JPS60212610A - Exhaust gas purifying device - Google Patents

Abstract

PURPOSE:To install a muffler advantageously in a car etc. which is restricted to height while increase purifying effect by dividing a muffler into plural numbers and installing them in parallel, while distributing an exhaust gas equally and purifying these gas individually. CONSTITUTION:Plural number of cylindrical mufflers 3 are provided in parallel between front and rear end plate 1, 2, and a hollow combustion cylinder 4 whose rear end is taperedly enlarged, is held in the center of each muffler 3. A radially spiral vane 5 is provided on the outside of the front end of the combustion cylinder 4, and the base part of a truncated-cone type guide cylinder 6 is fixed to the inside wall of the muffler 3 at the rear of the vane 5, while an annular dust collecting groove 7 is formed on the outside of the guide cylindsr 6. A distributing pipe 12 is attached to the front end of an exhaust introduction pipe 11, and a collecting pipe 22 is attached to a discharge pipe 21. Thus, by providing plural number of mufflers 3 in parallel, the muffler can be advantageously installed in a car which is restricted by height, while improving dust-collecting and gas-purifying functions.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to exhaust gas purification for diesel engines, particularly to an exhaust gas purification device suitable for passenger cars.

(Prior art) As an exhaust purification muffler, the exhaust gas is turned into a vortex by rotating the outer surface of a double wire mesh conical cylindrical catalyst tube filled with catalyst particles, and passing through the gap between the catalyst particles from the entire outside of the tube. There are several prior inventions by the applicant.

(Purpose of the Invention) The present invention was made for the purpose of applying the previous invention to vehicles such as e-passenger cars that have limited external installation space, especially height. ), and by arranging them in parallel, the exhaust gas is evenly distributed to each of these mufflers, and the purification process is performed individually.

(Structure of the Invention) The structure of the present invention will be explained with reference to the drawings. 1. Fig. 1 is a plan view of the exhaust gas purification device of the present invention showing the main parts in cross section, and Fig. 2 is a sectional view taken along the line A-A in Fig. Figure 3 is a sectional view taken along the line B-B, and the fourth
The figure is a rear view.

In the drawing, /, is the front and rear end plates, and several cylindrical mufflers 3 are arranged in parallel between the two end plates, and in the center of each muffler 3 there is a hollow concentrically enlarged in the rear with a tapered shape. A radial swirl blade S is arranged on the outside of the front end of the core part t, and the base of a truncated conical guide cylinder B is fixed to the inner wall of the 77 roller 3 at the rear of the towing blade S. The periphery of the front end of the cylinder O is brought close to the outer circumference 1 of the catalyst cylinder, and an annular dust collecting groove 7 is formed on the outside of the cylinder O.

// is an exhaust introduction pipe, with a distribution pipe /2 attached to the front end, and several terminal parts /3 provided thereon connected to the front ends of each of the mufflers 3, respectively.

, 2/ is an exhaust pipe, to which a collecting pipe λU having almost the same shape as the above-mentioned distribution pipe /U is attached, and several terminal parts 3 are attached to this.
are connected to the rear end of each muffler 3, respectively.

3/ in the diagram is the dust pipe, 3.2.33 is the communication port, 3
ke indicates the dust discharge cock.

In the example shown in the figure, a granular catalyst/LC is filled between a double wire mesh holder a and 4zb made of SUS material, etc., and an injection port lld is provided at the rear of the catalyst cylinder t. In some cases, ceramic or the like is used.

The catalyst cylinder used in the present invention, as explained in the function section below, is capable of connecting the mirror plate 71 and the catalyst chamber 3 to a force that is unlikely to cause clogging or damage to the pV even after several years of use. A flange joint, a fitting joint, etc. are provided in between (not shown) - If the front end of the cylinder is fitted and joined to the catch and la provided on the boss part of the swirl blade S, it can be disassembled and taken out. It's even better.

In addition, in the distribution pipe 7.2 and the collecting pipe 2a, as shown in the illustration, there are vertical and horizontal partition plates /, 2"X/, 2b, Uni'1, 2
, 2b has the advantage that exhaust gas can be evenly supplied to each muffler 3.

(Function) Exhaust gas enters each muffler 3 equally from the exhaust introduction pipe // through the distribution pipe / 2 and the terminal part / 3 ~ the vortex flow is created by the vortex blade S, and the catalyst cylinder is removed by the pulling guide tube B. They gather in the vicinity of the core, swirl around the outer wall of the core, and move toward the rear of the tube.

Immediately after the exhaust gas passes through the guide tube B, large particles in the contained dust are separated to the P side by centrifugal force, and the dust is passed through the dust collection groove 7.
, enters the dust pipe 3/ through the communication hole 3.2. While the gas moving toward the rear side of the cylinder rotates around the outside of the cylinder, most of the fine dust in it is dispersed outward by centrifugal force, and the dust travels backward along the wall surface of the muffler 3 and connects the cylinder 133. Since the dust is collected at the rear of the muffler 3 together with the dust sent to the dust pipe 3, the cock 3'l can be turned on at any time to take it out to the outside.

The gas traveling on the outside of the catalyst tube is heated to the catalyst+I on the entire surface of the tube after removing the fine dust therein as described above.
When passing through the C layer, it is efficiently purified, and the clean gas is discharged to the outside through the collecting pipe, 2.2, and the exhaust pipe, 2/.

(Effects of the Invention) The exhaust purification device of the present invention purifies exhaust gas by distributing it evenly to several mufflers, so each muffler can perform fine dust collection and gas purification, and each muffler is arranged in parallel. Therefore, the height is low and the space is narrow like a passenger car (
In particular, it can be installed in a place with a low height, and since each catalyst cylinder processes the gas from which most of the dust has been removed using its entire surface, it is effective in eliminating the risk of clogging over a long period of time.

[Brief explanation of drawings]

Fig. 1 is a top view of the exhaust gas purification device of the present invention showing the main parts in cross section, Fig. 2 is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a sectional view taken along the line B-B, and Fig. 4 is a sectional view taken along the line B-B. It is a rear view. C, 2 = End plate 3: Muffler: Catalyst cylinder S: Swirl blade
A guide tube 7: Dust collection groove //: Inlet pipe /No: Distribution pipe /3: End part -/: Discharge pipe 2λ: Collecting pipe 23:
Terminal section 51- JP-A-Sho GO-212610 (4)

Claims (2)

[Claims] (1) Several cylindrical mufflers are installed in parallel between the front and rear mirror plates,
Each muffler holds a hollow catalyst cylinder with its rear enlarged, a radial full-flow wing is arranged outside the front end of the core, and a truncated conical guide strip is attached to the inner wall of the muffler at the rear of the wing. The front end of the core is brought close to the outer periphery of the catalyst cylinder, and an annular dust collection groove is formed on the outside of the core. Separately, a distribution pipe and a collecting pipe are installed in the exhaust gas introduction pipe and the exhaust gas discharge pipe, respectively. An exhaust purification device comprising: connecting these to the front and rear ends of each muffler, and disposing guide plates in each distribution pipe and collecting pipe for uniformly sending and exhausting to each muffler. (2) The exhaust gas purification device according to claim 1, wherein the front and rear mirror plates are removable from each muffler.