JP2010144532A - Water tank for cooling-warming up engine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a water tank for cooling-warming up an engine which has a capacity sufficient to supply water for cooling-warming up the engine simultaneously to a plurality of engines, requires less operation cost, easily maintainable even when a part for heating the water is defective, does not affect the circumference even if the water leaks by an unforeseen accident, enables the hot water to be kept heated once heated, and operable with a timer so as to be used even in the date after a holiday with less cost. <P>SOLUTION: The water tank for cooling-warming up an engine is disposed in a space part formed by digging a plant foundation surface. The upper surface of the water tank is covered by a cover part formed of a heat insulation material on which the user can walk around, and the circumference thereof is covered by the heat insulation material. An electric heater and a stirrer are vertically inserted into the tank from the cover part, and a connection part to an external power supply is provided to the upper surface of the cover part. The temperature of the water is controlled by a control unit. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  TECHNICAL FIELD The present invention relates to an engine cooling / warming water tank, and more particularly to an engine cooling / warming water tank that is installed in a large engine manufacturing factory and supplies cooling / warming water used during a trial operation of a plurality of engines. Is.

  In a diesel engine or the like, for example, as described in Patent Document 1, it is necessary to bring the engine itself to a starting temperature at the time of starting, and a warm-up device using a heater is provided in the cooling water system and the lubricating oil system. In a small engine as shown in Patent Document 1, it is sufficient to warm up by a warm-up device provided in each engine, but a large amount of gas engine used for a generator or the like has a large amount. Since cooling water is required, an external tank is generally provided.

  Therefore, in a manufacturing factory where a plurality of large gas engines can be manufactured simultaneously, in order to secure engine cooling and warm-up water used during the trial operation of the completed engine, a steam pipe is arranged inside, for example, 30 to A tank with a large capacity of 50 kl is provided and heated with steam so that, for example, hot water of about 70 ° C. can be supplied to a plurality of engines simultaneously.

  In this case, the steam is generally supplied from a boiler for creating hot water to be used in the factory, but the engine test run is not always at the completion of the engine. The water stored in the tank is often warmed only during the test run. However, since the tank is large in size, an enormous amount of steam is required to warm the cold water to about 70 ° C. for warm-up. Also, if the test run is set for the convenience of the user who ordered the engine, for example, the day after the holiday, it must be heated by supplying steam from the boiler on the holiday, so there is a large amount of expenses including the labor cost of boiler operation personnel. This is the current situation.

  As a prior art regarding such a large tank, for example, Patent Document 2 relates to an antifreezing system in an underground tank for storing ultra-low temperature liquefied natural gas (LNG). The hot water circulation system that prevents the frozen soil from growing around the tank by circulating the water, the cold heat of the ultra low temperature liquefied gas pumped from the underground tank for storing the ultra low temperature liquefied natural gas, and the heat of the seawater or river water as heat sources A drive system that drives the cold turbine and a compressor driven by the cold turbine of the drive system compresses the heat medium and guides it to the heat exchanger, and the hot water circulation system by the condensation latent heat of the heat medium in the heat exchanger Heat the hot water inside, and heat the heat medium cooled by this heating through the expansion valve and the atmospheric heat absorber to absorb heat from the atmosphere and raise the heat medium temperature, Underground for storage of ultra-low temperature liquefied natural gas with a frozen soil prevention system that heats the hot water circulating in the heat fence by a hot water heating system that heats the hot water by compressing it with the compressor A tank is shown.

  Patent Document 3 relates to an underfloor storage tank for a house, but a concrete frame having an opening that opens upward is formed on a concrete slab, and the interior of the frame is A box-shaped hot water storage tank, a heat insulating material is disposed between the concrete slab and the frame and the wall of the hot water storage tank, respectively, and a lid member is disposed on the upper side wall of the hot water storage tank via the heat insulating material, An underfloor storage type hot water storage type electric water heater in which an opening of a frame is closed is shown.

