JPH08196918A - Catalyst carrier for purifying exhaust gas and catalyst carrier device for purifying exhaust gas using the catalyst carrier - Google Patents

Abstract

PURPOSE: To make longer the reaction time of flowing gas forming a turbulence with a catalyst agent, retain flow path intervals to be almost equal to make the purification process even and improve the purification performance and also make the manufacturing cost inexpensive because of the simple constitution. CONSTITUTION: A catalyst carrier for purifying exhaust gas is stored in a cylindrical case with both ends open while forming a multiple winding body, and the catalyst carrier is composed of a belt-shaped sheet, while a turbulence generating section 18 for generating the turbulence on the belt-shaped sheet in the state of being disposed in a case 14 is formed, and the turbulence generating section is composed of a plurality of openings 20 or a varying surface section for varying the air flow in the state of being disposed in the case. Engaging sections 42 for engaging and protecting the catalyst carrier stored inside from separating are formed on the open sections of both ends of the casing storing the catalyst carrier.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust gas purifying catalyst carrier which is installed in an exhaust gas system of an internal combustion engine of an automobile or the like and purifies exhaust gas, and an exhaust gas purifying catalyst using the catalyst carrier. The present invention relates to a carrier device.

[0002]

2. Description of the Related Art Conventionally, as a catalyst carrier for purifying exhaust gas of an internal combustion engine of an automobile or the like, there is a ceramic honeycomb body made of ceramic or a catalyst carrier made of stainless steel. This catalyst carrier must have a structure that can withstand high-temperature and high-velocity exhaust gas discharged from an internal combustion engine,
In addition, it is required to have excellent purifying ability at the same time. Generally, as shown in FIGS. 17 and 18, a corrugated plate is made of heat-resistant stainless steel flat plate coated with a catalytic agent. After the corrugated steel sheets coated with the catalytic agent have been stacked, the honeycomb body is formed by winding the honeycomb body from the end side, and the honeycomb body is inserted into a tubular case made of heat-resistant stainless steel. It is installed in the exhaust gas system of internal combustion engines such as.

[0003]

However, as shown in the cross-sectional view of FIG. 16, each air passage formed in the honeycomb carrier formed by the corrugated steel plate and the flat steel plate of the catalyst carrier is formed by a straight smooth surface. Therefore, the exhaust gas flowing through the air passage flows at a stretch along the smooth surface, and the reaction time with the catalyst agent applied to the surface of the carrier is short, and the exhaust gas is contained in the exhaust gas. There is a drawback that the purification efficiency of harmful substances is low. Also,
In corrugated steel sheets subjected to corrugation, the mutual intervals of corrugations are often deformed during transportation, storage, and manufacturing processes, and uniform air passage intervals cannot be formed, so that exhaust gas cannot be uniformly purified. Further, there is a problem that special equipment is required to process the corrugated steel sheet, the amount of the steel sheet used is increased due to the corrugation, and the manufacturing cost tends to be high.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to form a turbulent flow generating portion in a strip-shaped thin steel plate, or a changing surface portion for changing the flow of the flowing wind. By configuring the catalyst carrier and the catalyst carrier device composed of a multi-turn body with the strip-shaped thin plate provided with this turbulent flow generation section, (1) exhaust gas flowing through each air passage in the catalyst carrier is The reaction time with the catalyst agent becomes longer while flowing as a turbulent flow, and the purification performance of harmful substances contained in the exhaust gas can be improved. (2) The exhaust gas flowing through the catalyst carrier can be uniformly purified by maintaining the air passage intervals in the catalyst carrier substantially even. (3) The strip-shaped thin plate provided with the turbulent flow generator forms a multi-winding body, so it is easy to manufacture, no special equipment is required, the amount of steel plate used is small, and the manufacturing cost can be saved. Another object of the present invention is to provide such a catalyst carrier and a catalyst carrier device.

[0005]

In order to achieve the above object, the invention according to claim 1 is arranged to be housed in a cylindrical case 14 which forms a multiple winding body 12 and has openings 13 at both ends. An exhaust gas purification catalyst carrier, the catalyst carrier comprising:
A turbulent flow generation unit 1 which is composed of a strip-shaped thin plate 16 and which generates a turbulent flow in a state where the strip-shaped thin plate 16 is arranged in the case 14.
8, the turbulent flow generating section 18 is a changing surface section 2 for changing the flow of the wind flowing from the opening 13 in the state of the multiple wound body 12 arranged in the plurality of holes 20 or the case 14.
An exhaust gas purifying catalyst carrier 1 characterized by comprising 2
It consists of zero.

