• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An exhaust gas cleaning device (1) comprising a housing body (1A) comprising a plurality of housings (2, 3, 4, 5), and heat insulating rings (9) and heat insulators (15, 19) covering the housing body (1A) over a substantially complete area from an upstream side to a downstream side in an exhaust flow direction. The thermal insulators (15, 19) are located inwardly from connecting portions between the housings (2, 3, 4, 5), and the other thermal insulating rings (9) are located in a manner to bridge the connecting portions between the housings (2, 3, 4). , 5). With the above arrangement, the surface temperature of the housing body (1A) can be reliably prevented from becoming high. (Fig. 2)
    公开号:SE536044C2
    申请号:SE1150173
    申请日:2009-07-21
    公开日:2013-04-16
    发明作者:Hiroshi Yamamoto
    申请人:Komatsu Mfg Co Ltd；
    IPC主号:
    专利说明:

    536 044 2 wherein the heat insulating unit comprises first heat insulating units and second heat insulating units arranged in said number of housings, said first heat insulating units being located in the housings in a manner so as not to protrude from openings of the housings, and said second heat insulating heat units are placed in a way to bridge connecting sections between the houses.
    The term "substantially complete area" includes an area which has a small gap formed when the housing body is mounted because such a gap has no significant effect on the thermal insulation capacity.
    The term "placed inwardly" means that the first heat insulating units are housed inside the housings in such a way that they do not protrude from the openings in the housings.
    With the above arrangement, the heat insulating unit is continuously formed over the substantially complete area from the upstream side to the downstream side of the body, thus reliably preventing the surface temperature of the housing body of the exhaust gas purifying device from becoming high.
    With the above arrangement, the other heat insulating units are positioned in a manner to bridge the connecting portions. Thus, when each of the other heat insulating units is pre-attached to one end of one of the housings to be connected, the second housing can be controlled by the other heat insulating unit so that these housings are fitted to each other, thereby improving the mounting efficiency.
    In the exhaust gas cleaning device, it is preferred that each of the other heat insulating units comprises an inner ring element located on inner sides of the housings and a heat insulator placed between the inner ring element and inner surfaces of the housings.
    With the above arrangement, the inner surface of each of the other heat insulating units is provided with the ring element so that exhaust gas passing through the second heat insulating unit is prevented from easily coming into contact with the heat insulator placed between the inner ring insulator. 044 3 element and the inner surfaces of the housings, thereby preventing wear of the heat insulator and extending the life of the heat insulator. In the exhaust gas cleaning device, it is preferred that each of the other heat insulating units comprises an outer ring element placed between the inner surfaces of the housings and the heat insulator.
    With the above-mentioned arrangement, the outer ring element is arranged between the thermal insulator and the inner surfaces of the housings. Thus, when the housings are fitted to each other, the inner surface of one of the housings is in contact with an outer surface of the outer ring element, whereby the heat insulator is advantageously prevented from, for example, getting stuck between the housings.
    In the exhaust gas purification device, it is advantageous that the inner ring element and the outer ring element are separated from each other.
    The term "separated" means separated in a direction perpendicular to the exhaust direction.
    With the above-mentioned arrangement, the inner ring element and the outer ring element are separated from each other. Since the inner ring member and the outer ring member are not in contact with each other, heat of the inner ring member can be prevented from being transferred to the outer ring member. In the exhaust gas cleaning device, it is advantageous that the inner ring element can be provided with outer flanges to have a concave cross-section. With the above-mentioned arrangement, the inner ring element is provided with the outer ends to have a concave cross-section. The outer flanges of the inner ring member act to prevent the heat insulator from projecting outwards. Furthermore, the exhaust gas passing through the second thermal insulating unit is more reliably prevented from easily coming into contact with the thermal insulator, thereby preventing wear of the thermal insulator and extending the life of the thermal insulator in a more reliable manner.
    According to another aspect of the invention, an exhaust gas cleaning device comprises a housing body comprising a plurality of housings, and a heat insulating unit is provided to an inner surface of the housing body over a substantially complete area from an upstream sledge to a downstream side in an exhaust direction in which the first heat insulating unit comprises heat insulating units and other heat insulating units arranged in said plurality of housings, the first heat insulating units being located in the housings in a manner so as not to protrude from openings of the housings, and the second heat insulating units the heating units are located in a manner for bridging connecting portions between the housings, wherein among said hus ertal housings is a housing located on an upstream end in the exhaust flow direction provided with an inflow section into which exhaust gas flows in a radial direction of the housing. and a housing located on a downstream end in the exhaust flow direction provided with an outflow section from which exhaust gas flows in a radial direction of the housing, each of the housings provided with the inflow section and the outflow section having a double wall structure of an inner wall plate and an outer wall plate, the first heat-insulating unit is inserted between the inner wall plate and the outer wall plate.
