JPS5849369Y2 - Engine exhaust dust removal device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a dust removal device that is attached to the exhaust pipe of an engine, particularly a diesel engine, to remove dust such as black smoke and powder discharged from the engine.

The exhaust from a diesel engine contains more black smoke than the exhaust from a gasoline engine.

If such black smoke is released into the atmosphere from the casing 1, it not only causes air pollution, which is not desirable, but also causes the following disadvantages.

In other words, large particles in the black exhaust smoke are sometimes emitted as red-hot powder, which can cause a fire and is extremely dangerous if a forklift is used in a warehouse containing combustible materials. be.

In the past, dust removal devices with built-in filters were used to remove dust containing dangerous powder, but with such conventional devices, the filters quickly became clogged, making it difficult to clean the filters. It is troublesome as it has to be replaced frequently.

The present invention aims to eliminate the above-mentioned drawbacks and provide an engine exhaust dust removal device that not only facilitates dust disposal but also has a noise reduction function.

Hereinafter, the present invention will be explained with reference to drawings showing embodiments.

FIG. 1 is a longitudinal sectional side view showing an embodiment of the present invention.

The interior of the casing 4, which is formed by closing the openings at both ends of the cylindrical tube body 1 with end plates 2 and 3, is divided into three compartments, a diffusion chamber 7, a swirling chamber 8, and a dust collection chamber 9, by two partition walls 5.6. It is divided into rooms.

A large circular hole 5 is provided in the partition wall 5 that partitions the diffusion chamber 7 and the swirling chamber 8.
A is formed in the circular hole 5a, and a swirling flow imparting member 11, which is formed entirely in a bowl shape and has single-chamber root-shaped blades io and in bent as shown in FIG. 2, is fixed to the peripheral wall. .

The exhaust conduit 12 includes an end plate 2, a swirling flow imparting member 11° and a partition wall 6.
, is attached almost to the center of the casing 4, passing through the end plate 3 in an airtight manner.

A large number of small holes 13 are provided in the portion of the exhaust pipe 12 inside the diffusion chamber I.
, 13 are provided with a large number of small holes 14.14 on the upstream side of the exhaust gas in the swirling chamber 8 (on the right side of the drawing), and the small holes 14.14 are formed in the exhaust conduit 12 in the above /JJLI 3, 13 and small holes 14.14.
The passage between the two is closed by a blind stopper 15.

The partition wall 6 that partitions the swirling chamber 8 and the dust collection chamber 9 has a passage near the outer periphery of the partition wall 6 for guiding the swirling flow containing dust generated in the swirling chamber 8 directly to the dust collection chamber 9. 16 and 16, through holes 17 and 17 for guiding exhaust gas from the dust collection chamber 9 to the swirling chamber 8 are formed near the inner periphery.

The passage 16.16 guides the swirling flow of exhaust gas containing dust generated in the swirling chamber 8 into the dust collection chamber 9, and is formed so that the swirling flow can pass through that one chamber without changing its direction. .

In this embodiment, as shown in FIGS. 3 to 5, the partition wall 6
Both sides of the notch formed in the hole are bent in opposite directions into a groove shape, forming a so-called grooving hole.

Therefore, the swirling flow generated in the swirling chamber 8 flows into the dust collecting chamber 9 without changing its flow direction when passing through the passage 16, as shown by arrow a in FIG. 9 to generate a swirling flow.

The passage 16 does not have to be the above-mentioned cut-out hole, but can be formed by, for example, making the outer diameter of the partition wall 6 slightly smaller than the inside diameter of the pipe body 1 and fixing the partition wall 6 to the exhaust pipe 12 in the form of a flange.
The annular gap formed between the outer periphery of the pipe body 1 and the inner surface of the tube body 1 can be used as the passage 16, and the swirling flow generated in the dust collection chamber 9 becomes too strong and dust is likely to be stirred up. If there is one, the swirling flow generated in the dust collection chamber 9 can be weakened by using a simple through hole.

Next, the operation of the engine exhaust dust removal device of the present invention constructed as described above will be described.

Exhaust gas sent into the exhaust conduit 12 from the left side of the drawing flows out into the diffusion chamber 7 through the small hole 13.13 because the passage inside the pipe 12 is blocked by the blind plug 15.