Japanese Patent Laid-Open No. 60-13980 Japanese Patent Laid-Open No. 4-312299 JP-A-8-166165

  The engine cooling / warming-up water tank of the present application is required to have a capacity sufficient to supply cooling / warming-up water to a plurality of engines at the same time in a manufacturing plant where a plurality of engines can be manufactured. In addition, while warming water without incurring operating costs, it is possible to prevent accidents when it is heated, and maintenance is easy in the event of a failure, and even if the tank breaks due to unforeseen circumstances, it is a factory. It is required not to affect the surroundings. Furthermore, it is desirable that the warmed water is cooled in a short time, so that it is costly, so that it can be kept warm, and that a timer operation is possible so that it can be used on the next day of the holiday without cost.

  However, the underground tank for storing natural gas shown in Patent Document 2 is for storing natural gas liquefied at ultra-low temperature, and the heat fence is provided to prevent the surroundings of the tank from becoming frozen. It is not used to warm the water in the tank as in the present application. Moreover, the underfloor storage type hot water storage type electric water heater of Patent Document 3 is a housing underfloor storage tank that stores hot water produced by other devices, and is small, for example, 30-50 kl as in the present application. It cannot be diverted to a large-capacity tank.

  Therefore, in the present invention, it has a capacity that can supply cooling and warming water to a plurality of engines at the same time, and maintenance is easy even in the event of a failure of a component that warms water without incurring operating costs. A water tank for engine cooling / warming up that does not affect the surroundings even if water leaks out, can be kept warm after warming up, and can be operated on the next day of the holiday without cost. Providing is a challenge.

In order to solve the above problems, the engine cooling / warming-up warm water tank according to the present invention is:
An engine cooling / warming water tank installed in a space where the factory foundation surface is dug down.
An engine cooling / warming water tank installed in a space where the factory foundation surface is dug down.
The engine cooling / warming water tank is provided with a cover portion that is constructed to be walkable and has heat insulation properties, and is covered with a heat insulating material, and is inserted vertically into the tank from the cover portion. An electric heater provided with a connection to the power supply on the top surface of the unit and a stirrer for stirring the contained water, receiving a signal from a temperature sensor arranged inside the tank, And a control device for controlling the temperature of the liquid crystal.

  By installing an engine cooling / warming water tank in the space where the factory basic surface is dug in this way, it can be installed without problems even as a large capacity tank that supplies cooling / warming water to multiple engines simultaneously. In addition, even if water leaks due to unforeseen circumstances, it does not affect the surroundings. In addition, by covering the area including the upper surface with a heat insulating material, it is possible to keep warm after it has been warmed once. By inserting the heater and the stirring device vertically from the upper surface, these heaters and the stirring device can be easily broken. Can be maintained at low cost.

  In addition, since the tank is provided with a ventilation space between the bottom surface of the dug space and the bottom of the tank, it is possible to prevent the tank from being made of iron and rusting and cooling at low cost. -A warm-up water tank can be installed.

  The control device is configured to receive a signal from a liquid level meter provided in the tank, issue an alarm when the liquid level in the tank is lowered, and turn off the heater. Thus, it is possible to prevent the heater from being cooked empty.

  Furthermore, the control device has a timer for reserving the heater power-on time, so that it becomes possible for the boiler operation personnel to be able to perform the test operation on the day after the holiday as described above. Operation at a low cost is possible without requiring securing.

  In addition, by having a pipe connection part exposed on the factory basic surface and having a backup steam pipe arranged in the tank, even if the electric heater breaks, hot water is obtained with steam Can be.

  As described above, the engine cooling / warming water tank according to the present invention does not affect the surroundings even when water leaks due to an unexpected situation, and can be kept warm after being heated once. Even if the stirrer is broken, it can be easily maintained and is suitable as a water tank for cooling and warming up installed in a factory.

  In addition, because the ventilation space is provided between the bottom of the dug space and the tank lower part, it is resistant to corrosion and has a backup steam pipe. And having a timer makes it possible to drive at low cost without having to secure boiler operation personnel, etc., even if a test run must be carried out the day after the holiday. Engine cooling / warming water tank can be used.

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Absent.