    With the above arrangement, the housing body is covered by the insulating unit over the substantially complete area from the upstream side to the downstream side in the exhaust flow direction, and the first heat insulating units are inserted between the inner wall plates and the outer wall plates placed on both end surfaces of the housing body. The housing body is thus completely covered by means of the heat-insulating unit. Even when exhaust gas having a high temperature passes through the inflow section and the outflow section radially arranged to the housings located at both ends of the housing body, the surface temperature of the housing body can be reliably prevented from becoming high.
    The inlet section and the outflow section are located in a way to allow exhaust gas to flow into and out of the housings in the radial direction so that an exhaust pipe or the like can be placed collectively and thus reduce a space for the exhaust pipe.
    Brief Description of the Drawings Fig. 1 is a perspective view showing a complete exhaust gas purification device according to a first exemplary embodiment of the invention.
    Fig. 2 is an illustration seen in a direction of the arrows A-A in Fig. 1.
    Fig. 3 is a cross-sectional view showing a primary part according to the first exemplary embodiment. Fig. 4 is a cross-sectional view showing a housing as part of the exhaust gas purification device.
    Fig. 5 is a cross-sectional view showing a primary part of an exhaust gas purification device according to a second exemplary embodiment of the invention.
    F ig. 6 is a cross-sectional view showing a primary part according to a third exemplary embodiment of the invention.
    Fig. 7 is a cross-sectional view showing a primary part according to a fourth exemplary embodiment of the invention.
    Fig. 8 is a cross-sectional view showing a primary part according to a fifth exemplary embodiment of the invention.
    Fig. 6 is a cross-sectional view showing a primary part according to a sixth exemplary embodiment of the invention.
    Detailed Description of Exemplary Embodiments of the Invention Exemplary embodiments of the invention will be described below with reference to the accompanying drawings. In a second exemplary embodiment described below and subsequent embodiments, the same reference numerals are used for components identical to or similar to those in the first exemplary embodiment described below to facilitate or omit the explanation thereof.
    First Exemplary Embodiment A first exemplary embodiment of the invention will be described below with reference to the accompanying drawings.
    Hereinafter, an upstream side in an exhaust flow direction is referred to as an "upstream side" and a downstream side in the exhaust flow direction is a downstream side "for simplicity.
    Fig. 1 is a perspective view showing a complete exhaust gas purification device 1 according to this exemplary embodiment. Fig. 2 is an illustration seen in a direction of the arrows A-Ai. Fig. 1. In Fig. 1, the exhaust gas purification device 1 is arranged between exhaust pipes of a diesel engine (not shown) (hereinafter referred to as an "engine") PM contained in exhaust gas and provided with a housing body 1 A. The housing body 1A comprises a cylindrical housing 2 connected to the exhaust pipe of the engine, a cylindrical housing 3 located on a downstream side of the housing 2, a cylindrical housing 4 located on a downstream side of the housing 3, and a housing 5 located on the lower downstream side and connected to an outlet pipe (not shown).
    The housings 2 and 5 are located on both ends of the housing body 1A and each comprises a cylindrical outer periphery provided with a side wall 8.
    The inner spaces of the housings 2 and 5 act separately as an inlet chamber 11 and outlet chamber 12. The housings 2 located on the upstream end are provided with an inflow section 21 into which exhaust gas flows in the radial direction of the housing 2. The housing 5 located on the downstream end is provided with an outlet section 51 from which exhaust gas flows in the radial direction of the housing 5. On both end surfaces of the housing body 1A, the side walls 8 of each of the housings 2 and 5 have a double wall structure having an inner wall plate 13 and an outer wall plate 14. heat insulator 15 made of glass fi ber as a first heat insulating unit is inserted between the inner wall plate 13 and the outer wall plate 14. Similarly, the cylindrical portion of each of the housings 2 and 5 has a double wall structure having an inner cylinder 16 and an outer cylinder 17. The heat insulator 15 is also inserted between the inner cylinder 16 and the outer cylinder 17. With this arrangement, even when exhaust gas passes through the inlet chamber 11 and out the vent chamber 12, heat from the exhaust gas is blocked by the heat insulator 15 to prevent heat transfer to outer surfaces of the housings 2 and 5. A flange connection 6 formed in one piece with an exposed portion of the inner cylinder 16 is formed on an opening end of each of the housings 2 and 5.
