JP6288679B2 - Pump drainage station cooling equipment - Google Patents

Description

  The present invention relates to a cooling facility for cooling an internal combustion engine that drives a drain pump as a main pump and a power generator in a pump drainage station.

In the pump drainage station, an internal combustion engine such as a diesel engine is installed as a prime mover for operating a drain pump as a main pump, and a cooling facility for cooling the internal combustion engine is provided.
An example of a conventional cooling facility for a pump drainage station will be described with reference to FIG. As shown in FIG. 7, this conventional cooling facility has a suction pump in which a drain pump 2 is arranged on the first floor 1 of a two-bed pump building, and a drain pump body 2a is provided below the first floor 1. It is suspended in the water tank 3.

  A water storage tank 4 for storing the cooling water W is provided adjacent to the suction water tank 3, and a water intake pump 5 is provided in the water storage tank 4. The intake pump 5 includes an electric motor (not shown) and is driven by commercial power or self-generated power. A second floor 6 is provided above the first floor 1, and an internal combustion engine 7 and a speed reducer 8, which are diesel engines for operating the drainage pump 2, are disposed on the second floor 6. Yes. When the internal combustion engine 7 is driven, the rotational power is transmitted to the pump shaft 9 of the drainage pump 2 via the speed reducer 8, and the drainage pump 2 is operated.

  Since the internal combustion engine 7 and the speed reducer 8 generate heat when driven, the internal combustion engine 7 is provided with a cooling water pump 12, and the cooling water W supplied from the intake pump 5 is pressurized to an appropriate pressure by the cooling water pump 12. To the cooling jacket 10 of the internal combustion engine 7. Further, the cooling water W is also supplied from the intake pump 5 to the oil cooler 11 of the speed reducer 8. Since the cooling water pump 12 is driven as the internal combustion engine 7 is driven, a driving power source is not required. The cooling water W that has been heat-exchanged by the internal combustion engine 7 and the speed reducer 8 to become hot water returns to the water storage tank 4 and is used again as the cooling water W.

  Another example of a conventional cooling facility for a pump drainage station will be described with reference to FIG. Cooling water W is pumped from the water storage tank 4 to the expansion tank 15 disposed at a position higher than the internal combustion engine 7 by the intake pump 5 and decelerated from the cooling jacket 10 of the internal combustion engine 7 via the cooling water pump 12. Cooling water W is supplied to the oil cooler 11 of the machine 8. The cooling water W that has been heat-exchanged by the internal combustion engine 7 and the speed reducer 8 to become hot water is cooled by the in-pipe cooler 16 connected in series to the discharge pipe of the drain pump 2, returned to the expansion tank 15, and again as the cooling water W. used.

  As described above, in the conventional cooling facility for the pump drainage station, the internal combustion engine 7 is disposed at a position higher than the water storage tank 4 and the height difference between the internal combustion engine 7 and the water storage tank 4 is large. The cooled water pump 12 cannot suck the cooling water W directly from the water storage tank 4. For this reason, a water intake pump 5, an expansion tank 15, and the like are separately provided (see, for example, Patent Document 1).

JP-A-8-105399

In the above conventional technique, the following problems remain.
Since the intake pump necessary as a cooling facility for the pump drainage station is driven by an electric motor, the intake pump cannot be driven when the commercial power supply is interrupted, when the private power generator fails, or when the intake pump itself fails. Therefore, there is a problem that the internal combustion engine cannot be cooled, and the operation of the drain pump is hindered. In addition, the intake pump requires equipment such as wiring and control equipment, and the entire cooling equipment of the intake pump system is complicated, and cooling water cannot be supplied even if some of these equipment fail. This will affect the operation of the drainage pump. Furthermore, there has been a problem that a large amount of money and labor are required for maintenance of the intake pump and control equipment. In order to improve such problems, the cooling equipment may be remodeled or renewed. However, it is difficult to realize remodeling or renewal due to constraints such as installation space, maintenance space, civil engineering and construction structure, and cost. There is also a pump drainage station.

  The present invention has been made in view of the above-described conventional problems, and even if there is a large difference in elevation between the cooling water pump attached to the internal combustion engine and the water storage tank, this is solved, and the cooling The purpose is to provide a highly reliable cooling facility for a pump drainage station that eliminates the need for an intake pump system.

