JPH07171306A - Method and apparatus for recovering sand or sludge - Google Patents

Abstract

PURPOSE:To efficiently recover sand or sludge by simple constitution and easy operation. CONSTITUTION:The suction port 21a of a suction device 21 is opened to the bottom part of water treatment equipment 1 and, when sand or sludge is accumulated on the bottom 1b, the leading end part 16A of a plate-shaped cover member 16 is moved to the area above the suction port and the sand or sludge Sa accumulated on the bottom is covered with the leading end part 16A and the suction force of the suction device 20 is allowed to act on the space between the leading end part 16A and the bottom 1b to suck and recover the sand or sludge present between the leading end part of the cover member and the bottom. Further, the cover member is successively moved to the upper side of the sand or sludge in front of the suction port to successively suck and recover the sand or sludge accumulated on the bottom. By this constitution, sand or sludge can be recovered without being mixed with water on the upper side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for recovering sand, sludge, etc., and more particularly, a method and apparatus for recovering sand, sludge, etc. accumulated at the bottom of water treatment facilities such as water channels, sand basins, and sedimentation basins. Regarding the device.

[0002]

2. Description of the Related Art In a conventional sewage treatment plant, sewage collected through sewerage is guided to a sedimentation basin by a pump before being sent to a sedimentation basin, etc., and sand in the sewage is collected and removed at the bottom of the sedimentation basin. However, sand is prevented from entering the pump, the pump is protected and the treatment in the sedimentation tank is effectively performed, and the sludge that has precipitated is collected in the sedimentation tank. (i) In order to collect the sand accumulated at the bottom of the sand basin, for example, a bucket conveyor consisting of an endless chain with a large number of buckets installed at intervals is installed in the sand basin, and each bucket can be moved by moving the endless chain. The sand accumulated at the bottom is scooped and the sand is discharged out of the settling basin. (ii) In order to collect the sludge accumulated at the bottom of the sedimentation basin, for example, an endless chain equipped with a large number of scraping plates at intervals is installed in the sedimentation basin, and each scraping plate is moved by moving the endless chain. The sludge that has accumulated at the bottom is scraped, and the scraped sludge is sucked and discharged outside the settling basin.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the above-mentioned (i) device for collecting sand or the like using a bucket conveyor, it is necessary to mount a large number of buckets on the endless chain, and the structure of the endless chain with buckets becomes complicated, and A driving device for driving an endless chain or the like also becomes large-scaled, and there is a drawback that equipment cost, operation cost, etc. required for collecting sand and the like in a sand basin and the like increase. Further, since the sand accumulated at the bottom is scooped by the bucket attached to the endless chain, water and the sand accumulated at the bottom are agitated, and the sand cannot be efficiently collected.
In the device for collecting sludge using the endless chain with the scraping plate described in (ii) above, it is necessary to attach many scraping plates to the endless chain, which complicates the structure of the endless chain with the scraping plate, and There is also a drawback in that a driving device for driving the etc. becomes large in size. Further, there is a drawback that the sludge and the like accumulated at the bottom are attracted by the scraping plate and the sludge and the like accumulated at the bottom are agitated with each other, so that the sludge and the like cannot be efficiently collected. The problem to be solved by the present invention is to provide a method and a device for collecting sediment, sludge and the like which do not have the above-mentioned drawbacks of the prior art. In other words, the structure is simple, the operation is easy, and the recovery is possible. An object of the present invention is to provide a method and device for efficiently collecting sand, sludge and the like.

[0004]

The present invention adopts the following configuration as a means for solving the above problems. The configuration of the present invention is a device for moving a plate-shaped shield in a method of sucking and collecting sand, sludge and the like accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, and a sedimentation basin from a suction port of a suction device. , The suction port of the suction device is opened at the bottom of the equipment, and when sand, sludge, etc. are accumulated at the bottom, the tip of the plate-shaped shield is moved above the suction port. The tip of the shield shields the upper side of the sand, sludge, etc. that accumulates at the bottom, and the suction force of the suction device acts between the tip and the bottom of the shield. Suction and collect sand, sludge, etc. between them, sequentially move the shield to the upper side of the sand, sludge, etc. in front of the suction port, and remove the sand, sludge, etc. accumulated at the bottom with this shield. Sand and sludge characterized by sequentially shielding and sucking and collecting sand and sludge between the shield and the bottom by the suction force of the suction device Lies in the way to recovery. Further, the structure of the present invention is a device for sucking and collecting sand, sludge, etc. accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, a sedimentation basin, etc. from the suction port of the suction device, with the suction port facing sideways. The device is provided, and the plate and the moving device are configured so that the shielding member and the moving device thereof can be configured to shield a desired portion on the upper side of the bottom where the sand, sludge and the like are accumulated. It is in the device for collecting.

