JP2022155926A - Drainage pump station - Google Patents

Abstract

To provide a drainage pump station in which multiple pump facilities are disposed in a limited space of the drainage pump station and which achieves space saving of an installation area when a horizontal shaft pump is adopted as a drainage pump.SOLUTION: A drainage pump station includes multiple pump facilities. Each pump facility includes: a pump unit having a horizontal shaft pump and a prime mover; a suction pipe connected at one end to a suction port of the horizontal shaft pump; and a discharge pipe connected at one end to the discharge port of the horizontal shaft pump. The pump unit is installed at a position higher than the suction pipe so as to overlap with at least a part of the suction pipe in a plan view.SELECTED DRAWING: Figure 1

Description

The present invention relates to a drainage pump station.

In recent years, due to climate change, the amount of rainfall has increased compared to before, exceeding the drainage capacity of drainage pumping stations installed for the purpose of draining rainwater, resulting in flooding of rivers and flooding of cities. is increasing. In order to reinforce the drainage capacity, it is necessary to install a drainage pump facility that is larger than the existing pump facility. time is needed. In addition, when large-scale pump equipment is installed, there is a problem from the viewpoint of risk dispersion because the drainage capacity drops significantly during maintenance or failure of the pump equipment. In order to solve these problems, it is conceivable to use small pumps that can be designed and manufactured more standardly than the existing pumps, and increase the number of installed pumps to increase the drainage capacity and disperse the danger. However, when arranging a lot of drainage pump equipment in the installation space of the existing drainage pumping station, there arises a problem of how to arrange it in a limited space.

In particular, horizontal shaft pumps require a larger installation area than vertical shaft pumps and submersible pumps. Therefore, when a horizontal shaft pump is used as a drainage pump in a drainage pumping station, space saving is an issue for arranging it in a limited space. In addition, as the number of pumps increases, the number of suction pipes and discharge pipes increases, so not only the layout of the main equipment such as the pumps and the drive unit, but also the layout of the pipes becomes an issue.

Patent Document 1 proposes a vertical shaft pump device in which a lower pump and an upper pump are connected to a common rotary shaft extending in the vertical direction in order to use a high head and a low head according to the water level of the water suction tank. It is

JP-A-5-172082

The present invention has been made in consideration of the above points. SUMMARY OF THE INVENTION An object of the present invention is to provide a drainage pump station in which a plurality of pump facilities are arranged in a limited space of the pump station, and in which a horizontal shaft pump is adopted as a drainage pump, the installation area can be reduced. It is in.

The drainage pump station according to the first aspect of the present invention includes:
A pumping station with a plurality of pumping stations,
Each pump equipment
a horizontal pump;
a suction pipe having one end connected to the suction port of the horizontal shaft pump;
a discharge pipe having one end connected to the discharge port of the horizontal shaft pump;
has
The horizontal shaft pump is installed at a height position higher than the suction pipe so as to overlap at least a portion of the suction pipe in plan view.

According to this aspect, when the horizontal shaft pump is employed as the drainage pump, the horizontal shaft pump is installed at a height position higher than the suction pipe so as to overlap at least a portion of the suction pipe in plan view. Therefore, the pump installation area can be reduced by the amount of overlap.

A drainage pumping station according to a second aspect of the present invention is the drainage pumping station according to the first aspect,
The horizontal shaft pump is installed on a frame arranged on the same floor as the suction pipe, or installed on a floor above the suction pipe.

A drainage pumping station according to a third aspect of the present invention is the drainage pumping station according to the first or second aspect,
The other end of the suction pipe of each pumping facility is connected to a common suction collecting pipe for the plurality of pumping facilities.

According to this aspect, even if the number of pumps increases, it is only necessary to install one suction pipe route per pump between the pump and the suction collecting pipe. Since there is no need to increase the installation area of the suction pipe, the installation area of the suction pipe can be saved compared to the case where one route of the suction pipe is installed between the pump and the suction water tank without using the suction collecting pipe.

A drainage pumping station according to a fourth aspect of the present invention is the drainage pumping station according to any one of the first to third aspects,
The other end of the discharge pipe of each pump equipment is connected to a common discharge collection pipe for the plurality of pump equipment.

According to this aspect, even if the number of pumps increases, it suffices to install one route for each pump between the pump and the discharge collecting pipe, and the piping between the discharge collecting pipe and the discharge water tank. Since there is no need to increase the number of discharge pipes, the installation area of the discharge pipes can be saved compared to the case where one route of discharge pipes is installed between the pump and the discharge water tank without using the discharge collecting pipe.

