JP2004332365A - Sewage booster pump - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sewage booster pump facility having a small-scaled and simple structure and easy in maintenance works, and further, capable of preventing from clogging materials. <P>SOLUTION: The sewage booster pump facility is provided with residue separation tanks 7A, 7B, submerged pumps 8A, 8B, separation valves 9A, 9B, and bringing-in and-out structures 13A, 13B for the submerged pumps 8A, 8B. The residue separation tanks 7A, 7B are connected to an inflow pipe 2 and a water feed pipe 3. The outlet opening 8b of the submerged pumps 8A, 8B is detachably connected to the residue separation tanks 7A, 7B, and the suction opening 8a is opened into a manhole 6. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a sewage relay pumping facility for sending sewage in a sewer.
[0002]
[Prior art]
BACKGROUND ART Conventionally, there are various sewage relay pump facilities for sending sewage in a sewer. For example, a manhole pump type and a solid separation type are known as this type of sewage relay pump equipment.
[0003]
With reference to FIGS. 22 and 23, a known manhole pump type sewage relay pump facility will be described. An inflow pipe 201 is connected to the manhole 200 buried underground. The discharge ports of the two submersible pumps 203A and 203B arranged in the manhole 200 are connected to the water supply pipe 202 via pumping pipes 204A and 204B. A ball valve 206, a check valve 207, and an air vent valve 208 are provided in each of the pumping tubes 204A and 204B. The discharge ports 218 of the submersible pumps 203A and 203B and the lower ends of the water pumps 204A and 204B are not fixed by means such as bolts, and the submersible pumps 203A and 203B can be moved up and down along the guide pipes 210A and 210B. . In addition, a pre-swirling tank 211 is provided at the bottom of the manhole 200 facing the suction ports of the submersible pumps 203A and 203B.
[0004]
The sewage flowing into the manhole 200 from the inflow pipe 201 is sucked from the suction ports 219 of the submersible pumps 203A and 203B while water, earth and sand, and residue remain mixed, and is discharged from the discharge ports via the pumping pipes 204A and 204B. From the water pipe 202 to the downstream side. By swirling the sewage sucked into the submersible pumps 203A and 203B in the pre-swirling tank 211, sedimentation at the bottom of the manhole 200 is prevented. When maintenance or a failure occurs, the manhole cover 212 is opened, and the submersible pumps 203A and 203B are lifted on the ground along the guide pipes 210A and 210B to perform necessary work.
[0005]
Solid separation type sewage relay pump equipment is described in, for example, Patent Documents 1 and 2.
[0006]
The solid separation type sewage relay pump equipment will be described with reference to FIGS. A sewage storage tank 105 is arranged in a pit 100 installed on the ground or buried underground. In the sewage storage tank 105, sediment separation apparatuses 101A and 101B are arranged. Inflow pipes 102A and 102B and discharge pipes 103A and 103B are connected to the residue separation tanks 101A and 101B. Further, connection pipes 115A and 115B for connecting the respective residue separation tanks 101A and 101B and the wastewater storage tank 105 are provided, and pumps 113A and 113B are interposed in these connection pipes 115A and 115B. Separation valves 117A and 117B for separating sewage from sewage are attached to ends of connection pipes 115A and 115B that open in the sewage separation tanks 101A and 101B. The connection pipes 115A and 115B are provided with normally open inflow gate valves 119A, 119B, 121A and 121B before and after the sewage pumps 113A and 113B.
[0007]
When the sewage pumps 113A and 113B are stopped, the sewage that has flowed into the sewage separation tanks 101A and 101B from the inflow pipes 102A and 102B is separated by the separation valves 117A and 117B, as indicated by broken arrows in FIG. After that, it flows into the sewage storage tank 105 via the connection pipes 115A and 115B. The residue separated from the wastewater accumulates in the residue separation tanks 101A and 101B.
[0008]
During operation of the sewage pumps 113A and 113B, as shown by solid arrows in FIG. 25, the sewage stored in the sewage storage tank 105 is removed by the sewage pumps 113A and 113B via the connection pipes 115A and 115B to remove the residue separation tank 101A, It is pumped into 101B. As a result, the sewage is sent downstream from the water pipes 103A and 103B together with the sewage accumulated in the sewage separation tanks 101A and 101B. Balls 107 floating on sewage are accommodated in the residue separation tanks 101A and 101B. As shown by a two-dot chain line in FIG. 25, when the wastewater is pumped by the wastewater pumps 113A and 113B, the connection part of the inflow pipes 102A and 102B of the residue separation tanks 101A and 101B is closed by the ball 107, and the connection to the inflow pipes 102A and 102B. Backflow of wastewater is prevented.