  FIG. 1 is a schematic perspective view of an example configuration of an engine cooling / warming water tank according to the present invention, and FIG. 2 shows the factory foundation of the engine cooling / warming water tank according to the present invention shown in FIG. It is sectional drawing which showed the state installed in the space part. In FIG. 1 and FIG. 2, the same components are denoted by the same reference numerals.

  First, in FIG. 1, 10 is an engine cooling / warming-up water tank body formed of a metal such as iron in a rectangular parallelepiped shape, and 12 is inserted into the water vertically from the upper part of the engine cooling / warming-up water tank body 10. An electric heater, 14 is an external power source connecting portion in the electric heater 12, 16 is a stirring device inserted into the water vertically from the upper part of the engine cooling / warming water tank body 10, and 18 is provided in the stirring device 16. The stirring fins 20, 20 is a steam pipe for backup, and 22 is a tank support member made of, for example, H-shaped steel.

  In FIG. 2, reference numeral 24 denotes a control device for controlling the water temperature stored in the engine cooling / warming water tank. Specifically, the control device 24 receives signals from the liquid level meter 40 and the temperature sensor 42. In response, the heater power supply 26 is controlled, water heating, water temperature control by stirring, cooling / warming-up water heating timing reservation by the timer 38, and the like are performed. The water temperature in the tank 10 may be controlled by controlling the return cooling water temperature after the engine 58 is warmed up by the cooler 34 as shown in FIG.

  Reference numeral 28 denotes a pump for supplying cooling / warming-up water to the engine 58, and the pump 28 is driven by a motor 30. In order to keep the water tank body 10 for cooling and warming up the engine, 44 is a heat insulating material using rock wool or the like covering the surroundings, and 46 is a heat insulating material such as a gypsum board so that a person can walk on it. 48 is the factory basic surface, 50 is the bottom of the space where the factory basic surface 48 is dug down to install the tank, and 52 is the supply for supplying cooling and warming water to the engine 58 The service pipe 56 is a return water pipe.

  As shown in the cross-sectional view of FIG. 2, the engine cooling / warming water tank 10 according to the present invention has the engine cooling / warming water tank body 10 installed in the space portion where the factory basic surface 48 is dug down to warm water. In order to keep warm, the surroundings were covered with a heat insulating material 44 using rock wool and the like, and the upper portion was configured with a cover portion 46 made of a material using a heat insulating material such as a gypsum board having a strength capable of walking. Since the upper surface of the lid 46 is substantially the same height as the factory basic surface 48, and the main body 10 is made of metal such as iron, there is a possibility that the bottom part will corrode if the bottom part directly contacts the bottom part 50 of the dug space. Therefore, the tank support member 22 is raised to form a ventilation space between the bottom portion and the dug-down space bottom portion 50.

  In addition, since the electric heater for heating in such a tank is short-circuited when the power supply connection portion is submerged, it is common to insert the heater portion from the side to make the power supply connection portion outside the tank. The engine cooling / warming-up water tank 10 is large and is installed by digging down the factory basic surface 48, so that maintenance from the side is difficult, and water stored in the tank 10 is saved during maintenance. Is difficult. Therefore, in the engine cooling / warming water tank 10 of the present invention, the electric heater 12 is vertically inserted into the tank 10 from the lid portion 46 in consideration of maintainability, and the external power supply connection portion 14 is exposed upward from the lid portion 46. It is a structure to make it.

  In addition, when the electric heater 12 is inserted vertically into the tank from the lid portion 46 in this way, it becomes difficult to uniformly warm the stored water. In the present invention, the stirring fin that rotates in water and stirs the water. As in the case of the electric heater 12, the stirrer 16 having the motor 18 and the external power supply connection portion on the lid portion 46 is inserted vertically into the tank 10 from the lid portion 46 as necessary. The water in the tank 10 can be stirred.

  In the engine cooling / warming-up water tank 10 of the present invention configured as described above, the electric heater 12 receives the power supply from the heater power supply 26 to warm the water, and the heater power supply 26 is turned on / off from the temperature sensor 42. Is controlled by the control device 24 that receives the signal, and the temperature is controlled to be constant. Then, as described above, the water is warmed to, for example, about 70 ° C., the supply pump 28 is driven, and warm water for warm-up is sent from the supply pipe 52 to the engine 58.

