KR102194916B1 - Sludge collecting apparatus for sedimentation basin - Google Patents

Abstract

The present invention relates to a sludge collection device for a sedimentation basin, and specifically, to a sludge collection device for a sedimentation basin, wherein an auxiliary flight is developed parallel to a flight in the surface part of the sedimentation basin so that a dead area is minimized to increase scum transfer efficiency, and an auxiliary flight is folded with respect to the flight in the bottom surface part so that a sludge collection function of the bottom surface is performed while preventing friction with a haunch structure of the sedimentation basin.

Description

Sludge collection device for sedimentation basin {SLUDGE COLLECTING APPARATUS FOR SEDIMENTATION BASIN}

The present invention relates to a sludge collection device for a sedimentation basin, and in particular, an auxiliary flight is developed parallel to the flight in the surface of the sedimentation basin to minimize the dead area to increase the scum transfer efficiency, and in the bottom surface, the auxiliary flight is folded against the flight. Thus, it relates to a sludge collection device for a settling basin that can easily perform a sludge collection function on the bottom surface while friction with the haunch structure of the settling basin is prevented.

In general, in the process of purifying sewage and wastewater, sludge settling to the bottom of the sedimentation basin and scum floating to the water surface occur simultaneously, and both sludge and scum not only rapidly pollute the water quality over time, but also cause many odors. It can be generated and discharged by being included in the effluent of the sedimentation basin, so it is possible to improve the purification effect of sewage and wastewater only if it is removed quickly.

Therefore, the conventional chain flight type sludge collection device connects a shaft installed between a separate drive unit and the inner wall of the sedimentation basin in a caterpillar shape through a chain and operates so that the flight attached to the chain removes sludge from the bottom and scum from the water surface. It is provided to repeat what to do.

On the other hand, the sedimentation basin is provided to have a triangular haunch structure with a width and height of 300 to 600 mm, respectively, at an angle of 45 to 60 degrees between the floor and the inner wall for safety of reinforced concrete structures.

Therefore, in the chain flight type sludge collecting device, the length of the settling basin in the width direction of the flight is limited to within the width of the floor due to the heonchi structure.

As a result, a dead area equal to the width of the Haunchi structure occurs on the surface of the water, and the scum that has not been treated in this way rises to the top and forms a thick layer on the surface of the water, creating a hotbed for odors, flies, mosquitoes, etc. , There was a problem such as having to remove by periodically putting manpower.

On the other hand, a sludge collector having a simple scum removing means of Patent Publication No. 10-2010-0035238 (2010.04.05.) was proposed, and the proposed sludge collector has two sprockets installed on four axes and two caterpillar collectors. It is provided with a flight and driving device installed at regular intervals on the chain and collector chain, and is provided on a part of both walls of the settling basin in front of the scum remover installed at the rear end of the settling basin, so that a scum guide plate is provided and supported by a support means The scum collected by the flight was removed from the scum remover by always keeping both ends of the flight in close contact with the scum guide plate, but both sides of the flight were provided in a form spaced apart from the haunch part provided on both sides of the sedimentation basin. Accordingly, there was a problem in that the sludge deposited on the bottom of the settling basin was not completely removed.

In addition, there was a problem in that the water quality of the supernatant water was lowered due to this.

Unexamined Patent Publication No. 10-2010-0035238 (2010.04.05.)

In the present invention, the auxiliary flight is folded by the auxiliary flight folding unit, and the auxiliary flight is provided on the collector chain and is infinitely driven by the driving unit. It is developed in parallel to minimize dead area to increase scum transfer efficiency, and because the auxiliary flight has a structure in which the auxiliary flight is folded against the flight, friction with the haunch structure of the sedimentation basin is prevented, while the sludge collection function on the bottom surface is performed smoothly. It is an object of the present invention to provide a sludge collecting device for sedimentation basins that enables high supernatant water quality to be maintained.

The present invention for achieving the above object

A driving unit 100 provided on one side of the settling basin SB;

A collector chain 200 connected to the driving unit 100 so as to be infinitely driven to the other side;

A flight 300 provided in the collector chain 200 so as to have a predetermined interval, and the auxiliary flight 310 rotates at both side ends to enable folding and unfolding; And an auxiliary flight folding unit 400 provided at a portion where the driving direction of the other side of the collector chain 200 is switched, thereby minimizing the dead area on the surface of the sedimentation basin to increase the scum transfer efficiency, and at the bottom surface. It is configured to maintain high supernatant water quality by allowing the sludge collection function to be performed while friction with the structure is prevented.

