WO2014156426A1 - Exhaust gas purification device - Google Patents

Exhaust gas purification device Download PDF

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Publication number
WO2014156426A1
WO2014156426A1 PCT/JP2014/054463 JP2014054463W WO2014156426A1 WO 2014156426 A1 WO2014156426 A1 WO 2014156426A1 JP 2014054463 W JP2014054463 W JP 2014054463W WO 2014156426 A1 WO2014156426 A1 WO 2014156426A1
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WO
WIPO (PCT)
Prior art keywords
catalyst
catalyst cassette
cassette
wedge
shaped member
Prior art date
Application number
PCT/JP2014/054463
Other languages
French (fr)
Japanese (ja)
Inventor
横山　哲也
義典 福井
Original Assignee
ヤンマー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ヤンマー株式会社 filed Critical ヤンマー株式会社
Publication of WO2014156426A1 publication Critical patent/WO2014156426A1/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2878—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using non-elastic means for retaining catalyst body in the housing, e.g. a metal chamfer, or by corrugation or deformation of the metal housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
    • F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
    • F01N3/2066—Selective catalytic reduction [SCR]
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2875—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration by using elastic means, e.g. spring leaves, for retaining catalyst body in the housing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2350/00—Arrangements for fitting catalyst support or particle filter element in the housing
    • F01N2350/02—Fitting ceramic monoliths in a metallic housing
    • F01N2350/04—Fitting ceramic monoliths in a metallic housing with means compensating thermal expansion
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N2450/00—Methods or apparatus for fitting, inserting or repairing different elements
    • F01N2450/30—Removable or rechangeable blocks or cartridges, e.g. for filters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the present invention relates to an exhaust purification device for an internal combustion engine.
  • NOx nitrogen oxides
  • SCR catalyst selective reduction type NOx catalyst
  • the NOx catalyst of the catalytic reactor is formed of a metal welded structure in which a material containing an active component such as V or Cr in an oxide carrier such as Ti is formed in a substantially rectangular parallelepiped honeycomb structure. (Hereinafter simply referred to as a catalyst cassette) is used. Some of the catalyst cassettes are arranged in the catalyst reactor and fixed to the catalyst reactor so as to be detachable by a push screw or the like. For example, as described in Patent Document 1.
  • Patent Document 1 An exhaust gas purification apparatus as described in Patent Document 1 is fixed to a catalytic reactor via a glass fiber having excellent heat resistance and flexibility in order to absorb manufacturing errors of a catalyst cassette having a welded structure.
  • the fixing force between the catalyst reactor and the catalyst cassette decreases due to deterioration with time of glass fiber or the like, and the catalyst cassette moves or breaks in the catalyst reactor.
  • the present invention has been made to solve such problems, and suppresses movement and breakage of the catalyst cassette due to thermal expansion, vibration, etc., even if gaps due to manufacturing errors of the catalyst cassette or catalyst reactor vary.
  • An object of the present invention is to provide an exhaust emission control device that can perform such a process.
  • an exhaust gas purification apparatus including a catalyst reactor in which a plurality of catalyst cassettes in which a catalyst is accommodated can be detachably mounted, the catalyst reactor is mounted adjacent to the opening.
  • a wedge-shaped member is inserted into the gap between the catalyst cassettes inserted, and the catalyst cassette inserted is energized by a lid member that closes the opening.
  • the wedge-shaped member is supported by the catalytic reactor so as to be movable in the insertion direction of the wedge-shaped member.
  • the wedge-shaped member is supported by the catalytic reactor via a connecting member configured to be extendable and contractable by a screw mechanism.
  • the wedge-shaped member is biased in the insertion direction of the wedge-shaped member by a spring mechanism.
  • the lid member is provided with an elastic member for biasing the catalyst cassette.
  • the wedge-shaped member restricts the insertion direction of the wedge-shaped member and the movement in the direction perpendicular to the insertion direction
  • the lid member restricts the movement in the direction perpendicular to both the directions.
  • each catalyst cassette is fixed integrally with the catalyst reactor via the wedge-shaped member. Therefore, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
  • the wedge effect of the wedge-shaped member is increased by the screw mechanism, and each catalyst cassette is firmly fixed. Therefore, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
  • the urging force by the wedge-shaped member is maintained even if each catalyst cassette or catalyst reactor is thermally expanded. Therefore, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
  • the urging force by the lid member is maintained even if each catalyst cassette or catalyst reactor is thermally expanded. Therefore, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of the cassette due to thermal expansion or vibration can be suppressed.
  • FIG. Schematic which shows the whole structure of the exhaust gas purification apparatus which concerns on this invention.
  • A Front view of the catalytic reactor in the first embodiment of the exhaust purification apparatus according to the present invention
  • A The figure which shows the wedge-shaped member in 1st embodiment of the exhaust gas purification apparatus which concerns on this invention
  • upstream side indicates the upstream side in the fluid flow direction
  • downstream side indicates the downstream side in the fluid flow direction
  • the exhaust purification device 1 purifies exhaust discharged from an engine 31 that is a power source such as a generator 33.
  • the exhaust purification device 1 is provided in an exhaust pipe 11 connected to the engine 31.
  • the exhaust purification device 1 includes a urea water injection nozzle 2, a urea supply channel 3, an air supply channel 4, a pressurized air valve 5, an air tank 6, a pressurized air supply pump (compressor) 7, a switching valve 8, and urea water supply.
  • a pump 9, a urea water tank 10, a catalytic reactor 12, a control device 30 and the like are provided.
  • the urea water injection nozzle 2 supplies urea water into the exhaust pipe 11 or the catalytic reactor 12.
  • the urea water injection nozzle 2 is formed of a tubular member, and is provided so that one side (downstream side) thereof is inserted from the outside of the exhaust pipe 11 or the catalytic reactor 12 into the inside.
  • a urea supply flow path 3 that is a flow path of urea water is connected to the urea water injection nozzle 2.
  • the urea water injection nozzle 2 is connected to an air supply flow path 4 that is a flow path of pressurized air.
  • the pressurized air valve 5 communicates or blocks the flow path of the pressurized air.
  • the pressurized air valve 5 is provided in the air supply flow path 4.
  • the pressurized air valve 5 is composed of an electromagnetic valve, and a solenoid is connected to the control device 30.
  • the pressurized air valve 5 is configured to be able to supply pressurized air pressurized to the air tank 6 by a pressurized air supply pump (compressor) 7 to the urea water injection nozzle 2 by sliding a spool (not shown).
  • the switching valve 8 switches the urea water flow path.
  • the switching valve 8 is provided on the downstream side of the urea water supply pump 9 in the air supply flow path 4.
  • the switching valve 8 is configured such that the urea water in the urea water tank 10 can be supplied to the urea water injection nozzle 2 by the urea water supply pump 9 by sliding a spool (not shown).
  • the catalytic reactor 12 selectively reduces NOx in the exhaust gas with a NOx catalyst arranged inside.
  • the catalytic reactor 12 is provided in the middle of the exhaust pipe 11 connected to the engine 31 and downstream of the urea water injection nozzle 2.
  • the catalyst reactor 12 includes a first catalyst cassette 14, a second catalyst cassette 15, a third catalyst cassette 16, a fourth catalyst cassette 17, and a fifth catalyst cassette in which a NOx catalyst is incorporated in a metal frame inside a housing 13. 18, a sixth catalyst cassette 19, a seventh catalyst cassette 20, and an eighth catalyst cassette 21 (hereinafter simply referred to as “each catalyst cassette”) are arranged.
  • Control device 30 controls pressurized air valve 5, switching valve 8, urea water supply pump 9, and the like.
  • the control device 30 stores various programs and data for controlling the pressurized air valve 5, the switching valve 8, the urea water supply pump 9, and the like.
  • the control device 30 may be configured such that a CPU, a ROM, a RAM, an HDD, and the like are connected by a bus, or may be configured by a one-chip LSI or the like.
  • the control device 30 can also be configured integrally with an ECU 32 that controls the engine 31.
  • the control device 30 controls the pressurized air valve 5, the switching valve 8, the urea water supply pump 9, and the like to inject urea water into the exhaust pipe 11.
  • Ammonia is generated from the urea water injected by the heat of the exhaust.
  • the exhaust purification apparatus 1 reduces NOx to nitrogen and water by the NOx catalyst incorporated in each catalyst cassette of the ammonia and catalytic reactor 12.
  • the catalyst reactor 12 includes a housing 13, each catalyst cassette, a first wedge-shaped member 22, a second wedge-shaped member 23, a third wedge-shaped member 24, and a fourth wedge-shaped member 25 (hereinafter referred to as “the first reactor”).
  • the first lid member 26 and the second lid member 27 are simply provided as “each wedge-shaped member”.
  • An exhaust pipe 11 is connected to one end of the housing 13, and the other end of the housing 13 is opened to the outside through the exhaust pipe 11. That is, the housing 13 is configured as an exhaust passage through which exhaust from the engine 31 flows from one side (upstream side) to the other side (downstream side) (see the black arrow in FIG. 2).
  • a first opening 13a and a second opening 13b are formed on the side surface of the housing 13 in order from the upstream side.
  • the housing 13 also includes a first mounting frame 13c that removably supports the catalyst cassette inserted from the first opening 13a, and a second that removably supports the catalyst cassette inserted from the second opening 13b.
  • a mounting frame 13d is provided.
  • the first opening 13 a is configured to be able to be closed by the first lid member 26.
  • the second opening 13b is configured to be closed by the second lid member 27.
  • the NOx catalyst is a material in which a metal-containing material such as alumina, zirconia, vanadia / titania or zeolite is formed into a substantially rectangular parallelepiped having a large number of lattice-shaped through holes (in FIG. 3).
  • a metal-containing material such as alumina, zirconia, vanadia / titania or zeolite
  • Each catalyst cassette is configured such that a side surface other than the side surface where the through hole of the NOx catalyst is open is covered with a metal frame (see B in FIG. 3).
  • the first catalyst cassette 14 and the second catalyst cassette 15 are loaded so that the side surfaces covered by the frame are adjacent to each other and supported by the first mounting frame 13c in the housing 13 from the first opening 13a. Is done. Further, the third catalyst cassette 16 and the fourth catalyst cassette 17 are supported by the first mounting frame 13c in the housing 13 from the first opening 13a with the side surfaces covered with the frame bodies adjacent to each other. It is inserted. At this time, the third catalyst cassette 16 is disposed adjacent to the first catalyst cassette 14. The fourth catalyst cassette 17 is disposed adjacent to the second catalyst cassette 15.