A drainage pumping station according to a fifth aspect of the present invention is the drainage pumping station according to any one of the first to fourth aspects,
Of the plurality of pump facilities, the horizontal shaft pumps of two laterally adjacent pump facilities are arranged at different height positions.

According to this aspect, it is possible to prevent interference of planar installation areas between the two laterally adjacent horizontal shaft pumps, and the two laterally adjacent horizontal shaft pumps are close to each other in a plan view. The pump installation area can be saved because it can be arranged as

A drainage pumping station according to a sixth aspect of the present invention is the drainage pumping station according to the fifth aspect,
Of the plurality of pump facilities, two laterally adjacent pump facilities are arranged such that at least a portion thereof overlaps each other in a plan view.

According to this aspect, the pump installation area can be further reduced by the amount of overlap.

A drainage pumping station according to a seventh aspect of the present invention is the drainage pumping station according to the first or second aspect,
The other end of the suction pipe of each pump equipment is connected to a common suction collection pipe for the plurality of pump equipment,
The horizontal shaft pumps of the plurality of pump facilities are arranged at different height positions,
The intake port of the horizontal shaft pump of each pumping station is connected to a vacuum pump common to the plurality of pumping stations.

According to this aspect, the common vacuum pump is operated, and among the horizontal shaft pumps of the plurality of pumping facilities, the pump installed at the highest level is completely filled with water, and the remaining pumps are placed on standby when the pumps are filled with water. This makes it possible to shorten the filling time compared to the case where a plurality of pumps are filled with water by operating separate vacuum pumps one by one. In addition, when a common vacuum pump is operated and a plurality of pumps are fully filled, the starting order of each pump can be freely selected, which is convenient.

Advantageous Effects of Invention According to the present invention, in a drainage pump station where a plurality of pump facilities are arranged in a limited space of the drainage pump station, the installation area can be reduced when a horizontal shaft pump is employed as the drainage pump.

FIG. 1 is a side view showing a schematic configuration of a pump room of a drainage pump station according to the first embodiment. FIG. 2 is a plan view showing a schematic configuration of a pump room of the drainage pump station according to the first embodiment. FIG. 3 is a plan view showing a schematic configuration of a pump room of a drainage pump station according to the second embodiment. FIG. 4 is a plan view showing a schematic configuration of a pump room of a drainage pump station according to the third embodiment. FIG. 5 is a side view showing a schematic configuration of a pump room of a drainage pump station according to the fourth embodiment. FIG. 6 is a plan view showing a schematic configuration of a pump room of a drainage pump station according to the fourth embodiment. FIG. 7 is a side view showing a schematic configuration of a pump room of a drainage pump station according to a first modified example of the fourth embodiment. FIG. 8 is a side view showing a schematic configuration of a pump room of a drainage pump station according to a second modification of the fourth embodiment. FIG. 9A is a flow chart showing an example of a method for starting the drainage pump station according to the first embodiment. FIG. 9B is a flow chart showing an example of a method for stopping the drainage pump station according to the first embodiment. FIG. 10A is a flow chart showing an example of a method for starting the drainage pump station according to the first and fourth embodiments. FIG. 10B is a flow chart showing an example of a method for stopping the drainage pump station according to the first and fourth embodiments. FIG. 11A is a flow chart showing an example of a method for starting the first operating machine of the drainage pumping station according to the third embodiment. FIG. 11B is a flowchart showing an example of a method for starting the second operating machine of the drainage pumping station according to the third embodiment. FIG. 11C is a flow chart showing an example of a method for stopping the drainage pump station according to the third embodiment.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In addition, in the following description and the drawings used in the following description, the same reference numerals are used for parts that can be configured in the same manner, and redundant description is omitted.

(First embodiment)
FIG. 1 is a side view showing a schematic configuration of a pump room of a drainage pump station 10 according to the first embodiment, and FIG. 2 is a plan view of the same. A drainage pump station 10 according to the present embodiment is a drainage station in which a plurality of pump facilities 20 are arranged in a limited installation space in a pump room.

The drainage pump station 10 according to this embodiment has a plurality of pump facilities 20 . The pump equipment 20 is a small-sized pump equipment that can be arranged in a plurality in a limited installation space in the pump room. 1 and 2 show an enlarged representation of one of the plurality of pumping installations 20 arranged in the pumping chamber.

As shown in FIGS. 1 and 2, the pump equipment 20 includes a horizontal shaft pump 21, a suction pipe 25 connected at one end to a suction port 21a of the horizontal shaft pump 21, and a discharge port 21b of the horizontal shaft pump 21 at one end. and a discharge pipe 26 to which is connected.

