JP2013053629A - Pump installation - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pump installation which can enhance the efficiency of cooling electric equipment.SOLUTION: The pump installation includes: a pump P for pumping liquid from a water tank 1; an electric motor M and an internal combustion engine E for driving the pump P; electric equipment 7 including a rotational speed control device 3 for controlling the rotational speed of the electric motor M; a pump chamber 9 for holding the pump P, the electric motor M, the internal combustion engine E, and one part of the electric equipment 7; an electric chamber 8 for storing the other part of the electric equipment 7; a ventilation facility 40 for ventilating the pump chamber 9; and a ventilation facility 10 for ventilating the electric chamber 8.

Description

  The present invention relates to a pump facility provided with a cooling system for cooling electrical equipment.

  FIG. 1 is a schematic diagram showing a conventional pump facility. As shown in FIG. 1, the pump facility generally includes a plurality of pumps P for pumping water in the water tank 1, an electric motor M as a drive source for driving these pumps P, and electrical equipment for supplying electric power to the electric motor M. 100. The electrical equipment 100 is a device including a power distribution device and a control device. More specifically, the power distribution device is a power distribution board, a transformer, or the like, and the control device is a control panel that controls the operation of the motor M, such as start and stop (normal stop, emergency stop in case of failure), A rotational speed control device (inverter device, Serbius device, etc.) for controlling the rotational speed of the electric motor M is used.

  These electrical devices 100 are installed in an electrical room 101. The electrical chamber 101 is provided with a ventilation facility for releasing heat generated from the electrical equipment 100 to the outside of the electrical chamber 101. More specifically, the wall of the electric chamber 101 is provided with a ventilation fan 110 and an exhaust hole (garbage) 111. When the ventilation fan 110 rotates, air is introduced into the electric chamber 101, and at the same time, air is discharged to the outside from the exhaust hole 111.

  This type of pump facility usually includes a plurality of pumps, and the number of pumps to be operated is determined according to the required amount of drainage. Therefore, not all pumps are always operated, and some of them may not be operated. However, ventilation equipment is designed to provide sufficient cooling capacity under conditions where all pumps are in operation. For this reason, it can be said that the ventilation equipment has an excessive cooling capacity with respect to the operation rate of the pump, and as a result, the efficiency of the entire pump facility is lowered.

  In order to solve the above-described problem, there is a method in which a plurality of ventilation fans are provided in the electric chamber 101 and the number of ventilation fans corresponding to the operating electrical equipment 100 is driven. However, as the number of ventilation fans increases, there is a problem that a necessary space as a ventilation facility is increased and initial cost is increased. Furthermore, if the flow rate of air for cooling and the exhaust hole 111 are increased, dust and rainwater are likely to enter the electric chamber 101, and the electrical equipment 100, which is a precision instrument, may break down. In particular, rotational speed control devices such as inverter devices and Serbius devices are vulnerable to dust, and these devices sometimes fail due to dust.

  The present invention has been made in view of the above-described conventional problems, and provides a pump facility that can increase the cooling efficiency of electrical equipment and can prevent adverse effects on the electrical equipment due to dust and rainwater. With the goal.

  In order to achieve the above-described object, one aspect of the present invention includes a pump that pumps liquid in a water tank, an electric motor and an internal combustion engine that drive the pump, and a rotational speed control device that controls the rotational speed of the electric motor. Electrical equipment, the pump, the electric motor, the internal combustion engine, a pump chamber that houses a part of the electrical equipment, an electrical chamber that houses other parts of the electrical equipment, and a ventilation facility that ventilates the pump chamber And a ventilating facility for ventilating the electric room.

  One reference example of the present invention includes a pump that pumps liquid in a water tank, an electric motor that drives the pump, an electrical equipment that includes a rotational speed control device that controls the rotational speed of the electric motor, and a part of the electrical equipment. A pump facility comprising an enclosing unit room and a cooling system for cooling the air in the unit room using the liquid.

