JP3880367B2 - Inflow dredging facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an inflow dredge facility.
[0002]
[Prior art]
Generally, sewage treatment facilities include a sewage treatment facility that performs sewage treatment and a pump station facility that is provided when it is impossible to send water to the sewage treatment facility under natural flow. Among these, the pump station facilities include a sewage pump station facility that supplies sewage to a sewage treatment facility and a rainwater pump station facility that discharges rainwater to a river.
[0003]
As shown in FIGS. 4 and 5, the rainwater pumping station facility passes through the inflow trough 2, which is dug down one level lower than the inflow trough 2 to receive inflow water such as rainwater from the trunk line 1. A sedimentation basin 3 for sinking sand from the inflow water and a pump well 4 for installing a main pump (not shown) for pumping the inflow water from which sand or the like has been removed in the sand basin 3 are provided.
[0004]
An inlet gate 5 and a front screen 6 for collecting large contaminants are provided on the inlet side of the inlet rod 2 described above. In addition, a rear screen 7 for collecting small impurities and an outflow gate 8 are provided between the sand basin 3 and the pump well 4. Among these, the front screen 6 has a coarse vertical stripe shape (vertical stripe shape) with a mesh width of about 100 mm. The rear screen 7 has a fine vertical stripe shape (vertical stripe shape) with a mesh width of about 25 mm to 50 mm.
[0005]
For example, as shown in FIG. 6, the inflow trough 2 has a bottom surface 10 that is substantially horizontal and flat, and is provided with, for example, two stages of gradually expanding shape portions 11 and 12 whose output side expands with respect to the input side. A plurality of partition walls 14 are provided to partition the inflow trough 2 and the sand basin 3 into a plurality of flow paths from the parallel portion 13 between the gradually expanding shape portions 11 and 12 of the inflow trough 2 to the sand basin 3. .
[0006]
Although it is possible not to provide the inflow trough 2, if the inflow trough 2 is not provided, the sand basin 3 will be considerably large. In order to reduce the scale of the sand basin 3, The inflow trough 2 is basically provided.
[0007]
The sand basin 3 includes a sand collection reservoir 15 and a pump pit 16 as sand collection equipment in each flow path. The sand reservoir 15 has an inclined surface having a required area that inclines toward the pump pit 16 and accumulates in the sand collecting nozzle 17 and the pump pit 16 for collecting sand collected on the inclined surface toward the pump pit 16. A pump pit sand collecting nozzle (not shown) for collecting sand toward the pump is provided, and a pump pit stirring nozzle (not shown) for stirring the sand pump suction port (not shown). In the pump pit 16, a sand pump 18 is provided as a sand raising facility.
[0008]
The pump well 4 is provided with the main pump (not shown) for pumping water and a sand collecting water pump 21 for feeding the accumulated water of the pump well 4 to the sand collecting nozzle 17 of the sand basin 3. .
[0009]
[Problems to be solved by the invention]
However, such conventional inflow dredging facilities have the following problems.
[0010]
In other words, the inflow trough 2 is provided on the entry side of the sand sink basin 3 in order to allow the sedimentation of sand in the sand settling basin 3 to be performed efficiently and to easily collect sand. Although it is designed so that it does not occur, in some cases, sand may sink in the inflow trough 2 depending on the situation, and sand may accumulate in the inflow trough 2.
[0011]
However, since the inflow trough 2 is basically not equipped with a facility for collecting sand, it has been difficult to remove the sand accumulated in the inflow trough 2.
[0012]
Therefore, an object of the present invention is to provide an inflow dredge facility capable of solving the above-described problems and removing sand accumulated in the inflow dredge.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention described in claim 1, the inflow dredge equipment provided between the trunk line and the sand basin is settling on the horizontal and flat bottom surface of the inflow dredge main body. sand and provided with a conveying device for transporting the sand basin Rutotomoni, said transport device is characterized in that the inflow sewer facilities a guide groove formed on the inflow sewer main.
According to the invention concerning Claim 1 comprised in this way, sand can be conveyed toward a sand settling basin by the guide groove formed in the inflow tub main body as a conveying apparatus.