Therefore, the present invention has the effect that the entire amount of scum evenly floated on the surface of the rectangular settling basin can be transported without deteriorating the performance of the sludge collection function on the bottom surface by the auxiliary flight mounted to be folded and unfolded on both sides of the flight. Can be obtained.

In addition, the deployment method of the auxiliary flight is a simple structure that applies only the rotational action by vertical movement due to gravity and vertical movement due to mechanical action, and reliability and stability of the product can be obtained.

In addition, when the folding and unfolding deployment method of the auxiliary flight is combined with the existing sludge collector flight without a separate driving device, it is possible to obtain an effect of reducing the time and cost required for separate installation.

In addition, since the entire amount of the scum that floats is continuously transferred and removed, it is possible to obtain an effect of preventing the occurrence of odor due to stagnation in the dead area.

In addition, by correcting the meandering of the flight by the sprocket guide, it is possible to obtain the effect of preventing damage to the flight and separation of the chain, reducing the sludge collection efficiency predicted during the repair process when derailment occurs, and preventing the leakage of scum into the supernatant water in advance. have.

And since the sprocket guide has a form that can be divided separately, it is possible to obtain the effect of increasing convenience of attachment and replacement, and repair according to the purpose.

1 is a perspective view showing a sludge collection device for sedimentation according to the present invention.
Fig. 2 is a perspective view showing the main part of the sludge collecting device for sedimentation according to the present invention before the auxiliary flight is folded by the folding disk while the auxiliary flight is spread on the flight.
Figure 3 is an enlarged perspective view showing a state in which the auxiliary flight is separated from the flight in the sludge collection device for sedimentation according to the present invention.
Figure 4 is a perspective view showing a state in which the auxiliary flight is folded to the flight in the sludge collection device for sedimentation according to the present invention.
5 is a perspective view showing a process of unfolding an auxiliary flight folded on a flight in the sludge collection device for a settling basin according to the present invention.
6 is a perspective view showing a state corrected by an unfolding correction piece and an inclined panel during a process of unfolding an auxiliary flight folded on a flight in the sludge collecting device for sedimentation according to the present invention.
Figure 7 is an exemplary view showing the operating state of the sludge collection device for sedimentation according to the present invention.
8 is an exemplary view showing a process of folding an auxiliary flight by a folding disk in the sludge collection device for a settling basin according to the present invention.

Hereinafter, the present invention may apply various transformations and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to a specific embodiment, it is to be understood to include all conversions, equivalents, and substitutes included in the spirit and scope of the present invention.

The present embodiments are provided to describe the present invention in more detail to those of ordinary skill in the art to which the present invention pertains. Therefore, the shape of each element shown in the drawings may be exaggerated to emphasize a more clear description, and in describing the present invention, when it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof Is omitted.

Terms such as first and second may be used to describe various components, but the components should not be limited by terms. The terms are only used for the purpose of distinguishing one component from another component.

The terms used in the present invention are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise.

In the present invention, terms such as "comprises" or "have" are intended to designate the presence of features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, but one or more other features. It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance.

First, the present invention may be configured to include any one of the driving unit 100, the collector chain 200, the flight 300, and the auxiliary flight folding unit 400.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

Referring to Fig. 1,

1 is a perspective view showing a sludge collection device for sedimentation according to the present invention.

The present invention according to an embodiment

A drive unit 100 is provided on one side of the sedimentation basin (SB) having a longitudinal length, and a collector chain 200 is provided to enable infinite driving by being connected to the drive unit 100, and auxiliary flights 310 at both ends ) Is rotated to allow folding and unfolding, and a flight 300 is provided in the collector chain 200 so as to have a predetermined distance, and an auxiliary flight at the portion where the driving direction, which is the other side of the driving unit 100, is switched It is provided to include the folding part 400.

