JP2013022571A - Sludge scraper having flight passing type rotary body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sludge scraper which is installed in a sedimentation basin or a sedimentation tank in a wastewater treatment facility and provided with a flight passing type rotary body capable of passing through a flight attached to an endless chain.SOLUTION: Regarding the sludge scraper, the flight passing type rotary body includes a rotary body, and a braking part for detecting the light when passing through the flight, releasing breaking of the rotary body to rotate it, and stopping rotation after passing through the flight. The rotary body includes a plurality of fork parts radially extending from the center position, and a space part which is formed between the fork parts and is capable of housing the flight to pass through. On the distal end of each fork part, a flight abutting part to be abutted on the flight and a chain abutting part to be in contact with the endless chain and abutted on the endless chain from above are provided.

Description

  The present invention relates to a sludge scraper having a flight-passing rotator capable of passing a flight attached on an endless chain installed in a sedimentation basin or sedimentation tank in a sewage treatment facility.

Conventionally, for example, an endless chain to which a sludge scraper (flight) of a sludge scraper is attached at intervals in the rotation direction spans a drive rotating body and a driven rotating body that rotate around a horizontal axis. In the sludge scraping machine wound around freely, in the sludge scraping machine disclosed in Japanese Patent Application Laid-Open No. 2009-244102, the non-winding portion of the endless chain with respect to the rotating body is moved from the outer peripheral side of the rotating path to the inside. By pressing toward the peripheral side, tension is applied to the endless chain.
In the above configuration, since the chain abutting portion is pressed onto the endless chain, it is difficult to apply the flight to the sludge scraper that places the flight on the endless chain, and a structure that is arranged on the side has been adopted. .
However, the structure has problems such as that the sludge cannot be scraped sufficiently because the flight is divided into left and right sides of the chain.
Therefore, development of a device that can contact the endless chain attached without dividing the flight left and right from above the endless chain and allow the flight to pass therethrough has been awaited.

Japanese Utility Model Publication No. 61-102204 JP 2009-244102 A

This invention was created in view of the above circumstances, and its first problem is
An object of the present invention is to provide a flight passing type rotating body of a sludge scraper capable of passing a flight while colliding from above an endless chain.
This flight passing rotator can be used at the upper part of the endless chain winding part of the driven sprocket to prevent the endless chain from coming off, and it can be combined with a pressing device at the non-wound part of the endless chain. It can be used as a tensioning device.
Another problem of the present invention is that a tension detecting device is provided with a position detection lever so that the extension state of the chain can be confirmed without draining water, and the sludge scraper is moved by moving the position detection lever. It is to provide a device that can be reversed.

In order to solve the above-mentioned problems, the present invention provides
The endless chain that is stretched between the drive rotating body and the driven rotating body provided in the sludge treatment facility and rotates in the transport direction has many sludge scraping flights spaced apart in the transport direction. In the sludge scraper
The flight-passing rotator is arranged so as to contact the endless chain from above at the part where the endless chain and the driven rotator are wound or the non-wound part separated from the driven rotator.
The flight passing rotator has a rotator and a braking unit that detects a flight when the flight passes and releases the braking of the rotator to rotate and stops the rotation after passing the flight,
The rotating body has a plurality of fork portions extending radially from a center position thereof, and a space portion that is formed between the fork portions and can store a flight that passes therethrough.
The front end of each fork is provided with a flight abutting portion that abuts on the flight, and a chain abutting portion that contacts the endless chain and abuts on the endless chain from above.
In the invention of claim 2,
The rotating body is in contact with the endless chain at the unwrapped part of the endless chain,
The rotating body is pivotally supported by a swinging member that is pivotally attached at a predetermined position on the upstream side in the conveying direction of the endless chain and that is inclined downward toward the downstream side. It is characterized in that a tension is applied to the endless chain of the non-wrapping portion.
In the invention of claim 3,
An abutting piece whose chain abutting portion has an arc-shaped cross section and is slidable with the endless chain, and an abutting rotating portion that is pivotally supported at the tip of the abutting piece and is rotatable in contact with the endless chain Consists of
When the rotating body is in the braking position, one abutting rotating part is in contact with the endless chain, and when the rotating body rotates, the abutting piece part pivotally supporting the abutting rotating part is in contact with the endless chain. Features.
In the invention of claim 4,
The abutting piece part has a side regulating part that regulates the left and right sides of the endless chain to be abutted.
In the invention of claim 5,
A detecting unit that rotates in contact with a tip of a passing flight; a braking unit main body that is displaced integrally with the detecting unit to a braking position or a braking release position of the rotating body; and the braking unit It is characterized by comprising a return weight portion that is integrated with the main body and returns to the original position when passing through the flight.
In the invention of claim 5,
A position detection lever that is integrally interlocked with the rotation shaft of the swing member is provided so that the tip of the position detection lever protrudes in a predetermined posture.