In the invention according to claim 2, the multiple winding body 12 is a multiple cylinder arranged concentrically so that the strip-shaped thin plates 16 mutually form a required gap 32 in the case 14. It may consist of the body 34.

Further, in the invention according to claim 3, the multiple wound body 12 may be composed of a spiral body 50 in which the single strip-shaped thin plate 16 is spirally arranged.

Further, in the invention according to claim 4, the changing surface portion 22 may be composed of concave dimples 26 formed at a plurality of positions of the strip-shaped thin plate 16.

Further, in the invention according to claim 5, the changing surface portion 22 may be composed of a blade body 30 in which a slit 28 is formed on the strip-shaped thin plate 16 and the inside of the slit 28 is pushed up.

Further, in the invention according to claim 6, the blade body 30 may be provided so as to change the flow of wind.

Next, an invention according to claim 7 is the catalyst carrier 10 according to any one of claims 1 to 6, and a cylindrical case 14 containing the catalyst carriers 10 and having openings 13 at both ends. The case 14 has both end openings 13 and 1 on the end side thereof.
An exhaust gas purifying catalyst carrier device 40 using a catalyst carrier is provided in three parts, and a locking portion 42 is provided for locking the detachment of the catalyst carrier 10 housed inside from the case 14. To be done.

Further, in the invention according to claim 8, the locking portion 42 is provided with a spacing holding portion 44 for holding each winding body of the multiple winding body 12 at a required spacing. Good.

Further, in the invention according to claim 9, the locking portion 42 is composed of a locking rod 46 arranged in a direction intersecting with the flow direction of the gas flow in the case 14, and the interval holding portion 4
4 may be formed on the locking rod 46, and may include a comb tooth-shaped groove 48 for holding and holding the edge of the multiple wound body 12.

Further, in the invention according to claim 10, the locking rod 46 may be fixed so as to intersect the openings 13 at both ends of the case 14.

[0015]

The metal carrier for an exhaust gas purification catalyst according to the present invention is
A strip-shaped thin plate made of a heat-resistant stainless steel plate is provided with turbulent flow generating portions each having a hole or a changing surface portion for changing the flow of wind at required intervals. The strip-shaped thin plate provided with the turbulent flow generation portion is wound into a multi-cylinder body or a spiral body to form a multi-roll body. The multi-winding body is placed in a cylindrical case body and fixed to the openings at both ends of the case with locking portions so as not to separate. At the same time, the ends of the multiple wound bodies are locked by the locking portions, and the gaps between the wound bodies are evenly maintained. Finally, the case body is dipped in a catalyst agent to form a catalyst carrier.

Since the exhaust gas flows through the gap between the multi-winding bodies by being installed in communication with the exhaust system of the automobile, the flow of the exhaust gas is at the position of the turbulent flow generating portion provided on the side surface of the body of each winding body. The fluid pressure changes to a turbulent flow, and this turbulent flow lengthens the time for the exhaust gas to come into contact with the coated catalyst agent and react, which improves the purification performance of carbides and nitrogen oxides contained in the exhaust gas. It becomes higher and the purification performance is improved. Further, the catalyst carrier inserted in the cylindrical case body can hold the mutual gaps of the multiple winding bodies in a uniform gap by the engaging portions provided at the both end openings of the case body, so that the catalyst carrier is passed through the case body. Exhaust gas flowing can be purified substantially uniformly. In addition, since the multi-layered cylindrical body forms the strip-shaped thin plate on which the turbulent flow generation part is formed into a cylindrical shape or a spiral shape, it does not require special equipment compared to the case of processing a corrugated plate, and The length of the strip-shaped thin plate is short, and the manufacturing cost can be saved.

Further, the multi-winding body comprises multi-cylindrical bodies in which the strip-shaped thin plates are concentrically arranged so as to form a required gap in the case.
Exhaust gas flowing through the spaces between the multi-cylinders is turbulently promoted at the holes of the turbulent flow generation section or the flow change surface of the wind provided on the multi-cylinder surface, and the exhaust gas purification performance is improved. Also, since the multiple cylinders are formed by arranging cylinders with different diameters concentrically, compared to the corrugated plate, the intervals between the cylinders through which the wind flows can be formed more accurately, and the multiple cylinders flow through The exhaust gas generated can be purified uniformly.

