JP3669441B1 - Particulate removal device and diesel vehicle equipped with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a diesel particulate removal device capable of easily regenerating a clogged filter at low cost.
SOLUTION: An outer pipe 4 incorporated in an exhaust path 2 of a diesel engine 1 and having openings on the inflow side and the outflow side of a diesel exhaust gas 3, and the diesel exhaust gas being received in the outer pipe 4 3 is a diesel particulate removal apparatus comprising a plurality of filter units 5 and 5 for capturing or capturing and removing the particulates in the combustion chamber 3, wherein the plurality of filter units 5 and 5 are connected to the diesel exhaust gas 3. Are connected to each other along the flow of the diesel exhaust gas 3 and combined with the inlet pipe 6 and the outlet pipe 7 of the diesel exhaust gas 3 to form an inner pipe of a sealed structure except for the inflow side and the outflow side. Yes.
[Selection] Figure 1

Description

  The present invention relates to a particulate removal device, and in particular, captures particulates contained in the exhaust of an internal combustion engine such as a diesel engine used in a diesel vehicle, a generator, an agricultural equipment, or the like, or captures the captured particulates. The present invention relates to a particulate removal device suitable for use in combustion removal and a diesel vehicle equipped with the removal device.

Conventionally, attention to the regulation of automobile exhaust gas has been directed to nitrogen oxide (NOx) mainly composed of nitrogen dioxide, which is a carcinogenic substance.
By the way, there are a lot of carbon particulates (so-called black smoke) in the exhaust gas of diesel vehicles, and these carbon particulates flew into the air for a long time after being exhausted into the air through the exhaust passage. In particular, it becomes a kite or the like and falls on the floor, road surface, clothes, etc. By the way, since carbon adsorbs things well, various chemical substances such as carcinogenic substances are adsorbed by carbon fine particles floating in the air, and humans inhale these carbon fine particles into the human body. In recent years, it has been reported that cancer and respiratory diseases are caused.

  For this reason, not only nitrogen oxide (NOx) but also emission control of particulate matter (PM) from diesel vehicles has become an important issue. Therefore, as a means for protecting environmental air from diesel black smoke contamination, there is provided a black smoke collection device in which a black smoke removal filter made of metal fibers, honeycomb-shaped elements, etc. is installed in the exhaust passage of a diesel engine mounted on a vehicle. (For example, refer to Patent Document 1 and Patent Document 2).

However, when this type of black smoke removal filter is used for a long period of time, there is a drawback in that it is clogged by the collected black smoke and pressure loss increases.
As means for resolving clogging of black smoke, diesel particle removal devices that regenerate the filter function by burning trapped particles have been proposed (see, for example, Patent Document 3, Patent Document 4, and Patent Document 5).
This type of apparatus includes a cylindrical container having an inlet and an outlet for exhaust gas, a heater provided on the inlet side in the cylindrical container, a porous foam filter disposed adjacent to the subsequent stage of the heater, And a catalyst-carrying filter disposed adjacent to the latter stage of the porous foam filter.

In such a configuration, the exhaust gas introduced from the inlet is ignited and burned in contact with a heated heater made of ceramic or metal, and unburned particles are captured and removed by the porous foam filter and the catalyst-carrying filter. . At this time, the heat of the heater and the exhaust gas is conducted to the porous foam filter, and the unburned particles captured by the porous foam filter are ignited and burned. In the downstream catalyst-carrying filter, the conduction heat from the heater and the exhaust gas decreases, so the temperature decreases. However, the catalyst carried on the catalyst-carrying filter promotes the combustion of trapped particles, so misfiring. Instead, many trapped particles are burned off at a relatively low temperature and the filter function is regenerated.
Japanese Utility Model Publication No. 61-55114 Japanese Utility Model Publication No. 61-84851 JP-A-2-173310 Japanese Patent Application Laid-Open No. Hei 6-212954 JP-A-8-193509

  However, although the configuration in which the heater built in the apparatus has a filter regeneration function is ideal, it has the disadvantages that it is complicated and expensive and has poor durability.