At this time, the exhaust gas undergoes a silencing effect due to contraction and expansion.

The exhaust gas in the diffusion chamber 7 then flows into the swirling flow imparting member 11, and then passes through the blades 10 formed on the curved surfaces of the member 11.
10 into the swirling chamber 8 as shown by the arrows in FIG.

Therefore, the exhaust gas containing dust becomes a swirling flow along the inner wall of the tube body 1 and moves to the right in FIG.

During this time, the powder in the dust collides with the inner wall of the tube body 1 and is extinguished, turning into carbon powder.

The airflow noise generated when the exhaust air flows into the diffusion chamber 7 through the small holes 13.13 is attenuated when the exhaust air passes between the vanes 10.10.

The exhaust gas containing dust such as carbon powder then flows into the dust collection chamber 9 through the passage 16 and swirls within the chamber 9.

Because the exhaust flow swirls in this way, heavy dust such as carbon powder collects on the outer circumference of the dust collection chamber 9, and the exhaust near the center of the iron base 9 becomes clean and free of dust. .

This clean exhaust gas then flows back into the swirling chamber 8 through a through hole 17.17 drilled near the center of the partition wall 6.

The swirling flow flowing through the swirling chamber 8 from left to right in the figure is dense around the iron base 8 and sparse near the center of the flow, so the through hole 1
The exhaust gas that has recirculated into the swirling chamber 8 from 7° 17 flows from right to left in the figure near the center of the iron base 8, flows into the exhaust conduit 12 through the small holes 14, 14, and is discharged.

At this time, the exhaust gas is once again subjected to the silencing effect by contraction and expansion.

The dust collected in the dust collection chamber 9 is appropriately discharged by opening a screw plug 18 provided at the bottom of the iron base 9.

It is thought that some dust is stored in the diffusion chamber 7 as well as the dust collection chamber 9, but in order to discharge this, a dust discharge plug may be provided at the bottom of the iron base 7 as well.

The engine exhaust dust removal device of the present invention is constructed and operates as described above, so that: 1) dust collection efficiency is high;

2) Dust can be easily removed by opening the plug 18, and there is no trouble as it only needs to be removed once in a while.

3) Since it also has a noise reduction function, it can simplify the assembly of the exhaust system and parts management.

This has great practical effects.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view, FIG. 2 is a sectional view taken along line AA in FIG. 1, FIG. 3 is a sectional view taken along line BB in FIG. 4, and FIG. 1 Large C-C sectional view, Figure 5 is the same D-D
FIG. 1... Tube body, 2, 3... End plate, 4...
...Casing, 5, 6... Bulkhead, 5a...
... Circular hole, 7 ... Diffusion chamber, 8 ... Turning chamber, 9 ... Dust collection chamber, 10 ... Vane,
11...Swirling flow imparting member, 12...Exhaust conduit, 13.14...Small hole, 15...
・Blind plug, 16... Passage, 17... Through hole, 18... Screw plug.

Claims (1)

[Scope of utility model registration request] The interior of the casing 4, which is formed by closing the openings at both ends of the cylindrical tube body 1 with end plates 2 and 3, is divided into a diffusion chamber 7, a swirling chamber 8, and a dust collection chamber 9 in order from the exhaust upstream side by partition walls 5 and 6. A pot-shaped swirling flow imparting member 11 having a single roof-shaped blade 10.10 formed around it is fixed to a large-diameter circular hole 5a formed in a partition wall 5 that partitions a diffusion chamber 7 and a swirling chamber 8. A small hole 13° 13 is formed in the diffusion chamber T of the exhaust conduit 12 that airtightly passes through the end plate 2, the swirling flow imparting member 11, the partition wall 6, and the end plate 3.
A large number of small holes 14 and 14 are bored in the swirling chamber 8, and a blind plug 15 is airtightly fixed in the exhaust pipe 12 between the small holes 13, 13 and 1J4L14, 14. A passage 1 is provided near the outer periphery of the partition wall 6 that partitions the dust collection chamber 9 and the dust collection chamber 9.
6. An engine exhaust dust removal device comprising through holes 17, 17 formed near the center of 16.