JP2007113321A - Reservoir hopper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reservoir hopper capable of well discharging waste water by self-eliminating clogging. <P>SOLUTION: In this reservoir hopper 10, waste water is separated from deposit and grit by a screen member 22. Since clogging occurs earlier if only the screen member 22 is used, a retaining plate 30 having slits 40, 40, ... formed therein is disposed on the screen member 22 on the inside of the hopper body 12 and the waste water is led to the screen member 22 through the slits 40, 40, ... to prevent the screen member 22 from being clogged. When it it detected that the slits 40, 40, ... of the retaining plate 30 clogged by deposit or grit is detected by the lowering of the discharged amount of waste water, a liquid feed pump 48 is driven to force-feed water to pipes 42, 42, ... to jet the water from liquid jetting ports 46, 46, ... to the slits 40, 40, .... Consequently, the clogging of the slits 40, 40, ... can be eliminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a storage hopper containing sewage generated from water to be treated such as sewage and storing sediment and sediment, and more particularly to a storage hopper intended to drain sewage well.

  Sediment and sediment removed in the sand basin of the sewage treatment plant are temporarily stored in a storage hopper and drained with sewage, and then transported to a truck for landfill processing.

The storage hopper disclosed in Patent Document 1 is provided with a shield plate having a slit formed at a corner portion of a hopper body formed in a substantially square shape, so that the corner portion and the shield plate can prevent the upper portion of the hopper body. A drainage channel communicating with the lower part is formed. Further, a drain pipe that communicates with the drainage channel is provided at the lower portion of the hopper body. According to this storage hopper, the sewage contained in the residue and sedimentation flows out to the drainage channel through the slit of the shielding plate, and is drained to the outside through the drainage channel from the drainage channel.
JP 2001-31214 A

  However, since the storage hopper disclosed in Patent Document 1 has a function of a screen member for separating sewage from sediment and sedimentation, only the slit formed in the shielding plate has a slit so that only sewage can pass through. It is necessary to form a smaller width. For this reason, clogging occurs early in the slit, and since there is no means for eliminating clogging by itself, cleaning must be performed by an operator whenever clogging occurs. It was inconvenient. Further, in the storage hopper of Patent Document 1, slits are formed in the horizontal direction, and are formed at predetermined intervals along the vertical direction. For this reason, if the upper surface level of the residue and sedimentation is at a position where no slit is formed between the upper slit and the lower slit, there is also a problem that drainage efficiency of sewage falls. .

  This invention is made | formed in view of such a situation, and it aims at providing the storage hopper which can drain | sew dirty water favorably by eliminating clogging by itself.

  In order to achieve the above object, the invention according to claim 1 of the present invention is a storage hopper having a substantially square shape that stores sewage and sediment and sediment. The screen member allows sewage to pass through the corner of the hopper body. The drainage channel for draining the sewage is defined by the screen member and the corner portion, and the drainage port communicating with the drainage channel is formed in the hopper body, and the screen member has an inside of the hopper body. Is provided with a press plate in which a plurality of slits for passing sewage are formed at a predetermined interval, and the screen member is provided with a liquid jet port at a position corresponding to the slit of the press plate, and the liquid jet port supplies a liquid. It is connected to the means.

  According to the first aspect, the screen member separates the sewage from the residue and the sediment. However, if only the screen member is clogged, a press plate is provided inside the hopper body of the screen member. A slit is formed in the plate, and sewage is introduced into the screen member through the slit. When the slit of the presser plate inside the hopper main body is clogged by residue or sedimentation, fluid is ejected from the liquid ejection port of the screen member toward the slit to eliminate the clogging. Thereby, a slit can be formed larger, and since the malfunction can be solved by itself even when the slit is clogged, dirty water can be drained well.

  According to a second aspect of the present invention, in the first aspect, the screen member is configured by arranging a plurality of pipe members in a vertical direction with a predetermined gap, and the liquid jet port is provided in the pipe member. It is characterized by being formed.

