JPS6118173Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement of the muffler of a soundproof engine working machine, and the purpose of this invention is to keep the exhaust outlet of the muffler open upward so that rainwater, etc. that enters through the exhaust outlet can prevent damage to the inside of the muffler and the work. The purpose is to prevent corrosion inside the machine.

In conventional engine machines, the exhaust outlet of the muffler opens upwardly to minimize emission of exhaust gas into the surrounding atmosphere. However, as a result of rainwater entering through this upward opening, it accumulates inside the muffler and, by extension, inside other engine-powered machines, promoting corrosion and shortening the life of the machine as a whole. The drawback was that the soot that had accumulated inside mixed with rainwater, etc., turned into ink-black water droplets, and blown up from the exhaust outlet, staining the surrounding area.

This invention solves the above drawbacks all at once.
In soundproof engine working machines that have a muffler storage room above the equipment room that houses the engine and work equipment, an exhaust outlet pipe is placed on the upper wall of the final expansion chamber of the muffler, and a water drain pipe is placed on the lower wall of the muffler. The exhaust outlet pipes are made to protrude side by side, and the exhaust outlet pipes are brought out of the work machine, and the water drain pipe is made to protrude into the drain port provided in the muffler storage chamber, and the water conduit pipe led from this drain port is routed through the equipment storage chamber to the outside of the work machine. The interior of the muffler is divided into four expansion chambers, and the overall length of the exhaust passage is long.By immediately discharging rainwater, etc. that entered the muffler from the exhaust outlet, it is possible to drain the inside of the muffler and work easily. Maximizes corrosion inside the machine, increases the durability of engine-powered machines, and improves noise reduction performance.
Furthermore, even if rainwater or the like accumulates in the muffler and soot mixes with the rainwater, black water droplets that look like black ink will not be blown up from the exhaust outlet.

Examples thereof will be described below with reference to the drawings.

1 and 2 show a soundproof engine generator. As shown in Fig. 2, the internal structure is such that a three-phase AC rotating field type synchronous generator 5 is interlocked and connected to the rear of a forced water-cooled vertical diesel engine 4, and these are connected to each other in a three-room soundproof case 1. It is supported in the equipment storage chamber 2 in a vibration-proof manner by vibration-proof rubber 25 . Then, the radiator fan 26 allows outside air to pass through the equipment storage chamber 2 from the rear to the front from the upper intake port 27 through the air suction chamber 28, ventilate and cool the equipment storage chamber 2, cool the radiator 29, and cool the equipment storage chamber 2. 30 and is discharged to the outside from discharge ports 31 and 32.
In addition, the built-in fan 33 of the generator 5 cools the generator 5 by passing outside air from the lower intake port 34 to the lower part of the equipment housing chamber 2 and from the air intake port 35 to cool the inside of the generator 5.
6 and is configured to be discharged to the outside. In the figure, 6 is a muffler, 38 is a fuel tank,
39 is a battery, 40 is a control device, 41 is an operation panel, and 42 is a terminal device for taking out electric power.

A muffler housing chamber 3 is provided above the equipment housing chamber 2, and a muffler 6 is housed therein. As shown in FIGS. 3 and 4, the internal structure of the muffler accommodation chamber 3 is such that an exhaust outlet 7 is provided on the upper wall 3a of the muffler accommodation chamber 3.
Drain ports 8 are provided in the lower wall 3b, and are arranged one above the other. Muffler 6-4
An exhaust outlet pipe 9 is provided on the upper wall 6a of the next expansion chamber 15, and a drain pipe 10 is provided on the lower wall 6b of the secondary expansion chamber 15, and these pipes are arranged vertically and protrude from each other. The exhaust outlet pipe 9 projects above the exhaust outlet 7, and the drain pipe 10 projects below the drain port 8. That is, the small-diameter drain pipe 10 is inserted into the large-diameter drain port 8 with an appropriate depth. On the other hand, a water conduit 11 extends downward from the drain port 8, passes through the inside of the equipment housing chamber 2, and is exposed to the outside of the lower wall 2a.

