JPH049561B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The industrial field of application of the present invention relates to a device and a method for transporting accumulated sludge in a settling tank.

First, the environment leading to the discharge of this type of accumulated sludge and the conventional method for discharge will be explained.

As shown in Figure 1, a set of sedimentation tanks P, which are generally known in water treatment plants, divide the above water surface into four parts, and the surrounding area, boundary area, and bottom of each area are covered with concrete. It is formed by the state divided by the setting. Vertical rails R are laid in parallel on both sides of the sedimentation tank P in the longitudinal direction and on the middle wall thereof, and outside the tank at one end of the sedimentation tank P in the longitudinal direction, there are A transverse rail S is laid orthogonal to the longitudinal rail R, and a traverser T is placed on the transverse rail S so as to be able to freely move laterally.
This traverser T has a mobile air blowing device (not shown) and divides the sedimentation tank P into divided tanks P ₁ , P ₂ , P ₃ ,
When supplying air into P ₄ , use the divided tank on one side.
After the air has been supplied into P ₁ and P ₂ , this air blowing device is used to move to the other divided tanks P ₃ and P ₄ .

Even if air is supplied to the sedimentation tank P as described above, suspended solids will accumulate on the bottom of each tank over time, so consideration is given to removing the suspended solids when the amount has accumulated to about 100 mm from the bottom of the tank. . The method for discharging this accumulated sludge is to take a break from each division tank every month, drain the water in the tank, and dry it in the sun. If a power shovel or the like is used at this time, the tank walls and tank bottom will be damaged, so conventionally, the accumulated sludge in the tank has been manually scraped up and discharged. Therefore, moving workers inside the tank when discharging accumulated sludge is undesirable from a sanitary point of view and reduces the quality of the discharge, and it also increases costs because the work efficiency is not improved due to manual labor. There were various problems.

This invention was made to solve the above-mentioned problems, and its purpose is to use rails and traversers installed on and near the walls of the sedimentation tank to The sludge accumulated on the bottom of the tank can be smoothly and easily scooped out without damaging the walls or the bottom of the tank, and it can be discharged out of the tank reliably.It is also hygienic due to mechanical operation and has good workability. An object of the present invention is to provide a device and a method for transporting accumulated sludge in a settling tank, which can improve the quality of discharge and improve efficiency.

Hereinafter, the present invention will be explained based on the accompanying drawings.

First, the configuration of each main part of the ejection device, which is a means for solving the problem, will be explained.

Reference numeral 1 denotes a gate-shaped traveling frame for traveling on longitudinal rails R laid in the longitudinal direction of the sedimentation tank P. The gate-shaped traveling frame 1 described above is formed as follows. That is, as shown in FIGS. 2 to 4, this gate-shaped traveling frame 1 is connected to a sedimentation tank P.
The span of the longitudinal rail R on each side (traverser T
spanning a span on each side corresponding to the length of
It consists of a saddle 12 extending directly below each side from the left and right ends, and two girders 11 connecting the two saddles 12. The wheels 13 attached to the lower ends of both saddles 12 are fitted onto the longitudinal rails R at each position, and the gate-shaped traveling frame 1 is configured to be able to travel by rolling thereof.
Square steel rails 14 are welded to the upper and lower surfaces of both girders 11 in parallel in the longitudinal direction, and a transverse frame body 2 (to be described later)
It is formed so that it can be moved laterally. In this embodiment, a stopper 14' is attached to the end position of the rail 14 to prevent the traversing frame 2 from slipping off. In addition, the left and right saddles 12 mentioned above have the same shape 2.
Motors 18 for traveling the gate-shaped traveling frame of the body are individually installed. Note that a belt conveyor 9, which will be described later, is placed on one side of the girder 11 in parallel with the longitudinal direction.