  • the fifth catalyst cassette 18 and the sixth catalyst cassette 19, and the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are supported by the second mounting frame 13d in the housing 13 from the second opening 13b. It is inserted so that. At this time, the seventh catalyst cassette 20 is disposed adjacent to the fifth catalyst cassette 18. The eighth catalyst cassette 21 is disposed adjacent to the sixth catalyst cassette 19.
  • Each catalyst cassette is arranged so that the axial direction of the through hole of the NOx catalyst coincides with the flow direction of the exhaust gas (see the black arrow in FIG. 3). That is, each catalyst cassette is arranged so that the side surface not covered with the frame faces the flow of exhaust gas. Therefore, the catalyst reactor 12 passes through the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 whose exhaust gas is disposed in the first attachment frame 13 c, and then the second attachment.
  • the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 arranged in the frame 13d are passed through and discharged from the housing 13. Note that the number of catalyst cassettes arranged inside the housing 13 is not limited to this embodiment.
  • each wedge-shaped member fixes each catalyst cassette.
  • Each wedge-shaped member is a substantially rectangular member formed in a V shape in a sectional view in which the thickness gradually increases from one side to the other side.
  • Each wedge-shaped member is supported by the housing 13 via a connecting member 28 provided at the other end.
  • the connecting member 28 is a substantially rod-like member configured to be stretchable by a screw mechanism provided in the middle.
  • the connecting member 28 includes a left screw portion 28a, a trunk portion 28b, and a right screw portion 28c.
  • the left-hand thread portion 28a is a left-hand thread male screw having a mounting bracket formed at one end.
  • the mounting bracket of the left screw portion 28a is formed such that the mounting position can be adjusted.
  • the body portion 28b has a left-handed female screw on one side and a right-handed female screw on the other side.
  • the right-hand thread portion 28c is a right-hand male thread that has a mounting bracket formed at one end.
  • the connecting member 28 is connected to the left screw portion 28a on one side of the body portion 28b, and the right screw portion 28c is connected to the other side of the body portion 28b.
  • the connecting member 28 is configured with a screw mechanism that allows the left screw portion 28a and the right screw portion 28c to move in the axial direction by rotating the body portion 28b around the axis.
  • the mounting bracket of the left screw portion 28a is attached to the housing 13, and each wedge-shaped member is attached to the mounting bracket of the trunk right screw portion 28c.
  • the first wedge-shaped member 22 fixes the first catalyst cassette 14 and the second catalyst cassette 15.
  • the first wedge-shaped member 22 is arranged so that one side end thereof faces the first catalyst cassette 14 or the second catalyst cassette 15.
  • the first wedge-shaped member 22 is supported by the housing 13 via a connecting member 28 that is arranged so that its axial direction is parallel to the exhaust flow direction (see the black arrow in FIG. 4B).
  • the first wedge-shaped member 22 can be supported by the housing 13 so as to face the gap G between the frame of the first catalyst cassette 14 and the frame of the second catalyst cassette 15 and to follow the gap G. Composed.
  • the first wedge-shaped member 22 is configured to be movable in parallel with the exhaust flow direction by operating the screw mechanism of the connecting member 28 (see the white arrow in FIG. 4B).
  • the second wedge-shaped member 23, the third wedge-shaped member 24, and the fourth wedge-shaped member 25 are supported by the housing 13 via the connecting member 28.
  • the second wedge-shaped member 23 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the third catalyst cassette 16 and the frame body of the fourth catalyst cassette 17.
  • the third wedge-shaped member 24 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the fifth catalyst cassette 18 and the frame body of the sixth catalyst cassette 19.
  • the fourth wedge-shaped member 25 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the seventh catalyst cassette 20 and the frame body of the eighth catalyst cassette 21.
  • the first lid member 26 and the second lid member 27 close the first opening 13a and the second opening 13b of the housing 13.
  • the first lid member 26 is configured to be able to close the first opening 13a
  • the second lid member 27 is configured to be able to close the second opening 13b.
  • the 1st cover member 26 and the 2nd cover member 27 can prevent the leakage of the exhaust_gas
  • spring members 26a which are elastic members, are provided at positions facing the third catalyst cassette 16 and positions facing the fourth catalyst cassette 17, respectively.
  • the first lid member 26 is configured such that the spring member 26a biases the third catalyst cassette 16 and the fourth catalyst cassette 17 when attached to the housing 13 so as to close the first opening 13a.
  • the urging force of the spring member 26 a is applied to the first catalyst cassette 14 and the second catalyst cassette 15 via the third catalyst cassette 16 and the fourth catalyst cassette 17. That is, the first lid member 26 is configured to be able to bias the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17.
  • spring members 27a which are elastic members, are provided at positions facing the seventh catalyst cassette 20 and positions facing the eighth catalyst cassette 21. At this time, the urging force of the spring member 27 a is applied to the fifth catalyst cassette 18 and the sixth catalyst cassette 19 via the seventh catalyst cassette 20 and the eighth catalyst cassette 21. That is, the second lid member 27 is configured to be able to bias the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21.
  • the elastic member is not limited to the spring members 26a and 27a.
  • each catalyst cassette is fixed in the exhaust purification device 1 that is the first embodiment of the exhaust purification device according to the present invention.
  • the first catalyst cassette 14 and the second catalyst cassette 15 are inserted into the housing 13 from the first opening 13 a of the catalyst reactor 12.
  • the first catalyst cassette 14 and the second catalyst cassette 15 are supported by the first mounting frame 13 c of the housing 13.
  • the third catalyst cassette 16 and the fourth catalyst cassette 17 are inserted into the housing 13 from the first opening 13 a of the catalyst reactor 12.
  • the third catalyst cassette 16 and the fourth catalyst cassette 17 are supported by the first mounting frame 13 c of the housing 13 so as to be adjacent to the first catalyst cassette 14 and the second catalyst cassette 15.
  • the screw mechanism of the connecting member 28 that supports the first wedge-shaped member 22 is operated, and the connecting member 28 is extended.
  • the first wedge-shaped member 22 is inserted into the gap G between the frame body of the first catalyst cassette 14 and the frame body of the second catalyst cassette 15.
  • the first catalyst cassette 14 and the second catalyst cassette 15 are biased in the insertion direction (hereinafter simply referred to as “X direction”) by the first wedge-shaped member 22.
  • X direction the first catalyst cassette 14 and the second catalyst cassette 15 are sandwiched between the first mounting frame 13 c and the first wedge-shaped member 22.
  • first catalyst cassette 14 and the second catalyst cassette 15 are biased by the first wedge-shaped member 22 in the direction of widening the gap G based on the principle of the wedge.
  • first catalyst cassette 14 and the second catalyst cassette 15 are guided by the first mounting frame 13c and urged in a direction perpendicular to the X direction (hereinafter simply referred to as “Y direction”).
  • Y direction a direction perpendicular to the X direction
  • the first catalyst cassette 14 and the second catalyst cassette 15 are sandwiched between the side surface of the housing 13 and the first wedge-shaped member 22.
  • the movements of the first catalyst cassette 14 and the second catalyst cassette 15 in the X direction and the Y direction are restricted by the first wedge-shaped member 22.
  • the second wedge-shaped member 23 is inserted into the gap G between the frame body of the third catalyst cassette 16 and the frame body of the fourth catalyst cassette 17.
  • the third catalyst cassette 16 and the fourth catalyst cassette 17 are sandwiched between the first mounting frame 13 c and the second wedge-shaped member 23, and between the side surface of the housing 13 and the second wedge-shaped member 23. .
  • the movements of the third catalyst cassette 16 and the fourth catalyst cassette 17 in the X direction and the Y direction are restricted by the second wedge-shaped member 23.
  • the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are inserted into the housing 13 from the second opening 13b of the catalyst reactor 12.
  • the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are supported by the second mounting frame 13 d of the housing 13.
  • the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are inserted into the housing 13 through the second opening 13 b of the catalyst reactor 12.
  • the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are supported by the second mounting frame 13 d of the housing 13 so as to be adjacent to the fifth catalyst cassette 18 and the sixth catalyst cassette 19.
  • the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are provided between the second mounting frame 13d and the third wedge-shaped member 24, the side surface of the housing 13 and the third side. It is sandwiched between the wedge-shaped member 24.
  • the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are sandwiched between the second mounting frame 13d and the fourth wedge-shaped member 25 and between the side surface of the housing 13 and the fourth wedge-shaped member 25. . That is, the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are in the X and Y directions by the third wedge member 24, and the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are in the X and Y directions by the fourth wedge member 25. Movement is regulated.
  • the first lid member 26 is attached so as to close the first opening 13 a of the housing 13.
  • the third catalyst cassette 16 and the fourth catalyst cassette 17 in the vicinity of the first opening 13 a are urged by the spring member 26 a of the first lid member 26.
  • the first catalyst cassette 14 and the second catalyst cassette 15 are urged by the spring member 26 a via the adjacent third catalyst cassette 16 and fourth catalyst cassette 17. That is, the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 are moved by the first lid member 26 in a direction perpendicular to the X direction and the Y direction (hereinafter simply referred to as “Z direction”). ”) Is regulated.
  • the 2nd cover member 27 is attached so that the 2nd opening part 13b of the housing
  • the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are urged by the spring member 27 a of the second lid member 27, respectively. That is, the movement of the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 in the Z direction is restricted by the second lid member 27.
  • the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 are restricted from moving in the X direction, the Y direction, and the Z direction.
  • the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are restricted from moving in the X, Y, and Z directions. That is, each catalyst cassette is fixed integrally with the catalyst reactor 12.
  • a first opening that is an opening in the catalyst reactor 12 is provided in the exhaust gas purification apparatus 1 including the catalyst reactor 12 in which the six catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are detachably mounted.
  • a first wedge-shaped member 22 and a second wedge-shaped member 23 that are wedge-shaped members are formed in a gap G between the catalyst cassette and the catalyst cassette of each catalyst cassette inserted adjacent to each other from the opening 13a and the second opening 13b.
  • the first wedge member 26 and the second lid portion which are lid members for inserting the third wedge member 24 and the fourth wedge member 25 and closing the first opening 13a and the second opening 13b.
  • Each catalyst cassette was charged by 27 is intended to be energized.
  • the movement in the X direction and the Y direction is regulated by each wedge-shaped member, and the movement in the Z direction is regulated by the first lid member 26 and the second lid member 27.
  • Each wedge-shaped member is supported by the catalyst reactor 12 so as to be movable in the insertion direction of each wedge-shaped member.
  • each catalyst cassette is integrally fixed with the catalyst reactor 12 via each wedge-shaped member.
