surface track extending on the water surface side. A sprocket is located at each end portion of each track. The flight plate scrapes up the sludge settled on the bottom of the sedimentation tank when traveling on the bottom of the sedimentation tank, and scrapes up the scum floating on the water surface when traveling on the water surface side.

By the way, in a sedimentation tank equipped with a sludge raking machine, when an earthquake occurs, the water surface of the sedimentation tank undulates greatly (hereinafter referred to as sloshing), which can cause the winding part of the endless chain to come off the sprocket. be.
In Patent Document 1, in a sludge scraper in which a long flight plate runs along a guide rail inside a sedimentation tank as an endless chain runs, the above-mentioned A sludge raking machine is described in which a guide plate is arranged on a guide rail bracket at a position separated from the flight plate along the guide rail so as to regulate the upward movement of the endless chain and the width direction of the pond. It is

JP 2006-326483 A

However, in the device described in Patent Document 1, it is necessary to attach the guide member to the guide rail bracket. In particular, when installing a separate guide plate on the guide rail bracket as a countermeasure against sloshing for the existing sludge scraper that does not have sloshing countermeasures, it is necessary to drill a hole to attach the guide plate to the existing guide rail bracket. is troublesome. The position where this drilling process is performed is in a narrow area about 2.5 to 3m from the bottom of the pond and about 300mm from the side wall of the pond. also unsuitable for

SUMMARY OF THE INVENTION An object of the present invention is to provide a sludge scraper that can prevent an endless chain from coming off a sprocket due to sloshing, is easy to construct, and can shorten the construction period and reduce the construction cost.

In order to solve the above problems, a sludge scraper according to the present invention has a configuration as described below.
In a sludge scraper in which a long flight runs along a guide rail inside a sedimentation tank as the endless chain runs,
an endless chain;
a guide rail; a flight fixed to the endless chain, the flight having flight shoes engaged with the guide rail on its upper and lower surfaces so that the flight travels along the guide rail;
a guide member provided at a position spaced apart from the flight along the guide rail on the outer side of both ends of the flight;
a guide support member fixed to the guide rail and supporting the guide member;
The guide member consists of a vertical guide portion that restricts lateral movement of the flight and a horizontal guide portion that restricts upward movement of the flight,
The guide support member comprises a vertical member and a horizontal member, one end of the horizontal member is fixed to the guide rail, the other end is fixed to the lower end of the vertical member, and the vertical member is mounted on the vertical member. and the upper end of the vertical member is fixed to the vertical guide portion of the guide member,
A sludge raking machine characterized by:

Advantageous Effects of Invention According to the present invention, it is possible to provide a sludge raking machine capable of preventing an endless chain from coming off a sprocket due to sloshing and facilitating the work of installing a guide member.

FIG. 1 is a diagram showing an outline of a sludge scraper according to an embodiment of the present invention. FIG. 2 is a diagram showing the support structure of the guide rails in the sludge scraper of the embodiment of the present invention. FIG. 3 is a diagram showing the positional relationship among guide support members, guide members, guide rails and flights in the sludge scraper of the embodiment of the present invention. FIG. 4 is a diagram showing a structure for attaching guide support members to guide rails in the sludge scraper shown in FIG. FIG. 5 is a diagram showing the structure of flights in the sludge scraper of another embodiment of the present invention. FIG. 6 is a diagram showing the positional relationship between the flight shown in FIG. 5 and the guide support member and the guide member.

The present invention relates to a sludge scraper described in (1) below, and includes the following (2) to (7) as embodiments thereof.
(1) In a sludge raking machine in which a long flight runs along a guide rail inside a sedimentation tank as the endless chain runs,
an endless chain;
a guide rail; a flight fixed to the endless chain, the flight having flight shoes engaged with the guide rail on its upper and lower surfaces so that the flight travels along the guide rail;
a guide member provided at a position spaced apart from the flight along the guide rail on the outer side of both ends of the flight;
a guide support member fixed to the guide rail and supporting the guide member;
The guide member consists of a vertical guide portion that restricts lateral movement of the flight and a horizontal guide portion that restricts upward movement of the flight,
The guide support member is composed of a vertical member and a horizontal member, one end of the horizontal member is fixed to the guide rail and the other end is fixed to the lower end of the vertical member to form the vertical member. A member is erected and supported, and the upper end of the vertical member is fixed to the vertical guide portion of the guide member,
A sludge raking machine characterized by:
(2) The guide member is arranged at a position separated from the side end surface of the flight and the upper end surface of the flight, and when sloshing occurs, the vertical guide portion of the guide member abuts the side end surface of the flight, thereby and the horizontal guide portion of the guide member restricts the upward movement of the flight by coming into contact with the upper end surface of the flight. Arriving.
(3) A pin member is horizontally provided on the side end face of the flight so as to extend toward the side wall of the sedimentation tank, and the vertical guide portion of the guide member is separated from the tip of the pin member. The horizontal guide portion is arranged at a position spaced apart from the upper surface of the pin member, and when sloshing occurs, the vertical guide portion of the guide member comes into contact with the tip portion of the pin member to move the flight laterally. and the horizontal guide portion of the guide member contacts the upper surface of the pin member to restrict the upward movement of the flight. .
(4) The guide member is made of steel having a chevron shape, wherein one side of the chevron-shaped steel forms the vertical guide portion, and the other side of the chevron-shaped steel forms the horizontal guide. The sludge scraper according to any one of (1) to (3) above, which forms a part.
(5) The sludge scraper according to any one of (1) to (4) above, wherein the guide support member is made of shaped steel, and the vertical guide portion of the guide member is fixed to the flange portion of the guide support member. Arriving.
(6) The sludge scraper according to any one of (1) to (5) above, wherein the horizontal member of the guide support member is fixed to the guide rail by a rail clip.
(7) The sludge scraper according to any one of (1) to (6) above, wherein the guide support member is provided at a position close to the guide rail bracket supporting the guide rail.

