JP2005023829A - Pump device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact pump device separating solid foreign matter from sewage and allowing it to flow into a pumping well, coping with unknown water like a large amount of rainfall. <P>SOLUTION: This pump device is equipped with a first water introduction channel P1 introducing sewage flowing into an inflow water channel 2 to the pumping well 8 through a pump 7, and a second water introduction channel P2 directly introducing the sewage, overflowing the inflow water channel 2, to the pumping well 8. The first water introduction channel P1 is provided with solid foreign matter separating tanks 5, 6 separating the solid foreign matter from the sewage and allowing it to flow into the pumping well 8 and discharging the separated solid foreign matter into a drainage 9 by the pump 7 along with the sewage collected in the pumping well 8. The second water introduction channel P2 is provided with a filtration mechanism 4 separating the solid foreign matter from the sewage and allowing it to flow into the pump well 8. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pump device including a pump well that stores inflow sewage and a pump that discharges sewage stored in the pump well to a drain pipe.
[0002]
[Prior art]
Conventionally, as a pump device for draining sewage such as sewage mixed with solid foreign matters such as garbage in a sewage relay pumping station, a manhole pumping station, a middle or small drainage pumping station, for example, as shown in FIG. Pump devices are known. In the pump device, sewage mixed with solid foreign matters such as trash is introduced into the pump well 8 from the sewage inflow pipe 1 through the inflow channel 2, and the sewage stored in the pump well 8 to a predetermined water level is pumped. The drainage pipe 9 is pumped and discharged by a plurality of vertical submersible pumps 7 arranged in the well 8. An inflow gate 12 that can be opened and closed is installed at the inlet of the inflow water channel 2. On the downstream side of 12, a coarse screen 13 that removes relatively large solid particles such as large pieces of wood, empty cans, cloth scraps, etc. contained in the sewage, and a crusher 14 that crushes the solid foreign matter that has passed through the coarse screen 13 are moved up and down. It is installed so as to be movable up and down via the device 15.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 11-210073
[Problems to be solved by the invention]
By the way, according to the above-described conventional pump device, it is necessary to provide a crusher, and it is necessary to use an expensive pump for draining sewage mixed with solid foreign matters as well as the size of the device, and crushing When using the machine, clogging may occur due to the problem that scum that emits a bad odor tends to occur, or crushed foreign matter mixed in the sewage passing through the pump from the suction port to the discharge port. In some cases, the operation of the pump is stopped and complicated maintenance work is required.
[0005]
Therefore, as shown in FIG. 4, the applicant of the present application installs a filtration device 21 for collecting solid foreign matter in the discharge passage 20 communicating with the discharge port 7 a of the pump 7, and discharges from the filtration device installation position of the discharge passage 20. A non-return for connecting the sewage inflow pipe 22 to the downstream side in the flow direction, allowing the sewage inflow pipe 22 to flow sewage from the upstream side to the discharge passage 20, and preventing backflow from the discharge passage 20 to the sewage inflow pipe 22. A pump device provided with a valve 23 has been proposed (Japanese Patent Application No. 2002-224537).
[0006]
According to the pump device, the sewage that flows into the discharge passage 20 from the sewage inflow pipe 22 and collects solid foreign matters by the filtration device 21 flows through the pump 7 and is stored in the pump well 8. The sewage stored in the pump well 8 is pumped up, and the filtration device 21 is backwashed and drained from the discharge passage 20 to the discharge port 24 together with the solid foreign matter, so that the solid foreign matter does not pass through the pump 7 and is clogged. Generation can be reliably prevented.
[0007]
However, according to the above-described configuration, since the sewage from which the solid foreign matters are separated cannot be allowed to flow into the pump well during the pump operation, there is a problem that it is not possible to deal with unknown water generated during a large amount of rainfall, or filtration. Since the apparatus is installed in the discharge passage, there is a problem that the maintenance work of the filtration apparatus becomes complicated.