The above-mentioned plate-shaped shield is constructed, for example, by attaching a water-impermeable membrane to a blind-shaped body formed by connecting a large number of rod-shaped bodies. Any structure may be used as long as it can shield a desired portion and can withstand water pressure during suction. The plate-shaped shield may be guided by guides provided along side walls on both sides of the water treatment facility, for example. In a preferred embodiment, a suction device is provided with the suction port facing laterally, guides are provided along side walls on both sides of the equipment, and a predetermined length portion of two endless chains arranged substantially in parallel. A large number of rod-shaped bodies are placed between the rod-shaped bodies, and both ends of each rod-shaped body are connected to an endless chain to form a blind-shaped body, and an impermeable plate-shaped body is attached to this blind-shaped body to form a plate-shaped shield. The guide unit guides each endless chain, and the drive unit of the endless chain is configured such that a desired portion above the bottom where sand, sludge and the like are accumulated is shielded by the shield. Further, in a preferred embodiment, a narrow flexible seal plate is arranged between the guide body and the portions from both edges of the impermeable plate-like body of the shield, and the seal is provided. The portion from the edge of the plate is attached to the guide or shield plate, and the seal plate is pressed against the shield plate or guide by water pressure to provide the impermeable plate and guide. Try to close the gap between you and your body. As the rod-shaped body, for example, a steel pipe is used, and as the impermeable plate-shaped body, a flexible thin film or plate-shaped body made of rubber, synthetic resin or the like is used.

[0006]

EXAMPLE 1 Example 1 is shown in FIG. 1 to FIG. 5, and a device for recovering sand or the like is provided in a sewage channel 1 just before being collected through a gutter of a road and sent to a sedimentation basin by a pump. This is an example in which 10 is provided and the sand and the like accumulated at the bottom thereof are collected. As shown in FIG. 1, a drive shaft 11 is arranged across the water channel 1 slightly upstream of the installation position of the pump, and the drive shaft 11 is rotatably supported by a bearing or the like. A motor or the like M ₁ is arranged on the upper side of one side wall of the water channel 1, and a pulley, a chain wheel or the like attached to the rotating shaft of the motor M ₁ or the like, and a pulley 11a or a chain wheel or the like attached to the drive shaft 11 are provided as a belt or a chain. And the like, and the drive shaft 11 can be rotated at a desired speed by starting the motor M _{1 and the} like. As shown in FIG. 4, a step portion 1a ₁ is formed in the lower part of the side wall 1a on both sides of the water channel 1, and a side wall 1a ₂ below the step portion 1a ₁ projects inside the water channel 1 and a bottom 1b. Sa, such as sand, is stored in the lower part of the water channel 1 surrounded by the side walls 1a ₂ .