[0009]
[Patent Document 1]
German Patent No. 29505028U1
[Patent Document 2]
European Patent 074445041B1.
[0010]
[Problems to be solved by the invention]
The manhole pump type sewage relay pump equipment is superior to the solid separation type in that it is relatively small and has a simple structure. However, as described above, since the submersible pumps 203A and 203B inhale the sediment from the sewage without separating the same, there is a possibility that blockage due to foreign substances may occur.
[0011]
On the other hand, in the solid separation type sewage relay pumping equipment, the pumps 113A and 113B inhale the sewage from which the residue has been separated by the separation valves 117A and 117B, thereby preventing blockage due to foreign substances. However, the solid separation type equipment has a structure in which a pit 100 is further provided outside the sewage storage tank 105, and the sewage pumps 113A and 113B and the separation valves 117A and 117B are disposed in the pit 100. Compared with the mold, the equipment is large and the structure is complicated.
[0012]
Further, in the solid separation type equipment, since the pumps 113A and 113B and the separation valves 117A and 117B are all fixed to the connection pipes 115A and 115B by bolts or the like, an operator needs to be in the pit 100 at the time of failure or maintenance. It is necessary to release the fixing by bolts and the like. In this regard, the solid separation type equipment requires complicated operations such as maintenance. Further, since it is necessary to secure a sufficient space to allow the work in the pit 100, the installation area becomes large.
[0013]
The present invention has been made to solve the problems of these conventional wastewater relay pumping facilities, and has a small and simple structure with a small installation area, facilitates maintenance work, and prevents blockage of the pump due to impurities. It is an object of the present invention to provide a sewage relay pumping facility that can perform the operation.
[0014]
[Means for Solving the Problems]
The present invention is a sewage relay pumping facility that feeds sewage flowing from an upstream side through an inflow pipe to a downstream side through a water pipe, and includes a sewage storage tank, the inflow pipe and the water pipe. A wastewater separation tank disposed in the wastewater storage tank, wherein the wastewater separation tank is provided with a backflow prevention mechanism that is connected to allow inflow of wastewater from the inflow pipe but prevents backflow of wastewater into the inflow pipe; Is detachably connected to the sediment separation tank, while the suction port is opened into the sewage storage tank and permits the backflow of sewage from the discharge port to the suction port at the time of stoppage. A submerged pump disposed between the sewage separation tank and the discharge port of the pump to separate sewage from sewage flowing into the discharge port from the sewage separation tank; and Solid-liquid separation valve that permits the flow of sewage from And a loading and unloading mechanism for unloading and loading from the sewage reservoir, provides a wastewater relay pump equipment.
[0015]
The sewage flowing from the inflow pipe into the sediment separation tank flows into the sewage storage tank through the solid-liquid separation valve, the discharge port of the submersible pump in a stopped state, and the suction port of the submersible pump, and In the residue separation tank, the residue separated from the wastewater by the solid-liquid separation valve is accumulated. The sewage accumulated in the sewage storage tank flows from the suction port of the submersible pump in an operating state, into the sewage separation tank via the discharge port of the submersible pump, and the solid-liquid separation valve, and flows into the sewage separation tank. It is sent to the water pipe together with the residue accumulated in the tank.
[0016]
In the sewage relay pump equipment of the present invention, a residue separation tank, a submersible pump, and a solid-liquid separation valve are accommodated in a sewage storage tank. Therefore, a pit is further provided outside the sewage storage tank, and compared with the conventional solid separation type equipment in which a pump or the like is provided in the pit, the structure is small and the structure is simple.
[0017]
In addition, a discharge port of the submersible pump disposed in the sewage storage tank is detachably connected to the sewage separation tank, and a carry-in / out mechanism for carrying the submersible pump into and out of the sewage storage tank is provided. . Therefore, at the time of maintenance or failure, the submersible pump can be carried out of the sewage storage tank by the carrying-in / out mechanism to perform work, and workability is good.
[0018]
Further, since the submersible pump can be carried out of the sewage storage tank, it is not necessary to secure a space for an operator to enter the sewage storage tank and perform work. Therefore, the installation area of the equipment can be reduced as compared with the conventional solid separation type equipment.
[0019]
Furthermore, the submersible pump draws the sewage from which the residue has been separated by the solid-liquid separation valve accumulated in the sewage storage tank from the suction port and discharges it from the discharge port to the sewage separation tank. Blockage of the pump can be prevented.
