JP3139925U - Improved catalyst core position fixing device - Google Patents

Abstract

There is provided a catalyst core plate improved type position fixing device in which stability of a gutter provided in a cylinder is improved, and a processing process of the cylinder provided in a silencer is simplified.
A silencer 1 is provided in a waste gas discharge passage 10 of an internal combustion engine, and has at least a partition plate 2 in the housing, thereby trying to discharge waste gas inside the silencer. Form multiple connected expansion chambers used to guide. The catalyst cylinder 3 is integrally formed on a partition plate, and the cylinder has at least an intake side 31 and an exhaust side 32 connected between the two expansion chambers, and a cylinder or partition between the intake side and the exhaust side. The plate has at least one cover plate 40 covered with the catalyst, and the cylinder is provided with a fender portion 5 for preventing the cover plate from sliding in the exhaust side direction. A bottom pushing portion 6 is provided on the inner wall or between the partition plate and the partition plate so as not to slide the gutter plate toward the intake side.
[Selection] Figure 1

Description

The present invention relates to a catalyst cylinder provided in a silencer of an internal combustion engine. In particular, the present invention is an apparatus for introducing a catalyst core plate in the cylinder into waste gas or preventing it from sliding in the discharge direction.

Waste gas emission standards have become stricter, but in order to respond to this, contractors have installed metal cylinders in the exhaust gas discharge passages of, for example, automobile, motorcycle or mower engines, and used them as catalysts. Provide a metal plate to be covered. The catalyst usually contains a noble metal such as palladium (Pd), platinum (Pt), rhodium (Rh), thereby purifying the engine waste gas, and the waste gas improves the quality of the outside air. Negative impact can be reduced.

Further, the metal plate is usually embedded in a cylindrical body as a flat plate and corrugated type plate fitted together, joined, and wound in a spiral shape, and is integrally formed between the cylindrical body and the cylindrical body. A plurality of through-holes are formed which are fixed by welding and used to guide waste gas in the cylinder.

However, since it is fixed by welding between the above-mentioned plate and between the plate and the cylinder, the cost cannot be reduced. In order to overcome the problem, the position of the plate is disclosed in the Taiwan Publication No. 386571 patent. The technology for fixing the inside of the cylinder is posted, and a plurality of fixing holes are provided on both sides of the cylinder housed in the plate, and a fixing shelf is provided between the fixing holes, thereby , By preventing high temperature, vibration, or exhaust of exhaust gas, the sliding plate is not slid from the cylinder, and at the same time, the catalyst covered by the sliding plate is not dropped even if there is friction or collision, In the meantime, however, a separate fixing hole and a fixed shelf are required, so that the number of machining steps is increased, and when the cylinder is provided in the silencer of the gas discharge passage, the cylinder is separated from the silencer by welding. Since it must be fixed to the plate, At the same time is increased, there is a problem that the cost is increased, it must resolve them.
Taiwan Notice No. 386571 Patent

An object of the present invention is to provide a position fixing device which is provided in a silencer so that the core plate is not fixed in the cylinder and the catalyst core plate does not slide.

In order to achieve the above object, one silencer, one internal combustion engine on the waste gas discharge passage on the internal combustion engine, and one in the housing are provided in the waste gas discharge passage of the internal combustion engine. At least one diaphragm, thereby forming a plurality of connected expansion chambers that are used to guide the exhaust of the waste gas inside the silencer.

The catalyst cylinder is integrally formed on the partition plate, and the cylinder has at least an intake side and an exhaust side connected between the two expansion chambers, and the cylinder between the intake side and the exhaust side is covered with the catalyst. This is a catalyst core plate improved type position fixing device in which there is at least one soot plate, and a fender portion is provided on the cylinder so as not to slide the soot plate toward the exhaust side.

The bottom pushing portion for preventing the sliding plate from sliding in the intake side direction is a catalyst core plate improved position fixing device provided on the inner wall of the intake side and the silencer or between the partition plates.

In addition, in the present invention, the fender portion is a cross-shaped, curved or divided sheet-shaped fender bar integrally formed on the exhaust side of the cylindrical body, and the fender portion has an uneven or wavy shape. In the catalyst core plate improved position fixing device, there is a concave portion that can be attached to the core plate to stop the slippage of the core plate, and a convex portion in which a vent hole is formed between the concave portion and the concave portion. is there.

The bottom pushing part provided on the inner wall of the intake side and the silencer is a fender plate welded between the intake side and the inner wall, or a part provided on the inner wall and a protrusion for pressing against the intake side. is there.

The bottom pushing portion provided between the intake side and the partition plate is a fender plate welded between the intake side and the partition plate.

The fender portion is provided on a partition plate, and the cylinder is a catalyst core plate improved position fixing device that may be provided so as to be coupled to the partition plate.