Reference numeral 2 denotes a transverse frame body that moves laterally on the rails 14 of the gate-shaped traveling frame 1. This rampant frame body 2
As shown in FIGS. 2 to 7, the traversing wheels 21 attached to the four corners of the square frame are fitted in the upper and lower rails 14 of the gate-shaped traveling frame 1 in a clamping manner, so that lateral movement is achieved. It is configured so that it is possible.
The lateral movement of the traversing frame 2 is carried out by a traversing sprocket wheel 16A and a driven sprocket wheel 16 driven by a frame traversing motor 15 installed at the top of one side of the gate-shaped traveling frame 1.
This is carried out by a frame body traverse chain 17 which is stretched between the frames B and whose both ends are locked to the opposing frame portions of the traverse frame body 2. The above-mentioned transverse frame body 2
As clearly shown in FIG. 7, it has a substantially rectangular space in the center of the plane through which a bucket elevator 3 (to be described later) can be inserted. Further, at the four upper and lower corners of the space, overturn prevention rollers 22 are arranged to support the four-sided corners of the bucket elevator casing 31, which forms the outer shell of the bucket elevator 3. As shown in FIGS. 5 to 7, two elevating cylinders 23 of the same shape are erected in parallel on both sides of the central band in the longitudinal direction of the transverse frame 2. Ram 24
A sprocket 25 is attached to the top of each. Then, the two-line chain 26, which locks one end to both lifting cylinders 23 and simultaneously moves the bucket elevator 3 and the sludge scooper 5 up and down, is fitted into the sprocket 25 on each side, and then
The lower end portion hanging downward is fixed to the side surface of the casing 31 of the bucket elevator 3. When both of the elevating cylinders 23 described above are extended simultaneously, the bucket elevator 3 (to be described later) is configured to rise twice as much as the elevating cylinder 23 extends.

Reference numeral 3 denotes a bucket elevator vertically penetrating the central space zone of the transverse frame 2 and arranged to be able to rise and fall. The bucket elevator 3 described above is formed as follows. That is, as shown in FIGS. 3 to 10, in this bucket elevator 3, a bucket elevator casing 31, which is a hollow body with a rectangular cross section, vertically penetrates the central space zone of the transverse frame 2. Each end of a chain 26 hanging down from two lifting cylinders 23 erected on both sides of the center of the transverse frame 2 is connected to both sides of the lower part of the casing 31, and thereby the bucket elevator 3 is configured so that it can be moved up and down within a specified range by operating the cylinder 23. A drive sprocket 33A is rotatably housed in the upper part of the casing 31, and a sprocket wheel 33B is rotatably housed in the lower part, and a series of bucket elevator chains 34 are provided between the sprockets 33A and 33B. It is being passed around. A large number of individual buckets 35 are attached to this chain 34 at intervals. A chain from a bucket elevator motor 38 installed outside this position is wound around the upper drive sprocket 33A, and the individual bucket carts 35 are configured to circulate in one direction by driving the chain. ing. A boot 32 for scooping up the sludge W by the individual bucket 35 is formed at the lower end of the casing 31 according to this embodiment. At one end of this boot 32, sludge W is scooped up and thrown in by a scoop 6 of a sludge scooping machine 5, which will be described later.
A chute 36 is provided for guiding the inside. Furthermore, a chute 37 is attached to the upper part of the casing 31, through which the sludge W discharged from the individual buckets 35 is guided down onto a belt conveyor 9, which will be described later. Further, at the top of the casing 31, there is disposed a bucket scraper device 10 which is interlocked with the bucket elevator motor 38 described above. The above-mentioned scraping device 10 is designed to remove the inside of the individual bucket 35 immediately before the bucket 35 moves downward, assuming that the sludge W in the individual bucket 35 that has reached this position does not fall under its own weight due to its own adhesiveness. It is configured so that the sludge W can be scraped out.

The eighth guide chute 36 has an eighth
As shown in FIGS. 10 to 10, there is a sludge receiving groove 4 which is donut-shaped in plan and has a long cylindrical wall on the inner ring and a short groove wall with a bottom concentrically arranged on the outer ring. It is mounted in a mounted manner. A scraper 45 is provided in a short groove with a bottom disposed outside the sludge receiving groove 4 as described above, and is rotated within this groove by the drive of a scraper motor 42. Further, an annular roller chain 41 is attached to the inner wall of the long cylinder of the sludge receiving groove 4, and a sprocket wheel 43 connected to a scraper motor 42 installed inside and a chain 44 is engaged with the roller chain 41. It's on. Note that a roller 46 is located inside the long cylinder wall of the sludge receiving groove 4.
are arranged at intervals and support the lower end of the scraper 45 from the inside.