In the illustrated example, the horizontal shaft pump 21 is installed on the floor 11 of the pump chamber via a frame 24, which will be described later. The horizontal shaft pump 21 may be a smaller pump than a large pump having a diameter exceeding 1000 mm in an existing pumping station. The horizontal shaft pump 21 may have a bore diameter of 900 mm or less, 800 mm or less, or 700 mm or less. In the illustrated example, the horizontal shaft pump 21 is a mixed flow pump, but is not limited to this, and may be an axial flow pump or a centrifugal pump.

As shown in FIGS. 1 and 2 , a prime mover 22 is connected to a main shaft (rotating shaft) of a horizontal shaft pump 21 via a speed reducer 23 . For example, an engine is used as prime mover 22 . As a variant, prime mover 22 may be an electric motor. The prime mover 22 and the speed reducer 23 may be mounted on the floor 11 of the pump chamber via a frame 24, which will be described later, in the same manner as the horizontal shaft pump 21.

As shown in FIG. 1, the casing of the horizontal shaft pump 21 is formed with a suction port 21a, a discharge port 21b, and an intake port (not shown). One end of the suction pipe 25 is liquid-tightly connected to the suction port 21a of the horizontal shaft pump 21, and the other end is positioned in a suction water tank (not shown) provided outside the pump chamber. The discharge pipe 26 has a discharge valve 27, one end of the discharge pipe 26 is liquid-tightly connected to the discharge port 21b of the horizontal shaft pump 21, and the other end is a discharge water tank provided outside the pump chamber. (not shown). A vacuum pump 13 is connected to an intake port (not shown) of the horizontal shaft pump 21 via a full water detector 12 . The full water detector 12 includes an intake valve and a vacuum breaking valve (not shown).

In the present embodiment, as shown in FIGS. 1 and 2, the horizontal shaft pump 21 is installed at a height position higher than the suction pipe 25 so as to overlap at least a portion of the suction pipe 25 in plan view. .

In the illustrated example, the horizontal shaft pump 21 is installed together with the prime mover 22 and the reduction gear 23 on a frame 24 arranged on the same floor as the suction pipe 25 . As a modified example, the horizontal shaft pump 21 may be installed on the floor above the suction pipe 25 together with the prime mover 22 and the reduction gear 23 .

Next, with reference to FIGS. 9A and 9B, an example of operation of the drainage pump station 10 having such a configuration will be described.

When the drainage pump station 10 is started, as shown in FIG. 9A, first, the initial conditions are satisfied that the discharge valve 27 is "closed" and the area from the suction pipe 25 to the discharge valve 27 is open to the atmosphere. It is confirmed that there is (step S11). This initial condition is only an example, and when the end of the discharge pipe 26 is submerged in a discharge water tank (not shown) and the suction lift (height from the suction water level to the top of the main pump) is high Alternatively, the discharge valve 27 may be "open".

Next, the water level of the suction water tank (not shown) is higher than the lower opening of the suction pipe 25 (that is, the end of the suction pipe 25 opposite to the side of the horizontal shaft pump 21 is submerged in the suction water tank). Cage) and the operating water level is confirmed by a sensor (not shown) (step S12).

Then, the vacuum pump 13 is operated (step S13). The operation of the vacuum pump 13 reduces the pressure in the casing of the horizontal pump 21 , so that the water in the suction tank is sucked up through the suction pipe 25 and flows into the casing of the horizontal pump 21 .

When the casing of the horizontal shaft pump 21 is full of water, it is detected by the full water detector 12 (step S14), and based on the output signal from the full water detector 12, the vacuum pump 13 is stopped (step S15). This stops the inflow of water from the suction water tank into the casing.

Next, the prime mover 22 is operated according to the water level of the suction water tank (step S16). Rotational power output from the prime mover 22 is transmitted to the main shaft of the horizontal shaft pump 21 via the reduction gear 23, and the impeller fixed to the main shaft of the horizontal shaft pump 21 is rotated in the water inside the casing.

After that, when the discharge valve 27 is opened (step S17), the power received from the impeller of the horizontal shaft pump 21 causes the water in the casing to be discharged through the discharge pipe 26 into a discharge water tank (not shown). At the same time, the water in the suction water tank newly flows into the casing through the suction pipe 25 .

When the drainage pump station 10 is to be stopped, as shown in FIG. 9B, first, a sensor (not shown) confirms that the water level of the suction water tank is lower than a predetermined height (step S21). .

