JP5881643B2 - Rain drainage device for engine working machines - Google Patents

Description

  The present invention relates to an engine working machine in which a working machine body such as an engine-driven welder, generator, compressor, etc. is disposed in a casing, and drainage of engine working machine for discharging rainwater that has entered from outside to the outside of the machine. It relates to the device.

  On site such as road construction, an engine work machine in which a work machine body such as an engine-driven welder, generator, compressor, etc. is arranged in a casing is operating. In such an engine work machine, rainwater may enter inside through a clearance of the maintenance inspection door, etc. If such water is generated and water accumulates in the machine, it may cause a failure of the work machine. . Therefore, the engine working machine has a rainwater discharge device for discharging the infiltrated rainwater to the outside.

  FIG. 7 is a diagram illustrating an example of a conventional rainwater discharge device for an engine working machine. This rainwater discharge device is applied to, for example, a cogeneration device, and the bottom portion of the housing has a double structure including an outer bottom plate 21 that forms an outer bottom portion and an inner bottom plate 22 that is overlaid on the outer bottom plate 21. ing. The outer bottom plate 21 is bent so that a part thereof is raised to form an upper portion 23, and the upper portion 23 is provided with an outer water drain hole 24 that can guide water in the housing to the outside of the housing. It has been. On the other hand, the inner bottom plate 22 is bent so that a part thereof is lowered, and a lower portion 25 is formed. The lower portion 25 is coaxial with the outer drain hole 24 and has a smaller diameter than the outer drain hole 24. An internal water drain hole 26 is provided.

  And the water dripped in the housing is collected in the lower portion 25 formed low, and is discharged to the outside from the inner water drain hole 26 provided there through the outer water drain hole 24. In addition, since the outside drain hole 24 is provided in the upper portion 23 formed high on the outer bottom plate 21 and has a small diameter, rainwater and the like can be prevented from entering the casing from the outside drain hole 24.

JP 2012-154207 A

  However, in the above conventional rainwater discharge device, when the cooling fan is operated to cool the engine radiator or the like in the work machine, if the air intake area is small, the inside of the machine becomes negative pressure, and the drain hole that leads to the outside of the machine Has become a problem of inhaling air, preventing water from escaping and sucking dust into the aircraft. In addition, if the drain hole leading to the outside of the machine is small, water cannot be drained by surface tension, and if it is large, the water can be easily drained, but there is also a problem that noise inside the machine leaks to the outside.

  SUMMARY OF THE INVENTION The present invention has been made in view of such problems, and it is an object of the present invention to be able to discharge water even when the inside of the machine is under negative pressure, without sucking dust into the machine, and to make it difficult for the noise inside the machine to leak to the outside. It is.

In order to solve the above-mentioned problem, the invention according to claim 1 of the present application is directed to the lower side of the drainage hole that vertically penetrates the metal plate that separates the bottom of the machine from the outside of the machine, and the upper part of the through hole has a large diameter. A rainwater drain pipe having a small diameter portion with a small hole diameter at a lower portion and a length of the large diameter portion longer than that of the small diameter portion so that rainwater discharged from the machine can be stored inside . The upper end is watertightly attached so as to surround the drain hole.

The invention according to claim 2 of the present application is characterized in that, in the invention according to claim 1, a horizontal baffle plate is provided on the upper side of the drainage hole with an interval therebetween .

The present invention has the following effects.
That is, in the invention according to claim 1, below the drainage hole, the upper part of the through hole is a large diameter part with a large hole diameter, the lower part is a small diameter part with a small hole diameter, and the length of the large diameter part is Since the rainwater drain pipe, which is longer than the length of the small-diameter portion and is designed to be able to store rainwater discharged from the inside of the machine, is watertightly attached, the drainage of rainwater temporarily accumulates in the rainwater drain pipe. Even if the air pressure inside the aircraft becomes negative and the force of intake air into the aircraft works, rainwater is discharged outside the aircraft until the force balances with the weight of rainwater in the rainwater drain pipe. When the work machine is stopped, the negative pressure is eliminated and the intake force is lost. Therefore, all rainwater in the rainwater drain pipe is discharged outside the machine. In addition, since the lower end portion of the rainwater drain pipe has a small diameter, it is possible to prevent the in-machine noise from leaking outside without sucking dust into the machine.

In the invention according to claim 2, in the rain drainage device for an engine working machine according to claim 1, a horizontal baffle plate is provided above the drain hole so as to have a large negative pressure in the machine. Even if rainwater that is about to be discharged blows up from the drain hole, the baffle plate can prevent the rainwater from being scattered to the side of the leakage storage tank.