    In the cylindrical housing 3, an oxidizing catalyst 31 is placed to oxidize dosing fuel to obtain heat therefrom, and annular metal wires in stainless steel 81 and stoppers 82 are arranged on both sides of the oxidizing catalyst 31. The stops 82 press the oxidizing catalyst 31 via the steel wire 81 to prevent the oxidizing catalyst 31 from projecting from the ends of the housing 3.
    Similarly, a soot filter 41 is housed in the cylindrical housing 4 to capture PM in exhaust gas, and the annular metal wires in stainless steel 81 and the stops 82 are arranged on both sides of the soot filter 41. 10 15 20 25 30 535 G44 7 The housings 3 and 4 have a single wall structure. Thermal insulators 19 made of ceramic som as the first thermal insulating units are inserted between the inner surface of the housing 3 and the oxidizing catalyst 31 housing the housing 3, and between an inner surface of the housing 4 and the soot filter 41. With this arrangement heat from the exhaust gas passing is prevented through the oxidizing catalyst 31 and the soot filter from being transferred to outer surfaces of the skin 3 and 4. In the same way, the end connections 6 are formed in one piece on open ends of both sides in each of the housings 3 and 4.
    In the housings 2 to 5 as described above, the sealing connections 6 facing each other are connected to each other by a sealing material 65 and are connected to each other by means of a bolt 61 which penetrates the flanges 6 and a nut 62 which is screwed onto the bolt 61. The sealing material 65, which is made of shale graphite which exhibits high thermal resistance, is placed in a manner to prevent exhaust gas passing through the exhaust gas purification device 1 from leaking into the atmosphere. When housings 2 to 5 are connected, heat insulating rings 9 are housed as other heat insulating units to bridge the interiors of housings 2 to 5 separately as shown in Figs. 2 and 3.
    A heat insulating ring 9A is specifically located between the housings 2 and 3 in a manner to protrude beyond the end connection 6 of the housing 2 to approach an inflow end of the oxidizing catalyst 31. A heat insulating ring 9B is placed between the housings 3 and 4 to approaching an outlet end of the oxidizing catalyst 31 and an inlet end of the soot filter 41. A heat insulating ring 9G is placed between the housings 4 and 5 in a manner to project beyond the flange connection 6 of the housing 5 to approach an outlet end of the soot filter 41.
    The heat insulating rings 9 (9A, 9B, 9G) each have the same overall structure except for different lengths of the exhaust direction. Specifically, as shown in an enlarged manner in Fig. 3 (in the figure, the heat insulating ring 9B is shown as a representative example), each of the heat insulating rings 9 comprises an outer ring element of stainless steel 91 which abuts an inner surface of each of the housings 2 to 5, a stainless steel inner ring member 92 formed to have a concave cross-section and having a pair of outer flanges 93, a thermal insulator 94 made of ceramic fibers and inserted between the outer the ring member 91 and the inner ring member 92. The thermal insulator 94 is also formed in a cylindrical shape and has an inner diameter substantially equal to an outer diameter of a cylindrical portion of the inner ring member 92. In each of the heat insulating rings 9, the inner ring member 92 is housed in the outer ring member 91 while the thermal insulator 94 having a predetermined thickness is fitted on the outer periphery of the cylindrical portion of the inner ring member 92. As a result, the thermal insulator 94 is pressed against the outer ring member 91 by the inner ring member 92 to be inserted between the respective members 91 and 92 while being compressed. A reaction force at this time prevents positional displacement of the inner ring member 92 relative to the outer ring member 91. The heat insulating rings 9 can be pre-assembled for easy handling. Inserting the thermal insulator 94 between the outer flanges 93 further prevents the thermal insulator 94 from displacing.
    The heat-insulating rings 9 are each housed in the housings 2 to 5 after the elements 91, 92 and 94 have been mounted. At this time, the outer ring member 91 is welded to an inner periphery of each of the housings 2 to 5.