Further, since the multi-winding body is composed of a spiral body in which the single strip-shaped thin plate is spirally arranged, the exhaust gas flowing through the space between the spiral bodies is provided on the surface of the spiral body. Turbulent flow is promoted in the holes of the turbulent flow generation portion or in the flow change surface portion of the wind, and the exhaust gas purification performance is improved. In addition, the spiral body can maintain a substantially constant mutual distance while spirally winding a single strip-shaped thin plate from one end, and can uniformly purify exhaust gas flowing inside. Furthermore, since it is formed from a single strip-shaped thin plate, the processing steps are simple, and the device can be fixed very easily when it is configured as a catalyst carrier device when mounted on a case or the like.

Further, since the changing surface portion is composed of concave dimples formed at a plurality of positions of the strip-shaped thin plate, the exhaust gas flowing through each interval of the multiple wound body is turbulent at the positions of the dimples. Therefore, the purification performance is improved.
Further, as compared with corrugation, it is possible to easily form dimples on a strip-shaped thin plate continuously with a press tool or the like.

Further, the changing surface portion is composed of a blade body in which a slit is formed on the strip-shaped thin plate and the inside of the slit is pushed up, so that a slit of an arbitrary shape can be continuously engraved on the strip-shaped thin plate. The blade body can be formed on.

Further, since the blade body is provided so as to change the flow of wind, the exhaust gas flowing through the interval between the multiple winding bodies is efficiently promoted to be turbulent in the blade body. It

Next, an exhaust gas purifying catalyst carrier device using the catalyst carrier according to the present invention contains the catalyst carrier according to any one of claims 1 to 6 and these catalyst carriers, and both ends are opened. The case is provided with a cylindrical case, and an engaging portion for engaging with the detachment of the catalyst carrier housed therein from the case is provided at both end side opening portions of the case. The turbulent flow of the exhaust gas flowing through the space in the catalyst carrier is promoted while locking the catalyst carrier inserted into the body so as not to separate, and the exhaust gas can be efficiently purified.

Further, the locking portion is provided with an interval holding portion for holding each wound body of the multiple wound body at a required interval, so that the multiple wound body arranged in the case body. The respective intervals can be kept constant, and the exhaust gas flowing through the inside of the multiple wound body can be uniformly purified.

Further, the locking portion is composed of a locking rod arranged in a direction intersecting with a gas flow direction in the case, and the interval holding portion is formed on the locking rod, and the multiple winding body is formed. By forming the comb-shaped groove for sandwiching and holding the edge of the multi-winding body, the ends of the multi-winding body can be locked by the comb-teeth-shaped groove to keep the mutual spacing of the multi-winding body constant at all times. .

Further, since the locking rod is fixed so as to intersect with the openings at both ends of the case, the multiple winding body can be reliably locked in the case.

[0026]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. 3 and 4 show the first embodiment of the present invention.
An exhaust gas purifying catalyst carrier 10a according to an embodiment is shown. As is apparent from the figure, the exhaust gas purifying catalyst carrier 10a forms a multi-winding body 12 and has openings 1 at both ends.
The catalyst carrier 10a is housed and arranged in a cylindrical case 14 which is formed of a plurality of strips 3 and 13, and the catalyst carrier 10a is formed of a strip-shaped thin plate 16 as shown in FIGS.

In the figure, the strip-shaped thin plate 16 is formed in a rectangular shape by using a metal steel plate such as heat-resistant stainless steel as a material. Further, the strip-shaped thin plate 16 has a cylindrical case 1
Turbulence generator 18 for generating turbulence when placed in
Is provided. As shown in FIG. 1, the turbulent flow generating portion 18 is in a state of a plurality of holes 20 punched and opened in the strip-shaped thin plate 16 at required intervals, or a state of the multiple winding body 12 arranged in the case 14 shown in FIG. 10 and 11 so that the flow of the air flowing in from the opening 13 on one end side of the case 14 can be changed by
It is formed from the changing surface portion 22 as shown in FIG. The material of the strip-shaped thin plate 16 is usually stainless steel, but from the viewpoint of heat resistance and acid resistance, a thin plate of ferritic stainless steel containing aluminum is preferably used.