[0020]
The carry-in / out mechanism is, for example, a vertically extending guide member disposed in the sewage storage tank, a guided member attached to a discharge port of the submersible pump, and movable along the guide member, A positioning mechanism for positioning the discharge port of the submersible pump with respect to the residue separation tank.
[0021]
The suction port of the submersible pump is opened facing the bottom of the sewage storage tank, and the bottom of the sewage storage tank further includes a pre-swirl structure for turning the sewage sucked into the suction port of the submersible pump. Is preferred. Alternatively, a suction port of the submersible pump is opened facing the bottom of the sewage storage tank, and a structure is provided at the bottom of the sewage storage tank, at least a part of which is inclined toward the suction port of the submersible pump. You may.
[0022]
With these structures, sediment contained in the sewage can be prevented from being deposited on the bottom of the sewage storage tank.
[0023]
It is preferable that a connecting portion between the inflow pipe and the residue separation tank is opened in the sewage storage tank.
[0024]
With such a configuration, even if a large amount of sewage suddenly flows into the sediment separation tank from the inflow pipe, some of the sewage flows into the sewage storage tank without passing through the sediment separation tank, so Stagnation can be prevented.
[0025]
For example, it is preferable that an interval is provided between the end of the inflow pipe and the residue separation tank, and a screen that covers the interval is further provided.
[0026]
With such a configuration, when a large amount of sewage suddenly flows into the sewage separation tank from the inflow pipe, the sewage from which the sewage is separated by the screen flows into the sewage storage tank, so that the submersible pump is less likely to be blocked. .
[0027]
The connection between the inflow pipe and the residue separation tank may be closed, and a slit, a hole, or a mesh may be provided in the residue separation tank near the connection with the inflow pipe. Alternatively, the upper part of the residue separation tank may be opened, and the end of the inflow pipe may be inserted into the residue separation tank. Also in this case, it is preferable to provide a slit, a hole, or a mesh on the upper part of the residue separation tank.
[0028]
For example, the solid-liquid separation valve is fixed to a discharge port of the submersible pump.
[0029]
Alternatively, the solid-liquid separation valve further includes a removable partition that divides the interior of the residue separation tank into a portion including a connection portion with the submersible pump and a remaining portion, and the solid-liquid separation valve is attached to the partition. ing.
[0030]
In such a configuration, the submersible pump and the solid-liquid separation valve can be separately carried out and carried in from the wastewater storage tank, so that the workability during maintenance and at the time of failure is further improved.
[0031]
In the sewage storage tank, two or more sets each including the residue separation tank, the submersible pump, and the solid-liquid separation valve are accommodated, and the two or more residue separation tanks are connected via a branch pipe. They are connected to each other and to the inflow pipe via the branch pipe.
[0032]
Even if a large amount of wastewater suddenly flows in from the inflow pipe and the waste separation tank of one unit becomes full, the wastewater flows into the waste separation tank of the other unit, and the wastewater overflows from the waste separation tank. Can be prevented.
[0033]
The sewage storage tank is, for example, a manhole buried underground. However, the sewage storage tank may be installed on the ground.
[0034]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0035]
(1st Embodiment)
FIG. 1 to FIG. 3 show a manhole type sewage relay pump equipment 1 according to a first embodiment of the present invention.
[0036]
The sewage relay pumping equipment 1 sends sewage flowing from an upstream side via an inflow pipe 2 to a downstream side via a water supply pipe 3. The sewage relay pump equipment 1 includes a manhole 6 that is a sewage storage tank. In the manhole 6, sewage separation tanks 7A and 7B, submersible pumps 8A and 8B, separation valves 9A and 9B that are solid-liquid separation valves, and The carrying-in / out mechanisms 13A and 13B of the submersible pumps 8A and 8B are arranged. The controller 10 shown only in FIG. 2 controls the operation of the submersible pumps 8 </ b> A and 8 </ b> B based on the input from the flood water level meter 11 and the float water level meter 12.
[0037]
The manhole 6 is buried in the ground, and an opening 6 a provided on the surface of the ground is closed by the manhole cover 5.