Reference numeral 5 denotes a sludge scooping machine 5 disposed directly below the bucket elevator 3 as described above so as to be capable of integral lifting and lowering movements and separate horizontal turning movements. The sludge scooping machine 5 described above is formed as follows.
That is, as shown in FIG. 3, FIG. 4, FIG. 8, FIG. 11, and FIG. 12, this sludge scooping machine 5,
A scoop 6, which will be described later, is swingably disposed on the distal end side of the outer frame 51, which is made up of an internal hollow body whose distal end side is open and whose rear end side is closed. The outer shell is constructed by inserting the frame 52 in a slidable manner. In this case, guides 53 are inserted through multiple locations at the bottom sliding contact positions of the outer frame 51 and the inner frame 52,
This allows the inner frame 52 to move forward and backward in a straight line. A cylindrical revolving body 54 in which an annular sprocket wheel 50 is fitted is erected on the upper surface of the front end side of the outer frame 51, which is approximately in the middle of the overall length. As shown in the figure, it is connected to a scooping machine rotation motor 58 installed outside the boot 32 of the bucket elevator 3 via a chain. Note that the tip of the arm extending rearward from one end of the revolving body 54 is supported between springs 100 on a support shaft, and when scooping up sludge W by the scoop 6, which will be described later, is carried out to the side of the scoop 6. When resistance is applied, the supporting force of the spring 100 acts as a buffer, and a follow-up bullet countermeasure is taken to smooth the plane continuous rotation movement of the sludge scooper 5.
A scoop drive motor 55 is installed on the rear end of the outer frame 51 described above. A crankshaft 57 is attached to the output shaft of the scoop drive motor 55.
is fitted so that it can move circularly, and this crankshaft 57
A connecting rod 56 whose tip end is anchored to a pin 85 of the inner frame 52 as shown in FIG. 16 is connected to the connecting rod 56. As described above, when the scoop drive motor 55 is driven, the inner frame 52 is configured to move forward or backward through the connecting rod 56 due to the circular motion of the crankshaft 57.

A rack 65 is mounted in the longitudinal direction at the center of the inner bottom end of the outer frame 51 as described above. A pinion 66, which is fitted onto a shaft 81 within the inner frame 52, is meshed with the rack 65. (See Fig. 14) Coaxial 8 adjacent to the pinion 66
A cam clutch 8 that transmits rotation in one direction is shaft-fitted into the shaft. A sprocket wheel 82 is fitted concentrically into the cam clutch 8.
When the inner frame 52 moves forward (when moving leftward)
The rotation of the pinion 66 is configured so as not to be transmitted to the sprocket wheel 82. Therefore, the forward movement of the inner frame 52 is configured so that it directly becomes the forward movement of the scoop 6, and the sludge W can be scooped out.

Next, when the inner frame 52 moves backward (moves to the right)
By the operation of the cam clutch 8 described above, the rotation of the pinion 66 is transmitted to the sprocket wheel 82, and the sprocket wheel 72, which is connected to the sprocket wheel 82 through the drive chain 107, is attached to the front end of the inner frame 52. The clutch 7 is fitted onto the shaft 71 shown in FIG.
They are assembled so that they rotate clockwise in the same manner as they are fitted concentrically. In this case, since the clutch 7 is always in contact, one sprocket wheel 73A on the same shaft 71 also rotates clockwise, and the base shaft of the scoop 6, which is connected to this sprocket wheel 73A via a drive chain 109, is rotated clockwise. The sprocket wheel 69 fitted on the operating shaft 62 also rotates clockwise, causing the scoop 6 whose base end is fitted onto the operating shaft 62 to rotate to the right around the shaft 62. As a result of the rotational lifting operation, the sludge W on the scoop 6 is thrown into the sludge receiving groove 4 at the bottom of the bucket elevator 3.