In a preferred aspect of the present reference example, the cooling system cools air in the unit room using a liquid pumped up by the pump.
In a preferred aspect of the present reference example, the cooling system includes a heat exchanger that performs heat exchange between the liquid and air in the unit room.
In a preferred aspect of the present reference example, a part of the electrical equipment surrounded by the unit room is the rotational speed control device.

In a preferred embodiment of the present reference example, a fan for stirring air is provided in the unit room.
In a preferred aspect of the present reference example, an openable / closable panel is attached to the unit room.

  Other reference examples of the present invention include a first pump and a second pump for pumping a liquid in a water tank, and a first motor and a second motor for driving the first pump and the second pump, respectively. A first rotation speed control device and a second rotation speed control device for controlling rotation speeds of the first motor and the second motor, respectively, and at least a part of the first rotation speed control device. A surrounding first unit room, a second unit room surrounding at least a part of the second rotational speed control device, and the first unit room using the liquid discharged from the first pump. A first heat exchanger that cools the air in the second unit, and a second heat exchanger that cools the air in the second unit room using the liquid discharged from the second pump. Features Is a pump facilities.

Still another reference example of the present invention includes a pump that pumps liquid in a water tank, an electric motor and an internal combustion engine that drive the pump, an electrical equipment that includes a rotational speed control device that controls the rotational speed of the electric motor, and the pump A pump chamber that houses the electric motor and the internal combustion engine, an electric chamber adjacent to the pump chamber via a partition wall, a ventilation facility that ventilates the pump chamber, and a ventilation facility that ventilates the electric chamber. A part of the electrical equipment is disposed in the pump chamber, and the other part of the electrical equipment is disposed in the electrical chamber.
A preferred aspect of this reference example is that the part of the electrical equipment disposed in the pump chamber and the other part of the electrical equipment disposed in the electrical chamber are separated from each other so as to sandwich the partition wall. It is in contact with the wall.

According to the present invention, the cooling capacity of the ventilation equipment in the pump chamber can be effectively utilized by disposing a part of the electrical equipment that operates when the electric motor is operated and hardly operates when the internal combustion engine is operated. . As a result, the cooling efficiency of the entire pump facility can be increased.
According to this reference example, a part of the electrical equipment is accommodated in the unit room, and the cooling efficiency can be improved by cooling the air in the unit room using the liquid in the water tank. Also, by enclosing a part of the electrical equipment that is vulnerable to dust (for example, the rotation speed control device) in the unit room, the electrical equipment can be protected from dust and rainwater, thereby providing a highly reliable pump facility. be able to.

It is a schematic diagram which shows the conventional pump facility. It is a mimetic diagram showing pump facilities concerning one embodiment of the present invention. It is a schematic diagram which shows the inside of a 1st unit room. Fig.4 (a) is a side view which shows the modification of a 1st unit room, FIG.4 (b) is a perspective view of the 1st unit room shown in Fig.4 (a). It is a schematic diagram which shows the pump facility which concerns on other embodiment of this invention. It is a schematic diagram which shows the pump facility which concerns on other embodiment of this invention. It is a schematic diagram which shows the preferable arrangement | positioning of an electrical equipment.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 2 is a schematic diagram showing a pump facility according to an embodiment of the present invention. As shown in FIG. 2, the pump facility drives a first pump P1 and a second pump P2 that pump up a liquid (for example, water) in the water tank 1, and drives the first and second pumps P1 and P2, respectively. A first rotation speed control device 3A and a second rotation speed control device 3B for controlling the rotation speeds of the first motor M1 and the second motor M2, and the rotation speeds of the first and second motors M1 and M2, respectively. A power distribution device 4 connected to the first and second rotation speed control devices 3A and 3B and an operation control device 5 connected to the power distribution device 4 are provided. The power distribution device 4 is connected to a power source (not shown).

  The first and second rotation speed control devices 3A and 3B are devices such as an inverter device and a Serbius device. The power distribution device 4 is a device including a power distribution board, a transformer, and the like. The operation control device 5 is a control panel that controls operations such as start and stop (normal stop, emergency stop at the time of failure, etc.) of the first and second electric motors M1 and M2. The first rotation speed control device 3A, the second rotation speed control device 3B, the power distribution device 4, and the operation control device 5 are electrical equipment 7 that supplies power to the first electric motor M1 and the second electric motor M2. Configure.