[0038]
The upper ends of the pair of residue separation tanks 7A and 7B are connected to the inflow pipe 2 via a common inflow tank 16 and a branch pipe 17. The inflow tank 16 forms a part of the residue separation tanks 7A and 7B. The inflow tank 16 may be omitted and the sewage may flow directly from the branch pipe 17 into the residue separation tanks 7A and 7B. The branch pipe 17 has both open ends connected to the residue separation tanks 7A and 7B, respectively, and has a central portion communicating with the bottom side of the inflow tank 16. Referring to FIG. 16 (A) and FIG. 18 (A) together, the inflow tank 16 is provided with an opening 16a at the upper end, and the opening end 2a of the inflow pipe 2 located above the inflow tank 16 has an opening end 2a. It faces the opening 16a with a space. In other words, the connecting portion between the inflow pipe 2 and the inflow tank 16 is not closed, but is open in the manhole 6. Further, a rectangular lattice screen 18 is attached so as to cover the space between the inflow tank 16 and the inflow pipe 2. A ball 19 is accommodated in the residue separation tanks 7A and 7B. As will be described later in detail, the ball 19 permits the inflow of sewage from the inflow pipe 2, but functions as a backflow prevention mechanism for preventing backflow of sewage into the inflow pipe 2. Further, each of the residue separation tanks 7A and 7B is connected to the water supply pipe 3 via pumping pipes 21A and 21B whose lower parts extend in the vertical direction. A ball valve 22, a check valve 23, and an air release valve 24 are interposed in the pumping pipes 21A and 21B. The residue separation tanks 7A and 7B are supported at the bottom of the manhole 6 by pedestals 26A and 26B.
[0039]
A pair of submersible pumps 8A, 8B are provided corresponding to the respective residue separation tanks 7A, 7B. The submersible pumps 8A and 8B have a discharge port 8b detachably connected to the sediment separation tanks 7A and 7B, and a suction port 8a opened in the manhole 6.
[0040]
4 and 5, the connection structure between the submersible pumps 8A and 8B and the residue separation tanks 7A and 7B will be described. First, a pipe portion 28 that protrudes in the horizontal direction is provided below the residue separation tanks 7A and 7B. The pipe portion 28 communicates with the inside of the waste separation tanks 7A and 7B on the base end side, and has an open end on the distal end side, and functions as an inlet and outlet for wastewater between the waste separation tanks 7A and 7B and the manhole 6. . On the other hand, a flange 8c having a larger diameter than the pipe 28 of the residue separation tanks 7A, 7B is provided at the tip of the discharge port 8b of the submersible pumps 8A, 8B. One separation valve (solid-liquid separation valve) 9A, 9B is attached to the flange 8c. A base end of a slider (guided member) 29 is fixed to an upper portion of the flange 8c. A hook-like projection 29a projecting downward is provided on the tip side of the slider 29. On the other hand, a hook-shaped second protrusion 28a that protrudes upward is provided on an upper portion of the tube portion 28. By locking these projections 28a and 29a to each other, the discharge ports 8b of the submersible pumps 8A and 8B are held in a state of being positioned in the pipe 28 on the side of the residue separation tanks 7A and 7B. Since the discharge port 8b and the pipe 28 are not fixed by bolts or the like, if the submersible pumps 8A and 8B are lifted, the submersible pumps 8A and 8B are removed from the residue separation tanks 7A and 7B as shown in FIG. Can be. In other words, the discharge ports 8b of the submersible pumps 8A, 8B are detachably connected to the residue separation tanks 7A, 7B.
[0041]
As shown in FIG. 6, the separation valves 9A and 9B include a plurality of slits 9a and a valve body 9c that is rotatable in a direction indicated by an arrow about a shaft 9b. The dimension between 9a is larger than the minimum diameter (passing diameter of the submersible pumps 8A, 8B) of the flow path from the suction port 8a in the submersible pumps 8A, 8B to the discharge port 8b in the residue contained in the sewage. The residue is not allowed to pass, but the wastewater itself is set to pass. The valve element 9c closes the discharge port 8b to prevent the inflow of sewage from the residue separation tanks 7A and 7B, but is opened by the sewage flowing out from the discharge port 8b, and the valve body 9c opens the residue separation tank 7A, Permit outflow of sewage to 7B.
[0042]
Next, the loading / unloading mechanisms 13A, 13B of the submersible pumps 8A, 8B will be described. A pair of guide rods 31A and 31B extending in the vertical direction are provided in the manhole 6 for each of the submersible pumps 8A and 8B. The slider 29 is provided with a pair of notches 29b and 29c having an arc shape. Guide rods 31A and 31B are accommodated in these notches 29b and 29c. When the submersible pumps 8A and 8B are lifted, the slider 29 moves along the guide rods 31A and 31B, so that the submersible pumps 8A and 8B rise almost straight toward the opening 6a of the manhole 6. Conversely, when storing the submersible pumps 8A and 8B in the manhole 6 from the ground surface, once the upper ends of the guide rods 31A and 31B are inserted into the notches 29b and 29c, the slider 29 is guided by the guide rods 31A and 31B. Thereby, the submersible pumps 8A and 8B move to the position where the discharge port 8b and the pipe section 28 shown in FIG. 4 are connected.