Next, the discharge valve 27 is closed (step S22), and the motor 22 is stopped (step S23). As a result, the water discharge from the suction water tank to the discharge water tank is stopped.

After that, the vacuum breaker valve of the full water detector 12 is "opened", thereby opening the suction pipe 25 to the discharge valve 27 to the atmosphere (step S24).

According to the present embodiment as described above, when the horizontal shaft pump 21 is employed as the drainage pump, the suction pipe 25 is arranged so that the horizontal shaft pump 21 overlaps at least a portion of the suction pipe 25 in plan view. Since it is installed at a higher height position, the pump installation area in the pump chamber can be reduced by the amount of overlap.

(Second embodiment)
Next, a second embodiment will be described. FIG. 3 is a plan view showing a schematic configuration of the pump room of the drainage pump station 10 according to the second embodiment. 3, illustration of the discharge pipe 26 is omitted.

The drainage pump station 10 according to this embodiment has a plurality of pump facilities. The pump facility is a small-sized pump facility that can be installed in a limited installation space in the pump room. FIG. 3 shows an enlarged representation of three pump facilities 20a to 20c out of the plurality of pump facilities arranged in the pump chamber.

As shown in FIG. 3, each pump equipment 20a to 20c includes a horizontal shaft pump 21, a suction pipe 25 connected at one end to a suction port 21a of the horizontal shaft pump 21, and a discharge port 21b of the horizontal shaft pump 21 at one end. and a discharge pipe 26 to which is connected.

Among them, the configurations of the horizontal shaft pump 21 and the discharge pipe 26 are the same as those of the first embodiment, and the description thereof is omitted.

In the present embodiment, as shown in FIG. 3, the end of the suction pipe 25 on the side opposite to the horizontal shaft pump 21 side is connected to the suction collecting pipe 15 common to the plurality of pump facilities 20a to 20c in the pump chamber. liquid-tight connection. An end portion of the suction collecting pipe 15 opposite to the suction pipe 25 side is positioned in a suction water tank (not shown) provided outside the pump chamber.

Next, an example of the operation of the drainage pump station 10 according to the second embodiment will be described with reference to FIGS. 10A and 10B.

When starting the drainage pump station 10, as shown in FIG. 15 to the discharge valve 27 are confirmed to be open to the atmosphere (step S31). This initial condition is only an example, and when the end of the discharge pipe 26 is submerged in a discharge water tank (not shown) and the suction lift (height from the suction water level to the top of the main pump) is high Alternatively, the discharge valve 27 may be "open".

Next, the water level of the suction water tank (not shown) is higher than the lower opening of the suction collecting pipe 15 (that is, the end of the suction collecting pipe 15 opposite to the suction pipe 25 side is submerged in the suction water tank). It is confirmed by a sensor (not shown) that the water level is the operating water level (step S32).

Then, the vacuum pump 13 of the pump equipment desired to be operated (for example, the pump equipment of reference numeral 20a) is operated (step S33). When the vacuum pump 13 operates to reduce the pressure in the casing of the horizontal pump 21, the water in the suction tank is sucked up through the suction collecting pipe 15 and the suction pipe 25 and flows into the casing of the horizontal pump 21. be.

When the casing of the horizontal shaft pump 21 is full of water, it is detected by the full water detector 12 (step S34), and based on the output signal from the full water detector 12, the vacuum pump 13 is stopped (step S35). This stops the inflow of water from the suction water tank into the casing.

Next, the prime mover 22 of the pump equipment to be operated is operated according to the water level of the suction water tank (step S36). Rotational power output from the prime mover 22 is transmitted to the main shaft of the horizontal shaft pump 21 via the reduction gear 23, and the impeller fixed to the main shaft of the horizontal shaft pump 21 is rotated in the water inside the casing.

After that, when the discharge valve 27 of the pump equipment 20a to be operated is opened (step S37), the power received from the impeller of the horizontal shaft pump 21 causes the water in the casing to flow through the discharge pipe 26 into the discharge tank ( ), and the water in the suction water tank is newly introduced into the casing via the suction collecting pipe 15 and the suction pipe 25 .

When the drainage pump station 10 is to be stopped, as shown in FIG. 10B, first, a sensor (not shown) confirms that the water level of the suction water tank is lower than a predetermined height (step S41). .

Next, the discharge valve 27 of the pump equipment 20a to be stopped is closed (step S32), and the prime mover 22 of the pump equipment 20a to be stopped is stopped (step S33). This stops the water discharge from the suction water tank to the discharge water tank by the pump equipment 20a.