Here, the drive unit 100 is such that the collector chain 200 is infinitely driven inside the settling basin SB, and the drive sprocket 120 is coupled to the drive shaft 111 of the drive motor 110, and the The drive sprocket 120 is provided so that the upper portion of the drive chain 130 is wound, and the lower portion of the drive chain 130 is provided to be wound on the driven sprocket 170 provided on the head shaft 140 of the inner wall of the settling basin. have.

The collector sprocket 150 is divided up and down or left and right, as shown enlarged in FIG. 1, and is coupled to be butted with a bolting (BT) while the head shaft 140 is inserted into the divided interior, so that inspection and replacement are possible. It is provided so that it can be made easily.

The collector sprocket 150 is coupled to the sprocket guide 160 having a disk shape on the outer surface, so that a wear and a skip phenomenon due to the sagging of the collector chain 200 occur when operating for a long time, which is the meandering of the flight 300 In the process of acting as a major cause for the reduction of the collection efficiency of sludge and scum, damage of the flight 300, and the separation of the collector chain 200, the separation and skipping of the collector chain 200 are prevented in advance, By suppressing damage to the flight 300, the sludge collection function can be smoothly performed.

To this end, the sprocket guide 160 is preferably provided to be larger than the diameter of the collector sprocket 150.

The collector chain 200 consists of two rows, and the flights 300 having the auxiliary flights 310 at the top of each are provided to maintain a constant distance along the length direction, and one side of the collector chain 200 It is provided to be engaged with the collector sprocket 150 provided in the driving unit 100, and the other side is engaged with the collector sprocket 150 having the same shape coupled to the idle shaft 410 having the auxiliary flight folding unit 400. It is equipped.

2 and 3,

FIG. 2 is a perspective view showing the main part of the sludge collection device for a settling basin according to the present invention, showing a state before the auxiliary flight is folded by a folding disk in a state where the auxiliary flight is spread on the flight, and FIG. 3 is for a settling basin according to the present invention. It is an enlarged perspective view showing a state in which the auxiliary flight is separated from the flight in the sludge collection device.

The flight 300 is provided on the flight hinges 302 provided at both ends of the flight body 301 so that the auxiliary flights 310 are folded and unfolded, respectively.

"형태로 소정 길이를 갖도록 구비되어 있고, 상기 플라이트 힌지(302)는 중공형태의 힌지홀(302-1)을 갖는 내주연부에 외주연부를 향하여 관통되는 폴딩, 언폴딩 가이드홀(302-2)을 갖도록 구비되어 있다.The flight body 301 has a cross section of "

"It is provided to have a predetermined length in the form, and the flight hinge 302 is a folding, unfolding guide hole 302-2 that penetrates toward the outer circumference of an inner circumferential portion having a hollow hinge hole 302-1) It is provided to have.

The folding and unfolding guide hole 302-2 is provided with an unfolding hole 302-2a having a shape cut to have a predetermined length from the lower end of the flight body 301 to the lower side, and The mode selection hole (302-2b) having a shape inclinedly cut from the top of the folding hole (302-2a) toward the front of the flight body (310) and the flight body (301) at the bottom of the mode selection hole (302-2b). ) Is provided to include a folding hole (302-2c) cut to have a predetermined length toward the upper portion of the).

The unfolding hole (302-2a) and the folding hole (302-2c) are arranged to have a perpendicular shape, so that the auxiliary flight body 313 coupled to the join rod 312 according to the position of the join rod 312 to be described later. ) Is provided so that it can be folded or unfolded.

The auxiliary flight 310 has a female threaded portion 311-1 provided to have a predetermined depth at an outer peripheral portion positioned upward, and a hinge pin 311 provided with a rotating portion 311-2 at the lower end of the hinge The flight body 301 is provided with a joining rod 312 provided to be inserted into the hole 302-1 so as to be reciprocally moved up and down, and having a tightening female screw portion 312-1 spaced apart at regular intervals at the outer periphery of the flight body 301 It is provided so as to be screwed to the female threaded portion 311-1 of the hinge pin 311 through the folding and unfolding guide hole 302-2.

The rotating part 311-2 has a folding piece 311-2a provided in parallel with the joining rod 312 in a direction perpendicular to the lower end of the hinge pin 311, and the folding piece 311- It is provided so that the unfolding correction piece 311-2b is included in a direction perpendicular to 2a).

