JP5628052B2 - Engine working machine - Google Patents

Description

  The present invention relates to an engine working machine, and more specifically, an engine in which a working machine such as a generator or a compressor, an engine that drives the working machine, and a fuel tank that stores fuel of the engine are housed in a casing. It relates to work equipment.

  At construction sites, civil engineering sites, disaster sites, and evacuation centers, portable engine machines that drive various working machines such as generators, compressors, and hydraulic units are operating. As such an engine working machine, a machine in which various devices such as a working machine, an engine, and a fuel tank are housed in a casing having a soundproof structure is widely used. In addition, in order to prevent fuel or the like from flowing out of the engine working machine, there is known a structure in which an oil guard (oil guard) containing a large-capacity fuel tank is stacked on the lower part of the casing. (For example, refer to Patent Document 1).

JP 2008-274922 A

  However, in the above-mentioned patent document, since the engine working machine is stacked on the upper part of the oil guard, the position of heavy objects such as the engine and the generator is increased, and the center of gravity of the engine working machine including the oil guard is increased. The position becomes high. In particular, large engine working machines with large engines and generators and large-capacity fuel tanks need to have a higher oil guard, which makes them unstable compared to small engine working machines. There is. For this reason, vibration is likely to occur during operation, which adversely affects various devices and piping. Also, if the bottom area is increased, the height of the oil guard can be reduced, but it is difficult to increase the bottom area due to dimensional restrictions during transportation and use.

  Accordingly, an object of the present invention is to provide an engine working machine provided with an oil guard that prevents leaked fuel and the like from flowing out to the outside without increasing the position of the center of gravity of the engine working machine.

  In order to achieve the above object, an engine work machine according to the present invention divides an interior of a casing having a pair of base frames on both sides of a lower part with a partition wall to divide into an exhaust chamber and an engine chamber, and And a working machine driven by the engine, and an engine working machine in which a fuel tank is arranged at a lower part of the exhaust air chamber, a first oil guard is provided at a lower part of the exhaust air chamber, A second oil guard is provided between the base frames, and the side wall of the first oil guard is raised above the base frame to surround the fuel tank, and the side wall of the second oil guard is the base frame. And the liquid level in the first oil guard is higher than a preset height at the upper part of the side wall of the first oil guard. To, is characterized by comprising an overflow section for flowing down the liquid of the first oil in the guard to the second oil within the guard.

  Further, in the engine work machine according to the present invention, the overflow portion is continuous with the overflow opening portion in which the upper edge of the second oil guard side wall is cut out and the opening edge of the overflow opening portion. A recumbent portion projecting toward the oil guard, and a reed portion bent from the projecting end of the recumbent portion into the second oil guard below, wherein the recumbent portion includes the engine and the fuel tank. And the second oil guard detects that the liquid level in the second oil guard has exceeded a preset height. It is characterized by having a level sensor.

  According to the engine working machine of the present invention, the first oil guard that surrounds the lower half of the fuel tank is disposed in the lower part of the exhaust chamber, and the second oil guard that is not more than the height of the base frame is disposed between the base frames in the lower part of the engine chamber. Since it is provided, the oil guard can be housed in the casing, and the center of gravity of the engine working machine is not increased by the oil guard. Therefore, the stability of the engine working machine can be improved compared to the case where the oil guard is provided on the lower part of the casing, and vibration during operation can be suppressed to a low level. Furthermore, since the overflow part for flowing down the liquid in the first oil guard into the second oil guard is provided, even if the height of the first oil guard is lowered, the first fuel leakage from the fuel tank or the like occurs. It can be received by the oil guard and the second oil guard.

It is a principal part front view of the engine working machine which shows one example of this invention. It is a principal part top view of an engine working machine similarly. It is a principal part side view of an engine working machine similarly. It is explanatory drawing of a 1st oil guard and a fuel tank similarly. It is explanatory drawing of a 1st oil guard, a fuel tank, and a 2nd oil guard similarly. It is a perspective view of the 1st oil guard similarly. It is a sectional view of the 2nd oil guard similarly.

