JP5436045B2 - Engine working machine - Google Patents

Description

  The present invention relates to an engine working machine, and more particularly to a portable engine working machine that drives a working machine such as a generator, a compressor, and a hydraulic unit by a diesel engine.

  At sites such as construction and civil engineering, or at disaster sites and shelters, portable engine machines that use diesel engines to drive various machines such as generators, compressors, and hydraulic units are often used. In general, these engine working machines include a working machine such as a generator, a compressor, and a hydraulic unit, a diesel engine that drives the working machine, and a fuel tank that stores fuel of the diesel engine in a casing having a soundproof structure. While storing, even if fuel or lubricating oil leaks from the engine or fuel tank, an oil breakwater is provided at the lower part of the casing to prevent these oils from flowing out (for example, (See Patent Document 1).

JP 2000-265848 A

  However, in a portable engine work machine that is often used outdoors, rainwater that has entered the casing accumulates in the oil breakwater, so drainage that opens the drain cock and discharges the water accumulated in the oil breakwater. The operation needs to be done regularly. If the drainage operation is neglected and the fuel leaks in the state where water has accumulated in the oil breakwater, the fuel may flow out to the outside beyond the capacity of the oil breakwater.

  Accordingly, an object of the present invention is to provide an engine working machine that can prevent rainwater from accumulating in an oil breakwater and extend a period for performing drainage operation by opening and closing a drain cock.

In order to achieve the above object, an engine work machine according to the present invention is an engine work machine in which a work machine and a diesel engine that drives the work machine are housed in a casing, and an oil barrier is provided in a lower portion of the casing. , the anti-oil Tsutsumiuchi, Rutotomoni provided with a heating means for evaporating the water collected-proof oil Tsutsumiuchi, the maximum temperature of the heating means, it is set to a temperature lower than the flash point of diesel fuel It is a feature.

Further, in the engine working machine according to the present invention, the heating means heats at least one of cooling water, lubricating oil, exhaust gas, return fuel, air compressed by a supercharger, or an electric heater of the diesel engine. It is characterized in that it is the source.

  The heating means is disposed in a heating chamber partitioned by a partition plate that divides the inside of the oil barrier, and the heating chamber includes a liquid passage that communicates a lower portion of the heating chamber with the oil barrier, and the heating chamber. It has the vent which makes the upper part of this communicate with the exterior of an oil breakwater. Furthermore, an opening provided with an opening / closing member that opens only when the inside of the casing becomes negative pressure and communicates the inside of the heating chamber and the inside of the casing is provided in the upper portion of the heating chamber. An air conditioning plate is provided for guiding the flow of outside air sucked into the heating chamber from the vent hole to the lower portion of the heating chamber.

  According to the engine working machine of the present invention, since water (rain water) that has entered the casing and accumulated in the oil barrier is heated by the heating means, evaporation is accelerated. It can be eliminated during operation of the work equipment.

It is explanatory drawing which shows the 1st example of an engine working machine of this invention. It is a circuit diagram of a heating means similarly. It is explanatory drawing which shows the 2nd example of an engine working machine of this invention. It is a circuit diagram of a heating means similarly. It is explanatory drawing which shows the 3rd form example of the engine working machine of this invention. It is a circuit diagram of a heating means similarly. It is explanatory drawing which shows the 4th example of an engine working machine of this invention. It is explanatory drawing which shows the 5th example of an engine working machine of this invention.

  First, the engine working machine 10 is a casing 11 having a soundproof structure in which a working machine 12 such as a generator, a compressor, and a hydraulic unit and a diesel engine 13 that drives the working machine 12 are housed. An oil breakwater 14 is integrally provided at the lower portion of the casing 11 to prevent oil such as fuel leaked from the engine from flowing out. Fuel is supplied to the diesel engine 13 from a built-in fuel tank housed in the casing 11 or an external fuel tank installed outside, and output from the work machine is output from an output section provided on the outer surface of the casing 11. The

  Further, the casing 11 is provided with an intake port 15 and an exhaust port 16. By the action of the radiator fan 18 of the radiator 17, outside air (air) is sucked into the casing 11 from the intake port 15, and the radiator 17 Air that has been heated by cooling the cooling water is discharged from the exhaust port 16 to the outside.

  The oil breakwater 14 is a box-shaped opening on the upper casing 11 side, and the oil breakwater 14 is sucked into the casing 11 together with outside air from the intake port 15 during operation of the engine work machine 10. In order to drain water from the inside of the oil barrier 14 near the bottom of the side plate of the oil barrier 14, for example, the accumulated rainwater and the dew condensation water generated in the casing 11 while the operation of the engine work machine 10 is stopped are collected. A drain cock 19 is provided.