A stand stopper 59 is provided at the top end of the outer frame 51 to restrict the lifting movement of the scoop 6 in an upright state. In this case, even after the arm 61 of the scoop 6 contacts the stand stopper 59 in an upright state, when the inner frame 52 still moves backward by about 100 mm, at this point, the arm 61 of the scoop 6 is installed protruding from the left side of the outer frame 51. The lower end of the lever 76, which is swingably disposed outside the left side of the inner frame 52, comes into contact with the roller stopper 64 (see FIG. 11a) to open the central clutch 7. As shown in FIG. 13, the lever 76 is arranged so that it can be lifted up and down alternately by means of a pin 77. Therefore, when the upper end of the lever 76 is pulled outward due to contact with the roller stopper 64 as described above, this upper end presses the clutch lever 75 by the pin 74 holding the fulcrum against the supporting force of the push spring 79. The operating lever 78 is pulled outwards, thereby opening the clutch 7. Since the sprocket wheel 73A is also freed by the above-mentioned opening of the clutch 7, the scoop 6 is configured to descend counterclockwise due to its own weight.

On the front end side of the inner frame 52 described above, there is a 12th
Scotop drop control cylinder 67 as shown in the figure.
are arranged parallel to the longitudinal direction,
A control guide 106 is attached to the tip of the piston rod 68. This control guide 106
A coaxial sprocket wheel 73B adjacent to the clutch 7 described above and a shaft 83 shown in FIG.
The control chain 105 is connected to a control chain 105 which is wound in two stages between the sprocket wheel 103 and the sprocket wheel 103 which is fitted on the shaft. Therefore, when the scoop 6 is lowered (the operating shaft 62 rotates counterclockwise), the shaft 71 rotates counterclockwise, and the piston rod 68 is pushed into the scoop drop control cylinder 67, thereby reducing the resistance of the internal hydraulic pressure. As a result, the descending speed of the scoop 6 is smoothly controlled, and the scoop 6, which is disposed at the tip of the sludge scooper 5 which rotates while being driven by the motor 58, is continuously driven by the motor 5.
5, the sludge W on the bottom X of the settling tank P can be scooped up again into a flat donut shape.

When repairing the scoop 6, for example, when not working on sludge scooping, the scoop 6 is suspended above the ground, so the motor 55 is
When activated, the roller stopper 64 and lever 76 do not come into contact with each other even when the scoop is in an upright state, so the scoop may further rise vertically and bend, colliding with the sludge receiving groove 4 and causing damage. In response to this, the following auxiliary safety devices have been installed. 11b, 12 and 13.
As shown in the figure, a protrusion 101 is provided on a part of the outer periphery of the base end of the arm 61, and the protrusion 10
A receiving portion 102 is swingably disposed by being supported by a shaft portion at a position where the receiving portion 102 abuts when the portion 1 shifts to an upright position. Further, on the right side of the clutch lever 75, a convex rod 87 supported by a guide 86 and supported by a push spring 89 is held in a standby position away from the clutch lever 75 by a stopper 88 from above. It is located in When the convex part 101 presses the receiving part 102 as described above, the stopper 88 moves up in conjunction with the receiving part 102, and the convex rod 87 is moved to the right standby position by the supporting force of the push spring 89. By moving horizontally to the left from the position, the clutch lever 75 is pressed and the clutch 7 is released. As a result, the driving force of the motor 55 is not transmitted to the scoop 6 and it maintains its stopped posture in its upright position, but since the inner frame 52 continues to move backward with the driving force of the motor 55, the arm 61 comes into contact with the stand stopper 59, and at this point the scoop 6 is configured so that it can be easily and reliably lowered from the upright position to the original position by its own weight.