As a result, the catalyst carrier 10a composed of the multi-wound body 12 in which the strip-shaped thin plate 16 having the holes 20 or the changing surface portions 22 is multi-wound is installed in the exhaust system of an internal combustion engine such as an automobile, and The exhaust gas passing through the space between the wound bodies of the wound body 12 becomes a turbulent flow at the position of the hole 20 or the changing surface portion 22 and the reaction time with the catalyst becomes long, and the carbide and nitrogen contained in the gas are increased. The purification performance of harmful substances such as oxides can be improved. Further, it is not necessary to process the strip-shaped thin plate 16 into a corrugated shape or the like, and the hole 20 and the changing surface portion 22 for changing the flow of the wind are continuously machined on the strip-shaped thin plate 16 using an ordinary tool, and then wound into a multiple shape. Therefore, compared with the conventional corrugated plate processing, processing equipment and material costs can be reduced at a low cost.

In the embodiment, the hole 20 has a circular shape, but the shape is not limited to this, and the hole 20 may have a polygonal shape such as an ellipse, a triangle, a quadrangle, and a hexagon. By forming the multi-winding body 12 by the strip-shaped thin plate 16 punched out of the holes 20, the exhaust gas flowing through the intervals divided by each winding body of the multi-winding body 12 is shown in FIG. As shown, the fluid pressure changes at the upper and lower positions of the hole 20 to form a turbulent flow that is attracted into the hole 20, and the turbulent flow flows through the straight gaps of the conventional honeycomb body 24 as shown in FIG. Compared with the case, the contact reaction time with the catalyst agent applied to the surface of the multiple wound body 12 becomes longer, and the purification performance is improved.

In FIGS. 3 and 4, a plurality of holes 20 are formed as the turbulent flow generating portion 18, but the point is that turbulent flow is generated in the flow of this kind of exhaust gas purifying catalyst carrier during gas flow. Any gas can be used as long as it exposes the gas to the catalyst for as long as possible to improve the purification performance. Therefore, the turbulent flow generating portion may be configured as a change surface portion 22 formed on a strip thin plate. For example, the change surface portion 22 is formed at a plurality of locations on the strip thin plate 16 as shown in FIG. Alternatively, the dimples 26 may have a concave shape. This dimple 26
Can be easily formed by a pressing device while moving the strip-shaped thin plate 16. In the embodiment, the dimple 26 has a circular shape, but the shape is not limited to this, and the dimple 26 may be formed into a polygonal concave shape such as an ellipse, a triangle, a quadrangle, and a hexagon. The strip-shaped thin plate 16 on which the dimples 26 are formed is a multi-winding body 1.
By forming 2, the exhaust gas flowing through the space divided by each wound body of the multiple wound body 12 has a fluid pressure at the upper and lower positions of the concave dimples 26 as shown in FIG. It changes into a turbulent flow, the contact reaction time with the catalyst agent applied to the surface of the multi-winding body 12 becomes long, and the purification performance is improved.

As shown in FIG. 11, the changing surface portion 22 is
The slit 28 is formed by engraving the thin strip 16 on the strip 28.
The blade body 30 may be configured such that its inside is pushed up, and the blade body 30 is provided so as to change the flow of wind. Also in this blade body, the blade body 30 can be easily pushed up by forming the slits 28 in the strip-shaped thin plate 16 by a pressing device. In the embodiment, the slit 28 is engraved in a U-shape to push up the U-shaped blade body 30, but the slit 28 is not limited to this and may be formed in an arbitrary shape such as an arc shape or a mountain shape. . By forming the multi-winding body 12 by the strip-shaped thin plate 16 that pushes up the blade body 30, the exhaust gas flowing through the space divided by each winding body of the multi-winding body 12 is shown in FIG. As shown, the fluid pressure changes at the position of the blade body 30 and becomes turbulent flow, the contact reaction time with the catalyst agent applied to the surface of the multi-winding body 12 becomes long, and the purification performance is improved.

As described above, the hole 20 or the changing surface portion 22
The strip-shaped thin plate 16 on which the turbulent flow generating portion 18 is formed is formed on the multi-winding body 12, fixed in the cylindrical case 14, and then dipped in the catalyst agent. As the catalyst agent, Pt,
White metals such as Pd and Rh, copper group such as Cu, Ag and Au, N
rare earths such as d, Ce, La, Th, Mn, Cr, Ni,
Al, Ba, etc., or these compounds are used. Further, as the method for applying the catalyst agent, it is also possible to use an applying means such as electroplating, or various applying methods such as applying electricity or induction heating to raise the temperature.