  The electrical equipment 7 is installed in the electrical room 8. Pumps P 1 and P 2 and electric motors M 1 and M 2 are installed outside the electric chamber 8. The electrical room 8 is provided with a ventilation facility 10 for releasing heat generated from the electrical equipment 7 to the outside of the electrical room 8. More specifically, a ventilation fan (intake fan) 11 and an exhaust hole (garbage) 12 are provided on the wall of the electric chamber 8. When the ventilation fan 11 rotates, air is introduced into the electric chamber 8 and at the same time, air is discharged from the exhaust hole 12 to the outside. The sizes of the ventilation fan 11 and the exhaust hole 12 are smaller than those of the ventilation fan 110 and the exhaust hole 111 provided in the conventional pump facility shown in FIG.

  The first rotation speed control device 3A is surrounded by the first unit room 16A, and similarly, the second rotation speed control device 3B is surrounded by the second unit room 16B. These unit rooms 16A and 16B are structures that form a sealed space therein. The unit rooms 16A and 16B are both disposed in the electric room 8. Only a part of the first rotation speed control device 3A may be surrounded by the first unit room 16A, and only a part of the second rotation speed control device 3B may be surrounded by the second unit room 16B.

  The first and second pumps P <b> 1 and P <b> 2 are vertical shaft pumps or horizontal shaft pumps, and are installed above the water tank 1. The suction ports of the pumps P1 and P2 are located in the water tank 1. The first and second electric motors M1 and M2 are connected to the first and second pumps P1 and P2, respectively. Discharge pipes 21A and 21B having discharge valves 20A and 20B are connected to the discharge ports of the first and second pumps P1 and P2, respectively. The first pipe cooler 24A is attached to the discharge pipe 21A connected to the first pump P1, and the second pipe cooler 24B is attached to the discharge pipe 21B connected to the second pump P2. Yes. These first and second in-pipe coolers 24A and 24B are heat exchangers. Circulating pipes 25A and 25B through which a circulating fluid (for example, water) flows are connected to the first and second in-pipe coolers 24A and 24B, respectively. In the first in-pipe cooler 24A, heat exchange is performed between the liquid flowing in the discharge pipe 21A and the circulating liquid in the circulation pipe 25A. Similarly, in the second in-pipe cooler 24B, the liquid flowing in the discharge pipe 21B Heat exchange is performed with the circulating fluid flowing through the circulation pipe 25B. As the first and second in-pipe coolers 24A and 24B, in-pipe coolers disclosed in Japanese Utility Model Publication No. 7-29406 can be used.

  A first heat exchanger 30A and a second heat exchanger 30B are arranged in the first and second unit rooms 16A and 16B, respectively. The first heat exchanger 30A and the first in-pipe cooler 24A are connected by the above-described circulation pipe 25A, and the circulating liquid (usually circulating water) is used as the first in-pipe cooler 24A and the first heat exchanger. It circulates between 30A. Similarly, the second heat exchanger 30B and the second in-pipe cooler 24B are connected by the above-described circulation pipe 25B, and the circulating liquid (usually circulating water) is connected to the second in-pipe cooler 24B and the second in-pipe cooler 24B. It circulates between the heat exchangers 30B.

  The first heat exchanger 30A performs heat exchange between the circulating liquid cooled by the liquid discharged from the first pump P1 and the air in the first unit room 16A, and the second heat exchanger 30B performs heat exchange between the circulating fluid cooled by the liquid discharged from the second pump P2 and the air in the second unit room 16B. As described above, the first heat exchanger 30A and the second heat exchanger 30B are heated between the liquid in the water tank 1 and the air in the unit rooms 16A and 16B via the circulating liquid (that is, indirectly). Exchange. According to such a configuration, the first rotation speed control device 3A and the second rotation speed control device 3B arranged in the first and second unit rooms 16A and 16B are the first and second rotation speed control devices 3B. Cooled by the liquid from the water tank 1 through the air in the unit rooms 16A and 16B.