The muffler 6 has a horizontal cylindrical shape, and has a partition wall 22 inside.
A partition wall 23 is provided, and a primary expansion chamber 12 is formed below and a tertiary expansion chamber 14 is formed above in one side portion 24a. A secondary expansion chamber 13 is provided in the other side portion 24b, and a quaternary expansion chamber 15 is formed in the center portion 24c so as to be adjacent to the expansion chambers on both sides. The primary expansion chamber 12 and the secondary expansion chamber 13 are connected to the fourth expansion chamber 15.
The secondary expansion chamber 13 and the tertiary expansion chamber 14 are connected to each other by a primary communication pipe 16 that penetrates therethrough, and the secondary expansion chamber 13 and the tertiary expansion chamber 14 are connected to the fourth expansion chamber 1 as well.
A secondary communication pipe 17 passing through the inside of the main body 5 communicates with the other parts.

The tertiary expansion chamber 14 and the quaternary expansion chamber 15 are separated by the partition wall 2.
The fourth expansion chamber 15 communicates with the communication part 19 opened in 2.
An exhaust outlet pipe 9 is provided on the upper wall 15a of the
A drain pipe 10 passes through the lower wall 15b at a position below the exhaust outlet pipe 9.

In the quaternary expansion chamber 15, a partition frame 22 is provided at an appropriate position to the right of the exhaust outlet pipe 9 and slightly protrudes along the inner periphery of the muffler, so that rainwater etc. that have entered through the exhaust outlet pipe 9 undergo quaternary expansion. Even if it accumulates in the chamber 15, the partition frame 22 prevents it from entering the right side.

One end of an exhaust outlet pipe 18 directly connected to the exhaust port of the engine 4 is open in the primary expansion chamber 12, and the exhaust gas is muffled through each expansion chamber one after another and is discharged to the outside air from the exhaust outlet 7.

In addition, the code|symbol 20 is a sound-absorbing material.

The function of water drainage in the muffler of the engine working machine of the present invention will be explained below. When rainwater etc. enters through the horizontal opening of the exhaust outlet pipe 9, it immediately falls inside the muffler and drains water located below. The water reaches the pipe 10 and is discharged to the outside of the working machine via the water conduit 11 via the drain port 8 provided in the muffler storage chamber.

Also, to explain the function of the muffler, exhaust gas discharged from the exhaust port of the engine first enters the primary expansion chamber 12, enters the secondary expansion chamber 13 via the primary communication pipe 16, and then enters the secondary expansion chamber 13 via the primary communication pipe 16. It enters the tertiary expansion chamber 14 via 17. Thereafter, the air enters the quaternary expansion 15 at the center of the muffler via the communication part 19 opened at the top of the partition wall 22, and exits to the outside air through the exhaust outlet pipe 9.

Therefore, the following various effects can be achieved from the above structure and operation.

(1) Even if rainwater etc. enters the inside of the muffler from the horizontally opened exhaust outlet pipe 9, it is immediately removed from the drain pipe 10 located below to the drain port 8 and water conduit pipe 1.
Since rainwater is discharged to the outside of the engine working machine through the muffler and the working machine, rainwater does not accumulate inside the muffler and the working machine, preventing corrosion thereof and increasing its durability.

(2) Since rainwater, etc. does not accumulate inside the muffler, the soot adhering to the inside does not dissolve in this rainwater, etc. and turn into ink-like black droplets and blow out from the exhaust pipe 9. There will be no contamination at all.