Since it consists of the said structure, there can exist the following effects.
(1) When only the endless chain passes, the endless chain is tensioned by pressing by the chain abutting portion without rotating the rotating body of the tensioning device, and when the flight passes, the flight is stored in the space and the rotating body rotates. Since it can be passed, the endless chain can be pressed regardless of the flight mounting position, mounting height and mounting pitch.
(2) By forming the chain abutting portion with the abutting piece portion and the abutting rotating portion, the abutting rotating portion rotates in contact with the endless chain when passing through the endless chain where the rotating body is braked. Since the abutting piece portion contacts the endless chain during passage, wear of the endless chain during pressing can be reduced.
(3) By providing the side restricting portion on the abutting piece portion, the tensioning device can be provided with a function of preventing the endless chain from coming off.
(4) By providing the position detection lever so that the tip protrudes above the water integrally with the rotation shaft of the swinging member of the tensioning device, the rotating body is displaced by the extension of the endless chain, and the swinging member rotates accordingly. Since the position detection lever tilts in conjunction with the rotation of the swinging member, the extended state of the chain can be confirmed without draining water.
(5) Since the position detection lever is integrally interlocked with the tensioning device, the endless chain can be reversed by moving the position detection lever when the sludge scraper is reversed.

It is the schematic of the sludge scraper installed in the settling pond. It is a side view of the tension device which abbreviate | omitted the braking part of the sludge scraper. It is the same front view. (A) is the front view, (b) is an enlarged view of a braking part. (A) is a side view of a rotating body in a state where a flight is in contact with a detection unit, and (b) is a side view of a state in which a braking unit is omitted. (A) is a side view of a state in which braking of the chain abutting portion is released and the flight is in contact with the flight abutting portion, and (b) is a side view of a state in which the braking portion is omitted. (A) is a side view just before a detection part leaves | separates from a flight, (b) is a side view of the state which abbreviate | omitted the braking part. (A) is a side view of the state where the detection unit is separated from the flight, (b) is a side view of the state where the braking unit is omitted. (A) is a side view of a state where a flight pushes a rotating body, and (b) is a side view of a state where a braking part is omitted. (A) is a side view of a state in which a flight passes through a rotating body and the rotating body is braked, and (b) is a side view of a state in which a braking unit is omitted. It is a side view of the state which combined the rotary body with the driven sprocket.

  Hereinafter, a preferred embodiment of the sludge scraping machine of the present invention will be described with reference to the drawings.

The sludge scraper 10 installed in the settling basin or the settling tank 10A shown in FIGS. 1 to 4 includes a pair of left and right endless chains 20 as endless chains 20 to which the flights 25 are attached at intervals in the pulling direction. Each has a known configuration in which it is rotatably spanned between a drive sprocket S1 and a plurality of driven sprockets S2.
In this embodiment, the endless chain 20 is composed of a synthetic resin chain in which link plates 21 adjacent in the pulling direction are pivotally attached to each other by connecting pins 22 in a posture in which the plate surfaces are along the radial direction of the drive sprocket. In addition, a notch 23 for engaging an engagement pin provided on the drive sprocket is formed on the inner peripheral surface side in the pulling direction at the side edge of the link plate 21.
Here, the synthetic resin chain is not limited to the illustrated notch chain, but can be applied to other known chains.