  FIG. 3 is a schematic diagram showing the inside of the first unit room 16A. 3 shows the internal structure of the first unit room 16A, the second unit room 16B has the same internal structure. As shown in FIG. 3, a fan 31 for stirring the internal air is provided in the unit room 16A. More specifically, the fan 31 is disposed in the vicinity of the heat exchanger 30A and circulates the air cooled by the heat exchanger 30A in the unit room 16A. The rotational speed control device 3A is composed of a plurality of divided cells, and the cooled air passes between the cells while contacting the cells.

  The first and second rotation speed control devices 3A and 3B are cooled by the liquid pumped up by the first and second pumps P1 and P2, respectively. In other words, the first and second rotation speed control devices 3A and 3B are cooled in conjunction with the operation of the first and second pumps P1 and P2, respectively. For example, when the second pump P2 is not operated, the corresponding second heat exchanger 30B does not exhibit a cooling effect, and the second rotation speed control device 3B is not cooled. However, when the second pump P2 is stopped, the corresponding second rotation speed control device 3B does not generate heat, and therefore it is not necessary to cool the second rotation speed control device 3B. Further, when the rotational speeds of the first and second pumps P1, P2 are low, the cooling capacity of the first and second in-pipe coolers 24A, 24B is lowered, but the required power of the electric motors M1, M2 is also reduced ( The required power of the motor decreases at a rate of the cube of the rotational speed). As a result, the heat generation amount of the rotation speed control devices 3A and 3B is also reduced, so that the necessary cooling capacity is maintained.

  As described above, according to the cooling system of the present embodiment, the heat generation amount of the rotation speed control devices 3A and 3B changes according to the operation state of the pumps P1 and P2, and the cooling of the in-pipe coolers 24A and 24B follows this. Since the capacity also changes, it is possible to provide a pump facility with a good cooling efficiency and a balanced cooling. Moreover, since the electrical equipment 7 is cooled using the cooling capacity of the liquid pumped up by the pumps P1 and P2, which has not been used until now, the ventilation provided in the electrical room 8 is compared with the conventional pump facility. The size of the fan 11 and the exhaust hole 12 can be reduced, and the equipment cost can be reduced. Moreover, since the opening area of the ventilation facility 10 becomes small, it is possible to prevent dust and rainwater from entering the electrical chamber 8. Furthermore, the required power of the ventilation fan 11 can also be reduced. In addition, the unit rooms (partitions) 16A and 16B can protect the rotational speed control devices 3A and 3B from dust, and can keep the air in the unit rooms 16A and 16B clean. With such a configuration, the intrusion of dust into the rotation speed control devices 3A and 3B can be prevented in multiple ways, and the failure of the rotation speed control devices 3A and 3B caused by dust can be almost certainly prevented, and the reliability It can be a high pump facility. Specific examples of the rotational speed control devices 3A and 3B include an inverter device and a Serbius device.

  A part of the liquid pumped up by the first and second pumps P1 and P2 may be led directly to the first and second heat exchangers 30A and 30B through conduits (not shown). Even in this case, the first and second rotation speed control devices 3A and 3B can be cooled by the liquid via the air in the unit rooms 16A and 16B. Although the above-described embodiment is a pump facility including two pumps, the present invention can be applied to a pump facility including one pump or three or more pumps. In any case, a part of the electrical equipment is surrounded by the unit room, and the air in the unit room can be cooled using the liquid discharged from the pump. In addition, you may arrange | position the power distribution apparatus 4 comprised from a transformer etc. in a unit room.