  • Each wedge-shaped member is supported by the catalyst reactor 12 via a connecting member 28 that is configured to be extendable and contractable by a left screw portion 28a, a barrel portion 28b, and a right screw portion 28c, which are screw mechanisms.
  • a connecting member 28 that is configured to be extendable and contractable by a left screw portion 28a, a barrel portion 28b, and a right screw portion 28c, which are screw mechanisms.
  • the first lid member 26 and the second lid member 27 are provided with spring members 26a and 27a, which are elastic members that urge the respective catalyst cassettes. With this configuration, the urging force by the first lid member 26 and the second lid member 27 is maintained even if each catalyst cassette or the catalyst reactor 12 is thermally expanded. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of the cassette due to thermal expansion or vibration can be suppressed.
  • each wedge-shaped member is supported by the housing 13 via a connecting member 29.
  • the connecting member 29 is a substantially rod-like member that is configured to be stretchable by a screw mechanism and a spring mechanism in the middle.
  • the connecting member 29 includes a left screw portion 29a, a body portion 29b, a right screw portion 29c, a slide shaft 29d, and a spring 29e.
  • the right-hand thread portion 29c is a hollow-cylindrical right-hand male screw having a mounting bracket formed at one end.
  • the connecting member 29 is connected to the left screw portion 29a on one side of the trunk portion 29b, and the right screw portion 28c is connected to the other side of the trunk portion 29b.
  • the connecting member 29 is configured with a screw mechanism.
  • the slide shaft 29d is made of a rod-shaped member having a mounting bracket formed at one end.
  • the slide shaft 29d is slidably inserted into the hollow portion of the right screw portion 29c via a spring 29e formed of a compression spring without any gap.
  • the connecting member 29 is configured with a spring mechanism in which the slide shaft 29d slides in the axial direction by a predetermined urging force.
  • Each wedge-shaped member is attached to the mounting bracket of the slide shaft 29d.
  • each wedge-shaped member is configured such that it can be inserted into the gap G between the frame body of each catalyst cassette by extending the entire length of the connection member 29 by a screw mechanism.
  • Each catalyst cassette is configured to be biased with a constant force by bending a spring 29e of a spring mechanism of the member 29.
  • the screw mechanism of the connecting member 29 that supports the first wedge-shaped member 22 is operated, and the connecting member 29 is extended.
  • the first wedge-shaped member 22 is inserted into the gap G between the frame body of the first catalyst cassette 14 and the frame body of the second catalyst cassette 15.
  • the spring 29e of the spring mechanism of the connecting member 29 bends in accordance with the extension amount due to the operation of the screw mechanism.
  • the 1st wedge-shaped member 22 urges
  • the third catalyst cassette 16 and the fourth catalyst cassette 17 are provided by the second wedge-shaped member 23, and the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are provided by the third wedge-shaped member 24, thereby providing the seventh catalyst cassette 20.
  • the eighth catalyst cassette 21 are restricted in movement in the X direction and the Y direction by the fourth wedge-shaped member 25.
  • each wedge-shaped member is urged in the insertion direction of each wedge-shaped member by the spring 29e of the spring mechanism.
  • the urging force of each wedge-shaped member is maintained even if each catalyst cassette or catalyst reactor 12 is thermally expanded. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
  • each wedge-shaped member or each spring member may be fixed by either one of them.
  • the movement of each catalyst cassette in the X direction and the Y direction may be regulated by each wedge-shaped member, and the movement in the Z direction may be fixed by the frictional force between each catalyst cassette and the catalyst reactor 12. .
  • the present invention can be used in the technology of an exhaust gas purification device for an internal combustion engine.

Abstract

The purpose of the present invention is to provide an exhaust gas purification device whereby movement of or damage to a catalyst cassette due to thermal expansion, vibration, etc., can be suppressed. An exhaust gas purification device (1) provided with a catalyst reactor (12) inside which a plurality of catalyst cassettes accommodating a NOx catalyst as a catalyst are detachably mounted, wherein a wedge-shaped member is interposed in a gap (G) between catalyst cassettes inserted so as to be adjacent to each other from a first opening (13a) and a second opening (13b) which are openings into the catalyst reactor (12), and the inserted catalyst cassettes are urged by a first lid member (26) and a second lid member (27) which are lid members for blocking the first opening (13a) and second opening (13b).

Description

排気浄化装置Exhaust purification device
　本発明は、内燃機関の排気浄化装置に関する。 The present invention relates to an exhaust purification device for an internal combustion engine.
　従来、内燃機関からの排気に含まれるＮＯｘ（窒素酸化物）を低減させるために、選択還元型のＮＯｘ触媒（ＳＣＲ触媒）を配置した触媒反応器と還元剤であるアンモニアとを用いて、ＮＯｘを窒素と水とに還元する排気浄化装置が知られている。高温の排気中に噴射した尿素水からアンモニアを生成し、ＮＯｘ触媒と接触させることでＮＯｘを窒素と水に還元するものである。 Conventionally, in order to reduce NOx (nitrogen oxides) contained in exhaust gas from an internal combustion engine, NOx is used by using a catalytic reactor in which a selective reduction type NOx catalyst (SCR catalyst) is arranged and ammonia as a reducing agent. Exhaust gas purification devices that reduce nitrogen to water and nitrogen are known. Ammonia is generated from urea water injected into the high-temperature exhaust gas, and NOx is reduced to nitrogen and water by contacting with the NOx catalyst.
　このような排気浄化装置において、触媒反応器のＮＯｘ触媒には、Ｔｉ等の酸化物の担体にＶやＣｒ等の活性成分を含んだ材料を略直方体のハニカム構造に形成して金属の溶接構造の枠体からなるカセットに組み込んだもの（以下、単に触媒カセット）が用いられる。この触媒カセットを触媒反応器に複数配置して、押ねじ等によって着脱可能に触媒反応器に固定したものがある。例えば、特許文献１に記載の如くである。 In such an exhaust purification apparatus, the NOx catalyst of the catalytic reactor is formed of a metal welded structure in which a material containing an active component such as V or Cr in an oxide carrier such as Ti is formed in a substantially rectangular parallelepiped honeycomb structure. (Hereinafter simply referred to as a catalyst cassette) is used. Some of the catalyst cassettes are arranged in the catalyst reactor and fixed to the catalyst reactor so as to be detachable by a push screw or the like. For example, as described in Patent Document 1.
　特許文献１に記載のような排気浄化装置は、溶接構造の触媒カセットの製作誤差を吸収するために耐熱性、柔軟性に優れたグラスファイバー等を介して触媒反応器に固定される。しかし、グラスファイバー等の経時劣化等により触媒反応器と触媒カセットとの固定力が低下し、触媒カセットが触媒反応器内で移動したり破損したりする可能性があった。 An exhaust gas purification apparatus as described in Patent Document 1 is fixed to a catalytic reactor via a glass fiber having excellent heat resistance and flexibility in order to absorb manufacturing errors of a catalyst cassette having a welded structure. However, there is a possibility that the fixing force between the catalyst reactor and the catalyst cassette decreases due to deterioration with time of glass fiber or the like, and the catalyst cassette moves or breaks in the catalyst reactor.
特開平７－２７５６６０号公報JP-A-7-275660
　本発明は、このような問題を解決すべくなされたものであり、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等による触媒カセットの移動や破損を抑制することができる排気浄化装置の提供を目的とする。 The present invention has been made to solve such problems, and suppresses movement and breakage of the catalyst cassette due to thermal expansion, vibration, etc., even if gaps due to manufacturing errors of the catalyst cassette or catalyst reactor vary. An object of the present invention is to provide an exhaust emission control device that can perform such a process.
　本発明の解決しようとする課題は以上の如くであり、次にこの課題を解決するための手段を説明する。 The problems to be solved by the present invention are as described above. Next, means for solving the problems will be described.
　すなわち、本発明においては、触媒が収容された複数の触媒カセットを内部に着脱自在に装着可能な触媒反応器を備える排気浄化装置において、触媒反応器の内部に開口部から隣り合うようにして装入された触媒カセットと触媒カセットとの隙間にくさび状部材が挿入され、開口部を閉塞する蓋部材によって装入された触媒カセットが付勢されるものである。 That is, in the present invention, in an exhaust gas purification apparatus including a catalyst reactor in which a plurality of catalyst cassettes in which a catalyst is accommodated can be detachably mounted, the catalyst reactor is mounted adjacent to the opening. A wedge-shaped member is inserted into the gap between the catalyst cassettes inserted, and the catalyst cassette inserted is energized by a lid member that closes the opening.
　本発明においては、前記くさび状部材が、くさび状部材の挿入方向に移動自在に前記触媒反応器に支持されるものである。 In the present invention, the wedge-shaped member is supported by the catalytic reactor so as to be movable in the insertion direction of the wedge-shaped member.
　本発明においては、前記くさび状部材が、ねじ機構によって伸縮自在に構成される連結部材を介して前記触媒反応器に支持されるものである。 In the present invention, the wedge-shaped member is supported by the catalytic reactor via a connecting member configured to be extendable and contractable by a screw mechanism.
　本発明においては、前記くさび状部材が、ばね機構によってくさび状部材の挿入方向に付勢されるものである。 In the present invention, the wedge-shaped member is biased in the insertion direction of the wedge-shaped member by a spring mechanism.
　本発明においては、前記蓋部材には、前記触媒カセットを付勢する弾性部材が備えられるものである。 In the present invention, the lid member is provided with an elastic member for biasing the catalyst cassette.
　本発明の効果として、以下に示すような効果を奏する。 As the effects of the present invention, the following effects are obtained.
　本発明によれば、くさび状部材によってくさび状部材の挿入方向および挿入方向に垂直な方向の動きが規制され、蓋部材によって前記両方向に垂直な方向の動きが規制される。これにより、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 According to the present invention, the wedge-shaped member restricts the insertion direction of the wedge-shaped member and the movement in the direction perpendicular to the insertion direction, and the lid member restricts the movement in the direction perpendicular to both the directions. Thereby, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　本発明によれば、各触媒カセットがくさび状部材を介して触媒反応器と一体的に固定される。これにより、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 According to the present invention, each catalyst cassette is fixed integrally with the catalyst reactor via the wedge-shaped member. Thereby, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　本発明によれば、ねじ機構によってくさび状部材のくさび効果が増大されて各触媒カセットが強固に固定される。これにより、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 According to the present invention, the wedge effect of the wedge-shaped member is increased by the screw mechanism, and each catalyst cassette is firmly fixed. Thereby, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　本発明によれば、各触媒カセットや触媒反応器が熱膨張してもくさび状部材による付勢力が維持される。これにより、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 According to the present invention, the urging force by the wedge-shaped member is maintained even if each catalyst cassette or catalyst reactor is thermally expanded. Thereby, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　本発明によれば、各触媒カセットや触媒反応器が熱膨張しても蓋部材による付勢力が維持される。これにより、触媒カセットや触媒反応器の製作誤差による隙間にばらつきが生じても熱膨張や振動等によるカセットの移動や破損を抑制することができる。 According to the present invention, the urging force by the lid member is maintained even if each catalyst cassette or catalyst reactor is thermally expanded. Thereby, even if the gap due to the manufacturing error of the catalyst cassette or the catalyst reactor varies, the movement or breakage of the cassette due to thermal expansion or vibration can be suppressed.