  In the first embodiment, a tensioning device that applies a tension to a corresponding portion of the endless chain 20 by pressing the endless chain 20 between the sprockets from the outer peripheral side to the inner peripheral side of the transport path of the endless chain 20. 1 is provided.

The tensioning device 1 has a structure in which a pressing means is combined with a flight passage type rotating body. As shown in FIG. 2, the tensioning device 1 is pivotally supported substantially in parallel with the rotation axis of the sprocket at a predetermined position such as a sedimentation basin 10A. The pivot member 11 has an upper end pivotally supported by the pivot P1 and a rotating body 2 pivoted P2 on the shaft 7 at the lower end of the pivot member 11.
The swinging member 11 is pivotally attached to a lower end thereof by a pivot P2 in a state where the upper portion is pivotally attached by a pivot P1 at a predetermined position on the upstream side in the transport direction of the endless chain 20 and is inclined downward. doing.
Thereby, since the rotary body 2 is urged | biased toward the upstream of the endless chain 20 at least by dead weight, the endless chain 20 which faces to a downstream can be pressed from the top.

In order to increase the pressing force, a pressing means 17 may be provided in which an arm 15 is provided integrally with the rotation axis P1 of the swing member 11 and a weight portion 16 is added to the tip.
In FIG. 2, the arm 15 extends horizontally from the pivot P1 in the same downstream direction as the rotating body 2, and the weight portion 16 at the tip can be increased or decreased to adjust the weight.
Thereby, not only the weight of the rotating body 2 but also the weight of the weight portion 16 can be increased or decreased to adjust the tension of the endless chain 20.

In the case of the illustrated example, a position detection lever 9 that is integrally linked to the pivot P1 may be provided.
That is, in a state where the rotating body 2 is installed on the non-wound portion of the endless chain 20, the position detection lever 9 is set to a predetermined posture on the water surface, for example, the tip protrudes vertically.
The position detection lever 9 may be a bent lever as shown in FIG. 1 or a linear lever as shown in FIG.
As a result, when the endless chain 20 is bent and descends toward the downstream side, the biased rotating body 2 is tilted and displaced, and the position detection lever 9 is displaced integrally with the rotation of the pivot P1. Therefore, it is possible to measure the extension state of the endless chain 20 from the outside without draining the water in the sedimentation basin or the tank 10A simply by examining the inclination angle of the position detection lever 9. it can.

  Further, since the position detection lever 9 tilts integrally with the rotating body 2, when the endless chain 20 is rotated in the reverse direction, the position detecting lever 9 is tilted in the reverse direction from the outside to rotate the rotating body 2 endlessly. It is also possible to allow the flight 25 that is traveling backward to pass away from the chain 20.

As clearly shown in FIGS. 2 and 5, the tensioning device 1 rotates the rotating body 2 pivotally supported by the rocking member 11 and the rotating body 2 when the flight 25 passes, and rotates after the flight passes. And a pressurizing means 17 that urges the rotating body 2 toward the endless chain 20 side.
The rotating body 2 is a space in which a plurality of (three in the illustrated example) fork portions 3 extending radially from the position of the pivot P2 serving as the center of rotation and a flight 25 formed between the fork portions 3 and passing therethrough can be accommodated. Part 4.

At the tip of each fork 3, a flight abutting portion 5 that abuts the flight and a chain abutting portion 6 that contacts the endless chain 20 are provided.
In the case of this embodiment, the chain abutting portion 6 includes an abutting piece portion 61 made of an arc-shaped plate that can slide with the endless chain 20, and an endless chain that is pivotally supported at the tip of the abutting piece portion 61. 20 is a roller-shaped collision rotating portion 62 that can rotate in contact with the roller 20.
Here, side plates 61a are integrally formed on the abutting piece portion 61 on the left and right sides. The abutting piece portion 61 and the abutting piece portion 61 are formed in a cross-sectional channel shape so that the endless chain 20 is formed upward and on the left and right sides. It is possible to regulate the position of the chain in progress.
In the present embodiment, a guide piece 65 extending from the abutting piece portion 61 is integrally provided on the outer side of one side plate 61a so as to be able to abut against a brake portion main body 32 described later.