First, based on FIG. 1, the outline of the sludge collector will be explained.
A sludge scraper 1 according to one embodiment of the present invention, as shown in FIG. A pair of second driven shafts 6 installed near the bottom 4 at a predetermined distance from 5, a pair of drive shafts 7 installed near the water surface of the sedimentation tank 2, and a predetermined distance from the drive shaft 7. a pair of third driven shafts 8 installed near the surface of the water; sprockets 17b, 17c, 17d provided on the first driven shaft 5, the second driven shaft 6, the third driven shaft 8, and the drive shaft 7; It has a pair of endless chains 10 stretched on 17a and circling in the sedimentation tank 2, and a plurality of flights 11 attached in the circulating direction so as to extend over the pair of endless chains 10.

Further, an upper guide rail 12a that abuts against the lower end surface of the flight 11 between the drive shaft 7 and the third driven shaft 8 to guide the traveling of the flight 11, A lower guide rail 12b that contacts the lower end surface of the flight 11 that travels in water and guides the travel of the flight 11; A pond bottom rail 13 is provided to guide the running of the flight 11 running on the bottom part 4. - 特許庁

Next, the supporting structure of the guide rail 12 in the sludge scraper 1 will be described with reference to FIG.
Although the support structure of the upper guide rail 12a will be described below, the support structure of the lower guide rail 12b is the same as the support structure of the upper guide rail 12a.
The upper guide rail 12a may be referred to as the guide rail 12 below.

The sludge scraper 1 has a guide rail bracket 20 whose one end is fixed to a pair of side walls 14 of the sedimentation tank 2 and whose other end supports the upper guide rail 12 from below. A plurality of guide rail brackets 20 are provided at predetermined intervals along the water surface track. One end of the guide rail bracket 20 is fixed to the side wall 14 of the sedimentation tank, and the other end protrudes toward the central part of the sedimentation tank 2 .
The guide rail 12 is placed on the upper surface of the guide rail bracket 20 near the tip in the width direction, and the guide rail bracket 20 supports the guide rail 12 from below.
The flight 11 that slides and travels on the guide rail 12 has a first flight shoe 21 at a position that contacts the guide rail 12 . In addition, a second flight shoe 22 is provided on the upper surface side of the flight 11 .

The first flight shoe 21 contacts and slides on the guide rail 12 when the flight 11 travels on the guide rail 12, and wears out. As a result, it is possible to prevent the flight 11 main body from wearing due to direct contact with the upper guide rail 12 .
The second flight shoe 22 provided on the upper surface of the flight 11 is for the flight 11 to travel along the pond bottom side while being guided by the pond bottom rail 13 .

In the general sludge raking machine shown in FIG. 1, when a large earthquake occurs, the water flow in the sedimentation tank generated by the shaking of the earthquake applies force to the flight 11 and the endless chain 10, and in the conventional device, these move. As a result, the endless chain 10 derails from the sprocket 17 or the flight 11 derails from the guide rail 12. - 特許庁Once derailment/derailment occurs, it leads to a serious accident such as breakage of the flight 11 and breakage of the endless chain 10 .

Therefore, in the sludge scraper 1 of the present invention, the endless chain 10 is prevented from derailing from the sprocket 17 and the flight 11 is prevented from derailing from the guide rail 12, and safe operation is possible even in the event of a large earthquake. It was made to be continued.

1st Embodiment of the derailment prevention mechanism in the sludge scraper 1 of this invention is described based on FIG.
In the present invention, as a member for preventing derailment, guide members 32 for derailment prevention are arranged outside both ends of the running flight 11 .
The guide member 32 in the embodiment shown in FIG. 3 is supported by a guide support member 31 , and this guide support member 31 is fixed and supported by the guide rail 12 .