  The present invention employs the following configuration in order to solve the above problems. That is, the cooling facility for the pump drainage station according to the first invention includes an internal combustion engine, a cooling water pump driven by the internal combustion engine to cool the internal combustion engine with cooling water, and a water storage tank for storing the cooling water. A cooling facility for a pump drainage station, wherein the water storage tank includes a communication pipe that communicates the inside and the outside, and the cooling water pump includes a suction pipe that takes in the cooling water, and the internal combustion engine. And a return pipe for returning the cooling water after being cooled and heat-exchanged to the water storage tank, wherein the water level of the cooling water is held at a position higher than the water storage tank in the communication pipe.

  In the cooling facility of the pump drainage station of the present invention, the cooling water level is maintained at a position higher than the water storage tank in the communication pipe, so even if there is a difference in height between the internal combustion engine and the water storage tank, Cooling water can be taken from the water storage tank by the water pump, and the internal combustion engine or the like can be cooled only by the cooling water pump.

  The cooling facility for the pump drainage station according to the second invention is the cooling facility for the pump drainage plant according to the first invention, wherein the upper end of the communication pipe is arranged at a position higher than the cooling water pump, and the cooling pipe is located in the communication pipe. The water level of the cooling water is maintained at a position higher than the cooling water pump.

  That is, in the cooling facility of the pump drainage station of the present invention, the upper end of the communication pipe is arranged at a position higher than the cooling water pump, and the water level of the cooling water in the communication pipe is held at a position higher than the cooling water pump. Even if there is a large difference in elevation between the internal combustion engine and the water storage tank, the cooling water can be taken from the water storage tank by the cooling water pump, and the internal combustion engine or the like can be cooled only by the cooling water pump.

According to a third aspect of the present invention, there is provided the cooling facility for the pump drainage station according to the first or second aspect of the invention, wherein the suction pipe is inserted into the communication pipe and the heat exchange is performed. The cooling water is returned to the communication pipe.
That is, in the cooling facility of this pump drainage station, since the suction pipe is inserted into the communication pipe, it is only one communication pipe that penetrates the first floor, and the watertight construction of the penetration portion is only required in one place. Construction is easy.

According to a fourth aspect of the present invention, there is provided a cooling facility for a pump drainage station, wherein the communication pipe has an enlarged diameter portion at an upper end thereof, a constant water level valve provided at the enlarged diameter portion, and a supply pipe for the constant water level valve. And the constant water level valve opens when the water level in the enlarged diameter portion falls below a certain value, and replenishes the enlarged diameter portion with water from the makeup water source. The water level in the communication pipe is kept constant.
That is, in this cooling facility of the pump drainage station, the constant water level valve opens when the water level in the enlarged diameter part falls below a certain value, and replenishes the enlarged diameter part with water from the makeup water source to control the water level in the communication pipe. Since it is kept constant, it becomes easy to supply cooling water and manage the water level.

The pump drainage station cooling facility according to a fifth aspect of the present invention is the pump drainage station cooling facility according to any one of the first to fourth aspects of the invention, wherein the pump drainage station is supplied with a suction water tank and water in the suction water tank. A drainage pump for sucking up and draining is installed, and the internal combustion engine is a diesel engine for driving the drainage pump.
That is, in the cooling facility of the pump drainage station, the internal combustion engine is a diesel engine that drives the drainage pump, so that the diesel engine that is the prime mover of the drainage pump can be cooled by the cooling water pump.

A cooling facility for a pump drainage station according to a sixth aspect of the present invention is the cooling facility for a pump drainage station according to any one of the first to fourth aspects, comprising a generator, wherein the internal combustion engine drives the generator. It is an institution.
That is, in this pump drainage station cooling facility, since the internal combustion engine is a diesel engine that drives the generator, a generator (for example, control power supply, lighting, dust removal) that is used for emergency when the commercial power supply is shut off. The diesel engine that is the prime mover of the generator that supplies power to the machine or the like can be cooled by the cooling water pump.