Here, when the rotating body 2 is in a stationary braking position (see FIG. 10), it is at the tip of the abutting piece portion 61 disposed at the lower end (downstream in the conveying direction of the abutting piece portion 61 and the endless chain 20). One abutting rotation part 62 is in the lowest position and is in contact with the endless chain 20, and sequentially presses the endless chain 20 conveyed while rotating.
When the braking of the rotating body 2 is released, the rotating body 2 rotates and the arcuate abutting piece portion 61 that pivotally supports the abutting rotating portion 62 abuts against the link plate 21 of the endless chain 20 in order and presses. (See FIGS. 5 to 9).

  The rotator 2 releases the braking of the braking unit 30 of the rotator 2 when the flight 25 passes, stores the flight 25 in the space 4 provided in the rotator 2, and the front end of the flight 25 is brought into contact with the abutment. The rotating body 2 is rotated by abutting with the flight abutting section 5 at the rear end of the piece 61, and the rotating body 2 is braked by the braking section 30 when the flight 25 passes.

  In the case of the present embodiment, the braking unit 30 includes a detection unit 31 that rotates in abutment with the tip of the flight 25 that passes as shown in FIG. The brake unit main body 32 is displaced to the second braking position or the brake release position, and the urging unit 33 is integrated with the brake unit main body 32 and returns to the original position when the flight 25 passes.

That is, the base end of a pair of arms 35 extending in parallel with the rotating body 2 is fixed to the shaft 7 fixed with the rotating body 2 pivotally attached P2, and the pivot P4 is spanned between the arms. ing.
Then, the pivot P4 is set at a position where it can collide with the flight 25, the tip of which is inclined downward toward the upstream direction of the endless chain 20 in the braking posture of the braking unit 30 and the tip of which is advanced. Yes.

  Moreover, the brake part main body 32 protrudes upward along with the said detection part 31, is bent in the substantially square shape by side view, has the roller 32a at the front-end | tip, and is a part of the rotary body 2 at the time of braking, In this embodiment, the rotating body 2 is braked by abutting against the tip of the guide piece 65 formed integrally with the abutting piece portion 61, and once released from the tip of the guide piece 65, the guide piece 65 is released. The brake part main body 32 that has passed through the tip of the guide member and then returned by the urging force of the urging part 33 rotates with the roller 32a in contact with the outer peripheral surface of the guide piece 65. Thus, the rotating body 2 is braked by abutting against the tip of the guide piece 65 formed in the next abutting piece portion 61.

The urging portion 33 has a base end fixed so as to be interlocked with the pivot P4, and is composed of a lever piece 33a that extends in the downstream direction of the endless chain 20 and is bent into a letter shape. A weight 33b is attached to the detection unit 31, and an urging force is applied to the detection unit 31 and the braking unit main body 32.
A stopper 34 is fixed in the middle of the lever piece 33a.
A support plate 8 extending horizontally from the midway position to the shaft 7 is fixed between the pair of arms 35. When the braking unit 30 returns to the braking posture, the lower end of the stopper 34 abuts. The braking unit 30 can be held in a braking posture against the urging force.

Therefore, as shown in FIG. 5, when the detection unit 31 comes into contact with the ongoing flight 25, the braking unit 30 is tilted by the traction force of the endless chain 20 applied to the flight 25, and integrally with the braking unit main body 32 and the attachment. The urging portion 33 is displaced from the braking position in the braking release direction shown in FIG.
At this time, the brake part main body 32 tilts to the outside of the rotation locus of the chain abutting part 6, and the urging part 33 also gradually tilts outward from the rotary body 2 to rotate the rotating body 2 by the brake part main body 32. And release the braking.