  According to the second aspect, the screen member is configured by arranging the plurality of pipe members in the vertical direction with a predetermined gap. That is, a gap between adjacent pipe members becomes a filter that allows only sewage to pass through. Further, since it is a tube member, it is not necessary to form a dedicated channel for guiding the liquid to the liquid ejection port, so that the liquid ejection function can be easily added to the screen member.

  According to a third aspect of the present invention, in the second aspect, the pipe members are wound around a wire and connected to each other, and are arranged in parallel at a predetermined interval.

  According to the third aspect of the present invention, the screen member is configured by winding and connecting the tube member around the wire and arranging the tube member in parallel at a predetermined interval. Therefore, a screen member having a simple structure can be provided.

  According to a fourth aspect of the present invention, in the first, second, or third aspect, the slit of the presser plate is formed to be inclined with respect to the level of sediment and sedimentation stored in the hopper body, and The lower end portion of the slit located at the upper portion and the upper end portion of the slit located below are formed so as to be located on substantially the same horizontal plane.

  According to claim 4, the slit of the presser plate is formed to be inclined with respect to the level of sediment and sedimentation stored in the hopper body, and the lower end of the slit located above and the slit located below Are formed so that the upper end of each is positioned on substantially the same horizontal plane. Therefore, regardless of the position of the upper surface level of the residue and sedimentation, the upper surface level always hits the slit, so that high drainage efficiency can be maintained.

  A fifth aspect of the present invention is the plate according to the first, second, third, or fourth aspect, wherein the presser plate is constituted by a plurality of plate-like bodies formed in a substantially parallelogram shape and is located above. By providing a gap between the body and the lower plate-like body, the slit is formed between the lower side portion of the upper plate-like body and the upper side portion of the lower plate-like body. The lower side portion of the plate-like body positioned above is formed to be inclined toward the inside of the hopper body.

  According to the fifth aspect of the present invention, since the presser plate is constituted by a plurality of plate-like bodies, the slit can be easily formed, and the lower side portion of the plate-like body located above the hopper body like the clapboard Since it is formed to incline toward the inner side, a large residue can be prevented from passing through the slit.

  According to the storage hopper according to the present invention, the slit can be formed larger, and even when the slit is clogged, the problem can be solved by itself, so that the sewage can be drained well.

  Hereinafter, preferred embodiments of a storage hopper according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a front view of a storage hopper 10 according to the embodiment, and FIG. 2 is a top view of the storage hopper 10. As shown in FIG. 1, the hopper main body 12 of the storage hopper 10 is formed in a square shape of an inverted quadrangular pyramid, and an inlet 14 containing sewage and into which sediment and sand are poured is formed at the top, and sewage is drained. A discharge port 16 is formed in the lower part for discharging the consolidated residue and sediment.

  A pair of gates 18 and 18 for closing the discharge port 16 are provided at the lower part of the hopper body 12. These gates 18 and 18 are rotatably supported by shafts 20 and 20 provided on the side of the hopper main body 12 or in the vicinity of the hopper main body 12, and are each rotated in the direction of arrow A in FIG. And the discharge port 16 is opened. As a result, the residue and sand settled in the hopper main body 12 are dropped and transferred to the truck waiting under the discharge port 16.

  By the way, the storage hopper 10 is provided with a screen member 22 through which sewage passes at the four corner portions 13 of the hopper body 12 as shown in FIG. Further, the screen member 22 and the corner portion 13 define a substantially triangular prism-shaped drainage flow path 24 for draining dirty water in the vertical direction. Further, as shown in FIG. 1, a drain port 26 communicating with the drain channel 24 is formed in the lower portion of the hopper body 12. The sewage discharged from the drain 26 flows down to the gate 18, flows along the inclined surface of the gate 18, and flows down from the gap 19 between the gate 18 to the trough 28. The ridge 28 is disposed along the gap 19 and is fixed to the gate 18 on the left side of FIG. 1, and the sewage flowing down to the ridge 28 is drained to a sewage treatment unit (not shown) through the ridge 28.