The present invention has the following effects.
That is, according to the cooling facility of the pump drainage station of the present invention, the cooling water level is maintained at a position higher than the water storage tank in the communication pipe, so there is a difference in height between the arrangement positions of the internal combustion engine and the water storage tank. However, the cooling water can be taken from the water storage tank by the cooling water pump, and the internal combustion engine or the like can be cooled only by the cooling water pump. Further, the upper end of the communication pipe is arranged at a position higher than the cooling water pump, and the water level of the cooling water in the communication pipe is held at a position higher than the cooling water pump, so that the internal combustion engine and the water storage tank are arranged. Even if there is a large level difference, the internal combustion engine or the like can be cooled only by the cooling water pump. Therefore, the cooling facility for the pump drainage station according to the present invention eliminates the need for a cooling intake pump system facility, simplifies the cooling facility, and improves the reliability of the facility.

In 1st Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. In 2nd Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. In 3rd Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. In 4th Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. In 5th Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. In 6th Embodiment of the cooling equipment of the pump drainage station which concerns on this invention, it is a whole block diagram which shows piping and arrangement | positioning of equipment. It is a whole block diagram which shows piping and arrangement | positioning of an installation in the prior art example of the cooling equipment of the pump drainage station which concerns on this invention. It is a whole block diagram which shows piping and arrangement | positioning of an installation in the prior art example of the cooling equipment of the pump drainage station which concerns on this invention.

  Hereinafter, a first embodiment of cooling equipment for a pump drainage station according to the present invention will be described with reference to FIG. In addition, the same code | symbol is attached | subjected to the same component demonstrated with reference to FIG.7 and FIG.8 as a prior art, and the description is abbreviate | omitted.

As shown in FIG. 1, the cooling facility for the pump drainage station according to the present embodiment includes an internal combustion engine 7, a cooling water pump 12 driven by the internal combustion engine 7 to cool the internal combustion engine 7 with the cooling water W, and the cooling water W. It is a cooling facility for a pump drainage station equipped with a water storage tank 20 to be stored, and the water storage tank 20 includes a communication pipe 18 that communicates the inside and the outside.
The pump drainage station is provided with a suction water tank 3 provided below the first floor 1 and a drainage pump 2 that sucks up and drains the water in the suction water tank 3. The internal combustion engine 7 is a diesel engine that drives the drainage pump 2.

In addition, the cooling water pump 12 passes through the first floor 1 and the suction pipe 23 that is suspended by the water storage tank 20, and the cooling water W after the internal combustion engine 7 is cooled and heat-exchanged through the communication pipe 18. And a return pipe 24 that returns to the water storage tank 20.
The upper end of the communication pipe 18 extends to the vicinity of the second floor 6, and the water level of the cooling water W in the communication pipe 18 is held at a position higher than the water storage tank 20.

  That is, the communication pipe 18 is disposed through the first floor 1 in a water tank 20 formed entirely watertight, and the inside and the outside of the water tank 20 communicate with each other. The upper end of the communication pipe 18 extends to the vicinity of the second floor 6, and the water level of the cooling water W in the communication pipe 18 is held at a position higher than the water storage tank 20. The penetrating portion of the first floor 1 through which the communication pipe 18 and the suction pipe 23 penetrate is watertightly constructed, and the communication pipe 18 and the suction pipe 23 are fixed by an appropriate method.

The water level of the communication pipe 18 is maintained at a position higher than the water storage tank 20, one end of the suction pipe 23 is suspended near the bottom of the water storage tank 20, and the other end of the suction pipe 23 is connected to the suction side of the cooling water pump 12. ing.
The discharge side of the cooling water pump 12 is branched into two, one being connected to the inlet of the cooling jacket 10 of the internal combustion engine 7 and the other being connected to the inlet of the oil cooler 11 of the speed reducer 8. The outlet side of the cooling jacket 10 and the outlet side of the oil cooler 11 are connected to the return pipe 24, and the distal end of the return pipe 24 is open in the communication pipe 18 .

The cooling of the internal combustion engine 7 in the cooling facility of the present embodiment starts with the cooling water pump 12 being driven as the internal combustion engine 7 is driven, and the cooling water W is supplied from the water storage tank 20 by the cooling water pump 12 and the oil cooler 10. 11 and are respectively cooled.
The cooling water W that has been heated and exchanged between the cooling jacket 10 and the oil cooler 11 returns to the water storage tank 20 from the return pipe 24 via the communication pipe 18, and after being cooled, is used again as the cooling water W. .
The communication pipe 18 is provided with a water level monitoring gauge (not shown), and the water level in the communication pipe 18 can be visually monitored. Therefore, the cooling water W is consumed in the circulating cooling system and the water level is lowered. In such a case, tap water or the like may be replenished by an appropriate method.