When the braking is released, the flight 25 comes into contact with the rotator 2 and enters the space 4 thereof, and the tip of the flight 25 comes into contact with the flight abutting portion 5 (see FIG. 6). 2 is rotated (see FIG. 7).
When the rotating body 2 is rotated by the flight 25, the roller 32a at the tip of the braking section main body 32 can rotate in contact with the outer peripheral surface of the abutting piece 61 (see FIGS. 7 and 8). .

  When the flight 25 passes through the rotating body 2 and does not come into contact with the flight abutting portion 5, the abutting piece portion 61 that has been in contact with the braking portion main body 32 also passes, and the detecting portion is caused by the weight of the urging portion 33. 31 and the brake part main body 32 return to their original positions, and the lower end of the stopper 34 abuts the support plate 8 to hold the brake part 30 in a braking posture (see FIG. 10).

In this invention, although it was set as a mechanism structure as an example of a braking | braking part, you may use other mechanisms, such as using an elastic member for an urging | biasing part, for example.
The braking unit is provided with a contact or non-contact sensor for detecting the position of the flight 25, and when the sensor detects the intrusion of the flight 25, an actuator of a known automatic braking device provided on the rotating body 2 is operated. The brake may be released, and when the sensor detects the passage of the flight 25, the actuator of the automatic braking device may be operated to perform braking.

Next, as the chain abutting portion 6, only the abutting piece portion 61 may be provided without providing the abutting rotating portion 62.
In this case, when only the endless chain 20 passes, the endless chain 20 passes while sliding on the abutting piece portion 61, but the other configurations are the same as in the above embodiment.

  Further, since the side plate 61a is integrally formed on the left and right sides of the abutting piece portion 61, the abutting piece portion 61 is in contact with the upper surface of the endless chain 20 and moves to the left and right sides. Can be regulated by the side plate 61a, so that the endless chain 20 can be prevented from being removed from the sprocket.

In the first embodiment, the case where the flight passing type rotator is applied to the tensioning device 1 provided in the non-winding portion of the endless chain is illustrated, but it is provided in the portion where the endless chain is wound around the driven sprocket. The prevention device 51 may be used.
The derailment prevention device 51 includes the rotating body 2 and the braking unit 30.
The rotating body 2 and the braking unit 30 are the same as in the first embodiment, but no means for pressing such as a swinging member or a weight is provided.

That is, the rotating body 2 is disposed above the driven sprocket S2 and is disposed at a fixed position where the axes of the two endless chains 20 are parallel with a gap through which the endless chain 20 can pass.
Although the brake unit 30 is not shown in FIG. 11, it has the same configuration as that of the first embodiment, and is used in the description of the first embodiment.
As a result, the endless chain that rotates in the direction by the driven sprocket can be restricted from the side by the pair of left and right side plates 61a formed in the abutting piece 61 to prevent the wheel 25 from being removed. It is possible to pass through the part 4.

  In addition, the present invention is not limited to the above-described embodiments, and it goes without saying that various design changes can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Tension device 2 Rotating body 3 Fork part 4 Space part 5 Flight contact part 6 Chain contact part 8 Support plate 9 Position detection lever 10 Sludge scraper 11 Swing member 20 Endless chain 21 Link plate 22 Connection pin 25 Flight 30 Brake part 31 Detecting part 32 Brake part main body 33 Energizing part 33a Arm 33b Counterweight 34 Stopper 61 Abutting piece part 62 Abutting rotating part 65 Guide piece