On the other hand, even if the filter has not yet been clogged, if exhaust gas containing a large amount of oxygen together with black smoke suddenly flows into the diesel particle removal device, unburned particles will be generated in the diesel particle removal device. A phenomenon called so-called oxygen flash that burns explosively is caused, which may damage the filter and the like.
For example, when the accelerator is depressed after using an exhaust brake that shuts off and brakes on a long downhill, etc., exhaust containing high concentrations (for example, 4 times normal) of oxygen together with diesel particulates When the gas suddenly flows into the diesel particle removing device, diesel particulate combustion occurs explosively and reaches approximately 1500 ° C., so that there is a possibility that, for example, a metal filter is blown out.

  The present invention has been made in view of the above-described circumstances, and provides a particulate removal device that can easily and inexpensively regenerate a filter that has progressed clogging, and a diesel vehicle including the removal device. The first purpose.

  Further, a particulate removing device capable of preventing explosive combustion of particulates in a gas due to any cause, and capable of preventing burning of the device due to this even if explosive combustion occurs, and a diesel vehicle equipped with the removing device The second purpose is to provide the above.

In order to solve the above-mentioned problems, an invention according to claim 1 is incorporated in a gas flow path, and has an outer pipe having openings on the inflow side and the outflow side of the gas, The particulate filter includes a plurality of filter units for capturing or capturing and removing the particulates in the gas by burning, and the plurality of filter units have a filter housed in a short internal cylinder portion. together comprising Te, along the flow of the gas, are connected to each other, further, the is also combined with the inlet pipe and the outlet pipe of the gas, except the inflow side and the outflow side, the inner tube of the elongated sealing structure And an opening for attaching / detaching with a lid for attaching or removing each filter unit is provided on a side surface of the outer tube .

  Further, the invention according to claim 2 relates to the particulate removing device according to claim 1, wherein the filter unit is disposed between the plurality of filters, between the filter unit disposed on the most upstream side, and the inlet pipe. A gasket is inserted between the filter unit disposed on the downstream side and the outlet pipe to form an inner pipe having a sealed structure.

Further, the invention according to claim 3 relates to the particulate removing device according to claim 2, wherein the joint pipe with the gasket for connecting the plurality of filter units to each other is added to the inner pipe. It is characterized by.

According to a fourth aspect of the invention, there is provided the particulate removing apparatus according to the third aspect, wherein when the inner tube is assembled, the lid of the detachable opening is opened, and the detachable opening is While each filter unit is inserted and the inner tube is assembled, when the inner tube is disassembled, an attachment / detachment means for taking out each filter unit from the attachment / detachment opening is provided.

  According to a fifth aspect of the present invention, there is provided the particulate removing apparatus according to the fourth aspect, wherein the attaching / detaching means has one or a plurality of long bolts.

  According to a sixth aspect of the present invention, there is provided the particulate removing apparatus according to the fourth aspect, wherein the attaching / detaching means includes one or a plurality of long bolts and a double nut.

  A seventh aspect of the invention relates to the particulate removing apparatus according to the first aspect, wherein the inner pipe is fixed to the outer pipe in an axial gap between the inner pipe and the outer pipe on the outflow side or the inflow side. In addition, a leaf spring member for absorbing thermal expansion is provided.

The invention according to claim 8 relates to the particulate removing apparatus according to claim 1, wherein when the inner tube is assembled, the lid of the detachable opening is opened, and the detachable opening An attachment / detachment means having one or a plurality of long bolts for inserting each filter unit and assembling the inner tube while taking out the filter unit from the attachment / detachment opening when disassembling the inner tube. The long bolt of the attaching / detaching means is inserted into the inflow side end surface or the outflow side end surface of the outer tube, and the axial gap between the inner tube and the outer tube on the outflow side or the inflow side is provided. A leaf spring member for absorbing thermal expansion is provided, and when the long bolt is tightened, the leaf spring member is compressed and deformed so that the inner tube is fixed to the outer tube. It is characterized by being.

  The invention according to claim 9 relates to the particulate removing apparatus according to claim 8, wherein the leaf spring member has a disc spring provided with an opening through which the inlet pipe or the outlet pipe is inserted at a central portion. It is characterized by consisting of.

  Further, the invention according to claim 10 relates to the particulate removing apparatus according to claim 8, wherein a gap between the inner tube and the outer tube causes an emergency of the exhaust gas when the pressure in the inner tube increases rapidly. It is characterized by being configured to function as a time bypass channel.