A method for fixing the guide support member 31 to the guide rail 12 will be described with reference to FIG.
The guide support member 31 consists of a vertical member 31a and a horizontal member 31b.
The vertical member 31a of the guide support member 31 is erected and supported on the horizontal member 31b by attaching a joint plate 34 welded to the lower end thereof to the end of the horizontal member 31b of the guide support member 31 with bolts 33. be.

One end of the horizontal member 31 b of the guide support member 31 is attached to the guide rail 12 . The horizontal member 31b is attached to the guide rail 12 by covering the bottom of the guide rail 12 with the end of the rail clip 35 and fixing the other end of the rail clip 35 to the horizontal member 31b using the bolt 33. can be done.

Next, a method for supporting the guide member 32 with the guide support member 31 will be described.
The guide members 32 are attached to the guide support members 31 so as to be arranged in parallel along the guide rails 12 and outside the side surfaces of both ends of the running flight 11 .
The guide member 32 consists of a vertical guide portion 32a extending vertically and a horizontal guide portion 32b extending toward the center of the sedimentation tank 2. As shown in FIG. Steel having an angle shape can be used as the guide member 32, and for example, commercially available angle steel or H-section steel is preferably used.

In the example shown in FIG. 4, a T-shaped steel is used as the guide support member 31 and an angle steel is used as the guide member 32 .
As shown in FIG. 4, one side of the angle steel serving as the vertical guide portion 32a of the guide member 32 is fixed by welding or bolts to the upper end of the flange of the T-shaped steel of the guide support member 31, and the angle steel of the guide member 32 is fixed. The other side is a horizontal guide portion 32b of the guide member 32. As shown in FIG.

The vertical guide portion 32a of the guide member 32 is separated from the side end surface 11a of the flight 11 by a predetermined distance. As a result, even if a lateral force is applied to the flight 11, the side end surface 11a of the flight 11 abuts against the vertical guide portion 32a and is restricted from moving, and cannot move laterally any further. The separation distance between the vertical guide portion 32a and the side end surface 11a of the flight 11 may be an appropriate dimension as long as the first flight shoe 21 does not derail from the guide rail 12 . For example, derailment can be prevented by setting the distance in the range of 10 mm to 30 mm.

The horizontal guide portion 32b of the guide member 32 is separated from the upper end surface 11b of the flight 11 by a predetermined distance. As a result, even when the flight 11 is pushed up from below by the water flow accompanying the vibration of an earthquake, the upper end surface 11b of the flight 11 hits the horizontal guide portion 32b and its movement is restricted, so that it can no longer move in the vertical direction. , the derailment of the flight 11 can be more reliably prevented.

Stainless steel (SUS material) is preferably used as the material of the guide member 32, but general structural rolled steel (SS material) may be used. Other materials such as resin may be used as long as sufficient strength can be obtained.

The guide support member 31 that supports the guide member 32 is preferably attached at a position close to each guide rail bracket 20 . If the distance between the guide member 31 and the guide rail bracket 20 is large, a large moment is applied to the guide rail 12, which is not preferable.

As the guide support member 31, commercially available angle steel, T-shaped steel or H-shaped steel can be used.
In the example shown in FIG. 4, a T-shaped steel is used as the guide support member 31 and an angle steel is used as the guide member 32 .
Welding or bolts can be used to attach the vertical member 31a of the guide support member 31 to the horizontal member 31b, and rail clips 35 and bolts 33 can be used to attach the horizontal member 31b to the guide rail 12. can.
As described above, one of the characteristics of the present invention is that it is possible to easily install equipment for preventing sloshing in existing water treatment facilities using commercially available materials.

Further, when installing a guide member for preventing sloshing in an existing water treatment facility, it is possible to assemble the guide support member 31 and the guide member 32 in advance at the factory, and attach them to the guide rail 12 at the site of the water treatment facility. can.
Therefore, there is no need to drill a hole in the wall of the sedimentation tank or the bracket 20, so that the operation of attaching the guide member can be performed easily and safely.

The operation of this embodiment configured as described above will be described.
By driving the drive shaft 7 with a motor (not shown), the sprocket 17a attached to the drive shaft 7 rotates and the endless chain 10 goes around. As the endless chain 10 circulates, the flight 11 attached to the endless chain 10 circulates together with the endless chain 10 while being guided by the upper guide rail 12a, the lower guide rail 12b, and the bottom rail 13, and settles on the bottom 4. Sludge and the like in the bottom portion 4 are scraped up into a pit 15 formed in the bottom portion 4. - 特許庁

When an earthquake occurs while driving the device and sloshing occurs, the endless chain 10 near the surface of the water moves up and down and left and right due to the waves.
At this time, the side end face 11a of the flight 11 abuts against the vertical guide portion 32a of the guide member, restricting the lateral movement of the endless chain 10 and preventing the endless chain 10 from derailing from the guide rail 12.
Further, the upper end surface 11b of the flight 11 abuts against the horizontal guide portion 32b of the guide member to restrict the upward movement of the endless chain 10, thereby preventing the endless chain 10 from coming off the sprocket 17.