As shown in FIGS. 3 and 4, the multi-winding body 12 of the catalyst carrier 10a of the first embodiment has the turbulent flow generating section 1 described above.
8 is a strip-shaped thin plate 16 and is formed from a multi-cylinder body 34 which can be arranged concentrically in a cylindrical case 14 having openings 13 at both ends so as to form a required gap 32 therebetween. There is. As shown in FIG. 2, the multiple cylindrical body 34 is formed by fixing 36 by welding or the like both ends of which the cylindrical thin plate 16 is wound and joined in a cylindrical shape from one end to the other end in the longitudinal direction, and It is composed of a plurality of cylinders 38 having the same height but different diameters. The plurality of cylinders 38 having different diameters are concentrically arranged in the case 14.

As a result, a plurality of cylindrical bodies 38 having different diameters are provided.
The exhaust gas flowing from one end to the other end in the mutual gaps 32 arranged concentrically with each other contacts the holes 20 formed in the body side surface of each cylindrical body 38 and the change surface portion 22 of the wind flow. The turbulent flow is promoted, the reaction time between the catalyst agent applied by the turbulent flow and the exhaust gas is lengthened, and the purification performance of harmful components contained in the exhaust gas is improved. In addition, the multiple cylinder 34
Can hold a mutual gap 32 between the cylindrical bodies 38 having different diameters by a locking portion described later, and the exhaust gas flowing through the gap 32 should be uniformly purified and discharged as unpurified gas. There is no. Further, since the structure of the multi-cylinder body 34 is simple, the manufacturing cost is low.

Next, FIGS. 5 and 6 show an exhaust gas purifying catalyst carrier device 40a in which the catalyst carrier 10a of the first embodiment is inserted and locked in a case. In the figure, the catalyst carrier device 40a includes a catalyst carrier 10a having a multi-winding body 12 composed of a multi-cylinder body 34, and a catalyst carrier 10a.
And a cylindrical case 14 having both ends opened 13 is provided. At both ends 13 and 13 of the cylindrical case 14, a locking portion 42 for preventing the catalyst carrier 10a housed therein from coming off. Is provided. As a result, the cylindrical case 14 is fixedly communicated with an intermediate position of an exhaust pipe extended from an exhaust manifold of an internal combustion engine such as an automobile without the catalyst carrier 10a inserted into the case 14 coming off from the case 14. The purification performance can be dramatically improved while the turbulent flow generation section 18 provided in each of the cylinders 38 causes the exhaust gas flowing in the gap 32 of the multiple cylinder 34 in the case 14 to turbulently flow.

As shown in FIGS. 5 and 6, the locking portion 42 includes
An interval holding portion 44 is provided for holding each cylinder 38 of the multiple cylinder 34 at a required interval. As a result, the cylinders 38 of the multiple cylinder 34 can be held in the substantially uniform gap 32, and the exhaust gas flowing through the gap 32 can be purified evenly.

As shown in FIG. 4, the locking portion 42 is formed of locking rods 46, 46 arranged in a direction intersecting the flow direction of the gas flow in the case 14. The interval holding portion 44 is formed by comb-teeth-shaped grooves 48 which are provided at the edges of the locking rods 46, 46 in the longitudinal direction and hold and hold the edges of the cylinders 38 of the multiple cylinder 34. Has been done. Further, the locking rods 46, 46 are provided at both end openings 13 of the case 14,
It is fixed so as to intersect with the groove provided in 13.

As a result, the ends of the tubular bodies 38 of the multiple tubular body 34 are engaged with the comb-shaped grooves 48 of the locking rods 46, 46 so that the gap 32 between the tubular bodies 38 can be kept constant. Further, the multi-cylinder 34 can be reliably locked in the case 14 by intersecting the locking rods 46, 46 and locking the multi-cylinder 34.

Next, FIGS. 7 and 8 show an exhaust gas purifying catalyst carrier 10b according to a second embodiment of the present invention. Further, in FIG. 9, an exhaust gas purifying catalyst carrier device 40b in which the gas purifying catalyst carrier 10b according to the second embodiment is inserted into the cylindrical case 14 and is non-detachably locked by the locking portion 42.
It is shown.

In the figure, the catalyst carrier 10b of the second embodiment is shown.
Is the multiple wound body 1 as in the catalyst carrier 10a of the first embodiment.
2 is accommodated and arranged in the cylindrical case 14 while forming 2, and the strip-shaped thin plate 16 of the catalyst carrier 10a of the first embodiment, the turbulent flow generating portion 18 provided in the strip-shaped thin plate 16,
In addition, the tubular case 14 and the locking portion 4 of the catalyst carrier device 40b
Since the configurations such as 2 are the same as those of the catalyst carrier 10a and the catalyst carrier device 40a of the first embodiment, the same members are designated by the same reference numerals and detailed description thereof will be omitted.