An eleventh aspect of the invention relates to the particulate removing device according to the tenth aspect of the invention, and when the pressure in the inner pipe rapidly increases, the exhaust gas is caused to flow through the emergency detour channel in the inner pipe. A safety valve is provided.
A twelfth aspect of the present invention relates to the particulate removing apparatus according to the first aspect of the invention, and is characterized in that a clogging sensor for notifying the clogging of the filter is added.

  A thirteenth aspect of the present invention relates to the particulate removing apparatus according to any one of the first to twelfth aspects, and is incorporated in the exhaust path of the diesel engine, and is opened to the inflow side and the outflow side of the diesel exhaust gas. And a plurality of filters that are received in the outer tube and capture or capture and remove the particulates in the diesel exhaust gas by combustion.

  The invention described in claim 14 relates to a diesel vehicle, characterized in that the particulate removing device described in claim 13 is provided.

  As described above, according to the configuration of the present invention, a filter that has progressed clogging can be easily and inexpensively regenerated. Moreover, the explosive combustion of the diesel particulates for some reason can be prevented, and even if explosive combustion occurs, the apparatus can be prevented from being burned out.

  For the purpose of easily regenerating a clogged filter at a low cost, it has a double tube structure with an outer tube and an inner tube made up of a filter, etc., with a lid for attaching and detaching the filter as the inner tube This was realized by providing an opening for attaching and detaching to the outer tube. The filter taken out from the outer tube is regenerated by burning the particles in the regeneration furnace.

Embodiments of the present invention will be described below with reference to the drawings. The description will be made specifically with reference to examples.
FIG. 1 is a schematic cross-sectional view showing a schematic configuration of a diesel particulate removing device according to an embodiment of the present invention.
The diesel particulate removal device 1 of this example is mounted on a diesel vehicle, and is connected to the exhaust path 2 of the diesel engine 1 and has openings on the inflow side and the outflow side of the diesel exhaust gas 3 as shown in FIG. An outer pipe 4 and a plurality (two in this example) of filter units 5 and 5 that are attached to the outer pipe 4 and trap or capture and remove particulates in the diesel exhaust gas 3 The plurality of filter units 5, 5 are connected to each other along the flow of the diesel exhaust gas 3, and are also combined with the inlet pipe 6 and the outlet pipe 7 of the diesel exhaust gas 3. Thus, except for the inflow side and the outflow side, an inner tube 8 having a sealed structure is formed, and a double tube structure is formed as a whole.

FIG. 2 is an exploded view showing the internal configuration of the diesel particulate removing device 1 in an exploded manner.
As shown in the figure, two cylindrical PM (particulate material; graphite particulate removal) filter units 5 and 5 in combination with a front stage and a rear stage, and a joint pipe 9 with a gasket for joining these filter units 5 and 5, The inflow pipe 6 and the outflow pipe 7 are fastened and fixed by an attaching / detaching means 12 having a bolt and nut structure to constitute an inner pipe 8 having a confidential structure. A front lid portion 8B of an inner tube 8 is welded to the inlet pipe 6, and a rear lid portion 8C of the inner tube 8 is welded to the outlet tube 7. Between the filter unit 5 arranged on the upstream side and the front lid part 8B (inlet pipe 6), between the filter unit 5 arranged on the downstream side and the rear lid part 8C (outlet pipe 7), An annular gasket (not shown) is inserted to ensure a sealing structure. These gaskets are configured by covering both surfaces of an annular metal plate with carbon particles.
Each filter unit 5 includes a short inner cylinder portion 5A, a roll-shaped filter portion 5B housed in the inner cylinder portion 5A with a common axial center, and a cross-shaped filter receiver 5C along the axis. The three- or four-blade blades 5D are roughly configured. The three-blade or four-blade blade 5D secures a ring-shaped gap (emergency bypass flow path K) between the outer peripheral surface of the inner tube 8 and the inner peripheral surface of the outer tube 4, as will be described later. To contribute.
In addition to the inlet pipe 6, a disc spring abutment 20 and a bypass valve (safety valve) 15 are attached to the front lid portion 8 </ b> B as will be described later.