  Thus, in the cooling facility for the pump drainage station of this embodiment, the upper end of the communication pipe 18 is extended to the vicinity of the second floor 6, and the water level of the cooling water W in the communication pipe 18 is higher than the water storage tank 20. Therefore, even if there is a height difference between the arrangement positions of the internal combustion engine 7 and the water storage tank 20, the cooling water pump 12 can take the cooling water W from the water storage tank 20, and only the cooling water pump 12 can be taken. Thus, the internal combustion engine 7 and the speed reducer 8 can be cooled.

Therefore, in this embodiment, the cooling equipment of the conventional intake pump system is unnecessary, the cooling equipment is simplified, and the reliability of the cooling equipment of the pump drainage station is improved.
In addition, when the cooling equipment is modified or updated, even in an existing pump drainage station that is difficult to realize due to restrictions on installation space, maintenance space, civil engineering structure, cost, etc., according to this embodiment, the existing cooling It is only necessary to install a communication pipe in the water tank and perform watertight construction. Installation of new equipment is unnecessary and modification is easy.

  Next, 2nd Embodiment of the cooling equipment of the pump drainage station which concerns on this invention is described below with reference to FIG. In addition, the same code | symbol is attached | subjected to the same component demonstrated in the said embodiment, and the description is abbreviate | omitted.

The cooling water pump 12 stores the suction pipe 23 penetrating the first floor 1 and suspended in the water storage tank 20, and the cooling water W after the internal combustion engine 7 is cooled and heat-exchanged via the communication pipe 21. And a return pipe 24 that returns to the tank 20.
The upper end of the communication pipe 21 is arranged at a position higher than the cooling water pump 12 so that the cooling water W is filled from the water storage tank 20 to the upper part of the communication pipe 21 and the water level of the cooling water W in the communication pipe 21 is reached. Is held at a position higher than the cooling water pump 12.

The water level of the communication pipe 21 is maintained at a position higher than that of the cooling water pump 12, passes through the first floor 1, and one end of the suction pipe 23 hangs down to the vicinity of the bottom of the water storage tank 20, and the other end of the suction pipe 23 is The cooling water pump 12 is connected to the suction side.
The discharge side of the cooling water pump 12 is branched into two, one being connected to the inlet of the cooling jacket 10 of the internal combustion engine 7 and the other being connected to the inlet of the oil cooler 11 of the speed reducer 8. Further, the outlet side of the cooling jacket 10 and the outlet side of the oil cooler 11 are connected to the return pipe 24, and the distal end of the return pipe 24 opens in the communication pipe 21.

The cooling of the internal combustion engine 7 in the cooling facility of the present embodiment starts with the cooling water pump 12 being driven as the internal combustion engine 7 is driven, and the cooling water W is supplied from the water storage tank 20 by the cooling water pump 12 and the oil cooler 10. 11 and are respectively cooled.
The cooling water W that has been heated and exchanged between the cooling jacket 10 and the oil cooler 11 returns to the water storage tank 20 from the return pipe 24 via the communication pipe 21, is cooled, and is used again as the cooling water W. .
The communication pipe 21 is provided with a water level monitoring gauge (not shown), and the water level in the communication pipe 21 can be visually monitored, so that the cooling water W is consumed in the circulating cooling system and the water level is lowered. In such a case, tap water or the like may be replenished by an appropriate method.

  Thus, in the cooling facility of the pump drainage station of this embodiment, the upper end of the communication pipe 21 is arranged at a position higher than the cooling water pump 12, and the water level of the cooling water W in the communication pipe 21 is higher than the cooling water pump 12. Therefore, the cooling water W can be taken out from the water storage tank 20 by the cooling water pump 12 and the cooling water even if there is a large difference in height between the arrangement positions of the internal combustion engine 7 and the water storage tank 20. Even if the suction function of the pump 12 is low, the cooling water W can be reliably sucked, and the internal combustion engine 7 and the speed reducer 8 can be cooled only by the cooling water pump 12.