It is a figure which shows the flow of the rain water in the environment base which concerns on one Example of this invention. It is a figure which shows an example of an engine working machine. It is a figure which shows the base of an engine working machine. It is a figure which shows the environment base which concerns on one Example of this invention. It is a figure which shows a drain pipe and a baffle plate. It is a figure which shows the drain pipe which concerns on another Example. It is a figure which shows an example of the rain water discharge apparatus of the conventional engine working machine.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  As shown in FIG. 2, the engine work machine is provided with a casing 2 on a work machine base 1, and although not shown, a work machine body such as a generator and a welder, and the work machine body are provided in the casing 2. The engine that drives is stored. The casing 2 is provided with a door 3 for inspecting the inside and performing maintenance work.

  Although not shown, a cooling fan is provided inside the casing 2, and the cool air from the cooling fan is cooled to the outside through the air exhaust port 6 after cooling the engine and the radiator of the engine. The The cooling air is taken in from the intake ports 4 and 5 provided at various locations of the casing 2.

  Such engine working machines are operating at road construction sites, etc., but such engine working machines use a large amount of fuel and engine oil internally, and those fuels and If engine oil leaks outside, it will harm the surrounding environment. Therefore, as shown in FIG. 1, the work machine base 1 of the engine work machine is placed on the environment base 10 having the leakage storage tank 11, and fuel and engine oil leak from the engine and the work machine body. However, by storing them in the leakage storage tank 11, fuel, engine oil, etc. are prevented from leaking outside. For the sake of explanation, FIG. 1 shows only the part related to the present invention, 12 is a discharge port for discharging the fuel and engine oil accumulated in the leaked substance storage tank 11 to the external container, and 13 is the inside of the machine It is a drainage hole for draining rainwater that has entered the basin.

  The prismatic mounting parts before and after the environmental base 10 are wider than the work machine base 1, and the upper edge of the leakage storage tank 11 protrudes above the upper surface of the environmental base 10. ing. Therefore, a groove having a concave section is formed by the upper surface of the mounting portion of the environment base 10, the work machine base 1, and the leakage storage tank 11. In addition, drain holes 13 are provided at both ends of the upper surface of the mounting portion of the environmental base 10 for allowing rainwater to flow down. The rainwater that has entered the working machine through the gaps of the door 3 (FIG. 2), as shown by dotted lines in FIG. 1, is the upper surface of the mounting portion of the environmental base 10, the working machine base 1, and the leakage storage tank. 11 is led to the drain holes 13 and 13 through the groove formed by the channel 11 and discharged outside the machine. In addition, although not shown in the figure, the U-shaped lower surface of the work machine base and the upper surface of the mounting portion of the environment base are connected by bolts and integrated, so that they can be carried on a truck or the like only by being suspended by the hanging bracket of the casing. In addition, by attaching a wheel to the lower surface of the environment base, it can be freely moved as a unit on site.

  FIG. 3 is a diagram showing a base of the engine working machine. FIG. 3 shows the work machine base in a plan view, a front view, and a side view. The code | symbol 1 respond | corresponds to the thing of FIG. 1, 7 and 8 are a water-receiving board, 9 is a side surface drain hole. On the left and right sides of the work machine base 1, there are provided water receiving plates 7 and 8 for receiving rainwater entering from the air inlet 4 and the air outlet 6 shown in FIG. ing.

FIG. 4 is a diagram illustrating an environment base according to an embodiment of the present invention. FIG. 4 shows the environment base in a plan view, a front view, and a side view. Reference numerals 10 to 13 correspond to those in FIG. 1, and reference numeral 14 denotes a baffle plate. The baffle plate 14 is horizontally disposed above the drain hole 13 with a gap therebetween, and even if the negative pressure in the machine becomes too large, the rainwater to be discharged may blow up from the drain hole 13. This is for preventing the leakage storage tank 11 from splashing.

  FIG. 5 is a view showing a drain pipe and a baffle plate, FIG. 5 (A) is a plan view, FIG. 5 (B) is a sectional view taken along line XX in FIG. 5 (A), and FIG. It is -Y sectional drawing. Reference numerals 11 to 15 correspond to those in FIG.

  A drainage hole 13 for discharging rainwater that has entered the machine is provided on the upper surface of the environment base 10, and the upper end of the rainwater drain pipe 15 is attached to the lower side of the drainage hole 13 in a watertight manner. The rainwater drain pipe 15 is made of a steel bar such as carbon steel for machine structure or free-cutting steel with a through-hole having a large inner diameter as a large-diameter portion 15a, followed by a through-hole with a small inner diameter and a small-diameter portion 15b. The large-diameter portion 15a side is the drainage hole 13 side, and the drainage hole 13 is surrounded so as to be watertightly attached by continuous welding.

  The rainwater drain pipe 15 has a good ratio by making the ratio of the hole diameter of the large diameter portion and the hole diameter of the small diameter portion 2: 1 or more and making the length of the large diameter portion longer than the length of the small diameter portion. It was confirmed that the drainage effect was obtained. Specifically, the rainwater drain pipe 15 has an outer diameter of 20 mm, a total length of 50 mm, an inner diameter of the large diameter portion of 13 mm, a length of 40 mm, an inner diameter of the small diameter portion of 6 mm, and a length of 10 mm. Obtained.