  The engine working machine 11 shown in the present embodiment is a portable engine generator that drives a generator by an engine (not shown), and a casing 12 having a soundproof structure is erected on a floor base 13. The partition wall 14 divides the exhaust chamber 15 and the engine chamber 16. The floor 13 is formed by a pair of base frames 13a provided in the longitudinal direction, and an equipment support member 13b spanning the upper parts of the base frames 13a. An engine or a generator is mounted on the equipment support member 13b. It is supported. Further, the partition wall 14 is provided at a position of about 1/4 with respect to the longitudinal direction of the casing 12, and the size of the exhaust air chamber 15 is about 1/4 of that of the casing 12. On the other hand, the size is about 1/3.

  The exhaust chamber 15 has a duct structure for discharging the warm air that has passed through the radiator provided in the partition wall 14 from the exhaust port provided in the top plate of the casing 12. The partition plate 15a partitions the upper duct portion 15b and the lower fuel tank storage portion 15c. The fuel tank housing portion 15 c is provided with a fuel tank 17 and a first oil guard 18 surrounding the lower half of the fuel tank 17. Various devices such as a generator, an engine, a radiator, and a control panel are disposed in the engine chamber 16, and a second oil guard 19 is provided below the engine chamber 16. A fuel supply pipe 20a and a fuel return pipe 20b, which are a pair of fuel pipes, are provided between the engine and the fuel tank 17.

  The first oil guard 18 has a bottom surface and side surfaces that are sealed by a rectangular bottom plate 18a having a size that fits between both base frames 13a and four side plates 18b that rise from the four sides of the bottom plate 18a. It is formed in a box shape, and is provided in a state where the bottom plate 18a is sandwiched between the base frames 13a so as to close the lower end of the exhaust chamber 15. The side plate 18b rises above the upper surface of the base frame 13a and surrounds the fuel tank 17, and a space for storing fuel leaked from the fuel tank 17 is interposed between the fuel tank 17 and the side plate 18b. Is provided.

  In addition, on the upper part of the side plate 18b located on the second oil guard 19 side, when the liquid level in the first oil guard 18 exceeds a preset height, the liquid ( An overflow portion 21 for allowing fuel to flow down into the second oil guard 19 is provided. The overflow portion 21 includes an overflow opening portion 21a formed by cutting out the upper edge of the side plate 18b on the second oil guard 19 side, and the second oil guard 19 continuous to the opening edge of the overflow opening portion 21a. A horizontal flange 21b protruding to the side, and a vertical flange 21c bent from the protruding end of the horizontal flange 21b into the second oil guard 19 below. The bottom plate 18a is provided with a first drain 22a for extracting the liquid in the first oil guard 18, and a fuel tank drain 22b for extracting the fuel in the fuel tank 17 passes through the bottom plate 18a. Is provided.

  The volume of the first oil guard 18 and the height of the overflow portion 21 are set according to the volume and shape of the fuel tank 17. Normally, the fuel from the lower part of the fuel tank 17 into the first oil guard 18. Is leaked, the liquid level in the fuel tank 17 and the liquid level in the first oil guard 18 are balanced, and the liquid level in the first oil guard 18 is lower than the overflow portion 21. It is preferable to set so that Thereby, when the fuel leaks from the fuel tank 17 due to damage or corrosion of the fuel tank 17, the fuel can be stored only by the first oil guard 18. Further, the height of the side plate 18b and the height of the overflow portion 21 are the same as those in the overflow portion 21 even when the engine working machine is installed in an inclined state so that the overflow portion 21 side is elevated within the allowable range. The fuel is set so as not to overflow outside beyond the upper edge of the opposing side plate 18b.

  On the other hand, the second oil guard 19 has a bottom and side surfaces hermetically sealed by a rectangular bottom plate 19a having a size that fits between both base frames 13a and four side plates 19b that rise from the four sides of the bottom plate 19a. The bottom plate 19a is sandwiched between the base frames 13a so as to close the lower end of the engine chamber 16 and at least the lower part of the equipment such as the engine or radiator that may cause liquid leakage. It is provided in the state. The height of the side plate 19b is formed to be equal to or less than the height of the base frame 13a, and the entire second oil guard 19 is formed so as to fit inside the floor base 13 below the device support member 13b. Further, a level sensor 23 and a second drain 24 are provided in the vicinity of the side plate 19b on the short side of the second oil guard 19, respectively.