本発明に係る排気浄化装置の全体構成を示す概略図。Schematic which shows the whole structure of the exhaust gas purification apparatus which concerns on this invention. （ａ）本発明に係る排気浄化装置の第一実施形態における触媒反応器の正面図（ｂ）本発明に係る排気浄化装置の第一実施形態における触媒反応器の側面図。(A) Front view of the catalytic reactor in the first embodiment of the exhaust purification apparatus according to the present invention (b) Side view of the catalytic reactor in the first embodiment of the exhaust purification apparatus according to the present invention. 本発明に係る排気浄化装置の第一実施形態における触媒反応器の斜視図。The perspective view of the catalyst reactor in 1st embodiment of the exhaust gas purification apparatus which concerns on this invention. （ａ）本発明に係る排気浄化装置の第一実施形態におけるくさび状部材を示す図（ｂ）本発明に係る排気浄化装置の第一実施形態におけるくさび状部材の使用態様を示す図。(A) The figure which shows the wedge-shaped member in 1st embodiment of the exhaust gas purification apparatus which concerns on this invention (b) The figure which shows the usage condition of the wedge-shaped member in 1st embodiment of the exhaust gas purification apparatus which concerns on this invention. （ａ）本発明に係る排気浄化装置の第一実施形態および第二実施形態における蓋部材を示す図（ｂ）本発明に係る排気浄化装置の第一実施形態および第二実施形態における蓋部材の使用態様を示す図。(A) The figure which shows the cover member in 1st embodiment and 2nd embodiment of the exhaust gas purification apparatus which concerns on this invention (b) The cover member in 1st embodiment and 2nd embodiment of the exhaust gas purification apparatus which concerns on this invention The figure which shows a use aspect. （ａ）本発明に係る排気浄化装置の第一実施形態における触媒カセットの固定の態様を示す正面図（ｂ）本発明に係る排気浄化装置の第一実施形態における触媒カセットの固定の態様を示す側面図。(A) Front view showing an aspect of fixing the catalyst cassette in the first embodiment of the exhaust purification apparatus according to the present invention (b) Shown is an aspect of fixing the catalyst cassette in the first embodiment of the exhaust purification apparatus according to the present invention. Side view. （ａ）本発明に係る排気浄化装置の第二実施形態におけるくさび状部材を示す図（ｂ）本発明に係る排気浄化装置の第二実施形態におけるくさび状部材の使用態様を示す図。(A) The figure which shows the wedge-shaped member in 2nd embodiment of the exhaust gas purification apparatus which concerns on this invention (b) The figure which shows the usage condition of the wedge-shaped member in 2nd embodiment of the exhaust gas purification apparatus which concerns on this invention. （ａ）本発明に係る排気浄化装置の第二実施形態における触媒カセットの固定の態様を示す正面図（ｂ）本発明に係る排気浄化装置の第二実施形態における触媒カセットの固定の態様を示す側面図。(A) Front view showing an aspect of fixing the catalyst cassette in the second embodiment of the exhaust purification apparatus according to the present invention (b) Shown is an aspect of fixing the catalyst cassette in the second embodiment of the exhaust purification apparatus according to the present invention. Side view.
　以下に、図１および図２を用いて本発明に係る排気浄化装置の第一実施形態である排気浄化装置１について説明する。なお、本実施形態における「上流側」とは流体の流れ方向における上流側を示し、「下流側」とは流体の流れ方向における下流側を示す。 Hereinafter, an exhaust purification device 1 that is a first embodiment of the exhaust purification device according to the present invention will be described with reference to FIGS. 1 and 2. In this embodiment, “upstream side” indicates the upstream side in the fluid flow direction, and “downstream side” indicates the downstream side in the fluid flow direction.
　図１に示すように、排気浄化装置１は、発電機３３等の動力源であるエンジン３１から排出される排気を浄化するものである。排気浄化装置１は、エンジン３１に接続される排気管１１に設けられる。排気浄化装置１は、尿素水噴射ノズル２、尿素供給流路３、空気供給流路４、加圧空気弁５、エアタンク６、加圧空気供給ポンプ（コンプレッサ）７、切替弁８、尿素水供給ポンプ９、尿素水タンク１０、触媒反応器１２、制御装置３０等を具備する。 As shown in FIG. 1, the exhaust purification device 1 purifies exhaust discharged from an engine 31 that is a power source such as a generator 33. The exhaust purification device 1 is provided in an exhaust pipe 11 connected to the engine 31. The exhaust purification device 1 includes a urea water injection nozzle 2, a urea supply channel 3, an air supply channel 4, a pressurized air valve 5, an air tank 6, a pressurized air supply pump (compressor) 7, a switching valve 8, and urea water supply. A pump 9, a urea water tank 10, a catalytic reactor 12, a control device 30 and the like are provided.
　尿素水噴射ノズル２は、尿素水を排気管１１または触媒反応器１２の内部に供給するものである。尿素水噴射ノズル２は、管状部材から構成され、その一側（下流側）を排気管１１または触媒反応器１２の外部から内部へ挿通するようにして設けられる。尿素水噴射ノズル２には、尿素水の流路である尿素供給流路３が接続される。また、尿素水噴射ノズル２には、加圧空気の流路である空気供給流路４が接続される。 The urea water injection nozzle 2 supplies urea water into the exhaust pipe 11 or the catalytic reactor 12. The urea water injection nozzle 2 is formed of a tubular member, and is provided so that one side (downstream side) thereof is inserted from the outside of the exhaust pipe 11 or the catalytic reactor 12 into the inside. A urea supply flow path 3 that is a flow path of urea water is connected to the urea water injection nozzle 2. The urea water injection nozzle 2 is connected to an air supply flow path 4 that is a flow path of pressurized air.
　加圧空気弁５は、加圧空気の流路を連通または遮断する。加圧空気弁５は、空気供給流路４に設けられる。加圧空気弁５は、電磁弁で構成されソレノイドが制御装置３０と接続される。加圧空気弁５は、図示しないスプールを摺動させることにより尿素水噴射ノズル２に加圧空気供給ポンプ（コンプレッサ）７によってエアタンク６に加圧された加圧空気を供給可能に構成される。 The pressurized air valve 5 communicates or blocks the flow path of the pressurized air. The pressurized air valve 5 is provided in the air supply flow path 4. The pressurized air valve 5 is composed of an electromagnetic valve, and a solenoid is connected to the control device 30. The pressurized air valve 5 is configured to be able to supply pressurized air pressurized to the air tank 6 by a pressurized air supply pump (compressor) 7 to the urea water injection nozzle 2 by sliding a spool (not shown).
　切替弁８は、尿素水の流路を切り替える。切替弁８は、空気供給流路４の尿素水供給ポンプ９の下流側に設けられる。切替弁８は、図示しないスプールを摺動させることにより尿素水噴射ノズル２に尿素水供給ポンプ９によって尿素水タンク１０の尿素水を供給可能に構成される。 The switching valve 8 switches the urea water flow path. The switching valve 8 is provided on the downstream side of the urea water supply pump 9 in the air supply flow path 4. The switching valve 8 is configured such that the urea water in the urea water tank 10 can be supplied to the urea water injection nozzle 2 by the urea water supply pump 9 by sliding a spool (not shown).
　触媒反応器１２は、内部に配置されたＮＯｘ触媒によって排気中のＮＯｘを選択還元するものである。触媒反応器１２は、エンジン３１と接続されている排気管１１の途中部であって尿素水噴射ノズル２の下流側に設けられる。触媒反応器１２は、筐体１３の内部にＮＯｘ触媒を金属の枠体に組み込んだ第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６、第４触媒カセット１７、第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１（以下、単に「各触媒カセット」と記す）が配置される。 The catalytic reactor 12 selectively reduces NOx in the exhaust gas with a NOx catalyst arranged inside. The catalytic reactor 12 is provided in the middle of the exhaust pipe 11 connected to the engine 31 and downstream of the urea water injection nozzle 2. The catalyst reactor 12 includes a first catalyst cassette 14, a second catalyst cassette 15, a third catalyst cassette 16, a fourth catalyst cassette 17, and a fifth catalyst cassette in which a NOx catalyst is incorporated in a metal frame inside a housing 13. 18, a sixth catalyst cassette 19, a seventh catalyst cassette 20, and an eighth catalyst cassette 21 (hereinafter simply referred to as “each catalyst cassette”) are arranged.
　制御装置３０は、加圧空気弁５、切替弁８、尿素水供給ポンプ９等を制御する。制御装置３０には、加圧空気弁５、切替弁８、尿素水供給ポンプ９等を制御するための種々のプログラムやデータが格納される。制御装置３０は、ＣＰＵ、ＲＯＭ、ＲＡＭ、ＨＤＤ等がバスで接続される構成であってもよく、あるいはワンチップのＬＳＩ等からなる構成であってもよい。また、制御装置３０は、エンジン３１を制御するＥＣＵ３２と一体的に構成することも可能である。 Control device 30 controls pressurized air valve 5, switching valve 8, urea water supply pump 9, and the like. The control device 30 stores various programs and data for controlling the pressurized air valve 5, the switching valve 8, the urea water supply pump 9, and the like. The control device 30 may be configured such that a CPU, a ROM, a RAM, an HDD, and the like are connected by a bus, or may be configured by a one-chip LSI or the like. The control device 30 can also be configured integrally with an ECU 32 that controls the engine 31.
　このように構成される排気浄化装置１において、制御装置３０は、加圧空気弁５、切替弁８、尿素水供給ポンプ９等を制御して、排気管１１内に尿素水を噴射する。排気の熱によって噴射された尿素水からアンモニアが生成される。排気浄化装置１は、アンモニアと触媒反応器１２の各触媒カセットに組み込まれるＮＯｘ触媒によってＮＯｘを窒素と水に還元する。 In the exhaust purification device 1 configured as described above, the control device 30 controls the pressurized air valve 5, the switching valve 8, the urea water supply pump 9, and the like to inject urea water into the exhaust pipe 11. Ammonia is generated from the urea water injected by the heat of the exhaust. The exhaust purification apparatus 1 reduces NOx to nitrogen and water by the NOx catalyst incorporated in each catalyst cassette of the ammonia and catalytic reactor 12.