  Next, modified examples of the first and second unit rooms 16A and 16B will be described. Since the first unit room 16A and the second unit room 16B have the same configuration, the first unit room 16A will be described below. FIG. 4A is a side view showing a modification of the first unit room 16A, and FIG. 4B is a perspective view of the first unit room 16A shown in FIG. As shown in FIGS. 4A and 4B, a panel 33 is attached to the unit room 16A adjacent to the rotational speed control device 3A. The panel 33 constitutes a part of the wall of the unit room 16A and has a foldable structure. The panel 33 functions as a door, and the operator can access the rotation speed control device 3A by opening the panel 33. The operator can manage the rotational speed control device 3A through the panel 33 and can carry in and out the rotational speed control device 3A.

FIG. 5 is a schematic view showing a pump facility according to another embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the element same as the above-mentioned embodiment, and the duplicate description is abbreviate | omitted.
As shown in FIG. 5, a first auxiliary pump aP <b> 1 and a second auxiliary pump aP <b> 2 are arranged in the water tank 1. In the present embodiment, the first and second pumps P1 and P2 are not pumped to the first pump P1 and the second pump P2, but the first and second pumps aP1 and aP2 are used to pump the first and second pumps P1 and P2. Air in the second unit rooms 16A and 16B is cooled.

  The first and second auxiliary pumps aP1 and aP2 are provided to transfer the liquid in the water tank 1 to the first electric motor M1 and the second electric motor M2 to cool the electric motors M1 and M2. That is, when the rotational speeds of the motors M1 and M2 that are operated at a variable speed by the rotational speed control devices 3A and 3B are low, a cooling fan (not shown) that rotates integrally with the rotating shafts provides a sufficient cooling effect. I can't. Therefore, the liquid in the water tank 1 is supplied to the first and second electric motors M1 and M2 by the first auxiliary pump aP1 and the second auxiliary pump aP2, and the first and second electric motors M1 and M2 are cooled by the liquid. To do.

  Part of the liquid pumped up by the first auxiliary pump aP1 and the second auxiliary pump aP2 is transferred to the above-described first heat exchanger 30A and second heat exchanger 30B through the circulation pipes 35A and 35B. It is like that. The first heat exchanger 30A exchanges heat between the liquid from the water tank 1 and the air in the first unit room 16A, and the second heat exchanger 30B Heat exchange with the air in the unit room 16B. In this example, the liquid in the water tank 1 is used to cool the air in the motors M1 and M2 and the unit rooms 16A and 16B, but the liquid in the water tank provided separately from the water tank 1 and other liquids. A liquid from a supply source may be used.

FIG. 6 is a schematic view showing a pump facility according to another embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the element same as the above-mentioned embodiment, and the duplicate description is abbreviate | omitted.
In the embodiment shown in FIG. 6, one pump P is provided, and an electric motor M and an internal combustion engine E are used as a drive source for the pump P. Specific examples of the internal combustion engine E include a reciprocating engine and a gas turbine engine. A discharge pipe 21 having a discharge valve 20 is connected to the pump P as in the above-described embodiment.

  The pump P, the electric motor M, and the internal combustion engine E are accommodated in the pump chamber 9. The pump chamber 9 and the electric chamber 8 are adjacent to each other and are separated from each other by a partition wall 37. A part of the electrical equipment 7 (that is, the rotational speed control device 3, the power distribution device 4, and the operation control device 5) that supplies power to the motor M is disposed in the pump chamber 9, and the other part is an electric chamber. 8 is disposed within. In the example shown in FIG. 6, the rotation speed control device 3 that controls the rotation speed of the electric motor M is arranged in the pump chamber 9. However, even if the power distribution device 4 composed of a transformer or the like is arranged in the pump chamber 9. Good.

  As shown in FIG. 6, a ventilation facility 40 having a ventilation fan (exhaust fan) 41 and an air intake hole 42 is provided on the wall of the pump chamber 9. When the ventilation fan 41 rotates, the air in the pump chamber 9 is discharged to the outside, and at the same time, the air flows into the pump chamber 9 from the air intake hole 42. During operation of the internal combustion engine E, air is required as an oxygen source for burning the fuel, and the internal combustion engine E becomes hot due to combustion. For this reason, the ventilation facility 40 (ventilation fan 41 and air intake hole 42) provided in the pump chamber 9 is larger than the ventilation facility 10 provided in the electrical chamber 8. The ventilation fan 41 provided in the pump chamber 9 may be an intake fan.