  The outer tube 4 is generally composed of a long outer cylinder portion 4A with a double-sided opening, a front lid portion 4B, and a disc-shaped rear lid portion 4C. The front lid portion 4B includes an inlet pipe of the inner tube 8. An opening through which 6 is inserted is provided. Further, the rear lid portion 4C is provided with an opening through which the outlet pipe 7 of the inner pipe 8 is inserted. Further, as shown in FIGS. 3 and 4, an attachment / detachment opening 11 with a side cover 10 for attaching or removing each filter unit 5 or the like is provided on the peripheral side surface of the outer tube 4.

  The rear lid portion 4C is provided with attachment / detachment means 12 for detachably joining the inner tube 8 and the outer tube 13 for housing the inner tube 8 therein. As shown in FIGS. 4, 5, and 6, the attaching / detaching means 12 includes one or more (in this example, a plurality) long bolts 13 </ b> A, 13 </ b> A,... And nuts (preferably double nuts) 13 </ b> B, 13 </ b> B, It consists of ... A force receiving plate 13C for receiving the pressing force of the long bolts 13A, 13A,... Is fitted and welded to the side peripheral surface of the outlet pipe 7 of the inner pipe 8.

  The axial gap between the inner tube 8 and the outer tube 4 on the inflow side, that is, the axial gap between the front lid portion 8B of the inner tube 8 and the front lid portion 4B of the outer tube 4, as shown in FIG. A disc spring 14 made of a leaf spring member is provided to press and fix the inner tube 8 to the outer tube 4 through the disc spring abutment 20 and absorb thermal expansion. An opening for inserting the inlet pipe 6 of the inner pipe 4 is provided at the center of the disc spring 14.

In the configuration of this example, when the pressure of the exhaust gas 3 of the inner pipe 8 suddenly increases for some reason during operation of the diesel engine, it is between the outer peripheral surface of the inner pipe 8 and the inner peripheral surface of the outer pipe 4. The gap having a ring-shaped cross section serves as an emergency detour channel K for avoiding explosive combustion such as oxygen flash (FIGS. 1 and 6). For this reason, the inner pipe 8 is provided with a bypass valve (safety valve) 15 that causes the exhaust gas to flow into the emergency bypass flow path K when the pressure in the inner pipe 8 suddenly increases (FIG. 1).
In the bypass valve 15, a valve rod (not shown) normally closes the valve by the spring force of a compression coil spring (not shown), but when an abnormality occurs, the exhaust pressure in the inner pipe 8 reaches a predetermined threshold pressure. If exceeded, the valve rod is retracted by the exhaust pressure in the inner pipe 8 to open the valve, from which the exhaust gas in the inner pipe 8 flows into the outer peripheral surface of the inner pipe 8 and the inner peripheral surface of the outer pipe 4. It flows into the gap with a cross-section annular zone (emergency bypass flow path K) between the two and discharged to the outside of the pipe.
In addition to the bolt insertion hole, an emergency discharge port is perforated in the rear cover portion 4C of the outer tube 4 and serves as an outlet for the exhaust gas 3 via the emergency detour channel K. Furthermore, for safety, pressure sensors (clogging sensors) 16 that notify clogging of the filter units 5 and 5 are provided on the upstream side and the downstream side, and a temperature sensor is also provided in the center of the apparatus. . A collision plate 17 is provided on the upstream side of the upstream filter unit 5 in order to decelerate the diesel exhaust gas 3 introduced from the inlet pipe 6 at a high speed and to uniformly distribute the diesel exhaust gas 3 in the filter unit 5. ing.

Next, the filter unit 5B which is a core part of the filter unit 5 will be described with reference to FIGS. 1 and 8 to 10.
As shown in FIG. 1, the filter unit 5 </ b> B is generally configured by a platinum-based oxidation catalyst 18 and a metal filter 19 supported on a metal mesh provided on the upstream side.
FIG. 8 is a partially enlarged perspective view schematically showing the configuration of the metal filter 19 incorporated in the filter unit constituting the apparatus of this example.
In the metal filter of this example, as shown in FIG. 8, a large number of through-holes 102 having a planar protrusion 101 are formed at the edge, and a metal plate that repeats undulation of a sine wave is wound up in a multi-layered spiral shape. A filter made of a corrugated roll-shaped metal porous body 103, passing diesel exhaust gas through an interlayer gap of the metal porous body 103, and capturing and removing black smoke particulates contained in the diesel exhaust gas, The through-holes 102 are provided in the ridges M and valleys V that form the row of undulations. And the planar protrusion 101 is provided so that it may protrude in the row-shaped recessed part 105 side.