  In the engine work machine 10 shown in the first embodiment in FIGS. 1 and 2, a partition plate 21 is provided inside the oil breakwater 14 to partition the heating chamber 22 in the oil breakwater 14, and the heating chamber 22. A heating means 23 is disposed inside. The partition plate 21 is provided in an inclined state so that the side plate 14a side of the oil breakwater 14 is high and the inner side of the oil breakwater 13 is low, and the heating chamber 22 includes the side plate 14a, bottom plate 14b, and The partition plate 21 has a triangular cross section.

  Between the lower end portion 21a in the inclination direction of the partition plate 21 and the bottom plate 14b, which is the lower part of the heating chamber 22, a liquid inlet 24 is provided for communicating the lower part of the heating chamber 22 into the oil barrier 14. 14 a is opened to the highest position of the oil barrier 14 where the upper end 21 b in the inclination direction of the partition plate 21 which is the upper part of the heating chamber 22 is in contact with the upper portion of the heating chamber 22 and the outside of the oil barrier 14. A vent 25 with a hood is provided. The height of the air vent 25 is set based on the amount of leakage of fuel, lubricating oil, etc., and even if fuel etc. leaks from the diesel engine 13, the fuel etc. do not flow out from the air vent 25 to the outside. Is formed.

  The heating means 23 uses a heat exchanger 26 that uses thermal energy of engine cooling water, which is one of waste heat of the diesel engine 13, and becomes high temperature by cooling the diesel engine 13. The engine cooling water is cooled by the radiator inflow pipe 27 that flows toward the radiator 17 and the inflow side 26 a of the heat exchanger 26, the outflow side 26 b of the heat exchanger 26, and the radiator 17. The heat exchanger outflow pipe 30 is connected to the radiator outflow pipe 29 where the engine cooling water returns to the diesel engine 13.

  The heating means 23 is provided with a water temperature meter 31 for measuring the temperature of the water flowing on the outflow side 26 b of the heat exchanger 26 and the water temperature measured by the water temperature meter 31 provided in the heat exchanger inflow pipe 28. Is provided with an on-off valve 32 that is closed when the temperature exceeds a preset temperature (set temperature). The set temperature is set on the basis of the flash point of the liquid having the lowest flash point among the liquids accumulated in the oil barrier 14, usually the flash point of diesel fuel. When the flash point is 45 ° C. or higher, it is preferable that the set temperature is less than 45 ° C. and is set to about 40 ° C. in consideration of safety.

  The heating means 23 formed in this way has a temperature of 40 ° C. measured by the water thermometer 31 when the water temperature measured by the water thermometer 31 is equal to or lower than the set temperature, for example, when the set temperature is 40 ° C. Since the on-off valve 31 is kept open until the temperature exceeds the temperature, a part of engine cooling water circulated by a water pump (not shown) is diverted from the radiator inflow pipe 27 to the heat exchanger inflow pipe 28, Through the exchanger 26, the heat exchanger outflow pipe 30 circulates and merges with the engine coolant in the radiator outflow pipe 29. Further, when the temperature of the hot water measured by the water temperature gauge 31 exceeds 40 ° C., the on-off valve 32 is closed and the flow of engine cooling water to the heat exchanger 26 is shut off. Thus, the heat exchanger 26 is heated to about 40 ° C. during the operation of the engine work machine 10.

  At this time, in the case where water (intrusion water) such as rain water or dew condensation water is accumulated in the oil barrier 14, the intrusion water that has flowed into the heating chamber 22 through the liquid passage port 24 enters the heat exchanger 26. Heat is exchanged with flowing water (hot water) to be heated to about 40 ° C., and the vapor pressure of the intrusion water is increased to promote the evaporation of the intrusion water. The vapor evaporated from the intrusion water is discharged to the outside from the vent hole 25.

Therefore, in a normal use state of the engine work machine 10, a large amount of rainwater hardly enters the casing 11 at all times, and a large amount of intrusion water does not accumulate in the oil barrier 14. During the operation, water can be kept in the oil breakwater 14. Accordingly, it is not necessary to frequently perform the drain operation for opening the drain cock 19 and discharging the intrusion water in the oil barrier 14, and the cycle for performing the drain operation can be extended. In addition, in the control unit 33, the heat exchanger The set temperature of 26 is set to a temperature below the flash point of diesel fuel, for example, 40 ° C., and when the hot water temperature of the heat exchanger 26 measured by the water thermometer 31 exceeds 40 ° C., the on-off valve 32 is closed to perform heat exchange. Since the temperature of the vessel 26 does not rise above the flash point of the diesel fuel, even if the diesel fuel leaks from the diesel engine 13, there is no risk that the diesel fuel will ignite and burn.