By the above, the complexity of the processing process of the plate fixed in the metal cylinder is simplified, and the stability and durable service life of the plate provided in the cylinder are improved. The cylindrical body is integrated and provided in the silencer, the processing process in which the cylinder is provided in the silencer is simplified, and further, the combination of the catalyst core plate and the cylinder, The placement efficiency is further improved.

In order to describe the present invention in detail, a preferred embodiment will be described as follows in detail with reference to the drawings.

As shown in the cross-sectional view of the first embodiment of the present invention in FIG. 1, the silencer 1 is connected to the waste gas discharge passage 10 of the internal combustion engine, and has at least a diaphragm 2 (FIGS. 2 and 6) in the housing. The first expansion chamber 11 and the second expansion chamber 12 are formed to lead the inside of the silencer 1 to exhaust the waste gas. The exhaust pipe 13 of the waste gas discharge passage 10 is connected to the engine and communicates with the outside atmosphere through the tail pipe 14 in the second expansion chamber 12 silencer 1.

The catalyst cylinder 3 is integrally formed on the partition plate 2. On the cylinder 3, there are an intake side 31 and an exhaust side 32 connected between the first and second expansion chambers 11, 12. In the cylinder 3 between the exhaust sides 31 and 32, there is at least one saddle plate 4 covered with the catalyst. In this embodiment, a plurality of saddle plates 4 and 41 covered with the catalyst are taken as an example (FIG. 2). As shown in FIG. 3, in the present embodiment, a spiral ridge plate 40 wound by a flat plate plate 4 and a corrugated plate 41 is employed, and is wound between the plate plates 41 and 41. In addition, a plurality of through holes 42 for guiding waste gas are formed, and each through hole 42 is connected between the intake side and the exhaust side 31, 32 of the cylindrical body 3. At the same time, a fender portion 5 is provided on the cylinder 3 so as not to slide the gutter 40 toward the exhaust side 32, and the through holes 42 and the second expansion chamber 12 are connected to the fender portion 5. At least one exhaust port 51 (FIG. 6) is provided. The bottom pushing portion 6 (FIGS. 1, 2, and 6) for preventing the saddle plate 40 from sliding toward the intake side 31 is a position of the catalyst core plate provided between the intake side 31 and the partition plate 2. It is an improved fixing device.

In a more specific implementation, the present invention includes noble metals such as palladium (Pd), platinum (Pt), rhodium (Rh).

The fender portion 5 is a cross-shaped, curved or divided sheet-shaped fender bar 52 integrally formed on the exhaust side 32 of the cylinder 3 or the partition plate 2 (see FIGS. 2, 3, 4 and 5). As shown).

The bottom pushing portion 6 provided between the intake side 31 and the partition plate 2 is a curved fender plate 61 provided between the intake side 31 and the partition plate 2.

Due to the combination of the above-described components, when the engine is operated, particularly when the engine is operated, waste gas generated from the engine passes through the exhaust pipe 13 of the waste gas discharge passage 10 and the first expansion chamber of the silencer 1. 11 (FIG. 1), passes through the fender plate 61, and then is guided from the intake side 31 of the cylinder 3 to the plurality of through holes 42 (FIG. 6) of the flange plate 40, and further exhausted from the fender portion 5. After being led into the second expansion chamber 12 through the mouth 51 and the exhaust side 32 of the cylinder 3, it is discharged from the tail tube 14 to the outside atmosphere. Meanwhile, when the waste gas passes through the plurality of through-holes 42, the waste gas is purified by oxidizing and reducing the catalyst in the saddle plates 4 and 41. At the same time, due to the flow of waste gas, the gutter 40 starts to slide toward the exhaust side 32 of the cylinder 3, but the gutter 40 is blocked by the fender bar 52 of the fender 5, and the fender plate 61 causes the gutter 40 to be It stops in the suction side 31 in the body 3, and restrict | limits the movement of the collar board 40 within the cylinder 3. FIG.

Thereby, it is controlled that the saddle plate 40 leaves the cylindrical body 3 due to the flow of high temperature, vibration or waste gas, and the catalyst covered on the saddle plate 40 is prevented from falling due to friction or collision. As a result, the stability of the collar plate 40 provided in the cylinder 3 is enhanced, and the durable service life of the collar plate 40 is extended. According to the above-described method, the catalyst core plate 40 is not fixed in the cylinder, the complexity of the processing process in which the catalyst core plate 40 is provided in the metal rod cylinder 3 is simplified, and the catalyst core plate 40 is provided in the rod plate 40. The cylindrical body 3 is integrally formed, and the processing step in which the cylindrical body 3 is provided in the silencer 1 is simplified, and the combination of the catalyst core plate 40 and the cylindrical body 3 and into the silencer 1 are simplified. The arrangement efficiency is improved, and the manufacturing cost is reduced.
The fender bar 52 of the fender portion 5 has a concave or convex shape or a wave shape (FIG. 7), and has at least one concave portion 53 that can stop the slippage of the core plate 40. In this embodiment, a plurality of concave portions 53 and convex portions 54 are taken as an example. However, in the present embodiment, the interval between the plurality of concave portions 53 and the convex portions 54 is provided. A plurality of vent holes 55 are formed, and the through holes 42 of the gutter plate 40 and the vent holes 55 are connected. As a result, the waste gas that has passed through the plurality of through holes 42 is guided into the second expansion chamber 12 through the plurality of vent holes 55, and the smoothness of the waste gas that has been guided to the roof plate 40 is improved. Be improved.