[0008]
In view of the above-mentioned conventional drawbacks, the present invention provides a compact pump device that can deal with unknown water such as during heavy rainfalls while separating solid foreign substances from sewage and flowing into a pump well. In the point.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the first characteristic configuration of the pump device according to the present invention is stored in the pump well for storing the incoming sewage and the pump well as described in claim 1 of the claims. And a pump device for discharging the sewage to the drain pipe, wherein the sewage flowing into the inflow water channel is guided to the pump well through the pump, and overflows from the inflow water channel A second water conduit that directly conducts the sewage to the pump well, and separates the solid foreign matter from the sewage through the first water conduit and passes it through the pump well, and is stored in the pump well by the pump. In addition to providing a solid foreign matter separation tank for draining the solid foreign matter separated together with the sewed water into the drain pipe, a filtration mechanism for separating the solid foreign matter from the sewage and flowing it to the pump well is provided in the second water conduit. Lies in the fact are.
[0010]
According to the above configuration, for normal inflow of sewage, sewage in a state where solid foreign matter is separated by the solid foreign matter separation tank through the first water conduit is stored in the pump well and reaches a predetermined water level. When the pump is activated, the solid foreign matter separated in the solid foreign matter separation tank together with the sewage stored in the pump well is drained to the drain pipe, so that the solid foreign matter does not flow through the pump. Therefore, occurrence of clogging of the pump is surely prevented.
[0011]
And when unknown water is generated due to heavy rain, etc., even if the tail pump is in operation, sewage with solid foreign matter separated by the filtration mechanism can be stored in the pump well through the second water conduit. It becomes.
[0012]
As described in claim 2 of the same column, the second characteristic configuration is that, in addition to the first characteristic configuration, the solid foreign matter separation tank is installed in a dry pit.
[0013]
According to the above-described configuration, the maintenance work can be performed very easily on the spot without performing a complicated work such as lifting the heavy solid object from the water.
[0014]
In the third feature configuration, as described in claim 3 of the same column, in addition to the first or second feature configuration, the solid foreign matter separation tank allows inflow of sewage from the inflow channel into the tank. In addition, a check valve for preventing the backflow of sewage from the tank to the inflow channel is provided, and a filtration mechanism for preventing the flow of solid foreign matters is provided at the flow port with the pump well.
[0015]
By adopting the above configuration, in the process of flowing sewage into the pump well from the first conduit, the solid foreign matter can be reliably captured in the tank without flowing into the pump well, and the pump well is drained. When sewage is drained into the pipe, the solid foreign matter trapped in the tank is surely drained into the drain pipe without flowing back into the inflow channel.
[0016]
In the fourth feature configuration, as described in claim 4 of the same column, in addition to any of the first to third feature configurations, the pump is configured by a submersible pump disposed in the pump well. In the point.
[0017]
If it is a submersible pump, even a large-capacity pump can be easily water-cooled, so the cooling mechanism can be made smaller than the air pump, and the pump device as a whole can be made smaller. It becomes possible.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of a pump device according to the present invention will be described below based on the flow sheet shown in FIG. The pump device installed in the sewage relay pump station includes a pump well 8 for storing sewage from the inflow pipe 1 and a vertical submersible pump (hereinafter simply referred to as “ 2) two first water conduits that are provided with 7 and that receive the sewage flowing in from the inflow pipe 1 and guide the sewage that has flowed into the inflow water 2 to the pump well 8 via the pump 7. P1 and the 2nd water conveyance path P2 which directly guides the sewage which overflowed from the inflow water channel 2 to the pump well 8 are comprised.
[0019]
The inflow water channel 2 is composed of a closed water channel whose bottom portion is inclined downstream from the connection portion of the inflow pipe 1, and a relatively large piece of wood contained in the sewage water flowing in from the inflow pipe 1 at the central portion of the inflow water channel 2, A coarse screen 3 having a mesh size of about 100 mm is provided to remove coarse solid foreign matters such as empty cans and cloth scraps, and the sewage flowing through the coarse screen 3 passes through the first water conveyance path P1 or the second water conveyance path P2 and the pump well. 8 is stored.