  The volume of the second oil guard 19 is limited by the distance (width dimension) between the base frames 13a, the height (height dimension) of the base frame 13a, and the longitudinal dimension (length dimension) of the engine compartment 16. The length of the side plate 19b in the second oil guard 19 is less than the height of the base frame 13a because the length is larger than that of the exhaust chamber 15 and there is no fuel tank inside. A sufficiently large volume can be ensured.

  On the upper surface of the fuel tank 17 fixed to the bottom plate 18 a of the first oil guard 18, a fuel supply port 17 a is projected, and a fuel supply pipe 20 a and a fuel return pipe 20 b are respectively connected. A level gauge 25 is attached to the outer surface. The fuel supply pipe 20a and the fuel return pipe 20b pass from the upper part of the first oil guard 18 through the overflow opening part 21a of the overflow part 21, pass through the lateral flange part 21b, and further pass through the upper part of the second oil guard 19 to the engine. Connected to the fuel injector.

  In the engine working machine 11 formed in this way, when fuel leaks from the fuel tank 17 due to corrosion or the like, the leaked fuel is stored in the first oil guard 18, and the liquid level of the fuel in the fuel tank 17. When the fuel level in the first oil guard 18 becomes the same, the fuel leakage from the fuel tank 17 to the first oil guard 18 stops and the fuel flows out of the engine working machine 11. There is nothing. In this state, the fuel remaining in the fuel tank 17 can be recovered from the fuel tank drain 22b, and the fuel leaked into the first oil guard 18 can be recovered from the first drain 22a to an external recovery container.

  On the other hand, when the fuel return pipe 20b breaks in the vicinity of the fuel tank 17 and the fuel leaks out, the fuel leaks continuously from the fuel return pipe 20b while the engine is running, so the fuel in the fuel tank 17 runs out. The fuel will continue to leak until the engine stops. Therefore, if fuel leaks from the fuel return pipe 20b when the fuel tank 17 is full or nearly full, the entire amount of leaked fuel cannot be stored in the first oil guard 18, and the first oil guard The fuel level in the fuel 18 gradually rises toward the upper end of the first oil guard 18. When the liquid level in the first oil guard 18 becomes higher than the overflow portion 21, the fuel flows down from the overflow portion 21 into the second oil guard 19 and exceeds the amount that can be stored in the first oil guard 18. The fuel is stored in the second oil guard 19.

  As described above, the fuel leaked from the fuel return pipe 20b is stored in the first oil guard 18 and the second oil guard 19, so that the fuel does not flow out of the engine working machine 11. The fuel in the first oil guard 18 can be extracted from the first drain 22 a as described above, and the fuel in the second oil guard 19 can be extracted from the second drain 24.

  In addition, when fuel, cooling water, or lubricating oil leaks in the engine compartment 16, it is normally stored in the second oil guard 19 having a large volume and is prevented from flowing out to the outside. However, when the volume of the fuel tank 17 is larger than the volume of the second oil guard 19, when a fuel leak and a coolant leak occur at the same time, or when the engine work machine 11 is installed in an inclined state, There is a possibility that fuel or the like may flow out of the engine work machine 11 beyond the side plate 18 b of the second oil guard 19. In order to cope with this, a level sensor 23 for detecting that the liquid level exceeds a preset height is provided in the second oil guard 19, and the engine is detected when the level sensor 23 detects a rise in the liquid level. Is preferably set to automatically stop.

  When the engine is stopped, the fuel supply from the fuel tank 17 to the engine is stopped, so that a large amount of fuel does not leak into the second oil guard 19 and the second oil guard 19 overflows with fuel or cooling water. Can be prevented. In particular, by providing the level sensor 23 at two corners that are opposite to the second oil guard 19, even if the engine work machine 11 is installed in an inclined state within an allowable range, the second oil The rise in the liquid level in the guard 19 can be reliably detected, and the liquid such as fuel can be more reliably prevented from flowing out of the engine work machine 11.