　次に、図２から図５を用いて本発明に係る排気浄化装置１における触媒反応器１２について具体的に説明する。 Next, the catalytic reactor 12 in the exhaust emission control device 1 according to the present invention will be specifically described with reference to FIGS.
　図２に示すように、触媒反応器１２は、筐体１３、各触媒カセット、第１くさび状部材２２、第２くさび状部材２３、第３くさび状部材２４および第４くさび状部材２５（以下、単に「各くさび状部材」と記す）、第１蓋部材２６および第２蓋部材２７を具備する。 As shown in FIG. 2, the catalyst reactor 12 includes a housing 13, each catalyst cassette, a first wedge-shaped member 22, a second wedge-shaped member 23, a third wedge-shaped member 24, and a fourth wedge-shaped member 25 (hereinafter referred to as “the first reactor”). The first lid member 26 and the second lid member 27 are simply provided as “each wedge-shaped member”.
　筐体１３の一側端部には排気管１１が接続され、筐体１３の他側端部は排気管１１を介して外部に開放されている。つまり、筐体１３は、一側（上流側）から他側（下流側）に向かって（図２黒塗矢印参照）エンジン３１からの排気が流れる排気流路として構成されている。筐体１３の側面には、上流側から順に第１開口部１３ａと第２開口部１３ｂとが形成される。また、筐体１３は、第１開口部１３ａから挿入される触媒カセットを着脱可能に支持する第１取付フレーム１３ｃと、第２開口部１３ｂから挿入される触媒カセットを着脱可能に支持する第２取付フレーム１３ｄとが設けられる。第１開口部１３ａは、第１蓋部材２６によって閉塞可能に構成される。第２開口部１３ｂは、第２蓋部材２７によって閉塞可能に構成される。 An exhaust pipe 11 is connected to one end of the housing 13, and the other end of the housing 13 is opened to the outside through the exhaust pipe 11. That is, the housing 13 is configured as an exhaust passage through which exhaust from the engine 31 flows from one side (upstream side) to the other side (downstream side) (see the black arrow in FIG. 2). A first opening 13a and a second opening 13b are formed on the side surface of the housing 13 in order from the upstream side. The housing 13 also includes a first mounting frame 13c that removably supports the catalyst cassette inserted from the first opening 13a, and a second that removably supports the catalyst cassette inserted from the second opening 13b. A mounting frame 13d is provided. The first opening 13 a is configured to be able to be closed by the first lid member 26. The second opening 13b is configured to be closed by the second lid member 27.
　図３に示すように、ＮＯｘ触媒は、例えばアルミナ、ジルコニア、バナジア／チタニアまたはゼオライト等の金属を含有する材料を多数の格子状の貫通孔を有する略直方体に生成したものである（図３におけるＡ参照）。各触媒カセットは、ＮＯｘ触媒の貫通孔が開口している側面以外の側面を金属の枠体で覆うようにして構成される（図３におけるＢ参照）。 As shown in FIG. 3, the NOx catalyst is a material in which a metal-containing material such as alumina, zirconia, vanadia / titania or zeolite is formed into a substantially rectangular parallelepiped having a large number of lattice-shaped through holes (in FIG. 3). A). Each catalyst cassette is configured such that a side surface other than the side surface where the through hole of the NOx catalyst is open is covered with a metal frame (see B in FIG. 3).
　第１触媒カセット１４と第２触媒カセット１５とは、枠体で覆われた側面同士を隣り合わせにして第１開口部１３ａから筐体１３内の第１取付フレーム１３ｃに支持されるように装入される。さらに、第３触媒カセット１６と第４触媒カセット１７とは、枠体で覆われた側面同士を隣り合わせにして第１開口部１３ａから筐体１３内の第１取付フレーム１３ｃに支持されるように装入される。この際、第３触媒カセット１６は、第１触媒カセット１４と隣り合うように配置される。第４触媒カセット１７は、第２触媒カセット１５と隣り合うように配置される。 The first catalyst cassette 14 and the second catalyst cassette 15 are loaded so that the side surfaces covered by the frame are adjacent to each other and supported by the first mounting frame 13c in the housing 13 from the first opening 13a. Is done. Further, the third catalyst cassette 16 and the fourth catalyst cassette 17 are supported by the first mounting frame 13c in the housing 13 from the first opening 13a with the side surfaces covered with the frame bodies adjacent to each other. It is inserted. At this time, the third catalyst cassette 16 is disposed adjacent to the first catalyst cassette 14. The fourth catalyst cassette 17 is disposed adjacent to the second catalyst cassette 15.
　同様にして、第５触媒カセット１８および第６触媒カセット１９と、第７触媒カセット２０および第８触媒カセット２１とは、第２開口部１３ｂから筐体１３内の第２取付フレーム１３ｄに支持されるように装入される。この際、第７触媒カセット２０は、第５触媒カセット１８と隣り合うように配置される。第８触媒カセット２１は、第６触媒カセット１９と隣り合うように配置される。 Similarly, the fifth catalyst cassette 18 and the sixth catalyst cassette 19, and the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are supported by the second mounting frame 13d in the housing 13 from the second opening 13b. It is inserted so that. At this time, the seventh catalyst cassette 20 is disposed adjacent to the fifth catalyst cassette 18. The eighth catalyst cassette 21 is disposed adjacent to the sixth catalyst cassette 19.
　各触媒カセットは、ＮＯｘ触媒の貫通孔の軸方向が排気の流れ方向（図３黒塗矢印参照）と一致するように配置される。つまり、各触媒カセットは、枠体で覆われていない側面が排気の流れに対向するように配置される。従って、触媒反応器１２は、排気が第１取付フレーム１３ｃに配置される第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６および第４触媒カセット１７を通過した後、第２取付フレーム１３ｄに配置される第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１を通過して筐体１３から排出されるように構成される。なお、筐体１３の内部に配置される触媒カセットの数は、本実施形態に限定するものではない。 Each catalyst cassette is arranged so that the axial direction of the through hole of the NOx catalyst coincides with the flow direction of the exhaust gas (see the black arrow in FIG. 3). That is, each catalyst cassette is arranged so that the side surface not covered with the frame faces the flow of exhaust gas. Therefore, the catalyst reactor 12 passes through the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 whose exhaust gas is disposed in the first attachment frame 13 c, and then the second attachment. The fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 arranged in the frame 13d are passed through and discharged from the housing 13. Note that the number of catalyst cassettes arranged inside the housing 13 is not limited to this embodiment.
　図２および図４に示すように、各くさび状部材は、各触媒カセットを固定するものである。各くさび状部材は、その一側から他側に向かってその厚みが徐々に厚くなる断面視でＶ字状に形成される略長方形の部材である。各くさび状部材は、他側端部に設けられる連結部材２８を介して筐体１３に支持される。 As shown in FIGS. 2 and 4, each wedge-shaped member fixes each catalyst cassette. Each wedge-shaped member is a substantially rectangular member formed in a V shape in a sectional view in which the thickness gradually increases from one side to the other side. Each wedge-shaped member is supported by the housing 13 via a connecting member 28 provided at the other end.
　図４（ａ）に示すように、連結部材２８は、途中部に設けられるねじ機構によって伸縮自在に構成される略棒状の部材である。連結部材２８は、左ねじ部２８ａ、胴部２８ｂおよび右ねじ部２８ｃから構成される。 As shown in FIG. 4 (a), the connecting member 28 is a substantially rod-like member configured to be stretchable by a screw mechanism provided in the middle. The connecting member 28 includes a left screw portion 28a, a trunk portion 28b, and a right screw portion 28c.
　左ねじ部２８ａは、一方の端部に取付ブラケットが形成される左ねじの雄ねじからなる。左ねじ部２８ａの取付ブラケットは、取付位置が調整可能に形成される。胴部２８ｂは、一側に左ねじの雌ねじが形成され、他側に右ねじの雌ねじが形成される。右ねじ部２８ｃは、一方の端部に取付ブラケットが形成される右ねじの雄ねじからなる。連結部材２８は、胴部２８ｂの一側に左ねじ部２８ａに接続され、胴部２８ｂの他側に右ねじ部２８ｃが接続される。これにより、連結部材２８には、胴部２８ｂを軸周りに回転させることで左ねじ部２８ａと右ねじ部２８ｃとが軸方向に移動可能なねじ機構が構成される。連結部材２８は、左ねじ部２８ａの取付ブラケットが筐体１３に取り付けられ、胴右ねじ部２８ｃの取付ブラケットに各くさび状部材がそれぞれ取り付けられる。 The left-hand thread portion 28a is a left-hand thread male screw having a mounting bracket formed at one end. The mounting bracket of the left screw portion 28a is formed such that the mounting position can be adjusted. The body portion 28b has a left-handed female screw on one side and a right-handed female screw on the other side. The right-hand thread portion 28c is a right-hand male thread that has a mounting bracket formed at one end. The connecting member 28 is connected to the left screw portion 28a on one side of the body portion 28b, and the right screw portion 28c is connected to the other side of the body portion 28b. Thereby, the connecting member 28 is configured with a screw mechanism that allows the left screw portion 28a and the right screw portion 28c to move in the axial direction by rotating the body portion 28b around the axis. In the connecting member 28, the mounting bracket of the left screw portion 28a is attached to the housing 13, and each wedge-shaped member is attached to the mounting bracket of the trunk right screw portion 28c.
　図４（ｂ）に示すように、第１くさび状部材２２は、第１触媒カセット１４と第２触媒カセット１５とを固定するものである。第１くさび状部材２２は、その一側端部が第１触媒カセット１４または第２触媒カセット１５に対向するように配置される。第１くさび状部材２２は、軸方向が排気の流れ方向（図４（ｂ）黒塗矢印参照）と平行になるように配置される連結部材２８を介して筐体１３に支持される。これにより、第１くさび状部材２２は、第１触媒カセット１４の枠体と第２触媒カセット１５の枠体との隙間Ｇに対向し、かつ隙間Ｇに沿うように筐体１３に支持可能に構成される。また、第１くさび状部材２２は、連結部材２８のねじ機構を操作することで排気の流れ方向と平行に移動可能に構成される（図４（ｂ）白塗矢印参照）。 As shown in FIG. 4B, the first wedge-shaped member 22 fixes the first catalyst cassette 14 and the second catalyst cassette 15. The first wedge-shaped member 22 is arranged so that one side end thereof faces the first catalyst cassette 14 or the second catalyst cassette 15. The first wedge-shaped member 22 is supported by the housing 13 via a connecting member 28 that is arranged so that its axial direction is parallel to the exhaust flow direction (see the black arrow in FIG. 4B). As a result, the first wedge-shaped member 22 can be supported by the housing 13 so as to face the gap G between the frame of the first catalyst cassette 14 and the frame of the second catalyst cassette 15 and to follow the gap G. Composed. Further, the first wedge-shaped member 22 is configured to be movable in parallel with the exhaust flow direction by operating the screw mechanism of the connecting member 28 (see the white arrow in FIG. 4B).