[0020]
In the first water conveyance path P1, the sewage after separating the small foreign matter from the sewage flowing through the coarse screen 3 is passed from the discharge port of the stopped pump 7 to the pump well 8 through the suction port, Solid foreign matter separation tanks 5 and 6 for draining solid foreign matter separated together with the sewage stored in the pump well 8 by the operation of the pump 7 to the drain pipe 9 are provided.
[0021]
The solid foreign matter separating tanks 5 and 6 allow the sewage inlets 5a and 6a to allow the inflow of sewage from the inflow channel 2 into the tub and prevent the backflow of sewage from the tub to the inflow channel 2. 5b and 6b are provided, and screens 5d and 6d having a mesh size of about 10 mm are provided in the vicinity of the flow ports 5c and 6c with the pump well 8 as a filtration mechanism for preventing the flow of solid foreign matters. , 6d is configured so that solid foreign matter trapped in the tank is drained from the drain ports 5e and 6e to the drain pipe 9 together with the sewage in the pump well 8 sucked from the suction port of the pump 7 and discharged from the discharge port. Has been. At this time, the foreign matter adhering to the screens 5d and 6d is backwashed with dirty water.
[0022]
The solid foreign matter separation tanks 5 and 6 are installed in a dry pit 11 constructed on the side of the pump well 8, and the inflow water channel 2 and the pump well 8 are connected to each other through a pipe. Therefore, when maintenance is required for the solid separation tanks 5 and 6, the worker can directly enter the dry pit 11 and easily perform necessary processing such as cleaning.
[0023]
The second water conveyance path P2 is a flow path in which sewage overflowing the weir formed by the wall portion of the inflow water channel 2 flows into the pump well 8, and in the upper space of the weir, there is a pump well for solid foreign matters mixed in the sewage. A screen 4 having a mesh size of about 10 mm is provided as a filtration mechanism for preventing flow to 8.
[0024]
With the above-described configuration, normally, as shown by the broken line and the solid line in FIG. 1, the sewage from which the solid foreign matter is separated and removed through the solid foreign matter separation tank 5 of one of the two first water conduits P1. Are guided to the pump well 8, and the pumps 7 are operated alternately so that the sewage stored in the pump well 8 is sent from the solid foreign matter separation tank 6 of the other path to the water distribution pipe 9. Further, in preparation for an unexpected situation, a preliminary pump 70 for draining the sewage from the pump well 8 to the water distribution pipe 9 is provided. When the planned maximum amount of sewage flows into the pump well 8, the spare pump 70 is also activated to allow drainage. It is configured.
[0025]
On the other hand, for the unknown water generated during heavy rain, solid foreign matter is separated by the screen 4 via the second water conduit P2 while both pumps 7 are operated and drained into the drain pipe 9. The removed sewage is configured to be able to flow into the pump well 8, and is configured to be able to operate all units with the spare pump 70 also operated.
[0026]
A specific configuration of the above-described pump device will be described with reference to FIGS. A coarse screen 3 is provided in the inflow channel 2 for receiving the sewage flowing in from the inflow pipe 1, and the pair of solid foreign matter separation tanks 5 (6) installed in the dry pit 11 at the lower portion of the downstream side wall of the inflow channel 2. The inlet of the sewage transfer pipe 50 (60) is opened. The sewage flowing into the solid foreign matter separation tank 5 (6) from the sewage transfer pipe 50 (60) is pumped through the sewage transfer pipe 51 (61) connected to the discharge port 7a (7a) of the pump 7 (7). 7 (7) is configured to flow into the pump well 8 from the suction port 7b (7b), and thus the first water conduit P1 is configured.