The guide bodies 12 for guiding the chains 15A and 15B, which will be described later, are arranged along the side walls 1a on both sides of the water channel 1, as shown in FIGS. The guide 12 is
A vertical guide groove Gs ₁ extending in a substantially vertical direction and the vertical guide groove G
arc-shaped guide groove Gs ₂ connected to s ₁ and the arc-shaped guide groove Gs
A lateral guide groove Gs ₃ extending in the horizontal direction substantially continuous to _2, the semi-circular guide groove Gs ₄ continuous to the lateral guiding grooves Gs _3, the lateral extending substantially in the horizontal direction continuous to the semi circular guide groove Gs ₄ Guide groove Gs ₅
When, an arcuate guide groove Gs ₆ communicating with lateral guide grooves Gs _5, a vertical guide groove Gs ₇ extending in the vertical direction substantially continuous with the circular arc-shaped guide groove Gs _6, arcuate leading to said longitudinal guide grooves Gs ₇ Guide groove G
s ₈ and. Each of the guide grooves Gs _{1 to} Gs ₈ is U
The ridges CMa, which are made of steel CM having a section, are connected to each other and are continuous with the inner facing surfaces of the U shape.
Are formed. In addition, if necessary, the lateral guide groove Gs
₅ and the vertical guide groove Gs ₇ may be omitted. Driven shaft 13
It is arranged across the upper side of the water channel 1 which is separated from the drive shaft 11 on the upstream side, and is rotatably supported by a bearing or the like. A chain wheel C is attached to each of the drive shafts 11 above the step portions 1a ₁ of both side walls 1a.
The w ₁ is fixed and the rotary shaft 1 above the stepped portion 1 a _{1 on} both side walls 1 a
The chain wheel Cw ₂ is fixed to each of the portions 3. If necessary, a rotation shaft is provided at the center of the semicircle of the semicircular guide groove Gs ₅ , and a chain wheel is provided on this rotation shaft. May be.

The chains 15A and 15B are hung on the chain wheel Cw ₁ and the chain wheel Cw ₂ , and passed through the guide grooves Gs _{1 to} Gs ₈ of the guide bodies 12 on both sides, and are connected endlessly.
The chains 14A and 14B are, for example, as shown in FIG. 3, engaged with the connecting piece 14a in which circular holes 14a ₁ are provided at portions from both ends in the longitudinal direction of a rectangular steel plate, and the ridge CMa. a guide piece 14b with a circular hole 14b ₂ in the center has a flange 14b ₁ to an outer diameter of holes 1
4a ₁ and 14b ₂ and connecting pins 14c having a diameter slightly smaller than the inner diameters of 4a ₁ and 14b ₂ . Chain 1 shown by the chain line in Figure 2
4A, 14B, a pair of connecting pieces 14a are arranged on both sides of each guide piece 14b, and the holes 14a _{1 of the} connecting pieces 14a ₁
And a pair of guide pieces 14b are connected to each other through a connecting pin 14c through a hole 14b ₁ of the guide piece 14b.
The parts of the chains 14A, 14B shown in FIG. 2 in which a large number of small-diameter circles are drawn in a beaded shape are the left and right chains 14A,
14B is connected by a rod-shaped body 15. A connecting pin 1 is provided at the center of each end surface of the steel pipe 15a having a predetermined length.
The rod-shaped body 1 is welded to the end plate 15b from which the projection 5c is provided.
5, the outer diameter of the connecting pin 15c is made slightly smaller than the inner diameter of the hole 14a ₁ of the connecting piece 14a and the hole 14b ₂ of the guide piece 14b. The connection instead of pin 14c, the connecting pin 15c of the rod-like body 15, through the holes 14b ₁ of the holes 14a ₁ and the guide piece 14b of the connection piece 14a, the pair guide pieces 14
Chains 14A drawn in the shape of a bead by connecting b, 1
It constitutes part 4B. The outer diameter of the steel pipe 15a is such that a rod-shaped body composed of a large number of rod-shaped bodies 15 can be freely bent, and
The dimensions are such that the gap between the five becomes small. Chain 1
4A, 14B, within the guide grooves Gs ₁ ~Gs _8, chain 14A, each guide piece 14b of 14B flanges 14
b ₁ engages with the ridge CMa in each guide groove so that it can move smoothly along the guide groove.