The cylindrical body 3 is formed by pressing with the partition plate 2 or the partition plate 2 and the cylindrical body 3 are integrally formed. It is possible to provide a spiral board wound in

As shown in the three-dimensional exploded view of the second embodiment of the present invention in FIG. 8, a silencer 1a (FIG. 9) is provided in the waste gas discharge passage 10a of the internal combustion engine of the mower. The silencer 1a is composed of an upper lid 16a and a lower lid 15a. By providing at least the diaphragm 2a in the silencer 1a, the silencer 1a is guided to discharge waste gas. The lower expansion chamber 11a and the upper expansion chamber 12a are formed. At least one fender portion 5a is provided on the partition plate 2a, the catalyst cylinder 3a is provided on the partition plate 2a, and the lower layer and the upper expansion chambers 11a, 12a. An intake side 31a and an exhaust side 32a are provided to connect each other, and in the cylinder 3a between the intake side and the exhaust side 31a, 32a, at least a cover plate 4 covered with a catalyst is provided. In the present embodiment, as described above, as an example in which the spiral ridge plate 40 wound by the flat plate plate 4 and the corrugated plate 41 is employed (as shown in FIGS. 2 and 10). The fender portion 5a prevents the saddle plate 40 from sliding in the exhaust side 32a direction, and prevents the saddle plate 40 from sliding in the intake side direction between the inner wall 19a of the intake side 31a and the silencer 1a. The bottom pushing part 6a for doing is provided.

The lower expansion chamber 11a is connected to the waste gas discharge passage 10a and the engine by an intake port 17a at the bottom of the lower lid 15a (FIGS. 8 and 9), and the upper expansion chamber 12a is an exhaust port at the upper portion of the upper lid 16a. It is connected to the outside atmosphere by 18a. The plurality of through holes 42 of the flange plate 40 are also connected between the intake side and the exhaust side 31a, 32a of the cylinder 3a (FIG. 10). Above the fender portion 5a, there is at least one exhaust port 51a connecting each through hole 42 and the upper expansion chamber 12a. The fender portion 5a is integrally formed and intersects with the cylinder 3a exhaust side 32a or the partition plate 2a. , Curved or separated sheet-like fender bar 52a (as shown in FIGS. 3, 4 and 5), and a bottom pushing portion provided between the intake side 31a and the inner wall 19a of the silencer 1a Reference numeral 6a denotes a curved fender plate 61a provided between the intake side 31a and the inner wall 19a, and the other components are the same as those in the first embodiment.

As described above, when the engine is operated, the waste gas generated from the engine is led into the lower expansion chamber 11a of the silencer 1a through the waste gas discharge passage and the intake port 17a (FIG. 9), and the fender plate 61a is passed through the fender plate 61a. Through the intake side 31a of the cylinder 3a, it is led to a plurality of through holes 42 (FIG. 10) of the flange 40, and then the upper layer is expanded by the exhaust port 51a of the fender portion 5a and the exhaust side 32a of the cylinder 3a. After being guided into the chamber 12a, it is discharged from the exhaust port 18a to the outside atmosphere. In the meantime, when the waste gas passes through the plurality of through holes 42, the waste gas is purified by oxidizing and reducing the catalyst in the saddle plates 4 and 41. At the same time, the slat 40 starts to slide toward the exhaust side 32a of the cylinder 3a due to the flow of waste gas, but the slat 40 is blocked by the fender bar 52a of the fender portion 5a, and the fender plate 61a 3a is pressed against the intake side 31a and the bottom of the core plate 40 to control the movement of the core plate 40 within the cylindrical body 3a, and other embodiments are the same as in the first embodiment.

The bottom pushing portion 6a provided between the inner wall 19a between the intake side 31a and the silencer 1a is partially provided on the inner wall 19a, and also serves as a protrusion 62a (FIG. 11) for pressing against the intake side 31a. The combination of the other parts and the embodiment are the same as those in the second example.

The foregoing is only used to explain the preferred embodiment of the present invention, and should not be used to limit the scope of claims for registration of the present invention. Anything made by modifying or changing it shall be included in the scope of the registration request described below.