[0043]
The suction ports 8a of the submersible pumps 8A and 8B are opened facing the bottom of the manhole 6, and a pre-swirling tank 32 is arranged at the bottom of the manhole 6. Referring to FIG. 1, FIG. 2 and FIG. 7, the pre-swirling tank 32 has circular concave portions 32a and 32b in plan view corresponding to the suction ports 8a of the submersible pumps 8A and 8B, and a two-dot chain line in FIG. As shown by the arrows, there are helical curved surfaces 32c and 32d directed to the bottoms of the concave portions 32a and 32b. By providing the pre-swirl tank 32, the sewage swirls near the suction port 8a when the submersible pumps 8A and 8B operate.
[0044]
In the sewage relay pump equipment 1 of the first embodiment having the above-described structure, the sediment separation tanks 7A and 7B, the submersible pumps 8A and 8B, and the separation valves 9A and 9B are accommodated in a manhole 6 that is a sewage storage tank. Therefore, a pit is further provided outside the sewage storage tank, and compared with the conventional solid separation type equipment in which a pump or the like is provided in the pit, the structure is small and the structure is simple.
[0045]
Further, the discharge ports 8b of the submersible pumps 8A, 8B disposed in the manhole 6 are detachably connected to the pipes of the residue separation tanks 7A, 7B, and the separation valves 9A, 9B are attached to the discharge ports 8b. Carry-in / out mechanisms 13A and 13B for carrying out and carrying in the submerged pumps 8A and 8B from the manhole 6 are provided. Therefore, at the time of maintenance or failure, the work can be carried out by carrying out the submersible pumps 8A and 8B from the manhole 6 to the surface of the ground via the opening 6a by the carry-in / out mechanism, and the workability is good.
[0046]
Further, since the submersible pumps 8A and 8B can be carried out of the manhole 6, there is no need to secure a space for the worker to enter the manhole 6 and perform work. Therefore, the installation area of the equipment can be reduced as compared with the conventional solid separation type equipment.
[0047]
Next, with reference to FIG. 8 to FIG. 11, the operation of the wastewater relay pump equipment 1 of the first embodiment will be described. Normally, if one of the pair of submersible pumps 8A, 8B is operating, the other is stopped. The following description focuses on one submersible pump 8A and the corresponding sewage separation tank 7A unless otherwise specified.
[0048]
As shown in FIG. 8, sewage containing residue and earth and sand flows into the inflow tank 16 from the inflow pipe 2, flows from the inflow tank 16 through the branch pipe 17, and flows into the residue separation tank 7A. As shown in FIG. 9, the sewage that has flowed into the sediment separation tank 7A further flows into the suction port 8a of the stopped submersible pump 8A from the pipe 28, and flows into the manhole 6 from the suction port 8a of the submersible pump 8A. I do. When the wastewater passes through the separation valve 9A, the wastewater is separated from the wastewater, so that the wastewater from which the wastewater has been separated is accumulated in the manhole 6. On the other hand, the residue separated by the separation valve 9A accumulates in the residue separation tank 7A. The ball 19 rises as the amount of residue in the residue separation tank 7A increases.
[0049]
When the water level gauges 11 and 12 detect that the inside of the residue separation tank 7A has reached a predetermined water level, the controller 10 starts the submersible pump 8A. As shown in FIG. 11, when the submersible pump 8A is started, the sewage in the manhole 6 is sucked from the suction port 8a and flows into the sewage separation tank 7A from the discharge port 8b via the separation valve 9A. The sewage is further sent from the pumping pipe 21A to the water pipe 3 together with the sewage in the sewage separation tank 7A. Since the connection between the residue separation tank 7A and the inflow tank 16 is blocked by the ball 19, the wastewater does not flow back into the inflow tank 16.
[0050]
The submersible pumps 8A and 8B draw the sewage from which the sediment has been separated by the separation valves 9A and 9B accumulated in the manhole 6 from the suction port 8a, and from the discharge port 8b to the sediment separation tanks 7A and 7B. Since the discharge is performed, it is possible to prevent the submersible pumps 8A and 8B from being blocked by foreign substances.