  As shown in FIG. 3, the screen member 22 is sandwiched between a pair of presser plates 30 and 32, and the presser plate 30 inside the hopper main body 12 is fixed to the hopper main body 12 by bolts 34 and nuts 36. It is fixed.

  The holding plates 30 and 32 are disposed to be inclined from the inlet 14 of the hopper body 12 toward the outlet 16. Further, as shown in FIG. 4, the presser plate 30 is configured by arranging a plurality of plate-like bodies 38, 38... Formed in a substantially parallelogram shape vertically. Further, by providing a gap between the upper plate-like body 38 and the lower plate-like body 38, the lower side portion of the upper plate-like body 38 and the lower plate-like body 38 are provided. A slit 40 through which dirty water passes is formed between the upper side and the upper side. Furthermore, as shown in FIG. 5, the lower side portion 39 of the plate-like body 38 positioned above is formed to be inclined like a clapboard toward the inside of the hopper body 12.

  Further, as shown in FIG. 4, the slit 40 is formed to be inclined with respect to the residue stored in the hopper body 12 and the level of sedimentation (sewage level) L, and the lower end portion 40A of the slit 40 positioned above. And the upper end 40B of the slit located below are formed so as to be located on the same horizontal plane. Accordingly, when viewed from the level of sediment and sedimentation (sewage level) L, the slit 40 is formed as if it were continuous from the upper part to the lower part of the presser plate 30. Therefore, the level L hits the slit 40 regardless of the position of the level L. Since the presser plate 32 has the same configuration as the presser plate 30, the same reference numerals as those of the presser plate 32 are used here, and the description thereof is omitted.

  On the other hand, the screen member 22 is composed of a plurality of pipes (tube members) 42, 42, as shown in FIG. 3, and these pipes 42, 42,... Are fixed with a wire 44 indicated by a two-dot chain line in FIG. Thus, a predetermined gap serving as a filter is formed between the pipes 42, 42. In FIG. 6, the gaps are exaggerated.

  Further, a liquid ejection port 46 is formed in the pipes 42, 42. The liquid ejection port 46 is formed to face the slit 40 as shown in FIG. Further, the pipe 42 in which the liquid injection port 46 is formed is connected to a liquid feed pump 48 (liquid supply means), and water fed by pressure from the liquid feed pump 48 is supplied. The water passes through the pipe 42 and is jetted from the liquid jet port 46 toward the slit 40.

  Next, the operation of the storage hopper 10 configured as described above will be described.

  Sediment and sediment containing sewage, which are introduced from the inlet 14 of the hopper body 12 by a conveyor (not shown), are stored in the hopper body 12. At this time, as time passes, the sewage rises to the upper layer of the residue and the sand, and the upper layer is filled with the sewage. This dirty water passes through the slit 40 of the press plate 30, passes through the gaps between the pipes 42, 42... That are the screen members 22, and flows into the drainage flow path 24 from the slit 40 of the press plate 32. Thereafter, the sewage flows down the drainage flow path 24 and flows from the drainage port 26 to the gates 18 and 18, and is drained to the outside through the trough 28 provided along the gap 19 between the gates 18 and 18.

  The storage hopper 10 of the embodiment separates sewage from sediment and sedimentation by the screen member 22, but if only the screen member 22 is clogged at an early stage, the inside of the hopper body 12 of the screen member 22, The presser plate 30 in which the slits 40, 40... Are arranged and the sewage is guided to the screen member 22 through the slits 40, 40.

  When the clogging due to the slits 40, 40... Slag or sedimentation of the presser plate 30 is detected due to a decrease in the amount of sewage drainage, the liquid feed pump 48 is driven to feed water to the pipes 42, 42. Then, water is ejected from the liquid ejection ports 46, 46... Toward the slits 40, 40, so that clogging of the slits 40, 40.