The invention described in claim 2 is an inflow dredging facility provided between the main line and the sand basin, and the sedimented sand is directed to the sand basin on the horizontal and flat bottom surface of the inflow dredge body. In addition, the transport device is characterized in that the transport device is an inflow soot facility that is an inclined surface of a V-shaped cross section formed in the inflow soot body.
According to the invention according to claim 2 configured as described above, the sand is collected to the lower side of the inclined surface by the inclined surface of the V-shaped cross section formed in the inflow trough body as the conveying device, and then toward the sand basin. Can be transported.
The invention described in claim 3 is an inflow dredging facility provided between the trunk line and the sand basin, and the sedimented sand is directed to the sand basin on the horizontal and flat bottom surface of the inflow dredge body. In addition, the transport device is characterized by an inflow dredge facility that is a sand collecting nozzle provided in the inflow dredge main body.
According to the invention concerning Claim 3 comprised in this way, sand can be conveyed toward a sand settling basin by using the sand collection nozzle provided in the inflow tub main body as a conveying apparatus.
The invention described in claim 4 is characterized in that a guide groove is provided in the inflow rod main body, and inclined surfaces having a V-shaped cross section are provided on both sides of the guide groove.
According to the invention concerning Claim 4 comprised in this way, by providing the inclined surface of a V-shaped cross section in the both sides of a guide groove, sand is collected to a guide groove in an inclined surface, and toward a sand basin Sand can be conveyed.
The invention described in claim 5 is characterized in that a guide groove is provided in the inflow trough body, and the sand collecting nozzle is provided in the guide groove.
According to the invention concerning Claim 5 comprised in this way, by providing a sand collection nozzle in a guide groove, sand can be conveyed toward a sand settling basin by a guide groove and a sand collection nozzle.
The invention described in claim 6 is characterized in that an inclined surface having a V-shaped cross section is provided in the inflow basket main body, and the sand collecting nozzle is provided on the inclined surface.
According to the invention concerning Claim 6 comprised in this way, by providing a sand collection nozzle in an inclined surface, sand can be conveyed toward a sand settling basin by an inclined surface and a sand collection nozzle.
In the invention described in claim 7, a guide groove is provided in the inflow trough body, an inclined surface having a V-shaped cross section is provided on both sides of the guide groove, and the sand collecting nozzle is provided in the guide groove. It is characterized by.
According to the invention according to claim 7 configured as described above, the sand collecting nozzle is provided in the guide groove having the inclined surface with the V-shaped cross section on both sides, thereby collecting and collecting sand in the guide groove on the inclined surface. Sand can be transported to the sand basin with the sand nozzle.
The invention described in claim 8 is characterized in that an inclined angle with respect to a horizontal direction as a reference is at least 45 ° at least on the inlet side of the inflow rod main body of the inclined surface.
According to the invention of claim 8 configured in this way, the angle of repose of the sand is ensured by setting the angle of inclination at least on the inlet side of the main body of the inclined surface to 45 ° or more with respect to the horizontal direction. Thus, the sand on the inclined surface can be surely collected below the inclined surface. The repose angle of sand is an angle necessary for sand to slide down along the inclined surface. In general, the angle of repose of sand is about 45 ° with respect to the horizontal direction.
The invention described in claim 9 is characterized in that the inclination angle based on the horizontal direction on the exit side of the inclined surface is made smaller than the inclination angle based on the horizontal direction on the entry side.
According to the invention according to claim 9 configured as described above, the inclination angle based on the horizontal direction on the exit side of the inclined surface is made smaller than the inclination angle based on the horizontal direction on the entry side, It becomes possible to design to keep the height of the inclined surface low.
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, specific embodiments of the present invention will be described together with illustrated examples.
[0026]
1 to 3 show an embodiment of the present invention. Note that portions that are the same as or equivalent to those of the conventional example are denoted by the same reference numerals, and description thereof is omitted.
[0027]
In this embodiment, a transport device 31 (auxiliary sand collecting facility) for transporting sand toward the sand basin 3 is provided in the main body of the inflow trough 2.