[0051]
In addition, the pre-swirling tank 32 arranged at the bottom of the manhole 6 rotates the sewage when sucked into the suction port 8a of the submersible pumps 8A and 8B, so that the earth and sand contained in the sewage is reliably sucked into the suction port 8a. . As a result, sediment can be prevented from being deposited on the bottom of the manhole 6, and there is no need to periodically perform an operation of discharging the sediment deposited in the manhole using a vacuum car or the like.
[0052]
Since the opening of the inflow pipe 2 and the opening of the inflow tank 16 are opposed to each other at an interval, a large amount of sewage suddenly flows from the inflow pipe 2 into the residue separation tanks 7A and 7B via the inflow tank 16. Some of the sewage flows into the manhole 6 without passing through the inflow tank 16 and the residue separation tanks 7A and 7B. Therefore, stagnation on the upstream side of the inflow pipe 2 can be prevented. Further, since the screen 18 is attached to the space between the inflow tank 16 and the inflow pipe 2, when a large amount of sewage suddenly flows from the inflow pipe 2 into the residue separation tank 7 as described above, manhole Since the wastewater from which the residue is separated by the screen 18 flows into 6, the submersible pumps 8A and 8B are less likely to be blocked.
[0053]
Further, since the pair of waste separation tanks 7A and 7B are connected to the inflow tank 16 via the common branch pipe 17, a large amount of sewage rapidly flows in from the inflow pipe 2, and one of the waste separation tanks 7A. Even if is full, sewage flows into the other sewage separation tank 7B, so that sewage can be prevented from overflowing from the sewage separation tanks 7A and 7B.
[0054]
(2nd Embodiment)
The sewage relay pump equipment 1 according to the second embodiment of the present invention shown in FIGS. 12 and 13 is different from the first embodiment in that the submersible pumps 8A and 8B and the separation valve are provided separately. A removable partition 37 for dividing the interior of the residue separation tanks 7A, 7B into a portion (first chamber 35) including a connection portion with the submersible pumps 8A, 8B and a remaining portion (second chamber 36). Is provided. As shown in FIG. 13, the partition wall 37 can be vertically attached to and removed from the residue separation tanks 7A and 7B by guide rails 38 having both side edges inserted. Two separation valves 9A and 9B are attached to the partition wall 37. Further, a top plate 39 constituting a part of the outer wall of the residue separation tanks 7A and 7B is attached to the upper end of the partition wall 37. Reference numeral 40 denotes a ring for hanging a hook during lifting or hanging.
[0055]
The residue that has flowed into the residue separation tanks 7A and 7B from the inflow pipe 2 through the inflow tank 16 and the branch pipe 17 flows into the first chamber 35 from the second chamber 36 through the separation valves 9A and 9B, and stops. It flows out into the manhole 6 via the inside submersible pumps 8A and 8B. The sewage separated from the sewage by the separation valves 9A and 9B accumulates in the second chamber 36 of the sewage separation tanks 7A and 7B. When the submersible pump 8 operates, the sewage in the manhole 6 sucked into the submersible pump 8 flows into the second chamber 36 from the first chamber 35 via the separation valves 9A and 9B, and is sent together with the residue to the pumping pipes 21A and 21B. It is sent to the water pipe 3.
[0056]
As shown in FIG. 14, the slider 29 can be moved up and down along the guide rods 31A and 31B to carry out and carry in the submersible pumps 8A and 8B from the manhole 6. Further, as shown in FIG. 15, only the partition wall 37 provided with the separation valves 9A and 9B can be removed from the residue separation tanks 7A and 7B, and can be carried out and carried in from the manhole 6. As described above, since the submersible pumps 8A and 8B and the separation valves 9A and 9B can be separately carried out and carried in from the manhole 6, workability at the time of maintenance and at the time of failure is further improved.
[0057]
Other configurations and operations of the second embodiment are the same as those of the first embodiment, and therefore, the same elements will be denoted by the same reference characters and description thereof will be omitted.