After stopping all the pumping facilities 20a to 20c, the vacuum breaker valve of the full water detector 12 is opened, thereby opening the suction collecting pipe 15 to the discharge valve 27 to the atmosphere (step S24).

According to the second embodiment as described above, in addition to obtaining the same effect as the first embodiment, even if the number of pumps increases, the horizontal shaft pump 21 and the suction collecting pipe 15 can be It suffices to install one suction pipe 25 per unit between them, and there is no need to increase the number of pipes between the suction collecting pipe 15 and the suction water tank. The installation area of the suction pipe in the pump chamber can be saved compared to the case where one route of the suction pipe is installed between the pump and the water tank (that is, the first embodiment).

(Third Embodiment)
Next, a third embodiment will be described. FIG. 4 is a plan view showing a schematic configuration of the pump room of the drainage pump station 10 according to the third embodiment. 4, illustration of the suction pipe 25 is omitted.

The drainage pump station 10 according to this embodiment has a plurality of pump facilities. The pump facility is a small-sized pump facility that can be installed in a limited installation space in the pump room. FIG. 4 shows an enlarged representation of three pump facilities 20a to 20c out of the plurality of pump facilities arranged in the pump chamber.

As shown in FIG. 4, each of the pump facilities 20a to 20c includes a horizontal shaft pump 21, a suction pipe 25 connected at one end to a suction port 21a of the horizontal shaft pump 21, and a discharge port 21b of the horizontal shaft pump 21 at one end. and a discharge pipe 26 to which is connected.

Among them, the configurations of the horizontal shaft pump 21 and the suction pipe 25 are the same as those of the first embodiment, and the description thereof is omitted.

In the present embodiment, as shown in FIG. 4, the end of the discharge pipe 26 opposite to the side of the horizontal shaft pump 21 is connected to the discharge collection pipe 16 common to the plurality of pump facilities 20a to 20c in the pump chamber. liquid-tight connection. The end of the discharge collecting pipe 16 opposite to the discharge pipe 26 side is positioned in a discharge water tank (not shown) provided outside the pump chamber.

Next, an example of the operation of the drainage pumping station 10 according to the third embodiment will be described with reference to FIGS. 11A to 11C.

When starting the drainage pump station 10, as shown in FIG. equipment) is "closed", the area from the suction pipe 25 to the discharge valve 27 is open to the atmosphere, and the discharge valves 27 of the other operating machines (pump equipment with reference numerals 20b and 20c) are "closed". It is confirmed that the initial condition that there is is satisfied (step S51).

Next, the water level of the suction water tank (not shown) is higher than the lower opening of the suction pipe 25 of the pump equipment 20a (that is, the end of the suction pipe 25 opposite to the side of the horizontal shaft pump 21 is in the suction water tank). It is confirmed by a sensor (not shown) that it is submerged in water) and that it is at the operating water level (step S52).

Then, in the pump facility 20a, the vacuum pump 13 is operated (step S53). The operation of the vacuum pump 13 reduces the pressure in the casing of the horizontal pump 21 , so that the water in the suction tank is sucked up through the suction pipe 25 and flows into the casing of the horizontal pump 21 .

In the pump equipment 20a, when the casing of the horizontal shaft pump 21 becomes full of water, it is detected by the full water detector 12 (step S54), and based on the output signal from the full water detector 12, the vacuum pump 13 is stopped. (Step S55). This stops the inflow of water from the suction water tank into the casing.

Next, the prime mover 22 of the pump equipment 20a is operated according to the water level of the suction water tank (step S56). Rotational power output from the prime mover 22 is transmitted to the main shaft of the horizontal shaft pump 21 via the reduction gear 23, and the impeller fixed to the main shaft of the horizontal shaft pump 21 is rotated in the water inside the casing.

After that, when the discharge valve 27 of the pump equipment 20a is opened, the power received from the impeller of the horizontal shaft pump 21 causes the water in the casing to flow through the discharge pipe 26 and the discharge collecting pipe 16 into a discharge tank (not shown). ), and the water in the suction water tank is newly introduced into the casing through the suction pipe 25 .

When the second operating machine (for example, the pump equipment 10b) is to be operated, first, the discharge valve 27 of the pump equipment 10b is "closed" as shown in FIG. is open to the atmosphere (step S61).

Next, the water level of the suction water tank (not shown) is higher than the lower opening of the suction pipe 25 of the pump equipment 20b (that is, the end of the suction pipe 25 opposite to the side of the horizontal shaft pump 21 is in the suction water tank). submerged in water) is confirmed (step S62).