    Welded parts will be described in detail below. In mounted friend-insulating rings 9, the inner ring element 92 and the outer ring element 91 are not in contact with each other. A thickness of the thermal insulator 94 and a height of the outer flanges 93 of the non-ring member 92 are specifically selected so that the inner ring member 92 and the outer ring member 91 are not in contact with each other with respect to an estimated compressed amount of the thermal insulator 94. Also consequently, if exhaust gas passing through the heat insulating rings 9 is in direct contact with the inner ring member 92, heat at this time is prevented from being transferred from the inner ring member 92 to the outer ring member 91 and is advantageously blocked by the heat insulator 94. one of the heat insulating rings 9 overlaps the heat insulating ring 9A radially with the heat insulator 15 of the housing 2 on the upstream side and is adjacent the thermal insulator 19 of the housing 3 through the metal wire 81 and the stopper 82 on the downstream side. The heat insulating ring 9B is adjacent the thermal insulator 19 of the housing 3 through the metal wire 10 and the stopper 82 on the upstream side and is adjacent the thermal insulator 19 of the housing 4 through the metal wire 81 and the stopper 82 on the downstream side.
    The heat insulating ring 9C is adjacent the thermal insulator 19 of the housing 4 through the metal wire 81 and the stopper 82 on the upstream side and overlaps radially with the thermal insulator 15 of the housing 5 on the downstream side. As for the term "adjacent", the thermal insulating rings 9 may be in contact with the thermal insulators 19 or not be in contact with the thermal insulators 19.
    With this arrangement, the substantially complete housing body 1A of the exhaust gas purifier 1 from the upstream side to the downstream side is substantially covered by thermal insulators 15, 19, 94. Even the housings 3 and 4 having no double wall structure can practically realize a double wall structure in an excellent manner with heat to use the heat insulating rings 9. Consequently, the outer surfaces of all the housings 2 to 5 are prevented from being easily heated to a high temperature.
    The heat insulating ring 9A among the heat insulating rings 9 has a larger engagement margin with the inner cylinder 16 of the housing 2 than with the housing 3. The heat insulating ring 9A is housed in the inner cylinder 16 in advance.
    The heat insulating ring 9B has a larger engagement margin with the housing 4 than with the housing 3. The heat insulating ring 9B is housed in the housing 4 in advance.
    The heat insulating ring 9C has a larger engagement margin with the housing 5 than with the housing 4. The heat insulating ring 9C is housed in the housing 5 in advance.
    The outer ring elements 91 of the heat insulating rings 9 are each welded to the housings 2 to 5 at a larger engagement margin between the heat insulating rings 9 and each of the housings 2 to 5. The outer ring member 91 of the heat insulating ring 9A is specifically welded to four welding holes (not shown) formed on the outer surface of the housing 2. The outer ring member 91 of the heat insulating ring 9B is welded to the welding holes of the housing 4. The outer ring member 91 of the heat insulating ring 9C is welded to the welding hole of the housing 5.
    Accordingly, when mounting the housing body 1A by coupling the housings 2 to 5, a part of the heat insulating ring 9A projects from an opening of the housing 2. An outer periphery of the projecting heat insulating ring 9A is fitted to a In other words, an outflow end of the housing 2 and the inflow end of the housing 3 are fitted to each other while being controlled by the heat insulating ring 9A.
    Similarly, as shown in Fig. 4, a portion of the heat insulating ring 9B projects from an opening of an inflow end of the housing 4. An outer periphery of the protruding heat insulating ring 9B is fitted to an outward end of the housing 3 and thereby connecting the housings 3 and 4. In other words, the outflow end of the housing 3 and the inflow end of the housing 4 are also fitted to each other while being controlled by means of the heat insulating ring 98.
    A portion of the heat insulating ring 9C projects further from an opening of an inlet end of the housing 5. An outer periphery of the protruding heat insulating ring 9C is fitted to an outflow end of the housing 4, thereby fitting the housings 5 and 4 to each other.
    For the above-mentioned fitting connection, the heat-insulating rings 9A and 9C are specifically preselected separately in the housings 2 and 5 (ie both sides of the housing body 1A) in a manner to project from the housings 2 and 5 to face each other. No heat insulating rings 9 are provided in the housing 3 which houses the oxidizing catalyst. In the housing 4 housing the soot filter, the heat insulating ring 9B is provided in advance only on the upstream side in a manner to protrude from the housing 4. When the housings 2 to 5 are arranged in a correct order, consequently the housing in which the soot filter is housed is prevented from connected at a rearwardly facing position (ie the inlet end and outflow end of the soot filter are rearwardly facing) so that an orientation of the housing so that connection can be constantly fixated.