[0058]
Next, the positional relationship between the end of the inflow pipe 2 and the opening of the inflow tank 16 will be described. In the embodiment, as shown in FIG. 16A, the end of the inflow pipe 2 and the opening of the inflow tank 16 are opposed to each other with a space therebetween. However, as shown in FIG. 16B, an upper end wall 16b for closing the upper end of the inflow tank 16 may be provided, and the end of the inflow pipe 2 may be connected to the upper end wall 16b. In this case, in order to make the inside of the inflow tank 16 communicate with the inside of the manhole 6, a vertical slit 16c shown in FIG. 17B, a hole 16d which is, for example, a circular hole shown in FIG. It is preferable to provide a mesh portion 16e shown in (D). As shown in FIG. 16C, the end of the inflow pipe 2 may be inserted from the opening of the inflow tank 16, and the end of the inflow pipe 2 may be arranged in the inflow tank 16. Further, the end of the inflow pipe 2 and the opening of the inflow tank 16 may be arranged at the same height position. In these cases, since the inside of the inflow tank 16 is open similarly to the above-described embodiment (FIG. 16A), a structure in which no slit or hole is provided in the upper part of the inflow tank 16 as shown in FIG. May be.
[0059]
In the above embodiment, the screen 18 covering the space between the end of the inflow pipe 2 and the inflow tank 16 includes a rectangular mesh 18a. However, a screen 18 having a diamond-shaped mesh 18b shown in FIG. 18B or a screen 18 having a hole 18c which is, for example, a circular hole shown in FIG. 18C may be used. In addition, as shown in FIGS. 18D to 18G, the screen 18 may have a short cylindrical shape with both ends opened. The screen 18 in FIG. 18D has a strip-shaped mesh 18d, FIG. 18E has a rectangular mesh 18a, FIG. 18F has a diamond-shaped mesh 18b, and FIG. Shows a screen 18 having a plurality of holes 18c.
[0060]
Instead of the pre-swirling tank 32, for example, structures 32 'having various shapes as shown in FIGS. 19 to 21 can be employed. These structures 32 'have a shape that is inclined toward the suction port 8a of the submersible pumps 8A and 8B that open to face the bottom of the manhole 6, and the sediment contained in the sewage is sucked into the submersible pumps 8A and 8B. It has become. Further, instead of the pre-swirling tank 32 or the structure 32 ', the bottom itself of the manhole 6 is directed toward a shape such that the sewage sucked into the submersible pumps 8A and 8B is swirled, or toward the suction port 8a of the submersible pumps 8A and 8B. The shape may be inclined.
[0061]
【The invention's effect】
As is apparent from the above description, in the sewage relay pump equipment of the present invention, the sediment separation tank, the submersible pump, and the solid-liquid separation valve are accommodated in the sewage storage tank, and the submersible pump is loaded and unloaded from the sewage storage tank. A small and simple structure with a small installation area, good workability at the time of maintenance and at the time of failure, and prevention of blockage of the pump due to impurities can be prevented.
[Brief description of the drawings]
FIG. 1 is a sectional view showing a manhole type sewage relay pump equipment according to a first embodiment of the present invention.
FIG. 2 is a sectional view taken along line II-II in FIG.
FIG. 3 is a plan view of FIG. 1;
FIG. 4 is a partially enlarged view of FIG. 1;
FIG. 5 is a partially enlarged view of FIG. 1 showing a state where a submersible pump is removed from a residue separation tank.
FIG. 6 is a perspective view showing a separation valve.
FIG. 7 is a plan view showing a pre-swirling tank.
FIG. 8 is a schematic cross-sectional view showing a state at the start of inflow of sewage into a sewage separation tank.
FIG. 9 is a schematic cross-sectional view showing a state in which sewage is flowing into a sewage separation tank.
FIG. 10 is a schematic cross-sectional view showing a state in which the waste separation tank is filled with the waste.
FIG. 11 is a schematic cross-sectional view showing a state in which sewage in a manhole is pumped through a residue separation tank by a submersible pump.
FIG. 12 is a partially enlarged sectional view showing a manhole type sewage relay pumping equipment according to a second embodiment of the present invention.
FIG. 13 is a sectional view taken along line XIII-XIII in FIG. 12;
FIG. 14 is a partially enlarged sectional view showing a state where a pump is removed from a residue separation tank.
FIG. 15 is a partially enlarged cross-sectional view showing a state where a separation valve is detached from a residue separation tank.
16 (A), (B), and (C) are partial schematic diagrams each showing an example of a relationship between an end of an inflow pipe and an inflow tank.
17 (A), (B), (C), and (D) are partial schematic diagrams each showing an example of an end of an inflow pipe.
FIGS. 18 (A), (B), (C), (D), (E), (F), and (G) are partial schematic views each showing an example of a screen.
FIG. 19 shows an example of an alternative structure of the pre-swirling tank, where (A) is a plan view and (B) is a cross-sectional view.