Sectional view of the first embodiment of the present invention Three-dimensional exploded view of the first embodiment of the present invention Front view of the cylinder in the first embodiment of the present invention Another front view of the cylinder in the first embodiment of the present invention The other front view of the cylinder in the first embodiment of the present invention Sectional drawing of the cylinder in the first embodiment of the present invention Another sectional view of the cylinder in the first embodiment of the present invention Three-dimensional exploded view of the second embodiment of the present invention Sectional view of the second embodiment of the present invention Partial enlarged view of FIG. Another sectional view of the second embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Silencer 1a Silencer 10 Waste gas discharge passage 10a Waste gas discharge passage 11 First expansion chamber 11a Lower expansion chamber 12 Second expansion chamber 12a Upper expansion chamber 13 Exhaust pipe 14 Tail pipe 15a Lower lid 16a Upper lid 17a Inlet 18a Exhaust Port 2 Separation plate 2a Separation plate 3 Tubular body 3a Tubular body 31 Intake side 31a Intake side 32 Exhaust side 32a Exhaust side 4 Plate 40 40 Plate 41 Plate 42 Through hole 5 Fender portion 5a Fender portion 51 Exhaust port 51a Exhaust port 52 Fender bar 52a Fender bar 53 Concave portion 54 Convex portion 55 Vent hole 6 Bottom pushing portion 6a Bottom pushing portion 61 Fender plate 61a Fender plate 62a Protruding portion

Claims (10)

The muffler is provided in the waste gas discharge passage of the internal combustion engine and has at least a diaphragm in the housing, thereby connecting the plurality of mufflers used to guide the exhaust of the waste gas An expansion chamber is formed, and the catalyst cylinder is integrally formed on the partition plate. The cylinder has at least an intake side and an exhaust side connected between the two expansion chambers, and the cylinder is located between the intake side and the exhaust side. Has at least one soot plate covered with the catalyst, the cylinder is provided with a fender portion for preventing the soot plate from sliding in the exhaust side direction, and does not slide the soot plate in the intake side direction The catalyst core plate improved position fixing device according to claim 1, wherein the bottom pushing portion is provided on the inner wall of the intake side and the silencer or between the intake side and the partition plate. 2. The catalyst core plate improved position fixing device according to claim 1, wherein the fender portion is a cross-shaped, curved-shaped or separate sheet-shaped fender bar integrally formed on an exhaust side of the cylindrical body. The fender portion has an uneven or wavy shape, has at least one recess that can be attached to the core plate to stop the slip of the core plate, and a vent hole is formed between the recess. The catalyst core plate improved position fixing device according to claim 1, wherein at least one convex portion is provided. The bottom pushing part provided on the inner wall of the intake side and the silencer is a fender plate welded between the intake side and the inner wall, or a part is provided on the inner wall and is a protrusion for pressing against the intake side. The catalyst core plate improved position fixing device according to claim 1, wherein 2. The catalyst core plate improved position fixing device according to claim 1, wherein the bottom pushing portion provided between the intake side and the partition plate is a fender plate welded between the intake side and the partition plate. The muffler is provided in the waste gas discharge passage of the internal combustion engine and has at least a diaphragm in the housing, thereby connecting the plurality of mufflers used to guide the exhaust of the waste gas An expansion chamber is formed, and there is at least one fender portion on the partition plate. The catalyst cylinder is integrally formed on the partition plate, and the cylinder has at least an intake side and an exhaust side connected between the two expansion chambers, and the cylinder between the intake side and the exhaust side is covered with the catalyst. There is at least one saddle plate, a fender portion for preventing the saddle plate from sliding in the exhaust side direction, and a bottom pushing portion for preventing the saddle plate from sliding in the intake side direction, A catalyst core plate improved position fixing device, which is provided on an inner wall of an intake side and a silencer or between an intake side and a partition plate. The catalyst core plate improved position fixing device according to claim 6, wherein the fender portion is a cross-shaped, curved-shaped or separate sheet-shaped fender bar integrally formed on the exhaust side of the cylindrical body. The fender portion has a concave or convex shape, and is provided with a concave portion that can be attached to the core plate to stop the slippage of the core plate, and a convex portion in which a vent hole is formed between the concave portion. The catalyst core plate improved position fixing device according to claim 6, wherein the catalyst core plate improved position fixing device. The bottom pushing part provided on the inner wall of the intake side and the silencer is a fender plate welded between the intake side and the inner wall, or a part is provided on the inner wall and is a protrusion for pressing against the intake side. The catalyst core plate improved position fixing device according to claim 6, wherein: The catalyst core plate improved position fixing device according to claim 6, wherein the bottom pushing portion provided between the intake side and the partition plate is a fender plate welded between the intake side and the partition plate.