  In the second embodiment shown in FIGS. 3 and 4, the connection position of the heat exchanger inflow pipe 28 is replaced with the radiator 17 which is the most upstream part of the radiator outflow pipe 29 in place of the radiator inflow pipe 27 in the first embodiment. An example of an exit part is shown. In the following description, the same components as those of the engine working machine shown in the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the present embodiment, a part of the engine cooling water flowing out from the radiator 17 to the radiator outlet pipe 29 is diverted to the heat exchanger inflow pipe 28, and heat exchange is performed through the heat exchanger 26 in the same manner as in the first embodiment. The heat exchanger 26 is circulated and merged with the engine cooling water in the radiator outlet pipe 29 from the radiator outlet pipe 30 to keep the heat exchanger 26 heated to a predetermined temperature. Thereby, the intrusion water accumulated in the heating chamber 22 can be heated and evaporated by the heat exchanger 26, and the intrusion water in the oil barrier 14 can be eliminated in the same manner as described above.

  The third embodiment shown in FIGS. 5 and 6 shows an example in which an electric heater 42 provided with a thermostat 41 is used as the heating means 23. The electric heater 42 uses a battery 43 of the diesel engine 13 or a part of the output of the generator when the working machine 12 is a generator, and the set temperature of the thermostat 41 is Similarly to the set temperature of the control unit 33, the temperature is set to, for example, 40 ° C. below the flash point of diesel fuel, and the temperature of the electric heater 42 is maintained at about 40 ° C. by the action of the thermostat 41. As a result, the intrusion water in the oil breakwater 14 flows into the heating chamber 22 from the liquid flow port 24 and is heated to about 40 ° C. by the electric heater 42, and evaporates as the vapor pressure rises. Is excluded from the outside.

  The fourth embodiment shown in FIG. 7 shows a structure for quickly discharging the vapor evaporated from the ingress water from the heating chamber 22 to the outside. In the present embodiment, an opening provided with an opening / closing member 51 that opens only when the inside of the casing 11 becomes negative pressure and allows the inside of the heating chamber 22 and the inside of the casing 11 to communicate with each other at the upper part of the heating chamber 22. In addition, an example in which an air conditioning plate 53 that guides the flow of outside air sucked from the vent hole 25 to the lower part of the heating chamber 22 is provided.

  The opening / closing member 51 is made of a flexible rubber plate or a lightweight metal plate. When the engine working machine 10 is stopped and the inside of the casing 11 and the heating chamber 22 are all at atmospheric pressure, the opening / closing member 51 is. The opening 52 is closed by its own weight or elasticity, and the radiator fan 18 is activated in accordance with the operation of the engine work machine 10. When the inside of the casing 11 becomes negative pressure by the air blowing action of the radiator fan 18, The opening / closing member 51 is pushed upward by the pressure difference between the pressure in the heating chamber 22 that is atmospheric pressure in communication with the outside air through the port 25 and the pressure in the casing 11 that has become negative pressure. Is formed in an open state.

  Accordingly, during the operation of the engine work machine 10, the opening 52 is in an open state as shown in FIG. 7A, and therefore, the heating chamber 22 is heated from the vent 25 by the action of the radiator fan 18. A flow of air is formed in which the outside air (air) sucked into the chamber 22 flows into the casing 11 through the open opening 52. By forming such an air flow, the vapor evaporated from the intrusion water can be quickly discharged from the heating chamber 22 along with the air flow, so that the partial pressure of water vapor in the heating chamber 22 is reduced. Lowering can promote evaporation of invading water.

  Further, by providing the air conditioning plate 53, the outside air sucked from the vent 25 can be blown to the surface of the intruding water accumulated in the lower part of the heating chamber 22, so that the evaporation of moisture on the surface of the intruding water is performed. Can be further promoted, and intrusion water in the oil breakwater 14 can be effectively eliminated.

  Further, when the engine work machine 10 is stopped, as shown in FIG. 7B, the opening / closing member 51 automatically closes the opening 52, and the steam in the heating chamber 22 flows into the casing 11. Therefore, it is possible to prevent equipment such as the diesel engine 13 and the work machine 12 from being corroded by moisture. Furthermore, by providing the through hole 53 a in the upper part of the air conditioning plate 53, the air permeability in the heating chamber 22 can be ensured, so that the vapor evaporated by the preheating of the heating means 23 is trapped in the heating chamber 22. Can be prevented.