  Next, 3rd Embodiment of the cooling equipment of the pump drainage station which concerns on this invention is described below with reference to FIG. In addition, the same code | symbol is attached | subjected to the same component demonstrated in the said embodiment, and the description is abbreviate | omitted.

  The difference between the third embodiment and the second embodiment is that, in the second embodiment, the suction pipe 23 passes through the first floor 1 outside the communication pipe 21 and hangs down to the vicinity of the bottom of the water tank 20. On the other hand, in the cooling facility for the pump drainage station of the third embodiment, the suction pipe 25 is inserted into the communication pipe 21 and suspended from the water storage tank 20 as shown in FIG. That is, in the third embodiment, the distal end side of the suction pipe 25 is inserted into the communication pipe 21 and arranged to return the cooling water W after heat exchange into the communication pipe 21.

The water level of the communication pipe 21 is maintained at a position higher than the cooling water pump 12, one end of the suction pipe 25 is suspended from the upper end of the communication pipe 21 to the vicinity of the bottom of the water storage tank 20, and the other end of the suction pipe 25 is the cooling water pump. 12 is connected to the suction side.
The discharge side of the cooling water pump 12 is branched into two, one being connected to the inlet of the cooling jacket 10 of the internal combustion engine 7 and the other being connected to the inlet of the oil cooler 11 of the speed reducer 8. The outlet side of the cooling jacket 10 and the outlet side of the oil cooler 11 are connected to the return pipe 24, and the tip of the return pipe 24 is open in the communication pipe 21.

The cooling of the internal combustion engine 7 in the cooling facility of the present embodiment starts with the cooling water pump 12 being driven as the internal combustion engine 7 is driven, and the cooling water W is supplied from the water storage tank 20 by the cooling water pump 12 and the oil cooler 10. 11 and are respectively cooled.
The cooling water W that has been heated and exchanged between the cooling jacket 10 and the oil cooler 11 returns to the water storage tank 20 from the return pipe 24 via the communication pipe 21, is cooled, and is used again as the cooling water W. .

  As described above, in the cooling facility for the pump drainage station according to the present embodiment, since the suction pipe 25 is inserted into the communication pipe 21, only one communication pipe penetrates the first floor 1, and the watertight construction of the penetration portion is performed. Can be installed in one place and is easy to install.

  Next, fourth to sixth embodiments of cooling equipment for a pump drainage station according to the present invention will be described below with reference to FIGS. 4 to 6.

  As shown in FIG. 4, the cooling facility for the pump drainage station of the fourth embodiment is provided with two communication pipes 31 and 40, and one communication pipe 40 for water intake is at the upper end of the other part from the other part. A constant water level valve 42 provided in the enlarged diameter portion 41, a supply water source 45 (tap water as an example) connected to the constant water level valve 42 via a supply pipe 42a; It has.

That is, in the fourth embodiment, the constant water level valve 42 opens when the water level in the enlarged diameter portion 41 falls below a certain value, and supplies the enlarged diameter portion 41 with water from the makeup water source 45 to communicate with the communication pipe. The water level in 40 is set to be kept constant.
The lower end of the water intake communication pipe 40 is extended to the bottom of the water storage tank 20.
One end of the suction pipe 32 is suspended from the upper end of the enlarged diameter portion 41 into the communication pipe 40, and the other end of the suction pipe 32 is connected to the suction side of the cooling water pump 12.

The discharge side of the cooling water pump 12 is branched into two, one connected to the inlet of the cooling jacket 10 of the internal combustion engine 7 and the other connected to the inlet of the oil cooler 11 of the speed reducer 8. The outlet side of the cooling jacket 10 and the outlet side of the oil cooler 11 are connected to the return pipe 33, and the tip of the return pipe 33 is open in the communication pipe 31.
Thus, in the cooling facility for the pump drainage station of the fourth embodiment, the constant water level valve 42 opens when the water level in the enlarged diameter portion 41 falls below a certain value, and the enlarged diameter portion supplies water from the makeup water source 45. Since the water level in the communication pipe 40 is kept constant by being replenished to 41, the replenishment of the cooling water W and the water level management are facilitated.