9 is a belt conveyor installed horizontally along one girder 11 of the gate-shaped traveling frame 1.
The belt conveyor 9 described above is formed as follows. That is, as shown in FIGS. 17 to 21, this belt conveyor 9 includes motor pulleys 95A and 95B installed at both ends of a conveyor frame 91 directly below the discharge end of the top chute 37 of the bucket elevator 3. A belt 90 that can run in both forward and reverse directions is arranged so that the sludge W can be discharged to the outside by this belt 90. Belt 9 above
0, its conveyor frame 91 is supported by a large number of receiving rollers 92 scattered on the girders 11 of the portal-shaped traveling frame 1 described above. A lateral movement motor 94 is installed on one side of the conveyor frame 91 approximately in the middle. Further, in the middle of the frame, a lateral movement chain 99 is connected to the lateral movement motor 94 with one end locked to the joint 91' of the conveyor frame 91 and the other end locked to the other side joint 91'' of the conveyor frame 91. A traverse movement device 93 is disposed that is wound around a sprocket wheel 97 disposed concentrically in the middle of the frame and sprocket wheels 98A and 98B disposed on both sides thereof, and drives the motor 94 in the forward and reverse directions. At times, the transverse movement device 93 is configured to allow the left and right ends of the belt conveyor 9 to protrude out of the sedimentation tank P on that side at will, so that the accumulated sludge is transported in one set as a whole. The composition is in device K.

The method for discharging accumulated sludge according to the present invention using the apparatus K for discharging accumulated sludge having the above-mentioned configuration will be explained along with some of its functions.

(1) First, before discharging the accumulated sludge, for example, the first
As shown in the figure, when discharging accumulated sludge in the preset order of each division tank P ₁ , P ₂ , P ₃ , P ₄ , the water should be drained approximately one month beforehand, and the sludge should be drained. After the W has been dried in the sun to the optimum condition for scooping, place it on the first divided tank _P2 .
The accumulated sludge transport device K carried in from the outside is reached by mounting and fitting the wheels 13 on the longitudinal rails R laid on both sides of the tank P ₁ and driving the gate-shaped traveling frame traveling motor 18. let

(2) When the accumulated sludge discharge device K reaches the corresponding division tank P ₁ where sludge is to be discharged, the lifting cylinder 2
By operation 3, the bucket elevator 3 and the sludge scooping machine 5 disposed directly below it are lowered to the position where the tip of the shovel 6 in the depressed shape comes into contact with the bottom X of the tank below the sludge W. . When the scoop drive motor 55 of the sludge scooper 5 is driven when it has descended to the optimum position, the inner frame 52 moves forward via the connecting rod 56 due to the rotation of the crankshaft 57. However, during this forward movement, the rotation of the pinion 66 is not transmitted to the sprocket wheel 82, so the scoop 6 disposed on the front end side of the inner frame 52 moves toward the tank bottom X without being lifted.
Since it moves forward while in sliding contact with the scoop, the sludge W deposited in the position just in front of it can be scooped up smoothly and easily into the scoop.

(3) After the sludge W is scooped out by the scoop 6 as described above, the connecting rod 56 moves backward in conjunction with the sludge W scooping operation, so the pinion 6 is moved by the operation of the cam clutch 8.
6 rotation is transmitted to sprocket wheel 82. Therefore, the sprocket wheel 72 connected to the sprocket wheel 82 via the drive chain 107 rotates clockwise, and the sprocket wheel 73 disposed on the same axis rotates clockwise.
Since the sprocket wheel A also rotates in the same direction, the sprocket wheel 69 connected to the sprocket wheel 73A through the drive chain 109 rotates, and the scoop 6 rotates clockwise around the operating shaft 62. Lifting operations can be performed.

(4) The sludge W scooped up in the above manner,
As shown in FIG. 8 for each scooping operation, by throwing the sludge into the sludge receiving groove 4, the scraper 45 rotates cooperatively within the receiving groove 4, and the sludge W is pushed to the bottom side of the boot 32. In order to scrape off this sludge W, this sludge W is scooped up by an individual bucket 35 which is rotating in one direction with the drive of a motor 38 inside the bucket elevator 3, and then is moved from the top chute 37 to a position directly below the top chute 37 in a coordinated manner. It can be discharged onto the belt conveyor 9 which is running. Even if the sludge W in the individual buckets 35 is sticky and cannot fall naturally, when each individual bucket 35 reaches the top, the sludge W inside is forcibly removed by the bucket scraper 10 at this position. It will be scraped out. Therefore, the sludge W can be discharged smoothly and reliably.