  Thus, since the small diameter part 15b was provided in the lower part of the rainwater drain pipe 15, the rainwater which flowed into the drainage hole 13 does not flow at a stretch after entering the large diameter part 15a of the rainwater drain pipe 15, and rainwater for a certain period. It remains in the drain pipe 15. Therefore, even if the inside of the machine becomes negative pressure during operation of the work machine and the force of intake air from outside into the machine works on the rainwater drain pipe 15, until the force and the weight of rainwater in the rainwater drain pipe 15 are balanced. Rainwater is discharged outside the aircraft. When the work machine is stopped, the negative pressure is eliminated and the intake force is lost. Therefore, all rainwater in the rainwater drain pipe 15 is discharged outside the machine. Further, since the inner diameter of the lower end portion of the rainwater drain pipe 15 is small, it is possible to prevent the inside noise from leaking outside without sucking dust into the machine.

  In addition, a horizontal baffle plate 14 is provided above the drain hole 13 with a gap therebetween. The base edge of the baffle plate 14 is fixed to the outside of the side wall of the leakage storage tank 11, and the bent pieces 14 a and 14 a on both sides of the distal end portion of the baffle plate 14 come into contact with the upper surface of the environmental base 10. Held in a horizontal position. As described above, even if such a baffle plate 14 causes the negative pressure in the machine to become too large and the rainwater to be discharged may blow up from the drain hole 13, It is possible to prevent scattering.

  FIG. 6 is a view showing a drain pipe according to another embodiment, which is shown in a front view and a side view. In this embodiment, a rainwater drain pipe is formed by attaching a rubber member 17 in the form of a vacuator valve to the tip of a metal pipe 16 having a through hole with a uniform inner diameter.

  The vacuator valve is usually attached to the lower part of the air cleaner of the engine and is used to discharge the dust that has been centrifuged by the air cleaner.It is made of rubber and has a funnel-like part below the circular mounting part. The slit-shaped discharge port is provided at the tip. In this embodiment, such a vacuator valve-like rubber member 17 is used.

  A rubber member 17 having a vacuator valve shape of a rainwater drain pipe shown in FIG. 6 has a mounting section 20 having a circular cross section at the upper end, and a funnel having a slit-shaped discharge port 18 at the tip below the mounting section 20. A shape portion 19 is provided. Such a vacuator valve-like rubber member 17 is attached to the tip of the pipe 16 to form a rainwater drain pipe, which is watertightly attached to the lower side of the drain hole 13 instead of the rainwater drain pipe 15.

  When water accumulates in the pipe 16, the slit-shaped discharge port 18 opens the slit-shaped discharge port 18 with the weight of water and discharges water. Further, even if the inside of the machine becomes negative pressure during operation of the work machine and the suction force from the outside acts on the slit-shaped discharge port 18, the suction force due to the negative pressure is the same as the rainwater drain pipe 15. Until the weight of the rainwater in the pipe 16 is balanced, the rainwater is discharged out of the machine. When the work machine is stopped, the negative pressure disappears and the intake force disappears, so the rainwater in the pipe 16 is discharged outside the machine. Further, since the vacuator valve-like rubber member 17 is attached to the lower end portion of the pipe, even if the inside of the machine becomes negative pressure, dust is not sucked into the machine, and noise inside the machine can be prevented from leaking outside.

  In each of the above-described embodiments, the drain hole 13 is provided on the upper surface of the environmental base 10. However, the present invention is not limited to this, and in a working machine provided with a bottom plate as shown in Patent Document 1, the bottom plate A drain hole may be provided on the surface.

DESCRIPTION OF SYMBOLS 1 Work implement base 2 Casing 3 Door 4, 5 Intake port 6 Exhaust port 7, 8 Water receiving plate 9 Side drain hole 10 Environmental base 11 Leakage storage tank 12 Discharge port 13 Drain hole 14 Baffle plate 15 Rainwater drain pipe 16 Pipe 17 Rubber member 18 Slit-shaped outlet 19 Funnel-shaped portion 20 Mounting portion

Claims (2)

Below the drainage hole that passes vertically through the metal plate that separates the bottom of the machine from the outside of the machine, the upper part of the through hole is a large diameter part with a large hole diameter, the lower part is a small diameter part with a small hole diameter, and the large diameter part The upper end of a rainwater drain pipe that is longer than the length of the small-diameter portion so that rainwater discharged from the machine can be stored therein is watertightly attached so as to surround the drainage hole. A rainwater discharge device for engine working machines. The rainwater discharge device for an engine working machine according to claim 1, wherein a horizontal baffle plate is provided above the drainage hole with a space therebetween .

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