  When the engine 58 is warmed by the warm-up warm water and the engine 58 is started, the water warmed by the operation of the engine 58 returns from the return water pipe 56. At this time, when the return water is higher than the water temperature in the engine cooling / warming water tank body 10 and the water temperature in the tank 10 rises, the control device 24 turns off the electric heater 12. Further, as described above, the water is cooled by the cooler 34 so as to be about 70 ° C., for example.

  As described above, when the test run is set on the day after a holiday for the convenience of the user who ordered the engine 58, the water in the engine cooling / warming-up water tank body 10 is warmed before the test run. In the present invention, a timer 38 is prepared to meet such a demand. That is, when there is such a request, the time for turning on the power of the electric heater 12 is obtained from the time required for warming up the water for warming up and the time for performing the engine test operation, and set in the timer 38. In addition, the engine 58 can be started without any problem even during a trial run on the day after a holiday.

  Further, in the present invention, a backup steam pipe 20 is provided in preparation for a case where there is a request for a trial operation even though the electric heater 12 has failed for some reason. This backup steam pipe 20 is connected to a steam pipe in the factory (not shown) so that water in the engine cooling / warming water tank body 10 can be warmed with steam as before. This makes it possible to warm the water even if the electric heater 12 fails for some reason.

  In this way, the engine cooling / warming water tank according to the present invention does not affect the surroundings even when water leaks due to an unexpected situation, and can be kept warm after being warmed once. Even when the agitator is broken, it can be easily maintained and is suitable as a water tank for cooling and warming up installed in a factory.

  In addition, because the ventilation space is provided between the bottom of the dug space and the tank lower part, it is resistant to corrosion and has a backup steam pipe. And having a timer enables operation at low cost without the need to secure boiler operation personnel, etc., even if a test operation must be carried out the day after the holiday. Engine cooling / warming water tank can be used.

  According to the present invention, a cooling / warming-up water tank for supplying cooling / warming-up water used in a trial run of a plurality of engines installed in a large engine manufacturing factory has good maintainability, for example, water leaks. Can also be provided so as not to affect the surroundings.

It is an example structure perspective view of the engine cooling / warming-up water tank according to the present invention. It is sectional drawing which showed the state which installed the engine cooling and warming-up water tank which becomes this invention in the space part which dug down the factory foundation.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Engine cooling / warming water tank main body 12 Electric heater 14 External power source connection part 16 Stirrer 18 Stirrer fin 20 Backup steam pipe 22 Tank support member 24 Controller 26 Heater power supply 28 Pump 30 Motor 34 Cooler 36 Cooler controller 38 Timer 40 Liquid level meter 42 Temperature sensor 44 Heat insulating material 46 Cover part 48 Factory base surface 50 Underground space bottom 52 Supply pipe 56 Return water pipe 58 Engine

Claims (5)

An engine cooling / warming water tank installed in a space where the factory foundation surface is dug down.
The engine cooling / warming water tank is provided with a cover portion that is constructed to be walkable and has heat insulation properties, and is covered with a heat insulating material, and is inserted vertically into the tank from the cover portion. An electric heater provided with a connection to the power supply on the top surface of the unit and a stirrer for stirring the contained water, receiving a signal from a temperature sensor arranged inside the tank, An engine cooling / warming water tank, characterized by comprising a control device for controlling the temperature of the engine.   2. The engine cooling / warming water tank according to claim 1, wherein the tank is provided with a ventilation space between the bottom surface of the dug space and the bottom of the tank. 3.   The control device receives a signal from a liquid level meter provided in the tank, issues an alarm when the liquid level in the tank is lowered, and turns off the heater power to turn off the heater. The water tank for engine cooling / warming up according to claim 2, wherein cooking is prevented.   The engine cooling / warming-up water tank according to claim 3, wherein the control device has a timer for reserving a power ON time of the heater.   5. The engine cooling / warming water tank according to claim 4, wherein the engine cooling / warming water tank has a pipe connection portion exposed on the factory basic surface, and has a backup steam pipe arranged in the tank.

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