  The fifth embodiment shown in FIG. 8 shows an example in which an internal fan 61 is provided in the partition plate 21 and an external fan 62 is provided in the vent 25 so that the inside of the heating chamber 22 is forcibly ventilated. ing. The internal fan 61 operates during the operation of the engine work machine 10 and forcibly exhausts the air containing the vapor in the heating chamber 22 from the heating chamber 22 into the casing 11, so that the heating chamber 22 has the above-described inside. The air flow similar to that of the fourth embodiment is more effectively formed to promote the evaporation of intrusion water. One external fan 62 starts operating immediately after the operation of the engine work machine 10 is stopped, and discharges air containing the steam in the heating chamber 22 from the inside of the heating chamber 22 to the outside. Is surely prevented from flowing into the casing 11 and steam from being trapped in the heating chamber 22. This external fan 62 is provided with a timer, and after operating until the amount of steam (humidity) in the heating chamber 22 decreases or until the temperature of the heating means 23 decreases near the ambient temperature, It is configured to stop automatically.

  In this way, the intrusion water is heated and evaporated by the heating means 23 provided in the oil breakwater 14, and the evaporated vapor is removed from the oil breakwater 14 and the casing 11. Accumulation of rainwater can be suppressed, the period of drainage operation by the drain cock 19 can be extended, or drainage operation can be made unnecessary. Further, the heating source of the heating means 23 is not limited to the engine cooling water and the electric heater, but diesel engine lubricating oil, exhaust gas, return fuel, and combustion air compressed by a supercharger can be used. Compressed air that has been compressed by a compressor, which is a machine, and heated, hydraulic oil of a hydraulic unit, or the like can also be used as a heating source. Furthermore, by forming the heating chamber 22 in the oil breakwater 14 by the partition plate 21, the evaporated steam is not trapped in the casing 11, and the diesel engine 13 and the work machine 12 can be protected from moisture. .

  In addition, the shape of the heating chamber is arbitrary, and if the air permeability inside these can be sufficiently secured due to the size and structure of the oil breakwater and the casing, it is not necessary to form the heating chamber in the oil breakwater. Good.

  DESCRIPTION OF SYMBOLS 10 ... Engine working machine, 11 ... Casing, 12 ... Working machine, 13 ... Diesel engine, 14 ... Oil barrier, 14a ... Side plate, 14b ... Bottom plate, 15 ... Inlet, 16 ... Exhaust, 17 ... Radiator, 18 ... Radiator fan, 19 ... Drain cock, 21 ... Partition plate, 21a ... Inclination direction lower end, 21b ... Inclination direction upper end, 22 ... Heating chamber, 23 ... Heating means, 24 ... Liquid inlet, 25 ... Vent, 26 ... Heat exchanger, 26a ... inflow side, 26b ... outflow side, 27 ... radiator inflow pipe, 28 ... heat exchanger inflow pipe, 29 ... radiator outflow pipe, 30 ... heat exchanger outflow pipe, 31 ... water thermometer, 32 ... opening and closing Valve 33, control unit 41, thermostat 42, electric heater 43, battery 51, opening / closing member 52, opening 53, air conditioning plate 53 a, through-hole 61, internal fan 62, external fan

Claims (6)

In an engine working machine in which a working machine and a diesel engine that drives the working machine are housed in a casing, and an oil breakwater is provided at a lower portion of the casing, water accumulated in the oil breakwater is provided in the oil breakage bank. Rutotomoni provided with a heating means for evaporating, the maximum temperature of the heating means, an engine working machine characterized in that it is set to a temperature below the flash point of the diesel fuel. 2. The engine operation according to claim 1, wherein the heating means uses at least one of cooling water, lubricating oil, exhaust gas, return fuel, and air compressed by a supercharger of the diesel engine as a heating source. Machine. The engine working machine according to claim 1, wherein the heating means uses an electric heater as a heating source. The heating means is disposed in a heating chamber partitioned by a partition plate that divides the inside of the oil barrier, the heating chamber includes a liquid passage opening that communicates a lower portion of the heating chamber with the oil barrier, and an upper portion of the heating chamber. The engine working machine according to any one of claims 1 to 3 , further comprising a vent hole that communicates with the outside of the oil barrier . The engine working machine according to claim 4, wherein an opening / closing member that opens only when the inside of the casing becomes negative pressure and communicates the inside of the heating chamber and the inside of the casing is provided at an upper portion of the heating chamber . 6. The engine work according to claim 5, further comprising an air conditioning plate that guides a flow of outside air sucked from the vent and flowing into the casing through the opening and closing member into the lower portion of the heating chamber. Machine.

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