[0028]
As the conveying device 31, for example, the guide groove 32 is formed on the horizontal and flat bottom surface 10 of the main body of the (existing) inflow trough 2. At least one guide groove 32 is provided for each flow path partitioned by the partition wall 14.
[0029]
An inclined surface 33 having a V-shaped cross section is formed on both sides of the guide groove 32.
[0030]
An inclination angle α with reference to the horizontal direction at least on the main body entrance side of the inflow rod 2 of the inclined surface 33 is set to 45 ° or more.
[0031]
Then, the height of each inclined surface 33 is set so as not to affect the main line 1 and is substantially constant, and if necessary, the inclination angle β with respect to the horizontal direction on the exit side of the inclined surface 33 is set as the input side. The inclination angle α is set to be smaller than the inclination angle α based on the horizontal direction .
[0032]
In FIG. 2, the number of guide grooves 32 for each flow path is set to two for each of the above requirements.
[0033]
For example, a sand collecting nozzle 35 is provided as the transport device 31. The sand collecting nozzle 35 is disposed inside the guide groove 32 so as to inject water toward the exit side. Further, the sand collecting nozzles 35 are provided at at least two places, that is, the entrance side portion of the guide groove 32 and the exit side portion of the intermediate portion.
[0034]
In FIG. 3, the code | symbol 40 is a cooling water tank.
[0035]
Next, the operation of this embodiment will be described.
[0036]
In this embodiment, the sand can be transported toward the sand basin 3 by the transport device 31 (auxiliary sand collecting facility) provided in the main body of the inflow trough 2. Thereby, it is possible to prevent sand from collecting in the inflow trough 2. Alternatively, sand accumulated in the inflow trough 2 can be removed. In addition, the conveying apparatus 31 can be used in a state in which water flows into the inflow trough 2 or can be used in a state in which the water in the inflow trough 2 has been drained.
[0037]
In addition, in the inflow trough 2, there are a case where sand naturally accumulates and a case where sand accumulates due to an artificial action although very rarely. Of these, the case where sand accumulates due to an artificial action means, for example, the case where the inflow gate 5 is fully closed and the main pump is left unstarted. By doing in this way, since the flow in the inflow trough 2 and the sand basin 3 is lost, sand sinks.
[0038]
By forming the guide groove 32 in the main body of the inflow trough 2 as the transport device 31, the sand can be transported toward the sand settling basin 3 using the guide groove 32.
[0039]
At this time, sand can be collected in the guide groove 32 through the inclined surface 33 by forming the inclined surface 33 having a V-shaped cross section on both sides of the guide groove 32.
[0040]
By setting the inclination angle α of the inclined surface 33 at least on the main body entrance side of the inflow trough 2 to 45 ° or more, the repose angle of the sand is secured and the sand on the inclined surface 33 is surely collected in the guide groove 32. Can do.
[0041]
Further, by making the inclination angle β on the exit side of the inclined surface 33 smaller than the inclination angle α on the entry side, the inflow trough 2 has the gradually expanding shape portion 12 so that the exit-side flow path width is widened. Even in this case, the height of the entire inclined surface 33 can be suppressed to a height that does not affect the main line 1.
[0042]
Furthermore, a sand collecting nozzle 35 is provided inside the guide groove 32 as the transport device 31, and the sand in the guide groove 32 can be transported toward the sand basin 3 by using the sand collecting nozzle 35.
[0043]
In addition, by providing the conveying device 31 such as the guide groove 32, the inclined surface 33, and the sand collecting nozzle 35 on the bottom surface 10 of the main body of the existing inflow trough 2, the existing inflow trough 2 can be improved inexpensively and easily. it can.
[0044]
【The invention's effect】
As described above, according to the first aspect of the present invention, sand can be conveyed toward the sand basin by the guide groove formed in the inflow tub main body as the conveying device.
According to invention of Claim 2, sand can be conveyed toward a sand basin after collecting sand to the lower side of an inclined surface by the inclined surface of the V-shaped cross section formed in the inflow tub main body as a conveying apparatus.