Then, in the pump facility 20b, the vacuum pump 13 is operated (step S63). The operation of the vacuum pump 13 reduces the pressure in the casing of the horizontal pump 21 , so that the water in the suction tank is sucked up through the suction pipe 25 and flows into the casing of the horizontal pump 21 .

In the pump equipment 20b, when the casing of the horizontal shaft pump 21 becomes full of water, it is detected by the full water detector 12 (step S64), and based on the output signal from the full water detector 12, the vacuum pump 13 is stopped. (Step S65). This stops the inflow of water from the suction water tank into the casing.

Next, the prime mover 22 of the pump facility 20b is operated according to the water level of the suction water tank (step S66). Rotational power output from the prime mover 22 is transmitted to the main shaft of the horizontal shaft pump 21 via the reduction gear 23, and the impeller fixed to the main shaft of the horizontal shaft pump 21 is rotated in the water inside the casing.

After that, when the discharge valve 27 of the pump equipment 20b is opened, the power received from the impeller of the horizontal shaft pump 21 causes the water in the casing to flow through the discharge pipe 26 and the discharge collection pipe 16 into a discharge tank (not shown). ), and the water in the suction water tank is newly introduced into the casing through the suction pipe 25 .

The procedure for operating the third and subsequent operating elevators is the same as the procedure for operating the second operating elevator, and the description thereof will be omitted.

The procedure for stopping the pump equipment 20a to 20c is common to all machines, and the pump equipment 20 with reference numeral 20a will be described below as a representative.

When stopping the pump equipment 20a, as shown in FIG. 11C, first, a sensor (not shown) confirms that the water level of the suction water tank is lower than a predetermined height (step S71). .

Next, the discharge valve 27 of the pump equipment 20a to be stopped is closed (step S72), and the prime mover 22 of the pump equipment 20a to be stopped is stopped (step S73). This stops the water discharge from the suction water tank to the discharge water tank by the pump equipment 20a.

Next, by opening the vacuum breaker valve of the full water detector 12 of the pump equipment 20a to be stopped, the suction collecting pipe 15 to the discharge valve 27 are opened to the atmosphere (step S74).

According to the third embodiment as described above, in addition to obtaining the same effect as the first embodiment, even if the number of pumps increases, the horizontal shaft pump 21 and the discharge collecting pipe 16 can be It suffices to install one route of the discharge pipe 26 between each unit, and there is no need to increase the number of pipes between the discharge collection pipe 16 and the discharge water tank. The installation area of the discharge pipes in the pump chamber can be saved compared to the case where one route of the discharge pipes is installed between each pump (that is, the first embodiment).

In the third embodiment, as in the second embodiment, the end of the suction pipe 25 on the side opposite to the side of the horizontal shaft pump 21 is common to the plurality of pump facilities 20a to 20c in the pump chamber. may be liquid-tightly connected to the suction collecting pipe 15. According to such an aspect, it is possible to obtain the same effects as those of the second embodiment.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 5 is a side view showing a schematic configuration of the pump room of the drainage pump station 10 according to the fourth embodiment, and FIG. 6 is a plan view of the same. 6, illustration of the discharge pipe 26 is omitted.

The drainage pump station 10 according to this embodiment has a plurality of pump facilities. The pump facility is a small-sized pump facility that can be installed in a limited installation space in the pump room. 5 and 6 show enlarged representatives of three pump facilities 20a to 20c out of the plurality of pump facilities arranged in the pump chamber.

As shown in FIGS. 5 and 6, each pump equipment 20a to 20c includes a horizontal shaft pump 21, a suction pipe 25 having one end connected to a suction port 21a of the horizontal shaft pump 21, and a discharge port of the horizontal shaft pump 21. and a discharge pipe 26, one end of which is connected to 21b.

Among them, the configurations of the horizontal shaft pump 21 and the discharge pipe 26 are the same as those of the first embodiment, and the description thereof is omitted.

Referring to FIG. 5, in the present embodiment, as in the second embodiment, the end of the suction pipe 25 opposite to the side of the horizontal pump 21 is connected to a plurality of pump facilities 20a to 20c in the pump chamber. They are connected in a liquid-tight manner to a common suction manifold 15 . An end portion of the suction collecting pipe 15 opposite to the suction pipe 25 side is positioned in a suction water tank (not shown) provided outside the pump chamber.

In the present embodiment, as shown in FIGS. 5 and 6, the horizontal shaft pumps 21 of two laterally adjacent pump facilities among the plurality of pump facilities 20a to 20c are arranged at different height positions. ing.