A flexible thin plate-like body 17 made of rubber, plastic or the like is attached to the entire surface on the side to which water pressure is applied at the time of suction of the blind body 16 made up of a large number of rod-like bodies 15 between the chains 14A and 14B. . The upstream part of the U-shaped cross-section mold material CM that forms the vertical guide groove Gs ₁ and the arc-shaped guide groove Gs _2, and the U-shaped cross-section mold material CM that forms the lateral guide groove Gs _3.
The portion of the narrow sealing plate 18 from one edge is attached to the upper portion of the. The portion of the seal plate 18 from the other edge is made to abut on the portions of the plate-like body 17 attached to the blind 16 from both sides. The seal plate 18 is composed of a plate-like body that is slightly thicker than the flexible plate-like body 17 made of rubber, plastic, or the like. It should be noted that the portion from the other edge of the seal plate 18 is attached to the portions from both edges of the plate member 17, and the portion from one edge of the seal plate 18 is provided in the vertical guide groove Gs ₁ and the arc-shaped guide groove Gs _2. It is also possible to abut on the upstream side portion of the steel material CM constituting the above and the upper side portion of the steel material CM constituting the lateral guide groove Gs ₃ . As shown in FIGS. 1 and 2, the suction device 20 is disposed in the water channel on the downstream side of the vertical guide groove Gs ₁ of the guide body 12. The suction device 20 includes a suction body 21 having a suction port 21a for sand or the like, and a pump 2 having a motor M ₂ built-in in which a suction portion below the suction body 21 is connected to an upper end of the suction body 1.
3, a discharge pipe 24 and the like connected to the discharge portion of the pump 23. Then, the suction body 21 of the suction device 20 is installed above the bottom portion 1b ₁ which is one step lower than the water channel 1, with its suction port 21a facing upstream.

Next, a method of recovering sand etc. using the recovery device 10 of the first embodiment will be described. When a large amount of rain falls, a large amount of rainwater, etc. flows into the sewers through the road's gutters, mixes with rainwater, etc., and causes sand, gravel, etc. to flow, and the waterway slightly upstream of the installation position of the supply pump. At the bottom of 1, a large amount of sand, etc. S
a collects. When a certain amount of sand Sa or the like is accumulated at the bottom of the water channel 1, the flow of the sewage of the water channel 1 is blocked by an appropriate means. Then, the motor M ₁ or the like is activated to move the chains 14A and 14B on both sides along the guide grooves Gs _{1 to} Gs _8, and the tip portion 1 of the blind-shaped body 16 composed of a large number of rod-shaped bodies 15 is moved.
6A is moved to the upper side upstream of the suction port 21a of the suction device 20. Then, the motor M ₂ of the suction device 20 is started, the pump 22 is operated, and the suction force causes the suction device ₂ to suck the sand Sa or the like accumulated under the portion of the blind 16 below the tip.
1 and the pump 22 and transfers it through a discharge pipe 23 toward a predetermined reservoir of sand or the like. At the speed corresponding to the suction speed of Sa such as sand, the tip portion 16A of the blind-shaped body 16
Are sequentially moved to the upstream side, and the sand Sa or the like accumulated below the portion beyond the tip of the blind 16 is sucked into the suction body 21 and the pump 22 and transferred to the storage portion of the sand or the like through the discharge pipe 23. To do. A flexible plate-shaped body 17 is attached to the upper side surface of a blind-shaped body 16 composed of a large number of rod-shaped bodies 15, and a mold material CM that constitutes a vertical guide groove Gs ₁ and an arc-shaped guide groove Gs _2.
Of the mold material C that constitutes the upstream side portion and the lateral guide groove Gs _3.
The gap between the upper part of M and the both side edges of the plate-like body 17 is covered with the sealing plate 18, and the narrow flow between the bottom 1b surface of the water channel 1 and the tip lower surface of the blind body 16 is provided. Since everything except the channel is shielded, the suction force of the pump 22 acts only on the narrow channel, and the sand or the like Sa accumulated at the bottom of the channel 1 can be reliably sucked and discharged. Moreover, since the suction force of the pump 22 acts only up to a portion slightly upstream of the tip portion 16A of the cord-shaped body 16, sand Sa or the like accumulated on the bottom 1b of the water channel 1 may be agitated with water in the upper layer. Absent.