In order to solve the above-mentioned problems, the present invention provides
The endless chain that is stretched between the drive rotating body and the driven rotating body provided in the sludge treatment facility and rotates in the transport direction has many sludge scraping flights spaced apart in the transport direction. In the sludge scraper
The flight-passing rotator is arranged so as to contact the endless chain from above at the part where the endless chain and the driven rotator are wound or the non-wound part separated from the driven rotator.
The flight passing rotator has a rotator and a braking unit that detects a flight when the flight passes and releases the braking of the rotator to rotate and stops the rotation after passing the flight,
The rotating body has a plurality of fork portions extending radially from a center position thereof, and a space portion that is formed between the fork portions and can store a flight that passes therethrough.
The front end of each fork is provided with a flight abutting portion that abuts on the flight, and a chain abutting portion that contacts the endless chain and abuts on the endless chain from above.
In the invention of claim 2,
The rotating body is in contact with the endless chain at the unwrapped part of the endless chain,
The rotating body is pivotally supported by a swinging member that is pivotally attached at a predetermined position on the upstream side in the conveying direction of the endless chain and that is inclined downward toward the downstream side. It is characterized in that a tension is applied to the endless chain of the non-wrapping portion.
In the invention of claim 3,
An abutting piece whose chain abutting portion has an arc-shaped cross section and is slidable with the endless chain, and an abutting rotating portion that is pivotally supported at the tip of the abutting piece and is rotatable in contact with the endless chain Consists of
When the rotating body is in the braking position, one abutting rotating part is in contact with the endless chain, and when the rotating body rotates, the abutting piece part pivotally supporting the abutting rotating part is in contact with the endless chain. Features.
In the invention of claim 4,
The abutting piece part has a side regulating part that regulates the left and right sides of the endless chain to be abutted.
In the invention of claim 5,
A detecting unit that rotates in contact with a tip of a passing flight; a braking unit main body that is displaced integrally with the detecting unit to a braking position or a braking release position of the rotating body; and the braking unit It is characterized by comprising a return weight portion that is integrated with the main body and returns to the original position when passing through the flight.
In the invention of claim 6 ,
A position detection lever that is integrally interlocked with the rotation shaft of the swing member is provided so that the tip of the position detection lever protrudes in a predetermined posture.

Claims (6)

The endless chain that is stretched between the drive rotating body and the driven rotating body provided in the sludge treatment facility and rotates in the transport direction has many sludge scraping flights spaced apart in the transport direction. In the sludge scraper
The flight-passing rotator is arranged so as to contact the endless chain from above at the part where the endless chain and the driven rotator are wound or the non-wound part separated from the driven rotator.
The flight passing rotator has a rotator and a braking unit that detects a flight when the flight passes and releases the braking of the rotator to rotate and stops the rotation after passing the flight,
The rotating body has a plurality of fork portions extending radially from a center position thereof, and a space portion that is formed between the fork portions and can store a flight that passes therethrough.
A sludge scraping machine comprising: a flight abutting portion that abuts the flight at a tip of each fork portion; and a chain abutting portion that abuts the endless chain and abuts the endless chain from above. . The rotating body is in contact with the endless chain at the unwrapped part of the endless chain,
The rotating body is pivotally supported by a swinging member that is pivotally attached at a predetermined position on the upstream side in the conveying direction of the endless chain and that is inclined downward toward the downstream side. The sludge scraper according to claim 1, wherein tension is applied to the endless chain of the non-wound portion. An abutting piece whose chain abutting portion has an arc-shaped cross section and is slidable with an endless chain, and an abutting rotating portion that is pivotally supported at the tip of the abutting piece and is rotatable in contact with the endless chain; Consists of
When the rotating body is in the braking position, one abutting rotating part is in contact with the endless chain, and when the rotating body rotates, the abutting piece part pivotally supporting the abutting rotating part is in contact with the endless chain. The sludge scraping machine according to claim 1 or 2, characterized by the above.   The sludge scraper according to any one of claims 1 to 3, wherein the abutting piece portion includes a side regulating portion that regulates the left and right sides of the endless chain to be abutted.   A detecting unit that rotates in contact with the tip of a passing flight; a braking unit main body that is displaced integrally with the detecting unit to a braking position or a braking release position of the rotating body; and the braking unit main body The sludge scraping machine according to any one of claims 1 to 4, further comprising a return weight portion that is integrally linked with the return weight portion and returns to the original position when the flight passes.   The sludge scraper according to any one of claims 2 to 5, wherein a position detection lever that is integrally interlocked with a rotation shaft of the swing member is provided so that a tip of the position detection lever protrudes in a predetermined posture.

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