    A sensor bulge 101 is provided to each of the housings 2 and 5 of the housing body 1 to attach a temperature sensor (not shown) for measuring. the temperature inside the inlet chamber 11 and the outlet chamber 12. The sensor bulge 101 is attached to the inner cylinder 16. On the outer cylinder 17 an opening 18 is formed at a position corresponding to the sensor bulge 101. A sensor bulge 102 is similarly arranged to the housing 5 at a position adjacent the sensor bulge 101. A stable tube 71 such as a steel tube into which exhaust fl deserts are attached to the sensor bulge 102. Thick disk sensor bulges 103 and 104 are provided on the outer surface when the exhaust inlet end of the housing 4. The sensor bulge 103 is attached to a temperature sensor (not shown) which measures an exhaust temperature at the inflow end of the soot filter 41. The sensor bulge 104 is attached to a stable pipe 72, such as a steel pipe, into which exhaust gas flows from the inlet end of the soot filter 41. The pipe 72 and pipes 41 described above are connected to a differential pressure sensor 7. In this exemplary embodiment, the differential pressure sensor 7 is located n is the exhaust outlet end of the housing 4 and is attached to the end connection 6 near the outlet end of the housing 4 by means of the bolt 61 and the nut 62 through a bracket 63.
    The differential pressure sensor 7 detects a pressure difference between the inlet end and the outflow end of the soot filter 41. In the differential pressure sensor 7 a diaphragm provided with a strain gauge is placed. The diaphragm is displaced by exhaust gas fl into the pipes 71 and 72 and the electrical resistance of the strain gauge changes in response to the displacement of the diaphragm.
    The differential pressure can thus be detected based on the changed electrical resistance. Inside the housing 4, the soot filter 41 causes a pressure loss of exhaust gas, a pressure at the inlet end of the soot filter (ie a pressure in the soot filter 41 near the sensor bulge 104) is greater than a pressure at the outflow end of the soot filter 41 (ie a pressure in the soot filter 41 near the sensor bulge 102). When Pm starts to clog the soot filter 41, the pressure loss, ie. the differential pressure between the inflow end and the outflow end of the soot filter 41, greater. A degree of clogging of the soot filter 41 can be adjusted based on the differential pressure.
    The connected differential sensor 7 and the tubes 71 and 72 are placed in a manner for bridging over a connecting portion between the housings 4 and 5.
    A dimension of the tube 72 is larger than that of the tube 71. In this exemplary embodiment with different dimensions of the tubes 71 and 72, consequently, the orientation of the housing 4 for connection, to which the tube 72 is attached, is fixedly mounted relative to the housing 5. to which the tube 71 is attached.
    In other words, when the housing 4 is connected to the housing 5 in such a way that the upstream and downstream are reversed, the sensor bulges 102 and 104 end up too close to each other, whereby the stable tubes 71 and 72 can not be connected to the sensor bulges 102 and 104 and the differential pressure sensor. 7 10 15 20 25 30 535 044 12 can not be attached to the housing 4. In the light of the above, in the same way as the advantage of the above-mentioned pass coupling, the housing 4 housing the soot filter 41 can be firmly coupled in the axed orientation and prevented from being attached to a way so that the upstream and downstream are reversed. In an engine compartment in which the engine is housed, the exhaust gas cleaning device 1 according to the invention can be attached to a frame and an engine hood which constitutes an engine compartment, or attached to an upper side of an engine or the like. An attachment position or the like can be determined in a suitable manner at the time of attachment of the exhaust gas purification device 1.
    According to this exemplary embodiment, the housing body 1A of the exhaust gas cleaning device 1 is covered by thermal insulators 15, 19 and 94 so that the surface temperature of the housing body 1A is reliably prevented from becoming high due to exhaust gas passing through the exhaust gas cleaning device 1.
    Second Exemplary Embodiment Fig. 5 shows a heat insulating ring 9 according to a second exemplary embodiment. In Fig. 5, the connecting portion between the housings 3 and 4 is shown as a representative example so that the same heat insulating ring 9 is used for any other connecting portion. The same applies to the third to sixth exemplary embodiments described below.