The second embodiment is shown in FIGS. 6 to 8 and is an example in which a sludge recovery device 10 having a rectangular plan view is provided with a sludge recovery device 10 to recover the sludge accumulated on the bottom 2b of the sedimentation tank 2. . Figure 6
As shown in, the drive shaft 11 arranged along one short side of the rectangle of the sedimentation tank 2 is rotatably supported by a bearing or the like so that it can be rotated at a desired speed by starting the motor M ₁ or the like. To In the lower part of the side walls 2a on both sides of the sedimentation tank 2 in the longitudinal direction,
As shown in FIG. 8, a step portion 2a ₁ is formed, and a side wall 2a ₂ below the step portion 2a ₁ projects inward so that sludge is accumulated on the bottom 2b of the settling tank 2. Guide member 12, as shown in FIG. 6, are arranged along the longitudinal direction of both side walls 2a of the sedimentation basin 2, a vertical guiding groove Gs ₁ extending in a substantially vertical direction, to said longitudinal guide grooves Gs ₁ an arcuate guide groove Gs ₂ continuous, lateral guide grooves G extending in the horizontal direction substantially continuous with the circular arc-shaped guide groove Gs ₂
and s _3, the arc-shaped guide groove Gs continuous to the lateral guiding grooves Gs _3
4 and a short vertical guide groove Gs ₅ continuous with the arc-shaped guide groove Gs ₄ and extending in the vertical direction. Each guide groove Gs ₁
As in the first embodiment, each of Gs ₅ to Gs ₅ is made of a steel mold CM having a U-shaped cross section, and a ridge CMa is provided on the inner facing surface thereof.

A driven shaft 13 arranged along the other short side of the rectangle of the sedimentation tank 2 is rotatably supported by a bearing or the like. Similar to the first embodiment, the chain wheels Cw ₁ and Cw ₂ are respectively provided on the drive shaft 11 and the driven shaft 13 above the step portion 2a ₁ of the side walls 2a.
To fix. If necessary, the arc-shaped guide groove G
A rotary shaft may be provided at the center of the arc of s ₂ and Gs ₄ , a chain wheel may be provided on this rotary shaft, and chains 14A and 14B may be hung on and guided by the chain wheel. Chains 14A, 14
B is hung on the chain wheel Cw ₁ and the chain wheel Cw ₂ , passed through the guide grooves Gs _{1 to} Gs ₅ of the guide bodies 12 on both sides, and is connected endlessly. Chain 14A, 14B configuration of the chain 14A, the relationship between the protrusions CMa mold layer CM constituting the guide groove Gs ₁ ~Gs ₅ and 14B, and the configuration of the suction device 20 is the same as in Example 1. The seal plate 18 has a portion from one edge thereof on the center side of the settling basin of the U-shaped cross-section material CM that constitutes the vertical guide groove Gs ₁ and the arc-shaped guide groove Gs ₂ , and the lateral guide groove Gs. _It is attached to the upper part of the mold material CM of U-shaped cross section which constitutes ₃ . As shown in FIGS. 6 and 8, the suction device 2 is brought into contact with one of the short sides of the rectangle of the sedimentation tank 2.
0 is arranged, the suction body 21 is installed in the lower part 2b ₁ of the lowering of the sedimentation tank 2, and the suction port 21a is installed toward the center side of the sedimentation tank 2.

Next, a method of recovering sludge and the like using the recovery device 10 of the second embodiment will be described. Sewage or the like is poured into the settling tank 2 to settle sludge on the bottom thereof. When a large amount of sludge accumulates on the bottom, and then the motor etc. M ₁ is activated to move each chain 14A, 14B along the guide grooves Gs _{1 to} Gs ₅ etc. The tip portion 16A of the body 16 is located on the upper left side of the suction port 21a of the suction device 20. Then, the motor etc. M ₂ is started, the pump 22 is operated, and the suction force sucks and discharges the sludge accumulated under the portion below the tip of the blind 16 into the suction body 21 and the pump 22. It is transferred through the pipe 23 toward a storage part for a predetermined sludge or the like. The tip portion 16A of the blind 16 is sequentially moved to the right at a speed according to the suction speed of the sludge and the like, and the sludge and the like accumulated below the portion of the blind 16 is sucked into the suction member 21 and It is sucked into the pump 22 and is transferred through the discharge pipe 23 toward the storage part of sludge or the like. A flexible plate-like body 17 is attached to the upper side surface of the blind-like body 16, and the longitudinal guide groove Gs ₁ and the arc-shaped guide groove Gs ₂ are provided on the center side of the settling basin of the shape material CM and in the lateral guide. Groove Gs ₄
The gap between the upper part of the mold material CM and the side edges of the plate-like body 17 is covered with the seal plate 18, and the bottom 1 of the water channel 1 is covered.
Since all but the narrow flow passage between the b-side and the lower surface of the tip of the blind 16 are shielded, the suction force of the pump 22 acts only on the narrow flow passage and accumulates at the bottom of the water channel 1. It is possible to reliably aspirate and discharge sludge and the like. Moreover, pump 2
Since the suction force of No. 2 acts only on a portion on the right side of the tip portion 16A of the cord-shaped body 16, the sludge accumulated at the bottom 2b of the sedimentation tank 2 is not agitated with the water in the upper layer. In addition,
In Example 1, the guide except the grooves Gs ₅ ~Gs _8, the chain 14A, 14B and may be adapted to guide along the two-dot chain line in FIGS. 2 and 5.