As shown in FIGS. 5 and 6, the horizontal shaft pumps 21 of the plurality of pump installations 20a-20c may be arranged at different height positions. Specifically, for example, the second pump equipment 20b arranged next to the first pump equipment 20a in plan view is arranged at a height position higher than the first pump equipment 20a, and the second pump equipment 20b The third pump facility 20c arranged next to the facility 20b may be arranged at a higher height position than the second pump facility 20b.

By arranging the horizontal shaft pumps 21 of the two laterally adjacent pump facilities at different height positions, the planar installation area interference between the two laterally adjacent horizontal shaft pumps 21 is eliminated. Since two laterally adjacent horizontal shaft pumps can be arranged close to each other in plan view, the pump installation area in the pump chamber can be saved.

As shown in FIGS. 5 and 6, two laterally adjacent pump facilities among the plurality of pump facilities 20a to 20c may be arranged such that at least a portion thereof overlaps each other in plan view. In the illustrated example, the horizontal shaft pump 21 of the first pump facility 20a and the prime mover 22 of the second pump facility 20b are arranged so as to overlap each other in a plan view, and the horizontal shaft pump 21 of the second pump facility 20b is arranged so as to overlap each other in plan view. The shaft pump 21 and the prime mover 22 of the third pump equipment 20c are arranged so as to overlap each other in plan view. As a result, the pump installation area in the pump chamber can be further reduced by the amount of overlap.

As a modification, as shown in FIG. 7, two laterally adjacent pump facilities among the plurality of pump facilities 20a to 20c may be arranged so as not to overlap each other in plan view. In this case, since the space above the pump is free, there is an advantage that maintenance of the pump is easy.

In the examples shown in FIGS. 5 and 6 and the example shown in FIG. 7, the horizontal shaft pumps 21 of the plurality of pump facilities 20a to 20c are arranged at different height positions. If the horizontal shaft pumps 21 of the pump equipment are arranged at different height positions, for example, as shown in FIG. The second pumping equipment 20b arranged next to the first pumping equipment 20a is arranged at a height higher than the first pumping equipment 20a, and the third pumping equipment 20c arranged next to the second pumping equipment 20b It may be arranged at the same height position as the first pump facility 20a (that is, at a lower height position than the second pump facility 20b). Even with such an arrangement, it is possible to prevent interference of planar installation areas between the two laterally adjacent horizontal shaft pumps 21, and the two laterally adjacent horizontal shaft pumps can be arranged in plan view. Since they can be arranged close to each other, the pump installation area in the pump chamber can be saved.

In this embodiment, as shown in FIG. 5, the suction ports of the horizontal shaft pumps 21 of the respective pump facilities 20a to 20c are connected to the vacuum pump 13 common to the plurality of pump facilities 20a to 20c.

Next, an example of operation of the drainage pump station 10 according to the fourth embodiment will be described with reference to FIGS. 10A and 10B.

As shown in FIG. 10A, when starting the drainage pump station 10, first, in all the pump facilities 20a to 20c connected to the suction collecting pipe 15, the discharge valves 27 are "closed", and the suction collecting pipe 15 to the discharge valve 27 are confirmed to be open to the atmosphere (step S31). This initial condition is only an example, and when the end of the discharge pipe 26 is submerged in a discharge water tank (not shown) and the suction lift (height from the suction water level to the top of the main pump) is high Alternatively, the discharge valve 27 may be "open".

Next, the water level of the suction water tank (not shown) is higher than the lower opening of the suction collecting pipe 15 (that is, the end of the suction collecting pipe 15 opposite to the suction pipe 25 side is submerged in the suction water tank). It is confirmed by a sensor (not shown) that the water level is the operating water level (step S32).

Then, the vacuum pump 13 common to the plurality of pump facilities 20a to 20c is operated (step S33). In each pump equipment 20a to 20c, the operation of the vacuum pump 13 reduces the pressure in the casing of the horizontal pump 21, thereby sucking up the water in the suction tank through the suction collecting pipe 15 and the suction pipe 25. It flows into the casing of pump 21 .

In the present embodiment, as shown in FIG. 5, the second pump equipment 20b is arranged at a height position higher than the first pump equipment 20a, and the third pump equipment 20c is located above the second pump equipment. 20b, the pumps are filled in order from the bottom, that is, the first pumping equipment 20a, the second pumping equipment 20b, and the third pumping equipment 20c are arranged in this order. The pump is completely filled with water.