FIG. 9 is a partially enlarged cross-sectional view schematically showing the configuration of another type of metal filter incorporated in the filter unit constituting the apparatus of this example, and FIG. 10 is a partial schematic view of the configuration of the metal filter. It is an expansion perspective view.
As shown in FIGS. 9 and 10, this different type of metal filter has a corrugated metal plate 26 that repeats undulation of a sine wave, and is substantially flat and corrugated compared to the corrugated metal plate 26. A metal flat plate 27 having a width substantially the same as the width of the metal plate 26 is wound up in multiple layers in a state where they are overlapped with each other. The corrugated metal plate 27 has a large number of through-holes 29 each having a planar projection 28 at the edge, and is a rolled metal perforated metal plate 27 that is repeatedly rolled up and down in a sine wave. It consists of a body 30. On the other hand, the metal flat plate 27 has a large number of through holes 31 that do not have a planar protrusion.

Next, the operation of this example will be described.
Mounting of the filter units 5 and 5 First, when the filter units 5 and 5 are mounted in the outer tube 4, in other words, when the inner tube 8 is assembled in the outer tube 4, the front lid portion 8B (inlet port) In a state where the tube 6) and the rear cover 8C (outlet tube 7) are mounted in the outer tube 4 in advance, the side cover 10 of the attachment / detachment opening 11 is opened, and each filter is removed from the attachment / detachment opening 11. The units 5 and 5, the joint pipe 9 with the gasket, another type of gasket (not shown) and the like are inserted. Next, the long bolt 1A of the attaching / detaching means 12 is inserted into the bolt insertion hole of the rear cover 4C of the outer tube 4, and a nut (double nut) 13B is screwed in using a tool to connect the inner tube 8 and the outer side on the inflow side. The disc spring 14 inserted is pressed into the axial gap with the tube 4 (FIGS. 7, 11, and 12). When the long bolt 13A is tightened, the disc spring 14 is compressed and deformed. Thus, the inner tube 8 is pressed and fixed to the outer tube 4, and the inner tube 8 having a confidential structure is formed.

Operation of Black Smoke Fine Particle Removal Device The black smoke fine particle removal device having the above-described configuration is used by being incorporated in an exhaust path of a diesel vehicle, that is, a diesel engine. When the diesel engine is operated, when the diesel exhaust gas passes through the interlayer gap 4 of the metal filter, as shown in FIG. Since it works as a course changing piece or as a through-hole introducing piece, the black smoke fine particles floating in the exhaust gas are easily captured on the front and back surfaces of the metal filter 19 in the vicinity of the planar protrusion 101 and the through-hole 102. . Part of the black smoke fine particles captured by the metal filter 19 is heated and burned by the high-temperature metal filter 19 and the ambient atmosphere (exhaust gas 3), removed from the metal filter 19, and the rest It remains attached to the metal filter 19. As a result, the flow F of the exhaust gas 3 that has passed through the metal filter 19 is exhausted as a normal gas that does not contain black smoke particles.

When the removal / regeneration filter unit 5 (metal filter 19) of the filter units 5 and 5 is clogged, the pressure sensor (clogging sensor) 16 notifies the clogging of the filter units 5 and 5. Thereafter, the operator disassembles the inner tube 8 and takes out the clogged filter units 5 and 5.
When removing the clogged filter units 5 and 5, the side cover 10 of the opening 11 for attachment / detachment is opened, and the long bolt 1 </ b> A of the attachment / detachment means 12 attached to the rear cover 4 </ b> C of the outer tube 4 is used with a tool. Use and loosen. Then, the disc spring 14 is released from the compression, and each part constituting the inner pipe 8 (the filter units 5 and 5, the joint pipe 9 with the gasket, the front lid part 8B (inlet pipe 6), the rear lid part 8C (outlet) The tube 7) is uncoupled and disassembled (FIGS. 7, 11, and 12), so that the operator takes out the clogged filter units 5 and 5 from the opened opening 11 for attachment and detachment. In this regenerative furnace, heating is performed at a predetermined temperature for a predetermined time, whereby the particles clogging the filter units 5 and 5 are burned, and as a result, the filter units 5 and 5 are regenerated.
In addition, what is taken out from the opening 11 for attachment / detachment is not restricted to the filter units 5 and 5, but the joint pipe 9 with a gasket, the front cover part 8B (inlet pipe 6), and the rear cover part 8C as needed. The (outlet pipe 7) or the like may be removed, or these may be left in the outer pipe 4.