The joining rod 312 is coupled to fit the auxiliary flight body 313, the auxiliary flight body 313 is provided with a joined rod insertion groove (313-1) so that the joining rod 312 is fitted, The auxiliary flight body 313 so that the threaded through hole 313-2 provided to be aligned with the center of the female screw portion 312-1 of the joining rod 312 is at a right angle to the joined rod insertion groove 313-1. ), and is provided to include a fixing screw 314 which is screwed to the female screw portion 312-1 of the rod 312 that is tightened through the screw through hole 313-2.

The auxiliary flight folding part 400 is provided with an idle shaft 410 rotatably provided and a folding disk 420 provided on the idle shaft 410. At this time, as the folding disk 420 is provided with a folding inclined surface portion 421 extending from the inside to the outside, the folding piece 311-2a of the rotating portion 311-2 is a folding disk 420 ) In the process of passing through the folding hole 302 through the mode selection hole 302-2b from the folding hole 302-2a of the folding guide hole 302-2 by the folding slope 421 At the same time as moving to -2c), the auxiliary flight 310 can be maintained in a folded state at both ends of the flight body 301 of the flight 300.

Referring to Figure 4,

Figure 4 is a perspective view showing a state in which the auxiliary flight is folded to the flight in the sludge collection device for sedimentation according to the present invention.

"형태를 갖는 플라이트 몸체(301)의 방향 이 "

"형태로 바뀌는 가운데 플라이트 몸체(301)의 양측으로 구비된 보조 플라이트(310)에 구비된 힌지핀(311)은 상부와 하부가 바뀜으로써, 회동부(311-2)의 폴딩편(311-2a) 및 언폴딩 보정편(311-2b)이 상부로 위치된 형태가 유지된다. 즉, 플라이트(300)의 플라이트 몸체(301)의 양측단부에 언폴딩된 상태로 있던 보조 플라이트(310)가 폴딩됨에 따라 침전지의 바닥면부로 이동되는 과정에서 헌치 구조물에 접촉되는 것을 방지할 수 있게 된다.The auxiliary flight 310 is that the auxiliary flight 310 is folded by the folding disk 420 of the auxiliary flight folding unit 400, "

"The direction of the flight body 301 having a shape"

"The hinge pin 311 provided on the auxiliary flight 310 provided on both sides of the flight body 301 is changed into a shape, so that the upper and lower parts of the hinge pin 311 are changed, so that the folding piece 311-2a of the rotating part 311-2 ) And the unfolding correction piece 311-2b are maintained in the upper position, that is, the auxiliary flight 310 that was in the unfolded state at both ends of the flight body 301 of the flight 300 is folded. As a result, it is possible to prevent contact with the heonchi structure in the process of moving to the bottom of the settling basin.

5,

5 is a perspective view showing a process in which an auxiliary flight folded on a flight is unfolded in the sludge collection device for a sedimentation basin according to the present invention.

As shown on the right side of FIG. 5, the auxiliary flight 310 is a hinge pin in which the folding piece 311-2a and the unfolding correction piece 311-2b of the rotating part 311-2 are positioned upward. The joining rod 312 screwed to 311 is maintained in a state seated in the lower part of the folding hole 302-2c. At this time, it is possible to maintain a more stable seated state by the self-weight of the auxiliary flight body 313 coupled to the join rod 312 (the auxiliary flight is folded on the flight to scrape the sludge while passing through the bottom of the settling basin. State to remove).

Next, the auxiliary flight 310 is folded to the flight 300 and moved toward the driving unit 100 immediately after passing through the bottom surface of the settling basin, and the flight body 301 of the flight 300 is tilted in a clockwise direction. Then, as the weight of the auxiliary flight body 313 acts on the hinge pin 311 through the joined rod 312, the joined rod 312 exits from the folding hole 302-2c and the mode selection hole 302 In the process of moving along -2b), the direction of the auxiliary flight body 313 is maintained in an unfolded state of about 45° as shown in the middle of FIG. 5.

Next, the flight body 301 of the flight 300 is moved clockwise to be positioned in a vertical form, and at the same time, the joined rod 312 passes through the mode selection hole 302-2b, and then the unfolding hole 302-2a ), the auxiliary flight 310 positioned at both ends of the flight body 301 is maintained in a completely unfolded state so that scum can be removed while passing through the surface portion of the settling basin.