As shown in FIGS. 7 and 8, the catalyst carrier 10b of this embodiment is composed of a spirally wound body 50 in which a single strip-shaped thin plate 16 is spirally arranged as its multiple wound body 12. It is a thing. As a result, the gap 32 of the spiral body 50 is
Turbulent flow of the exhaust gas flowing therethrough is promoted by the holes 20 provided on the body side surface of the spiral body 50 or the changing surface portion 22 of the flow of the wind, the reaction time with the catalyst agent is lengthened, and the purification performance is improved. . Further, the mutual gap 32 formed by spirally winding a single strip-shaped thin plate can be kept substantially constant, and the exhaust gas flowing in the catalyst carrier can be uniformly purified. Furthermore, with the single strip-shaped thin plate 16. The cylindrical case 1 that can be formed and the processing steps are simple.
It can be installed very easily within 4.

In the catalyst carrier 10b of this embodiment, after being inserted into the cylindrical case 14, locking portions 42 for preventing the catalyst carrier 10b from being detached are fixed to the openings 13 at both ends of the case 14. The locking portion 42 is formed of the locking rod 46, and the comb-teeth-shaped groove 48 provided in the locking rod 46 is formed as in the previous embodiment.
It is possible to hold the gaps 32 of the spiral body 50 uniformly while locking the ends of the spiral body 50 by the space holding portions 44 made of.

As described above, in the exhaust gas purifying catalyst carrier 10 and the exhaust gas purifying catalyst carrier device 40 using the catalyst carrier according to the present invention, the turbulent flow generating portion 18 is formed on the strip-shaped thin plate 16.
As the hole 20, or a changing surface portion 22 for changing the flow of the air flowing therethrough is provided, the strip-shaped thin plate 16 provided with the turbulent flow generation portion 18 is multiply wound to form the catalyst carrier 10, and the catalyst carrier is tubular. The catalyst carrier device 4 is inserted and locked in the case 14.
It constitutes 0. Therefore, the exhaust gas flowing through the catalyst carrier becomes a turbulent flow and the reaction time with the catalyst agent is long while flowing, and the purification performance of harmful substances in the exhaust gas can be improved. Uses steel sheets without the need for special equipment in a simple manufacturing process in which strip-shaped thin plates are wound in multiple layers, allowing for uniform purification of the exhaust gas flowing with the passage intervals kept substantially even. The quantity is small and the manufacturing cost is low.

[0044]

As described above, according to the exhaust gas purifying catalyst carrier of the first aspect of the present invention, the exhaust gas purifying is housed and arranged in the cylindrical case having the both ends opened while forming the multiple wound body. A catalyst carrier for use in a catalyst, the catalyst carrier comprising a strip-shaped thin plate, the strip-shaped thin plate being provided with a turbulent flow generating portion for generating a turbulent flow in a state of being arranged in the case. Alternatively, the exhaust gas passing through the intervals between the winding bodies in the multiple winding body is composed of a changing surface portion that changes the flow of the air flowing from the opening in the state of the multiple winding body arranged in the case, A turbulent flow is formed at the position of the hole or the changing surface of the turbulent flow generation portion, and the reaction time with the catalyst is prolonged, and the purification performance of harmful substances such as carbides and nitrogen oxides contained in the exhaust gas is improved. Also, it is not necessary to provide special equipment for processing the strip-shaped thin plate into a corrugated shape, etc., and a continuous tool is used to continuously provide the strip-shaped thin plate with holes or changing surface portions to be turbulent flow generation parts, and then it is wound into multiple shapes. Since it can be formed by processing, the processing equipment and material costs can be saved at a lower cost than the processing of corrugated plates.

According to a second aspect of the present invention, the multiple winding body is composed of multiple cylindrical bodies arranged concentrically so that the strip-shaped thin plates form a required gap in the case. As for the exhaust gas flowing through the space between the multiple cylinders, the turbulent flow is promoted at the holes of the turbulent flow generation part or the flow change surface part of the wind provided on the surface of the multiple cylinders, and the exhaust gas purification performance is significantly improved. improves. In addition, since the multiple cylinders are formed by arranging cylinders with different diameters concentrically, compared to the corrugated plate,
The intervals between the cylinders through which the air flows can be accurately formed, the exhaust gas flowing through the multiple cylinders can be uniformly purified, and the emission of unpurified gas can be suppressed.

