JP2022156318A - Pump device - Google Patents

Abstract

To try to materialize space saving of pump equipment, and furthermore to increase draining capability thereof.SOLUTION: The pump device is comprised of: a plurality of pump units transferring water from a suction side to a discharge water tank; and a suction collecting pipe connected to the plurality of pump units. Each of the pump units comprises a suction pipe, a pump portion connected to the suction pipe, and a driving source driving the pump portion. The suction collection pipe comprises: a suction portion partially arranged in a suction inflow portion or the suction water tank; and a collection pipe connected to the suction pipes of the plurality of pump units. The pump equipment is installed in a building, and the suction collection pipe is partially arranged in the suction inflow portion or the suction water tank through an opening formed in the building.SELECTED DRAWING: Figure 1

Description

The present invention relates to a pump device for pumping up drainage such as rainwater.

If rainfall exceeds the drainage capacity of the drainage pump station, there is a risk of flooding of rivers and flooding of houses. In recent years, with climate change, rainfall tends to increase, and risks such as flooding are increasing. Therefore, there is a growing need to increase the drainage capacity of existing pumping stations.

In order to increase the drainage capacity, it is conceivable to install a large drainage pump. However, since it is necessary to increase the size of the drain pump while taking into consideration the conditions of use and restrictions on the place of installation, a large manufacturing cost and a long manufacturing period are required. In addition, simply enlarging the size of the drainage pump causes a significant drop in drainage capacity during maintenance or failure of the pump.

On the other hand, it is conceivable to install a large number of drainage pumps in an existing drainage pump station to increase the drainage capacity while dispersing the risk (see, for example, Patent Document 1). When installing a large number of drainage pumps, it is conceivable to suck water from an outdoor suction inlet or from a suction water tank arranged directly under the existing pump room. In the latter case, an additional opening must be made in the existing suction cistern (civil engineering structure) to install the drainage pump, causing a reduction in the strength of the structure. In the former case, when installing a large number of drainage pumps in an existing drainage pump station, the water will be sucked from the outdoor suction inlet, but the current situation is that the installation space is limited at the existing drainage pump station.

JP 2012-127360 A

SUMMARY OF THE INVENTION It is an object of the present invention to provide a pump device capable of increasing the drainage capacity while saving the space of the equipment.

In view of the above, one aspect of the present invention is a pump device comprising a plurality of pump units for transferring water from a suction side to a discharge water tank, and a suction collecting pipe connected to the plurality of pump units, The pump unit includes a suction pipe, a pump section connected to the suction pipe, and a drive source for driving the pump section, and the suction collection pipe is partially arranged in a suction inlet or a suction water tank. A suction part and a collecting pipe connected to the suction pipes of the plurality of pump units are provided.

One aspect of the present invention is a pump system in which a plurality of the pump devices described above are arranged, the first pump device comprising a first number of the pump units and the second pump device comprising a second number of the pump units. 2 pump device. The first number and the second number may be different or the same.

According to the present invention, it is possible to increase the drainage capacity while saving the space of the facility.

It is a top view showing a schematic structure of a pump device concerning an embodiment. 2 is a side view of the pump device of FIG. 1; FIG. 2 is an enlarged view of a pump unit that constitutes the pump device of FIG. 1; FIG. 4 is a flow chart showing an example of a procedure for starting a first pump unit; 7 is a flow chart showing an example of a procedure for starting a second pump unit; 4 is a flow chart showing an example of a procedure for stopping a pump unit; It is a top view which shows schematic structure of the pump apparatus which concerns on another embodiment.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a schematic configuration of a pump device 10 according to this embodiment, and FIG. 2 is a side view of the pump device 10. As shown in FIG. The pump device 10 in this embodiment is installed, for example, in a drainage pumping station, and constitutes a drainage system for draining rainwater that has flowed into the suction inlet from a river or the like into a discharge water tank.

In this embodiment, the pump device 10 includes three pump units 10A to 10C, a vacuum pump 12 commonly connected to these pump units 10A to 10C, and a common connection to suction pipes of these pump units. A suction collecting pipe 14 is provided. The suction collecting pipe 14 passes through an opening (not shown) formed in the building wall 16 and is arranged on the building floor 18 integrally formed with the building wall 16 . The interior of building 18 is the existing suction sump or ground.

The suction collecting pipe 14 has a substantially L-shaped suction portion 14a, one end of which enters the suction inflow portion, and a connecting portion connected to the suction portion 14a and connected to the suction pipes of the pump units 10A to 10C, which will be described later. 14b. The suction portion 14a and the connecting portion 14b may be integrated, or may be configured by combining separate pipes. By adopting a configuration in which a plurality of pump units are connected by suction collecting pipes, there is no need to install a plurality of suction pipes at the suction inflow section, and the pump units can be connected without forming a large number of openings in the building wall 16. can be increased.

In addition, the end of the suction portion 14a on the side of the suction inflow portion is formed into a bell mouth shape, and in order to prevent a vortex (air suction vortex) that may occur in the vicinity of the suction portion 14a, the end of the suction portion 14a is provided with a vortex. An anti-vortex device consisting of an anti-plate and a bell splitter may be installed.

In this specification, the pump units 10A to 10C have the same configuration, so unless otherwise specified, the pump unit 10A will be described below. It should be noted that the configurations with the suffixes a to c of the reference numerals represent configurations that are included in the pump units 10A to 10C, respectively.

In FIG. 3, the pump unit 10A is a horizontal shaft pump, and has a suction pipe 20a, a pump portion 22a, a discharge pipe 24a, and a discharge valve 26a. The suction pipe 20a has one end side (suction inflow portion side) connected to the suction collecting pipe 14, and an opening at the other end side (discharge side) connected to the pump portion 22a. The pump portion 22a has an opening on one end (suction side) connected to the suction pipe 20a, and an opening on the other end (discharge side) connected to the discharge pipe 24a. One end (suction side) of the discharge pipe 24a is connected to the pump portion 22a, and the other end (discharge side) of the discharge pipe 24a is directed to a discharge water tank (not shown). The discharge valve 26a is provided on the discharge pipe 24a.

The pump unit 10A has a prime mover 30a and a speed reducer 32a having an input shaft and an output shaft. The prime mover 30a is connected to the input shaft of a speed reducer 32a, and the output shaft of the speed reducer 32a is connected to a main shaft (not shown) inside the pump section 22a. The speed reducer 32 has a predetermined reduction ratio such that the ratio between the number of revolutions of the input shaft and the number of revolutions of the output shaft is a predetermined value. When the prime mover 30a rotates, rotational force is transmitted to the main shaft in the pump section 22a via the speed reducer 32a, and an impeller (not shown) connected to the main shaft rotates. As a result, water is led from the suction pipe 20a to the discharge pipe 24a via the pump portion 22a.

The pump unit 10A further has an intake valve 36a, a vacuum breaker valve 38a, and a full water detector 40a (in FIG. 3, these members are collectively illustrated for simplification). The pump section 22a is connected to the vacuum pump 12 via an intake valve 36a. By driving the vacuum pump 12 with the intake valve 36a open, the inside of the pump portion 22a is evacuated. The vacuum breaker valve 38a is provided in the suction pipe 20a, the pump portion 22a, or the discharge pipe 24a. When the vacuum breaker valve 38a opens, the vacuum state in the internal space from the suction pipe 20a to the discharge pipe 24a is broken, and the atmospheric pressure is released. Become.

The full water detector 40a detects that the space from the suction pipe 20a to the discharge valve 26a (the space inside the pump unit 10A) is full of water. When the full water level detector 40a detects that the water level is full, the motor 30a rotates the impeller in the pump section 22a, and the discharge valve 26a is opened. Water is thereby pumped up from the suction inlet and transferred to the discharge water tank.

FIG. 4 is a flow chart showing an example of a procedure for starting the pump unit in the pump device having the above configuration. The order in which the plurality of pump units 10A to 10C are started may be fixed or may be changed. In the following description, the pump unit 10A is assumed to be the first operating machine. Further, in the following description, the start and stop control of the pump units 10A to 10C may be configured so as to be automatically performed by a control device (not shown) connected to the pump device, or the operator may operate the control panel ( (not shown)) may be manually operated to start and stop the pump units 10A to 10C.

First, as an initial condition, the discharge valve 26a of the pump unit 10A, which is the first operating machine, is closed. Further, the intake valve 36a is closed and the vacuum breaking valve 38a is opened (step S10). As a result, the space from the suction pipe 20a to the discharge valve 26a is open to the atmosphere. After that, the vacuum breaking valve 38a is closed.

As an initial condition, the discharge valves 26b and 26c of the other pump units 10B and 10C are both closed. Also, as with the first pump unit 10A, the intake valves 36b and 36c of the other pump units 10B and 10C are closed, and the vacuum breaking valves 38b and 38c are opened. After that, the vacuum breaking valves 38b and 38c are closed (step S11).

A water level gauge (not shown) provided in the suction inflow portion detects that the water level in the suction inflow portion is equal to or higher than the lower end of the suction portion 14a of the suction collecting pipe 14 and is equal to or higher than the operating water level (first set value). Then ("Y" in step S12), the intake valve 36a is opened and the vacuum pump 12 is operated (step S13). As a result, the space from the suction pipe 20a to the discharge valve 26a is evacuated.

When the full water detector 40a detects that the space from the suction pipe 20a to the discharge valve 26a is full ("Y" in step S14), the intake valve 36a is closed and the vacuum pump 12 is started. It is stopped (step S15).

Then, the motor 30a is operated to rotate the impeller of the pump portion 22a (step S16), and the discharge valve 26a of the pump unit 10A is opened (step S17). By the above operation, the first pump unit 10A pumps up the water in the suction inlet and drains it toward the discharge water tank.

FIG. 5 is a flow chart showing an example of a procedure for starting the pump unit relating to the second operating machine of the pump device. In the following description, it is assumed that the pump unit 10B is the second operating machine.

As an initial state, the discharge valve 26b of the pump unit 10B, which is the second operating machine, is closed. Further, the intake valve 36b is closed, and the vacuum breaking valve 38b is closed (step S20). The discharge valve 26a of the pump unit 10A associated with the first operating machine is opened. In addition, the discharge valve 26c of the third pump unit 10C is closed. After that, the vacuum breaking valve 38b is closed (step S21).

When it is detected that the water level of the suction inflow section has reached a predetermined value (second set value) or higher ("Y" in step S22), the intake valve 36b is opened and the vacuum pump 12 is operated. (step S23). As a result, the space from the suction pipe 20b to the discharge valve 26b is evacuated. When the full water detector 40b detects that the space from the suction pipe 20b to the discharge valve 26b is full ("Y" in step S24), the intake valve 26b is closed and the vacuum pump 12 is started. It is stopped (step S25). Then, the motor 30b is operated to rotate the impeller of the pump portion 22b (step S26), and the discharge valve 26b of the pump unit 10B is opened (step S27). By the operation described above, the second pump unit 10B pumps up the water in the suction inlet and drains it toward the discharge water tank.

Since the procedure for starting the pump unit relating to the third operating machine is the same as in FIG. 6, the explanation is omitted.

FIG. 6 is a flowchart showing an example of a procedure for stopping the pump unit associated with the first operating machine. When a plurality of pump units 10A to 10C are being driven, the order of stopping them may be fixed or may be changed. In the following description, it is assumed that the pump unit 10A is stopped first.

When it is detected that the water level of the suction inflow portion has fallen below a predetermined value (third set value) while the pump unit is operating ("Y" in step S30), the pump unit 10A in the open state discharges. The valve 26a is closed (step S31). Then, the prime mover 30a is stopped (step S32). As a result, the pump unit 10A stops draining water from the suction inlet to the discharge water tank. Since the procedure for stopping the second and subsequent pump units is the same, the explanation is omitted.

In the above embodiment, the case of pumping up waste water from the suction inlet has been described as an example, but the present invention is not limited to this. For example, as shown in FIG. 7, a suction collecting pipe 14 is inserted through an opening for existing pumps formed in the building floor 18 of the suction water tank, and a plurality of pump units are connected to this suction collecting pipe. Thus, even when draining water from the suction water tank, it is possible to increase the pump equipment while saving space.

In the above embodiment, the pump device composed of three pump units has been described as an example. However, the present invention is not limited to this. can be applied equally to The number of pump units to be used can be appropriately determined in consideration of the amount of rainwater that needs to be treated at the pump station and the processing capacity of each pump unit.

For example, when nine pump units are installed in a drainage pump station, three sets of pump devices each consisting of three pump units may be provided, and these three sets of pump devices may be arranged in the drainage station. In this case, the pump units may be filled with water by the vacuum pump 12 for each set of three pump units. You can do it. By simultaneously filling the three pump units with water, it is possible to shorten the driving time of the pump device, thereby preventing a delay in drainage.

Also, the number of pump units in one set may be the same or different. For example, when constructing a facility with six pump units, a set of three pump units and suction collecting pipes connected to these pump units, two pump units and suction collecting pipes connected to these pump units The pump device may be constructed from a set, one pump unit and a set of suction collecting pipes connected to this pump unit.

Here, when a vacuum pump is commonly connected to the pump device consisting of these multiple sets, the maximum number of pumps constituting the set (the above-mentioned A set of three pump units in the example) determines the suction flow. Therefore, when using a set consisting of less than the maximum number of pump units (a set with one or two pump units), a vacuum pump with a large suction flow rate can be used to shorten the filling time. .

The above-described embodiments are described for the purpose of enabling a person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiments can be made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. The present invention is not limited to the described embodiments, but is to be construed in its broadest scope according to the technical concept defined by the claims.

10 pump devices 10A to 10C pump unit 14 suction collecting pipe 16 building wall 18 building floor 20a to 20c suction pipes 22a to 22c pump parts 26a to 26c discharge valves 30a to 30c prime mover

Claims (4)

A pump device comprising a plurality of pump units for transferring water from a suction side to a discharge water tank, and a suction collecting pipe connected to the plurality of pump units,
The pump unit includes a suction pipe, a pump section connected to the suction pipe, and a drive source for driving the pump section,
The pump, wherein the suction collecting pipe includes a suction part partially arranged in a suction inflow part or a suction water tank, and a collecting pipe connected to the suction pipes of the plurality of pump units. Device. 2. A pump system in which a plurality of pump devices according to claim 1 are arranged, comprising: a first pump device comprising a first number of said pump units; and a second pump device comprising a second number of said pump units. A pump system comprising: 3. The pump system of claim 2, wherein said first number and said second number are different. 3. The pump system of claim 2, wherein said first number and said second number are the same.

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