In addition, even if rainwater accumulates in the muffler and soot mixes with the rainwater, the partition frame prevents the rainwater from spreading throughout the quaternary expansion chamber, reducing the space where the black droplets are generated. Along with narrowing the
Furthermore, the exhaust gas flowing from the tertiary expansion chamber into the 4th expansion chamber is made to flow above the 4th expansion chamber, thereby eliminating the black droplets on the lower wall of the 4th expansion chamber from being blown up, and preventing the black droplets from blowing up from the exhaust port. This prevents black droplets from blowing up.

(3) The structure for draining water such as rainwater from the muffler is simple: a drain pipe 10 is provided below the exhaust outlet pipe 9, and the drain pipe 10 is connected to the drain port 8 and water conduit pipe 11 to lead the water to the outside of the work machine. Even when modifying an existing muffler, it can be done at low cost and without much effort.

(4) The lower tip of the drain pipe 10 installed in the muffler is
Since the inside of the drain port 8 provided in the muffler accommodating portion is properly fitted, it is ensured that rainwater, etc., falls downward, and some of the exhaust gas passing through the muffler 6 is removed from the drain pipe 10. Even if the exhaust gas is discharged from the muffler chamber 3, it is surely sent to the drain port 8, and rainwater, etc. and exhaust gas enter the muffler storage chamber 3, causing corrosion or being contaminated by adhesion of carbon in the exhaust gas. Never.

(5) The interior of the muffler is divided into four expansion chambers, and the expansion chambers at both ends of the muffler are connected by a communication path, which increases the exhaust noise reduction distance and increases the number of exhaust reversals. , The number of sound-dampening chambers has also been increased, so the sound-damping effect is high.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a perspective view of an engine working machine, FIG. It is a sectional view taken along the line AA in the figure. 1...Soundproof case, 2...Equipment storage room, 3...
Fufra containment room, 4... engine, 5... work equipment,
6...Muffler, 7...Exhaust outlet, 8...Drain port,
9...Exhaust outlet pipe, 10...Water drain pipe, 11...
Water pipe, 3a, 6a...Top wall, 2a, 3b, 6b
...Lower wall.

Claims (1)

[Scope of utility model registration request] A muffler storage chamber 3 is formed above an equipment storage chamber 2 in a soundproof case 1 of a soundproof engine working machine, and an engine 4 and a working machine 5 driven by the engine 4 are installed in the equipment storage chamber 2. A horizontal cylindrical muffler main body 6 of the engine 4 is accommodated in the muffler main body 6, and an exhaust outlet 7 is provided in the upper wall 3a of the muffler housing chamber 3, and a drain port 8 is provided in the lower wall 3b of the muffler housing chamber 3, arranged vertically. One side 24a of the muffler main body 6 is divided into two upper and lower chambers by a partition wall 23, with the primary expansion chamber 12 formed below and the tertiary expansion chamber 14 formed above.
A secondary expansion chamber 13 is formed in the middle portion 24c, a quaternary expansion chamber 15 is formed in the intermediate portion 24c, and the primary expansion chamber 12 and the secondary expansion chamber 13 are formed in the intermediate portion 24c.
are communicated through a primary communication pipe 16, the secondary expansion chamber 13 and the tertiary expansion chamber 14 are communicated through a secondary communication pipe 17, and the
A communication part 19 that communicates the secondary expansion chamber 14 and the quaternary expansion chamber 15 is opened above the quaternary expansion chamber 15, and the exhaust outlet pipe 9 is connected to the upper wall 15a of the quaternary expansion chamber 15, and the exhaust outlet pipe 9 is connected to the lower wall 15b thereof. The drain pipes 10 are arranged vertically and protrude from each other, the partition frame 21 is formed upright from the lower wall 4b, the exhaust outlet pipe 9 is made to protrude above the exhaust outlet 7, and the drain pipe 10 is placed below the drain port 8. Make it stand out,
Draining water from a muffler of a soundproof engine working machine, characterized in that a water conduit 11 led out from a drain port 8 downward passes through an equipment housing chamber 2 and is opened to face the lower wall 2a of the equipment housing chamber 2. Device.