    The heat insulating ring 9 according to this exemplary embodiment comprises the inner ring element in stainless steel 92 having a concave cross section, and the heat insulator 94 made of ceramic is selected in the inner ring element 92. The outer ring element 91 according to the first exemplary embodiment is not arranged. to the inner ring member 92.
    The thermal insulator 94 which also has a predetermined thickness is pressed against the inner surfaces of one of the housings 2 to 5 by means of the inner ring member 92 to be compressed between the inner surface of the housing 4 and the inner ring member 92. Since the inner ring member 92 receives the pressure from the thermal insulator 94, the inner ring member 92 can be pre-attached to the housing 4 along the thermal insulator without displacement relative to the housing 4. The inner ring member 92 and the inner surfaces of those of the housings 2 to 5 are not in contact in the same manner as in the first exemplary embodiment. . The heat of the inner ring member 92 is thus prevented from being transferred to those of the housings 2 to 5.
    In this exemplary embodiment, just as in the above-mentioned first exemplary embodiment, the entire exhaust gas cleaning device 1 is continuously covered by thermal insulators 15, 19, 94 and thus the surface temperature of the entire exhaust gas cleaning device 1 is prevented from becoming high.
    Third Exemplary Embodiment Fig. 6 shows a heat insulating ring 9 according to a third exemplary embodiment.
    The heat insulating ring 9 comprises an inner ring element in stainless steel 95 and a friend insulator 95 inserted between the inner ring element 95 and the housings 3 and 4. The inner ring element 95 has an inner concave cross section with is formed in a cylindrical shape without the outer flanges 93 ( Fig. 3). The second arrangement is the same as in the second exemplary embodiment.
    In the same way in this exemplary embodiment, the surface temperature of the entire exhaust gas cleaning device 1 can be reliably prevented from becoming high.
    Hard Exemplary Embodiments Fig. 7 shows a heat insulating ring 9 according to a fourth exemplary embodiment.
    The heat insulating ring 9 according to this exemplary embodiment comprises the cylindrical outer ring member 91 described in the first exemplary embodiment and the cylindrical inner ring member 95 described in the third exemplary embodiment.
    In the same way in this exemplary embodiment, the surface temperature of the entire exhaust gas cleaning device 1 can be reliably prevented from becoming high so that the same advantages as those of the first exemplary embodiment described above can be achieved. 10 15 20 25 30 536 044 14 Fifth Exemplary Embodiment Fig. 8 shows a heat insulating ring 9 according to a fifth exemplary embodiment.
    Unlike the first exemplary embodiment, the heat insulating ring 9 according to this exemplary embodiment uses an inner ring member 97 which is in contact with the outer ring member 91 and thus surrounds the heat insulator 94 within a space between the outer ring member 91 and the inner ring member 97.
    In this exemplary embodiment, since the thermal insulator 94 is fully housed, there is no possibility of exposing the thermal insulator to the exhaust gas. The wear of the thermal insulator 94 can thus be suppressed and thus prolong the service life.
    Sixth Exemplary Embodiment Fig. 9 shows a sixth exemplary embodiment. In housings 2 to 5 according to this exemplary embodiment, the sealing material 65 is inserted between the end connections 6 and the end connections 6 are connected by fastening by means of a v-shaped clamp 64. With the above-mentioned arrangement, the housings 2 to 5 can advantageously be connected in the same way as in the above-mentioned exemplary embodiments. Although the best arrangements, procedures and the like for carrying out the invention have been described above, the invention is not limited thereto. In other words, although the invention has been described and illustrated particularly in relation to specific embodiments, those skilled in the art could make various modifications in form, number or other details of the above embodiment without departing from the technical idea or object of the invention.
    Descriptions regarding form or number or the like as shown above are therefore given by way of example to enable a simple understanding of the invention, and do not limit the invention. Descriptions using names of components with limitations on shape or number or the like removed in part or in whole are included in the invention. Although the housings 2 and 3 are formed separately in the above-mentioned exemplary embodiments, the housings 2 and 3 can be formed in one piece. Although the exhaust gas purification device 1 according to the above-mentioned exemplary embodiments is provided with the oxidizing catalyst 31, the oxidizing catalyst 31 may be omitted due to another regeneration process of the salt filter 41. Although the heat insulator 94 is made of ceramic fibers in the above-mentioned respective exemplary embodiments For example, the thermal insulator 94 may be made of glass or other suitable material.