According to a third aspect of the present invention, the multi-winding body is composed of a spiral body in which the single strip-shaped thin plate is spirally arranged, so that the exhaust gas flowing through the mutual intervals of the spiral bodies. Turbulent flow of the gas is promoted at the holes of the turbulent flow generation portion provided on the surface of the spiral body or at the flow change surface portion of the wind, and the purification performance of the exhaust gas is improved. In addition, the spiral body can maintain a substantially constant mutual distance while spirally winding a single strip-shaped thin plate from one end, and can uniformly purify exhaust gas flowing inside. Further, since it is formed from a single strip-shaped thin plate, the processing steps are simple, and the device can be fixed very easily when it is configured as a catalyst carrier device when it is mounted on a case or the like.

According to a fourth aspect of the present invention, the changing surface portion is formed of concave dimples formed at a plurality of locations on the strip-shaped thin plate, so that the exhaust gas flowing through the respective intervals of the multiple wound body is prevented. A turbulent flow is generated at the position of this dimple, and the purification performance is improved. Further, as compared with corrugation, it is possible to easily form concave dimples on the strip-shaped thin plate continuously by using a press tool or the like.

According to a fifth aspect of the present invention, the changing surface portion is composed of a blade body in which a slit is formed in the strip-shaped thin plate and the inside of the slit is pushed up, so that the strip-shaped thin plate has an arbitrary shape. The blade body can be easily formed by engraving slits.

According to a sixth aspect of the present invention, since the blade body is provided so as to change the flow of wind, the exhaust gas flowing through the space between the multi-winding bodies is separated from the blade body. The turbulent flow is efficiently promoted to improve the purification efficiency.

Next, according to an exhaust gas purifying catalyst carrier device according to a seventh aspect, the catalyst carrier according to any one of the first to sixth aspects and a tube having both ends opened and containing the catalyst carriers. The case body is provided with a locking portion for locking the detachment of the catalyst carrier housed inside from the case at both end opening portions on the end side of the case. The turbulent flow of the exhaust gas flowing through the space in the catalyst carrier is promoted while locking the catalyst carrier inserted in the catalyst so as not to separate, and the exhaust gas can be efficiently purified.

According to the eighth aspect, the locking portion is
By providing an interval holding portion for holding each wound body of the multiple wound body at a required interval, each interval of the multiple wound body arranged in the case body can be kept constant, and The exhaust gas flowing through can be purified evenly.

According to a ninth aspect of the present invention, the locking portion comprises a locking rod arranged in a direction intersecting with the flow direction of the gas flow in the case, and the spacing holding portion is formed on the locking rod. Since the comb-shaped groove for holding and holding the edge of the multi-rolled body is held, the end of the multi-rolled body is locked by the comb-shaped groove formed on the locking rod. Efficient purification can be achieved by keeping the mutual spacing of the multiple wound bodies always constant.

According to the tenth aspect of the invention, since the locking rod is fixed so as to intersect the openings at both ends of the case, the multiple winding body can be reliably locked in the case.

[Brief description of drawings]

FIG. 1 is a partially enlarged perspective view of a strip-shaped thin plate forming an exhaust gas purification catalyst carrier according to an embodiment of the present invention.

FIG. 2 is a perspective view of a tubular body formed of the strip-shaped thin plate of FIG.

FIG. 3 is a perspective view showing a state in which a plurality of cylinders constituting the exhaust gas purifying catalyst carrier according to the first embodiment of the present invention are superposed on one multiple cylinder.

FIG. 4 is a perspective view showing a state in which the catalyst carrier composed of the multiple cylinder shown in FIG. 3 is housed and arranged in a cylindrical case.

FIG. 5 is a front view of an exhaust gas purifying catalyst carrier device in which a catalyst carrier according to the first embodiment is housed and arranged in a case.

FIG. 6 is a perspective view in which a part of the exhaust gas purification catalyst carrier device shown in FIG. 5 is cut away.

FIG. 7 is a perspective view showing a state in which a strip-shaped thin plate constituting an exhaust gas purifying catalyst carrier according to a second embodiment of the present invention is partially swirled.

FIG. 8 is a perspective view showing a state in which a catalyst carrier composed of a spiral body of the second embodiment is housed and arranged in a case.