　同様にして、第２くさび状部材２３、第３くさび状部材２４および第４くさび状部材２５は、連結部材２８を介して筐体１３に支持される。第２くさび状部材２３は、その一側端部が第３触媒カセット１６の枠体と第４触媒カセット１７の枠体との隙間Ｇに挿入可能に構成される。第３くさび状部材２４は、その一側端部が第５触媒カセット１８の枠体と第６触媒カセット１９の枠体との隙間Ｇに挿入可能に構成される。第４くさび状部材２５は、その一側端部が第７触媒カセット２０の枠体と第８触媒カセット２１の枠体との隙間Ｇに挿入可能に構成される。 Similarly, the second wedge-shaped member 23, the third wedge-shaped member 24, and the fourth wedge-shaped member 25 are supported by the housing 13 via the connecting member 28. The second wedge-shaped member 23 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the third catalyst cassette 16 and the frame body of the fourth catalyst cassette 17. The third wedge-shaped member 24 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the fifth catalyst cassette 18 and the frame body of the sixth catalyst cassette 19. The fourth wedge-shaped member 25 is configured such that one end portion thereof can be inserted into a gap G between the frame body of the seventh catalyst cassette 20 and the frame body of the eighth catalyst cassette 21.
　図２および図５に示すように、第１蓋部材２６および第２蓋部材２７は、筐体１３の第１開口部１３ａおよび第２開口部１３ｂを閉塞するものである。第１蓋部材２６は第１開口部１３ａを閉塞可能に構成され、第２蓋部材２７は第２開口部１３ｂを閉塞可能に構成される。これにより、第１蓋部材２６および第２蓋部材２７は、筐体１３からの排気の漏れを防止し、排気を各触媒カセットに案内することができる。 2 and 5, the first lid member 26 and the second lid member 27 close the first opening 13a and the second opening 13b of the housing 13. The first lid member 26 is configured to be able to close the first opening 13a, and the second lid member 27 is configured to be able to close the second opening 13b. Thereby, the 1st cover member 26 and the 2nd cover member 27 can prevent the leakage of the exhaust_gas | exhaustion from the housing | casing 13, and can guide exhaust_gas | exhaustion to each catalyst cassette.
　第１蓋部材２６の側面には、第３触媒カセット１６に対向する位置と第４触媒カセット１７に対向する位置とに弾性部材であるばね部材２６ａがそれぞれ設けられる。第１蓋部材２６は、筐体１３に第１開口部１３ａを閉塞するように取り付けられた場合、ばね部材２６ａが第３触媒カセット１６と第４触媒カセット１７とを付勢するように構成される。この際、ばね部材２６ａの付勢力は、第３触媒カセット１６および第４触媒カセット１７を介して第１触媒カセット１４と第２触媒カセット１５とに加わる。つまり、第１蓋部材２６は、第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６および第４触媒カセット１７を付勢可能に構成される。 On the side surface of the first lid member 26, spring members 26a, which are elastic members, are provided at positions facing the third catalyst cassette 16 and positions facing the fourth catalyst cassette 17, respectively. The first lid member 26 is configured such that the spring member 26a biases the third catalyst cassette 16 and the fourth catalyst cassette 17 when attached to the housing 13 so as to close the first opening 13a. The At this time, the urging force of the spring member 26 a is applied to the first catalyst cassette 14 and the second catalyst cassette 15 via the third catalyst cassette 16 and the fourth catalyst cassette 17. That is, the first lid member 26 is configured to be able to bias the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17.
　同様に、第２蓋部材２７の側面には、第７触媒カセット２０に対向する位置と第８触媒カセット２１に対向する位置とに弾性部材であるばね部材２７ａが設けられる。この際、ばね部材２７ａの付勢力は、第７触媒カセット２０および第８触媒カセット２１を介して第５触媒カセット１８と第６触媒カセット１９とに加わる。つまり、第２蓋部材２７は、第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１を付勢可能に構成される。なお、本実施形態において、弾性部材は、ばね部材２６ａ、２７ａに限定するものではない。 Similarly, on the side surface of the second lid member 27, spring members 27a, which are elastic members, are provided at positions facing the seventh catalyst cassette 20 and positions facing the eighth catalyst cassette 21. At this time, the urging force of the spring member 27 a is applied to the fifth catalyst cassette 18 and the sixth catalyst cassette 19 via the seventh catalyst cassette 20 and the eighth catalyst cassette 21. That is, the second lid member 27 is configured to be able to bias the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21. In the present embodiment, the elastic member is not limited to the spring members 26a and 27a.
　以下では、図２、図３および図６を用いて、本発明に係る排気浄化装置の第一実施形態である排気浄化装置１における各触媒カセットの固定の態様について説明する。 Hereinafter, with reference to FIGS. 2, 3, and 6, a description will be given of how each catalyst cassette is fixed in the exhaust purification device 1 that is the first embodiment of the exhaust purification device according to the present invention.
　図２および図３に示すように、第１触媒カセット１４と第２触媒カセット１５とは、触媒反応器１２の第１開口部１３ａから筐体１３の内部に装入される。第１触媒カセット１４と第２触媒カセット１５とは、筐体１３の第１取付フレーム１３ｃに支持される。第３触媒カセット１６と第４触媒カセット１７とは、触媒反応器１２の第１開口部１３ａから筐体１３の内部に装入される。第３触媒カセット１６と第４触媒カセット１７とは、第１触媒カセット１４および第２触媒カセット１５と隣接するようにして筐体１３の第１取付フレーム１３ｃに支持される。 2 and 3, the first catalyst cassette 14 and the second catalyst cassette 15 are inserted into the housing 13 from the first opening 13 a of the catalyst reactor 12. The first catalyst cassette 14 and the second catalyst cassette 15 are supported by the first mounting frame 13 c of the housing 13. The third catalyst cassette 16 and the fourth catalyst cassette 17 are inserted into the housing 13 from the first opening 13 a of the catalyst reactor 12. The third catalyst cassette 16 and the fourth catalyst cassette 17 are supported by the first mounting frame 13 c of the housing 13 so as to be adjacent to the first catalyst cassette 14 and the second catalyst cassette 15.
　図６（ａ）に示す通り、第１くさび状部材２２を支持する連結部材２８のねじ機構が操作され、連結部材２８が伸長される。第１くさび状部材２２は、第１触媒カセット１４の枠体と第２触媒カセット１５の枠体との隙間Ｇに挿入される。第１触媒カセット１４と第２触媒カセット１５とは、第１くさび状部材２２によって挿入方向（以下、単に「Ｘ方向」と記す）に付勢される。これにより、第１触媒カセット１４と第２触媒カセット１５とは、第１取付フレーム１３ｃと第１くさび状部材２２との間で挟持される。 As shown in FIG. 6A, the screw mechanism of the connecting member 28 that supports the first wedge-shaped member 22 is operated, and the connecting member 28 is extended. The first wedge-shaped member 22 is inserted into the gap G between the frame body of the first catalyst cassette 14 and the frame body of the second catalyst cassette 15. The first catalyst cassette 14 and the second catalyst cassette 15 are biased in the insertion direction (hereinafter simply referred to as “X direction”) by the first wedge-shaped member 22. Thereby, the first catalyst cassette 14 and the second catalyst cassette 15 are sandwiched between the first mounting frame 13 c and the first wedge-shaped member 22.
　さらに、第１触媒カセット１４と第２触媒カセット１５とは、第１くさび状部材２２によってくさびの原理に基づきその隙間Ｇを広げる方向に付勢される。この際、第１触媒カセット１４と第２触媒カセット１５とは、第１取付フレーム１３ｃに案内されてＸ方向に垂直な方向（以下、単に「Ｙ方向」と記す）に付勢される。これにより、第１触媒カセット１４と第２触媒カセット１５とは、筐体１３の側面と第１くさび状部材２２との間で挟持される。以上より、第１触媒カセット１４と第２触媒カセット１５とは、第１くさび状部材２２によってＸ方向およびＹ方向の動きが規制される。 Furthermore, the first catalyst cassette 14 and the second catalyst cassette 15 are biased by the first wedge-shaped member 22 in the direction of widening the gap G based on the principle of the wedge. At this time, the first catalyst cassette 14 and the second catalyst cassette 15 are guided by the first mounting frame 13c and urged in a direction perpendicular to the X direction (hereinafter simply referred to as “Y direction”). Thus, the first catalyst cassette 14 and the second catalyst cassette 15 are sandwiched between the side surface of the housing 13 and the first wedge-shaped member 22. As described above, the movements of the first catalyst cassette 14 and the second catalyst cassette 15 in the X direction and the Y direction are restricted by the first wedge-shaped member 22.
　同様に、第３触媒カセット１６と第４触媒カセット１７とは、第２くさび状部材２３が第３触媒カセット１６の枠体と第４触媒カセット１７の枠体との隙間Ｇに挿入される。第３触媒カセット１６と第４触媒カセット１７とは、第１取付フレーム１３ｃと第２くさび状部材２３との間、および筐体１３の側面と第２くさび状部材２３との間で挟持される。以上より、第３触媒カセット１６と第４触媒カセット１７とは、第２くさび状部材２３によってＸ方向およびＹ方向の動きが規制される。 Similarly, in the third catalyst cassette 16 and the fourth catalyst cassette 17, the second wedge-shaped member 23 is inserted into the gap G between the frame body of the third catalyst cassette 16 and the frame body of the fourth catalyst cassette 17. The third catalyst cassette 16 and the fourth catalyst cassette 17 are sandwiched between the first mounting frame 13 c and the second wedge-shaped member 23, and between the side surface of the housing 13 and the second wedge-shaped member 23. . As described above, the movements of the third catalyst cassette 16 and the fourth catalyst cassette 17 in the X direction and the Y direction are restricted by the second wedge-shaped member 23.