(5) Furthermore, since the accumulated sludge discharge device K is located above the separation tank P ₁ of the sedimentation tank P at this point, the sludge W discharged onto the belt conveyor 9 is driven by the lateral movement motor 94. By causing the end portion of the conveyor 9 on this side to protrude to the outside of the lateral side of the sorting tank _P1 , the sludge W can be easily discharged to the outside of this side.

(6) As mentioned above, the sludge W flows into the sludge receiving groove 4.
The scoop 6 into which the scoop 6 has been thrown is indirectly connected to the scoop drive motor 55 that operates continuously, so when the inner frame 52 moves back about 100 mm further, it protrudes to one outer side of the inner frame 52. A lever 76 is attached to the roller stopper 6 protruding from the outer frame 51 on this side.
4, the clutch 7 becomes open. Therefore, since the sprocket wheel 73A also becomes free, the scoop 6 can be safely and accurately lowered by its own weight toward its original position while the falling speed is controlled by the scoop drop control cylinder 67.

(7) Furthermore, by driving the scooping machine turning motor 58 installed at one end of the outer periphery of the boot 32 to rotate the sludge scooping machine 5 in a predetermined direction within a specified angle range, the sludge scooping machine 5
is a combination of both movements, while horizontally turning in the relevant direction around the rotating body 54 by the drive of the motor 58, and simultaneously with the forward movement of the inner frame 52 by the continuous drive of the scoop drive motor 55. The sludge W on the tank bottom X can be scooped out in a donut shape. In addition, due to the above, sludge W in area 1
After discharging it in a donut shape, the gate-shaped traveling frame 1 is moved vertically by the drive of the gate-shaped traveling frame traveling motor 18, and the frame body traverse motor 15 is driven.
The sectional tank P ₁ is moved horizontally by the drive of
The sludge W inside can be discharged smoothly, easily, and quickly under the mechanical power of coordinated operations.

By sequentially repeating the above method, the sedimentation tank P
When the discharge of the sludge W in the divided tank P ₁ corresponding to the initial position is completed, the accumulated sludge discharge device K is moved to the next divided tank P 1 adjacent to the divided tank P ₁ on this side by the drive of the gate type traveling frame traveling motor 18. After moving to the divided tank P ₂ by self-propulsion, the sludge W in this tank P ₂ can be discharged again by the same method as described above. Furthermore, when the discharge of the sludge W from the tanks P ₁ and P ₂ on this side is completed, the accumulated sludge discharge device K is immediately moved from the sedimentation tank P onto the traverser T waiting outside in the longitudinal direction on this side. After transferring to
This traverser T moves the unloading device K to the next compartment tanks P ₃ and P 4 adjacent to the compartment tank P ₂ , and the device K is moved again by self-propulsion to the compartment tanks P 3 and P ₄ on this side.
By the method of transferring the sludge onto _P3 , it is possible to uniformly discharge the sludge W to all the divided tanks _P1 ... _P4 in sequence. In addition, the order of each division tank in the sludge discharge operation is not limited to the above-mentioned order, and can be set freely.

The effects of the present invention using the above-mentioned ejection device and ejection method will be explained.

As explained above, the accumulated sludge discharge device of the present invention includes: 1. A gate-shaped traveling frame that moves in the longitudinal direction across the tank; 2. A transverse frame that travels along the girder of the gate-shaped traveling frame; 3. A bucket elevator suspended from the above-mentioned transverse frame so as to be able to rise and fall; 4. A sludge scooper attached to the bottom of the above-mentioned bucket elevator; 5. A belt conveyor arranged along the girder 11 of the gate-shaped traveling frame. After assembling the main parts into a single body, the method for discharging the accumulated sludge is as follows: This is achieved by mounting and fitting the wheels onto the rails and driving the gate-shaped traveling frame traveling motor.

(2) After lowering the bucket elevator and the sludge scooper located directly below it by operating the lifting cylinder to the position where the sludge scooper touches the bottom of the tank, the scoop 6 is lowered.
The tank is moved forward while slidingly contacting the tank bottom via the inner frame without being lifted.