Reattaching the filter units 5 and 5 Next, when reattaching the filter units 5 and 5 into the outer tube 4, the side cover 10 of the attachment / detachment opening 11 is opened again, and the attachment / detachment opening 11 is opened. The filter units 5 and 5 are inserted. Next, the long bolt 1A of the attaching / detaching means 12 is inserted into the bolt insertion hole of the rear cover 4C of the outer tube 4, and a nut (double nut) 13B is screwed in using a tool to connect the inner tube 8 and the outer side on the inflow side. The disc spring 14 inserted is pressed into the axial gap with the tube 4 (FIGS. 7, 11, and 12). When the long bolt 13A is tightened, the disc spring 14 is compressed and deformed. Thus, the inner tube 8 is pressed and fixed to the outer tube 4, and the inner tube 8 having a confidential structure is formed again, and the remounting is completed.

Operation of the safety device During operation of the diesel engine, when the pressure of the exhaust gas 3 in the inner pipe 8 suddenly increases for some reason, the bypass valve (safety valve) 15 opens. As a result, the exhaust gas 3 in a high pressure state passes through the emergency bypass flow path K between the outer peripheral surface of the inner tube 8 and the inner peripheral surface of the outer tube 4 via the opened bypass valve (safety valve) 15. Then, it is discharged to the external space from the emergency discharge port drilled in the rear lid portion 4C of the outer tube 4 (FIGS. 1 and 6). Thus, danger and unpleasantness due to explosive combustion such as oxygen flash can be prevented.

The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. Included in the invention. For example, in the above-described embodiment, the attachment / detachment means 12 for detachably joining the inner tube 8 and the outer tube 13 is provided on the exhaust gas outflow side. The detachable means 12 may be provided on the side. The attachment / detachment means is not limited to the long bolts 13A, 13A,... And the nuts (double nuts) 13B, 13B,.
In the above-described embodiment, the leaf spring member (the disc spring 14) is provided in the axial gap between the front lid portion 8B of the inner tube 8 and the front lid portion 4B of the outer tube 4. A leaf spring member may be provided in the axial gap between the rear lid portion 8C of the inner tube 8 and the rear lid portion 4C of the outer tube 4. The leaf spring member is not limited to a disc spring.

  The particulate removing device of the present invention is applicable not only to diesel vehicles but also to all internal combustion engines. For example, the present invention can also be applied to an internal combustion engine used in an emergency generator, a private generator, an agricultural machine, or the like. Further, the present invention is not limited to the diesel gas discharge route, and it is useful to incorporate it into a different gas flow path.

1 is a schematic cross-sectional view showing a schematic configuration of a diesel particulate removing device according to an embodiment of the present invention. It is an exploded view which decomposes | disassembles and shows the diesel particulate removal apparatus. It is a top view which shows the external appearance of the diesel particulate removal apparatus. It is a figure which shows a mode that a filter unit is mounted | worn in the diesel particulate removal device. It is a perspective view which shows the component (attachment / detachment means) of the diesel particulate removal apparatus. It is a fractured sectional view showing the whole mechanical composition of the diesel particulate removal device. It is a photograph which shows a mode that the filter unit is mounted | worn in the diesel particulate removal apparatus. It is a partially expanded perspective view which shows schematically the structure of the metal filter integrated in the filter unit which comprises the apparatus. It is a partially expanded sectional view which shows typically the structure of another kind of metal filter integrated in the filter unit which comprises the apparatus. It is a partially expanded perspective view which shows the structure of the metal filter of the same kind roughly. It is a photograph which shows a mode that the filter unit is removed | desorbed in the diesel particulate removal apparatus. It is a photograph which shows a mode that the filter unit is removed | desorbed in the diesel particulate removal apparatus.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Diesel engine 2 Exhaust path 3 Diesel exhaust gas 4 Outer pipe 4A External cylinder part 4B Front cover part of outer pipe 4C Rear cover part of outer pipe 5 Filter unit (filter)
5A Internal cylinder (filter)
5B Filter section (filter)
6 Inlet pipe 7 Outlet pipe 8 Inner pipe 8B Front cover part of inner pipe 8C Rear cover part of inner pipe 9 Joint pipe with gasket (gasket)
DESCRIPTION OF SYMBOLS 10 Lid opening / closing cover 11 Detachment opening 12 Detachment means 13A Long bolt 13B Nut (double nut)
13C Force receiving plate 14 Disc spring (leaf spring member)
K emergency bypass flow path 15 Bypass valve (safety valve)
16 Pressure sensor (clogging sensor)
20 Disc spring pad