[0014]

The present invention has the following effects (a) to (e) by having the structure described in the claims. (A) In the method according to claim 1, when a device for moving the plate-shaped shield is arranged, the suction port of the suction device is opened at the bottom of the water treatment facility, and sand, sludge, etc. are accumulated at the bottom. In addition, the tip of the plate-shaped shield is moved above the suction port, and the top of sand, sludge, etc. accumulated at the bottom is shielded at this tip, and the suction force of the suction device is By acting between the part and the bottom,
Suction and collect sand and sludge between the tip of the shield and the bottom, and move the shield to the upper side of the sand and sludge in front of the inlet, and use this shield to bottom. The upper side of the sand, sludge, etc. collected in the above is sequentially shielded, and the suction force of the suction device sucks and collects the sand, sludge, etc. between the shield and the bottom,
The sand, sludge, etc. can be efficiently collected without agitating the sand, sludge, etc. accumulated at the bottom with the water above it. Further, since the suction force of the suction device acts on the narrow flow path between the bottom and the plate-shaped shield, sand and sludge accumulated at the bottom of the water treatment facility can be used without increasing the suction force of the suction device. And the like can be sucked into the suction port of the suction device, and sand, sludge, etc. can be reliably collected by mixing pebbles. (B) In the device according to the second aspect, the suction device is provided with the suction port facing sideways, and the shield is moved so that the plate-shaped shield shields a desired portion above the bottom where sand, sludge and the like accumulate. Since the device is configured, the structure of the device is simplified, the operation is facilitated, and the facility cost, operating cost, etc. can be reduced. (C) The apparatus according to claim 3 is a plate in which a guide is provided along both side walls of the water treatment facility, and a water-impermeable membrane is attached to a blind-shaped body formed by connecting a number of rod-shaped bodies. Of the shield, and guides both sides of the plate-shaped shield with the guides, so that the desired portion above the bottom where sand, sludge, etc. accumulates is shielded by the shield. Because I configured the mobile device,
The plate-shaped shield can be moved accurately according to the suction amount of sand, sludge, etc., and sand, sludge, etc. can be efficiently collected. (D) In the device according to the fourth aspect, a large number of rod-shaped bodies are arranged between two endless chains arranged substantially in parallel and having a predetermined length, and both ends of each rod-shaped body are connected to the endless chain. A blind is formed, and an impermeable plate is attached to this blind to form a plate-shaped shield, and each endless chain is guided by guides provided along both side walls of the water treatment facility. However, since the drive device of the endless chain is configured so that the desired part on the upper side of the bottom where sand, sludge, etc. are accumulated is shielded by the shield, it is possible to accurately move the plate-shaped shield with a simple drive device. it can. (E) In the device according to claim 5, a narrow flexible seal plate is arranged between the guide body and the portions of the shield which are impermeable to the water from the opposite side edges. The portion from the edge of the seal plate is attached to the plate body of the guide body or the shield body, and the seal plate is pressed against the plate body of the shield body or the guide body by water pressure. The gap between the plate-shaped body and the guide can be closed, and the suction force of the suction device acts only on the narrow flow path between the bottom and the plate-shaped shield, increasing the suction force of the suction device. Even without it, sand, sludge, etc. can be reliably collected.

[Brief description of drawings]

FIG. 1 is a schematic plan view of a sand settling device provided in a sewer according to a first embodiment.

FIG. 2 shows the recovery device of the first embodiment when not in operation, taken along the line AA in FIG.
Side view cut by lines

FIG. 3 is a plan view of a chain of Example 1 and a blind-shaped body including a large number of rod-shaped bodies attached to the chain.