(3) The scoop that has scooped up the sludge is lifted by rotating clockwise around the operating shaft by operating the cam clutch.

(4) After each scooping operation, the scooped sludge is thrown into a sludge ditch and discharged onto a belt conveyor by a bucket elevator.

(5) The sludge on the belt conveyor is discharged to the outside of this side by driving the lateral movement motor, with the end of the conveyor on this side protruding to the outside of the lateral side of the sorting tank.

(6) The scoop that has thrown the sludge into the sludge receiving groove is controlled by its own weight through the backward movement of the inner frame and the contact between the lever protruding on the outside and the roller stopper protruding on this side. Lower it to its original position.

(7) While rotating the sludge scooper, at the same time the inner frame moves forward to scoop out the sludge at the bottom of the tank in a donut shape. By repeating this method in sequence, the sludge accumulated on the bottom of each tank can be smoothly and easily scooped out and reliably discharged to the outside of the settling tank without damaging the tank walls or bottom of each compartment. Moreover, since it is hygienic and has good workability due to mechanical operation, it has the effect of improving the quality of discharge and improving efficiency.

In addition, the present invention, especially in a sand filtration type settling tank, allows only the accumulated sludge cake to be scooped out with a scoop that is pushed out horizontally at the boundary between the accumulated sludge cake and the filter sand, thereby minimizing the wear and tear on the filter sand. Moreover, it is possible to leave a horizontal and smooth filter sand surface.

[Brief explanation of drawings]

FIG. 1 is a plan view of a settling tank from which accumulated sludge is discharged by the conveyance device of the present invention, FIG. 2 is a plan view of the accumulated sludge conveyance device according to the present invention, FIG. 3 is a front view thereof, and FIG. The same side view, FIG. 5 is a front view of the transverse frame body in the same device, FIG. 6 is the same side view, and FIG.
Figure 8 is a sectional view of the boot and sludge receiving groove in the same device, Figure 9 is a side view of the same, and Figure 10 is a plan view of the same.
The figure is a plan view of the same part, Figure 11a is a plan view of the sludge scooping machine in the same equipment, Figure 11b is a detailed view of the z section in Figure 11a, and Figure 12 is a longitudinal section of the same sludge scooping machine. 13 is a cross-sectional view of the clutch position taken along line A-A in FIG. 12, and FIG.
- Cross-sectional view of the cam clutch position on line B, 1st
5 is a cross-sectional view taken along the line C-C, FIG. 16 is a cross-sectional view taken along the line D-D, FIG. 17 is a front view of the main part of the belt conveyor in the same device, and FIG. 18 is a cross-sectional view taken along the line E-- 19 is a sectional view of the belt conveyor taken along line E; FIG. 19 is a sectional view taken along line FF;
0 is a sectional view taken along the line GG, and FIG. 21 is a partially sectional view taken along the line HH. 1...Gate type traveling frame, 2...Transverse frame body, 3
...Bucket elevator, 4...Sludge receiving groove, 5
...Sludge scooping machine, 6...Scoop, 7...Clutch, 8...Cam clutch, 9...Belt conveyor, 10...Bucket scraping device, 11...
Digit, 51...outer frame, 52...inner frame,
59...Stand stopper, 64...Roller stopper, 65...Rack, 66...Pinion, 76
... Lever, K ... Accumulated sludge transport device, P ... Sedimentation tank.

Claims (1)

[Claims] 1. A gate-type traveling frame that extends vertically over the sand filtration type sedimentation tank, a frame body that runs horizontally along the girder of the gate-type travel frame, and a frame that is suspended from the frame body so that it can be raised and lowered vertically. In the accumulated sludge discharge device, which comprises a bucket elevator, a sludge scooper attached to the lower end of the bucket elevator, and a belt conveyor disposed along the girder of the gate-shaped traveling frame, the sludge The scooping machine is installed horizontally at the bottom of the bucket elevator.
Consists of an outer frame that rotates 360 degrees, an inner frame that is installed to move in and out of the outer frame back and forth, and a scoop that is attached to the tip of the inner frame and rotates in the vertical direction. A device for discharging accumulated sludge in a sand filtration type settling tank, characterized by: