JP2001214879A - Bottom sampling strainer for submergible pump having excavating function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bottom sampling strainer for a submergible pump requiring no agitating blade and pressure water injection for gathering sand and soft mud accumulated on a water bottom surface by using the submergible pump. SOLUTION: In bottom sampling equipment for enabling this submergible pump to travel and move by placing the submergible pump on a crane arranged on a pontoon or a water tank so as to be freely liftable, the strainer provided on the suction end of the submergible pump is connected by a suction pipe adjusted to a suction diameter. The suction pipe lower end adjusted to the excavating depth is slantingly expanded in an umbrella shape to be constituted so as to form an acute angle with a bottom plate arranged in the shape of covering an opening bottom surface. The outer peripheral edge is formed so as to become an excavating blade. Openings are bored in large numbers over the whole periphery on an umbrella-shaped inclined face leaving an excavating blade part of the outer peripheral edge. A large number of openings are bored in an inner peripheral surface leaving the excavating blade part of the outer peripheral edge in the bottom plate to open the area required for sucking water and mud.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to water treatment facilities, seas, rivers,
Equipment and facilities for collecting and removing sediment, such as sand and mud, sludge, and sludge, which settle and deposit on the inner bottom surface of lakes, marshes, water tanks, and the like using a pump.

[0002]

2. Description of the Related Art Conventionally, a method of collecting and removing sediment using a submersible pump includes a barge, a crane provided on a water tank, or the like, a cylinder having a body diameter substantially equal to the outer diameter of a suction cover. A submersible pump with a stirring blade protected by a protective frame or a similar submersible pump that sprays and pressurizes water around the strainer, with a shaped strainer and further protruding downward from the strainer, In many cases, the sediment is moved up and down, and the precipitate is sucked and collected while being stirred.
o. No. 1513733, Patent No. There is also a scraper type, such as 1555393, which has an excavation blade and mechanically powerfully excavates and collects mud.

[0003]

Generally, muddy soils such as rivers and lakes contain a large amount of various contaminants. In the case of using a submersible pump equipped with stirring blades, a string or cloth is wrapped around. , Collisions with masses, vibrations, breakage,
Peripheral re-contamination is inevitable, and even in the case of jetting pressurized water, not only the pump power for pressure water is required, but also the contaminant diffusion around the perimeter becomes severe.

[0004] When collecting soft sediment in a sedimentation tank of a water treatment facility under relatively stable conditions, it is necessary to avoid resuspension of the sediment as much as possible and to collect and remove the sediment in a quiet state. In addition, a submersible pump with no stirring equipment is mounted on a crane or the like so as to be able to move up and down and travels to move and extract the mud. The body diameter of the strainer of the submersible pump is usually 3 to 5 times the suction port diameter. The sediment in the forward direction becomes compacted by the strainer, and most mud is pushed to the left and right.Only the mud pushed from the mesh of the strainer has no consolidation of mud and has low inflow resistance. It is loosened by the water sucked from almost half the circumference on the rear side in the direction, and the mud is absorbed.

[0005] Further, even when the suction port is directly opened in a bell mouth shape without a strainer at the water suction end of the submersible pump, the bell mouth shape is stable because the bell mouth shape opening surface is a flat surface facing downward. There is a problem that it is difficult to secure a water absorption opening area, and it is necessary to perform a low-speed low-concentration mud sampling operation to secure the stability of the mud sampling operation.

[0006] When performing a mud sampling operation by moving the submersible pump in a hanging state, the moving speed of the submersible pump directly affects the mud suction concentration.
If it is too early, the submersible pump will be tilted, and only the surrounding pollution will become intensely diffused, and low-concentration mud sampling work is likely to occur. It is very difficult to match the speed with the movement.

[0007] Also, in the coterie patent No. No. 1513733, Patent No. Even in a mud sampling facility employing 1555393, the presence of a mechanically movable part in the underwater part under severe conditions has a problem that impurities or abrasion easily cause trouble.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a submersible pump is attached to a barge or a crane provided on a water tank so that the submersible pump is vertically movable or vertically movable. In the facility for traveling and collecting the sediment, the strainer provided at the suction end of the submersible pump was connected to the suction pipe corresponding to the diameter of the submersible pump with a flange or the like, so that the strainer was adjusted to the mud sampling depth. The lower end of the suction pipe having a length is inclined and expanded downward in an umbrella shape, and a bottom plate surface provided so as to cover an open bottom surface is inclined by 45 degrees from 30 degrees.
It is configured to have an acute angle of about degrees, and the outer peripheral edge is formed in a shape of a cutting edge. Further, around the umbrella-shaped inclined portion where the outer peripheral edge excavation blade portion is left, a large number of opening / closing holes having a size suitable for the submersible pump are formed, and the inner peripheral surface where the outer peripheral edge excavation blade portion is also left on the bottom plate. Similarly, a number of holes are formed on the surface, a necessary suction area is opened, and a mud sampling strainer having a cutting edge on the outer peripheral edge is formed and mounted.

[0009] The underwater pump equipped with the mud sampling strainer of the present invention is used to extract the soft sediment without contacting the bottom surface of the aquarium with a submersible pump, or is mounted on a crane provided on the aquarium so that the sediment can be moved up and down so that the sediment is run. In the equipment to perform, although the planar shape of the outer peripheral edge excavation blade of the mud sampling strainer does not hinder the circular shape, it is equipment that needs to be collected in contact with relatively hard sediment or bottom concrete of the water tank, In the case where the submersible pump travels and moves in a hanging state, the planar shape of the outer peripheral excavation blade of the mud sampling strainer is formed into a square or a triangle so that rolling in the horizontal direction is eliminated, and a wider range is provided in a stable posture. Enables the mud sampling work.

[0010]

When the submersible pump equipped with the above-described mud sampling strainer of the present invention is suspended from a barge or crane to remove sedimentary mud, the submersible pump is operated along with the progress of the mud sampling by the submersible pump. The traveling resistance due to the mud applied to the mud sampling strainer is the excavation resistance taking into account the wedge effect applied to the inclined surface from the excavation blade according to the excavation depth, and the pushing pressure resistance applied to the suction pipe cylindrical part. The resistance is much smaller than the displacement resistance applied to the front half of the large cylindrical strainer, almost half the circumference, and the tilting of the submersible pump can be greatly reduced.

Further, as the mud sampling progresses, the mud excavated by the excavation blades on the outer peripheral edge of the mud sampling strainer and pushed up to the umbrella-shaped inclined surface forms a wide range of the umbrella-shaped inclined surface except the rear of the suction pipe cylindrical portion. It becomes a state of covering while sliding, and is sucked into the mud sampling strainer so as to slide down from the opening constriction hole provided in the umbrella-shaped inclined surface, and the opening constriction of the part located behind the suction pipe cylindrical part and not directly covered with excavated mud soil Only the hole absorbs the diluted suspension water to mix and eliminate the mud inside the mud sampling strainer and prevent a completely closed state, thus enabling stable high-concentration mud sampling.

When the speed of the submersible pump is too fast, the submersible pump tilts greatly forward, but the mud excavated by the front excavation blade portion covers a portion of the mud sampling strainer other than the suction pipe behind the suction pipe thickly. The mud that has not been sucked down from the constricted hole is escaped to the rear as it progresses, and collapses to the rear of the mud sampling strainer to form a high-concentration suspension. The mud inside sucked from the narrow hole and slid down from the open hole on the upper slope is mixed and eliminated, and the back of the suction pipe is not directly covered with the excavated mud, so the mud sampling strainer is completely blocked. The state can be prevented, and the high-concentration mud sampling operation can be continued.

[0013] However, the outer peripheral edge of the mud sampling strainer has a circular cutting plane, and is used for collecting relatively hard sedimentary mud or for contacting the bottom surface of a concrete water tank. In such cases, the submersible pump tilts, the excavation width narrows, the amount of excavated mud decreases, and the mud concentration tends to be lean.In addition, the submersible pump easily rolls left and right and loses stability. The use of a triangular or quadrilateral excavation blade on the outer peripheral edge of the mud sampling strainer increases the grounding width, allowing a wide range of mud to be excavated and collected in a stable posture, Even in a small amount of mud sampling operation, a mud sampling operation with a higher concentration can be performed.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, a mud sampling strainer 1 according to the present invention is installed in a bolt hole provided in a suction end suction cover 2a of a submersible pump 2 in advance. In this embodiment, a submersible pump 2 equipped with a mud sampling strainer 1 is mounted on a sedimentation tank 11 as shown in FIG. Suspended by a hoist crane 15 on a hanging tower 14 provided on the upper traversing carriage 13, the submersible pump 2 descends according to the amount of sediment 20 deposited,
After operation, the traveling garter 12 or the traversing carriage 13
While performing the traveling movement.

The mud sampling strainer 1 is suitable for use as described above, for example, FIG. 3 (a) shows a side view of a circular plane shape, and FIG. 3 (b) shows FIG. 3 (a) from below the flange 1a. As shown in the plan view of the lower side and the bottom view of FIG. 3 (a) viewed from below in FIG. 3 (c), the suction pipe portion 1b corresponding to the diameter of the pump is set below the flange 1a at the depth of the mud sampling. And a bottom plate 1d provided so as to cover the bottom surface of the lower opening by forming an inclined portion 1c having a lower end inclined and enlarged in an umbrella shape.
It is configured so as to form a 0 ° inclination angle θ, and the outer peripheral edge tip is formed in a shape of a cutting edge. A large number of small opening holes 1g are provided, and a large number of similar opening and closing holes 1h are also provided on the inner peripheral surface of the bottom plate 1d except for the excavation blade portion on the outer peripheral edge.

Similarly, FIG. 4 shows the collection of relatively hard mud,
Alternatively, FIG. 4 (d) is a side sectional view, and FIG. 4 (d) shows an embodiment of a mud sampling strainer having a square outer peripheral edge excavation blade portion suitable for performing mud sampling work in contact with the concrete in the tank.
(E) is a plan view of the flange viewed from below, FIG.
(F) is a bottom view as viewed from below.

FIG. 5 shows an embodiment in which the outer peripheral edge excavation blade portion has a triangular plane shape so that the ground contact surface is further lengthened. FIG. 5 (g) is a side sectional view, and FIG. A plan view from below and a bottom view from below are shown in FIG. 5 (R). The triangular mud sampling strainer of this embodiment can not only remove a wider range of mud but also remove it. If the equipment is made to be able to perform the mud sampling with the intersection corner 1j of the excavating blade at the head, it is possible to perform effective excavating and collecting even with hard sediment.

In the embodiment shown in FIG. 6, the outer peripheral edge excavation blade portion has a square-shaped inclined surface 1e and a round iron 1f.
In this embodiment, the manufacturing is simplified.
Fig. 6 (nu) is a side view, Fig. 6 (lu) is a plan view seen from below the flange, and Fig. 6 (ヲ) is a bottom view seen from below.

Next, an embodiment of the mud sampling strainer at the time of the mud sampling operation will be described with reference to the drawings. When operating under the optimum conditions, the submersible pump suspended on the wire 16 as shown in FIG. 2 tilts slightly forward and operates with the bottom plate 1d rear of the strainer 1 slightly open, and the sediment 20 pushed up on the inclined surface 1c of the mud sampling strainer 1 as the vehicle travels, It is slipped down from the opening constriction hole 1g into the strainer 1 and sucked, and the mud sampling strainer 1
In the case of a soft and lightweight sediment, the sediment 20 below the strainer 1 is mixed with the slightly inflowing water from the rear, and is sucked through the constricted hole 1h of the bottom plate 1d. You.

However, when the mud sampling depth is too deep, or when the traveling speed is too high and exceeds the mud sampling capability of the submersible pump 2, the submersible pump 2 is large as shown in FIG. The sediment 20 that has been tilted forward and pushed up by the inclined surface 1c of the mud sampling strainer 1 escapes to the rear of the mud sampling strainer 1 without being sucked in its entirety, and falls and remains. 8, the sediment 20 pushed up on the inclined surface 1c is pushed right and left by the suction pipe portion 1b, and the upper surface of the inclined surface 1c is formed on the sediment 20. A void 21 is formed that is not directly covered, and not only prevents the mud sampling strainer 1 from being completely closed, but also forms a highly concentrated suspension state with mud that collapses from the left and right, and almost all of the water absorption of the submersible pump 1 Is the space 21 To have also become a condition to be al inhalation opening 窄穴 1 facing the high concentration aqueous suspension into said void 21
g, and suction through the opening narrowing hole 1h on the entire surface of the bottom plate 1d opened greatly rearward, so that efficient high-concentration mud sampling can be continued.

[0021]

As described above, the mud sampling strainer of the present invention makes the configuration around the submersible pump for the sediment collection and removal equipment extremely simple and more reliable than the stirring blade type or pressure water type mud sampling equipment. Mechanical excavation or stripping on the top of the mud sampling strainer not only enables high-concentration mud absorption, but also minimizes the surrounding pollution and stirs blades or agitation pressure. The effect of eliminating water not only can significantly reduce equipment costs and maintenance costs, but also has a large energy saving effect.Especially, in the sedimentation tank of water treatment equipment, it is possible to remove sediment during operation of the equipment, In the removal of sedimentary mud in rivers, there are significant economic effects such as prevention of re-contamination of surrounding water due to re-floating and enabling environmentally friendly de-mudging.

[0022]

[Brief description of the drawings]

FIG. 1 is a side view of an embodiment of a mud sampling strainer 1 mounted on a submersible pump 2. FIG.

FIG. 2 shows a cross-sectional view of the example equipment mounted on a crane.

FIG. 3 shows a side view (a), a plan view (b) as viewed from below the flange, and a bottom view (c) of the embodiment in the form of a circular plane.

FIG. 4 shows a side sectional view (d) of the embodiment of a planar square, a plan view (e) as viewed from below the flange, and a bottom view (f).

FIG. 5 shows a side sectional view (g) of the embodiment of a planar triangle, a plan view (h) viewed from below the flange, and a bottom view (g).

FIG. 6 shows a side view (nu), a plan view viewed from below the flange (l), and a bottom view (ヲ) of a planar square embodiment in which an opening hole is formed of round iron.

FIG. 7 is an explanatory diagram during a mud sampling operation, and is a state assumption diagram during normal mud sampling (W) and tilted mud sampling (F).

FIG. 8 is an imaginary view of a state at the time of tilting and collecting mud work viewed from below the flange.

[Explanation of symbols]

 1. Sampling strainer. 1a, flange. 1b, suction tube. 1c, inclined surface. 1d, bottom plate. 1e, inclined surface. 1f, round iron. 1 g, opening constriction hole. 1h, opening hole. 1j, corners of the outer peripheral cutting edge. 1k, one side of the outer peripheral cutting edge. 11, settling tank. 12. Running garter. 13. A trolley. 14. Hanging tower. 15. Hoist crane. 16. Wire. 17. Downstream gutter. 18. Downflow ditch. 19. Mud hose. 20, sediment. 21, sediment gaps. θ, tilt angle.

Claims (3)

[Claims] 1. A bottom plate in which a lower end of a suction pipe connected to and connected to a suction port of a submersible pump is inclined downward and enlarged in an umbrella shape so as to cover an open bottom surface,
It is configured to form an acute angle of about degrees, and the outer peripheral edge is formed in a shape of a digging blade. Further, the umbrella-shaped inclined surface with the outer peripheral edge excavated blade portion is provided with a large number of aperture constrictions throughout the entire circumference, and the bottom plate is also provided with a large number of open constricted holes on the inner peripheral surface with the outer peripheral edge excavated blade portion left. A mud sampling strainer for submersible pumps with an excavation function that can perform water absorption and mud absorption. 2. A strainer for a submersible pump according to claim 1, wherein the outer peripheral edge excavating blade has a square or triangular planar shape. 3. A pump equipped with a submersible pump mud sampling strainer according to claim 1 or 2 is mounted on a barge or a crane provided on a water tank so as to be able to move up and down, and run and move. A mud sampling facility that can collect sediment.