[0027]
On the other hand, when it is detected by a water level sensor (not shown) that sewage of a predetermined water level has been stored in the pump well 8, one pump (7) 7 is activated and the suction port (7b) of the pump (7) 7 is activated. ) The sewage of the pump well 8 is sucked from 7b and flows into the solid foreign matter separation tank (5) 6 via the sewage transfer pipe (51) 61 connected to the discharge port (7a) 7a of the pump (7) 7. . The sewage flowing into the solid foreign matter separation tank (5) 6 is transported to the water distribution pipe (9) 9 via the transport pipe (52) 62 along with the solid foreign matter trapped in the tank. The discharge port of the auxiliary pump 70 is directly connected to the water distribution pipe 9 in the pump well 8. The drain pipe 9 is connected in series with a maintenance valve 9a and a check valve 9b for preventing backflow of sewage to the pump well 8.
[0028]
A maintenance valve 50a (60a) is connected to the sewage transfer pipe 50 (60) connected to the solid foreign matter separation tank 5 (6) installed in the dry pit 11, and the valve 50a (60a) is connected during maintenance. After closing, the upper lid flange portion of the solid foreign matter separation tank 5 (6) is opened so that internal cleaning and inspection can be performed.
[0029]
On the downstream side of the coarse screen 3 installed in the inflow channel 2, a side wall (not shown) adjacent to the pump well 8 is configured as a weir, and solid foreign matter is removed from the sewage flowing over the weir and flowing into the pump well 8. The screen 4 to remove is arrange | positioned and the 2nd water conveyance path P2 is comprised by it.
[0030]
In embodiment mentioned above, although what provided the two 1st water conveyance path | routes P1 was demonstrated, the 1st water conveyance path | route may be single and may be comprised by two or more paths. In addition, the specific materials and mesh sizes constituting the coarse screen 3, the screen 4, and the screens 5d and 6d are not limited to those described in the above-described embodiment, and the types of pumps and sewage that are actually installed, etc. It is appropriately set according to the various situations.
[0031]
In the embodiment described above, the pump 7 is configured as a submersible pump, but the type of pump is not limited to the submersible pump, and may be configured as an air pump.
[0032]
【The invention's effect】
As described above, according to the present invention, it is possible to separate a solid foreign substance from sewage and flow into a pump well, while providing a compact pump device that can cope with unknown water such as during a large amount of rainfall. I was able to do it.
[Brief description of the drawings]
FIG. 1 is a flow diagram of a pump device. FIG. 2 is an explanatory diagram of the pump device, where (a) is a plan view of a water channel, (b) is a cross-sectional view along line aa in (a), and (c) is a cross-sectional view. It is a bb line sectional view of (a). [Fig. 3] An explanatory diagram of a conventional pump device. [Fig. 4] An explanatory diagram of a conventional pump device.
1: Inflow pipe 2: Inflow water channel 3: Coarse screen 3
4: Screen 5: Solid foreign matter separation tank 6: Solid foreign matter separation tank 7: Pump 8: Pump well 9: Drain pipe 11: Dry pit P1: First water conduit P2: Second water conduit

Claims (4)

A pump device comprising a pump well that stores inflow sewage and a pump that discharges sewage stored in the pump well to a drain pipe,
A first water conveyance path for guiding the sewage flowing into the inflow water channel to the pump well through the pump, and a second water flow path for directly conveying the sewage overflowed from the inflow water channel to the pump well,
Solid foreign matter separation tank for separating solid foreign matter from sewage and passing it through the pump well in the first water conduit, and draining the solid foreign matter separated together with the sewage stored in the pump well by the pump to a drain pipe And providing
The pump apparatus which provided the filtration mechanism which isolate | separates a solid foreign material from sewage, and makes it flow in the said pump well in said 2nd water conveyance path. The pump device according to claim 1, wherein the solid foreign matter separation tank is installed in a dry pit. The solid foreign matter separation tank is provided with a check valve that allows inflow of sewage from the inflow water channel into the tank and prevents reverse flow of the sewage from the inside of the tank to the inflow water channel, and is connected to the pump well. The pump device according to claim 1 or 2, wherein a filtration mechanism for preventing the passage of solid foreign matters is provided at the mouth. The said pump is a pump apparatus in any one of Claim 1 to 3 comprised with the submersible pump arrange | positioned in the said pump well.

Images