  As a result, the slit 40 can be formed larger, and when the slit 40 is clogged, the problem can be solved by itself. Thereby, storage hopper 10 of an embodiment can drain sewage well.

  Further, since the screen member 22 of the embodiment is configured by the pipe 42, it is not necessary to form a dedicated channel for guiding the liquid to the liquid ejection port 46. Therefore, the liquid ejecting function can be easily added to the screen member 22. Further, the screen member 22 is configured by connecting the pipes 42, 42... Around the wire 44 and connecting them at a predetermined interval, so that the screen member 22 has a simple structure.

  On the other hand, the slit 40 of the presser plate 30 is formed so as to be inclined with respect to the level L of sediment and sedimentation stored in the hopper body 12 and is positioned below the lower end portion 40A of the slit 40 positioned above. Since the upper end portion 40B of the slit 40 is formed so as to be positioned on substantially the same horizontal plane, the upper surface level L always hits the slit 40 regardless of the position of the upper surface level L of the residue and the sediment. Thereby, compared with the conventional apparatus, high drainage efficiency can be maintained.

  Further, since the presser plate 30 is constituted by a plurality of plate-like bodies 38, 38..., The slit 40 can be easily formed. Further, since the lower side portion 39 of the plate-like body 38 positioned above is formed to be inclined toward the inside of the hopper main body 12 like a clapboard, it is possible to prevent a large screen residue from entering the slit 40.

Front view of storage hopper of embodiment Top view of the storage hopper shown in FIG. Enlarged view of the main part showing the corner of the storage hopper Front view of main parts of presser plate provided in storage hopper Sectional drawing which follows the BB line of the presser plate shown in FIG. Schematic diagram of a screen member constructed by connecting pipes with wires.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Storage hopper, 12 ... Hopper main body, 13 ... Corner part, 14 ... Inlet, 16 ... Discharge port, 18 ... Gate, 22 ... Screen member, 24 ... Drain channel, 26 ... Drain port, 28 ... Soot, 30, 32 ... Presser plate, 38 ... Plate-like body, 40 ... Slit, 42 ... Pipe, 44 ... Wire, 46 ... Liquid injection port, 48 ... Liquid feed pump

Claims (5)

In a storage hopper with a substantially square shape that stores sewage, sediment, and sand.
By providing a screen member for passing sewage at the corner part of the hopper body, a drainage channel for draining sewage is defined by the screen member and the corner part, and a drainage port communicating with the drainage channel is a hopper body. Formed into
On the inner side of the hopper body of the screen member, there is provided a presser plate in which a plurality of slits through which dirty water passes are formed at a predetermined interval,
The storage hopper, wherein the screen member is formed with a liquid ejection port at a position corresponding to the slit of the presser plate, and the liquid ejection port is connected to a liquid supply means.   2. The screen member according to claim 1, wherein the screen member is configured by arranging a plurality of tube members in a vertical direction with a predetermined gap, and the liquid injection port is formed in the tube member. Storage hopper.   The storage hopper according to claim 2, wherein the pipe members are wound and connected to a wire, and are arranged in parallel at a predetermined interval.   The slit of the presser plate is formed to be inclined with respect to the level of sediment and sedimentation stored in the hopper body, and has a lower end portion of the slit located above and an upper end portion of the slit located below. The storage hopper according to claim 1, wherein the storage hopper is formed so as to be positioned on substantially the same horizontal plane. The presser plate is constituted by a plurality of plate-like bodies formed in a substantially parallelogram shape, and by providing a gap between the plate-like body located above and the plate-like body located below, The slit is formed between the lower side of the plate-like body located above and the upper side of the plate-like body located below, and the lower side of the plate-like body located above faces the inside of the hopper body. The storage hopper according to claim 1, wherein the storage hopper is inclined.

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