  In the cooling facility for the pump drainage station of the fourth embodiment, two communication pipes are provided and the enlarged diameter part 41 is provided in one of the intake pipes 40, but the enlarged diameter part 41 is heat-exchanged. You may provide in the other communicating pipe 31 in which the cooling water W after this returns. One communication pipe may be used.

  In the cooling facility for the pump drainage station of the fifth embodiment, as shown in FIG. 5, two internal combustion engines are installed, and in addition to the internal combustion engine 7, an internal combustion engine 51 that is a prime mover of the generator 50 is installed. Yes.

That is, in the fifth embodiment, the internal combustion engine 7 that is the prime mover of the drainage pump 2 and the internal combustion engine 51 that is the prime mover of the generator 50 are arranged on the second floor 6. Both the internal combustion engine 7 and the internal combustion engine 51 are diesel engines. A cooling water pump 12 is attached to the internal combustion engine 7, and a cooling water pump 52 is also attached to the internal combustion engine 51. The generator 50 is, for example, a generator that supplies power to a control power source, lighting, a dust remover, and the like, and is used for emergency when the commercial power source is shut off.
In addition, communication pipes 53 and 54 are disposed in the water storage tank 20 in a watertight manner, and upper ends of the communication pipes 53 and 54 are extended to a position higher than the internal combustion engines 7 and 51 through the second floor 6. The water level in the pipes 53 and 54 is maintained at a position higher than the cooling water pumps 12 and 52.

One ends of the suction pipes 55 and 56 are suspended from the upper end of the communication pipe 53 into the communication pipe 53, and the other ends of the suction pipes 55 and 56 are connected to the suction sides of the cooling water pump 12 and the cooling water pump 52, respectively. Yes.
The discharge side of the cooling water pump 12 is connected to the cooling jacket 57 of the internal combustion engine 7, and the discharge side of the cooling water pump 52 is connected to the cooling jacket 58 of the internal combustion engine 51. The outlet side of the cooling jacket 57 is connected to the return pipe 59, the outlet side of the cooling jacket 58 is connected to the return pipe 60, and the tips of the return pipes 59 and 60 are open in the communication pipe 54.

  As described above, in the cooling facility for the pump drainage station according to the fifth embodiment, the cooling water pumps 12 and 52 attached to the internal combustion engine 7 that is the prime mover of the drainage pump 2 and the internal combustion engine 51 that is the prime mover of the generator 50. Thus, since the corresponding internal combustion engines can be cooled, the cooling equipment of the conventional intake pump system is unnecessary, the cooling equipment is simplified, and the reliability of the cooling equipment of the pump drainage station is improved.

  Next, the difference between the sixth embodiment and the third embodiment is that in the third embodiment, the heat exchanged cooling water W is directly returned to the communication pipe 21 by the return pipe 24, whereas In the cooling facility for the pump drainage station of the sixth embodiment, as shown in FIG. 6, the heat-exchanged cooling water W is sent to the pipe cooler 16 by the return pipe 67 and is cooled by the pipe cooler 16 and then communicated. This is the point returned to the tube 65.

  That is, in the sixth embodiment, the in-pipe cooler 16 is connected to the discharge side of the drainage pump 2 installed on the first floor 1. In addition, the entire water storage tank 20 in which the cooling water W is stored is formed watertight, and a communication pipe 65 is disposed through the first floor 1 which is the top surface of the water storage tank 20. The inside and the outside of the tank 20 are communicated. The upper end of the communication pipe 65 extends through the second floor 6 to a position higher than the internal combustion engine 7, and the water level in the communication pipe 65 is held at a position higher than the cooling water pump 12. In addition, the enlarged diameter part is provided in the upper part of the communicating pipe 65 similarly to 4th Embodiment.

The penetrating portion of the first floor 1 through which the communication pipe 65 passes is watertightly constructed, and the communication pipe 65 is fixed by an appropriate method. One end of the suction pipe 66 is suspended from the upper end of the communication pipe 65 to the vicinity of the bottom of the water storage tank 20, and the other end of the suction pipe 66 is connected to the suction side of the cooling water pump 12.
The discharge side of the cooling water pump 12 is branched into two, one being connected to the return pipe 67 via the cooling jacket 10 of the internal combustion engine 7 and the other being connected to the return pipe 67 via the oil cooler 11 of the speed reducer 8. 67. The return pipe 67 has a leading end opened in the communication pipe 65 through the pipe cooler 16.