FIGS. 20A and 20B show rows of an alternative structure of the pre-swirling tank, wherein FIG. 20A is a plan view and FIG.
FIG. 21 shows an example of an alternative structure of the pre-swirling tank, wherein (A) is a plan view and (B) is a sectional view.
FIG. 22 is a partially enlarged view showing a conventional manhole type sewage relay pumping facility.
FIG. 23 is a sectional view taken along line XXIII-XXIII in FIG. 21;
FIG. 24 is a sectional view showing a conventional solid separation type sewage relay pump equipment.
25 is a sectional view taken along line XXV-XXV in FIG.
[Explanation of symbols]
1 Sewage relay pump equipment
2 Inflow pipe
2a Open end
3 water pipe
5 Manhole cover
6 Manhole
6a opening
7A, 7B residue separation tank
8A, 8B submersible pump
8a Suction port
8b Discharge port
8c flange
9A, 9B separation valve
10 Controller
11 Immersion type water level meter
12 Float type water level gauge
13A, 13B Loading / unloading mechanism
16 Inflow tank
16a opening
16b top wall
16c slit
16d hole
16e mesh part
17 Branch pipe
18 screen
18a Rectangular mesh
18b Diamond-shaped mesh
18c hole
18d strip mesh
19 balls
21A, 21B Pumping pipe
22 ball valve
23 Check valve
24 Air vent valve
26A, 26B Base
28 pipe
28a protrusion
29 Slider
29a protrusion
29b, 29c Notch
31A, 31B Guide rod
32 Pre-rotation tank
32a, 32b recess
32c, 32d curved surface
32 'structure
35 Room 1
36 Room 2
37 Partition
38 Guide rail
39 Top Plate
40 rings

Claims (10)

A sewage relay pumping device that sends sewage flowing from an upstream side through an inflow pipe to downstream through a water pipe,
A sewage storage tank,
A backflow prevention mechanism that is connected to the inflow pipe and the water pipe and that allows inflow of sewage from the inflow pipe but prevents backflow of sewage into the inflow pipe, is disposed in the sewage storage tank. A sediment separation tank,
A discharge port is detachably connected to the waste separation tank, and a suction port is opened into the sewage storage tank to permit backflow of sewage from the discharge port to the suction port when stopped; A submersible pump placed in the tank,
It is interposed between the sewage separation tank and the discharge port of the pump, separates sewage from sewage flowing into the discharge port from the sewage separation tank, and permits the flow of sewage from the discharge port. A solid-liquid separation valve,
And a carry-in / out mechanism for carrying out and bringing the submerged pump in a stopped state from the sewage storage tank. The loading / unloading mechanism,
A vertically extending guide member disposed in the sewage storage tank,
A guided member attached to a discharge port of the submersible pump and movable along the guide member,
The sewage relay pump equipment according to claim 1, further comprising: a positioning mechanism that positions a discharge port of the submersible pump with respect to the residue separation tank. The suction port of the submersible pump opens facing the bottom of the wastewater storage tank,
The sewage relay pump equipment according to claim 1, further comprising a pre-swirl structure for swirling sewage sucked into a suction port of the submersible pump at a bottom portion of the sewage storage tank. The suction port of the submersible pump opens facing the bottom of the wastewater storage tank,
The sewage relay pump equipment according to claim 1, further comprising a structure in which at least a part thereof is inclined at a bottom of the sewage storage tank toward a suction port of the submersible pump. The sewage relay pump equipment according to claim 1, wherein a connection portion between the inflow pipe and the residue separation tank is opened in the sewage storage tank. The sewage relay pump equipment according to claim 5, wherein a gap is provided between an end of the inflow pipe and the residue separation tank, and the screen further covers the gap. The sewage relay pump equipment according to claim 1, wherein the solid-liquid separation valve is fixed to a discharge port of the submersible pump. Further comprising a removable partition for dividing the interior of the residue separation tank into a portion including a connection portion with the submersible pump and a remaining portion,
The sewage relay pump equipment according to claim 1, wherein the solid-liquid separation valve is attached to the partition. In the sewage storage tank, two or more sets each including the residue separation tank, the submersible pump, and the solid-liquid separation valve are accommodated,
The sewage relay pump equipment according to claim 1, wherein the two or more residue separation tanks are connected to each other via a branch pipe, and are connected to the inflow pipe via the branch pipe. The sewage relay pump equipment according to claim 1, wherein the sewage storage tank is a manhole buried underground.

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