6,

6 is a perspective view showing a state corrected by an unfolding correction piece and an inclined panel during a process of unfolding an auxiliary flight folded on a flight in the sludge collecting device for sedimentation according to the present invention.

The flight body 301 of the flight 300 is vertically positioned by the driving of the driving unit 100 and the joined rod 312 is inserted into the unfolding hole 302-2a, so that the flight body 301 The auxiliary flights 310 located at both ends of the are maintained in an unfolded state, but sometimes the auxiliary flights 310 located at both ends of the flight body 301 are not unfolded due to other causes such as foreign matter. If so, it is provided so as to be corrected by an unfolding correction unit 500 provided at a predetermined distance from the driving unit 100 toward the auxiliary flight folding unit 400.

The unfolding correction unit 500 is provided so that the unfolding correction piece 311-2b abuts, so that the auxiliary flight 310 can be completely unfolded.

The unfolding correction part 500 is provided so that the bracket 510 is fixed to the inner wall of the settling basin, and the support piece 520 is mounted on the bracket 510 to be fixed with a bolting (BT), and the A process in which the unlocking correction piece 311-2b of the rotating part 311-2 is moved as the inclined panel 530 having an inclination angle narrowing from the front to the rear is included on the upper part of the support piece 520 It is provided so that the auxiliary flight 310 is further rotated by the inclined panel 530 so that the state in parallel with the flight body 301 can be maintained.

7 and 8,

Figure 7 is an exemplary view showing the operating state of the sedimentation sludge collection device according to the present invention, Figure 8 is an example showing the process of folding the auxiliary flight by the folding disk in the sludge collection device for a settling basin according to the present invention Is also.

The sludge collecting device for sedimentation according to the present invention includes the drive sprocket 120 of the drive shaft 111, the drive chain 130, and the collector sprocket 150 provided on the head shaft 140 due to the driving of the drive motor 110. As interlocked, the collector chain 200 is infinitely driven.

The flight 300 and the auxiliary flight 310 positioned as the surface portion of the sedimentation basin due to the drive of the collector chain 200 are unfolded, as shown in Fig. 7A, the auxiliary flight folding unit ( In the process of moving toward 400), the scum can be removed.

Next, after the scum is removed, the folding piece 311-2a of the rotating part 311-2 provided on the hinge pin 311 of the auxiliary flight 310 is moved toward the bottom of the settling basin and the idle shaft 410 It contacts the folding inclined surface portion 421 of the folding disk 420 provided in (Fig. 7(b), Fig. 8(a)). Thereafter, as the folding piece 311-2a of the rotating part 311-2 gradually contacts and moves along the folding inclined surface 421 of the folding disk 420, FIGS. 8B and 8C , (d), (e), (f), the auxiliary flight 310 is gradually folded at the end of the flight body 301 (Fig. 7(c)).

Next, as the auxiliary flight 310 is moved toward the bottom of the settling basin in the folded state of the flight 300, the sludge on the bottom surface is scraped and moved (Fig. 7 (d) (e)), followed by the sludge bottom. The auxiliary flight 310 is unfolded to both ends of the flight body 301 of the flight 300 through the process described above by the weight of the auxiliary flight body 313 while being separated from the surface portion (Fig. 7 of (f)(g)).

Next, when the auxiliary flight 310 located at both ends of the flight body 301 is not in an unfolded state due to other causes such as foreign matter, the bracket 510 is used as a bolting (BT) by the support piece 520 ), the unlocking correction piece 311-2b of the rotating part 311-2 is further rotated by the inclined panel 530 in the process of passing through the inclined panel 530 fixed to the auxiliary flight 310 The state parallel to 301 can be maintained (Fig. 7(h)(i)).

In the above, the present invention has been described based on what is shown in the drawings, but this is only exemplary, and various substitutions, modifications, and changes are possible within the scope of the technical spirit of the present invention. It is not limited.

100: drive unit 110: drive motor
111: drive shaft 120: drive sprocket
130: drive chain 140: head shaft
150: collector sprocket 160: sprocket guide
170: driven sprocket 200: collector chain
300: flight 301: flight body
302: flight hinge 302-1: hinge hole
302-2: Folding, unfolding guide hole 302-2a: Unfolding hole
302-2b: Mode selection hole 302-2c: Folding hole
310: auxiliary flight 311: hinge pin
311-1: female thread part 311-2: rotating part
311-2a: Folding section 311-2b: Unfolding correction section
312: join rod 312-1: join female thread
313: auxiliary flight body 313-1: join rod insertion groove
313-2: screw through hole 314: fixing screw
400: auxiliary flight folding part 410: idle shaft
420: folding disk 421: folding slope

Claims (10)

A drive sprocket 120 coupled to the drive shaft 111 of the drive motor 110 on one side of the settling basin SB; and a drive chain 130 provided so that the upper portion of the drive sprocket 120 is wound; And a drive unit 100 including a collector sprocket 150 provided on a head shaft 140, which is provided so that the lower portion of the drive chain 130 is wound, and has both sides rotatably supported.
A collector chain 200 connected to the driving unit 100 to enable infinite driving;
It is provided so as to have a certain interval in the collector chain 200, the cross section is "

"Flight body 301 having a predetermined length in shape; and a folding that is fixed to both ends of the flight body 301 and penetrates toward the outer periphery of the inner periphery having a hollow hinge hole (302-1) , A flight hinge 302 provided to have an unfolding guide hole 302-2 is provided, and is inserted into the hinge hole 302-1 so as to be reciprocally moved up and down, and is predetermined at the outer periphery located at the top. A hinge pin 311 having a female threaded portion 311-1 provided to have a depth and having a rotating portion 311-2 at the lower end; and folding and unfolding guide holes 302- of the flight body 301 2) a join rod 312 having a tightening female screw portion 312-1 spaced apart from the outer periphery of the hinge pin 311 by being screwed to the female screw portion 311-1 of the hinge pin 311; And The auxiliary flight 310 including the auxiliary flight body 313 coupled to the joining rod 312 rotates at both side ends to enable folding and unfolding; And
The other side of the driving unit 100 is provided with a rotatable idle shaft 410 at a portion in which the driving direction is changed, and a folding disk 420 is provided on the idle shaft 410, and the folding disk 420 is an outer circumference Sludge collecting device for sedimentation basin, characterized in that it includes an auxiliary flight folding unit 400 having a folding inclined surface portion 421 extending from the inside to the outside. delete The method of claim 1,
The collector sprocket 150 is divided up and down or left and right, and the head shaft 140 is inserted into the divided interior, and the sludge collecting device for sedimentation is coupled to be abutted with a bolting (BT).
The method of claim 1,
The collector sprocket 150, a sprocket guide 160 having a disk shape is coupled to the outer surface, the sprocket guide 160 is a sludge collecting device for sedimentation, characterized in that it is provided larger than the diameter of the collector sprocket 150 .

delete The method of claim 1,
The folding and unfolding guide hole 302-2 is an unfolding hole 302-2a having a shape cut to have a predetermined length from the lower end of the flight body 301 toward the lower end; and
A mode selection hole (302-2b) having a shape inclinedly cut from the top of the unfolding hole (302-2a) toward the front of the flight body (310); And
A sludge collecting device for sedimentation, characterized in that it comprises a folding hole (302-2c) cut to have a predetermined length from the lower portion of the mode selection hole (302-2b) toward the upper portion of the flight body (301).
The method of claim 6,
The unfolding hole (302-2a) and the folding hole (302-2c) are arranged to have a right angle shape.
The method of claim 1,
The pivoting part 311-2 is provided in a direction perpendicular to the lower end of the hinge pin 311, and a folding piece 311-2a provided in parallel with the joining rod 312; And
An unfolding correction piece (311-2b) provided in a direction perpendicular to the folding piece (311-2a) is included.
The method of claim 1,
The auxiliary flight body 313 includes a join rod insertion groove (313-1) provided to fit the join rod (312);
A screw through hole provided in the auxiliary flight body 313 so as to be at right angles to the joining rod insertion groove 312-1, and having a center aligned with the female screw portion 312-1 of the joining rod 312 ( 313-2); And
Sludge collecting device for sedimentation basin, characterized in that it includes a fixing screw (314) screwed to the female screw portion (312-1) tightened through the screw through hole (313-2) of the tightened rod (312).
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