FIG. 4 is a main part of the recovery device in the operating state shown in FIG.
-Front view taken along the line B

5 is a side view of the recovery device during operation of the first embodiment taken along the line AA of FIG.

FIG. 6 is a schematic plan view of a sludge recovery device provided in a sedimentation tank of Example 2.

FIG. 7 is a side view of the sludge recovery device according to the second embodiment when not operating.

FIG. 8 is a view showing a main part of a sedimentation basin having a lateral guide groove according to the second embodiment.
Front view taken along the line CC

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Water channel 1a, 2a Side wall 1a ₁ , 2a ₁ Step part 1b, 2b Bottom 2 Sedimentation tank 10 Recovery device 11 Drive shaft 12 Guide body 13 Rotating shaft 14A, 14B Chain 14a Connecting piece 14b Guide body 14b ₁ Flange 14c, 15c Connecting pin 15 bar-shaped body 15a steel pipe 15b end plate 16 blind-shaped body 17 plate-shaped body 18 seal plate 20 suction device 21 suction body 21a suction port 22 pump 23 discharge pipe Sa sand CS U-shaped steel material CSa ridge Cw ₁ , Cw ₂ Chain wheel Gs _{1 to} Gs ₈ Guide groove M ₁ , M ₂ motor

Claims (5)

[Claims] 1. A method for moving a plate-shaped shield in a method for sucking and collecting sand, sludge and the like accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, and a sedimentation basin from a suction port of a suction device. The suction port of the suction device is opened at the bottom of the equipment, and when sand, sludge, etc. accumulates on the bottom, the tip of the plate-shaped shield is moved above the suction port, The upper part of the sand, sludge, etc. accumulated at the bottom of the shield is shielded, and the suction force of the suction device is applied between the tip of the shield and the bottom, and The sand, sludge, etc. in the area are suctioned and collected, and the shield is sequentially moved to the upper side of the sand, sludge, etc. in front of the suction port, and the upper side of the sand, sludge, etc. accumulated at the bottom by this shield is sequentially A shield for sand, sludge, etc. characterized by sucking and collecting sand, sludge, etc. between the shield and the bottom by the suction force of the suction device. How to. 2. A device for sucking and collecting sand, sludge and the like accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, and a sedimentation basin from a suction port of a suction device, the suction device being provided laterally A device for collecting settling sand, sludge, etc., characterized in that the shielding member and its moving device are configured so as to shield a desired portion on the upper side of the bottom where sand, sludge, etc. are accumulated with a plate-shaped shielding member. . 3. A device for sucking and collecting sand, sludge and the like accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, and a sedimentation basin from a suction port of a suction device, and the suction device is provided with the suction port facing sideways. Guides are provided along the side walls on both sides of the equipment, and a plate-shaped shield is formed by attaching a water-impermeable plate-shaped body to a blind-shaped body formed by connecting a number of rod-shaped bodies. Both sides of the screen-like shield are guided by the guides, and the shield moving device is configured so as to shield the desired part on the upper side of the bottom where sand, sludge, etc. are accumulated with the shield. A device for collecting settling sand and sludge. 4. A device for sucking and collecting sand, sludge and the like accumulated at the bottom of a water treatment facility such as a water channel, a sand basin, a sedimentation basin, etc. from a suction port of a suction device, the suction port being provided laterally. Guides are provided along the side walls on both sides of the equipment, and a large number of rod-shaped bodies are arranged between the predetermined length portions of the two endless chains arranged substantially in parallel. Is connected to an endless chain to form a blind-shaped body,
A watertight plate-like member is attached to this blind to form a plate-like shield, and each endless chain is guided by the guide,
A device for collecting settling sand, sludge, etc., characterized in that a drive device of an endless chain is configured so that a desired portion on the upper side of the bottom where sand, sludge, etc. are accumulated is shielded by the shield. 5. A flexible sealing plate having a narrow width between the guide body and a portion of the impermeable plate-shaped body attached to a blind-shaped body composed of a large number of rod-shaped bodies from both side edges. And a portion from the edge of the seal plate is attached to the plate body of the guide body or the shield body, and the seal plate is pressed against the plate body of the shield body or the guide body by water pressure. A device for collecting settling sand, sludge, etc. according to 3 or 4.