    Industrial Applicability The invention is suitably useful as an exhaust gas purification device of an internal combustion engine installed in a construction machine, an earth-moving machine, an agricultural machine, a power generator, a transport vehicle and the like.
    Explanation of reference numeral 1 ... exhaust gas purifier 1A. . . house body 2 to 5 ... house 9. .Close insulating ring 13. _. inner wall plate 14 ... outer wall plate 15 and 19.. .heat insulator 21 ... in fl fate section 51 ... outflow section 91 ... outer ring element 92, 95 and 97 inner ring element 93 ... outer flange 94. _ .heat insulator
    权利要求:
    Claims (7)
    [1]
    Exhaust gas cleaning device (1), comprising a housing body (1A) comprising a number of interconnected housings (2, 3, 4, 5), a thermal insulation (9, 15, 19) arranged to an inner surface of the housing body (1A). 1A) over a substantially complete area from an upstream side to a downstream side in an exhaust direction, a soot filter (41) arranged in one of said housings (2, 3, 4, 5), characterized in that said thermal insulation (9, 15, 19) comprises first heat insulating units (15, 19) and second heat insulating units (9) arranged alternately in said housing (2, 3, 4, 5), said first heat insulating units (15, 19) being located in a respective housing (2, 3, 4, 5) without projecting into nearby houses while said other heat insulating heating units (9) are located in a respective house to bridge connecting portions between the houses (2. 3, 4, 5,) and thereby project into nearby houses , and that the soot filter (41) is surrounded by a first heat insulating unit (15, 19).
    [2]
    Exhaust gas cleaning device (1) according to claim 1, wherein each of the other heat insulating units (9) comprises an inner ring element (92, 95, 97) placed on inner sides of the housings (2, 4, 5), and a heat insulator (94) located between the inner ring member (92, 95, 97) and inner surfaces of the housings (2, 4, 5).
    [3]
    Exhaust gas cleaning device (1) according to claim 2, wherein each of the other heat insulating units (9) comprises an outer ring element (91) located between the inner surfaces of the housings (2, 4, 5) and the heat insulator (94).
    [4]
    Exhaust gas cleaning device (1) according to claim 3, wherein the inner ring element (92, 95) and the outer ring element (91) are separated from each other. 10 15 20 25 536 044 17
    [5]
    Exhaust gas cleaning device (1) according to claim 3 or 4, wherein the inner ring element (92, 97) is provided with outer flanges (93) which extend towards the outer ring element (92, 97) and surround the heat insulator (94).
    [6]
    Exhaust gas cleaning device (1) according to claim 1, wherein among said hus ertal housings (2, 3, 4, 5) is a housing (2) located on an upstream end in the exhaust fl direction provided with an inflow section (21) into which exhaust gas flows in a radial direction of the housing (2), and a housing (5) located on a downstream end in the exhaust flow direction provided with an outlet section (51) from which exhaust gas flows in a radial direction of the housing (5), a side wall (8) of the housing (2) provided with the inflow section (21) and located on the upstream end in the exhaust flow direction and a side wall (8) of the housing (5) provided with an outflow section (51) and located on the downstream end in the exhaust flow direction has a double wall structure of an inner wall plate (13) arranged inside the respective housing (2, 5) and an outer wall plate defining an outer surface of the respective housing (2, 5), and a first heat insulating unit (15, 19) is inserted between the respective inner wall plate (13) and the outer wall plate (14).
    [7]
    Exhaust gas cleaning device (1) according to claim 1, wherein said plurality of housings comprise a first housing (4) in which the soot filter (41) is housed, a second housing (3) connected to the first housing (4) on an upstream side in the exhaust gas direction, and a third housing (5) connected to the first housing (4) on a downstream side in the exhaust flow direction, a second heat insulating unit (9) projecting from the first housing (4) into the second housing (3), and a second heat insulating unit (9) projects the third housing (5) into the first housing (4).
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    US8535611B2|2013-09-17|
    JP2010043545A|2010-02-25|
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    法律状态:
    2016-03-01| NUG| Patent has lapsed|
    优先权:
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    JP2008206129A|JP5079630B2|2008-08-08|2008-08-08|Exhaust gas purification device|
    PCT/JP2009/063018|WO2010016380A1|2008-08-08|2009-07-21|Exhaust gas purifying device|
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