Next, a second embodiment of the derailment prevention mechanism in the sludge scraper 1 of the present invention will be described with reference to FIGS.
In this embodiment, as shown in FIG. 5, a pin member 40 is provided on the end surface of the flight 11 .
As shown in FIG. 6, the horizontal member 31b of the support member 31 is attached to the guide rail 12 by rail clips 35 and bolts 33. As shown in FIG.
The guide member 32 is fixed to the upper end of the guide support member 31 by welding or bolts.
On the other hand, the vertical guide portion 32a of the guide member 32 is arranged at a distance from the end of the pin member 40, and the horizontal guide portion 32b of the guide member 32 is above the pin member at a distance from the pin member 40. placed.

The operation of this embodiment configured as described above will be described.
When an earthquake occurs while driving the device and sloshing occurs, the endless chain 10 near the surface of the water moves up and down and left and right due to the waves. At this time, the end of the pin member 40 abuts against the vertical guide portion 32a of the guide member 32 to restrict lateral movement of the endless chain 10 and prevent the endless chain 10 from derailing from the guide rail.
In addition, the upper surface of the pin member 40 contacts the horizontal guide portion 32b of the guide member 32 to restrict upward movement of the endless chain 10, thereby preventing the endless chain 10 from coming off the sprocket 17.

Reference Signs List 1 sludge scraper 2 settling tank 3 tank 4 bottom 5 first driven shaft 6 second driven shaft 7 drive shaft 8 third driven shaft 10 chain, endless chain 11 flight 11a side end surface of flight 11b upper end surface of flight 12 guide rail 12a upper guide rail 12b lower guide rail 13 bottom rail 14 side wall of sedimentation tank 15 pit 17, 17a, 17b, 17c, 17d sprocket 20 guide rail bracket 21 first flight shoe 22 second flight shoe 31 guide support member 31a vertical member 31b horizontal member 32 guide member 32a vertical guide portion 32b horizontal guide portion 33 bolt 34 joint plate 35 rail clip 40 pin member

Claims (6)

In a sludge scraper in which a long flight runs along a guide rail inside a sedimentation tank as the endless chain runs,
an endless chain;
a guide rail; a flight fixed to the endless chain, the flight having flight shoes engaged with the guide rail on its upper and lower surfaces so that the flight travels along the guide rail;
a guide member provided at a position spaced apart from the flight along the guide rail on the outer side of both ends of the flight;
a guide support member fixed to the guide rail and supporting the guide member;
The guide member consists of a vertical guide portion that restricts lateral movement of the flight and a horizontal guide portion that restricts upward movement of the flight,
The guide support member is composed of a vertical member and a horizontal member, one end of the horizontal member is fixed to the guide rail and the other end is fixed to the lower end of the vertical member to form the vertical member. A member is erected and supported, and the upper end of the vertical member is fixed to the vertical guide portion of the guide member,
A sludge raking machine characterized by: The guide member is disposed at a position spaced apart from the side end surface of the flight and the upper end surface of the flight, and when sloshing occurs, the vertical guide portion of the guide member abuts the side end surface of the flight, thereby moving in the lateral direction of the flight. 2. The sludge scraper according to claim 1, wherein the horizontal guide portion of said guide member restricts the upward movement of said flight by coming into contact with the upper end surface of said flight. A pin member is horizontally provided on the side end surface of the flight so as to extend toward the side wall of the sedimentation tank, and the vertical guide portion of the guide member is arranged at a position separated from the tip of the pin member, The horizontal guide portion is arranged at a position spaced apart from the upper surface of the pin member, and when sloshing occurs, the vertical guide portion of the guide member abuts against the tip portion of the pin member to prevent lateral movement of the flight. 2. The sludge scraper according to claim 1, wherein said horizontal guide portion of said guide member abuts against the upper surface of said pin member to restrict upward movement of said flight. The guide member is made of chevron-shaped steel, one side of the chevron-shaped steel forms the vertical guide part, and the other side of the chevron-shaped steel forms the horizontal guide part. The sludge scraper according to any one of claims 1 to 3. The sludge scraper according to any one of claims 1 to 4, wherein the guide support member is made of shaped steel, and the vertical guide portion of the guide member is fixed to a flange portion of the guide support member. The sludge scraper according to any one of claims 1 to 5, wherein said horizontal member of said guide support member is secured to said guide rail by a rail clip.

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