  In this way, the fuel tank 17 is accommodated in the lower part of the exhaust chamber 15, and the oil guard is placed in the floor base 13 at the lower part of the engine chamber 16 and the first oil guard 18 surrounding the lower half of the fuel tank 17. By dividing into the second oil guard 19 to be stored, the position of the center of gravity of the engine work machine 11 is likely to be higher as in the conventional engine work machine in which the oil guard is provided below the floor 13. Therefore, the stability of the engine work machine 11 is not impaired, the engine work machine 11 can be downsized and vibrations can be reduced, the durability of the engine work machine 11 is improved, and the engine work machine 11 is transported. The transportation cost at the time of carrying out can be reduced.

  Furthermore, it is necessary to separately form a fuel pipe insertion hole in the partition wall 14 or to prepare a holding member by using the horizontal flange portion 21b opened at the upper side as an insertion portion for the fuel supply pipe 20a and the fuel return pipe 20b. Therefore, the fuel pipe can be easily handled. Further, even when fuel leaks in the middle of the fuel supply pipe 20a or the fuel return pipe 20b, the fuel supply pipe 20a and the fuel return pipe 20b are placed above the first oil guard 18, the lateral flange portion 21b, and the second oil guard 19. Since it passes, it is possible to prevent leaked fuel from flowing out to the outside through a gap between the oil guards.

  In this embodiment, the generator is exemplified as the working machine. However, the working machine such as a compressor or a hydraulic unit can be similarly applied to an engine working machine driven by an engine. The arrangement of is arbitrary. Further, the overflow portion can be formed by a pipe other than being formed in a bowl shape as described above, and the fuel supply pipe 20a and the fuel return pipe 20b can be routed arbitrarily. The first oil guard and the second oil guard may be integrally formed in advance and fixed to the floor base, or the first oil guard and the second oil guard may be separately fixed to the floor base.

  DESCRIPTION OF SYMBOLS 11 ... Engine working machine, 12 ... Casing, 13 ... Floor base, 13a ... Base frame, 13b ... Equipment support member, 14 ... Partition wall, 15 ... Exhaust chamber, 15a ... Partition plate, 15b ... Duct part, 15c ... Fuel Tank compartment, 16 ... engine chamber, 17 ... fuel tank, 17a ... filler port, 18 ... first oil guard, 18a ... bottom plate, 18b ... side plate, 19 ... second oil guard, 19a ... bottom plate, 19b ... side plate, 20a ... Fuel supply pipe, 20b ... Fuel return pipe, 21 ... Overflow part, 21a ... Overflow opening, 21b ... Recumbent part, 21c ... Vertical saddle part, 22a ... First drain, 22b ... Drain for fuel tank, 23 ... Level sensor 24 ... second drain 25 ... level gauge

Claims (4)

The inside of the casing having a pair of base frames on both sides of the lower part is partitioned by a partition wall to divide into an exhaust chamber and an engine chamber, and an engine and a work machine driven by the engine are arranged in the engine chamber, In the engine working machine in which a fuel tank is disposed at a lower portion of the exhaust chamber, a first oil guard is provided at a lower portion of the exhaust chamber, and a second oil guard is provided between a base frame at the lower portion of the engine chamber. The side wall of the oil guard is raised above the base frame so as to surround the fuel tank, and the side wall of the second oil guard is set to be equal to or less than the height of the base frame, and is located above the side wall of the first oil guard. When the liquid level in the first oil guard exceeds a preset height, the liquid in the first oil guard is removed from the second oil guard. Engine working machine, characterized by comprising an overflow portion to flow down within. The overflow portion includes an overflow opening portion in which an upper edge of the second oil guard side sidewall is cut away, and a lateral ridge portion that protrudes toward the second oil guard side continuously to the opening edge of the overflow opening portion; 2. The engine working machine according to claim 1, further comprising a vertical saddle portion bent from the protruding end of the horizontal saddle portion toward the inside of the second oil guard below. The engine working machine according to claim 2 , wherein the recumbent portion also serves as a fuel pipe insertion portion provided between the engine and the fuel tank.
The said 2nd oil guard is provided with the level sensor which detects that the liquid level in this 2nd oil guard exceeded the preset height, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. Engine working machine described in the section.

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