  In the sixth embodiment, when the cooling water pump 12 is driven as the internal combustion engine 7 is driven, the cooling water W in the water storage tank 20 is pumped to the cooling jacket 10 and the oil cooler 11 by the cooling water pump 12 to be cooled. Done. Then, the cooling water W which has been heated and exchanged between the cooling jacket 10 and the oil cooler 11 passes through the return pipe 67 and is cooled by the in-pipe cooler 16, and then returns from the communication pipe 65 to the water storage tank 20 and is again cooled. Used as W.

  As described above, in the cooling facility for the pump drainage station according to the sixth embodiment, the cooling water W that has been heat-exchanged to become hot water is cooled by the pipe cooler 16 and returned to the water storage tank 20, so that an increase in the water temperature of the water storage tank 20 is suppressed. Thus, the internal combustion engine 7 can be driven for a long time, which is suitable for a management operation.

In addition, this invention is not limited to said each embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, in the above embodiments, the communication pipe is formed as a straight pipe, but the communication pipe is not limited to a straight pipe, and may be formed by appropriately providing a bent portion according to the construction conditions.
Moreover, a cooling fin may be provided in the outer peripheral part of the communicating pipe where the heat-exchanged cooling water (hot water) returns to enhance the cooling effect.

  DESCRIPTION OF SYMBOLS 2 ... Drain pump, 3 ... Suction water tank, 4,20 ... Water storage tank, 7,51 ... Internal combustion engine, 12, 52 ... Cooling water pump, 18, 21, 30, 31, 40, 53, 54, 65 ... Communication pipe , 23, 25, 32, 55, 56, 66 ... suction pipe, 24, 33, 59, 67 ... return pipe, 41 ... expanded diameter part, 42 ... constant water level valve, 42a ... supply pipe, 45 ... supply water source, 50 ... Generator, W ... Cooling water

Claims (6)

Cooling of a pump drainage station comprising an internal combustion engine, a cooling water pump attached to the internal combustion engine and driven by the internal combustion engine to cool the internal combustion engine with cooling water, and a water storage tank for storing the cooling water Equipment,
The water storage tank is formed as a whole in a watertight manner and includes a communication pipe that communicates the inside and the outside.
The cooling water pump, a suction pipe for taking the cooling water from the water storage tank ;
A return pipe for returning the cooling water after cooling and heat exchange of the internal combustion engine to the water storage tank via the communication pipe ;
The water level of the cooling water is maintained at a position higher than the water storage tank in the communication pipe ;
A cooling facility for a pump drainage station , wherein the internal combustion engine is cooled only by the cooling water pump . In the cooling equipment of the pump drainage station according to claim 1,
Cooling of a pump drainage station, wherein an upper end of the communication pipe is arranged at a position higher than the cooling water pump, and a water level of the cooling water in the communication pipe is held at a position higher than the cooling water pump. Facility. In the cooling equipment of the pump drainage station according to claim 1 or 2,
The cooling facility for a pump drainage station, wherein the suction pipe is inserted into the communication pipe and the cooling water after the heat exchange is returned to the communication pipe. In the cooling equipment of the pump drainage station according to any one of claims 1 to 3,
The communication pipe has an enlarged diameter portion at an upper end thereof;
A constant water level valve provided in the enlarged diameter portion;
A makeup water source connected to the constant water level valve via a makeup pipe,
The constant water level valve opens when the water level in the enlarged diameter portion falls below a certain value, and replenishes the enlarged diameter portion with water from the makeup water source to keep the water level in the communication pipe constant. A cooling facility for the pump drainage station. In the cooling equipment of the pump drainage station according to any one of claims 1 to 4,
In the pump drainage station, a suction water tank and a drainage pump that sucks up and drains water in the suction water tank are installed,
A cooling facility for a pump drainage station, wherein the internal combustion engine is a diesel engine that drives the drainage pump. In the cooling equipment of the pump drainage station according to any one of claims 1 to 4,
Equipped with a generator,
A cooling facility for a pump drainage station, wherein the internal combustion engine is a diesel engine that drives the generator.

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