According to invention of Claim 3, sand can be conveyed toward a sand settling basin by using the sand collection nozzle provided in the inflow tub main body as a conveying apparatus.
According to the invention of claim 4, by providing inclined surfaces with V-shaped cross sections on both sides of the guide groove, it is possible to collect sand into the guide groove on the inclined surface and transport the sand toward the sand basin. .
According to the invention of claim 5, by providing the sand collecting nozzle in the guide groove, the sand can be conveyed toward the sand settling basin by the guide groove and the sand collecting nozzle.
According to invention of Claim 6, by providing a sand collection nozzle in an inclined surface, sand can be conveyed toward a sand settling basin by an inclined surface and a sand collection nozzle.
According to the seventh aspect of the present invention, the sand collecting nozzle is provided in the guide groove having the inclined surface with the V-shaped cross section on both sides, thereby collecting the sand into the guide groove on the inclined surface, and the sand collecting nozzle to the sand settling basin. The sand can be transported toward.
According to the eighth aspect of the present invention, the angle of repose of the inclined surface relative to the horizontal direction at least on the inlet side of the inflow tub main body is set to 45 ° or more, so that the angle of repose of the sand is secured, and the sand on the inclined surface is secured. Can be reliably collected to the lower side of the inclined surface.
According to the ninth aspect of the present invention, the height of the inclined surface is lowered by making the inclination angle based on the horizontal direction on the exit side of the inclined surface smaller than the inclination angle based on the horizontal direction on the entry side. It can be designed to be suppressed.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
3 is a cross-sectional view taken along the line AA in FIG.
FIG. 4 is a side sectional view of a conventional example.
FIG. 5 is a plan view of FIG. 4;
6 is a cross-sectional view taken along the line BB in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Main line 2 Inlet dredging 3 Sand basin 31 Conveying device 32 Guide groove 33 Inclined surface 35 Sand collection nozzle (alpha) Inclination angle (entrance side)
β Inclination angle (exit side)

Claims (9)

Inflow dredging facilities provided between the main line and the sand basin,
On a horizontal and flat bottom surface of the inlet culvert body, Rutotomoni provided transport apparatus for transporting precipitated sand or the like to the settling basin, that the conveying device is a guide groove formed on the inlet sewer main Characteristic inflow dredging equipment. Inflow dredging facility provided between the main line and the sand basin,
On the horizontal and flat bottom surface of the inflow trough body, a transport device for transporting the settled sand and the like toward the sand basin is provided, and the transport device is an inclined surface of the V-shaped cross section formed in the inflow trough body. Inflow dredging facility characterized by being. Inflow dredging facility provided between the main line and the sand basin,
Provided on the horizontal and flat bottom surface of the inflow dredge main body is a conveying device that conveys sedimented sand and the like toward the sand basin, and that the conveying device is a sand collecting nozzle provided in the inflow dredge main body. Characteristic inflow dredging equipment. The inflow dredge equipment according to claim 1 or 2, wherein a guide groove is provided in the inflow dredge main body, and inclined surfaces having a V-shaped cross section are provided on both sides of the guide groove. The inflow dredge equipment according to claim 1 or 3, wherein a guide groove is provided in the inflow dredge main body, and the sand collecting nozzle is provided in the guide groove. The inflow dredge equipment according to claim 2 or 3, wherein the inflow dredge main body is provided with an inclined surface having a V-shaped cross section, and the sand collecting nozzle is provided on the inclined surface. 4. The guide groove according to claim 1, wherein a guide groove is provided in the inflow trough body, an inclined surface having a V-shaped cross section is provided on both sides of the guide groove, and the sand collecting nozzle is provided in the guide groove. The inflow dredge equipment according to any one of the above. The inflow rod according to any one of claims 2, 4 and 6 to 7, wherein an inclination angle with respect to a horizontal direction is at least 45 ° on at least the inflow rod main body entrance side of the inclined surface. Facility. 9. The tilt angle based on the horizontal direction on the exit side of the inclined surface is made smaller than the tilt angle based on the horizontal direction on the entry side. The inflow dredging facility described in the section.

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