　図２および図３に示すように、第５触媒カセット１８と第６触媒カセット１９とは、触媒反応器１２の第２開口部１３ｂから筐体１３の内部に装入される。第５触媒カセット１８と第６触媒カセット１９とは、筐体１３の第２取付フレーム１３ｄに支持される。第７触媒カセット２０と第８触媒カセット２１とは、触媒反応器１２の第２開口部１３ｂから筐体１３の内部に装入される。第７触媒カセット２０と第８触媒カセット２１とは、第５触媒カセット１８および第６触媒カセット１９と隣接するようにして筐体１３の第２取付フレーム１３ｄに支持される。 2 and 3, the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are inserted into the housing 13 from the second opening 13b of the catalyst reactor 12. The fifth catalyst cassette 18 and the sixth catalyst cassette 19 are supported by the second mounting frame 13 d of the housing 13. The seventh catalyst cassette 20 and the eighth catalyst cassette 21 are inserted into the housing 13 through the second opening 13 b of the catalyst reactor 12. The seventh catalyst cassette 20 and the eighth catalyst cassette 21 are supported by the second mounting frame 13 d of the housing 13 so as to be adjacent to the fifth catalyst cassette 18 and the sixth catalyst cassette 19.
　そして、図６（ａ）に示す通り、第５触媒カセット１８と第６触媒カセット１９とは、第２取付フレーム１３ｄと第３くさび状部材２４との間、および筐体１３の側面と第３くさび状部材２４との間で挟持される。第７触媒カセット２０と第８触媒カセット２１とは、第２取付フレーム１３ｄと第４くさび状部材２５との間、および筐体１３の側面と第４くさび状部材２５との間で挟持される。つまり、第５触媒カセット１８と第６触媒カセット１９とは第３くさび状部材２４によって、第７触媒カセット２０と第８触媒カセット２１とは第４くさび状部材２５によって、Ｘ方向およびＹ方向の動きが規制される。 As shown in FIG. 6A, the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are provided between the second mounting frame 13d and the third wedge-shaped member 24, the side surface of the housing 13 and the third side. It is sandwiched between the wedge-shaped member 24. The seventh catalyst cassette 20 and the eighth catalyst cassette 21 are sandwiched between the second mounting frame 13d and the fourth wedge-shaped member 25 and between the side surface of the housing 13 and the fourth wedge-shaped member 25. . That is, the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are in the X and Y directions by the third wedge member 24, and the seventh catalyst cassette 20 and the eighth catalyst cassette 21 are in the X and Y directions by the fourth wedge member 25. Movement is regulated.
　次に、図６（ｂ）に示すように、筐体１３の第１開口部１３ａを閉塞するように第１蓋部材２６が取り付けられる。第１開口部１３ａ近傍の第３触媒カセット１６と第４触媒カセット１７とは、第１蓋部材２６のばね部材２６ａによって付勢される。第１触媒カセット１４と第２触媒カセット１５とは、隣接する第３触媒カセット１６と第４触媒カセット１７とを介してばね部材２６ａによって付勢される。つまり、第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６および第４触媒カセット１７は、第１蓋部材２６によってＸ方向とＹ方向とに垂直な方向（以下、単に「Ｚ方向」と記す）の動きが規制される。 Next, as shown in FIG. 6 (b), the first lid member 26 is attached so as to close the first opening 13 a of the housing 13. The third catalyst cassette 16 and the fourth catalyst cassette 17 in the vicinity of the first opening 13 a are urged by the spring member 26 a of the first lid member 26. The first catalyst cassette 14 and the second catalyst cassette 15 are urged by the spring member 26 a via the adjacent third catalyst cassette 16 and fourth catalyst cassette 17. That is, the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 are moved by the first lid member 26 in a direction perpendicular to the X direction and the Y direction (hereinafter simply referred to as “Z direction”). ") Is regulated.
　同様に、筐体１３の第２開口部１３ｂを閉塞するように第２蓋部材２７が取り付けられる。第５触媒カセット１８および第６触媒カセット１９と第７触媒カセット２０および第８触媒カセット２１とは、第２蓋部材２７のばね部材２７ａによってそれぞれ付勢される。つまり、第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１は、第２蓋部材２７によってＺ方向の動きが規制される。 Similarly, the 2nd cover member 27 is attached so that the 2nd opening part 13b of the housing | casing 13 may be obstruct | occluded. The fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are urged by the spring member 27 a of the second lid member 27, respectively. That is, the movement of the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 in the Z direction is restricted by the second lid member 27.
　このように、第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６および第４触媒カセット１７は、Ｘ方向とＹ方向とＺ方向との動きが規制される。同様に、第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１は、Ｘ方向とＹ方向とＺ方向との動きが規制される。つまり、各触媒カセットは、触媒反応器１２と一体的に固定される。 Thus, the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, and the fourth catalyst cassette 17 are restricted from moving in the X direction, the Y direction, and the Z direction. Similarly, the fifth catalyst cassette 18, the sixth catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are restricted from moving in the X, Y, and Z directions. That is, each catalyst cassette is fixed integrally with the catalyst reactor 12.
　以上の如く、触媒であるＮＯｘ触媒が収容された複数の触媒カセットである第１触媒カセット１４、第２触媒カセット１５、第３触媒カセット１６、第４触媒カセット１７、第５触媒カセット１８、第６触媒カセット１９、第７触媒カセット２０および第８触媒カセット２１を内部に着脱自在に装着可能な触媒反応器１２を備える排気浄化装置１において、触媒反応器１２の内部に開口部である第１開口部１３ａ、第２開口部１３ｂから隣り合うように装入された各触媒カセットの触媒カセットと触媒カセットとの隙間Ｇにくさび状部材である第１くさび状部材２２、第２くさび状部材２３、第３くさび状部材２４、第４くさび状部材２５が挿入され、第１開口部１３ａ、第２開口部１３ｂを閉塞する蓋部材である第１蓋部材２６、第２蓋部材２７によって装入された各触媒カセットが付勢されるものである。
　このように構成することで、各くさび状部材によってＸ方向およびＹ方向の動きが規制され、第１蓋部材２６、第２蓋部材２７によってＺ方向の動きが規制される。これにより、第１触媒カセット１４から第８触媒カセット２１や触媒反応器１２の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 As described above, the first catalyst cassette 14, the second catalyst cassette 15, the third catalyst cassette 16, the fourth catalyst cassette 17, the fifth catalyst cassette 18, the second catalyst cassette 18, which are a plurality of catalyst cassettes in which the NOx catalyst as the catalyst is accommodated. In the exhaust gas purification apparatus 1 including the catalyst reactor 12 in which the six catalyst cassette 19, the seventh catalyst cassette 20, and the eighth catalyst cassette 21 are detachably mounted, a first opening that is an opening in the catalyst reactor 12 is provided. A first wedge-shaped member 22 and a second wedge-shaped member 23 that are wedge-shaped members are formed in a gap G between the catalyst cassette and the catalyst cassette of each catalyst cassette inserted adjacent to each other from the opening 13a and the second opening 13b. The first wedge member 26 and the second lid portion, which are lid members for inserting the third wedge member 24 and the fourth wedge member 25 and closing the first opening 13a and the second opening 13b. Each catalyst cassette was charged by 27 is intended to be energized.
With this configuration, the movement in the X direction and the Y direction is regulated by each wedge-shaped member, and the movement in the Z direction is regulated by the first lid member 26 and the second lid member 27. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　また、各くさび状部材が、各くさび状部材の挿入方向に移動自在に触媒反応器１２に支持されるものである。
　このように構成することで、各触媒カセットが各くさび状部材を介して触媒反応器１２と一体的に固定される。これにより、第１触媒カセット１４から第８触媒カセット２１や触媒反応器１２の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 Each wedge-shaped member is supported by the catalyst reactor 12 so as to be movable in the insertion direction of each wedge-shaped member.
By comprising in this way, each catalyst cassette is integrally fixed with the catalyst reactor 12 via each wedge-shaped member. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　また、各くさび状部材が、ねじ機構である左ねじ部２８ａ、胴部２８ｂおよび右ねじ部２８ｃによって伸縮自在に構成される連結部材２８を介して触媒反応器１２に支持されるものである。
　このように構成することで、連結部材２８に構成されるねじ機構によって各くさび状部材のくさび効果が増大されて各触媒カセットが強固に固定される。これにより、第１触媒カセット１４から第８触媒カセット２１や触媒反応器１２の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 Each wedge-shaped member is supported by the catalyst reactor 12 via a connecting member 28 that is configured to be extendable and contractable by a left screw portion 28a, a barrel portion 28b, and a right screw portion 28c, which are screw mechanisms.
With this configuration, the wedge effect of each wedge-shaped member is increased by the screw mechanism configured in the connecting member 28, and each catalyst cassette is firmly fixed. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　また、第１蓋部材２６、第２蓋部材２７には、各触媒カセットを付勢する弾性部材であるばね部材２６ａ、２７ａが備えられるものである。
　このように構成することで、各触媒カセットや触媒反応器１２が熱膨張しても第１蓋部材２６、第２蓋部材２７による付勢力が維持される。これにより、第１触媒カセット１４から第８触媒カセット２１や触媒反応器１２の製作誤差による隙間にばらつきが生じても熱膨張や振動等によるカセットの移動や破損を抑制することができる。 The first lid member 26 and the second lid member 27 are provided with spring members 26a and 27a, which are elastic members that urge the respective catalyst cassettes.
With this configuration, the urging force by the first lid member 26 and the second lid member 27 is maintained even if each catalyst cassette or the catalyst reactor 12 is thermally expanded. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of the cassette due to thermal expansion or vibration can be suppressed.
　次に、図７および図８を用いて、本発明に係る排気浄化装置の第二実施形態である排気浄化装置１について説明する。なお、以下の実施形態において、既に説明した実施形態と同様の点に関してはその具体的説明を省略し、相違する部分を中心に説明する。 Next, an exhaust purification apparatus 1 that is a second embodiment of the exhaust purification apparatus according to the present invention will be described with reference to FIGS. In the following embodiments, the same points as those of the above-described embodiments will not be specifically described, and different portions will be mainly described.
　図７（ａ）に示すように、各くさび状部材は、連結部材２９を介して筐体１３に支持される。連結部材２９は、途中部にねじ機構とばね機構とによって伸縮自在に構成される略棒状の部材である。連結部材２９は、左ねじ部２９ａ、胴部２９ｂ、右ねじ部２９ｃ、スライド軸２９ｄおよびばね２９ｅから構成される。 As shown in FIG. 7A, each wedge-shaped member is supported by the housing 13 via a connecting member 29. The connecting member 29 is a substantially rod-like member that is configured to be stretchable by a screw mechanism and a spring mechanism in the middle. The connecting member 29 includes a left screw portion 29a, a body portion 29b, a right screw portion 29c, a slide shaft 29d, and a spring 29e.