Claims (14)

An outer tube incorporated on the gas flow path and having openings on the inflow side and the outflow side of the gas, and attached to the outer tube to capture or capture and remove the particulates in the gas that has flowed in. A particulate removal device comprising a plurality of filter units for
The plurality of filter units are configured such that a filter is housed in a short inner cylinder part, and is connected to each other along the gas flow, and further combined with the gas inlet pipe and the outlet pipe, Except the inflow side and the outflow side, it constitutes a long inner tube with a sealed structure, and
A fine particle removing apparatus , wherein a side opening of the outer tube is provided with a detachable opening with a lid for attaching or removing each filter unit . Between the plurality of filter units each other, between the filter unit disposed on the most upstream side between said inlet pipe and said filter unit disposed on the most downstream side and said flow outlet tube, gasket is inserted, particulate filter according to claim 1, wherein the inner tube of the sealing structure is characterized by being composed. 3. The particulate removing apparatus according to claim 2 , wherein a joint pipe with the gasket for connecting the plurality of filter units is added to the inner pipe. When assembling the inner pipe, open the lid of the detachable opening, insert the filter units from the detachable opening, assemble the inner pipe, and disassemble the inner pipe 4. The particulate removing apparatus according to claim 3 , further comprising attachment / detachment means for removing each filter unit from the attachment / detachment opening. 5. The particulate removing apparatus according to claim 4 , wherein the attaching / detaching means has one or a plurality of long bolts. 5. The particulate removing apparatus according to claim 4 , wherein the attaching / detaching means includes one or a plurality of long bolts and a double nut. A leaf spring member for fixing the inner tube to the outer tube and absorbing thermal expansion is provided in an axial gap between the inner tube and the outer tube on the outflow side or the inflow side. The fine particle removing apparatus according to claim 1, wherein: When assembling the inner pipe, open the lid of the detachable opening, insert the filter units from the detachable opening, assemble the inner pipe, and disassemble the inner pipe In this case, an attaching / detaching means having one or a plurality of long bolts for taking out each of the filter units from the attaching / detaching opening is provided, and the attaching / detaching means of the attaching / detaching means is provided on the inflow side end surface or the outflow side end surface of the outer pipe. A long bolt is inserted, and a leaf spring member for absorbing thermal expansion is provided in an axial gap between the inner tube and the outer tube on the outflow side or the inflow side, and the long bolt is tightening the said plate spring member that is compression deformed, particulate filter according to claim 1, wherein said inner pipe is made to the structure fixed to the outer tube. 9. The particulate removing apparatus according to claim 8 , wherein the leaf spring member is a disc spring having an opening through which the inlet pipe or the outlet pipe is inserted at a central portion. 9. The fine particle according to claim 8 , wherein the gap between the inner pipe and the outer pipe is configured to function as an emergency bypass flow path of the gas when the pressure in the inner pipe increases rapidly. Removal device. 11. The particulate removing device according to claim 10 , wherein the inner pipe is provided with a safety valve for allowing the gas to flow through an emergency bypass flow path when the pressure in the inner pipe increases rapidly. Particulate filter according to claim 1, wherein the clogging sensor informing clogging of the filter unit is added. An outer pipe that is incorporated in the exhaust path of the diesel engine and has openings on the inflow side and the outflow side of the diesel exhaust gas, and is placed in the outer pipe to capture or capture particulates in the diesel exhaust gas. The fine particle removing device according to any one of claims 1 to 12 , further comprising a plurality of filter units for performing combustion removal. A diesel vehicle comprising the particulate removing device according to claim 13 .

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