  In the present embodiment, either the internal combustion engine E or the electric motor M is selected as a drive source for the pump M depending on the purpose of liquid feeding. For example, the motor M is used when performing regular pumping for the purpose of river purification, and the internal combustion engine E is used when performing emergency river drainage such as flooding countermeasures (flood control) during rainfall. When the internal combustion engine E and the electric motor M are provided as drive sources as in the present embodiment, the cooling capacity (ventilation capacity) of the ventilation equipment 40 in the pump chamber 9 is an internal combustion engine E that generates a large amount of heat and requires combustion air. Depends on. For this reason, it can be said that the ventilation facility 40 of the pump chamber 9 has an excessive cooling capacity for the electric motor M. Therefore, by disposing a part of the electrical equipment 7 that operates when the electric motor M is operated and hardly operates when the internal combustion engine E is operated in the pump chamber 9, the cooling capacity of the ventilation facility 40 of the pump chamber 9 is effectively used. be able to. As a result, the cooling efficiency of the entire pump facility can be increased.

  As shown in FIG. 6, when the rotational speed control device 3 is disposed in the pump chamber 9, a part of the pump chamber 9 is placed so that dust in the pump chamber 9 does not enter the rotational speed control device 3. It is preferable to partition with the dust filter 45 and arrange the rotational speed control device 3 in the partitioned space. Further, it is preferable that a part of the electrical equipment 7 disposed in the pump chamber 9 and the other part of the electrical equipment 7 disposed in the electrical chamber 8 are in contact with the partition wall 37. More specifically, a part of the electrical equipment 7 disposed in the pump chamber 9 and the other part of the electrical equipment 7 disposed in the electrical chamber 8 are disposed so as to sandwich the partition wall 37. It is preferable. For example, as shown in FIG. 7, the rotation speed control device 3 arranged in the pump chamber 9 and the power distribution device 4 arranged in the electric chamber 8 are arranged so as to sandwich the partition wall 37. It is preferable. With such an arrangement, wiring between the electric chamber 8 and the pump chamber 9 can be simplified.

  The present embodiment can also be applied to a case where a plurality of pumps connected to different drive sources are installed in the pump chamber 9. For example, a first pump connected to the internal combustion engine and a second pump connected to the electric motor may be installed in the pump chamber 9. Also in this case, the first pump and the second pump are selectively operated according to the purpose of liquid feeding.

  The embodiment described above is described for the purpose of enabling the person having ordinary knowledge in the technical field to which the present invention belongs to implement the present invention. Various modifications of the above embodiment can be naturally made by those skilled in the art, and the technical idea of the present invention can be applied to other embodiments. Therefore, the present invention should not be limited to the described embodiments, but should be the widest scope according to the technical idea defined by the claims.

DESCRIPTION OF SYMBOLS 1 Water tank 3, 3A, 3B Rotational speed control apparatus 4 Power distribution apparatus 5 Operation control apparatus 7 Electrical equipment 8 Electric room 9 Pump room 10 Ventilation equipment 11 Ventilation fan 12 Exhaust hole 16A, 16B Unit room 20, 20A, 20B Discharge valve 21, 21A, 21B Exhaust pipes 24A, 24B In-tube coolers 25A, 25B Circulation pipes 30A, 30B Heat exchanger 31 Fan 33 Panels 35A, 35B Circulation pipe 37 Partition wall 40 Ventilation equipment 41 Ventilation fan 42 Air intake hole 45 Dust filter

Claims (1)

A pump for pumping the liquid in the tank,
An electric motor and an internal combustion engine for driving the pump;
Electrical equipment including a rotational speed control device for controlling the rotational speed of the electric motor;
A pump chamber for housing a part of the pump, the electric motor, the internal combustion engine, and the electrical equipment;
An electrical room for housing other parts of the electrical equipment;
Ventilation equipment for ventilating the pump room;
A pumping facility comprising a ventilation facility for ventilating the electric room.

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