　右ねじ部２９ｃは、一方の端部に取付ブラケットが形成される中空円筒状の右ねじの雄ねじからなる。連結部材２９は、胴部２９ｂの一側に左ねじ部２９ａに接続され、胴部２９ｂの他側に右ねじ部２８ｃが接続される。これにより、連結部材２９には、ねじ機構が構成される。スライド軸２９ｄは、一方の端部に取付ブラケットが形成される棒状部材からなる。スライド軸２９ｄは、圧縮ばねから構成されるばね２９ｅを介して右ねじ部２９ｃの中空部分に隙間なく摺動可能に挿入される。これにより、連結部材２９には、所定の付勢力によりスライド軸２９ｄが軸方向に摺動するばね機構が構成される。スライド軸２９ｄの取付ブラケットには、各くさび状部材がそれぞれ取り付けられる。 The right-hand thread portion 29c is a hollow-cylindrical right-hand male screw having a mounting bracket formed at one end. The connecting member 29 is connected to the left screw portion 29a on one side of the trunk portion 29b, and the right screw portion 28c is connected to the other side of the trunk portion 29b. As a result, the connecting member 29 is configured with a screw mechanism. The slide shaft 29d is made of a rod-shaped member having a mounting bracket formed at one end. The slide shaft 29d is slidably inserted into the hollow portion of the right screw portion 29c via a spring 29e formed of a compression spring without any gap. Thereby, the connecting member 29 is configured with a spring mechanism in which the slide shaft 29d slides in the axial direction by a predetermined urging force. Each wedge-shaped member is attached to the mounting bracket of the slide shaft 29d.
　図７（ｂ）に示すように、各くさび状部材は、ねじ機構によって連結部材２９の全長を伸ばして各触媒カセットの枠体と枠体との隙間Ｇに挿入可能に構成されるとともに、連結部材２９のばね機構のばね２９ｅをたわまして各触媒カセットを一定の力で付勢可能に構成される。 As shown in FIG. 7B, each wedge-shaped member is configured such that it can be inserted into the gap G between the frame body of each catalyst cassette by extending the entire length of the connection member 29 by a screw mechanism. Each catalyst cassette is configured to be biased with a constant force by bending a spring 29e of a spring mechanism of the member 29.
　以下では、本発明に係る排気浄化装置の第二実施形態である排気浄化装置１における各触媒カセットの固定の態様について説明する。 Hereinafter, the manner of fixing each catalyst cassette in the exhaust purification device 1 which is the second embodiment of the exhaust purification device according to the present invention will be described.
　各触媒カセットが第１取付フレーム１３ｃまたは第２取付フレーム１３ｄに挿入された後、第１くさび状部材２２を支持する連結部材２９のねじ機構が操作され、連結部材２９が伸長される。第１くさび状部材２２は、第１触媒カセット１４の枠体と第２触媒カセット１５の枠体との隙間Ｇに挿入される。この際、連結部材２９のばね機構のばね２９ｅがねじ機構の操作による伸長量に応じてたわむ。第１くさび状部材２２は、第１触媒カセット１４と第２触媒カセット１５とをばね２９ｅのたわみ量に応じた力で付勢する。これにより、第１触媒カセット１４と第２触媒カセット１５とは、第１くさび状部材２２よってＸ方向およびＹ方向の動きが規制される。 After each catalyst cassette is inserted into the first mounting frame 13c or the second mounting frame 13d, the screw mechanism of the connecting member 29 that supports the first wedge-shaped member 22 is operated, and the connecting member 29 is extended. The first wedge-shaped member 22 is inserted into the gap G between the frame body of the first catalyst cassette 14 and the frame body of the second catalyst cassette 15. At this time, the spring 29e of the spring mechanism of the connecting member 29 bends in accordance with the extension amount due to the operation of the screw mechanism. The 1st wedge-shaped member 22 urges | biases the 1st catalyst cassette 14 and the 2nd catalyst cassette 15 with the force according to the deflection amount of the spring 29e. Thereby, the movement of the first catalyst cassette 14 and the second catalyst cassette 15 in the X direction and the Y direction is restricted by the first wedge-shaped member 22.
　同様に、第３触媒カセット１６と第４触媒カセット１７とは第２くさび状部材２３によって、第５触媒カセット１８と第６触媒カセット１９とは第３くさび状部材２４によって、第７触媒カセット２０と第８触媒カセット２１とは第４くさび状部材２５によって、Ｘ方向およびＹ方向の動きが規制される。 Similarly, the third catalyst cassette 16 and the fourth catalyst cassette 17 are provided by the second wedge-shaped member 23, and the fifth catalyst cassette 18 and the sixth catalyst cassette 19 are provided by the third wedge-shaped member 24, thereby providing the seventh catalyst cassette 20. And the eighth catalyst cassette 21 are restricted in movement in the X direction and the Y direction by the fourth wedge-shaped member 25.
　以上の如く、各くさび状部材がばね機構のばね２９ｅによって各くさび状部材の挿入方向に付勢されるものである。
　このように構成することで、各触媒カセットや触媒反応器１２が熱膨張しても各くさび状部材による付勢力が維持される。これにより、第１触媒カセット１４から第８触媒カセット２１や触媒反応器１２の製作誤差による隙間にばらつきが生じても熱膨張や振動等による各触媒カセットの移動や破損を抑制することができる。 As described above, each wedge-shaped member is urged in the insertion direction of each wedge-shaped member by the spring 29e of the spring mechanism.
By configuring in this way, the urging force of each wedge-shaped member is maintained even if each catalyst cassette or catalyst reactor 12 is thermally expanded. Thereby, even if the gap due to the manufacturing error of the first catalyst cassette 14 to the eighth catalyst cassette 21 or the catalyst reactor 12 varies, the movement or breakage of each catalyst cassette due to thermal expansion or vibration can be suppressed.
　また、外部からの振動が小さい場合や製作誤差による隙間が小さい場合において、各触媒カセットと触媒反応器１２との摩擦力で十分な固定力が得られるときは、各くさび状部材または各ばね部材のうちどちらか一方による固定でもよい。具体的には、各触媒カセットのＸ方向とＹ方向との動きが各くさび状部材によって規制され、Ｚ方向の動きが各触媒カセットと触媒反応器１２との摩擦力で固定される構成でもよい。 Further, when a sufficient fixing force can be obtained by the frictional force between each catalyst cassette and the catalyst reactor 12 when the external vibration is small or the gap due to manufacturing error is small, each wedge-shaped member or each spring member It may be fixed by either one of them. Specifically, the movement of each catalyst cassette in the X direction and the Y direction may be regulated by each wedge-shaped member, and the movement in the Z direction may be fixed by the frictional force between each catalyst cassette and the catalyst reactor 12. .
　本発明は、内燃機関の排気浄化装置の技術に利用することが可能である。 The present invention can be used in the technology of an exhaust gas purification device for an internal combustion engine.
　　１　　排気浄化装置
　１２　　装置ケース
　１３ａ　第１開口部
　１３ｂ　第２開口部
　１４　　第１触媒カセット
　１５　　第２触媒カセット
　１６　　第３触媒カセット
　１７　　第４触媒カセット
　１８　　第５触媒カセット
　１９　　第６触媒カセット
　２０　　第７触媒カセット
　２１　　第８触媒カセット
　２２　　第１くさび状部材
　２３　　第２くさび状部材
　２４　　第３くさび状部材
　２５　　第４くさび状部材
　２６　　第１蓋部材
　２７　　第２蓋部材
　　Ｇ　　隙間 DESCRIPTION OF SYMBOLS 1 Exhaust gas purification apparatus 12 Apparatus case 13a 1st opening part 13b 2nd opening part 14 1st catalyst cassette 15 2nd catalyst cassette 16 3rd catalyst cassette 17 4th catalyst cassette 18 5th catalyst cassette 19 6th catalyst cassette 20 7th Catalyst cassette 21 Eighth catalyst cassette 22 First wedge member 23 Second wedge member 24 Third wedge member 25 Fourth wedge member 26 First lid member 27 Second lid member G Gap

Claims (5)

  1. 　触媒が収容された複数の触媒カセットを内部に着脱自在に装着可能な触媒反応器を備える排気浄化装置において、
    　触媒反応器の内部に開口部から隣り合うようにして装入された触媒カセットと触媒カセットとの隙間にくさび状部材が挿入され、開口部を閉塞する蓋部材によって装入された触媒カセットが付勢される排気浄化装置。     In an exhaust emission control device comprising a catalyst reactor that can be detachably mounted inside a plurality of catalyst cassettes containing a catalyst,
    A wedge-shaped member is inserted into the gap between the catalyst cassette and the catalyst cassette loaded adjacent to each other from the opening inside the catalyst reactor, and the catalyst cassette loaded by a lid member closing the opening is attached. Exhaust gas purification device.
  2. 　前記くさび状部材が、くさび状部材の挿入方向に移動自在に前記触媒反応器に支持される請求項１に記載の排気浄化装置。 The exhaust purification device according to claim 1, wherein the wedge-shaped member is supported by the catalytic reactor so as to be movable in the insertion direction of the wedge-shaped member.
  3. 　前記くさび状部材が、ねじ機構によって伸縮自在に構成される連結部材を介して前記触媒反応器に支持される請求項１または請求項２に記載の排気浄化装置。 The exhaust purification device according to claim 1 or 2, wherein the wedge-shaped member is supported by the catalytic reactor via a connecting member configured to be extendable and contractable by a screw mechanism.
  4. 　前記くさび状部材が、ばね機構によってくさび状部材の挿入方向に付勢される請求項１から請求項３のいずれか一項に記載の排気浄化装置。 The exhaust emission control device according to any one of claims 1 to 3, wherein the wedge-shaped member is biased in a direction in which the wedge-shaped member is inserted by a spring mechanism.
  5. 　前記蓋部材には、前記触媒カセットを付勢する弾性部材が備えられる請求項１から請求項４のいずれか一項に記載の排気浄化装置。 The exhaust purification device according to any one of claims 1 to 4, wherein the lid member is provided with an elastic member that urges the catalyst cassette.
PCT/JP2014/054463 2013-03-27 2014-02-25 Exhaust gas purification device WO2014156426A1 (en)

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JP6442426B2 (en) * 2016-03-24 2018-12-19 ヤンマー株式会社 Catalytic reactor and ship equipped with the same
JP6444329B2 (en) 2016-03-24 2018-12-26 ヤンマー株式会社 Catalytic reactor and ship equipped with the same.
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