FIG. 9 is a front view of an exhaust gas purifying catalyst carrier device in which a catalyst carrier according to a second embodiment is housed and arranged.

FIG. 10 is a partially enlarged perspective view of a strip-shaped thin plate provided with concave dimples as a turbulent flow generation portion on its surface.

FIG. 11 is a partially enlarged perspective view of a strip-shaped thin plate in which slits are engraved as a turbulent flow generation portion and the blade body is pushed up.

FIG. 12 is a front view of a multiple cylinder formed by stacking a plurality of cylinders with the strip-shaped thin plate shown in FIG.

FIG. 13 is an explanatory diagram of a turbulent flow state of wind in a multi-winding body having a turbulent flow generation section including a plurality of holes.

FIG. 14 is an explanatory view of a turbulent flow state of wind in a multi-winding body having a turbulent flow generation section composed of a plurality of dimples.

FIG. 15 is an explanatory diagram of a turbulent flow state of wind in a multi-winding body having a turbulent flow generation section including a plurality of blades.

[Fig. 16] Fig. 16 is an explanatory diagram of a wind flow state in a conventional honeycomb body having no turbulent flow generation portion.

FIG. 17 is a perspective view showing a state in which a flat steel plate and a corrugated steel plate are polymerized and wound to form a conventional exhaust gas purifying catalyst carrier.

FIG. 18 is a front view of an exhaust gas purifying catalyst carrier device in which a honeycomb body formed of the flat steel plate and the corrugated steel plate shown in FIG. 17 is housed and arranged in a cylindrical case.

[Explanation of symbols]

 10 Exhaust Gas Purification Catalyst Carrier 12 Multi-Wound Body 14 Cylindrical Case 16 Strip Thin Plate 18 Turbulent Flow Generation Section 20 Hole 22 Change Surface Section 26 Dimple 28 Slit 30 Blade Body 32 Gap 34 Multiple Cylindrical Body 40 Exhaust Gas Purification Catalyst Carrier Device 42 locking part 44 spacing holding part 46 locking rod 48 groove 50 spiral body

Claims (10)

[Claims] 1. A catalyst carrier for exhaust gas purification, which is housed and arranged in a cylindrical case having both ends opened while forming a multi-turn body, wherein the catalyst carrier is composed of a belt-shaped thin plate. A turbulent flow generating section is provided for generating turbulent flow in a state of being arranged in the case, and the turbulent flow generating section is provided with a plurality of holes or of a wind that flows in from the opening in a state of a multiple winding body arranged in the case. An exhaust gas purifying catalyst carrier comprising a changing surface portion for changing a flow. 2. The exhaust gas purifying apparatus according to claim 1, wherein the multiple winding body is a multiple cylinder body in which the strip-shaped thin plates are concentrically arranged so as to form a required gap therebetween in the case. Catalyst carrier. 3. The exhaust gas purifying catalyst carrier according to claim 1, wherein the multi-winding body comprises a spiral body in which the single strip-shaped thin plates are spirally arranged. 4. The exhaust gas purifying catalyst carrier according to claim 1, wherein the changing surface portion comprises concave dimples formed at a plurality of positions of the strip-shaped thin plate. 5. The exhaust gas purifying catalyst carrier according to claim 1, wherein the changing surface portion comprises a blade body in which a slit is formed in the strip-shaped thin plate and the inside of the slit is pushed up. 6. The exhaust gas purifying catalyst carrier according to claim 5, wherein the blade body is provided so as to change the flow of wind. 7. The catalyst carrier according to any one of claims 1 to 6, and a cylindrical case that accommodates these catalyst carriers and is open at both ends. An exhaust gas purifying catalyst carrier device using a catalyst carrier, which is provided with a locking portion for locking the detachment of the catalyst carrier housed inside from the case. 8. The exhaust gas purification using a catalyst carrier according to claim 7, wherein the locking portion is provided with a space holding portion for holding each wound body of the multiple wound body at a required space. Catalyst carrier device. 9. The locking portion comprises a locking rod arranged in a direction intersecting with a gas flow direction in the case, and the interval holding portion is formed on the locking rod, and the multi-winding body is provided. 9. An exhaust gas purifying catalyst carrier device using the catalyst carrier according to claim 7, which comprises a comb-shaped groove for holding and holding the edge of the catalyst carrier. 10. The catalyst carrier device for purifying exhaust gas using a catalyst carrier according to claim 9, wherein the locking rod is fixed so as to intersect the openings at both ends of the case.