When the casing of the horizontal shaft pump 21 of the third pump equipment 20c installed at the top level becomes full of water, the full water detector 12 detects it (step S34), and based on the output signal from the full water detector 12 , the vacuum pump 13 is stopped (step S35). This stops the inflow of water from the suction water tank into the casing.

Next, according to the water level of the suction water tank, the prime mover 22 of the pump equipment desired to be operated (for example, the pump equipment of reference numeral 20a) is operated (step S36). Rotational power output from the prime mover 22 is transmitted to the main shaft of the horizontal shaft pump 21 via the reduction gear 23, and the impeller fixed to the main shaft of the horizontal shaft pump 21 is rotated in the water inside the casing.

After that, when the discharge valve 27 of the pump equipment 20a to be operated is opened (step S37), the power received from the impeller of the horizontal shaft pump 21 causes the water in the casing to flow through the discharge pipe 26 into the discharge tank ( ), and the water in the suction water tank is newly introduced into the casing via the suction collecting pipe 15 and the suction pipe 25 .

The procedure for stopping the drainage pump station 10 is the same as in the second embodiment, and the description is omitted.

According to the fourth embodiment as described above, in addition to obtaining the same effects as those of the first and second embodiments, by completing the filling of the pump facility 20c installed at the top level, The remaining pump facilities 20a and 20b can be put on standby when they are full of water, and the full-water time can be shortened as compared with the case where separate vacuum pumps are operated one by one to fill up a plurality of pump facilities. Further, when the common vacuum pump 13 is operated and the plurality of pump facilities 20a to 20c are fully filled, the starting order of the pump facilities 20a to 20c can be freely selected, which is convenient.

Further, according to the present embodiment, the horizontal shaft pumps 21 of two laterally adjacent pump installations are arranged at different height positions, so that the two laterally adjacent horizontal shaft pumps 21 are arranged at mutually different height positions. , and two laterally adjacent horizontal shaft pumps can be arranged close to each other in plan view, so that the pump installation area in the pump chamber can be reduced.

In the fourth embodiment, as in the third embodiment, the end of the suction pipe 25 on the side opposite to the side of the horizontal shaft pump 21 is common to the plurality of pump facilities 20a to 20c in the pump chamber. may be liquid-tightly connected to the suction collecting pipe 15. According to this aspect, it is possible to obtain the same effects as those of the third embodiment.

Although the embodiments and modifications of the present invention have been described above by way of illustration, the scope of the present invention is not limited to these, and changes and modifications can be made according to the purpose within the scope described in the claims. is possible. In addition, each embodiment and modifications can be appropriately combined within a range in which the contents are not inconsistent.

10 Drainage pump station 11 Pump room floor 12 Full water detector 13 Vacuum pump 15 Suction collection pipe 16 Discharge collection pipe 20, 20a to 20c Pump equipment 21 Horizontal shaft pump 21a Suction port 21b Discharge port 22 Motor 23 Reduction gear 24 Frame 25 Suction pipe 26 discharge pipe 27 discharge valve

Claims (7)

A pumping station with a plurality of pumping stations,
Each pump equipment
a horizontal pump;
a suction pipe having one end connected to the suction port of the horizontal shaft pump;
a discharge pipe having one end connected to the discharge port of the horizontal shaft pump;
has
The drainage pump station, wherein the horizontal shaft pump is installed at a height position higher than the suction pipe so as to overlap at least a part of the suction pipe in plan view. 2. The drainage pumping station according to claim 1, wherein said horizontal shaft pump is installed on a frame arranged on the same floor as said suction pipe, or installed on a floor above said suction pipe. 3. The drainage pumping station according to claim 1, wherein the other end of the suction pipe of each pumping facility is connected to a common suction collecting pipe for the plurality of pumping facilities. 4. The drainage pumping station according to any one of claims 1 to 3, wherein the other end of the discharge pipe of each pump equipment is connected to a common discharge collection pipe for the plurality of pump equipment. The drainage pumping station according to any one of claims 1 to 4, wherein horizontal shaft pumps of two laterally adjacent pumping facilities among the plurality of pumping facilities are arranged at different height positions. 6. The drainage pumping station according to claim 5, wherein two laterally adjacent pump installations among the plurality of pump installations are arranged so that at least a portion thereof overlaps each other in a plan view. The other end of the suction pipe of each pump equipment is connected to a common suction collection pipe for the plurality of pump equipment,
The horizontal shaft pumps of the plurality of pump facilities are arranged at different height positions,
3. The drainage pumping station according to claim 1 or 2, wherein the suction port of the horizontal shaft pump of each pumping station is connected to a vacuum pump common to the plurality of pumping stations.

Images